1/*
2 * dvbdev.h
3 *
4 * Copyright (C) 2000 Ralph Metzler & Marcus Metzler
5 *                    for convergence integrated media GmbH
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Lesser Public License
9 * as published by the Free Software Foundation; either version 2.1
10 * of the License, or (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
20 *
21 */
22
23#ifndef _DVBDEV_H_
24#define _DVBDEV_H_
25
26#include <linux/types.h>
27#include <linux/poll.h>
28#include <linux/fs.h>
29#include <linux/list.h>
30#include <media/media-device.h>
31
32#define DVB_MAJOR 212
33
34#if defined(CONFIG_DVB_MAX_ADAPTERS) && CONFIG_DVB_MAX_ADAPTERS > 0
35  #define DVB_MAX_ADAPTERS CONFIG_DVB_MAX_ADAPTERS
36#else
37  #define DVB_MAX_ADAPTERS 8
38#endif
39
40#define DVB_UNSET (-1)
41
42#define DVB_DEVICE_VIDEO      0
43#define DVB_DEVICE_AUDIO      1
44#define DVB_DEVICE_SEC        2
45#define DVB_DEVICE_FRONTEND   3
46#define DVB_DEVICE_DEMUX      4
47#define DVB_DEVICE_DVR        5
48#define DVB_DEVICE_CA         6
49#define DVB_DEVICE_NET        7
50#define DVB_DEVICE_OSD        8
51
52#define DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr) \
53	static short adapter_nr[] = \
54		{[0 ... (DVB_MAX_ADAPTERS - 1)] = DVB_UNSET }; \
55	module_param_array(adapter_nr, short, NULL, 0444); \
56	MODULE_PARM_DESC(adapter_nr, "DVB adapter numbers")
57
58struct dvb_frontend;
59
60struct dvb_adapter {
61	int num;
62	struct list_head list_head;
63	struct list_head device_list;
64	const char *name;
65	u8 proposed_mac [6];
66	void* priv;
67
68	struct device *device;
69
70	struct module *module;
71
72	int mfe_shared;			/* indicates mutually exclusive frontends */
73	struct dvb_device *mfe_dvbdev;	/* frontend device in use */
74	struct mutex mfe_lock;		/* access lock for thread creation */
75
76#if defined(CONFIG_MEDIA_CONTROLLER_DVB)
77	struct media_device *mdev;
78#endif
79};
80
81
82struct dvb_device {
83	struct list_head list_head;
84	const struct file_operations *fops;
85	struct dvb_adapter *adapter;
86	int type;
87	int minor;
88	u32 id;
89
90	/* in theory, 'users' can vanish now,
91	   but I don't want to change too much now... */
92	int readers;
93	int writers;
94	int users;
95
96	wait_queue_head_t	  wait_queue;
97	/* don't really need those !? -- FIXME: use video_usercopy  */
98	int (*kernel_ioctl)(struct file *file, unsigned int cmd, void *arg);
99
100	/* Needed for media controller register/unregister */
101#if defined(CONFIG_MEDIA_CONTROLLER_DVB)
102	const char *name;
103
104	/* Allocated and filled inside dvbdev.c */
105	struct media_entity *entity;
106	struct media_pad *pads;
107#endif
108
109	void *priv;
110};
111
112
113extern int dvb_register_adapter(struct dvb_adapter *adap, const char *name,
114				struct module *module, struct device *device,
115				short *adapter_nums);
116extern int dvb_unregister_adapter (struct dvb_adapter *adap);
117
118extern int dvb_register_device (struct dvb_adapter *adap,
119				struct dvb_device **pdvbdev,
120				const struct dvb_device *template,
121				void *priv,
122				int type);
123
124extern void dvb_unregister_device (struct dvb_device *dvbdev);
125
126#ifdef CONFIG_MEDIA_CONTROLLER_DVB
127void dvb_create_media_graph(struct dvb_adapter *adap);
128static inline void dvb_register_media_controller(struct dvb_adapter *adap,
129						 struct media_device *mdev)
130{
131	adap->mdev = mdev;
132}
133
134#else
135static inline void dvb_create_media_graph(struct dvb_adapter *adap) {}
136#define dvb_register_media_controller(a, b) {}
137#endif
138
139extern int dvb_generic_open (struct inode *inode, struct file *file);
140extern int dvb_generic_release (struct inode *inode, struct file *file);
141extern long dvb_generic_ioctl (struct file *file,
142			      unsigned int cmd, unsigned long arg);
143
144/* we don't mess with video_usercopy() any more,
145we simply define out own dvb_usercopy(), which will hopefully become
146generic_usercopy()  someday... */
147
148extern int dvb_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
149			    int (*func)(struct file *file, unsigned int cmd, void *arg));
150
151/** generic DVB attach function. */
152#ifdef CONFIG_MEDIA_ATTACH
153#define dvb_attach(FUNCTION, ARGS...) ({ \
154	void *__r = NULL; \
155	typeof(&FUNCTION) __a = symbol_request(FUNCTION); \
156	if (__a) { \
157		__r = (void *) __a(ARGS); \
158		if (__r == NULL) \
159			symbol_put(FUNCTION); \
160	} else { \
161		printk(KERN_ERR "DVB: Unable to find symbol "#FUNCTION"()\n"); \
162	} \
163	__r; \
164})
165
166#define dvb_detach(FUNC)	symbol_put_addr(FUNC)
167
168#else
169#define dvb_attach(FUNCTION, ARGS...) ({ \
170	FUNCTION(ARGS); \
171})
172
173#define dvb_detach(FUNC)	{}
174
175#endif
176
177#endif /* #ifndef _DVBDEV_H_ */
178