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
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
|
/*
* Input layer to RF Kill interface connector
*
* Copyright (c) 2007 Dmitry Torokhov
*/
/*
* 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.
*/
#include <linux/module.h>
#include <linux/input.h>
#include <linux/slab.h>
#include <linux/workqueue.h>
#include <linux/init.h>
#include <linux/rfkill.h>
#include "rfkill-input.h"
MODULE_AUTHOR("Dmitry Torokhov <dtor@mail.ru>");
MODULE_DESCRIPTION("Input layer to RF switch connector");
MODULE_LICENSE("GPL");
struct rfkill_task {
struct work_struct work;
enum rfkill_type type;
struct mutex mutex; /* ensures that task is serialized */
spinlock_t lock; /* for accessing last and desired state */
unsigned long last; /* last schedule */
enum rfkill_state desired_state; /* on/off */
};
static void rfkill_task_handler(struct work_struct *work)
{
struct rfkill_task *task = container_of(work, struct rfkill_task, work);
mutex_lock(&task->mutex);
rfkill_switch_all(task->type, task->desired_state);
mutex_unlock(&task->mutex);
}
static void rfkill_schedule_set(struct rfkill_task *task,
enum rfkill_state desired_state)
{
unsigned long flags;
spin_lock_irqsave(&task->lock, flags);
if (time_after(jiffies, task->last + msecs_to_jiffies(200))) {
task->desired_state = desired_state;
task->last = jiffies;
schedule_work(&task->work);
}
spin_unlock_irqrestore(&task->lock, flags);
}
static void rfkill_schedule_toggle(struct rfkill_task *task)
{
unsigned long flags;
spin_lock_irqsave(&task->lock, flags);
if (time_after(jiffies, task->last + msecs_to_jiffies(200))) {
task->desired_state = !task->desired_state;
task->last = jiffies;
schedule_work(&task->work);
}
spin_unlock_irqrestore(&task->lock, flags);
}
#define DEFINE_RFKILL_TASK(n, t) \
struct rfkill_task n = { \
.work = __WORK_INITIALIZER(n.work, \
rfkill_task_handler), \
.type = t, \
.mutex = __MUTEX_INITIALIZER(n.mutex), \
.lock = __SPIN_LOCK_UNLOCKED(n.lock), \
.desired_state = RFKILL_STATE_ON, \
}
static DEFINE_RFKILL_TASK(rfkill_wlan, RFKILL_TYPE_WLAN);
static DEFINE_RFKILL_TASK(rfkill_bt, RFKILL_TYPE_BLUETOOTH);
static DEFINE_RFKILL_TASK(rfkill_uwb, RFKILL_TYPE_UWB);
static DEFINE_RFKILL_TASK(rfkill_wimax, RFKILL_TYPE_WIMAX);
static DEFINE_RFKILL_TASK(rfkill_wwan, RFKILL_TYPE_WWAN);
static void rfkill_event(struct input_handle *handle, unsigned int type,
unsigned int code, int data)
{
if (type == EV_KEY && data == 1) {
switch (code) {
case KEY_WLAN:
rfkill_schedule_toggle(&rfkill_wlan);
break;
case KEY_BLUETOOTH:
rfkill_schedule_toggle(&rfkill_bt);
break;
case KEY_UWB:
rfkill_schedule_toggle(&rfkill_uwb);
break;
case KEY_WIMAX:
rfkill_schedule_toggle(&rfkill_wimax);
break;
default:
break;
}
} else if (type == EV_SW) {
switch (code) {
case SW_RFKILL_ALL:
/* EVERY radio type. data != 0 means radios ON */
rfkill_schedule_set(&rfkill_wwan,
(data)? RFKILL_STATE_ON:
RFKILL_STATE_OFF);
rfkill_schedule_set(&rfkill_wimax,
(data)? RFKILL_STATE_ON:
RFKILL_STATE_OFF);
rfkill_schedule_set(&rfkill_uwb,
(data)? RFKILL_STATE_ON:
RFKILL_STATE_OFF);
rfkill_schedule_set(&rfkill_bt,
(data)? RFKILL_STATE_ON:
RFKILL_STATE_OFF);
rfkill_schedule_set(&rfkill_wlan,
(data)? RFKILL_STATE_ON:
RFKILL_STATE_OFF);
break;
default:
break;
}
}
}
static int rfkill_connect(struct input_handler *handler, struct input_dev *dev,
const struct input_device_id *id)
{
struct input_handle *handle;
int error;
handle = kzalloc(sizeof(struct input_handle), GFP_KERNEL);
if (!handle)
return -ENOMEM;
handle->dev = dev;
handle->handler = handler;
handle->name = "rfkill";
error = input_register_handle(handle);
if (error)
goto err_free_handle;
error = input_open_device(handle);
if (error)
goto err_unregister_handle;
return 0;
err_unregister_handle:
input_unregister_handle(handle);
err_free_handle:
kfree(handle);
return error;
}
static void rfkill_disconnect(struct input_handle *handle)
{
input_close_device(handle);
input_unregister_handle(handle);
kfree(handle);
}
static const struct input_device_id rfkill_ids[] = {
{
.flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT,
.evbit = { BIT_MASK(EV_KEY) },
.keybit = { [BIT_WORD(KEY_WLAN)] = BIT_MASK(KEY_WLAN) },
},
{
.flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT,
.evbit = { BIT_MASK(EV_KEY) },
.keybit = { [BIT_WORD(KEY_BLUETOOTH)] = BIT_MASK(KEY_BLUETOOTH) },
},
{
.flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT,
.evbit = { BIT_MASK(EV_KEY) },
.keybit = { [BIT_WORD(KEY_UWB)] = BIT_MASK(KEY_UWB) },
},
{
.flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT,
.evbit = { BIT_MASK(EV_KEY) },
.keybit = { [BIT_WORD(KEY_WIMAX)] = BIT_MASK(KEY_WIMAX) },
},
{
.flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_SWBIT,
.evbit = { BIT(EV_SW) },
.swbit = { [BIT_WORD(SW_RFKILL_ALL)] = BIT_MASK(SW_RFKILL_ALL) },
},
{ }
};
static struct input_handler rfkill_handler = {
.event = rfkill_event,
.connect = rfkill_connect,
.disconnect = rfkill_disconnect,
.name = "rfkill",
.id_table = rfkill_ids,
};
static int __init rfkill_handler_init(void)
{
return input_register_handler(&rfkill_handler);
}
static void __exit rfkill_handler_exit(void)
{
input_unregister_handler(&rfkill_handler);
flush_scheduled_work();
}
module_init(rfkill_handler_init);
module_exit(rfkill_handler_exit);
|
