2 * Silicon Labs Si2146/2147/2148/2157/2158 silicon tuner driver
4 * Copyright (C) 2014 Antti Palosaari <crope@iki.fi>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
17 #include "si2157_priv.h"
19 static const struct dvb_tuner_ops si2157_ops;
21 /* execute firmware command */
22 static int si2157_cmd_execute(struct i2c_client *client, struct si2157_cmd *cmd)
24 struct si2157_dev *dev = i2c_get_clientdata(client);
26 unsigned long timeout;
28 mutex_lock(&dev->i2c_mutex);
31 /* write cmd and args for firmware */
32 ret = i2c_master_send(client, cmd->args, cmd->wlen);
34 goto err_mutex_unlock;
35 } else if (ret != cmd->wlen) {
37 goto err_mutex_unlock;
42 /* wait cmd execution terminate */
44 timeout = jiffies + msecs_to_jiffies(TIMEOUT);
45 while (!time_after(jiffies, timeout)) {
46 ret = i2c_master_recv(client, cmd->args, cmd->rlen);
48 goto err_mutex_unlock;
49 } else if (ret != cmd->rlen) {
51 goto err_mutex_unlock;
55 if ((cmd->args[0] >> 7) & 0x01)
59 dev_dbg(&client->dev, "cmd execution took %d ms\n",
60 jiffies_to_msecs(jiffies) -
61 (jiffies_to_msecs(timeout) - TIMEOUT));
63 if (!((cmd->args[0] >> 7) & 0x01)) {
65 goto err_mutex_unlock;
69 mutex_unlock(&dev->i2c_mutex);
73 mutex_unlock(&dev->i2c_mutex);
74 dev_dbg(&client->dev, "failed=%d\n", ret);
78 static int si2157_init(struct dvb_frontend *fe)
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;
89 dev_dbg(&client->dev, "\n");
95 if (dev->chiptype == SI2157_CHIPTYPE_SI2146) {
96 memcpy(cmd.args, "\xc0\x05\x01\x00\x00\x0b\x00\x00\x01", 9);
99 memcpy(cmd.args, "\xc0\x00\x0c\x00\x00\x01\x01\x01\x01\x01\x01\x02\x00\x00\x01", 15);
103 ret = si2157_cmd_execute(client, &cmd);
107 /* query chip revision */
108 memcpy(cmd.args, "\x02", 1);
111 ret = si2157_cmd_execute(client, &cmd);
115 chip_id = cmd.args[1] << 24 | cmd.args[2] << 16 | cmd.args[3] << 8 |
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)
127 fw_name = SI2158_A20_FIRMWARE;
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]);
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]);
146 goto skip_fw_download;
148 /* request the firmware, this will block and timeout */
149 ret = request_firmware(&fw, fw_name, &client->dev);
151 dev_err(&client->dev, "firmware file '%s' not found\n",
156 /* firmware should be n chunks of 17 bytes */
157 if (fw->size % 17 != 0) {
158 dev_err(&client->dev, "firmware file '%s' is invalid\n",
161 goto err_release_firmware;
164 dev_info(&client->dev, "downloading firmware from file '%s'\n",
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");
172 goto err_release_firmware;
174 memcpy(cmd.args, &fw->data[(fw->size - remaining) + 1], len);
177 ret = si2157_cmd_execute(client, &cmd);
179 dev_err(&client->dev, "firmware download failed %d\n",
181 goto err_release_firmware;
185 release_firmware(fw);
188 /* reboot the tuner with new firmware? */
189 memcpy(cmd.args, "\x01\x01", 2);
192 ret = si2157_cmd_execute(client, &cmd);
196 /* query firmware version */
197 memcpy(cmd.args, "\x11", 1);
200 ret = si2157_cmd_execute(client, &cmd);
204 dev_info(&client->dev, "firmware version: %c.%c.%d\n",
205 cmd.args[6], cmd.args[7], cmd.args[8]);
207 dev->fw_loaded = true;
210 /* init statistics in order signal app which are supported */
212 c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
213 /* start statistics polling */
214 schedule_delayed_work(&dev->stat_work, msecs_to_jiffies(1000));
218 err_release_firmware:
219 release_firmware(fw);
221 dev_dbg(&client->dev, "failed=%d\n", ret);
225 static int si2157_sleep(struct dvb_frontend *fe)
227 struct i2c_client *client = fe->tuner_priv;
228 struct si2157_dev *dev = i2c_get_clientdata(client);
230 struct si2157_cmd cmd;
232 dev_dbg(&client->dev, "\n");
236 /* stop statistics polling */
237 cancel_delayed_work_sync(&dev->stat_work);
240 memcpy(cmd.args, "\x16\x00", 2);
243 ret = si2157_cmd_execute(client, &cmd);
249 dev_dbg(&client->dev, "failed=%d\n", ret);
253 static int si2157_set_params(struct dvb_frontend *fe)
255 struct i2c_client *client = fe->tuner_priv;
256 struct si2157_dev *dev = i2c_get_clientdata(client);
257 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
259 struct si2157_cmd cmd;
260 u8 bandwidth, delivery_system;
261 u32 if_frequency = 5000000;
263 dev_dbg(&client->dev,
264 "delivery_system=%d frequency=%u bandwidth_hz=%u\n",
265 c->delivery_system, c->frequency, c->bandwidth_hz);
272 if (c->bandwidth_hz <= 6000000)
274 else if (c->bandwidth_hz <= 7000000)
276 else if (c->bandwidth_hz <= 8000000)
281 switch (c->delivery_system) {
283 delivery_system = 0x00;
284 if_frequency = 3250000;
286 case SYS_DVBC_ANNEX_B:
287 delivery_system = 0x10;
288 if_frequency = 4000000;
291 case SYS_DVBT2: /* it seems DVB-T and DVB-T2 both are 0x20 here */
292 delivery_system = 0x20;
294 case SYS_DVBC_ANNEX_A:
295 delivery_system = 0x30;
302 memcpy(cmd.args, "\x14\x00\x03\x07\x00\x00", 6);
303 cmd.args[4] = delivery_system | bandwidth;
308 ret = si2157_cmd_execute(client, &cmd);
312 if (dev->chiptype == SI2157_CHIPTYPE_SI2146)
313 memcpy(cmd.args, "\x14\x00\x02\x07\x00\x01", 6);
315 memcpy(cmd.args, "\x14\x00\x02\x07\x00\x00", 6);
316 cmd.args[4] = dev->if_port;
319 ret = si2157_cmd_execute(client, &cmd);
323 /* set if frequency if needed */
324 if (if_frequency != dev->if_frequency) {
325 memcpy(cmd.args, "\x14\x00\x06\x07", 4);
326 cmd.args[4] = (if_frequency / 1000) & 0xff;
327 cmd.args[5] = ((if_frequency / 1000) >> 8) & 0xff;
330 ret = si2157_cmd_execute(client, &cmd);
334 dev->if_frequency = if_frequency;
338 memcpy(cmd.args, "\x41\x00\x00\x00\x00\x00\x00\x00", 8);
339 cmd.args[4] = (c->frequency >> 0) & 0xff;
340 cmd.args[5] = (c->frequency >> 8) & 0xff;
341 cmd.args[6] = (c->frequency >> 16) & 0xff;
342 cmd.args[7] = (c->frequency >> 24) & 0xff;
345 ret = si2157_cmd_execute(client, &cmd);
351 dev_dbg(&client->dev, "failed=%d\n", ret);
355 static int si2157_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
357 struct i2c_client *client = fe->tuner_priv;
358 struct si2157_dev *dev = i2c_get_clientdata(client);
360 *frequency = dev->if_frequency;
364 static const struct dvb_tuner_ops si2157_ops = {
366 .name = "Silicon Labs Si2146/2147/2148/2157/2158",
367 .frequency_min = 42000000,
368 .frequency_max = 870000000,
372 .sleep = si2157_sleep,
373 .set_params = si2157_set_params,
374 .get_if_frequency = si2157_get_if_frequency,
377 static void si2157_stat_work(struct work_struct *work)
379 struct si2157_dev *dev = container_of(work, struct si2157_dev, stat_work.work);
380 struct dvb_frontend *fe = dev->fe;
381 struct i2c_client *client = fe->tuner_priv;
382 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
383 struct si2157_cmd cmd;
386 dev_dbg(&client->dev, "\n");
388 memcpy(cmd.args, "\x42\x00", 2);
391 ret = si2157_cmd_execute(client, &cmd);
395 c->strength.stat[0].scale = FE_SCALE_DECIBEL;
396 c->strength.stat[0].svalue = (s8) cmd.args[3] * 1000;
398 schedule_delayed_work(&dev->stat_work, msecs_to_jiffies(2000));
401 c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
402 dev_dbg(&client->dev, "failed=%d\n", ret);
405 static int si2157_probe(struct i2c_client *client,
406 const struct i2c_device_id *id)
408 struct si2157_config *cfg = client->dev.platform_data;
409 struct dvb_frontend *fe = cfg->fe;
410 struct si2157_dev *dev;
411 struct si2157_cmd cmd;
414 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
417 dev_err(&client->dev, "kzalloc() failed\n");
421 i2c_set_clientdata(client, dev);
423 dev->inversion = cfg->inversion;
424 dev->if_port = cfg->if_port;
425 dev->fw_loaded = false;
426 dev->chiptype = (u8)id->driver_data;
427 dev->if_frequency = 5000000; /* default value of property 0x0706 */
428 mutex_init(&dev->i2c_mutex);
429 INIT_DELAYED_WORK(&dev->stat_work, si2157_stat_work);
431 /* check if the tuner is there */
434 ret = si2157_cmd_execute(client, &cmd);
438 memcpy(&fe->ops.tuner_ops, &si2157_ops, sizeof(struct dvb_tuner_ops));
439 fe->tuner_priv = client;
441 #ifdef CONFIG_MEDIA_CONTROLLER
443 dev->mdev = cfg->mdev;
445 dev->ent.name = KBUILD_MODNAME;
446 dev->ent.function = MEDIA_ENT_F_TUNER;
448 dev->pad[TUNER_PAD_RF_INPUT].flags = MEDIA_PAD_FL_SINK;
449 dev->pad[TUNER_PAD_OUTPUT].flags = MEDIA_PAD_FL_SOURCE;
450 dev->pad[TUNER_PAD_AUD_OUT].flags = MEDIA_PAD_FL_SOURCE;
452 ret = media_entity_pads_init(&dev->ent, TUNER_NUM_PADS,
458 ret = media_device_register_entity(cfg->mdev, &dev->ent);
460 media_entity_cleanup(&dev->ent);
466 dev_info(&client->dev, "Silicon Labs %s successfully attached\n",
467 dev->chiptype == SI2157_CHIPTYPE_SI2146 ?
468 "Si2146" : "Si2147/2148/2157/2158");
475 dev_dbg(&client->dev, "failed=%d\n", ret);
479 static int si2157_remove(struct i2c_client *client)
481 struct si2157_dev *dev = i2c_get_clientdata(client);
482 struct dvb_frontend *fe = dev->fe;
484 dev_dbg(&client->dev, "\n");
486 /* stop statistics polling */
487 cancel_delayed_work_sync(&dev->stat_work);
489 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
491 media_device_unregister_entity(&dev->ent);
494 memset(&fe->ops.tuner_ops, 0, sizeof(struct dvb_tuner_ops));
495 fe->tuner_priv = NULL;
501 static const struct i2c_device_id si2157_id_table[] = {
502 {"si2157", SI2157_CHIPTYPE_SI2157},
503 {"si2146", SI2157_CHIPTYPE_SI2146},
506 MODULE_DEVICE_TABLE(i2c, si2157_id_table);
508 static struct i2c_driver si2157_driver = {
512 .probe = si2157_probe,
513 .remove = si2157_remove,
514 .id_table = si2157_id_table,
517 module_i2c_driver(si2157_driver);
519 MODULE_DESCRIPTION("Silicon Labs Si2146/2147/2148/2157/2158 silicon tuner driver");
520 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
521 MODULE_LICENSE("GPL");
522 MODULE_FIRMWARE(SI2158_A20_FIRMWARE);