linux/drivers/media/tuners/mt20xx.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * i2c tv tuner chip device driver
 * controls microtune tuners, mt2032 + mt2050 at the moment.
 *
 * This "mt20xx" module was split apart from the original "tuner" module.
 */
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/slab.h>
#include <linux/videodev2.h>
#include "tuner-i2c.h"
#include "mt20xx.h"

static int debug;
module_param(debug, int, 0644);
MODULE_PARM_DESC(…) …;

/* ---------------------------------------------------------------------- */

static unsigned int optimize_vco  = …;
module_param(optimize_vco,      int, 0644);

static unsigned int tv_antenna    = …;
module_param(tv_antenna,        int, 0644);

static unsigned int radio_antenna;
module_param(radio_antenna,     int, 0644);

/* ---------------------------------------------------------------------- */

#define MT2032 …
#define MT2030 …
#define MT2040 …
#define MT2050 …

static char *microtune_part[] = …;

struct microtune_priv { … };

static void microtune_release(struct dvb_frontend *fe)
{ … }

static int microtune_get_frequency(struct dvb_frontend *fe, u32 *frequency)
{ … }

// IsSpurInBand()?
static int mt2032_spurcheck(struct dvb_frontend *fe,
			    int f1, int f2, int spectrum_from,int spectrum_to)
{ … }

static int mt2032_compute_freq(struct dvb_frontend *fe,
			       unsigned int rfin,
			       unsigned int if1, unsigned int if2,
			       unsigned int spectrum_from,
			       unsigned int spectrum_to,
			       unsigned char *buf,
			       int *ret_sel,
			       unsigned int xogc) //all in Hz
{ … }

static int mt2032_check_lo_lock(struct dvb_frontend *fe)
{ … }

static int mt2032_optimize_vco(struct dvb_frontend *fe,int sel,int lock)
{ … }


static void mt2032_set_if_freq(struct dvb_frontend *fe, unsigned int rfin,
			       unsigned int if1, unsigned int if2,
			       unsigned int from, unsigned int to)
{ … }


static int mt2032_set_tv_freq(struct dvb_frontend *fe,
			      struct analog_parameters *params)
{ … }

static int mt2032_set_radio_freq(struct dvb_frontend *fe,
				 struct analog_parameters *params)
{ … }

static int mt2032_set_params(struct dvb_frontend *fe,
			     struct analog_parameters *params)
{ … }

static const struct dvb_tuner_ops mt2032_tuner_ops = …;

// Initialization as described in "MT203x Programming Procedures", Rev 1.2, Feb.2001
static int mt2032_init(struct dvb_frontend *fe)
{ … }

static void mt2050_set_antenna(struct dvb_frontend *fe, unsigned char antenna)
{ … }

static void mt2050_set_if_freq(struct dvb_frontend *fe,unsigned int freq, unsigned int if2)
{ … }

static int mt2050_set_tv_freq(struct dvb_frontend *fe,
			      struct analog_parameters *params)
{ … }

static int mt2050_set_radio_freq(struct dvb_frontend *fe,
				 struct analog_parameters *params)
{ … }

static int mt2050_set_params(struct dvb_frontend *fe,
			     struct analog_parameters *params)
{ … }

static const struct dvb_tuner_ops mt2050_tuner_ops = …;

static int mt2050_init(struct dvb_frontend *fe)
{ … }

struct dvb_frontend *microtune_attach(struct dvb_frontend *fe,
				      struct i2c_adapter* i2c_adap,
				      u8 i2c_addr)
{ … }

EXPORT_SYMBOL_GPL(…);

MODULE_DESCRIPTION(…) …;
MODULE_AUTHOR(…) …;
MODULE_LICENSE(…) …;