125 lines
2.8 KiB
C
125 lines
2.8 KiB
C
/*
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* Copyright 2007, Intel Corporation
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*
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* This file is part of PowerTOP
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*
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* This program file is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program in a file named COPYING; if not, write to the
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* Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301 USA
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*
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* Authors:
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* Arjan van de Ven <arjan@linux.intel.com>
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*/
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#include <unistd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdint.h>
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#include <sys/types.h>
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#include <dirent.h>
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#include "powertop.h"
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void activate_usb_autosuspend(void)
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{
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DIR *dir;
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struct dirent *dirent;
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FILE *file;
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char filename[PATH_MAX];
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dir = opendir("/sys/bus/usb/devices");
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if (!dir)
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return;
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while ((dirent = readdir(dir))) {
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if (dirent->d_name[0]=='.')
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continue;
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sprintf(filename, "/sys/bus/usb/devices/%s/power/autosuspend", dirent->d_name);
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file = fopen(filename, "w");
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if (!file)
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continue;
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fprintf(file, "0\n");
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fclose(file);
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sprintf(filename, "/sys/bus/usb/devices/%s/power/level", dirent->d_name);
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file = fopen(filename, "w");
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if (!file)
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continue;
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fprintf(file, "auto\n");
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fclose(file);
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}
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closedir(dir);
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}
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void suggest_usb_autosuspend(void)
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{
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DIR *dir;
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struct dirent *dirent;
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FILE *file;
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char filename[PATH_MAX];
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char line[1024];
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int need_hint = 0;
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dir = opendir("/sys/bus/usb/devices");
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if (!dir)
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return;
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while ((dirent = readdir(dir))) {
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if (dirent->d_name[0]=='.')
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continue;
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sprintf(filename, "/sys/bus/usb/devices/%s/power/autosuspend", dirent->d_name);
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file = fopen(filename, "r");
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if (!file)
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continue;
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memset(line, 0, 1024);
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if (fgets(line, 1023,file)==NULL) {
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fclose(file);
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continue;
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}
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if (strtoll(line, NULL,10)<0)
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need_hint = 1;
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fclose(file);
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sprintf(filename, "/sys/bus/usb/devices/%s/power/level", dirent->d_name);
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file = fopen(filename, "r");
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if (!file)
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continue;
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memset(line, 0, 1024);
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if (fgets(line, 1023,file)==NULL) {
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fclose(file);
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continue;
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}
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if (strstr(line, "on"))
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need_hint = 1;
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fclose(file);
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}
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closedir(dir);
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if (need_hint) {
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add_suggestion(_("Suggestion: Enable USB autosuspend by pressing the U key or adding \n"
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"usbcore.autosuspend=1 to the kernel command line in the grub config"
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),
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45, 'U', _(" U - Enable USB suspend "), activate_usb_autosuspend);
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}
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}
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