//------------------------------------------------------------------------------
// <copyright file="wlan_utils.c" company="Atheros">
//    Copyright (c) 2004-2010 Atheros Corporation.  All rights reserved.
// 
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
//
//
//------------------------------------------------------------------------------
//==============================================================================
// This module implements frequently used wlan utilies
//
// Author(s): ="Atheros"
//==============================================================================
#include <a_config.h>
#include <athdefs.h>
#include <a_types.h>
#include <a_osapi.h>

/*
 * converts ieee channel number to frequency
 */
A_UINT16
wlan_ieee2freq(int chan)
{
    if (chan == 14) {
        return 2484;
    }
    if (chan < 14) {    /* 0-13 */
        return (2407 + (chan*5));
    }
    if (chan < 27) {    /* 15-26 */
        return (2512 + ((chan-15)*20));
    }
    return (5000 + (chan*5));
}

/*
 * Converts MHz frequency to IEEE channel number.
 */
A_UINT32
wlan_freq2ieee(A_UINT16 freq)
{
    if (freq == 2484)
        return 14;
    if (freq < 2484)
        return (freq - 2407) / 5;
    if (freq < 5000)
        return 15 + ((freq - 2512) / 20);
    return (freq - 5000) / 5;
}