diff --git a/board/nvidia/harmony/harmony.c b/board/nvidia/harmony/harmony.c
index cbb30d6..f2c3867 100644
--- a/board/nvidia/harmony/harmony.c
+++ b/board/nvidia/harmony/harmony.c
@@ -24,9 +24,11 @@
 #include <common.h>
 #include <asm/io.h>
 #include <asm/arch/tegra2.h>
+#include <asm/arch/pinmux.h>
 #ifdef CONFIG_TEGRA2_MMC
 #include <mmc.h>
 #endif
+#include "../common/board.h"
 
 /*
  * Routine: gpio_config_uart
@@ -38,6 +40,39 @@
 
 #ifdef CONFIG_TEGRA2_MMC
 /*
+ * Routine: pin_mux_mmc
+ * Description: setup the pin muxes/tristate values for the SDMMC(s)
+ */
+static void pin_mux_mmc(void)
+{
+	/* SDMMC4: config 3, x8 on 2nd set of pins */
+	pinmux_set_func(PINGRP_ATB, PMUX_FUNC_SDIO4);
+	pinmux_set_func(PINGRP_GMA, PMUX_FUNC_SDIO4);
+	pinmux_set_func(PINGRP_GME, PMUX_FUNC_SDIO4);
+
+	pinmux_tristate_disable(PINGRP_ATB);
+	pinmux_tristate_disable(PINGRP_GMA);
+	pinmux_tristate_disable(PINGRP_GME);
+
+	/* For power GPIO PI6 */
+	pinmux_tristate_disable(PINGRP_ATA);
+	/* For CD GPIO PH2 */
+	pinmux_tristate_disable(PINGRP_ATD);
+
+	/* SDMMC2: SDIO2_CLK, SDIO2_CMD, SDIO2_DAT[7:0] */
+	pinmux_set_func(PINGRP_DTA, PMUX_FUNC_SDIO2);
+	pinmux_set_func(PINGRP_DTD, PMUX_FUNC_SDIO2);
+
+	pinmux_tristate_disable(PINGRP_DTA);
+	pinmux_tristate_disable(PINGRP_DTD);
+
+	/* For power GPIO PT3 */
+	pinmux_tristate_disable(PINGRP_DTB);
+	/* For CD GPIO PI5 */
+	pinmux_tristate_disable(PINGRP_ATC);
+}
+
+/*
  * Routine: gpio_config_mmc
  * Description: Set GPIOs for SD card
  */
@@ -47,6 +82,27 @@
 }
 
 /* this is a weak define that we are overriding */
+int board_mmc_init(bd_t *bd)
+{
+	debug("board_mmc_init called\n");
+
+	/* Enable muxes, etc. for SDMMC controllers */
+	pin_mux_mmc();
+	gpio_config_mmc();
+
+	debug("board_mmc_init: init SD slot J26\n");
+	/* init dev 0, SD slot J26, with 4-bit bus */
+	/* The board has an 8-bit bus, but 8-bit doesn't work yet */
+	tegra2_mmc_init(0, 4);
+
+	debug("board_mmc_init: init SD slot J5\n");
+	/* init dev 2, SD slot J5, with 4-bit bus */
+	tegra2_mmc_init(2, 4);
+
+	return 0;
+}
+
+/* this is a weak define that we are overriding */
 int board_mmc_getcd(u8 *cd, struct mmc *mmc)
 {
 	debug("board_mmc_getcd called\n");