[Bug 218338] New: usb: cdc_acm: Support for Uniden BC125AT radio scanner

[bugzilla-daemon@kernel.org]

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: drivers_usb@kernel-bugs.kernel.org
          Reporter: felipe.aranda@gmail.com
        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/20180706054524.670321998@linuxfoundation.org/


Thanks in advance !

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