The eSDHC of T4240-R1.0-R2.0 has incorrect vender version and spec version.
Acturally, the right version numbers should be VVN=0x13 and SVN = 0x1.
So, fix it in driver to avoid that incorrect version numbers break down the
ADMA data transfer.
Signed-off-by: Yangbo Lu <yangbo.lu@xxxxxxxxxxxxx>
---
Changes for v2:
- None
Changes for v3:
- Got SoC version/revision from struct sdhci_esdhc instead of global variables
---
drivers/mmc/host/sdhci-of-esdhc.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/mmc/host/sdhci-of-esdhc.c b/drivers/mmc/host/sdhci-of-esdhc.c
index fce24b7..3a47243 100644
--- a/drivers/mmc/host/sdhci-of-esdhc.c
+++ b/drivers/mmc/host/sdhci-of-esdhc.c
@@ -78,6 +78,8 @@ static u32 esdhc_readl_fixup(struct sdhci_host *host,
static u16 esdhc_readw_fixup(struct sdhci_host *host,
int spec_reg, u32 value)
{
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_esdhc *esdhc = pltfm_host->priv;
u16 ret;
int shift = (spec_reg & 0x2) * 8;
@@ -85,6 +87,13 @@ static u16 esdhc_readw_fixup(struct sdhci_host *host,
ret = value & 0xffff;
else
ret = (value >> shift) & 0xffff;
+
+ /* Workaround for T4240-R1.0-R2.0 eSDHC which has incorrect
+ * vendor version and spec version information.
+ */
+ if ((spec_reg == SDHCI_HOST_VERSION) &&
+ (esdhc->soc_ver == SVR_T4240) && (esdhc->soc_rev <= 0x20))
+ ret = (VENDOR_V_23 << SDHCI_VENDOR_VER_SHIFT) | SDHCI_SPEC_200;
return ret;
}
--
2.1.0.27.g96db324
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