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/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 @@
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 @@
/* 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 @@
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 @@
/* 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 @@
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 @@
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) 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