2005-04-16 16:20:36 -06:00
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/*
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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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*/
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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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2015-01-02 08:19:51 -07:00
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#include <media/media-device.h>
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2005-04-16 16:20:36 -06:00
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#define DVB_MAJOR 212
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2009-09-01 16:15:39 -06:00
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#if defined(CONFIG_DVB_MAX_ADAPTERS) && CONFIG_DVB_MAX_ADAPTERS > 0
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2009-09-19 06:45:22 -06:00
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#define DVB_MAX_ADAPTERS CONFIG_DVB_MAX_ADAPTERS
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2009-09-01 16:15:39 -06:00
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#else
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2016-04-05 10:14:10 -06:00
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#define DVB_MAX_ADAPTERS 16
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2009-09-01 16:15:39 -06:00
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#endif
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2008-04-09 16:13:13 -06:00
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#define DVB_UNSET (-1)
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2017-09-19 12:22:19 -06:00
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/* List of DVB device types */
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/**
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* enum dvb_device_type - type of the Digital TV device
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*
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* @DVB_DEVICE_SEC: Digital TV standalone Common Interface (CI)
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* @DVB_DEVICE_FRONTEND: Digital TV frontend.
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* @DVB_DEVICE_DEMUX: Digital TV demux.
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* @DVB_DEVICE_DVR: Digital TV digital video record (DVR).
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* @DVB_DEVICE_CA: Digital TV Conditional Access (CA).
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* @DVB_DEVICE_NET: Digital TV network.
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*
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* @DVB_DEVICE_VIDEO: Digital TV video decoder.
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* Deprecated. Used only on av7110-av.
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* @DVB_DEVICE_AUDIO: Digital TV audio decoder.
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* Deprecated. Used only on av7110-av.
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* @DVB_DEVICE_OSD: Digital TV On Screen Display (OSD).
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* Deprecated. Used only on av7110.
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*/
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enum dvb_device_type {
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DVB_DEVICE_SEC,
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DVB_DEVICE_FRONTEND,
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DVB_DEVICE_DEMUX,
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DVB_DEVICE_DVR,
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DVB_DEVICE_CA,
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DVB_DEVICE_NET,
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DVB_DEVICE_VIDEO,
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DVB_DEVICE_AUDIO,
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DVB_DEVICE_OSD,
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};
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2005-04-16 16:20:36 -06:00
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2008-04-09 16:13:13 -06:00
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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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2005-04-16 16:20:36 -06:00
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2009-05-23 15:00:59 -06:00
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struct dvb_frontend;
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2015-08-22 16:39:38 -06:00
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/**
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* struct dvb_adapter - represents a Digital TV adapter using Linux DVB API
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*
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* @num: Number of the adapter
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* @list_head: List with the DVB adapters
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* @device_list: List with the DVB devices
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* @name: Name of the adapter
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* @proposed_mac: proposed MAC address for the adapter
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* @priv: private data
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* @device: pointer to struct device
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* @module: pointer to struct module
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* @mfe_shared: mfe shared: indicates mutually exclusive frontends
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* Thie usage of this flag is currently deprecated
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* @mfe_dvbdev: Frontend device in use, in the case of MFE
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* @mfe_lock: Lock to prevent using the other frontends when MFE is
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* used.
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* @mdev: pointer to struct media_device, used when the media
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* controller is used.
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2015-12-29 06:52:23 -07:00
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* @conn: RF connector. Used only if the device has no separate
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* tuner.
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* @conn_pads: pointer to struct media_pad associated with @conn;
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2015-08-22 16:39:38 -06:00
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*/
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2005-04-16 16:20:36 -06:00
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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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2006-04-10 06:27:37 -06:00
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struct device *device;
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2005-04-16 16:20:36 -06:00
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struct module *module;
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2008-10-11 08:44:05 -06:00
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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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2015-01-02 08:19:51 -07:00
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#if defined(CONFIG_MEDIA_CONTROLLER_DVB)
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struct media_device *mdev;
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2015-12-29 06:52:23 -07:00
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struct media_entity *conn;
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struct media_pad *conn_pads;
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2015-01-02 08:19:51 -07:00
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#endif
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2005-04-16 16:20:36 -06:00
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};
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2015-08-22 16:39:38 -06:00
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/**
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* struct dvb_device - represents a DVB device node
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*
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* @list_head: List head with all DVB devices
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* @fops: pointer to struct file_operations
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* @adapter: pointer to the adapter that holds this device node
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2017-09-19 12:22:19 -06:00
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* @type: type of the device, as defined by &enum dvb_device_type.
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2015-08-22 16:39:38 -06:00
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* @minor: devnode minor number. Major number is always DVB_MAJOR.
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* @id: device ID number, inside the adapter
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* @readers: Initialized by the caller. Each call to open() in Read Only mode
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* decreases this counter by one.
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* @writers: Initialized by the caller. Each call to open() in Read/Write
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* mode decreases this counter by one.
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* @users: Initialized by the caller. Each call to open() in any mode
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* decreases this counter by one.
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* @wait_queue: wait queue, used to wait for certain events inside one of
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* the DVB API callers
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* @kernel_ioctl: callback function used to handle ioctl calls from userspace.
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* @name: Name to be used for the device at the Media Controller
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* @entity: pointer to struct media_entity associated with the device node
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* @pads: pointer to struct media_pad associated with @entity;
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* @priv: private data
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2015-12-12 03:25:44 -07:00
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* @intf_devnode: Pointer to media_intf_devnode. Used by the dvbdev core to
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* store the MC device node interface
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* @tsout_num_entities: Number of Transport Stream output entities
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* @tsout_entity: array with MC entities associated to each TS output node
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* @tsout_pads: array with the source pads for each @tsout_entity
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2015-08-22 16:39:38 -06:00
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*
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* This structure is used by the DVB core (frontend, CA, net, demux) in
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* order to create the device nodes. Usually, driver should not initialize
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* this struct diretly.
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*/
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2005-04-16 16:20:36 -06:00
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struct dvb_device {
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struct list_head list_head;
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2009-01-11 02:12:43 -07:00
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const struct file_operations *fops;
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2005-04-16 16:20:36 -06:00
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struct dvb_adapter *adapter;
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2017-09-19 12:22:19 -06:00
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enum dvb_device_type type;
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2008-10-23 09:11:19 -06:00
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int minor;
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2005-04-16 16:20:36 -06:00
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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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2007-04-14 07:18:58 -06:00
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wait_queue_head_t wait_queue;
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2005-12-12 01:37:27 -07:00
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/* don't really need those !? -- FIXME: use video_usercopy */
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2010-04-26 16:24:00 -06:00
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int (*kernel_ioctl)(struct file *file, unsigned int cmd, void *arg);
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2005-04-16 16:20:36 -06:00
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2015-01-02 08:19:51 -07:00
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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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2015-01-02 21:59:53 -07:00
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/* Allocated and filled inside dvbdev.c */
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2015-08-21 05:20:22 -06:00
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struct media_intf_devnode *intf_devnode;
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2015-08-21 13:18:18 -06:00
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unsigned tsout_num_entities;
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struct media_entity *entity, *tsout_entity;
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struct media_pad *pads, *tsout_pads;
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2015-01-02 08:19:51 -07:00
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#endif
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2005-04-16 16:20:36 -06:00
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void *priv;
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};
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2015-08-22 16:39:38 -06:00
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/**
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* dvb_register_adapter - Registers a new DVB adapter
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*
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* @adap: pointer to struct dvb_adapter
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* @name: Adapter's name
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* @module: initialized with THIS_MODULE at the caller
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* @device: pointer to struct device that corresponds to the device driver
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* @adapter_nums: Array with a list of the numbers for @dvb_register_adapter;
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2018-01-04 04:47:28 -07:00
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* to select among them. Typically, initialized with:
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2015-08-22 16:39:38 -06:00
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* DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nums)
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*/
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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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2005-04-16 16:20:36 -06:00
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2015-08-22 16:39:38 -06:00
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/**
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* dvb_unregister_adapter - Unregisters a DVB adapter
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*
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* @adap: pointer to struct dvb_adapter
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*/
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int dvb_unregister_adapter(struct dvb_adapter *adap);
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2005-04-16 16:20:36 -06:00
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2015-08-22 16:39:38 -06:00
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/**
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* dvb_register_device - Registers a new DVB device
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*
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* @adap: pointer to struct dvb_adapter
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* @pdvbdev: pointer to the place where the new struct dvb_device will be
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* stored
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* @template: Template used to create &pdvbdev;
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* @priv: private data
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2017-09-19 12:22:19 -06:00
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* @type: type of the device, as defined by &enum dvb_device_type.
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2015-12-12 03:25:44 -07:00
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* @demux_sink_pads: Number of demux outputs, to be used to create the TS
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* outputs via the Media Controller.
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2015-08-22 16:39:38 -06:00
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*/
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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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2017-09-19 12:22:19 -06:00
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enum dvb_device_type type,
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2015-08-21 13:18:18 -06:00
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int demux_sink_pads);
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2015-08-22 16:39:38 -06:00
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2016-08-09 15:32:11 -06:00
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/**
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* dvb_remove_device - Remove a registered DVB device
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*
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* This does not free memory. To do that, call dvb_free_device().
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*
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* @dvbdev: pointer to struct dvb_device
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*/
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void dvb_remove_device(struct dvb_device *dvbdev);
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/**
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* dvb_free_device - Free memory occupied by a DVB device.
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*
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* Call dvb_unregister_device() before calling this function.
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*
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* @dvbdev: pointer to struct dvb_device
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*/
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void dvb_free_device(struct dvb_device *dvbdev);
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2015-08-22 16:39:38 -06:00
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/**
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* dvb_unregister_device - Unregisters a DVB device
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*
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2016-08-09 15:32:11 -06:00
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* This is a combination of dvb_remove_device() and dvb_free_device().
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* Using this function is usually a mistake, and is often an indicator
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* for a use-after-free bug (when a userspace process keeps a file
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* handle to a detached device).
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*
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2015-08-22 16:39:38 -06:00
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* @dvbdev: pointer to struct dvb_device
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*/
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void dvb_unregister_device(struct dvb_device *dvbdev);
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2015-03-02 06:49:04 -07:00
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#ifdef CONFIG_MEDIA_CONTROLLER_DVB
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2015-12-29 06:52:23 -07:00
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/**
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* dvb_create_media_graph - Creates media graph for the Digital TV part of the
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2018-01-04 04:47:28 -07:00
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* device.
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2015-12-29 06:52:23 -07:00
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*
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2017-09-19 14:11:55 -06:00
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* @adap: pointer to &struct dvb_adapter
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2015-12-29 06:52:23 -07:00
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* @create_rf_connector: if true, it creates the RF connector too
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2015-12-30 05:11:53 -07:00
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*
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* This function checks all DVB-related functions at the media controller
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* entities and creates the needed links for the media graph. It is
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* capable of working with multiple tuners or multiple frontends, but it
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* won't create links if the device has multiple tuners and multiple frontends
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* or if the device has multiple muxes. In such case, the caller driver should
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* manually create the remaining links.
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2015-12-29 06:52:23 -07:00
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*/
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__must_check int dvb_create_media_graph(struct dvb_adapter *adap,
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bool create_rf_connector);
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2017-09-19 14:11:55 -06:00
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/**
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* dvb_register_media_controller - registers a media controller at DVB adapter
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*
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* @adap: pointer to &struct dvb_adapter
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* @mdev: pointer to &struct media_device
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*/
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2015-03-02 07:26:14 -07:00
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static inline void dvb_register_media_controller(struct dvb_adapter *adap,
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struct media_device *mdev)
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{
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adap->mdev = mdev;
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}
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2017-09-19 14:11:55 -06:00
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/**
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* dvb_get_media_controller - gets the associated media controller
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*
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* @adap: pointer to &struct dvb_adapter
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*/
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2015-12-30 06:09:39 -07:00
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static inline struct media_device
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*dvb_get_media_controller(struct dvb_adapter *adap)
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{
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return adap->mdev;
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}
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2015-03-02 06:49:04 -07:00
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#else
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2015-12-29 06:52:23 -07:00
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static inline
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int dvb_create_media_graph(struct dvb_adapter *adap,
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bool create_rf_connector)
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2015-09-04 12:10:29 -06:00
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{
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return 0;
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};
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2015-03-02 07:26:14 -07:00
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#define dvb_register_media_controller(a, b) {}
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2015-12-30 06:09:39 -07:00
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#define dvb_get_media_controller(a) NULL
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2015-03-02 06:49:04 -07:00
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#endif
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2005-04-16 16:20:36 -06:00
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2017-09-19 14:11:55 -06:00
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/**
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* dvb_generic_open - Digital TV open function, used by DVB devices
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*
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* @inode: pointer to &struct inode.
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* @file: pointer to &struct file.
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*
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* Checks if a DVB devnode is still valid, and if the permissions are
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* OK and increment negative use count.
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*/
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int dvb_generic_open(struct inode *inode, struct file *file);
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2005-04-16 16:20:36 -06:00
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2017-09-19 14:11:55 -06:00
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/**
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* dvb_generic_close - Digital TV close function, used by DVB devices
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*
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* @inode: pointer to &struct inode.
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* @file: pointer to &struct file.
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*
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* Checks if a DVB devnode is still valid, and if the permissions are
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* OK and decrement negative use count.
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*/
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int dvb_generic_release(struct inode *inode, struct file *file);
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2005-04-16 16:20:36 -06:00
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2017-09-19 14:11:55 -06:00
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/**
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* dvb_generic_ioctl - Digital TV close function, used by DVB devices
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*
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* @file: pointer to &struct file.
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* @cmd: Ioctl name.
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* @arg: Ioctl argument.
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*
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* Checks if a DVB devnode and struct dvbdev.kernel_ioctl is still valid.
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* If so, calls dvb_usercopy().
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*/
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long dvb_generic_ioctl(struct file *file,
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unsigned int cmd, unsigned long arg);
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/**
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* dvb_usercopy - copies data from/to userspace memory when an ioctl is
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* issued.
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*
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* @file: Pointer to struct &file.
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* @cmd: Ioctl name.
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* @arg: Ioctl argument.
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* @func: function that will actually handle the ioctl
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*
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* Ancillary function that uses ioctl direction and size to copy from
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* userspace. Then, it calls @func, and, if needed, data is copied back
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* to userspace.
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*/
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2015-08-22 16:39:38 -06:00
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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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2005-04-16 16:20:36 -06:00
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2006-08-08 06:10:08 -06:00
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/** generic DVB attach function. */
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2008-04-29 18:38:46 -06:00
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#ifdef CONFIG_MEDIA_ATTACH
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2017-09-19 14:11:55 -06:00
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/**
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* dvb_attach - attaches a DVB frontend into the DVB core.
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*
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* @FUNCTION: function on a frontend module to be called.
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* @ARGS...: @FUNCTION arguments.
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*
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* This ancillary function loads a frontend module in runtime and runs
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* the @FUNCTION function there, with @ARGS.
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* As it increments symbol usage cont, at unregister, dvb_detach()
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* should be called.
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*/
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2006-08-08 06:10:08 -06:00
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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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2017-09-19 14:11:55 -06:00
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/**
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* dvb_detach - detaches a DVB frontend loaded via dvb_attach()
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*
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* @FUNC: attach function
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*
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* Decrements usage count for a function previously called via dvb_attach().
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*/
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2014-05-29 06:20:13 -06:00
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#define dvb_detach(FUNC) symbol_put_addr(FUNC)
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2006-08-08 06:10:08 -06:00
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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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2014-05-29 06:20:13 -06:00
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#define dvb_detach(FUNC) {}
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2006-08-08 06:10:08 -06:00
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#endif
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2005-04-16 16:20:36 -06:00
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#endif /* #ifndef _DVBDEV_H_ */
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