1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * Afatech AF9033 demodulator driver
4  *
5  * Copyright (C) 2009 Antti Palosaari <crope@iki.fi>
6  * Copyright (C) 2012 Antti Palosaari <crope@iki.fi>
7  */
8 
9 #include "af9033_priv.h"
10 
11 struct af9033_dev {
12 	struct i2c_client *client;
13 	struct regmap *regmap;
14 	struct dvb_frontend fe;
15 	struct af9033_config cfg;
16 	bool is_af9035;
17 	bool is_it9135;
18 
19 	u32 bandwidth_hz;
20 	bool ts_mode_parallel;
21 	bool ts_mode_serial;
22 
23 	enum fe_status fe_status;
24 	u64 post_bit_error_prev; /* for old read_ber we return (curr - prev) */
25 	u64 post_bit_error;
26 	u64 post_bit_count;
27 	u64 error_block_count;
28 	u64 total_block_count;
29 };
30 
31 /* Write reg val table using reg addr auto increment */
32 static int af9033_wr_reg_val_tab(struct af9033_dev *dev,
33 				 const struct reg_val *tab, int tab_len)
34 {
35 	struct i2c_client *client = dev->client;
36 #define MAX_TAB_LEN 212
37 	int ret, i, j;
38 	u8 buf[1 + MAX_TAB_LEN];
39 
40 	dev_dbg(&client->dev, "tab_len=%d\n", tab_len);
41 
42 	if (tab_len > sizeof(buf)) {
43 		dev_warn(&client->dev, "tab len %d is too big\n", tab_len);
44 		return -EINVAL;
45 	}
46 
47 	for (i = 0, j = 0; i < tab_len; i++) {
48 		buf[j] = tab[i].val;
49 
50 		if (i == tab_len - 1 || tab[i].reg != tab[i + 1].reg - 1) {
51 			ret = regmap_bulk_write(dev->regmap, tab[i].reg - j,
52 						buf, j + 1);
53 			if (ret)
54 				goto err;
55 
56 			j = 0;
57 		} else {
58 			j++;
59 		}
60 	}
61 
62 	return 0;
63 err:
64 	dev_dbg(&client->dev, "failed=%d\n", ret);
65 	return ret;
66 }
67 
68 static int af9033_init(struct dvb_frontend *fe)
69 {
70 	struct af9033_dev *dev = fe->demodulator_priv;
71 	struct i2c_client *client = dev->client;
72 	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
73 	int ret, i, len;
74 	unsigned int utmp;
75 	const struct reg_val *init;
76 	u8 buf[4];
77 	struct reg_val_mask tab[] = {
78 		{ 0x80fb24, 0x00, 0x08 },
79 		{ 0x80004c, 0x00, 0xff },
80 		{ 0x00f641, dev->cfg.tuner, 0xff },
81 		{ 0x80f5ca, 0x01, 0x01 },
82 		{ 0x80f715, 0x01, 0x01 },
83 		{ 0x00f41f, 0x04, 0x04 },
84 		{ 0x00f41a, 0x01, 0x01 },
85 		{ 0x80f731, 0x00, 0x01 },
86 		{ 0x00d91e, 0x00, 0x01 },
87 		{ 0x00d919, 0x00, 0x01 },
88 		{ 0x80f732, 0x00, 0x01 },
89 		{ 0x00d91f, 0x00, 0x01 },
90 		{ 0x00d91a, 0x00, 0x01 },
91 		{ 0x80f730, 0x00, 0x01 },
92 		{ 0x80f778, 0x00, 0xff },
93 		{ 0x80f73c, 0x01, 0x01 },
94 		{ 0x80f776, 0x00, 0x01 },
95 		{ 0x00d8fd, 0x01, 0xff },
96 		{ 0x00d830, 0x01, 0xff },
97 		{ 0x00d831, 0x00, 0xff },
98 		{ 0x00d832, 0x00, 0xff },
99 		{ 0x80f985, dev->ts_mode_serial, 0x01 },
100 		{ 0x80f986, dev->ts_mode_parallel, 0x01 },
101 		{ 0x00d827, 0x00, 0xff },
102 		{ 0x00d829, 0x00, 0xff },
103 		{ 0x800045, dev->cfg.adc_multiplier, 0xff },
104 	};
105 
106 	dev_dbg(&client->dev, "\n");
107 
108 	/* Main clk control */
109 	utmp = div_u64((u64)dev->cfg.clock * 0x80000, 1000000);
110 	buf[0] = (utmp >>  0) & 0xff;
111 	buf[1] = (utmp >>  8) & 0xff;
112 	buf[2] = (utmp >> 16) & 0xff;
113 	buf[3] = (utmp >> 24) & 0xff;
114 	ret = regmap_bulk_write(dev->regmap, 0x800025, buf, 4);
115 	if (ret)
116 		goto err;
117 
118 	dev_dbg(&client->dev, "clk=%u clk_cw=%08x\n", dev->cfg.clock, utmp);
119 
120 	/* ADC clk control */
121 	for (i = 0; i < ARRAY_SIZE(clock_adc_lut); i++) {
122 		if (clock_adc_lut[i].clock == dev->cfg.clock)
123 			break;
124 	}
125 	if (i == ARRAY_SIZE(clock_adc_lut)) {
126 		dev_err(&client->dev, "Couldn't find ADC config for clock %d\n",
127 			dev->cfg.clock);
128 		ret = -ENODEV;
129 		goto err;
130 	}
131 
132 	utmp = div_u64((u64)clock_adc_lut[i].adc * 0x80000, 1000000);
133 	buf[0] = (utmp >>  0) & 0xff;
134 	buf[1] = (utmp >>  8) & 0xff;
135 	buf[2] = (utmp >> 16) & 0xff;
136 	ret = regmap_bulk_write(dev->regmap, 0x80f1cd, buf, 3);
137 	if (ret)
138 		goto err;
139 
140 	dev_dbg(&client->dev, "adc=%u adc_cw=%06x\n",
141 		clock_adc_lut[i].adc, utmp);
142 
143 	/* Config register table */
144 	for (i = 0; i < ARRAY_SIZE(tab); i++) {
145 		ret = regmap_update_bits(dev->regmap, tab[i].reg, tab[i].mask,
146 					 tab[i].val);
147 		if (ret)
148 			goto err;
149 	}
150 
151 	/* Demod clk output */
152 	if (dev->cfg.dyn0_clk) {
153 		ret = regmap_write(dev->regmap, 0x80fba8, 0x00);
154 		if (ret)
155 			goto err;
156 	}
157 
158 	/* TS interface */
159 	if (dev->cfg.ts_mode == AF9033_TS_MODE_USB) {
160 		ret = regmap_update_bits(dev->regmap, 0x80f9a5, 0x01, 0x00);
161 		if (ret)
162 			goto err;
163 		ret = regmap_update_bits(dev->regmap, 0x80f9b5, 0x01, 0x01);
164 		if (ret)
165 			goto err;
166 	} else {
167 		ret = regmap_update_bits(dev->regmap, 0x80f990, 0x01, 0x00);
168 		if (ret)
169 			goto err;
170 		ret = regmap_update_bits(dev->regmap, 0x80f9b5, 0x01, 0x00);
171 		if (ret)
172 			goto err;
173 	}
174 
175 	/* Demod core settings */
176 	dev_dbg(&client->dev, "load ofsm settings\n");
177 	switch (dev->cfg.tuner) {
178 	case AF9033_TUNER_IT9135_38:
179 	case AF9033_TUNER_IT9135_51:
180 	case AF9033_TUNER_IT9135_52:
181 		len = ARRAY_SIZE(ofsm_init_it9135_v1);
182 		init = ofsm_init_it9135_v1;
183 		break;
184 	case AF9033_TUNER_IT9135_60:
185 	case AF9033_TUNER_IT9135_61:
186 	case AF9033_TUNER_IT9135_62:
187 		len = ARRAY_SIZE(ofsm_init_it9135_v2);
188 		init = ofsm_init_it9135_v2;
189 		break;
190 	default:
191 		len = ARRAY_SIZE(ofsm_init);
192 		init = ofsm_init;
193 		break;
194 	}
195 
196 	ret = af9033_wr_reg_val_tab(dev, init, len);
197 	if (ret)
198 		goto err;
199 
200 	/* Demod tuner specific settings */
201 	dev_dbg(&client->dev, "load tuner specific settings\n");
202 	switch (dev->cfg.tuner) {
203 	case AF9033_TUNER_TUA9001:
204 		len = ARRAY_SIZE(tuner_init_tua9001);
205 		init = tuner_init_tua9001;
206 		break;
207 	case AF9033_TUNER_FC0011:
208 		len = ARRAY_SIZE(tuner_init_fc0011);
209 		init = tuner_init_fc0011;
210 		break;
211 	case AF9033_TUNER_MXL5007T:
212 		len = ARRAY_SIZE(tuner_init_mxl5007t);
213 		init = tuner_init_mxl5007t;
214 		break;
215 	case AF9033_TUNER_TDA18218:
216 		len = ARRAY_SIZE(tuner_init_tda18218);
217 		init = tuner_init_tda18218;
218 		break;
219 	case AF9033_TUNER_FC2580:
220 		len = ARRAY_SIZE(tuner_init_fc2580);
221 		init = tuner_init_fc2580;
222 		break;
223 	case AF9033_TUNER_FC0012:
224 		len = ARRAY_SIZE(tuner_init_fc0012);
225 		init = tuner_init_fc0012;
226 		break;
227 	case AF9033_TUNER_IT9135_38:
228 		len = ARRAY_SIZE(tuner_init_it9135_38);
229 		init = tuner_init_it9135_38;
230 		break;
231 	case AF9033_TUNER_IT9135_51:
232 		len = ARRAY_SIZE(tuner_init_it9135_51);
233 		init = tuner_init_it9135_51;
234 		break;
235 	case AF9033_TUNER_IT9135_52:
236 		len = ARRAY_SIZE(tuner_init_it9135_52);
237 		init = tuner_init_it9135_52;
238 		break;
239 	case AF9033_TUNER_IT9135_60:
240 		len = ARRAY_SIZE(tuner_init_it9135_60);
241 		init = tuner_init_it9135_60;
242 		break;
243 	case AF9033_TUNER_IT9135_61:
244 		len = ARRAY_SIZE(tuner_init_it9135_61);
245 		init = tuner_init_it9135_61;
246 		break;
247 	case AF9033_TUNER_IT9135_62:
248 		len = ARRAY_SIZE(tuner_init_it9135_62);
249 		init = tuner_init_it9135_62;
250 		break;
251 	default:
252 		dev_dbg(&client->dev, "unsupported tuner ID=%d\n",
253 			dev->cfg.tuner);
254 		ret = -ENODEV;
255 		goto err;
256 	}
257 
258 	ret = af9033_wr_reg_val_tab(dev, init, len);
259 	if (ret)
260 		goto err;
261 
262 	if (dev->cfg.ts_mode == AF9033_TS_MODE_SERIAL) {
263 		ret = regmap_update_bits(dev->regmap, 0x00d91c, 0x01, 0x01);
264 		if (ret)
265 			goto err;
266 		ret = regmap_update_bits(dev->regmap, 0x00d917, 0x01, 0x00);
267 		if (ret)
268 			goto err;
269 		ret = regmap_update_bits(dev->regmap, 0x00d916, 0x01, 0x00);
270 		if (ret)
271 			goto err;
272 	}
273 
274 	switch (dev->cfg.tuner) {
275 	case AF9033_TUNER_IT9135_60:
276 	case AF9033_TUNER_IT9135_61:
277 	case AF9033_TUNER_IT9135_62:
278 		ret = regmap_write(dev->regmap, 0x800000, 0x01);
279 		if (ret)
280 			goto err;
281 	}
282 
283 	dev->bandwidth_hz = 0; /* Force to program all parameters */
284 	/* Init stats here in order signal app which stats are supported */
285 	c->strength.len = 1;
286 	c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
287 	c->cnr.len = 1;
288 	c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
289 	c->block_count.len = 1;
290 	c->block_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
291 	c->block_error.len = 1;
292 	c->block_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
293 	c->post_bit_count.len = 1;
294 	c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
295 	c->post_bit_error.len = 1;
296 	c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
297 
298 	return 0;
299 err:
300 	dev_dbg(&client->dev, "failed=%d\n", ret);
301 	return ret;
302 }
303 
304 static int af9033_sleep(struct dvb_frontend *fe)
305 {
306 	struct af9033_dev *dev = fe->demodulator_priv;
307 	struct i2c_client *client = dev->client;
308 	int ret;
309 	unsigned int utmp;
310 
311 	dev_dbg(&client->dev, "\n");
312 
313 	ret = regmap_write(dev->regmap, 0x80004c, 0x01);
314 	if (ret)
315 		goto err;
316 	ret = regmap_write(dev->regmap, 0x800000, 0x00);
317 	if (ret)
318 		goto err;
319 	ret = regmap_read_poll_timeout(dev->regmap, 0x80004c, utmp, utmp == 0,
320 				       5000, 1000000);
321 	if (ret)
322 		goto err;
323 	ret = regmap_update_bits(dev->regmap, 0x80fb24, 0x08, 0x08);
324 	if (ret)
325 		goto err;
326 
327 	/* Prevent current leak by setting TS interface to parallel mode */
328 	if (dev->cfg.ts_mode == AF9033_TS_MODE_SERIAL) {
329 		/* Enable parallel TS */
330 		ret = regmap_update_bits(dev->regmap, 0x00d917, 0x01, 0x00);
331 		if (ret)
332 			goto err;
333 		ret = regmap_update_bits(dev->regmap, 0x00d916, 0x01, 0x01);
334 		if (ret)
335 			goto err;
336 	}
337 
338 	return 0;
339 err:
340 	dev_dbg(&client->dev, "failed=%d\n", ret);
341 	return ret;
342 }
343 
344 static int af9033_get_tune_settings(struct dvb_frontend *fe,
345 				    struct dvb_frontend_tune_settings *fesettings)
346 {
347 	/* 800 => 2000 because IT9135 v2 is slow to gain lock */
348 	fesettings->min_delay_ms = 2000;
349 	fesettings->step_size = 0;
350 	fesettings->max_drift = 0;
351 
352 	return 0;
353 }
354 
355 static int af9033_set_frontend(struct dvb_frontend *fe)
356 {
357 	struct af9033_dev *dev = fe->demodulator_priv;
358 	struct i2c_client *client = dev->client;
359 	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
360 	int ret, i;
361 	unsigned int utmp, adc_freq;
362 	u8 tmp, buf[3], bandwidth_reg_val;
363 	u32 if_frequency;
364 
365 	dev_dbg(&client->dev, "frequency=%u bandwidth_hz=%u\n",
366 		c->frequency, c->bandwidth_hz);
367 
368 	/* Check bandwidth */
369 	switch (c->bandwidth_hz) {
370 	case 6000000:
371 		bandwidth_reg_val = 0x00;
372 		break;
373 	case 7000000:
374 		bandwidth_reg_val = 0x01;
375 		break;
376 	case 8000000:
377 		bandwidth_reg_val = 0x02;
378 		break;
379 	default:
380 		dev_dbg(&client->dev, "invalid bandwidth_hz\n");
381 		ret = -EINVAL;
382 		goto err;
383 	}
384 
385 	/* Program tuner */
386 	if (fe->ops.tuner_ops.set_params)
387 		fe->ops.tuner_ops.set_params(fe);
388 
389 	/* Coefficients */
390 	if (c->bandwidth_hz != dev->bandwidth_hz) {
391 		for (i = 0; i < ARRAY_SIZE(coeff_lut); i++) {
392 			if (coeff_lut[i].clock == dev->cfg.clock &&
393 			    coeff_lut[i].bandwidth_hz == c->bandwidth_hz) {
394 				break;
395 			}
396 		}
397 		if (i == ARRAY_SIZE(coeff_lut)) {
398 			dev_err(&client->dev,
399 				"Couldn't find config for clock %u\n",
400 				dev->cfg.clock);
401 			ret = -EINVAL;
402 			goto err;
403 		}
404 
405 		ret = regmap_bulk_write(dev->regmap, 0x800001, coeff_lut[i].val,
406 					sizeof(coeff_lut[i].val));
407 		if (ret)
408 			goto err;
409 	}
410 
411 	/* IF frequency control */
412 	if (c->bandwidth_hz != dev->bandwidth_hz) {
413 		for (i = 0; i < ARRAY_SIZE(clock_adc_lut); i++) {
414 			if (clock_adc_lut[i].clock == dev->cfg.clock)
415 				break;
416 		}
417 		if (i == ARRAY_SIZE(clock_adc_lut)) {
418 			dev_err(&client->dev,
419 				"Couldn't find ADC clock for clock %u\n",
420 				dev->cfg.clock);
421 			ret = -EINVAL;
422 			goto err;
423 		}
424 		adc_freq = clock_adc_lut[i].adc;
425 
426 		if (dev->cfg.adc_multiplier == AF9033_ADC_MULTIPLIER_2X)
427 			adc_freq = 2 * adc_freq;
428 
429 		/* Get used IF frequency */
430 		if (fe->ops.tuner_ops.get_if_frequency)
431 			fe->ops.tuner_ops.get_if_frequency(fe, &if_frequency);
432 		else
433 			if_frequency = 0;
434 
435 		utmp = DIV_ROUND_CLOSEST_ULL((u64)if_frequency * 0x800000,
436 					     adc_freq);
437 
438 		if (!dev->cfg.spec_inv && if_frequency)
439 			utmp = 0x800000 - utmp;
440 
441 		buf[0] = (utmp >>  0) & 0xff;
442 		buf[1] = (utmp >>  8) & 0xff;
443 		buf[2] = (utmp >> 16) & 0xff;
444 		ret = regmap_bulk_write(dev->regmap, 0x800029, buf, 3);
445 		if (ret)
446 			goto err;
447 
448 		dev_dbg(&client->dev, "if_frequency_cw=%06x\n", utmp);
449 
450 		dev->bandwidth_hz = c->bandwidth_hz;
451 	}
452 
453 	ret = regmap_update_bits(dev->regmap, 0x80f904, 0x03,
454 				 bandwidth_reg_val);
455 	if (ret)
456 		goto err;
457 	ret = regmap_write(dev->regmap, 0x800040, 0x00);
458 	if (ret)
459 		goto err;
460 	ret = regmap_write(dev->regmap, 0x800047, 0x00);
461 	if (ret)
462 		goto err;
463 	ret = regmap_update_bits(dev->regmap, 0x80f999, 0x01, 0x00);
464 	if (ret)
465 		goto err;
466 
467 	if (c->frequency <= 230000000)
468 		tmp = 0x00; /* VHF */
469 	else
470 		tmp = 0x01; /* UHF */
471 
472 	ret = regmap_write(dev->regmap, 0x80004b, tmp);
473 	if (ret)
474 		goto err;
475 	/* Reset FSM */
476 	ret = regmap_write(dev->regmap, 0x800000, 0x00);
477 	if (ret)
478 		goto err;
479 
480 	return 0;
481 err:
482 	dev_dbg(&client->dev, "failed=%d\n", ret);
483 	return ret;
484 }
485 
486 static int af9033_get_frontend(struct dvb_frontend *fe,
487 			       struct dtv_frontend_properties *c)
488 {
489 	struct af9033_dev *dev = fe->demodulator_priv;
490 	struct i2c_client *client = dev->client;
491 	int ret;
492 	u8 buf[8];
493 
494 	dev_dbg(&client->dev, "\n");
495 
496 	/* Read all needed TPS registers */
497 	ret = regmap_bulk_read(dev->regmap, 0x80f900, buf, 8);
498 	if (ret)
499 		goto err;
500 
501 	switch ((buf[0] >> 0) & 3) {
502 	case 0:
503 		c->transmission_mode = TRANSMISSION_MODE_2K;
504 		break;
505 	case 1:
506 		c->transmission_mode = TRANSMISSION_MODE_8K;
507 		break;
508 	}
509 
510 	switch ((buf[1] >> 0) & 3) {
511 	case 0:
512 		c->guard_interval = GUARD_INTERVAL_1_32;
513 		break;
514 	case 1:
515 		c->guard_interval = GUARD_INTERVAL_1_16;
516 		break;
517 	case 2:
518 		c->guard_interval = GUARD_INTERVAL_1_8;
519 		break;
520 	case 3:
521 		c->guard_interval = GUARD_INTERVAL_1_4;
522 		break;
523 	}
524 
525 	switch ((buf[2] >> 0) & 7) {
526 	case 0:
527 		c->hierarchy = HIERARCHY_NONE;
528 		break;
529 	case 1:
530 		c->hierarchy = HIERARCHY_1;
531 		break;
532 	case 2:
533 		c->hierarchy = HIERARCHY_2;
534 		break;
535 	case 3:
536 		c->hierarchy = HIERARCHY_4;
537 		break;
538 	}
539 
540 	switch ((buf[3] >> 0) & 3) {
541 	case 0:
542 		c->modulation = QPSK;
543 		break;
544 	case 1:
545 		c->modulation = QAM_16;
546 		break;
547 	case 2:
548 		c->modulation = QAM_64;
549 		break;
550 	}
551 
552 	switch ((buf[4] >> 0) & 3) {
553 	case 0:
554 		c->bandwidth_hz = 6000000;
555 		break;
556 	case 1:
557 		c->bandwidth_hz = 7000000;
558 		break;
559 	case 2:
560 		c->bandwidth_hz = 8000000;
561 		break;
562 	}
563 
564 	switch ((buf[6] >> 0) & 7) {
565 	case 0:
566 		c->code_rate_HP = FEC_1_2;
567 		break;
568 	case 1:
569 		c->code_rate_HP = FEC_2_3;
570 		break;
571 	case 2:
572 		c->code_rate_HP = FEC_3_4;
573 		break;
574 	case 3:
575 		c->code_rate_HP = FEC_5_6;
576 		break;
577 	case 4:
578 		c->code_rate_HP = FEC_7_8;
579 		break;
580 	case 5:
581 		c->code_rate_HP = FEC_NONE;
582 		break;
583 	}
584 
585 	switch ((buf[7] >> 0) & 7) {
586 	case 0:
587 		c->code_rate_LP = FEC_1_2;
588 		break;
589 	case 1:
590 		c->code_rate_LP = FEC_2_3;
591 		break;
592 	case 2:
593 		c->code_rate_LP = FEC_3_4;
594 		break;
595 	case 3:
596 		c->code_rate_LP = FEC_5_6;
597 		break;
598 	case 4:
599 		c->code_rate_LP = FEC_7_8;
600 		break;
601 	case 5:
602 		c->code_rate_LP = FEC_NONE;
603 		break;
604 	}
605 
606 	return 0;
607 err:
608 	dev_dbg(&client->dev, "failed=%d\n", ret);
609 	return ret;
610 }
611 
612 static int af9033_read_status(struct dvb_frontend *fe, enum fe_status *status)
613 {
614 	struct af9033_dev *dev = fe->demodulator_priv;
615 	struct i2c_client *client = dev->client;
616 	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
617 	int ret, tmp = 0;
618 	u8 buf[7];
619 	unsigned int utmp, utmp1;
620 
621 	dev_dbg(&client->dev, "\n");
622 
623 	*status = 0;
624 
625 	/* Radio channel status: 0=no result, 1=has signal, 2=no signal */
626 	ret = regmap_read(dev->regmap, 0x800047, &utmp);
627 	if (ret)
628 		goto err;
629 
630 	/* Has signal */
631 	if (utmp == 0x01)
632 		*status |= FE_HAS_SIGNAL;
633 
634 	if (utmp != 0x02) {
635 		/* TPS lock */
636 		ret = regmap_read(dev->regmap, 0x80f5a9, &utmp);
637 		if (ret)
638 			goto err;
639 
640 		if ((utmp >> 0) & 0x01)
641 			*status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
642 					FE_HAS_VITERBI;
643 
644 		/* Full lock */
645 		ret = regmap_read(dev->regmap, 0x80f999, &utmp);
646 		if (ret)
647 			goto err;
648 
649 		if ((utmp >> 0) & 0x01)
650 			*status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
651 					FE_HAS_VITERBI | FE_HAS_SYNC |
652 					FE_HAS_LOCK;
653 	}
654 
655 	dev->fe_status = *status;
656 
657 	/* Signal strength */
658 	if (dev->fe_status & FE_HAS_SIGNAL) {
659 		if (dev->is_af9035) {
660 			ret = regmap_read(dev->regmap, 0x80004a, &utmp);
661 			if (ret)
662 				goto err;
663 			tmp = -utmp * 1000;
664 		} else {
665 			ret = regmap_read(dev->regmap, 0x8000f7, &utmp);
666 			if (ret)
667 				goto err;
668 			tmp = (utmp - 100) * 1000;
669 		}
670 
671 		c->strength.len = 1;
672 		c->strength.stat[0].scale = FE_SCALE_DECIBEL;
673 		c->strength.stat[0].svalue = tmp;
674 	} else {
675 		c->strength.len = 1;
676 		c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
677 	}
678 
679 	/* CNR */
680 	if (dev->fe_status & FE_HAS_VITERBI) {
681 		/* Read raw SNR value */
682 		ret = regmap_bulk_read(dev->regmap, 0x80002c, buf, 3);
683 		if (ret)
684 			goto err;
685 
686 		utmp1 = buf[2] << 16 | buf[1] << 8 | buf[0] << 0;
687 
688 		/* Read superframe number */
689 		ret = regmap_read(dev->regmap, 0x80f78b, &utmp);
690 		if (ret)
691 			goto err;
692 
693 		if (utmp)
694 			utmp1 /= utmp;
695 
696 		/* Read current transmission mode */
697 		ret = regmap_read(dev->regmap, 0x80f900, &utmp);
698 		if (ret)
699 			goto err;
700 
701 		switch ((utmp >> 0) & 3) {
702 		case 0:
703 			/* 2k */
704 			utmp1 *= 4;
705 			break;
706 		case 1:
707 			/* 8k */
708 			utmp1 *= 1;
709 			break;
710 		case 2:
711 			/* 4k */
712 			utmp1 *= 2;
713 			break;
714 		default:
715 			utmp1 *= 0;
716 			break;
717 		}
718 
719 		/* Read current modulation */
720 		ret = regmap_read(dev->regmap, 0x80f903, &utmp);
721 		if (ret)
722 			goto err;
723 
724 		switch ((utmp >> 0) & 3) {
725 		case 0:
726 			/*
727 			 * QPSK
728 			 * CNR[dB] 13 * -log10((1690000 - value) / value) + 2.6
729 			 * value [653799, 1689999], 2.6 / 13 = 3355443
730 			 */
731 			utmp1 = clamp(utmp1, 653799U, 1689999U);
732 			utmp1 = ((u64)(intlog10(utmp1)
733 				 - intlog10(1690000 - utmp1)
734 				 + 3355443) * 13 * 1000) >> 24;
735 			break;
736 		case 1:
737 			/*
738 			 * QAM-16
739 			 * CNR[dB] 6 * log10((value - 370000) / (828000 - value)) + 15.7
740 			 * value [371105, 827999], 15.7 / 6 = 43900382
741 			 */
742 			utmp1 = clamp(utmp1, 371105U, 827999U);
743 			utmp1 = ((u64)(intlog10(utmp1 - 370000)
744 				 - intlog10(828000 - utmp1)
745 				 + 43900382) * 6 * 1000) >> 24;
746 			break;
747 		case 2:
748 			/*
749 			 * QAM-64
750 			 * CNR[dB] 8 * log10((value - 193000) / (425000 - value)) + 23.8
751 			 * value [193246, 424999], 23.8 / 8 = 49912218
752 			 */
753 			utmp1 = clamp(utmp1, 193246U, 424999U);
754 			utmp1 = ((u64)(intlog10(utmp1 - 193000)
755 				 - intlog10(425000 - utmp1)
756 				 + 49912218) * 8 * 1000) >> 24;
757 			break;
758 		default:
759 			utmp1 = 0;
760 			break;
761 		}
762 
763 		dev_dbg(&client->dev, "cnr=%u\n", utmp1);
764 
765 		c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
766 		c->cnr.stat[0].svalue = utmp1;
767 	} else {
768 		c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
769 	}
770 
771 	/* UCB/PER/BER */
772 	if (dev->fe_status & FE_HAS_LOCK) {
773 		/* Outer FEC, 204 byte packets */
774 		u16 abort_packet_count, rsd_packet_count;
775 		/* Inner FEC, bits */
776 		u32 rsd_bit_err_count;
777 
778 		/*
779 		 * Packet count used for measurement is 10000
780 		 * (rsd_packet_count). Maybe it should be increased?
781 		 */
782 
783 		ret = regmap_bulk_read(dev->regmap, 0x800032, buf, 7);
784 		if (ret)
785 			goto err;
786 
787 		abort_packet_count = (buf[1] << 8) | (buf[0] << 0);
788 		rsd_bit_err_count = (buf[4] << 16) | (buf[3] << 8) | buf[2];
789 		rsd_packet_count = (buf[6] << 8) | (buf[5] << 0);
790 
791 		dev->error_block_count += abort_packet_count;
792 		dev->total_block_count += rsd_packet_count;
793 		dev->post_bit_error += rsd_bit_err_count;
794 		dev->post_bit_count += rsd_packet_count * 204 * 8;
795 
796 		c->block_count.len = 1;
797 		c->block_count.stat[0].scale = FE_SCALE_COUNTER;
798 		c->block_count.stat[0].uvalue = dev->total_block_count;
799 
800 		c->block_error.len = 1;
801 		c->block_error.stat[0].scale = FE_SCALE_COUNTER;
802 		c->block_error.stat[0].uvalue = dev->error_block_count;
803 
804 		c->post_bit_count.len = 1;
805 		c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER;
806 		c->post_bit_count.stat[0].uvalue = dev->post_bit_count;
807 
808 		c->post_bit_error.len = 1;
809 		c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER;
810 		c->post_bit_error.stat[0].uvalue = dev->post_bit_error;
811 	}
812 
813 	return 0;
814 err:
815 	dev_dbg(&client->dev, "failed=%d\n", ret);
816 	return ret;
817 }
818 
819 static int af9033_read_snr(struct dvb_frontend *fe, u16 *snr)
820 {
821 	struct af9033_dev *dev = fe->demodulator_priv;
822 	struct i2c_client *client = dev->client;
823 	struct dtv_frontend_properties *c = &dev->fe.dtv_property_cache;
824 	int ret;
825 	unsigned int utmp;
826 
827 	dev_dbg(&client->dev, "\n");
828 
829 	/* Use DVBv5 CNR */
830 	if (c->cnr.stat[0].scale == FE_SCALE_DECIBEL) {
831 		/* Return 0.1 dB for AF9030 and 0-0xffff for IT9130. */
832 		if (dev->is_af9035) {
833 			/* 1000x => 10x (0.1 dB) */
834 			*snr = div_s64(c->cnr.stat[0].svalue, 100);
835 		} else {
836 			/* 1000x => 1x (1 dB) */
837 			*snr = div_s64(c->cnr.stat[0].svalue, 1000);
838 
839 			/* Read current modulation */
840 			ret = regmap_read(dev->regmap, 0x80f903, &utmp);
841 			if (ret)
842 				goto err;
843 
844 			/* scale value to 0x0000-0xffff */
845 			switch ((utmp >> 0) & 3) {
846 			case 0:
847 				*snr = *snr * 0xffff / 23;
848 				break;
849 			case 1:
850 				*snr = *snr * 0xffff / 26;
851 				break;
852 			case 2:
853 				*snr = *snr * 0xffff / 32;
854 				break;
855 			default:
856 				ret = -EINVAL;
857 				goto err;
858 			}
859 		}
860 	} else {
861 		*snr = 0;
862 	}
863 
864 	return 0;
865 err:
866 	dev_dbg(&client->dev, "failed=%d\n", ret);
867 	return ret;
868 }
869 
870 static int af9033_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
871 {
872 	struct af9033_dev *dev = fe->demodulator_priv;
873 	struct i2c_client *client = dev->client;
874 	struct dtv_frontend_properties *c = &dev->fe.dtv_property_cache;
875 	int ret, tmp, power_real;
876 	unsigned int utmp;
877 	u8 gain_offset, buf[7];
878 
879 	dev_dbg(&client->dev, "\n");
880 
881 	if (dev->is_af9035) {
882 		/* Read signal strength of 0-100 scale */
883 		ret = regmap_read(dev->regmap, 0x800048, &utmp);
884 		if (ret)
885 			goto err;
886 
887 		/* Scale value to 0x0000-0xffff */
888 		*strength = utmp * 0xffff / 100;
889 	} else {
890 		ret = regmap_read(dev->regmap, 0x8000f7, &utmp);
891 		if (ret)
892 			goto err;
893 
894 		ret = regmap_bulk_read(dev->regmap, 0x80f900, buf, 7);
895 		if (ret)
896 			goto err;
897 
898 		if (c->frequency <= 300000000)
899 			gain_offset = 7; /* VHF */
900 		else
901 			gain_offset = 4; /* UHF */
902 
903 		power_real = (utmp - 100 - gain_offset) -
904 			power_reference[((buf[3] >> 0) & 3)][((buf[6] >> 0) & 7)];
905 
906 		if (power_real < -15)
907 			tmp = 0;
908 		else if ((power_real >= -15) && (power_real < 0))
909 			tmp = (2 * (power_real + 15)) / 3;
910 		else if ((power_real >= 0) && (power_real < 20))
911 			tmp = 4 * power_real + 10;
912 		else if ((power_real >= 20) && (power_real < 35))
913 			tmp = (2 * (power_real - 20)) / 3 + 90;
914 		else
915 			tmp = 100;
916 
917 		/* Scale value to 0x0000-0xffff */
918 		*strength = tmp * 0xffff / 100;
919 	}
920 
921 	return 0;
922 err:
923 	dev_dbg(&client->dev, "failed=%d\n", ret);
924 	return ret;
925 }
926 
927 static int af9033_read_ber(struct dvb_frontend *fe, u32 *ber)
928 {
929 	struct af9033_dev *dev = fe->demodulator_priv;
930 
931 	*ber = (dev->post_bit_error - dev->post_bit_error_prev);
932 	dev->post_bit_error_prev = dev->post_bit_error;
933 
934 	return 0;
935 }
936 
937 static int af9033_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
938 {
939 	struct af9033_dev *dev = fe->demodulator_priv;
940 
941 	*ucblocks = dev->error_block_count;
942 
943 	return 0;
944 }
945 
946 static int af9033_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
947 {
948 	struct af9033_dev *dev = fe->demodulator_priv;
949 	struct i2c_client *client = dev->client;
950 	int ret;
951 
952 	dev_dbg(&client->dev, "enable=%d\n", enable);
953 
954 	ret = regmap_update_bits(dev->regmap, 0x00fa04, 0x01, enable);
955 	if (ret)
956 		goto err;
957 
958 	return 0;
959 err:
960 	dev_dbg(&client->dev, "failed=%d\n", ret);
961 	return ret;
962 }
963 
964 static int af9033_pid_filter_ctrl(struct dvb_frontend *fe, int onoff)
965 {
966 	struct af9033_dev *dev = fe->demodulator_priv;
967 	struct i2c_client *client = dev->client;
968 	int ret;
969 
970 	dev_dbg(&client->dev, "onoff=%d\n", onoff);
971 
972 	ret = regmap_update_bits(dev->regmap, 0x80f993, 0x01, onoff);
973 	if (ret)
974 		goto err;
975 
976 	return 0;
977 err:
978 	dev_dbg(&client->dev, "failed=%d\n", ret);
979 	return ret;
980 }
981 
982 static int af9033_pid_filter(struct dvb_frontend *fe, int index, u16 pid,
983 			     int onoff)
984 {
985 	struct af9033_dev *dev = fe->demodulator_priv;
986 	struct i2c_client *client = dev->client;
987 	int ret;
988 	u8 wbuf[2] = {(pid >> 0) & 0xff, (pid >> 8) & 0xff};
989 
990 	dev_dbg(&client->dev, "index=%d pid=%04x onoff=%d\n",
991 		index, pid, onoff);
992 
993 	if (pid > 0x1fff)
994 		return 0;
995 
996 	ret = regmap_bulk_write(dev->regmap, 0x80f996, wbuf, 2);
997 	if (ret)
998 		goto err;
999 	ret = regmap_write(dev->regmap, 0x80f994, onoff);
1000 	if (ret)
1001 		goto err;
1002 	ret = regmap_write(dev->regmap, 0x80f995, index);
1003 	if (ret)
1004 		goto err;
1005 
1006 	return 0;
1007 err:
1008 	dev_dbg(&client->dev, "failed=%d\n", ret);
1009 	return ret;
1010 }
1011 
1012 static const struct dvb_frontend_ops af9033_ops = {
1013 	.delsys = {SYS_DVBT},
1014 	.info = {
1015 		.name = "Afatech AF9033 (DVB-T)",
1016 		.frequency_min_hz = 174 * MHz,
1017 		.frequency_max_hz = 862 * MHz,
1018 		.frequency_stepsize_hz = 250 * kHz,
1019 		.caps =	FE_CAN_FEC_1_2 |
1020 			FE_CAN_FEC_2_3 |
1021 			FE_CAN_FEC_3_4 |
1022 			FE_CAN_FEC_5_6 |
1023 			FE_CAN_FEC_7_8 |
1024 			FE_CAN_FEC_AUTO |
1025 			FE_CAN_QPSK |
1026 			FE_CAN_QAM_16 |
1027 			FE_CAN_QAM_64 |
1028 			FE_CAN_QAM_AUTO |
1029 			FE_CAN_TRANSMISSION_MODE_AUTO |
1030 			FE_CAN_GUARD_INTERVAL_AUTO |
1031 			FE_CAN_HIERARCHY_AUTO |
1032 			FE_CAN_RECOVER |
1033 			FE_CAN_MUTE_TS
1034 	},
1035 
1036 	.init = af9033_init,
1037 	.sleep = af9033_sleep,
1038 
1039 	.get_tune_settings = af9033_get_tune_settings,
1040 	.set_frontend = af9033_set_frontend,
1041 	.get_frontend = af9033_get_frontend,
1042 
1043 	.read_status = af9033_read_status,
1044 	.read_snr = af9033_read_snr,
1045 	.read_signal_strength = af9033_read_signal_strength,
1046 	.read_ber = af9033_read_ber,
1047 	.read_ucblocks = af9033_read_ucblocks,
1048 
1049 	.i2c_gate_ctrl = af9033_i2c_gate_ctrl,
1050 };
1051 
1052 static int af9033_probe(struct i2c_client *client)
1053 {
1054 	struct af9033_config *cfg = client->dev.platform_data;
1055 	struct af9033_dev *dev;
1056 	int ret;
1057 	u8 buf[8];
1058 	u32 reg;
1059 	static const struct regmap_config regmap_config = {
1060 		.reg_bits    =  24,
1061 		.val_bits    =  8,
1062 	};
1063 
1064 	/* Allocate memory for the internal state */
1065 	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1066 	if (!dev) {
1067 		ret = -ENOMEM;
1068 		goto err;
1069 	}
1070 
1071 	/* Setup the state */
1072 	dev->client = client;
1073 	memcpy(&dev->cfg, cfg, sizeof(dev->cfg));
1074 	switch (dev->cfg.ts_mode) {
1075 	case AF9033_TS_MODE_PARALLEL:
1076 		dev->ts_mode_parallel = true;
1077 		break;
1078 	case AF9033_TS_MODE_SERIAL:
1079 		dev->ts_mode_serial = true;
1080 		break;
1081 	case AF9033_TS_MODE_USB:
1082 		/* USB mode for AF9035 */
1083 	default:
1084 		break;
1085 	}
1086 
1087 	if (dev->cfg.clock != 12000000) {
1088 		ret = -ENODEV;
1089 		dev_err(&client->dev,
1090 			"Unsupported clock %u Hz. Only 12000000 Hz is supported currently\n",
1091 			dev->cfg.clock);
1092 		goto err_kfree;
1093 	}
1094 
1095 	/* Create regmap */
1096 	dev->regmap = regmap_init_i2c(client, &regmap_config);
1097 	if (IS_ERR(dev->regmap)) {
1098 		ret = PTR_ERR(dev->regmap);
1099 		goto err_kfree;
1100 	}
1101 
1102 	/* Firmware version */
1103 	switch (dev->cfg.tuner) {
1104 	case AF9033_TUNER_IT9135_38:
1105 	case AF9033_TUNER_IT9135_51:
1106 	case AF9033_TUNER_IT9135_52:
1107 	case AF9033_TUNER_IT9135_60:
1108 	case AF9033_TUNER_IT9135_61:
1109 	case AF9033_TUNER_IT9135_62:
1110 		dev->is_it9135 = true;
1111 		reg = 0x004bfc;
1112 		break;
1113 	default:
1114 		dev->is_af9035 = true;
1115 		reg = 0x0083e9;
1116 		break;
1117 	}
1118 
1119 	ret = regmap_bulk_read(dev->regmap, reg, &buf[0], 4);
1120 	if (ret)
1121 		goto err_regmap_exit;
1122 	ret = regmap_bulk_read(dev->regmap, 0x804191, &buf[4], 4);
1123 	if (ret)
1124 		goto err_regmap_exit;
1125 
1126 	dev_info(&client->dev,
1127 		 "firmware version: LINK %d.%d.%d.%d - OFDM %d.%d.%d.%d\n",
1128 		 buf[0], buf[1], buf[2], buf[3],
1129 		 buf[4], buf[5], buf[6], buf[7]);
1130 
1131 	/* Sleep as chip seems to be partly active by default */
1132 	/* IT9135 did not like to sleep at that early */
1133 	if (dev->is_af9035) {
1134 		ret = regmap_write(dev->regmap, 0x80004c, 0x01);
1135 		if (ret)
1136 			goto err_regmap_exit;
1137 		ret = regmap_write(dev->regmap, 0x800000, 0x00);
1138 		if (ret)
1139 			goto err_regmap_exit;
1140 	}
1141 
1142 	/* Create dvb frontend */
1143 	memcpy(&dev->fe.ops, &af9033_ops, sizeof(dev->fe.ops));
1144 	dev->fe.demodulator_priv = dev;
1145 	*cfg->fe = &dev->fe;
1146 	if (cfg->ops) {
1147 		cfg->ops->pid_filter = af9033_pid_filter;
1148 		cfg->ops->pid_filter_ctrl = af9033_pid_filter_ctrl;
1149 	}
1150 	cfg->regmap = dev->regmap;
1151 	i2c_set_clientdata(client, dev);
1152 
1153 	dev_info(&client->dev, "Afatech AF9033 successfully attached\n");
1154 
1155 	return 0;
1156 err_regmap_exit:
1157 	regmap_exit(dev->regmap);
1158 err_kfree:
1159 	kfree(dev);
1160 err:
1161 	dev_dbg(&client->dev, "failed=%d\n", ret);
1162 	return ret;
1163 }
1164 
1165 static void af9033_remove(struct i2c_client *client)
1166 {
1167 	struct af9033_dev *dev = i2c_get_clientdata(client);
1168 
1169 	dev_dbg(&client->dev, "\n");
1170 
1171 	regmap_exit(dev->regmap);
1172 	kfree(dev);
1173 }
1174 
1175 static const struct i2c_device_id af9033_id_table[] = {
1176 	{"af9033", 0},
1177 	{}
1178 };
1179 MODULE_DEVICE_TABLE(i2c, af9033_id_table);
1180 
1181 static struct i2c_driver af9033_driver = {
1182 	.driver = {
1183 		.name	= "af9033",
1184 		.suppress_bind_attrs	= true,
1185 	},
1186 	.probe		= af9033_probe,
1187 	.remove		= af9033_remove,
1188 	.id_table	= af9033_id_table,
1189 };
1190 
1191 module_i2c_driver(af9033_driver);
1192 
1193 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
1194 MODULE_DESCRIPTION("Afatech AF9033 DVB-T demodulator driver");
1195 MODULE_LICENSE("GPL");
1196