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Diffstat (limited to 'drivers/net/wireless/bcmdhd.1.28.23.x.cn/include/bcmwifi_channels.h')
| -rwxr-xr-x | drivers/net/wireless/bcmdhd.1.28.23.x.cn/include/bcmwifi_channels.h | 490 |
1 files changed, 490 insertions, 0 deletions
diff --git a/drivers/net/wireless/bcmdhd.1.28.23.x.cn/include/bcmwifi_channels.h b/drivers/net/wireless/bcmdhd.1.28.23.x.cn/include/bcmwifi_channels.h new file mode 100755 index 00000000..bc57aca2 --- /dev/null +++ b/drivers/net/wireless/bcmdhd.1.28.23.x.cn/include/bcmwifi_channels.h @@ -0,0 +1,490 @@ +/* + * 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) 1999-2012, 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.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 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 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 */ + +/* defined rate in 500kbps */ +#define WLC_MAXRATE 108 /* in 500kbps units */ +#define WLC_RATE_1M 2 /* in 500kbps units */ +#define WLC_RATE_2M 4 /* in 500kbps units */ +#define WLC_RATE_5M5 11 /* in 500kbps units */ +#define WLC_RATE_11M 22 /* in 500kbps units */ +#define WLC_RATE_6M 12 /* in 500kbps units */ +#define WLC_RATE_9M 18 /* in 500kbps units */ +#define WLC_RATE_12M 24 /* in 500kbps units */ +#define WLC_RATE_18M 36 /* in 500kbps units */ +#define WLC_RATE_24M 48 /* in 500kbps units */ +#define WLC_RATE_36M 72 /* in 500kbps units */ +#define WLC_RATE_48M 96 /* in 500kbps units */ +#define WLC_RATE_54M 108 /* in 500kbps units */ + +#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); + +#endif /* _bcmwifi_channels_h_ */ |