| Message ID | 1385509160-26793-1-git-send-email-bzhao@marvell.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Hi Chris, > 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. Could you please review this patch? Thanks, Bing > > Reviewed-by: Paul Stewart <pstew@chromium.org> > Reviewed-by: Doug Anderson <dianders@chromium.org> > Signed-off-by: Bing Zhao <bzhao@marvell.com> > Acked-by: Ulf Hansson <ulf.hansson@linaro.org> > --- > v2: remove mmc_fixup_broken_irq_polling() and add inline > mmc_card_broken_irq_polling(). (Ulf Hansson) > invoke the quirk handling after 'ret' value is validated. > v3: remove unnecessary include for sdio_ops.h (Ulf Hansson) > > drivers/mmc/core/quirks.c | 8 ++++++++ > drivers/mmc/core/sdio_irq.c | 11 +++++++++++ > include/linux/mmc/card.h | 8 +++++++- > 3 files changed, 26 insertions(+), 1 deletion(-) > > diff --git a/drivers/mmc/core/quirks.c b/drivers/mmc/core/quirks.c > index 06ee1ae..6c36fcc 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 > }; > > diff --git a/drivers/mmc/core/sdio_irq.c b/drivers/mmc/core/sdio_irq.c > index 3d8ceb4..417d2f0 100644 > --- a/drivers/mmc/core/sdio_irq.c > +++ b/drivers/mmc/core/sdio_irq.c > @@ -53,6 +53,17 @@ static int process_sdio_pending_irqs(struct mmc_host *host) > return ret; > } > > + if (pending && mmc_card_broken_irq_polling(card) && > + !(host->caps & MMC_CAP_SDIO_IRQ)) { > + unsigned char dummy; > + > + /* A fake interrupt could be created when we poll SDIO_CCCR_INTx > + * register with a Marvell SD8797 card. A dummy CMD52 read to > + * function 0 register 0xff can aviod this. > + */ > + mmc_io_rw_direct(card, 0, 0, 0xff, 0, &dummy); > + } > + > count = 0; > for (i = 1; i <= 7; i++) { > if (pending & (1 << i)) { > diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h > index 176fdf8..b730272 100644 > --- a/include/linux/mmc/card.h > +++ b/include/linux/mmc/card.h > @@ -271,9 +271,10 @@ struct mmc_card { > #define MMC_QUIRK_INAND_CMD38 (1<<6) /* iNAND devices have broken CMD38 */ > #define MMC_QUIRK_BLK_NO_CMD23 (1<<7) /* Avoid CMD23 for regular multiblock */ > #define MMC_QUIRK_BROKEN_BYTE_MODE_512 (1<<8) /* Avoid sending 512 bytes in */ > + /* byte mode */ > #define MMC_QUIRK_LONG_READ_TIME (1<<9) /* Data read time > CSD says */ > #define MMC_QUIRK_SEC_ERASE_TRIM_BROKEN (1<<10) /* Skip secure for erase/trim */ > - /* byte mode */ > +#define MMC_QUIRK_BROKEN_IRQ_POLLING (1<<11) /* Polling SDIO_CCCR_INTx could create a fake > interrupt */ > > unsigned int erase_size; /* erase size in sectors */ > unsigned int erase_shift; /* if erase unit is power 2 */ > @@ -505,6 +506,11 @@ static inline int mmc_card_long_read_time(const struct mmc_card *c) > return c->quirks & MMC_QUIRK_LONG_READ_TIME; > } > > +static inline int mmc_card_broken_irq_polling(const struct mmc_card *c) > +{ > + return c->quirks & MMC_QUIRK_BROKEN_IRQ_POLLING; > +} > + > #define mmc_card_name(c) ((c)->cid.prod_name) > #define mmc_card_id(c) (dev_name(&(c)->dev)) > > -- > 1.8.0 -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Hi, On Tue, Nov 26 2013, Bing Zhao wrote: > 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. > > Reviewed-by: Paul Stewart <pstew@chromium.org> > Reviewed-by: Doug Anderson <dianders@chromium.org> > Signed-off-by: Bing Zhao <bzhao@marvell.com> > Acked-by: Ulf Hansson <ulf.hansson@linaro.org> Thanks, sorry for the delay, pushed to mmc-next for 3.14. - Chris.
diff --git a/drivers/mmc/core/quirks.c b/drivers/mmc/core/quirks.c index 06ee1ae..6c36fcc 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 }; diff --git a/drivers/mmc/core/sdio_irq.c b/drivers/mmc/core/sdio_irq.c index 3d8ceb4..417d2f0 100644 --- a/drivers/mmc/core/sdio_irq.c +++ b/drivers/mmc/core/sdio_irq.c @@ -53,6 +53,17 @@ static int process_sdio_pending_irqs(struct mmc_host *host) return ret; } + if (pending && mmc_card_broken_irq_polling(card) && + !(host->caps & MMC_CAP_SDIO_IRQ)) { + unsigned char dummy; + + /* A fake interrupt could be created when we poll SDIO_CCCR_INTx + * register with a Marvell SD8797 card. A dummy CMD52 read to + * function 0 register 0xff can aviod this. + */ + mmc_io_rw_direct(card, 0, 0, 0xff, 0, &dummy); + } + count = 0; for (i = 1; i <= 7; i++) { if (pending & (1 << i)) { diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h index 176fdf8..b730272 100644 --- a/include/linux/mmc/card.h +++ b/include/linux/mmc/card.h @@ -271,9 +271,10 @@ struct mmc_card { #define MMC_QUIRK_INAND_CMD38 (1<<6) /* iNAND devices have broken CMD38 */ #define MMC_QUIRK_BLK_NO_CMD23 (1<<7) /* Avoid CMD23 for regular multiblock */ #define MMC_QUIRK_BROKEN_BYTE_MODE_512 (1<<8) /* Avoid sending 512 bytes in */ + /* byte mode */ #define MMC_QUIRK_LONG_READ_TIME (1<<9) /* Data read time > CSD says */ #define MMC_QUIRK_SEC_ERASE_TRIM_BROKEN (1<<10) /* Skip secure for erase/trim */ - /* byte mode */ +#define MMC_QUIRK_BROKEN_IRQ_POLLING (1<<11) /* Polling SDIO_CCCR_INTx could create a fake interrupt */ unsigned int erase_size; /* erase size in sectors */ unsigned int erase_shift; /* if erase unit is power 2 */ @@ -505,6 +506,11 @@ static inline int mmc_card_long_read_time(const struct mmc_card *c) return c->quirks & MMC_QUIRK_LONG_READ_TIME; } +static inline int mmc_card_broken_irq_polling(const struct mmc_card *c) +{ + return c->quirks & MMC_QUIRK_BROKEN_IRQ_POLLING; +} + #define mmc_card_name(c) ((c)->cid.prod_name) #define mmc_card_id(c) (dev_name(&(c)->dev))