OMAP: mmc: add support for second and third mmc channels

This patch adds support for the second and third mmc channels on OMAP3
processors

Boards wishing to use this feature should define CONFIG_SYS_MMC_SET_DEV
in the board config

Tested on Overo

Signed-off-by: Steve Sakoman <steve@sakoman.com>
Tested-by: Philip Balister <philip@opensdr.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>

arch/arm/include/asm/arch-omap3/mmc_host_def.h

@@ -29,13 +29,20 @@
 #define T2_BASE			0x48002000
 
 typedef struct t2 {
-	unsigned char res1[0x274];
+	unsigned char res1[0x274];	/* 0x000 */
 	unsigned int devconf0;		/* 0x274 */
-	unsigned char res2[0x2A8];
+	unsigned char res2[0x060];	/* 0x278 */
+	unsigned int devconf1;		/* 0x2D8 */
+	unsigned char res3[0x244];	/* 0x2DC */
 	unsigned int pbias_lite;	/* 0x520 */
 } t2_t;
 
 #define MMCSDIO1ADPCLKISEL		(1 << 24)
+#define MMCSDIO2ADPCLKISEL		(1 << 6)
+
+#define EN_MMC1				(1 << 24)
+#define EN_MMC2				(1 << 25)
+#define EN_MMC3				(1 << 30)
 
 #define PBIASLITEPWRDNZ0		(1 << 1)
 #define PBIASSPEEDCTRL0			(1 << 2)
@@ -44,7 +51,9 @@ typedef struct t2 {
 /*
  * OMAP HSMMC register definitions
  */
-#define OMAP_HSMMC_BASE		0x4809C000
+#define OMAP_HSMMC1_BASE	0x4809C000
+#define OMAP_HSMMC2_BASE	0x480B4000
+#define OMAP_HSMMC3_BASE	0x480AD000
 
 typedef struct hsmmc {
 	unsigned char res1[0x10];

drivers/mmc/omap3_mmc.c

@@ -52,7 +52,27 @@ const unsigned short mmc_transspeed_val[15][4] = {
 
 mmc_card_data cur_card_data;
 static block_dev_desc_t mmc_blk_dev;
-static hsmmc_t *mmc_base = (hsmmc_t *)OMAP_HSMMC_BASE;
+static hsmmc_t *mmc_base = (hsmmc_t *)OMAP_HSMMC1_BASE;
+
+unsigned char mmc_set_dev(int dev)
+{
+	switch (dev) {
+	case 1:
+		mmc_base = (hsmmc_t *)OMAP_HSMMC1_BASE;
+		break;
+	case 2:
+		mmc_base = (hsmmc_t *)OMAP_HSMMC2_BASE;
+		break;
+	case 3:
+		mmc_base = (hsmmc_t *)OMAP_HSMMC3_BASE;
+		break;
+	default:
+		mmc_base = (hsmmc_t *)OMAP_HSMMC1_BASE;
+		return 1;
+	}
+
+	return 0;
+}
 
 block_dev_desc_t *mmc_get_dev(int dev)
 {
@@ -62,6 +82,7 @@ block_dev_desc_t *mmc_get_dev(int dev)
 unsigned char mmc_board_init(void)
 {
 	t2_t *t2_base = (t2_t *)T2_BASE;
+	struct prcm *prcm_base = (struct prcm *)PRCM_BASE;
 
 #if defined(CONFIG_TWL4030_POWER)
 	twl4030_power_mmc_init();
@@ -74,6 +95,17 @@ unsigned char mmc_board_init(void)
 	writel(readl(&t2_base->devconf0) | MMCSDIO1ADPCLKISEL,
 		&t2_base->devconf0);
 
+	writel(readl(&t2_base->devconf1) | MMCSDIO2ADPCLKISEL,
+		&t2_base->devconf1);
+
+	writel(readl(&prcm_base->fclken1_core) |
+		EN_MMC1 | EN_MMC2 | EN_MMC3,
+		&prcm_base->fclken1_core);
+
+	writel(readl(&prcm_base->iclken1_core) |
+		EN_MMC1 | EN_MMC2 | EN_MMC3,
+		&prcm_base->iclken1_core);
+
 	return 1;
 }
 
@@ -512,8 +544,11 @@ unsigned long mmc_bread(int dev_num, unsigned long blknr, lbaint_t blkcnt,
 	return 1;
 }
 
-int mmc_legacy_init(int verbose)
+int mmc_legacy_init(int dev)
 {
+	if (mmc_set_dev(dev) != 0)
+		return 1;
+
 	if (configure_mmc(&cur_card_data) != 1)
 		return 1;