2 * Input layer to RF Kill interface connector
4 * Copyright (c) 2007 Dmitry Torokhov
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.
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>
20 #include "rfkill-input.h"
22 MODULE_AUTHOR("Dmitry Torokhov <dtor@mail.ru>");
23 MODULE_DESCRIPTION("Input layer to RF switch connector");
24 MODULE_LICENSE("GPL");
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 */
35 static void rfkill_task_handler(struct work_struct *work)
37 struct rfkill_task *task = container_of(work, struct rfkill_task, work);
39 mutex_lock(&task->mutex);
41 rfkill_switch_all(task->type, task->desired_state);
43 mutex_unlock(&task->mutex);
46 static void rfkill_task_epo_handler(struct work_struct *work)
51 static DECLARE_WORK(epo_work, rfkill_task_epo_handler);
53 static void rfkill_schedule_epo(void)
55 schedule_work(&epo_work);
58 static void rfkill_schedule_set(struct rfkill_task *task,
59 enum rfkill_state desired_state)
63 if (unlikely(work_pending(&epo_work)))
66 spin_lock_irqsave(&task->lock, flags);
68 if (time_after(jiffies, task->last + msecs_to_jiffies(200))) {
69 task->desired_state = desired_state;
71 schedule_work(&task->work);
74 spin_unlock_irqrestore(&task->lock, flags);
77 static void rfkill_schedule_toggle(struct rfkill_task *task)
81 if (unlikely(work_pending(&epo_work)))
84 spin_lock_irqsave(&task->lock, flags);
86 if (time_after(jiffies, task->last + msecs_to_jiffies(200))) {
87 task->desired_state = !task->desired_state;
89 schedule_work(&task->work);
92 spin_unlock_irqrestore(&task->lock, flags);
95 #define DEFINE_RFKILL_TASK(n, t) \
96 struct rfkill_task n = { \
97 .work = __WORK_INITIALIZER(n.work, \
98 rfkill_task_handler), \
100 .mutex = __MUTEX_INITIALIZER(n.mutex), \
101 .lock = __SPIN_LOCK_UNLOCKED(n.lock), \
102 .desired_state = RFKILL_STATE_ON, \
105 static DEFINE_RFKILL_TASK(rfkill_wlan, RFKILL_TYPE_WLAN);
106 static DEFINE_RFKILL_TASK(rfkill_bt, RFKILL_TYPE_BLUETOOTH);
107 static DEFINE_RFKILL_TASK(rfkill_uwb, RFKILL_TYPE_UWB);
108 static DEFINE_RFKILL_TASK(rfkill_wimax, RFKILL_TYPE_WIMAX);
109 static DEFINE_RFKILL_TASK(rfkill_wwan, RFKILL_TYPE_WWAN);
111 static void rfkill_event(struct input_handle *handle, unsigned int type,
112 unsigned int code, int data)
114 if (type == EV_KEY && data == 1) {
117 rfkill_schedule_toggle(&rfkill_wlan);
120 rfkill_schedule_toggle(&rfkill_bt);
123 rfkill_schedule_toggle(&rfkill_uwb);
126 rfkill_schedule_toggle(&rfkill_wimax);
131 } else if (type == EV_SW) {
134 /* EVERY radio type. data != 0 means radios ON */
135 /* handle EPO (emergency power off) through shortcut */
137 rfkill_schedule_set(&rfkill_wwan,
139 rfkill_schedule_set(&rfkill_wimax,
141 rfkill_schedule_set(&rfkill_uwb,
143 rfkill_schedule_set(&rfkill_bt,
145 rfkill_schedule_set(&rfkill_wlan,
148 rfkill_schedule_epo();
156 static int rfkill_connect(struct input_handler *handler, struct input_dev *dev,
157 const struct input_device_id *id)
159 struct input_handle *handle;
162 handle = kzalloc(sizeof(struct input_handle), GFP_KERNEL);
167 handle->handler = handler;
168 handle->name = "rfkill";
170 error = input_register_handle(handle);
172 goto err_free_handle;
174 error = input_open_device(handle);
176 goto err_unregister_handle;
180 err_unregister_handle:
181 input_unregister_handle(handle);
187 static void rfkill_disconnect(struct input_handle *handle)
189 input_close_device(handle);
190 input_unregister_handle(handle);
194 static const struct input_device_id rfkill_ids[] = {
196 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT,
197 .evbit = { BIT_MASK(EV_KEY) },
198 .keybit = { [BIT_WORD(KEY_WLAN)] = BIT_MASK(KEY_WLAN) },
201 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT,
202 .evbit = { BIT_MASK(EV_KEY) },
203 .keybit = { [BIT_WORD(KEY_BLUETOOTH)] = BIT_MASK(KEY_BLUETOOTH) },
206 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT,
207 .evbit = { BIT_MASK(EV_KEY) },
208 .keybit = { [BIT_WORD(KEY_UWB)] = BIT_MASK(KEY_UWB) },
211 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT,
212 .evbit = { BIT_MASK(EV_KEY) },
213 .keybit = { [BIT_WORD(KEY_WIMAX)] = BIT_MASK(KEY_WIMAX) },
216 .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_SWBIT,
217 .evbit = { BIT(EV_SW) },
218 .swbit = { [BIT_WORD(SW_RFKILL_ALL)] = BIT_MASK(SW_RFKILL_ALL) },
223 static struct input_handler rfkill_handler = {
224 .event = rfkill_event,
225 .connect = rfkill_connect,
226 .disconnect = rfkill_disconnect,
228 .id_table = rfkill_ids,
231 static int __init rfkill_handler_init(void)
233 return input_register_handler(&rfkill_handler);
236 static void __exit rfkill_handler_exit(void)
238 input_unregister_handler(&rfkill_handler);
239 flush_scheduled_work();
242 module_init(rfkill_handler_init);
243 module_exit(rfkill_handler_exit);