diff options
Diffstat (limited to 'arch/arm/mach-omap2/hsmmc.c')
| -rw-r--r-- | arch/arm/mach-omap2/hsmmc.c | 601 |
1 files changed, 601 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..b0268eaf --- /dev/null +++ b/arch/arm/mach-omap2/hsmmc.c @@ -0,0 +1,601 @@ +/* + * 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 <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. + */ + 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->dma_mask = 0xffffffff; + 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 (cpu_is_omap3505() || cpu_is_omap3517()) + 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 (!cpu_is_omap3517() && !cpu_is_omap3505()) + 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 (cpu_is_omap3517() || cpu_is_omap3505()) + 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 (cpu_is_omap3517() || cpu_is_omap3505()) + 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, NULL, 0); + if (!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 |