This patch adds the Arasan MMC/SD/SDIO driver
for the STM ST40 platforms. It is based on the
SDHCI driver.
It has been tested on the STx7106/STx7108/STx5289
platforms.
Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@xxxxxx>
---
drivers/mmc/host/Kconfig | 12 +++
drivers/mmc/host/Makefile | 1 +
drivers/mmc/host/sdhci-stm.c | 184 +++++++++++++++++++++++++++++++++++++++++
include/linux/mmc/sdhci-stm.h | 40 +++++++++
4 files changed, 237 insertions(+), 0 deletions(-)
create mode 100644 drivers/mmc/host/sdhci-stm.c
create mode 100644 include/linux/mmc/sdhci-stm.h
diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
index f06d06e..a5a3313 100644
--- a/drivers/mmc/host/Kconfig
+++ b/drivers/mmc/host/Kconfig
@@ -148,6 +148,18 @@ config MMC_SDHCI_SPEAR
If unsure, say N.
+config MMC_SDHCI_STM
+ tristate "SDHCI support on STM platforms"
+ depends on MMC_SDHCI && CPU_SUBTYPE_ST40
+ help
+ This selects the Secure Digital Host Controller Interface (SDHCI)
+ often referrered to as the HSMMC block in some of the STM range
+ of SoC (e.g. STx7106/STx7108/STx5289).
+
+ If you have a controller with this interface, say Y or M here.
+
+ If unsure, say N.
+
config MMC_SDHCI_S3C_DMA
bool "DMA support on S3C SDHCI"
depends on MMC_SDHCI_S3C && EXPERIMENTAL
diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile
index e30c2ee..7b47e8d 100644
--- a/drivers/mmc/host/Makefile
+++ b/drivers/mmc/host/Makefile
@@ -15,6 +15,7 @@ obj-$(CONFIG_MMC_SDHCI_PCI) += sdhci-pci.o
obj-$(CONFIG_MMC_SDHCI_PLTFM) += sdhci-pltfm.o
obj-$(CONFIG_MMC_SDHCI_S3C) += sdhci-s3c.o
obj-$(CONFIG_MMC_SDHCI_SPEAR) += sdhci-spear.o
+obj-$(CONFIG_MMC_SDHCI_STM) += sdhci-stm.o
obj-$(CONFIG_MMC_WBSD) += wbsd.o
obj-$(CONFIG_MMC_AU1X) += au1xmmc.o
obj-$(CONFIG_MMC_OMAP) += omap.o
diff --git a/drivers/mmc/host/sdhci-stm.c b/drivers/mmc/host/sdhci-stm.c
new file mode 100644
index 0000000..397ecf7
--- /dev/null
+++ b/drivers/mmc/host/sdhci-stm.c
@@ -0,0 +1,184 @@
+/* linux/drivers/mmc/host/sdhci-stm.c
+ *
+ * Copyright (C) 2010 STMicroelectronics Ltd
+ * Author: Giuseppe Cavallaro <peppe.cavallaro@xxxxxx>
+ *
+ * SDHCI support for STM platforms
+ *
+ * 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.
+ */
+
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/mmc/host.h>
+#include <linux/io.h>
+
+#include <linux/mmc/sdhci-stm.h>
+
+#include "sdhci.h"
+
+static struct sdhci_ops sdhci_pltfm_ops = {
+ /* Nothing to do for now. */
+};
+
+struct sdhci_stm {
+ struct sdhci_host *host;
+ struct platform_device *pdev;
+ struct resource *ioarea;
+ struct sdhci_platform_data *pdata;
+};
+
+static int __devinit sdhci_probe(struct platform_device *pdev)
+{
+ struct sdhci_platform_data *pdata;
+ struct device *dev = &pdev->dev;
+ struct sdhci_host *host;
+ struct sdhci_stm *sc;
+ struct resource *res;
+ int ret, irq;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_err(dev, "no memory specified\n");
+ return -ENOENT;
+ }
+
+ irq = platform_get_irq_byname(pdev, "mmcirq");
+ if (irq < 0) {
+ dev_err(dev, "no irq specified\n");
+ return irq;
+ }
+
+ pdata = pdev->dev.platform_data;
+ if (!pdata) {
+ dev_err(dev, "no device data specified\n");
+ return -ENOENT;
+ }
+
+ host = sdhci_alloc_host(&pdev->dev, 0);
+ if (IS_ERR(host)) {
+ ret = PTR_ERR(host);
+ dev_dbg(&pdev->dev, "error allocating host\n");
+ return PTR_ERR(host);
+ }
+
+ sc = sdhci_priv(host);
+ sc->host = host;
+ sc->pdev = pdev;
+ sc->pdata = pdata;
+
+ platform_set_drvdata(pdev, host);
+
+ sc->ioarea = request_mem_region(res->start, resource_size(res),
+ pdev->name);
+ if (!sc->ioarea) {
+ dev_err(dev, "failed to reserve register area\n");
+ ret = -ENXIO;
+ goto out;
+ }
+
+ ret = sdhci_claim_resource(pdev);
+ if (ret < 0)
+ goto out;
+
+ host->hw_name = "sdhci-stm";
+ host->ops = &sdhci_pltfm_ops;
+ host->irq = irq;
+ host->quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC;
+
+ host->ioaddr = ioremap(res->start, resource_size(res));
+ if (!host->ioaddr) {
+ dev_err(dev, "failed to map registers\n");
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ ret = sdhci_add_host(host);
+ if (ret) {
+ dev_dbg(&pdev->dev, "error adding host\n");
+ goto out;
+ }
+
+ return 0;
+
+out:
+ if (host->ioaddr)
+ iounmap(host->ioaddr);
+
+ if (sc->ioarea) {
+ release_resource(sc->ioarea);
+ kfree(sc->ioarea);
+ }
+
+ sdhci_free_host(host);
+
+ return ret;
+}
+
+static int __devexit sdhci_remove(struct platform_device *pdev)
+{
+ struct sdhci_host *host = platform_get_drvdata(pdev);
+ struct sdhci_stm *sc = sdhci_priv(host);
+
+ sdhci_remove_host(host, 1);
+
+ iounmap(host->ioaddr);
+ release_resource(sc->ioarea);
+ kfree(sc->ioarea);
+
+ sdhci_free_host(host);
+ platform_set_drvdata(pdev, NULL);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int sdhci_stm_suspend(struct platform_device *dev, pm_message_t pm)
+{
+ struct sdhci_host *host = platform_get_drvdata(dev);
+
+ sdhci_suspend_host(host, pm);
+ return 0;
+}
+
+static int sdhci_stm_resume(struct platform_device *dev)
+{
+ struct sdhci_host *host = platform_get_drvdata(dev);
+
+ sdhci_resume_host(host);
+ return 0;
+}
+#endif
+
+static struct platform_driver sdhci_driver = {
+ .driver = {
+ .name = "sdhci-stm",
+ .owner = THIS_MODULE,
+ },
+ .probe = sdhci_probe,
+ .remove = __devexit_p(sdhci_remove),
+#ifdef CONFIG_PM
+ .suspend = sdhci_stm_suspend,
+ .resume = sdhci_stm_resume,
+#endif
+};
+
+static int __init sdhci_stm_init(void)
+{
+ return platform_driver_register(&sdhci_driver);
+}
+
+module_init(sdhci_stm_init);
+
+static void __exit sdhci_stm_exit(void)
+{
+ platform_driver_unregister(&sdhci_driver);
+}
+
+module_exit(sdhci_stm_exit);
+
+MODULE_DESCRIPTION("STM Secure Digital Host Controller Interface driver");
+MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@xxxxxx>");
+MODULE_LICENSE("GPL v2");
diff --git a/include/linux/mmc/sdhci-stm.h b/include/linux/mmc/sdhci-stm.h
new file mode 100644
index 0000000..4e6ad14
--- /dev/null
+++ b/include/linux/mmc/sdhci-stm.h
@@ -0,0 +1,40 @@
+/*
+ * Author: Giuseppe Cavallaro <peppe.cavallaro@xxxxxx>
+ *
+ * include/linux/mmc/sdhci-stm.h
+ *
+ * platform data for the sdhci stm driver.
+ *
+ * Copyright (C) 2010 STMicroelectronics Ltd
+ *
+ * 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.
+ *
+ */
+
+#ifndef __SDHCI_STM_PLAT_H__
+#define __SDHCI_STM_PLAT_H__
+
+#include <linux/stm/platform.h>
+#include <linux/stm/pad.h>
+
+struct sdhci_platform_data {
+ struct stm_pad_config *pad_config;
+};
+
+/* SDHCI_STM Resource configuration */
+static inline int sdhci_claim_resource(struct platform_device *pdev)
+{
+ int ret = 0;
+ struct sdhci_platform_data *plat_dat = pdev->dev.platform_data;
+
+ /* Pad routing setup required on STM platforms */
+ if (!devm_stm_pad_claim(&pdev->dev, plat_dat->pad_config,
+ dev_name(&pdev->dev))) {
+ pr_err("%s: Failed to request pads!\n", __func__);
+ ret = -ENODEV;
+ }
+ return ret;
+}
+#endif /* __SDHCI_STM_PLAT_H__ */
--
1.5.5.6
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