mirror of https://github.com/hak5/openwrt.git
60 lines
1.3 KiB
C
60 lines
1.3 KiB
C
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/*
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* Copyright (c) 2004-2005 Atheros Communications Inc.
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* All rights reserved.
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*
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* This module implements frequently used wlan utilies
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*
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* $Id: //depot/sw/releases/olca2.0-GPL/host/wlan/src/wlan_utils.c#1 $
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation;
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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*
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*
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*/
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#include <a_config.h>
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#include <athdefs.h>
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#include <a_types.h>
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#include <a_osapi.h>
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/*
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* converts ieee channel number to frequency
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*/
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A_UINT16
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wlan_ieee2freq(int chan)
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{
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if (chan == 14) {
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return 2484;
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}
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if (chan < 14) { /* 0-13 */
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return (2407 + (chan*5));
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}
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if (chan < 27) { /* 15-26 */
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return (2512 + ((chan-15)*20));
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}
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return (5000 + (chan*5));
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}
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/*
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* Converts MHz frequency to IEEE channel number.
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*/
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A_UINT32
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wlan_freq2ieee(A_UINT16 freq)
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{
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if (freq == 2484)
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return 14;
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if (freq < 2484)
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return (freq - 2407) / 5;
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if (freq < 5000)
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return 15 + ((freq - 2512) / 20);
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return (freq - 5000) / 5;
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}
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