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 57 struct dvb_frontend; 58 59 struct 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 /* Allow the adapter/bridge driver to perform an action before and/or 76 * after the core handles an ioctl: 77 * 78 * DVB_FE_IOCTL_PRE indicates that the ioctl has not yet been handled. 79 * DVB_FE_IOCTL_POST indicates that the ioctl has been handled. 80 * 81 * When DVB_FE_IOCTL_PRE is passed to the callback as the stage arg: 82 * 83 * return 0 to allow dvb-core to handle the ioctl. 84 * return a positive int to prevent dvb-core from handling the ioctl, 85 * and exit without error. 86 * return a negative int to prevent dvb-core from handling the ioctl, 87 * and return that value as an error. 88 * 89 * When DVB_FE_IOCTL_POST is passed to the callback as the stage arg: 90 * 91 * return 0 to allow the dvb_frontend ioctl handler to exit normally. 92 * return a negative int to cause the dvb_frontend ioctl handler to 93 * return that value as an error. 94 */ 95 #define DVB_FE_IOCTL_PRE 0 96 #define DVB_FE_IOCTL_POST 1 97 int (*fe_ioctl_override)(struct dvb_frontend *fe, 98 unsigned int cmd, void *parg, 99 unsigned int stage); 100 }; 101 102 103 struct dvb_device { 104 struct list_head list_head; 105 const struct file_operations *fops; 106 struct dvb_adapter *adapter; 107 int type; 108 int minor; 109 u32 id; 110 111 /* in theory, 'users' can vanish now, 112 but I don't want to change too much now... */ 113 int readers; 114 int writers; 115 int users; 116 117 wait_queue_head_t wait_queue; 118 /* don't really need those !? -- FIXME: use video_usercopy */ 119 int (*kernel_ioctl)(struct file *file, unsigned int cmd, void *arg); 120 121 void *priv; 122 }; 123 124 125 extern int dvb_register_adapter(struct dvb_adapter *adap, const char *name, 126 struct module *module, struct device *device, 127 short *adapter_nums); 128 extern int dvb_unregister_adapter (struct dvb_adapter *adap); 129 130 extern int dvb_register_device (struct dvb_adapter *adap, 131 struct dvb_device **pdvbdev, 132 const struct dvb_device *template, 133 void *priv, 134 int type); 135 136 extern void dvb_unregister_device (struct dvb_device *dvbdev); 137 138 extern int dvb_generic_open (struct inode *inode, struct file *file); 139 extern int dvb_generic_release (struct inode *inode, struct file *file); 140 extern long dvb_generic_ioctl (struct file *file, 141 unsigned int cmd, unsigned long arg); 142 143 /* we don't mess with video_usercopy() any more, 144 we simply define out own dvb_usercopy(), which will hopefully become 145 generic_usercopy() someday... */ 146 147 extern int dvb_usercopy(struct file *file, unsigned int cmd, unsigned long arg, 148 int (*func)(struct file *file, unsigned int cmd, void *arg)); 149 150 /** generic DVB attach function. */ 151 #ifdef CONFIG_MEDIA_ATTACH 152 #define dvb_attach(FUNCTION, ARGS...) ({ \ 153 void *__r = NULL; \ 154 typeof(&FUNCTION) __a = symbol_request(FUNCTION); \ 155 if (__a) { \ 156 __r = (void *) __a(ARGS); \ 157 if (__r == NULL) \ 158 symbol_put(FUNCTION); \ 159 } else { \ 160 printk(KERN_ERR "DVB: Unable to find symbol "#FUNCTION"()\n"); \ 161 } \ 162 __r; \ 163 }) 164 165 #else 166 #define dvb_attach(FUNCTION, ARGS...) ({ \ 167 FUNCTION(ARGS); \ 168 }) 169 170 #endif 171 172 #endif /* #ifndef _DVBDEV_H_ */ 173