Hi,
On 9/6/22 09:39, Kunihiko Hayashi wrote:
> This patch defines a quirk to disable the block count
> for single block transactions.
>
> This is similar to Linux kernel commit d3fc5d71ac4d
> ("mmc: sdhci: add a quirk for single block transactions").
>
> Signed-off-by: Kunihiko Hayashi <hayashi.kunih...@socionext.com>
Reviewed-by: Jaehoon Chung <jh80.ch...@samsung.com>
Best Regards,
Jaehoon Chung
> ---
> drivers/mmc/sdhci.c | 8 +++++---
> include/sdhci.h | 1 +
> 2 files changed, 6 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/mmc/sdhci.c b/drivers/mmc/sdhci.c
> index bf989a594f7e..a80ad8329a38 100644
> --- a/drivers/mmc/sdhci.c
> +++ b/drivers/mmc/sdhci.c
> @@ -211,7 +211,7 @@ static int sdhci_send_command(struct mmc *mmc, struct
> mmc_cmd *cmd,
> unsigned int stat = 0;
> int ret = 0;
> int trans_bytes = 0, is_aligned = 1;
> - u32 mask, flags, mode;
> + u32 mask, flags, mode = 0;
> unsigned int time = 0;
> int mmc_dev = mmc_get_blk_desc(mmc)->devnum;
> ulong start = get_timer(0);
> @@ -273,10 +273,12 @@ static int sdhci_send_command(struct mmc *mmc, struct
> mmc_cmd *cmd,
> /* Set Transfer mode regarding to data flag */
> if (data) {
> sdhci_writeb(host, 0xe, SDHCI_TIMEOUT_CONTROL);
> - mode = SDHCI_TRNS_BLK_CNT_EN;
> +
> + if (!(host->quirks & SDHCI_QUIRK_SUPPORT_SINGLE))
> + mode = SDHCI_TRNS_BLK_CNT_EN;
> trans_bytes = data->blocks * data->blocksize;
> if (data->blocks > 1)
> - mode |= SDHCI_TRNS_MULTI;
> + mode |= SDHCI_TRNS_MULTI | SDHCI_TRNS_BLK_CNT_EN;
>
> if (data->flags == MMC_DATA_READ)
> mode |= SDHCI_TRNS_READ;
> diff --git a/include/sdhci.h b/include/sdhci.h
> index 88f1917480b6..24b4599b857d 100644
> --- a/include/sdhci.h
> +++ b/include/sdhci.h
> @@ -247,6 +247,7 @@
> #define SDHCI_QUIRK_WAIT_SEND_CMD (1 << 6)
> #define SDHCI_QUIRK_USE_WIDE8 (1 << 8)
> #define SDHCI_QUIRK_NO_1_8_V (1 << 9)
> +#define SDHCI_QUIRK_SUPPORT_SINGLE (1 << 10)
>
> /* to make gcc happy */
> struct sdhci_host;
