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authorRussell King <rmk@dyn-67.arm.linux.org.uk>2006-01-03 17:38:44 -0500
committerRussell King <rmk+kernel@arm.linux.org.uk>2006-01-03 17:38:44 -0500
commita6f6c96b65d7f65a7a7bf5cbe874eda182a6b2cc (patch)
tree5f3bd4dc24866f2b0e593b1457b1f22ec641139b /include/linux
parent88026842b0a760145aa71d69e74fbc9ec118ca44 (diff)
[MMC] Improve MMC card block size selection
Select a block size for IO based on the read and write block size combinations, and whether the card supports partial block reads and/or partial block writes. If we are able to satisfy block reads but not block writes, mark the device read only. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/mmc/card.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h
index 18fc77f682de..7f7d40684288 100644
--- a/include/linux/mmc/card.h
+++ b/include/linux/mmc/card.h
@@ -30,7 +30,12 @@ struct mmc_csd {
30 unsigned int tacc_ns; 30 unsigned int tacc_ns;
31 unsigned int max_dtr; 31 unsigned int max_dtr;
32 unsigned int read_blkbits; 32 unsigned int read_blkbits;
33 unsigned int write_blkbits;
33 unsigned int capacity; 34 unsigned int capacity;
35 unsigned int read_partial:1,
36 read_misalign:1,
37 write_partial:1
38 write_misalign:1;
34}; 39};
35 40
36struct sd_scr { 41struct sd_scr {