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>

4 files changed, 106 insertions, 221 deletions

diff --git a/arch/arm/plat-omap/devices.c b/arch/arm/plat-omap/devices.c
index 0cb2b22388e9..ac15c23fd5da 100644
--- a/arch/arm/plat-omap/devices.c
+++ b/arch/arm/plat-omap/devices.c
@@ -192,202 +192,48 @@ void omap_mcbsp_register_board_cfg(struct omap_mcbsp_platform_data *config,
 
 /*-------------------------------------------------------------------------*/
 
-#if     defined(CONFIG_MMC_OMAP) || defined(CONFIG_MMC_OMAP_MODULE) || \
+#if defined(CONFIG_MMC_OMAP) || defined(CONFIG_MMC_OMAP_MODULE) || \
         defined(CONFIG_MMC_OMAP_HS) || defined(CONFIG_MMC_OMAP_HS_MODULE)
 
-#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
-#define OMAP_MMC1_BASE          0x4809c000
-#define OMAP_MMC1_END           (OMAP_MMC1_BASE + 0x1fc)
-#define OMAP_MMC1_INT           INT_24XX_MMC_IRQ
+#define OMAP_MMC_NR_RES         2
 
-#define OMAP_MMC2_BASE          0x480b4000
-#define OMAP_MMC2_END           (OMAP_MMC2_BASE + 0x1fc)
-#define OMAP_MMC2_INT           INT_24XX_MMC2_IRQ
-
-#else
-
-#define OMAP_MMC1_BASE          0xfffb7800
-#define OMAP_MMC1_END           (OMAP_MMC1_BASE + 0x7f)
-#define OMAP_MMC1_INT           INT_MMC
-
-#define OMAP_MMC2_BASE          0xfffb7c00      /* omap16xx only */
-#define OMAP_MMC2_END           (OMAP_MMC2_BASE + 0x7f)
-#define OMAP_MMC2_INT           INT_1610_MMC2
-
-#endif
-
-static struct omap_mmc_platform_data mmc1_data;
-
-static u64 mmc1_dmamask = 0xffffffff;
-
-static struct resource mmc1_resources[] = {
-        {
-                .start          = OMAP_MMC1_BASE,
-                .end            = OMAP_MMC1_END,
-                .flags          = IORESOURCE_MEM,
-        },
-        {
-                .start          = OMAP_MMC1_INT,
-                .flags          = IORESOURCE_IRQ,
-        },
-};
-
-static struct platform_device mmc_omap_device1 = {
-        .name           = "mmci-omap",
-        .id             = 1,
-        .dev = {
-                .dma_mask       = &mmc1_dmamask,
-                .platform_data  = &mmc1_data,
-        },
-        .num_resources  = ARRAY_SIZE(mmc1_resources),
-        .resource       = mmc1_resources,
-};
-
-#if defined(CONFIG_ARCH_OMAP16XX) || defined(CONFIG_ARCH_OMAP2430) || \
-        defined(CONFIG_ARCH_OMAP34XX)
-
-static struct omap_mmc_platform_data mmc2_data;
-
-static u64 mmc2_dmamask = 0xffffffff;
-
-static struct resource mmc2_resources[] = {
-        {
-                .start          = OMAP_MMC2_BASE,
-                .end            = OMAP_MMC2_END,
-                .flags          = IORESOURCE_MEM,
-        },
-        {
-                .start          = OMAP_MMC2_INT,
-                .flags          = IORESOURCE_IRQ,
-        },
-};
-
-static struct platform_device mmc_omap_device2 = {
-        .name           = "mmci-omap",
-        .id             = 2,
-        .dev = {
-                .dma_mask       = &mmc2_dmamask,
-                .platform_data  = &mmc2_data,
-        },
-        .num_resources  = ARRAY_SIZE(mmc2_resources),
-        .resource       = mmc2_resources,
-};
-#endif
-
-static inline void omap_init_mmc_conf(const struct omap_mmc_config *mmc_conf)
-{
-        if (cpu_is_omap2430() || cpu_is_omap34xx())
-                return;
-
-        if (mmc_conf->mmc[0].enabled) {
-                if (cpu_is_omap24xx()) {
-                        omap_cfg_reg(H18_24XX_MMC_CMD);
-                        omap_cfg_reg(H15_24XX_MMC_CLKI);
-                        omap_cfg_reg(G19_24XX_MMC_CLKO);
-                        omap_cfg_reg(F20_24XX_MMC_DAT0);
-                        omap_cfg_reg(F19_24XX_MMC_DAT_DIR0);
-                        omap_cfg_reg(G18_24XX_MMC_CMD_DIR);
-                } else {
-                        omap_cfg_reg(MMC_CMD);
-                        omap_cfg_reg(MMC_CLK);
-                        omap_cfg_reg(MMC_DAT0);
-                        if (cpu_is_omap1710()) {
-                                omap_cfg_reg(M15_1710_MMC_CLKI);
-                                omap_cfg_reg(P19_1710_MMC_CMDDIR);
-                                omap_cfg_reg(P20_1710_MMC_DATDIR0);
-                        }
-                }
-                if (mmc_conf->mmc[0].wire4) {
-                        if (cpu_is_omap24xx()) {
-                                omap_cfg_reg(H14_24XX_MMC_DAT1);
-                                omap_cfg_reg(E19_24XX_MMC_DAT2);
-                                omap_cfg_reg(D19_24XX_MMC_DAT3);
-                                omap_cfg_reg(E20_24XX_MMC_DAT_DIR1);
-                                omap_cfg_reg(F18_24XX_MMC_DAT_DIR2);
-                                omap_cfg_reg(E18_24XX_MMC_DAT_DIR3);
-                        } else {
-                                omap_cfg_reg(MMC_DAT1);
-                                /* NOTE:  DAT2 can be on W10 (here) or M15 */
-                                if (!mmc_conf->mmc[0].nomux)
-                                        omap_cfg_reg(MMC_DAT2);
-                                omap_cfg_reg(MMC_DAT3);
-                        }
-                }
-        }
-
-#ifdef  CONFIG_ARCH_OMAP16XX
-        /* block 2 is on newer chips, and has many pinout options */
-        if (mmc_conf->mmc[1].enabled) {
-                if (!mmc_conf->mmc[1].nomux) {
-                        omap_cfg_reg(Y8_1610_MMC2_CMD);
-                        omap_cfg_reg(Y10_1610_MMC2_CLK);
-                        omap_cfg_reg(R18_1610_MMC2_CLKIN);
-                        omap_cfg_reg(W8_1610_MMC2_DAT0);
-                        if (mmc_conf->mmc[1].wire4) {
-                                omap_cfg_reg(V8_1610_MMC2_DAT1);
-                                omap_cfg_reg(W15_1610_MMC2_DAT2);
-                                omap_cfg_reg(R10_1610_MMC2_DAT3);
-                        }
-
-                        /* These are needed for the level shifter */
-                        omap_cfg_reg(V9_1610_MMC2_CMDDIR);
-                        omap_cfg_reg(V5_1610_MMC2_DATDIR0);
-                        omap_cfg_reg(W19_1610_MMC2_DATDIR1);
-                }
-
-                /* Feedback clock must be set on OMAP-1710 MMC2 */
-                if (cpu_is_omap1710())
-                        omap_writel(omap_readl(MOD_CONF_CTRL_1) | (1 << 24),
-                                     MOD_CONF_CTRL_1);
-        }
-#endif
-}
-
-static void __init omap_init_mmc(void)
+/*
+ * Register MMC devices. Called from mach-omap1 and mach-omap2 device init.
+ */
+int __init omap_mmc_add(int id, unsigned long base, unsigned long size,
+                unsigned int irq, struct omap_mmc_platform_data *data)
 {
-        const struct omap_mmc_config    *mmc_conf;
-
-        /* NOTE:  assumes MMC was never (wrongly) enabled */
-        mmc_conf = omap_get_config(OMAP_TAG_MMC, struct omap_mmc_config);
-        if (!mmc_conf)
-                return;
-
-        omap_init_mmc_conf(mmc_conf);
-
-        if (mmc_conf->mmc[0].enabled) {
-                mmc1_data.conf = mmc_conf->mmc[0];
-                (void) platform_device_register(&mmc_omap_device1);
-        }
-
-#if defined(CONFIG_ARCH_OMAP16XX) || defined(CONFIG_ARCH_OMAP2430) || \
-        defined(CONFIG_ARCH_OMAP34XX)
-        if (mmc_conf->mmc[1].enabled) {
-                mmc2_data.conf = mmc_conf->mmc[1];
-                (void) platform_device_register(&mmc_omap_device2);
-        }
-#endif
-}
+        struct platform_device *pdev;
+        struct resource res[OMAP_MMC_NR_RES];
+        int ret;
+
+        pdev = platform_device_alloc("mmci-omap", id);
+        if (!pdev)
+                return -ENOMEM;
+
+        memset(res, 0, OMAP_MMC_NR_RES * sizeof(struct resource));
+        res[0].start = base;
+        res[0].end = base + size - 1;
+        res[0].flags = IORESOURCE_MEM;
+        res[1].start = res[1].end = irq;
+        res[1].flags = IORESOURCE_IRQ;
+
+        ret = platform_device_add_resources(pdev, res, ARRAY_SIZE(res));
+        if (ret == 0)
+                ret = platform_device_add_data(pdev, data, sizeof(*data));
+        if (ret)
+                goto fail;
+
+        ret = platform_device_add(pdev);
+        if (ret)
+                goto fail;
+        return 0;
 
-void omap_set_mmc_info(int host, const struct omap_mmc_platform_data *info)
-{
-        switch (host) {
-        case 1:
-                mmc1_data = *info;
-                break;
-#if defined(CONFIG_ARCH_OMAP16XX) || defined(CONFIG_ARCH_OMAP2430) || \
-        defined(CONFIG_ARCH_OMAP34XX)
-        case 2:
-                mmc2_data = *info;
-                break;
-#endif
-        default:
-                BUG();
-        }
+fail:
+        platform_device_put(pdev);
+        return ret;
 }
 
-#else
-static inline void omap_init_mmc(void) {}
-void omap_set_mmc_info(int host, const struct omap_mmc_platform_data *info) {}
 #endif
 
 /*-------------------------------------------------------------------------*/
@@ -532,7 +378,6 @@ static int __init omap_init_devices(void)
          */
         omap_init_dsp();
         omap_init_kp();
-        omap_init_mmc();
         omap_init_uwire();
         omap_init_wdt();
         omap_init_rng();
diff --git a/arch/arm/plat-omap/include/mach/board-h2.h b/arch/arm/plat-omap/include/mach/board-h2.h
index 2a050e9be65f..15531c8dc0e6 100644
--- a/arch/arm/plat-omap/include/mach/board-h2.h
+++ b/arch/arm/plat-omap/include/mach/board-h2.h
@@ -29,13 +29,13 @@
 #ifndef __ASM_ARCH_OMAP_H2_H
 #define __ASM_ARCH_OMAP_H2_H
 
-/* Placeholder for H2 specific defines */
-
 /* At OMAP1610 Innovator the Ethernet is directly connected to CS1 */
 #define OMAP1610_ETHR_START             0x04000300
 
+#define H2_TPS_GPIO_BASE                (OMAP_MAX_GPIO_LINES + 16 /* MPUIO */)
+#       define H2_TPS_GPIO_MMC_PWR_EN   (H2_TPS_GPIO_BASE + 3)
+
 extern void h2_mmc_init(void);
-extern void h2_mmc_slot_cover_handler(void *arg, int state);
 
 #endif /*  __ASM_ARCH_OMAP_H2_H */
 
diff --git a/arch/arm/plat-omap/include/mach/board.h b/arch/arm/plat-omap/include/mach/board.h
index c23c12ccb353..9466772fc7c8 100644
--- a/arch/arm/plat-omap/include/mach/board.h
+++ b/arch/arm/plat-omap/include/mach/board.h
@@ -16,7 +16,6 @@
 
 /* Different peripheral ids */
 #define OMAP_TAG_CLOCK          0x4f01
-#define OMAP_TAG_MMC            0x4f02
 #define OMAP_TAG_SERIAL_CONSOLE 0x4f03
 #define OMAP_TAG_USB            0x4f04
 #define OMAP_TAG_LCD            0x4f05
@@ -35,27 +34,6 @@ struct omap_clock_config {
         u8 system_clock_type;
 };
 
-struct omap_mmc_conf {
-        unsigned enabled:1;
-        /* nomux means "standard" muxing is wrong on this board, and that
-         * board-specific code handled it before common init logic.
-         */
-        unsigned nomux:1;
-        /* switch pin can be for card detect (default) or card cover */
-        unsigned cover:1;
-        /* 4 wire signaling is optional, and is only used for SD/SDIO */
-        unsigned wire4:1;
-        /* use the internal clock */
-        unsigned internal_clock:1;
-        s16 power_pin;
-        s16 switch_pin;
-        s16 wp_pin;
-};
-
-struct omap_mmc_config {
-        struct omap_mmc_conf mmc[2];
-};
-
 struct omap_serial_console_config {
         u8 console_uart;
         u32 console_speed;
diff --git a/arch/arm/plat-omap/include/mach/mmc.h b/arch/arm/plat-omap/include/mach/mmc.h
index fc15d13058fc..0c2ef3b8956a 100644
--- a/arch/arm/plat-omap/include/mach/mmc.h
+++ b/arch/arm/plat-omap/include/mach/mmc.h
@@ -17,12 +17,28 @@
 
 #include <mach/board.h>
 
+#define OMAP15XX_NR_MMC         1
+#define OMAP16XX_NR_MMC         2
+#define OMAP1_MMC_SIZE          0x080
+#define OMAP1_MMC1_BASE         0xfffb7800
+#define OMAP1_MMC2_BASE         0xfffb7c00      /* omap16xx only */
+
+#define OMAP24XX_NR_MMC         2
+#define OMAP34XX_NR_MMC         3
+#define OMAP2420_MMC_SIZE       OMAP1_MMC_SIZE
+#define HSMMC_SIZE              0x200
+#define OMAP2_MMC1_BASE         0x4809c000
+#define OMAP2_MMC2_BASE         0x480b4000
+#define OMAP3_MMC3_BASE         0x480ad000
+#define HSMMC3                  (1 << 2)
+#define HSMMC2                  (1 << 1)
+#define HSMMC1                  (1 << 0)
+
 #define OMAP_MMC_MAX_SLOTS      2
 
 struct omap_mmc_platform_data {
-        struct omap_mmc_conf    conf;
 
-        /* number of slots on board */
+        /* number of slots per controller */
         unsigned nr_slots:2;
 
         /* set if your board has components or wiring that limits the
@@ -41,7 +57,27 @@ struct omap_mmc_platform_data {
         int (*suspend)(struct device *dev, int slot);
         int (*resume)(struct device *dev, int slot);
 
+        u64 dma_mask;
+
         struct omap_mmc_slot_data {
+
+                /*
+                 * nomux means "standard" muxing is wrong on this board, and
+                 * that board-specific code handled it before common init logic.
+                 */
+                unsigned nomux:1;
+
+                /* switch pin can be for card detect (default) or card cover */
+                unsigned cover:1;
+
+                /* 4 wire signaling is optional, and is only used for SD/SDIO */
+                unsigned wire4:1;
+
+                /* use the internal clock */
+                unsigned internal_clock:1;
+                s16 power_pin;
+                s16 switch_pin;
+
                 int (* set_bus_mode)(struct device *dev, int slot, int bus_mode);
                 int (* set_power)(struct device *dev, int slot, int power_on, int vdd);
                 int (* get_ro)(struct device *dev, int slot);
@@ -49,8 +85,8 @@ struct omap_mmc_platform_data {
                 /* return MMC cover switch state, can be NULL if not supported.
                  *
                  * possible return values:
-                 *   0 - open
-                 *   1 - closed
+                 *   0 - closed
+                 *   1 - open
                  */
                 int (* get_cover_state)(struct device *dev, int slot);
 
@@ -66,9 +102,35 @@ struct omap_mmc_platform_data {
         } slots[OMAP_MMC_MAX_SLOTS];
 };
 
-extern void omap_set_mmc_info(int host, const struct omap_mmc_platform_data *info);
-
 /* called from board-specific card detection service routine */
 extern void omap_mmc_notify_cover_event(struct device *dev, int slot, int is_closed);
 
+#if     defined(CONFIG_MMC_OMAP) || defined(CONFIG_MMC_OMAP_MODULE) || \
+        defined(CONFIG_MMC_OMAP_HS) || defined(CONFIG_MMC_OMAP_HS_MODULE)
+void omap1_init_mmc(struct omap_mmc_platform_data **mmc_data,
+                                int nr_controllers);
+void omap2_init_mmc(struct omap_mmc_platform_data **mmc_data,
+                                int nr_controllers);
+void hsmmc_init(int controller_mask);
+int omap_mmc_add(int id, unsigned long base, unsigned long size,
+                        unsigned int irq, struct omap_mmc_platform_data *data);
+#else
+static inline void omap1_init_mmc(struct omap_mmc_platform_data **mmc_data,
+                                int nr_controllers)
+{
+}
+static inline void omap2_init_mmc(struct omap_mmc_platform_data **mmc_data,
+                                int nr_controllers)
+{
+}
+static inline void hsmmc_init(int controller_mask)
+{
+}
+static inline int omap_mmc_add(int id, unsigned long base, unsigned long size,
+                unsigned int irq, struct omap_mmc_platform_data *data)
+{
+        return 0;
+}
+
+#endif
 #endif