drivers/media/dvb/dvb-core/dvb_ca_en50221.h

   1 /*
   2  * dvb_ca.h: generic DVB functions for EN50221 CA interfaces
   3  *
   4  * Copyright (C) 2004 Andrew de Quincey
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public License
   8  * as published by the Free Software Foundation; either version 2.1
   9  * of the License, or (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  19  */
  20
  21 #ifndef _DVB_CA_EN50221_H_
  22 #define _DVB_CA_EN50221_H_
  23
  24 #include <linux/list.h>
  25 #include <linux/dvb/ca.h>
  26
  27 #include "dvbdev.h"
  28
  29 #define DVB_CA_EN50221_POLL_CAM_PRESENT 1
  30 #define DVB_CA_EN50221_POLL_CAM_CHANGED 2
  31 #define DVB_CA_EN50221_POLL_CAM_READY           4
  32
  33 #define DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE       1
  34 #define DVB_CA_EN50221_FLAG_IRQ_FR              2
  35 #define DVB_CA_EN50221_FLAG_IRQ_DA              4
  36
  37 #define DVB_CA_EN50221_CAMCHANGE_REMOVED                0
  38 #define DVB_CA_EN50221_CAMCHANGE_INSERTED               1
  39
  40
  41
  42 /* Structure describing a CA interface */
  43 struct dvb_ca_en50221 {
  44
  45         /* the module owning this structure */
  46         struct module* owner;
  47
  48         /* NOTE: the read_*, write_* and poll_slot_status functions must use locks as
  49          * they may be called from several threads at once */
  50
  51         /* functions for accessing attribute memory on the CAM */
  52         int (*read_attribute_mem)(struct dvb_ca_en50221* ca, int slot, int address);
  53         int (*write_attribute_mem)(struct dvb_ca_en50221* ca, int slot, int address, u8 value);
  54
  55         /* functions for accessing the control interface on the CAM */
  56         int (*read_cam_control)(struct dvb_ca_en50221* ca, int slot, u8 address);
  57         int (*write_cam_control)(struct dvb_ca_en50221* ca, int slot, u8 address, u8 value);
  58
  59         /* Functions for controlling slots */
  60         int (*slot_reset)(struct dvb_ca_en50221* ca, int slot);
  61         int (*slot_shutdown)(struct dvb_ca_en50221* ca, int slot);
  62         int (*slot_ts_enable)(struct dvb_ca_en50221* ca, int slot);
  63
  64         /*
  65         * Poll slot status.
  66         * Only necessary if DVB_CA_FLAG_EN50221_IRQ_CAMCHANGE is not set
  67         */
  68         int (*poll_slot_status)(struct dvb_ca_en50221* ca, int slot, int open);
  69
  70         /* private data, used by caller */
  71         void* data;
  72
  73         /* Opaque data used by the dvb_ca core. Do not modify! */
  74         void* private;
  75 };
  76
  77
  78
  79
  80 /* ******************************************************************************** */
  81 /* Functions for reporting IRQ events */
  82
  83 /**
  84  * A CAMCHANGE IRQ has occurred.
  85  *
  86  * @param ca CA instance.
  87  * @param slot Slot concerned.
  88  * @param change_type One of the DVB_CA_CAMCHANGE_* values
  89  */
  90 void dvb_ca_en50221_camchange_irq(struct dvb_ca_en50221* pubca, int slot, int change_type);
  91
  92 /**
  93  * A CAMREADY IRQ has occurred.
  94  *
  95  * @param ca CA instance.
  96  * @param slot Slot concerned.
  97  */
  98 void dvb_ca_en50221_camready_irq(struct dvb_ca_en50221* pubca, int slot);
  99
 100 /**
 101  * An FR or a DA IRQ has occurred.
 102  *
 103  * @param ca CA instance.
 104  * @param slot Slot concerned.
 105  */
 106 void dvb_ca_en50221_frda_irq(struct dvb_ca_en50221* ca, int slot);
 107
 108
 109
 110 /* ******************************************************************************** */
 111 /* Initialisation/shutdown functions */
 112
 113 /**
 114  * Initialise a new DVB CA device.
 115  *
 116  * @param dvb_adapter DVB adapter to attach the new CA device to.
 117  * @param ca The dvb_ca instance.
 118  * @param flags Flags describing the CA device (DVB_CA_EN50221_FLAG_*).
 119  * @param slot_count Number of slots supported.
 120  *
 121  * @return 0 on success, nonzero on failure
 122  */
 123 extern int dvb_ca_en50221_init(struct dvb_adapter *dvb_adapter, struct dvb_ca_en50221* ca, int flags, int slot_count);
 124
 125 /**
 126  * Release a DVB CA device.
 127  *
 128  * @param ca The associated dvb_ca instance.
 129  */
 130 extern void dvb_ca_en50221_release(struct dvb_ca_en50221* ca);
 131
 132
 133
 134 #endif