drivers/net/wireless/bcmdhd/bcmwifi_channels.c - kernel/common.git - Git at Google

 /*
  * 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) 1999-2012, 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_channels.c 309193 2012-01-19 00:03:57Z $
  */

 #include <bcm_cfg.h>
 #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>
 #ifndef ASSERT
 #define ASSERT(exp)
 #endif
 #endif

 #ifdef _bcmwifi_c_

 #include <bcmwifi.h>
 #else
 #include <bcmwifi_channels.h>
 #endif

 #if defined(WIN32) && (defined(BCMDLL) || defined(WLMDLL))
 #include <bcmstdlib.h>
 #endif

 #ifndef D11AC_IOTYPES


 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(const 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);
 }


 bool
 wf_chspec_malformed(chanspec_t chanspec)
 {

 	if (!CHSPEC_IS5G(chanspec) && !CHSPEC_IS2G(chanspec))
 		return TRUE;

 	if (!CHSPEC_IS40(chanspec) && !CHSPEC_IS20(chanspec))
 		return TRUE;


 	if (CHSPEC_IS20(chanspec)) {
 		if (!CHSPEC_SB_NONE(chanspec))
 			return TRUE;
 	} else {
 		if (!CHSPEC_SB_UPPER(chanspec) && !CHSPEC_SB_LOWER(chanspec))
 		return TRUE;
 	}

 	return FALSE;
 }


 uint8
 wf_chspec_ctlchan(chanspec_t chspec)
 {
 	uint8 ctl_chan;


 	if (CHSPEC_CTL_SB(chspec) == WL_CHANSPEC_CTL_SB_NONE) {
 		return CHSPEC_CHANNEL(chspec);
 	} else {

 		ASSERT(CHSPEC_BW(chspec) == WL_CHANSPEC_BW_40);

 		if (CHSPEC_CTL_SB(chspec) == WL_CHANSPEC_CTL_SB_UPPER) {

 			ctl_chan = UPPER_20_SB(CHSPEC_CHANNEL(chspec));
 		} else {
 			ASSERT(CHSPEC_CTL_SB(chspec) == WL_CHANSPEC_CTL_SB_LOWER);

 			ctl_chan = LOWER_20_SB(CHSPEC_CHANNEL(chspec));
 		}
 	}

 	return ctl_chan;
 }

 chanspec_t
 wf_chspec_ctlchspec(chanspec_t chspec)
 {
 	chanspec_t ctl_chspec = 0;
 	uint8 channel;

 	ASSERT(!wf_chspec_malformed(chspec));


 	if (CHSPEC_CTL_SB(chspec) == WL_CHANSPEC_CTL_SB_NONE) {
 		return chspec;
 	} else {
 		if (CHSPEC_CTL_SB(chspec) == WL_CHANSPEC_CTL_SB_UPPER) {
 			channel = UPPER_20_SB(CHSPEC_CHANNEL(chspec));
 		} else {
 			channel = LOWER_20_SB(CHSPEC_CHANNEL(chspec));
 		}
 		ctl_chspec = channel | WL_CHANSPEC_BW_20 | WL_CHANSPEC_CTL_SB_NONE;
 		ctl_chspec |= CHSPEC_BAND(chspec);
 	}
 	return ctl_chspec;
 }

 #else


 static const char *wf_chspec_bw_str[] =
 {
 	"5",
 	"10",
 	"20",
 	"40",
 	"80",
 	"160",
 	"80+80",
 	"na"
 };

 static const uint8 wf_chspec_bw_mhz[] =
 {5, 10, 20, 40, 80, 160, 160};

 #define WF_NUM_BW \
 	(sizeof(wf_chspec_bw_mhz)/sizeof(uint8))


 static const uint8 wf_5g_40m_chans[] =
 {38, 46, 54, 62, 102, 110, 118, 126, 134, 142, 151, 159};
 #define WF_NUM_5G_40M_CHANS \
 	(sizeof(wf_5g_40m_chans)/sizeof(uint8))


 static const uint8 wf_5g_80m_chans[] =
 {42, 58, 106, 122, 138, 155};
 #define WF_NUM_5G_80M_CHANS \
 	(sizeof(wf_5g_80m_chans)/sizeof(uint8))


 static const uint8 wf_5g_160m_chans[] =
 {50, 114};
 #define WF_NUM_5G_160M_CHANS \
 	(sizeof(wf_5g_160m_chans)/sizeof(uint8))


 static uint
 bw_chspec_to_mhz(chanspec_t chspec)
 {
 	uint bw;

 	bw = (chspec & WL_CHANSPEC_BW_MASK) >> WL_CHANSPEC_BW_SHIFT;
 	return (bw >= WF_NUM_BW ? 0 : wf_chspec_bw_mhz[bw]);
 }


 static uint8
 center_chan_to_edge(uint bw)
 {

 	return (uint8)(((bw - 20) / 2) / 5);
 }


 static uint8
 channel_low_edge(uint center_ch, uint bw)
 {
 	return (uint8)(center_ch - center_chan_to_edge(bw));
 }


 static int
 channel_to_sb(uint center_ch, uint ctl_ch, uint bw)
 {
 	uint lowest = channel_low_edge(center_ch, bw);
 	uint sb;

 	if ((ctl_ch - lowest) % 4) {

 		return -1;
 	}

 	sb = ((ctl_ch - lowest) / 4);


 	if (sb >= (bw / 20)) {

 		return -1;
 	}

 	return sb;
 }


 static uint8
 channel_to_ctl_chan(uint center_ch, uint bw, uint sb)
 {
 	return (uint8)(channel_low_edge(center_ch, bw) + sb * 4);
 }


 static int
 channel_80mhz_to_id(uint ch)
 {
 	uint i;
 	for (i = 0; i < WF_NUM_5G_80M_CHANS; i ++) {
 		if (ch == wf_5g_80m_chans[i])
 			return i;
 	}

 	return -1;
 }


 char *
 wf_chspec_ntoa(chanspec_t chspec, char *buf)
 {
 	const char *band;
 	uint ctl_chan;

 	if (wf_chspec_malformed(chspec))
 		return NULL;

 	band = "";


 	if ((CHSPEC_IS2G(chspec) && CHSPEC_CHANNEL(chspec) > CH_MAX_2G_CHANNEL) ||
 	    (CHSPEC_IS5G(chspec) && CHSPEC_CHANNEL(chspec) <= CH_MAX_2G_CHANNEL))
 		band = (CHSPEC_IS2G(chspec)) ? "2g" : "5g";


 	ctl_chan = wf_chspec_ctlchan(chspec);


 	if (CHSPEC_IS20(chspec)) {
 		snprintf(buf, CHANSPEC_STR_LEN, "%s%d", band, ctl_chan);
 	} else if (!CHSPEC_IS8080(chspec)) {
 		const char *bw;
 		const char *sb = "";

 		bw = wf_chspec_bw_str[(chspec & WL_CHANSPEC_BW_MASK) >> WL_CHANSPEC_BW_SHIFT];

 #ifdef CHANSPEC_NEW_40MHZ_FORMAT

 		if (CHSPEC_IS40(chspec) && CHSPEC_IS2G(chspec)) {
 			sb = CHSPEC_SB_UPPER(chspec) ? "u" : "l";
 		}

 		snprintf(buf, CHANSPEC_STR_LEN, "%s%d/%s%s", band, ctl_chan, bw, sb);
 #else

 		if (CHSPEC_IS40(chspec)) {
 			sb = CHSPEC_SB_UPPER(chspec) ? "u" : "l";
 			snprintf(buf, CHANSPEC_STR_LEN, "%s%d%s", band, ctl_chan, sb);
 		} else {
 			snprintf(buf, CHANSPEC_STR_LEN, "%s%d/%s", band, ctl_chan, bw);
 		}
 #endif

 	} else {

 		uint chan1 = (chspec & WL_CHANSPEC_CHAN1_MASK) >> WL_CHANSPEC_CHAN1_SHIFT;
 		uint chan2 = (chspec & WL_CHANSPEC_CHAN2_MASK) >> WL_CHANSPEC_CHAN2_SHIFT;


 		chan1 = (chan1 < WF_NUM_5G_80M_CHANS) ? wf_5g_80m_chans[chan1] : 0;
 		chan2 = (chan2 < WF_NUM_5G_80M_CHANS) ? wf_5g_80m_chans[chan2] : 0;


 		snprintf(buf, CHANSPEC_STR_LEN, "%d/80+80/%d-%d", ctl_chan, chan1, chan2);
 	}

 	return (buf);
 }

 static int
 read_uint(const char **p, unsigned int *num)
 {
 	unsigned long val;
 	char *endp = NULL;

 	val = strtoul(*p, &endp, 10);

 	if (endp == *p)
 		return 0;


 	*p = endp;

 	*num = (unsigned int)val;

 	return 1;
 }


 chanspec_t
 wf_chspec_aton(const char *a)
 {
 	chanspec_t chspec;
 	uint chspec_ch, chspec_band, bw, chspec_bw, chspec_sb;
 	uint num, ctl_ch;
 	uint ch1, ch2;
 	char c, sb_ul = '\0';
 	int i;

 	bw = 20;
 	chspec_sb = 0;
 	chspec_ch = ch1 = ch2 = 0;


 	if (!read_uint(&a, &num))
 		return 0;


 	c = tolower(a[0]);
 	if (c == 'g') {
 		a ++;


 		if (num == 2)
 			chspec_band = WL_CHANSPEC_BAND_2G;
 		else if (num == 5)
 			chspec_band = WL_CHANSPEC_BAND_5G;
 		else
 			return 0;


 		if (!read_uint(&a, &ctl_ch))
 			return 0;

 		c = tolower(a[0]);
 	}
 	else {

 		ctl_ch = num;
 		chspec_band = ((ctl_ch <= CH_MAX_2G_CHANNEL) ?
 		               WL_CHANSPEC_BAND_2G : WL_CHANSPEC_BAND_5G);
 	}

 	if (c == '\0') {

 		chspec_bw = WL_CHANSPEC_BW_20;
 		goto done_read;
 	}

 	a ++;


 	if (c == 'u' || c == 'l') {
 		sb_ul = c;
 		chspec_bw = WL_CHANSPEC_BW_40;
 		goto done_read;
 	}


 	if (c != '/')
 		return 0;


 	if (!read_uint(&a, &bw))
 		return 0;


 	if (bw == 20) {
 		chspec_bw = WL_CHANSPEC_BW_20;
 	} else if (bw == 40) {
 		chspec_bw = WL_CHANSPEC_BW_40;
 	} else if (bw == 80) {
 		chspec_bw = WL_CHANSPEC_BW_80;
 	} else if (bw == 160) {
 		chspec_bw = WL_CHANSPEC_BW_160;
 	} else {
 		return 0;
 	}


 	c = tolower(a[0]);


 	if (chspec_band == WL_CHANSPEC_BAND_2G && bw == 40) {
 		if (c == 'u' || c == 'l') {
 			a ++;
 			sb_ul = c;
 			goto done_read;
 		}
 	}


 	if (c == '+') {

 		static const char *plus80 = "80/";


 		chspec_bw = WL_CHANSPEC_BW_8080;

 		a ++;


 		for (i = 0; i < 3; i++) {
 			if (*a++ != *plus80++) {
 				return 0;
 			}
 		}


 		if (!read_uint(&a, &ch1))
 			return 0;


 		if (a[0] != '-')
 			return 0;
 		a ++;


 		if (!read_uint(&a, &ch2))
 			return 0;
 	}

 done_read:

 	while (a[0] == ' ') {
 		a ++;
 	}


 	if (a[0] != '\0')
 		return 0;


 	if (sb_ul != '\0') {
 		if (sb_ul == 'l') {
 			chspec_ch = UPPER_20_SB(ctl_ch);
 			chspec_sb = WL_CHANSPEC_CTL_SB_LLL;
 		} else if (sb_ul == 'u') {
 			chspec_ch = LOWER_20_SB(ctl_ch);
 			chspec_sb = WL_CHANSPEC_CTL_SB_LLU;
 		}
 	}

 	else if (chspec_bw == WL_CHANSPEC_BW_20) {
 		chspec_ch = ctl_ch;
 		chspec_sb = 0;
 	}

 	else if (chspec_bw != WL_CHANSPEC_BW_8080) {

 		const uint8 *center_ch = NULL;
 		int num_ch = 0;
 		int sb = -1;

 		if (chspec_bw == WL_CHANSPEC_BW_40) {
 			center_ch = wf_5g_40m_chans;
 			num_ch = WF_NUM_5G_40M_CHANS;
 		} else if (chspec_bw == WL_CHANSPEC_BW_80) {
 			center_ch = wf_5g_80m_chans;
 			num_ch = WF_NUM_5G_80M_CHANS;
 		} else if (chspec_bw == WL_CHANSPEC_BW_160) {
 			center_ch = wf_5g_160m_chans;
 			num_ch = WF_NUM_5G_160M_CHANS;
 		} else {
 			return 0;
 		}

 		for (i = 0; i < num_ch; i ++) {
 			sb = channel_to_sb(center_ch[i], ctl_ch, bw);
 			if (sb >= 0) {
 				chspec_ch = center_ch[i];
 				chspec_sb = sb << WL_CHANSPEC_CTL_SB_SHIFT;
 				break;
 			}
 		}


 		if (sb < 0) {
 			return 0;
 		}
 	}

 	else {
 		int ch1_id = 0, ch2_id = 0;
 		int sb;

 		ch1_id = channel_80mhz_to_id(ch1);
 		ch2_id = channel_80mhz_to_id(ch2);


 		if (ch1 >= ch2 || ch1_id < 0 || ch2_id < 0)
 			return 0;


 		chspec_ch = (((uint16)ch1_id << WL_CHANSPEC_CHAN1_SHIFT) |
 			((uint16)ch2_id << WL_CHANSPEC_CHAN2_SHIFT));


 		sb = channel_to_sb(ch1, ctl_ch, bw);
 		if (sb < 0) {

 			sb = channel_to_sb(ch2, ctl_ch, bw);
 			if (sb < 0) {

 				return 0;
 			}

 			sb += 4;
 		}

 		chspec_sb = sb << WL_CHANSPEC_CTL_SB_SHIFT;
 	}

 	chspec = (chspec_ch | chspec_band | chspec_bw | chspec_sb);

 	if (wf_chspec_malformed(chspec))
 		return 0;

 	return chspec;
 }


 bool
 wf_chspec_malformed(chanspec_t chanspec)
 {
 	uint chspec_bw = CHSPEC_BW(chanspec);
 	uint chspec_ch = CHSPEC_CHANNEL(chanspec);


 	if (CHSPEC_IS2G(chanspec)) {

 		if (chspec_bw != WL_CHANSPEC_BW_20 &&
 		    chspec_bw != WL_CHANSPEC_BW_40) {
 			return TRUE;
 		}
 	} else if (CHSPEC_IS5G(chanspec)) {
 		if (chspec_bw == WL_CHANSPEC_BW_8080) {
 			uint ch1_id, ch2_id;


 			ch1_id = CHSPEC_CHAN1(chanspec);
 			ch2_id = CHSPEC_CHAN2(chanspec);
 			if (ch1_id >= WF_NUM_5G_80M_CHANS || ch2_id >= WF_NUM_5G_80M_CHANS)
 				return TRUE;


 			if (ch2_id <= ch1_id)
 				return TRUE;
 		} else if (chspec_bw == WL_CHANSPEC_BW_20 || chspec_bw == WL_CHANSPEC_BW_40 ||
 		           chspec_bw == WL_CHANSPEC_BW_80 || chspec_bw == WL_CHANSPEC_BW_160) {

 			if (chspec_ch > MAXCHANNEL) {
 				return TRUE;
 			}
 		} else {

 			return TRUE;
 		}
 	} else {

 		return TRUE;
 	}


 	if (chspec_bw == WL_CHANSPEC_BW_20) {
 		if (CHSPEC_CTL_SB(chanspec) != WL_CHANSPEC_CTL_SB_LLL)
 			return TRUE;
 	} else if (chspec_bw == WL_CHANSPEC_BW_40) {
 		if (CHSPEC_CTL_SB(chanspec) > WL_CHANSPEC_CTL_SB_LLU)
 			return TRUE;
 	} else if (chspec_bw == WL_CHANSPEC_BW_80) {
 		if (CHSPEC_CTL_SB(chanspec) > WL_CHANSPEC_CTL_SB_LUU)
 			return TRUE;
 	}

 	return FALSE;
 }


 bool
 wf_chspec_valid(chanspec_t chanspec)
 {
 	uint chspec_bw = CHSPEC_BW(chanspec);
 	uint chspec_ch = CHSPEC_CHANNEL(chanspec);

 	if (wf_chspec_malformed(chanspec))
 		return FALSE;

 	if (CHSPEC_IS2G(chanspec)) {

 		if (chspec_bw == WL_CHANSPEC_BW_20) {
 			if (chspec_ch >= 1 && chspec_ch <= 14)
 				return TRUE;
 		} else if (chspec_bw == WL_CHANSPEC_BW_40) {
 			if (chspec_ch >= 3 && chspec_ch <= 11)
 				return TRUE;
 		}
 	} else if (CHSPEC_IS5G(chanspec)) {
 		if (chspec_bw == WL_CHANSPEC_BW_8080) {
 			uint16 ch1, ch2;

 			ch1 = wf_5g_80m_chans[CHSPEC_CHAN1(chanspec)];
 			ch2 = wf_5g_80m_chans[CHSPEC_CHAN2(chanspec)];


 			if (ch2 > ch1 + CH_80MHZ_APART)
 				return TRUE;
 		} else {
 			const uint8 *center_ch;
 			uint num_ch, i;

 			if (chspec_bw == WL_CHANSPEC_BW_20 || chspec_bw == WL_CHANSPEC_BW_40) {
 				center_ch = wf_5g_40m_chans;
 				num_ch = WF_NUM_5G_40M_CHANS;
 			} else if (chspec_bw == WL_CHANSPEC_BW_80) {
 				center_ch = wf_5g_80m_chans;
 				num_ch = WF_NUM_5G_80M_CHANS;
 			} else if (chspec_bw == WL_CHANSPEC_BW_160) {
 				center_ch = wf_5g_160m_chans;
 				num_ch = WF_NUM_5G_160M_CHANS;
 			} else {

 				return FALSE;
 			}


 			if (chspec_bw == WL_CHANSPEC_BW_20) {

 				for (i = 0; i < num_ch; i ++) {
 					if (chspec_ch == (uint)LOWER_20_SB(center_ch[i]) ||
 					    chspec_ch == (uint)UPPER_20_SB(center_ch[i]))
 						break;
 				}

 				if (i == num_ch) {

 					if (chspec_ch == 34 || chspec_ch == 38 ||
 					    chspec_ch == 42 || chspec_ch == 46)
 						i = 0;
 				}
 			} else {

 				for (i = 0; i < num_ch; i ++) {
 					if (chspec_ch == center_ch[i])
 						break;
 				}
 			}

 			if (i < num_ch) {

 				return TRUE;
 			}
 		}
 	}

 	return FALSE;
 }


 uint8
 wf_chspec_ctlchan(chanspec_t chspec)
 {
 	uint center_chan;
 	uint bw_mhz;
 	uint sb;

 	ASSERT(!wf_chspec_malformed(chspec));


 	if (CHSPEC_IS20(chspec)) {
 		return CHSPEC_CHANNEL(chspec);
 	} else {
 		sb = CHSPEC_CTL_SB(chspec) >> WL_CHANSPEC_CTL_SB_SHIFT;

 		if (CHSPEC_IS8080(chspec)) {
 			bw_mhz = 80;

 			if (sb < 4) {
 				center_chan = CHSPEC_CHAN1(chspec);
 			}
 			else {
 				center_chan = CHSPEC_CHAN2(chspec);
 				sb -= 4;
 			}


 			center_chan = wf_5g_80m_chans[center_chan];
 		}
 		else {
 			bw_mhz = bw_chspec_to_mhz(chspec);
 			center_chan = CHSPEC_CHANNEL(chspec) >> WL_CHANSPEC_CHAN_SHIFT;
 		}

 		return (channel_to_ctl_chan(center_chan, bw_mhz, sb));
 	}
 }


 chanspec_t
 wf_chspec_ctlchspec(chanspec_t chspec)
 {
 	chanspec_t ctl_chspec = chspec;
 	uint8 ctl_chan;

 	ASSERT(!wf_chspec_malformed(chspec));


 	if (!CHSPEC_IS20(chspec)) {
 		ctl_chan = wf_chspec_ctlchan(chspec);
 		ctl_chspec = ctl_chan | WL_CHANSPEC_BW_20;
 		ctl_chspec |= CHSPEC_BAND(chspec);
 	}
 	return ctl_chspec;
 }

 #endif


 extern chanspec_t wf_chspec_primary40_chspec(chanspec_t chspec)
 {
 	chanspec_t chspec40 = chspec;
 	uint center_chan;
 	uint sb;

 	ASSERT(!wf_chspec_malformed(chspec));

 	if (CHSPEC_IS80(chspec)) {
 		center_chan = CHSPEC_CHANNEL(chspec);
 		sb = CHSPEC_CTL_SB(chspec);

 		if (sb == WL_CHANSPEC_CTL_SB_UL) {

 			sb = WL_CHANSPEC_CTL_SB_L;
 			center_chan += CH_20MHZ_APART;
 		} else if (sb == WL_CHANSPEC_CTL_SB_UU) {

 			sb = WL_CHANSPEC_CTL_SB_U;
 			center_chan += CH_20MHZ_APART;
 		} else {


 			center_chan -= CH_20MHZ_APART;
 		}


 		chspec40 = (WL_CHANSPEC_BAND_5G | WL_CHANSPEC_BW_40 |
 		            sb | center_chan);
 	}

 	return chspec40;
 }


 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;
 	else if ((start_factor == WF_CHAN_FACTOR_2_4_G) && (ch == 14))
 		freq = 2484;
 	else
 		freq = ch * 5 + start_factor / 2;

 	return freq;
 }
	/*
	* 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) 1999-2012, 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_channels.c 309193 2012-01-19 00:03:57Z $
	*/

	#include <bcm_cfg.h>
	#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>
	#ifndef ASSERT
	#define ASSERT(exp)
	#endif
	#endif

	#ifdef _bcmwifi_c_

	#include <bcmwifi.h>
	#else
	#include <bcmwifi_channels.h>
	#endif

	#if defined(WIN32) && (defined(BCMDLL) \|\| defined(WLMDLL))
	#include <bcmstdlib.h>
	#endif

	#ifndef D11AC_IOTYPES







	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(const 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);
	}


	bool
	wf_chspec_malformed(chanspec_t chanspec)
	{

	if (!CHSPEC_IS5G(chanspec) && !CHSPEC_IS2G(chanspec))
	return TRUE;

	if (!CHSPEC_IS40(chanspec) && !CHSPEC_IS20(chanspec))
	return TRUE;


	if (CHSPEC_IS20(chanspec)) {
	if (!CHSPEC_SB_NONE(chanspec))
	return TRUE;
	} else {
	if (!CHSPEC_SB_UPPER(chanspec) && !CHSPEC_SB_LOWER(chanspec))
	return TRUE;
	}

	return FALSE;
	}


	uint8
	wf_chspec_ctlchan(chanspec_t chspec)
	{
	uint8 ctl_chan;


	if (CHSPEC_CTL_SB(chspec) == WL_CHANSPEC_CTL_SB_NONE) {
	return CHSPEC_CHANNEL(chspec);
	} else {

	ASSERT(CHSPEC_BW(chspec) == WL_CHANSPEC_BW_40);

	if (CHSPEC_CTL_SB(chspec) == WL_CHANSPEC_CTL_SB_UPPER) {

	ctl_chan = UPPER_20_SB(CHSPEC_CHANNEL(chspec));
	} else {
	ASSERT(CHSPEC_CTL_SB(chspec) == WL_CHANSPEC_CTL_SB_LOWER);

	ctl_chan = LOWER_20_SB(CHSPEC_CHANNEL(chspec));
	}
	}

	return ctl_chan;
	}

	chanspec_t
	wf_chspec_ctlchspec(chanspec_t chspec)
	{
	chanspec_t ctl_chspec = 0;
	uint8 channel;

	ASSERT(!wf_chspec_malformed(chspec));


	if (CHSPEC_CTL_SB(chspec) == WL_CHANSPEC_CTL_SB_NONE) {
	return chspec;
	} else {
	if (CHSPEC_CTL_SB(chspec) == WL_CHANSPEC_CTL_SB_UPPER) {
	channel = UPPER_20_SB(CHSPEC_CHANNEL(chspec));
	} else {
	channel = LOWER_20_SB(CHSPEC_CHANNEL(chspec));
	}
	ctl_chspec = channel \| WL_CHANSPEC_BW_20 \| WL_CHANSPEC_CTL_SB_NONE;
	ctl_chspec \|= CHSPEC_BAND(chspec);
	}
	return ctl_chspec;
	}

	#else






	static const char *wf_chspec_bw_str[] =
	{
	"5",
	"10",
	"20",
	"40",
	"80",
	"160",
	"80+80",
	"na"
	};

	static const uint8 wf_chspec_bw_mhz[] =
	{5, 10, 20, 40, 80, 160, 160};

	#define WF_NUM_BW \
	(sizeof(wf_chspec_bw_mhz)/sizeof(uint8))


	static const uint8 wf_5g_40m_chans[] =
	{38, 46, 54, 62, 102, 110, 118, 126, 134, 142, 151, 159};
	#define WF_NUM_5G_40M_CHANS \
	(sizeof(wf_5g_40m_chans)/sizeof(uint8))


	static const uint8 wf_5g_80m_chans[] =
	{42, 58, 106, 122, 138, 155};
	#define WF_NUM_5G_80M_CHANS \
	(sizeof(wf_5g_80m_chans)/sizeof(uint8))


	static const uint8 wf_5g_160m_chans[] =
	{50, 114};
	#define WF_NUM_5G_160M_CHANS \
	(sizeof(wf_5g_160m_chans)/sizeof(uint8))



	static uint
	bw_chspec_to_mhz(chanspec_t chspec)
	{
	uint bw;

	bw = (chspec & WL_CHANSPEC_BW_MASK) >> WL_CHANSPEC_BW_SHIFT;
	return (bw >= WF_NUM_BW ? 0 : wf_chspec_bw_mhz[bw]);
	}


	static uint8
	center_chan_to_edge(uint bw)
	{

	return (uint8)(((bw - 20) / 2) / 5);
	}


	static uint8
	channel_low_edge(uint center_ch, uint bw)
	{
	return (uint8)(center_ch - center_chan_to_edge(bw));
	}


	static int
	channel_to_sb(uint center_ch, uint ctl_ch, uint bw)
	{
	uint lowest = channel_low_edge(center_ch, bw);
	uint sb;

	if ((ctl_ch - lowest) % 4) {

	return -1;
	}

	sb = ((ctl_ch - lowest) / 4);


	if (sb >= (bw / 20)) {

	return -1;
	}

	return sb;
	}


	static uint8
	channel_to_ctl_chan(uint center_ch, uint bw, uint sb)
	{
	return (uint8)(channel_low_edge(center_ch, bw) + sb * 4);
	}


	static int
	channel_80mhz_to_id(uint ch)
	{
	uint i;
	for (i = 0; i < WF_NUM_5G_80M_CHANS; i ++) {
	if (ch == wf_5g_80m_chans[i])
	return i;
	}

	return -1;
	}


	char *
	wf_chspec_ntoa(chanspec_t chspec, char *buf)
	{
	const char *band;
	uint ctl_chan;

	if (wf_chspec_malformed(chspec))
	return NULL;

	band = "";


	if ((CHSPEC_IS2G(chspec) && CHSPEC_CHANNEL(chspec) > CH_MAX_2G_CHANNEL) \|\|
	(CHSPEC_IS5G(chspec) && CHSPEC_CHANNEL(chspec) <= CH_MAX_2G_CHANNEL))
	band = (CHSPEC_IS2G(chspec)) ? "2g" : "5g";


	ctl_chan = wf_chspec_ctlchan(chspec);


	if (CHSPEC_IS20(chspec)) {
	snprintf(buf, CHANSPEC_STR_LEN, "%s%d", band, ctl_chan);
	} else if (!CHSPEC_IS8080(chspec)) {
	const char *bw;
	const char *sb = "";

	bw = wf_chspec_bw_str[(chspec & WL_CHANSPEC_BW_MASK) >> WL_CHANSPEC_BW_SHIFT];

	#ifdef CHANSPEC_NEW_40MHZ_FORMAT

	if (CHSPEC_IS40(chspec) && CHSPEC_IS2G(chspec)) {
	sb = CHSPEC_SB_UPPER(chspec) ? "u" : "l";
	}

	snprintf(buf, CHANSPEC_STR_LEN, "%s%d/%s%s", band, ctl_chan, bw, sb);
	#else

	if (CHSPEC_IS40(chspec)) {
	sb = CHSPEC_SB_UPPER(chspec) ? "u" : "l";
	snprintf(buf, CHANSPEC_STR_LEN, "%s%d%s", band, ctl_chan, sb);
	} else {
	snprintf(buf, CHANSPEC_STR_LEN, "%s%d/%s", band, ctl_chan, bw);
	}
	#endif

	} else {

	uint chan1 = (chspec & WL_CHANSPEC_CHAN1_MASK) >> WL_CHANSPEC_CHAN1_SHIFT;
	uint chan2 = (chspec & WL_CHANSPEC_CHAN2_MASK) >> WL_CHANSPEC_CHAN2_SHIFT;


	chan1 = (chan1 < WF_NUM_5G_80M_CHANS) ? wf_5g_80m_chans[chan1] : 0;
	chan2 = (chan2 < WF_NUM_5G_80M_CHANS) ? wf_5g_80m_chans[chan2] : 0;


	snprintf(buf, CHANSPEC_STR_LEN, "%d/80+80/%d-%d", ctl_chan, chan1, chan2);
	}

	return (buf);
	}

	static int
	read_uint(const char *p, unsigned int num)
	{
	unsigned long val;
	char *endp = NULL;

	val = strtoul(*p, &endp, 10);

	if (endp == *p)
	return 0;


	*p = endp;

	*num = (unsigned int)val;

	return 1;
	}


	chanspec_t
	wf_chspec_aton(const char *a)
	{
	chanspec_t chspec;
	uint chspec_ch, chspec_band, bw, chspec_bw, chspec_sb;
	uint num, ctl_ch;
	uint ch1, ch2;
	char c, sb_ul = '\0';
	int i;

	bw = 20;
	chspec_sb = 0;
	chspec_ch = ch1 = ch2 = 0;


	if (!read_uint(&a, &num))
	return 0;


	c = tolower(a[0]);
	if (c == 'g') {
	a ++;


	if (num == 2)
	chspec_band = WL_CHANSPEC_BAND_2G;
	else if (num == 5)
	chspec_band = WL_CHANSPEC_BAND_5G;
	else
	return 0;


	if (!read_uint(&a, &ctl_ch))
	return 0;

	c = tolower(a[0]);
	}
	else {

	ctl_ch = num;
	chspec_band = ((ctl_ch <= CH_MAX_2G_CHANNEL) ?
	WL_CHANSPEC_BAND_2G : WL_CHANSPEC_BAND_5G);
	}

	if (c == '\0') {

	chspec_bw = WL_CHANSPEC_BW_20;
	goto done_read;
	}

	a ++;


	if (c == 'u' \|\| c == 'l') {
	sb_ul = c;
	chspec_bw = WL_CHANSPEC_BW_40;
	goto done_read;
	}


	if (c != '/')
	return 0;


	if (!read_uint(&a, &bw))
	return 0;


	if (bw == 20) {
	chspec_bw = WL_CHANSPEC_BW_20;
	} else if (bw == 40) {
	chspec_bw = WL_CHANSPEC_BW_40;
	} else if (bw == 80) {
	chspec_bw = WL_CHANSPEC_BW_80;
	} else if (bw == 160) {
	chspec_bw = WL_CHANSPEC_BW_160;
	} else {
	return 0;
	}



	c = tolower(a[0]);


	if (chspec_band == WL_CHANSPEC_BAND_2G && bw == 40) {
	if (c == 'u' \|\| c == 'l') {
	a ++;
	sb_ul = c;
	goto done_read;
	}
	}


	if (c == '+') {

	static const char *plus80 = "80/";


	chspec_bw = WL_CHANSPEC_BW_8080;

	a ++;


	for (i = 0; i < 3; i++) {
	if (a++ != plus80++) {
	return 0;
	}
	}


	if (!read_uint(&a, &ch1))
	return 0;


	if (a[0] != '-')
	return 0;
	a ++;


	if (!read_uint(&a, &ch2))
	return 0;
	}

	done_read:

	while (a[0] == ' ') {
	a ++;
	}


	if (a[0] != '\0')
	return 0;




	if (sb_ul != '\0') {
	if (sb_ul == 'l') {
	chspec_ch = UPPER_20_SB(ctl_ch);
	chspec_sb = WL_CHANSPEC_CTL_SB_LLL;
	} else if (sb_ul == 'u') {
	chspec_ch = LOWER_20_SB(ctl_ch);
	chspec_sb = WL_CHANSPEC_CTL_SB_LLU;
	}
	}

	else if (chspec_bw == WL_CHANSPEC_BW_20) {
	chspec_ch = ctl_ch;
	chspec_sb = 0;
	}

	else if (chspec_bw != WL_CHANSPEC_BW_8080) {

	const uint8 *center_ch = NULL;
	int num_ch = 0;
	int sb = -1;

	if (chspec_bw == WL_CHANSPEC_BW_40) {
	center_ch = wf_5g_40m_chans;
	num_ch = WF_NUM_5G_40M_CHANS;
	} else if (chspec_bw == WL_CHANSPEC_BW_80) {
	center_ch = wf_5g_80m_chans;
	num_ch = WF_NUM_5G_80M_CHANS;
	} else if (chspec_bw == WL_CHANSPEC_BW_160) {
	center_ch = wf_5g_160m_chans;
	num_ch = WF_NUM_5G_160M_CHANS;
	} else {
	return 0;
	}

	for (i = 0; i < num_ch; i ++) {
	sb = channel_to_sb(center_ch[i], ctl_ch, bw);
	if (sb >= 0) {
	chspec_ch = center_ch[i];
	chspec_sb = sb << WL_CHANSPEC_CTL_SB_SHIFT;
	break;
	}
	}


	if (sb < 0) {
	return 0;
	}
	}

	else {
	int ch1_id = 0, ch2_id = 0;
	int sb;

	ch1_id = channel_80mhz_to_id(ch1);
	ch2_id = channel_80mhz_to_id(ch2);


	if (ch1 >= ch2 \|\| ch1_id < 0 \|\| ch2_id < 0)
	return 0;


	chspec_ch = (((uint16)ch1_id << WL_CHANSPEC_CHAN1_SHIFT) \|
	((uint16)ch2_id << WL_CHANSPEC_CHAN2_SHIFT));




	sb = channel_to_sb(ch1, ctl_ch, bw);
	if (sb < 0) {

	sb = channel_to_sb(ch2, ctl_ch, bw);
	if (sb < 0) {

	return 0;
	}

	sb += 4;
	}

	chspec_sb = sb << WL_CHANSPEC_CTL_SB_SHIFT;
	}

	chspec = (chspec_ch \| chspec_band \| chspec_bw \| chspec_sb);

	if (wf_chspec_malformed(chspec))
	return 0;

	return chspec;
	}


	bool
	wf_chspec_malformed(chanspec_t chanspec)
	{
	uint chspec_bw = CHSPEC_BW(chanspec);
	uint chspec_ch = CHSPEC_CHANNEL(chanspec);


	if (CHSPEC_IS2G(chanspec)) {

	if (chspec_bw != WL_CHANSPEC_BW_20 &&
	chspec_bw != WL_CHANSPEC_BW_40) {
	return TRUE;
	}
	} else if (CHSPEC_IS5G(chanspec)) {
	if (chspec_bw == WL_CHANSPEC_BW_8080) {
	uint ch1_id, ch2_id;


	ch1_id = CHSPEC_CHAN1(chanspec);
	ch2_id = CHSPEC_CHAN2(chanspec);
	if (ch1_id >= WF_NUM_5G_80M_CHANS \|\| ch2_id >= WF_NUM_5G_80M_CHANS)
	return TRUE;


	if (ch2_id <= ch1_id)
	return TRUE;
	} else if (chspec_bw == WL_CHANSPEC_BW_20 \|\| chspec_bw == WL_CHANSPEC_BW_40 \|\|
	chspec_bw == WL_CHANSPEC_BW_80 \|\| chspec_bw == WL_CHANSPEC_BW_160) {

	if (chspec_ch > MAXCHANNEL) {
	return TRUE;
	}
	} else {

	return TRUE;
	}
	} else {

	return TRUE;
	}


	if (chspec_bw == WL_CHANSPEC_BW_20) {
	if (CHSPEC_CTL_SB(chanspec) != WL_CHANSPEC_CTL_SB_LLL)
	return TRUE;
	} else if (chspec_bw == WL_CHANSPEC_BW_40) {
	if (CHSPEC_CTL_SB(chanspec) > WL_CHANSPEC_CTL_SB_LLU)
	return TRUE;
	} else if (chspec_bw == WL_CHANSPEC_BW_80) {
	if (CHSPEC_CTL_SB(chanspec) > WL_CHANSPEC_CTL_SB_LUU)
	return TRUE;
	}

	return FALSE;
	}


	bool
	wf_chspec_valid(chanspec_t chanspec)
	{
	uint chspec_bw = CHSPEC_BW(chanspec);
	uint chspec_ch = CHSPEC_CHANNEL(chanspec);

	if (wf_chspec_malformed(chanspec))
	return FALSE;

	if (CHSPEC_IS2G(chanspec)) {

	if (chspec_bw == WL_CHANSPEC_BW_20) {
	if (chspec_ch >= 1 && chspec_ch <= 14)
	return TRUE;
	} else if (chspec_bw == WL_CHANSPEC_BW_40) {
	if (chspec_ch >= 3 && chspec_ch <= 11)
	return TRUE;
	}
	} else if (CHSPEC_IS5G(chanspec)) {
	if (chspec_bw == WL_CHANSPEC_BW_8080) {
	uint16 ch1, ch2;

	ch1 = wf_5g_80m_chans[CHSPEC_CHAN1(chanspec)];
	ch2 = wf_5g_80m_chans[CHSPEC_CHAN2(chanspec)];


	if (ch2 > ch1 + CH_80MHZ_APART)
	return TRUE;
	} else {
	const uint8 *center_ch;
	uint num_ch, i;

	if (chspec_bw == WL_CHANSPEC_BW_20 \|\| chspec_bw == WL_CHANSPEC_BW_40) {
	center_ch = wf_5g_40m_chans;
	num_ch = WF_NUM_5G_40M_CHANS;
	} else if (chspec_bw == WL_CHANSPEC_BW_80) {
	center_ch = wf_5g_80m_chans;
	num_ch = WF_NUM_5G_80M_CHANS;
	} else if (chspec_bw == WL_CHANSPEC_BW_160) {
	center_ch = wf_5g_160m_chans;
	num_ch = WF_NUM_5G_160M_CHANS;
	} else {

	return FALSE;
	}


	if (chspec_bw == WL_CHANSPEC_BW_20) {

	for (i = 0; i < num_ch; i ++) {
	if (chspec_ch == (uint)LOWER_20_SB(center_ch[i]) \|\|
	chspec_ch == (uint)UPPER_20_SB(center_ch[i]))
	break;
	}

	if (i == num_ch) {

	if (chspec_ch == 34 \|\| chspec_ch == 38 \|\|
	chspec_ch == 42 \|\| chspec_ch == 46)
	i = 0;
	}
	} else {

	for (i = 0; i < num_ch; i ++) {
	if (chspec_ch == center_ch[i])
	break;
	}
	}

	if (i < num_ch) {

	return TRUE;
	}
	}
	}

	return FALSE;
	}


	uint8
	wf_chspec_ctlchan(chanspec_t chspec)
	{
	uint center_chan;
	uint bw_mhz;
	uint sb;

	ASSERT(!wf_chspec_malformed(chspec));


	if (CHSPEC_IS20(chspec)) {
	return CHSPEC_CHANNEL(chspec);
	} else {
	sb = CHSPEC_CTL_SB(chspec) >> WL_CHANSPEC_CTL_SB_SHIFT;

	if (CHSPEC_IS8080(chspec)) {
	bw_mhz = 80;

	if (sb < 4) {
	center_chan = CHSPEC_CHAN1(chspec);
	}
	else {
	center_chan = CHSPEC_CHAN2(chspec);
	sb -= 4;
	}


	center_chan = wf_5g_80m_chans[center_chan];
	}
	else {
	bw_mhz = bw_chspec_to_mhz(chspec);
	center_chan = CHSPEC_CHANNEL(chspec) >> WL_CHANSPEC_CHAN_SHIFT;
	}

	return (channel_to_ctl_chan(center_chan, bw_mhz, sb));
	}
	}


	chanspec_t
	wf_chspec_ctlchspec(chanspec_t chspec)
	{
	chanspec_t ctl_chspec = chspec;
	uint8 ctl_chan;

	ASSERT(!wf_chspec_malformed(chspec));


	if (!CHSPEC_IS20(chspec)) {
	ctl_chan = wf_chspec_ctlchan(chspec);
	ctl_chspec = ctl_chan \| WL_CHANSPEC_BW_20;
	ctl_chspec \|= CHSPEC_BAND(chspec);
	}
	return ctl_chspec;
	}

	#endif


	extern chanspec_t wf_chspec_primary40_chspec(chanspec_t chspec)
	{
	chanspec_t chspec40 = chspec;
	uint center_chan;
	uint sb;

	ASSERT(!wf_chspec_malformed(chspec));

	if (CHSPEC_IS80(chspec)) {
	center_chan = CHSPEC_CHANNEL(chspec);
	sb = CHSPEC_CTL_SB(chspec);

	if (sb == WL_CHANSPEC_CTL_SB_UL) {

	sb = WL_CHANSPEC_CTL_SB_L;
	center_chan += CH_20MHZ_APART;
	} else if (sb == WL_CHANSPEC_CTL_SB_UU) {

	sb = WL_CHANSPEC_CTL_SB_U;
	center_chan += CH_20MHZ_APART;
	} else {


	center_chan -= CH_20MHZ_APART;
	}


	chspec40 = (WL_CHANSPEC_BAND_5G \| WL_CHANSPEC_BW_40 \|
	sb \| center_chan);
	}

	return chspec40;
	}


	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;
	else if ((start_factor == WF_CHAN_FACTOR_2_4_G) && (ch == 14))
	freq = 2484;
	else
	freq = ch * 5 + start_factor / 2;

	return freq;
	}