/*
   * cfg80211 debugfs
   *
   * Copyright 2009	Luis R. Rodriguez <lrodriguez@atheros.com>
   * Copyright 2007	Johannes Berg <johannes@sipsolutions.net>
   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License version 2 as
   * published by the Free Software Foundation.
   */

  #include <linux/slab.h>

  #include "core.h"
  #include "debugfs.h"

  #define DEBUGFS_READONLY_FILE(name, buflen, fmt, value...)		\
  static ssize_t name## _read(struct file *file, char __user *userbuf,	\
  			    size_t count, loff_t *ppos)			\
  {									\
  	struct wiphy *wiphy= file->private_data;		\
  	char buf[buflen];						\
  	int res;							\
  									\
  	res = scnprintf(buf, buflen, fmt "
  ", ##value);		\
  	return simple_read_from_buffer(userbuf, count, ppos, buf, res);	\
  }									\
  									\
  static const struct file_operations name## _ops = {			\
  	.read = name## _read,						\

  	.open = simple_open,						\

  	.llseek = generic_file_llseek,					\

  };
  
  DEBUGFS_READONLY_FILE(rts_threshold, 20, "%d",
  		      wiphy->rts_threshold)
  DEBUGFS_READONLY_FILE(fragmentation_threshold, 20, "%d",
  		      wiphy->frag_threshold);
  DEBUGFS_READONLY_FILE(short_retry_limit, 20, "%d",
  		      wiphy->retry_short)
  DEBUGFS_READONLY_FILE(long_retry_limit, 20, "%d",
  		      wiphy->retry_long);

  static int ht_print_chan(struct ieee80211_channel *chan,
  			 char *buf, int buf_size, int offset)
  {
  	if (WARN_ON(offset > buf_size))
  		return 0;
  
  	if (chan->flags & IEEE80211_CHAN_DISABLED)
  		return snprintf(buf + offset,
  				buf_size - offset,
  				"%d Disabled
  ",
  				chan->center_freq);
  
  	return snprintf(buf + offset,
  			buf_size - offset,
  			"%d HT40 %c%c
  ",
  			chan->center_freq,
  			(chan->flags & IEEE80211_CHAN_NO_HT40MINUS) ? ' ' : '-',
  			(chan->flags & IEEE80211_CHAN_NO_HT40PLUS)  ? ' ' : '+');
  }
  
  static ssize_t ht40allow_map_read(struct file *file,
  				  char __user *user_buf,
  				  size_t count, loff_t *ppos)
  {
  	struct wiphy *wiphy = file->private_data;
  	char *buf;
  	unsigned int offset = 0, buf_size = PAGE_SIZE, i, r;
  	enum ieee80211_band band;
  	struct ieee80211_supported_band *sband;
  
  	buf = kzalloc(buf_size, GFP_KERNEL);
  	if (!buf)
  		return -ENOMEM;
  
  	mutex_lock(&cfg80211_mutex);
  
  	for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
  		sband = wiphy->bands[band];
  		if (!sband)
  			continue;
  		for (i = 0; i < sband->n_channels; i++)
  			offset += ht_print_chan(&sband->channels[i],
  						buf, buf_size, offset);
  	}
  
  	mutex_unlock(&cfg80211_mutex);
  
  	r = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
  
  	kfree(buf);
  
  	return r;
  }
  
  static const struct file_operations ht40allow_map_ops = {
  	.read = ht40allow_map_read,

  	.open = simple_open,

  	.llseek = default_llseek,

  };

  #define DEBUGFS_ADD(name)						\

  	debugfs_create_file(#name, S_IRUGO, phyd, &rdev->wiphy, &name## _ops);

  void cfg80211_debugfs_rdev_add(struct cfg80211_registered_device *rdev)

  {

  	struct dentry *phyd = rdev->wiphy.debugfsdir;

  
  	DEBUGFS_ADD(rts_threshold);
  	DEBUGFS_ADD(fragmentation_threshold);
  	DEBUGFS_ADD(short_retry_limit);
  	DEBUGFS_ADD(long_retry_limit);

  	DEBUGFS_ADD(ht40allow_map);

  }