drivers/media/tuners/tda18212.c - vendor/opensource/backports - Git at Google

 /*
  * NXP TDA18212HN silicon tuner driver
  *
  * Copyright (C) 2011 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.
  *
  *    You should have received a copy of the GNU General Public License along
  *    with this program; if not, write to the Free Software Foundation, Inc.,
  *    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */

 #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]  = { 0xb3, 0x20, 0x03 },
 		[DVBT_7]  = { 0xb3, 0x31, 0x01 },
 		[DVBT_8]  = { 0xb3, 0x22, 0x01 },
 		[DVBT2_6] = { 0xbc, 0x20, 0x03 },
 		[DVBT2_7] = { 0xbc, 0x72, 0x03 },
 		[DVBT2_8] = { 0xbc, 0x22, 0x01 },
 		[DVBC_6]  = { 0x92, 0x50, 0x03 },
 		[DVBC_8]  = { 0x92, 0x53, 0x03 },
 		[ATSC_VSB] = { 0x7d, 0x20, 0x63 },
 		[ATSC_QAM] = { 0x7d, 0x20, 0x63 },
 	};

 	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, 0x23, bw_params[i][2]);
 	if (ret)
 		goto error;

 	ret = regmap_write(dev->regmap, 0x06, 0x00);
 	if (ret)
 		goto error;

 	ret = regmap_write(dev->regmap, 0x0f, bw_params[i][0]);
 	if (ret)
 		goto error;

 	buf[0] = 0x02;
 	buf[1] = bw_params[i][1];
 	buf[2] = 0x03; /* default value */
 	buf[3] = DIV_ROUND_CLOSEST(if_khz, 50);
 	buf[4] = ((c->frequency / 1000) >> 16) & 0xff;
 	buf[5] = ((c->frequency / 1000) >>  8) & 0xff;
 	buf[6] = ((c->frequency / 1000) >>  0) & 0xff;
 	buf[7] = 0xc1;
 	buf[8] = 0x01;
 	ret = regmap_bulk_write(dev->regmap, 0x12, 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  =  48000000,
 		.frequency_max  = 864000000,
 		.frequency_step =      1000,
 	},

 	.set_params    = tda18212_set_params,
 	.get_if_frequency = tda18212_get_if_frequency,
 };

 static int tda18212_probe(struct i2c_client *client,
 		const struct i2c_device_id *id)
 {
 	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, &regmap_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, 0x00, &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 0xc7:
 		version = "M"; /* master */
 		break;
 	case 0x47:
 		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 int 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);

 	return 0;
 }

 static const struct i2c_device_id tda18212_id[] = {
 	{"tda18212", 0},
 	{}
 };
 MODULE_DEVICE_TABLE(i2c, tda18212_id);

 static struct i2c_driver tda18212_driver = {
 	.driver = {
 		.owner	= THIS_MODULE,
 		.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");
	/*
	* NXP TDA18212HN silicon tuner driver
	*
	* Copyright (C) 2011 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.
	*
	* You should have received a copy of the GNU General Public License along
	* with this program; if not, write to the Free Software Foundation, Inc.,
	* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
	*/

	#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] = { 0xb3, 0x20, 0x03 },
	[DVBT_7] = { 0xb3, 0x31, 0x01 },
	[DVBT_8] = { 0xb3, 0x22, 0x01 },
	[DVBT2_6] = { 0xbc, 0x20, 0x03 },
	[DVBT2_7] = { 0xbc, 0x72, 0x03 },
	[DVBT2_8] = { 0xbc, 0x22, 0x01 },
	[DVBC_6] = { 0x92, 0x50, 0x03 },
	[DVBC_8] = { 0x92, 0x53, 0x03 },
	[ATSC_VSB] = { 0x7d, 0x20, 0x63 },
	[ATSC_QAM] = { 0x7d, 0x20, 0x63 },
	};

	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, 0x23, bw_params[i][2]);
	if (ret)
	goto error;

	ret = regmap_write(dev->regmap, 0x06, 0x00);
	if (ret)
	goto error;

	ret = regmap_write(dev->regmap, 0x0f, bw_params[i][0]);
	if (ret)
	goto error;

	buf[0] = 0x02;
	buf[1] = bw_params[i][1];
	buf[2] = 0x03; /* default value */
	buf[3] = DIV_ROUND_CLOSEST(if_khz, 50);
	buf[4] = ((c->frequency / 1000) >> 16) & 0xff;
	buf[5] = ((c->frequency / 1000) >> 8) & 0xff;
	buf[6] = ((c->frequency / 1000) >> 0) & 0xff;
	buf[7] = 0xc1;
	buf[8] = 0x01;
	ret = regmap_bulk_write(dev->regmap, 0x12, 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 = 48000000,
	.frequency_max = 864000000,
	.frequency_step = 1000,
	},

	.set_params = tda18212_set_params,
	.get_if_frequency = tda18212_get_if_frequency,
	};

	static int tda18212_probe(struct i2c_client *client,
	const struct i2c_device_id *id)
	{
	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, &regmap_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, 0x00, &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 0xc7:
	version = "M"; /* master */
	break;
	case 0x47:
	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 int 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);

	return 0;
	}

	static const struct i2c_device_id tda18212_id[] = {
	{"tda18212", 0},
	{}
	};
	MODULE_DEVICE_TABLE(i2c, tda18212_id);

	static struct i2c_driver tda18212_driver = {
	.driver = {
	.owner = THIS_MODULE,
	.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");