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/*
* Copyright (C) 2002-2008 Mattia Dongili <malattia@linux.it>
* George Staikos <staikos@0wned.org>
*
* 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <dirent.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "cpufreqd_plugin.h"
#include "cpufreqd_acpi.h"
#include "cpufreqd_acpi_ac.h"
#define POWER_SUPPLY "power_supply"
#define AC_TYPE "Mains"
#define AC_ONLINE "online"
#define PLUGGED 1
#define UNPLUGGED 0
static struct sysfs_attribute *mains[64];
static int ac_state;
static int ac_dir_num;
static int mains_callback(struct sysfs_class_device *cdev) {
struct sysfs_attribute *attr = get_class_device_attribute(cdev,
AC_ONLINE);
if (attr) {
/* success */
mains[ac_dir_num] = attr;
ac_dir_num++;
}
/* we don't care about the class_device
* returning 1 will force find_class_device
* to close it
*/
return 1;
}
/* static int acpi_ac_init(void)
*
* test if AC dirs are present
*/
short int acpi_ac_init(void) {
find_class_device(POWER_SUPPLY, AC_TYPE, mains_callback);
if (ac_dir_num <= 0) {
clog(LOG_INFO, "No AC adapters found\n");
return -1;
}
return 0;
}
short int acpi_ac_exit(void) {
while (--ac_dir_num >= 0)
put_attribute(mains[ac_dir_num]);
clog(LOG_INFO, "exited.\n");
return 0;
}
/* static int acpi_ac_update(void)
*
* reads temperature valuse ant compute a medium value
*/
int acpi_ac_update(void) {
int value;
int i = 0;
ac_state = UNPLUGGED;
clog(LOG_DEBUG, "called\n");
for (i = 0; i < ac_dir_num; i++) {
/* check power_supply type */
if (read_int(mains[i], &value))
continue;
clog(LOG_DEBUG, "read %s:%d\n", mains[i]->path, value);
ac_state |= value ? PLUGGED : UNPLUGGED;
}
clog(LOG_INFO, "ac_adapter is %s\n",
ac_state==PLUGGED ? "on-line" : "off-line");
return 0;
}
/*
* parse the 'ac' keywork
*/
int acpi_ac_parse(const char *ev, void **obj) {
int *ret = malloc(sizeof(int));
if (ret == NULL) {
clog(LOG_ERR, "couldn't make enough room for ac_status (%s)\n",
strerror(errno));
return -1;
}
*ret = 0;
clog(LOG_DEBUG, "called with: %s\n", ev);
if (strncmp(ev, "on", 2) == 0) {
*ret = PLUGGED;
} else if (strncmp(ev, "off", 3) == 0) {
*ret = UNPLUGGED;
} else {
clog(LOG_ERR, "couldn't parse %s\n", ev);
free(ret);
return -1;
}
clog(LOG_INFO, "parsed: %s\n", *ret==PLUGGED ? "on" : "off");
*obj = ret;
return 0;
}
/*
* evaluate the 'ac' keywork
*/
int acpi_ac_evaluate(const void *s) {
const int *ac = (const int *)s;
clog(LOG_DEBUG, "called: %s [%s]\n",
*ac==PLUGGED ? "on" : "off", ac_state==PLUGGED ? "on" : "off");
return (*ac == ac_state) ? MATCH : DONT_MATCH;
}
#if 0
static struct cpufreqd_keyword kw[] = {
{ .word = "ac", .parse = &acpi_ac_parse, .evaluate = &acpi_ac_evaluate },
{ .word = NULL, .parse = NULL, .evaluate = NULL, .free = NULL }
};
static struct cpufreqd_plugin acpi_ac = {
.plugin_name = "acpi_ac_plugin", /* plugin_name */
.keywords = kw, /* config_keywords */
.plugin_init = &acpi_ac_init, /* plugin_init */
.plugin_exit = &acpi_ac_exit, /* plugin_exit */
.plugin_update = &acpi_ac_update /* plugin_update */
};
struct cpufreqd_plugin *create_plugin (void) {
return &acpi_ac;
}
#endif
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