[PATCH] sd: read-only switch

Support for the read-only switch on SD cards which must be enforced by the
host.

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>

2 files changed, 4 insertions, 0 deletions

diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h
index 538e8c86336c..0e9ec01b9c5b 100644
--- a/include/linux/mmc/card.h
+++ b/include/linux/mmc/card.h
@@ -48,6 +48,7 @@ struct mmc_card {
 #define MMC_STATE_DEAD          (1<<1)          /* device no longer in stack */
 #define MMC_STATE_BAD           (1<<2)          /* unrecognised device */
 #define MMC_STATE_SDCARD        (1<<3)          /* is an SD 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 */
         struct mmc_cid          cid;            /* card identification */
@@ -58,11 +59,13 @@ struct mmc_card {
 #define mmc_card_dead(c)        ((c)->state & MMC_STATE_DEAD)
 #define mmc_card_bad(c)         ((c)->state & MMC_STATE_BAD)
 #define mmc_card_sd(c)          ((c)->state & MMC_STATE_SDCARD)
+#define mmc_card_readonly(c)    ((c)->state & MMC_STATE_READONLY)
 
 #define mmc_card_set_present(c) ((c)->state |= MMC_STATE_PRESENT)
 #define mmc_card_set_dead(c)    ((c)->state |= MMC_STATE_DEAD)
 #define mmc_card_set_bad(c)     ((c)->state |= MMC_STATE_BAD)
 #define mmc_card_set_sd(c)      ((c)->state |= MMC_STATE_SDCARD)
+#define mmc_card_set_readonly(c) ((c)->state |= MMC_STATE_READONLY)
 
 #define mmc_card_name(c)        ((c)->cid.prod_name)
 #define mmc_card_id(c)          ((c)->dev.bus_id)
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index 845020d90c60..8c5f71376e41 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -62,6 +62,7 @@ struct mmc_ios {
 struct mmc_host_ops {
         void    (*request)(struct mmc_host *host, struct mmc_request *req);
         void    (*set_ios)(struct mmc_host *host, struct mmc_ios *ios);
+        int     (*get_ro)(struct mmc_host *host);
 };
 
 struct mmc_card;