| 1 | /* |
| 2 | * Copyright (c) 2004-2005 Atheros Communications Inc. |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * This module implements frequently used wlan utilies |
| 6 | * |
| 7 | * $Id: //depot/sw/releases/olca2.0-GPL/host/wlan/src/wlan_utils.c#1 $ |
| 8 | * |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License version 2 as |
| 12 | * published by the Free Software Foundation; |
| 13 | * |
| 14 | * Software distributed under the License is distributed on an "AS |
| 15 | * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or |
| 16 | * implied. See the License for the specific language governing |
| 17 | * rights and limitations under the License. |
| 18 | * |
| 19 | * |
| 20 | * |
| 21 | */ |
| 22 | |
| 23 | #include <a_config.h> |
| 24 | #include <athdefs.h> |
| 25 | #include <a_types.h> |
| 26 | #include <a_osapi.h> |
| 27 | |
| 28 | /* |
| 29 | * converts ieee channel number to frequency |
| 30 | */ |
| 31 | A_UINT16 |
| 32 | wlan_ieee2freq(int chan) |
| 33 | { |
| 34 | if (chan == 14) { |
| 35 | return 2484; |
| 36 | } |
| 37 | if (chan < 14) { /* 0-13 */ |
| 38 | return (2407 + (chan*5)); |
| 39 | } |
| 40 | if (chan < 27) { /* 15-26 */ |
| 41 | return (2512 + ((chan-15)*20)); |
| 42 | } |
| 43 | return (5000 + (chan*5)); |
| 44 | } |
| 45 | |
| 46 | /* |
| 47 | * Converts MHz frequency to IEEE channel number. |
| 48 | */ |
| 49 | A_UINT32 |
| 50 | wlan_freq2ieee(A_UINT16 freq) |
| 51 | { |
| 52 | if (freq == 2484) |
| 53 | return 14; |
| 54 | if (freq < 2484) |
| 55 | return (freq - 2407) / 5; |
| 56 | if (freq < 5000) |
| 57 | return 15 + ((freq - 2512) / 20); |
| 58 | return (freq - 5000) / 5; |
| 59 | } |
| 60 | |
