aboutsummaryrefslogtreecommitdiff
path: root/drivers/net/wireless/iwlwifi/iwl-led.c
blob: ffb428a7dd6d9a65423da3a8f8bfb5771b3a8a79 (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
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
/******************************************************************************
 *
 * Copyright(c) 2003 - 2008 Intel Corporation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
 *
 * The full GNU General Public License is included in this distribution in the
 * file called LICENSE.
 *
 * Contact Information:
 * James P. Ketrenos <ipw2100-admin@linux.intel.com>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 *****************************************************************************/


#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/dma-mapping.h>
#include <linux/delay.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/wireless.h>
#include <net/mac80211.h>
#include <linux/etherdevice.h>
#include <asm/unaligned.h>

#include "iwl-dev.h"
#include "iwl-core.h"
#include "iwl-io.h"
#include "iwl-helpers.h"

#ifdef CONFIG_IWLWIFI_DEBUG
static const char *led_type_str[] = {
	__stringify(IWL_LED_TRG_TX),
	__stringify(IWL_LED_TRG_RX),
	__stringify(IWL_LED_TRG_ASSOC),
	__stringify(IWL_LED_TRG_RADIO),
	NULL
};
#endif /* CONFIG_IWLWIFI_DEBUG */


static const struct {
	u16 tpt;
	u8 on_time;
	u8 off_time;
} blink_tbl[] =
{
	{300, 25, 25},
	{200, 40, 40},
	{100, 55, 55},
	{70, 65, 65},
	{50, 75, 75},
	{20, 85, 85},
	{15, 95, 95 },
	{10, 110, 110},
	{5, 130, 130},
	{0, 167, 167},
/* SOLID_ON */
	{-1, IWL_LED_SOLID, 0}
};

#define IWL_1MB_RATE (128 * 1024)
#define IWL_LED_THRESHOLD (16)
#define IWL_MAX_BLINK_TBL (ARRAY_SIZE(blink_tbl) - 1) /* exclude SOLID_ON */
#define IWL_SOLID_BLINK_IDX (ARRAY_SIZE(blink_tbl) - 1)

/*  [0-256] -> [0..8] FIXME: we need [0..10] */
static inline int iwl_brightness_to_idx(enum led_brightness brightness)
{
	return fls(0x000000FF & (u32)brightness);
}

/* Send led command */
static int iwl_send_led_cmd(struct iwl_priv *priv, struct iwl_led_cmd *led_cmd)
{
	struct iwl_host_cmd cmd = {
		.id = REPLY_LEDS_CMD,
		.len = sizeof(struct iwl_led_cmd),
		.data = led_cmd,
		.meta.flags = CMD_ASYNC,
		.meta.u.callback = NULL,
	};
	u32 reg;

	reg = iwl_read32(priv, CSR_LED_REG);
	if (reg != (reg & CSR_LED_BSM_CTRL_MSK))
		iwl_write32(priv, CSR_LED_REG, reg & CSR_LED_BSM_CTRL_MSK);

	return iwl_send_cmd(priv, &cmd);
}

/* Set led pattern command */
static int iwl4965_led_pattern(struct iwl_priv *priv, int led_id,
			       unsigned int idx)
{
	struct iwl_led_cmd led_cmd = {
		.id = led_id,
		.interval = IWL_DEF_LED_INTRVL
	};

	BUG_ON(idx > IWL_MAX_BLINK_TBL);

	led_cmd.on = blink_tbl[idx].on_time;
	led_cmd.off = blink_tbl[idx].off_time;

	return iwl_send_led_cmd(priv, &led_cmd);
}

/* Set led register off */
static int iwl4965_led_on_reg(struct iwl_priv *priv, int led_id)
{
	IWL_DEBUG_LED("led on %d\n", led_id);
	iwl_write32(priv, CSR_LED_REG, CSR_LED_REG_TRUN_ON);
	return 0;
}

#if 0
/* Set led on command */
static int iwl4965_led_on(struct iwl_priv *priv, int led_id)
{
	struct iwl_led_cmd led_cmd = {
		.id = led_id,
		.on = IWL_LED_SOLID,
		.off = 0,
		.interval = IWL_DEF_LED_INTRVL
	};
	return iwl_send_led_cmd(priv, &led_cmd);
}

/* Set led off command */
int iwl4965_led_off(struct iwl_priv *priv, int led_id)
{
	struct iwl_led_cmd led_cmd = {
		.id = led_id,
		.on = 0,
		.off = 0,
		.interval = IWL_DEF_LED_INTRVL
	};
	IWL_DEBUG_LED("led off %d\n", led_id);
	return iwl_send_led_cmd(priv, &led_cmd);
}
#endif


/* Set led register off */
static int iwl4965_led_off_reg(struct iwl_priv *priv, int led_id)
{
	IWL_DEBUG_LED("LED Reg off\n");
	iwl_write32(priv, CSR_LED_REG, CSR_LED_REG_TRUN_OFF);
	return 0;
}

/*
 * Set led register in case of disassociation according to rfkill state
 */
static int iwl_led_associate(struct iwl_priv *priv, int led_id)
{
	IWL_DEBUG_LED("Associated\n");
	priv->allow_blinking = 1;
	return iwl4965_led_on_reg(priv, led_id);
}
static int iwl_led_disassociate(struct iwl_priv *priv, int led_id)
{
	priv->allow_blinking = 0;
	if (iwl_is_rfkill(priv))
		iwl4965_led_off_reg(priv, led_id);
	else
		iwl4965_led_on_reg(priv, led_id);

	return 0;
}

/*
 * brightness call back function for Tx/Rx LED
 */
static int iwl_led_associated(struct iwl_priv *priv, int led_id)
{
	if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
	    !test_bit(STATUS_READY, &priv->status))
		return 0;


	/* start counting Tx/Rx bytes */
	if (!priv->last_blink_time && priv->allow_blinking)
		priv->last_blink_time = jiffies;
	return 0;
}

/*
 * brightness call back for association and radio
 */
static void iwl_led_brightness_set(struct led_classdev *led_cdev,
				       enum led_brightness brightness)
{
	struct iwl_led *led = container_of(led_cdev, struct iwl_led, led_dev);
	struct iwl_priv *priv = led->priv;

	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
		return;


	IWL_DEBUG_LED("Led type = %s brightness = %d\n",
			led_type_str[led->type], brightness);
	switch (brightness) {
	case LED_FULL:
		if (led->led_on)
			led->led_on(priv, IWL_LED_LINK);
		break;
	case LED_OFF:
		if (led->led_off)
			led->led_off(priv, IWL_LED_LINK);
		break;
	default:
		if (led->led_pattern) {
			int idx = iwl_brightness_to_idx(brightness);
			led->led_pattern(priv, IWL_LED_LINK, idx);
		}
		break;
	}
}



/*
 * Register led class with the system
 */
static int iwl_leds_register_led(struct iwl_priv *priv, struct iwl_led *led,
				   enum led_type type, u8 set_led,
				   char *trigger)
{
	struct device *device = wiphy_dev(priv->hw->wiphy);
	int ret;

	led->led_dev.name = led->name;
	led->led_dev.brightness_set = iwl_led_brightness_set;
	led->led_dev.default_trigger = trigger;

	led->priv = priv;
	led->type = type;

	ret = led_classdev_register(device, &led->led_dev);
	if (ret) {
		IWL_ERROR("Error: failed to register led handler.\n");
		return ret;
	}

	led->registered = 1;

	if (set_led && led->led_on)
		led->led_on(priv, IWL_LED_LINK);

	return 0;
}


/*
 * calculate blink rate according to last 2 sec Tx/Rx activities
 */
static int iwl_get_blink_rate(struct iwl_priv *priv)
{
	int i;
	u64 current_tpt = priv->tx_stats[2].bytes;
	/* FIXME: + priv->rx_stats[2].bytes; */
	s64 tpt = current_tpt - priv->led_tpt;

	if (tpt < 0) /* wraparound */
		tpt = -tpt;

	IWL_DEBUG_LED("tpt %lld current_tpt %llu\n",
		(long long)tpt,
		(unsigned long long)current_tpt);
	priv->led_tpt = current_tpt;

	if (!priv->allow_blinking)
		i = IWL_MAX_BLINK_TBL;
	else
		for (i = 0; i < IWL_MAX_BLINK_TBL; i++)
			if (tpt  > (blink_tbl[i].tpt * IWL_1MB_RATE))
				break;

	IWL_DEBUG_LED("LED BLINK IDX=%d", i);
	return i;
}

/*
 * this function called from handler. Since setting Led command can
 * happen very frequent we postpone led command to be called from
 * REPLY handler so we know ucode is up
 */
void iwl_leds_background(struct iwl_priv *priv)
{
	u8 blink_idx;

	if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
		priv->last_blink_time = 0;
		return;
	}
	if (iwl_is_rfkill(priv)) {
		priv->last_blink_time = 0;
		return;
	}

	if (!priv->allow_blinking) {
		priv->last_blink_time = 0;
		if (priv->last_blink_rate != IWL_SOLID_BLINK_IDX) {
			priv->last_blink_rate = IWL_SOLID_BLINK_IDX;
			iwl4965_led_pattern(priv, IWL_LED_LINK,
					    IWL_SOLID_BLINK_IDX);
		}
		return;
	}
	if (!priv->last_blink_time ||
	    !time_after(jiffies, priv->last_blink_time +
			msecs_to_jiffies(1000)))
		return;

	blink_idx = iwl_get_blink_rate(priv);

	/* call only if blink rate change */
	if (blink_idx != priv->last_blink_rate)
		iwl4965_led_pattern(priv, IWL_LED_LINK, blink_idx);

	priv->last_blink_time = jiffies;
	priv->last_blink_rate = blink_idx;
}
EXPORT_SYMBOL(iwl_leds_background);

/* Register all led handler */
int iwl_leds_register(struct iwl_priv *priv)
{
	char *trigger;
	int ret;

	priv->last_blink_rate = 0;
	priv->led_tpt = 0;
	priv->last_blink_time = 0;
	priv->allow_blinking = 0;

	trigger = ieee80211_get_radio_led_name(priv->hw);
	snprintf(priv->led[IWL_LED_TRG_RADIO].name,
		 sizeof(priv->led[IWL_LED_TRG_RADIO].name), "iwl-%s:radio",
		 wiphy_name(priv->hw->wiphy));

	priv->led[IWL_LED_TRG_RADIO].led_on = iwl4965_led_on_reg;
	priv->led[IWL_LED_TRG_RADIO].led_off = iwl4965_led_off_reg;
	priv->led[IWL_LED_TRG_RADIO].led_pattern = NULL;

	ret = iwl_leds_register_led(priv, &priv->led[IWL_LED_TRG_RADIO],
				   IWL_LED_TRG_RADIO, 1, trigger);
	if (ret)
		goto exit_fail;

	trigger = ieee80211_get_assoc_led_name(priv->hw);
	snprintf(priv->led[IWL_LED_TRG_ASSOC].name,
		 sizeof(priv->led[IWL_LED_TRG_ASSOC].name), "iwl-%s:assoc",
		 wiphy_name(priv->hw->wiphy));

	ret = iwl_leds_register_led(priv, &priv->led[IWL_LED_TRG_ASSOC],
				   IWL_LED_TRG_ASSOC, 0, trigger);

	/* for assoc always turn led on */
	priv->led[IWL_LED_TRG_ASSOC].led_on = iwl_led_associate;
	priv->led[IWL_LED_TRG_ASSOC].led_off = iwl_led_disassociate;
	priv->led[IWL_LED_TRG_ASSOC].led_pattern = NULL;

	if (ret)
		goto exit_fail;

	trigger = ieee80211_get_rx_led_name(priv->hw);
	snprintf(priv->led[IWL_LED_TRG_RX].name,
		 sizeof(priv->led[IWL_LED_TRG_RX].name), "iwl-%s:RX",
		 wiphy_name(priv->hw->wiphy));

	ret = iwl_leds_register_led(priv, &priv->led[IWL_LED_TRG_RX],
				   IWL_LED_TRG_RX, 0, trigger);

	priv->led[IWL_LED_TRG_RX].led_on = iwl_led_associated;
	priv->led[IWL_LED_TRG_RX].led_off = iwl_led_associated;
	priv->led[IWL_LED_TRG_RX].led_pattern = iwl4965_led_pattern;

	if (ret)
		goto exit_fail;

	trigger = ieee80211_get_tx_led_name(priv->hw);
	snprintf(priv->led[IWL_LED_TRG_TX].name,
		 sizeof(priv->led[IWL_LED_TRG_TX].name), "iwl-%s:TX",
		 wiphy_name(priv->hw->wiphy));

	ret = iwl_leds_register_led(priv, &priv->led[IWL_LED_TRG_TX],
				   IWL_LED_TRG_TX, 0, trigger);

	priv->led[IWL_LED_TRG_TX].led_on = iwl_led_associated;
	priv->led[IWL_LED_TRG_TX].led_off = iwl_led_associated;
	priv->led[IWL_LED_TRG_TX].led_pattern = iwl4965_led_pattern;

	if (ret)
		goto exit_fail;

	return 0;

exit_fail:
	iwl_leds_unregister(priv);
	return ret;
}
EXPORT_SYMBOL(iwl_leds_register);

/* unregister led class */
static void iwl_leds_unregister_led(struct iwl_led *led, u8 set_led)
{
	if (!led->registered)
		return;

	led_classdev_unregister(&led->led_dev);

	if (set_led)
		led->led_dev.brightness_set(&led->led_dev, LED_OFF);
	led->registered = 0;
}

/* Unregister all led handlers */
void iwl_leds_unregister(struct iwl_priv *priv)
{
	iwl_leds_unregister_led(&priv->led[IWL_LED_TRG_ASSOC], 0);
	iwl_leds_unregister_led(&priv->led[IWL_LED_TRG_RX], 0);
	iwl_leds_unregister_led(&priv->led[IWL_LED_TRG_TX], 0);
	iwl_leds_unregister_led(&priv->led[IWL_LED_TRG_RADIO], 1);
}
EXPORT_SYMBOL(iwl_leds_unregister);