mmc: rmobile: Add SDHC support for Renesas rmobile ARM SoC

This adds Renesas rmobile ARM SoC's SD/MMC host support.
This drivers tested with Gose board and Koelsch board.

Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Acked-by: Pantelis Antoniou <panto@antoniou-consulting.com>

1 files changed, 695 insertions, 0 deletions

diff --git a/drivers/mmc/sh_sdhi.c b/drivers/mmc/sh_sdhi.c
new file mode 100644
index 0000000..cc62c89
--- /dev/null
+++ b/drivers/mmc/sh_sdhi.c
@@ -0,0 +1,695 @@
+/*
+ * drivers/mmc/sh_sdhi.c
+ *
+ * SD/MMC driver for Renesas rmobile ARM SoCs.
+ *
+ * Copyright (C) 2011,2013-2014 Renesas Electronics Corporation
+ * Copyright (C) 2014 Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
+ * Copyright (C) 2008-2009 Renesas Solutions Corp.
+ *
+ * SPDX-License-Identifier:	GPL-2.0
+ */
+
+#include <common.h>
+#include <malloc.h>
+#include <mmc.h>
+#include <asm/errno.h>
+#include <asm/io.h>
+#include <asm/arch/rmobile.h>
+#include <asm/arch/sh_sdhi.h>
+
+#define DRIVER_NAME "sh-sdhi"
+
+struct sh_sdhi_host {
+	unsigned long addr;
+	int ch;
+	int bus_shift;
+	unsigned long quirks;
+	unsigned char wait_int;
+	unsigned char sd_error;
+	unsigned char detect_waiting;
+};
+static inline void sh_sdhi_writew(struct sh_sdhi_host *host, int reg, u16 val)
+{
+	writew(val, host->addr + (reg << host->bus_shift));
+}
+
+static inline u16 sh_sdhi_readw(struct sh_sdhi_host *host, int reg)
+{
+	return readw(host->addr + (reg << host->bus_shift));
+}
+
+static void *mmc_priv(struct mmc *mmc)
+{
+	return (void *)mmc->priv;
+}
+
+static void sh_sdhi_detect(struct sh_sdhi_host *host)
+{
+	sh_sdhi_writew(host, SDHI_OPTION,
+		       OPT_BUS_WIDTH_1 | sh_sdhi_readw(host, SDHI_OPTION));
+
+	host->detect_waiting = 0;
+}
+
+static int sh_sdhi_intr(void *dev_id)
+{
+	struct sh_sdhi_host *host = dev_id;
+	int state1 = 0, state2 = 0;
+
+	state1 = sh_sdhi_readw(host, SDHI_INFO1);
+	state2 = sh_sdhi_readw(host, SDHI_INFO2);
+
+	debug("%s: state1 = %x, state2 = %x\n", __func__, state1, state2);
+
+	/* CARD Insert */
+	if (state1 & INFO1_CARD_IN) {
+		sh_sdhi_writew(host, SDHI_INFO1, ~INFO1_CARD_IN);
+		if (!host->detect_waiting) {
+			host->detect_waiting = 1;
+			sh_sdhi_detect(host);
+		}
+		sh_sdhi_writew(host, SDHI_INFO1_MASK, INFO1M_RESP_END |
+			       INFO1M_ACCESS_END | INFO1M_CARD_IN |
+			       INFO1M_DATA3_CARD_RE | INFO1M_DATA3_CARD_IN);
+		return -EAGAIN;
+	}
+	/* CARD Removal */
+	if (state1 & INFO1_CARD_RE) {
+		sh_sdhi_writew(host, SDHI_INFO1, ~INFO1_CARD_RE);
+		if (!host->detect_waiting) {
+			host->detect_waiting = 1;
+			sh_sdhi_detect(host);
+		}
+		sh_sdhi_writew(host, SDHI_INFO1_MASK, INFO1M_RESP_END |
+			       INFO1M_ACCESS_END | INFO1M_CARD_RE |
+			       INFO1M_DATA3_CARD_RE | INFO1M_DATA3_CARD_IN);
+		sh_sdhi_writew(host, SDHI_SDIO_INFO1_MASK, SDIO_INFO1M_ON);
+		sh_sdhi_writew(host, SDHI_SDIO_MODE, SDIO_MODE_OFF);
+		return -EAGAIN;
+	}
+
+	if (state2 & INFO2_ALL_ERR) {
+		sh_sdhi_writew(host, SDHI_INFO2,
+			       (unsigned short)~(INFO2_ALL_ERR));
+		sh_sdhi_writew(host, SDHI_INFO2_MASK,
+			       INFO2M_ALL_ERR |
+			       sh_sdhi_readw(host, SDHI_INFO2_MASK));
+		host->sd_error = 1;
+		host->wait_int = 1;
+		return 0;
+	}
+	/* Respons End */
+	if (state1 & INFO1_RESP_END) {
+		sh_sdhi_writew(host, SDHI_INFO1, ~INFO1_RESP_END);
+		sh_sdhi_writew(host, SDHI_INFO1_MASK,
+			       INFO1M_RESP_END |
+			       sh_sdhi_readw(host, SDHI_INFO1_MASK));
+		host->wait_int = 1;
+		return 0;
+	}
+	/* SD_BUF Read Enable */
+	if (state2 & INFO2_BRE_ENABLE) {
+		sh_sdhi_writew(host, SDHI_INFO2, ~INFO2_BRE_ENABLE);
+		sh_sdhi_writew(host, SDHI_INFO2_MASK,
+			       INFO2M_BRE_ENABLE | INFO2M_BUF_ILL_READ |
+			       sh_sdhi_readw(host, SDHI_INFO2_MASK));
+		host->wait_int = 1;
+		return 0;
+	}
+	/* SD_BUF Write Enable */
+	if (state2 & INFO2_BWE_ENABLE) {
+		sh_sdhi_writew(host, SDHI_INFO2, ~INFO2_BWE_ENABLE);
+		sh_sdhi_writew(host, SDHI_INFO2_MASK,
+			       INFO2_BWE_ENABLE | INFO2M_BUF_ILL_WRITE |
+			       sh_sdhi_readw(host, SDHI_INFO2_MASK));
+		host->wait_int = 1;
+		return 0;
+	}
+	/* Access End */
+	if (state1 & INFO1_ACCESS_END) {
+		sh_sdhi_writew(host, SDHI_INFO1, ~INFO1_ACCESS_END);
+		sh_sdhi_writew(host, SDHI_INFO1_MASK,
+			       INFO1_ACCESS_END |
+			       sh_sdhi_readw(host, SDHI_INFO1_MASK));
+		host->wait_int = 1;
+		return 0;
+	}
+	return -EAGAIN;
+}
+
+static int sh_sdhi_wait_interrupt_flag(struct sh_sdhi_host *host)
+{
+	int timeout = 10000000;
+
+	while (1) {
+		timeout--;
+		if (timeout < 0) {
+			debug(DRIVER_NAME": %s timeout\n", __func__);
+			return 0;
+		}
+
+		if (!sh_sdhi_intr(host))
+			break;
+
+		udelay(1);	/* 1 usec */
+	}
+
+	return 1; /* Return value: NOT 0 = complete waiting */
+}
+
+static int sh_sdhi_clock_control(struct sh_sdhi_host *host, unsigned long clk)
+{
+	u32 clkdiv, i, timeout;
+
+	if (sh_sdhi_readw(host, SDHI_INFO2) & (1 << 14)) {
+		printf(DRIVER_NAME": Busy state ! Cannot change the clock\n");
+		return -EBUSY;
+	}
+
+	sh_sdhi_writew(host, SDHI_CLK_CTRL,
+		       ~CLK_ENABLE & sh_sdhi_readw(host, SDHI_CLK_CTRL));
+
+	if (clk == 0)
+		return -EIO;
+
+	clkdiv = 0x80;
+	i = CONFIG_SH_SDHI_FREQ >> (0x8 + 1);
+	for (; clkdiv && clk >= (i << 1); (clkdiv >>= 1))
+		i <<= 1;
+
+	sh_sdhi_writew(host, SDHI_CLK_CTRL, clkdiv);
+
+	timeout = 100000;
+	/* Waiting for SD Bus busy to be cleared */
+	while (timeout--) {
+		if ((sh_sdhi_readw(host, SDHI_INFO2) & 0x2000))
+			break;
+	}
+
+	if (timeout)
+		sh_sdhi_writew(host, SDHI_CLK_CTRL,
+			       CLK_ENABLE | sh_sdhi_readw(host, SDHI_CLK_CTRL));
+	else
+		return -EBUSY;
+
+	return 0;
+}
+
+static int sh_sdhi_sync_reset(struct sh_sdhi_host *host)
+{
+	u32 timeout;
+	sh_sdhi_writew(host, SDHI_SOFT_RST, SOFT_RST_ON);
+	sh_sdhi_writew(host, SDHI_SOFT_RST, SOFT_RST_OFF);
+	sh_sdhi_writew(host, SDHI_CLK_CTRL,
+		       CLK_ENABLE | sh_sdhi_readw(host, SDHI_CLK_CTRL));
+
+	timeout = 100000;
+	while (timeout--) {
+		if (!(sh_sdhi_readw(host, SDHI_INFO2) & INFO2_CBUSY))
+			break;
+		udelay(100);
+	}
+
+	if (!timeout)
+		return -EBUSY;
+
+	if (host->quirks & SH_SDHI_QUIRK_16BIT_BUF)
+		sh_sdhi_writew(host, SDHI_HOST_MODE, 1);
+
+	return 0;
+}
+
+static int sh_sdhi_error_manage(struct sh_sdhi_host *host)
+{
+	unsigned short e_state1, e_state2;
+	int ret;
+
+	host->sd_error = 0;
+	host->wait_int = 0;
+
+	e_state1 = sh_sdhi_readw(host, SDHI_ERR_STS1);
+	e_state2 = sh_sdhi_readw(host, SDHI_ERR_STS2);
+	if (e_state2 & ERR_STS2_SYS_ERROR) {
+		if (e_state2 & ERR_STS2_RES_STOP_TIMEOUT)
+			ret = TIMEOUT;
+		else
+			ret = -EILSEQ;
+		debug("%s: ERR_STS2 = %04x\n",
+		      DRIVER_NAME, sh_sdhi_readw(host, SDHI_ERR_STS2));
+		sh_sdhi_sync_reset(host);
+
+		sh_sdhi_writew(host, SDHI_INFO1_MASK,
+			       INFO1M_DATA3_CARD_RE | INFO1M_DATA3_CARD_IN);
+		return ret;
+	}
+	if (e_state1 & ERR_STS1_CRC_ERROR || e_state1 & ERR_STS1_CMD_ERROR)
+		ret = -EILSEQ;
+	else
+		ret = TIMEOUT;
+
+	debug("%s: ERR_STS1 = %04x\n",
+	      DRIVER_NAME, sh_sdhi_readw(host, SDHI_ERR_STS1));
+	sh_sdhi_sync_reset(host);
+	sh_sdhi_writew(host, SDHI_INFO1_MASK,
+		       INFO1M_DATA3_CARD_RE | INFO1M_DATA3_CARD_IN);
+	return ret;
+}
+
+static int sh_sdhi_single_read(struct sh_sdhi_host *host, struct mmc_data *data)
+{
+	long time;
+	unsigned short blocksize, i;
+	unsigned short *p = (unsigned short *)data->dest;
+
+	if ((unsigned long)p & 0x00000001) {
+		debug(DRIVER_NAME": %s: The data pointer is unaligned.",
+		      __func__);
+		return -EIO;
+	}
+
+	host->wait_int = 0;
+	sh_sdhi_writew(host, SDHI_INFO2_MASK,
+		       ~(INFO2M_BRE_ENABLE | INFO2M_BUF_ILL_READ) &
+		       sh_sdhi_readw(host, SDHI_INFO2_MASK));
+	sh_sdhi_writew(host, SDHI_INFO1_MASK,
+		       ~INFO1M_ACCESS_END &
+		       sh_sdhi_readw(host, SDHI_INFO1_MASK));
+	time = sh_sdhi_wait_interrupt_flag(host);
+	if (time == 0 || host->sd_error != 0)
+		return sh_sdhi_error_manage(host);
+
+	host->wait_int = 0;
+	blocksize = sh_sdhi_readw(host, SDHI_SIZE);
+	for (i = 0; i < blocksize / 2; i++)
+		*p++ = sh_sdhi_readw(host, SDHI_BUF0);
+
+	time = sh_sdhi_wait_interrupt_flag(host);
+	if (time == 0 || host->sd_error != 0)
+		return sh_sdhi_error_manage(host);
+
+	host->wait_int = 0;
+	return 0;
+}
+
+static int sh_sdhi_multi_read(struct sh_sdhi_host *host, struct mmc_data *data)
+{
+	long time;
+	unsigned short blocksize, i, sec;
+	unsigned short *p = (unsigned short *)data->dest;
+
+	if ((unsigned long)p & 0x00000001) {
+		debug(DRIVER_NAME": %s: The data pointer is unaligned.",
+		      __func__);
+		return -EIO;
+	}
+
+	debug("%s: blocks = %d, blocksize = %d\n",
+	      __func__, data->blocks, data->blocksize);
+
+	host->wait_int = 0;
+	for (sec = 0; sec < data->blocks; sec++) {
+		sh_sdhi_writew(host, SDHI_INFO2_MASK,
+			       ~(INFO2M_BRE_ENABLE | INFO2M_BUF_ILL_READ) &
+			       sh_sdhi_readw(host, SDHI_INFO2_MASK));
+
+		time = sh_sdhi_wait_interrupt_flag(host);
+		if (time == 0 || host->sd_error != 0)
+			return sh_sdhi_error_manage(host);
+
+		host->wait_int = 0;
+		blocksize = sh_sdhi_readw(host, SDHI_SIZE);
+		for (i = 0; i < blocksize / 2; i++)
+			*p++ = sh_sdhi_readw(host, SDHI_BUF0);
+	}
+
+	return 0;
+}
+
+static int sh_sdhi_single_write(struct sh_sdhi_host *host,
+		struct mmc_data *data)
+{
+	long time;
+	unsigned short blocksize, i;
+	const unsigned short *p = (const unsigned short *)data->src;
+
+	if ((unsigned long)p & 0x00000001) {
+		debug(DRIVER_NAME": %s: The data pointer is unaligned.",
+		      __func__);
+		return -EIO;
+	}
+
+	debug("%s: blocks = %d, blocksize = %d\n",
+	      __func__, data->blocks, data->blocksize);
+
+	host->wait_int = 0;
+	sh_sdhi_writew(host, SDHI_INFO2_MASK,
+		       ~(INFO2M_BWE_ENABLE | INFO2M_BUF_ILL_WRITE) &
+		       sh_sdhi_readw(host, SDHI_INFO2_MASK));
+	sh_sdhi_writew(host, SDHI_INFO1_MASK,
+		       ~INFO1M_ACCESS_END &
+		       sh_sdhi_readw(host, SDHI_INFO1_MASK));
+
+	time = sh_sdhi_wait_interrupt_flag(host);
+	if (time == 0 || host->sd_error != 0)
+		return sh_sdhi_error_manage(host);
+
+	host->wait_int = 0;
+	blocksize = sh_sdhi_readw(host, SDHI_SIZE);
+	for (i = 0; i < blocksize / 2; i++)
+		sh_sdhi_writew(host, SDHI_BUF0, *p++);
+
+	time = sh_sdhi_wait_interrupt_flag(host);
+	if (time == 0 || host->sd_error != 0)
+		return sh_sdhi_error_manage(host);
+
+	host->wait_int = 0;
+	return 0;
+}
+
+static int sh_sdhi_multi_write(struct sh_sdhi_host *host, struct mmc_data *data)
+{
+	long time;
+	unsigned short i, sec, blocksize;
+	const unsigned short *p = (const unsigned short *)data->src;
+
+	debug("%s: blocks = %d, blocksize = %d\n",
+	      __func__, data->blocks, data->blocksize);
+
+	host->wait_int = 0;
+	for (sec = 0; sec < data->blocks; sec++) {
+		sh_sdhi_writew(host, SDHI_INFO2_MASK,
+			       ~(INFO2M_BWE_ENABLE | INFO2M_BUF_ILL_WRITE) &
+			       sh_sdhi_readw(host, SDHI_INFO2_MASK));
+
+		time = sh_sdhi_wait_interrupt_flag(host);
+		if (time == 0 || host->sd_error != 0)
+			return sh_sdhi_error_manage(host);
+
+		host->wait_int = 0;
+		blocksize = sh_sdhi_readw(host, SDHI_SIZE);
+		for (i = 0; i < blocksize / 2; i++)
+			sh_sdhi_writew(host, SDHI_BUF0, *p++);
+	}
+
+	return 0;
+}
+
+static void sh_sdhi_get_response(struct sh_sdhi_host *host, struct mmc_cmd *cmd)
+{
+	unsigned short i, j, cnt = 1;
+	unsigned short resp[8];
+	unsigned long *p1, *p2;
+
+	if (cmd->resp_type & MMC_RSP_136) {
+		cnt = 4;
+		resp[0] = sh_sdhi_readw(host, SDHI_RSP00);
+		resp[1] = sh_sdhi_readw(host, SDHI_RSP01);
+		resp[2] = sh_sdhi_readw(host, SDHI_RSP02);
+		resp[3] = sh_sdhi_readw(host, SDHI_RSP03);
+		resp[4] = sh_sdhi_readw(host, SDHI_RSP04);
+		resp[5] = sh_sdhi_readw(host, SDHI_RSP05);
+		resp[6] = sh_sdhi_readw(host, SDHI_RSP06);
+		resp[7] = sh_sdhi_readw(host, SDHI_RSP07);
+
+		/* SDHI REGISTER SPECIFICATION */
+		for (i = 7, j = 6; i > 0; i--) {
+			resp[i] = (resp[i] << 8) & 0xff00;
+			resp[i] |= (resp[j--] >> 8) & 0x00ff;
+		}
+		resp[0] = (resp[0] << 8) & 0xff00;
+
+		/* SDHI REGISTER SPECIFICATION */
+		p1 = ((unsigned long *)resp) + 3;
+
+	} else {
+		resp[0] = sh_sdhi_readw(host, SDHI_RSP00);
+		resp[1] = sh_sdhi_readw(host, SDHI_RSP01);
+
+		p1 = ((unsigned long *)resp);
+	}
+
+	p2 = (unsigned long *)cmd->response;
+#if defined(__BIG_ENDIAN_BITFIELD)
+	for (i = 0; i < cnt; i++) {
+		*p2++ = ((*p1 >> 16) & 0x0000ffff) |
+				((*p1 << 16) & 0xffff0000);
+		p1--;
+	}
+#else
+	for (i = 0; i < cnt; i++)
+		*p2++ = *p1--;
+#endif /* __BIG_ENDIAN_BITFIELD */
+}
+
+static unsigned short sh_sdhi_set_cmd(struct sh_sdhi_host *host,
+			struct mmc_data *data, unsigned short opc)
+{
+	switch (opc) {
+	case SD_CMD_APP_SEND_OP_COND:
+	case SD_CMD_APP_SEND_SCR:
+		opc |= SDHI_APP;
+		break;
+	case SD_CMD_APP_SET_BUS_WIDTH:
+		 /* SD_APP_SET_BUS_WIDTH*/
+		if (!data)
+			opc |= SDHI_APP;
+		else /* SD_SWITCH */
+			opc = SDHI_SD_SWITCH;
+		break;
+	default:
+		break;
+	}
+	return opc;
+}
+
+static unsigned short sh_sdhi_data_trans(struct sh_sdhi_host *host,
+			struct mmc_data *data, unsigned short opc)
+{
+	unsigned short ret;
+
+	switch (opc) {
+	case MMC_CMD_READ_MULTIPLE_BLOCK:
+		ret = sh_sdhi_multi_read(host, data);
+		break;
+	case MMC_CMD_WRITE_MULTIPLE_BLOCK:
+		ret = sh_sdhi_multi_write(host, data);
+		break;
+	case MMC_CMD_WRITE_SINGLE_BLOCK:
+		ret = sh_sdhi_single_write(host, data);
+		break;
+	case MMC_CMD_READ_SINGLE_BLOCK:
+	case SDHI_SD_APP_SEND_SCR:
+	case SDHI_SD_SWITCH: /* SD_SWITCH */
+		ret = sh_sdhi_single_read(host, data);
+		break;
+	default:
+		printf(DRIVER_NAME": SD: NOT SUPPORT CMD = d'%04d\n", opc);
+		ret = -EINVAL;
+		break;
+	}
+	return ret;
+}
+
+static int sh_sdhi_start_cmd(struct sh_sdhi_host *host,
+			struct mmc_data *data, struct mmc_cmd *cmd)
+{
+	long time;
+	unsigned short opc = cmd->cmdidx;
+	int ret = 0;
+	unsigned long timeout;
+
+	debug("opc = %d, arg = %x, resp_type = %x\n",
+	      opc, cmd->cmdarg, cmd->resp_type);
+
+	if (opc == MMC_CMD_STOP_TRANSMISSION) {
+		/* SDHI sends the STOP command automatically by STOP reg */
+		sh_sdhi_writew(host, SDHI_INFO1_MASK, ~INFO1M_ACCESS_END &
+			       sh_sdhi_readw(host, SDHI_INFO1_MASK));
+
+		time = sh_sdhi_wait_interrupt_flag(host);
+		if (time == 0 || host->sd_error != 0)
+			return sh_sdhi_error_manage(host);
+
+		sh_sdhi_get_response(host, cmd);
+		return 0;
+	}
+
+	if (data) {
+		if ((opc == MMC_CMD_READ_MULTIPLE_BLOCK) ||
+		    opc == MMC_CMD_WRITE_MULTIPLE_BLOCK) {
+			sh_sdhi_writew(host, SDHI_STOP, STOP_SEC_ENABLE);
+			sh_sdhi_writew(host, SDHI_SECCNT, data->blocks);
+		}
+		sh_sdhi_writew(host, SDHI_SIZE, data->blocksize);
+	}
+	opc = sh_sdhi_set_cmd(host, data, opc);
+
+	/*
+	 *  U-boot cannot use interrupt.
+	 *  So this flag may not be clear by timing
+	 */
+	sh_sdhi_writew(host, SDHI_INFO1, ~INFO1_RESP_END);
+
+	sh_sdhi_writew(host, SDHI_INFO1_MASK,
+		       INFO1M_RESP_END | sh_sdhi_readw(host, SDHI_INFO1_MASK));
+	sh_sdhi_writew(host, SDHI_ARG0,
+		       (unsigned short)(cmd->cmdarg & ARG0_MASK));
+	sh_sdhi_writew(host, SDHI_ARG1,
+		       (unsigned short)((cmd->cmdarg >> 16) & ARG1_MASK));
+
+	timeout = 100000;
+	/* Waiting for SD Bus busy to be cleared */
+	while (timeout--) {
+		if ((sh_sdhi_readw(host, SDHI_INFO2) & 0x2000))
+			break;
+	}
+
+	sh_sdhi_writew(host, SDHI_CMD, (unsigned short)(opc & CMD_MASK));
+
+	host->wait_int = 0;
+	sh_sdhi_writew(host, SDHI_INFO1_MASK,
+		       ~INFO1M_RESP_END & sh_sdhi_readw(host, SDHI_INFO1_MASK));
+	sh_sdhi_writew(host, SDHI_INFO2_MASK,
+		       ~(INFO2M_CMD_ERROR | INFO2M_CRC_ERROR |
+		       INFO2M_END_ERROR | INFO2M_TIMEOUT |
+		       INFO2M_RESP_TIMEOUT | INFO2M_ILA) &
+		       sh_sdhi_readw(host, SDHI_INFO2_MASK));
+
+	time = sh_sdhi_wait_interrupt_flag(host);
+	if (!time)
+		return sh_sdhi_error_manage(host);
+
+	if (host->sd_error) {
+		switch (cmd->cmdidx) {
+		case MMC_CMD_ALL_SEND_CID:
+		case MMC_CMD_SELECT_CARD:
+		case SD_CMD_SEND_IF_COND:
+		case MMC_CMD_APP_CMD:
+			ret = TIMEOUT;
+			break;
+		default:
+			debug(DRIVER_NAME": Cmd(d'%d) err\n", opc);
+			debug(DRIVER_NAME": cmdidx = %d\n", cmd->cmdidx);
+			ret = sh_sdhi_error_manage(host);
+			break;
+		}
+		host->sd_error = 0;
+		host->wait_int = 0;
+		return ret;
+	}
+	if (sh_sdhi_readw(host, SDHI_INFO1) & INFO1_RESP_END)
+		return -EINVAL;
+
+	if (host->wait_int) {
+		sh_sdhi_get_response(host, cmd);
+		host->wait_int = 0;
+	}
+	if (data)
+		ret = sh_sdhi_data_trans(host, data, opc);
+
+	debug("ret = %d, resp = %08x, %08x, %08x, %08x\n",
+	      ret, cmd->response[0], cmd->response[1],
+	      cmd->response[2], cmd->response[3]);
+	return ret;
+}
+
+static int sh_sdhi_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd,
+			struct mmc_data *data)
+{
+	struct sh_sdhi_host *host = mmc_priv(mmc);
+	int ret;
+
+	host->sd_error = 0;
+
+	ret = sh_sdhi_start_cmd(host, data, cmd);
+
+	return ret;
+}
+
+static void sh_sdhi_set_ios(struct mmc *mmc)
+{
+	int ret;
+	struct sh_sdhi_host *host = mmc_priv(mmc);
+
+	ret = sh_sdhi_clock_control(host, mmc->clock);
+	if (ret)
+		return;
+
+	if (mmc->bus_width == 4)
+		sh_sdhi_writew(host, SDHI_OPTION, ~OPT_BUS_WIDTH_1 &
+			       sh_sdhi_readw(host, SDHI_OPTION));
+	else
+		sh_sdhi_writew(host, SDHI_OPTION, OPT_BUS_WIDTH_1 |
+			       sh_sdhi_readw(host, SDHI_OPTION));
+
+	debug("clock = %d, buswidth = %d\n", mmc->clock, mmc->bus_width);
+}
+
+static int sh_sdhi_initialize(struct mmc *mmc)
+{
+	struct sh_sdhi_host *host = mmc_priv(mmc);
+	int ret = sh_sdhi_sync_reset(host);
+
+	sh_sdhi_writew(host, SDHI_PORTSEL, USE_1PORT);
+
+#if defined(__BIG_ENDIAN_BITFIELD)
+	sh_sdhi_writew(host, SDHI_EXT_SWAP, SET_SWAP);
+#endif
+
+	sh_sdhi_writew(host, SDHI_INFO1_MASK, INFO1M_RESP_END |
+		       INFO1M_ACCESS_END | INFO1M_CARD_RE |
+		       INFO1M_DATA3_CARD_RE | INFO1M_DATA3_CARD_IN);
+
+	return ret;
+}
+
+static const struct mmc_ops sh_sdhi_ops = {
+	.send_cmd       = sh_sdhi_send_cmd,
+	.set_ios        = sh_sdhi_set_ios,
+	.init           = sh_sdhi_initialize,
+};
+
+static struct mmc_config sh_sdhi_cfg = {
+	.name           = DRIVER_NAME,
+	.ops            = &sh_sdhi_ops,
+	.f_min          = CLKDEV_INIT,
+	.f_max          = CLKDEV_HS_DATA,
+	.voltages       = MMC_VDD_32_33 | MMC_VDD_33_34,
+	.host_caps      = MMC_MODE_4BIT | MMC_MODE_HS,
+	.part_type      = PART_TYPE_DOS,
+	.b_max          = CONFIG_SYS_MMC_MAX_BLK_COUNT,
+};
+
+int sh_sdhi_init(unsigned long addr, int ch, unsigned long quirks)
+{
+	int ret = 0;
+	struct mmc *mmc;
+	struct sh_sdhi_host *host = NULL;
+
+	if (ch >= CONFIG_SYS_SH_SDHI_NR_CHANNEL)
+		return -ENODEV;
+
+	host = malloc(sizeof(struct sh_sdhi_host));
+	if (!host)
+		return -ENOMEM;
+
+	mmc = mmc_create(&sh_sdhi_cfg, host);
+	if (!mmc) {
+		ret = -1;
+		goto error;
+	}
+
+	host->ch = ch;
+	host->addr = addr;
+	host->quirks = quirks;
+
+	if (host->quirks & SH_SDHI_QUIRK_16BIT_BUF)
+		host->bus_shift = 1;
+
+	return ret;
+error:
+	if (host)
+		free(host);
+	return ret;
+}