Commit 7c979ec7 authored by Ohad Ben-Cohen's avatar Ohad Ben-Cohen Committed by Linus Torvalds
Browse files

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: default avatarOhad Ben-Cohen <ohad@wizery.com>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent ad1e597d

drivers/mmc/core/sdio_io.c

+1 −1
Original line number Diff line number Diff line
@@ -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;

include/linux/mmc/card.h

+7 −0
Original line number Diff line number Diff line
@@ -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))

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