1/* 2 * Copyright (c) 2010 Broadcom Corporation 3 * 4 * Permission to use, copy, modify, and/or distribute this software for any 5 * purpose with or without fee is hereby granted, provided that the above 6 * copyright notice and this permission notice appear in all copies. 7 * 8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 11 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION 13 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN 14 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 15 */ 16 17#include <net/mac80211.h> 18 19#include "types.h" 20#include "d11.h" 21#include "rate.h" 22#include "phy/phy_hal.h" 23#include "channel.h" 24#include "main.h" 25#include "stf.h" 26 27#define MIN_SPATIAL_EXPANSION 0 28#define MAX_SPATIAL_EXPANSION 1 29 30#define BRCMS_STF_SS_STBC_RX(wlc) (BRCMS_ISNPHY(wlc->band) && \ 31 NREV_GT(wlc->band->phyrev, 3) && NREV_LE(wlc->band->phyrev, 6)) 32 33#define NSTS_1 1 34#define NSTS_2 2 35#define NSTS_3 3 36#define NSTS_4 4 37 38static const u8 txcore_default[5] = { 39 (0), /* bitmap of the core enabled */ 40 (0x01), /* For Nsts = 1, enable core 1 */ 41 (0x03), /* For Nsts = 2, enable core 1 & 2 */ 42 (0x07), /* For Nsts = 3, enable core 1, 2 & 3 */ 43 (0x0f) /* For Nsts = 4, enable all cores */ 44}; 45 46static void brcms_c_stf_stbc_rx_ht_update(struct brcms_c_info *wlc, int val) 47{ 48 /* MIMOPHYs rev3-6 cannot receive STBC with only one rx core active */ 49 if (BRCMS_STF_SS_STBC_RX(wlc)) { 50 if ((wlc->stf->rxstreams == 1) && (val != HT_CAP_RX_STBC_NO)) 51 return; 52 } 53 54 if (wlc->pub->up) { 55 brcms_c_update_beacon(wlc); 56 brcms_c_update_probe_resp(wlc, true); 57 } 58} 59 60/* 61 * every WLC_TEMPSENSE_PERIOD seconds temperature check to decide whether to 62 * turn on/off txchain. 63 */ 64void brcms_c_tempsense_upd(struct brcms_c_info *wlc) 65{ 66 struct brcms_phy_pub *pi = wlc->band->pi; 67 uint active_chains, txchain; 68 69 /* Check if the chip is too hot. Disable one Tx chain, if it is */ 70 /* high 4 bits are for Rx chain, low 4 bits are for Tx chain */ 71 active_chains = wlc_phy_stf_chain_active_get(pi); 72 txchain = active_chains & 0xf; 73 74 if (wlc->stf->txchain == wlc->stf->hw_txchain) { 75 if (txchain && (txchain < wlc->stf->hw_txchain)) 76 /* turn off 1 tx chain */ 77 brcms_c_stf_txchain_set(wlc, txchain, true); 78 } else if (wlc->stf->txchain < wlc->stf->hw_txchain) { 79 if (txchain == wlc->stf->hw_txchain) 80 /* turn back on txchain */ 81 brcms_c_stf_txchain_set(wlc, txchain, true); 82 } 83} 84 85void 86brcms_c_stf_ss_algo_channel_get(struct brcms_c_info *wlc, u16 *ss_algo_channel, 87 u16 chanspec) 88{ 89 struct tx_power power; 90 u8 siso_mcs_id, cdd_mcs_id, stbc_mcs_id; 91 92 /* Clear previous settings */ 93 *ss_algo_channel = 0; 94 95 if (!wlc->pub->up) { 96 *ss_algo_channel = (u16) -1; 97 return; 98 } 99 100 wlc_phy_txpower_get_current(wlc->band->pi, &power, 101 CHSPEC_CHANNEL(chanspec)); 102 103 siso_mcs_id = (CHSPEC_IS40(chanspec)) ? 104 WL_TX_POWER_MCS40_SISO_FIRST : WL_TX_POWER_MCS20_SISO_FIRST; 105 cdd_mcs_id = (CHSPEC_IS40(chanspec)) ? 106 WL_TX_POWER_MCS40_CDD_FIRST : WL_TX_POWER_MCS20_CDD_FIRST; 107 stbc_mcs_id = (CHSPEC_IS40(chanspec)) ? 108 WL_TX_POWER_MCS40_STBC_FIRST : WL_TX_POWER_MCS20_STBC_FIRST; 109 110 /* criteria to choose stf mode */ 111 112 /* 113 * the "+3dbm (12 0.25db units)" is to account for the fact that with 114 * CDD, tx occurs on both chains 115 */ 116 if (power.target[siso_mcs_id] > (power.target[cdd_mcs_id] + 12)) 117 setbit(ss_algo_channel, PHY_TXC1_MODE_SISO); 118 else 119 setbit(ss_algo_channel, PHY_TXC1_MODE_CDD); 120 121 /* 122 * STBC is ORed into to algo channel as STBC requires per-packet SCB 123 * capability check so cannot be default mode of operation. One of 124 * SISO, CDD have to be set 125 */ 126 if (power.target[siso_mcs_id] <= (power.target[stbc_mcs_id] + 12)) 127 setbit(ss_algo_channel, PHY_TXC1_MODE_STBC); 128} 129 130static bool brcms_c_stf_stbc_tx_set(struct brcms_c_info *wlc, s32 int_val) 131{ 132 if ((int_val != AUTO) && (int_val != OFF) && (int_val != ON)) 133 return false; 134 135 if ((int_val == ON) && (wlc->stf->txstreams == 1)) 136 return false; 137 138 wlc->bandstate[BAND_2G_INDEX]->band_stf_stbc_tx = (s8) int_val; 139 wlc->bandstate[BAND_5G_INDEX]->band_stf_stbc_tx = (s8) int_val; 140 141 return true; 142} 143 144bool brcms_c_stf_stbc_rx_set(struct brcms_c_info *wlc, s32 int_val) 145{ 146 if ((int_val != HT_CAP_RX_STBC_NO) 147 && (int_val != HT_CAP_RX_STBC_ONE_STREAM)) 148 return false; 149 150 if (BRCMS_STF_SS_STBC_RX(wlc)) { 151 if ((int_val != HT_CAP_RX_STBC_NO) 152 && (wlc->stf->rxstreams == 1)) 153 return false; 154 } 155 156 brcms_c_stf_stbc_rx_ht_update(wlc, int_val); 157 return true; 158} 159 160static int brcms_c_stf_txcore_set(struct brcms_c_info *wlc, u8 Nsts, 161 u8 core_mask) 162{ 163 BCMMSG(wlc->wiphy, "wl%d: Nsts %d core_mask %x\n", 164 wlc->pub->unit, Nsts, core_mask); 165 166 if (hweight8(core_mask) > wlc->stf->txstreams) 167 core_mask = 0; 168 169 if ((hweight8(core_mask) == wlc->stf->txstreams) && 170 ((core_mask & ~wlc->stf->txchain) 171 || !(core_mask & wlc->stf->txchain))) 172 core_mask = wlc->stf->txchain; 173 174 wlc->stf->txcore[Nsts] = core_mask; 175 /* Nsts = 1..4, txcore index = 1..4 */ 176 if (Nsts == 1) { 177 /* Needs to update beacon and ucode generated response 178 * frames when 1 stream core map changed 179 */ 180 wlc->stf->phytxant = core_mask << PHY_TXC_ANT_SHIFT; 181 brcms_b_txant_set(wlc->hw, wlc->stf->phytxant); 182 if (wlc->clk) { 183 brcms_c_suspend_mac_and_wait(wlc); 184 brcms_c_beacon_phytxctl_txant_upd(wlc, wlc->bcn_rspec); 185 brcms_c_enable_mac(wlc); 186 } 187 } 188 189 return 0; 190} 191 192static int brcms_c_stf_spatial_policy_set(struct brcms_c_info *wlc, int val) 193{ 194 int i; 195 u8 core_mask = 0; 196 197 BCMMSG(wlc->wiphy, "wl%d: val %x\n", wlc->pub->unit, val); 198 199 wlc->stf->spatial_policy = (s8) val; 200 for (i = 1; i <= MAX_STREAMS_SUPPORTED; i++) { 201 core_mask = (val == MAX_SPATIAL_EXPANSION) ? 202 wlc->stf->txchain : txcore_default[i]; 203 brcms_c_stf_txcore_set(wlc, (u8) i, core_mask); 204 } 205 return 0; 206} 207 208/* 209 * Centralized txant update function. call it whenever wlc->stf->txant and/or 210 * wlc->stf->txchain change. 211 * 212 * Antennas are controlled by ucode indirectly, which drives PHY or GPIO to 213 * achieve various tx/rx antenna selection schemes 214 * 215 * legacy phy, bit 6 and bit 7 means antenna 0 and 1 respectively, bit6+bit7 216 * means auto(last rx). 217 * for NREV<3, bit 6 and bit 7 means antenna 0 and 1 respectively, bit6+bit7 218 * means last rx and do tx-antenna selection for SISO transmissions 219 * for NREV=3, bit 6 and bit _8_ means antenna 0 and 1 respectively, bit6+bit7 220 * means last rx and do tx-antenna selection for SISO transmissions 221 * for NREV>=7, bit 6 and bit 7 mean antenna 0 and 1 respectively, nit6+bit7 222 * means both cores active 223*/ 224static void _brcms_c_stf_phy_txant_upd(struct brcms_c_info *wlc) 225{ 226 s8 txant; 227 228 txant = (s8) wlc->stf->txant; 229 if (BRCMS_PHY_11N_CAP(wlc->band)) { 230 if (txant == ANT_TX_FORCE_0) { 231 wlc->stf->phytxant = PHY_TXC_ANT_0; 232 } else if (txant == ANT_TX_FORCE_1) { 233 wlc->stf->phytxant = PHY_TXC_ANT_1; 234 235 if (BRCMS_ISNPHY(wlc->band) && 236 NREV_GE(wlc->band->phyrev, 3) 237 && NREV_LT(wlc->band->phyrev, 7)) 238 wlc->stf->phytxant = PHY_TXC_ANT_2; 239 } else { 240 if (BRCMS_ISLCNPHY(wlc->band) || 241 BRCMS_ISSSLPNPHY(wlc->band)) 242 wlc->stf->phytxant = PHY_TXC_LCNPHY_ANT_LAST; 243 else { 244 /* catch out of sync wlc->stf->txcore */ 245 WARN_ON(wlc->stf->txchain <= 0); 246 wlc->stf->phytxant = 247 wlc->stf->txchain << PHY_TXC_ANT_SHIFT; 248 } 249 } 250 } else { 251 if (txant == ANT_TX_FORCE_0) 252 wlc->stf->phytxant = PHY_TXC_OLD_ANT_0; 253 else if (txant == ANT_TX_FORCE_1) 254 wlc->stf->phytxant = PHY_TXC_OLD_ANT_1; 255 else 256 wlc->stf->phytxant = PHY_TXC_OLD_ANT_LAST; 257 } 258 259 brcms_b_txant_set(wlc->hw, wlc->stf->phytxant); 260} 261 262int brcms_c_stf_txchain_set(struct brcms_c_info *wlc, s32 int_val, bool force) 263{ 264 u8 txchain = (u8) int_val; 265 u8 txstreams; 266 uint i; 267 268 if (wlc->stf->txchain == txchain) 269 return 0; 270 271 if ((txchain & ~wlc->stf->hw_txchain) 272 || !(txchain & wlc->stf->hw_txchain)) 273 return -EINVAL; 274 275 /* 276 * if nrate override is configured to be non-SISO STF mode, reject 277 * reducing txchain to 1 278 */ 279 txstreams = (u8) hweight8(txchain); 280 if (txstreams > MAX_STREAMS_SUPPORTED) 281 return -EINVAL; 282 283 wlc->stf->txchain = txchain; 284 wlc->stf->txstreams = txstreams; 285 brcms_c_stf_stbc_tx_set(wlc, wlc->band->band_stf_stbc_tx); 286 brcms_c_stf_ss_update(wlc, wlc->bandstate[BAND_2G_INDEX]); 287 brcms_c_stf_ss_update(wlc, wlc->bandstate[BAND_5G_INDEX]); 288 wlc->stf->txant = 289 (wlc->stf->txstreams == 1) ? ANT_TX_FORCE_0 : ANT_TX_DEF; 290 _brcms_c_stf_phy_txant_upd(wlc); 291 292 wlc_phy_stf_chain_set(wlc->band->pi, wlc->stf->txchain, 293 wlc->stf->rxchain); 294 295 for (i = 1; i <= MAX_STREAMS_SUPPORTED; i++) 296 brcms_c_stf_txcore_set(wlc, (u8) i, txcore_default[i]); 297 298 return 0; 299} 300 301/* 302 * update wlc->stf->ss_opmode which represents the operational stf_ss mode 303 * we're using 304 */ 305int brcms_c_stf_ss_update(struct brcms_c_info *wlc, struct brcms_band *band) 306{ 307 int ret_code = 0; 308 u8 prev_stf_ss; 309 u8 upd_stf_ss; 310 311 prev_stf_ss = wlc->stf->ss_opmode; 312 313 /* 314 * NOTE: opmode can only be SISO or CDD as STBC is decided on a 315 * per-packet basis 316 */ 317 if (BRCMS_STBC_CAP_PHY(wlc) && 318 wlc->stf->ss_algosel_auto 319 && (wlc->stf->ss_algo_channel != (u16) -1)) { 320 upd_stf_ss = (wlc->stf->txstreams == 1 || 321 isset(&wlc->stf->ss_algo_channel, 322 PHY_TXC1_MODE_SISO)) ? 323 PHY_TXC1_MODE_SISO : PHY_TXC1_MODE_CDD; 324 } else { 325 if (wlc->band != band) 326 return ret_code; 327 upd_stf_ss = (wlc->stf->txstreams == 1) ? 328 PHY_TXC1_MODE_SISO : band->band_stf_ss_mode; 329 } 330 if (prev_stf_ss != upd_stf_ss) { 331 wlc->stf->ss_opmode = upd_stf_ss; 332 brcms_b_band_stf_ss_set(wlc->hw, upd_stf_ss); 333 } 334 335 return ret_code; 336} 337 338int brcms_c_stf_attach(struct brcms_c_info *wlc) 339{ 340 wlc->bandstate[BAND_2G_INDEX]->band_stf_ss_mode = PHY_TXC1_MODE_SISO; 341 wlc->bandstate[BAND_5G_INDEX]->band_stf_ss_mode = PHY_TXC1_MODE_CDD; 342 343 if (BRCMS_ISNPHY(wlc->band) && 344 (wlc_phy_txpower_hw_ctrl_get(wlc->band->pi) != PHY_TPC_HW_ON)) 345 wlc->bandstate[BAND_2G_INDEX]->band_stf_ss_mode = 346 PHY_TXC1_MODE_CDD; 347 brcms_c_stf_ss_update(wlc, wlc->bandstate[BAND_2G_INDEX]); 348 brcms_c_stf_ss_update(wlc, wlc->bandstate[BAND_5G_INDEX]); 349 350 brcms_c_stf_stbc_rx_ht_update(wlc, HT_CAP_RX_STBC_NO); 351 wlc->bandstate[BAND_2G_INDEX]->band_stf_stbc_tx = OFF; 352 wlc->bandstate[BAND_5G_INDEX]->band_stf_stbc_tx = OFF; 353 354 if (BRCMS_STBC_CAP_PHY(wlc)) { 355 wlc->stf->ss_algosel_auto = true; 356 /* Init the default value */ 357 wlc->stf->ss_algo_channel = (u16) -1; 358 } 359 return 0; 360} 361 362void brcms_c_stf_detach(struct brcms_c_info *wlc) 363{ 364} 365 366void brcms_c_stf_phy_txant_upd(struct brcms_c_info *wlc) 367{ 368 _brcms_c_stf_phy_txant_upd(wlc); 369} 370 371void brcms_c_stf_phy_chain_calc(struct brcms_c_info *wlc) 372{ 373 /* get available rx/tx chains */ 374 wlc->stf->hw_txchain = (u8) getintvar(wlc->hw->sih, BRCMS_SROM_TXCHAIN); 375 wlc->stf->hw_rxchain = (u8) getintvar(wlc->hw->sih, BRCMS_SROM_RXCHAIN); 376 377 /* these parameter are intended to be used for all PHY types */ 378 if (wlc->stf->hw_txchain == 0 || wlc->stf->hw_txchain == 0xf) { 379 if (BRCMS_ISNPHY(wlc->band)) 380 wlc->stf->hw_txchain = TXCHAIN_DEF_NPHY; 381 else 382 wlc->stf->hw_txchain = TXCHAIN_DEF; 383 } 384 385 wlc->stf->txchain = wlc->stf->hw_txchain; 386 wlc->stf->txstreams = (u8) hweight8(wlc->stf->hw_txchain); 387 388 if (wlc->stf->hw_rxchain == 0 || wlc->stf->hw_rxchain == 0xf) { 389 if (BRCMS_ISNPHY(wlc->band)) 390 wlc->stf->hw_rxchain = RXCHAIN_DEF_NPHY; 391 else 392 wlc->stf->hw_rxchain = RXCHAIN_DEF; 393 } 394 395 wlc->stf->rxchain = wlc->stf->hw_rxchain; 396 wlc->stf->rxstreams = (u8) hweight8(wlc->stf->hw_rxchain); 397 398 /* initialize the txcore table */ 399 memcpy(wlc->stf->txcore, txcore_default, sizeof(wlc->stf->txcore)); 400 401 /* default spatial_policy */ 402 wlc->stf->spatial_policy = MIN_SPATIAL_EXPANSION; 403 brcms_c_stf_spatial_policy_set(wlc, MIN_SPATIAL_EXPANSION); 404} 405 406static u16 _brcms_c_stf_phytxchain_sel(struct brcms_c_info *wlc, 407 u32 rspec) 408{ 409 u16 phytxant = wlc->stf->phytxant; 410 411 if (rspec_stf(rspec) != PHY_TXC1_MODE_SISO) 412 phytxant = wlc->stf->txchain << PHY_TXC_ANT_SHIFT; 413 else if (wlc->stf->txant == ANT_TX_DEF) 414 phytxant = wlc->stf->txchain << PHY_TXC_ANT_SHIFT; 415 phytxant &= PHY_TXC_ANT_MASK; 416 return phytxant; 417} 418 419u16 brcms_c_stf_phytxchain_sel(struct brcms_c_info *wlc, u32 rspec) 420{ 421 return _brcms_c_stf_phytxchain_sel(wlc, rspec); 422} 423 424u16 brcms_c_stf_d11hdrs_phyctl_txant(struct brcms_c_info *wlc, u32 rspec) 425{ 426 u16 phytxant = wlc->stf->phytxant; 427 u16 mask = PHY_TXC_ANT_MASK; 428 429 /* for non-siso rates or default setting, use the available chains */ 430 if (BRCMS_ISNPHY(wlc->band)) { 431 phytxant = _brcms_c_stf_phytxchain_sel(wlc, rspec); 432 mask = PHY_TXC_HTANT_MASK; 433 } 434 phytxant |= phytxant & mask; 435 return phytxant; 436} 437