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 <oneu...@suse.com>: > > 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 majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
