Hi, Ranran <ranshalit@xxxxxxxxx> writes: > On Mon, Sep 3, 2018 at 4:50 PM Ranran <ranshalit@xxxxxxxxx> wrote: >> >> On Mon, Sep 3, 2018 at 4:22 PM Ranran <ranshalit@xxxxxxxxx> wrote: >> > >> > On Mon, Sep 3, 2018 at 3:40 PM Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx> wrote: >> > > >> > > On Mon, Sep 03, 2018 at 09:39:14AM +0300, Ranran wrote: >> > > > Hello, >> > > > >> > > > I try to add gadget configfs as described in: >> > > > https://www.kernel.org/doc/Documentation/usb/gadget_configfs.txt >> > > > Yet, I find nothing in /sys/class/udc: >> > > > >> > > > user@user-VirtualBox:~/tegra$ ls /sys/class/udc/ -al >> > > > total 0 >> > > > drwxr-xr-x 2 root root 0 Sep 3 00:30 . >> > > > drwxr-xr-x 58 root root 0 Sep 3 00:30 .. >> > > > >> > > > I also don't have dwc2, but dwc3: >> > > > user@user-VirtualBox:~/tegra$ lsmod | grep dw >> > > > dwc3 90112 0 >> > > > ulpi 16384 1 dwc3 >> > > > udc_core 24576 2 dwc3,libcomposite >> > > > user@user-VirtualBox:~/tegra$ >> > > > >> > > > Kernel is 4.4.50. >> > > >> > > Why do you think the dwc3 driver will work here? Do you really have >> > > this hardware being emulated? >> > > >> > Hi, >> > >> > I check it with Intel's E3900. >> > In datasheet, I can't find it being described in details in datasheet, >> > yet being linked with another document ("see Section Little-Endian and >> > Big-Endian in the DWC SuperSpeed USB 3.0 Controller User Guide" ) >> > https://www.mouser.com/ds/2/612/atom-e3800-family-datasheet-915661.pdf >> > I have installed module dwc3 and also dwc2 (both compiled as modules), >> > but nothing appear in /sys/class/udc >> > I also tried to add all options in device-drivers->usb->usb >> > gadget->usb peripheral control into kernel, (not as modules, but built >> > into kernel). >> > Yet, on checking >> > ls /sys/class/udc >> > I only find dummy_udc.0 , and nothing else. >> > >> >> I suspect that there is no device controller supported with this com >> express (congatec type 10), probably this is the only explanations for >> the empty /sys/class/udc. >> > > A fix for my last comment: > usb device controller should be supported with conga-MA5 (contains > Intel's appolo lake), so I am still not sure why I find /sys/class/udc > empty. > In congatec MA-5 document it is said: > "The conga-MA5 offers six USB 2.0 interfaces on the COM Express > connector including one USB 2.0 Dual Role port. The xHCI host > controller in the SoC complies with USB standard 1.1 and 2.0 with > high-speed, full-speed and low-speed USB signalling. Note USB Dual > Role is only supported under Linux. The port is a standard USB Host > port under Windows." > Maybe some configuration in my .config is missing ? (I enabled all > controllers in device-drivers->usb->usb-> gadget->usb peripheral > control , so I am not sure what is still missing) do you have the PCI device enabled? what do you get with lspci -nnnn ? -- balbi
