diff options
Diffstat (limited to 'arch/arm/mach-omap2/hsmmc.c')
| -rw-r--r-- | arch/arm/mach-omap2/hsmmc.c | 120 |
1 files changed, 107 insertions, 13 deletions
diff --git a/arch/arm/mach-omap2/hsmmc.c b/arch/arm/mach-omap2/hsmmc.c index 9ad229594b46..1ef54b036103 100644 --- a/arch/arm/mach-omap2/hsmmc.c +++ b/arch/arm/mach-omap2/hsmmc.c @@ -24,6 +24,7 @@ static u16 control_pbias_offset; static u16 control_devconf1_offset; +static u16 control_mmc1; #define HSMMC_NAME_LEN 9 @@ -42,7 +43,7 @@ static int hsmmc_get_context_loss(struct device *dev) #define hsmmc_get_context_loss NULL #endif -static void hsmmc1_before_set_reg(struct device *dev, int slot, +static void omap_hsmmc1_before_set_reg(struct device *dev, int slot, int power_on, int vdd) { u32 reg, prog_io; @@ -95,7 +96,7 @@ static void hsmmc1_before_set_reg(struct device *dev, int slot, } } -static void hsmmc1_after_set_reg(struct device *dev, int slot, +static void omap_hsmmc1_after_set_reg(struct device *dev, int slot, int power_on, int vdd) { u32 reg; @@ -119,6 +120,60 @@ static void hsmmc1_after_set_reg(struct device *dev, int slot, } } +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. + * + * 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 ... + */ + reg = omap_ctrl_readl(control_pbias_offset); + reg &= ~(OMAP4_MMC1_PBIASLITE_PWRDNZ | OMAP4_MMC1_PWRDNZ | + OMAP4_USBC1_ICUSB_PWRDNZ); + omap_ctrl_writel(reg, control_pbias_offset); +} + +static void omap4_hsmmc1_after_set_reg(struct device *dev, int slot, + int power_on, int vdd) +{ + u32 reg; + + if (power_on) { + reg = omap_ctrl_readl(control_pbias_offset); + reg |= OMAP4_MMC1_PBIASLITE_PWRDNZ; + if ((1 << vdd) <= MMC_VDD_165_195) + reg &= ~OMAP4_MMC1_PBIASLITE_VMODE; + else + reg |= OMAP4_MMC1_PBIASLITE_VMODE; + reg |= (OMAP4_MMC1_PBIASLITE_PWRDNZ | OMAP4_MMC1_PWRDNZ | + OMAP4_USBC1_ICUSB_PWRDNZ); + omap_ctrl_writel(reg, control_pbias_offset); + /* 4 microsec delay for comparator to generate an error*/ + udelay(4); + reg = omap_ctrl_readl(control_pbias_offset); + if (reg & OMAP4_MMC1_PBIASLITE_VMODE_ERROR) { + pr_err("Pbias Voltage is not same as LDO\n"); + /* Caution : On VMODE_ERROR Power Down MMC IO */ + reg &= ~(OMAP4_MMC1_PWRDNZ | OMAP4_USBC1_ICUSB_PWRDNZ); + omap_ctrl_writel(reg, control_pbias_offset); + } + } else { + reg = omap_ctrl_readl(control_pbias_offset); + reg |= (OMAP4_MMC1_PBIASLITE_PWRDNZ | + OMAP4_MMC1_PBIASLITE_VMODE | OMAP4_MMC1_PWRDNZ | + OMAP4_USBC1_ICUSB_PWRDNZ); + omap_ctrl_writel(reg, control_pbias_offset); + } +} + static void hsmmc23_before_set_reg(struct device *dev, int slot, int power_on, int vdd) { @@ -139,6 +194,12 @@ static void hsmmc23_before_set_reg(struct device *dev, int slot, } } +static int nop_mmc_set_power(struct device *dev, int slot, int power_on, + int vdd) +{ + return 0; +} + static struct omap_mmc_platform_data *hsmmc_data[OMAP34XX_NR_MMC] __initdata; void __init omap2_hsmmc_init(struct omap2_hsmmc_info *controllers) @@ -146,13 +207,28 @@ void __init omap2_hsmmc_init(struct omap2_hsmmc_info *controllers) struct omap2_hsmmc_info *c; int nr_hsmmc = ARRAY_SIZE(hsmmc_data); int i; + u32 reg; - if (cpu_is_omap2430()) { - control_pbias_offset = OMAP243X_CONTROL_PBIAS_LITE; - control_devconf1_offset = OMAP243X_CONTROL_DEVCONF1; + 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 = OMAP343X_CONTROL_PBIAS_LITE; - control_devconf1_offset = OMAP343X_CONTROL_DEVCONF1; + control_pbias_offset = OMAP44XX_CONTROL_PBIAS_LITE; + control_mmc1 = OMAP44XX_CONTROL_MMC1; + reg = omap_ctrl_readl(control_mmc1); + reg |= (OMAP4_CONTROL_SDMMC1_PUSTRENGTHGRP0 | + OMAP4_CONTROL_SDMMC1_PUSTRENGTHGRP1); + reg &= ~(OMAP4_CONTROL_SDMMC1_PUSTRENGTHGRP2 | + OMAP4_CONTROL_SDMMC1_PUSTRENGTHGRP3); + reg |= (OMAP4_CONTROL_SDMMC1_DR0_SPEEDCTRL | + OMAP4_CONTROL_SDMMC1_DR1_SPEEDCTRL | + OMAP4_CONTROL_SDMMC1_DR2_SPEEDCTRL); + omap_ctrl_writel(reg, control_mmc1); } for (c = controllers; c->mmc; c++) { @@ -216,11 +292,27 @@ void __init omap2_hsmmc_init(struct omap2_hsmmc_info *controllers) */ mmc->slots[0].ocr_mask = c->ocr_mask; + if (cpu_is_omap3517() || cpu_is_omap3505()) + mmc->slots[0].set_power = nop_mmc_set_power; + else + mmc->slots[0].features |= HSMMC_HAS_PBIAS; + switch (c->mmc) { case 1: - /* on-chip level shifting via PBIAS0/PBIAS1 */ - mmc->slots[0].before_set_reg = hsmmc1_before_set_reg; - mmc->slots[0].after_set_reg = hsmmc1_after_set_reg; + 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; + } + } /* Omap3630 HSMMC1 supports only 4-bit */ if (cpu_is_omap3630() && c->wires > 4) { @@ -235,9 +327,11 @@ void __init omap2_hsmmc_init(struct omap2_hsmmc_info *controllers) c->wires = 4; /* FALLTHROUGH */ case 3: - /* off-chip level shifting, or none */ - mmc->slots[0].before_set_reg = hsmmc23_before_set_reg; - mmc->slots[0].after_set_reg = NULL; + if (mmc->slots[0].features & HSMMC_HAS_PBIAS) { + /* off-chip level shifting, or none */ + 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); |