diff options
| author | Bing Zhao <bzhao@marvell.com> | 2013-11-27 03:39:20 +0400 |
|---|---|---|
| committer | Chris Ball <chris@printf.net> | 2014-01-18 07:55:01 +0400 |
| commit | e5624054c1726a16c13a89c08b2792aba3df06eb (patch) | |
| tree | 2f54f5abf6337ed1571e6dd872a2e32164382f70 /drivers/mmc/core/quirks.c | |
| parent | 2b35bd83467df6f8284b9148d6f768148c3a5e5f (diff) | |
| download | linux-e5624054c1726a16c13a89c08b2792aba3df06eb.tar.xz | |
mmc: sdio: add a quirk for broken SDIO_CCCR_INTx polling
Polling SDIO_CCCR_INTx could create a fake interrupt with Marvell
SD8797 card. Add a quirk to handle this case. The fixup here is
to issue a dummy CMD52 read to function 0 register 0xff, and this
dummy read must be right after SDIO_CCCR_INTx is read.
Patch has been verified on a dw_mmc controller (Samsung Chromebook)
with MMC_CAP_SDIO_IRQ disabled.
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Reviewed-by: Paul Stewart <pstew@chromium.org>
Reviewed-by: Doug Anderson <dianders@chromium.org>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Chris Ball <chris@printf.net>
Diffstat (limited to 'drivers/mmc/core/quirks.c')
| -rw-r--r-- | drivers/mmc/core/quirks.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/mmc/core/quirks.c b/drivers/mmc/core/quirks.c index 06ee1aeaacec..6c36fccaa1ec 100644 --- a/drivers/mmc/core/quirks.c +++ b/drivers/mmc/core/quirks.c @@ -13,6 +13,7 @@ #include <linux/kernel.h> #include <linux/export.h> #include <linux/mmc/card.h> +#include <linux/mmc/sdio_ids.h> #ifndef SDIO_VENDOR_ID_TI #define SDIO_VENDOR_ID_TI 0x0097 @@ -30,6 +31,10 @@ #define SDIO_DEVICE_ID_STE_CW1200 0x2280 #endif +#ifndef SDIO_DEVICE_ID_MARVELL_8797_F0 +#define SDIO_DEVICE_ID_MARVELL_8797_F0 0x9128 +#endif + /* * This hook just adds a quirk for all sdio devices */ @@ -58,6 +63,9 @@ static const struct mmc_fixup mmc_fixup_methods[] = { SDIO_FIXUP(SDIO_VENDOR_ID_STE, SDIO_DEVICE_ID_STE_CW1200, add_quirk, MMC_QUIRK_BROKEN_BYTE_MODE_512), + SDIO_FIXUP(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8797_F0, + add_quirk, MMC_QUIRK_BROKEN_IRQ_POLLING), + END_FIXUP }; |