diff options
Diffstat (limited to 'keyboards/jj4x4/tools')
| -rw-r--r-- | keyboards/jj4x4/tools/README.md | 16 | ||||
| -rw-r--r-- | keyboards/jj4x4/tools/usb_detach.c | 33 |
2 files changed, 49 insertions, 0 deletions
diff --git a/keyboards/jj4x4/tools/README.md b/keyboards/jj4x4/tools/README.md new file mode 100644 index 000000000..081984ed4 --- /dev/null +++ b/keyboards/jj4x4/tools/README.md @@ -0,0 +1,16 @@ +# JJ40 Tools + +## usb_detach.c + +When trying to flash on Linux, you may encounter a "Resource Unavailable" error. This means that Linux's HID driver has taken exclusive control of the keyboard, and the program script can't flash it. +This program can force Linux to give up a device, so that the programming script can reset it. + +### To compile: +``` +gcc usb_detach.c -o usb_detach +``` + +### To run: +1. Use `lsusb` to discover the Bus and Device numbers for your keyboard. +2. Run the program: `sudo ./usb_detach /dev/bus/usb/<BUS>/<DEVICE>`. +3. Build and program the firmware as normal. diff --git a/keyboards/jj4x4/tools/usb_detach.c b/keyboards/jj4x4/tools/usb_detach.c new file mode 100644 index 000000000..c21e47a7a --- /dev/null +++ b/keyboards/jj4x4/tools/usb_detach.c @@ -0,0 +1,33 @@ +/* Found at https://www.linuxquestions.org/questions/linux-hardware-18/how-to-unclaim-usb-device-558138/#post3406986 */ +#include <stdio.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <fcntl.h> +#include <linux/ioctl.h> +#include <linux/usbdevice_fs.h> + +int main(int argc, char**argv) +{ + struct usbdevfs_ioctl command; + int ret; + int fd; + int i; + if (argc>1) { + fd = open(argv[1],O_RDWR); + if (fd<1){ + perror("unable to open file"); + return 1; + } + for (i=0;i<255;i++){ // hack: should fetch how many interface there is. + command.ifno = i; + command.ioctl_code = USBDEVFS_DISCONNECT; + command.data = NULL; + ret = ioctl(fd, USBDEVFS_IOCTL, &command); + if(ret!=-1) + printf("un claimed interface %d %d\n",i,ret); + } + } else { + printf ("usage: %s /dev/bus/usb/BUS/DEVICE\n",argv[0]); + printf("Release all interfaces of this usb device for usage in virtualisation\n"); + } +}
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