usbutils
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Published
20 hours ago •
gregkh
gregkh
Collect info needs unbind it
Following https://github.com/gregkh/usbview/issues/25
I'm checking if there's any way to allow root to read those without unbind.
Example with a drive I maintain: hid-t150 https://github.com/scarburato/t150_driver
$ sudo lsusb -d 044f:b677
Bus 001 Device 014: ID 044f:b677 ThrustMaster, Inc. T150 Racing Wheel
First, I'm not sure how to find the path for my usb (without look into dmesg) I did this:
$ grep b677 /sys/bus/usb/devices/*/idProduct
/sys/bus/usb/devices/1-6/idProduct:b677
From that:
$ ls -d /sys/bus/usb/devices/1-6/1-6*
/sys/bus/usb/devices/1-6/1-6:1.0
I think that's the path I need:
sudo bash -c "echo -n 1-6:1.0 >/sys/bus/usb/drivers/usbhid/unbind"
Then I can see:
$ sudo lsusb -vd 044f:b677
Bus 001 Device 014: ID 044f:b677 ThrustMaster, Inc. T150 Racing Wheel
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 0
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x044f ThrustMaster, Inc.
idProduct 0xb677 T150 Racing Wheel
bcdDevice 1.00
iManufacturer 1 Thrustmaster
iProduct 2 Thrustmaster T150RS
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 0x0029
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
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
bInterfaceProtocol 0
iInterface 0
HID Device Descriptor:
bLength 9
bDescriptorType 33
bcdHID 1.11
bCountryCode 0 Not supported
bNumDescriptors 1
bDescriptorType 34 Report
wDescriptorLength 130
Report Descriptor: (length is 130)
Item(Global): Usage Page, data= [ 0x01 ] 1
Generic Desktop Controls
Item(Local ): Usage, data= [ 0x04 ] 4
Joystick
Item(Main ): Collection, data= [ 0x01 ] 1
Application
Item(Local ): Usage, data= [ 0x01 ] 1
Pointer
Item(Main ): Collection, data= [ 0x00 ] 0
Physical
Item(Global): Report ID, data= [ 0x07 ] 7
Item(Local ): Usage, data= [ 0x30 ] 48
Direction-X
Item(Global): Logical Minimum, data= [ 0x00 ] 0
Item(Global): Logical Maximum, data= [ 0xff 0xff 0x00 0x00 ] 65535
Item(Global): Physical Minimum, data= [ 0x00 ] 0
Item(Global): Physical Maximum, data= [ 0xff 0xff 0x00 0x00 ] 65535
Item(Global): Report Size, data= [ 0x10 ] 16
Item(Global): Report Count, data= [ 0x01 ] 1
Item(Main ): Input, data= [ 0x02 ] 2
Data Variable Absolute No_Wrap Linear
Preferred_State No_Null_Position Non_Volatile Bitfield
Item(Local ): Usage, data= [ 0x31 ] 49
Direction-Y
Item(Global): Logical Maximum, data= [ 0xff 0x03 ] 1023
Item(Global): Physical Maximum, data= [ 0xff 0x03 ] 1023
Item(Main ): Input, data= [ 0x02 ] 2
Data Variable Absolute No_Wrap Linear
Preferred_State No_Null_Position Non_Volatile Bitfield
Item(Local ): Usage, data= [ 0x35 ] 53
Rotate-Z
Item(Main ): Input, data= [ 0x02 ] 2
Data Variable Absolute No_Wrap Linear
Preferred_State No_Null_Position Non_Volatile Bitfield
Item(Local ): Usage, data= [ 0x36 ] 54
Slider
Item(Main ): Input, data= [ 0x02 ] 2
Data Variable Absolute No_Wrap Linear
Preferred_State No_Null_Position Non_Volatile Bitfield
Item(Main ): Input, data= [ 0x03 ] 3
Constant Variable Absolute No_Wrap Linear
Preferred_State No_Null_Position Non_Volatile Bitfield
Item(Global): Usage Page, data= [ 0x09 ] 9
Buttons
Item(Local ): Usage Minimum, data= [ 0x01 ] 1
Button 1 (Primary)
Item(Local ): Usage Maximum, data= [ 0x0d ] 13
(null)
Item(Global): Logical Maximum, data= [ 0x01 ] 1
Item(Global): Physical Maximum, data= [ 0x01 ] 1
Item(Global): Report Size, data= [ 0x01 ] 1
Item(Global): Report Count, data= [ 0x0d ] 13
Item(Main ): Input, data= [ 0x02 ] 2
Data Variable Absolute No_Wrap Linear
Preferred_State No_Null_Position Non_Volatile Bitfield
Item(Global): Report Size, data= [ 0x0b ] 11
Item(Global): Report Count, data= [ 0x01 ] 1
Item(Main ): Input, data= [ 0x03 ] 3
Constant Variable Absolute No_Wrap Linear
Preferred_State No_Null_Position Non_Volatile Bitfield
Item(Global): Usage Page, data= [ 0x01 ] 1
Generic Desktop Controls
Item(Local ): Usage, data= [ 0x39 ] 57
Hat Switch
Item(Global): Logical Maximum, data= [ 0x07 ] 7
Item(Global): Physical Maximum, data= [ 0x3b 0x01 ] 315
Item(Global): Unit Exponent, data= [ 0x00 ] 0
Unit Exponent: 0
Item(Global): Unit, data= [ 0x14 ] 20
System: English Rotation, Unit: Degrees
Item(Global): Report Size, data= [ 0x04 ] 4
Item(Main ): Input, data= [ 0x42 ] 66
Data Variable Absolute No_Wrap Linear
Preferred_State Null_State Non_Volatile Bitfield
Item(Global): Unit, data= [ 0x00 ] 0
System: None, Unit: (None)
Item(Main ): Input, data= [ 0x03 ] 3
Constant Variable Absolute No_Wrap Linear
Preferred_State No_Null_Position Non_Volatile Bitfield
Item(Global): Report ID, data= [ 0x0a ] 10
Item(Global): Usage Page, data= [ 0x00 0xff ] 65280
(null)
Item(Local ): Usage, data= [ 0x0a ] 10
(null)
Item(Global): Report Size, data= [ 0x08 ] 8
Item(Global): Report Count, data= [ 0x0e ] 14
Item(Global): Logical Maximum, data= [ 0xff 0x00 ] 255
Item(Global): Physical Maximum, data= [ 0xff 0x00 ] 255
Item(Main ): Output, data= [ 0x02 ] 2
Data Variable Absolute No_Wrap Linear
Preferred_State No_Null_Position Non_Volatile Bitfield
Item(Global): Report ID, data= [ 0x02 ] 2
Item(Local ): Usage, data= [ 0x02 ] 2
(null)
Item(Main ): Input, data= [ 0x02 ] 2
Data Variable Absolute No_Wrap Linear
Preferred_State No_Null_Position Non_Volatile Bitfield
Item(Local ): Usage, data= [ 0x14 ] 20
(null)
Item(Global): Report ID, data= [ 0x14 ] 20
Item(Main ): Input, data= [ 0x02 ] 2
Data Variable Absolute No_Wrap Linear
Preferred_State No_Null_Position Non_Volatile Bitfield
Item(Main ): End Collection, data=none
Item(Main ): End Collection, data=none
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x82 EP 2 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 0x0020 1x 32 bytes
bInterval 4
Device Status: 0x0000
(Bus Powered)
Is there a way to see this info without unbind device? I think usbhid-dump shows basically same info
$ sudo usbhid-dump | grep -v : | xxd -r -p | hidrd-convert -o spec
Usage Page (Desktop), ; Generic desktop controls (01h)
Usage (Joystick), ; Joystick (04h, application collection)
Collection (Application),
Usage (Pointer), ; Pointer (01h, physical collection)
Collection (Physical),
Report ID (7),
Usage (X), ; X (30h, dynamic value)
Logical Minimum (0),
Logical Maximum (65535),
Physical Minimum (0),
Physical Maximum (65535),
Report Size (16),
Report Count (1),
Input (Variable),
Usage (Y), ; Y (31h, dynamic value)
Logical Maximum (1023),
Physical Maximum (1023),
Input (Variable),
Usage (Rz), ; Rz (35h, dynamic value)
Input (Variable),
Usage (Slider), ; Slider (36h, dynamic value)
Input (Variable),
Input (Constant, Variable),
Usage Page (Button), ; Button (09h)
Usage Minimum (01h),
Usage Maximum (0Dh),
Logical Maximum (1),
Physical Maximum (1),
Report Size (1),
Report Count (13),
Input (Variable),
Report Size (11),
Report Count (1),
Input (Constant, Variable),
Usage Page (Desktop), ; Generic desktop controls (01h)
Usage (Hat Switch), ; Hat switch (39h, dynamic value)
Logical Maximum (7),
Physical Maximum (315),
Unit Exponent (0),
Unit (Degrees),
Report Size (4),
Input (Variable, Null State),
Unit,
Input (Constant, Variable),
Report ID (10),
Usage Page (FF00h), ; FF00h, vendor-defined
Usage (0Ah),
Report Size (8),
Report Count (14),
Logical Maximum (255),
Physical Maximum (255),
Output (Variable),
Report ID (2),
Usage (02h),
Input (Variable),
Usage (14h),
Report ID (20),
Input (Variable),
End Collection,
End Collection
Not sure if makes sense to read that info directly on lsusb
