[U-Boot] [PATCH v2 16/18] mmc: mtk-sd: add SD/MMC host controller driver for MT7623 SoC

[Ryder Lee <ryder.lee@mediatek.com>]

From: Weijie Gao <weijie.gao@mediatek.com>

This patch adds MT7623 host controller driver for accessing SD/MMC.

Cc: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Weijie Gao <weijie.gao@mediatek.com>
Signed-off-by: Ryder Lee <ryder.lee@mediatek.com>
Tested-by: Matthias Brugger <matthias.bgg@gmail.com>
---
 drivers/mmc/Kconfig  |    9 +
 drivers/mmc/Makefile |    1 +
 drivers/mmc/mtk-sd.c | 1331 ++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 1341 insertions(+)
 create mode 100644 drivers/mmc/mtk-sd.c

diff --git a/drivers/mmc/Kconfig b/drivers/mmc/Kconfig
index 0a0d4aa..ca13341 100644
--- a/drivers/mmc/Kconfig
+++ b/drivers/mmc/Kconfig
@@ -598,6 +598,15 @@ config FTSDC010_SDIO
 	help
 		This can enable ftsdc010 sdio function.
 
+config MMC_MTK
+	bool "MediaTek SD/MMC Card Interface support"
+	default n
+	help
+	  This selects the MediaTek(R) Secure digital and Multimedia card Interface.
+	  If you have a machine with a integrated SD/MMC card reader, say Y or M here.
+	  This is needed if support for any SD/SDIO/MMC devices is required.
+	  If unsure, say N.
+
 endif
 
 config TEGRA124_MMC_DISABLE_EXT_LOOPBACK
diff --git a/drivers/mmc/Makefile b/drivers/mmc/Makefile
index 23c5b0d..801a26d 100644
--- a/drivers/mmc/Makefile
+++ b/drivers/mmc/Makefile
@@ -65,3 +65,4 @@ obj-$(CONFIG_MMC_SUNXI)			+= sunxi_mmc.o
 obj-$(CONFIG_MMC_UNIPHIER)		+= tmio-common.o uniphier-sd.o
 obj-$(CONFIG_RENESAS_SDHI)		+= tmio-common.o renesas-sdhi.o
 obj-$(CONFIG_MMC_BCM2835)		+= bcm2835_sdhost.o
+obj-$(CONFIG_MMC_MTK)			+= mtk-sd.o
diff --git a/drivers/mmc/mtk-sd.c b/drivers/mmc/mtk-sd.c
new file mode 100644
index 0000000..5027764
--- /dev/null
+++ b/drivers/mmc/mtk-sd.c
@@ -0,0 +1,1331 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * MediaTek SD/MMC Card Interface driver
+ *
+ * Copyright (C) 2018 MediaTek Inc.
+ * Author: Weijie Gao <weijie.gao@mediatek.com>
+ */
+
+#include <clk.h>
+#include <common.h>
+#include <dm.h>
+#include <dm/pinctrl.h>
+#include <errno.h>
+#include <stdbool.h>
+#include <malloc.h>
+#include <mmc.h>
+#include <asm/gpio.h>
+#include <linux/bitops.h>
+#include <linux/io.h>
+#include <linux/iopoll.h>
+
+#define MSDC_CFG			0x0
+#define   MSDC_CFG_HS400_CK_MODE_EXT	BIT(22)
+#define   MSDC_CFG_CKMOD_EXT_M		0x03
+#define   MSDC_CFG_CKMOD_EXT_S		20
+#define   MSDC_CFG_CKDIV_EXT_M		0xfff
+#define   MSDC_CFG_CKDIV_EXT_S		8
+#define   MSDC_CFG_HS400_CK_MODE	BIT(18)
+#define   MSDC_CFG_CKMOD_M		0x03
+#define   MSDC_CFG_CKMOD_S		16
+#define   MSDC_CFG_CKDIV_M		0xff
+#define   MSDC_CFG_CKDIV_S		8
+#define   MSDC_CFG_CKSTB		BIT(7)
+#define   MSDC_CFG_PIO			BIT(3)
+#define   MSDC_CFG_RST			BIT(2)
+#define   MSDC_CFG_CKPDN		BIT(1)
+#define   MSDC_CFG_MODE			BIT(0)
+
+#define MSDC_IOCON			0x04
+#define   MSDC_IOCON_W_DSPL		BIT(8)
+#define   MSDC_IOCON_DSPL		BIT(2)
+#define   MSDC_IOCON_RSPL		BIT(1)
+
+#define MSDC_PS				0x08
+#define   MSDC_PS_DAT0			BIT(16)
+#define   MSDC_PS_CDEN			BIT(0)
+
+#define MSDC_INT			0x0c
+#define MSDC_INTEN			0x10
+#define   MSDC_INT_ACMDRDY		BIT(3)
+#define   MSDC_INT_ACMDTMO		BIT(4)
+#define   MSDC_INT_ACMDCRCERR		BIT(5)
+#define   MSDC_INT_CMDRDY		BIT(8)
+#define   MSDC_INT_CMDTMO		BIT(9)
+#define   MSDC_INT_RSPCRCERR		BIT(10)
+#define   MSDC_INT_XFER_COMPL		BIT(12)
+#define   MSDC_INT_DATTMO		BIT(14)
+#define   MSDC_INT_DATCRCERR		BIT(15)
+
+#define MSDC_FIFOCS			0x14
+#define   MSDC_FIFOCS_CLR		BIT(31)
+#define   MSDC_FIFOCS_TXCNT_M		0xff
+#define   MSDC_FIFOCS_TXCNT_S		16
+#define   MSDC_FIFOCS_RXCNT_M		0xff
+#define   MSDC_FIFOCS_RXCNT_S		0
+
+#define MSDC_TXDATA			0x18
+#define MSDC_RXDATA			0x1c
+
+#define SDC_CFG				0x30
+#define   SDC_CFG_DTOC_M		0xff
+#define   SDC_CFG_DTOC_S		24
+#define   SDC_CFG_SDIOIDE		BIT(20)
+#define   SDC_CFG_SDIO			BIT(19)
+#define   SDC_CFG_BUSWIDTH_M		0x03
+#define   SDC_CFG_BUSWIDTH_S		16
+
+#define SDC_CMD				0x34
+#define   SDC_CMD_BLK_LEN_M		0xfff
+#define   SDC_CMD_BLK_LEN_S		16
+#define   SDC_CMD_STOP			BIT(14)
+#define   SDC_CMD_WR			BIT(13)
+#define   SDC_CMD_DTYPE_M		0x03
+#define   SDC_CMD_DTYPE_S		11
+#define   SDC_CMD_RSPTYP_M		0x07
+#define   SDC_CMD_RSPTYP_S		7
+#define   SDC_CMD_CMD_M			0x3f
+#define   SDC_CMD_CMD_S			0
+
+#define SDC_ARG				0x38
+
+#define SDC_STS				0x3c
+#define   SDC_STS_CMDBUSY		BIT(1)
+#define   SDC_STS_SDCBUSY		BIT(0)
+
+#define SDC_RESP0			0x40
+#define SDC_RESP1			0x44
+#define SDC_RESP2			0x48
+#define SDC_RESP3			0x4c
+
+#define SDC_BLK_NUM			0x50
+
+#define SDC_ADV_CFG0			0x64
+#define   SDC_RX_ENHANCE_EN		BIT(20)
+
+#define MSDC_PATCH_BIT			0xb0
+#define   MSDC_INT_DAT_LATCH_CK_SEL_M	0x07
+#define   MSDC_INT_DAT_LATCH_CK_SEL_S	7
+
+#define MSDC_PATCH_BIT1			0xb4
+#define   MSDC_PB1_STOP_DLY_M		0x0f
+#define   MSDC_PB1_STOP_DLY_S		8
+
+#define MSDC_PATCH_BIT2			0xb8
+#define   MSDC_PB2_CRCSTSENSEL_M	0x07
+#define   MSDC_PB2_CRCSTSENSEL_S	29
+#define   MSDC_PB2_CFGCRCSTS		BIT(28)
+#define   MSDC_PB2_RESPSTSENSEL_M	0x07
+#define   MSDC_PB2_RESPSTSENSEL_S	16
+#define   MSDC_PB2_CFGRESP		BIT(15)
+#define   MSDC_PB2_RESPWAIT_M		0x03
+#define   MSDC_PB2_RESPWAIT_S		2
+
+#define MSDC_PAD_TUNE			0xec
+#define   MSDC_PAD_TUNE_CMDRRDLY_M	0x1f
+#define   MSDC_PAD_TUNE_CMDRRDLY_S	22
+#define   MSDC_PAD_TUNE_CMD_SEL		BIT(21)
+#define   MSDC_PAD_TUNE_CMDRDLY_M	0x1f
+#define   MSDC_PAD_TUNE_CMDRDLY_S	16
+#define   MSDC_PAD_TUNE_RXDLYSEL	BIT(15)
+#define   MSDC_PAD_TUNE_RD_SEL		BIT(13)
+#define   MSDC_PAD_TUNE_DATRRDLY_M	0x1f
+#define   MSDC_PAD_TUNE_DATRRDLY_S	8
+#define   MSDC_PAD_TUNE_DATWRDLY_M	0x1f
+#define   MSDC_PAD_TUNE_DATWRDLY_S	0
+
+#define MSDC_PAD_TUNE0			0xf0
+
+#define PAD_DS_TUNE			0x188
+
+#define EMMC50_CFG0			0x208
+#define   EMMC50_CFG_CFCSTS_SEL		BIT(4)
+
+#define SDC_FIFO_CFG			0x228
+#define   SDC_FIFO_CFG_WRVALIDSEL	BIT(24)
+#define   SDC_FIFO_CFG_RDVALIDSEL	BIT(25)
+
+/* SDC_CFG_BUSWIDTH */
+#define MSDC_BUS_1BITS			0x0
+#define MSDC_BUS_4BITS			0x1
+#define MSDC_BUS_8BITS			0x2
+
+#define MSDC_FIFO_SIZE			128
+
+#define PAD_DELAY_MAX			32
+
+#define CMD_INTS_MASK	\
+	(MSDC_INT_CMDRDY | MSDC_INT_RSPCRCERR | MSDC_INT_CMDTMO)
+
+#define DATA_INTS_MASK	\
+	(MSDC_INT_XFER_COMPL | MSDC_INT_DATTMO | MSDC_INT_DATCRCERR)
+
+struct msdc_compatible {
+	u8 clk_div_bits;
+	bool pad_tune0;
+	bool async_fifo;
+	bool data_tune;
+	bool busy_check;
+	bool stop_clk_fix;
+	bool enhance_rx;
+};
+
+struct msdc_delay_phase {
+	u8 maxlen;
+	u8 start;
+	u8 final_phase;
+};
+
+struct msdc_plat {
+	struct mmc_config cfg;
+	struct mmc mmc;
+};
+
+struct msdc_tune_para {
+	u32 iocon;
+	u32 pad_tune;
+};
+
+struct msdc_host {
+	void __iomem *base;
+	struct mmc *mmc;
+
+	struct msdc_compatible *dev_comp;
+
+	struct clk src_clk;
+	struct clk h_clk;
+
+	u32 mclk;
+	u32 src_clk_freq;
+	u32 sclk;
+
+	u32 timeout_ns;
+	u32 timeout_clks;
+
+	u32 hs400_ds_delay;
+	u32 hs200_cmd_int_delay;
+	u32 hs200_write_int_delay;
+	u32 latch_ck;
+	u32 r_smpl;
+	bool hs400_mode;
+
+	struct gpio_desc gpio_wp;
+	struct gpio_desc gpio_cd;
+
+	uint last_resp_type;
+	uint last_data_write;
+
+	enum bus_mode timing;
+
+	struct msdc_tune_para def_tune_para;
+	struct msdc_tune_para saved_tune_para;
+};
+
+static void msdc_reset_hw(struct msdc_host *host)
+{
+	u32 reg;
+
+	setbits_le32(host->base + MSDC_CFG, MSDC_CFG_RST);
+
+	readl_poll_timeout(host->base + MSDC_CFG, reg,
+			   !(reg & MSDC_CFG_RST), 1000000);
+}
+
+static void msdc_fifo_clr(struct msdc_host *host)
+{
+	u32 reg;
+
+	setbits_le32(host->base + MSDC_FIFOCS, MSDC_FIFOCS_CLR);
+
+	readl_poll_timeout(host->base + MSDC_FIFOCS, reg,
+			   !(reg & MSDC_FIFOCS_CLR), 1000000);
+}
+
+static u32 msdc_fifo_rx_bytes(struct msdc_host *host)
+{
+	return (readl(host->base + MSDC_FIFOCS) >> MSDC_FIFOCS_RXCNT_S) &
+		MSDC_FIFOCS_RXCNT_M;
+}
+
+static u32 msdc_fifo_tx_bytes(struct msdc_host *host)
+{
+	return (readl(host->base + MSDC_FIFOCS) >> MSDC_FIFOCS_TXCNT_S) &
+		MSDC_FIFOCS_TXCNT_M;
+}
+
+static u32 msdc_cmd_find_resp(struct msdc_host *host, struct mmc_cmd *cmd)
+{
+	u32 resp;
+
+	switch (cmd->resp_type) {
+		/* Actually, R1, R5, R6, R7 are the same */
+	case MMC_RSP_R1:
+		resp = 0x1;
+		break;
+	case MMC_RSP_R1b:
+		resp = 0x7;
+		break;
+	case MMC_RSP_R2:
+		resp = 0x2;
+		break;
+	case MMC_RSP_R3:
+		resp = 0x3;
+		break;
+	case MMC_RSP_NONE:
+	default:
+		resp = 0x0;
+		break;
+	}
+
+	return resp;
+}
+
+static u32 msdc_cmd_prepare_raw_cmd(struct msdc_host *host,
+				    struct mmc_cmd *cmd,
+				    struct mmc_data *data)
+{
+	u32 opcode = cmd->cmdidx;
+	u32 resp_type = msdc_cmd_find_resp(host, cmd);
+	uint blocksize = 0;
+	u32 dtype = 0;
+	u32 rawcmd = 0;
+
+	switch (opcode) {
+	case MMC_CMD_WRITE_MULTIPLE_BLOCK:
+	case MMC_CMD_READ_MULTIPLE_BLOCK:
+		dtype = 2;
+		break;
+	case MMC_CMD_WRITE_SINGLE_BLOCK:
+	case MMC_CMD_READ_SINGLE_BLOCK:
+	case SD_CMD_APP_SEND_SCR:
+		dtype = 1;
+		break;
+	case SD_CMD_SWITCH_FUNC: /* same as MMC_CMD_SWITCH */
+	case SD_CMD_SEND_IF_COND: /* same as MMC_CMD_SEND_EXT_CSD */
+	case SD_CMD_APP_SD_STATUS: /* same as MMC_CMD_SEND_STATUS */
+		if (data)
+			dtype = 1;
+	}
+
+	if (data) {
+		if (data->flags == MMC_DATA_WRITE)
+			rawcmd |= SDC_CMD_WR;
+
+		if (data->blocks > 1)
+			dtype = 2;
+
+		blocksize = data->blocksize;
+	}
+
+	rawcmd |= ((opcode & SDC_CMD_CMD_M) << SDC_CMD_CMD_S) |
+		((resp_type & SDC_CMD_RSPTYP_M) << SDC_CMD_RSPTYP_S) |
+		((blocksize & SDC_CMD_BLK_LEN_M) << SDC_CMD_BLK_LEN_S) |
+		((dtype & SDC_CMD_DTYPE_M) << SDC_CMD_DTYPE_S);
+
+	if (opcode == MMC_CMD_STOP_TRANSMISSION)
+		rawcmd |= SDC_CMD_STOP;
+
+	return rawcmd;
+}
+
+static int msdc_cmd_done(struct msdc_host *host, int events,
+			 struct mmc_cmd *cmd)
+{
+	u32 *rsp = cmd->response;
+	int ret = 0;
+
+	if (cmd->resp_type & MMC_RSP_PRESENT) {
+		if (cmd->resp_type & MMC_RSP_136) {
+			rsp[0] = readl(host->base + SDC_RESP3);
+			rsp[1] = readl(host->base + SDC_RESP2);
+			rsp[2] = readl(host->base + SDC_RESP1);
+			rsp[3] = readl(host->base + SDC_RESP0);
+		} else {
+			rsp[0] = readl(host->base + SDC_RESP0);
+		}
+	}
+
+	if (!(events & MSDC_INT_CMDRDY)) {
+		if (cmd->cmdidx != MMC_CMD_SEND_TUNING_BLOCK &&
+		    cmd->cmdidx != MMC_CMD_SEND_TUNING_BLOCK_HS200)
+			/*
+			 * should not clear fifo/interrupt as the tune data
+			 * may have alreay come.
+			 */
+			msdc_reset_hw(host);
+
+		if (events & MSDC_INT_CMDTMO)
+			ret = -ETIMEDOUT;
+		else
+			ret = -EIO;
+	}
+
+	return ret;
+}
+
+static bool msdc_cmd_is_ready(struct msdc_host *host)
+{
+	int ret;
+	u32 reg;
+
+	/* The max busy time we can endure is 20ms */
+	ret = readl_poll_timeout(host->base + SDC_STS, reg,
+				 !(reg & SDC_STS_CMDBUSY), 20000);
+
+	if (ret) {
+		pr_err("CMD bus busy detected\n");
+		msdc_reset_hw(host);
+		return false;
+	}
+
+	if (host->last_resp_type == MMC_RSP_R1b && host->last_data_write) {
+		ret = readl_poll_timeout(host->base + MSDC_PS, reg,
+					 reg & MSDC_PS_DAT0, 1000000);
+
+		if (ret) {
+			pr_err("Card stuck in programming state!\n");
+			msdc_reset_hw(host);
+			return false;
+		}
+	}
+
+	return true;
+}
+
+static int msdc_start_command(struct msdc_host *host, struct mmc_cmd *cmd,
+			      struct mmc_data *data)
+{
+	u32 rawcmd;
+	u32 status;
+	u32 blocks = 0;
+	int ret;
+
+	if (!msdc_cmd_is_ready(host))
+		return -EIO;
+
+	msdc_fifo_clr(host);
+
+	host->last_resp_type = cmd->resp_type;
+	host->last_data_write = 0;
+
+	rawcmd = msdc_cmd_prepare_raw_cmd(host, cmd, data);
+
+	if (data)
+		blocks = data->blocks;
+
+	writel(CMD_INTS_MASK, host->base + MSDC_INT);
+	writel(blocks, host->base + SDC_BLK_NUM);
+	writel(cmd->cmdarg, host->base + SDC_ARG);
+	writel(rawcmd, host->base + SDC_CMD);
+
+	ret = readl_poll_timeout(host->base + MSDC_INT, status,
+				 status & CMD_INTS_MASK, 1000000);
+
+	if (ret)
+		status = MSDC_INT_CMDTMO;
+
+	return msdc_cmd_done(host, status, cmd);
+}
+
+static void msdc_fifo_read(struct msdc_host *host, u8 *buf, u32 size)
+{
+	u32 *wbuf;
+
+	while ((size_t)buf % 4) {
+		*buf++ = readb(host->base + MSDC_RXDATA);
+		size--;
+	}
+
+	wbuf = (u32 *)buf;
+	while (size >= 4) {
+		*wbuf++ = readl(host->base + MSDC_RXDATA);
+		size -= 4;
+	}
+
+	buf = (u8 *)wbuf;
+	while (size) {
+		*buf++ = readb(host->base + MSDC_RXDATA);
+		size--;
+	}
+}
+
+static void msdc_fifo_write(struct msdc_host *host, const u8 *buf, u32 size)
+{
+	const u32 *wbuf;
+
+	while ((size_t)buf % 4) {
+		writeb(*buf++, host->base + MSDC_TXDATA);
+		size--;
+	}
+
+	wbuf = (const u32 *)buf;
+	while (size >= 4) {
+		writel(*wbuf++, host->base + MSDC_TXDATA);
+		size -= 4;
+	}
+
+	buf = (const u8 *)wbuf;
+	while (size) {
+		writeb(*buf++, host->base + MSDC_TXDATA);
+		size--;
+	}
+}
+
+static int msdc_pio_read(struct msdc_host *host, u8 *ptr, u32 size)
+{
+	u32 status;
+	u32 chksz;
+	int ret = 0;
+
+	while (1) {
+		status = readl(host->base + MSDC_INT);
+		writel(status, host->base + MSDC_INT);
+		status &= DATA_INTS_MASK;
+
+		if (status & MSDC_INT_DATCRCERR) {
+			ret = -EIO;
+			break;
+		}
+
+		if (status & MSDC_INT_DATTMO) {
+			ret = -ETIMEDOUT;
+			break;
+		}
+
+		if (status & MSDC_INT_XFER_COMPL) {
+			if (size) {
+				pr_err("data not fully read\n");
+				ret = -EIO;
+			}
+
+			break;
+		}
+
+		chksz = min(size, (u32)MSDC_FIFO_SIZE);
+
+		if (msdc_fifo_rx_bytes(host) >= chksz) {
+			msdc_fifo_read(host, ptr, chksz);
+			ptr += chksz;
+			size -= chksz;
+		}
+	}
+
+	return ret;
+}
+
+static int msdc_pio_write(struct msdc_host *host, const u8 *ptr, u32 size)
+{
+	u32 status;
+	u32 chksz;
+	int ret = 0;
+
+	while (1) {
+		status = readl(host->base + MSDC_INT);
+		writel(status, host->base + MSDC_INT);
+		status &= DATA_INTS_MASK;
+
+		if (status & MSDC_INT_DATCRCERR) {
+			ret = -EIO;
+			break;
+		}
+
+		if (status & MSDC_INT_DATTMO) {
+			ret = -ETIMEDOUT;
+			break;
+		}
+
+		if (status & MSDC_INT_XFER_COMPL) {
+			if (size) {
+				pr_err("data not fully written\n");
+				ret = -EIO;
+			}
+
+			break;
+		}
+
+		chksz = min(size, (u32)MSDC_FIFO_SIZE);
+
+		if (MSDC_FIFO_SIZE - msdc_fifo_tx_bytes(host) >= chksz) {
+			msdc_fifo_write(host, ptr, chksz);
+			ptr += chksz;
+			size -= chksz;
+		}
+	}
+
+	return ret;
+}
+
+static int msdc_start_data(struct msdc_host *host, struct mmc_data *data)
+{
+	u32 size;
+	int ret;
+
+	if (data->flags == MMC_DATA_WRITE)
+		host->last_data_write = 1;
+
+	writel(DATA_INTS_MASK, host->base + MSDC_INT);
+
+	size = data->blocks * data->blocksize;
+
+	if (data->flags == MMC_DATA_WRITE)
+		ret = msdc_pio_write(host, (const u8 *)data->src, size);
+	else
+		ret = msdc_pio_read(host, (u8 *)data->dest, size);
+
+	if (ret) {
+		msdc_reset_hw(host);
+		msdc_fifo_clr(host);
+	}
+
+	return ret;
+}
+
+static int msdc_ops_send_cmd(struct udevice *dev, struct mmc_cmd *cmd,
+			     struct mmc_data *data)
+{
+	struct msdc_host *host = dev_get_priv(dev);
+	int ret;
+
+	ret = msdc_start_command(host, cmd, data);
+	if (ret)
+		return ret;
+
+	if (data)
+		return msdc_start_data(host, data);
+
+	return 0;
+}
+
+static void msdc_set_timeout(struct msdc_host *host, u32 ns, u32 clks)
+{
+	u32 timeout, clk_ns;
+	u32 mode = 0;
+
+	host->timeout_ns = ns;
+	host->timeout_clks = clks;
+
+	if (host->sclk == 0) {
+		timeout = 0;
+	} else {
+		clk_ns = 1000000000UL / host->sclk;
+		timeout = (ns + clk_ns - 1) / clk_ns + clks;
+		/* unit is 1048576 sclk cycles */
+		timeout = (timeout + (0x1 << 20) - 1) >> 20;
+		if (host->dev_comp->clk_div_bits == 8)
+			mode = (readl(host->base + MSDC_CFG) >>
+				MSDC_CFG_CKMOD_S) & MSDC_CFG_CKMOD_M;
+		else
+			mode = (readl(host->base + MSDC_CFG) >>
+				MSDC_CFG_CKMOD_EXT_S) & MSDC_CFG_CKMOD_EXT_M;
+		/* DDR mode will double the clk cycles for data timeout */
+		timeout = mode >= 2 ? timeout * 2 : timeout;
+		timeout = timeout > 1 ? timeout - 1 : 0;
+		timeout = timeout > 255 ? 255 : timeout;
+	}
+
+	clrsetbits_le32(host->base + SDC_CFG, SDC_CFG_DTOC_M << SDC_CFG_DTOC_S,
+			timeout << SDC_CFG_DTOC_S);
+}
+
+static void msdc_set_buswidth(struct msdc_host *host, u32 width)
+{
+	u32 val = readl(host->base + SDC_CFG);
+
+	val &= ~(SDC_CFG_BUSWIDTH_M << SDC_CFG_BUSWIDTH_S);
+
+	switch (width) {
+	default:
+	case 1:
+		val |= (MSDC_BUS_1BITS << SDC_CFG_BUSWIDTH_S);
+		break;
+	case 4:
+		val |= (MSDC_BUS_4BITS << SDC_CFG_BUSWIDTH_S);
+		break;
+	case 8:
+		val |= (MSDC_BUS_8BITS << SDC_CFG_BUSWIDTH_S);
+		break;
+	}
+
+	writel(val, host->base + SDC_CFG);
+}
+
+static void msdc_set_mclk(struct msdc_host *host, enum bus_mode timing, u32 hz)
+{
+	u32 mode;
+	u32 div;
+	u32 sclk;
+	u32 reg;
+
+	if (!hz) {
+		host->mclk = 0;
+		clrbits_le32(host->base + MSDC_CFG, MSDC_CFG_CKPDN);
+		return;
+	}
+
+	if (host->dev_comp->clk_div_bits == 8)
+		clrbits_le32(host->base + MSDC_CFG, MSDC_CFG_HS400_CK_MODE);
+	else
+		clrbits_le32(host->base + MSDC_CFG,
+			     MSDC_CFG_HS400_CK_MODE_EXT);
+
+	if (timing == UHS_DDR50 || timing == MMC_DDR_52 ||
+	    timing == MMC_HS_400) {
+		if (timing == MMC_HS_400)
+			mode = 0x3;
+		else
+			mode = 0x2; /* ddr mode and use divisor */
+
+		if (hz >= (host->src_clk_freq >> 2)) {
+			div = 0; /* mean div = 1/4 */
+			sclk = host->src_clk_freq >> 2; /* sclk = clk / 4 */
+		} else {
+			div = (host->src_clk_freq + ((hz << 2) - 1)) /
+			       (hz << 2);
+			sclk = (host->src_clk_freq >> 2) / div;
+			div = (div >> 1);
+		}
+
+		if (timing == MMC_HS_400 && hz >= (host->src_clk_freq >> 1)) {
+			if (host->dev_comp->clk_div_bits == 8)
+				setbits_le32(host->base + MSDC_CFG,
+					     MSDC_CFG_HS400_CK_MODE);
+			else
+				setbits_le32(host->base + MSDC_CFG,
+					     MSDC_CFG_HS400_CK_MODE_EXT);
+
+			sclk = host->src_clk_freq >> 1;
+			div = 0; /* div is ignore when bit18 is set */
+		}
+	} else if (hz >= host->src_clk_freq) {
+		mode = 0x1; /* no divisor */
+		div = 0;
+		sclk = host->src_clk_freq;
+	} else {
+		mode = 0x0; /* use divisor */
+		if (hz >= (host->src_clk_freq >> 1)) {
+			div = 0; /* mean div = 1/2 */
+			sclk = host->src_clk_freq >> 1; /* sclk = clk / 2 */
+		} else {
+			div = (host->src_clk_freq + ((hz << 2) - 1)) /
+			       (hz << 2);
+			sclk = (host->src_clk_freq >> 2) / div;
+		}
+	}
+
+	clrbits_le32(host->base + MSDC_CFG, MSDC_CFG_CKPDN);
+
+	if (host->dev_comp->clk_div_bits == 8) {
+		div = min(div, (u32)MSDC_CFG_CKDIV_M);
+		clrsetbits_le32(host->base + MSDC_CFG,
+				(MSDC_CFG_CKMOD_M << MSDC_CFG_CKMOD_S) |
+				(MSDC_CFG_CKDIV_M << MSDC_CFG_CKDIV_S),
+				(mode << MSDC_CFG_CKMOD_S) |
+				(div << MSDC_CFG_CKDIV_S));
+	} else {
+		div = min(div, (u32)MSDC_CFG_CKDIV_EXT_M);
+		clrsetbits_le32(host->base + MSDC_CFG,
+				(MSDC_CFG_CKMOD_EXT_M << MSDC_CFG_CKMOD_EXT_S) |
+				(MSDC_CFG_CKDIV_EXT_M << MSDC_CFG_CKDIV_EXT_S),
+				(mode << MSDC_CFG_CKMOD_S) |
+				(div << MSDC_CFG_CKDIV_EXT_S));
+	}
+
+	readl_poll_timeout(host->base + MSDC_CFG, reg,
+			   reg & MSDC_CFG_CKSTB, 1000000);
+
+	setbits_le32(host->base + MSDC_CFG, MSDC_CFG_CKPDN);
+	host->sclk = sclk;
+	host->mclk = hz;
+	host->timing = timing;
+
+	/* needed because clk changed. */
+	msdc_set_timeout(host, host->timeout_ns, host->timeout_clks);
+
+	/*
+	 * mmc_select_hs400() will drop to 50Mhz and High speed mode,
+	 * tune result of hs200/200Mhz is not suitable for 50Mhz
+	 */
+	if (host->sclk <= 52000000) {
+		writel(host->def_tune_para.iocon, host->base + MSDC_IOCON);
+		writel(host->def_tune_para.pad_tune,
+		       host->base + MSDC_PAD_TUNE);
+	} else {
+		writel(host->saved_tune_para.iocon, host->base + MSDC_IOCON);
+		writel(host->saved_tune_para.pad_tune,
+		       host->base + MSDC_PAD_TUNE);
+	}
+
+	dev_dbg(dev, "sclk: %d, timing: %d\n", host->sclk, timing);
+}
+
+static int msdc_ops_set_ios(struct udevice *dev)
+{
+	struct msdc_plat *plat = dev_get_platdata(dev);
+	struct msdc_host *host = dev_get_priv(dev);
+	struct mmc *mmc = &plat->mmc;
+	uint clock = mmc->clock;
+
+	msdc_set_buswidth(host, mmc->bus_width);
+
+	if (mmc->clk_disable)
+		clock = 0;
+	else if (clock < mmc->cfg->f_min)
+		clock = mmc->cfg->f_min;
+
+	if (host->mclk != clock || host->timing != mmc->selected_mode)
+		msdc_set_mclk(host, mmc->selected_mode, clock);
+
+	return 0;
+}
+
+#ifdef CONFIG_DM_GPIO
+static int msdc_ops_get_cd(struct udevice *dev)
+{
+	struct msdc_host *host = dev_get_priv(dev);
+
+	if (!host->gpio_cd.dev)
+		return 1;
+
+	return dm_gpio_get_value(&host->gpio_cd);
+}
+
+static int msdc_ops_get_wp(struct udevice *dev)
+{
+	struct msdc_host *host = dev_get_priv(dev);
+
+	if (!host->gpio_wp.dev)
+		return 0;
+
+	return !dm_gpio_get_value(&host->gpio_wp);
+}
+#endif
+
+#ifdef MMC_SUPPORTS_TUNING
+static u32 test_delay_bit(u32 delay, u32 bit)
+{
+	bit %= PAD_DELAY_MAX;
+	return delay & (1 << bit);
+}
+
+static int get_delay_len(u32 delay, u32 start_bit)
+{
+	int i;
+
+	for (i = 0; i < (PAD_DELAY_MAX - start_bit); i++) {
+		if (test_delay_bit(delay, start_bit + i) == 0)
+			return i;
+	}
+
+	return PAD_DELAY_MAX - start_bit;
+}
+
+static struct msdc_delay_phase get_best_delay(struct msdc_host *host, u32 delay)
+{
+	int start = 0, len = 0;
+	int start_final = 0, len_final = 0;
+	u8 final_phase = 0xff;
+	struct msdc_delay_phase delay_phase = { 0, };
+
+	if (delay == 0) {
+		dev_err(dev, "phase error: [map:%x]\n", delay);
+		delay_phase.final_phase = final_phase;
+		return delay_phase;
+	}
+
+	while (start < PAD_DELAY_MAX) {
+		len = get_delay_len(delay, start);
+		if (len_final < len) {
+			start_final = start;
+			len_final = len;
+		}
+
+		start += len ? len : 1;
+		if (len >= 12 && start_final < 4)
+			break;
+	}
+
+	/* The rule is to find the smallest delay cell */
+	if (start_final == 0)
+		final_phase = (start_final + len_final / 3) % PAD_DELAY_MAX;
+	else
+		final_phase = (start_final + len_final / 2) % PAD_DELAY_MAX;
+
+	dev_info(dev, "phase: [map:%x] [maxlen:%d] [final:%d]\n",
+		 delay, len_final, final_phase);
+
+	delay_phase.maxlen = len_final;
+	delay_phase.start = start_final;
+	delay_phase.final_phase = final_phase;
+	return delay_phase;
+}
+
+static int msdc_tune_response(struct udevice *dev, u32 opcode)
+{
+	struct msdc_plat *plat = dev_get_platdata(dev);
+	struct msdc_host *host = dev_get_priv(dev);
+	struct mmc *mmc = &plat->mmc;
+	u32 rise_delay = 0, fall_delay = 0;
+	struct msdc_delay_phase final_rise_delay, final_fall_delay = { 0, };
+	struct msdc_delay_phase internal_delay_phase;
+	u8 final_delay, final_maxlen;
+	u32 internal_delay = 0;
+	u32 tune_reg = MSDC_PAD_TUNE;
+	int cmd_err;
+	int i, j;
+
+	if (host->dev_comp->pad_tune0)
+		tune_reg = MSDC_PAD_TUNE0;
+
+	if (mmc->selected_mode == MMC_HS_200 ||
+	    mmc->selected_mode == UHS_SDR104)
+		clrsetbits_le32(host->base + tune_reg,
+				MSDC_PAD_TUNE_CMDRRDLY_M <<
+				MSDC_PAD_TUNE_CMDRRDLY_S,
+				host->hs200_cmd_int_delay <<
+				MSDC_PAD_TUNE_CMDRRDLY_S);
+
+	clrbits_le32(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
+
+	for (i = 0; i < PAD_DELAY_MAX; i++) {
+		clrsetbits_le32(host->base + tune_reg,
+				MSDC_PAD_TUNE_CMDRDLY_M <<
+				MSDC_PAD_TUNE_CMDRDLY_S,
+				i << MSDC_PAD_TUNE_CMDRDLY_S);
+
+		for (j = 0; j < 3; j++) {
+			mmc_send_tuning(mmc, opcode, &cmd_err);
+			if (!cmd_err) {
+				rise_delay |= (1 << i);
+			} else {
+				rise_delay &= ~(1 << i);
+				break;
+			}
+		}
+	}
+
+	final_rise_delay = get_best_delay(host, rise_delay);
+	/* if rising edge has enough margin, do not scan falling edge */
+	if (final_rise_delay.maxlen >= 12 ||
+	    (final_rise_delay.start == 0 && final_rise_delay.maxlen >= 4))
+		goto skip_fall;
+
+	setbits_le32(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
+	for (i = 0; i < PAD_DELAY_MAX; i++) {
+		clrsetbits_le32(host->base + tune_reg,
+				MSDC_PAD_TUNE_CMDRDLY_M <<
+				MSDC_PAD_TUNE_CMDRDLY_S,
+				i << MSDC_PAD_TUNE_CMDRDLY_S);
+
+		for (j = 0; j < 3; j++) {
+			mmc_send_tuning(mmc, opcode, &cmd_err);
+			if (!cmd_err) {
+				fall_delay |= (1 << i);
+			} else {
+				fall_delay &= ~(1 << i);
+				break;
+			}
+		}
+	}
+
+	final_fall_delay = get_best_delay(host, fall_delay);
+
+skip_fall:
+	final_maxlen = max(final_rise_delay.maxlen, final_fall_delay.maxlen);
+	if (final_maxlen == final_rise_delay.maxlen) {
+		clrbits_le32(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
+		clrsetbits_le32(host->base + tune_reg,
+				MSDC_PAD_TUNE_CMDRDLY_M <<
+				MSDC_PAD_TUNE_CMDRDLY_S,
+				final_rise_delay.final_phase <<
+				MSDC_PAD_TUNE_CMDRDLY_S);
+		final_delay = final_rise_delay.final_phase;
+	} else {
+		setbits_le32(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
+		clrsetbits_le32(host->base + tune_reg,
+				MSDC_PAD_TUNE_CMDRDLY_M <<
+				MSDC_PAD_TUNE_CMDRDLY_S,
+				final_fall_delay.final_phase <<
+				MSDC_PAD_TUNE_CMDRDLY_S);
+		final_delay = final_fall_delay.final_phase;
+	}
+
+	if (host->dev_comp->async_fifo || host->hs200_cmd_int_delay)
+		goto skip_internal;
+
+	for (i = 0; i < PAD_DELAY_MAX; i++) {
+		clrsetbits_le32(host->base + tune_reg,
+				MSDC_PAD_TUNE_CMDRRDLY_M <<
+				MSDC_PAD_TUNE_CMDRRDLY_S,
+				i << MSDC_PAD_TUNE_CMDRRDLY_S);
+
+		mmc_send_tuning(mmc, opcode, &cmd_err);
+		if (!cmd_err)
+			internal_delay |= (1 << i);
+	}
+
+	dev_err(dev, "Final internal delay: 0x%x\n", internal_delay);
+
+	internal_delay_phase = get_best_delay(host, internal_delay);
+	clrsetbits_le32(host->base + tune_reg,
+			MSDC_PAD_TUNE_CMDRRDLY_M <<
+			MSDC_PAD_TUNE_CMDRRDLY_S,
+			internal_delay_phase.final_phase <<
+			MSDC_PAD_TUNE_CMDRRDLY_S);
+
+skip_internal:
+	dev_err(dev, "Final cmd pad delay: %x\n", final_delay);
+	return final_delay == 0xff ? -EIO : 0;
+}
+
+static int msdc_tune_data(struct udevice *dev, u32 opcode)
+{
+	struct msdc_plat *plat = dev_get_platdata(dev);
+	struct msdc_host *host = dev_get_priv(dev);
+	struct mmc *mmc = &plat->mmc;
+	u32 rise_delay = 0, fall_delay = 0;
+	struct msdc_delay_phase final_rise_delay, final_fall_delay = { 0, };
+	u8 final_delay, final_maxlen;
+	u32 tune_reg = MSDC_PAD_TUNE;
+	int cmd_err;
+	int i, ret;
+
+	if (host->dev_comp->pad_tune0)
+		tune_reg = MSDC_PAD_TUNE0;
+
+	clrbits_le32(host->base + MSDC_IOCON, MSDC_IOCON_DSPL);
+	clrbits_le32(host->base + MSDC_IOCON, MSDC_IOCON_W_DSPL);
+
+	for (i = 0; i < PAD_DELAY_MAX; i++) {
+		clrsetbits_le32(host->base + tune_reg,
+				MSDC_PAD_TUNE_DATRRDLY_M <<
+				MSDC_PAD_TUNE_DATRRDLY_S,
+				i << MSDC_PAD_TUNE_DATRRDLY_S);
+
+		ret = mmc_send_tuning(mmc, opcode, &cmd_err);
+		if (!ret) {
+			rise_delay |= (1 << i);
+		} else if (cmd_err) {
+			/* in this case, retune response is needed */
+			ret = msdc_tune_response(dev, opcode);
+			if (ret)
+				break;
+		}
+	}
+
+	final_rise_delay = get_best_delay(host, rise_delay);
+	if (final_rise_delay.maxlen >= 12 ||
+	    (final_rise_delay.start == 0 && final_rise_delay.maxlen >= 4))
+		goto skip_fall;
+
+	setbits_le32(host->base + MSDC_IOCON, MSDC_IOCON_DSPL);
+	setbits_le32(host->base + MSDC_IOCON, MSDC_IOCON_W_DSPL);
+
+	for (i = 0; i < PAD_DELAY_MAX; i++) {
+		clrsetbits_le32(host->base + tune_reg,
+				MSDC_PAD_TUNE_DATRRDLY_M <<
+				MSDC_PAD_TUNE_DATRRDLY_S,
+				i << MSDC_PAD_TUNE_DATRRDLY_S);
+
+		ret = mmc_send_tuning(mmc, opcode, &cmd_err);
+		if (!ret) {
+			fall_delay |= (1 << i);
+		} else if (cmd_err) {
+			/* in this case, retune response is needed */
+			ret = msdc_tune_response(dev, opcode);
+			if (ret)
+				break;
+		}
+	}
+
+	final_fall_delay = get_best_delay(host, fall_delay);
+
+skip_fall:
+	final_maxlen = max(final_rise_delay.maxlen, final_fall_delay.maxlen);
+	if (final_maxlen == final_rise_delay.maxlen) {
+		clrbits_le32(host->base + MSDC_IOCON, MSDC_IOCON_DSPL);
+		clrbits_le32(host->base + MSDC_IOCON, MSDC_IOCON_W_DSPL);
+		clrsetbits_le32(host->base + tune_reg,
+				MSDC_PAD_TUNE_DATRRDLY_M <<
+				MSDC_PAD_TUNE_DATRRDLY_S,
+				final_rise_delay.final_phase <<
+				MSDC_PAD_TUNE_DATRRDLY_S);
+		final_delay = final_rise_delay.final_phase;
+	} else {
+		setbits_le32(host->base + MSDC_IOCON, MSDC_IOCON_DSPL);
+		setbits_le32(host->base + MSDC_IOCON, MSDC_IOCON_W_DSPL);
+		clrsetbits_le32(host->base + tune_reg,
+				MSDC_PAD_TUNE_DATRRDLY_M <<
+				MSDC_PAD_TUNE_DATRRDLY_S,
+				final_fall_delay.final_phase <<
+				MSDC_PAD_TUNE_DATRRDLY_S);
+		final_delay = final_fall_delay.final_phase;
+	}
+
+	if (mmc->selected_mode == MMC_HS_200 ||
+	    mmc->selected_mode == UHS_SDR104)
+		clrsetbits_le32(host->base + tune_reg,
+				MSDC_PAD_TUNE_DATWRDLY_M <<
+				MSDC_PAD_TUNE_DATWRDLY_S,
+				host->hs200_write_int_delay <<
+				MSDC_PAD_TUNE_DATWRDLY_S);
+
+	dev_err(dev, "Final data pad delay: %x\n", final_delay);
+
+	return final_delay == 0xff ? -EIO : 0;
+}
+
+static int msdc_execute_tuning(struct udevice *dev, uint opcode)
+{
+	struct msdc_plat *plat = dev_get_platdata(dev);
+	struct msdc_host *host = dev_get_priv(dev);
+	struct mmc *mmc = &plat->mmc;
+	int ret;
+
+	if (mmc->selected_mode == MMC_HS_400) {
+		writel(host->hs400_ds_delay, host->base + PAD_DS_TUNE);
+		/* for hs400 mode it must be set to 0 */
+		clrbits_le32(host->base + MSDC_PATCH_BIT2, MSDC_PB2_CFGCRCSTS);
+		host->hs400_mode = true;
+	}
+
+	ret = msdc_tune_response(dev, opcode);
+	if (ret == -EIO) {
+		dev_err(dev, "Tune response fail!\n");
+		return ret;
+	}
+
+	if (!host->hs400_mode) {
+		ret = msdc_tune_data(dev, opcode);
+		if (ret == -EIO)
+			dev_err(dev, "Tune data fail!\n");
+	}
+
+	host->saved_tune_para.iocon = readl(host->base + MSDC_IOCON);
+	host->saved_tune_para.pad_tune = readl(host->base + MSDC_PAD_TUNE);
+
+	return ret;
+}
+#endif
+
+static void msdc_init_hw(struct msdc_host *host)
+{
+	u32 val;
+	u32 tune_reg = MSDC_PAD_TUNE;
+
+	if (host->dev_comp->pad_tune0)
+		tune_reg = MSDC_PAD_TUNE0;
+
+	/* Configure to MMC/SD mode, clock free running */
+	setbits_le32(host->base + MSDC_CFG, MSDC_CFG_MODE);
+
+	/* Use PIO mode */
+	setbits_le32(host->base + MSDC_CFG, MSDC_CFG_PIO);
+
+	/* Reset */
+	msdc_reset_hw(host);
+
+	/* Disable card detection */
+	clrbits_le32(host->base + MSDC_PS, MSDC_PS_CDEN);
+
+	/* Clear all interrupts */
+	val = readl(host->base + MSDC_INT);
+	writel(val, host->base + MSDC_INT);
+
+	/* Enable data & cmd interrupts */
+	writel(DATA_INTS_MASK | CMD_INTS_MASK, host->base + MSDC_INTEN);
+
+	writel(0, host->base + tune_reg);
+	writel(0, host->base + MSDC_IOCON);
+
+	if (host->r_smpl)
+		setbits_le32(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
+	else
+		clrbits_le32(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
+
+	writel(0x403c0046, host->base + MSDC_PATCH_BIT);
+	writel(0xffff4089, host->base + MSDC_PATCH_BIT1);
+
+	if (host->dev_comp->stop_clk_fix)
+		clrsetbits_le32(host->base + MSDC_PATCH_BIT1,
+				MSDC_PB1_STOP_DLY_M << MSDC_PB1_STOP_DLY_S,
+				3 << MSDC_PB1_STOP_DLY_S);
+
+	if (host->dev_comp->busy_check)
+		clrbits_le32(host->base + MSDC_PATCH_BIT1, (1 << 7));
+
+	setbits_le32(host->base + EMMC50_CFG0, EMMC50_CFG_CFCSTS_SEL);
+
+	if (host->dev_comp->async_fifo) {
+		clrsetbits_le32(host->base + MSDC_PATCH_BIT2,
+				MSDC_PB2_RESPWAIT_M << MSDC_PB2_RESPWAIT_S,
+				3 << MSDC_PB2_RESPWAIT_S);
+
+		if (host->dev_comp->enhance_rx) {
+			setbits_le32(host->base + SDC_ADV_CFG0,
+				     SDC_RX_ENHANCE_EN);
+		} else {
+			clrsetbits_le32(host->base + MSDC_PATCH_BIT2,
+					MSDC_PB2_RESPSTSENSEL_M <<
+					MSDC_PB2_RESPSTSENSEL_S,
+					2 << MSDC_PB2_RESPSTSENSEL_S);
+			clrsetbits_le32(host->base + MSDC_PATCH_BIT2,
+					MSDC_PB2_CRCSTSENSEL_M <<
+					MSDC_PB2_CRCSTSENSEL_S,
+					2 << MSDC_PB2_CRCSTSENSEL_S);
+		}
+
+		/* use async fifo to avoid tune internal delay */
+		clrbits_le32(host->base + MSDC_PATCH_BIT2,
+			     MSDC_PB2_CFGRESP);
+		clrbits_le32(host->base + MSDC_PATCH_BIT2,
+			     MSDC_PB2_CFGCRCSTS);
+	}
+
+	if (host->dev_comp->data_tune) {
+		setbits_le32(host->base + tune_reg,
+			     MSDC_PAD_TUNE_RD_SEL | MSDC_PAD_TUNE_CMD_SEL);
+		clrsetbits_le32(host->base + MSDC_PATCH_BIT,
+				MSDC_INT_DAT_LATCH_CK_SEL_S <<
+				MSDC_INT_DAT_LATCH_CK_SEL_M,
+				host->latch_ck <<
+				MSDC_INT_DAT_LATCH_CK_SEL_S);
+	} else {
+		/* choose clock tune */
+		setbits_le32(host->base + tune_reg, MSDC_PAD_TUNE_RXDLYSEL);
+	}
+
+	/* Configure to enable SDIO mode otherwise sdio cmd5 won't work */
+	setbits_le32(host->base + SDC_CFG, SDC_CFG_SDIO);
+
+	/* disable detecting SDIO device interrupt function */
+	clrbits_le32(host->base + SDC_CFG, SDC_CFG_SDIOIDE);
+
+	/* Configure to default data timeout */
+	clrsetbits_le32(host->base + SDC_CFG,
+			SDC_CFG_DTOC_M << SDC_CFG_DTOC_S,
+			3 << SDC_CFG_DTOC_S);
+
+	if (host->dev_comp->stop_clk_fix) {
+		clrbits_le32(host->base + SDC_FIFO_CFG,
+			     SDC_FIFO_CFG_WRVALIDSEL);
+		clrbits_le32(host->base + SDC_FIFO_CFG,
+			     SDC_FIFO_CFG_RDVALIDSEL);
+	}
+
+	host->def_tune_para.iocon = readl(host->base + MSDC_IOCON);
+	host->def_tune_para.pad_tune = readl(host->base + MSDC_PAD_TUNE);
+}
+
+static void msdc_ungate_clock(struct msdc_host *host)
+{
+	clk_enable(&host->src_clk);
+	clk_enable(&host->h_clk);
+}
+
+static int msdc_drv_probe(struct udevice *dev)
+{
+	struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
+	struct msdc_plat *plat = dev_get_platdata(dev);
+	struct msdc_host *host = dev_get_priv(dev);
+	struct mmc_config *cfg = &plat->cfg;
+	int ret;
+
+	cfg->name = dev->name;
+
+	host->base = (void *)dev_read_addr(dev);
+	if (!host->base)
+		return -EINVAL;
+
+	ret = mmc_of_parse(dev, cfg);
+	if (ret)
+		return ret;
+
+	ret = clk_get_by_name(dev, "source", &host->src_clk);
+	if (ret < 0)
+		return ret;
+
+	ret = clk_get_by_name(dev, "hclk", &host->h_clk);
+	if (ret < 0)
+		return ret;
+
+	gpio_request_by_name(dev, "wp-gpios", 0, &host->gpio_wp, GPIOD_IS_IN);
+	gpio_request_by_name(dev, "cd-gpios", 0, &host->gpio_cd, GPIOD_IS_IN);
+
+	host->hs400_ds_delay = dev_read_u32_default(dev, "hs400-ds-delay", 0);
+	host->hs200_cmd_int_delay =
+			dev_read_u32_default(dev, "cmd_int_delay", 0);
+	host->hs200_write_int_delay =
+			dev_read_u32_default(dev, "write_int_delay", 0);
+	host->latch_ck = dev_read_u32_default(dev, "latch-ck", 0);
+	host->r_smpl = dev_read_u32_default(dev, "r_smpl", 0);
+
+	host->dev_comp = (struct msdc_compatible *)dev_get_driver_data(dev);
+
+	host->src_clk_freq = clk_get_rate(&host->src_clk);
+
+	if (host->dev_comp->clk_div_bits == 8)
+		cfg->f_min = host->src_clk_freq / (4 * 255);
+	else
+		cfg->f_min = host->src_clk_freq / (4 * 4095);
+
+	cfg->b_max = 1024;
+	cfg->voltages = MMC_VDD_32_33 | MMC_VDD_33_34;
+
+	host->mmc = &plat->mmc;
+	host->timeout_ns = 100000000;
+	host->timeout_clks = 3 * 1048576;
+
+	pinctrl_select_state(dev, "default");
+
+	msdc_ungate_clock(host);
+	msdc_init_hw(host);
+
+	upriv->mmc = &plat->mmc;
+
+	return 0;
+}
+
+static int msdc_drv_bind(struct udevice *dev)
+{
+	struct msdc_plat *plat = dev_get_platdata(dev);
+
+	return mmc_bind(dev, &plat->mmc, &plat->cfg);
+}
+
+static const struct dm_mmc_ops msdc_ops = {
+	.send_cmd = msdc_ops_send_cmd,
+	.set_ios = msdc_ops_set_ios,
+#ifdef CONFIG_DM_GPIO
+	.get_cd = msdc_ops_get_cd,
+	.get_wp = msdc_ops_get_wp,
+#endif
+#ifdef MMC_SUPPORTS_TUNING
+	.execute_tuning = msdc_execute_tuning,
+#endif
+};
+
+static const struct msdc_compatible mt7623_compat = {
+	.clk_div_bits = 12,
+	.pad_tune0 = true,
+	.async_fifo = true,
+	.data_tune = true,
+	.busy_check = false,
+	.stop_clk_fix = false,
+	.enhance_rx = false
+};
+
+static const struct udevice_id msdc_ids[] = {
+	{ .compatible = "mediatek,mt7623-mmc", .data = (ulong)&mt7623_compat },
+	{}
+};
+
+U_BOOT_DRIVER(mtk_sd_drv) = {
+	.name = "mtk_sd",
+	.id = UCLASS_MMC,
+	.of_match = msdc_ids,
+	.bind = msdc_drv_bind,
+	.probe = msdc_drv_probe,
+	.ops = &msdc_ops,
+	.platdata_auto_alloc_size = sizeof(struct msdc_plat),
+	.priv_auto_alloc_size = sizeof(struct msdc_host),
+};
-- 
1.9.1