New: usb: cdc_acm: Support for Uniden BC125AT radio scanner

https://bugzilla.kernel.org/show_bug.cgi?id=218338

            Bug ID: 218338
           Summary: usb: cdc_acm: Support for Uniden BC125AT radio scanner
           Product: Drivers
           Version: 2.5
          Hardware: All
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P3
         Component: USB
          Assignee: [email protected]
          Reporter: [email protected]
        Regression: No

Uniden BC125AT radio scanner has USB interface which fails to work with cdc_acm driver:

dmesg:
~~~
usb 1-2: New USB device found, idVendor=1965, idProduct=0017, bcdDevice= 0.01 usb 1-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3 usb 1-2: Product: BC125AT
usb 1-2: Manufacturer: Uniden America Corp.
usb 1-2: SerialNumber: 0001
cdc_acm 1-2:1.0: Zero length descriptor references
cdc_acm: probe of 1-2:1.0 failed with error -22
~~~

lsusb -v of the device:
~~~
Bus 001 Device 012: ID 1965:0017 Uniden Corporation BC125AT Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00

  bDeviceClass            2 Communications
  bDeviceSubClass         0 [unknown]
  bDeviceProtocol         0 
  bMaxPacketSize0        64
  idVendor           0x1965 Uniden Corporation
  idProduct          0x0017 BC125AT
  bcdDevice            0.01
  iManufacturer           1 Uniden America Corp.
  iProduct                2 BC125AT
  iSerial                 3 0001
  bNumConfigurations      1

Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 0x0030
bNumInterfaces 2
bConfigurationValue 1
iConfiguration 0
bmAttributes 0x80
(Bus Powered)
MaxPower 500mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 2 Communications
bInterfaceSubClass 2 Abstract (modem)
bInterfaceProtocol 0
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x87 EP 7 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0008 1x 8 bytes
bInterval 10
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 10 CDC Data
bInterfaceSubClass 0 [unknown]
bInterfaceProtocol 0
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x02 EP 2 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 0
Device Status: 0x0000
(Bus Powered)
~~~

The code to add in /drivers/usb/class/cdc-acm.c

~~~
{ USB_DEVICE(0x1965, 0x0017), /* Uniden BC125AT */ .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ },
~~~

Reference:
https://lore.kernel.org/lkml/[email protected]/

Thanks in advance !

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Can you submit a patch to the mailing list, as documented, that adds this change in this same format?

Otherwise we can't do much with just this bug report as-is, sorry.

thanks,

greg k-h

https://bugzilla.kernel.org/show_bug.cgi?id=218338

--- Comment #1 from Greg Kroah-Hartman ([email protected]) ---

Can you submit a patch to the mailing list, as documented, that adds this change in this same format?

Otherwise we can't do much with just this bug report as-is, sorry.

thanks,

greg k-h

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