2 * Copyright (c) 2010 Broadcom Corporation
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.
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.
17 #include <linux/kernel.h>
24 #include <bcmendian.h>
25 #include <proto/802.11.h>
32 #include <wlc_channel.h>
33 #include <wlc_bsscfg.h>
34 #include <wlc_mac80211.h>
36 #include <wl_export.h>
40 #define WLC_STF_SS_STBC_RX(wlc) (WLCISNPHY(wlc->band) && \
41 NREV_GT(wlc->band->phyrev, 3) && NREV_LE(wlc->band->phyrev, 6))
43 static s8 wlc_stf_stbc_rx_get(wlc_info_t *wlc);
44 static bool wlc_stf_stbc_tx_set(wlc_info_t *wlc, s32 int_val);
45 static int wlc_stf_txcore_set(wlc_info_t *wlc, u8 Nsts, u8 val);
46 static int wlc_stf_spatial_policy_set(wlc_info_t *wlc, int val);
47 static void wlc_stf_stbc_rx_ht_update(wlc_info_t *wlc, int val);
49 static void _wlc_stf_phy_txant_upd(wlc_info_t *wlc);
50 static u16 _wlc_stf_phytxchain_sel(wlc_info_t *wlc, ratespec_t rspec);
56 const u8 txcore_default[5] = {
57 (0), /* bitmap of the core enabled */
58 (0x01), /* For Nsts = 1, enable core 1 */
59 (0x03), /* For Nsts = 2, enable core 1 & 2 */
60 (0x07), /* For Nsts = 3, enable core 1, 2 & 3 */
61 (0x0f) /* For Nsts = 4, enable all cores */
64 static void wlc_stf_stbc_rx_ht_update(wlc_info_t *wlc, int val)
66 ASSERT((val == HT_CAP_RX_STBC_NO)
67 || (val == HT_CAP_RX_STBC_ONE_STREAM));
69 /* MIMOPHYs rev3-6 cannot receive STBC with only one rx core active */
70 if (WLC_STF_SS_STBC_RX(wlc)) {
71 if ((wlc->stf->rxstreams == 1) && (val != HT_CAP_RX_STBC_NO))
75 wlc->ht_cap.cap &= ~HT_CAP_RX_STBC_MASK;
76 wlc->ht_cap.cap |= (val << HT_CAP_RX_STBC_SHIFT);
79 wlc_update_beacon(wlc);
80 wlc_update_probe_resp(wlc, true);
84 /* every WLC_TEMPSENSE_PERIOD seconds temperature check to decide whether to turn on/off txchain */
85 void wlc_tempsense_upd(wlc_info_t *wlc)
87 wlc_phy_t *pi = wlc->band->pi;
88 uint active_chains, txchain;
90 /* Check if the chip is too hot. Disable one Tx chain, if it is */
91 /* high 4 bits are for Rx chain, low 4 bits are for Tx chain */
92 active_chains = wlc_phy_stf_chain_active_get(pi);
93 txchain = active_chains & 0xf;
95 if (wlc->stf->txchain == wlc->stf->hw_txchain) {
96 if (txchain && (txchain < wlc->stf->hw_txchain)) {
97 /* turn off 1 tx chain */
98 wlc_stf_txchain_set(wlc, txchain, true);
100 } else if (wlc->stf->txchain < wlc->stf->hw_txchain) {
101 if (txchain == wlc->stf->hw_txchain) {
102 /* turn back on txchain */
103 wlc_stf_txchain_set(wlc, txchain, true);
109 wlc_stf_ss_algo_channel_get(wlc_info_t *wlc, u16 *ss_algo_channel,
113 u8 siso_mcs_id, cdd_mcs_id, stbc_mcs_id;
115 /* Clear previous settings */
116 *ss_algo_channel = 0;
119 *ss_algo_channel = (u16) -1;
123 wlc_phy_txpower_get_current(wlc->band->pi, &power,
124 CHSPEC_CHANNEL(chanspec));
126 siso_mcs_id = (CHSPEC_IS40(chanspec)) ?
127 WL_TX_POWER_MCS40_SISO_FIRST : WL_TX_POWER_MCS20_SISO_FIRST;
128 cdd_mcs_id = (CHSPEC_IS40(chanspec)) ?
129 WL_TX_POWER_MCS40_CDD_FIRST : WL_TX_POWER_MCS20_CDD_FIRST;
130 stbc_mcs_id = (CHSPEC_IS40(chanspec)) ?
131 WL_TX_POWER_MCS40_STBC_FIRST : WL_TX_POWER_MCS20_STBC_FIRST;
133 /* criteria to choose stf mode */
135 /* the "+3dbm (12 0.25db units)" is to account for the fact that with CDD, tx occurs
138 if (power.target[siso_mcs_id] > (power.target[cdd_mcs_id] + 12))
139 setbit(ss_algo_channel, PHY_TXC1_MODE_SISO);
141 setbit(ss_algo_channel, PHY_TXC1_MODE_CDD);
143 /* STBC is ORed into to algo channel as STBC requires per-packet SCB capability check
144 * so cannot be default mode of operation. One of SISO, CDD have to be set
146 if (power.target[siso_mcs_id] <= (power.target[stbc_mcs_id] + 12))
147 setbit(ss_algo_channel, PHY_TXC1_MODE_STBC);
150 static s8 wlc_stf_stbc_rx_get(wlc_info_t *wlc)
152 return (wlc->ht_cap.cap & HT_CAP_RX_STBC_MASK) >> HT_CAP_RX_STBC_SHIFT;
155 static bool wlc_stf_stbc_tx_set(wlc_info_t *wlc, s32 int_val)
157 if ((int_val != AUTO) && (int_val != OFF) && (int_val != ON)) {
161 if ((int_val == ON) && (wlc->stf->txstreams == 1))
164 if ((int_val == OFF) || (wlc->stf->txstreams == 1)
165 || !WLC_STBC_CAP_PHY(wlc))
166 wlc->ht_cap.cap &= ~HT_CAP_TX_STBC;
168 wlc->ht_cap.cap |= HT_CAP_TX_STBC;
170 wlc->bandstate[BAND_2G_INDEX]->band_stf_stbc_tx = (s8) int_val;
171 wlc->bandstate[BAND_5G_INDEX]->band_stf_stbc_tx = (s8) int_val;
176 bool wlc_stf_stbc_rx_set(wlc_info_t *wlc, s32 int_val)
178 if ((int_val != HT_CAP_RX_STBC_NO)
179 && (int_val != HT_CAP_RX_STBC_ONE_STREAM)) {
183 if (WLC_STF_SS_STBC_RX(wlc)) {
184 if ((int_val != HT_CAP_RX_STBC_NO)
185 && (wlc->stf->rxstreams == 1))
189 wlc_stf_stbc_rx_ht_update(wlc, int_val);
193 static int wlc_stf_txcore_set(wlc_info_t *wlc, u8 Nsts, u8 core_mask)
195 WL_TRACE(("wl%d: %s: Nsts %d core_mask %x\n",
196 wlc->pub->unit, __func__, Nsts, core_mask));
198 ASSERT((Nsts > 0) && (Nsts <= MAX_STREAMS_SUPPORTED));
200 if (WLC_BITSCNT(core_mask) > wlc->stf->txstreams) {
204 if ((WLC_BITSCNT(core_mask) == wlc->stf->txstreams) &&
205 ((core_mask & ~wlc->stf->txchain)
206 || !(core_mask & wlc->stf->txchain))) {
207 core_mask = wlc->stf->txchain;
210 ASSERT(!core_mask || Nsts <= WLC_BITSCNT(core_mask));
212 wlc->stf->txcore[Nsts] = core_mask;
213 /* Nsts = 1..4, txcore index = 1..4 */
215 /* Needs to update beacon and ucode generated response
216 * frames when 1 stream core map changed
218 wlc->stf->phytxant = core_mask << PHY_TXC_ANT_SHIFT;
219 wlc_bmac_txant_set(wlc->hw, wlc->stf->phytxant);
221 wlc_suspend_mac_and_wait(wlc);
222 wlc_beacon_phytxctl_txant_upd(wlc, wlc->bcn_rspec);
230 static int wlc_stf_spatial_policy_set(wlc_info_t *wlc, int val)
235 WL_TRACE(("wl%d: %s: val %x\n", wlc->pub->unit, __func__, val));
237 wlc->stf->spatial_policy = (s8) val;
238 for (i = 1; i <= MAX_STREAMS_SUPPORTED; i++) {
239 core_mask = (val == MAX_SPATIAL_EXPANSION) ?
240 wlc->stf->txchain : txcore_default[i];
241 wlc_stf_txcore_set(wlc, (u8) i, core_mask);
246 int wlc_stf_txchain_set(wlc_info_t *wlc, s32 int_val, bool force)
248 u8 txchain = (u8) int_val;
252 if (wlc->stf->txchain == txchain)
255 if ((txchain & ~wlc->stf->hw_txchain)
256 || !(txchain & wlc->stf->hw_txchain))
259 /* if nrate override is configured to be non-SISO STF mode, reject reducing txchain to 1 */
260 txstreams = (u8) WLC_BITSCNT(txchain);
261 if (txstreams > MAX_STREAMS_SUPPORTED)
264 if (txstreams == 1) {
265 for (i = 0; i < NBANDS(wlc); i++)
266 if ((RSPEC_STF(wlc->bandstate[i]->rspec_override) !=
268 || (RSPEC_STF(wlc->bandstate[i]->mrspec_override) !=
269 PHY_TXC1_MODE_SISO)) {
273 /* over-write the override rspec */
274 if (RSPEC_STF(wlc->bandstate[i]->rspec_override)
275 != PHY_TXC1_MODE_SISO) {
276 wlc->bandstate[i]->rspec_override = 0;
277 WL_ERROR(("%s(): temp sense override non-SISO" " rspec_override.\n", __func__));
280 (wlc->bandstate[i]->mrspec_override) !=
281 PHY_TXC1_MODE_SISO) {
282 wlc->bandstate[i]->mrspec_override = 0;
283 WL_ERROR(("%s(): temp sense override non-SISO" " mrspec_override.\n", __func__));
288 wlc->stf->txchain = txchain;
289 wlc->stf->txstreams = txstreams;
290 wlc_stf_stbc_tx_set(wlc, wlc->band->band_stf_stbc_tx);
291 wlc_stf_ss_update(wlc, wlc->bandstate[BAND_2G_INDEX]);
292 wlc_stf_ss_update(wlc, wlc->bandstate[BAND_5G_INDEX]);
294 (wlc->stf->txstreams == 1) ? ANT_TX_FORCE_0 : ANT_TX_DEF;
295 _wlc_stf_phy_txant_upd(wlc);
297 wlc_phy_stf_chain_set(wlc->band->pi, wlc->stf->txchain,
300 for (i = 1; i <= MAX_STREAMS_SUPPORTED; i++)
301 wlc_stf_txcore_set(wlc, (u8) i, txcore_default[i]);
306 int wlc_stf_rxchain_set(wlc_info_t *wlc, s32 int_val)
309 u8 rxchain = (u8) int_val;
311 u8 old_rxchain, old_rxchain_cnt;
313 if (wlc->stf->rxchain == rxchain)
316 if ((rxchain & ~wlc->stf->hw_rxchain)
317 || !(rxchain & wlc->stf->hw_rxchain))
320 rxchain_cnt = (u8) WLC_BITSCNT(rxchain);
321 if (WLC_STF_SS_STBC_RX(wlc)) {
322 if ((rxchain_cnt == 1)
323 && (wlc_stf_stbc_rx_get(wlc) != HT_CAP_RX_STBC_NO))
327 if (APSTA_ENAB(wlc->pub) && (wlc->pub->associated))
328 return BCME_ASSOCIATED;
330 old_rxchain = wlc->stf->rxchain;
331 old_rxchain_cnt = wlc->stf->rxstreams;
333 wlc->stf->rxchain = rxchain;
334 wlc->stf->rxstreams = rxchain_cnt;
336 if (rxchain_cnt != old_rxchain_cnt) {
338 (rxchain_cnt == 1) ? HT_CAP_MIMO_PS_ON : HT_CAP_MIMO_PS_OFF;
339 wlc->mimops_PM = mimops_mode;
340 if (AP_ENAB(wlc->pub)) {
341 wlc_phy_stf_chain_set(wlc->band->pi, wlc->stf->txchain,
343 wlc_ht_mimops_cap_update(wlc, mimops_mode);
344 if (wlc->pub->associated)
345 wlc_mimops_action_ht_send(wlc, wlc->cfg,
349 if (wlc->pub->associated) {
350 if (mimops_mode == HT_CAP_MIMO_PS_OFF) {
351 /* if mimops is off, turn on the Rx chain first */
352 wlc_phy_stf_chain_set(wlc->band->pi,
355 wlc_ht_mimops_cap_update(wlc, mimops_mode);
358 wlc_phy_stf_chain_set(wlc->band->pi, wlc->stf->txchain,
360 wlc_ht_mimops_cap_update(wlc, mimops_mode);
362 } else if (old_rxchain != rxchain)
363 wlc_phy_stf_chain_set(wlc->band->pi, wlc->stf->txchain,
369 /* update wlc->stf->ss_opmode which represents the operational stf_ss mode we're using */
370 int wlc_stf_ss_update(wlc_info_t *wlc, wlcband_t *band)
376 prev_stf_ss = wlc->stf->ss_opmode;
378 /* NOTE: opmode can only be SISO or CDD as STBC is decided on a per-packet basis */
379 if (WLC_STBC_CAP_PHY(wlc) &&
380 wlc->stf->ss_algosel_auto
381 && (wlc->stf->ss_algo_channel != (u16) -1)) {
382 ASSERT(isset(&wlc->stf->ss_algo_channel, PHY_TXC1_MODE_CDD)
383 || isset(&wlc->stf->ss_algo_channel,
384 PHY_TXC1_MODE_SISO));
385 upd_stf_ss = (wlc->stf->no_cddstbc || (wlc->stf->txstreams == 1)
386 || isset(&wlc->stf->ss_algo_channel,
387 PHY_TXC1_MODE_SISO)) ? PHY_TXC1_MODE_SISO
390 if (wlc->band != band)
392 upd_stf_ss = (wlc->stf->no_cddstbc
393 || (wlc->stf->txstreams ==
394 1)) ? PHY_TXC1_MODE_SISO : band->
397 if (prev_stf_ss != upd_stf_ss) {
398 wlc->stf->ss_opmode = upd_stf_ss;
399 wlc_bmac_band_stf_ss_set(wlc->hw, upd_stf_ss);
405 int wlc_stf_attach(wlc_info_t *wlc)
407 wlc->bandstate[BAND_2G_INDEX]->band_stf_ss_mode = PHY_TXC1_MODE_SISO;
408 wlc->bandstate[BAND_5G_INDEX]->band_stf_ss_mode = PHY_TXC1_MODE_CDD;
410 if (WLCISNPHY(wlc->band) &&
411 (wlc_phy_txpower_hw_ctrl_get(wlc->band->pi) != PHY_TPC_HW_ON))
412 wlc->bandstate[BAND_2G_INDEX]->band_stf_ss_mode =
414 wlc_stf_ss_update(wlc, wlc->bandstate[BAND_2G_INDEX]);
415 wlc_stf_ss_update(wlc, wlc->bandstate[BAND_5G_INDEX]);
417 wlc_stf_stbc_rx_ht_update(wlc, HT_CAP_RX_STBC_NO);
418 wlc->bandstate[BAND_2G_INDEX]->band_stf_stbc_tx = OFF;
419 wlc->bandstate[BAND_5G_INDEX]->band_stf_stbc_tx = OFF;
421 if (WLC_STBC_CAP_PHY(wlc)) {
422 wlc->stf->ss_algosel_auto = true;
423 wlc->stf->ss_algo_channel = (u16) -1; /* Init the default value */
428 void wlc_stf_detach(wlc_info_t *wlc)
432 int wlc_stf_ant_txant_validate(wlc_info_t *wlc, s8 val)
434 int bcmerror = BCME_OK;
436 /* when there is only 1 tx_streams, don't allow to change the txant */
437 if (WLCISNPHY(wlc->band) && (wlc->stf->txstreams == 1))
438 return ((val == wlc->stf->txant) ? bcmerror : BCME_RANGE);
445 val = ANT_TX_FORCE_0;
448 val = ANT_TX_FORCE_1;
451 val = ANT_TX_LAST_RX;
454 bcmerror = BCME_RANGE;
458 if (bcmerror == BCME_OK)
459 wlc->stf->txant = (s8) val;
466 * Centralized txant update function. call it whenever wlc->stf->txant and/or wlc->stf->txchain
469 * Antennas are controlled by ucode indirectly, which drives PHY or GPIO to
470 * achieve various tx/rx antenna selection schemes
472 * legacy phy, bit 6 and bit 7 means antenna 0 and 1 respectively, bit6+bit7 means auto(last rx)
473 * for NREV<3, bit 6 and bit 7 means antenna 0 and 1 respectively, bit6+bit7 means last rx and
474 * do tx-antenna selection for SISO transmissions
475 * for NREV=3, bit 6 and bit _8_ means antenna 0 and 1 respectively, bit6+bit7 means last rx and
476 * do tx-antenna selection for SISO transmissions
477 * for NREV>=7, bit 6 and bit 7 mean antenna 0 and 1 respectively, nit6+bit7 means both cores active
479 static void _wlc_stf_phy_txant_upd(wlc_info_t *wlc)
483 txant = (s8) wlc->stf->txant;
484 ASSERT(txant == ANT_TX_FORCE_0 || txant == ANT_TX_FORCE_1
485 || txant == ANT_TX_LAST_RX);
487 if (WLC_PHY_11N_CAP(wlc->band)) {
488 if (txant == ANT_TX_FORCE_0) {
489 wlc->stf->phytxant = PHY_TXC_ANT_0;
490 } else if (txant == ANT_TX_FORCE_1) {
491 wlc->stf->phytxant = PHY_TXC_ANT_1;
493 if (WLCISNPHY(wlc->band) &&
494 NREV_GE(wlc->band->phyrev, 3)
495 && NREV_LT(wlc->band->phyrev, 7)) {
496 wlc->stf->phytxant = PHY_TXC_ANT_2;
499 if (WLCISLCNPHY(wlc->band) || WLCISSSLPNPHY(wlc->band))
500 wlc->stf->phytxant = PHY_TXC_LCNPHY_ANT_LAST;
502 /* keep this assert to catch out of sync wlc->stf->txcore */
503 ASSERT(wlc->stf->txchain > 0);
505 wlc->stf->txchain << PHY_TXC_ANT_SHIFT;
509 if (txant == ANT_TX_FORCE_0)
510 wlc->stf->phytxant = PHY_TXC_OLD_ANT_0;
511 else if (txant == ANT_TX_FORCE_1)
512 wlc->stf->phytxant = PHY_TXC_OLD_ANT_1;
514 wlc->stf->phytxant = PHY_TXC_OLD_ANT_LAST;
517 wlc_bmac_txant_set(wlc->hw, wlc->stf->phytxant);
520 void wlc_stf_phy_txant_upd(wlc_info_t *wlc)
522 _wlc_stf_phy_txant_upd(wlc);
525 void wlc_stf_phy_chain_calc(wlc_info_t *wlc)
527 /* get available rx/tx chains */
528 wlc->stf->hw_txchain = (u8) getintvar(wlc->pub->vars, "txchain");
529 wlc->stf->hw_rxchain = (u8) getintvar(wlc->pub->vars, "rxchain");
531 /* these parameter are intended to be used for all PHY types */
532 if (wlc->stf->hw_txchain == 0 || wlc->stf->hw_txchain == 0xf) {
533 if (WLCISNPHY(wlc->band)) {
534 wlc->stf->hw_txchain = TXCHAIN_DEF_NPHY;
536 wlc->stf->hw_txchain = TXCHAIN_DEF;
540 wlc->stf->txchain = wlc->stf->hw_txchain;
541 wlc->stf->txstreams = (u8) WLC_BITSCNT(wlc->stf->hw_txchain);
543 if (wlc->stf->hw_rxchain == 0 || wlc->stf->hw_rxchain == 0xf) {
544 if (WLCISNPHY(wlc->band)) {
545 wlc->stf->hw_rxchain = RXCHAIN_DEF_NPHY;
547 wlc->stf->hw_rxchain = RXCHAIN_DEF;
551 wlc->stf->rxchain = wlc->stf->hw_rxchain;
552 wlc->stf->rxstreams = (u8) WLC_BITSCNT(wlc->stf->hw_rxchain);
554 /* initialize the txcore table */
555 bcopy(txcore_default, wlc->stf->txcore, sizeof(wlc->stf->txcore));
557 /* default spatial_policy */
558 wlc->stf->spatial_policy = MIN_SPATIAL_EXPANSION;
559 wlc_stf_spatial_policy_set(wlc, MIN_SPATIAL_EXPANSION);
562 static u16 _wlc_stf_phytxchain_sel(wlc_info_t *wlc, ratespec_t rspec)
564 u16 phytxant = wlc->stf->phytxant;
566 if (RSPEC_STF(rspec) != PHY_TXC1_MODE_SISO) {
567 ASSERT(wlc->stf->txstreams > 1);
568 phytxant = wlc->stf->txchain << PHY_TXC_ANT_SHIFT;
569 } else if (wlc->stf->txant == ANT_TX_DEF)
570 phytxant = wlc->stf->txchain << PHY_TXC_ANT_SHIFT;
571 phytxant &= PHY_TXC_ANT_MASK;
575 u16 wlc_stf_phytxchain_sel(wlc_info_t *wlc, ratespec_t rspec)
577 return _wlc_stf_phytxchain_sel(wlc, rspec);
580 u16 wlc_stf_d11hdrs_phyctl_txant(wlc_info_t *wlc, ratespec_t rspec)
582 u16 phytxant = wlc->stf->phytxant;
583 u16 mask = PHY_TXC_ANT_MASK;
585 /* for non-siso rates or default setting, use the available chains */
586 if (WLCISNPHY(wlc->band)) {
587 ASSERT(wlc->stf->txchain != 0);
588 phytxant = _wlc_stf_phytxchain_sel(wlc, rspec);
589 mask = PHY_TXC_HTANT_MASK;
591 phytxant |= phytxant & mask;