1 //------------------------------------------------------------------------------
2 // <copyright file="wlan_utils.c" company="Atheros">
3 // Copyright (c) 2004-2010 Atheros Corporation. All rights reserved.
6 // Permission to use, copy, modify, and/or distribute this software for any
7 // purpose with or without fee is hereby granted, provided that the above
8 // copyright notice and this permission notice appear in all copies.
10 // THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 // WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 // MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 // ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 // WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 // ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 // OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
19 //------------------------------------------------------------------------------
20 //==============================================================================
21 // This module implements frequently used wlan utilies
23 // Author(s): ="Atheros"
24 //==============================================================================
31 * converts ieee channel number to frequency
34 wlan_ieee2freq(int chan)
39 if (chan < 14) { /* 0-13 */
40 return (2407 + (chan*5));
42 if (chan < 27) { /* 15-26 */
43 return (2512 + ((chan-15)*20));
45 return (5000 + (chan*5));
49 * Converts MHz frequency to IEEE channel number.
52 wlan_freq2ieee(A_UINT16 freq)
57 return (freq - 2407) / 5;
59 return 15 + ((freq - 2512) / 20);
60 return (freq - 5000) / 5;