Hi Joseph, Interesting mix of top and bottom post. On Tue, Feb 10, 2015 at 10:07:04AM -0700, Joseph Kogut wrote: > > Why they use uAB connector I can only assume is because of the smaller > > size then standard-A, and because they are not interested in standards. > > > That actually sounds remarkably characteristic of Microsoft. > > > So 0f35 is indeed is the xHCI host controller. Baytrail boards that > > have the device controller have second USB controller with device id > > 0f37. > > > Any idea if the device controller is wholly absent, or simply not > connected/enumerated? The controller is part of the BYT SoC, but it's not enumerated and probably not connected too. I assume a phy is missing too (which is not part of SoC). Better to consider as Heikki pointed out: if you don't see the id 0f37, you can't use it. Br, David > > On Tue, Feb 10, 2015 at 1:39 AM, Heikki Krogerus > <heikki.krogerus@xxxxxxxxxxxxxxx> wrote: > > Hi Joseph, > > > > On Mon, Feb 09, 2015 at 10:27:53AM -0600, Felipe Balbi wrote: > >> On Sun, Feb 08, 2015 at 02:51:16PM -0700, Joseph Kogut wrote: > >> > I have an Intel Valleyview/Baytrail based device (specifically a Dell > >> > Venue 8 Pro 5830) that I'd like to be able to use the Linux Gadget > >> > subsystem on, but it seems that the controller isn't currently > >> > supported. I'm running the 3.19rc7 mainline release. > >> > > >> > The device has a micro AB connector. Based on my experiences with a > >> > similar (Merrifield) platform using Intel's own out of tree patchset > >> > that had working DRD support using a modified DWC3 driver, I suspected > >> > that the Baytrail platform I'm working on would also use the DWC3 > >> > driver. > > > > Unfortunately Dell Venue 8 Pro 5000 Series tablets do not have USB > > device controller. You only have the xHCI host controller. In fact, > > this is the case with basically all new Windows tablets. Microsoft is > > simply not interested in USB device mode. > > > > Why they use uAB connector I can only assume is because of the smaller > > size then standard-A, and because they are not interested in standards. > > > >> > The output of "lspci -nn" shows: > >> > > >> > > 00:14.0 USB controller [0c03]: Intel Corporation Atom Processor > >> > > Z36xxx/Z37xxx Series USB xHCI [8086:0f35] (rev 09) > > > > So 0f35 is indeed is the xHCI host controller. Baytrail boards that > > have the device controller have second USB controller with device id > > 0f37. > > > > > > Br, > > > > -- > > heikki -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
