From ca5879d3ffebd967e94b2dc3b1a3dc089709206f Mon Sep 17 00:00:00 2001 From: Pavan Kunapuli Date: Wed, 18 Apr 2012 18:48:02 +0530 Subject: [PATCH] mmc: tegra: support SDHCI SPEC 300 Tegra3 SDHOST controller doesn't advertise v3.00 support by default. This support has to be enabled by configuring a vendor register in the tegra3 sd host address space. Signed-off-by: Pavan Kunapuli Acked-by: Stephen Warren Signed-off-by: Chris Ball --- drivers/mmc/host/sdhci-tegra.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/drivers/mmc/host/sdhci-tegra.c b/drivers/mmc/host/sdhci-tegra.c index 53b26502f6e..cff0c522b4a 100644 --- a/drivers/mmc/host/sdhci-tegra.c +++ b/drivers/mmc/host/sdhci-tegra.c @@ -32,8 +32,13 @@ #include "sdhci-pltfm.h" +/* Tegra SDHOST controller vendor register definitions */ +#define SDHCI_TEGRA_VENDOR_MISC_CTRL 0x120 +#define SDHCI_MISC_CTRL_ENABLE_SDHCI_SPEC_300 0x20 + #define NVQUIRK_FORCE_SDHCI_SPEC_200 BIT(0) #define NVQUIRK_ENABLE_BLOCK_GAP_DET BIT(1) +#define NVQUIRK_ENABLE_SDHCI_SPEC_300 BIT(2) struct sdhci_tegra_soc_data { struct sdhci_pltfm_data *pdata; @@ -120,6 +125,25 @@ static irqreturn_t carddetect_irq(int irq, void *data) return IRQ_HANDLED; }; +static void tegra_sdhci_reset_exit(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; + + if (!(mask & SDHCI_RESET_ALL)) + return; + + /* 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); + misc_ctrl |= SDHCI_MISC_CTRL_ENABLE_SDHCI_SPEC_300; + sdhci_writeb(host, misc_ctrl, SDHCI_TEGRA_VENDOR_MISC_CTRL); + } +} + static int tegra_sdhci_8bit(struct sdhci_host *host, int bus_width) { struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); @@ -148,6 +172,7 @@ static struct sdhci_ops tegra_sdhci_ops = { .read_w = tegra_sdhci_readw, .write_l = tegra_sdhci_writel, .platform_8bit_width = tegra_sdhci_8bit, + .platform_reset_exit = tegra_sdhci_reset_exit, }; #ifdef CONFIG_ARCH_TEGRA_2x_SOC @@ -178,6 +203,7 @@ static 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, }; #endif -- 2.46.0