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authorRussell King <rmk@dyn-67.arm.linux.org.uk>2006-09-24 10:44:09 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2006-09-24 10:44:09 +0100
commit42431acbac43eb47c774c29d370f5c59136805bf (patch)
tree6e2a3353b4aa3f7ab179d10c287053f04c637542 /include/linux/mmc
parentdb53f28b3a6d9338cca1b7e917dc063ac99e1871 (diff)
downloadop-kernel-dev-42431acbac43eb47c774c29d370f5c59136805bf.zip
op-kernel-dev-42431acbac43eb47c774c29d370f5c59136805bf.tar.gz
[MMC] MMC_CAP_BYTEBLOCK flag for non-log2 block sizes capable hosts
Some MMC hosts can only handle log2 block sizes. Unfortunately, the MMC password support needs to be able to send non-log2 block sizes. Provide a capability so that the MMC password support can decide whether it should use this support or not. The unfortunate side effect of this host limitation is that any MMC card protected by a password which is not a log2 block size can not be accessed on a host which only allows a log2 block size. This change just adds the flag. The MMC password support code needs updating to use it (if and when it is finally submitted.) Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'include/linux/mmc')
-rw-r--r--include/linux/mmc/host.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index b282ec9..587264a 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -86,6 +86,7 @@ struct mmc_host {
#define MMC_CAP_4_BIT_DATA (1 << 0) /* Can the host do 4 bit transfers */
#define MMC_CAP_MULTIWRITE (1 << 1) /* Can accurately report bytes sent to card on error */
+#define MMC_CAP_BYTEBLOCK (1 << 2) /* Can do non-log2 block sizes */
/* host specific block data */
unsigned int max_seg_size; /* see blk_queue_max_segment_size */
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