I did not enable SDMA when I added sdhci-cadence support because LD20 boards are equipped with a large amount memory beyond 32 bit address range, but SDMA does not support the 64bit address. U-Boot relocates itself to the end of effectively available RAM. This would make the MMC enumeration fail because the buffer for EXT_CSD allocated in the stack would go too high, then SDMA would fail to transfer data.
Recent SDHCI-compatible controllers support ADMA, but unfortunately U-Boot does not support ADMA.
In the previous commit, I hided the DRAM area that exceeds the 32 bit address range. Now, I can enable CONFIG_MMC_SDHCI_SDMA.
Signed-off-by: Masahiro Yamada yamada.masahiro@socionext.com ---
configs/uniphier_v8_defconfig | 1 + 1 file changed, 1 insertion(+)
diff --git a/configs/uniphier_v8_defconfig b/configs/uniphier_v8_defconfig index bbcf3b0..2edc3a9 100644 --- a/configs/uniphier_v8_defconfig +++ b/configs/uniphier_v8_defconfig @@ -34,6 +34,7 @@ CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS=10 CONFIG_MMC_UNIPHIER=y CONFIG_MMC_SDHCI=y CONFIG_MMC_SDHCI_CADENCE=y +CONFIG_MMC_SDHCI_SDMA=y CONFIG_NAND=y CONFIG_NAND_DENALI_DT=y CONFIG_NAND_DENALI_SPARE_AREA_SKIP_BYTES=8