[PATCH] MMC: add support for the Marvell platform SDHCI controller

[Mike Rapoport <mike@compulab.co.il>]

Signed-off-by: Mike Rapoport <mike@compulab.co.il>
CC: Saeed Bishara <saeed@marvell.com>
---
 drivers/mmc/host/Kconfig       |   13 +++++++
 drivers/mmc/host/Makefile      |    1 +
 drivers/mmc/host/sdhci-mv.c    |   77 ++++++++++++++++++++++++++++++++++++++++
 drivers/mmc/host/sdhci-pltfm.c |    3 ++
 drivers/mmc/host/sdhci-pltfm.h |    1 +
 5 files changed, 95 insertions(+), 0 deletions(-)
 create mode 100644 drivers/mmc/host/sdhci-mv.c

diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
index 68d1279..1952fa9 100644
--- a/drivers/mmc/host/Kconfig
+++ b/drivers/mmc/host/Kconfig
@@ -130,6 +130,19 @@ config MMC_SDHCI_CNS3XXX
 
 	  If unsure, say N.
 
+config MMC_SDHCI_MV
+	bool "SDHCI support on Marvell's SoC"
+	depends on MMC_SDHCI
+	depends on MMC_SDHCI_PLTFM
+	select MMC_SDHCI_IO_ACCESSORS
+	help
+	  This selects the Secure Digital Host Controller Interface in
+	  Marvell's SoC controllers.
+
+	  If you have a controller with this interface, say Y or M here.
+
+	  If unsure, say N.
+
 config MMC_SDHCI_S3C
 	tristate "SDHCI support on Samsung S3C SoC"
 	depends on MMC_SDHCI && PLAT_SAMSUNG
diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile
index 840bcb5..fdb3e96 100644
--- a/drivers/mmc/host/Makefile
+++ b/drivers/mmc/host/Makefile
@@ -40,6 +40,7 @@ obj-$(CONFIG_MMC_JZ4740)	+= jz4740_mmc.o
 obj-$(CONFIG_MMC_SDHCI_PLTFM)			+= sdhci-platform.o
 sdhci-platform-y				:= sdhci-pltfm.o
 sdhci-platform-$(CONFIG_MMC_SDHCI_CNS3XXX)	+= sdhci-cns3xxx.o
+sdhci-platform-$(CONFIG_MMC_SDHCI_MV)		+= sdhci-mv.o
 
 obj-$(CONFIG_MMC_SDHCI_OF)	+= sdhci-of.o
 sdhci-of-y				:= sdhci-of-core.o
diff --git a/drivers/mmc/host/sdhci-mv.c b/drivers/mmc/host/sdhci-mv.c
new file mode 100644
index 0000000..b461205
--- /dev/null
+++ b/drivers/mmc/host/sdhci-mv.c
@@ -0,0 +1,77 @@
+/*
+ * sdhci-mv.c Support for SDHCI platform devices
+ *
+ * Author: Saeed Bishara <saeed@marvell.com>
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+/*
+ * SDHCI platform devices found on Marvell SoC's
+ *
+ * Based on  sdhci-cns3xxx.c
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+#include <linux/mmc/host.h>
+#include "sdhci.h"
+#include "sdhci-pltfm.h"
+
+static u16 sdhci_mv_readw(struct sdhci_host *host, int reg)
+{
+	u16 ret;
+
+	switch (reg) {
+	case SDHCI_HOST_VERSION:
+	case SDHCI_SLOT_INT_STATUS:
+		/* those registers don't exist */
+		return 0;
+	default:
+		ret = readw(host->ioaddr + reg);
+	}
+	return ret;
+}
+
+static u32 sdhci_mv_readl(struct sdhci_host *host, int reg)
+{
+	u32 ret;
+
+	switch (reg) {
+	case SDHCI_CAPABILITIES:
+		ret = readl(host->ioaddr + reg);
+		/* Mask the support for 3.0V */
+		ret &= ~SDHCI_CAN_VDD_300;
+		break;
+	default:
+		ret = readl(host->ioaddr + reg);
+	}
+	return ret;
+}
+
+static struct sdhci_ops sdhci_mv_ops = {
+	.read_w	= sdhci_mv_readw,
+	.read_l	= sdhci_mv_readl,
+};
+
+struct sdhci_pltfm_data sdhci_mv_pdata = {
+	.ops	= &sdhci_mv_ops,
+	.quirks	= SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER |
+		  SDHCI_QUIRK_NO_BUSY_IRQ |
+		  SDHCI_QUIRK_BROKEN_TIMEOUT_VAL |
+		  SDHCI_QUIRK_FORCE_DMA,
+};
diff --git a/drivers/mmc/host/sdhci-pltfm.c b/drivers/mmc/host/sdhci-pltfm.c
index e045e3c..3a389c2 100644
--- a/drivers/mmc/host/sdhci-pltfm.c
+++ b/drivers/mmc/host/sdhci-pltfm.c
@@ -161,6 +161,9 @@ static const struct platform_device_id sdhci_pltfm_ids[] = {
 #ifdef CONFIG_MMC_SDHCI_CNS3XXX
 	{ "sdhci-cns3xxx", (kernel_ulong_t)&sdhci_cns3xxx_pdata },
 #endif
+#ifdef CONFIG_MMC_SDHCI_MV
+	{ "sdhci-mv", (kernel_ulong_t)&sdhci_mv_pdata },
+#endif
 	{ },
 };
 MODULE_DEVICE_TABLE(platform, sdhci_pltfm_ids);
diff --git a/drivers/mmc/host/sdhci-pltfm.h b/drivers/mmc/host/sdhci-pltfm.h
index 900f329..17da875 100644
--- a/drivers/mmc/host/sdhci-pltfm.h
+++ b/drivers/mmc/host/sdhci-pltfm.h
@@ -14,5 +14,6 @@
 #include <linux/sdhci-pltfm.h>
 
 extern struct sdhci_pltfm_data sdhci_cns3xxx_pdata;
+extern struct sdhci_pltfm_data sdhci_mv_pdata;
 
 #endif /* _DRIVERS_MMC_SDHCI_PLTFM_H */
-- 
1.7.3.1