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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 2007, Broadcom Corporation
* All Rights Reserved.
*
* This is UNPUBLISHED PROPRIETARY SOURCE CODE of Broadcom Corporation;
* the contents of this file may not be disclosed to third parties, copied
* or duplicated in any form, in whole or in part, without the prior
* written permission of Broadcom Corporation.
* $Id: bcmwifi.c,v 1.1.1.1 2008/07/21 09:20:53 james26_jang 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 /* BCMDRIVER */
#include <bcmwifi.h>
/* Chanspec ASCII representation:
* <channel><band><bandwidth><ctl-sideband>
* digit [AB] N [UL]
*
* <channel>: channel number of the 10MHz or 20MHz channel,
* or control sideband channel of 40MHz channel.
* <band>: A for 5GHz, B for 2.4GHz
* <bandwidth>: N for 10MHz, nothing for 20MHz or 40MHz
* (ctl-sideband spec implies 40MHz)
* <ctl-sideband>: U for upper, L for lower
*
* <band> may be omitted on input, and will be assumed to be
* 2.4GHz if channel number <= 14.
*
* Examples: ...
*/
/* given a chanspec and a string buffer, format the chanspec as a
* string, and return the original pointer a. On error, return's NULL
*/
char *
wf_chspec_ntoa(chanspec_t chspec, char *buf)
{
const char *band, *bw, *sb;
uint channel;
bw = "";
sb = "";
channel = CHSPEC_CHANNEL(chspec);
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";
}
sprintf(buf, "%d%s%s%s", channel, band, bw, sb);
return (buf);
}
/* given a chanspec string, convert to a chanspec.
* On error, return 0
*/
chanspec_t
wf_chspec_aton(char *a)
{
char *endp;
uint channel, band, bw, ctl_sb;
bool band_set = FALSE, bw_set = FALSE, ctl_sb_set = FALSE;
int error = 0;
channel = strtoul(a, &endp, 10);
if (endp == a)
return 0;
if (channel > MAXCHANNEL)
return 0;
band = ((channel <= WLC_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;
while (*a != 0 && error != -1) {
switch (tolower((int)*a)) {
case 'a':
case 'b':
if (!band_set) {
band = (tolower((int)*a) == 'a') ?
WL_CHANSPEC_BAND_5G : WL_CHANSPEC_BAND_2G;
band_set = TRUE;
} else {
error = -1;
}
break;
case 'n':
if (!bw_set) {
bw = WL_CHANSPEC_BW_10;
bw_set = TRUE;
} else {
error = -1;
}
break;
case 'l':
case 'u':
if (!ctl_sb_set && !bw_set) {
ctl_sb = (tolower((int)*a) == 'l') ?
WL_CHANSPEC_CTL_SB_LOWER : WL_CHANSPEC_CTL_SB_UPPER;
ctl_sb_set = TRUE;
if (ctl_sb == WL_CHANSPEC_CTL_SB_LOWER)
channel = UPPER_20_SB(channel);
else
channel = LOWER_20_SB(channel);
bw = WL_CHANSPEC_BW_40;
bw_set = TRUE;
} else if (bw_set) {
error = -1;
} else {
error = -1;
}
break;
default:
error = -1;
break;
}
a++;
}
if (bw_set && (bw == WL_CHANSPEC_BW_40) && !ctl_sb_set)
error = -1;
if (ctl_sb_set && !bw_set)
error = -1;
if (!error)
return ((channel | band | bw | ctl_sb));
return 0;
}
#ifdef CONFIG_NET_RADIO
/* channel info structure */
typedef struct {
uint chan; /* channel number */
uint freq; /* in Mhz */
} chan_info_t;
static chan_info_t chan_info[] = {
/* B channels */
{ 1, 2412},
{ 2, 2417},
{ 3, 2422},
{ 4, 2427},
{ 5, 2432},
{ 6, 2437},
{ 7, 2442},
{ 8, 2447},
{ 9, 2452},
{ 10, 2457},
{ 11, 2462},
{ 12, 2467},
{ 13, 2472},
{ 14, 2484},
/* A channels */
/* 11a usa low */
{ 36, 5180},
{ 40, 5200},
{ 44, 5220},
{ 48, 5240},
{ 52, 5260},
{ 56, 5280},
{ 60, 5300},
{ 64, 5320},
/* 11a Europe */
{ 100, 5500},
{ 104, 5520},
{ 108, 5540},
{ 112, 5560},
{ 116, 5580},
{ 120, 5600},
{ 124, 5620},
{ 128, 5640},
{ 132, 5660},
{ 136, 5680},
{ 140, 5700},
/* 11a usa high */
{ 149, 5745},
{ 153, 5765},
{ 157, 5785},
{ 161, 5805},
/* 11a japan */
{ 184, 4920},
{ 188, 4940},
{ 192, 4960},
{ 196, 4980},
{ 200, 5000},
{ 204, 5020},
{ 208, 5040},
{ 212, 5060},
{ 216, 5080}
};
uint
freq2channel(uint freq)
{
int i;
for (i = 0; i < (int)ARRAYSIZE(chan_info); i++) {
if (chan_info[i].freq == freq)
return (chan_info[i].chan);
}
return (0);
}
uint
channel2freq(uint channel)
{
uint i;
for (i = 0; i < ARRAYSIZE(chan_info); i++)
if (chan_info[i].chan == channel)
return (chan_info[i].freq);
return (0);
}
#endif /* CONFIG_NET_RADIO */
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