diff options
| author | Andrew Bresticker <abrestic@chromium.org> | 2014-05-22 15:55:35 (GMT) |
|---|---|---|
| committer | Chris Ball <chris@printf.net> | 2014-05-23 12:48:55 (GMT) |
| commit | 3145351a6f4026fa9e9f8c7a0ba85a877377e0e3 (patch) | |
| tree | eec15cbe8690f8373199b2453239e3b7a40e5ba7 /drivers/mmc/host | |
| parent | c5ee249069367fa0529de007f7119a157ce4a4ad (diff) | |
| download | linux-3145351a6f4026fa9e9f8c7a0ba85a877377e0e3.tar.xz | |
mmc: tegra: disable UHS modes
Program TEGRA_SDHCI_VENDOR_MISC_CTRL so that UHS modes aren't advertised
in SDHCI_CAPABILITIES_1. While the Tegra SDHCI controller does support
these modes, they require Tegra-specific tuning and calibration routines
which the driver does not support yet.
Signed-off-by: Andrew Bresticker <abrestic@chromium.org>
Tested-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Chris Ball <chris@printf.net>
Diffstat (limited to 'drivers/mmc/host')
| -rw-r--r-- | drivers/mmc/host/sdhci-tegra.c | 30 |
1 files changed, 23 insertions, 7 deletions
diff --git a/drivers/mmc/host/sdhci-tegra.c b/drivers/mmc/host/sdhci-tegra.c index 9852476..4375cd4 100644 --- a/drivers/mmc/host/sdhci-tegra.c +++ b/drivers/mmc/host/sdhci-tegra.c @@ -32,11 +32,17 @@ /* Tegra SDHOST controller vendor register definitions */ #define SDHCI_TEGRA_VENDOR_MISC_CTRL 0x120 +#define SDHCI_MISC_CTRL_ENABLE_SDR104 0x8 +#define SDHCI_MISC_CTRL_ENABLE_SDR50 0x10 #define SDHCI_MISC_CTRL_ENABLE_SDHCI_SPEC_300 0x20 +#define SDHCI_MISC_CTRL_ENABLE_DDR50 0x200 #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_DISABLE_SDR50 BIT(3) +#define NVQUIRK_DISABLE_SDR104 BIT(4) +#define NVQUIRK_DISABLE_DDR50 BIT(5) struct sdhci_tegra_soc_data { const struct sdhci_pltfm_data *pdata; @@ -100,20 +106,25 @@ static void tegra_sdhci_reset(struct sdhci_host *host, u8 mask) struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); struct sdhci_tegra *tegra_host = pltfm_host->priv; const struct sdhci_tegra_soc_data *soc_data = tegra_host->soc_data; + u32 misc_ctrl; sdhci_reset(host, mask); if (!(mask & SDHCI_RESET_ALL)) return; + misc_ctrl = sdhci_readw(host, SDHCI_TEGRA_VENDOR_MISC_CTRL); /* Erratum: Enable SDHCI spec v3.00 support */ - if (soc_data->nvquirks & NVQUIRK_ENABLE_SDHCI_SPEC_300) { - u32 misc_ctrl; - - misc_ctrl = sdhci_readb(host, SDHCI_TEGRA_VENDOR_MISC_CTRL); + if (soc_data->nvquirks & NVQUIRK_ENABLE_SDHCI_SPEC_300) misc_ctrl |= SDHCI_MISC_CTRL_ENABLE_SDHCI_SPEC_300; - sdhci_writeb(host, misc_ctrl, SDHCI_TEGRA_VENDOR_MISC_CTRL); - } + /* Don't advertise UHS modes which aren't supported yet */ + if (soc_data->nvquirks & NVQUIRK_DISABLE_SDR50) + misc_ctrl &= ~SDHCI_MISC_CTRL_ENABLE_SDR50; + if (soc_data->nvquirks & NVQUIRK_DISABLE_DDR50) + misc_ctrl &= ~SDHCI_MISC_CTRL_ENABLE_DDR50; + if (soc_data->nvquirks & NVQUIRK_DISABLE_SDR104) + misc_ctrl &= ~SDHCI_MISC_CTRL_ENABLE_SDR104; + sdhci_writew(host, misc_ctrl, SDHCI_TEGRA_VENDOR_MISC_CTRL); } static void tegra_sdhci_set_bus_width(struct sdhci_host *host, int bus_width) @@ -170,7 +181,9 @@ static const struct sdhci_pltfm_data sdhci_tegra30_pdata = { static struct sdhci_tegra_soc_data soc_data_tegra30 = { .pdata = &sdhci_tegra30_pdata, - .nvquirks = NVQUIRK_ENABLE_SDHCI_SPEC_300, + .nvquirks = NVQUIRK_ENABLE_SDHCI_SPEC_300 | + NVQUIRK_DISABLE_SDR50 | + NVQUIRK_DISABLE_SDR104, }; static const struct sdhci_pltfm_data sdhci_tegra114_pdata = { @@ -184,6 +197,9 @@ static const struct sdhci_pltfm_data sdhci_tegra114_pdata = { static struct sdhci_tegra_soc_data soc_data_tegra114 = { .pdata = &sdhci_tegra114_pdata, + .nvquirks = NVQUIRK_DISABLE_SDR50 | + NVQUIRK_DISABLE_DDR50 | + NVQUIRK_DISABLE_SDR104, }; static const struct of_device_id sdhci_tegra_dt_match[] = { |