1 /* 2 * Misc utility routines for WL and Apps 3 * This header file housing the define and function prototype use by 4 * both the wl driver, tools & Apps. 5 * 6 * Copyright (C) 1999-2013, Broadcom Corporation 7 * 8 * Permission to use, copy, modify, and/or distribute this software for any 9 * purpose with or without fee is hereby granted, provided that the above 10 * copyright notice and this permission notice appear in all copies. 11 * 12 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 13 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 14 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 15 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 16 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION 17 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN 18 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 19 * 20 * $Id: bcmwifi_channels.h 309193 2012-01-19 00:03:57Z $ 21 */ 22 23 #ifndef _bcmwifi_channels_h_ 24 #define _bcmwifi_channels_h_ 25 26 27 /* A chanspec holds the channel number, band, bandwidth and control sideband */ 28 typedef uint16 chanspec_t; 29 30 /* channel defines */ 31 #define CH_UPPER_SB 0x01 32 #define CH_LOWER_SB 0x02 33 #define CH_EWA_VALID 0x04 34 #define CH_80MHZ_APART 16 35 #define CH_40MHZ_APART 8 36 #define CH_20MHZ_APART 4 37 #define CH_10MHZ_APART 2 38 #define CH_5MHZ_APART 1 /* 2G band channels are 5 Mhz apart */ 39 #define CH_MAX_2G_CHANNEL 14 /* Max channel in 2G band */ 40 #define MAXCHANNEL 224 /* max # supported channels. The max channel no is 216, 41 * this is that + 1 rounded up to a multiple of NBBY (8). 42 * DO NOT MAKE it > 255: channels are uint8's all over 43 */ 44 #define CHSPEC_CTLOVLP(sp1, sp2, sep) (ABS(wf_chspec_ctlchan(sp1) - wf_chspec_ctlchan(sp2)) < \ 45 (sep)) 46 47 /* All builds use the new 11ac ratespec/chanspec */ 48 #undef D11AC_IOTYPES 49 #define D11AC_IOTYPES 50 51 #ifndef D11AC_IOTYPES 52 53 #define WL_CHANSPEC_CHAN_MASK 0x00ff 54 #define WL_CHANSPEC_CHAN_SHIFT 0 55 56 #define WL_CHANSPEC_CTL_SB_MASK 0x0300 57 #define WL_CHANSPEC_CTL_SB_SHIFT 8 58 #define WL_CHANSPEC_CTL_SB_LOWER 0x0100 59 #define WL_CHANSPEC_CTL_SB_UPPER 0x0200 60 #define WL_CHANSPEC_CTL_SB_NONE 0x0300 61 62 #define WL_CHANSPEC_BW_MASK 0x0C00 63 #define WL_CHANSPEC_BW_SHIFT 10 64 #define WL_CHANSPEC_BW_10 0x0400 65 #define WL_CHANSPEC_BW_20 0x0800 66 #define WL_CHANSPEC_BW_40 0x0C00 67 68 #define WL_CHANSPEC_BAND_MASK 0xf000 69 #define WL_CHANSPEC_BAND_SHIFT 12 70 #ifdef WL_CHANSPEC_BAND_5G 71 #undef WL_CHANSPEC_BAND_5G 72 #endif 73 #ifdef WL_CHANSPEC_BAND_2G 74 #undef WL_CHANSPEC_BAND_2G 75 #endif 76 #define WL_CHANSPEC_BAND_5G 0x1000 77 #define WL_CHANSPEC_BAND_2G 0x2000 78 #define INVCHANSPEC 255 79 80 /* channel defines */ 81 #define LOWER_20_SB(channel) (((channel) > CH_10MHZ_APART) ? ((channel) - CH_10MHZ_APART) : 0) 82 #define UPPER_20_SB(channel) (((channel) < (MAXCHANNEL - CH_10MHZ_APART)) ? \ 83 ((channel) + CH_10MHZ_APART) : 0) 84 85 #define LL_20_SB(channel) (((channel) > 3 * CH_10MHZ_APART) ? ((channel) - 3 * CH_10MHZ_APART) : 0) 86 #define UU_20_SB(channel) (((channel) < (MAXCHANNEL - 3 * CH_10MHZ_APART)) ? \ 87 ((channel) + 3 * CH_10MHZ_APART) : 0) 88 #define LU_20_SB(channel) LOWER_20_SB(channel) 89 #define UL_20_SB(channel) UPPER_20_SB(channel) 90 91 #define CHSPEC_WLCBANDUNIT(chspec) (CHSPEC_IS5G(chspec) ? BAND_5G_INDEX : BAND_2G_INDEX) 92 #define CH20MHZ_CHSPEC(channel) (chanspec_t)((chanspec_t)(channel) | WL_CHANSPEC_BW_20 | \ 93 WL_CHANSPEC_CTL_SB_NONE | (((channel) <= CH_MAX_2G_CHANNEL) ? \ 94 WL_CHANSPEC_BAND_2G : WL_CHANSPEC_BAND_5G)) 95 #define NEXT_20MHZ_CHAN(channel) (((channel) < (MAXCHANNEL - CH_20MHZ_APART)) ? \ 96 ((channel) + CH_20MHZ_APART) : 0) 97 #define CH40MHZ_CHSPEC(channel, ctlsb) (chanspec_t) \ 98 ((channel) | (ctlsb) | WL_CHANSPEC_BW_40 | \ 99 ((channel) <= CH_MAX_2G_CHANNEL ? WL_CHANSPEC_BAND_2G : \ 100 WL_CHANSPEC_BAND_5G)) 101 #define CHSPEC_CHANNEL(chspec) ((uint8)((chspec) & WL_CHANSPEC_CHAN_MASK)) 102 #define CHSPEC_BAND(chspec) ((chspec) & WL_CHANSPEC_BAND_MASK) 103 104 /* chanspec stores radio channel & flags to indicate control channel location, i.e. upper/lower */ 105 #define CHSPEC_CTL_SB(chspec) ((chspec) & WL_CHANSPEC_CTL_SB_MASK) 106 #define CHSPEC_BW(chspec) ((chspec) & WL_CHANSPEC_BW_MASK) 107 108 #ifdef WL11N_20MHZONLY 109 110 #define CHSPEC_IS10(chspec) 0 111 #define CHSPEC_IS20(chspec) 1 112 #ifndef CHSPEC_IS40 113 #define CHSPEC_IS40(chspec) 0 114 #endif 115 116 #else /* !WL11N_20MHZONLY */ 117 118 #define CHSPEC_IS10(chspec) (((chspec) & WL_CHANSPEC_BW_MASK) == WL_CHANSPEC_BW_10) 119 #define CHSPEC_IS20(chspec) (((chspec) & WL_CHANSPEC_BW_MASK) == WL_CHANSPEC_BW_20) 120 #ifndef CHSPEC_IS40 121 #define CHSPEC_IS40(chspec) (((chspec) & WL_CHANSPEC_BW_MASK) == WL_CHANSPEC_BW_40) 122 #endif 123 124 #endif /* !WL11N_20MHZONLY */ 125 126 #define CHSPEC_IS5G(chspec) (((chspec) & WL_CHANSPEC_BAND_MASK) == WL_CHANSPEC_BAND_5G) 127 #define CHSPEC_IS2G(chspec) (((chspec) & WL_CHANSPEC_BAND_MASK) == WL_CHANSPEC_BAND_2G) 128 #define CHSPEC_SB_NONE(chspec) (((chspec) & WL_CHANSPEC_CTL_SB_MASK) == WL_CHANSPEC_CTL_SB_NONE) 129 #define CHSPEC_SB_UPPER(chspec) (((chspec) & WL_CHANSPEC_CTL_SB_MASK) == WL_CHANSPEC_CTL_SB_UPPER) 130 #define CHSPEC_SB_LOWER(chspec) (((chspec) & WL_CHANSPEC_CTL_SB_MASK) == WL_CHANSPEC_CTL_SB_LOWER) 131 #define CHSPEC_CTL_CHAN(chspec) ((CHSPEC_SB_LOWER(chspec)) ? \ 132 (LOWER_20_SB(((chspec) & WL_CHANSPEC_CHAN_MASK))) : \ 133 (UPPER_20_SB(((chspec) & WL_CHANSPEC_CHAN_MASK)))) 134 #define CHSPEC2WLC_BAND(chspec) (CHSPEC_IS5G(chspec) ? WLC_BAND_5G : WLC_BAND_2G) 135 136 #define CHANSPEC_STR_LEN 8 137 138 #else /* D11AC_IOTYPES */ 139 140 #define WL_CHANSPEC_CHAN_MASK 0x00ff 141 #define WL_CHANSPEC_CHAN_SHIFT 0 142 #define WL_CHANSPEC_CHAN1_MASK 0x000f 143 #define WL_CHANSPEC_CHAN1_SHIFT 0 144 #define WL_CHANSPEC_CHAN2_MASK 0x00f0 145 #define WL_CHANSPEC_CHAN2_SHIFT 4 146 147 #define WL_CHANSPEC_CTL_SB_MASK 0x0700 148 #define WL_CHANSPEC_CTL_SB_SHIFT 8 149 #define WL_CHANSPEC_CTL_SB_LLL 0x0000 150 #define WL_CHANSPEC_CTL_SB_LLU 0x0100 151 #define WL_CHANSPEC_CTL_SB_LUL 0x0200 152 #define WL_CHANSPEC_CTL_SB_LUU 0x0300 153 #define WL_CHANSPEC_CTL_SB_ULL 0x0400 154 #define WL_CHANSPEC_CTL_SB_ULU 0x0500 155 #define WL_CHANSPEC_CTL_SB_UUL 0x0600 156 #define WL_CHANSPEC_CTL_SB_UUU 0x0700 157 #define WL_CHANSPEC_CTL_SB_LL WL_CHANSPEC_CTL_SB_LLL 158 #define WL_CHANSPEC_CTL_SB_LU WL_CHANSPEC_CTL_SB_LLU 159 #define WL_CHANSPEC_CTL_SB_UL WL_CHANSPEC_CTL_SB_LUL 160 #define WL_CHANSPEC_CTL_SB_UU WL_CHANSPEC_CTL_SB_LUU 161 #define WL_CHANSPEC_CTL_SB_L WL_CHANSPEC_CTL_SB_LLL 162 #define WL_CHANSPEC_CTL_SB_U WL_CHANSPEC_CTL_SB_LLU 163 #define WL_CHANSPEC_CTL_SB_LOWER WL_CHANSPEC_CTL_SB_LLL 164 #define WL_CHANSPEC_CTL_SB_UPPER WL_CHANSPEC_CTL_SB_LLU 165 166 #define WL_CHANSPEC_BW_MASK 0x3800 167 #define WL_CHANSPEC_BW_SHIFT 11 168 #define WL_CHANSPEC_BW_5 0x0000 169 #define WL_CHANSPEC_BW_10 0x0800 170 #define WL_CHANSPEC_BW_20 0x1000 171 #define WL_CHANSPEC_BW_40 0x1800 172 #define WL_CHANSPEC_BW_80 0x2000 173 #define WL_CHANSPEC_BW_160 0x2800 174 #define WL_CHANSPEC_BW_8080 0x3000 175 176 #define WL_CHANSPEC_BAND_MASK 0xc000 177 #define WL_CHANSPEC_BAND_SHIFT 14 178 #define WL_CHANSPEC_BAND_2G 0x0000 179 #define WL_CHANSPEC_BAND_3G 0x4000 180 #define WL_CHANSPEC_BAND_4G 0x8000 181 #define WL_CHANSPEC_BAND_5G 0xc000 182 #define INVCHANSPEC 255 183 184 /* channel defines */ 185 #define LOWER_20_SB(channel) (((channel) > CH_10MHZ_APART) ? \ 186 ((channel) - CH_10MHZ_APART) : 0) 187 #define UPPER_20_SB(channel) (((channel) < (MAXCHANNEL - CH_10MHZ_APART)) ? \ 188 ((channel) + CH_10MHZ_APART) : 0) 189 190 #define LL_20_SB(channel) (((channel) > 3 * CH_10MHZ_APART) ? ((channel) - 3 * CH_10MHZ_APART) : 0) 191 #define UU_20_SB(channel) (((channel) < (MAXCHANNEL - 3 * CH_10MHZ_APART)) ? \ 192 ((channel) + 3 * CH_10MHZ_APART) : 0) 193 #define LU_20_SB(channel) LOWER_20_SB(channel) 194 #define UL_20_SB(channel) UPPER_20_SB(channel) 195 196 #define LOWER_40_SB(channel) ((channel) - CH_20MHZ_APART) 197 #define UPPER_40_SB(channel) ((channel) + CH_20MHZ_APART) 198 #define CHSPEC_WLCBANDUNIT(chspec) (CHSPEC_IS5G(chspec) ? BAND_5G_INDEX : BAND_2G_INDEX) 199 #define CH20MHZ_CHSPEC(channel) (chanspec_t)((chanspec_t)(channel) | WL_CHANSPEC_BW_20 | \ 200 (((channel) <= CH_MAX_2G_CHANNEL) ? \ 201 WL_CHANSPEC_BAND_2G : WL_CHANSPEC_BAND_5G)) 202 #define NEXT_20MHZ_CHAN(channel) (((channel) < (MAXCHANNEL - CH_20MHZ_APART)) ? \ 203 ((channel) + CH_20MHZ_APART) : 0) 204 #define CH40MHZ_CHSPEC(channel, ctlsb) (chanspec_t) \ 205 ((channel) | (ctlsb) | WL_CHANSPEC_BW_40 | \ 206 ((channel) <= CH_MAX_2G_CHANNEL ? WL_CHANSPEC_BAND_2G : \ 207 WL_CHANSPEC_BAND_5G)) 208 #define CH80MHZ_CHSPEC(channel, ctlsb) (chanspec_t) \ 209 ((channel) | (ctlsb) | \ 210 WL_CHANSPEC_BW_80 | WL_CHANSPEC_BAND_5G) 211 #define CH160MHZ_CHSPEC(channel, ctlsb) (chanspec_t) \ 212 ((channel) | (ctlsb) | \ 213 WL_CHANSPEC_BW_160 | WL_CHANSPEC_BAND_5G) 214 215 /* simple MACROs to get different fields of chanspec */ 216 #define CHSPEC_CHANNEL(chspec) ((uint8)((chspec) & WL_CHANSPEC_CHAN_MASK)) 217 #define CHSPEC_CHAN1(chspec) ((chspec) & WL_CHANSPEC_CHAN1_MASK) 218 #define CHSPEC_CHAN2(chspec) ((chspec) & WL_CHANSPEC_CHAN2_MASK) 219 #define CHSPEC_BAND(chspec) ((chspec) & WL_CHANSPEC_BAND_MASK) 220 #define CHSPEC_CTL_SB(chspec) ((chspec) & WL_CHANSPEC_CTL_SB_MASK) 221 #define CHSPEC_BW(chspec) ((chspec) & WL_CHANSPEC_BW_MASK) 222 223 #ifdef WL11N_20MHZONLY 224 225 #define CHSPEC_IS10(chspec) 0 226 #define CHSPEC_IS20(chspec) 1 227 #ifndef CHSPEC_IS40 228 #define CHSPEC_IS40(chspec) 0 229 #endif 230 #ifndef CHSPEC_IS80 231 #define CHSPEC_IS80(chspec) 0 232 #endif 233 #ifndef CHSPEC_IS160 234 #define CHSPEC_IS160(chspec) 0 235 #endif 236 #ifndef CHSPEC_IS8080 237 #define CHSPEC_IS8080(chspec) 0 238 #endif 239 240 #else /* !WL11N_20MHZONLY */ 241 242 #define CHSPEC_IS10(chspec) (((chspec) & WL_CHANSPEC_BW_MASK) == WL_CHANSPEC_BW_10) 243 #define CHSPEC_IS20(chspec) (((chspec) & WL_CHANSPEC_BW_MASK) == WL_CHANSPEC_BW_20) 244 #ifndef CHSPEC_IS40 245 #define CHSPEC_IS40(chspec) (((chspec) & WL_CHANSPEC_BW_MASK) == WL_CHANSPEC_BW_40) 246 #endif 247 #ifndef CHSPEC_IS80 248 #define CHSPEC_IS80(chspec) (((chspec) & WL_CHANSPEC_BW_MASK) == WL_CHANSPEC_BW_80) 249 #endif 250 #ifndef CHSPEC_IS160 251 #define CHSPEC_IS160(chspec) (((chspec) & WL_CHANSPEC_BW_MASK) == WL_CHANSPEC_BW_160) 252 #endif 253 #ifndef CHSPEC_IS8080 254 #define CHSPEC_IS8080(chspec) (((chspec) & WL_CHANSPEC_BW_MASK) == WL_CHANSPEC_BW_8080) 255 #endif 256 257 #endif /* !WL11N_20MHZONLY */ 258 259 #define CHSPEC_IS5G(chspec) (((chspec) & WL_CHANSPEC_BAND_MASK) == WL_CHANSPEC_BAND_5G) 260 #define CHSPEC_IS2G(chspec) (((chspec) & WL_CHANSPEC_BAND_MASK) == WL_CHANSPEC_BAND_2G) 261 #define CHSPEC_SB_UPPER(chspec) \ 262 ((((chspec) & WL_CHANSPEC_CTL_SB_MASK) == WL_CHANSPEC_CTL_SB_UPPER) && \ 263 (((chspec) & WL_CHANSPEC_BW_MASK) == WL_CHANSPEC_BW_40)) 264 #define CHSPEC_SB_LOWER(chspec) \ 265 ((((chspec) & WL_CHANSPEC_CTL_SB_MASK) == WL_CHANSPEC_CTL_SB_LOWER) && \ 266 (((chspec) & WL_CHANSPEC_BW_MASK) == WL_CHANSPEC_BW_40)) 267 #define CHSPEC2WLC_BAND(chspec) (CHSPEC_IS5G(chspec) ? WLC_BAND_5G : WLC_BAND_2G) 268 269 /** 270 * Number of chars needed for wf_chspec_ntoa() destination character buffer. 271 */ 272 #define CHANSPEC_STR_LEN 20 273 274 275 /* Legacy Chanspec defines 276 * These are the defines for the previous format of the chanspec_t 277 */ 278 #define WL_LCHANSPEC_CHAN_MASK 0x00ff 279 #define WL_LCHANSPEC_CHAN_SHIFT 0 280 281 #define WL_LCHANSPEC_CTL_SB_MASK 0x0300 282 #define WL_LCHANSPEC_CTL_SB_SHIFT 8 283 #define WL_LCHANSPEC_CTL_SB_LOWER 0x0100 284 #define WL_LCHANSPEC_CTL_SB_UPPER 0x0200 285 #define WL_LCHANSPEC_CTL_SB_NONE 0x0300 286 287 #define WL_LCHANSPEC_BW_MASK 0x0C00 288 #define WL_LCHANSPEC_BW_SHIFT 10 289 #define WL_LCHANSPEC_BW_10 0x0400 290 #define WL_LCHANSPEC_BW_20 0x0800 291 #define WL_LCHANSPEC_BW_40 0x0C00 292 293 #define WL_LCHANSPEC_BAND_MASK 0xf000 294 #define WL_LCHANSPEC_BAND_SHIFT 12 295 #define WL_LCHANSPEC_BAND_5G 0x1000 296 #define WL_LCHANSPEC_BAND_2G 0x2000 297 298 #define LCHSPEC_CHANNEL(chspec) ((uint8)((chspec) & WL_LCHANSPEC_CHAN_MASK)) 299 #define LCHSPEC_BAND(chspec) ((chspec) & WL_LCHANSPEC_BAND_MASK) 300 #define LCHSPEC_CTL_SB(chspec) ((chspec) & WL_LCHANSPEC_CTL_SB_MASK) 301 #define LCHSPEC_BW(chspec) ((chspec) & WL_LCHANSPEC_BW_MASK) 302 #define LCHSPEC_IS10(chspec) (((chspec) & WL_LCHANSPEC_BW_MASK) == WL_LCHANSPEC_BW_10) 303 #define LCHSPEC_IS20(chspec) (((chspec) & WL_LCHANSPEC_BW_MASK) == WL_LCHANSPEC_BW_20) 304 #define LCHSPEC_IS40(chspec) (((chspec) & WL_LCHANSPEC_BW_MASK) == WL_LCHANSPEC_BW_40) 305 #define LCHSPEC_IS5G(chspec) (((chspec) & WL_LCHANSPEC_BAND_MASK) == WL_LCHANSPEC_BAND_5G) 306 #define LCHSPEC_IS2G(chspec) (((chspec) & WL_LCHANSPEC_BAND_MASK) == WL_LCHANSPEC_BAND_2G) 307 308 #define LCHSPEC_CREATE(chan, band, bw, sb) ((uint16)((chan) | (sb) | (bw) | (band))) 309 310 #endif /* D11AC_IOTYPES */ 311 312 /* 313 * WF_CHAN_FACTOR_* constants are used to calculate channel frequency 314 * given a channel number. 315 * chan_freq = chan_factor * 500Mhz + chan_number * 5 316 */ 317 318 /** 319 * Channel Factor for the starting frequence of 2.4 GHz channels. 320 * The value corresponds to 2407 MHz. 321 */ 322 #define WF_CHAN_FACTOR_2_4_G 4814 /* 2.4 GHz band, 2407 MHz */ 323 324 /** 325 * Channel Factor for the starting frequence of 5 GHz channels. 326 * The value corresponds to 5000 MHz. 327 */ 328 #define WF_CHAN_FACTOR_5_G 10000 /* 5 GHz band, 5000 MHz */ 329 330 /** 331 * Channel Factor for the starting frequence of 4.9 GHz channels. 332 * The value corresponds to 4000 MHz. 333 */ 334 #define WF_CHAN_FACTOR_4_G 8000 /* 4.9 GHz band for Japan */ 335 336 #define WLC_2G_25MHZ_OFFSET 5 /* 2.4GHz band channel offset */ 337 338 /** 339 * Convert chanspec to ascii string 340 * 341 * @param chspec chanspec format 342 * @param buf ascii string of chanspec 343 * 344 * @return pointer to buf with room for at least CHANSPEC_STR_LEN bytes 345 * 346 * @see CHANSPEC_STR_LEN 347 */ 348 extern char * wf_chspec_ntoa(chanspec_t chspec, char *buf); 349 350 /** 351 * Convert ascii string to chanspec 352 * 353 * @param a pointer to input string 354 * 355 * @return >= 0 if successful or 0 otherwise 356 */ 357 extern chanspec_t wf_chspec_aton(const char *a); 358 359 /** 360 * Verify the chanspec fields are valid. 361 * 362 * Verify the chanspec is using a legal set field values, i.e. that the chanspec 363 * specified a band, bw, ctl_sb and channel and that the combination could be 364 * legal given some set of circumstances. 365 * 366 * @param chanspec input chanspec to verify 367 * 368 * @return TRUE if the chanspec is malformed, FALSE if it looks good. 369 */ 370 extern bool wf_chspec_malformed(chanspec_t chanspec); 371 372 /** 373 * Verify the chanspec specifies a valid channel according to 802.11. 374 * 375 * @param chanspec input chanspec to verify 376 * 377 * @return TRUE if the chanspec is a valid 802.11 channel 378 */ 379 extern bool wf_chspec_valid(chanspec_t chanspec); 380 381 /** 382 * Return the primary (control) channel. 383 * 384 * This function returns the channel number of the primary 20MHz channel. For 385 * 20MHz channels this is just the channel number. For 40MHz or wider channels 386 * it is the primary 20MHz channel specified by the chanspec. 387 * 388 * @param chspec input chanspec 389 * 390 * @return Returns the channel number of the primary 20MHz channel 391 */ 392 extern uint8 wf_chspec_ctlchan(chanspec_t chspec); 393 394 /** 395 * Return the primary (control) chanspec. 396 * 397 * This function returns the chanspec of the primary 20MHz channel. For 20MHz 398 * channels this is just the chanspec. For 40MHz or wider channels it is the 399 * chanspec of the primary 20MHZ channel specified by the chanspec. 400 * 401 * @param chspec input chanspec 402 * 403 * @return Returns the chanspec of the primary 20MHz channel 404 */ 405 extern chanspec_t wf_chspec_ctlchspec(chanspec_t chspec); 406 407 /** 408 * Return a channel number corresponding to a frequency. 409 * 410 * This function returns the chanspec for the primary 40MHz of an 80MHz channel. 411 * The control sideband specifies the same 20MHz channel that the 80MHz channel is using 412 * as the primary 20MHz channel. 413 */ 414 extern chanspec_t wf_chspec_primary40_chspec(chanspec_t chspec); 415 416 /* 417 * Return the channel number for a given frequency and base frequency. 418 * The returned channel number is relative to the given base frequency. 419 * If the given base frequency is zero, a base frequency of 5 GHz is assumed for 420 * frequencies from 5 - 6 GHz, and 2.407 GHz is assumed for 2.4 - 2.5 GHz. 421 * 422 * Frequency is specified in MHz. 423 * The base frequency is specified as (start_factor * 500 kHz). 424 * Constants WF_CHAN_FACTOR_2_4_G, WF_CHAN_FACTOR_5_G are defined for 425 * 2.4 GHz and 5 GHz bands. 426 * 427 * The returned channel will be in the range [1, 14] in the 2.4 GHz band 428 * and [0, 200] otherwise. 429 * -1 is returned if the start_factor is WF_CHAN_FACTOR_2_4_G and the 430 * frequency is not a 2.4 GHz channel, or if the frequency is not and even 431 * multiple of 5 MHz from the base frequency to the base plus 1 GHz. 432 * 433 * Reference 802.11 REVma, section 17.3.8.3, and 802.11B section 18.4.6.2 434 * 435 * @param freq frequency in MHz 436 * @param start_factor base frequency in 500 kHz units, e.g. 10000 for 5 GHz 437 * 438 * @return Returns a channel number 439 * 440 * @see WF_CHAN_FACTOR_2_4_G 441 * @see WF_CHAN_FACTOR_5_G 442 */ 443 extern int wf_mhz2channel(uint freq, uint start_factor); 444 445 /** 446 * Return the center frequency in MHz of the given channel and base frequency. 447 * 448 * Return the center frequency in MHz of the given channel and base frequency. 449 * The channel number is interpreted relative to the given base frequency. 450 * 451 * The valid channel range is [1, 14] in the 2.4 GHz band and [0, 200] otherwise. 452 * The base frequency is specified as (start_factor * 500 kHz). 453 * Constants WF_CHAN_FACTOR_2_4_G, WF_CHAN_FACTOR_5_G are defined for 454 * 2.4 GHz and 5 GHz bands. 455 * The channel range of [1, 14] is only checked for a start_factor of 456 * WF_CHAN_FACTOR_2_4_G (4814). 457 * Odd start_factors produce channels on .5 MHz boundaries, in which case 458 * the answer is rounded down to an integral MHz. 459 * -1 is returned for an out of range channel. 460 * 461 * Reference 802.11 REVma, section 17.3.8.3, and 802.11B section 18.4.6.2 462 * 463 * @param channel input channel number 464 * @param start_factor base frequency in 500 kHz units, e.g. 10000 for 5 GHz 465 * 466 * @return Returns a frequency in MHz 467 * 468 * @see WF_CHAN_FACTOR_2_4_G 469 * @see WF_CHAN_FACTOR_5_G 470 */ 471 extern int wf_channel2mhz(uint channel, uint start_factor); 472 473 /** 474 * Convert ctl chan and bw to chanspec 475 * 476 * @param ctl_ch channel 477 * @param bw bandwidth 478 * 479 * @return > 0 if successful or 0 otherwise 480 * 481 */ 482 extern uint16 wf_channel2chspec(uint ctl_ch, uint bw); 483 484 extern uint wf_channel2freq(uint channel); 485 extern uint wf_freq2channel(uint freq); 486 487 488 #endif /* _bcmwifi_channels_h_ */ 489
