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DM365 USB HOST BUT NO POWER SUPPLY FROM VBUS

hao jay
Prodigy 70 points

The kernel is already working on host mode.but I can not get power from vbus

The version of my kernel is 2.6.18

<*> Support for Host-side USB

 [*]   USB device filesystem 

 <*>   ISP116X HCD support 

 <*>   SL811HS HCD support   

 <*> Inventra Highspeed Dual Role Controller (TI, ...)

 <*> Inventra Highspeed Dual Role Controller (TI, ...)                                                        
        DaVinci 644x USB support                                                                               
        Driver Mode (USB Host)  --->                                                                           
  [*]   Disable DMA (always use PIO)  

<*> USB Mass Storage support

 [*] USB Monitor  

andi i had disabled USB Gadget Support

Is there anything wrong with my kernel??

and here

# cd /proc/driver/
# cat musb_hdrc
Status: MHDRC, Mode=Host (Power=e0, DevCtl=80)
OTG state: a_idle; inactive
Options: pio, host, debug=1 [eps=5]
Root port status: 00000100
DaVinci: ctrl=00 stat=0 phy=21c0
        rndis=00000 auto=0000 intsrc=00000000 intmsk=01ff1e1f

Is there some thing wrong?

Please help me.This problem has troubled me for a long time

Forgive my bad English

Thank you

  • 0
    TI__Genius 9460 points

    Jay,

    When you say "The kernel is already working on host mode", does it mean that you are able to connect any usb device to DM365 board and it works?.

    Your kernel config is fine. How are you measuring the Vbus and seeing that there is no Vbus ?

    Regards,
    Ajay

  • 0 in reply to Ajay
    Prodigy 70 points

    Hello Ajay

    Thanks for your reply

    It can not connect any usb device to DM365 board because the voltage of vbus is zero. The board do not supply any power to USB. I measured vbus by multimeter.

    I am sure the jumper on the board is correct . If my kernel is correct I really have no idea what is going on.

    why I can not get power from usb_vbus?

    Regards,
    jay