arch/arm/mach-omap2/hsmmc.c - kernel/msm-4.9 - Gitiles

 /*
  * linux/arch/arm/mach-omap2/hsmmc.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/kernel.h>
 #include <linux/slab.h>
 #include <linux/string.h>
 #include <linux/delay.h>
 #include <linux/gpio.h>
 #include <linux/mmc/host.h>
 #include <linux/platform_data/gpio-omap.h>
 #include <linux/platform_data/hsmmc-omap.h>

 #include "soc.h"
 #include "omap_device.h"
 #include "omap-pm.h"

 #include "mux.h"
 #include "hsmmc.h"
 #include "control.h"

 #if IS_ENABLED(CONFIG_MMC_OMAP_HS)

 static u16 control_pbias_offset;
 static u16 control_devconf1_offset;

 #define HSMMC_NAME_LEN	9

 static void omap_hsmmc1_before_set_reg(struct device *dev,
 				       int power_on, int vdd)
 {
 	u32 reg, prog_io;
 	struct omap_hsmmc_platform_data *mmc = dev->platform_data;

 	if (mmc->remux)
 		mmc->remux(dev, power_on);

 	/*
 	 * 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->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);
 		if (cpu_is_omap3630()) {
 			/* Set MMC I/O to 52MHz */
 			prog_io = omap_ctrl_readl(OMAP343X_CONTROL_PROG_IO1);
 			prog_io |= OMAP3630_PRG_SDMMC1_SPEEDCTRL;
 			omap_ctrl_writel(prog_io, OMAP343X_CONTROL_PROG_IO1);
 		} else {
 			reg |= OMAP2_PBIASSPEEDCTRL0;
 		}
 		reg &= ~OMAP2_PBIASLITEPWRDNZ0;
 		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);
 	}
 }

 static void omap_hsmmc1_after_set_reg(struct device *dev, int power_on, int vdd)
 {
 	u32 reg;

 	/* 100ms delay required for PBIAS configuration */
 	msleep(100);

 	if (power_on) {
 		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_PBIASSPEEDCTRL0 | OMAP2_PBIASLITEPWRDNZ0 |
 			OMAP2_PBIASLITEVMODE0);
 		omap_ctrl_writel(reg, control_pbias_offset);
 	}
 }

 static void hsmmc2_select_input_clk_src(struct omap_hsmmc_platform_data *mmc)
 {
 	u32 reg;

 	reg = omap_ctrl_readl(control_devconf1_offset);
 	if (mmc->internal_clock)
 		reg |= OMAP2_MMCSDIO2ADPCLKISEL;
 	else
 		reg &= ~OMAP2_MMCSDIO2ADPCLKISEL;
 	omap_ctrl_writel(reg, control_devconf1_offset);
 }

 static void hsmmc2_before_set_reg(struct device *dev, int power_on, int vdd)
 {
 	struct omap_hsmmc_platform_data *mmc = dev->platform_data;

 	if (mmc->remux)
 		mmc->remux(dev, power_on);

 	if (power_on)
 		hsmmc2_select_input_clk_src(mmc);
 }

 static int am35x_hsmmc2_set_power(struct device *dev, int power_on, int vdd)
 {
 	struct omap_hsmmc_platform_data *mmc = dev->platform_data;

 	if (power_on)
 		hsmmc2_select_input_clk_src(mmc);

 	return 0;
 }

 static int nop_mmc_set_power(struct device *dev, int power_on, int vdd)
 {
 	return 0;
 }

 static inline void omap_hsmmc_mux(struct omap_hsmmc_platform_data
 				  *mmc_controller, int controller_nr)
 {
 	if (gpio_is_valid(mmc_controller->gpio_cd) &&
 	    (mmc_controller->gpio_cd < OMAP_MAX_GPIO_LINES))
 		omap_mux_init_gpio(mmc_controller->gpio_cd,
 				   OMAP_PIN_INPUT_PULLUP);
 	if (gpio_is_valid(mmc_controller->gpio_cod) &&
 	    (mmc_controller->gpio_cod < OMAP_MAX_GPIO_LINES))
 		omap_mux_init_gpio(mmc_controller->gpio_cod,
 				   OMAP_PIN_INPUT_PULLUP);
 	if (gpio_is_valid(mmc_controller->gpio_wp) &&
 	    (mmc_controller->gpio_wp < OMAP_MAX_GPIO_LINES))
 		omap_mux_init_gpio(mmc_controller->gpio_wp,
 				   OMAP_PIN_INPUT_PULLUP);
 	if (cpu_is_omap34xx()) {
 		if (controller_nr == 0) {
 			omap_mux_init_signal("sdmmc1_clk",
 				OMAP_PIN_INPUT_PULLUP);
 			omap_mux_init_signal("sdmmc1_cmd",
 				OMAP_PIN_INPUT_PULLUP);
 			omap_mux_init_signal("sdmmc1_dat0",
 				OMAP_PIN_INPUT_PULLUP);
 			if (mmc_controller->caps &
 				(MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA)) {
 				omap_mux_init_signal("sdmmc1_dat1",
 					OMAP_PIN_INPUT_PULLUP);
 				omap_mux_init_signal("sdmmc1_dat2",
 					OMAP_PIN_INPUT_PULLUP);
 				omap_mux_init_signal("sdmmc1_dat3",
 					OMAP_PIN_INPUT_PULLUP);
 			}
 			if (mmc_controller->caps &
 						MMC_CAP_8_BIT_DATA) {
 				omap_mux_init_signal("sdmmc1_dat4",
 					OMAP_PIN_INPUT_PULLUP);
 				omap_mux_init_signal("sdmmc1_dat5",
 					OMAP_PIN_INPUT_PULLUP);
 				omap_mux_init_signal("sdmmc1_dat6",
 					OMAP_PIN_INPUT_PULLUP);
 				omap_mux_init_signal("sdmmc1_dat7",
 					OMAP_PIN_INPUT_PULLUP);
 			}
 		}
 		if (controller_nr == 1) {
 			/* MMC2 */
 			omap_mux_init_signal("sdmmc2_clk",
 				OMAP_PIN_INPUT_PULLUP);
 			omap_mux_init_signal("sdmmc2_cmd",
 				OMAP_PIN_INPUT_PULLUP);
 			omap_mux_init_signal("sdmmc2_dat0",
 				OMAP_PIN_INPUT_PULLUP);

 			/*
 			 * For 8 wire configurations, Lines DAT4, 5, 6 and 7
 			 * need to be muxed in the board-*.c files
 			 */
 			if (mmc_controller->caps &
 				(MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA)) {
 				omap_mux_init_signal("sdmmc2_dat1",
 					OMAP_PIN_INPUT_PULLUP);
 				omap_mux_init_signal("sdmmc2_dat2",
 					OMAP_PIN_INPUT_PULLUP);
 				omap_mux_init_signal("sdmmc2_dat3",
 					OMAP_PIN_INPUT_PULLUP);
 			}
 			if (mmc_controller->caps &
 							MMC_CAP_8_BIT_DATA) {
 				omap_mux_init_signal("sdmmc2_dat4.sdmmc2_dat4",
 					OMAP_PIN_INPUT_PULLUP);
 				omap_mux_init_signal("sdmmc2_dat5.sdmmc2_dat5",
 					OMAP_PIN_INPUT_PULLUP);
 				omap_mux_init_signal("sdmmc2_dat6.sdmmc2_dat6",
 					OMAP_PIN_INPUT_PULLUP);
 				omap_mux_init_signal("sdmmc2_dat7.sdmmc2_dat7",
 					OMAP_PIN_INPUT_PULLUP);
 			}
 		}

 		/*
 		 * For MMC3 the pins need to be muxed in the board-*.c files
 		 */
 	}
 }

 static int __init omap_hsmmc_pdata_init(struct omap2_hsmmc_info *c,
 					struct omap_hsmmc_platform_data *mmc)
 {
 	char *hc_name;

 	hc_name = kzalloc(sizeof(char) * (HSMMC_NAME_LEN + 1), GFP_KERNEL);
 	if (!hc_name) {
 		pr_err("Cannot allocate memory for controller slot name\n");
 		kfree(hc_name);
 		return -ENOMEM;
 	}

 	if (c->name)
 		strncpy(hc_name, c->name, HSMMC_NAME_LEN);
 	else
 		snprintf(hc_name, (HSMMC_NAME_LEN + 1), "mmc%islot%i",
 								c->mmc, 1);
 	mmc->name = hc_name;
 	mmc->caps = c->caps;
 	mmc->internal_clock = !c->ext_clock;
 	mmc->reg_offset = 0;

 	if (c->cover_only) {
 		/* detect if mobile phone cover removed */
 		mmc->gpio_cd = -EINVAL;
 		mmc->gpio_cod = c->gpio_cd;
 	} else {
 		/* card detect pin on the mmc socket itself */
 		mmc->gpio_cd = c->gpio_cd;
 		mmc->gpio_cod = -EINVAL;
 	}
 	mmc->gpio_wp = c->gpio_wp;

 	mmc->remux = c->remux;
 	mmc->init_card = c->init_card;

 	if (c->nonremovable)
 		mmc->nonremovable = 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
 	 */
 	if (soc_is_am35xx())
 		mmc->ocr_mask = MMC_VDD_165_195 |
 					 MMC_VDD_26_27 |
 					 MMC_VDD_27_28 |
 					 MMC_VDD_29_30 |
 					 MMC_VDD_30_31 |
 					 MMC_VDD_31_32;
 	else
 		mmc->ocr_mask = c->ocr_mask;

 	if (!soc_is_am35xx())
 		mmc->features |= HSMMC_HAS_PBIAS;

 	switch (c->mmc) {
 	case 1:
 		if (mmc->features & HSMMC_HAS_PBIAS) {
 			/* on-chip level shifting via PBIAS0/PBIAS1 */
 			mmc->before_set_reg =
 					omap_hsmmc1_before_set_reg;
 			mmc->after_set_reg =
 					omap_hsmmc1_after_set_reg;
 		}

 		if (soc_is_am35xx())
 			mmc->set_power = nop_mmc_set_power;

 		/* OMAP3630 HSMMC1 supports only 4-bit */
 		if (cpu_is_omap3630() &&
 				(c->caps & MMC_CAP_8_BIT_DATA)) {
 			c->caps &= ~MMC_CAP_8_BIT_DATA;
 			c->caps |= MMC_CAP_4_BIT_DATA;
 			mmc->caps = c->caps;
 		}
 		break;
 	case 2:
 		if (soc_is_am35xx())
 			mmc->set_power = am35x_hsmmc2_set_power;

 		if (c->ext_clock)
 			c->transceiver = 1;
 		if (c->transceiver && (c->caps & MMC_CAP_8_BIT_DATA)) {
 			c->caps &= ~MMC_CAP_8_BIT_DATA;
 			c->caps |= MMC_CAP_4_BIT_DATA;
 		}
 		if (mmc->features & HSMMC_HAS_PBIAS) {
 			/* off-chip level shifting, or none */
 			mmc->before_set_reg = hsmmc2_before_set_reg;
 			mmc->after_set_reg = NULL;
 		}
 		break;
 	case 3:
 	case 4:
 	case 5:
 		mmc->before_set_reg = NULL;
 		mmc->after_set_reg = NULL;
 		break;
 	default:
 		pr_err("MMC%d configuration not supported!\n", c->mmc);
 		kfree(hc_name);
 		return -ENODEV;
 	}
 	return 0;
 }

 static int omap_hsmmc_done;

 void omap_hsmmc_late_init(struct omap2_hsmmc_info *c)
 {
 	struct platform_device *pdev;
 	struct omap_hsmmc_platform_data *mmc_pdata;
 	int res;

 	if (omap_hsmmc_done != 1)
 		return;

 	omap_hsmmc_done++;

 	for (; c->mmc; c++) {
 		if (!c->deferred)
 			continue;

 		pdev = c->pdev;
 		if (!pdev)
 			continue;

 		mmc_pdata = pdev->dev.platform_data;
 		if (!mmc_pdata)
 			continue;

 		if (c->cover_only) {
 			/* detect if mobile phone cover removed */
 			mmc_pdata->gpio_cd = -EINVAL;
 			mmc_pdata->gpio_cod = c->gpio_cd;
 		} else {
 			/* card detect pin on the mmc socket itself */
 			mmc_pdata->gpio_cd = c->gpio_cd;
 			mmc_pdata->gpio_cod = -EINVAL;
 		}
 		mmc_pdata->gpio_wp = c->gpio_wp;

 		res = omap_device_register(pdev);
 		if (res)
 			pr_err("Could not late init MMC %s\n",
 			       c->name);
 	}
 }

 #define MAX_OMAP_MMC_HWMOD_NAME_LEN		16

 static void __init omap_hsmmc_init_one(struct omap2_hsmmc_info *hsmmcinfo,
 					int ctrl_nr)
 {
 	struct omap_hwmod *oh;
 	struct omap_hwmod *ohs[1];
 	struct omap_device *od;
 	struct platform_device *pdev;
 	char oh_name[MAX_OMAP_MMC_HWMOD_NAME_LEN];
 	struct omap_hsmmc_platform_data *mmc_data;
 	struct omap_hsmmc_dev_attr *mmc_dev_attr;
 	char *name;
 	int res;

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

 	res = omap_hsmmc_pdata_init(hsmmcinfo, mmc_data);
 	if (res < 0)
 		goto free_mmc;

 	omap_hsmmc_mux(mmc_data, (ctrl_nr - 1));

 	name = "omap_hsmmc";
 	res = snprintf(oh_name, MAX_OMAP_MMC_HWMOD_NAME_LEN,
 		     "mmc%d", ctrl_nr);
 	WARN(res >= MAX_OMAP_MMC_HWMOD_NAME_LEN,
 	     "String buffer overflow in MMC%d device setup\n", ctrl_nr);

 	oh = omap_hwmod_lookup(oh_name);
 	if (!oh) {
 		pr_err("Could not look up %s\n", oh_name);
 		goto free_name;
 	}
 	ohs[0] = oh;
 	if (oh->dev_attr != NULL) {
 		mmc_dev_attr = oh->dev_attr;
 		mmc_data->controller_flags = mmc_dev_attr->flags;
 		/*
 		 * erratum 2.1.1.128 doesn't apply if board has
 		 * a transceiver is attached
 		 */
 		if (hsmmcinfo->transceiver)
 			mmc_data->controller_flags &=
 				~OMAP_HSMMC_BROKEN_MULTIBLOCK_READ;
 	}

 	pdev = platform_device_alloc(name, ctrl_nr - 1);
 	if (!pdev) {
 		pr_err("Could not allocate pdev for %s\n", name);
 		goto free_name;
 	}
 	dev_set_name(&pdev->dev, "%s.%d", pdev->name, pdev->id);

 	od = omap_device_alloc(pdev, ohs, 1);
 	if (IS_ERR(od)) {
 		pr_err("Could not allocate od for %s\n", name);
 		goto put_pdev;
 	}

 	res = platform_device_add_data(pdev, mmc_data,
 			      sizeof(struct omap_hsmmc_platform_data));
 	if (res) {
 		pr_err("Could not add pdata for %s\n", name);
 		goto put_pdev;
 	}

 	hsmmcinfo->pdev = pdev;

 	if (hsmmcinfo->deferred)
 		goto free_mmc;

 	res = omap_device_register(pdev);
 	if (res) {
 		pr_err("Could not register od for %s\n", name);
 		goto free_od;
 	}

 	goto free_mmc;

 free_od:
 	omap_device_delete(od);

 put_pdev:
 	platform_device_put(pdev);

 free_name:
 	kfree(mmc_data->name);

 free_mmc:
 	kfree(mmc_data);
 }

 void __init omap_hsmmc_init(struct omap2_hsmmc_info *controllers)
 {
 	if (omap_hsmmc_done)
 		return;

 	omap_hsmmc_done = 1;

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

 	for (; controllers->mmc; controllers++)
 		omap_hsmmc_init_one(controllers, controllers->mmc);

 }

 #endif
	/*
	* linux/arch/arm/mach-omap2/hsmmc.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/kernel.h>
	#include <linux/slab.h>
	#include <linux/string.h>
	#include <linux/delay.h>
	#include <linux/gpio.h>
	#include <linux/mmc/host.h>
	#include <linux/platform_data/gpio-omap.h>
	#include <linux/platform_data/hsmmc-omap.h>

	#include "soc.h"
	#include "omap_device.h"
	#include "omap-pm.h"

	#include "mux.h"
	#include "hsmmc.h"
	#include "control.h"

	#if IS_ENABLED(CONFIG_MMC_OMAP_HS)

	static u16 control_pbias_offset;
	static u16 control_devconf1_offset;

	#define HSMMC_NAME_LEN 9

	static void omap_hsmmc1_before_set_reg(struct device *dev,
	int power_on, int vdd)
	{
	u32 reg, prog_io;
	struct omap_hsmmc_platform_data *mmc = dev->platform_data;

	if (mmc->remux)
	mmc->remux(dev, power_on);

	/*
	* 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->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);
	if (cpu_is_omap3630()) {
	/* Set MMC I/O to 52MHz */
	prog_io = omap_ctrl_readl(OMAP343X_CONTROL_PROG_IO1);
	prog_io \|= OMAP3630_PRG_SDMMC1_SPEEDCTRL;
	omap_ctrl_writel(prog_io, OMAP343X_CONTROL_PROG_IO1);
	} else {
	reg \|= OMAP2_PBIASSPEEDCTRL0;
	}
	reg &= ~OMAP2_PBIASLITEPWRDNZ0;
	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);
	}
	}

	static void omap_hsmmc1_after_set_reg(struct device *dev, int power_on, int vdd)
	{
	u32 reg;

	/* 100ms delay required for PBIAS configuration */
	msleep(100);

	if (power_on) {
	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_PBIASSPEEDCTRL0 \| OMAP2_PBIASLITEPWRDNZ0 \|
	OMAP2_PBIASLITEVMODE0);
	omap_ctrl_writel(reg, control_pbias_offset);
	}
	}

	static void hsmmc2_select_input_clk_src(struct omap_hsmmc_platform_data *mmc)
	{
	u32 reg;

	reg = omap_ctrl_readl(control_devconf1_offset);
	if (mmc->internal_clock)
	reg \|= OMAP2_MMCSDIO2ADPCLKISEL;
	else
	reg &= ~OMAP2_MMCSDIO2ADPCLKISEL;
	omap_ctrl_writel(reg, control_devconf1_offset);
	}

	static void hsmmc2_before_set_reg(struct device *dev, int power_on, int vdd)
	{
	struct omap_hsmmc_platform_data *mmc = dev->platform_data;

	if (mmc->remux)
	mmc->remux(dev, power_on);

	if (power_on)
	hsmmc2_select_input_clk_src(mmc);
	}

	static int am35x_hsmmc2_set_power(struct device *dev, int power_on, int vdd)
	{
	struct omap_hsmmc_platform_data *mmc = dev->platform_data;

	if (power_on)
	hsmmc2_select_input_clk_src(mmc);

	return 0;
	}

	static int nop_mmc_set_power(struct device *dev, int power_on, int vdd)
	{
	return 0;
	}

	static inline void omap_hsmmc_mux(struct omap_hsmmc_platform_data
	*mmc_controller, int controller_nr)
	{
	if (gpio_is_valid(mmc_controller->gpio_cd) &&
	(mmc_controller->gpio_cd < OMAP_MAX_GPIO_LINES))
	omap_mux_init_gpio(mmc_controller->gpio_cd,
	OMAP_PIN_INPUT_PULLUP);
	if (gpio_is_valid(mmc_controller->gpio_cod) &&
	(mmc_controller->gpio_cod < OMAP_MAX_GPIO_LINES))
	omap_mux_init_gpio(mmc_controller->gpio_cod,
	OMAP_PIN_INPUT_PULLUP);
	if (gpio_is_valid(mmc_controller->gpio_wp) &&
	(mmc_controller->gpio_wp < OMAP_MAX_GPIO_LINES))
	omap_mux_init_gpio(mmc_controller->gpio_wp,
	OMAP_PIN_INPUT_PULLUP);
	if (cpu_is_omap34xx()) {
	if (controller_nr == 0) {
	omap_mux_init_signal("sdmmc1_clk",
	OMAP_PIN_INPUT_PULLUP);
	omap_mux_init_signal("sdmmc1_cmd",
	OMAP_PIN_INPUT_PULLUP);
	omap_mux_init_signal("sdmmc1_dat0",
	OMAP_PIN_INPUT_PULLUP);
	if (mmc_controller->caps &
	(MMC_CAP_4_BIT_DATA \| MMC_CAP_8_BIT_DATA)) {
	omap_mux_init_signal("sdmmc1_dat1",
	OMAP_PIN_INPUT_PULLUP);
	omap_mux_init_signal("sdmmc1_dat2",
	OMAP_PIN_INPUT_PULLUP);
	omap_mux_init_signal("sdmmc1_dat3",
	OMAP_PIN_INPUT_PULLUP);
	}
	if (mmc_controller->caps &
	MMC_CAP_8_BIT_DATA) {
	omap_mux_init_signal("sdmmc1_dat4",
	OMAP_PIN_INPUT_PULLUP);
	omap_mux_init_signal("sdmmc1_dat5",
	OMAP_PIN_INPUT_PULLUP);
	omap_mux_init_signal("sdmmc1_dat6",
	OMAP_PIN_INPUT_PULLUP);
	omap_mux_init_signal("sdmmc1_dat7",
	OMAP_PIN_INPUT_PULLUP);
	}
	}
	if (controller_nr == 1) {
	/* MMC2 */
	omap_mux_init_signal("sdmmc2_clk",
	OMAP_PIN_INPUT_PULLUP);
	omap_mux_init_signal("sdmmc2_cmd",
	OMAP_PIN_INPUT_PULLUP);
	omap_mux_init_signal("sdmmc2_dat0",
	OMAP_PIN_INPUT_PULLUP);

	/*
	* For 8 wire configurations, Lines DAT4, 5, 6 and 7
	* need to be muxed in the board-*.c files
	*/
	if (mmc_controller->caps &
	(MMC_CAP_4_BIT_DATA \| MMC_CAP_8_BIT_DATA)) {
	omap_mux_init_signal("sdmmc2_dat1",
	OMAP_PIN_INPUT_PULLUP);
	omap_mux_init_signal("sdmmc2_dat2",
	OMAP_PIN_INPUT_PULLUP);
	omap_mux_init_signal("sdmmc2_dat3",
	OMAP_PIN_INPUT_PULLUP);
	}
	if (mmc_controller->caps &
	MMC_CAP_8_BIT_DATA) {
	omap_mux_init_signal("sdmmc2_dat4.sdmmc2_dat4",
	OMAP_PIN_INPUT_PULLUP);
	omap_mux_init_signal("sdmmc2_dat5.sdmmc2_dat5",
	OMAP_PIN_INPUT_PULLUP);
	omap_mux_init_signal("sdmmc2_dat6.sdmmc2_dat6",
	OMAP_PIN_INPUT_PULLUP);
	omap_mux_init_signal("sdmmc2_dat7.sdmmc2_dat7",
	OMAP_PIN_INPUT_PULLUP);
	}
	}

	/*
	* For MMC3 the pins need to be muxed in the board-*.c files
	*/
	}
	}

	static int __init omap_hsmmc_pdata_init(struct omap2_hsmmc_info *c,
	struct omap_hsmmc_platform_data *mmc)
	{
	char *hc_name;

	hc_name = kzalloc(sizeof(char) * (HSMMC_NAME_LEN + 1), GFP_KERNEL);
	if (!hc_name) {
	pr_err("Cannot allocate memory for controller slot name\n");
	kfree(hc_name);
	return -ENOMEM;
	}

	if (c->name)
	strncpy(hc_name, c->name, HSMMC_NAME_LEN);
	else
	snprintf(hc_name, (HSMMC_NAME_LEN + 1), "mmc%islot%i",
	c->mmc, 1);
	mmc->name = hc_name;
	mmc->caps = c->caps;
	mmc->internal_clock = !c->ext_clock;
	mmc->reg_offset = 0;

	if (c->cover_only) {
	/* detect if mobile phone cover removed */
	mmc->gpio_cd = -EINVAL;
	mmc->gpio_cod = c->gpio_cd;
	} else {
	/* card detect pin on the mmc socket itself */
	mmc->gpio_cd = c->gpio_cd;
	mmc->gpio_cod = -EINVAL;
	}
	mmc->gpio_wp = c->gpio_wp;

	mmc->remux = c->remux;
	mmc->init_card = c->init_card;

	if (c->nonremovable)
	mmc->nonremovable = 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
	*/
	if (soc_is_am35xx())
	mmc->ocr_mask = MMC_VDD_165_195 \|
	MMC_VDD_26_27 \|
	MMC_VDD_27_28 \|
	MMC_VDD_29_30 \|
	MMC_VDD_30_31 \|
	MMC_VDD_31_32;
	else
	mmc->ocr_mask = c->ocr_mask;

	if (!soc_is_am35xx())
	mmc->features \|= HSMMC_HAS_PBIAS;

	switch (c->mmc) {
	case 1:
	if (mmc->features & HSMMC_HAS_PBIAS) {
	/* on-chip level shifting via PBIAS0/PBIAS1 */
	mmc->before_set_reg =
	omap_hsmmc1_before_set_reg;
	mmc->after_set_reg =
	omap_hsmmc1_after_set_reg;
	}

	if (soc_is_am35xx())
	mmc->set_power = nop_mmc_set_power;

	/* OMAP3630 HSMMC1 supports only 4-bit */
	if (cpu_is_omap3630() &&
	(c->caps & MMC_CAP_8_BIT_DATA)) {
	c->caps &= ~MMC_CAP_8_BIT_DATA;
	c->caps \|= MMC_CAP_4_BIT_DATA;
	mmc->caps = c->caps;
	}
	break;
	case 2:
	if (soc_is_am35xx())
	mmc->set_power = am35x_hsmmc2_set_power;

	if (c->ext_clock)
	c->transceiver = 1;
	if (c->transceiver && (c->caps & MMC_CAP_8_BIT_DATA)) {
	c->caps &= ~MMC_CAP_8_BIT_DATA;
	c->caps \|= MMC_CAP_4_BIT_DATA;
	}
	if (mmc->features & HSMMC_HAS_PBIAS) {
	/* off-chip level shifting, or none */
	mmc->before_set_reg = hsmmc2_before_set_reg;
	mmc->after_set_reg = NULL;
	}
	break;
	case 3:
	case 4:
	case 5:
	mmc->before_set_reg = NULL;
	mmc->after_set_reg = NULL;
	break;
	default:
	pr_err("MMC%d configuration not supported!\n", c->mmc);
	kfree(hc_name);
	return -ENODEV;
	}
	return 0;
	}

	static int omap_hsmmc_done;

	void omap_hsmmc_late_init(struct omap2_hsmmc_info *c)
	{
	struct platform_device *pdev;
	struct omap_hsmmc_platform_data *mmc_pdata;
	int res;

	if (omap_hsmmc_done != 1)
	return;

	omap_hsmmc_done++;

	for (; c->mmc; c++) {
	if (!c->deferred)
	continue;

	pdev = c->pdev;
	if (!pdev)
	continue;

	mmc_pdata = pdev->dev.platform_data;
	if (!mmc_pdata)
	continue;

	if (c->cover_only) {
	/* detect if mobile phone cover removed */
	mmc_pdata->gpio_cd = -EINVAL;
	mmc_pdata->gpio_cod = c->gpio_cd;
	} else {
	/* card detect pin on the mmc socket itself */
	mmc_pdata->gpio_cd = c->gpio_cd;
	mmc_pdata->gpio_cod = -EINVAL;
	}
	mmc_pdata->gpio_wp = c->gpio_wp;

	res = omap_device_register(pdev);
	if (res)
	pr_err("Could not late init MMC %s\n",
	c->name);
	}
	}

	#define MAX_OMAP_MMC_HWMOD_NAME_LEN 16

	static void __init omap_hsmmc_init_one(struct omap2_hsmmc_info *hsmmcinfo,
	int ctrl_nr)
	{
	struct omap_hwmod *oh;
	struct omap_hwmod *ohs[1];
	struct omap_device *od;
	struct platform_device *pdev;
	char oh_name[MAX_OMAP_MMC_HWMOD_NAME_LEN];
	struct omap_hsmmc_platform_data *mmc_data;
	struct omap_hsmmc_dev_attr *mmc_dev_attr;
	char *name;
	int res;

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

	res = omap_hsmmc_pdata_init(hsmmcinfo, mmc_data);
	if (res < 0)
	goto free_mmc;

	omap_hsmmc_mux(mmc_data, (ctrl_nr - 1));

	name = "omap_hsmmc";
	res = snprintf(oh_name, MAX_OMAP_MMC_HWMOD_NAME_LEN,
	"mmc%d", ctrl_nr);
	WARN(res >= MAX_OMAP_MMC_HWMOD_NAME_LEN,
	"String buffer overflow in MMC%d device setup\n", ctrl_nr);

	oh = omap_hwmod_lookup(oh_name);
	if (!oh) {
	pr_err("Could not look up %s\n", oh_name);
	goto free_name;
	}
	ohs[0] = oh;
	if (oh->dev_attr != NULL) {
	mmc_dev_attr = oh->dev_attr;
	mmc_data->controller_flags = mmc_dev_attr->flags;
	/*
	* erratum 2.1.1.128 doesn't apply if board has
	* a transceiver is attached
	*/
	if (hsmmcinfo->transceiver)
	mmc_data->controller_flags &=
	~OMAP_HSMMC_BROKEN_MULTIBLOCK_READ;
	}

	pdev = platform_device_alloc(name, ctrl_nr - 1);
	if (!pdev) {
	pr_err("Could not allocate pdev for %s\n", name);
	goto free_name;
	}
	dev_set_name(&pdev->dev, "%s.%d", pdev->name, pdev->id);

	od = omap_device_alloc(pdev, ohs, 1);
	if (IS_ERR(od)) {
	pr_err("Could not allocate od for %s\n", name);
	goto put_pdev;
	}

	res = platform_device_add_data(pdev, mmc_data,
	sizeof(struct omap_hsmmc_platform_data));
	if (res) {
	pr_err("Could not add pdata for %s\n", name);
	goto put_pdev;
	}

	hsmmcinfo->pdev = pdev;

	if (hsmmcinfo->deferred)
	goto free_mmc;

	res = omap_device_register(pdev);
	if (res) {
	pr_err("Could not register od for %s\n", name);
	goto free_od;
	}

	goto free_mmc;

	free_od:
	omap_device_delete(od);

	put_pdev:
	platform_device_put(pdev);

	free_name:
	kfree(mmc_data->name);

	free_mmc:
	kfree(mmc_data);
	}

	void __init omap_hsmmc_init(struct omap2_hsmmc_info *controllers)
	{
	if (omap_hsmmc_done)
	return;

	omap_hsmmc_done = 1;

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

	for (; controllers->mmc; controllers++)
	omap_hsmmc_init_one(controllers, controllers->mmc);

	}

	#endif