usb/183505: [usb] Arduino Leonardo exposes three interface descriptors but no modem is attached to the first one (bInterfaceSubClass=2)

[adrian chadd]

>Number:         183505
>Category:       usb
>Synopsis:       [usb] Arduino Leonardo exposes three interface descriptors but no modem is attached to the first one (bInterfaceSubClass=2)
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-usb
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Oct 30 22:40:00 UTC 2013
>Closed-Date:
>Last-Modified:
>Originator:     adrian chadd
>Release:        11-HEAD i386
>Organization:
>Environment:
FreeBSD lucy-11i386 11.0-CURRENT FreeBSD 11.0-CURRENT #0 r257371: Wed Oct 30 00:08:14 PDT 2013     adrian at lucy-11i386:/usr/home/adrian/work/freebsd/head/obj/usr/home/adrian/work/freebsd/head/src/sys/LUCY_11_i386  i386

>Description:
When plugging in the Arduino Leonardo, it doesn't stay connected as a modem.

It connects, shows a modem device, then disconnects and reappears as a device with three interfaces.

Unfortunately the only one which shows up is uhid.

>How-To-Repeat:

Plug in an Arduino Leonardo.

It comes up as a modem very briefly:

umodem0: <Arduino LLC Arduino Leonardo, class 2/0, rev 1.10/0.01, addr 3> on usbus4
umodem0: data interface 1, has CM over data, has break

. then it disconnects (I guess it loads in something) and comes back as multiple interfaces:

ugen4.3: <Arduino LLC> at usbus4 (disconnected)
umodem0: at uhub2, port 2, addr 3 (disconnected)
ugen4.3: <Arduino LLC> at usbus4
uhid2: <Arduino LLC Arduino Leonardo, class 2/0, rev 2.00/1.00, addr 3> on usbus4

I dumped the descriptor:

# usbconfig -d ugen4.3 dump_all_config_desc



ugen4.3: <Arduino Leonardo Arduino LLC> at usbus4, cfg=0 md=HOST spd=FULL (12Mbps) pwr=ON (500mA)


 Configuration index 0

    bLength = 0x0009
    bDescriptorType = 0x0002
    wTotalLength = 0x0064
    bNumInterfaces = 0x0003
    bConfigurationValue = 0x0001
    iConfiguration = 0x0000  <no string>
    bmAttributes = 0x0080
    bMaxPower = 0x00fa

    Additional Descriptor

    bLength = 0x08
    bDescriptorType = 0x0b
    bDescriptorSubType = 0x00
     RAW dump:
     0x00 | 0x08, 0x0b, 0x00, 0x02, 0x02, 0x02, 0x01, 0x00


    Interface 0
      bLength = 0x0009
      bDescriptorType = 0x0004
      bInterfaceNumber = 0x0000
      bAlternateSetting = 0x0000
      bNumEndpoints = 0x0001
      bInterfaceClass = 0x0002
      bInterfaceSubClass = 0x0002
      bInterfaceProtocol = 0x0000
      iInterface = 0x0000  <no string>

      Additional Descriptor

      bLength = 0x05
      bDescriptorType = 0x24
      bDescriptorSubType = 0x00
       RAW dump:
       0x00 | 0x05, 0x24, 0x00, 0x10, 0x01


      Additional Descriptor

      bLength = 0x05
      bDescriptorType = 0x24
      bDescriptorSubType = 0x01
       RAW dump:
       0x00 | 0x05, 0x24, 0x01, 0x01, 0x01


      Additional Descriptor

      bLength = 0x04
      bDescriptorType = 0x24
      bDescriptorSubType = 0x02
       RAW dump:
       0x00 | 0x04, 0x24, 0x02, 0x06


      Additional Descriptor

      bLength = 0x05
      bDescriptorType = 0x24
      bDescriptorSubType = 0x06
       RAW dump:
       0x00 | 0x05, 0x24, 0x06, 0x00, 0x01


     Endpoint 0
        bLength = 0x0007
        bDescriptorType = 0x0005
        bEndpointAddress = 0x0081  <IN>
        bmAttributes = 0x0003  <INTERRUPT>
        wMaxPacketSize = 0x0010
        bInterval = 0x0040
        bRefresh = 0x0000
        bSynchAddress = 0x0000


    Interface 1
      bLength = 0x0009
      bDescriptorType = 0x0004
      bInterfaceNumber = 0x0001
      bAlternateSetting = 0x0000
      bNumEndpoints = 0x0002
      bInterfaceClass = 0x000a
      bInterfaceSubClass = 0x0000
      bInterfaceProtocol = 0x0000
      iInterface = 0x0000  <no string>

     Endpoint 0
        bLength = 0x0007
        bDescriptorType = 0x0005
        bEndpointAddress = 0x0002  <OUT>
        bmAttributes = 0x0002  <BULK>
        wMaxPacketSize = 0x0040
        bInterval = 0x0000
        bRefresh = 0x0000
        bSynchAddress = 0x0000

     Endpoint 1
        bLength = 0x0007
        bDescriptorType = 0x0005
        bEndpointAddress = 0x0083  <IN>
        bmAttributes = 0x0002  <BULK>
        wMaxPacketSize = 0x0040
        bInterval = 0x0000
        bRefresh = 0x0000
        bSynchAddress = 0x0000


    Interface 2
      bLength = 0x0009
      bDescriptorType = 0x0004
      bInterfaceNumber = 0x0002
      bAlternateSetting = 0x0000
      bNumEndpoints = 0x0001
      bInterfaceClass = 0x0003
      bInterfaceSubClass = 0x0000
      bInterfaceProtocol = 0x0000
      iInterface = 0x0000  <no string>

      Additional Descriptor

      bLength = 0x09
      bDescriptorType = 0x21
      bDescriptorSubType = 0x01
       RAW dump:
       0x00 | 0x09, 0x21, 0x01, 0x01, 0x00, 0x01, 0x22, 0x65,
       0x08 | 0x00

     Endpoint 0
        bLength = 0x0007
        bDescriptorType = 0x0005
        bEndpointAddress = 0x0084  <IN>
        bmAttributes = 0x0003  <INTERRUPT>
        wMaxPacketSize = 0x0040
        bInterval = 0x0001
        bRefresh = 0x0000
        bSynchAddress = 0x0000



root at lucy-11i386:/home/adrian #

>Fix:


>Release-Note:
>Audit-Trail:
>Unformatted: