arch/arm/mach-omap2/mmc-twl4030.c - linux/kernel/git/davem/net-next - Git at Google

 /*
  * 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/i2c/twl4030.h>
 #include <linux/regulator/machine.h>

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

 #include "mmc-twl4030.h"

 #if defined(CONFIG_TWL4030_CORE) && \
 	(defined(CONFIG_MMC_OMAP_HS) || defined(CONFIG_MMC_OMAP_HS_MODULE))

 #define LDO_CLR			0x00
 #define VSEL_S2_CLR		0x40

 #define VMMC1_DEV_GRP		0x27
 #define VMMC1_CLR		0x00
 #define VMMC1_315V		0x03
 #define VMMC1_300V		0x02
 #define VMMC1_285V		0x01
 #define VMMC1_185V		0x00
 #define VMMC1_DEDICATED		0x2A

 #define VMMC2_DEV_GRP		0x2B
 #define VMMC2_CLR		0x40
 #define VMMC2_315V		0x0c
 #define VMMC2_300V		0x0b
 #define VMMC2_285V		0x0a
 #define VMMC2_280V		0x09
 #define VMMC2_260V		0x08
 #define VMMC2_185V		0x06
 #define VMMC2_DEDICATED		0x2E

 #define VMMC_DEV_GRP_P1		0x20

 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;
 	u8		twl_vmmc_dev_grp;
 	u8		twl_mmc_dedicated;
 	char		name[HSMMC_NAME_LEN + 1];
 } hsmmc[OMAP34XX_NR_MMC] = {
 	{
 		.twl_vmmc_dev_grp		= VMMC1_DEV_GRP,
 		.twl_mmc_dedicated		= VMMC1_DEDICATED,
 	},
 	{
 		.twl_vmmc_dev_grp		= VMMC2_DEV_GRP,
 		.twl_mmc_dedicated		= VMMC2_DEDICATED,
 	},
 };

 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;

 	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;

 	for (i = 0; i < ARRAY_SIZE(hsmmc); i++) {
 		if (hsmmc[i].name == mmc->slots[0].name) {
 			hsmmc[i].mmc = mmc;
 			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;

 	gpio_free(mmc->slots[0].switch_pin);
 }

 #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

 /*
  * Sets the MMC voltage in twl4030
  */

 #define MMC1_OCR	(MMC_VDD_165_195 \
 		|MMC_VDD_28_29|MMC_VDD_29_30|MMC_VDD_30_31|MMC_VDD_31_32)
 #define MMC2_OCR	(MMC_VDD_165_195 \
 		|MMC_VDD_25_26|MMC_VDD_26_27|MMC_VDD_27_28 \
 		|MMC_VDD_28_29|MMC_VDD_29_30|MMC_VDD_30_31|MMC_VDD_31_32)

 static int twl_mmc_set_voltage(struct twl_mmc_controller *c, int vdd)
 {
 	int ret;
 	u8 vmmc = 0, dev_grp_val;

 	if (!vdd)
 		goto doit;

 	if (c->twl_vmmc_dev_grp == VMMC1_DEV_GRP) {
 		/* VMMC1:  max 220 mA.  And for 8-bit mode,
 		 * VSIM:  max 50 mA
 		 */
 		switch (1 << vdd) {
 		case MMC_VDD_165_195:
 			vmmc = VMMC1_185V;
 			/* and VSIM_180V */
 			break;
 		case MMC_VDD_28_29:
 			vmmc = VMMC1_285V;
 			/* and VSIM_280V */
 			break;
 		case MMC_VDD_29_30:
 		case MMC_VDD_30_31:
 			vmmc = VMMC1_300V;
 			/* and VSIM_300V */
 			break;
 		case MMC_VDD_31_32:
 			vmmc = VMMC1_315V;
 			/* error if VSIM needed */
 			break;
 		default:
 			return -EINVAL;
 		}
 	} else if (c->twl_vmmc_dev_grp == VMMC2_DEV_GRP) {
 		/* VMMC2:  max 100 mA */
 		switch (1 << vdd) {
 		case MMC_VDD_165_195:
 			vmmc = VMMC2_185V;
 			break;
 		case MMC_VDD_25_26:
 		case MMC_VDD_26_27:
 			vmmc = VMMC2_260V;
 			break;
 		case MMC_VDD_27_28:
 			vmmc = VMMC2_280V;
 			break;
 		case MMC_VDD_28_29:
 			vmmc = VMMC2_285V;
 			break;
 		case MMC_VDD_29_30:
 		case MMC_VDD_30_31:
 			vmmc = VMMC2_300V;
 			break;
 		case MMC_VDD_31_32:
 			vmmc = VMMC2_315V;
 			break;
 		default:
 			return -EINVAL;
 		}
 	} else {
 		return -EINVAL;
 	}

 doit:
 	if (vdd)
 		dev_grp_val = VMMC_DEV_GRP_P1;	/* Power up */
 	else
 		dev_grp_val = LDO_CLR;		/* Power down */

 	ret = twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
 					dev_grp_val, c->twl_vmmc_dev_grp);
 	if (ret || !vdd)
 		return ret;

 	ret = twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
 					vmmc, c->twl_mmc_dedicated);

 	return ret;
 }

 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 using the same TWL VMMC1 supply (hsmmc[0]); 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.
 	 */
 	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 = twl_mmc_set_voltage(c, 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 = twl_mmc_set_voltage(c, 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_mmc2_set_power(struct device *dev, int slot, int power_on, int vdd)
 {
 	int ret;
 	struct twl_mmc_controller *c = &hsmmc[1];
 	struct omap_mmc_platform_data *mmc = dev->platform_data;

 	/*
 	 * Assume TWL VMMC2 (hsmmc[1]) 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.
 	 */
 	if (power_on) {
 		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 = twl_mmc_set_voltage(c, vdd);
 	} else {
 		ret = twl_mmc_set_voltage(c, 0);
 	}

 	return ret;
 }

 static int twl_mmc3_set_power(struct device *dev, int slot, int power_on,
 		int vdd)
 {
 	/*
 	 * Assume MMC3 has self-powered device connected, for example on-board
 	 * chip with external power source.
 	 */
 	return 0;
 }

 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;

 		/* note: twl4030 card detect GPIOs normally switch VMMCx ... */
 		if (gpio_is_valid(c->gpio_cd)) {
 			mmc->init = twl_mmc_late_init;
 			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;

 		/* 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;

 		/* NOTE:  we assume OMAP's MMC1 and MMC2 use
 		 * the TWL4030's VMMC1 and VMMC2, respectively;
 		 * and that MMC3 device has it's own power source.
 		 */

 		switch (c->mmc) {
 		case 1:
 			mmc->slots[0].set_power = twl_mmc1_set_power;
 			mmc->slots[0].ocr_mask = MMC1_OCR;
 			break;
 		case 2:
 			mmc->slots[0].set_power = twl_mmc2_set_power;
 			if (c->transceiver)
 				mmc->slots[0].ocr_mask = MMC2_OCR;
 			else
 				mmc->slots[0].ocr_mask = MMC_VDD_165_195;
 			break;
 		case 3:
 			mmc->slots[0].set_power = twl_mmc3_set_power;
 			mmc->slots[0].ocr_mask = MMC_VDD_165_195;
 			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/i2c/twl4030.h>
	#include <linux/regulator/machine.h>

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

	#include "mmc-twl4030.h"

	#if defined(CONFIG_TWL4030_CORE) && \
	(defined(CONFIG_MMC_OMAP_HS) \|\| defined(CONFIG_MMC_OMAP_HS_MODULE))

	#define LDO_CLR 0x00
	#define VSEL_S2_CLR 0x40

	#define VMMC1_DEV_GRP 0x27
	#define VMMC1_CLR 0x00
	#define VMMC1_315V 0x03
	#define VMMC1_300V 0x02
	#define VMMC1_285V 0x01
	#define VMMC1_185V 0x00
	#define VMMC1_DEDICATED 0x2A

	#define VMMC2_DEV_GRP 0x2B
	#define VMMC2_CLR 0x40
	#define VMMC2_315V 0x0c
	#define VMMC2_300V 0x0b
	#define VMMC2_285V 0x0a
	#define VMMC2_280V 0x09
	#define VMMC2_260V 0x08
	#define VMMC2_185V 0x06
	#define VMMC2_DEDICATED 0x2E

	#define VMMC_DEV_GRP_P1 0x20

	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;
	u8 twl_vmmc_dev_grp;
	u8 twl_mmc_dedicated;
	char name[HSMMC_NAME_LEN + 1];
	} hsmmc[OMAP34XX_NR_MMC] = {
	{
	.twl_vmmc_dev_grp = VMMC1_DEV_GRP,
	.twl_mmc_dedicated = VMMC1_DEDICATED,
	},
	{
	.twl_vmmc_dev_grp = VMMC2_DEV_GRP,
	.twl_mmc_dedicated = VMMC2_DEDICATED,
	},
	};

	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;

	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;

	for (i = 0; i < ARRAY_SIZE(hsmmc); i++) {
	if (hsmmc[i].name == mmc->slots[0].name) {
	hsmmc[i].mmc = mmc;
	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;

	gpio_free(mmc->slots[0].switch_pin);
	}

	#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

	/*
	* Sets the MMC voltage in twl4030
	*/

	#define MMC1_OCR (MMC_VDD_165_195 \
	\|MMC_VDD_28_29\|MMC_VDD_29_30\|MMC_VDD_30_31\|MMC_VDD_31_32)
	#define MMC2_OCR (MMC_VDD_165_195 \
	\|MMC_VDD_25_26\|MMC_VDD_26_27\|MMC_VDD_27_28 \
	\|MMC_VDD_28_29\|MMC_VDD_29_30\|MMC_VDD_30_31\|MMC_VDD_31_32)

	static int twl_mmc_set_voltage(struct twl_mmc_controller *c, int vdd)
	{
	int ret;
	u8 vmmc = 0, dev_grp_val;

	if (!vdd)
	goto doit;

	if (c->twl_vmmc_dev_grp == VMMC1_DEV_GRP) {
	/* VMMC1: max 220 mA. And for 8-bit mode,
	* VSIM: max 50 mA
	*/
	switch (1 << vdd) {
	case MMC_VDD_165_195:
	vmmc = VMMC1_185V;
	/* and VSIM_180V */
	break;
	case MMC_VDD_28_29:
	vmmc = VMMC1_285V;
	/* and VSIM_280V */
	break;
	case MMC_VDD_29_30:
	case MMC_VDD_30_31:
	vmmc = VMMC1_300V;
	/* and VSIM_300V */
	break;
	case MMC_VDD_31_32:
	vmmc = VMMC1_315V;
	/* error if VSIM needed */
	break;
	default:
	return -EINVAL;
	}
	} else if (c->twl_vmmc_dev_grp == VMMC2_DEV_GRP) {
	/* VMMC2: max 100 mA */
	switch (1 << vdd) {
	case MMC_VDD_165_195:
	vmmc = VMMC2_185V;
	break;
	case MMC_VDD_25_26:
	case MMC_VDD_26_27:
	vmmc = VMMC2_260V;
	break;
	case MMC_VDD_27_28:
	vmmc = VMMC2_280V;
	break;
	case MMC_VDD_28_29:
	vmmc = VMMC2_285V;
	break;
	case MMC_VDD_29_30:
	case MMC_VDD_30_31:
	vmmc = VMMC2_300V;
	break;
	case MMC_VDD_31_32:
	vmmc = VMMC2_315V;
	break;
	default:
	return -EINVAL;
	}
	} else {
	return -EINVAL;
	}

	doit:
	if (vdd)
	dev_grp_val = VMMC_DEV_GRP_P1; /* Power up */
	else
	dev_grp_val = LDO_CLR; /* Power down */

	ret = twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
	dev_grp_val, c->twl_vmmc_dev_grp);
	if (ret \|\| !vdd)
	return ret;

	ret = twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
	vmmc, c->twl_mmc_dedicated);

	return ret;
	}

	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 using the same TWL VMMC1 supply (hsmmc[0]); 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.
	*/
	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 = twl_mmc_set_voltage(c, 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 = twl_mmc_set_voltage(c, 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_mmc2_set_power(struct device *dev, int slot, int power_on, int vdd)
	{
	int ret;
	struct twl_mmc_controller *c = &hsmmc[1];
	struct omap_mmc_platform_data *mmc = dev->platform_data;

	/*
	* Assume TWL VMMC2 (hsmmc[1]) 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.
	*/
	if (power_on) {
	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 = twl_mmc_set_voltage(c, vdd);
	} else {
	ret = twl_mmc_set_voltage(c, 0);
	}

	return ret;
	}

	static int twl_mmc3_set_power(struct device *dev, int slot, int power_on,
	int vdd)
	{
	/*
	* Assume MMC3 has self-powered device connected, for example on-board
	* chip with external power source.
	*/
	return 0;
	}

	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;

	/* note: twl4030 card detect GPIOs normally switch VMMCx ... */
	if (gpio_is_valid(c->gpio_cd)) {
	mmc->init = twl_mmc_late_init;
	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;

	/* 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;

	/* NOTE: we assume OMAP's MMC1 and MMC2 use
	* the TWL4030's VMMC1 and VMMC2, respectively;
	* and that MMC3 device has it's own power source.
	*/

	switch (c->mmc) {
	case 1:
	mmc->slots[0].set_power = twl_mmc1_set_power;
	mmc->slots[0].ocr_mask = MMC1_OCR;
	break;
	case 2:
	mmc->slots[0].set_power = twl_mmc2_set_power;
	if (c->transceiver)
	mmc->slots[0].ocr_mask = MMC2_OCR;
	else
	mmc->slots[0].ocr_mask = MMC_VDD_165_195;
	break;
	case 3:
	mmc->slots[0].set_power = twl_mmc3_set_power;
	mmc->slots[0].ocr_mask = MMC_VDD_165_195;
	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