AM625: AM625 HS doesn't boot using SD CARD boot UDA, but boot using AM623 GP

Alexis LOGNON

Intellectual 600 points

Part Number: AM625
Other Parts Discussed in Thread: AM623,

Hello,

We have to prototype using AM62x.

Proto A using AM623 GP

Proto B using AM625 HS-FS

When using the same Linux SDK86 boot file the SD Card boot on Proto A but doesn't boot on proto B.

Here is the message :

U-Boot SPL 2021.01-g2ee8efd654 (Dec 04 2023 - 15:21:37 +0000)
SYSFW ABI: 3.1 (firmware rev 0x0008 '8.6.4--v08.06.04 (Chill Capybar')
SPL initial stack usage: 13424 bytes
Trying to boot from MMC2
mmc fail to send stop cmd
spl_load_image_fat: error reading image tispl.bin, err - -2
SPL: failed to boot from all boot devices
### ERROR ### Please RESET the board ###

So switching to tftp boot on ethernet with the same file then proto B boot and go to u-boot prompt.

Here is the mmc info of the SD Card :

=> mmc info (Verbatim PROTO B u-boot sdk86)
Device: mmc@fa00000
Manufacturer ID: 27
OEM: 5048
Name: SD16G
Bus Speed: 200000000
Mode: UHS SDR104 (208MHz)
Rd Block Len: 512
SD version 3.0
High Capacity: Yes
Capacity: 14.4 GiB
Bus Width: 4-bit
Erase Group Size: 512 Bytes

Could you confirm that the AM623 GP and AM625 HS-FS is managing the SD Card the same way.

Could you help us to fix this critical issue?

Regards,

Alexis.

over 1 year ago

0 Anshu Madwesh over 1 year ago

TI__Mastermind 18020 points

Hello Alexis,

The boot images will be different for GP vs HS-FS devices.

Please see the SDK documentation: https://software-dl.ti.com/processor-sdk-linux/esd/AM62X/08_06_00_42/exports/docs/linux/Foundational_Components_Migration_Guide.html#processor-sdk

Also the Quick Start Guide, Section 'Booting different SK EVMs': https://dev.ti.com/tirex/explore/node?devtools=SK-AM62&node=A__AdoyIZ2jtLBUfHZNVmgFBQ__am62x-devtools__FUz-xrs__LATEST

Best Regards,

Anshu

0 Alexis LOGNON over 1 year ago in reply to Anshu Madwesh

Intellectual 600 points

Hi Anshu,

I use the good tiboot3.bin, tispl.bin and u-boot.img file.

I generate these files with SDK8.6, I use tiboot3.bin in GP version for Proto A and HS-FS for Proto B.

Could you answer to my questions, please ?

Regards,

Alexis.

+1 Hong Guan64 over 1 year ago in reply to Alexis LOGNON

TI__Guru 68290 points

Alexis LOGNON said:
Could you confirm that the AM623 GP and AM625 HS-FS is managing the SD Card the same way.

Yes, SD boot is the same for GP and HS-FS.
Have we tried a different SD card?
Best,
-Hong

0 Alexis LOGNON over 1 year ago in reply to Hong Guan64

Intellectual 600 points

Hello,

We have identified a hardware issue on our design. The design has been fix today and the test show that there is not more issue on SD card access.

Moreover I noticed that the SD bus frequency is 50MHz when booting u-boot on SD Card.

I need to unplug and plug the SD Card and make a command "mmc rescan" to make the SD Card switch to UHS SDR104 (208MHz).

Is there a way to make that automatic ?

Thanks for your help.

Regards,

Alexis

0 Hong Guan64 over 1 year ago in reply to Alexis LOGNON

TI__Guru 68290 points

One reference on "mmc dev [dev] [part] [mode]" @u-boot

mmc dev [dev] [part] [mode] - show or set current mmc device [partition] and set mode
  - the required speed mode is passed as the index from the following list
    [MMC_LEGACY, MMC_HS, SD_HS, MMC_HS_52, MMC_DDR_52, UHS_SDR12, UHS_SDR25,
    UHS_SDR50, UHS_DDR50, UHS_SDR104, MMC_HS_200, MMC_HS_400, MMC_HS_400_ES]

Best,
-Hong

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AM625: AM625 HS doesn't boot using SD CARD boot UDA, but boot using AM623 GP