treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157
[sfrench/cifs-2.6.git] / drivers / media / dvb-frontends / mn88472.c
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * Panasonic MN88472 DVB-T/T2/C demodulator driver
4  *
5  * Copyright (C) 2013 Antti Palosaari <crope@iki.fi>
6  */
7
8 #include "mn88472_priv.h"
9
10 static int mn88472_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 mn88472_read_status(struct dvb_frontend *fe, enum fe_status *status)
18 {
19         struct i2c_client *client = fe->demodulator_priv;
20         struct mn88472_dev *dev = i2c_get_clientdata(client);
21         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
22         int ret, i, stmp;
23         unsigned int utmp, utmp1, utmp2;
24         u8 buf[5];
25
26         if (!dev->active) {
27                 ret = -EAGAIN;
28                 goto err;
29         }
30
31         switch (c->delivery_system) {
32         case SYS_DVBT:
33                 ret = regmap_read(dev->regmap[0], 0x7f, &utmp);
34                 if (ret)
35                         goto err;
36                 if ((utmp & 0x0f) >= 0x09)
37                         *status = FE_HAS_SIGNAL | FE_HAS_CARRIER |
38                                   FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
39                 else
40                         *status = 0;
41                 break;
42         case SYS_DVBT2:
43                 ret = regmap_read(dev->regmap[2], 0x92, &utmp);
44                 if (ret)
45                         goto err;
46                 if ((utmp & 0x0f) >= 0x0d)
47                         *status = FE_HAS_SIGNAL | FE_HAS_CARRIER |
48                                   FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
49                 else if ((utmp & 0x0f) >= 0x0a)
50                         *status = FE_HAS_SIGNAL | FE_HAS_CARRIER |
51                                   FE_HAS_VITERBI;
52                 else if ((utmp & 0x0f) >= 0x07)
53                         *status = FE_HAS_SIGNAL | FE_HAS_CARRIER;
54                 else
55                         *status = 0;
56                 break;
57         case SYS_DVBC_ANNEX_A:
58                 ret = regmap_read(dev->regmap[1], 0x84, &utmp);
59                 if (ret)
60                         goto err;
61                 if ((utmp & 0x0f) >= 0x08)
62                         *status = FE_HAS_SIGNAL | FE_HAS_CARRIER |
63                                   FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
64                 else
65                         *status = 0;
66                 break;
67         default:
68                 ret = -EINVAL;
69                 goto err;
70         }
71
72         /* Signal strength */
73         if (*status & FE_HAS_SIGNAL) {
74                 for (i = 0; i < 2; i++) {
75                         ret = regmap_bulk_read(dev->regmap[2], 0x8e + i,
76                                                &buf[i], 1);
77                         if (ret)
78                                 goto err;
79                 }
80
81                 utmp1 = buf[0] << 8 | buf[1] << 0 | buf[0] >> 2;
82                 dev_dbg(&client->dev, "strength=%u\n", utmp1);
83
84                 c->strength.stat[0].scale = FE_SCALE_RELATIVE;
85                 c->strength.stat[0].uvalue = utmp1;
86         } else {
87                 c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
88         }
89
90         /* CNR */
91         if (*status & FE_HAS_VITERBI && c->delivery_system == SYS_DVBT) {
92                 /* DVB-T CNR */
93                 ret = regmap_bulk_read(dev->regmap[0], 0x9c, buf, 2);
94                 if (ret)
95                         goto err;
96
97                 utmp = buf[0] << 8 | buf[1] << 0;
98                 if (utmp) {
99                         /* CNR[dB]: 10 * log10(65536 / value) + 2 */
100                         /* log10(65536) = 80807124, 0.2 = 3355443 */
101                         stmp = ((u64)80807124 - intlog10(utmp) + 3355443)
102                                * 10000 >> 24;
103
104                         dev_dbg(&client->dev, "cnr=%d value=%u\n", stmp, utmp);
105                 } else {
106                         stmp = 0;
107                 }
108
109                 c->cnr.stat[0].svalue = stmp;
110                 c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
111         } else if (*status & FE_HAS_VITERBI &&
112                    c->delivery_system == SYS_DVBT2) {
113                 /* DVB-T2 CNR */
114                 for (i = 0; i < 3; i++) {
115                         ret = regmap_bulk_read(dev->regmap[2], 0xbc + i,
116                                                &buf[i], 1);
117                         if (ret)
118                                 goto err;
119                 }
120
121                 utmp = buf[1] << 8 | buf[2] << 0;
122                 utmp1 = (buf[0] >> 2) & 0x01; /* 0=SISO, 1=MISO */
123                 if (utmp) {
124                         if (utmp1) {
125                                 /* CNR[dB]: 10 * log10(16384 / value) - 6 */
126                                 /* log10(16384) = 70706234, 0.6 = 10066330 */
127                                 stmp = ((u64)70706234 - intlog10(utmp)
128                                        - 10066330) * 10000 >> 24;
129                                 dev_dbg(&client->dev, "cnr=%d value=%u MISO\n",
130                                         stmp, utmp);
131                         } else {
132                                 /* CNR[dB]: 10 * log10(65536 / value) + 2 */
133                                 /* log10(65536) = 80807124, 0.2 = 3355443 */
134                                 stmp = ((u64)80807124 - intlog10(utmp)
135                                        + 3355443) * 10000 >> 24;
136
137                                 dev_dbg(&client->dev, "cnr=%d value=%u SISO\n",
138                                         stmp, utmp);
139                         }
140                 } else {
141                         stmp = 0;
142                 }
143
144                 c->cnr.stat[0].svalue = stmp;
145                 c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
146         } else if (*status & FE_HAS_VITERBI &&
147                    c->delivery_system == SYS_DVBC_ANNEX_A) {
148                 /* DVB-C CNR */
149                 ret = regmap_bulk_read(dev->regmap[1], 0xa1, buf, 4);
150                 if (ret)
151                         goto err;
152
153                 utmp1 = buf[0] << 8 | buf[1] << 0; /* signal */
154                 utmp2 = buf[2] << 8 | buf[3] << 0; /* noise */
155                 if (utmp1 && utmp2) {
156                         /* CNR[dB]: 10 * log10(8 * (signal / noise)) */
157                         /* log10(8) = 15151336 */
158                         stmp = ((u64)15151336 + intlog10(utmp1)
159                                - intlog10(utmp2)) * 10000 >> 24;
160
161                         dev_dbg(&client->dev, "cnr=%d signal=%u noise=%u\n",
162                                 stmp, utmp1, utmp2);
163                 } else {
164                         stmp = 0;
165                 }
166
167                 c->cnr.stat[0].svalue = stmp;
168                 c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
169         } else {
170                 c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
171         }
172
173         /* PER */
174         if (*status & FE_HAS_SYNC) {
175                 ret = regmap_bulk_read(dev->regmap[0], 0xe1, buf, 4);
176                 if (ret)
177                         goto err;
178
179                 utmp1 = buf[0] << 8 | buf[1] << 0;
180                 utmp2 = buf[2] << 8 | buf[3] << 0;
181                 dev_dbg(&client->dev, "block_error=%u block_count=%u\n",
182                         utmp1, utmp2);
183
184                 c->block_error.stat[0].scale = FE_SCALE_COUNTER;
185                 c->block_error.stat[0].uvalue += utmp1;
186                 c->block_count.stat[0].scale = FE_SCALE_COUNTER;
187                 c->block_count.stat[0].uvalue += utmp2;
188         } else {
189                 c->block_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
190                 c->block_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
191         }
192
193         return 0;
194 err:
195         dev_dbg(&client->dev, "failed=%d\n", ret);
196         return ret;
197 }
198
199 static int mn88472_set_frontend(struct dvb_frontend *fe)
200 {
201         struct i2c_client *client = fe->demodulator_priv;
202         struct mn88472_dev *dev = i2c_get_clientdata(client);
203         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
204         int ret, i;
205         unsigned int utmp;
206         u32 if_frequency;
207         u8 buf[3], delivery_system_val, bandwidth_val, *bandwidth_vals_ptr;
208         u8 reg_bank0_b4_val, reg_bank0_cd_val, reg_bank0_d4_val;
209         u8 reg_bank0_d6_val;
210
211         dev_dbg(&client->dev,
212                 "delivery_system=%u modulation=%u frequency=%u bandwidth_hz=%u symbol_rate=%u inversion=%d stream_id=%d\n",
213                 c->delivery_system, c->modulation, c->frequency,
214                 c->bandwidth_hz, c->symbol_rate, c->inversion, c->stream_id);
215
216         if (!dev->active) {
217                 ret = -EAGAIN;
218                 goto err;
219         }
220
221         switch (c->delivery_system) {
222         case SYS_DVBT:
223                 delivery_system_val = 0x02;
224                 reg_bank0_b4_val = 0x00;
225                 reg_bank0_cd_val = 0x1f;
226                 reg_bank0_d4_val = 0x0a;
227                 reg_bank0_d6_val = 0x48;
228                 break;
229         case SYS_DVBT2:
230                 delivery_system_val = 0x03;
231                 reg_bank0_b4_val = 0xf6;
232                 reg_bank0_cd_val = 0x01;
233                 reg_bank0_d4_val = 0x09;
234                 reg_bank0_d6_val = 0x46;
235                 break;
236         case SYS_DVBC_ANNEX_A:
237                 delivery_system_val = 0x04;
238                 reg_bank0_b4_val = 0x00;
239                 reg_bank0_cd_val = 0x17;
240                 reg_bank0_d4_val = 0x09;
241                 reg_bank0_d6_val = 0x48;
242                 break;
243         default:
244                 ret = -EINVAL;
245                 goto err;
246         }
247
248         switch (c->delivery_system) {
249         case SYS_DVBT:
250         case SYS_DVBT2:
251                 switch (c->bandwidth_hz) {
252                 case 5000000:
253                         bandwidth_vals_ptr = "\xe5\x99\x9a\x1b\xa9\x1b\xa9";
254                         bandwidth_val = 0x03;
255                         break;
256                 case 6000000:
257                         bandwidth_vals_ptr = "\xbf\x55\x55\x15\x6b\x15\x6b";
258                         bandwidth_val = 0x02;
259                         break;
260                 case 7000000:
261                         bandwidth_vals_ptr = "\xa4\x00\x00\x0f\x2c\x0f\x2c";
262                         bandwidth_val = 0x01;
263                         break;
264                 case 8000000:
265                         bandwidth_vals_ptr = "\x8f\x80\x00\x08\xee\x08\xee";
266                         bandwidth_val = 0x00;
267                         break;
268                 default:
269                         ret = -EINVAL;
270                         goto err;
271                 }
272                 break;
273         case SYS_DVBC_ANNEX_A:
274                 bandwidth_vals_ptr = NULL;
275                 bandwidth_val = 0x00;
276                 break;
277         default:
278                 break;
279         }
280
281         /* Program tuner */
282         if (fe->ops.tuner_ops.set_params) {
283                 ret = fe->ops.tuner_ops.set_params(fe);
284                 if (ret)
285                         goto err;
286         }
287
288         if (fe->ops.tuner_ops.get_if_frequency) {
289                 ret = fe->ops.tuner_ops.get_if_frequency(fe, &if_frequency);
290                 if (ret)
291                         goto err;
292
293                 dev_dbg(&client->dev, "get_if_frequency=%d\n", if_frequency);
294         } else {
295                 ret = -EINVAL;
296                 goto err;
297         }
298
299         ret = regmap_write(dev->regmap[2], 0x00, 0x66);
300         if (ret)
301                 goto err;
302         ret = regmap_write(dev->regmap[2], 0x01, 0x00);
303         if (ret)
304                 goto err;
305         ret = regmap_write(dev->regmap[2], 0x02, 0x01);
306         if (ret)
307                 goto err;
308         ret = regmap_write(dev->regmap[2], 0x03, delivery_system_val);
309         if (ret)
310                 goto err;
311         ret = regmap_write(dev->regmap[2], 0x04, bandwidth_val);
312         if (ret)
313                 goto err;
314
315         /* IF */
316         utmp = DIV_ROUND_CLOSEST_ULL((u64)if_frequency * 0x1000000, dev->clk);
317         buf[0] = (utmp >> 16) & 0xff;
318         buf[1] = (utmp >>  8) & 0xff;
319         buf[2] = (utmp >>  0) & 0xff;
320         for (i = 0; i < 3; i++) {
321                 ret = regmap_write(dev->regmap[2], 0x10 + i, buf[i]);
322                 if (ret)
323                         goto err;
324         }
325
326         /* Bandwidth */
327         if (bandwidth_vals_ptr) {
328                 for (i = 0; i < 7; i++) {
329                         ret = regmap_write(dev->regmap[2], 0x13 + i,
330                                            bandwidth_vals_ptr[i]);
331                         if (ret)
332                                 goto err;
333                 }
334         }
335
336         ret = regmap_write(dev->regmap[0], 0xb4, reg_bank0_b4_val);
337         if (ret)
338                 goto err;
339         ret = regmap_write(dev->regmap[0], 0xcd, reg_bank0_cd_val);
340         if (ret)
341                 goto err;
342         ret = regmap_write(dev->regmap[0], 0xd4, reg_bank0_d4_val);
343         if (ret)
344                 goto err;
345         ret = regmap_write(dev->regmap[0], 0xd6, reg_bank0_d6_val);
346         if (ret)
347                 goto err;
348
349         switch (c->delivery_system) {
350         case SYS_DVBT:
351                 ret = regmap_write(dev->regmap[0], 0x07, 0x26);
352                 if (ret)
353                         goto err;
354                 ret = regmap_write(dev->regmap[0], 0x00, 0xba);
355                 if (ret)
356                         goto err;
357                 ret = regmap_write(dev->regmap[0], 0x01, 0x13);
358                 if (ret)
359                         goto err;
360                 break;
361         case SYS_DVBT2:
362                 ret = regmap_write(dev->regmap[2], 0x2b, 0x13);
363                 if (ret)
364                         goto err;
365                 ret = regmap_write(dev->regmap[2], 0x4f, 0x05);
366                 if (ret)
367                         goto err;
368                 ret = regmap_write(dev->regmap[1], 0xf6, 0x05);
369                 if (ret)
370                         goto err;
371                 ret = regmap_write(dev->regmap[2], 0x32,
372                                 (c->stream_id == NO_STREAM_ID_FILTER) ? 0 :
373                                 c->stream_id );
374                 if (ret)
375                         goto err;
376                 break;
377         case SYS_DVBC_ANNEX_A:
378                 break;
379         default:
380                 break;
381         }
382
383         /* Reset FSM */
384         ret = regmap_write(dev->regmap[2], 0xf8, 0x9f);
385         if (ret)
386                 goto err;
387
388         return 0;
389 err:
390         dev_dbg(&client->dev, "failed=%d\n", ret);
391         return ret;
392 }
393
394 static int mn88472_init(struct dvb_frontend *fe)
395 {
396         struct i2c_client *client = fe->demodulator_priv;
397         struct mn88472_dev *dev = i2c_get_clientdata(client);
398         int ret, len, rem;
399         unsigned int utmp;
400         const struct firmware *firmware;
401         const char *name = MN88472_FIRMWARE;
402
403         dev_dbg(&client->dev, "\n");
404
405         /* Power up */
406         ret = regmap_write(dev->regmap[2], 0x05, 0x00);
407         if (ret)
408                 goto err;
409         ret = regmap_write(dev->regmap[2], 0x0b, 0x00);
410         if (ret)
411                 goto err;
412         ret = regmap_write(dev->regmap[2], 0x0c, 0x00);
413         if (ret)
414                 goto err;
415
416         /* Check if firmware is already running */
417         ret = regmap_read(dev->regmap[0], 0xf5, &utmp);
418         if (ret)
419                 goto err;
420         if (!(utmp & 0x01))
421                 goto warm;
422
423         ret = request_firmware(&firmware, name, &client->dev);
424         if (ret) {
425                 dev_err(&client->dev, "firmware file '%s' not found\n", name);
426                 goto err;
427         }
428
429         dev_info(&client->dev, "downloading firmware from file '%s'\n", name);
430
431         ret = regmap_write(dev->regmap[0], 0xf5, 0x03);
432         if (ret)
433                 goto err_release_firmware;
434
435         for (rem = firmware->size; rem > 0; rem -= (dev->i2c_write_max - 1)) {
436                 len = min(dev->i2c_write_max - 1, rem);
437                 ret = regmap_bulk_write(dev->regmap[0], 0xf6,
438                                         &firmware->data[firmware->size - rem],
439                                         len);
440                 if (ret) {
441                         dev_err(&client->dev, "firmware download failed %d\n",
442                                 ret);
443                         goto err_release_firmware;
444                 }
445         }
446
447         /* Parity check of firmware */
448         ret = regmap_read(dev->regmap[0], 0xf8, &utmp);
449         if (ret)
450                 goto err_release_firmware;
451         if (utmp & 0x10) {
452                 ret = -EINVAL;
453                 dev_err(&client->dev, "firmware did not run\n");
454                 goto err_release_firmware;
455         }
456
457         ret = regmap_write(dev->regmap[0], 0xf5, 0x00);
458         if (ret)
459                 goto err_release_firmware;
460
461         release_firmware(firmware);
462 warm:
463         /* TS config */
464         switch (dev->ts_mode) {
465         case SERIAL_TS_MODE:
466                 utmp = 0x1d;
467                 break;
468         case PARALLEL_TS_MODE:
469                 utmp = 0x00;
470                 break;
471         default:
472                 ret = -EINVAL;
473                 goto err;
474         }
475         ret = regmap_write(dev->regmap[2], 0x08, utmp);
476         if (ret)
477                 goto err;
478
479         switch (dev->ts_clk) {
480         case VARIABLE_TS_CLOCK:
481                 utmp = 0xe3;
482                 break;
483         case FIXED_TS_CLOCK:
484                 utmp = 0xe1;
485                 break;
486         default:
487                 ret = -EINVAL;
488                 goto err;
489         }
490         ret = regmap_write(dev->regmap[0], 0xd9, utmp);
491         if (ret)
492                 goto err;
493
494         dev->active = true;
495
496         return 0;
497 err_release_firmware:
498         release_firmware(firmware);
499 err:
500         dev_dbg(&client->dev, "failed=%d\n", ret);
501         return ret;
502 }
503
504 static int mn88472_sleep(struct dvb_frontend *fe)
505 {
506         struct i2c_client *client = fe->demodulator_priv;
507         struct mn88472_dev *dev = i2c_get_clientdata(client);
508         int ret;
509
510         dev_dbg(&client->dev, "\n");
511
512         /* Power down */
513         ret = regmap_write(dev->regmap[2], 0x0c, 0x30);
514         if (ret)
515                 goto err;
516         ret = regmap_write(dev->regmap[2], 0x0b, 0x30);
517         if (ret)
518                 goto err;
519         ret = regmap_write(dev->regmap[2], 0x05, 0x3e);
520         if (ret)
521                 goto err;
522
523         return 0;
524 err:
525         dev_dbg(&client->dev, "failed=%d\n", ret);
526         return ret;
527 }
528
529 static const struct dvb_frontend_ops mn88472_ops = {
530         .delsys = {SYS_DVBT, SYS_DVBT2, SYS_DVBC_ANNEX_A},
531         .info = {
532                 .name = "Panasonic MN88472",
533                 .symbol_rate_min = 1000000,
534                 .symbol_rate_max = 7200000,
535                 .caps = FE_CAN_FEC_1_2                 |
536                         FE_CAN_FEC_2_3                 |
537                         FE_CAN_FEC_3_4                 |
538                         FE_CAN_FEC_5_6                 |
539                         FE_CAN_FEC_7_8                 |
540                         FE_CAN_FEC_AUTO                |
541                         FE_CAN_QPSK                    |
542                         FE_CAN_QAM_16                  |
543                         FE_CAN_QAM_32                  |
544                         FE_CAN_QAM_64                  |
545                         FE_CAN_QAM_128                 |
546                         FE_CAN_QAM_256                 |
547                         FE_CAN_QAM_AUTO                |
548                         FE_CAN_TRANSMISSION_MODE_AUTO  |
549                         FE_CAN_GUARD_INTERVAL_AUTO     |
550                         FE_CAN_HIERARCHY_AUTO          |
551                         FE_CAN_MUTE_TS                 |
552                         FE_CAN_2G_MODULATION           |
553                         FE_CAN_MULTISTREAM
554         },
555
556         .get_tune_settings = mn88472_get_tune_settings,
557
558         .init = mn88472_init,
559         .sleep = mn88472_sleep,
560
561         .set_frontend = mn88472_set_frontend,
562
563         .read_status = mn88472_read_status,
564 };
565
566 static struct dvb_frontend *mn88472_get_dvb_frontend(struct i2c_client *client)
567 {
568         struct mn88472_dev *dev = i2c_get_clientdata(client);
569
570         dev_dbg(&client->dev, "\n");
571
572         return &dev->fe;
573 }
574
575 static int mn88472_probe(struct i2c_client *client,
576                          const struct i2c_device_id *id)
577 {
578         struct mn88472_config *pdata = client->dev.platform_data;
579         struct mn88472_dev *dev;
580         struct dtv_frontend_properties *c;
581         int ret;
582         unsigned int utmp;
583         static const struct regmap_config regmap_config = {
584                 .reg_bits = 8,
585                 .val_bits = 8,
586         };
587
588         dev_dbg(&client->dev, "\n");
589
590         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
591         if (!dev) {
592                 ret = -ENOMEM;
593                 goto err;
594         }
595
596         dev->i2c_write_max = pdata->i2c_wr_max ? pdata->i2c_wr_max : ~0;
597         dev->clk = pdata->xtal;
598         dev->ts_mode = pdata->ts_mode;
599         dev->ts_clk = pdata->ts_clock;
600         dev->client[0] = client;
601         dev->regmap[0] = regmap_init_i2c(dev->client[0], &regmap_config);
602         if (IS_ERR(dev->regmap[0])) {
603                 ret = PTR_ERR(dev->regmap[0]);
604                 goto err_kfree;
605         }
606
607         /*
608          * Chip has three I2C addresses for different register banks. Used
609          * addresses are 0x18, 0x1a and 0x1c. We register two dummy clients,
610          * 0x1a and 0x1c, in order to get own I2C client for each register bank.
611          *
612          * Also, register bank 2 do not support sequential I/O. Only single
613          * register write or read is allowed to that bank.
614          */
615         dev->client[1] = i2c_new_dummy(client->adapter, 0x1a);
616         if (!dev->client[1]) {
617                 ret = -ENODEV;
618                 dev_err(&client->dev, "I2C registration failed\n");
619                 if (ret)
620                         goto err_regmap_0_regmap_exit;
621         }
622         dev->regmap[1] = regmap_init_i2c(dev->client[1], &regmap_config);
623         if (IS_ERR(dev->regmap[1])) {
624                 ret = PTR_ERR(dev->regmap[1]);
625                 goto err_client_1_i2c_unregister_device;
626         }
627         i2c_set_clientdata(dev->client[1], dev);
628
629         dev->client[2] = i2c_new_dummy(client->adapter, 0x1c);
630         if (!dev->client[2]) {
631                 ret = -ENODEV;
632                 dev_err(&client->dev, "2nd I2C registration failed\n");
633                 if (ret)
634                         goto err_regmap_1_regmap_exit;
635         }
636         dev->regmap[2] = regmap_init_i2c(dev->client[2], &regmap_config);
637         if (IS_ERR(dev->regmap[2])) {
638                 ret = PTR_ERR(dev->regmap[2]);
639                 goto err_client_2_i2c_unregister_device;
640         }
641         i2c_set_clientdata(dev->client[2], dev);
642
643         /* Check demod answers with correct chip id */
644         ret = regmap_read(dev->regmap[2], 0xff, &utmp);
645         if (ret)
646                 goto err_regmap_2_regmap_exit;
647
648         dev_dbg(&client->dev, "chip id=%02x\n", utmp);
649
650         if (utmp != 0x02) {
651                 ret = -ENODEV;
652                 goto err_regmap_2_regmap_exit;
653         }
654
655         /* Sleep because chip is active by default */
656         ret = regmap_write(dev->regmap[2], 0x05, 0x3e);
657         if (ret)
658                 goto err_regmap_2_regmap_exit;
659
660         /* Create dvb frontend */
661         memcpy(&dev->fe.ops, &mn88472_ops, sizeof(struct dvb_frontend_ops));
662         dev->fe.demodulator_priv = client;
663         *pdata->fe = &dev->fe;
664         i2c_set_clientdata(client, dev);
665
666         /* Init stats to indicate which stats are supported */
667         c = &dev->fe.dtv_property_cache;
668         c->strength.len = 1;
669         c->cnr.len = 1;
670         c->block_error.len = 1;
671         c->block_count.len = 1;
672
673         /* Setup callbacks */
674         pdata->get_dvb_frontend = mn88472_get_dvb_frontend;
675
676         dev_info(&client->dev, "Panasonic MN88472 successfully identified\n");
677
678         return 0;
679 err_regmap_2_regmap_exit:
680         regmap_exit(dev->regmap[2]);
681 err_client_2_i2c_unregister_device:
682         i2c_unregister_device(dev->client[2]);
683 err_regmap_1_regmap_exit:
684         regmap_exit(dev->regmap[1]);
685 err_client_1_i2c_unregister_device:
686         i2c_unregister_device(dev->client[1]);
687 err_regmap_0_regmap_exit:
688         regmap_exit(dev->regmap[0]);
689 err_kfree:
690         kfree(dev);
691 err:
692         dev_dbg(&client->dev, "failed=%d\n", ret);
693         return ret;
694 }
695
696 static int mn88472_remove(struct i2c_client *client)
697 {
698         struct mn88472_dev *dev = i2c_get_clientdata(client);
699
700         dev_dbg(&client->dev, "\n");
701
702         regmap_exit(dev->regmap[2]);
703         i2c_unregister_device(dev->client[2]);
704
705         regmap_exit(dev->regmap[1]);
706         i2c_unregister_device(dev->client[1]);
707
708         regmap_exit(dev->regmap[0]);
709
710         kfree(dev);
711
712         return 0;
713 }
714
715 static const struct i2c_device_id mn88472_id_table[] = {
716         {"mn88472", 0},
717         {}
718 };
719 MODULE_DEVICE_TABLE(i2c, mn88472_id_table);
720
721 static struct i2c_driver mn88472_driver = {
722         .driver = {
723                 .name = "mn88472",
724                 .suppress_bind_attrs = true,
725         },
726         .probe    = mn88472_probe,
727         .remove   = mn88472_remove,
728         .id_table = mn88472_id_table,
729 };
730
731 module_i2c_driver(mn88472_driver);
732
733 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
734 MODULE_DESCRIPTION("Panasonic MN88472 DVB-T/T2/C demodulator driver");
735 MODULE_LICENSE("GPL");
736 MODULE_FIRMWARE(MN88472_FIRMWARE);