path: root/drivers/media/video/tuner-core.c

/*
 * i2c tv tuner chip device driver
 * core core, i.e. kernel interfaces, registering and so on
 *
 * Copyright(c) by Ralph Metzler, Gerd Knorr, Gunther Mayer
 *
 * Copyright(c) 2005-2011 by Mauro Carvalho Chehab
 *	- Added support for a separate Radio tuner
 *	- Major rework and cleanups at the code
 *
 * This driver supports many devices and the idea is to let the driver
 * detect which device is present. So rather than listing all supported
 * devices here, we pretend to support a single, fake device type that will
 * handle both radio and analog TV tuning.
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/poll.h>
#include <linux/i2c.h>
#include <linux/types.h>
#include <linux/init.h>
#include <linux/videodev2.h>
#include <media/tuner.h>
#include <media/tuner-types.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.h>
#include "mt20xx.h"
#include "tda8290.h"
#include "tea5761.h"
#include "tea5767.h"
#include "tuner-xc2028.h"
#include "tuner-simple.h"
#include "tda9887.h"
#include "xc5000.h"
#include "tda18271.h"

#define UNSET (-1U)

#define PREFIX (t->i2c->driver->driver.name)

/*
 * Driver modprobe parameters
 */

/* insmod options used at init time => read/only */
static unsigned int addr;
static unsigned int no_autodetect;
static unsigned int show_i2c;

module_param(addr, int, 0444);
module_param(no_autodetect, int, 0444);
module_param(show_i2c, int, 0444);

/* insmod options used at runtime => read/write */
static int tuner_debug;
static unsigned int tv_range[2] = { 44, 958 };
static unsigned int radio_range[2] = { 65, 108 };
static char pal[] = "--";
static char secam[] = "--";
static char ntsc[] = "-";

module_param_named(debug, tuner_debug, int, 0644);
module_param_array(tv_range, int, NULL, 0644);
module_param_array(radio_range, int, NULL, 0644);
module_param_string(pal, pal, sizeof(pal), 0644);
module_param_string(secam, secam, sizeof(secam), 0644);
module_param_string(ntsc, ntsc, sizeof(ntsc), 0644);

/*
 * Static vars
 */

static LIST_HEAD(tuner_list);
static const struct v4l2_subdev_ops tuner_ops;

/*
 * Debug macros
 */

#define tuner_warn(fmt, arg...) do {			\
	printk(KERN_WARNING "%s %d-%04x: " fmt, PREFIX, \
	       i2c_adapter_id(t->i2c->adapter),		\
	       t->i2c->addr, ##arg);			\
	 } while (0)

#define tuner_info(fmt, arg...) do {			\
	printk(KERN_INFO "%s %d-%04x: " fmt, PREFIX,	\
	       i2c_adapter_id(t->i2c->adapter),		\
	       t->i2c->addr, ##arg);			\
	 } while (0)

#define tuner_err(fmt, arg...) do {			\
	printk(KERN_ERR "%s %d-%04x: " fmt, PREFIX,	\
	       i2c_adapter_id(t->i2c->adapter),		\
	       t->i2c->addr, ##arg);			\
	 } while (0)

#define tuner_dbg(fmt, arg...) do {				\
	if (tuner_debug)					\
		printk(KERN_DEBUG "%s %d-%04x: " fmt, PREFIX,	\
		       i2c_adapter_id(t->i2c->adapter),		\
		       t->i2c->addr, ##arg);			\
	 } while (0)

/*
 * Int