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authorOhad Ben-Cohen <ohad@wizery.com>2009-09-22 16:45:18 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-09-23 07:39:37 -0700
commit7c979ec7135d96bbff34790bf4b85a8508ede7fc (patch)
tree7844a33af78db54561e2bf7d5d11d48885d3b03b
parentad1e597d4199ffcdee04b9fb402e45c5be6a5052 (diff)
sdio: add MMC_QUIRK_LENIENT_FN0
Normally writes to SDIO function 0 outside the vendor specific CCCR registers are prohibited. To support embedded devices that require writes to SDIO function 0 outside this range (e.g. TI WL127x embedded sdio wifi device), MMC_QUIRK_LENIENT_FN0 is introduced. A card quirks field is added to `struct mmc_card' to support non-standard devices (e.g. embedded sdio devices). [akpm@linux-foundation.org: code in C, not cpp!] Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com> Cc: <linux-mmc@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--drivers/mmc/core/sdio_io.c2
-rw-r--r--include/linux/mmc/card.h7
2 files changed, 8 insertions, 1 deletions
diff --git a/drivers/mmc/core/sdio_io.c b/drivers/mmc/core/sdio_io.c
index f61fc2d4cd0..f9aa8a7deff 100644
--- a/drivers/mmc/core/sdio_io.c
+++ b/drivers/mmc/core/sdio_io.c
@@ -624,7 +624,7 @@ void sdio_f0_writeb(struct sdio_func *func, unsigned char b, unsigned int addr,
BUG_ON(!func);
- if (addr < 0xF0 || addr > 0xFF) {
+ if ((addr < 0xF0 || addr > 0xFF) && (!mmc_card_lenient_fn0(func->card))) {
if (err_ret)
*err_ret = -EINVAL;
return;
diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h
index 00db39ccead..2ee22e8af11 100644
--- a/include/linux/mmc/card.h
+++ b/include/linux/mmc/card.h
@@ -97,6 +97,8 @@ struct mmc_card {
#define MMC_STATE_READONLY (1<<1) /* card is read-only */
#define MMC_STATE_HIGHSPEED (1<<2) /* card is in high speed mode */
#define MMC_STATE_BLOCKADDR (1<<3) /* card uses block-addressing */
+ unsigned int quirks; /* card quirks */
+#define MMC_QUIRK_LENIENT_FN0 (1<<0) /* allow SDIO FN0 writes outside of the VS CCCR range */
u32 raw_cid[4]; /* raw card CID */
u32 raw_csd[4]; /* raw card CSD */
@@ -132,6 +134,11 @@ struct mmc_card {
#define mmc_card_set_highspeed(c) ((c)->state |= MMC_STATE_HIGHSPEED)
#define mmc_card_set_blockaddr(c) ((c)->state |= MMC_STATE_BLOCKADDR)
+static inline int mmc_card_lenient_fn0(const struct mmc_card *c)
+{
+ return c->quirks & MMC_QUIRK_LENIENT_FN0;
+}
+
#define mmc_card_name(c) ((c)->cid.prod_name)
#define mmc_card_id(c) (dev_name(&(c)->dev))