Hi Felipe, > -----Original Message----- > From: Felipe Balbi [mailto:balbi@xxxxxx] > Sent: Friday, April 13, 2012 4:29 PM > To: Bhupesh SHARMA > Cc: balbi@xxxxxx; gregkh@xxxxxxxxxxxxxxxxxxx; linux- > usb@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; > stern@xxxxxxxxxxxxxxxxxxx > Subject: Re: Enabling multiple gadgets on top of composite driver > > On Fri, Apr 13, 2012 at 06:51:26PM +0800, Bhupesh SHARMA wrote: > > Hi, > > > > I have a query regarding enabling multiple gadgets (like g_webcam, > > g_zero etc..) on top of the Composite driver. > > > > My use case is very simple: > > - I want to expose a USB composite device to a standard USB host, > where > > the Composite device supports a webcam gadget + zero gadget + > some other gadget.. > > look at how nokia.c does it. Ok. > > On the older kernels like 2.6.27, this was easily possible, but the > > latest gadget code doesn't seem to support the same: > > - I can see that first a 'choicemenu' is provided which allows > selection of only > > one gadget at a time. > > Answer M instead of Y to "USB Gadget Drivers" > > > - The "common" stuff like "composite.c", "epautoconfig.c" have > been included in > > each f_* function driver (for e.g. f_uvc.c, f_sourcesink.c, > etc..), so even if > > I somehow tweak the 'choicemenu' stuff, I get redeclaration > errors. > > yeah, that still needs to be cleaned up. The story behind that is very > long. > > > What is the best way to enable multiple gadgets (like g_webcam, > g_zero > > etc..) on top of the Composite driver or am I missing something here? > > Either you want multiple gadgets or you want a composite gadget, what > is it ? If you want a composite gadget, you need to write a small C > file which combines multiple functions together (see nokia.c), if you > want multiple gadget drivers, just make them all modules. I always > compile all gadget drivers as modules and can use any one of them at > any time. > Thanks for your help. I need to support multiple functions over a composite gadget. I will now have a quick look at the 'nokia.c' driver. Regards, Bhupesh -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
