Re: [Bluez-devel] question about hci_usb endpoint selection...

[Lars Grunewaldt <lgw@dark-reality.de>]

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Marcel Holtmann wrote:

| look at the hci_usb driver and add the notify() callback function for
| it. This function gets called when you change the voice setting or a new
| connection is added or removed. I changed the connection hash to count
| the ACL and SCO links separatly and disabled the tasklet when calling
| this function so that the core stops processing TX packets and enable it
| after the driver finished anything it has to do.

Hi there,

OK, I added hci_usb_notify(..) and it works as it should (get's the
notify when voice mode is changed).

Now for the "real stuff"... :)

I think to handle the voice mode change correctly, I have to duplicate
the code from about line 874..922 that locates the "proper" alternate
setting; before this can happen, the notify function must close

((husb *)hdev->driver_data)->isoc_iface with
usb_driver_release_interface(...)

is there anything else to do? Must some buffers be dropped or free'd or
something? is it possible to simply re-set
isoc_iface, isoc_in_ep and isoc_out_ep?

Or is it in fact not neccesary to disconnect isoc_iface and only change
the values of isoc_in_ep and isoc_out_ep?

I don't know much about the usb internals, so I ask the list again.

Thanks very much for bringing this topic forward :))

cu,
~  Lars

PS: one last question, I'm using kernel 2.6.8.1 now and hci_usb.c uses
CONFIG_BT_HCIUSB_DEBUG to enable/disable debugging; my kernel config
says this option does not exists, so, how to enable debugging properly?
Or is just the option accidently missing from kernel config in this release?

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