drivers/staging/brcm80211/brcmsmac/wlc_stf.c

   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 <linux/kernel.h>
  18 #include <linux/module.h>
  19
  20 #include <proto/802.11.h>
  21 #include <proto/802.1d.h>
  22
  23 #include <bcmdefs.h>
  24 #include <osl.h>
  25 #include <bcmutils.h>
  26 #include <siutils.h>
  27 #include <wlioctl.h>
  28 #include <bcmwifi.h>
  29 #include <sbhnddma.h>
  30
  31 #include "wlc_types.h"
  32 #include "sbhndpio.h"
  33 #include "d11.h"
  34 #include "wl_dbg.h"
  35 #include "wlc_cfg.h"
  36 #include "wlc_rate.h"
  37 #include "wlc_scb.h"
  38 #include "wlc_pub.h"
  39 #include "wlc_key.h"
  40 #include "phy/wlc_phy_hal.h"
  41 #include "wlc_channel.h"
  42 #include "wlc_bsscfg.h"
  43 #include "wlc_mac80211.h"
  44 #include "wl_export.h"
  45 #include "wlc_bmac.h"
  46 #include "wlc_stf.h"
  47
  48 #define MIN_SPATIAL_EXPANSION   0
  49 #define MAX_SPATIAL_EXPANSION   1
  50
  51 #define WLC_STF_SS_STBC_RX(wlc) (WLCISNPHY(wlc->band) && \
  52         NREV_GT(wlc->band->phyrev, 3) && NREV_LE(wlc->band->phyrev, 6))
  53
  54 static bool wlc_stf_stbc_tx_set(struct wlc_info *wlc, s32 int_val);
  55 static int wlc_stf_txcore_set(struct wlc_info *wlc, u8 Nsts, u8 val);
  56 static int wlc_stf_spatial_policy_set(struct wlc_info *wlc, int val);
  57 static void wlc_stf_stbc_rx_ht_update(struct wlc_info *wlc, int val);
  58
  59 static void _wlc_stf_phy_txant_upd(struct wlc_info *wlc);
  60 static u16 _wlc_stf_phytxchain_sel(struct wlc_info *wlc, ratespec_t rspec);
  61
  62 #define NSTS_1  1
  63 #define NSTS_2  2
  64 #define NSTS_3  3
  65 #define NSTS_4  4
  66 const u8 txcore_default[5] = {
  67         (0),                    /* bitmap of the core enabled */
  68         (0x01),                 /* For Nsts = 1, enable core 1 */
  69         (0x03),                 /* For Nsts = 2, enable core 1 & 2 */
  70         (0x07),                 /* For Nsts = 3, enable core 1, 2 & 3 */
  71         (0x0f)                  /* For Nsts = 4, enable all cores */
  72 };
  73
  74 static void wlc_stf_stbc_rx_ht_update(struct wlc_info *wlc, int val)
  75 {
  76         ASSERT((val == HT_CAP_RX_STBC_NO)
  77                || (val == HT_CAP_RX_STBC_ONE_STREAM));
  78
  79         /* MIMOPHYs rev3-6 cannot receive STBC with only one rx core active */
  80         if (WLC_STF_SS_STBC_RX(wlc)) {
  81                 if ((wlc->stf->rxstreams == 1) && (val != HT_CAP_RX_STBC_NO))
  82                         return;
  83         }
  84
  85         wlc->ht_cap.cap_info &= ~HT_CAP_RX_STBC_MASK;
  86         wlc->ht_cap.cap_info |= (val << HT_CAP_RX_STBC_SHIFT);
  87
  88         if (wlc->pub->up) {
  89                 wlc_update_beacon(wlc);
  90                 wlc_update_probe_resp(wlc, true);
  91         }
  92 }
  93
  94 /* every WLC_TEMPSENSE_PERIOD seconds temperature check to decide whether to turn on/off txchain */
  95 void wlc_tempsense_upd(struct wlc_info *wlc)
  96 {
  97         wlc_phy_t *pi = wlc->band->pi;
  98         uint active_chains, txchain;
  99
 100         /* Check if the chip is too hot. Disable one Tx chain, if it is */
 101         /* high 4 bits are for Rx chain, low 4 bits are  for Tx chain */
 102         active_chains = wlc_phy_stf_chain_active_get(pi);
 103         txchain = active_chains & 0xf;
 104
 105         if (wlc->stf->txchain == wlc->stf->hw_txchain) {
 106                 if (txchain && (txchain < wlc->stf->hw_txchain)) {
 107                         /* turn off 1 tx chain */
 108                         wlc_stf_txchain_set(wlc, txchain, true);
 109                 }
 110         } else if (wlc->stf->txchain < wlc->stf->hw_txchain) {
 111                 if (txchain == wlc->stf->hw_txchain) {
 112                         /* turn back on txchain */
 113                         wlc_stf_txchain_set(wlc, txchain, true);
 114                 }
 115         }
 116 }
 117
 118 void
 119 wlc_stf_ss_algo_channel_get(struct wlc_info *wlc, u16 *ss_algo_channel,
 120                             chanspec_t chanspec)
 121 {
 122         tx_power_t power;
 123         u8 siso_mcs_id, cdd_mcs_id, stbc_mcs_id;
 124
 125         /* Clear previous settings */
 126         *ss_algo_channel = 0;
 127
 128         if (!wlc->pub->up) {
 129                 *ss_algo_channel = (u16) -1;
 130                 return;
 131         }
 132
 133         wlc_phy_txpower_get_current(wlc->band->pi, &power,
 134                                     CHSPEC_CHANNEL(chanspec));
 135
 136         siso_mcs_id = (CHSPEC_IS40(chanspec)) ?
 137             WL_TX_POWER_MCS40_SISO_FIRST : WL_TX_POWER_MCS20_SISO_FIRST;
 138         cdd_mcs_id = (CHSPEC_IS40(chanspec)) ?
 139             WL_TX_POWER_MCS40_CDD_FIRST : WL_TX_POWER_MCS20_CDD_FIRST;
 140         stbc_mcs_id = (CHSPEC_IS40(chanspec)) ?
 141             WL_TX_POWER_MCS40_STBC_FIRST : WL_TX_POWER_MCS20_STBC_FIRST;
 142
 143         /* criteria to choose stf mode */
 144
 145         /* the "+3dbm (12 0.25db units)" is to account for the fact that with CDD, tx occurs
 146          * on both chains
 147          */
 148         if (power.target[siso_mcs_id] > (power.target[cdd_mcs_id] + 12))
 149                 setbit(ss_algo_channel, PHY_TXC1_MODE_SISO);
 150         else
 151                 setbit(ss_algo_channel, PHY_TXC1_MODE_CDD);
 152
 153         /* STBC is ORed into to algo channel as STBC requires per-packet SCB capability check
 154          * so cannot be default mode of operation. One of SISO, CDD have to be set
 155          */
 156         if (power.target[siso_mcs_id] <= (power.target[stbc_mcs_id] + 12))
 157                 setbit(ss_algo_channel, PHY_TXC1_MODE_STBC);
 158 }
 159
 160 static bool wlc_stf_stbc_tx_set(struct wlc_info *wlc, s32 int_val)
 161 {
 162         if ((int_val != AUTO) && (int_val != OFF) && (int_val != ON)) {
 163                 return false;
 164         }
 165
 166         if ((int_val == ON) && (wlc->stf->txstreams == 1))
 167                 return false;
 168
 169         if ((int_val == OFF) || (wlc->stf->txstreams == 1)
 170             || !WLC_STBC_CAP_PHY(wlc))
 171                 wlc->ht_cap.cap_info &= ~IEEE80211_HT_CAP_TX_STBC;
 172         else
 173                 wlc->ht_cap.cap_info |= IEEE80211_HT_CAP_TX_STBC;
 174
 175         wlc->bandstate[BAND_2G_INDEX]->band_stf_stbc_tx = (s8) int_val;
 176         wlc->bandstate[BAND_5G_INDEX]->band_stf_stbc_tx = (s8) int_val;
 177
 178         return true;
 179 }
 180
 181 bool wlc_stf_stbc_rx_set(struct wlc_info *wlc, s32 int_val)
 182 {
 183         if ((int_val != HT_CAP_RX_STBC_NO)
 184             && (int_val != HT_CAP_RX_STBC_ONE_STREAM)) {
 185                 return false;
 186         }
 187
 188         if (WLC_STF_SS_STBC_RX(wlc)) {
 189                 if ((int_val != HT_CAP_RX_STBC_NO)
 190                     && (wlc->stf->rxstreams == 1))
 191                         return false;
 192         }
 193
 194         wlc_stf_stbc_rx_ht_update(wlc, int_val);
 195         return true;
 196 }
 197
 198 static int wlc_stf_txcore_set(struct wlc_info *wlc, u8 Nsts, u8 core_mask)
 199 {
 200         WL_TRACE("wl%d: %s: Nsts %d core_mask %x\n",
 201                  wlc->pub->unit, __func__, Nsts, core_mask);
 202
 203         ASSERT((Nsts > 0) && (Nsts <= MAX_STREAMS_SUPPORTED));
 204
 205         if (WLC_BITSCNT(core_mask) > wlc->stf->txstreams) {
 206                 core_mask = 0;
 207         }
 208
 209         if ((WLC_BITSCNT(core_mask) == wlc->stf->txstreams) &&
 210             ((core_mask & ~wlc->stf->txchain)
 211              || !(core_mask & wlc->stf->txchain))) {
 212                 core_mask = wlc->stf->txchain;
 213         }
 214
 215         ASSERT(!core_mask || Nsts <= WLC_BITSCNT(core_mask));
 216
 217         wlc->stf->txcore[Nsts] = core_mask;
 218         /* Nsts = 1..4, txcore index = 1..4 */
 219         if (Nsts == 1) {
 220                 /* Needs to update beacon and ucode generated response
 221                  * frames when 1 stream core map changed
 222                  */
 223                 wlc->stf->phytxant = core_mask << PHY_TXC_ANT_SHIFT;
 224                 wlc_bmac_txant_set(wlc->hw, wlc->stf->phytxant);
 225                 if (wlc->clk) {
 226                         wlc_suspend_mac_and_wait(wlc);
 227                         wlc_beacon_phytxctl_txant_upd(wlc, wlc->bcn_rspec);
 228                         wlc_enable_mac(wlc);
 229                 }
 230         }
 231
 232         return BCME_OK;
 233 }
 234
 235 static int wlc_stf_spatial_policy_set(struct wlc_info *wlc, int val)
 236 {
 237         int i;
 238         u8 core_mask = 0;
 239
 240         WL_TRACE("wl%d: %s: val %x\n", wlc->pub->unit, __func__, val);
 241
 242         wlc->stf->spatial_policy = (s8) val;
 243         for (i = 1; i <= MAX_STREAMS_SUPPORTED; i++) {
 244                 core_mask = (val == MAX_SPATIAL_EXPANSION) ?
 245                     wlc->stf->txchain : txcore_default[i];
 246                 wlc_stf_txcore_set(wlc, (u8) i, core_mask);
 247         }
 248         return BCME_OK;
 249 }
 250
 251 int wlc_stf_txchain_set(struct wlc_info *wlc, s32 int_val, bool force)
 252 {
 253         u8 txchain = (u8) int_val;
 254         u8 txstreams;
 255         uint i;
 256
 257         if (wlc->stf->txchain == txchain)
 258                 return BCME_OK;
 259
 260         if ((txchain & ~wlc->stf->hw_txchain)
 261             || !(txchain & wlc->stf->hw_txchain))
 262                 return BCME_RANGE;
 263
 264         /* if nrate override is configured to be non-SISO STF mode, reject reducing txchain to 1 */
 265         txstreams = (u8) WLC_BITSCNT(txchain);
 266         if (txstreams > MAX_STREAMS_SUPPORTED)
 267                 return BCME_RANGE;
 268
 269         if (txstreams == 1) {
 270                 for (i = 0; i < NBANDS(wlc); i++)
 271                         if ((RSPEC_STF(wlc->bandstate[i]->rspec_override) !=
 272                              PHY_TXC1_MODE_SISO)
 273                             || (RSPEC_STF(wlc->bandstate[i]->mrspec_override) !=
 274                                 PHY_TXC1_MODE_SISO)) {
 275                                 if (!force)
 276                                         return BCME_ERROR;
 277
 278                                 /* over-write the override rspec */
 279                                 if (RSPEC_STF(wlc->bandstate[i]->rspec_override)
 280                                     != PHY_TXC1_MODE_SISO) {
 281                                         wlc->bandstate[i]->rspec_override = 0;
 282                                         WL_ERROR("%s(): temp sense override non-SISO rspec_override\n",
 283                                                  __func__);
 284                                 }
 285                                 if (RSPEC_STF
 286                                     (wlc->bandstate[i]->mrspec_override) !=
 287                                     PHY_TXC1_MODE_SISO) {
 288                                         wlc->bandstate[i]->mrspec_override = 0;
 289                                         WL_ERROR("%s(): temp sense override non-SISO mrspec_override\n",
 290                                                  __func__);
 291                                 }
 292                         }
 293         }
 294
 295         wlc->stf->txchain = txchain;
 296         wlc->stf->txstreams = txstreams;
 297         wlc_stf_stbc_tx_set(wlc, wlc->band->band_stf_stbc_tx);
 298         wlc_stf_ss_update(wlc, wlc->bandstate[BAND_2G_INDEX]);
 299         wlc_stf_ss_update(wlc, wlc->bandstate[BAND_5G_INDEX]);
 300         wlc->stf->txant =
 301             (wlc->stf->txstreams == 1) ? ANT_TX_FORCE_0 : ANT_TX_DEF;
 302         _wlc_stf_phy_txant_upd(wlc);
 303
 304         wlc_phy_stf_chain_set(wlc->band->pi, wlc->stf->txchain,
 305                               wlc->stf->rxchain);
 306
 307         for (i = 1; i <= MAX_STREAMS_SUPPORTED; i++)
 308                 wlc_stf_txcore_set(wlc, (u8) i, txcore_default[i]);
 309
 310         return BCME_OK;
 311 }
 312
 313 /* update wlc->stf->ss_opmode which represents the operational stf_ss mode we're using */
 314 int wlc_stf_ss_update(struct wlc_info *wlc, struct wlcband *band)
 315 {
 316         int ret_code = 0;
 317         u8 prev_stf_ss;
 318         u8 upd_stf_ss;
 319
 320         prev_stf_ss = wlc->stf->ss_opmode;
 321
 322         /* NOTE: opmode can only be SISO or CDD as STBC is decided on a per-packet basis */
 323         if (WLC_STBC_CAP_PHY(wlc) &&
 324             wlc->stf->ss_algosel_auto
 325             && (wlc->stf->ss_algo_channel != (u16) -1)) {
 326                 ASSERT(isset(&wlc->stf->ss_algo_channel, PHY_TXC1_MODE_CDD)
 327                        || isset(&wlc->stf->ss_algo_channel,
 328                                 PHY_TXC1_MODE_SISO));
 329                 upd_stf_ss = (wlc->stf->no_cddstbc || (wlc->stf->txstreams == 1)
 330                               || isset(&wlc->stf->ss_algo_channel,
 331                                        PHY_TXC1_MODE_SISO)) ? PHY_TXC1_MODE_SISO
 332                     : PHY_TXC1_MODE_CDD;
 333         } else {
 334                 if (wlc->band != band)
 335                         return ret_code;
 336                 upd_stf_ss = (wlc->stf->no_cddstbc
 337                               || (wlc->stf->txstreams ==
 338                                   1)) ? PHY_TXC1_MODE_SISO : band->
 339                     band_stf_ss_mode;
 340         }
 341         if (prev_stf_ss != upd_stf_ss) {
 342                 wlc->stf->ss_opmode = upd_stf_ss;
 343                 wlc_bmac_band_stf_ss_set(wlc->hw, upd_stf_ss);
 344         }
 345
 346         return ret_code;
 347 }
 348
 349 int wlc_stf_attach(struct wlc_info *wlc)
 350 {
 351         wlc->bandstate[BAND_2G_INDEX]->band_stf_ss_mode = PHY_TXC1_MODE_SISO;
 352         wlc->bandstate[BAND_5G_INDEX]->band_stf_ss_mode = PHY_TXC1_MODE_CDD;
 353
 354         if (WLCISNPHY(wlc->band) &&
 355             (wlc_phy_txpower_hw_ctrl_get(wlc->band->pi) != PHY_TPC_HW_ON))
 356                 wlc->bandstate[BAND_2G_INDEX]->band_stf_ss_mode =
 357                     PHY_TXC1_MODE_CDD;
 358         wlc_stf_ss_update(wlc, wlc->bandstate[BAND_2G_INDEX]);
 359         wlc_stf_ss_update(wlc, wlc->bandstate[BAND_5G_INDEX]);
 360
 361         wlc_stf_stbc_rx_ht_update(wlc, HT_CAP_RX_STBC_NO);
 362         wlc->bandstate[BAND_2G_INDEX]->band_stf_stbc_tx = OFF;
 363         wlc->bandstate[BAND_5G_INDEX]->band_stf_stbc_tx = OFF;
 364
 365         if (WLC_STBC_CAP_PHY(wlc)) {
 366                 wlc->stf->ss_algosel_auto = true;
 367                 wlc->stf->ss_algo_channel = (u16) -1;   /* Init the default value */
 368         }
 369         return 0;
 370 }
 371
 372 void wlc_stf_detach(struct wlc_info *wlc)
 373 {
 374 }
 375
 376 int wlc_stf_ant_txant_validate(struct wlc_info *wlc, s8 val)
 377 {
 378         int bcmerror = BCME_OK;
 379
 380         /* when there is only 1 tx_streams, don't allow to change the txant */
 381         if (WLCISNPHY(wlc->band) && (wlc->stf->txstreams == 1))
 382                 return ((val == wlc->stf->txant) ? bcmerror : BCME_RANGE);
 383
 384         switch (val) {
 385         case -1:
 386                 val = ANT_TX_DEF;
 387                 break;
 388         case 0:
 389                 val = ANT_TX_FORCE_0;
 390                 break;
 391         case 1:
 392                 val = ANT_TX_FORCE_1;
 393                 break;
 394         case 3:
 395                 val = ANT_TX_LAST_RX;
 396                 break;
 397         default:
 398                 bcmerror = BCME_RANGE;
 399                 break;
 400         }
 401
 402         if (bcmerror == BCME_OK)
 403                 wlc->stf->txant = (s8) val;
 404
 405         return bcmerror;
 406
 407 }
 408
 409 /*
 410  * Centralized txant update function. call it whenever wlc->stf->txant and/or wlc->stf->txchain
 411  *  change
 412  *
 413  * Antennas are controlled by ucode indirectly, which drives PHY or GPIO to
 414  *   achieve various tx/rx antenna selection schemes
 415  *
 416  * legacy phy, bit 6 and bit 7 means antenna 0 and 1 respectively, bit6+bit7 means auto(last rx)
 417  * for NREV<3, bit 6 and bit 7 means antenna 0 and 1 respectively, bit6+bit7 means last rx and
 418  *    do tx-antenna selection for SISO transmissions
 419  * for NREV=3, bit 6 and bit _8_ means antenna 0 and 1 respectively, bit6+bit7 means last rx and
 420  *    do tx-antenna selection for SISO transmissions
 421  * for NREV>=7, bit 6 and bit 7 mean antenna 0 and 1 respectively, nit6+bit7 means both cores active
 422 */
 423 static void _wlc_stf_phy_txant_upd(struct wlc_info *wlc)
 424 {
 425         s8 txant;
 426
 427         txant = (s8) wlc->stf->txant;
 428         ASSERT(txant == ANT_TX_FORCE_0 || txant == ANT_TX_FORCE_1
 429                || txant == ANT_TX_LAST_RX);
 430
 431         if (WLC_PHY_11N_CAP(wlc->band)) {
 432                 if (txant == ANT_TX_FORCE_0) {
 433                         wlc->stf->phytxant = PHY_TXC_ANT_0;
 434                 } else if (txant == ANT_TX_FORCE_1) {
 435                         wlc->stf->phytxant = PHY_TXC_ANT_1;
 436
 437                         if (WLCISNPHY(wlc->band) &&
 438                             NREV_GE(wlc->band->phyrev, 3)
 439                             && NREV_LT(wlc->band->phyrev, 7)) {
 440                                 wlc->stf->phytxant = PHY_TXC_ANT_2;
 441                         }
 442                 } else {
 443                         if (WLCISLCNPHY(wlc->band) || WLCISSSLPNPHY(wlc->band))
 444                                 wlc->stf->phytxant = PHY_TXC_LCNPHY_ANT_LAST;
 445                         else {
 446                                 /* keep this assert to catch out of sync wlc->stf->txcore */
 447                                 ASSERT(wlc->stf->txchain > 0);
 448                                 wlc->stf->phytxant =
 449                                     wlc->stf->txchain << PHY_TXC_ANT_SHIFT;
 450                         }
 451                 }
 452         } else {
 453                 if (txant == ANT_TX_FORCE_0)
 454                         wlc->stf->phytxant = PHY_TXC_OLD_ANT_0;
 455                 else if (txant == ANT_TX_FORCE_1)
 456                         wlc->stf->phytxant = PHY_TXC_OLD_ANT_1;
 457                 else
 458                         wlc->stf->phytxant = PHY_TXC_OLD_ANT_LAST;
 459         }
 460
 461         wlc_bmac_txant_set(wlc->hw, wlc->stf->phytxant);
 462 }
 463
 464 void wlc_stf_phy_txant_upd(struct wlc_info *wlc)
 465 {
 466         _wlc_stf_phy_txant_upd(wlc);
 467 }
 468
 469 void wlc_stf_phy_chain_calc(struct wlc_info *wlc)
 470 {
 471         /* get available rx/tx chains */
 472         wlc->stf->hw_txchain = (u8) getintvar(wlc->pub->vars, "txchain");
 473         wlc->stf->hw_rxchain = (u8) getintvar(wlc->pub->vars, "rxchain");
 474
 475         /* these parameter are intended to be used for all PHY types */
 476         if (wlc->stf->hw_txchain == 0 || wlc->stf->hw_txchain == 0xf) {
 477                 if (WLCISNPHY(wlc->band)) {
 478                         wlc->stf->hw_txchain = TXCHAIN_DEF_NPHY;
 479                 } else {
 480                         wlc->stf->hw_txchain = TXCHAIN_DEF;
 481                 }
 482         }
 483
 484         wlc->stf->txchain = wlc->stf->hw_txchain;
 485         wlc->stf->txstreams = (u8) WLC_BITSCNT(wlc->stf->hw_txchain);
 486
 487         if (wlc->stf->hw_rxchain == 0 || wlc->stf->hw_rxchain == 0xf) {
 488                 if (WLCISNPHY(wlc->band)) {
 489                         wlc->stf->hw_rxchain = RXCHAIN_DEF_NPHY;
 490                 } else {
 491                         wlc->stf->hw_rxchain = RXCHAIN_DEF;
 492                 }
 493         }
 494
 495         wlc->stf->rxchain = wlc->stf->hw_rxchain;
 496         wlc->stf->rxstreams = (u8) WLC_BITSCNT(wlc->stf->hw_rxchain);
 497
 498         /* initialize the txcore table */
 499         memcpy(wlc->stf->txcore, txcore_default, sizeof(wlc->stf->txcore));
 500
 501         /* default spatial_policy */
 502         wlc->stf->spatial_policy = MIN_SPATIAL_EXPANSION;
 503         wlc_stf_spatial_policy_set(wlc, MIN_SPATIAL_EXPANSION);
 504 }
 505
 506 static u16 _wlc_stf_phytxchain_sel(struct wlc_info *wlc, ratespec_t rspec)
 507 {
 508         u16 phytxant = wlc->stf->phytxant;
 509
 510         if (RSPEC_STF(rspec) != PHY_TXC1_MODE_SISO) {
 511                 ASSERT(wlc->stf->txstreams > 1);
 512                 phytxant = wlc->stf->txchain << PHY_TXC_ANT_SHIFT;
 513         } else if (wlc->stf->txant == ANT_TX_DEF)
 514                 phytxant = wlc->stf->txchain << PHY_TXC_ANT_SHIFT;
 515         phytxant &= PHY_TXC_ANT_MASK;
 516         return phytxant;
 517 }
 518
 519 u16 wlc_stf_phytxchain_sel(struct wlc_info *wlc, ratespec_t rspec)
 520 {
 521         return _wlc_stf_phytxchain_sel(wlc, rspec);
 522 }
 523
 524 u16 wlc_stf_d11hdrs_phyctl_txant(struct wlc_info *wlc, ratespec_t rspec)
 525 {
 526         u16 phytxant = wlc->stf->phytxant;
 527         u16 mask = PHY_TXC_ANT_MASK;
 528
 529         /* for non-siso rates or default setting, use the available chains */
 530         if (WLCISNPHY(wlc->band)) {
 531                 ASSERT(wlc->stf->txchain != 0);
 532                 phytxant = _wlc_stf_phytxchain_sel(wlc, rspec);
 533                 mask = PHY_TXC_HTANT_MASK;
 534         }
 535         phytxant |= phytxant & mask;
 536         return phytxant;
 537 }