78 lines
1.8 KiB
C
78 lines
1.8 KiB
C
|
/*
|
||
|
|
* uvc_debugfs.c -- USB Video Class driver - Debugging support
|
||
|
|
*
|
||
|
|
* Copyright (C) 2011
|
||
|
|
* Laurent Pinchart (laurent.pinchart@ideasonboard.com)
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or modify
|
||
|
|
* it under the terms of the GNU General Public License as published by
|
||
|
|
* the Free Software Foundation; either version 2 of the License, or
|
||
|
|
* (at your option) any later version.
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/module.h>
|
||
|
|
#include <linux/debugfs.h>
|
||
|
|
#include <linux/slab.h>
|
||
|
|
#include <linux/usb.h>
|
||
|
|
|
||
|
|
#include "uvcvideo.h"
|
||
|
|
|
||
|
|
/* -----------------------------------------------------------------------------
|
||
|
|
* Global and stream initialization/cleanup
|
||
|
|
*/
|
||
|
|
|
||
|
|
static struct dentry *uvc_debugfs_root_dir;
|
||
|
|
|
||
|
|
int uvc_debugfs_init_stream(struct uvc_streaming *stream)
|
||
|
|
{
|
||
|
|
struct usb_device *udev = stream->dev->udev;
|
||
|
|
struct dentry *dent;
|
||
|
|
char dir_name[32];
|
||
|
|
|
||
|
|
if (uvc_debugfs_root_dir == NULL)
|
||
|
|
return -ENODEV;
|
||
|
|
|
||
|
|
sprintf(dir_name, "%u-%u", udev->bus->busnum, udev->devnum);
|
||
|
|
|
||
|
|
dent = debugfs_create_dir(dir_name, uvc_debugfs_root_dir);
|
||
|
|
if (IS_ERR_OR_NULL(dent)) {
|
||
|
|
uvc_printk(KERN_INFO, "Unable to create debugfs %s directory.\n",
|
||
|
|
dir_name);
|
||
|
|
return -ENODEV;
|
||
|
|
}
|
||
|
|
|
||
|
|
stream->debugfs_dir = dent;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
void uvc_debugfs_cleanup_stream(struct uvc_streaming *stream)
|
||
|
|
{
|
||
|
|
if (stream->debugfs_dir == NULL)
|
||
|
|
return;
|
||
|
|
|
||
|
|
debugfs_remove_recursive(stream->debugfs_dir);
|
||
|
|
stream->debugfs_dir = NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
int uvc_debugfs_init(void)
|
||
|
|
{
|
||
|
|
struct dentry *dir;
|
||
|
|
|
||
|
|
dir = debugfs_create_dir("uvcvideo", usb_debug_root);
|
||
|
|
if (IS_ERR_OR_NULL(dir)) {
|
||
|
|
uvc_printk(KERN_INFO, "Unable to create debugfs directory\n");
|
||
|
|
return -ENODATA;
|
||
|
|
}
|
||
|
|
|
||
|
|
uvc_debugfs_root_dir = dir;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
void uvc_debugfs_cleanup(void)
|
||
|
|
{
|
||
|
|
if (uvc_debugfs_root_dir != NULL)
|
||
|
|
debugfs_remove_recursive(uvc_debugfs_root_dir);
|
||
|
|
}
|