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path: root/drivers/mmc/host/sdhci-esdhc-imx.c
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Diffstat (limited to 'drivers/mmc/host/sdhci-esdhc-imx.c')
-rw-r--r--drivers/mmc/host/sdhci-esdhc-imx.c80
1 files changed, 73 insertions, 7 deletions
diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c
index 4dc0028086a3..ae57769ba50d 100644
--- a/drivers/mmc/host/sdhci-esdhc-imx.c
+++ b/drivers/mmc/host/sdhci-esdhc-imx.c
@@ -32,6 +32,15 @@
/* VENDOR SPEC register */
#define SDHCI_VENDOR_SPEC 0xC0
#define SDHCI_VENDOR_SPEC_SDIO_QUIRK 0x00000002
+#define SDHCI_MIX_CTRL 0x48
+
+/*
+ * There is an INT DMA ERR mis-match between eSDHC and STD SDHC SPEC:
+ * Bit25 is used in STD SPEC, and is reserved in fsl eSDHC design,
+ * but bit28 is used as the INT DMA ERR in fsl eSDHC design.
+ * Define this macro DMA error INT for fsl eSDHC
+ */
+#define SDHCI_INT_VENDOR_SPEC_DMA_ERR 0x10000000
/*
* The CMDTYPE of the CMD register (offset 0xE) should be set to
@@ -51,6 +60,7 @@ enum imx_esdhc_type {
IMX35_ESDHC,
IMX51_ESDHC,
IMX53_ESDHC,
+ IMX6Q_USDHC,
};
struct pltfm_imx_data {
@@ -74,6 +84,9 @@ static struct platform_device_id imx_esdhc_devtype[] = {
.name = "sdhci-esdhc-imx53",
.driver_data = IMX53_ESDHC,
}, {
+ .name = "sdhci-usdhc-imx6q",
+ .driver_data = IMX6Q_USDHC,
+ }, {
/* sentinel */
}
};
@@ -84,6 +97,7 @@ static const struct of_device_id imx_esdhc_dt_ids[] = {
{ .compatible = "fsl,imx35-esdhc", .data = &imx_esdhc_devtype[IMX35_ESDHC], },
{ .compatible = "fsl,imx51-esdhc", .data = &imx_esdhc_devtype[IMX51_ESDHC], },
{ .compatible = "fsl,imx53-esdhc", .data = &imx_esdhc_devtype[IMX53_ESDHC], },
+ { .compatible = "fsl,imx6q-usdhc", .data = &imx_esdhc_devtype[IMX6Q_USDHC], },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, imx_esdhc_dt_ids);
@@ -108,6 +122,11 @@ static inline int is_imx53_esdhc(struct pltfm_imx_data *data)
return data->devtype == IMX53_ESDHC;
}
+static inline int is_imx6q_usdhc(struct pltfm_imx_data *data)
+{
+ return data->devtype == IMX6Q_USDHC;
+}
+
static inline void esdhc_clrset_le(struct sdhci_host *host, u32 mask, u32 val, int reg)
{
void __iomem *base = host->ioaddr + (reg & ~0x3);
@@ -135,6 +154,27 @@ static u32 esdhc_readl_le(struct sdhci_host *host, int reg)
val |= SDHCI_CARD_PRESENT;
}
+ if (unlikely(reg == SDHCI_CAPABILITIES)) {
+ /* In FSL esdhc IC module, only bit20 is used to indicate the
+ * ADMA2 capability of esdhc, but this bit is messed up on
+ * some SOCs (e.g. on MX25, MX35 this bit is set, but they
+ * don't actually support ADMA2). So set the BROKEN_ADMA
+ * uirk on MX25/35 platforms.
+ */
+
+ if (val & SDHCI_CAN_DO_ADMA1) {
+ val &= ~SDHCI_CAN_DO_ADMA1;
+ val |= SDHCI_CAN_DO_ADMA2;
+ }
+ }
+
+ if (unlikely(reg == SDHCI_INT_STATUS)) {
+ if (val & SDHCI_INT_VENDOR_SPEC_DMA_ERR) {
+ val &= ~SDHCI_INT_VENDOR_SPEC_DMA_ERR;
+ val |= SDHCI_INT_ADMA_ERROR;
+ }
+ }
+
return val;
}
@@ -179,13 +219,28 @@ static void esdhc_writel_le(struct sdhci_host *host, u32 val, int reg)
writel(v, host->ioaddr + SDHCI_VENDOR_SPEC);
}
+ if (unlikely(reg == SDHCI_INT_ENABLE || reg == SDHCI_SIGNAL_ENABLE)) {
+ if (val & SDHCI_INT_ADMA_ERROR) {
+ val &= ~SDHCI_INT_ADMA_ERROR;
+ val |= SDHCI_INT_VENDOR_SPEC_DMA_ERR;
+ }
+ }
+
writel(val, host->ioaddr + reg);
}
static u16 esdhc_readw_le(struct sdhci_host *host, int reg)
{
- if (unlikely(reg == SDHCI_HOST_VERSION))
- reg ^= 2;
+ if (unlikely(reg == SDHCI_HOST_VERSION)) {
+ u16 val = readw(host->ioaddr + (reg ^ 2));
+ /*
+ * uSDHC supports SDHCI v3.0, but it's encoded as value
+ * 0x3 in host controller version register, which violates
+ * SDHCI_SPEC_300 definition. Work it around here.
+ */
+ if ((val & SDHCI_SPEC_VER_MASK) == 3)
+ return --val;
+ }
return readw(host->ioaddr + reg);
}
@@ -216,8 +271,17 @@ static void esdhc_writew_le(struct sdhci_host *host, u16 val, int reg)
if ((host->cmd->opcode == MMC_STOP_TRANSMISSION)
&& (imx_data->flags & ESDHC_FLAG_MULTIBLK_NO_INT))
val |= SDHCI_CMD_ABORTCMD;
- writel(val << 16 | imx_data->scratchpad,
- host->ioaddr + SDHCI_TRANSFER_MODE);
+
+ if (is_imx6q_usdhc(imx_data)) {
+ u32 m = readl(host->ioaddr + SDHCI_MIX_CTRL);
+ m = imx_data->scratchpad | (m & 0xffff0000);
+ writel(m, host->ioaddr + SDHCI_MIX_CTRL);
+ writel(val << 16,
+ host->ioaddr + SDHCI_TRANSFER_MODE);
+ } else {
+ writel(val << 16 | imx_data->scratchpad,
+ host->ioaddr + SDHCI_TRANSFER_MODE);
+ }
return;
case SDHCI_BLOCK_SIZE:
val &= ~SDHCI_MAKE_BLKSZ(0x7, 0);
@@ -311,9 +375,10 @@ static struct sdhci_ops sdhci_esdhc_ops = {
};
static struct sdhci_pltfm_data sdhci_esdhc_imx_pdata = {
- .quirks = ESDHC_DEFAULT_QUIRKS | SDHCI_QUIRK_BROKEN_ADMA
+ .quirks = ESDHC_DEFAULT_QUIRKS | SDHCI_QUIRK_NO_HISPD_BIT
+ | SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC
+ | SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC
| SDHCI_QUIRK_BROKEN_CARD_DETECTION,
- /* ADMA has issues. Might be fixable */
.ops = &sdhci_esdhc_ops,
};
@@ -405,7 +470,8 @@ static int __devinit sdhci_esdhc_imx_probe(struct platform_device *pdev)
if (is_imx25_esdhc(imx_data) || is_imx35_esdhc(imx_data))
/* Fix errata ENGcm07207 present on i.MX25 and i.MX35 */
- host->quirks |= SDHCI_QUIRK_NO_MULTIBLOCK;
+ host->quirks |= SDHCI_QUIRK_NO_MULTIBLOCK
+ | SDHCI_QUIRK_BROKEN_ADMA;
if (is_imx53_esdhc(imx_data))
imx_data->flags |= ESDHC_FLAG_MULTIBLK_NO_INT;