On Monday 22 June 2020 16:19:19 haibo.chen@xxxxxxx wrote:
> From: Haibo Chen <haibo.chen@xxxxxxx>
>
> In current code logic, when work in SDR12/SDR25 mode, the final clock
> rate is incorrect, just the legancy 400KHz, because the
> card->sw_caps.sd3_bus_mode do not has the flag SD_MODE_UHS_SDR12 or
> SD_MODE_UHS_SDR25. Besides, SDIO_SPEED_SDR12 is actually value 0, and
> every mode need to config the timing and clock rate, so remove the
> ‘if’ operator.
>
> Signed-off-by: Haibo Chen <haibo.chen@xxxxxxx>
Hello! I do not know what should be the correct behavior according to
sdio standards, but I tested this patch with DDR50 card and behavior of
that card was not changed, it is working as before.
Tested-by: Pali Rohár <pali@xxxxxxxxxx>
> ---
> drivers/mmc/core/sdio.c | 15 ++++++++-------
> 1 file changed, 8 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c
> index 0e32ca7b9488..7b40553d3934 100644
> --- a/drivers/mmc/core/sdio.c
> +++ b/drivers/mmc/core/sdio.c
> @@ -176,15 +176,18 @@ static int sdio_read_cccr(struct mmc_card *card, u32 ocr)
> if (mmc_host_uhs(card->host)) {
> if (data & SDIO_UHS_DDR50)
> card->sw_caps.sd3_bus_mode
> - |= SD_MODE_UHS_DDR50;
> + |= SD_MODE_UHS_DDR50 | SD_MODE_UHS_SDR50
> + | SD_MODE_UHS_SDR25 | SD_MODE_UHS_SDR12;
>
> if (data & SDIO_UHS_SDR50)
> card->sw_caps.sd3_bus_mode
> - |= SD_MODE_UHS_SDR50;
> + |= SD_MODE_UHS_SDR50 | SD_MODE_UHS_SDR25
> + | SD_MODE_UHS_SDR12;
>
> if (data & SDIO_UHS_SDR104)
> card->sw_caps.sd3_bus_mode
> - |= SD_MODE_UHS_SDR104;
> + |= SD_MODE_UHS_SDR104 | SD_MODE_UHS_SDR50
> + | SD_MODE_UHS_SDR25 | SD_MODE_UHS_SDR12;
> }
>
> ret = mmc_io_rw_direct(card, 0, 0,
> @@ -537,10 +540,8 @@ static int sdio_set_bus_speed_mode(struct mmc_card *card)
> max_rate = min_not_zero(card->quirk_max_rate,
> card->sw_caps.uhs_max_dtr);
>
> - if (bus_speed) {
> - mmc_set_timing(card->host, timing);
> - mmc_set_clock(card->host, max_rate);
> - }
> + mmc_set_timing(card->host, timing);
> + mmc_set_clock(card->host, max_rate);
>
> return 0;
> }
> --
> 2.17.1
>
