arch/arm/mach-omap2/mmc-twl4030.c - kernel/msm - Gitiles

 /*
  * linux/arch/arm/mach-omap2/mmc-twl4030.c
  *
  * Copyright (C) 2007-2008 Texas Instruments
  * Copyright (C) 2008 Nokia Corporation
  * Author: Texas Instruments
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  */
 #include <linux/err.h>
 #include <linux/io.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/interrupt.h>
 #include <linux/delay.h>
 #include <linux/gpio.h>
 #include <linux/mmc/host.h>
 #include <linux/regulator/consumer.h>

 #include <mach/hardware.h>
 #include <mach/control.h>
 #include <mach/mmc.h>
 #include <mach/board.h>

 #include "mmc-twl4030.h"


 #if defined(CONFIG_REGULATOR) && \
 	(defined(CONFIG_MMC_OMAP_HS) || defined(CONFIG_MMC_OMAP_HS_MODULE))

 static u16 control_pbias_offset;
 static u16 control_devconf1_offset;

 #define HSMMC_NAME_LEN	9

 static struct twl_mmc_controller {
 	struct omap_mmc_platform_data	*mmc;
 	/* Vcc == configured supply
 	 * Vcc_alt == optional
 	 *   -	MMC1, supply for DAT4..DAT7
 	 *   -	MMC2/MMC2, external level shifter voltage supply, for
 	 *	chip (SDIO, eMMC, etc) or transceiver (MMC2 only)
 	 */
 	struct regulator		*vcc;
 	struct regulator		*vcc_aux;
 	char				name[HSMMC_NAME_LEN + 1];
 } hsmmc[OMAP34XX_NR_MMC];

 static int twl_mmc_card_detect(int irq)
 {
 	unsigned i;

 	for (i = 0; i < ARRAY_SIZE(hsmmc); i++) {
 		struct omap_mmc_platform_data *mmc;

 		mmc = hsmmc[i].mmc;
 		if (!mmc)
 			continue;
 		if (irq != mmc->slots[0].card_detect_irq)
 			continue;

 		/* NOTE: assumes card detect signal is active-low */
 		return !gpio_get_value_cansleep(mmc->slots[0].switch_pin);
 	}
 	return -ENOSYS;
 }

 static int twl_mmc_get_ro(struct device *dev, int slot)
 {
 	struct omap_mmc_platform_data *mmc = dev->platform_data;

 	/* NOTE: assumes write protect signal is active-high */
 	return gpio_get_value_cansleep(mmc->slots[0].gpio_wp);
 }

 static int twl_mmc_get_cover_state(struct device *dev, int slot)
 {
 	struct omap_mmc_platform_data *mmc = dev->platform_data;

 	/* NOTE: assumes card detect signal is active-low */
 	return !gpio_get_value_cansleep(mmc->slots[0].switch_pin);
 }

 /*
  * MMC Slot Initialization.
  */
 static int twl_mmc_late_init(struct device *dev)
 {
 	struct omap_mmc_platform_data *mmc = dev->platform_data;
 	int ret = 0;
 	int i;

 	/* MMC/SD/SDIO doesn't require a card detect switch */
 	if (gpio_is_valid(mmc->slots[0].switch_pin)) {
 		ret = gpio_request(mmc->slots[0].switch_pin, "mmc_cd");
 		if (ret)
 			goto done;
 		ret = gpio_direction_input(mmc->slots[0].switch_pin);
 		if (ret)
 			goto err;
 	}

 	/* require at least main regulator */
 	for (i = 0; i < ARRAY_SIZE(hsmmc); i++) {
 		if (hsmmc[i].name == mmc->slots[0].name) {
 			struct regulator *reg;

 			hsmmc[i].mmc = mmc;

 			reg = regulator_get(dev, "vmmc");
 			if (IS_ERR(reg)) {
 				dev_dbg(dev, "vmmc regulator missing\n");
 				/* HACK: until fixed.c regulator is usable,
 				 * we don't require a main regulator
 				 * for MMC2 or MMC3
 				 */
 				if (i != 0)
 					break;
 				ret = PTR_ERR(reg);
 				hsmmc[i].vcc = NULL;
 				goto err;
 			}
 			hsmmc[i].vcc = reg;
 			mmc->slots[0].ocr_mask = mmc_regulator_get_ocrmask(reg);

 			/* allow an aux regulator */
 			reg = regulator_get(dev, "vmmc_aux");
 			hsmmc[i].vcc_aux = IS_ERR(reg) ? NULL : reg;

 			/* UGLY HACK:  workaround regulator framework bugs.
 			 * When the bootloader leaves a supply active, it's
 			 * initialized with zero usecount ... and we can't
 			 * disable it without first enabling it.  Until the
 			 * framework is fixed, we need a workaround like this
 			 * (which is safe for MMC, but not in general).
 			 */
 			if (regulator_is_enabled(hsmmc[i].vcc) > 0) {
 				regulator_enable(hsmmc[i].vcc);
 				regulator_disable(hsmmc[i].vcc);
 			}
 			if (hsmmc[i].vcc_aux) {
 				if (regulator_is_enabled(reg) > 0) {
 					regulator_enable(reg);
 					regulator_disable(reg);
 				}
 			}

 			break;
 		}
 	}

 	return 0;

 err:
 	gpio_free(mmc->slots[0].switch_pin);
 done:
 	mmc->slots[0].card_detect_irq = 0;
 	mmc->slots[0].card_detect = NULL;

 	dev_err(dev, "err %d configuring card detect\n", ret);
 	return ret;
 }

 static void twl_mmc_cleanup(struct device *dev)
 {
 	struct omap_mmc_platform_data *mmc = dev->platform_data;
 	int i;

 	gpio_free(mmc->slots[0].switch_pin);
 	for(i = 0; i < ARRAY_SIZE(hsmmc); i++) {
 		regulator_put(hsmmc[i].vcc);
 		regulator_put(hsmmc[i].vcc_aux);
 	}
 }

 #ifdef CONFIG_PM

 static int twl_mmc_suspend(struct device *dev, int slot)
 {
 	struct omap_mmc_platform_data *mmc = dev->platform_data;

 	disable_irq(mmc->slots[0].card_detect_irq);
 	return 0;
 }

 static int twl_mmc_resume(struct device *dev, int slot)
 {
 	struct omap_mmc_platform_data *mmc = dev->platform_data;

 	enable_irq(mmc->slots[0].card_detect_irq);
 	return 0;
 }

 #else
 #define twl_mmc_suspend	NULL
 #define twl_mmc_resume	NULL
 #endif

 #if defined(CONFIG_ARCH_OMAP3) && defined(CONFIG_PM)

 static int twl4030_mmc_get_context_loss(struct device *dev)
 {
 	/* FIXME: PM DPS not implemented yet */
 	return 0;
 }

 #else
 #define twl4030_mmc_get_context_loss NULL
 #endif

 static int twl_mmc1_set_power(struct device *dev, int slot, int power_on,
 				int vdd)
 {
 	u32 reg;
 	int ret = 0;
 	struct twl_mmc_controller *c = &hsmmc[0];
 	struct omap_mmc_platform_data *mmc = dev->platform_data;

 	/*
 	 * Assume we power both OMAP VMMC1 (for CMD, CLK, DAT0..3) and the
 	 * card with Vcc regulator (from twl4030 or whatever).  OMAP has both
 	 * 1.8V and 3.0V modes, controlled by the PBIAS register.
 	 *
 	 * In 8-bit modes, OMAP VMMC1A (for DAT4..7) needs a supply, which
 	 * is most naturally TWL VSIM; those pins also use PBIAS.
 	 *
 	 * FIXME handle VMMC1A as needed ...
 	 */
 	if (power_on) {
 		if (cpu_is_omap2430()) {
 			reg = omap_ctrl_readl(OMAP243X_CONTROL_DEVCONF1);
 			if ((1 << vdd) >= MMC_VDD_30_31)
 				reg |= OMAP243X_MMC1_ACTIVE_OVERWRITE;
 			else
 				reg &= ~OMAP243X_MMC1_ACTIVE_OVERWRITE;
 			omap_ctrl_writel(reg, OMAP243X_CONTROL_DEVCONF1);
 		}

 		if (mmc->slots[0].internal_clock) {
 			reg = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0);
 			reg |= OMAP2_MMCSDIO1ADPCLKISEL;
 			omap_ctrl_writel(reg, OMAP2_CONTROL_DEVCONF0);
 		}

 		reg = omap_ctrl_readl(control_pbias_offset);
 		reg |= OMAP2_PBIASSPEEDCTRL0;
 		reg &= ~OMAP2_PBIASLITEPWRDNZ0;
 		omap_ctrl_writel(reg, control_pbias_offset);

 		ret = mmc_regulator_set_ocr(c->vcc, vdd);

 		/* 100ms delay required for PBIAS configuration */
 		msleep(100);
 		reg = omap_ctrl_readl(control_pbias_offset);
 		reg |= (OMAP2_PBIASLITEPWRDNZ0 | OMAP2_PBIASSPEEDCTRL0);
 		if ((1 << vdd) <= MMC_VDD_165_195)
 			reg &= ~OMAP2_PBIASLITEVMODE0;
 		else
 			reg |= OMAP2_PBIASLITEVMODE0;
 		omap_ctrl_writel(reg, control_pbias_offset);
 	} else {
 		reg = omap_ctrl_readl(control_pbias_offset);
 		reg &= ~OMAP2_PBIASLITEPWRDNZ0;
 		omap_ctrl_writel(reg, control_pbias_offset);

 		ret = mmc_regulator_set_ocr(c->vcc, 0);

 		/* 100ms delay required for PBIAS configuration */
 		msleep(100);
 		reg = omap_ctrl_readl(control_pbias_offset);
 		reg |= (OMAP2_PBIASSPEEDCTRL0 | OMAP2_PBIASLITEPWRDNZ0 |
 			OMAP2_PBIASLITEVMODE0);
 		omap_ctrl_writel(reg, control_pbias_offset);
 	}

 	return ret;
 }

 static int twl_mmc23_set_power(struct device *dev, int slot, int power_on, int vdd)
 {
 	int ret = 0;
 	struct twl_mmc_controller *c = NULL;
 	struct omap_mmc_platform_data *mmc = dev->platform_data;
 	int i;

 	for (i = 1; i < ARRAY_SIZE(hsmmc); i++) {
 		if (mmc == hsmmc[i].mmc) {
 			c = &hsmmc[i];
 			break;
 		}
 	}

 	if (c == NULL)
 		return -ENODEV;

 	/* If we don't see a Vcc regulator, assume it's a fixed
 	 * voltage always-on regulator.
 	 */
 	if (!c->vcc)
 		return 0;

 	/*
 	 * Assume Vcc regulator is used only to power the card ... OMAP
 	 * VDDS is used to power the pins, optionally with a transceiver to
 	 * support cards using voltages other than VDDS (1.8V nominal).  When a
 	 * transceiver is used, DAT3..7 are muxed as transceiver control pins.
 	 *
 	 * In some cases this regulator won't support enable/disable;
 	 * e.g. it's a fixed rail for a WLAN chip.
 	 *
 	 * In other cases vcc_aux switches interface power.  Example, for
 	 * eMMC cards it represents VccQ.  Sometimes transceivers or SDIO
 	 * chips/cards need an interface voltage rail too.
 	 */
 	if (power_on) {
 		/* only MMC2 supports a CLKIN */
 		if (mmc->slots[0].internal_clock) {
 			u32 reg;

 			reg = omap_ctrl_readl(control_devconf1_offset);
 			reg |= OMAP2_MMCSDIO2ADPCLKISEL;
 			omap_ctrl_writel(reg, control_devconf1_offset);
 		}
 		ret = mmc_regulator_set_ocr(c->vcc, vdd);
 		/* enable interface voltage rail, if needed */
 		if (ret == 0 && c->vcc_aux) {
 			ret = regulator_enable(c->vcc_aux);
 			if (ret < 0)
 				ret = mmc_regulator_set_ocr(c->vcc, 0);
 		}
 	} else {
 		if (c->vcc_aux && (ret = regulator_is_enabled(c->vcc_aux)) > 0)
 			ret = regulator_disable(c->vcc_aux);
 		if (ret == 0)
 			ret = mmc_regulator_set_ocr(c->vcc, 0);
 	}

 	return ret;
 }

 static struct omap_mmc_platform_data *hsmmc_data[OMAP34XX_NR_MMC] __initdata;

 void __init twl4030_mmc_init(struct twl4030_hsmmc_info *controllers)
 {
 	struct twl4030_hsmmc_info *c;
 	int nr_hsmmc = ARRAY_SIZE(hsmmc_data);

 	if (cpu_is_omap2430()) {
 		control_pbias_offset = OMAP243X_CONTROL_PBIAS_LITE;
 		control_devconf1_offset = OMAP243X_CONTROL_DEVCONF1;
 		nr_hsmmc = 2;
 	} else {
 		control_pbias_offset = OMAP343X_CONTROL_PBIAS_LITE;
 		control_devconf1_offset = OMAP343X_CONTROL_DEVCONF1;
 	}

 	for (c = controllers; c->mmc; c++) {
 		struct twl_mmc_controller *twl = hsmmc + c->mmc - 1;
 		struct omap_mmc_platform_data *mmc = hsmmc_data[c->mmc - 1];

 		if (!c->mmc || c->mmc > nr_hsmmc) {
 			pr_debug("MMC%d: no such controller\n", c->mmc);
 			continue;
 		}
 		if (mmc) {
 			pr_debug("MMC%d: already configured\n", c->mmc);
 			continue;
 		}

 		mmc = kzalloc(sizeof(struct omap_mmc_platform_data), GFP_KERNEL);
 		if (!mmc) {
 			pr_err("Cannot allocate memory for mmc device!\n");
 			return;
 		}

 		if (c->name)
 			strncpy(twl->name, c->name, HSMMC_NAME_LEN);
 		else
 			snprintf(twl->name, ARRAY_SIZE(twl->name),
 				"mmc%islot%i", c->mmc, 1);
 		mmc->slots[0].name = twl->name;
 		mmc->nr_slots = 1;
 		mmc->slots[0].wires = c->wires;
 		mmc->slots[0].internal_clock = !c->ext_clock;
 		mmc->dma_mask = 0xffffffff;
 		mmc->init = twl_mmc_late_init;

 		/* note: twl4030 card detect GPIOs can disable VMMCx ... */
 		if (gpio_is_valid(c->gpio_cd)) {
 			mmc->cleanup = twl_mmc_cleanup;
 			mmc->suspend = twl_mmc_suspend;
 			mmc->resume = twl_mmc_resume;

 			mmc->slots[0].switch_pin = c->gpio_cd;
 			mmc->slots[0].card_detect_irq = gpio_to_irq(c->gpio_cd);
 			if (c->cover_only)
 				mmc->slots[0].get_cover_state = twl_mmc_get_cover_state;
 			else
 				mmc->slots[0].card_detect = twl_mmc_card_detect;
 		} else
 			mmc->slots[0].switch_pin = -EINVAL;

 		mmc->get_context_loss_count =
 				twl4030_mmc_get_context_loss;

 		/* write protect normally uses an OMAP gpio */
 		if (gpio_is_valid(c->gpio_wp)) {
 			gpio_request(c->gpio_wp, "mmc_wp");
 			gpio_direction_input(c->gpio_wp);

 			mmc->slots[0].gpio_wp = c->gpio_wp;
 			mmc->slots[0].get_ro = twl_mmc_get_ro;
 		} else
 			mmc->slots[0].gpio_wp = -EINVAL;

 		if (c->nonremovable)
 			mmc->slots[0].nonremovable = 1;

 		if (c->power_saving)
 			mmc->slots[0].power_saving = 1;

 		/* NOTE:  MMC slots should have a Vcc regulator set up.
 		 * This may be from a TWL4030-family chip, another
 		 * controllable regulator, or a fixed supply.
 		 *
 		 * temporary HACK: ocr_mask instead of fixed supply
 		 */
 		mmc->slots[0].ocr_mask = c->ocr_mask;

 		switch (c->mmc) {
 		case 1:
 			/* on-chip level shifting via PBIAS0/PBIAS1 */
 			mmc->slots[0].set_power = twl_mmc1_set_power;
 			break;
 		case 2:
 			if (c->ext_clock)
 				c->transceiver = 1;
 			if (c->transceiver && c->wires > 4)
 				c->wires = 4;
 			/* FALLTHROUGH */
 		case 3:
 			/* off-chip level shifting, or none */
 			mmc->slots[0].set_power = twl_mmc23_set_power;
 			break;
 		default:
 			pr_err("MMC%d configuration not supported!\n", c->mmc);
 			kfree(mmc);
 			continue;
 		}
 		hsmmc_data[c->mmc - 1] = mmc;
 	}

 	omap2_init_mmc(hsmmc_data, OMAP34XX_NR_MMC);

 	/* pass the device nodes back to board setup code */
 	for (c = controllers; c->mmc; c++) {
 		struct omap_mmc_platform_data *mmc = hsmmc_data[c->mmc - 1];

 		if (!c->mmc || c->mmc > nr_hsmmc)
 			continue;
 		c->dev = mmc->dev;
 	}
 }

 #endif
	/*
	* linux/arch/arm/mach-omap2/mmc-twl4030.c
	*
	* Copyright (C) 2007-2008 Texas Instruments
	* Copyright (C) 2008 Nokia Corporation
	* Author: Texas Instruments
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License version 2 as
	* published by the Free Software Foundation.
	*/
	#include <linux/err.h>
	#include <linux/io.h>
	#include <linux/module.h>
	#include <linux/platform_device.h>
	#include <linux/interrupt.h>
	#include <linux/delay.h>
	#include <linux/gpio.h>
	#include <linux/mmc/host.h>
	#include <linux/regulator/consumer.h>

	#include <mach/hardware.h>
	#include <mach/control.h>
	#include <mach/mmc.h>
	#include <mach/board.h>

	#include "mmc-twl4030.h"


	#if defined(CONFIG_REGULATOR) && \
	(defined(CONFIG_MMC_OMAP_HS) \|\| defined(CONFIG_MMC_OMAP_HS_MODULE))

	static u16 control_pbias_offset;
	static u16 control_devconf1_offset;

	#define HSMMC_NAME_LEN 9

	static struct twl_mmc_controller {
	struct omap_mmc_platform_data *mmc;
	/* Vcc == configured supply
	* Vcc_alt == optional
	* - MMC1, supply for DAT4..DAT7
	* - MMC2/MMC2, external level shifter voltage supply, for
	* chip (SDIO, eMMC, etc) or transceiver (MMC2 only)
	*/
	struct regulator *vcc;
	struct regulator *vcc_aux;
	char name[HSMMC_NAME_LEN + 1];
	} hsmmc[OMAP34XX_NR_MMC];

	static int twl_mmc_card_detect(int irq)
	{
	unsigned i;

	for (i = 0; i < ARRAY_SIZE(hsmmc); i++) {
	struct omap_mmc_platform_data *mmc;

	mmc = hsmmc[i].mmc;
	if (!mmc)
	continue;
	if (irq != mmc->slots[0].card_detect_irq)
	continue;

	/* NOTE: assumes card detect signal is active-low */
	return !gpio_get_value_cansleep(mmc->slots[0].switch_pin);
	}
	return -ENOSYS;
	}

	static int twl_mmc_get_ro(struct device *dev, int slot)
	{
	struct omap_mmc_platform_data *mmc = dev->platform_data;

	/* NOTE: assumes write protect signal is active-high */
	return gpio_get_value_cansleep(mmc->slots[0].gpio_wp);
	}

	static int twl_mmc_get_cover_state(struct device *dev, int slot)
	{
	struct omap_mmc_platform_data *mmc = dev->platform_data;

	/* NOTE: assumes card detect signal is active-low */
	return !gpio_get_value_cansleep(mmc->slots[0].switch_pin);
	}

	/*
	* MMC Slot Initialization.
	*/
	static int twl_mmc_late_init(struct device *dev)
	{
	struct omap_mmc_platform_data *mmc = dev->platform_data;
	int ret = 0;
	int i;

	/* MMC/SD/SDIO doesn't require a card detect switch */
	if (gpio_is_valid(mmc->slots[0].switch_pin)) {
	ret = gpio_request(mmc->slots[0].switch_pin, "mmc_cd");
	if (ret)
	goto done;
	ret = gpio_direction_input(mmc->slots[0].switch_pin);
	if (ret)
	goto err;
	}

	/* require at least main regulator */
	for (i = 0; i < ARRAY_SIZE(hsmmc); i++) {
	if (hsmmc[i].name == mmc->slots[0].name) {
	struct regulator *reg;

	hsmmc[i].mmc = mmc;

	reg = regulator_get(dev, "vmmc");
	if (IS_ERR(reg)) {
	dev_dbg(dev, "vmmc regulator missing\n");
	/* HACK: until fixed.c regulator is usable,
	* we don't require a main regulator
	* for MMC2 or MMC3
	*/
	if (i != 0)
	break;
	ret = PTR_ERR(reg);
	hsmmc[i].vcc = NULL;
	goto err;
	}
	hsmmc[i].vcc = reg;
	mmc->slots[0].ocr_mask = mmc_regulator_get_ocrmask(reg);

	/* allow an aux regulator */
	reg = regulator_get(dev, "vmmc_aux");
	hsmmc[i].vcc_aux = IS_ERR(reg) ? NULL : reg;

	/* UGLY HACK: workaround regulator framework bugs.
	* When the bootloader leaves a supply active, it's
	* initialized with zero usecount ... and we can't
	* disable it without first enabling it. Until the
	* framework is fixed, we need a workaround like this
	* (which is safe for MMC, but not in general).
	*/
	if (regulator_is_enabled(hsmmc[i].vcc) > 0) {
	regulator_enable(hsmmc[i].vcc);
	regulator_disable(hsmmc[i].vcc);
	}
	if (hsmmc[i].vcc_aux) {
	if (regulator_is_enabled(reg) > 0) {
	regulator_enable(reg);
	regulator_disable(reg);
	}
	}

	break;
	}
	}

	return 0;

	err:
	gpio_free(mmc->slots[0].switch_pin);
	done:
	mmc->slots[0].card_detect_irq = 0;
	mmc->slots[0].card_detect = NULL;

	dev_err(dev, "err %d configuring card detect\n", ret);
	return ret;
	}

	static void twl_mmc_cleanup(struct device *dev)
	{
	struct omap_mmc_platform_data *mmc = dev->platform_data;
	int i;

	gpio_free(mmc->slots[0].switch_pin);
	for(i = 0; i < ARRAY_SIZE(hsmmc); i++) {
	regulator_put(hsmmc[i].vcc);
	regulator_put(hsmmc[i].vcc_aux);
	}
	}

	#ifdef CONFIG_PM

	static int twl_mmc_suspend(struct device *dev, int slot)
	{
	struct omap_mmc_platform_data *mmc = dev->platform_data;

	disable_irq(mmc->slots[0].card_detect_irq);
	return 0;
	}

	static int twl_mmc_resume(struct device *dev, int slot)
	{
	struct omap_mmc_platform_data *mmc = dev->platform_data;

	enable_irq(mmc->slots[0].card_detect_irq);
	return 0;
	}

	#else
	#define twl_mmc_suspend NULL
	#define twl_mmc_resume NULL
	#endif

	#if defined(CONFIG_ARCH_OMAP3) && defined(CONFIG_PM)

	static int twl4030_mmc_get_context_loss(struct device *dev)
	{
	/* FIXME: PM DPS not implemented yet */
	return 0;
	}

	#else
	#define twl4030_mmc_get_context_loss NULL
	#endif

	static int twl_mmc1_set_power(struct device *dev, int slot, int power_on,
	int vdd)
	{
	u32 reg;
	int ret = 0;
	struct twl_mmc_controller *c = &hsmmc[0];
	struct omap_mmc_platform_data *mmc = dev->platform_data;

	/*
	* Assume we power both OMAP VMMC1 (for CMD, CLK, DAT0..3) and the
	* card with Vcc regulator (from twl4030 or whatever). OMAP has both
	* 1.8V and 3.0V modes, controlled by the PBIAS register.
	*
	* In 8-bit modes, OMAP VMMC1A (for DAT4..7) needs a supply, which
	* is most naturally TWL VSIM; those pins also use PBIAS.
	*
	* FIXME handle VMMC1A as needed ...
	*/
	if (power_on) {
	if (cpu_is_omap2430()) {
	reg = omap_ctrl_readl(OMAP243X_CONTROL_DEVCONF1);
	if ((1 << vdd) >= MMC_VDD_30_31)
	reg \|= OMAP243X_MMC1_ACTIVE_OVERWRITE;
	else
	reg &= ~OMAP243X_MMC1_ACTIVE_OVERWRITE;
	omap_ctrl_writel(reg, OMAP243X_CONTROL_DEVCONF1);
	}

	if (mmc->slots[0].internal_clock) {
	reg = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0);
	reg \|= OMAP2_MMCSDIO1ADPCLKISEL;
	omap_ctrl_writel(reg, OMAP2_CONTROL_DEVCONF0);
	}

	reg = omap_ctrl_readl(control_pbias_offset);
	reg \|= OMAP2_PBIASSPEEDCTRL0;
	reg &= ~OMAP2_PBIASLITEPWRDNZ0;
	omap_ctrl_writel(reg, control_pbias_offset);

	ret = mmc_regulator_set_ocr(c->vcc, vdd);

	/* 100ms delay required for PBIAS configuration */
	msleep(100);
	reg = omap_ctrl_readl(control_pbias_offset);
	reg \|= (OMAP2_PBIASLITEPWRDNZ0 \| OMAP2_PBIASSPEEDCTRL0);
	if ((1 << vdd) <= MMC_VDD_165_195)
	reg &= ~OMAP2_PBIASLITEVMODE0;
	else
	reg \|= OMAP2_PBIASLITEVMODE0;
	omap_ctrl_writel(reg, control_pbias_offset);
	} else {
	reg = omap_ctrl_readl(control_pbias_offset);
	reg &= ~OMAP2_PBIASLITEPWRDNZ0;
	omap_ctrl_writel(reg, control_pbias_offset);

	ret = mmc_regulator_set_ocr(c->vcc, 0);

	/* 100ms delay required for PBIAS configuration */
	msleep(100);
	reg = omap_ctrl_readl(control_pbias_offset);
	reg \|= (OMAP2_PBIASSPEEDCTRL0 \| OMAP2_PBIASLITEPWRDNZ0 \|
	OMAP2_PBIASLITEVMODE0);
	omap_ctrl_writel(reg, control_pbias_offset);
	}

	return ret;
	}

	static int twl_mmc23_set_power(struct device *dev, int slot, int power_on, int vdd)
	{
	int ret = 0;
	struct twl_mmc_controller *c = NULL;
	struct omap_mmc_platform_data *mmc = dev->platform_data;
	int i;

	for (i = 1; i < ARRAY_SIZE(hsmmc); i++) {
	if (mmc == hsmmc[i].mmc) {
	c = &hsmmc[i];
	break;
	}
	}

	if (c == NULL)
	return -ENODEV;

	/* If we don't see a Vcc regulator, assume it's a fixed
	* voltage always-on regulator.
	*/
	if (!c->vcc)
	return 0;

	/*
	* Assume Vcc regulator is used only to power the card ... OMAP
	* VDDS is used to power the pins, optionally with a transceiver to
	* support cards using voltages other than VDDS (1.8V nominal). When a
	* transceiver is used, DAT3..7 are muxed as transceiver control pins.
	*
	* In some cases this regulator won't support enable/disable;
	* e.g. it's a fixed rail for a WLAN chip.
	*
	* In other cases vcc_aux switches interface power. Example, for
	* eMMC cards it represents VccQ. Sometimes transceivers or SDIO
	* chips/cards need an interface voltage rail too.
	*/
	if (power_on) {
	/* only MMC2 supports a CLKIN */
	if (mmc->slots[0].internal_clock) {
	u32 reg;

	reg = omap_ctrl_readl(control_devconf1_offset);
	reg \|= OMAP2_MMCSDIO2ADPCLKISEL;
	omap_ctrl_writel(reg, control_devconf1_offset);
	}
	ret = mmc_regulator_set_ocr(c->vcc, vdd);
	/* enable interface voltage rail, if needed */
	if (ret == 0 && c->vcc_aux) {
	ret = regulator_enable(c->vcc_aux);
	if (ret < 0)
	ret = mmc_regulator_set_ocr(c->vcc, 0);
	}
	} else {
	if (c->vcc_aux && (ret = regulator_is_enabled(c->vcc_aux)) > 0)
	ret = regulator_disable(c->vcc_aux);
	if (ret == 0)
	ret = mmc_regulator_set_ocr(c->vcc, 0);
	}

	return ret;
	}

	static struct omap_mmc_platform_data *hsmmc_data[OMAP34XX_NR_MMC] __initdata;

	void __init twl4030_mmc_init(struct twl4030_hsmmc_info *controllers)
	{
	struct twl4030_hsmmc_info *c;
	int nr_hsmmc = ARRAY_SIZE(hsmmc_data);

	if (cpu_is_omap2430()) {
	control_pbias_offset = OMAP243X_CONTROL_PBIAS_LITE;
	control_devconf1_offset = OMAP243X_CONTROL_DEVCONF1;
	nr_hsmmc = 2;
	} else {
	control_pbias_offset = OMAP343X_CONTROL_PBIAS_LITE;
	control_devconf1_offset = OMAP343X_CONTROL_DEVCONF1;
	}

	for (c = controllers; c->mmc; c++) {
	struct twl_mmc_controller *twl = hsmmc + c->mmc - 1;
	struct omap_mmc_platform_data *mmc = hsmmc_data[c->mmc - 1];

	if (!c->mmc \|\| c->mmc > nr_hsmmc) {
	pr_debug("MMC%d: no such controller\n", c->mmc);
	continue;
	}
	if (mmc) {
	pr_debug("MMC%d: already configured\n", c->mmc);
	continue;
	}

	mmc = kzalloc(sizeof(struct omap_mmc_platform_data), GFP_KERNEL);
	if (!mmc) {
	pr_err("Cannot allocate memory for mmc device!\n");
	return;
	}

	if (c->name)
	strncpy(twl->name, c->name, HSMMC_NAME_LEN);
	else
	snprintf(twl->name, ARRAY_SIZE(twl->name),
	"mmc%islot%i", c->mmc, 1);
	mmc->slots[0].name = twl->name;
	mmc->nr_slots = 1;
	mmc->slots[0].wires = c->wires;
	mmc->slots[0].internal_clock = !c->ext_clock;
	mmc->dma_mask = 0xffffffff;
	mmc->init = twl_mmc_late_init;

	/* note: twl4030 card detect GPIOs can disable VMMCx ... */
	if (gpio_is_valid(c->gpio_cd)) {
	mmc->cleanup = twl_mmc_cleanup;
	mmc->suspend = twl_mmc_suspend;
	mmc->resume = twl_mmc_resume;

	mmc->slots[0].switch_pin = c->gpio_cd;
	mmc->slots[0].card_detect_irq = gpio_to_irq(c->gpio_cd);
	if (c->cover_only)
	mmc->slots[0].get_cover_state = twl_mmc_get_cover_state;
	else
	mmc->slots[0].card_detect = twl_mmc_card_detect;
	} else
	mmc->slots[0].switch_pin = -EINVAL;

	mmc->get_context_loss_count =
	twl4030_mmc_get_context_loss;

	/* write protect normally uses an OMAP gpio */
	if (gpio_is_valid(c->gpio_wp)) {
	gpio_request(c->gpio_wp, "mmc_wp");
	gpio_direction_input(c->gpio_wp);

	mmc->slots[0].gpio_wp = c->gpio_wp;
	mmc->slots[0].get_ro = twl_mmc_get_ro;
	} else
	mmc->slots[0].gpio_wp = -EINVAL;

	if (c->nonremovable)
	mmc->slots[0].nonremovable = 1;

	if (c->power_saving)
	mmc->slots[0].power_saving = 1;

	/* NOTE: MMC slots should have a Vcc regulator set up.
	* This may be from a TWL4030-family chip, another
	* controllable regulator, or a fixed supply.
	*
	* temporary HACK: ocr_mask instead of fixed supply
	*/
	mmc->slots[0].ocr_mask = c->ocr_mask;

	switch (c->mmc) {
	case 1:
	/* on-chip level shifting via PBIAS0/PBIAS1 */
	mmc->slots[0].set_power = twl_mmc1_set_power;
	break;
	case 2:
	if (c->ext_clock)
	c->transceiver = 1;
	if (c->transceiver && c->wires > 4)
	c->wires = 4;
	/* FALLTHROUGH */
	case 3:
	/* off-chip level shifting, or none */
	mmc->slots[0].set_power = twl_mmc23_set_power;
	break;
	default:
	pr_err("MMC%d configuration not supported!\n", c->mmc);
	kfree(mmc);
	continue;
	}
	hsmmc_data[c->mmc - 1] = mmc;
	}

	omap2_init_mmc(hsmmc_data, OMAP34XX_NR_MMC);

	/* pass the device nodes back to board setup code */
	for (c = controllers; c->mmc; c++) {
	struct omap_mmc_platform_data *mmc = hsmmc_data[c->mmc - 1];

	if (!c->mmc \|\| c->mmc > nr_hsmmc)
	continue;
	c->dev = mmc->dev;
	}
	}

	#endif