[PATCH] sd: SCR register

Read the SD specific SCR register from the card.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 9 insertions, 0 deletions

diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h
index 0e9ec01b9c5b..18fc77f682de 100644
--- a/include/linux/mmc/card.h
+++ b/include/linux/mmc/card.h
@@ -33,6 +33,13 @@ struct mmc_csd {
         unsigned int            capacity;
 };
 
+struct sd_scr {
+        unsigned char           sda_vsn;
+        unsigned char           bus_widths;
+#define SD_SCR_BUS_WIDTH_1      (1<<0)
+#define SD_SCR_BUS_WIDTH_4      (1<<2)
+};
+
 struct mmc_host;
 
 /*
@@ -51,8 +58,10 @@ struct mmc_card {
 #define MMC_STATE_READONLY      (1<<4)          /* card is read-only */
         u32                     raw_cid[4];     /* raw card CID */
         u32                     raw_csd[4];     /* raw card CSD */
+        u32                     raw_scr[2];     /* raw card SCR */
         struct mmc_cid          cid;            /* card identification */
         struct mmc_csd          csd;            /* card specific */
+        struct sd_scr           scr;            /* extra SD information */
 };
 
 #define mmc_card_present(c)     ((c)->state & MMC_STATE_PRESENT)