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1/*2 * Copyright (c) 2010 Broadcom Corporation3 *4 * Permission to use, copy, modify, and/or distribute this software for any5 * purpose with or without fee is hereby granted, provided that the above6 * copyright notice and this permission notice appear in all copies.7 *8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY11 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION13 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN14 * 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 029#define MAX_SPATIAL_EXPANSION 130 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_1 135#define NSTS_2 236#define NSTS_3 337#define NSTS_4 438 39static 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 47static 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 to63 * turn on/off txchain.64 */65void 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 86void87brcms_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 with115 * CDD, tx occurs on both chains116 */117 if (power.target[siso_mcs_id] > (power.target[cdd_mcs_id] + 12))118 setbit(ss_algo_channel, PHY_TXC1_MODE_SISO);119 else120 setbit(ss_algo_channel, PHY_TXC1_MODE_CDD);121 122 /*123 * STBC is ORed into to algo channel as STBC requires per-packet SCB124 * capability check so cannot be default mode of operation. One of125 * SISO, CDD have to be set126 */127 if (power.target[siso_mcs_id] <= (power.target[stbc_mcs_id] + 12))128 setbit(ss_algo_channel, PHY_TXC1_MODE_STBC);129}130 131static 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 145bool 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 161static 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 response179 * frames when 1 stream core map changed180 */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 193static 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/or212 * wlc->stf->txchain change.213 *214 * Antennas are controlled by ucode indirectly, which drives PHY or GPIO to215 * achieve various tx/rx antenna selection schemes216 *217 * legacy phy, bit 6 and bit 7 means antenna 0 and 1 respectively, bit6+bit7218 * means auto(last rx).219 * for NREV<3, bit 6 and bit 7 means antenna 0 and 1 respectively, bit6+bit7220 * means last rx and do tx-antenna selection for SISO transmissions221 * for NREV=3, bit 6 and bit _8_ means antenna 0 and 1 respectively, bit6+bit7222 * means last rx and do tx-antenna selection for SISO transmissions223 * for NREV>=7, bit 6 and bit 7 mean antenna 0 and 1 respectively, nit6+bit7224 * means both cores active225*/226static 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 else258 wlc->stf->phytxant = PHY_TXC_OLD_ANT_LAST;259 }260 261 brcms_b_txant_set(wlc->hw, wlc->stf->phytxant);262}263 264int 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, reject279 * reducing txchain to 1280 */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 mode305 * we're using306 */307void 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 a316 * per-packet basis317 */318 if (BRCMS_STBC_CAP_PHY(wlc) &&319 wlc->stf->ss_algosel_auto320 && (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 337int 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 361void brcms_c_stf_detach(struct brcms_c_info *wlc)362{363}364 365void brcms_c_stf_phy_txant_upd(struct brcms_c_info *wlc)366{367 _brcms_c_stf_phy_txant_upd(wlc);368}369 370void 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 else383 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 else393 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 407static 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 420u16 brcms_c_stf_phytxchain_sel(struct brcms_c_info *wlc, u32 rspec)421{422 return _brcms_c_stf_phytxchain_sel(wlc, rspec);423}424 425u16 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