include/media/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
  17 #ifndef _DVB_CA_EN50221_H_
  18 #define _DVB_CA_EN50221_H_
  19
  20 #include <linux/list.h>
  21 #include <linux/dvb/ca.h>
  22
  23 #include <media/dvbdev.h>
  24
  25 #define DVB_CA_EN50221_POLL_CAM_PRESENT 1
  26 #define DVB_CA_EN50221_POLL_CAM_CHANGED 2
  27 #define DVB_CA_EN50221_POLL_CAM_READY           4
  28
  29 #define DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE       1
  30 #define DVB_CA_EN50221_FLAG_IRQ_FR              2
  31 #define DVB_CA_EN50221_FLAG_IRQ_DA              4
  32
  33 #define DVB_CA_EN50221_CAMCHANGE_REMOVED                0
  34 #define DVB_CA_EN50221_CAMCHANGE_INSERTED               1
  35
  36 /**
  37  * struct dvb_ca_en50221- Structure describing a CA interface
  38  *
  39  * @owner:              the module owning this structure
  40  * @read_attribute_mem: function for reading attribute memory on the CAM
  41  * @write_attribute_mem: function for writing attribute memory on the CAM
  42  * @read_cam_control:   function for reading the control interface on the CAM
  43  * @write_cam_control:  function for reading the control interface on the CAM
  44  * @read_data:          function for reading data (block mode)
  45  * @write_data:         function for writing data (block mode)
  46  * @slot_reset:         function to reset the CAM slot
  47  * @slot_shutdown:      function to shutdown a CAM slot
  48  * @slot_ts_enable:     function to enable the Transport Stream on a CAM slot
  49  * @poll_slot_status:   function to poll slot status. Only necessary if
  50  *                      DVB_CA_FLAG_EN50221_IRQ_CAMCHANGE is not set.
  51  * @data:               private data, used by caller.
  52  * @private:            Opaque data used by the dvb_ca core. Do not modify!
  53  *
  54  * NOTE: the read_*, write_* and poll_slot_status functions will be
  55  * called for different slots concurrently and need to use locks where
  56  * and if appropriate. There will be no concurrent access to one slot.
  57  */
  58 struct dvb_ca_en50221 {
  59         struct module *owner;
  60
  61         int (*read_attribute_mem)(struct dvb_ca_en50221 *ca,
  62                                   int slot, int address);
  63         int (*write_attribute_mem)(struct dvb_ca_en50221 *ca,
  64                                    int slot, int address, u8 value);
  65
  66         int (*read_cam_control)(struct dvb_ca_en50221 *ca,
  67                                 int slot, u8 address);
  68         int (*write_cam_control)(struct dvb_ca_en50221 *ca,
  69                                  int slot, u8 address, u8 value);
  70
  71         int (*read_data)(struct dvb_ca_en50221 *ca,
  72                          int slot, u8 *ebuf, int ecount);
  73         int (*write_data)(struct dvb_ca_en50221 *ca,
  74                           int slot, u8 *ebuf, int ecount);
  75
  76         int (*slot_reset)(struct dvb_ca_en50221 *ca, int slot);
  77         int (*slot_shutdown)(struct dvb_ca_en50221 *ca, int slot);
  78         int (*slot_ts_enable)(struct dvb_ca_en50221 *ca, int slot);
  79
  80         int (*poll_slot_status)(struct dvb_ca_en50221 *ca, int slot, int open);
  81
  82         void *data;
  83
  84         void *private;
  85 };
  86
  87 /*
  88  * Functions for reporting IRQ events
  89  */
  90
  91 /**
  92  * dvb_ca_en50221_camchange_irq - A CAMCHANGE IRQ has occurred.
  93  *
  94  * @pubca: CA instance.
  95  * @slot: Slot concerned.
  96  * @change_type: One of the DVB_CA_CAMCHANGE_* values
  97  */
  98 void dvb_ca_en50221_camchange_irq(struct dvb_ca_en50221 *pubca, int slot,
  99                                   int change_type);
 100
 101 /**
 102  * dvb_ca_en50221_camready_irq - A CAMREADY IRQ has occurred.
 103  *
 104  * @pubca: CA instance.
 105  * @slot: Slot concerned.
 106  */
 107 void dvb_ca_en50221_camready_irq(struct dvb_ca_en50221 *pubca, int slot);
 108
 109 /**
 110  * dvb_ca_en50221_frda_irq - An FR or a DA IRQ has occurred.
 111  *
 112  * @ca: CA instance.
 113  * @slot: Slot concerned.
 114  */
 115 void dvb_ca_en50221_frda_irq(struct dvb_ca_en50221 *ca, int slot);
 116
 117 /*
 118  * Initialisation/shutdown functions
 119  */
 120
 121 /**
 122  * dvb_ca_en50221_init - Initialise a new DVB CA device.
 123  *
 124  * @dvb_adapter: DVB adapter to attach the new CA device to.
 125  * @ca: The dvb_ca instance.
 126  * @flags: Flags describing the CA device (DVB_CA_EN50221_FLAG_*).
 127  * @slot_count: Number of slots supported.
 128  *
 129  * @return 0 on success, nonzero on failure
 130  */
 131 int dvb_ca_en50221_init(struct dvb_adapter *dvb_adapter,
 132                         struct dvb_ca_en50221 *ca, int flags,
 133                                int slot_count);
 134
 135 /**
 136  * dvb_ca_en50221_release - Release a DVB CA device.
 137  *
 138  * @ca: The associated dvb_ca instance.
 139  */
 140 void dvb_ca_en50221_release(struct dvb_ca_en50221 *ca);
 141
 142 #endif