omap mmc: Add low-level initialization for hsmmc controller

Add low-level initialization for hsmmc controller. Merged into
this patch patch are various improvments and board support by
Grazvydas Ignotas and David Brownell.

Also change wire4 to be wires, as some newer controllers support
8 data lines.

Cc: Pierre Ossman <drzeus-mmc@drzeus.cx>
Signed-off-by: Grazvydas Ignotas <notasas@gmail.com>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Tony Lindgren <tony@atomide.com>

1 files changed, 90 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/board-omap3beagle.c b/arch/arm/mach-omap2/board-omap3beagle.c
index baa79674e9d5..9e5ada01b5fa 100644
--- a/arch/arm/mach-omap2/board-omap3beagle.c
+++ b/arch/arm/mach-omap2/board-omap3beagle.c
@@ -38,7 +38,9 @@
 #include <mach/common.h>
 #include <mach/gpmc.h>
 #include <mach/nand.h>
+#include <mach/mux.h>
 
+#include "mmc-twl4030.h"
 
 #define GPMC_CS0_BASE  0x60
 #define GPMC_CS_SIZE   0x30
@@ -103,6 +105,78 @@ static struct omap_uart_config omap3_beagle_uart_config __initdata = {
         .enabled_uarts  = ((1 << 0) | (1 << 1) | (1 << 2)),
 };
 
+static struct twl4030_hsmmc_info mmc[] = {
+        {
+                .mmc            = 1,
+                .wires          = 8,
+                .gpio_wp        = 29,
+        },
+        {}      /* Terminator */
+};
+
+static struct gpio_led gpio_leds[];
+
+static int beagle_twl_gpio_setup(struct device *dev,
+                unsigned gpio, unsigned ngpio)
+{
+        /* gpio + 0 is "mmc0_cd" (input/IRQ) */
+
+        /* REVISIT: need ehci-omap hooks for external VBUS
+         * power switch and overcurrent detect
+         */
+
+        gpio_request(gpio + 1, "EHCI_nOC");
+        gpio_direction_input(gpio + 1);
+
+        /* TWL4030_GPIO_MAX + 0 == ledA, EHCI nEN_USB_PWR (out, active low) */
+        gpio_request(gpio + TWL4030_GPIO_MAX, "nEN_USB_PWR");
+        gpio_direction_output(gpio + TWL4030_GPIO_MAX, 1);
+
+        /* TWL4030_GPIO_MAX + 1 == ledB, PMU_STAT (out, active low LED) */
+        gpio_leds[2].gpio = gpio + TWL4030_GPIO_MAX + 1;
+
+        return 0;
+}
+
+static struct twl4030_gpio_platform_data beagle_gpio_data = {
+        .gpio_base      = OMAP_MAX_GPIO_LINES,
+        .irq_base       = TWL4030_GPIO_IRQ_BASE,
+        .irq_end        = TWL4030_GPIO_IRQ_END,
+        .use_leds       = true,
+        .pullups        = BIT(1),
+        .pulldowns      = BIT(2) | BIT(6) | BIT(7) | BIT(8) | BIT(13)
+                                | BIT(15) | BIT(16) | BIT(17),
+        .setup          = beagle_twl_gpio_setup,
+};
+
+static struct twl4030_platform_data beagle_twldata = {
+        .irq_base       = TWL4030_IRQ_BASE,
+        .irq_end        = TWL4030_IRQ_END,
+
+        /* platform_data for children goes here */
+        .gpio           = &beagle_gpio_data,
+};
+
+static struct i2c_board_info __initdata beagle_i2c_boardinfo[] = {
+        {
+                I2C_BOARD_INFO("twl4030", 0x48),
+                .flags = I2C_CLIENT_WAKE,
+                .irq = INT_34XX_SYS_NIRQ,
+                .platform_data = &beagle_twldata,
+        },
+};
+
+static int __init omap3_beagle_i2c_init(void)
+{
+        omap_register_i2c_bus(1, 2600, beagle_i2c_boardinfo,
+                        ARRAY_SIZE(beagle_i2c_boardinfo));
+#ifdef CONFIG_I2C2_OMAP_BEAGLE
+        omap_register_i2c_bus(2, 400, NULL, 0);
+#endif
+        omap_register_i2c_bus(3, 400, NULL, 0);
+        return 0;
+}
+
 static void __init omap3_beagle_init_irq(void)
 {
         omap2_init_common_hw();
@@ -130,6 +204,11 @@ static struct gpio_led gpio_leds[] = {
                 .default_trigger        = "mmc0",
                 .gpio                   = 149,
         },
+        {
+                .name                   = "beagleboard::pmu_stat",
+                .gpio                   = -EINVAL,      /* gets replaced */
+                .active_low             = true,
+        },
 };
 
 static struct gpio_led_platform_data gpio_led_info = {
@@ -218,11 +297,22 @@ static void __init omap3beagle_flash_init(void)
 
 static void __init omap3_beagle_init(void)
 {
+        omap3_beagle_i2c_init();
         platform_add_devices(omap3_beagle_devices,
                         ARRAY_SIZE(omap3_beagle_devices));
         omap_board_config = omap3_beagle_config;
         omap_board_config_size = ARRAY_SIZE(omap3_beagle_config);
         omap_serial_init();
+
+        omap_cfg_reg(AH8_34XX_GPIO29);
+        mmc[0].gpio_cd = gpio + 0;
+        twl4030_mmc_init(mmc);
+
+        omap_cfg_reg(J25_34XX_GPIO170);
+        gpio_request(170, "DVI_nPD");
+        /* REVISIT leave DVI powered down until it's needed ... */
+        gpio_direction_output(170, true);
+
         omap3beagle_flash_init();
 }