qmk_firmware/keyboards/jj40/tools/usb_detach.c
Oscillope c70b419ec0 Add multiple layout support and Linux flash utility to JJ40 (#1837)
* Adds support for multiple layouts. Adds custom keymap for "offset"
layout.

* Adds a tool to help detach the keyboard from the Linux HID driver before programming.

* Adds a tool to help detach the keyboard from the Linux HID driver before programming.
2017-10-13 19:04:36 -10:00

33 lines
1.2 KiB
C

/* 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");
}
}