[Bluez-users] Re: [Linux-usb-users] Problem with bluetooth USB on Powerbook G4

[Andrew de Quincey <adq_dvb@lidskialf.net>]

On Tuesday 02 Aug 2005 09:44, Andrew de Quincey wrote:
> On Tuesday 02 Aug 2005 02:54, Alan Stern wrote:
> > On Mon, 1 Aug 2005, Andrew de Quincey wrote:
> > > Hi, I'm having a problem with linux and the Powerbook G4's bluetooth
> > > USB device. First of all though, versions:
> > >
> > > Kernel: 2.6.13-rc4
> > > Powerbook: 15" G4 post Feb-2005
> > >
> > > On my machine, the bluetooth USB device is not detected. Now I know
> > > that Johannes Berg has a page explaining how he got it to work, but it
> > > doesn't work for me.
> > >
> > > On my machine, lsusb -t gives:
> > > Bus#  4
> > > `-Dev#   1 Vendor 0x0000 Product 0x0000
> > > Bus#  3
> > > `-Dev#   1 Vendor 0x0000 Product 0x0000
> > > Bus#  2
> > > `-Dev#   1 Vendor 0x0000 Product 0x0000
> > > Bus#  1
> > > `-Dev#   1 Vendor 0x0000 Product 0x0000
> > >
> > >   |-Dev#   5 Vendor 0x05ac Product 0x1000
> > >
> > >   `-Dev#   6 Vendor 0x05ac Product 0x020f
> > >
> > > On Johannes' machine (with working USB bluetooth), it gives:
> > > Bus# =A04
> > > `-Dev# =A0 1 Vendor 0x0000 Product 0x0000
> > > Bus# =A03
> > > `-Dev# =A0 1 Vendor 0x0000 Product 0x0000
> > > Bus# =A02
> > > `-Dev# =A0 1 Vendor 0x0000 Product 0x0000
> > > Bus# =A01
> > > `-Dev# =A0 1 Vendor 0x0000 Product 0x0000
> > > =A0 |-Dev# =A0 7 Vendor 0x05ac Product 0x8205
> > > =A0 `-Dev# =A0 6 Vendor 0x05ac Product 0x020e
> > >
> > > Oddity: Johannes' USB tree doesn't have a device#5, but mine does.
> >
> > The device numbers aren't particularly important.  They are assigned one
> > by one as devices are found by the kernel and have nothing to do with t=
he
> > devices' inherent characteristics.  The significant thing is that you
> > both show two devices, even though the product IDs differ.  Your 0x020f
> > may be the same kind of device as Johannes's 0x020e -- it's harder to
> > tell what's going on with your 0x1000 and his 0x8205.  Maybe the
> > Bluetooth device requires a firmware upload, which causes the ID to
> > change.  If your system failed to carry out the upload, it would explain
> > why the device doesn't work properly.
> >
> > > Mac OS X detects and uses the device perfectly. It's USB tree utility
> > > shows that Bus#1 has two devices - the apple keyboard/trackpad
> > > 0x5ac/0x20f and the USB bluetooth device, 0x5ac/0x8205 - no sign of an
> > > 0x5ac/0x1000 device.
> >
> > That's consistent with the ID changing as a result of new firmware.
> >
> > > In my dmesg, I get:
> >
> > ...
> >
> > > usb 1-1: device descriptor read/64, error -71
> > > usb 1-1: device descriptor read/64, error -71
> > > usb 1-1: new full speed USB device using ohci_hcd and address 3
> > > usb 1-1: device descriptor read/64, error -71
> > > usb 1-1: device descriptor read/64, error -71
> > > usb 1-1: new full speed USB device using ohci_hcd and address 4
> > > usb 1-1: device descriptor read/8, error -71
> > > usb 1-1: device descriptor read/8, error -71
> > > usb 1-1: new full speed USB device using ohci_hcd and address 5
> > > usb 1-2: new full speed USB device using ohci_hcd and address 6
> > >
> > > -- those -71 errors are fixed for Johannes by specifying
> > > "use_both_schemes=3D1" as a module parameter to usbcore. However this
> > > doesn't  work for me. And in fact, in rc4, use_both_schemes is
> > > defaulted to 1 anyway.
> >
> > Those errors probably are just transient, not fatal.  I think you can
> > safely ignore them.  After all, the devices _are_ detected in the end.
> >
> > > I have compared Johannes' .config and mine - and there are (now) no
> > > differences - yet still it isn't working.
> > >
> > > Oh - all other USB devices work fine.
> > >
> > > What can I try next?
> >
> > Try to find out if the Bluetooth driver does upload firmware to the
> > device and if something goes wrong with the upload.  It would also be a
> > good idea to CC: the maintainer of the Bluetooth driver.
>
> Aha, great idea. I've been browsing about in the mac os file system, and =
it
> does seem to support several bluetooth devices.. I'm specifically
> interested in "BroadcomUSBBluetoothFirmwareDownload.kext" which sounds
> likely. I'll find out the exact hardware used later.
>
> I see there _is_ a linux driver for a USB broadcom bluetooth adapter that
> uploads firmware. I'll try that one out in a bit - hopefully it is just a
> matter of adding the correct USB IDs.
>
> CCed to the bluetooth list in case anyone can throw light on this.

Just noticed another weirdness - this mysterious 0x5ac/0x1000 device. Under=
 an=20
lsusb -v it shows up as:


Bus 001 Device 005: ID 05ac:1000 Apple Computer, Inc.
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0
  bDeviceProtocol         0
  bMaxPacketSize0        64
  idVendor           0x05ac Apple Computer, Inc.
  idProduct          0x1000
  bcdDevice           17.92
  iManufacturer           0
  iProduct                0
  iSerial                 0
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength        15104
    bNumInterfaces          2
    bConfigurationValue     1
    iConfiguration          0
    bmAttributes         0xe0
      Self Powered
      Remote Wakeup
    MaxPower                0mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass         3 Human Interface Devices
      bInterfaceSubClass      1 Boot Interface Subclass
      bInterfaceProtocol      1 Keyboard
      iInterface              0
        HID Device Descriptor:
          bLength                 9
          bDescriptorType        33
          bcdHID               1.11
          bCountryCode            0 Not supported
          bNumDescriptors         1
          bDescriptorType        34 Report
          wDescriptorLength      63
         Report Descriptors:
           ** UNAVAILABLE **
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0010  1x 16 bytes
        bInterval               1
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass         3 Human Interface Devices
      bInterfaceSubClass      1 Boot Interface Subclass
      bInterfaceProtocol      2 Mouse
      iInterface              0
        HID Device Descriptor:
          bLength                 9
          bDescriptorType        33
          bcdHID               1.11
          bCountryCode            0 Not supported
          bNumDescriptors         1
          bDescriptorType        34 Report
          wDescriptorLength      61
         Report Descriptors:
           ** UNAVAILABLE **
      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               1


Weird eh? It says its subclass is a keyboard/mouse!=20


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