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authorMacpaul Lin <macpaul@andestech.com>2011-07-20 21:29:58 +0000
committerAndy Fleming <afleming@freescale.com>2011-09-04 18:03:02 -0500
commitf8ef0d4f4603dc0dbe10f7f4778b8066cea47b6f (patch)
tree605c5044e877c0fd20abbc1d4eae725b2bc9377b /drivers/mmc/ftsdc010_esdhc.c
parentaaf3d41aa0127df696947b8c1355d88f469a9a37 (diff)
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ftsdc010: add support of ftsdc010 mmc controller
Faraday FTSDC010 controller is a SD/MMC controller for SoC chip. Signed-off-by: Macpaul Lin <macpaul@andestech.com>
Diffstat (limited to 'drivers/mmc/ftsdc010_esdhc.c')
-rw-r--r--drivers/mmc/ftsdc010_esdhc.c667
1 files changed, 667 insertions, 0 deletions
diff --git a/drivers/mmc/ftsdc010_esdhc.c b/drivers/mmc/ftsdc010_esdhc.c
new file mode 100644
index 0000000..e38dd87
--- /dev/null
+++ b/drivers/mmc/ftsdc010_esdhc.c
@@ -0,0 +1,667 @@
+/*
+ * Copyright (C) 2011 Andes Technology Corporation
+ * Macpaul Lin, Andes Technology Corporation <macpaul@andestech.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <config.h>
+#include <common.h>
+#include <mmc.h>
+
+#include <asm/io.h>
+#include <faraday/ftsdc010.h>
+
+/*
+ * supported mmc hosts
+ * setting the number CONFIG_FTSDC010_NUMBER in your configuration file.
+ */
+static struct mmc ftsdc010_dev[CONFIG_FTSDC010_NUMBER];
+static struct mmc_host ftsdc010_host[CONFIG_FTSDC010_NUMBER];
+
+static struct ftsdc010_mmc *ftsdc010_get_base_mmc(int dev_index)
+{
+ return (struct ftsdc010_mmc *)CONFIG_FTSDC010_BASE + dev_index;
+}
+
+#ifdef DEBUG
+static void ftsdc010_dump_reg(struct mmc_host *host)
+{
+ debug("cmd: %08x\n", readl(&host->reg->cmd));
+ debug("argu: %08x\n", readl(&host->reg->argu));
+ debug("rsp0: %08x\n", readl(&host->reg->rsp0));
+ debug("rsp1: %08x\n", readl(&host->reg->rsp1));
+ debug("rsp2: %08x\n", readl(&host->reg->rsp2));
+ debug("rsp3: %08x\n", readl(&host->reg->rsp3));
+ debug("rsp_cmd: %08x\n", readl(&host->reg->rsp_cmd));
+ debug("dcr: %08x\n", readl(&host->reg->dcr));
+ debug("dtr: %08x\n", readl(&host->reg->dtr));
+ debug("dlr: %08x\n", readl(&host->reg->dlr));
+ debug("status: %08x\n", readl(&host->reg->status));
+ debug("clr: %08x\n", readl(&host->reg->clr));
+ debug("int_mask: %08x\n", readl(&host->reg->int_mask));
+ debug("pcr: %08x\n", readl(&host->reg->pcr));
+ debug("ccr: %08x\n", readl(&host->reg->ccr));
+ debug("bwr: %08x\n", readl(&host->reg->bwr));
+ debug("dwr: %08x\n", readl(&host->reg->dwr));
+ debug("feature: %08x\n", readl(&host->reg->feature));
+ debug("rev: %08x\n", readl(&host->reg->rev));
+}
+#endif
+
+static unsigned int enable_imask(struct ftsdc010_mmc *reg, unsigned int imask)
+{
+ unsigned int newmask;
+
+ newmask = readl(&reg->int_mask);
+ newmask |= imask;
+
+ writel(newmask, &reg->int_mask);
+
+ return newmask;
+}
+
+static void ftsdc010_pio_read(struct mmc_host *host, char *buf, unsigned int size)
+{
+ unsigned int fifo;
+ unsigned int fifo_words;
+ unsigned int *ptr;
+ unsigned int status;
+ unsigned int retry = 0;
+
+ /* get_data_buffer */
+ ptr = (unsigned int *)buf;
+
+ while (size) {
+ status = readl(&host->reg->status);
+
+ if (status & FTSDC010_STATUS_FIFO_ORUN) {
+ fifo = host->fifo_len > size ?
+ size : host->fifo_len;
+
+ size -= fifo;
+
+ fifo_words = fifo >> 2;
+
+ while (fifo_words--)
+ *ptr++ = readl(&host->reg->dwr);
+
+ /*
+ * for adding some delays for SD card to put
+ * data into FIFO again
+ */
+ udelay(4*FTSDC010_DELAY_UNIT);
+
+#ifdef CONFIG_FTSDC010_SDIO
+ /* sdio allow non-power-of-2 blksz */
+ if (fifo & 3) {
+ unsigned int n = fifo & 3;
+ unsigned int data = readl(&host->reg->dwr);
+
+ unsigned char *p = (unsigned char *)ptr;
+
+ while (n--) {
+ *p++ = data;
+ data >>= 8;
+ }
+ }
+#endif
+ } else {
+ udelay(1);
+ if (++retry >= FTSDC010_PIO_RETRY) {
+ debug("%s: PIO_RETRY timeout\n", __func__);
+ return;
+ }
+ }
+ }
+}
+
+static void ftsdc010_pio_write(struct mmc_host *host, const char *buf,
+ unsigned int size)
+{
+ unsigned int fifo;
+ unsigned int *ptr;
+ unsigned int status;
+ unsigned int retry = 0;
+
+ /* get data buffer */
+ ptr = (unsigned int *)buf;
+
+ while (size) {
+ status = readl(&host->reg->status);
+
+ if (status & FTSDC010_STATUS_FIFO_ORUN) {
+ fifo = host->fifo_len > size ?
+ size : host->fifo_len;
+
+ size -= fifo;
+
+ fifo = (fifo + 3) >> 2;
+
+ while (fifo--) {
+ writel(*ptr, &host->reg->dwr);
+ ptr++;
+ }
+
+ } else {
+ udelay(1);
+ if (++retry >= FTSDC010_PIO_RETRY) {
+ debug("%s: PIO_RETRY timeout\n", __func__);
+ return;
+ }
+ }
+ }
+}
+
+static int ftsdc010_pio_check_status(struct mmc *mmc, struct mmc_cmd *cmd,
+ struct mmc_data *data)
+{
+ struct mmc_host *host = mmc->priv;
+
+ unsigned int sta, clear;
+ unsigned int i;
+
+ /* check response and hardware status */
+ clear = 0;
+
+ /* chech CMD_SEND */
+ for (i = 0; i < FTSDC010_CMD_RETRY; i++) {
+ sta = readl(&host->reg->status);
+ /* Command Complete */
+ if (sta & FTSDC010_STATUS_CMD_SEND) {
+ if (!data)
+ clear |= FTSDC010_CLR_CMD_SEND;
+ break;
+ }
+ }
+
+ if (i > FTSDC010_CMD_RETRY) {
+ printf("%s: send command timeout\n", __func__);
+ return TIMEOUT;
+ }
+
+ /* debug: print status register and command index*/
+ debug("sta: %08x cmd %d\n", sta, cmd->cmdidx);
+
+ /* handle data FIFO */
+ if ((sta & FTSDC010_STATUS_FIFO_ORUN) ||
+ (sta & FTSDC010_STATUS_FIFO_URUN)) {
+
+ /* Wrong DATA FIFO Flag */
+ if (data == NULL)
+ printf("%s, data fifo wrong: sta: %08x cmd %d\n",
+ __func__, sta, cmd->cmdidx);
+
+ if (sta & FTSDC010_STATUS_FIFO_ORUN)
+ clear |= FTSDC010_STATUS_FIFO_ORUN;
+ if (sta & FTSDC010_STATUS_FIFO_URUN)
+ clear |= FTSDC010_STATUS_FIFO_URUN;
+ }
+
+ /* check RSP TIMEOUT or FAIL */
+ if (sta & FTSDC010_STATUS_RSP_TIMEOUT) {
+ /* RSP TIMEOUT */
+ debug("%s: RSP timeout: sta: %08x cmd %d\n",
+ __func__, sta, cmd->cmdidx);
+
+ clear |= FTSDC010_CLR_RSP_TIMEOUT;
+ writel(clear, &host->reg->clr);
+
+ return TIMEOUT;
+ } else if (sta & FTSDC010_STATUS_RSP_CRC_FAIL) {
+ /* clear response fail bit */
+ debug("%s: RSP CRC FAIL: sta: %08x cmd %d\n",
+ __func__, sta, cmd->cmdidx);
+
+ clear |= FTSDC010_CLR_RSP_CRC_FAIL;
+ writel(clear, &host->reg->clr);
+
+ return 0;
+ } else if (sta & FTSDC010_STATUS_RSP_CRC_OK) {
+
+ /* clear response CRC OK bit */
+ clear |= FTSDC010_CLR_RSP_CRC_OK;
+ }
+
+ /* check DATA TIMEOUT or FAIL */
+ if (data) {
+ if (sta & FTSDC010_STATUS_DATA_TIMEOUT) {
+ /* DATA TIMEOUT */
+ debug("%s: DATA TIMEOUT: sta: %08x\n",
+ __func__, sta);
+
+ clear |= FTSDC010_STATUS_DATA_TIMEOUT;
+ writel(sta, &host->reg->clr);
+ return TIMEOUT;
+ } else if (sta & FTSDC010_STATUS_DATA_CRC_FAIL) {
+ /* Error Interrupt */
+ debug("%s: DATA CRC FAIL: sta: %08x\n",
+ __func__, sta);
+
+ clear |= FTSDC010_STATUS_DATA_CRC_FAIL;
+ writel(clear, &host->reg->clr);
+
+ return 0;
+ } else if (sta & FTSDC010_STATUS_DATA_END) {
+ /* Transfer Complete */
+ clear |= FTSDC010_STATUS_DATA_END;
+ }
+ }
+
+ /* transaction is success and clear status register */
+ writel(clear, &host->reg->clr);
+
+ return 0;
+}
+
+static int ftsdc010_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd,
+ struct mmc_data *data)
+{
+ struct mmc_host *host = mmc->priv;
+
+#ifdef CONFIG_FTSDC010_SDIO
+ unsigned int scon;
+#endif
+ unsigned int ccon;
+ unsigned int mask, tmpmask;
+ unsigned int ret;
+
+ if (data)
+ mask = FTSDC010_INT_MASK_RSP_TIMEOUT;
+ else if (cmd->resp_type & MMC_RSP_PRESENT)
+ mask = FTSDC010_INT_MASK_RSP_TIMEOUT;
+ else
+ mask = FTSDC010_INT_MASK_CMD_SEND;
+
+ /* write argu reg */
+ debug("%s: cmd->arg: %08x\n", __func__, cmd->cmdarg);
+ writel(cmd->cmdarg, &host->reg->argu);
+
+ /* setup cmd reg */
+ debug("cmd: %d\n", cmd->cmdidx);
+ debug("resp: %08x\n", cmd->resp_type);
+
+ /* setup commnad */
+ ccon = FTSDC010_CMD_IDX(cmd->cmdidx);
+
+ /* setup command flags */
+ ccon |= FTSDC010_CMD_CMD_EN;
+
+ /*
+ * This hardware didn't support specific commands for mapping
+ * MMC_RSP_BUSY and MMC_RSP_OPCODE. Hence we don't deal with it.
+ */
+ if (cmd->resp_type & MMC_RSP_PRESENT) {
+ ccon |= FTSDC010_CMD_NEED_RSP;
+ mask |= FTSDC010_INT_MASK_RSP_CRC_OK |
+ FTSDC010_INT_MASK_RSP_CRC_FAIL;
+ }
+
+ if (cmd->resp_type & MMC_RSP_136)
+ ccon |= FTSDC010_CMD_LONG_RSP;
+
+ /* In Linux driver, MMC_CMD_APP_CMD is checked in last_opcode */
+ if (host->last_opcode == MMC_CMD_APP_CMD)
+ ccon |= FTSDC010_CMD_APP_CMD;
+
+#ifdef CONFIG_FTSDC010_SDIO
+ scon = readl(&host->reg->sdio_ctrl1);
+ if (host->card_type == MMC_TYPE_SDIO)
+ scon |= FTSDC010_SDIO_CTRL1_SDIO_ENABLE;
+ else
+ scon &= ~FTSDC010_SDIO_CTRL1_SDIO_ENABLE;
+ writel(scon, &host->reg->sdio_ctrl1);
+#endif
+
+ /* record last opcode for specifing the command type to hardware */
+ host->last_opcode = cmd->cmdidx;
+
+ /* write int_mask reg */
+ tmpmask = readl(&host->reg->int_mask);
+ tmpmask |= mask;
+ writel(tmpmask, &host->reg->int_mask);
+
+ /* write cmd reg */
+ debug("%s: ccon: %08x\n", __func__, ccon);
+ writel(ccon, &host->reg->cmd);
+ udelay(4*FTSDC010_DELAY_UNIT);
+
+ /* read/write data */
+ if (data && (data->flags & MMC_DATA_READ)) {
+ ftsdc010_pio_read(host, data->dest,
+ data->blocksize * data->blocks);
+ } else if (data && (data->flags & MMC_DATA_WRITE)) {
+ ftsdc010_pio_write(host, data->src,
+ data->blocksize * data->blocks);
+ }
+
+ /* pio check response status */
+ ret = ftsdc010_pio_check_status(mmc, cmd, data);
+ if (!ret) {
+ /* if it is long response */
+ if (ccon & FTSDC010_CMD_LONG_RSP) {
+ cmd->response[0] = readl(&host->reg->rsp3);
+ cmd->response[1] = readl(&host->reg->rsp2);
+ cmd->response[2] = readl(&host->reg->rsp1);
+ cmd->response[3] = readl(&host->reg->rsp0);
+
+ } else {
+ cmd->response[0] = readl(&host->reg->rsp0);
+ }
+ }
+
+ udelay(FTSDC010_DELAY_UNIT);
+ return ret;
+}
+
+static unsigned int cal_blksz(unsigned int blksz)
+{
+ unsigned int blksztwo = 0;
+
+ while (blksz >>= 1)
+ blksztwo++;
+
+ return blksztwo;
+}
+
+static int ftsdc010_setup_data(struct mmc *mmc, struct mmc_data *data)
+{
+ struct mmc_host *host = mmc->priv;
+ unsigned int dcon, newmask;
+
+ /* configure data transfer paramter */
+ if (!data)
+ return 0;
+
+ if (((data->blocksize - 1) & data->blocksize) != 0) {
+ printf("%s: can't do non-power-of 2 sized block transfers"
+ " (blksz %d)\n", __func__, data->blocksize);
+ return -1;
+ }
+
+ /*
+ * We cannot deal with unaligned blocks with more than
+ * one block being transfered.
+ */
+ if ((data->blocksize <= 2) && (data->blocks > 1)) {
+ printf("%s: can't do non-word sized block transfers"
+ " (blksz %d)\n", __func__, data->blocksize);
+ return -1;
+ }
+
+ /* data length */
+ dcon = data->blocksize * data->blocks;
+ writel(dcon, &host->reg->dlr);
+
+ /* write data control */
+ dcon = cal_blksz(data->blocksize);
+
+ /* add to IMASK register */
+ newmask = (FTSDC010_STATUS_RSP_CRC_FAIL | FTSDC010_STATUS_DATA_TIMEOUT);
+
+ /*
+ * enable UNDERRUN will trigger interrupt immediatedly
+ * So setup it when rsp is received successfully
+ */
+ if (data->flags & MMC_DATA_WRITE) {
+ dcon |= FTSDC010_DCR_DATA_WRITE;
+ } else {
+ dcon &= ~FTSDC010_DCR_DATA_WRITE;
+ newmask |= FTSDC010_STATUS_FIFO_ORUN;
+ }
+ enable_imask(host->reg, newmask);
+
+#ifdef CONFIG_FTSDC010_SDIO
+ /* always reset fifo since last transfer may fail */
+ dcon |= FTSDC010_DCR_FIFO_RST;
+
+ /* handle sdio */
+ dcon = data->blocksize | data->blocks << 15;
+ if (data->blocks > 1)
+ dcon |= FTSDC010_SDIO_CTRL1_SDIO_BLK_MODE;
+#endif
+
+ /* enable data transfer which will be pended until cmd is send */
+ dcon |= FTSDC010_DCR_DATA_EN;
+ writel(dcon, &host->reg->dcr);
+
+ return 0;
+}
+
+static int ftsdc010_send_request(struct mmc *mmc, struct mmc_cmd *cmd,
+ struct mmc_data *data)
+{
+ int ret;
+
+ if (data) {
+ ret = ftsdc010_setup_data(mmc, data);
+
+ if (ret) {
+ printf("%s: setup data error\n", __func__);
+ return -1;
+ }
+
+ if ((data->flags & MMC_DATA_BOTH_DIR) == MMC_DATA_BOTH_DIR) {
+ printf("%s: data is both direction\n", __func__);
+ return -1;
+ }
+ }
+
+ /* Send command */
+ ret = ftsdc010_send_cmd(mmc, cmd, data);
+ return ret;
+}
+
+static int ftsdc010_card_detect(struct mmc *mmc)
+{
+ struct mmc_host *host = mmc->priv;
+ unsigned int sta;
+
+ sta = readl(&host->reg->status);
+ debug("%s: card status: %08x\n", __func__, sta);
+
+ return (sta & FTSDC010_STATUS_CARD_DETECT) ? 0 : 1;
+}
+
+static int ftsdc010_request(struct mmc *mmc, struct mmc_cmd *cmd,
+ struct mmc_data *data)
+{
+ int ret;
+
+ if (ftsdc010_card_detect(mmc) == 0) {
+ printf("%s: no medium present\n", __func__);
+ return -1;
+ } else {
+ ret = ftsdc010_send_request(mmc, cmd, data);
+ return ret;
+ }
+}
+
+static void ftsdc010_set_clk(struct mmc *mmc)
+{
+ struct mmc_host *host = mmc->priv;
+ unsigned char clk_div;
+ unsigned char real_rate;
+ unsigned int clock;
+
+ debug("%s: mmc_set_clock: %x\n", __func__, mmc->clock);
+ clock = readl(&host->reg->ccr);
+
+ if (mmc->clock == 0) {
+ real_rate = 0;
+ clock |= FTSDC010_CCR_CLK_DIS;
+ } else {
+ debug("%s, mmc->clock: %08x, origin clock: %08x\n",
+ __func__, mmc->clock, clock);
+
+ for (clk_div = 0; clk_div <= 127; clk_div++) {
+ real_rate = (CONFIG_SYS_CLK_FREQ / 2) /
+ (2 * (clk_div + 1));
+
+ if (real_rate <= mmc->clock)
+ break;
+ }
+
+ debug("%s: computed real_rete: %x, clk_div: %x\n",
+ __func__, real_rate, clk_div);
+
+ if (clk_div > 127)
+ debug("%s: no match clock rate, %x\n",
+ __func__, mmc->clock);
+
+ clock = (clock & ~FTSDC010_CCR_CLK_DIV(0x7f)) |
+ FTSDC010_CCR_CLK_DIV(clk_div);
+
+ clock &= ~FTSDC010_CCR_CLK_DIS;
+ }
+
+ debug("%s, set clock: %08x\n", __func__, clock);
+ writel(clock, &host->reg->ccr);
+}
+
+static void ftsdc010_set_ios(struct mmc *mmc)
+{
+ struct mmc_host *host = mmc->priv;
+ unsigned int power;
+ unsigned long val;
+ unsigned int bus_width;
+
+ debug("%s: bus_width: %x, clock: %d\n",
+ __func__, mmc->bus_width, mmc->clock);
+
+ /* set pcr: power on */
+ power = readl(&host->reg->pcr);
+ power |= FTSDC010_PCR_POWER_ON;
+ writel(power, &host->reg->pcr);
+
+ if (mmc->clock)
+ ftsdc010_set_clk(mmc);
+
+ /* set bwr: bus width reg */
+ bus_width = readl(&host->reg->bwr);
+ bus_width &= ~(FTSDC010_BWR_WIDE_8_BUS | FTSDC010_BWR_WIDE_4_BUS |
+ FTSDC010_BWR_SINGLE_BUS);
+
+ if (mmc->bus_width == 8)
+ bus_width |= FTSDC010_BWR_WIDE_8_BUS;
+ else if (mmc->bus_width == 4)
+ bus_width |= FTSDC010_BWR_WIDE_4_BUS;
+ else
+ bus_width |= FTSDC010_BWR_SINGLE_BUS;
+
+ writel(bus_width, &host->reg->bwr);
+
+ /* set fifo depth */
+ val = readl(&host->reg->feature);
+ host->fifo_len = FTSDC010_FEATURE_FIFO_DEPTH(val) * 4; /* 4 bytes */
+
+ /* set data timeout register */
+ val = -1;
+ writel(val, &host->reg->dtr);
+}
+
+static void ftsdc010_reset(struct mmc_host *host)
+{
+ unsigned int timeout;
+
+ /* Do SDC_RST: Software reset for all register */
+ writel(FTSDC010_CMD_SDC_RST, &host->reg->cmd);
+
+ host->clock = 0;
+
+ /* this hardware has no reset finish flag to read */
+ /* wait 100ms maximum */
+ timeout = 100;
+
+ /* hw clears the bit when it's done */
+ while (readl(&host->reg->dtr) != 0) {
+ if (timeout == 0) {
+ printf("%s: reset timeout error\n", __func__);
+ return;
+ }
+ timeout--;
+ udelay(10*FTSDC010_DELAY_UNIT);
+ }
+}
+
+static int ftsdc010_core_init(struct mmc *mmc)
+{
+ struct mmc_host *host = mmc->priv;
+ unsigned int mask;
+ unsigned int major, minor, revision;
+
+ /* get hardware version */
+ host->version = readl(&host->reg->rev);
+
+ major = FTSDC010_REV_MAJOR(host->version);
+ minor = FTSDC010_REV_MINOR(host->version);
+ revision = FTSDC010_REV_REVISION(host->version);
+
+ printf("ftsdc010 hardware ver: %d_%d_r%d\n", major, minor, revision);
+
+ /* Interrupt MASK register init - mask all */
+ writel(0x0, &host->reg->int_mask);
+
+ mask = FTSDC010_INT_MASK_CMD_SEND |
+ FTSDC010_INT_MASK_DATA_END |
+ FTSDC010_INT_MASK_CARD_CHANGE;
+#ifdef CONFIG_FTSDC010_SDIO
+ mask |= FTSDC010_INT_MASK_CP_READY |
+ FTSDC010_INT_MASK_CP_BUF_READY |
+ FTSDC010_INT_MASK_PLAIN_TEXT_READY |
+ FTSDC010_INT_MASK_SDIO_IRPT;
+#endif
+
+ writel(mask, &host->reg->int_mask);
+
+ return 0;
+}
+
+int ftsdc010_mmc_init(int dev_index)
+{
+ struct mmc *mmc;
+ struct mmc_host *host;
+
+ mmc = &ftsdc010_dev[dev_index];
+
+ sprintf(mmc->name, "FTSDC010 SD/MMC");
+ mmc->priv = &ftsdc010_host[dev_index];
+ mmc->send_cmd = ftsdc010_request;
+ mmc->set_ios = ftsdc010_set_ios;
+ mmc->init = ftsdc010_core_init;
+
+ mmc->voltages = MMC_VDD_32_33 | MMC_VDD_33_34;
+
+ mmc->host_caps = MMC_MODE_4BIT | MMC_MODE_8BIT;
+
+ mmc->host_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS;
+
+ mmc->f_min = CONFIG_SYS_CLK_FREQ / 2 / (2*128);
+ mmc->f_max = CONFIG_SYS_CLK_FREQ / 2 / 2;
+
+ ftsdc010_host[dev_index].clock = 0;
+ ftsdc010_host[dev_index].reg = ftsdc010_get_base_mmc(dev_index);
+ mmc_register(mmc);
+
+ /* reset mmc */
+ host = (struct mmc_host *)mmc->priv;
+ ftsdc010_reset(host);
+
+ return 0;
+}