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usb - change between device to host in runtime

ranchu
Guru 20755 points


Hello,

I understand that USB OTG is not supported in DM8148.

But, Is it possible to change between usb device mode to host mode in runtime , or do we have boot and than load different linux kernel in order for the other mode to work ?

Thank you,

Ran

  • 0
    TI__Guru**** 170625 points

    Hi Ran,

    Ran Shalit said:
    Is it possible to change between usb device mode to host mode in runtime

    I think this is exactly OTG, so this is not possible due to HW limitation.

    Regards,
    Pavel

  • 0 in reply to Pavel Botev
    Guru 20755 points

    Hi,



    We eventually did some patch in usb in order to support dynamic usb-device switch (and vice versa).

    to change to host:
    ====================
    modprobe -r g_ether
    modprobe -r usb-storage
    modprobe -r ti81xx
    modprobe ti81xx - validate printing musb-hdrc musb-hdrc.1: USB Host mode"
    modprobe usb-storage - insert disk - does it recognize the disk in /dev/sdX ?


    to change to device:
    =====================
    modprobe -r g_ether
    modprobe -r usb-storage
    modprobe -r ti81xx
    modprobe ti81xx - validate printing "musb-hdrc musb-hdrc.1: USB Peripheral mode"
    modprobe g_ether - check with ifconfig that usb0 is configured





    Regards,

    Ran