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mmc: tegra: disable UHS modes

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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>
This commit is contained in:
Andrew Bresticker 2014-05-22 08:55:35 -07:00 committed by Chris Ball
parent c5ee249069
commit 3145351a6f
1 changed files with 23 additions and 7 deletions
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30
drivers/mmc/host/sdhci-tegra.c
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@ -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[] = {