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
  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 #warning invalid CONFIG_DVB_MAX_ADAPTERS value
  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
  58 struct dvb_adapter {
  59         int num;
  60         struct list_head list_head;
  61         struct list_head device_list;
  62         const char *name;
  63         u8 proposed_mac [6];
  64         void* priv;
  65
  66         struct device *device;
  67
  68         struct module *module;
  69
  70         int mfe_shared;                 /* indicates mutually exclusive frontends */
  71         struct dvb_device *mfe_dvbdev;  /* frontend device in use */
  72         struct mutex mfe_lock;          /* access lock for thread creation */
  73 };
  74
  75
  76 struct dvb_device {
  77         struct list_head list_head;
  78         const struct file_operations *fops;
  79         struct dvb_adapter *adapter;
  80         int type;
  81         int minor;
  82         u32 id;
  83
  84         /* in theory, 'users' can vanish now,
  85            but I don't want to change too much now... */
  86         int readers;
  87         int writers;
  88         int users;
  89
  90         wait_queue_head_t         wait_queue;
  91         /* don't really need those !? -- FIXME: use video_usercopy  */
  92         int (*kernel_ioctl)(struct inode *inode, struct file *file,
  93                             unsigned int cmd, void *arg);
  94
  95         void *priv;
  96 };
  97
  98
  99 extern int dvb_register_adapter(struct dvb_adapter *adap, const char *name,
 100                                 struct module *module, struct device *device,
 101                                 short *adapter_nums);
 102 extern int dvb_unregister_adapter (struct dvb_adapter *adap);
 103
 104 extern 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
 110 extern void dvb_unregister_device (struct dvb_device *dvbdev);
 111
 112 extern int dvb_generic_open (struct inode *inode, struct file *file);
 113 extern int dvb_generic_release (struct inode *inode, struct file *file);
 114 extern int dvb_generic_ioctl (struct inode *inode, struct file *file,
 115                               unsigned int cmd, unsigned long arg);
 116
 117 /* we don't mess with video_usercopy() any more,
 118 we simply define out own dvb_usercopy(), which will hopefully become
 119 generic_usercopy()  someday... */
 120
 121 extern int dvb_usercopy(struct inode *inode, struct file *file,
 122                             unsigned int cmd, unsigned long arg,
 123                             int (*func)(struct inode *inode, struct file *file,
 124                             unsigned int cmd, void *arg));
 125
 126 /** generic DVB attach function. */
 127 #ifdef CONFIG_MEDIA_ATTACH
 128 #define dvb_attach(FUNCTION, ARGS...) ({ \
 129         void *__r = NULL; \
 130         typeof(&FUNCTION) __a = symbol_request(FUNCTION); \
 131         if (__a) { \
 132                 __r = (void *) __a(ARGS); \
 133                 if (__r == NULL) \
 134                         symbol_put(FUNCTION); \
 135         } else { \
 136                 printk(KERN_ERR "DVB: Unable to find symbol "#FUNCTION"()\n"); \
 137         } \
 138         __r; \
 139 })
 140
 141 #else
 142 #define dvb_attach(FUNCTION, ARGS...) ({ \
 143         FUNCTION(ARGS); \
 144 })
 145
 146 #endif
 147
 148 #endif /* #ifndef _DVBDEV_H_ */