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sdio: add MMC_QUIRK_LENIENT_FN0

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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).

[[email protected]: code in C, not cpp!]
Signed-off-by: Ohad Ben-Cohen <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Ohad Ben-Cohen 2009-09-22 16:45:18 -07:00 • committed by Linus Torvalds
commit 7c979ec713
2 changed files with 8 additions and 1 deletions
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2
drivers/mmc/core/sdio_io.c
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@ -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;