1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Silicon Labs Si2146/2147/2148/2157/2158 silicon tuner driver
4 *
5 * Copyright (C) 2014 Antti Palosaari <crope@iki.fi>
6 */
7
8 #include "si2157_priv.h"
9
10 static const struct dvb_tuner_ops si2157_ops;
11
12 static int tuner_lock_debug;
13 module_param(tuner_lock_debug, int, 0644);
14 MODULE_PARM_DESC(tuner_lock_debug, "if set, signal lock is briefly waited on after setting params");
15
16 /* execute firmware command */
si2157_cmd_execute(struct i2c_client * client,struct si2157_cmd * cmd)17 static int si2157_cmd_execute(struct i2c_client *client, struct si2157_cmd *cmd)
18 {
19 struct si2157_dev *dev = i2c_get_clientdata(client);
20 int ret;
21 unsigned long timeout;
22
23 mutex_lock(&dev->i2c_mutex);
24
25 if (cmd->wlen) {
26 /* write cmd and args for firmware */
27 ret = i2c_master_send(client, cmd->args, cmd->wlen);
28 if (ret < 0) {
29 goto err_mutex_unlock;
30 } else if (ret != cmd->wlen) {
31 ret = -EREMOTEIO;
32 goto err_mutex_unlock;
33 }
34 }
35
36 if (cmd->rlen) {
37 /* wait cmd execution terminate */
38 #define TIMEOUT 80
39 timeout = jiffies + msecs_to_jiffies(TIMEOUT);
40 while (!time_after(jiffies, timeout)) {
41 ret = i2c_master_recv(client, cmd->args, cmd->rlen);
42 if (ret < 0) {
43 goto err_mutex_unlock;
44 } else if (ret != cmd->rlen) {
45 ret = -EREMOTEIO;
46 goto err_mutex_unlock;
47 }
48
49 /* firmware ready? */
50 if ((cmd->args[0] >> 7) & 0x01)
51 break;
52 }
53
54 dev_dbg(&client->dev, "cmd execution took %d ms, status=%x\n",
55 jiffies_to_msecs(jiffies) -
56 (jiffies_to_msecs(timeout) - TIMEOUT),
57 cmd->args[0]);
58
59 if (!((cmd->args[0] >> 7) & 0x01)) {
60 ret = -ETIMEDOUT;
61 goto err_mutex_unlock;
62 }
63 /* check error status bit */
64 if (cmd->args[0] & 0x40) {
65 ret = -EAGAIN;
66 goto err_mutex_unlock;
67 }
68 }
69
70 mutex_unlock(&dev->i2c_mutex);
71 return 0;
72
73 err_mutex_unlock:
74 mutex_unlock(&dev->i2c_mutex);
75 dev_dbg(&client->dev, "failed=%d\n", ret);
76 return ret;
77 }
78
79 static const struct si2157_tuner_info si2157_tuners[] = {
80 { SI2141, 0x60, false, SI2141_60_FIRMWARE, SI2141_A10_FIRMWARE },
81 { SI2141, 0x61, false, SI2141_61_FIRMWARE, SI2141_A10_FIRMWARE },
82 { SI2146, 0x11, false, SI2146_11_FIRMWARE, NULL },
83 { SI2147, 0x50, false, SI2147_50_FIRMWARE, NULL },
84 { SI2148, 0x32, true, SI2148_32_FIRMWARE, SI2158_A20_FIRMWARE },
85 { SI2148, 0x33, true, SI2148_33_FIRMWARE, SI2158_A20_FIRMWARE },
86 { SI2157, 0x50, false, SI2157_50_FIRMWARE, SI2157_A30_FIRMWARE },
87 { SI2158, 0x50, false, SI2158_50_FIRMWARE, SI2158_A20_FIRMWARE },
88 { SI2158, 0x51, false, SI2158_51_FIRMWARE, SI2158_A20_FIRMWARE },
89 { SI2177, 0x50, false, SI2177_50_FIRMWARE, SI2157_A30_FIRMWARE },
90 };
91
si2157_load_firmware(struct dvb_frontend * fe,const char * fw_name)92 static int si2157_load_firmware(struct dvb_frontend *fe,
93 const char *fw_name)
94 {
95 struct i2c_client *client = fe->tuner_priv;
96 const struct firmware *fw;
97 int ret, len, remaining;
98 struct si2157_cmd cmd;
99
100 /* request the firmware, this will block and timeout */
101 ret = firmware_request_nowarn(&fw, fw_name, &client->dev);
102 if (ret)
103 return ret;
104
105 /* firmware should be n chunks of 17 bytes */
106 if (fw->size % 17 != 0) {
107 dev_err(&client->dev, "firmware file '%s' is invalid\n",
108 fw_name);
109 ret = -EINVAL;
110 goto err_release_firmware;
111 }
112
113 dev_info(&client->dev, "downloading firmware from file '%s'\n",
114 fw_name);
115
116 for (remaining = fw->size; remaining > 0; remaining -= 17) {
117 len = fw->data[fw->size - remaining];
118 if (len > SI2157_ARGLEN) {
119 dev_err(&client->dev, "Bad firmware length\n");
120 ret = -EINVAL;
121 goto err_release_firmware;
122 }
123 memcpy(cmd.args, &fw->data[(fw->size - remaining) + 1], len);
124 cmd.wlen = len;
125 cmd.rlen = 1;
126 ret = si2157_cmd_execute(client, &cmd);
127 if (ret) {
128 dev_err(&client->dev, "firmware download failed %d\n",
129 ret);
130 goto err_release_firmware;
131 }
132 }
133
134 err_release_firmware:
135 release_firmware(fw);
136
137 return ret;
138 }
139
si2157_find_and_load_firmware(struct dvb_frontend * fe)140 static int si2157_find_and_load_firmware(struct dvb_frontend *fe)
141 {
142 struct i2c_client *client = fe->tuner_priv;
143 struct si2157_dev *dev = i2c_get_clientdata(client);
144 const char *fw_alt_name = NULL;
145 unsigned char part_id, rom_id;
146 const char *fw_name = NULL;
147 struct si2157_cmd cmd;
148 bool required = true;
149 int ret, i;
150
151 if (dev->dont_load_firmware) {
152 dev_info(&client->dev,
153 "device is buggy, skipping firmware download\n");
154 return 0;
155 }
156
157 /* query chip revision */
158 memcpy(cmd.args, "\x02", 1);
159 cmd.wlen = 1;
160 cmd.rlen = 13;
161 ret = si2157_cmd_execute(client, &cmd);
162 if (ret)
163 return ret;
164
165 part_id = cmd.args[2];
166 rom_id = cmd.args[12];
167
168 for (i = 0; i < ARRAY_SIZE(si2157_tuners); i++) {
169 if (si2157_tuners[i].part_id != part_id)
170 continue;
171 required = si2157_tuners[i].required;
172 fw_alt_name = si2157_tuners[i].fw_alt_name;
173
174 /* Both part and rom ID match */
175 if (si2157_tuners[i].rom_id == rom_id) {
176 fw_name = si2157_tuners[i].fw_name;
177 break;
178 }
179 }
180
181 if (required && !fw_name && !fw_alt_name) {
182 dev_err(&client->dev,
183 "unknown chip version Si21%d-%c%c%c ROM 0x%02x\n",
184 part_id, cmd.args[1], cmd.args[3], cmd.args[4], rom_id);
185 return -EINVAL;
186 }
187
188 /* Update the part id based on device's report */
189 dev->part_id = part_id;
190
191 dev_info(&client->dev,
192 "found a 'Silicon Labs Si21%d-%c%c%c ROM 0x%02x'\n",
193 part_id, cmd.args[1], cmd.args[3], cmd.args[4], rom_id);
194
195 if (fw_name)
196 ret = si2157_load_firmware(fe, fw_name);
197 else
198 ret = -ENOENT;
199
200 /* Try alternate name, if any */
201 if (ret == -ENOENT && fw_alt_name)
202 ret = si2157_load_firmware(fe, fw_alt_name);
203
204 if (ret == -ENOENT) {
205 if (!required) {
206 dev_info(&client->dev, "Using ROM firmware.\n");
207 return 0;
208 }
209 dev_err(&client->dev, "Can't continue without a firmware.\n");
210 } else if (ret < 0) {
211 dev_err(&client->dev, "error %d when loading firmware\n", ret);
212 }
213 return ret;
214 }
215
si2157_init(struct dvb_frontend * fe)216 static int si2157_init(struct dvb_frontend *fe)
217 {
218 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
219 struct i2c_client *client = fe->tuner_priv;
220 struct si2157_dev *dev = i2c_get_clientdata(client);
221 unsigned int xtal_trim;
222 struct si2157_cmd cmd;
223 int ret;
224
225 dev_dbg(&client->dev, "\n");
226
227 /* Try to get Xtal trim property, to verify tuner still running */
228 memcpy(cmd.args, "\x15\x00\x02\x04", 4);
229 cmd.wlen = 4;
230 cmd.rlen = 4;
231 ret = si2157_cmd_execute(client, &cmd);
232
233 xtal_trim = cmd.args[2] | (cmd.args[3] << 8);
234
235 if (ret == 0 && xtal_trim < 16)
236 goto warm;
237
238 dev->if_frequency = 0; /* we no longer know current tuner state */
239
240 /* power up */
241 if (dev->part_id == SI2146) {
242 /* clock_mode = XTAL, clock_freq = 24MHz */
243 memcpy(cmd.args, "\xc0\x05\x01\x00\x00\x0b\x00\x00\x01", 9);
244 cmd.wlen = 9;
245 } else if (dev->part_id == SI2141) {
246 /* clock_mode: XTAL, xout enabled */
247 memcpy(cmd.args, "\xc0\x00\x0d\x0e\x00\x01\x01\x01\x01\x03", 10);
248 cmd.wlen = 10;
249 } else {
250 memcpy(cmd.args, "\xc0\x00\x0c\x00\x00\x01\x01\x01\x01\x01\x01\x02\x00\x00\x01", 15);
251 cmd.wlen = 15;
252 }
253 cmd.rlen = 1;
254 ret = si2157_cmd_execute(client, &cmd);
255 if (ret && (dev->part_id != SI2141 || ret != -EAGAIN))
256 goto err;
257
258 /* Si2141 needs a wake up command */
259 if (dev->part_id == SI2141) {
260 memcpy(cmd.args, "\xc0\x08\x01\x02\x00\x00\x01", 7);
261 cmd.wlen = 7;
262 ret = si2157_cmd_execute(client, &cmd);
263 if (ret)
264 goto err;
265 }
266
267 /* Try to load the firmware */
268 ret = si2157_find_and_load_firmware(fe);
269 if (ret < 0)
270 goto err;
271
272 /* reboot the tuner with new firmware? */
273 memcpy(cmd.args, "\x01\x01", 2);
274 cmd.wlen = 2;
275 cmd.rlen = 1;
276 ret = si2157_cmd_execute(client, &cmd);
277 if (ret)
278 goto err;
279
280 /* query firmware version */
281 memcpy(cmd.args, "\x11", 1);
282 cmd.wlen = 1;
283 cmd.rlen = 10;
284 ret = si2157_cmd_execute(client, &cmd);
285 if (ret)
286 goto err;
287
288 dev_info(&client->dev, "firmware version: %c.%c.%d\n",
289 cmd.args[6], cmd.args[7], cmd.args[8]);
290
291 /* enable tuner status flags */
292 memcpy(cmd.args, "\x14\x00\x01\x05\x01\x00", 6);
293 cmd.wlen = 6;
294 cmd.rlen = 1;
295 ret = si2157_cmd_execute(client, &cmd);
296 if (ret)
297 goto err;
298
299 memcpy(cmd.args, "\x14\x00\x01\x06\x01\x00", 6);
300 cmd.wlen = 6;
301 cmd.rlen = 1;
302 ret = si2157_cmd_execute(client, &cmd);
303 if (ret)
304 goto err;
305
306 memcpy(cmd.args, "\x14\x00\x01\x07\x01\x00", 6);
307 cmd.wlen = 6;
308 cmd.rlen = 1;
309 ret = si2157_cmd_execute(client, &cmd);
310 if (ret)
311 goto err;
312 warm:
313 /* init statistics in order signal app which are supported */
314 c->strength.len = 1;
315 c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
316 /* start statistics polling */
317 schedule_delayed_work(&dev->stat_work, msecs_to_jiffies(1000));
318
319 dev->active = true;
320 return 0;
321
322 err:
323 dev_dbg(&client->dev, "failed=%d\n", ret);
324 return ret;
325 }
326
si2157_sleep(struct dvb_frontend * fe)327 static int si2157_sleep(struct dvb_frontend *fe)
328 {
329 struct i2c_client *client = fe->tuner_priv;
330 struct si2157_dev *dev = i2c_get_clientdata(client);
331 int ret;
332 struct si2157_cmd cmd;
333
334 dev_dbg(&client->dev, "\n");
335
336 dev->active = false;
337
338 /* stop statistics polling */
339 cancel_delayed_work_sync(&dev->stat_work);
340
341 /* standby */
342 memcpy(cmd.args, "\x16\x00", 2);
343 cmd.wlen = 2;
344 cmd.rlen = 1;
345 ret = si2157_cmd_execute(client, &cmd);
346 if (ret)
347 goto err;
348
349 return 0;
350 err:
351 dev_dbg(&client->dev, "failed=%d\n", ret);
352 return ret;
353 }
354
si2157_tune_wait(struct i2c_client * client,u8 is_digital)355 static int si2157_tune_wait(struct i2c_client *client, u8 is_digital)
356 {
357 #define TUN_TIMEOUT 40
358 #define DIG_TIMEOUT 30
359 #define ANALOG_TIMEOUT 150
360 struct si2157_dev *dev = i2c_get_clientdata(client);
361 int ret;
362 unsigned long timeout;
363 unsigned long start_time;
364 u8 wait_status;
365 u8 tune_lock_mask;
366
367 if (is_digital)
368 tune_lock_mask = 0x04;
369 else
370 tune_lock_mask = 0x02;
371
372 mutex_lock(&dev->i2c_mutex);
373
374 /* wait tuner command complete */
375 start_time = jiffies;
376 timeout = start_time + msecs_to_jiffies(TUN_TIMEOUT);
377 while (1) {
378 ret = i2c_master_recv(client, &wait_status,
379 sizeof(wait_status));
380 if (ret < 0) {
381 goto err_mutex_unlock;
382 } else if (ret != sizeof(wait_status)) {
383 ret = -EREMOTEIO;
384 goto err_mutex_unlock;
385 }
386
387 if (time_after(jiffies, timeout))
388 break;
389
390 /* tuner done? */
391 if ((wait_status & 0x81) == 0x81)
392 break;
393 usleep_range(5000, 10000);
394 }
395
396 dev_dbg(&client->dev, "tuning took %d ms, status=0x%x\n",
397 jiffies_to_msecs(jiffies) - jiffies_to_msecs(start_time),
398 wait_status);
399
400 /* if we tuned ok, wait a bit for tuner lock */
401 if (tuner_lock_debug && (wait_status & 0x81) == 0x81) {
402 if (is_digital)
403 timeout = jiffies + msecs_to_jiffies(DIG_TIMEOUT);
404 else
405 timeout = jiffies + msecs_to_jiffies(ANALOG_TIMEOUT);
406
407 while (!time_after(jiffies, timeout)) {
408 ret = i2c_master_recv(client, &wait_status,
409 sizeof(wait_status));
410 if (ret < 0) {
411 goto err_mutex_unlock;
412 } else if (ret != sizeof(wait_status)) {
413 ret = -EREMOTEIO;
414 goto err_mutex_unlock;
415 }
416
417 /* tuner locked? */
418 if (wait_status & tune_lock_mask)
419 break;
420 usleep_range(5000, 10000);
421 }
422
423 dev_dbg(&client->dev, "tuning+lock took %d ms, status=0x%x\n",
424 jiffies_to_msecs(jiffies) - jiffies_to_msecs(start_time),
425 wait_status);
426 }
427
428 if ((wait_status & 0xc0) != 0x80) {
429 ret = -ETIMEDOUT;
430 goto err_mutex_unlock;
431 }
432
433 mutex_unlock(&dev->i2c_mutex);
434 return 0;
435
436 err_mutex_unlock:
437 mutex_unlock(&dev->i2c_mutex);
438 dev_err(&client->dev, "failed=%d\n", ret);
439 return ret;
440 }
441
si2157_set_params(struct dvb_frontend * fe)442 static int si2157_set_params(struct dvb_frontend *fe)
443 {
444 struct i2c_client *client = fe->tuner_priv;
445 struct si2157_dev *dev = i2c_get_clientdata(client);
446 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
447 int ret;
448 struct si2157_cmd cmd;
449 u8 bw, delivery_system;
450 u32 bandwidth;
451 u32 if_frequency = 5000000;
452
453 dev_dbg(&client->dev,
454 "delivery_system=%d frequency=%u bandwidth_hz=%u\n",
455 c->delivery_system, c->frequency, c->bandwidth_hz);
456
457 if (!dev->active) {
458 ret = -EAGAIN;
459 goto err;
460 }
461
462 if (SUPPORTS_1700KHz(dev) && c->bandwidth_hz <= 1700000) {
463 bandwidth = 1700000;
464 bw = 9;
465 } else if (c->bandwidth_hz <= 6000000) {
466 bandwidth = 6000000;
467 bw = 6;
468 } else if (SUPPORTS_1700KHz(dev) && c->bandwidth_hz <= 6100000) {
469 bandwidth = 6100000;
470 bw = 10;
471 } else if (c->bandwidth_hz <= 7000000) {
472 bandwidth = 7000000;
473 bw = 7;
474 } else {
475 bandwidth = 8000000;
476 bw = 8;
477 }
478
479 switch (c->delivery_system) {
480 case SYS_ATSC:
481 delivery_system = 0x00;
482 if_frequency = 3250000;
483 break;
484 case SYS_DVBC_ANNEX_B:
485 delivery_system = 0x10;
486 if_frequency = 4000000;
487 break;
488 case SYS_DVBT:
489 case SYS_DVBT2: /* it seems DVB-T and DVB-T2 both are 0x20 here */
490 delivery_system = 0x20;
491 break;
492 case SYS_DVBC_ANNEX_A:
493 case SYS_DVBC_ANNEX_C:
494 delivery_system = 0x30;
495 break;
496 case SYS_ISDBT:
497 delivery_system = 0x40;
498 break;
499 case SYS_DTMB:
500 delivery_system = 0x60;
501 break;
502 default:
503 ret = -EINVAL;
504 goto err;
505 }
506
507 memcpy(cmd.args, "\x14\x00\x03\x07\x00\x00", 6);
508 cmd.args[4] = delivery_system | bw;
509 if (dev->inversion)
510 cmd.args[5] = 0x01;
511 cmd.wlen = 6;
512 cmd.rlen = 4;
513 ret = si2157_cmd_execute(client, &cmd);
514 if (ret)
515 goto err;
516
517 /* On SI2146, set DTV AGC source to DLIF_AGC_3DB */
518 if (dev->part_id == SI2146)
519 memcpy(cmd.args, "\x14\x00\x02\x07\x00\x01", 6);
520 else
521 memcpy(cmd.args, "\x14\x00\x02\x07\x00\x00", 6);
522 cmd.args[4] = dev->if_port;
523 cmd.wlen = 6;
524 cmd.rlen = 4;
525 ret = si2157_cmd_execute(client, &cmd);
526 if (ret)
527 goto err;
528
529 /* set digital if frequency if needed */
530 if (if_frequency != dev->if_frequency) {
531 memcpy(cmd.args, "\x14\x00\x06\x07", 4);
532 cmd.args[4] = (if_frequency / 1000) & 0xff;
533 cmd.args[5] = ((if_frequency / 1000) >> 8) & 0xff;
534 cmd.wlen = 6;
535 cmd.rlen = 4;
536 ret = si2157_cmd_execute(client, &cmd);
537 if (ret)
538 goto err;
539
540 dev->if_frequency = if_frequency;
541 }
542
543 /* set digital frequency */
544 memcpy(cmd.args, "\x41\x00\x00\x00\x00\x00\x00\x00", 8);
545 cmd.args[4] = (c->frequency >> 0) & 0xff;
546 cmd.args[5] = (c->frequency >> 8) & 0xff;
547 cmd.args[6] = (c->frequency >> 16) & 0xff;
548 cmd.args[7] = (c->frequency >> 24) & 0xff;
549 cmd.wlen = 8;
550 cmd.rlen = 1;
551 ret = si2157_cmd_execute(client, &cmd);
552 if (ret)
553 goto err;
554
555 dev->bandwidth = bandwidth;
556 dev->frequency = c->frequency;
557
558 si2157_tune_wait(client, 1); /* wait to complete, ignore any errors */
559
560 return 0;
561 err:
562 dev->bandwidth = 0;
563 dev->frequency = 0;
564 dev->if_frequency = 0;
565 dev_dbg(&client->dev, "failed=%d\n", ret);
566 return ret;
567 }
568
si2157_set_analog_params(struct dvb_frontend * fe,struct analog_parameters * params)569 static int si2157_set_analog_params(struct dvb_frontend *fe,
570 struct analog_parameters *params)
571 {
572 struct i2c_client *client = fe->tuner_priv;
573 struct si2157_dev *dev = i2c_get_clientdata(client);
574 char *std; /* for debugging */
575 int ret;
576 struct si2157_cmd cmd;
577 u32 bandwidth = 0;
578 u32 if_frequency = 0;
579 u32 freq = 0;
580 u64 tmp_lval = 0;
581 u8 system = 0;
582 u8 color = 0; /* 0=NTSC/PAL, 0x10=SECAM */
583 u8 invert_analog = 1; /* analog tuner spectrum; 0=normal, 1=inverted */
584
585 if (!SUPPORTS_ATV_IF(dev)) {
586 dev_info(&client->dev, "Analog tuning not supported yet for Si21%d\n",
587 dev->part_id);
588 ret = -EINVAL;
589 goto err;
590 }
591
592 if (!dev->active)
593 si2157_init(fe);
594
595 if (!dev->active) {
596 ret = -EAGAIN;
597 goto err;
598 }
599 if (params->mode == V4L2_TUNER_RADIO) {
600 /*
601 * std = "fm";
602 * bandwidth = 1700000; //best can do for FM, AGC will be a mess though
603 * if_frequency = 1250000; //HVR-225x(saa7164), HVR-12xx(cx23885)
604 * if_frequency = 6600000; //HVR-9xx(cx231xx)
605 * if_frequency = 5500000; //HVR-19xx(pvrusb2)
606 */
607 dev_err(&client->dev, "si2157 does not currently support FM radio\n");
608 ret = -EINVAL;
609 goto err;
610 }
611 tmp_lval = params->frequency * 625LL;
612 do_div(tmp_lval, 10); /* convert to HZ */
613 freq = (u32)tmp_lval;
614
615 if (freq < 1000000) /* is freq in KHz */
616 freq = freq * 1000;
617 dev->frequency = freq;
618
619 /* if_frequency values based on tda187271C2 */
620 if (params->std & (V4L2_STD_B | V4L2_STD_GH)) {
621 if (freq >= 470000000) {
622 std = "palGH";
623 bandwidth = 8000000;
624 if_frequency = 6000000;
625 system = 1;
626 if (params->std &
627 (V4L2_STD_SECAM_G | V4L2_STD_SECAM_H)) {
628 std = "secamGH";
629 color = 0x10;
630 }
631 } else {
632 std = "palB";
633 bandwidth = 7000000;
634 if_frequency = 6000000;
635 system = 0;
636 if (params->std & V4L2_STD_SECAM_B) {
637 std = "secamB";
638 color = 0x10;
639 }
640 }
641 } else if (params->std & V4L2_STD_MN) {
642 std = "MN";
643 bandwidth = 6000000;
644 if_frequency = 5400000;
645 system = 2;
646 } else if (params->std & V4L2_STD_PAL_I) {
647 std = "palI";
648 bandwidth = 8000000;
649 if_frequency = 7250000; /* TODO: does not work yet */
650 system = 4;
651 } else if (params->std & V4L2_STD_DK) {
652 std = "palDK";
653 bandwidth = 8000000;
654 if_frequency = 6900000; /* TODO: does not work yet */
655 system = 5;
656 if (params->std & V4L2_STD_SECAM_DK) {
657 std = "secamDK";
658 color = 0x10;
659 }
660 } else if (params->std & V4L2_STD_SECAM_L) {
661 std = "secamL";
662 bandwidth = 8000000;
663 if_frequency = 6750000; /* TODO: untested */
664 system = 6;
665 color = 0x10;
666 } else if (params->std & V4L2_STD_SECAM_LC) {
667 std = "secamL'";
668 bandwidth = 7000000;
669 if_frequency = 1250000; /* TODO: untested */
670 system = 7;
671 color = 0x10;
672 } else {
673 std = "unknown";
674 }
675 /* calc channel center freq */
676 freq = freq - 1250000 + (bandwidth / 2);
677
678 dev_dbg(&client->dev,
679 "mode=%d system=%u std='%s' params->frequency=%u center freq=%u if=%u bandwidth=%u\n",
680 params->mode, system, std, params->frequency,
681 freq, if_frequency, bandwidth);
682
683 /* set analog IF port */
684 memcpy(cmd.args, "\x14\x00\x03\x06\x08\x02", 6);
685 /* in using dev->if_port, we assume analog and digital IF's */
686 /* are always on different ports */
687 /* assumes if_port definition is 0 or 1 for digital out */
688 cmd.args[4] = (dev->if_port == 1) ? 8 : 10;
689 /* Analog AGC assumed external */
690 cmd.args[5] = (dev->if_port == 1) ? 2 : 1;
691 cmd.wlen = 6;
692 cmd.rlen = 4;
693 ret = si2157_cmd_execute(client, &cmd);
694 if (ret)
695 goto err;
696
697 /* set analog IF output config */
698 memcpy(cmd.args, "\x14\x00\x0d\x06\x94\x64", 6);
699 cmd.wlen = 6;
700 cmd.rlen = 4;
701 ret = si2157_cmd_execute(client, &cmd);
702 if (ret)
703 goto err;
704
705 /* make this distinct from a digital IF */
706 dev->if_frequency = if_frequency | 1;
707
708 /* calc and set tuner analog if center frequency */
709 if_frequency = if_frequency + 1250000 - (bandwidth / 2);
710 dev_dbg(&client->dev, "IF Ctr freq=%d\n", if_frequency);
711
712 memcpy(cmd.args, "\x14\x00\x0C\x06", 4);
713 cmd.args[4] = (if_frequency / 1000) & 0xff;
714 cmd.args[5] = ((if_frequency / 1000) >> 8) & 0xff;
715 cmd.wlen = 6;
716 cmd.rlen = 4;
717 ret = si2157_cmd_execute(client, &cmd);
718 if (ret)
719 goto err;
720
721 /* set analog AGC config */
722 memcpy(cmd.args, "\x14\x00\x07\x06\x32\xc8", 6);
723 cmd.wlen = 6;
724 cmd.rlen = 4;
725 ret = si2157_cmd_execute(client, &cmd);
726 if (ret)
727 goto err;
728
729 /* set analog video mode */
730 memcpy(cmd.args, "\x14\x00\x04\x06\x00\x00", 6);
731 cmd.args[4] = system | color;
732 /* can use dev->inversion if assumed applies to both digital/analog */
733 if (invert_analog)
734 cmd.args[5] |= 0x02;
735 cmd.wlen = 6;
736 cmd.rlen = 1;
737 ret = si2157_cmd_execute(client, &cmd);
738 if (ret)
739 goto err;
740
741 /* set analog frequency */
742 memcpy(cmd.args, "\x41\x01\x00\x00\x00\x00\x00\x00", 8);
743 cmd.args[4] = (freq >> 0) & 0xff;
744 cmd.args[5] = (freq >> 8) & 0xff;
745 cmd.args[6] = (freq >> 16) & 0xff;
746 cmd.args[7] = (freq >> 24) & 0xff;
747 cmd.wlen = 8;
748 cmd.rlen = 1;
749 ret = si2157_cmd_execute(client, &cmd);
750 if (ret)
751 goto err;
752
753 dev->bandwidth = bandwidth;
754
755 si2157_tune_wait(client, 0); /* wait to complete, ignore any errors */
756
757 return 0;
758 err:
759 dev->bandwidth = 0;
760 dev->frequency = 0;
761 dev->if_frequency = 0;
762 dev_dbg(&client->dev, "failed=%d\n", ret);
763 return ret;
764 }
765
si2157_get_frequency(struct dvb_frontend * fe,u32 * frequency)766 static int si2157_get_frequency(struct dvb_frontend *fe, u32 *frequency)
767 {
768 struct i2c_client *client = fe->tuner_priv;
769 struct si2157_dev *dev = i2c_get_clientdata(client);
770
771 *frequency = dev->frequency;
772 dev_dbg(&client->dev, "freq=%u\n", dev->frequency);
773 return 0;
774 }
775
si2157_get_bandwidth(struct dvb_frontend * fe,u32 * bandwidth)776 static int si2157_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth)
777 {
778 struct i2c_client *client = fe->tuner_priv;
779 struct si2157_dev *dev = i2c_get_clientdata(client);
780
781 *bandwidth = dev->bandwidth;
782 dev_dbg(&client->dev, "bandwidth=%u\n", dev->bandwidth);
783 return 0;
784 }
785
si2157_get_if_frequency(struct dvb_frontend * fe,u32 * frequency)786 static int si2157_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
787 {
788 struct i2c_client *client = fe->tuner_priv;
789 struct si2157_dev *dev = i2c_get_clientdata(client);
790
791 *frequency = dev->if_frequency & ~1; /* strip analog IF indicator bit */
792 dev_dbg(&client->dev, "if_frequency=%u\n", *frequency);
793 return 0;
794 }
795
si2157_get_rf_strength(struct dvb_frontend * fe,u16 * rssi)796 static int si2157_get_rf_strength(struct dvb_frontend *fe, u16 *rssi)
797 {
798 struct i2c_client *client = fe->tuner_priv;
799 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
800 struct si2157_cmd cmd;
801 int ret;
802 int strength;
803
804 dev_dbg(&client->dev, "\n");
805
806 memcpy(cmd.args, "\x42\x00", 2);
807 cmd.wlen = 2;
808 cmd.rlen = 12;
809 ret = si2157_cmd_execute(client, &cmd);
810 if (ret)
811 goto err;
812
813 c->strength.stat[0].scale = FE_SCALE_DECIBEL;
814 c->strength.stat[0].svalue = (s8)cmd.args[3] * 1000;
815
816 /* normalize values based on Silicon Labs reference
817 * add 100, then anything > 80 is 100% signal
818 */
819 strength = (s8)cmd.args[3] + 100;
820 strength = clamp_val(strength, 0, 80);
821 *rssi = (u16)(strength * 0xffff / 80);
822
823 dev_dbg(&client->dev, "strength=%d rssi=%u\n",
824 (s8)cmd.args[3], *rssi);
825
826 return 0;
827 err:
828 dev_dbg(&client->dev, "failed=%d\n", ret);
829 return ret;
830 }
831
832 static const struct dvb_tuner_ops si2157_ops = {
833 .info = {
834 .name = "Silicon Labs Si2141/Si2146/2147/2148/2157/2158",
835 .frequency_min_hz = 42 * MHz,
836 .frequency_max_hz = 870 * MHz,
837 },
838
839 .init = si2157_init,
840 .sleep = si2157_sleep,
841 .set_params = si2157_set_params,
842 .set_analog_params = si2157_set_analog_params,
843 .get_frequency = si2157_get_frequency,
844 .get_bandwidth = si2157_get_bandwidth,
845 .get_if_frequency = si2157_get_if_frequency,
846
847 .get_rf_strength = si2157_get_rf_strength,
848 };
849
si2157_stat_work(struct work_struct * work)850 static void si2157_stat_work(struct work_struct *work)
851 {
852 struct si2157_dev *dev = container_of(work, struct si2157_dev, stat_work.work);
853 struct dvb_frontend *fe = dev->fe;
854 struct i2c_client *client = fe->tuner_priv;
855 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
856 struct si2157_cmd cmd;
857 int ret;
858
859 dev_dbg(&client->dev, "\n");
860
861 memcpy(cmd.args, "\x42\x00", 2);
862 cmd.wlen = 2;
863 cmd.rlen = 12;
864 ret = si2157_cmd_execute(client, &cmd);
865 if (ret)
866 goto err;
867
868 c->strength.stat[0].scale = FE_SCALE_DECIBEL;
869 c->strength.stat[0].svalue = (s8) cmd.args[3] * 1000;
870
871 schedule_delayed_work(&dev->stat_work, msecs_to_jiffies(2000));
872 return;
873 err:
874 c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
875 dev_dbg(&client->dev, "failed=%d\n", ret);
876 }
877
si2157_probe(struct i2c_client * client)878 static int si2157_probe(struct i2c_client *client)
879 {
880 const struct i2c_device_id *id = i2c_client_get_device_id(client);
881 struct si2157_config *cfg = client->dev.platform_data;
882 struct dvb_frontend *fe = cfg->fe;
883 struct si2157_dev *dev;
884 struct si2157_cmd cmd;
885 int ret;
886
887 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
888 if (!dev) {
889 ret = -ENOMEM;
890 dev_err(&client->dev, "kzalloc() failed\n");
891 goto err;
892 }
893
894 i2c_set_clientdata(client, dev);
895 dev->fe = cfg->fe;
896 dev->inversion = cfg->inversion;
897 dev->dont_load_firmware = cfg->dont_load_firmware;
898 dev->if_port = cfg->if_port;
899 dev->part_id = (u8)id->driver_data;
900 dev->if_frequency = 5000000; /* default value of property 0x0706 */
901 mutex_init(&dev->i2c_mutex);
902 INIT_DELAYED_WORK(&dev->stat_work, si2157_stat_work);
903
904 /* check if the tuner is there */
905 cmd.wlen = 0;
906 cmd.rlen = 1;
907 ret = si2157_cmd_execute(client, &cmd);
908 if (ret && ret != -EAGAIN)
909 goto err_kfree;
910
911 memcpy(&fe->ops.tuner_ops, &si2157_ops, sizeof(struct dvb_tuner_ops));
912 fe->tuner_priv = client;
913
914 #ifdef CONFIG_MEDIA_CONTROLLER
915 if (cfg->mdev) {
916 dev->mdev = cfg->mdev;
917
918 dev->ent.name = KBUILD_MODNAME;
919 dev->ent.function = MEDIA_ENT_F_TUNER;
920
921 dev->pad[SI2157_PAD_RF_INPUT].flags = MEDIA_PAD_FL_SINK;
922 dev->pad[SI2157_PAD_RF_INPUT].sig_type = PAD_SIGNAL_ANALOG;
923 dev->pad[SI2157_PAD_VID_OUT].flags = MEDIA_PAD_FL_SOURCE;
924 dev->pad[SI2157_PAD_VID_OUT].sig_type = PAD_SIGNAL_ANALOG;
925 dev->pad[SI2157_PAD_AUD_OUT].flags = MEDIA_PAD_FL_SOURCE;
926 dev->pad[SI2157_PAD_AUD_OUT].sig_type = PAD_SIGNAL_AUDIO;
927
928 ret = media_entity_pads_init(&dev->ent, SI2157_NUM_PADS,
929 &dev->pad[0]);
930
931 if (ret)
932 goto err_kfree;
933
934 ret = media_device_register_entity(cfg->mdev, &dev->ent);
935 if (ret) {
936 media_entity_cleanup(&dev->ent);
937 goto err_kfree;
938 }
939 }
940 #endif
941
942 dev_info(&client->dev, "Silicon Labs Si21%d successfully attached\n",
943 dev->part_id);
944
945 return 0;
946
947 err_kfree:
948 kfree(dev);
949 err:
950 dev_dbg(&client->dev, "failed=%d\n", ret);
951 return ret;
952 }
953
si2157_remove(struct i2c_client * client)954 static void si2157_remove(struct i2c_client *client)
955 {
956 struct si2157_dev *dev = i2c_get_clientdata(client);
957 struct dvb_frontend *fe = dev->fe;
958
959 dev_dbg(&client->dev, "\n");
960
961 /* stop statistics polling */
962 cancel_delayed_work_sync(&dev->stat_work);
963
964 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
965 if (dev->mdev)
966 media_device_unregister_entity(&dev->ent);
967 #endif
968
969 memset(&fe->ops.tuner_ops, 0, sizeof(struct dvb_tuner_ops));
970 fe->tuner_priv = NULL;
971 kfree(dev);
972 }
973
974 /*
975 * The part_id used here will only be used on buggy devices that don't
976 * accept firmware uploads. Non-buggy devices should just use "si2157" for
977 * all SiLabs TER tuners, as the driver should auto-detect it.
978 */
979 static const struct i2c_device_id si2157_id_table[] = {
980 {"si2157", SI2157},
981 {"si2146", SI2146},
982 {"si2141", SI2141},
983 {"si2177", SI2177},
984 {}
985 };
986 MODULE_DEVICE_TABLE(i2c, si2157_id_table);
987
988 static struct i2c_driver si2157_driver = {
989 .driver = {
990 .name = "si2157",
991 .suppress_bind_attrs = true,
992 },
993 .probe = si2157_probe,
994 .remove = si2157_remove,
995 .id_table = si2157_id_table,
996 };
997
998 module_i2c_driver(si2157_driver);
999
1000 MODULE_DESCRIPTION("Silicon Labs Si2141/Si2146/2147/2148/2157/2158 silicon tuner driver");
1001 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
1002 MODULE_LICENSE("GPL");
1003 MODULE_FIRMWARE(SI2158_A20_FIRMWARE);
1004 MODULE_FIRMWARE(SI2141_A10_FIRMWARE);
1005 MODULE_FIRMWARE(SI2157_A30_FIRMWARE);
1006 MODULE_FIRMWARE(SI2141_60_FIRMWARE);
1007 MODULE_FIRMWARE(SI2141_61_FIRMWARE);
1008 MODULE_FIRMWARE(SI2146_11_FIRMWARE);
1009 MODULE_FIRMWARE(SI2147_50_FIRMWARE);
1010 MODULE_FIRMWARE(SI2148_32_FIRMWARE);
1011 MODULE_FIRMWARE(SI2148_33_FIRMWARE);
1012 MODULE_FIRMWARE(SI2157_50_FIRMWARE);
1013 MODULE_FIRMWARE(SI2158_50_FIRMWARE);
1014 MODULE_FIRMWARE(SI2158_51_FIRMWARE);
1015 MODULE_FIRMWARE(SI2177_50_FIRMWARE);
1016