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SubjectRe: [PATCH v5 1/1] HID: Add full support for Logitech Unifying receivers
From
On 17/04/2012, Jiri Kosina <jkosina@suse.cz> wrote:
> On Thu, 22 Sep 2011, Benjamin Tissoires wrote:
>
>> 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
>
> Could this perhaps be provided into Documentation/ or samples/ somewhere?
> I don't think that Logitech themselves do ship pairing application for
> Linux, or do they?
>

Hi Jiri,

well, I don't have any information about an official pairing tool.
However, I don't think the kernel is the good place for this stuff.
Other people started projects based on this code:
https://bitbucket.org/clach04/logitech-unifying-receiver-tools/ for instance.

Thanks,
Benjamin

> If they don't, it'd be nice to have this at least documented somewhere, so
> that someone could write a pairing GUI.
>
> Thanks.
>
>>
>> --------------------------------- 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;
>> }
>
> --
> Jiri Kosina
> SUSE Labs
>
>


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