AM6421: U-Boot failed to write u-boot. img to emmc

jou baron

Part Number: AM6421

https://software-dl.ti.com/processor-sdk-linux-rt/esd/AM64X/08_06_00_42/exports/docs/linux/Foundational_Components/U-Boot/UG-Memory.html

I followed the steps linked above to partition the EMMC and update the firmware. Am6421 cannot start from emmc。

SDK：08.06.00.42

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=> printenv partitions 
partitions=name=rootfs,start=0,size=-,uuid=${uuid_gpt_rootfs}
=> setenv uuid_gpt_rootfs  d479a9a2-2aba-4b07-a202-02667f4392e3
=> gpt write mmc 0 ${partitions}
Writing GPT: success!
=> pr
  printenv protect
=> mmc part
Partition Map for MMC device 0  --   Partition Type: EFI
Part    Start LBA       End LBA         Name
        Attributes
        Type GUID
        Partition GUID
  1     0x00000022      0x0733bfde      "rootfs"
        attrs:  0x0000000000000000
        type:   ebd0a0a2-b9e5-4433-87c0-68b6b72699c7
        guid:   d479a9a2-2aba-4b07-a202-02667f4392e3
=> printenv partitions 
partitions=name=rootfs,start=0,size=-,uuid=${uuid_gpt_rootfs}
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

=> printenv partitions 
partitions=name=rootfs,start=0,size=-,uuid=${uuid_gpt_rootfs}
=> setenv uuid_gpt_rootfs  d479a9a2-2aba-4b07-a202-02667f4392e3
=> gpt write mmc 0 ${partitions}
Writing GPT: success!
=> pr
  printenv protect
=> mmc part

Partition Map for MMC device 0  --   Partition Type: EFI

Part    Start LBA       End LBA         Name
        Attributes
        Type GUID
        Partition GUID
  1     0x00000022      0x0733bfde      "rootfs"
        attrs:  0x0000000000000000
        type:   ebd0a0a2-b9e5-4433-87c0-68b6b72699c7
        guid:   d479a9a2-2aba-4b07-a202-02667f4392e3
=> printenv partitions 
partitions=name=rootfs,start=0,size=-,uuid=${uuid_gpt_rootfs}
=> mmc part

Partition Map for MMC device 0  --   Partition Type: EFI

Part    Start LBA       End LBA         Name
        Attributes
        Type GUID
        Partition GUID
  1     0x00000022      0x0733bfde      "rootfs"
        attrs:  0x0000000000000000
        type:   ebd0a0a2-b9e5-4433-87c0-68b6b72699c7
        guid:   d479a9a2-2aba-4b07-a202-02667f4392e3
=> mmc dev 0 1
sdhci_transfer_data: Transfer data timeout
switch to partitions #1, OK
mmc0(part 1) is current device
=> fatload mmc 1 ${loadaddr} tiboot3.bin
575199 bytes read in 26 ms (21.1 MiB/s)
=> mmc write ${loadaddr} 0x0 0x800

MMC write: dev # 0, block # 0, count 2048 ... 2048 blocks written: OK
=> fatload mmc 1 ${loadaddr} tispl.bin
901451 bytes read in 39 ms (22 MiB/s)
=> mmc write ${loadaddr} 0x800 0x1000

MMC write: dev # 0, block # 2048, count 4096 ... 4096 blocks written: OK
=> fatload mmc 1 ${loadaddr} u-boot.img
1135435 bytes read in 50 ms (21.7 MiB/s)
=> mmc write ${loadaddr} 0x1800 0x2000

MMC write: dev # 0, block # 6144, count 8192 ... MMC: block number 0x3800 exceeds max(0x2000)
0 blocks written: ERROR
=> mmc info
Device: mmc@fa10000
Manufacturer ID: 88
OEM: 103
Name: 88A19 
Bus Speed: 200000000
Mode: HS200 (200MHz)
Rd Block Len: 512
MMC version 5.1
High Capacity: Yes
Capacity: 4 MiB
Bus Width: 8-bit
Erase Group Size: 512 KiB
HC WP Group Size: 4 MiB
User Capacity: 57.6 GiB WRREL
Boot Capacity: 4 MiB ENH
RPMB Capacity: 4 MiB ENH
Boot area 0 is not write protected
Boot area 1 is not write protected
=>

Failed to write u boot. img to emmc

Where did I go wrong in my steps？

over 2 years ago

0 Suren Porwar over 2 years ago

TI__Mastermind 23355 points

Hi Jou,

Can you follow the steps to flash linux to eMMC from the AM64x Linux Academy?

https://dev.ti.com/tirex/explore/node?node=A__AJ0x6npKrLsG5-CgSKYlcw__linux_academy_am64x__7qm9DIS__LATEST

Develop Linux on TI EVM -> Flash Linux -> Flash Linux to eMMC

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# dd if=tiboot3.bin of=/dev/mmcblk0boot0 seek=0
# dd if=tispl.bin of=/dev/mmcblk0boot0 seek=1024
# dd if=u-boot.img of=/dev/mmcblk0boot0 seek=5120
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

# dd if=tiboot3.bin of=/dev/mmcblk0boot0 seek=0
# dd if=tispl.bin of=/dev/mmcblk0boot0 seek=1024
# dd if=u-boot.img of=/dev/mmcblk0boot0 seek=5120

Also, we have a newer SDK release that you can try out.

https://www.ti.com/tool/download/PROCESSOR-SDK-LINUX-AM64X

Best Regards,

Suren

0 jou baron over 2 years ago in reply to Suren Porwar

Prodigy 190 points

mmc info
Device: mmc@fa10000
Manufacturer ID: 88
OEM: 103
Name: 88A19
Bus Speed: 200000000
Mode: HS200 (200MHz)
Rd Block Len: 512
MMC version 5.1
High Capacity: Yes
Capacity: 4 MiB
Bus Width: 8-bit

The emmc boot0 has a capacity of only 4MB, And you require a boot0 capacity of 8MB。

Is there a requirement for the capacity of EMMC boot0？

0 Suren Porwar over 2 years ago in reply to jou baron

TI__Mastermind 23355 points

Hi Jou,

I have assigned your query to our expert. Please allow a day or two for a response.

Best Regards,

Suren

0 jou baron over 2 years ago in reply to Suren Porwar

Prodigy 190 points

The problem has been resolved, I have modified the storage location of tispl tiboot3 uboot in boot0

0 Judith Mendez over 2 years ago in reply to jou baron

TI__Expert 8400 points

Hi Jou,

Glad to hear the issue is resolved.

~ Judith

Processors

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AM6421: U-Boot failed to write u-boot. img to emmc