davinci: MMC platform support

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

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

1 files changed, 157 insertions, 0 deletions

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[] = {