Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 739 insertions, 0 deletions

diff --git a/drivers/mmc/host/sdhci-of-dwcmshc.c b/drivers/mmc/host/sdhci-of-dwcmshc.c
new file mode 100644
index 000000000..3a3bae694
--- /dev/null
+++ b/drivers/mmc/host/sdhci-of-dwcmshc.c
@@ -0,0 +1,739 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Driver for Synopsys DesignWare Cores Mobile Storage Host Controller
+ *
+ * Copyright (C) 2018 Synaptics Incorporated
+ *
+ * Author: Jisheng Zhang <jszhang@kernel.org>
+ */
+
+#include <linux/acpi.h>
+#include <linux/clk.h>
+#include <linux/dma-mapping.h>
+#include <linux/iopoll.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/reset.h>
+#include <linux/sizes.h>
+
+#include "sdhci-pltfm.h"
+
+#define SDHCI_DWCMSHC_ARG2_STUFF	GENMASK(31, 16)
+
+/* DWCMSHC specific Mode Select value */
+#define DWCMSHC_CTRL_HS400		0x7
+
+/* DWC IP vendor area 1 pointer */
+#define DWCMSHC_P_VENDOR_AREA1		0xe8
+#define DWCMSHC_AREA1_MASK		GENMASK(11, 0)
+/* Offset inside the  vendor area 1 */
+#define DWCMSHC_HOST_CTRL3		0x8
+#define DWCMSHC_EMMC_CONTROL		0x2c
+#define DWCMSHC_CARD_IS_EMMC		BIT(0)
+#define DWCMSHC_ENHANCED_STROBE		BIT(8)
+#define DWCMSHC_EMMC_ATCTRL		0x40
+
+/* Rockchip specific Registers */
+#define DWCMSHC_EMMC_DLL_CTRL		0x800
+#define DWCMSHC_EMMC_DLL_RXCLK		0x804
+#define DWCMSHC_EMMC_DLL_TXCLK		0x808
+#define DWCMSHC_EMMC_DLL_STRBIN		0x80c
+#define DECMSHC_EMMC_DLL_CMDOUT		0x810
+#define DWCMSHC_EMMC_DLL_STATUS0	0x840
+#define DWCMSHC_EMMC_DLL_START		BIT(0)
+#define DWCMSHC_EMMC_DLL_LOCKED		BIT(8)
+#define DWCMSHC_EMMC_DLL_TIMEOUT	BIT(9)
+#define DWCMSHC_EMMC_DLL_RXCLK_SRCSEL	29
+#define DWCMSHC_EMMC_DLL_START_POINT	16
+#define DWCMSHC_EMMC_DLL_INC		8
+#define DWCMSHC_EMMC_DLL_BYPASS		BIT(24)
+#define DWCMSHC_EMMC_DLL_DLYENA		BIT(27)
+#define DLL_TXCLK_TAPNUM_DEFAULT	0x10
+#define DLL_TXCLK_TAPNUM_90_DEGREES	0xA
+#define DLL_TXCLK_TAPNUM_FROM_SW	BIT(24)
+#define DLL_STRBIN_TAPNUM_DEFAULT	0x8
+#define DLL_STRBIN_TAPNUM_FROM_SW	BIT(24)
+#define DLL_STRBIN_DELAY_NUM_SEL	BIT(26)
+#define DLL_STRBIN_DELAY_NUM_OFFSET	16
+#define DLL_STRBIN_DELAY_NUM_DEFAULT	0x16
+#define DLL_RXCLK_NO_INVERTER		1
+#define DLL_RXCLK_INVERTER		0
+#define DLL_CMDOUT_TAPNUM_90_DEGREES	0x8
+#define DLL_RXCLK_ORI_GATE		BIT(31)
+#define DLL_CMDOUT_TAPNUM_FROM_SW	BIT(24)
+#define DLL_CMDOUT_SRC_CLK_NEG		BIT(28)
+#define DLL_CMDOUT_EN_SRC_CLK_NEG	BIT(29)
+
+#define DLL_LOCK_WO_TMOUT(x) \
+	((((x) & DWCMSHC_EMMC_DLL_LOCKED) == DWCMSHC_EMMC_DLL_LOCKED) && \
+	(((x) & DWCMSHC_EMMC_DLL_TIMEOUT) == 0))
+#define RK35xx_MAX_CLKS 3
+
+#define BOUNDARY_OK(addr, len) \
+	((addr | (SZ_128M - 1)) == ((addr + len - 1) | (SZ_128M - 1)))
+
+enum dwcmshc_rk_type {
+	DWCMSHC_RK3568,
+	DWCMSHC_RK3588,
+};
+
+struct rk35xx_priv {
+	/* Rockchip specified optional clocks */
+	struct clk_bulk_data rockchip_clks[RK35xx_MAX_CLKS];
+	struct reset_control *reset;
+	enum dwcmshc_rk_type devtype;
+	u8 txclk_tapnum;
+};
+
+struct dwcmshc_priv {
+	struct clk	*bus_clk;
+	int vendor_specific_area1; /* P_VENDOR_SPECIFIC_AREA reg */
+	void *priv; /* pointer to SoC private stuff */
+};
+
+/*
+ * If DMA addr spans 128MB boundary, we split the DMA transfer into two
+ * so that each DMA transfer doesn't exceed the boundary.
+ */
+static void dwcmshc_adma_write_desc(struct sdhci_host *host, void **desc,
+				    dma_addr_t addr, int len, unsigned int cmd)
+{
+	int tmplen, offset;
+
+	if (likely(!len || BOUNDARY_OK(addr, len))) {
+		sdhci_adma_write_desc(host, desc, addr, len, cmd);
+		return;
+	}
+
+	offset = addr & (SZ_128M - 1);
+	tmplen = SZ_128M - offset;
+	sdhci_adma_write_desc(host, desc, addr, tmplen, cmd);
+
+	addr += tmplen;
+	len -= tmplen;
+	sdhci_adma_write_desc(host, desc, addr, len, cmd);
+}
+
+static unsigned int dwcmshc_get_max_clock(struct sdhci_host *host)
+{
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+
+	if (pltfm_host->clk)
+		return sdhci_pltfm_clk_get_max_clock(host);
+	else
+		return pltfm_host->clock;
+}
+
+static unsigned int rk35xx_get_max_clock(struct sdhci_host *host)
+{
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+
+	return clk_round_rate(pltfm_host->clk, ULONG_MAX);
+}
+
+static void dwcmshc_check_auto_cmd23(struct mmc_host *mmc,
+				     struct mmc_request *mrq)
+{
+	struct sdhci_host *host = mmc_priv(mmc);
+
+	/*
+	 * No matter V4 is enabled or not, ARGUMENT2 register is 32-bit
+	 * block count register which doesn't support stuff bits of
+	 * CMD23 argument on dwcmsch host controller.
+	 */
+	if (mrq->sbc && (mrq->sbc->arg & SDHCI_DWCMSHC_ARG2_STUFF))
+		host->flags &= ~SDHCI_AUTO_CMD23;
+	else
+		host->flags |= SDHCI_AUTO_CMD23;
+}
+
+static void dwcmshc_request(struct mmc_host *mmc, struct mmc_request *mrq)
+{
+	dwcmshc_check_auto_cmd23(mmc, mrq);
+
+	sdhci_request(mmc, mrq);
+}
+
+static void dwcmshc_set_uhs_signaling(struct sdhci_host *host,
+				      unsigned int timing)
+{
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct dwcmshc_priv *priv = sdhci_pltfm_priv(pltfm_host);
+	u16 ctrl, 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) ||
+		 (timing == MMC_TIMING_MMC_HS))
+		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) {
+		/* set CARD_IS_EMMC bit to enable Data Strobe for HS400 */
+		ctrl = sdhci_readw(host, priv->vendor_specific_area1 + DWCMSHC_EMMC_CONTROL);
+		ctrl |= DWCMSHC_CARD_IS_EMMC;
+		sdhci_writew(host, ctrl, priv->vendor_specific_area1 + DWCMSHC_EMMC_CONTROL);
+
+		ctrl_2 |= DWCMSHC_CTRL_HS400;
+	}
+
+	sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2);
+}
+
+static void dwcmshc_hs400_enhanced_strobe(struct mmc_host *mmc,
+					  struct mmc_ios *ios)
+{
+	u32 vendor;
+	struct sdhci_host *host = mmc_priv(mmc);
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct dwcmshc_priv *priv = sdhci_pltfm_priv(pltfm_host);
+	int reg = priv->vendor_specific_area1 + DWCMSHC_EMMC_CONTROL;
+
+	vendor = sdhci_readl(host, reg);
+	if (ios->enhanced_strobe)
+		vendor |= DWCMSHC_ENHANCED_STROBE;
+	else
+		vendor &= ~DWCMSHC_ENHANCED_STROBE;
+
+	sdhci_writel(host, vendor, reg);
+}
+
+static void dwcmshc_rk3568_set_clock(struct sdhci_host *host, unsigned int clock)
+{
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct dwcmshc_priv *dwc_priv = sdhci_pltfm_priv(pltfm_host);
+	struct rk35xx_priv *priv = dwc_priv->priv;
+	u8 txclk_tapnum = DLL_TXCLK_TAPNUM_DEFAULT;
+	u32 extra, reg;
+	int err;
+
+	host->mmc->actual_clock = 0;
+
+	if (clock == 0) {
+		/* Disable interface clock at initial state. */
+		sdhci_set_clock(host, clock);
+		return;
+	}
+
+	/* Rockchip platform only support 375KHz for identify mode */
+	if (clock <= 400000)
+		clock = 375000;
+
+	err = clk_set_rate(pltfm_host->clk, clock);
+	if (err)
+		dev_err(mmc_dev(host->mmc), "fail to set clock %d", clock);
+
+	sdhci_set_clock(host, clock);
+
+	/* Disable cmd conflict check */
+	reg = dwc_priv->vendor_specific_area1 + DWCMSHC_HOST_CTRL3;
+	extra = sdhci_readl(host, reg);
+	extra &= ~BIT(0);
+	sdhci_writel(host, extra, reg);
+
+	if (clock <= 52000000) {
+		/*
+		 * Disable DLL and reset both of sample and drive clock.
+		 * The bypass bit and start bit need to be set if DLL is not locked.
+		 */
+		sdhci_writel(host, DWCMSHC_EMMC_DLL_BYPASS | DWCMSHC_EMMC_DLL_START, DWCMSHC_EMMC_DLL_CTRL);
+		sdhci_writel(host, DLL_RXCLK_ORI_GATE, DWCMSHC_EMMC_DLL_RXCLK);
+		sdhci_writel(host, 0, DWCMSHC_EMMC_DLL_TXCLK);
+		sdhci_writel(host, 0, DECMSHC_EMMC_DLL_CMDOUT);
+		/*
+		 * Before switching to hs400es mode, the driver will enable
+		 * enhanced strobe first. PHY needs to configure the parameters
+		 * of enhanced strobe first.
+		 */
+		extra = DWCMSHC_EMMC_DLL_DLYENA |
+			DLL_STRBIN_DELAY_NUM_SEL |
+			DLL_STRBIN_DELAY_NUM_DEFAULT << DLL_STRBIN_DELAY_NUM_OFFSET;
+		sdhci_writel(host, extra, DWCMSHC_EMMC_DLL_STRBIN);
+		return;
+	}
+
+	/* Reset DLL */
+	sdhci_writel(host, BIT(1), DWCMSHC_EMMC_DLL_CTRL);
+	udelay(1);
+	sdhci_writel(host, 0x0, DWCMSHC_EMMC_DLL_CTRL);
+
+	/*
+	 * We shouldn't set DLL_RXCLK_NO_INVERTER for identify mode but
+	 * we must set it in higher speed mode.
+	 */
+	extra = DWCMSHC_EMMC_DLL_DLYENA;
+	if (priv->devtype == DWCMSHC_RK3568)
+		extra |= DLL_RXCLK_NO_INVERTER << DWCMSHC_EMMC_DLL_RXCLK_SRCSEL;
+	sdhci_writel(host, extra, DWCMSHC_EMMC_DLL_RXCLK);
+
+	/* Init DLL settings */
+	extra = 0x5 << DWCMSHC_EMMC_DLL_START_POINT |
+		0x2 << DWCMSHC_EMMC_DLL_INC |
+		DWCMSHC_EMMC_DLL_START;
+	sdhci_writel(host, extra, DWCMSHC_EMMC_DLL_CTRL);
+	err = readl_poll_timeout(host->ioaddr + DWCMSHC_EMMC_DLL_STATUS0,
+				 extra, DLL_LOCK_WO_TMOUT(extra), 1,
+				 500 * USEC_PER_MSEC);
+	if (err) {
+		dev_err(mmc_dev(host->mmc), "DLL lock timeout!\n");
+		return;
+	}
+
+	extra = 0x1 << 16 | /* tune clock stop en */
+		0x3 << 17 | /* pre-change delay */
+		0x3 << 19;  /* post-change delay */
+	sdhci_writel(host, extra, dwc_priv->vendor_specific_area1 + DWCMSHC_EMMC_ATCTRL);
+
+	if (host->mmc->ios.timing == MMC_TIMING_MMC_HS200 ||
+	    host->mmc->ios.timing == MMC_TIMING_MMC_HS400)
+		txclk_tapnum = priv->txclk_tapnum;
+
+	if ((priv->devtype == DWCMSHC_RK3588) && host->mmc->ios.timing == MMC_TIMING_MMC_HS400) {
+		txclk_tapnum = DLL_TXCLK_TAPNUM_90_DEGREES;
+
+		extra = DLL_CMDOUT_SRC_CLK_NEG |
+			DLL_CMDOUT_EN_SRC_CLK_NEG |
+			DWCMSHC_EMMC_DLL_DLYENA |
+			DLL_CMDOUT_TAPNUM_90_DEGREES |
+			DLL_CMDOUT_TAPNUM_FROM_SW;
+		sdhci_writel(host, extra, DECMSHC_EMMC_DLL_CMDOUT);
+	}
+
+	extra = DWCMSHC_EMMC_DLL_DLYENA |
+		DLL_TXCLK_TAPNUM_FROM_SW |
+		DLL_RXCLK_NO_INVERTER << DWCMSHC_EMMC_DLL_RXCLK_SRCSEL |
+		txclk_tapnum;
+	sdhci_writel(host, extra, DWCMSHC_EMMC_DLL_TXCLK);
+
+	extra = DWCMSHC_EMMC_DLL_DLYENA |
+		DLL_STRBIN_TAPNUM_DEFAULT |
+		DLL_STRBIN_TAPNUM_FROM_SW;
+	sdhci_writel(host, extra, DWCMSHC_EMMC_DLL_STRBIN);
+}
+
+static void rk35xx_sdhci_reset(struct sdhci_host *host, u8 mask)
+{
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct dwcmshc_priv *dwc_priv = sdhci_pltfm_priv(pltfm_host);
+	struct rk35xx_priv *priv = dwc_priv->priv;
+
+	if (mask & SDHCI_RESET_ALL && priv->reset) {
+		reset_control_assert(priv->reset);
+		udelay(1);
+		reset_control_deassert(priv->reset);
+	}
+
+	sdhci_reset(host, mask);
+}
+
+static const struct sdhci_ops sdhci_dwcmshc_ops = {
+	.set_clock		= sdhci_set_clock,
+	.set_bus_width		= sdhci_set_bus_width,
+	.set_uhs_signaling	= dwcmshc_set_uhs_signaling,
+	.get_max_clock		= dwcmshc_get_max_clock,
+	.reset			= sdhci_reset,
+	.adma_write_desc	= dwcmshc_adma_write_desc,
+};
+
+static const struct sdhci_ops sdhci_dwcmshc_rk35xx_ops = {
+	.set_clock		= dwcmshc_rk3568_set_clock,
+	.set_bus_width		= sdhci_set_bus_width,
+	.set_uhs_signaling	= dwcmshc_set_uhs_signaling,
+	.get_max_clock		= rk35xx_get_max_clock,
+	.reset			= rk35xx_sdhci_reset,
+	.adma_write_desc	= dwcmshc_adma_write_desc,
+};
+
+static const struct sdhci_pltfm_data sdhci_dwcmshc_pdata = {
+	.ops = &sdhci_dwcmshc_ops,
+	.quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN,
+	.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN,
+};
+
+#ifdef CONFIG_ACPI
+static const struct sdhci_pltfm_data sdhci_dwcmshc_bf3_pdata = {
+	.ops = &sdhci_dwcmshc_ops,
+	.quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN,
+	.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
+		   SDHCI_QUIRK2_ACMD23_BROKEN,
+};
+#endif
+
+static const struct sdhci_pltfm_data sdhci_dwcmshc_rk35xx_pdata = {
+	.ops = &sdhci_dwcmshc_rk35xx_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,
+};
+
+static int dwcmshc_rk35xx_init(struct sdhci_host *host, struct dwcmshc_priv *dwc_priv)
+{
+	int err;
+	struct rk35xx_priv *priv = dwc_priv->priv;
+
+	priv->reset = devm_reset_control_array_get_optional_exclusive(mmc_dev(host->mmc));
+	if (IS_ERR(priv->reset)) {
+		err = PTR_ERR(priv->reset);
+		dev_err(mmc_dev(host->mmc), "failed to get reset control %d\n", err);
+		return err;
+	}
+
+	priv->rockchip_clks[0].id = "axi";
+	priv->rockchip_clks[1].id = "block";
+	priv->rockchip_clks[2].id = "timer";
+	err = devm_clk_bulk_get_optional(mmc_dev(host->mmc), RK35xx_MAX_CLKS,
+					 priv->rockchip_clks);
+	if (err) {
+		dev_err(mmc_dev(host->mmc), "failed to get clocks %d\n", err);
+		return err;
+	}
+
+	err = clk_bulk_prepare_enable(RK35xx_MAX_CLKS, priv->rockchip_clks);
+	if (err) {
+		dev_err(mmc_dev(host->mmc), "failed to enable clocks %d\n", err);
+		return err;
+	}
+
+	if (of_property_read_u8(mmc_dev(host->mmc)->of_node, "rockchip,txclk-tapnum",
+				&priv->txclk_tapnum))
+		priv->txclk_tapnum = DLL_TXCLK_TAPNUM_DEFAULT;
+
+	/* Disable cmd conflict check */
+	sdhci_writel(host, 0x0, dwc_priv->vendor_specific_area1 + DWCMSHC_HOST_CTRL3);
+	/* Reset previous settings */
+	sdhci_writel(host, 0, DWCMSHC_EMMC_DLL_TXCLK);
+	sdhci_writel(host, 0, DWCMSHC_EMMC_DLL_STRBIN);
+
+	return 0;
+}
+
+static void dwcmshc_rk35xx_postinit(struct sdhci_host *host, struct dwcmshc_priv *dwc_priv)
+{
+	/*
+	 * Don't support highspeed bus mode with low clk speed as we
+	 * cannot use DLL for this condition.
+	 */
+	if (host->mmc->f_max <= 52000000) {
+		dev_info(mmc_dev(host->mmc), "Disabling HS200/HS400, frequency too low (%d)\n",
+			 host->mmc->f_max);
+		host->mmc->caps2 &= ~(MMC_CAP2_HS200 | MMC_CAP2_HS400);
+		host->mmc->caps &= ~(MMC_CAP_3_3V_DDR | MMC_CAP_1_8V_DDR);
+	}
+}
+
+static const struct of_device_id sdhci_dwcmshc_dt_ids[] = {
+	{
+		.compatible = "rockchip,rk3588-dwcmshc",
+		.data = &sdhci_dwcmshc_rk35xx_pdata,
+	},
+	{
+		.compatible = "rockchip,rk3568-dwcmshc",
+		.data = &sdhci_dwcmshc_rk35xx_pdata,
+	},
+	{
+		.compatible = "snps,dwcmshc-sdhci",
+		.data = &sdhci_dwcmshc_pdata,
+	},
+	{},
+};
+MODULE_DEVICE_TABLE(of, sdhci_dwcmshc_dt_ids);
+
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id sdhci_dwcmshc_acpi_ids[] = {
+	{
+		.id = "MLNXBF30",
+		.driver_data = (kernel_ulong_t)&sdhci_dwcmshc_bf3_pdata,
+	},
+	{}
+};
+MODULE_DEVICE_TABLE(acpi, sdhci_dwcmshc_acpi_ids);
+#endif
+
+static int dwcmshc_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct sdhci_pltfm_host *pltfm_host;
+	struct sdhci_host *host;
+	struct dwcmshc_priv *priv;
+	struct rk35xx_priv *rk_priv = NULL;
+	const struct sdhci_pltfm_data *pltfm_data;
+	int err;
+	u32 extra;
+
+	pltfm_data = device_get_match_data(&pdev->dev);
+	if (!pltfm_data) {
+		dev_err(&pdev->dev, "Error: No device match data found\n");
+		return -ENODEV;
+	}
+
+	host = sdhci_pltfm_init(pdev, pltfm_data,
+				sizeof(struct dwcmshc_priv));
+	if (IS_ERR(host))
+		return PTR_ERR(host);
+
+	/*
+	 * extra adma table cnt for cross 128M boundary handling.
+	 */
+	extra = DIV_ROUND_UP_ULL(dma_get_required_mask(dev), SZ_128M);
+	if (extra > SDHCI_MAX_SEGS)
+		extra = SDHCI_MAX_SEGS;
+	host->adma_table_cnt += extra;
+
+	pltfm_host = sdhci_priv(host);
+	priv = sdhci_pltfm_priv(pltfm_host);
+
+	if (dev->of_node) {
+		pltfm_host->clk = devm_clk_get(dev, "core");
+		if (IS_ERR(pltfm_host->clk)) {
+			err = PTR_ERR(pltfm_host->clk);
+			dev_err(dev, "failed to get core clk: %d\n", err);
+			goto free_pltfm;
+		}
+		err = clk_prepare_enable(pltfm_host->clk);
+		if (err)
+			goto free_pltfm;
+
+		priv->bus_clk = devm_clk_get(dev, "bus");
+		if (!IS_ERR(priv->bus_clk))
+			clk_prepare_enable(priv->bus_clk);
+	}
+
+	err = mmc_of_parse(host->mmc);
+	if (err)
+		goto err_clk;
+
+	sdhci_get_of_property(pdev);
+
+	priv->vendor_specific_area1 =
+		sdhci_readl(host, DWCMSHC_P_VENDOR_AREA1) & DWCMSHC_AREA1_MASK;
+
+	host->mmc_host_ops.request = dwcmshc_request;
+	host->mmc_host_ops.hs400_enhanced_strobe = dwcmshc_hs400_enhanced_strobe;
+
+	if (pltfm_data == &sdhci_dwcmshc_rk35xx_pdata) {
+		rk_priv = devm_kzalloc(&pdev->dev, sizeof(struct rk35xx_priv), GFP_KERNEL);
+		if (!rk_priv) {
+			err = -ENOMEM;
+			goto err_clk;
+		}
+
+		if (of_device_is_compatible(pdev->dev.of_node, "rockchip,rk3588-dwcmshc"))
+			rk_priv->devtype = DWCMSHC_RK3588;
+		else
+			rk_priv->devtype = DWCMSHC_RK3568;
+
+		priv->priv = rk_priv;
+
+		err = dwcmshc_rk35xx_init(host, priv);
+		if (err)
+			goto err_clk;
+	}
+
+#ifdef CONFIG_ACPI
+	if (pltfm_data == &sdhci_dwcmshc_bf3_pdata)
+		sdhci_enable_v4_mode(host);
+#endif
+
+	host->mmc->caps |= MMC_CAP_WAIT_WHILE_BUSY;
+
+	pm_runtime_get_noresume(dev);
+	pm_runtime_set_active(dev);
+	pm_runtime_enable(dev);
+
+	err = sdhci_setup_host(host);
+	if (err)
+		goto err_rpm;
+
+	if (rk_priv)
+		dwcmshc_rk35xx_postinit(host, priv);
+
+	err = __sdhci_add_host(host);
+	if (err)
+		goto err_setup_host;
+
+	pm_runtime_put(dev);
+
+	return 0;
+
+err_setup_host:
+	sdhci_cleanup_host(host);
+err_rpm:
+	pm_runtime_disable(dev);
+	pm_runtime_put_noidle(dev);
+err_clk:
+	clk_disable_unprepare(pltfm_host->clk);
+	clk_disable_unprepare(priv->bus_clk);
+	if (rk_priv)
+		clk_bulk_disable_unprepare(RK35xx_MAX_CLKS,
+					   rk_priv->rockchip_clks);
+free_pltfm:
+	sdhci_pltfm_free(pdev);
+	return err;
+}
+
+static void dwcmshc_remove(struct platform_device *pdev)
+{
+	struct sdhci_host *host = platform_get_drvdata(pdev);
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct dwcmshc_priv *priv = sdhci_pltfm_priv(pltfm_host);
+	struct rk35xx_priv *rk_priv = priv->priv;
+
+	sdhci_remove_host(host, 0);
+
+	clk_disable_unprepare(pltfm_host->clk);
+	clk_disable_unprepare(priv->bus_clk);
+	if (rk_priv)
+		clk_bulk_disable_unprepare(RK35xx_MAX_CLKS,
+					   rk_priv->rockchip_clks);
+	sdhci_pltfm_free(pdev);
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int dwcmshc_suspend(struct device *dev)
+{
+	struct sdhci_host *host = dev_get_drvdata(dev);
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct dwcmshc_priv *priv = sdhci_pltfm_priv(pltfm_host);
+	struct rk35xx_priv *rk_priv = priv->priv;
+	int ret;
+
+	pm_runtime_resume(dev);
+
+	ret = sdhci_suspend_host(host);
+	if (ret)
+		return ret;
+
+	clk_disable_unprepare(pltfm_host->clk);
+	if (!IS_ERR(priv->bus_clk))
+		clk_disable_unprepare(priv->bus_clk);
+
+	if (rk_priv)
+		clk_bulk_disable_unprepare(RK35xx_MAX_CLKS,
+					   rk_priv->rockchip_clks);
+
+	return ret;
+}
+
+static int dwcmshc_resume(struct device *dev)
+{
+	struct sdhci_host *host = dev_get_drvdata(dev);
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct dwcmshc_priv *priv = sdhci_pltfm_priv(pltfm_host);
+	struct rk35xx_priv *rk_priv = priv->priv;
+	int ret;
+
+	ret = clk_prepare_enable(pltfm_host->clk);
+	if (ret)
+		return ret;
+
+	if (!IS_ERR(priv->bus_clk)) {
+		ret = clk_prepare_enable(priv->bus_clk);
+		if (ret)
+			goto disable_clk;
+	}
+
+	if (rk_priv) {
+		ret = clk_bulk_prepare_enable(RK35xx_MAX_CLKS,
+					      rk_priv->rockchip_clks);
+		if (ret)
+			goto disable_bus_clk;
+	}
+
+	ret = sdhci_resume_host(host);
+	if (ret)
+		goto disable_rockchip_clks;
+
+	return 0;
+
+disable_rockchip_clks:
+	if (rk_priv)
+		clk_bulk_disable_unprepare(RK35xx_MAX_CLKS,
+					   rk_priv->rockchip_clks);
+disable_bus_clk:
+	if (!IS_ERR(priv->bus_clk))
+		clk_disable_unprepare(priv->bus_clk);
+disable_clk:
+	clk_disable_unprepare(pltfm_host->clk);
+	return ret;
+}
+#endif
+
+#ifdef CONFIG_PM
+
+static void dwcmshc_enable_card_clk(struct sdhci_host *host)
+{
+	u16 ctrl;
+
+	ctrl = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
+	if ((ctrl & SDHCI_CLOCK_INT_EN) && !(ctrl & SDHCI_CLOCK_CARD_EN)) {
+		ctrl |= SDHCI_CLOCK_CARD_EN;
+		sdhci_writew(host, ctrl, SDHCI_CLOCK_CONTROL);
+	}
+}
+
+static void dwcmshc_disable_card_clk(struct sdhci_host *host)
+{
+	u16 ctrl;
+
+	ctrl = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
+	if (ctrl & SDHCI_CLOCK_CARD_EN) {
+		ctrl &= ~SDHCI_CLOCK_CARD_EN;
+		sdhci_writew(host, ctrl, SDHCI_CLOCK_CONTROL);
+	}
+}
+
+static int dwcmshc_runtime_suspend(struct device *dev)
+{
+	struct sdhci_host *host = dev_get_drvdata(dev);
+
+	dwcmshc_disable_card_clk(host);
+
+	return 0;
+}
+
+static int dwcmshc_runtime_resume(struct device *dev)
+{
+	struct sdhci_host *host = dev_get_drvdata(dev);
+
+	dwcmshc_enable_card_clk(host);
+
+	return 0;
+}
+
+#endif
+
+static const struct dev_pm_ops dwcmshc_pmops = {
+	SET_SYSTEM_SLEEP_PM_OPS(dwcmshc_suspend, dwcmshc_resume)
+	SET_RUNTIME_PM_OPS(dwcmshc_runtime_suspend,
+			   dwcmshc_runtime_resume, NULL)
+};
+
+static struct platform_driver sdhci_dwcmshc_driver = {
+	.driver	= {
+		.name	= "sdhci-dwcmshc",
+		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
+		.of_match_table = sdhci_dwcmshc_dt_ids,
+		.acpi_match_table = ACPI_PTR(sdhci_dwcmshc_acpi_ids),
+		.pm = &dwcmshc_pmops,
+	},
+	.probe	= dwcmshc_probe,
+	.remove_new = dwcmshc_remove,
+};
+module_platform_driver(sdhci_dwcmshc_driver);
+
+MODULE_DESCRIPTION("SDHCI platform driver for Synopsys DWC MSHC");
+MODULE_AUTHOR("Jisheng Zhang <jszhang@kernel.org>");
+MODULE_LICENSE("GPL v2");