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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>
This commit is contained in:
Vincent Yang 2015-01-20 16:05:17 +08:00 committed by Ulf Hansson
parent 67d0d04a76
commit d3fc5d71ac
2 changed files with 7 additions and 3 deletions
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8
drivers/mmc/host/sdhci.c
View File

@ -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).

2
include/linux/mmc/sdhci.h
View File

@ -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 */