* [PATCH v13 1/2] dt-bindings: mediatek: add adsp-mbox document
2022-01-13 8:21 [PATCH v13 0/2] Mediatek ADSP mailbox controller support for MT8195 allen-kh.cheng
@ 2022-01-13 8:21 ` allen-kh.cheng
2022-01-13 8:21 ` [PATCH v13 2/2] mailbox: mediatek: add support for adsp mailbox controller allen-kh.cheng
1 sibling, 0 replies; 5+ messages in thread
From: allen-kh.cheng @ 2022-01-13 8:21 UTC (permalink / raw)
To: Jassi Brar, Rob Herring, Matthias Brugger
Cc: devicetree, Linux-ALSA, Allen-KH Cheng, Kai Vehmanen,
Liam Girdwood, cujomalainey, Kevin Hilman, Takashi Iwai,
Ranjani Sridharan, Pierre-Louis Bossart,
Project_Global_Chrome_Upstream_Group, tzungbi, Mark Brown,
linux-mediatek, linux-arm-kernel, Daniel Baluta, linux-kernel,
sound-open-firmware
From: Allen-KH Cheng <Allen-KH.Cheng@mediatek.com>
This patch adds document for mediatek adsp mbox
Signed-off-by: Allen-KH Cheng <Allen-KH.Cheng@mediatek.com>
---
.../bindings/mailbox/mtk,adsp-mbox.yaml | 52 +++++++++++++++++++
1 file changed, 52 insertions(+)
create mode 100644 Documentation/devicetree/bindings/mailbox/mtk,adsp-mbox.yaml
diff --git a/Documentation/devicetree/bindings/mailbox/mtk,adsp-mbox.yaml b/Documentation/devicetree/bindings/mailbox/mtk,adsp-mbox.yaml
new file mode 100644
index 000000000000..25756837797f
--- /dev/null
+++ b/Documentation/devicetree/bindings/mailbox/mtk,adsp-mbox.yaml
@@ -0,0 +1,52 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mailbox/mtk,adsp-mbox.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Mediatek ADSP mailbox
+
+maintainers:
+ - Allen-KH Cheng <Allen-KH.Cheng@mediatek.com>
+
+description: |
+ The MTK ADSP mailbox Inter-Processor Communication (IPC) enables the SoC
+ to ommunicate with ADSP by passing messages through two mailbox channels.
+ The MTK ADSP mailbox IPC also provides the ability for one processor to
+ signal the other processor using interrupts.
+
+properties:
+ compatible:
+ items:
+ - const: mediatek,mt8195-adsp-mbox
+
+ "#mbox-cells":
+ const: 0
+
+ reg:
+ description:
+ Physical address base for dsp mbox registers.
+
+ interrupts:
+ description:
+ adsp mbox interrupt
+
+required:
+ - compatible
+ - "#mbox-cells"
+ - reg
+ - interrupts
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/interrupt-controller/arm-gic.h>
+ #include <dt-bindings/interrupt-controller/irq.h>
+
+ adsp_mailbox0:mailbox@10816000 {
+ compatible = "mediatek,mt8195-adsp-mbox";
+ #mbox-cells = <0>;
+ reg = <0x10816000 0x1000>;
+ interrupts = <GIC_SPI 702 IRQ_TYPE_LEVEL_HIGH 0>;
+ };
--
2.18.0
^ permalink raw reply related [flat|nested] 5+ messages in thread* [PATCH v13 2/2] mailbox: mediatek: add support for adsp mailbox controller
2022-01-13 8:21 [PATCH v13 0/2] Mediatek ADSP mailbox controller support for MT8195 allen-kh.cheng
2022-01-13 8:21 ` [PATCH v13 1/2] dt-bindings: mediatek: add adsp-mbox document allen-kh.cheng
@ 2022-01-13 8:21 ` allen-kh.cheng
2022-01-13 18:47 ` Pierre-Louis Bossart
1 sibling, 1 reply; 5+ messages in thread
From: allen-kh.cheng @ 2022-01-13 8:21 UTC (permalink / raw)
To: Jassi Brar, Rob Herring, Matthias Brugger
Cc: devicetree, Linux-ALSA, Allen-KH Cheng, Kai Vehmanen,
Liam Girdwood, cujomalainey, Kevin Hilman, Takashi Iwai,
Ranjani Sridharan, Pierre-Louis Bossart,
Project_Global_Chrome_Upstream_Group, tzungbi, Mark Brown,
linux-mediatek, linux-arm-kernel, Daniel Baluta, linux-kernel,
sound-open-firmware
From: Allen-KH Cheng <Allen-KH.Cheng@mediatek.com>
This patch is to for MediaTek ADSP IPC mailbox controller driver
It is used to send short messages between processors with adsp
Reviewed-by: Tzung-Bi Shih <tzungbi@google.com>
Signed-off-by: Allen-KH Cheng <Allen-KH.Cheng@mediatek.com>
---
drivers/mailbox/Kconfig | 7 ++
drivers/mailbox/Makefile | 2 +
drivers/mailbox/mtk-adsp-mailbox.c | 172 +++++++++++++++++++++++++++++
3 files changed, 181 insertions(+)
create mode 100644 drivers/mailbox/mtk-adsp-mailbox.c
diff --git a/drivers/mailbox/Kconfig b/drivers/mailbox/Kconfig
index d9cd3606040e..3e5bb745437d 100644
--- a/drivers/mailbox/Kconfig
+++ b/drivers/mailbox/Kconfig
@@ -238,6 +238,13 @@ config STM32_IPCC
with hardware for Inter-Processor Communication Controller (IPCC)
between processors. Say Y here if you want to have this support.
+config MTK_ADSP_MBOX
+ tristate "MediaTek ADSP Mailbox Controller"
+ depends on ARCH_MEDIATEK || COMPILE_TEST
+ help
+ Say yes here to add support for MediaTek ADSP mailbox controller
+ driver. It is used to send short messages between processors with dsp.
+
config MTK_CMDQ_MBOX
tristate "MediaTek CMDQ Mailbox Support"
depends on ARCH_MEDIATEK || COMPILE_TEST
diff --git a/drivers/mailbox/Makefile b/drivers/mailbox/Makefile
index 338cc05e5431..fc9376117111 100644
--- a/drivers/mailbox/Makefile
+++ b/drivers/mailbox/Makefile
@@ -49,6 +49,8 @@ obj-$(CONFIG_TEGRA_HSP_MBOX) += tegra-hsp.o
obj-$(CONFIG_STM32_IPCC) += stm32-ipcc.o
+obj-$(CONFIG_MTK_ADSP_MBOX) += mtk-adsp-mailbox.o
+
obj-$(CONFIG_MTK_CMDQ_MBOX) += mtk-cmdq-mailbox.o
obj-$(CONFIG_ZYNQMP_IPI_MBOX) += zynqmp-ipi-mailbox.o
diff --git a/drivers/mailbox/mtk-adsp-mailbox.c b/drivers/mailbox/mtk-adsp-mailbox.c
new file mode 100644
index 000000000000..ee131ed8b449
--- /dev/null
+++ b/drivers/mailbox/mtk-adsp-mailbox.c
@@ -0,0 +1,172 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2022 MediaTek Corporation. All rights reserved.
+ * Author: Allen-KH Cheng <allen-kh.cheng@mediatek.com>
+ */
+
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/iopoll.h>
+#include <linux/kernel.h>
+#include <linux/mailbox_controller.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/slab.h>
+
+struct mtk_adsp_mbox_priv {
+ struct device *dev;
+ struct mbox_controller mbox;
+ void __iomem *va_mboxreg;
+ const struct mtk_adsp_mbox_cfg *cfg;
+};
+
+struct mtk_adsp_mbox_cfg {
+ u32 set_in;
+ u32 set_out;
+ u32 clr_in;
+ u32 clr_out;
+};
+
+static struct mtk_adsp_mbox_priv *get_mtk_adsp_mbox_priv(struct mbox_controller *mbox)
+{
+ return container_of(mbox, struct mtk_adsp_mbox_priv, mbox);
+}
+
+static irqreturn_t mtk_adsp_mbox_irq(int irq, void *data)
+{
+ struct mbox_chan *chan = data;
+ struct mtk_adsp_mbox_priv *priv = get_mtk_adsp_mbox_priv(chan->mbox);
+ u32 op = readl(priv->va_mboxreg + priv->cfg->set_out);
+
+ writel(op, priv->va_mboxreg + priv->cfg->clr_out);
+
+ return IRQ_WAKE_THREAD;
+}
+
+static irqreturn_t mtk_adsp_mbox_isr(int irq, void *data)
+{
+ struct mbox_chan *chan = data;
+
+ mbox_chan_received_data(chan, NULL);
+
+ return IRQ_HANDLED;
+}
+
+static struct mbox_chan *mtk_adsp_mbox_xlate(struct mbox_controller *mbox,
+ const struct of_phandle_args *sp)
+{
+ return mbox->chans;
+}
+
+static int mtk_adsp_mbox_startup(struct mbox_chan *chan)
+{
+ struct mtk_adsp_mbox_priv *priv = get_mtk_adsp_mbox_priv(chan->mbox);
+
+ /* Clear ADSP mbox command */
+ writel(0xFFFFFFFF, priv->va_mboxreg + priv->cfg->clr_in);
+ writel(0xFFFFFFFF, priv->va_mboxreg + priv->cfg->clr_out);
+
+ return 0;
+}
+
+static void mtk_adsp_mbox_shutdown(struct mbox_chan *chan)
+{
+ struct mtk_adsp_mbox_priv *priv = get_mtk_adsp_mbox_priv(chan->mbox);
+
+ /* Clear ADSP mbox command */
+ writel(0xFFFFFFFF, priv->va_mboxreg + priv->cfg->clr_in);
+ writel(0xFFFFFFFF, priv->va_mboxreg + priv->cfg->clr_out);
+}
+
+static int mtk_adsp_mbox_send_data(struct mbox_chan *chan, void *data)
+{
+ struct mtk_adsp_mbox_priv *priv = get_mtk_adsp_mbox_priv(chan->mbox);
+ u32 *msg = data;
+
+ writel(*msg, priv->va_mboxreg + priv->cfg->set_in);
+
+ return 0;
+}
+
+static bool mtk_adsp_mbox_last_tx_done(struct mbox_chan *chan)
+{
+ struct mtk_adsp_mbox_priv *priv = get_mtk_adsp_mbox_priv(chan->mbox);
+
+ return readl(priv->va_mboxreg + priv->cfg->set_in) == 0;
+}
+
+static const struct mbox_chan_ops mtk_adsp_mbox_chan_ops = {
+ .send_data = mtk_adsp_mbox_send_data,
+ .startup = mtk_adsp_mbox_startup,
+ .shutdown = mtk_adsp_mbox_shutdown,
+ .last_tx_done = mtk_adsp_mbox_last_tx_done,
+};
+
+static int mtk_adsp_mbox_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct mtk_adsp_mbox_priv *priv;
+ const struct mtk_adsp_mbox_cfg *cfg;
+ struct mbox_controller *mbox;
+ int ret, irq;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ mbox = &priv->mbox;
+ mbox->dev = dev;
+ mbox->ops = &mtk_adsp_mbox_chan_ops;
+ mbox->txdone_irq = false;
+ mbox->txdone_poll = true;
+ mbox->of_xlate = mtk_adsp_mbox_xlate;
+ mbox->num_chans = 1;
+ mbox->chans = devm_kzalloc(dev, sizeof(*mbox->chans), GFP_KERNEL);
+ if (!mbox->chans)
+ return -ENOMEM;
+
+ priv->va_mboxreg = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(priv->va_mboxreg))
+ return PTR_ERR(priv->va_mboxreg);
+
+ priv->cfg = of_device_get_match_data(dev);
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0)
+ return irq;
+
+ ret = devm_request_threaded_irq(dev, irq, mtk_adsp_mbox_irq,
+ mtk_adsp_mbox_isr, IRQF_TRIGGER_NONE,
+ dev_name(dev), mbox->chans);
+ if (ret < 0)
+ return ret;
+
+ platform_set_drvdata(pdev, priv);
+
+ return devm_mbox_controller_register(dev, &priv->mbox);
+}
+
+static const struct mtk_adsp_mbox_cfg mt8195_adsp_mbox_cfg = {
+ .set_in = 0x00,
+ .set_out = 0x1c,
+ .clr_in = 0x04,
+ .clr_out = 0x20,
+};
+
+static const struct of_device_id mtk_adsp_mbox_of_match[] = {
+ { .compatible = "mediatek,mt8195-adsp-mbox", .data = &mt8195_adsp_mbox_cfg },
+ {},
+};
+MODULE_DEVICE_TABLE(of, mtk_adsp_mbox_of_match);
+
+static struct platform_driver mtk_adsp_mbox_driver = {
+ .probe = mtk_adsp_mbox_probe,
+ .driver = {
+ .name = "mtk_adsp_mbox",
+ .of_match_table = mtk_adsp_mbox_of_match,
+ },
+};
+module_platform_driver(mtk_adsp_mbox_driver);
+
+MODULE_AUTHOR("Allen-KH Cheng <Allen-KH.Cheng@mediatek.com>");
+MODULE_DESCRIPTION("MTK ADSP Mailbox Controller");
--
2.18.0
^ permalink raw reply related [flat|nested] 5+ messages in thread