Hi, > > > > > > > > # ls /dev/mmc* > > > > /dev/mmc0 /dev/mmc2 /dev/mmcblk0p1 > > > > /dev/mmc1 /dev/mmcblk0 /dev/mmcblk0p2 > > > > > > > > # mount /dev/mmcblk0 /mnt > > > > # ls /mnt/ > > > > initramfs.gz > > > > # umount /mnt > > > > umounting 1 > > > > umounting 0 > > > > # insmod kagen2_udc.ko > > > > # insmod g_file_storage.ko file=/dev/mmcblk0 > > > > insmod: can't insert 'g_file_storage.ko': No such device > > > > > > are you registering your udc with the udc class ?? Are you > > > initilizing > > > udc->gadget.dev ? Look at other udc drivers to check if you're > > > udc->missing > > > something. For example look at > > > drivers/usb/dwc3/gadget.c::dwc3_gadget_init() to see how I register > > > the gadget device and how I add the gadget to the list of UDCs. > > > > > > Also look at drivers/usb/dwc3/gadget.c::dwc3_gadget_start() to see > > > how > > that > > > should be implemented. > > > -- > > > balbi > > > > I look at drivers/usb/dwc3/gadget.c and compare to my UDC code. The > > difference is my UDC probe function is declared in platform driver, > > and the platform probe function is not called. How could the file > > storage gadget know it needs to call my UDC code? Is it done by the > > platform_add_devices(struct platform_device **pdevs, int ndev) which > > is to add UDC driver to the linux system? > > > > Here is my probe function. Somehow, It is not called after insmod. > > if it's not called it's because you don't have a matching platform_device. > > For a driver's probe() to be called you need a platform_device with the same > name. > -- > balbi
Thanks. The driver's probe() can be called. Now when insmod g_file_storage.ko, it says the file-backed storage gadget failed to start. I have defined the udc_start() function in usb_gadget_ops structure and added the udc_start() function. What else do I need to add? Here is the message at console: # insmod kagen2_udc.ko # insmod g_file_storage.ko file=/dev/mmcblk0 gadget: controller 'kagen2_usb' not recognized gadget: No serial-number string provided! gadget: File-backed Storage Gadget, version: 1 September 2010 gadget: NOTE: This driver is deprecated. Consider using g_mass_storage instead. gadget: Number of LUNs=1 g_file_storage gadget-lun0: ro=0, nofua=0, file: /dev/mmcblk0 g_file_storage kagen2_usb: failed to start File-backed Storage Gadget: -22 insmod: can't insert 'g_file_storage.ko': invalid parameter thanks, victor ================================================================================================ CONFIDENTIALITY NOTE: This e-mail and any attachments may contain confidential information and may be protected by legal privilege. If you are not the intended addressee (or authorized to receive for the addressee). be aware that any disclosure, copying, distribution or use of this e-mail or any attachment is prohibited. If you have received this e-mail in error, please notify us immediately by returning it to the sender and delete this copy from your system. Thank you for your cooperation. KeyASIC Inc. ================================================================================================ -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
