MMC: add marvell sdhci driver

This could support both armada100 and pantheon serial in the mainline,
while this driver also be tested to support upcoming mg, mmp2 and mmp3
hardware.

Signed-off-by: Lei Wen <leiwen@marvell.com>
Acked-by: Andy Fleming <afleming@freescale.com>

drivers/mmc/Makefile

@@ -33,6 +33,7 @@ COBJS-$(CONFIG_GENERIC_MMC) += mmc.o
 COBJS-$(CONFIG_GENERIC_ATMEL_MCI) += gen_atmel_mci.o
 COBJS-$(CONFIG_MMC_SPI) += mmc_spi.o
 COBJS-$(CONFIG_ARM_PL180_MMCI) += arm_pl180_mmci.o
+COBJS-$(CONFIG_MV_SDHCI) += mv_sdhci.o
 COBJS-$(CONFIG_MXC_MMC) += mxcmmc.o
 COBJS-$(CONFIG_OMAP3_MMC) += omap3_mmc.o
 COBJS-$(CONFIG_OMAP_HSMMC) += omap_hsmmc.o

drivers/mmc/mv_sdhci.c

@@ -0,0 +1,21 @@
+#include <common.h>
+#include <malloc.h>
+#include <sdhci.h>
+
+static char *MVSDH_NAME = "mv_sdh";
+int mv_sdh_init(u32 regbase, u32 max_clk, u32 min_clk, u32 quirks)
+{
+	struct sdhci_host *host = NULL;
+	host = (struct sdhci_host *)malloc(sizeof(struct sdhci_host));
+	if (!host) {
+		printf("sdh_host malloc fail!\n");
+		return 1;
+	}
+
+	host->name = MVSDH_NAME;
+	host->ioaddr = (void *)regbase;
+	host->quirks = quirks;
+	host->version = sdhci_readw(host, SDHCI_HOST_VERSION);
+	add_sdhci(host, max_clk, min_clk);
+	return 0;
+}