1 /*
2 * Silicon Labs Si2168 DVB-T/T2/C demodulator driver
3 *
4 * Copyright (C) 2014 Antti Palosaari <crope@iki.fi>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 */
16
17 #include <linux/delay.h>
18
19 #include "si2168_priv.h"
20
21 static const struct dvb_frontend_ops si2168_ops;
22
23 /* Own I2C adapter locking is needed because of I2C gate logic. */
si2168_i2c_master_send_unlocked(const struct i2c_client * client,const char * buf,int count)24 static int si2168_i2c_master_send_unlocked(const struct i2c_client *client,
25 const char *buf, int count)
26 {
27 int ret;
28 struct i2c_msg msg = {
29 .addr = client->addr,
30 .flags = 0,
31 .len = count,
32 .buf = (char *)buf,
33 };
34
35 ret = __i2c_transfer(client->adapter, &msg, 1);
36 return (ret == 1) ? count : ret;
37 }
38
si2168_i2c_master_recv_unlocked(const struct i2c_client * client,char * buf,int count)39 static int si2168_i2c_master_recv_unlocked(const struct i2c_client *client,
40 char *buf, int count)
41 {
42 int ret;
43 struct i2c_msg msg = {
44 .addr = client->addr,
45 .flags = I2C_M_RD,
46 .len = count,
47 .buf = buf,
48 };
49
50 ret = __i2c_transfer(client->adapter, &msg, 1);
51 return (ret == 1) ? count : ret;
52 }
53
54 /* execute firmware command */
si2168_cmd_execute_unlocked(struct i2c_client * client,struct si2168_cmd * cmd)55 static int si2168_cmd_execute_unlocked(struct i2c_client *client,
56 struct si2168_cmd *cmd)
57 {
58 int ret;
59 unsigned long timeout;
60
61 if (cmd->wlen) {
62 /* write cmd and args for firmware */
63 ret = si2168_i2c_master_send_unlocked(client, cmd->args,
64 cmd->wlen);
65 if (ret < 0) {
66 goto err;
67 } else if (ret != cmd->wlen) {
68 ret = -EREMOTEIO;
69 goto err;
70 }
71 }
72
73 if (cmd->rlen) {
74 /* wait cmd execution terminate */
75 #define TIMEOUT 70
76 timeout = jiffies + msecs_to_jiffies(TIMEOUT);
77 while (!time_after(jiffies, timeout)) {
78 ret = si2168_i2c_master_recv_unlocked(client, cmd->args,
79 cmd->rlen);
80 if (ret < 0) {
81 goto err;
82 } else if (ret != cmd->rlen) {
83 ret = -EREMOTEIO;
84 goto err;
85 }
86
87 /* firmware ready? */
88 if ((cmd->args[0] >> 7) & 0x01)
89 break;
90 }
91
92 dev_dbg(&client->dev, "cmd execution took %d ms\n",
93 jiffies_to_msecs(jiffies) -
94 (jiffies_to_msecs(timeout) - TIMEOUT));
95
96 /* error bit set? */
97 if ((cmd->args[0] >> 6) & 0x01) {
98 ret = -EREMOTEIO;
99 goto err;
100 }
101
102 if (!((cmd->args[0] >> 7) & 0x01)) {
103 ret = -ETIMEDOUT;
104 goto err;
105 }
106 }
107
108 return 0;
109 err:
110 dev_dbg(&client->dev, "failed=%d\n", ret);
111 return ret;
112 }
113
si2168_cmd_execute(struct i2c_client * client,struct si2168_cmd * cmd)114 static int si2168_cmd_execute(struct i2c_client *client, struct si2168_cmd *cmd)
115 {
116 int ret;
117
118 i2c_lock_adapter(client->adapter);
119 ret = si2168_cmd_execute_unlocked(client, cmd);
120 i2c_unlock_adapter(client->adapter);
121
122 return ret;
123 }
124
si2168_read_status(struct dvb_frontend * fe,enum fe_status * status)125 static int si2168_read_status(struct dvb_frontend *fe, enum fe_status *status)
126 {
127 struct i2c_client *client = fe->demodulator_priv;
128 struct si2168_dev *dev = i2c_get_clientdata(client);
129 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
130 int ret;
131 struct si2168_cmd cmd;
132
133 *status = 0;
134
135 if (!dev->active) {
136 ret = -EAGAIN;
137 goto err;
138 }
139
140 switch (c->delivery_system) {
141 case SYS_DVBT:
142 memcpy(cmd.args, "\xa0\x01", 2);
143 cmd.wlen = 2;
144 cmd.rlen = 13;
145 break;
146 case SYS_DVBC_ANNEX_A:
147 memcpy(cmd.args, "\x90\x01", 2);
148 cmd.wlen = 2;
149 cmd.rlen = 9;
150 break;
151 case SYS_DVBT2:
152 memcpy(cmd.args, "\x50\x01", 2);
153 cmd.wlen = 2;
154 cmd.rlen = 14;
155 break;
156 default:
157 ret = -EINVAL;
158 goto err;
159 }
160
161 ret = si2168_cmd_execute(client, &cmd);
162 if (ret)
163 goto err;
164
165 switch ((cmd.args[2] >> 1) & 0x03) {
166 case 0x01:
167 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER;
168 break;
169 case 0x03:
170 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_VITERBI |
171 FE_HAS_SYNC | FE_HAS_LOCK;
172 break;
173 }
174
175 dev->fe_status = *status;
176
177 if (*status & FE_HAS_LOCK) {
178 c->cnr.len = 1;
179 c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
180 c->cnr.stat[0].svalue = cmd.args[3] * 1000 / 4;
181 } else {
182 c->cnr.len = 1;
183 c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
184 }
185
186 dev_dbg(&client->dev, "status=%02x args=%*ph\n",
187 *status, cmd.rlen, cmd.args);
188
189 return 0;
190 err:
191 dev_dbg(&client->dev, "failed=%d\n", ret);
192 return ret;
193 }
194
si2168_set_frontend(struct dvb_frontend * fe)195 static int si2168_set_frontend(struct dvb_frontend *fe)
196 {
197 struct i2c_client *client = fe->demodulator_priv;
198 struct si2168_dev *dev = i2c_get_clientdata(client);
199 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
200 int ret;
201 struct si2168_cmd cmd;
202 u8 bandwidth, delivery_system;
203
204 dev_dbg(&client->dev,
205 "delivery_system=%u modulation=%u frequency=%u bandwidth_hz=%u symbol_rate=%u inversion=%u stream_id=%u\n",
206 c->delivery_system, c->modulation, c->frequency,
207 c->bandwidth_hz, c->symbol_rate, c->inversion,
208 c->stream_id);
209
210 if (!dev->active) {
211 ret = -EAGAIN;
212 goto err;
213 }
214
215 switch (c->delivery_system) {
216 case SYS_DVBT:
217 delivery_system = 0x20;
218 break;
219 case SYS_DVBC_ANNEX_A:
220 delivery_system = 0x30;
221 break;
222 case SYS_DVBT2:
223 delivery_system = 0x70;
224 break;
225 default:
226 ret = -EINVAL;
227 goto err;
228 }
229
230 if (c->bandwidth_hz == 0) {
231 ret = -EINVAL;
232 goto err;
233 } else if (c->bandwidth_hz <= 2000000)
234 bandwidth = 0x02;
235 else if (c->bandwidth_hz <= 5000000)
236 bandwidth = 0x05;
237 else if (c->bandwidth_hz <= 6000000)
238 bandwidth = 0x06;
239 else if (c->bandwidth_hz <= 7000000)
240 bandwidth = 0x07;
241 else if (c->bandwidth_hz <= 8000000)
242 bandwidth = 0x08;
243 else if (c->bandwidth_hz <= 9000000)
244 bandwidth = 0x09;
245 else if (c->bandwidth_hz <= 10000000)
246 bandwidth = 0x0a;
247 else
248 bandwidth = 0x0f;
249
250 /* program tuner */
251 if (fe->ops.tuner_ops.set_params) {
252 ret = fe->ops.tuner_ops.set_params(fe);
253 if (ret)
254 goto err;
255 }
256
257 memcpy(cmd.args, "\x88\x02\x02\x02\x02", 5);
258 cmd.wlen = 5;
259 cmd.rlen = 5;
260 ret = si2168_cmd_execute(client, &cmd);
261 if (ret)
262 goto err;
263
264 /* that has no big effect */
265 if (c->delivery_system == SYS_DVBT)
266 memcpy(cmd.args, "\x89\x21\x06\x11\xff\x98", 6);
267 else if (c->delivery_system == SYS_DVBC_ANNEX_A)
268 memcpy(cmd.args, "\x89\x21\x06\x11\x89\xf0", 6);
269 else if (c->delivery_system == SYS_DVBT2)
270 memcpy(cmd.args, "\x89\x21\x06\x11\x89\x20", 6);
271 cmd.wlen = 6;
272 cmd.rlen = 3;
273 ret = si2168_cmd_execute(client, &cmd);
274 if (ret)
275 goto err;
276
277 if (c->delivery_system == SYS_DVBT2) {
278 /* select PLP */
279 cmd.args[0] = 0x52;
280 cmd.args[1] = c->stream_id & 0xff;
281 cmd.args[2] = c->stream_id == NO_STREAM_ID_FILTER ? 0 : 1;
282 cmd.wlen = 3;
283 cmd.rlen = 1;
284 ret = si2168_cmd_execute(client, &cmd);
285 if (ret)
286 goto err;
287 }
288
289 memcpy(cmd.args, "\x51\x03", 2);
290 cmd.wlen = 2;
291 cmd.rlen = 12;
292 ret = si2168_cmd_execute(client, &cmd);
293 if (ret)
294 goto err;
295
296 memcpy(cmd.args, "\x12\x08\x04", 3);
297 cmd.wlen = 3;
298 cmd.rlen = 3;
299 ret = si2168_cmd_execute(client, &cmd);
300 if (ret)
301 goto err;
302
303 memcpy(cmd.args, "\x14\x00\x0c\x10\x12\x00", 6);
304 cmd.wlen = 6;
305 cmd.rlen = 4;
306 ret = si2168_cmd_execute(client, &cmd);
307 if (ret)
308 goto err;
309
310 memcpy(cmd.args, "\x14\x00\x06\x10\x24\x00", 6);
311 cmd.wlen = 6;
312 cmd.rlen = 4;
313 ret = si2168_cmd_execute(client, &cmd);
314 if (ret)
315 goto err;
316
317 memcpy(cmd.args, "\x14\x00\x07\x10\x00\x24", 6);
318 cmd.wlen = 6;
319 cmd.rlen = 4;
320 ret = si2168_cmd_execute(client, &cmd);
321 if (ret)
322 goto err;
323
324 memcpy(cmd.args, "\x14\x00\x0a\x10\x00\x00", 6);
325 cmd.args[4] = delivery_system | bandwidth;
326 cmd.wlen = 6;
327 cmd.rlen = 4;
328 ret = si2168_cmd_execute(client, &cmd);
329 if (ret)
330 goto err;
331
332 /* set DVB-C symbol rate */
333 if (c->delivery_system == SYS_DVBC_ANNEX_A) {
334 memcpy(cmd.args, "\x14\x00\x02\x11", 4);
335 cmd.args[4] = ((c->symbol_rate / 1000) >> 0) & 0xff;
336 cmd.args[5] = ((c->symbol_rate / 1000) >> 8) & 0xff;
337 cmd.wlen = 6;
338 cmd.rlen = 4;
339 ret = si2168_cmd_execute(client, &cmd);
340 if (ret)
341 goto err;
342 }
343
344 memcpy(cmd.args, "\x14\x00\x0f\x10\x10\x00", 6);
345 cmd.wlen = 6;
346 cmd.rlen = 4;
347 ret = si2168_cmd_execute(client, &cmd);
348 if (ret)
349 goto err;
350
351 memcpy(cmd.args, "\x14\x00\x09\x10\xe3\x08", 6);
352 cmd.args[5] |= dev->ts_clock_inv ? 0x00 : 0x10;
353 cmd.wlen = 6;
354 cmd.rlen = 4;
355 ret = si2168_cmd_execute(client, &cmd);
356 if (ret)
357 goto err;
358
359 memcpy(cmd.args, "\x14\x00\x08\x10\xd7\x05", 6);
360 cmd.args[5] |= dev->ts_clock_inv ? 0x00 : 0x10;
361 cmd.wlen = 6;
362 cmd.rlen = 4;
363 ret = si2168_cmd_execute(client, &cmd);
364 if (ret)
365 goto err;
366
367 memcpy(cmd.args, "\x14\x00\x01\x12\x00\x00", 6);
368 cmd.wlen = 6;
369 cmd.rlen = 4;
370 ret = si2168_cmd_execute(client, &cmd);
371 if (ret)
372 goto err;
373
374 memcpy(cmd.args, "\x14\x00\x01\x03\x0c\x00", 6);
375 cmd.wlen = 6;
376 cmd.rlen = 4;
377 ret = si2168_cmd_execute(client, &cmd);
378 if (ret)
379 goto err;
380
381 memcpy(cmd.args, "\x85", 1);
382 cmd.wlen = 1;
383 cmd.rlen = 1;
384 ret = si2168_cmd_execute(client, &cmd);
385 if (ret)
386 goto err;
387
388 dev->delivery_system = c->delivery_system;
389
390 return 0;
391 err:
392 dev_dbg(&client->dev, "failed=%d\n", ret);
393 return ret;
394 }
395
si2168_init(struct dvb_frontend * fe)396 static int si2168_init(struct dvb_frontend *fe)
397 {
398 struct i2c_client *client = fe->demodulator_priv;
399 struct si2168_dev *dev = i2c_get_clientdata(client);
400 int ret, len, remaining;
401 const struct firmware *fw;
402 const char *fw_name;
403 struct si2168_cmd cmd;
404 unsigned int chip_id;
405
406 dev_dbg(&client->dev, "\n");
407
408 /* initialize */
409 memcpy(cmd.args, "\xc0\x12\x00\x0c\x00\x0d\x16\x00\x00\x00\x00\x00\x00", 13);
410 cmd.wlen = 13;
411 cmd.rlen = 0;
412 ret = si2168_cmd_execute(client, &cmd);
413 if (ret)
414 goto err;
415
416 if (dev->fw_loaded) {
417 /* resume */
418 memcpy(cmd.args, "\xc0\x06\x08\x0f\x00\x20\x21\x01", 8);
419 cmd.wlen = 8;
420 cmd.rlen = 1;
421 ret = si2168_cmd_execute(client, &cmd);
422 if (ret)
423 goto err;
424
425 udelay(100);
426 memcpy(cmd.args, "\x85", 1);
427 cmd.wlen = 1;
428 cmd.rlen = 1;
429 ret = si2168_cmd_execute(client, &cmd);
430 if (ret)
431 goto err;
432
433 goto warm;
434 }
435
436 /* power up */
437 memcpy(cmd.args, "\xc0\x06\x01\x0f\x00\x20\x20\x01", 8);
438 cmd.wlen = 8;
439 cmd.rlen = 1;
440 ret = si2168_cmd_execute(client, &cmd);
441 if (ret)
442 goto err;
443
444 /* query chip revision */
445 memcpy(cmd.args, "\x02", 1);
446 cmd.wlen = 1;
447 cmd.rlen = 13;
448 ret = si2168_cmd_execute(client, &cmd);
449 if (ret)
450 goto err;
451
452 chip_id = cmd.args[1] << 24 | cmd.args[2] << 16 | cmd.args[3] << 8 |
453 cmd.args[4] << 0;
454
455 #define SI2168_A20 ('A' << 24 | 68 << 16 | '2' << 8 | '0' << 0)
456 #define SI2168_A30 ('A' << 24 | 68 << 16 | '3' << 8 | '0' << 0)
457 #define SI2168_B40 ('B' << 24 | 68 << 16 | '4' << 8 | '0' << 0)
458
459 switch (chip_id) {
460 case SI2168_A20:
461 fw_name = SI2168_A20_FIRMWARE;
462 break;
463 case SI2168_A30:
464 fw_name = SI2168_A30_FIRMWARE;
465 break;
466 case SI2168_B40:
467 fw_name = SI2168_B40_FIRMWARE;
468 break;
469 default:
470 dev_err(&client->dev, "unknown chip version Si21%d-%c%c%c\n",
471 cmd.args[2], cmd.args[1],
472 cmd.args[3], cmd.args[4]);
473 ret = -EINVAL;
474 goto err;
475 }
476
477 dev_info(&client->dev, "found a 'Silicon Labs Si21%d-%c%c%c'\n",
478 cmd.args[2], cmd.args[1], cmd.args[3], cmd.args[4]);
479
480 /* request the firmware, this will block and timeout */
481 ret = request_firmware(&fw, fw_name, &client->dev);
482 if (ret) {
483 /* fallback mechanism to handle old name for Si2168 B40 fw */
484 if (chip_id == SI2168_B40) {
485 fw_name = SI2168_B40_FIRMWARE_FALLBACK;
486 ret = request_firmware(&fw, fw_name, &client->dev);
487 }
488
489 if (ret == 0) {
490 dev_notice(&client->dev,
491 "please install firmware file '%s'\n",
492 SI2168_B40_FIRMWARE);
493 } else {
494 dev_err(&client->dev,
495 "firmware file '%s' not found\n",
496 fw_name);
497 goto err_release_firmware;
498 }
499 }
500
501 dev_info(&client->dev, "downloading firmware from file '%s'\n",
502 fw_name);
503
504 if ((fw->size % 17 == 0) && (fw->data[0] > 5)) {
505 /* firmware is in the new format */
506 for (remaining = fw->size; remaining > 0; remaining -= 17) {
507 len = fw->data[fw->size - remaining];
508 if (len > SI2168_ARGLEN) {
509 ret = -EINVAL;
510 break;
511 }
512 memcpy(cmd.args, &fw->data[(fw->size - remaining) + 1], len);
513 cmd.wlen = len;
514 cmd.rlen = 1;
515 ret = si2168_cmd_execute(client, &cmd);
516 if (ret)
517 break;
518 }
519 } else if (fw->size % 8 == 0) {
520 /* firmware is in the old format */
521 for (remaining = fw->size; remaining > 0; remaining -= 8) {
522 len = 8;
523 memcpy(cmd.args, &fw->data[fw->size - remaining], len);
524 cmd.wlen = len;
525 cmd.rlen = 1;
526 ret = si2168_cmd_execute(client, &cmd);
527 if (ret)
528 break;
529 }
530 } else {
531 /* bad or unknown firmware format */
532 ret = -EINVAL;
533 }
534
535 if (ret) {
536 dev_err(&client->dev, "firmware download failed %d\n", ret);
537 goto err_release_firmware;
538 }
539
540 release_firmware(fw);
541
542 memcpy(cmd.args, "\x01\x01", 2);
543 cmd.wlen = 2;
544 cmd.rlen = 1;
545 ret = si2168_cmd_execute(client, &cmd);
546 if (ret)
547 goto err;
548
549 /* query firmware version */
550 memcpy(cmd.args, "\x11", 1);
551 cmd.wlen = 1;
552 cmd.rlen = 10;
553 ret = si2168_cmd_execute(client, &cmd);
554 if (ret)
555 goto err;
556
557 dev_info(&client->dev, "firmware version: %c.%c.%d\n",
558 cmd.args[6], cmd.args[7], cmd.args[8]);
559
560 /* set ts mode */
561 memcpy(cmd.args, "\x14\x00\x01\x10\x10\x00", 6);
562 cmd.args[4] |= dev->ts_mode;
563 if (dev->ts_clock_gapped)
564 cmd.args[4] |= 0x40;
565 cmd.wlen = 6;
566 cmd.rlen = 4;
567 ret = si2168_cmd_execute(client, &cmd);
568 if (ret)
569 goto err;
570
571 dev->fw_loaded = true;
572 warm:
573 dev->active = true;
574
575 return 0;
576
577 err_release_firmware:
578 release_firmware(fw);
579 err:
580 dev_dbg(&client->dev, "failed=%d\n", ret);
581 return ret;
582 }
583
si2168_sleep(struct dvb_frontend * fe)584 static int si2168_sleep(struct dvb_frontend *fe)
585 {
586 struct i2c_client *client = fe->demodulator_priv;
587 struct si2168_dev *dev = i2c_get_clientdata(client);
588 int ret;
589 struct si2168_cmd cmd;
590
591 dev_dbg(&client->dev, "\n");
592
593 dev->active = false;
594
595 memcpy(cmd.args, "\x13", 1);
596 cmd.wlen = 1;
597 cmd.rlen = 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
si2168_get_tune_settings(struct dvb_frontend * fe,struct dvb_frontend_tune_settings * s)608 static int si2168_get_tune_settings(struct dvb_frontend *fe,
609 struct dvb_frontend_tune_settings *s)
610 {
611 s->min_delay_ms = 900;
612
613 return 0;
614 }
615
616 /*
617 * I2C gate logic
618 * We must use unlocked I2C I/O because I2C adapter lock is already taken
619 * by the caller (usually tuner driver).
620 */
si2168_select(struct i2c_adapter * adap,void * mux_priv,u32 chan)621 static int si2168_select(struct i2c_adapter *adap, void *mux_priv, u32 chan)
622 {
623 struct i2c_client *client = mux_priv;
624 int ret;
625 struct si2168_cmd cmd;
626
627 /* open I2C gate */
628 memcpy(cmd.args, "\xc0\x0d\x01", 3);
629 cmd.wlen = 3;
630 cmd.rlen = 0;
631 ret = si2168_cmd_execute_unlocked(client, &cmd);
632 if (ret)
633 goto err;
634
635 return 0;
636 err:
637 dev_dbg(&client->dev, "failed=%d\n", ret);
638 return ret;
639 }
640
si2168_deselect(struct i2c_adapter * adap,void * mux_priv,u32 chan)641 static int si2168_deselect(struct i2c_adapter *adap, void *mux_priv, u32 chan)
642 {
643 struct i2c_client *client = mux_priv;
644 int ret;
645 struct si2168_cmd cmd;
646
647 /* close I2C gate */
648 memcpy(cmd.args, "\xc0\x0d\x00", 3);
649 cmd.wlen = 3;
650 cmd.rlen = 0;
651 ret = si2168_cmd_execute_unlocked(client, &cmd);
652 if (ret)
653 goto err;
654
655 return 0;
656 err:
657 dev_dbg(&client->dev, "failed=%d\n", ret);
658 return ret;
659 }
660
661 static const struct dvb_frontend_ops si2168_ops = {
662 .delsys = {SYS_DVBT, SYS_DVBT2, SYS_DVBC_ANNEX_A},
663 .info = {
664 .name = "Silicon Labs Si2168",
665 .symbol_rate_min = 1000000,
666 .symbol_rate_max = 7200000,
667 .caps = FE_CAN_FEC_1_2 |
668 FE_CAN_FEC_2_3 |
669 FE_CAN_FEC_3_4 |
670 FE_CAN_FEC_5_6 |
671 FE_CAN_FEC_7_8 |
672 FE_CAN_FEC_AUTO |
673 FE_CAN_QPSK |
674 FE_CAN_QAM_16 |
675 FE_CAN_QAM_32 |
676 FE_CAN_QAM_64 |
677 FE_CAN_QAM_128 |
678 FE_CAN_QAM_256 |
679 FE_CAN_QAM_AUTO |
680 FE_CAN_TRANSMISSION_MODE_AUTO |
681 FE_CAN_GUARD_INTERVAL_AUTO |
682 FE_CAN_HIERARCHY_AUTO |
683 FE_CAN_MUTE_TS |
684 FE_CAN_2G_MODULATION |
685 FE_CAN_MULTISTREAM
686 },
687
688 .get_tune_settings = si2168_get_tune_settings,
689
690 .init = si2168_init,
691 .sleep = si2168_sleep,
692
693 .set_frontend = si2168_set_frontend,
694
695 .read_status = si2168_read_status,
696 };
697
si2168_probe(struct i2c_client * client,const struct i2c_device_id * id)698 static int si2168_probe(struct i2c_client *client,
699 const struct i2c_device_id *id)
700 {
701 struct si2168_config *config = client->dev.platform_data;
702 struct si2168_dev *dev;
703 int ret;
704
705 dev_dbg(&client->dev, "\n");
706
707 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
708 if (!dev) {
709 ret = -ENOMEM;
710 dev_err(&client->dev, "kzalloc() failed\n");
711 goto err;
712 }
713
714 /* create mux i2c adapter for tuner */
715 dev->adapter = i2c_add_mux_adapter(client->adapter, &client->dev,
716 client, 0, 0, 0, si2168_select, si2168_deselect);
717 if (dev->adapter == NULL) {
718 ret = -ENODEV;
719 goto err_kfree;
720 }
721
722 /* create dvb_frontend */
723 memcpy(&dev->fe.ops, &si2168_ops, sizeof(struct dvb_frontend_ops));
724 dev->fe.demodulator_priv = client;
725 *config->i2c_adapter = dev->adapter;
726 *config->fe = &dev->fe;
727 dev->ts_mode = config->ts_mode;
728 dev->ts_clock_inv = config->ts_clock_inv;
729 dev->ts_clock_gapped = config->ts_clock_gapped;
730 dev->fw_loaded = false;
731
732 i2c_set_clientdata(client, dev);
733
734 dev_info(&client->dev, "Silicon Labs Si2168 successfully attached\n");
735 return 0;
736 err_kfree:
737 kfree(dev);
738 err:
739 dev_dbg(&client->dev, "failed=%d\n", ret);
740 return ret;
741 }
742
si2168_remove(struct i2c_client * client)743 static int si2168_remove(struct i2c_client *client)
744 {
745 struct si2168_dev *dev = i2c_get_clientdata(client);
746
747 dev_dbg(&client->dev, "\n");
748
749 i2c_del_mux_adapter(dev->adapter);
750
751 dev->fe.ops.release = NULL;
752 dev->fe.demodulator_priv = NULL;
753
754 kfree(dev);
755
756 return 0;
757 }
758
759 static const struct i2c_device_id si2168_id_table[] = {
760 {"si2168", 0},
761 {}
762 };
763 MODULE_DEVICE_TABLE(i2c, si2168_id_table);
764
765 static struct i2c_driver si2168_driver = {
766 .driver = {
767 .name = "si2168",
768 },
769 .probe = si2168_probe,
770 .remove = si2168_remove,
771 .id_table = si2168_id_table,
772 };
773
774 module_i2c_driver(si2168_driver);
775
776 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
777 MODULE_DESCRIPTION("Silicon Labs Si2168 DVB-T/T2/C demodulator driver");
778 MODULE_LICENSE("GPL");
779 MODULE_FIRMWARE(SI2168_A20_FIRMWARE);
780 MODULE_FIRMWARE(SI2168_A30_FIRMWARE);
781 MODULE_FIRMWARE(SI2168_B40_FIRMWARE);
782