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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 chip_id;
88
89 dev_dbg(&client->dev, "\n");
90
91 if (dev->fw_loaded)
92 goto warm;
93
94
95 if (dev->chiptype == SI2157_CHIPTYPE_SI2146) {
96 memcpy(cmd.args, "\xc0\x05\x01\x00\x00\x0b\x00\x00\x01", 9);
97 cmd.wlen = 9;
98 } else {
99 memcpy(cmd.args, "\xc0\x00\x0c\x00\x00\x01\x01\x01\x01\x01\x01\x02\x00\x00\x01", 15);
100 cmd.wlen = 15;
101 }
102 cmd.rlen = 1;
103 ret = si2157_cmd_execute(client, &cmd);
104 if (ret)
105 goto err;
106
107
108 memcpy(cmd.args, "\x02", 1);
109 cmd.wlen = 1;
110 cmd.rlen = 13;
111 ret = si2157_cmd_execute(client, &cmd);
112 if (ret)
113 goto err;
114
115 chip_id = cmd.args[1] << 24 | cmd.args[2] << 16 | cmd.args[3] << 8 |
116 cmd.args[4] << 0;
117
118 #define SI2158_A20 ('A' << 24 | 58 << 16 | '2' << 8 | '0' << 0)
119 #define SI2148_A20 ('A' << 24 | 48 << 16 | '2' << 8 | '0' << 0)
120 #define SI2157_A30 ('A' << 24 | 57 << 16 | '3' << 8 | '0' << 0)
121 #define SI2147_A30 ('A' << 24 | 47 << 16 | '3' << 8 | '0' << 0)
122 #define SI2146_A10 ('A' << 24 | 46 << 16 | '1' << 8 | '0' << 0)
123
124 switch (chip_id) {
125 case SI2158_A20:
126 case SI2148_A20:
127 fw_name = SI2158_A20_FIRMWARE;
128 break;
129 case SI2157_A30:
130 case SI2147_A30:
131 case SI2146_A10:
132 fw_name = NULL;
133 break;
134 default:
135 dev_err(&client->dev, "unknown chip version Si21%d-%c%c%c\n",
136 cmd.args[2], cmd.args[1],
137 cmd.args[3], cmd.args[4]);
138 ret = -EINVAL;
139 goto err;
140 }
141
142 dev_info(&client->dev, "found a 'Silicon Labs Si21%d-%c%c%c'\n",
143 cmd.args[2], cmd.args[1], cmd.args[3], cmd.args[4]);
144
145 if (fw_name == NULL)
146 goto skip_fw_download;
147
148
149 ret = request_firmware(&fw, fw_name, &client->dev);
150 if (ret) {
151 dev_err(&client->dev, "firmware file '%s' not found\n",
152 fw_name);
153 goto err;
154 }
155
156
157 if (fw->size % 17 != 0) {
158 dev_err(&client->dev, "firmware file '%s' is invalid\n",
159 fw_name);
160 ret = -EINVAL;
161 goto err_release_firmware;
162 }
163
164 dev_info(&client->dev, "downloading firmware from file '%s'\n",
165 fw_name);
166
167 for (remaining = fw->size; remaining > 0; remaining -= 17) {
168 len = fw->data[fw->size - remaining];
169 if (len > SI2157_ARGLEN) {
170 dev_err(&client->dev, "Bad firmware length\n");
171 goto err_release_firmware;
172 }
173 memcpy(cmd.args, &fw->data[(fw->size - remaining) + 1], len);
174 cmd.wlen = len;
175 cmd.rlen = 1;
176 ret = si2157_cmd_execute(client, &cmd);
177 if (ret) {
178 dev_err(&client->dev, "firmware download failed %d\n",
179 ret);
180 goto err_release_firmware;
181 }
182 }
183
184 release_firmware(fw);
185
186skip_fw_download:
187
188 memcpy(cmd.args, "\x01\x01", 2);
189 cmd.wlen = 2;
190 cmd.rlen = 1;
191 ret = si2157_cmd_execute(client, &cmd);
192 if (ret)
193 goto err;
194
195
196 memcpy(cmd.args, "\x11", 1);
197 cmd.wlen = 1;
198 cmd.rlen = 10;
199 ret = si2157_cmd_execute(client, &cmd);
200 if (ret)
201 goto err;
202
203 dev_info(&client->dev, "firmware version: %c.%c.%d\n",
204 cmd.args[6], cmd.args[7], cmd.args[8]);
205
206 dev->fw_loaded = true;
207
208warm:
209
210 c->strength.len = 1;
211 c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
212
213 schedule_delayed_work(&dev->stat_work, msecs_to_jiffies(1000));
214
215 dev->active = true;
216 return 0;
217err_release_firmware:
218 release_firmware(fw);
219err:
220 dev_dbg(&client->dev, "failed=%d\n", ret);
221 return ret;
222}
223
224static int si2157_sleep(struct dvb_frontend *fe)
225{
226 struct i2c_client *client = fe->tuner_priv;
227 struct si2157_dev *dev = i2c_get_clientdata(client);
228 int ret;
229 struct si2157_cmd cmd;
230
231 dev_dbg(&client->dev, "\n");
232
233 dev->active = false;
234
235
236 cancel_delayed_work_sync(&dev->stat_work);
237
238
239 memcpy(cmd.args, "\x16\x00", 2);
240 cmd.wlen = 2;
241 cmd.rlen = 1;
242 ret = si2157_cmd_execute(client, &cmd);
243 if (ret)
244 goto err;
245
246 return 0;
247err:
248 dev_dbg(&client->dev, "failed=%d\n", ret);
249 return ret;
250}
251
252static int si2157_set_params(struct dvb_frontend *fe)
253{
254 struct i2c_client *client = fe->tuner_priv;
255 struct si2157_dev *dev = i2c_get_clientdata(client);
256 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
257 int ret;
258 struct si2157_cmd cmd;
259 u8 bandwidth, delivery_system;
260 u32 if_frequency = 5000000;
261
262 dev_dbg(&client->dev,
263 "delivery_system=%d frequency=%u bandwidth_hz=%u\n",
264 c->delivery_system, c->frequency, c->bandwidth_hz);
265
266 if (!dev->active) {
267 ret = -EAGAIN;
268 goto err;
269 }
270
271 if (c->bandwidth_hz <= 6000000)
272 bandwidth = 0x06;
273 else if (c->bandwidth_hz <= 7000000)
274 bandwidth = 0x07;
275 else if (c->bandwidth_hz <= 8000000)
276 bandwidth = 0x08;
277 else
278 bandwidth = 0x0f;
279
280 switch (c->delivery_system) {
281 case SYS_ATSC:
282 delivery_system = 0x00;
283 if_frequency = 3250000;
284 break;
285 case SYS_DVBC_ANNEX_B:
286 delivery_system = 0x10;
287 if_frequency = 4000000;
288 break;
289 case SYS_DVBT:
290 case SYS_DVBT2:
291 delivery_system = 0x20;
292 break;
293 case SYS_DVBC_ANNEX_A:
294 delivery_system = 0x30;
295 break;
296 default:
297 ret = -EINVAL;
298 goto err;
299 }
300
301 memcpy(cmd.args, "\x14\x00\x03\x07\x00\x00", 6);
302 cmd.args[4] = delivery_system | bandwidth;
303 if (dev->inversion)
304 cmd.args[5] = 0x01;
305 cmd.wlen = 6;
306 cmd.rlen = 4;
307 ret = si2157_cmd_execute(client, &cmd);
308 if (ret)
309 goto err;
310
311 if (dev->chiptype == SI2157_CHIPTYPE_SI2146)
312 memcpy(cmd.args, "\x14\x00\x02\x07\x00\x01", 6);
313 else
314 memcpy(cmd.args, "\x14\x00\x02\x07\x00\x00", 6);
315 cmd.args[4] = dev->if_port;
316 cmd.wlen = 6;
317 cmd.rlen = 4;
318 ret = si2157_cmd_execute(client, &cmd);
319 if (ret)
320 goto err;
321
322
323 if (if_frequency != dev->if_frequency) {
324 memcpy(cmd.args, "\x14\x00\x06\x07", 4);
325 cmd.args[4] = (if_frequency / 1000) & 0xff;
326 cmd.args[5] = ((if_frequency / 1000) >> 8) & 0xff;
327 cmd.wlen = 6;
328 cmd.rlen = 4;
329 ret = si2157_cmd_execute(client, &cmd);
330 if (ret)
331 goto err;
332
333 dev->if_frequency = if_frequency;
334 }
335
336
337 memcpy(cmd.args, "\x41\x00\x00\x00\x00\x00\x00\x00", 8);
338 cmd.args[4] = (c->frequency >> 0) & 0xff;
339 cmd.args[5] = (c->frequency >> 8) & 0xff;
340 cmd.args[6] = (c->frequency >> 16) & 0xff;
341 cmd.args[7] = (c->frequency >> 24) & 0xff;
342 cmd.wlen = 8;
343 cmd.rlen = 1;
344 ret = si2157_cmd_execute(client, &cmd);
345 if (ret)
346 goto err;
347
348 return 0;
349err:
350 dev_dbg(&client->dev, "failed=%d\n", ret);
351 return ret;
352}
353
354static int si2157_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
355{
356 struct i2c_client *client = fe->tuner_priv;
357 struct si2157_dev *dev = i2c_get_clientdata(client);
358
359 *frequency = dev->if_frequency;
360 return 0;
361}
362
363static const struct dvb_tuner_ops si2157_ops = {
364 .info = {
365 .name = "Silicon Labs Si2146/2147/2148/2157/2158",
366 .frequency_min = 55000000,
367 .frequency_max = 862000000,
368 },
369
370 .init = si2157_init,
371 .sleep = si2157_sleep,
372 .set_params = si2157_set_params,
373 .get_if_frequency = si2157_get_if_frequency,
374};
375
376static void si2157_stat_work(struct work_struct *work)
377{
378 struct si2157_dev *dev = container_of(work, struct si2157_dev, stat_work.work);
379 struct dvb_frontend *fe = dev->fe;
380 struct i2c_client *client = fe->tuner_priv;
381 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
382 struct si2157_cmd cmd;
383 int ret;
384
385 dev_dbg(&client->dev, "\n");
386
387 memcpy(cmd.args, "\x42\x00", 2);
388 cmd.wlen = 2;
389 cmd.rlen = 12;
390 ret = si2157_cmd_execute(client, &cmd);
391 if (ret)
392 goto err;
393
394 c->strength.stat[0].scale = FE_SCALE_DECIBEL;
395 c->strength.stat[0].svalue = (s8) cmd.args[3] * 1000;
396
397 schedule_delayed_work(&dev->stat_work, msecs_to_jiffies(2000));
398 return;
399err:
400 c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
401 dev_dbg(&client->dev, "failed=%d\n", ret);
402}
403
404static int si2157_probe(struct i2c_client *client,
405 const struct i2c_device_id *id)
406{
407 struct si2157_config *cfg = client->dev.platform_data;
408 struct dvb_frontend *fe = cfg->fe;
409 struct si2157_dev *dev;
410 struct si2157_cmd cmd;
411 int ret;
412
413 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
414 if (!dev) {
415 ret = -ENOMEM;
416 dev_err(&client->dev, "kzalloc() failed\n");
417 goto err;
418 }
419
420 i2c_set_clientdata(client, dev);
421 dev->fe = cfg->fe;
422 dev->inversion = cfg->inversion;
423 dev->if_port = cfg->if_port;
424 dev->fw_loaded = false;
425 dev->chiptype = (u8)id->driver_data;
426 dev->if_frequency = 5000000;
427 mutex_init(&dev->i2c_mutex);
428 INIT_DELAYED_WORK(&dev->stat_work, si2157_stat_work);
429
430
431 cmd.wlen = 0;
432 cmd.rlen = 1;
433 ret = si2157_cmd_execute(client, &cmd);
434 if (ret)
435 goto err_kfree;
436
437 memcpy(&fe->ops.tuner_ops, &si2157_ops, sizeof(struct dvb_tuner_ops));
438 fe->tuner_priv = client;
439
440 dev_info(&client->dev, "Silicon Labs %s successfully attached\n",
441 dev->chiptype == SI2157_CHIPTYPE_SI2146 ?
442 "Si2146" : "Si2147/2148/2157/2158");
443
444 return 0;
445
446err_kfree:
447 kfree(dev);
448err:
449 dev_dbg(&client->dev, "failed=%d\n", ret);
450 return ret;
451}
452
453static int si2157_remove(struct i2c_client *client)
454{
455 struct si2157_dev *dev = i2c_get_clientdata(client);
456 struct dvb_frontend *fe = dev->fe;
457
458 dev_dbg(&client->dev, "\n");
459
460 memset(&fe->ops.tuner_ops, 0, sizeof(struct dvb_tuner_ops));
461 fe->tuner_priv = NULL;
462 kfree(dev);
463
464 return 0;
465}
466
467static const struct i2c_device_id si2157_id_table[] = {
468 {"si2157", SI2157_CHIPTYPE_SI2157},
469 {"si2146", SI2157_CHIPTYPE_SI2146},
470 {}
471};
472MODULE_DEVICE_TABLE(i2c, si2157_id_table);
473
474static struct i2c_driver si2157_driver = {
475 .driver = {
476 .name = "si2157",
477 },
478 .probe = si2157_probe,
479 .remove = si2157_remove,
480 .id_table = si2157_id_table,
481};
482
483module_i2c_driver(si2157_driver);
484
485MODULE_DESCRIPTION("Silicon Labs Si2146/2147/2148/2157/2158 silicon tuner driver");
486MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
487MODULE_LICENSE("GPL");
488MODULE_FIRMWARE(SI2158_A20_FIRMWARE);
489
