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 ?÷     /*
 * dvb_frontend.h
 *
 * The Digital TV Frontend kABI defines a driver-internal interface for
 * registering low-level, hardware specific driver to a hardware independent
 * frontend layer.
 *
 * Copyright (C) 2001 convergence integrated media GmbH
 * Copyright (C) 2004 convergence GmbH
 *
 * Written by Ralph Metzler
 * Overhauled by Holger Waechtler
 * Kernel I2C stuff by Michael Hunold <hunold@convergence.de>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public License
 * as published by the Free Software Foundation; either version 2.1
 * 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 Lesser General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 */

#ifndef _DVB_FRONTEND_H_
#define _DVB_FRONTEND_H_

#include <linux/types.h>
#include <linux/sched.h>
#include <linux/ioctl.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/delay.h>
#include <linux/mutex.h>
#include <linux/slab.h>
#include <linux/bitops.h>

#include <linux/dvb/frontend.h>

#include <media/dvbdev.h>

/*
 * Maximum number of Delivery systems per frontend. It
 * should be smaller or equal to 32
 */
#define MAX_DELSYS	8

/* Helper definitions to be used at frontend drivers */
#define kHz 1000UL
#define MHz 1000000UL

/**
 * struct dvb_frontend_tune_settings - parameters to adjust frontend tuning
 *
 * @min_delay_ms:	minimum delay for tuning, in ms
 * @step_size:		step size between two consecutive frequencies
 * @max_drift:		maximum drift
 *
 * NOTE: step_size is in Hz, for terrestrial/cable or kHz for satellite
 */
struct dvb_frontend_tune_settings {
	int min_delay_ms;
	int step_size;
	int max_drift;
};

struct dvb_frontend;

/**
 * struct dvb_tuner_info - Frontend name and min/max ranges/bandwidths
 *
 * @name:		name of the Frontend
 * @frequency_min_hz:	minimal frequency supported in Hz
 * @frequency_max_hz:	maximum frequency supported in Hz
 * @frequency_step_hz:	frequency step in Hz
 * @bandwidth_min:	minimal frontend bandwidth supported
 * @bandwidth_max:	maximum frontend bandwidth supported
 * @bandwidth_step:	frontend bandwidth step
 */
struct dvb_tuner_info {
	char name[128];

	u32 frequency_min_hz;
	u32 frequency_max_hz;
	u32 frequency_step_hz;

	u32 bandwidth_min;
	u32 bandwidth_max;
	u32 bandwidth_step;
};

/**
 * struct analog_parameters - Parameters to tune into an analog/radio channel
 *
 * @frequency:	Frequency used by analog TV tuner (either in 62.5 kHz step,
 *		for TV, or 62.5 Hz for radio)
 * @mode:	Tuner mode, as defined on enum v4l2_tuner_type
 * @audmode:	Audio mode as defined for the rxsubchans field at videodev2.h,
 *		e. g. V4L2_TUNER_MODE_*
 * @std:	TV standard bitmap as defined at videodev2.h, e. g. V4L2_STD_*
 *
 * Hybrid tuners should be supported by both V4L2 and DVB APIs. This
 * struct contains the data that are used by the V4L2 side. To avoid
 * dependencies from V4L2 headers, all enums here are declared as integers.
 */
struct analog_parameters {
	unsigned int frequency;
	unsigned int mode;
	unsigned int audmode;
	u64 std;
};

/**
 * enum dvbfe_algo - defines the algorithm used to tune into a channel
 *
 * @DVBFE_ALGO_HW: Hardware Algorithm -
 *	Devices that support this algorithm do everything in hardware
 *	and no software support is needed to handle them.
 *	Requesting these devices to LOCK is the only thing required,
 *	device is supposed to do everything in the hardware.
 *
 * @DVBFE_ALGO_SW: Software Algorithm -
 * These are dumb devices, that require software to do everything
 *
 * @DVBFE_ALGO_CUSTOM: Customizable Agorithm -
 *	Devices having this algorithm can be customized