On 23 June 2018 at 03:40, Adrian Hunter <adrian.hunter@xxxxxxxxx> wrote:
> On 06/15/2018 05:04 AM, Chunyan Zhang wrote:
>> Host Driver Version 4.10 adds a new bit in Host Control 2 Register
>> for selecting Auto CMD23 or Auto CMD12 for ADMA3 data transfer.
>
> We don't support ADMA3. It would require changes to the block driver.
> So is this change needed?
>
>>
>> Signed-off-by: Chunyan Zhang <zhang.chunyan@xxxxxxxxxx>
>> ---
>> drivers/mmc/host/sdhci.c | 16 +++++++++++++++-
>> drivers/mmc/host/sdhci.h | 1 +
>> 2 files changed, 16 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
>> index b8ee124..3b2af7e 100644
>> --- a/drivers/mmc/host/sdhci.c
>> +++ b/drivers/mmc/host/sdhci.c
>> @@ -954,6 +954,20 @@ static inline bool sdhci_auto_cmd12(struct sdhci_host *host,
>> !mrq->cap_cmd_during_tfr;
>> }
>>
>> +static inline void sdhci_set_auto_cmd23(struct sdhci_host *host,
>> + struct mmc_command *cmd)
>> +{
>> + u16 ctrl2;
>> +
>> + if (host->v4_mode) {
>
> Isn't this only for a V4.1 controller, and doesn't the mode have to be "Auto
> Cmd Auto Select"?
I will send another version of changes for this new mode "Auto Cmd
Auto Select", let's see if the next iteration gets better then.
Thanks for your review,
Chunyan
>
>
>> + ctrl2 = sdhci_readw(host, SDHCI_HOST_CONTROL2);
>> + ctrl2 |= SDHCI_CMD23_ENABLE;
>> + sdhci_writew(host, ctrl2, SDHCI_HOST_CONTROL2);
>> + } else {
>> + sdhci_writel(host, cmd->mrq->sbc->arg, SDHCI_ARGUMENT2);
>> + }
>> +}
>> +
>> static void sdhci_set_transfer_mode(struct sdhci_host *host,
>> struct mmc_command *cmd)
>> {
>> @@ -989,7 +1003,7 @@ static void sdhci_set_transfer_mode(struct sdhci_host *host,
>> mode |= SDHCI_TRNS_AUTO_CMD12;
>> else if (cmd->mrq->sbc && (host->flags & SDHCI_AUTO_CMD23)) {
>> mode |= SDHCI_TRNS_AUTO_CMD23;
>> - sdhci_writel(host, cmd->mrq->sbc->arg, SDHCI_ARGUMENT2);
>> + sdhci_set_auto_cmd23(host, cmd);
>> }
>> }
>>
>> diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
>> index 1e84539..d5e1c10 100644
>> --- a/drivers/mmc/host/sdhci.h
>> +++ b/drivers/mmc/host/sdhci.h
>> @@ -185,6 +185,7 @@
>> #define SDHCI_CTRL_DRV_TYPE_D 0x0030
>> #define SDHCI_CTRL_EXEC_TUNING 0x0040
>> #define SDHCI_CTRL_TUNED_CLK 0x0080
>> +#define SDHCI_CMD23_ENABLE 0x0800
>> #define SDHCI_CTRL_V4_MODE 0x1000
>> #define SDHCI_CTRL_64BIT_ADDR 0x2000
>> #define SDHCI_CTRL_PRESET_VAL_ENABLE 0x8000
>>
>
--
To unsubscribe from this list: send the line "unsubscribe linux-mmc" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
