2 * Silicon Labs Si2168 DVB-T/T2/C demodulator driver
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 "si2168_priv.h"
19 static const struct dvb_frontend_ops si2168_ops;
21 /* execute firmware command */
22 static int si2168_cmd_execute(struct si2168 *s, struct si2168_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, "%s: 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;
72 mutex_unlock(&s->i2c_mutex);
78 dev_dbg(&s->client->dev, "%s: failed=%d\n", __func__, ret);
82 static int si2168_read_status(struct dvb_frontend *fe, fe_status_t *status)
84 struct si2168 *s = fe->demodulator_priv;
85 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
87 struct si2168_cmd cmd;
96 switch (c->delivery_system) {
103 case SYS_DVBC_ANNEX_A:
120 ret = si2168_cmd_execute(s, &cmd);
125 * Possible values seen, in order from strong signal to weak:
126 * 16 0001 0110 full lock
127 * 1e 0001 1110 partial lock
128 * 1a 0001 1010 partial lock
129 * 18 0001 1000 no lock
132 * [b4] statistics ready? Set in a few secs after lock is gained.
135 switch ((cmd.args[2] >> 1) & 0x03) {
137 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER;
140 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_VITERBI |
141 FE_HAS_SYNC | FE_HAS_LOCK;
145 s->fe_status = *status;
147 dev_dbg(&s->client->dev, "%s: status=%02x args=%*ph\n",
148 __func__, *status, cmd.rlen, cmd.args);
152 dev_dbg(&s->client->dev, "%s: failed=%d\n", __func__, ret);
156 static int si2168_set_frontend(struct dvb_frontend *fe)
158 struct si2168 *s = fe->demodulator_priv;
159 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
161 struct si2168_cmd cmd;
162 u8 bandwidth, delivery_system;
164 dev_dbg(&s->client->dev,
165 "%s: delivery_system=%u modulation=%u frequency=%u bandwidth_hz=%u symbol_rate=%u inversion=%u\n",
166 __func__, c->delivery_system, c->modulation,
167 c->frequency, c->bandwidth_hz, c->symbol_rate,
175 switch (c->delivery_system) {
177 delivery_system = 0x20;
179 case SYS_DVBC_ANNEX_A:
180 delivery_system = 0x30;
183 delivery_system = 0x70;
190 if (c->bandwidth_hz <= 5000000)
192 else if (c->bandwidth_hz <= 6000000)
194 else if (c->bandwidth_hz <= 7000000)
196 else if (c->bandwidth_hz <= 8000000)
198 else if (c->bandwidth_hz <= 9000000)
200 else if (c->bandwidth_hz <= 10000000)
206 if (fe->ops.tuner_ops.set_params) {
207 ret = fe->ops.tuner_ops.set_params(fe);
212 memcpy(cmd.args, "\x88\x02\x02\x02\x02", 5);
215 ret = si2168_cmd_execute(s, &cmd);
219 /* that has no big effect */
220 if (c->delivery_system == SYS_DVBT)
221 memcpy(cmd.args, "\x89\x21\x06\x11\xff\x98", 6);
222 else if (c->delivery_system == SYS_DVBC_ANNEX_A)
223 memcpy(cmd.args, "\x89\x21\x06\x11\x89\xf0", 6);
224 else if (c->delivery_system == SYS_DVBT2)
225 memcpy(cmd.args, "\x89\x21\x06\x11\x89\x20", 6);
228 ret = si2168_cmd_execute(s, &cmd);
232 memcpy(cmd.args, "\x51\x03", 2);
235 ret = si2168_cmd_execute(s, &cmd);
239 memcpy(cmd.args, "\x12\x08\x04", 3);
242 ret = si2168_cmd_execute(s, &cmd);
246 memcpy(cmd.args, "\x14\x00\x01\x04\x00\x00", 6);
249 ret = si2168_cmd_execute(s, &cmd);
253 memcpy(cmd.args, "\x14\x00\x03\x10\x17\x00", 6);
256 ret = si2168_cmd_execute(s, &cmd);
260 memcpy(cmd.args, "\x14\x00\x02\x10\x15\x00", 6);
263 ret = si2168_cmd_execute(s, &cmd);
267 memcpy(cmd.args, "\x14\x00\x0c\x10\x12\x00", 6);
270 ret = si2168_cmd_execute(s, &cmd);
274 memcpy(cmd.args, "\x14\x00\x06\x10\x24\x00", 6);
277 ret = si2168_cmd_execute(s, &cmd);
281 memcpy(cmd.args, "\x14\x00\x0b\x10\x88\x13", 6);
284 ret = si2168_cmd_execute(s, &cmd);
288 memcpy(cmd.args, "\x14\x00\x07\x10\x00\x24", 6);
291 ret = si2168_cmd_execute(s, &cmd);
295 memcpy(cmd.args, "\x14\x00\x0a\x10\x00\x00", 6);
296 cmd.args[4] = delivery_system | bandwidth;
299 ret = si2168_cmd_execute(s, &cmd);
303 memcpy(cmd.args, "\x14\x00\x04\x10\x15\x00", 6);
306 ret = si2168_cmd_execute(s, &cmd);
310 memcpy(cmd.args, "\x14\x00\x05\x10\xa1\x00", 6);
313 ret = si2168_cmd_execute(s, &cmd);
317 memcpy(cmd.args, "\x14\x00\x0f\x10\x10\x00", 6);
320 ret = si2168_cmd_execute(s, &cmd);
324 memcpy(cmd.args, "\x14\x00\x0d\x10\xd0\x02", 6);
327 ret = si2168_cmd_execute(s, &cmd);
331 memcpy(cmd.args, "\x14\x00\x01\x10\x00\x00", 6);
334 ret = si2168_cmd_execute(s, &cmd);
338 memcpy(cmd.args, "\x14\x00\x09\x10\xe3\x18", 6);
341 ret = si2168_cmd_execute(s, &cmd);
345 memcpy(cmd.args, "\x14\x00\x08\x10\xd7\x15", 6);
348 ret = si2168_cmd_execute(s, &cmd);
352 memcpy(cmd.args, "\x14\x00\x04\x03\x00\x00", 6);
355 ret = si2168_cmd_execute(s, &cmd);
359 memcpy(cmd.args, "\x14\x00\x03\x03\x00\x00", 6);
362 ret = si2168_cmd_execute(s, &cmd);
366 memcpy(cmd.args, "\x14\x00\x08\x03\x00\x00", 6);
369 ret = si2168_cmd_execute(s, &cmd);
373 memcpy(cmd.args, "\x14\x00\x07\x03\x01\x02", 6);
376 ret = si2168_cmd_execute(s, &cmd);
380 memcpy(cmd.args, "\x14\x00\x06\x03\x00\x00", 6);
383 ret = si2168_cmd_execute(s, &cmd);
387 memcpy(cmd.args, "\x14\x00\x05\x03\x00\x00", 6);
390 ret = si2168_cmd_execute(s, &cmd);
394 memcpy(cmd.args, "\x14\x00\x01\x03\x0c\x40", 6);
397 ret = si2168_cmd_execute(s, &cmd);
401 memcpy(cmd.args, "\x14\x00\x01\x10\x16\x00", 6);
404 ret = si2168_cmd_execute(s, &cmd);
408 memcpy(cmd.args, "\x14\x00\x01\x12\x00\x00", 6);
411 ret = si2168_cmd_execute(s, &cmd);
418 ret = si2168_cmd_execute(s, &cmd);
422 s->delivery_system = c->delivery_system;
426 dev_dbg(&s->client->dev, "%s: failed=%d\n", __func__, ret);
430 static int si2168_init(struct dvb_frontend *fe)
432 struct si2168 *s = fe->demodulator_priv;
433 int ret, len, remaining;
434 const struct firmware *fw = NULL;
435 u8 *fw_file = SI2168_FIRMWARE;
436 const unsigned int i2c_wr_max = 8;
437 struct si2168_cmd cmd;
439 dev_dbg(&s->client->dev, "%s:\n", __func__);
444 ret = si2168_cmd_execute(s, &cmd);
463 ret = si2168_cmd_execute(s, &cmd);
477 ret = si2168_cmd_execute(s, &cmd);
484 ret = si2168_cmd_execute(s, &cmd);
488 /* cold state - try to download firmware */
489 dev_info(&s->client->dev, "%s: found a '%s' in cold state\n",
490 KBUILD_MODNAME, si2168_ops.info.name);
492 /* request the firmware, this will block and timeout */
493 ret = request_firmware(&fw, fw_file, &s->client->dev);
495 dev_err(&s->client->dev, "%s: firmare file '%s' not found\n",
496 KBUILD_MODNAME, fw_file);
500 dev_info(&s->client->dev, "%s: downloading firmware from file '%s'\n",
501 KBUILD_MODNAME, fw_file);
503 for (remaining = fw->size; remaining > 0; remaining -= i2c_wr_max) {
505 if (len > i2c_wr_max)
508 memcpy(cmd.args, &fw->data[fw->size - remaining], len);
511 ret = si2168_cmd_execute(s, &cmd);
513 dev_err(&s->client->dev,
514 "%s: firmware download failed=%d\n",
515 KBUILD_MODNAME, ret);
520 release_firmware(fw);
527 ret = si2168_cmd_execute(s, &cmd);
531 dev_info(&s->client->dev, "%s: found a '%s' in warm state\n",
532 KBUILD_MODNAME, si2168_ops.info.name);
539 release_firmware(fw);
541 dev_dbg(&s->client->dev, "%s: failed=%d\n", __func__, ret);
545 static int si2168_sleep(struct dvb_frontend *fe)
547 struct si2168 *s = fe->demodulator_priv;
549 dev_dbg(&s->client->dev, "%s:\n", __func__);
556 static int si2168_get_tune_settings(struct dvb_frontend *fe,
557 struct dvb_frontend_tune_settings *s)
559 s->min_delay_ms = 900;
566 * We must use unlocked i2c_transfer() here because I2C lock is already taken
569 static int si2168_select(struct i2c_adapter *adap, void *mux_priv, u32 chan)
571 struct si2168 *s = mux_priv;
573 struct i2c_msg gate_open_msg = {
574 .addr = s->client->addr,
577 .buf = "\xc0\x0d\x01",
580 mutex_lock(&s->i2c_mutex);
582 /* open tuner I2C gate */
583 ret = __i2c_transfer(s->client->adapter, &gate_open_msg, 1);
585 dev_warn(&s->client->dev, "%s: i2c write failed=%d\n",
586 KBUILD_MODNAME, ret);
596 static int si2168_deselect(struct i2c_adapter *adap, void *mux_priv, u32 chan)
598 struct si2168 *s = mux_priv;
600 struct i2c_msg gate_close_msg = {
601 .addr = s->client->addr,
604 .buf = "\xc0\x0d\x00",
607 /* close tuner I2C gate */
608 ret = __i2c_transfer(s->client->adapter, &gate_close_msg, 1);
610 dev_warn(&s->client->dev, "%s: i2c write failed=%d\n",
611 KBUILD_MODNAME, ret);
618 mutex_unlock(&s->i2c_mutex);
623 static const struct dvb_frontend_ops si2168_ops = {
624 .delsys = {SYS_DVBT, SYS_DVBT2, SYS_DVBC_ANNEX_A},
626 .name = "Silicon Labs Si2168",
627 .caps = FE_CAN_FEC_1_2 |
640 FE_CAN_TRANSMISSION_MODE_AUTO |
641 FE_CAN_GUARD_INTERVAL_AUTO |
642 FE_CAN_HIERARCHY_AUTO |
647 .get_tune_settings = si2168_get_tune_settings,
650 .sleep = si2168_sleep,
652 .set_frontend = si2168_set_frontend,
654 .read_status = si2168_read_status,
657 static int si2168_probe(struct i2c_client *client,
658 const struct i2c_device_id *id)
660 struct si2168_config *config = client->dev.platform_data;
663 struct si2168_cmd cmd;
665 dev_dbg(&client->dev, "%s:\n", __func__);
667 s = kzalloc(sizeof(struct si2168), GFP_KERNEL);
670 dev_err(&client->dev, "%s: kzalloc() failed\n", KBUILD_MODNAME);
675 mutex_init(&s->i2c_mutex);
677 /* check if the demod is there */
680 ret = si2168_cmd_execute(s, &cmd);
684 /* create mux i2c adapter for tuner */
685 s->adapter = i2c_add_mux_adapter(client->adapter, &client->dev, s,
686 0, 0, 0, si2168_select, si2168_deselect);
687 if (s->adapter == NULL)
690 /* create dvb_frontend */
691 memcpy(&s->fe.ops, &si2168_ops, sizeof(struct dvb_frontend_ops));
692 s->fe.demodulator_priv = s;
694 *config->i2c_adapter = s->adapter;
695 *config->fe = &s->fe;
697 i2c_set_clientdata(client, s);
699 dev_info(&s->client->dev,
700 "%s: Silicon Labs Si2168 successfully attached\n",
705 dev_dbg(&client->dev, "%s: failed=%d\n", __func__, ret);
709 static int si2168_remove(struct i2c_client *client)
711 struct si2168 *s = i2c_get_clientdata(client);
713 dev_dbg(&client->dev, "%s:\n", __func__);
715 i2c_del_mux_adapter(s->adapter);
717 s->fe.ops.release = NULL;
718 s->fe.demodulator_priv = NULL;
725 static const struct i2c_device_id si2168_id[] = {
729 MODULE_DEVICE_TABLE(i2c, si2168_id);
731 static struct i2c_driver si2168_driver = {
733 .owner = THIS_MODULE,
736 .probe = si2168_probe,
737 .remove = si2168_remove,
738 .id_table = si2168_id,
741 module_i2c_driver(si2168_driver);
744 MODULE_DESCRIPTION("Silicon Labs Si2168 DVB-T/T2/C demodulator driver");
745 MODULE_LICENSE("GPL");
746 MODULE_FIRMWARE(SI2168_FIRMWARE);