[Bluez-users] Bluez USB Driver

[Bluez-users] Bluez USB Driver

[taylor]

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Dear All,
  Recently, I spend a little time to study the Bluez Driver. Attached file is my notes. Hope this is useful for others.
 
  But I have one question about the Bluez USB driver for Kernle 2.4.26 and 2.6.5.

Kernel 2.4.26:
/linux/src/driver/usb/bluetooth.c
/linux/src/driver/bluetooth/hci_usb.c

Kernel 2.6.5:
/linux/src/driver/bluetooth/hci_usb.c
 Why are there two USB drivers for 2.4.26? Because, the /linux/src/driver/bluetooth/hci_usb.c have registered with USB core and get the hci dev. I couldn't know the purpose of /linux/src/driver/usb/blueotooth.c ? Do someone know the reason?

Taylor Shieh
Engineer, Bluetooth Module Section
New Technology Development Dept., R&D Division
Tel:886-49-2325876 Ext:2188  

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Re: [Bluez-users] Bluez USB Driver

[Marcel Holtmann]

Hi Taylor,

>   Recently, I spend a little time to study the Bluez Driver. Attached
> file is my notes. Hope this is useful for others.

I can't do anything useful with a file from a Microsoft Office
application ;)
 
>   But I have one question about the Bluez USB driver for Kernle 2.4.26
> and 2.6.5.
>  
> Kernel 2.4.26:
> /linux/src/driver/usb/bluetooth.c
> /linux/src/driver/bluetooth/hci_usb.c
>  
> Kernel 2.6.5:
> /linux/src/driver/bluetooth/hci_usb.c
>  Why are there two USB drivers for 2.4.26?
> Because, the /linux/src/driver/bluetooth/hci_usb.c have registered
> with USB core and get the hci dev. I couldn't know the purpose
> of /linux/src/driver/usb/blueotooth.c ? Do someone know the reason?

the bluetooth.o from 2.4 and the bluetty.ko driver from 2.6 are for
transforming the H:2 transport protocol into a H:4 transport protocol.
Both of them are part of the kernel for allowing the use of a Bluetooth
stack that support only H:4. An example for such a stack is the OpenBT
from Axis. It is impossible to select both drivers at the same time and
if you activate the Bluetooth subsystem you will use hci_usb.ko which is
the default configuration that is shipped by every distribtuion at the
moment. For more information take a look at the mailing list archives of
the BlueZ and USB mailing lists.

Regards

Marcel




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