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/*
* Misc utility routines used by kernel or app-level.
* Contents are wifi-specific, used by any kernel or app-level
* software that might want wifi things as it grows.
*
* Copyright (C) 1999-2010, Broadcom Corporation
*
* Unless you and Broadcom execute a separate written software license
* agreement governing use of this software, this software is licensed to you
* under the terms of the GNU General Public License version 2 (the "GPL"),
* available at http://www.broadcom.com/licenses/GPLv2.php, with the
* following added to such license:
*
* As a special exception, the copyright holders of this software give you
* permission to link this software with independent modules, and to copy and
* distribute the resulting executable under terms of your choice, provided that
* you also meet, for each linked independent module, the terms and conditions of
* the license of that module. An independent module is a module which is not
* derived from this software. The special exception does not apply to any
* modifications of the software.
*
* Notwithstanding the above, under no circumstances may you combine this
* software in any way with any other Broadcom software provided under a license
* other than the GPL, without Broadcom's express prior written consent.
* $Id: bcmwifi.c,v 1.18.24.2.4.1 2009/09/25 00:32:01 Exp $
*/
#include <typedefs.h>
#ifdef BCMDRIVER
#include <osl.h>
#include <bcmutils.h>
#define strtoul(nptr, endptr, base) bcm_strtoul((nptr), (endptr), (base))
#define tolower(c) (bcm_isupper((c)) ? ((c) + 'a' - 'A') : (c))
#else
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#endif
#include <bcmwifi.h>
#if defined(WIN32) && (defined(BCMDLL) || defined(WLMDLL))
#include <bcmstdlib.h>
#endif
char *
wf_chspec_ntoa(chanspec_t chspec, char *buf)
{
const char *band, *bw, *sb;
uint channel;
band = "";
bw = "";
sb = "";
channel = CHSPEC_CHANNEL(chspec);
if ((CHSPEC_IS2G(chspec) && channel > CH_MAX_2G_CHANNEL) ||
(CHSPEC_IS5G(chspec) && channel <= CH_MAX_2G_CHANNEL))
band = (CHSPEC_IS2G(chspec)) ? "b" : "a";
if (CHSPEC_IS40(chspec)) {
if (CHSPEC_SB_UPPER(chspec)) {
sb = "u";
channel += CH_10MHZ_APART;
} else {
sb = "l";
channel -= CH_10MHZ_APART;
}
} else if (CHSPEC_IS10(chspec)) {
bw = "n";
}
snprintf(buf, 6, "%d%s%s%s", channel, band, bw, sb);
return (buf);
}
chanspec_t
wf_chspec_aton(char *a)
{
char *endp = NULL;
uint channel, band, bw, ctl_sb;
char c;
channel = strtoul(a, &endp, 10);
if (endp == a)
return 0;
if (channel > MAXCHANNEL)
return 0;
band = ((channel <= CH_MAX_2G_CHANNEL) ? WL_CHANSPEC_BAND_2G : WL_CHANSPEC_BAND_5G);
bw = WL_CHANSPEC_BW_20;
ctl_sb = WL_CHANSPEC_CTL_SB_NONE;
a = endp;
c = tolower(a[0]);
if (c == '\0')
goto done;
if (c == 'a' || c == 'b') {
band = (c == 'a') ? WL_CHANSPEC_BAND_5G : WL_CHANSPEC_BAND_2G;
a++;
c = tolower(a[0]);
if (c == '\0')
goto done;
}
if (c == 'n') {
bw = WL_CHANSPEC_BW_10;
} else if (c == 'l') {
bw = WL_CHANSPEC_BW_40;
ctl_sb = WL_CHANSPEC_CTL_SB_LOWER;
if (channel <= (MAXCHANNEL - CH_20MHZ_APART))
channel += CH_10MHZ_APART;
else
return 0;
} else if (c == 'u') {
bw = WL_CHANSPEC_BW_40;
ctl_sb = WL_CHANSPEC_CTL_SB_UPPER;
if (channel > CH_20MHZ_APART)
channel -= CH_10MHZ_APART;
else
return 0;
} else {
return 0;
}
done:
return (channel | band | bw | ctl_sb);
}
int
wf_mhz2channel(uint freq, uint start_factor)
{
int ch = -1;
uint base;
int offset;
if (start_factor == 0) {
if (freq >= 2400 && freq <= 2500)
start_factor = WF_CHAN_FACTOR_2_4_G;
else if (freq >= 5000 && freq <= 6000)
start_factor = WF_CHAN_FACTOR_5_G;
}
if (freq == 2484 && start_factor == WF_CHAN_FACTOR_2_4_G)
return 14;
base = start_factor / 2;
if ((freq < base) || (freq > base + 1000))
return -1;
offset = freq - base;
ch = offset / 5;
if (offset != (ch * 5))
return -1;
if (start_factor == WF_CHAN_FACTOR_2_4_G && (ch < 1 || ch > 13))
return -1;
return ch;
}
int
wf_channel2mhz(uint ch, uint start_factor)
{
int freq;
if ((start_factor == WF_CHAN_FACTOR_2_4_G && (ch < 1 || ch > 14)) ||
(ch <= 200))
freq = -1;
if ((start_factor == WF_CHAN_FACTOR_2_4_G) && (ch == 14))
freq = 2484;
else
freq = ch * 5 + start_factor / 2;
return freq;
}
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