mmc: mmc: Fix partition switch timeout for some eMMCs

[pandora-kernel.git] / drivers / mmc / core / mmc.c

diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index d240427..408000d 100644 (file)
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -235,6 +235,9 @@ static int mmc_get_ext_csd(struct mmc_card *card, u8 **new_ext_csd)
        return err;
 }
 
+/* Minimum partition switch timeout in milliseconds */
+#define MMC_MIN_PART_SWITCH_TIME       300
+
 /*
  * Decode extended CSD.
  */
@@ -325,6 +328,10 @@ static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd)
 
                /* EXT_CSD value is in units of 10ms, but we store in ms */
                card->ext_csd.part_time = 10 * ext_csd[EXT_CSD_PART_SWITCH_TIME];
+               /* Some eMMC set the value too low so set a minimum */
+               if (card->ext_csd.part_time &&
+                   card->ext_csd.part_time < MMC_MIN_PART_SWITCH_TIME)
+                       card->ext_csd.part_time = MMC_MIN_PART_SWITCH_TIME;
 
                /* Sleep / awake timeout in 100ns units */
                if (sa_shift > 0 && sa_shift <= 0x17)
@@ -363,13 +370,13 @@ static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd)
                ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
        card->ext_csd.raw_trim_mult =
                ext_csd[EXT_CSD_TRIM_MULT];
+       card->ext_csd.raw_partition_support = ext_csd[EXT_CSD_PARTITION_SUPPORT];
        if (card->ext_csd.rev >= 4) {
                /*
                 * Enhanced area feature support -- check whether the eMMC
                 * card has the Enhanced area enabled.  If so, export enhanced
                 * area offset and size to user by adding sysfs interface.
                 */
-               card->ext_csd.raw_partition_support = ext_csd[EXT_CSD_PARTITION_SUPPORT];
                if ((ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x2) &&
                    (ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) {
                        hc_erase_grp_sz =
@@ -1048,7 +1055,7 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
                         *
                         * WARNING: eMMC rules are NOT the same as SD DDR
                         */
-                       if (ddr == EXT_CSD_CARD_TYPE_DDR_1_2V) {
+                       if (ddr == MMC_1_2V_DDR_MODE) {
                                err = mmc_set_signal_voltage(host,
                                        MMC_SIGNAL_VOLTAGE_120, 0);
                                if (err)