summaryrefslogtreecommitdiffstats
path: root/drivers/media/tuners/e4000.c
blob: 3b5255062a0d721ab0fcd23165d644304a253a16 (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
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
/*
 * Elonics E4000 silicon tuner driver
 *
 * Copyright (C) 2012 Antti Palosaari <crope@iki.fi>
 *
 *    This program is free software; you can redistribute it and/or modify
 *    it under the terms of the GNU General Public License as published by
 *    the Free Software Foundation; either version 2 of the License, or
 *    (at your option) any later version.
 *
 *    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 02110-1301 USA.
 */

#include "e4000_priv.h"
#include <linux/math64.h>

static int e4000_init(struct dvb_frontend *fe)
{
	struct e4000 *s = fe->tuner_priv;
	int ret;

	dev_dbg(&s->client->dev, "%s:\n", __func__);

	/* dummy I2C to ensure I2C wakes up */
	ret = regmap_write(s->regmap, 0x02, 0x40);

	/* reset */
	ret = regmap_write(s->regmap, 0x00, 0x01);
	if (ret)
		goto err;

	/* disable output clock */
	ret = regmap_write(s->regmap, 0x06, 0x00);
	if (ret)
		goto err;

	ret = regmap_write(s->regmap, 0x7a, 0x96);
	if (ret)
		goto err;

	/* configure gains */
	ret = regmap_bulk_write(s->regmap, 0x7e, "\x01\xfe", 2);
	if (ret)
		goto err;

	ret = regmap_write(s->regmap, 0x82, 0x00);
	if (ret)
		goto err;

	ret = regmap_write(s->regmap, 0x24, 0x05);
	if (ret)
		goto err;

	ret = regmap_bulk_write(s->regmap, 0x87, "\x20\x01", 2);
	if (ret)
		goto err;

	ret = regmap_bulk_write(s->regmap, 0x9f, "\x7f\x07", 2);
	if (ret)
		goto err;

	/* DC offset control */
	ret = regmap_write(s->regmap, 0x2d, 0x1f);
	if (ret)
		goto err;

	ret = regmap_bulk_write(s->regmap, 0x70, "\x01\x01", 2);
	if (ret)
		goto err;

	/* gain control */
	ret = regmap_write(s->regmap, 0x1a, 0x17);
	if (ret)
		goto err;

	ret = regmap_write(s->regmap, 0x1f, 0x1a);
	if (ret)
		goto err;

	s->active = true;
err:
	if (ret)
		dev_dbg(&s->client->dev, "%s: failed=%d\n", __func__, ret);

	return ret;
}

static int e4000_sleep(struct dvb_frontend *fe)
{
	struct e4000 *s = fe->tuner_priv;
	int ret;

	dev_dbg(&s->client->dev, "%s:\n", __func__);

	s->active = false;

	ret = regmap_write(s->regmap, 0x00, 0x00);
	if (ret)
		goto err;
err:
	if (ret)
		dev_dbg(&s->client->dev, "%s: failed=%d\n", __func__, ret);

	return ret;
}

static int e4000_set_params(struct dvb_frontend *fe)
{
	struct e4000 *s = fe->tuner_priv;
	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
	int ret, i, sigma_delta;
	u64 f_vco;
	u8 buf[5], i_data[4], q_data[4];

	dev_dbg(&s->client->dev,
			"%s: delivery_system=%d frequency=%u bandwidth_hz=%u\n",
			__func__, c->delivery_system, c->frequency,
			c->bandwidth_hz);

	/* gain control manual */
	ret = regmap_write(s->regmap, 0x1a, 0x00);
	if (ret)
		goto err;

	/* PLL */
	for (i = 0; i < ARRAY_SIZE(e4000_pll_lut); i++) {
		if (c->frequency <= e4000_pll_lut[i].freq)
			break;
	}

	if (i == ARRAY_SIZE(e4000_pll_lut)) {
		ret = -EINVAL;
		goto err;
	}

	f_vco = 1ull * c->frequency * e4000_pll_lut[i].mul;
	sigma_delta = div_u64(0x10000ULL * (f_vco % s->clock), s->clock);
	buf[0] = div_u64(f_vco, s->clock);
	buf[1] = (sigma_delta >> 0) & 0xff;
	buf[2] = (sigma_delta >> 8) & 0xff;
	buf[3] = 0x00;
	buf[4] = e4000_pll_lut[i].div;

	dev_dbg(&s->client->dev,
			"%s: f_vco=%llu pll div=%d sigma_delta=%04x\n",
			__func__, f_vco, buf[0], sigma_delta);

	ret = regmap_bulk_write(s->regmap, 0x09, buf, 5);
	if (ret)
		goto err;

	/* LNA filter (RF filter) */
	for (i = 0; i < ARRAY_SIZE(e400_lna_filter_lut); i++) {
		if (c->frequency <= e400_lna_filter_lut[i].freq)
			break;
	}

	if (i == ARRAY_SIZE(e400_lna_filter_lut)) {
		ret = -EINVAL;
		goto err;
	}

	ret = regmap_write(s->regmap, 0x10, e400_lna_filter_lut[i].val);
	if (ret)
		goto err;

	/* IF filters */
	for (i = 0; i < ARRAY_SIZE(e4000_if_filter_lut); i++) {
		if (c->bandwidth_hz <= e4000_if_filter_lut[i].freq)
			break;
	}

	if (i == ARRAY_SIZE(e4000_if_filter_lut)) {
		ret = -EINVAL;
		goto err;
	}

	buf[0] = e4000_if_filter_lut[i].reg11_val;
	buf[1] = e4000_if_filter_lut[i].reg12_val;

	ret = regmap_bulk_write(s->regmap, 0x11, buf, 2);
	if (ret)
		goto err;

	/* frequency band */
	for (i = 0; i < ARRAY_SIZE(e4000_band_lut); i++) {
		if (c->frequency <= e4000_band_lut[i].freq)
			break;
	}

	if (i == ARRAY_SIZE(e4000_band_lut)) {
		ret = -EINVAL;
		goto err;
	}

	ret = regmap_write(s->regmap, 0x07, e4000_band_lut[i].reg07_val);
	if (ret)
		goto err;

	ret = regmap_write(s->regmap, 0x78, e4000_band_lut[i].reg78_val);
	if (ret)
		goto err;

	/* DC offset */
	for (i = 0; i < 4; i++) {
		if (i == 0)
			ret = regmap_bulk_write(s->regmap, 0x15, "\x00\x7e\x24", 3);
		else if (i == 1)
			ret = regmap_bulk_write(s->regmap, 0x15, "\x00\x7f", 2);
		else if (i == 2)
			ret = regmap_bulk_write(s->regmap, 0x15, "\x01", 1);
		else
			ret = regmap_bulk_write(s->regmap, 0x16, "\x7e", 1);

		if (ret)
			goto err;

		ret = regmap_write(s->regmap, 0x29, 0x01);
		if (ret)
			goto err;

		ret = regmap_bulk_read(s->regmap, 0x2a, buf, 3);
		if (ret)
			goto err;

		i_data[i] = (((buf[2] >> 0) & 0x3) << 6) | (buf[0] & 0x3f);
		q_data[i] = (((buf[2] >> 4) & 0x3) << 6) | (buf[1] & 0x3f);
	}

	swap(q_data[2], q_data[3]);
	swap(i_data[2], i_data[3]);

	ret = regmap_bulk_write(s->regmap, 0x50, q_data, 4);
	if (ret)
		goto err;

	ret = regmap_bulk_write(s->regmap, 0x60, i_data, 4);
	if (ret)
		goto err;

	/* gain control auto */
	ret = regmap_write(s->regmap, 0x1a, 0x17);
	if (ret)
		goto err;
err:
	if (ret)
		dev_dbg(&s->client->dev, "%s: failed=%d\n", __func__, ret);

	return ret;
}

static int e4000_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
{
	struct e4000 *s = fe->tuner_priv;

	dev_dbg(&s->client->dev, "%s:\n", __func__);

	*frequency = 0; /* Zero-IF */

	return 0;
}

static int e4000_set_lna_gain(struct dvb_frontend *fe)
{
	struct e4000 *s = fe->tuner_priv;
	int ret;
	u8 u8tmp;

	dev_dbg(&s->client->dev, "%s: lna auto=%d->%d val=%d->%d\n",
			__func__, s->lna_gain_auto->cur.val,
			s->lna_gain_auto->val, s->lna_gain->cur.val,
			s->lna_gain->val);

	if (s->lna_gain_auto->val && s->if_gain_auto->cur.val)
		u8tmp = 0x17;
	else if (s->lna_gain_auto->val)
		u8tmp = 0x19;
	else if (s->if_gain_auto->cur.val)
		u8tmp = 0x16;
	else
		u8tmp = 0x10;

	ret = regmap_write(s->regmap, 0x1a, u8tmp);
	if (ret)
		goto err;

	if (s->lna_gain_auto->val == false) {
		ret = regmap_write(s->regmap, 0x14, s->lna_gain->val);
		if (ret)
			goto err;
	}
err:
	if (ret)
		dev_dbg(&s->client->dev, "%s: failed=%d\n", __func__, ret);

	return ret;
}

static int e4000_set_mixer_gain(struct dvb_frontend *fe)
{
	struct e4000 *s = fe->tuner_priv;
	int ret;
	u8 u8tmp;

	dev_dbg(&s->client->dev, "%s: mixer auto=%d->%d val=%d->%d\n",
			__func__, s->mixer_gain_auto->cur.val,
			s->mixer_gain_auto->val, s->mixer_gain->cur.val,
			s->mixer_gain->val);

	if (s->mixer_gain_auto->val)
		u8tmp = 0x15;
	else
		u8tmp = 0x14;

	ret = regmap_write(s->regmap, 0x20, u8tmp);
	if (ret)
		goto err;

	if (s->mixer_gain_auto->val == false) {
		ret = regmap_write(s->regmap, 0x15, s->mixer_gain->val);
		if (ret)
			goto err;
	}
err:
	if (ret)
		dev_dbg(&s->client->dev, "%s: failed=%d\n", __func__, ret);

	return ret;
}

static int e4000_set_if_gain(struct dvb_frontend *fe)
{
	struct e4000 *s = fe->tuner_priv;
	int ret;
	u8 buf[2];
	u8 u8tmp;

	dev_dbg(&s->client->dev, "%s: if auto=%d->%d val=%d->%d\n",
			__func__, s->if_gain_auto->cur.val,
			s->if_gain_auto->val, s->if_gain->cur.val,
			s->if_gain->val);

	if (s->if_gain_auto->val && s->lna_gain_auto->cur.val)
		u8tmp = 0x17;
	else if (s->lna_gain_auto->cur.val)
		u8tmp = 0x19;
	else if (s->if_gain_auto->val)
		u8tmp = 0x16;
	else
		u8tmp = 0x10;

	ret = regmap_write(s->regmap, 0x1a, u8tmp);
	if (ret)
		goto err;

	if (s->if_gain_auto->val == false) {
		buf[0] = e4000_if_gain_lut[s->if_gain->val].reg16_val;
		buf[1] = e4000_if_gain_lut[s->if_gain->val].reg17_val;
		ret = regmap_bulk_write(s->regmap, 0x16, buf, 2);
		if (ret)
			goto err;
	}
err:
	if (ret)
		dev_dbg(&s->client->dev, "%s: failed=%d\n", __func__, ret);

	return ret;
}

static int e4000_pll_lock(struct dvb_frontend *fe)
{
	struct e4000 *s = fe->tuner_priv;
	int ret;
	unsigned int utmp;

	ret = regmap_read(s->regmap, 0x07, &utmp);
	if (ret)
		goto err;

	s->pll_lock->val = (utmp & 0x01);
err:
	if (ret)
		dev_dbg(&s->client->dev, "%s: failed=%d\n", __func__, ret);

	return ret;
}

static int e4000_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
{
	struct e4000 *s = container_of(ctrl->handler, struct e4000, hdl);
	int ret;

	if (s->active == false)
		return 0;

	switch (ctrl->id) {
	case  V4L2_CID_RF_TUNER_PLL_LOCK:
		ret = e4000_pll_lock(s->fe);
		break;
	default:
		dev_dbg(&s->client->dev, "%s: unknown ctrl: id=%d name=%s\n",
				__func__, ctrl->id, ctrl->name);
		ret = -EINVAL;
	}

	return ret;
}

static int e4000_s_ctrl(struct v4l2_ctrl *ctrl)
{
	struct e4000 *s = container_of(ctrl->handler, struct e4000, hdl);
	struct dvb_frontend *fe = s->fe;
	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
	int ret;

	if (s->active == false)
		return 0;

	switch (ctrl->id) {
	case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO:
	case V4L2_CID_RF_TUNER_BANDWIDTH:
		c->bandwidth_hz = s->bandwidth->val;
		ret = e4000_set_params(s->fe);
		break;
	case  V4L2_CID_RF_TUNER_LNA_GAIN_AUTO:
	case  V4L2_CID_RF_TUNER_LNA_GAIN:
		ret = e4000_set_lna_gain(s->fe);
		break;
	case  V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO:
	case  V4L2_CID_RF_TUNER_MIXER_GAIN:
		ret = e4000_set_mixer_gain(s->fe);
		break;
	case  V4L2_CID_RF_TUNER_IF_GAIN_AUTO:
	case  V4L2_CID_RF_TUNER_IF_GAIN:
		ret = e4000_set_if_gain(s->fe);
		break;
	default:
		dev_dbg(&s->client->dev, "%s: unknown ctrl: id=%d name=%s\n",
				__func__, ctrl->id, ctrl->name);
		ret = -EINVAL;
	}

	return ret;
}

static const struct v4l2_ctrl_ops e4000_ctrl_ops = {
	.g_volatile_ctrl = e4000_g_volatile_ctrl,
	.s_ctrl = e4000_s_ctrl,
};

static const struct dvb_tuner_ops e4000_tuner_ops = {
	.info = {
		.name           = "Elonics E4000",
		.frequency_min  = 174000000,
		.frequency_max  = 862000000,
	},

	.init = e4000_init,
	.sleep = e4000_sleep,
	.set_params = e4000_set_params,

	.get_if_frequency = e4000_get_if_frequency,
};

/*
 * Use V4L2 subdev to carry V4L2 control handler, even we don't implement
 * subdev itself, just to avoid reinventing the wheel.
 */
static int e4000_probe(struct i2c_client *client,
		const struct i2c_device_id *id)
{
	struct e4000_config *cfg = client->dev.platform_data;
	struct dvb_frontend *fe = cfg->fe;
	struct e4000 *s;
	int ret;
	unsigned int utmp;
	static const struct regmap_config regmap_config = {
		.reg_bits = 8,
		.val_bits = 8,
		.max_register = 0xff,
	};

	s = kzalloc(sizeof(struct e4000), GFP_KERNEL);
	if (!s) {
		ret = -ENOMEM;
		dev_err(&client->dev, "%s: kzalloc() failed\n", KBUILD_MODNAME);
		goto err;
	}

	s->clock = cfg->clock;
	s->client = client;
	s->fe = cfg->fe;
	s->regmap = devm_regmap_init_i2c(client, &regmap_config);
	if (IS_ERR(s->regmap)) {
		ret = PTR_ERR(s->regmap);
		goto err;
	}

	/* check if the tuner is there */
	ret = regmap_read(s->regmap, 0x02, &utmp);
	if (ret)
		goto err;

	dev_dbg(&s->client->dev, "%s: chip id=%02x\n", __func__, utmp);

	if (utmp != 0x40) {
		ret = -ENODEV;
		goto err;
	}

	/* put sleep as chip seems to be in normal mode by default */
	ret = regmap_write(s->regmap, 0x00, 0x00);
	if (ret)
		goto err;

	/* Register controls */
	v4l2_ctrl_handler_init(&s->hdl, 9);
	s->bandwidth_auto = v4l2_ctrl_new_std(&s->hdl, &e4000_ctrl_ops,
			V4L2_CID_RF_TUNER_BANDWIDTH_AUTO, 0, 1, 1, 1);
	s->bandwidth = v4l2_ctrl_new_std(&s->hdl, &e4000_ctrl_ops,
			V4L2_CID_RF_TUNER_BANDWIDTH, 4300000, 11000000, 100000, 4300000);
	v4l2_ctrl_auto_cluster(2, &s->bandwidth_auto, 0, false);
	s->lna_gain_auto = v4l2_ctrl_new_std(&s->hdl, &e4000_ctrl_ops,
			V4L2_CID_RF_TUNER_LNA_GAIN_AUTO, 0, 1, 1, 1);
	s->lna_gain = v4l2_ctrl_new_std(&s->hdl, &e4000_ctrl_ops,
			V4L2_CID_RF_TUNER_LNA_GAIN, 0, 15, 1, 10);
	v4l2_ctrl_auto_cluster(2, &s->lna_gain_auto, 0, false);
	s->mixer_gain_auto = v4l2_ctrl_new_std(&s->hdl, &e4000_ctrl_ops,
			V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO, 0, 1, 1, 1);
	s->mixer_gain = v4l2_ctrl_new_std(&s->hdl, &e4000_ctrl_ops,
			V4L2_CID_RF_TUNER_MIXER_GAIN, 0, 1, 1, 1);
	v4l2_ctrl_auto_cluster(2, &s->mixer_gain_auto, 0, false);
	s->if_gain_auto = v4l2_ctrl_new_std(&s->hdl, &e4000_ctrl_ops,
			V4L2_CID_RF_TUNER_IF_GAIN_AUTO, 0, 1, 1, 1);
	s->if_gain = v4l2_ctrl_new_std(&s->hdl, &e4000_ctrl_ops,
			V4L2_CID_RF_TUNER_IF_GAIN, 0, 54, 1, 0);
	v4l2_ctrl_auto_cluster(2, &s->if_gain_auto, 0, false);
	s->pll_lock = v4l2_ctrl_new_std(&s->hdl, &e4000_ctrl_ops,
			V4L2_CID_RF_TUNER_PLL_LOCK,  0, 1, 1, 0);
	if (s->hdl.error) {
		ret = s->hdl.error;
		dev_err(&s->client->dev, "Could not initialize controls\n");
		v4l2_ctrl_handler_free(&s->hdl);
		goto err;
	}

	s->sd.ctrl_handler = &s->hdl;

	dev_info(&s->client->dev,
			"%s: Elonics E4000 successfully identified\n",
			KBUILD_MODNAME);

	fe->tuner_priv = s;
	memcpy(&fe->ops.tuner_ops, &e4000_tuner_ops,
			sizeof(struct dvb_tuner_ops));

	v4l2_set_subdevdata(&s->sd, client);
	i2c_set_clientdata(client, &s->sd);

	return 0;
err:
	if (ret) {
		dev_dbg(&client->dev, "%s: failed=%d\n", __func__, ret);
		kfree(s);
	}

	return ret;
}

static int e4000_remove(struct i2c_client *client)
{
	struct v4l2_subdev *sd = i2c_get_clientdata(client);
	struct e4000 *s = container_of(sd, struct e4000, sd);
	struct dvb_frontend *fe = s->fe;

	dev_dbg(&client->dev, "%s:\n", __func__);

	v4l2_ctrl_handler_free(&s->hdl);
	memset(&fe->ops.tuner_ops, 0, sizeof(struct dvb_tuner_ops));
	fe->tuner_priv = NULL;
	kfree(s);

	return 0;
}

static const struct i2c_device_id e4000_id[] = {
	{"e4000", 0},
	{}
};
MODULE_DEVICE_TABLE(i2c, e4000_id);

static struct i2c_driver e4000_driver = {
	.driver = {
		.owner	= THIS_MODULE,
		.name	= "e4000",
	},
	.probe		= e4000_probe,
	.remove		= e4000_remove,
	.id_table	= e4000_id,
};

module_i2c_driver(e4000_driver);

MODULE_DESCRIPTION("Elonics E4000 silicon tuner driver");
MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
MODULE_LICENSE("GPL");