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 * Unless you and Broadcom execute a separate written software license 9 * agreement governing use of this software, this software is licensed to you 10 * under the terms of the GNU General Public License version 2 (the "GPL"), 11 * available at http://www.broadcom.com/licenses/GPLv2.php, with the 12 * following added to such license: 13 * 14 * As a special exception, the copyright holders of this software give you 15 * permission to link this software with independent modules, and to copy and 16 * distribute the resulting executable under terms of your choice, provided that 17 * you also meet, for each linked independent module, the terms and conditions of 18 * the license of that module. An independent module is a module which is not 19 * derived from this software. The special exception does not apply to any 20 * modifications of the software. 21 * 22 * Notwithstanding the above, under no circumstances may you combine this 23 * software in any way with any other Broadcom software provided under a license 24 * other than the GPL, without Broadcom's express prior written consent. 25 * 26 * $Id: bcmwifi_channels.h 309193 2012-01-19 00:03:57Z $ 27 */ 28 29 #ifndef _bcmwifi_channels_h_ 30 #define _bcmwifi_channels_h_ 31 32 33 /* A chanspec holds the channel number, band, bandwidth and control sideband */ 34 typedef uint16 chanspec_t; 35 36 /* channel defines */ 37 #define CH_UPPER_SB 0x01 38 #define CH_LOWER_SB 0x02 39 #define CH_EWA_VALID 0x04 40 #define CH_80MHZ_APART 16 41 #define CH_40MHZ_APART 8 42 #define CH_20MHZ_APART 4 43 #define CH_10MHZ_APART 2 44 #define CH_5MHZ_APART 1 /* 2G band channels are 5 Mhz apart */ 45 #define CH_MAX_2G_CHANNEL 14 /* Max channel in 2G band */ 46 #define MAXCHANNEL 224 /* max # supported channels. The max channel no is 216, 47 * this is that + 1 rounded up to a multiple of NBBY (8). 48 * DO NOT MAKE it > 255: channels are uint8's all over 49 */ 50 #define CHSPEC_CTLOVLP(sp1, sp2, sep) (ABS(wf_chspec_ctlchan(sp1) - wf_chspec_ctlchan(sp2)) < \ 51 (sep)) 52 53 /* All builds use the new 11ac ratespec/chanspec */ 54 #undef D11AC_IOTYPES 55 #define D11AC_IOTYPES 56 57 #ifndef D11AC_IOTYPES 58 59 #define WL_CHANSPEC_CHAN_MASK 0x00ff 60 #define WL_CHANSPEC_CHAN_SHIFT 0 61 62 #define WL_CHANSPEC_CTL_SB_MASK 0x0300 63 #define WL_CHANSPEC_CTL_SB_SHIFT 8 64 #define WL_CHANSPEC_CTL_SB_LOWER 0x0100 65 #define WL_CHANSPEC_CTL_SB_UPPER 0x0200 66 #define WL_CHANSPEC_CTL_SB_NONE 0x0300 67 68 #define WL_CHANSPEC_BW_MASK 0x0C00 69 #define WL_CHANSPEC_BW_SHIFT 10 70 #define WL_CHANSPEC_BW_10 0x0400 71 #define WL_CHANSPEC_BW_20 0x0800 72 #define WL_CHANSPEC_BW_40 0x0C00 73 74 #define WL_CHANSPEC_BAND_MASK 0xf000 75 #define WL_CHANSPEC_BAND_SHIFT 12 76 #ifdef WL_CHANSPEC_BAND_5G 77 #undef WL_CHANSPEC_BAND_5G 78 #endif 79 #ifdef WL_CHANSPEC_BAND_2G 80 #undef WL_CHANSPEC_BAND_2G 81 #endif 82 #define WL_CHANSPEC_BAND_5G 0x1000 83 #define WL_CHANSPEC_BAND_2G 0x2000 84 #define INVCHANSPEC 255 85 86 /* channel defines */ 87 #define LOWER_20_SB(channel) (((channel) > CH_10MHZ_APART) ? ((channel) - CH_10MHZ_APART) : 0) 88 #define UPPER_20_SB(channel) (((channel) < (MAXCHANNEL - CH_10MHZ_APART)) ? \ 89 ((channel) + CH_10MHZ_APART) : 0) 90 91 #define LL_20_SB(channel) (((channel) > 3 * CH_10MHZ_APART) ? ((channel) - 3 * CH_10MHZ_APART) : 0) 92 #define UU_20_SB(channel) (((channel) < (MAXCHANNEL - 3 * CH_10MHZ_APART)) ? \ 93 ((channel) + 3 * CH_10MHZ_APART) : 0) 94 #define LU_20_SB(channel) LOWER_20_SB(channel) 95 #define UL_20_SB(channel) UPPER_20_SB(channel) 96 97 #define CHSPEC_WLCBANDUNIT(chspec) (CHSPEC_IS5G(chspec) ? BAND_5G_INDEX : BAND_2G_INDEX) 98 #define CH20MHZ_CHSPEC(channel) (chanspec_t)((chanspec_t)(channel) | WL_CHANSPEC_BW_20 | \ 99 WL_CHANSPEC_CTL_SB_NONE | (((channel) <= CH_MAX_2G_CHANNEL) ? \ 100 WL_CHANSPEC_BAND_2G : WL_CHANSPEC_BAND_5G)) 101 #define NEXT_20MHZ_CHAN(channel) (((channel) < (MAXCHANNEL - CH_20MHZ_APART)) ? \ 102 ((channel) + CH_20MHZ_APART) : 0) 103 #define CH40MHZ_CHSPEC(channel, ctlsb) (chanspec_t) \ 104 ((channel) | (ctlsb) | WL_CHANSPEC_BW_40 | \ 105 ((channel) <= CH_MAX_2G_CHANNEL ? WL_CHANSPEC_BAND_2G : \ 106 WL_CHANSPEC_BAND_5G)) 107 #define CHSPEC_CHANNEL(chspec) ((uint8)((chspec) & WL_CHANSPEC_CHAN_MASK)) 108 #define CHSPEC_BAND(chspec) ((chspec) & WL_CHANSPEC_BAND_MASK) 109 110 /* chanspec stores radio channel & flags to indicate control channel location, i.e. upper/lower */ 111 #define CHSPEC_CTL_SB(chspec) ((chspec) & WL_CHANSPEC_CTL_SB_MASK) 112 #define CHSPEC_BW(chspec) ((chspec) & WL_CHANSPEC_BW_MASK) 113 114 #ifdef WL11N_20MHZONLY 115 116 #define CHSPEC_IS10(chspec) 0 117 #define CHSPEC_IS20(chspec) 1 118 #ifndef CHSPEC_IS40 119 #define CHSPEC_IS40(chspec) 0 120 #endif 121 122 #else /* !WL11N_20MHZONLY */ 123 124 #define CHSPEC_IS10(chspec) (((chspec) & WL_CHANSPEC_BW_MASK) == WL_CHANSPEC_BW_10) 125 #define CHSPEC_IS20(chspec) (((chspec) & WL_CHANSPEC_BW_MASK) == WL_CHANSPEC_BW_20) 126 #ifndef CHSPEC_IS40 127 #define CHSPEC_IS40(chspec) (((chspec) & WL_CHANSPEC_BW_MASK) == WL_CHANSPEC_BW_40) 128 #endif 129 130 #endif /* !WL11N_20MHZONLY */ 131 132 #define CHSPEC_IS5G(chspec) (((chspec) & WL_CHANSPEC_BAND_MASK) == WL_CHANSPEC_BAND_5G) 133 #define CHSPEC_IS2G(chspec) (((chspec) & WL_CHANSPEC_BAND_MASK) == WL_CHANSPEC_BAND_2G) 134 #define CHSPEC_SB_NONE(chspec) (((chspec) & WL_CHANSPEC_CTL_SB_MASK) == WL_CHANSPEC_CTL_SB_NONE) 135 #define CHSPEC_SB_UPPER(chspec) (((chspec) & WL_CHANSPEC_CTL_SB_MASK) == WL_CHANSPEC_CTL_SB_UPPER) 136 #define CHSPEC_SB_LOWER(chspec) (((chspec) & WL_CHANSPEC_CTL_SB_MASK) == WL_CHANSPEC_CTL_SB_LOWER) 137 #define CHSPEC_CTL_CHAN(chspec) ((CHSPEC_SB_LOWER(chspec)) ? \ 138 (LOWER_20_SB(((chspec) & WL_CHANSPEC_CHAN_MASK))) : \ 139 (UPPER_20_SB(((chspec) & WL_CHANSPEC_CHAN_MASK)))) 140 #define CHSPEC2WLC_BAND(chspec) (CHSPEC_IS5G(chspec) ? WLC_BAND_5G : WLC_BAND_2G) 141 142 #define CHANSPEC_STR_LEN 8 143 144 #else /* D11AC_IOTYPES */ 145 146 #define WL_CHANSPEC_CHAN_MASK 0x00ff 147 #define WL_CHANSPEC_CHAN_SHIFT 0 148 #define WL_CHANSPEC_CHAN1_MASK 0x000f 149 #define WL_CHANSPEC_CHAN1_SHIFT 0 150 #define WL_CHANSPEC_CHAN2_MASK 0x00f0 151 #define WL_CHANSPEC_CHAN2_SHIFT 4 152 153 #define WL_CHANSPEC_CTL_SB_MASK 0x0700 154 #define WL_CHANSPEC_CTL_SB_SHIFT 8 155 #define WL_CHANSPEC_CTL_SB_LLL 0x0000 156 #define WL_CHANSPEC_CTL_SB_LLU 0x0100 157 #define WL_CHANSPEC_CTL_SB_LUL 0x0200 158 #define WL_CHANSPEC_CTL_SB_LUU 0x0300 159 #define WL_CHANSPEC_CTL_SB_ULL 0x0400 160 #define WL_CHANSPEC_CTL_SB_ULU 0x0500 161 #define WL_CHANSPEC_CTL_SB_UUL 0x0600 162 #define WL_CHANSPEC_CTL_SB_UUU 0x0700 163 #define WL_CHANSPEC_CTL_SB_LL WL_CHANSPEC_CTL_SB_LLL 164 #define WL_CHANSPEC_CTL_SB_LU WL_CHANSPEC_CTL_SB_LLU 165 #define WL_CHANSPEC_CTL_SB_UL WL_CHANSPEC_CTL_SB_LUL 166 #define WL_CHANSPEC_CTL_SB_UU WL_CHANSPEC_CTL_SB_LUU 167 #define WL_CHANSPEC_CTL_SB_L WL_CHANSPEC_CTL_SB_LLL 168 #define WL_CHANSPEC_CTL_SB_U WL_CHANSPEC_CTL_SB_LLU 169 #define WL_CHANSPEC_CTL_SB_LOWER WL_CHANSPEC_CTL_SB_LLL 170 #define WL_CHANSPEC_CTL_SB_UPPER WL_CHANSPEC_CTL_SB_LLU 171 172 #define WL_CHANSPEC_BW_MASK 0x3800 173 #define WL_CHANSPEC_BW_SHIFT 11 174 #define WL_CHANSPEC_BW_5 0x0000 175 #define WL_CHANSPEC_BW_10 0x0800 176 #define WL_CHANSPEC_BW_20 0x1000 177 #define WL_CHANSPEC_BW_40 0x1800 178 #define WL_CHANSPEC_BW_80 0x2000 179 #define WL_CHANSPEC_BW_160 0x2800 180 #define WL_CHANSPEC_BW_8080 0x3000 181 182 #define WL_CHANSPEC_BAND_MASK 0xc000 183 #define WL_CHANSPEC_BAND_SHIFT 14 184 #define WL_CHANSPEC_BAND_2G 0x0000 185 #define WL_CHANSPEC_BAND_3G 0x4000 186 #define WL_CHANSPEC_BAND_4G 0x8000 187 #define WL_CHANSPEC_BAND_5G 0xc000 188 #define INVCHANSPEC 255 189 190 /* channel defines */ 191 #define LOWER_20_SB(channel) (((channel) > CH_10MHZ_APART) ? \ 192 ((channel) - CH_10MHZ_APART) : 0) 193 #define UPPER_20_SB(channel) (((channel) < (MAXCHANNEL - CH_10MHZ_APART)) ? \ 194 ((channel) + CH_10MHZ_APART) : 0) 195 196 #define LL_20_SB(channel) (((channel) > 3 * CH_10MHZ_APART) ? ((channel) - 3 * CH_10MHZ_APART) : 0) 197 #define UU_20_SB(channel) (((channel) < (MAXCHANNEL - 3 * CH_10MHZ_APART)) ? \ 198 ((channel) + 3 * CH_10MHZ_APART) : 0) 199 #define LU_20_SB(channel) LOWER_20_SB(channel) 200 #define UL_20_SB(channel) UPPER_20_SB(channel) 201 202 #define LOWER_40_SB(channel) ((channel) - CH_20MHZ_APART) 203 #define UPPER_40_SB(channel) ((channel) + CH_20MHZ_APART) 204 #define CHSPEC_WLCBANDUNIT(chspec) (CHSPEC_IS5G(chspec) ? BAND_5G_INDEX : BAND_2G_INDEX) 205 #define CH20MHZ_CHSPEC(channel) (chanspec_t)((chanspec_t)(channel) | WL_CHANSPEC_BW_20 | \ 206 (((channel) <= CH_MAX_2G_CHANNEL) ? \ 207 WL_CHANSPEC_BAND_2G : WL_CHANSPEC_BAND_5G)) 208 #define NEXT_20MHZ_CHAN(channel) (((channel) < (MAXCHANNEL - CH_20MHZ_APART)) ? \ 209 ((channel) + CH_20MHZ_APART) : 0) 210 #define CH40MHZ_CHSPEC(channel, ctlsb) (chanspec_t) \ 211 ((channel) | (ctlsb) | WL_CHANSPEC_BW_40 | \ 212 ((channel) <= CH_MAX_2G_CHANNEL ? WL_CHANSPEC_BAND_2G : \ 213 WL_CHANSPEC_BAND_5G)) 214 #define CH80MHZ_CHSPEC(channel, ctlsb) (chanspec_t) \ 215 ((channel) | (ctlsb) | \ 216 WL_CHANSPEC_BW_80 | WL_CHANSPEC_BAND_5G) 217 #define CH160MHZ_CHSPEC(channel, ctlsb) (chanspec_t) \ 218 ((channel) | (ctlsb) | \ 219 WL_CHANSPEC_BW_160 | WL_CHANSPEC_BAND_5G) 220 221 /* simple MACROs to get different fields of chanspec */ 222 #define CHSPEC_CHANNEL(chspec) ((uint8)((chspec) & WL_CHANSPEC_CHAN_MASK)) 223 #define CHSPEC_CHAN1(chspec) ((chspec) & WL_CHANSPEC_CHAN1_MASK) 224 #define CHSPEC_CHAN2(chspec) ((chspec) & WL_CHANSPEC_CHAN2_MASK) 225 #define CHSPEC_BAND(chspec) ((chspec) & WL_CHANSPEC_BAND_MASK) 226 #define CHSPEC_CTL_SB(chspec) ((chspec) & WL_CHANSPEC_CTL_SB_MASK) 227 #define CHSPEC_BW(chspec) ((chspec) & WL_CHANSPEC_BW_MASK) 228 229 #ifdef WL11N_20MHZONLY 230 231 #define CHSPEC_IS10(chspec) 0 232 #define CHSPEC_IS20(chspec) 1 233 #ifndef CHSPEC_IS40 234 #define CHSPEC_IS40(chspec) 0 235 #endif 236 #ifndef CHSPEC_IS80 237 #define CHSPEC_IS80(chspec) 0 238 #endif 239 #ifndef CHSPEC_IS160 240 #define CHSPEC_IS160(chspec) 0 241 #endif 242 #ifndef CHSPEC_IS8080 243 #define CHSPEC_IS8080(chspec) 0 244 #endif 245 246 #else /* !WL11N_20MHZONLY */ 247 248 #define CHSPEC_IS10(chspec) (((chspec) & WL_CHANSPEC_BW_MASK) == WL_CHANSPEC_BW_10) 249 #define CHSPEC_IS20(chspec) (((chspec) & WL_CHANSPEC_BW_MASK) == WL_CHANSPEC_BW_20) 250 #ifndef CHSPEC_IS40 251 #define CHSPEC_IS40(chspec) (((chspec) & WL_CHANSPEC_BW_MASK) == WL_CHANSPEC_BW_40) 252 #endif 253 #ifndef CHSPEC_IS80 254 #define CHSPEC_IS80(chspec) (((chspec) & WL_CHANSPEC_BW_MASK) == WL_CHANSPEC_BW_80) 255 #endif 256 #ifndef CHSPEC_IS160 257 #define CHSPEC_IS160(chspec) (((chspec) & WL_CHANSPEC_BW_MASK) == WL_CHANSPEC_BW_160) 258 #endif 259 #ifndef CHSPEC_IS8080 260 #define CHSPEC_IS8080(chspec) (((chspec) & WL_CHANSPEC_BW_MASK) == WL_CHANSPEC_BW_8080) 261 #endif 262 263 #endif /* !WL11N_20MHZONLY */ 264 265 #define CHSPEC_IS5G(chspec) (((chspec) & WL_CHANSPEC_BAND_MASK) == WL_CHANSPEC_BAND_5G) 266 #define CHSPEC_IS2G(chspec) (((chspec) & WL_CHANSPEC_BAND_MASK) == WL_CHANSPEC_BAND_2G) 267 #define CHSPEC_SB_UPPER(chspec) \ 268 ((((chspec) & WL_CHANSPEC_CTL_SB_MASK) == WL_CHANSPEC_CTL_SB_UPPER) && \ 269 (((chspec) & WL_CHANSPEC_BW_MASK) == WL_CHANSPEC_BW_40)) 270 #define CHSPEC_SB_LOWER(chspec) \ 271 ((((chspec) & WL_CHANSPEC_CTL_SB_MASK) == WL_CHANSPEC_CTL_SB_LOWER) && \ 272 (((chspec) & WL_CHANSPEC_BW_MASK) == WL_CHANSPEC_BW_40)) 273 #define CHSPEC2WLC_BAND(chspec) (CHSPEC_IS5G(chspec) ? WLC_BAND_5G : WLC_BAND_2G) 274 275 /** 276 * Number of chars needed for wf_chspec_ntoa() destination character buffer. 277 */ 278 #define CHANSPEC_STR_LEN 20 279 280 281 /* Legacy Chanspec defines 282 * These are the defines for the previous format of the chanspec_t 283 */ 284 #define WL_LCHANSPEC_CHAN_MASK 0x00ff 285 #define WL_LCHANSPEC_CHAN_SHIFT 0 286 287 #define WL_LCHANSPEC_CTL_SB_MASK 0x0300 288 #define WL_LCHANSPEC_CTL_SB_SHIFT 8 289 #define WL_LCHANSPEC_CTL_SB_LOWER 0x0100 290 #define WL_LCHANSPEC_CTL_SB_UPPER 0x0200 291 #define WL_LCHANSPEC_CTL_SB_NONE 0x0300 292 293 #define WL_LCHANSPEC_BW_MASK 0x0C00 294 #define WL_LCHANSPEC_BW_SHIFT 10 295 #define WL_LCHANSPEC_BW_10 0x0400 296 #define WL_LCHANSPEC_BW_20 0x0800 297 #define WL_LCHANSPEC_BW_40 0x0C00 298 299 #define WL_LCHANSPEC_BAND_MASK 0xf000 300 #define WL_LCHANSPEC_BAND_SHIFT 12 301 #define WL_LCHANSPEC_BAND_5G 0x1000 302 #define WL_LCHANSPEC_BAND_2G 0x2000 303 304 #define LCHSPEC_CHANNEL(chspec) ((uint8)((chspec) & WL_LCHANSPEC_CHAN_MASK)) 305 #define LCHSPEC_BAND(chspec) ((chspec) & WL_LCHANSPEC_BAND_MASK) 306 #define LCHSPEC_CTL_SB(chspec) ((chspec) & WL_LCHANSPEC_CTL_SB_MASK) 307 #define LCHSPEC_BW(chspec) ((chspec) & WL_LCHANSPEC_BW_MASK) 308 #define LCHSPEC_IS10(chspec) (((chspec) & WL_LCHANSPEC_BW_MASK) == WL_LCHANSPEC_BW_10) 309 #define LCHSPEC_IS20(chspec) (((chspec) & WL_LCHANSPEC_BW_MASK) == WL_LCHANSPEC_BW_20) 310 #define LCHSPEC_IS40(chspec) (((chspec) & WL_LCHANSPEC_BW_MASK) == WL_LCHANSPEC_BW_40) 311 #define LCHSPEC_IS5G(chspec) (((chspec) & WL_LCHANSPEC_BAND_MASK) == WL_LCHANSPEC_BAND_5G) 312 #define LCHSPEC_IS2G(chspec) (((chspec) & WL_LCHANSPEC_BAND_MASK) == WL_LCHANSPEC_BAND_2G) 313 314 #define LCHSPEC_CREATE(chan, band, bw, sb) ((uint16)((chan) | (sb) | (bw) | (band))) 315 316 #define CH20MHZ_LCHSPEC(channel) \ 317 (chanspec_t)((chanspec_t)(channel) | WL_LCHANSPEC_BW_20 | \ 318 WL_LCHANSPEC_CTL_SB_NONE | (((channel) <= CH_MAX_2G_CHANNEL) ? \ 319 WL_LCHANSPEC_BAND_2G : WL_LCHANSPEC_BAND_5G)) 320 321 #endif /* D11AC_IOTYPES */ 322 323 /* 324 * WF_CHAN_FACTOR_* constants are used to calculate channel frequency 325 * given a channel number. 326 * chan_freq = chan_factor * 500Mhz + chan_number * 5 327 */ 328 329 /** 330 * Channel Factor for the starting frequence of 2.4 GHz channels. 331 * The value corresponds to 2407 MHz. 332 */ 333 #define WF_CHAN_FACTOR_2_4_G 4814 /* 2.4 GHz band, 2407 MHz */ 334 335 /** 336 * Channel Factor for the starting frequence of 5 GHz channels. 337 * The value corresponds to 5000 MHz. 338 */ 339 #define WF_CHAN_FACTOR_5_G 10000 /* 5 GHz band, 5000 MHz */ 340 341 /** 342 * Channel Factor for the starting frequence of 4.9 GHz channels. 343 * The value corresponds to 4000 MHz. 344 */ 345 #define WF_CHAN_FACTOR_4_G 8000 /* 4.9 GHz band for Japan */ 346 347 #define WLC_2G_25MHZ_OFFSET 5 /* 2.4GHz band channel offset */ 348 349 /** 350 * Convert chanspec to ascii string 351 * 352 * @param chspec chanspec format 353 * @param buf ascii string of chanspec 354 * 355 * @return pointer to buf with room for at least CHANSPEC_STR_LEN bytes 356 * 357 * @see CHANSPEC_STR_LEN 358 */ 359 extern char * wf_chspec_ntoa(chanspec_t chspec, char *buf); 360 361 /** 362 * Convert ascii string to chanspec 363 * 364 * @param a pointer to input string 365 * 366 * @return >= 0 if successful or 0 otherwise 367 */ 368 extern chanspec_t wf_chspec_aton(const char *a); 369 370 /** 371 * Verify the chanspec fields are valid. 372 * 373 * Verify the chanspec is using a legal set field values, i.e. that the chanspec 374 * specified a band, bw, ctl_sb and channel and that the combination could be 375 * legal given some set of circumstances. 376 * 377 * @param chanspec input chanspec to verify 378 * 379 * @return TRUE if the chanspec is malformed, FALSE if it looks good. 380 */ 381 extern bool wf_chspec_malformed(chanspec_t chanspec); 382 383 /** 384 * Verify the chanspec specifies a valid channel according to 802.11. 385 * 386 * @param chanspec input chanspec to verify 387 * 388 * @return TRUE if the chanspec is a valid 802.11 channel 389 */ 390 extern bool wf_chspec_valid(chanspec_t chanspec); 391 392 /** 393 * Return the primary (control) channel. 394 * 395 * This function returns the channel number of the primary 20MHz channel. For 396 * 20MHz channels this is just the channel number. For 40MHz or wider channels 397 * it is the primary 20MHz channel specified by the chanspec. 398 * 399 * @param chspec input chanspec 400 * 401 * @return Returns the channel number of the primary 20MHz channel 402 */ 403 extern uint8 wf_chspec_ctlchan(chanspec_t chspec); 404 405 /** 406 * Return the primary (control) chanspec. 407 * 408 * This function returns the chanspec of the primary 20MHz channel. For 20MHz 409 * channels this is just the chanspec. For 40MHz or wider channels it is the 410 * chanspec of the primary 20MHZ channel specified by the chanspec. 411 * 412 * @param chspec input chanspec 413 * 414 * @return Returns the chanspec of the primary 20MHz channel 415 */ 416 extern chanspec_t wf_chspec_ctlchspec(chanspec_t chspec); 417 418 /** 419 * Return a channel number corresponding to a frequency. 420 * 421 * This function returns the chanspec for the primary 40MHz of an 80MHz channel. 422 * The control sideband specifies the same 20MHz channel that the 80MHz channel is using 423 * as the primary 20MHz channel. 424 */ 425 extern chanspec_t wf_chspec_primary40_chspec(chanspec_t chspec); 426 427 /* 428 * Return the channel number for a given frequency and base frequency. 429 * The returned channel number is relative to the given base frequency. 430 * If the given base frequency is zero, a base frequency of 5 GHz is assumed for 431 * frequencies from 5 - 6 GHz, and 2.407 GHz is assumed for 2.4 - 2.5 GHz. 432 * 433 * Frequency is specified in MHz. 434 * The base frequency is specified as (start_factor * 500 kHz). 435 * Constants WF_CHAN_FACTOR_2_4_G, WF_CHAN_FACTOR_5_G are defined for 436 * 2.4 GHz and 5 GHz bands. 437 * 438 * The returned channel will be in the range [1, 14] in the 2.4 GHz band 439 * and [0, 200] otherwise. 440 * -1 is returned if the start_factor is WF_CHAN_FACTOR_2_4_G and the 441 * frequency is not a 2.4 GHz channel, or if the frequency is not and even 442 * multiple of 5 MHz from the base frequency to the base plus 1 GHz. 443 * 444 * Reference 802.11 REVma, section 17.3.8.3, and 802.11B section 18.4.6.2 445 * 446 * @param freq frequency in MHz 447 * @param start_factor base frequency in 500 kHz units, e.g. 10000 for 5 GHz 448 * 449 * @return Returns a channel number 450 * 451 * @see WF_CHAN_FACTOR_2_4_G 452 * @see WF_CHAN_FACTOR_5_G 453 */ 454 extern int wf_mhz2channel(uint freq, uint start_factor); 455 456 /** 457 * Return the center frequency in MHz of the given channel and base frequency. 458 * 459 * Return the center frequency in MHz of the given channel and base frequency. 460 * The channel number is interpreted relative to the given base frequency. 461 * 462 * The valid channel range is [1, 14] in the 2.4 GHz band and [0, 200] otherwise. 463 * The base frequency is specified as (start_factor * 500 kHz). 464 * Constants WF_CHAN_FACTOR_2_4_G, WF_CHAN_FACTOR_5_G are defined for 465 * 2.4 GHz and 5 GHz bands. 466 * The channel range of [1, 14] is only checked for a start_factor of 467 * WF_CHAN_FACTOR_2_4_G (4814). 468 * Odd start_factors produce channels on .5 MHz boundaries, in which case 469 * the answer is rounded down to an integral MHz. 470 * -1 is returned for an out of range channel. 471 * 472 * Reference 802.11 REVma, section 17.3.8.3, and 802.11B section 18.4.6.2 473 * 474 * @param channel input channel number 475 * @param start_factor base frequency in 500 kHz units, e.g. 10000 for 5 GHz 476 * 477 * @return Returns a frequency in MHz 478 * 479 * @see WF_CHAN_FACTOR_2_4_G 480 * @see WF_CHAN_FACTOR_5_G 481 */ 482 extern int wf_channel2mhz(uint channel, uint start_factor); 483 484 /** 485 * Convert ctl chan and bw to chanspec 486 * 487 * @param ctl_ch channel 488 * @param bw bandwidth 489 * 490 * @return > 0 if successful or 0 otherwise 491 * 492 */ 493 extern uint16 wf_channel2chspec(uint ctl_ch, uint bw); 494 495 extern uint wf_channel2freq(uint channel); 496 extern uint wf_freq2channel(uint freq); 497 498 499 #endif /* _bcmwifi_channels_h_ */ 500