Release 4.7 drivers/media/dvb-core/dvbdev.h

/*
 * dvbdev.h
 *
 * Copyright (C) 2000 Ralph Metzler & Marcus Metzler
 *                    for convergence integrated media GmbH
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Lesser Public License
 * as published by the Free Software Foundation; either version 2.1
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 */

#ifndef _DVBDEV_H_

#define _DVBDEV_H_

#include <linux/types.h>
#include <linux/poll.h>
#include <linux/fs.h>
#include <linux/list.h>
#include <media/media-device.h>


#define DVB_MAJOR 212

#if defined(CONFIG_DVB_MAX_ADAPTERS) && CONFIG_DVB_MAX_ADAPTERS > 0
  
#define DVB_MAX_ADAPTERS CONFIG_DVB_MAX_ADAPTERS
#else
  
#define DVB_MAX_ADAPTERS 8
#endif


#define DVB_UNSET (-1)


#define DVB_DEVICE_VIDEO      0

#define DVB_DEVICE_AUDIO      1

#define DVB_DEVICE_SEC        2

#define DVB_DEVICE_FRONTEND   3

#define DVB_DEVICE_DEMUX      4

#define DVB_DEVICE_DVR        5

#define DVB_DEVICE_CA         6

#define DVB_DEVICE_NET        7

#define DVB_DEVICE_OSD        8


#define DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr) \
	static short adapter_nr[] = \
                {[0 ... (DVB_MAX_ADAPTERS - 1)] = DVB_UNSET }; \
        module_param_array(adapter_nr, short, NULL, 0444); \
        MODULE_PARM_DESC(adapter_nr, "DVB adapter numbers")

struct dvb_frontend;

/**
 * struct dvb_adapter - represents a Digital TV adapter using Linux DVB API
 *
 * @num:                Number of the adapter
 * @list_head:          List with the DVB adapters
 * @device_list:        List with the DVB devices
 * @name:               Name of the adapter
 * @proposed_mac:       proposed MAC address for the adapter
 * @priv:               private data
 * @device:             pointer to struct device
 * @module:             pointer to struct module
 * @mfe_shared:         mfe shared: indicates mutually exclusive frontends
 *                      Thie usage of this flag is currently deprecated
 * @mfe_dvbdev:         Frontend device in use, in the case of MFE
 * @mfe_lock:           Lock to prevent using the other frontends when MFE is
 *                      used.
 * @mdev:               pointer to struct media_device, used when the media
 *                      controller is used.
 * @conn:               RF connector. Used only if the device has no separate
 *                      tuner.
 * @conn_pads:          pointer to struct media_pad associated with @conn;
 */

struct dvb_adapter {
	
int num;
	
struct list_head list_head;
	
struct list_head device_list;
	
const char *name;
	
u8 proposed_mac [6];
	
void* priv;

	
struct device *device;

	
struct module *module;

	
int mfe_shared;			/* indicates mutually exclusive frontends */
	
struct dvb_device *mfe_dvbdev;	/* frontend device in use */
	
struct mutex mfe_lock;		/* access lock for thread creation */

#if defined(CONFIG_MEDIA_CONTROLLER_DVB)
	
struct media_device *mdev;
	
struct media_entity *conn;
	
struct media_pad *conn_pads;
#endif
};

/**
 * struct dvb_device - represents a DVB device node
 *
 * @list_head:  List head with all DVB devices
 * @fops:       pointer to struct file_operations
 * @adapter:    pointer to the adapter that holds this device node
 * @type:       type of the device: DVB_DEVICE_SEC, DVB_DEVICE_FRONTEND,
 *              DVB_DEVICE_DEMUX, DVB_DEVICE_DVR, DVB_DEVICE_CA, DVB_DEVICE_NET
 * @minor:      devnode minor number. Major number is always DVB_MAJOR.
 * @id:         device ID number, inside the adapter
 * @readers:    Initialized by the caller. Each call to open() in Read Only mode
 *              decreases this counter by one.
 * @writers:    Initialized by the caller. Each call to open() in Read/Write
 *              mode decreases this counter by one.
 * @users:      Initialized by the caller. Each call to open() in any mode
 *              decreases this counter by one.
 * @wait_queue: wait queue, used to wait for certain events inside one of
 *              the DVB API callers
 * @kernel_ioctl: callback function used to handle ioctl calls from userspace.
 * @name:       Name to be used for the device at the Media Controller
 * @entity:     pointer to struct media_entity associated with the device node
 * @pads:       pointer to struct media_pad associated with @entity;
 * @priv:       private data
 * @intf_devnode: Pointer to media_intf_devnode. Used by the dvbdev core to
 *              store the MC device node interface
 * @tsout_num_entities: Number of Transport Stream output entities
 * @tsout_entity: array with MC entities associated to each TS output node
 * @tsout_pads: array with the source pads for each @tsout_entity
 *
 * This structure is used by the DVB core (frontend, CA, net, demux) in
 * order to create the device nodes. Usually, driver should not initialize
 * this struct diretly.
 */

struct dvb_device {
	
struct list_head list_head;
	
const struct file_operations *fops;
	
struct dvb_adapter *adapter;
	
int type;
	
int minor;
	
u32 id;

	/* in theory, 'users' can vanish now,
           but I don't want to change too much now... */
	
int readers;
	
int writers;
	
int users;

	
wait_queue_head_t	  wait_queue;
	/* don't really need those !? -- FIXME: use video_usercopy  */
	
int (*kernel_ioctl)(struct file *file, unsigned int cmd, void *arg);

	/* Needed for media controller register/unregister */
#if defined(CONFIG_MEDIA_CONTROLLER_DVB)
	
const char *name;

	/* Allocated and filled inside dvbdev.c */
	
struct media_intf_devnode *intf_devnode;

	
unsigned tsout_num_entities;
	

struct media_entity *entity, *tsout_entity;
	

struct media_pad *pads, *tsout_pads;
#endif

	
void *priv;
};

/**
 * dvb_register_adapter - Registers a new DVB adapter
 *
 * @adap:       pointer to struct dvb_adapter
 * @name:       Adapter's name
 * @module:     initialized with THIS_MODULE at the caller
 * @device:     pointer to struct device that corresponds to the device driver
 * @adapter_nums: Array with a list of the numbers for @dvb_register_adapter;
 *              to select among them. Typically, initialized with:
 *              DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nums)
 */
int dvb_register_adapter(struct dvb_adapter *adap, const char *name,
			 struct module *module, struct device *device,
			 short *adapter_nums);

/**
 * dvb_unregister_adapter - Unregisters a DVB adapter
 *
 * @adap:       pointer to struct dvb_adapter
 */
int dvb_unregister_adapter(struct dvb_adapter *adap);

/**
 * dvb_register_device - Registers a new DVB device
 *
 * @adap:       pointer to struct dvb_adapter
 * @pdvbdev:    pointer to the place where the new struct dvb_device will be
 *              stored
 * @template:   Template used to create &pdvbdev;
 * @priv:       private data
 * @type:       type of the device: %DVB_DEVICE_SEC, %DVB_DEVICE_FRONTEND,
 *              %DVB_DEVICE_DEMUX, %DVB_DEVICE_DVR, %DVB_DEVICE_CA,
 *              %DVB_DEVICE_NET
 * @demux_sink_pads: Number of demux outputs, to be used to create the TS
 *              outputs via the Media Controller.
 */
int dvb_register_device(struct dvb_adapter *adap,
			struct dvb_device **pdvbdev,
			const struct dvb_device *template,
			void *priv,
			int type,
			int demux_sink_pads);

/**
 * dvb_unregister_device - Unregisters a DVB device
 *
 * @dvbdev:     pointer to struct dvb_device
 */
void dvb_unregister_device(struct dvb_device *dvbdev);

#ifdef CONFIG_MEDIA_CONTROLLER_DVB
/**
 * dvb_create_media_graph - Creates media graph for the Digital TV part of the
 *                              device.
 *
 * @adap:                       pointer to struct dvb_adapter
 * @create_rf_connector:        if true, it creates the RF connector too
 *
 * This function checks all DVB-related functions at the media controller
 * entities and creates the needed links for the media graph. It is
 * capable of working with multiple tuners or multiple frontends, but it
 * won't create links if the device has multiple tuners and multiple frontends
 * or if the device has multiple muxes. In such case, the caller driver should
 * manually create the remaining links.
 */
__must_check int dvb_create_media_graph(struct dvb_adapter *adap,
					bool create_rf_connector);



static inline void dvb_register_media_controller(struct dvb_adapter *adap,
						 struct media_device *mdev)
{
	adap->mdev = mdev;
}

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static inline struct media_device

*dvb_get_media_controller(struct dvb_adapter *adap)
{
	return adap->mdev;
}
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#else

static inline

int dvb_create_media_graph(struct dvb_adapter *adap,
			   bool create_rf_connector)
{
	return 0;
}
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;

#define dvb_register_media_controller(a, b) {}

#define dvb_get_media_controller(a) NULL
#endif

int dvb_generic_open (struct inode *inode, struct file *file);
int dvb_generic_release (struct inode *inode, struct file *file);
long dvb_generic_ioctl (struct file *file,
			      unsigned int cmd, unsigned long arg);

/* we don't mess with video_usercopy() any more,
we simply define out own dvb_usercopy(), which will hopefully become
generic_usercopy()  someday... */

int dvb_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
		 int (*func)(struct file *file, unsigned int cmd, void *arg));

/** generic DVB attach function. */
#ifdef CONFIG_MEDIA_ATTACH

#define dvb_attach(FUNCTION, ARGS...) ({ \
        void *__r = NULL; \
        typeof(&FUNCTION) __a = symbol_request(FUNCTION); \
        if (__a) { \
                __r = (void *) __a(ARGS); \
                if (__r == NULL) \
                        symbol_put(FUNCTION); \
        } else { \
                printk(KERN_ERR "DVB: Unable to find symbol "#FUNCTION"()\n"); \
        } \
        __r; \
})


#define dvb_detach(FUNC)	symbol_put_addr(FUNC)

#else

#define dvb_attach(FUNCTION, ARGS...) ({ \
        FUNCTION(ARGS); \
})


#define dvb_detach(FUNC)	{}

#endif

#endif /* #ifndef _DVBDEV_H_ */
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Directory: drivers/media/dvb-core

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