On Tue, 2005-03-29 at 12:08 -0500, jklaas wrote: > Being a usb gadget freak, I bought this combo mouse and usb controlled > FM Radio for cheap ($10 + shipping). It looks really neat, and I pretty > much figured out how to get the radio to work.
Neat. > I was wondering if there was any way to get multiple drivers talking to > the same device. Or, alternatively, can I write a libusb program that > will talk to the radio while the mouse has been grabbed by the HID > driver. You can bind drivers to specific endpoints. I would guess that the usbhid driver only grabs the endpoint that is HID, and leaves one free. Check the output of cat /proc/bus/usb/devices you should see something like I have here: T: Bus=01 Lev=01 Prnt=01 Port=01 Cnt=01 Dev#= 4 Spd=12 MxCh= 0 D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1 P: Vendor=05ac ProdID=020e Rev= 0.28 S: Manufacturer=Apple Computer S: Product=Apple Internal Keyboard/Trackpad C:* #Ifs= 3 Cfg#= 1 Atr=a0 MxPwr= 40mA I: If#= 0 Alt= 0 #EPs= 1 Cls=03(HID ) Sub=01 Prot=01 Driver=usbhid E: Ad=83(I) Atr=03(Int.) MxPS= 8 Ivl=10ms I: If#= 1 Alt= 0 #EPs= 1 Cls=03(HID ) Sub=01 Prot=02 Driver=AppleTrackpad E: Ad=81(I) Atr=03(Int.) MxPS= 32 Ivl=1ms I: If#= 2 Alt= 0 #EPs= 1 Cls=03(HID ) Sub=00 Prot=00 Driver=usbhid E: Ad=84(I) Atr=03(Int.) MxPS= 1 Ivl=10ms Except "Driver=(none)" for the radio. There, I have a single device with 3 endpoints and 2 drivers bound to them. The source for the AppleTrackpad driver is available from http://johannes.sipsolutions.net/PowerBook Basically I just went through the same question you did and have the answer in there. johannes
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