diff options
Diffstat (limited to 'arch/arm/mach-omap2/mmc-twl4030.c')
| -rw-r--r-- | arch/arm/mach-omap2/mmc-twl4030.c | 542 |
1 files changed, 0 insertions, 542 deletions
diff --git a/arch/arm/mach-omap2/mmc-twl4030.c b/arch/arm/mach-omap2/mmc-twl4030.c deleted file mode 100644 index 8afe9dd3f15..00000000000 --- a/arch/arm/mach-omap2/mmc-twl4030.c +++ /dev/null @@ -1,542 +0,0 @@ -/* - * linux/arch/arm/mach-omap2/mmc-twl4030.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/err.h> -#include <linux/io.h> -#include <linux/module.h> -#include <linux/platform_device.h> -#include <linux/interrupt.h> -#include <linux/delay.h> -#include <linux/gpio.h> -#include <linux/mmc/host.h> -#include <linux/regulator/consumer.h> - -#include <mach/hardware.h> -#include <plat/control.h> -#include <plat/mmc.h> -#include <plat/board.h> - -#include "mmc-twl4030.h" - - -#if defined(CONFIG_REGULATOR) && \ - (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 twl_mmc_controller { - struct omap_mmc_platform_data *mmc; - /* Vcc == configured supply - * Vcc_alt == optional - * - MMC1, supply for DAT4..DAT7 - * - MMC2/MMC2, external level shifter voltage supply, for - * chip (SDIO, eMMC, etc) or transceiver (MMC2 only) - */ - struct regulator *vcc; - struct regulator *vcc_aux; - char name[HSMMC_NAME_LEN + 1]; -} hsmmc[OMAP34XX_NR_MMC]; - -static int twl_mmc_card_detect(int irq) -{ - unsigned i; - - for (i = 0; i < ARRAY_SIZE(hsmmc); i++) { - struct omap_mmc_platform_data *mmc; - - mmc = hsmmc[i].mmc; - if (!mmc) - continue; - if (irq != mmc->slots[0].card_detect_irq) - continue; - - /* NOTE: assumes card detect signal is active-low */ - return !gpio_get_value_cansleep(mmc->slots[0].switch_pin); - } - return -ENOSYS; -} - -static int twl_mmc_get_ro(struct device *dev, int slot) -{ - struct omap_mmc_platform_data *mmc = dev->platform_data; - - /* NOTE: assumes write protect signal is active-high */ - return gpio_get_value_cansleep(mmc->slots[0].gpio_wp); -} - -static int twl_mmc_get_cover_state(struct device *dev, int slot) -{ - struct omap_mmc_platform_data *mmc = dev->platform_data; - - /* NOTE: assumes card detect signal is active-low */ - return !gpio_get_value_cansleep(mmc->slots[0].switch_pin); -} - -/* - * MMC Slot Initialization. - */ -static int twl_mmc_late_init(struct device *dev) -{ - struct omap_mmc_platform_data *mmc = dev->platform_data; - int ret = 0; - int i; - - /* MMC/SD/SDIO doesn't require a card detect switch */ - if (gpio_is_valid(mmc->slots[0].switch_pin)) { - ret = gpio_request(mmc->slots[0].switch_pin, "mmc_cd"); - if (ret) - goto done; - ret = gpio_direction_input(mmc->slots[0].switch_pin); - if (ret) - goto err; - } - - /* require at least main regulator */ - for (i = 0; i < ARRAY_SIZE(hsmmc); i++) { - if (hsmmc[i].name == mmc->slots[0].name) { - struct regulator *reg; - - hsmmc[i].mmc = mmc; - - reg = regulator_get(dev, "vmmc"); - if (IS_ERR(reg)) { - dev_dbg(dev, "vmmc regulator missing\n"); - /* HACK: until fixed.c regulator is usable, - * we don't require a main regulator - * for MMC2 or MMC3 - */ - if (i != 0) - break; - ret = PTR_ERR(reg); - hsmmc[i].vcc = NULL; - goto err; - } - hsmmc[i].vcc = reg; - mmc->slots[0].ocr_mask = mmc_regulator_get_ocrmask(reg); - - /* allow an aux regulator */ - reg = regulator_get(dev, "vmmc_aux"); - hsmmc[i].vcc_aux = IS_ERR(reg) ? NULL : reg; - - /* UGLY HACK: workaround regulator framework bugs. - * When the bootloader leaves a supply active, it's - * initialized with zero usecount ... and we can't - * disable it without first enabling it. Until the - * framework is fixed, we need a workaround like this - * (which is safe for MMC, but not in general). - */ - if (regulator_is_enabled(hsmmc[i].vcc) > 0) { - regulator_enable(hsmmc[i].vcc); - regulator_disable(hsmmc[i].vcc); - } - if (hsmmc[i].vcc_aux) { - if (regulator_is_enabled(reg) > 0) { - regulator_enable(reg); - regulator_disable(reg); - } - } - - break; - } - } - - return 0; - -err: - gpio_free(mmc->slots[0].switch_pin); -done: - mmc->slots[0].card_detect_irq = 0; - mmc->slots[0].card_detect = NULL; - - dev_err(dev, "err %d configuring card detect\n", ret); - return ret; -} - -static void twl_mmc_cleanup(struct device *dev) -{ - struct omap_mmc_platform_data *mmc = dev->platform_data; - int i; - - gpio_free(mmc->slots[0].switch_pin); - for(i = 0; i < ARRAY_SIZE(hsmmc); i++) { - regulator_put(hsmmc[i].vcc); - regulator_put(hsmmc[i].vcc_aux); - } -} - -#ifdef CONFIG_PM - -static int twl_mmc_suspend(struct device *dev, int slot) -{ - struct omap_mmc_platform_data *mmc = dev->platform_data; - - disable_irq(mmc->slots[0].card_detect_irq); - return 0; -} - -static int twl_mmc_resume(struct device *dev, int slot) -{ - struct omap_mmc_platform_data *mmc = dev->platform_data; - - enable_irq(mmc->slots[0].card_detect_irq); - return 0; -} - -#else -#define twl_mmc_suspend NULL -#define twl_mmc_resume NULL -#endif - -#if defined(CONFIG_ARCH_OMAP3) && defined(CONFIG_PM) - -static int twl4030_mmc_get_context_loss(struct device *dev) -{ - /* FIXME: PM DPS not implemented yet */ - return 0; -} - -#else -#define twl4030_mmc_get_context_loss NULL -#endif - -static int twl_mmc1_set_power(struct device *dev, int slot, int power_on, - int vdd) -{ - u32 reg, prog_io; - int ret = 0; - struct twl_mmc_controller *c = &hsmmc[0]; - 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); - - ret = mmc_regulator_set_ocr(c->vcc, vdd); - - /* 100ms delay required for PBIAS configuration */ - msleep(100); - 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_PBIASLITEPWRDNZ0; - omap_ctrl_writel(reg, control_pbias_offset); - - ret = mmc_regulator_set_ocr(c->vcc, 0); - - /* 100ms delay required for PBIAS configuration */ - msleep(100); - reg = omap_ctrl_readl(control_pbias_offset); - reg |= (OMAP2_PBIASSPEEDCTRL0 | OMAP2_PBIASLITEPWRDNZ0 | - OMAP2_PBIASLITEVMODE0); - omap_ctrl_writel(reg, control_pbias_offset); - } - - return ret; -} - -static int twl_mmc23_set_power(struct device *dev, int slot, int power_on, int vdd) -{ - int ret = 0; - struct twl_mmc_controller *c = NULL; - struct omap_mmc_platform_data *mmc = dev->platform_data; - int i; - - for (i = 1; i < ARRAY_SIZE(hsmmc); i++) { - if (mmc == hsmmc[i].mmc) { - c = &hsmmc[i]; - break; - } - } - - if (c == NULL) - return -ENODEV; - - /* If we don't see a Vcc regulator, assume it's a fixed - * voltage always-on regulator. - */ - if (!c->vcc) - return 0; - - /* - * Assume Vcc regulator is used only to power the card ... OMAP - * VDDS is used to power the pins, optionally with a transceiver to - * support cards using voltages other than VDDS (1.8V nominal). When a - * transceiver is used, DAT3..7 are muxed as transceiver control pins. - * - * In some cases this regulator won't support enable/disable; - * e.g. it's a fixed rail for a WLAN chip. - * - * In other cases vcc_aux switches interface power. Example, for - * eMMC cards it represents VccQ. Sometimes transceivers or SDIO - * chips/cards need an interface voltage rail too. - */ - 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); - } - ret = mmc_regulator_set_ocr(c->vcc, vdd); - /* enable interface voltage rail, if needed */ - if (ret == 0 && c->vcc_aux) { - ret = regulator_enable(c->vcc_aux); - if (ret < 0) - ret = mmc_regulator_set_ocr(c->vcc, 0); - } - } else { - if (c->vcc_aux && (ret = regulator_is_enabled(c->vcc_aux)) > 0) - ret = regulator_disable(c->vcc_aux); - if (ret == 0) - ret = mmc_regulator_set_ocr(c->vcc, 0); - } - - return ret; -} - -static int twl_mmc1_set_sleep(struct device *dev, int slot, int sleep, int vdd, - int cardsleep) -{ - struct twl_mmc_controller *c = &hsmmc[0]; - int mode = sleep ? REGULATOR_MODE_STANDBY : REGULATOR_MODE_NORMAL; - - return regulator_set_mode(c->vcc, mode); -} - -static int twl_mmc23_set_sleep(struct device *dev, int slot, int sleep, int vdd, - int cardsleep) -{ - struct twl_mmc_controller *c = NULL; - struct omap_mmc_platform_data *mmc = dev->platform_data; - int i, err, mode; - - for (i = 1; i < ARRAY_SIZE(hsmmc); i++) { - if (mmc == hsmmc[i].mmc) { - c = &hsmmc[i]; - break; - } - } - - if (c == NULL) - return -ENODEV; - - /* - * If we don't see a Vcc regulator, assume it's a fixed - * voltage always-on regulator. - */ - if (!c->vcc) - return 0; - - mode = sleep ? REGULATOR_MODE_STANDBY : REGULATOR_MODE_NORMAL; - - if (!c->vcc_aux) - return regulator_set_mode(c->vcc, mode); - - if (cardsleep) { - /* VCC can be turned off if card is asleep */ - struct regulator *vcc_aux = c->vcc_aux; - - c->vcc_aux = NULL; - if (sleep) - err = twl_mmc23_set_power(dev, slot, 0, 0); - else - err = twl_mmc23_set_power(dev, slot, 1, vdd); - c->vcc_aux = vcc_aux; - } else - err = regulator_set_mode(c->vcc, mode); - if (err) - return err; - return regulator_set_mode(c->vcc_aux, mode); -} - -static struct omap_mmc_platform_data *hsmmc_data[OMAP34XX_NR_MMC] __initdata; - -void __init twl4030_mmc_init(struct twl4030_hsmmc_info *controllers) -{ - struct twl4030_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; - nr_hsmmc = 2; - } else { - control_pbias_offset = OMAP343X_CONTROL_PBIAS_LITE; - control_devconf1_offset = OMAP343X_CONTROL_DEVCONF1; - } - - for (c = controllers; c->mmc; c++) { - struct twl_mmc_controller *twl = 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(twl->name, c->name, HSMMC_NAME_LEN); - else - snprintf(twl->name, ARRAY_SIZE(twl->name), - "mmc%islot%i", c->mmc, 1); - mmc->slots[0].name = twl->name; - mmc->nr_slots = 1; - mmc->slots[0].wires = c->wires; - mmc->slots[0].internal_clock = !c->ext_clock; - mmc->dma_mask = 0xffffffff; - mmc->init = twl_mmc_late_init; - - /* note: twl4030 card detect GPIOs can disable VMMCx ... */ - if (gpio_is_valid(c->gpio_cd)) { - mmc->cleanup = twl_mmc_cleanup; - mmc->suspend = twl_mmc_suspend; - mmc->resume = twl_mmc_resume; - - mmc->slots[0].switch_pin = c->gpio_cd; - mmc->slots[0].card_detect_irq = gpio_to_irq(c->gpio_cd); - if (c->cover_only) - mmc->slots[0].get_cover_state = twl_mmc_get_cover_state; - else - mmc->slots[0].card_detect = twl_mmc_card_detect; - } else - mmc->slots[0].switch_pin = -EINVAL; - - mmc->get_context_loss_count = - twl4030_mmc_get_context_loss; - - /* write protect normally uses an OMAP gpio */ - if (gpio_is_valid(c->gpio_wp)) { - gpio_request(c->gpio_wp, "mmc_wp"); - gpio_direction_input(c->gpio_wp); - - mmc->slots[0].gpio_wp = c->gpio_wp; - mmc->slots[0].get_ro = twl_mmc_get_ro; - } else - mmc->slots[0].gpio_wp = -EINVAL; - - 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].set_power = twl_mmc1_set_power; - mmc->slots[0].set_sleep = twl_mmc1_set_sleep; - - /* 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].set_power = twl_mmc23_set_power; - mmc->slots[0].set_sleep = twl_mmc23_set_sleep; - 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 |