diff options
Diffstat (limited to 'drivers/mmc/core/sdio.c')
| -rw-r--r-- | drivers/mmc/core/sdio.c | 135 |
1 files changed, 114 insertions, 21 deletions
diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c index 47d1708810bd..b0b6ce93e519 100644 --- a/drivers/mmc/core/sdio.c +++ b/drivers/mmc/core/sdio.c @@ -160,9 +160,7 @@ static int sdio_enable_wide(struct mmc_card *card) if (ret) return ret; - mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4); - - return 0; + return 1; } /* @@ -222,10 +220,34 @@ static int sdio_disable_wide(struct mmc_card *card) return 0; } + +static int sdio_enable_4bit_bus(struct mmc_card *card) +{ + int err; + + if (card->type == MMC_TYPE_SDIO) + return sdio_enable_wide(card); + + if ((card->host->caps & MMC_CAP_4_BIT_DATA) && + (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) { + err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4); + if (err) + return err; + } else + return 0; + + err = sdio_enable_wide(card); + if (err <= 0) + mmc_app_set_bus_width(card, MMC_BUS_WIDTH_1); + + return err; +} + + /* * Test if the card supports high-speed mode and, if so, switch to it. */ -static int sdio_enable_hs(struct mmc_card *card) +static int mmc_sdio_switch_hs(struct mmc_card *card, int enable) { int ret; u8 speed; @@ -240,7 +262,10 @@ static int sdio_enable_hs(struct mmc_card *card) if (ret) return ret; - speed |= SDIO_SPEED_EHS; + if (enable) + speed |= SDIO_SPEED_EHS; + else + speed &= ~SDIO_SPEED_EHS; ret = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_SPEED, speed, NULL); if (ret) @@ -249,6 +274,24 @@ static int sdio_enable_hs(struct mmc_card *card) return 1; } +/* + * Enable SDIO/combo card's high-speed mode. Return 0/1 if [not]supported. + */ +static int sdio_enable_hs(struct mmc_card *card) +{ + int ret; + + ret = mmc_sdio_switch_hs(card, true); + if (ret <= 0 || card->type == MMC_TYPE_SDIO) + return ret; + + ret = mmc_sd_switch_hs(card); + if (ret <= 0) + mmc_sdio_switch_hs(card, false); + + return ret; +} + static unsigned mmc_sdio_get_max_clock(struct mmc_card *card) { unsigned max_dtr; @@ -265,6 +308,9 @@ static unsigned mmc_sdio_get_max_clock(struct mmc_card *card) max_dtr = card->cis.max_dtr; } + if (card->type == MMC_TYPE_SD_COMBO) + max_dtr = min(max_dtr, mmc_sd_get_max_clock(card)); + return max_dtr; } @@ -310,7 +356,24 @@ static int mmc_sdio_init_card(struct mmc_host *host, u32 ocr, goto err; } - card->type = MMC_TYPE_SDIO; + err = mmc_sd_get_cid(host, host->ocr & ocr, card->raw_cid); + + if (!err) { + card->type = MMC_TYPE_SD_COMBO; + + if (oldcard && (oldcard->type != MMC_TYPE_SD_COMBO || + memcmp(card->raw_cid, oldcard->raw_cid, sizeof(card->raw_cid)) != 0)) { + mmc_remove_card(card); + return -ENOENT; + } + } else { + card->type = MMC_TYPE_SDIO; + + if (oldcard && oldcard->type != MMC_TYPE_SDIO) { + mmc_remove_card(card); + return -ENOENT; + } + } /* * Call the optional HC's init_card function to handle quirks. @@ -330,6 +393,17 @@ static int mmc_sdio_init_card(struct mmc_host *host, u32 ocr, } /* + * Read CSD, before selecting the card + */ + if (!oldcard && card->type == MMC_TYPE_SD_COMBO) { + err = mmc_sd_get_csd(host, card); + if (err) + return err; + + mmc_decode_cid(card); + } + + /* * Select card, as all following commands rely on that. */ if (!powered_resume && !mmc_host_is_spi(host)) { @@ -356,14 +430,33 @@ static int mmc_sdio_init_card(struct mmc_host *host, u32 ocr, int same = (card->cis.vendor == oldcard->cis.vendor && card->cis.device == oldcard->cis.device); mmc_remove_card(card); - if (!same) { - err = -ENOENT; - goto err; - } + if (!same) + return -ENOENT; + card = oldcard; return 0; } + if (card->type == MMC_TYPE_SD_COMBO) { + err = mmc_sd_setup_card(host, card, oldcard != NULL); + /* handle as SDIO-only card if memory init failed */ + if (err) { + mmc_go_idle(host); + if (mmc_host_is_spi(host)) + /* should not fail, as it worked previously */ + mmc_spi_set_crc(host, use_spi_crc); + card->type = MMC_TYPE_SDIO; + } else + card->dev.type = &sd_type; + } + + /* + * If needed, disconnect card detection pull-up resistor. + */ + err = sdio_disable_cd(card); + if (err) + goto remove; + /* * Switch to high-speed (if supported). */ @@ -381,8 +474,10 @@ static int mmc_sdio_init_card(struct mmc_host *host, u32 ocr, /* * Switch to wider bus (if supported). */ - err = sdio_enable_wide(card); - if (err) + err = sdio_enable_4bit_bus(card); + if (err > 0) + mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4); + else if (err) goto remove; if (!oldcard) @@ -496,9 +591,14 @@ static int mmc_sdio_resume(struct mmc_host *host) mmc_claim_host(host); err = mmc_sdio_init_card(host, host->ocr, host->card, (host->pm_flags & MMC_PM_KEEP_POWER)); - if (!err) + if (!err) { /* We may have switched to 1-bit mode during suspend. */ - err = sdio_enable_wide(host->card); + err = sdio_enable_4bit_bus(host->card); + if (err > 0) { + mmc_set_bus_width(host, MMC_BUS_WIDTH_4); + err = 0; + } + } if (!err && host->sdio_irqs) mmc_signal_sdio_irq(host); mmc_release_host(host); @@ -583,13 +683,6 @@ int mmc_attach_sdio(struct mmc_host *host, u32 ocr) card->sdio_funcs = 0; /* - * If needed, disconnect card detection pull-up resistor. - */ - err = sdio_disable_cd(card); - if (err) - goto remove; - - /* * Initialize (but don't add) all present functions. */ for (i = 0; i < funcs; i++, card->sdio_funcs++) { |