/* * 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 #include #include #include #include #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; } static inline struct media_device *dvb_get_media_controller(struct dvb_adapter *adap) { return adap->mdev; } #else static inline int dvb_create_media_graph(struct dvb_adapter *adap, bool create_rf_connector) { return 0; }; #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_ */