mmc: core: Enable tuning according to the actual timing

commit e10c321977091f163eceedec0650e0ef4b3cf4bb upstream.

While in sdhci_execute_tuning() the choice whether or not to enable the
tuning is done on the actual timing, in the mmc_sdio_init_uhs_card() the
check is done on the capability of the card.

This difference is causing some issues with some SDIO cards in DDR50
mode where the CDM19 is wrongly issued.

With this patch we modify the check in both
mmc_(sd|sdio)_init_uhs_card() functions to take the proper decision
only according to the actual timing specification.

Signed-off-by: Carlo Caione <carlo@endlessm.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c
index 141eaa923e18eecc140039d34604d5f2969c023b..967535d76e3468199979be0ffff23a7d0d3c2a93 100644 (file)
--- a/drivers/mmc/core/sd.c
+++ b/drivers/mmc/core/sd.c
@@ -626,9 +626,9 @@ static int mmc_sd_init_uhs_card(struct mmc_card *card)
         * SDR104 mode SD-cards. Note that tuning is mandatory for SDR104.
         */
        if (!mmc_host_is_spi(card->host) &&
-               (card->sd_bus_speed == UHS_SDR50_BUS_SPEED ||
-                card->sd_bus_speed == UHS_DDR50_BUS_SPEED ||
-                card->sd_bus_speed == UHS_SDR104_BUS_SPEED)) {
+               (card->host->ios.timing == MMC_TIMING_UHS_SDR50 ||
+                card->host->ios.timing == MMC_TIMING_UHS_DDR50 ||
+                card->host->ios.timing == MMC_TIMING_UHS_SDR104)) {
                err = mmc_execute_tuning(card);
 
                /*
@@ -638,7 +638,7 @@ static int mmc_sd_init_uhs_card(struct mmc_card *card)
                 * difference between v3.00 and 3.01 spec means that CMD19
                 * tuning is also available for DDR50 mode.
                 */
-               if (err && card->sd_bus_speed == UHS_DDR50_BUS_SPEED) {
+               if (err && card->host->ios.timing == MMC_TIMING_UHS_DDR50) {
                        pr_warn("%s: ddr50 tuning failed\n",
                                mmc_hostname(card->host));
                        err = 0;

diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c
index d61ba1a0495ebe828ba8c110da3d9053b506079b..467b3cf80c44549c704080d78540c46599eb6882 100644 (file)
--- a/drivers/mmc/core/sdio.c
+++ b/drivers/mmc/core/sdio.c
@@ -535,8 +535,8 @@ static int mmc_sdio_init_uhs_card(struct mmc_card *card)
         * SDR104 mode SD-cards. Note that tuning is mandatory for SDR104.
         */
        if (!mmc_host_is_spi(card->host) &&
-           ((card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR50) ||
-            (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR104)))
+           ((card->host->ios.timing == MMC_TIMING_UHS_SDR50) ||
+             (card->host->ios.timing == MMC_TIMING_UHS_SDR104)))
                err = mmc_execute_tuning(card);
 out:
        return err;