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tools: print out evdev override udev rule from touchpad edge detector

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We're starting to collect overrides for custom devices, making this easier for
users and saves us time. Once we measured everything, print out a
guesstimated udev rule and instructions on how to calculate the resolution.
Extra output now is:

	Touchpad size as listed by the kernel: 132x111mm
	Calculate resolution as:
		x axis: 6076/<width in mm>
		y axis: 5021/<height in mm>

	Suggested udev rule:
	# <Laptop model description goes here>
	evdev:input:b0005v05ACp030E*
	 EVDEV_ABS_01=-2694:2862:<x resolution>
	 EVDEV_ABS_02=-20:121:<y resolution>
	 EVDEV_ABS_35=-2694:2862:<x resolution>
	 EVDEV_ABS_36=-20:121:<y resolution>

The ABS_MT_ axes are only printed if the device have them, if the device isn't
bluetooth/usb we print the dmi modalias instead.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
This commit is contained in:
Peter Hutterer 2015-07-31 10:45:38 +10:00
parent 8b9c47a7cb
commit fa3c5622de
1 changed files with 81 additions and 1 deletions
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82
tools/touchpad-edge-detector.c
View file

@ -136,6 +136,85 @@ mainloop(struct libevdev *dev, struct dimensions *dim) {
return 0;
}
static inline void
pid_vid_matchstr(struct libevdev *dev, char *match, size_t sz)
{
snprintf(match, sz, "input:b%04Xv%04Xp%04X",
libevdev_get_id_bustype(dev),
libevdev_get_id_vendor(dev),
libevdev_get_id_product(dev));
}
static inline void
dmi_matchstr(struct libevdev *dev, char *match, size_t sz)
{
char modalias[PATH_MAX];
FILE *fp;
fp = fopen("/sys/class/dmi/id/modalias", "r");
if (!fp || fgets(modalias, sizeof(modalias), fp) == NULL) {
sprintf(match, "ERROR READING DMI MODALIAS");
if (fp)
fclose(fp);
return;
}
fclose(fp);
modalias[strlen(modalias) - 1] = '\0'; /* drop \n */
snprintf(match, sz, "name:%s:%s", libevdev_get_name(dev), modalias);
return;
}
static void
print_udev_override_rule(struct libevdev *dev, const struct dimensions *dim) {
const struct input_absinfo *x, *y;
char match[PATH_MAX];
int w, h;
x = libevdev_get_abs_info(dev, ABS_X);
y = libevdev_get_abs_info(dev, ABS_Y);
w = x->maximum - x->minimum;
h = y->maximum - y->minimum;
if (x->resolution && y->resolution) {
printf("Touchpad size as listed by the kernel: %dx%dmm\n",
w/x->resolution, h/y->resolution);
} else {
printf("Touchpad has no resolution, size unknown\n");
}
printf("Calculate resolution as:\n");
printf(" x axis: %d/<width in mm>\n", w);
printf(" y axis: %d/<height in mm>\n", h);
printf("\n");
printf("Suggested udev rule:\n");
switch(libevdev_get_id_bustype(dev)) {
case BUS_USB:
case BUS_BLUETOOTH:
pid_vid_matchstr(dev, match, sizeof(match));
break;
default:
dmi_matchstr(dev, match, sizeof(match));
break;
}
printf("# <Laptop model description goes here>\n"
"evdev:%s*\n"
" EVDEV_ABS_01=%d:%d:<x resolution>\n"
" EVDEV_ABS_02=%d:%d:<y resolution>\n",
match,
dim->left, dim->right,
dim->top, dim->bottom);
if (libevdev_has_event_code(dev, EV_ABS, ABS_MT_POSITION_X))
printf(" EVDEV_ABS_35=%d:%d:<x resolution>\n"
" EVDEV_ABS_36=%d:%d:<y resolution>\n",
dim->left, dim->right,
dim->top, dim->bottom);
}
int main (int argc, char **argv) {
int rc;
int fd;
@ -192,8 +271,9 @@ int main (int argc, char **argv) {
setbuf(stdout, NULL);
rc = mainloop(dev, &dim);
printf("\n\n");
printf("\n");
print_udev_override_rule(dev, &dim);
out:
libevdev_free(dev);