151 lines
3.4 KiB
C
151 lines
3.4 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 <sys/types.h>
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#include <sys/socket.h>
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#include <sys/ioctl.h>
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#include <errno.h>
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#include "powertop.h"
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/* structure definitions copied from include/net/bluetooth/hci.h from the 2.6.20 kernel */
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#define HCIGETDEVINFO _IOR('H', 211, int)
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#define BTPROTO_HCI 1
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#define __u16 uint16_t
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#define __u8 uint8_t
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#define __u32 uint32_t
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typedef struct {
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__u8 b[6];
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} __attribute__((packed)) bdaddr_t;
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struct hci_dev_stats {
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__u32 err_rx;
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__u32 err_tx;
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__u32 cmd_tx;
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__u32 evt_rx;
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__u32 acl_tx;
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__u32 acl_rx;
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__u32 sco_tx;
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__u32 sco_rx;
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__u32 byte_rx;
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__u32 byte_tx;
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};
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struct hci_dev_info {
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__u16 dev_id;
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char name[8];
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bdaddr_t bdaddr;
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__u32 flags;
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__u8 type;
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__u8 features[8];
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__u32 pkt_type;
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__u32 link_policy;
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__u32 link_mode;
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__u16 acl_mtu;
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__u16 acl_pkts;
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__u16 sco_mtu;
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__u16 sco_pkts;
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struct hci_dev_stats stat;
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};
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static int previous_bytes = -1;
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void turn_bluetooth_off(void)
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{
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system("/usr/sbin/hciconfig hci0 down &> /dev/null");
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system("/sbin/rmmod hci_usb &> /dev/null");
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}
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void suggest_bluetooth_off(void)
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{
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struct hci_dev_info devinfo;
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FILE *file;
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int fd;
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int ret;
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int thisbytes = 0;
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/* first check if /sys/modules/bluetooth exists, if not, don't probe bluetooth because
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it would trigger an autoload */
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if (access("/sys/module/bluetooth",F_OK))
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return;
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fd = socket(AF_BLUETOOTH, SOCK_RAW, BTPROTO_HCI);
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if (fd < 0)
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return;
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memset(&devinfo, 0, sizeof(devinfo));
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strcpy(devinfo.name, "hci0");
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ret = ioctl(fd, HCIGETDEVINFO, (void *) &devinfo);
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if (ret < 0)
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goto out;
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if ( (devinfo.flags & 1) == 0 &&
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access("/sys/module/hci_usb",F_OK)) /* interface down already */
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goto out;
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thisbytes += devinfo.stat.byte_rx;
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thisbytes += devinfo.stat.byte_tx;
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if (thisbytes != previous_bytes)
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goto out;
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/* now, also check for active connections */
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file = popen("/usr/bin/hcitool con 2> /dev/null", "r");
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if (file) {
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char line[2048];
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/* first line is standard header */
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fgets(line,2048,file);
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memset(line, 0, 2048);
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fgets(line, 2047, file);
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pclose(file);
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if (strlen(line)>0)
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goto out;
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}
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add_suggestion( _("Suggestion: Disable the unused bluetooth interface with the following command:\n"
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" hciconfig hci0 down ; rmmod hci_usb\n"
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"Bluetooth is a radio and consumes quite some power, and keeps USB busy as well.\n"), 40, 'B' , _(" B - Turn Bluetooth off "), turn_bluetooth_off);
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out:
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previous_bytes = thisbytes;
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close(fd);
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return;
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}
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