aboutsummaryrefslogtreecommitdiff
path: root/net/mac80211/led.c
blob: 0505845b7ab836c15888a06b3b7d76995d46e685 (plain)
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
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
/*
 * Copyright 2006, Johannes Berg <johannes@sipsolutions.net>
 *
 * 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.
 */

/* just for IFNAMSIZ */
#include <linux/if.h>
#include <linux/slab.h>
#include <linux/export.h>
#include "led.h"

void ieee80211_led_assoc(struct ieee80211_local *local, bool associated)
{
	if (!atomic_read(&local->assoc_led_active))
		return;
	if (associated)
		led_trigger_event(&local->assoc_led, LED_FULL);
	else
		led_trigger_event(&local->assoc_led, LED_OFF);
}

void ieee80211_led_radio(struct ieee80211_local *local, bool enabled)
{
	if (!atomic_read(&local->radio_led_active))
		return;
	if (enabled)
		led_trigger_event(&local->radio_led, LED_FULL);
	else
		led_trigger_event(&local->radio_led, LED_OFF);
}

void ieee80211_alloc_led_names(struct ieee80211_local *local)
{
	local->rx_led.name = kasprintf(GFP_KERNEL, "%srx",
				       wiphy_name(local->hw.wiphy));
	local->tx_led.name = kasprintf(GFP_KERNEL, "%stx",
				       wiphy_name(local->hw.wiphy));
	local->assoc_led.name = kasprintf(GFP_KERNEL, "%sassoc",
					  wiphy_name(local->hw.wiphy));
	local->radio_led.name = kasprintf(GFP_KERNEL, "%sradio",
					  wiphy_name(local->hw.wiphy));
}

void ieee80211_free_led_names(struct ieee80211_local *local)
{
	kfree(local->rx_led.name);
	kfree(local->tx_led.name);
	kfree(local->assoc_led.name);
	kfree(local->radio_led.name);
}

static void ieee80211_tx_led_activate(struct led_classdev *led_cdev)
{
	struct ieee80211_local *local = container_of(led_cdev->trigger,
						     struct ieee80211_local,
						     tx_led);

	atomic_inc(&local->tx_led_active);
}

static void ieee80211_tx_led_deactivate(struct led_classdev *led_cdev)
{
	struct ieee80211_local *local = container_of(led_cdev->trigger,
						     struct ieee80211_local,
						     tx_led);

	atomic_dec(&local->tx_led_active);
}

static void ieee80211_rx_led_activate(struct led_classdev *led_cdev)
{
	struct ieee80211_local *local = container_of(led_cdev->trigger,
						     struct ieee80211_local,
						     rx_led);

	atomic_inc(&local->rx_led_active);
}

static void ieee80211_rx_led_deactivate(struct led_classdev *led_cdev)
{
	struct ieee80211_local *local = container_of(led_cdev->trigger,
						     struct ieee80211_local,
						     rx_led);

	atomic_dec(&local->rx_led_active);
}

static void ieee80211_assoc_led_activate(struct led_classdev *led_cdev)
{
	struct ieee80211_local *local = container_of(led_cdev->trigger,
						     struct ieee80211_local,
						     assoc_led);

	atomic_inc(&local->assoc_led_active);
}

static void ieee80211_assoc_led_deactivate(struct led_classdev *led_cdev)
{
	struct ieee80211_local *local = container_of(led_cdev->trigger,
						     struct ieee80211_local,
						     assoc_led);

	atomic_dec(&local->assoc_led_active);
}

static void ieee80211_radio_led_activate(struct led_classdev *led_cdev)
{
	struct ieee80211_local *local = container_of(led_cdev->trigger,
						     struct ieee80211_local,
						     radio_led);

	atomic_inc(&local->radio_led_active);
}

static void ieee80211_radio_led_deactivate(struct led_classdev *led_cdev)
{
	struct ieee80211_local *local = container_of(led_cdev->trigger,
						     struct ieee80211_local,
						     radio_led);

	atomic_dec(&local->radio_led_active);
}

static void ieee80211_tpt_led_activate(struct led_classdev *led_cdev)
{
	struct ieee80211_local *local = container_of(led_cdev->trigger,
						     struct ieee80211_local,
						     tpt_led);

	atomic_inc(&local->tpt_led_active);
}

static void ieee80211_tpt_led_deactivate(struct led_classdev *led_cdev)
{
	struct ieee80211_local *local = container_of(led_cdev->trigger,
						     struct ieee80211_local,
						     tpt_led);

	atomic_dec(&local->tpt_led_active);
}

void ieee80211_led_init(struct ieee80211_local *local)
{
	atomic_set(&local->rx_led_active, 0);
	local->rx_led.activate = ieee80211_rx_led_activate;
	local->rx_led.deactivate = ieee80211_rx_led_deactivate;
	if (local->rx_led.name && led_trigger_register(&local->rx_led)) {
		kfree(local->rx_led.name);
		local->rx_led.name = NULL;
	}

	atomic_set(&local->tx_led_active, 0);
	local->tx_led.activate = ieee80211_tx_led_activate;
	local->tx_led.deactivate = ieee80211_tx_led_deactivate;
	if (local->tx_led.name && led_trigger_register(&local->tx_led)) {
		kfree(local->tx_led.name);
		local->tx_led.name = NULL;
	}

	atomic_set(&local->assoc_led_active, 0);
	local->assoc_led.activate = ieee80211_assoc_led_activate;
	local->assoc_led.deactivate = ieee80211_assoc_led_deactivate;
	if (local->assoc_led.name && led_trigger_register(&local->assoc_led)) {
		kfree(local->assoc_led.name);
		local->assoc_led.name = NULL;
	}

	atomic_set(&local->radio_led_active, 0);
	local->radio_led.activate = ieee80211_radio_led_activate;
	local->radio_led.deactivate = ieee80211_radio_led_deactivate;
	if (local->radio_led.name && led_trigger_register(&local->radio_led)) {
		kfree(local->radio_led.name);
		local->radio_led.name = NULL;
	}

	atomic_set(&local->tpt_led_active, 0);
	if (local->tpt_led_trigger) {
		local->tpt_led.activate = ieee80211_tpt_led_activate;
		local->tpt_led.deactivate = ieee80211_tpt_led_deactivate;
		if (led_trigger_register(&local->tpt_led)) {
			kfree(local->tpt_led_trigger);
			local->tpt_led_trigger = NULL;
		}
	}
}

void ieee80211_led_exit(struct ieee80211_local *local)
{
	if (local->radio_led.name)
		led_trigger_unregister(&local->radio_led);
	if (local->assoc_led.name)
		led_trigger_unregister(&local->assoc_led);
	if (local->tx_led.name)
		led_trigger_unregister(&local->tx_led);
	if (local->rx_led.name)
		led_trigger_unregister(&local->rx_led);

	if (local->tpt_led_trigger) {
		led_trigger_unregister(&local->tpt_led);
		kfree(local->tpt_led_trigger);
	}
}

const char *__ieee80211_get_radio_led_name(struct ieee80211_hw *hw)
{
	struct ieee80211_local *local = hw_to_local(hw);

	return local->radio_led.name;
}
EXPORT_SYMBOL(__ieee80211_get_radio_led_name);

const char *__ieee80211_get_assoc_led_name(struct ieee80211_hw *hw)
{
	struct ieee80211_local *local = hw_to_local(hw);

	return local->assoc_led.name;
}
EXPORT_SYMBOL(__ieee80211_get_assoc_led_name);

const char *__ieee80211_get_tx_led_name(struct ieee80211_hw *hw)
{
	struct ieee80211_local *local = hw_to_local(hw);

	return local->tx_led.name;
}
EXPORT_SYMBOL(__ieee80211_get_tx_led_name);

const char *__ieee80211_get_rx_led_name(struct ieee80211_hw *hw)
{
	struct ieee80211_local *local = hw_to_local(hw);

	return local->rx_led.name;
}
EXPORT_SYMBOL(__ieee80211_get_rx_led_name);

static unsigned long tpt_trig_traffic(struct ieee80211_local *local,
				      struct tpt_led_trigger *tpt_trig)
{
	unsigned long traffic, delta;

	traffic = tpt_trig->tx_bytes + tpt_trig->rx_bytes;

	delta = traffic - tpt_trig->prev_traffic;
	tpt_trig->prev_traffic = traffic;
	return DIV_ROUND_UP(delta, 1024 / 8);
}

static void tpt_trig_timer(unsigned long data)
{
	struct ieee80211_local *local = (void *)data;
	struct tpt_led_trigger *tpt_trig = local->tpt_led_trigger;
	struct led_classdev *led_cdev;
	unsigned long on, off, tpt;
	int i;

	if (!tpt_trig->running)
		return;

	mod_timer(&tpt_trig->timer, round_jiffies(jiffies + HZ));

	tpt = tpt_trig_traffic(local, tpt_trig);

	/* default to just solid on */
	on = 1;
	off = 0;

	for (i = tpt_trig->blink_table_len - 1; i >= 0; i--) {
		if (tpt_trig->blink_table[i].throughput < 0 ||
		    tpt > tpt_trig->blink_table[i].throughput) {
			off = tpt_trig->blink_table[i].blink_time / 2;
			on = tpt_trig->blink_table[i].blink_time - off;
			break;
		}
	}

	read_lock(&local->tpt_led.leddev_list_lock);
	list_for_each_entry(led_cdev, &local->tpt_led.led_cdevs, trig_list)
		led_blink_set(led_cdev, &on, &off);
	read_unlock(&local->tpt_led.leddev_list_lock);
}

const char *
__ieee80211_create_tpt_led_trigger(struct ieee80211_hw *hw,
				   unsigned int flags,
				   const struct ieee80211_tpt_blink *blink_table,
				   unsigned int blink_table_len)
{
	struct ieee80211_local *local = hw_to_local(hw);
	struct tpt_led_trigger *tpt_trig;

	if (WARN_ON(local->tpt_led_trigger))
		return NULL;

	tpt_trig = kzalloc(sizeof(struct tpt_led_trigger), GFP_KERNEL);
	if (!tpt_trig)
		return NULL;

	snprintf(tpt_trig->name, sizeof(tpt_trig->name),
		 "%stpt", wiphy_name(local->hw.wiphy));

	local->tpt_led.name = tpt_trig->name;

	tpt_trig->blink_table = blink_table;
	tpt_trig->blink_table_len = blink_table_len;
	tpt_trig->want = flags;

	setup_timer(&tpt_trig->timer, tpt_trig_timer, (unsigned long)local);

	local->tpt_led_trigger = tpt_trig;

	return tpt_trig->name;
}
EXPORT_SYMBOL(__ieee80211_create_tpt_led_trigger);

static void ieee80211_start_tpt_led_trig(struct ieee80211_local *local)
{
	struct tpt_led_trigger *tpt_trig = local->tpt_led_trigger;

	if (tpt_trig->running)
		return;

	/* reset traffic */
	tpt_trig_traffic(local, tpt_trig);
	tpt_trig->running = true;

	tpt_trig_timer((unsigned long)local);
	mod_timer(&tpt_trig->timer, round_jiffies(jiffies + HZ));
}

static void ieee80211_stop_tpt_led_trig(struct ieee80211_local *local)
{
	struct tpt_led_trigger *tpt_trig = local->tpt_led_trigger;
	struct led_classdev *led_cdev;

	if (!tpt_trig->running)
		return;

	tpt_trig->running = false;
	del_timer_sync(&tpt_trig->timer);

	read_lock(&local->tpt_led.leddev_list_lock);
	list_for_each_entry(led_cdev, &local->tpt_led.led_cdevs, trig_list)
		led_set_brightness(led_cdev, LED_OFF);
	read_unlock(&local->tpt_led.leddev_list_lock);
}

void ieee80211_mod_tpt_led_trig(struct ieee80211_local *local,
				unsigned int types_on, unsigned int types_off)
{
	struct tpt_led_trigger *tpt_trig = local->tpt_led_trigger;
	bool allowed;

	WARN_ON(types_on & types_off);

	if (!tpt_trig)
		return;

	tpt_trig->active &= ~types_off;
	tpt_trig->active |= types_on;

	/*
	 * Regardless of wanted state, we shouldn't blink when
	 * the radio is disabled -- this can happen due to some
	 * code ordering issues with __ieee80211_recalc_idle()
	 * being called before the radio is started.
	 */
	allowed = tpt_trig->active & IEEE80211_TPT_LEDTRIG_FL_RADIO;

	if (!allowed || !(tpt_trig->active & tpt_trig->want))
		ieee80211_stop_tpt_led_trig(local);
	else
		ieee80211_start_tpt_led_trig(local);
}