This source file includes following definitions.
- si2157_cmd_execute
- si2157_init
- si2157_sleep
- si2157_set_params
- si2157_get_if_frequency
- si2157_stat_work
- si2157_probe
- si2157_remove
1
2
3
4
5
6
7
8 #include "si2157_priv.h"
9
10 static const struct dvb_tuner_ops si2157_ops;
11
12
13 static int si2157_cmd_execute(struct i2c_client *client, struct si2157_cmd *cmd)
14 {
15 struct si2157_dev *dev = i2c_get_clientdata(client);
16 int ret;
17 unsigned long timeout;
18
19 mutex_lock(&dev->i2c_mutex);
20
21 if (cmd->wlen) {
22
23 ret = i2c_master_send(client, cmd->args, cmd->wlen);
24 if (ret < 0) {
25 goto err_mutex_unlock;
26 } else if (ret != cmd->wlen) {
27 ret = -EREMOTEIO;
28 goto err_mutex_unlock;
29 }
30 }
31
32 if (cmd->rlen) {
33
34 #define TIMEOUT 80
35 timeout = jiffies + msecs_to_jiffies(TIMEOUT);
36 while (!time_after(jiffies, timeout)) {
37 ret = i2c_master_recv(client, cmd->args, cmd->rlen);
38 if (ret < 0) {
39 goto err_mutex_unlock;
40 } else if (ret != cmd->rlen) {
41 ret = -EREMOTEIO;
42 goto err_mutex_unlock;
43 }
44
45
46 if ((cmd->args[0] >> 7) & 0x01)
47 break;
48 }
49
50 dev_dbg(&client->dev, "cmd execution took %d ms\n",
51 jiffies_to_msecs(jiffies) -
52 (jiffies_to_msecs(timeout) - TIMEOUT));
53
54 if (!((cmd->args[0] >> 7) & 0x01)) {
55 ret = -ETIMEDOUT;
56 goto err_mutex_unlock;
57 }
58 }
59
60 mutex_unlock(&dev->i2c_mutex);
61 return 0;
62
63 err_mutex_unlock:
64 mutex_unlock(&dev->i2c_mutex);
65 dev_dbg(&client->dev, "failed=%d\n", ret);
66 return ret;
67 }
68
69 static int si2157_init(struct dvb_frontend *fe)
70 {
71 struct i2c_client *client = fe->tuner_priv;
72 struct si2157_dev *dev = i2c_get_clientdata(client);
73 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
74 int ret, len, remaining;
75 struct si2157_cmd cmd;
76 const struct firmware *fw;
77 const char *fw_name;
78 unsigned int uitmp, chip_id;
79
80 dev_dbg(&client->dev, "\n");
81
82
83 memcpy(cmd.args, "\x15\x00\x06\x07", 4);
84 cmd.wlen = 4;
85 cmd.rlen = 4;
86 ret = si2157_cmd_execute(client, &cmd);
87 if (ret)
88 goto err;
89
90 uitmp = cmd.args[2] << 0 | cmd.args[3] << 8;
91 dev_dbg(&client->dev, "if_frequency kHz=%u\n", uitmp);
92
93 if (uitmp == dev->if_frequency / 1000)
94 goto warm;
95
96
97 if (dev->chiptype == SI2157_CHIPTYPE_SI2146) {
98 memcpy(cmd.args, "\xc0\x05\x01\x00\x00\x0b\x00\x00\x01", 9);
99 cmd.wlen = 9;
100 } else if (dev->chiptype == SI2157_CHIPTYPE_SI2141) {
101 memcpy(cmd.args, "\xc0\x00\x0d\x0e\x00\x01\x01\x01\x01\x03", 10);
102 cmd.wlen = 10;
103 } else {
104 memcpy(cmd.args, "\xc0\x00\x0c\x00\x00\x01\x01\x01\x01\x01\x01\x02\x00\x00\x01", 15);
105 cmd.wlen = 15;
106 }
107 cmd.rlen = 1;
108 ret = si2157_cmd_execute(client, &cmd);
109 if (ret)
110 goto err;
111
112
113 if (dev->chiptype == SI2157_CHIPTYPE_SI2141) {
114 memcpy(cmd.args, "\xc0\x08\x01\x02\x00\x00\x01", 7);
115 cmd.wlen = 7;
116 ret = si2157_cmd_execute(client, &cmd);
117 if (ret)
118 goto err;
119 }
120
121
122 memcpy(cmd.args, "\x02", 1);
123 cmd.wlen = 1;
124 cmd.rlen = 13;
125 ret = si2157_cmd_execute(client, &cmd);
126 if (ret)
127 goto err;
128
129 chip_id = cmd.args[1] << 24 | cmd.args[2] << 16 | cmd.args[3] << 8 |
130 cmd.args[4] << 0;
131
132 #define SI2177_A30 ('A' << 24 | 77 << 16 | '3' << 8 | '0' << 0)
133 #define SI2158_A20 ('A' << 24 | 58 << 16 | '2' << 8 | '0' << 0)
134 #define SI2148_A20 ('A' << 24 | 48 << 16 | '2' << 8 | '0' << 0)
135 #define SI2157_A30 ('A' << 24 | 57 << 16 | '3' << 8 | '0' << 0)
136 #define SI2147_A30 ('A' << 24 | 47 << 16 | '3' << 8 | '0' << 0)
137 #define SI2146_A10 ('A' << 24 | 46 << 16 | '1' << 8 | '0' << 0)
138 #define SI2141_A10 ('A' << 24 | 41 << 16 | '1' << 8 | '0' << 0)
139
140 switch (chip_id) {
141 case SI2158_A20:
142 case SI2148_A20:
143 fw_name = SI2158_A20_FIRMWARE;
144 break;
145 case SI2141_A10:
146 fw_name = SI2141_A10_FIRMWARE;
147 break;
148 case SI2177_A30:
149 fw_name = SI2157_A30_FIRMWARE;
150 break;
151 case SI2157_A30:
152 case SI2147_A30:
153 case SI2146_A10:
154 fw_name = NULL;
155 break;
156 default:
157 dev_err(&client->dev, "unknown chip version Si21%d-%c%c%c\n",
158 cmd.args[2], cmd.args[1],
159 cmd.args[3], cmd.args[4]);
160 ret = -EINVAL;
161 goto err;
162 }
163
164 dev_info(&client->dev, "found a 'Silicon Labs Si21%d-%c%c%c'\n",
165 cmd.args[2], cmd.args[1], cmd.args[3], cmd.args[4]);
166
167 if (fw_name == NULL)
168 goto skip_fw_download;
169
170
171 ret = request_firmware(&fw, fw_name, &client->dev);
172 if (ret) {
173 dev_err(&client->dev, "firmware file '%s' not found\n",
174 fw_name);
175 goto err;
176 }
177
178
179 if (fw->size % 17 != 0) {
180 dev_err(&client->dev, "firmware file '%s' is invalid\n",
181 fw_name);
182 ret = -EINVAL;
183 goto err_release_firmware;
184 }
185
186 dev_info(&client->dev, "downloading firmware from file '%s'\n",
187 fw_name);
188
189 for (remaining = fw->size; remaining > 0; remaining -= 17) {
190 len = fw->data[fw->size - remaining];
191 if (len > SI2157_ARGLEN) {
192 dev_err(&client->dev, "Bad firmware length\n");
193 ret = -EINVAL;
194 goto err_release_firmware;
195 }
196 memcpy(cmd.args, &fw->data[(fw->size - remaining) + 1], len);
197 cmd.wlen = len;
198 cmd.rlen = 1;
199 ret = si2157_cmd_execute(client, &cmd);
200 if (ret) {
201 dev_err(&client->dev, "firmware download failed %d\n",
202 ret);
203 goto err_release_firmware;
204 }
205 }
206
207 release_firmware(fw);
208
209 skip_fw_download:
210
211 memcpy(cmd.args, "\x01\x01", 2);
212 cmd.wlen = 2;
213 cmd.rlen = 1;
214 ret = si2157_cmd_execute(client, &cmd);
215 if (ret)
216 goto err;
217
218
219 memcpy(cmd.args, "\x11", 1);
220 cmd.wlen = 1;
221 cmd.rlen = 10;
222 ret = si2157_cmd_execute(client, &cmd);
223 if (ret)
224 goto err;
225
226 dev_info(&client->dev, "firmware version: %c.%c.%d\n",
227 cmd.args[6], cmd.args[7], cmd.args[8]);
228 warm:
229
230 c->strength.len = 1;
231 c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
232
233 schedule_delayed_work(&dev->stat_work, msecs_to_jiffies(1000));
234
235 dev->active = true;
236 return 0;
237 err_release_firmware:
238 release_firmware(fw);
239 err:
240 dev_dbg(&client->dev, "failed=%d\n", ret);
241 return ret;
242 }
243
244 static int si2157_sleep(struct dvb_frontend *fe)
245 {
246 struct i2c_client *client = fe->tuner_priv;
247 struct si2157_dev *dev = i2c_get_clientdata(client);
248 int ret;
249 struct si2157_cmd cmd;
250
251 dev_dbg(&client->dev, "\n");
252
253 dev->active = false;
254
255
256 cancel_delayed_work_sync(&dev->stat_work);
257
258
259 memcpy(cmd.args, "\x16\x00", 2);
260 cmd.wlen = 2;
261 cmd.rlen = 1;
262 ret = si2157_cmd_execute(client, &cmd);
263 if (ret)
264 goto err;
265
266 return 0;
267 err:
268 dev_dbg(&client->dev, "failed=%d\n", ret);
269 return ret;
270 }
271
272 static int si2157_set_params(struct dvb_frontend *fe)
273 {
274 struct i2c_client *client = fe->tuner_priv;
275 struct si2157_dev *dev = i2c_get_clientdata(client);
276 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
277 int ret;
278 struct si2157_cmd cmd;
279 u8 bandwidth, delivery_system;
280 u32 if_frequency = 5000000;
281
282 dev_dbg(&client->dev,
283 "delivery_system=%d frequency=%u bandwidth_hz=%u\n",
284 c->delivery_system, c->frequency, c->bandwidth_hz);
285
286 if (!dev->active) {
287 ret = -EAGAIN;
288 goto err;
289 }
290
291 if (c->bandwidth_hz <= 6000000)
292 bandwidth = 0x06;
293 else if (c->bandwidth_hz <= 7000000)
294 bandwidth = 0x07;
295 else if (c->bandwidth_hz <= 8000000)
296 bandwidth = 0x08;
297 else
298 bandwidth = 0x0f;
299
300 switch (c->delivery_system) {
301 case SYS_ATSC:
302 delivery_system = 0x00;
303 if_frequency = 3250000;
304 break;
305 case SYS_DVBC_ANNEX_B:
306 delivery_system = 0x10;
307 if_frequency = 4000000;
308 break;
309 case SYS_DVBT:
310 case SYS_DVBT2:
311 delivery_system = 0x20;
312 break;
313 case SYS_DVBC_ANNEX_A:
314 delivery_system = 0x30;
315 break;
316 default:
317 ret = -EINVAL;
318 goto err;
319 }
320
321 memcpy(cmd.args, "\x14\x00\x03\x07\x00\x00", 6);
322 cmd.args[4] = delivery_system | bandwidth;
323 if (dev->inversion)
324 cmd.args[5] = 0x01;
325 cmd.wlen = 6;
326 cmd.rlen = 4;
327 ret = si2157_cmd_execute(client, &cmd);
328 if (ret)
329 goto err;
330
331 if (dev->chiptype == SI2157_CHIPTYPE_SI2146)
332 memcpy(cmd.args, "\x14\x00\x02\x07\x00\x01", 6);
333 else
334 memcpy(cmd.args, "\x14\x00\x02\x07\x00\x00", 6);
335 cmd.args[4] = dev->if_port;
336 cmd.wlen = 6;
337 cmd.rlen = 4;
338 ret = si2157_cmd_execute(client, &cmd);
339 if (ret)
340 goto err;
341
342
343 if (if_frequency != dev->if_frequency) {
344 memcpy(cmd.args, "\x14\x00\x06\x07", 4);
345 cmd.args[4] = (if_frequency / 1000) & 0xff;
346 cmd.args[5] = ((if_frequency / 1000) >> 8) & 0xff;
347 cmd.wlen = 6;
348 cmd.rlen = 4;
349 ret = si2157_cmd_execute(client, &cmd);
350 if (ret)
351 goto err;
352
353 dev->if_frequency = if_frequency;
354 }
355
356
357 memcpy(cmd.args, "\x41\x00\x00\x00\x00\x00\x00\x00", 8);
358 cmd.args[4] = (c->frequency >> 0) & 0xff;
359 cmd.args[5] = (c->frequency >> 8) & 0xff;
360 cmd.args[6] = (c->frequency >> 16) & 0xff;
361 cmd.args[7] = (c->frequency >> 24) & 0xff;
362 cmd.wlen = 8;
363 cmd.rlen = 1;
364 ret = si2157_cmd_execute(client, &cmd);
365 if (ret)
366 goto err;
367
368 return 0;
369 err:
370 dev_dbg(&client->dev, "failed=%d\n", ret);
371 return ret;
372 }
373
374 static int si2157_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
375 {
376 struct i2c_client *client = fe->tuner_priv;
377 struct si2157_dev *dev = i2c_get_clientdata(client);
378
379 *frequency = dev->if_frequency;
380 return 0;
381 }
382
383 static const struct dvb_tuner_ops si2157_ops = {
384 .info = {
385 .name = "Silicon Labs Si2141/Si2146/2147/2148/2157/2158",
386 .frequency_min_hz = 42 * MHz,
387 .frequency_max_hz = 870 * MHz,
388 },
389
390 .init = si2157_init,
391 .sleep = si2157_sleep,
392 .set_params = si2157_set_params,
393 .get_if_frequency = si2157_get_if_frequency,
394 };
395
396 static void si2157_stat_work(struct work_struct *work)
397 {
398 struct si2157_dev *dev = container_of(work, struct si2157_dev, stat_work.work);
399 struct dvb_frontend *fe = dev->fe;
400 struct i2c_client *client = fe->tuner_priv;
401 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
402 struct si2157_cmd cmd;
403 int ret;
404
405 dev_dbg(&client->dev, "\n");
406
407 memcpy(cmd.args, "\x42\x00", 2);
408 cmd.wlen = 2;
409 cmd.rlen = 12;
410 ret = si2157_cmd_execute(client, &cmd);
411 if (ret)
412 goto err;
413
414 c->strength.stat[0].scale = FE_SCALE_DECIBEL;
415 c->strength.stat[0].svalue = (s8) cmd.args[3] * 1000;
416
417 schedule_delayed_work(&dev->stat_work, msecs_to_jiffies(2000));
418 return;
419 err:
420 c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
421 dev_dbg(&client->dev, "failed=%d\n", ret);
422 }
423
424 static int si2157_probe(struct i2c_client *client,
425 const struct i2c_device_id *id)
426 {
427 struct si2157_config *cfg = client->dev.platform_data;
428 struct dvb_frontend *fe = cfg->fe;
429 struct si2157_dev *dev;
430 struct si2157_cmd cmd;
431 int ret;
432
433 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
434 if (!dev) {
435 ret = -ENOMEM;
436 dev_err(&client->dev, "kzalloc() failed\n");
437 goto err;
438 }
439
440 i2c_set_clientdata(client, dev);
441 dev->fe = cfg->fe;
442 dev->inversion = cfg->inversion;
443 dev->if_port = cfg->if_port;
444 dev->chiptype = (u8)id->driver_data;
445 dev->if_frequency = 5000000;
446 mutex_init(&dev->i2c_mutex);
447 INIT_DELAYED_WORK(&dev->stat_work, si2157_stat_work);
448
449
450 cmd.wlen = 0;
451 cmd.rlen = 1;
452 ret = si2157_cmd_execute(client, &cmd);
453 if (ret)
454 goto err_kfree;
455
456 memcpy(&fe->ops.tuner_ops, &si2157_ops, sizeof(struct dvb_tuner_ops));
457 fe->tuner_priv = client;
458
459 #ifdef CONFIG_MEDIA_CONTROLLER
460 if (cfg->mdev) {
461 dev->mdev = cfg->mdev;
462
463 dev->ent.name = KBUILD_MODNAME;
464 dev->ent.function = MEDIA_ENT_F_TUNER;
465
466 dev->pad[SI2157_PAD_RF_INPUT].flags = MEDIA_PAD_FL_SINK;
467 dev->pad[SI2157_PAD_RF_INPUT].sig_type = PAD_SIGNAL_ANALOG;
468 dev->pad[SI2157_PAD_VID_OUT].flags = MEDIA_PAD_FL_SOURCE;
469 dev->pad[SI2157_PAD_VID_OUT].sig_type = PAD_SIGNAL_ANALOG;
470 dev->pad[SI2157_PAD_AUD_OUT].flags = MEDIA_PAD_FL_SOURCE;
471 dev->pad[SI2157_PAD_AUD_OUT].sig_type = PAD_SIGNAL_AUDIO;
472
473 ret = media_entity_pads_init(&dev->ent, SI2157_NUM_PADS,
474 &dev->pad[0]);
475
476 if (ret)
477 goto err_kfree;
478
479 ret = media_device_register_entity(cfg->mdev, &dev->ent);
480 if (ret) {
481 media_entity_cleanup(&dev->ent);
482 goto err_kfree;
483 }
484 }
485 #endif
486
487 dev_info(&client->dev, "Silicon Labs %s successfully attached\n",
488 dev->chiptype == SI2157_CHIPTYPE_SI2141 ? "Si2141" :
489 dev->chiptype == SI2157_CHIPTYPE_SI2146 ?
490 "Si2146" : "Si2147/2148/2157/2158");
491
492 return 0;
493
494 err_kfree:
495 kfree(dev);
496 err:
497 dev_dbg(&client->dev, "failed=%d\n", ret);
498 return ret;
499 }
500
501 static int si2157_remove(struct i2c_client *client)
502 {
503 struct si2157_dev *dev = i2c_get_clientdata(client);
504 struct dvb_frontend *fe = dev->fe;
505
506 dev_dbg(&client->dev, "\n");
507
508
509 cancel_delayed_work_sync(&dev->stat_work);
510
511 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
512 if (dev->mdev)
513 media_device_unregister_entity(&dev->ent);
514 #endif
515
516 memset(&fe->ops.tuner_ops, 0, sizeof(struct dvb_tuner_ops));
517 fe->tuner_priv = NULL;
518 kfree(dev);
519
520 return 0;
521 }
522
523 static const struct i2c_device_id si2157_id_table[] = {
524 {"si2157", SI2157_CHIPTYPE_SI2157},
525 {"si2146", SI2157_CHIPTYPE_SI2146},
526 {"si2141", SI2157_CHIPTYPE_SI2141},
527 {"si2177", SI2157_CHIPTYPE_SI2177},
528 {}
529 };
530 MODULE_DEVICE_TABLE(i2c, si2157_id_table);
531
532 static struct i2c_driver si2157_driver = {
533 .driver = {
534 .name = "si2157",
535 .suppress_bind_attrs = true,
536 },
537 .probe = si2157_probe,
538 .remove = si2157_remove,
539 .id_table = si2157_id_table,
540 };
541
542 module_i2c_driver(si2157_driver);
543
544 MODULE_DESCRIPTION("Silicon Labs Si2141/Si2146/2147/2148/2157/2158 silicon tuner driver");
545 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
546 MODULE_LICENSE("GPL");
547 MODULE_FIRMWARE(SI2158_A20_FIRMWARE);
548 MODULE_FIRMWARE(SI2141_A10_FIRMWARE);
549 MODULE_FIRMWARE(SI2157_A30_FIRMWARE);