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/*
* Copyright (C) 2010 Michael Buesch <m@bues.ch>
*
* 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.
*/
#include "devicelock_n810.h"
#include "util.h"
#include "log.h"
#include "main.h"
#include <unistd.h>
#include <fcntl.h>
#include <signal.h>
#define KB_BASEPATH "/devices/platform/i2c_omap.2/i2c-2/2-0045"
#define TS_BASEPATH "/devices/platform/omap2_mcspi.1/spi1.0"
#define INPUT_BASEPATH "/devices/virtual/input"
#define GPIOSW_BASEPATH "/devices/platform/gpio-switch"
static void devicelock_n810_toggle(struct devicelock *s)
{
struct devicelock_n810 *sn = container_of(s, struct devicelock_n810, devicelock);
int err, lock;
lock = !(backend.backlight->screen_is_locked(backend.backlight));
logdebug("devicelock: %s the device\n", lock ? "Locking" : "Unlocking");
if (lock)
autodim_suspend(backend.autodim);
/* Set backlight lock state */
err = backlight_screen_lock(backend.backlight, lock);
if (err)
logerr("Failed to set backlight lock state\n");
/* Set touchscreen lock state */
err = file_write_int(sn->ts_disable_file, lock, 10);
if (err)
logerr("Failed to write touchscreen disable file\n");
/* Set keyboard lock state */
err = file_write_int(sn->kb_disable_file, lock, 10);
if (err)
logerr("Failed to write keyboard disable file\n");
if (!lock)
autodim_resume(backend.autodim);
}
static void devicelock_n810_event(struct devicelock *s)
{
struct devicelock_n810 *sn = container_of(s, struct devicelock_n810, devicelock);
char buf[32], *bufp;
int count, switch_state;
count = file_read_string(sn->kb_lock_state_file, buf, sizeof(buf));
if (count <= 0)
return;
bufp = string_strip(buf);
if (strcmp(bufp, "open") == 0) {
switch_state = 0;
} else if (strcmp(bufp, "closed") == 0) {
switch_state = 1;
} else {
logerr("devicelock: Invalid state\n");
return;
}
if (switch_state == sn->switch_state)
return;
sn->switch_state = switch_state;
if (switch_state)
devicelock_n810_toggle(s);
}
static void devicelock_n810_destroy(struct devicelock *s)
{
struct devicelock_n810 *sn = container_of(s, struct devicelock_n810, devicelock);
close(sn->kb_lock_evdev_fd);
file_close(sn->kb_lock_state_file);
file_close(sn->kb_disable_file);
file_close(sn->ts_disable_file);
free(sn);
}
static struct devicelock * devicelock_n810_probe(void)
{
struct devicelock_n810 *sn;
struct fileaccess *ts_disable = NULL;
struct fileaccess *kb_disable = NULL;
struct fileaccess *kb_lock_state = NULL;
struct fileaccess *file;
int kb_lock_evdev = -1;
int kb_lock_evdev_fd = -1;
struct dir_entry *dir_entry;
LIST_HEAD(dir_entries);
int err, count;
unsigned int i;
char buf[PATH_MAX + 1];
ts_disable = sysfs_file_open(O_RDWR, TS_BASEPATH "/disable_ts");
if (!ts_disable)
goto err_close;
kb_disable = sysfs_file_open(O_RDWR, KB_BASEPATH "/disable_kp");
if (!kb_disable)
goto err_close;
kb_lock_state = sysfs_file_open(O_RDONLY, GPIOSW_BASEPATH "/kb_lock/state");
if (!kb_lock_state)
goto err_close;
count = list_sysfs_directory(&dir_entries, INPUT_BASEPATH);
if (count <= 0)
goto err_close;
list_for_each_entry(dir_entry, &dir_entries, list) {
if (sscanf(dir_entry->name, "input%u", &i) != 1)
continue;
file = sysfs_file_open(O_RDONLY, "%s/%s/name",
INPUT_BASEPATH, dir_entry->name);
if (!file)
continue;
count = file_read_string(file, buf, sizeof(buf));
file_close(file);
if (count <= 0)
continue;
if (strcmp(string_strip(buf), "kb_lock") == 0) {
kb_lock_evdev = i;
break;
}
}
dir_entries_free(&dir_entries);
if (kb_lock_evdev < 0)
goto err_close;
snprintf(buf, sizeof(buf), "/dev/input/event%u", kb_lock_evdev);
kb_lock_evdev_fd = open(buf, O_RDONLY);
if (kb_lock_evdev_fd < 0)
goto err_close;
err = fcntl(kb_lock_evdev_fd, F_SETFL, O_ASYNC | O_NONBLOCK);
err |= fcntl(kb_lock_evdev_fd, F_SETSIG, SIGUSR2);
err |= fcntl(kb_lock_evdev_fd, F_SETOWN, getpid());
if (err)
goto err_close;
sn = zalloc(sizeof(*sn));
if (!sn)
goto err_close;
sn->kb_lock_evdev_fd = kb_lock_evdev_fd;
sn->kb_lock_state_file = kb_lock_state;
sn->ts_disable_file = ts_disable;
sn->kb_disable_file = kb_disable;
devicelock_init(&sn->devicelock, "n810");
sn->devicelock.event = devicelock_n810_event;
sn->devicelock.destroy = devicelock_n810_destroy;
logdebug("Screenlock toggle on %s\n", buf);
return &sn->devicelock;
err_close:
if (kb_lock_evdev_fd)
close(kb_lock_evdev_fd);
file_close(kb_lock_state);
file_close(ts_disable);
file_close(kb_disable);
return NULL;
}
DEVICELOCK_PROBE(n810, devicelock_n810_probe);
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