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 #include "debug.h" 27 28 #define MIN_SPATIAL_EXPANSION 0 29 #define MAX_SPATIAL_EXPANSION 1 30 31 #define BRCMS_STF_SS_STBC_RX(wlc) (BRCMS_ISNPHY(wlc->band) && \ 32 NREV_GT(wlc->band->phyrev, 3) && NREV_LE(wlc->band->phyrev, 6)) 33 34 #define NSTS_1 1 35 #define NSTS_2 2 36 #define NSTS_3 3 37 #define NSTS_4 4 38 39 static const u8 txcore_default[5] = { 40 (0), /* bitmap of the core enabled */ 41 (0x01), /* For Nsts = 1, enable core 1 */ 42 (0x03), /* For Nsts = 2, enable core 1 & 2 */ 43 (0x07), /* For Nsts = 3, enable core 1, 2 & 3 */ 44 (0x0f) /* For Nsts = 4, enable all cores */ 45 }; 46 47 static void brcms_c_stf_stbc_rx_ht_update(struct brcms_c_info *wlc, int val) 48 { 49 /* MIMOPHYs rev3-6 cannot receive STBC with only one rx core active */ 50 if (BRCMS_STF_SS_STBC_RX(wlc)) { 51 if ((wlc->stf->rxstreams == 1) && (val != HT_CAP_RX_STBC_NO)) 52 return; 53 } 54 55 if (wlc->pub->up) { 56 brcms_c_update_beacon(wlc); 57 brcms_c_update_probe_resp(wlc, true); 58 } 59 } 60 61 /* 62 * every WLC_TEMPSENSE_PERIOD seconds temperature check to decide whether to 63 * turn on/off txchain. 64 */ 65 void brcms_c_tempsense_upd(struct brcms_c_info *wlc) 66 { 67 struct brcms_phy_pub *pi = wlc->band->pi; 68 uint active_chains, txchain; 69 70 /* Check if the chip is too hot. Disable one Tx chain, if it is */ 71 /* high 4 bits are for Rx chain, low 4 bits are for Tx chain */ 72 active_chains = wlc_phy_stf_chain_active_get(pi); 73 txchain = active_chains & 0xf; 74 75 if (wlc->stf->txchain == wlc->stf->hw_txchain) { 76 if (txchain && (txchain < wlc->stf->hw_txchain)) 77 /* turn off 1 tx chain */ 78 brcms_c_stf_txchain_set(wlc, txchain, true); 79 } else if (wlc->stf->txchain < wlc->stf->hw_txchain) { 80 if (txchain == wlc->stf->hw_txchain) 81 /* turn back on txchain */ 82 brcms_c_stf_txchain_set(wlc, txchain, true); 83 } 84 } 85 86 void 87 brcms_c_stf_ss_algo_channel_get(struct brcms_c_info *wlc, u16 *ss_algo_channel, 88 u16 chanspec) 89 { 90 struct tx_power power = { }; 91 u8 siso_mcs_id, cdd_mcs_id, stbc_mcs_id; 92 93 /* Clear previous settings */ 94 *ss_algo_channel = 0; 95 96 if (!wlc->pub->up) { 97 *ss_algo_channel = (u16) -1; 98 return; 99 } 100 101 wlc_phy_txpower_get_current(wlc->band->pi, &power, 102 CHSPEC_CHANNEL(chanspec)); 103 104 siso_mcs_id = (CHSPEC_IS40(chanspec)) ? 105 WL_TX_POWER_MCS40_SISO_FIRST : WL_TX_POWER_MCS20_SISO_FIRST; 106 cdd_mcs_id = (CHSPEC_IS40(chanspec)) ? 107 WL_TX_POWER_MCS40_CDD_FIRST : WL_TX_POWER_MCS20_CDD_FIRST; 108 stbc_mcs_id = (CHSPEC_IS40(chanspec)) ? 109 WL_TX_POWER_MCS40_STBC_FIRST : WL_TX_POWER_MCS20_STBC_FIRST; 110 111 /* criteria to choose stf mode */ 112 113 /* 114 * the "+3dbm (12 0.25db units)" is to account for the fact that with 115 * CDD, tx occurs on both chains 116 */ 117 if (power.target[siso_mcs_id] > (power.target[cdd_mcs_id] + 12)) 118 setbit(ss_algo_channel, PHY_TXC1_MODE_SISO); 119 else 120 setbit(ss_algo_channel, PHY_TXC1_MODE_CDD); 121 122 /* 123 * STBC is ORed into to algo channel as STBC requires per-packet SCB 124 * capability check so cannot be default mode of operation. One of 125 * SISO, CDD have to be set 126 */ 127 if (power.target[siso_mcs_id] <= (power.target[stbc_mcs_id] + 12)) 128 setbit(ss_algo_channel, PHY_TXC1_MODE_STBC); 129 } 130 131 static bool brcms_c_stf_stbc_tx_set(struct brcms_c_info *wlc, s32 int_val) 132 { 133 if ((int_val != AUTO) && (int_val != OFF) && (int_val != ON)) 134 return false; 135 136 if ((int_val == ON) && (wlc->stf->txstreams == 1)) 137 return false; 138 139 wlc->bandstate[BAND_2G_INDEX]->band_stf_stbc_tx = (s8) int_val; 140 wlc->bandstate[BAND_5G_INDEX]->band_stf_stbc_tx = (s8) int_val; 141 142 return true; 143 } 144 145 bool brcms_c_stf_stbc_rx_set(struct brcms_c_info *wlc, s32 int_val) 146 { 147 if ((int_val != HT_CAP_RX_STBC_NO) 148 && (int_val != HT_CAP_RX_STBC_ONE_STREAM)) 149 return false; 150 151 if (BRCMS_STF_SS_STBC_RX(wlc)) { 152 if ((int_val != HT_CAP_RX_STBC_NO) 153 && (wlc->stf->rxstreams == 1)) 154 return false; 155 } 156 157 brcms_c_stf_stbc_rx_ht_update(wlc, int_val); 158 return true; 159 } 160 161 static int brcms_c_stf_txcore_set(struct brcms_c_info *wlc, u8 Nsts, 162 u8 core_mask) 163 { 164 brcms_dbg_ht(wlc->hw->d11core, "wl%d: Nsts %d core_mask %x\n", 165 wlc->pub->unit, Nsts, core_mask); 166 167 if (hweight8(core_mask) > wlc->stf->txstreams) 168 core_mask = 0; 169 170 if ((hweight8(core_mask) == wlc->stf->txstreams) && 171 ((core_mask & ~wlc->stf->txchain) 172 || !(core_mask & wlc->stf->txchain))) 173 core_mask = wlc->stf->txchain; 174 175 wlc->stf->txcore[Nsts] = core_mask; 176 /* Nsts = 1..4, txcore index = 1..4 */ 177 if (Nsts == 1) { 178 /* Needs to update beacon and ucode generated response 179 * frames when 1 stream core map changed 180 */ 181 wlc->stf->phytxant = core_mask << PHY_TXC_ANT_SHIFT; 182 brcms_b_txant_set(wlc->hw, wlc->stf->phytxant); 183 if (wlc->clk) { 184 brcms_c_suspend_mac_and_wait(wlc); 185 brcms_c_beacon_phytxctl_txant_upd(wlc, wlc->bcn_rspec); 186 brcms_c_enable_mac(wlc); 187 } 188 } 189 190 return 0; 191 } 192 193 static int brcms_c_stf_spatial_policy_set(struct brcms_c_info *wlc, int val) 194 { 195 int i; 196 u8 core_mask = 0; 197 198 brcms_dbg_ht(wlc->hw->d11core, "wl%d: val %x\n", wlc->pub->unit, 199 val); 200 201 wlc->stf->spatial_policy = (s8) val; 202 for (i = 1; i <= MAX_STREAMS_SUPPORTED; i++) { 203 core_mask = (val == MAX_SPATIAL_EXPANSION) ? 204 wlc->stf->txchain : txcore_default[i]; 205 brcms_c_stf_txcore_set(wlc, (u8) i, core_mask); 206 } 207 return 0; 208 } 209 210 /* 211 * Centralized txant update function. call it whenever wlc->stf->txant and/or 212 * wlc->stf->txchain change. 213 * 214 * Antennas are controlled by ucode indirectly, which drives PHY or GPIO to 215 * achieve various tx/rx antenna selection schemes 216 * 217 * legacy phy, bit 6 and bit 7 means antenna 0 and 1 respectively, bit6+bit7 218 * means auto(last rx). 219 * for NREV<3, bit 6 and bit 7 means antenna 0 and 1 respectively, bit6+bit7 220 * means last rx and do tx-antenna selection for SISO transmissions 221 * for NREV=3, bit 6 and bit _8_ means antenna 0 and 1 respectively, bit6+bit7 222 * means last rx and do tx-antenna selection for SISO transmissions 223 * for NREV>=7, bit 6 and bit 7 mean antenna 0 and 1 respectively, nit6+bit7 224 * means both cores active 225 */ 226 static void _brcms_c_stf_phy_txant_upd(struct brcms_c_info *wlc) 227 { 228 s8 txant; 229 230 txant = (s8) wlc->stf->txant; 231 if (BRCMS_PHY_11N_CAP(wlc->band)) { 232 if (txant == ANT_TX_FORCE_0) { 233 wlc->stf->phytxant = PHY_TXC_ANT_0; 234 } else if (txant == ANT_TX_FORCE_1) { 235 wlc->stf->phytxant = PHY_TXC_ANT_1; 236 237 if (BRCMS_ISNPHY(wlc->band) && 238 NREV_GE(wlc->band->phyrev, 3) 239 && NREV_LT(wlc->band->phyrev, 7)) 240 wlc->stf->phytxant = PHY_TXC_ANT_2; 241 } else { 242 if (BRCMS_ISLCNPHY(wlc->band) || 243 BRCMS_ISSSLPNPHY(wlc->band)) 244 wlc->stf->phytxant = PHY_TXC_LCNPHY_ANT_LAST; 245 else { 246 /* catch out of sync wlc->stf->txcore */ 247 WARN_ON(wlc->stf->txchain <= 0); 248 wlc->stf->phytxant = 249 wlc->stf->txchain << PHY_TXC_ANT_SHIFT; 250 } 251 } 252 } else { 253 if (txant == ANT_TX_FORCE_0) 254 wlc->stf->phytxant = PHY_TXC_OLD_ANT_0; 255 else if (txant == ANT_TX_FORCE_1) 256 wlc->stf->phytxant = PHY_TXC_OLD_ANT_1; 257 else 258 wlc->stf->phytxant = PHY_TXC_OLD_ANT_LAST; 259 } 260 261 brcms_b_txant_set(wlc->hw, wlc->stf->phytxant); 262 } 263 264 int brcms_c_stf_txchain_set(struct brcms_c_info *wlc, s32 int_val, bool force) 265 { 266 u8 txchain = (u8) int_val; 267 u8 txstreams; 268 uint i; 269 270 if (wlc->stf->txchain == txchain) 271 return 0; 272 273 if ((txchain & ~wlc->stf->hw_txchain) 274 || !(txchain & wlc->stf->hw_txchain)) 275 return -EINVAL; 276 277 /* 278 * if nrate override is configured to be non-SISO STF mode, reject 279 * reducing txchain to 1 280 */ 281 txstreams = (u8) hweight8(txchain); 282 if (txstreams > MAX_STREAMS_SUPPORTED) 283 return -EINVAL; 284 285 wlc->stf->txchain = txchain; 286 wlc->stf->txstreams = txstreams; 287 brcms_c_stf_stbc_tx_set(wlc, wlc->band->band_stf_stbc_tx); 288 brcms_c_stf_ss_update(wlc, wlc->bandstate[BAND_2G_INDEX]); 289 brcms_c_stf_ss_update(wlc, wlc->bandstate[BAND_5G_INDEX]); 290 wlc->stf->txant = 291 (wlc->stf->txstreams == 1) ? ANT_TX_FORCE_0 : ANT_TX_DEF; 292 _brcms_c_stf_phy_txant_upd(wlc); 293 294 wlc_phy_stf_chain_set(wlc->band->pi, wlc->stf->txchain, 295 wlc->stf->rxchain); 296 297 for (i = 1; i <= MAX_STREAMS_SUPPORTED; i++) 298 brcms_c_stf_txcore_set(wlc, (u8) i, txcore_default[i]); 299 300 return 0; 301 } 302 303 /* 304 * update wlc->stf->ss_opmode which represents the operational stf_ss mode 305 * we're using 306 */ 307 void brcms_c_stf_ss_update(struct brcms_c_info *wlc, struct brcms_band *band) 308 { 309 u8 prev_stf_ss; 310 u8 upd_stf_ss; 311 312 prev_stf_ss = wlc->stf->ss_opmode; 313 314 /* 315 * NOTE: opmode can only be SISO or CDD as STBC is decided on a 316 * per-packet basis 317 */ 318 if (BRCMS_STBC_CAP_PHY(wlc) && 319 wlc->stf->ss_algosel_auto 320 && (wlc->stf->ss_algo_channel != (u16) -1)) { 321 upd_stf_ss = (wlc->stf->txstreams == 1 || 322 isset(&wlc->stf->ss_algo_channel, 323 PHY_TXC1_MODE_SISO)) ? 324 PHY_TXC1_MODE_SISO : PHY_TXC1_MODE_CDD; 325 } else { 326 if (wlc->band != band) 327 return; 328 upd_stf_ss = (wlc->stf->txstreams == 1) ? 329 PHY_TXC1_MODE_SISO : band->band_stf_ss_mode; 330 } 331 if (prev_stf_ss != upd_stf_ss) { 332 wlc->stf->ss_opmode = upd_stf_ss; 333 brcms_b_band_stf_ss_set(wlc->hw, upd_stf_ss); 334 } 335 } 336 337 int brcms_c_stf_attach(struct brcms_c_info *wlc) 338 { 339 wlc->bandstate[BAND_2G_INDEX]->band_stf_ss_mode = PHY_TXC1_MODE_SISO; 340 wlc->bandstate[BAND_5G_INDEX]->band_stf_ss_mode = PHY_TXC1_MODE_CDD; 341 342 if (BRCMS_ISNPHY(wlc->band) && 343 (wlc_phy_txpower_hw_ctrl_get(wlc->band->pi) != PHY_TPC_HW_ON)) 344 wlc->bandstate[BAND_2G_INDEX]->band_stf_ss_mode = 345 PHY_TXC1_MODE_CDD; 346 brcms_c_stf_ss_update(wlc, wlc->bandstate[BAND_2G_INDEX]); 347 brcms_c_stf_ss_update(wlc, wlc->bandstate[BAND_5G_INDEX]); 348 349 brcms_c_stf_stbc_rx_ht_update(wlc, HT_CAP_RX_STBC_NO); 350 wlc->bandstate[BAND_2G_INDEX]->band_stf_stbc_tx = OFF; 351 wlc->bandstate[BAND_5G_INDEX]->band_stf_stbc_tx = OFF; 352 353 if (BRCMS_STBC_CAP_PHY(wlc)) { 354 wlc->stf->ss_algosel_auto = true; 355 /* Init the default value */ 356 wlc->stf->ss_algo_channel = (u16) -1; 357 } 358 return 0; 359 } 360 361 void brcms_c_stf_detach(struct brcms_c_info *wlc) 362 { 363 } 364 365 void brcms_c_stf_phy_txant_upd(struct brcms_c_info *wlc) 366 { 367 _brcms_c_stf_phy_txant_upd(wlc); 368 } 369 370 void brcms_c_stf_phy_chain_calc(struct brcms_c_info *wlc) 371 { 372 struct ssb_sprom *sprom = &wlc->hw->d11core->bus->sprom; 373 374 /* get available rx/tx chains */ 375 wlc->stf->hw_txchain = sprom->txchain; 376 wlc->stf->hw_rxchain = sprom->rxchain; 377 378 /* these parameter are intended to be used for all PHY types */ 379 if (wlc->stf->hw_txchain == 0 || wlc->stf->hw_txchain == 0xf) { 380 if (BRCMS_ISNPHY(wlc->band)) 381 wlc->stf->hw_txchain = TXCHAIN_DEF_NPHY; 382 else 383 wlc->stf->hw_txchain = TXCHAIN_DEF; 384 } 385 386 wlc->stf->txchain = wlc->stf->hw_txchain; 387 wlc->stf->txstreams = (u8) hweight8(wlc->stf->hw_txchain); 388 389 if (wlc->stf->hw_rxchain == 0 || wlc->stf->hw_rxchain == 0xf) { 390 if (BRCMS_ISNPHY(wlc->band)) 391 wlc->stf->hw_rxchain = RXCHAIN_DEF_NPHY; 392 else 393 wlc->stf->hw_rxchain = RXCHAIN_DEF; 394 } 395 396 wlc->stf->rxchain = wlc->stf->hw_rxchain; 397 wlc->stf->rxstreams = (u8) hweight8(wlc->stf->hw_rxchain); 398 399 /* initialize the txcore table */ 400 memcpy(wlc->stf->txcore, txcore_default, sizeof(wlc->stf->txcore)); 401 402 /* default spatial_policy */ 403 wlc->stf->spatial_policy = MIN_SPATIAL_EXPANSION; 404 brcms_c_stf_spatial_policy_set(wlc, MIN_SPATIAL_EXPANSION); 405 } 406 407 static u16 _brcms_c_stf_phytxchain_sel(struct brcms_c_info *wlc, 408 u32 rspec) 409 { 410 u16 phytxant = wlc->stf->phytxant; 411 412 if (rspec_stf(rspec) != PHY_TXC1_MODE_SISO) 413 phytxant = wlc->stf->txchain << PHY_TXC_ANT_SHIFT; 414 else if (wlc->stf->txant == ANT_TX_DEF) 415 phytxant = wlc->stf->txchain << PHY_TXC_ANT_SHIFT; 416 phytxant &= PHY_TXC_ANT_MASK; 417 return phytxant; 418 } 419 420 u16 brcms_c_stf_phytxchain_sel(struct brcms_c_info *wlc, u32 rspec) 421 { 422 return _brcms_c_stf_phytxchain_sel(wlc, rspec); 423 } 424 425 u16 brcms_c_stf_d11hdrs_phyctl_txant(struct brcms_c_info *wlc, u32 rspec) 426 { 427 u16 phytxant = wlc->stf->phytxant; 428 u16 mask = PHY_TXC_ANT_MASK; 429 430 /* for non-siso rates or default setting, use the available chains */ 431 if (BRCMS_ISNPHY(wlc->band)) { 432 phytxant = _brcms_c_stf_phytxchain_sel(wlc, rspec); 433 mask = PHY_TXC_HTANT_MASK; 434 } 435 phytxant |= phytxant & mask; 436 return phytxant; 437 } 438