LXR linux/drivers/media/dvb/dvb-core/dvbdev.h

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