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1074 lines
24 KiB
1074 lines
24 KiB
// SPDX-License-Identifier: LGPL-2.1-or-later |
|
/* |
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* dvbdev.c |
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* |
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* Copyright (C) 2000 Ralph Metzler <[email protected]> |
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* & Marcus Metzler <[email protected]> |
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* for convergence integrated media GmbH |
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*/ |
|
|
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#define pr_fmt(fmt) "dvbdev: " fmt |
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|
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#include <linux/types.h> |
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#include <linux/errno.h> |
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#include <linux/string.h> |
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#include <linux/module.h> |
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#include <linux/kernel.h> |
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#include <linux/i2c.h> |
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#include <linux/init.h> |
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#include <linux/slab.h> |
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#include <linux/device.h> |
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#include <linux/fs.h> |
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#include <linux/cdev.h> |
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#include <linux/mutex.h> |
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#include <media/dvbdev.h> |
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|
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/* Due to enum tuner_pad_index */ |
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#include <media/tuner.h> |
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|
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static DEFINE_MUTEX(dvbdev_mutex); |
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static int dvbdev_debug; |
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|
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module_param(dvbdev_debug, int, 0644); |
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MODULE_PARM_DESC(dvbdev_debug, "Turn on/off device debugging (default:off)."); |
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|
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#define dprintk(fmt, arg...) do { \ |
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if (dvbdev_debug) \ |
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printk(KERN_DEBUG pr_fmt("%s: " fmt), \ |
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__func__, ##arg); \ |
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} while (0) |
|
|
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static LIST_HEAD(dvb_adapter_list); |
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static DEFINE_MUTEX(dvbdev_register_lock); |
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|
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static const char * const dnames[] = { |
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[DVB_DEVICE_VIDEO] = "video", |
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[DVB_DEVICE_AUDIO] = "audio", |
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[DVB_DEVICE_SEC] = "sec", |
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[DVB_DEVICE_FRONTEND] = "frontend", |
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[DVB_DEVICE_DEMUX] = "demux", |
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[DVB_DEVICE_DVR] = "dvr", |
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[DVB_DEVICE_CA] = "ca", |
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[DVB_DEVICE_NET] = "net", |
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[DVB_DEVICE_OSD] = "osd" |
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}; |
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|
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#ifdef CONFIG_DVB_DYNAMIC_MINORS |
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#define MAX_DVB_MINORS 256 |
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#define DVB_MAX_IDS MAX_DVB_MINORS |
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#else |
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#define DVB_MAX_IDS 4 |
|
|
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static const u8 minor_type[] = { |
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[DVB_DEVICE_VIDEO] = 0, |
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[DVB_DEVICE_AUDIO] = 1, |
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[DVB_DEVICE_SEC] = 2, |
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[DVB_DEVICE_FRONTEND] = 3, |
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[DVB_DEVICE_DEMUX] = 4, |
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[DVB_DEVICE_DVR] = 5, |
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[DVB_DEVICE_CA] = 6, |
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[DVB_DEVICE_NET] = 7, |
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[DVB_DEVICE_OSD] = 8, |
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}; |
|
|
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#define nums2minor(num, type, id) \ |
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(((num) << 6) | ((id) << 4) | minor_type[type]) |
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|
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#define MAX_DVB_MINORS (DVB_MAX_ADAPTERS*64) |
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#endif |
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|
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static struct class *dvb_class; |
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|
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static struct dvb_device *dvb_minors[MAX_DVB_MINORS]; |
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static DECLARE_RWSEM(minor_rwsem); |
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|
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static int dvb_device_open(struct inode *inode, struct file *file) |
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{ |
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struct dvb_device *dvbdev; |
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|
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mutex_lock(&dvbdev_mutex); |
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down_read(&minor_rwsem); |
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dvbdev = dvb_minors[iminor(inode)]; |
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|
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if (dvbdev && dvbdev->fops) { |
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int err = 0; |
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const struct file_operations *new_fops; |
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|
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new_fops = fops_get(dvbdev->fops); |
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if (!new_fops) |
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goto fail; |
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file->private_data = dvbdev; |
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replace_fops(file, new_fops); |
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if (file->f_op->open) |
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err = file->f_op->open(inode, file); |
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up_read(&minor_rwsem); |
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mutex_unlock(&dvbdev_mutex); |
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return err; |
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} |
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fail: |
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up_read(&minor_rwsem); |
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mutex_unlock(&dvbdev_mutex); |
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return -ENODEV; |
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} |
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|
|
|
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static const struct file_operations dvb_device_fops = |
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{ |
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.owner = THIS_MODULE, |
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.open = dvb_device_open, |
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.llseek = noop_llseek, |
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}; |
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|
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static struct cdev dvb_device_cdev; |
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|
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int dvb_generic_open(struct inode *inode, struct file *file) |
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{ |
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struct dvb_device *dvbdev = file->private_data; |
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|
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if (!dvbdev) |
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return -ENODEV; |
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|
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if (!dvbdev->users) |
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return -EBUSY; |
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|
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if ((file->f_flags & O_ACCMODE) == O_RDONLY) { |
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if (!dvbdev->readers) |
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return -EBUSY; |
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dvbdev->readers--; |
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} else { |
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if (!dvbdev->writers) |
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return -EBUSY; |
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dvbdev->writers--; |
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} |
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|
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dvbdev->users--; |
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return 0; |
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} |
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EXPORT_SYMBOL(dvb_generic_open); |
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|
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|
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int dvb_generic_release(struct inode *inode, struct file *file) |
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{ |
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struct dvb_device *dvbdev = file->private_data; |
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|
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if (!dvbdev) |
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return -ENODEV; |
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|
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if ((file->f_flags & O_ACCMODE) == O_RDONLY) { |
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dvbdev->readers++; |
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} else { |
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dvbdev->writers++; |
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} |
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|
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dvbdev->users++; |
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return 0; |
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} |
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EXPORT_SYMBOL(dvb_generic_release); |
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|
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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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struct dvb_device *dvbdev = file->private_data; |
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|
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if (!dvbdev) |
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return -ENODEV; |
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|
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if (!dvbdev->kernel_ioctl) |
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return -EINVAL; |
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|
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return dvb_usercopy(file, cmd, arg, dvbdev->kernel_ioctl); |
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} |
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EXPORT_SYMBOL(dvb_generic_ioctl); |
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|
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static int dvbdev_get_free_id (struct dvb_adapter *adap, int type) |
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{ |
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u32 id = 0; |
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|
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while (id < DVB_MAX_IDS) { |
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struct dvb_device *dev; |
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list_for_each_entry(dev, &adap->device_list, list_head) |
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if (dev->type == type && dev->id == id) |
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goto skip; |
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return id; |
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skip: |
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id++; |
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} |
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return -ENFILE; |
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} |
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|
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static void dvb_media_device_free(struct dvb_device *dvbdev) |
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{ |
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#if defined(CONFIG_MEDIA_CONTROLLER_DVB) |
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if (dvbdev->entity) { |
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media_device_unregister_entity(dvbdev->entity); |
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kfree(dvbdev->entity); |
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kfree(dvbdev->pads); |
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dvbdev->entity = NULL; |
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dvbdev->pads = NULL; |
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} |
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|
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if (dvbdev->tsout_entity) { |
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int i; |
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|
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for (i = 0; i < dvbdev->tsout_num_entities; i++) { |
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media_device_unregister_entity(&dvbdev->tsout_entity[i]); |
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kfree(dvbdev->tsout_entity[i].name); |
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} |
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kfree(dvbdev->tsout_entity); |
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kfree(dvbdev->tsout_pads); |
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dvbdev->tsout_entity = NULL; |
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dvbdev->tsout_pads = NULL; |
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|
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dvbdev->tsout_num_entities = 0; |
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} |
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|
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if (dvbdev->intf_devnode) { |
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media_devnode_remove(dvbdev->intf_devnode); |
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dvbdev->intf_devnode = NULL; |
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} |
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|
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if (dvbdev->adapter->conn) { |
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media_device_unregister_entity(dvbdev->adapter->conn); |
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kfree(dvbdev->adapter->conn); |
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dvbdev->adapter->conn = NULL; |
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kfree(dvbdev->adapter->conn_pads); |
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dvbdev->adapter->conn_pads = NULL; |
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} |
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#endif |
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} |
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|
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#if defined(CONFIG_MEDIA_CONTROLLER_DVB) |
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static int dvb_create_tsout_entity(struct dvb_device *dvbdev, |
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const char *name, int npads) |
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{ |
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int i, ret = 0; |
|
|
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dvbdev->tsout_pads = kcalloc(npads, sizeof(*dvbdev->tsout_pads), |
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GFP_KERNEL); |
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if (!dvbdev->tsout_pads) |
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return -ENOMEM; |
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|
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dvbdev->tsout_entity = kcalloc(npads, sizeof(*dvbdev->tsout_entity), |
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GFP_KERNEL); |
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if (!dvbdev->tsout_entity) |
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return -ENOMEM; |
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|
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dvbdev->tsout_num_entities = npads; |
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|
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for (i = 0; i < npads; i++) { |
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struct media_pad *pads = &dvbdev->tsout_pads[i]; |
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struct media_entity *entity = &dvbdev->tsout_entity[i]; |
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|
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entity->name = kasprintf(GFP_KERNEL, "%s #%d", name, i); |
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if (!entity->name) |
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return -ENOMEM; |
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entity->function = MEDIA_ENT_F_IO_DTV; |
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pads->flags = MEDIA_PAD_FL_SINK; |
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ret = media_entity_pads_init(entity, 1, pads); |
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if (ret < 0) |
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return ret; |
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|
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ret = media_device_register_entity(dvbdev->adapter->mdev, |
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entity); |
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if (ret < 0) |
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return ret; |
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} |
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return 0; |
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} |
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|
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#define DEMUX_TSOUT "demux-tsout" |
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#define DVR_TSOUT "dvr-tsout" |
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|
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static int dvb_create_media_entity(struct dvb_device *dvbdev, |
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int type, int demux_sink_pads) |
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{ |
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int i, ret, npads; |
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|
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switch (type) { |
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case DVB_DEVICE_FRONTEND: |
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npads = 2; |
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break; |
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case DVB_DEVICE_DVR: |
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ret = dvb_create_tsout_entity(dvbdev, DVR_TSOUT, |
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demux_sink_pads); |
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return ret; |
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case DVB_DEVICE_DEMUX: |
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npads = 1 + demux_sink_pads; |
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ret = dvb_create_tsout_entity(dvbdev, DEMUX_TSOUT, |
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demux_sink_pads); |
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if (ret < 0) |
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return ret; |
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break; |
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case DVB_DEVICE_CA: |
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npads = 2; |
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break; |
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case DVB_DEVICE_NET: |
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/* |
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* We should be creating entities for the MPE/ULE |
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* decapsulation hardware (or software implementation). |
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* |
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* However, the number of for the MPE/ULE decaps may not be |
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* fixed. As we don't have yet dynamic support for PADs at |
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* the Media Controller, let's not create the decap |
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* entities yet. |
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*/ |
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return 0; |
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default: |
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return 0; |
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} |
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dvbdev->entity = kzalloc(sizeof(*dvbdev->entity), GFP_KERNEL); |
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if (!dvbdev->entity) |
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return -ENOMEM; |
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dvbdev->entity->name = dvbdev->name; |
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|
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if (npads) { |
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dvbdev->pads = kcalloc(npads, sizeof(*dvbdev->pads), |
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GFP_KERNEL); |
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if (!dvbdev->pads) { |
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kfree(dvbdev->entity); |
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return -ENOMEM; |
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} |
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} |
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|
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switch (type) { |
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case DVB_DEVICE_FRONTEND: |
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dvbdev->entity->function = MEDIA_ENT_F_DTV_DEMOD; |
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dvbdev->pads[0].flags = MEDIA_PAD_FL_SINK; |
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dvbdev->pads[1].flags = MEDIA_PAD_FL_SOURCE; |
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break; |
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case DVB_DEVICE_DEMUX: |
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dvbdev->entity->function = MEDIA_ENT_F_TS_DEMUX; |
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dvbdev->pads[0].flags = MEDIA_PAD_FL_SINK; |
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for (i = 1; i < npads; i++) |
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dvbdev->pads[i].flags = MEDIA_PAD_FL_SOURCE; |
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break; |
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case DVB_DEVICE_CA: |
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dvbdev->entity->function = MEDIA_ENT_F_DTV_CA; |
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dvbdev->pads[0].flags = MEDIA_PAD_FL_SINK; |
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dvbdev->pads[1].flags = MEDIA_PAD_FL_SOURCE; |
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break; |
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default: |
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/* Should never happen, as the first switch prevents it */ |
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kfree(dvbdev->entity); |
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kfree(dvbdev->pads); |
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dvbdev->entity = NULL; |
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dvbdev->pads = NULL; |
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return 0; |
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} |
|
|
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if (npads) { |
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ret = media_entity_pads_init(dvbdev->entity, npads, dvbdev->pads); |
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if (ret) |
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return ret; |
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} |
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ret = media_device_register_entity(dvbdev->adapter->mdev, |
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dvbdev->entity); |
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if (ret) |
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return ret; |
|
|
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pr_info("%s: media entity '%s' registered.\n", |
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__func__, dvbdev->entity->name); |
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|
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return 0; |
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} |
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#endif |
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|
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static int dvb_register_media_device(struct dvb_device *dvbdev, |
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int type, int minor, |
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unsigned demux_sink_pads) |
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{ |
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#if defined(CONFIG_MEDIA_CONTROLLER_DVB) |
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struct media_link *link; |
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u32 intf_type; |
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int ret; |
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|
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if (!dvbdev->adapter->mdev) |
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return 0; |
|
|
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ret = dvb_create_media_entity(dvbdev, type, demux_sink_pads); |
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if (ret) |
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return ret; |
|
|
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switch (type) { |
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case DVB_DEVICE_FRONTEND: |
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intf_type = MEDIA_INTF_T_DVB_FE; |
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break; |
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case DVB_DEVICE_DEMUX: |
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intf_type = MEDIA_INTF_T_DVB_DEMUX; |
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break; |
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case DVB_DEVICE_DVR: |
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intf_type = MEDIA_INTF_T_DVB_DVR; |
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break; |
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case DVB_DEVICE_CA: |
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intf_type = MEDIA_INTF_T_DVB_CA; |
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break; |
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case DVB_DEVICE_NET: |
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intf_type = MEDIA_INTF_T_DVB_NET; |
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break; |
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default: |
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return 0; |
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} |
|
|
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dvbdev->intf_devnode = media_devnode_create(dvbdev->adapter->mdev, |
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intf_type, 0, |
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DVB_MAJOR, minor); |
|
|
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if (!dvbdev->intf_devnode) |
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return -ENOMEM; |
|
|
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/* |
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* Create the "obvious" link, e. g. the ones that represent |
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* a direct association between an interface and an entity. |
|
* Other links should be created elsewhere, like: |
|
* DVB FE intf -> tuner |
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* DVB demux intf -> dvr |
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*/ |
|
|
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if (!dvbdev->entity) |
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return 0; |
|
|
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link = media_create_intf_link(dvbdev->entity, |
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&dvbdev->intf_devnode->intf, |
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MEDIA_LNK_FL_ENABLED | |
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MEDIA_LNK_FL_IMMUTABLE); |
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if (!link) |
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return -ENOMEM; |
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#endif |
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return 0; |
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} |
|
|
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int dvb_register_device(struct dvb_adapter *adap, struct dvb_device **pdvbdev, |
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const struct dvb_device *template, void *priv, |
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enum dvb_device_type type, int demux_sink_pads) |
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{ |
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struct dvb_device *dvbdev; |
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struct file_operations *dvbdevfops; |
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struct device *clsdev; |
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int minor; |
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int id, ret; |
|
|
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mutex_lock(&dvbdev_register_lock); |
|
|
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if ((id = dvbdev_get_free_id (adap, type)) < 0){ |
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mutex_unlock(&dvbdev_register_lock); |
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*pdvbdev = NULL; |
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pr_err("%s: couldn't find free device id\n", __func__); |
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return -ENFILE; |
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} |
|
|
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*pdvbdev = dvbdev = kzalloc(sizeof(*dvbdev), GFP_KERNEL); |
|
|
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if (!dvbdev){ |
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mutex_unlock(&dvbdev_register_lock); |
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return -ENOMEM; |
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} |
|
|
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dvbdevfops = kmemdup(template->fops, sizeof(*dvbdevfops), GFP_KERNEL); |
|
|
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if (!dvbdevfops){ |
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kfree (dvbdev); |
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mutex_unlock(&dvbdev_register_lock); |
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return -ENOMEM; |
|
} |
|
|
|
memcpy(dvbdev, template, sizeof(struct dvb_device)); |
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dvbdev->type = type; |
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dvbdev->id = id; |
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dvbdev->adapter = adap; |
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dvbdev->priv = priv; |
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dvbdev->fops = dvbdevfops; |
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init_waitqueue_head (&dvbdev->wait_queue); |
|
|
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dvbdevfops->owner = adap->module; |
|
|
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list_add_tail (&dvbdev->list_head, &adap->device_list); |
|
|
|
down_write(&minor_rwsem); |
|
#ifdef CONFIG_DVB_DYNAMIC_MINORS |
|
for (minor = 0; minor < MAX_DVB_MINORS; minor++) |
|
if (dvb_minors[minor] == NULL) |
|
break; |
|
|
|
if (minor == MAX_DVB_MINORS) { |
|
list_del (&dvbdev->list_head); |
|
kfree(dvbdevfops); |
|
kfree(dvbdev); |
|
up_write(&minor_rwsem); |
|
mutex_unlock(&dvbdev_register_lock); |
|
return -EINVAL; |
|
} |
|
#else |
|
minor = nums2minor(adap->num, type, id); |
|
#endif |
|
|
|
dvbdev->minor = minor; |
|
dvb_minors[minor] = dvbdev; |
|
up_write(&minor_rwsem); |
|
|
|
ret = dvb_register_media_device(dvbdev, type, minor, demux_sink_pads); |
|
if (ret) { |
|
pr_err("%s: dvb_register_media_device failed to create the mediagraph\n", |
|
__func__); |
|
|
|
dvb_media_device_free(dvbdev); |
|
list_del (&dvbdev->list_head); |
|
kfree(dvbdevfops); |
|
kfree(dvbdev); |
|
mutex_unlock(&dvbdev_register_lock); |
|
return ret; |
|
} |
|
|
|
mutex_unlock(&dvbdev_register_lock); |
|
|
|
clsdev = device_create(dvb_class, adap->device, |
|
MKDEV(DVB_MAJOR, minor), |
|
dvbdev, "dvb%d.%s%d", adap->num, dnames[type], id); |
|
if (IS_ERR(clsdev)) { |
|
pr_err("%s: failed to create device dvb%d.%s%d (%ld)\n", |
|
__func__, adap->num, dnames[type], id, PTR_ERR(clsdev)); |
|
dvb_media_device_free(dvbdev); |
|
list_del (&dvbdev->list_head); |
|
kfree(dvbdevfops); |
|
kfree(dvbdev); |
|
return PTR_ERR(clsdev); |
|
} |
|
dprintk("DVB: register adapter%d/%s%d @ minor: %i (0x%02x)\n", |
|
adap->num, dnames[type], id, minor, minor); |
|
|
|
return 0; |
|
} |
|
EXPORT_SYMBOL(dvb_register_device); |
|
|
|
|
|
void dvb_remove_device(struct dvb_device *dvbdev) |
|
{ |
|
if (!dvbdev) |
|
return; |
|
|
|
down_write(&minor_rwsem); |
|
dvb_minors[dvbdev->minor] = NULL; |
|
up_write(&minor_rwsem); |
|
|
|
dvb_media_device_free(dvbdev); |
|
|
|
device_destroy(dvb_class, MKDEV(DVB_MAJOR, dvbdev->minor)); |
|
|
|
list_del (&dvbdev->list_head); |
|
} |
|
EXPORT_SYMBOL(dvb_remove_device); |
|
|
|
|
|
void dvb_free_device(struct dvb_device *dvbdev) |
|
{ |
|
if (!dvbdev) |
|
return; |
|
|
|
kfree (dvbdev->fops); |
|
kfree (dvbdev); |
|
} |
|
EXPORT_SYMBOL(dvb_free_device); |
|
|
|
|
|
void dvb_unregister_device(struct dvb_device *dvbdev) |
|
{ |
|
dvb_remove_device(dvbdev); |
|
dvb_free_device(dvbdev); |
|
} |
|
EXPORT_SYMBOL(dvb_unregister_device); |
|
|
|
|
|
#ifdef CONFIG_MEDIA_CONTROLLER_DVB |
|
|
|
static int dvb_create_io_intf_links(struct dvb_adapter *adap, |
|
struct media_interface *intf, |
|
char *name) |
|
{ |
|
struct media_device *mdev = adap->mdev; |
|
struct media_entity *entity; |
|
struct media_link *link; |
|
|
|
media_device_for_each_entity(entity, mdev) { |
|
if (entity->function == MEDIA_ENT_F_IO_DTV) { |
|
if (strncmp(entity->name, name, strlen(name))) |
|
continue; |
|
link = media_create_intf_link(entity, intf, |
|
MEDIA_LNK_FL_ENABLED | |
|
MEDIA_LNK_FL_IMMUTABLE); |
|
if (!link) |
|
return -ENOMEM; |
|
} |
|
} |
|
return 0; |
|
} |
|
|
|
int dvb_create_media_graph(struct dvb_adapter *adap, |
|
bool create_rf_connector) |
|
{ |
|
struct media_device *mdev = adap->mdev; |
|
struct media_entity *entity, *tuner = NULL, *demod = NULL, *conn; |
|
struct media_entity *demux = NULL, *ca = NULL; |
|
struct media_link *link; |
|
struct media_interface *intf; |
|
unsigned demux_pad = 0; |
|
unsigned dvr_pad = 0; |
|
unsigned ntuner = 0, ndemod = 0; |
|
int ret, pad_source, pad_sink; |
|
static const char *connector_name = "Television"; |
|
|
|
if (!mdev) |
|
return 0; |
|
|
|
media_device_for_each_entity(entity, mdev) { |
|
switch (entity->function) { |
|
case MEDIA_ENT_F_TUNER: |
|
tuner = entity; |
|
ntuner++; |
|
break; |
|
case MEDIA_ENT_F_DTV_DEMOD: |
|
demod = entity; |
|
ndemod++; |
|
break; |
|
case MEDIA_ENT_F_TS_DEMUX: |
|
demux = entity; |
|
break; |
|
case MEDIA_ENT_F_DTV_CA: |
|
ca = entity; |
|
break; |
|
} |
|
} |
|
|
|
/* |
|
* Prepare to signalize to media_create_pad_links() that multiple |
|
* entities of the same type exists and a 1:n or n:1 links need to be |
|
* created. |
|
* NOTE: if both tuner and demod have multiple instances, it is up |
|
* to the caller driver to create such links. |
|
*/ |
|
if (ntuner > 1) |
|
tuner = NULL; |
|
if (ndemod > 1) |
|
demod = NULL; |
|
|
|
if (create_rf_connector) { |
|
conn = kzalloc(sizeof(*conn), GFP_KERNEL); |
|
if (!conn) |
|
return -ENOMEM; |
|
adap->conn = conn; |
|
|
|
adap->conn_pads = kzalloc(sizeof(*adap->conn_pads), GFP_KERNEL); |
|
if (!adap->conn_pads) |
|
return -ENOMEM; |
|
|
|
conn->flags = MEDIA_ENT_FL_CONNECTOR; |
|
conn->function = MEDIA_ENT_F_CONN_RF; |
|
conn->name = connector_name; |
|
adap->conn_pads->flags = MEDIA_PAD_FL_SOURCE; |
|
|
|
ret = media_entity_pads_init(conn, 1, adap->conn_pads); |
|
if (ret) |
|
return ret; |
|
|
|
ret = media_device_register_entity(mdev, conn); |
|
if (ret) |
|
return ret; |
|
|
|
if (!ntuner) { |
|
ret = media_create_pad_links(mdev, |
|
MEDIA_ENT_F_CONN_RF, |
|
conn, 0, |
|
MEDIA_ENT_F_DTV_DEMOD, |
|
demod, 0, |
|
MEDIA_LNK_FL_ENABLED, |
|
false); |
|
} else { |
|
pad_sink = media_get_pad_index(tuner, true, |
|
PAD_SIGNAL_ANALOG); |
|
if (pad_sink < 0) |
|
return -EINVAL; |
|
ret = media_create_pad_links(mdev, |
|
MEDIA_ENT_F_CONN_RF, |
|
conn, 0, |
|
MEDIA_ENT_F_TUNER, |
|
tuner, pad_sink, |
|
MEDIA_LNK_FL_ENABLED, |
|
false); |
|
} |
|
if (ret) |
|
return ret; |
|
} |
|
|
|
if (ntuner && ndemod) { |
|
/* NOTE: first found tuner source pad presumed correct */ |
|
pad_source = media_get_pad_index(tuner, false, |
|
PAD_SIGNAL_ANALOG); |
|
if (pad_source < 0) |
|
return -EINVAL; |
|
ret = media_create_pad_links(mdev, |
|
MEDIA_ENT_F_TUNER, |
|
tuner, pad_source, |
|
MEDIA_ENT_F_DTV_DEMOD, |
|
demod, 0, MEDIA_LNK_FL_ENABLED, |
|
false); |
|
if (ret) |
|
return ret; |
|
} |
|
|
|
if (ndemod && demux) { |
|
ret = media_create_pad_links(mdev, |
|
MEDIA_ENT_F_DTV_DEMOD, |
|
demod, 1, |
|
MEDIA_ENT_F_TS_DEMUX, |
|
demux, 0, MEDIA_LNK_FL_ENABLED, |
|
false); |
|
if (ret) |
|
return ret; |
|
} |
|
if (demux && ca) { |
|
ret = media_create_pad_link(demux, 1, ca, |
|
0, MEDIA_LNK_FL_ENABLED); |
|
if (ret) |
|
return ret; |
|
} |
|
|
|
/* Create demux links for each ringbuffer/pad */ |
|
if (demux) { |
|
media_device_for_each_entity(entity, mdev) { |
|
if (entity->function == MEDIA_ENT_F_IO_DTV) { |
|
if (!strncmp(entity->name, DVR_TSOUT, |
|
strlen(DVR_TSOUT))) { |
|
ret = media_create_pad_link(demux, |
|
++dvr_pad, |
|
entity, 0, 0); |
|
if (ret) |
|
return ret; |
|
} |
|
if (!strncmp(entity->name, DEMUX_TSOUT, |
|
strlen(DEMUX_TSOUT))) { |
|
ret = media_create_pad_link(demux, |
|
++demux_pad, |
|
entity, 0, 0); |
|
if (ret) |
|
return ret; |
|
} |
|
} |
|
} |
|
} |
|
|
|
/* Create interface links for FE->tuner, DVR->demux and CA->ca */ |
|
media_device_for_each_intf(intf, mdev) { |
|
if (intf->type == MEDIA_INTF_T_DVB_CA && ca) { |
|
link = media_create_intf_link(ca, intf, |
|
MEDIA_LNK_FL_ENABLED | |
|
MEDIA_LNK_FL_IMMUTABLE); |
|
if (!link) |
|
return -ENOMEM; |
|
} |
|
|
|
if (intf->type == MEDIA_INTF_T_DVB_FE && tuner) { |
|
link = media_create_intf_link(tuner, intf, |
|
MEDIA_LNK_FL_ENABLED | |
|
MEDIA_LNK_FL_IMMUTABLE); |
|
if (!link) |
|
return -ENOMEM; |
|
} |
|
#if 0 |
|
/* |
|
* Indirect link - let's not create yet, as we don't know how |
|
* to handle indirect links, nor if this will |
|
* actually be needed. |
|
*/ |
|
if (intf->type == MEDIA_INTF_T_DVB_DVR && demux) { |
|
link = media_create_intf_link(demux, intf, |
|
MEDIA_LNK_FL_ENABLED | |
|
MEDIA_LNK_FL_IMMUTABLE); |
|
if (!link) |
|
return -ENOMEM; |
|
} |
|
#endif |
|
if (intf->type == MEDIA_INTF_T_DVB_DVR) { |
|
ret = dvb_create_io_intf_links(adap, intf, DVR_TSOUT); |
|
if (ret) |
|
return ret; |
|
} |
|
if (intf->type == MEDIA_INTF_T_DVB_DEMUX) { |
|
ret = dvb_create_io_intf_links(adap, intf, DEMUX_TSOUT); |
|
if (ret) |
|
return ret; |
|
} |
|
} |
|
return 0; |
|
} |
|
EXPORT_SYMBOL_GPL(dvb_create_media_graph); |
|
#endif |
|
|
|
static int dvbdev_check_free_adapter_num(int num) |
|
{ |
|
struct list_head *entry; |
|
list_for_each(entry, &dvb_adapter_list) { |
|
struct dvb_adapter *adap; |
|
adap = list_entry(entry, struct dvb_adapter, list_head); |
|
if (adap->num == num) |
|
return 0; |
|
} |
|
return 1; |
|
} |
|
|
|
static int dvbdev_get_free_adapter_num (void) |
|
{ |
|
int num = 0; |
|
|
|
while (num < DVB_MAX_ADAPTERS) { |
|
if (dvbdev_check_free_adapter_num(num)) |
|
return num; |
|
num++; |
|
} |
|
|
|
return -ENFILE; |
|
} |
|
|
|
|
|
int dvb_register_adapter(struct dvb_adapter *adap, const char *name, |
|
struct module *module, struct device *device, |
|
short *adapter_nums) |
|
{ |
|
int i, num; |
|
|
|
mutex_lock(&dvbdev_register_lock); |
|
|
|
for (i = 0; i < DVB_MAX_ADAPTERS; ++i) { |
|
num = adapter_nums[i]; |
|
if (num >= 0 && num < DVB_MAX_ADAPTERS) { |
|
/* use the one the driver asked for */ |
|
if (dvbdev_check_free_adapter_num(num)) |
|
break; |
|
} else { |
|
num = dvbdev_get_free_adapter_num(); |
|
break; |
|
} |
|
num = -1; |
|
} |
|
|
|
if (num < 0) { |
|
mutex_unlock(&dvbdev_register_lock); |
|
return -ENFILE; |
|
} |
|
|
|
memset (adap, 0, sizeof(struct dvb_adapter)); |
|
INIT_LIST_HEAD (&adap->device_list); |
|
|
|
pr_info("DVB: registering new adapter (%s)\n", name); |
|
|
|
adap->num = num; |
|
adap->name = name; |
|
adap->module = module; |
|
adap->device = device; |
|
adap->mfe_shared = 0; |
|
adap->mfe_dvbdev = NULL; |
|
mutex_init (&adap->mfe_lock); |
|
|
|
#ifdef CONFIG_MEDIA_CONTROLLER_DVB |
|
mutex_init(&adap->mdev_lock); |
|
#endif |
|
|
|
list_add_tail (&adap->list_head, &dvb_adapter_list); |
|
|
|
mutex_unlock(&dvbdev_register_lock); |
|
|
|
return num; |
|
} |
|
EXPORT_SYMBOL(dvb_register_adapter); |
|
|
|
|
|
int dvb_unregister_adapter(struct dvb_adapter *adap) |
|
{ |
|
mutex_lock(&dvbdev_register_lock); |
|
list_del (&adap->list_head); |
|
mutex_unlock(&dvbdev_register_lock); |
|
return 0; |
|
} |
|
EXPORT_SYMBOL(dvb_unregister_adapter); |
|
|
|
/* if the miracle happens and "generic_usercopy()" is included into |
|
the kernel, then this can vanish. please don't make the mistake and |
|
define this as video_usercopy(). this will introduce a dependency |
|
to the v4l "videodev.o" module, which is unnecessary for some |
|
cards (ie. the budget dvb-cards don't need the v4l module...) */ |
|
int dvb_usercopy(struct file *file, |
|
unsigned int cmd, unsigned long arg, |
|
int (*func)(struct file *file, |
|
unsigned int cmd, void *arg)) |
|
{ |
|
char sbuf[128]; |
|
void *mbuf = NULL; |
|
void *parg = NULL; |
|
int err = -EINVAL; |
|
|
|
/* Copy arguments into temp kernel buffer */ |
|
switch (_IOC_DIR(cmd)) { |
|
case _IOC_NONE: |
|
/* |
|
* For this command, the pointer is actually an integer |
|
* argument. |
|
*/ |
|
parg = (void *) arg; |
|
break; |
|
case _IOC_READ: /* some v4l ioctls are marked wrong ... */ |
|
case _IOC_WRITE: |
|
case (_IOC_WRITE | _IOC_READ): |
|
if (_IOC_SIZE(cmd) <= sizeof(sbuf)) { |
|
parg = sbuf; |
|
} else { |
|
/* too big to allocate from stack */ |
|
mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL); |
|
if (NULL == mbuf) |
|
return -ENOMEM; |
|
parg = mbuf; |
|
} |
|
|
|
err = -EFAULT; |
|
if (copy_from_user(parg, (void __user *)arg, _IOC_SIZE(cmd))) |
|
goto out; |
|
break; |
|
} |
|
|
|
/* call driver */ |
|
if ((err = func(file, cmd, parg)) == -ENOIOCTLCMD) |
|
err = -ENOTTY; |
|
|
|
if (err < 0) |
|
goto out; |
|
|
|
/* Copy results into user buffer */ |
|
switch (_IOC_DIR(cmd)) |
|
{ |
|
case _IOC_READ: |
|
case (_IOC_WRITE | _IOC_READ): |
|
if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd))) |
|
err = -EFAULT; |
|
break; |
|
} |
|
|
|
out: |
|
kfree(mbuf); |
|
return err; |
|
} |
|
|
|
#if IS_ENABLED(CONFIG_I2C) |
|
struct i2c_client *dvb_module_probe(const char *module_name, |
|
const char *name, |
|
struct i2c_adapter *adap, |
|
unsigned char addr, |
|
void *platform_data) |
|
{ |
|
struct i2c_client *client; |
|
struct i2c_board_info *board_info; |
|
|
|
board_info = kzalloc(sizeof(*board_info), GFP_KERNEL); |
|
if (!board_info) |
|
return NULL; |
|
|
|
if (name) |
|
strscpy(board_info->type, name, I2C_NAME_SIZE); |
|
else |
|
strscpy(board_info->type, module_name, I2C_NAME_SIZE); |
|
|
|
board_info->addr = addr; |
|
board_info->platform_data = platform_data; |
|
request_module(module_name); |
|
client = i2c_new_client_device(adap, board_info); |
|
if (!i2c_client_has_driver(client)) { |
|
kfree(board_info); |
|
return NULL; |
|
} |
|
|
|
if (!try_module_get(client->dev.driver->owner)) { |
|
i2c_unregister_device(client); |
|
client = NULL; |
|
} |
|
|
|
kfree(board_info); |
|
return client; |
|
} |
|
EXPORT_SYMBOL_GPL(dvb_module_probe); |
|
|
|
void dvb_module_release(struct i2c_client *client) |
|
{ |
|
if (!client) |
|
return; |
|
|
|
module_put(client->dev.driver->owner); |
|
i2c_unregister_device(client); |
|
} |
|
EXPORT_SYMBOL_GPL(dvb_module_release); |
|
#endif |
|
|
|
static int dvb_uevent(struct device *dev, struct kobj_uevent_env *env) |
|
{ |
|
struct dvb_device *dvbdev = dev_get_drvdata(dev); |
|
|
|
add_uevent_var(env, "DVB_ADAPTER_NUM=%d", dvbdev->adapter->num); |
|
add_uevent_var(env, "DVB_DEVICE_TYPE=%s", dnames[dvbdev->type]); |
|
add_uevent_var(env, "DVB_DEVICE_NUM=%d", dvbdev->id); |
|
return 0; |
|
} |
|
|
|
static char *dvb_devnode(struct device *dev, umode_t *mode) |
|
{ |
|
struct dvb_device *dvbdev = dev_get_drvdata(dev); |
|
|
|
return kasprintf(GFP_KERNEL, "dvb/adapter%d/%s%d", |
|
dvbdev->adapter->num, dnames[dvbdev->type], dvbdev->id); |
|
} |
|
|
|
|
|
static int __init init_dvbdev(void) |
|
{ |
|
int retval; |
|
dev_t dev = MKDEV(DVB_MAJOR, 0); |
|
|
|
if ((retval = register_chrdev_region(dev, MAX_DVB_MINORS, "DVB")) != 0) { |
|
pr_err("dvb-core: unable to get major %d\n", DVB_MAJOR); |
|
return retval; |
|
} |
|
|
|
cdev_init(&dvb_device_cdev, &dvb_device_fops); |
|
if ((retval = cdev_add(&dvb_device_cdev, dev, MAX_DVB_MINORS)) != 0) { |
|
pr_err("dvb-core: unable register character device\n"); |
|
goto error; |
|
} |
|
|
|
dvb_class = class_create(THIS_MODULE, "dvb"); |
|
if (IS_ERR(dvb_class)) { |
|
retval = PTR_ERR(dvb_class); |
|
goto error; |
|
} |
|
dvb_class->dev_uevent = dvb_uevent; |
|
dvb_class->devnode = dvb_devnode; |
|
return 0; |
|
|
|
error: |
|
cdev_del(&dvb_device_cdev); |
|
unregister_chrdev_region(dev, MAX_DVB_MINORS); |
|
return retval; |
|
} |
|
|
|
|
|
static void __exit exit_dvbdev(void) |
|
{ |
|
class_destroy(dvb_class); |
|
cdev_del(&dvb_device_cdev); |
|
unregister_chrdev_region(MKDEV(DVB_MAJOR, 0), MAX_DVB_MINORS); |
|
} |
|
|
|
subsys_initcall(init_dvbdev); |
|
module_exit(exit_dvbdev); |
|
|
|
MODULE_DESCRIPTION("DVB Core Driver"); |
|
MODULE_AUTHOR("Marcus Metzler, Ralph Metzler, Holger Waechtler"); |
|
MODULE_LICENSE("GPL");
|
|
|