On Tue, Dec 18, 2012 at 09:59:16PM +0800, victor yeo wrote: > Hi, > > >> > > > >> > > The udc_start() function is being called now. Before this, it was not > >> > > called because of driver->max_speed checking in udc_start(). After > >> > > udc_start(), which function is to be called when the gadget device is > >> > > connected to the host PC? > >> > > > >> > > Thanks. I will look at the "controller 'kagen2_usb' not recognized" > >> message. > >> > > The development is being done on arm9 architecture. I am afraid it is > >> > > not possible to move to a newer kernel now. > >> > > >> > fair enough. Just to help you out, I believe that message will be under > >> > drivers/usb/gadget/gadget_chips.h: > >> > > >> > > >> http://git.kernel.org/?p=linux/kernel/git/balbi/usb.git;a=blob;f=drivers/usb > >> /gad > >> > get/gadget_chips.h;h=a8855d0b7f3bdf19fbdc76eab8a25992f07884b0;hb=76e1 > >> > 0d158efb6d4516018846f60c2ab5501900bc > >> > > >> > note that you must add your gadget_is_kagen2() and check for it on > >> > usb_gadget_controller_number(). Also keep in mind that this doesn't exist > >> > anymore for recent kernels. > >> > > >> > >> Thanks, I got it done. I can insmod the g_file_storage.ko without the > >> "controller 'kagen2_usb' not recognized" message. After that, can I simply > >> connect the usb cable to the host PC? Because the PC says "USB device not > >> recognised" when I do so. I have registered the irq routine in > >> kagen2_udc.ko, and it is not called when usb cable is plugged in. What can > >> go wrong? > > > > from this point on, you need to read your HW documentation. Maybe you're > > using wrong IRQ number ? Who knows. I have no clue how kagen2 works and > > can't help anymore. > > > > I find out the IRQ number for usb, and unmask that IRQ number in > interrupt controller. So usb cable is plugged into host PC, the gadget > (which runs on linux) freezes immediately, no error message is printed > out, no device reset. > > now i don't know whether linux hang or the hardware hang. Like I said, I can't support you on that. Ask for support from whoever provided you this kernel. You need to read your HW documentation and figure out if there is any bug in the controller driver you're writing. good luck -- balbi
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