Had some progresses:
on kernel 3.17, musb controller driver is set to start as OTG mode as
default. So as first thing, since my board has ID pin shorted to ground,
i changed the default mode to MUSB_HOST., as it was on kernel 3.5.1
So with same settings of 3.5.1 now key is detected correctly at first
insertion, but after a removal, the stick is not detected anymore.
Issue seems visible in drivers/usb/musb/da8xx.c, inside irqreturn_t
da8xx_musb_interrupt() routine.
looking the /sys fs, i see that the mode moves in time order as:
|boot: vbus off b_idle||
boot: vbus off a_wait_vrise||
insertion: vbus off a_host|
removal: vbus off b_idle
After last b_host, the state never moves back to a_wait_vrise.
After the removal, the interrupt call irqreturn_t da8xx_musb_interrupt()
seems broken and seems never called anymore.
Regards.
||
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