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
43 * struct dvb_ca_en50221- Structure describing a CA interface
45 * @owner: the module owning this structure
46 * @read_attribute_mem: function for reading attribute memory on the CAM
47 * @write_attribute_mem: function for writing attribute memory on the CAM
48 * @read_cam_control: function for reading the control interface on the CAM
49 * @write_cam_control: function for reading the control interface on the CAM
50 * @slot_reset: function to reset the CAM slot
51 * @slot_shutdown: function to shutdown a CAM slot
52 * @slot_ts_enable: function to enable the Transport Stream on a CAM slot
53 * @poll_slot_status: function to poll slot status. Only necessary if
54 * DVB_CA_FLAG_EN50221_IRQ_CAMCHANGE is not set.
55 * @data: private data, used by caller.
56 * @private: Opaque data used by the dvb_ca core. Do not modify!
58 * NOTE: the read_*, write_* and poll_slot_status functions will be
59 * called for different slots concurrently and need to use locks where
60 * and if appropriate. There will be no concurrent access to one slot.
62 struct dvb_ca_en50221 {
66 int (*write_attribute_mem)(struct dvb_ca_en50221* ca, int slot, int address, u8 value);
68 int (*read_cam_control)(struct dvb_ca_en50221* ca, int slot, u8 address);
69 int (*write_cam_control)(struct dvb_ca_en50221* ca, int slot, u8 address, u8 value);
71 int (*slot_reset)(struct dvb_ca_en50221* ca, int slot);
72 int (*slot_shutdown)(struct dvb_ca_en50221* ca, int slot);
73 int (*slot_ts_enable)(struct dvb_ca_en50221* ca, int slot);
75 int (*poll_slot_status)(struct dvb_ca_en50221* ca, int slot, int open);
85 /* ******************************************************************************** */
86 /* Functions for reporting IRQ events */
89 * dvb_ca_en50221_camchange_irq - A CAMCHANGE IRQ has occurred.
91 * @pubca: CA instance.
92 * @slot: Slot concerned.
93 * @change_type: One of the DVB_CA_CAMCHANGE_* values
95 void dvb_ca_en50221_camchange_irq(struct dvb_ca_en50221* pubca, int slot, int change_type);
98 * dvb_ca_en50221_camready_irq - A CAMREADY IRQ has occurred.
100 * @pubca: CA instance.
101 * @slot: Slot concerned.
103 void dvb_ca_en50221_camready_irq(struct dvb_ca_en50221* pubca, int slot);
106 * dvb_ca_en50221_frda_irq - An FR or a DA IRQ has occurred.
109 * @slot: Slot concerned.
111 void dvb_ca_en50221_frda_irq(struct dvb_ca_en50221* ca, int slot);
115 /* ******************************************************************************** */
116 /* Initialisation/shutdown functions */
119 * dvb_ca_en50221_init - Initialise a new DVB CA device.
121 * @dvb_adapter: DVB adapter to attach the new CA device to.
122 * @ca: The dvb_ca instance.
123 * @flags: Flags describing the CA device (DVB_CA_EN50221_FLAG_*).
124 * @slot_count: Number of slots supported.
126 * @return 0 on success, nonzero on failure
128 extern int dvb_ca_en50221_init(struct dvb_adapter *dvb_adapter, struct dvb_ca_en50221* ca, int flags, int slot_count);
131 * dvb_ca_en50221_release - Release a DVB CA device.
133 * @ca: The associated dvb_ca instance.
135 extern void dvb_ca_en50221_release(struct dvb_ca_en50221* ca);