arch/arm/mach-omap2/hsmmc.c - kernel/msm-4.19 - 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 <mach/hardware.h>
 #include <plat/control.h>
 #include <plat/mmc.h>
 #include <plat/omap-pm.h>

 #include "hsmmc.h"

 #if 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 hsmmc_controller {
 	char				name[HSMMC_NAME_LEN + 1];
 } hsmmc[OMAP34XX_NR_MMC];

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

 static int hsmmc_get_context_loss(struct device *dev)
 {
 	return omap_pm_get_dev_context_loss_count(dev);
 }

 #else
 #define hsmmc_get_context_loss NULL
 #endif

 static void hsmmc1_before_set_reg(struct device *dev, int slot,
 				  int power_on, int vdd)
 {
 	u32 reg, prog_io;
 	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);
 		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 hsmmc1_after_set_reg(struct device *dev, int slot,
 				 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 hsmmc23_before_set_reg(struct device *dev, int slot,
 				   int power_on, int vdd)
 {
 	struct omap_mmc_platform_data *mmc = dev->platform_data;

 	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);
 		}
 	}
 }

 static struct omap_mmc_platform_data *hsmmc_data[OMAP34XX_NR_MMC] __initdata;

 void __init omap2_hsmmc_init(struct omap2_hsmmc_info *controllers)
 {
 	struct omap2_hsmmc_info *c;
 	int nr_hsmmc = ARRAY_SIZE(hsmmc_data);
 	int i;

 	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 (c = controllers; c->mmc; c++) {
 		struct hsmmc_controller *hc = 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");
 			goto done;
 		}

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

 		mmc->get_context_loss_count = hsmmc_get_context_loss;

 		mmc->slots[0].switch_pin = c->gpio_cd;
 		mmc->slots[0].gpio_wp = c->gpio_wp;

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

 		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].before_set_reg = hsmmc1_before_set_reg;
 			mmc->slots[0].after_set_reg = hsmmc1_after_set_reg;

 			/* Omap3630 HSMMC1 supports only 4-bit */
 			if (cpu_is_omap3630() && c->wires > 4) {
 				c->wires = 4;
 				mmc->slots[0].wires = c->wires;
 			}
 			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].before_set_reg = hsmmc23_before_set_reg;
 			mmc->slots[0].after_set_reg = NULL;
 			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;
 	}

 done:
 	for (i = 0; i < nr_hsmmc; i++)
 		kfree(hsmmc_data[i]);
 }

 #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 <mach/hardware.h>
	#include <plat/control.h>
	#include <plat/mmc.h>
	#include <plat/omap-pm.h>

	#include "hsmmc.h"

	#if 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 hsmmc_controller {
	char name[HSMMC_NAME_LEN + 1];
	} hsmmc[OMAP34XX_NR_MMC];

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

	static int hsmmc_get_context_loss(struct device *dev)
	{
	return omap_pm_get_dev_context_loss_count(dev);
	}

	#else
	#define hsmmc_get_context_loss NULL
	#endif

	static void hsmmc1_before_set_reg(struct device *dev, int slot,
	int power_on, int vdd)
	{
	u32 reg, prog_io;
	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);
	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 hsmmc1_after_set_reg(struct device *dev, int slot,
	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 hsmmc23_before_set_reg(struct device *dev, int slot,
	int power_on, int vdd)
	{
	struct omap_mmc_platform_data *mmc = dev->platform_data;

	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);
	}
	}
	}

	static struct omap_mmc_platform_data *hsmmc_data[OMAP34XX_NR_MMC] __initdata;

	void __init omap2_hsmmc_init(struct omap2_hsmmc_info *controllers)
	{
	struct omap2_hsmmc_info *c;
	int nr_hsmmc = ARRAY_SIZE(hsmmc_data);
	int i;

	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 (c = controllers; c->mmc; c++) {
	struct hsmmc_controller *hc = 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");
	goto done;
	}

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

	mmc->get_context_loss_count = hsmmc_get_context_loss;

	mmc->slots[0].switch_pin = c->gpio_cd;
	mmc->slots[0].gpio_wp = c->gpio_wp;

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

	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].before_set_reg = hsmmc1_before_set_reg;
	mmc->slots[0].after_set_reg = hsmmc1_after_set_reg;

	/* Omap3630 HSMMC1 supports only 4-bit */
	if (cpu_is_omap3630() && c->wires > 4) {
	c->wires = 4;
	mmc->slots[0].wires = c->wires;
	}
	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].before_set_reg = hsmmc23_before_set_reg;
	mmc->slots[0].after_set_reg = NULL;
	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;
	}

	done:
	for (i = 0; i < nr_hsmmc; i++)
	kfree(hsmmc_data[i]);
	}

	#endif