Thread: N900 will not allow USB OTG!
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javispedro is offline javispedro
2010-05-07 , 00:07
Posts: 2,355 | Thanked: 5,249 times | Joined on Jan 2009 @ Barcelona
#757
After booting N900, cat /proc/interrupts | grep usb:
Code:
 92:          0        INTC  musb_hdrc
 93:          0        INTC  musb_hdrc
378:          5     twl4030  twl4030_usb
Plug into powered hub, as a gadget:
Code:
 92:          1        INTC  musb_hdrc
 93:          0        INTC  musb_hdrc
378:          6     twl4030  twl4030_usb
Plug into self-powered hub, as a host: no new interrupts.

Even though you can hack around musb until you really convince it that it should be in host mode
Code:
Status: MHDRC, Mode=Host (Power=e1, DevCtl=82)
OTG state: a_idle; inactive
I get no debug output from it when plugged into a selfpowered hub via female-female adaptor, and seemingly no interrupts.

Also, I tried to build non-otg, only host mode kernel, but fails to boot (wild guess: tries to insert gadget modules during early start).
 

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