korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-11-18 01:34:14 +08:00
Code Issues Packages Projects Releases Wiki Activity

sdio: don't use CMD[357] as part of a powered SDIO resume

Browse Source 
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>
This commit is contained in:
Chris Ball 2010-03-05 13:43:33 -08:00 committed by Linus Torvalds
parent 2f4cbb3d83
commit 3bca4cf703
1 changed files with 11 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
drivers/mmc/core/sdio.c
View File

@ -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;