From: Kishon Vijay Abraham I kishon@ti.com
"ti,dual-volt" is used in linux kernel to set the voltage capabilities. For host controller dt nodes that doesn't have "ti,dual-volt", it's assumed 1.8v is the io voltage. This is not always true (like in the case of beagle-x15 where the io lines are connected to 3.3v). Hence if "no-1-8-v" property is set, io voltage will be set to 3v.
Signed-off-by: Kishon Vijay Abraham I kishon@ti.com Signed-off-by: Jean-Jacques Hiblot jjhiblot@ti.com ---
arch/arm/include/asm/omap_mmc.h | 12 ++++++-- drivers/mmc/omap_hsmmc.c | 67 +++++++++++++++++++++++++++++++++++++++++ 2 files changed, 77 insertions(+), 2 deletions(-)
diff --git a/arch/arm/include/asm/omap_mmc.h b/arch/arm/include/asm/omap_mmc.h index 102aec2..c4d326d 100644 --- a/arch/arm/include/asm/omap_mmc.h +++ b/arch/arm/include/asm/omap_mmc.h @@ -65,6 +65,7 @@ struct omap_hsmmc_plat { struct hsmmc *base_addr; struct mmc mmc; bool cd_inverted; + u32 controller_flags; };
/* @@ -124,8 +125,10 @@ struct omap_hsmmc_plat { #define DTW_8_BITMODE (0x1 << 5) /* CON[DW8]*/ #define SDBP_PWROFF (0x0 << 8) #define SDBP_PWRON (0x1 << 8) +#define SDVS_MASK (0x7 << 9) #define SDVS_1V8 (0x5 << 9) #define SDVS_3V0 (0x6 << 9) +#define SDVS_3V3 (0x7 << 9) #define DMA_SELECT (0x2 << 3) #define ICE_MASK (0x1 << 0) #define ICE_STOP (0x0 << 0) @@ -159,8 +162,13 @@ struct omap_hsmmc_plat { #define IE_CERR (0x01 << 28) #define IE_BADA (0x01 << 29)
-#define VS30_3V0SUP (1 << 25) -#define VS18_1V8SUP (1 << 26) +#define VS33_3V3SUP BIT(24) +#define VS30_3V0SUP BIT(25) +#define VS18_1V8SUP BIT(26) + +#define IOV_3V3 3300000 +#define IOV_3V0 3000000 +#define IOV_1V8 1800000
/* Driver definitions */ #define MMCSD_SECTOR_SIZE 512 diff --git a/drivers/mmc/omap_hsmmc.c b/drivers/mmc/omap_hsmmc.c index f02a7a5e..a6a0df6 100644 --- a/drivers/mmc/omap_hsmmc.c +++ b/drivers/mmc/omap_hsmmc.c @@ -74,6 +74,9 @@ struct omap_hsmmc_data { int wp_gpio; #endif #endif +#if CONFIG_IS_ENABLED(DM_MMC) + uint iov; +#endif u8 controller_flags; #ifndef CONFIG_OMAP34XX struct omap_hsmmc_adma_desc *adma_desc_table; @@ -111,6 +114,8 @@ struct omap_hsmmc_adma_desc { * that the bandwidth is always above 3MB/s). */ #define DMA_TIMEOUT_PER_MB 333 +#define OMAP_HSMMC_SUPPORTS_DUAL_VOLT BIT(0) +#define OMAP_HSMMC_NO_1_8_V BIT(1) #define OMAP_HSMMC_USE_ADMA BIT(2)
static int mmc_read_data(struct hsmmc *mmc_base, char *buf, unsigned int size); @@ -252,6 +257,58 @@ void mmc_init_stream(struct hsmmc *mmc_base) writel(readl(&mmc_base->con) & ~INIT_INITSTREAM, &mmc_base->con); }
+#if CONFIG_IS_ENABLED(DM_MMC) +static void omap_hsmmc_conf_bus_power(struct mmc *mmc) +{ + struct hsmmc *mmc_base; + struct omap_hsmmc_data *priv = omap_hsmmc_get_data(mmc); + u32 val; + + mmc_base = priv->base_addr; + + val = readl(&mmc_base->hctl) & ~SDVS_MASK; + + switch (priv->iov) { + case IOV_3V3: + val |= SDVS_3V3; + break; + case IOV_3V0: + val |= SDVS_3V0; + break; + case IOV_1V8: + val |= SDVS_1V8; + break; + } + + writel(val, &mmc_base->hctl); +} + +static void omap_hsmmc_set_capabilities(struct mmc *mmc) +{ + struct hsmmc *mmc_base; + struct omap_hsmmc_data *priv = omap_hsmmc_get_data(mmc); + u32 val; + + mmc_base = priv->base_addr; + val = readl(&mmc_base->capa); + + if (priv->controller_flags & OMAP_HSMMC_SUPPORTS_DUAL_VOLT) { + val |= (VS30_3V0SUP | VS18_1V8SUP); + priv->iov = IOV_3V0; + } else if (priv->controller_flags & OMAP_HSMMC_NO_1_8_V) { + val |= VS30_3V0SUP; + val &= ~VS18_1V8SUP; + priv->iov = IOV_3V0; + } else { + val |= VS18_1V8SUP; + val &= ~VS30_3V0SUP; + priv->iov = IOV_1V8; + } + + writel(val, &mmc_base->capa); +} +#endif + static int omap_hsmmc_init_setup(struct mmc *mmc) { struct omap_hsmmc_data *priv = omap_hsmmc_get_data(mmc); @@ -286,9 +343,15 @@ static int omap_hsmmc_init_setup(struct mmc *mmc) if (reg_val & MADMA_EN) priv->controller_flags |= OMAP_HSMMC_USE_ADMA; #endif + +#if CONFIG_IS_ENABLED(DM_MMC) + omap_hsmmc_set_capabilities(mmc); + omap_hsmmc_conf_bus_power(mmc); +#else writel(DTW_1_BITMODE | SDBP_PWROFF | SDVS_3V0, &mmc_base->hctl); writel(readl(&mmc_base->capa) | VS30_3V0SUP | VS18_1V8SUP, &mmc_base->capa); +#endif
reg_val = readl(&mmc_base->con) & RESERVED_MASK;
@@ -1069,6 +1132,10 @@ static int omap_hsmmc_ofdata_to_platdata(struct udevice *dev) cfg->f_max = fdtdec_get_int(fdt, node, "max-frequency", 52000000); cfg->voltages = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195; cfg->b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT; + if (fdtdec_get_bool(fdt, node, "ti,dual-volt")) + plat->controller_flags |= OMAP_HSMMC_SUPPORTS_DUAL_VOLT; + if (fdtdec_get_bool(fdt, node, "no-1-8-v")) + plat->controller_flags |= OMAP_HSMMC_NO_1_8_V;
#ifdef OMAP_HSMMC_USE_GPIO plat->cd_inverted = fdtdec_get_bool(fdt, node, "cd-inverted");