omap mmc: Add better MMC low-level init

This will simplify the MMC low-level init, and make it more
flexible to add support for a newer MMC controller in the
following patches.

The patch rearranges platform data and gets rid of slot vs
controller confusion in the old data structures. Also fix
device id numbering in the clock code.

Some code snippets are based on an earlier patch by
Russell King <linux@arm.linux.org.uk>.

Cc: Pierre Ossman <drzeus-mmc@drzeus.cx>
Signed-off-by: Tony Lindgren <tony@atomide.com>

1 files changed, 42 insertions, 8 deletions

diff --git a/arch/arm/mach-omap1/board-innovator.c b/arch/arm/mach-omap1/board-innovator.c
index a21e365a7a87..8ffb06fc0f08 100644
--- a/arch/arm/mach-omap1/board-innovator.c
+++ b/arch/arm/mach-omap1/board-innovator.c
@@ -39,6 +39,7 @@
 #include <mach/common.h>
 #include <mach/mcbsp.h>
 #include <mach/omap-alsa.h>
+#include <mach/mmc.h>
 
 static int innovator_keymap[] = {
         KEY(0, 0, KEY_F1),
@@ -360,16 +361,49 @@ static struct omap_lcd_config innovator1610_lcd_config __initdata = {
 };
 #endif
 
-static struct omap_mmc_config innovator_mmc_config __initdata = {
-        .mmc [0] = {
-                .enabled        = 1,
-                .wire4          = 1,
-                .wp_pin         = OMAP_MPUIO(3),
-                .power_pin      = -1,   /* FPGA F3 UIO42 */
-                .switch_pin     = -1,   /* FPGA F4 UIO43 */
+#if defined(CONFIG_MMC_OMAP) || defined(CONFIG_MMC_OMAP_MODULE)
+
+static int mmc_set_power(struct device *dev, int slot, int power_on,
+                                int vdd)
+{
+        if (power_on)
+                fpga_write(fpga_read(OMAP1510_FPGA_POWER) | (1 << 3),
+                                OMAP1510_FPGA_POWER);
+        else
+                fpga_write(fpga_read(OMAP1510_FPGA_POWER) & ~(1 << 3),
+                                OMAP1510_FPGA_POWER);
+
+        return 0;
+}
+
+/*
+ * Innovator could use the following functions tested:
+ * - mmc_get_wp that uses OMAP_MPUIO(3)
+ * - mmc_get_cover_state that uses FPGA F4 UIO43
+ */
+static struct omap_mmc_platform_data mmc1_data = {
+        .nr_slots                       = 1,
+        .slots[0]       = {
+                .set_power              = mmc_set_power,
+                .wire4                  = 1,
+                .name                   = "mmcblk",
         },
 };
 
+static struct omap_mmc_platform_data *mmc_data[OMAP16XX_NR_MMC];
+
+void __init innovator_mmc_init(void)
+{
+        mmc_data[0] = &mmc1_data;
+        omap1_init_mmc(mmc_data, OMAP15XX_NR_MMC);
+}
+
+#else
+static inline void innovator_mmc_init(void)
+{
+}
+#endif
+
 static struct omap_uart_config innovator_uart_config __initdata = {
         .enabled_uarts = ((1 << 0) | (1 << 1) | (1 << 2)),
 };
@@ -377,7 +411,6 @@ static struct omap_uart_config innovator_uart_config __initdata = {
 static struct omap_board_config_kernel innovator_config[] = {
         { OMAP_TAG_USB,         NULL },
         { OMAP_TAG_LCD,         NULL },
-        { OMAP_TAG_MMC,         &innovator_mmc_config },
         { OMAP_TAG_UART,        &innovator_uart_config },
 };
 
@@ -412,6 +445,7 @@ static void __init innovator_init(void)
         omap_board_config_size = ARRAY_SIZE(innovator_config);
         omap_serial_init();
         omap_register_i2c_bus(1, 100, NULL, 0);
+        innovator_mmc_init();
 }
 
 static void __init innovator_map_io(void)