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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / media / dvb-frontends / si2168.c
blob14b93a7d335892c8b4675a1eca62ad66325b72e4
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Silicon Labs Si2168 DVB-T/T2/C demodulator driver
4 *
5 * Copyright (C) 2014 Antti Palosaari <crope@iki.fi>
6 */
7
8 #include <linux/delay.h>
9
10 #include "si2168_priv.h"
11
12 static const struct dvb_frontend_ops si2168_ops;
13
14 static void cmd_init(struct si2168_cmd *cmd, const u8 *buf, int wlen, int rlen)
15 {
16 memcpy(cmd->args, buf, wlen);
17 cmd->wlen = wlen;
18 cmd->rlen = rlen;
19 }
20
21 /* execute firmware command */
22 static int si2168_cmd_execute(struct i2c_client *client, struct si2168_cmd *cmd)
23 {
24 struct si2168_dev *dev = i2c_get_clientdata(client);
25 int ret;
26 unsigned long timeout;
27
28 mutex_lock(&dev->i2c_mutex);
29
30 if (cmd->wlen) {
31 /* write cmd and args for firmware */
32 ret = i2c_master_send(client, cmd->args, cmd->wlen);
33 if (ret < 0) {
34 goto err_mutex_unlock;
35 } else if (ret != cmd->wlen) {
36 ret = -EREMOTEIO;
37 goto err_mutex_unlock;
38 }
39 }
40
41 if (cmd->rlen) {
42 /* wait cmd execution terminate */
43 #define TIMEOUT 70
44 timeout = jiffies + msecs_to_jiffies(TIMEOUT);
45 while (!time_after(jiffies, timeout)) {
46 ret = i2c_master_recv(client, cmd->args, cmd->rlen);
47 if (ret < 0) {
48 goto err_mutex_unlock;
49 } else if (ret != cmd->rlen) {
50 ret = -EREMOTEIO;
51 goto err_mutex_unlock;
52 }
53
54 /* firmware ready? */
55 if ((cmd->args[0] >> 7) & 0x01)
56 break;
57 }
58
59 dev_dbg(&client->dev, "cmd execution took %d ms\n",
60 jiffies_to_msecs(jiffies) -
61 (jiffies_to_msecs(timeout) - TIMEOUT));
62
63 /* error bit set? */
64 if ((cmd->args[0] >> 6) & 0x01) {
65 ret = -EREMOTEIO;
66 goto err_mutex_unlock;
67 }
68
69 if (!((cmd->args[0] >> 7) & 0x01)) {
70 ret = -ETIMEDOUT;
71 goto err_mutex_unlock;
72 }
73 }
74
75 mutex_unlock(&dev->i2c_mutex);
76 return 0;
77 err_mutex_unlock:
78 mutex_unlock(&dev->i2c_mutex);
79 dev_dbg(&client->dev, "failed=%d\n", ret);
80 return ret;
81 }
82
83 static int si2168_ts_bus_ctrl(struct dvb_frontend *fe, int acquire)
84 {
85 struct i2c_client *client = fe->demodulator_priv;
86 struct si2168_dev *dev = i2c_get_clientdata(client);
87 struct si2168_cmd cmd;
88 int ret = 0;
89
90 dev_dbg(&client->dev, "%s acquire: %d\n", __func__, acquire);
91
92 /* set manual value */
93 if (dev->ts_mode & SI2168_TS_CLK_MANUAL) {
94 cmd_init(&cmd, "\x14\x00\x0d\x10\xe8\x03", 6, 4);
95 ret = si2168_cmd_execute(client, &cmd);
96 if (ret)
97 return ret;
98 }
99 /* set TS_MODE property */
100 cmd_init(&cmd, "\x14\x00\x01\x10\x10\x00", 6, 4);
101 if (dev->ts_mode & SI2168_TS_CLK_MANUAL)
102 cmd.args[4] = SI2168_TS_CLK_MANUAL;
103 if (acquire)
104 cmd.args[4] |= dev->ts_mode;
105 else
106 cmd.args[4] |= SI2168_TS_TRISTATE;
107 if (dev->ts_clock_gapped)
108 cmd.args[4] |= 0x40;
109 ret = si2168_cmd_execute(client, &cmd);
110
111 return ret;
112 }
113
114 static int si2168_read_status(struct dvb_frontend *fe, enum fe_status *status)
115 {
116 struct i2c_client *client = fe->demodulator_priv;
117 struct si2168_dev *dev = i2c_get_clientdata(client);
118 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
119 int ret, i;
120 unsigned int utmp, utmp1, utmp2;
121 struct si2168_cmd cmd;
122
123 *status = 0;
124
125 if (!dev->active) {
126 ret = -EAGAIN;
127 goto err;
128 }
129
130 switch (c->delivery_system) {
131 case SYS_DVBT:
132 cmd_init(&cmd, "\xa0\x01", 2, 13);
133 break;
134 case SYS_DVBC_ANNEX_A:
135 cmd_init(&cmd, "\x90\x01", 2, 9);
136 break;
137 case SYS_DVBT2:
138 cmd_init(&cmd, "\x50\x01", 2, 14);
139 break;
140 default:
141 ret = -EINVAL;
142 goto err;
143 }
144
145 ret = si2168_cmd_execute(client, &cmd);
146 if (ret)
147 goto err;
148
149 switch ((cmd.args[2] >> 1) & 0x03) {
150 case 0x01:
151 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER;
152 break;
153 case 0x03:
154 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_VITERBI |
155 FE_HAS_SYNC | FE_HAS_LOCK;
156 break;
157 }
158
159 dev->fe_status = *status;
160
161 if (*status & FE_HAS_LOCK) {
162 c->cnr.len = 1;
163 c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
164 c->cnr.stat[0].svalue = cmd.args[3] * 1000 / 4;
165 } else {
166 c->cnr.len = 1;
167 c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
168 }
169
170 dev_dbg(&client->dev, "status=%02x args=%*ph\n",
171 *status, cmd.rlen, cmd.args);
172
173 /* BER */
174 if (*status & FE_HAS_VITERBI) {
175 cmd_init(&cmd, "\x82\x00", 2, 3);
176 ret = si2168_cmd_execute(client, &cmd);
177 if (ret)
178 goto err;
179
180 /*
181 * Firmware returns [0, 255] mantissa and [0, 8] exponent.
182 * Convert to DVB API: mantissa * 10^(8 - exponent) / 10^8
183 */
184 utmp = clamp(8 - cmd.args[1], 0, 8);
185 for (i = 0, utmp1 = 1; i < utmp; i++)
186 utmp1 = utmp1 * 10;
187
188 utmp1 = cmd.args[2] * utmp1;
189 utmp2 = 100000000; /* 10^8 */
190
191 dev_dbg(&client->dev,
192 "post_bit_error=%u post_bit_count=%u ber=%u*10^-%u\n",
193 utmp1, utmp2, cmd.args[2], cmd.args[1]);
194
195 c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER;
196 c->post_bit_error.stat[0].uvalue += utmp1;
197 c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER;
198 c->post_bit_count.stat[0].uvalue += utmp2;
199 } else {
200 c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
201 c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
202 }
203
204 /* UCB */
205 if (*status & FE_HAS_SYNC) {
206 cmd_init(&cmd, "\x84\x01", 2, 3);
207 ret = si2168_cmd_execute(client, &cmd);
208 if (ret)
209 goto err;
210
211 utmp1 = cmd.args[2] << 8 | cmd.args[1] << 0;
212 dev_dbg(&client->dev, "block_error=%u\n", utmp1);
213
214 /* Sometimes firmware returns bogus value */
215 if (utmp1 == 0xffff)
216 utmp1 = 0;
217
218 c->block_error.stat[0].scale = FE_SCALE_COUNTER;
219 c->block_error.stat[0].uvalue += utmp1;
220 } else {
221 c->block_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
222 }
223
224 return 0;
225 err:
226 dev_dbg(&client->dev, "failed=%d\n", ret);
227 return ret;
228 }
229
230 static int si2168_set_frontend(struct dvb_frontend *fe)
231 {
232 struct i2c_client *client = fe->demodulator_priv;
233 struct si2168_dev *dev = i2c_get_clientdata(client);
234 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
235 int ret;
236 struct si2168_cmd cmd;
237 u8 bandwidth, delivery_system;
238
239 dev_dbg(&client->dev,
240 "delivery_system=%u modulation=%u frequency=%u bandwidth_hz=%u symbol_rate=%u inversion=%u stream_id=%u\n",
241 c->delivery_system, c->modulation, c->frequency,
242 c->bandwidth_hz, c->symbol_rate, c->inversion,
243 c->stream_id);
244
245 if (!dev->active) {
246 ret = -EAGAIN;
247 goto err;
248 }
249
250 switch (c->delivery_system) {
251 case SYS_DVBT:
252 delivery_system = 0x20;
253 break;
254 case SYS_DVBC_ANNEX_A:
255 delivery_system = 0x30;
256 break;
257 case SYS_DVBT2:
258 delivery_system = 0x70;
259 break;
260 default:
261 ret = -EINVAL;
262 goto err;
263 }
264
265 if (c->bandwidth_hz == 0) {
266 ret = -EINVAL;
267 goto err;
268 } else if (c->bandwidth_hz <= 2000000)
269 bandwidth = 0x02;
270 else if (c->bandwidth_hz <= 5000000)
271 bandwidth = 0x05;
272 else if (c->bandwidth_hz <= 6000000)
273 bandwidth = 0x06;
274 else if (c->bandwidth_hz <= 7000000)
275 bandwidth = 0x07;
276 else if (c->bandwidth_hz <= 8000000)
277 bandwidth = 0x08;
278 else if (c->bandwidth_hz <= 9000000)
279 bandwidth = 0x09;
280 else if (c->bandwidth_hz <= 10000000)
281 bandwidth = 0x0a;
282 else
283 bandwidth = 0x0f;
284
285 /* program tuner */
286 if (fe->ops.tuner_ops.set_params) {
287 ret = fe->ops.tuner_ops.set_params(fe);
288 if (ret)
289 goto err;
290 }
291
292 cmd_init(&cmd, "\x88\x02\x02\x02\x02", 5, 5);
293 ret = si2168_cmd_execute(client, &cmd);
294 if (ret)
295 goto err;
296
297 /* that has no big effect */
298 if (c->delivery_system == SYS_DVBT)
299 cmd_init(&cmd, "\x89\x21\x06\x11\xff\x98", 6, 3);
300 else if (c->delivery_system == SYS_DVBC_ANNEX_A)
301 cmd_init(&cmd, "\x89\x21\x06\x11\x89\xf0", 6, 3);
302 else if (c->delivery_system == SYS_DVBT2)
303 cmd_init(&cmd, "\x89\x21\x06\x11\x89\x20", 6, 3);
304 ret = si2168_cmd_execute(client, &cmd);
305 if (ret)
306 goto err;
307
308 if (c->delivery_system == SYS_DVBT2) {
309 /* select PLP */
310 cmd.args[0] = 0x52;
311 cmd.args[1] = c->stream_id & 0xff;
312 cmd.args[2] = c->stream_id == NO_STREAM_ID_FILTER ? 0 : 1;
313 cmd.wlen = 3;
314 cmd.rlen = 1;
315 ret = si2168_cmd_execute(client, &cmd);
316 if (ret)
317 goto err;
318 }
319
320 cmd_init(&cmd, "\x51\x03", 2, 12);
321 ret = si2168_cmd_execute(client, &cmd);
322 if (ret)
323 goto err;
324
325 cmd_init(&cmd, "\x12\x08\x04", 3, 3);
326 ret = si2168_cmd_execute(client, &cmd);
327 if (ret)
328 goto err;
329
330 cmd_init(&cmd, "\x14\x00\x0c\x10\x12\x00", 6, 4);
331 ret = si2168_cmd_execute(client, &cmd);
332 if (ret)
333 goto err;
334
335 cmd_init(&cmd, "\x14\x00\x06\x10\x24\x00", 6, 4);
336 ret = si2168_cmd_execute(client, &cmd);
337 if (ret)
338 goto err;
339
340 cmd_init(&cmd, "\x14\x00\x07\x10\x00\x24", 6, 4);
341 ret = si2168_cmd_execute(client, &cmd);
342 if (ret)
343 goto err;
344
345 cmd_init(&cmd, "\x14\x00\x0a\x10\x00\x00", 6, 4);
346 cmd.args[4] = delivery_system | bandwidth;
347 if (dev->spectral_inversion)
348 cmd.args[5] |= 1;
349 ret = si2168_cmd_execute(client, &cmd);
350 if (ret)
351 goto err;
352
353 /* set DVB-C symbol rate */
354 if (c->delivery_system == SYS_DVBC_ANNEX_A) {
355 cmd_init(&cmd, "\x14\x00\x02\x11\x00\x00", 6, 4);
356 cmd.args[4] = ((c->symbol_rate / 1000) >> 0) & 0xff;
357 cmd.args[5] = ((c->symbol_rate / 1000) >> 8) & 0xff;
358 ret = si2168_cmd_execute(client, &cmd);
359 if (ret)
360 goto err;
361 }
362
363 cmd_init(&cmd, "\x14\x00\x0f\x10\x10\x00", 6, 4);
364 ret = si2168_cmd_execute(client, &cmd);
365 if (ret)
366 goto err;
367
368 cmd_init(&cmd, "\x14\x00\x09\x10\xe3\x08", 6, 4);
369 cmd.args[5] |= dev->ts_clock_inv ? 0x00 : 0x10;
370 ret = si2168_cmd_execute(client, &cmd);
371 if (ret)
372 goto err;
373
374 cmd_init(&cmd, "\x14\x00\x08\x10\xd7\x05", 6, 4);
375 cmd.args[5] |= dev->ts_clock_inv ? 0x00 : 0x10;
376 ret = si2168_cmd_execute(client, &cmd);
377 if (ret)
378 goto err;
379
380 cmd_init(&cmd, "\x14\x00\x01\x12\x00\x00", 6, 4);
381 ret = si2168_cmd_execute(client, &cmd);
382 if (ret)
383 goto err;
384
385 cmd_init(&cmd, "\x14\x00\x01\x03\x0c\x00", 6, 4);
386 ret = si2168_cmd_execute(client, &cmd);
387 if (ret)
388 goto err;
389
390 cmd_init(&cmd, "\x85", 1, 1);
391 ret = si2168_cmd_execute(client, &cmd);
392 if (ret)
393 goto err;
394
395 dev->delivery_system = c->delivery_system;
396
397 /* enable ts bus */
398 ret = si2168_ts_bus_ctrl(fe, 1);
399 if (ret)
400 goto err;
401
402 return 0;
403 err:
404 dev_dbg(&client->dev, "failed=%d\n", ret);
405 return ret;
406 }
407
408 static int si2168_init(struct dvb_frontend *fe)
409 {
410 struct i2c_client *client = fe->demodulator_priv;
411 struct si2168_dev *dev = i2c_get_clientdata(client);
412 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
413 int ret, len, remaining;
414 const struct firmware *fw;
415 struct si2168_cmd cmd;
416
417 dev_dbg(&client->dev, "\n");
418
419 /* initialize */
420 cmd_init(&cmd, "\xc0\x12\x00\x0c\x00\x0d\x16\x00\x00\x00\x00\x00\x00",
421 13, 0);
422 ret = si2168_cmd_execute(client, &cmd);
423 if (ret)
424 goto err;
425
426 if (dev->warm) {
427 /* resume */
428 cmd_init(&cmd, "\xc0\x06\x08\x0f\x00\x20\x21\x01", 8, 1);
429 ret = si2168_cmd_execute(client, &cmd);
430 if (ret)
431 goto err;
432
433 udelay(100);
434 cmd_init(&cmd, "\x85", 1, 1);
435 ret = si2168_cmd_execute(client, &cmd);
436 if (ret)
437 goto err;
438
439 goto warm;
440 }
441
442 /* power up */
443 cmd_init(&cmd, "\xc0\x06\x01\x0f\x00\x20\x20\x01", 8, 1);
444 ret = si2168_cmd_execute(client, &cmd);
445 if (ret)
446 goto err;
447
448 /* request the firmware, this will block and timeout */
449 ret = request_firmware(&fw, dev->firmware_name, &client->dev);
450 if (ret) {
451 /* fallback mechanism to handle old name for Si2168 B40 fw */
452 if (dev->chip_id == SI2168_CHIP_ID_B40) {
453 dev->firmware_name = SI2168_B40_FIRMWARE_FALLBACK;
454 ret = request_firmware(&fw, dev->firmware_name,
455 &client->dev);
456 }
457
458 if (ret == 0) {
459 dev_notice(&client->dev,
460 "please install firmware file '%s'\n",
461 SI2168_B40_FIRMWARE);
462 } else {
463 dev_err(&client->dev,
464 "firmware file '%s' not found\n",
465 dev->firmware_name);
466 goto err_release_firmware;
467 }
468 }
469
470 dev_info(&client->dev, "downloading firmware from file '%s'\n",
471 dev->firmware_name);
472
473 if ((fw->size % 17 == 0) && (fw->data[0] > 5)) {
474 /* firmware is in the new format */
475 for (remaining = fw->size; remaining > 0; remaining -= 17) {
476 len = fw->data[fw->size - remaining];
477 if (len > SI2168_ARGLEN) {
478 ret = -EINVAL;
479 break;
480 }
481 cmd_init(&cmd, &fw->data[(fw->size - remaining) + 1],
482 len, 1);
483 ret = si2168_cmd_execute(client, &cmd);
484 if (ret)
485 break;
486 }
487 } else if (fw->size % 8 == 0) {
488 /* firmware is in the old format */
489 for (remaining = fw->size; remaining > 0; remaining -= 8) {
490 cmd_init(&cmd, &fw->data[fw->size - remaining], 8, 1);
491 ret = si2168_cmd_execute(client, &cmd);
492 if (ret)
493 break;
494 }
495 } else {
496 /* bad or unknown firmware format */
497 ret = -EINVAL;
498 }
499
500 if (ret) {
501 dev_err(&client->dev, "firmware download failed %d\n", ret);
502 goto err_release_firmware;
503 }
504
505 release_firmware(fw);
506
507 cmd_init(&cmd, "\x01\x01", 2, 1);
508 ret = si2168_cmd_execute(client, &cmd);
509 if (ret)
510 goto err;
511
512 /* query firmware version */
513 cmd_init(&cmd, "\x11", 1, 10);
514 ret = si2168_cmd_execute(client, &cmd);
515 if (ret)
516 goto err;
517
518 dev->version = (cmd.args[9] + '@') << 24 | (cmd.args[6] - '0') << 16 |
519 (cmd.args[7] - '0') << 8 | (cmd.args[8]) << 0;
520 dev_info(&client->dev, "firmware version: %c %d.%d.%d\n",
521 dev->version >> 24 & 0xff, dev->version >> 16 & 0xff,
522 dev->version >> 8 & 0xff, dev->version >> 0 & 0xff);
523
524 /* set ts mode */
525 ret = si2168_ts_bus_ctrl(fe, 1);
526 if (ret)
527 goto err;
528
529 dev->warm = true;
530 warm:
531 /* Init stats here to indicate which stats are supported */
532 c->cnr.len = 1;
533 c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
534 c->post_bit_error.len = 1;
535 c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
536 c->post_bit_count.len = 1;
537 c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
538 c->block_error.len = 1;
539 c->block_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
540
541 dev->active = true;
542
543 return 0;
544 err_release_firmware:
545 release_firmware(fw);
546 err:
547 dev_dbg(&client->dev, "failed=%d\n", ret);
548 return ret;
549 }
550
551 static int si2168_sleep(struct dvb_frontend *fe)
552 {
553 struct i2c_client *client = fe->demodulator_priv;
554 struct si2168_dev *dev = i2c_get_clientdata(client);
555 int ret;
556 struct si2168_cmd cmd;
557
558 dev_dbg(&client->dev, "\n");
559
560 dev->active = false;
561
562 /* tri-state data bus */
563 ret = si2168_ts_bus_ctrl(fe, 0);
564 if (ret)
565 goto err;
566
567 /* Firmware later than B 4.0-11 loses warm state during sleep */
568 if (dev->version > ('B' << 24 | 4 << 16 | 0 << 8 | 11 << 0))
569 dev->warm = false;
570
571 cmd_init(&cmd, "\x13", 1, 0);
572 ret = si2168_cmd_execute(client, &cmd);
573 if (ret)
574 goto err;
575
576 return 0;
577 err:
578 dev_dbg(&client->dev, "failed=%d\n", ret);
579 return ret;
580 }
581
582 static int si2168_get_tune_settings(struct dvb_frontend *fe,
583 struct dvb_frontend_tune_settings *s)
584 {
585 s->min_delay_ms = 900;
586
587 return 0;
588 }
589
590 static int si2168_select(struct i2c_mux_core *muxc, u32 chan)
591 {
592 struct i2c_client *client = i2c_mux_priv(muxc);
593 int ret;
594 struct si2168_cmd cmd;
595
596 /* open I2C gate */
597 cmd_init(&cmd, "\xc0\x0d\x01", 3, 0);
598 ret = si2168_cmd_execute(client, &cmd);
599 if (ret)
600 goto err;
601
602 return 0;
603 err:
604 dev_dbg(&client->dev, "failed=%d\n", ret);
605 return ret;
606 }
607
608 static int si2168_deselect(struct i2c_mux_core *muxc, u32 chan)
609 {
610 struct i2c_client *client = i2c_mux_priv(muxc);
611 int ret;
612 struct si2168_cmd cmd;
613
614 /* close I2C gate */
615 cmd_init(&cmd, "\xc0\x0d\x00", 3, 0);
616 ret = si2168_cmd_execute(client, &cmd);
617 if (ret)
618 goto err;
619
620 return 0;
621 err:
622 dev_dbg(&client->dev, "failed=%d\n", ret);
623 return ret;
624 }
625
626 static const struct dvb_frontend_ops si2168_ops = {
627 .delsys = {SYS_DVBT, SYS_DVBT2, SYS_DVBC_ANNEX_A},
628 .info = {
629 .name = "Silicon Labs Si2168",
630 .frequency_min_hz = 48 * MHz,
631 .frequency_max_hz = 870 * MHz,
632 .frequency_stepsize_hz = 62500,
633 .symbol_rate_min = 1000000,
634 .symbol_rate_max = 7200000,
635 .caps = FE_CAN_FEC_1_2 |
636 FE_CAN_FEC_2_3 |
637 FE_CAN_FEC_3_4 |
638 FE_CAN_FEC_5_6 |
639 FE_CAN_FEC_7_8 |
640 FE_CAN_FEC_AUTO |
641 FE_CAN_QPSK |
642 FE_CAN_QAM_16 |
643 FE_CAN_QAM_32 |
644 FE_CAN_QAM_64 |
645 FE_CAN_QAM_128 |
646 FE_CAN_QAM_256 |
647 FE_CAN_QAM_AUTO |
648 FE_CAN_TRANSMISSION_MODE_AUTO |
649 FE_CAN_GUARD_INTERVAL_AUTO |
650 FE_CAN_HIERARCHY_AUTO |
651 FE_CAN_MUTE_TS |
652 FE_CAN_2G_MODULATION |
653 FE_CAN_MULTISTREAM
654 },
655
656 .get_tune_settings = si2168_get_tune_settings,
657
658 .init = si2168_init,
659 .sleep = si2168_sleep,
660
661 .set_frontend = si2168_set_frontend,
662
663 .read_status = si2168_read_status,
664 };
665
666 static int si2168_probe(struct i2c_client *client,
667 const struct i2c_device_id *id)
668 {
669 struct si2168_config *config = client->dev.platform_data;
670 struct si2168_dev *dev;
671 int ret;
672 struct si2168_cmd cmd;
673
674 dev_dbg(&client->dev, "\n");
675
676 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
677 if (!dev) {
678 ret = -ENOMEM;
679 goto err;
680 }
681
682 i2c_set_clientdata(client, dev);
683 mutex_init(&dev->i2c_mutex);
684
685 /* Initialize */
686 cmd_init(&cmd, "\xc0\x12\x00\x0c\x00\x0d\x16\x00\x00\x00\x00\x00\x00",
687 13, 0);
688 ret = si2168_cmd_execute(client, &cmd);
689 if (ret)
690 goto err_kfree;
691
692 /* Power up */
693 cmd_init(&cmd, "\xc0\x06\x01\x0f\x00\x20\x20\x01", 8, 1);
694 ret = si2168_cmd_execute(client, &cmd);
695 if (ret)
696 goto err_kfree;
697
698 /* Query chip revision */
699 cmd_init(&cmd, "\x02", 1, 13);
700 ret = si2168_cmd_execute(client, &cmd);
701 if (ret)
702 goto err_kfree;
703
704 dev->chip_id = cmd.args[1] << 24 | cmd.args[2] << 16 |
705 cmd.args[3] << 8 | cmd.args[4] << 0;
706
707 switch (dev->chip_id) {
708 case SI2168_CHIP_ID_A20:
709 dev->firmware_name = SI2168_A20_FIRMWARE;
710 break;
711 case SI2168_CHIP_ID_A30:
712 dev->firmware_name = SI2168_A30_FIRMWARE;
713 break;
714 case SI2168_CHIP_ID_B40:
715 dev->firmware_name = SI2168_B40_FIRMWARE;
716 break;
717 case SI2168_CHIP_ID_D60:
718 dev->firmware_name = SI2168_D60_FIRMWARE;
719 break;
720 default:
721 dev_dbg(&client->dev, "unknown chip version Si21%d-%c%c%c\n",
722 cmd.args[2], cmd.args[1], cmd.args[3], cmd.args[4]);
723 ret = -ENODEV;
724 goto err_kfree;
725 }
726
727 dev->version = (cmd.args[1]) << 24 | (cmd.args[3] - '0') << 16 |
728 (cmd.args[4] - '0') << 8 | (cmd.args[5]) << 0;
729
730 /* create mux i2c adapter for tuner */
731 dev->muxc = i2c_mux_alloc(client->adapter, &client->dev,
732 1, 0, I2C_MUX_LOCKED,
733 si2168_select, si2168_deselect);
734 if (!dev->muxc) {
735 ret = -ENOMEM;
736 goto err_kfree;
737 }
738 dev->muxc->priv = client;
739 ret = i2c_mux_add_adapter(dev->muxc, 0, 0, 0);
740 if (ret)
741 goto err_kfree;
742
743 /* create dvb_frontend */
744 memcpy(&dev->fe.ops, &si2168_ops, sizeof(struct dvb_frontend_ops));
745 dev->fe.demodulator_priv = client;
746 *config->i2c_adapter = dev->muxc->adapter[0];
747 *config->fe = &dev->fe;
748 dev->ts_mode = config->ts_mode;
749 dev->ts_clock_inv = config->ts_clock_inv;
750 dev->ts_clock_gapped = config->ts_clock_gapped;
751 dev->spectral_inversion = config->spectral_inversion;
752
753 dev_info(&client->dev, "Silicon Labs Si2168-%c%d%d successfully identified\n",
754 dev->version >> 24 & 0xff, dev->version >> 16 & 0xff,
755 dev->version >> 8 & 0xff);
756 dev_info(&client->dev, "firmware version: %c %d.%d.%d\n",
757 dev->version >> 24 & 0xff, dev->version >> 16 & 0xff,
758 dev->version >> 8 & 0xff, dev->version >> 0 & 0xff);
759
760 return 0;
761 err_kfree:
762 kfree(dev);
763 err:
764 dev_warn(&client->dev, "probe failed = %d\n", ret);
765 return ret;
766 }
767
768 static int si2168_remove(struct i2c_client *client)
769 {
770 struct si2168_dev *dev = i2c_get_clientdata(client);
771
772 dev_dbg(&client->dev, "\n");
773
774 i2c_mux_del_adapters(dev->muxc);
775
776 dev->fe.ops.release = NULL;
777 dev->fe.demodulator_priv = NULL;
778
779 kfree(dev);
780
781 return 0;
782 }
783
784 static const struct i2c_device_id si2168_id_table[] = {
785 {"si2168", 0},
786 {}
787 };
788 MODULE_DEVICE_TABLE(i2c, si2168_id_table);
789
790 static struct i2c_driver si2168_driver = {
791 .driver = {
792 .name = "si2168",
793 .suppress_bind_attrs = true,
794 },
795 .probe = si2168_probe,
796 .remove = si2168_remove,
797 .id_table = si2168_id_table,
798 };
799
800 module_i2c_driver(si2168_driver);
801
802 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
803 MODULE_DESCRIPTION("Silicon Labs Si2168 DVB-T/T2/C demodulator driver");
804 MODULE_LICENSE("GPL");
805 MODULE_FIRMWARE(SI2168_A20_FIRMWARE);
806 MODULE_FIRMWARE(SI2168_A30_FIRMWARE);
807 MODULE_FIRMWARE(SI2168_B40_FIRMWARE);
808 MODULE_FIRMWARE(SI2168_D60_FIRMWARE);
Linux with added FPC-III support