Some USB device controllers like pxa25x/27x/3xx require their endpoints to be configured before the controller is enabled. Currently these drivers use a static configuration that may or may not match whatever combination of functions a gadget driver may bind to. On at least pxa27x/3xx we can solve this problem by adding a hook ep_autoconfig for the use of the controller drivers. This way the controller driver can configure the endpoints sees when the gadget driver is bound. I've used this to get pxa27x_udc to configure its endpoints dynamically (at gadget driver bind time, before the udc is enabled), using the Android composite gadget driver to get RNDIS + USB mass storage + ACM + ADB all working simultaneously. Would something like the attached patch be acceptable? The basic idea is to call an optional ep_autoconfig hook in usb_ep_autoconfig(), and to add configuration and interface arguments to usb_ep_autoconfig(). Matt
Attachment:
0001-USB-gadget-add-ep_autoconfig-hook.patch
Description: Binary data
