For T4240-R1.0-R2.0, the HOSTVER register has incorrcet vender version value and sdhc spec version value. This will break down the ADMA data transfer. So add workaround to get right value VVN=0x13, SVN = 0x1.
Signed-off-by: Yangbo Lu <[email protected]> --- drivers/mmc/host/sdhci-of-esdhc.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/mmc/host/sdhci-of-esdhc.c b/drivers/mmc/host/sdhci-of-esdhc.c index 20e0b9a..84496f0 100644 --- a/drivers/mmc/host/sdhci-of-esdhc.c +++ b/drivers/mmc/host/sdhci-of-esdhc.c @@ -70,6 +70,14 @@ static u16 esdhc_readw(struct sdhci_host *host, int reg) ret = in_be32(host->ioaddr + base) & 0xffff; else ret = (in_be32(host->ioaddr + base) >> shift) & 0xffff; + + /* Workaround for T4240-R1.0-R2.0 eSDHC which has incorrect + * vendor version and spec version information. + */ + if ((reg == SDHCI_HOST_VERSION) && + (soc_ver == SVR_T4240) && (soc_rev <= 0x20)) + ret = (VENDOR_V_23 << SDHCI_VENDOR_VER_SHIFT) | SDHCI_SPEC_200; + return ret; } -- 2.1.0.27.g96db324 -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
