diff options
| author | Wolfgang Muees <wolfgang.mues@auerswald.de> | 2009-03-11 14:28:39 +0100 |
|---|---|---|
| committer | Pierre Ossman <drzeus@drzeus.cx> | 2009-03-24 21:30:02 +0100 |
| commit | c0c88871574ccb4ee53dde1bbb678931b38ed47b (patch) | |
| tree | 5b820a07f99534f36867bc7ae1b01e427dcf086a /drivers/mmc | |
| parent | ea15ba5cd7bb370902cd9f6a73c2d288bfba6b2c (diff) | |
| download | blackbird-op-linux-c0c88871574ccb4ee53dde1bbb678931b38ed47b.tar.gz blackbird-op-linux-c0c88871574ccb4ee53dde1bbb678931b38ed47b.zip | |
mmc_spi: allow higher timeouts for SPI mode
Some SD cards have very high timeouts in SPI mode.
So adjust the timeouts from theory to practice.
Signed-off-by: Wolfgang Muees <wolfgang.mues@auerswald.de>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/core/core.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c index 4a18d90556d9..5c83c67b186c 100644 --- a/drivers/mmc/core/core.c +++ b/drivers/mmc/core/core.c @@ -297,6 +297,21 @@ void mmc_set_data_timeout(struct mmc_data *data, const struct mmc_card *card) data->timeout_clks = 0; } } + /* + * Some cards need very high timeouts if driven in SPI mode. + * The worst observed timeout was 900ms after writing a + * continuous stream of data until the internal logic + * overflowed. + */ + if (mmc_host_is_spi(card->host)) { + if (data->flags & MMC_DATA_WRITE) { + if (data->timeout_ns < 1000000000) + data->timeout_ns = 1000000000; /* 1s */ + } else { + if (data->timeout_ns < 100000000) + data->timeout_ns = 100000000; /* 100ms */ + } + } } EXPORT_SYMBOL(mmc_set_data_timeout); |
