From c0c88871574ccb4ee53dde1bbb678931b38ed47b Mon Sep 17 00:00:00 2001 From: Wolfgang Muees Date: Wed, 11 Mar 2009 14:28:39 +0100 Subject: 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 Acked-by: David Brownell Signed-off-by: Pierre Ossman --- drivers/mmc/core/core.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'drivers/mmc/core') 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); -- cgit v1.2.3