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_frontend_ops {
  53
  54         struct dvb_frontend_info info;
  55
  56         void (*release)(struct dvb_frontend* fe);
  57
  58         int (*init)(struct dvb_frontend* fe);
  59         int (*sleep)(struct dvb_frontend* fe);
  60
  61         /* if this is set, it overrides the default swzigzag */
  62         int (*tune)(struct dvb_frontend* fe,
  63                     struct dvb_frontend_parameters* params,
  64                     unsigned int mode_flags,
  65                     int *delay,
  66                     fe_status_t *status);
  67
  68         /* these two are only used for the swzigzag code */
  69         int (*set_frontend)(struct dvb_frontend* fe, struct dvb_frontend_parameters* params);
  70         int (*get_tune_settings)(struct dvb_frontend* fe, struct dvb_frontend_tune_settings* settings);
  71
  72         int (*get_frontend)(struct dvb_frontend* fe, struct dvb_frontend_parameters* params);
  73
  74         int (*read_status)(struct dvb_frontend* fe, fe_status_t* status);
  75         int (*read_ber)(struct dvb_frontend* fe, u32* ber);
  76         int (*read_signal_strength)(struct dvb_frontend* fe, u16* strength);
  77         int (*read_snr)(struct dvb_frontend* fe, u16* snr);
  78         int (*read_ucblocks)(struct dvb_frontend* fe, u32* ucblocks);
  79
  80         int (*diseqc_reset_overload)(struct dvb_frontend* fe);
  81         int (*diseqc_send_master_cmd)(struct dvb_frontend* fe, struct dvb_diseqc_master_cmd* cmd);
  82         int (*diseqc_recv_slave_reply)(struct dvb_frontend* fe, struct dvb_diseqc_slave_reply* reply);
  83         int (*diseqc_send_burst)(struct dvb_frontend* fe, fe_sec_mini_cmd_t minicmd);
  84         int (*set_tone)(struct dvb_frontend* fe, fe_sec_tone_mode_t tone);
  85         int (*set_voltage)(struct dvb_frontend* fe, fe_sec_voltage_t voltage);
  86         int (*enable_high_lnb_voltage)(struct dvb_frontend* fe, long arg);
  87         int (*dishnetwork_send_legacy_command)(struct dvb_frontend* fe, unsigned long cmd);
  88         int (*i2c_gate_ctrl)(struct dvb_frontend* fe, int enable);
  89 };
  90
  91 #define MAX_EVENT 8
  92
  93 struct dvb_fe_events {
  94         struct dvb_frontend_event events[MAX_EVENT];
  95         int                       eventw;
  96         int                       eventr;
  97         int                       overflow;
  98         wait_queue_head_t         wait_queue;
  99         struct semaphore          sem;
 100 };
 101
 102 struct dvb_frontend {
 103         struct dvb_frontend_ops* ops;
 104         struct dvb_adapter *dvb;
 105         void* demodulator_priv;
 106         void* frontend_priv;
 107 };
 108
 109 extern int dvb_register_frontend(struct dvb_adapter* dvb,
 110                                  struct dvb_frontend* fe);
 111
 112 extern int dvb_unregister_frontend(struct dvb_frontend* fe);
 113
 114 extern void dvb_frontend_sleep_until(struct timeval *waketime, u32 add_usec);
 115 extern s32 timeval_usec_diff(struct timeval lasttime, struct timeval curtime);
 116
 117 #endif