diff options
| -rw-r--r-- | arch/arm/configs/rx51_defconfig | 4 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/mmc-twl4030.c | 352 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/mmc-twl4030.h | 4 | ||||
| -rw-r--r-- | arch/arm/plat-omap/include/plat/mmc.h | 28 | ||||
| -rw-r--r-- | drivers/mmc/host/omap_hsmmc.c | 352 |
5 files changed, 391 insertions, 349 deletions
diff --git a/arch/arm/configs/rx51_defconfig b/arch/arm/configs/rx51_defconfig index b6eeebb..426ae94 100644 --- a/arch/arm/configs/rx51_defconfig +++ b/arch/arm/configs/rx51_defconfig @@ -1354,7 +1354,7 @@ CONFIG_USB_OTG_UTILS=y # CONFIG_USB_GPIO_VBUS is not set # CONFIG_ISP1301_OMAP is not set CONFIG_TWL4030_USB=y -CONFIG_MMC=y +CONFIG_MMC=m # CONFIG_MMC_DEBUG is not set # CONFIG_MMC_UNSAFE_RESUME is not set @@ -1362,7 +1362,7 @@ CONFIG_MMC=y # MMC/SD/SDIO Card Drivers # CONFIG_MMC_BLOCK=m -CONFIG_MMC_BLOCK_BOUNCE=y +# CONFIG_MMC_BLOCK_BOUNCE is not set # CONFIG_SDIO_UART is not set # CONFIG_MMC_TEST is not set diff --git a/arch/arm/mach-omap2/mmc-twl4030.c b/arch/arm/mach-omap2/mmc-twl4030.c index 8afe9dd..6f8f29e 100644 --- a/arch/arm/mach-omap2/mmc-twl4030.c +++ b/arch/arm/mach-omap2/mmc-twl4030.c @@ -9,26 +9,17 @@ * 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/kernel.h> +#include <linux/slab.h> +#include <linux/string.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)) +#if defined(CONFIG_MMC_OMAP_HS) || defined(CONFIG_MMC_OMAP_HS_MODULE) static u16 control_pbias_offset; static u16 control_devconf1_offset; @@ -36,168 +27,9 @@ 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) @@ -210,12 +42,10 @@ static int twl4030_mmc_get_context_loss(struct device *dev) #define twl4030_mmc_get_context_loss NULL #endif -static int twl_mmc1_set_power(struct device *dev, int slot, int power_on, - int vdd) +static void hsmmc1_before_set_reg(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; /* @@ -255,11 +85,22 @@ static int twl_mmc1_set_power(struct device *dev, int slot, int power_on, } 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; - ret = mmc_regulator_set_ocr(c->vcc, vdd); + /* 100ms delay required for PBIAS configuration */ + msleep(100); - /* 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) @@ -269,60 +110,19 @@ static int twl_mmc1_set_power(struct device *dev, int slot, int power_on, 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) +static void hsmmc23_before_set_reg(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 */ + /* Only MMC2 supports a CLKIN */ if (mmc->slots[0].internal_clock) { u32 reg; @@ -330,76 +130,7 @@ static int twl_mmc23_set_power(struct device *dev, int slot, int power_on, int v 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; @@ -413,7 +144,6 @@ void __init twl4030_mmc_init(struct twl4030_hsmmc_info *controllers) 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; @@ -448,35 +178,15 @@ void __init twl4030_mmc_init(struct twl4030_hsmmc_info *controllers) 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].switch_pin = c->gpio_cd; + mmc->slots[0].gpio_wp = 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->cover_only) + mmc->slots[0].cover = 1; if (c->nonremovable) mmc->slots[0].nonremovable = 1; @@ -495,8 +205,8 @@ void __init twl4030_mmc_init(struct twl4030_hsmmc_info *controllers) 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; + 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) { @@ -512,8 +222,8 @@ void __init twl4030_mmc_init(struct twl4030_hsmmc_info *controllers) /* 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; + 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); diff --git a/arch/arm/mach-omap2/mmc-twl4030.h b/arch/arm/mach-omap2/mmc-twl4030.h index a47e685..87d67c1 100644 --- a/arch/arm/mach-omap2/mmc-twl4030.h +++ b/arch/arm/mach-omap2/mmc-twl4030.h @@ -21,9 +21,7 @@ struct twl4030_hsmmc_info { int ocr_mask; /* temporary HACK */ }; -#if defined(CONFIG_REGULATOR) && \ - (defined(CONFIG_MMC_OMAP) || defined(CONFIG_MMC_OMAP_MODULE) || \ - defined(CONFIG_MMC_OMAP_HS) || defined(CONFIG_MMC_OMAP_HS_MODULE)) +#if defined(CONFIG_MMC_OMAP_HS) || defined(CONFIG_MMC_OMAP_HS_MODULE) void twl4030_mmc_init(struct twl4030_hsmmc_info *); diff --git a/arch/arm/plat-omap/include/plat/mmc.h b/arch/arm/plat-omap/include/plat/mmc.h index 2993713..515701b 100644 --- a/arch/arm/plat-omap/include/plat/mmc.h +++ b/arch/arm/plat-omap/include/plat/mmc.h @@ -55,12 +55,12 @@ struct omap_mmc_platform_data { unsigned int max_freq; /* switch the bus to a new slot */ - int (* switch_slot)(struct device *dev, int slot); + int (*switch_slot)(struct device *dev, int slot); /* initialize board-specific MMC functionality, can be NULL if * not supported */ - int (* init)(struct device *dev); - void (* cleanup)(struct device *dev); - void (* shutdown)(struct device *dev); + int (*init)(struct device *dev); + void (*cleanup)(struct device *dev); + void (*shutdown)(struct device *dev); /* To handle board related suspend/resume functionality for MMC */ int (*suspend)(struct device *dev, int slot); @@ -99,11 +99,18 @@ struct omap_mmc_platform_data { int switch_pin; /* gpio (card detect) */ int gpio_wp; /* gpio (write protect) */ - int (* set_bus_mode)(struct device *dev, int slot, int bus_mode); - int (* set_power)(struct device *dev, int slot, int power_on, int vdd); - int (* get_ro)(struct device *dev, int slot); + int (*set_bus_mode)(struct device *dev, int slot, int bus_mode); + int (*set_power)(struct device *dev, int slot, + int power_on, int vdd); + int (*get_ro)(struct device *dev, int slot); int (*set_sleep)(struct device *dev, int slot, int sleep, int vdd, int cardsleep); + /* Call back before enabling / disabling regulators */ + void (*before_set_reg)(struct device *dev, int slot, + int power_on, int vdd); + /* Call back after enabling / disabling regulators */ + void (*after_set_reg)(struct device *dev, int slot, + int power_on, int vdd); /* return MMC cover switch state, can be NULL if not supported. * @@ -111,14 +118,14 @@ struct omap_mmc_platform_data { * 0 - closed * 1 - open */ - int (* get_cover_state)(struct device *dev, int slot); + int (*get_cover_state)(struct device *dev, int slot); const char *name; u32 ocr_mask; /* Card detection IRQs */ int card_detect_irq; - int (* card_detect)(int irq); + int (*card_detect)(struct device *dev, int slot); unsigned int ban_openended:1; @@ -126,7 +133,8 @@ struct omap_mmc_platform_data { }; /* called from board-specific card detection service routine */ -extern void omap_mmc_notify_cover_event(struct device *dev, int slot, int is_closed); +extern void omap_mmc_notify_cover_event(struct device *dev, int slot, + int is_closed); #if defined(CONFIG_MMC_OMAP) || defined(CONFIG_MMC_OMAP_MODULE) || \ defined(CONFIG_MMC_OMAP_HS) || defined(CONFIG_MMC_OMAP_HS_MODULE) diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c index 4b23225..2c5e15d 100644 --- a/drivers/mmc/host/omap_hsmmc.c +++ b/drivers/mmc/host/omap_hsmmc.c @@ -30,6 +30,8 @@ #include <linux/mmc/core.h> #include <linux/io.h> #include <linux/semaphore.h> +#include <linux/gpio.h> +#include <linux/regulator/consumer.h> #include <plat/dma.h> #include <mach/hardware.h> #include <plat/board.h> @@ -146,6 +148,15 @@ struct omap_hsmmc_host { struct clk *fclk; struct clk *iclk; struct clk *dbclk; + /* + * vcc == configured supply + * vcc_aux == 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; struct semaphore sem; struct work_struct mmc_carddetect_work; void __iomem *base; @@ -171,10 +182,308 @@ struct omap_hsmmc_host { int vdd; int protect_card; int reqs_blocked; + int use_reg; struct omap_mmc_platform_data *pdata; }; +static int omap_hsmmc_card_detect(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); +} + +static int omap_hsmmc_get_wp(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 omap_hsmmc_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); +} + +#ifdef CONFIG_PM + +static int omap_hsmmc_suspend_cdirq(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 omap_hsmmc_resume_cdirq(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 omap_hsmmc_suspend_cdirq NULL +#define omap_hsmmc_resume_cdirq NULL + +#endif + +static int omap_hsmmc_1_set_power(struct device *dev, int slot, int power_on, + int vdd) +{ + struct omap_hsmmc_host *host = + platform_get_drvdata(to_platform_device(dev)); + int ret; + + if (mmc_slot(host).before_set_reg) + mmc_slot(host).before_set_reg(dev, slot, power_on, vdd); + + if (power_on) + ret = mmc_regulator_set_ocr(host->vcc, vdd); + else + ret = mmc_regulator_set_ocr(host->vcc, 0); + + if (mmc_slot(host).after_set_reg) + mmc_slot(host).after_set_reg(dev, slot, power_on, vdd); + + return ret; +} + +static int omap_hsmmc_23_set_power(struct device *dev, int slot, int power_on, + int vdd) +{ + struct omap_hsmmc_host *host = + platform_get_drvdata(to_platform_device(dev)); + int ret = 0; + + /* + * If we don't see a Vcc regulator, assume it's a fixed + * voltage always-on regulator. + */ + if (!host->vcc) + return 0; + + if (mmc_slot(host).before_set_reg) + mmc_slot(host).before_set_reg(dev, slot, power_on, vdd); + + /* + * 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) { + ret = mmc_regulator_set_ocr(host->vcc, vdd); + /* Enable interface voltage rail, if needed */ + if (ret == 0 && host->vcc_aux) { + ret = regulator_enable(host->vcc_aux); + if (ret < 0) + ret = mmc_regulator_set_ocr(host->vcc, 0); + } + } else { + if (host->vcc_aux) { + ret = regulator_is_enabled(host->vcc_aux); + if (ret > 0) + ret = regulator_disable(host->vcc_aux); + } + if (ret == 0) + ret = mmc_regulator_set_ocr(host->vcc, 0); + } + + if (mmc_slot(host).after_set_reg) + mmc_slot(host).after_set_reg(dev, slot, power_on, vdd); + + return ret; +} + +static int omap_hsmmc_1_set_sleep(struct device *dev, int slot, int sleep, + int vdd, int cardsleep) +{ + struct omap_hsmmc_host *host = + platform_get_drvdata(to_platform_device(dev)); + int mode = sleep ? REGULATOR_MODE_STANDBY : REGULATOR_MODE_NORMAL; + + return regulator_set_mode(host->vcc, mode); +} + +static int omap_hsmmc_23_set_sleep(struct device *dev, int slot, int sleep, + int vdd, int cardsleep) +{ + struct omap_hsmmc_host *host = + platform_get_drvdata(to_platform_device(dev)); + int err, mode; + + /* + * If we don't see a Vcc regulator, assume it's a fixed + * voltage always-on regulator. + */ + if (!host->vcc) + return 0; + + mode = sleep ? REGULATOR_MODE_STANDBY : REGULATOR_MODE_NORMAL; + + if (!host->vcc_aux) + return regulator_set_mode(host->vcc, mode); + + if (cardsleep) { + /* VCC can be turned off if card is asleep */ + if (sleep) + err = mmc_regulator_set_ocr(host->vcc, 0); + else + err = mmc_regulator_set_ocr(host->vcc, vdd); + } else + err = regulator_set_mode(host->vcc, mode); + if (err) + return err; + return regulator_set_mode(host->vcc_aux, mode); +} + +static int omap_hsmmc_gpio_init(struct omap_mmc_platform_data *pdata) +{ + int ret; + + if (gpio_is_valid(pdata->slots[0].switch_pin)) { + pdata->suspend = omap_hsmmc_suspend_cdirq; + pdata->resume = omap_hsmmc_resume_cdirq; + if (pdata->slots[0].cover) + pdata->slots[0].get_cover_state = + omap_hsmmc_get_cover_state; + else + pdata->slots[0].card_detect = omap_hsmmc_card_detect; + pdata->slots[0].card_detect_irq = + gpio_to_irq(pdata->slots[0].switch_pin); + ret = gpio_request(pdata->slots[0].switch_pin, "mmc_cd"); + if (ret) + return ret; + ret = gpio_direction_input(pdata->slots[0].switch_pin); + if (ret) + goto err_free_sp; + } else + pdata->slots[0].switch_pin = -EINVAL; + + if (gpio_is_valid(pdata->slots[0].gpio_wp)) { + pdata->slots[0].get_ro = omap_hsmmc_get_wp; + ret = gpio_request(pdata->slots[0].gpio_wp, "mmc_wp"); + if (ret) + goto err_free_cd; + ret = gpio_direction_input(pdata->slots[0].gpio_wp); + if (ret) + goto err_free_wp; + } else + pdata->slots[0].gpio_wp = -EINVAL; + + return 0; + +err_free_wp: + gpio_free(pdata->slots[0].gpio_wp); +err_free_cd: + if (gpio_is_valid(pdata->slots[0].switch_pin)) +err_free_sp: + gpio_free(pdata->slots[0].switch_pin); + return ret; +} + +static void omap_hsmmc_gpio_free(struct omap_mmc_platform_data *pdata) +{ + if (gpio_is_valid(pdata->slots[0].gpio_wp)) + gpio_free(pdata->slots[0].gpio_wp); + if (gpio_is_valid(pdata->slots[0].switch_pin)) + gpio_free(pdata->slots[0].switch_pin); +} + +static int omap_hsmmc_reg_get(struct omap_hsmmc_host *host) +{ + struct regulator *reg; + int ret = 0; + + switch (host->id) { + case OMAP_MMC1_DEVID: + /* On-chip level shifting via PBIAS0/PBIAS1 */ + mmc_slot(host).set_power = omap_hsmmc_1_set_power; + mmc_slot(host).set_sleep = omap_hsmmc_1_set_sleep; + break; + case OMAP_MMC2_DEVID: + case OMAP_MMC3_DEVID: + /* Off-chip level shifting, or none */ + mmc_slot(host).set_power = omap_hsmmc_23_set_power; + mmc_slot(host).set_sleep = omap_hsmmc_23_set_sleep; + break; + default: + pr_err("MMC%d configuration not supported!\n", host->id); + return -EINVAL; + } + + reg = regulator_get(host->dev, "vmmc"); + if (IS_ERR(reg)) { + dev_dbg(host->dev, "vmmc regulator missing\n"); + /* + * HACK: until fixed.c regulator is usable, + * we don't require a main regulator + * for MMC2 or MMC3 + */ + if (host->id == OMAP_MMC1_DEVID) { + ret = PTR_ERR(reg); + goto err; + } + } else { + host->vcc = reg; + mmc_slot(host).ocr_mask = mmc_regulator_get_ocrmask(reg); + + /* Allow an aux regulator */ + reg = regulator_get(host->dev, "vmmc_aux"); + host->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(host->vcc) > 0) { + regulator_enable(host->vcc); + regulator_disable(host->vcc); + } + if (host->vcc_aux) { + if (regulator_is_enabled(reg) > 0) { + regulator_enable(reg); + regulator_disable(reg); + } + } + } + + return 0; + +err: + mmc_slot(host).set_power = NULL; + mmc_slot(host).set_sleep = NULL; + return ret; +} + +static void omap_hsmmc_reg_put(struct omap_hsmmc_host *host) +{ + regulator_put(host->vcc); + regulator_put(host->vcc_aux); + mmc_slot(host).set_power = NULL; + mmc_slot(host).set_sleep = NULL; +} + /* * Stop clock to the card */ @@ -835,7 +1144,7 @@ static void omap_hsmmc_detect(struct work_struct *work) sysfs_notify(&host->mmc->class_dev.kobj, NULL, "cover_switch"); if (slot->card_detect) - carddetect = slot->card_detect(slot->card_detect_irq); + carddetect = slot->card_detect(host->dev, host->slot_id); else { omap_hsmmc_protect_card(host); carddetect = -ENOSYS; @@ -1242,7 +1551,7 @@ static int omap_hsmmc_get_cd(struct mmc_host *mmc) if (!mmc_slot(host).card_detect) return -ENOSYS; - return mmc_slot(host).card_detect(mmc_slot(host).card_detect_irq); + return mmc_slot(host).card_detect(host->dev, host->slot_id); } static int omap_hsmmc_get_ro(struct mmc_host *mmc) @@ -1616,7 +1925,7 @@ static int __init omap_hsmmc_probe(struct platform_device *pdev) struct mmc_host *mmc; struct omap_hsmmc_host *host = NULL; struct resource *res; - int ret = 0, irq; + int ret, irq; if (pdata == NULL) { dev_err(&pdev->dev, "Platform Data is missing\n"); @@ -1638,10 +1947,14 @@ static int __init omap_hsmmc_probe(struct platform_device *pdev) if (res == NULL) return -EBUSY; + ret = omap_hsmmc_gpio_init(pdata); + if (ret) + goto err; + mmc = mmc_alloc_host(sizeof(struct omap_hsmmc_host), &pdev->dev); if (!mmc) { ret = -ENOMEM; - goto err; + goto err_alloc; } host = mmc_priv(mmc); @@ -1781,7 +2094,6 @@ static int __init omap_hsmmc_probe(struct platform_device *pdev) goto err_irq; } - /* initialize power supplies, gpios, etc */ if (pdata->init != NULL) { if (pdata->init(&pdev->dev) != 0) { dev_dbg(mmc_dev(host->mmc), @@ -1789,6 +2101,14 @@ static int __init omap_hsmmc_probe(struct platform_device *pdev) goto err_irq_cd_init; } } + + if (!mmc_slot(host).set_power) { + ret = omap_hsmmc_reg_get(host); + if (ret) + goto err_reg; + host->use_reg = 1; + } + mmc->ocr_avail = mmc_slot(host).ocr_mask; /* Request IRQ for card detect */ @@ -1823,19 +2143,22 @@ static int __init omap_hsmmc_probe(struct platform_device *pdev) ret = device_create_file(&mmc->class_dev, &dev_attr_cover_switch); if (ret < 0) - goto err_cover_switch; + goto err_slot_name; } omap_hsmmc_debugfs(mmc); return 0; -err_cover_switch: - device_remove_file(&mmc->class_dev, &dev_attr_cover_switch); err_slot_name: mmc_remove_host(mmc); -err_irq_cd: free_irq(mmc_slot(host).card_detect_irq, host); +err_irq_cd: + if (host->use_reg) + omap_hsmmc_reg_put(host); +err_reg: + if (host->pdata->cleanup) + host->pdata->cleanup(&pdev->dev); err_irq_cd_init: free_irq(host->irq, host); err_irq: @@ -1847,14 +2170,14 @@ err_irq: clk_disable(host->dbclk); clk_put(host->dbclk); } - err1: iounmap(host->base); + platform_set_drvdata(pdev, NULL); + mmc_free_host(mmc); +err_alloc: + omap_hsmmc_gpio_free(pdata); err: - dev_dbg(mmc_dev(host->mmc), "Probe Failed\n"); release_mem_region(res->start, res->end - res->start + 1); - if (host) - mmc_free_host(mmc); return ret; } @@ -1866,6 +2189,8 @@ static int omap_hsmmc_remove(struct platform_device *pdev) if (host) { mmc_host_enable(host->mmc); mmc_remove_host(host->mmc); + if (host->use_reg) + omap_hsmmc_reg_put(host); if (host->pdata->cleanup) host->pdata->cleanup(&pdev->dev); free_irq(host->irq, host); @@ -1884,6 +2209,7 @@ static int omap_hsmmc_remove(struct platform_device *pdev) mmc_free_host(host->mmc); iounmap(host->base); + omap_hsmmc_gpio_free(pdev->dev.platform_data); } res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |