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/*
* 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);
}
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