Commit 00be2e7c authored by Andrew de Quincey's avatar Andrew de Quincey Committed by Mauro Carvalho Chehab
Browse files

V4L/DVB (4606): Add driver for TUA6100 



This driver was originally in budget-av.c, however I have extracted it into
a seperate file to permit reuse.
I also reworked the code to make it maintainable. I then examined the KNC1
windows drivers and rewrote the code in order to configure the PLL as they
do. This solves a lot of reported tuning problems.

Signed-off-by: default avatarAndrew de Quincey <adq_dvb@lidskialf.net>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@infradead.org>
parent c4e4aac8

drivers/media/dvb/frontends/Kconfig

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@@ -296,4 +296,11 @@ config DVB_ISL6421 
	help

	  An SEC control chip.



config DVB_TUA6100

	tristate "TUA6100 PLL"

	depends on DVB_CORE && I2C

	default m if DVB_FE_CUSTOMISE

	help

	  A DVBS PLL chip.



endmenu

drivers/media/dvb/frontends/Makefile

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@@ -36,3 +36,4 @@ obj-$(CONFIG_DVB_ISL6421) += isl6421.o 
obj-$(CONFIG_DVB_TDA10086) += tda10086.o

obj-$(CONFIG_DVB_TDA826X) += tda826x.o

obj-$(CONFIG_DVB_TUNER_MT2060) += mt2060.o

obj-$(CONFIG_DVB_TUA6100) += tua6100.o

drivers/media/dvb/frontends/tua6100.c

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/**

 * Driver for Infineon tua6100 pll.

 *

 * (c) 2006 Andrew de Quincey

 *

 * Based on code found in budget-av.c, which has the following:

 * Compiled from various sources by Michael Hunold <michael@mihu.de>

 *

 * CI interface support (c) 2004 Olivier Gournet <ogournet@anevia.com> &

 *                               Andrew de Quincey <adq_dvb@lidskialf.net>

 *

 * Copyright (C) 2002 Ralph Metzler <rjkm@metzlerbros.de>

 *

 * Copyright (C) 1999-2002 Ralph  Metzler

 *                       & Marcus Metzler for convergence integrated media GmbH

 * 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., 675 Mass Ave, Cambridge, MA 02139, USA.

 */



#include <linux/module.h>

#include <linux/dvb/frontend.h>

#include <asm/types.h>



#include "tua6100.h"



struct tua6100_priv {

	/* i2c details */

	int i2c_address;

	struct i2c_adapter *i2c;

	u32 frequency;

};



static int tua6100_release(struct dvb_frontend *fe)

{

	if (fe->tuner_priv)

		kfree(fe->tuner_priv);

	fe->tuner_priv = NULL;

	return 0;

}



static int tua6100_sleep(struct dvb_frontend *fe)

{

	struct tua6100_priv *priv = fe->tuner_priv;

	int ret;

	u8 reg0[] = { 0x00, 0x00 };

	struct i2c_msg msg = { .addr = priv->i2c_address, .flags = 0, .buf = reg0, .len = 2 };



	if (fe->ops.i2c_gate_ctrl)

		fe->ops.i2c_gate_ctrl(fe, 1);

	if ((ret = i2c_transfer (priv->i2c, &msg, 1)) != 1) {

		printk("%s: i2c error\n", __FUNCTION__);

	}

	if (fe->ops.i2c_gate_ctrl)

		fe->ops.i2c_gate_ctrl(fe, 0);



	return (ret == 1) ? 0 : ret;

}



static int tua6100_set_params(struct dvb_frontend *fe,

			      struct dvb_frontend_parameters *params)

{

	struct tua6100_priv *priv = fe->tuner_priv;

	u32 div;

	u32 prediv;

	u8 reg0[] = { 0x00, 0x00 };

	u8 reg1[] = { 0x01, 0x00, 0x00, 0x00 };

	u8 reg2[] = { 0x02, 0x00, 0x00 };

	struct i2c_msg msg0 = { .addr = priv->i2c_address, .flags = 0, .buf = reg0, .len = 2 };

	struct i2c_msg msg1 = { .addr = priv->i2c_address, .flags = 0, .buf = reg1, .len = 4 };

	struct i2c_msg msg2 = { .addr = priv->i2c_address, .flags = 0, .buf = reg2, .len = 3 };



#define _R 4

#define _P 32

#define _ri 4000000



	// setup register 0

	if (params->frequency < 2000000) {

		reg0[1] = 0x03;

	} else {

		reg0[1] = 0x07;

	}



	// setup register 1

	if (params->frequency < 1630000) {

		reg1[1] = 0x2c;

	} else {

		reg1[1] = 0x0c;

	}

	if (_P == 64)

		reg1[1] |= 0x40;

	if (params->frequency >= 1525000)

		reg1[1] |= 0x80;



	// register 2

	reg2[1] = (_R >> 8) & 0x03;

	reg2[2] = _R;

	if (params->frequency < 1455000) {

		reg2[1] |= 0x1c;

	} else if (params->frequency < 1630000) {

		reg2[1] |= 0x0c;

	} else {

		reg2[1] |= 0x1c;

	}



	// The N divisor ratio (note: params->frequency is in kHz, but we need it in Hz)

	prediv = (params->frequency * _R) / (_ri / 1000);

	div = prediv / _P;

	reg1[1] |= (div >> 9) & 0x03;

	reg1[2] = div >> 1;

	reg1[3] = (div << 7);

	priv->frequency = ((div * _P) * (_ri / 1000)) / _R;



	// Finally, calculate and store the value for A

	reg1[3] |= (prediv - (div*_P)) & 0x7f;



#undef _R

#undef _P

#undef _ri



	if (fe->ops.i2c_gate_ctrl)

		fe->ops.i2c_gate_ctrl(fe, 1);

	if (i2c_transfer(priv->i2c, &msg0, 1) != 1)

		return -EIO;



	if (fe->ops.i2c_gate_ctrl)

		fe->ops.i2c_gate_ctrl(fe, 1);

	if (i2c_transfer(priv->i2c, &msg2, 1) != 1)

		return -EIO;



	if (fe->ops.i2c_gate_ctrl)

		fe->ops.i2c_gate_ctrl(fe, 1);

	if (i2c_transfer(priv->i2c, &msg1, 1) != 1)

		return -EIO;



	if (fe->ops.i2c_gate_ctrl)

		fe->ops.i2c_gate_ctrl(fe, 0);



	return 0;

}



static int tua6100_get_frequency(struct dvb_frontend *fe, u32 *frequency)

{

	struct tua6100_priv *priv = fe->tuner_priv;

	*frequency = priv->frequency;

	return 0;

}



static struct dvb_tuner_ops tua6100_tuner_ops = {

	.info = {

		.name = "Infineon TUA6100",

		.frequency_min = 950000,

		.frequency_max = 2150000,

		.frequency_step = 1000,

	},

	.release = tua6100_release,

	.sleep = tua6100_sleep,

	.set_params = tua6100_set_params,

	.get_frequency = tua6100_get_frequency,

};



struct dvb_frontend *tua6100_attach(struct dvb_frontend *fe, int addr, struct i2c_adapter *i2c)

{

	struct tua6100_priv *priv = NULL;

	u8 b1 [] = { 0x80 };

	u8 b2 [] = { 0x00 };

	struct i2c_msg msg [] = { { .addr = addr, .flags = 0, .buf = b1, .len = 1 },

				  { .addr = addr, .flags = I2C_M_RD, .buf = b2, .len = 1 } };

	int ret;



	if (fe->ops.i2c_gate_ctrl)

		fe->ops.i2c_gate_ctrl(fe, 1);

	ret = i2c_transfer (i2c, msg, 2);

	if (fe->ops.i2c_gate_ctrl)

		fe->ops.i2c_gate_ctrl(fe, 0);



	if (ret != 2)

		return NULL;



	priv = kzalloc(sizeof(struct tua6100_priv), GFP_KERNEL);

	if (priv == NULL)

		return NULL;



	priv->i2c_address = addr;

	priv->i2c = i2c;



	memcpy(&fe->ops.tuner_ops, &tua6100_tuner_ops, sizeof(struct dvb_tuner_ops));

	fe->tuner_priv = priv;

	return fe;

}

EXPORT_SYMBOL(tua6100_attach);



MODULE_DESCRIPTION("DVB tua6100 driver");

MODULE_AUTHOR("Andrew de Quincey");

MODULE_LICENSE("GPL");

drivers/media/dvb/frontends/tua6100.h

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/**

 * Driver for Infineon tua6100 PLL.

 *

 * (c) 2006 Andrew de Quincey

 *

 * Based on code found in budget-av.c, which has the following:

 * Compiled from various sources by Michael Hunold <michael@mihu.de>

 *

 * CI interface support (c) 2004 Olivier Gournet <ogournet@anevia.com> &

 *                               Andrew de Quincey <adq_dvb@lidskialf.net>

 *

 * Copyright (C) 2002 Ralph Metzler <rjkm@metzlerbros.de>

 *

 * Copyright (C) 1999-2002 Ralph  Metzler

 *                       & Marcus Metzler for convergence integrated media GmbH

 * 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., 675 Mass Ave, Cambridge, MA 02139, USA.

 */



#ifndef __DVB_TUA6100_H__

#define __DVB_TUA6100_H__



#include <linux/i2c.h>

#include "dvb_frontend.h"



/**

 * Attach a tua6100 pll to the supplied frontend structure.

 *

 * @param fe Frontend to attach to.

 * @param addr i2c address of the pll.

 * @param i2c i2c adapter to use.

 * @return FE pointer on success, NULL on failure.

 */

extern struct dvb_frontend *tua6100_attach(struct dvb_frontend *fe, int addr, struct i2c_adapter *i2c);



#endif

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