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/*
* 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
*
* 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.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)))
#define CH20MHZ_LCHSPEC(channel) \
(chanspec_t)((chanspec_t)(channel) | WL_LCHANSPEC_BW_20 | \
WL_LCHANSPEC_CTL_SB_NONE | (((channel) <= CH_MAX_2G_CHANNEL) ? \
WL_LCHANSPEC_BAND_2G : WL_LCHANSPEC_BAND_5G))
#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_ */