Hi All,
OTG framework has usb_gadget_vbus_connect and usb_gadget_vbus_disconnect API
to start/stop gadget upon vbus detection. But a similar API is missing for
starting/stopping/suspending/resuming HCD. A blocking notifier is already
defined in include/linux/usb/otg.h mainly for other modules interested in
USB OTG events. But it would be good to have a simple API to achieve the
following things.
Id becomes ground --> start HCD
Id becomes float --> start HCD
HNP start --> suspend HCD
HNP complete --> resume HCD
I am proposing a new method "otg_request" in hc_driver struct defined in
linux/usb/hcd.h. This method will take 2nd argument as req_flags and 1st
argument is usb_hcd.
enum {
ID_START_HOST,
ID_STOP_HOST,
HNP_SUSPEND_HOST,
HNP_RESUME_HOST,
}
Thanks,
Pavan
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