From c3481955f6c78c8dd99921759306d7469c999ec2 Mon Sep 17 00:00:00 2001 From: Wei WANG Date: Fri, 8 Feb 2013 15:24:27 +0800 Subject: mfd: rtsx: Fix issue that booting OS with SD card inserted Realtek card reader supports both SD and MS card. According to the settings of rtsx MFD driver, SD host will be probed before MS host. If we boot/reboot Linux with SD card inserted, the resetting flow of SD card will succeed, and the following resetting flow of MS is sure to fail. Then MS upper-level driver will ask rtsx driver to turn power off. This request leads to the result that the following SD commands fail and SD card can't be accessed again. In this commit, Realtek's SD and MS host driver will check whether the card that upper driver requesting is the one existing in the slot. If not, Realtek's host driver will refuse the operation to make sure the exlusive accessing at the same time. Signed-off-by: Wei WANG Signed-off-by: Samuel Ortiz --- drivers/mmc/host/rtsx_pci_sdmmc.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) (limited to 'drivers/mmc/host/rtsx_pci_sdmmc.c') diff --git a/drivers/mmc/host/rtsx_pci_sdmmc.c b/drivers/mmc/host/rtsx_pci_sdmmc.c index f74b5adca642..468c92303167 100644 --- a/drivers/mmc/host/rtsx_pci_sdmmc.c +++ b/drivers/mmc/host/rtsx_pci_sdmmc.c @@ -678,12 +678,19 @@ static void sdmmc_request(struct mmc_host *mmc, struct mmc_request *mrq) struct mmc_command *cmd = mrq->cmd; struct mmc_data *data = mrq->data; unsigned int data_size = 0; + int err; if (host->eject) { cmd->error = -ENOMEDIUM; goto finish; } + err = rtsx_pci_card_exclusive_check(host->pcr, RTSX_SD_CARD); + if (err) { + cmd->error = err; + goto finish; + } + mutex_lock(&pcr->pcr_mutex); rtsx_pci_start_run(pcr); @@ -901,6 +908,9 @@ static void sdmmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) if (host->eject) return; + if (rtsx_pci_card_exclusive_check(host->pcr, RTSX_SD_CARD)) + return; + mutex_lock(&pcr->pcr_mutex); rtsx_pci_start_run(pcr); @@ -1073,6 +1083,10 @@ static int sdmmc_switch_voltage(struct mmc_host *mmc, struct mmc_ios *ios) if (host->eject) return -ENOMEDIUM; + err = rtsx_pci_card_exclusive_check(host->pcr, RTSX_SD_CARD); + if (err) + return err; + mutex_lock(&pcr->pcr_mutex); rtsx_pci_start_run(pcr); @@ -1122,6 +1136,10 @@ static int sdmmc_execute_tuning(struct mmc_host *mmc, u32 opcode) if (host->eject) return -ENOMEDIUM; + err = rtsx_pci_card_exclusive_check(host->pcr, RTSX_SD_CARD); + if (err) + return err; + mutex_lock(&pcr->pcr_mutex); rtsx_pci_start_run(pcr); -- cgit v1.2.3 From ac48653cec7dd9a5606a7057413a880d6880d5d3 Mon Sep 17 00:00:00 2001 From: Roger Tseng Date: Mon, 4 Feb 2013 15:45:57 +0800 Subject: mmc: rtsx: remove driving adjustment Several new models of readers use different way to select driving capability (a necessary adjustment along with voltage change). Removing this from device-independent rtsx_pci_sdmmc module. It will be implemented in device-depend calls encapsulated by rtsx_pci_switch_output_voltage(). Signed-off-by: Roger Tseng Reviewed-by: Wei WANG Signed-off-by: Chris Ball --- drivers/mmc/host/rtsx_pci_sdmmc.c | 5 ----- 1 file changed, 5 deletions(-) (limited to 'drivers/mmc/host/rtsx_pci_sdmmc.c') diff --git a/drivers/mmc/host/rtsx_pci_sdmmc.c b/drivers/mmc/host/rtsx_pci_sdmmc.c index f74b5adca642..f93f100e81e5 100644 --- a/drivers/mmc/host/rtsx_pci_sdmmc.c +++ b/drivers/mmc/host/rtsx_pci_sdmmc.c @@ -1083,11 +1083,6 @@ static int sdmmc_switch_voltage(struct mmc_host *mmc, struct mmc_ios *ios) voltage = OUTPUT_1V8; if (voltage == OUTPUT_1V8) { - err = rtsx_pci_write_register(pcr, - SD30_DRIVE_SEL, 0x07, DRIVER_TYPE_B); - if (err < 0) - goto out; - err = sd_wait_voltage_stable_1(host); if (err < 0) goto out; -- cgit v1.2.3