diff options
| author | Sahitya Tummala <stummala@codeaurora.org> | 2016-04-01 14:29:22 +0530 |
|---|---|---|
| committer | Kyle Yan <kyan@codeaurora.org> | 2016-06-13 19:06:23 -0700 |
| commit | 021c0723abd52b19ab11efc780d7769f2381f7b4 (patch) | |
| tree | 04df56fdfb2b0159000d9675393cff5dd5cc7779 /drivers/mmc | |
| parent | e692b64f846f8ceadb26afc2f7d7e69f77778a77 (diff) | |
mmc: sdhci: add a quirk to define non standard tuning
Some controllers need SW to compare the data received
from the card for a tuning command. Add a quirk for
such non standard controllers so that they can read
the data from the controller using ADMA/PIO and do the
tuning sequence from SW to determine the appropriate phase.
Change-Id: I15edfdf0442e3ac678c70df29482b3304cf1215a
Signed-off-by: Sahitya Tummala <stummala@codeaurora.org>
[subhashj@codeaurora.org: fixed trivial merge conflicts]
Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/host/sdhci.c | 5 | ||||
| -rw-r--r-- | drivers/mmc/host/sdhci.h | 6 |
2 files changed, 9 insertions, 2 deletions
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index af24ebf0adbf..189f5969c69e 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -2898,8 +2898,9 @@ static void sdhci_data_irq(struct sdhci_host *host, u32 intmask) /* CMD19 generates _only_ Buffer Read Ready interrupt */ if (intmask & SDHCI_INT_DATA_AVAIL) { - if (command == MMC_SEND_TUNING_BLOCK || - command == MMC_SEND_TUNING_BLOCK_HS200) { + if (!(host->quirks2 & SDHCI_QUIRK2_NON_STANDARD_TUNING) && + (command == MMC_SEND_TUNING_BLOCK || + command == MMC_SEND_TUNING_BLOCK_HS200)) { host->tuning_done = 1; wake_up(&host->buf_ready_int); return; diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h index 93120f17b91e..7dcf6fe4d30d 100644 --- a/drivers/mmc/host/sdhci.h +++ b/drivers/mmc/host/sdhci.h @@ -501,6 +501,12 @@ struct sdhci_host { #define SDHCI_QUIRK2_USE_RESET_WORKAROUND (1<<26) /* Some controllers doesn't have have any LED control */ #define SDHCI_QUIRK2_BROKEN_LED_CONTROL (1<<27) +/* + * Some controllers doesn't follow the tuning procedure as defined in spec. + * The tuning data has to be compared from SW driver to validate the correct + * phase. + */ +#define SDHCI_QUIRK2_NON_STANDARD_TUNING (1 << 28) int irq; /* Device IRQ */ void __iomem *ioaddr; /* Mapped address */ |