Hi,
On Tue, Apr 05 2011, Ohad Ben-Cohen wrote:
> 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 <o...@wizery.com>
> ---
> Chris, I've posted this one before. Sending it again, this time with a
> follow-up patch that uses the new mmc quirks facility. thanks!
>
> drivers/mmc/core/sdio.c | 6 ++++++
> include/linux/mmc/card.h | 6 ++++++
> 2 files changed, 12 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c
> index 4221670..c3c2bd0 100644
> --- a/drivers/mmc/core/sdio.c
> +++ b/drivers/mmc/core/sdio.c
> @@ -16,6 +16,7 @@
> #include <linux/mmc/card.h>
> #include <linux/mmc/sdio.h>
> #include <linux/mmc/sdio_func.h>
> +#include <linux/mmc/sdio_ids.h>
>
> #include "core.h"
> #include "bus.h"
> @@ -31,6 +32,11 @@ static int sdio_read_fbr(struct sdio_func *func)
> int ret;
> unsigned char data;
>
> + if (mmc_card_nonstd_func_interface(func->card)) {
> + func->class = SDIO_CLASS_NONE;
> + return 0;
> + }
> +
> ret = mmc_io_rw_direct(func->card, 0, 0,
> SDIO_FBR_BASE(func->num) + SDIO_FBR_STD_IF, 0, &data);
> if (ret)
> diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h
> index adb4888..c7f1532 100644
> --- a/include/linux/mmc/card.h
> +++ b/include/linux/mmc/card.h
> @@ -125,6 +125,7 @@ struct mmc_card {
> #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 */
> @@ -180,6 +181,11 @@ static inline int mmc_blksz_for_byte_mode(const struct
> mmc_card *c)
> 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))
Thanks, pushed to mmc-next for .40.
- Chris.
--
Chris Ball <c...@laptop.org> <http://printf.net/>
One Laptop Per Child
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