1 /*
2  * Afatech AF9033 demodulator driver
3  *
4  * Copyright (C) 2009 Antti Palosaari <crope@iki.fi>
5  * Copyright (C) 2012 Antti Palosaari <crope@iki.fi>
6  *
7  *    This program is free software; you can redistribute it and/or modify
8  *    it under the terms of the GNU General Public License as published by
9  *    the Free Software Foundation; either version 2 of the License, or
10  *    (at your option) any later version.
11  *
12  *    This program is distributed in the hope that it will be useful,
13  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
14  *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15  *    GNU General Public License for more details.
16  */
17 
18 #include "af9033_priv.h"
19 
20 struct af9033_dev {
21 	struct i2c_client *client;
22 	struct regmap *regmap;
23 	struct dvb_frontend fe;
24 	struct af9033_config cfg;
25 	bool is_af9035;
26 	bool is_it9135;
27 
28 	u32 bandwidth_hz;
29 	bool ts_mode_parallel;
30 	bool ts_mode_serial;
31 
32 	enum fe_status fe_status;
33 	u64 post_bit_error_prev; /* for old read_ber we return (curr - prev) */
34 	u64 post_bit_error;
35 	u64 post_bit_count;
36 	u64 error_block_count;
37 	u64 total_block_count;
38 };
39 
40 /* Write reg val table using reg addr auto increment */
41 static int af9033_wr_reg_val_tab(struct af9033_dev *dev,
42 				 const struct reg_val *tab, int tab_len)
43 {
44 	struct i2c_client *client = dev->client;
45 #define MAX_TAB_LEN 212
46 	int ret, i, j;
47 	u8 buf[1 + MAX_TAB_LEN];
48 
49 	dev_dbg(&client->dev, "tab_len=%d\n", tab_len);
50 
51 	if (tab_len > sizeof(buf)) {
52 		dev_warn(&client->dev, "tab len %d is too big\n", tab_len);
53 		return -EINVAL;
54 	}
55 
56 	for (i = 0, j = 0; i < tab_len; i++) {
57 		buf[j] = tab[i].val;
58 
59 		if (i == tab_len - 1 || tab[i].reg != tab[i + 1].reg - 1) {
60 			ret = regmap_bulk_write(dev->regmap, tab[i].reg - j,
61 						buf, j + 1);
62 			if (ret)
63 				goto err;
64 
65 			j = 0;
66 		} else {
67 			j++;
68 		}
69 	}
70 
71 	return 0;
72 err:
73 	dev_dbg(&client->dev, "failed=%d\n", ret);
74 	return ret;
75 }
76 
77 static int af9033_init(struct dvb_frontend *fe)
78 {
79 	struct af9033_dev *dev = fe->demodulator_priv;
80 	struct i2c_client *client = dev->client;
81 	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
82 	int ret, i, len;
83 	unsigned int utmp;
84 	const struct reg_val *init;
85 	u8 buf[4];
86 	struct reg_val_mask tab[] = {
87 		{ 0x80fb24, 0x00, 0x08 },
88 		{ 0x80004c, 0x00, 0xff },
89 		{ 0x00f641, dev->cfg.tuner, 0xff },
90 		{ 0x80f5ca, 0x01, 0x01 },
91 		{ 0x80f715, 0x01, 0x01 },
92 		{ 0x00f41f, 0x04, 0x04 },
93 		{ 0x00f41a, 0x01, 0x01 },
94 		{ 0x80f731, 0x00, 0x01 },
95 		{ 0x00d91e, 0x00, 0x01 },
96 		{ 0x00d919, 0x00, 0x01 },
97 		{ 0x80f732, 0x00, 0x01 },
98 		{ 0x00d91f, 0x00, 0x01 },
99 		{ 0x00d91a, 0x00, 0x01 },
100 		{ 0x80f730, 0x00, 0x01 },
101 		{ 0x80f778, 0x00, 0xff },
102 		{ 0x80f73c, 0x01, 0x01 },
103 		{ 0x80f776, 0x00, 0x01 },
104 		{ 0x00d8fd, 0x01, 0xff },
105 		{ 0x00d830, 0x01, 0xff },
106 		{ 0x00d831, 0x00, 0xff },
107 		{ 0x00d832, 0x00, 0xff },
108 		{ 0x80f985, dev->ts_mode_serial, 0x01 },
109 		{ 0x80f986, dev->ts_mode_parallel, 0x01 },
110 		{ 0x00d827, 0x00, 0xff },
111 		{ 0x00d829, 0x00, 0xff },
112 		{ 0x800045, dev->cfg.adc_multiplier, 0xff },
113 	};
114 
115 	dev_dbg(&client->dev, "\n");
116 
117 	/* Main clk control */
118 	utmp = div_u64((u64)dev->cfg.clock * 0x80000, 1000000);
119 	buf[0] = (utmp >>  0) & 0xff;
120 	buf[1] = (utmp >>  8) & 0xff;
121 	buf[2] = (utmp >> 16) & 0xff;
122 	buf[3] = (utmp >> 24) & 0xff;
123 	ret = regmap_bulk_write(dev->regmap, 0x800025, buf, 4);
124 	if (ret)
125 		goto err;
126 
127 	dev_dbg(&client->dev, "clk=%u clk_cw=%08x\n", dev->cfg.clock, utmp);
128 
129 	/* ADC clk control */
130 	for (i = 0; i < ARRAY_SIZE(clock_adc_lut); i++) {
131 		if (clock_adc_lut[i].clock == dev->cfg.clock)
132 			break;
133 	}
134 	if (i == ARRAY_SIZE(clock_adc_lut)) {
135 		dev_err(&client->dev, "Couldn't find ADC config for clock %d\n",
136 			dev->cfg.clock);
137 		goto err;
138 	}
139 
140 	utmp = div_u64((u64)clock_adc_lut[i].adc * 0x80000, 1000000);
141 	buf[0] = (utmp >>  0) & 0xff;
142 	buf[1] = (utmp >>  8) & 0xff;
143 	buf[2] = (utmp >> 16) & 0xff;
144 	ret = regmap_bulk_write(dev->regmap, 0x80f1cd, buf, 3);
145 	if (ret)
146 		goto err;
147 
148 	dev_dbg(&client->dev, "adc=%u adc_cw=%06x\n",
149 		clock_adc_lut[i].adc, utmp);
150 
151 	/* Config register table */
152 	for (i = 0; i < ARRAY_SIZE(tab); i++) {
153 		ret = regmap_update_bits(dev->regmap, tab[i].reg, tab[i].mask,
154 					 tab[i].val);
155 		if (ret)
156 			goto err;
157 	}
158 
159 	/* Demod clk output */
160 	if (dev->cfg.dyn0_clk) {
161 		ret = regmap_write(dev->regmap, 0x80fba8, 0x00);
162 		if (ret)
163 			goto err;
164 	}
165 
166 	/* TS interface */
167 	if (dev->cfg.ts_mode == AF9033_TS_MODE_USB) {
168 		ret = regmap_update_bits(dev->regmap, 0x80f9a5, 0x01, 0x00);
169 		if (ret)
170 			goto err;
171 		ret = regmap_update_bits(dev->regmap, 0x80f9b5, 0x01, 0x01);
172 		if (ret)
173 			goto err;
174 	} else {
175 		ret = regmap_update_bits(dev->regmap, 0x80f990, 0x01, 0x00);
176 		if (ret)
177 			goto err;
178 		ret = regmap_update_bits(dev->regmap, 0x80f9b5, 0x01, 0x00);
179 		if (ret)
180 			goto err;
181 	}
182 
183 	/* Demod core settings */
184 	dev_dbg(&client->dev, "load ofsm settings\n");
185 	switch (dev->cfg.tuner) {
186 	case AF9033_TUNER_IT9135_38:
187 	case AF9033_TUNER_IT9135_51:
188 	case AF9033_TUNER_IT9135_52:
189 		len = ARRAY_SIZE(ofsm_init_it9135_v1);
190 		init = ofsm_init_it9135_v1;
191 		break;
192 	case AF9033_TUNER_IT9135_60:
193 	case AF9033_TUNER_IT9135_61:
194 	case AF9033_TUNER_IT9135_62:
195 		len = ARRAY_SIZE(ofsm_init_it9135_v2);
196 		init = ofsm_init_it9135_v2;
197 		break;
198 	default:
199 		len = ARRAY_SIZE(ofsm_init);
200 		init = ofsm_init;
201 		break;
202 	}
203 
204 	ret = af9033_wr_reg_val_tab(dev, init, len);
205 	if (ret)
206 		goto err;
207 
208 	/* Demod tuner specific settings */
209 	dev_dbg(&client->dev, "load tuner specific settings\n");
210 	switch (dev->cfg.tuner) {
211 	case AF9033_TUNER_TUA9001:
212 		len = ARRAY_SIZE(tuner_init_tua9001);
213 		init = tuner_init_tua9001;
214 		break;
215 	case AF9033_TUNER_FC0011:
216 		len = ARRAY_SIZE(tuner_init_fc0011);
217 		init = tuner_init_fc0011;
218 		break;
219 	case AF9033_TUNER_MXL5007T:
220 		len = ARRAY_SIZE(tuner_init_mxl5007t);
221 		init = tuner_init_mxl5007t;
222 		break;
223 	case AF9033_TUNER_TDA18218:
224 		len = ARRAY_SIZE(tuner_init_tda18218);
225 		init = tuner_init_tda18218;
226 		break;
227 	case AF9033_TUNER_FC2580:
228 		len = ARRAY_SIZE(tuner_init_fc2580);
229 		init = tuner_init_fc2580;
230 		break;
231 	case AF9033_TUNER_FC0012:
232 		len = ARRAY_SIZE(tuner_init_fc0012);
233 		init = tuner_init_fc0012;
234 		break;
235 	case AF9033_TUNER_IT9135_38:
236 		len = ARRAY_SIZE(tuner_init_it9135_38);
237 		init = tuner_init_it9135_38;
238 		break;
239 	case AF9033_TUNER_IT9135_51:
240 		len = ARRAY_SIZE(tuner_init_it9135_51);
241 		init = tuner_init_it9135_51;
242 		break;
243 	case AF9033_TUNER_IT9135_52:
244 		len = ARRAY_SIZE(tuner_init_it9135_52);
245 		init = tuner_init_it9135_52;
246 		break;
247 	case AF9033_TUNER_IT9135_60:
248 		len = ARRAY_SIZE(tuner_init_it9135_60);
249 		init = tuner_init_it9135_60;
250 		break;
251 	case AF9033_TUNER_IT9135_61:
252 		len = ARRAY_SIZE(tuner_init_it9135_61);
253 		init = tuner_init_it9135_61;
254 		break;
255 	case AF9033_TUNER_IT9135_62:
256 		len = ARRAY_SIZE(tuner_init_it9135_62);
257 		init = tuner_init_it9135_62;
258 		break;
259 	default:
260 		dev_dbg(&client->dev, "unsupported tuner ID=%d\n",
261 			dev->cfg.tuner);
262 		ret = -ENODEV;
263 		goto err;
264 	}
265 
266 	ret = af9033_wr_reg_val_tab(dev, init, len);
267 	if (ret)
268 		goto err;
269 
270 	if (dev->cfg.ts_mode == AF9033_TS_MODE_SERIAL) {
271 		ret = regmap_update_bits(dev->regmap, 0x00d91c, 0x01, 0x01);
272 		if (ret)
273 			goto err;
274 		ret = regmap_update_bits(dev->regmap, 0x00d917, 0x01, 0x00);
275 		if (ret)
276 			goto err;
277 		ret = regmap_update_bits(dev->regmap, 0x00d916, 0x01, 0x00);
278 		if (ret)
279 			goto err;
280 	}
281 
282 	switch (dev->cfg.tuner) {
283 	case AF9033_TUNER_IT9135_60:
284 	case AF9033_TUNER_IT9135_61:
285 	case AF9033_TUNER_IT9135_62:
286 		ret = regmap_write(dev->regmap, 0x800000, 0x01);
287 		if (ret)
288 			goto err;
289 	}
290 
291 	dev->bandwidth_hz = 0; /* Force to program all parameters */
292 	/* Init stats here in order signal app which stats are supported */
293 	c->strength.len = 1;
294 	c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
295 	c->cnr.len = 1;
296 	c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
297 	c->block_count.len = 1;
298 	c->block_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
299 	c->block_error.len = 1;
300 	c->block_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
301 	c->post_bit_count.len = 1;
302 	c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
303 	c->post_bit_error.len = 1;
304 	c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
305 
306 	return 0;
307 err:
308 	dev_dbg(&client->dev, "failed=%d\n", ret);
309 	return ret;
310 }
311 
312 static int af9033_sleep(struct dvb_frontend *fe)
313 {
314 	struct af9033_dev *dev = fe->demodulator_priv;
315 	struct i2c_client *client = dev->client;
316 	int ret;
317 	unsigned int utmp;
318 
319 	dev_dbg(&client->dev, "\n");
320 
321 	ret = regmap_write(dev->regmap, 0x80004c, 0x01);
322 	if (ret)
323 		goto err;
324 	ret = regmap_write(dev->regmap, 0x800000, 0x00);
325 	if (ret)
326 		goto err;
327 	ret = regmap_read_poll_timeout(dev->regmap, 0x80004c, utmp, utmp == 0,
328 				       5000, 1000000);
329 	if (ret)
330 		goto err;
331 	ret = regmap_update_bits(dev->regmap, 0x80fb24, 0x08, 0x08);
332 	if (ret)
333 		goto err;
334 
335 	/* Prevent current leak by setting TS interface to parallel mode */
336 	if (dev->cfg.ts_mode == AF9033_TS_MODE_SERIAL) {
337 		/* Enable parallel TS */
338 		ret = regmap_update_bits(dev->regmap, 0x00d917, 0x01, 0x00);
339 		if (ret)
340 			goto err;
341 		ret = regmap_update_bits(dev->regmap, 0x00d916, 0x01, 0x01);
342 		if (ret)
343 			goto err;
344 	}
345 
346 	return 0;
347 err:
348 	dev_dbg(&client->dev, "failed=%d\n", ret);
349 	return ret;
350 }
351 
352 static int af9033_get_tune_settings(struct dvb_frontend *fe,
353 				    struct dvb_frontend_tune_settings *fesettings)
354 {
355 	/* 800 => 2000 because IT9135 v2 is slow to gain lock */
356 	fesettings->min_delay_ms = 2000;
357 	fesettings->step_size = 0;
358 	fesettings->max_drift = 0;
359 
360 	return 0;
361 }
362 
363 static int af9033_set_frontend(struct dvb_frontend *fe)
364 {
365 	struct af9033_dev *dev = fe->demodulator_priv;
366 	struct i2c_client *client = dev->client;
367 	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
368 	int ret, i;
369 	unsigned int utmp, adc_freq;
370 	u8 tmp, buf[3], bandwidth_reg_val;
371 	u32 if_frequency;
372 
373 	dev_dbg(&client->dev, "frequency=%u bandwidth_hz=%u\n",
374 		c->frequency, c->bandwidth_hz);
375 
376 	/* Check bandwidth */
377 	switch (c->bandwidth_hz) {
378 	case 6000000:
379 		bandwidth_reg_val = 0x00;
380 		break;
381 	case 7000000:
382 		bandwidth_reg_val = 0x01;
383 		break;
384 	case 8000000:
385 		bandwidth_reg_val = 0x02;
386 		break;
387 	default:
388 		dev_dbg(&client->dev, "invalid bandwidth_hz\n");
389 		ret = -EINVAL;
390 		goto err;
391 	}
392 
393 	/* Program tuner */
394 	if (fe->ops.tuner_ops.set_params)
395 		fe->ops.tuner_ops.set_params(fe);
396 
397 	/* Coefficients */
398 	if (c->bandwidth_hz != dev->bandwidth_hz) {
399 		for (i = 0; i < ARRAY_SIZE(coeff_lut); i++) {
400 			if (coeff_lut[i].clock == dev->cfg.clock &&
401 			    coeff_lut[i].bandwidth_hz == c->bandwidth_hz) {
402 				break;
403 			}
404 		}
405 		if (i == ARRAY_SIZE(coeff_lut)) {
406 			dev_err(&client->dev,
407 				"Couldn't find config for clock %u\n",
408 				dev->cfg.clock);
409 			ret = -EINVAL;
410 			goto err;
411 		}
412 
413 		ret = regmap_bulk_write(dev->regmap, 0x800001, coeff_lut[i].val,
414 					sizeof(coeff_lut[i].val));
415 		if (ret)
416 			goto err;
417 	}
418 
419 	/* IF frequency control */
420 	if (c->bandwidth_hz != dev->bandwidth_hz) {
421 		for (i = 0; i < ARRAY_SIZE(clock_adc_lut); i++) {
422 			if (clock_adc_lut[i].clock == dev->cfg.clock)
423 				break;
424 		}
425 		if (i == ARRAY_SIZE(clock_adc_lut)) {
426 			dev_err(&client->dev,
427 				"Couldn't find ADC clock for clock %u\n",
428 				dev->cfg.clock);
429 			ret = -EINVAL;
430 			goto err;
431 		}
432 		adc_freq = clock_adc_lut[i].adc;
433 
434 		if (dev->cfg.adc_multiplier == AF9033_ADC_MULTIPLIER_2X)
435 			adc_freq = 2 * adc_freq;
436 
437 		/* Get used IF frequency */
438 		if (fe->ops.tuner_ops.get_if_frequency)
439 			fe->ops.tuner_ops.get_if_frequency(fe, &if_frequency);
440 		else
441 			if_frequency = 0;
442 
443 		utmp = DIV_ROUND_CLOSEST_ULL((u64)if_frequency * 0x800000,
444 					     adc_freq);
445 
446 		if (!dev->cfg.spec_inv && if_frequency)
447 			utmp = 0x800000 - utmp;
448 
449 		buf[0] = (utmp >>  0) & 0xff;
450 		buf[1] = (utmp >>  8) & 0xff;
451 		buf[2] = (utmp >> 16) & 0xff;
452 		ret = regmap_bulk_write(dev->regmap, 0x800029, buf, 3);
453 		if (ret)
454 			goto err;
455 
456 		dev_dbg(&client->dev, "if_frequency_cw=%06x\n", utmp);
457 
458 		dev->bandwidth_hz = c->bandwidth_hz;
459 	}
460 
461 	ret = regmap_update_bits(dev->regmap, 0x80f904, 0x03,
462 				 bandwidth_reg_val);
463 	if (ret)
464 		goto err;
465 	ret = regmap_write(dev->regmap, 0x800040, 0x00);
466 	if (ret)
467 		goto err;
468 	ret = regmap_write(dev->regmap, 0x800047, 0x00);
469 	if (ret)
470 		goto err;
471 	ret = regmap_update_bits(dev->regmap, 0x80f999, 0x01, 0x00);
472 	if (ret)
473 		goto err;
474 
475 	if (c->frequency <= 230000000)
476 		tmp = 0x00; /* VHF */
477 	else
478 		tmp = 0x01; /* UHF */
479 
480 	ret = regmap_write(dev->regmap, 0x80004b, tmp);
481 	if (ret)
482 		goto err;
483 	/* Reset FSM */
484 	ret = regmap_write(dev->regmap, 0x800000, 0x00);
485 	if (ret)
486 		goto err;
487 
488 	return 0;
489 err:
490 	dev_dbg(&client->dev, "failed=%d\n", ret);
491 	return ret;
492 }
493 
494 static int af9033_get_frontend(struct dvb_frontend *fe,
495 			       struct dtv_frontend_properties *c)
496 {
497 	struct af9033_dev *dev = fe->demodulator_priv;
498 	struct i2c_client *client = dev->client;
499 	int ret;
500 	u8 buf[8];
501 
502 	dev_dbg(&client->dev, "\n");
503 
504 	/* Read all needed TPS registers */
505 	ret = regmap_bulk_read(dev->regmap, 0x80f900, buf, 8);
506 	if (ret)
507 		goto err;
508 
509 	switch ((buf[0] >> 0) & 3) {
510 	case 0:
511 		c->transmission_mode = TRANSMISSION_MODE_2K;
512 		break;
513 	case 1:
514 		c->transmission_mode = TRANSMISSION_MODE_8K;
515 		break;
516 	}
517 
518 	switch ((buf[1] >> 0) & 3) {
519 	case 0:
520 		c->guard_interval = GUARD_INTERVAL_1_32;
521 		break;
522 	case 1:
523 		c->guard_interval = GUARD_INTERVAL_1_16;
524 		break;
525 	case 2:
526 		c->guard_interval = GUARD_INTERVAL_1_8;
527 		break;
528 	case 3:
529 		c->guard_interval = GUARD_INTERVAL_1_4;
530 		break;
531 	}
532 
533 	switch ((buf[2] >> 0) & 7) {
534 	case 0:
535 		c->hierarchy = HIERARCHY_NONE;
536 		break;
537 	case 1:
538 		c->hierarchy = HIERARCHY_1;
539 		break;
540 	case 2:
541 		c->hierarchy = HIERARCHY_2;
542 		break;
543 	case 3:
544 		c->hierarchy = HIERARCHY_4;
545 		break;
546 	}
547 
548 	switch ((buf[3] >> 0) & 3) {
549 	case 0:
550 		c->modulation = QPSK;
551 		break;
552 	case 1:
553 		c->modulation = QAM_16;
554 		break;
555 	case 2:
556 		c->modulation = QAM_64;
557 		break;
558 	}
559 
560 	switch ((buf[4] >> 0) & 3) {
561 	case 0:
562 		c->bandwidth_hz = 6000000;
563 		break;
564 	case 1:
565 		c->bandwidth_hz = 7000000;
566 		break;
567 	case 2:
568 		c->bandwidth_hz = 8000000;
569 		break;
570 	}
571 
572 	switch ((buf[6] >> 0) & 7) {
573 	case 0:
574 		c->code_rate_HP = FEC_1_2;
575 		break;
576 	case 1:
577 		c->code_rate_HP = FEC_2_3;
578 		break;
579 	case 2:
580 		c->code_rate_HP = FEC_3_4;
581 		break;
582 	case 3:
583 		c->code_rate_HP = FEC_5_6;
584 		break;
585 	case 4:
586 		c->code_rate_HP = FEC_7_8;
587 		break;
588 	case 5:
589 		c->code_rate_HP = FEC_NONE;
590 		break;
591 	}
592 
593 	switch ((buf[7] >> 0) & 7) {
594 	case 0:
595 		c->code_rate_LP = FEC_1_2;
596 		break;
597 	case 1:
598 		c->code_rate_LP = FEC_2_3;
599 		break;
600 	case 2:
601 		c->code_rate_LP = FEC_3_4;
602 		break;
603 	case 3:
604 		c->code_rate_LP = FEC_5_6;
605 		break;
606 	case 4:
607 		c->code_rate_LP = FEC_7_8;
608 		break;
609 	case 5:
610 		c->code_rate_LP = FEC_NONE;
611 		break;
612 	}
613 
614 	return 0;
615 err:
616 	dev_dbg(&client->dev, "failed=%d\n", ret);
617 	return ret;
618 }
619 
620 static int af9033_read_status(struct dvb_frontend *fe, enum fe_status *status)
621 {
622 	struct af9033_dev *dev = fe->demodulator_priv;
623 	struct i2c_client *client = dev->client;
624 	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
625 	int ret, tmp = 0;
626 	u8 buf[7];
627 	unsigned int utmp, utmp1;
628 
629 	dev_dbg(&client->dev, "\n");
630 
631 	*status = 0;
632 
633 	/* Radio channel status: 0=no result, 1=has signal, 2=no signal */
634 	ret = regmap_read(dev->regmap, 0x800047, &utmp);
635 	if (ret)
636 		goto err;
637 
638 	/* Has signal */
639 	if (utmp == 0x01)
640 		*status |= FE_HAS_SIGNAL;
641 
642 	if (utmp != 0x02) {
643 		/* TPS lock */
644 		ret = regmap_read(dev->regmap, 0x80f5a9, &utmp);
645 		if (ret)
646 			goto err;
647 
648 		if ((utmp >> 0) & 0x01)
649 			*status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
650 					FE_HAS_VITERBI;
651 
652 		/* Full lock */
653 		ret = regmap_read(dev->regmap, 0x80f999, &utmp);
654 		if (ret)
655 			goto err;
656 
657 		if ((utmp >> 0) & 0x01)
658 			*status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
659 					FE_HAS_VITERBI | FE_HAS_SYNC |
660 					FE_HAS_LOCK;
661 	}
662 
663 	dev->fe_status = *status;
664 
665 	/* Signal strength */
666 	if (dev->fe_status & FE_HAS_SIGNAL) {
667 		if (dev->is_af9035) {
668 			ret = regmap_read(dev->regmap, 0x80004a, &utmp);
669 			if (ret)
670 				goto err;
671 			tmp = -utmp * 1000;
672 		} else {
673 			ret = regmap_read(dev->regmap, 0x8000f7, &utmp);
674 			if (ret)
675 				goto err;
676 			tmp = (utmp - 100) * 1000;
677 		}
678 
679 		c->strength.len = 1;
680 		c->strength.stat[0].scale = FE_SCALE_DECIBEL;
681 		c->strength.stat[0].svalue = tmp;
682 	} else {
683 		c->strength.len = 1;
684 		c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
685 	}
686 
687 	/* CNR */
688 	if (dev->fe_status & FE_HAS_VITERBI) {
689 		/* Read raw SNR value */
690 		ret = regmap_bulk_read(dev->regmap, 0x80002c, buf, 3);
691 		if (ret)
692 			goto err;
693 
694 		utmp1 = buf[2] << 16 | buf[1] << 8 | buf[0] << 0;
695 
696 		/* Read superframe number */
697 		ret = regmap_read(dev->regmap, 0x80f78b, &utmp);
698 		if (ret)
699 			goto err;
700 
701 		if (utmp)
702 			utmp1 /= utmp;
703 
704 		/* Read current transmission mode */
705 		ret = regmap_read(dev->regmap, 0x80f900, &utmp);
706 		if (ret)
707 			goto err;
708 
709 		switch ((utmp >> 0) & 3) {
710 		case 0:
711 			/* 2k */
712 			utmp1 *= 4;
713 			break;
714 		case 1:
715 			/* 8k */
716 			utmp1 *= 1;
717 			break;
718 		case 2:
719 			/* 4k */
720 			utmp1 *= 2;
721 			break;
722 		default:
723 			utmp1 *= 0;
724 			break;
725 		}
726 
727 		/* Read current modulation */
728 		ret = regmap_read(dev->regmap, 0x80f903, &utmp);
729 		if (ret)
730 			goto err;
731 
732 		switch ((utmp >> 0) & 3) {
733 		case 0:
734 			/*
735 			 * QPSK
736 			 * CNR[dB] 13 * -log10((1690000 - value) / value) + 2.6
737 			 * value [653799, 1689999], 2.6 / 13 = 3355443
738 			 */
739 			utmp1 = clamp(utmp1, 653799U, 1689999U);
740 			utmp1 = ((u64)(intlog10(utmp1)
741 				 - intlog10(1690000 - utmp1)
742 				 + 3355443) * 13 * 1000) >> 24;
743 			break;
744 		case 1:
745 			/*
746 			 * QAM-16
747 			 * CNR[dB] 6 * log10((value - 370000) / (828000 - value)) + 15.7
748 			 * value [371105, 827999], 15.7 / 6 = 43900382
749 			 */
750 			utmp1 = clamp(utmp1, 371105U, 827999U);
751 			utmp1 = ((u64)(intlog10(utmp1 - 370000)
752 				 - intlog10(828000 - utmp1)
753 				 + 43900382) * 6 * 1000) >> 24;
754 			break;
755 		case 2:
756 			/*
757 			 * QAM-64
758 			 * CNR[dB] 8 * log10((value - 193000) / (425000 - value)) + 23.8
759 			 * value [193246, 424999], 23.8 / 8 = 49912218
760 			 */
761 			utmp1 = clamp(utmp1, 193246U, 424999U);
762 			utmp1 = ((u64)(intlog10(utmp1 - 193000)
763 				 - intlog10(425000 - utmp1)
764 				 + 49912218) * 8 * 1000) >> 24;
765 			break;
766 		default:
767 			utmp1 = 0;
768 			break;
769 		}
770 
771 		dev_dbg(&client->dev, "cnr=%u\n", utmp1);
772 
773 		c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
774 		c->cnr.stat[0].svalue = utmp1;
775 	} else {
776 		c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
777 	}
778 
779 	/* UCB/PER/BER */
780 	if (dev->fe_status & FE_HAS_LOCK) {
781 		/* Outer FEC, 204 byte packets */
782 		u16 abort_packet_count, rsd_packet_count;
783 		/* Inner FEC, bits */
784 		u32 rsd_bit_err_count;
785 
786 		/*
787 		 * Packet count used for measurement is 10000
788 		 * (rsd_packet_count). Maybe it should be increased?
789 		 */
790 
791 		ret = regmap_bulk_read(dev->regmap, 0x800032, buf, 7);
792 		if (ret)
793 			goto err;
794 
795 		abort_packet_count = (buf[1] << 8) | (buf[0] << 0);
796 		rsd_bit_err_count = (buf[4] << 16) | (buf[3] << 8) | buf[2];
797 		rsd_packet_count = (buf[6] << 8) | (buf[5] << 0);
798 
799 		dev->error_block_count += abort_packet_count;
800 		dev->total_block_count += rsd_packet_count;
801 		dev->post_bit_error += rsd_bit_err_count;
802 		dev->post_bit_count += rsd_packet_count * 204 * 8;
803 
804 		c->block_count.len = 1;
805 		c->block_count.stat[0].scale = FE_SCALE_COUNTER;
806 		c->block_count.stat[0].uvalue = dev->total_block_count;
807 
808 		c->block_error.len = 1;
809 		c->block_error.stat[0].scale = FE_SCALE_COUNTER;
810 		c->block_error.stat[0].uvalue = dev->error_block_count;
811 
812 		c->post_bit_count.len = 1;
813 		c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER;
814 		c->post_bit_count.stat[0].uvalue = dev->post_bit_count;
815 
816 		c->post_bit_error.len = 1;
817 		c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER;
818 		c->post_bit_error.stat[0].uvalue = dev->post_bit_error;
819 	}
820 
821 	return 0;
822 err:
823 	dev_dbg(&client->dev, "failed=%d\n", ret);
824 	return ret;
825 }
826 
827 static int af9033_read_snr(struct dvb_frontend *fe, u16 *snr)
828 {
829 	struct af9033_dev *dev = fe->demodulator_priv;
830 	struct i2c_client *client = dev->client;
831 	struct dtv_frontend_properties *c = &dev->fe.dtv_property_cache;
832 	int ret;
833 	unsigned int utmp;
834 
835 	dev_dbg(&client->dev, "\n");
836 
837 	/* Use DVBv5 CNR */
838 	if (c->cnr.stat[0].scale == FE_SCALE_DECIBEL) {
839 		/* Return 0.1 dB for AF9030 and 0-0xffff for IT9130. */
840 		if (dev->is_af9035) {
841 			/* 1000x => 10x (0.1 dB) */
842 			*snr = div_s64(c->cnr.stat[0].svalue, 100);
843 		} else {
844 			/* 1000x => 1x (1 dB) */
845 			*snr = div_s64(c->cnr.stat[0].svalue, 1000);
846 
847 			/* Read current modulation */
848 			ret = regmap_read(dev->regmap, 0x80f903, &utmp);
849 			if (ret)
850 				goto err;
851 
852 			/* scale value to 0x0000-0xffff */
853 			switch ((utmp >> 0) & 3) {
854 			case 0:
855 				*snr = *snr * 0xffff / 23;
856 				break;
857 			case 1:
858 				*snr = *snr * 0xffff / 26;
859 				break;
860 			case 2:
861 				*snr = *snr * 0xffff / 32;
862 				break;
863 			default:
864 				goto err;
865 			}
866 		}
867 	} else {
868 		*snr = 0;
869 	}
870 
871 	return 0;
872 err:
873 	dev_dbg(&client->dev, "failed=%d\n", ret);
874 	return ret;
875 }
876 
877 static int af9033_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
878 {
879 	struct af9033_dev *dev = fe->demodulator_priv;
880 	struct i2c_client *client = dev->client;
881 	struct dtv_frontend_properties *c = &dev->fe.dtv_property_cache;
882 	int ret, tmp, power_real;
883 	unsigned int utmp;
884 	u8 gain_offset, buf[7];
885 
886 	dev_dbg(&client->dev, "\n");
887 
888 	if (dev->is_af9035) {
889 		/* Read signal strength of 0-100 scale */
890 		ret = regmap_read(dev->regmap, 0x800048, &utmp);
891 		if (ret)
892 			goto err;
893 
894 		/* Scale value to 0x0000-0xffff */
895 		*strength = utmp * 0xffff / 100;
896 	} else {
897 		ret = regmap_read(dev->regmap, 0x8000f7, &utmp);
898 		if (ret)
899 			goto err;
900 
901 		ret = regmap_bulk_read(dev->regmap, 0x80f900, buf, 7);
902 		if (ret)
903 			goto err;
904 
905 		if (c->frequency <= 300000000)
906 			gain_offset = 7; /* VHF */
907 		else
908 			gain_offset = 4; /* UHF */
909 
910 		power_real = (utmp - 100 - gain_offset) -
911 			power_reference[((buf[3] >> 0) & 3)][((buf[6] >> 0) & 7)];
912 
913 		if (power_real < -15)
914 			tmp = 0;
915 		else if ((power_real >= -15) && (power_real < 0))
916 			tmp = (2 * (power_real + 15)) / 3;
917 		else if ((power_real >= 0) && (power_real < 20))
918 			tmp = 4 * power_real + 10;
919 		else if ((power_real >= 20) && (power_real < 35))
920 			tmp = (2 * (power_real - 20)) / 3 + 90;
921 		else
922 			tmp = 100;
923 
924 		/* Scale value to 0x0000-0xffff */
925 		*strength = tmp * 0xffff / 100;
926 	}
927 
928 	return 0;
929 err:
930 	dev_dbg(&client->dev, "failed=%d\n", ret);
931 	return ret;
932 }
933 
934 static int af9033_read_ber(struct dvb_frontend *fe, u32 *ber)
935 {
936 	struct af9033_dev *dev = fe->demodulator_priv;
937 
938 	*ber = (dev->post_bit_error - dev->post_bit_error_prev);
939 	dev->post_bit_error_prev = dev->post_bit_error;
940 
941 	return 0;
942 }
943 
944 static int af9033_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
945 {
946 	struct af9033_dev *dev = fe->demodulator_priv;
947 
948 	*ucblocks = dev->error_block_count;
949 
950 	return 0;
951 }
952 
953 static int af9033_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
954 {
955 	struct af9033_dev *dev = fe->demodulator_priv;
956 	struct i2c_client *client = dev->client;
957 	int ret;
958 
959 	dev_dbg(&client->dev, "enable=%d\n", enable);
960 
961 	ret = regmap_update_bits(dev->regmap, 0x00fa04, 0x01, enable);
962 	if (ret)
963 		goto err;
964 
965 	return 0;
966 err:
967 	dev_dbg(&client->dev, "failed=%d\n", ret);
968 	return ret;
969 }
970 
971 static int af9033_pid_filter_ctrl(struct dvb_frontend *fe, int onoff)
972 {
973 	struct af9033_dev *dev = fe->demodulator_priv;
974 	struct i2c_client *client = dev->client;
975 	int ret;
976 
977 	dev_dbg(&client->dev, "onoff=%d\n", onoff);
978 
979 	ret = regmap_update_bits(dev->regmap, 0x80f993, 0x01, onoff);
980 	if (ret)
981 		goto err;
982 
983 	return 0;
984 err:
985 	dev_dbg(&client->dev, "failed=%d\n", ret);
986 	return ret;
987 }
988 
989 static int af9033_pid_filter(struct dvb_frontend *fe, int index, u16 pid,
990 			     int onoff)
991 {
992 	struct af9033_dev *dev = fe->demodulator_priv;
993 	struct i2c_client *client = dev->client;
994 	int ret;
995 	u8 wbuf[2] = {(pid >> 0) & 0xff, (pid >> 8) & 0xff};
996 
997 	dev_dbg(&client->dev, "index=%d pid=%04x onoff=%d\n",
998 		index, pid, onoff);
999 
1000 	if (pid > 0x1fff)
1001 		return 0;
1002 
1003 	ret = regmap_bulk_write(dev->regmap, 0x80f996, wbuf, 2);
1004 	if (ret)
1005 		goto err;
1006 	ret = regmap_write(dev->regmap, 0x80f994, onoff);
1007 	if (ret)
1008 		goto err;
1009 	ret = regmap_write(dev->regmap, 0x80f995, index);
1010 	if (ret)
1011 		goto err;
1012 
1013 	return 0;
1014 err:
1015 	dev_dbg(&client->dev, "failed=%d\n", ret);
1016 	return ret;
1017 }
1018 
1019 static const struct dvb_frontend_ops af9033_ops = {
1020 	.delsys = {SYS_DVBT},
1021 	.info = {
1022 		.name = "Afatech AF9033 (DVB-T)",
1023 		.frequency_min = 174000000,
1024 		.frequency_max = 862000000,
1025 		.frequency_stepsize = 250000,
1026 		.frequency_tolerance = 0,
1027 		.caps =	FE_CAN_FEC_1_2 |
1028 			FE_CAN_FEC_2_3 |
1029 			FE_CAN_FEC_3_4 |
1030 			FE_CAN_FEC_5_6 |
1031 			FE_CAN_FEC_7_8 |
1032 			FE_CAN_FEC_AUTO |
1033 			FE_CAN_QPSK |
1034 			FE_CAN_QAM_16 |
1035 			FE_CAN_QAM_64 |
1036 			FE_CAN_QAM_AUTO |
1037 			FE_CAN_TRANSMISSION_MODE_AUTO |
1038 			FE_CAN_GUARD_INTERVAL_AUTO |
1039 			FE_CAN_HIERARCHY_AUTO |
1040 			FE_CAN_RECOVER |
1041 			FE_CAN_MUTE_TS
1042 	},
1043 
1044 	.init = af9033_init,
1045 	.sleep = af9033_sleep,
1046 
1047 	.get_tune_settings = af9033_get_tune_settings,
1048 	.set_frontend = af9033_set_frontend,
1049 	.get_frontend = af9033_get_frontend,
1050 
1051 	.read_status = af9033_read_status,
1052 	.read_snr = af9033_read_snr,
1053 	.read_signal_strength = af9033_read_signal_strength,
1054 	.read_ber = af9033_read_ber,
1055 	.read_ucblocks = af9033_read_ucblocks,
1056 
1057 	.i2c_gate_ctrl = af9033_i2c_gate_ctrl,
1058 };
1059 
1060 static int af9033_probe(struct i2c_client *client,
1061 			const struct i2c_device_id *id)
1062 {
1063 	struct af9033_config *cfg = client->dev.platform_data;
1064 	struct af9033_dev *dev;
1065 	int ret;
1066 	u8 buf[8];
1067 	u32 reg;
1068 	static const struct regmap_config regmap_config = {
1069 		.reg_bits    =  24,
1070 		.val_bits    =  8,
1071 	};
1072 
1073 	/* Allocate memory for the internal state */
1074 	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1075 	if (!dev) {
1076 		ret = -ENOMEM;
1077 		goto err;
1078 	}
1079 
1080 	/* Setup the state */
1081 	dev->client = client;
1082 	memcpy(&dev->cfg, cfg, sizeof(dev->cfg));
1083 	switch (dev->cfg.ts_mode) {
1084 	case AF9033_TS_MODE_PARALLEL:
1085 		dev->ts_mode_parallel = true;
1086 		break;
1087 	case AF9033_TS_MODE_SERIAL:
1088 		dev->ts_mode_serial = true;
1089 		break;
1090 	case AF9033_TS_MODE_USB:
1091 		/* USB mode for AF9035 */
1092 	default:
1093 		break;
1094 	}
1095 
1096 	if (dev->cfg.clock != 12000000) {
1097 		ret = -ENODEV;
1098 		dev_err(&client->dev,
1099 			"Unsupported clock %u Hz. Only 12000000 Hz is supported currently\n",
1100 			dev->cfg.clock);
1101 		goto err_kfree;
1102 	}
1103 
1104 	/* Create regmap */
1105 	dev->regmap = regmap_init_i2c(client, &regmap_config);
1106 	if (IS_ERR(dev->regmap)) {
1107 		ret = PTR_ERR(dev->regmap);
1108 		goto err_kfree;
1109 	}
1110 
1111 	/* Firmware version */
1112 	switch (dev->cfg.tuner) {
1113 	case AF9033_TUNER_IT9135_38:
1114 	case AF9033_TUNER_IT9135_51:
1115 	case AF9033_TUNER_IT9135_52:
1116 	case AF9033_TUNER_IT9135_60:
1117 	case AF9033_TUNER_IT9135_61:
1118 	case AF9033_TUNER_IT9135_62:
1119 		dev->is_it9135 = true;
1120 		reg = 0x004bfc;
1121 		break;
1122 	default:
1123 		dev->is_af9035 = true;
1124 		reg = 0x0083e9;
1125 		break;
1126 	}
1127 
1128 	ret = regmap_bulk_read(dev->regmap, reg, &buf[0], 4);
1129 	if (ret)
1130 		goto err_regmap_exit;
1131 	ret = regmap_bulk_read(dev->regmap, 0x804191, &buf[4], 4);
1132 	if (ret)
1133 		goto err_regmap_exit;
1134 
1135 	dev_info(&client->dev,
1136 		 "firmware version: LINK %d.%d.%d.%d - OFDM %d.%d.%d.%d\n",
1137 		 buf[0], buf[1], buf[2], buf[3],
1138 		 buf[4], buf[5], buf[6], buf[7]);
1139 
1140 	/* Sleep as chip seems to be partly active by default */
1141 	switch (dev->cfg.tuner) {
1142 	case AF9033_TUNER_IT9135_38:
1143 	case AF9033_TUNER_IT9135_51:
1144 	case AF9033_TUNER_IT9135_52:
1145 	case AF9033_TUNER_IT9135_60:
1146 	case AF9033_TUNER_IT9135_61:
1147 	case AF9033_TUNER_IT9135_62:
1148 		/* IT9135 did not like to sleep at that early */
1149 		break;
1150 	default:
1151 		ret = regmap_write(dev->regmap, 0x80004c, 0x01);
1152 		if (ret)
1153 			goto err_regmap_exit;
1154 		ret = regmap_write(dev->regmap, 0x800000, 0x00);
1155 		if (ret)
1156 			goto err_regmap_exit;
1157 	}
1158 
1159 	/* Create dvb frontend */
1160 	memcpy(&dev->fe.ops, &af9033_ops, sizeof(dev->fe.ops));
1161 	dev->fe.demodulator_priv = dev;
1162 	*cfg->fe = &dev->fe;
1163 	if (cfg->ops) {
1164 		cfg->ops->pid_filter = af9033_pid_filter;
1165 		cfg->ops->pid_filter_ctrl = af9033_pid_filter_ctrl;
1166 	}
1167 	cfg->regmap = dev->regmap;
1168 	i2c_set_clientdata(client, dev);
1169 
1170 	dev_info(&client->dev, "Afatech AF9033 successfully attached\n");
1171 
1172 	return 0;
1173 err_regmap_exit:
1174 	regmap_exit(dev->regmap);
1175 err_kfree:
1176 	kfree(dev);
1177 err:
1178 	dev_dbg(&client->dev, "failed=%d\n", ret);
1179 	return ret;
1180 }
1181 
1182 static int af9033_remove(struct i2c_client *client)
1183 {
1184 	struct af9033_dev *dev = i2c_get_clientdata(client);
1185 
1186 	dev_dbg(&client->dev, "\n");
1187 
1188 	regmap_exit(dev->regmap);
1189 	kfree(dev);
1190 
1191 	return 0;
1192 }
1193 
1194 static const struct i2c_device_id af9033_id_table[] = {
1195 	{"af9033", 0},
1196 	{}
1197 };
1198 MODULE_DEVICE_TABLE(i2c, af9033_id_table);
1199 
1200 static struct i2c_driver af9033_driver = {
1201 	.driver = {
1202 		.name	= "af9033",
1203 		.suppress_bind_attrs	= true,
1204 	},
1205 	.probe		= af9033_probe,
1206 	.remove		= af9033_remove,
1207 	.id_table	= af9033_id_table,
1208 };
1209 
1210 module_i2c_driver(af9033_driver);
1211 
1212 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
1213 MODULE_DESCRIPTION("Afatech AF9033 DVB-T demodulator driver");
1214 MODULE_LICENSE("GPL");
1215