Re: [PATCH] HID: hid-lg: Add USBID for Logitech G29 Wheel

From: Simon Wood
Date: Mon Sep 28 2015 - 16:03:15 EST

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> I was able to get some more information, but as yet have not been able to
> get time on the real hardware. Attached is a 2nd patch which should
> improve the support, I'll formally submit it next week.... But if anyone
> can test it first that would be great.

Obviously the 'submit next week' never happened... but I now have one of
these wheels to work on. The bad news is that the information we got does
not appear to be complete.

At present the wheel is mis-recognised as a G27 and forced into an
emulation state, it is somewhat usable in that mode.

If we send the 'G29 mode' command the wheel comes back with a device with
2x HID interfaces and that appears to screw up the probe (full log
attached).
--
Sep 28 12:30:33 retrobox kernel: [11079.944056] usb 2-1: new full-speed
USB device number 3 using uhci_hcd
Sep 28 12:30:33 retrobox kernel: [11080.113102] usb 2-1: New USB device
found, idVendor=046d, idProduct=c24f
Sep 28 12:30:33 retrobox kernel: [11080.113113] usb 2-1: New USB device
strings: Mfr=1, Product=2, SerialNumber=0
Sep 28 12:30:33 retrobox kernel: [11080.113120] usb 2-1: Product: G29
Driving Force Racing Wheel
Sep 28 12:30:33 retrobox kernel: [11080.113125] usb 2-1: Manufacturer:
Logitech
Sep 28 12:30:33 retrobox kernel: [11080.124431] input: Logitech G29
Driving Force Racing Wheel as
/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1:1.0/0003:046D:C24F.0002/input/input10
Sep 28 12:30:33 retrobox kernel: [11080.125134] logitech
0003:046D:C24F.0002: input,hidraw0: USB HID v1.11 Joystick [Logitech G29
Driving Force Racing Wheel] on usb-0000:00:1d.0-1/input0
Sep 28 12:30:33 retrobox kernel: [11080.126094] logitech
0003:046D:C24F.0002: Force feedback support for Logitech Gaming Wheels
Sep 28 12:30:33 retrobox kernel: [11080.134307] logitech
0003:046D:C24F.0003: hiddev0,hidraw1: USB HID v1.11 Device [Logitech G29
Driving Force Racing Wheel] on usb-0000:00:1d.0-1/input1
Sep 28 12:30:33 retrobox kernel: [11080.134319] logitech
0003:046D:C24F.0003: not enough values in HID_OUTPUT_REPORT 0 field 0
Sep 28 12:30:33 retrobox kernel: [11080.134339] logitech: probe of
0003:046D:C24F.0003 failed with error -1
--

Any suggestions as to how we can 'ignore' or unbind the 2nd interface in
order to only work with the 1st?
Simon
G29 connected, appears as DFEX then we send command to get it to reconnect
--
Sep 28 12:30:32 retrobox kernel: [11078.904047] usb 2-1: new full-speed USB device number 2 using uhci_hcd
Sep 28 12:30:32 retrobox kernel: [11079.077104] usb 2-1: New USB device found, idVendor=046d, idProduct=c294
Sep 28 12:30:32 retrobox kernel: [11079.077115] usb 2-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
Sep 28 12:30:32 retrobox kernel: [11079.077122] usb 2-1: Product: G29 Driving Force Racing Wheel
Sep 28 12:30:32 retrobox kernel: [11079.077128] usb 2-1: Manufacturer: Logitech
Sep 28 12:30:32 retrobox mtp-probe: checking bus 2, device 2: "/sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1"
Sep 28 12:30:32 retrobox mtp-probe: bus: 2, device: 2 was not an MTP device
Sep 28 12:30:32 retrobox kernel: [11079.266693] input: Logitech G29 Driving Force Racing Wheel as /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1:1.0/0003:046D:C294.0001/input/input9
Sep 28 12:30:32 retrobox kernel: [11079.267441] logitech 0003:046D:C294.0001: input,hidraw0: USB HID v1.00 Joystick [Logitech G29 Driving Force Racing Wheel] on usb-0000:00:1d.0-1/input0
Sep 28 12:30:32 retrobox kernel: [11079.276117] usbcore: registered new interface driver usbhid
Sep 28 12:30:32 retrobox kernel: [11079.276127] usbhid: USB HID core driver
Sep 28 12:30:32 retrobox kernel: [11079.320193] usb 2-1: USB disconnect, device number 2
Sep 28 12:30:32 retrobox systemd-udevd[243]: error opening USB device 'descriptors' file
Sep 28 12:30:33 retrobox kernel: [11079.944056] usb 2-1: new full-speed USB device number 3 using uhci_hcd
Sep 28 12:30:33 retrobox kernel: [11080.113102] usb 2-1: New USB device found, idVendor=046d, idProduct=c24f
Sep 28 12:30:33 retrobox kernel: [11080.113113] usb 2-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
Sep 28 12:30:33 retrobox kernel: [11080.113120] usb 2-1: Product: G29 Driving Force Racing Wheel
Sep 28 12:30:33 retrobox kernel: [11080.113125] usb 2-1: Manufacturer: Logitech
Sep 28 12:30:33 retrobox kernel: [11080.124431] input: Logitech G29 Driving Force Racing Wheel as /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1:1.0/0003:046D:C24F.0002/input/input10
Sep 28 12:30:33 retrobox kernel: [11080.125134] logitech 0003:046D:C24F.0002: input,hidraw0: USB HID v1.11 Joystick [Logitech G29 Driving Force Racing Wheel] on usb-0000:00:1d.0-1/input0
Sep 28 12:30:33 retrobox kernel: [11080.126094] logitech 0003:046D:C24F.0002: Force feedback support for Logitech Gaming Wheels
Sep 28 12:30:33 retrobox kernel: [11080.134307] logitech 0003:046D:C24F.0003: hiddev0,hidraw1: USB HID v1.11 Device [Logitech G29 Driving Force Racing Wheel] on usb-0000:00:1d.0-1/input1
Sep 28 12:30:33 retrobox kernel: [11080.134319] logitech 0003:046D:C24F.0003: not enough values in HID_OUTPUT_REPORT 0 field 0
Sep 28 12:30:33 retrobox kernel: [11080.134339] logitech: probe of 0003:046D:C24F.0003 failed with error -1
Sep 28 12:30:33 retrobox mtp-probe: checking bus 2, device 3: "/sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1"
Sep 28 12:30:33 retrobox mtp-probe: bus: 2, device: 3 was not an MTP device
--

New device has 2 interfaces, the second one is not liked at all... as noted above the probe fails. Also note that there is no report descripter presented in the 2nd interface's '/sys/bus/hid/devices/...' directory

$ lsusb --vv
--
Bus 002 Device 003: ID 046d:c24f Logitech, Inc.
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x046d Logitech, Inc.
idProduct 0xc24f
bcdDevice 89.00
iManufacturer 1
iProduct 2
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 66
bNumInterfaces 2
bConfigurationValue 1
iConfiguration 4
bmAttributes 0x80
(Bus Powered)
MaxPower 200mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 3 Human Interface Device
bInterfaceSubClass 0 No Subclass
bInterfaceProtocol 0 None
iInterface 0
HID Device Descriptor:
bLength 9
bDescriptorType 33
bcdHID 1.11
bCountryCode 0 Not supported
bNumDescriptors 1
bDescriptorType 34 Report
wDescriptorLength 125
Report Descriptors:
** UNAVAILABLE **
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0010 1x 16 bytes
bInterval 2
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x01 EP 1 OUT
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 2
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 3 Human Interface Device
bInterfaceSubClass 0 No Subclass
bInterfaceProtocol 0 None
iInterface 0
HID Device Descriptor:
bLength 9
bDescriptorType 33
bcdHID 1.11
bCountryCode 0 Not supported
bNumDescriptors 1
bDescriptorType 34 Report
wDescriptorLength 54
Report Descriptors:
** UNAVAILABLE **
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0014 1x 20 bytes
bInterval 2
--

$ ls -la /sys/bus/hid/devices/0003\:046D\:C24F.0002/
--
total 0
drwxr-xr-x 6 root root 0 Sep 28 12:37 .
drwxr-xr-x 6 root root 0 Sep 28 12:37 ..
-rw-rw-r-- 1 root root 4096 Sep 28 12:37 alternate_modes
-r--r--r-- 1 root root 4096 Sep 28 12:37 country
lrwxrwxrwx 1 root root 0 Sep 28 12:37 driver -> ../../../../../../../bus/hid/drivers/logitech
drwxr-xr-x 3 root root 0 Sep 28 12:37 hidraw
drwxr-xr-x 3 root root 0 Sep 28 12:37 input
drwxr-xr-x 7 root root 0 Sep 28 12:37 leds
-r--r--r-- 1 root root 4096 Sep 28 12:37 modalias
drwxr-xr-x 2 root root 0 Sep 28 12:37 power
-rw-rw-r-- 1 root root 4096 Sep 28 12:37 range
-r--r--r-- 1 root root 4096 Sep 28 12:37 real_id
-r--r--r-- 1 root root 4096 Sep 28 12:37 report_descriptor
lrwxrwxrwx 1 root root 0 Sep 28 12:37 subsystem -> ../../../../../../../bus/hid
-rw-r--r-- 1 root root 4096 Sep 28 12:37 uevent
--

$ ls -la /sys/bus/hid/devices/0003\:046D\:C24F.0003/
--
total 0
drwxr-xr-x 4 root root 0 Sep 28 12:35 .
drwxr-xr-x 6 root root 0 Sep 28 12:35 ..
-r--r--r-- 1 root root 4096 Sep 28 12:35 country
drwxr-xr-x 3 root root 0 Sep 28 12:35 hidraw
-r--r--r-- 1 root root 4096 Sep 28 12:35 modalias
drwxr-xr-x 2 root root 0 Sep 28 12:35 power
-r--r--r-- 1 root root 4096 Sep 28 12:35 report_descriptor
lrwxrwxrwx 1 root root 0 Sep 28 12:35 subsystem -> ../../../../../../../bus/hid
-rw-r--r-- 1 root root 4096 Sep 28 12:35 uevent
--

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