diff options
Diffstat (limited to 'drivers/mmc/core/sd.c')
| -rw-r--r-- | drivers/mmc/core/sd.c | 68 |
1 files changed, 64 insertions, 4 deletions
diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c index 9e645e19cec6..176d125f5b57 100644 --- a/drivers/mmc/core/sd.c +++ b/drivers/mmc/core/sd.c @@ -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); @@ -1037,14 +1042,14 @@ static void mmc_sd_detect(struct mmc_host *host) BUG_ON(!host); BUG_ON(!host->card); - mmc_claim_host(host); + mmc_get_card(host->card); /* * Just check if our card has been removed. */ err = _mmc_detect_card_removed(host); - mmc_release_host(host); + mmc_put_card(host->card); if (err) { mmc_sd_remove(host); @@ -1070,6 +1075,8 @@ static int mmc_sd_suspend(struct mmc_host *host) if (!mmc_host_is_spi(host)) err = mmc_deselect_cards(host); host->card->state &= ~MMC_STATE_HIGHSPEED; + if (!err) + mmc_power_off(host); mmc_release_host(host); return err; @@ -1089,12 +1096,61 @@ static int mmc_sd_resume(struct mmc_host *host) BUG_ON(!host->card); mmc_claim_host(host); + mmc_power_up(host); + mmc_select_voltage(host, host->ocr); err = mmc_sd_init_card(host, host->ocr, host->card); mmc_release_host(host); return err; } +/* + * Callback for runtime_suspend. + */ +static int mmc_sd_runtime_suspend(struct mmc_host *host) +{ + int err; + + if (!(host->caps & MMC_CAP_AGGRESSIVE_PM)) + return 0; + + mmc_claim_host(host); + + err = mmc_sd_suspend(host); + if (err) { + pr_err("%s: error %d doing aggessive suspend\n", + mmc_hostname(host), err); + goto out; + } + mmc_power_off(host); + +out: + mmc_release_host(host); + return err; +} + +/* + * Callback for runtime_resume. + */ +static int mmc_sd_runtime_resume(struct mmc_host *host) +{ + int err; + + if (!(host->caps & MMC_CAP_AGGRESSIVE_PM)) + return 0; + + mmc_claim_host(host); + + mmc_power_up(host); + err = mmc_sd_resume(host); + if (err) + pr_err("%s: error %d doing aggessive resume\n", + mmc_hostname(host), err); + + mmc_release_host(host); + return 0; +} + static int mmc_sd_power_restore(struct mmc_host *host) { int ret; @@ -1114,15 +1170,19 @@ static const struct mmc_bus_ops mmc_sd_ops = { .resume = NULL, .power_restore = mmc_sd_power_restore, .alive = mmc_sd_alive, + .shutdown = mmc_sd_suspend, }; static const struct mmc_bus_ops mmc_sd_ops_unsafe = { .remove = mmc_sd_remove, .detect = mmc_sd_detect, + .runtime_suspend = mmc_sd_runtime_suspend, + .runtime_resume = mmc_sd_runtime_resume, .suspend = mmc_sd_suspend, .resume = mmc_sd_resume, .power_restore = mmc_sd_power_restore, .alive = mmc_sd_alive, + .shutdown = mmc_sd_suspend, }; static void mmc_sd_attach_bus_ops(struct mmc_host *host) |