diff options
Diffstat (limited to 'drivers/media/video/uvc/uvc_debugfs.c')
-rw-r--r-- | drivers/media/video/uvc/uvc_debugfs.c | 136 |
1 files changed, 0 insertions, 136 deletions
diff --git a/drivers/media/video/uvc/uvc_debugfs.c b/drivers/media/video/uvc/uvc_debugfs.c deleted file mode 100644 index 14561a5abb79..000000000000 --- a/drivers/media/video/uvc/uvc_debugfs.c +++ /dev/null @@ -1,136 +0,0 @@ -/* - * 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" - -/* ----------------------------------------------------------------------------- - * Statistics - */ - -#define UVC_DEBUGFS_BUF_SIZE 1024 - -struct uvc_debugfs_buffer { - size_t count; - char data[UVC_DEBUGFS_BUF_SIZE]; -}; - -static int uvc_debugfs_stats_open(struct inode *inode, struct file *file) -{ - struct uvc_streaming *stream = inode->i_private; - struct uvc_debugfs_buffer *buf; - - buf = kmalloc(sizeof(*buf), GFP_KERNEL); - if (buf == NULL) - return -ENOMEM; - - buf->count = uvc_video_stats_dump(stream, buf->data, sizeof(buf->data)); - - file->private_data = buf; - return 0; -} - -static ssize_t uvc_debugfs_stats_read(struct file *file, char __user *user_buf, - size_t nbytes, loff_t *ppos) -{ - struct uvc_debugfs_buffer *buf = file->private_data; - - return simple_read_from_buffer(user_buf, nbytes, ppos, buf->data, - buf->count); -} - -static int uvc_debugfs_stats_release(struct inode *inode, struct file *file) -{ - kfree(file->private_data); - file->private_data = NULL; - - return 0; -} - -static const struct file_operations uvc_debugfs_stats_fops = { - .owner = THIS_MODULE, - .open = uvc_debugfs_stats_open, - .llseek = no_llseek, - .read = uvc_debugfs_stats_read, - .release = uvc_debugfs_stats_release, -}; - -/* ----------------------------------------------------------------------------- - * 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; - - dent = debugfs_create_file("stats", 0444, stream->debugfs_dir, - stream, &uvc_debugfs_stats_fops); - if (IS_ERR_OR_NULL(dent)) { - uvc_printk(KERN_INFO, "Unable to create debugfs stats file.\n"); - uvc_debugfs_cleanup_stream(stream); - return -ENODEV; - } - - 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); -} |