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AM437x boot from USB0

vefone
Expert 2440 points

Hi,TI

My board can boot from USB1,but not the USB0.I set the sysboot[4:0] as 11101 when boot from USB0,and I use the uboot from ti-processor-sdk-linux-am437x-evm-01.00.00.03.what the reason will be?

Thanks.

vefone

  • 0
    TI__Guru**** 393215 points

    Hi,

    USB1 boot is Host mode, used when mass storage device is attached to USB1. AM437X TRM Rev. D section 5.2.6.8 describes this boot mode.
    USB0 boot is Device mode, used when an external USB Host provides the boot files. AM437X TRM Rev. D section 5.2.7.5 describes this boot mode.

  • 0 in reply to Biser Gatchev-XID
    TI__Guru**** 393215 points
    Additionally check whether AM437X Errata Rev. B, Advisory 10 applies for your processor silicon revision.
  • 0 in reply to Biser Gatchev-XID
    Expert 2440 points
    Hi,Biser
    My processor silicon revision is 1.2.It should can boot from USB0.I read the contents that you list,and what do you mean that "when an external USB Host provides the boot filest"?

    Best Regards
    vefone
  • 0 in reply to vefone
    TI__Guru**** 393215 points
    Could you describe how you try to boot from USB0?
  • 0 in reply to Biser Gatchev-XID
    Expert 2440 points
    I think I was wrong.I follow the steps that I boot from USB1.It should be chapter three on the website:
    processors.wiki.ti.com/.../Linux_Core_U-Boot_User's_Guide
    I will try again.

    Thanks!

    Best Regards
    vefone
  • 0 in reply to Biser Gatchev-XID
    Expert 2440 points

    Hi,Biser

    When I try to boot from usb0 using my am437x board,I got some issure.I firstly modprobe rndis_host in my ubuntu pc,then I changed the sysboot[4:0] to 11101 and connected usb0 to ubuntu pc.After I power on ,I see something below:

    [17733.667359] usb 2-2.1: new full-speed USB device number 18 using uhci_hcd
    [17734.174655] usb 2-2.1: not running at top speed; connect to a high speed hub
    [17734.505731] usb 2-2.1: New USB device found, idVendor=0451, idProduct=6142
    [17734.505736] usb 2-2.1: New USB device strings: Mfr=33, Product=37, SerialNumber=0
    [17734.505739] usb 2-2.1: Product: AM43xx1.2
    [17734.505741] usb 2-2.1: Manufacturer: Texas Instruments
    [17739.873088] rndis_host 2-2.1:1.0: RNDIS init failed, -110
    [17739.873124] rndis_host: probe of 2-2.1:1.0 failed with error -110
    [17748.230480] rndis_wlan 2-2.1:1.0: RNDIS init failed, -71
    [17748.230771] rndis_wlan: probe of 2-2.1:1.0 failed with error -71

    It seems that the USB0 cannot be recognized by PC,and is there some solution  for that?

    Thanks!

    Vefone

  • 0 in reply to vefone
    TI__Mastermind 27720 points

    Vefone,

    The HW itself is correctly recognized, but there appears to be a SW issue on the RNDIS host PC. Are you certain the RNDIS driver is correctly loaded?

  • 0 in reply to -DK-
    Expert 2440 points
    -DK-,
    Yes,I sure that the RNDIS driver is correctly loaded.When I lsmod,here is the message:
    Module Size Used by
    nfnetlink_queue 20480 0
    nfnetlink_log 20480 0
    nfnetlink 16384 2 nfnetlink_log,nfnetlink_queue
    cdc_subset 16384 0
    rndis_wlan 45056 0
    cfg80211 450560 1 rndis_wlan
    rndis_host 16384 1 rndis_wlan
    cdc_ether 16384 1 rndis_host
    usbnet 40960 4 rndis_host,rndis_wlan,cdc_subset,cdc_ether

    are there any error?

    Vefone
  • 0 in reply to vefone
    TI__Guru*** 125176 points

    vefone said:
    [17739.873088] rndis_host 2-2.1:1.0: RNDIS init failed, -110
    [17739.873124] rndis_host: probe of 2-2.1:1.0 failed with error -110
    [17748.230480] rndis_wlan 2-2.1:1.0: RNDIS init failed, -71
    [17748.230771] rndis_wlan: probe of 2-2.1:1.0 failed with error -71

    The host received corrupted USB packets. It could be signal integrity problem on your board USB0.

    Please boot the board to Linux kernel using other boot source and verify if USB0 is functional in device mode. If not, please do signal integrity test on your USB0 port.