drivers/media/tuners/tda18212.c - maze/linux - 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"

 /* Max transfer size done by I2C transfer functions */
 #define MAX_XFER_SIZE  64

 struct tda18212_priv {
 	struct tda18212_config *cfg;
 	struct i2c_adapter *i2c;

 	u32 if_frequency;
 };

 /* write multiple registers */
 static int tda18212_wr_regs(struct tda18212_priv *priv, u8 reg, u8 *val,
 	int len)
 {
 	int ret;
 	u8 buf[MAX_XFER_SIZE];
 	struct i2c_msg msg[1] = {
 		{
 			.addr = priv->cfg->i2c_address,
 			.flags = 0,
 			.len = 1 + len,
 			.buf = buf,
 		}
 	};

 	if (1 + len > sizeof(buf)) {
 		dev_warn(&priv->i2c->dev,
 			 "%s: i2c wr reg=%04x: len=%d is too big!\n",
 			 KBUILD_MODNAME, reg, len);
 		return -EINVAL;
 	}

 	buf[0] = reg;
 	memcpy(&buf[1], val, len);

 	ret = i2c_transfer(priv->i2c, msg, 1);
 	if (ret == 1) {
 		ret = 0;
 	} else {
 		dev_warn(&priv->i2c->dev, "%s: i2c wr failed=%d reg=%02x " \
 				"len=%d\n", KBUILD_MODNAME, ret, reg, len);
 		ret = -EREMOTEIO;
 	}
 	return ret;
 }

 /* read multiple registers */
 static int tda18212_rd_regs(struct tda18212_priv *priv, u8 reg, u8 *val,
 	int len)
 {
 	int ret;
 	u8 buf[MAX_XFER_SIZE];
 	struct i2c_msg msg[2] = {
 		{
 			.addr = priv->cfg->i2c_address,
 			.flags = 0,
 			.len = 1,
 			.buf = &reg,
 		}, {
 			.addr = priv->cfg->i2c_address,
 			.flags = I2C_M_RD,
 			.len = len,
 			.buf = buf,
 		}
 	};

 	if (len > sizeof(buf)) {
 		dev_warn(&priv->i2c->dev,
 			 "%s: i2c rd reg=%04x: len=%d is too big!\n",
 			 KBUILD_MODNAME, reg, len);
 		return -EINVAL;
 	}

 	ret = i2c_transfer(priv->i2c, msg, 2);
 	if (ret == 2) {
 		memcpy(val, buf, len);
 		ret = 0;
 	} else {
 		dev_warn(&priv->i2c->dev, "%s: i2c rd failed=%d reg=%02x " \
 				"len=%d\n", KBUILD_MODNAME, ret, reg, len);
 		ret = -EREMOTEIO;
 	}

 	return ret;
 }

 /* write single register */
 static int tda18212_wr_reg(struct tda18212_priv *priv, u8 reg, u8 val)
 {
 	return tda18212_wr_regs(priv, reg, &val, 1);
 }

 /* read single register */
 static int tda18212_rd_reg(struct tda18212_priv *priv, u8 reg, u8 *val)
 {
 	return tda18212_rd_regs(priv, reg, val, 1);
 }

 #if 0 /* keep, useful when developing driver */
 static void tda18212_dump_regs(struct tda18212_priv *priv)
 {
 	int i;
 	u8 buf[256];

 	#define TDA18212_RD_LEN 32
 	for (i = 0; i < sizeof(buf); i += TDA18212_RD_LEN)
 		tda18212_rd_regs(priv, i, &buf[i], TDA18212_RD_LEN);

 	print_hex_dump(KERN_INFO, "", DUMP_PREFIX_OFFSET, 32, 1, buf,
 		sizeof(buf), true);

 	return;
 }
 #endif

 static int tda18212_set_params(struct dvb_frontend *fe)
 {
 	struct tda18212_priv *priv = 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(&priv->i2c->dev,
 			"%s: delivery_system=%d frequency=%d bandwidth_hz=%d\n",
 			__func__, 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 = priv->cfg->if_atsc_vsb;
 		i = ATSC_VSB;
 		break;
 	case SYS_DVBC_ANNEX_B:
 		if_khz = priv->cfg->if_atsc_qam;
 		i = ATSC_QAM;
 		break;
 	case SYS_DVBT:
 		switch (c->bandwidth_hz) {
 		case 6000000:
 			if_khz = priv->cfg->if_dvbt_6;
 			i = DVBT_6;
 			break;
 		case 7000000:
 			if_khz = priv->cfg->if_dvbt_7;
 			i = DVBT_7;
 			break;
 		case 8000000:
 			if_khz = priv->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 = priv->cfg->if_dvbt2_6;
 			i = DVBT2_6;
 			break;
 		case 7000000:
 			if_khz = priv->cfg->if_dvbt2_7;
 			i = DVBT2_7;
 			break;
 		case 8000000:
 			if_khz = priv->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 = priv->cfg->if_dvbc;
 		i = DVBC_8;
 		break;
 	default:
 		ret = -EINVAL;
 		goto error;
 	}

 	ret = tda18212_wr_reg(priv, 0x23, bw_params[i][2]);
 	if (ret)
 		goto error;

 	ret = tda18212_wr_reg(priv, 0x06, 0x00);
 	if (ret)
 		goto error;

 	ret = tda18212_wr_reg(priv, 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 = tda18212_wr_regs(priv, 0x12, buf, sizeof(buf));
 	if (ret)
 		goto error;

 	/* actual IF rounded as it is on register */
 	priv->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(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
 	goto exit;
 }

 static int tda18212_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
 {
 	struct tda18212_priv *priv = fe->tuner_priv;

 	*frequency = priv->if_frequency;

 	return 0;
 }

 static int tda18212_release(struct dvb_frontend *fe)
 {
 	kfree(fe->tuner_priv);
 	fe->tuner_priv = NULL;
 	return 0;
 }

 static const struct dvb_tuner_ops tda18212_tuner_ops = {
 	.info = {
 		.name           = "NXP TDA18212",

 		.frequency_min  =  48000000,
 		.frequency_max  = 864000000,
 		.frequency_step =      1000,
 	},

 	.release       = tda18212_release,

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

 struct dvb_frontend *tda18212_attach(struct dvb_frontend *fe,
 	struct i2c_adapter *i2c, struct tda18212_config *cfg)
 {
 	struct tda18212_priv *priv = NULL;
 	int ret;
 	u8 val;

 	priv = kzalloc(sizeof(struct tda18212_priv), GFP_KERNEL);
 	if (priv == NULL)
 		return NULL;

 	priv->cfg = cfg;
 	priv->i2c = i2c;
 	fe->tuner_priv = priv;

 	if (fe->ops.i2c_gate_ctrl)
 		fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */

 	/* check if the tuner is there */
 	ret = tda18212_rd_reg(priv, 0x00, &val);

 	if (fe->ops.i2c_gate_ctrl)
 		fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */

 	if (!ret)
 		dev_dbg(&priv->i2c->dev, "%s: chip id=%02x\n", __func__, val);
 	if (ret || val != 0xc7) {
 		kfree(priv);
 		return NULL;
 	}

 	dev_info(&priv->i2c->dev,
 			"%s: NXP TDA18212HN successfully identified\n",
 			KBUILD_MODNAME);

 	memcpy(&fe->ops.tuner_ops, &tda18212_tuner_ops,
 		sizeof(struct dvb_tuner_ops));

 	return fe;
 }
 EXPORT_SYMBOL(tda18212_attach);

 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"

	/* Max transfer size done by I2C transfer functions */
	#define MAX_XFER_SIZE 64

	struct tda18212_priv {
	struct tda18212_config *cfg;
	struct i2c_adapter *i2c;

	u32 if_frequency;
	};

	/* write multiple registers */
	static int tda18212_wr_regs(struct tda18212_priv priv, u8 reg, u8 val,
	int len)
	{
	int ret;
	u8 buf[MAX_XFER_SIZE];
	struct i2c_msg msg[1] = {
	{
	.addr = priv->cfg->i2c_address,
	.flags = 0,
	.len = 1 + len,
	.buf = buf,
	}
	};

	if (1 + len > sizeof(buf)) {
	dev_warn(&priv->i2c->dev,
	"%s: i2c wr reg=%04x: len=%d is too big!\n",
	KBUILD_MODNAME, reg, len);
	return -EINVAL;
	}

	buf[0] = reg;
	memcpy(&buf[1], val, len);

	ret = i2c_transfer(priv->i2c, msg, 1);
	if (ret == 1) {
	ret = 0;
	} else {
	dev_warn(&priv->i2c->dev, "%s: i2c wr failed=%d reg=%02x " \
	"len=%d\n", KBUILD_MODNAME, ret, reg, len);
	ret = -EREMOTEIO;
	}
	return ret;
	}

	/* read multiple registers */
	static int tda18212_rd_regs(struct tda18212_priv priv, u8 reg, u8 val,
	int len)
	{
	int ret;
	u8 buf[MAX_XFER_SIZE];
	struct i2c_msg msg[2] = {
	{
	.addr = priv->cfg->i2c_address,
	.flags = 0,
	.len = 1,
	.buf = &reg,
	}, {
	.addr = priv->cfg->i2c_address,
	.flags = I2C_M_RD,
	.len = len,
	.buf = buf,
	}
	};

	if (len > sizeof(buf)) {
	dev_warn(&priv->i2c->dev,
	"%s: i2c rd reg=%04x: len=%d is too big!\n",
	KBUILD_MODNAME, reg, len);
	return -EINVAL;
	}

	ret = i2c_transfer(priv->i2c, msg, 2);
	if (ret == 2) {
	memcpy(val, buf, len);
	ret = 0;
	} else {
	dev_warn(&priv->i2c->dev, "%s: i2c rd failed=%d reg=%02x " \
	"len=%d\n", KBUILD_MODNAME, ret, reg, len);
	ret = -EREMOTEIO;
	}

	return ret;
	}

	/* write single register */
	static int tda18212_wr_reg(struct tda18212_priv *priv, u8 reg, u8 val)
	{
	return tda18212_wr_regs(priv, reg, &val, 1);
	}

	/* read single register */
	static int tda18212_rd_reg(struct tda18212_priv priv, u8 reg, u8 val)
	{
	return tda18212_rd_regs(priv, reg, val, 1);
	}

	#if 0 /* keep, useful when developing driver */
	static void tda18212_dump_regs(struct tda18212_priv *priv)
	{
	int i;
	u8 buf[256];

	#define TDA18212_RD_LEN 32
	for (i = 0; i < sizeof(buf); i += TDA18212_RD_LEN)
	tda18212_rd_regs(priv, i, &buf[i], TDA18212_RD_LEN);

	print_hex_dump(KERN_INFO, "", DUMP_PREFIX_OFFSET, 32, 1, buf,
	sizeof(buf), true);

	return;
	}
	#endif

	static int tda18212_set_params(struct dvb_frontend *fe)
	{
	struct tda18212_priv *priv = 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(&priv->i2c->dev,
	"%s: delivery_system=%d frequency=%d bandwidth_hz=%d\n",
	__func__, 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 = priv->cfg->if_atsc_vsb;
	i = ATSC_VSB;
	break;
	case SYS_DVBC_ANNEX_B:
	if_khz = priv->cfg->if_atsc_qam;
	i = ATSC_QAM;
	break;
	case SYS_DVBT:
	switch (c->bandwidth_hz) {
	case 6000000:
	if_khz = priv->cfg->if_dvbt_6;
	i = DVBT_6;
	break;
	case 7000000:
	if_khz = priv->cfg->if_dvbt_7;
	i = DVBT_7;
	break;
	case 8000000:
	if_khz = priv->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 = priv->cfg->if_dvbt2_6;
	i = DVBT2_6;
	break;
	case 7000000:
	if_khz = priv->cfg->if_dvbt2_7;
	i = DVBT2_7;
	break;
	case 8000000:
	if_khz = priv->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 = priv->cfg->if_dvbc;
	i = DVBC_8;
	break;
	default:
	ret = -EINVAL;
	goto error;
	}

	ret = tda18212_wr_reg(priv, 0x23, bw_params[i][2]);
	if (ret)
	goto error;

	ret = tda18212_wr_reg(priv, 0x06, 0x00);
	if (ret)
	goto error;

	ret = tda18212_wr_reg(priv, 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 = tda18212_wr_regs(priv, 0x12, buf, sizeof(buf));
	if (ret)
	goto error;

	/* actual IF rounded as it is on register */
	priv->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(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
	goto exit;
	}

	static int tda18212_get_if_frequency(struct dvb_frontend fe, u32 frequency)
	{
	struct tda18212_priv *priv = fe->tuner_priv;

	*frequency = priv->if_frequency;

	return 0;
	}

	static int tda18212_release(struct dvb_frontend *fe)
	{
	kfree(fe->tuner_priv);
	fe->tuner_priv = NULL;
	return 0;
	}

	static const struct dvb_tuner_ops tda18212_tuner_ops = {
	.info = {
	.name = "NXP TDA18212",

	.frequency_min = 48000000,
	.frequency_max = 864000000,
	.frequency_step = 1000,
	},

	.release = tda18212_release,

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

	struct dvb_frontend tda18212_attach(struct dvb_frontend fe,
	struct i2c_adapter i2c, struct tda18212_config cfg)
	{
	struct tda18212_priv *priv = NULL;
	int ret;
	u8 val;

	priv = kzalloc(sizeof(struct tda18212_priv), GFP_KERNEL);
	if (priv == NULL)
	return NULL;

	priv->cfg = cfg;
	priv->i2c = i2c;
	fe->tuner_priv = priv;

	if (fe->ops.i2c_gate_ctrl)
	fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */

	/* check if the tuner is there */
	ret = tda18212_rd_reg(priv, 0x00, &val);

	if (fe->ops.i2c_gate_ctrl)
	fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */

	if (!ret)
	dev_dbg(&priv->i2c->dev, "%s: chip id=%02x\n", __func__, val);
	if (ret \|\| val != 0xc7) {
	kfree(priv);
	return NULL;
	}

	dev_info(&priv->i2c->dev,
	"%s: NXP TDA18212HN successfully identified\n",
	KBUILD_MODNAME);

	memcpy(&fe->ops.tuner_ops, &tda18212_tuner_ops,
	sizeof(struct dvb_tuner_ops));

	return fe;
	}
	EXPORT_SYMBOL(tda18212_attach);

	MODULE_DESCRIPTION("NXP TDA18212HN silicon tuner driver");
	MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
	MODULE_LICENSE("GPL");