diff --git a/arch/arm/include/asm/arch-tegra/tegra_mmc.h b/arch/arm/include/asm/arch-tegra/tegra_mmc.h
index bd18f5f..cd896a5 100644
--- a/arch/arm/include/asm/arch-tegra/tegra_mmc.h
+++ b/arch/arm/include/asm/arch-tegra/tegra_mmc.h
@@ -22,10 +22,7 @@
 #ifndef __TEGRA_MMC_H_
 #define __TEGRA_MMC_H_
 
-#define TEGRA_SDMMC1_BASE	0xC8000000
-#define TEGRA_SDMMC2_BASE	0xC8000200
-#define TEGRA_SDMMC3_BASE	0xC8000400
-#define TEGRA_SDMMC4_BASE	0xC8000600
+#include <fdtdec.h>
 
 #define MAX_HOSTS		4	/* Max number of 'hosts'/controllers */
 
@@ -64,12 +61,30 @@ struct tegra_mmc {
 	unsigned char	admaerr;	/* offset 54h */
 	unsigned char	res4[3];	/* RESERVED, offset 55h-57h */
 	unsigned long	admaaddr;	/* offset 58h-5Fh */
-	unsigned char	res5[0x9c];	/* RESERVED, offset 60h-FBh */
+	unsigned char	res5[0xa0];	/* RESERVED, offset 60h-FBh */
 	unsigned short	slotintstatus;	/* offset FCh */
 	unsigned short	hcver;		/* HOST Version */
-	unsigned char	res6[0x100];	/* RESERVED, offset 100h-1FFh */
+	unsigned int	venclkctl;	/* _VENDOR_CLOCK_CNTRL_0,    100h */
+	unsigned int	venspictl;	/* _VENDOR_SPI_CNTRL_0,      104h */
+	unsigned int	venspiintsts;	/* _VENDOR_SPI_INT_STATUS_0, 108h */
+	unsigned int	venceatactl;	/* _VENDOR_CEATA_CNTRL_0,    10Ch */
+	unsigned int	venbootctl;	/* _VENDOR_BOOT_CNTRL_0,     110h */
+	unsigned int	venbootacktout;	/* _VENDOR_BOOT_ACK_TIMEOUT, 114h */
+	unsigned int	venbootdattout;	/* _VENDOR_BOOT_DAT_TIMEOUT, 118h */
+	unsigned int	vendebouncecnt;	/* _VENDOR_DEBOUNCE_COUNT_0, 11Ch */
+	unsigned int	venmiscctl;	/* _VENDOR_MISC_CNTRL_0,     120h */
+	unsigned int	res6[47];	/* 0x124 ~ 0x1DC */
+	unsigned int	sdmemcmppadctl;	/* _SDMEMCOMPPADCTRL_0,      1E0h */
+	unsigned int	autocalcfg;	/* _AUTO_CAL_CONFIG_0,       1E4h */
+	unsigned int	autocalintval;	/* _AUTO_CAL_INTERVAL_0,     1E8h */
+	unsigned int	autocalsts;	/* _AUTO_CAL_STATUS_0,       1ECh */
 };
 
+#define TEGRA_MMC_PWRCTL_SD_BUS_POWER				(1 << 0)
+#define TEGRA_MMC_PWRCTL_SD_BUS_VOLTAGE_V1_8			(5 << 1)
+#define TEGRA_MMC_PWRCTL_SD_BUS_VOLTAGE_V3_0			(6 << 1)
+#define TEGRA_MMC_PWRCTL_SD_BUS_VOLTAGE_V3_3			(7 << 1)
+
 #define TEGRA_MMC_HOSTCTL_DMASEL_MASK				(3 << 3)
 #define TEGRA_MMC_HOSTCTL_DMASEL_SDMA				(0 << 3)
 #define TEGRA_MMC_HOSTCTL_DMASEL_ADMA2_32BIT			(2 << 3)
@@ -119,6 +134,14 @@ struct tegra_mmc {
 
 #define TEGRA_MMC_NORINTSIGEN_XFER_COMPLETE			(1 << 1)
 
+/* SDMMC1/3 settings from section 24.6 of T30 TRM */
+#define MEMCOMP_PADCTRL_VREF	7
+#define AUTO_CAL_ENABLED	(1 << 29)
+#define AUTO_CAL_PD_OFFSET	(0x70 << 8)
+#define AUTO_CAL_PU_OFFSET	(0x62 << 0)
+
+void pad_init_mmc(struct tegra_mmc *reg);
+
 struct mmc_host {
 	struct tegra_mmc *reg;
 	int id;			/* device id/number, 0-3 */
diff --git a/arch/arm/include/asm/arch-tegra20/tegra.h b/arch/arm/include/asm/arch-tegra20/tegra.h
index ad5c01d..ba0084e 100644
--- a/arch/arm/include/asm/arch-tegra20/tegra.h
+++ b/arch/arm/include/asm/arch-tegra20/tegra.h
@@ -30,6 +30,11 @@
 
 #define TEGRA_USB1_BASE		0xC5000000
 
+#define TEGRA_SDMMC1_BASE	0xC8000000
+#define TEGRA_SDMMC2_BASE	0xC8000200
+#define TEGRA_SDMMC3_BASE	0xC8000400
+#define TEGRA_SDMMC4_BASE	0xC8000600
+
 #define BCT_ODMDATA_OFFSET	4068	/* 12 bytes from end of BCT */
 
 #define MAX_NUM_CPU		2
diff --git a/arch/arm/include/asm/arch-tegra30/gp_padctrl.h b/arch/arm/include/asm/arch-tegra30/gp_padctrl.h
index 9b383d0..48b9a3b 100644
--- a/arch/arm/include/asm/arch-tegra30/gp_padctrl.h
+++ b/arch/arm/include/asm/arch-tegra30/gp_padctrl.h
@@ -56,4 +56,10 @@ struct apb_misc_gp_ctlr {
 	u32	sdio1cfg;	/* 0xEC: APB_MISC_GP_SDIO1CFGPADCTRL */
 };
 
+/* SDMMC1/3 settings from section 24.6 of T30 TRM */
+#define GP_SDIOCFG_DRVUP_SLWF	(1 << 30)
+#define GP_SDIOCFG_DRVDN_SLWR	(1 << 28)
+#define GP_SDIOCFG_DRVUP	(0x2E << 20)
+#define GP_SDIOCFG_DRVDN	(0x2A << 12)
+
 #endif	/* _TEGRA30_GP_PADCTRL_H_ */
diff --git a/arch/arm/include/asm/arch-tegra30/tegra.h b/arch/arm/include/asm/arch-tegra30/tegra.h
index c02c5d8..b33ea79 100644
--- a/arch/arm/include/asm/arch-tegra30/tegra.h
+++ b/arch/arm/include/asm/arch-tegra30/tegra.h
@@ -23,6 +23,11 @@
 
 #define TEGRA_USB1_BASE		0x7D000000
 
+#define TEGRA_SDMMC1_BASE	0x78000000
+#define TEGRA_SDMMC2_BASE	0x78000200
+#define TEGRA_SDMMC3_BASE	0x78000400
+#define TEGRA_SDMMC4_BASE	0x78000600
+
 #define BCT_ODMDATA_OFFSET	6116	/* 12 bytes from end of BCT */
 
 #define MAX_NUM_CPU		4
