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