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atmel_sdhci: Force card-detect if MMC_CAP_NONREMOVABLE.

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If the device attached to the MMC bus is not removable, set force card-detect
bit to bypass card detection procedure, so card detection pin can be used for
other purposes.

It's also a workaround for SAMA5D2 who doesn't drive CMD if using GPIO for card
detection.

Signed-off-by: Zixun LI <zli@ogga.fr>
Reviewed-by: Eugen Hristev <eugen.hristev@collabora.com>
This commit is contained in:
Zixun LI 2023-05-17 15:49:45 +02:00 committed by Eugen Hristev
parent f5b9587449
commit e83b6f99fc
1 changed files with 37 additions and 2 deletions
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39
drivers/mmc/atmel_sdhci.c
View file

@ -15,6 +15,9 @@
#define ATMEL_SDHC_MIN_FREQ 400000
#define ATMEL_SDHC_GCK_RATE 240000000
#define ATMEL_SDHC_MC1R 0x204
#define ATMEL_SDHC_MC1R_FCD 0x80
#ifndef CONFIG_DM_MMC
int atmel_sdhci_init(void *regbase, u32 id)
{
@ -52,11 +55,37 @@ struct atmel_sdhci_plat {
struct mmc mmc;
};
static void atmel_sdhci_config_fcd(struct sdhci_host *host)
{
u8 mc1r;
/* If nonremovable, assume that the card is always present.
*
* WA: SAMA5D2 doesn't drive CMD if using CD GPIO line.
*/
if ((host->mmc->cfg->host_caps & MMC_CAP_NONREMOVABLE)
#if CONFIG_IS_ENABLED(DM_GPIO)
|| dm_gpio_get_value(&host->cd_gpio) >= 0
#endif
) {
sdhci_readb(host, ATMEL_SDHC_MC1R);
mc1r |= ATMEL_SDHC_MC1R_FCD;
sdhci_writeb(host, mc1r, ATMEL_SDHC_MC1R);
}
}
static int atmel_sdhci_deferred_probe(struct sdhci_host *host)
{
struct udevice *dev = host->mmc->dev;
int ret;
return sdhci_probe(dev);
ret = sdhci_probe(dev);
if (ret)
return ret;
atmel_sdhci_config_fcd(host);
return 0;
}
static const struct sdhci_ops atmel_sdhci_ops = {
@ -120,7 +149,13 @@ static int atmel_sdhci_probe(struct udevice *dev)
clk_free(&clk);
return sdhci_probe(dev);
ret = sdhci_probe(dev);
if (ret)
return ret;
atmel_sdhci_config_fcd(host);
return 0;
}
static int atmel_sdhci_bind(struct udevice *dev)