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mmc: sdhci: Add HS400 Enhanced Strobe support

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Delegate setting the Enhanced Strobe configuration to individual drivers
if they set a function for it. Return -ENOTSUPP if they do not, like
what the MMC uclass does.

Signed-off-by: Alper Nebi Yasak <alpernebiyasak@gmail.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
This commit is contained in:
Alper Nebi Yasak 2022-03-15 20:46:26 +03:00 committed by Jaehoon Chung
parent 0f3466f52f
commit 2a1d7c635f
2 changed files with 30 additions and 0 deletions
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18
drivers/mmc/sdhci.c
View File

@ -513,6 +513,7 @@ void sdhci_set_uhs_timing(struct sdhci_host *host)
reg |= SDHCI_CTRL_UHS_SDR104;
break;
case MMC_HS_400:
case MMC_HS_400_ES:
reg |= SDHCI_CTRL_HS400;
break;
default:
@ -666,6 +667,7 @@ static int sdhci_set_ios(struct mmc *mmc)
mmc->selected_mode == MMC_DDR_52 ||
mmc->selected_mode == MMC_HS_200 ||
mmc->selected_mode == MMC_HS_400 ||
mmc->selected_mode == MMC_HS_400_ES ||
mmc->selected_mode == UHS_SDR25 ||
mmc->selected_mode == UHS_SDR50 ||
mmc->selected_mode == UHS_SDR104 ||
@ -799,6 +801,19 @@ static int sdhci_wait_dat0(struct udevice *dev, int state,
return -ETIMEDOUT;
}
#if CONFIG_IS_ENABLED(MMC_HS400_ES_SUPPORT)
static int sdhci_set_enhanced_strobe(struct udevice *dev)
{
struct mmc *mmc = mmc_get_mmc_dev(dev);
struct sdhci_host *host = mmc->priv;
if (host->ops && host->ops->set_enhanced_strobe)
return host->ops->set_enhanced_strobe(host);
return -ENOTSUPP;
}
#endif
const struct dm_mmc_ops sdhci_ops = {
.send_cmd = sdhci_send_command,
.set_ios = sdhci_set_ios,
@ -808,6 +823,9 @@ const struct dm_mmc_ops sdhci_ops = {
.execute_tuning = sdhci_execute_tuning,
#endif
.wait_dat0 = sdhci_wait_dat0,
#if CONFIG_IS_ENABLED(MMC_HS400_ES_SUPPORT)
.set_enhanced_strobe = sdhci_set_enhanced_strobe,
#endif
};
#else
static const struct mmc_ops sdhci_ops = {

12
include/sdhci.h
View File

@ -272,6 +272,18 @@ struct sdhci_ops {
int (*platform_execute_tuning)(struct mmc *host, u8 opcode);
int (*set_delay)(struct sdhci_host *host);
int (*deferred_probe)(struct sdhci_host *host);
/**
* set_enhanced_strobe() - Set HS400 Enhanced Strobe config
*
* This is called after setting the card speed and mode to
* HS400 ES, and should set any host-specific configuration
* necessary for it.
*
* @host: SDHCI host structure
* Return: 0 if successful, -ve on error
*/
int (*set_enhanced_strobe)(struct sdhci_host *host);
};
#define ADMA_MAX_LEN 65532