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/*
* Copyright © 2015 Red Hat, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <libudev.h>
#include "libinput-util.h"
#if HAVE_LIBWACOM_GET_PAIRED_DEVICE
#include <libwacom/libwacom.h>
static void
wacom_handle_paired(struct udev_device *device,
int *vendor_id,
int *product_id)
{
WacomDeviceDatabase *db = NULL;
WacomDevice *tablet = NULL;
const WacomMatch *paired;
db = libwacom_database_new();
if (!db)
goto out;
tablet = libwacom_new_from_usbid(db, *vendor_id, *product_id, NULL);
if (!tablet)
goto out;
paired = libwacom_get_paired_device(tablet);
if (!paired)
goto out;
*vendor_id = libwacom_match_get_vendor_id(paired);
*product_id = libwacom_match_get_product_id(paired);
out:
if (tablet)
libwacom_destroy(tablet);
if (db)
libwacom_database_destroy(db);
}
#endif
static int
find_tree_distance(struct udev_device *a, struct udev_device *b)
{
struct udev_device *ancestor_a = a;
int dist_a = 0;
while (ancestor_a != NULL) {
const char *path_a = udev_device_get_syspath(ancestor_a);
struct udev_device *ancestor_b = b;
int dist_b = 0;
while (ancestor_b != NULL) {
const char *path_b = udev_device_get_syspath(ancestor_b);
if (streq(path_a, path_b))
return dist_a + dist_b;
dist_b++;
ancestor_b = udev_device_get_parent(ancestor_b);
}
dist_a++;
ancestor_a = udev_device_get_parent(ancestor_a);
}
return -1;
}
static void
wacom_handle_ekr(struct udev_device *device,
int *vendor_id,
int *product_id)
{
struct udev *udev;
struct udev_enumerate *e;
struct udev_list_entry *entry = NULL;
int best_dist = -1;
udev = udev_device_get_udev(device);
e = udev_enumerate_new(udev);
udev_enumerate_add_match_subsystem(e, "input");
udev_enumerate_add_match_sysname(e, "input*");
udev_enumerate_scan_devices(e);
udev_list_entry_foreach(entry, udev_enumerate_get_list_entry(e)) {
struct udev_device *d;
const char *path;
const char *pidstr, *vidstr;
int pid, vid, dist;
/* Find and use the closest Wacom device on the system,
* relying on wacom_handle_paired() to fix our ID later
* if needed.
*/
path = udev_list_entry_get_name(entry);
d = udev_device_new_from_syspath(udev, path);
if (!d)
continue;
vidstr = udev_device_get_property_value(d, "ID_VENDOR_ID");
pidstr = udev_device_get_property_value(d, "ID_MODEL_ID");
if (vidstr && pidstr &&
safe_atoi_base(vidstr, &vid, 16) &&
safe_atoi_base(pidstr, &pid, 16) &&
vid == VENDOR_ID_WACOM &&
pid != PRODUCT_ID_WACOM_EKR) {
dist = find_tree_distance(device, d);
if (dist > 0 && (dist < best_dist || best_dist < 0)) {
*vendor_id = vid;
*product_id = pid;
best_dist = dist;
}
}
udev_device_unref(d);
}
udev_enumerate_unref(e);
}
int main(int argc, char **argv)
{
int rc = 1;
struct udev *udev = NULL;
struct udev_device *device = NULL;
const char *syspath,
*phys = NULL;
const char *product;
int bustype, vendor_id, product_id, version;
char group[1024];
char *str;
if (argc != 2)
return 1;
syspath = argv[1];
udev = udev_new();
if (!udev)
goto out;
device = udev_device_new_from_syspath(udev, syspath);
if (!device)
goto out;
/* Find the first parent with ATTRS{phys} set. For tablets that
* value looks like usb-0000:00:14.0-1/input1. Drop the /input1
* bit and use the remainder as device group identifier */
while (device != NULL) {
struct udev_device *parent;
phys = udev_device_get_sysattr_value(device, "phys");
if (phys)
break;
parent = udev_device_get_parent(device);
udev_device_ref(parent);
udev_device_unref(device);
device = parent;
}
if (!phys)
goto out;
/* udev sets PRODUCT on the same device we find PHYS on, let's rely
on that*/
product = udev_device_get_property_value(device, "PRODUCT");
if (!product)
product = "00/00/00/00";
if (sscanf(product,
"%x/%x/%x/%x",
&bustype,
&vendor_id,
&product_id,
&version) != 4) {
snprintf(group, sizeof(group), "%s:%s", product, phys);
} else {
#if HAVE_LIBWACOM_GET_PAIRED_DEVICE
if (vendor_id == VENDOR_ID_WACOM) {
if (product_id == PRODUCT_ID_WACOM_EKR)
wacom_handle_ekr(device,
&vendor_id,
&product_id);
/* This is called for the EKR as well */
wacom_handle_paired(device,
&vendor_id,
&product_id);
}
#endif
snprintf(group,
sizeof(group),
"%x/%x/%x:%s",
bustype,
vendor_id,
product_id,
phys);
}
str = strstr(group, "/input");
if (str)
*str = '\0';
/* Cintiq 22HD Touch has
usb-0000:00:14.0-6.3.1/input0 for the touch
usb-0000:00:14.0-6.3.0/input0 for the pen
Check if there's a . after the last -, if so, cut off the string
there.
*/
str = strrchr(group, '.');
if (str && str > strrchr(group, '-'))
*str = '\0';
printf("%s\n", group);
rc = 0;
out:
if (device)
udev_device_unref(device);
if (udev)
udev_unref(udev);
return rc;
}
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