400 lines
8.6 KiB
C
400 lines
8.6 KiB
C
/*
|
|
* Silicon Labs Si2147/2157/2158 silicon tuner driver
|
|
*
|
|
* Copyright (C) 2014 Antti Palosaari <crope@iki.fi>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*/
|
|
|
|
#include "si2157_priv.h"
|
|
|
|
static const struct dvb_tuner_ops si2157_ops;
|
|
|
|
/* execute firmware command */
|
|
static int si2157_cmd_execute(struct si2157 *s, struct si2157_cmd *cmd)
|
|
{
|
|
int ret;
|
|
unsigned long timeout;
|
|
|
|
mutex_lock(&s->i2c_mutex);
|
|
|
|
if (cmd->wlen) {
|
|
/* write cmd and args for firmware */
|
|
ret = i2c_master_send(s->client, cmd->args, cmd->wlen);
|
|
if (ret < 0) {
|
|
goto err_mutex_unlock;
|
|
} else if (ret != cmd->wlen) {
|
|
ret = -EREMOTEIO;
|
|
goto err_mutex_unlock;
|
|
}
|
|
}
|
|
|
|
if (cmd->rlen) {
|
|
/* wait cmd execution terminate */
|
|
#define TIMEOUT 80
|
|
timeout = jiffies + msecs_to_jiffies(TIMEOUT);
|
|
while (!time_after(jiffies, timeout)) {
|
|
ret = i2c_master_recv(s->client, cmd->args, cmd->rlen);
|
|
if (ret < 0) {
|
|
goto err_mutex_unlock;
|
|
} else if (ret != cmd->rlen) {
|
|
ret = -EREMOTEIO;
|
|
goto err_mutex_unlock;
|
|
}
|
|
|
|
/* firmware ready? */
|
|
if ((cmd->args[0] >> 7) & 0x01)
|
|
break;
|
|
}
|
|
|
|
dev_dbg(&s->client->dev, "cmd execution took %d ms\n",
|
|
jiffies_to_msecs(jiffies) -
|
|
(jiffies_to_msecs(timeout) - TIMEOUT));
|
|
|
|
if (!((cmd->args[0] >> 7) & 0x01)) {
|
|
ret = -ETIMEDOUT;
|
|
goto err_mutex_unlock;
|
|
}
|
|
}
|
|
|
|
ret = 0;
|
|
|
|
err_mutex_unlock:
|
|
mutex_unlock(&s->i2c_mutex);
|
|
if (ret)
|
|
goto err;
|
|
|
|
return 0;
|
|
err:
|
|
dev_dbg(&s->client->dev, "failed=%d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
static int si2157_init(struct dvb_frontend *fe)
|
|
{
|
|
struct si2157 *s = fe->tuner_priv;
|
|
int ret, len, remaining;
|
|
struct si2157_cmd cmd;
|
|
const struct firmware *fw = NULL;
|
|
u8 *fw_file;
|
|
unsigned int chip_id;
|
|
|
|
dev_dbg(&s->client->dev, "\n");
|
|
|
|
if (s->fw_loaded)
|
|
goto warm;
|
|
|
|
/* power up */
|
|
memcpy(cmd.args, "\xc0\x00\x0c\x00\x00\x01\x01\x01\x01\x01\x01\x02\x00\x00\x01", 15);
|
|
cmd.wlen = 15;
|
|
cmd.rlen = 1;
|
|
ret = si2157_cmd_execute(s, &cmd);
|
|
if (ret)
|
|
goto err;
|
|
|
|
/* query chip revision */
|
|
memcpy(cmd.args, "\x02", 1);
|
|
cmd.wlen = 1;
|
|
cmd.rlen = 13;
|
|
ret = si2157_cmd_execute(s, &cmd);
|
|
if (ret)
|
|
goto err;
|
|
|
|
chip_id = cmd.args[1] << 24 | cmd.args[2] << 16 | cmd.args[3] << 8 |
|
|
cmd.args[4] << 0;
|
|
|
|
#define SI2158_A20 ('A' << 24 | 58 << 16 | '2' << 8 | '0' << 0)
|
|
#define SI2157_A30 ('A' << 24 | 57 << 16 | '3' << 8 | '0' << 0)
|
|
#define SI2147_A30 ('A' << 24 | 47 << 16 | '3' << 8 | '0' << 0)
|
|
|
|
switch (chip_id) {
|
|
case SI2158_A20:
|
|
fw_file = SI2158_A20_FIRMWARE;
|
|
break;
|
|
case SI2157_A30:
|
|
case SI2147_A30:
|
|
goto skip_fw_download;
|
|
break;
|
|
default:
|
|
dev_err(&s->client->dev,
|
|
"unknown chip version Si21%d-%c%c%c\n",
|
|
cmd.args[2], cmd.args[1],
|
|
cmd.args[3], cmd.args[4]);
|
|
ret = -EINVAL;
|
|
goto err;
|
|
}
|
|
|
|
/* cold state - try to download firmware */
|
|
dev_info(&s->client->dev, "found a '%s' in cold state\n",
|
|
si2157_ops.info.name);
|
|
|
|
/* request the firmware, this will block and timeout */
|
|
ret = request_firmware(&fw, fw_file, &s->client->dev);
|
|
if (ret) {
|
|
dev_err(&s->client->dev, "firmware file '%s' not found\n",
|
|
fw_file);
|
|
goto err;
|
|
}
|
|
|
|
/* firmware should be n chunks of 17 bytes */
|
|
if (fw->size % 17 != 0) {
|
|
dev_err(&s->client->dev, "firmware file '%s' is invalid\n",
|
|
fw_file);
|
|
ret = -EINVAL;
|
|
goto err;
|
|
}
|
|
|
|
dev_info(&s->client->dev, "downloading firmware from file '%s'\n",
|
|
fw_file);
|
|
|
|
for (remaining = fw->size; remaining > 0; remaining -= 17) {
|
|
len = fw->data[fw->size - remaining];
|
|
memcpy(cmd.args, &fw->data[(fw->size - remaining) + 1], len);
|
|
cmd.wlen = len;
|
|
cmd.rlen = 1;
|
|
ret = si2157_cmd_execute(s, &cmd);
|
|
if (ret) {
|
|
dev_err(&s->client->dev,
|
|
"firmware download failed=%d\n",
|
|
ret);
|
|
goto err;
|
|
}
|
|
}
|
|
|
|
release_firmware(fw);
|
|
fw = NULL;
|
|
|
|
skip_fw_download:
|
|
/* reboot the tuner with new firmware? */
|
|
memcpy(cmd.args, "\x01\x01", 2);
|
|
cmd.wlen = 2;
|
|
cmd.rlen = 1;
|
|
ret = si2157_cmd_execute(s, &cmd);
|
|
if (ret)
|
|
goto err;
|
|
|
|
s->fw_loaded = true;
|
|
|
|
warm:
|
|
s->active = true;
|
|
return 0;
|
|
|
|
err:
|
|
if (fw)
|
|
release_firmware(fw);
|
|
|
|
dev_dbg(&s->client->dev, "failed=%d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
static int si2157_sleep(struct dvb_frontend *fe)
|
|
{
|
|
struct si2157 *s = fe->tuner_priv;
|
|
int ret;
|
|
struct si2157_cmd cmd;
|
|
|
|
dev_dbg(&s->client->dev, "\n");
|
|
|
|
s->active = false;
|
|
|
|
/* standby */
|
|
memcpy(cmd.args, "\x16\x00", 2);
|
|
cmd.wlen = 2;
|
|
cmd.rlen = 1;
|
|
ret = si2157_cmd_execute(s, &cmd);
|
|
if (ret)
|
|
goto err;
|
|
|
|
return 0;
|
|
err:
|
|
dev_dbg(&s->client->dev, "failed=%d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
static int si2157_set_params(struct dvb_frontend *fe)
|
|
{
|
|
struct si2157 *s = fe->tuner_priv;
|
|
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
|
|
int ret;
|
|
struct si2157_cmd cmd;
|
|
u8 bandwidth, delivery_system;
|
|
|
|
dev_dbg(&s->client->dev,
|
|
"delivery_system=%d frequency=%u bandwidth_hz=%u\n",
|
|
c->delivery_system, c->frequency,
|
|
c->bandwidth_hz);
|
|
|
|
if (!s->active) {
|
|
ret = -EAGAIN;
|
|
goto err;
|
|
}
|
|
|
|
if (c->bandwidth_hz <= 6000000)
|
|
bandwidth = 0x06;
|
|
else if (c->bandwidth_hz <= 7000000)
|
|
bandwidth = 0x07;
|
|
else if (c->bandwidth_hz <= 8000000)
|
|
bandwidth = 0x08;
|
|
else
|
|
bandwidth = 0x0f;
|
|
|
|
switch (c->delivery_system) {
|
|
case SYS_ATSC:
|
|
delivery_system = 0x00;
|
|
break;
|
|
case SYS_DVBT:
|
|
case SYS_DVBT2: /* it seems DVB-T and DVB-T2 both are 0x20 here */
|
|
delivery_system = 0x20;
|
|
break;
|
|
case SYS_DVBC_ANNEX_A:
|
|
delivery_system = 0x30;
|
|
break;
|
|
default:
|
|
ret = -EINVAL;
|
|
goto err;
|
|
}
|
|
|
|
memcpy(cmd.args, "\x14\x00\x03\x07\x00\x00", 6);
|
|
cmd.args[4] = delivery_system | bandwidth;
|
|
if (s->inversion)
|
|
cmd.args[5] = 0x01;
|
|
cmd.wlen = 6;
|
|
cmd.rlen = 4;
|
|
ret = si2157_cmd_execute(s, &cmd);
|
|
if (ret)
|
|
goto err;
|
|
|
|
memcpy(cmd.args, "\x14\x00\x02\x07\x01\x00", 6);
|
|
cmd.wlen = 6;
|
|
cmd.rlen = 4;
|
|
ret = si2157_cmd_execute(s, &cmd);
|
|
if (ret)
|
|
goto err;
|
|
|
|
/* set frequency */
|
|
memcpy(cmd.args, "\x41\x00\x00\x00\x00\x00\x00\x00", 8);
|
|
cmd.args[4] = (c->frequency >> 0) & 0xff;
|
|
cmd.args[5] = (c->frequency >> 8) & 0xff;
|
|
cmd.args[6] = (c->frequency >> 16) & 0xff;
|
|
cmd.args[7] = (c->frequency >> 24) & 0xff;
|
|
cmd.wlen = 8;
|
|
cmd.rlen = 1;
|
|
ret = si2157_cmd_execute(s, &cmd);
|
|
if (ret)
|
|
goto err;
|
|
|
|
return 0;
|
|
err:
|
|
dev_dbg(&s->client->dev, "failed=%d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
static int si2157_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
|
|
{
|
|
*frequency = 5000000; /* default value of property 0x0706 */
|
|
return 0;
|
|
}
|
|
|
|
static const struct dvb_tuner_ops si2157_ops = {
|
|
.info = {
|
|
.name = "Silicon Labs Si2157/Si2158",
|
|
.frequency_min = 110000000,
|
|
.frequency_max = 862000000,
|
|
},
|
|
|
|
.init = si2157_init,
|
|
.sleep = si2157_sleep,
|
|
.set_params = si2157_set_params,
|
|
.get_if_frequency = si2157_get_if_frequency,
|
|
};
|
|
|
|
static int si2157_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct si2157_config *cfg = client->dev.platform_data;
|
|
struct dvb_frontend *fe = cfg->fe;
|
|
struct si2157 *s;
|
|
struct si2157_cmd cmd;
|
|
int ret;
|
|
|
|
s = kzalloc(sizeof(struct si2157), GFP_KERNEL);
|
|
if (!s) {
|
|
ret = -ENOMEM;
|
|
dev_err(&client->dev, "kzalloc() failed\n");
|
|
goto err;
|
|
}
|
|
|
|
s->client = client;
|
|
s->fe = cfg->fe;
|
|
s->inversion = cfg->inversion;
|
|
s->fw_loaded = false;
|
|
mutex_init(&s->i2c_mutex);
|
|
|
|
/* check if the tuner is there */
|
|
cmd.wlen = 0;
|
|
cmd.rlen = 1;
|
|
ret = si2157_cmd_execute(s, &cmd);
|
|
if (ret)
|
|
goto err;
|
|
|
|
fe->tuner_priv = s;
|
|
memcpy(&fe->ops.tuner_ops, &si2157_ops,
|
|
sizeof(struct dvb_tuner_ops));
|
|
|
|
i2c_set_clientdata(client, s);
|
|
|
|
dev_info(&s->client->dev,
|
|
"Silicon Labs Si2157/Si2158 successfully attached\n");
|
|
return 0;
|
|
err:
|
|
dev_dbg(&client->dev, "failed=%d\n", ret);
|
|
kfree(s);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int si2157_remove(struct i2c_client *client)
|
|
{
|
|
struct si2157 *s = i2c_get_clientdata(client);
|
|
struct dvb_frontend *fe = s->fe;
|
|
|
|
dev_dbg(&client->dev, "\n");
|
|
|
|
memset(&fe->ops.tuner_ops, 0, sizeof(struct dvb_tuner_ops));
|
|
fe->tuner_priv = NULL;
|
|
kfree(s);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct i2c_device_id si2157_id[] = {
|
|
{"si2157", 0},
|
|
{}
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, si2157_id);
|
|
|
|
static struct i2c_driver si2157_driver = {
|
|
.driver = {
|
|
.owner = THIS_MODULE,
|
|
.name = "si2157",
|
|
},
|
|
.probe = si2157_probe,
|
|
.remove = si2157_remove,
|
|
.id_table = si2157_id,
|
|
};
|
|
|
|
module_i2c_driver(si2157_driver);
|
|
|
|
MODULE_DESCRIPTION("Silicon Labs Si2157/Si2158 silicon tuner driver");
|
|
MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_FIRMWARE(SI2158_A20_FIRMWARE);
|