diff options
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/host/sdhci-tegra.c | 47 |
1 files changed, 44 insertions, 3 deletions
diff --git a/drivers/mmc/host/sdhci-tegra.c b/drivers/mmc/host/sdhci-tegra.c index 79c2a2b7428a..f8c4762bb48d 100644 --- a/drivers/mmc/host/sdhci-tegra.c +++ b/drivers/mmc/host/sdhci-tegra.c @@ -12,6 +12,7 @@ * */ +#include <linux/delay.h> #include <linux/err.h> #include <linux/module.h> #include <linux/init.h> @@ -42,12 +43,17 @@ #define SDHCI_MISC_CTRL_ENABLE_SDHCI_SPEC_300 0x20 #define SDHCI_MISC_CTRL_ENABLE_DDR50 0x200 +#define SDHCI_TEGRA_AUTO_CAL_CONFIG 0x1e4 +#define SDHCI_AUTO_CAL_START BIT(31) +#define SDHCI_AUTO_CAL_ENABLE BIT(29) + #define NVQUIRK_FORCE_SDHCI_SPEC_200 BIT(0) #define NVQUIRK_ENABLE_BLOCK_GAP_DET BIT(1) #define NVQUIRK_ENABLE_SDHCI_SPEC_300 BIT(2) #define NVQUIRK_ENABLE_SDR50 BIT(3) #define NVQUIRK_ENABLE_SDR104 BIT(4) #define NVQUIRK_ENABLE_DDR50 BIT(5) +#define NVQUIRK_HAS_PADCALIB BIT(6) struct sdhci_tegra_soc_data { const struct sdhci_pltfm_data *pdata; @@ -58,6 +64,7 @@ struct sdhci_tegra { const struct sdhci_tegra_soc_data *soc_data; struct gpio_desc *power_gpio; bool ddr_signaling; + bool pad_calib_required; }; static u16 tegra_sdhci_readw(struct sdhci_host *host, int reg) @@ -165,6 +172,9 @@ static void tegra_sdhci_reset(struct sdhci_host *host, u8 mask) clk_ctrl |= SDHCI_CLOCK_CTRL_SDR50_TUNING_OVERRIDE; sdhci_writel(host, clk_ctrl, SDHCI_TEGRA_VENDOR_CLOCK_CTRL); + if (soc_data->nvquirks & NVQUIRK_HAS_PADCALIB) + tegra_host->pad_calib_required = true; + tegra_host->ddr_signaling = false; } @@ -187,6 +197,17 @@ static void tegra_sdhci_set_bus_width(struct sdhci_host *host, int bus_width) sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL); } +static void tegra_sdhci_pad_autocalib(struct sdhci_host *host) +{ + u32 val; + + mdelay(1); + + val = sdhci_readl(host, SDHCI_TEGRA_AUTO_CAL_CONFIG); + val |= SDHCI_AUTO_CAL_ENABLE | SDHCI_AUTO_CAL_START; + sdhci_writel(host,val, SDHCI_TEGRA_AUTO_CAL_CONFIG); +} + static void tegra_sdhci_set_clock(struct sdhci_host *host, unsigned int clock) { struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); @@ -200,7 +221,12 @@ static void tegra_sdhci_set_clock(struct sdhci_host *host, unsigned int clock) clk_set_rate(pltfm_host->clk, host_clk); host->max_clk = clk_get_rate(pltfm_host->clk); - return sdhci_set_clock(host, clock); + sdhci_set_clock(host, clock); + + if (tegra_host->pad_calib_required) { + tegra_sdhci_pad_autocalib(host); + tegra_host->pad_calib_required = false; + } } static void tegra_sdhci_set_uhs_signaling(struct sdhci_host *host, @@ -270,6 +296,16 @@ static int tegra_sdhci_execute_tuning(struct sdhci_host *host, u32 opcode) return mmc_send_tuning(host->mmc, opcode, NULL); } +static void tegra_sdhci_voltage_switch(struct sdhci_host *host) +{ + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + struct sdhci_tegra *tegra_host = sdhci_pltfm_priv(pltfm_host); + const struct sdhci_tegra_soc_data *soc_data = tegra_host->soc_data; + + if (soc_data->nvquirks & NVQUIRK_HAS_PADCALIB) + tegra_host->pad_calib_required = true; +} + static const struct sdhci_ops tegra_sdhci_ops = { .get_ro = tegra_sdhci_get_ro, .read_w = tegra_sdhci_readw, @@ -279,6 +315,7 @@ static const struct sdhci_ops tegra_sdhci_ops = { .reset = tegra_sdhci_reset, .platform_execute_tuning = tegra_sdhci_execute_tuning, .set_uhs_signaling = tegra_sdhci_set_uhs_signaling, + .voltage_switch = tegra_sdhci_voltage_switch, .get_max_clock = tegra_sdhci_get_max_clock, }; @@ -312,7 +349,8 @@ static const struct sdhci_tegra_soc_data soc_data_tegra30 = { .pdata = &sdhci_tegra30_pdata, .nvquirks = NVQUIRK_ENABLE_SDHCI_SPEC_300 | NVQUIRK_ENABLE_SDR50 | - NVQUIRK_ENABLE_SDR104, + NVQUIRK_ENABLE_SDR104 | + NVQUIRK_HAS_PADCALIB, }; static const struct sdhci_ops tegra114_sdhci_ops = { @@ -325,6 +363,7 @@ static const struct sdhci_ops tegra114_sdhci_ops = { .reset = tegra_sdhci_reset, .platform_execute_tuning = tegra_sdhci_execute_tuning, .set_uhs_signaling = tegra_sdhci_set_uhs_signaling, + .voltage_switch = tegra_sdhci_voltage_switch, .get_max_clock = tegra_sdhci_get_max_clock, }; @@ -347,7 +386,8 @@ static const struct sdhci_tegra_soc_data soc_data_tegra124 = { .pdata = &sdhci_tegra114_pdata, .nvquirks = NVQUIRK_ENABLE_SDR50 | NVQUIRK_ENABLE_DDR50 | - NVQUIRK_ENABLE_SDR104, + NVQUIRK_ENABLE_SDR104 | + NVQUIRK_HAS_PADCALIB, }; static const struct sdhci_pltfm_data sdhci_tegra210_pdata = { @@ -397,6 +437,7 @@ static int sdhci_tegra_probe(struct platform_device *pdev) tegra_host = sdhci_pltfm_priv(pltfm_host); tegra_host->ddr_signaling = false; + tegra_host->pad_calib_required = false; tegra_host->soc_data = soc_data; rc = mmc_of_parse(host->mmc); |