drivers/media/dvb/dvb-core/dvb_frontend.h

   1 /*
   2  * dvb_frontend.h
   3  *
   4  * Copyright (C) 2001 convergence integrated media GmbH
   5  * Copyright (C) 2004 convergence GmbH
   6  *
   7  * Written by Ralph Metzler
   8  * Overhauled by Holger Waechtler
   9  * Kernel I2C stuff by Michael Hunold <hunold@convergence.de>
  10  *
  11  * This program is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU Lesser General Public License
  13  * as published by the Free Software Foundation; either version 2.1
  14  * of the License, or (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21
  22  * You should have received a copy of the GNU Lesser General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  25  *
  26  */
  27
  28 #ifndef _DVB_FRONTEND_H_
  29 #define _DVB_FRONTEND_H_
  30
  31 #include <linux/types.h>
  32 #include <linux/sched.h>
  33 #include <linux/ioctl.h>
  34 #include <linux/i2c.h>
  35 #include <linux/module.h>
  36 #include <linux/errno.h>
  37 #include <linux/delay.h>
  38
  39 #include <linux/dvb/frontend.h>
  40
  41 #include "dvbdev.h"
  42
  43 struct dvb_frontend_tune_settings {
  44         int min_delay_ms;
  45         int step_size;
  46         int max_drift;
  47         struct dvb_frontend_parameters parameters;
  48 };
  49
  50 struct dvb_frontend;
  51
  52 struct dvb_tuner_info {
  53         char name[128];
  54
  55         u32 frequency_min;
  56         u32 frequency_max;
  57         u32 frequency_step;
  58
  59         u32 bandwidth_min;
  60         u32 bandwidth_max;
  61         u32 bandwidth_step;
  62 };
  63
  64 struct dvb_tuner_ops {
  65
  66         struct dvb_tuner_info info;
  67
  68         int (*release)(struct dvb_frontend *fe);
  69         int (*init)(struct dvb_frontend *fe);
  70         int (*sleep)(struct dvb_frontend *fe);
  71
  72         /** This is for simple PLLs - set all parameters in one go. */
  73         int (*set_params)(struct dvb_frontend *fe, struct dvb_frontend_parameters *p);
  74
  75         /** This is support for demods like the mt352 - fills out the supplied buffer with what to write. */
  76         int (*calc_regs)(struct dvb_frontend *fe, struct dvb_frontend_parameters *p, u8 *buf, int buf_len);
  77
  78         int (*get_frequency)(struct dvb_frontend *fe, u32 *frequency);
  79         int (*get_bandwidth)(struct dvb_frontend *fe, u32 *bandwidth);
  80
  81 #define TUNER_STATUS_LOCKED 1
  82         int (*get_status)(struct dvb_frontend *fe, u32 *status);
  83
  84         /** These are provided seperately from set_params in order to facilitate silicon
  85          * tuners which require sophisticated tuning loops, controlling each parameter seperately. */
  86         int (*set_frequency)(struct dvb_frontend *fe, u32 frequency);
  87         int (*set_bandwidth)(struct dvb_frontend *fe, u32 bandwidth);
  88 };
  89
  90 struct dvb_frontend_ops {
  91
  92         struct dvb_frontend_info info;
  93
  94         void (*release)(struct dvb_frontend* fe);
  95
  96         int (*init)(struct dvb_frontend* fe);
  97         int (*sleep)(struct dvb_frontend* fe);
  98
  99         /* if this is set, it overrides the default swzigzag */
 100         int (*tune)(struct dvb_frontend* fe,
 101                     struct dvb_frontend_parameters* params,
 102                     unsigned int mode_flags,
 103                     int *delay,
 104                     fe_status_t *status);
 105
 106         /* these two are only used for the swzigzag code */
 107         int (*set_frontend)(struct dvb_frontend* fe, struct dvb_frontend_parameters* params);
 108         int (*get_tune_settings)(struct dvb_frontend* fe, struct dvb_frontend_tune_settings* settings);
 109
 110         int (*get_frontend)(struct dvb_frontend* fe, struct dvb_frontend_parameters* params);
 111
 112         int (*read_status)(struct dvb_frontend* fe, fe_status_t* status);
 113         int (*read_ber)(struct dvb_frontend* fe, u32* ber);
 114         int (*read_signal_strength)(struct dvb_frontend* fe, u16* strength);
 115         int (*read_snr)(struct dvb_frontend* fe, u16* snr);
 116         int (*read_ucblocks)(struct dvb_frontend* fe, u32* ucblocks);
 117
 118         int (*diseqc_reset_overload)(struct dvb_frontend* fe);
 119         int (*diseqc_send_master_cmd)(struct dvb_frontend* fe, struct dvb_diseqc_master_cmd* cmd);
 120         int (*diseqc_recv_slave_reply)(struct dvb_frontend* fe, struct dvb_diseqc_slave_reply* reply);
 121         int (*diseqc_send_burst)(struct dvb_frontend* fe, fe_sec_mini_cmd_t minicmd);
 122         int (*set_tone)(struct dvb_frontend* fe, fe_sec_tone_mode_t tone);
 123         int (*set_voltage)(struct dvb_frontend* fe, fe_sec_voltage_t voltage);
 124         int (*enable_high_lnb_voltage)(struct dvb_frontend* fe, long arg);
 125         int (*dishnetwork_send_legacy_command)(struct dvb_frontend* fe, unsigned long cmd);
 126         int (*i2c_gate_ctrl)(struct dvb_frontend* fe, int enable);
 127
 128         struct dvb_tuner_ops tuner_ops;
 129 };
 130
 131 #define MAX_EVENT 8
 132
 133 struct dvb_fe_events {
 134         struct dvb_frontend_event events[MAX_EVENT];
 135         int                       eventw;
 136         int                       eventr;
 137         int                       overflow;
 138         wait_queue_head_t         wait_queue;
 139         struct semaphore          sem;
 140 };
 141
 142 struct dvb_frontend {
 143         struct dvb_frontend_ops ops;
 144         struct dvb_adapter *dvb;
 145         void* demodulator_priv;
 146         void* tuner_priv;
 147         void* frontend_priv;
 148         void* misc_priv;
 149 };
 150
 151 extern int dvb_register_frontend(struct dvb_adapter* dvb,
 152                                  struct dvb_frontend* fe);
 153
 154 extern int dvb_unregister_frontend(struct dvb_frontend* fe);
 155
 156 extern void dvb_frontend_reinitialise(struct dvb_frontend *fe);
 157
 158 extern void dvb_frontend_sleep_until(struct timeval *waketime, u32 add_usec);
 159 extern s32 timeval_usec_diff(struct timeval lasttime, struct timeval curtime);
 160
 161 #endif