linux-kernel - Re: [PATCH] usb: cdc_acm: Add quirk for Uniden UBC125 scanner

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Date:   Mon, 11 Jun 2018 12:54:11 +0200
From:   Oliver Neukum <oneukum@...e.com>
To:     Houston Yaroschoff <hstn@...er3.net>
Cc:     linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org
Subject: Re: [PATCH] usb: cdc_acm: Add quirk for Uniden UBC125 scanner

On Mo, 2018-06-11 at 12:39 +0200, Houston Yaroschoff wrote:
> Uniden UBC125 radio scanner has USB interface which fails to work
> with cdc_acm driver:
>   usb 1-1.5: new full-speed USB device number 4 using xhci_hcd
>   cdc_acm 1-1.5:1.0: Zero length descriptor references
>   cdc_acm: probe of 1-1.5:1.0 failed with error -22
> 
> Adding the NO_UNION_NORMAL quirk for the device fixes the issue:
>   usb 1-4: new full-speed USB device number 15 using xhci_hcd
>   usb 1-4: New USB device found, idVendor=1965, idProduct=0018
>   usb 1-4: New USB device strings: Mfr=1, Product=2, SerialNumber=3
>   usb 1-4: Product: UBC125XLT
>   usb 1-4: Manufacturer: Uniden Corp.
>   usb 1-4: SerialNumber: 0001
>   cdc_acm 1-4:1.0: ttyACM0: USB ACM device
> 
> `lsusb -v` of the device:
> 
>   Bus 001 Device 015: ID 1965:0018 Uniden Corporation
>   Device Descriptor:
>     bLength                18
>     bDescriptorType         1
>     bcdUSB               2.00
>     bDeviceClass            2 Communications
>     bDeviceSubClass         0
>     bDeviceProtocol         0
>     bMaxPacketSize0        64
>     idVendor           0x1965 Uniden Corporation
>     idProduct          0x0018
>     bcdDevice            0.01
>     iManufacturer           1 Uniden Corp.
>     iProduct                2 UBC125XLT
>     iSerial                 3 0001
>     bNumConfigurations      1
>     Configuration Descriptor:
>       bLength                 9
>       bDescriptorType         2
>       wTotalLength           48
>       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 None
>         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 Unused
>         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)
> 
> Signed-off-by: Houston Yaroschoff <hstn@...er3.net>
Acked-by: Oliver Neukum <oneukum@...e.com>