2 * Silicon Labs Si2147/2157/2158 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 si2157 *s, struct si2157_cmd *cmd)
25 unsigned long timeout;
27 mutex_lock(&s->i2c_mutex);
30 /* write cmd and args for firmware */
31 ret = i2c_master_send(s->client, cmd->args, cmd->wlen);
33 goto err_mutex_unlock;
34 } else if (ret != cmd->wlen) {
36 goto err_mutex_unlock;
41 /* wait cmd execution terminate */
43 timeout = jiffies + msecs_to_jiffies(TIMEOUT);
44 while (!time_after(jiffies, timeout)) {
45 ret = i2c_master_recv(s->client, cmd->args, cmd->rlen);
47 goto err_mutex_unlock;
48 } else if (ret != cmd->rlen) {
50 goto err_mutex_unlock;
54 if ((cmd->args[0] >> 7) & 0x01)
58 dev_dbg(&s->client->dev, "cmd execution took %d ms\n",
59 jiffies_to_msecs(jiffies) -
60 (jiffies_to_msecs(timeout) - TIMEOUT));
62 if (!((cmd->args[0] >> 7) & 0x01)) {
64 goto err_mutex_unlock;
71 mutex_unlock(&s->i2c_mutex);
77 dev_dbg(&s->client->dev, "failed=%d\n", ret);
81 static int si2157_init(struct dvb_frontend *fe)
83 struct si2157 *s = fe->tuner_priv;
84 int ret, len, remaining;
85 struct si2157_cmd cmd;
86 const struct firmware *fw = NULL;
90 dev_dbg(&s->client->dev, "\n");
96 memcpy(cmd.args, "\xc0\x00\x0c\x00\x00\x01\x01\x01\x01\x01\x01\x02\x00\x00\x01", 15);
99 ret = si2157_cmd_execute(s, &cmd);
103 /* query chip revision */
104 memcpy(cmd.args, "\x02", 1);
107 ret = si2157_cmd_execute(s, &cmd);
111 chip_id = cmd.args[1] << 24 | cmd.args[2] << 16 | cmd.args[3] << 8 |
114 #define SI2158_A20 ('A' << 24 | 58 << 16 | '2' << 8 | '0' << 0)
115 #define SI2157_A30 ('A' << 24 | 57 << 16 | '3' << 8 | '0' << 0)
116 #define SI2147_A30 ('A' << 24 | 47 << 16 | '3' << 8 | '0' << 0)
120 fw_file = SI2158_A20_FIRMWARE;
124 goto skip_fw_download;
127 dev_err(&s->client->dev,
128 "unknown chip version Si21%d-%c%c%c\n",
129 cmd.args[2], cmd.args[1],
130 cmd.args[3], cmd.args[4]);
135 /* cold state - try to download firmware */
136 dev_info(&s->client->dev, "found a '%s' in cold state\n",
137 si2157_ops.info.name);
139 /* request the firmware, this will block and timeout */
140 ret = request_firmware(&fw, fw_file, &s->client->dev);
142 dev_err(&s->client->dev, "firmware file '%s' not found\n",
147 /* firmware should be n chunks of 17 bytes */
148 if (fw->size % 17 != 0) {
149 dev_err(&s->client->dev, "firmware file '%s' is invalid\n",
155 dev_info(&s->client->dev, "downloading firmware from file '%s'\n",
158 for (remaining = fw->size; remaining > 0; remaining -= 17) {
159 len = fw->data[fw->size - remaining];
160 memcpy(cmd.args, &fw->data[(fw->size - remaining) + 1], len);
163 ret = si2157_cmd_execute(s, &cmd);
165 dev_err(&s->client->dev,
166 "firmware download failed=%d\n",
172 release_firmware(fw);
176 /* reboot the tuner with new firmware? */
177 memcpy(cmd.args, "\x01\x01", 2);
180 ret = si2157_cmd_execute(s, &cmd);
192 release_firmware(fw);
194 dev_dbg(&s->client->dev, "failed=%d\n", ret);
198 static int si2157_sleep(struct dvb_frontend *fe)
200 struct si2157 *s = fe->tuner_priv;
202 struct si2157_cmd cmd;
204 dev_dbg(&s->client->dev, "\n");
209 memcpy(cmd.args, "\x16\x00", 2);
212 ret = si2157_cmd_execute(s, &cmd);
218 dev_dbg(&s->client->dev, "failed=%d\n", ret);
222 static int si2157_set_params(struct dvb_frontend *fe)
224 struct si2157 *s = fe->tuner_priv;
225 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
227 struct si2157_cmd cmd;
228 u8 bandwidth, delivery_system;
230 dev_dbg(&s->client->dev,
231 "delivery_system=%d frequency=%u bandwidth_hz=%u\n",
232 c->delivery_system, c->frequency,
240 if (c->bandwidth_hz <= 6000000)
242 else if (c->bandwidth_hz <= 7000000)
244 else if (c->bandwidth_hz <= 8000000)
249 switch (c->delivery_system) {
251 delivery_system = 0x00;
254 case SYS_DVBT2: /* it seems DVB-T and DVB-T2 both are 0x20 here */
255 delivery_system = 0x20;
257 case SYS_DVBC_ANNEX_A:
258 delivery_system = 0x30;
265 memcpy(cmd.args, "\x14\x00\x03\x07\x00\x00", 6);
266 cmd.args[4] = delivery_system | bandwidth;
271 ret = si2157_cmd_execute(s, &cmd);
275 memcpy(cmd.args, "\x14\x00\x02\x07\x01\x00", 6);
278 ret = si2157_cmd_execute(s, &cmd);
283 memcpy(cmd.args, "\x41\x00\x00\x00\x00\x00\x00\x00", 8);
284 cmd.args[4] = (c->frequency >> 0) & 0xff;
285 cmd.args[5] = (c->frequency >> 8) & 0xff;
286 cmd.args[6] = (c->frequency >> 16) & 0xff;
287 cmd.args[7] = (c->frequency >> 24) & 0xff;
290 ret = si2157_cmd_execute(s, &cmd);
296 dev_dbg(&s->client->dev, "failed=%d\n", ret);
300 static int si2157_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
302 *frequency = 5000000; /* default value of property 0x0706 */
306 static const struct dvb_tuner_ops si2157_ops = {
308 .name = "Silicon Labs Si2157/Si2158",
309 .frequency_min = 110000000,
310 .frequency_max = 862000000,
314 .sleep = si2157_sleep,
315 .set_params = si2157_set_params,
316 .get_if_frequency = si2157_get_if_frequency,
319 static int si2157_probe(struct i2c_client *client,
320 const struct i2c_device_id *id)
322 struct si2157_config *cfg = client->dev.platform_data;
323 struct dvb_frontend *fe = cfg->fe;
325 struct si2157_cmd cmd;
328 s = kzalloc(sizeof(struct si2157), GFP_KERNEL);
331 dev_err(&client->dev, "kzalloc() failed\n");
337 s->inversion = cfg->inversion;
338 s->fw_loaded = false;
339 mutex_init(&s->i2c_mutex);
341 /* check if the tuner is there */
344 ret = si2157_cmd_execute(s, &cmd);
349 memcpy(&fe->ops.tuner_ops, &si2157_ops,
350 sizeof(struct dvb_tuner_ops));
352 i2c_set_clientdata(client, s);
354 dev_info(&s->client->dev,
355 "Silicon Labs Si2157/Si2158 successfully attached\n");
358 dev_dbg(&client->dev, "failed=%d\n", ret);
364 static int si2157_remove(struct i2c_client *client)
366 struct si2157 *s = i2c_get_clientdata(client);
367 struct dvb_frontend *fe = s->fe;
369 dev_dbg(&client->dev, "\n");
371 memset(&fe->ops.tuner_ops, 0, sizeof(struct dvb_tuner_ops));
372 fe->tuner_priv = NULL;
378 static const struct i2c_device_id si2157_id[] = {
382 MODULE_DEVICE_TABLE(i2c, si2157_id);
384 static struct i2c_driver si2157_driver = {
386 .owner = THIS_MODULE,
389 .probe = si2157_probe,
390 .remove = si2157_remove,
391 .id_table = si2157_id,
394 module_i2c_driver(si2157_driver);
396 MODULE_DESCRIPTION("Silicon Labs Si2157/Si2158 silicon tuner driver");
397 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
398 MODULE_LICENSE("GPL");
399 MODULE_FIRMWARE(SI2158_A20_FIRMWARE);