Linux/AM5728: Unable to flash eMMC using DFU

Wilson Perez

Part Number: AM5728

Tool/software: Linux

We are attempting to flash the eMMC of our am5728-based board using USB peripheral boot mode from an Ubuntu host PC. We are using U-boot 2016.05.

1) How can u-boot be configured so that more DFU capable devices are available when executing dfu-util -l (please see step 2 below)?
2) What should be done after u-boot.img is downloaded and the target console responds with "Ctrl+C to exit ..." (please see step 3 below)? Pressing Ctrl+C does nothing.
3) Can the message "Invalid DFU suffix signature" be ignored (please see step 3 below)?
4) Can MLO and u-boot.img be written directly to eMMC via dfu-util?

Below is the sequence of events:

###################################
1)
[Ubuntu PC]
usbboot -S u-boot-spl.bin

reading ASIC ID
CHIP: 5641
rom minor version: 02
IDEN: 0000000000000000000000000000000000000000
MPKH: 0000000000000000000000000000000000000000000000000000000000000000
CRC0: 51d2f9a7
CRC1: 00000000
device is GP
sending 2ndstage to target...

[Target Console]
U-Boot SPL 2016.05-00304-g323bf10-dirty (Apr 12 2017 - 11:57:56)

DRA752-GP ES1.1
Trying to boot from USB DFU
Using default environment

2)
[Ubuntu PC]
dfu-util -l

dfu-util 0.8

Copyright 2005-2009 Weston Schmidt, Harald Welte and OpenMoko Inc.
Copyright 2010-2014 Tormod Volden and Stefan Schmidt
This program is Free Software and has ABSOLUTELY NO WARRANTY
Please report bugs to dfu-util@lists.gnumonks.org

Found DFU: [0451:d022] ver=0223, devnum=121, cfg=1, intf=0, alt=2, name="ramdisk", serial="UNKNOWN"
Found DFU: [0451:d022] ver=0223, devnum=121, cfg=1, intf=0, alt=1, name="fdt", serial="UNKNOWN"
Found DFU: [0451:d022] ver=0223, devnum=121, cfg=1, intf=0, alt=0, name="kernel", serial="UNKNOWN"

3)
[Ubuntu PC]
dfu-util c 1 -i 0 -a 0 -D "u-boot.img"

dfu-util 0.8

dfu-util: Invalid DFU suffix signature
dfu-util: A valid DFU suffix will be required in a future dfu-util release!!!
Opening DFU capable USB device...
ID 0451:d022
Run-time device DFU version 0110
Claiming USB DFU Interface...
Setting Alternate Setting #0 ...
Determining device status: state = dfuIDLE, status = 0
dfuIDLE, continuing
DFU mode device DFU version 0110
Device returned transfer size 4096
Copying data from PC to DFU device
Download [=========================] 100% 315120 bytes
Download done.
state(7) = dfuMANIFEST, status(0) = No error condition is present
state(2) = dfuIDLE, status(0) = No error condition is present
Done!

[Target Console]
#####DOWNLOAD ... OK
Ctrl+C to exit ...

###################################

Thanks!

over 8 years ago

0 Biser Gatchev-XID over 8 years ago

TI__Guru**** 393215 points

Hi,

Have you seen processors.wiki.ti.com/.../Linux_Core_U-Boot_User's_Guide

0 Wilson Perez over 8 years ago in reply to Biser Gatchev-XID

Intellectual 355 points

Thanks, Biser, we have seen "Updating an SD card or eMMC using DFU".

We are trying to boot using USB peripheral boot mode and then programming the eMMC. After downloading u-boot.img the target console displays:
#####DOWNLOAD ... OK
Ctrl+C to exit ...
but it does not execute the bootloader or responds to keyboard input.

0 Biser Gatchev-XID over 8 years ago in reply to Wilson Perez

TI__Guru**** 393215 points

I have asked the software team to look at this. They will respond here.

0 Wilson Perez over 8 years ago in reply to Biser Gatchev-XID

Intellectual 355 points

Biser,

Defining DEBUG, we see that the last function that gets executed is:
image_entry((u32 *)boot_params);
from arch\arm\cpu\armv7\omap-common\boot-common.c::jump_to_image_no_args

Below is a condensed console output :

reset_config:
unbind function 'dfu'/80a80008
g_dnl_unbind: calling usb_gadget_disconnect for controller 'dwc3-gadget'
0
0
request 80a9a380 from ep0out completed 0/0 ===> -108
composite_setup_complete: setup complete --> -108, 0/0
unregistering gadget
Disable clock module - 4a0093e0
Disable clock module - 4a0093f0
Legacy image
mkimage signature not found - ih_magic = aaaaaaaa
Jumping to U-Boot
loaded - jumping to U-Boot...image entry point: 0x80800000
OMAP_SRAM_SCRATCH_BOOT_PARAMS: 0x4037DC24 << Added debug statement

Any ideas?

0 Biser Gatchev-XID over 8 years ago in reply to Wilson Perez

TI__Guru**** 393215 points

Sorry about this delay. I have escalated the support request.

0 Wilson Perez over 8 years ago in reply to Biser Gatchev-XID

Intellectual 355 points

Hello, Biser.

We are still unable to perform the USB peripheral boot to ultimately program an eMMC in an AM5728-based production system. We are using the latest PROCESSOR-SDK-LINUX-AM57X 03_03_00_04.

We have enabled CONFIG_SPL_DFU_SUPPORT and CONFIG_SPL_DFU_RAM and tried both disabling and enabling CONFIG_HUSH_PARSER per the Linux Core U-Boot User's Guide found here:
processors.wiki.ti.com/.../Linux_Core_U-Boot_User's_Guide

Could someone at TI please confirm required steps and that you are able to perform a successfully boot to u-boot prompt on an AM5728-based system using the USB peripheral boot?

Thanks!

Wilson

0 Biser Gatchev-XID over 8 years ago in reply to Wilson Perez

TI__Guru**** 393215 points

Sorry for the delay. The people who were assigned this have been travelling on business last 2 weeks. I have sent a new notification.

0 Wilson Perez over 8 years ago in reply to Biser Gatchev-XID

Intellectual 355 points

Thank you, Biser.

Something probably worth noting is that the generated MLO and u-boot.img images work just fine when copying them directly onto the eMMC of development boards that have both eMMC and a removable micro-sd card and that were initially configured by means of a bootable micro-sd card - unfortunately, our production boards do not have a micro-sd card.

USB peripheral boot requires u-boot-spl.bin which is the MLO without header information, and u-boot.img, correct?

Thanks.

0 Bin Liu over 8 years ago

TI__Guru**** 168421 points

Wilson Perez said:
1) How can u-boot be configured so that more DFU capable devices are available when executing dfu-util -l (please see step 2 below)?

uboot doesn't require any specific config in this case, you just need to connect multiple boards to the host, then running 'sudo usbboot -S u-boot-spl.bin' multiple times will put all the boards into spl dfu mode, 'dfu-util -l' will list them all. However, the dfu-util I have is version 0.5, which doesn't support multiple dfu capable devices at the same time, I am not sure if newer version supports it.

Wilson Perez said:
2) What should be done after u-boot.img is downloaded and the target console responds with "Ctrl+C to exit ..." (please see step 3 below)? Pressing Ctrl+C does nothing.

It seems you missed '-R' in host dfu-util command line, which will reset the board after the download, then you don't have to do 'Ctrl-C'.

Wilson Perez said:
3) Can the message "Invalid DFU suffix signature" be ignored (please see step 3 below)?

It seems can be ignored. I have this message too, but dfu runs fine.

Wilson Perez said:
4) Can MLO and u-boot.img be written directly to eMMC via dfu-util?

I think so, please check http://processors.wiki.ti.com/index.php/Linux_Core_U-Boot_User%27s_Guide#Updating_an_SD_card_or_eMMC_using_DFU.

0 Wilson Perez over 8 years ago in reply to Bin Liu

Intellectual 355 points

We were finally able to boot to a u-boot prompt using the USB peripheral mode by combining board/configuration specifics from the am57xx and dra7xx boards.

We are now attempting to partition the eMMC and copy the required u-boot, linux kernel, and root files system files.

0 Bin Liu over 8 years ago in reply to Wilson Perez

TI__Guru**** 168421 points

Great! Thanks for the update.

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Linux/AM5728: Unable to flash eMMC using DFU