* [PATCH V3 2/2] mmc: sdhci-brcmstb: Add driver for Broadcom BRCMSTB SoCs
2016-02-10 20:25 [PATCH V3 0/2] Add SDHCI driver for Broadcom BRCMSTB/BMIPS Soc's Al Cooper
2016-02-10 20:25 ` [PATCH V3 1/2] mmc: sdhci: Allow CAPS check for SDHCI_CAN_64BIT to use overridden caps Al Cooper
@ 2016-02-10 20:25 ` Al Cooper
1 sibling, 0 replies; 5+ messages in thread
From: Al Cooper @ 2016-02-10 20:25 UTC (permalink / raw)
To: ulf.hansson, adrian.hunter, linux-mmc, bcm-kernel-feedback-list; +Cc: Al Cooper
Signed-off-by: Al Cooper <alcooperx@gmail.com>
---
.../devicetree/bindings/mmc/sdhci-brcmstb.txt | 40 ++++++
MAINTAINERS | 7 +
drivers/mmc/host/Kconfig | 11 ++
drivers/mmc/host/Makefile | 1 +
drivers/mmc/host/sdhci-brcmstb.c | 154 +++++++++++++++++++++
5 files changed, 213 insertions(+)
create mode 100644 Documentation/devicetree/bindings/mmc/sdhci-brcmstb.txt
create mode 100644 drivers/mmc/host/sdhci-brcmstb.c
diff --git a/Documentation/devicetree/bindings/mmc/sdhci-brcmstb.txt b/Documentation/devicetree/bindings/mmc/sdhci-brcmstb.txt
new file mode 100644
index 0000000..f8dd6a9d
--- /dev/null
+++ b/Documentation/devicetree/bindings/mmc/sdhci-brcmstb.txt
@@ -0,0 +1,40 @@
+* BROADCOM BRCMSTB/BMIPS SDHCI Controller
+
+This file documents differences between the core properties in mmc.txt
+and the properties used by the sdhci-brcmstb driver.
+
+Required properties:
+- compatible: "brcm,sdhci-brcmstb"
+
+Optional properties:
+- broken-sdr50: The Host Controller's SDR50 mode is broken.
+- broken-ddr50: The Host Controller's DDR50 mode is broken.
+- broken-64-bit-dma: 64 BIT DMA mode is broken, use 32 BIT DMA.
+- broken-timeout-value: The Host Controller CAPABILITY timeout value is incorrrect, use the maximum timeout.
+
+
+Example:
+
+ sdhci@f03e0100 {
+ compatible = "brcm,sdhci-brcmstb";
+ reg = <0xf03e0000 0x100>;
+ interrupts = <0x0 0x26 0x0>;
+ interrupt-names = "sdio0_0";
+ sdhci,auto-cmd12;
+ clocks = <0x13>;
+ clock-names = "sw_sdio";
+ broken-sdr50;
+ };
+
+ sdhci@f03e0300 {
+ no-1-8-v;
+ non-removable;
+ bus-width = <0x8>;
+ compatible = "brcm,sdhci-brcmstb";
+ reg = <0xf03e0200 0x100>;
+ interrupts = <0x0 0x27 0x0>;
+ interrupt-names = "sdio1_0";
+ sdhci,auto-cmd12;
+ clocks = <0x13>;
+ clock-names = "sw_sdio";
+ };
diff --git a/MAINTAINERS b/MAINTAINERS
index 30aca4a..2d9c90c 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -9724,6 +9724,13 @@ F: tools/testing/selftests/seccomp/*
K: \bsecure_computing
K: \bTIF_SECCOMP\b
+SECURE DIGITAL HOST CONTROLLER INTERFACE (SDHCI) Broadcom BRCMSTB DRIVER
+M: Al Cooper <alcooperx@gmail.com>
+L: linux-mmc@vger.kernel.org
+L: bcm-kernel-feedback-list@broadcom.com
+S: Maintained
+F: drivers/mmc/host/sdhci-brcmstb*
+
SECURE DIGITAL HOST CONTROLLER INTERFACE (SDHCI) SAMSUNG DRIVER
M: Ben Dooks <ben-linux@fluff.org>
M: Jaehoon Chung <jh80.chung@samsung.com>
diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
index 4a35ebf..85bf266 100644
--- a/drivers/mmc/host/Kconfig
+++ b/drivers/mmc/host/Kconfig
@@ -797,3 +797,14 @@ config MMC_SDHCI_MICROCHIP_PIC32
If you have a controller with this interface, say Y or M here.
If unsure, say N.
+config MMC_SDHCI_BRCMSTB
+ tristate "Broadcom SDIO/SD/MMC support"
+ depends on ARCH_BRCMSTB || BMIPS_GENERIC
+ depends on MMC_SDHCI_PLTFM
+ default y
+ select MMC_SDHCI_IO_ACCESSORS
+ help
+ This selects support for the SDIO/SD/MMC Host Controller on
+ Broadcom STB SoCs.
+
+ If unsure, say Y.
diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile
index af918d2..2075c11 100644
--- a/drivers/mmc/host/Makefile
+++ b/drivers/mmc/host/Makefile
@@ -76,6 +76,7 @@ obj-$(CONFIG_MMC_SDHCI_IPROC) += sdhci-iproc.o
obj-$(CONFIG_MMC_SDHCI_MSM) += sdhci-msm.o
obj-$(CONFIG_MMC_SDHCI_ST) += sdhci-st.o
obj-$(CONFIG_MMC_SDHCI_MICROCHIP_PIC32) += sdhci-pic32.o
+obj-$(CONFIG_MMC_SDHCI_BRCMSTB) += sdhci-brcmstb.o
ifeq ($(CONFIG_CB710_DEBUG),y)
CFLAGS-cb710-mmc += -DDEBUG
diff --git a/drivers/mmc/host/sdhci-brcmstb.c b/drivers/mmc/host/sdhci-brcmstb.c
new file mode 100644
index 0000000..0e6cca6
--- /dev/null
+++ b/drivers/mmc/host/sdhci-brcmstb.c
@@ -0,0 +1,154 @@
+/*
+ * sdhci-brcmstb.c Support for SDHCI on Broadcom BRCMSTB SoC's
+ *
+ * Copyright (C) 2015 Broadcom Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * 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.
+ *
+ */
+
+#include <linux/io.h>
+#include <linux/mmc/host.h>
+#include <linux/module.h>
+#include <linux/of.h>
+
+#include "sdhci-pltfm.h"
+
+static void brcmstb_of_parse(struct platform_device *pdev,
+ struct sdhci_host *host)
+{
+ struct device_node *np = pdev->dev.of_node;
+
+ host->quirks |= SDHCI_QUIRK_MISSING_CAPS;
+ host->caps = sdhci_readl(host, SDHCI_CAPABILITIES);
+ host->caps1 = sdhci_readl(host, SDHCI_CAPABILITIES_1);
+ if (of_get_property(np, "broken-sdr50", NULL))
+ host->caps1 &= ~(SDHCI_SUPPORT_SDR104 | SDHCI_SUPPORT_SDR50);
+ if (of_find_property(np, "broken-ddr50", NULL))
+ host->caps1 &= ~SDHCI_SUPPORT_DDR50;
+ if (of_get_property(np, "broken-64-bit-dma", NULL))
+ host->caps &= ~SDHCI_CAN_64BIT;
+ if (of_get_property(np, "broken-timeout-value", NULL))
+ host->quirks |= SDHCI_QUIRK_BROKEN_TIMEOUT_VAL;
+}
+
+
+#ifdef CONFIG_PM_SLEEP
+
+static int sdhci_brcmstb_suspend(struct device *dev)
+{
+ struct sdhci_host *host = dev_get_drvdata(dev);
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ int res;
+
+ res = sdhci_suspend_host(host);
+ if (res)
+ return res;
+ clk_disable(pltfm_host->clk);
+ return res;
+}
+
+static int sdhci_brcmstb_resume(struct device *dev)
+{
+ struct sdhci_host *host = dev_get_drvdata(dev);
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ int err;
+
+ err = clk_enable(pltfm_host->clk);
+ if (err)
+ return err;
+ return sdhci_resume_host(host);
+}
+
+#endif /* CONFIG_PM_SLEEP */
+
+static SIMPLE_DEV_PM_OPS(sdhci_brcmstb_pmops, sdhci_brcmstb_suspend,
+ sdhci_brcmstb_resume);
+
+static const struct sdhci_ops sdhci_brcmstb_ops = {
+ .set_clock = sdhci_set_clock,
+ .set_bus_width = sdhci_set_bus_width,
+ .reset = sdhci_reset,
+ .set_uhs_signaling = sdhci_set_uhs_signaling,
+};
+
+static struct sdhci_pltfm_data sdhci_brcmstb_pdata = {
+ .ops = &sdhci_brcmstb_ops,
+};
+
+static int sdhci_brcmstb_probe(struct platform_device *pdev)
+{
+ struct device_node *dn = pdev->dev.of_node;
+ struct sdhci_host *host;
+ struct sdhci_pltfm_host *pltfm_host;
+ struct clk *clk;
+ int res;
+
+ clk = of_clk_get_by_name(dn, "sw_sdio");
+ if (IS_ERR(clk)) {
+ dev_err(&pdev->dev, "Clock not found in Device Tree\n");
+ clk = NULL;
+ }
+ res = clk_prepare_enable(clk);
+ if (res)
+ goto undo_clk_get;
+
+ host = sdhci_pltfm_init(pdev, &sdhci_brcmstb_pdata, 0);
+ if (IS_ERR(host)) {
+ res = PTR_ERR(host);
+ goto undo_clk_prep;
+ }
+
+ /* Enable MMC_CAP2_HC_ERASE_SZ for better max discard calculations */
+ host->mmc->caps2 |= MMC_CAP2_HC_ERASE_SZ;
+
+ sdhci_get_of_property(pdev);
+ mmc_of_parse(host->mmc);
+ brcmstb_of_parse(pdev, host);
+
+ res = sdhci_add_host(host);
+ if (res)
+ goto undo_pltfm_init;
+
+ pltfm_host = sdhci_priv(host);
+ pltfm_host->clk = clk;
+ return res;
+
+undo_pltfm_init:
+ sdhci_pltfm_free(pdev);
+undo_clk_prep:
+ clk_disable_unprepare(clk);
+undo_clk_get:
+ clk_put(clk);
+ return res;
+}
+
+static const struct of_device_id sdhci_brcm_of_match[] = {
+ { .compatible = "brcm,sdhci-brcmstb" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, sdhci_brcm_of_match);
+
+static struct platform_driver sdhci_brcmstb_driver = {
+ .driver = {
+ .name = "sdhci-brcmstb",
+ .owner = THIS_MODULE,
+ .pm = &sdhci_brcmstb_pmops,
+ .of_match_table = of_match_ptr(sdhci_brcm_of_match),
+ },
+ .probe = sdhci_brcmstb_probe,
+ .remove = sdhci_pltfm_unregister,
+};
+
+module_platform_driver(sdhci_brcmstb_driver);
+
+MODULE_DESCRIPTION("SDHCI driver for Broadcom BRCMSTB SoCs");
+MODULE_AUTHOR("Broadcom");
+MODULE_LICENSE("GPL v2");
--
1.9.0.138.g2de3478
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