shared hci transport

A lot of recent BT chips intefaced by UART also tend to have another radio [mostly FM] on the same chip sharing the transport interface i.e the UART. [bcm4325 for example has bt, fm and wlan].

I just wanted to know, from the user-space the hci0 socket interface allows me to concurrently use the uart from several applications, but
is there a way in kernel to do the same ?

[say hci_h4 is also used by the fm core to understand some vendor specific commands ?]
or in an usb case - the fm has int endpoint for control data of fm [+ hci-event/cmd packets] and bulk for rds[+ acl] [assuming the audio data path - is isolated from all these ...]

regards,
Pavan



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