xref: /hardware/broadcom/wlan/bcmdhd/dhdutil/include/bcmwifi_channels.h

/*
 * Misc utility routines for WL and Apps
 * This header file housing the define and function prototype use by
 * both the wl driver, tools & Apps.
 *
 * Copyright (C) 1999-2013, Broadcom Corporation
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 *
 * $Id: bcmwifi_channels.h 309193 2012-01-19 00:03:57Z $
 */

#ifndef	_bcmwifi_channels_h_
#define	_bcmwifi_channels_h_


/* A chanspec holds the channel number, band, bandwidth and control sideband */
typedef uint16 chanspec_t;

/* channel defines */
#define CH_UPPER_SB			0x01
#define CH_LOWER_SB			0x02
#define CH_EWA_VALID			0x04
#define CH_80MHZ_APART			16
#define CH_40MHZ_APART			8
#define CH_20MHZ_APART			4
#define CH_10MHZ_APART			2
#define CH_5MHZ_APART			1	/* 2G band channels are 5 Mhz apart */
#define CH_MAX_2G_CHANNEL		14	/* Max channel in 2G band */
#define	MAXCHANNEL		224	/* max # supported channels. The max channel no is 216,
					 * this is that + 1 rounded up to a multiple of NBBY (8).
					 * DO NOT MAKE it > 255: channels are uint8's all over
					 */
#define CHSPEC_CTLOVLP(sp1, sp2, sep)	(ABS(wf_chspec_ctlchan(sp1) - wf_chspec_ctlchan(sp2)) < \
				  (sep))

/* All builds use the new 11ac ratespec/chanspec */
#undef  D11AC_IOTYPES
#define D11AC_IOTYPES

#ifndef D11AC_IOTYPES

#define WL_CHANSPEC_CHAN_MASK		0x00ff
#define WL_CHANSPEC_CHAN_SHIFT		0

#define WL_CHANSPEC_CTL_SB_MASK		0x0300
#define WL_CHANSPEC_CTL_SB_SHIFT	     8
#define WL_CHANSPEC_CTL_SB_LOWER	0x0100
#define WL_CHANSPEC_CTL_SB_UPPER	0x0200
#define WL_CHANSPEC_CTL_SB_NONE		0x0300

#define WL_CHANSPEC_BW_MASK		0x0C00
#define WL_CHANSPEC_BW_SHIFT		    10
#define WL_CHANSPEC_BW_10		0x0400
#define WL_CHANSPEC_BW_20		0x0800
#define WL_CHANSPEC_BW_40		0x0C00

#define WL_CHANSPEC_BAND_MASK		0xf000
#define WL_CHANSPEC_BAND_SHIFT		12
#ifdef WL_CHANSPEC_BAND_5G
#undef WL_CHANSPEC_BAND_5G
#endif
#ifdef WL_CHANSPEC_BAND_2G
#undef WL_CHANSPEC_BAND_2G
#endif
#define WL_CHANSPEC_BAND_5G		0x1000
#define WL_CHANSPEC_BAND_2G		0x2000
#define INVCHANSPEC			255

/* channel defines */
#define LOWER_20_SB(channel)	(((channel) > CH_10MHZ_APART) ? ((channel) - CH_10MHZ_APART) : 0)
#define UPPER_20_SB(channel)	(((channel) < (MAXCHANNEL - CH_10MHZ_APART)) ? \
				((channel) + CH_10MHZ_APART) : 0)

#define LL_20_SB(channel) (((channel) > 3 * CH_10MHZ_APART) ? ((channel) - 3 * CH_10MHZ_APART) : 0)
#define UU_20_SB(channel) 	(((channel) < (MAXCHANNEL - 3 * CH_10MHZ_APART)) ? \
				((channel) + 3 * CH_10MHZ_APART) : 0)
#define LU_20_SB(channel) LOWER_20_SB(channel)
#define UL_20_SB(channel) UPPER_20_SB(channel)

#define CHSPEC_WLCBANDUNIT(chspec)	(CHSPEC_IS5G(chspec) ? BAND_5G_INDEX : BAND_2G_INDEX)
#define CH20MHZ_CHSPEC(channel)	(chanspec_t)((chanspec_t)(channel) | WL_CHANSPEC_BW_20 | \
				WL_CHANSPEC_CTL_SB_NONE | (((channel) <= CH_MAX_2G_CHANNEL) ? \
				WL_CHANSPEC_BAND_2G : WL_CHANSPEC_BAND_5G))
#define NEXT_20MHZ_CHAN(channel)	(((channel) < (MAXCHANNEL - CH_20MHZ_APART)) ? \
					((channel) + CH_20MHZ_APART) : 0)
#define CH40MHZ_CHSPEC(channel, ctlsb)	(chanspec_t) \
					((channel) | (ctlsb) | WL_CHANSPEC_BW_40 | \
					((channel) <= CH_MAX_2G_CHANNEL ? WL_CHANSPEC_BAND_2G : \
					WL_CHANSPEC_BAND_5G))
#define CHSPEC_CHANNEL(chspec)	((uint8)((chspec) & WL_CHANSPEC_CHAN_MASK))
#define CHSPEC_BAND(chspec)	((chspec) & WL_CHANSPEC_BAND_MASK)

/* chanspec stores radio channel & flags to indicate control channel location, i.e. upper/lower */
#define CHSPEC_CTL_SB(chspec)	((chspec) & WL_CHANSPEC_CTL_SB_MASK)
#define CHSPEC_BW(chspec)	((chspec) & WL_CHANSPEC_BW_MASK)

#ifdef WL11N_20MHZONLY

#define CHSPEC_IS10(chspec)	0
#define CHSPEC_IS20(chspec)	1
#ifndef CHSPEC_IS40
#define CHSPEC_IS40(chspec)	0
#endif

#else /* !WL11N_20MHZONLY */

#define CHSPEC_IS10(chspec)	(((chspec) & WL_CHANSPEC_BW_MASK) == WL_CHANSPEC_BW_10)
#define CHSPEC_IS20(chspec)	(((chspec) & WL_CHANSPEC_BW_MASK) == WL_CHANSPEC_BW_20)
#ifndef CHSPEC_IS40
#define CHSPEC_IS40(chspec)	(((chspec) & WL_CHANSPEC_BW_MASK) == WL_CHANSPEC_BW_40)
#endif

#endif /* !WL11N_20MHZONLY */

#define CHSPEC_IS5G(chspec)	(((chspec) & WL_CHANSPEC_BAND_MASK) == WL_CHANSPEC_BAND_5G)
#define CHSPEC_IS2G(chspec)	(((chspec) & WL_CHANSPEC_BAND_MASK) == WL_CHANSPEC_BAND_2G)
#define CHSPEC_SB_NONE(chspec)	(((chspec) & WL_CHANSPEC_CTL_SB_MASK) == WL_CHANSPEC_CTL_SB_NONE)
#define CHSPEC_SB_UPPER(chspec)	(((chspec) & WL_CHANSPEC_CTL_SB_MASK) == WL_CHANSPEC_CTL_SB_UPPER)
#define CHSPEC_SB_LOWER(chspec)	(((chspec) & WL_CHANSPEC_CTL_SB_MASK) == WL_CHANSPEC_CTL_SB_LOWER)
#define CHSPEC_CTL_CHAN(chspec)  ((CHSPEC_SB_LOWER(chspec)) ? \
				  (LOWER_20_SB(((chspec) & WL_CHANSPEC_CHAN_MASK))) : \
				  (UPPER_20_SB(((chspec) & WL_CHANSPEC_CHAN_MASK))))
#define CHSPEC2WLC_BAND(chspec) (CHSPEC_IS5G(chspec) ? WLC_BAND_5G : WLC_BAND_2G)

#define CHANSPEC_STR_LEN    8

#else /* D11AC_IOTYPES */

#define WL_CHANSPEC_CHAN_MASK		0x00ff
#define WL_CHANSPEC_CHAN_SHIFT		0
#define WL_CHANSPEC_CHAN1_MASK		0x000f
#define WL_CHANSPEC_CHAN1_SHIFT		0
#define WL_CHANSPEC_CHAN2_MASK		0x00f0
#define WL_CHANSPEC_CHAN2_SHIFT		4

#define WL_CHANSPEC_CTL_SB_MASK		0x0700
#define WL_CHANSPEC_CTL_SB_SHIFT	8
#define WL_CHANSPEC_CTL_SB_LLL		0x0000
#define WL_CHANSPEC_CTL_SB_LLU		0x0100
#define WL_CHANSPEC_CTL_SB_LUL		0x0200
#define WL_CHANSPEC_CTL_SB_LUU		0x0300
#define WL_CHANSPEC_CTL_SB_ULL		0x0400
#define WL_CHANSPEC_CTL_SB_ULU		0x0500
#define WL_CHANSPEC_CTL_SB_UUL		0x0600
#define WL_CHANSPEC_CTL_SB_UUU		0x0700
#define WL_CHANSPEC_CTL_SB_LL		WL_CHANSPEC_CTL_SB_LLL
#define WL_CHANSPEC_CTL_SB_LU		WL_CHANSPEC_CTL_SB_LLU
#define WL_CHANSPEC_CTL_SB_UL		WL_CHANSPEC_CTL_SB_LUL
#define WL_CHANSPEC_CTL_SB_UU		WL_CHANSPEC_CTL_SB_LUU
#define WL_CHANSPEC_CTL_SB_L		WL_CHANSPEC_CTL_SB_LLL
#define WL_CHANSPEC_CTL_SB_U		WL_CHANSPEC_CTL_SB_LLU
#define WL_CHANSPEC_CTL_SB_LOWER 	WL_CHANSPEC_CTL_SB_LLL
#define WL_CHANSPEC_CTL_SB_UPPER	WL_CHANSPEC_CTL_SB_LLU

#define WL_CHANSPEC_BW_MASK		0x3800
#define WL_CHANSPEC_BW_SHIFT		11
#define WL_CHANSPEC_BW_5		0x0000
#define WL_CHANSPEC_BW_10		0x0800
#define WL_CHANSPEC_BW_20		0x1000
#define WL_CHANSPEC_BW_40		0x1800
#define WL_CHANSPEC_BW_80		0x2000
#define WL_CHANSPEC_BW_160		0x2800
#define WL_CHANSPEC_BW_8080		0x3000

#define WL_CHANSPEC_BAND_MASK		0xc000
#define WL_CHANSPEC_BAND_SHIFT		14
#define WL_CHANSPEC_BAND_2G		0x0000
#define WL_CHANSPEC_BAND_3G		0x4000
#define WL_CHANSPEC_BAND_4G		0x8000
#define WL_CHANSPEC_BAND_5G		0xc000
#define INVCHANSPEC			255

/* channel defines */
#define LOWER_20_SB(channel)		(((channel) > CH_10MHZ_APART) ? \
					((channel) - CH_10MHZ_APART) : 0)
#define UPPER_20_SB(channel)		(((channel) < (MAXCHANNEL - CH_10MHZ_APART)) ? \
					((channel) + CH_10MHZ_APART) : 0)

#define LL_20_SB(channel) (((channel) > 3 * CH_10MHZ_APART) ? ((channel) - 3 * CH_10MHZ_APART) : 0)
#define UU_20_SB(channel) 	(((channel) < (MAXCHANNEL - 3 * CH_10MHZ_APART)) ? \
				((channel) + 3 * CH_10MHZ_APART) : 0)
#define LU_20_SB(channel) LOWER_20_SB(channel)
#define UL_20_SB(channel) UPPER_20_SB(channel)

#define LOWER_40_SB(channel)		((channel) - CH_20MHZ_APART)
#define UPPER_40_SB(channel)		((channel) + CH_20MHZ_APART)
#define CHSPEC_WLCBANDUNIT(chspec)	(CHSPEC_IS5G(chspec) ? BAND_5G_INDEX : BAND_2G_INDEX)
#define CH20MHZ_CHSPEC(channel)		(chanspec_t)((chanspec_t)(channel) | WL_CHANSPEC_BW_20 | \
					(((channel) <= CH_MAX_2G_CHANNEL) ? \
					WL_CHANSPEC_BAND_2G : WL_CHANSPEC_BAND_5G))
#define NEXT_20MHZ_CHAN(channel)	(((channel) < (MAXCHANNEL - CH_20MHZ_APART)) ? \
					((channel) + CH_20MHZ_APART) : 0)
#define CH40MHZ_CHSPEC(channel, ctlsb)	(chanspec_t) \
					((channel) | (ctlsb) | WL_CHANSPEC_BW_40 | \
					((channel) <= CH_MAX_2G_CHANNEL ? WL_CHANSPEC_BAND_2G : \
					WL_CHANSPEC_BAND_5G))
#define CH80MHZ_CHSPEC(channel, ctlsb)	(chanspec_t) \
					((channel) | (ctlsb) | \
					 WL_CHANSPEC_BW_80 | WL_CHANSPEC_BAND_5G)
#define CH160MHZ_CHSPEC(channel, ctlsb)	(chanspec_t) \
					((channel) | (ctlsb) | \
					 WL_CHANSPEC_BW_160 | WL_CHANSPEC_BAND_5G)

/* simple MACROs to get different fields of chanspec */
#define CHSPEC_CHANNEL(chspec)		((uint8)((chspec) & WL_CHANSPEC_CHAN_MASK))
#define CHSPEC_CHAN1(chspec)		((chspec) & WL_CHANSPEC_CHAN1_MASK)
#define CHSPEC_CHAN2(chspec)		((chspec) & WL_CHANSPEC_CHAN2_MASK)
#define CHSPEC_BAND(chspec)		((chspec) & WL_CHANSPEC_BAND_MASK)
#define CHSPEC_CTL_SB(chspec)		((chspec) & WL_CHANSPEC_CTL_SB_MASK)
#define CHSPEC_BW(chspec)		((chspec) & WL_CHANSPEC_BW_MASK)

#ifdef WL11N_20MHZONLY

#define CHSPEC_IS10(chspec)	0
#define CHSPEC_IS20(chspec)	1
#ifndef CHSPEC_IS40
#define CHSPEC_IS40(chspec)	0
#endif
#ifndef CHSPEC_IS80
#define CHSPEC_IS80(chspec)	0
#endif
#ifndef CHSPEC_IS160
#define CHSPEC_IS160(chspec)	0
#endif
#ifndef CHSPEC_IS8080
#define CHSPEC_IS8080(chspec)	0
#endif

#else /* !WL11N_20MHZONLY */

#define CHSPEC_IS10(chspec)	(((chspec) & WL_CHANSPEC_BW_MASK) == WL_CHANSPEC_BW_10)
#define CHSPEC_IS20(chspec)	(((chspec) & WL_CHANSPEC_BW_MASK) == WL_CHANSPEC_BW_20)
#ifndef CHSPEC_IS40
#define CHSPEC_IS40(chspec)	(((chspec) & WL_CHANSPEC_BW_MASK) == WL_CHANSPEC_BW_40)
#endif
#ifndef CHSPEC_IS80
#define CHSPEC_IS80(chspec)	(((chspec) & WL_CHANSPEC_BW_MASK) == WL_CHANSPEC_BW_80)
#endif
#ifndef CHSPEC_IS160
#define CHSPEC_IS160(chspec)	(((chspec) & WL_CHANSPEC_BW_MASK) == WL_CHANSPEC_BW_160)
#endif
#ifndef CHSPEC_IS8080
#define CHSPEC_IS8080(chspec)	(((chspec) & WL_CHANSPEC_BW_MASK) == WL_CHANSPEC_BW_8080)
#endif

#endif /* !WL11N_20MHZONLY */

#define CHSPEC_IS5G(chspec)	(((chspec) & WL_CHANSPEC_BAND_MASK) == WL_CHANSPEC_BAND_5G)
#define CHSPEC_IS2G(chspec)	(((chspec) & WL_CHANSPEC_BAND_MASK) == WL_CHANSPEC_BAND_2G)
#define CHSPEC_SB_UPPER(chspec)	\
	((((chspec) & WL_CHANSPEC_CTL_SB_MASK) == WL_CHANSPEC_CTL_SB_UPPER) && \
	(((chspec) & WL_CHANSPEC_BW_MASK) == WL_CHANSPEC_BW_40))
#define CHSPEC_SB_LOWER(chspec)	\
	((((chspec) & WL_CHANSPEC_CTL_SB_MASK) == WL_CHANSPEC_CTL_SB_LOWER) && \
	(((chspec) & WL_CHANSPEC_BW_MASK) == WL_CHANSPEC_BW_40))
#define CHSPEC2WLC_BAND(chspec) (CHSPEC_IS5G(chspec) ? WLC_BAND_5G : WLC_BAND_2G)

/**
 * Number of chars needed for wf_chspec_ntoa() destination character buffer.
 */
#define CHANSPEC_STR_LEN    20


/* Legacy Chanspec defines
 * These are the defines for the previous format of the chanspec_t
 */
#define WL_LCHANSPEC_CHAN_MASK		0x00ff
#define WL_LCHANSPEC_CHAN_SHIFT		     0

#define WL_LCHANSPEC_CTL_SB_MASK	0x0300
#define WL_LCHANSPEC_CTL_SB_SHIFT	     8
#define WL_LCHANSPEC_CTL_SB_LOWER	0x0100
#define WL_LCHANSPEC_CTL_SB_UPPER	0x0200
#define WL_LCHANSPEC_CTL_SB_NONE	0x0300

#define WL_LCHANSPEC_BW_MASK		0x0C00
#define WL_LCHANSPEC_BW_SHIFT		    10
#define WL_LCHANSPEC_BW_10		0x0400
#define WL_LCHANSPEC_BW_20		0x0800
#define WL_LCHANSPEC_BW_40		0x0C00

#define WL_LCHANSPEC_BAND_MASK		0xf000
#define WL_LCHANSPEC_BAND_SHIFT		    12
#define WL_LCHANSPEC_BAND_5G		0x1000
#define WL_LCHANSPEC_BAND_2G		0x2000

#define LCHSPEC_CHANNEL(chspec)	((uint8)((chspec) & WL_LCHANSPEC_CHAN_MASK))
#define LCHSPEC_BAND(chspec)	((chspec) & WL_LCHANSPEC_BAND_MASK)
#define LCHSPEC_CTL_SB(chspec)	((chspec) & WL_LCHANSPEC_CTL_SB_MASK)
#define LCHSPEC_BW(chspec)	((chspec) & WL_LCHANSPEC_BW_MASK)
#define LCHSPEC_IS10(chspec)	(((chspec) & WL_LCHANSPEC_BW_MASK) == WL_LCHANSPEC_BW_10)
#define LCHSPEC_IS20(chspec)	(((chspec) & WL_LCHANSPEC_BW_MASK) == WL_LCHANSPEC_BW_20)
#define LCHSPEC_IS40(chspec)	(((chspec) & WL_LCHANSPEC_BW_MASK) == WL_LCHANSPEC_BW_40)
#define LCHSPEC_IS5G(chspec)	(((chspec) & WL_LCHANSPEC_BAND_MASK) == WL_LCHANSPEC_BAND_5G)
#define LCHSPEC_IS2G(chspec)	(((chspec) & WL_LCHANSPEC_BAND_MASK) == WL_LCHANSPEC_BAND_2G)

#define LCHSPEC_CREATE(chan, band, bw, sb)  ((uint16)((chan) | (sb) | (bw) | (band)))

#endif /* D11AC_IOTYPES */

/*
 * WF_CHAN_FACTOR_* constants are used to calculate channel frequency
 * given a channel number.
 * chan_freq = chan_factor * 500Mhz + chan_number * 5
 */

/**
 * Channel Factor for the starting frequence of 2.4 GHz channels.
 * The value corresponds to 2407 MHz.
 */
#define WF_CHAN_FACTOR_2_4_G		4814	/* 2.4 GHz band, 2407 MHz */

/**
 * Channel Factor for the starting frequence of 5 GHz channels.
 * The value corresponds to 5000 MHz.
 */
#define WF_CHAN_FACTOR_5_G		10000	/* 5   GHz band, 5000 MHz */

/**
 * Channel Factor for the starting frequence of 4.9 GHz channels.
 * The value corresponds to 4000 MHz.
 */
#define WF_CHAN_FACTOR_4_G		8000	/* 4.9 GHz band for Japan */

#define WLC_2G_25MHZ_OFFSET		5	/* 2.4GHz band channel offset */

/**
 * Convert chanspec to ascii string
 *
 * @param	chspec		chanspec format
 * @param	buf		ascii string of chanspec
 *
 * @return	pointer to buf with room for at least CHANSPEC_STR_LEN bytes
 *
 * @see		CHANSPEC_STR_LEN
 */
extern char * wf_chspec_ntoa(chanspec_t chspec, char *buf);

/**
 * Convert ascii string to chanspec
 *
 * @param	a     pointer to input string
 *
 * @return	>= 0 if successful or 0 otherwise
 */
extern chanspec_t wf_chspec_aton(const char *a);

/**
 * Verify the chanspec fields are valid.
 *
 * Verify the chanspec is using a legal set field values, i.e. that the chanspec
 * specified a band, bw, ctl_sb and channel and that the combination could be
 * legal given some set of circumstances.
 *
 * @param	chanspec   input chanspec to verify
 *
 * @return TRUE if the chanspec is malformed, FALSE if it looks good.
 */
extern bool wf_chspec_malformed(chanspec_t chanspec);

/**
 * Verify the chanspec specifies a valid channel according to 802.11.
 *
 * @param	chanspec   input chanspec to verify
 *
 * @return TRUE if the chanspec is a valid 802.11 channel
 */
extern bool wf_chspec_valid(chanspec_t chanspec);

/**
 * Return the primary (control) channel.
 *
 * This function returns the channel number of the primary 20MHz channel. For
 * 20MHz channels this is just the channel number. For 40MHz or wider channels
 * it is the primary 20MHz channel specified by the chanspec.
 *
 * @param	chspec    input chanspec
 *
 * @return Returns the channel number of the primary 20MHz channel
 */
extern uint8 wf_chspec_ctlchan(chanspec_t chspec);

/**
 * Return the primary (control) chanspec.
 *
 * This function returns the chanspec of the primary 20MHz channel. For 20MHz
 * channels this is just the chanspec. For 40MHz or wider channels it is the
 * chanspec of the primary 20MHZ channel specified by the chanspec.
 *
 * @param	chspec    input chanspec
 *
 * @return Returns the chanspec of the primary 20MHz channel
 */
extern chanspec_t wf_chspec_ctlchspec(chanspec_t chspec);

/**
 * Return a channel number corresponding to a frequency.
 *
 * This function returns the chanspec for the primary 40MHz of an 80MHz channel.
 * The control sideband specifies the same 20MHz channel that the 80MHz channel is using
 * as the primary 20MHz channel.
 */
extern chanspec_t wf_chspec_primary40_chspec(chanspec_t chspec);

/*
 * Return the channel number for a given frequency and base frequency.
 * The returned channel number is relative to the given base frequency.
 * If the given base frequency is zero, a base frequency of 5 GHz is assumed for
 * frequencies from 5 - 6 GHz, and 2.407 GHz is assumed for 2.4 - 2.5 GHz.
 *
 * Frequency is specified in MHz.
 * The base frequency is specified as (start_factor * 500 kHz).
 * Constants WF_CHAN_FACTOR_2_4_G, WF_CHAN_FACTOR_5_G are defined for
 * 2.4 GHz and 5 GHz bands.
 *
 * The returned channel will be in the range [1, 14] in the 2.4 GHz band
 * and [0, 200] otherwise.
 * -1 is returned if the start_factor is WF_CHAN_FACTOR_2_4_G and the
 * frequency is not a 2.4 GHz channel, or if the frequency is not and even
 * multiple of 5 MHz from the base frequency to the base plus 1 GHz.
 *
 * Reference 802.11 REVma, section 17.3.8.3, and 802.11B section 18.4.6.2
 *
 * @param	freq          frequency in MHz
 * @param	start_factor  base frequency in 500 kHz units, e.g. 10000 for 5 GHz
 *
 * @return Returns a channel number
 *
 * @see  WF_CHAN_FACTOR_2_4_G
 * @see  WF_CHAN_FACTOR_5_G
 */
extern int wf_mhz2channel(uint freq, uint start_factor);

/**
 * Return the center frequency in MHz of the given channel and base frequency.
 *
 * Return the center frequency in MHz of the given channel and base frequency.
 * The channel number is interpreted relative to the given base frequency.
 *
 * The valid channel range is [1, 14] in the 2.4 GHz band and [0, 200] otherwise.
 * The base frequency is specified as (start_factor * 500 kHz).
 * Constants WF_CHAN_FACTOR_2_4_G, WF_CHAN_FACTOR_5_G are defined for
 * 2.4 GHz and 5 GHz bands.
 * The channel range of [1, 14] is only checked for a start_factor of
 * WF_CHAN_FACTOR_2_4_G (4814).
 * Odd start_factors produce channels on .5 MHz boundaries, in which case
 * the answer is rounded down to an integral MHz.
 * -1 is returned for an out of range channel.
 *
 * Reference 802.11 REVma, section 17.3.8.3, and 802.11B section 18.4.6.2
 *
 * @param	channel       input channel number
 * @param	start_factor  base frequency in 500 kHz units, e.g. 10000 for 5 GHz
 *
 * @return Returns a frequency in MHz
 *
 * @see  WF_CHAN_FACTOR_2_4_G
 * @see  WF_CHAN_FACTOR_5_G
 */
extern int wf_channel2mhz(uint channel, uint start_factor);

/**
 * Convert ctl chan and bw to chanspec
 *
 * @param	ctl_ch		channel
 * @param	bw	        bandwidth
 *
 * @return	> 0 if successful or 0 otherwise
 *
 */
extern uint16 wf_channel2chspec(uint ctl_ch, uint bw);

extern uint wf_channel2freq(uint channel);
extern uint wf_freq2channel(uint freq);


#endif	/* _bcmwifi_channels_h_ */