davinci: MMC platform support

Add SoC and platform-specific data and init for MMC driver.

Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>

5 files changed, 271 insertions, 0 deletions

diff --git a/arch/arm/mach-davinci/board-dm355-evm.c b/arch/arm/mach-davinci/board-dm355-evm.c
index 6af3c6c..0874413 100644
--- a/arch/arm/mach-davinci/board-dm355-evm.c
+++ b/arch/arm/mach-davinci/board-dm355-evm.c
@@ -36,6 +36,7 @@
 #include <mach/i2c.h>
 #include <mach/serial.h>
 #include <mach/nand.h>
+#include <mach/mmc.h>
 
 #define DAVINCI_ASYNC_EMIF_CONTROL_BASE		0x01e10000
 #define DAVINCI_ASYNC_EMIF_DATA_CE0_BASE	0x02000000
@@ -191,6 +192,31 @@ static void __init dm355_evm_map_io(void)
 	dm355_init();
 }
 
+static int dm355evm_mmc_get_cd(int module)
+{
+	if (!gpio_is_valid(dm355evm_mmc_gpios))
+		return -ENXIO;
+	/* low == card present */
+	return !gpio_get_value_cansleep(dm355evm_mmc_gpios + 2 * module + 1);
+}
+
+static int dm355evm_mmc_get_ro(int module)
+{
+	if (!gpio_is_valid(dm355evm_mmc_gpios))
+		return -ENXIO;
+	/* high == card's write protect switch active */
+	return gpio_get_value_cansleep(dm355evm_mmc_gpios + 2 * module + 0);
+}
+
+static struct davinci_mmc_config dm355evm_mmc_config = {
+	.get_cd		= dm355evm_mmc_get_cd,
+	.get_ro		= dm355evm_mmc_get_ro,
+	.wires		= 4,
+	.max_freq       = 50000000,
+	.caps           = MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED,
+	.version	= MMC_CTLR_VERSION_1,
+};
+
 /* Don't connect anything to J10 unless you're only using USB host
  * mode *and* have to do so with some kind of gender-bender.  If
  * you have proper Mini-B or Mini-A cables (or Mini-A adapters)
@@ -249,6 +275,9 @@ static __init void dm355_evm_init(void)
 	/* irlml6401 switches over 1A in under 8 msec */
 	setup_usb(500, 8);
 
+	davinci_setup_mmc(0, &dm355evm_mmc_config);
+	davinci_setup_mmc(1, &dm355evm_mmc_config);
+
 	dm355_init_spi0(BIT(0), dm355_evm_spi_info,
 			ARRAY_SIZE(dm355_evm_spi_info));
 }
diff --git a/arch/arm/mach-davinci/board-dm355-leopard.c b/arch/arm/mach-davinci/board-dm355-leopard.c
index 22f16f3..d4562f5 100644
--- a/arch/arm/mach-davinci/board-dm355-leopard.c
+++ b/arch/arm/mach-davinci/board-dm355-leopard.c
@@ -35,6 +35,7 @@
 #include <mach/i2c.h>
 #include <mach/serial.h>
 #include <mach/nand.h>
+#include <mach/mmc.h>
 
 #define DAVINCI_ASYNC_EMIF_CONTROL_BASE		0x01e10000
 #define DAVINCI_ASYNC_EMIF_DATA_CE0_BASE	0x02000000
@@ -190,6 +191,30 @@ static void __init dm355_leopard_map_io(void)
 	dm355_init();
 }
 
+static int dm355leopard_mmc_get_cd(int module)
+{
+	if (!gpio_is_valid(leopard_mmc_gpio))
+		return -ENXIO;
+	/* low == card present */
+	return !gpio_get_value_cansleep(leopard_mmc_gpio + 2 * module + 1);
+}
+
+static int dm355leopard_mmc_get_ro(int module)
+{
+	if (!gpio_is_valid(leopard_mmc_gpio))
+		return -ENXIO;
+	/* high == card's write protect switch active */
+	return gpio_get_value_cansleep(leopard_mmc_gpio + 2 * module + 0);
+}
+
+static struct davinci_mmc_config dm355leopard_mmc_config = {
+	.get_cd		= dm355leopard_mmc_get_cd,
+	.get_ro		= dm355leopard_mmc_get_ro,
+	.wires		= 4,
+	.max_freq       = 50000000,
+	.caps           = MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED,
+};
+
 /* Don't connect anything to J10 unless you're only using USB host
  * mode *and* have to do so with some kind of gender-bender.  If
  * you have proper Mini-B or Mini-A cables (or Mini-A adapters)
@@ -248,6 +273,9 @@ static __init void dm355_leopard_init(void)
 	/* irlml6401 switches over 1A in under 8 msec */
 	setup_usb(500, 8);
 
+	davinci_setup_mmc(0, &dm355leopard_mmc_config);
+	davinci_setup_mmc(1, &dm355leopard_mmc_config);
+
 	dm355_init_spi0(BIT(0), dm355_leopard_spi_info,
 			ARRAY_SIZE(dm355_leopard_spi_info));
 }
diff --git a/arch/arm/mach-davinci/board-dm644x-evm.c b/arch/arm/mach-davinci/board-dm644x-evm.c
index b2e7f9c..9c3ce31 100644
--- a/arch/arm/mach-davinci/board-dm644x-evm.c
+++ b/arch/arm/mach-davinci/board-dm644x-evm.c
@@ -44,6 +44,7 @@
 #include <mach/mux.h>
 #include <mach/psc.h>
 #include <mach/nand.h>
+#include <mach/mmc.h>
 
 #define DM644X_EVM_PHY_MASK		(0x2)
 #define DM644X_EVM_MDIO_FREQUENCY	(2200000) /* PHY bus frequency */
@@ -545,6 +546,27 @@ static int dm6444evm_msp430_get_pins(void)
 	return (buf[3] << 8) | buf[2];
 }
 
+static int dm6444evm_mmc_get_cd(int module)
+{
+	int status = dm6444evm_msp430_get_pins();
+
+	return (status < 0) ? status : !(status & BIT(1));
+}
+
+static int dm6444evm_mmc_get_ro(int module)
+{
+	int status = dm6444evm_msp430_get_pins();
+
+	return (status < 0) ? status : status & BIT(6 + 8);
+}
+
+static struct davinci_mmc_config dm6446evm_mmc_config = {
+	.get_cd		= dm6444evm_mmc_get_cd,
+	.get_ro		= dm6444evm_mmc_get_ro,
+	.wires		= 4,
+	.version	= MMC_CTLR_VERSION_1
+};
+
 static struct i2c_board_info __initdata i2c_info[] =  {
 	{
 		I2C_BOARD_INFO("dm6446evm_msp", 0x23),
@@ -671,6 +693,8 @@ static __init void davinci_evm_init(void)
 			     ARRAY_SIZE(davinci_evm_devices));
 	evm_init_i2c();
 
+	davinci_setup_mmc(0, &dm6446evm_mmc_config);
+
 	davinci_serial_init(&uart_config);
 
 	/* Register the fixup for PHY on DaVinci */
diff --git a/arch/arm/mach-davinci/devices.c b/arch/arm/mach-davinci/devices.c
index 7fdc408..56c1931 100644
--- a/arch/arm/mach-davinci/devices.c
+++ b/arch/arm/mach-davinci/devices.c
@@ -23,8 +23,13 @@
 #include <mach/irqs.h>
 #include <mach/cputype.h>
 #include <mach/mux.h>
+#include <mach/edma.h>
+#include <mach/mmc.h>
 
 #define DAVINCI_I2C_BASE	     0x01C21000
+#define DAVINCI_MMCSD0_BASE	     0x01E10000
+#define DM355_MMCSD0_BASE	     0x01E11000
+#define DM355_MMCSD1_BASE	     0x01E00000
 
 static struct resource i2c_resources[] = {
 	{
@@ -54,6 +59,158 @@ void __init davinci_init_i2c(struct davinci_i2c_platform_data *pdata)
 	(void) platform_device_register(&davinci_i2c_device);
 }
 
+#if	defined(CONFIG_MMC_DAVINCI) || defined(CONFIG_MMC_DAVINCI_MODULE)
+
+static u64 mmcsd0_dma_mask = DMA_32BIT_MASK;
+
+static struct resource mmcsd0_resources[] = {
+	{
+		/* different on dm355 */
+		.start = DAVINCI_MMCSD0_BASE,
+		.end   = DAVINCI_MMCSD0_BASE + SZ_4K - 1,
+		.flags = IORESOURCE_MEM,
+	},
+	/* IRQs:  MMC/SD, then SDIO */
+	{
+		.start = IRQ_MMCINT,
+		.flags = IORESOURCE_IRQ,
+	}, {
+		/* different on dm355 */
+		.start = IRQ_SDIOINT,
+		.flags = IORESOURCE_IRQ,
+	},
+	/* DMA channels: RX, then TX */
+	{
+		.start = DAVINCI_DMA_MMCRXEVT,
+		.flags = IORESOURCE_DMA,
+	}, {
+		.start = DAVINCI_DMA_MMCTXEVT,
+		.flags = IORESOURCE_DMA,
+	},
+};
+
+static struct platform_device davinci_mmcsd0_device = {
+	.name = "davinci_mmc",
+	.id = 0,
+	.dev = {
+		.dma_mask = &mmcsd0_dma_mask,
+		.coherent_dma_mask = DMA_32BIT_MASK,
+	},
+	.num_resources = ARRAY_SIZE(mmcsd0_resources),
+	.resource = mmcsd0_resources,
+};
+
+static u64 mmcsd1_dma_mask = DMA_32BIT_MASK;
+
+static struct resource mmcsd1_resources[] = {
+	{
+		.start = DM355_MMCSD1_BASE,
+		.end   = DM355_MMCSD1_BASE + SZ_4K - 1,
+		.flags = IORESOURCE_MEM,
+	},
+	/* IRQs:  MMC/SD, then SDIO */
+	{
+		.start = IRQ_DM355_MMCINT1,
+		.flags = IORESOURCE_IRQ,
+	}, {
+		.start = IRQ_DM355_SDIOINT1,
+		.flags = IORESOURCE_IRQ,
+	},
+	/* DMA channels: RX, then TX */
+	{
+		.start = 30,	/* rx */
+		.flags = IORESOURCE_DMA,
+	}, {
+		.start = 31,	/* tx */
+		.flags = IORESOURCE_DMA,
+	},
+};
+
+static struct platform_device davinci_mmcsd1_device = {
+	.name = "davinci_mmc",
+	.id = 1,
+	.dev = {
+		.dma_mask = &mmcsd1_dma_mask,
+		.coherent_dma_mask = DMA_32BIT_MASK,
+	},
+	.num_resources = ARRAY_SIZE(mmcsd1_resources),
+	.resource = mmcsd1_resources,
+};
+
+
+void __init davinci_setup_mmc(int module, struct davinci_mmc_config *config)
+{
+	struct platform_device	*pdev = NULL;
+
+	if (WARN_ON(cpu_is_davinci_dm646x()))
+		return;
+
+	/* REVISIT: update PINMUX, ARM_IRQMUX, and EDMA_EVTMUX here too;
+	 * for example if MMCSD1 is used for SDIO, maybe DAT2 is unused.
+	 *
+	 * FIXME dm6441 (no MMC/SD), dm357 (one), and dm335 (two) are
+	 * not handled right here ...
+	 */
+	switch (module) {
+	case 1:
+		if (!cpu_is_davinci_dm355())
+			break;
+
+		/* REVISIT we may not need all these pins if e.g. this
+		 * is a hard-wired SDIO device...
+		 */
+		davinci_cfg_reg(DM355_SD1_CMD);
+		davinci_cfg_reg(DM355_SD1_CLK);
+		davinci_cfg_reg(DM355_SD1_DATA0);
+		davinci_cfg_reg(DM355_SD1_DATA1);
+		davinci_cfg_reg(DM355_SD1_DATA2);
+		davinci_cfg_reg(DM355_SD1_DATA3);
+
+		pdev = &davinci_mmcsd1_device;
+		break;
+	case 0:
+		if (cpu_is_davinci_dm355()) {
+			mmcsd0_resources[0].start = DM355_MMCSD0_BASE;
+			mmcsd0_resources[0].end = DM355_MMCSD0_BASE + SZ_4K - 1;
+			mmcsd0_resources[2].start = IRQ_DM355_SDIOINT0;
+
+			/* expose all 6 MMC0 signals:  CLK, CMD, DATA[0..3] */
+			davinci_cfg_reg(DM355_MMCSD0);
+
+			/* enable RX EDMA */
+			davinci_cfg_reg(DM355_EVT26_MMC0_RX);
+		}
+
+		else if (cpu_is_davinci_dm644x()) {
+			/* REVISIT: should this be in board-init code? */
+			void __iomem *base =
+				IO_ADDRESS(DAVINCI_SYSTEM_MODULE_BASE);
+
+			/* Power-on 3.3V IO cells */
+			__raw_writel(0, base + DM64XX_VDD3P3V_PWDN);
+			/*Set up the pull regiter for MMC */
+			davinci_cfg_reg(DM644X_MSTK);
+		}
+
+		pdev = &davinci_mmcsd0_device;
+		break;
+	}
+
+	if (WARN_ON(!pdev))
+		return;
+
+	pdev->dev.platform_data = config;
+	platform_device_register(pdev);
+}
+
+#else
+
+void __init davinci_setup_mmc(int module, struct davinci_mmc_config *config)
+{
+}
+
+#endif
+
 /*-------------------------------------------------------------------------*/
 
 static struct resource wdt_resources[] = {
diff --git a/arch/arm/mach-davinci/include/mach/mmc.h b/arch/arm/mach-davinci/include/mach/mmc.h
new file mode 100644
index 0000000..5a85e24
--- /dev/null
+++ b/arch/arm/mach-davinci/include/mach/mmc.h
@@ -0,0 +1,33 @@
+/*
+ *  Board-specific MMC configuration
+ */
+
+#ifndef _DAVINCI_MMC_H
+#define _DAVINCI_MMC_H
+
+#include <linux/types.h>
+#include <linux/mmc/host.h>
+
+struct davinci_mmc_config {
+	/* get_cd()/get_wp() may sleep */
+	int	(*get_cd)(int module);
+	int	(*get_ro)(int module);
+	/* wires == 0 is equivalent to wires == 4 (4-bit parallel) */
+	u8	wires;
+
+	u32     max_freq;
+
+	/* any additional host capabilities: OR'd in to mmc->f_caps */
+	u32     caps;
+
+	/* Version of the MMC/SD controller */
+	u8	version;
+};
+void davinci_setup_mmc(int module, struct davinci_mmc_config *config);
+
+enum {
+	MMC_CTLR_VERSION_1 = 0,	/* DM644x and DM355 */
+	MMC_CTLR_VERSION_2,	/* DA830 */
+};
+
+#endif