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
cmd_init(struct si2168_cmd * cmd,const u8 * buf,int wlen,int rlen)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 */
si2168_cmd_execute(struct i2c_client * client,struct si2168_cmd * cmd)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
si2168_ts_bus_ctrl(struct dvb_frontend * fe,int acquire)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
si2168_read_status(struct dvb_frontend * fe,enum fe_status * status)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
si2168_set_frontend(struct dvb_frontend * fe)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
si2168_init(struct dvb_frontend * fe)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 dev_err(&client->dev,
452 "firmware file '%s' not found\n",
453 dev->firmware_name);
454 goto err_release_firmware;
455 }
456
457 dev_info(&client->dev, "downloading firmware from file '%s'\n",
458 dev->firmware_name);
459
460 if ((fw->size % 17 == 0) && (fw->data[0] > 5)) {
461 /* firmware is in the new format */
462 for (remaining = fw->size; remaining > 0; remaining -= 17) {
463 len = fw->data[fw->size - remaining];
464 if (len > SI2168_ARGLEN) {
465 ret = -EINVAL;
466 break;
467 }
468 cmd_init(&cmd, &fw->data[(fw->size - remaining) + 1],
469 len, 1);
470 ret = si2168_cmd_execute(client, &cmd);
471 if (ret)
472 break;
473 }
474 } else if (fw->size % 8 == 0) {
475 /* firmware is in the old format */
476 for (remaining = fw->size; remaining > 0; remaining -= 8) {
477 cmd_init(&cmd, &fw->data[fw->size - remaining], 8, 1);
478 ret = si2168_cmd_execute(client, &cmd);
479 if (ret)
480 break;
481 }
482 } else {
483 /* bad or unknown firmware format */
484 ret = -EINVAL;
485 }
486
487 if (ret) {
488 dev_err(&client->dev, "firmware download failed %d\n", ret);
489 goto err_release_firmware;
490 }
491
492 release_firmware(fw);
493
494 cmd_init(&cmd, "\x01\x01", 2, 1);
495 ret = si2168_cmd_execute(client, &cmd);
496 if (ret)
497 goto err;
498
499 /* query firmware version */
500 cmd_init(&cmd, "\x11", 1, 10);
501 ret = si2168_cmd_execute(client, &cmd);
502 if (ret)
503 goto err;
504
505 dev->version = (cmd.args[9] + '@') << 24 | (cmd.args[6] - '0') << 16 |
506 (cmd.args[7] - '0') << 8 | (cmd.args[8]) << 0;
507 dev_info(&client->dev, "firmware version: %c %d.%d.%d\n",
508 dev->version >> 24 & 0xff, dev->version >> 16 & 0xff,
509 dev->version >> 8 & 0xff, dev->version >> 0 & 0xff);
510
511 /* set ts mode */
512 ret = si2168_ts_bus_ctrl(fe, 1);
513 if (ret)
514 goto err;
515
516 dev->warm = true;
517 dev->initialized = true;
518 warm:
519 /* Init stats here to indicate which stats are supported */
520 c->cnr.len = 1;
521 c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
522 c->post_bit_error.len = 1;
523 c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
524 c->post_bit_count.len = 1;
525 c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
526 c->block_error.len = 1;
527 c->block_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
528
529 dev->active = true;
530
531 return 0;
532 err_release_firmware:
533 release_firmware(fw);
534 err:
535 dev_dbg(&client->dev, "failed=%d\n", ret);
536 return ret;
537 }
538
si2168_resume(struct dvb_frontend * fe)539 static int si2168_resume(struct dvb_frontend *fe)
540 {
541 struct i2c_client *client = fe->demodulator_priv;
542 struct si2168_dev *dev = i2c_get_clientdata(client);
543
544 /*
545 * check whether si2168_init() has been called successfully
546 * outside of a resume cycle. Only call it (and load firmware)
547 * in this case. si2168_init() is only called during resume
548 * once the device has actually been used. Otherwise, leave the
549 * device untouched.
550 */
551 if (dev->initialized) {
552 dev_dbg(&client->dev, "previously initialized, call si2168_init()\n");
553 return si2168_init(fe);
554 }
555 dev_dbg(&client->dev, "not initialized yet, skipping init on resume\n");
556 return 0;
557 }
558
si2168_sleep(struct dvb_frontend * fe)559 static int si2168_sleep(struct dvb_frontend *fe)
560 {
561 struct i2c_client *client = fe->demodulator_priv;
562 struct si2168_dev *dev = i2c_get_clientdata(client);
563 int ret;
564 struct si2168_cmd cmd;
565
566 dev_dbg(&client->dev, "\n");
567
568 dev->active = false;
569
570 /* tri-state data bus */
571 ret = si2168_ts_bus_ctrl(fe, 0);
572 if (ret)
573 goto err;
574
575 /* Firmware later than B 4.0-11 loses warm state during sleep */
576 if (dev->version > ('B' << 24 | 4 << 16 | 0 << 8 | 11 << 0))
577 dev->warm = false;
578
579 cmd_init(&cmd, "\x13", 1, 0);
580 ret = si2168_cmd_execute(client, &cmd);
581 if (ret)
582 goto err;
583
584 return 0;
585 err:
586 dev_dbg(&client->dev, "failed=%d\n", ret);
587 return ret;
588 }
589
si2168_get_tune_settings(struct dvb_frontend * fe,struct dvb_frontend_tune_settings * s)590 static int si2168_get_tune_settings(struct dvb_frontend *fe,
591 struct dvb_frontend_tune_settings *s)
592 {
593 s->min_delay_ms = 900;
594
595 return 0;
596 }
597
si2168_select(struct i2c_mux_core * muxc,u32 chan)598 static int si2168_select(struct i2c_mux_core *muxc, u32 chan)
599 {
600 struct i2c_client *client = i2c_mux_priv(muxc);
601 int ret;
602 struct si2168_cmd cmd;
603
604 /* open I2C gate */
605 cmd_init(&cmd, "\xc0\x0d\x01", 3, 0);
606 ret = si2168_cmd_execute(client, &cmd);
607 if (ret)
608 goto err;
609
610 return 0;
611 err:
612 dev_dbg(&client->dev, "failed=%d\n", ret);
613 return ret;
614 }
615
si2168_deselect(struct i2c_mux_core * muxc,u32 chan)616 static int si2168_deselect(struct i2c_mux_core *muxc, u32 chan)
617 {
618 struct i2c_client *client = i2c_mux_priv(muxc);
619 int ret;
620 struct si2168_cmd cmd;
621
622 /* close I2C gate */
623 cmd_init(&cmd, "\xc0\x0d\x00", 3, 0);
624 ret = si2168_cmd_execute(client, &cmd);
625 if (ret)
626 goto err;
627
628 return 0;
629 err:
630 dev_dbg(&client->dev, "failed=%d\n", ret);
631 return ret;
632 }
633
634 static const struct dvb_frontend_ops si2168_ops = {
635 .delsys = {SYS_DVBT, SYS_DVBT2, SYS_DVBC_ANNEX_A},
636 .info = {
637 .name = "Silicon Labs Si2168",
638 .frequency_min_hz = 48 * MHz,
639 .frequency_max_hz = 870 * MHz,
640 .frequency_stepsize_hz = 62500,
641 .symbol_rate_min = 1000000,
642 .symbol_rate_max = 7200000,
643 .caps = FE_CAN_FEC_1_2 |
644 FE_CAN_FEC_2_3 |
645 FE_CAN_FEC_3_4 |
646 FE_CAN_FEC_5_6 |
647 FE_CAN_FEC_7_8 |
648 FE_CAN_FEC_AUTO |
649 FE_CAN_QPSK |
650 FE_CAN_QAM_16 |
651 FE_CAN_QAM_32 |
652 FE_CAN_QAM_64 |
653 FE_CAN_QAM_128 |
654 FE_CAN_QAM_256 |
655 FE_CAN_QAM_AUTO |
656 FE_CAN_TRANSMISSION_MODE_AUTO |
657 FE_CAN_GUARD_INTERVAL_AUTO |
658 FE_CAN_HIERARCHY_AUTO |
659 FE_CAN_MUTE_TS |
660 FE_CAN_2G_MODULATION |
661 FE_CAN_MULTISTREAM
662 },
663
664 .get_tune_settings = si2168_get_tune_settings,
665
666 .init = si2168_init,
667 .sleep = si2168_sleep,
668 .resume = si2168_resume,
669
670 .set_frontend = si2168_set_frontend,
671
672 .read_status = si2168_read_status,
673 };
674
si2168_probe(struct i2c_client * client)675 static int si2168_probe(struct i2c_client *client)
676 {
677 struct si2168_config *config = client->dev.platform_data;
678 struct si2168_dev *dev;
679 int ret;
680 struct si2168_cmd cmd;
681
682 dev_dbg(&client->dev, "\n");
683
684 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
685 if (!dev) {
686 ret = -ENOMEM;
687 goto err;
688 }
689
690 i2c_set_clientdata(client, dev);
691 mutex_init(&dev->i2c_mutex);
692
693 /* Initialize */
694 cmd_init(&cmd, "\xc0\x12\x00\x0c\x00\x0d\x16\x00\x00\x00\x00\x00\x00",
695 13, 0);
696 ret = si2168_cmd_execute(client, &cmd);
697 if (ret)
698 goto err_kfree;
699
700 /* Power up */
701 cmd_init(&cmd, "\xc0\x06\x01\x0f\x00\x20\x20\x01", 8, 1);
702 ret = si2168_cmd_execute(client, &cmd);
703 if (ret)
704 goto err_kfree;
705
706 /* Query chip revision */
707 cmd_init(&cmd, "\x02", 1, 13);
708 ret = si2168_cmd_execute(client, &cmd);
709 if (ret)
710 goto err_kfree;
711
712 dev->chip_id = cmd.args[1] << 24 | cmd.args[2] << 16 |
713 cmd.args[3] << 8 | cmd.args[4] << 0;
714
715 switch (dev->chip_id) {
716 case SI2168_CHIP_ID_A20:
717 dev->firmware_name = SI2168_A20_FIRMWARE;
718 break;
719 case SI2168_CHIP_ID_A30:
720 dev->firmware_name = SI2168_A30_FIRMWARE;
721 break;
722 case SI2168_CHIP_ID_B40:
723 dev->firmware_name = SI2168_B40_FIRMWARE;
724 break;
725 case SI2168_CHIP_ID_D60:
726 dev->firmware_name = SI2168_D60_FIRMWARE;
727 break;
728 default:
729 dev_dbg(&client->dev, "unknown chip version Si21%d-%c%c%c\n",
730 cmd.args[2], cmd.args[1], cmd.args[3], cmd.args[4]);
731 ret = -ENODEV;
732 goto err_kfree;
733 }
734
735 dev->version = (cmd.args[1]) << 24 | (cmd.args[3] - '0') << 16 |
736 (cmd.args[4] - '0') << 8 | (cmd.args[5]) << 0;
737
738 /* create mux i2c adapter for tuner */
739 dev->muxc = i2c_mux_alloc(client->adapter, &client->dev,
740 1, 0, I2C_MUX_LOCKED,
741 si2168_select, si2168_deselect);
742 if (!dev->muxc) {
743 ret = -ENOMEM;
744 goto err_kfree;
745 }
746 dev->muxc->priv = client;
747 ret = i2c_mux_add_adapter(dev->muxc, 0, 0);
748 if (ret)
749 goto err_kfree;
750
751 /* create dvb_frontend */
752 memcpy(&dev->fe.ops, &si2168_ops, sizeof(struct dvb_frontend_ops));
753 dev->fe.demodulator_priv = client;
754 *config->i2c_adapter = dev->muxc->adapter[0];
755 *config->fe = &dev->fe;
756 dev->ts_mode = config->ts_mode;
757 dev->ts_clock_inv = config->ts_clock_inv;
758 dev->ts_clock_gapped = config->ts_clock_gapped;
759 dev->spectral_inversion = config->spectral_inversion;
760
761 dev_info(&client->dev, "Silicon Labs Si2168-%c%d%d successfully identified\n",
762 dev->version >> 24 & 0xff, dev->version >> 16 & 0xff,
763 dev->version >> 8 & 0xff);
764 dev_info(&client->dev, "firmware version: %c %d.%d.%d\n",
765 dev->version >> 24 & 0xff, dev->version >> 16 & 0xff,
766 dev->version >> 8 & 0xff, dev->version >> 0 & 0xff);
767
768 return 0;
769 err_kfree:
770 kfree(dev);
771 err:
772 dev_warn(&client->dev, "probe failed = %d\n", ret);
773 return ret;
774 }
775
si2168_remove(struct i2c_client * client)776 static void si2168_remove(struct i2c_client *client)
777 {
778 struct si2168_dev *dev = i2c_get_clientdata(client);
779
780 dev_dbg(&client->dev, "\n");
781
782 i2c_mux_del_adapters(dev->muxc);
783
784 dev->fe.ops.release = NULL;
785 dev->fe.demodulator_priv = NULL;
786
787 kfree(dev);
788 }
789
790 static const struct i2c_device_id si2168_id_table[] = {
791 { "si2168" },
792 {}
793 };
794 MODULE_DEVICE_TABLE(i2c, si2168_id_table);
795
796 static struct i2c_driver si2168_driver = {
797 .driver = {
798 .name = "si2168",
799 .suppress_bind_attrs = true,
800 },
801 .probe = si2168_probe,
802 .remove = si2168_remove,
803 .id_table = si2168_id_table,
804 };
805
806 module_i2c_driver(si2168_driver);
807
808 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
809 MODULE_DESCRIPTION("Silicon Labs Si2168 DVB-T/T2/C demodulator driver");
810 MODULE_LICENSE("GPL");
811 MODULE_FIRMWARE(SI2168_A20_FIRMWARE);
812 MODULE_FIRMWARE(SI2168_A30_FIRMWARE);
813 MODULE_FIRMWARE(SI2168_B40_FIRMWARE);
814 MODULE_FIRMWARE(SI2168_D60_FIRMWARE);
815