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/*
* Simple hack to control the wheel of Logitech's MX-Revolution mouse.
*
* Requires hiddev.
*
* Written November 2006 by E. Toernig's bonobo - no copyrights.
* Cleanup by Petteri Räty <betelgeuse@gentoo.org>
*
* Contact: Edgar Toernig <froese@gmx.de>
*
*/
// Needed for hiddev.h
#include <stdlib.h>
#include <stdio.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <asm/types.h>
#include <fcntl.h>
#include <unistd.h>
#include <linux/hiddev.h>
#include <stdarg.h>
#include <errno.h>
#define streq(a,b) (strcmp((a), (b)) == 0)
#define strneq(a,b,c) (strncmp((a), (b), (c)) == 0)
#define LOGITECH 0x046d
#define MX_REVOLUTION 0xc51a
static void
fatal(const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
fprintf(stderr, "revoco: ");
vfprintf(stderr, fmt, args);
fprintf(stderr, "\n");
va_end(args);
exit(1);
}
static int
open_dev(void)
{
char buf[128];
int i, fd;
struct hiddev_devinfo dinfo;
for (i = 0; i < 16; ++i)
{
sprintf(buf, "/dev/usb/hiddev%d", i);
fd = open(buf, O_RDWR);
if (fd >= 0)
{
if (ioctl(fd, HIDIOCGDEVINFO, &dinfo) == 0)
if (dinfo.vendor == (short)LOGITECH)
if (dinfo.product == (short)MX_REVOLUTION)
return fd;
close(fd);
}
}
return -1;
}
static void
close_dev(int fd)
{
close(fd);
}
static void
send_cmd(int fd, int b1, int b2, int b3)
{
struct hiddev_usage_ref_multi uref;
struct hiddev_report_info rinfo;
uref.uref.report_type = HID_REPORT_TYPE_OUTPUT;
uref.uref.report_id = 0x10;
uref.uref.field_index = 0;
uref.uref.usage_index = 0;
uref.num_values = 6;
uref.values[0] = 0x01; // ET: No idea what the first three values
uref.values[1] = 0x80; // mean. The SetPoint software sends them ...
uref.values[2] = 0x56;
uref.values[3] = b1;
uref.values[4] = b2;
uref.values[5] = b3;
if (ioctl(fd, HIDIOCSUSAGES, &uref) == -1)
fatal("HIDIOCSUSAGES: %s", strerror(errno));
rinfo.report_type = HID_REPORT_TYPE_OUTPUT;
rinfo.report_id = 0x10;
rinfo.num_fields = 1;
if (ioctl(fd, HIDIOCSREPORT, &rinfo) == -1)
fatal("HIDIOCSREPORT: %s", strerror(errno));
}
static int
getarg(const char *str, int def, int min, int max)
{
if (*str == '\0')
return def;
if (*str == '=')
{
int n = atoi(str + 1);
if (n >= min && n <= max)
return n;
fatal("argument `%s' out of range (%d-%d)", str + 1, min, max);
}
fatal("bad argument `%s'", str);
return 0;
}
static void
configure(int handle, int argc, char **argv)
{
int i, arg;
for (i = 1; i < argc; ++i)
if (streq(argv[i], "free"))
{
send_cmd(handle, 1, 0, 0);
}
else if (streq(argv[i], "click"))
{
send_cmd(handle, 2, 0, 0);
}
else if (strneq(argv[i], "manual", 6))
{
arg = getarg(argv[i] + 6, 3, 0, 15);
send_cmd(handle, 8, arg, 0);
// 3=middle, 4=back, 5=forw, 6=find, 7=wheel-left, 8=wheel-right
// 9=sidewheel-forw, 11=sidewheel-back, 13=sidewheel-press
// 0+1+2+10+12+14+15=ignore
}
else if (strneq(argv[i], "auto", 4))
{
arg = getarg(argv[i] + 4, 5, 1, 47);
send_cmd(handle, 5, arg, arg); // up, down
}
else
fatal("unknown option `%s'", argv[i]);
}
int
main(int argc, char **argv)
{
int handle;
if (argc < 2 ||
(argc > 1 && (streq(argv[1], "-h") || streq(argv[1], "--help"))))
{
printf("Revoco v0.1 - Change the wheel behaviour of "
"Logitech's MX-Revolution mouse.\n");
printf("Usage:\n");
printf(" revoco free free spinning mode\n");
printf(" revoco click click-to-click mode\n");
printf(" revoco manual[=button] manual mode change via button\n");
printf(" revoco auto[=speed] automatic mode change (0<speed<48)\n");
exit(0);
}
handle = open_dev();
if (handle == -1)
fatal("No Logitech MX-Revolution (%04x:%04x) found.",
LOGITECH, MX_REVOLUTION);
configure(handle, argc, argv);
close_dev(handle);
exit(0);
}
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