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authorPierre Ossman <drzeus@drzeus.cx>2007-02-18 12:07:47 +0100
committerPierre Ossman <drzeus@drzeus.cx>2007-03-06 13:26:55 +0100
commitcd9277c011a99769fa371521b460ed57f6d280b1 (patch)
tree8ae2566bf8c9dac5a01a7f4f04457596ca42465a /include
parentc5f93cf19df633a8dbd7adf8130d604eec96e145 (diff)
mmc: require explicit support for high-speed
The new high-speed timings are similar to each other and the old system, but not identical. And although things "just work" most of the time, sometimes it does not. So we need to start marking which hosts are known to fully comply with the new timings. Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Diffstat (limited to 'include')
-rw-r--r--include/linux/mmc/host.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index 913e5752569..bfcef8a1ad8 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -62,6 +62,12 @@ struct mmc_ios {
#define MMC_BUS_WIDTH_1 0
#define MMC_BUS_WIDTH_4 2
+
+ unsigned char timing; /* timing specification used */
+
+#define MMC_TIMING_LEGACY 0
+#define MMC_TIMING_MMC_HS 1
+#define MMC_TIMING_SD_HS 2
};
struct mmc_host_ops {
@@ -87,6 +93,8 @@ 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 */
+#define MMC_CAP_MMC_HIGHSPEED (1 << 3) /* Can do MMC high-speed timing */
+#define MMC_CAP_SD_HIGHSPEED (1 << 4) /* Can do SD high-speed timing */
/* host specific block data */
unsigned int max_seg_size; /* see blk_queue_max_segment_size */