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 143