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SubjectRe: [PATCH v5 1/1] HID: Add full support for Logitech Unifying receivers
From
Hi Richard,

here, you'll find a small C program that allows you to do a pairing of
a new device to a receiver.

compile it with with gcc -o pairing_tool pairing_tool.c

--------------------------------- file pairing_tool.c
---------------------------------
/*
* Copyright 2011 Benjamin Tissoires <benjamin.tissoires@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/input.h>
#include <linux/hidraw.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdio.h>
#include <errno.h>

#define USB_VENDOR_ID_LOGITECH (__u32)0x046d
#define USB_DEVICE_ID_UNIFYING_RECEIVER (__s16)0xc52b
#define USB_DEVICE_ID_UNIFYING_RECEIVER_2 (__s16)0xc532

int main(int argc, char **argv)
{
int fd;
int res;
struct hidraw_devinfo info;
char magic_sequence[] = {0x10, 0xFF, 0x80, 0xB2, 0x01, 0x00, 0x00};
if (argc == 1) {
errno = EINVAL;
perror("No hidraw device given");
return 1;
}
/* Open the Device with non-blocking reads. */
fd = open(argv[1], O_RDWR|O_NONBLOCK);
if (fd < 0) {
perror("Unable to open device");
return 1;
}
/* Get Raw Info */
res = ioctl(fd, HIDIOCGRAWINFO, &info);
if (res < 0) {
perror("error while getting info from device");
} else {
if (info.bustype != BUS_USB ||
info.vendor != USB_VENDOR_ID_LOGITECH ||
(info.product != USB_DEVICE_ID_UNIFYING_RECEIVER &&
info.product != USB_DEVICE_ID_UNIFYING_RECEIVER_2)) {
errno = EPERM;
perror("The given device is not a Logitech "
"Unifying Receiver");
return 1;
}
}
/* Send the magic sequence to the Device */
res = write(fd, magic_sequence, sizeof(magic_sequence));
if (res < 0) {
printf("Error: %d\n", errno);
perror("write");
} else if (res == sizeof(magic_sequence)) {
printf("The receiver is ready to pair a new device.\n"
"Switch your device on to pair it.\n");
} else {
errno = ENOMEM;
printf("write: %d were written instead of %ld.\n", res,
sizeof(magic_sequence));
perror("write");
}
close(fd);
return 0;
}
----------------------------- end of file pairing_tool.c
----------------------------
I hope it will be useful to you.

Cheers,
Benjamin

On Mon, Sep 19, 2011 at 22:12, Richard Schütz <r.schtz@t-online.de> wrote:
> Am 14.09.2011 18:48, schrieb Nestor Lopez Casado:
>>
>> From: Nestor Lopez Casado<nlopezcasad@logitech.com>
>>
>> With this driver, all the devices paired to a single Unifying
>> receiver are exposed to user processes in separated /input/dev
>> nodes.
>
> But there's still no way to pair devices with an Unifying receiver under
> Linux, right? It would be nice to have a simple userspace tool for that,
> too.
>
> --
> Regards,
> Richard Schütz
>
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