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mmc: core: Only execute tuning for SDR50 and SDR104

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Only execute tuning for sd and sdio devices that are using
SDR50 or SDR104.

Make sure clock is hold during tuning for sdio devices.

Signed-off-by: Fredrik Soderstedt <fredrik.soderstedt@stericsson.com>
Acked-by: Johan Rudholm <jrudholm@gmail.com>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
This commit is contained in:
Fredrik Soderstedt 2013-04-17 13:50:53 +02:00 committed by Chris Ball
parent 4a29b5591f
commit 810e08ee42
2 changed files with 17 additions and 4 deletions
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9
drivers/mmc/core/sd.c
View File

@ -646,8 +646,13 @@ static int mmc_sd_init_uhs_card(struct mmc_card *card)
if (err)
goto out;
/* SPI mode doesn't define CMD19 */
if (!mmc_host_is_spi(card->host) && card->host->ops->execute_tuning) {
/*
* SPI mode doesn't define CMD19 and tuning is only valid for SDR50 and
* SDR104 mode SD-cards. Note that tuning is mandatory for SDR104.
*/
if (!mmc_host_is_spi(card->host) && card->host->ops->execute_tuning &&
(card->sd_bus_speed == UHS_SDR50_BUS_SPEED ||
card->sd_bus_speed == UHS_SDR104_BUS_SPEED)) {
mmc_host_clk_hold(card->host);
err = card->host->ops->execute_tuning(card->host,
MMC_SEND_TUNING_BLOCK);

12
drivers/mmc/core/sdio.c
View File

@ -563,10 +563,18 @@ static int mmc_sdio_init_uhs_card(struct mmc_card *card)
if (err)
goto out;
/* Initialize and start re-tuning timer */
if (!mmc_host_is_spi(card->host) && card->host->ops->execute_tuning)
/*
* SPI mode doesn't define CMD19 and tuning is only valid for SDR50 and
* SDR104 mode SD-cards. Note that tuning is mandatory for SDR104.
*/
if (!mmc_host_is_spi(card->host) && card->host->ops->execute_tuning &&
((card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR50) ||
(card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR104))) {
mmc_host_clk_hold(card->host);
err = card->host->ops->execute_tuning(card->host,
MMC_SEND_TUNING_BLOCK);
mmc_host_clk_release(card->host);
}
out: