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
  45 struct 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
  59 struct 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
  81 extern int dvb_register_adapter (struct dvb_adapter *adap, const char *name, struct module *module, struct device *device);
  82 extern int dvb_unregister_adapter (struct dvb_adapter *adap);
  83
  84 extern 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
  90 extern void dvb_unregister_device (struct dvb_device *dvbdev);
  91
  92 extern int dvb_generic_open (struct inode *inode, struct file *file);
  93 extern int dvb_generic_release (struct inode *inode, struct file *file);
  94 extern 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,
  98 we simply define out own dvb_usercopy(), which will hopefully become
  99 generic_usercopy()  someday... */
 100
 101 extern 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_ */