diff options
| author | Vincent Yang | 2015-01-20 16:05:17 +0800 |
|---|---|---|
| committer | Ulf Hansson | 2015-01-20 09:29:16 +0100 |
| commit | d3fc5d71ac4dfd28a66689cfd1eea84c4dba8bde (patch) | |
| tree | b37f8c1a3c4341ecc76ef7573b25d77c3cc5c7b9 | |
| parent | 67d0d04a762db4bd610fd628ad683b5d7dc905e7 (diff) | |
mmc: sdhci: add a quirk for single block transactions
This patch defines a quirk to disable the block count
for single block transactions.
It is a preparation and will be used by Fujitsu
SDHCI controller f_sdh30 driver.
Signed-off-by: Vincent Yang <Vincent.Yang@tw.fujitsu.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
| -rw-r--r-- | drivers/mmc/host/sdhci.c | 8 | ||||
| -rw-r--r-- | include/linux/mmc/sdhci.h | 2 |
2 files changed, 7 insertions, 3 deletions
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index a3ecd20e5510..c9881ca131d5 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -904,7 +904,7 @@ static void sdhci_prepare_data(struct sdhci_host *host, struct mmc_command *cmd) static void sdhci_set_transfer_mode(struct sdhci_host *host, struct mmc_command *cmd) { - u16 mode; + u16 mode = 0; struct mmc_data *data = cmd->data; if (data == NULL) { @@ -922,9 +922,11 @@ static void sdhci_set_transfer_mode(struct sdhci_host *host, WARN_ON(!host->data); - mode = SDHCI_TRNS_BLK_CNT_EN; + if (!(host->quirks2 & SDHCI_QUIRK2_SUPPORT_SINGLE)) + mode = SDHCI_TRNS_BLK_CNT_EN; + if (mmc_op_multi(cmd->opcode) || data->blocks > 1) { - mode |= SDHCI_TRNS_MULTI; + mode = SDHCI_TRNS_BLK_CNT_EN | SDHCI_TRNS_MULTI; /* * If we are sending CMD23, CMD12 never gets sent * on successful completion (so no Auto-CMD12). diff --git a/include/linux/mmc/sdhci.h b/include/linux/mmc/sdhci.h index 933b897ca095..c3e3db196738 100644 --- a/include/linux/mmc/sdhci.h +++ b/include/linux/mmc/sdhci.h @@ -113,6 +113,8 @@ struct sdhci_host { #define SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400 (1<<11) /* forced tuned clock */ #define SDHCI_QUIRK2_TUNING_WORK_AROUND (1<<12) +/* disable the block count for single block transactions */ +#define SDHCI_QUIRK2_SUPPORT_SINGLE (1<<13) int irq; /* Device IRQ */ void __iomem *ioaddr; /* Mapped address */ |