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| author | Pierre Ossman <drzeus@drzeus.cx> | 2008-07-29 02:11:16 +0400 |
|---|---|---|
| committer | Pierre Ossman <drzeus@drzeus.cx> | 2008-08-01 21:03:35 +0400 |
| commit | 4a3cba32cb514168bb2516c045b178e6660421d1 (patch) | |
| tree | 2722540273e51cae20f80e85b9c275960ceb39b3 /drivers/mmc/host/sdhci.c | |
| parent | 94ad374a0751f40d25e22e036c37f7263569d24c (diff) | |
| download | linux-4a3cba32cb514168bb2516c045b178e6660421d1.tar.xz | |
sdhci: handle bug in JMB38x for sizes < 4 bytes
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Diffstat (limited to 'drivers/mmc/host/sdhci.c')
| -rw-r--r-- | drivers/mmc/host/sdhci.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index 5f95e10229b5..be09739f692d 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -278,6 +278,15 @@ static void sdhci_transfer_pio(struct sdhci_host *host) else mask = SDHCI_SPACE_AVAILABLE; + /* + * Some controllers (JMicron JMB38x) mess up the buffer bits + * for transfers < 4 bytes. As long as it is just one block, + * we can ignore the bits. + */ + if ((host->quirks & SDHCI_QUIRK_BROKEN_SMALL_PIO) && + (host->data->blocks == 1)) + mask = ~0; + while (readl(host->ioaddr + SDHCI_PRESENT_STATE) & mask) { if (host->data->flags & MMC_DATA_READ) sdhci_read_block_pio(host); |