diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
index 264e11fa58ea..c1be4b6e1411 100644
--- a/drivers/mmc/host/Kconfig
+++ b/drivers/mmc/host/Kconfig
@@ -160,6 +160,53 @@ config MMC_SDHCI_PLTFM
 
 	  If unsure, say N.
 
+config MMC_EIC7700
+	tristate "support for the EIC7700 controllers"
+	depends on MMC_SDHCI_PLTFM
+	depends on OF
+	depends on COMMON_CLK
+	depends on ARCH_ESWIN || COMPILE_TEST
+	select MMC_CQHCI
+	help
+	  This selects the EIC7700 Secure Digital Host Controller Interface
+	  (SDHCI).
+
+	  If you have a controller with this interface, say Y or M here.
+
+	  If unsure, say N.
+
+config MMC_SDHCI_OF_EIC7700
+	tristate "SDHCI OF support for the EIC7700 SDHCI controllers"
+	depends on MMC_SDHCI_PLTFM
+	depends on OF
+	depends on COMMON_CLK
+	depends on ARCH_ESWIN || COMPILE_TEST
+	depends on MMC_EIC7700
+	select MMC_CQHCI
+	help
+	  This selects the EIC7700 Secure Digital Host Controller Interface
+	  (SDHCI).
+
+	  If you have a controller with this interface, say Y or M here.
+
+	  If unsure, say N.
+
+config MMC_SDHCI_OF_SDIO_EIC7700
+	tristate "SDHCI OF SDIO support for the EIC7700 SDHCI controllers"
+	depends on MMC_SDHCI_PLTFM
+	depends on OF
+	depends on COMMON_CLK
+	depends on ARCH_ESWIN || COMPILE_TEST
+	depends on MMC_EIC7700
+	select MMC_CQHCI
+	help
+	 This selects the EIC7700 Secure Digital Host Controller Interface
+	 (SDHCI-SDIO).
+
+	 If you have a controller with this interface, say Y or M here.
+
+	 If unsure, say N.
+
 config MMC_SDHCI_OF_ARASAN
 	tristate "SDHCI OF support for the Arasan SDHCI controllers"
 	depends on MMC_SDHCI_PLTFM
diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile
index 5147467ec825..4ba3962f90b8 100644
--- a/drivers/mmc/host/Makefile
+++ b/drivers/mmc/host/Makefile
@@ -105,7 +105,9 @@ cqhci-y					+= cqhci-core.o
 cqhci-$(CONFIG_MMC_CRYPTO)		+= cqhci-crypto.o
 obj-$(CONFIG_MMC_HSQ)			+= mmc_hsq.o
 obj-$(CONFIG_MMC_LITEX)			+= litex_mmc.o
-
+obj-$(CONFIG_MMC_EIC7700)                 += sdhci-eic7700.o
+obj-$(CONFIG_MMC_SDHCI_OF_EIC7700)        += sdhci-of-eic7700.o
+obj-$(CONFIG_MMC_SDHCI_OF_SDIO_EIC7700)   += sdhci-of-eic7700-sdio.o
 ifeq ($(CONFIG_CB710_DEBUG),y)
 	CFLAGS-cb710-mmc	+= -DDEBUG
 endif
diff --git a/drivers/mmc/host/sdhci-eic7700.c b/drivers/mmc/host/sdhci-eic7700.c
new file mode 100644
index 000000000000..84a7a1186b90
--- /dev/null
+++ b/drivers/mmc/host/sdhci-eic7700.c
@@ -0,0 +1,353 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * ESWIN Emmc Driver
+ *
+ * Copyright 2024, Beijing ESWIN Computing Technology Co., Ltd.. All rights reserved.
+ *
+ * Authors:
+ *	Shuang Liang <liangshuang@eswincomputing.com>
+ *	Xuyang Dong <dongxuyang@eswincomputing.com>
+ */
+#include "sdhci-eic7700.h"
+#include <linux/delay.h>
+#include <linux/regmap.h>
+#include <linux/reset.h>
+
+static void eswin_mshc_coreclk_config(struct sdhci_host *host, uint16_t divisor,
+				      unsigned int flag_sel)
+{
+	struct sdhci_pltfm_host *pltfm_host;
+	struct eswin_sdhci_data *eswin_sdhci;
+	u32 val = 0;
+	u32 delay = 0xfffff;
+
+	pltfm_host = sdhci_priv(host);
+	eswin_sdhci = sdhci_pltfm_priv(pltfm_host);
+
+	regmap_read(eswin_sdhci->crg_regmap, eswin_sdhci->crg_core_clk, &val);
+	val &= ~MSHC_CORE_CLK_ENABLE;
+	regmap_write(eswin_sdhci->crg_regmap, eswin_sdhci->crg_core_clk, val);
+	while (delay--)
+		;
+	val &= ~(MSHC_CORE_CLK_FREQ_BIT_MASK << MSHC_CORE_CLK_FREQ_BIT_SHIFT);
+	val |= (divisor & MSHC_CORE_CLK_FREQ_BIT_MASK)
+	       << MSHC_CORE_CLK_FREQ_BIT_SHIFT;
+	val &= ~(MSHC_CORE_CLK_SEL_BIT);
+	val |= flag_sel;
+	regmap_write(eswin_sdhci->crg_regmap, eswin_sdhci->crg_core_clk, val);
+
+	udelay(100);
+	val |= MSHC_CORE_CLK_ENABLE;
+	regmap_write(eswin_sdhci->crg_regmap, eswin_sdhci->crg_core_clk, val);
+	mdelay(1);
+}
+
+static void eswin_mshc_coreclk_disable(struct sdhci_host *host)
+{
+	struct sdhci_pltfm_host *pltfm_host;
+	struct eswin_sdhci_data *eswin_sdhci;
+	u32 val = 0;
+
+	pltfm_host = sdhci_priv(host);
+	eswin_sdhci = sdhci_pltfm_priv(pltfm_host);
+
+	regmap_read(eswin_sdhci->crg_regmap, eswin_sdhci->crg_core_clk, &val);
+	val &= ~MSHC_CORE_CLK_ENABLE;
+	regmap_write(eswin_sdhci->crg_regmap, eswin_sdhci->crg_core_clk, val);
+}
+
+void eswin_sdhci_disable_card_clk(struct sdhci_host *host)
+{
+	unsigned int clk;
+
+	/* Reset SD Clock Enable */
+	clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
+	clk &= ~SDHCI_CLOCK_CARD_EN;
+	sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
+}
+
+void eswin_sdhci_enable_card_clk(struct sdhci_host *host)
+{
+	ktime_t timeout;
+	unsigned int clk;
+
+	clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
+
+	clk |= SDHCI_CLOCK_INT_EN;
+	sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
+
+	/* Wait max 150 ms */
+	timeout = ktime_add_ms(ktime_get(), 150);
+	while (1) {
+		bool timedout = ktime_after(ktime_get(), timeout);
+
+		clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
+		if (clk & SDHCI_CLOCK_INT_STABLE)
+			break;
+		if (timedout) {
+			pr_err("%s: Internal clock never stabilised.\n",
+			       mmc_hostname(host->mmc));
+			return;
+		}
+		udelay(10);
+	}
+
+	clk |= SDHCI_CLOCK_CARD_EN;
+	sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
+	mdelay(1);
+}
+
+void eswin_sdhci_set_core_clock(struct sdhci_host *host, unsigned int clock)
+{
+	unsigned int div, divide;
+	unsigned int flag_sel, max_clk;
+
+	host->mmc->actual_clock = clock;
+
+	if (clock == 0) {
+		eswin_mshc_coreclk_disable(host);
+		return;
+	}
+
+	if (SDHCI_CLK_208M % clock == 0) {
+		flag_sel = 1;
+		max_clk = SDHCI_CLK_208M;
+	} else {
+		flag_sel = 0;
+		max_clk = SDHCI_CLK_200M;
+	}
+
+	for (div = 1; div <= MAX_CORE_CLK_DIV; div++) {
+		if ((max_clk / div) <= clock)
+			break;
+	}
+	div--;
+
+	if (div == 0 || div == 1)
+		divide = 2;
+	else
+		divide = (div + 1) * 2;
+
+	pr_debug("%s: clock:%d timing:%d\n", mmc_hostname(host->mmc), clock,
+		 host->timing);
+
+	eswin_sdhci_disable_card_clk(host);
+	eswin_mshc_coreclk_config(host, divide, flag_sel);
+	eswin_sdhci_enable_card_clk(host);
+	mdelay(2);
+}
+
+static void eswin_sdhci_set_clk_delays(struct sdhci_host *host)
+{
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct eswin_sdhci_data *eswin_sdhci = sdhci_pltfm_priv(pltfm_host);
+	struct eswin_sdhci_clk_data *clk_data = &eswin_sdhci->clk_data;
+
+	clk_set_phase(clk_data->sampleclk,
+		      clk_data->clk_phase_in[host->timing]);
+	clk_set_phase(clk_data->sdcardclk,
+		      clk_data->clk_phase_out[host->timing]);
+}
+
+static void eswin_sdhci_dt_read_clk_phase(struct device *dev,
+					  struct eswin_sdhci_clk_data *clk_data,
+					  unsigned int timing, const char *prop)
+{
+	struct device_node *np = dev->of_node;
+
+	int clk_phase[2] = {0};
+
+	/*
+	 * Read Tap Delay values from DT, if the DT does not contain the
+	 * Tap Values then use the pre-defined values.
+	 */
+	if (of_property_read_variable_u32_array(np, prop, &clk_phase[0], 2,
+						0)) {
+		dev_dbg(dev, "Using predefined clock phase for %s = %d %d\n",
+			prop, clk_data->clk_phase_in[timing],
+			clk_data->clk_phase_out[timing]);
+		return;
+	}
+
+	/* The values read are Input and Output Clock Delays in order */
+	clk_data->clk_phase_in[timing] = clk_phase[0];
+	clk_data->clk_phase_out[timing] = clk_phase[1];
+}
+
+/**
+ * eswin_sdhci_dt_parse_clk_phases - Read Clock Delay values from DT
+ *
+ * @dev:        Pointer to our struct device.
+ * @clk_data:       Pointer to the Clock Data structure
+ *
+ * Called at initialization to parse the values of Clock Delays.
+ */
+void eswin_sdhci_dt_parse_clk_phases(struct device *dev,
+				     struct eswin_sdhci_clk_data *clk_data)
+{
+	clk_data->set_clk_delays = eswin_sdhci_set_clk_delays;
+
+	eswin_sdhci_dt_read_clk_phase(dev, clk_data, MMC_TIMING_LEGACY,
+				      "clk-phase-legacy");
+	eswin_sdhci_dt_read_clk_phase(dev, clk_data, MMC_TIMING_MMC_HS,
+				      "clk-phase-mmc-hs");
+	eswin_sdhci_dt_read_clk_phase(dev, clk_data, MMC_TIMING_SD_HS,
+				      "clk-phase-sd-hs");
+	eswin_sdhci_dt_read_clk_phase(dev, clk_data, MMC_TIMING_UHS_SDR12,
+				      "clk-phase-uhs-sdr12");
+	eswin_sdhci_dt_read_clk_phase(dev, clk_data, MMC_TIMING_UHS_SDR25,
+				      "clk-phase-uhs-sdr25");
+	eswin_sdhci_dt_read_clk_phase(dev, clk_data, MMC_TIMING_UHS_SDR50,
+				      "clk-phase-uhs-sdr50");
+	eswin_sdhci_dt_read_clk_phase(dev, clk_data, MMC_TIMING_UHS_SDR104,
+				      "clk-phase-uhs-sdr104");
+	eswin_sdhci_dt_read_clk_phase(dev, clk_data, MMC_TIMING_UHS_DDR50,
+				      "clk-phase-uhs-ddr50");
+	eswin_sdhci_dt_read_clk_phase(dev, clk_data, MMC_TIMING_MMC_DDR52,
+				      "clk-phase-mmc-ddr52");
+	eswin_sdhci_dt_read_clk_phase(dev, clk_data, MMC_TIMING_MMC_HS200,
+				      "clk-phase-mmc-hs200");
+	eswin_sdhci_dt_read_clk_phase(dev, clk_data, MMC_TIMING_MMC_HS400,
+				      "clk-phase-mmc-hs400");
+}
+
+unsigned int eswin_convert_drive_impedance_ohm(struct platform_device *pdev,
+					       unsigned int dr_ohm)
+{
+	switch (dr_ohm) {
+	case 100:
+		return PHYCTRL_DR_100OHM;
+	case 66:
+		return PHYCTRL_DR_66OHM;
+	case 50:
+		return PHYCTRL_DR_50OHM;
+	case 40:
+		return PHYCTRL_DR_40OHM;
+	case 33:
+		return PHYCTRL_DR_33OHM;
+	}
+
+	dev_warn(&pdev->dev, "Invalid value %u for drive-impedance-ohm.\n",
+		 dr_ohm);
+	return PHYCTRL_DR_50OHM;
+}
+
+static void eswin_sdhci_do_reset(struct eswin_sdhci_data *eswin_sdhci)
+{
+	int ret;
+
+	ret = reset_control_assert(eswin_sdhci->txrx_rst);
+	WARN_ON(ret != 0);
+	ret = reset_control_assert(eswin_sdhci->phy_rst);
+	WARN_ON(ret != 0);
+	ret = reset_control_assert(eswin_sdhci->prstn);
+	WARN_ON(ret != 0);
+	ret = reset_control_assert(eswin_sdhci->arstn);
+	WARN_ON(ret != 0);
+
+	mdelay(2);
+
+	ret = reset_control_deassert(eswin_sdhci->txrx_rst);
+	WARN_ON(ret != 0);
+	ret = reset_control_deassert(eswin_sdhci->phy_rst);
+	WARN_ON(ret != 0);
+	ret = reset_control_deassert(eswin_sdhci->prstn);
+	WARN_ON(ret != 0);
+	ret = reset_control_deassert(eswin_sdhci->arstn);
+	WARN_ON(ret != 0);
+}
+
+int eswin_sdhci_reset_init(struct device *dev,
+			   struct eswin_sdhci_data *eswin_sdhci)
+{
+	int ret = 0;
+
+	eswin_sdhci->txrx_rst =
+		devm_reset_control_get_optional(dev, "txrx_rst");
+	if (IS_ERR_OR_NULL(eswin_sdhci->txrx_rst)) {
+		dev_err_probe(dev, PTR_ERR(eswin_sdhci->txrx_rst),
+			      "txrx_rst reset not found.\n");
+		return -EFAULT;
+	}
+
+	eswin_sdhci->phy_rst = devm_reset_control_get_optional(dev, "phy_rst");
+	if (IS_ERR_OR_NULL(eswin_sdhci->phy_rst)) {
+		dev_err_probe(dev, PTR_ERR(eswin_sdhci->phy_rst),
+			      "phy_rst reset not found.\n");
+		return -EFAULT;
+	}
+
+	eswin_sdhci->prstn = devm_reset_control_get_optional(dev, "prstn");
+	if (IS_ERR_OR_NULL(eswin_sdhci->prstn)) {
+		dev_err_probe(dev, PTR_ERR(eswin_sdhci->prstn),
+			      "prstn reset not found.\n");
+		return -EFAULT;
+	}
+
+	eswin_sdhci->arstn = devm_reset_control_get_optional(dev, "arstn");
+	if (IS_ERR_OR_NULL(eswin_sdhci->arstn)) {
+		dev_err_probe(dev, PTR_ERR(eswin_sdhci->arstn),
+			      "arstn reset not found.\n");
+		return -EFAULT;
+	}
+	eswin_sdhci_do_reset(eswin_sdhci);
+
+	return ret;
+}
+
+#define DRIVER_NAME "sdhci_esw"
+#define SDHCI_ESW_DUMP(f, x...)                                                \
+	pr_err("%s: " DRIVER_NAME ": " f, mmc_hostname(host->mmc), ##x)
+
+void eswin_sdhci_dump_vendor_regs(struct sdhci_host *host)
+{
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct eswin_sdhci_data *eswin_sdhci = sdhci_pltfm_priv(pltfm_host);
+	int ret;
+	u32 val = 0, val1 = 0;
+
+	SDHCI_ESW_DUMP("----------- VENDOR REGISTER DUMP -----------\n");
+
+	ret = regmap_read(eswin_sdhci->crg_regmap, eswin_sdhci->crg_core_clk,
+			  &val);
+	if (ret) {
+		pr_err("%s: read crg_core_clk failed, ret:%d\n",
+		       mmc_hostname(host->mmc), ret);
+		return;
+	}
+
+	SDHCI_ESW_DUMP("CORE CLK: 0x%08x | IRQ FLAG:  0x%016lx\n", val,
+		       arch_local_save_flags());
+
+	ret = regmap_read(eswin_sdhci->crg_regmap, eswin_sdhci->crg_aclk_ctrl,
+			  &val);
+	if (ret) {
+		pr_err("%s: read crg_aclk_ctrl failed, ret:%d\n",
+		       mmc_hostname(host->mmc), ret);
+		return;
+	}
+	ret = regmap_read(eswin_sdhci->crg_regmap, eswin_sdhci->crg_cfg_ctrl,
+			  &val1);
+	if (ret) {
+		pr_err("%s: read crg_cfg_ctrl failed, ret:%d\n",
+		       mmc_hostname(host->mmc), ret);
+		return;
+	}
+	SDHCI_ESW_DUMP("HSP ACLK: 0x%08x | HSP CFG:  0x%08x\n", val, val1);
+
+	ret = regmap_read(eswin_sdhci->hsp_regmap, eswin_sdhci->hsp_int_status,
+			  &val);
+	if (ret) {
+		pr_err("%s: read hsp_int_status failed, ret:%d\n",
+		       mmc_hostname(host->mmc), ret);
+		return;
+	}
+	ret = regmap_read(eswin_sdhci->hsp_regmap, eswin_sdhci->hsp_pwr_ctrl,
+			  &val1);
+	if (ret) {
+		pr_err("%s: read hsp_pwr_ctrl failed, ret:%d\n",
+		       mmc_hostname(host->mmc), ret);
+		return;
+	}
+	SDHCI_ESW_DUMP("HSP STA: 0x%08x | PWR CTRL:  0x%08x\n", val, val1);
+}
diff --git a/drivers/mmc/host/sdhci-eic7700.h b/drivers/mmc/host/sdhci-eic7700.h
new file mode 100644
index 000000000000..4e6f4ac8e7ff
--- /dev/null
+++ b/drivers/mmc/host/sdhci-eic7700.h
@@ -0,0 +1,237 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * ESWIN SDHCI Driver
+ *
+ * Copyright 2024, Beijing ESWIN Computing Technology Co., Ltd.. All rights reserved.
+ *
+ * Authors:
+ *	Shuang Liang <liangshuang@eswincomputing.com>
+ *	Xuyang Dong <dongxuyang@eswincomputing.com>
+ */
+#ifndef _DRIVERS_MMC_SDHCI_ESWIN_H
+#define _DRIVERS_MMC_SDHCI_ESWIN_H
+
+#include "sdhci-pltfm.h"
+#include <linux/clk-provider.h>
+#include <linux/reset.h>
+
+#define MSHC_CARD_CLK_STABLE BIT(28)
+#define MSHC_INT_BCLK_STABLE BIT(16)
+#define MSHC_INT_ACLK_STABLE BIT(8)
+#define MSHC_INT_TMCLK_STABLE BIT(0)
+#define MSHC_INT_CLK_STABLE                                                    \
+	(MSHC_CARD_CLK_STABLE | MSHC_INT_ACLK_STABLE | MSHC_INT_BCLK_STABLE |  \
+	 MSHC_INT_TMCLK_STABLE)
+#define MSHC_HOST_VAL_STABLE BIT(0)
+#define EMMC0_CARD_DETECT BIT(9)
+#define EMMC0_CARD_WRITE_PROT BIT(8)
+
+#define MSHC_CORE_CLK_ENABLE BIT(16)
+#define MSHC_CORE_CLK_FREQ_BIT_SHIFT 4
+#define MSHC_CORE_CLK_FREQ_BIT_MASK 0xfffu
+#define MSHC_CORE_CLK_SEL_BIT BIT(0)
+
+/* Controller does not have CD wired and will not function normally without */
+#define SDHCI_ESWIN_QUIRK_FORCE_CDTEST BIT(0)
+/* Controller immediately reports SDHCI_CLOCK_INT_STABLE after enabling the
+ * internal clock even when the clock isn't stable
+ */
+#define SDHCI_ESWIN_QUIRK_CLOCK_UNSTABLE BIT(1)
+
+#define ESWIN_SDHCI_CTRL_HS400                                                 \
+	0x0007 // Non-standard, for eswin,these bits are 0x7
+
+#define SDHCI_CLK_208M 208000000
+#define SDHCI_CLK_200M 200000000
+
+#define AWSMMUSID GENMASK(31, 24)  // The sid of write operation
+#define AWSMMUSSID GENMASK(23, 16) // The ssid of write operation
+#define ARSMMUSID GENMASK(15, 8)   // The sid of read operation
+#define ARSMMUSSID GENMASK(7, 0)   // The ssid of read operation
+
+/* DWC_mshc_map/DWC_mshc_phy_block register */
+#define DWC_MSHC_PTR_PHY_R 0x300
+#define PHY_CNFG_R (DWC_MSHC_PTR_PHY_R + 0x00)
+#define PHY_CMDPAD_CNFG_R (DWC_MSHC_PTR_PHY_R + 0x04)
+#define PHY_DATAPAD_CNFG_R (DWC_MSHC_PTR_PHY_R + 0x06)
+#define PHY_CLKPAD_CNFG_R (DWC_MSHC_PTR_PHY_R + 0x08)
+#define PHY_STBPAD_CNFG_R (DWC_MSHC_PTR_PHY_R + 0x0a)
+#define PHY_RSTNPAD_CNFG_R (DWC_MSHC_PTR_PHY_R + 0x0c)
+#define PHY_PADTEST_CNFG_R (DWC_MSHC_PTR_PHY_R + 0x0e)
+#define PHY_PADTEST_OUT_R (DWC_MSHC_PTR_PHY_R + 0x10)
+#define PHY_PADTEST_IN_R (DWC_MSHC_PTR_PHY_R + 0x12)
+#define PHY_PRBS_CNFG_R (DWC_MSHC_PTR_PHY_R + 0x18)
+#define PHY_PHYLBK_CNFG_R (DWC_MSHC_PTR_PHY_R + 0x1a)
+#define PHY_COMMDL_CNFG_R (DWC_MSHC_PTR_PHY_R + 0x1c)
+#define PHY_SDCLKDL_CNFG_R (DWC_MSHC_PTR_PHY_R + 0x1d)
+#define PHY_SDCLKDL_DC_R (DWC_MSHC_PTR_PHY_R + 0x1e)
+#define PHY_SMPLDL_CNFG_R (DWC_MSHC_PTR_PHY_R + 0x20)
+#define PHY_ATDL_CNFG_R (DWC_MSHC_PTR_PHY_R + 0x21)
+#define PHY_DLL_CTRL_R (DWC_MSHC_PTR_PHY_R + 0x24)
+#define PHY_DLL_CNFG1_R (DWC_MSHC_PTR_PHY_R + 0x25)
+#define PHY_DLL_CNFG2_R (DWC_MSHC_PTR_PHY_R + 0x26)
+#define PHY_DLLDL_CNFG_R (DWC_MSHC_PTR_PHY_R + 0x28)
+#define PHY_DLL_OFFST_R (DWC_MSHC_PTR_PHY_R + 0x29)
+#define PHY_DLLMST_TSTDC_R (DWC_MSHC_PTR_PHY_R + 0x2a)
+#define PHY_DLLBT_CNFG_R (DWC_MSHC_PTR_PHY_R + 0x2c)
+#define PHY_DLL_STATUS_R (DWC_MSHC_PTR_PHY_R + 0x2e)
+#define PHY_DLLDBG_MLKDC_R (DWC_MSHC_PTR_PHY_R + 0x30)
+#define PHY_DLLDBG_SLKDC_R (DWC_MSHC_PTR_PHY_R + 0x32)
+
+#define ENABLE 1
+#define DISABLE 0
+/* strength definition */
+#define PHYCTRL_DR_33OHM 0xee
+#define PHYCTRL_DR_40OHM 0xcc
+#define PHYCTRL_DR_50OHM 0x88
+#define PHYCTRL_DR_66OHM 0x44
+#define PHYCTRL_DR_100OHM 0x00
+
+#define PHY_PAD_MAX_DRIVE_STRENGTH 0xf
+#define PHY_CLK_MAX_DELAY_MASK 0x7f
+#define PHY_PAD_SP_DRIVE_SHIF 16
+#define PHY_PAD_SN_DRIVE_SHIF 20
+
+#define PHY_RSTN BIT(0)
+#define PHY_UPDATE_DELAY_CODE BIT(4)
+
+#define VENDOR_EMMC_CTRL_R 0x52c
+#define EMMC_CRAD_PRESENT BIT(0)
+#define EMMC_RST_N_OE BIT(3)
+#define EMMC_RST_N BIT(2)
+
+#define PHY_SLEW_0 0x0
+#define PHY_SLEW_1 0x1
+#define PHY_SLEW_2 0x2
+#define PHY_SLEW_3 0x3
+#define PHY_TX_SLEW_CTRL_P_BIT_SHIFT 5
+#define PHY_TX_SLEW_CTRL_N_BIT_SHIFT 9
+
+#define PHY_PULL_BIT_SHIF 0x3
+#define PHY_PULL_DISABLED 0x0
+#define PHY_PULL_UP 0x1
+#define PHY_PULL_DOWN 0x2
+#define PHY_PULL_MASK 0x3
+
+#define PHY_PAD_RXSEL_0 0x0
+#define PHY_PAD_RXSEL_1 0x1
+
+#define VENDOR_AT_CTRL_R 0x540
+#define LATENCY_LT_BIT_OFFSET 19
+#define LATENCY_LT_MASK 0x3
+
+#define LATENCY_LT_1 0x0
+#define LATENCY_LT_2 0x1
+#define LATENCY_LT_3 0x2
+#define LATENCY_LT_4 0x3
+#define SW_TUNE_ENABLE BIT(4)
+
+#define VENDOR_AT_SATA_R 0x544
+#define MAX_PHASE_CODE 0xff
+
+#define DLL_ENABEL BIT(0)
+#define DLL_LOCK_STS BIT(0)
+#define DLL_ERROR_STS BIT(1)
+#define PHY_DELAY_CODE_MASK 0x7f
+#define PHY_DELAY_CODE_MAX 0x7f
+
+#define MAX_CORE_CLK_DIV 0xfff
+
+/**
+ * struct eswin_sdhci_clk_ops - Clock Operations for eswin SD controller
+ *
+ * @sdcardclk_ops:  The output clock related operations
+ * @sampleclk_ops:  The sample clock related operations
+ */
+struct eswin_sdhci_clk_ops {
+	const struct clk_ops *sdcardclk_ops;
+	const struct clk_ops *sampleclk_ops;
+};
+
+/**
+ * struct eswin_sdhci_clk_data - ESWIN Controller Clock Data.
+ *
+ * @sdcardclk_hw:   Struct for the clock we might provide to a PHY.
+ * @sdcardclk:      Pointer to normal 'struct clock' for sdcardclk_hw.
+ * @sampleclk_hw:   Struct for the clock we might provide to a PHY.
+ * @sampleclk:      Pointer to normal 'struct clock' for sampleclk_hw.
+ * @clk_phase_in:   Array of Input Clock Phase Delays for all speed modes
+ * @clk_phase_out:  Array of Output Clock Phase Delays for all speed modes
+ * @set_clk_delays: Function pointer for setting Clock Delays
+ * @clk_of_data:    Platform specific runtime clock data storage pointer
+ */
+struct eswin_sdhci_clk_data {
+	struct clk_hw sdcardclk_hw;
+	struct clk *sdcardclk;
+	struct clk_hw sampleclk_hw;
+	struct clk *sampleclk;
+	int clk_phase_in[MMC_TIMING_MMC_HS400 + 1];
+	int clk_phase_out[MMC_TIMING_MMC_HS400 + 1];
+	void (*set_clk_delays)(struct sdhci_host *host);
+	void *clk_of_data;
+};
+
+struct eswin_sdhci_phy_data {
+	unsigned int drive_impedance;
+	unsigned int enable_strobe_pulldown;
+	unsigned int enable_data_pullup;
+	unsigned int enable_cmd_pullup;
+	unsigned int delay_code;
+};
+
+/**
+ * struct eswin_sdhci_data - ESWIN Controller Data
+ *
+ * @host:       Pointer to the main SDHCI host structure.
+ * @clk_ahb:        Pointer to the AHB clock
+ * @has_cqe:        True if controller has command queuing engine.
+ * @clk_data:       Struct for the ESWIN Controller Clock Data.
+ * @clk_ops:        Struct for the ESWIN Controller Clock Operations.
+ * @soc_ctl_base:   Pointer to regmap for syscon for soc_ctl registers.
+ * @soc_ctl_map:    Map to get offsets into soc_ctl registers.
+ * @quirks:     ESWIN deviations from spec.
+ * @phy:        ESWIN sdhci phy configs.
+ * @private:    private for spec driver.
+ */
+struct eswin_sdhci_data {
+	struct sdhci_host *host;
+	struct clk *clk_ahb;
+	bool has_cqe;
+	struct eswin_sdhci_clk_data clk_data;
+	const struct eswin_sdhci_clk_ops *clk_ops;
+	unsigned int quirks;
+
+	struct regmap *crg_regmap;
+	unsigned int crg_core_clk;
+	unsigned int crg_aclk_ctrl;
+	unsigned int crg_cfg_ctrl;
+
+	struct regmap *hsp_regmap;
+	unsigned int hsp_int_status;
+	unsigned int hsp_pwr_ctrl;
+
+	struct reset_control *txrx_rst;
+	struct reset_control *phy_rst;
+	struct reset_control *prstn;
+	struct reset_control *arstn;
+	struct eswin_sdhci_phy_data phy;
+	unsigned long private[] ____cacheline_aligned;
+};
+
+struct eswin_sdhci_of_data {
+	const struct sdhci_pltfm_data *pdata;
+	const struct eswin_sdhci_clk_ops *clk_ops;
+};
+
+void eswin_sdhci_set_core_clock(struct sdhci_host *host, unsigned int clock);
+void eswin_sdhci_disable_card_clk(struct sdhci_host *host);
+void eswin_sdhci_enable_card_clk(struct sdhci_host *host);
+void eswin_sdhci_dt_parse_clk_phases(struct device *dev,
+				     struct eswin_sdhci_clk_data *clk_data);
+unsigned int eswin_convert_drive_impedance_ohm(struct platform_device *pdev,
+					       unsigned int dr_ohm);
+int eswin_sdhci_reset_init(struct device *dev,
+			   struct eswin_sdhci_data *eswin_sdhci);
+void eswin_sdhci_dump_vendor_regs(struct sdhci_host *host);
+
+#endif /* _DRIVERS_MMC_SDHCI_ESWIN_H */
diff --git a/drivers/mmc/host/sdhci-of-eic7700-sdio.c b/drivers/mmc/host/sdhci-of-eic7700-sdio.c
new file mode 100644
index 000000000000..68f9995ab3b6
--- /dev/null
+++ b/drivers/mmc/host/sdhci-of-eic7700-sdio.c
@@ -0,0 +1,991 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * ESWIN sdio Driver
+ *
+ * Copyright 2024, Beijing ESWIN Computing Technology Co., Ltd.. All rights reserved.
+ *
+ * Authors:
+ *	Shuang Liang <liangshuang@eswincomputing.com>
+ *	Xuyang Dong <dongxuyang@eswincomputing.com>
+ */
+
+#include "cqhci.h"
+#include "sdhci-eic7700.h"
+#include "sdhci-pltfm.h"
+#include <linux/bitfield.h>
+#include <linux/clk-provider.h>
+#include <linux/iommu.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/phy/phy.h>
+#include <linux/regmap.h>
+#include <linux/reset.h>
+
+#define ESWIN_SDHCI_SD_CQE_BASE_ADDR 0x180
+#define TUNING_RANGE_THRESHOLD 40
+
+static inline void *sdhci_sdio_priv(struct eswin_sdhci_data *sdio)
+{
+	return sdio->private;
+}
+
+static void eswin_sdhci_sdio_set_clock(struct sdhci_host *host,
+				       unsigned int clock)
+{
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct eswin_sdhci_data *eswin_sdhci_sdio =
+		sdhci_pltfm_priv(pltfm_host);
+	struct eswin_sdhci_clk_data *clk_data = &eswin_sdhci_sdio->clk_data;
+
+	/* Set the Input and Output Clock Phase Delays */
+	if (clk_data->set_clk_delays)
+		clk_data->set_clk_delays(host);
+
+	eswin_sdhci_set_core_clock(host, clock);
+
+	if (eswin_sdhci_sdio->quirks & SDHCI_ESWIN_QUIRK_CLOCK_UNSTABLE)
+		/*
+		 * Some controllers immediately report SDHCI_CLOCK_INT_STABLE
+		 * after enabling the clock even though the clock is not
+		 * stable. Trying to use a clock without waiting here results
+		 * in EILSEQ while detecting some older/slower cards. The
+		 * chosen delay is the maximum delay from sdhci_set_clock.
+		 */
+		msleep(20);
+}
+
+static void eswin_sdhci_sdio_config_phy_delay(struct sdhci_host *host,
+					      int delay)
+{
+	delay &= PHY_CLK_MAX_DELAY_MASK;
+
+	/*phy clk delay line config*/
+	sdhci_writeb(host, PHY_UPDATE_DELAY_CODE, PHY_SDCLKDL_CNFG_R);
+	sdhci_writeb(host, delay, PHY_SDCLKDL_DC_R);
+	sdhci_writeb(host, 0x0, PHY_SDCLKDL_CNFG_R);
+}
+
+static void eswin_sdhci_sdio_config_phy(struct sdhci_host *host)
+{
+	unsigned int val = 0;
+	unsigned int drv = 0;
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct eswin_sdhci_data *eswin_sdhci = sdhci_pltfm_priv(pltfm_host);
+	struct eswin_sdhci_phy_data *phy = &eswin_sdhci->phy;
+
+	drv = phy->drive_impedance << PHY_PAD_SP_DRIVE_SHIF;
+	pr_debug("%s: phy drv=0x%x\n", mmc_hostname(host->mmc), drv);
+
+	eswin_sdhci_disable_card_clk(host);
+
+	/* reset phy,config phy's pad */
+	sdhci_writel(host, drv | (~PHY_RSTN), PHY_CNFG_R);
+	/*CMDPAD_CNFS*/
+	val = (PHY_SLEW_2 << PHY_TX_SLEW_CTRL_P_BIT_SHIFT) |
+	      (PHY_SLEW_2 << PHY_TX_SLEW_CTRL_N_BIT_SHIFT) |
+	      (phy->enable_cmd_pullup << PHY_PULL_BIT_SHIF) | PHY_PAD_RXSEL_1;
+	sdhci_writew(host, val, PHY_CMDPAD_CNFG_R);
+	pr_debug("%s: phy cmd=0x%x\n", mmc_hostname(host->mmc), val);
+
+	/*DATA PAD CNFG*/
+	val = (PHY_SLEW_2 << PHY_TX_SLEW_CTRL_P_BIT_SHIFT) |
+	      (PHY_SLEW_2 << PHY_TX_SLEW_CTRL_N_BIT_SHIFT) |
+	      (phy->enable_data_pullup << PHY_PULL_BIT_SHIF) | PHY_PAD_RXSEL_1;
+	sdhci_writew(host, val, PHY_DATAPAD_CNFG_R);
+	pr_debug("%s: phy data=0x%x\n", mmc_hostname(host->mmc), val);
+
+	/*Clock PAD Setting*/
+	val = (PHY_SLEW_2 << PHY_TX_SLEW_CTRL_P_BIT_SHIFT) |
+	      (PHY_SLEW_2 << PHY_TX_SLEW_CTRL_N_BIT_SHIFT) | PHY_PAD_RXSEL_0;
+	sdhci_writew(host, val, PHY_CLKPAD_CNFG_R);
+	pr_debug("%s: phy clk=0x%x\n", mmc_hostname(host->mmc), val);
+	mdelay(2);
+
+	/*PHY RSTN PAD setting*/
+	val = (PHY_SLEW_2 << PHY_TX_SLEW_CTRL_P_BIT_SHIFT) |
+	      (PHY_SLEW_2 << PHY_TX_SLEW_CTRL_N_BIT_SHIFT) |
+	      (PHY_PULL_UP << PHY_PULL_BIT_SHIF) | PHY_PAD_RXSEL_1;
+	sdhci_writew(host, val, PHY_RSTNPAD_CNFG_R);
+
+	sdhci_writel(host, drv | PHY_RSTN, PHY_CNFG_R);
+
+	eswin_sdhci_sdio_config_phy_delay(host, phy->delay_code);
+
+	eswin_sdhci_enable_card_clk(host);
+}
+
+static void eswin_sdhci_sdio_reset(struct sdhci_host *host, u8 mask)
+{
+	u8 ctrl;
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct eswin_sdhci_data *eswin_sdhci_sdio =
+		sdhci_pltfm_priv(pltfm_host);
+
+	sdhci_writel(host, 0, SDHCI_INT_ENABLE);
+	sdhci_writel(host, 0, SDHCI_SIGNAL_ENABLE);
+
+	if (mask & SDHCI_RESET_ALL)
+		sdhci_reset(host, SDHCI_RESET_ALL);
+
+	if (mask & SDHCI_RESET_DATA)
+		sdhci_reset(host, SDHCI_RESET_DATA);
+
+	if (mask & SDHCI_RESET_CMD)
+		sdhci_reset(host, SDHCI_RESET_CMD);
+
+	sdhci_writel(host, host->ier, SDHCI_INT_ENABLE);
+	sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE);
+
+	if (eswin_sdhci_sdio->quirks & SDHCI_ESWIN_QUIRK_FORCE_CDTEST) {
+		ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
+		ctrl |= SDHCI_CTRL_CDTEST_INS | SDHCI_CTRL_CDTEST_EN;
+		sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
+	}
+	if (mask == SDHCI_RESET_ALL) { // after reset all,the phy`s config will
+				       // be clear.
+		eswin_sdhci_sdio_config_phy(host);
+	}
+}
+
+static int eswin_sdhci_sdio_phase_code_tuning(struct sdhci_host *host,
+					      u32 opcode)
+{
+	int cmd_error = 0;
+	int ret = 0;
+	int phase_code = -1;
+	int code_min = -1;
+	int code_max = -1;
+	int code_range = -1;
+	int i = 0;
+
+	for (i = 0; i <= MAX_PHASE_CODE; i++) {
+		eswin_sdhci_disable_card_clk(host);
+		sdhci_writew(host, i, VENDOR_AT_SATA_R);
+		eswin_sdhci_enable_card_clk(host);
+
+		ret = mmc_send_tuning(host->mmc, opcode, &cmd_error);
+		host->ops->reset(host, SDHCI_RESET_CMD | SDHCI_RESET_DATA);
+		if (ret) {
+			udelay(200);
+			pr_debug("%s: bad phase_code:0x%x!\n",
+				 mmc_hostname(host->mmc), i);
+			if (code_min != -1 && code_max != -1) {
+				if (code_max - code_min > code_range) {
+					code_range = code_max - code_min;
+					phase_code = (code_min + code_max) / 2;
+					if (code_range > TUNING_RANGE_THRESHOLD)
+						break;
+				}
+				code_min = -1;
+				code_max = -1;
+			}
+		} else {
+			pr_debug("%s: ok phase_code:0x%x\n",
+				 mmc_hostname(host->mmc), i);
+			if (code_min == -1)
+				code_min = i;
+
+			code_max = i;
+			if (i == MAX_PHASE_CODE) {
+				if (code_max - code_min > code_range) {
+					code_range = code_max - code_min;
+					phase_code = (code_min + code_max) / 2;
+				}
+			}
+			continue;
+		}
+	}
+
+	if (phase_code == -1) {
+		pr_err("%s: phase code tuning failed!\n",
+		       mmc_hostname(host->mmc));
+		eswin_sdhci_disable_card_clk(host);
+		sdhci_writew(host, 0, VENDOR_AT_SATA_R);
+		eswin_sdhci_enable_card_clk(host);
+		return -EIO;
+	}
+
+	pr_debug("%s: set phase_code:0x%x\n", mmc_hostname(host->mmc),
+		 phase_code);
+
+	eswin_sdhci_disable_card_clk(host);
+	sdhci_writew(host, phase_code, VENDOR_AT_SATA_R);
+	eswin_sdhci_enable_card_clk(host);
+
+	ret = mmc_send_tuning(host->mmc, opcode, &cmd_error);
+	host->ops->reset(host, SDHCI_RESET_CMD | SDHCI_RESET_DATA);
+	if (ret) {
+		pr_err("%s: phase_code code(0x%x) not work, tuning failed!\n",
+		       mmc_hostname(host->mmc), phase_code);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int eswin_sdhci_sdio_executing_tuning(struct sdhci_host *host,
+					     u32 opcode)
+{
+	u32 ctrl;
+	u32 val;
+	int ret = 0;
+	struct sdhci_pltfm_host *pltfm_host;
+
+	pltfm_host = sdhci_priv(host);
+	sdhci_pltfm_priv(pltfm_host);
+
+	eswin_sdhci_disable_card_clk(host);
+
+	ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
+	ctrl &= ~SDHCI_CTRL_TUNED_CLK;
+	sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2);
+
+	val = sdhci_readl(host, VENDOR_AT_CTRL_R);
+	val |= SW_TUNE_ENABLE;
+	sdhci_writew(host, val, VENDOR_AT_CTRL_R);
+	sdhci_writew(host, 0, VENDOR_AT_SATA_R);
+
+	eswin_sdhci_enable_card_clk(host);
+
+	sdhci_writew(host, 0x0, SDHCI_CMD_DATA);
+
+	ret = eswin_sdhci_sdio_phase_code_tuning(host, opcode);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static u32 eswin_sdhci_sdio_cqhci_irq(struct sdhci_host *host, u32 intmask)
+{
+	int cmd_error = 0;
+	int data_error = 0;
+
+	if (!sdhci_cqe_irq(host, intmask, &cmd_error, &data_error))
+		return intmask;
+
+	cqhci_irq(host->mmc, intmask, cmd_error, data_error);
+
+	return 0;
+}
+
+static void eswin_sdhci_sdio_dumpregs(struct mmc_host *mmc)
+{
+	sdhci_dumpregs(mmc_priv(mmc));
+}
+
+static void eswin_sdhci_sdio_cqe_enable(struct mmc_host *mmc)
+{
+	struct sdhci_host *host = mmc_priv(mmc);
+	u32 reg;
+
+	reg = sdhci_readl(host, SDHCI_PRESENT_STATE);
+	while (reg & SDHCI_DATA_AVAILABLE) {
+		sdhci_readl(host, SDHCI_BUFFER);
+		reg = sdhci_readl(host, SDHCI_PRESENT_STATE);
+	}
+
+	sdhci_cqe_enable(mmc);
+}
+
+static const struct cqhci_host_ops eswin_sdhci_sdio_cqhci_ops = {
+	.enable = eswin_sdhci_sdio_cqe_enable,
+	.disable = sdhci_cqe_disable,
+	.dumpregs = eswin_sdhci_sdio_dumpregs,
+};
+
+static const struct sdhci_ops eswin_sdhci_sdio_cqe_ops = {
+	.set_clock = eswin_sdhci_sdio_set_clock,
+	.get_max_clock = sdhci_pltfm_clk_get_max_clock,
+	.get_timeout_clock = sdhci_pltfm_clk_get_max_clock,
+	.set_bus_width = sdhci_set_bus_width,
+	.reset = eswin_sdhci_sdio_reset,
+	.set_uhs_signaling = sdhci_set_uhs_signaling,
+	.set_power = sdhci_set_power_and_bus_voltage,
+	.irq = eswin_sdhci_sdio_cqhci_irq,
+	.platform_execute_tuning = eswin_sdhci_sdio_executing_tuning,
+	.dump_vendor_regs = eswin_sdhci_dump_vendor_regs,
+};
+
+static const struct sdhci_pltfm_data eswin_sdhci_sdio_cqe_pdata = {
+	.ops = &eswin_sdhci_sdio_cqe_ops,
+	.quirks = SDHCI_QUIRK_BROKEN_CQE | SDHCI_QUIRK_SINGLE_POWER_WRITE |
+		  SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN |
+		  SDHCI_QUIRK_BROKEN_TIMEOUT_VAL,
+	.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
+		   SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN,
+};
+
+#ifdef CONFIG_PM_SLEEP
+/**
+ * eswin_sdhci_sdio_suspend- Suspend method for the driver
+ * @dev:        Address of the device structure
+ *
+ * Put the device in a low power state.
+ *
+ * Return: 0 on success and error value on error
+ */
+static int eswin_sdhci_sdio_suspend(struct device *dev)
+{
+	struct sdhci_host *host = dev_get_drvdata(dev);
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct eswin_sdhci_data *eswin_sdhci_sdio =
+		sdhci_pltfm_priv(pltfm_host);
+	int ret;
+
+	pm_runtime_get_sync(dev);
+
+	if (host->tuning_mode != SDHCI_TUNING_MODE_3)
+		mmc_retune_needed(host->mmc);
+
+	ret = sdhci_suspend_host(host);
+	if (ret)
+		return ret;
+
+	clk_disable_unprepare(pltfm_host->clk);
+	clk_disable_unprepare(eswin_sdhci_sdio->clk_ahb);
+
+	return 0;
+}
+
+/**
+ * eswin_sdhci_sdio_resume- Resume method for the driver
+ * @dev:        Address of the device structure
+ *
+ * Resume operation after suspend
+ *
+ * Return: 0 on success and error value on error
+ */
+static int eswin_sdhci_sdio_resume(struct device *dev)
+{
+	struct sdhci_host *host = dev_get_drvdata(dev);
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct eswin_sdhci_data *eswin_sdhci_sdio =
+		sdhci_pltfm_priv(pltfm_host);
+	int ret;
+
+	pm_runtime_put_sync(dev);
+	ret = clk_prepare_enable(eswin_sdhci_sdio->clk_ahb);
+	if (ret) {
+		dev_err(dev, "can't enable clk_ahb.\n");
+		return ret;
+	}
+	ret = clk_prepare_enable(pltfm_host->clk);
+	if (ret) {
+		dev_err(dev, "can't enable mainck.\n");
+		goto clk_ahb_disable;
+	}
+
+	ret = sdhci_resume_host(host);
+	if (ret) {
+		dev_err(dev, "runtime resume failed!\n");
+		goto clk_disable;
+	}
+
+	return 0;
+clk_disable:
+	clk_disable_unprepare(pltfm_host->clk);
+clk_ahb_disable:
+	clk_disable_unprepare(eswin_sdhci_sdio->clk_ahb);
+
+	return ret;
+}
+
+static int eswin_sdhci_sdio_runtime_suspend(struct device *dev)
+{
+	struct sdhci_host *host = dev_get_drvdata(dev);
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct eswin_sdhci_data *eswin_sdhci_sdio =
+		sdhci_pltfm_priv(pltfm_host);
+	int ret;
+
+	ret = sdhci_runtime_suspend_host(host);
+	if (ret)
+		return ret;
+
+	if (host->tuning_mode != SDHCI_TUNING_MODE_3)
+		mmc_retune_needed(host->mmc);
+
+	clk_disable_unprepare(pltfm_host->clk);
+	clk_disable_unprepare(eswin_sdhci_sdio->clk_ahb);
+
+	return 0;
+}
+
+static int eswin_sdhci_sdio_runtime_resume(struct device *dev)
+{
+	struct sdhci_host *host = dev_get_drvdata(dev);
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct eswin_sdhci_data *eswin_sdhci_sdio =
+		sdhci_pltfm_priv(pltfm_host);
+	int ret;
+
+	ret = clk_prepare_enable(eswin_sdhci_sdio->clk_ahb);
+	if (ret) {
+		dev_err(dev, "can't enable clk_ahb\n");
+		return ret;
+	}
+
+	ret = clk_prepare_enable(pltfm_host->clk);
+	if (ret) {
+		dev_err(dev, "can't enable mainck\n");
+		goto clk_ahb_disable;
+	}
+
+	ret = sdhci_runtime_resume_host(host, 1);
+	if (ret) {
+		dev_err(dev, "runtime resume failed!\n");
+		goto clk_disable;
+	}
+
+	return 0;
+clk_disable:
+	clk_disable_unprepare(pltfm_host->clk);
+clk_ahb_disable:
+	clk_disable_unprepare(eswin_sdhci_sdio->clk_ahb);
+
+	return ret;
+}
+
+#endif /* ! CONFIG_PM_SLEEP */
+
+/**
+ * eswin_sdhci_sdio_sdcardclk_recalc_rate- Return the card clock rate
+ *
+ * @hw:                 Pointer to the hardware clock structure.
+ * @parent_rate:                The parent rate (should be rate of clk_xin).
+ *
+ * Return the current actual rate of the SD card clock.  This can be used
+ * to communicate with out PHY.
+ *
+ * Return: The card clock rate.
+ */
+static unsigned long
+eswin_sdhci_sdio_sdcardclk_recalc_rate(struct clk_hw *hw,
+				       unsigned long parent_rate)
+{
+	struct eswin_sdhci_clk_data *clk_data =
+		container_of(hw, struct eswin_sdhci_clk_data, sdcardclk_hw);
+	struct eswin_sdhci_data *eswin_sdhci_sdio =
+		container_of(clk_data, struct eswin_sdhci_data, clk_data);
+	struct sdhci_host *host = eswin_sdhci_sdio->host;
+
+	return host->mmc->actual_clock;
+}
+
+static const struct clk_ops eswin_sdio_sdcardclk_ops = {
+	.recalc_rate = eswin_sdhci_sdio_sdcardclk_recalc_rate,
+};
+
+/**
+ * eswin_sdhci_sdio_sampleclk_recalc_rate- Return the sampling clock rate
+ *
+ * @hw:                 Pointer to the hardware clock structure.
+ * @parent_rate:                The parent rate (should be rate of clk_xin).
+ *
+ * Return the current actual rate of the sampling clock.  This can be used
+ * to communicate with out PHY.
+ *
+ * Return: The sample clock rate.
+ */
+static unsigned long
+eswin_sdhci_sdio_sampleclk_recalc_rate(struct clk_hw *hw,
+				       unsigned long parent_rate)
+{
+	struct eswin_sdhci_clk_data *clk_data =
+		container_of(hw, struct eswin_sdhci_clk_data, sampleclk_hw);
+	struct eswin_sdhci_data *eswin_sdhci_sdio =
+		container_of(clk_data, struct eswin_sdhci_data, clk_data);
+	struct sdhci_host *host = eswin_sdhci_sdio->host;
+
+	return host->mmc->actual_clock;
+}
+
+static const struct clk_ops eswin_sdio_sampleclk_ops = {
+	.recalc_rate = eswin_sdhci_sdio_sampleclk_recalc_rate,
+};
+
+static const struct eswin_sdhci_clk_ops eswin_sdio_clk_ops = {
+	.sdcardclk_ops = &eswin_sdio_sdcardclk_ops,
+	.sampleclk_ops = &eswin_sdio_sampleclk_ops,
+};
+
+static struct eswin_sdhci_of_data eswin_sdhci_fu800_sdio_data = {
+	.pdata = &eswin_sdhci_sdio_cqe_pdata,
+	.clk_ops = &eswin_sdio_clk_ops,
+};
+
+static const struct of_device_id eswin_sdhci_sdio_of_match[] = {
+	/* SoC-specific compatible strings*/
+	{
+		.compatible = "eswin,sdhci-sdio",
+		.data = &eswin_sdhci_fu800_sdio_data,
+	},
+	{/* sentinel */}};
+MODULE_DEVICE_TABLE(of, eswin_sdhci_sdio_of_match);
+
+/**
+ * eswin_sdhci_sdio_register_sdcardclk- Register the sdcardclk for a PHY to use
+ *
+ * @eswin_sdhci_sdio:       Our private data structure.
+ * @clk_xin:            Pointer to the functional clock
+ * @dev:                Pointer to our struct device.
+ *
+ * Some PHY devices need to know what the actual card clock is.  In order for
+ * them to find out, we'll provide a clock through the common clock framework
+ * for them to query.
+ *
+ * Return: 0 on success and error value on error
+ */
+static int
+eswin_sdhci_sdio_register_sdcardclk(struct eswin_sdhci_data *eswin_sdhci_sdio,
+				    struct clk *clk_xin, struct device *dev)
+{
+	struct eswin_sdhci_clk_data *clk_data = &eswin_sdhci_sdio->clk_data;
+	struct device_node *np = dev->of_node;
+	struct clk_init_data sdcardclk_init;
+	const char *parent_clk_name;
+	int ret;
+
+	ret = of_property_read_string_index(np, "clock-output-names", 0,
+					    &sdcardclk_init.name);
+	if (ret) {
+		dev_err(dev, "DT has #clock-cells but no clock-output-names\n");
+		return ret;
+	}
+
+	parent_clk_name = __clk_get_name(clk_xin);
+	sdcardclk_init.parent_names = &parent_clk_name;
+	sdcardclk_init.num_parents = 1;
+	sdcardclk_init.flags = CLK_GET_RATE_NOCACHE;
+	sdcardclk_init.ops = eswin_sdhci_sdio->clk_ops->sdcardclk_ops;
+
+	clk_data->sdcardclk_hw.init = &sdcardclk_init;
+	clk_data->sdcardclk = devm_clk_register(dev, &clk_data->sdcardclk_hw);
+	if (IS_ERR(clk_data->sdcardclk))
+		return PTR_ERR(clk_data->sdcardclk);
+
+	clk_data->sdcardclk_hw.init = NULL;
+
+	ret = of_clk_add_provider(np, of_clk_src_simple_get,
+				  clk_data->sdcardclk);
+	if (ret)
+		dev_err(dev, "Failed to add sdcard clock provider\n");
+
+	return ret;
+}
+
+/**
+ * eswin_sdhci_sdio_register_sampleclk - Register the sampleclk for a PHY to use
+ *
+ * @eswin_sdhci_sdio:       Our private data structure.
+ * @clk_xin:            Pointer to the functional clock
+ * @dev:                Pointer to our struct device.
+ *
+ * Some PHY devices need to know what the actual card clock is.  In order for
+ * them to find out, we'll provide a clock through the common clock framework
+ * for them to query.
+ *
+ * Return: 0 on success and error value on error
+ */
+static int
+eswin_sdhci_sdio_register_sampleclk(struct eswin_sdhci_data *eswin_sdhci_sdio,
+				    struct clk *clk_xin, struct device *dev)
+{
+	struct eswin_sdhci_clk_data *clk_data = &eswin_sdhci_sdio->clk_data;
+	struct device_node *np = dev->of_node;
+	struct clk_init_data sampleclk_init;
+	const char *parent_clk_name;
+	int ret;
+
+	ret = of_property_read_string_index(np, "clock-output-names", 1,
+					    &sampleclk_init.name);
+	if (ret) {
+		dev_err(dev, "DT has #clock-cells but no clock-output-names\n");
+		return ret;
+	}
+
+	parent_clk_name = __clk_get_name(clk_xin);
+	sampleclk_init.parent_names = &parent_clk_name;
+	sampleclk_init.num_parents = 1;
+	sampleclk_init.flags = CLK_GET_RATE_NOCACHE;
+	sampleclk_init.ops = eswin_sdhci_sdio->clk_ops->sampleclk_ops;
+
+	clk_data->sampleclk_hw.init = &sampleclk_init;
+	clk_data->sampleclk = devm_clk_register(dev, &clk_data->sampleclk_hw);
+	if (IS_ERR(clk_data->sampleclk))
+		return PTR_ERR(clk_data->sampleclk);
+	clk_data->sampleclk_hw.init = NULL;
+
+	ret = of_clk_add_provider(np, of_clk_src_simple_get,
+				  clk_data->sampleclk);
+	if (ret)
+		dev_err(dev, "Failed to add sample clock provider\n");
+
+	return ret;
+}
+
+/**
+ * eswin_sdhci_sdio_unregister_sdclk- Undoes sdhci_arasan_register_sdclk()
+ *
+ * @dev:                Pointer to our struct device.
+ *
+ * Should be called any time we're exiting and sdhci_arasan_register_sdclk()
+ * returned success.
+ */
+static void eswin_sdhci_sdio_unregister_sdclk(struct device *dev)
+{
+	struct device_node *np = dev->of_node;
+
+	if (!of_find_property(np, "#clock-cells", NULL))
+		return;
+
+	of_clk_del_provider(dev->of_node);
+}
+
+/**
+ * eswin_sdhci_sdio_register_sdclk- Register the sdcardclk for a PHY to use
+ *
+ * @eswin_sdhci_sdio:   Our private data structure.
+ * @clk_xin:            Pointer to the functional clock
+ * @dev:                Pointer to our struct device.
+ *
+ * Some PHY devices need to know what the actual card clock is.  In order for
+ * them to find out, we'll provide a clock through the common clock framework
+ * for them to query.
+ *
+ * Note: without seriously re-architecting SDHCI's clock code and testing on
+ * all platforms, there's no way to create a totally beautiful clock here
+ * with all clock ops implemented.      Instead, we'll just create a clock that
+ * can be queried and set the CLK_GET_RATE_NOCACHE attribute to tell common
+ * clock framework that we're doing things behind its back.  This should be
+ * sufficient to create nice clean device tree bindings and later (if needed) we
+ * can try re-architecting SDHCI if we see some benefit to it.
+ *
+ * Return: 0 on success and error value on error
+ */
+static int
+eswin_sdhci_sdio_register_sdclk(struct eswin_sdhci_data *eswin_sdhci_sdio,
+				struct clk *clk_xin, struct device *dev)
+{
+	struct device_node *np = dev->of_node;
+	u32 num_clks = 0;
+	int ret;
+
+	/* Providing a clock to the PHY is optional; no error if missing */
+	if (of_property_read_u32(np, "#clock-cells", &num_clks) < 0)
+		return 0;
+
+	ret = eswin_sdhci_sdio_register_sdcardclk(eswin_sdhci_sdio, clk_xin,
+						  dev);
+	if (ret)
+		return ret;
+
+	if (num_clks) {
+		ret = eswin_sdhci_sdio_register_sampleclk(eswin_sdhci_sdio,
+							  clk_xin, dev);
+		if (ret) {
+			eswin_sdhci_sdio_unregister_sdclk(dev);
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+static int eswin_sdhci_sdio_add_host(struct eswin_sdhci_data *eswin_sdhci_sdio)
+{
+	struct sdhci_host *host = eswin_sdhci_sdio->host;
+	struct cqhci_host *cq_host;
+	bool dma64;
+	int ret;
+
+	if (!eswin_sdhci_sdio->has_cqe)
+		return sdhci_add_host(host);
+
+	ret = sdhci_setup_host(host);
+	if (ret)
+		return ret;
+
+	cq_host = devm_kzalloc(host->mmc->parent, sizeof(*cq_host), GFP_KERNEL);
+	if (!cq_host) {
+		ret = -ENOMEM;
+		goto cleanup;
+	}
+
+	cq_host->mmio = host->ioaddr + ESWIN_SDHCI_SD_CQE_BASE_ADDR;
+	cq_host->ops = &eswin_sdhci_sdio_cqhci_ops;
+
+	dma64 = host->flags & SDHCI_USE_64_BIT_DMA;
+	if (dma64)
+		cq_host->caps |= CQHCI_TASK_DESC_SZ_128;
+
+	ret = cqhci_init(cq_host, host->mmc, dma64);
+	if (ret)
+		goto cleanup;
+
+	ret = __sdhci_add_host(host);
+	if (ret)
+		goto cleanup;
+
+	return 0;
+
+cleanup:
+	sdhci_cleanup_host(host);
+	return ret;
+}
+
+static int eswin_sdhci_sdio_probe(struct platform_device *pdev)
+{
+	int ret;
+	struct clk *clk_xin;
+	struct clk *clk_spll2_fout3;
+	struct clk *clk_mux;
+	struct sdhci_host *host;
+	struct sdhci_pltfm_host *pltfm_host;
+	struct device *dev = &pdev->dev;
+	struct device_node *np = dev->of_node;
+	struct eswin_sdhci_data *eswin_sdhci_sdio;
+	const struct eswin_sdhci_of_data *data;
+	unsigned int val = 0;
+
+	data = of_device_get_match_data(dev);
+	host = sdhci_pltfm_init(pdev, data->pdata, sizeof(*eswin_sdhci_sdio));
+
+	if (IS_ERR(host))
+		return PTR_ERR(host);
+
+	pltfm_host = sdhci_priv(host);
+	eswin_sdhci_sdio = sdhci_pltfm_priv(pltfm_host);
+	eswin_sdhci_sdio->host = host;
+	eswin_sdhci_sdio->has_cqe = false;
+
+	sdhci_get_of_property(pdev);
+
+	eswin_sdhci_sdio->clk_ops = data->clk_ops;
+	eswin_sdhci_sdio->clk_ahb = devm_clk_get(dev, "clk_ahb");
+	if (IS_ERR(eswin_sdhci_sdio->clk_ahb)) {
+		ret = dev_err_probe(dev, PTR_ERR(eswin_sdhci_sdio->clk_ahb),
+				    "clk_ahb clock not found.\n");
+		goto err_pltfm_free;
+	}
+
+	clk_xin = devm_clk_get(dev, "clk_xin");
+	if (IS_ERR(clk_xin)) {
+		ret = dev_err_probe(dev, PTR_ERR(clk_xin),
+				    "clk_xin clock not found.\n");
+		goto err_pltfm_free;
+	}
+
+	clk_spll2_fout3 = devm_clk_get(dev, "clk_spll2_fout3");
+
+	if (IS_ERR(clk_spll2_fout3)) {
+		ret = dev_err_probe(dev, PTR_ERR(clk_spll2_fout3),
+				    "clk_spll2_fout3 clock not found.\n");
+		goto err_pltfm_free;
+	}
+
+	if (of_device_is_compatible(np, "eswin,sdhci-sdio")) {
+		clk_mux = devm_clk_get(dev, "clk_mux1_1");
+		if (IS_ERR(clk_mux)) {
+			ret = dev_err_probe(dev, PTR_ERR(clk_mux),
+					    "clk_mux1_1 clock not found.\n");
+			goto err_pltfm_free;
+		}
+		/*switch the core clk source*/
+		clk_set_parent(clk_mux, clk_spll2_fout3);
+	}
+
+	ret = clk_prepare_enable(eswin_sdhci_sdio->clk_ahb);
+	if (ret) {
+		dev_err(dev, "Unable to enable AHB clock.\n");
+		goto err_pltfm_free;
+	}
+	/* If clock-frequency property is set, use the provided value */
+	if (pltfm_host->clock && pltfm_host->clock != clk_get_rate(clk_xin)) {
+		ret = clk_set_rate(clk_xin, pltfm_host->clock);
+		if (ret) {
+			dev_err(&pdev->dev, "Failed to set SD clock rate\n");
+			goto clk_dis_ahb;
+		}
+	}
+
+	ret = clk_prepare_enable(clk_xin);
+	if (ret) {
+		dev_err(dev, "Unable to enable SD clock.\n");
+		goto clk_dis_ahb;
+	}
+
+	pltfm_host->clk = clk_xin;
+	ret = eswin_sdhci_sdio_register_sdclk(eswin_sdhci_sdio, clk_xin, dev);
+	if (ret)
+		goto clk_disable_all;
+
+	ret = eswin_sdhci_reset_init(dev, eswin_sdhci_sdio);
+	if (ret < 0) {
+		dev_err(dev, "failed to reset\n");
+		goto clk_disable_all;
+	}
+
+	eswin_sdhci_sdio->crg_regmap = syscon_regmap_lookup_by_phandle(
+		pdev->dev.of_node, "eswin,syscrg_csr");
+	if (IS_ERR(eswin_sdhci_sdio->crg_regmap)) {
+		dev_dbg(&pdev->dev, "No syscrg_csr phandle specified\n");
+		goto clk_disable_all;
+	}
+
+	ret = of_property_read_u32_index(pdev->dev.of_node, "eswin,syscrg_csr",
+					 1, &eswin_sdhci_sdio->crg_core_clk);
+	if (ret) {
+		dev_err(&pdev->dev, "can't get crg_core_clk (%d)\n", ret);
+		goto clk_disable_all;
+	}
+	ret = of_property_read_u32_index(pdev->dev.of_node, "eswin,syscrg_csr",
+					 2, &eswin_sdhci_sdio->crg_aclk_ctrl);
+	if (ret) {
+		dev_err(&pdev->dev, "can't get crg_aclk_ctrl (%d)\n", ret);
+		goto clk_disable_all;
+	}
+	ret = of_property_read_u32_index(pdev->dev.of_node, "eswin,syscrg_csr",
+					 3, &eswin_sdhci_sdio->crg_cfg_ctrl);
+	if (ret) {
+		dev_err(&pdev->dev, "can't get crg_cfg_ctrl (%d)\n", ret);
+		goto clk_disable_all;
+	}
+
+	eswin_sdhci_sdio->hsp_regmap = syscon_regmap_lookup_by_phandle(
+		dev->of_node, "eswin,hsp_sp_csr");
+	if (IS_ERR(eswin_sdhci_sdio->hsp_regmap)) {
+		dev_dbg(dev, "No hsp_sp_csr phandle specified\n");
+		goto clk_disable_all;
+	}
+
+	ret = of_property_read_u32_index(pdev->dev.of_node, "eswin,hsp_sp_csr",
+					 2, &eswin_sdhci_sdio->hsp_int_status);
+	if (ret) {
+		dev_err(&pdev->dev, "can't get hsp_int_status (%d)\n", ret);
+		goto clk_disable_all;
+	}
+	ret = of_property_read_u32_index(pdev->dev.of_node, "eswin,hsp_sp_csr",
+					 3, &eswin_sdhci_sdio->hsp_pwr_ctrl);
+	if (ret) {
+		dev_err(&pdev->dev, "can't get hsp_pwr_ctrl (%d)\n", ret);
+		goto clk_disable_all;
+	}
+
+	regmap_write(eswin_sdhci_sdio->hsp_regmap,
+		     eswin_sdhci_sdio->hsp_int_status, MSHC_INT_CLK_STABLE);
+	regmap_write(eswin_sdhci_sdio->hsp_regmap,
+		     eswin_sdhci_sdio->hsp_pwr_ctrl, MSHC_HOST_VAL_STABLE);
+
+	if (!of_property_read_u32(dev->of_node, "delay_code", &val))
+		eswin_sdhci_sdio->phy.delay_code = val;
+
+	if (!of_property_read_u32(dev->of_node, "drive-impedance-ohm", &val))
+		eswin_sdhci_sdio->phy.drive_impedance =
+			eswin_convert_drive_impedance_ohm(pdev, val);
+
+	if (of_property_read_bool(dev->of_node, "enable-cmd-pullup"))
+		eswin_sdhci_sdio->phy.enable_cmd_pullup = ENABLE;
+	else
+		eswin_sdhci_sdio->phy.enable_cmd_pullup = DISABLE;
+
+	if (of_property_read_bool(dev->of_node, "enable-data-pullup"))
+		eswin_sdhci_sdio->phy.enable_data_pullup = ENABLE;
+	else
+		eswin_sdhci_sdio->phy.enable_data_pullup = DISABLE;
+
+	eswin_sdhci_dt_parse_clk_phases(dev, &eswin_sdhci_sdio->clk_data);
+	ret = mmc_of_parse(host->mmc);
+	if (ret) {
+		ret = dev_err_probe(dev, ret, "parsing dt failed.\n");
+		goto unreg_clk;
+	}
+
+	ret = eswin_sdhci_sdio_add_host(eswin_sdhci_sdio);
+	if (ret)
+		goto unreg_clk;
+
+	pm_runtime_set_active(&pdev->dev);
+	pm_runtime_set_autosuspend_delay(&pdev->dev, 50);
+	pm_runtime_use_autosuspend(&pdev->dev);
+	pm_suspend_ignore_children(&pdev->dev, 1);
+	pm_runtime_enable(&pdev->dev);
+
+	return 0;
+
+unreg_clk:
+	eswin_sdhci_sdio_unregister_sdclk(dev);
+clk_disable_all:
+	clk_disable_unprepare(clk_xin);
+clk_dis_ahb:
+	clk_disable_unprepare(eswin_sdhci_sdio->clk_ahb);
+err_pltfm_free:
+	sdhci_pltfm_free(pdev);
+	return ret;
+}
+
+static void eswin_sdhci_sdio_remove(struct platform_device *pdev)
+{
+	int ret;
+	struct sdhci_host *host = platform_get_drvdata(pdev);
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct eswin_sdhci_data *eswin_sdhci_sdio =
+		sdhci_pltfm_priv(pltfm_host);
+	struct clk *clk_ahb = eswin_sdhci_sdio->clk_ahb;
+
+	pm_runtime_get_sync(&pdev->dev);
+	pm_runtime_disable(&pdev->dev);
+	pm_runtime_put_noidle(&pdev->dev);
+
+	sdhci_pltfm_remove(pdev);
+
+	if (eswin_sdhci_sdio->txrx_rst) {
+		ret = reset_control_assert(eswin_sdhci_sdio->txrx_rst);
+		WARN_ON(ret != 0);
+	}
+
+	if (eswin_sdhci_sdio->phy_rst) {
+		ret = reset_control_assert(eswin_sdhci_sdio->phy_rst);
+		WARN_ON(ret != 0);
+	}
+
+	if (eswin_sdhci_sdio->prstn) {
+		ret = reset_control_assert(eswin_sdhci_sdio->prstn);
+		WARN_ON(ret != 0);
+	}
+
+	if (eswin_sdhci_sdio->arstn) {
+		ret = reset_control_assert(eswin_sdhci_sdio->arstn);
+		WARN_ON(ret != 0);
+	}
+
+	eswin_sdhci_sdio_unregister_sdclk(&pdev->dev);
+	clk_disable_unprepare(clk_ahb);
+}
+
+static const struct dev_pm_ops eswin_sdhci_sdio_pmops = {
+	SET_SYSTEM_SLEEP_PM_OPS(eswin_sdhci_sdio_suspend,
+				eswin_sdhci_sdio_resume)
+		SET_RUNTIME_PM_OPS(eswin_sdhci_sdio_runtime_suspend,
+				   eswin_sdhci_sdio_runtime_resume, NULL)};
+
+static struct platform_driver eswin_sdhci_sdio_driver = {
+	.driver = {
+		.name = "eswin-sdhci-sdio",
+		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
+		.of_match_table = eswin_sdhci_sdio_of_match,
+		.pm = &eswin_sdhci_sdio_pmops,
+	},
+	.probe = eswin_sdhci_sdio_probe,
+	.remove = eswin_sdhci_sdio_remove,
+};
+
+module_platform_driver(eswin_sdhci_sdio_driver);
+
+MODULE_DESCRIPTION("Driver for the Eswin SDHCI Controller");
+MODULE_AUTHOR("Shuang Liang <liangshuang@eswincomputing.com>");
+MODULE_AUTHOR("Xuyang Dong <dongxuyang@eswincomputing.com>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/mmc/host/sdhci-of-eic7700.c b/drivers/mmc/host/sdhci-of-eic7700.c
new file mode 100644
index 000000000000..078f15b99d67
--- /dev/null
+++ b/drivers/mmc/host/sdhci-of-eic7700.c
@@ -0,0 +1,1053 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * ESWIN Emmc Driver
+ *
+ * Copyright 2024, Beijing ESWIN Computing Technology Co., Ltd.. All rights reserved.
+ *
+ * Authors:
+ *	Shuang Liang <liangshuang@eswincomputing.com>
+ *	Xuyang Dong <dongxuyang@eswincomputing.com>
+ */
+
+#include "cqhci.h"
+#include "sdhci-eic7700.h"
+#include "sdhci-pltfm.h"
+#include <linux/bitfield.h>
+#include <linux/clk-provider.h>
+#include <linux/iommu.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/phy/phy.h>
+#include <linux/regmap.h>
+#include <linux/reset.h>
+
+// EMMC_DWC_MSHC_CRYPTO_CFG_PTR 8 -- parameter
+#define eswin_sdhci_VENDOR_REGISTER_BASEADDR 0x800
+#define eswin_sdhci_VENDOR_EMMC_CTRL_REGISTER 0x2c
+#define VENDOR_ENHANCED_STROBE BIT(8)
+
+#define eswin_sdhci_CQE_BASE_ADDR eswin_sdhci_VENDOR_REGISTER_BASEADDR
+
+/* Controller does not have CD wired and will not function normally without */
+#define eswin_sdhci_QUIRK_FORCE_CDTEST BIT(0)
+/* Controller immediately reports SDHCI_CLOCK_INT_STABLE after enabling the
+ * internal clock even when the clock isn't stable
+ */
+#define eswin_sdhci_QUIRK_CLOCK_UNSTABLE BIT(1)
+
+/*
+ * On some SoCs the syscon area has a feature where the upper 16-bits of
+ * each 32-bit register act as a write mask for the lower 16-bits.  This allows
+ * atomic updates of the register without locking.  This macro is used on SoCs
+ * that have that feature.
+ */
+#define HIWORD_UPDATE(val, mask, shift)                                        \
+	((val) << (shift) | (mask) << ((shift) + 16))
+
+static void eswin_sdhci_set_clock(struct sdhci_host *host, unsigned int clock)
+{
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct eswin_sdhci_data *eswin_sdhci = sdhci_pltfm_priv(pltfm_host);
+	struct eswin_sdhci_clk_data *clk_data = &eswin_sdhci->clk_data;
+
+	/* Set the Input and Output Clock Phase Delays */
+	if (clk_data->set_clk_delays)
+		clk_data->set_clk_delays(host);
+
+	eswin_sdhci_set_core_clock(host, clock);
+
+	/*
+	 * Some controllers immediately report SDHCI_CLOCK_INT_STABLE
+	 * after enabling the clock even though the clock is not
+	 * stable. Trying to use a clock without waiting here results
+	 * in EILSEQ while detecting some older/slower cards. The
+	 * chosen delay is the maximum delay from sdhci_set_clock.
+	 */
+	if (eswin_sdhci->quirks & SDHCI_ESWIN_QUIRK_CLOCK_UNSTABLE)
+		msleep(20);
+}
+
+static void eswin_sdhci_hs400_enhanced_strobe(struct mmc_host *mmc,
+					      struct mmc_ios *ios)
+{
+	u32 vendor;
+	struct sdhci_host *host = mmc_priv(mmc);
+
+	vendor = sdhci_readl(host, eswin_sdhci_VENDOR_EMMC_CTRL_REGISTER);
+	if (ios->enhanced_strobe)
+		vendor |= VENDOR_ENHANCED_STROBE;
+	else
+		vendor &= ~VENDOR_ENHANCED_STROBE;
+
+	sdhci_writel(host, vendor, eswin_sdhci_VENDOR_EMMC_CTRL_REGISTER);
+}
+
+static void eswin_sdhci_config_phy_delay(struct sdhci_host *host, int delay)
+{
+	delay &= PHY_CLK_MAX_DELAY_MASK;
+
+	/*phy clk delay line config*/
+	sdhci_writeb(host, PHY_UPDATE_DELAY_CODE, PHY_SDCLKDL_CNFG_R);
+	sdhci_writeb(host, delay, PHY_SDCLKDL_DC_R);
+	sdhci_writeb(host, 0x0, PHY_SDCLKDL_CNFG_R);
+}
+
+static void eswin_sdhci_config_phy(struct sdhci_host *host)
+{
+	unsigned int val = 0;
+	unsigned int drv = 0;
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct eswin_sdhci_data *eswin_sdhci = sdhci_pltfm_priv(pltfm_host);
+	struct eswin_sdhci_phy_data *phy = &eswin_sdhci->phy;
+
+	drv = phy->drive_impedance << PHY_PAD_SP_DRIVE_SHIF;
+
+	pr_debug("%s: phy drv=0x%x\n", mmc_hostname(host->mmc), drv);
+
+	val = sdhci_readw(host, VENDOR_EMMC_CTRL_R);
+	val |= EMMC_CRAD_PRESENT; // emmc card
+	sdhci_writew(host, val, VENDOR_EMMC_CTRL_R);
+
+	eswin_sdhci_disable_card_clk(host);
+
+	/* reset phy,config phy's pad */
+	sdhci_writel(host, drv | (~PHY_RSTN), PHY_CNFG_R);
+	/*CMDPAD_CNFS*/
+	val = (PHY_SLEW_2 << PHY_TX_SLEW_CTRL_P_BIT_SHIFT) |
+	      (PHY_SLEW_2 << PHY_TX_SLEW_CTRL_N_BIT_SHIFT) |
+	      (phy->enable_cmd_pullup << PHY_PULL_BIT_SHIF) | PHY_PAD_RXSEL_1;
+	sdhci_writew(host, val, PHY_CMDPAD_CNFG_R);
+	pr_debug("%s: phy cmd=0x%x\n", mmc_hostname(host->mmc), val);
+
+	/*DATA PAD CNFG*/
+	val = (PHY_SLEW_2 << PHY_TX_SLEW_CTRL_P_BIT_SHIFT) |
+	      (PHY_SLEW_2 << PHY_TX_SLEW_CTRL_N_BIT_SHIFT) |
+	      (phy->enable_data_pullup << PHY_PULL_BIT_SHIF) | PHY_PAD_RXSEL_1;
+	sdhci_writew(host, val, PHY_DATAPAD_CNFG_R);
+	pr_debug("%s: phy data=0x%x\n", mmc_hostname(host->mmc), val);
+
+	/*Clock PAD Setting*/
+	val = (PHY_SLEW_2 << PHY_TX_SLEW_CTRL_P_BIT_SHIFT) |
+	      (PHY_SLEW_2 << PHY_TX_SLEW_CTRL_N_BIT_SHIFT) | PHY_PAD_RXSEL_0;
+	sdhci_writew(host, val, PHY_CLKPAD_CNFG_R);
+	pr_debug("%s: phy clk=0x%x\n", mmc_hostname(host->mmc), val);
+
+	/*PHY strobe PAD setting*/
+	val = (PHY_SLEW_2 << PHY_TX_SLEW_CTRL_P_BIT_SHIFT) |
+	      (PHY_SLEW_2 << PHY_TX_SLEW_CTRL_N_BIT_SHIFT) |
+	      ((phy->enable_strobe_pulldown * PHY_PULL_DOWN)
+	       << PHY_PULL_BIT_SHIF) |
+	      PHY_PAD_RXSEL_1;
+	sdhci_writew(host, val, PHY_STBPAD_CNFG_R);
+	pr_debug("%s: phy strobe=0x%x\n", mmc_hostname(host->mmc), val);
+	mdelay(2);
+
+	/*PHY RSTN PAD setting*/
+	val = (PHY_SLEW_2 << PHY_TX_SLEW_CTRL_P_BIT_SHIFT) |
+	      (PHY_SLEW_2 << PHY_TX_SLEW_CTRL_N_BIT_SHIFT) |
+	      (PHY_PULL_UP << PHY_PULL_BIT_SHIF) | PHY_PAD_RXSEL_1;
+	sdhci_writew(host, val, PHY_RSTNPAD_CNFG_R);
+	pr_debug("%s: phy rstn=0x%x\n", mmc_hostname(host->mmc), val);
+
+	sdhci_writel(host, drv | PHY_RSTN, PHY_CNFG_R);
+
+	eswin_sdhci_config_phy_delay(host, phy->delay_code);
+
+	eswin_sdhci_enable_card_clk(host);
+}
+
+static void eswin_sdhci_reset(struct sdhci_host *host, u8 mask)
+{
+	u8 ctrl;
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct eswin_sdhci_data *eswin_sdhci = sdhci_pltfm_priv(pltfm_host);
+
+	sdhci_writel(host, 0, SDHCI_INT_ENABLE);
+	sdhci_writel(host, 0, SDHCI_SIGNAL_ENABLE);
+	sdhci_reset(host, mask);
+	sdhci_writel(host, host->ier, SDHCI_INT_ENABLE);
+	sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE);
+
+	if (eswin_sdhci->quirks & SDHCI_ESWIN_QUIRK_FORCE_CDTEST) {
+		ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
+		ctrl |= SDHCI_CTRL_CDTEST_INS | SDHCI_CTRL_CDTEST_EN;
+		sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
+	}
+
+	if (mask == SDHCI_RESET_ALL) { // after reset all,the phy`s config will
+				       // be clear.
+		eswin_sdhci_config_phy(host);
+	}
+}
+
+static u32 eswin_sdhci_cqhci_irq(struct sdhci_host *host, u32 intmask)
+{
+	int cmd_error = 0;
+	int data_error = 0;
+
+	if (!sdhci_cqe_irq(host, intmask, &cmd_error, &data_error))
+		return intmask;
+
+	cqhci_irq(host->mmc, intmask, cmd_error, data_error);
+
+	return 0;
+}
+
+static void eswin_sdhci_dumpregs(struct mmc_host *mmc)
+{
+	sdhci_dumpregs(mmc_priv(mmc));
+}
+
+static void eswin_sdhci_cqe_enable(struct mmc_host *mmc)
+{
+	struct sdhci_host *host = mmc_priv(mmc);
+	u32 reg;
+
+	reg = sdhci_readl(host, SDHCI_PRESENT_STATE);
+	while (reg & SDHCI_DATA_AVAILABLE) {
+		sdhci_readl(host, SDHCI_BUFFER);
+		reg = sdhci_readl(host, SDHCI_PRESENT_STATE);
+	}
+
+	sdhci_cqe_enable(mmc);
+}
+
+static int eswin_sdhci_delay_tuning(struct sdhci_host *host, u32 opcode)
+{
+	int ret;
+	int delay = 0;
+	int i = 0;
+	int delay_min = -1;
+	int delay_max = -1;
+	int cmd_error = 0;
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct eswin_sdhci_data *eswin_sdhci = sdhci_pltfm_priv(pltfm_host);
+
+	for (i = 0; i <= PHY_DELAY_CODE_MAX; i++) {
+		eswin_sdhci_disable_card_clk(host);
+		eswin_sdhci_config_phy_delay(host, i);
+		eswin_sdhci_enable_card_clk(host);
+		ret = mmc_send_tuning(host->mmc, opcode, &cmd_error);
+		if (ret) {
+			host->ops->reset(host,
+					 SDHCI_RESET_CMD | SDHCI_RESET_DATA);
+			udelay(200);
+			if (delay_min != -1 && delay_max != -1)
+				break;
+		} else {
+			if (delay_min == -1) {
+				delay_min = i;
+				continue;
+			} else {
+				delay_max = i;
+				continue;
+			}
+		}
+	}
+	if (delay_min == -1 && delay_max == -1) {
+		pr_err("%s: delay code tuning failed!\n",
+		       mmc_hostname(host->mmc));
+		eswin_sdhci_disable_card_clk(host);
+		eswin_sdhci_config_phy_delay(host, eswin_sdhci->phy.delay_code);
+		eswin_sdhci_enable_card_clk(host);
+
+		return ret;
+	}
+
+	delay = (delay_min + delay_max) / 2;
+	pr_debug("%s: set delay:0x%x\n", mmc_hostname(host->mmc), delay);
+	eswin_sdhci_disable_card_clk(host);
+	eswin_sdhci_config_phy_delay(host, delay);
+	eswin_sdhci_enable_card_clk(host);
+
+	return 0;
+}
+
+static int eswin_sdhci_phase_code_tuning(struct sdhci_host *host, u32 opcode)
+{
+	int cmd_error = 0;
+	int ret = 0;
+	int phase_code = 0;
+	int code_min = -1;
+	int code_max = -1;
+
+	for (phase_code = 0; phase_code <= MAX_PHASE_CODE; phase_code++) {
+		eswin_sdhci_disable_card_clk(host);
+		sdhci_writew(host, phase_code, VENDOR_AT_SATA_R);
+		eswin_sdhci_enable_card_clk(host);
+
+		ret = mmc_send_tuning(host->mmc, opcode, &cmd_error);
+		if (ret) {
+			host->ops->reset(host,
+					 SDHCI_RESET_CMD | SDHCI_RESET_DATA);
+			udelay(200);
+			if (code_min != -1 && code_max != -1)
+				break;
+		} else {
+			if (code_min == -1) {
+				code_min = phase_code;
+				continue;
+			} else {
+				code_max = phase_code;
+				continue;
+			}
+		}
+	}
+	if (code_min == -1 && code_max == -1) {
+		pr_err("%s: phase code tuning failed!\n",
+		       mmc_hostname(host->mmc));
+		eswin_sdhci_disable_card_clk(host);
+		sdhci_writew(host, 0, VENDOR_AT_SATA_R);
+		eswin_sdhci_enable_card_clk(host);
+		return -EIO;
+	}
+
+	phase_code = (code_min + code_max) / 2;
+	pr_debug("%s: set phase_code:0x%x\n", mmc_hostname(host->mmc),
+		 phase_code);
+
+	eswin_sdhci_disable_card_clk(host);
+	sdhci_writew(host, phase_code, VENDOR_AT_SATA_R);
+	eswin_sdhci_enable_card_clk(host);
+
+	return 0;
+}
+
+static int eswin_sdhci_executing_tuning(struct sdhci_host *host, u32 opcode)
+{
+	u32 ctrl;
+	u32 val;
+	int ret = 0;
+
+	eswin_sdhci_disable_card_clk(host);
+
+	ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
+	ctrl &= ~SDHCI_CTRL_TUNED_CLK;
+	sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2);
+
+	val = sdhci_readl(host, VENDOR_AT_CTRL_R);
+	val |= SW_TUNE_ENABLE;
+	sdhci_writew(host, val, VENDOR_AT_CTRL_R);
+	sdhci_writew(host, 0, VENDOR_AT_SATA_R);
+
+	eswin_sdhci_enable_card_clk(host);
+
+	sdhci_writew(host, 0x0, SDHCI_CMD_DATA);
+
+	ret = eswin_sdhci_delay_tuning(host, opcode);
+	if (ret < 0)
+		return ret;
+
+	ret = eswin_sdhci_phase_code_tuning(host, opcode);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static void eswin_sdhci_set_uhs_signaling(struct sdhci_host *host,
+					  unsigned int timing)
+{
+	u32 val;
+	u32 status;
+	u32 timeout = 0;
+	u16 ctrl_2;
+
+	ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2);
+	/* Select Bus Speed Mode for host */
+	ctrl_2 &= ~SDHCI_CTRL_UHS_MASK;
+	if ((timing == MMC_TIMING_MMC_HS200) ||
+	    (timing == MMC_TIMING_UHS_SDR104))
+		ctrl_2 |= SDHCI_CTRL_UHS_SDR104;
+	else if (timing == MMC_TIMING_UHS_SDR12)
+		ctrl_2 |= SDHCI_CTRL_UHS_SDR12;
+	else if (timing == MMC_TIMING_UHS_SDR25)
+		ctrl_2 |= SDHCI_CTRL_UHS_SDR25;
+	else if (timing == MMC_TIMING_UHS_SDR50)
+		ctrl_2 |= SDHCI_CTRL_UHS_SDR50;
+	else if ((timing == MMC_TIMING_UHS_DDR50) ||
+		 (timing == MMC_TIMING_MMC_DDR52))
+		ctrl_2 |= SDHCI_CTRL_UHS_DDR50;
+	else if (timing == MMC_TIMING_MMC_HS400)
+		ctrl_2 |= ESWIN_SDHCI_CTRL_HS400; /* Non-standard */
+	sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2);
+
+	/*
+	 * here need make dll locked when in hs400 at 200MHz
+	 */
+	if ((timing == MMC_TIMING_MMC_HS400) && (host->clock == 200000000)) {
+		eswin_sdhci_disable_card_clk(host);
+
+		val = sdhci_readl(host, VENDOR_AT_CTRL_R);
+		val &= ~(LATENCY_LT_MASK << LATENCY_LT_BIT_OFFSET);
+		val |= (LATENCY_LT_3 << LATENCY_LT_MASK);
+		sdhci_writel(host, val, VENDOR_AT_CTRL_R);
+
+		sdhci_writeb(host, 0x23, PHY_DLL_CNFG1_R);
+		sdhci_writeb(host, 0x02, PHY_DLL_CNFG2_R);
+		sdhci_writeb(host, 0x60, PHY_DLLDL_CNFG_R);
+		sdhci_writeb(host, 0x00, PHY_DLL_OFFST_R);
+		sdhci_writew(host, 0xffff, PHY_DLLBT_CNFG_R);
+
+		eswin_sdhci_enable_card_clk(host);
+		sdhci_writeb(host, DLL_ENABEL, PHY_DLL_CTRL_R);
+		udelay(100);
+
+		while (1) {
+			status = sdhci_readb(host, PHY_DLL_STATUS_R);
+			if (status & DLL_LOCK_STS) {
+				pr_debug("%s: locked status:0x%x\n",
+					 mmc_hostname(host->mmc), status);
+				break;
+			}
+			timeout++;
+			udelay(100);
+			if (timeout > 10000) {
+				pr_err("%s: DLL lock failed!status:0x%x\n",
+				       mmc_hostname(host->mmc), status);
+				return;
+			}
+		}
+
+		status = sdhci_readb(host, PHY_DLL_STATUS_R);
+		if (status & DLL_ERROR_STS) {
+			pr_err("%s: DLL lock failed!err_status:0x%x\n",
+			       mmc_hostname(host->mmc), status);
+		} else {
+			pr_debug("%s: DLL lock is success\n",
+				 mmc_hostname(host->mmc));
+		}
+	}
+}
+
+static const struct cqhci_host_ops eswin_sdhci_cqhci_ops = {
+	.enable = eswin_sdhci_cqe_enable,
+	.disable = sdhci_cqe_disable,
+	.dumpregs = eswin_sdhci_dumpregs,
+};
+
+static const struct sdhci_ops eswin_sdhci_cqe_ops = {
+	.set_clock = eswin_sdhci_set_clock,
+	.get_max_clock = sdhci_pltfm_clk_get_max_clock,
+	.get_timeout_clock = sdhci_pltfm_clk_get_max_clock,
+	.set_bus_width = sdhci_set_bus_width,
+	.reset = eswin_sdhci_reset,
+	.set_uhs_signaling = eswin_sdhci_set_uhs_signaling,
+	.set_power = sdhci_set_power_and_bus_voltage,
+	.irq = eswin_sdhci_cqhci_irq,
+	.platform_execute_tuning = eswin_sdhci_executing_tuning,
+	.dump_vendor_regs = eswin_sdhci_dump_vendor_regs,
+};
+
+static const struct sdhci_pltfm_data eswin_sdhci_cqe_pdata = {
+	.ops = &eswin_sdhci_cqe_ops,
+	.quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN |
+		  SDHCI_QUIRK_BROKEN_TIMEOUT_VAL,
+	.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
+		   SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN,
+};
+
+#ifdef CONFIG_PM_SLEEP
+/**
+ * eswin_sdhci_suspend - Suspend method for the driver
+ * @dev:    Address of the device structure
+ *
+ * Put the device in a low power state.
+ *
+ * Return: 0 on success and error value on error
+ */
+static int eswin_sdhci_suspend(struct device *dev)
+{
+	struct sdhci_host *host = dev_get_drvdata(dev);
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct eswin_sdhci_data *eswin_sdhci = sdhci_pltfm_priv(pltfm_host);
+	int ret;
+
+	if (host->tuning_mode != SDHCI_TUNING_MODE_3)
+		mmc_retune_needed(host->mmc);
+
+	ret = sdhci_suspend_host(host);
+	if (ret)
+		return ret;
+
+	clk_disable_unprepare(pltfm_host->clk);
+	clk_disable_unprepare(eswin_sdhci->clk_ahb);
+
+	return 0;
+}
+
+/**
+ * eswin_sdhci_resume - Resume method for the driver
+ * @dev:    Address of the device structure
+ *
+ * Resume operation after suspend
+ *
+ * Return: 0 on success and error value on error
+ */
+static int eswin_sdhci_resume(struct device *dev)
+{
+	struct sdhci_host *host = dev_get_drvdata(dev);
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct eswin_sdhci_data *eswin_sdhci = sdhci_pltfm_priv(pltfm_host);
+	int ret;
+
+	ret = clk_prepare_enable(eswin_sdhci->clk_ahb);
+	if (ret) {
+		dev_err(dev, "can't enable clk_ahb\n");
+		return ret;
+	}
+	ret = clk_prepare_enable(pltfm_host->clk);
+	if (ret) {
+		dev_err(dev, "can't enable mainck\n");
+		goto clk_ahb_disable;
+	}
+
+	ret = sdhci_resume_host(host);
+	if (ret) {
+		dev_err(dev, "runtime resume failed!\n");
+		goto clk_disable;
+	}
+
+	return 0;
+clk_disable:
+	clk_disable_unprepare(pltfm_host->clk);
+clk_ahb_disable:
+	clk_disable_unprepare(eswin_sdhci->clk_ahb);
+
+	return ret;
+}
+
+#endif /* ! CONFIG_PM_SLEEP */
+
+/**
+ * eswin_sdhci_sdcardclk_recalc_rate - Return the card clock rate
+ *
+ * @hw:         Pointer to the hardware clock structure.
+ * @parent_rate:        The parent rate (should be rate of clk_xin).
+ *
+ * Return the current actual rate of the SD card clock.  This can be used
+ * to communicate with out PHY.
+ *
+ * Return: The card clock rate.
+ */
+static unsigned long
+eswin_sdhci_sdcardclk_recalc_rate(struct clk_hw *hw, unsigned long parent_rate)
+{
+	struct eswin_sdhci_clk_data *clk_data =
+		container_of(hw, struct eswin_sdhci_clk_data, sdcardclk_hw);
+	struct eswin_sdhci_data *eswin_sdhci =
+		container_of(clk_data, struct eswin_sdhci_data, clk_data);
+	struct sdhci_host *host = eswin_sdhci->host;
+
+	return host->mmc->actual_clock;
+}
+
+static const struct clk_ops eswin_sdcardclk_ops = {
+	.recalc_rate = eswin_sdhci_sdcardclk_recalc_rate,
+};
+
+/**
+ * eswin_sdhci_sampleclk_recalc_rate - Return the sampling clock rate
+ *
+ * @hw:         Pointer to the hardware clock structure.
+ * @parent_rate:        The parent rate (should be rate of clk_xin).
+ *
+ * Return the current actual rate of the sampling clock.  This can be used
+ * to communicate with out PHY.
+ *
+ * Return: The sample clock rate.
+ */
+static unsigned long
+eswin_sdhci_sampleclk_recalc_rate(struct clk_hw *hw, unsigned long parent_rate)
+{
+	struct eswin_sdhci_clk_data *clk_data =
+		container_of(hw, struct eswin_sdhci_clk_data, sampleclk_hw);
+	struct eswin_sdhci_data *eswin_sdhci =
+		container_of(clk_data, struct eswin_sdhci_data, clk_data);
+	struct sdhci_host *host = eswin_sdhci->host;
+
+	return host->mmc->actual_clock;
+}
+
+static const struct clk_ops eswin_sampleclk_ops = {
+	.recalc_rate = eswin_sdhci_sampleclk_recalc_rate,
+};
+
+static const struct eswin_sdhci_clk_ops eswin_clk_ops = {
+	.sdcardclk_ops = &eswin_sdcardclk_ops,
+	.sampleclk_ops = &eswin_sampleclk_ops,
+};
+
+static struct eswin_sdhci_of_data eswin_sdhci_fu800_data = {
+	.pdata = &eswin_sdhci_cqe_pdata,
+	.clk_ops = &eswin_clk_ops,
+};
+
+static const struct of_device_id eswin_sdhci_of_match[] = {
+	{
+		.compatible = "eswin,eic7700-emmc-sdhci",
+		.data = &eswin_sdhci_fu800_data,
+	},
+	{/* sentinel */}};
+MODULE_DEVICE_TABLE(of, eswin_sdhci_of_match);
+
+/**
+ * eswin_sdhci_register_sdcardclk - Register the sdcardclk for a PHY to use
+ *
+ * @eswin_sdhci:    Our private data structure.
+ * @clk_xin:        Pointer to the functional clock
+ * @dev:        Pointer to our struct device.
+ *
+ * Some PHY devices need to know what the actual card clock is.  In order for
+ * them to find out, we'll provide a clock through the common clock framework
+ * for them to query.
+ *
+ * Return: 0 on success and error value on error
+ */
+static int eswin_sdhci_register_sdcardclk(struct eswin_sdhci_data *eswin_sdhci,
+					  struct clk *clk_xin,
+					  struct device *dev)
+{
+	struct eswin_sdhci_clk_data *clk_data = &eswin_sdhci->clk_data;
+	struct device_node *np = dev->of_node;
+	struct clk_init_data sdcardclk_init;
+	const char *parent_clk_name;
+	int ret;
+
+	ret = of_property_read_string_index(np, "clock-output-names", 0,
+					    &sdcardclk_init.name);
+	if (ret) {
+		dev_err(dev, "DT has #clock-cells but no clock-output-names\n");
+		return ret;
+	}
+
+	parent_clk_name = __clk_get_name(clk_xin);
+	sdcardclk_init.parent_names = &parent_clk_name;
+	sdcardclk_init.num_parents = 1;
+	sdcardclk_init.flags = CLK_GET_RATE_NOCACHE;
+	sdcardclk_init.ops = eswin_sdhci->clk_ops->sdcardclk_ops;
+
+	clk_data->sdcardclk_hw.init = &sdcardclk_init;
+	clk_data->sdcardclk = devm_clk_register(dev, &clk_data->sdcardclk_hw);
+	if (IS_ERR(clk_data->sdcardclk))
+		return PTR_ERR(clk_data->sdcardclk);
+	clk_data->sdcardclk_hw.init = NULL;
+
+	ret = of_clk_add_provider(np, of_clk_src_simple_get,
+				  clk_data->sdcardclk);
+	if (ret)
+		dev_err(dev, "Failed to add sdcard clock provider\n");
+
+	return ret;
+}
+
+/**
+ * eswin_sdhci_register_sampleclk - Register the sampleclk for a PHY to use
+ *
+ * @eswin_sdhci:    Our private data structure.
+ * @clk_xin:        Pointer to the functional clock
+ * @dev:        Pointer to our struct device.
+ *
+ * Some PHY devices need to know what the actual card clock is.  In order for
+ * them to find out, we'll provide a clock through the common clock framework
+ * for them to query.
+ *
+ * Return: 0 on success and error value on error
+ */
+static int eswin_sdhci_register_sampleclk(struct eswin_sdhci_data *eswin_sdhci,
+					  struct clk *clk_xin,
+					  struct device *dev)
+{
+	struct eswin_sdhci_clk_data *clk_data = &eswin_sdhci->clk_data;
+	struct device_node *np = dev->of_node;
+	struct clk_init_data sampleclk_init;
+	const char *parent_clk_name;
+	int ret;
+
+	ret = of_property_read_string_index(np, "clock-output-names", 1,
+					    &sampleclk_init.name);
+	if (ret) {
+		dev_err(dev, "DT has #clock-cells but no clock-output-names\n");
+		return ret;
+	}
+
+	parent_clk_name = __clk_get_name(clk_xin);
+	sampleclk_init.parent_names = &parent_clk_name;
+	sampleclk_init.num_parents = 1;
+	sampleclk_init.flags = CLK_GET_RATE_NOCACHE;
+	sampleclk_init.ops = eswin_sdhci->clk_ops->sampleclk_ops;
+
+	clk_data->sampleclk_hw.init = &sampleclk_init;
+	clk_data->sampleclk = devm_clk_register(dev, &clk_data->sampleclk_hw);
+	if (IS_ERR(clk_data->sampleclk))
+		return PTR_ERR(clk_data->sampleclk);
+	clk_data->sampleclk_hw.init = NULL;
+
+	ret = of_clk_add_provider(np, of_clk_src_simple_get,
+				  clk_data->sampleclk);
+	if (ret)
+		dev_err(dev, "Failed to add sample clock provider\n");
+
+	return ret;
+}
+
+/**
+ * eswin_sdhci_unregister_sdclk - Undoes eswin_sdhci_register_sdclk()
+ *
+ * @dev:        Pointer to our struct device.
+ *
+ * Should be called any time we're exiting and eswin_sdhci_register_sdclk()
+ * returned success.
+ */
+static void eswin_sdhci_unregister_sdclk(struct device *dev)
+{
+	struct device_node *np = dev->of_node;
+
+	if (!of_find_property(np, "#clock-cells", NULL))
+		return;
+
+	of_clk_del_provider(dev->of_node);
+}
+
+/**
+ * eswin_sdhci_register_sdclk - Register the sdcardclk for a PHY to use
+ *
+ * @eswin_sdhci:    Our private data structure.
+ * @clk_xin:        Pointer to the functional clock
+ * @dev:        Pointer to our struct device.
+ *
+ * Some PHY devices need to know what the actual card clock is.  In order for
+ * them to find out, we'll provide a clock through the common clock framework
+ * for them to query.
+ *
+ * Note: without seriously re-architecting SDHCI's clock code and testing on
+ * all platforms, there's no way to create a totally beautiful clock here
+ * with all clock ops implemented.  Instead, we'll just create a clock that can
+ * be queried and set the CLK_GET_RATE_NOCACHE attribute to tell common clock
+ * framework that we're doing things behind its back.  This should be sufficient
+ * to create nice clean device tree bindings and later (if needed) we can try
+ * re-architecting SDHCI if we see some benefit to it.
+ *
+ * Return: 0 on success and error value on error
+ */
+static int eswin_sdhci_register_sdclk(struct eswin_sdhci_data *eswin_sdhci,
+				      struct clk *clk_xin, struct device *dev)
+{
+	struct device_node *np = dev->of_node;
+	u32 num_clks = 0;
+	int ret;
+
+	/* Providing a clock to the PHY is optional; no error if missing */
+	if (of_property_read_u32(np, "#clock-cells", &num_clks) < 0)
+		return 0;
+
+	ret = eswin_sdhci_register_sdcardclk(eswin_sdhci, clk_xin, dev);
+	if (ret)
+		return ret;
+
+	if (num_clks) {
+		ret = eswin_sdhci_register_sampleclk(eswin_sdhci, clk_xin, dev);
+		if (ret) {
+			eswin_sdhci_unregister_sdclk(dev);
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+static int eswin_sdhci_add_host(struct eswin_sdhci_data *eswin_sdhci)
+{
+	struct sdhci_host *host = eswin_sdhci->host;
+	struct cqhci_host *cq_host;
+	bool dma64;
+	int ret;
+
+	if (!eswin_sdhci->has_cqe)
+		return sdhci_add_host(host);
+
+	ret = sdhci_setup_host(host);
+	if (ret)
+		return ret;
+
+	cq_host = devm_kzalloc(host->mmc->parent, sizeof(*cq_host), GFP_KERNEL);
+	if (!cq_host) {
+		ret = -ENOMEM;
+		goto cleanup;
+	}
+
+	cq_host->mmio = host->ioaddr + eswin_sdhci_CQE_BASE_ADDR;
+	cq_host->ops = &eswin_sdhci_cqhci_ops;
+
+	dma64 = host->flags & SDHCI_USE_64_BIT_DMA;
+	if (dma64)
+		cq_host->caps |= CQHCI_TASK_DESC_SZ_128;
+
+	ret = cqhci_init(cq_host, host->mmc, dma64);
+	if (ret)
+		goto cleanup;
+
+	ret = __sdhci_add_host(host);
+	if (ret)
+		goto cleanup;
+
+	return 0;
+
+cleanup:
+	sdhci_cleanup_host(host);
+	return ret;
+}
+
+static int eswin_sdhci_probe(struct platform_device *pdev)
+{
+	int ret;
+	struct clk *clk_xin;
+	struct sdhci_host *host;
+	struct sdhci_pltfm_host *pltfm_host;
+	struct device *dev = &pdev->dev;
+	struct eswin_sdhci_data *eswin_sdhci;
+	const struct eswin_sdhci_of_data *data;
+	unsigned int val = 0;
+
+	data = of_device_get_match_data(dev);
+	host = sdhci_pltfm_init(pdev, data->pdata, sizeof(*eswin_sdhci));
+	if (IS_ERR(host))
+		return PTR_ERR(host);
+
+	pltfm_host = sdhci_priv(host);
+	eswin_sdhci = sdhci_pltfm_priv(pltfm_host);
+	eswin_sdhci->host = host;
+	eswin_sdhci->clk_ops = data->clk_ops;
+
+	eswin_sdhci->clk_ahb = devm_clk_get(dev, "clk_ahb");
+	if (IS_ERR(eswin_sdhci->clk_ahb)) {
+		ret = dev_err_probe(dev, PTR_ERR(eswin_sdhci->clk_ahb),
+				    "clk_ahb clock not found.\n");
+		goto err_pltfm_free;
+	}
+
+	clk_xin = devm_clk_get(dev, "clk_xin");
+	if (IS_ERR(clk_xin)) {
+		ret = dev_err_probe(dev, PTR_ERR(clk_xin),
+				    "clk_xin clock not found.\n");
+		goto err_pltfm_free;
+	}
+
+	ret = clk_prepare_enable(eswin_sdhci->clk_ahb);
+	if (ret) {
+		dev_err(dev, "Unable to enable AHB clock.\n");
+		goto err_pltfm_free;
+	}
+
+	ret = clk_prepare_enable(clk_xin);
+	if (ret) {
+		dev_err(dev, "Unable to enable SD clock.\n");
+		goto clk_dis_ahb;
+	}
+
+	ret = eswin_sdhci_reset_init(dev, eswin_sdhci);
+	if (ret < 0) {
+		dev_err(dev, "failed to reset\n");
+		goto clk_disable_all;
+	}
+
+	eswin_sdhci->crg_regmap = syscon_regmap_lookup_by_phandle(
+		pdev->dev.of_node, "eswin,syscrg_csr");
+	if (IS_ERR(eswin_sdhci->crg_regmap)) {
+		dev_dbg(&pdev->dev, "No syscrg_csr phandle specified\n");
+		goto clk_disable_all;
+	}
+
+	ret = of_property_read_u32_index(pdev->dev.of_node, "eswin,syscrg_csr",
+					 1, &eswin_sdhci->crg_core_clk);
+	if (ret) {
+		dev_err(&pdev->dev, "can't get crg_core_clk (%d)\n", ret);
+		goto clk_disable_all;
+	}
+	ret = of_property_read_u32_index(pdev->dev.of_node, "eswin,syscrg_csr",
+					 2, &eswin_sdhci->crg_aclk_ctrl);
+	if (ret) {
+		dev_err(&pdev->dev, "can't get crg_aclk_ctrl (%d)\n", ret);
+		goto clk_disable_all;
+	}
+	ret = of_property_read_u32_index(pdev->dev.of_node, "eswin,syscrg_csr",
+					 3, &eswin_sdhci->crg_cfg_ctrl);
+	if (ret) {
+		dev_err(&pdev->dev, "can't get crg_cfg_ctrl (%d)\n", ret);
+		goto clk_disable_all;
+	}
+
+	eswin_sdhci->hsp_regmap = syscon_regmap_lookup_by_phandle(
+		dev->of_node, "eswin,hsp_sp_csr");
+	if (IS_ERR(eswin_sdhci->hsp_regmap)) {
+		dev_dbg(dev, "No hsp_sp_csr phandle specified\n");
+		goto clk_disable_all;
+	}
+
+	ret = of_property_read_u32_index(pdev->dev.of_node, "eswin,hsp_sp_csr",
+					 2, &eswin_sdhci->hsp_int_status);
+	if (ret) {
+		dev_err(&pdev->dev, "can't get hsp_int_status (%d)\n", ret);
+		goto clk_disable_all;
+	}
+	ret = of_property_read_u32_index(pdev->dev.of_node, "eswin,hsp_sp_csr",
+					 3, &eswin_sdhci->hsp_pwr_ctrl);
+	if (ret) {
+		dev_err(&pdev->dev, "can't get hsp_pwr_ctrl (%d)\n", ret);
+		goto clk_disable_all;
+	}
+
+	regmap_write(eswin_sdhci->hsp_regmap, eswin_sdhci->hsp_int_status,
+		     MSHC_INT_CLK_STABLE);
+	regmap_write(eswin_sdhci->hsp_regmap, eswin_sdhci->hsp_pwr_ctrl,
+		     MSHC_HOST_VAL_STABLE);
+
+	if (!of_property_read_u32(dev->of_node, "delay_code", &val))
+		eswin_sdhci->phy.delay_code = val;
+
+	if (!of_property_read_u32(dev->of_node, "drive-impedance-ohm", &val))
+		eswin_sdhci->phy.drive_impedance =
+			eswin_convert_drive_impedance_ohm(pdev, val);
+
+	if (of_property_read_bool(dev->of_node, "enable-cmd-pullup"))
+		eswin_sdhci->phy.enable_cmd_pullup = ENABLE;
+	else
+		eswin_sdhci->phy.enable_cmd_pullup = DISABLE;
+
+	if (of_property_read_bool(dev->of_node, "enable-data-pullup"))
+		eswin_sdhci->phy.enable_data_pullup = ENABLE;
+	else
+		eswin_sdhci->phy.enable_data_pullup = DISABLE;
+
+	if (of_property_read_bool(dev->of_node, "enable-strobe-pulldown"))
+		eswin_sdhci->phy.enable_strobe_pulldown = ENABLE;
+	else
+		eswin_sdhci->phy.enable_strobe_pulldown = DISABLE;
+
+	sdhci_get_of_property(pdev);
+
+	pltfm_host->clk = clk_xin;
+
+	ret = eswin_sdhci_register_sdclk(eswin_sdhci, clk_xin, dev);
+	if (ret)
+		goto clk_disable_all;
+
+	eswin_sdhci_dt_parse_clk_phases(dev, &eswin_sdhci->clk_data);
+
+	ret = mmc_of_parse(host->mmc);
+	if (ret) {
+		ret = dev_err_probe(dev, ret, "parsing dt failed.\n");
+		goto unreg_clk;
+	}
+
+	if (of_device_is_compatible(dev->of_node, "eswin,sdhci-5.1")) {
+		host->mmc_host_ops.hs400_enhanced_strobe =
+			eswin_sdhci_hs400_enhanced_strobe;
+		eswin_sdhci->has_cqe = true;
+		host->mmc->caps2 |= MMC_CAP2_CQE;
+
+		if (!of_property_read_bool(dev->of_node, "disable-cqe-dcmd"))
+			host->mmc->caps2 |= MMC_CAP2_CQE_DCMD;
+	}
+
+	sdhci_enable_v4_mode(eswin_sdhci->host);
+
+	ret = eswin_sdhci_add_host(eswin_sdhci);
+	if (ret)
+		goto unreg_clk;
+
+	return 0;
+
+unreg_clk:
+	eswin_sdhci_unregister_sdclk(dev);
+clk_disable_all:
+	clk_disable_unprepare(clk_xin);
+clk_dis_ahb:
+	clk_disable_unprepare(eswin_sdhci->clk_ahb);
+err_pltfm_free:
+	sdhci_pltfm_free(pdev);
+	return ret;
+}
+
+static void eswin_sdhci_remove(struct platform_device *pdev)
+{
+	int ret;
+	struct sdhci_host *host = platform_get_drvdata(pdev);
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct eswin_sdhci_data *eswin_sdhci = sdhci_pltfm_priv(pltfm_host);
+	struct clk *clk_ahb = eswin_sdhci->clk_ahb;
+
+	sdhci_pltfm_remove(pdev);
+
+	if (eswin_sdhci->txrx_rst) {
+		ret = reset_control_assert(eswin_sdhci->txrx_rst);
+		WARN_ON(ret != 0);
+	}
+
+	if (eswin_sdhci->phy_rst) {
+		ret = reset_control_assert(eswin_sdhci->phy_rst);
+		WARN_ON(ret != 0);
+	}
+
+	if (eswin_sdhci->prstn) {
+		ret = reset_control_assert(eswin_sdhci->prstn);
+		WARN_ON(ret != 0);
+	}
+
+	if (eswin_sdhci->arstn) {
+		ret = reset_control_assert(eswin_sdhci->arstn);
+		WARN_ON(ret != 0);
+	}
+	eswin_sdhci_unregister_sdclk(&pdev->dev);
+	clk_disable_unprepare(clk_ahb);
+}
+
+static void emmc_hard_reset(struct sdhci_host *host)
+{
+	unsigned int val;
+
+	val = sdhci_readw(host, VENDOR_EMMC_CTRL_R);
+	val |= EMMC_RST_N_OE;
+	sdhci_writew(host, val, VENDOR_EMMC_CTRL_R);
+	val &= ~EMMC_RST_N;
+	sdhci_writew(host, val, VENDOR_EMMC_CTRL_R);
+	mdelay(20);
+	val |= EMMC_RST_N;
+	sdhci_writew(host, val, VENDOR_EMMC_CTRL_R);
+}
+
+static void eswin_sdhci_shutdown(struct platform_device *pdev)
+{
+	struct sdhci_host *host = platform_get_drvdata(pdev);
+
+	if (!host)
+		return;
+
+	emmc_hard_reset(host);
+	host->ops->reset(host, SDHCI_RESET_ALL);
+	platform_set_drvdata(pdev, NULL);
+}
+
+static const struct dev_pm_ops eswin_sdhci_pmops = {
+	SET_SYSTEM_SLEEP_PM_OPS(eswin_sdhci_suspend, eswin_sdhci_resume)};
+
+static struct platform_driver eswin_sdhci_driver = {
+	.driver = {
+		.name = "sdhci-eic7700",
+		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
+		.of_match_table = eswin_sdhci_of_match,
+		.pm = &eswin_sdhci_pmops,
+	},
+	.probe = eswin_sdhci_probe,
+	.remove = eswin_sdhci_remove,
+	.shutdown = eswin_sdhci_shutdown,
+};
+
+module_platform_driver(eswin_sdhci_driver);
+
+MODULE_DESCRIPTION("Driver for the ESWIN SDHCI Controller");
+MODULE_AUTHOR("Shuang Liang <liangshuang@eswincomputing.com>");
+MODULE_AUTHOR("Xuyang Dong <dongxuyang@eswincomputing.com>");
+MODULE_LICENSE("GPL");
