mmc: add MMC_QUIRK_NONSTD_FUNC_IF
Introduce MMC_QUIRK_NONSTD_FUNC_IF to ignore the "SDIO Standard Function
interface code" as indicated by the card's FBR, and instead treat all
functions as non-standard interfaces.
This is required to prevent standard drivers from facing
errors when trying to communicate with SDIO cards that erroneously
indicate standard function interface codes.
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h
index c4e96fa..317a002 100644
--- a/include/linux/mmc/card.h
+++ b/include/linux/mmc/card.h
@@ -128,6 +128,7 @@
#define MMC_QUIRK_NONSTD_SDIO (1<<2) /* non-standard SDIO card attached */
/* (missing CIA registers) */
#define MMC_QUIRK_BROKEN_CLK_GATING (1<<3) /* clock gating the sdio bus will make card fail */
+#define MMC_QUIRK_NONSTD_FUNC_IF (1<<4) /* SDIO card has nonstd function interfaces */
unsigned int erase_size; /* erase size in sectors */
unsigned int erase_shift; /* if erase unit is power 2 */
@@ -183,6 +184,11 @@
return c->quirks & MMC_QUIRK_BLKSZ_FOR_BYTE_MODE;
}
+static inline int mmc_card_nonstd_func_interface(const struct mmc_card *c)
+{
+ return c->quirks & MMC_QUIRK_NONSTD_FUNC_IF;
+}
+
#define mmc_card_name(c) ((c)->cid.prod_name)
#define mmc_card_id(c) (dev_name(&(c)->dev))