// SPDX-License-Identifier: GPL-2.0-or-later
/*
* NXP TDA18212HN silicon tuner driver
*
* Copyright (C) 2011 Antti Palosaari <crope@iki.fi>
*/
#include "tda18212.h"
#include <linux/regmap.h>
struct tda18212_dev {
struct tda18212_config cfg;
struct i2c_client *client;
struct regmap *regmap;
u32 if_frequency;
};
static int tda18212_set_params(struct dvb_frontend *fe)
{
struct tda18212_dev *dev = fe->tuner_priv;
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
int ret, i;
u32 if_khz;
u8 buf[9 ];
#define DVBT_6 0
#define DVBT_7 1
#define DVBT_8 2
#define DVBT2_6 3
#define DVBT2_7 4
#define DVBT2_8 5
#define DVBC_6 6
#define DVBC_8 7
#define ATSC_VSB 8
#define ATSC_QAM 9
static const u8 bw_params[][3 ] = {
/* reg: 0f 13 23 */
[DVBT_6] = { 0 xb3, 0 x20, 0 x03 },
[DVBT_7] = { 0 xb3, 0 x31, 0 x01 },
[DVBT_8] = { 0 xb3, 0 x22, 0 x01 },
[DVBT2_6] = { 0 xbc, 0 x20, 0 x03 },
[DVBT2_7] = { 0 xbc, 0 x72, 0 x03 },
[DVBT2_8] = { 0 xbc, 0 x22, 0 x01 },
[DVBC_6] = { 0 x92, 0 x50, 0 x03 },
[DVBC_8] = { 0 x92, 0 x53, 0 x03 },
[ATSC_VSB] = { 0 x7d, 0 x20, 0 x63 },
[ATSC_QAM] = { 0 x7d, 0 x20, 0 x63 },
};
dev_dbg(&dev->client->dev,
"delivery_system=%d frequency=%d bandwidth_hz=%d\n" ,
c->delivery_system, c->frequency,
c->bandwidth_hz);
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1 ); /* open I2C-gate */
switch (c->delivery_system) {
case SYS_ATSC:
if_khz = dev->cfg.if_atsc_vsb;
i = ATSC_VSB;
break ;
case SYS_DVBC_ANNEX_B:
if_khz = dev->cfg.if_atsc_qam;
i = ATSC_QAM;
break ;
case SYS_DVBT:
switch (c->bandwidth_hz) {
case 6000000 :
if_khz = dev->cfg.if_dvbt_6;
i = DVBT_6;
break ;
case 7000000 :
if_khz = dev->cfg.if_dvbt_7;
i = DVBT_7;
break ;
case 8000000 :
if_khz = dev->cfg.if_dvbt_8;
i = DVBT_8;
break ;
default :
ret = -EINVAL;
goto error;
}
break ;
case SYS_DVBT2:
switch (c->bandwidth_hz) {
case 6000000 :
if_khz = dev->cfg.if_dvbt2_6;
i = DVBT2_6;
break ;
case 7000000 :
if_khz = dev->cfg.if_dvbt2_7;
i = DVBT2_7;
break ;
case 8000000 :
if_khz = dev->cfg.if_dvbt2_8;
i = DVBT2_8;
break ;
default :
ret = -EINVAL;
goto error;
}
break ;
case SYS_DVBC_ANNEX_A:
case SYS_DVBC_ANNEX_C:
if_khz = dev->cfg.if_dvbc;
i = DVBC_8;
break ;
default :
ret = -EINVAL;
goto error;
}
ret = regmap_write(dev->regmap, 0 x23, bw_params[i][2 ]);
if (ret)
goto error;
ret = regmap_write(dev->regmap, 0 x06, 0 x00);
if (ret)
goto error;
ret = regmap_write(dev->regmap, 0 x0f, bw_params[i][0 ]);
if (ret)
goto error;
buf[0 ] = 0 x02;
buf[1 ] = bw_params[i][1 ];
buf[2 ] = 0 x03; /* default value */
buf[3 ] = DIV_ROUND_CLOSEST(if_khz, 50 );
buf[4 ] = ((c->frequency / 1000 ) >> 16 ) & 0 xff;
buf[5 ] = ((c->frequency / 1000 ) >> 8 ) & 0 xff;
buf[6 ] = ((c->frequency / 1000 ) >> 0 ) & 0 xff;
buf[7 ] = 0 xc1;
buf[8 ] = 0 x01;
ret = regmap_bulk_write(dev->regmap, 0 x12, buf, sizeof (buf));
if (ret)
goto error;
/* actual IF rounded as it is on register */
dev->if_frequency = buf[3 ] * 50 * 1000 ;
exit :
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 0 ); /* close I2C-gate */
return ret;
error:
dev_dbg(&dev->client->dev, "failed=%d\n" , ret);
goto exit ;
}
static int tda18212_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
{
struct tda18212_dev *dev = fe->tuner_priv;
*frequency = dev->if_frequency;
return 0 ;
}
static const struct dvb_tuner_ops tda18212_tuner_ops = {
.info = {
.name = "NXP TDA18212" ,
.frequency_min_hz = 48 * MHz,
.frequency_max_hz = 864 * MHz,
.frequency_step_hz = 1 * kHz,
},
.set_params = tda18212_set_params,
.get_if_frequency = tda18212_get_if_frequency,
};
static int tda18212_probe(struct i2c_client *client)
{
struct tda18212_config *cfg = client->dev.platform_data;
struct dvb_frontend *fe = cfg->fe;
struct tda18212_dev *dev;
int ret;
unsigned int chip_id;
char *version;
static const struct regmap_config regmap_config = {
.reg_bits = 8 ,
.val_bits = 8 ,
};
dev = kzalloc(sizeof (*dev), GFP_KERNEL);
if (dev == NULL) {
ret = -ENOMEM;
dev_err(&client->dev, "kzalloc() failed\n" );
goto err;
}
memcpy(&dev->cfg, cfg, sizeof (struct tda18212_config));
dev->client = client;
dev->regmap = devm_regmap_init_i2c(client, ®map_config);
if (IS_ERR(dev->regmap)) {
ret = PTR_ERR(dev->regmap);
goto err;
}
/* check if the tuner is there */
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1 ); /* open I2C-gate */
ret = regmap_read(dev->regmap, 0 x00, &chip_id);
dev_dbg(&dev->client->dev, "chip_id=%02x\n" , chip_id);
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 0 ); /* close I2C-gate */
if (ret)
goto err;
switch (chip_id) {
case 0 xc7:
version = "M" ; /* master */
break ;
case 0 x47:
version = "S" ; /* slave */
break ;
default :
ret = -ENODEV;
goto err;
}
dev_info(&dev->client->dev,
"NXP TDA18212HN/%s successfully identified\n" , version);
fe->tuner_priv = dev;
memcpy(&fe->ops.tuner_ops, &tda18212_tuner_ops,
sizeof (struct dvb_tuner_ops));
i2c_set_clientdata(client, dev);
return 0 ;
err:
dev_dbg(&client->dev, "failed=%d\n" , ret);
kfree(dev);
return ret;
}
static void tda18212_remove(struct i2c_client *client)
{
struct tda18212_dev *dev = i2c_get_clientdata(client);
struct dvb_frontend *fe = dev->cfg.fe;
dev_dbg(&client->dev, "\n" );
memset(&fe->ops.tuner_ops, 0 , sizeof (struct dvb_tuner_ops));
fe->tuner_priv = NULL;
kfree(dev);
}
static const struct i2c_device_id tda18212_id[] = {
{ "tda18212" },
{}
};
MODULE_DEVICE_TABLE(i2c, tda18212_id);
static struct i2c_driver tda18212_driver = {
.driver = {
.name = "tda18212" ,
},
.probe = tda18212_probe,
.remove = tda18212_remove,
.id_table = tda18212_id,
};
module_i2c_driver(tda18212_driver);
MODULE_DESCRIPTION("NXP TDA18212HN silicon tuner driver" );
MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>" );
MODULE_LICENSE("GPL" );
Messung V0.5 in Prozent C=96 H=93 G=94
¤ Dauer der Verarbeitung: 0.9 Sekunden
(vorverarbeitet am 2026-06-08)
¤
*© Formatika GbR, Deutschland