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Merge tag 'io_uring-5.11-2021-01-16' of git://git.kernel.dk/linux-block
[linux/fpc-iii.git] / drivers / media / dvb-frontends / mn88473.c
blob4838969ef735c4b240eb9e3cd54b659bebcbbd88
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Panasonic MN88473 DVB-T/T2/C demodulator driver
4 *
5 * Copyright (C) 2014 Antti Palosaari <crope@iki.fi>
6 */
7
8 #include "mn88473_priv.h"
9
10 static int mn88473_get_tune_settings(struct dvb_frontend *fe,
11 struct dvb_frontend_tune_settings *s)
12 {
13 s->min_delay_ms = 1000;
14 return 0;
15 }
16
17 static int mn88473_set_frontend(struct dvb_frontend *fe)
18 {
19 struct i2c_client *client = fe->demodulator_priv;
20 struct mn88473_dev *dev = i2c_get_clientdata(client);
21 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
22 int ret, i;
23 unsigned int uitmp;
24 u32 if_frequency;
25 u8 delivery_system_val, if_val[3], *conf_val_ptr;
26 u8 reg_bank2_2d_val, reg_bank0_d2_val;
27
28 dev_dbg(&client->dev,
29 "delivery_system=%u modulation=%u frequency=%u bandwidth_hz=%u symbol_rate=%u inversion=%d stream_id=%d\n",
30 c->delivery_system, c->modulation, c->frequency,
31 c->bandwidth_hz, c->symbol_rate, c->inversion, c->stream_id);
32
33 if (!dev->active) {
34 ret = -EAGAIN;
35 goto err;
36 }
37
38 switch (c->delivery_system) {
39 case SYS_DVBT:
40 delivery_system_val = 0x02;
41 reg_bank2_2d_val = 0x23;
42 reg_bank0_d2_val = 0x2a;
43 break;
44 case SYS_DVBT2:
45 delivery_system_val = 0x03;
46 reg_bank2_2d_val = 0x3b;
47 reg_bank0_d2_val = 0x29;
48 break;
49 case SYS_DVBC_ANNEX_A:
50 delivery_system_val = 0x04;
51 reg_bank2_2d_val = 0x3b;
52 reg_bank0_d2_val = 0x29;
53 break;
54 default:
55 ret = -EINVAL;
56 goto err;
57 }
58
59 switch (c->delivery_system) {
60 case SYS_DVBT:
61 case SYS_DVBT2:
62 switch (c->bandwidth_hz) {
63 case 6000000:
64 conf_val_ptr = "\xe9\x55\x55\x1c\x29\x1c\x29";
65 break;
66 case 7000000:
67 conf_val_ptr = "\xc8\x00\x00\x17\x0a\x17\x0a";
68 break;
69 case 8000000:
70 conf_val_ptr = "\xaf\x00\x00\x11\xec\x11\xec";
71 break;
72 default:
73 ret = -EINVAL;
74 goto err;
75 }
76 break;
77 case SYS_DVBC_ANNEX_A:
78 conf_val_ptr = "\x10\xab\x0d\xae\x1d\x9d";
79 break;
80 default:
81 break;
82 }
83
84 /* Program tuner */
85 if (fe->ops.tuner_ops.set_params) {
86 ret = fe->ops.tuner_ops.set_params(fe);
87 if (ret)
88 goto err;
89 }
90
91 if (fe->ops.tuner_ops.get_if_frequency) {
92 ret = fe->ops.tuner_ops.get_if_frequency(fe, &if_frequency);
93 if (ret)
94 goto err;
95
96 dev_dbg(&client->dev, "get_if_frequency=%u\n", if_frequency);
97 } else {
98 ret = -EINVAL;
99 goto err;
100 }
101
102 /* Calculate IF registers */
103 uitmp = DIV_ROUND_CLOSEST_ULL((u64) if_frequency * 0x1000000, dev->clk);
104 if_val[0] = (uitmp >> 16) & 0xff;
105 if_val[1] = (uitmp >> 8) & 0xff;
106 if_val[2] = (uitmp >> 0) & 0xff;
107
108 ret = regmap_write(dev->regmap[2], 0x05, 0x00);
109 if (ret)
110 goto err;
111 ret = regmap_write(dev->regmap[2], 0xfb, 0x13);
112 if (ret)
113 goto err;
114 ret = regmap_write(dev->regmap[2], 0xef, 0x13);
115 if (ret)
116 goto err;
117 ret = regmap_write(dev->regmap[2], 0xf9, 0x13);
118 if (ret)
119 goto err;
120 ret = regmap_write(dev->regmap[2], 0x00, 0x18);
121 if (ret)
122 goto err;
123 ret = regmap_write(dev->regmap[2], 0x01, 0x01);
124 if (ret)
125 goto err;
126 ret = regmap_write(dev->regmap[2], 0x02, 0x21);
127 if (ret)
128 goto err;
129 ret = regmap_write(dev->regmap[2], 0x03, delivery_system_val);
130 if (ret)
131 goto err;
132 ret = regmap_write(dev->regmap[2], 0x0b, 0x00);
133 if (ret)
134 goto err;
135
136 for (i = 0; i < sizeof(if_val); i++) {
137 ret = regmap_write(dev->regmap[2], 0x10 + i, if_val[i]);
138 if (ret)
139 goto err;
140 }
141
142 switch (c->delivery_system) {
143 case SYS_DVBT:
144 case SYS_DVBT2:
145 for (i = 0; i < 7; i++) {
146 ret = regmap_write(dev->regmap[2], 0x13 + i,
147 conf_val_ptr[i]);
148 if (ret)
149 goto err;
150 }
151 break;
152 case SYS_DVBC_ANNEX_A:
153 ret = regmap_bulk_write(dev->regmap[1], 0x10, conf_val_ptr, 6);
154 if (ret)
155 goto err;
156 break;
157 default:
158 break;
159 }
160
161 ret = regmap_write(dev->regmap[2], 0x2d, reg_bank2_2d_val);
162 if (ret)
163 goto err;
164 ret = regmap_write(dev->regmap[2], 0x2e, 0x00);
165 if (ret)
166 goto err;
167 ret = regmap_write(dev->regmap[2], 0x56, 0x0d);
168 if (ret)
169 goto err;
170 ret = regmap_bulk_write(dev->regmap[0], 0x01,
171 "\xba\x13\x80\xba\x91\xdd\xe7\x28", 8);
172 if (ret)
173 goto err;
174 ret = regmap_write(dev->regmap[0], 0x0a, 0x1a);
175 if (ret)
176 goto err;
177 ret = regmap_write(dev->regmap[0], 0x13, 0x1f);
178 if (ret)
179 goto err;
180 ret = regmap_write(dev->regmap[0], 0x19, 0x03);
181 if (ret)
182 goto err;
183 ret = regmap_write(dev->regmap[0], 0x1d, 0xb0);
184 if (ret)
185 goto err;
186 ret = regmap_write(dev->regmap[0], 0x2a, 0x72);
187 if (ret)
188 goto err;
189 ret = regmap_write(dev->regmap[0], 0x2d, 0x00);
190 if (ret)
191 goto err;
192 ret = regmap_write(dev->regmap[0], 0x3c, 0x00);
193 if (ret)
194 goto err;
195 ret = regmap_write(dev->regmap[0], 0x3f, 0xf8);
196 if (ret)
197 goto err;
198 ret = regmap_bulk_write(dev->regmap[0], 0x40, "\xf4\x08", 2);
199 if (ret)
200 goto err;
201 ret = regmap_write(dev->regmap[0], 0xd2, reg_bank0_d2_val);
202 if (ret)
203 goto err;
204 ret = regmap_write(dev->regmap[0], 0xd4, 0x55);
205 if (ret)
206 goto err;
207 ret = regmap_write(dev->regmap[1], 0xbe, 0x08);
208 if (ret)
209 goto err;
210 ret = regmap_write(dev->regmap[0], 0xb2, 0x37);
211 if (ret)
212 goto err;
213 ret = regmap_write(dev->regmap[0], 0xd7, 0x04);
214 if (ret)
215 goto err;
216
217 /* PLP */
218 if (c->delivery_system == SYS_DVBT2) {
219 ret = regmap_write(dev->regmap[2], 0x36,
220 (c->stream_id == NO_STREAM_ID_FILTER) ? 0 :
221 c->stream_id );
222 if (ret)
223 goto err;
224 }
225
226 /* Reset FSM */
227 ret = regmap_write(dev->regmap[2], 0xf8, 0x9f);
228 if (ret)
229 goto err;
230
231 return 0;
232 err:
233 dev_dbg(&client->dev, "failed=%d\n", ret);
234 return ret;
235 }
236
237 static int mn88473_read_status(struct dvb_frontend *fe, enum fe_status *status)
238 {
239 struct i2c_client *client = fe->demodulator_priv;
240 struct mn88473_dev *dev = i2c_get_clientdata(client);
241 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
242 int ret, i, stmp;
243 unsigned int utmp, utmp1, utmp2;
244 u8 buf[5];
245
246 if (!dev->active) {
247 ret = -EAGAIN;
248 goto err;
249 }
250
251 /* Lock detection */
252 switch (c->delivery_system) {
253 case SYS_DVBT:
254 ret = regmap_read(dev->regmap[0], 0x62, &utmp);
255 if (ret)
256 goto err;
257
258 if (!(utmp & 0xa0)) {
259 if ((utmp & 0x0f) >= 0x09)
260 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER |
261 FE_HAS_VITERBI | FE_HAS_SYNC |
262 FE_HAS_LOCK;
263 else if ((utmp & 0x0f) >= 0x03)
264 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER;
265 } else {
266 *status = 0;
267 }
268 break;
269 case SYS_DVBT2:
270 ret = regmap_read(dev->regmap[2], 0x8b, &utmp);
271 if (ret)
272 goto err;
273
274 if (!(utmp & 0x40)) {
275 if ((utmp & 0x0f) >= 0x0d)
276 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER |
277 FE_HAS_VITERBI | FE_HAS_SYNC |
278 FE_HAS_LOCK;
279 else if ((utmp & 0x0f) >= 0x0a)
280 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER |
281 FE_HAS_VITERBI;
282 else if ((utmp & 0x0f) >= 0x07)
283 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER;
284 } else {
285 *status = 0;
286 }
287 break;
288 case SYS_DVBC_ANNEX_A:
289 ret = regmap_read(dev->regmap[1], 0x85, &utmp);
290 if (ret)
291 goto err;
292
293 if (!(utmp & 0x40)) {
294 ret = regmap_read(dev->regmap[1], 0x89, &utmp);
295 if (ret)
296 goto err;
297
298 if (utmp & 0x01)
299 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER |
300 FE_HAS_VITERBI | FE_HAS_SYNC |
301 FE_HAS_LOCK;
302 } else {
303 *status = 0;
304 }
305 break;
306 default:
307 ret = -EINVAL;
308 goto err;
309 }
310
311 /* Signal strength */
312 if (*status & FE_HAS_SIGNAL) {
313 for (i = 0; i < 2; i++) {
314 ret = regmap_bulk_read(dev->regmap[2], 0x86 + i,
315 &buf[i], 1);
316 if (ret)
317 goto err;
318 }
319
320 /* AGCRD[15:6] gives us a 10bit value ([5:0] are always 0) */
321 utmp1 = buf[0] << 8 | buf[1] << 0 | buf[0] >> 2;
322 dev_dbg(&client->dev, "strength=%u\n", utmp1);
323
324 c->strength.stat[0].scale = FE_SCALE_RELATIVE;
325 c->strength.stat[0].uvalue = utmp1;
326 } else {
327 c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
328 }
329
330 /* CNR */
331 if (*status & FE_HAS_VITERBI && c->delivery_system == SYS_DVBT) {
332 /* DVB-T CNR */
333 ret = regmap_bulk_read(dev->regmap[0], 0x8f, buf, 2);
334 if (ret)
335 goto err;
336
337 utmp = buf[0] << 8 | buf[1] << 0;
338 if (utmp) {
339 /* CNR[dB]: 10 * (log10(65536 / value) + 0.2) */
340 /* log10(65536) = 80807124, 0.2 = 3355443 */
341 stmp = div_u64(((u64)80807124 - intlog10(utmp)
342 + 3355443) * 10000, 1 << 24);
343 dev_dbg(&client->dev, "cnr=%d value=%u\n", stmp, utmp);
344 } else {
345 stmp = 0;
346 }
347
348 c->cnr.stat[0].svalue = stmp;
349 c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
350 } else if (*status & FE_HAS_VITERBI &&
351 c->delivery_system == SYS_DVBT2) {
352 /* DVB-T2 CNR */
353 for (i = 0; i < 3; i++) {
354 ret = regmap_bulk_read(dev->regmap[2], 0xb7 + i,
355 &buf[i], 1);
356 if (ret)
357 goto err;
358 }
359
360 utmp = buf[1] << 8 | buf[2] << 0;
361 utmp1 = (buf[0] >> 2) & 0x01; /* 0=SISO, 1=MISO */
362 if (utmp) {
363 if (utmp1) {
364 /* CNR[dB]: 10 * (log10(16384 / value) - 0.6) */
365 /* log10(16384) = 70706234, 0.6 = 10066330 */
366 stmp = div_u64(((u64)70706234 - intlog10(utmp)
367 - 10066330) * 10000, 1 << 24);
368 dev_dbg(&client->dev, "cnr=%d value=%u MISO\n",
369 stmp, utmp);
370 } else {
371 /* CNR[dB]: 10 * (log10(65536 / value) + 0.2) */
372 /* log10(65536) = 80807124, 0.2 = 3355443 */
373 stmp = div_u64(((u64)80807124 - intlog10(utmp)
374 + 3355443) * 10000, 1 << 24);
375 dev_dbg(&client->dev, "cnr=%d value=%u SISO\n",
376 stmp, utmp);
377 }
378 } else {
379 stmp = 0;
380 }
381
382 c->cnr.stat[0].svalue = stmp;
383 c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
384 } else if (*status & FE_HAS_VITERBI &&
385 c->delivery_system == SYS_DVBC_ANNEX_A) {
386 /* DVB-C CNR */
387 ret = regmap_bulk_read(dev->regmap[1], 0xa1, buf, 4);
388 if (ret)
389 goto err;
390
391 utmp1 = buf[0] << 8 | buf[1] << 0; /* signal */
392 utmp2 = buf[2] << 8 | buf[3] << 0; /* noise */
393 if (utmp1 && utmp2) {
394 /* CNR[dB]: 10 * log10(8 * (signal / noise)) */
395 /* log10(8) = 15151336 */
396 stmp = div_u64(((u64)15151336 + intlog10(utmp1)
397 - intlog10(utmp2)) * 10000, 1 << 24);
398 dev_dbg(&client->dev, "cnr=%d signal=%u noise=%u\n",
399 stmp, utmp1, utmp2);
400 } else {
401 stmp = 0;
402 }
403
404 c->cnr.stat[0].svalue = stmp;
405 c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
406 } else {
407 c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
408 }
409
410 /* BER */
411 if (*status & FE_HAS_LOCK && (c->delivery_system == SYS_DVBT ||
412 c->delivery_system == SYS_DVBC_ANNEX_A)) {
413 /* DVB-T & DVB-C BER */
414 ret = regmap_bulk_read(dev->regmap[0], 0x92, buf, 5);
415 if (ret)
416 goto err;
417
418 utmp1 = buf[0] << 16 | buf[1] << 8 | buf[2] << 0;
419 utmp2 = buf[3] << 8 | buf[4] << 0;
420 utmp2 = utmp2 * 8 * 204;
421 dev_dbg(&client->dev, "post_bit_error=%u post_bit_count=%u\n",
422 utmp1, utmp2);
423
424 c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER;
425 c->post_bit_error.stat[0].uvalue += utmp1;
426 c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER;
427 c->post_bit_count.stat[0].uvalue += utmp2;
428 } else {
429 c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
430 c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
431 }
432
433 /* PER */
434 if (*status & FE_HAS_LOCK) {
435 ret = regmap_bulk_read(dev->regmap[0], 0xdd, buf, 4);
436 if (ret)
437 goto err;
438
439 utmp1 = buf[0] << 8 | buf[1] << 0;
440 utmp2 = buf[2] << 8 | buf[3] << 0;
441 dev_dbg(&client->dev, "block_error=%u block_count=%u\n",
442 utmp1, utmp2);
443
444 c->block_error.stat[0].scale = FE_SCALE_COUNTER;
445 c->block_error.stat[0].uvalue += utmp1;
446 c->block_count.stat[0].scale = FE_SCALE_COUNTER;
447 c->block_count.stat[0].uvalue += utmp2;
448 } else {
449 c->block_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
450 c->block_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
451 }
452
453 return 0;
454 err:
455 dev_dbg(&client->dev, "failed=%d\n", ret);
456 return ret;
457 }
458
459 static int mn88473_init(struct dvb_frontend *fe)
460 {
461 struct i2c_client *client = fe->demodulator_priv;
462 struct mn88473_dev *dev = i2c_get_clientdata(client);
463 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
464 int ret, len, remain;
465 unsigned int uitmp;
466 const struct firmware *fw;
467 const char *name = MN88473_FIRMWARE;
468
469 dev_dbg(&client->dev, "\n");
470
471 /* Check if firmware is already running */
472 ret = regmap_read(dev->regmap[0], 0xf5, &uitmp);
473 if (ret)
474 goto err;
475
476 if (!(uitmp & 0x01))
477 goto warm;
478
479 /* Request the firmware, this will block and timeout */
480 ret = request_firmware(&fw, name, &client->dev);
481 if (ret) {
482 dev_err(&client->dev, "firmware file '%s' not found\n", name);
483 goto err;
484 }
485
486 dev_info(&client->dev, "downloading firmware from file '%s'\n", name);
487
488 ret = regmap_write(dev->regmap[0], 0xf5, 0x03);
489 if (ret)
490 goto err_release_firmware;
491
492 for (remain = fw->size; remain > 0; remain -= (dev->i2c_wr_max - 1)) {
493 len = min(dev->i2c_wr_max - 1, remain);
494 ret = regmap_bulk_write(dev->regmap[0], 0xf6,
495 &fw->data[fw->size - remain], len);
496 if (ret) {
497 dev_err(&client->dev, "firmware download failed %d\n",
498 ret);
499 goto err_release_firmware;
500 }
501 }
502
503 release_firmware(fw);
504
505 /* Parity check of firmware */
506 ret = regmap_read(dev->regmap[0], 0xf8, &uitmp);
507 if (ret)
508 goto err;
509
510 if (uitmp & 0x10) {
511 dev_err(&client->dev, "firmware parity check failed\n");
512 ret = -EINVAL;
513 goto err;
514 }
515
516 ret = regmap_write(dev->regmap[0], 0xf5, 0x00);
517 if (ret)
518 goto err;
519 warm:
520 /* TS config */
521 ret = regmap_write(dev->regmap[2], 0x09, 0x08);
522 if (ret)
523 goto err;
524 ret = regmap_write(dev->regmap[2], 0x08, 0x1d);
525 if (ret)
526 goto err;
527
528 dev->active = true;
529
530 /* init stats here to indicate which stats are supported */
531 c->strength.len = 1;
532 c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
533 c->cnr.len = 1;
534 c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
535 c->post_bit_error.len = 1;
536 c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
537 c->post_bit_count.len = 1;
538 c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
539 c->block_error.len = 1;
540 c->block_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
541 c->block_count.len = 1;
542 c->block_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
543
544 return 0;
545 err_release_firmware:
546 release_firmware(fw);
547 err:
548 dev_dbg(&client->dev, "failed=%d\n", ret);
549 return ret;
550 }
551
552 static int mn88473_sleep(struct dvb_frontend *fe)
553 {
554 struct i2c_client *client = fe->demodulator_priv;
555 struct mn88473_dev *dev = i2c_get_clientdata(client);
556 int ret;
557
558 dev_dbg(&client->dev, "\n");
559
560 dev->active = false;
561
562 ret = regmap_write(dev->regmap[2], 0x05, 0x3e);
563 if (ret)
564 goto err;
565
566 return 0;
567 err:
568 dev_dbg(&client->dev, "failed=%d\n", ret);
569 return ret;
570 }
571
572 static const struct dvb_frontend_ops mn88473_ops = {
573 .delsys = {SYS_DVBT, SYS_DVBT2, SYS_DVBC_ANNEX_A},
574 .info = {
575 .name = "Panasonic MN88473",
576 .symbol_rate_min = 1000000,
577 .symbol_rate_max = 7200000,
578 .caps = FE_CAN_FEC_1_2 |
579 FE_CAN_FEC_2_3 |
580 FE_CAN_FEC_3_4 |
581 FE_CAN_FEC_5_6 |
582 FE_CAN_FEC_7_8 |
583 FE_CAN_FEC_AUTO |
584 FE_CAN_QPSK |
585 FE_CAN_QAM_16 |
586 FE_CAN_QAM_32 |
587 FE_CAN_QAM_64 |
588 FE_CAN_QAM_128 |
589 FE_CAN_QAM_256 |
590 FE_CAN_QAM_AUTO |
591 FE_CAN_TRANSMISSION_MODE_AUTO |
592 FE_CAN_GUARD_INTERVAL_AUTO |
593 FE_CAN_HIERARCHY_AUTO |
594 FE_CAN_MUTE_TS |
595 FE_CAN_2G_MODULATION |
596 FE_CAN_MULTISTREAM
597 },
598
599 .get_tune_settings = mn88473_get_tune_settings,
600
601 .init = mn88473_init,
602 .sleep = mn88473_sleep,
603
604 .set_frontend = mn88473_set_frontend,
605
606 .read_status = mn88473_read_status,
607 };
608
609 static int mn88473_probe(struct i2c_client *client,
610 const struct i2c_device_id *id)
611 {
612 struct mn88473_config *config = client->dev.platform_data;
613 struct mn88473_dev *dev;
614 int ret;
615 unsigned int uitmp;
616 static const struct regmap_config regmap_config = {
617 .reg_bits = 8,
618 .val_bits = 8,
619 };
620
621 dev_dbg(&client->dev, "\n");
622
623 /* Caller really need to provide pointer for frontend we create */
624 if (config->fe == NULL) {
625 dev_err(&client->dev, "frontend pointer not defined\n");
626 ret = -EINVAL;
627 goto err;
628 }
629
630 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
631 if (dev == NULL) {
632 ret = -ENOMEM;
633 goto err;
634 }
635
636 if (config->i2c_wr_max)
637 dev->i2c_wr_max = config->i2c_wr_max;
638 else
639 dev->i2c_wr_max = ~0;
640
641 if (config->xtal)
642 dev->clk = config->xtal;
643 else
644 dev->clk = 25000000;
645 dev->client[0] = client;
646 dev->regmap[0] = regmap_init_i2c(dev->client[0], &regmap_config);
647 if (IS_ERR(dev->regmap[0])) {
648 ret = PTR_ERR(dev->regmap[0]);
649 goto err_kfree;
650 }
651
652 /*
653 * Chip has three I2C addresses for different register banks. Used
654 * addresses are 0x18, 0x1a and 0x1c. We register two dummy clients,
655 * 0x1a and 0x1c, in order to get own I2C client for each register bank.
656 *
657 * Also, register bank 2 do not support sequential I/O. Only single
658 * register write or read is allowed to that bank.
659 */
660 dev->client[1] = i2c_new_dummy_device(client->adapter, 0x1a);
661 if (IS_ERR(dev->client[1])) {
662 ret = PTR_ERR(dev->client[1]);
663 dev_err(&client->dev, "I2C registration failed\n");
664 goto err_regmap_0_regmap_exit;
665 }
666 dev->regmap[1] = regmap_init_i2c(dev->client[1], &regmap_config);
667 if (IS_ERR(dev->regmap[1])) {
668 ret = PTR_ERR(dev->regmap[1]);
669 goto err_client_1_i2c_unregister_device;
670 }
671 i2c_set_clientdata(dev->client[1], dev);
672
673 dev->client[2] = i2c_new_dummy_device(client->adapter, 0x1c);
674 if (IS_ERR(dev->client[2])) {
675 ret = PTR_ERR(dev->client[2]);
676 dev_err(&client->dev, "2nd I2C registration failed\n");
677 goto err_regmap_1_regmap_exit;
678 }
679 dev->regmap[2] = regmap_init_i2c(dev->client[2], &regmap_config);
680 if (IS_ERR(dev->regmap[2])) {
681 ret = PTR_ERR(dev->regmap[2]);
682 goto err_client_2_i2c_unregister_device;
683 }
684 i2c_set_clientdata(dev->client[2], dev);
685
686 /* Check demod answers with correct chip id */
687 ret = regmap_read(dev->regmap[2], 0xff, &uitmp);
688 if (ret)
689 goto err_regmap_2_regmap_exit;
690
691 dev_dbg(&client->dev, "chip id=%02x\n", uitmp);
692
693 if (uitmp != 0x03) {
694 ret = -ENODEV;
695 goto err_regmap_2_regmap_exit;
696 }
697
698 /* Sleep because chip is active by default */
699 ret = regmap_write(dev->regmap[2], 0x05, 0x3e);
700 if (ret)
701 goto err_regmap_2_regmap_exit;
702
703 /* Create dvb frontend */
704 memcpy(&dev->frontend.ops, &mn88473_ops, sizeof(dev->frontend.ops));
705 dev->frontend.demodulator_priv = client;
706 *config->fe = &dev->frontend;
707 i2c_set_clientdata(client, dev);
708
709 dev_info(&client->dev, "Panasonic MN88473 successfully identified\n");
710
711 return 0;
712 err_regmap_2_regmap_exit:
713 regmap_exit(dev->regmap[2]);
714 err_client_2_i2c_unregister_device:
715 i2c_unregister_device(dev->client[2]);
716 err_regmap_1_regmap_exit:
717 regmap_exit(dev->regmap[1]);
718 err_client_1_i2c_unregister_device:
719 i2c_unregister_device(dev->client[1]);
720 err_regmap_0_regmap_exit:
721 regmap_exit(dev->regmap[0]);
722 err_kfree:
723 kfree(dev);
724 err:
725 dev_dbg(&client->dev, "failed=%d\n", ret);
726 return ret;
727 }
728
729 static int mn88473_remove(struct i2c_client *client)
730 {
731 struct mn88473_dev *dev = i2c_get_clientdata(client);
732
733 dev_dbg(&client->dev, "\n");
734
735 regmap_exit(dev->regmap[2]);
736 i2c_unregister_device(dev->client[2]);
737
738 regmap_exit(dev->regmap[1]);
739 i2c_unregister_device(dev->client[1]);
740
741 regmap_exit(dev->regmap[0]);
742
743 kfree(dev);
744
745 return 0;
746 }
747
748 static const struct i2c_device_id mn88473_id_table[] = {
749 {"mn88473", 0},
750 {}
751 };
752 MODULE_DEVICE_TABLE(i2c, mn88473_id_table);
753
754 static struct i2c_driver mn88473_driver = {
755 .driver = {
756 .name = "mn88473",
757 .suppress_bind_attrs = true,
758 },
759 .probe = mn88473_probe,
760 .remove = mn88473_remove,
761 .id_table = mn88473_id_table,
762 };
763
764 module_i2c_driver(mn88473_driver);
765
766 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
767 MODULE_DESCRIPTION("Panasonic MN88473 DVB-T/T2/C demodulator driver");
768 MODULE_LICENSE("GPL");
769 MODULE_FIRMWARE(MN88473_FIRMWARE);
Linux with added FPC-III support