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| author | Aries Lee <arieslee@jmicron.com> | 2010-12-15 08:14:24 +0100 |
|---|---|---|
| committer | Chris Ball <cjb@laptop.org> | 2011-01-08 23:52:09 -0500 |
| commit | 22113efd00491310da802f3b1a9a66cfcf415fac (patch) | |
| tree | 1faf6e99a591f9b6856bab6c8318eeeacb076051 /drivers/mmc/host/sdhci.c | |
| parent | e6f29a8dc1602e170daf955233891a9130573a55 (diff) | |
| download | kernel_samsung_smdk4412-22113efd00491310da802f3b1a9a66cfcf415fac.zip kernel_samsung_smdk4412-22113efd00491310da802f3b1a9a66cfcf415fac.tar.gz kernel_samsung_smdk4412-22113efd00491310da802f3b1a9a66cfcf415fac.tar.bz2 | |
mmc: Test bus-width for old MMC devices
Some old MMC devices fail with the 4/8 bits the driver tries to use
exclusively. This patch adds a test for the given bus setup and falls
back to the lower bit mode (until 1-bit mode) when the test fails.
[Major rework and refactoring by tiwai]
[Quirk addition and many fixes by prakity]
Signed-off-by: Aries Lee <arieslee@jmicron.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Philip Rakity <prakity@marvell.com>
Tested-by: Philip Rakity <prakity@marvell.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'drivers/mmc/host/sdhci.c')
| -rw-r--r-- | drivers/mmc/host/sdhci.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index 5569886..d5febe5 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -23,6 +23,7 @@ #include <linux/leds.h> +#include <linux/mmc/mmc.h> #include <linux/mmc/host.h> #include "sdhci.h" @@ -1521,7 +1522,11 @@ static void sdhci_data_irq(struct sdhci_host *host, u32 intmask) if (intmask & SDHCI_INT_DATA_TIMEOUT) host->data->error = -ETIMEDOUT; - else if (intmask & (SDHCI_INT_DATA_CRC | SDHCI_INT_DATA_END_BIT)) + else if (intmask & SDHCI_INT_DATA_END_BIT) + host->data->error = -EILSEQ; + else if ((intmask & SDHCI_INT_DATA_CRC) && + SDHCI_GET_CMD(sdhci_readw(host, SDHCI_COMMAND)) + != MMC_BUS_TEST_R) host->data->error = -EILSEQ; else if (intmask & SDHCI_INT_ADMA_ERROR) { printk(KERN_ERR "%s: ADMA error\n", mmc_hostname(host->mmc)); |