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 */
af9033_wr_reg_val_tab(struct af9033_dev * dev,const struct reg_val * tab,int tab_len)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
af9033_init(struct dvb_frontend * fe)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
af9033_sleep(struct dvb_frontend * fe)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
af9033_get_tune_settings(struct dvb_frontend * fe,struct dvb_frontend_tune_settings * fesettings)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
af9033_set_frontend(struct dvb_frontend * fe)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
af9033_get_frontend(struct dvb_frontend * fe,struct dtv_frontend_properties * c)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
af9033_read_status(struct dvb_frontend * fe,enum fe_status * status)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
af9033_read_snr(struct dvb_frontend * fe,u16 * snr)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
af9033_read_signal_strength(struct dvb_frontend * fe,u16 * strength)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
af9033_read_ber(struct dvb_frontend * fe,u32 * ber)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
af9033_read_ucblocks(struct dvb_frontend * fe,u32 * ucblocks)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
af9033_i2c_gate_ctrl(struct dvb_frontend * fe,int enable)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
af9033_pid_filter_ctrl(struct dvb_frontend * fe,int onoff)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
af9033_pid_filter(struct dvb_frontend * fe,int index,u16 pid,int onoff)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
af9033_probe(struct i2c_client * client)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, ®map_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
af9033_remove(struct i2c_client * client)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" },
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