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

/*
 *
 * i2c tv tuner chip device driver
 * core core, i.e. kernel interfaces, registering and so on
 */

#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 <media/v4l2-i2c-drv.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"

#define UNSET (-1U)

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

/** This macro allows us to probe dynamically, avoiding static links */
#ifdef CONFIG_MEDIA_ATTACH
#define tuner_symbol_probe(FUNCTION, ARGS...) ({ \
	int __r = -EINVAL; \
	typeof(&FUNCTION) __a = symbol_request(FUNCTION); \
	if (__a) { \
		__r = (int) __a(ARGS); \
		symbol_put(FUNCTION); \
	} else { \
		printk(KERN_ERR "TUNER: Unable to find " \
				"symbol "#FUNCTION"()\n"); \
	} \
	__r; \
})

static void tuner_detach(struct dvb_frontend *fe)
{
	if (fe->ops.tuner_ops.release) {
		fe->ops.tuner_ops.release(fe);
		symbol_put_addr(fe->ops.tuner_ops.release);
	}
	if (fe->ops.analog_ops.release) {
		fe->ops.analog_ops.release(fe);
		symbol_put_addr(fe->ops.analog_ops.release);
	}
}
#else
#define tuner_symbol_probe(FUNCTION, ARGS...) ({ \
	FUNCTION(ARGS); \
})

static void tuner_detach(struct dvb_frontend *fe)
{
	if (fe->ops.tuner_ops.release)
		fe->ops.tuner_ops.release(fe);
	if (fe->ops.analog_ops.release)
		fe->ops.analog_ops.release(fe);
}
#endif

struct tuner {
	/* device */
	struct dvb_frontend fe;
	struct i2c_client   *i2c;
	struct v4l2_subdev  sd;
	struct list_head    list;
	unsigned int        using_v4l2:1;

	/* keep track of the current settings */
	v4l2_std_id         std;
	unsigned int        tv_freq;
	unsigned int        radio_freq;
	unsigned int        audmode;

	unsigned int        mode;
	unsigned int        mode_mask; /* Combination of allowable modes */

	unsigned int        type; /* chip type id */
	unsigned int        config;
	const char          *name;
};

static inline struct tuner *to_tuner(struct v4l2_subdev *sd)
{
	return container_of(sd, struct tuner, sd);
}


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

/* insmod options used at runtime => read/write */
static int tuner_debug;

#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)

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

static unsigned int tv_range[2] = { 44, 958 };
static unsigned int radio_range[2] = {