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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
31#define DVB_MAJOR 212
32
33#if defined(CONFIG_DVB_MAX_ADAPTERS) && CONFIG_DVB_MAX_ADAPTERS > 0
34  #define DVB_MAX_ADAPTERS CONFIG_DVB_MAX_ADAPTERS
35#else
36  #define DVB_MAX_ADAPTERS 8
37#endif
38
39#define DVB_UNSET (-1)
40
41#define DVB_DEVICE_VIDEO      0
42#define DVB_DEVICE_AUDIO      1
43#define DVB_DEVICE_SEC        2
44#define DVB_DEVICE_FRONTEND   3
45#define DVB_DEVICE_DEMUX      4
46#define DVB_DEVICE_DVR        5
47#define DVB_DEVICE_CA         6
48#define DVB_DEVICE_NET        7
49#define DVB_DEVICE_OSD        8
50
51#define DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr) \
52	static short adapter_nr[] = \
53		{[0 ... (DVB_MAX_ADAPTERS - 1)] = DVB_UNSET }; \
54	module_param_array(adapter_nr, short, NULL, 0444); \
55	MODULE_PARM_DESC(adapter_nr, "DVB adapter numbers")
56
57struct dvb_frontend;
58
59struct dvb_adapter {
60	int num;
61	struct list_head list_head;
62	struct list_head device_list;
63	const char *name;
64	u8 proposed_mac [6];
65	void* priv;
66
67	struct device *device;
68
69	struct module *module;
70
71	int mfe_shared;			/* indicates mutually exclusive frontends */
72	struct dvb_device *mfe_dvbdev;	/* frontend device in use */
73	struct mutex mfe_lock;		/* access lock for thread creation */
74};
75
76
77struct dvb_device {
78	struct list_head list_head;
79	const struct file_operations *fops;
80	struct dvb_adapter *adapter;
81	int type;
82	int minor;
83	u32 id;
84
85	/* in theory, 'users' can vanish now,
86	   but I don't want to change too much now... */
87	int readers;
88	int writers;
89	int users;
90
91	wait_queue_head_t	  wait_queue;
92	/* don't really need those !? -- FIXME: use video_usercopy  */
93	int (*kernel_ioctl)(struct file *file, unsigned int cmd, void *arg);
94
95	void *priv;
96};
97
98
99extern int dvb_register_adapter(struct dvb_adapter *adap, const char *name,
100				struct module *module, struct device *device,
101				short *adapter_nums);
102extern int dvb_unregister_adapter (struct dvb_adapter *adap);
103
104extern int dvb_register_device (struct dvb_adapter *adap,
105				struct dvb_device **pdvbdev,
106				const struct dvb_device *template,
107				void *priv,
108				int type);
109
110extern void dvb_unregister_device (struct dvb_device *dvbdev);
111
112extern int dvb_generic_open (struct inode *inode, struct file *file);
113extern int dvb_generic_release (struct inode *inode, struct file *file);
114extern long dvb_generic_ioctl (struct file *file,
115			      unsigned int cmd, unsigned long arg);
116
117/* we don't mess with video_usercopy() any more,
118we simply define out own dvb_usercopy(), which will hopefully become
119generic_usercopy()  someday... */
120
121extern int dvb_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
122			    int (*func)(struct file *file, unsigned int cmd, void *arg));
123
124/** generic DVB attach function. */
125#ifdef CONFIG_MEDIA_ATTACH
126#define dvb_attach(FUNCTION, ARGS...) ({ \
127	void *__r = NULL; \
128	typeof(&FUNCTION) __a = symbol_request(FUNCTION); \
129	if (__a) { \
130		__r = (void *) __a(ARGS); \
131		if (__r == NULL) \
132			symbol_put(FUNCTION); \
133	} else { \
134		printk(KERN_ERR "DVB: Unable to find symbol "#FUNCTION"()\n"); \
135	} \
136	__r; \
137})
138
139#define dvb_detach(FUNC)	symbol_put_addr(FUNC)
140
141#else
142#define dvb_attach(FUNCTION, ARGS...) ({ \
143	FUNCTION(ARGS); \
144})
145
146#define dvb_detach(FUNC)	{}
147
148#endif
149
150#endif /* #ifndef _DVBDEV_H_ */
151