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Relocate usb_detach to utils (#5121)

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* Relocate usb_detach to utils

* Relocate usb_detach to utils - fix up files after move
This commit is contained in:
zvecr 2019-02-18 17:03:44 +00:00 • committed by Drashna Jaelre
parent 545f95c8f4
commit 1a6a2a7b75
7 changed files with 24 additions and 105 deletions
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16
keyboards/jj4x4/tools/README.md
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# 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.

33
keyboards/jj4x4/tools/usb_detach.c
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/* 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");
}
}