X-Git-Url: http://www.pilppa.org/gitweb/gitweb.cgi?p=linux-2.6-omap-h63xx.git;a=blobdiff_plain;f=arch%2Farm%2Fmach-omap2%2Fmmc-twl4030.c;fp=arch%2Farm%2Fmach-omap2%2Fmmc-twl4030.c;h=46d6e9bcadfa5c495a9c9ab026b0a260bf922cb1;hp=dc40b3e72206080164b1c1f5b17def1f4d211688;hb=0d5f2216edfeb9904e0d6512f803b0f93871baaf;hpb=14fc69723d3442ef46f8f82b3f481e82f06a346d diff --git a/arch/arm/mach-omap2/mmc-twl4030.c b/arch/arm/mach-omap2/mmc-twl4030.c index dc40b3e7220..46d6e9bcadf 100644 --- a/arch/arm/mach-omap2/mmc-twl4030.c +++ b/arch/arm/mach-omap2/mmc-twl4030.c @@ -16,8 +16,8 @@ #include #include #include -#include -#include +#include +#include #include #include @@ -26,31 +26,9 @@ #include "mmc-twl4030.h" -#if defined(CONFIG_TWL4030_CORE) && \ - (defined(CONFIG_MMC_OMAP_HS) || defined(CONFIG_MMC_OMAP_HS_MODULE)) -#define LDO_CLR 0x00 -#define VSEL_S2_CLR 0x40 - -#define VMMC1_DEV_GRP 0x27 -#define VMMC1_CLR 0x00 -#define VMMC1_315V 0x03 -#define VMMC1_300V 0x02 -#define VMMC1_285V 0x01 -#define VMMC1_185V 0x00 -#define VMMC1_DEDICATED 0x2A - -#define VMMC2_DEV_GRP 0x2B -#define VMMC2_CLR 0x40 -#define VMMC2_315V 0x0c -#define VMMC2_300V 0x0b -#define VMMC2_285V 0x0a -#define VMMC2_280V 0x09 -#define VMMC2_260V 0x08 -#define VMMC2_185V 0x06 -#define VMMC2_DEDICATED 0x2E - -#define VMMC_DEV_GRP_P1 0x20 +#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; @@ -59,19 +37,16 @@ static u16 control_devconf1_offset; static struct twl_mmc_controller { struct omap_mmc_platform_data *mmc; - u8 twl_vmmc_dev_grp; - u8 twl_mmc_dedicated; - char name[HSMMC_NAME_LEN + 1]; -} hsmmc[OMAP34XX_NR_MMC] = { - { - .twl_vmmc_dev_grp = VMMC1_DEV_GRP, - .twl_mmc_dedicated = VMMC1_DEDICATED, - }, - { - .twl_vmmc_dev_grp = VMMC2_DEV_GRP, - .twl_mmc_dedicated = VMMC2_DEDICATED, - }, -}; + /* 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) { @@ -117,16 +92,60 @@ static int twl_mmc_late_init(struct device *dev) int ret = 0; int i; - 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; + /* 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); + 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 disabling 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; } } @@ -173,96 +192,6 @@ static int twl_mmc_resume(struct device *dev, int slot) #define twl_mmc_resume NULL #endif -/* - * Sets the MMC voltage in twl4030 - */ - -#define MMC1_OCR (MMC_VDD_165_195 \ - |MMC_VDD_28_29|MMC_VDD_29_30|MMC_VDD_30_31|MMC_VDD_31_32) -#define MMC2_OCR (MMC_VDD_165_195 \ - |MMC_VDD_25_26|MMC_VDD_26_27|MMC_VDD_27_28 \ - |MMC_VDD_28_29|MMC_VDD_29_30|MMC_VDD_30_31|MMC_VDD_31_32) - -static int twl_mmc_set_voltage(struct twl_mmc_controller *c, int vdd) -{ - int ret; - u8 vmmc = 0, dev_grp_val; - - if (!vdd) - goto doit; - - if (c->twl_vmmc_dev_grp == VMMC1_DEV_GRP) { - /* VMMC1: max 220 mA. And for 8-bit mode, - * VSIM: max 50 mA - */ - switch (1 << vdd) { - case MMC_VDD_165_195: - vmmc = VMMC1_185V; - /* and VSIM_180V */ - break; - case MMC_VDD_28_29: - vmmc = VMMC1_285V; - /* and VSIM_280V */ - break; - case MMC_VDD_29_30: - case MMC_VDD_30_31: - vmmc = VMMC1_300V; - /* and VSIM_300V */ - break; - case MMC_VDD_31_32: - vmmc = VMMC1_315V; - /* error if VSIM needed */ - break; - default: - return -EINVAL; - } - } else if (c->twl_vmmc_dev_grp == VMMC2_DEV_GRP) { - /* VMMC2: max 100 mA */ - switch (1 << vdd) { - case MMC_VDD_165_195: - vmmc = VMMC2_185V; - break; - case MMC_VDD_25_26: - case MMC_VDD_26_27: - vmmc = VMMC2_260V; - break; - case MMC_VDD_27_28: - vmmc = VMMC2_280V; - break; - case MMC_VDD_28_29: - vmmc = VMMC2_285V; - break; - case MMC_VDD_29_30: - case MMC_VDD_30_31: - vmmc = VMMC2_300V; - break; - case MMC_VDD_31_32: - vmmc = VMMC2_315V; - break; - default: - return -EINVAL; - } - } else { - return -EINVAL; - } - -doit: - if (vdd) - dev_grp_val = VMMC_DEV_GRP_P1; /* Power up */ - else - dev_grp_val = LDO_CLR; /* Power down */ - - ret = twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, - dev_grp_val, c->twl_vmmc_dev_grp); - if (ret || !vdd) - return ret; - - ret = twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, - vmmc, c->twl_mmc_dedicated); - - return ret; -} - static int twl_mmc1_set_power(struct device *dev, int slot, int power_on, int vdd) { @@ -273,11 +202,13 @@ static int twl_mmc1_set_power(struct device *dev, int slot, int power_on, /* * Assume we power both OMAP VMMC1 (for CMD, CLK, DAT0..3) and the - * card using the same TWL VMMC1 supply (hsmmc[0]); OMAP has both + * 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()) { @@ -300,7 +231,7 @@ static int twl_mmc1_set_power(struct device *dev, int slot, int power_on, reg &= ~OMAP2_PBIASLITEPWRDNZ0; omap_ctrl_writel(reg, control_pbias_offset); - ret = twl_mmc_set_voltage(c, vdd); + ret = mmc_regulator_set_ocr(c->vcc, vdd); /* 100ms delay required for PBIAS configuration */ msleep(100); @@ -316,7 +247,7 @@ static int twl_mmc1_set_power(struct device *dev, int slot, int power_on, reg &= ~OMAP2_PBIASLITEPWRDNZ0; omap_ctrl_writel(reg, control_pbias_offset); - ret = twl_mmc_set_voltage(c, 0); + ret = mmc_regulator_set_ocr(c->vcc, 0); /* 100ms delay required for PBIAS configuration */ msleep(100); @@ -329,19 +260,33 @@ static int twl_mmc1_set_power(struct device *dev, int slot, int power_on, return ret; } -static int twl_mmc2_set_power(struct device *dev, int slot, int power_on, int vdd) +static int twl_mmc23_set_power(struct device *dev, int slot, int power_on, int vdd) { - int ret; + int ret = 0; struct twl_mmc_controller *c = &hsmmc[1]; struct omap_mmc_platform_data *mmc = dev->platform_data; + /* If we don't see a Vcc regulator, assume it's a fixed + * voltage always-on regulator. + */ + if (!c->vcc) + return 0; + /* - * Assume TWL VMMC2 (hsmmc[1]) is used only to power the card ... OMAP + * 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; @@ -349,24 +294,23 @@ static int twl_mmc2_set_power(struct device *dev, int slot, int power_on, int vd reg |= OMAP2_MMCSDIO2ADPCLKISEL; omap_ctrl_writel(reg, control_devconf1_offset); } - ret = twl_mmc_set_voltage(c, vdd); + 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 { - ret = twl_mmc_set_voltage(c, 0); + 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_mmc3_set_power(struct device *dev, int slot, int power_on, - int vdd) -{ - /* - * Assume MMC3 has self-powered device connected, for example on-board - * chip with external power source. - */ - return 0; -} - static struct omap_mmc_platform_data *hsmmc_data[OMAP34XX_NR_MMC] __initdata; void __init twl4030_mmc_init(struct twl4030_hsmmc_info *controllers) @@ -405,17 +349,16 @@ void __init twl4030_mmc_init(struct twl4030_hsmmc_info *controllers) 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); + sprintf(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 normally switch VMMCx ... */ + /* note: twl4030 card detect GPIOs can disable VMMCx ... */ if (gpio_is_valid(c->gpio_cd)) { - mmc->init = twl_mmc_late_init; mmc->cleanup = twl_mmc_cleanup; mmc->suspend = twl_mmc_suspend; mmc->resume = twl_mmc_resume; @@ -439,26 +382,28 @@ void __init twl4030_mmc_init(struct twl4030_hsmmc_info *controllers) } else mmc->slots[0].gpio_wp = -EINVAL; - /* NOTE: we assume OMAP's MMC1 and MMC2 use - * the TWL4030's VMMC1 and VMMC2, respectively; - * and that MMC3 device has it's own power source. + /* 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].ocr_mask = MMC1_OCR; break; case 2: - mmc->slots[0].set_power = twl_mmc2_set_power; - if (c->transceiver) - mmc->slots[0].ocr_mask = MMC2_OCR; - else - mmc->slots[0].ocr_mask = MMC_VDD_165_195; - break; + if (c->ext_clock) + c->transceiver = 1; + if (c->transceiver && c->wires > 4) + c->wires = 4; + /* FALLTHROUGH */ case 3: - mmc->slots[0].set_power = twl_mmc3_set_power; - mmc->slots[0].ocr_mask = MMC_VDD_165_195; + /* off-chip level shifting, or none */ + mmc->slots[0].set_power = twl_mmc23_set_power; break; default: pr_err("MMC%d configuration not supported!\n", c->mmc);