> > > On Mon, Dec 19, 2011 at 01:04:44PM +0100, Sebastian Andrzej Siewior
> wrote:
> > > > * Felipe Balbi | 2011-12-19 13:04:05 [+0200]:
> > > >
> > > > >--- a/include/linux/usb/gadget.h
> > > > >+++ b/include/linux/usb/gadget.h
> > > > >@@ -478,6 +478,53 @@ struct usb_gadget_ops {
> > > > > int (*stop)(struct usb_gadget_driver *);
> > > > > };
> > > > >
> > > > >+enum usb_device_status {
> > > > >+ USB_STATUS_IDLE,
> > > > >+ USB_STATUS_CONNECTED,
> > > > >+ USB_STATUS_RESETTING,
> > > > >+
> > > > >+ USB_STATUS_DEFAULT,
> > > > >+ USB_STATUS_ADDRESSED,
> > > > >+ USB_STATUS_UNCONFIGURED,
> > > > >+ USB_STATUS_CONFIGURED,
> > > > >+
> > > > >+ USB_STATUS_SUSPENDING,
> > > > >+ USB_STATUS_SUSPENDED,
> > > > >+ USB_STATUS_RESUMING,
> > > > >+ USB_STATUS_RESUMED,
> > > > >+};
> >
> > Please connect me if my understanding is wrong
>
> s/connect/correct
>
> (you were wrong ;-)
>
> > USB_STATUS_IDLE, /* default state */
>
> well, it really just means idle. It's not the default state per USB
> specification. We need a default value to use before we called our first
> usb_gadget_set_status().
>
Yes, my meaning is also it is the default value for usb_gadget_status, we
can also use this value as disconnect state (vbus is off)
> > USB_STATUS_CONNECTED, /* when get vbus rising interrupt */
>
> yes.
>
> > USB_STATUS_RESETTING, /* when receive BUS_RESET */
>
> yes.
>
> > USB_STATUS_DEFAULT, /* ??? */
>
> this is USB Specification Default state. See USB3 Spec Section 9.1.1.3.
> It means we are not addressed yet, we don't have an address.
I have not read USB3 spec, it is triggered by host setup packet or controller interrupt?
or the same with USB2 Charter 9 USB default state?
When we usually go to set it?
>
> > USB_STATUS_ADDRESSED, /* after receive SET_ADDRESS */
>
> yes.
>
> > USB_STATUS_UNCONFIGURED, /* ??? */
>
> After set_address and before set_configuration
>
> > USB_STATUS_CONFIGURED, /* after receive SET_CONFIGRUTION */
>
> yes.
>
> > USB_STATUS_SUSPENDING, /* bus idle 3ms */
> > USB_STATUS_SUSPENDED,
> > USB_STATUS_RESUMING, /* after receive resuming signal */
> > USB_STATUS_RESUMED,
> >
> > 1. when the status will be used I have marked with /* ??? */ above?
> > 2. Any differences between USB_STATUS_SUSPENDING and
> USB_STATUS_SUSPENDED?
>
> We might want to know that difference. When bus is idle for 3ms, we will
> e.g. Get a Suspend interrupt. Most drivers will use that to put PHY
> and/or Link into a lower power state and only after that whole
> operation finishes, we are truly suspended.
Get it, how about reset? does it need resetting and reseted?
>
> --
> balbi
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