59 lines
1.3 KiB
C
59 lines
1.3 KiB
C
/*
|
|
* Copyright (c) 2004-2005 Atheros Communications Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This module implements frequently used wlan utilies
|
|
*
|
|
* $Id: //depot/sw/releases/olca2.0-GPL/host/wlan/src/wlan_utils.c#1 $
|
|
*
|
|
*
|
|
* 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;
|
|
*
|
|
* Software distributed under the License is distributed on an "AS
|
|
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
|
|
* implied. See the License for the specific language governing
|
|
* rights and limitations under the License.
|
|
*
|
|
*
|
|
*
|
|
*/
|
|
|
|
#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;
|
|
}
|