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/*
* olpc-kbdshim.c -- special touchpad and keyboard support for XO:
* - mouse-based scrolling use the XO grab keys
* - touchpad and dpad rotation (to match screen rotation)
* - user activity monitoring
*
* Copyright (C) 2009,2010,2011, Paul G. Fox, inspired in places
* by code from mouseemu, by Colin Leroy and others.
*
* 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 2 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 <errno.h>
#include <fcntl.h>
#include <sched.h>
#include <signal.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <syslog.h>
#include <time.h>
#include <unistd.h>
#include <linux/input.h>
#include "common.h"
/* are we in user-idle state? */
static int idleness;
static int wasidle;
/* input event devices */
static int kbd_fd = -1;
static int tpad_fd = -1;
/* bit array ops */
#define bits2bytes(x) ((((x)-1)/8)+1)
#define test_bit(bit, array) ( array[(bit)/8] & (1 << (bit)%8) )
int
setup_input()
{
int i;
int dfd;
char devname[128];
unsigned char bit[bits2bytes(EV_MAX)];
struct input_id id;
for (i = 0; i < EVENTDEVICES; i++) {
snprintf(devname, sizeof(devname), "/dev/input/event%d", i);
if ((dfd = open(devname, O_RDONLY)) < 0)
continue;
if (ioctl(dfd, EVIOCGID, &id) < 0) {
report("failed ioctl EVIOCGID on %d", i);
close(dfd);
continue;
}
if (ioctl(dfd, EVIOCGBIT(0, EV_MAX), bit) < 0) {
report("failed ioctl EVIOCGBIT on %d", i);
close(dfd);
continue;
}
if (kbd_fd < 0 &&
test_bit(EV_KEY, bit) &&
test_bit(EV_REP, bit) &&
is_local_kbd(&id)) {
kbd_fd = dfd;
if (ioctl(kbd_fd, EVIOCGRAB, 1) < 0)
die("ioctl EVIOCGRAB on keyboard");
report("found keyboard %s (%02x:%02x:%02x)", devname,
id.bustype, id.vendor, id.product);
continue;
}
if (tpad_fd < 0 &&
test_bit(EV_REL, bit) &&
is_local_tpad(&id)) {
tpad_fd = dfd;
if (ioctl(tpad_fd, EVIOCGRAB, 1) < 0)
die("ioctl EVIOCGRAB on touchpad");
report("found touchpad %s (%02x:%02x:%02x)", devname,
id.bustype, id.vendor, id.product);
continue;
}
close(dfd);
}
if (kbd_fd == -1)
report("didn't find keyboard");
if (tpad_fd == -1)
report("didn't find touchpad");
return (kbd_fd >= 0 && tpad_fd >= 0);
}
static int
keyboard_event(void)
{
struct input_event ev[1];
if (read(kbd_fd, ev, sizeof(ev)) != sizeof(ev))
die("bad read from keyboard");
return keyboard_event_worker(ev, 1);
}
static void touchpad_event(void)
{
struct input_event ev[1];
if (read(tpad_fd, ev, sizeof(ev)) != sizeof(ev))
die("bad read from touchpad");
touchpad_event_worker(ev, 1);
}
static void
indicate_idleness(void)
{
static char useridle[] = "useridleX";
useridle[8] = idleness + '1';
if (idleness < MAXTIMERS) idleness++;
send_event(useridle);
wasidle = 1;
}
void
reinit_activity_monitor(void)
{
wasidle = 1;
idleness = 0;
}
static void
indicate_activity(void)
{
if (wasidle)
send_event("useractive");
reinit_activity_monitor();
wasidle = 0;
}
static void
get_command(void)
{
int n;
char command[128];
n = read(fifo_fd, command, sizeof(command)-1);
if (n < 1) {
if (n < 0)
die("read from rotation fifo");
deinit_fifo();
}
command[n] = '\0';
command_worker(command);
}
void
monitor_input(void)
{
fd_set inputs, errors;
int maxfd, r;
struct timeval tv;
struct timeval *tvp;
int pressed;
indicate_activity();
maxfd = MAX(fifo_fd, MAX(kbd_fd, tpad_fd));
while (1) {
FD_ZERO(&inputs);
FD_SET(kbd_fd, &inputs);
FD_SET(tpad_fd, &inputs);
if (fifo_fd >= 0) FD_SET(fifo_fd, &inputs);
FD_ZERO(&errors);
FD_SET(kbd_fd, &errors);
FD_SET(tpad_fd, &errors);
if (fifo_fd >= 0) FD_SET(fifo_fd, &errors);
if (idledeltas[idleness]) {
tv.tv_sec = idledeltas[idleness];
tv.tv_usec = 0;
tvp = &tv;
} else {
tvp = 0;
}
r = select(maxfd+1, &inputs, NULL, &errors, tvp);
if (r < 0)
die("select failed");
if (r == 0) {
indicate_idleness();
continue;
}
pressed = 0;
if (fifo_fd >= 0 && FD_ISSET(fifo_fd, &errors))
die("select reports error on rotation event fifo");
if (FD_ISSET(kbd_fd, &errors))
die("select reports error on keyboard");
if (FD_ISSET(tpad_fd, &errors))
die("select reports error on touchpad");
if (fifo_fd >= 0 && FD_ISSET(fifo_fd, &inputs))
get_command();
if (FD_ISSET(kbd_fd, &inputs))
pressed |= keyboard_event();
if (FD_ISSET(tpad_fd, &inputs)) {
touchpad_event();
pressed = 1;
}
if (pressed)
indicate_activity();
}
}
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