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