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4647f48708
The dvb_attach() was unbalanced, as there was no dvb_dettach. Ok, on current cases, the dettach is done by dvbdev, but that are some future corner cases where we may need to do this before registering the frontend. So, add a dvb_detach() and use it at dvb_frontend.c. Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
151 lines
4.1 KiB
C
151 lines
4.1 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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#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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};
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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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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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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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