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17#include "si2157_priv.h"
18
19static const struct dvb_tuner_ops si2157_ops;
20
21
22static int si2157_cmd_execute(struct i2c_client *client, struct si2157_cmd *cmd)
23{
24 struct si2157_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 80
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 si2157_init(struct dvb_frontend *fe)
79{
80 struct i2c_client *client = fe->tuner_priv;
81 struct si2157_dev *dev = i2c_get_clientdata(client);
82 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
83 int ret, len, remaining;
84 struct si2157_cmd cmd;
85 const struct firmware *fw;
86 const char *fw_name;
87 unsigned int uitmp, chip_id;
88
89 dev_dbg(&client->dev, "\n");
90
91
92 memcpy(cmd.args, "\x15\x00\x06\x07", 4);
93 cmd.wlen = 4;
94 cmd.rlen = 4;
95 ret = si2157_cmd_execute(client, &cmd);
96 if (ret)
97 goto err;
98
99 uitmp = cmd.args[2] << 0 | cmd.args[3] << 8;
100 dev_dbg(&client->dev, "if_frequency kHz=%u\n", uitmp);
101
102 if (uitmp == dev->if_frequency / 1000)
103 goto warm;
104
105
106 if (dev->chiptype == SI2157_CHIPTYPE_SI2146) {
107 memcpy(cmd.args, "\xc0\x05\x01\x00\x00\x0b\x00\x00\x01", 9);
108 cmd.wlen = 9;
109 } else if (dev->chiptype == SI2157_CHIPTYPE_SI2141) {
110 memcpy(cmd.args, "\xc0\x00\x0d\x0e\x00\x01\x01\x01\x01\x03", 10);
111 cmd.wlen = 10;
112 } else {
113 memcpy(cmd.args, "\xc0\x00\x0c\x00\x00\x01\x01\x01\x01\x01\x01\x02\x00\x00\x01", 15);
114 cmd.wlen = 15;
115 }
116 cmd.rlen = 1;
117 ret = si2157_cmd_execute(client, &cmd);
118 if (ret)
119 goto err;
120
121
122 if (dev->chiptype == SI2157_CHIPTYPE_SI2141) {
123 memcpy(cmd.args, "\xc0\x08\x01\x02\x00\x00\x01", 7);
124 cmd.wlen = 7;
125 ret = si2157_cmd_execute(client, &cmd);
126 if (ret)
127 goto err;
128 }
129
130
131 memcpy(cmd.args, "\x02", 1);
132 cmd.wlen = 1;
133 cmd.rlen = 13;
134 ret = si2157_cmd_execute(client, &cmd);
135 if (ret)
136 goto err;
137
138 chip_id = cmd.args[1] << 24 | cmd.args[2] << 16 | cmd.args[3] << 8 |
139 cmd.args[4] << 0;
140
141 #define SI2158_A20 ('A' << 24 | 58 << 16 | '2' << 8 | '0' << 0)
142 #define SI2148_A20 ('A' << 24 | 48 << 16 | '2' << 8 | '0' << 0)
143 #define SI2157_A30 ('A' << 24 | 57 << 16 | '3' << 8 | '0' << 0)
144 #define SI2147_A30 ('A' << 24 | 47 << 16 | '3' << 8 | '0' << 0)
145 #define SI2146_A10 ('A' << 24 | 46 << 16 | '1' << 8 | '0' << 0)
146 #define SI2141_A10 ('A' << 24 | 41 << 16 | '1' << 8 | '0' << 0)
147
148 switch (chip_id) {
149 case SI2158_A20:
150 case SI2148_A20:
151 fw_name = SI2158_A20_FIRMWARE;
152 break;
153 case SI2141_A10:
154 fw_name = SI2141_A10_FIRMWARE;
155 break;
156 case SI2157_A30:
157 case SI2147_A30:
158 case SI2146_A10:
159 fw_name = NULL;
160 break;
161 default:
162 dev_err(&client->dev, "unknown chip version Si21%d-%c%c%c\n",
163 cmd.args[2], cmd.args[1],
164 cmd.args[3], cmd.args[4]);
165 ret = -EINVAL;
166 goto err;
167 }
168
169 dev_info(&client->dev, "found a 'Silicon Labs Si21%d-%c%c%c'\n",
170 cmd.args[2], cmd.args[1], cmd.args[3], cmd.args[4]);
171
172 if (fw_name == NULL)
173 goto skip_fw_download;
174
175
176 ret = request_firmware(&fw, fw_name, &client->dev);
177 if (ret) {
178 dev_err(&client->dev, "firmware file '%s' not found\n",
179 fw_name);
180 goto err;
181 }
182
183
184 if (fw->size % 17 != 0) {
185 dev_err(&client->dev, "firmware file '%s' is invalid\n",
186 fw_name);
187 ret = -EINVAL;
188 goto err_release_firmware;
189 }
190
191 dev_info(&client->dev, "downloading firmware from file '%s'\n",
192 fw_name);
193
194 for (remaining = fw->size; remaining > 0; remaining -= 17) {
195 len = fw->data[fw->size - remaining];
196 if (len > SI2157_ARGLEN) {
197 dev_err(&client->dev, "Bad firmware length\n");
198 ret = -EINVAL;
199 goto err_release_firmware;
200 }
201 memcpy(cmd.args, &fw->data[(fw->size - remaining) + 1], len);
202 cmd.wlen = len;
203 cmd.rlen = 1;
204 ret = si2157_cmd_execute(client, &cmd);
205 if (ret) {
206 dev_err(&client->dev, "firmware download failed %d\n",
207 ret);
208 goto err_release_firmware;
209 }
210 }
211
212 release_firmware(fw);
213
214skip_fw_download:
215
216 memcpy(cmd.args, "\x01\x01", 2);
217 cmd.wlen = 2;
218 cmd.rlen = 1;
219 ret = si2157_cmd_execute(client, &cmd);
220 if (ret)
221 goto err;
222
223
224 memcpy(cmd.args, "\x11", 1);
225 cmd.wlen = 1;
226 cmd.rlen = 10;
227 ret = si2157_cmd_execute(client, &cmd);
228 if (ret)
229 goto err;
230
231 dev_info(&client->dev, "firmware version: %c.%c.%d\n",
232 cmd.args[6], cmd.args[7], cmd.args[8]);
233warm:
234
235 c->strength.len = 1;
236 c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
237
238 schedule_delayed_work(&dev->stat_work, msecs_to_jiffies(1000));
239
240 dev->active = true;
241 return 0;
242err_release_firmware:
243 release_firmware(fw);
244err:
245 dev_dbg(&client->dev, "failed=%d\n", ret);
246 return ret;
247}
248
249static int si2157_sleep(struct dvb_frontend *fe)
250{
251 struct i2c_client *client = fe->tuner_priv;
252 struct si2157_dev *dev = i2c_get_clientdata(client);
253 int ret;
254 struct si2157_cmd cmd;
255
256 dev_dbg(&client->dev, "\n");
257
258 dev->active = false;
259
260
261 cancel_delayed_work_sync(&dev->stat_work);
262
263
264 memcpy(cmd.args, "\x16\x00", 2);
265 cmd.wlen = 2;
266 cmd.rlen = 1;
267 ret = si2157_cmd_execute(client, &cmd);
268 if (ret)
269 goto err;
270
271 return 0;
272err:
273 dev_dbg(&client->dev, "failed=%d\n", ret);
274 return ret;
275}
276
277static int si2157_set_params(struct dvb_frontend *fe)
278{
279 struct i2c_client *client = fe->tuner_priv;
280 struct si2157_dev *dev = i2c_get_clientdata(client);
281 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
282 int ret;
283 struct si2157_cmd cmd;
284 u8 bandwidth, delivery_system;
285 u32 if_frequency = 5000000;
286
287 dev_dbg(&client->dev,
288 "delivery_system=%d frequency=%u bandwidth_hz=%u\n",
289 c->delivery_system, c->frequency, c->bandwidth_hz);
290
291 if (!dev->active) {
292 ret = -EAGAIN;
293 goto err;
294 }
295
296 if (c->bandwidth_hz <= 6000000)
297 bandwidth = 0x06;
298 else if (c->bandwidth_hz <= 7000000)
299 bandwidth = 0x07;
300 else if (c->bandwidth_hz <= 8000000)
301 bandwidth = 0x08;
302 else
303 bandwidth = 0x0f;
304
305 switch (c->delivery_system) {
306 case SYS_ATSC:
307 delivery_system = 0x00;
308 if_frequency = 3250000;
309 break;
310 case SYS_DVBC_ANNEX_B:
311 delivery_system = 0x10;
312 if_frequency = 4000000;
313 break;
314 case SYS_DVBT:
315 case SYS_DVBT2:
316 delivery_system = 0x20;
317 break;
318 case SYS_DVBC_ANNEX_A:
319 delivery_system = 0x30;
320 break;
321 default:
322 ret = -EINVAL;
323 goto err;
324 }
325
326 memcpy(cmd.args, "\x14\x00\x03\x07\x00\x00", 6);
327 cmd.args[4] = delivery_system | bandwidth;
328 if (dev->inversion)
329 cmd.args[5] = 0x01;
330 cmd.wlen = 6;
331 cmd.rlen = 4;
332 ret = si2157_cmd_execute(client, &cmd);
333 if (ret)
334 goto err;
335
336 if (dev->chiptype == SI2157_CHIPTYPE_SI2146)
337 memcpy(cmd.args, "\x14\x00\x02\x07\x00\x01", 6);
338 else
339 memcpy(cmd.args, "\x14\x00\x02\x07\x00\x00", 6);
340 cmd.args[4] = dev->if_port;
341 cmd.wlen = 6;
342 cmd.rlen = 4;
343 ret = si2157_cmd_execute(client, &cmd);
344 if (ret)
345 goto err;
346
347
348 if (if_frequency != dev->if_frequency) {
349 memcpy(cmd.args, "\x14\x00\x06\x07", 4);
350 cmd.args[4] = (if_frequency / 1000) & 0xff;
351 cmd.args[5] = ((if_frequency / 1000) >> 8) & 0xff;
352 cmd.wlen = 6;
353 cmd.rlen = 4;
354 ret = si2157_cmd_execute(client, &cmd);
355 if (ret)
356 goto err;
357
358 dev->if_frequency = if_frequency;
359 }
360
361
362 memcpy(cmd.args, "\x41\x00\x00\x00\x00\x00\x00\x00", 8);
363 cmd.args[4] = (c->frequency >> 0) & 0xff;
364 cmd.args[5] = (c->frequency >> 8) & 0xff;
365 cmd.args[6] = (c->frequency >> 16) & 0xff;
366 cmd.args[7] = (c->frequency >> 24) & 0xff;
367 cmd.wlen = 8;
368 cmd.rlen = 1;
369 ret = si2157_cmd_execute(client, &cmd);
370 if (ret)
371 goto err;
372
373 return 0;
374err:
375 dev_dbg(&client->dev, "failed=%d\n", ret);
376 return ret;
377}
378
379static int si2157_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
380{
381 struct i2c_client *client = fe->tuner_priv;
382 struct si2157_dev *dev = i2c_get_clientdata(client);
383
384 *frequency = dev->if_frequency;
385 return 0;
386}
387
388static const struct dvb_tuner_ops si2157_ops = {
389 .info = {
390 .name = "Silicon Labs Si2141/Si2146/2147/2148/2157/2158",
391 .frequency_min = 42000000,
392 .frequency_max = 870000000,
393 },
394
395 .init = si2157_init,
396 .sleep = si2157_sleep,
397 .set_params = si2157_set_params,
398 .get_if_frequency = si2157_get_if_frequency,
399};
400
401static void si2157_stat_work(struct work_struct *work)
402{
403 struct si2157_dev *dev = container_of(work, struct si2157_dev, stat_work.work);
404 struct dvb_frontend *fe = dev->fe;
405 struct i2c_client *client = fe->tuner_priv;
406 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
407 struct si2157_cmd cmd;
408 int ret;
409
410 dev_dbg(&client->dev, "\n");
411
412 memcpy(cmd.args, "\x42\x00", 2);
413 cmd.wlen = 2;
414 cmd.rlen = 12;
415 ret = si2157_cmd_execute(client, &cmd);
416 if (ret)
417 goto err;
418
419 c->strength.stat[0].scale = FE_SCALE_DECIBEL;
420 c->strength.stat[0].svalue = (s8) cmd.args[3] * 1000;
421
422 schedule_delayed_work(&dev->stat_work, msecs_to_jiffies(2000));
423 return;
424err:
425 c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
426 dev_dbg(&client->dev, "failed=%d\n", ret);
427}
428
429static int si2157_probe(struct i2c_client *client,
430 const struct i2c_device_id *id)
431{
432 struct si2157_config *cfg = client->dev.platform_data;
433 struct dvb_frontend *fe = cfg->fe;
434 struct si2157_dev *dev;
435 struct si2157_cmd cmd;
436 int ret;
437
438 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
439 if (!dev) {
440 ret = -ENOMEM;
441 dev_err(&client->dev, "kzalloc() failed\n");
442 goto err;
443 }
444
445 i2c_set_clientdata(client, dev);
446 dev->fe = cfg->fe;
447 dev->inversion = cfg->inversion;
448 dev->if_port = cfg->if_port;
449 dev->chiptype = (u8)id->driver_data;
450 dev->if_frequency = 5000000;
451 mutex_init(&dev->i2c_mutex);
452 INIT_DELAYED_WORK(&dev->stat_work, si2157_stat_work);
453
454
455 cmd.wlen = 0;
456 cmd.rlen = 1;
457 ret = si2157_cmd_execute(client, &cmd);
458 if (ret)
459 goto err_kfree;
460
461 memcpy(&fe->ops.tuner_ops, &si2157_ops, sizeof(struct dvb_tuner_ops));
462 fe->tuner_priv = client;
463
464#ifdef CONFIG_MEDIA_CONTROLLER
465 if (cfg->mdev) {
466 dev->mdev = cfg->mdev;
467
468 dev->ent.name = KBUILD_MODNAME;
469 dev->ent.function = MEDIA_ENT_F_TUNER;
470
471 dev->pad[TUNER_PAD_RF_INPUT].flags = MEDIA_PAD_FL_SINK;
472 dev->pad[TUNER_PAD_OUTPUT].flags = MEDIA_PAD_FL_SOURCE;
473 dev->pad[TUNER_PAD_AUD_OUT].flags = MEDIA_PAD_FL_SOURCE;
474
475 ret = media_entity_pads_init(&dev->ent, TUNER_NUM_PADS,
476 &dev->pad[0]);
477
478 if (ret)
479 goto err_kfree;
480
481 ret = media_device_register_entity(cfg->mdev, &dev->ent);
482 if (ret) {
483 media_entity_cleanup(&dev->ent);
484 goto err_kfree;
485 }
486 }
487#endif
488
489 dev_info(&client->dev, "Silicon Labs %s successfully attached\n",
490 dev->chiptype == SI2157_CHIPTYPE_SI2141 ? "Si2141" :
491 dev->chiptype == SI2157_CHIPTYPE_SI2146 ?
492 "Si2146" : "Si2147/2148/2157/2158");
493
494 return 0;
495
496err_kfree:
497 kfree(dev);
498err:
499 dev_dbg(&client->dev, "failed=%d\n", ret);
500 return ret;
501}
502
503static int si2157_remove(struct i2c_client *client)
504{
505 struct si2157_dev *dev = i2c_get_clientdata(client);
506 struct dvb_frontend *fe = dev->fe;
507
508 dev_dbg(&client->dev, "\n");
509
510
511 cancel_delayed_work_sync(&dev->stat_work);
512
513#ifdef CONFIG_MEDIA_CONTROLLER_DVB
514 if (dev->mdev)
515 media_device_unregister_entity(&dev->ent);
516#endif
517
518 memset(&fe->ops.tuner_ops, 0, sizeof(struct dvb_tuner_ops));
519 fe->tuner_priv = NULL;
520 kfree(dev);
521
522 return 0;
523}
524
525static const struct i2c_device_id si2157_id_table[] = {
526 {"si2157", SI2157_CHIPTYPE_SI2157},
527 {"si2146", SI2157_CHIPTYPE_SI2146},
528 {"si2141", SI2157_CHIPTYPE_SI2141},
529 {}
530};
531MODULE_DEVICE_TABLE(i2c, si2157_id_table);
532
533static struct i2c_driver si2157_driver = {
534 .driver = {
535 .name = "si2157",
536 .suppress_bind_attrs = true,
537 },
538 .probe = si2157_probe,
539 .remove = si2157_remove,
540 .id_table = si2157_id_table,
541};
542
543module_i2c_driver(si2157_driver);
544
545MODULE_DESCRIPTION("Silicon Labs Si2141/Si2146/2147/2148/2157/2158 silicon tuner driver");
546MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
547MODULE_LICENSE("GPL");
548MODULE_FIRMWARE(SI2158_A20_FIRMWARE);
549MODULE_FIRMWARE(SI2141_A10_FIRMWARE);
550
