On Mon, Mar 13, 2006 at 09:11:11PM -0500, Craig W. Nadler wrote: > I've put together a patch demonstrating how Interface Association > Descriptors could be supported with a minimal amount of changes the > current USB stack. When a USB device is enumerated the descriptors are > parsed by the code in drivers/usb/core/config.c. A list of IADs for a > given configuration would be stored in the usb_host_config struct for > that configuration. If an interface is referenced by an IAD then a > pointer to the IAD will be stored in the usb_host_interface struct for > that interface. > The probe entry point of a class driver could check if the interface > it's probing is referenced by an IAD. If it is then configure the driver > to handle the other associated interfaces as well. The probe function > could also check the "extra" and "extralen" fields in the > usb_host_interface struct for each interface to get the class specific > descriptors. > > The code that displays descriptor information in /proc/bus/usb/devices > will show IADs in the following format: > > A: 1stIf= 0 IfCount= 2 Cls=ff(vend.) Sub=03 Prot=00
Why "1stIf"? And what about sysfs support? That's more important these days than usbfs files :) thanks, greg k-h ------------------------------------------------------- This SF.Net email is sponsored by xPML, a groundbreaking scripting language that extends applications into web and mobile media. Attend the live webcast and join the prime developer group breaking into this new coding territory! http://sel.as-us.falkag.net/sel?cmd=lnk&kid=110944&bid=241720&dat=121642 _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
