1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
|
/*
* Toshiba Bluetooth Enable Driver
*
* Copyright (C) 2009 Jes Sorensen <Jes.Sorensen@gmail.com>
*
* Thanks to Matthew Garrett for background info on ACPI innards which
* normal people aren't meant to understand :-)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Note the Toshiba Bluetooth RFKill switch seems to be a strange
* fish. It only provides a BT event when the switch is flipped to
* the 'on' position. When flipping it to 'off', the USB device is
* simply pulled away underneath us, without any BT event being
* delivered.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>
MODULE_AUTHOR("Jes Sorensen <Jes.Sorensen@gmail.com>");
MODULE_DESCRIPTION("Toshiba Laptop ACPI Bluetooth Enable Driver");
MODULE_LICENSE("GPL");
static int toshiba_bt_rfkill_add(struct acpi_device *device);
static int toshiba_bt_rfkill_remove(struct acpi_device *device, int type);
static void toshiba_bt_rfkill_notify(struct acpi_device *device, u32 event);
static int toshiba_bt_resume(struct acpi_device *device);
static const struct acpi_device_id bt_device_ids[] = {
{ "TOS6205", 0},
{ "", 0},
};
MODULE_DEVICE_TABLE(acpi, bt_device_ids);
static struct acpi_driver toshiba_bt_rfkill_driver = {
.name = "Toshiba BT",
.class = "Toshiba",
.ids = bt_device_ids,
.ops = {
.add = toshiba_bt_rfkill_add,
.remove = toshiba_bt_rfkill_remove,
.notify = toshiba_bt_rfkill_notify,
.resume = toshiba_bt_resume,
},
.owner = THIS_MODULE,
};
static int toshiba_bluetooth_enable(acpi_handle handle)
{
acpi_status res1, res2;
u64 result;
/*
* Query ACPI to verify RFKill switch is set to 'on'.
* If not, we return silently, no need to report it as
* an error.
*/
res1 = acpi_evaluate_integer(handle, "BTST", NULL, &result);
if (ACPI_FAILURE(res1))
return res1;
if (!(result & 0x01))
return 0;
printk(KERN_INFO "toshiba_bluetooth: Re-enabling Toshiba Bluetooth\n");
res1 = acpi_evaluate_object(handle, "AUSB", NULL, NULL);
res2 = acpi_evaluate_object(handle, "BTPO", NULL, NULL);
if (!ACPI_FAILURE(res1) || !ACPI_FAILURE(res2))
return 0;
printk(KERN_WARNING "toshiba_bluetooth: Failed to re-enable "
"Toshiba Bluetooth\n");
return -ENODEV;
}
static void toshiba_bt_rfkill_notify(struct acpi_device *device, u32 event)
{
toshiba_bluetooth_enable(device->handle);
}
static int toshiba_bt_resume(struct acpi_device *device)
{
return toshiba_bluetooth_enable(device->handle);
}
static int toshiba_bt_rfkill_add(struct acpi_device *device)
{
acpi_status status;
u64 bt_present;
int result = -ENODEV;
/*
* Some Toshiba laptops may have a fake TOS6205 device in
* their ACPI BIOS, so query the _STA method to see if there
* is really anything there, before trying to enable it.
*/
status = acpi_evaluate_integer(device->handle, "_STA", NULL,
&bt_present);
if (!ACPI_FAILURE(status) && bt_present) {
printk(KERN_INFO "Detected Toshiba ACPI Bluetooth device - "
"installing RFKill handler\n");
result = toshiba_bluetooth_enable(device->handle);
}
return result;
}
static int __init toshiba_bt_rfkill_init(void)
{
int result;
result = acpi_bus_register_driver(&toshiba_bt_rfkill_driver);
if (result < 0) {
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
"Error registering driver\n"));
return result;
}
return 0;
}
static int toshiba_bt_rfkill_remove(struct acpi_device *device, int type)
{
/* clean up */
return 0;
}
static void __exit toshiba_bt_rfkill_exit(void)
{
acpi_bus_unregister_driver(&toshiba_bt_rfkill_driver);
}
module_init(toshiba_bt_rfkill_init);
module_exit(toshiba_bt_rfkill_exit);
|
