path: root/drivers/media/common/tuners/tuner-xc2028.c

/* tuner-xc2028
 *
 * Copyright (c) 2007-2008 Mauro Carvalho Chehab (mchehab@infradead.org)
 *
 * Copyright (c) 2007 Michel Ludwig (michel.ludwig@gmail.com)
 *       - frontend interface
 *
 * This code is placed under the terms of the GNU General Public License v2
 */

#include <linux/i2c.h>
#include <asm/div64.h>
#include <linux/firmware.h>
#include <linux/videodev2.h>
#include <linux/delay.h>
#include <media/tuner.h>
#include <linux/mutex.h>
#include "tuner-i2c.h"
#include "tuner-xc2028.h"
#include "tuner-xc2028-types.h"

#include <linux/dvb/frontend.h>
#include "dvb_frontend.h"


static int debug;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "enable verbose debug messages");

static char audio_std[8];
module_param_string(audio_std, audio_std, sizeof(audio_std), 0);
MODULE_PARM_DESC(audio_std,
	"Audio standard. XC3028 audio decoder explicitly "
	"needs to know what audio\n"
	"standard is needed for some video standards with audio A2 or NICAM.\n"
	"The valid values are:\n"
	"A2\n"
	"A2/A\n"
	"A2/B\n"
	"NICAM\n"
	"NICAM/A\n"
	"NICAM/B\n");

static char firmware_name[FIRMWARE_NAME_MAX];
module_param_string(firmware_name, firmware_name, sizeof(firmware_name), 0);
MODULE_PARM_DESC(firmware_name, "Firmware file name. Allows overriding the "
				"default firmware name\n");

static LIST_HEAD(xc2028_list);
static DEFINE_MUTEX(xc2028_list_mutex);

/* struct for storing firmware table */
struct firmware_description {
	unsigned int  type;
	v4l2_std_id   id;
	__u16         int_freq;
	unsigned char *ptr;
	unsigned int  size;
};

struct firmware_properties {
	unsigned int	type;
	v4l2_std_id	id;
	v4l2_std_id	std_req;
	__u16		int_freq;
	unsigned int	scode_table;
	int 		scode_nr;
};

struct xc2028_data {
	struct list_head        xc2028_list;
	struct tuner_i2c_props  i2c_props;
	int                     (*tuner_callback) (void *dev,
						   int command, int arg);
	void			*video_dev;
	int			count;
	__u32			frequency;

	struct firmware_description *firm;
	int			firm_size;
	__u16			firm_version;

	__u16			hwmodel;
	__u16			hwvers;

	struct xc2028_ctrl	ctrl;

	struct firmware_properties cur_fw;

	struct mutex lock;
};

#define i2c_send(priv, buf, size) ({					\
	int _rc;							\
	_rc = tuner_i2c_xfer_send(&priv->i2c_props, buf, size);		\
	if (size != _rc)						\
		tuner_info("i2c output error: rc = %d (should be %d)\n",\
			   _rc, (int)size);				\
	_rc;								\
})

#define i2c_rcv(priv, buf, size) ({					\
	int _rc;							\
	_rc = tuner_i2c_xfer_recv(&priv->i2c_props, buf, size);		\
	if (size != _rc)						\
		tuner_err("i2c input error: rc = %d (should be %d)\n",	\
			   _rc, (int)size); 				\
	_rc;								\
})

#define i2c_send_recv(priv, obuf, osize, ibuf, isize) ({		\
	int _rc;							\
	_rc = tuner_i2c_xfer_send_recv(&priv->i2c_props, obuf, osize,	\
				       ibuf, isize);			\
	if (isize != _rc)						\
		tuner_err("i2c input error: rc = %d (should be %d)\n",	\
			   _rc, (int)isize); 				\
	_rc;								\
})

#define send_seq(priv, data...)	({					\
	static u8 _val[] = data;					\
	int _rc;							\
	if (sizeof(_val) !=						\
			(_rc = tuner_i2c_xfer_send(&priv->i2c_props,	\
						_val, sizeof(_val)))) {	\
		tuner_err("Error on line %d: %d\n", __LINE__, _rc);	\
	} else 								\
		msleep(10);						\
	_rc;								\
})

static int xc2028_get_reg(struct xc2028_data *priv, u16 reg, u16 *val)
{
	unsigned char buf[2];
	unsigned char ibuf[2];

	tuner_dbg("%s %04x called\n", __func__,