Stefan Brüns wrote: > On Freitag, 4. September 2020 14:25:37 CEST Ludwig Nussel wrote: >> Fabian Vogt wrote: >> to get rid of the otg descriptor. That's not the issue though. >> I found that when setting the hid subclass to 0 the device appears in >> u-boot. >> Still doesn't work though. It's not specific to the rpi3 either. >> Connecting a A10 olinuxino on the other side also gets no keyboard input >> either. >> Looking at "usb info" one can see that the gadget has two endpoints. One >> for input and one for output. Whereas real keyboards and also an Arduino >> pretending to be a keyboard only has an input endpoint. Could that be >> relevant? >> I couldn't find how to disable the second endpoint via configfs though. >> Any ideas? > > Although USB Keyboards all use the HID protocol, grabbing into the stack of > Keyboards I used when extending the Rpi1-3 dwc2 implementation: > > - USB low speed (1.5 MBit/s) and USB full speed (12 MBit/s) > - Control + Interupt IN is required, OUT is optional > - Devices may have one or multiple interfaces (e.g. Logitech Unifying > receivers). > > As the OTG device appears under some circumstances, physical layer problems > are unlikely. > > Does the OTG device only emulate an USB Keyboard (Class/Subclass/Protocol: > 3/1/1), or also a mouse (3/1/2)? U-Boot might be confused when a device has > interfaces with both protocols.
It's complicated indeed. Fabian pointed me at https://github.com/u-boot/u-boot/blob/9bfb567e5f1bfe7de8eb41f8c6d00f49d2b9a426/common/usb_kbd.c#L461 So u-boot doesn't even accept devices with more than one endpoint. Too bad usb_f_hid hardcodes IN and OUT. Also, u-boot requires the boot flag to be set but at the same time when the gadget has that it's not shown. So I've enabled debug in u-boot and see this: usb_control_msg() usb_control_msg: request: 0x9, requesttype: 0x0, value 0x1 index 0x0 length 0x0 usb_select_config() new device strings: Mfr=1, Product=2, SerialNumber=3 usb_control_msg() usb_control_msg: request: 0x6, requesttype: 0x80, value 0x300 index 0x0 length 0xFF usb_string() USB device number 3 default language ID 0x409 usb_control_msg() usb_control_msg: request: 0x6, requesttype: 0x80, value 0x301 index 0x409 length 0xFF usb_control_msg() usb_control_msg: request: 0x6, requesttype: 0x80, value 0x302 index 0x409 length 0xFF usb_control_msg() usb_control_msg: request: 0x6, requesttype: 0x80, value 0x303 index 0x409 length 0xFF usb_select_config() Manufacturer openSUSE usb_select_config() Product openQA usb_select_config() SerialNumber fedcba9876543210 usb_kbd_probe_dev() USB KBD: found set protocol... usb_control_msg() usb_control_msg: request: 0xB, requesttype: 0x21, value 0x0 index 0x0 length 0x0 usb_kbd_probe_dev() USB KBD: found set idle... usb_control_msg() usb_control_msg: request: 0xA, requesttype: 0x21, value 0xA00 index 0x0 length 0x0 usb_kbd_probe_dev() USB KBD: enable interrupt pipe... Timeout poll on interrupt endpoint Failed to get keyboard state from device 1d6b:0104 The gadget is this atm: # show-gadgets ID 1d6b:0104 'usbarmory' UDC fe980000.usb bcdUSB 2.00 bDeviceClass 0x00 bDeviceSubClass 0x00 bDeviceProtocol 0x00 bMaxPacketSize0 64 idVendor 0x1d6b idProduct 0x0104 bcdDevice 0.90 Language: 0x409 Manufacturer openSUSE Product openQA Serial Number fedcba9876543210 Function, type: hid instance: usb0 dev 236:0 protocol 1 report_desc 5196a115719e029e7150251751958812951758813955751581912959129517539139567581502565571902965810c0 report_length 8 subclass 1 Function, type: hid instance: usb1 dev 236:1 protocol 0 report_desc 5196a115719e029e7150251751958812951758813955751581912959129517539139567581502565571902965810c0 report_length 8 subclass 0 Configuration: 'c' ID: 1 MaxPower 250 bmAttributes 0x80 Language: 0x409 configuration foofoo hid.usb0 -> hid usb0 hid.usb1 -> hid usb1 cu Ludwig -- (o_ Ludwig Nussel //\ V_/_ http://www.suse.com/ SUSE Software Solutions Germany GmbH, GF: Felix Imendörffer HRB 36809 (AG Nürnberg) -- To unsubscribe, e-mail: opensuse-arm+unsubscr...@opensuse.org To contact the owner, e-mail: opensuse-arm+ow...@opensuse.org
