2 * dvb_ca.h: generic DVB functions for EN50221 CA interfaces
4 * Copyright (C) 2004 Andrew de Quincey
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.
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.
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.
21 #ifndef _DVB_CA_EN50221_H_
22 #define _DVB_CA_EN50221_H_
24 #include <linux/list.h>
25 #include <linux/dvb/ca.h>
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
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
37 #define DVB_CA_EN50221_CAMCHANGE_REMOVED 0
38 #define DVB_CA_EN50221_CAMCHANGE_INSERTED 1
42 /* Structure describing a CA interface */
43 struct dvb_ca_en50221 {
45 /* the module owning this structure */
48 /* NOTE: the read_*, write_* and poll_slot_status functions must use locks as
49 * they may be called from several threads at once */
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);
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);
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);
66 * Only necessary if DVB_CA_FLAG_EN50221_IRQ_CAMCHANGE is not set
68 int (*poll_slot_status)(struct dvb_ca_en50221* ca, int slot, int open);
70 /* private data, used by caller */
73 /* Opaque data used by the dvb_ca core. Do not modify! */
80 /* ******************************************************************************** */
81 /* Functions for reporting IRQ events */
84 * A CAMCHANGE IRQ has occurred.
86 * @param ca CA instance.
87 * @param slot Slot concerned.
88 * @param change_type One of the DVB_CA_CAMCHANGE_* values
90 void dvb_ca_en50221_camchange_irq(struct dvb_ca_en50221* pubca, int slot, int change_type);
93 * A CAMREADY IRQ has occurred.
95 * @param ca CA instance.
96 * @param slot Slot concerned.
98 void dvb_ca_en50221_camready_irq(struct dvb_ca_en50221* pubca, int slot);
101 * An FR or a DA IRQ has occurred.
103 * @param ca CA instance.
104 * @param slot Slot concerned.
106 void dvb_ca_en50221_frda_irq(struct dvb_ca_en50221* ca, int slot);
110 /* ******************************************************************************** */
111 /* Initialisation/shutdown functions */
114 * Initialise a new DVB CA device.
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.
121 * @return 0 on success, nonzero on failure
123 extern int dvb_ca_en50221_init(struct dvb_adapter *dvb_adapter, struct dvb_ca_en50221* ca, int flags, int slot_count);
126 * Release a DVB CA device.
128 * @param ca The associated dvb_ca instance.
130 extern void dvb_ca_en50221_release(struct dvb_ca_en50221* ca);