/*
 * dvb_frontend.h
 *
 * 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/dvb/frontend.h>

#include "dvbdev.h"

struct dvb_frontend_tune_settings {
        int min_delay_ms;
        int step_size;
        int max_drift;
        struct dvb_frontend_parameters parameters;
};

struct dvb_frontend;

struct dvb_tuner_info {
        char name[128];

        u32 frequency_min;
        u32 frequency_max;
        u32 frequency_step;

        u32 bandwidth_min;
        u32 bandwidth_max;
        u32 bandwidth_step;
};

struct analog_parameters {
        unsigned int frequency;
        unsigned int mode;
        unsigned int audmode;
        u64 std;
};

enum dvbfe_modcod {
        DVBFE_MODCOD_DUMMY_PLFRAME      = 0,
        DVBFE_MODCOD_QPSK_1_4,
        DVBFE_MODCOD_QPSK_1_3,
        DVBFE_MODCOD_QPSK_2_5,
        DVBFE_MODCOD_QPSK_1_2,
        DVBFE_MODCOD_QPSK_3_5,
        DVBFE_MODCOD_QPSK_2_3,
        DVBFE_MODCOD_QPSK_3_4,
        DVBFE_MODCOD_QPSK_4_5,
        DVBFE_MODCOD_QPSK_5_6,
        DVBFE_MODCOD_QPSK_8_9,
        DVBFE_MODCOD_QPSK_9_10,
        DVBFE_MODCOD_8PSK_3_5,
        DVBFE_MODCOD_8PSK_2_3,
        DVBFE_MODCOD_8PSK_3_4,
        DVBFE_MODCOD_8PSK_5_6,
        DVBFE_MODCOD_8PSK_8_9,
        DVBFE_MODCOD_8PSK_9_10,
        DVBFE_MODCOD_16APSK_2_3,
        DVBFE_MODCOD_16APSK_3_4,
        DVBFE_MODCOD_16APSK_4_5,
        DVBFE_MODCOD_16APSK_5_6,
        DVBFE_MODCOD_16APSK_8_9,
        DVBFE_MODCOD_16APSK_9_10,
        DVBFE_MODCOD_32APSK_3_4,
        DVBFE_MODCOD_32APSK_4_5,
        DVBFE_MODCOD_32APSK_5_6,
        DVBFE_MODCOD_32APSK_8_9,
        DVBFE_MODCOD_32APSK_9_10,
        DVBFE_MODCOD_RESERVED_1,
        DVBFE_MODCOD_BPSK_1_3,
        DVBFE_MODCOD_BPSK_1_4,
        DVBFE_MODCOD_RESERVED_2
};

enum tuner_param {
        DVBFE_TUNER_FREQUENCY           = (1 <<  0),
        DVBFE_TUNER_TUNERSTEP           = (1 <<  1),
        DVBFE_TUNER_IFFREQ              = (1 <<  2),
        DVBFE_TUNER_BANDWIDTH           = (1 <<  3),
        DVBFE_TUNER_REFCLOCK            = (1 <<  4),
        DVBFE_TUNER_IQSENSE             = (1 <<  5),
        DVBFE_TUNER_DUMMY               = (1 << 31)
};

/*
 * 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.
 *
 * ALGO_SW: (Software Algorithm)
 * ----------------------------------------------------------------
 * These are dumb devices, that require software to do everything
 *
 * ALGO_CUSTOM: (Customizable Agorithm)
 * ----------------------------------------------------------------
 * Devices having this algorithm can be customized to have specific
 * algorithms in the frontend driver, rather than simply doing a
 * software zig-zag. In this case the zigzag maybe hardware assisted
 * or it maybe completely done in hardware. In all cases, usage of
 * this algorithm, in conjunction with the search and track
 * callbacks, utilizes the driver specific algorithm.
 *
 * ALGO_RECOVERY: (Recovery Algorithm)
 * ----------------------------------------------------------------
 * These devices have AUTO recovery capabilities from LOCK failure
 */
enum dvbfe_algo {
        DVBFE_ALGO_HW                   = (1 <<  0),
        DVBFE_ALGO_SW                   = (1 <<  1),
        DVBFE_ALGO_CUSTOM               = (1 <<  2),
        DVBFE_ALGO_RECOVERY             = (1 << 31)
};

struct tuner_state {
        u32 frequency;
        u32 tunerstep;
        u32 ifreq;
        u32 bandwidth;
        u32 iqsense;
        u32 refclock;
};

/*
 * search callback possible return status
 *
 * DVBFE_ALGO_SEARCH_SUCCESS
 * The frontend search algorithm completed and returned succesfully
 *
 * DVBFE_ALGO_SEARCH_ASLEEP
 * The frontend search algorithm is sleeping
 *
 * DVBFE_ALGO_SEARCH_FAILED
 * The frontend search for a signal failed
 *
 * DVBFE_ALGO_SEARCH_INVALID
 * The frontend search algorith was probably supplied with invalid
 * parameters and the search is an invalid one
 *
 * DVBFE_ALGO_SEARCH_ERROR
 * The frontend search algorithm failed due to some error
 *
 * DVBFE_ALGO_SEARCH_AGAIN
 * The frontend search algorithm was requested to search again
 */
enum dvbfe_search {
        DVBFE_ALGO_SEARCH_SUCCESS       = (1 <<  0),
        DVBFE_ALGO_SEARCH_ASLEEP        = (1 <<  1),
        DVBFE_ALGO_SEARCH_FAILED        = (1 <<  2),
        DVBFE_ALGO_SEARCH_INVALID       = (1 <<  3),
        DVBFE_ALGO_SEARCH_AGAIN         = (1 <<  4),
        DVBFE_ALGO_SEARCH_ERROR         = (1 << 31),
};


struct dvb_tuner_ops {

        struct dvb_tuner_info info;

        int (*release)(struct dvb_frontend *fe);
        int (*init)(struct dvb_frontend *fe);
        int (*sleep)(struct dvb_frontend *fe);

        /** This is for simple PLLs - set all parameters in one go. */
        int (*set_params)(struct dvb_frontend *fe, struct dvb_frontend_parameters *p);
        int (*set_analog_params)(struct dvb_frontend *fe, struct analog_parameters *p);

        /** This is support for demods like the mt352 - fills out the supplied buffer with what to write. */
        int (*calc_regs)(struct dvb_frontend *fe, struct dvb_frontend_parameters *p, u8 *buf, int buf_len);

        /** This is to allow setting tuner-specific configs */
        int (*set_config)(struct dvb_frontend *fe, void *priv_cfg);

        int (*get_frequency)(struct dvb_frontend *fe, u32 *frequency);
        int (*get_bandwidth)(struct dvb_frontend *fe, u32 *bandwidth);

#define TUNER_STATUS_LOCKED 1
#define TUNER_STATUS_STEREO 2
        int (*get_status)(struct dvb_frontend *fe, u32 *status);
        int (*get_rf_strength)(struct dvb_frontend *fe, u16 *strength);

        /** These are provided seperately from set_params in order to facilitate silicon
         * tuners which require sophisticated tuning loops, controlling each parameter seperately. */
        int (*set_frequency)(struct dvb_frontend *fe, u32 frequency);
        int (*set_bandwidth)(struct dvb_frontend *fe, u32 bandwidth);

        /*
         * These are provided seperately from set_params in order to facilitate silicon
         * tuners which require sophisticated tuning loops, controlling each parameter seperately.
         */
        int (*set_state)(struct dvb_frontend *fe, enum tuner_param param, struct tuner_state *state);
        int (*get_state)(struct dvb_frontend *fe, enum tuner_param param, struct tuner_state *state);
};

struct analog_demod_info {
        char *name;
};

struct analog_demod_ops {

        struct analog_demod_info info;

        void (*set_params)(struct dvb_frontend *fe,
                           struct analog_parameters *params);
        int  (*has_signal)(struct dvb_frontend *fe);
        int  (*is_stereo)(struct dvb_frontend *fe);
        int  (*get_afc)(struct dvb_frontend *fe);
        void (*tuner_status)(struct dvb_frontend *fe);
        void (*standby)(struct dvb_frontend *fe);
        void (*release)(struct dvb_frontend *fe);
        int  (*i2c_gate_ctrl)(struct dvb_frontend *fe, int enable);

        /** This is to allow setting tuner-specific configuration */
        int (*set_config)(struct dvb_frontend *fe, void *priv_cfg);
};

struct dvb_frontend_ops {

        struct dvb_frontend_info info;

        void (*release)(struct dvb_frontend* fe);
        void (*release_sec)(struct dvb_frontend* fe);

        int (*init)(struct dvb_frontend* fe);
        int (*sleep)(struct dvb_frontend* fe);

        int (*write)(struct dvb_frontend* fe, u8* buf, int len);

        /* if this is set, it overrides the default swzigzag */
        int (*tune)(struct dvb_frontend* fe,
                    struct dvb_frontend_parameters* params,
                    unsigned int mode_flags,
                    unsigned int *delay,
                    fe_status_t *status);
        /* get frontend tuning algorithm from the module */
        enum dvbfe_algo (*get_frontend_algo)(struct dvb_frontend *fe);

        /* these two are only used for the swzigzag code */
        int (*set_frontend)(struct dvb_frontend* fe, struct dvb_frontend_parameters* params);
        int (*get_tune_settings)(struct dvb_frontend* fe, struct dvb_frontend_tune_settings* settings);

        int (*get_frontend)(struct dvb_frontend* fe, struct dvb_frontend_parameters* params);

        int (*read_status)(struct dvb_frontend* fe, fe_status_t* status);
        int (*read_ber)(struct dvb_frontend* fe, u32* ber);
        int (*read_signal_strength)(struct dvb_frontend* fe, u16* strength);
        int (*read_snr)(struct dvb_frontend* fe, u16* snr);
        int (*read_ucblocks)(struct dvb_frontend* fe, u32* ucblocks);

        int (*diseqc_reset_overload)(struct dvb_frontend* fe);
        int (*diseqc_send_master_cmd)(struct dvb_frontend* fe, struct dvb_diseqc_master_cmd* cmd);
        int (*diseqc_recv_slave_reply)(struct dvb_frontend* fe, struct dvb_diseqc_slave_reply* reply);
        int (*diseqc_send_burst)(struct dvb_frontend* fe, fe_sec_mini_cmd_t minicmd);
        int (*set_tone)(struct dvb_frontend* fe, fe_sec_tone_mode_t tone);
        int (*set_voltage)(struct dvb_frontend* fe, fe_sec_voltage_t voltage);
        int (*enable_high_lnb_voltage)(struct dvb_frontend* fe, long arg);
        int (*dishnetwork_send_legacy_command)(struct dvb_frontend* fe, unsigned long cmd);
        int (*i2c_gate_ctrl)(struct dvb_frontend* fe, int enable);
        int (*ts_bus_ctrl)(struct dvb_frontend* fe, int acquire);

        /* These callbacks are for devices that implement their own
         * tuning algorithms, rather than a simple swzigzag
         */
        enum dvbfe_search (*search)(struct dvb_frontend *fe, struct dvb_frontend_parameters *p);
        int (*track)(struct dvb_frontend *fe, struct dvb_frontend_parameters *p);

        struct dvb_tuner_ops tuner_ops;
        struct analog_demod_ops analog_ops;

        int (*set_property)(struct dvb_frontend* fe, struct dtv_property* tvp);
        int (*get_property)(struct dvb_frontend* fe, struct dtv_property* tvp);
};

#define MAX_EVENT 8

struct dvb_fe_events {
        struct dvb_frontend_event events[MAX_EVENT];
        int                       eventw;
        int                       eventr;
        int                       overflow;
        wait_queue_head_t         wait_queue;
        struct mutex              mtx;
};

struct dtv_frontend_properties {

        /* Cache State */
        u32                     state;

        u32                     frequency;
        fe_modulation_t         modulation;

        fe_sec_voltage_t        voltage;
        fe_sec_tone_mode_t      sectone;
        fe_spectral_inversion_t inversion;
        fe_code_rate_t          fec_inner;
        fe_transmit_mode_t      transmission_mode;
        u32                     bandwidth_hz;   /* 0 = AUTO */
        fe_guard_interval_t     guard_interval;
        fe_hierarchy_t          hierarchy;
        u32                     symbol_rate;
        fe_code_rate_t          code_rate_HP;
        fe_code_rate_t          code_rate_LP;

        fe_pilot_t              pilot;
        fe_rolloff_t            rolloff;

        fe_delivery_system_t    delivery_system;

        /* ISDB-T specifics */
        u8                      isdbt_partial_reception;
        u8                      isdbt_sb_mode;
        u8                      isdbt_sb_subchannel;
        u32                     isdbt_sb_segment_idx;
        u32                     isdbt_sb_segment_count;
        u8                      isdbt_layer_enabled;
        struct {
            u8                  segment_count;
            fe_code_rate_t      fec;
            fe_modulation_t     modulation;
            u8                  interleaving;
        } layer[3];

        /* ISDB-T specifics */
        u32                     isdbs_ts_id;
};

struct dvb_frontend {
        struct dvb_frontend_ops ops;
        struct dvb_adapter *dvb;
        void *demodulator_priv;
        void *tuner_priv;
        void *frontend_priv;
        void *sec_priv;
        void *analog_demod_priv;
        struct dtv_frontend_properties dtv_property_cache;
#define DVB_FRONTEND_COMPONENT_TUNER 0
        int (*callback)(void *adapter_priv, int component, int cmd, int arg);
        int id;
};

extern int dvb_register_frontend(struct dvb_adapter *dvb,
                                 struct dvb_frontend *fe);

extern int dvb_unregister_frontend(struct dvb_frontend *fe);

extern void dvb_frontend_detach(struct dvb_frontend *fe);

extern void dvb_frontend_reinitialise(struct dvb_frontend *fe);

extern void dvb_frontend_sleep_until(struct timeval *waketime, u32 add_usec);
extern s32 timeval_usec_diff(struct timeval lasttime, struct timeval curtime);

#endif