[U-Boot] [PATCH] usb: ehci: remember init mode

[Marek Vasut]

On Friday, August 21, 2015 at 11:58:55 PM, Stephen Warren wrote:
> On 08/20/2015 11:34 PM, Marek Vasut wrote:
> > On Friday, August 21, 2015 at 01:38:05 AM, Stephen Warren wrote:
> >> From: Stephen Warren <swarren at nvidia.com>
> >> 
> >> When an EHCI device is registered in device mode, the HW isn't actually
> >> initialized at all, and hence isn't left in a running state.
> >> Consequently, when the device is deregistered, ehci_shutdown() will
> >> fail, since the HW bits it expects to see set in response to its
> >> shutdown requests will not be sent, and the message "EHCI failed to
> >> shut down host controller." will be printed.
> >> 
> >> Fix ehci-hcd.c to remember whether the device was registered in host or
> >> device mode, and only call ehci_shutdown() for host mode registrations.
> > 
> > Hi,
> > 
> > Shouldn't you instead check if the controller is running or not and shut
> > it down based on that ?
> 
> Why would the two states be different? How can the code check if the
> controller is running; is there some HW bit that should be checked for
> that?

Hi,

Hrm, I am not aware of any, sorry :-( But the driver can track whether the 
controller was previously inited or not, right ? I mean, this is DM, so we 
should be able to have a private data bit for that, no ?

Does it make sense to track this sort of thing in private data please ?

Best regards,
Marek Vasut