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 "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 * @slot_reset: function to reset the CAM slot 45 * @slot_shutdown: function to shutdown a CAM slot 46 * @slot_ts_enable: function to enable the Transport Stream on a CAM slot 47 * @poll_slot_status: function to poll slot status. Only necessary if 48 * DVB_CA_FLAG_EN50221_IRQ_CAMCHANGE is not set. 49 * @data: private data, used by caller. 50 * @private: Opaque data used by the dvb_ca core. Do not modify! 51 * 52 * NOTE: the read_*, write_* and poll_slot_status functions will be 53 * called for different slots concurrently and need to use locks where 54 * and if appropriate. There will be no concurrent access to one slot. 55 */ 56 struct dvb_ca_en50221 { 57 struct module *owner; 58 59 int (*read_attribute_mem)(struct dvb_ca_en50221 *ca, 60 int slot, int address); 61 int (*write_attribute_mem)(struct dvb_ca_en50221 *ca, 62 int slot, int address, u8 value); 63 64 int (*read_cam_control)(struct dvb_ca_en50221 *ca, 65 int slot, u8 address); 66 int (*write_cam_control)(struct dvb_ca_en50221 *ca, 67 int slot, u8 address, u8 value); 68 69 int (*slot_reset)(struct dvb_ca_en50221 *ca, int slot); 70 int (*slot_shutdown)(struct dvb_ca_en50221 *ca, int slot); 71 int (*slot_ts_enable)(struct dvb_ca_en50221 *ca, int slot); 72 73 int (*poll_slot_status)(struct dvb_ca_en50221 *ca, int slot, int open); 74 75 void *data; 76 77 void *private; 78 }; 79 80 /* 81 * Functions for reporting IRQ events 82 */ 83 84 /** 85 * dvb_ca_en50221_camchange_irq - A CAMCHANGE IRQ has occurred. 86 * 87 * @pubca: CA instance. 88 * @slot: Slot concerned. 89 * @change_type: One of the DVB_CA_CAMCHANGE_* values 90 */ 91 void dvb_ca_en50221_camchange_irq(struct dvb_ca_en50221 *pubca, int slot, 92 int change_type); 93 94 /** 95 * dvb_ca_en50221_camready_irq - A CAMREADY IRQ has occurred. 96 * 97 * @pubca: CA instance. 98 * @slot: Slot concerned. 99 */ 100 void dvb_ca_en50221_camready_irq(struct dvb_ca_en50221 *pubca, int slot); 101 102 /** 103 * dvb_ca_en50221_frda_irq - An FR or a DA IRQ has occurred. 104 * 105 * @ca: CA instance. 106 * @slot: Slot concerned. 107 */ 108 void dvb_ca_en50221_frda_irq(struct dvb_ca_en50221 *ca, int slot); 109 110 /* 111 * Initialisation/shutdown functions 112 */ 113 114 /** 115 * dvb_ca_en50221_init - Initialise a new DVB CA device. 116 * 117 * @dvb_adapter: DVB adapter to attach the new CA device to. 118 * @ca: The dvb_ca instance. 119 * @flags: Flags describing the CA device (DVB_CA_EN50221_FLAG_*). 120 * @slot_count: Number of slots supported. 121 * 122 * @return 0 on success, nonzero on failure 123 */ 124 extern int dvb_ca_en50221_init(struct dvb_adapter *dvb_adapter, 125 struct dvb_ca_en50221 *ca, int flags, 126 int slot_count); 127 128 /** 129 * dvb_ca_en50221_release - Release a DVB CA device. 130 * 131 * @ca: The associated dvb_ca instance. 132 */ 133 extern void dvb_ca_en50221_release(struct dvb_ca_en50221 *ca); 134 135 #endif 136