From 7f7e4129c23f0419257184dff6fec89d2d5a8964 Mon Sep 17 00:00:00 2001 From: Ulf Hansson Date: Wed, 21 Sep 2011 14:08:13 -0400 Subject: mmc: core: Fix hangs related to insert/remove of cards During a rescan operation mmc_attach(sd|mmc|sdio) functions are called. The error handling in these function can trigger a detach of the bus, which also meant a power off. This is not notified by the rescan operation which then continues to the next attach function. If a power off has been done, the framework must never send any new commands to the host driver, without first doing a new power up. This will most likely trigger any host driver to hang. Moving power off out of detach and instead handle power off separately when it is actually needed, solves the issue. Signed-off-by: Ulf Hansson Acked-by: Linus Walleij Cc: Signed-off-by: Chris Ball --- drivers/mmc/core/sdio.c | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/mmc/core/sdio.c') diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c index 262fff019177..ac492ac974e1 100644 --- a/drivers/mmc/core/sdio.c +++ b/drivers/mmc/core/sdio.c @@ -597,6 +597,7 @@ out: mmc_claim_host(host); mmc_detach_bus(host); + mmc_power_off(host); mmc_release_host(host); } } -- cgit From 44669034815a7ad263542ac605c581a10b22d146 Mon Sep 17 00:00:00 2001 From: Stefan Nilsson XK Date: Thu, 15 Sep 2011 17:50:38 +0200 Subject: mmc: core: Set correct bus mode before card init Earlier all cards where initiated with bus mode set as OPENDRAIN, and then later switched to PUSHPULL. According to the MMC/SD/SDIO specifications only MMC cards use OPENDRAIN during init. For both SD and SDIO the bus mode shall be PUSHPULL before attempting to init the card. The consequence of having incorrect bus mode can lead to not being able to detect the card. Therefore the default behavior have now been changed to PUSHPULL in mmc_power_up, and will only be temporarily switched when trying to attach or init a MMC card. Signed-off-by: Stefan Nilsson XK Signed-off-by: Ulf HANSSON Acked-by: Linus Walleij Signed-off-by: Chris Ball --- drivers/mmc/core/sdio.c | 2 -- 1 file changed, 2 deletions(-) (limited to 'drivers/mmc/core/sdio.c') diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c index ac492ac974e1..698d813cff3b 100644 --- a/drivers/mmc/core/sdio.c +++ b/drivers/mmc/core/sdio.c @@ -408,8 +408,6 @@ static int mmc_sdio_init_card(struct mmc_host *host, u32 ocr, */ if (oldcard) oldcard->rca = card->rca; - - mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL); } /* -- cgit From a3c76eb9d4a1e68a69dd880cf0bcb8a52418b993 Mon Sep 17 00:00:00 2001 From: Girish K S Date: Tue, 11 Oct 2011 11:44:09 +0530 Subject: mmc: replace printk with appropriate display macro All the files using printk function for displaying kernel messages in the mmc driver have been replaced with corresponding macro. Signed-off-by: Girish K S Signed-off-by: Chris Ball --- drivers/mmc/core/sdio.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'drivers/mmc/core/sdio.c') diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c index 698d813cff3b..925bab052b07 100644 --- a/drivers/mmc/core/sdio.c +++ b/drivers/mmc/core/sdio.c @@ -112,7 +112,7 @@ static int sdio_read_cccr(struct mmc_card *card) cccr_vsn = data & 0x0f; if (cccr_vsn > SDIO_CCCR_REV_1_20) { - printk(KERN_ERR "%s: unrecognised CCCR structure version %d\n", + pr_err("%s: unrecognised CCCR structure version %d\n", mmc_hostname(card->host), cccr_vsn); return -EINVAL; } @@ -777,7 +777,7 @@ int mmc_attach_sdio(struct mmc_host *host) * support. */ if (ocr & 0x7F) { - printk(KERN_WARNING "%s: card claims to support voltages " + pr_warning("%s: card claims to support voltages " "below the defined range. These will be ignored.\n", mmc_hostname(host)); ocr &= ~0x7F; @@ -874,7 +874,7 @@ remove: err: mmc_detach_bus(host); - printk(KERN_ERR "%s: error %d whilst initialising SDIO card\n", + pr_err("%s: error %d whilst initialising SDIO card\n", mmc_hostname(host), err); return err; -- cgit From b4625dab2c618eb87e177761dda3182b4cfaa604 Mon Sep 17 00:00:00 2001 From: Bing Zhao Date: Thu, 20 Oct 2011 19:16:32 -0700 Subject: mmc: recognise SDIO cards with SDIO_CCCR_REV 3.00 Table 6-2: CCCR bit Definitions, address 00h. Part E1 SDIO Simplified Specification Version 3.00, Feb. 25, 2011. This patch has been tested with Marvell WLAN device SD8797. Signed-off-by: Bing Zhao Signed-off-by: Chris Ball --- drivers/mmc/core/sdio.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/mmc/core/sdio.c') diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c index 925bab052b07..3ab565e32a6a 100644 --- a/drivers/mmc/core/sdio.c +++ b/drivers/mmc/core/sdio.c @@ -111,7 +111,7 @@ static int sdio_read_cccr(struct mmc_card *card) cccr_vsn = data & 0x0f; - if (cccr_vsn > SDIO_CCCR_REV_1_20) { + if (cccr_vsn > SDIO_CCCR_REV_3_00) { pr_err("%s: unrecognised CCCR structure version %d\n", mmc_hostname(card->host), cccr_vsn); return -EINVAL; -- cgit