4155109aa8
We need to create a DVB graph, linking the several DVB devnodes. Add such function. Please notice that this helper function doesn't take into account devices with multiple DVB adapters and frontends. For devices with multiple adapters, they should either create two different media controller instances or to improve this function to take the adapter ID into account. Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
166 lines
4.4 KiB
C
166 lines
4.4 KiB
C
/*
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* dvbdev.h
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*
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* Copyright (C) 2000 Ralph Metzler & Marcus Metzler
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* for convergence integrated media GmbH
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Lesser Public License
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* as published by the Free Software Foundation; either version 2.1
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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*/
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#ifndef _DVBDEV_H_
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#define _DVBDEV_H_
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#include <linux/types.h>
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#include <linux/poll.h>
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#include <linux/fs.h>
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#include <linux/list.h>
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#include <media/media-device.h>
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#define DVB_MAJOR 212
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#if defined(CONFIG_DVB_MAX_ADAPTERS) && CONFIG_DVB_MAX_ADAPTERS > 0
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#define DVB_MAX_ADAPTERS CONFIG_DVB_MAX_ADAPTERS
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#else
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#define DVB_MAX_ADAPTERS 8
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#endif
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#define DVB_UNSET (-1)
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#define DVB_DEVICE_VIDEO 0
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#define DVB_DEVICE_AUDIO 1
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#define DVB_DEVICE_SEC 2
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#define DVB_DEVICE_FRONTEND 3
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#define DVB_DEVICE_DEMUX 4
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#define DVB_DEVICE_DVR 5
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#define DVB_DEVICE_CA 6
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#define DVB_DEVICE_NET 7
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#define DVB_DEVICE_OSD 8
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#define DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr) \
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static short adapter_nr[] = \
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{[0 ... (DVB_MAX_ADAPTERS - 1)] = DVB_UNSET }; \
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module_param_array(adapter_nr, short, NULL, 0444); \
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MODULE_PARM_DESC(adapter_nr, "DVB adapter numbers")
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struct dvb_frontend;
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struct dvb_adapter {
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int num;
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struct list_head list_head;
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struct list_head device_list;
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const char *name;
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u8 proposed_mac [6];
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void* priv;
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struct device *device;
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struct module *module;
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int mfe_shared; /* indicates mutually exclusive frontends */
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struct dvb_device *mfe_dvbdev; /* frontend device in use */
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struct mutex mfe_lock; /* access lock for thread creation */
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#if defined(CONFIG_MEDIA_CONTROLLER_DVB)
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struct media_device *mdev;
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#endif
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};
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struct dvb_device {
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struct list_head list_head;
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const struct file_operations *fops;
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struct dvb_adapter *adapter;
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int type;
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int minor;
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u32 id;
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/* in theory, 'users' can vanish now,
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but I don't want to change too much now... */
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int readers;
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int writers;
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int users;
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wait_queue_head_t wait_queue;
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/* don't really need those !? -- FIXME: use video_usercopy */
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int (*kernel_ioctl)(struct file *file, unsigned int cmd, void *arg);
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/* Needed for media controller register/unregister */
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#if defined(CONFIG_MEDIA_CONTROLLER_DVB)
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const char *name;
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/* Allocated and filled inside dvbdev.c */
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struct media_entity *entity;
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struct media_pad *pads;
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#endif
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void *priv;
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};
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extern int dvb_register_adapter(struct dvb_adapter *adap, const char *name,
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struct module *module, struct device *device,
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short *adapter_nums);
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extern int dvb_unregister_adapter (struct dvb_adapter *adap);
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extern int dvb_register_device (struct dvb_adapter *adap,
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struct dvb_device **pdvbdev,
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const struct dvb_device *template,
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void *priv,
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int type);
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extern void dvb_unregister_device (struct dvb_device *dvbdev);
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void dvb_create_media_graph(struct media_device *mdev);
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extern int dvb_generic_open (struct inode *inode, struct file *file);
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extern int dvb_generic_release (struct inode *inode, struct file *file);
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extern long dvb_generic_ioctl (struct file *file,
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unsigned int cmd, unsigned long arg);
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/* we don't mess with video_usercopy() any more,
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we simply define out own dvb_usercopy(), which will hopefully become
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generic_usercopy() someday... */
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extern int dvb_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
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int (*func)(struct file *file, unsigned int cmd, void *arg));
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/** generic DVB attach function. */
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#ifdef CONFIG_MEDIA_ATTACH
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#define dvb_attach(FUNCTION, ARGS...) ({ \
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void *__r = NULL; \
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typeof(&FUNCTION) __a = symbol_request(FUNCTION); \
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if (__a) { \
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__r = (void *) __a(ARGS); \
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if (__r == NULL) \
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symbol_put(FUNCTION); \
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} else { \
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printk(KERN_ERR "DVB: Unable to find symbol "#FUNCTION"()\n"); \
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} \
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__r; \
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})
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#define dvb_detach(FUNC) symbol_put_addr(FUNC)
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#else
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#define dvb_attach(FUNCTION, ARGS...) ({ \
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FUNCTION(ARGS); \
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})
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#define dvb_detach(FUNC) {}
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#endif
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#endif /* #ifndef _DVBDEV_H_ */
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