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17#include "si2168_priv.h"
18
19static const struct dvb_frontend_ops si2168_ops;
20
21
22static 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
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
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
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 if (!((cmd->args[0] >> 7) & 0x01)) {
64 ret = -ETIMEDOUT;
65 goto err_mutex_unlock;
66 }
67 }
68
69 mutex_unlock(&dev->i2c_mutex);
70 return 0;
71
72err_mutex_unlock:
73 mutex_unlock(&dev->i2c_mutex);
74 dev_dbg(&client->dev, "failed=%d\n", ret);
75 return ret;
76}
77
78static int si2168_read_status(struct dvb_frontend *fe, fe_status_t *status)
79{
80 struct i2c_client *client = fe->demodulator_priv;
81 struct si2168_dev *dev = i2c_get_clientdata(client);
82 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
83 int ret;
84 struct si2168_cmd cmd;
85
86 *status = 0;
87
88 if (!dev->active) {
89 ret = -EAGAIN;
90 goto err;
91 }
92
93 switch (c->delivery_system) {
94 case SYS_DVBT:
95 memcpy(cmd.args, "\xa0\x01", 2);
96 cmd.wlen = 2;
97 cmd.rlen = 13;
98 break;
99 case SYS_DVBC_ANNEX_A:
100 memcpy(cmd.args, "\x90\x01", 2);
101 cmd.wlen = 2;
102 cmd.rlen = 9;
103 break;
104 case SYS_DVBT2:
105 memcpy(cmd.args, "\x50\x01", 2);
106 cmd.wlen = 2;
107 cmd.rlen = 14;
108 break;
109 default:
110 ret = -EINVAL;
111 goto err;
112 }
113
114 ret = si2168_cmd_execute(client, &cmd);
115 if (ret)
116 goto err;
117
118 switch ((cmd.args[2] >> 1) & 0x03) {
119 case 0x01:
120 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER;
121 break;
122 case 0x03:
123 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_VITERBI |
124 FE_HAS_SYNC | FE_HAS_LOCK;
125 break;
126 }
127
128 dev->fe_status = *status;
129
130 if (*status & FE_HAS_LOCK) {
131 c->cnr.len = 1;
132 c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
133 c->cnr.stat[0].svalue = cmd.args[3] * 1000 / 4;
134 } else {
135 c->cnr.len = 1;
136 c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
137 }
138
139 dev_dbg(&client->dev, "status=%02x args=%*ph\n",
140 *status, cmd.rlen, cmd.args);
141
142 return 0;
143err:
144 dev_dbg(&client->dev, "failed=%d\n", ret);
145 return ret;
146}
147
148static int si2168_set_frontend(struct dvb_frontend *fe)
149{
150 struct i2c_client *client = fe->demodulator_priv;
151 struct si2168_dev *dev = i2c_get_clientdata(client);
152 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
153 int ret;
154 struct si2168_cmd cmd;
155 u8 bandwidth, delivery_system;
156
157 dev_dbg(&client->dev,
158 "delivery_system=%u modulation=%u frequency=%u bandwidth_hz=%u symbol_rate=%u inversion=%u stream_id=%u\n",
159 c->delivery_system, c->modulation, c->frequency,
160 c->bandwidth_hz, c->symbol_rate, c->inversion,
161 c->stream_id);
162
163 if (!dev->active) {
164 ret = -EAGAIN;
165 goto err;
166 }
167
168 switch (c->delivery_system) {
169 case SYS_DVBT:
170 delivery_system = 0x20;
171 break;
172 case SYS_DVBC_ANNEX_A:
173 delivery_system = 0x30;
174 break;
175 case SYS_DVBT2:
176 delivery_system = 0x70;
177 break;
178 default:
179 ret = -EINVAL;
180 goto err;
181 }
182
183 if (c->bandwidth_hz == 0) {
184 ret = -EINVAL;
185 goto err;
186 } else if (c->bandwidth_hz <= 2000000)
187 bandwidth = 0x02;
188 else if (c->bandwidth_hz <= 5000000)
189 bandwidth = 0x05;
190 else if (c->bandwidth_hz <= 6000000)
191 bandwidth = 0x06;
192 else if (c->bandwidth_hz <= 7000000)
193 bandwidth = 0x07;
194 else if (c->bandwidth_hz <= 8000000)
195 bandwidth = 0x08;
196 else if (c->bandwidth_hz <= 9000000)
197 bandwidth = 0x09;
198 else if (c->bandwidth_hz <= 10000000)
199 bandwidth = 0x0a;
200 else
201 bandwidth = 0x0f;
202
203
204 if (fe->ops.tuner_ops.set_params) {
205 ret = fe->ops.tuner_ops.set_params(fe);
206 if (ret)
207 goto err;
208 }
209
210 memcpy(cmd.args, "\x88\x02\x02\x02\x02", 5);
211 cmd.wlen = 5;
212 cmd.rlen = 5;
213 ret = si2168_cmd_execute(client, &cmd);
214 if (ret)
215 goto err;
216
217
218 if (c->delivery_system == SYS_DVBT)
219 memcpy(cmd.args, "\x89\x21\x06\x11\xff\x98", 6);
220 else if (c->delivery_system == SYS_DVBC_ANNEX_A)
221 memcpy(cmd.args, "\x89\x21\x06\x11\x89\xf0", 6);
222 else if (c->delivery_system == SYS_DVBT2)
223 memcpy(cmd.args, "\x89\x21\x06\x11\x89\x20", 6);
224 cmd.wlen = 6;
225 cmd.rlen = 3;
226 ret = si2168_cmd_execute(client, &cmd);
227 if (ret)
228 goto err;
229
230 if (c->delivery_system == SYS_DVBT2) {
231
232 cmd.args[0] = 0x52;
233 cmd.args[1] = c->stream_id & 0xff;
234 cmd.args[2] = c->stream_id == NO_STREAM_ID_FILTER ? 0 : 1;
235 cmd.wlen = 3;
236 cmd.rlen = 1;
237 ret = si2168_cmd_execute(client, &cmd);
238 if (ret)
239 goto err;
240 }
241
242 memcpy(cmd.args, "\x51\x03", 2);
243 cmd.wlen = 2;
244 cmd.rlen = 12;
245 ret = si2168_cmd_execute(client, &cmd);
246 if (ret)
247 goto err;
248
249 memcpy(cmd.args, "\x12\x08\x04", 3);
250 cmd.wlen = 3;
251 cmd.rlen = 3;
252 ret = si2168_cmd_execute(client, &cmd);
253 if (ret)
254 goto err;
255
256 memcpy(cmd.args, "\x14\x00\x0c\x10\x12\x00", 6);
257 cmd.wlen = 6;
258 cmd.rlen = 4;
259 ret = si2168_cmd_execute(client, &cmd);
260 if (ret)
261 goto err;
262
263 memcpy(cmd.args, "\x14\x00\x06\x10\x24\x00", 6);
264 cmd.wlen = 6;
265 cmd.rlen = 4;
266 ret = si2168_cmd_execute(client, &cmd);
267 if (ret)
268 goto err;
269
270 memcpy(cmd.args, "\x14\x00\x07\x10\x00\x24", 6);
271 cmd.wlen = 6;
272 cmd.rlen = 4;
273 ret = si2168_cmd_execute(client, &cmd);
274 if (ret)
275 goto err;
276
277 memcpy(cmd.args, "\x14\x00\x0a\x10\x00\x00", 6);
278 cmd.args[4] = delivery_system | bandwidth;
279 cmd.wlen = 6;
280 cmd.rlen = 4;
281 ret = si2168_cmd_execute(client, &cmd);
282 if (ret)
283 goto err;
284
285
286 if (c->delivery_system == SYS_DVBC_ANNEX_A) {
287 memcpy(cmd.args, "\x14\x00\x02\x11", 4);
288 cmd.args[4] = ((c->symbol_rate / 1000) >> 0) & 0xff;
289 cmd.args[5] = ((c->symbol_rate / 1000) >> 8) & 0xff;
290 cmd.wlen = 6;
291 cmd.rlen = 4;
292 ret = si2168_cmd_execute(client, &cmd);
293 if (ret)
294 goto err;
295 }
296
297 memcpy(cmd.args, "\x14\x00\x0f\x10\x10\x00", 6);
298 cmd.wlen = 6;
299 cmd.rlen = 4;
300 ret = si2168_cmd_execute(client, &cmd);
301 if (ret)
302 goto err;
303
304 memcpy(cmd.args, "\x14\x00\x09\x10\xe3\x08", 6);
305 cmd.args[5] |= dev->ts_clock_inv ? 0x00 : 0x10;
306 cmd.wlen = 6;
307 cmd.rlen = 4;
308 ret = si2168_cmd_execute(client, &cmd);
309 if (ret)
310 goto err;
311
312 memcpy(cmd.args, "\x14\x00\x08\x10\xd7\x05", 6);
313 cmd.args[5] |= dev->ts_clock_inv ? 0x00 : 0x10;
314 cmd.wlen = 6;
315 cmd.rlen = 4;
316 ret = si2168_cmd_execute(client, &cmd);
317 if (ret)
318 goto err;
319
320 memcpy(cmd.args, "\x14\x00\x01\x12\x00\x00", 6);
321 cmd.wlen = 6;
322 cmd.rlen = 4;
323 ret = si2168_cmd_execute(client, &cmd);
324 if (ret)
325 goto err;
326
327 memcpy(cmd.args, "\x14\x00\x01\x03\x0c\x00", 6);
328 cmd.wlen = 6;
329 cmd.rlen = 4;
330 ret = si2168_cmd_execute(client, &cmd);
331 if (ret)
332 goto err;
333
334 memcpy(cmd.args, "\x85", 1);
335 cmd.wlen = 1;
336 cmd.rlen = 1;
337 ret = si2168_cmd_execute(client, &cmd);
338 if (ret)
339 goto err;
340
341 dev->delivery_system = c->delivery_system;
342
343 return 0;
344err:
345 dev_dbg(&client->dev, "failed=%d\n", ret);
346 return ret;
347}
348
349static int si2168_init(struct dvb_frontend *fe)
350{
351 struct i2c_client *client = fe->demodulator_priv;
352 struct si2168_dev *dev = i2c_get_clientdata(client);
353 int ret, len, remaining;
354 const struct firmware *fw;
355 const char *fw_name;
356 struct si2168_cmd cmd;
357 unsigned int chip_id;
358
359 dev_dbg(&client->dev, "\n");
360
361
362 memcpy(cmd.args, "\xc0\x12\x00\x0c\x00\x0d\x16\x00\x00\x00\x00\x00\x00", 13);
363 cmd.wlen = 13;
364 cmd.rlen = 0;
365 ret = si2168_cmd_execute(client, &cmd);
366 if (ret)
367 goto err;
368
369 if (dev->fw_loaded) {
370
371 memcpy(cmd.args, "\xc0\x06\x08\x0f\x00\x20\x21\x01", 8);
372 cmd.wlen = 8;
373 cmd.rlen = 1;
374 ret = si2168_cmd_execute(client, &cmd);
375 if (ret)
376 goto err;
377
378 memcpy(cmd.args, "\x85", 1);
379 cmd.wlen = 1;
380 cmd.rlen = 1;
381 ret = si2168_cmd_execute(client, &cmd);
382 if (ret)
383 goto err;
384
385 goto warm;
386 }
387
388
389 memcpy(cmd.args, "\xc0\x06\x01\x0f\x00\x20\x20\x01", 8);
390 cmd.wlen = 8;
391 cmd.rlen = 1;
392 ret = si2168_cmd_execute(client, &cmd);
393 if (ret)
394 goto err;
395
396
397 memcpy(cmd.args, "\x02", 1);
398 cmd.wlen = 1;
399 cmd.rlen = 13;
400 ret = si2168_cmd_execute(client, &cmd);
401 if (ret)
402 goto err;
403
404 chip_id = cmd.args[1] << 24 | cmd.args[2] << 16 | cmd.args[3] << 8 |
405 cmd.args[4] << 0;
406
407 #define SI2168_A20 ('A' << 24 | 68 << 16 | '2' << 8 | '0' << 0)
408 #define SI2168_A30 ('A' << 24 | 68 << 16 | '3' << 8 | '0' << 0)
409 #define SI2168_B40 ('B' << 24 | 68 << 16 | '4' << 8 | '0' << 0)
410
411 switch (chip_id) {
412 case SI2168_A20:
413 fw_name = SI2168_A20_FIRMWARE;
414 break;
415 case SI2168_A30:
416 fw_name = SI2168_A30_FIRMWARE;
417 break;
418 case SI2168_B40:
419 fw_name = SI2168_B40_FIRMWARE;
420 break;
421 default:
422 dev_err(&client->dev, "unknown chip version Si21%d-%c%c%c\n",
423 cmd.args[2], cmd.args[1],
424 cmd.args[3], cmd.args[4]);
425 ret = -EINVAL;
426 goto err;
427 }
428
429 dev_info(&client->dev, "found a 'Silicon Labs Si21%d-%c%c%c'\n",
430 cmd.args[2], cmd.args[1], cmd.args[3], cmd.args[4]);
431
432
433 ret = request_firmware(&fw, fw_name, &client->dev);
434 if (ret) {
435
436 if (chip_id == SI2168_B40) {
437 fw_name = SI2168_B40_FIRMWARE_FALLBACK;
438 ret = request_firmware(&fw, fw_name, &client->dev);
439 }
440
441 if (ret == 0) {
442 dev_notice(&client->dev,
443 "please install firmware file '%s'\n",
444 SI2168_B40_FIRMWARE);
445 } else {
446 dev_err(&client->dev,
447 "firmware file '%s' not found\n",
448 fw_name);
449 goto err_release_firmware;
450 }
451 }
452
453 dev_info(&client->dev, "downloading firmware from file '%s'\n",
454 fw_name);
455
456 if ((fw->size % 17 == 0) && (fw->data[0] > 5)) {
457
458 for (remaining = fw->size; remaining > 0; remaining -= 17) {
459 len = fw->data[fw->size - remaining];
460 memcpy(cmd.args, &fw->data[(fw->size - remaining) + 1], len);
461 cmd.wlen = len;
462 cmd.rlen = 1;
463 ret = si2168_cmd_execute(client, &cmd);
464 if (ret)
465 break;
466 }
467 } else if (fw->size % 8 == 0) {
468
469 for (remaining = fw->size; remaining > 0; remaining -= 8) {
470 len = 8;
471 memcpy(cmd.args, &fw->data[fw->size - remaining], len);
472 cmd.wlen = len;
473 cmd.rlen = 1;
474 ret = si2168_cmd_execute(client, &cmd);
475 if (ret)
476 break;
477 }
478 } else {
479
480 ret = -EINVAL;
481 }
482
483 if (ret) {
484 dev_err(&client->dev, "firmware download failed %d\n", ret);
485 goto err_release_firmware;
486 }
487
488 release_firmware(fw);
489
490 memcpy(cmd.args, "\x01\x01", 2);
491 cmd.wlen = 2;
492 cmd.rlen = 1;
493 ret = si2168_cmd_execute(client, &cmd);
494 if (ret)
495 goto err;
496
497
498 memcpy(cmd.args, "\x11", 1);
499 cmd.wlen = 1;
500 cmd.rlen = 10;
501 ret = si2168_cmd_execute(client, &cmd);
502 if (ret)
503 goto err;
504
505 dev_info(&client->dev, "firmware version: %c.%c.%d\n",
506 cmd.args[6], cmd.args[7], cmd.args[8]);
507
508
509 memcpy(cmd.args, "\x14\x00\x01\x10\x10\x00", 6);
510 cmd.args[4] |= dev->ts_mode;
511 cmd.wlen = 6;
512 cmd.rlen = 4;
513 ret = si2168_cmd_execute(client, &cmd);
514 if (ret)
515 goto err;
516
517 dev->fw_loaded = true;
518warm:
519 dev->active = true;
520
521 return 0;
522
523err_release_firmware:
524 release_firmware(fw);
525err:
526 dev_dbg(&client->dev, "failed=%d\n", ret);
527 return ret;
528}
529
530static int si2168_sleep(struct dvb_frontend *fe)
531{
532 struct i2c_client *client = fe->demodulator_priv;
533 struct si2168_dev *dev = i2c_get_clientdata(client);
534 int ret;
535 struct si2168_cmd cmd;
536
537 dev_dbg(&client->dev, "\n");
538
539 dev->active = false;
540
541 memcpy(cmd.args, "\x13", 1);
542 cmd.wlen = 1;
543 cmd.rlen = 0;
544 ret = si2168_cmd_execute(client, &cmd);
545 if (ret)
546 goto err;
547
548 return 0;
549err:
550 dev_dbg(&client->dev, "failed=%d\n", ret);
551 return ret;
552}
553
554static int si2168_get_tune_settings(struct dvb_frontend *fe,
555 struct dvb_frontend_tune_settings *s)
556{
557 s->min_delay_ms = 900;
558
559 return 0;
560}
561
562
563
564
565
566
567static int si2168_select(struct i2c_adapter *adap, void *mux_priv, u32 chan)
568{
569 struct i2c_client *client = mux_priv;
570 struct si2168_dev *dev = i2c_get_clientdata(client);
571 int ret;
572 struct i2c_msg gate_open_msg = {
573 .addr = client->addr,
574 .flags = 0,
575 .len = 3,
576 .buf = "\xc0\x0d\x01",
577 };
578
579 mutex_lock(&dev->i2c_mutex);
580
581
582 ret = __i2c_transfer(client->adapter, &gate_open_msg, 1);
583 if (ret != 1) {
584 dev_warn(&client->dev, "i2c write failed=%d\n", ret);
585 if (ret >= 0)
586 ret = -EREMOTEIO;
587 } else {
588 ret = 0;
589 }
590
591 return ret;
592}
593
594static int si2168_deselect(struct i2c_adapter *adap, void *mux_priv, u32 chan)
595{
596 struct i2c_client *client = mux_priv;
597 struct si2168_dev *dev = i2c_get_clientdata(client);
598 int ret;
599 struct i2c_msg gate_close_msg = {
600 .addr = client->addr,
601 .flags = 0,
602 .len = 3,
603 .buf = "\xc0\x0d\x00",
604 };
605
606
607 ret = __i2c_transfer(client->adapter, &gate_close_msg, 1);
608 if (ret != 1) {
609 dev_warn(&client->dev, "i2c write failed=%d\n", ret);
610 if (ret >= 0)
611 ret = -EREMOTEIO;
612 } else {
613 ret = 0;
614 }
615
616 mutex_unlock(&dev->i2c_mutex);
617
618 return ret;
619}
620
621static const struct dvb_frontend_ops si2168_ops = {
622 .delsys = {SYS_DVBT, SYS_DVBT2, SYS_DVBC_ANNEX_A},
623 .info = {
624 .name = "Silicon Labs Si2168",
625 .symbol_rate_min = 1000000,
626 .symbol_rate_max = 7200000,
627 .caps = FE_CAN_FEC_1_2 |
628 FE_CAN_FEC_2_3 |
629 FE_CAN_FEC_3_4 |
630 FE_CAN_FEC_5_6 |
631 FE_CAN_FEC_7_8 |
632 FE_CAN_FEC_AUTO |
633 FE_CAN_QPSK |
634 FE_CAN_QAM_16 |
635 FE_CAN_QAM_32 |
636 FE_CAN_QAM_64 |
637 FE_CAN_QAM_128 |
638 FE_CAN_QAM_256 |
639 FE_CAN_QAM_AUTO |
640 FE_CAN_TRANSMISSION_MODE_AUTO |
641 FE_CAN_GUARD_INTERVAL_AUTO |
642 FE_CAN_HIERARCHY_AUTO |
643 FE_CAN_MUTE_TS |
644 FE_CAN_2G_MODULATION |
645 FE_CAN_MULTISTREAM
646 },
647
648 .get_tune_settings = si2168_get_tune_settings,
649
650 .init = si2168_init,
651 .sleep = si2168_sleep,
652
653 .set_frontend = si2168_set_frontend,
654
655 .read_status = si2168_read_status,
656};
657
658static int si2168_probe(struct i2c_client *client,
659 const struct i2c_device_id *id)
660{
661 struct si2168_config *config = client->dev.platform_data;
662 struct si2168_dev *dev;
663 int ret;
664
665 dev_dbg(&client->dev, "\n");
666
667 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
668 if (!dev) {
669 ret = -ENOMEM;
670 dev_err(&client->dev, "kzalloc() failed\n");
671 goto err;
672 }
673
674 mutex_init(&dev->i2c_mutex);
675
676
677 dev->adapter = i2c_add_mux_adapter(client->adapter, &client->dev,
678 client, 0, 0, 0, si2168_select, si2168_deselect);
679 if (dev->adapter == NULL) {
680 ret = -ENODEV;
681 goto err_kfree;
682 }
683
684
685 memcpy(&dev->fe.ops, &si2168_ops, sizeof(struct dvb_frontend_ops));
686 dev->fe.demodulator_priv = client;
687 *config->i2c_adapter = dev->adapter;
688 *config->fe = &dev->fe;
689 dev->ts_mode = config->ts_mode;
690 dev->ts_clock_inv = config->ts_clock_inv;
691 dev->fw_loaded = false;
692
693 i2c_set_clientdata(client, dev);
694
695 dev_info(&client->dev, "Silicon Labs Si2168 successfully attached\n");
696 return 0;
697err_kfree:
698 kfree(dev);
699err:
700 dev_dbg(&client->dev, "failed=%d\n", ret);
701 return ret;
702}
703
704static int si2168_remove(struct i2c_client *client)
705{
706 struct si2168_dev *dev = i2c_get_clientdata(client);
707
708 dev_dbg(&client->dev, "\n");
709
710 i2c_del_mux_adapter(dev->adapter);
711
712 dev->fe.ops.release = NULL;
713 dev->fe.demodulator_priv = NULL;
714
715 kfree(dev);
716
717 return 0;
718}
719
720static const struct i2c_device_id si2168_id_table[] = {
721 {"si2168", 0},
722 {}
723};
724MODULE_DEVICE_TABLE(i2c, si2168_id_table);
725
726static struct i2c_driver si2168_driver = {
727 .driver = {
728 .owner = THIS_MODULE,
729 .name = "si2168",
730 },
731 .probe = si2168_probe,
732 .remove = si2168_remove,
733 .id_table = si2168_id_table,
734};
735
736module_i2c_driver(si2168_driver);
737
738MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
739MODULE_DESCRIPTION("Silicon Labs Si2168 DVB-T/T2/C demodulator driver");
740MODULE_LICENSE("GPL");
741MODULE_FIRMWARE(SI2168_A20_FIRMWARE);
742MODULE_FIRMWARE(SI2168_A30_FIRMWARE);
743MODULE_FIRMWARE(SI2168_B40_FIRMWARE);
744
