| /* |
| * 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/platform_data/gpio-omap.h> |
| |
| #include "soc.h" |
| #include "omap_device.h" |
| #include "omap-pm.h" |
| |
| #include "mux.h" |
| #include "mmc.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. |
| */ |
| reg = omap4_ctrl_pad_readl(control_pbias_offset); |
| reg &= ~(OMAP4_MMC1_PBIASLITE_PWRDNZ_MASK | |
| OMAP4_MMC1_PWRDNZ_MASK | |
| OMAP4_MMC1_PBIASLITE_VMODE_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_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_ctrl_pad_writel(reg, control_pbias_offset); |
| } |
| } |
| } |
| |
| static void hsmmc2_select_input_clk_src(struct omap_mmc_platform_data *mmc) |
| { |
| u32 reg; |
| |
| reg = omap_ctrl_readl(control_devconf1_offset); |
| if (mmc->slots[0].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 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) |
| hsmmc2_select_input_clk_src(mmc); |
| } |
| |
| static int am35x_hsmmc2_set_power(struct device *dev, int slot, |
| int power_on, int vdd) |
| { |
| struct omap_mmc_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 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 (gpio_is_valid(mmc_controller->slots[0].switch_pin) && |
| (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 (gpio_is_valid(mmc_controller->slots[0].gpio_wp) && |
| (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].pm_caps = c->pm_caps; |
| mmc->slots[0].internal_clock = !c->ext_clock; |
| mmc->max_freq = c->max_freq; |
| 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 |
| */ |
| if (soc_is_am35xx()) |
| mmc->slots[0].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->slots[0].ocr_mask = c->ocr_mask; |
| |
| if (!soc_is_am35xx()) |
| 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; |
| } |
| } |
| |
| if (soc_is_am35xx()) |
| mmc->slots[0].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->slots[0].caps = c->caps; |
| } |
| break; |
| case 2: |
| if (soc_is_am35xx()) |
| mmc->slots[0].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->slots[0].features & HSMMC_HAS_PBIAS) { |
| /* off-chip level shifting, or none */ |
| mmc->slots[0].before_set_reg = hsmmc2_before_set_reg; |
| mmc->slots[0].after_set_reg = NULL; |
| } |
| break; |
| case 3: |
| 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 int omap_hsmmc_done; |
| |
| void omap_hsmmc_late_init(struct omap2_hsmmc_info *c) |
| { |
| struct platform_device *pdev; |
| struct omap_mmc_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; |
| |
| mmc_pdata->slots[0].switch_pin = c->gpio_cd; |
| mmc_pdata->slots[0].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_mmc_platform_data *mmc_data; |
| struct omap_mmc_dev_attr *mmc_dev_attr; |
| char *name; |
| int res; |
| |
| mmc_data = kzalloc(sizeof(struct omap_mmc_platform_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_mmc_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->slots[0].name); |
| |
| free_mmc: |
| kfree(mmc_data); |
| } |
| |
| void __init omap_hsmmc_init(struct omap2_hsmmc_info *controllers) |
| { |
| u32 reg; |
| |
| if (omap_hsmmc_done) |
| return; |
| |
| omap_hsmmc_done = 1; |
| |
| 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_SDMMC1_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_hsmmc_init_one(controllers, controllers->mmc); |
| |
| } |
| |
| #endif |