drivers/mmc/host/sdhci-of-esdhc.c - kernel/msm-4.19 - Gitiles

 /*
  * Freescale eSDHC controller driver.
  *
  * Copyright (c) 2007, 2010, 2012 Freescale Semiconductor, Inc.
  * Copyright (c) 2009 MontaVista Software, Inc.
  *
  * Authors: Xiaobo Xie <X.Xie@freescale.com>
  *	    Anton Vorontsov <avorontsov@ru.mvista.com>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation; either version 2 of the License, or (at
  * your option) any later version.
  */

 #include <linux/err.h>
 #include <linux/io.h>
 #include <linux/of.h>
 #include <linux/delay.h>
 #include <linux/module.h>
 #include <linux/sys_soc.h>
 #include <linux/mmc/host.h>
 #include "sdhci-pltfm.h"
 #include "sdhci-esdhc.h"

 #define VENDOR_V_22	0x12
 #define VENDOR_V_23	0x13

 struct sdhci_esdhc {
 	u8 vendor_ver;
 	u8 spec_ver;
 	bool quirk_incorrect_hostver;
 };

 /**
  * esdhc_read*_fixup - Fixup the value read from incompatible eSDHC register
  *		       to make it compatible with SD spec.
  *
  * @host: pointer to sdhci_host
  * @spec_reg: SD spec register address
  * @value: 32bit eSDHC register value on spec_reg address
  *
  * In SD spec, there are 8/16/32/64 bits registers, while all of eSDHC
  * registers are 32 bits. There are differences in register size, register
  * address, register function, bit position and function between eSDHC spec
  * and SD spec.
  *
  * Return a fixed up register value
  */
 static u32 esdhc_readl_fixup(struct sdhci_host *host,
 				     int spec_reg, u32 value)
 {
 	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 	struct sdhci_esdhc *esdhc = sdhci_pltfm_priv(pltfm_host);
 	u32 ret;

 	/*
 	 * The bit of ADMA flag in eSDHC is not compatible with standard
 	 * SDHC register, so set fake flag SDHCI_CAN_DO_ADMA2 when ADMA is
 	 * supported by eSDHC.
 	 * And for many FSL eSDHC controller, the reset value of field
 	 * SDHCI_CAN_DO_ADMA1 is 1, but some of them can't support ADMA,
 	 * only these vendor version is greater than 2.2/0x12 support ADMA.
 	 */
 	if ((spec_reg == SDHCI_CAPABILITIES) && (value & SDHCI_CAN_DO_ADMA1)) {
 		if (esdhc->vendor_ver > VENDOR_V_22) {
 			ret = value | SDHCI_CAN_DO_ADMA2;
 			return ret;
 		}
 	}
 	/*
 	 * The DAT[3:0] line signal levels and the CMD line signal level are
 	 * not compatible with standard SDHC register. The line signal levels
 	 * DAT[7:0] are at bits 31:24 and the command line signal level is at
 	 * bit 23. All other bits are the same as in the standard SDHC
 	 * register.
 	 */
 	if (spec_reg == SDHCI_PRESENT_STATE) {
 		ret = value & 0x000fffff;
 		ret |= (value >> 4) & SDHCI_DATA_LVL_MASK;
 		ret |= (value << 1) & SDHCI_CMD_LVL;
 		return ret;
 	}

 	ret = value;
 	return ret;
 }

 static u16 esdhc_readw_fixup(struct sdhci_host *host,
 				     int spec_reg, u32 value)
 {
 	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 	struct sdhci_esdhc *esdhc = sdhci_pltfm_priv(pltfm_host);
 	u16 ret;
 	int shift = (spec_reg & 0x2) * 8;

 	if (spec_reg == SDHCI_HOST_VERSION)
 		ret = value & 0xffff;
 	else
 		ret = (value >> shift) & 0xffff;
 	/* Workaround for T4240-R1.0-R2.0 eSDHC which has incorrect
 	 * vendor version and spec version information.
 	 */
 	if ((spec_reg == SDHCI_HOST_VERSION) &&
 	    (esdhc->quirk_incorrect_hostver))
 		ret = (VENDOR_V_23 << SDHCI_VENDOR_VER_SHIFT) | SDHCI_SPEC_200;
 	return ret;
 }

 static u8 esdhc_readb_fixup(struct sdhci_host *host,
 				     int spec_reg, u32 value)
 {
 	u8 ret;
 	u8 dma_bits;
 	int shift = (spec_reg & 0x3) * 8;

 	ret = (value >> shift) & 0xff;

 	/*
 	 * "DMA select" locates at offset 0x28 in SD specification, but on
 	 * P5020 or P3041, it locates at 0x29.
 	 */
 	if (spec_reg == SDHCI_HOST_CONTROL) {
 		/* DMA select is 22,23 bits in Protocol Control Register */
 		dma_bits = (value >> 5) & SDHCI_CTRL_DMA_MASK;
 		/* fixup the result */
 		ret &= ~SDHCI_CTRL_DMA_MASK;
 		ret |= dma_bits;
 	}
 	return ret;
 }

 /**
  * esdhc_write*_fixup - Fixup the SD spec register value so that it could be
  *			written into eSDHC register.
  *
  * @host: pointer to sdhci_host
  * @spec_reg: SD spec register address
  * @value: 8/16/32bit SD spec register value that would be written
  * @old_value: 32bit eSDHC register value on spec_reg address
  *
  * In SD spec, there are 8/16/32/64 bits registers, while all of eSDHC
  * registers are 32 bits. There are differences in register size, register
  * address, register function, bit position and function between eSDHC spec
  * and SD spec.
  *
  * Return a fixed up register value
  */
 static u32 esdhc_writel_fixup(struct sdhci_host *host,
 				     int spec_reg, u32 value, u32 old_value)
 {
 	u32 ret;

 	/*
 	 * Enabling IRQSTATEN[BGESEN] is just to set IRQSTAT[BGE]
 	 * when SYSCTL[RSTD] is set for some special operations.
 	 * No any impact on other operation.
 	 */
 	if (spec_reg == SDHCI_INT_ENABLE)
 		ret = value | SDHCI_INT_BLK_GAP;
 	else
 		ret = value;

 	return ret;
 }

 static u32 esdhc_writew_fixup(struct sdhci_host *host,
 				     int spec_reg, u16 value, u32 old_value)
 {
 	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 	int shift = (spec_reg & 0x2) * 8;
 	u32 ret;

 	switch (spec_reg) {
 	case SDHCI_TRANSFER_MODE:
 		/*
 		 * Postpone this write, we must do it together with a
 		 * command write that is down below. Return old value.
 		 */
 		pltfm_host->xfer_mode_shadow = value;
 		return old_value;
 	case SDHCI_COMMAND:
 		ret = (value << 16) | pltfm_host->xfer_mode_shadow;
 		return ret;
 	}

 	ret = old_value & (~(0xffff << shift));
 	ret |= (value << shift);

 	if (spec_reg == SDHCI_BLOCK_SIZE) {
 		/*
 		 * Two last DMA bits are reserved, and first one is used for
 		 * non-standard blksz of 4096 bytes that we don't support
 		 * yet. So clear the DMA boundary bits.
 		 */
 		ret &= (~SDHCI_MAKE_BLKSZ(0x7, 0));
 	}
 	return ret;
 }

 static u32 esdhc_writeb_fixup(struct sdhci_host *host,
 				     int spec_reg, u8 value, u32 old_value)
 {
 	u32 ret;
 	u32 dma_bits;
 	u8 tmp;
 	int shift = (spec_reg & 0x3) * 8;

 	/*
 	 * eSDHC doesn't have a standard power control register, so we do
 	 * nothing here to avoid incorrect operation.
 	 */
 	if (spec_reg == SDHCI_POWER_CONTROL)
 		return old_value;
 	/*
 	 * "DMA select" location is offset 0x28 in SD specification, but on
 	 * P5020 or P3041, it's located at 0x29.
 	 */
 	if (spec_reg == SDHCI_HOST_CONTROL) {
 		/*
 		 * If host control register is not standard, exit
 		 * this function
 		 */
 		if (host->quirks2 & SDHCI_QUIRK2_BROKEN_HOST_CONTROL)
 			return old_value;

 		/* DMA select is 22,23 bits in Protocol Control Register */
 		dma_bits = (value & SDHCI_CTRL_DMA_MASK) << 5;
 		ret = (old_value & (~(SDHCI_CTRL_DMA_MASK << 5))) | dma_bits;
 		tmp = (value & (~SDHCI_CTRL_DMA_MASK)) |
 		      (old_value & SDHCI_CTRL_DMA_MASK);
 		ret = (ret & (~0xff)) | tmp;

 		/* Prevent SDHCI core from writing reserved bits (e.g. HISPD) */
 		ret &= ~ESDHC_HOST_CONTROL_RES;
 		return ret;
 	}

 	ret = (old_value & (~(0xff << shift))) | (value << shift);
 	return ret;
 }

 static u32 esdhc_be_readl(struct sdhci_host *host, int reg)
 {
 	u32 ret;
 	u32 value;

 	value = ioread32be(host->ioaddr + reg);
 	ret = esdhc_readl_fixup(host, reg, value);

 	return ret;
 }

 static u32 esdhc_le_readl(struct sdhci_host *host, int reg)
 {
 	u32 ret;
 	u32 value;

 	value = ioread32(host->ioaddr + reg);
 	ret = esdhc_readl_fixup(host, reg, value);

 	return ret;
 }

 static u16 esdhc_be_readw(struct sdhci_host *host, int reg)
 {
 	u16 ret;
 	u32 value;
 	int base = reg & ~0x3;

 	value = ioread32be(host->ioaddr + base);
 	ret = esdhc_readw_fixup(host, reg, value);
 	return ret;
 }

 static u16 esdhc_le_readw(struct sdhci_host *host, int reg)
 {
 	u16 ret;
 	u32 value;
 	int base = reg & ~0x3;

 	value = ioread32(host->ioaddr + base);
 	ret = esdhc_readw_fixup(host, reg, value);
 	return ret;
 }

 static u8 esdhc_be_readb(struct sdhci_host *host, int reg)
 {
 	u8 ret;
 	u32 value;
 	int base = reg & ~0x3;

 	value = ioread32be(host->ioaddr + base);
 	ret = esdhc_readb_fixup(host, reg, value);
 	return ret;
 }

 static u8 esdhc_le_readb(struct sdhci_host *host, int reg)
 {
 	u8 ret;
 	u32 value;
 	int base = reg & ~0x3;

 	value = ioread32(host->ioaddr + base);
 	ret = esdhc_readb_fixup(host, reg, value);
 	return ret;
 }

 static void esdhc_be_writel(struct sdhci_host *host, u32 val, int reg)
 {
 	u32 value;

 	value = esdhc_writel_fixup(host, reg, val, 0);
 	iowrite32be(value, host->ioaddr + reg);
 }

 static void esdhc_le_writel(struct sdhci_host *host, u32 val, int reg)
 {
 	u32 value;

 	value = esdhc_writel_fixup(host, reg, val, 0);
 	iowrite32(value, host->ioaddr + reg);
 }

 static void esdhc_be_writew(struct sdhci_host *host, u16 val, int reg)
 {
 	int base = reg & ~0x3;
 	u32 value;
 	u32 ret;

 	value = ioread32be(host->ioaddr + base);
 	ret = esdhc_writew_fixup(host, reg, val, value);
 	if (reg != SDHCI_TRANSFER_MODE)
 		iowrite32be(ret, host->ioaddr + base);
 }

 static void esdhc_le_writew(struct sdhci_host *host, u16 val, int reg)
 {
 	int base = reg & ~0x3;
 	u32 value;
 	u32 ret;

 	value = ioread32(host->ioaddr + base);
 	ret = esdhc_writew_fixup(host, reg, val, value);
 	if (reg != SDHCI_TRANSFER_MODE)
 		iowrite32(ret, host->ioaddr + base);
 }

 static void esdhc_be_writeb(struct sdhci_host *host, u8 val, int reg)
 {
 	int base = reg & ~0x3;
 	u32 value;
 	u32 ret;

 	value = ioread32be(host->ioaddr + base);
 	ret = esdhc_writeb_fixup(host, reg, val, value);
 	iowrite32be(ret, host->ioaddr + base);
 }

 static void esdhc_le_writeb(struct sdhci_host *host, u8 val, int reg)
 {
 	int base = reg & ~0x3;
 	u32 value;
 	u32 ret;

 	value = ioread32(host->ioaddr + base);
 	ret = esdhc_writeb_fixup(host, reg, val, value);
 	iowrite32(ret, host->ioaddr + base);
 }

 /*
  * For Abort or Suspend after Stop at Block Gap, ignore the ADMA
  * error(IRQSTAT[ADMAE]) if both Transfer Complete(IRQSTAT[TC])
  * and Block Gap Event(IRQSTAT[BGE]) are also set.
  * For Continue, apply soft reset for data(SYSCTL[RSTD]);
  * and re-issue the entire read transaction from beginning.
  */
 static void esdhc_of_adma_workaround(struct sdhci_host *host, u32 intmask)
 {
 	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 	struct sdhci_esdhc *esdhc = sdhci_pltfm_priv(pltfm_host);
 	bool applicable;
 	dma_addr_t dmastart;
 	dma_addr_t dmanow;

 	applicable = (intmask & SDHCI_INT_DATA_END) &&
 		     (intmask & SDHCI_INT_BLK_GAP) &&
 		     (esdhc->vendor_ver == VENDOR_V_23);
 	if (!applicable)
 		return;

 	host->data->error = 0;
 	dmastart = sg_dma_address(host->data->sg);
 	dmanow = dmastart + host->data->bytes_xfered;
 	/*
 	 * Force update to the next DMA block boundary.
 	 */
 	dmanow = (dmanow & ~(SDHCI_DEFAULT_BOUNDARY_SIZE - 1)) +
 		SDHCI_DEFAULT_BOUNDARY_SIZE;
 	host->data->bytes_xfered = dmanow - dmastart;
 	sdhci_writel(host, dmanow, SDHCI_DMA_ADDRESS);
 }

 static int esdhc_of_enable_dma(struct sdhci_host *host)
 {
 	u32 value;

 	value = sdhci_readl(host, ESDHC_DMA_SYSCTL);
 	value |= ESDHC_DMA_SNOOP;
 	sdhci_writel(host, value, ESDHC_DMA_SYSCTL);
 	return 0;
 }

 static unsigned int esdhc_of_get_max_clock(struct sdhci_host *host)
 {
 	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);

 	return pltfm_host->clock;
 }

 static unsigned int esdhc_of_get_min_clock(struct sdhci_host *host)
 {
 	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);

 	return pltfm_host->clock / 256 / 16;
 }

 static void esdhc_of_set_clock(struct sdhci_host *host, unsigned int clock)
 {
 	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 	struct sdhci_esdhc *esdhc = sdhci_pltfm_priv(pltfm_host);
 	int pre_div = 1;
 	int div = 1;
 	u32 temp;

 	host->mmc->actual_clock = 0;

 	if (clock == 0)
 		return;

 	/* Workaround to start pre_div at 2 for VNN < VENDOR_V_23 */
 	if (esdhc->vendor_ver < VENDOR_V_23)
 		pre_div = 2;

 	/* Workaround to reduce the clock frequency for p1010 esdhc */
 	if (of_find_compatible_node(NULL, NULL, "fsl,p1010-esdhc")) {
 		if (clock > 20000000)
 			clock -= 5000000;
 		if (clock > 40000000)
 			clock -= 5000000;
 	}

 	temp = sdhci_readl(host, ESDHC_SYSTEM_CONTROL);
 	temp &= ~(ESDHC_CLOCK_IPGEN | ESDHC_CLOCK_HCKEN | ESDHC_CLOCK_PEREN
 		| ESDHC_CLOCK_MASK);
 	sdhci_writel(host, temp, ESDHC_SYSTEM_CONTROL);

 	while (host->max_clk / pre_div / 16 > clock && pre_div < 256)
 		pre_div *= 2;

 	while (host->max_clk / pre_div / div > clock && div < 16)
 		div++;

 	dev_dbg(mmc_dev(host->mmc), "desired SD clock: %d, actual: %d\n",
 		clock, host->max_clk / pre_div / div);
 	host->mmc->actual_clock = host->max_clk / pre_div / div;
 	pre_div >>= 1;
 	div--;

 	temp = sdhci_readl(host, ESDHC_SYSTEM_CONTROL);
 	temp |= (ESDHC_CLOCK_IPGEN | ESDHC_CLOCK_HCKEN | ESDHC_CLOCK_PEREN
 		| (div << ESDHC_DIVIDER_SHIFT)
 		| (pre_div << ESDHC_PREDIV_SHIFT));
 	sdhci_writel(host, temp, ESDHC_SYSTEM_CONTROL);
 	mdelay(1);
 }

 static void esdhc_pltfm_set_bus_width(struct sdhci_host *host, int width)
 {
 	u32 ctrl;

 	ctrl = sdhci_readl(host, ESDHC_PROCTL);
 	ctrl &= (~ESDHC_CTRL_BUSWIDTH_MASK);
 	switch (width) {
 	case MMC_BUS_WIDTH_8:
 		ctrl |= ESDHC_CTRL_8BITBUS;
 		break;

 	case MMC_BUS_WIDTH_4:
 		ctrl |= ESDHC_CTRL_4BITBUS;
 		break;

 	default:
 		break;
 	}

 	sdhci_writel(host, ctrl, ESDHC_PROCTL);
 }

 static void esdhc_reset(struct sdhci_host *host, u8 mask)
 {
 	sdhci_reset(host, mask);

 	sdhci_writel(host, host->ier, SDHCI_INT_ENABLE);
 	sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE);
 }

 #ifdef CONFIG_PM_SLEEP
 static u32 esdhc_proctl;
 static int esdhc_of_suspend(struct device *dev)
 {
 	struct sdhci_host *host = dev_get_drvdata(dev);

 	esdhc_proctl = sdhci_readl(host, SDHCI_HOST_CONTROL);

 	return sdhci_suspend_host(host);
 }

 static int esdhc_of_resume(struct device *dev)
 {
 	struct sdhci_host *host = dev_get_drvdata(dev);
 	int ret = sdhci_resume_host(host);

 	if (ret == 0) {
 		/* Isn't this already done by sdhci_resume_host() ? --rmk */
 		esdhc_of_enable_dma(host);
 		sdhci_writel(host, esdhc_proctl, SDHCI_HOST_CONTROL);
 	}
 	return ret;
 }
 #endif

 static SIMPLE_DEV_PM_OPS(esdhc_of_dev_pm_ops,
 			esdhc_of_suspend,
 			esdhc_of_resume);

 static const struct sdhci_ops sdhci_esdhc_be_ops = {
 	.read_l = esdhc_be_readl,
 	.read_w = esdhc_be_readw,
 	.read_b = esdhc_be_readb,
 	.write_l = esdhc_be_writel,
 	.write_w = esdhc_be_writew,
 	.write_b = esdhc_be_writeb,
 	.set_clock = esdhc_of_set_clock,
 	.enable_dma = esdhc_of_enable_dma,
 	.get_max_clock = esdhc_of_get_max_clock,
 	.get_min_clock = esdhc_of_get_min_clock,
 	.adma_workaround = esdhc_of_adma_workaround,
 	.set_bus_width = esdhc_pltfm_set_bus_width,
 	.reset = esdhc_reset,
 	.set_uhs_signaling = sdhci_set_uhs_signaling,
 };

 static const struct sdhci_ops sdhci_esdhc_le_ops = {
 	.read_l = esdhc_le_readl,
 	.read_w = esdhc_le_readw,
 	.read_b = esdhc_le_readb,
 	.write_l = esdhc_le_writel,
 	.write_w = esdhc_le_writew,
 	.write_b = esdhc_le_writeb,
 	.set_clock = esdhc_of_set_clock,
 	.enable_dma = esdhc_of_enable_dma,
 	.get_max_clock = esdhc_of_get_max_clock,
 	.get_min_clock = esdhc_of_get_min_clock,
 	.adma_workaround = esdhc_of_adma_workaround,
 	.set_bus_width = esdhc_pltfm_set_bus_width,
 	.reset = esdhc_reset,
 	.set_uhs_signaling = sdhci_set_uhs_signaling,
 };

 static const struct sdhci_pltfm_data sdhci_esdhc_be_pdata = {
 	.quirks = ESDHC_DEFAULT_QUIRKS |
 #ifdef CONFIG_PPC
 		  SDHCI_QUIRK_BROKEN_CARD_DETECTION |
 #endif
 		  SDHCI_QUIRK_NO_CARD_NO_RESET |
 		  SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
 	.ops = &sdhci_esdhc_be_ops,
 };

 static const struct sdhci_pltfm_data sdhci_esdhc_le_pdata = {
 	.quirks = ESDHC_DEFAULT_QUIRKS |
 		  SDHCI_QUIRK_NO_CARD_NO_RESET |
 		  SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
 	.ops = &sdhci_esdhc_le_ops,
 };

 static struct soc_device_attribute soc_incorrect_hostver[] = {
 	{ .family = "QorIQ T4240", .revision = "1.0", },
 	{ .family = "QorIQ T4240", .revision = "2.0", },
 	{ },
 };

 static void esdhc_init(struct platform_device *pdev, struct sdhci_host *host)
 {
 	struct sdhci_pltfm_host *pltfm_host;
 	struct sdhci_esdhc *esdhc;
 	u16 host_ver;

 	pltfm_host = sdhci_priv(host);
 	esdhc = sdhci_pltfm_priv(pltfm_host);

 	host_ver = sdhci_readw(host, SDHCI_HOST_VERSION);
 	esdhc->vendor_ver = (host_ver & SDHCI_VENDOR_VER_MASK) >>
 			     SDHCI_VENDOR_VER_SHIFT;
 	esdhc->spec_ver = host_ver & SDHCI_SPEC_VER_MASK;
 	if (soc_device_match(soc_incorrect_hostver))
 		esdhc->quirk_incorrect_hostver = true;
 	else
 		esdhc->quirk_incorrect_hostver = false;
 }

 static int sdhci_esdhc_probe(struct platform_device *pdev)
 {
 	struct sdhci_host *host;
 	struct device_node *np;
 	struct sdhci_pltfm_host *pltfm_host;
 	struct sdhci_esdhc *esdhc;
 	int ret;

 	np = pdev->dev.of_node;

 	if (of_property_read_bool(np, "little-endian"))
 		host = sdhci_pltfm_init(pdev, &sdhci_esdhc_le_pdata,
 					sizeof(struct sdhci_esdhc));
 	else
 		host = sdhci_pltfm_init(pdev, &sdhci_esdhc_be_pdata,
 					sizeof(struct sdhci_esdhc));

 	if (IS_ERR(host))
 		return PTR_ERR(host);

 	esdhc_init(pdev, host);

 	sdhci_get_of_property(pdev);

 	pltfm_host = sdhci_priv(host);
 	esdhc = sdhci_pltfm_priv(pltfm_host);
 	if (esdhc->vendor_ver == VENDOR_V_22)
 		host->quirks2 |= SDHCI_QUIRK2_HOST_NO_CMD23;

 	if (esdhc->vendor_ver > VENDOR_V_22)
 		host->quirks &= ~SDHCI_QUIRK_NO_BUSY_IRQ;

 	if (of_device_is_compatible(np, "fsl,p5040-esdhc") ||
 	    of_device_is_compatible(np, "fsl,p5020-esdhc") ||
 	    of_device_is_compatible(np, "fsl,p4080-esdhc") ||
 	    of_device_is_compatible(np, "fsl,p1020-esdhc") ||
 	    of_device_is_compatible(np, "fsl,t1040-esdhc"))
 		host->quirks &= ~SDHCI_QUIRK_BROKEN_CARD_DETECTION;

 	if (of_device_is_compatible(np, "fsl,ls1021a-esdhc"))
 		host->quirks |= SDHCI_QUIRK_BROKEN_TIMEOUT_VAL;

 	if (of_device_is_compatible(np, "fsl,p2020-esdhc")) {
 		/*
 		 * Freescale messed up with P2020 as it has a non-standard
 		 * host control register
 		 */
 		host->quirks2 |= SDHCI_QUIRK2_BROKEN_HOST_CONTROL;
 	}

 	/* call to generic mmc_of_parse to support additional capabilities */
 	ret = mmc_of_parse(host->mmc);
 	if (ret)
 		goto err;

 	mmc_of_parse_voltage(np, &host->ocr_mask);

 	ret = sdhci_add_host(host);
 	if (ret)
 		goto err;

 	return 0;
  err:
 	sdhci_pltfm_free(pdev);
 	return ret;
 }

 static const struct of_device_id sdhci_esdhc_of_match[] = {
 	{ .compatible = "fsl,mpc8379-esdhc" },
 	{ .compatible = "fsl,mpc8536-esdhc" },
 	{ .compatible = "fsl,esdhc" },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, sdhci_esdhc_of_match);

 static struct platform_driver sdhci_esdhc_driver = {
 	.driver = {
 		.name = "sdhci-esdhc",
 		.of_match_table = sdhci_esdhc_of_match,
 		.pm = &esdhc_of_dev_pm_ops,
 	},
 	.probe = sdhci_esdhc_probe,
 	.remove = sdhci_pltfm_unregister,
 };

 module_platform_driver(sdhci_esdhc_driver);

 MODULE_DESCRIPTION("SDHCI OF driver for Freescale MPC eSDHC");
 MODULE_AUTHOR("Xiaobo Xie <X.Xie@freescale.com>, "
 	      "Anton Vorontsov <avorontsov@ru.mvista.com>");
 MODULE_LICENSE("GPL v2");
	/*
	* Freescale eSDHC controller driver.
	*
	* Copyright (c) 2007, 2010, 2012 Freescale Semiconductor, Inc.
	* Copyright (c) 2009 MontaVista Software, Inc.
	*
	* Authors: Xiaobo Xie <X.Xie@freescale.com>
	* Anton Vorontsov <avorontsov@ru.mvista.com>
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License as published by
	* the Free Software Foundation; either version 2 of the License, or (at
	* your option) any later version.
	*/

	#include <linux/err.h>
	#include <linux/io.h>
	#include <linux/of.h>
	#include <linux/delay.h>
	#include <linux/module.h>
	#include <linux/sys_soc.h>
	#include <linux/mmc/host.h>
	#include "sdhci-pltfm.h"
	#include "sdhci-esdhc.h"

	#define VENDOR_V_22 0x12
	#define VENDOR_V_23 0x13

	struct sdhci_esdhc {
	u8 vendor_ver;
	u8 spec_ver;
	bool quirk_incorrect_hostver;
	};

	/**
	* esdhc_read*_fixup - Fixup the value read from incompatible eSDHC register
	* to make it compatible with SD spec.
	*
	* @host: pointer to sdhci_host
	* @spec_reg: SD spec register address
	* @value: 32bit eSDHC register value on spec_reg address
	*
	* In SD spec, there are 8/16/32/64 bits registers, while all of eSDHC
	* registers are 32 bits. There are differences in register size, register
	* address, register function, bit position and function between eSDHC spec
	* and SD spec.
	*
	* Return a fixed up register value
	*/
	static u32 esdhc_readl_fixup(struct sdhci_host *host,
	int spec_reg, u32 value)
	{
	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
	struct sdhci_esdhc *esdhc = sdhci_pltfm_priv(pltfm_host);
	u32 ret;

	/*
	* The bit of ADMA flag in eSDHC is not compatible with standard
	* SDHC register, so set fake flag SDHCI_CAN_DO_ADMA2 when ADMA is
	* supported by eSDHC.
	* And for many FSL eSDHC controller, the reset value of field
	* SDHCI_CAN_DO_ADMA1 is 1, but some of them can't support ADMA,
	* only these vendor version is greater than 2.2/0x12 support ADMA.
	*/
	if ((spec_reg == SDHCI_CAPABILITIES) && (value & SDHCI_CAN_DO_ADMA1)) {
	if (esdhc->vendor_ver > VENDOR_V_22) {
	ret = value \| SDHCI_CAN_DO_ADMA2;
	return ret;
	}
	}
	/*
	* The DAT[3:0] line signal levels and the CMD line signal level are
	* not compatible with standard SDHC register. The line signal levels
	* DAT[7:0] are at bits 31:24 and the command line signal level is at
	* bit 23. All other bits are the same as in the standard SDHC
	* register.
	*/
	if (spec_reg == SDHCI_PRESENT_STATE) {
	ret = value & 0x000fffff;
	ret \|= (value >> 4) & SDHCI_DATA_LVL_MASK;
	ret \|= (value << 1) & SDHCI_CMD_LVL;
	return ret;
	}

	ret = value;
	return ret;
	}

	static u16 esdhc_readw_fixup(struct sdhci_host *host,
	int spec_reg, u32 value)
	{
	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
	struct sdhci_esdhc *esdhc = sdhci_pltfm_priv(pltfm_host);
	u16 ret;
	int shift = (spec_reg & 0x2) * 8;

	if (spec_reg == SDHCI_HOST_VERSION)
	ret = value & 0xffff;
	else
	ret = (value >> shift) & 0xffff;
	/* Workaround for T4240-R1.0-R2.0 eSDHC which has incorrect
	* vendor version and spec version information.
	*/
	if ((spec_reg == SDHCI_HOST_VERSION) &&
	(esdhc->quirk_incorrect_hostver))
	ret = (VENDOR_V_23 << SDHCI_VENDOR_VER_SHIFT) \| SDHCI_SPEC_200;
	return ret;
	}

	static u8 esdhc_readb_fixup(struct sdhci_host *host,
	int spec_reg, u32 value)
	{
	u8 ret;
	u8 dma_bits;
	int shift = (spec_reg & 0x3) * 8;

	ret = (value >> shift) & 0xff;

	/*
	* "DMA select" locates at offset 0x28 in SD specification, but on
	* P5020 or P3041, it locates at 0x29.
	*/
	if (spec_reg == SDHCI_HOST_CONTROL) {
	/* DMA select is 22,23 bits in Protocol Control Register */
	dma_bits = (value >> 5) & SDHCI_CTRL_DMA_MASK;
	/* fixup the result */
	ret &= ~SDHCI_CTRL_DMA_MASK;
	ret \|= dma_bits;
	}
	return ret;
	}

	/**
	* esdhc_write*_fixup - Fixup the SD spec register value so that it could be
	* written into eSDHC register.
	*
	* @host: pointer to sdhci_host
	* @spec_reg: SD spec register address
	* @value: 8/16/32bit SD spec register value that would be written
	* @old_value: 32bit eSDHC register value on spec_reg address
	*
	* In SD spec, there are 8/16/32/64 bits registers, while all of eSDHC
	* registers are 32 bits. There are differences in register size, register
	* address, register function, bit position and function between eSDHC spec
	* and SD spec.
	*
	* Return a fixed up register value
	*/
	static u32 esdhc_writel_fixup(struct sdhci_host *host,
	int spec_reg, u32 value, u32 old_value)
	{
	u32 ret;

	/*
	* Enabling IRQSTATEN[BGESEN] is just to set IRQSTAT[BGE]
	* when SYSCTL[RSTD] is set for some special operations.
	* No any impact on other operation.
	*/
	if (spec_reg == SDHCI_INT_ENABLE)
	ret = value \| SDHCI_INT_BLK_GAP;
	else
	ret = value;

	return ret;
	}

	static u32 esdhc_writew_fixup(struct sdhci_host *host,
	int spec_reg, u16 value, u32 old_value)
	{
	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
	int shift = (spec_reg & 0x2) * 8;
	u32 ret;

	switch (spec_reg) {
	case SDHCI_TRANSFER_MODE:
	/*
	* Postpone this write, we must do it together with a
	* command write that is down below. Return old value.
	*/
	pltfm_host->xfer_mode_shadow = value;
	return old_value;
	case SDHCI_COMMAND:
	ret = (value << 16) \| pltfm_host->xfer_mode_shadow;
	return ret;
	}

	ret = old_value & (~(0xffff << shift));
	ret \|= (value << shift);

	if (spec_reg == SDHCI_BLOCK_SIZE) {
	/*
	* Two last DMA bits are reserved, and first one is used for
	* non-standard blksz of 4096 bytes that we don't support
	* yet. So clear the DMA boundary bits.
	*/
	ret &= (~SDHCI_MAKE_BLKSZ(0x7, 0));
	}
	return ret;
	}

	static u32 esdhc_writeb_fixup(struct sdhci_host *host,
	int spec_reg, u8 value, u32 old_value)
	{
	u32 ret;
	u32 dma_bits;
	u8 tmp;
	int shift = (spec_reg & 0x3) * 8;

	/*
	* eSDHC doesn't have a standard power control register, so we do
	* nothing here to avoid incorrect operation.
	*/
	if (spec_reg == SDHCI_POWER_CONTROL)
	return old_value;
	/*
	* "DMA select" location is offset 0x28 in SD specification, but on
	* P5020 or P3041, it's located at 0x29.
	*/
	if (spec_reg == SDHCI_HOST_CONTROL) {
	/*
	* If host control register is not standard, exit
	* this function
	*/
	if (host->quirks2 & SDHCI_QUIRK2_BROKEN_HOST_CONTROL)
	return old_value;

	/* DMA select is 22,23 bits in Protocol Control Register */
	dma_bits = (value & SDHCI_CTRL_DMA_MASK) << 5;
	ret = (old_value & (~(SDHCI_CTRL_DMA_MASK << 5))) \| dma_bits;
	tmp = (value & (~SDHCI_CTRL_DMA_MASK)) \|
	(old_value & SDHCI_CTRL_DMA_MASK);
	ret = (ret & (~0xff)) \| tmp;

	/* Prevent SDHCI core from writing reserved bits (e.g. HISPD) */
	ret &= ~ESDHC_HOST_CONTROL_RES;
	return ret;
	}

	ret = (old_value & (~(0xff << shift))) \| (value << shift);
	return ret;
	}

	static u32 esdhc_be_readl(struct sdhci_host *host, int reg)
	{
	u32 ret;
	u32 value;

	value = ioread32be(host->ioaddr + reg);
	ret = esdhc_readl_fixup(host, reg, value);

	return ret;
	}

	static u32 esdhc_le_readl(struct sdhci_host *host, int reg)
	{
	u32 ret;
	u32 value;

	value = ioread32(host->ioaddr + reg);
	ret = esdhc_readl_fixup(host, reg, value);

	return ret;
	}

	static u16 esdhc_be_readw(struct sdhci_host *host, int reg)
	{
	u16 ret;
	u32 value;
	int base = reg & ~0x3;

	value = ioread32be(host->ioaddr + base);
	ret = esdhc_readw_fixup(host, reg, value);
	return ret;
	}

	static u16 esdhc_le_readw(struct sdhci_host *host, int reg)
	{
	u16 ret;
	u32 value;
	int base = reg & ~0x3;

	value = ioread32(host->ioaddr + base);
	ret = esdhc_readw_fixup(host, reg, value);
	return ret;
	}

	static u8 esdhc_be_readb(struct sdhci_host *host, int reg)
	{
	u8 ret;
	u32 value;
	int base = reg & ~0x3;

	value = ioread32be(host->ioaddr + base);
	ret = esdhc_readb_fixup(host, reg, value);
	return ret;
	}

	static u8 esdhc_le_readb(struct sdhci_host *host, int reg)
	{
	u8 ret;
	u32 value;
	int base = reg & ~0x3;

	value = ioread32(host->ioaddr + base);
	ret = esdhc_readb_fixup(host, reg, value);
	return ret;
	}

	static void esdhc_be_writel(struct sdhci_host *host, u32 val, int reg)
	{
	u32 value;

	value = esdhc_writel_fixup(host, reg, val, 0);
	iowrite32be(value, host->ioaddr + reg);
	}

	static void esdhc_le_writel(struct sdhci_host *host, u32 val, int reg)
	{
	u32 value;

	value = esdhc_writel_fixup(host, reg, val, 0);
	iowrite32(value, host->ioaddr + reg);
	}

	static void esdhc_be_writew(struct sdhci_host *host, u16 val, int reg)
	{
	int base = reg & ~0x3;
	u32 value;
	u32 ret;

	value = ioread32be(host->ioaddr + base);
	ret = esdhc_writew_fixup(host, reg, val, value);
	if (reg != SDHCI_TRANSFER_MODE)
	iowrite32be(ret, host->ioaddr + base);
	}

	static void esdhc_le_writew(struct sdhci_host *host, u16 val, int reg)
	{
	int base = reg & ~0x3;
	u32 value;
	u32 ret;

	value = ioread32(host->ioaddr + base);
	ret = esdhc_writew_fixup(host, reg, val, value);
	if (reg != SDHCI_TRANSFER_MODE)
	iowrite32(ret, host->ioaddr + base);
	}

	static void esdhc_be_writeb(struct sdhci_host *host, u8 val, int reg)
	{
	int base = reg & ~0x3;
	u32 value;
	u32 ret;

	value = ioread32be(host->ioaddr + base);
	ret = esdhc_writeb_fixup(host, reg, val, value);
	iowrite32be(ret, host->ioaddr + base);
	}

	static void esdhc_le_writeb(struct sdhci_host *host, u8 val, int reg)
	{
	int base = reg & ~0x3;
	u32 value;
	u32 ret;

	value = ioread32(host->ioaddr + base);
	ret = esdhc_writeb_fixup(host, reg, val, value);
	iowrite32(ret, host->ioaddr + base);
	}

	/*
	* For Abort or Suspend after Stop at Block Gap, ignore the ADMA
	* error(IRQSTAT[ADMAE]) if both Transfer Complete(IRQSTAT[TC])
	* and Block Gap Event(IRQSTAT[BGE]) are also set.
	* For Continue, apply soft reset for data(SYSCTL[RSTD]);
	* and re-issue the entire read transaction from beginning.
	*/
	static void esdhc_of_adma_workaround(struct sdhci_host *host, u32 intmask)
	{
	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
	struct sdhci_esdhc *esdhc = sdhci_pltfm_priv(pltfm_host);
	bool applicable;
	dma_addr_t dmastart;
	dma_addr_t dmanow;

	applicable = (intmask & SDHCI_INT_DATA_END) &&
	(intmask & SDHCI_INT_BLK_GAP) &&
	(esdhc->vendor_ver == VENDOR_V_23);
	if (!applicable)
	return;

	host->data->error = 0;
	dmastart = sg_dma_address(host->data->sg);
	dmanow = dmastart + host->data->bytes_xfered;
	/*
	* Force update to the next DMA block boundary.
	*/
	dmanow = (dmanow & ~(SDHCI_DEFAULT_BOUNDARY_SIZE - 1)) +
	SDHCI_DEFAULT_BOUNDARY_SIZE;
	host->data->bytes_xfered = dmanow - dmastart;
	sdhci_writel(host, dmanow, SDHCI_DMA_ADDRESS);
	}

	static int esdhc_of_enable_dma(struct sdhci_host *host)
	{
	u32 value;

	value = sdhci_readl(host, ESDHC_DMA_SYSCTL);
	value \|= ESDHC_DMA_SNOOP;
	sdhci_writel(host, value, ESDHC_DMA_SYSCTL);
	return 0;
	}

	static unsigned int esdhc_of_get_max_clock(struct sdhci_host *host)
	{
	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);

	return pltfm_host->clock;
	}

	static unsigned int esdhc_of_get_min_clock(struct sdhci_host *host)
	{
	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);

	return pltfm_host->clock / 256 / 16;
	}

	static void esdhc_of_set_clock(struct sdhci_host *host, unsigned int clock)
	{
	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
	struct sdhci_esdhc *esdhc = sdhci_pltfm_priv(pltfm_host);
	int pre_div = 1;
	int div = 1;
	u32 temp;

	host->mmc->actual_clock = 0;

	if (clock == 0)
	return;

	/* Workaround to start pre_div at 2 for VNN < VENDOR_V_23 */
	if (esdhc->vendor_ver < VENDOR_V_23)
	pre_div = 2;

	/* Workaround to reduce the clock frequency for p1010 esdhc */
	if (of_find_compatible_node(NULL, NULL, "fsl,p1010-esdhc")) {
	if (clock > 20000000)
	clock -= 5000000;
	if (clock > 40000000)
	clock -= 5000000;
	}

	temp = sdhci_readl(host, ESDHC_SYSTEM_CONTROL);
	temp &= ~(ESDHC_CLOCK_IPGEN \| ESDHC_CLOCK_HCKEN \| ESDHC_CLOCK_PEREN
	\| ESDHC_CLOCK_MASK);
	sdhci_writel(host, temp, ESDHC_SYSTEM_CONTROL);

	while (host->max_clk / pre_div / 16 > clock && pre_div < 256)
	pre_div *= 2;

	while (host->max_clk / pre_div / div > clock && div < 16)
	div++;

	dev_dbg(mmc_dev(host->mmc), "desired SD clock: %d, actual: %d\n",
	clock, host->max_clk / pre_div / div);
	host->mmc->actual_clock = host->max_clk / pre_div / div;
	pre_div >>= 1;
	div--;

	temp = sdhci_readl(host, ESDHC_SYSTEM_CONTROL);
	temp \|= (ESDHC_CLOCK_IPGEN \| ESDHC_CLOCK_HCKEN \| ESDHC_CLOCK_PEREN
	\| (div << ESDHC_DIVIDER_SHIFT)
	\| (pre_div << ESDHC_PREDIV_SHIFT));
	sdhci_writel(host, temp, ESDHC_SYSTEM_CONTROL);
	mdelay(1);
	}

	static void esdhc_pltfm_set_bus_width(struct sdhci_host *host, int width)
	{
	u32 ctrl;

	ctrl = sdhci_readl(host, ESDHC_PROCTL);
	ctrl &= (~ESDHC_CTRL_BUSWIDTH_MASK);
	switch (width) {
	case MMC_BUS_WIDTH_8:
	ctrl \|= ESDHC_CTRL_8BITBUS;
	break;

	case MMC_BUS_WIDTH_4:
	ctrl \|= ESDHC_CTRL_4BITBUS;
	break;

	default:
	break;
	}

	sdhci_writel(host, ctrl, ESDHC_PROCTL);
	}

	static void esdhc_reset(struct sdhci_host *host, u8 mask)
	{
	sdhci_reset(host, mask);

	sdhci_writel(host, host->ier, SDHCI_INT_ENABLE);
	sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE);
	}

	#ifdef CONFIG_PM_SLEEP
	static u32 esdhc_proctl;
	static int esdhc_of_suspend(struct device *dev)
	{
	struct sdhci_host *host = dev_get_drvdata(dev);

	esdhc_proctl = sdhci_readl(host, SDHCI_HOST_CONTROL);

	return sdhci_suspend_host(host);
	}

	static int esdhc_of_resume(struct device *dev)
	{
	struct sdhci_host *host = dev_get_drvdata(dev);
	int ret = sdhci_resume_host(host);

	if (ret == 0) {
	/* Isn't this already done by sdhci_resume_host() ? --rmk */
	esdhc_of_enable_dma(host);
	sdhci_writel(host, esdhc_proctl, SDHCI_HOST_CONTROL);
	}
	return ret;
	}
	#endif

	static SIMPLE_DEV_PM_OPS(esdhc_of_dev_pm_ops,
	esdhc_of_suspend,
	esdhc_of_resume);

	static const struct sdhci_ops sdhci_esdhc_be_ops = {
	.read_l = esdhc_be_readl,
	.read_w = esdhc_be_readw,
	.read_b = esdhc_be_readb,
	.write_l = esdhc_be_writel,
	.write_w = esdhc_be_writew,
	.write_b = esdhc_be_writeb,
	.set_clock = esdhc_of_set_clock,
	.enable_dma = esdhc_of_enable_dma,
	.get_max_clock = esdhc_of_get_max_clock,
	.get_min_clock = esdhc_of_get_min_clock,
	.adma_workaround = esdhc_of_adma_workaround,
	.set_bus_width = esdhc_pltfm_set_bus_width,
	.reset = esdhc_reset,
	.set_uhs_signaling = sdhci_set_uhs_signaling,
	};

	static const struct sdhci_ops sdhci_esdhc_le_ops = {
	.read_l = esdhc_le_readl,
	.read_w = esdhc_le_readw,
	.read_b = esdhc_le_readb,
	.write_l = esdhc_le_writel,
	.write_w = esdhc_le_writew,
	.write_b = esdhc_le_writeb,
	.set_clock = esdhc_of_set_clock,
	.enable_dma = esdhc_of_enable_dma,
	.get_max_clock = esdhc_of_get_max_clock,
	.get_min_clock = esdhc_of_get_min_clock,
	.adma_workaround = esdhc_of_adma_workaround,
	.set_bus_width = esdhc_pltfm_set_bus_width,
	.reset = esdhc_reset,
	.set_uhs_signaling = sdhci_set_uhs_signaling,
	};

	static const struct sdhci_pltfm_data sdhci_esdhc_be_pdata = {
	.quirks = ESDHC_DEFAULT_QUIRKS \|
	#ifdef CONFIG_PPC
	SDHCI_QUIRK_BROKEN_CARD_DETECTION \|
	#endif
	SDHCI_QUIRK_NO_CARD_NO_RESET \|
	SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
	.ops = &sdhci_esdhc_be_ops,
	};

	static const struct sdhci_pltfm_data sdhci_esdhc_le_pdata = {
	.quirks = ESDHC_DEFAULT_QUIRKS \|
	SDHCI_QUIRK_NO_CARD_NO_RESET \|
	SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
	.ops = &sdhci_esdhc_le_ops,
	};

	static struct soc_device_attribute soc_incorrect_hostver[] = {
	{ .family = "QorIQ T4240", .revision = "1.0", },
	{ .family = "QorIQ T4240", .revision = "2.0", },
	{ },
	};

	static void esdhc_init(struct platform_device pdev, struct sdhci_host host)
	{
	struct sdhci_pltfm_host *pltfm_host;
	struct sdhci_esdhc *esdhc;
	u16 host_ver;

	pltfm_host = sdhci_priv(host);
	esdhc = sdhci_pltfm_priv(pltfm_host);

	host_ver = sdhci_readw(host, SDHCI_HOST_VERSION);
	esdhc->vendor_ver = (host_ver & SDHCI_VENDOR_VER_MASK) >>
	SDHCI_VENDOR_VER_SHIFT;
	esdhc->spec_ver = host_ver & SDHCI_SPEC_VER_MASK;
	if (soc_device_match(soc_incorrect_hostver))
	esdhc->quirk_incorrect_hostver = true;
	else
	esdhc->quirk_incorrect_hostver = false;
	}

	static int sdhci_esdhc_probe(struct platform_device *pdev)
	{
	struct sdhci_host *host;
	struct device_node *np;
	struct sdhci_pltfm_host *pltfm_host;
	struct sdhci_esdhc *esdhc;
	int ret;

	np = pdev->dev.of_node;

	if (of_property_read_bool(np, "little-endian"))
	host = sdhci_pltfm_init(pdev, &sdhci_esdhc_le_pdata,
	sizeof(struct sdhci_esdhc));
	else
	host = sdhci_pltfm_init(pdev, &sdhci_esdhc_be_pdata,
	sizeof(struct sdhci_esdhc));

	if (IS_ERR(host))
	return PTR_ERR(host);

	esdhc_init(pdev, host);

	sdhci_get_of_property(pdev);

	pltfm_host = sdhci_priv(host);
	esdhc = sdhci_pltfm_priv(pltfm_host);
	if (esdhc->vendor_ver == VENDOR_V_22)
	host->quirks2 \|= SDHCI_QUIRK2_HOST_NO_CMD23;

	if (esdhc->vendor_ver > VENDOR_V_22)
	host->quirks &= ~SDHCI_QUIRK_NO_BUSY_IRQ;

	if (of_device_is_compatible(np, "fsl,p5040-esdhc") \|\|
	of_device_is_compatible(np, "fsl,p5020-esdhc") \|\|
	of_device_is_compatible(np, "fsl,p4080-esdhc") \|\|
	of_device_is_compatible(np, "fsl,p1020-esdhc") \|\|
	of_device_is_compatible(np, "fsl,t1040-esdhc"))
	host->quirks &= ~SDHCI_QUIRK_BROKEN_CARD_DETECTION;

	if (of_device_is_compatible(np, "fsl,ls1021a-esdhc"))
	host->quirks \|= SDHCI_QUIRK_BROKEN_TIMEOUT_VAL;

	if (of_device_is_compatible(np, "fsl,p2020-esdhc")) {
	/*
	* Freescale messed up with P2020 as it has a non-standard
	* host control register
	*/
	host->quirks2 \|= SDHCI_QUIRK2_BROKEN_HOST_CONTROL;
	}

	/* call to generic mmc_of_parse to support additional capabilities */
	ret = mmc_of_parse(host->mmc);
	if (ret)
	goto err;

	mmc_of_parse_voltage(np, &host->ocr_mask);

	ret = sdhci_add_host(host);
	if (ret)
	goto err;

	return 0;
	err:
	sdhci_pltfm_free(pdev);
	return ret;
	}

	static const struct of_device_id sdhci_esdhc_of_match[] = {
	{ .compatible = "fsl,mpc8379-esdhc" },
	{ .compatible = "fsl,mpc8536-esdhc" },
	{ .compatible = "fsl,esdhc" },
	{ }
	};
	MODULE_DEVICE_TABLE(of, sdhci_esdhc_of_match);

	static struct platform_driver sdhci_esdhc_driver = {
	.driver = {
	.name = "sdhci-esdhc",
	.of_match_table = sdhci_esdhc_of_match,
	.pm = &esdhc_of_dev_pm_ops,
	},
	.probe = sdhci_esdhc_probe,
	.remove = sdhci_pltfm_unregister,
	};

	module_platform_driver(sdhci_esdhc_driver);

	MODULE_DESCRIPTION("SDHCI OF driver for Freescale MPC eSDHC");
	MODULE_AUTHOR("Xiaobo Xie <X.Xie@freescale.com>, "
	"Anton Vorontsov <avorontsov@ru.mvista.com>");
	MODULE_LICENSE("GPL v2");