diff options
| author |   Chris Ball <cjb@laptop.org> | 2010-03-05 13:43:33 -0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2010-03-06 11:26:37 -0800 |
| commit | 3bca4cf703826fcb2bbabbe19c6fc7b2fc4fd7cc (patch) | |
| tree | 6be86594d47aaf9f61febba43cbc0e470bfadabb /drivers/mmc/core | |
| parent | sdio: sdhci support for suspend mode PM features (diff) | |
| download | linux-dev-3bca4cf703826fcb2bbabbe19c6fc7b2fc4fd7cc.tar.xz linux-dev-3bca4cf703826fcb2bbabbe19c6fc7b2fc4fd7cc.zip | |
sdio: don't use CMD[357] as part of a powered SDIO resume
Seen on a Marvell 8686 SDIO card and Via VX855 controller: we must avoid
sending CMD3/5/7 on a resume where power has been maintained, because the
8686 will refuse to respond to them and the MMC stack will give up on the
card.
Signed-off-by: Chris Ball <cjb@laptop.org>
Signed-off-by: Nicolas Pitre <nico@marvell.com>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/mmc/core')
| -rw-r--r-- | drivers/mmc/core/sdio.c | 19 |
1 files changed, 11 insertions, 8 deletions
diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c index 06b64085a355..7d8ba64b0170 100644 --- a/drivers/mmc/core/sdio.c +++ b/drivers/mmc/core/sdio.c @@ -224,7 +224,7 @@ static int sdio_enable_hs(struct mmc_card *card) * we're trying to reinitialise. */ static int mmc_sdio_init_card(struct mmc_host *host, u32 ocr, - struct mmc_card *oldcard) + struct mmc_card *oldcard, int powered_resume) { struct mmc_card *card; int err; @@ -235,9 +235,11 @@ static int mmc_sdio_init_card(struct mmc_host *host, u32 ocr, /* * Inform the card of the voltage */ - err = mmc_send_io_op_cond(host, host->ocr, &ocr); - if (err) - goto err; + if (!powered_resume) { + err = mmc_send_io_op_cond(host, host->ocr, &ocr); + if (err) + goto err; + } /* * For SPI, enable CRC as appropriate. @@ -262,7 +264,7 @@ static int mmc_sdio_init_card(struct mmc_host *host, u32 ocr, /* * For native busses: set card RCA and quit open drain mode. */ - if (!mmc_host_is_spi(host)) { + if (!powered_resume && !mmc_host_is_spi(host)) { err = mmc_send_relative_addr(host, &card->rca); if (err) goto remove; @@ -273,7 +275,7 @@ static int mmc_sdio_init_card(struct mmc_host *host, u32 ocr, /* * Select card, as all following commands rely on that. */ - if (!mmc_host_is_spi(host)) { + if (!powered_resume && !mmc_host_is_spi(host)) { err = mmc_select_card(card); if (err) goto remove; @@ -437,7 +439,8 @@ static int mmc_sdio_resume(struct mmc_host *host) /* Basic card reinitialization. */ mmc_claim_host(host); - err = mmc_sdio_init_card(host, host->ocr, host->card); + err = mmc_sdio_init_card(host, host->ocr, host->card, + (host->pm_flags & MMC_PM_KEEP_POWER)); mmc_release_host(host); /* @@ -507,7 +510,7 @@ int mmc_attach_sdio(struct mmc_host *host, u32 ocr) /* * Detect and init the card. */ - err = mmc_sdio_init_card(host, host->ocr, NULL); + err = mmc_sdio_init_card(host, host->ocr, NULL, 0); if (err) goto err; card = host->card; |