davinci: MMC platform support
Add SoC and platform-specific data and init for MMC driver.
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
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) 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[] = {