1 files changed, 524 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/hsmmc.c b/arch/arm/mach-omap2/hsmmc.c
new file mode 100644
index 00000000..66868c5d
--- /dev/null
+++ b/arch/arm/mach-omap2/hsmmc.c
@@ -0,0 +1,524 @@
+/*
+ * 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/mmc.h>
+#include <plat/omap-pm.h>
+#include <plat/mux.h>
+#include <plat/omap_device.h>
+
+#include "mux.h"
+#include "hsmmc.h"
+#include "control.h"
+
+#if defined(CONFIG_MMC_OMAP_HS) || defined(CONFIG_MMC_OMAP_HS_MODULE)
+
+static u16 control_pbias_offset;
+static u16 control_devconf1_offset;
+static u16 control_mmc1;
+
+#define HSMMC_NAME_LEN	9
+
+#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 omap_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;
+
+	if (mmc->slots[0].remux)
+		mmc->slots[0].remux(dev, slot, 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->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 omap_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 omap4_hsmmc1_before_set_reg(struct device *dev, int slot,
+				  int power_on, int vdd)
+{
+	u32 reg;
+
+	/*
+	 * 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 ...
+	 */
+	reg = omap4_ctrl_pad_readl(control_pbias_offset);
+	reg &= ~(OMAP4_MMC1_PBIASLITE_PWRDNZ_MASK |
+		OMAP4_MMC1_PWRDNZ_MASK |
+		OMAP4_USBC1_ICUSB_PWRDNZ_MASK);
+	omap4_ctrl_pad_writel(reg, control_pbias_offset);
+}
+
+static void omap4_hsmmc1_after_set_reg(struct device *dev, int slot,
+				 int power_on, int vdd)
+{
+	u32 reg;
+	unsigned long timeout;
+
+	if (power_on) {
+		reg = omap4_ctrl_pad_readl(control_pbias_offset);
+		reg |= OMAP4_MMC1_PBIASLITE_PWRDNZ_MASK;
+		if ((1 << vdd) <= MMC_VDD_165_195)
+			reg &= ~OMAP4_MMC1_PBIASLITE_VMODE_MASK;
+		else
+			reg |= OMAP4_MMC1_PBIASLITE_VMODE_MASK;
+		reg |= (OMAP4_MMC1_PBIASLITE_PWRDNZ_MASK |
+			OMAP4_MMC1_PWRDNZ_MASK |
+			OMAP4_USBC1_ICUSB_PWRDNZ_MASK);
+		omap4_ctrl_pad_writel(reg, control_pbias_offset);
+
+		timeout = jiffies + msecs_to_jiffies(5);
+		do {
+			reg = omap4_ctrl_pad_readl(control_pbias_offset);
+			if (!(reg & OMAP4_MMC1_PBIASLITE_VMODE_ERROR_MASK))
+				break;
+			usleep_range(100, 200);
+		} while (!time_after(jiffies, timeout));
+
+		if (reg & OMAP4_MMC1_PBIASLITE_VMODE_ERROR_MASK) {
+			pr_err("Pbias Voltage is not same as LDO\n");
+			/* Caution : On VMODE_ERROR Power Down MMC IO */
+			reg &= ~(OMAP4_MMC1_PWRDNZ_MASK |
+				OMAP4_USBC1_ICUSB_PWRDNZ_MASK);
+			omap4_ctrl_pad_writel(reg, control_pbias_offset);
+		}
+	} else {
+		reg = omap4_ctrl_pad_readl(control_pbias_offset);
+		reg |= (OMAP4_MMC1_PBIASLITE_PWRDNZ_MASK |
+			OMAP4_MMC1_PWRDNZ_MASK |
+			OMAP4_MMC1_PBIASLITE_VMODE_MASK |
+			OMAP4_USBC1_ICUSB_PWRDNZ_MASK);
+		omap4_ctrl_pad_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 (mmc->slots[0].remux)
+		mmc->slots[0].remux(dev, slot, power_on);
+
+	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 int nop_mmc_set_power(struct device *dev, int slot, int power_on,
+							int vdd)
+{
+	return 0;
+}
+
+static inline void omap_hsmmc_mux(struct omap_mmc_platform_data *mmc_controller,
+			int controller_nr)
+{
+	if ((mmc_controller->slots[0].switch_pin > 0) && \
+		(mmc_controller->slots[0].switch_pin < OMAP_MAX_GPIO_LINES))
+		omap_mux_init_gpio(mmc_controller->slots[0].switch_pin,
+					OMAP_PIN_INPUT_PULLUP);
+	if ((mmc_controller->slots[0].gpio_wp > 0) && \
+		(mmc_controller->slots[0].gpio_wp < OMAP_MAX_GPIO_LINES))
+		omap_mux_init_gpio(mmc_controller->slots[0].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->slots[0].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->slots[0].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->slots[0].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->slots[0].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_mmc_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->slots[0].name = hc_name;
+	mmc->nr_slots = 1;
+	mmc->slots[0].caps = c->caps;
+	mmc->slots[0].internal_clock = !c->ext_clock;
+	mmc->dma_mask = 0xffffffff;
+	if (cpu_is_omap44xx())
+		mmc->reg_offset = OMAP4_MMC_REG_OFFSET;
+	else
+		mmc->reg_offset = 0;
+
+	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;
+
+	mmc->slots[0].remux = c->remux;
+	mmc->slots[0].init_card = c->init_card;
+
+	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;
+
+	if (c->no_off)
+		mmc->slots[0].no_off = 1;
+
+	if (c->no_off_init)
+		mmc->slots[0].no_regulator_off_init = c->no_off_init;
+
+	if (c->vcc_aux_disable_is_sleep)
+		mmc->slots[0].vcc_aux_disable_is_sleep = 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;
+
+	if (cpu_is_omap3517() || cpu_is_omap3505())
+		mmc->slots[0].set_power = nop_mmc_set_power;
+	else
+		mmc->slots[0].features |= HSMMC_HAS_PBIAS;
+
+	if (cpu_is_omap44xx() && (omap_rev() > OMAP4430_REV_ES1_0))
+		mmc->slots[0].features |= HSMMC_HAS_UPDATED_RESET;
+
+	switch (c->mmc) {
+	case 1:
+		if (mmc->slots[0].features & HSMMC_HAS_PBIAS) {
+			/* on-chip level shifting via PBIAS0/PBIAS1 */
+			if (cpu_is_omap44xx()) {
+				mmc->slots[0].before_set_reg =
+						omap4_hsmmc1_before_set_reg;
+				mmc->slots[0].after_set_reg =
+						omap4_hsmmc1_after_set_reg;
+			} else {
+				mmc->slots[0].before_set_reg =
+						omap_hsmmc1_before_set_reg;
+				mmc->slots[0].after_set_reg =
+						omap_hsmmc1_after_set_reg;
+			}
+		}
+
+		/* 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->slots[0].caps = c->caps;
+		}
+		break;
+	case 2:
+		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;
+		}
+		/* FALLTHROUGH */
+	case 3:
+		if (mmc->slots[0].features & HSMMC_HAS_PBIAS) {
+			/* off-chip level shifting, or none */
+			mmc->slots[0].before_set_reg = hsmmc23_before_set_reg;
+			mmc->slots[0].after_set_reg = NULL;
+		}
+		break;
+	case 4:
+	case 5:
+		mmc->slots[0].before_set_reg = NULL;
+		mmc->slots[0].after_set_reg = NULL;
+		break;
+	default:
+		pr_err("MMC%d configuration not supported!\n", c->mmc);
+		kfree(hc_name);
+		return -ENODEV;
+	}
+	return 0;
+}
+
+static struct omap_device_pm_latency omap_hsmmc_latency[] = {
+	[0] = {
+		.deactivate_func = omap_device_idle_hwmods,
+		.activate_func	 = omap_device_enable_hwmods,
+		.flags		 = OMAP_DEVICE_LATENCY_AUTO_ADJUST,
+	},
+	/*
+	 * XXX There should also be an entry here to power off/on the
+	 * MMC regulators/PBIAS cells, etc.
+	 */
+};
+
+#define MAX_OMAP_MMC_HWMOD_NAME_LEN		16
+
+void __init omap_init_hsmmc(struct omap2_hsmmc_info *hsmmcinfo, int ctrl_nr)
+{
+	struct omap_hwmod *oh;
+	struct omap_device *od;
+	struct omap_device_pm_latency *ohl;
+	char oh_name[MAX_OMAP_MMC_HWMOD_NAME_LEN];
+	struct omap_mmc_platform_data *mmc_data;
+	struct omap_mmc_dev_attr *mmc_dev_attr;
+	char *name;
+	int l;
+	int ohl_cnt = 0;
+
+	mmc_data = kzalloc(sizeof(struct omap_mmc_platform_data), GFP_KERNEL);
+	if (!mmc_data) {
+		pr_err("Cannot allocate memory for mmc device!\n");
+		goto done;
+	}
+
+	if (omap_hsmmc_pdata_init(hsmmcinfo, mmc_data) < 0) {
+		pr_err("%s fails!\n", __func__);
+		goto done;
+	}
+	omap_hsmmc_mux(mmc_data, (ctrl_nr - 1));
+
+	name = "omap_hsmmc";
+	ohl = omap_hsmmc_latency;
+	ohl_cnt = ARRAY_SIZE(omap_hsmmc_latency);
+
+	l = snprintf(oh_name, MAX_OMAP_MMC_HWMOD_NAME_LEN,
+		     "mmc%d", ctrl_nr);
+	WARN(l >= 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);
+		kfree(mmc_data->slots[0].name);
+		goto done;
+	}
+
+	if (oh->dev_attr != NULL) {
+		mmc_dev_attr = oh->dev_attr;
+		mmc_data->controller_flags = mmc_dev_attr->flags;
+	}
+
+	od = omap_device_build(name, ctrl_nr - 1, oh, mmc_data,
+		sizeof(struct omap_mmc_platform_data), ohl, ohl_cnt, false);
+	if (IS_ERR(od)) {
+		WARN(1, "Can't build omap_device for %s:%s.\n", name, oh->name);
+		kfree(mmc_data->slots[0].name);
+		goto done;
+	}
+	/*
+	 * return device handle to board setup code
+	 * required to populate for regulator framework structure
+	 */
+	hsmmcinfo->dev = &od->pdev.dev;
+
+done:
+	kfree(mmc_data);
+}
+
+void __init omap2_hsmmc_init(struct omap2_hsmmc_info *controllers)
+{
+	u32 reg;
+
+	if (!cpu_is_omap44xx()) {
+		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;
+		}
+	} else {
+		control_pbias_offset =
+			OMAP4_CTRL_MODULE_PAD_CORE_CONTROL_PBIASLITE;
+		control_mmc1 = OMAP4_CTRL_MODULE_PAD_CORE_CONTROL_MMC1;
+		reg = omap4_ctrl_pad_readl(control_mmc1);
+		reg |= (OMAP4_SDMMC1_PUSTRENGTH_GRP0_MASK |
+			OMAP4_SDMMC1_PUSTRENGTH_GRP1_MASK);
+		reg &= ~(OMAP4_SDMMC1_PUSTRENGTH_GRP2_MASK |
+			OMAP4_SDMMC1_PUSTRENGTH_GRP3_MASK);
+		reg |= (OMAP4_USBC1_DR0_SPEEDCTRL_MASK|
+			OMAP4_SDMMC1_DR1_SPEEDCTRL_MASK |
+			OMAP4_SDMMC1_DR2_SPEEDCTRL_MASK);
+		omap4_ctrl_pad_writel(reg, control_mmc1);
+	}
+
+	for (; controllers->mmc; controllers++)
+		omap_init_hsmmc(controllers, controllers->mmc);
+
+}
+
+#endif