* [PATCH V2 0/4] APM X-Gene Mailbox driver
@ 2015-04-22 22:18 ` Feng Kan
0 siblings, 0 replies; 95+ messages in thread
From: Feng Kan @ 2015-04-22 22:18 UTC (permalink / raw)
To: patches, jassisinghbrar, devicetree, linux-arm-kernel,
linux-kernel, linux-acpi
Cc: Feng Kan
This adds the mailbox driver for the APM X-Gene SoC
V2 change
- Add ACPI support
- use defines for reg offset
Feng Kan (4):
mailbox: add support for APM X-Gene platform mailbox driver
mailbox: xgene: add ACPI support for X-Gene mailbox driver
Documentation: mailbox: Add APM X-Gene SLIMpro mailbox dts
documentation
arm64: dts: mailbox device tree node for APM X-Gene platform.
.../bindings/mailbox/xgene-slimpro-mailbox.txt | 34 +++
arch/arm64/boot/dts/apm/apm-storm.dtsi | 14 ++
drivers/mailbox/Kconfig | 10 +
drivers/mailbox/Makefile | 2 +
drivers/mailbox/mailbox-xgene-slimpro.c | 271 +++++++++++++++++++++
5 files changed, 331 insertions(+)
create mode 100644 Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt
create mode 100644 drivers/mailbox/mailbox-xgene-slimpro.c
--
1.9.1
^ permalink raw reply [flat|nested] 95+ messages in thread* [PATCH V2 0/4] APM X-Gene Mailbox driver @ 2015-04-22 22:18 ` Feng Kan 0 siblings, 0 replies; 95+ messages in thread From: Feng Kan @ 2015-04-22 22:18 UTC (permalink / raw) To: linux-arm-kernel This adds the mailbox driver for the APM X-Gene SoC V2 change - Add ACPI support - use defines for reg offset Feng Kan (4): mailbox: add support for APM X-Gene platform mailbox driver mailbox: xgene: add ACPI support for X-Gene mailbox driver Documentation: mailbox: Add APM X-Gene SLIMpro mailbox dts documentation arm64: dts: mailbox device tree node for APM X-Gene platform. .../bindings/mailbox/xgene-slimpro-mailbox.txt | 34 +++ arch/arm64/boot/dts/apm/apm-storm.dtsi | 14 ++ drivers/mailbox/Kconfig | 10 + drivers/mailbox/Makefile | 2 + drivers/mailbox/mailbox-xgene-slimpro.c | 271 +++++++++++++++++++++ 5 files changed, 331 insertions(+) create mode 100644 Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt create mode 100644 drivers/mailbox/mailbox-xgene-slimpro.c -- 1.9.1 ^ permalink raw reply [flat|nested] 95+ messages in thread
* [PATCH V2 1/4] mailbox: add support for APM X-Gene platform mailbox driver 2015-04-22 22:18 ` Feng Kan @ 2015-04-22 22:18 ` Feng Kan -1 siblings, 0 replies; 95+ messages in thread From: Feng Kan @ 2015-04-22 22:18 UTC (permalink / raw) To: patches, jassisinghbrar, devicetree, linux-arm-kernel, linux-kernel, linux-acpi Cc: Feng Kan Add support for APM X-Gene platform mailbox driver. Signed-off-by: Feng Kan <fkan@apm.com> --- drivers/mailbox/Kconfig | 10 ++ drivers/mailbox/Makefile | 2 + drivers/mailbox/mailbox-xgene-slimpro.c | 261 ++++++++++++++++++++++++++++++++ 3 files changed, 273 insertions(+) create mode 100644 drivers/mailbox/mailbox-xgene-slimpro.c diff --git a/drivers/mailbox/Kconfig b/drivers/mailbox/Kconfig index 84b0a2d..64120cc 100644 --- a/drivers/mailbox/Kconfig +++ b/drivers/mailbox/Kconfig @@ -60,4 +60,14 @@ config ALTERA_MBOX An implementation of the Altera Mailbox soft core. It is used to send message between processors. Say Y here if you want to use the Altera mailbox support. + +config XGENE_SLIMPRO_MBOX + tristate "APM SoC X-Gene SLIMpro Mailbox Controller" + depends on ARCH_XGENE + help + An implementation of the APM X-Gene Interprocessor Communication + Mailbox (IPCM) between the ARM 64-bit cores and SLIMpro controller. + It is used to send short messages between ARM64-bit cores and + the SLIMpro Management Engine, primarily for PM. Say Y here if you + want to use the APM X-Gene SLIMpro IPCM support. endif diff --git a/drivers/mailbox/Makefile b/drivers/mailbox/Makefile index b18201e..1e0bed5 100644 --- a/drivers/mailbox/Makefile +++ b/drivers/mailbox/Makefile @@ -11,3 +11,5 @@ obj-$(CONFIG_OMAP2PLUS_MBOX) += omap-mailbox.o obj-$(CONFIG_PCC) += pcc.o obj-$(CONFIG_ALTERA_MBOX) += mailbox-altera.o + +obj-$(CONFIG_XGENE_SLIMPRO_MBOX) += mailbox-xgene-slimpro.o diff --git a/drivers/mailbox/mailbox-xgene-slimpro.c b/drivers/mailbox/mailbox-xgene-slimpro.c new file mode 100644 index 0000000..49370e5 --- /dev/null +++ b/drivers/mailbox/mailbox-xgene-slimpro.c @@ -0,0 +1,261 @@ +/* + * APM X-Gene SLIMpro MailBox Driver + * + * Copyright (c) 2014, Applied Micro Circuits Corporation + * Author: Feng Kan fkan@apm.com + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <http://www.gnu.org/licenses/>. + * + */ +#include <linux/delay.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/mailbox_controller.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/spinlock.h> + +#define MBOX_CON_NAME "slimpro-mbox" +#define MBOX_REG_SET_OFFSET 0x1000 +#define MBOX_CNT 8 +#define MBOX_STATUS_AVAIL_MASK BIT(16) +#define MBOX_STATUS_ACK_MASK BIT(0) + +/* Configuration and Status Registers */ +#define REG_DB_IN 0x00 +#define REG_DB_DIN0 0x04 +#define REG_DB_DIN1 0x08 +#define REG_DB_OUT 0x10 +#define REG_DB_DOUT0 0x14 +#define REG_DB_DOUT1 0x18 +#define REG_DB_STAT 0x20 +#define REG_DB_STATMASK 0x24 + +struct slimpro_mbox_chan { + struct device *dev; + struct mbox_chan *chan; + void __iomem *reg; + int id; + int irq; + u32 rx_msg[3]; +}; + +struct slimpro_mbox { + struct mbox_controller mb_ctrl; + struct slimpro_mbox_chan mc[MBOX_CNT]; + struct mbox_chan chans[MBOX_CNT]; +}; + +static inline void mb_chan_send_msg(struct slimpro_mbox_chan *mb_chan, u32 *msg) +{ + writel(msg[1], mb_chan->reg + REG_DB_DOUT0); + writel(msg[2], mb_chan->reg + REG_DB_DOUT1); + writel(msg[0], mb_chan->reg + REG_DB_OUT); +} + +static inline void mb_chan_recv_msg(struct slimpro_mbox_chan *mb_chan) +{ + mb_chan->rx_msg[1] = readl(mb_chan->reg + REG_DB_DIN0); + mb_chan->rx_msg[2] = readl(mb_chan->reg + REG_DB_DIN1); + mb_chan->rx_msg[0] = readl(mb_chan->reg + REG_DB_IN); +} + +static void mb_chan_enable_int(struct slimpro_mbox_chan *mb_chan, u32 mask) +{ + u32 val = readl(mb_chan->reg + REG_DB_STATMASK); + + val &= ~mask; + + writel(val, mb_chan->reg + REG_DB_STATMASK); +} + +static void mb_chan_disable_int(struct slimpro_mbox_chan *mb_chan, u32 mask) +{ + u32 val = readl(mb_chan->reg + REG_DB_STATMASK); + + val |= mask; + + writel(val, mb_chan->reg + REG_DB_STATMASK); +} + +static int mb_chan_status_ack(struct slimpro_mbox_chan *mb_chan) +{ + u32 val = readl(mb_chan->reg + REG_DB_STAT); + + if (val & MBOX_STATUS_ACK_MASK) { + writel(MBOX_STATUS_ACK_MASK, mb_chan->reg + REG_DB_STAT); + return 1; + } + return 0; +} + +static int mb_chan_status_avail(struct slimpro_mbox_chan *mb_chan) +{ + u32 val = readl(mb_chan->reg + REG_DB_STAT); + + if (val & MBOX_STATUS_AVAIL_MASK) { + mb_chan_recv_msg(mb_chan); + writel(MBOX_STATUS_AVAIL_MASK, mb_chan->reg + REG_DB_STAT); + return 1; + } + return 0; +} + +static irqreturn_t slimpro_mbox_irq(int irq, void *id) +{ + struct slimpro_mbox_chan *mb_chan = id; + + if (mb_chan_status_ack(mb_chan)) + mbox_chan_txdone(mb_chan->chan, 0); + + if (mb_chan_status_avail(mb_chan)) + mbox_chan_received_data(mb_chan->chan, mb_chan->rx_msg); + + return IRQ_HANDLED; +} + +static int slimpro_mbox_send_data(struct mbox_chan *chan, void *msg) +{ + struct slimpro_mbox_chan *mb_chan = + (struct slimpro_mbox_chan *)chan->con_priv; + + mb_chan_send_msg(mb_chan, msg); + return 0; +} + +static int slimpro_mbox_startup(struct mbox_chan *chan) +{ + struct slimpro_mbox_chan *mb_chan = + (struct slimpro_mbox_chan *)chan->con_priv; + int rc; + + rc = devm_request_irq(mb_chan->dev, mb_chan->irq, slimpro_mbox_irq, 0, + MBOX_CON_NAME, mb_chan); + if (unlikely(rc)) { + dev_err(mb_chan->dev, "failed to register mailbox interrupt %d\n", + mb_chan->irq); + return rc; + } + + /* Enable HW interrupt */ + writel(MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK, + mb_chan->reg + REG_DB_STAT); + mb_chan_enable_int(mb_chan, MBOX_STATUS_ACK_MASK | + MBOX_STATUS_AVAIL_MASK); + return 0; +} + +static void slimpro_mbox_shutdown(struct mbox_chan *chan) +{ + struct slimpro_mbox_chan *mb_chan = + (struct slimpro_mbox_chan *)chan->con_priv; + + mb_chan_disable_int(mb_chan, MBOX_STATUS_ACK_MASK | + MBOX_STATUS_AVAIL_MASK); + devm_free_irq(mb_chan->dev, mb_chan->irq, mb_chan); +} + +static struct mbox_chan_ops slimpro_mbox_ops = { + .send_data = slimpro_mbox_send_data, + .startup = slimpro_mbox_startup, + .shutdown = slimpro_mbox_shutdown, +}; + +static int __init slimpro_mbox_probe(struct platform_device *pdev) +{ + struct slimpro_mbox *ctx; + struct resource *regs; + void __iomem *mb_base; + int rc; + int i; + + ctx = devm_kzalloc(&pdev->dev, sizeof(struct slimpro_mbox), GFP_KERNEL); + if (IS_ERR(ctx)) + return PTR_ERR(ctx); + + platform_set_drvdata(pdev, ctx); + + regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); + mb_base = devm_ioremap(&pdev->dev, regs->start, resource_size(regs)); + if (IS_ERR(mb_base)) + return PTR_ERR(mb_base); + + /* Setup mailbox links */ + for (i = 0; i < MBOX_CNT; i++) { + ctx->mc[i].irq = platform_get_irq(pdev, i); + if (ctx->mc[i].irq < 0) { + dev_err(&pdev->dev, "no IRQ at index %d\n", + ctx->mc[i].irq); + return -ENODEV; + } + + ctx->mc[i].dev = &pdev->dev; + ctx->mc[i].reg = mb_base + i * MBOX_REG_SET_OFFSET; + ctx->mc[i].id = i; + ctx->mc[i].chan = &ctx->chans[i]; + ctx->chans[i].con_priv = &ctx->mc[i]; + } + + /* Setup mailbox controller */ + ctx->mb_ctrl.dev = &pdev->dev; + ctx->mb_ctrl.chans = ctx->chans; + ctx->mb_ctrl.txdone_irq = true; + ctx->mb_ctrl.ops = &slimpro_mbox_ops; + ctx->mb_ctrl.num_chans = MBOX_CNT; + + rc = mbox_controller_register(&ctx->mb_ctrl); + if (rc) { + dev_err(&pdev->dev, + "APM X-Gene SLIMpro MailBox register failed:%d\n", rc); + return rc; + } + + dev_info(&pdev->dev, "APM X-Gene SLIMpro MailBox registered\n"); + return 0; +} + +static int slimpro_mbox_remove(struct platform_device *pdev) +{ + struct slimpro_mbox *smb = platform_get_drvdata(pdev); + + mbox_controller_unregister(&smb->mb_ctrl); + return 0; +} + +static const struct of_device_id slimpro_of_match[] = { + {.compatible = "apm,xgene-slimpro-mbox" }, + { }, +}; +MODULE_DEVICE_TABLE(of, slimpro_of_match); + +static struct platform_driver slimpro_mbox_driver = { + .probe = slimpro_mbox_probe, + .remove = slimpro_mbox_remove, + .driver = { + .name = "xgene-slimpro-mbox", + .owner = THIS_MODULE, + .of_match_table = of_match_ptr(slimpro_of_match), + }, +}; + +static int __init slimpro_mbox_init(void) +{ + return platform_driver_register(&slimpro_mbox_driver); +} + +subsys_initcall(slimpro_mbox_init); + +MODULE_DESCRIPTION("APM X-Gene SLIMpro Mailbox Driver"); +MODULE_LICENSE("GPL"); -- 1.9.1 ^ permalink raw reply related [flat|nested] 95+ messages in thread
* [PATCH V2 1/4] mailbox: add support for APM X-Gene platform mailbox driver @ 2015-04-22 22:18 ` Feng Kan 0 siblings, 0 replies; 95+ messages in thread From: Feng Kan @ 2015-04-22 22:18 UTC (permalink / raw) To: linux-arm-kernel Add support for APM X-Gene platform mailbox driver. Signed-off-by: Feng Kan <fkan@apm.com> --- drivers/mailbox/Kconfig | 10 ++ drivers/mailbox/Makefile | 2 + drivers/mailbox/mailbox-xgene-slimpro.c | 261 ++++++++++++++++++++++++++++++++ 3 files changed, 273 insertions(+) create mode 100644 drivers/mailbox/mailbox-xgene-slimpro.c diff --git a/drivers/mailbox/Kconfig b/drivers/mailbox/Kconfig index 84b0a2d..64120cc 100644 --- a/drivers/mailbox/Kconfig +++ b/drivers/mailbox/Kconfig @@ -60,4 +60,14 @@ config ALTERA_MBOX An implementation of the Altera Mailbox soft core. It is used to send message between processors. Say Y here if you want to use the Altera mailbox support. + +config XGENE_SLIMPRO_MBOX + tristate "APM SoC X-Gene SLIMpro Mailbox Controller" + depends on ARCH_XGENE + help + An implementation of the APM X-Gene Interprocessor Communication + Mailbox (IPCM) between the ARM 64-bit cores and SLIMpro controller. + It is used to send short messages between ARM64-bit cores and + the SLIMpro Management Engine, primarily for PM. Say Y here if you + want to use the APM X-Gene SLIMpro IPCM support. endif diff --git a/drivers/mailbox/Makefile b/drivers/mailbox/Makefile index b18201e..1e0bed5 100644 --- a/drivers/mailbox/Makefile +++ b/drivers/mailbox/Makefile @@ -11,3 +11,5 @@ obj-$(CONFIG_OMAP2PLUS_MBOX) += omap-mailbox.o obj-$(CONFIG_PCC) += pcc.o obj-$(CONFIG_ALTERA_MBOX) += mailbox-altera.o + +obj-$(CONFIG_XGENE_SLIMPRO_MBOX) += mailbox-xgene-slimpro.o diff --git a/drivers/mailbox/mailbox-xgene-slimpro.c b/drivers/mailbox/mailbox-xgene-slimpro.c new file mode 100644 index 0000000..49370e5 --- /dev/null +++ b/drivers/mailbox/mailbox-xgene-slimpro.c @@ -0,0 +1,261 @@ +/* + * APM X-Gene SLIMpro MailBox Driver + * + * Copyright (c) 2014, Applied Micro Circuits Corporation + * Author: Feng Kan fkan at apm.com + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <http://www.gnu.org/licenses/>. + * + */ +#include <linux/delay.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/mailbox_controller.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/spinlock.h> + +#define MBOX_CON_NAME "slimpro-mbox" +#define MBOX_REG_SET_OFFSET 0x1000 +#define MBOX_CNT 8 +#define MBOX_STATUS_AVAIL_MASK BIT(16) +#define MBOX_STATUS_ACK_MASK BIT(0) + +/* Configuration and Status Registers */ +#define REG_DB_IN 0x00 +#define REG_DB_DIN0 0x04 +#define REG_DB_DIN1 0x08 +#define REG_DB_OUT 0x10 +#define REG_DB_DOUT0 0x14 +#define REG_DB_DOUT1 0x18 +#define REG_DB_STAT 0x20 +#define REG_DB_STATMASK 0x24 + +struct slimpro_mbox_chan { + struct device *dev; + struct mbox_chan *chan; + void __iomem *reg; + int id; + int irq; + u32 rx_msg[3]; +}; + +struct slimpro_mbox { + struct mbox_controller mb_ctrl; + struct slimpro_mbox_chan mc[MBOX_CNT]; + struct mbox_chan chans[MBOX_CNT]; +}; + +static inline void mb_chan_send_msg(struct slimpro_mbox_chan *mb_chan, u32 *msg) +{ + writel(msg[1], mb_chan->reg + REG_DB_DOUT0); + writel(msg[2], mb_chan->reg + REG_DB_DOUT1); + writel(msg[0], mb_chan->reg + REG_DB_OUT); +} + +static inline void mb_chan_recv_msg(struct slimpro_mbox_chan *mb_chan) +{ + mb_chan->rx_msg[1] = readl(mb_chan->reg + REG_DB_DIN0); + mb_chan->rx_msg[2] = readl(mb_chan->reg + REG_DB_DIN1); + mb_chan->rx_msg[0] = readl(mb_chan->reg + REG_DB_IN); +} + +static void mb_chan_enable_int(struct slimpro_mbox_chan *mb_chan, u32 mask) +{ + u32 val = readl(mb_chan->reg + REG_DB_STATMASK); + + val &= ~mask; + + writel(val, mb_chan->reg + REG_DB_STATMASK); +} + +static void mb_chan_disable_int(struct slimpro_mbox_chan *mb_chan, u32 mask) +{ + u32 val = readl(mb_chan->reg + REG_DB_STATMASK); + + val |= mask; + + writel(val, mb_chan->reg + REG_DB_STATMASK); +} + +static int mb_chan_status_ack(struct slimpro_mbox_chan *mb_chan) +{ + u32 val = readl(mb_chan->reg + REG_DB_STAT); + + if (val & MBOX_STATUS_ACK_MASK) { + writel(MBOX_STATUS_ACK_MASK, mb_chan->reg + REG_DB_STAT); + return 1; + } + return 0; +} + +static int mb_chan_status_avail(struct slimpro_mbox_chan *mb_chan) +{ + u32 val = readl(mb_chan->reg + REG_DB_STAT); + + if (val & MBOX_STATUS_AVAIL_MASK) { + mb_chan_recv_msg(mb_chan); + writel(MBOX_STATUS_AVAIL_MASK, mb_chan->reg + REG_DB_STAT); + return 1; + } + return 0; +} + +static irqreturn_t slimpro_mbox_irq(int irq, void *id) +{ + struct slimpro_mbox_chan *mb_chan = id; + + if (mb_chan_status_ack(mb_chan)) + mbox_chan_txdone(mb_chan->chan, 0); + + if (mb_chan_status_avail(mb_chan)) + mbox_chan_received_data(mb_chan->chan, mb_chan->rx_msg); + + return IRQ_HANDLED; +} + +static int slimpro_mbox_send_data(struct mbox_chan *chan, void *msg) +{ + struct slimpro_mbox_chan *mb_chan = + (struct slimpro_mbox_chan *)chan->con_priv; + + mb_chan_send_msg(mb_chan, msg); + return 0; +} + +static int slimpro_mbox_startup(struct mbox_chan *chan) +{ + struct slimpro_mbox_chan *mb_chan = + (struct slimpro_mbox_chan *)chan->con_priv; + int rc; + + rc = devm_request_irq(mb_chan->dev, mb_chan->irq, slimpro_mbox_irq, 0, + MBOX_CON_NAME, mb_chan); + if (unlikely(rc)) { + dev_err(mb_chan->dev, "failed to register mailbox interrupt %d\n", + mb_chan->irq); + return rc; + } + + /* Enable HW interrupt */ + writel(MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK, + mb_chan->reg + REG_DB_STAT); + mb_chan_enable_int(mb_chan, MBOX_STATUS_ACK_MASK | + MBOX_STATUS_AVAIL_MASK); + return 0; +} + +static void slimpro_mbox_shutdown(struct mbox_chan *chan) +{ + struct slimpro_mbox_chan *mb_chan = + (struct slimpro_mbox_chan *)chan->con_priv; + + mb_chan_disable_int(mb_chan, MBOX_STATUS_ACK_MASK | + MBOX_STATUS_AVAIL_MASK); + devm_free_irq(mb_chan->dev, mb_chan->irq, mb_chan); +} + +static struct mbox_chan_ops slimpro_mbox_ops = { + .send_data = slimpro_mbox_send_data, + .startup = slimpro_mbox_startup, + .shutdown = slimpro_mbox_shutdown, +}; + +static int __init slimpro_mbox_probe(struct platform_device *pdev) +{ + struct slimpro_mbox *ctx; + struct resource *regs; + void __iomem *mb_base; + int rc; + int i; + + ctx = devm_kzalloc(&pdev->dev, sizeof(struct slimpro_mbox), GFP_KERNEL); + if (IS_ERR(ctx)) + return PTR_ERR(ctx); + + platform_set_drvdata(pdev, ctx); + + regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); + mb_base = devm_ioremap(&pdev->dev, regs->start, resource_size(regs)); + if (IS_ERR(mb_base)) + return PTR_ERR(mb_base); + + /* Setup mailbox links */ + for (i = 0; i < MBOX_CNT; i++) { + ctx->mc[i].irq = platform_get_irq(pdev, i); + if (ctx->mc[i].irq < 0) { + dev_err(&pdev->dev, "no IRQ at index %d\n", + ctx->mc[i].irq); + return -ENODEV; + } + + ctx->mc[i].dev = &pdev->dev; + ctx->mc[i].reg = mb_base + i * MBOX_REG_SET_OFFSET; + ctx->mc[i].id = i; + ctx->mc[i].chan = &ctx->chans[i]; + ctx->chans[i].con_priv = &ctx->mc[i]; + } + + /* Setup mailbox controller */ + ctx->mb_ctrl.dev = &pdev->dev; + ctx->mb_ctrl.chans = ctx->chans; + ctx->mb_ctrl.txdone_irq = true; + ctx->mb_ctrl.ops = &slimpro_mbox_ops; + ctx->mb_ctrl.num_chans = MBOX_CNT; + + rc = mbox_controller_register(&ctx->mb_ctrl); + if (rc) { + dev_err(&pdev->dev, + "APM X-Gene SLIMpro MailBox register failed:%d\n", rc); + return rc; + } + + dev_info(&pdev->dev, "APM X-Gene SLIMpro MailBox registered\n"); + return 0; +} + +static int slimpro_mbox_remove(struct platform_device *pdev) +{ + struct slimpro_mbox *smb = platform_get_drvdata(pdev); + + mbox_controller_unregister(&smb->mb_ctrl); + return 0; +} + +static const struct of_device_id slimpro_of_match[] = { + {.compatible = "apm,xgene-slimpro-mbox" }, + { }, +}; +MODULE_DEVICE_TABLE(of, slimpro_of_match); + +static struct platform_driver slimpro_mbox_driver = { + .probe = slimpro_mbox_probe, + .remove = slimpro_mbox_remove, + .driver = { + .name = "xgene-slimpro-mbox", + .owner = THIS_MODULE, + .of_match_table = of_match_ptr(slimpro_of_match), + }, +}; + +static int __init slimpro_mbox_init(void) +{ + return platform_driver_register(&slimpro_mbox_driver); +} + +subsys_initcall(slimpro_mbox_init); + +MODULE_DESCRIPTION("APM X-Gene SLIMpro Mailbox Driver"); +MODULE_LICENSE("GPL"); -- 1.9.1 ^ permalink raw reply related [flat|nested] 95+ messages in thread
* Re: [PATCH V2 1/4] mailbox: add support for APM X-Gene platform mailbox driver 2015-04-22 22:18 ` Feng Kan @ 2015-04-24 8:25 ` Paul Bolle -1 siblings, 0 replies; 95+ messages in thread From: Paul Bolle @ 2015-04-24 8:25 UTC (permalink / raw) To: Feng Kan Cc: patches, jassisinghbrar, devicetree, linux-arm-kernel, linux-kernel, linux-acpi On Wed, 2015-04-22 at 15:18 -0700, Feng Kan wrote: > --- /dev/null > +++ b/drivers/mailbox/mailbox-xgene-slimpro.c > +static struct platform_driver slimpro_mbox_driver = { > + .probe = slimpro_mbox_probe, > + .remove = slimpro_mbox_remove, > + .driver = { > + .name = "xgene-slimpro-mbox", > + .owner = THIS_MODULE, > + .of_match_table = of_match_ptr(slimpro_of_match), > + }, > +}; > + > +static int __init slimpro_mbox_init(void) > +{ > + return platform_driver_register(&slimpro_mbox_driver); > +} > + > +subsys_initcall(slimpro_mbox_init); After a quick scan of this driver you'd expect something like static void __exit slimpro_mbox_exit(void) { platform_driver_unregister(&slimpro_mbox_driver); } module_exit(slimpro_mbox_exit); too here. At least, I do. Is there some non-obvious (to me) reason this driver can't be unloaded if it is built as a module? > +MODULE_DESCRIPTION("APM X-Gene SLIMpro Mailbox Driver"); > +MODULE_LICENSE("GPL"); Thanks, Paul Bolle ^ permalink raw reply [flat|nested] 95+ messages in thread
* [PATCH V2 1/4] mailbox: add support for APM X-Gene platform mailbox driver @ 2015-04-24 8:25 ` Paul Bolle 0 siblings, 0 replies; 95+ messages in thread From: Paul Bolle @ 2015-04-24 8:25 UTC (permalink / raw) To: linux-arm-kernel On Wed, 2015-04-22 at 15:18 -0700, Feng Kan wrote: > --- /dev/null > +++ b/drivers/mailbox/mailbox-xgene-slimpro.c > +static struct platform_driver slimpro_mbox_driver = { > + .probe = slimpro_mbox_probe, > + .remove = slimpro_mbox_remove, > + .driver = { > + .name = "xgene-slimpro-mbox", > + .owner = THIS_MODULE, > + .of_match_table = of_match_ptr(slimpro_of_match), > + }, > +}; > + > +static int __init slimpro_mbox_init(void) > +{ > + return platform_driver_register(&slimpro_mbox_driver); > +} > + > +subsys_initcall(slimpro_mbox_init); After a quick scan of this driver you'd expect something like static void __exit slimpro_mbox_exit(void) { platform_driver_unregister(&slimpro_mbox_driver); } module_exit(slimpro_mbox_exit); too here. At least, I do. Is there some non-obvious (to me) reason this driver can't be unloaded if it is built as a module? > +MODULE_DESCRIPTION("APM X-Gene SLIMpro Mailbox Driver"); > +MODULE_LICENSE("GPL"); Thanks, Paul Bolle ^ permalink raw reply [flat|nested] 95+ messages in thread
* [PATCH v3 0/3] mailbox: Add APM X-Gene platform mailbox driver 2015-04-24 8:25 ` Paul Bolle @ 2015-11-09 18:05 ` Duc Dang -1 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2015-11-09 18:05 UTC (permalink / raw) To: linux-arm-kernel APM X-Gene SoC has a mailbox controller that provides communication mechanism for X-Gene Arm64 cores to communicate with X-Gene SoC's Cortex M3 (SLIMpro) processor. X-Gene mailbox controller provides 8 mailbox channels, with each channel has a dedicated interrupt line. Changes since v2: - Rebase Feng's patch set over v4.3-rc5 - Remove uneccessary 'inline' in function definition - Use module_platform_driver instead of subsys_initcall - Minor coding stype clean up Changes since v1: - Add ACPI support - Use defines for reg offset .../bindings/mailbox/xgene-slimpro-mailbox.txt | 34 +++ arch/arm64/boot/dts/apm/apm-storm.dtsi | 14 ++ drivers/mailbox/Kconfig | 9 + drivers/mailbox/Makefile | 2 + drivers/mailbox/mailbox-xgene-slimpro.c | 264 +++++++++++++++++++++ 5 files changed, 323 insertions(+) create mode 100644 Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt create mode 100644 drivers/mailbox/mailbox-xgene-slimpro.c -- 1.9.1 ^ permalink raw reply [flat|nested] 95+ messages in thread
* [PATCH v3 0/3] mailbox: Add APM X-Gene platform mailbox driver @ 2015-11-09 18:05 ` Duc Dang 0 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2015-11-09 18:05 UTC (permalink / raw) To: Jassi Brar, Paul Bolle Cc: devicetree, linux-arm-kernel, linux-kernel, patches, Duc Dang APM X-Gene SoC has a mailbox controller that provides communication mechanism for X-Gene Arm64 cores to communicate with X-Gene SoC's Cortex M3 (SLIMpro) processor. X-Gene mailbox controller provides 8 mailbox channels, with each channel has a dedicated interrupt line. Changes since v2: - Rebase Feng's patch set over v4.3-rc5 - Remove uneccessary 'inline' in function definition - Use module_platform_driver instead of subsys_initcall - Minor coding stype clean up Changes since v1: - Add ACPI support - Use defines for reg offset .../bindings/mailbox/xgene-slimpro-mailbox.txt | 34 +++ arch/arm64/boot/dts/apm/apm-storm.dtsi | 14 ++ drivers/mailbox/Kconfig | 9 + drivers/mailbox/Makefile | 2 + drivers/mailbox/mailbox-xgene-slimpro.c | 264 +++++++++++++++++++++ 5 files changed, 323 insertions(+) create mode 100644 Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt create mode 100644 drivers/mailbox/mailbox-xgene-slimpro.c -- 1.9.1 ^ permalink raw reply [flat|nested] 95+ messages in thread
* [PATCH v3 1/3] mailbox: Add support for APM X-Gene platform mailbox driver 2015-11-09 18:05 ` Duc Dang @ 2015-11-09 18:05 ` Duc Dang -1 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2015-11-09 18:05 UTC (permalink / raw) To: linux-arm-kernel X-Gene mailbox controller provides 8 mailbox channels, with each channel has a dedicated interrupt line. [dhdang: rebase over 4.3-rc5, some minor changes to address comment in v2 patch set] Signed-off-by: Feng Kan <fkan@apm.com> Signed-off-by: Duc Dang <dhdang@apm.com> --- drivers/mailbox/Kconfig | 9 ++ drivers/mailbox/Makefile | 2 + drivers/mailbox/mailbox-xgene-slimpro.c | 264 ++++++++++++++++++++++++++++++++ 3 files changed, 275 insertions(+) create mode 100644 drivers/mailbox/mailbox-xgene-slimpro.c diff --git a/drivers/mailbox/Kconfig b/drivers/mailbox/Kconfig index bbec500..ae37d39 100644 --- a/drivers/mailbox/Kconfig +++ b/drivers/mailbox/Kconfig @@ -71,4 +71,13 @@ config BCM2835_MBOX the services of the Videocore. Say Y here if you want to use the BCM2835 Mailbox. +config XGENE_SLIMPRO_MBOX + tristate "APM SoC X-Gene SLIMpro Mailbox Controller" + depends on ARCH_XGENE + help + An implementation of the APM X-Gene Interprocessor Communication + Mailbox (IPCM) between the ARM 64-bit cores and SLIMpro controller. + It is used to send short messages between ARM64-bit cores and + the SLIMpro Management Engine, primarily for PM. Say Y here if you + want to use the APM X-Gene SLIMpro IPCM support. endif diff --git a/drivers/mailbox/Makefile b/drivers/mailbox/Makefile index 8e6d822..6a78df7 100644 --- a/drivers/mailbox/Makefile +++ b/drivers/mailbox/Makefile @@ -13,3 +13,5 @@ obj-$(CONFIG_PCC) += pcc.o obj-$(CONFIG_ALTERA_MBOX) += mailbox-altera.o obj-$(CONFIG_BCM2835_MBOX) += bcm2835-mailbox.o + +obj-$(CONFIG_XGENE_SLIMPRO_MBOX) += mailbox-xgene-slimpro.o diff --git a/drivers/mailbox/mailbox-xgene-slimpro.c b/drivers/mailbox/mailbox-xgene-slimpro.c new file mode 100644 index 0000000..4753353 --- /dev/null +++ b/drivers/mailbox/mailbox-xgene-slimpro.c @@ -0,0 +1,264 @@ +/* + * APM X-Gene SLIMpro MailBox Driver + * + * Copyright (c) 2015, Applied Micro Circuits Corporation + * Author: Feng Kan fkan at apm.com + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <http://www.gnu.org/licenses/>. + * + */ +#include <linux/acpi.h> +#include <linux/delay.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/mailbox_controller.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/spinlock.h> + +#define MBOX_CON_NAME "slimpro-mbox" +#define MBOX_REG_SET_OFFSET 0x1000 +#define MBOX_CNT 8 +#define MBOX_STATUS_AVAIL_MASK BIT(16) +#define MBOX_STATUS_ACK_MASK BIT(0) + +/* Configuration and Status Registers */ +#define REG_DB_IN 0x00 +#define REG_DB_DIN0 0x04 +#define REG_DB_DIN1 0x08 +#define REG_DB_OUT 0x10 +#define REG_DB_DOUT0 0x14 +#define REG_DB_DOUT1 0x18 +#define REG_DB_STAT 0x20 +#define REG_DB_STATMASK 0x24 + +struct slimpro_mbox_chan { + struct device *dev; + struct mbox_chan *chan; + void __iomem *reg; + int id; + int irq; + u32 rx_msg[3]; +}; + +struct slimpro_mbox { + struct mbox_controller mb_ctrl; + struct slimpro_mbox_chan mc[MBOX_CNT]; + struct mbox_chan chans[MBOX_CNT]; +}; + +static void mb_chan_send_msg(struct slimpro_mbox_chan *mb_chan, u32 *msg) +{ + writel(msg[1], mb_chan->reg + REG_DB_DOUT0); + writel(msg[2], mb_chan->reg + REG_DB_DOUT1); + writel(msg[0], mb_chan->reg + REG_DB_OUT); +} + +static void mb_chan_recv_msg(struct slimpro_mbox_chan *mb_chan) +{ + mb_chan->rx_msg[1] = readl(mb_chan->reg + REG_DB_DIN0); + mb_chan->rx_msg[2] = readl(mb_chan->reg + REG_DB_DIN1); + mb_chan->rx_msg[0] = readl(mb_chan->reg + REG_DB_IN); +} + +static void mb_chan_enable_int(struct slimpro_mbox_chan *mb_chan, u32 mask) +{ + u32 val = readl(mb_chan->reg + REG_DB_STATMASK); + + val &= ~mask; + writel(val, mb_chan->reg + REG_DB_STATMASK); +} + +static void mb_chan_disable_int(struct slimpro_mbox_chan *mb_chan, u32 mask) +{ + u32 val = readl(mb_chan->reg + REG_DB_STATMASK); + + val |= mask; + writel(val, mb_chan->reg + REG_DB_STATMASK); +} + +static int mb_chan_status_ack(struct slimpro_mbox_chan *mb_chan) +{ + u32 val = readl(mb_chan->reg + REG_DB_STAT); + + if (val & MBOX_STATUS_ACK_MASK) { + writel(MBOX_STATUS_ACK_MASK, mb_chan->reg + REG_DB_STAT); + return 1; + } + return 0; +} + +static int mb_chan_status_avail(struct slimpro_mbox_chan *mb_chan) +{ + u32 val = readl(mb_chan->reg + REG_DB_STAT); + + if (val & MBOX_STATUS_AVAIL_MASK) { + mb_chan_recv_msg(mb_chan); + writel(MBOX_STATUS_AVAIL_MASK, mb_chan->reg + REG_DB_STAT); + return 1; + } + return 0; +} + +static irqreturn_t slimpro_mbox_irq(int irq, void *id) +{ + struct slimpro_mbox_chan *mb_chan = id; + + if (mb_chan_status_ack(mb_chan)) + mbox_chan_txdone(mb_chan->chan, 0); + + if (mb_chan_status_avail(mb_chan)) + mbox_chan_received_data(mb_chan->chan, mb_chan->rx_msg); + + return IRQ_HANDLED; +} + +static int slimpro_mbox_send_data(struct mbox_chan *chan, void *msg) +{ + struct slimpro_mbox_chan *mb_chan = + (struct slimpro_mbox_chan *)chan->con_priv; + + mb_chan_send_msg(mb_chan, msg); + return 0; +} + +static int slimpro_mbox_startup(struct mbox_chan *chan) +{ + struct slimpro_mbox_chan *mb_chan = + (struct slimpro_mbox_chan *)chan->con_priv; + int rc; + + rc = devm_request_irq(mb_chan->dev, mb_chan->irq, slimpro_mbox_irq, 0, + MBOX_CON_NAME, mb_chan); + if (unlikely(rc)) { + dev_err(mb_chan->dev, "failed to register mailbox interrupt %d\n", + mb_chan->irq); + return rc; + } + + /* Enable HW interrupt */ + writel(MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK, + mb_chan->reg + REG_DB_STAT); + mb_chan_enable_int(mb_chan, MBOX_STATUS_ACK_MASK | + MBOX_STATUS_AVAIL_MASK); + return 0; +} + +static void slimpro_mbox_shutdown(struct mbox_chan *chan) +{ + struct slimpro_mbox_chan *mb_chan = + (struct slimpro_mbox_chan *)chan->con_priv; + + mb_chan_disable_int(mb_chan, MBOX_STATUS_ACK_MASK | + MBOX_STATUS_AVAIL_MASK); + devm_free_irq(mb_chan->dev, mb_chan->irq, mb_chan); +} + +static struct mbox_chan_ops slimpro_mbox_ops = { + .send_data = slimpro_mbox_send_data, + .startup = slimpro_mbox_startup, + .shutdown = slimpro_mbox_shutdown, +}; + +static int __init slimpro_mbox_probe(struct platform_device *pdev) +{ + struct slimpro_mbox *ctx; + struct resource *regs; + void __iomem *mb_base; + int rc; + int i; + + ctx = devm_kzalloc(&pdev->dev, sizeof(struct slimpro_mbox), GFP_KERNEL); + if (IS_ERR(ctx)) + return PTR_ERR(ctx); + + platform_set_drvdata(pdev, ctx); + + regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); + mb_base = devm_ioremap(&pdev->dev, regs->start, resource_size(regs)); + if (IS_ERR(mb_base)) + return PTR_ERR(mb_base); + + /* Setup mailbox links */ + for (i = 0; i < MBOX_CNT; i++) { + ctx->mc[i].irq = platform_get_irq(pdev, i); + if (ctx->mc[i].irq < 0) { + dev_err(&pdev->dev, "no IRQ at index %d\n", + ctx->mc[i].irq); + return -ENODEV; + } + + ctx->mc[i].dev = &pdev->dev; + ctx->mc[i].reg = mb_base + i * MBOX_REG_SET_OFFSET; + ctx->mc[i].id = i; + ctx->mc[i].chan = &ctx->chans[i]; + ctx->chans[i].con_priv = &ctx->mc[i]; + } + + /* Setup mailbox controller */ + ctx->mb_ctrl.dev = &pdev->dev; + ctx->mb_ctrl.chans = ctx->chans; + ctx->mb_ctrl.txdone_irq = true; + ctx->mb_ctrl.ops = &slimpro_mbox_ops; + ctx->mb_ctrl.num_chans = MBOX_CNT; + + rc = mbox_controller_register(&ctx->mb_ctrl); + if (rc) { + dev_err(&pdev->dev, + "APM X-Gene SLIMpro MailBox register failed:%d\n", rc); + return rc; + } + + dev_info(&pdev->dev, "APM X-Gene SLIMpro MailBox registered\n"); + return 0; +} + +static int slimpro_mbox_remove(struct platform_device *pdev) +{ + struct slimpro_mbox *smb = platform_get_drvdata(pdev); + + mbox_controller_unregister(&smb->mb_ctrl); + return 0; +} + +static const struct of_device_id slimpro_of_match[] = { + {.compatible = "apm,xgene-slimpro-mbox" }, + { }, +}; +MODULE_DEVICE_TABLE(of, slimpro_of_match); + +#ifdef CONFIG_ACPI +static const struct acpi_device_id slimpro_acpi_ids[] = { + {"APMC0D01", 0}, + {} +}; +MODULE_DEVICE_TABLE(acpi, slimpro_acpi_ids); +#endif + +static struct platform_driver slimpro_mbox_driver = { + .probe = slimpro_mbox_probe, + .remove = slimpro_mbox_remove, + .driver = { + .name = "xgene-slimpro-mbox", + .owner = THIS_MODULE, + .of_match_table = of_match_ptr(slimpro_of_match), + .acpi_match_table = ACPI_PTR(slimpro_acpi_ids) + }, +}; + +module_platform_driver(slimpro_mbox_driver); + +MODULE_DESCRIPTION("APM X-Gene SLIMpro Mailbox Driver"); +MODULE_LICENSE("GPL"); -- 1.9.1 ^ permalink raw reply related [flat|nested] 95+ messages in thread
* [PATCH v3 1/3] mailbox: Add support for APM X-Gene platform mailbox driver @ 2015-11-09 18:05 ` Duc Dang 0 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2015-11-09 18:05 UTC (permalink / raw) To: Jassi Brar, Paul Bolle Cc: devicetree, linux-arm-kernel, linux-kernel, patches, Duc Dang, Feng Kan X-Gene mailbox controller provides 8 mailbox channels, with each channel has a dedicated interrupt line. [dhdang: rebase over 4.3-rc5, some minor changes to address comment in v2 patch set] Signed-off-by: Feng Kan <fkan@apm.com> Signed-off-by: Duc Dang <dhdang@apm.com> --- drivers/mailbox/Kconfig | 9 ++ drivers/mailbox/Makefile | 2 + drivers/mailbox/mailbox-xgene-slimpro.c | 264 ++++++++++++++++++++++++++++++++ 3 files changed, 275 insertions(+) create mode 100644 drivers/mailbox/mailbox-xgene-slimpro.c diff --git a/drivers/mailbox/Kconfig b/drivers/mailbox/Kconfig index bbec500..ae37d39 100644 --- a/drivers/mailbox/Kconfig +++ b/drivers/mailbox/Kconfig @@ -71,4 +71,13 @@ config BCM2835_MBOX the services of the Videocore. Say Y here if you want to use the BCM2835 Mailbox. +config XGENE_SLIMPRO_MBOX + tristate "APM SoC X-Gene SLIMpro Mailbox Controller" + depends on ARCH_XGENE + help + An implementation of the APM X-Gene Interprocessor Communication + Mailbox (IPCM) between the ARM 64-bit cores and SLIMpro controller. + It is used to send short messages between ARM64-bit cores and + the SLIMpro Management Engine, primarily for PM. Say Y here if you + want to use the APM X-Gene SLIMpro IPCM support. endif diff --git a/drivers/mailbox/Makefile b/drivers/mailbox/Makefile index 8e6d822..6a78df7 100644 --- a/drivers/mailbox/Makefile +++ b/drivers/mailbox/Makefile @@ -13,3 +13,5 @@ obj-$(CONFIG_PCC) += pcc.o obj-$(CONFIG_ALTERA_MBOX) += mailbox-altera.o obj-$(CONFIG_BCM2835_MBOX) += bcm2835-mailbox.o + +obj-$(CONFIG_XGENE_SLIMPRO_MBOX) += mailbox-xgene-slimpro.o diff --git a/drivers/mailbox/mailbox-xgene-slimpro.c b/drivers/mailbox/mailbox-xgene-slimpro.c new file mode 100644 index 0000000..4753353 --- /dev/null +++ b/drivers/mailbox/mailbox-xgene-slimpro.c @@ -0,0 +1,264 @@ +/* + * APM X-Gene SLIMpro MailBox Driver + * + * Copyright (c) 2015, Applied Micro Circuits Corporation + * Author: Feng Kan fkan@apm.com + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <http://www.gnu.org/licenses/>. + * + */ +#include <linux/acpi.h> +#include <linux/delay.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/mailbox_controller.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/spinlock.h> + +#define MBOX_CON_NAME "slimpro-mbox" +#define MBOX_REG_SET_OFFSET 0x1000 +#define MBOX_CNT 8 +#define MBOX_STATUS_AVAIL_MASK BIT(16) +#define MBOX_STATUS_ACK_MASK BIT(0) + +/* Configuration and Status Registers */ +#define REG_DB_IN 0x00 +#define REG_DB_DIN0 0x04 +#define REG_DB_DIN1 0x08 +#define REG_DB_OUT 0x10 +#define REG_DB_DOUT0 0x14 +#define REG_DB_DOUT1 0x18 +#define REG_DB_STAT 0x20 +#define REG_DB_STATMASK 0x24 + +struct slimpro_mbox_chan { + struct device *dev; + struct mbox_chan *chan; + void __iomem *reg; + int id; + int irq; + u32 rx_msg[3]; +}; + +struct slimpro_mbox { + struct mbox_controller mb_ctrl; + struct slimpro_mbox_chan mc[MBOX_CNT]; + struct mbox_chan chans[MBOX_CNT]; +}; + +static void mb_chan_send_msg(struct slimpro_mbox_chan *mb_chan, u32 *msg) +{ + writel(msg[1], mb_chan->reg + REG_DB_DOUT0); + writel(msg[2], mb_chan->reg + REG_DB_DOUT1); + writel(msg[0], mb_chan->reg + REG_DB_OUT); +} + +static void mb_chan_recv_msg(struct slimpro_mbox_chan *mb_chan) +{ + mb_chan->rx_msg[1] = readl(mb_chan->reg + REG_DB_DIN0); + mb_chan->rx_msg[2] = readl(mb_chan->reg + REG_DB_DIN1); + mb_chan->rx_msg[0] = readl(mb_chan->reg + REG_DB_IN); +} + +static void mb_chan_enable_int(struct slimpro_mbox_chan *mb_chan, u32 mask) +{ + u32 val = readl(mb_chan->reg + REG_DB_STATMASK); + + val &= ~mask; + writel(val, mb_chan->reg + REG_DB_STATMASK); +} + +static void mb_chan_disable_int(struct slimpro_mbox_chan *mb_chan, u32 mask) +{ + u32 val = readl(mb_chan->reg + REG_DB_STATMASK); + + val |= mask; + writel(val, mb_chan->reg + REG_DB_STATMASK); +} + +static int mb_chan_status_ack(struct slimpro_mbox_chan *mb_chan) +{ + u32 val = readl(mb_chan->reg + REG_DB_STAT); + + if (val & MBOX_STATUS_ACK_MASK) { + writel(MBOX_STATUS_ACK_MASK, mb_chan->reg + REG_DB_STAT); + return 1; + } + return 0; +} + +static int mb_chan_status_avail(struct slimpro_mbox_chan *mb_chan) +{ + u32 val = readl(mb_chan->reg + REG_DB_STAT); + + if (val & MBOX_STATUS_AVAIL_MASK) { + mb_chan_recv_msg(mb_chan); + writel(MBOX_STATUS_AVAIL_MASK, mb_chan->reg + REG_DB_STAT); + return 1; + } + return 0; +} + +static irqreturn_t slimpro_mbox_irq(int irq, void *id) +{ + struct slimpro_mbox_chan *mb_chan = id; + + if (mb_chan_status_ack(mb_chan)) + mbox_chan_txdone(mb_chan->chan, 0); + + if (mb_chan_status_avail(mb_chan)) + mbox_chan_received_data(mb_chan->chan, mb_chan->rx_msg); + + return IRQ_HANDLED; +} + +static int slimpro_mbox_send_data(struct mbox_chan *chan, void *msg) +{ + struct slimpro_mbox_chan *mb_chan = + (struct slimpro_mbox_chan *)chan->con_priv; + + mb_chan_send_msg(mb_chan, msg); + return 0; +} + +static int slimpro_mbox_startup(struct mbox_chan *chan) +{ + struct slimpro_mbox_chan *mb_chan = + (struct slimpro_mbox_chan *)chan->con_priv; + int rc; + + rc = devm_request_irq(mb_chan->dev, mb_chan->irq, slimpro_mbox_irq, 0, + MBOX_CON_NAME, mb_chan); + if (unlikely(rc)) { + dev_err(mb_chan->dev, "failed to register mailbox interrupt %d\n", + mb_chan->irq); + return rc; + } + + /* Enable HW interrupt */ + writel(MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK, + mb_chan->reg + REG_DB_STAT); + mb_chan_enable_int(mb_chan, MBOX_STATUS_ACK_MASK | + MBOX_STATUS_AVAIL_MASK); + return 0; +} + +static void slimpro_mbox_shutdown(struct mbox_chan *chan) +{ + struct slimpro_mbox_chan *mb_chan = + (struct slimpro_mbox_chan *)chan->con_priv; + + mb_chan_disable_int(mb_chan, MBOX_STATUS_ACK_MASK | + MBOX_STATUS_AVAIL_MASK); + devm_free_irq(mb_chan->dev, mb_chan->irq, mb_chan); +} + +static struct mbox_chan_ops slimpro_mbox_ops = { + .send_data = slimpro_mbox_send_data, + .startup = slimpro_mbox_startup, + .shutdown = slimpro_mbox_shutdown, +}; + +static int __init slimpro_mbox_probe(struct platform_device *pdev) +{ + struct slimpro_mbox *ctx; + struct resource *regs; + void __iomem *mb_base; + int rc; + int i; + + ctx = devm_kzalloc(&pdev->dev, sizeof(struct slimpro_mbox), GFP_KERNEL); + if (IS_ERR(ctx)) + return PTR_ERR(ctx); + + platform_set_drvdata(pdev, ctx); + + regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); + mb_base = devm_ioremap(&pdev->dev, regs->start, resource_size(regs)); + if (IS_ERR(mb_base)) + return PTR_ERR(mb_base); + + /* Setup mailbox links */ + for (i = 0; i < MBOX_CNT; i++) { + ctx->mc[i].irq = platform_get_irq(pdev, i); + if (ctx->mc[i].irq < 0) { + dev_err(&pdev->dev, "no IRQ at index %d\n", + ctx->mc[i].irq); + return -ENODEV; + } + + ctx->mc[i].dev = &pdev->dev; + ctx->mc[i].reg = mb_base + i * MBOX_REG_SET_OFFSET; + ctx->mc[i].id = i; + ctx->mc[i].chan = &ctx->chans[i]; + ctx->chans[i].con_priv = &ctx->mc[i]; + } + + /* Setup mailbox controller */ + ctx->mb_ctrl.dev = &pdev->dev; + ctx->mb_ctrl.chans = ctx->chans; + ctx->mb_ctrl.txdone_irq = true; + ctx->mb_ctrl.ops = &slimpro_mbox_ops; + ctx->mb_ctrl.num_chans = MBOX_CNT; + + rc = mbox_controller_register(&ctx->mb_ctrl); + if (rc) { + dev_err(&pdev->dev, + "APM X-Gene SLIMpro MailBox register failed:%d\n", rc); + return rc; + } + + dev_info(&pdev->dev, "APM X-Gene SLIMpro MailBox registered\n"); + return 0; +} + +static int slimpro_mbox_remove(struct platform_device *pdev) +{ + struct slimpro_mbox *smb = platform_get_drvdata(pdev); + + mbox_controller_unregister(&smb->mb_ctrl); + return 0; +} + +static const struct of_device_id slimpro_of_match[] = { + {.compatible = "apm,xgene-slimpro-mbox" }, + { }, +}; +MODULE_DEVICE_TABLE(of, slimpro_of_match); + +#ifdef CONFIG_ACPI +static const struct acpi_device_id slimpro_acpi_ids[] = { + {"APMC0D01", 0}, + {} +}; +MODULE_DEVICE_TABLE(acpi, slimpro_acpi_ids); +#endif + +static struct platform_driver slimpro_mbox_driver = { + .probe = slimpro_mbox_probe, + .remove = slimpro_mbox_remove, + .driver = { + .name = "xgene-slimpro-mbox", + .owner = THIS_MODULE, + .of_match_table = of_match_ptr(slimpro_of_match), + .acpi_match_table = ACPI_PTR(slimpro_acpi_ids) + }, +}; + +module_platform_driver(slimpro_mbox_driver); + +MODULE_DESCRIPTION("APM X-Gene SLIMpro Mailbox Driver"); +MODULE_LICENSE("GPL"); -- 1.9.1 ^ permalink raw reply related [flat|nested] 95+ messages in thread
* [PATCH v3 1/3] mailbox: Add support for APM X-Gene platform mailbox driver 2015-11-09 18:05 ` Duc Dang @ 2015-11-20 11:47 ` Jassi Brar -1 siblings, 0 replies; 95+ messages in thread From: Jassi Brar @ 2015-11-20 11:47 UTC (permalink / raw) To: linux-arm-kernel On Mon, Nov 9, 2015 at 11:35 PM, Duc Dang <dhdang@apm.com> wrote: > X-Gene mailbox controller provides 8 mailbox channels, with > each channel has a dedicated interrupt line. > > [dhdang: rebase over 4.3-rc5, some minor changes to > address comment in v2 patch set] > Do you want this to go into git logs? > Signed-off-by: Feng Kan <fkan@apm.com> > Signed-off-by: Duc Dang <dhdang@apm.com> > --- here is the right place for any history. And it is good practice to specify whatever changes were made from last revision. > + > +struct slimpro_mbox_chan { > + struct device *dev; > + struct mbox_chan *chan; > + void __iomem *reg; > + int id; > You don't seem to really need 'id'. > + > +static void mb_chan_enable_int(struct slimpro_mbox_chan *mb_chan, u32 mask) > +{ > + u32 val = readl(mb_chan->reg + REG_DB_STATMASK); > + > + val &= ~mask; > + writel(val, mb_chan->reg + REG_DB_STATMASK); > +} > + > +static void mb_chan_disable_int(struct slimpro_mbox_chan *mb_chan, u32 mask) > +{ > + u32 val = readl(mb_chan->reg + REG_DB_STATMASK); > + > + val |= mask; > + writel(val, mb_chan->reg + REG_DB_STATMASK); > +} > + These 2 functions are called just once. And do what other drivers usually inline. Wouldn't it be better to directly set & clear the bit when needed? > +static int slimpro_mbox_send_data(struct mbox_chan *chan, void *msg) > +{ > + struct slimpro_mbox_chan *mb_chan = > + (struct slimpro_mbox_chan *)chan->con_priv; > + You don't need to typecast a void pointer. Here and elsewhere. > + > + /* Setup mailbox links */ > + for (i = 0; i < MBOX_CNT; i++) { > + ctx->mc[i].irq = platform_get_irq(pdev, i); > You expect every platform to provide exactly 'MBOX_CNT' irqs and they must be different (because you don't 'SHARE' when you request). Usually developers relax either of the conditions. > +static struct platform_driver slimpro_mbox_driver = { > + .probe = slimpro_mbox_probe, > + .remove = slimpro_mbox_remove, > + .driver = { > + .name = "xgene-slimpro-mbox", > + .owner = THIS_MODULE, > No need to set .owner. Cheers. ^ permalink raw reply [flat|nested] 95+ messages in thread
* Re: [PATCH v3 1/3] mailbox: Add support for APM X-Gene platform mailbox driver @ 2015-11-20 11:47 ` Jassi Brar 0 siblings, 0 replies; 95+ messages in thread From: Jassi Brar @ 2015-11-20 11:47 UTC (permalink / raw) To: Duc Dang Cc: Paul Bolle, Devicetree List, linux-arm-kernel@lists.infradead.org, Linux Kernel Mailing List, patches, Feng Kan On Mon, Nov 9, 2015 at 11:35 PM, Duc Dang <dhdang@apm.com> wrote: > X-Gene mailbox controller provides 8 mailbox channels, with > each channel has a dedicated interrupt line. > > [dhdang: rebase over 4.3-rc5, some minor changes to > address comment in v2 patch set] > Do you want this to go into git logs? > Signed-off-by: Feng Kan <fkan@apm.com> > Signed-off-by: Duc Dang <dhdang@apm.com> > --- here is the right place for any history. And it is good practice to specify whatever changes were made from last revision. > + > +struct slimpro_mbox_chan { > + struct device *dev; > + struct mbox_chan *chan; > + void __iomem *reg; > + int id; > You don't seem to really need 'id'. > + > +static void mb_chan_enable_int(struct slimpro_mbox_chan *mb_chan, u32 mask) > +{ > + u32 val = readl(mb_chan->reg + REG_DB_STATMASK); > + > + val &= ~mask; > + writel(val, mb_chan->reg + REG_DB_STATMASK); > +} > + > +static void mb_chan_disable_int(struct slimpro_mbox_chan *mb_chan, u32 mask) > +{ > + u32 val = readl(mb_chan->reg + REG_DB_STATMASK); > + > + val |= mask; > + writel(val, mb_chan->reg + REG_DB_STATMASK); > +} > + These 2 functions are called just once. And do what other drivers usually inline. Wouldn't it be better to directly set & clear the bit when needed? > +static int slimpro_mbox_send_data(struct mbox_chan *chan, void *msg) > +{ > + struct slimpro_mbox_chan *mb_chan = > + (struct slimpro_mbox_chan *)chan->con_priv; > + You don't need to typecast a void pointer. Here and elsewhere. > + > + /* Setup mailbox links */ > + for (i = 0; i < MBOX_CNT; i++) { > + ctx->mc[i].irq = platform_get_irq(pdev, i); > You expect every platform to provide exactly 'MBOX_CNT' irqs and they must be different (because you don't 'SHARE' when you request). Usually developers relax either of the conditions. > +static struct platform_driver slimpro_mbox_driver = { > + .probe = slimpro_mbox_probe, > + .remove = slimpro_mbox_remove, > + .driver = { > + .name = "xgene-slimpro-mbox", > + .owner = THIS_MODULE, > No need to set .owner. Cheers. ^ permalink raw reply [flat|nested] 95+ messages in thread
* [PATCH v3 1/3] mailbox: Add support for APM X-Gene platform mailbox driver 2015-11-20 11:47 ` Jassi Brar @ 2015-12-07 9:29 ` Duc Dang -1 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2015-12-07 9:29 UTC (permalink / raw) To: linux-arm-kernel On Fri, Nov 20, 2015 at 3:47 AM, Jassi Brar <jassisinghbrar@gmail.com> wrote: > On Mon, Nov 9, 2015 at 11:35 PM, Duc Dang <dhdang@apm.com> wrote: >> X-Gene mailbox controller provides 8 mailbox channels, with >> each channel has a dedicated interrupt line. >> >> [dhdang: rebase over 4.3-rc5, some minor changes to >> address comment in v2 patch set] >> > Do you want this to go into git logs? Yes. I will also rebase the patch set to v4.4-rc1. > >> Signed-off-by: Feng Kan <fkan@apm.com> >> Signed-off-by: Duc Dang <dhdang@apm.com> >> --- > here is the right place for any history. And it is good practice to > specify whatever changes were made from last revision. I will add change log into this section in next version of the patch. > > >> + >> +struct slimpro_mbox_chan { >> + struct device *dev; >> + struct mbox_chan *chan; >> + void __iomem *reg; >> + int id; >> > You don't seem to really need 'id'. I will remove 'id'. > > >> + >> +static void mb_chan_enable_int(struct slimpro_mbox_chan *mb_chan, u32 mask) >> +{ >> + u32 val = readl(mb_chan->reg + REG_DB_STATMASK); >> + >> + val &= ~mask; >> + writel(val, mb_chan->reg + REG_DB_STATMASK); >> +} >> + >> +static void mb_chan_disable_int(struct slimpro_mbox_chan *mb_chan, u32 mask) >> +{ >> + u32 val = readl(mb_chan->reg + REG_DB_STATMASK); >> + >> + val |= mask; >> + writel(val, mb_chan->reg + REG_DB_STATMASK); >> +} >> + > These 2 functions are called just once. And do what other drivers > usually inline. Wouldn't it be better to directly set & clear the bit > when needed? I will fold these 2 functions into their callers and then get rid of them. > >> +static int slimpro_mbox_send_data(struct mbox_chan *chan, void *msg) >> +{ >> + struct slimpro_mbox_chan *mb_chan = >> + (struct slimpro_mbox_chan *)chan->con_priv; >> + > You don't need to typecast a void pointer. Here and elsewhere. I will remove all the typecast of a void pointer in the driver. > > >> + >> + /* Setup mailbox links */ >> + for (i = 0; i < MBOX_CNT; i++) { >> + ctx->mc[i].irq = platform_get_irq(pdev, i); >> > You expect every platform to provide exactly 'MBOX_CNT' irqs and they > must be different (because you don't 'SHARE' when you request). > Usually developers relax either of the conditions. I will relax the MBOX_CNT irqs restriction: Platform can provide less than MBOX_CNT irqs, which also means less than MBOX_CNT mailbox channels. > > >> +static struct platform_driver slimpro_mbox_driver = { >> + .probe = slimpro_mbox_probe, >> + .remove = slimpro_mbox_remove, >> + .driver = { >> + .name = "xgene-slimpro-mbox", >> + .owner = THIS_MODULE, >> > No need to set .owner. I will remove it. > > Cheers. Regards, Duc Dang. ^ permalink raw reply [flat|nested] 95+ messages in thread
* Re: [PATCH v3 1/3] mailbox: Add support for APM X-Gene platform mailbox driver @ 2015-12-07 9:29 ` Duc Dang 0 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2015-12-07 9:29 UTC (permalink / raw) To: Jassi Brar Cc: Paul Bolle, Devicetree List, linux-arm-kernel@lists.infradead.org, Linux Kernel Mailing List, patches, Feng Kan On Fri, Nov 20, 2015 at 3:47 AM, Jassi Brar <jassisinghbrar@gmail.com> wrote: > On Mon, Nov 9, 2015 at 11:35 PM, Duc Dang <dhdang@apm.com> wrote: >> X-Gene mailbox controller provides 8 mailbox channels, with >> each channel has a dedicated interrupt line. >> >> [dhdang: rebase over 4.3-rc5, some minor changes to >> address comment in v2 patch set] >> > Do you want this to go into git logs? Yes. I will also rebase the patch set to v4.4-rc1. > >> Signed-off-by: Feng Kan <fkan@apm.com> >> Signed-off-by: Duc Dang <dhdang@apm.com> >> --- > here is the right place for any history. And it is good practice to > specify whatever changes were made from last revision. I will add change log into this section in next version of the patch. > > >> + >> +struct slimpro_mbox_chan { >> + struct device *dev; >> + struct mbox_chan *chan; >> + void __iomem *reg; >> + int id; >> > You don't seem to really need 'id'. I will remove 'id'. > > >> + >> +static void mb_chan_enable_int(struct slimpro_mbox_chan *mb_chan, u32 mask) >> +{ >> + u32 val = readl(mb_chan->reg + REG_DB_STATMASK); >> + >> + val &= ~mask; >> + writel(val, mb_chan->reg + REG_DB_STATMASK); >> +} >> + >> +static void mb_chan_disable_int(struct slimpro_mbox_chan *mb_chan, u32 mask) >> +{ >> + u32 val = readl(mb_chan->reg + REG_DB_STATMASK); >> + >> + val |= mask; >> + writel(val, mb_chan->reg + REG_DB_STATMASK); >> +} >> + > These 2 functions are called just once. And do what other drivers > usually inline. Wouldn't it be better to directly set & clear the bit > when needed? I will fold these 2 functions into their callers and then get rid of them. > >> +static int slimpro_mbox_send_data(struct mbox_chan *chan, void *msg) >> +{ >> + struct slimpro_mbox_chan *mb_chan = >> + (struct slimpro_mbox_chan *)chan->con_priv; >> + > You don't need to typecast a void pointer. Here and elsewhere. I will remove all the typecast of a void pointer in the driver. > > >> + >> + /* Setup mailbox links */ >> + for (i = 0; i < MBOX_CNT; i++) { >> + ctx->mc[i].irq = platform_get_irq(pdev, i); >> > You expect every platform to provide exactly 'MBOX_CNT' irqs and they > must be different (because you don't 'SHARE' when you request). > Usually developers relax either of the conditions. I will relax the MBOX_CNT irqs restriction: Platform can provide less than MBOX_CNT irqs, which also means less than MBOX_CNT mailbox channels. > > >> +static struct platform_driver slimpro_mbox_driver = { >> + .probe = slimpro_mbox_probe, >> + .remove = slimpro_mbox_remove, >> + .driver = { >> + .name = "xgene-slimpro-mbox", >> + .owner = THIS_MODULE, >> > No need to set .owner. I will remove it. > > Cheers. Regards, Duc Dang. ^ permalink raw reply [flat|nested] 95+ messages in thread
* [PATCH v4 0/3] mailbox: Add APM X-Gene platform mailbox driver 2015-11-20 11:47 ` Jassi Brar @ 2016-01-16 2:57 ` Duc Dang -1 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2016-01-16 2:57 UTC (permalink / raw) To: linux-arm-kernel APM X-Gene SoC has a mailbox controller that provides communication mechanism for X-Gene Arm64 cores to communicate with X-Gene SoC's Cortex M3 (SLIMpro) processor. X-Gene mailbox controller provides 8 mailbox channels, with each channel has a dedicated interrupt line. Changes since v3: - Rebase over v4.4 - Remove 'id' in slimpro_mbox_chan structure - Remove functions that are only called once and fold them into the other callers - Remove void* pointer type cast - Relax the number of mailbox IRQs condition - Fix error and address comment in documentation (xgene-slimpro-mailbox.txt) Changes since v2: - Rebase Feng's patch set over v4.3-rc5 - Remove uneccessary 'inline' in function definition - Use module_platform_driver instead of subsys_initcall - Minor coding stype clean up Changes since v1: - Add ACPI support - Use defines for reg offset Duc Dang (3): mailbox: Add support for APM X-Gene platform mailbox driver Documentation: mailbox: Add APM X-Gene SLIMpro mailbox dts documentation arm64: dts: mailbox device tree node for APM X-Gene platform. .../bindings/mailbox/xgene-slimpro-mailbox.txt | 35 +++ arch/arm64/boot/dts/apm/apm-storm.dtsi | 14 ++ drivers/mailbox/Kconfig | 9 + drivers/mailbox/Makefile | 2 + drivers/mailbox/mailbox-xgene-slimpro.c | 265 +++++++++++++++++++++ 5 files changed, 325 insertions(+) create mode 100644 Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt create mode 100644 drivers/mailbox/mailbox-xgene-slimpro.c -- 1.9.1 ^ permalink raw reply [flat|nested] 95+ messages in thread
* [PATCH v4 0/3] mailbox: Add APM X-Gene platform mailbox driver @ 2016-01-16 2:57 ` Duc Dang 0 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2016-01-16 2:57 UTC (permalink / raw) To: Jassi Brar, Paul Bolle, Rob Herring Cc: devicetree, linux-arm-kernel, linux-kernel, patches, Duc Dang APM X-Gene SoC has a mailbox controller that provides communication mechanism for X-Gene Arm64 cores to communicate with X-Gene SoC's Cortex M3 (SLIMpro) processor. X-Gene mailbox controller provides 8 mailbox channels, with each channel has a dedicated interrupt line. Changes since v3: - Rebase over v4.4 - Remove 'id' in slimpro_mbox_chan structure - Remove functions that are only called once and fold them into the other callers - Remove void* pointer type cast - Relax the number of mailbox IRQs condition - Fix error and address comment in documentation (xgene-slimpro-mailbox.txt) Changes since v2: - Rebase Feng's patch set over v4.3-rc5 - Remove uneccessary 'inline' in function definition - Use module_platform_driver instead of subsys_initcall - Minor coding stype clean up Changes since v1: - Add ACPI support - Use defines for reg offset Duc Dang (3): mailbox: Add support for APM X-Gene platform mailbox driver Documentation: mailbox: Add APM X-Gene SLIMpro mailbox dts documentation arm64: dts: mailbox device tree node for APM X-Gene platform. .../bindings/mailbox/xgene-slimpro-mailbox.txt | 35 +++ arch/arm64/boot/dts/apm/apm-storm.dtsi | 14 ++ drivers/mailbox/Kconfig | 9 + drivers/mailbox/Makefile | 2 + drivers/mailbox/mailbox-xgene-slimpro.c | 265 +++++++++++++++++++++ 5 files changed, 325 insertions(+) create mode 100644 Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt create mode 100644 drivers/mailbox/mailbox-xgene-slimpro.c -- 1.9.1 ^ permalink raw reply [flat|nested] 95+ messages in thread
* [PATCH v4 1/3] mailbox: Add support for APM X-Gene platform mailbox driver 2016-01-16 2:57 ` Duc Dang (?) @ 2016-01-16 2:57 ` Duc Dang -1 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2016-01-16 2:57 UTC (permalink / raw) To: linux-arm-kernel X-Gene mailbox controller provides 8 mailbox channels, with each channel has a dedicated interrupt line. Signed-off-by: Feng Kan <fkan@apm.com> Signed-off-by: Duc Dang <dhdang@apm.com> --- Changes since v3: - Rebase over v4.4 - Remove 'id' in slimpro_mbox_chan structure - Remove small functions that are only called once and fold them into the other callers - Remove void* pointer type cast - Relax the number of mailbox IRQs condition - Use subsys_initcall to guarantee mailbox driver will be registered before any other dependent driver is loaded. drivers/mailbox/Kconfig | 9 ++ drivers/mailbox/Makefile | 2 + drivers/mailbox/mailbox-xgene-slimpro.c | 265 ++++++++++++++++++++++++++++++++ 3 files changed, 276 insertions(+) create mode 100644 drivers/mailbox/mailbox-xgene-slimpro.c diff --git a/drivers/mailbox/Kconfig b/drivers/mailbox/Kconfig index 546d05f..678e434 100644 --- a/drivers/mailbox/Kconfig +++ b/drivers/mailbox/Kconfig @@ -85,4 +85,13 @@ config MAILBOX_TEST Test client to help with testing new Controller driver implementations. +config XGENE_SLIMPRO_MBOX + tristate "APM SoC X-Gene SLIMpro Mailbox Controller" + depends on ARCH_XGENE + help + An implementation of the APM X-Gene Interprocessor Communication + Mailbox (IPCM) between the ARM 64-bit cores and SLIMpro controller. + It is used to send short messages between ARM64-bit cores and + the SLIMpro Management Engine, primarily for PM. Say Y here if you + want to use the APM X-Gene SLIMpro IPCM support. endif diff --git a/drivers/mailbox/Makefile b/drivers/mailbox/Makefile index 92435ef..b602ef8 100644 --- a/drivers/mailbox/Makefile +++ b/drivers/mailbox/Makefile @@ -17,3 +17,5 @@ obj-$(CONFIG_ALTERA_MBOX) += mailbox-altera.o obj-$(CONFIG_BCM2835_MBOX) += bcm2835-mailbox.o obj-$(CONFIG_STI_MBOX) += mailbox-sti.o + +obj-$(CONFIG_XGENE_SLIMPRO_MBOX) += mailbox-xgene-slimpro.o diff --git a/drivers/mailbox/mailbox-xgene-slimpro.c b/drivers/mailbox/mailbox-xgene-slimpro.c new file mode 100644 index 0000000..a7b0c9e --- /dev/null +++ b/drivers/mailbox/mailbox-xgene-slimpro.c @@ -0,0 +1,265 @@ +/* + * APM X-Gene SLIMpro MailBox Driver + * + * Copyright (c) 2015, Applied Micro Circuits Corporation + * Author: Feng Kan fkan at apm.com + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <http://www.gnu.org/licenses/>. + * + */ +#include <linux/acpi.h> +#include <linux/delay.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/mailbox_controller.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/spinlock.h> + +#define MBOX_CON_NAME "slimpro-mbox" +#define MBOX_REG_SET_OFFSET 0x1000 +#define MBOX_CNT 8 +#define MBOX_STATUS_AVAIL_MASK BIT(16) +#define MBOX_STATUS_ACK_MASK BIT(0) + +/* Configuration and Status Registers */ +#define REG_DB_IN 0x00 +#define REG_DB_DIN0 0x04 +#define REG_DB_DIN1 0x08 +#define REG_DB_OUT 0x10 +#define REG_DB_DOUT0 0x14 +#define REG_DB_DOUT1 0x18 +#define REG_DB_STAT 0x20 +#define REG_DB_STATMASK 0x24 + +struct slimpro_mbox_chan { + struct device *dev; + struct mbox_chan *chan; + void __iomem *reg; + int irq; + u32 rx_msg[3]; +}; + +struct slimpro_mbox { + struct mbox_controller mb_ctrl; + struct slimpro_mbox_chan mc[MBOX_CNT]; + struct mbox_chan chans[MBOX_CNT]; +}; + +static void mb_chan_send_msg(struct slimpro_mbox_chan *mb_chan, u32 *msg) +{ + writel(msg[1], mb_chan->reg + REG_DB_DOUT0); + writel(msg[2], mb_chan->reg + REG_DB_DOUT1); + writel(msg[0], mb_chan->reg + REG_DB_OUT); +} + +static void mb_chan_recv_msg(struct slimpro_mbox_chan *mb_chan) +{ + mb_chan->rx_msg[1] = readl(mb_chan->reg + REG_DB_DIN0); + mb_chan->rx_msg[2] = readl(mb_chan->reg + REG_DB_DIN1); + mb_chan->rx_msg[0] = readl(mb_chan->reg + REG_DB_IN); +} + +static int mb_chan_status_ack(struct slimpro_mbox_chan *mb_chan) +{ + u32 val = readl(mb_chan->reg + REG_DB_STAT); + + if (val & MBOX_STATUS_ACK_MASK) { + writel(MBOX_STATUS_ACK_MASK, mb_chan->reg + REG_DB_STAT); + return 1; + } + return 0; +} + +static int mb_chan_status_avail(struct slimpro_mbox_chan *mb_chan) +{ + u32 val = readl(mb_chan->reg + REG_DB_STAT); + + if (val & MBOX_STATUS_AVAIL_MASK) { + mb_chan_recv_msg(mb_chan); + writel(MBOX_STATUS_AVAIL_MASK, mb_chan->reg + REG_DB_STAT); + return 1; + } + return 0; +} + +static irqreturn_t slimpro_mbox_irq(int irq, void *id) +{ + struct slimpro_mbox_chan *mb_chan = id; + + if (mb_chan_status_ack(mb_chan)) + mbox_chan_txdone(mb_chan->chan, 0); + + if (mb_chan_status_avail(mb_chan)) + mbox_chan_received_data(mb_chan->chan, mb_chan->rx_msg); + + return IRQ_HANDLED; +} + +static int slimpro_mbox_send_data(struct mbox_chan *chan, void *msg) +{ + struct slimpro_mbox_chan *mb_chan = chan->con_priv; + + mb_chan_send_msg(mb_chan, msg); + return 0; +} + +static int slimpro_mbox_startup(struct mbox_chan *chan) +{ + struct slimpro_mbox_chan *mb_chan = chan->con_priv; + int rc; + u32 val; + + rc = devm_request_irq(mb_chan->dev, mb_chan->irq, slimpro_mbox_irq, 0, + MBOX_CON_NAME, mb_chan); + if (unlikely(rc)) { + dev_err(mb_chan->dev, "failed to register mailbox interrupt %d\n", + mb_chan->irq); + return rc; + } + + /* Enable HW interrupt */ + writel(MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK, + mb_chan->reg + REG_DB_STAT); + /* Unmask doorbell status interrupt */ + val = readl(mb_chan->reg + REG_DB_STATMASK); + val &= ~(MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK); + writel(val, mb_chan->reg + REG_DB_STATMASK); + + return 0; +} + +static void slimpro_mbox_shutdown(struct mbox_chan *chan) +{ + struct slimpro_mbox_chan *mb_chan = chan->con_priv; + u32 val; + + /* Mask doorbell status interrupt */ + val = readl(mb_chan->reg + REG_DB_STATMASK); + val |= (MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK); + writel(val, mb_chan->reg + REG_DB_STATMASK); + + devm_free_irq(mb_chan->dev, mb_chan->irq, mb_chan); +} + +static struct mbox_chan_ops slimpro_mbox_ops = { + .send_data = slimpro_mbox_send_data, + .startup = slimpro_mbox_startup, + .shutdown = slimpro_mbox_shutdown, +}; + +static int __init slimpro_mbox_probe(struct platform_device *pdev) +{ + struct slimpro_mbox *ctx; + struct resource *regs; + void __iomem *mb_base; + int rc; + int i; + + ctx = devm_kzalloc(&pdev->dev, sizeof(struct slimpro_mbox), GFP_KERNEL); + if (IS_ERR(ctx)) + return PTR_ERR(ctx); + + platform_set_drvdata(pdev, ctx); + + regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); + mb_base = devm_ioremap(&pdev->dev, regs->start, resource_size(regs)); + if (IS_ERR(mb_base)) + return PTR_ERR(mb_base); + + /* Setup mailbox links */ + for (i = 0; i < MBOX_CNT; i++) { + ctx->mc[i].irq = platform_get_irq(pdev, i); + if (ctx->mc[i].irq < 0) { + if (i == 0) { + dev_err(&pdev->dev, "no available IRQ\n"); + return -EINVAL; + } + dev_info(&pdev->dev, "no IRQ at index %d\n", + ctx->mc[i].irq); + break; + } + + ctx->mc[i].dev = &pdev->dev; + ctx->mc[i].reg = mb_base + i * MBOX_REG_SET_OFFSET; + ctx->mc[i].chan = &ctx->chans[i]; + ctx->chans[i].con_priv = &ctx->mc[i]; + } + + /* Setup mailbox controller */ + ctx->mb_ctrl.dev = &pdev->dev; + ctx->mb_ctrl.chans = ctx->chans; + ctx->mb_ctrl.txdone_irq = true; + ctx->mb_ctrl.ops = &slimpro_mbox_ops; + ctx->mb_ctrl.num_chans = i; + + rc = mbox_controller_register(&ctx->mb_ctrl); + if (rc) { + dev_err(&pdev->dev, + "APM X-Gene SLIMpro MailBox register failed:%d\n", rc); + return rc; + } + + dev_info(&pdev->dev, "APM X-Gene SLIMpro MailBox registered\n"); + return 0; +} + +static int slimpro_mbox_remove(struct platform_device *pdev) +{ + struct slimpro_mbox *smb = platform_get_drvdata(pdev); + + mbox_controller_unregister(&smb->mb_ctrl); + return 0; +} + +static const struct of_device_id slimpro_of_match[] = { + {.compatible = "apm,xgene-slimpro-mbox" }, + { }, +}; +MODULE_DEVICE_TABLE(of, slimpro_of_match); + +#ifdef CONFIG_ACPI +static const struct acpi_device_id slimpro_acpi_ids[] = { + {"APMC0D01", 0}, + {} +}; +MODULE_DEVICE_TABLE(acpi, slimpro_acpi_ids); +#endif + +static struct platform_driver slimpro_mbox_driver = { + .probe = slimpro_mbox_probe, + .remove = slimpro_mbox_remove, + .driver = { + .name = "xgene-slimpro-mbox", + .of_match_table = of_match_ptr(slimpro_of_match), + .acpi_match_table = ACPI_PTR(slimpro_acpi_ids) + }, +}; + +static int __init slimpro_mbox_init(void) +{ + return platform_driver_register(&slimpro_mbox_driver); +} + +static void __exit slimpro_mbox_exit(void) +{ + platform_driver_unregister(&slimpro_mbox_driver); +} + +subsys_initcall(slimpro_mbox_init); +module_exit(slimpro_mbox_exit); + +MODULE_DESCRIPTION("APM X-Gene SLIMpro Mailbox Driver"); +MODULE_LICENSE("GPL"); -- 1.9.1 ^ permalink raw reply related [flat|nested] 95+ messages in thread
* [PATCH v4 1/3] mailbox: Add support for APM X-Gene platform mailbox driver @ 2016-01-16 2:57 ` Duc Dang 0 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2016-01-16 2:57 UTC (permalink / raw) To: Jassi Brar, Paul Bolle, Rob Herring Cc: devicetree, linux-arm-kernel, linux-kernel, patches, Duc Dang, Feng Kan X-Gene mailbox controller provides 8 mailbox channels, with each channel has a dedicated interrupt line. Signed-off-by: Feng Kan <fkan@apm.com> Signed-off-by: Duc Dang <dhdang@apm.com> --- Changes since v3: - Rebase over v4.4 - Remove 'id' in slimpro_mbox_chan structure - Remove small functions that are only called once and fold them into the other callers - Remove void* pointer type cast - Relax the number of mailbox IRQs condition - Use subsys_initcall to guarantee mailbox driver will be registered before any other dependent driver is loaded. drivers/mailbox/Kconfig | 9 ++ drivers/mailbox/Makefile | 2 + drivers/mailbox/mailbox-xgene-slimpro.c | 265 ++++++++++++++++++++++++++++++++ 3 files changed, 276 insertions(+) create mode 100644 drivers/mailbox/mailbox-xgene-slimpro.c diff --git a/drivers/mailbox/Kconfig b/drivers/mailbox/Kconfig index 546d05f..678e434 100644 --- a/drivers/mailbox/Kconfig +++ b/drivers/mailbox/Kconfig @@ -85,4 +85,13 @@ config MAILBOX_TEST Test client to help with testing new Controller driver implementations. +config XGENE_SLIMPRO_MBOX + tristate "APM SoC X-Gene SLIMpro Mailbox Controller" + depends on ARCH_XGENE + help + An implementation of the APM X-Gene Interprocessor Communication + Mailbox (IPCM) between the ARM 64-bit cores and SLIMpro controller. + It is used to send short messages between ARM64-bit cores and + the SLIMpro Management Engine, primarily for PM. Say Y here if you + want to use the APM X-Gene SLIMpro IPCM support. endif diff --git a/drivers/mailbox/Makefile b/drivers/mailbox/Makefile index 92435ef..b602ef8 100644 --- a/drivers/mailbox/Makefile +++ b/drivers/mailbox/Makefile @@ -17,3 +17,5 @@ obj-$(CONFIG_ALTERA_MBOX) += mailbox-altera.o obj-$(CONFIG_BCM2835_MBOX) += bcm2835-mailbox.o obj-$(CONFIG_STI_MBOX) += mailbox-sti.o + +obj-$(CONFIG_XGENE_SLIMPRO_MBOX) += mailbox-xgene-slimpro.o diff --git a/drivers/mailbox/mailbox-xgene-slimpro.c b/drivers/mailbox/mailbox-xgene-slimpro.c new file mode 100644 index 0000000..a7b0c9e --- /dev/null +++ b/drivers/mailbox/mailbox-xgene-slimpro.c @@ -0,0 +1,265 @@ +/* + * APM X-Gene SLIMpro MailBox Driver + * + * Copyright (c) 2015, Applied Micro Circuits Corporation + * Author: Feng Kan fkan@apm.com + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <http://www.gnu.org/licenses/>. + * + */ +#include <linux/acpi.h> +#include <linux/delay.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/mailbox_controller.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/spinlock.h> + +#define MBOX_CON_NAME "slimpro-mbox" +#define MBOX_REG_SET_OFFSET 0x1000 +#define MBOX_CNT 8 +#define MBOX_STATUS_AVAIL_MASK BIT(16) +#define MBOX_STATUS_ACK_MASK BIT(0) + +/* Configuration and Status Registers */ +#define REG_DB_IN 0x00 +#define REG_DB_DIN0 0x04 +#define REG_DB_DIN1 0x08 +#define REG_DB_OUT 0x10 +#define REG_DB_DOUT0 0x14 +#define REG_DB_DOUT1 0x18 +#define REG_DB_STAT 0x20 +#define REG_DB_STATMASK 0x24 + +struct slimpro_mbox_chan { + struct device *dev; + struct mbox_chan *chan; + void __iomem *reg; + int irq; + u32 rx_msg[3]; +}; + +struct slimpro_mbox { + struct mbox_controller mb_ctrl; + struct slimpro_mbox_chan mc[MBOX_CNT]; + struct mbox_chan chans[MBOX_CNT]; +}; + +static void mb_chan_send_msg(struct slimpro_mbox_chan *mb_chan, u32 *msg) +{ + writel(msg[1], mb_chan->reg + REG_DB_DOUT0); + writel(msg[2], mb_chan->reg + REG_DB_DOUT1); + writel(msg[0], mb_chan->reg + REG_DB_OUT); +} + +static void mb_chan_recv_msg(struct slimpro_mbox_chan *mb_chan) +{ + mb_chan->rx_msg[1] = readl(mb_chan->reg + REG_DB_DIN0); + mb_chan->rx_msg[2] = readl(mb_chan->reg + REG_DB_DIN1); + mb_chan->rx_msg[0] = readl(mb_chan->reg + REG_DB_IN); +} + +static int mb_chan_status_ack(struct slimpro_mbox_chan *mb_chan) +{ + u32 val = readl(mb_chan->reg + REG_DB_STAT); + + if (val & MBOX_STATUS_ACK_MASK) { + writel(MBOX_STATUS_ACK_MASK, mb_chan->reg + REG_DB_STAT); + return 1; + } + return 0; +} + +static int mb_chan_status_avail(struct slimpro_mbox_chan *mb_chan) +{ + u32 val = readl(mb_chan->reg + REG_DB_STAT); + + if (val & MBOX_STATUS_AVAIL_MASK) { + mb_chan_recv_msg(mb_chan); + writel(MBOX_STATUS_AVAIL_MASK, mb_chan->reg + REG_DB_STAT); + return 1; + } + return 0; +} + +static irqreturn_t slimpro_mbox_irq(int irq, void *id) +{ + struct slimpro_mbox_chan *mb_chan = id; + + if (mb_chan_status_ack(mb_chan)) + mbox_chan_txdone(mb_chan->chan, 0); + + if (mb_chan_status_avail(mb_chan)) + mbox_chan_received_data(mb_chan->chan, mb_chan->rx_msg); + + return IRQ_HANDLED; +} + +static int slimpro_mbox_send_data(struct mbox_chan *chan, void *msg) +{ + struct slimpro_mbox_chan *mb_chan = chan->con_priv; + + mb_chan_send_msg(mb_chan, msg); + return 0; +} + +static int slimpro_mbox_startup(struct mbox_chan *chan) +{ + struct slimpro_mbox_chan *mb_chan = chan->con_priv; + int rc; + u32 val; + + rc = devm_request_irq(mb_chan->dev, mb_chan->irq, slimpro_mbox_irq, 0, + MBOX_CON_NAME, mb_chan); + if (unlikely(rc)) { + dev_err(mb_chan->dev, "failed to register mailbox interrupt %d\n", + mb_chan->irq); + return rc; + } + + /* Enable HW interrupt */ + writel(MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK, + mb_chan->reg + REG_DB_STAT); + /* Unmask doorbell status interrupt */ + val = readl(mb_chan->reg + REG_DB_STATMASK); + val &= ~(MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK); + writel(val, mb_chan->reg + REG_DB_STATMASK); + + return 0; +} + +static void slimpro_mbox_shutdown(struct mbox_chan *chan) +{ + struct slimpro_mbox_chan *mb_chan = chan->con_priv; + u32 val; + + /* Mask doorbell status interrupt */ + val = readl(mb_chan->reg + REG_DB_STATMASK); + val |= (MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK); + writel(val, mb_chan->reg + REG_DB_STATMASK); + + devm_free_irq(mb_chan->dev, mb_chan->irq, mb_chan); +} + +static struct mbox_chan_ops slimpro_mbox_ops = { + .send_data = slimpro_mbox_send_data, + .startup = slimpro_mbox_startup, + .shutdown = slimpro_mbox_shutdown, +}; + +static int __init slimpro_mbox_probe(struct platform_device *pdev) +{ + struct slimpro_mbox *ctx; + struct resource *regs; + void __iomem *mb_base; + int rc; + int i; + + ctx = devm_kzalloc(&pdev->dev, sizeof(struct slimpro_mbox), GFP_KERNEL); + if (IS_ERR(ctx)) + return PTR_ERR(ctx); + + platform_set_drvdata(pdev, ctx); + + regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); + mb_base = devm_ioremap(&pdev->dev, regs->start, resource_size(regs)); + if (IS_ERR(mb_base)) + return PTR_ERR(mb_base); + + /* Setup mailbox links */ + for (i = 0; i < MBOX_CNT; i++) { + ctx->mc[i].irq = platform_get_irq(pdev, i); + if (ctx->mc[i].irq < 0) { + if (i == 0) { + dev_err(&pdev->dev, "no available IRQ\n"); + return -EINVAL; + } + dev_info(&pdev->dev, "no IRQ at index %d\n", + ctx->mc[i].irq); + break; + } + + ctx->mc[i].dev = &pdev->dev; + ctx->mc[i].reg = mb_base + i * MBOX_REG_SET_OFFSET; + ctx->mc[i].chan = &ctx->chans[i]; + ctx->chans[i].con_priv = &ctx->mc[i]; + } + + /* Setup mailbox controller */ + ctx->mb_ctrl.dev = &pdev->dev; + ctx->mb_ctrl.chans = ctx->chans; + ctx->mb_ctrl.txdone_irq = true; + ctx->mb_ctrl.ops = &slimpro_mbox_ops; + ctx->mb_ctrl.num_chans = i; + + rc = mbox_controller_register(&ctx->mb_ctrl); + if (rc) { + dev_err(&pdev->dev, + "APM X-Gene SLIMpro MailBox register failed:%d\n", rc); + return rc; + } + + dev_info(&pdev->dev, "APM X-Gene SLIMpro MailBox registered\n"); + return 0; +} + +static int slimpro_mbox_remove(struct platform_device *pdev) +{ + struct slimpro_mbox *smb = platform_get_drvdata(pdev); + + mbox_controller_unregister(&smb->mb_ctrl); + return 0; +} + +static const struct of_device_id slimpro_of_match[] = { + {.compatible = "apm,xgene-slimpro-mbox" }, + { }, +}; +MODULE_DEVICE_TABLE(of, slimpro_of_match); + +#ifdef CONFIG_ACPI +static const struct acpi_device_id slimpro_acpi_ids[] = { + {"APMC0D01", 0}, + {} +}; +MODULE_DEVICE_TABLE(acpi, slimpro_acpi_ids); +#endif + +static struct platform_driver slimpro_mbox_driver = { + .probe = slimpro_mbox_probe, + .remove = slimpro_mbox_remove, + .driver = { + .name = "xgene-slimpro-mbox", + .of_match_table = of_match_ptr(slimpro_of_match), + .acpi_match_table = ACPI_PTR(slimpro_acpi_ids) + }, +}; + +static int __init slimpro_mbox_init(void) +{ + return platform_driver_register(&slimpro_mbox_driver); +} + +static void __exit slimpro_mbox_exit(void) +{ + platform_driver_unregister(&slimpro_mbox_driver); +} + +subsys_initcall(slimpro_mbox_init); +module_exit(slimpro_mbox_exit); + +MODULE_DESCRIPTION("APM X-Gene SLIMpro Mailbox Driver"); +MODULE_LICENSE("GPL"); -- 1.9.1 ^ permalink raw reply related [flat|nested] 95+ messages in thread
* [PATCH v4 1/3] mailbox: Add support for APM X-Gene platform mailbox driver @ 2016-01-16 2:57 ` Duc Dang 0 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2016-01-16 2:57 UTC (permalink / raw) To: Jassi Brar, Paul Bolle, Rob Herring Cc: devicetree, Feng Kan, Duc Dang, patches, linux-kernel, linux-arm-kernel X-Gene mailbox controller provides 8 mailbox channels, with each channel has a dedicated interrupt line. Signed-off-by: Feng Kan <fkan@apm.com> Signed-off-by: Duc Dang <dhdang@apm.com> --- Changes since v3: - Rebase over v4.4 - Remove 'id' in slimpro_mbox_chan structure - Remove small functions that are only called once and fold them into the other callers - Remove void* pointer type cast - Relax the number of mailbox IRQs condition - Use subsys_initcall to guarantee mailbox driver will be registered before any other dependent driver is loaded. drivers/mailbox/Kconfig | 9 ++ drivers/mailbox/Makefile | 2 + drivers/mailbox/mailbox-xgene-slimpro.c | 265 ++++++++++++++++++++++++++++++++ 3 files changed, 276 insertions(+) create mode 100644 drivers/mailbox/mailbox-xgene-slimpro.c diff --git a/drivers/mailbox/Kconfig b/drivers/mailbox/Kconfig index 546d05f..678e434 100644 --- a/drivers/mailbox/Kconfig +++ b/drivers/mailbox/Kconfig @@ -85,4 +85,13 @@ config MAILBOX_TEST Test client to help with testing new Controller driver implementations. +config XGENE_SLIMPRO_MBOX + tristate "APM SoC X-Gene SLIMpro Mailbox Controller" + depends on ARCH_XGENE + help + An implementation of the APM X-Gene Interprocessor Communication + Mailbox (IPCM) between the ARM 64-bit cores and SLIMpro controller. + It is used to send short messages between ARM64-bit cores and + the SLIMpro Management Engine, primarily for PM. Say Y here if you + want to use the APM X-Gene SLIMpro IPCM support. endif diff --git a/drivers/mailbox/Makefile b/drivers/mailbox/Makefile index 92435ef..b602ef8 100644 --- a/drivers/mailbox/Makefile +++ b/drivers/mailbox/Makefile @@ -17,3 +17,5 @@ obj-$(CONFIG_ALTERA_MBOX) += mailbox-altera.o obj-$(CONFIG_BCM2835_MBOX) += bcm2835-mailbox.o obj-$(CONFIG_STI_MBOX) += mailbox-sti.o + +obj-$(CONFIG_XGENE_SLIMPRO_MBOX) += mailbox-xgene-slimpro.o diff --git a/drivers/mailbox/mailbox-xgene-slimpro.c b/drivers/mailbox/mailbox-xgene-slimpro.c new file mode 100644 index 0000000..a7b0c9e --- /dev/null +++ b/drivers/mailbox/mailbox-xgene-slimpro.c @@ -0,0 +1,265 @@ +/* + * APM X-Gene SLIMpro MailBox Driver + * + * Copyright (c) 2015, Applied Micro Circuits Corporation + * Author: Feng Kan fkan@apm.com + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <http://www.gnu.org/licenses/>. + * + */ +#include <linux/acpi.h> +#include <linux/delay.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/mailbox_controller.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/spinlock.h> + +#define MBOX_CON_NAME "slimpro-mbox" +#define MBOX_REG_SET_OFFSET 0x1000 +#define MBOX_CNT 8 +#define MBOX_STATUS_AVAIL_MASK BIT(16) +#define MBOX_STATUS_ACK_MASK BIT(0) + +/* Configuration and Status Registers */ +#define REG_DB_IN 0x00 +#define REG_DB_DIN0 0x04 +#define REG_DB_DIN1 0x08 +#define REG_DB_OUT 0x10 +#define REG_DB_DOUT0 0x14 +#define REG_DB_DOUT1 0x18 +#define REG_DB_STAT 0x20 +#define REG_DB_STATMASK 0x24 + +struct slimpro_mbox_chan { + struct device *dev; + struct mbox_chan *chan; + void __iomem *reg; + int irq; + u32 rx_msg[3]; +}; + +struct slimpro_mbox { + struct mbox_controller mb_ctrl; + struct slimpro_mbox_chan mc[MBOX_CNT]; + struct mbox_chan chans[MBOX_CNT]; +}; + +static void mb_chan_send_msg(struct slimpro_mbox_chan *mb_chan, u32 *msg) +{ + writel(msg[1], mb_chan->reg + REG_DB_DOUT0); + writel(msg[2], mb_chan->reg + REG_DB_DOUT1); + writel(msg[0], mb_chan->reg + REG_DB_OUT); +} + +static void mb_chan_recv_msg(struct slimpro_mbox_chan *mb_chan) +{ + mb_chan->rx_msg[1] = readl(mb_chan->reg + REG_DB_DIN0); + mb_chan->rx_msg[2] = readl(mb_chan->reg + REG_DB_DIN1); + mb_chan->rx_msg[0] = readl(mb_chan->reg + REG_DB_IN); +} + +static int mb_chan_status_ack(struct slimpro_mbox_chan *mb_chan) +{ + u32 val = readl(mb_chan->reg + REG_DB_STAT); + + if (val & MBOX_STATUS_ACK_MASK) { + writel(MBOX_STATUS_ACK_MASK, mb_chan->reg + REG_DB_STAT); + return 1; + } + return 0; +} + +static int mb_chan_status_avail(struct slimpro_mbox_chan *mb_chan) +{ + u32 val = readl(mb_chan->reg + REG_DB_STAT); + + if (val & MBOX_STATUS_AVAIL_MASK) { + mb_chan_recv_msg(mb_chan); + writel(MBOX_STATUS_AVAIL_MASK, mb_chan->reg + REG_DB_STAT); + return 1; + } + return 0; +} + +static irqreturn_t slimpro_mbox_irq(int irq, void *id) +{ + struct slimpro_mbox_chan *mb_chan = id; + + if (mb_chan_status_ack(mb_chan)) + mbox_chan_txdone(mb_chan->chan, 0); + + if (mb_chan_status_avail(mb_chan)) + mbox_chan_received_data(mb_chan->chan, mb_chan->rx_msg); + + return IRQ_HANDLED; +} + +static int slimpro_mbox_send_data(struct mbox_chan *chan, void *msg) +{ + struct slimpro_mbox_chan *mb_chan = chan->con_priv; + + mb_chan_send_msg(mb_chan, msg); + return 0; +} + +static int slimpro_mbox_startup(struct mbox_chan *chan) +{ + struct slimpro_mbox_chan *mb_chan = chan->con_priv; + int rc; + u32 val; + + rc = devm_request_irq(mb_chan->dev, mb_chan->irq, slimpro_mbox_irq, 0, + MBOX_CON_NAME, mb_chan); + if (unlikely(rc)) { + dev_err(mb_chan->dev, "failed to register mailbox interrupt %d\n", + mb_chan->irq); + return rc; + } + + /* Enable HW interrupt */ + writel(MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK, + mb_chan->reg + REG_DB_STAT); + /* Unmask doorbell status interrupt */ + val = readl(mb_chan->reg + REG_DB_STATMASK); + val &= ~(MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK); + writel(val, mb_chan->reg + REG_DB_STATMASK); + + return 0; +} + +static void slimpro_mbox_shutdown(struct mbox_chan *chan) +{ + struct slimpro_mbox_chan *mb_chan = chan->con_priv; + u32 val; + + /* Mask doorbell status interrupt */ + val = readl(mb_chan->reg + REG_DB_STATMASK); + val |= (MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK); + writel(val, mb_chan->reg + REG_DB_STATMASK); + + devm_free_irq(mb_chan->dev, mb_chan->irq, mb_chan); +} + +static struct mbox_chan_ops slimpro_mbox_ops = { + .send_data = slimpro_mbox_send_data, + .startup = slimpro_mbox_startup, + .shutdown = slimpro_mbox_shutdown, +}; + +static int __init slimpro_mbox_probe(struct platform_device *pdev) +{ + struct slimpro_mbox *ctx; + struct resource *regs; + void __iomem *mb_base; + int rc; + int i; + + ctx = devm_kzalloc(&pdev->dev, sizeof(struct slimpro_mbox), GFP_KERNEL); + if (IS_ERR(ctx)) + return PTR_ERR(ctx); + + platform_set_drvdata(pdev, ctx); + + regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); + mb_base = devm_ioremap(&pdev->dev, regs->start, resource_size(regs)); + if (IS_ERR(mb_base)) + return PTR_ERR(mb_base); + + /* Setup mailbox links */ + for (i = 0; i < MBOX_CNT; i++) { + ctx->mc[i].irq = platform_get_irq(pdev, i); + if (ctx->mc[i].irq < 0) { + if (i == 0) { + dev_err(&pdev->dev, "no available IRQ\n"); + return -EINVAL; + } + dev_info(&pdev->dev, "no IRQ at index %d\n", + ctx->mc[i].irq); + break; + } + + ctx->mc[i].dev = &pdev->dev; + ctx->mc[i].reg = mb_base + i * MBOX_REG_SET_OFFSET; + ctx->mc[i].chan = &ctx->chans[i]; + ctx->chans[i].con_priv = &ctx->mc[i]; + } + + /* Setup mailbox controller */ + ctx->mb_ctrl.dev = &pdev->dev; + ctx->mb_ctrl.chans = ctx->chans; + ctx->mb_ctrl.txdone_irq = true; + ctx->mb_ctrl.ops = &slimpro_mbox_ops; + ctx->mb_ctrl.num_chans = i; + + rc = mbox_controller_register(&ctx->mb_ctrl); + if (rc) { + dev_err(&pdev->dev, + "APM X-Gene SLIMpro MailBox register failed:%d\n", rc); + return rc; + } + + dev_info(&pdev->dev, "APM X-Gene SLIMpro MailBox registered\n"); + return 0; +} + +static int slimpro_mbox_remove(struct platform_device *pdev) +{ + struct slimpro_mbox *smb = platform_get_drvdata(pdev); + + mbox_controller_unregister(&smb->mb_ctrl); + return 0; +} + +static const struct of_device_id slimpro_of_match[] = { + {.compatible = "apm,xgene-slimpro-mbox" }, + { }, +}; +MODULE_DEVICE_TABLE(of, slimpro_of_match); + +#ifdef CONFIG_ACPI +static const struct acpi_device_id slimpro_acpi_ids[] = { + {"APMC0D01", 0}, + {} +}; +MODULE_DEVICE_TABLE(acpi, slimpro_acpi_ids); +#endif + +static struct platform_driver slimpro_mbox_driver = { + .probe = slimpro_mbox_probe, + .remove = slimpro_mbox_remove, + .driver = { + .name = "xgene-slimpro-mbox", + .of_match_table = of_match_ptr(slimpro_of_match), + .acpi_match_table = ACPI_PTR(slimpro_acpi_ids) + }, +}; + +static int __init slimpro_mbox_init(void) +{ + return platform_driver_register(&slimpro_mbox_driver); +} + +static void __exit slimpro_mbox_exit(void) +{ + platform_driver_unregister(&slimpro_mbox_driver); +} + +subsys_initcall(slimpro_mbox_init); +module_exit(slimpro_mbox_exit); + +MODULE_DESCRIPTION("APM X-Gene SLIMpro Mailbox Driver"); +MODULE_LICENSE("GPL"); -- 1.9.1 ^ permalink raw reply related [flat|nested] 95+ messages in thread
* [PATCH v4 1/3] mailbox: Add support for APM X-Gene platform mailbox driver @ 2016-01-16 12:31 ` kbuild test robot 0 siblings, 0 replies; 95+ messages in thread From: kbuild test robot @ 2016-01-16 12:31 UTC (permalink / raw) To: linux-arm-kernel Hi Duc, [auto build test WARNING on robh/for-next] [also build test WARNING on v4.4 next-20160115] [if your patch is applied to the wrong git tree, please drop us a note to help improving the system] url: https://github.com/0day-ci/linux/commits/Duc-Dang/mailbox-Add-support-for-APM-X-Gene-platform-mailbox-driver/20160116-110535 base: https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux for-next config: arm64-allyesconfig (attached as .config) reproduce: wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree make.cross ARCH=arm64 All warnings (new ones prefixed by >>): >> WARNING: vmlinux.o(.data+0xfd6260): Section mismatch in reference from the variable slimpro_mbox_driver to the variable .init.text:$x The variable slimpro_mbox_driver references the variable __init $x If the reference is valid then annotate the variable with or __refdata (see linux/init.h) or name the variable: --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation -------------- next part -------------- A non-text attachment was scrubbed... Name: .config.gz Type: application/octet-stream Size: 46958 bytes Desc: not available URL: <http://lists.infradead.org/pipermail/linux-arm-kernel/attachments/20160116/c613e700/attachment-0001.obj> ^ permalink raw reply [flat|nested] 95+ messages in thread
* Re: [PATCH v4 1/3] mailbox: Add support for APM X-Gene platform mailbox driver @ 2016-01-16 12:31 ` kbuild test robot 0 siblings, 0 replies; 95+ messages in thread From: kbuild test robot @ 2016-01-16 12:31 UTC (permalink / raw) To: Duc Dang Cc: kbuild-all, Jassi Brar, Paul Bolle, Rob Herring, devicetree, linux-arm-kernel, linux-kernel, patches, Duc Dang, Feng Kan [-- Attachment #1: Type: text/plain, Size: 1245 bytes --] Hi Duc, [auto build test WARNING on robh/for-next] [also build test WARNING on v4.4 next-20160115] [if your patch is applied to the wrong git tree, please drop us a note to help improving the system] url: https://github.com/0day-ci/linux/commits/Duc-Dang/mailbox-Add-support-for-APM-X-Gene-platform-mailbox-driver/20160116-110535 base: https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux for-next config: arm64-allyesconfig (attached as .config) reproduce: wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree make.cross ARCH=arm64 All warnings (new ones prefixed by >>): >> WARNING: vmlinux.o(.data+0xfd6260): Section mismatch in reference from the variable slimpro_mbox_driver to the variable .init.text:$x The variable slimpro_mbox_driver references the variable __init $x If the reference is valid then annotate the variable with or __refdata (see linux/init.h) or name the variable: --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation [-- Attachment #2: .config.gz --] [-- Type: application/octet-stream, Size: 46958 bytes --] ^ permalink raw reply [flat|nested] 95+ messages in thread
* Re: [PATCH v4 1/3] mailbox: Add support for APM X-Gene platform mailbox driver @ 2016-01-16 12:31 ` kbuild test robot 0 siblings, 0 replies; 95+ messages in thread From: kbuild test robot @ 2016-01-16 12:31 UTC (permalink / raw) Cc: kbuild-all-JC7UmRfGjtg, Jassi Brar, Paul Bolle, Rob Herring, devicetree-u79uwXL29TY76Z2rM5mHXA, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r, linux-kernel-u79uwXL29TY76Z2rM5mHXA, patches-qTEPVZfXA3Y, Duc Dang, Feng Kan [-- Attachment #1: Type: text/plain, Size: 1245 bytes --] Hi Duc, [auto build test WARNING on robh/for-next] [also build test WARNING on v4.4 next-20160115] [if your patch is applied to the wrong git tree, please drop us a note to help improving the system] url: https://github.com/0day-ci/linux/commits/Duc-Dang/mailbox-Add-support-for-APM-X-Gene-platform-mailbox-driver/20160116-110535 base: https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux for-next config: arm64-allyesconfig (attached as .config) reproduce: wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree make.cross ARCH=arm64 All warnings (new ones prefixed by >>): >> WARNING: vmlinux.o(.data+0xfd6260): Section mismatch in reference from the variable slimpro_mbox_driver to the variable .init.text:$x The variable slimpro_mbox_driver references the variable __init $x If the reference is valid then annotate the variable with or __refdata (see linux/init.h) or name the variable: --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation [-- Attachment #2: .config.gz --] [-- Type: application/octet-stream, Size: 46958 bytes --] ^ permalink raw reply [flat|nested] 95+ messages in thread
* [PATCH v4 1/3] mailbox: Add support for APM X-Gene platform mailbox driver 2016-01-16 12:31 ` kbuild test robot @ 2016-01-22 23:05 ` Duc Dang -1 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2016-01-22 23:05 UTC (permalink / raw) To: linux-arm-kernel On Sat, Jan 16, 2016 at 4:31 AM, kbuild test robot <lkp@intel.com> wrote: > Hi Duc, > > [auto build test WARNING on robh/for-next] > [also build test WARNING on v4.4 next-20160115] > [if your patch is applied to the wrong git tree, please drop us a note to help improving the system] > > url: https://github.com/0day-ci/linux/commits/Duc-Dang/mailbox-Add-support-for-APM-X-Gene-platform-mailbox-driver/20160116-110535 > base: https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux for-next > config: arm64-allyesconfig (attached as .config) > reproduce: > wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross > chmod +x ~/bin/make.cross > # save the attached .config to linux build tree > make.cross ARCH=arm64 > > All warnings (new ones prefixed by >>): > >>> WARNING: vmlinux.o(.data+0xfd6260): Section mismatch in reference from the variable slimpro_mbox_driver to the variable .init.text:$x > The variable slimpro_mbox_driver references > the variable __init $x > If the reference is valid then annotate the > variable with or __refdata (see linux/init.h) or name the variable: I fixed the build warning, will post and updated after further comment from Jassi. I did not catch it before posting my patch because I did not compile with CONFIG_DEBUG_SECTION_MISMATCH=y. I will make sure I have this option enabled for my build process going forward. Regards, Duc Dang. > > > --- > 0-DAY kernel test infrastructure Open Source Technology Center > https://lists.01.org/pipermail/kbuild-all Intel Corporation ^ permalink raw reply [flat|nested] 95+ messages in thread
* Re: [PATCH v4 1/3] mailbox: Add support for APM X-Gene platform mailbox driver @ 2016-01-22 23:05 ` Duc Dang 0 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2016-01-22 23:05 UTC (permalink / raw) To: kbuild test robot Cc: kbuild-all, Jassi Brar, Paul Bolle, Rob Herring, Devicetree List, linux-arm, Linux Kernel Mailing List, patches, Feng Kan On Sat, Jan 16, 2016 at 4:31 AM, kbuild test robot <lkp@intel.com> wrote: > Hi Duc, > > [auto build test WARNING on robh/for-next] > [also build test WARNING on v4.4 next-20160115] > [if your patch is applied to the wrong git tree, please drop us a note to help improving the system] > > url: https://github.com/0day-ci/linux/commits/Duc-Dang/mailbox-Add-support-for-APM-X-Gene-platform-mailbox-driver/20160116-110535 > base: https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux for-next > config: arm64-allyesconfig (attached as .config) > reproduce: > wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross > chmod +x ~/bin/make.cross > # save the attached .config to linux build tree > make.cross ARCH=arm64 > > All warnings (new ones prefixed by >>): > >>> WARNING: vmlinux.o(.data+0xfd6260): Section mismatch in reference from the variable slimpro_mbox_driver to the variable .init.text:$x > The variable slimpro_mbox_driver references > the variable __init $x > If the reference is valid then annotate the > variable with or __refdata (see linux/init.h) or name the variable: I fixed the build warning, will post and updated after further comment from Jassi. I did not catch it before posting my patch because I did not compile with CONFIG_DEBUG_SECTION_MISMATCH=y. I will make sure I have this option enabled for my build process going forward. Regards, Duc Dang. > > > --- > 0-DAY kernel test infrastructure Open Source Technology Center > https://lists.01.org/pipermail/kbuild-all Intel Corporation ^ permalink raw reply [flat|nested] 95+ messages in thread
* [PATCH v4 1/3] mailbox: Add support for APM X-Gene platform mailbox driver @ 2016-02-01 19:38 ` Duc Dang 0 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2016-02-01 19:38 UTC (permalink / raw) To: linux-arm-kernel Hi Jassi, On Fri, Jan 15, 2016 at 6:57 PM, Duc Dang <dhdang@apm.com> wrote: > X-Gene mailbox controller provides 8 mailbox channels, with > each channel has a dedicated interrupt line. Did you have a chance to look into this version 4 of my mail-box patch? Regards, Duc Dang. > > Signed-off-by: Feng Kan <fkan@apm.com> > Signed-off-by: Duc Dang <dhdang@apm.com> > --- > Changes since v3: > - Rebase over v4.4 > - Remove 'id' in slimpro_mbox_chan structure > - Remove small functions that are only called once > and fold them into the other callers > - Remove void* pointer type cast > - Relax the number of mailbox IRQs condition > - Use subsys_initcall to guarantee mailbox driver > will be registered before any other dependent driver > is loaded. > > drivers/mailbox/Kconfig | 9 ++ > drivers/mailbox/Makefile | 2 + > drivers/mailbox/mailbox-xgene-slimpro.c | 265 ++++++++++++++++++++++++++++++++ > 3 files changed, 276 insertions(+) > create mode 100644 drivers/mailbox/mailbox-xgene-slimpro.c > > diff --git a/drivers/mailbox/Kconfig b/drivers/mailbox/Kconfig > index 546d05f..678e434 100644 > --- a/drivers/mailbox/Kconfig > +++ b/drivers/mailbox/Kconfig > @@ -85,4 +85,13 @@ config MAILBOX_TEST > Test client to help with testing new Controller driver > implementations. > > +config XGENE_SLIMPRO_MBOX > + tristate "APM SoC X-Gene SLIMpro Mailbox Controller" > + depends on ARCH_XGENE > + help > + An implementation of the APM X-Gene Interprocessor Communication > + Mailbox (IPCM) between the ARM 64-bit cores and SLIMpro controller. > + It is used to send short messages between ARM64-bit cores and > + the SLIMpro Management Engine, primarily for PM. Say Y here if you > + want to use the APM X-Gene SLIMpro IPCM support. > endif > diff --git a/drivers/mailbox/Makefile b/drivers/mailbox/Makefile > index 92435ef..b602ef8 100644 > --- a/drivers/mailbox/Makefile > +++ b/drivers/mailbox/Makefile > @@ -17,3 +17,5 @@ obj-$(CONFIG_ALTERA_MBOX) += mailbox-altera.o > obj-$(CONFIG_BCM2835_MBOX) += bcm2835-mailbox.o > > obj-$(CONFIG_STI_MBOX) += mailbox-sti.o > + > +obj-$(CONFIG_XGENE_SLIMPRO_MBOX) += mailbox-xgene-slimpro.o > diff --git a/drivers/mailbox/mailbox-xgene-slimpro.c b/drivers/mailbox/mailbox-xgene-slimpro.c > new file mode 100644 > index 0000000..a7b0c9e > --- /dev/null > +++ b/drivers/mailbox/mailbox-xgene-slimpro.c > @@ -0,0 +1,265 @@ > +/* > + * APM X-Gene SLIMpro MailBox Driver > + * > + * Copyright (c) 2015, Applied Micro Circuits Corporation > + * Author: Feng Kan fkan at apm.com > + * > + * This program is free software; you can redistribute it and/or > + * modify it under the terms of the GNU General Public License as > + * published by the Free Software Foundation; either version 2 of > + * the License, or (at your option) any later version. > + * > + * This program is distributed in the hope that it will be useful, > + * but WITHOUT ANY WARRANTY; without even the implied warranty of > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > + * GNU General Public License for more details. > + * > + * You should have received a copy of the GNU General Public License > + * along with this program; if not, see <http://www.gnu.org/licenses/>. > + * > + */ > +#include <linux/acpi.h> > +#include <linux/delay.h> > +#include <linux/interrupt.h> > +#include <linux/io.h> > +#include <linux/mailbox_controller.h> > +#include <linux/module.h> > +#include <linux/of.h> > +#include <linux/platform_device.h> > +#include <linux/spinlock.h> > + > +#define MBOX_CON_NAME "slimpro-mbox" > +#define MBOX_REG_SET_OFFSET 0x1000 > +#define MBOX_CNT 8 > +#define MBOX_STATUS_AVAIL_MASK BIT(16) > +#define MBOX_STATUS_ACK_MASK BIT(0) > + > +/* Configuration and Status Registers */ > +#define REG_DB_IN 0x00 > +#define REG_DB_DIN0 0x04 > +#define REG_DB_DIN1 0x08 > +#define REG_DB_OUT 0x10 > +#define REG_DB_DOUT0 0x14 > +#define REG_DB_DOUT1 0x18 > +#define REG_DB_STAT 0x20 > +#define REG_DB_STATMASK 0x24 > + > +struct slimpro_mbox_chan { > + struct device *dev; > + struct mbox_chan *chan; > + void __iomem *reg; > + int irq; > + u32 rx_msg[3]; > +}; > + > +struct slimpro_mbox { > + struct mbox_controller mb_ctrl; > + struct slimpro_mbox_chan mc[MBOX_CNT]; > + struct mbox_chan chans[MBOX_CNT]; > +}; > + > +static void mb_chan_send_msg(struct slimpro_mbox_chan *mb_chan, u32 *msg) > +{ > + writel(msg[1], mb_chan->reg + REG_DB_DOUT0); > + writel(msg[2], mb_chan->reg + REG_DB_DOUT1); > + writel(msg[0], mb_chan->reg + REG_DB_OUT); > +} > + > +static void mb_chan_recv_msg(struct slimpro_mbox_chan *mb_chan) > +{ > + mb_chan->rx_msg[1] = readl(mb_chan->reg + REG_DB_DIN0); > + mb_chan->rx_msg[2] = readl(mb_chan->reg + REG_DB_DIN1); > + mb_chan->rx_msg[0] = readl(mb_chan->reg + REG_DB_IN); > +} > + > +static int mb_chan_status_ack(struct slimpro_mbox_chan *mb_chan) > +{ > + u32 val = readl(mb_chan->reg + REG_DB_STAT); > + > + if (val & MBOX_STATUS_ACK_MASK) { > + writel(MBOX_STATUS_ACK_MASK, mb_chan->reg + REG_DB_STAT); > + return 1; > + } > + return 0; > +} > + > +static int mb_chan_status_avail(struct slimpro_mbox_chan *mb_chan) > +{ > + u32 val = readl(mb_chan->reg + REG_DB_STAT); > + > + if (val & MBOX_STATUS_AVAIL_MASK) { > + mb_chan_recv_msg(mb_chan); > + writel(MBOX_STATUS_AVAIL_MASK, mb_chan->reg + REG_DB_STAT); > + return 1; > + } > + return 0; > +} > + > +static irqreturn_t slimpro_mbox_irq(int irq, void *id) > +{ > + struct slimpro_mbox_chan *mb_chan = id; > + > + if (mb_chan_status_ack(mb_chan)) > + mbox_chan_txdone(mb_chan->chan, 0); > + > + if (mb_chan_status_avail(mb_chan)) > + mbox_chan_received_data(mb_chan->chan, mb_chan->rx_msg); > + > + return IRQ_HANDLED; > +} > + > +static int slimpro_mbox_send_data(struct mbox_chan *chan, void *msg) > +{ > + struct slimpro_mbox_chan *mb_chan = chan->con_priv; > + > + mb_chan_send_msg(mb_chan, msg); > + return 0; > +} > + > +static int slimpro_mbox_startup(struct mbox_chan *chan) > +{ > + struct slimpro_mbox_chan *mb_chan = chan->con_priv; > + int rc; > + u32 val; > + > + rc = devm_request_irq(mb_chan->dev, mb_chan->irq, slimpro_mbox_irq, 0, > + MBOX_CON_NAME, mb_chan); > + if (unlikely(rc)) { > + dev_err(mb_chan->dev, "failed to register mailbox interrupt %d\n", > + mb_chan->irq); > + return rc; > + } > + > + /* Enable HW interrupt */ > + writel(MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK, > + mb_chan->reg + REG_DB_STAT); > + /* Unmask doorbell status interrupt */ > + val = readl(mb_chan->reg + REG_DB_STATMASK); > + val &= ~(MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK); > + writel(val, mb_chan->reg + REG_DB_STATMASK); > + > + return 0; > +} > + > +static void slimpro_mbox_shutdown(struct mbox_chan *chan) > +{ > + struct slimpro_mbox_chan *mb_chan = chan->con_priv; > + u32 val; > + > + /* Mask doorbell status interrupt */ > + val = readl(mb_chan->reg + REG_DB_STATMASK); > + val |= (MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK); > + writel(val, mb_chan->reg + REG_DB_STATMASK); > + > + devm_free_irq(mb_chan->dev, mb_chan->irq, mb_chan); > +} > + > +static struct mbox_chan_ops slimpro_mbox_ops = { > + .send_data = slimpro_mbox_send_data, > + .startup = slimpro_mbox_startup, > + .shutdown = slimpro_mbox_shutdown, > +}; > + > +static int __init slimpro_mbox_probe(struct platform_device *pdev) > +{ > + struct slimpro_mbox *ctx; > + struct resource *regs; > + void __iomem *mb_base; > + int rc; > + int i; > + > + ctx = devm_kzalloc(&pdev->dev, sizeof(struct slimpro_mbox), GFP_KERNEL); > + if (IS_ERR(ctx)) > + return PTR_ERR(ctx); > + > + platform_set_drvdata(pdev, ctx); > + > + regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); > + mb_base = devm_ioremap(&pdev->dev, regs->start, resource_size(regs)); > + if (IS_ERR(mb_base)) > + return PTR_ERR(mb_base); > + > + /* Setup mailbox links */ > + for (i = 0; i < MBOX_CNT; i++) { > + ctx->mc[i].irq = platform_get_irq(pdev, i); > + if (ctx->mc[i].irq < 0) { > + if (i == 0) { > + dev_err(&pdev->dev, "no available IRQ\n"); > + return -EINVAL; > + } > + dev_info(&pdev->dev, "no IRQ at index %d\n", > + ctx->mc[i].irq); > + break; > + } > + > + ctx->mc[i].dev = &pdev->dev; > + ctx->mc[i].reg = mb_base + i * MBOX_REG_SET_OFFSET; > + ctx->mc[i].chan = &ctx->chans[i]; > + ctx->chans[i].con_priv = &ctx->mc[i]; > + } > + > + /* Setup mailbox controller */ > + ctx->mb_ctrl.dev = &pdev->dev; > + ctx->mb_ctrl.chans = ctx->chans; > + ctx->mb_ctrl.txdone_irq = true; > + ctx->mb_ctrl.ops = &slimpro_mbox_ops; > + ctx->mb_ctrl.num_chans = i; > + > + rc = mbox_controller_register(&ctx->mb_ctrl); > + if (rc) { > + dev_err(&pdev->dev, > + "APM X-Gene SLIMpro MailBox register failed:%d\n", rc); > + return rc; > + } > + > + dev_info(&pdev->dev, "APM X-Gene SLIMpro MailBox registered\n"); > + return 0; > +} > + > +static int slimpro_mbox_remove(struct platform_device *pdev) > +{ > + struct slimpro_mbox *smb = platform_get_drvdata(pdev); > + > + mbox_controller_unregister(&smb->mb_ctrl); > + return 0; > +} > + > +static const struct of_device_id slimpro_of_match[] = { > + {.compatible = "apm,xgene-slimpro-mbox" }, > + { }, > +}; > +MODULE_DEVICE_TABLE(of, slimpro_of_match); > + > +#ifdef CONFIG_ACPI > +static const struct acpi_device_id slimpro_acpi_ids[] = { > + {"APMC0D01", 0}, > + {} > +}; > +MODULE_DEVICE_TABLE(acpi, slimpro_acpi_ids); > +#endif > + > +static struct platform_driver slimpro_mbox_driver = { > + .probe = slimpro_mbox_probe, > + .remove = slimpro_mbox_remove, > + .driver = { > + .name = "xgene-slimpro-mbox", > + .of_match_table = of_match_ptr(slimpro_of_match), > + .acpi_match_table = ACPI_PTR(slimpro_acpi_ids) > + }, > +}; > + > +static int __init slimpro_mbox_init(void) > +{ > + return platform_driver_register(&slimpro_mbox_driver); > +} > + > +static void __exit slimpro_mbox_exit(void) > +{ > + platform_driver_unregister(&slimpro_mbox_driver); > +} > + > +subsys_initcall(slimpro_mbox_init); > +module_exit(slimpro_mbox_exit); > + > +MODULE_DESCRIPTION("APM X-Gene SLIMpro Mailbox Driver"); > +MODULE_LICENSE("GPL"); > -- > 1.9.1 > ^ permalink raw reply [flat|nested] 95+ messages in thread
* Re: [PATCH v4 1/3] mailbox: Add support for APM X-Gene platform mailbox driver @ 2016-02-01 19:38 ` Duc Dang 0 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2016-02-01 19:38 UTC (permalink / raw) To: Jassi Brar, Paul Bolle, Rob Herring Cc: Devicetree List, linux-arm, Linux Kernel Mailing List, patches, Duc Dang, Feng Kan Hi Jassi, On Fri, Jan 15, 2016 at 6:57 PM, Duc Dang <dhdang@apm.com> wrote: > X-Gene mailbox controller provides 8 mailbox channels, with > each channel has a dedicated interrupt line. Did you have a chance to look into this version 4 of my mail-box patch? Regards, Duc Dang. > > Signed-off-by: Feng Kan <fkan@apm.com> > Signed-off-by: Duc Dang <dhdang@apm.com> > --- > Changes since v3: > - Rebase over v4.4 > - Remove 'id' in slimpro_mbox_chan structure > - Remove small functions that are only called once > and fold them into the other callers > - Remove void* pointer type cast > - Relax the number of mailbox IRQs condition > - Use subsys_initcall to guarantee mailbox driver > will be registered before any other dependent driver > is loaded. > > drivers/mailbox/Kconfig | 9 ++ > drivers/mailbox/Makefile | 2 + > drivers/mailbox/mailbox-xgene-slimpro.c | 265 ++++++++++++++++++++++++++++++++ > 3 files changed, 276 insertions(+) > create mode 100644 drivers/mailbox/mailbox-xgene-slimpro.c > > diff --git a/drivers/mailbox/Kconfig b/drivers/mailbox/Kconfig > index 546d05f..678e434 100644 > --- a/drivers/mailbox/Kconfig > +++ b/drivers/mailbox/Kconfig > @@ -85,4 +85,13 @@ config MAILBOX_TEST > Test client to help with testing new Controller driver > implementations. > > +config XGENE_SLIMPRO_MBOX > + tristate "APM SoC X-Gene SLIMpro Mailbox Controller" > + depends on ARCH_XGENE > + help > + An implementation of the APM X-Gene Interprocessor Communication > + Mailbox (IPCM) between the ARM 64-bit cores and SLIMpro controller. > + It is used to send short messages between ARM64-bit cores and > + the SLIMpro Management Engine, primarily for PM. Say Y here if you > + want to use the APM X-Gene SLIMpro IPCM support. > endif > diff --git a/drivers/mailbox/Makefile b/drivers/mailbox/Makefile > index 92435ef..b602ef8 100644 > --- a/drivers/mailbox/Makefile > +++ b/drivers/mailbox/Makefile > @@ -17,3 +17,5 @@ obj-$(CONFIG_ALTERA_MBOX) += mailbox-altera.o > obj-$(CONFIG_BCM2835_MBOX) += bcm2835-mailbox.o > > obj-$(CONFIG_STI_MBOX) += mailbox-sti.o > + > +obj-$(CONFIG_XGENE_SLIMPRO_MBOX) += mailbox-xgene-slimpro.o > diff --git a/drivers/mailbox/mailbox-xgene-slimpro.c b/drivers/mailbox/mailbox-xgene-slimpro.c > new file mode 100644 > index 0000000..a7b0c9e > --- /dev/null > +++ b/drivers/mailbox/mailbox-xgene-slimpro.c > @@ -0,0 +1,265 @@ > +/* > + * APM X-Gene SLIMpro MailBox Driver > + * > + * Copyright (c) 2015, Applied Micro Circuits Corporation > + * Author: Feng Kan fkan@apm.com > + * > + * This program is free software; you can redistribute it and/or > + * modify it under the terms of the GNU General Public License as > + * published by the Free Software Foundation; either version 2 of > + * the License, or (at your option) any later version. > + * > + * This program is distributed in the hope that it will be useful, > + * but WITHOUT ANY WARRANTY; without even the implied warranty of > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > + * GNU General Public License for more details. > + * > + * You should have received a copy of the GNU General Public License > + * along with this program; if not, see <http://www.gnu.org/licenses/>. > + * > + */ > +#include <linux/acpi.h> > +#include <linux/delay.h> > +#include <linux/interrupt.h> > +#include <linux/io.h> > +#include <linux/mailbox_controller.h> > +#include <linux/module.h> > +#include <linux/of.h> > +#include <linux/platform_device.h> > +#include <linux/spinlock.h> > + > +#define MBOX_CON_NAME "slimpro-mbox" > +#define MBOX_REG_SET_OFFSET 0x1000 > +#define MBOX_CNT 8 > +#define MBOX_STATUS_AVAIL_MASK BIT(16) > +#define MBOX_STATUS_ACK_MASK BIT(0) > + > +/* Configuration and Status Registers */ > +#define REG_DB_IN 0x00 > +#define REG_DB_DIN0 0x04 > +#define REG_DB_DIN1 0x08 > +#define REG_DB_OUT 0x10 > +#define REG_DB_DOUT0 0x14 > +#define REG_DB_DOUT1 0x18 > +#define REG_DB_STAT 0x20 > +#define REG_DB_STATMASK 0x24 > + > +struct slimpro_mbox_chan { > + struct device *dev; > + struct mbox_chan *chan; > + void __iomem *reg; > + int irq; > + u32 rx_msg[3]; > +}; > + > +struct slimpro_mbox { > + struct mbox_controller mb_ctrl; > + struct slimpro_mbox_chan mc[MBOX_CNT]; > + struct mbox_chan chans[MBOX_CNT]; > +}; > + > +static void mb_chan_send_msg(struct slimpro_mbox_chan *mb_chan, u32 *msg) > +{ > + writel(msg[1], mb_chan->reg + REG_DB_DOUT0); > + writel(msg[2], mb_chan->reg + REG_DB_DOUT1); > + writel(msg[0], mb_chan->reg + REG_DB_OUT); > +} > + > +static void mb_chan_recv_msg(struct slimpro_mbox_chan *mb_chan) > +{ > + mb_chan->rx_msg[1] = readl(mb_chan->reg + REG_DB_DIN0); > + mb_chan->rx_msg[2] = readl(mb_chan->reg + REG_DB_DIN1); > + mb_chan->rx_msg[0] = readl(mb_chan->reg + REG_DB_IN); > +} > + > +static int mb_chan_status_ack(struct slimpro_mbox_chan *mb_chan) > +{ > + u32 val = readl(mb_chan->reg + REG_DB_STAT); > + > + if (val & MBOX_STATUS_ACK_MASK) { > + writel(MBOX_STATUS_ACK_MASK, mb_chan->reg + REG_DB_STAT); > + return 1; > + } > + return 0; > +} > + > +static int mb_chan_status_avail(struct slimpro_mbox_chan *mb_chan) > +{ > + u32 val = readl(mb_chan->reg + REG_DB_STAT); > + > + if (val & MBOX_STATUS_AVAIL_MASK) { > + mb_chan_recv_msg(mb_chan); > + writel(MBOX_STATUS_AVAIL_MASK, mb_chan->reg + REG_DB_STAT); > + return 1; > + } > + return 0; > +} > + > +static irqreturn_t slimpro_mbox_irq(int irq, void *id) > +{ > + struct slimpro_mbox_chan *mb_chan = id; > + > + if (mb_chan_status_ack(mb_chan)) > + mbox_chan_txdone(mb_chan->chan, 0); > + > + if (mb_chan_status_avail(mb_chan)) > + mbox_chan_received_data(mb_chan->chan, mb_chan->rx_msg); > + > + return IRQ_HANDLED; > +} > + > +static int slimpro_mbox_send_data(struct mbox_chan *chan, void *msg) > +{ > + struct slimpro_mbox_chan *mb_chan = chan->con_priv; > + > + mb_chan_send_msg(mb_chan, msg); > + return 0; > +} > + > +static int slimpro_mbox_startup(struct mbox_chan *chan) > +{ > + struct slimpro_mbox_chan *mb_chan = chan->con_priv; > + int rc; > + u32 val; > + > + rc = devm_request_irq(mb_chan->dev, mb_chan->irq, slimpro_mbox_irq, 0, > + MBOX_CON_NAME, mb_chan); > + if (unlikely(rc)) { > + dev_err(mb_chan->dev, "failed to register mailbox interrupt %d\n", > + mb_chan->irq); > + return rc; > + } > + > + /* Enable HW interrupt */ > + writel(MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK, > + mb_chan->reg + REG_DB_STAT); > + /* Unmask doorbell status interrupt */ > + val = readl(mb_chan->reg + REG_DB_STATMASK); > + val &= ~(MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK); > + writel(val, mb_chan->reg + REG_DB_STATMASK); > + > + return 0; > +} > + > +static void slimpro_mbox_shutdown(struct mbox_chan *chan) > +{ > + struct slimpro_mbox_chan *mb_chan = chan->con_priv; > + u32 val; > + > + /* Mask doorbell status interrupt */ > + val = readl(mb_chan->reg + REG_DB_STATMASK); > + val |= (MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK); > + writel(val, mb_chan->reg + REG_DB_STATMASK); > + > + devm_free_irq(mb_chan->dev, mb_chan->irq, mb_chan); > +} > + > +static struct mbox_chan_ops slimpro_mbox_ops = { > + .send_data = slimpro_mbox_send_data, > + .startup = slimpro_mbox_startup, > + .shutdown = slimpro_mbox_shutdown, > +}; > + > +static int __init slimpro_mbox_probe(struct platform_device *pdev) > +{ > + struct slimpro_mbox *ctx; > + struct resource *regs; > + void __iomem *mb_base; > + int rc; > + int i; > + > + ctx = devm_kzalloc(&pdev->dev, sizeof(struct slimpro_mbox), GFP_KERNEL); > + if (IS_ERR(ctx)) > + return PTR_ERR(ctx); > + > + platform_set_drvdata(pdev, ctx); > + > + regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); > + mb_base = devm_ioremap(&pdev->dev, regs->start, resource_size(regs)); > + if (IS_ERR(mb_base)) > + return PTR_ERR(mb_base); > + > + /* Setup mailbox links */ > + for (i = 0; i < MBOX_CNT; i++) { > + ctx->mc[i].irq = platform_get_irq(pdev, i); > + if (ctx->mc[i].irq < 0) { > + if (i == 0) { > + dev_err(&pdev->dev, "no available IRQ\n"); > + return -EINVAL; > + } > + dev_info(&pdev->dev, "no IRQ at index %d\n", > + ctx->mc[i].irq); > + break; > + } > + > + ctx->mc[i].dev = &pdev->dev; > + ctx->mc[i].reg = mb_base + i * MBOX_REG_SET_OFFSET; > + ctx->mc[i].chan = &ctx->chans[i]; > + ctx->chans[i].con_priv = &ctx->mc[i]; > + } > + > + /* Setup mailbox controller */ > + ctx->mb_ctrl.dev = &pdev->dev; > + ctx->mb_ctrl.chans = ctx->chans; > + ctx->mb_ctrl.txdone_irq = true; > + ctx->mb_ctrl.ops = &slimpro_mbox_ops; > + ctx->mb_ctrl.num_chans = i; > + > + rc = mbox_controller_register(&ctx->mb_ctrl); > + if (rc) { > + dev_err(&pdev->dev, > + "APM X-Gene SLIMpro MailBox register failed:%d\n", rc); > + return rc; > + } > + > + dev_info(&pdev->dev, "APM X-Gene SLIMpro MailBox registered\n"); > + return 0; > +} > + > +static int slimpro_mbox_remove(struct platform_device *pdev) > +{ > + struct slimpro_mbox *smb = platform_get_drvdata(pdev); > + > + mbox_controller_unregister(&smb->mb_ctrl); > + return 0; > +} > + > +static const struct of_device_id slimpro_of_match[] = { > + {.compatible = "apm,xgene-slimpro-mbox" }, > + { }, > +}; > +MODULE_DEVICE_TABLE(of, slimpro_of_match); > + > +#ifdef CONFIG_ACPI > +static const struct acpi_device_id slimpro_acpi_ids[] = { > + {"APMC0D01", 0}, > + {} > +}; > +MODULE_DEVICE_TABLE(acpi, slimpro_acpi_ids); > +#endif > + > +static struct platform_driver slimpro_mbox_driver = { > + .probe = slimpro_mbox_probe, > + .remove = slimpro_mbox_remove, > + .driver = { > + .name = "xgene-slimpro-mbox", > + .of_match_table = of_match_ptr(slimpro_of_match), > + .acpi_match_table = ACPI_PTR(slimpro_acpi_ids) > + }, > +}; > + > +static int __init slimpro_mbox_init(void) > +{ > + return platform_driver_register(&slimpro_mbox_driver); > +} > + > +static void __exit slimpro_mbox_exit(void) > +{ > + platform_driver_unregister(&slimpro_mbox_driver); > +} > + > +subsys_initcall(slimpro_mbox_init); > +module_exit(slimpro_mbox_exit); > + > +MODULE_DESCRIPTION("APM X-Gene SLIMpro Mailbox Driver"); > +MODULE_LICENSE("GPL"); > -- > 1.9.1 > ^ permalink raw reply [flat|nested] 95+ messages in thread
* Re: [PATCH v4 1/3] mailbox: Add support for APM X-Gene platform mailbox driver @ 2016-02-01 19:38 ` Duc Dang 0 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2016-02-01 19:38 UTC (permalink / raw) To: Jassi Brar, Paul Bolle, Rob Herring Cc: Devicetree List, linux-arm, Linux Kernel Mailing List, patches, Duc Dang, Feng Kan Hi Jassi, On Fri, Jan 15, 2016 at 6:57 PM, Duc Dang <dhdang-qTEPVZfXA3Y@public.gmane.org> wrote: > X-Gene mailbox controller provides 8 mailbox channels, with > each channel has a dedicated interrupt line. Did you have a chance to look into this version 4 of my mail-box patch? Regards, Duc Dang. > > Signed-off-by: Feng Kan <fkan-qTEPVZfXA3Y@public.gmane.org> > Signed-off-by: Duc Dang <dhdang-qTEPVZfXA3Y@public.gmane.org> > --- > Changes since v3: > - Rebase over v4.4 > - Remove 'id' in slimpro_mbox_chan structure > - Remove small functions that are only called once > and fold them into the other callers > - Remove void* pointer type cast > - Relax the number of mailbox IRQs condition > - Use subsys_initcall to guarantee mailbox driver > will be registered before any other dependent driver > is loaded. > > drivers/mailbox/Kconfig | 9 ++ > drivers/mailbox/Makefile | 2 + > drivers/mailbox/mailbox-xgene-slimpro.c | 265 ++++++++++++++++++++++++++++++++ > 3 files changed, 276 insertions(+) > create mode 100644 drivers/mailbox/mailbox-xgene-slimpro.c > > diff --git a/drivers/mailbox/Kconfig b/drivers/mailbox/Kconfig > index 546d05f..678e434 100644 > --- a/drivers/mailbox/Kconfig > +++ b/drivers/mailbox/Kconfig > @@ -85,4 +85,13 @@ config MAILBOX_TEST > Test client to help with testing new Controller driver > implementations. > > +config XGENE_SLIMPRO_MBOX > + tristate "APM SoC X-Gene SLIMpro Mailbox Controller" > + depends on ARCH_XGENE > + help > + An implementation of the APM X-Gene Interprocessor Communication > + Mailbox (IPCM) between the ARM 64-bit cores and SLIMpro controller. > + It is used to send short messages between ARM64-bit cores and > + the SLIMpro Management Engine, primarily for PM. Say Y here if you > + want to use the APM X-Gene SLIMpro IPCM support. > endif > diff --git a/drivers/mailbox/Makefile b/drivers/mailbox/Makefile > index 92435ef..b602ef8 100644 > --- a/drivers/mailbox/Makefile > +++ b/drivers/mailbox/Makefile > @@ -17,3 +17,5 @@ obj-$(CONFIG_ALTERA_MBOX) += mailbox-altera.o > obj-$(CONFIG_BCM2835_MBOX) += bcm2835-mailbox.o > > obj-$(CONFIG_STI_MBOX) += mailbox-sti.o > + > +obj-$(CONFIG_XGENE_SLIMPRO_MBOX) += mailbox-xgene-slimpro.o > diff --git a/drivers/mailbox/mailbox-xgene-slimpro.c b/drivers/mailbox/mailbox-xgene-slimpro.c > new file mode 100644 > index 0000000..a7b0c9e > --- /dev/null > +++ b/drivers/mailbox/mailbox-xgene-slimpro.c > @@ -0,0 +1,265 @@ > +/* > + * APM X-Gene SLIMpro MailBox Driver > + * > + * Copyright (c) 2015, Applied Micro Circuits Corporation > + * Author: Feng Kan fkan-qTEPVZfXA3Y@public.gmane.org > + * > + * This program is free software; you can redistribute it and/or > + * modify it under the terms of the GNU General Public License as > + * published by the Free Software Foundation; either version 2 of > + * the License, or (at your option) any later version. > + * > + * This program is distributed in the hope that it will be useful, > + * but WITHOUT ANY WARRANTY; without even the implied warranty of > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > + * GNU General Public License for more details. > + * > + * You should have received a copy of the GNU General Public License > + * along with this program; if not, see <http://www.gnu.org/licenses/>. > + * > + */ > +#include <linux/acpi.h> > +#include <linux/delay.h> > +#include <linux/interrupt.h> > +#include <linux/io.h> > +#include <linux/mailbox_controller.h> > +#include <linux/module.h> > +#include <linux/of.h> > +#include <linux/platform_device.h> > +#include <linux/spinlock.h> > + > +#define MBOX_CON_NAME "slimpro-mbox" > +#define MBOX_REG_SET_OFFSET 0x1000 > +#define MBOX_CNT 8 > +#define MBOX_STATUS_AVAIL_MASK BIT(16) > +#define MBOX_STATUS_ACK_MASK BIT(0) > + > +/* Configuration and Status Registers */ > +#define REG_DB_IN 0x00 > +#define REG_DB_DIN0 0x04 > +#define REG_DB_DIN1 0x08 > +#define REG_DB_OUT 0x10 > +#define REG_DB_DOUT0 0x14 > +#define REG_DB_DOUT1 0x18 > +#define REG_DB_STAT 0x20 > +#define REG_DB_STATMASK 0x24 > + > +struct slimpro_mbox_chan { > + struct device *dev; > + struct mbox_chan *chan; > + void __iomem *reg; > + int irq; > + u32 rx_msg[3]; > +}; > + > +struct slimpro_mbox { > + struct mbox_controller mb_ctrl; > + struct slimpro_mbox_chan mc[MBOX_CNT]; > + struct mbox_chan chans[MBOX_CNT]; > +}; > + > +static void mb_chan_send_msg(struct slimpro_mbox_chan *mb_chan, u32 *msg) > +{ > + writel(msg[1], mb_chan->reg + REG_DB_DOUT0); > + writel(msg[2], mb_chan->reg + REG_DB_DOUT1); > + writel(msg[0], mb_chan->reg + REG_DB_OUT); > +} > + > +static void mb_chan_recv_msg(struct slimpro_mbox_chan *mb_chan) > +{ > + mb_chan->rx_msg[1] = readl(mb_chan->reg + REG_DB_DIN0); > + mb_chan->rx_msg[2] = readl(mb_chan->reg + REG_DB_DIN1); > + mb_chan->rx_msg[0] = readl(mb_chan->reg + REG_DB_IN); > +} > + > +static int mb_chan_status_ack(struct slimpro_mbox_chan *mb_chan) > +{ > + u32 val = readl(mb_chan->reg + REG_DB_STAT); > + > + if (val & MBOX_STATUS_ACK_MASK) { > + writel(MBOX_STATUS_ACK_MASK, mb_chan->reg + REG_DB_STAT); > + return 1; > + } > + return 0; > +} > + > +static int mb_chan_status_avail(struct slimpro_mbox_chan *mb_chan) > +{ > + u32 val = readl(mb_chan->reg + REG_DB_STAT); > + > + if (val & MBOX_STATUS_AVAIL_MASK) { > + mb_chan_recv_msg(mb_chan); > + writel(MBOX_STATUS_AVAIL_MASK, mb_chan->reg + REG_DB_STAT); > + return 1; > + } > + return 0; > +} > + > +static irqreturn_t slimpro_mbox_irq(int irq, void *id) > +{ > + struct slimpro_mbox_chan *mb_chan = id; > + > + if (mb_chan_status_ack(mb_chan)) > + mbox_chan_txdone(mb_chan->chan, 0); > + > + if (mb_chan_status_avail(mb_chan)) > + mbox_chan_received_data(mb_chan->chan, mb_chan->rx_msg); > + > + return IRQ_HANDLED; > +} > + > +static int slimpro_mbox_send_data(struct mbox_chan *chan, void *msg) > +{ > + struct slimpro_mbox_chan *mb_chan = chan->con_priv; > + > + mb_chan_send_msg(mb_chan, msg); > + return 0; > +} > + > +static int slimpro_mbox_startup(struct mbox_chan *chan) > +{ > + struct slimpro_mbox_chan *mb_chan = chan->con_priv; > + int rc; > + u32 val; > + > + rc = devm_request_irq(mb_chan->dev, mb_chan->irq, slimpro_mbox_irq, 0, > + MBOX_CON_NAME, mb_chan); > + if (unlikely(rc)) { > + dev_err(mb_chan->dev, "failed to register mailbox interrupt %d\n", > + mb_chan->irq); > + return rc; > + } > + > + /* Enable HW interrupt */ > + writel(MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK, > + mb_chan->reg + REG_DB_STAT); > + /* Unmask doorbell status interrupt */ > + val = readl(mb_chan->reg + REG_DB_STATMASK); > + val &= ~(MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK); > + writel(val, mb_chan->reg + REG_DB_STATMASK); > + > + return 0; > +} > + > +static void slimpro_mbox_shutdown(struct mbox_chan *chan) > +{ > + struct slimpro_mbox_chan *mb_chan = chan->con_priv; > + u32 val; > + > + /* Mask doorbell status interrupt */ > + val = readl(mb_chan->reg + REG_DB_STATMASK); > + val |= (MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK); > + writel(val, mb_chan->reg + REG_DB_STATMASK); > + > + devm_free_irq(mb_chan->dev, mb_chan->irq, mb_chan); > +} > + > +static struct mbox_chan_ops slimpro_mbox_ops = { > + .send_data = slimpro_mbox_send_data, > + .startup = slimpro_mbox_startup, > + .shutdown = slimpro_mbox_shutdown, > +}; > + > +static int __init slimpro_mbox_probe(struct platform_device *pdev) > +{ > + struct slimpro_mbox *ctx; > + struct resource *regs; > + void __iomem *mb_base; > + int rc; > + int i; > + > + ctx = devm_kzalloc(&pdev->dev, sizeof(struct slimpro_mbox), GFP_KERNEL); > + if (IS_ERR(ctx)) > + return PTR_ERR(ctx); > + > + platform_set_drvdata(pdev, ctx); > + > + regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); > + mb_base = devm_ioremap(&pdev->dev, regs->start, resource_size(regs)); > + if (IS_ERR(mb_base)) > + return PTR_ERR(mb_base); > + > + /* Setup mailbox links */ > + for (i = 0; i < MBOX_CNT; i++) { > + ctx->mc[i].irq = platform_get_irq(pdev, i); > + if (ctx->mc[i].irq < 0) { > + if (i == 0) { > + dev_err(&pdev->dev, "no available IRQ\n"); > + return -EINVAL; > + } > + dev_info(&pdev->dev, "no IRQ at index %d\n", > + ctx->mc[i].irq); > + break; > + } > + > + ctx->mc[i].dev = &pdev->dev; > + ctx->mc[i].reg = mb_base + i * MBOX_REG_SET_OFFSET; > + ctx->mc[i].chan = &ctx->chans[i]; > + ctx->chans[i].con_priv = &ctx->mc[i]; > + } > + > + /* Setup mailbox controller */ > + ctx->mb_ctrl.dev = &pdev->dev; > + ctx->mb_ctrl.chans = ctx->chans; > + ctx->mb_ctrl.txdone_irq = true; > + ctx->mb_ctrl.ops = &slimpro_mbox_ops; > + ctx->mb_ctrl.num_chans = i; > + > + rc = mbox_controller_register(&ctx->mb_ctrl); > + if (rc) { > + dev_err(&pdev->dev, > + "APM X-Gene SLIMpro MailBox register failed:%d\n", rc); > + return rc; > + } > + > + dev_info(&pdev->dev, "APM X-Gene SLIMpro MailBox registered\n"); > + return 0; > +} > + > +static int slimpro_mbox_remove(struct platform_device *pdev) > +{ > + struct slimpro_mbox *smb = platform_get_drvdata(pdev); > + > + mbox_controller_unregister(&smb->mb_ctrl); > + return 0; > +} > + > +static const struct of_device_id slimpro_of_match[] = { > + {.compatible = "apm,xgene-slimpro-mbox" }, > + { }, > +}; > +MODULE_DEVICE_TABLE(of, slimpro_of_match); > + > +#ifdef CONFIG_ACPI > +static const struct acpi_device_id slimpro_acpi_ids[] = { > + {"APMC0D01", 0}, > + {} > +}; > +MODULE_DEVICE_TABLE(acpi, slimpro_acpi_ids); > +#endif > + > +static struct platform_driver slimpro_mbox_driver = { > + .probe = slimpro_mbox_probe, > + .remove = slimpro_mbox_remove, > + .driver = { > + .name = "xgene-slimpro-mbox", > + .of_match_table = of_match_ptr(slimpro_of_match), > + .acpi_match_table = ACPI_PTR(slimpro_acpi_ids) > + }, > +}; > + > +static int __init slimpro_mbox_init(void) > +{ > + return platform_driver_register(&slimpro_mbox_driver); > +} > + > +static void __exit slimpro_mbox_exit(void) > +{ > + platform_driver_unregister(&slimpro_mbox_driver); > +} > + > +subsys_initcall(slimpro_mbox_init); > +module_exit(slimpro_mbox_exit); > + > +MODULE_DESCRIPTION("APM X-Gene SLIMpro Mailbox Driver"); > +MODULE_LICENSE("GPL"); > -- > 1.9.1 > -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html ^ permalink raw reply [flat|nested] 95+ messages in thread
* [PATCH v4 1/3] mailbox: Add support for APM X-Gene platform mailbox driver 2016-02-01 19:38 ` Duc Dang @ 2016-02-02 5:14 ` Jassi Brar -1 siblings, 0 replies; 95+ messages in thread From: Jassi Brar @ 2016-02-02 5:14 UTC (permalink / raw) To: linux-arm-kernel On Tue, Feb 2, 2016 at 1:08 AM, Duc Dang <dhdang@apm.com> wrote: > Hi Jassi, > > On Fri, Jan 15, 2016 at 6:57 PM, Duc Dang <dhdang@apm.com> wrote: >> X-Gene mailbox controller provides 8 mailbox channels, with >> each channel has a dedicated interrupt line. > > Did you have a chance to look into this version 4 of my mail-box patch? > Seems ok, please just fix the "section mismatch" warnings reported by the build-bot. Thanks ^ permalink raw reply [flat|nested] 95+ messages in thread
* Re: [PATCH v4 1/3] mailbox: Add support for APM X-Gene platform mailbox driver @ 2016-02-02 5:14 ` Jassi Brar 0 siblings, 0 replies; 95+ messages in thread From: Jassi Brar @ 2016-02-02 5:14 UTC (permalink / raw) To: Duc Dang Cc: Paul Bolle, Rob Herring, Devicetree List, linux-arm, Linux Kernel Mailing List, patches, Feng Kan On Tue, Feb 2, 2016 at 1:08 AM, Duc Dang <dhdang@apm.com> wrote: > Hi Jassi, > > On Fri, Jan 15, 2016 at 6:57 PM, Duc Dang <dhdang@apm.com> wrote: >> X-Gene mailbox controller provides 8 mailbox channels, with >> each channel has a dedicated interrupt line. > > Did you have a chance to look into this version 4 of my mail-box patch? > Seems ok, please just fix the "section mismatch" warnings reported by the build-bot. Thanks ^ permalink raw reply [flat|nested] 95+ messages in thread
* [PATCH v5 0/3] mailbox: Add APM X-Gene platform mailbox driver @ 2016-02-08 22:04 ` Duc Dang 0 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2016-02-08 22:04 UTC (permalink / raw) To: linux-arm-kernel APM X-Gene SoC has a mailbox controller that provides communication mechanism for X-Gene Arm64 cores to communicate with X-Gene SoC's Cortex M3 (SLIMpro) processor. X-Gene mailbox controller provides 8 mailbox channels, with each channel has a dedicated interrupt line. Changes since v4: - Rebase over v4.5-rc1 - Fix section mismatch warning during compiling - Correctly print channel number when there is no IRQ for that channel - Change node name to mailbox at 10540000 - Correct the number of IRQs in documentation Changes since v3: - Rebase over v4.4 - Remove 'id' in slimpro_mbox_chan structure - Remove functions that are only called once and fold them into the other callers - Remove void* pointer type cast - Relax the number of mailbox IRQs condition - Fix error and address comment in documentation (xgene-slimpro-mailbox.txt) Changes since v2: - Rebase Feng's patch set over v4.3-rc5 - Remove uneccessary 'inline' in function definition - Use module_platform_driver instead of subsys_initcall - Minor coding stype clean up Changes since v1: - Add ACPI support - Use defines for reg offset Duc Dang (3): mailbox: Add support for APM X-Gene platform mailbox driver Documentation: mailbox: Add APM X-Gene SLIMpro mailbox dts documentation arm64: dts: mailbox device tree node for APM X-Gene platform. .../bindings/mailbox/xgene-slimpro-mailbox.txt | 35 +++ arch/arm64/boot/dts/apm/apm-storm.dtsi | 14 ++ drivers/mailbox/Kconfig | 9 + drivers/mailbox/Makefile | 2 + drivers/mailbox/mailbox-xgene-slimpro.c | 264 +++++++++++++++++++++ 5 files changed, 324 insertions(+) create mode 100644 Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt create mode 100644 drivers/mailbox/mailbox-xgene-slimpro.c -- 1.9.1 ^ permalink raw reply [flat|nested] 95+ messages in thread
* [PATCH v5 0/3] mailbox: Add APM X-Gene platform mailbox driver @ 2016-02-08 22:04 ` Duc Dang 0 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2016-02-08 22:04 UTC (permalink / raw) To: Jassi Brar, Rob Herring Cc: Paul Bolle, devicetree, linux-arm-kernel, linux-kernel, patches, Duc Dang APM X-Gene SoC has a mailbox controller that provides communication mechanism for X-Gene Arm64 cores to communicate with X-Gene SoC's Cortex M3 (SLIMpro) processor. X-Gene mailbox controller provides 8 mailbox channels, with each channel has a dedicated interrupt line. Changes since v4: - Rebase over v4.5-rc1 - Fix section mismatch warning during compiling - Correctly print channel number when there is no IRQ for that channel - Change node name to mailbox@10540000 - Correct the number of IRQs in documentation Changes since v3: - Rebase over v4.4 - Remove 'id' in slimpro_mbox_chan structure - Remove functions that are only called once and fold them into the other callers - Remove void* pointer type cast - Relax the number of mailbox IRQs condition - Fix error and address comment in documentation (xgene-slimpro-mailbox.txt) Changes since v2: - Rebase Feng's patch set over v4.3-rc5 - Remove uneccessary 'inline' in function definition - Use module_platform_driver instead of subsys_initcall - Minor coding stype clean up Changes since v1: - Add ACPI support - Use defines for reg offset Duc Dang (3): mailbox: Add support for APM X-Gene platform mailbox driver Documentation: mailbox: Add APM X-Gene SLIMpro mailbox dts documentation arm64: dts: mailbox device tree node for APM X-Gene platform. .../bindings/mailbox/xgene-slimpro-mailbox.txt | 35 +++ arch/arm64/boot/dts/apm/apm-storm.dtsi | 14 ++ drivers/mailbox/Kconfig | 9 + drivers/mailbox/Makefile | 2 + drivers/mailbox/mailbox-xgene-slimpro.c | 264 +++++++++++++++++++++ 5 files changed, 324 insertions(+) create mode 100644 Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt create mode 100644 drivers/mailbox/mailbox-xgene-slimpro.c -- 1.9.1 ^ permalink raw reply [flat|nested] 95+ messages in thread
* [PATCH v5 0/3] mailbox: Add APM X-Gene platform mailbox driver @ 2016-02-08 22:04 ` Duc Dang 0 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2016-02-08 22:04 UTC (permalink / raw) To: Jassi Brar, Rob Herring Cc: Paul Bolle, devicetree-u79uwXL29TY76Z2rM5mHXA, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r, linux-kernel-u79uwXL29TY76Z2rM5mHXA, patches-qTEPVZfXA3Y, Duc Dang APM X-Gene SoC has a mailbox controller that provides communication mechanism for X-Gene Arm64 cores to communicate with X-Gene SoC's Cortex M3 (SLIMpro) processor. X-Gene mailbox controller provides 8 mailbox channels, with each channel has a dedicated interrupt line. Changes since v4: - Rebase over v4.5-rc1 - Fix section mismatch warning during compiling - Correctly print channel number when there is no IRQ for that channel - Change node name to mailbox@10540000 - Correct the number of IRQs in documentation Changes since v3: - Rebase over v4.4 - Remove 'id' in slimpro_mbox_chan structure - Remove functions that are only called once and fold them into the other callers - Remove void* pointer type cast - Relax the number of mailbox IRQs condition - Fix error and address comment in documentation (xgene-slimpro-mailbox.txt) Changes since v2: - Rebase Feng's patch set over v4.3-rc5 - Remove uneccessary 'inline' in function definition - Use module_platform_driver instead of subsys_initcall - Minor coding stype clean up Changes since v1: - Add ACPI support - Use defines for reg offset Duc Dang (3): mailbox: Add support for APM X-Gene platform mailbox driver Documentation: mailbox: Add APM X-Gene SLIMpro mailbox dts documentation arm64: dts: mailbox device tree node for APM X-Gene platform. .../bindings/mailbox/xgene-slimpro-mailbox.txt | 35 +++ arch/arm64/boot/dts/apm/apm-storm.dtsi | 14 ++ drivers/mailbox/Kconfig | 9 + drivers/mailbox/Makefile | 2 + drivers/mailbox/mailbox-xgene-slimpro.c | 264 +++++++++++++++++++++ 5 files changed, 324 insertions(+) create mode 100644 Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt create mode 100644 drivers/mailbox/mailbox-xgene-slimpro.c -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html ^ permalink raw reply [flat|nested] 95+ messages in thread
* [PATCH v5 1/3] mailbox: Add support for APM X-Gene platform mailbox driver 2016-02-08 22:04 ` Duc Dang @ 2016-02-08 22:04 ` Duc Dang -1 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2016-02-08 22:04 UTC (permalink / raw) To: linux-arm-kernel X-Gene mailbox controller provides 8 mailbox channels, with each channel has a dedicated interrupt line. Signed-off-by: Feng Kan <fkan@apm.com> Signed-off-by: Duc Dang <dhdang@apm.com> --- Changes since v4: - Rebase over v4.5-rc1 - Fix section mistmatch warning by removing __init in slimpro_mbox_probe declaration - Correctly print channel number when there is no IRQ for that channel Changes since v3: - Rebase over v4.4 - Remove 'id' in slimpro_mbox_chan structure - Remove small functions that are only called once and fold them into the other callers - Remove void* pointer type cast - Relax the number of mailbox IRQs condition - Use subsys_initcall to guarantee mailbox driver will be registered before any other dependent driver is loaded. drivers/mailbox/Kconfig | 9 ++ drivers/mailbox/Makefile | 2 + drivers/mailbox/mailbox-xgene-slimpro.c | 264 ++++++++++++++++++++++++++++++++ 3 files changed, 275 insertions(+) create mode 100644 drivers/mailbox/mailbox-xgene-slimpro.c diff --git a/drivers/mailbox/Kconfig b/drivers/mailbox/Kconfig index 546d05f..678e434 100644 --- a/drivers/mailbox/Kconfig +++ b/drivers/mailbox/Kconfig @@ -85,4 +85,13 @@ config MAILBOX_TEST Test client to help with testing new Controller driver implementations. +config XGENE_SLIMPRO_MBOX + tristate "APM SoC X-Gene SLIMpro Mailbox Controller" + depends on ARCH_XGENE + help + An implementation of the APM X-Gene Interprocessor Communication + Mailbox (IPCM) between the ARM 64-bit cores and SLIMpro controller. + It is used to send short messages between ARM64-bit cores and + the SLIMpro Management Engine, primarily for PM. Say Y here if you + want to use the APM X-Gene SLIMpro IPCM support. endif diff --git a/drivers/mailbox/Makefile b/drivers/mailbox/Makefile index 92435ef..b602ef8 100644 --- a/drivers/mailbox/Makefile +++ b/drivers/mailbox/Makefile @@ -17,3 +17,5 @@ obj-$(CONFIG_ALTERA_MBOX) += mailbox-altera.o obj-$(CONFIG_BCM2835_MBOX) += bcm2835-mailbox.o obj-$(CONFIG_STI_MBOX) += mailbox-sti.o + +obj-$(CONFIG_XGENE_SLIMPRO_MBOX) += mailbox-xgene-slimpro.o diff --git a/drivers/mailbox/mailbox-xgene-slimpro.c b/drivers/mailbox/mailbox-xgene-slimpro.c new file mode 100644 index 0000000..0ea1eb8 --- /dev/null +++ b/drivers/mailbox/mailbox-xgene-slimpro.c @@ -0,0 +1,264 @@ +/* + * APM X-Gene SLIMpro MailBox Driver + * + * Copyright (c) 2015, Applied Micro Circuits Corporation + * Author: Feng Kan fkan at apm.com + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <http://www.gnu.org/licenses/>. + * + */ +#include <linux/acpi.h> +#include <linux/delay.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/mailbox_controller.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/spinlock.h> + +#define MBOX_CON_NAME "slimpro-mbox" +#define MBOX_REG_SET_OFFSET 0x1000 +#define MBOX_CNT 8 +#define MBOX_STATUS_AVAIL_MASK BIT(16) +#define MBOX_STATUS_ACK_MASK BIT(0) + +/* Configuration and Status Registers */ +#define REG_DB_IN 0x00 +#define REG_DB_DIN0 0x04 +#define REG_DB_DIN1 0x08 +#define REG_DB_OUT 0x10 +#define REG_DB_DOUT0 0x14 +#define REG_DB_DOUT1 0x18 +#define REG_DB_STAT 0x20 +#define REG_DB_STATMASK 0x24 + +struct slimpro_mbox_chan { + struct device *dev; + struct mbox_chan *chan; + void __iomem *reg; + int irq; + u32 rx_msg[3]; +}; + +struct slimpro_mbox { + struct mbox_controller mb_ctrl; + struct slimpro_mbox_chan mc[MBOX_CNT]; + struct mbox_chan chans[MBOX_CNT]; +}; + +static void mb_chan_send_msg(struct slimpro_mbox_chan *mb_chan, u32 *msg) +{ + writel(msg[1], mb_chan->reg + REG_DB_DOUT0); + writel(msg[2], mb_chan->reg + REG_DB_DOUT1); + writel(msg[0], mb_chan->reg + REG_DB_OUT); +} + +static void mb_chan_recv_msg(struct slimpro_mbox_chan *mb_chan) +{ + mb_chan->rx_msg[1] = readl(mb_chan->reg + REG_DB_DIN0); + mb_chan->rx_msg[2] = readl(mb_chan->reg + REG_DB_DIN1); + mb_chan->rx_msg[0] = readl(mb_chan->reg + REG_DB_IN); +} + +static int mb_chan_status_ack(struct slimpro_mbox_chan *mb_chan) +{ + u32 val = readl(mb_chan->reg + REG_DB_STAT); + + if (val & MBOX_STATUS_ACK_MASK) { + writel(MBOX_STATUS_ACK_MASK, mb_chan->reg + REG_DB_STAT); + return 1; + } + return 0; +} + +static int mb_chan_status_avail(struct slimpro_mbox_chan *mb_chan) +{ + u32 val = readl(mb_chan->reg + REG_DB_STAT); + + if (val & MBOX_STATUS_AVAIL_MASK) { + mb_chan_recv_msg(mb_chan); + writel(MBOX_STATUS_AVAIL_MASK, mb_chan->reg + REG_DB_STAT); + return 1; + } + return 0; +} + +static irqreturn_t slimpro_mbox_irq(int irq, void *id) +{ + struct slimpro_mbox_chan *mb_chan = id; + + if (mb_chan_status_ack(mb_chan)) + mbox_chan_txdone(mb_chan->chan, 0); + + if (mb_chan_status_avail(mb_chan)) + mbox_chan_received_data(mb_chan->chan, mb_chan->rx_msg); + + return IRQ_HANDLED; +} + +static int slimpro_mbox_send_data(struct mbox_chan *chan, void *msg) +{ + struct slimpro_mbox_chan *mb_chan = chan->con_priv; + + mb_chan_send_msg(mb_chan, msg); + return 0; +} + +static int slimpro_mbox_startup(struct mbox_chan *chan) +{ + struct slimpro_mbox_chan *mb_chan = chan->con_priv; + int rc; + u32 val; + + rc = devm_request_irq(mb_chan->dev, mb_chan->irq, slimpro_mbox_irq, 0, + MBOX_CON_NAME, mb_chan); + if (unlikely(rc)) { + dev_err(mb_chan->dev, "failed to register mailbox interrupt %d\n", + mb_chan->irq); + return rc; + } + + /* Enable HW interrupt */ + writel(MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK, + mb_chan->reg + REG_DB_STAT); + /* Unmask doorbell status interrupt */ + val = readl(mb_chan->reg + REG_DB_STATMASK); + val &= ~(MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK); + writel(val, mb_chan->reg + REG_DB_STATMASK); + + return 0; +} + +static void slimpro_mbox_shutdown(struct mbox_chan *chan) +{ + struct slimpro_mbox_chan *mb_chan = chan->con_priv; + u32 val; + + /* Mask doorbell status interrupt */ + val = readl(mb_chan->reg + REG_DB_STATMASK); + val |= (MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK); + writel(val, mb_chan->reg + REG_DB_STATMASK); + + devm_free_irq(mb_chan->dev, mb_chan->irq, mb_chan); +} + +static struct mbox_chan_ops slimpro_mbox_ops = { + .send_data = slimpro_mbox_send_data, + .startup = slimpro_mbox_startup, + .shutdown = slimpro_mbox_shutdown, +}; + +static int slimpro_mbox_probe(struct platform_device *pdev) +{ + struct slimpro_mbox *ctx; + struct resource *regs; + void __iomem *mb_base; + int rc; + int i; + + ctx = devm_kzalloc(&pdev->dev, sizeof(struct slimpro_mbox), GFP_KERNEL); + if (IS_ERR(ctx)) + return PTR_ERR(ctx); + + platform_set_drvdata(pdev, ctx); + + regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); + mb_base = devm_ioremap(&pdev->dev, regs->start, resource_size(regs)); + if (IS_ERR(mb_base)) + return PTR_ERR(mb_base); + + /* Setup mailbox links */ + for (i = 0; i < MBOX_CNT; i++) { + ctx->mc[i].irq = platform_get_irq(pdev, i); + if (ctx->mc[i].irq < 0) { + if (i == 0) { + dev_err(&pdev->dev, "no available IRQ\n"); + return -EINVAL; + } + dev_info(&pdev->dev, "no IRQ for channel %d\n", i); + break; + } + + ctx->mc[i].dev = &pdev->dev; + ctx->mc[i].reg = mb_base + i * MBOX_REG_SET_OFFSET; + ctx->mc[i].chan = &ctx->chans[i]; + ctx->chans[i].con_priv = &ctx->mc[i]; + } + + /* Setup mailbox controller */ + ctx->mb_ctrl.dev = &pdev->dev; + ctx->mb_ctrl.chans = ctx->chans; + ctx->mb_ctrl.txdone_irq = true; + ctx->mb_ctrl.ops = &slimpro_mbox_ops; + ctx->mb_ctrl.num_chans = i; + + rc = mbox_controller_register(&ctx->mb_ctrl); + if (rc) { + dev_err(&pdev->dev, + "APM X-Gene SLIMpro MailBox register failed:%d\n", rc); + return rc; + } + + dev_info(&pdev->dev, "APM X-Gene SLIMpro MailBox registered\n"); + return 0; +} + +static int slimpro_mbox_remove(struct platform_device *pdev) +{ + struct slimpro_mbox *smb = platform_get_drvdata(pdev); + + mbox_controller_unregister(&smb->mb_ctrl); + return 0; +} + +static const struct of_device_id slimpro_of_match[] = { + {.compatible = "apm,xgene-slimpro-mbox" }, + { }, +}; +MODULE_DEVICE_TABLE(of, slimpro_of_match); + +#ifdef CONFIG_ACPI +static const struct acpi_device_id slimpro_acpi_ids[] = { + {"APMC0D01", 0}, + {} +}; +MODULE_DEVICE_TABLE(acpi, slimpro_acpi_ids); +#endif + +static struct platform_driver slimpro_mbox_driver = { + .probe = slimpro_mbox_probe, + .remove = slimpro_mbox_remove, + .driver = { + .name = "xgene-slimpro-mbox", + .of_match_table = of_match_ptr(slimpro_of_match), + .acpi_match_table = ACPI_PTR(slimpro_acpi_ids) + }, +}; + +static int __init slimpro_mbox_init(void) +{ + return platform_driver_register(&slimpro_mbox_driver); +} + +static void __exit slimpro_mbox_exit(void) +{ + platform_driver_unregister(&slimpro_mbox_driver); +} + +subsys_initcall(slimpro_mbox_init); +module_exit(slimpro_mbox_exit); + +MODULE_DESCRIPTION("APM X-Gene SLIMpro Mailbox Driver"); +MODULE_LICENSE("GPL"); -- 1.9.1 ^ permalink raw reply related [flat|nested] 95+ messages in thread
* [PATCH v5 1/3] mailbox: Add support for APM X-Gene platform mailbox driver @ 2016-02-08 22:04 ` Duc Dang 0 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2016-02-08 22:04 UTC (permalink / raw) To: Jassi Brar, Rob Herring Cc: Paul Bolle, devicetree, linux-arm-kernel, linux-kernel, patches, Duc Dang, Feng Kan X-Gene mailbox controller provides 8 mailbox channels, with each channel has a dedicated interrupt line. Signed-off-by: Feng Kan <fkan@apm.com> Signed-off-by: Duc Dang <dhdang@apm.com> --- Changes since v4: - Rebase over v4.5-rc1 - Fix section mistmatch warning by removing __init in slimpro_mbox_probe declaration - Correctly print channel number when there is no IRQ for that channel Changes since v3: - Rebase over v4.4 - Remove 'id' in slimpro_mbox_chan structure - Remove small functions that are only called once and fold them into the other callers - Remove void* pointer type cast - Relax the number of mailbox IRQs condition - Use subsys_initcall to guarantee mailbox driver will be registered before any other dependent driver is loaded. drivers/mailbox/Kconfig | 9 ++ drivers/mailbox/Makefile | 2 + drivers/mailbox/mailbox-xgene-slimpro.c | 264 ++++++++++++++++++++++++++++++++ 3 files changed, 275 insertions(+) create mode 100644 drivers/mailbox/mailbox-xgene-slimpro.c diff --git a/drivers/mailbox/Kconfig b/drivers/mailbox/Kconfig index 546d05f..678e434 100644 --- a/drivers/mailbox/Kconfig +++ b/drivers/mailbox/Kconfig @@ -85,4 +85,13 @@ config MAILBOX_TEST Test client to help with testing new Controller driver implementations. +config XGENE_SLIMPRO_MBOX + tristate "APM SoC X-Gene SLIMpro Mailbox Controller" + depends on ARCH_XGENE + help + An implementation of the APM X-Gene Interprocessor Communication + Mailbox (IPCM) between the ARM 64-bit cores and SLIMpro controller. + It is used to send short messages between ARM64-bit cores and + the SLIMpro Management Engine, primarily for PM. Say Y here if you + want to use the APM X-Gene SLIMpro IPCM support. endif diff --git a/drivers/mailbox/Makefile b/drivers/mailbox/Makefile index 92435ef..b602ef8 100644 --- a/drivers/mailbox/Makefile +++ b/drivers/mailbox/Makefile @@ -17,3 +17,5 @@ obj-$(CONFIG_ALTERA_MBOX) += mailbox-altera.o obj-$(CONFIG_BCM2835_MBOX) += bcm2835-mailbox.o obj-$(CONFIG_STI_MBOX) += mailbox-sti.o + +obj-$(CONFIG_XGENE_SLIMPRO_MBOX) += mailbox-xgene-slimpro.o diff --git a/drivers/mailbox/mailbox-xgene-slimpro.c b/drivers/mailbox/mailbox-xgene-slimpro.c new file mode 100644 index 0000000..0ea1eb8 --- /dev/null +++ b/drivers/mailbox/mailbox-xgene-slimpro.c @@ -0,0 +1,264 @@ +/* + * APM X-Gene SLIMpro MailBox Driver + * + * Copyright (c) 2015, Applied Micro Circuits Corporation + * Author: Feng Kan fkan@apm.com + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <http://www.gnu.org/licenses/>. + * + */ +#include <linux/acpi.h> +#include <linux/delay.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/mailbox_controller.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/spinlock.h> + +#define MBOX_CON_NAME "slimpro-mbox" +#define MBOX_REG_SET_OFFSET 0x1000 +#define MBOX_CNT 8 +#define MBOX_STATUS_AVAIL_MASK BIT(16) +#define MBOX_STATUS_ACK_MASK BIT(0) + +/* Configuration and Status Registers */ +#define REG_DB_IN 0x00 +#define REG_DB_DIN0 0x04 +#define REG_DB_DIN1 0x08 +#define REG_DB_OUT 0x10 +#define REG_DB_DOUT0 0x14 +#define REG_DB_DOUT1 0x18 +#define REG_DB_STAT 0x20 +#define REG_DB_STATMASK 0x24 + +struct slimpro_mbox_chan { + struct device *dev; + struct mbox_chan *chan; + void __iomem *reg; + int irq; + u32 rx_msg[3]; +}; + +struct slimpro_mbox { + struct mbox_controller mb_ctrl; + struct slimpro_mbox_chan mc[MBOX_CNT]; + struct mbox_chan chans[MBOX_CNT]; +}; + +static void mb_chan_send_msg(struct slimpro_mbox_chan *mb_chan, u32 *msg) +{ + writel(msg[1], mb_chan->reg + REG_DB_DOUT0); + writel(msg[2], mb_chan->reg + REG_DB_DOUT1); + writel(msg[0], mb_chan->reg + REG_DB_OUT); +} + +static void mb_chan_recv_msg(struct slimpro_mbox_chan *mb_chan) +{ + mb_chan->rx_msg[1] = readl(mb_chan->reg + REG_DB_DIN0); + mb_chan->rx_msg[2] = readl(mb_chan->reg + REG_DB_DIN1); + mb_chan->rx_msg[0] = readl(mb_chan->reg + REG_DB_IN); +} + +static int mb_chan_status_ack(struct slimpro_mbox_chan *mb_chan) +{ + u32 val = readl(mb_chan->reg + REG_DB_STAT); + + if (val & MBOX_STATUS_ACK_MASK) { + writel(MBOX_STATUS_ACK_MASK, mb_chan->reg + REG_DB_STAT); + return 1; + } + return 0; +} + +static int mb_chan_status_avail(struct slimpro_mbox_chan *mb_chan) +{ + u32 val = readl(mb_chan->reg + REG_DB_STAT); + + if (val & MBOX_STATUS_AVAIL_MASK) { + mb_chan_recv_msg(mb_chan); + writel(MBOX_STATUS_AVAIL_MASK, mb_chan->reg + REG_DB_STAT); + return 1; + } + return 0; +} + +static irqreturn_t slimpro_mbox_irq(int irq, void *id) +{ + struct slimpro_mbox_chan *mb_chan = id; + + if (mb_chan_status_ack(mb_chan)) + mbox_chan_txdone(mb_chan->chan, 0); + + if (mb_chan_status_avail(mb_chan)) + mbox_chan_received_data(mb_chan->chan, mb_chan->rx_msg); + + return IRQ_HANDLED; +} + +static int slimpro_mbox_send_data(struct mbox_chan *chan, void *msg) +{ + struct slimpro_mbox_chan *mb_chan = chan->con_priv; + + mb_chan_send_msg(mb_chan, msg); + return 0; +} + +static int slimpro_mbox_startup(struct mbox_chan *chan) +{ + struct slimpro_mbox_chan *mb_chan = chan->con_priv; + int rc; + u32 val; + + rc = devm_request_irq(mb_chan->dev, mb_chan->irq, slimpro_mbox_irq, 0, + MBOX_CON_NAME, mb_chan); + if (unlikely(rc)) { + dev_err(mb_chan->dev, "failed to register mailbox interrupt %d\n", + mb_chan->irq); + return rc; + } + + /* Enable HW interrupt */ + writel(MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK, + mb_chan->reg + REG_DB_STAT); + /* Unmask doorbell status interrupt */ + val = readl(mb_chan->reg + REG_DB_STATMASK); + val &= ~(MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK); + writel(val, mb_chan->reg + REG_DB_STATMASK); + + return 0; +} + +static void slimpro_mbox_shutdown(struct mbox_chan *chan) +{ + struct slimpro_mbox_chan *mb_chan = chan->con_priv; + u32 val; + + /* Mask doorbell status interrupt */ + val = readl(mb_chan->reg + REG_DB_STATMASK); + val |= (MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK); + writel(val, mb_chan->reg + REG_DB_STATMASK); + + devm_free_irq(mb_chan->dev, mb_chan->irq, mb_chan); +} + +static struct mbox_chan_ops slimpro_mbox_ops = { + .send_data = slimpro_mbox_send_data, + .startup = slimpro_mbox_startup, + .shutdown = slimpro_mbox_shutdown, +}; + +static int slimpro_mbox_probe(struct platform_device *pdev) +{ + struct slimpro_mbox *ctx; + struct resource *regs; + void __iomem *mb_base; + int rc; + int i; + + ctx = devm_kzalloc(&pdev->dev, sizeof(struct slimpro_mbox), GFP_KERNEL); + if (IS_ERR(ctx)) + return PTR_ERR(ctx); + + platform_set_drvdata(pdev, ctx); + + regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); + mb_base = devm_ioremap(&pdev->dev, regs->start, resource_size(regs)); + if (IS_ERR(mb_base)) + return PTR_ERR(mb_base); + + /* Setup mailbox links */ + for (i = 0; i < MBOX_CNT; i++) { + ctx->mc[i].irq = platform_get_irq(pdev, i); + if (ctx->mc[i].irq < 0) { + if (i == 0) { + dev_err(&pdev->dev, "no available IRQ\n"); + return -EINVAL; + } + dev_info(&pdev->dev, "no IRQ for channel %d\n", i); + break; + } + + ctx->mc[i].dev = &pdev->dev; + ctx->mc[i].reg = mb_base + i * MBOX_REG_SET_OFFSET; + ctx->mc[i].chan = &ctx->chans[i]; + ctx->chans[i].con_priv = &ctx->mc[i]; + } + + /* Setup mailbox controller */ + ctx->mb_ctrl.dev = &pdev->dev; + ctx->mb_ctrl.chans = ctx->chans; + ctx->mb_ctrl.txdone_irq = true; + ctx->mb_ctrl.ops = &slimpro_mbox_ops; + ctx->mb_ctrl.num_chans = i; + + rc = mbox_controller_register(&ctx->mb_ctrl); + if (rc) { + dev_err(&pdev->dev, + "APM X-Gene SLIMpro MailBox register failed:%d\n", rc); + return rc; + } + + dev_info(&pdev->dev, "APM X-Gene SLIMpro MailBox registered\n"); + return 0; +} + +static int slimpro_mbox_remove(struct platform_device *pdev) +{ + struct slimpro_mbox *smb = platform_get_drvdata(pdev); + + mbox_controller_unregister(&smb->mb_ctrl); + return 0; +} + +static const struct of_device_id slimpro_of_match[] = { + {.compatible = "apm,xgene-slimpro-mbox" }, + { }, +}; +MODULE_DEVICE_TABLE(of, slimpro_of_match); + +#ifdef CONFIG_ACPI +static const struct acpi_device_id slimpro_acpi_ids[] = { + {"APMC0D01", 0}, + {} +}; +MODULE_DEVICE_TABLE(acpi, slimpro_acpi_ids); +#endif + +static struct platform_driver slimpro_mbox_driver = { + .probe = slimpro_mbox_probe, + .remove = slimpro_mbox_remove, + .driver = { + .name = "xgene-slimpro-mbox", + .of_match_table = of_match_ptr(slimpro_of_match), + .acpi_match_table = ACPI_PTR(slimpro_acpi_ids) + }, +}; + +static int __init slimpro_mbox_init(void) +{ + return platform_driver_register(&slimpro_mbox_driver); +} + +static void __exit slimpro_mbox_exit(void) +{ + platform_driver_unregister(&slimpro_mbox_driver); +} + +subsys_initcall(slimpro_mbox_init); +module_exit(slimpro_mbox_exit); + +MODULE_DESCRIPTION("APM X-Gene SLIMpro Mailbox Driver"); +MODULE_LICENSE("GPL"); -- 1.9.1 ^ permalink raw reply related [flat|nested] 95+ messages in thread
* [PATCH v5 1/3] mailbox: Add support for APM X-Gene platform mailbox driver 2016-02-08 22:04 ` Duc Dang @ 2016-02-09 16:40 ` Mathieu Poirier -1 siblings, 0 replies; 95+ messages in thread From: Mathieu Poirier @ 2016-02-09 16:40 UTC (permalink / raw) To: linux-arm-kernel On 8 February 2016 at 15:04, Duc Dang <dhdang@apm.com> wrote: > X-Gene mailbox controller provides 8 mailbox channels, with > each channel has a dedicated interrupt line. > > Signed-off-by: Feng Kan <fkan@apm.com> > Signed-off-by: Duc Dang <dhdang@apm.com> > --- > Changes since v4: > - Rebase over v4.5-rc1 > - Fix section mistmatch warning by removing > __init in slimpro_mbox_probe declaration > - Correctly print channel number when > there is no IRQ for that channel > > Changes since v3: > - Rebase over v4.4 > - Remove 'id' in slimpro_mbox_chan structure > - Remove small functions that are only called once > and fold them into the other callers > - Remove void* pointer type cast > - Relax the number of mailbox IRQs condition > - Use subsys_initcall to guarantee mailbox driver > will be registered before any other dependent driver > is loaded. > > drivers/mailbox/Kconfig | 9 ++ > drivers/mailbox/Makefile | 2 + > drivers/mailbox/mailbox-xgene-slimpro.c | 264 ++++++++++++++++++++++++++++++++ > 3 files changed, 275 insertions(+) > create mode 100644 drivers/mailbox/mailbox-xgene-slimpro.c > > diff --git a/drivers/mailbox/Kconfig b/drivers/mailbox/Kconfig > index 546d05f..678e434 100644 > --- a/drivers/mailbox/Kconfig > +++ b/drivers/mailbox/Kconfig > @@ -85,4 +85,13 @@ config MAILBOX_TEST > Test client to help with testing new Controller driver > implementations. > > +config XGENE_SLIMPRO_MBOX > + tristate "APM SoC X-Gene SLIMpro Mailbox Controller" > + depends on ARCH_XGENE > + help > + An implementation of the APM X-Gene Interprocessor Communication > + Mailbox (IPCM) between the ARM 64-bit cores and SLIMpro controller. > + It is used to send short messages between ARM64-bit cores and > + the SLIMpro Management Engine, primarily for PM. Say Y here if you > + want to use the APM X-Gene SLIMpro IPCM support. > endif > diff --git a/drivers/mailbox/Makefile b/drivers/mailbox/Makefile > index 92435ef..b602ef8 100644 > --- a/drivers/mailbox/Makefile > +++ b/drivers/mailbox/Makefile > @@ -17,3 +17,5 @@ obj-$(CONFIG_ALTERA_MBOX) += mailbox-altera.o > obj-$(CONFIG_BCM2835_MBOX) += bcm2835-mailbox.o > > obj-$(CONFIG_STI_MBOX) += mailbox-sti.o > + > +obj-$(CONFIG_XGENE_SLIMPRO_MBOX) += mailbox-xgene-slimpro.o > diff --git a/drivers/mailbox/mailbox-xgene-slimpro.c b/drivers/mailbox/mailbox-xgene-slimpro.c > new file mode 100644 > index 0000000..0ea1eb8 > --- /dev/null > +++ b/drivers/mailbox/mailbox-xgene-slimpro.c > @@ -0,0 +1,264 @@ > +/* > + * APM X-Gene SLIMpro MailBox Driver > + * > + * Copyright (c) 2015, Applied Micro Circuits Corporation > + * Author: Feng Kan fkan at apm.com > + * > + * This program is free software; you can redistribute it and/or > + * modify it under the terms of the GNU General Public License as > + * published by the Free Software Foundation; either version 2 of > + * the License, or (at your option) any later version. > + * > + * This program is distributed in the hope that it will be useful, > + * but WITHOUT ANY WARRANTY; without even the implied warranty of > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > + * GNU General Public License for more details. > + * > + * You should have received a copy of the GNU General Public License > + * along with this program; if not, see <http://www.gnu.org/licenses/>. > + * > + */ > +#include <linux/acpi.h> > +#include <linux/delay.h> > +#include <linux/interrupt.h> > +#include <linux/io.h> > +#include <linux/mailbox_controller.h> > +#include <linux/module.h> > +#include <linux/of.h> > +#include <linux/platform_device.h> > +#include <linux/spinlock.h> > + > +#define MBOX_CON_NAME "slimpro-mbox" > +#define MBOX_REG_SET_OFFSET 0x1000 > +#define MBOX_CNT 8 > +#define MBOX_STATUS_AVAIL_MASK BIT(16) > +#define MBOX_STATUS_ACK_MASK BIT(0) > + > +/* Configuration and Status Registers */ > +#define REG_DB_IN 0x00 > +#define REG_DB_DIN0 0x04 > +#define REG_DB_DIN1 0x08 > +#define REG_DB_OUT 0x10 > +#define REG_DB_DOUT0 0x14 > +#define REG_DB_DOUT1 0x18 > +#define REG_DB_STAT 0x20 > +#define REG_DB_STATMASK 0x24 > + > +struct slimpro_mbox_chan { > + struct device *dev; > + struct mbox_chan *chan; > + void __iomem *reg; > + int irq; > + u32 rx_msg[3]; > +}; > + > +struct slimpro_mbox { > + struct mbox_controller mb_ctrl; > + struct slimpro_mbox_chan mc[MBOX_CNT]; > + struct mbox_chan chans[MBOX_CNT]; > +}; The above two structure declaration could use kernel style documentation. > + > +static void mb_chan_send_msg(struct slimpro_mbox_chan *mb_chan, u32 *msg) > +{ > + writel(msg[1], mb_chan->reg + REG_DB_DOUT0); > + writel(msg[2], mb_chan->reg + REG_DB_DOUT1); > + writel(msg[0], mb_chan->reg + REG_DB_OUT); > +} > + > +static void mb_chan_recv_msg(struct slimpro_mbox_chan *mb_chan) > +{ > + mb_chan->rx_msg[1] = readl(mb_chan->reg + REG_DB_DIN0); > + mb_chan->rx_msg[2] = readl(mb_chan->reg + REG_DB_DIN1); > + mb_chan->rx_msg[0] = readl(mb_chan->reg + REG_DB_IN); > +} Is there a requirement that operations in the above two functions be ordered? If not significant gains could be achieved by using writel/readl_relaxed(). Same comment for the rest of this driver. Thanks, Mathieu > + > +static int mb_chan_status_ack(struct slimpro_mbox_chan *mb_chan) > +{ > + u32 val = readl(mb_chan->reg + REG_DB_STAT); > + > + if (val & MBOX_STATUS_ACK_MASK) { > + writel(MBOX_STATUS_ACK_MASK, mb_chan->reg + REG_DB_STAT); > + return 1; > + } > + return 0; > +} > + > +static int mb_chan_status_avail(struct slimpro_mbox_chan *mb_chan) > +{ > + u32 val = readl(mb_chan->reg + REG_DB_STAT); > + > + if (val & MBOX_STATUS_AVAIL_MASK) { > + mb_chan_recv_msg(mb_chan); > + writel(MBOX_STATUS_AVAIL_MASK, mb_chan->reg + REG_DB_STAT); > + return 1; > + } > + return 0; > +} > + > +static irqreturn_t slimpro_mbox_irq(int irq, void *id) > +{ > + struct slimpro_mbox_chan *mb_chan = id; > + > + if (mb_chan_status_ack(mb_chan)) > + mbox_chan_txdone(mb_chan->chan, 0); > + > + if (mb_chan_status_avail(mb_chan)) > + mbox_chan_received_data(mb_chan->chan, mb_chan->rx_msg); > + > + return IRQ_HANDLED; > +} > + > +static int slimpro_mbox_send_data(struct mbox_chan *chan, void *msg) > +{ > + struct slimpro_mbox_chan *mb_chan = chan->con_priv; > + > + mb_chan_send_msg(mb_chan, msg); > + return 0; > +} > + > +static int slimpro_mbox_startup(struct mbox_chan *chan) > +{ > + struct slimpro_mbox_chan *mb_chan = chan->con_priv; > + int rc; > + u32 val; > + > + rc = devm_request_irq(mb_chan->dev, mb_chan->irq, slimpro_mbox_irq, 0, > + MBOX_CON_NAME, mb_chan); > + if (unlikely(rc)) { > + dev_err(mb_chan->dev, "failed to register mailbox interrupt %d\n", > + mb_chan->irq); > + return rc; > + } > + > + /* Enable HW interrupt */ > + writel(MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK, > + mb_chan->reg + REG_DB_STAT); > + /* Unmask doorbell status interrupt */ > + val = readl(mb_chan->reg + REG_DB_STATMASK); > + val &= ~(MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK); > + writel(val, mb_chan->reg + REG_DB_STATMASK); > + > + return 0; > +} > + > +static void slimpro_mbox_shutdown(struct mbox_chan *chan) > +{ > + struct slimpro_mbox_chan *mb_chan = chan->con_priv; > + u32 val; > + > + /* Mask doorbell status interrupt */ > + val = readl(mb_chan->reg + REG_DB_STATMASK); > + val |= (MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK); > + writel(val, mb_chan->reg + REG_DB_STATMASK); > + > + devm_free_irq(mb_chan->dev, mb_chan->irq, mb_chan); > +} > + > +static struct mbox_chan_ops slimpro_mbox_ops = { > + .send_data = slimpro_mbox_send_data, > + .startup = slimpro_mbox_startup, > + .shutdown = slimpro_mbox_shutdown, > +}; > + > +static int slimpro_mbox_probe(struct platform_device *pdev) > +{ > + struct slimpro_mbox *ctx; > + struct resource *regs; > + void __iomem *mb_base; > + int rc; > + int i; > + > + ctx = devm_kzalloc(&pdev->dev, sizeof(struct slimpro_mbox), GFP_KERNEL); > + if (IS_ERR(ctx)) > + return PTR_ERR(ctx); > + > + platform_set_drvdata(pdev, ctx); > + > + regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); > + mb_base = devm_ioremap(&pdev->dev, regs->start, resource_size(regs)); > + if (IS_ERR(mb_base)) > + return PTR_ERR(mb_base); > + > + /* Setup mailbox links */ > + for (i = 0; i < MBOX_CNT; i++) { > + ctx->mc[i].irq = platform_get_irq(pdev, i); > + if (ctx->mc[i].irq < 0) { > + if (i == 0) { > + dev_err(&pdev->dev, "no available IRQ\n"); > + return -EINVAL; > + } > + dev_info(&pdev->dev, "no IRQ for channel %d\n", i); > + break; > + } > + > + ctx->mc[i].dev = &pdev->dev; > + ctx->mc[i].reg = mb_base + i * MBOX_REG_SET_OFFSET; > + ctx->mc[i].chan = &ctx->chans[i]; > + ctx->chans[i].con_priv = &ctx->mc[i]; > + } > + > + /* Setup mailbox controller */ > + ctx->mb_ctrl.dev = &pdev->dev; > + ctx->mb_ctrl.chans = ctx->chans; > + ctx->mb_ctrl.txdone_irq = true; > + ctx->mb_ctrl.ops = &slimpro_mbox_ops; > + ctx->mb_ctrl.num_chans = i; > + > + rc = mbox_controller_register(&ctx->mb_ctrl); > + if (rc) { > + dev_err(&pdev->dev, > + "APM X-Gene SLIMpro MailBox register failed:%d\n", rc); > + return rc; > + } > + > + dev_info(&pdev->dev, "APM X-Gene SLIMpro MailBox registered\n"); > + return 0; > +} > + > +static int slimpro_mbox_remove(struct platform_device *pdev) > +{ > + struct slimpro_mbox *smb = platform_get_drvdata(pdev); > + > + mbox_controller_unregister(&smb->mb_ctrl); > + return 0; > +} > + > +static const struct of_device_id slimpro_of_match[] = { > + {.compatible = "apm,xgene-slimpro-mbox" }, > + { }, > +}; > +MODULE_DEVICE_TABLE(of, slimpro_of_match); > + > +#ifdef CONFIG_ACPI > +static const struct acpi_device_id slimpro_acpi_ids[] = { > + {"APMC0D01", 0}, > + {} > +}; > +MODULE_DEVICE_TABLE(acpi, slimpro_acpi_ids); > +#endif > + > +static struct platform_driver slimpro_mbox_driver = { > + .probe = slimpro_mbox_probe, > + .remove = slimpro_mbox_remove, > + .driver = { > + .name = "xgene-slimpro-mbox", > + .of_match_table = of_match_ptr(slimpro_of_match), > + .acpi_match_table = ACPI_PTR(slimpro_acpi_ids) > + }, > +}; > + > +static int __init slimpro_mbox_init(void) > +{ > + return platform_driver_register(&slimpro_mbox_driver); > +} > + > +static void __exit slimpro_mbox_exit(void) > +{ > + platform_driver_unregister(&slimpro_mbox_driver); > +} > + > +subsys_initcall(slimpro_mbox_init); > +module_exit(slimpro_mbox_exit); > + > +MODULE_DESCRIPTION("APM X-Gene SLIMpro Mailbox Driver"); > +MODULE_LICENSE("GPL"); > -- > 1.9.1 > ^ permalink raw reply [flat|nested] 95+ messages in thread
* Re: [PATCH v5 1/3] mailbox: Add support for APM X-Gene platform mailbox driver @ 2016-02-09 16:40 ` Mathieu Poirier 0 siblings, 0 replies; 95+ messages in thread From: Mathieu Poirier @ 2016-02-09 16:40 UTC (permalink / raw) To: Duc Dang Cc: Jassi Brar, Rob Herring, Paul Bolle, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, patches, Feng Kan On 8 February 2016 at 15:04, Duc Dang <dhdang@apm.com> wrote: > X-Gene mailbox controller provides 8 mailbox channels, with > each channel has a dedicated interrupt line. > > Signed-off-by: Feng Kan <fkan@apm.com> > Signed-off-by: Duc Dang <dhdang@apm.com> > --- > Changes since v4: > - Rebase over v4.5-rc1 > - Fix section mistmatch warning by removing > __init in slimpro_mbox_probe declaration > - Correctly print channel number when > there is no IRQ for that channel > > Changes since v3: > - Rebase over v4.4 > - Remove 'id' in slimpro_mbox_chan structure > - Remove small functions that are only called once > and fold them into the other callers > - Remove void* pointer type cast > - Relax the number of mailbox IRQs condition > - Use subsys_initcall to guarantee mailbox driver > will be registered before any other dependent driver > is loaded. > > drivers/mailbox/Kconfig | 9 ++ > drivers/mailbox/Makefile | 2 + > drivers/mailbox/mailbox-xgene-slimpro.c | 264 ++++++++++++++++++++++++++++++++ > 3 files changed, 275 insertions(+) > create mode 100644 drivers/mailbox/mailbox-xgene-slimpro.c > > diff --git a/drivers/mailbox/Kconfig b/drivers/mailbox/Kconfig > index 546d05f..678e434 100644 > --- a/drivers/mailbox/Kconfig > +++ b/drivers/mailbox/Kconfig > @@ -85,4 +85,13 @@ config MAILBOX_TEST > Test client to help with testing new Controller driver > implementations. > > +config XGENE_SLIMPRO_MBOX > + tristate "APM SoC X-Gene SLIMpro Mailbox Controller" > + depends on ARCH_XGENE > + help > + An implementation of the APM X-Gene Interprocessor Communication > + Mailbox (IPCM) between the ARM 64-bit cores and SLIMpro controller. > + It is used to send short messages between ARM64-bit cores and > + the SLIMpro Management Engine, primarily for PM. Say Y here if you > + want to use the APM X-Gene SLIMpro IPCM support. > endif > diff --git a/drivers/mailbox/Makefile b/drivers/mailbox/Makefile > index 92435ef..b602ef8 100644 > --- a/drivers/mailbox/Makefile > +++ b/drivers/mailbox/Makefile > @@ -17,3 +17,5 @@ obj-$(CONFIG_ALTERA_MBOX) += mailbox-altera.o > obj-$(CONFIG_BCM2835_MBOX) += bcm2835-mailbox.o > > obj-$(CONFIG_STI_MBOX) += mailbox-sti.o > + > +obj-$(CONFIG_XGENE_SLIMPRO_MBOX) += mailbox-xgene-slimpro.o > diff --git a/drivers/mailbox/mailbox-xgene-slimpro.c b/drivers/mailbox/mailbox-xgene-slimpro.c > new file mode 100644 > index 0000000..0ea1eb8 > --- /dev/null > +++ b/drivers/mailbox/mailbox-xgene-slimpro.c > @@ -0,0 +1,264 @@ > +/* > + * APM X-Gene SLIMpro MailBox Driver > + * > + * Copyright (c) 2015, Applied Micro Circuits Corporation > + * Author: Feng Kan fkan@apm.com > + * > + * This program is free software; you can redistribute it and/or > + * modify it under the terms of the GNU General Public License as > + * published by the Free Software Foundation; either version 2 of > + * the License, or (at your option) any later version. > + * > + * This program is distributed in the hope that it will be useful, > + * but WITHOUT ANY WARRANTY; without even the implied warranty of > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > + * GNU General Public License for more details. > + * > + * You should have received a copy of the GNU General Public License > + * along with this program; if not, see <http://www.gnu.org/licenses/>. > + * > + */ > +#include <linux/acpi.h> > +#include <linux/delay.h> > +#include <linux/interrupt.h> > +#include <linux/io.h> > +#include <linux/mailbox_controller.h> > +#include <linux/module.h> > +#include <linux/of.h> > +#include <linux/platform_device.h> > +#include <linux/spinlock.h> > + > +#define MBOX_CON_NAME "slimpro-mbox" > +#define MBOX_REG_SET_OFFSET 0x1000 > +#define MBOX_CNT 8 > +#define MBOX_STATUS_AVAIL_MASK BIT(16) > +#define MBOX_STATUS_ACK_MASK BIT(0) > + > +/* Configuration and Status Registers */ > +#define REG_DB_IN 0x00 > +#define REG_DB_DIN0 0x04 > +#define REG_DB_DIN1 0x08 > +#define REG_DB_OUT 0x10 > +#define REG_DB_DOUT0 0x14 > +#define REG_DB_DOUT1 0x18 > +#define REG_DB_STAT 0x20 > +#define REG_DB_STATMASK 0x24 > + > +struct slimpro_mbox_chan { > + struct device *dev; > + struct mbox_chan *chan; > + void __iomem *reg; > + int irq; > + u32 rx_msg[3]; > +}; > + > +struct slimpro_mbox { > + struct mbox_controller mb_ctrl; > + struct slimpro_mbox_chan mc[MBOX_CNT]; > + struct mbox_chan chans[MBOX_CNT]; > +}; The above two structure declaration could use kernel style documentation. > + > +static void mb_chan_send_msg(struct slimpro_mbox_chan *mb_chan, u32 *msg) > +{ > + writel(msg[1], mb_chan->reg + REG_DB_DOUT0); > + writel(msg[2], mb_chan->reg + REG_DB_DOUT1); > + writel(msg[0], mb_chan->reg + REG_DB_OUT); > +} > + > +static void mb_chan_recv_msg(struct slimpro_mbox_chan *mb_chan) > +{ > + mb_chan->rx_msg[1] = readl(mb_chan->reg + REG_DB_DIN0); > + mb_chan->rx_msg[2] = readl(mb_chan->reg + REG_DB_DIN1); > + mb_chan->rx_msg[0] = readl(mb_chan->reg + REG_DB_IN); > +} Is there a requirement that operations in the above two functions be ordered? If not significant gains could be achieved by using writel/readl_relaxed(). Same comment for the rest of this driver. Thanks, Mathieu > + > +static int mb_chan_status_ack(struct slimpro_mbox_chan *mb_chan) > +{ > + u32 val = readl(mb_chan->reg + REG_DB_STAT); > + > + if (val & MBOX_STATUS_ACK_MASK) { > + writel(MBOX_STATUS_ACK_MASK, mb_chan->reg + REG_DB_STAT); > + return 1; > + } > + return 0; > +} > + > +static int mb_chan_status_avail(struct slimpro_mbox_chan *mb_chan) > +{ > + u32 val = readl(mb_chan->reg + REG_DB_STAT); > + > + if (val & MBOX_STATUS_AVAIL_MASK) { > + mb_chan_recv_msg(mb_chan); > + writel(MBOX_STATUS_AVAIL_MASK, mb_chan->reg + REG_DB_STAT); > + return 1; > + } > + return 0; > +} > + > +static irqreturn_t slimpro_mbox_irq(int irq, void *id) > +{ > + struct slimpro_mbox_chan *mb_chan = id; > + > + if (mb_chan_status_ack(mb_chan)) > + mbox_chan_txdone(mb_chan->chan, 0); > + > + if (mb_chan_status_avail(mb_chan)) > + mbox_chan_received_data(mb_chan->chan, mb_chan->rx_msg); > + > + return IRQ_HANDLED; > +} > + > +static int slimpro_mbox_send_data(struct mbox_chan *chan, void *msg) > +{ > + struct slimpro_mbox_chan *mb_chan = chan->con_priv; > + > + mb_chan_send_msg(mb_chan, msg); > + return 0; > +} > + > +static int slimpro_mbox_startup(struct mbox_chan *chan) > +{ > + struct slimpro_mbox_chan *mb_chan = chan->con_priv; > + int rc; > + u32 val; > + > + rc = devm_request_irq(mb_chan->dev, mb_chan->irq, slimpro_mbox_irq, 0, > + MBOX_CON_NAME, mb_chan); > + if (unlikely(rc)) { > + dev_err(mb_chan->dev, "failed to register mailbox interrupt %d\n", > + mb_chan->irq); > + return rc; > + } > + > + /* Enable HW interrupt */ > + writel(MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK, > + mb_chan->reg + REG_DB_STAT); > + /* Unmask doorbell status interrupt */ > + val = readl(mb_chan->reg + REG_DB_STATMASK); > + val &= ~(MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK); > + writel(val, mb_chan->reg + REG_DB_STATMASK); > + > + return 0; > +} > + > +static void slimpro_mbox_shutdown(struct mbox_chan *chan) > +{ > + struct slimpro_mbox_chan *mb_chan = chan->con_priv; > + u32 val; > + > + /* Mask doorbell status interrupt */ > + val = readl(mb_chan->reg + REG_DB_STATMASK); > + val |= (MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK); > + writel(val, mb_chan->reg + REG_DB_STATMASK); > + > + devm_free_irq(mb_chan->dev, mb_chan->irq, mb_chan); > +} > + > +static struct mbox_chan_ops slimpro_mbox_ops = { > + .send_data = slimpro_mbox_send_data, > + .startup = slimpro_mbox_startup, > + .shutdown = slimpro_mbox_shutdown, > +}; > + > +static int slimpro_mbox_probe(struct platform_device *pdev) > +{ > + struct slimpro_mbox *ctx; > + struct resource *regs; > + void __iomem *mb_base; > + int rc; > + int i; > + > + ctx = devm_kzalloc(&pdev->dev, sizeof(struct slimpro_mbox), GFP_KERNEL); > + if (IS_ERR(ctx)) > + return PTR_ERR(ctx); > + > + platform_set_drvdata(pdev, ctx); > + > + regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); > + mb_base = devm_ioremap(&pdev->dev, regs->start, resource_size(regs)); > + if (IS_ERR(mb_base)) > + return PTR_ERR(mb_base); > + > + /* Setup mailbox links */ > + for (i = 0; i < MBOX_CNT; i++) { > + ctx->mc[i].irq = platform_get_irq(pdev, i); > + if (ctx->mc[i].irq < 0) { > + if (i == 0) { > + dev_err(&pdev->dev, "no available IRQ\n"); > + return -EINVAL; > + } > + dev_info(&pdev->dev, "no IRQ for channel %d\n", i); > + break; > + } > + > + ctx->mc[i].dev = &pdev->dev; > + ctx->mc[i].reg = mb_base + i * MBOX_REG_SET_OFFSET; > + ctx->mc[i].chan = &ctx->chans[i]; > + ctx->chans[i].con_priv = &ctx->mc[i]; > + } > + > + /* Setup mailbox controller */ > + ctx->mb_ctrl.dev = &pdev->dev; > + ctx->mb_ctrl.chans = ctx->chans; > + ctx->mb_ctrl.txdone_irq = true; > + ctx->mb_ctrl.ops = &slimpro_mbox_ops; > + ctx->mb_ctrl.num_chans = i; > + > + rc = mbox_controller_register(&ctx->mb_ctrl); > + if (rc) { > + dev_err(&pdev->dev, > + "APM X-Gene SLIMpro MailBox register failed:%d\n", rc); > + return rc; > + } > + > + dev_info(&pdev->dev, "APM X-Gene SLIMpro MailBox registered\n"); > + return 0; > +} > + > +static int slimpro_mbox_remove(struct platform_device *pdev) > +{ > + struct slimpro_mbox *smb = platform_get_drvdata(pdev); > + > + mbox_controller_unregister(&smb->mb_ctrl); > + return 0; > +} > + > +static const struct of_device_id slimpro_of_match[] = { > + {.compatible = "apm,xgene-slimpro-mbox" }, > + { }, > +}; > +MODULE_DEVICE_TABLE(of, slimpro_of_match); > + > +#ifdef CONFIG_ACPI > +static const struct acpi_device_id slimpro_acpi_ids[] = { > + {"APMC0D01", 0}, > + {} > +}; > +MODULE_DEVICE_TABLE(acpi, slimpro_acpi_ids); > +#endif > + > +static struct platform_driver slimpro_mbox_driver = { > + .probe = slimpro_mbox_probe, > + .remove = slimpro_mbox_remove, > + .driver = { > + .name = "xgene-slimpro-mbox", > + .of_match_table = of_match_ptr(slimpro_of_match), > + .acpi_match_table = ACPI_PTR(slimpro_acpi_ids) > + }, > +}; > + > +static int __init slimpro_mbox_init(void) > +{ > + return platform_driver_register(&slimpro_mbox_driver); > +} > + > +static void __exit slimpro_mbox_exit(void) > +{ > + platform_driver_unregister(&slimpro_mbox_driver); > +} > + > +subsys_initcall(slimpro_mbox_init); > +module_exit(slimpro_mbox_exit); > + > +MODULE_DESCRIPTION("APM X-Gene SLIMpro Mailbox Driver"); > +MODULE_LICENSE("GPL"); > -- > 1.9.1 > ^ permalink raw reply [flat|nested] 95+ messages in thread
* [PATCH v5 1/3] mailbox: Add support for APM X-Gene platform mailbox driver 2016-02-09 16:40 ` Mathieu Poirier @ 2016-02-10 3:46 ` Duc Dang -1 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2016-02-10 3:46 UTC (permalink / raw) To: linux-arm-kernel On Tue, Feb 9, 2016 at 8:40 AM, Mathieu Poirier <mathieu.poirier@linaro.org> wrote: > On 8 February 2016 at 15:04, Duc Dang <dhdang@apm.com> wrote: >> X-Gene mailbox controller provides 8 mailbox channels, with >> each channel has a dedicated interrupt line. >> >> Signed-off-by: Feng Kan <fkan@apm.com> >> Signed-off-by: Duc Dang <dhdang@apm.com> >> --- >> Changes since v4: >> - Rebase over v4.5-rc1 >> - Fix section mistmatch warning by removing >> __init in slimpro_mbox_probe declaration >> - Correctly print channel number when >> there is no IRQ for that channel >> >> Changes since v3: >> - Rebase over v4.4 >> - Remove 'id' in slimpro_mbox_chan structure >> - Remove small functions that are only called once >> and fold them into the other callers >> - Remove void* pointer type cast >> - Relax the number of mailbox IRQs condition >> - Use subsys_initcall to guarantee mailbox driver >> will be registered before any other dependent driver >> is loaded. >> >> drivers/mailbox/Kconfig | 9 ++ >> drivers/mailbox/Makefile | 2 + >> drivers/mailbox/mailbox-xgene-slimpro.c | 264 ++++++++++++++++++++++++++++++++ >> 3 files changed, 275 insertions(+) >> create mode 100644 drivers/mailbox/mailbox-xgene-slimpro.c >> >> diff --git a/drivers/mailbox/Kconfig b/drivers/mailbox/Kconfig >> index 546d05f..678e434 100644 >> --- a/drivers/mailbox/Kconfig >> +++ b/drivers/mailbox/Kconfig >> @@ -85,4 +85,13 @@ config MAILBOX_TEST >> Test client to help with testing new Controller driver >> implementations. >> >> +config XGENE_SLIMPRO_MBOX >> + tristate "APM SoC X-Gene SLIMpro Mailbox Controller" >> + depends on ARCH_XGENE >> + help >> + An implementation of the APM X-Gene Interprocessor Communication >> + Mailbox (IPCM) between the ARM 64-bit cores and SLIMpro controller. >> + It is used to send short messages between ARM64-bit cores and >> + the SLIMpro Management Engine, primarily for PM. Say Y here if you >> + want to use the APM X-Gene SLIMpro IPCM support. >> endif >> diff --git a/drivers/mailbox/Makefile b/drivers/mailbox/Makefile >> index 92435ef..b602ef8 100644 >> --- a/drivers/mailbox/Makefile >> +++ b/drivers/mailbox/Makefile >> @@ -17,3 +17,5 @@ obj-$(CONFIG_ALTERA_MBOX) += mailbox-altera.o >> obj-$(CONFIG_BCM2835_MBOX) += bcm2835-mailbox.o >> >> obj-$(CONFIG_STI_MBOX) += mailbox-sti.o >> + >> +obj-$(CONFIG_XGENE_SLIMPRO_MBOX) += mailbox-xgene-slimpro.o >> diff --git a/drivers/mailbox/mailbox-xgene-slimpro.c b/drivers/mailbox/mailbox-xgene-slimpro.c >> new file mode 100644 >> index 0000000..0ea1eb8 >> --- /dev/null >> +++ b/drivers/mailbox/mailbox-xgene-slimpro.c >> @@ -0,0 +1,264 @@ >> +/* >> + * APM X-Gene SLIMpro MailBox Driver >> + * >> + * Copyright (c) 2015, Applied Micro Circuits Corporation >> + * Author: Feng Kan fkan at apm.com >> + * >> + * This program is free software; you can redistribute it and/or >> + * modify it under the terms of the GNU General Public License as >> + * published by the Free Software Foundation; either version 2 of >> + * the License, or (at your option) any later version. >> + * >> + * This program is distributed in the hope that it will be useful, >> + * but WITHOUT ANY WARRANTY; without even the implied warranty of >> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the >> + * GNU General Public License for more details. >> + * >> + * You should have received a copy of the GNU General Public License >> + * along with this program; if not, see <http://www.gnu.org/licenses/>. >> + * >> + */ >> +#include <linux/acpi.h> >> +#include <linux/delay.h> >> +#include <linux/interrupt.h> >> +#include <linux/io.h> >> +#include <linux/mailbox_controller.h> >> +#include <linux/module.h> >> +#include <linux/of.h> >> +#include <linux/platform_device.h> >> +#include <linux/spinlock.h> >> + >> +#define MBOX_CON_NAME "slimpro-mbox" >> +#define MBOX_REG_SET_OFFSET 0x1000 >> +#define MBOX_CNT 8 >> +#define MBOX_STATUS_AVAIL_MASK BIT(16) >> +#define MBOX_STATUS_ACK_MASK BIT(0) >> + >> +/* Configuration and Status Registers */ >> +#define REG_DB_IN 0x00 >> +#define REG_DB_DIN0 0x04 >> +#define REG_DB_DIN1 0x08 >> +#define REG_DB_OUT 0x10 >> +#define REG_DB_DOUT0 0x14 >> +#define REG_DB_DOUT1 0x18 >> +#define REG_DB_STAT 0x20 >> +#define REG_DB_STATMASK 0x24 >> + >> +struct slimpro_mbox_chan { >> + struct device *dev; >> + struct mbox_chan *chan; >> + void __iomem *reg; >> + int irq; >> + u32 rx_msg[3]; >> +}; >> + >> +struct slimpro_mbox { >> + struct mbox_controller mb_ctrl; >> + struct slimpro_mbox_chan mc[MBOX_CNT]; >> + struct mbox_chan chans[MBOX_CNT]; >> +}; > > The above two structure declaration could use kernel style documentation. Can you please clarify or give an example? I looked into several files in drivers/mailbox/ and drivers/irqchip but could not find what I need to tweak. > >> + >> +static void mb_chan_send_msg(struct slimpro_mbox_chan *mb_chan, u32 *msg) >> +{ >> + writel(msg[1], mb_chan->reg + REG_DB_DOUT0); >> + writel(msg[2], mb_chan->reg + REG_DB_DOUT1); >> + writel(msg[0], mb_chan->reg + REG_DB_OUT); >> +} >> + >> +static void mb_chan_recv_msg(struct slimpro_mbox_chan *mb_chan) >> +{ >> + mb_chan->rx_msg[1] = readl(mb_chan->reg + REG_DB_DIN0); >> + mb_chan->rx_msg[2] = readl(mb_chan->reg + REG_DB_DIN1); >> + mb_chan->rx_msg[0] = readl(mb_chan->reg + REG_DB_IN); >> +} > > Is there a requirement that operations in the above two functions be > ordered? If not significant gains could be achieved by using > writel/readl_relaxed(). Same comment for the rest of this driver. The 'writes' need to be in order as writing to REG_DB_OUT will trigger interrupt, so I want the other 2 'writes' complete before it. After the receiver get the message, it will clear door bell available interrupt request, this will also trigger a door bell acknowledge interrupt. So the 'read' to get the message and the 'write' to clear the door bell available interrupt must be in order as well. Regards, Duc Dang. > > Thanks, > Mathieu > >> + >> +static int mb_chan_status_ack(struct slimpro_mbox_chan *mb_chan) >> +{ >> + u32 val = readl(mb_chan->reg + REG_DB_STAT); >> + >> + if (val & MBOX_STATUS_ACK_MASK) { >> + writel(MBOX_STATUS_ACK_MASK, mb_chan->reg + REG_DB_STAT); >> + return 1; >> + } >> + return 0; >> +} >> + >> +static int mb_chan_status_avail(struct slimpro_mbox_chan *mb_chan) >> +{ >> + u32 val = readl(mb_chan->reg + REG_DB_STAT); >> + >> + if (val & MBOX_STATUS_AVAIL_MASK) { >> + mb_chan_recv_msg(mb_chan); >> + writel(MBOX_STATUS_AVAIL_MASK, mb_chan->reg + REG_DB_STAT); >> + return 1; >> + } >> + return 0; >> +} >> + >> +static irqreturn_t slimpro_mbox_irq(int irq, void *id) >> +{ >> + struct slimpro_mbox_chan *mb_chan = id; >> + >> + if (mb_chan_status_ack(mb_chan)) >> + mbox_chan_txdone(mb_chan->chan, 0); >> + >> + if (mb_chan_status_avail(mb_chan)) >> + mbox_chan_received_data(mb_chan->chan, mb_chan->rx_msg); >> + >> + return IRQ_HANDLED; >> +} >> + >> +static int slimpro_mbox_send_data(struct mbox_chan *chan, void *msg) >> +{ >> + struct slimpro_mbox_chan *mb_chan = chan->con_priv; >> + >> + mb_chan_send_msg(mb_chan, msg); >> + return 0; >> +} >> + >> +static int slimpro_mbox_startup(struct mbox_chan *chan) >> +{ >> + struct slimpro_mbox_chan *mb_chan = chan->con_priv; >> + int rc; >> + u32 val; >> + >> + rc = devm_request_irq(mb_chan->dev, mb_chan->irq, slimpro_mbox_irq, 0, >> + MBOX_CON_NAME, mb_chan); >> + if (unlikely(rc)) { >> + dev_err(mb_chan->dev, "failed to register mailbox interrupt %d\n", >> + mb_chan->irq); >> + return rc; >> + } >> + >> + /* Enable HW interrupt */ >> + writel(MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK, >> + mb_chan->reg + REG_DB_STAT); >> + /* Unmask doorbell status interrupt */ >> + val = readl(mb_chan->reg + REG_DB_STATMASK); >> + val &= ~(MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK); >> + writel(val, mb_chan->reg + REG_DB_STATMASK); >> + >> + return 0; >> +} >> + >> +static void slimpro_mbox_shutdown(struct mbox_chan *chan) >> +{ >> + struct slimpro_mbox_chan *mb_chan = chan->con_priv; >> + u32 val; >> + >> + /* Mask doorbell status interrupt */ >> + val = readl(mb_chan->reg + REG_DB_STATMASK); >> + val |= (MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK); >> + writel(val, mb_chan->reg + REG_DB_STATMASK); >> + >> + devm_free_irq(mb_chan->dev, mb_chan->irq, mb_chan); >> +} >> + >> +static struct mbox_chan_ops slimpro_mbox_ops = { >> + .send_data = slimpro_mbox_send_data, >> + .startup = slimpro_mbox_startup, >> + .shutdown = slimpro_mbox_shutdown, >> +}; >> + >> +static int slimpro_mbox_probe(struct platform_device *pdev) >> +{ >> + struct slimpro_mbox *ctx; >> + struct resource *regs; >> + void __iomem *mb_base; >> + int rc; >> + int i; >> + >> + ctx = devm_kzalloc(&pdev->dev, sizeof(struct slimpro_mbox), GFP_KERNEL); >> + if (IS_ERR(ctx)) >> + return PTR_ERR(ctx); >> + >> + platform_set_drvdata(pdev, ctx); >> + >> + regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); >> + mb_base = devm_ioremap(&pdev->dev, regs->start, resource_size(regs)); >> + if (IS_ERR(mb_base)) >> + return PTR_ERR(mb_base); >> + >> + /* Setup mailbox links */ >> + for (i = 0; i < MBOX_CNT; i++) { >> + ctx->mc[i].irq = platform_get_irq(pdev, i); >> + if (ctx->mc[i].irq < 0) { >> + if (i == 0) { >> + dev_err(&pdev->dev, "no available IRQ\n"); >> + return -EINVAL; >> + } >> + dev_info(&pdev->dev, "no IRQ for channel %d\n", i); >> + break; >> + } >> + >> + ctx->mc[i].dev = &pdev->dev; >> + ctx->mc[i].reg = mb_base + i * MBOX_REG_SET_OFFSET; >> + ctx->mc[i].chan = &ctx->chans[i]; >> + ctx->chans[i].con_priv = &ctx->mc[i]; >> + } >> + >> + /* Setup mailbox controller */ >> + ctx->mb_ctrl.dev = &pdev->dev; >> + ctx->mb_ctrl.chans = ctx->chans; >> + ctx->mb_ctrl.txdone_irq = true; >> + ctx->mb_ctrl.ops = &slimpro_mbox_ops; >> + ctx->mb_ctrl.num_chans = i; >> + >> + rc = mbox_controller_register(&ctx->mb_ctrl); >> + if (rc) { >> + dev_err(&pdev->dev, >> + "APM X-Gene SLIMpro MailBox register failed:%d\n", rc); >> + return rc; >> + } >> + >> + dev_info(&pdev->dev, "APM X-Gene SLIMpro MailBox registered\n"); >> + return 0; >> +} >> + >> +static int slimpro_mbox_remove(struct platform_device *pdev) >> +{ >> + struct slimpro_mbox *smb = platform_get_drvdata(pdev); >> + >> + mbox_controller_unregister(&smb->mb_ctrl); >> + return 0; >> +} >> + >> +static const struct of_device_id slimpro_of_match[] = { >> + {.compatible = "apm,xgene-slimpro-mbox" }, >> + { }, >> +}; >> +MODULE_DEVICE_TABLE(of, slimpro_of_match); >> + >> +#ifdef CONFIG_ACPI >> +static const struct acpi_device_id slimpro_acpi_ids[] = { >> + {"APMC0D01", 0}, >> + {} >> +}; >> +MODULE_DEVICE_TABLE(acpi, slimpro_acpi_ids); >> +#endif >> + >> +static struct platform_driver slimpro_mbox_driver = { >> + .probe = slimpro_mbox_probe, >> + .remove = slimpro_mbox_remove, >> + .driver = { >> + .name = "xgene-slimpro-mbox", >> + .of_match_table = of_match_ptr(slimpro_of_match), >> + .acpi_match_table = ACPI_PTR(slimpro_acpi_ids) >> + }, >> +}; >> + >> +static int __init slimpro_mbox_init(void) >> +{ >> + return platform_driver_register(&slimpro_mbox_driver); >> +} >> + >> +static void __exit slimpro_mbox_exit(void) >> +{ >> + platform_driver_unregister(&slimpro_mbox_driver); >> +} >> + >> +subsys_initcall(slimpro_mbox_init); >> +module_exit(slimpro_mbox_exit); >> + >> +MODULE_DESCRIPTION("APM X-Gene SLIMpro Mailbox Driver"); >> +MODULE_LICENSE("GPL"); >> -- >> 1.9.1 >> ^ permalink raw reply [flat|nested] 95+ messages in thread
* Re: [PATCH v5 1/3] mailbox: Add support for APM X-Gene platform mailbox driver @ 2016-02-10 3:46 ` Duc Dang 0 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2016-02-10 3:46 UTC (permalink / raw) To: Mathieu Poirier Cc: Jassi Brar, Rob Herring, Paul Bolle, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, patches, Feng Kan On Tue, Feb 9, 2016 at 8:40 AM, Mathieu Poirier <mathieu.poirier@linaro.org> wrote: > On 8 February 2016 at 15:04, Duc Dang <dhdang@apm.com> wrote: >> X-Gene mailbox controller provides 8 mailbox channels, with >> each channel has a dedicated interrupt line. >> >> Signed-off-by: Feng Kan <fkan@apm.com> >> Signed-off-by: Duc Dang <dhdang@apm.com> >> --- >> Changes since v4: >> - Rebase over v4.5-rc1 >> - Fix section mistmatch warning by removing >> __init in slimpro_mbox_probe declaration >> - Correctly print channel number when >> there is no IRQ for that channel >> >> Changes since v3: >> - Rebase over v4.4 >> - Remove 'id' in slimpro_mbox_chan structure >> - Remove small functions that are only called once >> and fold them into the other callers >> - Remove void* pointer type cast >> - Relax the number of mailbox IRQs condition >> - Use subsys_initcall to guarantee mailbox driver >> will be registered before any other dependent driver >> is loaded. >> >> drivers/mailbox/Kconfig | 9 ++ >> drivers/mailbox/Makefile | 2 + >> drivers/mailbox/mailbox-xgene-slimpro.c | 264 ++++++++++++++++++++++++++++++++ >> 3 files changed, 275 insertions(+) >> create mode 100644 drivers/mailbox/mailbox-xgene-slimpro.c >> >> diff --git a/drivers/mailbox/Kconfig b/drivers/mailbox/Kconfig >> index 546d05f..678e434 100644 >> --- a/drivers/mailbox/Kconfig >> +++ b/drivers/mailbox/Kconfig >> @@ -85,4 +85,13 @@ config MAILBOX_TEST >> Test client to help with testing new Controller driver >> implementations. >> >> +config XGENE_SLIMPRO_MBOX >> + tristate "APM SoC X-Gene SLIMpro Mailbox Controller" >> + depends on ARCH_XGENE >> + help >> + An implementation of the APM X-Gene Interprocessor Communication >> + Mailbox (IPCM) between the ARM 64-bit cores and SLIMpro controller. >> + It is used to send short messages between ARM64-bit cores and >> + the SLIMpro Management Engine, primarily for PM. Say Y here if you >> + want to use the APM X-Gene SLIMpro IPCM support. >> endif >> diff --git a/drivers/mailbox/Makefile b/drivers/mailbox/Makefile >> index 92435ef..b602ef8 100644 >> --- a/drivers/mailbox/Makefile >> +++ b/drivers/mailbox/Makefile >> @@ -17,3 +17,5 @@ obj-$(CONFIG_ALTERA_MBOX) += mailbox-altera.o >> obj-$(CONFIG_BCM2835_MBOX) += bcm2835-mailbox.o >> >> obj-$(CONFIG_STI_MBOX) += mailbox-sti.o >> + >> +obj-$(CONFIG_XGENE_SLIMPRO_MBOX) += mailbox-xgene-slimpro.o >> diff --git a/drivers/mailbox/mailbox-xgene-slimpro.c b/drivers/mailbox/mailbox-xgene-slimpro.c >> new file mode 100644 >> index 0000000..0ea1eb8 >> --- /dev/null >> +++ b/drivers/mailbox/mailbox-xgene-slimpro.c >> @@ -0,0 +1,264 @@ >> +/* >> + * APM X-Gene SLIMpro MailBox Driver >> + * >> + * Copyright (c) 2015, Applied Micro Circuits Corporation >> + * Author: Feng Kan fkan@apm.com >> + * >> + * This program is free software; you can redistribute it and/or >> + * modify it under the terms of the GNU General Public License as >> + * published by the Free Software Foundation; either version 2 of >> + * the License, or (at your option) any later version. >> + * >> + * This program is distributed in the hope that it will be useful, >> + * but WITHOUT ANY WARRANTY; without even the implied warranty of >> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the >> + * GNU General Public License for more details. >> + * >> + * You should have received a copy of the GNU General Public License >> + * along with this program; if not, see <http://www.gnu.org/licenses/>. >> + * >> + */ >> +#include <linux/acpi.h> >> +#include <linux/delay.h> >> +#include <linux/interrupt.h> >> +#include <linux/io.h> >> +#include <linux/mailbox_controller.h> >> +#include <linux/module.h> >> +#include <linux/of.h> >> +#include <linux/platform_device.h> >> +#include <linux/spinlock.h> >> + >> +#define MBOX_CON_NAME "slimpro-mbox" >> +#define MBOX_REG_SET_OFFSET 0x1000 >> +#define MBOX_CNT 8 >> +#define MBOX_STATUS_AVAIL_MASK BIT(16) >> +#define MBOX_STATUS_ACK_MASK BIT(0) >> + >> +/* Configuration and Status Registers */ >> +#define REG_DB_IN 0x00 >> +#define REG_DB_DIN0 0x04 >> +#define REG_DB_DIN1 0x08 >> +#define REG_DB_OUT 0x10 >> +#define REG_DB_DOUT0 0x14 >> +#define REG_DB_DOUT1 0x18 >> +#define REG_DB_STAT 0x20 >> +#define REG_DB_STATMASK 0x24 >> + >> +struct slimpro_mbox_chan { >> + struct device *dev; >> + struct mbox_chan *chan; >> + void __iomem *reg; >> + int irq; >> + u32 rx_msg[3]; >> +}; >> + >> +struct slimpro_mbox { >> + struct mbox_controller mb_ctrl; >> + struct slimpro_mbox_chan mc[MBOX_CNT]; >> + struct mbox_chan chans[MBOX_CNT]; >> +}; > > The above two structure declaration could use kernel style documentation. Can you please clarify or give an example? I looked into several files in drivers/mailbox/ and drivers/irqchip but could not find what I need to tweak. > >> + >> +static void mb_chan_send_msg(struct slimpro_mbox_chan *mb_chan, u32 *msg) >> +{ >> + writel(msg[1], mb_chan->reg + REG_DB_DOUT0); >> + writel(msg[2], mb_chan->reg + REG_DB_DOUT1); >> + writel(msg[0], mb_chan->reg + REG_DB_OUT); >> +} >> + >> +static void mb_chan_recv_msg(struct slimpro_mbox_chan *mb_chan) >> +{ >> + mb_chan->rx_msg[1] = readl(mb_chan->reg + REG_DB_DIN0); >> + mb_chan->rx_msg[2] = readl(mb_chan->reg + REG_DB_DIN1); >> + mb_chan->rx_msg[0] = readl(mb_chan->reg + REG_DB_IN); >> +} > > Is there a requirement that operations in the above two functions be > ordered? If not significant gains could be achieved by using > writel/readl_relaxed(). Same comment for the rest of this driver. The 'writes' need to be in order as writing to REG_DB_OUT will trigger interrupt, so I want the other 2 'writes' complete before it. After the receiver get the message, it will clear door bell available interrupt request, this will also trigger a door bell acknowledge interrupt. So the 'read' to get the message and the 'write' to clear the door bell available interrupt must be in order as well. Regards, Duc Dang. > > Thanks, > Mathieu > >> + >> +static int mb_chan_status_ack(struct slimpro_mbox_chan *mb_chan) >> +{ >> + u32 val = readl(mb_chan->reg + REG_DB_STAT); >> + >> + if (val & MBOX_STATUS_ACK_MASK) { >> + writel(MBOX_STATUS_ACK_MASK, mb_chan->reg + REG_DB_STAT); >> + return 1; >> + } >> + return 0; >> +} >> + >> +static int mb_chan_status_avail(struct slimpro_mbox_chan *mb_chan) >> +{ >> + u32 val = readl(mb_chan->reg + REG_DB_STAT); >> + >> + if (val & MBOX_STATUS_AVAIL_MASK) { >> + mb_chan_recv_msg(mb_chan); >> + writel(MBOX_STATUS_AVAIL_MASK, mb_chan->reg + REG_DB_STAT); >> + return 1; >> + } >> + return 0; >> +} >> + >> +static irqreturn_t slimpro_mbox_irq(int irq, void *id) >> +{ >> + struct slimpro_mbox_chan *mb_chan = id; >> + >> + if (mb_chan_status_ack(mb_chan)) >> + mbox_chan_txdone(mb_chan->chan, 0); >> + >> + if (mb_chan_status_avail(mb_chan)) >> + mbox_chan_received_data(mb_chan->chan, mb_chan->rx_msg); >> + >> + return IRQ_HANDLED; >> +} >> + >> +static int slimpro_mbox_send_data(struct mbox_chan *chan, void *msg) >> +{ >> + struct slimpro_mbox_chan *mb_chan = chan->con_priv; >> + >> + mb_chan_send_msg(mb_chan, msg); >> + return 0; >> +} >> + >> +static int slimpro_mbox_startup(struct mbox_chan *chan) >> +{ >> + struct slimpro_mbox_chan *mb_chan = chan->con_priv; >> + int rc; >> + u32 val; >> + >> + rc = devm_request_irq(mb_chan->dev, mb_chan->irq, slimpro_mbox_irq, 0, >> + MBOX_CON_NAME, mb_chan); >> + if (unlikely(rc)) { >> + dev_err(mb_chan->dev, "failed to register mailbox interrupt %d\n", >> + mb_chan->irq); >> + return rc; >> + } >> + >> + /* Enable HW interrupt */ >> + writel(MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK, >> + mb_chan->reg + REG_DB_STAT); >> + /* Unmask doorbell status interrupt */ >> + val = readl(mb_chan->reg + REG_DB_STATMASK); >> + val &= ~(MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK); >> + writel(val, mb_chan->reg + REG_DB_STATMASK); >> + >> + return 0; >> +} >> + >> +static void slimpro_mbox_shutdown(struct mbox_chan *chan) >> +{ >> + struct slimpro_mbox_chan *mb_chan = chan->con_priv; >> + u32 val; >> + >> + /* Mask doorbell status interrupt */ >> + val = readl(mb_chan->reg + REG_DB_STATMASK); >> + val |= (MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK); >> + writel(val, mb_chan->reg + REG_DB_STATMASK); >> + >> + devm_free_irq(mb_chan->dev, mb_chan->irq, mb_chan); >> +} >> + >> +static struct mbox_chan_ops slimpro_mbox_ops = { >> + .send_data = slimpro_mbox_send_data, >> + .startup = slimpro_mbox_startup, >> + .shutdown = slimpro_mbox_shutdown, >> +}; >> + >> +static int slimpro_mbox_probe(struct platform_device *pdev) >> +{ >> + struct slimpro_mbox *ctx; >> + struct resource *regs; >> + void __iomem *mb_base; >> + int rc; >> + int i; >> + >> + ctx = devm_kzalloc(&pdev->dev, sizeof(struct slimpro_mbox), GFP_KERNEL); >> + if (IS_ERR(ctx)) >> + return PTR_ERR(ctx); >> + >> + platform_set_drvdata(pdev, ctx); >> + >> + regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); >> + mb_base = devm_ioremap(&pdev->dev, regs->start, resource_size(regs)); >> + if (IS_ERR(mb_base)) >> + return PTR_ERR(mb_base); >> + >> + /* Setup mailbox links */ >> + for (i = 0; i < MBOX_CNT; i++) { >> + ctx->mc[i].irq = platform_get_irq(pdev, i); >> + if (ctx->mc[i].irq < 0) { >> + if (i == 0) { >> + dev_err(&pdev->dev, "no available IRQ\n"); >> + return -EINVAL; >> + } >> + dev_info(&pdev->dev, "no IRQ for channel %d\n", i); >> + break; >> + } >> + >> + ctx->mc[i].dev = &pdev->dev; >> + ctx->mc[i].reg = mb_base + i * MBOX_REG_SET_OFFSET; >> + ctx->mc[i].chan = &ctx->chans[i]; >> + ctx->chans[i].con_priv = &ctx->mc[i]; >> + } >> + >> + /* Setup mailbox controller */ >> + ctx->mb_ctrl.dev = &pdev->dev; >> + ctx->mb_ctrl.chans = ctx->chans; >> + ctx->mb_ctrl.txdone_irq = true; >> + ctx->mb_ctrl.ops = &slimpro_mbox_ops; >> + ctx->mb_ctrl.num_chans = i; >> + >> + rc = mbox_controller_register(&ctx->mb_ctrl); >> + if (rc) { >> + dev_err(&pdev->dev, >> + "APM X-Gene SLIMpro MailBox register failed:%d\n", rc); >> + return rc; >> + } >> + >> + dev_info(&pdev->dev, "APM X-Gene SLIMpro MailBox registered\n"); >> + return 0; >> +} >> + >> +static int slimpro_mbox_remove(struct platform_device *pdev) >> +{ >> + struct slimpro_mbox *smb = platform_get_drvdata(pdev); >> + >> + mbox_controller_unregister(&smb->mb_ctrl); >> + return 0; >> +} >> + >> +static const struct of_device_id slimpro_of_match[] = { >> + {.compatible = "apm,xgene-slimpro-mbox" }, >> + { }, >> +}; >> +MODULE_DEVICE_TABLE(of, slimpro_of_match); >> + >> +#ifdef CONFIG_ACPI >> +static const struct acpi_device_id slimpro_acpi_ids[] = { >> + {"APMC0D01", 0}, >> + {} >> +}; >> +MODULE_DEVICE_TABLE(acpi, slimpro_acpi_ids); >> +#endif >> + >> +static struct platform_driver slimpro_mbox_driver = { >> + .probe = slimpro_mbox_probe, >> + .remove = slimpro_mbox_remove, >> + .driver = { >> + .name = "xgene-slimpro-mbox", >> + .of_match_table = of_match_ptr(slimpro_of_match), >> + .acpi_match_table = ACPI_PTR(slimpro_acpi_ids) >> + }, >> +}; >> + >> +static int __init slimpro_mbox_init(void) >> +{ >> + return platform_driver_register(&slimpro_mbox_driver); >> +} >> + >> +static void __exit slimpro_mbox_exit(void) >> +{ >> + platform_driver_unregister(&slimpro_mbox_driver); >> +} >> + >> +subsys_initcall(slimpro_mbox_init); >> +module_exit(slimpro_mbox_exit); >> + >> +MODULE_DESCRIPTION("APM X-Gene SLIMpro Mailbox Driver"); >> +MODULE_LICENSE("GPL"); >> -- >> 1.9.1 >> ^ permalink raw reply [flat|nested] 95+ messages in thread
* [PATCH v5 1/3] mailbox: Add support for APM X-Gene platform mailbox driver @ 2016-02-10 14:41 ` Mathieu Poirier 0 siblings, 0 replies; 95+ messages in thread From: Mathieu Poirier @ 2016-02-10 14:41 UTC (permalink / raw) To: linux-arm-kernel On 9 February 2016 at 20:46, Duc Dang <dhdang@apm.com> wrote: > On Tue, Feb 9, 2016 at 8:40 AM, Mathieu Poirier > <mathieu.poirier@linaro.org> wrote: >> On 8 February 2016 at 15:04, Duc Dang <dhdang@apm.com> wrote: >>> X-Gene mailbox controller provides 8 mailbox channels, with >>> each channel has a dedicated interrupt line. >>> >>> Signed-off-by: Feng Kan <fkan@apm.com> >>> Signed-off-by: Duc Dang <dhdang@apm.com> >>> --- >>> Changes since v4: >>> - Rebase over v4.5-rc1 >>> - Fix section mistmatch warning by removing >>> __init in slimpro_mbox_probe declaration >>> - Correctly print channel number when >>> there is no IRQ for that channel >>> >>> Changes since v3: >>> - Rebase over v4.4 >>> - Remove 'id' in slimpro_mbox_chan structure >>> - Remove small functions that are only called once >>> and fold them into the other callers >>> - Remove void* pointer type cast >>> - Relax the number of mailbox IRQs condition >>> - Use subsys_initcall to guarantee mailbox driver >>> will be registered before any other dependent driver >>> is loaded. >>> >>> drivers/mailbox/Kconfig | 9 ++ >>> drivers/mailbox/Makefile | 2 + >>> drivers/mailbox/mailbox-xgene-slimpro.c | 264 ++++++++++++++++++++++++++++++++ >>> 3 files changed, 275 insertions(+) >>> create mode 100644 drivers/mailbox/mailbox-xgene-slimpro.c >>> >>> diff --git a/drivers/mailbox/Kconfig b/drivers/mailbox/Kconfig >>> index 546d05f..678e434 100644 >>> --- a/drivers/mailbox/Kconfig >>> +++ b/drivers/mailbox/Kconfig >>> @@ -85,4 +85,13 @@ config MAILBOX_TEST >>> Test client to help with testing new Controller driver >>> implementations. >>> >>> +config XGENE_SLIMPRO_MBOX >>> + tristate "APM SoC X-Gene SLIMpro Mailbox Controller" >>> + depends on ARCH_XGENE >>> + help >>> + An implementation of the APM X-Gene Interprocessor Communication >>> + Mailbox (IPCM) between the ARM 64-bit cores and SLIMpro controller. >>> + It is used to send short messages between ARM64-bit cores and >>> + the SLIMpro Management Engine, primarily for PM. Say Y here if you >>> + want to use the APM X-Gene SLIMpro IPCM support. >>> endif >>> diff --git a/drivers/mailbox/Makefile b/drivers/mailbox/Makefile >>> index 92435ef..b602ef8 100644 >>> --- a/drivers/mailbox/Makefile >>> +++ b/drivers/mailbox/Makefile >>> @@ -17,3 +17,5 @@ obj-$(CONFIG_ALTERA_MBOX) += mailbox-altera.o >>> obj-$(CONFIG_BCM2835_MBOX) += bcm2835-mailbox.o >>> >>> obj-$(CONFIG_STI_MBOX) += mailbox-sti.o >>> + >>> +obj-$(CONFIG_XGENE_SLIMPRO_MBOX) += mailbox-xgene-slimpro.o >>> diff --git a/drivers/mailbox/mailbox-xgene-slimpro.c b/drivers/mailbox/mailbox-xgene-slimpro.c >>> new file mode 100644 >>> index 0000000..0ea1eb8 >>> --- /dev/null >>> +++ b/drivers/mailbox/mailbox-xgene-slimpro.c >>> @@ -0,0 +1,264 @@ >>> +/* >>> + * APM X-Gene SLIMpro MailBox Driver >>> + * >>> + * Copyright (c) 2015, Applied Micro Circuits Corporation >>> + * Author: Feng Kan fkan at apm.com >>> + * >>> + * This program is free software; you can redistribute it and/or >>> + * modify it under the terms of the GNU General Public License as >>> + * published by the Free Software Foundation; either version 2 of >>> + * the License, or (at your option) any later version. >>> + * >>> + * This program is distributed in the hope that it will be useful, >>> + * but WITHOUT ANY WARRANTY; without even the implied warranty of >>> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the >>> + * GNU General Public License for more details. >>> + * >>> + * You should have received a copy of the GNU General Public License >>> + * along with this program; if not, see <http://www.gnu.org/licenses/>. >>> + * >>> + */ >>> +#include <linux/acpi.h> >>> +#include <linux/delay.h> >>> +#include <linux/interrupt.h> >>> +#include <linux/io.h> >>> +#include <linux/mailbox_controller.h> >>> +#include <linux/module.h> >>> +#include <linux/of.h> >>> +#include <linux/platform_device.h> >>> +#include <linux/spinlock.h> >>> + >>> +#define MBOX_CON_NAME "slimpro-mbox" >>> +#define MBOX_REG_SET_OFFSET 0x1000 >>> +#define MBOX_CNT 8 >>> +#define MBOX_STATUS_AVAIL_MASK BIT(16) >>> +#define MBOX_STATUS_ACK_MASK BIT(0) >>> + >>> +/* Configuration and Status Registers */ >>> +#define REG_DB_IN 0x00 >>> +#define REG_DB_DIN0 0x04 >>> +#define REG_DB_DIN1 0x08 >>> +#define REG_DB_OUT 0x10 >>> +#define REG_DB_DOUT0 0x14 >>> +#define REG_DB_DOUT1 0x18 >>> +#define REG_DB_STAT 0x20 >>> +#define REG_DB_STATMASK 0x24 >>> + >>> +struct slimpro_mbox_chan { >>> + struct device *dev; >>> + struct mbox_chan *chan; >>> + void __iomem *reg; >>> + int irq; >>> + u32 rx_msg[3]; >>> +}; >>> + >>> +struct slimpro_mbox { >>> + struct mbox_controller mb_ctrl; >>> + struct slimpro_mbox_chan mc[MBOX_CNT]; >>> + struct mbox_chan chans[MBOX_CNT]; >>> +}; >> >> The above two structure declaration could use kernel style documentation. > > Can you please clarify or give an example? I looked into several files > in drivers/mailbox/ and drivers/irqchip but could not find what I need > to tweak. http://lxr.free-electrons.com/source/drivers/mailbox/mailbox-sti.c#L42 > >> >>> + >>> +static void mb_chan_send_msg(struct slimpro_mbox_chan *mb_chan, u32 *msg) >>> +{ >>> + writel(msg[1], mb_chan->reg + REG_DB_DOUT0); >>> + writel(msg[2], mb_chan->reg + REG_DB_DOUT1); >>> + writel(msg[0], mb_chan->reg + REG_DB_OUT); >>> +} >>> + >>> +static void mb_chan_recv_msg(struct slimpro_mbox_chan *mb_chan) >>> +{ >>> + mb_chan->rx_msg[1] = readl(mb_chan->reg + REG_DB_DIN0); >>> + mb_chan->rx_msg[2] = readl(mb_chan->reg + REG_DB_DIN1); >>> + mb_chan->rx_msg[0] = readl(mb_chan->reg + REG_DB_IN); >>> +} >> >> Is there a requirement that operations in the above two functions be >> ordered? If not significant gains could be achieved by using >> writel/readl_relaxed(). Same comment for the rest of this driver. > > The 'writes' need to be in order as writing to REG_DB_OUT will trigger > interrupt, so I want the other 2 'writes' complete before it. > > After the receiver get the message, it will clear door bell available > interrupt request, this will also trigger a door bell acknowledge > interrupt. So the 'read' to get the message and the 'write' to clear > the door bell available interrupt must be in order as well. > > Regards, > Duc Dang. >> >> Thanks, >> Mathieu >> >>> + >>> +static int mb_chan_status_ack(struct slimpro_mbox_chan *mb_chan) >>> +{ >>> + u32 val = readl(mb_chan->reg + REG_DB_STAT); >>> + >>> + if (val & MBOX_STATUS_ACK_MASK) { >>> + writel(MBOX_STATUS_ACK_MASK, mb_chan->reg + REG_DB_STAT); >>> + return 1; >>> + } >>> + return 0; >>> +} >>> + >>> +static int mb_chan_status_avail(struct slimpro_mbox_chan *mb_chan) >>> +{ >>> + u32 val = readl(mb_chan->reg + REG_DB_STAT); >>> + >>> + if (val & MBOX_STATUS_AVAIL_MASK) { >>> + mb_chan_recv_msg(mb_chan); >>> + writel(MBOX_STATUS_AVAIL_MASK, mb_chan->reg + REG_DB_STAT); >>> + return 1; >>> + } >>> + return 0; >>> +} >>> + >>> +static irqreturn_t slimpro_mbox_irq(int irq, void *id) >>> +{ >>> + struct slimpro_mbox_chan *mb_chan = id; >>> + >>> + if (mb_chan_status_ack(mb_chan)) >>> + mbox_chan_txdone(mb_chan->chan, 0); >>> + >>> + if (mb_chan_status_avail(mb_chan)) >>> + mbox_chan_received_data(mb_chan->chan, mb_chan->rx_msg); >>> + >>> + return IRQ_HANDLED; >>> +} >>> + >>> +static int slimpro_mbox_send_data(struct mbox_chan *chan, void *msg) >>> +{ >>> + struct slimpro_mbox_chan *mb_chan = chan->con_priv; >>> + >>> + mb_chan_send_msg(mb_chan, msg); >>> + return 0; >>> +} >>> + >>> +static int slimpro_mbox_startup(struct mbox_chan *chan) >>> +{ >>> + struct slimpro_mbox_chan *mb_chan = chan->con_priv; >>> + int rc; >>> + u32 val; >>> + >>> + rc = devm_request_irq(mb_chan->dev, mb_chan->irq, slimpro_mbox_irq, 0, >>> + MBOX_CON_NAME, mb_chan); >>> + if (unlikely(rc)) { >>> + dev_err(mb_chan->dev, "failed to register mailbox interrupt %d\n", >>> + mb_chan->irq); >>> + return rc; >>> + } >>> + >>> + /* Enable HW interrupt */ >>> + writel(MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK, >>> + mb_chan->reg + REG_DB_STAT); >>> + /* Unmask doorbell status interrupt */ >>> + val = readl(mb_chan->reg + REG_DB_STATMASK); >>> + val &= ~(MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK); >>> + writel(val, mb_chan->reg + REG_DB_STATMASK); >>> + >>> + return 0; >>> +} >>> + >>> +static void slimpro_mbox_shutdown(struct mbox_chan *chan) >>> +{ >>> + struct slimpro_mbox_chan *mb_chan = chan->con_priv; >>> + u32 val; >>> + >>> + /* Mask doorbell status interrupt */ >>> + val = readl(mb_chan->reg + REG_DB_STATMASK); >>> + val |= (MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK); >>> + writel(val, mb_chan->reg + REG_DB_STATMASK); >>> + >>> + devm_free_irq(mb_chan->dev, mb_chan->irq, mb_chan); >>> +} >>> + >>> +static struct mbox_chan_ops slimpro_mbox_ops = { >>> + .send_data = slimpro_mbox_send_data, >>> + .startup = slimpro_mbox_startup, >>> + .shutdown = slimpro_mbox_shutdown, >>> +}; >>> + >>> +static int slimpro_mbox_probe(struct platform_device *pdev) >>> +{ >>> + struct slimpro_mbox *ctx; >>> + struct resource *regs; >>> + void __iomem *mb_base; >>> + int rc; >>> + int i; >>> + >>> + ctx = devm_kzalloc(&pdev->dev, sizeof(struct slimpro_mbox), GFP_KERNEL); >>> + if (IS_ERR(ctx)) >>> + return PTR_ERR(ctx); >>> + >>> + platform_set_drvdata(pdev, ctx); >>> + >>> + regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); >>> + mb_base = devm_ioremap(&pdev->dev, regs->start, resource_size(regs)); >>> + if (IS_ERR(mb_base)) >>> + return PTR_ERR(mb_base); >>> + >>> + /* Setup mailbox links */ >>> + for (i = 0; i < MBOX_CNT; i++) { >>> + ctx->mc[i].irq = platform_get_irq(pdev, i); >>> + if (ctx->mc[i].irq < 0) { >>> + if (i == 0) { >>> + dev_err(&pdev->dev, "no available IRQ\n"); >>> + return -EINVAL; >>> + } >>> + dev_info(&pdev->dev, "no IRQ for channel %d\n", i); >>> + break; >>> + } >>> + >>> + ctx->mc[i].dev = &pdev->dev; >>> + ctx->mc[i].reg = mb_base + i * MBOX_REG_SET_OFFSET; >>> + ctx->mc[i].chan = &ctx->chans[i]; >>> + ctx->chans[i].con_priv = &ctx->mc[i]; >>> + } >>> + >>> + /* Setup mailbox controller */ >>> + ctx->mb_ctrl.dev = &pdev->dev; >>> + ctx->mb_ctrl.chans = ctx->chans; >>> + ctx->mb_ctrl.txdone_irq = true; >>> + ctx->mb_ctrl.ops = &slimpro_mbox_ops; >>> + ctx->mb_ctrl.num_chans = i; >>> + >>> + rc = mbox_controller_register(&ctx->mb_ctrl); >>> + if (rc) { >>> + dev_err(&pdev->dev, >>> + "APM X-Gene SLIMpro MailBox register failed:%d\n", rc); >>> + return rc; >>> + } >>> + >>> + dev_info(&pdev->dev, "APM X-Gene SLIMpro MailBox registered\n"); >>> + return 0; >>> +} >>> + >>> +static int slimpro_mbox_remove(struct platform_device *pdev) >>> +{ >>> + struct slimpro_mbox *smb = platform_get_drvdata(pdev); >>> + >>> + mbox_controller_unregister(&smb->mb_ctrl); >>> + return 0; >>> +} >>> + >>> +static const struct of_device_id slimpro_of_match[] = { >>> + {.compatible = "apm,xgene-slimpro-mbox" }, >>> + { }, >>> +}; >>> +MODULE_DEVICE_TABLE(of, slimpro_of_match); >>> + >>> +#ifdef CONFIG_ACPI >>> +static const struct acpi_device_id slimpro_acpi_ids[] = { >>> + {"APMC0D01", 0}, >>> + {} >>> +}; >>> +MODULE_DEVICE_TABLE(acpi, slimpro_acpi_ids); >>> +#endif >>> + >>> +static struct platform_driver slimpro_mbox_driver = { >>> + .probe = slimpro_mbox_probe, >>> + .remove = slimpro_mbox_remove, >>> + .driver = { >>> + .name = "xgene-slimpro-mbox", >>> + .of_match_table = of_match_ptr(slimpro_of_match), >>> + .acpi_match_table = ACPI_PTR(slimpro_acpi_ids) >>> + }, >>> +}; >>> + >>> +static int __init slimpro_mbox_init(void) >>> +{ >>> + return platform_driver_register(&slimpro_mbox_driver); >>> +} >>> + >>> +static void __exit slimpro_mbox_exit(void) >>> +{ >>> + platform_driver_unregister(&slimpro_mbox_driver); >>> +} >>> + >>> +subsys_initcall(slimpro_mbox_init); >>> +module_exit(slimpro_mbox_exit); >>> + >>> +MODULE_DESCRIPTION("APM X-Gene SLIMpro Mailbox Driver"); >>> +MODULE_LICENSE("GPL"); >>> -- >>> 1.9.1 >>> ^ permalink raw reply [flat|nested] 95+ messages in thread
* Re: [PATCH v5 1/3] mailbox: Add support for APM X-Gene platform mailbox driver @ 2016-02-10 14:41 ` Mathieu Poirier 0 siblings, 0 replies; 95+ messages in thread From: Mathieu Poirier @ 2016-02-10 14:41 UTC (permalink / raw) To: Duc Dang Cc: Jassi Brar, Rob Herring, Paul Bolle, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, patches, Feng Kan On 9 February 2016 at 20:46, Duc Dang <dhdang@apm.com> wrote: > On Tue, Feb 9, 2016 at 8:40 AM, Mathieu Poirier > <mathieu.poirier@linaro.org> wrote: >> On 8 February 2016 at 15:04, Duc Dang <dhdang@apm.com> wrote: >>> X-Gene mailbox controller provides 8 mailbox channels, with >>> each channel has a dedicated interrupt line. >>> >>> Signed-off-by: Feng Kan <fkan@apm.com> >>> Signed-off-by: Duc Dang <dhdang@apm.com> >>> --- >>> Changes since v4: >>> - Rebase over v4.5-rc1 >>> - Fix section mistmatch warning by removing >>> __init in slimpro_mbox_probe declaration >>> - Correctly print channel number when >>> there is no IRQ for that channel >>> >>> Changes since v3: >>> - Rebase over v4.4 >>> - Remove 'id' in slimpro_mbox_chan structure >>> - Remove small functions that are only called once >>> and fold them into the other callers >>> - Remove void* pointer type cast >>> - Relax the number of mailbox IRQs condition >>> - Use subsys_initcall to guarantee mailbox driver >>> will be registered before any other dependent driver >>> is loaded. >>> >>> drivers/mailbox/Kconfig | 9 ++ >>> drivers/mailbox/Makefile | 2 + >>> drivers/mailbox/mailbox-xgene-slimpro.c | 264 ++++++++++++++++++++++++++++++++ >>> 3 files changed, 275 insertions(+) >>> create mode 100644 drivers/mailbox/mailbox-xgene-slimpro.c >>> >>> diff --git a/drivers/mailbox/Kconfig b/drivers/mailbox/Kconfig >>> index 546d05f..678e434 100644 >>> --- a/drivers/mailbox/Kconfig >>> +++ b/drivers/mailbox/Kconfig >>> @@ -85,4 +85,13 @@ config MAILBOX_TEST >>> Test client to help with testing new Controller driver >>> implementations. >>> >>> +config XGENE_SLIMPRO_MBOX >>> + tristate "APM SoC X-Gene SLIMpro Mailbox Controller" >>> + depends on ARCH_XGENE >>> + help >>> + An implementation of the APM X-Gene Interprocessor Communication >>> + Mailbox (IPCM) between the ARM 64-bit cores and SLIMpro controller. >>> + It is used to send short messages between ARM64-bit cores and >>> + the SLIMpro Management Engine, primarily for PM. Say Y here if you >>> + want to use the APM X-Gene SLIMpro IPCM support. >>> endif >>> diff --git a/drivers/mailbox/Makefile b/drivers/mailbox/Makefile >>> index 92435ef..b602ef8 100644 >>> --- a/drivers/mailbox/Makefile >>> +++ b/drivers/mailbox/Makefile >>> @@ -17,3 +17,5 @@ obj-$(CONFIG_ALTERA_MBOX) += mailbox-altera.o >>> obj-$(CONFIG_BCM2835_MBOX) += bcm2835-mailbox.o >>> >>> obj-$(CONFIG_STI_MBOX) += mailbox-sti.o >>> + >>> +obj-$(CONFIG_XGENE_SLIMPRO_MBOX) += mailbox-xgene-slimpro.o >>> diff --git a/drivers/mailbox/mailbox-xgene-slimpro.c b/drivers/mailbox/mailbox-xgene-slimpro.c >>> new file mode 100644 >>> index 0000000..0ea1eb8 >>> --- /dev/null >>> +++ b/drivers/mailbox/mailbox-xgene-slimpro.c >>> @@ -0,0 +1,264 @@ >>> +/* >>> + * APM X-Gene SLIMpro MailBox Driver >>> + * >>> + * Copyright (c) 2015, Applied Micro Circuits Corporation >>> + * Author: Feng Kan fkan@apm.com >>> + * >>> + * This program is free software; you can redistribute it and/or >>> + * modify it under the terms of the GNU General Public License as >>> + * published by the Free Software Foundation; either version 2 of >>> + * the License, or (at your option) any later version. >>> + * >>> + * This program is distributed in the hope that it will be useful, >>> + * but WITHOUT ANY WARRANTY; without even the implied warranty of >>> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the >>> + * GNU General Public License for more details. >>> + * >>> + * You should have received a copy of the GNU General Public License >>> + * along with this program; if not, see <http://www.gnu.org/licenses/>. >>> + * >>> + */ >>> +#include <linux/acpi.h> >>> +#include <linux/delay.h> >>> +#include <linux/interrupt.h> >>> +#include <linux/io.h> >>> +#include <linux/mailbox_controller.h> >>> +#include <linux/module.h> >>> +#include <linux/of.h> >>> +#include <linux/platform_device.h> >>> +#include <linux/spinlock.h> >>> + >>> +#define MBOX_CON_NAME "slimpro-mbox" >>> +#define MBOX_REG_SET_OFFSET 0x1000 >>> +#define MBOX_CNT 8 >>> +#define MBOX_STATUS_AVAIL_MASK BIT(16) >>> +#define MBOX_STATUS_ACK_MASK BIT(0) >>> + >>> +/* Configuration and Status Registers */ >>> +#define REG_DB_IN 0x00 >>> +#define REG_DB_DIN0 0x04 >>> +#define REG_DB_DIN1 0x08 >>> +#define REG_DB_OUT 0x10 >>> +#define REG_DB_DOUT0 0x14 >>> +#define REG_DB_DOUT1 0x18 >>> +#define REG_DB_STAT 0x20 >>> +#define REG_DB_STATMASK 0x24 >>> + >>> +struct slimpro_mbox_chan { >>> + struct device *dev; >>> + struct mbox_chan *chan; >>> + void __iomem *reg; >>> + int irq; >>> + u32 rx_msg[3]; >>> +}; >>> + >>> +struct slimpro_mbox { >>> + struct mbox_controller mb_ctrl; >>> + struct slimpro_mbox_chan mc[MBOX_CNT]; >>> + struct mbox_chan chans[MBOX_CNT]; >>> +}; >> >> The above two structure declaration could use kernel style documentation. > > Can you please clarify or give an example? I looked into several files > in drivers/mailbox/ and drivers/irqchip but could not find what I need > to tweak. http://lxr.free-electrons.com/source/drivers/mailbox/mailbox-sti.c#L42 > >> >>> + >>> +static void mb_chan_send_msg(struct slimpro_mbox_chan *mb_chan, u32 *msg) >>> +{ >>> + writel(msg[1], mb_chan->reg + REG_DB_DOUT0); >>> + writel(msg[2], mb_chan->reg + REG_DB_DOUT1); >>> + writel(msg[0], mb_chan->reg + REG_DB_OUT); >>> +} >>> + >>> +static void mb_chan_recv_msg(struct slimpro_mbox_chan *mb_chan) >>> +{ >>> + mb_chan->rx_msg[1] = readl(mb_chan->reg + REG_DB_DIN0); >>> + mb_chan->rx_msg[2] = readl(mb_chan->reg + REG_DB_DIN1); >>> + mb_chan->rx_msg[0] = readl(mb_chan->reg + REG_DB_IN); >>> +} >> >> Is there a requirement that operations in the above two functions be >> ordered? If not significant gains could be achieved by using >> writel/readl_relaxed(). Same comment for the rest of this driver. > > The 'writes' need to be in order as writing to REG_DB_OUT will trigger > interrupt, so I want the other 2 'writes' complete before it. > > After the receiver get the message, it will clear door bell available > interrupt request, this will also trigger a door bell acknowledge > interrupt. So the 'read' to get the message and the 'write' to clear > the door bell available interrupt must be in order as well. > > Regards, > Duc Dang. >> >> Thanks, >> Mathieu >> >>> + >>> +static int mb_chan_status_ack(struct slimpro_mbox_chan *mb_chan) >>> +{ >>> + u32 val = readl(mb_chan->reg + REG_DB_STAT); >>> + >>> + if (val & MBOX_STATUS_ACK_MASK) { >>> + writel(MBOX_STATUS_ACK_MASK, mb_chan->reg + REG_DB_STAT); >>> + return 1; >>> + } >>> + return 0; >>> +} >>> + >>> +static int mb_chan_status_avail(struct slimpro_mbox_chan *mb_chan) >>> +{ >>> + u32 val = readl(mb_chan->reg + REG_DB_STAT); >>> + >>> + if (val & MBOX_STATUS_AVAIL_MASK) { >>> + mb_chan_recv_msg(mb_chan); >>> + writel(MBOX_STATUS_AVAIL_MASK, mb_chan->reg + REG_DB_STAT); >>> + return 1; >>> + } >>> + return 0; >>> +} >>> + >>> +static irqreturn_t slimpro_mbox_irq(int irq, void *id) >>> +{ >>> + struct slimpro_mbox_chan *mb_chan = id; >>> + >>> + if (mb_chan_status_ack(mb_chan)) >>> + mbox_chan_txdone(mb_chan->chan, 0); >>> + >>> + if (mb_chan_status_avail(mb_chan)) >>> + mbox_chan_received_data(mb_chan->chan, mb_chan->rx_msg); >>> + >>> + return IRQ_HANDLED; >>> +} >>> + >>> +static int slimpro_mbox_send_data(struct mbox_chan *chan, void *msg) >>> +{ >>> + struct slimpro_mbox_chan *mb_chan = chan->con_priv; >>> + >>> + mb_chan_send_msg(mb_chan, msg); >>> + return 0; >>> +} >>> + >>> +static int slimpro_mbox_startup(struct mbox_chan *chan) >>> +{ >>> + struct slimpro_mbox_chan *mb_chan = chan->con_priv; >>> + int rc; >>> + u32 val; >>> + >>> + rc = devm_request_irq(mb_chan->dev, mb_chan->irq, slimpro_mbox_irq, 0, >>> + MBOX_CON_NAME, mb_chan); >>> + if (unlikely(rc)) { >>> + dev_err(mb_chan->dev, "failed to register mailbox interrupt %d\n", >>> + mb_chan->irq); >>> + return rc; >>> + } >>> + >>> + /* Enable HW interrupt */ >>> + writel(MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK, >>> + mb_chan->reg + REG_DB_STAT); >>> + /* Unmask doorbell status interrupt */ >>> + val = readl(mb_chan->reg + REG_DB_STATMASK); >>> + val &= ~(MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK); >>> + writel(val, mb_chan->reg + REG_DB_STATMASK); >>> + >>> + return 0; >>> +} >>> + >>> +static void slimpro_mbox_shutdown(struct mbox_chan *chan) >>> +{ >>> + struct slimpro_mbox_chan *mb_chan = chan->con_priv; >>> + u32 val; >>> + >>> + /* Mask doorbell status interrupt */ >>> + val = readl(mb_chan->reg + REG_DB_STATMASK); >>> + val |= (MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK); >>> + writel(val, mb_chan->reg + REG_DB_STATMASK); >>> + >>> + devm_free_irq(mb_chan->dev, mb_chan->irq, mb_chan); >>> +} >>> + >>> +static struct mbox_chan_ops slimpro_mbox_ops = { >>> + .send_data = slimpro_mbox_send_data, >>> + .startup = slimpro_mbox_startup, >>> + .shutdown = slimpro_mbox_shutdown, >>> +}; >>> + >>> +static int slimpro_mbox_probe(struct platform_device *pdev) >>> +{ >>> + struct slimpro_mbox *ctx; >>> + struct resource *regs; >>> + void __iomem *mb_base; >>> + int rc; >>> + int i; >>> + >>> + ctx = devm_kzalloc(&pdev->dev, sizeof(struct slimpro_mbox), GFP_KERNEL); >>> + if (IS_ERR(ctx)) >>> + return PTR_ERR(ctx); >>> + >>> + platform_set_drvdata(pdev, ctx); >>> + >>> + regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); >>> + mb_base = devm_ioremap(&pdev->dev, regs->start, resource_size(regs)); >>> + if (IS_ERR(mb_base)) >>> + return PTR_ERR(mb_base); >>> + >>> + /* Setup mailbox links */ >>> + for (i = 0; i < MBOX_CNT; i++) { >>> + ctx->mc[i].irq = platform_get_irq(pdev, i); >>> + if (ctx->mc[i].irq < 0) { >>> + if (i == 0) { >>> + dev_err(&pdev->dev, "no available IRQ\n"); >>> + return -EINVAL; >>> + } >>> + dev_info(&pdev->dev, "no IRQ for channel %d\n", i); >>> + break; >>> + } >>> + >>> + ctx->mc[i].dev = &pdev->dev; >>> + ctx->mc[i].reg = mb_base + i * MBOX_REG_SET_OFFSET; >>> + ctx->mc[i].chan = &ctx->chans[i]; >>> + ctx->chans[i].con_priv = &ctx->mc[i]; >>> + } >>> + >>> + /* Setup mailbox controller */ >>> + ctx->mb_ctrl.dev = &pdev->dev; >>> + ctx->mb_ctrl.chans = ctx->chans; >>> + ctx->mb_ctrl.txdone_irq = true; >>> + ctx->mb_ctrl.ops = &slimpro_mbox_ops; >>> + ctx->mb_ctrl.num_chans = i; >>> + >>> + rc = mbox_controller_register(&ctx->mb_ctrl); >>> + if (rc) { >>> + dev_err(&pdev->dev, >>> + "APM X-Gene SLIMpro MailBox register failed:%d\n", rc); >>> + return rc; >>> + } >>> + >>> + dev_info(&pdev->dev, "APM X-Gene SLIMpro MailBox registered\n"); >>> + return 0; >>> +} >>> + >>> +static int slimpro_mbox_remove(struct platform_device *pdev) >>> +{ >>> + struct slimpro_mbox *smb = platform_get_drvdata(pdev); >>> + >>> + mbox_controller_unregister(&smb->mb_ctrl); >>> + return 0; >>> +} >>> + >>> +static const struct of_device_id slimpro_of_match[] = { >>> + {.compatible = "apm,xgene-slimpro-mbox" }, >>> + { }, >>> +}; >>> +MODULE_DEVICE_TABLE(of, slimpro_of_match); >>> + >>> +#ifdef CONFIG_ACPI >>> +static const struct acpi_device_id slimpro_acpi_ids[] = { >>> + {"APMC0D01", 0}, >>> + {} >>> +}; >>> +MODULE_DEVICE_TABLE(acpi, slimpro_acpi_ids); >>> +#endif >>> + >>> +static struct platform_driver slimpro_mbox_driver = { >>> + .probe = slimpro_mbox_probe, >>> + .remove = slimpro_mbox_remove, >>> + .driver = { >>> + .name = "xgene-slimpro-mbox", >>> + .of_match_table = of_match_ptr(slimpro_of_match), >>> + .acpi_match_table = ACPI_PTR(slimpro_acpi_ids) >>> + }, >>> +}; >>> + >>> +static int __init slimpro_mbox_init(void) >>> +{ >>> + return platform_driver_register(&slimpro_mbox_driver); >>> +} >>> + >>> +static void __exit slimpro_mbox_exit(void) >>> +{ >>> + platform_driver_unregister(&slimpro_mbox_driver); >>> +} >>> + >>> +subsys_initcall(slimpro_mbox_init); >>> +module_exit(slimpro_mbox_exit); >>> + >>> +MODULE_DESCRIPTION("APM X-Gene SLIMpro Mailbox Driver"); >>> +MODULE_LICENSE("GPL"); >>> -- >>> 1.9.1 >>> ^ permalink raw reply [flat|nested] 95+ messages in thread
* Re: [PATCH v5 1/3] mailbox: Add support for APM X-Gene platform mailbox driver @ 2016-02-10 14:41 ` Mathieu Poirier 0 siblings, 0 replies; 95+ messages in thread From: Mathieu Poirier @ 2016-02-10 14:41 UTC (permalink / raw) To: Duc Dang Cc: Jassi Brar, Rob Herring, Paul Bolle, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, patches, Feng Kan On 9 February 2016 at 20:46, Duc Dang <dhdang-qTEPVZfXA3Y@public.gmane.org> wrote: > On Tue, Feb 9, 2016 at 8:40 AM, Mathieu Poirier > <mathieu.poirier-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org> wrote: >> On 8 February 2016 at 15:04, Duc Dang <dhdang-qTEPVZfXA3Y@public.gmane.org> wrote: >>> X-Gene mailbox controller provides 8 mailbox channels, with >>> each channel has a dedicated interrupt line. >>> >>> Signed-off-by: Feng Kan <fkan-qTEPVZfXA3Y@public.gmane.org> >>> Signed-off-by: Duc Dang <dhdang-qTEPVZfXA3Y@public.gmane.org> >>> --- >>> Changes since v4: >>> - Rebase over v4.5-rc1 >>> - Fix section mistmatch warning by removing >>> __init in slimpro_mbox_probe declaration >>> - Correctly print channel number when >>> there is no IRQ for that channel >>> >>> Changes since v3: >>> - Rebase over v4.4 >>> - Remove 'id' in slimpro_mbox_chan structure >>> - Remove small functions that are only called once >>> and fold them into the other callers >>> - Remove void* pointer type cast >>> - Relax the number of mailbox IRQs condition >>> - Use subsys_initcall to guarantee mailbox driver >>> will be registered before any other dependent driver >>> is loaded. >>> >>> drivers/mailbox/Kconfig | 9 ++ >>> drivers/mailbox/Makefile | 2 + >>> drivers/mailbox/mailbox-xgene-slimpro.c | 264 ++++++++++++++++++++++++++++++++ >>> 3 files changed, 275 insertions(+) >>> create mode 100644 drivers/mailbox/mailbox-xgene-slimpro.c >>> >>> diff --git a/drivers/mailbox/Kconfig b/drivers/mailbox/Kconfig >>> index 546d05f..678e434 100644 >>> --- a/drivers/mailbox/Kconfig >>> +++ b/drivers/mailbox/Kconfig >>> @@ -85,4 +85,13 @@ config MAILBOX_TEST >>> Test client to help with testing new Controller driver >>> implementations. >>> >>> +config XGENE_SLIMPRO_MBOX >>> + tristate "APM SoC X-Gene SLIMpro Mailbox Controller" >>> + depends on ARCH_XGENE >>> + help >>> + An implementation of the APM X-Gene Interprocessor Communication >>> + Mailbox (IPCM) between the ARM 64-bit cores and SLIMpro controller. >>> + It is used to send short messages between ARM64-bit cores and >>> + the SLIMpro Management Engine, primarily for PM. Say Y here if you >>> + want to use the APM X-Gene SLIMpro IPCM support. >>> endif >>> diff --git a/drivers/mailbox/Makefile b/drivers/mailbox/Makefile >>> index 92435ef..b602ef8 100644 >>> --- a/drivers/mailbox/Makefile >>> +++ b/drivers/mailbox/Makefile >>> @@ -17,3 +17,5 @@ obj-$(CONFIG_ALTERA_MBOX) += mailbox-altera.o >>> obj-$(CONFIG_BCM2835_MBOX) += bcm2835-mailbox.o >>> >>> obj-$(CONFIG_STI_MBOX) += mailbox-sti.o >>> + >>> +obj-$(CONFIG_XGENE_SLIMPRO_MBOX) += mailbox-xgene-slimpro.o >>> diff --git a/drivers/mailbox/mailbox-xgene-slimpro.c b/drivers/mailbox/mailbox-xgene-slimpro.c >>> new file mode 100644 >>> index 0000000..0ea1eb8 >>> --- /dev/null >>> +++ b/drivers/mailbox/mailbox-xgene-slimpro.c >>> @@ -0,0 +1,264 @@ >>> +/* >>> + * APM X-Gene SLIMpro MailBox Driver >>> + * >>> + * Copyright (c) 2015, Applied Micro Circuits Corporation >>> + * Author: Feng Kan fkan-qTEPVZfXA3Y@public.gmane.org >>> + * >>> + * This program is free software; you can redistribute it and/or >>> + * modify it under the terms of the GNU General Public License as >>> + * published by the Free Software Foundation; either version 2 of >>> + * the License, or (at your option) any later version. >>> + * >>> + * This program is distributed in the hope that it will be useful, >>> + * but WITHOUT ANY WARRANTY; without even the implied warranty of >>> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the >>> + * GNU General Public License for more details. >>> + * >>> + * You should have received a copy of the GNU General Public License >>> + * along with this program; if not, see <http://www.gnu.org/licenses/>. >>> + * >>> + */ >>> +#include <linux/acpi.h> >>> +#include <linux/delay.h> >>> +#include <linux/interrupt.h> >>> +#include <linux/io.h> >>> +#include <linux/mailbox_controller.h> >>> +#include <linux/module.h> >>> +#include <linux/of.h> >>> +#include <linux/platform_device.h> >>> +#include <linux/spinlock.h> >>> + >>> +#define MBOX_CON_NAME "slimpro-mbox" >>> +#define MBOX_REG_SET_OFFSET 0x1000 >>> +#define MBOX_CNT 8 >>> +#define MBOX_STATUS_AVAIL_MASK BIT(16) >>> +#define MBOX_STATUS_ACK_MASK BIT(0) >>> + >>> +/* Configuration and Status Registers */ >>> +#define REG_DB_IN 0x00 >>> +#define REG_DB_DIN0 0x04 >>> +#define REG_DB_DIN1 0x08 >>> +#define REG_DB_OUT 0x10 >>> +#define REG_DB_DOUT0 0x14 >>> +#define REG_DB_DOUT1 0x18 >>> +#define REG_DB_STAT 0x20 >>> +#define REG_DB_STATMASK 0x24 >>> + >>> +struct slimpro_mbox_chan { >>> + struct device *dev; >>> + struct mbox_chan *chan; >>> + void __iomem *reg; >>> + int irq; >>> + u32 rx_msg[3]; >>> +}; >>> + >>> +struct slimpro_mbox { >>> + struct mbox_controller mb_ctrl; >>> + struct slimpro_mbox_chan mc[MBOX_CNT]; >>> + struct mbox_chan chans[MBOX_CNT]; >>> +}; >> >> The above two structure declaration could use kernel style documentation. > > Can you please clarify or give an example? I looked into several files > in drivers/mailbox/ and drivers/irqchip but could not find what I need > to tweak. http://lxr.free-electrons.com/source/drivers/mailbox/mailbox-sti.c#L42 > >> >>> + >>> +static void mb_chan_send_msg(struct slimpro_mbox_chan *mb_chan, u32 *msg) >>> +{ >>> + writel(msg[1], mb_chan->reg + REG_DB_DOUT0); >>> + writel(msg[2], mb_chan->reg + REG_DB_DOUT1); >>> + writel(msg[0], mb_chan->reg + REG_DB_OUT); >>> +} >>> + >>> +static void mb_chan_recv_msg(struct slimpro_mbox_chan *mb_chan) >>> +{ >>> + mb_chan->rx_msg[1] = readl(mb_chan->reg + REG_DB_DIN0); >>> + mb_chan->rx_msg[2] = readl(mb_chan->reg + REG_DB_DIN1); >>> + mb_chan->rx_msg[0] = readl(mb_chan->reg + REG_DB_IN); >>> +} >> >> Is there a requirement that operations in the above two functions be >> ordered? If not significant gains could be achieved by using >> writel/readl_relaxed(). Same comment for the rest of this driver. > > The 'writes' need to be in order as writing to REG_DB_OUT will trigger > interrupt, so I want the other 2 'writes' complete before it. > > After the receiver get the message, it will clear door bell available > interrupt request, this will also trigger a door bell acknowledge > interrupt. So the 'read' to get the message and the 'write' to clear > the door bell available interrupt must be in order as well. > > Regards, > Duc Dang. >> >> Thanks, >> Mathieu >> >>> + >>> +static int mb_chan_status_ack(struct slimpro_mbox_chan *mb_chan) >>> +{ >>> + u32 val = readl(mb_chan->reg + REG_DB_STAT); >>> + >>> + if (val & MBOX_STATUS_ACK_MASK) { >>> + writel(MBOX_STATUS_ACK_MASK, mb_chan->reg + REG_DB_STAT); >>> + return 1; >>> + } >>> + return 0; >>> +} >>> + >>> +static int mb_chan_status_avail(struct slimpro_mbox_chan *mb_chan) >>> +{ >>> + u32 val = readl(mb_chan->reg + REG_DB_STAT); >>> + >>> + if (val & MBOX_STATUS_AVAIL_MASK) { >>> + mb_chan_recv_msg(mb_chan); >>> + writel(MBOX_STATUS_AVAIL_MASK, mb_chan->reg + REG_DB_STAT); >>> + return 1; >>> + } >>> + return 0; >>> +} >>> + >>> +static irqreturn_t slimpro_mbox_irq(int irq, void *id) >>> +{ >>> + struct slimpro_mbox_chan *mb_chan = id; >>> + >>> + if (mb_chan_status_ack(mb_chan)) >>> + mbox_chan_txdone(mb_chan->chan, 0); >>> + >>> + if (mb_chan_status_avail(mb_chan)) >>> + mbox_chan_received_data(mb_chan->chan, mb_chan->rx_msg); >>> + >>> + return IRQ_HANDLED; >>> +} >>> + >>> +static int slimpro_mbox_send_data(struct mbox_chan *chan, void *msg) >>> +{ >>> + struct slimpro_mbox_chan *mb_chan = chan->con_priv; >>> + >>> + mb_chan_send_msg(mb_chan, msg); >>> + return 0; >>> +} >>> + >>> +static int slimpro_mbox_startup(struct mbox_chan *chan) >>> +{ >>> + struct slimpro_mbox_chan *mb_chan = chan->con_priv; >>> + int rc; >>> + u32 val; >>> + >>> + rc = devm_request_irq(mb_chan->dev, mb_chan->irq, slimpro_mbox_irq, 0, >>> + MBOX_CON_NAME, mb_chan); >>> + if (unlikely(rc)) { >>> + dev_err(mb_chan->dev, "failed to register mailbox interrupt %d\n", >>> + mb_chan->irq); >>> + return rc; >>> + } >>> + >>> + /* Enable HW interrupt */ >>> + writel(MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK, >>> + mb_chan->reg + REG_DB_STAT); >>> + /* Unmask doorbell status interrupt */ >>> + val = readl(mb_chan->reg + REG_DB_STATMASK); >>> + val &= ~(MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK); >>> + writel(val, mb_chan->reg + REG_DB_STATMASK); >>> + >>> + return 0; >>> +} >>> + >>> +static void slimpro_mbox_shutdown(struct mbox_chan *chan) >>> +{ >>> + struct slimpro_mbox_chan *mb_chan = chan->con_priv; >>> + u32 val; >>> + >>> + /* Mask doorbell status interrupt */ >>> + val = readl(mb_chan->reg + REG_DB_STATMASK); >>> + val |= (MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK); >>> + writel(val, mb_chan->reg + REG_DB_STATMASK); >>> + >>> + devm_free_irq(mb_chan->dev, mb_chan->irq, mb_chan); >>> +} >>> + >>> +static struct mbox_chan_ops slimpro_mbox_ops = { >>> + .send_data = slimpro_mbox_send_data, >>> + .startup = slimpro_mbox_startup, >>> + .shutdown = slimpro_mbox_shutdown, >>> +}; >>> + >>> +static int slimpro_mbox_probe(struct platform_device *pdev) >>> +{ >>> + struct slimpro_mbox *ctx; >>> + struct resource *regs; >>> + void __iomem *mb_base; >>> + int rc; >>> + int i; >>> + >>> + ctx = devm_kzalloc(&pdev->dev, sizeof(struct slimpro_mbox), GFP_KERNEL); >>> + if (IS_ERR(ctx)) >>> + return PTR_ERR(ctx); >>> + >>> + platform_set_drvdata(pdev, ctx); >>> + >>> + regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); >>> + mb_base = devm_ioremap(&pdev->dev, regs->start, resource_size(regs)); >>> + if (IS_ERR(mb_base)) >>> + return PTR_ERR(mb_base); >>> + >>> + /* Setup mailbox links */ >>> + for (i = 0; i < MBOX_CNT; i++) { >>> + ctx->mc[i].irq = platform_get_irq(pdev, i); >>> + if (ctx->mc[i].irq < 0) { >>> + if (i == 0) { >>> + dev_err(&pdev->dev, "no available IRQ\n"); >>> + return -EINVAL; >>> + } >>> + dev_info(&pdev->dev, "no IRQ for channel %d\n", i); >>> + break; >>> + } >>> + >>> + ctx->mc[i].dev = &pdev->dev; >>> + ctx->mc[i].reg = mb_base + i * MBOX_REG_SET_OFFSET; >>> + ctx->mc[i].chan = &ctx->chans[i]; >>> + ctx->chans[i].con_priv = &ctx->mc[i]; >>> + } >>> + >>> + /* Setup mailbox controller */ >>> + ctx->mb_ctrl.dev = &pdev->dev; >>> + ctx->mb_ctrl.chans = ctx->chans; >>> + ctx->mb_ctrl.txdone_irq = true; >>> + ctx->mb_ctrl.ops = &slimpro_mbox_ops; >>> + ctx->mb_ctrl.num_chans = i; >>> + >>> + rc = mbox_controller_register(&ctx->mb_ctrl); >>> + if (rc) { >>> + dev_err(&pdev->dev, >>> + "APM X-Gene SLIMpro MailBox register failed:%d\n", rc); >>> + return rc; >>> + } >>> + >>> + dev_info(&pdev->dev, "APM X-Gene SLIMpro MailBox registered\n"); >>> + return 0; >>> +} >>> + >>> +static int slimpro_mbox_remove(struct platform_device *pdev) >>> +{ >>> + struct slimpro_mbox *smb = platform_get_drvdata(pdev); >>> + >>> + mbox_controller_unregister(&smb->mb_ctrl); >>> + return 0; >>> +} >>> + >>> +static const struct of_device_id slimpro_of_match[] = { >>> + {.compatible = "apm,xgene-slimpro-mbox" }, >>> + { }, >>> +}; >>> +MODULE_DEVICE_TABLE(of, slimpro_of_match); >>> + >>> +#ifdef CONFIG_ACPI >>> +static const struct acpi_device_id slimpro_acpi_ids[] = { >>> + {"APMC0D01", 0}, >>> + {} >>> +}; >>> +MODULE_DEVICE_TABLE(acpi, slimpro_acpi_ids); >>> +#endif >>> + >>> +static struct platform_driver slimpro_mbox_driver = { >>> + .probe = slimpro_mbox_probe, >>> + .remove = slimpro_mbox_remove, >>> + .driver = { >>> + .name = "xgene-slimpro-mbox", >>> + .of_match_table = of_match_ptr(slimpro_of_match), >>> + .acpi_match_table = ACPI_PTR(slimpro_acpi_ids) >>> + }, >>> +}; >>> + >>> +static int __init slimpro_mbox_init(void) >>> +{ >>> + return platform_driver_register(&slimpro_mbox_driver); >>> +} >>> + >>> +static void __exit slimpro_mbox_exit(void) >>> +{ >>> + platform_driver_unregister(&slimpro_mbox_driver); >>> +} >>> + >>> +subsys_initcall(slimpro_mbox_init); >>> +module_exit(slimpro_mbox_exit); >>> + >>> +MODULE_DESCRIPTION("APM X-Gene SLIMpro Mailbox Driver"); >>> +MODULE_LICENSE("GPL"); >>> -- >>> 1.9.1 >>> -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html ^ permalink raw reply [flat|nested] 95+ messages in thread
* [PATCH v5 1/3] mailbox: Add support for APM X-Gene platform mailbox driver 2016-02-10 14:41 ` Mathieu Poirier @ 2016-02-13 3:25 ` Duc Dang -1 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2016-02-13 3:25 UTC (permalink / raw) To: linux-arm-kernel On Wed, Feb 10, 2016 at 6:41 AM, Mathieu Poirier <mathieu.poirier@linaro.org> wrote: > On 9 February 2016 at 20:46, Duc Dang <dhdang@apm.com> wrote: >> On Tue, Feb 9, 2016 at 8:40 AM, Mathieu Poirier >> <mathieu.poirier@linaro.org> wrote: >>> On 8 February 2016 at 15:04, Duc Dang <dhdang@apm.com> wrote: >>>> X-Gene mailbox controller provides 8 mailbox channels, with >>>> each channel has a dedicated interrupt line. >>>> >>>> Signed-off-by: Feng Kan <fkan@apm.com> >>>> Signed-off-by: Duc Dang <dhdang@apm.com> >>>> --- >>>> Changes since v4: >>>> - Rebase over v4.5-rc1 >>>> - Fix section mistmatch warning by removing >>>> __init in slimpro_mbox_probe declaration >>>> - Correctly print channel number when >>>> there is no IRQ for that channel >>>> >>>> Changes since v3: >>>> - Rebase over v4.4 >>>> - Remove 'id' in slimpro_mbox_chan structure >>>> - Remove small functions that are only called once >>>> and fold them into the other callers >>>> - Remove void* pointer type cast >>>> - Relax the number of mailbox IRQs condition >>>> - Use subsys_initcall to guarantee mailbox driver >>>> will be registered before any other dependent driver >>>> is loaded. >>>> >>>> drivers/mailbox/Kconfig | 9 ++ >>>> drivers/mailbox/Makefile | 2 + >>>> drivers/mailbox/mailbox-xgene-slimpro.c | 264 ++++++++++++++++++++++++++++++++ >>>> 3 files changed, 275 insertions(+) >>>> create mode 100644 drivers/mailbox/mailbox-xgene-slimpro.c >>>> >>>> diff --git a/drivers/mailbox/Kconfig b/drivers/mailbox/Kconfig >>>> index 546d05f..678e434 100644 >>>> --- a/drivers/mailbox/Kconfig >>>> +++ b/drivers/mailbox/Kconfig >>>> @@ -85,4 +85,13 @@ config MAILBOX_TEST >>>> Test client to help with testing new Controller driver >>>> implementations. >>>> >>>> +config XGENE_SLIMPRO_MBOX >>>> + tristate "APM SoC X-Gene SLIMpro Mailbox Controller" >>>> + depends on ARCH_XGENE >>>> + help >>>> + An implementation of the APM X-Gene Interprocessor Communication >>>> + Mailbox (IPCM) between the ARM 64-bit cores and SLIMpro controller. >>>> + It is used to send short messages between ARM64-bit cores and >>>> + the SLIMpro Management Engine, primarily for PM. Say Y here if you >>>> + want to use the APM X-Gene SLIMpro IPCM support. >>>> endif >>>> diff --git a/drivers/mailbox/Makefile b/drivers/mailbox/Makefile >>>> index 92435ef..b602ef8 100644 >>>> --- a/drivers/mailbox/Makefile >>>> +++ b/drivers/mailbox/Makefile >>>> @@ -17,3 +17,5 @@ obj-$(CONFIG_ALTERA_MBOX) += mailbox-altera.o >>>> obj-$(CONFIG_BCM2835_MBOX) += bcm2835-mailbox.o >>>> >>>> obj-$(CONFIG_STI_MBOX) += mailbox-sti.o >>>> + >>>> +obj-$(CONFIG_XGENE_SLIMPRO_MBOX) += mailbox-xgene-slimpro.o >>>> diff --git a/drivers/mailbox/mailbox-xgene-slimpro.c b/drivers/mailbox/mailbox-xgene-slimpro.c >>>> new file mode 100644 >>>> index 0000000..0ea1eb8 >>>> --- /dev/null >>>> +++ b/drivers/mailbox/mailbox-xgene-slimpro.c >>>> @@ -0,0 +1,264 @@ >>>> +/* >>>> + * APM X-Gene SLIMpro MailBox Driver >>>> + * >>>> + * Copyright (c) 2015, Applied Micro Circuits Corporation >>>> + * Author: Feng Kan fkan at apm.com >>>> + * >>>> + * This program is free software; you can redistribute it and/or >>>> + * modify it under the terms of the GNU General Public License as >>>> + * published by the Free Software Foundation; either version 2 of >>>> + * the License, or (at your option) any later version. >>>> + * >>>> + * This program is distributed in the hope that it will be useful, >>>> + * but WITHOUT ANY WARRANTY; without even the implied warranty of >>>> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the >>>> + * GNU General Public License for more details. >>>> + * >>>> + * You should have received a copy of the GNU General Public License >>>> + * along with this program; if not, see <http://www.gnu.org/licenses/>. >>>> + * >>>> + */ >>>> +#include <linux/acpi.h> >>>> +#include <linux/delay.h> >>>> +#include <linux/interrupt.h> >>>> +#include <linux/io.h> >>>> +#include <linux/mailbox_controller.h> >>>> +#include <linux/module.h> >>>> +#include <linux/of.h> >>>> +#include <linux/platform_device.h> >>>> +#include <linux/spinlock.h> >>>> + >>>> +#define MBOX_CON_NAME "slimpro-mbox" >>>> +#define MBOX_REG_SET_OFFSET 0x1000 >>>> +#define MBOX_CNT 8 >>>> +#define MBOX_STATUS_AVAIL_MASK BIT(16) >>>> +#define MBOX_STATUS_ACK_MASK BIT(0) >>>> + >>>> +/* Configuration and Status Registers */ >>>> +#define REG_DB_IN 0x00 >>>> +#define REG_DB_DIN0 0x04 >>>> +#define REG_DB_DIN1 0x08 >>>> +#define REG_DB_OUT 0x10 >>>> +#define REG_DB_DOUT0 0x14 >>>> +#define REG_DB_DOUT1 0x18 >>>> +#define REG_DB_STAT 0x20 >>>> +#define REG_DB_STATMASK 0x24 >>>> + >>>> +struct slimpro_mbox_chan { >>>> + struct device *dev; >>>> + struct mbox_chan *chan; >>>> + void __iomem *reg; >>>> + int irq; >>>> + u32 rx_msg[3]; >>>> +}; >>>> + >>>> +struct slimpro_mbox { >>>> + struct mbox_controller mb_ctrl; >>>> + struct slimpro_mbox_chan mc[MBOX_CNT]; >>>> + struct mbox_chan chans[MBOX_CNT]; >>>> +}; >>> >>> The above two structure declaration could use kernel style documentation. >> >> Can you please clarify or give an example? I looked into several files >> in drivers/mailbox/ and drivers/irqchip but could not find what I need >> to tweak. > > http://lxr.free-electrons.com/source/drivers/mailbox/mailbox-sti.c#L42 I am modifying the structure defintion to add description and will post a new version shortly. Regards, Duc Dang. > >> >>> >>>> + >>>> +static void mb_chan_send_msg(struct slimpro_mbox_chan *mb_chan, u32 *msg) >>>> +{ >>>> + writel(msg[1], mb_chan->reg + REG_DB_DOUT0); >>>> + writel(msg[2], mb_chan->reg + REG_DB_DOUT1); >>>> + writel(msg[0], mb_chan->reg + REG_DB_OUT); >>>> +} >>>> + >>>> +static void mb_chan_recv_msg(struct slimpro_mbox_chan *mb_chan) >>>> +{ >>>> + mb_chan->rx_msg[1] = readl(mb_chan->reg + REG_DB_DIN0); >>>> + mb_chan->rx_msg[2] = readl(mb_chan->reg + REG_DB_DIN1); >>>> + mb_chan->rx_msg[0] = readl(mb_chan->reg + REG_DB_IN); >>>> +} >>> >>> Is there a requirement that operations in the above two functions be >>> ordered? If not significant gains could be achieved by using >>> writel/readl_relaxed(). Same comment for the rest of this driver. >> >> The 'writes' need to be in order as writing to REG_DB_OUT will trigger >> interrupt, so I want the other 2 'writes' complete before it. >> >> After the receiver get the message, it will clear door bell available >> interrupt request, this will also trigger a door bell acknowledge >> interrupt. So the 'read' to get the message and the 'write' to clear >> the door bell available interrupt must be in order as well. >> >> Regards, >> Duc Dang. >>> >>> Thanks, >>> Mathieu >>> >>>> + >>>> +static int mb_chan_status_ack(struct slimpro_mbox_chan *mb_chan) >>>> +{ >>>> + u32 val = readl(mb_chan->reg + REG_DB_STAT); >>>> + >>>> + if (val & MBOX_STATUS_ACK_MASK) { >>>> + writel(MBOX_STATUS_ACK_MASK, mb_chan->reg + REG_DB_STAT); >>>> + return 1; >>>> + } >>>> + return 0; >>>> +} >>>> + >>>> +static int mb_chan_status_avail(struct slimpro_mbox_chan *mb_chan) >>>> +{ >>>> + u32 val = readl(mb_chan->reg + REG_DB_STAT); >>>> + >>>> + if (val & MBOX_STATUS_AVAIL_MASK) { >>>> + mb_chan_recv_msg(mb_chan); >>>> + writel(MBOX_STATUS_AVAIL_MASK, mb_chan->reg + REG_DB_STAT); >>>> + return 1; >>>> + } >>>> + return 0; >>>> +} >>>> + >>>> +static irqreturn_t slimpro_mbox_irq(int irq, void *id) >>>> +{ >>>> + struct slimpro_mbox_chan *mb_chan = id; >>>> + >>>> + if (mb_chan_status_ack(mb_chan)) >>>> + mbox_chan_txdone(mb_chan->chan, 0); >>>> + >>>> + if (mb_chan_status_avail(mb_chan)) >>>> + mbox_chan_received_data(mb_chan->chan, mb_chan->rx_msg); >>>> + >>>> + return IRQ_HANDLED; >>>> +} >>>> + >>>> +static int slimpro_mbox_send_data(struct mbox_chan *chan, void *msg) >>>> +{ >>>> + struct slimpro_mbox_chan *mb_chan = chan->con_priv; >>>> + >>>> + mb_chan_send_msg(mb_chan, msg); >>>> + return 0; >>>> +} >>>> + >>>> +static int slimpro_mbox_startup(struct mbox_chan *chan) >>>> +{ >>>> + struct slimpro_mbox_chan *mb_chan = chan->con_priv; >>>> + int rc; >>>> + u32 val; >>>> + >>>> + rc = devm_request_irq(mb_chan->dev, mb_chan->irq, slimpro_mbox_irq, 0, >>>> + MBOX_CON_NAME, mb_chan); >>>> + if (unlikely(rc)) { >>>> + dev_err(mb_chan->dev, "failed to register mailbox interrupt %d\n", >>>> + mb_chan->irq); >>>> + return rc; >>>> + } >>>> + >>>> + /* Enable HW interrupt */ >>>> + writel(MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK, >>>> + mb_chan->reg + REG_DB_STAT); >>>> + /* Unmask doorbell status interrupt */ >>>> + val = readl(mb_chan->reg + REG_DB_STATMASK); >>>> + val &= ~(MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK); >>>> + writel(val, mb_chan->reg + REG_DB_STATMASK); >>>> + >>>> + return 0; >>>> +} >>>> + >>>> +static void slimpro_mbox_shutdown(struct mbox_chan *chan) >>>> +{ >>>> + struct slimpro_mbox_chan *mb_chan = chan->con_priv; >>>> + u32 val; >>>> + >>>> + /* Mask doorbell status interrupt */ >>>> + val = readl(mb_chan->reg + REG_DB_STATMASK); >>>> + val |= (MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK); >>>> + writel(val, mb_chan->reg + REG_DB_STATMASK); >>>> + >>>> + devm_free_irq(mb_chan->dev, mb_chan->irq, mb_chan); >>>> +} >>>> + >>>> +static struct mbox_chan_ops slimpro_mbox_ops = { >>>> + .send_data = slimpro_mbox_send_data, >>>> + .startup = slimpro_mbox_startup, >>>> + .shutdown = slimpro_mbox_shutdown, >>>> +}; >>>> + >>>> +static int slimpro_mbox_probe(struct platform_device *pdev) >>>> +{ >>>> + struct slimpro_mbox *ctx; >>>> + struct resource *regs; >>>> + void __iomem *mb_base; >>>> + int rc; >>>> + int i; >>>> + >>>> + ctx = devm_kzalloc(&pdev->dev, sizeof(struct slimpro_mbox), GFP_KERNEL); >>>> + if (IS_ERR(ctx)) >>>> + return PTR_ERR(ctx); >>>> + >>>> + platform_set_drvdata(pdev, ctx); >>>> + >>>> + regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); >>>> + mb_base = devm_ioremap(&pdev->dev, regs->start, resource_size(regs)); >>>> + if (IS_ERR(mb_base)) >>>> + return PTR_ERR(mb_base); >>>> + >>>> + /* Setup mailbox links */ >>>> + for (i = 0; i < MBOX_CNT; i++) { >>>> + ctx->mc[i].irq = platform_get_irq(pdev, i); >>>> + if (ctx->mc[i].irq < 0) { >>>> + if (i == 0) { >>>> + dev_err(&pdev->dev, "no available IRQ\n"); >>>> + return -EINVAL; >>>> + } >>>> + dev_info(&pdev->dev, "no IRQ for channel %d\n", i); >>>> + break; >>>> + } >>>> + >>>> + ctx->mc[i].dev = &pdev->dev; >>>> + ctx->mc[i].reg = mb_base + i * MBOX_REG_SET_OFFSET; >>>> + ctx->mc[i].chan = &ctx->chans[i]; >>>> + ctx->chans[i].con_priv = &ctx->mc[i]; >>>> + } >>>> + >>>> + /* Setup mailbox controller */ >>>> + ctx->mb_ctrl.dev = &pdev->dev; >>>> + ctx->mb_ctrl.chans = ctx->chans; >>>> + ctx->mb_ctrl.txdone_irq = true; >>>> + ctx->mb_ctrl.ops = &slimpro_mbox_ops; >>>> + ctx->mb_ctrl.num_chans = i; >>>> + >>>> + rc = mbox_controller_register(&ctx->mb_ctrl); >>>> + if (rc) { >>>> + dev_err(&pdev->dev, >>>> + "APM X-Gene SLIMpro MailBox register failed:%d\n", rc); >>>> + return rc; >>>> + } >>>> + >>>> + dev_info(&pdev->dev, "APM X-Gene SLIMpro MailBox registered\n"); >>>> + return 0; >>>> +} >>>> + >>>> +static int slimpro_mbox_remove(struct platform_device *pdev) >>>> +{ >>>> + struct slimpro_mbox *smb = platform_get_drvdata(pdev); >>>> + >>>> + mbox_controller_unregister(&smb->mb_ctrl); >>>> + return 0; >>>> +} >>>> + >>>> +static const struct of_device_id slimpro_of_match[] = { >>>> + {.compatible = "apm,xgene-slimpro-mbox" }, >>>> + { }, >>>> +}; >>>> +MODULE_DEVICE_TABLE(of, slimpro_of_match); >>>> + >>>> +#ifdef CONFIG_ACPI >>>> +static const struct acpi_device_id slimpro_acpi_ids[] = { >>>> + {"APMC0D01", 0}, >>>> + {} >>>> +}; >>>> +MODULE_DEVICE_TABLE(acpi, slimpro_acpi_ids); >>>> +#endif >>>> + >>>> +static struct platform_driver slimpro_mbox_driver = { >>>> + .probe = slimpro_mbox_probe, >>>> + .remove = slimpro_mbox_remove, >>>> + .driver = { >>>> + .name = "xgene-slimpro-mbox", >>>> + .of_match_table = of_match_ptr(slimpro_of_match), >>>> + .acpi_match_table = ACPI_PTR(slimpro_acpi_ids) >>>> + }, >>>> +}; >>>> + >>>> +static int __init slimpro_mbox_init(void) >>>> +{ >>>> + return platform_driver_register(&slimpro_mbox_driver); >>>> +} >>>> + >>>> +static void __exit slimpro_mbox_exit(void) >>>> +{ >>>> + platform_driver_unregister(&slimpro_mbox_driver); >>>> +} >>>> + >>>> +subsys_initcall(slimpro_mbox_init); >>>> +module_exit(slimpro_mbox_exit); >>>> + >>>> +MODULE_DESCRIPTION("APM X-Gene SLIMpro Mailbox Driver"); >>>> +MODULE_LICENSE("GPL"); >>>> -- >>>> 1.9.1 >>>> ^ permalink raw reply [flat|nested] 95+ messages in thread
* Re: [PATCH v5 1/3] mailbox: Add support for APM X-Gene platform mailbox driver @ 2016-02-13 3:25 ` Duc Dang 0 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2016-02-13 3:25 UTC (permalink / raw) To: Mathieu Poirier Cc: Jassi Brar, Rob Herring, Paul Bolle, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, patches, Feng Kan On Wed, Feb 10, 2016 at 6:41 AM, Mathieu Poirier <mathieu.poirier@linaro.org> wrote: > On 9 February 2016 at 20:46, Duc Dang <dhdang@apm.com> wrote: >> On Tue, Feb 9, 2016 at 8:40 AM, Mathieu Poirier >> <mathieu.poirier@linaro.org> wrote: >>> On 8 February 2016 at 15:04, Duc Dang <dhdang@apm.com> wrote: >>>> X-Gene mailbox controller provides 8 mailbox channels, with >>>> each channel has a dedicated interrupt line. >>>> >>>> Signed-off-by: Feng Kan <fkan@apm.com> >>>> Signed-off-by: Duc Dang <dhdang@apm.com> >>>> --- >>>> Changes since v4: >>>> - Rebase over v4.5-rc1 >>>> - Fix section mistmatch warning by removing >>>> __init in slimpro_mbox_probe declaration >>>> - Correctly print channel number when >>>> there is no IRQ for that channel >>>> >>>> Changes since v3: >>>> - Rebase over v4.4 >>>> - Remove 'id' in slimpro_mbox_chan structure >>>> - Remove small functions that are only called once >>>> and fold them into the other callers >>>> - Remove void* pointer type cast >>>> - Relax the number of mailbox IRQs condition >>>> - Use subsys_initcall to guarantee mailbox driver >>>> will be registered before any other dependent driver >>>> is loaded. >>>> >>>> drivers/mailbox/Kconfig | 9 ++ >>>> drivers/mailbox/Makefile | 2 + >>>> drivers/mailbox/mailbox-xgene-slimpro.c | 264 ++++++++++++++++++++++++++++++++ >>>> 3 files changed, 275 insertions(+) >>>> create mode 100644 drivers/mailbox/mailbox-xgene-slimpro.c >>>> >>>> diff --git a/drivers/mailbox/Kconfig b/drivers/mailbox/Kconfig >>>> index 546d05f..678e434 100644 >>>> --- a/drivers/mailbox/Kconfig >>>> +++ b/drivers/mailbox/Kconfig >>>> @@ -85,4 +85,13 @@ config MAILBOX_TEST >>>> Test client to help with testing new Controller driver >>>> implementations. >>>> >>>> +config XGENE_SLIMPRO_MBOX >>>> + tristate "APM SoC X-Gene SLIMpro Mailbox Controller" >>>> + depends on ARCH_XGENE >>>> + help >>>> + An implementation of the APM X-Gene Interprocessor Communication >>>> + Mailbox (IPCM) between the ARM 64-bit cores and SLIMpro controller. >>>> + It is used to send short messages between ARM64-bit cores and >>>> + the SLIMpro Management Engine, primarily for PM. Say Y here if you >>>> + want to use the APM X-Gene SLIMpro IPCM support. >>>> endif >>>> diff --git a/drivers/mailbox/Makefile b/drivers/mailbox/Makefile >>>> index 92435ef..b602ef8 100644 >>>> --- a/drivers/mailbox/Makefile >>>> +++ b/drivers/mailbox/Makefile >>>> @@ -17,3 +17,5 @@ obj-$(CONFIG_ALTERA_MBOX) += mailbox-altera.o >>>> obj-$(CONFIG_BCM2835_MBOX) += bcm2835-mailbox.o >>>> >>>> obj-$(CONFIG_STI_MBOX) += mailbox-sti.o >>>> + >>>> +obj-$(CONFIG_XGENE_SLIMPRO_MBOX) += mailbox-xgene-slimpro.o >>>> diff --git a/drivers/mailbox/mailbox-xgene-slimpro.c b/drivers/mailbox/mailbox-xgene-slimpro.c >>>> new file mode 100644 >>>> index 0000000..0ea1eb8 >>>> --- /dev/null >>>> +++ b/drivers/mailbox/mailbox-xgene-slimpro.c >>>> @@ -0,0 +1,264 @@ >>>> +/* >>>> + * APM X-Gene SLIMpro MailBox Driver >>>> + * >>>> + * Copyright (c) 2015, Applied Micro Circuits Corporation >>>> + * Author: Feng Kan fkan@apm.com >>>> + * >>>> + * This program is free software; you can redistribute it and/or >>>> + * modify it under the terms of the GNU General Public License as >>>> + * published by the Free Software Foundation; either version 2 of >>>> + * the License, or (at your option) any later version. >>>> + * >>>> + * This program is distributed in the hope that it will be useful, >>>> + * but WITHOUT ANY WARRANTY; without even the implied warranty of >>>> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the >>>> + * GNU General Public License for more details. >>>> + * >>>> + * You should have received a copy of the GNU General Public License >>>> + * along with this program; if not, see <http://www.gnu.org/licenses/>. >>>> + * >>>> + */ >>>> +#include <linux/acpi.h> >>>> +#include <linux/delay.h> >>>> +#include <linux/interrupt.h> >>>> +#include <linux/io.h> >>>> +#include <linux/mailbox_controller.h> >>>> +#include <linux/module.h> >>>> +#include <linux/of.h> >>>> +#include <linux/platform_device.h> >>>> +#include <linux/spinlock.h> >>>> + >>>> +#define MBOX_CON_NAME "slimpro-mbox" >>>> +#define MBOX_REG_SET_OFFSET 0x1000 >>>> +#define MBOX_CNT 8 >>>> +#define MBOX_STATUS_AVAIL_MASK BIT(16) >>>> +#define MBOX_STATUS_ACK_MASK BIT(0) >>>> + >>>> +/* Configuration and Status Registers */ >>>> +#define REG_DB_IN 0x00 >>>> +#define REG_DB_DIN0 0x04 >>>> +#define REG_DB_DIN1 0x08 >>>> +#define REG_DB_OUT 0x10 >>>> +#define REG_DB_DOUT0 0x14 >>>> +#define REG_DB_DOUT1 0x18 >>>> +#define REG_DB_STAT 0x20 >>>> +#define REG_DB_STATMASK 0x24 >>>> + >>>> +struct slimpro_mbox_chan { >>>> + struct device *dev; >>>> + struct mbox_chan *chan; >>>> + void __iomem *reg; >>>> + int irq; >>>> + u32 rx_msg[3]; >>>> +}; >>>> + >>>> +struct slimpro_mbox { >>>> + struct mbox_controller mb_ctrl; >>>> + struct slimpro_mbox_chan mc[MBOX_CNT]; >>>> + struct mbox_chan chans[MBOX_CNT]; >>>> +}; >>> >>> The above two structure declaration could use kernel style documentation. >> >> Can you please clarify or give an example? I looked into several files >> in drivers/mailbox/ and drivers/irqchip but could not find what I need >> to tweak. > > http://lxr.free-electrons.com/source/drivers/mailbox/mailbox-sti.c#L42 I am modifying the structure defintion to add description and will post a new version shortly. Regards, Duc Dang. > >> >>> >>>> + >>>> +static void mb_chan_send_msg(struct slimpro_mbox_chan *mb_chan, u32 *msg) >>>> +{ >>>> + writel(msg[1], mb_chan->reg + REG_DB_DOUT0); >>>> + writel(msg[2], mb_chan->reg + REG_DB_DOUT1); >>>> + writel(msg[0], mb_chan->reg + REG_DB_OUT); >>>> +} >>>> + >>>> +static void mb_chan_recv_msg(struct slimpro_mbox_chan *mb_chan) >>>> +{ >>>> + mb_chan->rx_msg[1] = readl(mb_chan->reg + REG_DB_DIN0); >>>> + mb_chan->rx_msg[2] = readl(mb_chan->reg + REG_DB_DIN1); >>>> + mb_chan->rx_msg[0] = readl(mb_chan->reg + REG_DB_IN); >>>> +} >>> >>> Is there a requirement that operations in the above two functions be >>> ordered? If not significant gains could be achieved by using >>> writel/readl_relaxed(). Same comment for the rest of this driver. >> >> The 'writes' need to be in order as writing to REG_DB_OUT will trigger >> interrupt, so I want the other 2 'writes' complete before it. >> >> After the receiver get the message, it will clear door bell available >> interrupt request, this will also trigger a door bell acknowledge >> interrupt. So the 'read' to get the message and the 'write' to clear >> the door bell available interrupt must be in order as well. >> >> Regards, >> Duc Dang. >>> >>> Thanks, >>> Mathieu >>> >>>> + >>>> +static int mb_chan_status_ack(struct slimpro_mbox_chan *mb_chan) >>>> +{ >>>> + u32 val = readl(mb_chan->reg + REG_DB_STAT); >>>> + >>>> + if (val & MBOX_STATUS_ACK_MASK) { >>>> + writel(MBOX_STATUS_ACK_MASK, mb_chan->reg + REG_DB_STAT); >>>> + return 1; >>>> + } >>>> + return 0; >>>> +} >>>> + >>>> +static int mb_chan_status_avail(struct slimpro_mbox_chan *mb_chan) >>>> +{ >>>> + u32 val = readl(mb_chan->reg + REG_DB_STAT); >>>> + >>>> + if (val & MBOX_STATUS_AVAIL_MASK) { >>>> + mb_chan_recv_msg(mb_chan); >>>> + writel(MBOX_STATUS_AVAIL_MASK, mb_chan->reg + REG_DB_STAT); >>>> + return 1; >>>> + } >>>> + return 0; >>>> +} >>>> + >>>> +static irqreturn_t slimpro_mbox_irq(int irq, void *id) >>>> +{ >>>> + struct slimpro_mbox_chan *mb_chan = id; >>>> + >>>> + if (mb_chan_status_ack(mb_chan)) >>>> + mbox_chan_txdone(mb_chan->chan, 0); >>>> + >>>> + if (mb_chan_status_avail(mb_chan)) >>>> + mbox_chan_received_data(mb_chan->chan, mb_chan->rx_msg); >>>> + >>>> + return IRQ_HANDLED; >>>> +} >>>> + >>>> +static int slimpro_mbox_send_data(struct mbox_chan *chan, void *msg) >>>> +{ >>>> + struct slimpro_mbox_chan *mb_chan = chan->con_priv; >>>> + >>>> + mb_chan_send_msg(mb_chan, msg); >>>> + return 0; >>>> +} >>>> + >>>> +static int slimpro_mbox_startup(struct mbox_chan *chan) >>>> +{ >>>> + struct slimpro_mbox_chan *mb_chan = chan->con_priv; >>>> + int rc; >>>> + u32 val; >>>> + >>>> + rc = devm_request_irq(mb_chan->dev, mb_chan->irq, slimpro_mbox_irq, 0, >>>> + MBOX_CON_NAME, mb_chan); >>>> + if (unlikely(rc)) { >>>> + dev_err(mb_chan->dev, "failed to register mailbox interrupt %d\n", >>>> + mb_chan->irq); >>>> + return rc; >>>> + } >>>> + >>>> + /* Enable HW interrupt */ >>>> + writel(MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK, >>>> + mb_chan->reg + REG_DB_STAT); >>>> + /* Unmask doorbell status interrupt */ >>>> + val = readl(mb_chan->reg + REG_DB_STATMASK); >>>> + val &= ~(MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK); >>>> + writel(val, mb_chan->reg + REG_DB_STATMASK); >>>> + >>>> + return 0; >>>> +} >>>> + >>>> +static void slimpro_mbox_shutdown(struct mbox_chan *chan) >>>> +{ >>>> + struct slimpro_mbox_chan *mb_chan = chan->con_priv; >>>> + u32 val; >>>> + >>>> + /* Mask doorbell status interrupt */ >>>> + val = readl(mb_chan->reg + REG_DB_STATMASK); >>>> + val |= (MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK); >>>> + writel(val, mb_chan->reg + REG_DB_STATMASK); >>>> + >>>> + devm_free_irq(mb_chan->dev, mb_chan->irq, mb_chan); >>>> +} >>>> + >>>> +static struct mbox_chan_ops slimpro_mbox_ops = { >>>> + .send_data = slimpro_mbox_send_data, >>>> + .startup = slimpro_mbox_startup, >>>> + .shutdown = slimpro_mbox_shutdown, >>>> +}; >>>> + >>>> +static int slimpro_mbox_probe(struct platform_device *pdev) >>>> +{ >>>> + struct slimpro_mbox *ctx; >>>> + struct resource *regs; >>>> + void __iomem *mb_base; >>>> + int rc; >>>> + int i; >>>> + >>>> + ctx = devm_kzalloc(&pdev->dev, sizeof(struct slimpro_mbox), GFP_KERNEL); >>>> + if (IS_ERR(ctx)) >>>> + return PTR_ERR(ctx); >>>> + >>>> + platform_set_drvdata(pdev, ctx); >>>> + >>>> + regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); >>>> + mb_base = devm_ioremap(&pdev->dev, regs->start, resource_size(regs)); >>>> + if (IS_ERR(mb_base)) >>>> + return PTR_ERR(mb_base); >>>> + >>>> + /* Setup mailbox links */ >>>> + for (i = 0; i < MBOX_CNT; i++) { >>>> + ctx->mc[i].irq = platform_get_irq(pdev, i); >>>> + if (ctx->mc[i].irq < 0) { >>>> + if (i == 0) { >>>> + dev_err(&pdev->dev, "no available IRQ\n"); >>>> + return -EINVAL; >>>> + } >>>> + dev_info(&pdev->dev, "no IRQ for channel %d\n", i); >>>> + break; >>>> + } >>>> + >>>> + ctx->mc[i].dev = &pdev->dev; >>>> + ctx->mc[i].reg = mb_base + i * MBOX_REG_SET_OFFSET; >>>> + ctx->mc[i].chan = &ctx->chans[i]; >>>> + ctx->chans[i].con_priv = &ctx->mc[i]; >>>> + } >>>> + >>>> + /* Setup mailbox controller */ >>>> + ctx->mb_ctrl.dev = &pdev->dev; >>>> + ctx->mb_ctrl.chans = ctx->chans; >>>> + ctx->mb_ctrl.txdone_irq = true; >>>> + ctx->mb_ctrl.ops = &slimpro_mbox_ops; >>>> + ctx->mb_ctrl.num_chans = i; >>>> + >>>> + rc = mbox_controller_register(&ctx->mb_ctrl); >>>> + if (rc) { >>>> + dev_err(&pdev->dev, >>>> + "APM X-Gene SLIMpro MailBox register failed:%d\n", rc); >>>> + return rc; >>>> + } >>>> + >>>> + dev_info(&pdev->dev, "APM X-Gene SLIMpro MailBox registered\n"); >>>> + return 0; >>>> +} >>>> + >>>> +static int slimpro_mbox_remove(struct platform_device *pdev) >>>> +{ >>>> + struct slimpro_mbox *smb = platform_get_drvdata(pdev); >>>> + >>>> + mbox_controller_unregister(&smb->mb_ctrl); >>>> + return 0; >>>> +} >>>> + >>>> +static const struct of_device_id slimpro_of_match[] = { >>>> + {.compatible = "apm,xgene-slimpro-mbox" }, >>>> + { }, >>>> +}; >>>> +MODULE_DEVICE_TABLE(of, slimpro_of_match); >>>> + >>>> +#ifdef CONFIG_ACPI >>>> +static const struct acpi_device_id slimpro_acpi_ids[] = { >>>> + {"APMC0D01", 0}, >>>> + {} >>>> +}; >>>> +MODULE_DEVICE_TABLE(acpi, slimpro_acpi_ids); >>>> +#endif >>>> + >>>> +static struct platform_driver slimpro_mbox_driver = { >>>> + .probe = slimpro_mbox_probe, >>>> + .remove = slimpro_mbox_remove, >>>> + .driver = { >>>> + .name = "xgene-slimpro-mbox", >>>> + .of_match_table = of_match_ptr(slimpro_of_match), >>>> + .acpi_match_table = ACPI_PTR(slimpro_acpi_ids) >>>> + }, >>>> +}; >>>> + >>>> +static int __init slimpro_mbox_init(void) >>>> +{ >>>> + return platform_driver_register(&slimpro_mbox_driver); >>>> +} >>>> + >>>> +static void __exit slimpro_mbox_exit(void) >>>> +{ >>>> + platform_driver_unregister(&slimpro_mbox_driver); >>>> +} >>>> + >>>> +subsys_initcall(slimpro_mbox_init); >>>> +module_exit(slimpro_mbox_exit); >>>> + >>>> +MODULE_DESCRIPTION("APM X-Gene SLIMpro Mailbox Driver"); >>>> +MODULE_LICENSE("GPL"); >>>> -- >>>> 1.9.1 >>>> ^ permalink raw reply [flat|nested] 95+ messages in thread
* [PATCH v6 0/3] mailbox: Add APM X-Gene platform mailbox driver 2016-02-10 14:41 ` Mathieu Poirier (?) @ 2016-02-13 3:39 ` Duc Dang -1 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2016-02-13 3:39 UTC (permalink / raw) To: linux-arm-kernel APM X-Gene SoC has a mailbox controller that provides communication mechanism for X-Gene Arm64 cores to communicate with X-Gene SoC's Cortex M3 (SLIMpro) processor. X-Gene mailbox controller provides 8 mailbox channels, with each channel has a dedicated interrupt line. Changes since v5: - Add more description into SlimPRO mailbox data structure Changes since v4: - Rebase over v4.5-rc1 - Fix section mismatch warning during compiling - Correctly print channel number when there is no IRQ for that channel - Change node name to mailbox at 10540000 - Correct the number of IRQs in documentation Changes since v3: - Rebase over v4.4 - Remove 'id' in slimpro_mbox_chan structure - Remove functions that are only called once and fold them into the other callers - Remove void* pointer type cast - Relax the number of mailbox IRQs condition - Fix error and address comment in documentation (xgene-slimpro-mailbox.txt) Changes since v2: - Rebase Feng's patch set over v4.3-rc5 - Remove uneccessary 'inline' in function definition - Use module_platform_driver instead of subsys_initcall - Minor coding stype clean up Changes since v1: - Add ACPI support - Use defines for reg offset Duc Dang (3): mailbox: Add support for APM X-Gene platform mailbox driver Documentation: mailbox: Add APM X-Gene SLIMpro mailbox dts documentation arm64: dts: mailbox device tree node for APM X-Gene platform. .../bindings/mailbox/xgene-slimpro-mailbox.txt | 35 +++ arch/arm64/boot/dts/apm/apm-storm.dtsi | 14 + drivers/mailbox/Kconfig | 9 + drivers/mailbox/Makefile | 2 + drivers/mailbox/mailbox-xgene-slimpro.c | 284 +++++++++++++++++++++ 5 files changed, 344 insertions(+) create mode 100644 Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt create mode 100644 drivers/mailbox/mailbox-xgene-slimpro.c -- 1.9.1 ^ permalink raw reply [flat|nested] 95+ messages in thread
* [PATCH v6 0/3] mailbox: Add APM X-Gene platform mailbox driver @ 2016-02-13 3:39 ` Duc Dang 0 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2016-02-13 3:39 UTC (permalink / raw) To: Jassi Brar, Mathieu Poirier, Rob Herring Cc: Paul Bolle, devicetree, linux-arm-kernel, linux-kernel, patches, Duc Dang APM X-Gene SoC has a mailbox controller that provides communication mechanism for X-Gene Arm64 cores to communicate with X-Gene SoC's Cortex M3 (SLIMpro) processor. X-Gene mailbox controller provides 8 mailbox channels, with each channel has a dedicated interrupt line. Changes since v5: - Add more description into SlimPRO mailbox data structure Changes since v4: - Rebase over v4.5-rc1 - Fix section mismatch warning during compiling - Correctly print channel number when there is no IRQ for that channel - Change node name to mailbox@10540000 - Correct the number of IRQs in documentation Changes since v3: - Rebase over v4.4 - Remove 'id' in slimpro_mbox_chan structure - Remove functions that are only called once and fold them into the other callers - Remove void* pointer type cast - Relax the number of mailbox IRQs condition - Fix error and address comment in documentation (xgene-slimpro-mailbox.txt) Changes since v2: - Rebase Feng's patch set over v4.3-rc5 - Remove uneccessary 'inline' in function definition - Use module_platform_driver instead of subsys_initcall - Minor coding stype clean up Changes since v1: - Add ACPI support - Use defines for reg offset Duc Dang (3): mailbox: Add support for APM X-Gene platform mailbox driver Documentation: mailbox: Add APM X-Gene SLIMpro mailbox dts documentation arm64: dts: mailbox device tree node for APM X-Gene platform. .../bindings/mailbox/xgene-slimpro-mailbox.txt | 35 +++ arch/arm64/boot/dts/apm/apm-storm.dtsi | 14 + drivers/mailbox/Kconfig | 9 + drivers/mailbox/Makefile | 2 + drivers/mailbox/mailbox-xgene-slimpro.c | 284 +++++++++++++++++++++ 5 files changed, 344 insertions(+) create mode 100644 Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt create mode 100644 drivers/mailbox/mailbox-xgene-slimpro.c -- 1.9.1 ^ permalink raw reply [flat|nested] 95+ messages in thread
* [PATCH v6 0/3] mailbox: Add APM X-Gene platform mailbox driver @ 2016-02-13 3:39 ` Duc Dang 0 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2016-02-13 3:39 UTC (permalink / raw) To: Jassi Brar, Mathieu Poirier, Rob Herring Cc: devicetree, Paul Bolle, Duc Dang, patches, linux-kernel, linux-arm-kernel APM X-Gene SoC has a mailbox controller that provides communication mechanism for X-Gene Arm64 cores to communicate with X-Gene SoC's Cortex M3 (SLIMpro) processor. X-Gene mailbox controller provides 8 mailbox channels, with each channel has a dedicated interrupt line. Changes since v5: - Add more description into SlimPRO mailbox data structure Changes since v4: - Rebase over v4.5-rc1 - Fix section mismatch warning during compiling - Correctly print channel number when there is no IRQ for that channel - Change node name to mailbox@10540000 - Correct the number of IRQs in documentation Changes since v3: - Rebase over v4.4 - Remove 'id' in slimpro_mbox_chan structure - Remove functions that are only called once and fold them into the other callers - Remove void* pointer type cast - Relax the number of mailbox IRQs condition - Fix error and address comment in documentation (xgene-slimpro-mailbox.txt) Changes since v2: - Rebase Feng's patch set over v4.3-rc5 - Remove uneccessary 'inline' in function definition - Use module_platform_driver instead of subsys_initcall - Minor coding stype clean up Changes since v1: - Add ACPI support - Use defines for reg offset Duc Dang (3): mailbox: Add support for APM X-Gene platform mailbox driver Documentation: mailbox: Add APM X-Gene SLIMpro mailbox dts documentation arm64: dts: mailbox device tree node for APM X-Gene platform. .../bindings/mailbox/xgene-slimpro-mailbox.txt | 35 +++ arch/arm64/boot/dts/apm/apm-storm.dtsi | 14 + drivers/mailbox/Kconfig | 9 + drivers/mailbox/Makefile | 2 + drivers/mailbox/mailbox-xgene-slimpro.c | 284 +++++++++++++++++++++ 5 files changed, 344 insertions(+) create mode 100644 Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt create mode 100644 drivers/mailbox/mailbox-xgene-slimpro.c -- 1.9.1 ^ permalink raw reply [flat|nested] 95+ messages in thread
* [PATCH v6 1/3] mailbox: Add support for APM X-Gene platform mailbox driver 2016-02-13 3:39 ` Duc Dang (?) @ 2016-02-13 3:39 ` Duc Dang -1 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2016-02-13 3:39 UTC (permalink / raw) To: linux-arm-kernel X-Gene mailbox controller provides 8 mailbox channels, with each channel has a dedicated interrupt line. Signed-off-by: Feng Kan <fkan@apm.com> Signed-off-by: Duc Dang <dhdang@apm.com> --- Changes since v5: - Add description for struct slimpro_mbox_chan and struct slimpro_mbox Changes since v4: - Rebase over v4.5-rc1 - Fix section mistmatch warning by removing __init in slimpro_mbox_probe declaration - Correctly print channel number when there is no IRQ for that channel Changes since v3: - Rebase over v4.4 - Remove 'id' in slimpro_mbox_chan structure - Remove small functions that are only called once and fold them into the other callers - Remove void* pointer type cast - Relax the number of mailbox IRQs condition - Use subsys_initcall to guarantee mailbox driver will be registered before any other dependent driver is loaded. drivers/mailbox/Kconfig | 9 + drivers/mailbox/Makefile | 2 + drivers/mailbox/mailbox-xgene-slimpro.c | 284 ++++++++++++++++++++++++++++++++ 3 files changed, 295 insertions(+) create mode 100644 drivers/mailbox/mailbox-xgene-slimpro.c diff --git a/drivers/mailbox/Kconfig b/drivers/mailbox/Kconfig index 546d05f..678e434 100644 --- a/drivers/mailbox/Kconfig +++ b/drivers/mailbox/Kconfig @@ -85,4 +85,13 @@ config MAILBOX_TEST Test client to help with testing new Controller driver implementations. +config XGENE_SLIMPRO_MBOX + tristate "APM SoC X-Gene SLIMpro Mailbox Controller" + depends on ARCH_XGENE + help + An implementation of the APM X-Gene Interprocessor Communication + Mailbox (IPCM) between the ARM 64-bit cores and SLIMpro controller. + It is used to send short messages between ARM64-bit cores and + the SLIMpro Management Engine, primarily for PM. Say Y here if you + want to use the APM X-Gene SLIMpro IPCM support. endif diff --git a/drivers/mailbox/Makefile b/drivers/mailbox/Makefile index 92435ef..b602ef8 100644 --- a/drivers/mailbox/Makefile +++ b/drivers/mailbox/Makefile @@ -17,3 +17,5 @@ obj-$(CONFIG_ALTERA_MBOX) += mailbox-altera.o obj-$(CONFIG_BCM2835_MBOX) += bcm2835-mailbox.o obj-$(CONFIG_STI_MBOX) += mailbox-sti.o + +obj-$(CONFIG_XGENE_SLIMPRO_MBOX) += mailbox-xgene-slimpro.o diff --git a/drivers/mailbox/mailbox-xgene-slimpro.c b/drivers/mailbox/mailbox-xgene-slimpro.c new file mode 100644 index 0000000..b5f5106 --- /dev/null +++ b/drivers/mailbox/mailbox-xgene-slimpro.c @@ -0,0 +1,284 @@ +/* + * APM X-Gene SLIMpro MailBox Driver + * + * Copyright (c) 2015, Applied Micro Circuits Corporation + * Author: Feng Kan fkan at apm.com + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <http://www.gnu.org/licenses/>. + * + */ +#include <linux/acpi.h> +#include <linux/delay.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/mailbox_controller.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/spinlock.h> + +#define MBOX_CON_NAME "slimpro-mbox" +#define MBOX_REG_SET_OFFSET 0x1000 +#define MBOX_CNT 8 +#define MBOX_STATUS_AVAIL_MASK BIT(16) +#define MBOX_STATUS_ACK_MASK BIT(0) + +/* Configuration and Status Registers */ +#define REG_DB_IN 0x00 +#define REG_DB_DIN0 0x04 +#define REG_DB_DIN1 0x08 +#define REG_DB_OUT 0x10 +#define REG_DB_DOUT0 0x14 +#define REG_DB_DOUT1 0x18 +#define REG_DB_STAT 0x20 +#define REG_DB_STATMASK 0x24 + +/** + * X-Gene SlimPRO mailbox channel information + * + * @dev: Device to which it is attached + * @chan: Pointer to mailbox communication channel + * @reg: Base address to access channel registers + * @irq: Interrupt number of the channel + * @rx_msg: Received message storage + */ +struct slimpro_mbox_chan { + struct device *dev; + struct mbox_chan *chan; + void __iomem *reg; + int irq; + u32 rx_msg[3]; +}; + +/** + * X-Gene SlimPRO Mailbox controller data + * + * X-Gene SlimPRO Mailbox controller has 8 commnunication channels. + * Each channel has a separate IRQ number assgined to it. + * + * @mb_ctrl: Representation of the commnunication channel controller + * @mc: Array of SlimPRO mailbox channels of the controller + * @chans: Array of mailbox communication channels + * + */ +struct slimpro_mbox { + struct mbox_controller mb_ctrl; + struct slimpro_mbox_chan mc[MBOX_CNT]; + struct mbox_chan chans[MBOX_CNT]; +}; + +static void mb_chan_send_msg(struct slimpro_mbox_chan *mb_chan, u32 *msg) +{ + writel(msg[1], mb_chan->reg + REG_DB_DOUT0); + writel(msg[2], mb_chan->reg + REG_DB_DOUT1); + writel(msg[0], mb_chan->reg + REG_DB_OUT); +} + +static void mb_chan_recv_msg(struct slimpro_mbox_chan *mb_chan) +{ + mb_chan->rx_msg[1] = readl(mb_chan->reg + REG_DB_DIN0); + mb_chan->rx_msg[2] = readl(mb_chan->reg + REG_DB_DIN1); + mb_chan->rx_msg[0] = readl(mb_chan->reg + REG_DB_IN); +} + +static int mb_chan_status_ack(struct slimpro_mbox_chan *mb_chan) +{ + u32 val = readl(mb_chan->reg + REG_DB_STAT); + + if (val & MBOX_STATUS_ACK_MASK) { + writel(MBOX_STATUS_ACK_MASK, mb_chan->reg + REG_DB_STAT); + return 1; + } + return 0; +} + +static int mb_chan_status_avail(struct slimpro_mbox_chan *mb_chan) +{ + u32 val = readl(mb_chan->reg + REG_DB_STAT); + + if (val & MBOX_STATUS_AVAIL_MASK) { + mb_chan_recv_msg(mb_chan); + writel(MBOX_STATUS_AVAIL_MASK, mb_chan->reg + REG_DB_STAT); + return 1; + } + return 0; +} + +static irqreturn_t slimpro_mbox_irq(int irq, void *id) +{ + struct slimpro_mbox_chan *mb_chan = id; + + if (mb_chan_status_ack(mb_chan)) + mbox_chan_txdone(mb_chan->chan, 0); + + if (mb_chan_status_avail(mb_chan)) + mbox_chan_received_data(mb_chan->chan, mb_chan->rx_msg); + + return IRQ_HANDLED; +} + +static int slimpro_mbox_send_data(struct mbox_chan *chan, void *msg) +{ + struct slimpro_mbox_chan *mb_chan = chan->con_priv; + + mb_chan_send_msg(mb_chan, msg); + return 0; +} + +static int slimpro_mbox_startup(struct mbox_chan *chan) +{ + struct slimpro_mbox_chan *mb_chan = chan->con_priv; + int rc; + u32 val; + + rc = devm_request_irq(mb_chan->dev, mb_chan->irq, slimpro_mbox_irq, 0, + MBOX_CON_NAME, mb_chan); + if (unlikely(rc)) { + dev_err(mb_chan->dev, "failed to register mailbox interrupt %d\n", + mb_chan->irq); + return rc; + } + + /* Enable HW interrupt */ + writel(MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK, + mb_chan->reg + REG_DB_STAT); + /* Unmask doorbell status interrupt */ + val = readl(mb_chan->reg + REG_DB_STATMASK); + val &= ~(MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK); + writel(val, mb_chan->reg + REG_DB_STATMASK); + + return 0; +} + +static void slimpro_mbox_shutdown(struct mbox_chan *chan) +{ + struct slimpro_mbox_chan *mb_chan = chan->con_priv; + u32 val; + + /* Mask doorbell status interrupt */ + val = readl(mb_chan->reg + REG_DB_STATMASK); + val |= (MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK); + writel(val, mb_chan->reg + REG_DB_STATMASK); + + devm_free_irq(mb_chan->dev, mb_chan->irq, mb_chan); +} + +static struct mbox_chan_ops slimpro_mbox_ops = { + .send_data = slimpro_mbox_send_data, + .startup = slimpro_mbox_startup, + .shutdown = slimpro_mbox_shutdown, +}; + +static int slimpro_mbox_probe(struct platform_device *pdev) +{ + struct slimpro_mbox *ctx; + struct resource *regs; + void __iomem *mb_base; + int rc; + int i; + + ctx = devm_kzalloc(&pdev->dev, sizeof(struct slimpro_mbox), GFP_KERNEL); + if (IS_ERR(ctx)) + return PTR_ERR(ctx); + + platform_set_drvdata(pdev, ctx); + + regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); + mb_base = devm_ioremap(&pdev->dev, regs->start, resource_size(regs)); + if (IS_ERR(mb_base)) + return PTR_ERR(mb_base); + + /* Setup mailbox links */ + for (i = 0; i < MBOX_CNT; i++) { + ctx->mc[i].irq = platform_get_irq(pdev, i); + if (ctx->mc[i].irq < 0) { + if (i == 0) { + dev_err(&pdev->dev, "no available IRQ\n"); + return -EINVAL; + } + dev_info(&pdev->dev, "no IRQ for channel %d\n", i); + break; + } + + ctx->mc[i].dev = &pdev->dev; + ctx->mc[i].reg = mb_base + i * MBOX_REG_SET_OFFSET; + ctx->mc[i].chan = &ctx->chans[i]; + ctx->chans[i].con_priv = &ctx->mc[i]; + } + + /* Setup mailbox controller */ + ctx->mb_ctrl.dev = &pdev->dev; + ctx->mb_ctrl.chans = ctx->chans; + ctx->mb_ctrl.txdone_irq = true; + ctx->mb_ctrl.ops = &slimpro_mbox_ops; + ctx->mb_ctrl.num_chans = i; + + rc = mbox_controller_register(&ctx->mb_ctrl); + if (rc) { + dev_err(&pdev->dev, + "APM X-Gene SLIMpro MailBox register failed:%d\n", rc); + return rc; + } + + dev_info(&pdev->dev, "APM X-Gene SLIMpro MailBox registered\n"); + return 0; +} + +static int slimpro_mbox_remove(struct platform_device *pdev) +{ + struct slimpro_mbox *smb = platform_get_drvdata(pdev); + + mbox_controller_unregister(&smb->mb_ctrl); + return 0; +} + +static const struct of_device_id slimpro_of_match[] = { + {.compatible = "apm,xgene-slimpro-mbox" }, + { }, +}; +MODULE_DEVICE_TABLE(of, slimpro_of_match); + +#ifdef CONFIG_ACPI +static const struct acpi_device_id slimpro_acpi_ids[] = { + {"APMC0D01", 0}, + {} +}; +MODULE_DEVICE_TABLE(acpi, slimpro_acpi_ids); +#endif + +static struct platform_driver slimpro_mbox_driver = { + .probe = slimpro_mbox_probe, + .remove = slimpro_mbox_remove, + .driver = { + .name = "xgene-slimpro-mbox", + .of_match_table = of_match_ptr(slimpro_of_match), + .acpi_match_table = ACPI_PTR(slimpro_acpi_ids) + }, +}; + +static int __init slimpro_mbox_init(void) +{ + return platform_driver_register(&slimpro_mbox_driver); +} + +static void __exit slimpro_mbox_exit(void) +{ + platform_driver_unregister(&slimpro_mbox_driver); +} + +subsys_initcall(slimpro_mbox_init); +module_exit(slimpro_mbox_exit); + +MODULE_DESCRIPTION("APM X-Gene SLIMpro Mailbox Driver"); +MODULE_LICENSE("GPL"); -- 1.9.1 ^ permalink raw reply related [flat|nested] 95+ messages in thread
* [PATCH v6 1/3] mailbox: Add support for APM X-Gene platform mailbox driver @ 2016-02-13 3:39 ` Duc Dang 0 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2016-02-13 3:39 UTC (permalink / raw) To: Jassi Brar, Mathieu Poirier, Rob Herring Cc: Paul Bolle, devicetree, linux-arm-kernel, linux-kernel, patches, Duc Dang, Feng Kan X-Gene mailbox controller provides 8 mailbox channels, with each channel has a dedicated interrupt line. Signed-off-by: Feng Kan <fkan@apm.com> Signed-off-by: Duc Dang <dhdang@apm.com> --- Changes since v5: - Add description for struct slimpro_mbox_chan and struct slimpro_mbox Changes since v4: - Rebase over v4.5-rc1 - Fix section mistmatch warning by removing __init in slimpro_mbox_probe declaration - Correctly print channel number when there is no IRQ for that channel Changes since v3: - Rebase over v4.4 - Remove 'id' in slimpro_mbox_chan structure - Remove small functions that are only called once and fold them into the other callers - Remove void* pointer type cast - Relax the number of mailbox IRQs condition - Use subsys_initcall to guarantee mailbox driver will be registered before any other dependent driver is loaded. drivers/mailbox/Kconfig | 9 + drivers/mailbox/Makefile | 2 + drivers/mailbox/mailbox-xgene-slimpro.c | 284 ++++++++++++++++++++++++++++++++ 3 files changed, 295 insertions(+) create mode 100644 drivers/mailbox/mailbox-xgene-slimpro.c diff --git a/drivers/mailbox/Kconfig b/drivers/mailbox/Kconfig index 546d05f..678e434 100644 --- a/drivers/mailbox/Kconfig +++ b/drivers/mailbox/Kconfig @@ -85,4 +85,13 @@ config MAILBOX_TEST Test client to help with testing new Controller driver implementations. +config XGENE_SLIMPRO_MBOX + tristate "APM SoC X-Gene SLIMpro Mailbox Controller" + depends on ARCH_XGENE + help + An implementation of the APM X-Gene Interprocessor Communication + Mailbox (IPCM) between the ARM 64-bit cores and SLIMpro controller. + It is used to send short messages between ARM64-bit cores and + the SLIMpro Management Engine, primarily for PM. Say Y here if you + want to use the APM X-Gene SLIMpro IPCM support. endif diff --git a/drivers/mailbox/Makefile b/drivers/mailbox/Makefile index 92435ef..b602ef8 100644 --- a/drivers/mailbox/Makefile +++ b/drivers/mailbox/Makefile @@ -17,3 +17,5 @@ obj-$(CONFIG_ALTERA_MBOX) += mailbox-altera.o obj-$(CONFIG_BCM2835_MBOX) += bcm2835-mailbox.o obj-$(CONFIG_STI_MBOX) += mailbox-sti.o + +obj-$(CONFIG_XGENE_SLIMPRO_MBOX) += mailbox-xgene-slimpro.o diff --git a/drivers/mailbox/mailbox-xgene-slimpro.c b/drivers/mailbox/mailbox-xgene-slimpro.c new file mode 100644 index 0000000..b5f5106 --- /dev/null +++ b/drivers/mailbox/mailbox-xgene-slimpro.c @@ -0,0 +1,284 @@ +/* + * APM X-Gene SLIMpro MailBox Driver + * + * Copyright (c) 2015, Applied Micro Circuits Corporation + * Author: Feng Kan fkan@apm.com + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <http://www.gnu.org/licenses/>. + * + */ +#include <linux/acpi.h> +#include <linux/delay.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/mailbox_controller.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/spinlock.h> + +#define MBOX_CON_NAME "slimpro-mbox" +#define MBOX_REG_SET_OFFSET 0x1000 +#define MBOX_CNT 8 +#define MBOX_STATUS_AVAIL_MASK BIT(16) +#define MBOX_STATUS_ACK_MASK BIT(0) + +/* Configuration and Status Registers */ +#define REG_DB_IN 0x00 +#define REG_DB_DIN0 0x04 +#define REG_DB_DIN1 0x08 +#define REG_DB_OUT 0x10 +#define REG_DB_DOUT0 0x14 +#define REG_DB_DOUT1 0x18 +#define REG_DB_STAT 0x20 +#define REG_DB_STATMASK 0x24 + +/** + * X-Gene SlimPRO mailbox channel information + * + * @dev: Device to which it is attached + * @chan: Pointer to mailbox communication channel + * @reg: Base address to access channel registers + * @irq: Interrupt number of the channel + * @rx_msg: Received message storage + */ +struct slimpro_mbox_chan { + struct device *dev; + struct mbox_chan *chan; + void __iomem *reg; + int irq; + u32 rx_msg[3]; +}; + +/** + * X-Gene SlimPRO Mailbox controller data + * + * X-Gene SlimPRO Mailbox controller has 8 commnunication channels. + * Each channel has a separate IRQ number assgined to it. + * + * @mb_ctrl: Representation of the commnunication channel controller + * @mc: Array of SlimPRO mailbox channels of the controller + * @chans: Array of mailbox communication channels + * + */ +struct slimpro_mbox { + struct mbox_controller mb_ctrl; + struct slimpro_mbox_chan mc[MBOX_CNT]; + struct mbox_chan chans[MBOX_CNT]; +}; + +static void mb_chan_send_msg(struct slimpro_mbox_chan *mb_chan, u32 *msg) +{ + writel(msg[1], mb_chan->reg + REG_DB_DOUT0); + writel(msg[2], mb_chan->reg + REG_DB_DOUT1); + writel(msg[0], mb_chan->reg + REG_DB_OUT); +} + +static void mb_chan_recv_msg(struct slimpro_mbox_chan *mb_chan) +{ + mb_chan->rx_msg[1] = readl(mb_chan->reg + REG_DB_DIN0); + mb_chan->rx_msg[2] = readl(mb_chan->reg + REG_DB_DIN1); + mb_chan->rx_msg[0] = readl(mb_chan->reg + REG_DB_IN); +} + +static int mb_chan_status_ack(struct slimpro_mbox_chan *mb_chan) +{ + u32 val = readl(mb_chan->reg + REG_DB_STAT); + + if (val & MBOX_STATUS_ACK_MASK) { + writel(MBOX_STATUS_ACK_MASK, mb_chan->reg + REG_DB_STAT); + return 1; + } + return 0; +} + +static int mb_chan_status_avail(struct slimpro_mbox_chan *mb_chan) +{ + u32 val = readl(mb_chan->reg + REG_DB_STAT); + + if (val & MBOX_STATUS_AVAIL_MASK) { + mb_chan_recv_msg(mb_chan); + writel(MBOX_STATUS_AVAIL_MASK, mb_chan->reg + REG_DB_STAT); + return 1; + } + return 0; +} + +static irqreturn_t slimpro_mbox_irq(int irq, void *id) +{ + struct slimpro_mbox_chan *mb_chan = id; + + if (mb_chan_status_ack(mb_chan)) + mbox_chan_txdone(mb_chan->chan, 0); + + if (mb_chan_status_avail(mb_chan)) + mbox_chan_received_data(mb_chan->chan, mb_chan->rx_msg); + + return IRQ_HANDLED; +} + +static int slimpro_mbox_send_data(struct mbox_chan *chan, void *msg) +{ + struct slimpro_mbox_chan *mb_chan = chan->con_priv; + + mb_chan_send_msg(mb_chan, msg); + return 0; +} + +static int slimpro_mbox_startup(struct mbox_chan *chan) +{ + struct slimpro_mbox_chan *mb_chan = chan->con_priv; + int rc; + u32 val; + + rc = devm_request_irq(mb_chan->dev, mb_chan->irq, slimpro_mbox_irq, 0, + MBOX_CON_NAME, mb_chan); + if (unlikely(rc)) { + dev_err(mb_chan->dev, "failed to register mailbox interrupt %d\n", + mb_chan->irq); + return rc; + } + + /* Enable HW interrupt */ + writel(MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK, + mb_chan->reg + REG_DB_STAT); + /* Unmask doorbell status interrupt */ + val = readl(mb_chan->reg + REG_DB_STATMASK); + val &= ~(MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK); + writel(val, mb_chan->reg + REG_DB_STATMASK); + + return 0; +} + +static void slimpro_mbox_shutdown(struct mbox_chan *chan) +{ + struct slimpro_mbox_chan *mb_chan = chan->con_priv; + u32 val; + + /* Mask doorbell status interrupt */ + val = readl(mb_chan->reg + REG_DB_STATMASK); + val |= (MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK); + writel(val, mb_chan->reg + REG_DB_STATMASK); + + devm_free_irq(mb_chan->dev, mb_chan->irq, mb_chan); +} + +static struct mbox_chan_ops slimpro_mbox_ops = { + .send_data = slimpro_mbox_send_data, + .startup = slimpro_mbox_startup, + .shutdown = slimpro_mbox_shutdown, +}; + +static int slimpro_mbox_probe(struct platform_device *pdev) +{ + struct slimpro_mbox *ctx; + struct resource *regs; + void __iomem *mb_base; + int rc; + int i; + + ctx = devm_kzalloc(&pdev->dev, sizeof(struct slimpro_mbox), GFP_KERNEL); + if (IS_ERR(ctx)) + return PTR_ERR(ctx); + + platform_set_drvdata(pdev, ctx); + + regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); + mb_base = devm_ioremap(&pdev->dev, regs->start, resource_size(regs)); + if (IS_ERR(mb_base)) + return PTR_ERR(mb_base); + + /* Setup mailbox links */ + for (i = 0; i < MBOX_CNT; i++) { + ctx->mc[i].irq = platform_get_irq(pdev, i); + if (ctx->mc[i].irq < 0) { + if (i == 0) { + dev_err(&pdev->dev, "no available IRQ\n"); + return -EINVAL; + } + dev_info(&pdev->dev, "no IRQ for channel %d\n", i); + break; + } + + ctx->mc[i].dev = &pdev->dev; + ctx->mc[i].reg = mb_base + i * MBOX_REG_SET_OFFSET; + ctx->mc[i].chan = &ctx->chans[i]; + ctx->chans[i].con_priv = &ctx->mc[i]; + } + + /* Setup mailbox controller */ + ctx->mb_ctrl.dev = &pdev->dev; + ctx->mb_ctrl.chans = ctx->chans; + ctx->mb_ctrl.txdone_irq = true; + ctx->mb_ctrl.ops = &slimpro_mbox_ops; + ctx->mb_ctrl.num_chans = i; + + rc = mbox_controller_register(&ctx->mb_ctrl); + if (rc) { + dev_err(&pdev->dev, + "APM X-Gene SLIMpro MailBox register failed:%d\n", rc); + return rc; + } + + dev_info(&pdev->dev, "APM X-Gene SLIMpro MailBox registered\n"); + return 0; +} + +static int slimpro_mbox_remove(struct platform_device *pdev) +{ + struct slimpro_mbox *smb = platform_get_drvdata(pdev); + + mbox_controller_unregister(&smb->mb_ctrl); + return 0; +} + +static const struct of_device_id slimpro_of_match[] = { + {.compatible = "apm,xgene-slimpro-mbox" }, + { }, +}; +MODULE_DEVICE_TABLE(of, slimpro_of_match); + +#ifdef CONFIG_ACPI +static const struct acpi_device_id slimpro_acpi_ids[] = { + {"APMC0D01", 0}, + {} +}; +MODULE_DEVICE_TABLE(acpi, slimpro_acpi_ids); +#endif + +static struct platform_driver slimpro_mbox_driver = { + .probe = slimpro_mbox_probe, + .remove = slimpro_mbox_remove, + .driver = { + .name = "xgene-slimpro-mbox", + .of_match_table = of_match_ptr(slimpro_of_match), + .acpi_match_table = ACPI_PTR(slimpro_acpi_ids) + }, +}; + +static int __init slimpro_mbox_init(void) +{ + return platform_driver_register(&slimpro_mbox_driver); +} + +static void __exit slimpro_mbox_exit(void) +{ + platform_driver_unregister(&slimpro_mbox_driver); +} + +subsys_initcall(slimpro_mbox_init); +module_exit(slimpro_mbox_exit); + +MODULE_DESCRIPTION("APM X-Gene SLIMpro Mailbox Driver"); +MODULE_LICENSE("GPL"); -- 1.9.1 ^ permalink raw reply related [flat|nested] 95+ messages in thread
* [PATCH v6 1/3] mailbox: Add support for APM X-Gene platform mailbox driver @ 2016-02-13 3:39 ` Duc Dang 0 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2016-02-13 3:39 UTC (permalink / raw) To: Jassi Brar, Mathieu Poirier, Rob Herring Cc: devicetree, Paul Bolle, Feng Kan, Duc Dang, patches, linux-kernel, linux-arm-kernel X-Gene mailbox controller provides 8 mailbox channels, with each channel has a dedicated interrupt line. Signed-off-by: Feng Kan <fkan@apm.com> Signed-off-by: Duc Dang <dhdang@apm.com> --- Changes since v5: - Add description for struct slimpro_mbox_chan and struct slimpro_mbox Changes since v4: - Rebase over v4.5-rc1 - Fix section mistmatch warning by removing __init in slimpro_mbox_probe declaration - Correctly print channel number when there is no IRQ for that channel Changes since v3: - Rebase over v4.4 - Remove 'id' in slimpro_mbox_chan structure - Remove small functions that are only called once and fold them into the other callers - Remove void* pointer type cast - Relax the number of mailbox IRQs condition - Use subsys_initcall to guarantee mailbox driver will be registered before any other dependent driver is loaded. drivers/mailbox/Kconfig | 9 + drivers/mailbox/Makefile | 2 + drivers/mailbox/mailbox-xgene-slimpro.c | 284 ++++++++++++++++++++++++++++++++ 3 files changed, 295 insertions(+) create mode 100644 drivers/mailbox/mailbox-xgene-slimpro.c diff --git a/drivers/mailbox/Kconfig b/drivers/mailbox/Kconfig index 546d05f..678e434 100644 --- a/drivers/mailbox/Kconfig +++ b/drivers/mailbox/Kconfig @@ -85,4 +85,13 @@ config MAILBOX_TEST Test client to help with testing new Controller driver implementations. +config XGENE_SLIMPRO_MBOX + tristate "APM SoC X-Gene SLIMpro Mailbox Controller" + depends on ARCH_XGENE + help + An implementation of the APM X-Gene Interprocessor Communication + Mailbox (IPCM) between the ARM 64-bit cores and SLIMpro controller. + It is used to send short messages between ARM64-bit cores and + the SLIMpro Management Engine, primarily for PM. Say Y here if you + want to use the APM X-Gene SLIMpro IPCM support. endif diff --git a/drivers/mailbox/Makefile b/drivers/mailbox/Makefile index 92435ef..b602ef8 100644 --- a/drivers/mailbox/Makefile +++ b/drivers/mailbox/Makefile @@ -17,3 +17,5 @@ obj-$(CONFIG_ALTERA_MBOX) += mailbox-altera.o obj-$(CONFIG_BCM2835_MBOX) += bcm2835-mailbox.o obj-$(CONFIG_STI_MBOX) += mailbox-sti.o + +obj-$(CONFIG_XGENE_SLIMPRO_MBOX) += mailbox-xgene-slimpro.o diff --git a/drivers/mailbox/mailbox-xgene-slimpro.c b/drivers/mailbox/mailbox-xgene-slimpro.c new file mode 100644 index 0000000..b5f5106 --- /dev/null +++ b/drivers/mailbox/mailbox-xgene-slimpro.c @@ -0,0 +1,284 @@ +/* + * APM X-Gene SLIMpro MailBox Driver + * + * Copyright (c) 2015, Applied Micro Circuits Corporation + * Author: Feng Kan fkan@apm.com + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <http://www.gnu.org/licenses/>. + * + */ +#include <linux/acpi.h> +#include <linux/delay.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/mailbox_controller.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/spinlock.h> + +#define MBOX_CON_NAME "slimpro-mbox" +#define MBOX_REG_SET_OFFSET 0x1000 +#define MBOX_CNT 8 +#define MBOX_STATUS_AVAIL_MASK BIT(16) +#define MBOX_STATUS_ACK_MASK BIT(0) + +/* Configuration and Status Registers */ +#define REG_DB_IN 0x00 +#define REG_DB_DIN0 0x04 +#define REG_DB_DIN1 0x08 +#define REG_DB_OUT 0x10 +#define REG_DB_DOUT0 0x14 +#define REG_DB_DOUT1 0x18 +#define REG_DB_STAT 0x20 +#define REG_DB_STATMASK 0x24 + +/** + * X-Gene SlimPRO mailbox channel information + * + * @dev: Device to which it is attached + * @chan: Pointer to mailbox communication channel + * @reg: Base address to access channel registers + * @irq: Interrupt number of the channel + * @rx_msg: Received message storage + */ +struct slimpro_mbox_chan { + struct device *dev; + struct mbox_chan *chan; + void __iomem *reg; + int irq; + u32 rx_msg[3]; +}; + +/** + * X-Gene SlimPRO Mailbox controller data + * + * X-Gene SlimPRO Mailbox controller has 8 commnunication channels. + * Each channel has a separate IRQ number assgined to it. + * + * @mb_ctrl: Representation of the commnunication channel controller + * @mc: Array of SlimPRO mailbox channels of the controller + * @chans: Array of mailbox communication channels + * + */ +struct slimpro_mbox { + struct mbox_controller mb_ctrl; + struct slimpro_mbox_chan mc[MBOX_CNT]; + struct mbox_chan chans[MBOX_CNT]; +}; + +static void mb_chan_send_msg(struct slimpro_mbox_chan *mb_chan, u32 *msg) +{ + writel(msg[1], mb_chan->reg + REG_DB_DOUT0); + writel(msg[2], mb_chan->reg + REG_DB_DOUT1); + writel(msg[0], mb_chan->reg + REG_DB_OUT); +} + +static void mb_chan_recv_msg(struct slimpro_mbox_chan *mb_chan) +{ + mb_chan->rx_msg[1] = readl(mb_chan->reg + REG_DB_DIN0); + mb_chan->rx_msg[2] = readl(mb_chan->reg + REG_DB_DIN1); + mb_chan->rx_msg[0] = readl(mb_chan->reg + REG_DB_IN); +} + +static int mb_chan_status_ack(struct slimpro_mbox_chan *mb_chan) +{ + u32 val = readl(mb_chan->reg + REG_DB_STAT); + + if (val & MBOX_STATUS_ACK_MASK) { + writel(MBOX_STATUS_ACK_MASK, mb_chan->reg + REG_DB_STAT); + return 1; + } + return 0; +} + +static int mb_chan_status_avail(struct slimpro_mbox_chan *mb_chan) +{ + u32 val = readl(mb_chan->reg + REG_DB_STAT); + + if (val & MBOX_STATUS_AVAIL_MASK) { + mb_chan_recv_msg(mb_chan); + writel(MBOX_STATUS_AVAIL_MASK, mb_chan->reg + REG_DB_STAT); + return 1; + } + return 0; +} + +static irqreturn_t slimpro_mbox_irq(int irq, void *id) +{ + struct slimpro_mbox_chan *mb_chan = id; + + if (mb_chan_status_ack(mb_chan)) + mbox_chan_txdone(mb_chan->chan, 0); + + if (mb_chan_status_avail(mb_chan)) + mbox_chan_received_data(mb_chan->chan, mb_chan->rx_msg); + + return IRQ_HANDLED; +} + +static int slimpro_mbox_send_data(struct mbox_chan *chan, void *msg) +{ + struct slimpro_mbox_chan *mb_chan = chan->con_priv; + + mb_chan_send_msg(mb_chan, msg); + return 0; +} + +static int slimpro_mbox_startup(struct mbox_chan *chan) +{ + struct slimpro_mbox_chan *mb_chan = chan->con_priv; + int rc; + u32 val; + + rc = devm_request_irq(mb_chan->dev, mb_chan->irq, slimpro_mbox_irq, 0, + MBOX_CON_NAME, mb_chan); + if (unlikely(rc)) { + dev_err(mb_chan->dev, "failed to register mailbox interrupt %d\n", + mb_chan->irq); + return rc; + } + + /* Enable HW interrupt */ + writel(MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK, + mb_chan->reg + REG_DB_STAT); + /* Unmask doorbell status interrupt */ + val = readl(mb_chan->reg + REG_DB_STATMASK); + val &= ~(MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK); + writel(val, mb_chan->reg + REG_DB_STATMASK); + + return 0; +} + +static void slimpro_mbox_shutdown(struct mbox_chan *chan) +{ + struct slimpro_mbox_chan *mb_chan = chan->con_priv; + u32 val; + + /* Mask doorbell status interrupt */ + val = readl(mb_chan->reg + REG_DB_STATMASK); + val |= (MBOX_STATUS_ACK_MASK | MBOX_STATUS_AVAIL_MASK); + writel(val, mb_chan->reg + REG_DB_STATMASK); + + devm_free_irq(mb_chan->dev, mb_chan->irq, mb_chan); +} + +static struct mbox_chan_ops slimpro_mbox_ops = { + .send_data = slimpro_mbox_send_data, + .startup = slimpro_mbox_startup, + .shutdown = slimpro_mbox_shutdown, +}; + +static int slimpro_mbox_probe(struct platform_device *pdev) +{ + struct slimpro_mbox *ctx; + struct resource *regs; + void __iomem *mb_base; + int rc; + int i; + + ctx = devm_kzalloc(&pdev->dev, sizeof(struct slimpro_mbox), GFP_KERNEL); + if (IS_ERR(ctx)) + return PTR_ERR(ctx); + + platform_set_drvdata(pdev, ctx); + + regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); + mb_base = devm_ioremap(&pdev->dev, regs->start, resource_size(regs)); + if (IS_ERR(mb_base)) + return PTR_ERR(mb_base); + + /* Setup mailbox links */ + for (i = 0; i < MBOX_CNT; i++) { + ctx->mc[i].irq = platform_get_irq(pdev, i); + if (ctx->mc[i].irq < 0) { + if (i == 0) { + dev_err(&pdev->dev, "no available IRQ\n"); + return -EINVAL; + } + dev_info(&pdev->dev, "no IRQ for channel %d\n", i); + break; + } + + ctx->mc[i].dev = &pdev->dev; + ctx->mc[i].reg = mb_base + i * MBOX_REG_SET_OFFSET; + ctx->mc[i].chan = &ctx->chans[i]; + ctx->chans[i].con_priv = &ctx->mc[i]; + } + + /* Setup mailbox controller */ + ctx->mb_ctrl.dev = &pdev->dev; + ctx->mb_ctrl.chans = ctx->chans; + ctx->mb_ctrl.txdone_irq = true; + ctx->mb_ctrl.ops = &slimpro_mbox_ops; + ctx->mb_ctrl.num_chans = i; + + rc = mbox_controller_register(&ctx->mb_ctrl); + if (rc) { + dev_err(&pdev->dev, + "APM X-Gene SLIMpro MailBox register failed:%d\n", rc); + return rc; + } + + dev_info(&pdev->dev, "APM X-Gene SLIMpro MailBox registered\n"); + return 0; +} + +static int slimpro_mbox_remove(struct platform_device *pdev) +{ + struct slimpro_mbox *smb = platform_get_drvdata(pdev); + + mbox_controller_unregister(&smb->mb_ctrl); + return 0; +} + +static const struct of_device_id slimpro_of_match[] = { + {.compatible = "apm,xgene-slimpro-mbox" }, + { }, +}; +MODULE_DEVICE_TABLE(of, slimpro_of_match); + +#ifdef CONFIG_ACPI +static const struct acpi_device_id slimpro_acpi_ids[] = { + {"APMC0D01", 0}, + {} +}; +MODULE_DEVICE_TABLE(acpi, slimpro_acpi_ids); +#endif + +static struct platform_driver slimpro_mbox_driver = { + .probe = slimpro_mbox_probe, + .remove = slimpro_mbox_remove, + .driver = { + .name = "xgene-slimpro-mbox", + .of_match_table = of_match_ptr(slimpro_of_match), + .acpi_match_table = ACPI_PTR(slimpro_acpi_ids) + }, +}; + +static int __init slimpro_mbox_init(void) +{ + return platform_driver_register(&slimpro_mbox_driver); +} + +static void __exit slimpro_mbox_exit(void) +{ + platform_driver_unregister(&slimpro_mbox_driver); +} + +subsys_initcall(slimpro_mbox_init); +module_exit(slimpro_mbox_exit); + +MODULE_DESCRIPTION("APM X-Gene SLIMpro Mailbox Driver"); +MODULE_LICENSE("GPL"); -- 1.9.1 ^ permalink raw reply related [flat|nested] 95+ messages in thread
* [PATCH v6 2/3] Documentation: mailbox: Add APM X-Gene SLIMpro mailbox dts documentation 2016-02-13 3:39 ` Duc Dang @ 2016-02-13 3:39 ` Duc Dang -1 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2016-02-13 3:39 UTC (permalink / raw) To: linux-arm-kernel This adds the APM X-Gene SLIMpro mailbox device tree node documentation. Signed-off-by: Feng Kan <fkan@apm.com> Signed-off-by: Duc Dang <dhdang@apm.com> Acked-by: Rob Herring <robh@kernel.org> --- Changes since v5: - None Changes since v4: - Rebase over v4.5-rc1 - Fix number of total interrupts in introduction text - Change node name to mailbox at 10540000 Changes since v3: - Rebase over v4.4 - Change number of mailbox IRQs to 8 - Fix white spaces, typos. .../bindings/mailbox/xgene-slimpro-mailbox.txt | 35 ++++++++++++++++++++++ 1 file changed, 35 insertions(+) create mode 100644 Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt diff --git a/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt b/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt new file mode 100644 index 0000000..e46451b --- /dev/null +++ b/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt @@ -0,0 +1,35 @@ +The APM X-Gene SLIMpro mailbox is used to communicate messages between +the ARM64 processors and the Cortex M3 (dubbed SLIMpro). It uses a simple +interrupt based door bell mechanism and can exchange simple messages using the +internal registers. + +There are total of 8 interrupts in this mailbox. Each used for an individual +door bell (or mailbox channel). + +Required properties: +- compatible: Should be as "apm,xgene-slimpro-mbox". + +- reg: Contains the mailbox register address range. + +- interrupts: 8 interrupts must be from 0 to 7, interrupt 0 define the + the interrupt for mailbox channel 0 and interrupt 1 for + mailbox channel 1 and so likewise for the reminder. + +- #mbox-cells: only one to specify the mailbox channel number. + +Example: + +Mailbox Node: + mailbox: mailbox at 10540000 { + compatible = "apm,xgene-slimpro-mbox"; + reg = <0x0 0x10540000 0x0 0xa000>; + #mbox-cells = <1>; + interrupts = <0x0 0x0 0x4>, + <0x0 0x1 0x4>, + <0x0 0x2 0x4>, + <0x0 0x3 0x4>, + <0x0 0x4 0x4>, + <0x0 0x5 0x4>, + <0x0 0x6 0x4>, + <0x0 0x7 0x4>, + }; -- 1.9.1 ^ permalink raw reply related [flat|nested] 95+ messages in thread
* [PATCH v6 2/3] Documentation: mailbox: Add APM X-Gene SLIMpro mailbox dts documentation @ 2016-02-13 3:39 ` Duc Dang 0 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2016-02-13 3:39 UTC (permalink / raw) To: Jassi Brar, Mathieu Poirier, Rob Herring Cc: Paul Bolle, devicetree, linux-arm-kernel, linux-kernel, patches, Duc Dang, Feng Kan This adds the APM X-Gene SLIMpro mailbox device tree node documentation. Signed-off-by: Feng Kan <fkan@apm.com> Signed-off-by: Duc Dang <dhdang@apm.com> Acked-by: Rob Herring <robh@kernel.org> --- Changes since v5: - None Changes since v4: - Rebase over v4.5-rc1 - Fix number of total interrupts in introduction text - Change node name to mailbox@10540000 Changes since v3: - Rebase over v4.4 - Change number of mailbox IRQs to 8 - Fix white spaces, typos. .../bindings/mailbox/xgene-slimpro-mailbox.txt | 35 ++++++++++++++++++++++ 1 file changed, 35 insertions(+) create mode 100644 Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt diff --git a/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt b/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt new file mode 100644 index 0000000..e46451b --- /dev/null +++ b/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt @@ -0,0 +1,35 @@ +The APM X-Gene SLIMpro mailbox is used to communicate messages between +the ARM64 processors and the Cortex M3 (dubbed SLIMpro). It uses a simple +interrupt based door bell mechanism and can exchange simple messages using the +internal registers. + +There are total of 8 interrupts in this mailbox. Each used for an individual +door bell (or mailbox channel). + +Required properties: +- compatible: Should be as "apm,xgene-slimpro-mbox". + +- reg: Contains the mailbox register address range. + +- interrupts: 8 interrupts must be from 0 to 7, interrupt 0 define the + the interrupt for mailbox channel 0 and interrupt 1 for + mailbox channel 1 and so likewise for the reminder. + +- #mbox-cells: only one to specify the mailbox channel number. + +Example: + +Mailbox Node: + mailbox: mailbox@10540000 { + compatible = "apm,xgene-slimpro-mbox"; + reg = <0x0 0x10540000 0x0 0xa000>; + #mbox-cells = <1>; + interrupts = <0x0 0x0 0x4>, + <0x0 0x1 0x4>, + <0x0 0x2 0x4>, + <0x0 0x3 0x4>, + <0x0 0x4 0x4>, + <0x0 0x5 0x4>, + <0x0 0x6 0x4>, + <0x0 0x7 0x4>, + }; -- 1.9.1 ^ permalink raw reply related [flat|nested] 95+ messages in thread
* [PATCH v6 3/3] arm64: dts: mailbox device tree node for APM X-Gene platform. 2016-02-13 3:39 ` Duc Dang @ 2016-02-13 3:39 ` Duc Dang -1 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2016-02-13 3:39 UTC (permalink / raw) To: linux-arm-kernel Mailbox device tree node for APM X-Gene platform. Signed-off-by: Feng Kan <fkan@apm.com> Signed-off-by: Duc Dang <dhdang@apm.com> --- Changes since v5: - None Changes since v4: - Rebase over v4.5-rc1 - Change node name to mailbox at 10540000 Changes since v3: - Rebase over v4.4 arch/arm64/boot/dts/apm/apm-storm.dtsi | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/arch/arm64/boot/dts/apm/apm-storm.dtsi b/arch/arm64/boot/dts/apm/apm-storm.dtsi index fe30f76..d91338a 100644 --- a/arch/arm64/boot/dts/apm/apm-storm.dtsi +++ b/arch/arm64/boot/dts/apm/apm-storm.dtsi @@ -691,6 +691,20 @@ msi-parent = <&msi>; }; + mailbox: mailbox at 10540000 { + compatible = "apm,xgene-slimpro-mbox"; + reg = <0x0 0x10540000 0x0 0xa000>; + #mbox-cells = <1>; + interrupts = <0x0 0x0 0x4>, + <0x0 0x1 0x4>, + <0x0 0x2 0x4>, + <0x0 0x3 0x4>, + <0x0 0x4 0x4>, + <0x0 0x5 0x4>, + <0x0 0x6 0x4>, + <0x0 0x7 0x4>; + }; + serial0: serial at 1c020000 { status = "disabled"; device_type = "serial"; -- 1.9.1 ^ permalink raw reply related [flat|nested] 95+ messages in thread
* [PATCH v6 3/3] arm64: dts: mailbox device tree node for APM X-Gene platform. @ 2016-02-13 3:39 ` Duc Dang 0 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2016-02-13 3:39 UTC (permalink / raw) To: Jassi Brar, Mathieu Poirier, Rob Herring Cc: Paul Bolle, devicetree, linux-arm-kernel, linux-kernel, patches, Duc Dang, Feng Kan Mailbox device tree node for APM X-Gene platform. Signed-off-by: Feng Kan <fkan@apm.com> Signed-off-by: Duc Dang <dhdang@apm.com> --- Changes since v5: - None Changes since v4: - Rebase over v4.5-rc1 - Change node name to mailbox@10540000 Changes since v3: - Rebase over v4.4 arch/arm64/boot/dts/apm/apm-storm.dtsi | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/arch/arm64/boot/dts/apm/apm-storm.dtsi b/arch/arm64/boot/dts/apm/apm-storm.dtsi index fe30f76..d91338a 100644 --- a/arch/arm64/boot/dts/apm/apm-storm.dtsi +++ b/arch/arm64/boot/dts/apm/apm-storm.dtsi @@ -691,6 +691,20 @@ msi-parent = <&msi>; }; + mailbox: mailbox@10540000 { + compatible = "apm,xgene-slimpro-mbox"; + reg = <0x0 0x10540000 0x0 0xa000>; + #mbox-cells = <1>; + interrupts = <0x0 0x0 0x4>, + <0x0 0x1 0x4>, + <0x0 0x2 0x4>, + <0x0 0x3 0x4>, + <0x0 0x4 0x4>, + <0x0 0x5 0x4>, + <0x0 0x6 0x4>, + <0x0 0x7 0x4>; + }; + serial0: serial@1c020000 { status = "disabled"; device_type = "serial"; -- 1.9.1 ^ permalink raw reply related [flat|nested] 95+ messages in thread
* [PATCH v6 3/3] arm64: dts: mailbox device tree node for APM X-Gene platform. 2016-02-13 3:39 ` Duc Dang @ 2016-02-25 22:33 ` Duc Dang -1 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2016-02-25 22:33 UTC (permalink / raw) To: linux-arm-kernel On Fri, Feb 12, 2016 at 7:39 PM, Duc Dang <dhdang@apm.com> wrote: > > Mailbox device tree node for APM X-Gene platform. Hi Jassi, Will you take this patch to your mailbox tree or you want me to include it into my git pull request to Olof/Arnd (arm-soc tree)? Regards, Duc Dang. > > Signed-off-by: Feng Kan <fkan@apm.com> > Signed-off-by: Duc Dang <dhdang@apm.com> > --- > Changes since v5: > - None > > Changes since v4: > - Rebase over v4.5-rc1 > - Change node name to mailbox at 10540000 > > Changes since v3: > - Rebase over v4.4 > > arch/arm64/boot/dts/apm/apm-storm.dtsi | 14 ++++++++++++++ > 1 file changed, 14 insertions(+) > > diff --git a/arch/arm64/boot/dts/apm/apm-storm.dtsi b/arch/arm64/boot/dts/apm/apm-storm.dtsi > index fe30f76..d91338a 100644 > --- a/arch/arm64/boot/dts/apm/apm-storm.dtsi > +++ b/arch/arm64/boot/dts/apm/apm-storm.dtsi > @@ -691,6 +691,20 @@ > msi-parent = <&msi>; > }; > > + mailbox: mailbox at 10540000 { > + compatible = "apm,xgene-slimpro-mbox"; > + reg = <0x0 0x10540000 0x0 0xa000>; > + #mbox-cells = <1>; > + interrupts = <0x0 0x0 0x4>, > + <0x0 0x1 0x4>, > + <0x0 0x2 0x4>, > + <0x0 0x3 0x4>, > + <0x0 0x4 0x4>, > + <0x0 0x5 0x4>, > + <0x0 0x6 0x4>, > + <0x0 0x7 0x4>; > + }; > + > serial0: serial at 1c020000 { > status = "disabled"; > device_type = "serial"; > -- > 1.9.1 > ^ permalink raw reply [flat|nested] 95+ messages in thread
* Re: [PATCH v6 3/3] arm64: dts: mailbox device tree node for APM X-Gene platform. @ 2016-02-25 22:33 ` Duc Dang 0 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2016-02-25 22:33 UTC (permalink / raw) To: Jassi Brar, Mathieu Poirier, Rob Herring Cc: Paul Bolle, Devicetree List, linux-arm, Linux Kernel Mailing List, patches, Duc Dang, Feng Kan, Arnd Bergmann, Olof Johansson On Fri, Feb 12, 2016 at 7:39 PM, Duc Dang <dhdang@apm.com> wrote: > > Mailbox device tree node for APM X-Gene platform. Hi Jassi, Will you take this patch to your mailbox tree or you want me to include it into my git pull request to Olof/Arnd (arm-soc tree)? Regards, Duc Dang. > > Signed-off-by: Feng Kan <fkan@apm.com> > Signed-off-by: Duc Dang <dhdang@apm.com> > --- > Changes since v5: > - None > > Changes since v4: > - Rebase over v4.5-rc1 > - Change node name to mailbox@10540000 > > Changes since v3: > - Rebase over v4.4 > > arch/arm64/boot/dts/apm/apm-storm.dtsi | 14 ++++++++++++++ > 1 file changed, 14 insertions(+) > > diff --git a/arch/arm64/boot/dts/apm/apm-storm.dtsi b/arch/arm64/boot/dts/apm/apm-storm.dtsi > index fe30f76..d91338a 100644 > --- a/arch/arm64/boot/dts/apm/apm-storm.dtsi > +++ b/arch/arm64/boot/dts/apm/apm-storm.dtsi > @@ -691,6 +691,20 @@ > msi-parent = <&msi>; > }; > > + mailbox: mailbox@10540000 { > + compatible = "apm,xgene-slimpro-mbox"; > + reg = <0x0 0x10540000 0x0 0xa000>; > + #mbox-cells = <1>; > + interrupts = <0x0 0x0 0x4>, > + <0x0 0x1 0x4>, > + <0x0 0x2 0x4>, > + <0x0 0x3 0x4>, > + <0x0 0x4 0x4>, > + <0x0 0x5 0x4>, > + <0x0 0x6 0x4>, > + <0x0 0x7 0x4>; > + }; > + > serial0: serial@1c020000 { > status = "disabled"; > device_type = "serial"; > -- > 1.9.1 > ^ permalink raw reply [flat|nested] 95+ messages in thread
* [PATCH v6 0/3] mailbox: Add APM X-Gene platform mailbox driver @ 2016-02-19 20:43 ` Duc Dang 0 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2016-02-19 20:43 UTC (permalink / raw) To: linux-arm-kernel On Fri, Feb 12, 2016 at 7:39 PM, Duc Dang <dhdang@apm.com> wrote: > APM X-Gene SoC has a mailbox controller that provides > communication mechanism for X-Gene Arm64 cores to communicate > with X-Gene SoC's Cortex M3 (SLIMpro) processor. > > X-Gene mailbox controller provides 8 mailbox channels, with > each channel has a dedicated interrupt line. Hi Jassi, Are you fine with this version of the patch? Regards, Duc Dang. > > Changes since v5: > - Add more description into SlimPRO > mailbox data structure > > Changes since v4: > - Rebase over v4.5-rc1 > - Fix section mismatch warning during compiling > - Correctly print channel number when there is > no IRQ for that channel > - Change node name to mailbox at 10540000 > - Correct the number of IRQs in documentation > > Changes since v3: > - Rebase over v4.4 > - Remove 'id' in slimpro_mbox_chan structure > - Remove functions that are only called once > and fold them into the other callers > - Remove void* pointer type cast > - Relax the number of mailbox IRQs condition > - Fix error and address comment in documentation > (xgene-slimpro-mailbox.txt) > > Changes since v2: > - Rebase Feng's patch set over v4.3-rc5 > - Remove uneccessary 'inline' in function definition > - Use module_platform_driver instead of subsys_initcall > - Minor coding stype clean up > > Changes since v1: > - Add ACPI support > - Use defines for reg offset > > Duc Dang (3): > mailbox: Add support for APM X-Gene platform mailbox driver > Documentation: mailbox: Add APM X-Gene SLIMpro mailbox dts > documentation > arm64: dts: mailbox device tree node for APM X-Gene platform. > > .../bindings/mailbox/xgene-slimpro-mailbox.txt | 35 +++ > arch/arm64/boot/dts/apm/apm-storm.dtsi | 14 + > drivers/mailbox/Kconfig | 9 + > drivers/mailbox/Makefile | 2 + > drivers/mailbox/mailbox-xgene-slimpro.c | 284 +++++++++++++++++++++ > 5 files changed, 344 insertions(+) > create mode 100644 Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt > create mode 100644 drivers/mailbox/mailbox-xgene-slimpro.c > > -- > 1.9.1 > ^ permalink raw reply [flat|nested] 95+ messages in thread
* Re: [PATCH v6 0/3] mailbox: Add APM X-Gene platform mailbox driver @ 2016-02-19 20:43 ` Duc Dang 0 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2016-02-19 20:43 UTC (permalink / raw) To: Jassi Brar, Mathieu Poirier, Rob Herring Cc: Paul Bolle, Devicetree List, linux-arm, Linux Kernel Mailing List, patches, Duc Dang On Fri, Feb 12, 2016 at 7:39 PM, Duc Dang <dhdang@apm.com> wrote: > APM X-Gene SoC has a mailbox controller that provides > communication mechanism for X-Gene Arm64 cores to communicate > with X-Gene SoC's Cortex M3 (SLIMpro) processor. > > X-Gene mailbox controller provides 8 mailbox channels, with > each channel has a dedicated interrupt line. Hi Jassi, Are you fine with this version of the patch? Regards, Duc Dang. > > Changes since v5: > - Add more description into SlimPRO > mailbox data structure > > Changes since v4: > - Rebase over v4.5-rc1 > - Fix section mismatch warning during compiling > - Correctly print channel number when there is > no IRQ for that channel > - Change node name to mailbox@10540000 > - Correct the number of IRQs in documentation > > Changes since v3: > - Rebase over v4.4 > - Remove 'id' in slimpro_mbox_chan structure > - Remove functions that are only called once > and fold them into the other callers > - Remove void* pointer type cast > - Relax the number of mailbox IRQs condition > - Fix error and address comment in documentation > (xgene-slimpro-mailbox.txt) > > Changes since v2: > - Rebase Feng's patch set over v4.3-rc5 > - Remove uneccessary 'inline' in function definition > - Use module_platform_driver instead of subsys_initcall > - Minor coding stype clean up > > Changes since v1: > - Add ACPI support > - Use defines for reg offset > > Duc Dang (3): > mailbox: Add support for APM X-Gene platform mailbox driver > Documentation: mailbox: Add APM X-Gene SLIMpro mailbox dts > documentation > arm64: dts: mailbox device tree node for APM X-Gene platform. > > .../bindings/mailbox/xgene-slimpro-mailbox.txt | 35 +++ > arch/arm64/boot/dts/apm/apm-storm.dtsi | 14 + > drivers/mailbox/Kconfig | 9 + > drivers/mailbox/Makefile | 2 + > drivers/mailbox/mailbox-xgene-slimpro.c | 284 +++++++++++++++++++++ > 5 files changed, 344 insertions(+) > create mode 100644 Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt > create mode 100644 drivers/mailbox/mailbox-xgene-slimpro.c > > -- > 1.9.1 > ^ permalink raw reply [flat|nested] 95+ messages in thread
* Re: [PATCH v6 0/3] mailbox: Add APM X-Gene platform mailbox driver @ 2016-02-19 20:43 ` Duc Dang 0 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2016-02-19 20:43 UTC (permalink / raw) To: Jassi Brar, Mathieu Poirier, Rob Herring Cc: Paul Bolle, Devicetree List, linux-arm, Linux Kernel Mailing List, patches, Duc Dang On Fri, Feb 12, 2016 at 7:39 PM, Duc Dang <dhdang-qTEPVZfXA3Y@public.gmane.org> wrote: > APM X-Gene SoC has a mailbox controller that provides > communication mechanism for X-Gene Arm64 cores to communicate > with X-Gene SoC's Cortex M3 (SLIMpro) processor. > > X-Gene mailbox controller provides 8 mailbox channels, with > each channel has a dedicated interrupt line. Hi Jassi, Are you fine with this version of the patch? Regards, Duc Dang. > > Changes since v5: > - Add more description into SlimPRO > mailbox data structure > > Changes since v4: > - Rebase over v4.5-rc1 > - Fix section mismatch warning during compiling > - Correctly print channel number when there is > no IRQ for that channel > - Change node name to mailbox@10540000 > - Correct the number of IRQs in documentation > > Changes since v3: > - Rebase over v4.4 > - Remove 'id' in slimpro_mbox_chan structure > - Remove functions that are only called once > and fold them into the other callers > - Remove void* pointer type cast > - Relax the number of mailbox IRQs condition > - Fix error and address comment in documentation > (xgene-slimpro-mailbox.txt) > > Changes since v2: > - Rebase Feng's patch set over v4.3-rc5 > - Remove uneccessary 'inline' in function definition > - Use module_platform_driver instead of subsys_initcall > - Minor coding stype clean up > > Changes since v1: > - Add ACPI support > - Use defines for reg offset > > Duc Dang (3): > mailbox: Add support for APM X-Gene platform mailbox driver > Documentation: mailbox: Add APM X-Gene SLIMpro mailbox dts > documentation > arm64: dts: mailbox device tree node for APM X-Gene platform. > > .../bindings/mailbox/xgene-slimpro-mailbox.txt | 35 +++ > arch/arm64/boot/dts/apm/apm-storm.dtsi | 14 + > drivers/mailbox/Kconfig | 9 + > drivers/mailbox/Makefile | 2 + > drivers/mailbox/mailbox-xgene-slimpro.c | 284 +++++++++++++++++++++ > 5 files changed, 344 insertions(+) > create mode 100644 Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt > create mode 100644 drivers/mailbox/mailbox-xgene-slimpro.c > > -- > 1.9.1 > -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html ^ permalink raw reply [flat|nested] 95+ messages in thread
* [PATCH v5 2/3] Documentation: mailbox: Add APM X-Gene SLIMpro mailbox dts documentation 2016-02-08 22:04 ` Duc Dang @ 2016-02-08 22:04 ` Duc Dang -1 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2016-02-08 22:04 UTC (permalink / raw) To: linux-arm-kernel This adds the APM X-Gene SLIMpro mailbox device tree node documentation. Signed-off-by: Feng Kan <fkan@apm.com> Signed-off-by: Duc Dang <dhdang@apm.com> Acked-by: Rob Herring <robh@kernel.org> --- Changes since v4: - Rebase over v4.5-rc1 - Fix number of total interrupts in introduction text - Change node name to mailbox at 10540000 Changes since v3: - Rebase over v4.4 - Change number of mailbox IRQs to 8 - Fix white spaces, typos. .../bindings/mailbox/xgene-slimpro-mailbox.txt | 35 ++++++++++++++++++++++ 1 file changed, 35 insertions(+) create mode 100644 Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt diff --git a/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt b/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt new file mode 100644 index 0000000..e46451b --- /dev/null +++ b/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt @@ -0,0 +1,35 @@ +The APM X-Gene SLIMpro mailbox is used to communicate messages between +the ARM64 processors and the Cortex M3 (dubbed SLIMpro). It uses a simple +interrupt based door bell mechanism and can exchange simple messages using the +internal registers. + +There are total of 8 interrupts in this mailbox. Each used for an individual +door bell (or mailbox channel). + +Required properties: +- compatible: Should be as "apm,xgene-slimpro-mbox". + +- reg: Contains the mailbox register address range. + +- interrupts: 8 interrupts must be from 0 to 7, interrupt 0 define the + the interrupt for mailbox channel 0 and interrupt 1 for + mailbox channel 1 and so likewise for the reminder. + +- #mbox-cells: only one to specify the mailbox channel number. + +Example: + +Mailbox Node: + mailbox: mailbox at 10540000 { + compatible = "apm,xgene-slimpro-mbox"; + reg = <0x0 0x10540000 0x0 0xa000>; + #mbox-cells = <1>; + interrupts = <0x0 0x0 0x4>, + <0x0 0x1 0x4>, + <0x0 0x2 0x4>, + <0x0 0x3 0x4>, + <0x0 0x4 0x4>, + <0x0 0x5 0x4>, + <0x0 0x6 0x4>, + <0x0 0x7 0x4>, + }; -- 1.9.1 ^ permalink raw reply related [flat|nested] 95+ messages in thread
* [PATCH v5 2/3] Documentation: mailbox: Add APM X-Gene SLIMpro mailbox dts documentation @ 2016-02-08 22:04 ` Duc Dang 0 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2016-02-08 22:04 UTC (permalink / raw) To: Jassi Brar, Rob Herring Cc: Paul Bolle, devicetree, linux-arm-kernel, linux-kernel, patches, Duc Dang, Feng Kan This adds the APM X-Gene SLIMpro mailbox device tree node documentation. Signed-off-by: Feng Kan <fkan@apm.com> Signed-off-by: Duc Dang <dhdang@apm.com> Acked-by: Rob Herring <robh@kernel.org> --- Changes since v4: - Rebase over v4.5-rc1 - Fix number of total interrupts in introduction text - Change node name to mailbox@10540000 Changes since v3: - Rebase over v4.4 - Change number of mailbox IRQs to 8 - Fix white spaces, typos. .../bindings/mailbox/xgene-slimpro-mailbox.txt | 35 ++++++++++++++++++++++ 1 file changed, 35 insertions(+) create mode 100644 Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt diff --git a/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt b/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt new file mode 100644 index 0000000..e46451b --- /dev/null +++ b/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt @@ -0,0 +1,35 @@ +The APM X-Gene SLIMpro mailbox is used to communicate messages between +the ARM64 processors and the Cortex M3 (dubbed SLIMpro). It uses a simple +interrupt based door bell mechanism and can exchange simple messages using the +internal registers. + +There are total of 8 interrupts in this mailbox. Each used for an individual +door bell (or mailbox channel). + +Required properties: +- compatible: Should be as "apm,xgene-slimpro-mbox". + +- reg: Contains the mailbox register address range. + +- interrupts: 8 interrupts must be from 0 to 7, interrupt 0 define the + the interrupt for mailbox channel 0 and interrupt 1 for + mailbox channel 1 and so likewise for the reminder. + +- #mbox-cells: only one to specify the mailbox channel number. + +Example: + +Mailbox Node: + mailbox: mailbox@10540000 { + compatible = "apm,xgene-slimpro-mbox"; + reg = <0x0 0x10540000 0x0 0xa000>; + #mbox-cells = <1>; + interrupts = <0x0 0x0 0x4>, + <0x0 0x1 0x4>, + <0x0 0x2 0x4>, + <0x0 0x3 0x4>, + <0x0 0x4 0x4>, + <0x0 0x5 0x4>, + <0x0 0x6 0x4>, + <0x0 0x7 0x4>, + }; -- 1.9.1 ^ permalink raw reply related [flat|nested] 95+ messages in thread
* [PATCH v5 3/3] arm64: dts: mailbox device tree node for APM X-Gene platform. 2016-02-08 22:04 ` Duc Dang @ 2016-02-08 22:04 ` Duc Dang -1 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2016-02-08 22:04 UTC (permalink / raw) To: linux-arm-kernel Mailbox device tree node for APM X-Gene platform. Signed-off-by: Feng Kan <fkan@apm.com> Signed-off-by: Duc Dang <dhdang@apm.com> --- Changes since v4: - Rebase over v4.5-rc1 - Change node name to mailbox at 10540000 Changes since v3: - Rebase over v4.4 arch/arm64/boot/dts/apm/apm-storm.dtsi | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/arch/arm64/boot/dts/apm/apm-storm.dtsi b/arch/arm64/boot/dts/apm/apm-storm.dtsi index fe30f76..d91338a 100644 --- a/arch/arm64/boot/dts/apm/apm-storm.dtsi +++ b/arch/arm64/boot/dts/apm/apm-storm.dtsi @@ -691,6 +691,20 @@ msi-parent = <&msi>; }; + mailbox: mailbox at 10540000 { + compatible = "apm,xgene-slimpro-mbox"; + reg = <0x0 0x10540000 0x0 0xa000>; + #mbox-cells = <1>; + interrupts = <0x0 0x0 0x4>, + <0x0 0x1 0x4>, + <0x0 0x2 0x4>, + <0x0 0x3 0x4>, + <0x0 0x4 0x4>, + <0x0 0x5 0x4>, + <0x0 0x6 0x4>, + <0x0 0x7 0x4>; + }; + serial0: serial at 1c020000 { status = "disabled"; device_type = "serial"; -- 1.9.1 ^ permalink raw reply related [flat|nested] 95+ messages in thread
* [PATCH v5 3/3] arm64: dts: mailbox device tree node for APM X-Gene platform. @ 2016-02-08 22:04 ` Duc Dang 0 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2016-02-08 22:04 UTC (permalink / raw) To: Jassi Brar, Rob Herring Cc: Paul Bolle, devicetree, linux-arm-kernel, linux-kernel, patches, Duc Dang, Feng Kan Mailbox device tree node for APM X-Gene platform. Signed-off-by: Feng Kan <fkan@apm.com> Signed-off-by: Duc Dang <dhdang@apm.com> --- Changes since v4: - Rebase over v4.5-rc1 - Change node name to mailbox@10540000 Changes since v3: - Rebase over v4.4 arch/arm64/boot/dts/apm/apm-storm.dtsi | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/arch/arm64/boot/dts/apm/apm-storm.dtsi b/arch/arm64/boot/dts/apm/apm-storm.dtsi index fe30f76..d91338a 100644 --- a/arch/arm64/boot/dts/apm/apm-storm.dtsi +++ b/arch/arm64/boot/dts/apm/apm-storm.dtsi @@ -691,6 +691,20 @@ msi-parent = <&msi>; }; + mailbox: mailbox@10540000 { + compatible = "apm,xgene-slimpro-mbox"; + reg = <0x0 0x10540000 0x0 0xa000>; + #mbox-cells = <1>; + interrupts = <0x0 0x0 0x4>, + <0x0 0x1 0x4>, + <0x0 0x2 0x4>, + <0x0 0x3 0x4>, + <0x0 0x4 0x4>, + <0x0 0x5 0x4>, + <0x0 0x6 0x4>, + <0x0 0x7 0x4>; + }; + serial0: serial@1c020000 { status = "disabled"; device_type = "serial"; -- 1.9.1 ^ permalink raw reply related [flat|nested] 95+ messages in thread
* [PATCH v4 2/3] Documentation: mailbox: Add APM X-Gene SLIMpro mailbox dts documentation @ 2016-01-16 2:57 ` Duc Dang 0 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2016-01-16 2:57 UTC (permalink / raw) To: linux-arm-kernel This adds the APM X-Gene SLIMpro mailbox device tree node documentation. Signed-off-by: Feng Kan <fkan@apm.com> Signed-off-by: Duc Dang <dhdang@apm.com> --- Changes since v3: - Rebase over v4.4 - Change number of mailbox IRQs to 8 - Fix white spaces, typos. .../bindings/mailbox/xgene-slimpro-mailbox.txt | 35 ++++++++++++++++++++++ 1 file changed, 35 insertions(+) create mode 100644 Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt diff --git a/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt b/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt new file mode 100644 index 0000000..91774d7 --- /dev/null +++ b/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt @@ -0,0 +1,35 @@ +The APM X-Gene SLIMpro mailbox is used to communicate messages between +the ARM64 processors and the Cortex M3 (dubbed SLIMpro). It uses a simple +interrupt based door bell mechanism and can exchange simple messages using the +internal registers. + +There are total of 7 interrupts in this mailbox. Each used for an individual +door bell (or mailbox channel). + +Required properties: +- compatible: Should be as "apm,xgene-slimpro-mbox". + +- reg: Contains the mailbox register address range. + +- interrupts: 8 interrupts must be from 0 to 7, interrupt 0 define the + the interrupt for mailbox channel 0 and interrupt 1 for + mailbox channel 1 and so likewise for the reminder. + +- #mbox-cells: only one to specify the mailbox channel number. + +Example: + +Mailbox Node: + slimpro-mbox: slimpro-mbox at 10540000 { + compatible = "apm,xgene-slimpro-mbox"; + reg = <0x0 0x10540000 0x0 0xa000>; + #mbox-cells = <1>; + interrupts = <0x0 0x0 0x4>, + <0x0 0x1 0x4>, + <0x0 0x2 0x4>, + <0x0 0x3 0x4>, + <0x0 0x4 0x4>, + <0x0 0x5 0x4>, + <0x0 0x6 0x4>, + <0x0 0x7 0x4>, + }; -- 1.9.1 ^ permalink raw reply related [flat|nested] 95+ messages in thread
* [PATCH v4 2/3] Documentation: mailbox: Add APM X-Gene SLIMpro mailbox dts documentation @ 2016-01-16 2:57 ` Duc Dang 0 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2016-01-16 2:57 UTC (permalink / raw) To: Jassi Brar, Paul Bolle, Rob Herring Cc: devicetree, linux-arm-kernel, linux-kernel, patches, Duc Dang, Feng Kan This adds the APM X-Gene SLIMpro mailbox device tree node documentation. Signed-off-by: Feng Kan <fkan@apm.com> Signed-off-by: Duc Dang <dhdang@apm.com> --- Changes since v3: - Rebase over v4.4 - Change number of mailbox IRQs to 8 - Fix white spaces, typos. .../bindings/mailbox/xgene-slimpro-mailbox.txt | 35 ++++++++++++++++++++++ 1 file changed, 35 insertions(+) create mode 100644 Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt diff --git a/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt b/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt new file mode 100644 index 0000000..91774d7 --- /dev/null +++ b/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt @@ -0,0 +1,35 @@ +The APM X-Gene SLIMpro mailbox is used to communicate messages between +the ARM64 processors and the Cortex M3 (dubbed SLIMpro). It uses a simple +interrupt based door bell mechanism and can exchange simple messages using the +internal registers. + +There are total of 7 interrupts in this mailbox. Each used for an individual +door bell (or mailbox channel). + +Required properties: +- compatible: Should be as "apm,xgene-slimpro-mbox". + +- reg: Contains the mailbox register address range. + +- interrupts: 8 interrupts must be from 0 to 7, interrupt 0 define the + the interrupt for mailbox channel 0 and interrupt 1 for + mailbox channel 1 and so likewise for the reminder. + +- #mbox-cells: only one to specify the mailbox channel number. + +Example: + +Mailbox Node: + slimpro-mbox: slimpro-mbox@10540000 { + compatible = "apm,xgene-slimpro-mbox"; + reg = <0x0 0x10540000 0x0 0xa000>; + #mbox-cells = <1>; + interrupts = <0x0 0x0 0x4>, + <0x0 0x1 0x4>, + <0x0 0x2 0x4>, + <0x0 0x3 0x4>, + <0x0 0x4 0x4>, + <0x0 0x5 0x4>, + <0x0 0x6 0x4>, + <0x0 0x7 0x4>, + }; -- 1.9.1 ^ permalink raw reply related [flat|nested] 95+ messages in thread
* [PATCH v4 2/3] Documentation: mailbox: Add APM X-Gene SLIMpro mailbox dts documentation @ 2016-01-16 2:57 ` Duc Dang 0 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2016-01-16 2:57 UTC (permalink / raw) To: Jassi Brar, Paul Bolle, Rob Herring Cc: devicetree-u79uwXL29TY76Z2rM5mHXA, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r, linux-kernel-u79uwXL29TY76Z2rM5mHXA, patches-qTEPVZfXA3Y, Duc Dang, Feng Kan This adds the APM X-Gene SLIMpro mailbox device tree node documentation. Signed-off-by: Feng Kan <fkan-qTEPVZfXA3Y@public.gmane.org> Signed-off-by: Duc Dang <dhdang-qTEPVZfXA3Y@public.gmane.org> --- Changes since v3: - Rebase over v4.4 - Change number of mailbox IRQs to 8 - Fix white spaces, typos. .../bindings/mailbox/xgene-slimpro-mailbox.txt | 35 ++++++++++++++++++++++ 1 file changed, 35 insertions(+) create mode 100644 Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt diff --git a/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt b/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt new file mode 100644 index 0000000..91774d7 --- /dev/null +++ b/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt @@ -0,0 +1,35 @@ +The APM X-Gene SLIMpro mailbox is used to communicate messages between +the ARM64 processors and the Cortex M3 (dubbed SLIMpro). It uses a simple +interrupt based door bell mechanism and can exchange simple messages using the +internal registers. + +There are total of 7 interrupts in this mailbox. Each used for an individual +door bell (or mailbox channel). + +Required properties: +- compatible: Should be as "apm,xgene-slimpro-mbox". + +- reg: Contains the mailbox register address range. + +- interrupts: 8 interrupts must be from 0 to 7, interrupt 0 define the + the interrupt for mailbox channel 0 and interrupt 1 for + mailbox channel 1 and so likewise for the reminder. + +- #mbox-cells: only one to specify the mailbox channel number. + +Example: + +Mailbox Node: + slimpro-mbox: slimpro-mbox@10540000 { + compatible = "apm,xgene-slimpro-mbox"; + reg = <0x0 0x10540000 0x0 0xa000>; + #mbox-cells = <1>; + interrupts = <0x0 0x0 0x4>, + <0x0 0x1 0x4>, + <0x0 0x2 0x4>, + <0x0 0x3 0x4>, + <0x0 0x4 0x4>, + <0x0 0x5 0x4>, + <0x0 0x6 0x4>, + <0x0 0x7 0x4>, + }; -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html ^ permalink raw reply related [flat|nested] 95+ messages in thread
* [PATCH v4 2/3] Documentation: mailbox: Add APM X-Gene SLIMpro mailbox dts documentation 2016-01-16 2:57 ` Duc Dang @ 2016-01-17 0:13 ` Rob Herring -1 siblings, 0 replies; 95+ messages in thread From: Rob Herring @ 2016-01-17 0:13 UTC (permalink / raw) To: linux-arm-kernel On Fri, Jan 15, 2016 at 06:57:18PM -0800, Duc Dang wrote: > This adds the APM X-Gene SLIMpro mailbox device tree > node documentation. > > Signed-off-by: Feng Kan <fkan@apm.com> > Signed-off-by: Duc Dang <dhdang@apm.com> > --- > Changes since v3: > - Rebase over v4.4 > - Change number of mailbox IRQs to 8 > - Fix white spaces, typos. > > .../bindings/mailbox/xgene-slimpro-mailbox.txt | 35 ++++++++++++++++++++++ > 1 file changed, 35 insertions(+) > create mode 100644 Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt > > diff --git a/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt b/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt > new file mode 100644 > index 0000000..91774d7 > --- /dev/null > +++ b/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt > @@ -0,0 +1,35 @@ > +The APM X-Gene SLIMpro mailbox is used to communicate messages between > +the ARM64 processors and the Cortex M3 (dubbed SLIMpro). It uses a simple > +interrupt based door bell mechanism and can exchange simple messages using the > +internal registers. > + > +There are total of 7 interrupts in this mailbox. Each used for an individual > +door bell (or mailbox channel). > + > +Required properties: > +- compatible: Should be as "apm,xgene-slimpro-mbox". > + > +- reg: Contains the mailbox register address range. > + > +- interrupts: 8 interrupts must be from 0 to 7, interrupt 0 define the > + the interrupt for mailbox channel 0 and interrupt 1 for > + mailbox channel 1 and so likewise for the reminder. > + > +- #mbox-cells: only one to specify the mailbox channel number. > + > +Example: > + > +Mailbox Node: > + slimpro-mbox: slimpro-mbox at 10540000 { Nit: just use mailbox@ or mbox@ (whatever others are using) for node name. Otherwise: Acked-by: Rob Herring <robh@kernel.org> ^ permalink raw reply [flat|nested] 95+ messages in thread
* Re: [PATCH v4 2/3] Documentation: mailbox: Add APM X-Gene SLIMpro mailbox dts documentation @ 2016-01-17 0:13 ` Rob Herring 0 siblings, 0 replies; 95+ messages in thread From: Rob Herring @ 2016-01-17 0:13 UTC (permalink / raw) To: Duc Dang Cc: Jassi Brar, Paul Bolle, devicetree, linux-arm-kernel, linux-kernel, patches, Feng Kan On Fri, Jan 15, 2016 at 06:57:18PM -0800, Duc Dang wrote: > This adds the APM X-Gene SLIMpro mailbox device tree > node documentation. > > Signed-off-by: Feng Kan <fkan@apm.com> > Signed-off-by: Duc Dang <dhdang@apm.com> > --- > Changes since v3: > - Rebase over v4.4 > - Change number of mailbox IRQs to 8 > - Fix white spaces, typos. > > .../bindings/mailbox/xgene-slimpro-mailbox.txt | 35 ++++++++++++++++++++++ > 1 file changed, 35 insertions(+) > create mode 100644 Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt > > diff --git a/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt b/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt > new file mode 100644 > index 0000000..91774d7 > --- /dev/null > +++ b/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt > @@ -0,0 +1,35 @@ > +The APM X-Gene SLIMpro mailbox is used to communicate messages between > +the ARM64 processors and the Cortex M3 (dubbed SLIMpro). It uses a simple > +interrupt based door bell mechanism and can exchange simple messages using the > +internal registers. > + > +There are total of 7 interrupts in this mailbox. Each used for an individual > +door bell (or mailbox channel). > + > +Required properties: > +- compatible: Should be as "apm,xgene-slimpro-mbox". > + > +- reg: Contains the mailbox register address range. > + > +- interrupts: 8 interrupts must be from 0 to 7, interrupt 0 define the > + the interrupt for mailbox channel 0 and interrupt 1 for > + mailbox channel 1 and so likewise for the reminder. > + > +- #mbox-cells: only one to specify the mailbox channel number. > + > +Example: > + > +Mailbox Node: > + slimpro-mbox: slimpro-mbox@10540000 { Nit: just use mailbox@ or mbox@ (whatever others are using) for node name. Otherwise: Acked-by: Rob Herring <robh@kernel.org> ^ permalink raw reply [flat|nested] 95+ messages in thread
* [PATCH v4 2/3] Documentation: mailbox: Add APM X-Gene SLIMpro mailbox dts documentation 2016-01-17 0:13 ` Rob Herring (?) @ 2016-01-19 23:53 ` Duc Dang -1 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2016-01-19 23:53 UTC (permalink / raw) To: linux-arm-kernel On Sat, Jan 16, 2016 at 4:13 PM, Rob Herring <robh@kernel.org> wrote: > On Fri, Jan 15, 2016 at 06:57:18PM -0800, Duc Dang wrote: >> This adds the APM X-Gene SLIMpro mailbox device tree >> node documentation. >> >> Signed-off-by: Feng Kan <fkan@apm.com> >> Signed-off-by: Duc Dang <dhdang@apm.com> >> --- >> Changes since v3: >> - Rebase over v4.4 >> - Change number of mailbox IRQs to 8 >> - Fix white spaces, typos. >> >> .../bindings/mailbox/xgene-slimpro-mailbox.txt | 35 ++++++++++++++++++++++ >> 1 file changed, 35 insertions(+) >> create mode 100644 Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt >> >> diff --git a/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt b/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt >> new file mode 100644 >> index 0000000..91774d7 >> --- /dev/null >> +++ b/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt >> @@ -0,0 +1,35 @@ >> +The APM X-Gene SLIMpro mailbox is used to communicate messages between >> +the ARM64 processors and the Cortex M3 (dubbed SLIMpro). It uses a simple >> +interrupt based door bell mechanism and can exchange simple messages using the >> +internal registers. >> + >> +There are total of 7 interrupts in this mailbox. Each used for an individual >> +door bell (or mailbox channel). >> + >> +Required properties: >> +- compatible: Should be as "apm,xgene-slimpro-mbox". >> + >> +- reg: Contains the mailbox register address range. >> + >> +- interrupts: 8 interrupts must be from 0 to 7, interrupt 0 define the >> + the interrupt for mailbox channel 0 and interrupt 1 for >> + mailbox channel 1 and so likewise for the reminder. >> + >> +- #mbox-cells: only one to specify the mailbox channel number. >> + >> +Example: >> + >> +Mailbox Node: >> + slimpro-mbox: slimpro-mbox at 10540000 { > > Nit: just use mailbox@ or mbox@ (whatever others are using) for node > name. Otherwise: > > Acked-by: Rob Herring <robh@kernel.org> Thanks, Rob. I will change the node name to mailbox at 10540000 in the document and DT as well in the next version. Regards, Duc Dang. ^ permalink raw reply [flat|nested] 95+ messages in thread
* Re: [PATCH v4 2/3] Documentation: mailbox: Add APM X-Gene SLIMpro mailbox dts documentation @ 2016-01-19 23:53 ` Duc Dang 0 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2016-01-19 23:53 UTC (permalink / raw) To: Rob Herring Cc: Jassi Brar, Paul Bolle, Devicetree List, linux-arm, Linux Kernel Mailing List, patches, Feng Kan On Sat, Jan 16, 2016 at 4:13 PM, Rob Herring <robh@kernel.org> wrote: > On Fri, Jan 15, 2016 at 06:57:18PM -0800, Duc Dang wrote: >> This adds the APM X-Gene SLIMpro mailbox device tree >> node documentation. >> >> Signed-off-by: Feng Kan <fkan@apm.com> >> Signed-off-by: Duc Dang <dhdang@apm.com> >> --- >> Changes since v3: >> - Rebase over v4.4 >> - Change number of mailbox IRQs to 8 >> - Fix white spaces, typos. >> >> .../bindings/mailbox/xgene-slimpro-mailbox.txt | 35 ++++++++++++++++++++++ >> 1 file changed, 35 insertions(+) >> create mode 100644 Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt >> >> diff --git a/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt b/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt >> new file mode 100644 >> index 0000000..91774d7 >> --- /dev/null >> +++ b/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt >> @@ -0,0 +1,35 @@ >> +The APM X-Gene SLIMpro mailbox is used to communicate messages between >> +the ARM64 processors and the Cortex M3 (dubbed SLIMpro). It uses a simple >> +interrupt based door bell mechanism and can exchange simple messages using the >> +internal registers. >> + >> +There are total of 7 interrupts in this mailbox. Each used for an individual >> +door bell (or mailbox channel). >> + >> +Required properties: >> +- compatible: Should be as "apm,xgene-slimpro-mbox". >> + >> +- reg: Contains the mailbox register address range. >> + >> +- interrupts: 8 interrupts must be from 0 to 7, interrupt 0 define the >> + the interrupt for mailbox channel 0 and interrupt 1 for >> + mailbox channel 1 and so likewise for the reminder. >> + >> +- #mbox-cells: only one to specify the mailbox channel number. >> + >> +Example: >> + >> +Mailbox Node: >> + slimpro-mbox: slimpro-mbox@10540000 { > > Nit: just use mailbox@ or mbox@ (whatever others are using) for node > name. Otherwise: > > Acked-by: Rob Herring <robh@kernel.org> Thanks, Rob. I will change the node name to mailbox@10540000 in the document and DT as well in the next version. Regards, Duc Dang. ^ permalink raw reply [flat|nested] 95+ messages in thread
* Re: [PATCH v4 2/3] Documentation: mailbox: Add APM X-Gene SLIMpro mailbox dts documentation @ 2016-01-19 23:53 ` Duc Dang 0 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2016-01-19 23:53 UTC (permalink / raw) To: Rob Herring Cc: Jassi Brar, Paul Bolle, Devicetree List, linux-arm, Linux Kernel Mailing List, patches, Feng Kan On Sat, Jan 16, 2016 at 4:13 PM, Rob Herring <robh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org> wrote: > On Fri, Jan 15, 2016 at 06:57:18PM -0800, Duc Dang wrote: >> This adds the APM X-Gene SLIMpro mailbox device tree >> node documentation. >> >> Signed-off-by: Feng Kan <fkan-qTEPVZfXA3Y@public.gmane.org> >> Signed-off-by: Duc Dang <dhdang-qTEPVZfXA3Y@public.gmane.org> >> --- >> Changes since v3: >> - Rebase over v4.4 >> - Change number of mailbox IRQs to 8 >> - Fix white spaces, typos. >> >> .../bindings/mailbox/xgene-slimpro-mailbox.txt | 35 ++++++++++++++++++++++ >> 1 file changed, 35 insertions(+) >> create mode 100644 Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt >> >> diff --git a/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt b/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt >> new file mode 100644 >> index 0000000..91774d7 >> --- /dev/null >> +++ b/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt >> @@ -0,0 +1,35 @@ >> +The APM X-Gene SLIMpro mailbox is used to communicate messages between >> +the ARM64 processors and the Cortex M3 (dubbed SLIMpro). It uses a simple >> +interrupt based door bell mechanism and can exchange simple messages using the >> +internal registers. >> + >> +There are total of 7 interrupts in this mailbox. Each used for an individual >> +door bell (or mailbox channel). >> + >> +Required properties: >> +- compatible: Should be as "apm,xgene-slimpro-mbox". >> + >> +- reg: Contains the mailbox register address range. >> + >> +- interrupts: 8 interrupts must be from 0 to 7, interrupt 0 define the >> + the interrupt for mailbox channel 0 and interrupt 1 for >> + mailbox channel 1 and so likewise for the reminder. >> + >> +- #mbox-cells: only one to specify the mailbox channel number. >> + >> +Example: >> + >> +Mailbox Node: >> + slimpro-mbox: slimpro-mbox@10540000 { > > Nit: just use mailbox@ or mbox@ (whatever others are using) for node > name. Otherwise: > > Acked-by: Rob Herring <robh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org> Thanks, Rob. I will change the node name to mailbox@10540000 in the document and DT as well in the next version. Regards, Duc Dang. -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html ^ permalink raw reply [flat|nested] 95+ messages in thread
* [PATCH v4 3/3] arm64: dts: mailbox device tree node for APM X-Gene platform. 2016-01-16 2:57 ` Duc Dang @ 2016-01-16 2:57 ` Duc Dang -1 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2016-01-16 2:57 UTC (permalink / raw) To: linux-arm-kernel Mailbox device tree node for APM X-Gene platform. Signed-off-by: Feng Kan <fkan@apm.com> Signed-off-by: Duc Dang <dhdang@apm.com> --- Changes since v3: - Rebase over v4.4 arch/arm64/boot/dts/apm/apm-storm.dtsi | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/arch/arm64/boot/dts/apm/apm-storm.dtsi b/arch/arm64/boot/dts/apm/apm-storm.dtsi index 6c5ed11..42f3fa0 100644 --- a/arch/arm64/boot/dts/apm/apm-storm.dtsi +++ b/arch/arm64/boot/dts/apm/apm-storm.dtsi @@ -642,6 +642,20 @@ msi-parent = <&msi>; }; + mailbox: slimpro-mbox at 10540000 { + compatible = "apm,xgene-slimpro-mbox"; + reg = <0x0 0x10540000 0x0 0xa000>; + #mbox-cells = <1>; + interrupts = <0x0 0x0 0x4>, + <0x0 0x1 0x4>, + <0x0 0x2 0x4>, + <0x0 0x3 0x4>, + <0x0 0x4 0x4>, + <0x0 0x5 0x4>, + <0x0 0x6 0x4>, + <0x0 0x7 0x4>; + }; + serial0: serial at 1c020000 { status = "disabled"; device_type = "serial"; -- 1.9.1 ^ permalink raw reply related [flat|nested] 95+ messages in thread
* [PATCH v4 3/3] arm64: dts: mailbox device tree node for APM X-Gene platform. @ 2016-01-16 2:57 ` Duc Dang 0 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2016-01-16 2:57 UTC (permalink / raw) To: Jassi Brar, Paul Bolle, Rob Herring Cc: devicetree, linux-arm-kernel, linux-kernel, patches, Duc Dang, Feng Kan Mailbox device tree node for APM X-Gene platform. Signed-off-by: Feng Kan <fkan@apm.com> Signed-off-by: Duc Dang <dhdang@apm.com> --- Changes since v3: - Rebase over v4.4 arch/arm64/boot/dts/apm/apm-storm.dtsi | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/arch/arm64/boot/dts/apm/apm-storm.dtsi b/arch/arm64/boot/dts/apm/apm-storm.dtsi index 6c5ed11..42f3fa0 100644 --- a/arch/arm64/boot/dts/apm/apm-storm.dtsi +++ b/arch/arm64/boot/dts/apm/apm-storm.dtsi @@ -642,6 +642,20 @@ msi-parent = <&msi>; }; + mailbox: slimpro-mbox@10540000 { + compatible = "apm,xgene-slimpro-mbox"; + reg = <0x0 0x10540000 0x0 0xa000>; + #mbox-cells = <1>; + interrupts = <0x0 0x0 0x4>, + <0x0 0x1 0x4>, + <0x0 0x2 0x4>, + <0x0 0x3 0x4>, + <0x0 0x4 0x4>, + <0x0 0x5 0x4>, + <0x0 0x6 0x4>, + <0x0 0x7 0x4>; + }; + serial0: serial@1c020000 { status = "disabled"; device_type = "serial"; -- 1.9.1 ^ permalink raw reply related [flat|nested] 95+ messages in thread
* [PATCH v3 2/3] Documentation: mailbox: Add APM X-Gene SLIMpro mailbox dts documentation 2015-11-09 18:05 ` Duc Dang @ 2015-11-09 18:05 ` Duc Dang -1 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2015-11-09 18:05 UTC (permalink / raw) To: linux-arm-kernel This adds the APM X-Gene SLIMpro mailbox device tree node documentation. [dhdang: rebase over 4.3-rc5] Signed-off-by: Feng Kan <fkan@apm.com> Signed-off-by: Duc Dang <dhdang@apm.com> --- .../bindings/mailbox/xgene-slimpro-mailbox.txt | 34 ++++++++++++++++++++++ 1 file changed, 34 insertions(+) create mode 100644 Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt diff --git a/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt b/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt new file mode 100644 index 0000000..d02a3d8 --- /dev/null +++ b/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt @@ -0,0 +1,34 @@ +The APM X-Gene SLIMpro mailbox is used to communicate messages between +the ARM64 processors and the Cortex M3 (dubbed SLIMpro). It uses a simple +interrupt based door bell mechanism and can exchange simple messages using the +internal registers. + +There are total of 7 interrupts in this mailbox. Each used for an individual +door bell (or mailbox channel). + +Required properties: +- compatible: Should be as "apm, xgene-slimpro-mbox". + +- reg: Contain the mailbox register address range. + +- interrupts: 7 interrupts must start from 0 to 6, interrupt 0 define the + the interrupt for mailbox channel 0 and interrupt 1 for + mailbox channel 1 and so likewise for the reminder. + +- #mbox-cells: only one to specify the mailbox channel number. + +Example: + +Mailbox Node: + slimpro-mbox: slimpro-mbox at 10540000 { + compatible = "apm,xgene-slimpro-mbox"; + reg = <0x0 0x10540000 0x0 0xa000>; + #mbox-cells = <1>; + interrupts = <0x0 0x0 0x4>, + <0x0 0x1 0x4>, + <0x0 0x2 0x4>, + <0x0 0x3 0x4>, + <0x0 0x4 0x4>, + <0x0 0x5 0x4>, + <0x0 0x6 0x4>, + }; -- 1.9.1 ^ permalink raw reply related [flat|nested] 95+ messages in thread
* [PATCH v3 2/3] Documentation: mailbox: Add APM X-Gene SLIMpro mailbox dts documentation @ 2015-11-09 18:05 ` Duc Dang 0 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2015-11-09 18:05 UTC (permalink / raw) To: Jassi Brar, Paul Bolle Cc: devicetree, linux-arm-kernel, linux-kernel, patches, Duc Dang, Feng Kan This adds the APM X-Gene SLIMpro mailbox device tree node documentation. [dhdang: rebase over 4.3-rc5] Signed-off-by: Feng Kan <fkan@apm.com> Signed-off-by: Duc Dang <dhdang@apm.com> --- .../bindings/mailbox/xgene-slimpro-mailbox.txt | 34 ++++++++++++++++++++++ 1 file changed, 34 insertions(+) create mode 100644 Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt diff --git a/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt b/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt new file mode 100644 index 0000000..d02a3d8 --- /dev/null +++ b/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt @@ -0,0 +1,34 @@ +The APM X-Gene SLIMpro mailbox is used to communicate messages between +the ARM64 processors and the Cortex M3 (dubbed SLIMpro). It uses a simple +interrupt based door bell mechanism and can exchange simple messages using the +internal registers. + +There are total of 7 interrupts in this mailbox. Each used for an individual +door bell (or mailbox channel). + +Required properties: +- compatible: Should be as "apm, xgene-slimpro-mbox". + +- reg: Contain the mailbox register address range. + +- interrupts: 7 interrupts must start from 0 to 6, interrupt 0 define the + the interrupt for mailbox channel 0 and interrupt 1 for + mailbox channel 1 and so likewise for the reminder. + +- #mbox-cells: only one to specify the mailbox channel number. + +Example: + +Mailbox Node: + slimpro-mbox: slimpro-mbox@10540000 { + compatible = "apm,xgene-slimpro-mbox"; + reg = <0x0 0x10540000 0x0 0xa000>; + #mbox-cells = <1>; + interrupts = <0x0 0x0 0x4>, + <0x0 0x1 0x4>, + <0x0 0x2 0x4>, + <0x0 0x3 0x4>, + <0x0 0x4 0x4>, + <0x0 0x5 0x4>, + <0x0 0x6 0x4>, + }; -- 1.9.1 ^ permalink raw reply related [flat|nested] 95+ messages in thread
* [PATCH v3 2/3] Documentation: mailbox: Add APM X-Gene SLIMpro mailbox dts documentation 2015-11-09 18:05 ` Duc Dang @ 2015-11-10 14:15 ` Rob Herring -1 siblings, 0 replies; 95+ messages in thread From: Rob Herring @ 2015-11-10 14:15 UTC (permalink / raw) To: linux-arm-kernel On Mon, Nov 09, 2015 at 10:05:44AM -0800, Duc Dang wrote: > This adds the APM X-Gene SLIMpro mailbox device tree > node documentation. > > [dhdang: rebase over 4.3-rc5] > Signed-off-by: Feng Kan <fkan@apm.com> > Signed-off-by: Duc Dang <dhdang@apm.com> > --- > .../bindings/mailbox/xgene-slimpro-mailbox.txt | 34 ++++++++++++++++++++++ > 1 file changed, 34 insertions(+) > create mode 100644 Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt > > diff --git a/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt b/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt > new file mode 100644 > index 0000000..d02a3d8 > --- /dev/null > +++ b/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt > @@ -0,0 +1,34 @@ > +The APM X-Gene SLIMpro mailbox is used to communicate messages between > +the ARM64 processors and the Cortex M3 (dubbed SLIMpro). It uses a simple > +interrupt based door bell mechanism and can exchange simple messages using the > +internal registers. > + > +There are total of 7 interrupts in this mailbox. Each used for an individual > +door bell (or mailbox channel). > + > +Required properties: > +- compatible: Should be as "apm, xgene-slimpro-mbox". ^ remove the space > + > +- reg: Contain the mailbox register address range. s/Contain/Contains/ > + > +- interrupts: 7 interrupts must start from 0 to 6, interrupt 0 define the > + the interrupt for mailbox channel 0 and interrupt 1 for > + mailbox channel 1 and so likewise for the reminder. s/start/be/ > + > +- #mbox-cells: only one to specify the mailbox channel number. > + > +Example: > + > +Mailbox Node: > + slimpro-mbox: slimpro-mbox at 10540000 { > + compatible = "apm,xgene-slimpro-mbox"; > + reg = <0x0 0x10540000 0x0 0xa000>; > + #mbox-cells = <1>; > + interrupts = <0x0 0x0 0x4>, > + <0x0 0x1 0x4>, > + <0x0 0x2 0x4>, > + <0x0 0x3 0x4>, > + <0x0 0x4 0x4>, > + <0x0 0x5 0x4>, > + <0x0 0x6 0x4>, > + }; > -- > 1.9.1 > > -- > To unsubscribe from this list: send the line "unsubscribe devicetree" in > the body of a message to majordomo at vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html ^ permalink raw reply [flat|nested] 95+ messages in thread
* Re: [PATCH v3 2/3] Documentation: mailbox: Add APM X-Gene SLIMpro mailbox dts documentation @ 2015-11-10 14:15 ` Rob Herring 0 siblings, 0 replies; 95+ messages in thread From: Rob Herring @ 2015-11-10 14:15 UTC (permalink / raw) To: Duc Dang Cc: Jassi Brar, Paul Bolle, devicetree, linux-arm-kernel, linux-kernel, patches, Feng Kan On Mon, Nov 09, 2015 at 10:05:44AM -0800, Duc Dang wrote: > This adds the APM X-Gene SLIMpro mailbox device tree > node documentation. > > [dhdang: rebase over 4.3-rc5] > Signed-off-by: Feng Kan <fkan@apm.com> > Signed-off-by: Duc Dang <dhdang@apm.com> > --- > .../bindings/mailbox/xgene-slimpro-mailbox.txt | 34 ++++++++++++++++++++++ > 1 file changed, 34 insertions(+) > create mode 100644 Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt > > diff --git a/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt b/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt > new file mode 100644 > index 0000000..d02a3d8 > --- /dev/null > +++ b/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt > @@ -0,0 +1,34 @@ > +The APM X-Gene SLIMpro mailbox is used to communicate messages between > +the ARM64 processors and the Cortex M3 (dubbed SLIMpro). It uses a simple > +interrupt based door bell mechanism and can exchange simple messages using the > +internal registers. > + > +There are total of 7 interrupts in this mailbox. Each used for an individual > +door bell (or mailbox channel). > + > +Required properties: > +- compatible: Should be as "apm, xgene-slimpro-mbox". ^ remove the space > + > +- reg: Contain the mailbox register address range. s/Contain/Contains/ > + > +- interrupts: 7 interrupts must start from 0 to 6, interrupt 0 define the > + the interrupt for mailbox channel 0 and interrupt 1 for > + mailbox channel 1 and so likewise for the reminder. s/start/be/ > + > +- #mbox-cells: only one to specify the mailbox channel number. > + > +Example: > + > +Mailbox Node: > + slimpro-mbox: slimpro-mbox@10540000 { > + compatible = "apm,xgene-slimpro-mbox"; > + reg = <0x0 0x10540000 0x0 0xa000>; > + #mbox-cells = <1>; > + interrupts = <0x0 0x0 0x4>, > + <0x0 0x1 0x4>, > + <0x0 0x2 0x4>, > + <0x0 0x3 0x4>, > + <0x0 0x4 0x4>, > + <0x0 0x5 0x4>, > + <0x0 0x6 0x4>, > + }; > -- > 1.9.1 > > -- > To unsubscribe from this list: send the line "unsubscribe devicetree" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html ^ permalink raw reply [flat|nested] 95+ messages in thread
* [PATCH v3 2/3] Documentation: mailbox: Add APM X-Gene SLIMpro mailbox dts documentation 2015-11-10 14:15 ` Rob Herring @ 2015-11-10 18:42 ` Duc Dang -1 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2015-11-10 18:42 UTC (permalink / raw) To: linux-arm-kernel On Tue, Nov 10, 2015 at 6:15 AM, Rob Herring <robh@kernel.org> wrote: > On Mon, Nov 09, 2015 at 10:05:44AM -0800, Duc Dang wrote: >> This adds the APM X-Gene SLIMpro mailbox device tree >> node documentation. >> >> [dhdang: rebase over 4.3-rc5] >> Signed-off-by: Feng Kan <fkan@apm.com> >> Signed-off-by: Duc Dang <dhdang@apm.com> >> --- >> .../bindings/mailbox/xgene-slimpro-mailbox.txt | 34 ++++++++++++++++++++++ >> 1 file changed, 34 insertions(+) >> create mode 100644 Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt >> >> diff --git a/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt b/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt >> new file mode 100644 >> index 0000000..d02a3d8 >> --- /dev/null >> +++ b/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt >> @@ -0,0 +1,34 @@ >> +The APM X-Gene SLIMpro mailbox is used to communicate messages between >> +the ARM64 processors and the Cortex M3 (dubbed SLIMpro). It uses a simple >> +interrupt based door bell mechanism and can exchange simple messages using the >> +internal registers. >> + >> +There are total of 7 interrupts in this mailbox. Each used for an individual >> +door bell (or mailbox channel). >> + >> +Required properties: >> +- compatible: Should be as "apm, xgene-slimpro-mbox". > ^ > remove the space I will fix in next version of the patch. > >> + >> +- reg: Contain the mailbox register address range. > > s/Contain/Contains/ Will change. > >> + >> +- interrupts: 7 interrupts must start from 0 to 6, interrupt 0 define the >> + the interrupt for mailbox channel 0 and interrupt 1 for >> + mailbox channel 1 and so likewise for the reminder. > > s/start/be/ Will change. > >> + >> +- #mbox-cells: only one to specify the mailbox channel number. >> + >> +Example: >> + >> +Mailbox Node: >> + slimpro-mbox: slimpro-mbox at 10540000 { >> + compatible = "apm,xgene-slimpro-mbox"; >> + reg = <0x0 0x10540000 0x0 0xa000>; >> + #mbox-cells = <1>; >> + interrupts = <0x0 0x0 0x4>, >> + <0x0 0x1 0x4>, >> + <0x0 0x2 0x4>, >> + <0x0 0x3 0x4>, >> + <0x0 0x4 0x4>, >> + <0x0 0x5 0x4>, >> + <0x0 0x6 0x4>, >> + }; >> -- >> 1.9.1 >> >> -- >> To unsubscribe from this list: send the line "unsubscribe devicetree" in >> the body of a message to majordomo at vger.kernel.org >> More majordomo info at http://vger.kernel.org/majordomo-info.html Regards, Duc Dang. ^ permalink raw reply [flat|nested] 95+ messages in thread
* Re: [PATCH v3 2/3] Documentation: mailbox: Add APM X-Gene SLIMpro mailbox dts documentation @ 2015-11-10 18:42 ` Duc Dang 0 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2015-11-10 18:42 UTC (permalink / raw) To: Rob Herring Cc: Jassi Brar, Paul Bolle, devicetree, linux-arm, Linux Kernel Mailing List, patches, Feng Kan On Tue, Nov 10, 2015 at 6:15 AM, Rob Herring <robh@kernel.org> wrote: > On Mon, Nov 09, 2015 at 10:05:44AM -0800, Duc Dang wrote: >> This adds the APM X-Gene SLIMpro mailbox device tree >> node documentation. >> >> [dhdang: rebase over 4.3-rc5] >> Signed-off-by: Feng Kan <fkan@apm.com> >> Signed-off-by: Duc Dang <dhdang@apm.com> >> --- >> .../bindings/mailbox/xgene-slimpro-mailbox.txt | 34 ++++++++++++++++++++++ >> 1 file changed, 34 insertions(+) >> create mode 100644 Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt >> >> diff --git a/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt b/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt >> new file mode 100644 >> index 0000000..d02a3d8 >> --- /dev/null >> +++ b/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt >> @@ -0,0 +1,34 @@ >> +The APM X-Gene SLIMpro mailbox is used to communicate messages between >> +the ARM64 processors and the Cortex M3 (dubbed SLIMpro). It uses a simple >> +interrupt based door bell mechanism and can exchange simple messages using the >> +internal registers. >> + >> +There are total of 7 interrupts in this mailbox. Each used for an individual >> +door bell (or mailbox channel). >> + >> +Required properties: >> +- compatible: Should be as "apm, xgene-slimpro-mbox". > ^ > remove the space I will fix in next version of the patch. > >> + >> +- reg: Contain the mailbox register address range. > > s/Contain/Contains/ Will change. > >> + >> +- interrupts: 7 interrupts must start from 0 to 6, interrupt 0 define the >> + the interrupt for mailbox channel 0 and interrupt 1 for >> + mailbox channel 1 and so likewise for the reminder. > > s/start/be/ Will change. > >> + >> +- #mbox-cells: only one to specify the mailbox channel number. >> + >> +Example: >> + >> +Mailbox Node: >> + slimpro-mbox: slimpro-mbox@10540000 { >> + compatible = "apm,xgene-slimpro-mbox"; >> + reg = <0x0 0x10540000 0x0 0xa000>; >> + #mbox-cells = <1>; >> + interrupts = <0x0 0x0 0x4>, >> + <0x0 0x1 0x4>, >> + <0x0 0x2 0x4>, >> + <0x0 0x3 0x4>, >> + <0x0 0x4 0x4>, >> + <0x0 0x5 0x4>, >> + <0x0 0x6 0x4>, >> + }; >> -- >> 1.9.1 >> >> -- >> To unsubscribe from this list: send the line "unsubscribe devicetree" in >> the body of a message to majordomo@vger.kernel.org >> More majordomo info at http://vger.kernel.org/majordomo-info.html Regards, Duc Dang. ^ permalink raw reply [flat|nested] 95+ messages in thread
* [PATCH v3 2/3] Documentation: mailbox: Add APM X-Gene SLIMpro mailbox dts documentation 2015-11-10 14:15 ` Rob Herring @ 2016-01-16 2:41 ` Duc Dang -1 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2016-01-16 2:41 UTC (permalink / raw) To: linux-arm-kernel On Tue, Nov 10, 2015 at 6:15 AM, Rob Herring <robh@kernel.org> wrote: > > On Mon, Nov 09, 2015 at 10:05:44AM -0800, Duc Dang wrote: > > This adds the APM X-Gene SLIMpro mailbox device tree > > node documentation. > > > > [dhdang: rebase over 4.3-rc5] > > Signed-off-by: Feng Kan <fkan@apm.com> > > Signed-off-by: Duc Dang <dhdang@apm.com> > > --- > > .../bindings/mailbox/xgene-slimpro-mailbox.txt | 34 ++++++++++++++++++++++ > > 1 file changed, 34 insertions(+) > > create mode 100644 Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt > > > > diff --git a/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt b/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt > > new file mode 100644 > > index 0000000..d02a3d8 > > --- /dev/null > > +++ b/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt > > @@ -0,0 +1,34 @@ > > +The APM X-Gene SLIMpro mailbox is used to communicate messages between > > +the ARM64 processors and the Cortex M3 (dubbed SLIMpro). It uses a simple > > +interrupt based door bell mechanism and can exchange simple messages using the > > +internal registers. > > + > > +There are total of 7 interrupts in this mailbox. Each used for an individual > > +door bell (or mailbox channel). > > + > > +Required properties: > > +- compatible: Should be as "apm, xgene-slimpro-mbox". > ^ > remove the space > > > + > > +- reg: Contain the mailbox register address range. > > s/Contain/Contains/ > > > + > > +- interrupts: 7 interrupts must start from 0 to 6, interrupt 0 define the > > + the interrupt for mailbox channel 0 and interrupt 1 for > > + mailbox channel 1 and so likewise for the reminder. > > s/start/be/ Thanks, Rob. I will post an updated version shortly. Regards, Duc Dang. > > > + > > +- #mbox-cells: only one to specify the mailbox channel number. > > + > > +Example: > > + > > +Mailbox Node: > > + slimpro-mbox: slimpro-mbox at 10540000 { > > + compatible = "apm,xgene-slimpro-mbox"; > > + reg = <0x0 0x10540000 0x0 0xa000>; > > + #mbox-cells = <1>; > > + interrupts = <0x0 0x0 0x4>, > > + <0x0 0x1 0x4>, > > + <0x0 0x2 0x4>, > > + <0x0 0x3 0x4>, > > + <0x0 0x4 0x4>, > > + <0x0 0x5 0x4>, > > + <0x0 0x6 0x4>, > > + }; > > -- > > 1.9.1 > > > > -- > > To unsubscribe from this list: send the line "unsubscribe devicetree" in > > the body of a message to majordomo at vger.kernel.org > > More majordomo info at http://vger.kernel.org/majordomo-info.html ^ permalink raw reply [flat|nested] 95+ messages in thread
* Re: [PATCH v3 2/3] Documentation: mailbox: Add APM X-Gene SLIMpro mailbox dts documentation @ 2016-01-16 2:41 ` Duc Dang 0 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2016-01-16 2:41 UTC (permalink / raw) To: Rob Herring Cc: Jassi Brar, Paul Bolle, Devicetree List, linux-arm, Linux Kernel Mailing List, patches, Feng Kan On Tue, Nov 10, 2015 at 6:15 AM, Rob Herring <robh@kernel.org> wrote: > > On Mon, Nov 09, 2015 at 10:05:44AM -0800, Duc Dang wrote: > > This adds the APM X-Gene SLIMpro mailbox device tree > > node documentation. > > > > [dhdang: rebase over 4.3-rc5] > > Signed-off-by: Feng Kan <fkan@apm.com> > > Signed-off-by: Duc Dang <dhdang@apm.com> > > --- > > .../bindings/mailbox/xgene-slimpro-mailbox.txt | 34 ++++++++++++++++++++++ > > 1 file changed, 34 insertions(+) > > create mode 100644 Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt > > > > diff --git a/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt b/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt > > new file mode 100644 > > index 0000000..d02a3d8 > > --- /dev/null > > +++ b/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt > > @@ -0,0 +1,34 @@ > > +The APM X-Gene SLIMpro mailbox is used to communicate messages between > > +the ARM64 processors and the Cortex M3 (dubbed SLIMpro). It uses a simple > > +interrupt based door bell mechanism and can exchange simple messages using the > > +internal registers. > > + > > +There are total of 7 interrupts in this mailbox. Each used for an individual > > +door bell (or mailbox channel). > > + > > +Required properties: > > +- compatible: Should be as "apm, xgene-slimpro-mbox". > ^ > remove the space > > > + > > +- reg: Contain the mailbox register address range. > > s/Contain/Contains/ > > > + > > +- interrupts: 7 interrupts must start from 0 to 6, interrupt 0 define the > > + the interrupt for mailbox channel 0 and interrupt 1 for > > + mailbox channel 1 and so likewise for the reminder. > > s/start/be/ Thanks, Rob. I will post an updated version shortly. Regards, Duc Dang. > > > + > > +- #mbox-cells: only one to specify the mailbox channel number. > > + > > +Example: > > + > > +Mailbox Node: > > + slimpro-mbox: slimpro-mbox@10540000 { > > + compatible = "apm,xgene-slimpro-mbox"; > > + reg = <0x0 0x10540000 0x0 0xa000>; > > + #mbox-cells = <1>; > > + interrupts = <0x0 0x0 0x4>, > > + <0x0 0x1 0x4>, > > + <0x0 0x2 0x4>, > > + <0x0 0x3 0x4>, > > + <0x0 0x4 0x4>, > > + <0x0 0x5 0x4>, > > + <0x0 0x6 0x4>, > > + }; > > -- > > 1.9.1 > > > > -- > > To unsubscribe from this list: send the line "unsubscribe devicetree" in > > the body of a message to majordomo@vger.kernel.org > > More majordomo info at http://vger.kernel.org/majordomo-info.html ^ permalink raw reply [flat|nested] 95+ messages in thread
* [PATCH v3 3/3] arm64: dts: mailbox device tree node for APM X-Gene platform. 2015-11-09 18:05 ` Duc Dang @ 2015-11-09 18:05 ` Duc Dang -1 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2015-11-09 18:05 UTC (permalink / raw) To: linux-arm-kernel Mailbox device tree node for APM X-Gene platform. [dhdang: rebase over 4.3-rc5] Signed-off-by: Feng Kan <fkan@apm.com> Signed-off-by: Duc Dang <dhdang@apm.com> --- arch/arm64/boot/dts/apm/apm-storm.dtsi | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/arch/arm64/boot/dts/apm/apm-storm.dtsi b/arch/arm64/boot/dts/apm/apm-storm.dtsi index d831bc2..b36e555 100644 --- a/arch/arm64/boot/dts/apm/apm-storm.dtsi +++ b/arch/arm64/boot/dts/apm/apm-storm.dtsi @@ -604,6 +604,20 @@ msi-parent = <&msi>; }; + mailbox: slimpro-mbox at 10540000 { + compatible = "apm,xgene-slimpro-mbox"; + reg = <0x0 0x10540000 0x0 0xa000>; + #mbox-cells = <1>; + interrupts = <0x0 0x0 0x4>, + <0x0 0x1 0x4>, + <0x0 0x2 0x4>, + <0x0 0x3 0x4>, + <0x0 0x4 0x4>, + <0x0 0x5 0x4>, + <0x0 0x6 0x4>, + <0x0 0x7 0x4>; + }; + serial0: serial at 1c020000 { status = "disabled"; device_type = "serial"; -- 1.9.1 ^ permalink raw reply related [flat|nested] 95+ messages in thread
* [PATCH v3 3/3] arm64: dts: mailbox device tree node for APM X-Gene platform. @ 2015-11-09 18:05 ` Duc Dang 0 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2015-11-09 18:05 UTC (permalink / raw) To: Jassi Brar, Paul Bolle Cc: devicetree, linux-arm-kernel, linux-kernel, patches, Duc Dang, Feng Kan Mailbox device tree node for APM X-Gene platform. [dhdang: rebase over 4.3-rc5] Signed-off-by: Feng Kan <fkan@apm.com> Signed-off-by: Duc Dang <dhdang@apm.com> --- arch/arm64/boot/dts/apm/apm-storm.dtsi | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/arch/arm64/boot/dts/apm/apm-storm.dtsi b/arch/arm64/boot/dts/apm/apm-storm.dtsi index d831bc2..b36e555 100644 --- a/arch/arm64/boot/dts/apm/apm-storm.dtsi +++ b/arch/arm64/boot/dts/apm/apm-storm.dtsi @@ -604,6 +604,20 @@ msi-parent = <&msi>; }; + mailbox: slimpro-mbox@10540000 { + compatible = "apm,xgene-slimpro-mbox"; + reg = <0x0 0x10540000 0x0 0xa000>; + #mbox-cells = <1>; + interrupts = <0x0 0x0 0x4>, + <0x0 0x1 0x4>, + <0x0 0x2 0x4>, + <0x0 0x3 0x4>, + <0x0 0x4 0x4>, + <0x0 0x5 0x4>, + <0x0 0x6 0x4>, + <0x0 0x7 0x4>; + }; + serial0: serial@1c020000 { status = "disabled"; device_type = "serial"; -- 1.9.1 ^ permalink raw reply related [flat|nested] 95+ messages in thread
* [PATCH v3 0/3] mailbox: Add APM X-Gene platform mailbox driver @ 2015-11-16 19:22 ` Duc Dang 0 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2015-11-16 19:22 UTC (permalink / raw) To: linux-arm-kernel On Mon, Nov 9, 2015 at 10:05 AM, Duc Dang <dhdang@apm.com> wrote: > APM X-Gene SoC has a mailbox controller that provides > communication mechanism for X-Gene Arm64 cores to communicate > with X-Gene SoC's Cortex M3 (SLIMpro) processor. > > X-Gene mailbox controller provides 8 mailbox channels, with > each channel has a dedicated interrupt line. > > Changes since v2: > - Rebase Feng's patch set over v4.3-rc5 > - Remove uneccessary 'inline' in function definition > - Use module_platform_driver instead of subsys_initcall > - Minor coding stype clean up > > Changes since v1: > - Add ACPI support > - Use defines for reg offset > > .../bindings/mailbox/xgene-slimpro-mailbox.txt | 34 +++ > arch/arm64/boot/dts/apm/apm-storm.dtsi | 14 ++ > drivers/mailbox/Kconfig | 9 + > drivers/mailbox/Makefile | 2 + > drivers/mailbox/mailbox-xgene-slimpro.c | 264 +++++++++++++++++++++ > 5 files changed, 323 insertions(+) > create mode 100644 Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt > create mode 100644 drivers/mailbox/mailbox-xgene-slimpro.c > Hi Jassi, Paul, Do you have any comment on this patch set? > -- > 1.9.1 > Regards, Duc dang. ^ permalink raw reply [flat|nested] 95+ messages in thread
* Re: [PATCH v3 0/3] mailbox: Add APM X-Gene platform mailbox driver @ 2015-11-16 19:22 ` Duc Dang 0 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2015-11-16 19:22 UTC (permalink / raw) To: Jassi Brar, Paul Bolle Cc: devicetree, linux-arm, Linux Kernel Mailing List, patches, Duc Dang On Mon, Nov 9, 2015 at 10:05 AM, Duc Dang <dhdang@apm.com> wrote: > APM X-Gene SoC has a mailbox controller that provides > communication mechanism for X-Gene Arm64 cores to communicate > with X-Gene SoC's Cortex M3 (SLIMpro) processor. > > X-Gene mailbox controller provides 8 mailbox channels, with > each channel has a dedicated interrupt line. > > Changes since v2: > - Rebase Feng's patch set over v4.3-rc5 > - Remove uneccessary 'inline' in function definition > - Use module_platform_driver instead of subsys_initcall > - Minor coding stype clean up > > Changes since v1: > - Add ACPI support > - Use defines for reg offset > > .../bindings/mailbox/xgene-slimpro-mailbox.txt | 34 +++ > arch/arm64/boot/dts/apm/apm-storm.dtsi | 14 ++ > drivers/mailbox/Kconfig | 9 + > drivers/mailbox/Makefile | 2 + > drivers/mailbox/mailbox-xgene-slimpro.c | 264 +++++++++++++++++++++ > 5 files changed, 323 insertions(+) > create mode 100644 Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt > create mode 100644 drivers/mailbox/mailbox-xgene-slimpro.c > Hi Jassi, Paul, Do you have any comment on this patch set? > -- > 1.9.1 > Regards, Duc dang. ^ permalink raw reply [flat|nested] 95+ messages in thread
* Re: [PATCH v3 0/3] mailbox: Add APM X-Gene platform mailbox driver @ 2015-11-16 19:22 ` Duc Dang 0 siblings, 0 replies; 95+ messages in thread From: Duc Dang @ 2015-11-16 19:22 UTC (permalink / raw) To: Jassi Brar, Paul Bolle Cc: devicetree-u79uwXL29TY76Z2rM5mHXA, linux-arm, Linux Kernel Mailing List, patches, Duc Dang On Mon, Nov 9, 2015 at 10:05 AM, Duc Dang <dhdang-qTEPVZfXA3Y@public.gmane.org> wrote: > APM X-Gene SoC has a mailbox controller that provides > communication mechanism for X-Gene Arm64 cores to communicate > with X-Gene SoC's Cortex M3 (SLIMpro) processor. > > X-Gene mailbox controller provides 8 mailbox channels, with > each channel has a dedicated interrupt line. > > Changes since v2: > - Rebase Feng's patch set over v4.3-rc5 > - Remove uneccessary 'inline' in function definition > - Use module_platform_driver instead of subsys_initcall > - Minor coding stype clean up > > Changes since v1: > - Add ACPI support > - Use defines for reg offset > > .../bindings/mailbox/xgene-slimpro-mailbox.txt | 34 +++ > arch/arm64/boot/dts/apm/apm-storm.dtsi | 14 ++ > drivers/mailbox/Kconfig | 9 + > drivers/mailbox/Makefile | 2 + > drivers/mailbox/mailbox-xgene-slimpro.c | 264 +++++++++++++++++++++ > 5 files changed, 323 insertions(+) > create mode 100644 Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt > create mode 100644 drivers/mailbox/mailbox-xgene-slimpro.c > Hi Jassi, Paul, Do you have any comment on this patch set? > -- > 1.9.1 > Regards, Duc dang. -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html ^ permalink raw reply [flat|nested] 95+ messages in thread
* [PATCH v3 0/3] mailbox: Add APM X-Gene platform mailbox driver @ 2015-11-20 10:39 ` Paul Bolle 0 siblings, 0 replies; 95+ messages in thread From: Paul Bolle @ 2015-11-20 10:39 UTC (permalink / raw) To: linux-arm-kernel Hi Duc, On ma, 2015-11-16 at 11:22 -0800, Duc Dang wrote: > Hi Jassi, Paul, > > Do you have any comment on this patch set? Are you perhaps confusing me with another Paul? (I think I made a minor comment or two on this series about half a year ago. But I'm not the maintainer here and it's the maintainers verdict that you're probably interested in mostly. So it's not clear to me why you specifically ask for my comment.) Thanks, Paul Bolle ^ permalink raw reply [flat|nested] 95+ messages in thread
* Re: [PATCH v3 0/3] mailbox: Add APM X-Gene platform mailbox driver @ 2015-11-20 10:39 ` Paul Bolle 0 siblings, 0 replies; 95+ messages in thread From: Paul Bolle @ 2015-11-20 10:39 UTC (permalink / raw) To: Duc Dang; +Cc: Jassi Brar, devicetree, linux-arm-kernel, linux-kernel, patches Hi Duc, On ma, 2015-11-16 at 11:22 -0800, Duc Dang wrote: > Hi Jassi, Paul, > > Do you have any comment on this patch set? Are you perhaps confusing me with another Paul? (I think I made a minor comment or two on this series about half a year ago. But I'm not the maintainer here and it's the maintainers verdict that you're probably interested in mostly. So it's not clear to me why you specifically ask for my comment.) Thanks, Paul Bolle ^ permalink raw reply [flat|nested] 95+ messages in thread
* Re: [PATCH v3 0/3] mailbox: Add APM X-Gene platform mailbox driver @ 2015-11-20 10:39 ` Paul Bolle 0 siblings, 0 replies; 95+ messages in thread From: Paul Bolle @ 2015-11-20 10:39 UTC (permalink / raw) To: Duc Dang Cc: Jassi Brar, devicetree-u79uwXL29TY76Z2rM5mHXA, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r, linux-kernel-u79uwXL29TY76Z2rM5mHXA, patches-qTEPVZfXA3Y Hi Duc, On ma, 2015-11-16 at 11:22 -0800, Duc Dang wrote: > Hi Jassi, Paul, > > Do you have any comment on this patch set? Are you perhaps confusing me with another Paul? (I think I made a minor comment or two on this series about half a year ago. But I'm not the maintainer here and it's the maintainers verdict that you're probably interested in mostly. So it's not clear to me why you specifically ask for my comment.) Thanks, Paul Bolle -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html ^ permalink raw reply [flat|nested] 95+ messages in thread
* [PATCH V2 2/4] mailbox: xgene: add ACPI support for X-Gene mailbox driver 2015-04-22 22:18 ` Feng Kan @ 2015-04-22 22:18 ` Feng Kan -1 siblings, 0 replies; 95+ messages in thread From: Feng Kan @ 2015-04-22 22:18 UTC (permalink / raw) To: patches, jassisinghbrar, devicetree, linux-arm-kernel, linux-kernel, linux-acpi Cc: Feng Kan Add ACPI support for APM X-Gene mailbox driver. Signed-off-by: Feng Kan <fkan@apm.com> --- drivers/mailbox/mailbox-xgene-slimpro.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/mailbox/mailbox-xgene-slimpro.c b/drivers/mailbox/mailbox-xgene-slimpro.c index 49370e5..890f95b 100644 --- a/drivers/mailbox/mailbox-xgene-slimpro.c +++ b/drivers/mailbox/mailbox-xgene-slimpro.c @@ -18,6 +18,7 @@ * along with this program; if not, see <http://www.gnu.org/licenses/>. * */ +#include <linux/acpi.h> #include <linux/delay.h> #include <linux/interrupt.h> #include <linux/io.h> @@ -240,6 +241,14 @@ static const struct of_device_id slimpro_of_match[] = { }; MODULE_DEVICE_TABLE(of, slimpro_of_match); +#ifdef CONFIG_ACPI +static const struct acpi_device_id slimpro_acpi_ids[] = { + {"APMC0D01", 0}, + {} +}; +MODULE_DEVICE_TABLE(acpi, slimpro_acpi_ids); +#endif + static struct platform_driver slimpro_mbox_driver = { .probe = slimpro_mbox_probe, .remove = slimpro_mbox_remove, @@ -247,6 +256,7 @@ static struct platform_driver slimpro_mbox_driver = { .name = "xgene-slimpro-mbox", .owner = THIS_MODULE, .of_match_table = of_match_ptr(slimpro_of_match), + .acpi_match_table = ACPI_PTR(slimpro_acpi_ids) }, }; -- 1.9.1 ^ permalink raw reply related [flat|nested] 95+ messages in thread
* [PATCH V2 2/4] mailbox: xgene: add ACPI support for X-Gene mailbox driver @ 2015-04-22 22:18 ` Feng Kan 0 siblings, 0 replies; 95+ messages in thread From: Feng Kan @ 2015-04-22 22:18 UTC (permalink / raw) To: linux-arm-kernel Add ACPI support for APM X-Gene mailbox driver. Signed-off-by: Feng Kan <fkan@apm.com> --- drivers/mailbox/mailbox-xgene-slimpro.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/mailbox/mailbox-xgene-slimpro.c b/drivers/mailbox/mailbox-xgene-slimpro.c index 49370e5..890f95b 100644 --- a/drivers/mailbox/mailbox-xgene-slimpro.c +++ b/drivers/mailbox/mailbox-xgene-slimpro.c @@ -18,6 +18,7 @@ * along with this program; if not, see <http://www.gnu.org/licenses/>. * */ +#include <linux/acpi.h> #include <linux/delay.h> #include <linux/interrupt.h> #include <linux/io.h> @@ -240,6 +241,14 @@ static const struct of_device_id slimpro_of_match[] = { }; MODULE_DEVICE_TABLE(of, slimpro_of_match); +#ifdef CONFIG_ACPI +static const struct acpi_device_id slimpro_acpi_ids[] = { + {"APMC0D01", 0}, + {} +}; +MODULE_DEVICE_TABLE(acpi, slimpro_acpi_ids); +#endif + static struct platform_driver slimpro_mbox_driver = { .probe = slimpro_mbox_probe, .remove = slimpro_mbox_remove, @@ -247,6 +256,7 @@ static struct platform_driver slimpro_mbox_driver = { .name = "xgene-slimpro-mbox", .owner = THIS_MODULE, .of_match_table = of_match_ptr(slimpro_of_match), + .acpi_match_table = ACPI_PTR(slimpro_acpi_ids) }, }; -- 1.9.1 ^ permalink raw reply related [flat|nested] 95+ messages in thread
* [PATCH V2 3/4] Documentation: mailbox: Add APM X-Gene SLIMpro mailbox dts documentation 2015-04-22 22:18 ` Feng Kan @ 2015-04-22 22:18 ` Feng Kan -1 siblings, 0 replies; 95+ messages in thread From: Feng Kan @ 2015-04-22 22:18 UTC (permalink / raw) To: patches, jassisinghbrar, devicetree, linux-arm-kernel, linux-kernel, linux-acpi Cc: Feng Kan This adds the APM X-Gene SLIMpro mailbox device tree node documentation. Signed-off-by: Feng Kan <fkan@apm.com> --- .../bindings/mailbox/xgene-slimpro-mailbox.txt | 34 ++++++++++++++++++++++ 1 file changed, 34 insertions(+) create mode 100644 Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt diff --git a/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt b/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt new file mode 100644 index 0000000..d02a3d8 --- /dev/null +++ b/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt @@ -0,0 +1,34 @@ +The APM X-Gene SLIMpro mailbox is used to communicate messages between +the ARM64 processors and the Cortex M3 (dubbed SLIMpro). It uses a simple +interrupt based door bell mechanism and can exchange simple messages using the +internal registers. + +There are total of 7 interrupts in this mailbox. Each used for an individual +door bell (or mailbox channel). + +Required properties: +- compatible: Should be as "apm, xgene-slimpro-mbox". + +- reg: Contain the mailbox register address range. + +- interrupts: 7 interrupts must start from 0 to 6, interrupt 0 define the + the interrupt for mailbox channel 0 and interrupt 1 for + mailbox channel 1 and so likewise for the reminder. + +- #mbox-cells: only one to specify the mailbox channel number. + +Example: + +Mailbox Node: + slimpro-mbox: slimpro-mbox@10540000 { + compatible = "apm,xgene-slimpro-mbox"; + reg = <0x0 0x10540000 0x0 0xa000>; + #mbox-cells = <1>; + interrupts = <0x0 0x0 0x4>, + <0x0 0x1 0x4>, + <0x0 0x2 0x4>, + <0x0 0x3 0x4>, + <0x0 0x4 0x4>, + <0x0 0x5 0x4>, + <0x0 0x6 0x4>, + }; -- 1.9.1 ^ permalink raw reply related [flat|nested] 95+ messages in thread
* [PATCH V2 3/4] Documentation: mailbox: Add APM X-Gene SLIMpro mailbox dts documentation @ 2015-04-22 22:18 ` Feng Kan 0 siblings, 0 replies; 95+ messages in thread From: Feng Kan @ 2015-04-22 22:18 UTC (permalink / raw) To: linux-arm-kernel This adds the APM X-Gene SLIMpro mailbox device tree node documentation. Signed-off-by: Feng Kan <fkan@apm.com> --- .../bindings/mailbox/xgene-slimpro-mailbox.txt | 34 ++++++++++++++++++++++ 1 file changed, 34 insertions(+) create mode 100644 Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt diff --git a/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt b/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt new file mode 100644 index 0000000..d02a3d8 --- /dev/null +++ b/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt @@ -0,0 +1,34 @@ +The APM X-Gene SLIMpro mailbox is used to communicate messages between +the ARM64 processors and the Cortex M3 (dubbed SLIMpro). It uses a simple +interrupt based door bell mechanism and can exchange simple messages using the +internal registers. + +There are total of 7 interrupts in this mailbox. Each used for an individual +door bell (or mailbox channel). + +Required properties: +- compatible: Should be as "apm, xgene-slimpro-mbox". + +- reg: Contain the mailbox register address range. + +- interrupts: 7 interrupts must start from 0 to 6, interrupt 0 define the + the interrupt for mailbox channel 0 and interrupt 1 for + mailbox channel 1 and so likewise for the reminder. + +- #mbox-cells: only one to specify the mailbox channel number. + +Example: + +Mailbox Node: + slimpro-mbox: slimpro-mbox at 10540000 { + compatible = "apm,xgene-slimpro-mbox"; + reg = <0x0 0x10540000 0x0 0xa000>; + #mbox-cells = <1>; + interrupts = <0x0 0x0 0x4>, + <0x0 0x1 0x4>, + <0x0 0x2 0x4>, + <0x0 0x3 0x4>, + <0x0 0x4 0x4>, + <0x0 0x5 0x4>, + <0x0 0x6 0x4>, + }; -- 1.9.1 ^ permalink raw reply related [flat|nested] 95+ messages in thread
[parent not found: <1429741125-29156-1-git-send-email-fkan-qTEPVZfXA3Y@public.gmane.org>]
* [PATCH V2 4/4] arm64: dts: mailbox device tree node for APM X-Gene platform. 2015-04-22 22:18 ` Feng Kan (?) @ 2015-04-22 22:18 ` Feng Kan -1 siblings, 0 replies; 95+ messages in thread From: Feng Kan @ 2015-04-22 22:18 UTC (permalink / raw) To: patches-qTEPVZfXA3Y, jassisinghbrar-Re5JQEeQqe8AvxtiuMwx3w, devicetree-u79uwXL29TY76Z2rM5mHXA, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r, linux-kernel-u79uwXL29TY76Z2rM5mHXA, linux-acpi-u79uwXL29TY76Z2rM5mHXA Cc: Feng Kan Mailbox device tree node for APM X-Gene platform. Signed-off-by: Feng Kan <fkan-qTEPVZfXA3Y@public.gmane.org> --- arch/arm64/boot/dts/apm/apm-storm.dtsi | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/arch/arm64/boot/dts/apm/apm-storm.dtsi b/arch/arm64/boot/dts/apm/apm-storm.dtsi index c8d3e0e..92e7b6b 100644 --- a/arch/arm64/boot/dts/apm/apm-storm.dtsi +++ b/arch/arm64/boot/dts/apm/apm-storm.dtsi @@ -489,6 +489,20 @@ clocks = <&pcie4clk 0>; }; + mailbox: slimpro-mbox@10540000 { + compatible = "apm,xgene-slimpro-mbox"; + reg = <0x0 0x10540000 0x0 0xa000>; + #mbox-cells = <1>; + interrupts = <0x0 0x0 0x4>, + <0x0 0x1 0x4>, + <0x0 0x2 0x4>, + <0x0 0x3 0x4>, + <0x0 0x4 0x4>, + <0x0 0x5 0x4>, + <0x0 0x6 0x4>, + <0x0 0x7 0x4>; + }; + serial0: serial@1c020000 { status = "disabled"; device_type = "serial"; -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html ^ permalink raw reply related [flat|nested] 95+ messages in thread
* [PATCH V2 4/4] arm64: dts: mailbox device tree node for APM X-Gene platform. @ 2015-04-22 22:18 ` Feng Kan 0 siblings, 0 replies; 95+ messages in thread From: Feng Kan @ 2015-04-22 22:18 UTC (permalink / raw) To: patches, jassisinghbrar, devicetree, linux-arm-kernel, linux-kernel, linux-acpi Cc: Feng Kan Mailbox device tree node for APM X-Gene platform. Signed-off-by: Feng Kan <fkan@apm.com> --- arch/arm64/boot/dts/apm/apm-storm.dtsi | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/arch/arm64/boot/dts/apm/apm-storm.dtsi b/arch/arm64/boot/dts/apm/apm-storm.dtsi index c8d3e0e..92e7b6b 100644 --- a/arch/arm64/boot/dts/apm/apm-storm.dtsi +++ b/arch/arm64/boot/dts/apm/apm-storm.dtsi @@ -489,6 +489,20 @@ clocks = <&pcie4clk 0>; }; + mailbox: slimpro-mbox@10540000 { + compatible = "apm,xgene-slimpro-mbox"; + reg = <0x0 0x10540000 0x0 0xa000>; + #mbox-cells = <1>; + interrupts = <0x0 0x0 0x4>, + <0x0 0x1 0x4>, + <0x0 0x2 0x4>, + <0x0 0x3 0x4>, + <0x0 0x4 0x4>, + <0x0 0x5 0x4>, + <0x0 0x6 0x4>, + <0x0 0x7 0x4>; + }; + serial0: serial@1c020000 { status = "disabled"; device_type = "serial"; -- 1.9.1 ^ permalink raw reply related [flat|nested] 95+ messages in thread
* [PATCH V2 4/4] arm64: dts: mailbox device tree node for APM X-Gene platform. @ 2015-04-22 22:18 ` Feng Kan 0 siblings, 0 replies; 95+ messages in thread From: Feng Kan @ 2015-04-22 22:18 UTC (permalink / raw) To: linux-arm-kernel Mailbox device tree node for APM X-Gene platform. Signed-off-by: Feng Kan <fkan@apm.com> --- arch/arm64/boot/dts/apm/apm-storm.dtsi | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/arch/arm64/boot/dts/apm/apm-storm.dtsi b/arch/arm64/boot/dts/apm/apm-storm.dtsi index c8d3e0e..92e7b6b 100644 --- a/arch/arm64/boot/dts/apm/apm-storm.dtsi +++ b/arch/arm64/boot/dts/apm/apm-storm.dtsi @@ -489,6 +489,20 @@ clocks = <&pcie4clk 0>; }; + mailbox: slimpro-mbox at 10540000 { + compatible = "apm,xgene-slimpro-mbox"; + reg = <0x0 0x10540000 0x0 0xa000>; + #mbox-cells = <1>; + interrupts = <0x0 0x0 0x4>, + <0x0 0x1 0x4>, + <0x0 0x2 0x4>, + <0x0 0x3 0x4>, + <0x0 0x4 0x4>, + <0x0 0x5 0x4>, + <0x0 0x6 0x4>, + <0x0 0x7 0x4>; + }; + serial0: serial at 1c020000 { status = "disabled"; device_type = "serial"; -- 1.9.1 ^ permalink raw reply related [flat|nested] 95+ messages in thread
end of thread, other threads:[~2016-02-25 22:33 UTC | newest]
Thread overview: 95+ messages (download: mbox.gz follow: Atom feed
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2015-04-22 22:18 [PATCH V2 0/4] APM X-Gene Mailbox driver Feng Kan
2015-04-22 22:18 ` Feng Kan
2015-04-22 22:18 ` [PATCH V2 1/4] mailbox: add support for APM X-Gene platform mailbox driver Feng Kan
2015-04-22 22:18 ` Feng Kan
2015-04-24 8:25 ` Paul Bolle
2015-04-24 8:25 ` Paul Bolle
2015-11-09 18:05 ` [PATCH v3 0/3] mailbox: Add " Duc Dang
2015-11-09 18:05 ` Duc Dang
2015-11-09 18:05 ` [PATCH v3 1/3] mailbox: Add support for " Duc Dang
2015-11-09 18:05 ` Duc Dang
2015-11-20 11:47 ` Jassi Brar
2015-11-20 11:47 ` Jassi Brar
2015-12-07 9:29 ` Duc Dang
2015-12-07 9:29 ` Duc Dang
2016-01-16 2:57 ` [PATCH v4 0/3] mailbox: Add " Duc Dang
2016-01-16 2:57 ` Duc Dang
2016-01-16 2:57 ` [PATCH v4 1/3] mailbox: Add support for " Duc Dang
2016-01-16 2:57 ` Duc Dang
2016-01-16 2:57 ` Duc Dang
2016-01-16 12:31 ` kbuild test robot
2016-01-16 12:31 ` kbuild test robot
2016-01-16 12:31 ` kbuild test robot
2016-01-22 23:05 ` Duc Dang
2016-01-22 23:05 ` Duc Dang
2016-02-01 19:38 ` Duc Dang
2016-02-01 19:38 ` Duc Dang
2016-02-01 19:38 ` Duc Dang
2016-02-02 5:14 ` Jassi Brar
2016-02-02 5:14 ` Jassi Brar
2016-02-08 22:04 ` [PATCH v5 0/3] mailbox: Add " Duc Dang
2016-02-08 22:04 ` Duc Dang
2016-02-08 22:04 ` Duc Dang
2016-02-08 22:04 ` [PATCH v5 1/3] mailbox: Add support for " Duc Dang
2016-02-08 22:04 ` Duc Dang
2016-02-09 16:40 ` Mathieu Poirier
2016-02-09 16:40 ` Mathieu Poirier
2016-02-10 3:46 ` Duc Dang
2016-02-10 3:46 ` Duc Dang
2016-02-10 14:41 ` Mathieu Poirier
2016-02-10 14:41 ` Mathieu Poirier
2016-02-10 14:41 ` Mathieu Poirier
2016-02-13 3:25 ` Duc Dang
2016-02-13 3:25 ` Duc Dang
2016-02-13 3:39 ` [PATCH v6 0/3] mailbox: Add " Duc Dang
2016-02-13 3:39 ` Duc Dang
2016-02-13 3:39 ` Duc Dang
2016-02-13 3:39 ` [PATCH v6 1/3] mailbox: Add support for " Duc Dang
2016-02-13 3:39 ` Duc Dang
2016-02-13 3:39 ` Duc Dang
2016-02-13 3:39 ` [PATCH v6 2/3] Documentation: mailbox: Add APM X-Gene SLIMpro mailbox dts documentation Duc Dang
2016-02-13 3:39 ` Duc Dang
2016-02-13 3:39 ` [PATCH v6 3/3] arm64: dts: mailbox device tree node for APM X-Gene platform Duc Dang
2016-02-13 3:39 ` Duc Dang
2016-02-25 22:33 ` Duc Dang
2016-02-25 22:33 ` Duc Dang
2016-02-19 20:43 ` [PATCH v6 0/3] mailbox: Add APM X-Gene platform mailbox driver Duc Dang
2016-02-19 20:43 ` Duc Dang
2016-02-19 20:43 ` Duc Dang
2016-02-08 22:04 ` [PATCH v5 2/3] Documentation: mailbox: Add APM X-Gene SLIMpro mailbox dts documentation Duc Dang
2016-02-08 22:04 ` Duc Dang
2016-02-08 22:04 ` [PATCH v5 3/3] arm64: dts: mailbox device tree node for APM X-Gene platform Duc Dang
2016-02-08 22:04 ` Duc Dang
2016-01-16 2:57 ` [PATCH v4 2/3] Documentation: mailbox: Add APM X-Gene SLIMpro mailbox dts documentation Duc Dang
2016-01-16 2:57 ` Duc Dang
2016-01-16 2:57 ` Duc Dang
2016-01-17 0:13 ` Rob Herring
2016-01-17 0:13 ` Rob Herring
2016-01-19 23:53 ` Duc Dang
2016-01-19 23:53 ` Duc Dang
2016-01-19 23:53 ` Duc Dang
2016-01-16 2:57 ` [PATCH v4 3/3] arm64: dts: mailbox device tree node for APM X-Gene platform Duc Dang
2016-01-16 2:57 ` Duc Dang
2015-11-09 18:05 ` [PATCH v3 2/3] Documentation: mailbox: Add APM X-Gene SLIMpro mailbox dts documentation Duc Dang
2015-11-09 18:05 ` Duc Dang
2015-11-10 14:15 ` Rob Herring
2015-11-10 14:15 ` Rob Herring
2015-11-10 18:42 ` Duc Dang
2015-11-10 18:42 ` Duc Dang
2016-01-16 2:41 ` Duc Dang
2016-01-16 2:41 ` Duc Dang
2015-11-09 18:05 ` [PATCH v3 3/3] arm64: dts: mailbox device tree node for APM X-Gene platform Duc Dang
2015-11-09 18:05 ` Duc Dang
2015-11-16 19:22 ` [PATCH v3 0/3] mailbox: Add APM X-Gene platform mailbox driver Duc Dang
2015-11-16 19:22 ` Duc Dang
2015-11-16 19:22 ` Duc Dang
2015-11-20 10:39 ` Paul Bolle
2015-11-20 10:39 ` Paul Bolle
2015-11-20 10:39 ` Paul Bolle
2015-04-22 22:18 ` [PATCH V2 2/4] mailbox: xgene: add ACPI support for X-Gene " Feng Kan
2015-04-22 22:18 ` Feng Kan
2015-04-22 22:18 ` [PATCH V2 3/4] Documentation: mailbox: Add APM X-Gene SLIMpro mailbox dts documentation Feng Kan
2015-04-22 22:18 ` Feng Kan
[not found] ` <1429741125-29156-1-git-send-email-fkan-qTEPVZfXA3Y@public.gmane.org>
2015-04-22 22:18 ` [PATCH V2 4/4] arm64: dts: mailbox device tree node for APM X-Gene platform Feng Kan
2015-04-22 22:18 ` Feng Kan
2015-04-22 22:18 ` Feng Kan
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