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/*
* Copyright 2007, Intel Corporation
*
* This file is part of PowerTOP
*
* This program file 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; version 2 of the License.
*
* 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 in a file named COPYING; if not, write to the
* Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA
*
* Authors:
* Arjan van de Ven <arjan@linux.intel.com>
*/
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <sys/types.h>
#include <dirent.h>
#include "powertop.h"
void activate_usb_autosuspend(void)
{
DIR *dir;
struct dirent *dirent;
FILE *file;
char filename[PATH_MAX];
int len;
char linkto[PATH_MAX];
dir = opendir("/sys/bus/usb/devices");
if (!dir)
return;
while ((dirent = readdir(dir))) {
if (dirent->d_name[0]=='.')
continue;
/* skip usb input devices */
sprintf(filename, "/sys/bus/usb/devices/%s/driver", dirent->d_name);
memset(linkto, 0, sizeof(linkto));
len = readlink(filename, linkto, sizeof(link) - 1);
if (strstr(linkto, "usbhid"))
continue;
sprintf(filename, "/sys/bus/usb/devices/%s/power/control", dirent->d_name);
file = fopen(filename, "w");
if (!file)
continue;
fprintf(file, "auto\n");
fclose(file);
}
closedir(dir);
}
void suggest_usb_autosuspend(void)
{
DIR *dir;
struct dirent *dirent;
FILE *file;
char filename[PATH_MAX];
char line[1024];
int len;
char linkto[PATH_MAX];
int need_hint = 0;
memset(linkto, 0, sizeof(linkto));
dir = opendir("/sys/bus/usb/devices");
if (!dir)
return;
while ((dirent = readdir(dir))) {
if (dirent->d_name[0]=='.')
continue;
/* skip usb input devices */
sprintf(filename, "/sys/bus/usb/devices/%s/driver", dirent->d_name);
len = readlink(filename, linkto, sizeof(link) - 1);
if (strstr(linkto, "usbhid"))
continue;
sprintf(filename, "/sys/bus/usb/devices/%s/power/control", dirent->d_name);
file = fopen(filename, "r");
if (!file)
continue;
memset(line, 0, 1024);
if (fgets(line, 1023,file)==NULL) {
fclose(file);
continue;
}
if (strstr(line, "on"))
need_hint = 1;
fclose(file);
}
closedir(dir);
if (need_hint) {
add_suggestion(_("Suggestion: Enable USB autosuspend for non-input devices by pressing the U key\n"
),
45, 'U', _(" U - Enable USB suspend "), activate_usb_autosuspend);
}
}
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