Commit | Line | Data |
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cf4328cd ID |
1 | /* |
2 | * Input layer to RF Kill interface connector | |
3 | * | |
4 | * Copyright (c) 2007 Dmitry Torokhov | |
5 | */ | |
6 | ||
7 | /* | |
8 | * This program is free software; you can redistribute it and/or modify it | |
9 | * under the terms of the GNU General Public License version 2 as published | |
10 | * by the Free Software Foundation. | |
11 | */ | |
12 | ||
13 | #include <linux/module.h> | |
14 | #include <linux/input.h> | |
15 | #include <linux/slab.h> | |
16 | #include <linux/workqueue.h> | |
17 | #include <linux/init.h> | |
18 | #include <linux/rfkill.h> | |
19 | ||
fe242cfd ID |
20 | #include "rfkill-input.h" |
21 | ||
cf4328cd ID |
22 | MODULE_AUTHOR("Dmitry Torokhov <dtor@mail.ru>"); |
23 | MODULE_DESCRIPTION("Input layer to RF switch connector"); | |
24 | MODULE_LICENSE("GPL"); | |
25 | ||
26 | struct rfkill_task { | |
27 | struct work_struct work; | |
28 | enum rfkill_type type; | |
29 | struct mutex mutex; /* ensures that task is serialized */ | |
30 | spinlock_t lock; /* for accessing last and desired state */ | |
31 | unsigned long last; /* last schedule */ | |
32 | enum rfkill_state desired_state; /* on/off */ | |
cf4328cd ID |
33 | }; |
34 | ||
35 | static void rfkill_task_handler(struct work_struct *work) | |
36 | { | |
37 | struct rfkill_task *task = container_of(work, struct rfkill_task, work); | |
cf4328cd ID |
38 | |
39 | mutex_lock(&task->mutex); | |
40 | ||
fbc6af2f | 41 | rfkill_switch_all(task->type, task->desired_state); |
cf4328cd ID |
42 | |
43 | mutex_unlock(&task->mutex); | |
44 | } | |
45 | ||
4081f00d HMH |
46 | static void rfkill_task_epo_handler(struct work_struct *work) |
47 | { | |
48 | rfkill_epo(); | |
49 | } | |
50 | ||
51 | static DECLARE_WORK(epo_work, rfkill_task_epo_handler); | |
52 | ||
53 | static void rfkill_schedule_epo(void) | |
54 | { | |
55 | schedule_work(&epo_work); | |
56 | } | |
57 | ||
28f089c1 HMH |
58 | static void rfkill_schedule_set(struct rfkill_task *task, |
59 | enum rfkill_state desired_state) | |
60 | { | |
61 | unsigned long flags; | |
62 | ||
4081f00d HMH |
63 | if (unlikely(work_pending(&epo_work))) |
64 | return; | |
65 | ||
28f089c1 HMH |
66 | spin_lock_irqsave(&task->lock, flags); |
67 | ||
68 | if (time_after(jiffies, task->last + msecs_to_jiffies(200))) { | |
69 | task->desired_state = desired_state; | |
70 | task->last = jiffies; | |
71 | schedule_work(&task->work); | |
72 | } | |
73 | ||
74 | spin_unlock_irqrestore(&task->lock, flags); | |
75 | } | |
76 | ||
cf4328cd ID |
77 | static void rfkill_schedule_toggle(struct rfkill_task *task) |
78 | { | |
e6c9116d | 79 | unsigned long flags; |
cf4328cd | 80 | |
4081f00d HMH |
81 | if (unlikely(work_pending(&epo_work))) |
82 | return; | |
83 | ||
cf4328cd ID |
84 | spin_lock_irqsave(&task->lock, flags); |
85 | ||
86 | if (time_after(jiffies, task->last + msecs_to_jiffies(200))) { | |
5005657c HMH |
87 | task->desired_state = |
88 | rfkill_state_complement(task->desired_state); | |
cf4328cd ID |
89 | task->last = jiffies; |
90 | schedule_work(&task->work); | |
91 | } | |
92 | ||
93 | spin_unlock_irqrestore(&task->lock, flags); | |
94 | } | |
95 | ||
5005657c HMH |
96 | #define DEFINE_RFKILL_TASK(n, t) \ |
97 | struct rfkill_task n = { \ | |
98 | .work = __WORK_INITIALIZER(n.work, \ | |
99 | rfkill_task_handler), \ | |
100 | .type = t, \ | |
101 | .mutex = __MUTEX_INITIALIZER(n.mutex), \ | |
102 | .lock = __SPIN_LOCK_UNLOCKED(n.lock), \ | |
103 | .desired_state = RFKILL_STATE_UNBLOCKED, \ | |
cf4328cd ID |
104 | } |
105 | ||
106 | static DEFINE_RFKILL_TASK(rfkill_wlan, RFKILL_TYPE_WLAN); | |
107 | static DEFINE_RFKILL_TASK(rfkill_bt, RFKILL_TYPE_BLUETOOTH); | |
e0665486 | 108 | static DEFINE_RFKILL_TASK(rfkill_uwb, RFKILL_TYPE_UWB); |
303d9bf6 | 109 | static DEFINE_RFKILL_TASK(rfkill_wimax, RFKILL_TYPE_WIMAX); |
477576a0 | 110 | static DEFINE_RFKILL_TASK(rfkill_wwan, RFKILL_TYPE_WWAN); |
cf4328cd ID |
111 | |
112 | static void rfkill_event(struct input_handle *handle, unsigned int type, | |
28f089c1 | 113 | unsigned int code, int data) |
cf4328cd | 114 | { |
28f089c1 | 115 | if (type == EV_KEY && data == 1) { |
cf4328cd ID |
116 | switch (code) { |
117 | case KEY_WLAN: | |
118 | rfkill_schedule_toggle(&rfkill_wlan); | |
119 | break; | |
120 | case KEY_BLUETOOTH: | |
121 | rfkill_schedule_toggle(&rfkill_bt); | |
122 | break; | |
e0665486 ID |
123 | case KEY_UWB: |
124 | rfkill_schedule_toggle(&rfkill_uwb); | |
125 | break; | |
303d9bf6 IPG |
126 | case KEY_WIMAX: |
127 | rfkill_schedule_toggle(&rfkill_wimax); | |
128 | break; | |
cf4328cd ID |
129 | default: |
130 | break; | |
131 | } | |
28f089c1 HMH |
132 | } else if (type == EV_SW) { |
133 | switch (code) { | |
134 | case SW_RFKILL_ALL: | |
135 | /* EVERY radio type. data != 0 means radios ON */ | |
4081f00d HMH |
136 | /* handle EPO (emergency power off) through shortcut */ |
137 | if (data) { | |
138 | rfkill_schedule_set(&rfkill_wwan, | |
5005657c | 139 | RFKILL_STATE_UNBLOCKED); |
4081f00d | 140 | rfkill_schedule_set(&rfkill_wimax, |
5005657c | 141 | RFKILL_STATE_UNBLOCKED); |
4081f00d | 142 | rfkill_schedule_set(&rfkill_uwb, |
5005657c | 143 | RFKILL_STATE_UNBLOCKED); |
4081f00d | 144 | rfkill_schedule_set(&rfkill_bt, |
5005657c | 145 | RFKILL_STATE_UNBLOCKED); |
4081f00d | 146 | rfkill_schedule_set(&rfkill_wlan, |
5005657c | 147 | RFKILL_STATE_UNBLOCKED); |
4081f00d HMH |
148 | } else |
149 | rfkill_schedule_epo(); | |
28f089c1 HMH |
150 | break; |
151 | default: | |
152 | break; | |
153 | } | |
cf4328cd ID |
154 | } |
155 | } | |
156 | ||
157 | static int rfkill_connect(struct input_handler *handler, struct input_dev *dev, | |
158 | const struct input_device_id *id) | |
159 | { | |
160 | struct input_handle *handle; | |
161 | int error; | |
162 | ||
163 | handle = kzalloc(sizeof(struct input_handle), GFP_KERNEL); | |
164 | if (!handle) | |
165 | return -ENOMEM; | |
166 | ||
167 | handle->dev = dev; | |
168 | handle->handler = handler; | |
169 | handle->name = "rfkill"; | |
170 | ||
171 | error = input_register_handle(handle); | |
172 | if (error) | |
173 | goto err_free_handle; | |
174 | ||
175 | error = input_open_device(handle); | |
176 | if (error) | |
177 | goto err_unregister_handle; | |
178 | ||
179 | return 0; | |
180 | ||
181 | err_unregister_handle: | |
182 | input_unregister_handle(handle); | |
183 | err_free_handle: | |
184 | kfree(handle); | |
185 | return error; | |
186 | } | |
187 | ||
188 | static void rfkill_disconnect(struct input_handle *handle) | |
189 | { | |
190 | input_close_device(handle); | |
191 | input_unregister_handle(handle); | |
192 | kfree(handle); | |
193 | } | |
194 | ||
195 | static const struct input_device_id rfkill_ids[] = { | |
196 | { | |
197 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT, | |
7b19ada2 JS |
198 | .evbit = { BIT_MASK(EV_KEY) }, |
199 | .keybit = { [BIT_WORD(KEY_WLAN)] = BIT_MASK(KEY_WLAN) }, | |
cf4328cd ID |
200 | }, |
201 | { | |
202 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT, | |
7b19ada2 JS |
203 | .evbit = { BIT_MASK(EV_KEY) }, |
204 | .keybit = { [BIT_WORD(KEY_BLUETOOTH)] = BIT_MASK(KEY_BLUETOOTH) }, | |
cf4328cd | 205 | }, |
e0665486 ID |
206 | { |
207 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT, | |
7b19ada2 JS |
208 | .evbit = { BIT_MASK(EV_KEY) }, |
209 | .keybit = { [BIT_WORD(KEY_UWB)] = BIT_MASK(KEY_UWB) }, | |
e0665486 | 210 | }, |
303d9bf6 IPG |
211 | { |
212 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT, | |
213 | .evbit = { BIT_MASK(EV_KEY) }, | |
214 | .keybit = { [BIT_WORD(KEY_WIMAX)] = BIT_MASK(KEY_WIMAX) }, | |
215 | }, | |
28f089c1 HMH |
216 | { |
217 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_SWBIT, | |
218 | .evbit = { BIT(EV_SW) }, | |
219 | .swbit = { [BIT_WORD(SW_RFKILL_ALL)] = BIT_MASK(SW_RFKILL_ALL) }, | |
220 | }, | |
cf4328cd ID |
221 | { } |
222 | }; | |
223 | ||
224 | static struct input_handler rfkill_handler = { | |
225 | .event = rfkill_event, | |
226 | .connect = rfkill_connect, | |
227 | .disconnect = rfkill_disconnect, | |
228 | .name = "rfkill", | |
229 | .id_table = rfkill_ids, | |
230 | }; | |
231 | ||
232 | static int __init rfkill_handler_init(void) | |
233 | { | |
234 | return input_register_handler(&rfkill_handler); | |
235 | } | |
236 | ||
237 | static void __exit rfkill_handler_exit(void) | |
238 | { | |
239 | input_unregister_handler(&rfkill_handler); | |
240 | flush_scheduled_work(); | |
241 | } | |
242 | ||
243 | module_init(rfkill_handler_init); | |
244 | module_exit(rfkill_handler_exit); |