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 6af3c6c863ab..087441313dd7 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 22f16f38a0ba..d4562f5ff93b 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 b2e7f9c63bc5..9c3ce311d5d7 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 7fdc408105b2..56c19319a7d2 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 000000000000..5a85e24f3673
--- /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