On Tue, Dec 13, 2016 at 02:03:08PM +0900, Kim Jaejoong wrote: > Hi Oliver and Greg > > 2016-12-12 19:45 GMT+09:00 Oliver Neukum <oneukum@xxxxxxxx>: > > On Thu, 2016-12-08 at 16:16 +0100, Greg KH wrote: > >> On Fri, Dec 09, 2016 at 12:09:46AM +0900, Jae Joong Kim wrote: > >> > > Do you have a driver that was based on this skeleton that needed this > >> > > flag to be added to work properly? Has it been updated in the kernel > >> > > source tree properly for it? > >> > > > >> > > >> > Yes, Based on the skeleton driver, I made a bulk driver with > >> > URB_ZERO_PACKET and > >> > it works fine both my notebook(ubuntu 15.04/kernel 3.19) and my target > >> > board(Embedded Linux/kernel 2.6) > >> > With the bulk driver, I am developing USB logging daemon. > >> > >> That's great. But, the biggest problem with the skeleton driver is > >> that it is not really needed anymore. Very rarely do we need to ever > >> write a new USB driver these days. Things like a "USB logging daemon" > >> using bulk endpoints can be easier to write in userspace using libusb, > >> and have it work on all operating systems. Kernel USB drivers are a > >> rare thing for brand new types of devices anymore, which is nice. > > My target board(kernel 2.6) does not support libusb because there is > no USB_DEVICEFS config (long long ago kernel USB config). > That's why I made a bulk driver based on skeleton driver for USB logging daemon. usbfs has been around since the 2.4 kernel days, you have support for it (might be called usbdevfs or something else like that, I can't remember decades old code, sorry...) So you still can do this just fine for your 2.6 kernel from userspace, using libusb. I recommend it, as then it will "just work" when you move to a kernel that is actually supported and maintained and has been released in the past decade :) good luck! greg k-h -- 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
