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