diff options
Diffstat (limited to 'drivers/mmc/core/sd.c')
-rw-r--r-- | drivers/mmc/core/sd.c | 163 |
1 files changed, 120 insertions, 43 deletions
diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c index 9e645e1..6f42050 100644 --- a/drivers/mmc/core/sd.c +++ b/drivers/mmc/core/sd.c @@ -13,6 +13,7 @@ #include <linux/err.h> #include <linux/slab.h> #include <linux/stat.h> +#include <linux/pm_runtime.h> #include <linux/mmc/host.h> #include <linux/mmc/card.h> @@ -215,7 +216,7 @@ static int mmc_decode_scr(struct mmc_card *card) static int mmc_read_ssr(struct mmc_card *card) { unsigned int au, es, et, eo; - int err, i; + int err, i, max_au; u32 *ssr; if (!(card->csd.cmdclass & CCC_APP_SPEC)) { @@ -239,12 +240,15 @@ static int mmc_read_ssr(struct mmc_card *card) for (i = 0; i < 16; i++) ssr[i] = be32_to_cpu(ssr[i]); + /* SD3.0 increases max AU size to 64MB (0xF) from 4MB (0x9) */ + max_au = card->scr.sda_spec3 ? 0xF : 0x9; + /* * UNSTUFF_BITS only works with four u32s so we have to offset the * bitfield positions accordingly. */ au = UNSTUFF_BITS(ssr, 428 - 384, 4); - if (au > 0 && au <= 9) { + if (au > 0 && au <= max_au) { card->ssr.au = 1 << (au + 4); es = UNSTUFF_BITS(ssr, 408 - 384, 16); et = UNSTUFF_BITS(ssr, 402 - 384, 6); @@ -646,8 +650,13 @@ 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); @@ -713,6 +722,7 @@ int mmc_sd_get_cid(struct mmc_host *host, u32 ocr, u32 *cid, u32 *rocr) int err; u32 max_current; int retries = 10; + u32 pocr = ocr; try_again: if (!retries) { @@ -765,7 +775,8 @@ try_again: */ if (!mmc_host_is_spi(host) && rocr && ((*rocr & 0x41000000) == 0x41000000)) { - err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180); + err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180, + pocr); if (err == -EAGAIN) { retries--; goto try_again; @@ -927,6 +938,7 @@ static int mmc_sd_init_card(struct mmc_host *host, u32 ocr, if (IS_ERR(card)) return PTR_ERR(card); + card->ocr = ocr; card->type = MMC_TYPE_SD; memcpy(card->raw_cid, cid, sizeof(card->raw_cid)); } @@ -937,13 +949,13 @@ static int mmc_sd_init_card(struct mmc_host *host, u32 ocr, if (!mmc_host_is_spi(host)) { err = mmc_send_relative_addr(host, &card->rca); if (err) - return err; + goto free_card; } if (!oldcard) { err = mmc_sd_get_csd(host, card); if (err) - return err; + goto free_card; mmc_decode_cid(card); } @@ -954,7 +966,7 @@ static int mmc_sd_init_card(struct mmc_host *host, u32 ocr, if (!mmc_host_is_spi(host)) { err = mmc_select_card(card); if (err) - return err; + goto free_card; } err = mmc_sd_setup_card(host, card, oldcard != NULL); @@ -1037,14 +1049,14 @@ 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); @@ -1056,10 +1068,7 @@ static void mmc_sd_detect(struct mmc_host *host) } } -/* - * Suspend callback from host. - */ -static int mmc_sd_suspend(struct mmc_host *host) +static int _mmc_sd_suspend(struct mmc_host *host) { int err = 0; @@ -1067,41 +1076,124 @@ static int mmc_sd_suspend(struct mmc_host *host) BUG_ON(!host->card); mmc_claim_host(host); + + if (mmc_card_suspended(host->card)) + goto out; + if (!mmc_host_is_spi(host)) err = mmc_deselect_cards(host); host->card->state &= ~MMC_STATE_HIGHSPEED; + if (!err) { + mmc_power_off(host); + mmc_card_set_suspended(host->card); + } + +out: mmc_release_host(host); + return err; +} + +/* + * Callback for suspend + */ +static int mmc_sd_suspend(struct mmc_host *host) +{ + int err; + + err = _mmc_sd_suspend(host); + if (!err) { + pm_runtime_disable(&host->card->dev); + pm_runtime_set_suspended(&host->card->dev); + } return err; } /* - * Resume callback from host. - * * This function tries to determine if the same card is still present * and, if so, restore all state to it. */ -static int mmc_sd_resume(struct mmc_host *host) +static int _mmc_sd_resume(struct mmc_host *host) { - int err; + int err = 0; BUG_ON(!host); BUG_ON(!host->card); mmc_claim_host(host); - err = mmc_sd_init_card(host, host->ocr, host->card); + + if (!mmc_card_suspended(host->card)) + goto out; + + mmc_power_up(host, host->card->ocr); + err = mmc_sd_init_card(host, host->card->ocr, host->card); + mmc_card_clr_suspended(host->card); + +out: mmc_release_host(host); + return err; +} + +/* + * Callback for resume + */ +static int mmc_sd_resume(struct mmc_host *host) +{ + int err = 0; + + if (!(host->caps & MMC_CAP_RUNTIME_RESUME)) { + err = _mmc_sd_resume(host); + pm_runtime_set_active(&host->card->dev); + pm_runtime_mark_last_busy(&host->card->dev); + } + pm_runtime_enable(&host->card->dev); + + 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; + + err = _mmc_sd_suspend(host); + if (err) + pr_err("%s: error %d doing aggessive suspend\n", + mmc_hostname(host), err); 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 | MMC_CAP_RUNTIME_RESUME))) + return 0; + + err = _mmc_sd_resume(host); + if (err) + pr_err("%s: error %d doing aggessive resume\n", + mmc_hostname(host), err); + + return 0; +} + static int mmc_sd_power_restore(struct mmc_host *host) { int ret; host->card->state &= ~MMC_STATE_HIGHSPEED; mmc_claim_host(host); - ret = mmc_sd_init_card(host, host->ocr, host->card); + ret = mmc_sd_init_card(host, host->card->ocr, host->card); mmc_release_host(host); return ret; @@ -1114,15 +1206,19 @@ 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) @@ -1142,7 +1238,7 @@ static void mmc_sd_attach_bus_ops(struct mmc_host *host) int mmc_attach_sd(struct mmc_host *host) { int err; - u32 ocr; + u32 ocr, rocr; BUG_ON(!host); WARN_ON(!host->claimed); @@ -1166,31 +1262,12 @@ int mmc_attach_sd(struct mmc_host *host) goto err; } - /* - * Sanity check the voltages that the card claims to - * support. - */ - if (ocr & 0x7F) { - pr_warning("%s: card claims to support voltages " - "below the defined range. These will be ignored.\n", - mmc_hostname(host)); - ocr &= ~0x7F; - } - - if ((ocr & MMC_VDD_165_195) && - !(host->ocr_avail_sd & MMC_VDD_165_195)) { - pr_warning("%s: SD card claims to support the " - "incompletely defined 'low voltage range'. This " - "will be ignored.\n", mmc_hostname(host)); - ocr &= ~MMC_VDD_165_195; - } - - host->ocr = mmc_select_voltage(host, ocr); + rocr = mmc_select_voltage(host, ocr); /* * Can we support the voltage(s) of the card(s)? */ - if (!host->ocr) { + if (!rocr) { err = -EINVAL; goto err; } @@ -1198,7 +1275,7 @@ int mmc_attach_sd(struct mmc_host *host) /* * Detect and init the card. */ - err = mmc_sd_init_card(host, host->ocr, NULL); + err = mmc_sd_init_card(host, rocr, NULL); if (err) goto err; |