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 int ret, len, remaining;
83 struct si2157_cmd cmd;
84 const struct firmware *fw;
88 dev_dbg(&client->dev, "\n");
94 if (dev->chiptype == SI2157_CHIPTYPE_SI2146) {
95 memcpy(cmd.args, "\xc0\x05\x01\x00\x00\x0b\x00\x00\x01", 9);
98 memcpy(cmd.args, "\xc0\x00\x0c\x00\x00\x01\x01\x01\x01\x01\x01\x02\x00\x00\x01", 15);
102 ret = si2157_cmd_execute(client, &cmd);
106 /* query chip revision */
107 memcpy(cmd.args, "\x02", 1);
110 ret = si2157_cmd_execute(client, &cmd);
114 chip_id = cmd.args[1] << 24 | cmd.args[2] << 16 | cmd.args[3] << 8 |
117 #define SI2158_A20 ('A' << 24 | 58 << 16 | '2' << 8 | '0' << 0)
118 #define SI2148_A20 ('A' << 24 | 48 << 16 | '2' << 8 | '0' << 0)
119 #define SI2157_A30 ('A' << 24 | 57 << 16 | '3' << 8 | '0' << 0)
120 #define SI2147_A30 ('A' << 24 | 47 << 16 | '3' << 8 | '0' << 0)
121 #define SI2146_A10 ('A' << 24 | 46 << 16 | '1' << 8 | '0' << 0)
126 fw_name = SI2158_A20_FIRMWARE;
134 dev_err(&client->dev, "unknown chip version Si21%d-%c%c%c\n",
135 cmd.args[2], cmd.args[1],
136 cmd.args[3], cmd.args[4]);
141 dev_info(&client->dev, "found a 'Silicon Labs Si21%d-%c%c%c'\n",
142 cmd.args[2], cmd.args[1], cmd.args[3], cmd.args[4]);
145 goto skip_fw_download;
147 /* request the firmware, this will block and timeout */
148 ret = request_firmware(&fw, fw_name, &client->dev);
150 dev_err(&client->dev, "firmware file '%s' not found\n",
155 /* firmware should be n chunks of 17 bytes */
156 if (fw->size % 17 != 0) {
157 dev_err(&client->dev, "firmware file '%s' is invalid\n",
160 goto err_release_firmware;
163 dev_info(&client->dev, "downloading firmware from file '%s'\n",
166 for (remaining = fw->size; remaining > 0; remaining -= 17) {
167 len = fw->data[fw->size - remaining];
168 memcpy(cmd.args, &fw->data[(fw->size - remaining) + 1], len);
171 ret = si2157_cmd_execute(client, &cmd);
173 dev_err(&client->dev, "firmware download failed %d\n",
175 goto err_release_firmware;
179 release_firmware(fw);
182 /* reboot the tuner with new firmware? */
183 memcpy(cmd.args, "\x01\x01", 2);
186 ret = si2157_cmd_execute(client, &cmd);
190 /* query firmware version */
191 memcpy(cmd.args, "\x11", 1);
194 ret = si2157_cmd_execute(client, &cmd);
198 dev_info(&client->dev, "firmware version: %c.%c.%d\n",
199 cmd.args[6], cmd.args[7], cmd.args[8]);
201 dev->fw_loaded = true;
207 err_release_firmware:
208 release_firmware(fw);
210 dev_dbg(&client->dev, "failed=%d\n", ret);
214 static int si2157_sleep(struct dvb_frontend *fe)
216 struct i2c_client *client = fe->tuner_priv;
217 struct si2157_dev *dev = i2c_get_clientdata(client);
219 struct si2157_cmd cmd;
221 dev_dbg(&client->dev, "\n");
226 memcpy(cmd.args, "\x16\x00", 2);
229 ret = si2157_cmd_execute(client, &cmd);
235 dev_dbg(&client->dev, "failed=%d\n", ret);
239 static int si2157_set_params(struct dvb_frontend *fe)
241 struct i2c_client *client = fe->tuner_priv;
242 struct si2157_dev *dev = i2c_get_clientdata(client);
243 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
245 struct si2157_cmd cmd;
246 u8 bandwidth, delivery_system;
248 dev_dbg(&client->dev,
249 "delivery_system=%d frequency=%u bandwidth_hz=%u\n",
250 c->delivery_system, c->frequency, c->bandwidth_hz);
257 if (c->bandwidth_hz <= 6000000)
259 else if (c->bandwidth_hz <= 7000000)
261 else if (c->bandwidth_hz <= 8000000)
266 switch (c->delivery_system) {
268 delivery_system = 0x00;
270 case SYS_DVBC_ANNEX_B:
271 delivery_system = 0x10;
274 case SYS_DVBT2: /* it seems DVB-T and DVB-T2 both are 0x20 here */
275 delivery_system = 0x20;
277 case SYS_DVBC_ANNEX_A:
278 delivery_system = 0x30;
285 memcpy(cmd.args, "\x14\x00\x03\x07\x00\x00", 6);
286 cmd.args[4] = delivery_system | bandwidth;
291 ret = si2157_cmd_execute(client, &cmd);
295 if (dev->chiptype == SI2157_CHIPTYPE_SI2146)
296 memcpy(cmd.args, "\x14\x00\x02\x07\x00\x01", 6);
298 memcpy(cmd.args, "\x14\x00\x02\x07\x01\x00", 6);
301 ret = si2157_cmd_execute(client, &cmd);
306 memcpy(cmd.args, "\x41\x00\x00\x00\x00\x00\x00\x00", 8);
307 cmd.args[4] = (c->frequency >> 0) & 0xff;
308 cmd.args[5] = (c->frequency >> 8) & 0xff;
309 cmd.args[6] = (c->frequency >> 16) & 0xff;
310 cmd.args[7] = (c->frequency >> 24) & 0xff;
313 ret = si2157_cmd_execute(client, &cmd);
319 dev_dbg(&client->dev, "failed=%d\n", ret);
323 static int si2157_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
325 *frequency = 5000000; /* default value of property 0x0706 */
329 static const struct dvb_tuner_ops si2157_ops = {
331 .name = "Silicon Labs Si2146/2147/2148/2157/2158",
332 .frequency_min = 110000000,
333 .frequency_max = 862000000,
337 .sleep = si2157_sleep,
338 .set_params = si2157_set_params,
339 .get_if_frequency = si2157_get_if_frequency,
342 static int si2157_probe(struct i2c_client *client,
343 const struct i2c_device_id *id)
345 struct si2157_config *cfg = client->dev.platform_data;
346 struct dvb_frontend *fe = cfg->fe;
347 struct si2157_dev *dev;
348 struct si2157_cmd cmd;
351 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
354 dev_err(&client->dev, "kzalloc() failed\n");
358 i2c_set_clientdata(client, dev);
360 dev->inversion = cfg->inversion;
361 dev->fw_loaded = false;
362 dev->chiptype = (u8)id->driver_data;
363 mutex_init(&dev->i2c_mutex);
365 /* check if the tuner is there */
368 ret = si2157_cmd_execute(client, &cmd);
372 memcpy(&fe->ops.tuner_ops, &si2157_ops, sizeof(struct dvb_tuner_ops));
373 fe->tuner_priv = client;
375 dev_info(&client->dev, "Silicon Labs %s successfully attached\n",
376 dev->chiptype == SI2157_CHIPTYPE_SI2146 ?
377 "Si2146" : "Si2147/2148/2157/2158");
384 dev_dbg(&client->dev, "failed=%d\n", ret);
388 static int si2157_remove(struct i2c_client *client)
390 struct si2157_dev *dev = i2c_get_clientdata(client);
391 struct dvb_frontend *fe = dev->fe;
393 dev_dbg(&client->dev, "\n");
395 memset(&fe->ops.tuner_ops, 0, sizeof(struct dvb_tuner_ops));
396 fe->tuner_priv = NULL;
402 static const struct i2c_device_id si2157_id_table[] = {
403 {"si2157", SI2157_CHIPTYPE_SI2157},
404 {"si2146", SI2157_CHIPTYPE_SI2146},
407 MODULE_DEVICE_TABLE(i2c, si2157_id_table);
409 static struct i2c_driver si2157_driver = {
411 .owner = THIS_MODULE,
414 .probe = si2157_probe,
415 .remove = si2157_remove,
416 .id_table = si2157_id_table,
419 module_i2c_driver(si2157_driver);
421 MODULE_DESCRIPTION("Silicon Labs Si2146/2147/2148/2157/2158 silicon tuner driver");
422 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
423 MODULE_LICENSE("GPL");
424 MODULE_FIRMWARE(SI2158_A20_FIRMWARE);