Older kernel versions cannot handle situation where either the eMMC is left in HS200/HS400 mode or SD in UHS modes by the bootloader and can misbehave. Downgrade the eMMC to HS/HS52 mode and/or SD to non-UHS mode before boot to allow such older kernels to work with modern U-Boot.
Signed-off-by: Marek Vasut marek.vasut+renesas@gmail.com Cc: Masahiro Yamada yamada.masahiro@socionext.com --- drivers/mmc/renesas-sdhi.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+)
diff --git a/drivers/mmc/renesas-sdhi.c b/drivers/mmc/renesas-sdhi.c index a556acd5cb..d78f91f937 100644 --- a/drivers/mmc/renesas-sdhi.c +++ b/drivers/mmc/renesas-sdhi.c @@ -15,6 +15,7 @@ #include <power/regulator.h> #include <asm/unaligned.h>
+#include "mmc_private.h" #include "tmio-common.h"
#if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT) || \ @@ -530,13 +531,38 @@ static int renesas_sdhi_probe(struct udevice *dev) return ret; }
+int renesas_sdhi_remove(struct udevice *dev) +{ + struct mmc *mmc = mmc_get_mmc_dev(dev); + u32 caps_filtered; + + if (!mmc->has_init) + return 0; + + if (IS_SD(mmc)) { + caps_filtered = mmc->card_caps & + ~(MMC_CAP(UHS_SDR12) | MMC_CAP(UHS_SDR25) | + MMC_CAP(UHS_SDR50) | MMC_CAP(UHS_DDR50) | + MMC_CAP(UHS_SDR104)); + + return sd_select_mode_and_width(mmc, caps_filtered); + } else { + caps_filtered = mmc->card_caps & + ~(MMC_CAP(MMC_HS_200) | MMC_CAP(MMC_HS_400)); + + return mmc_select_mode_and_width(mmc, caps_filtered); + } +} + U_BOOT_DRIVER(renesas_sdhi) = { .name = "renesas-sdhi", .id = UCLASS_MMC, .of_match = renesas_sdhi_match, .bind = tmio_sd_bind, .probe = renesas_sdhi_probe, + .remove = renesas_sdhi_remove, .priv_auto_alloc_size = sizeof(struct tmio_sd_priv), .platdata_auto_alloc_size = sizeof(struct tmio_sd_plat), .ops = &renesas_sdhi_ops, + .flags = DM_FLAG_OS_PREPARE, };