drivers/mmc/rockchip_sdhci.c - platform/external/u-boot - Gitiles

 // SPDX-License-Identifier: GPL-2.0+
 /*
  * (C) Copyright 2016 Fuzhou Rockchip Electronics Co., Ltd
  *
  * Rockchip SD Host Controller Interface
  */

 #include <common.h>
 #include <clk.h>
 #include <dm.h>
 #include <dm/ofnode.h>
 #include <dt-structs.h>
 #include <linux/delay.h>
 #include <linux/err.h>
 #include <linux/libfdt.h>
 #include <linux/iopoll.h>
 #include <malloc.h>
 #include <mapmem.h>
 #include "mmc_private.h"
 #include <sdhci.h>
 #include <syscon.h>
 #include <asm/arch-rockchip/clock.h>
 #include <asm/arch-rockchip/hardware.h>

 /* 400KHz is max freq for card ID etc. Use that as min */
 #define EMMC_MIN_FREQ	400000
 #define KHz	(1000)
 #define MHz	(1000 * KHz)
 #define SDHCI_TUNING_LOOP_COUNT		40

 #define PHYCTRL_CALDONE_MASK		0x1
 #define PHYCTRL_CALDONE_SHIFT		0x6
 #define PHYCTRL_CALDONE_DONE		0x1
 #define PHYCTRL_DLLRDY_MASK		0x1
 #define PHYCTRL_DLLRDY_SHIFT		0x5
 #define PHYCTRL_DLLRDY_DONE		0x1
 #define PHYCTRL_FREQSEL_200M		0x0
 #define PHYCTRL_FREQSEL_50M		0x1
 #define PHYCTRL_FREQSEL_100M		0x2
 #define PHYCTRL_FREQSEL_150M		0x3
 #define PHYCTRL_DLL_LOCK_WO_TMOUT(x)	\
 	((((x) >> PHYCTRL_DLLRDY_SHIFT) & PHYCTRL_DLLRDY_MASK) ==\
 	PHYCTRL_DLLRDY_DONE)

 /* Rockchip specific Registers */
 #define DWCMSHC_EMMC_DLL_CTRL		0x800
 #define DWCMSHC_EMMC_DLL_CTRL_RESET	BIT(1)
 #define DWCMSHC_EMMC_DLL_RXCLK		0x804
 #define DWCMSHC_EMMC_DLL_TXCLK		0x808
 #define DWCMSHC_EMMC_DLL_STRBIN		0x80c
 #define DWCMSHC_EMMC_DLL_STATUS0	0x840
 #define DWCMSHC_EMMC_DLL_STATUS1	0x844
 #define DWCMSHC_EMMC_DLL_START		BIT(0)
 #define DWCMSHC_EMMC_DLL_RXCLK_SRCSEL	29
 #define DWCMSHC_EMMC_DLL_START_POINT	16
 #define DWCMSHC_EMMC_DLL_START_DEFAULT	5
 #define DWCMSHC_EMMC_DLL_INC_VALUE	2
 #define DWCMSHC_EMMC_DLL_INC		8
 #define DWCMSHC_EMMC_DLL_DLYENA		BIT(27)
 #define DLL_TXCLK_TAPNUM_DEFAULT	0x10
 #define DLL_STRBIN_TAPNUM_DEFAULT	0x3
 #define DLL_TXCLK_TAPNUM_FROM_SW	BIT(24)
 #define DWCMSHC_EMMC_DLL_LOCKED		BIT(8)
 #define DWCMSHC_EMMC_DLL_TIMEOUT	BIT(9)
 #define DLL_RXCLK_NO_INVERTER		1
 #define DLL_RXCLK_INVERTER		0
 #define DWCMSHC_ENHANCED_STROBE		BIT(8)
 #define DLL_LOCK_WO_TMOUT(x) \
 	((((x) & DWCMSHC_EMMC_DLL_LOCKED) == DWCMSHC_EMMC_DLL_LOCKED) && \
 	(((x) & DWCMSHC_EMMC_DLL_TIMEOUT) == 0))
 #define ROCKCHIP_MAX_CLKS		3

 struct rockchip_sdhc_plat {
 	struct mmc_config cfg;
 	struct mmc mmc;
 };

 struct rockchip_emmc_phy {
 	u32 emmcphy_con[7];
 	u32 reserved;
 	u32 emmcphy_status;
 };

 struct rockchip_sdhc {
 	struct sdhci_host host;
 	struct udevice *dev;
 	void *base;
 	struct rockchip_emmc_phy *phy;
 	struct clk emmc_clk;
 };

 struct sdhci_data {
 	int (*emmc_set_clock)(struct sdhci_host *host, unsigned int clock);
 	int (*emmc_phy_init)(struct udevice *dev);
 	int (*get_phy)(struct udevice *dev);
 };

 static int rk3399_emmc_phy_init(struct udevice *dev)
 {
 	return 0;
 }

 static void rk3399_emmc_phy_power_on(struct rockchip_emmc_phy *phy, u32 clock)
 {
 	u32 caldone, dllrdy, freqsel;

 	writel(RK_CLRSETBITS(7 << 4, 0), &phy->emmcphy_con[6]);
 	writel(RK_CLRSETBITS(1 << 11, 1 << 11), &phy->emmcphy_con[0]);
 	writel(RK_CLRSETBITS(0xf << 7, 6 << 7), &phy->emmcphy_con[0]);

 	/*
 	 * According to the user manual, calpad calibration
 	 * cycle takes more than 2us without the minimal recommended
 	 * value, so we may need a little margin here
 	 */
 	udelay(3);
 	writel(RK_CLRSETBITS(1, 1), &phy->emmcphy_con[6]);

 	/*
 	 * According to the user manual, it asks driver to
 	 * wait 5us for calpad busy trimming. But it seems that
 	 * 5us of caldone isn't enough for all cases.
 	 */
 	udelay(500);
 	caldone = readl(&phy->emmcphy_status);
 	caldone = (caldone >> PHYCTRL_CALDONE_SHIFT) & PHYCTRL_CALDONE_MASK;
 	if (caldone != PHYCTRL_CALDONE_DONE) {
 		printf("%s: caldone timeout.\n", __func__);
 		return;
 	}

 	/* Set the frequency of the DLL operation */
 	if (clock < 75 * MHz)
 		freqsel = PHYCTRL_FREQSEL_50M;
 	else if (clock < 125 * MHz)
 		freqsel = PHYCTRL_FREQSEL_100M;
 	else if (clock < 175 * MHz)
 		freqsel = PHYCTRL_FREQSEL_150M;
 	else
 		freqsel = PHYCTRL_FREQSEL_200M;

 	/* Set the frequency of the DLL operation */
 	writel(RK_CLRSETBITS(3 << 12, freqsel << 12), &phy->emmcphy_con[0]);
 	writel(RK_CLRSETBITS(1 << 1, 1 << 1), &phy->emmcphy_con[6]);

 	/* REN Enable on STRB Line for HS400 */
 	writel(RK_CLRSETBITS(0, 1 << 9), &phy->emmcphy_con[2]);

 	read_poll_timeout(readl, &phy->emmcphy_status, dllrdy,
 			  PHYCTRL_DLL_LOCK_WO_TMOUT(dllrdy), 1, 5000);
 }

 static void rk3399_emmc_phy_power_off(struct rockchip_emmc_phy *phy)
 {
 	writel(RK_CLRSETBITS(1, 0), &phy->emmcphy_con[6]);
 	writel(RK_CLRSETBITS(1 << 1, 0), &phy->emmcphy_con[6]);
 }

 static int rk3399_emmc_get_phy(struct udevice *dev)
 {
 	struct rockchip_sdhc *priv = dev_get_priv(dev);
 	ofnode phy_node;
 	void *grf_base;
 	u32 grf_phy_offset, phandle;

 	phandle = dev_read_u32_default(dev, "phys", 0);
 	phy_node = ofnode_get_by_phandle(phandle);
 	if (!ofnode_valid(phy_node)) {
 		debug("Not found emmc phy device\n");
 		return -ENODEV;
 	}

 	grf_base = syscon_get_first_range(ROCKCHIP_SYSCON_GRF);
 	if (grf_base < 0) {
 		printf("%s Get syscon grf failed", __func__);
 		return -ENODEV;
 	}
 	grf_phy_offset = ofnode_read_u32_default(phy_node, "reg", 0);

 	priv->phy = (struct rockchip_emmc_phy *)(grf_base + grf_phy_offset);

 	return 0;
 }

 static int rk3399_sdhci_emmc_set_clock(struct sdhci_host *host, unsigned int clock)
 {
 	struct rockchip_sdhc *priv = container_of(host, struct rockchip_sdhc, host);
 	int cycle_phy = host->clock != clock && clock > EMMC_MIN_FREQ;

 	if (cycle_phy)
 		rk3399_emmc_phy_power_off(priv->phy);

 	sdhci_set_clock(host->mmc, clock);

 	if (cycle_phy)
 		rk3399_emmc_phy_power_on(priv->phy, clock);

 	return 0;
 }

 static int rk3568_emmc_phy_init(struct udevice *dev)
 {
 	struct rockchip_sdhc *prv = dev_get_priv(dev);
 	struct sdhci_host *host = &prv->host;
 	u32 extra;

 	extra = DLL_RXCLK_NO_INVERTER << DWCMSHC_EMMC_DLL_RXCLK_SRCSEL;
 	sdhci_writel(host, extra, DWCMSHC_EMMC_DLL_RXCLK);

 	return 0;
 }

 static int rk3568_sdhci_emmc_set_clock(struct sdhci_host *host, unsigned int clock)
 {
 	struct rockchip_sdhc *priv = container_of(host, struct rockchip_sdhc, host);
 	int val, ret;
 	u32 extra;

 	if (clock > host->max_clk)
 		clock = host->max_clk;
 	if (clock)
 		clk_set_rate(&priv->emmc_clk, clock);

 	sdhci_set_clock(host->mmc, clock);

 	if (clock >= 100 * MHz) {
 		/* reset DLL */
 		sdhci_writel(host, DWCMSHC_EMMC_DLL_CTRL_RESET, DWCMSHC_EMMC_DLL_CTRL);
 		udelay(1);
 		sdhci_writel(host, 0, DWCMSHC_EMMC_DLL_CTRL);

 		/* Init DLL settings */
 		extra = DWCMSHC_EMMC_DLL_START_DEFAULT << DWCMSHC_EMMC_DLL_START_POINT |
 			DWCMSHC_EMMC_DLL_INC_VALUE << DWCMSHC_EMMC_DLL_INC |
 			DWCMSHC_EMMC_DLL_START;
 		sdhci_writel(host, extra, DWCMSHC_EMMC_DLL_CTRL);

 		ret = read_poll_timeout(readl, host->ioaddr + DWCMSHC_EMMC_DLL_STATUS0,
 					val, DLL_LOCK_WO_TMOUT(val), 1, 500);
 		if (ret)
 			return ret;

 		extra = DWCMSHC_EMMC_DLL_DLYENA |
 			DLL_RXCLK_NO_INVERTER << DWCMSHC_EMMC_DLL_RXCLK_SRCSEL;
 		sdhci_writel(host, extra, DWCMSHC_EMMC_DLL_RXCLK);

 		extra = DWCMSHC_EMMC_DLL_DLYENA |
 			DLL_TXCLK_TAPNUM_DEFAULT |
 			DLL_TXCLK_TAPNUM_FROM_SW;
 		sdhci_writel(host, extra, DWCMSHC_EMMC_DLL_TXCLK);

 		extra = DWCMSHC_EMMC_DLL_DLYENA |
 			DLL_STRBIN_TAPNUM_DEFAULT;
 		sdhci_writel(host, extra, DWCMSHC_EMMC_DLL_STRBIN);
 	} else {
 		/* reset the clock phase when the frequency is lower than 100MHz */
 		sdhci_writel(host, 0, DWCMSHC_EMMC_DLL_CTRL);
 		extra = DLL_RXCLK_NO_INVERTER << DWCMSHC_EMMC_DLL_RXCLK_SRCSEL;
 		sdhci_writel(host, extra, DWCMSHC_EMMC_DLL_RXCLK);
 		sdhci_writel(host, 0, DWCMSHC_EMMC_DLL_TXCLK);
 		sdhci_writel(host, 0, DWCMSHC_EMMC_DLL_STRBIN);
 	}

 	return 0;
 }

 static int rk3568_emmc_get_phy(struct udevice *dev)
 {
 	return 0;
 }

 static int rockchip_sdhci_set_ios_post(struct sdhci_host *host)
 {
 	struct rockchip_sdhc *priv = container_of(host, struct rockchip_sdhc, host);
 	struct sdhci_data *data = (struct sdhci_data *)dev_get_driver_data(priv->dev);
 	struct mmc *mmc = host->mmc;
 	uint clock = mmc->tran_speed;
 	u32 reg;

 	if (!clock)
 		clock = mmc->clock;

 	if (data->emmc_set_clock)
 		data->emmc_set_clock(host, clock);

 	if (mmc->selected_mode == MMC_HS_400 || mmc->selected_mode == MMC_HS_400_ES) {
 		reg = sdhci_readw(host, SDHCI_HOST_CONTROL2);
 		reg &= ~SDHCI_CTRL_UHS_MASK;
 		reg |= SDHCI_CTRL_HS400;
 		sdhci_writew(host, reg, SDHCI_HOST_CONTROL2);
 	} else {
 		sdhci_set_uhs_timing(host);
 	}

 	return 0;
 }

 static int rockchip_sdhci_execute_tuning(struct mmc *mmc, u8 opcode)
 {
 	struct sdhci_host *host = dev_get_priv(mmc->dev);
 	char tuning_loop_counter = SDHCI_TUNING_LOOP_COUNT;
 	struct mmc_cmd cmd;
 	u32 ctrl, blk_size;
 	int ret = 0;

 	ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
 	ctrl |= SDHCI_CTRL_EXEC_TUNING;
 	sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2);

 	sdhci_writel(host, SDHCI_INT_DATA_AVAIL, SDHCI_INT_ENABLE);
 	sdhci_writel(host, SDHCI_INT_DATA_AVAIL, SDHCI_SIGNAL_ENABLE);

 	blk_size = SDHCI_MAKE_BLKSZ(SDHCI_DEFAULT_BOUNDARY_ARG, 64);
 	if (opcode == MMC_CMD_SEND_TUNING_BLOCK_HS200 && host->mmc->bus_width == 8)
 		blk_size = SDHCI_MAKE_BLKSZ(SDHCI_DEFAULT_BOUNDARY_ARG, 128);
 	sdhci_writew(host, blk_size, SDHCI_BLOCK_SIZE);
 	sdhci_writew(host, SDHCI_TRNS_READ, SDHCI_TRANSFER_MODE);

 	cmd.cmdidx = opcode;
 	cmd.resp_type = MMC_RSP_R1;
 	cmd.cmdarg = 0;

 	do {
 		if (tuning_loop_counter-- == 0)
 			break;

 		mmc_send_cmd(mmc, &cmd, NULL);

 		if (opcode == MMC_CMD_SEND_TUNING_BLOCK)
 			/*
 			 * For tuning command, do not do busy loop. As tuning
 			 * is happening (CLK-DATA latching for setup/hold time
 			 * requirements), give time to complete
 			 */
 			udelay(1);

 		ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
 	} while (ctrl & SDHCI_CTRL_EXEC_TUNING);

 	if (!(ctrl & SDHCI_CTRL_TUNED_CLK)) {
 		printf("%s:Tuning failed\n", __func__);
 		ret = -EIO;
 	}

 	if (tuning_loop_counter < 0) {
 		ctrl &= ~SDHCI_CTRL_TUNED_CLK;
 		sdhci_writel(host, ctrl, SDHCI_HOST_CONTROL2);
 	}

 	/* Enable only interrupts served by the SD controller */
 	sdhci_writel(host, SDHCI_INT_DATA_MASK | SDHCI_INT_CMD_MASK, SDHCI_INT_ENABLE);
 	/* Mask all sdhci interrupt sources */
 	sdhci_writel(host, 0x0, SDHCI_SIGNAL_ENABLE);

 	return ret;
 }

 static struct sdhci_ops rockchip_sdhci_ops = {
 	.set_ios_post	= rockchip_sdhci_set_ios_post,
 	.platform_execute_tuning = &rockchip_sdhci_execute_tuning,
 };

 static int rockchip_sdhci_probe(struct udevice *dev)
 {
 	struct sdhci_data *data = (struct sdhci_data *)dev_get_driver_data(dev);
 	struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
 	struct rockchip_sdhc_plat *plat = dev_get_plat(dev);
 	struct rockchip_sdhc *prv = dev_get_priv(dev);
 	struct mmc_config *cfg = &plat->cfg;
 	struct sdhci_host *host = &prv->host;
 	struct clk clk;
 	int ret;

 	host->max_clk = cfg->f_max;
 	ret = clk_get_by_index(dev, 0, &clk);
 	if (!ret) {
 		ret = clk_set_rate(&clk, host->max_clk);
 		if (IS_ERR_VALUE(ret))
 			printf("%s clk set rate fail!\n", __func__);
 	} else {
 		printf("%s fail to get clk\n", __func__);
 	}

 	prv->emmc_clk = clk;
 	prv->dev = dev;

 	if (data->get_phy) {
 		ret = data->get_phy(dev);
 		if (ret)
 			return ret;
 	}

 	if (data->emmc_phy_init) {
 		ret = data->emmc_phy_init(dev);
 		if (ret)
 			return ret;
 	}

 	host->ops = &rockchip_sdhci_ops;
 	host->quirks = SDHCI_QUIRK_WAIT_SEND_CMD;

 	host->mmc = &plat->mmc;
 	host->mmc->priv = &prv->host;
 	host->mmc->dev = dev;
 	upriv->mmc = host->mmc;

 	ret = sdhci_setup_cfg(cfg, host, cfg->f_max, EMMC_MIN_FREQ);
 	if (ret)
 		return ret;

 	return sdhci_probe(dev);
 }

 static int rockchip_sdhci_of_to_plat(struct udevice *dev)
 {
 	struct rockchip_sdhc_plat *plat = dev_get_plat(dev);
 	struct sdhci_host *host = dev_get_priv(dev);
 	struct mmc_config *cfg = &plat->cfg;
 	int ret;

 	host->name = dev->name;
 	host->ioaddr = dev_read_addr_ptr(dev);

 	ret = mmc_of_parse(dev, cfg);
 	if (ret)
 		return ret;

 	return 0;
 }

 static int rockchip_sdhci_bind(struct udevice *dev)
 {
 	struct rockchip_sdhc_plat *plat = dev_get_plat(dev);

 	return sdhci_bind(dev, &plat->mmc, &plat->cfg);
 }

 static const struct sdhci_data rk3399_data = {
 	.emmc_set_clock = rk3399_sdhci_emmc_set_clock,
 	.get_phy = rk3399_emmc_get_phy,
 	.emmc_phy_init = rk3399_emmc_phy_init,
 };

 static const struct sdhci_data rk3568_data = {
 	.emmc_set_clock = rk3568_sdhci_emmc_set_clock,
 	.get_phy = rk3568_emmc_get_phy,
 	.emmc_phy_init = rk3568_emmc_phy_init,
 };

 static const struct udevice_id sdhci_ids[] = {
 	{
 		.compatible = "arasan,sdhci-5.1",
 		.data = (ulong)&rk3399_data,
 	},
 	{
 		.compatible = "rockchip,rk3568-dwcmshc",
 		.data = (ulong)&rk3568_data,
 	},
 	{ }
 };

 U_BOOT_DRIVER(arasan_sdhci_drv) = {
 	.name		= "rockchip_sdhci_5_1",
 	.id		= UCLASS_MMC,
 	.of_match	= sdhci_ids,
 	.of_to_plat	= rockchip_sdhci_of_to_plat,
 	.ops		= &sdhci_ops,
 	.bind		= rockchip_sdhci_bind,
 	.probe		= rockchip_sdhci_probe,
 	.priv_auto	= sizeof(struct rockchip_sdhc),
 	.plat_auto	= sizeof(struct rockchip_sdhc_plat),
 };
	// SPDX-License-Identifier: GPL-2.0+
	/*
	* (C) Copyright 2016 Fuzhou Rockchip Electronics Co., Ltd
	*
	* Rockchip SD Host Controller Interface
	*/

	#include <common.h>
	#include <clk.h>
	#include <dm.h>
	#include <dm/ofnode.h>
	#include <dt-structs.h>
	#include <linux/delay.h>
	#include <linux/err.h>
	#include <linux/libfdt.h>
	#include <linux/iopoll.h>
	#include <malloc.h>
	#include <mapmem.h>
	#include "mmc_private.h"
	#include <sdhci.h>
	#include <syscon.h>
	#include <asm/arch-rockchip/clock.h>
	#include <asm/arch-rockchip/hardware.h>

	/* 400KHz is max freq for card ID etc. Use that as min */
	#define EMMC_MIN_FREQ 400000
	#define KHz (1000)
	#define MHz (1000 * KHz)
	#define SDHCI_TUNING_LOOP_COUNT 40

	#define PHYCTRL_CALDONE_MASK 0x1
	#define PHYCTRL_CALDONE_SHIFT 0x6
	#define PHYCTRL_CALDONE_DONE 0x1
	#define PHYCTRL_DLLRDY_MASK 0x1
	#define PHYCTRL_DLLRDY_SHIFT 0x5
	#define PHYCTRL_DLLRDY_DONE 0x1
	#define PHYCTRL_FREQSEL_200M 0x0
	#define PHYCTRL_FREQSEL_50M 0x1
	#define PHYCTRL_FREQSEL_100M 0x2
	#define PHYCTRL_FREQSEL_150M 0x3
	#define PHYCTRL_DLL_LOCK_WO_TMOUT(x) \
	((((x) >> PHYCTRL_DLLRDY_SHIFT) & PHYCTRL_DLLRDY_MASK) ==\
	PHYCTRL_DLLRDY_DONE)

	/* Rockchip specific Registers */
	#define DWCMSHC_EMMC_DLL_CTRL 0x800
	#define DWCMSHC_EMMC_DLL_CTRL_RESET BIT(1)
	#define DWCMSHC_EMMC_DLL_RXCLK 0x804
	#define DWCMSHC_EMMC_DLL_TXCLK 0x808
	#define DWCMSHC_EMMC_DLL_STRBIN 0x80c
	#define DWCMSHC_EMMC_DLL_STATUS0 0x840
	#define DWCMSHC_EMMC_DLL_STATUS1 0x844
	#define DWCMSHC_EMMC_DLL_START BIT(0)
	#define DWCMSHC_EMMC_DLL_RXCLK_SRCSEL 29
	#define DWCMSHC_EMMC_DLL_START_POINT 16
	#define DWCMSHC_EMMC_DLL_START_DEFAULT 5
	#define DWCMSHC_EMMC_DLL_INC_VALUE 2
	#define DWCMSHC_EMMC_DLL_INC 8
	#define DWCMSHC_EMMC_DLL_DLYENA BIT(27)
	#define DLL_TXCLK_TAPNUM_DEFAULT 0x10
	#define DLL_STRBIN_TAPNUM_DEFAULT 0x3
	#define DLL_TXCLK_TAPNUM_FROM_SW BIT(24)
	#define DWCMSHC_EMMC_DLL_LOCKED BIT(8)
	#define DWCMSHC_EMMC_DLL_TIMEOUT BIT(9)
	#define DLL_RXCLK_NO_INVERTER 1
	#define DLL_RXCLK_INVERTER 0
	#define DWCMSHC_ENHANCED_STROBE BIT(8)
	#define DLL_LOCK_WO_TMOUT(x) \
	((((x) & DWCMSHC_EMMC_DLL_LOCKED) == DWCMSHC_EMMC_DLL_LOCKED) && \
	(((x) & DWCMSHC_EMMC_DLL_TIMEOUT) == 0))
	#define ROCKCHIP_MAX_CLKS 3

	struct rockchip_sdhc_plat {
	struct mmc_config cfg;
	struct mmc mmc;
	};

	struct rockchip_emmc_phy {
	u32 emmcphy_con[7];
	u32 reserved;
	u32 emmcphy_status;
	};

	struct rockchip_sdhc {
	struct sdhci_host host;
	struct udevice *dev;
	void *base;
	struct rockchip_emmc_phy *phy;
	struct clk emmc_clk;
	};

	struct sdhci_data {
	int (emmc_set_clock)(struct sdhci_host host, unsigned int clock);
	int (emmc_phy_init)(struct udevice dev);
	int (get_phy)(struct udevice dev);
	};

	static int rk3399_emmc_phy_init(struct udevice *dev)
	{
	return 0;
	}

	static void rk3399_emmc_phy_power_on(struct rockchip_emmc_phy *phy, u32 clock)
	{
	u32 caldone, dllrdy, freqsel;

	writel(RK_CLRSETBITS(7 << 4, 0), &phy->emmcphy_con[6]);
	writel(RK_CLRSETBITS(1 << 11, 1 << 11), &phy->emmcphy_con[0]);
	writel(RK_CLRSETBITS(0xf << 7, 6 << 7), &phy->emmcphy_con[0]);

	/*
	* According to the user manual, calpad calibration
	* cycle takes more than 2us without the minimal recommended
	* value, so we may need a little margin here
	*/
	udelay(3);
	writel(RK_CLRSETBITS(1, 1), &phy->emmcphy_con[6]);

	/*
	* According to the user manual, it asks driver to
	* wait 5us for calpad busy trimming. But it seems that
	* 5us of caldone isn't enough for all cases.
	*/
	udelay(500);
	caldone = readl(&phy->emmcphy_status);
	caldone = (caldone >> PHYCTRL_CALDONE_SHIFT) & PHYCTRL_CALDONE_MASK;
	if (caldone != PHYCTRL_CALDONE_DONE) {
	printf("%s: caldone timeout.\n", __func__);
	return;
	}

	/* Set the frequency of the DLL operation */
	if (clock < 75 * MHz)
	freqsel = PHYCTRL_FREQSEL_50M;
	else if (clock < 125 * MHz)
	freqsel = PHYCTRL_FREQSEL_100M;
	else if (clock < 175 * MHz)
	freqsel = PHYCTRL_FREQSEL_150M;
	else
	freqsel = PHYCTRL_FREQSEL_200M;

	/* Set the frequency of the DLL operation */
	writel(RK_CLRSETBITS(3 << 12, freqsel << 12), &phy->emmcphy_con[0]);
	writel(RK_CLRSETBITS(1 << 1, 1 << 1), &phy->emmcphy_con[6]);

	/* REN Enable on STRB Line for HS400 */
	writel(RK_CLRSETBITS(0, 1 << 9), &phy->emmcphy_con[2]);

	read_poll_timeout(readl, &phy->emmcphy_status, dllrdy,
	PHYCTRL_DLL_LOCK_WO_TMOUT(dllrdy), 1, 5000);
	}

	static void rk3399_emmc_phy_power_off(struct rockchip_emmc_phy *phy)
	{
	writel(RK_CLRSETBITS(1, 0), &phy->emmcphy_con[6]);
	writel(RK_CLRSETBITS(1 << 1, 0), &phy->emmcphy_con[6]);
	}

	static int rk3399_emmc_get_phy(struct udevice *dev)
	{
	struct rockchip_sdhc *priv = dev_get_priv(dev);
	ofnode phy_node;
	void *grf_base;
	u32 grf_phy_offset, phandle;

	phandle = dev_read_u32_default(dev, "phys", 0);
	phy_node = ofnode_get_by_phandle(phandle);
	if (!ofnode_valid(phy_node)) {
	debug("Not found emmc phy device\n");
	return -ENODEV;
	}

	grf_base = syscon_get_first_range(ROCKCHIP_SYSCON_GRF);
	if (grf_base < 0) {
	printf("%s Get syscon grf failed", __func__);
	return -ENODEV;
	}
	grf_phy_offset = ofnode_read_u32_default(phy_node, "reg", 0);

	priv->phy = (struct rockchip_emmc_phy *)(grf_base + grf_phy_offset);

	return 0;
	}

	static int rk3399_sdhci_emmc_set_clock(struct sdhci_host *host, unsigned int clock)
	{
	struct rockchip_sdhc *priv = container_of(host, struct rockchip_sdhc, host);
	int cycle_phy = host->clock != clock && clock > EMMC_MIN_FREQ;

	if (cycle_phy)
	rk3399_emmc_phy_power_off(priv->phy);

	sdhci_set_clock(host->mmc, clock);

	if (cycle_phy)
	rk3399_emmc_phy_power_on(priv->phy, clock);

	return 0;
	}

	static int rk3568_emmc_phy_init(struct udevice *dev)
	{
	struct rockchip_sdhc *prv = dev_get_priv(dev);
	struct sdhci_host *host = &prv->host;
	u32 extra;

	extra = DLL_RXCLK_NO_INVERTER << DWCMSHC_EMMC_DLL_RXCLK_SRCSEL;
	sdhci_writel(host, extra, DWCMSHC_EMMC_DLL_RXCLK);

	return 0;
	}

	static int rk3568_sdhci_emmc_set_clock(struct sdhci_host *host, unsigned int clock)
	{
	struct rockchip_sdhc *priv = container_of(host, struct rockchip_sdhc, host);
	int val, ret;
	u32 extra;

	if (clock > host->max_clk)
	clock = host->max_clk;
	if (clock)
	clk_set_rate(&priv->emmc_clk, clock);

	sdhci_set_clock(host->mmc, clock);

	if (clock >= 100 * MHz) {
	/* reset DLL */
	sdhci_writel(host, DWCMSHC_EMMC_DLL_CTRL_RESET, DWCMSHC_EMMC_DLL_CTRL);
	udelay(1);
	sdhci_writel(host, 0, DWCMSHC_EMMC_DLL_CTRL);

	/* Init DLL settings */
	extra = DWCMSHC_EMMC_DLL_START_DEFAULT << DWCMSHC_EMMC_DLL_START_POINT \|
	DWCMSHC_EMMC_DLL_INC_VALUE << DWCMSHC_EMMC_DLL_INC \|
	DWCMSHC_EMMC_DLL_START;
	sdhci_writel(host, extra, DWCMSHC_EMMC_DLL_CTRL);

	ret = read_poll_timeout(readl, host->ioaddr + DWCMSHC_EMMC_DLL_STATUS0,
	val, DLL_LOCK_WO_TMOUT(val), 1, 500);
	if (ret)
	return ret;

	extra = DWCMSHC_EMMC_DLL_DLYENA \|
	DLL_RXCLK_NO_INVERTER << DWCMSHC_EMMC_DLL_RXCLK_SRCSEL;
	sdhci_writel(host, extra, DWCMSHC_EMMC_DLL_RXCLK);

	extra = DWCMSHC_EMMC_DLL_DLYENA \|
	DLL_TXCLK_TAPNUM_DEFAULT \|
	DLL_TXCLK_TAPNUM_FROM_SW;
	sdhci_writel(host, extra, DWCMSHC_EMMC_DLL_TXCLK);

	extra = DWCMSHC_EMMC_DLL_DLYENA \|
	DLL_STRBIN_TAPNUM_DEFAULT;
	sdhci_writel(host, extra, DWCMSHC_EMMC_DLL_STRBIN);
	} else {
	/* reset the clock phase when the frequency is lower than 100MHz */
	sdhci_writel(host, 0, DWCMSHC_EMMC_DLL_CTRL);
	extra = DLL_RXCLK_NO_INVERTER << DWCMSHC_EMMC_DLL_RXCLK_SRCSEL;
	sdhci_writel(host, extra, DWCMSHC_EMMC_DLL_RXCLK);
	sdhci_writel(host, 0, DWCMSHC_EMMC_DLL_TXCLK);
	sdhci_writel(host, 0, DWCMSHC_EMMC_DLL_STRBIN);
	}

	return 0;
	}

	static int rk3568_emmc_get_phy(struct udevice *dev)
	{
	return 0;
	}

	static int rockchip_sdhci_set_ios_post(struct sdhci_host *host)
	{
	struct rockchip_sdhc *priv = container_of(host, struct rockchip_sdhc, host);
	struct sdhci_data data = (struct sdhci_data )dev_get_driver_data(priv->dev);
	struct mmc *mmc = host->mmc;
	uint clock = mmc->tran_speed;
	u32 reg;

	if (!clock)
	clock = mmc->clock;

	if (data->emmc_set_clock)
	data->emmc_set_clock(host, clock);

	if (mmc->selected_mode == MMC_HS_400 \|\| mmc->selected_mode == MMC_HS_400_ES) {
	reg = sdhci_readw(host, SDHCI_HOST_CONTROL2);
	reg &= ~SDHCI_CTRL_UHS_MASK;
	reg \|= SDHCI_CTRL_HS400;
	sdhci_writew(host, reg, SDHCI_HOST_CONTROL2);
	} else {
	sdhci_set_uhs_timing(host);
	}

	return 0;
	}

	static int rockchip_sdhci_execute_tuning(struct mmc *mmc, u8 opcode)
	{
	struct sdhci_host *host = dev_get_priv(mmc->dev);
	char tuning_loop_counter = SDHCI_TUNING_LOOP_COUNT;
	struct mmc_cmd cmd;
	u32 ctrl, blk_size;
	int ret = 0;

	ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
	ctrl \|= SDHCI_CTRL_EXEC_TUNING;
	sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2);

	sdhci_writel(host, SDHCI_INT_DATA_AVAIL, SDHCI_INT_ENABLE);
	sdhci_writel(host, SDHCI_INT_DATA_AVAIL, SDHCI_SIGNAL_ENABLE);

	blk_size = SDHCI_MAKE_BLKSZ(SDHCI_DEFAULT_BOUNDARY_ARG, 64);
	if (opcode == MMC_CMD_SEND_TUNING_BLOCK_HS200 && host->mmc->bus_width == 8)
	blk_size = SDHCI_MAKE_BLKSZ(SDHCI_DEFAULT_BOUNDARY_ARG, 128);
	sdhci_writew(host, blk_size, SDHCI_BLOCK_SIZE);
	sdhci_writew(host, SDHCI_TRNS_READ, SDHCI_TRANSFER_MODE);

	cmd.cmdidx = opcode;
	cmd.resp_type = MMC_RSP_R1;
	cmd.cmdarg = 0;

	do {
	if (tuning_loop_counter-- == 0)
	break;

	mmc_send_cmd(mmc, &cmd, NULL);

	if (opcode == MMC_CMD_SEND_TUNING_BLOCK)
	/*
	* For tuning command, do not do busy loop. As tuning
	* is happening (CLK-DATA latching for setup/hold time
	* requirements), give time to complete
	*/
	udelay(1);

	ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
	} while (ctrl & SDHCI_CTRL_EXEC_TUNING);

	if (!(ctrl & SDHCI_CTRL_TUNED_CLK)) {
	printf("%s:Tuning failed\n", __func__);
	ret = -EIO;
	}

	if (tuning_loop_counter < 0) {
	ctrl &= ~SDHCI_CTRL_TUNED_CLK;
	sdhci_writel(host, ctrl, SDHCI_HOST_CONTROL2);
	}

	/* Enable only interrupts served by the SD controller */
	sdhci_writel(host, SDHCI_INT_DATA_MASK \| SDHCI_INT_CMD_MASK, SDHCI_INT_ENABLE);
	/* Mask all sdhci interrupt sources */
	sdhci_writel(host, 0x0, SDHCI_SIGNAL_ENABLE);

	return ret;
	}

	static struct sdhci_ops rockchip_sdhci_ops = {
	.set_ios_post = rockchip_sdhci_set_ios_post,
	.platform_execute_tuning = &rockchip_sdhci_execute_tuning,
	};

	static int rockchip_sdhci_probe(struct udevice *dev)
	{
	struct sdhci_data data = (struct sdhci_data )dev_get_driver_data(dev);
	struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
	struct rockchip_sdhc_plat *plat = dev_get_plat(dev);
	struct rockchip_sdhc *prv = dev_get_priv(dev);
	struct mmc_config *cfg = &plat->cfg;
	struct sdhci_host *host = &prv->host;
	struct clk clk;
	int ret;

	host->max_clk = cfg->f_max;
	ret = clk_get_by_index(dev, 0, &clk);
	if (!ret) {
	ret = clk_set_rate(&clk, host->max_clk);
	if (IS_ERR_VALUE(ret))
	printf("%s clk set rate fail!\n", __func__);
	} else {
	printf("%s fail to get clk\n", __func__);
	}

	prv->emmc_clk = clk;
	prv->dev = dev;

	if (data->get_phy) {
	ret = data->get_phy(dev);
	if (ret)
	return ret;
	}

	if (data->emmc_phy_init) {
	ret = data->emmc_phy_init(dev);
	if (ret)
	return ret;
	}

	host->ops = &rockchip_sdhci_ops;
	host->quirks = SDHCI_QUIRK_WAIT_SEND_CMD;

	host->mmc = &plat->mmc;
	host->mmc->priv = &prv->host;
	host->mmc->dev = dev;
	upriv->mmc = host->mmc;

	ret = sdhci_setup_cfg(cfg, host, cfg->f_max, EMMC_MIN_FREQ);
	if (ret)
	return ret;

	return sdhci_probe(dev);
	}

	static int rockchip_sdhci_of_to_plat(struct udevice *dev)
	{
	struct rockchip_sdhc_plat *plat = dev_get_plat(dev);
	struct sdhci_host *host = dev_get_priv(dev);
	struct mmc_config *cfg = &plat->cfg;
	int ret;

	host->name = dev->name;
	host->ioaddr = dev_read_addr_ptr(dev);

	ret = mmc_of_parse(dev, cfg);
	if (ret)
	return ret;

	return 0;
	}

	static int rockchip_sdhci_bind(struct udevice *dev)
	{
	struct rockchip_sdhc_plat *plat = dev_get_plat(dev);

	return sdhci_bind(dev, &plat->mmc, &plat->cfg);
	}

	static const struct sdhci_data rk3399_data = {
	.emmc_set_clock = rk3399_sdhci_emmc_set_clock,
	.get_phy = rk3399_emmc_get_phy,
	.emmc_phy_init = rk3399_emmc_phy_init,
	};

	static const struct sdhci_data rk3568_data = {
	.emmc_set_clock = rk3568_sdhci_emmc_set_clock,
	.get_phy = rk3568_emmc_get_phy,
	.emmc_phy_init = rk3568_emmc_phy_init,
	};

	static const struct udevice_id sdhci_ids[] = {
	{
	.compatible = "arasan,sdhci-5.1",
	.data = (ulong)&rk3399_data,
	},
	{
	.compatible = "rockchip,rk3568-dwcmshc",
	.data = (ulong)&rk3568_data,
	},
	{ }
	};

	U_BOOT_DRIVER(arasan_sdhci_drv) = {
	.name = "rockchip_sdhci_5_1",
	.id = UCLASS_MMC,
	.of_match = sdhci_ids,
	.of_to_plat = rockchip_sdhci_of_to_plat,
	.ops = &sdhci_ops,
	.bind = rockchip_sdhci_bind,
	.probe = rockchip_sdhci_probe,
	.priv_auto = sizeof(struct rockchip_sdhc),
	.plat_auto = sizeof(struct rockchip_sdhc_plat),
	};