Open HiFiPhile opened 1 year ago
Hardware: SAMA5D27 customized board, EMMC connected to SDMMC0. EMMC model Kingston EMMC08G-ML36-01B00.
Version: e05486a
On our board I met an issue where bootstrap report an error of SDHC: Error detected in status: 0x8020, 0x40, which seems to be data end bit error.
SDHC: Error detected in status: 0x8020, 0x40
However the EMMC seems working, it can be read and write by SAM-BA, also U-Boot loaded correctly.
CONFIG_CRYSTAL_24_000MHZ=y CONFIG_CPU_CLK_498MHZ=y CONFIG_CONSOLE_INDEX=0 CONFIG_DEBUG=y CONFIG_DDR_SET_BY_DEVICE=y CONFIG_DDR_AD220032D=y CONFIG_SDCARD=y # CONFIG_SDHC_8BIT_SUPPORT is not set CONFIG_LED_ON_BOARD=y CONFIG_LED_R_ON_PIOA=y CONFIG_LED_R_PIN=13 CONFIG_LED_G_ON_PIOA=y CONFIG_LED_G_PIN=11 CONFIG_LED_G_VALUE=0
AT91Bootstrap 4.0.6-rc1 (2023-04-26 14:27:58) SD/MMC: Image: Read file u-boot.bin to 0x26f00000 MMC: ADMA supported MMC: Specification Version 4.0 or higher MMC: v5.1 detected MMC: highspeed supported MMC: Dual Data Rate supported MMC: detecting buswidth... SDHC: Error detected in status: 0x8020, 0x40 MMC: 4-bit bus width detected SD/MMC: Done to load image U-Boot 2022.01-linux4sam-2022.10-00001-gc7b4dece46-dirty (Apr 27 2023 - 17:54:09 +0200) CPU: SAMA5D27 2G bits LPDDR2 SDRAM Crystal frequency: 24 MHz CPU clock : 492 MHz Master clock : 164 MHz DRAM: 256 MiB MMC: sdio-host@a0000000: 0 Loading Environment from FAT... OK In: serial@f801c000 Out: serial@f801c000 Err: serial@f801c000 Model: DUMMY Net: eth0: ethernet@f8008000
Below is the schematic, these connections are routed as impedance & length matched line, so there is a minimal chance to have signal integrity issue.
Hello, I got the same problem. Did you resolve?
No it's still exist. But looking into the code seems it's just a false warning during bus width detection.
Hardware: SAMA5D27 customized board, EMMC connected to SDMMC0. EMMC model Kingston EMMC08G-ML36-01B00.
Version: e05486a
On our board I met an issue where bootstrap report an error of
SDHC: Error detected in status: 0x8020, 0x40
, which seems to be data end bit error.However the EMMC seems working, it can be read and write by SAM-BA, also U-Boot loaded correctly.
Below is the schematic, these connections are routed as impedance & length matched line, so there is a minimal chance to have signal integrity issue.