drivers/mmc/xenon_sdhci.c - filogic/uboot - Gitiles

 // SPDX-License-Identifier: GPL-2.0
 /*
  * Driver for Marvell SOC Platform Group Xenon SDHC as a platform device
  *
  * Copyright (C) 2016 Marvell, All Rights Reserved.
  *
  * Author:	Victor Gu <xigu@marvell.com>
  * Date:	2016-8-24
  *
  * Included parts of the Linux driver version which was written by:
  * Hu Ziji <huziji@marvell.com>
  *
  * Ported to from Marvell 2015.01 to mainline U-Boot 2017.01:
  * Stefan Roese <sr@denx.de>
  */

 #include <common.h>
 #include <dm.h>
 #include <fdtdec.h>
 #include <linux/bitops.h>
 #include <linux/delay.h>
 #include <linux/libfdt.h>
 #include <malloc.h>
 #include <sdhci.h>
 #include <power/regulator.h>

 DECLARE_GLOBAL_DATA_PTR;

 /* Register Offset of SD Host Controller SOCP self-defined register */
 #define SDHC_SYS_CFG_INFO			0x0104
 #define SLOT_TYPE_SDIO_SHIFT			24
 #define SLOT_TYPE_EMMC_MASK			0xFF
 #define SLOT_TYPE_EMMC_SHIFT			16
 #define SLOT_TYPE_SD_SDIO_MMC_MASK		0xFF
 #define SLOT_TYPE_SD_SDIO_MMC_SHIFT		8
 #define NR_SUPPORTED_SLOT_MASK			0x7

 #define SDHC_SYS_OP_CTRL			0x0108
 #define AUTO_CLKGATE_DISABLE_MASK		BIT(20)
 #define SDCLK_IDLEOFF_ENABLE_SHIFT		8
 #define SLOT_ENABLE_SHIFT			0

 #define SDHC_SYS_EXT_OP_CTRL			0x010C
 #define MASK_CMD_CONFLICT_ERROR			BIT(8)

 #define SDHC_SLOT_EMMC_CTRL			0x0130
 #define ENABLE_DATA_STROBE_SHIFT		24
 #define SET_EMMC_RSTN_SHIFT			16
 #define EMMC_VCCQ_MASK				0x3
 #define EMMC_VCCQ_1_8V				0x1
 #define EMMC_VCCQ_1_2V				0x2
 #define	EMMC_VCCQ_3_3V				0x3

 #define SDHC_SLOT_RETUNING_REQ_CTRL		0x0144
 /* retuning compatible */
 #define RETUNING_COMPATIBLE			0x1

 /* Xenon specific Mode Select value */
 #define XENON_SDHCI_CTRL_HS200			0x5
 #define XENON_SDHCI_CTRL_HS400			0x6

 #define EMMC_PHY_REG_BASE			0x170
 #define EMMC_PHY_TIMING_ADJUST			EMMC_PHY_REG_BASE
 #define OUTPUT_QSN_PHASE_SELECT			BIT(17)
 #define SAMPL_INV_QSP_PHASE_SELECT		BIT(18)
 #define SAMPL_INV_QSP_PHASE_SELECT_SHIFT	18
 #define EMMC_PHY_SLOW_MODE			BIT(29)
 #define PHY_INITIALIZAION			BIT(31)
 #define WAIT_CYCLE_BEFORE_USING_MASK		0xf
 #define WAIT_CYCLE_BEFORE_USING_SHIFT		12
 #define FC_SYNC_EN_DURATION_MASK		0xf
 #define FC_SYNC_EN_DURATION_SHIFT		8
 #define FC_SYNC_RST_EN_DURATION_MASK		0xf
 #define FC_SYNC_RST_EN_DURATION_SHIFT		4
 #define FC_SYNC_RST_DURATION_MASK		0xf
 #define FC_SYNC_RST_DURATION_SHIFT		0

 #define EMMC_PHY_FUNC_CONTROL			(EMMC_PHY_REG_BASE + 0x4)
 #define DQ_ASYNC_MODE				BIT(4)
 #define DQ_DDR_MODE_SHIFT			8
 #define DQ_DDR_MODE_MASK			0xff
 #define CMD_DDR_MODE				BIT(16)

 #define EMMC_PHY_PAD_CONTROL			(EMMC_PHY_REG_BASE + 0x8)
 #define REC_EN_SHIFT				24
 #define REC_EN_MASK				0xf
 #define FC_DQ_RECEN				BIT(24)
 #define FC_CMD_RECEN				BIT(25)
 #define FC_QSP_RECEN				BIT(26)
 #define FC_QSN_RECEN				BIT(27)
 #define OEN_QSN					BIT(28)
 #define AUTO_RECEN_CTRL				BIT(30)

 #define EMMC_PHY_PAD_CONTROL1			(EMMC_PHY_REG_BASE + 0xc)
 #define EMMC5_1_FC_QSP_PD			BIT(9)
 #define EMMC5_1_FC_QSP_PU			BIT(25)
 #define EMMC5_1_FC_CMD_PD			BIT(8)
 #define EMMC5_1_FC_CMD_PU			BIT(24)
 #define EMMC5_1_FC_DQ_PD			0xff
 #define EMMC5_1_FC_DQ_PU			(0xff << 16)

 #define SDHCI_RETUNE_EVT_INTSIG			0x00001000

 /* Hyperion only have one slot 0 */
 #define XENON_MMC_SLOT_ID_HYPERION		0

 #define MMC_TIMING_LEGACY	0
 #define MMC_TIMING_MMC_HS	1
 #define MMC_TIMING_SD_HS	2
 #define MMC_TIMING_UHS_SDR12	3
 #define MMC_TIMING_UHS_SDR25	4
 #define MMC_TIMING_UHS_SDR50	5
 #define MMC_TIMING_UHS_SDR104	6
 #define MMC_TIMING_UHS_DDR50	7
 #define MMC_TIMING_MMC_DDR52	8
 #define MMC_TIMING_MMC_HS200	9
 #define MMC_TIMING_MMC_HS400	10

 #define XENON_MMC_MAX_CLK	400000000
 #define XENON_MMC_3V3_UV	3300000
 #define XENON_MMC_1V8_UV	1800000

 enum soc_pad_ctrl_type {
 	SOC_PAD_SD,
 	SOC_PAD_FIXED_1_8V,
 };

 struct xenon_sdhci_plat {
 	struct mmc_config cfg;
 	struct mmc mmc;
 };

 struct xenon_sdhci_priv {
 	struct sdhci_host host;

 	u8 timing;

 	unsigned int clock;

 	void *pad_ctrl_reg;
 	int pad_type;

 	struct udevice *vqmmc;
 };

 static int xenon_mmc_phy_init(struct sdhci_host *host)
 {
 	struct xenon_sdhci_priv *priv = host->mmc->priv;
 	u32 clock = priv->clock;
 	u32 time;
 	u32 var;

 	/* Enable QSP PHASE SELECT */
 	var = sdhci_readl(host, EMMC_PHY_TIMING_ADJUST);
 	var |= SAMPL_INV_QSP_PHASE_SELECT;
 	if ((priv->timing == MMC_TIMING_UHS_SDR50) ||
 	    (priv->timing == MMC_TIMING_UHS_SDR25) ||
 	    (priv->timing == MMC_TIMING_UHS_SDR12) ||
 	    (priv->timing == MMC_TIMING_SD_HS) ||
 	    (priv->timing == MMC_TIMING_LEGACY))
 		var |= EMMC_PHY_SLOW_MODE;
 	sdhci_writel(host, var, EMMC_PHY_TIMING_ADJUST);

 	/* Poll for host MMC PHY clock init to be stable */
 	/* Wait up to 10ms */
 	time = 100;
 	while (time--) {
 		var = sdhci_readl(host, SDHCI_CLOCK_CONTROL);
 		if (var & SDHCI_CLOCK_INT_STABLE)
 			break;

 		udelay(100);
 	}

 	if (time <= 0) {
 		pr_err("Failed to enable MMC internal clock in time\n");
 		return -ETIMEDOUT;
 	}

 	/* Init PHY */
 	var = sdhci_readl(host, EMMC_PHY_TIMING_ADJUST);
 	var |= PHY_INITIALIZAION;
 	sdhci_writel(host, var, EMMC_PHY_TIMING_ADJUST);

 	if (clock == 0) {
 		/* Use the possibly slowest bus frequency value */
 		clock = 100000;
 	}

 	/* Poll for host eMMC PHY init to complete */
 	/* Wait up to 10ms */
 	time = 100;
 	while (time--) {
 		var = sdhci_readl(host, EMMC_PHY_TIMING_ADJUST);
 		var &= PHY_INITIALIZAION;
 		if (!var)
 			break;

 		/* wait for host eMMC PHY init to complete */
 		udelay(100);
 	}

 	if (time <= 0) {
 		pr_err("Failed to init MMC PHY in time\n");
 		return -ETIMEDOUT;
 	}

 	return 0;
 }

 #define ARMADA_3700_SOC_PAD_1_8V	0x1
 #define ARMADA_3700_SOC_PAD_3_3V	0x0

 static void armada_3700_soc_pad_voltage_set(struct sdhci_host *host)
 {
 	struct xenon_sdhci_priv *priv = host->mmc->priv;

 	if (priv->pad_type == SOC_PAD_FIXED_1_8V)
 		writel(ARMADA_3700_SOC_PAD_1_8V, priv->pad_ctrl_reg);
 	else if (priv->pad_type == SOC_PAD_SD)
 		writel(ARMADA_3700_SOC_PAD_3_3V, priv->pad_ctrl_reg);
 }

 static int xenon_mmc_start_signal_voltage_switch(struct sdhci_host *host)
 {
 	struct xenon_sdhci_priv *priv = host->mmc->priv;
 	u8 voltage;
 	u32 ctrl;
 	int ret = 0;

 	/* If there is no vqmmc regulator, return */
 	if (!priv->vqmmc)
 		return 0;

 	if (priv->pad_type == SOC_PAD_FIXED_1_8V) {
 		/* Switch to 1.8v */
 		ret = regulator_set_value(priv->vqmmc,
 					  XENON_MMC_1V8_UV);
 	} else if (priv->pad_type == SOC_PAD_SD) {
 		/* Get voltage info */
 		voltage = sdhci_readb(host, SDHCI_POWER_CONTROL);
 		voltage &= ~SDHCI_POWER_ON;

 		if (voltage == SDHCI_POWER_330) {
 			/* Switch to 3.3v */
 			ret = regulator_set_value(priv->vqmmc,
 						  XENON_MMC_3V3_UV);
 		} else {
 			/* Switch to 1.8v */
 			ret = regulator_set_value(priv->vqmmc,
 						  XENON_MMC_1V8_UV);
 		}
 	}

 	/* Set VCCQ, eMMC mode: 1.8V; SD/SDIO mode: 3.3V */
 	ctrl = sdhci_readl(host, SDHC_SLOT_EMMC_CTRL);
 	if (IS_SD(host->mmc))
 		ctrl |= EMMC_VCCQ_3_3V;
 	else
 		ctrl |= EMMC_VCCQ_1_8V;
 	sdhci_writel(host, ctrl, SDHC_SLOT_EMMC_CTRL);

 	if (ret)
 		printf("Signal voltage switch fail\n");

 	return ret;
 }

 static void xenon_mmc_phy_set(struct sdhci_host *host)
 {
 	struct xenon_sdhci_priv *priv = host->mmc->priv;
 	u32 var;

 	/* Setup pad, set bit[30], bit[28] and bits[26:24] */
 	var = sdhci_readl(host, EMMC_PHY_PAD_CONTROL);
 	var |= AUTO_RECEN_CTRL | OEN_QSN | FC_QSP_RECEN |
 		FC_CMD_RECEN | FC_DQ_RECEN;
 	sdhci_writel(host, var, EMMC_PHY_PAD_CONTROL);

 	/* Set CMD and DQ Pull Up */
 	var = sdhci_readl(host, EMMC_PHY_PAD_CONTROL1);
 	var |= (EMMC5_1_FC_CMD_PU | EMMC5_1_FC_DQ_PU);
 	var &= ~(EMMC5_1_FC_CMD_PD | EMMC5_1_FC_DQ_PD);
 	sdhci_writel(host, var, EMMC_PHY_PAD_CONTROL1);

 	/*
 	 * If timing belongs to high speed, set bit[17] of
 	 * EMMC_PHY_TIMING_ADJUST register
 	 */
 	if ((priv->timing == MMC_TIMING_MMC_HS400) ||
 	    (priv->timing == MMC_TIMING_MMC_HS200) ||
 	    (priv->timing == MMC_TIMING_UHS_SDR50) ||
 	    (priv->timing == MMC_TIMING_UHS_SDR104) ||
 	    (priv->timing == MMC_TIMING_UHS_DDR50) ||
 	    (priv->timing == MMC_TIMING_UHS_SDR25) ||
 	    (priv->timing == MMC_TIMING_MMC_DDR52)) {
 		var = sdhci_readl(host, EMMC_PHY_TIMING_ADJUST);
 		var |= OUTPUT_QSN_PHASE_SELECT;
 		sdhci_writel(host, var, EMMC_PHY_TIMING_ADJUST);
 	}

 	/*
 	 * When setting EMMC_PHY_FUNC_CONTROL register,
 	 * SD clock should be disabled
 	 */
 	var = sdhci_readl(host, SDHCI_CLOCK_CONTROL);
 	var &= ~SDHCI_CLOCK_CARD_EN;
 	sdhci_writew(host, var, SDHCI_CLOCK_CONTROL);

 	var = sdhci_readl(host, EMMC_PHY_FUNC_CONTROL);
 	if (host->mmc->ddr_mode) {
 		var |= (DQ_DDR_MODE_MASK << DQ_DDR_MODE_SHIFT) | CMD_DDR_MODE;
 	} else {
 		var &= ~((DQ_DDR_MODE_MASK << DQ_DDR_MODE_SHIFT) |
 			 CMD_DDR_MODE);
 	}
 	sdhci_writel(host, var, EMMC_PHY_FUNC_CONTROL);

 	/* Enable bus clock */
 	var = sdhci_readl(host, SDHCI_CLOCK_CONTROL);
 	var |= SDHCI_CLOCK_CARD_EN;
 	sdhci_writew(host, var, SDHCI_CLOCK_CONTROL);

 	xenon_mmc_phy_init(host);
 }

 /* Enable/Disable the Auto Clock Gating function of this slot */
 static void xenon_mmc_set_acg(struct sdhci_host *host, bool enable)
 {
 	u32 var;

 	var = sdhci_readl(host, SDHC_SYS_OP_CTRL);
 	if (enable)
 		var &= ~AUTO_CLKGATE_DISABLE_MASK;
 	else
 		var |= AUTO_CLKGATE_DISABLE_MASK;

 	sdhci_writel(host, var, SDHC_SYS_OP_CTRL);
 }

 #define SLOT_MASK(slot)		BIT(slot)

 /* Enable specific slot */
 static void xenon_mmc_enable_slot(struct sdhci_host *host, u8 slot)
 {
 	u32 var;

 	var = sdhci_readl(host, SDHC_SYS_OP_CTRL);
 	var |= SLOT_MASK(slot) << SLOT_ENABLE_SHIFT;
 	sdhci_writel(host, var, SDHC_SYS_OP_CTRL);
 }

 /* Enable Parallel Transfer Mode */
 static void xenon_mmc_enable_parallel_tran(struct sdhci_host *host, u8 slot)
 {
 	u32 var;

 	var = sdhci_readl(host, SDHC_SYS_EXT_OP_CTRL);
 	var |= SLOT_MASK(slot);
 	sdhci_writel(host, var, SDHC_SYS_EXT_OP_CTRL);
 }

 static void xenon_mmc_disable_tuning(struct sdhci_host *host, u8 slot)
 {
 	u32 var;

 	/* Clear the Re-Tuning Request functionality */
 	var = sdhci_readl(host, SDHC_SLOT_RETUNING_REQ_CTRL);
 	var &= ~RETUNING_COMPATIBLE;
 	sdhci_writel(host, var, SDHC_SLOT_RETUNING_REQ_CTRL);

 	/* Clear the Re-tuning Event Signal Enable */
 	var = sdhci_readl(host, SDHCI_SIGNAL_ENABLE);
 	var &= ~SDHCI_RETUNE_EVT_INTSIG;
 	sdhci_writel(host, var, SDHCI_SIGNAL_ENABLE);
 }

 /* Mask command conflict error */
 static void xenon_mask_cmd_conflict_err(struct sdhci_host *host)
 {
 	u32  reg;

 	reg = sdhci_readl(host, SDHC_SYS_EXT_OP_CTRL);
 	reg |= MASK_CMD_CONFLICT_ERROR;
 	sdhci_writel(host, reg, SDHC_SYS_EXT_OP_CTRL);
 }

 /* Platform specific function for post set_ios configuration */
 static int xenon_sdhci_set_ios_post(struct sdhci_host *host)
 {
 	struct xenon_sdhci_priv *priv = host->mmc->priv;
 	uint speed = host->mmc->tran_speed;
 	int pwr_18v = 0;

 	/*
 	 * Signal Voltage Switching is only applicable for Host Controllers
 	 * v3.00 and above.
 	 */
 	if (SDHCI_GET_VERSION(host) >= SDHCI_SPEC_300)
 		xenon_mmc_start_signal_voltage_switch(host);

 	if ((sdhci_readb(host, SDHCI_POWER_CONTROL) & ~SDHCI_POWER_ON) ==
 	    SDHCI_POWER_180)
 		pwr_18v = 1;

 	/* Set timing variable according to the configured speed */
 	if (IS_SD(host->mmc)) {
 		/* SD/SDIO */
 		if (pwr_18v) {
 			if (host->mmc->ddr_mode)
 				priv->timing = MMC_TIMING_UHS_DDR50;
 			else if (speed <= 25000000)
 				priv->timing = MMC_TIMING_UHS_SDR25;
 			else
 				priv->timing = MMC_TIMING_UHS_SDR50;
 		} else {
 			if (speed <= 25000000)
 				priv->timing = MMC_TIMING_LEGACY;
 			else
 				priv->timing = MMC_TIMING_SD_HS;
 		}
 	} else {
 		/* eMMC */
 		if (host->mmc->ddr_mode)
 			priv->timing = MMC_TIMING_MMC_DDR52;
 		else if (speed <= 26000000)
 			priv->timing = MMC_TIMING_LEGACY;
 		else
 			priv->timing = MMC_TIMING_MMC_HS;
 	}

 	/* Re-init the PHY */
 	xenon_mmc_phy_set(host);

 	return 0;
 }

 /* Install a driver specific handler for post set_ios configuration */
 static const struct sdhci_ops xenon_sdhci_ops = {
 	.set_ios_post = xenon_sdhci_set_ios_post
 };

 static int xenon_sdhci_probe(struct udevice *dev)
 {
 	struct xenon_sdhci_plat *plat = dev_get_platdata(dev);
 	struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
 	struct xenon_sdhci_priv *priv = dev_get_priv(dev);
 	struct sdhci_host *host = dev_get_priv(dev);
 	int ret;

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

 	/* Set quirks */
 	host->quirks = SDHCI_QUIRK_WAIT_SEND_CMD | SDHCI_QUIRK_32BIT_DMA_ADDR;

 	/* Set default timing */
 	priv->timing = MMC_TIMING_LEGACY;

 	/* Get the vqmmc regulator if there is */
 	device_get_supply_regulator(dev, "vqmmc-supply", &priv->vqmmc);
 	/* Set the initial voltage value to 3.3V if there is regulator */
 	if (priv->vqmmc) {
 		ret = regulator_set_value(priv->vqmmc,
 					  XENON_MMC_3V3_UV);
 		if (ret) {
 			printf("Failed to set VQMMC regulator to 3.3V\n");
 			return ret;
 		}
 	}

 	/* Disable auto clock gating during init */
 	xenon_mmc_set_acg(host, false);

 	/* Enable slot */
 	xenon_mmc_enable_slot(host, XENON_MMC_SLOT_ID_HYPERION);

 	/*
 	 * Set default power on SoC PHY PAD register (currently only
 	 * available on the Armada 3700)
 	 */
 	if (priv->pad_ctrl_reg)
 		armada_3700_soc_pad_voltage_set(host);

 	host->host_caps = MMC_MODE_HS | MMC_MODE_HS_52MHz | MMC_MODE_DDR_52MHz;

 	ret = mmc_of_parse(dev, &plat->cfg);
 	if (ret)
 		return ret;

 	host->ops = &xenon_sdhci_ops;

 	host->max_clk = XENON_MMC_MAX_CLK;
 	ret = sdhci_setup_cfg(&plat->cfg, host, XENON_MMC_MAX_CLK, 0);
 	if (ret)
 		return ret;

 	ret = sdhci_probe(dev);
 	if (ret)
 		return ret;

 	/* Enable parallel transfer */
 	xenon_mmc_enable_parallel_tran(host, XENON_MMC_SLOT_ID_HYPERION);

 	/* Disable tuning functionality of this slot */
 	xenon_mmc_disable_tuning(host, XENON_MMC_SLOT_ID_HYPERION);

 	/* Enable auto clock gating after init */
 	xenon_mmc_set_acg(host, true);

 	xenon_mask_cmd_conflict_err(host);

 	return ret;
 }

 static int xenon_sdhci_ofdata_to_platdata(struct udevice *dev)
 {
 	struct sdhci_host *host = dev_get_priv(dev);
 	struct xenon_sdhci_priv *priv = dev_get_priv(dev);
 	const char *name;

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

 	if (device_is_compatible(dev, "marvell,armada-3700-sdhci"))
 		priv->pad_ctrl_reg = (void *)devfdt_get_addr_index(dev, 1);

 	name = fdt_getprop(gd->fdt_blob, dev_of_offset(dev), "marvell,pad-type",
 			   NULL);
 	if (name) {
 		if (0 == strncmp(name, "sd", 2)) {
 			priv->pad_type = SOC_PAD_SD;
 		} else if (0 == strncmp(name, "fixed-1-8v", 10)) {
 			priv->pad_type = SOC_PAD_FIXED_1_8V;
 		} else {
 			printf("Unsupported SOC PHY PAD ctrl type %s\n", name);
 			return -EINVAL;
 		}
 	}

 	return 0;
 }

 static int xenon_sdhci_bind(struct udevice *dev)
 {
 	struct xenon_sdhci_plat *plat = dev_get_platdata(dev);

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

 static const struct udevice_id xenon_sdhci_ids[] = {
 	{ .compatible = "marvell,armada-8k-sdhci",},
 	{ .compatible = "marvell,armada-3700-sdhci",},
 	{ }
 };

 U_BOOT_DRIVER(xenon_sdhci_drv) = {
 	.name		= "xenon_sdhci",
 	.id		= UCLASS_MMC,
 	.of_match	= xenon_sdhci_ids,
 	.ofdata_to_platdata = xenon_sdhci_ofdata_to_platdata,
 	.ops		= &sdhci_ops,
 	.bind		= xenon_sdhci_bind,
 	.probe		= xenon_sdhci_probe,
 	.priv_auto	= sizeof(struct xenon_sdhci_priv),
 	.platdata_auto	= sizeof(struct xenon_sdhci_plat),
 };
	// SPDX-License-Identifier: GPL-2.0
	/*
	* Driver for Marvell SOC Platform Group Xenon SDHC as a platform device
	*
	* Copyright (C) 2016 Marvell, All Rights Reserved.
	*
	* Author: Victor Gu <xigu@marvell.com>
	* Date: 2016-8-24
	*
	* Included parts of the Linux driver version which was written by:
	* Hu Ziji <huziji@marvell.com>
	*
	* Ported to from Marvell 2015.01 to mainline U-Boot 2017.01:
	* Stefan Roese <sr@denx.de>
	*/

	#include <common.h>
	#include <dm.h>
	#include <fdtdec.h>
	#include <linux/bitops.h>
	#include <linux/delay.h>
	#include <linux/libfdt.h>
	#include <malloc.h>
	#include <sdhci.h>
	#include <power/regulator.h>

	DECLARE_GLOBAL_DATA_PTR;

	/* Register Offset of SD Host Controller SOCP self-defined register */
	#define SDHC_SYS_CFG_INFO 0x0104
	#define SLOT_TYPE_SDIO_SHIFT 24
	#define SLOT_TYPE_EMMC_MASK 0xFF
	#define SLOT_TYPE_EMMC_SHIFT 16
	#define SLOT_TYPE_SD_SDIO_MMC_MASK 0xFF
	#define SLOT_TYPE_SD_SDIO_MMC_SHIFT 8
	#define NR_SUPPORTED_SLOT_MASK 0x7

	#define SDHC_SYS_OP_CTRL 0x0108
	#define AUTO_CLKGATE_DISABLE_MASK BIT(20)
	#define SDCLK_IDLEOFF_ENABLE_SHIFT 8
	#define SLOT_ENABLE_SHIFT 0

	#define SDHC_SYS_EXT_OP_CTRL 0x010C
	#define MASK_CMD_CONFLICT_ERROR BIT(8)

	#define SDHC_SLOT_EMMC_CTRL 0x0130
	#define ENABLE_DATA_STROBE_SHIFT 24
	#define SET_EMMC_RSTN_SHIFT 16
	#define EMMC_VCCQ_MASK 0x3
	#define EMMC_VCCQ_1_8V 0x1
	#define EMMC_VCCQ_1_2V 0x2
	#define EMMC_VCCQ_3_3V 0x3

	#define SDHC_SLOT_RETUNING_REQ_CTRL 0x0144
	/* retuning compatible */
	#define RETUNING_COMPATIBLE 0x1

	/* Xenon specific Mode Select value */
	#define XENON_SDHCI_CTRL_HS200 0x5
	#define XENON_SDHCI_CTRL_HS400 0x6

	#define EMMC_PHY_REG_BASE 0x170
	#define EMMC_PHY_TIMING_ADJUST EMMC_PHY_REG_BASE
	#define OUTPUT_QSN_PHASE_SELECT BIT(17)
	#define SAMPL_INV_QSP_PHASE_SELECT BIT(18)
	#define SAMPL_INV_QSP_PHASE_SELECT_SHIFT 18
	#define EMMC_PHY_SLOW_MODE BIT(29)
	#define PHY_INITIALIZAION BIT(31)
	#define WAIT_CYCLE_BEFORE_USING_MASK 0xf
	#define WAIT_CYCLE_BEFORE_USING_SHIFT 12
	#define FC_SYNC_EN_DURATION_MASK 0xf
	#define FC_SYNC_EN_DURATION_SHIFT 8
	#define FC_SYNC_RST_EN_DURATION_MASK 0xf
	#define FC_SYNC_RST_EN_DURATION_SHIFT 4
	#define FC_SYNC_RST_DURATION_MASK 0xf
	#define FC_SYNC_RST_DURATION_SHIFT 0

	#define EMMC_PHY_FUNC_CONTROL (EMMC_PHY_REG_BASE + 0x4)
	#define DQ_ASYNC_MODE BIT(4)
	#define DQ_DDR_MODE_SHIFT 8
	#define DQ_DDR_MODE_MASK 0xff
	#define CMD_DDR_MODE BIT(16)

	#define EMMC_PHY_PAD_CONTROL (EMMC_PHY_REG_BASE + 0x8)
	#define REC_EN_SHIFT 24
	#define REC_EN_MASK 0xf
	#define FC_DQ_RECEN BIT(24)
	#define FC_CMD_RECEN BIT(25)
	#define FC_QSP_RECEN BIT(26)
	#define FC_QSN_RECEN BIT(27)
	#define OEN_QSN BIT(28)
	#define AUTO_RECEN_CTRL BIT(30)

	#define EMMC_PHY_PAD_CONTROL1 (EMMC_PHY_REG_BASE + 0xc)
	#define EMMC5_1_FC_QSP_PD BIT(9)
	#define EMMC5_1_FC_QSP_PU BIT(25)
	#define EMMC5_1_FC_CMD_PD BIT(8)
	#define EMMC5_1_FC_CMD_PU BIT(24)
	#define EMMC5_1_FC_DQ_PD 0xff
	#define EMMC5_1_FC_DQ_PU (0xff << 16)

	#define SDHCI_RETUNE_EVT_INTSIG 0x00001000

	/* Hyperion only have one slot 0 */
	#define XENON_MMC_SLOT_ID_HYPERION 0

	#define MMC_TIMING_LEGACY 0
	#define MMC_TIMING_MMC_HS 1
	#define MMC_TIMING_SD_HS 2
	#define MMC_TIMING_UHS_SDR12 3
	#define MMC_TIMING_UHS_SDR25 4
	#define MMC_TIMING_UHS_SDR50 5
	#define MMC_TIMING_UHS_SDR104 6
	#define MMC_TIMING_UHS_DDR50 7
	#define MMC_TIMING_MMC_DDR52 8
	#define MMC_TIMING_MMC_HS200 9
	#define MMC_TIMING_MMC_HS400 10

	#define XENON_MMC_MAX_CLK 400000000
	#define XENON_MMC_3V3_UV 3300000
	#define XENON_MMC_1V8_UV 1800000

	enum soc_pad_ctrl_type {
	SOC_PAD_SD,
	SOC_PAD_FIXED_1_8V,
	};

	struct xenon_sdhci_plat {
	struct mmc_config cfg;
	struct mmc mmc;
	};

	struct xenon_sdhci_priv {
	struct sdhci_host host;

	u8 timing;

	unsigned int clock;

	void *pad_ctrl_reg;
	int pad_type;

	struct udevice *vqmmc;
	};

	static int xenon_mmc_phy_init(struct sdhci_host *host)
	{
	struct xenon_sdhci_priv *priv = host->mmc->priv;
	u32 clock = priv->clock;
	u32 time;
	u32 var;

	/* Enable QSP PHASE SELECT */
	var = sdhci_readl(host, EMMC_PHY_TIMING_ADJUST);
	var \|= SAMPL_INV_QSP_PHASE_SELECT;
	if ((priv->timing == MMC_TIMING_UHS_SDR50) \|\|
	(priv->timing == MMC_TIMING_UHS_SDR25) \|\|
	(priv->timing == MMC_TIMING_UHS_SDR12) \|\|
	(priv->timing == MMC_TIMING_SD_HS) \|\|
	(priv->timing == MMC_TIMING_LEGACY))
	var \|= EMMC_PHY_SLOW_MODE;
	sdhci_writel(host, var, EMMC_PHY_TIMING_ADJUST);

	/* Poll for host MMC PHY clock init to be stable */
	/* Wait up to 10ms */
	time = 100;
	while (time--) {
	var = sdhci_readl(host, SDHCI_CLOCK_CONTROL);
	if (var & SDHCI_CLOCK_INT_STABLE)
	break;

	udelay(100);
	}

	if (time <= 0) {
	pr_err("Failed to enable MMC internal clock in time\n");
	return -ETIMEDOUT;
	}

	/* Init PHY */
	var = sdhci_readl(host, EMMC_PHY_TIMING_ADJUST);
	var \|= PHY_INITIALIZAION;
	sdhci_writel(host, var, EMMC_PHY_TIMING_ADJUST);

	if (clock == 0) {
	/* Use the possibly slowest bus frequency value */
	clock = 100000;
	}

	/* Poll for host eMMC PHY init to complete */
	/* Wait up to 10ms */
	time = 100;
	while (time--) {
	var = sdhci_readl(host, EMMC_PHY_TIMING_ADJUST);
	var &= PHY_INITIALIZAION;
	if (!var)
	break;

	/* wait for host eMMC PHY init to complete */
	udelay(100);
	}

	if (time <= 0) {
	pr_err("Failed to init MMC PHY in time\n");
	return -ETIMEDOUT;
	}

	return 0;
	}

	#define ARMADA_3700_SOC_PAD_1_8V 0x1
	#define ARMADA_3700_SOC_PAD_3_3V 0x0

	static void armada_3700_soc_pad_voltage_set(struct sdhci_host *host)
	{
	struct xenon_sdhci_priv *priv = host->mmc->priv;

	if (priv->pad_type == SOC_PAD_FIXED_1_8V)
	writel(ARMADA_3700_SOC_PAD_1_8V, priv->pad_ctrl_reg);
	else if (priv->pad_type == SOC_PAD_SD)
	writel(ARMADA_3700_SOC_PAD_3_3V, priv->pad_ctrl_reg);
	}

	static int xenon_mmc_start_signal_voltage_switch(struct sdhci_host *host)
	{
	struct xenon_sdhci_priv *priv = host->mmc->priv;
	u8 voltage;
	u32 ctrl;
	int ret = 0;

	/* If there is no vqmmc regulator, return */
	if (!priv->vqmmc)
	return 0;

	if (priv->pad_type == SOC_PAD_FIXED_1_8V) {
	/* Switch to 1.8v */
	ret = regulator_set_value(priv->vqmmc,
	XENON_MMC_1V8_UV);
	} else if (priv->pad_type == SOC_PAD_SD) {
	/* Get voltage info */
	voltage = sdhci_readb(host, SDHCI_POWER_CONTROL);
	voltage &= ~SDHCI_POWER_ON;

	if (voltage == SDHCI_POWER_330) {
	/* Switch to 3.3v */
	ret = regulator_set_value(priv->vqmmc,
	XENON_MMC_3V3_UV);
	} else {
	/* Switch to 1.8v */
	ret = regulator_set_value(priv->vqmmc,
	XENON_MMC_1V8_UV);
	}
	}

	/* Set VCCQ, eMMC mode: 1.8V; SD/SDIO mode: 3.3V */
	ctrl = sdhci_readl(host, SDHC_SLOT_EMMC_CTRL);
	if (IS_SD(host->mmc))
	ctrl \|= EMMC_VCCQ_3_3V;
	else
	ctrl \|= EMMC_VCCQ_1_8V;
	sdhci_writel(host, ctrl, SDHC_SLOT_EMMC_CTRL);

	if (ret)
	printf("Signal voltage switch fail\n");

	return ret;
	}

	static void xenon_mmc_phy_set(struct sdhci_host *host)
	{
	struct xenon_sdhci_priv *priv = host->mmc->priv;
	u32 var;

	/* Setup pad, set bit[30], bit[28] and bits[26:24] */
	var = sdhci_readl(host, EMMC_PHY_PAD_CONTROL);
	var \|= AUTO_RECEN_CTRL \| OEN_QSN \| FC_QSP_RECEN \|
	FC_CMD_RECEN \| FC_DQ_RECEN;
	sdhci_writel(host, var, EMMC_PHY_PAD_CONTROL);

	/* Set CMD and DQ Pull Up */
	var = sdhci_readl(host, EMMC_PHY_PAD_CONTROL1);
	var \|= (EMMC5_1_FC_CMD_PU \| EMMC5_1_FC_DQ_PU);
	var &= ~(EMMC5_1_FC_CMD_PD \| EMMC5_1_FC_DQ_PD);
	sdhci_writel(host, var, EMMC_PHY_PAD_CONTROL1);

	/*
	* If timing belongs to high speed, set bit[17] of
	* EMMC_PHY_TIMING_ADJUST register
	*/
	if ((priv->timing == MMC_TIMING_MMC_HS400) \|\|
	(priv->timing == MMC_TIMING_MMC_HS200) \|\|
	(priv->timing == MMC_TIMING_UHS_SDR50) \|\|
	(priv->timing == MMC_TIMING_UHS_SDR104) \|\|
	(priv->timing == MMC_TIMING_UHS_DDR50) \|\|
	(priv->timing == MMC_TIMING_UHS_SDR25) \|\|
	(priv->timing == MMC_TIMING_MMC_DDR52)) {
	var = sdhci_readl(host, EMMC_PHY_TIMING_ADJUST);
	var \|= OUTPUT_QSN_PHASE_SELECT;
	sdhci_writel(host, var, EMMC_PHY_TIMING_ADJUST);
	}

	/*
	* When setting EMMC_PHY_FUNC_CONTROL register,
	* SD clock should be disabled
	*/
	var = sdhci_readl(host, SDHCI_CLOCK_CONTROL);
	var &= ~SDHCI_CLOCK_CARD_EN;
	sdhci_writew(host, var, SDHCI_CLOCK_CONTROL);

	var = sdhci_readl(host, EMMC_PHY_FUNC_CONTROL);
	if (host->mmc->ddr_mode) {
	var \|= (DQ_DDR_MODE_MASK << DQ_DDR_MODE_SHIFT) \| CMD_DDR_MODE;
	} else {
	var &= ~((DQ_DDR_MODE_MASK << DQ_DDR_MODE_SHIFT) \|
	CMD_DDR_MODE);
	}
	sdhci_writel(host, var, EMMC_PHY_FUNC_CONTROL);

	/* Enable bus clock */
	var = sdhci_readl(host, SDHCI_CLOCK_CONTROL);
	var \|= SDHCI_CLOCK_CARD_EN;
	sdhci_writew(host, var, SDHCI_CLOCK_CONTROL);

	xenon_mmc_phy_init(host);
	}

	/* Enable/Disable the Auto Clock Gating function of this slot */
	static void xenon_mmc_set_acg(struct sdhci_host *host, bool enable)
	{
	u32 var;

	var = sdhci_readl(host, SDHC_SYS_OP_CTRL);
	if (enable)
	var &= ~AUTO_CLKGATE_DISABLE_MASK;
	else
	var \|= AUTO_CLKGATE_DISABLE_MASK;

	sdhci_writel(host, var, SDHC_SYS_OP_CTRL);
	}

	#define SLOT_MASK(slot) BIT(slot)

	/* Enable specific slot */
	static void xenon_mmc_enable_slot(struct sdhci_host *host, u8 slot)
	{
	u32 var;

	var = sdhci_readl(host, SDHC_SYS_OP_CTRL);
	var \|= SLOT_MASK(slot) << SLOT_ENABLE_SHIFT;
	sdhci_writel(host, var, SDHC_SYS_OP_CTRL);
	}

	/* Enable Parallel Transfer Mode */
	static void xenon_mmc_enable_parallel_tran(struct sdhci_host *host, u8 slot)
	{
	u32 var;

	var = sdhci_readl(host, SDHC_SYS_EXT_OP_CTRL);
	var \|= SLOT_MASK(slot);
	sdhci_writel(host, var, SDHC_SYS_EXT_OP_CTRL);
	}

	static void xenon_mmc_disable_tuning(struct sdhci_host *host, u8 slot)
	{
	u32 var;

	/* Clear the Re-Tuning Request functionality */
	var = sdhci_readl(host, SDHC_SLOT_RETUNING_REQ_CTRL);
	var &= ~RETUNING_COMPATIBLE;
	sdhci_writel(host, var, SDHC_SLOT_RETUNING_REQ_CTRL);

	/* Clear the Re-tuning Event Signal Enable */
	var = sdhci_readl(host, SDHCI_SIGNAL_ENABLE);
	var &= ~SDHCI_RETUNE_EVT_INTSIG;
	sdhci_writel(host, var, SDHCI_SIGNAL_ENABLE);
	}

	/* Mask command conflict error */
	static void xenon_mask_cmd_conflict_err(struct sdhci_host *host)
	{
	u32 reg;

	reg = sdhci_readl(host, SDHC_SYS_EXT_OP_CTRL);
	reg \|= MASK_CMD_CONFLICT_ERROR;
	sdhci_writel(host, reg, SDHC_SYS_EXT_OP_CTRL);
	}

	/* Platform specific function for post set_ios configuration */
	static int xenon_sdhci_set_ios_post(struct sdhci_host *host)
	{
	struct xenon_sdhci_priv *priv = host->mmc->priv;
	uint speed = host->mmc->tran_speed;
	int pwr_18v = 0;

	/*
	* Signal Voltage Switching is only applicable for Host Controllers
	* v3.00 and above.
	*/
	if (SDHCI_GET_VERSION(host) >= SDHCI_SPEC_300)
	xenon_mmc_start_signal_voltage_switch(host);

	if ((sdhci_readb(host, SDHCI_POWER_CONTROL) & ~SDHCI_POWER_ON) ==
	SDHCI_POWER_180)
	pwr_18v = 1;

	/* Set timing variable according to the configured speed */
	if (IS_SD(host->mmc)) {
	/* SD/SDIO */
	if (pwr_18v) {
	if (host->mmc->ddr_mode)
	priv->timing = MMC_TIMING_UHS_DDR50;
	else if (speed <= 25000000)
	priv->timing = MMC_TIMING_UHS_SDR25;
	else
	priv->timing = MMC_TIMING_UHS_SDR50;
	} else {
	if (speed <= 25000000)
	priv->timing = MMC_TIMING_LEGACY;
	else
	priv->timing = MMC_TIMING_SD_HS;
	}
	} else {
	/* eMMC */
	if (host->mmc->ddr_mode)
	priv->timing = MMC_TIMING_MMC_DDR52;
	else if (speed <= 26000000)
	priv->timing = MMC_TIMING_LEGACY;
	else
	priv->timing = MMC_TIMING_MMC_HS;
	}

	/* Re-init the PHY */
	xenon_mmc_phy_set(host);

	return 0;
	}

	/* Install a driver specific handler for post set_ios configuration */
	static const struct sdhci_ops xenon_sdhci_ops = {
	.set_ios_post = xenon_sdhci_set_ios_post
	};

	static int xenon_sdhci_probe(struct udevice *dev)
	{
	struct xenon_sdhci_plat *plat = dev_get_platdata(dev);
	struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
	struct xenon_sdhci_priv *priv = dev_get_priv(dev);
	struct sdhci_host *host = dev_get_priv(dev);
	int ret;

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

	/* Set quirks */
	host->quirks = SDHCI_QUIRK_WAIT_SEND_CMD \| SDHCI_QUIRK_32BIT_DMA_ADDR;

	/* Set default timing */
	priv->timing = MMC_TIMING_LEGACY;

	/* Get the vqmmc regulator if there is */
	device_get_supply_regulator(dev, "vqmmc-supply", &priv->vqmmc);
	/* Set the initial voltage value to 3.3V if there is regulator */
	if (priv->vqmmc) {
	ret = regulator_set_value(priv->vqmmc,
	XENON_MMC_3V3_UV);
	if (ret) {
	printf("Failed to set VQMMC regulator to 3.3V\n");
	return ret;
	}
	}

	/* Disable auto clock gating during init */
	xenon_mmc_set_acg(host, false);

	/* Enable slot */
	xenon_mmc_enable_slot(host, XENON_MMC_SLOT_ID_HYPERION);

	/*
	* Set default power on SoC PHY PAD register (currently only
	* available on the Armada 3700)
	*/
	if (priv->pad_ctrl_reg)
	armada_3700_soc_pad_voltage_set(host);

	host->host_caps = MMC_MODE_HS \| MMC_MODE_HS_52MHz \| MMC_MODE_DDR_52MHz;

	ret = mmc_of_parse(dev, &plat->cfg);
	if (ret)
	return ret;

	host->ops = &xenon_sdhci_ops;

	host->max_clk = XENON_MMC_MAX_CLK;
	ret = sdhci_setup_cfg(&plat->cfg, host, XENON_MMC_MAX_CLK, 0);
	if (ret)
	return ret;

	ret = sdhci_probe(dev);
	if (ret)
	return ret;

	/* Enable parallel transfer */
	xenon_mmc_enable_parallel_tran(host, XENON_MMC_SLOT_ID_HYPERION);

	/* Disable tuning functionality of this slot */
	xenon_mmc_disable_tuning(host, XENON_MMC_SLOT_ID_HYPERION);

	/* Enable auto clock gating after init */
	xenon_mmc_set_acg(host, true);

	xenon_mask_cmd_conflict_err(host);

	return ret;
	}

	static int xenon_sdhci_ofdata_to_platdata(struct udevice *dev)
	{
	struct sdhci_host *host = dev_get_priv(dev);
	struct xenon_sdhci_priv *priv = dev_get_priv(dev);
	const char *name;

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

	if (device_is_compatible(dev, "marvell,armada-3700-sdhci"))
	priv->pad_ctrl_reg = (void *)devfdt_get_addr_index(dev, 1);

	name = fdt_getprop(gd->fdt_blob, dev_of_offset(dev), "marvell,pad-type",
	NULL);
	if (name) {
	if (0 == strncmp(name, "sd", 2)) {
	priv->pad_type = SOC_PAD_SD;
	} else if (0 == strncmp(name, "fixed-1-8v", 10)) {
	priv->pad_type = SOC_PAD_FIXED_1_8V;
	} else {
	printf("Unsupported SOC PHY PAD ctrl type %s\n", name);
	return -EINVAL;
	}
	}

	return 0;
	}

	static int xenon_sdhci_bind(struct udevice *dev)
	{
	struct xenon_sdhci_plat *plat = dev_get_platdata(dev);

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

	static const struct udevice_id xenon_sdhci_ids[] = {
	{ .compatible = "marvell,armada-8k-sdhci",},
	{ .compatible = "marvell,armada-3700-sdhci",},
	{ }
	};

	U_BOOT_DRIVER(xenon_sdhci_drv) = {
	.name = "xenon_sdhci",
	.id = UCLASS_MMC,
	.of_match = xenon_sdhci_ids,
	.ofdata_to_platdata = xenon_sdhci_ofdata_to_platdata,
	.ops = &sdhci_ops,
	.bind = xenon_sdhci_bind,
	.probe = xenon_sdhci_probe,
	.priv_auto = sizeof(struct xenon_sdhci_priv),
	.platdata_auto = sizeof(struct xenon_sdhci_plat),
	};