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>
18 #include <linux/module.h>
24 #include <proto/802.11.h>
33 #include <wlc_channel.h>
34 #include <wlc_bsscfg.h>
35 #include <wlc_event.h>
36 #include <wlc_mac80211.h>
38 #include <wl_export.h>
43 #define WLC_STF_SS_STBC_RX(wlc) (WLCISNPHY(wlc->band) && \
44 NREV_GT(wlc->band->phyrev, 3) && NREV_LE(wlc->band->phyrev, 6))
46 static bool wlc_stf_stbc_tx_set(struct wlc_info *wlc, s32 int_val);
47 static int wlc_stf_txcore_set(struct wlc_info *wlc, u8 Nsts, u8 val);
48 static int wlc_stf_spatial_policy_set(struct wlc_info *wlc, int val);
49 static void wlc_stf_stbc_rx_ht_update(struct wlc_info *wlc, int val);
51 static void _wlc_stf_phy_txant_upd(struct wlc_info *wlc);
52 static u16 _wlc_stf_phytxchain_sel(struct wlc_info *wlc, ratespec_t rspec);
58 const u8 txcore_default[5] = {
59 (0), /* bitmap of the core enabled */
60 (0x01), /* For Nsts = 1, enable core 1 */
61 (0x03), /* For Nsts = 2, enable core 1 & 2 */
62 (0x07), /* For Nsts = 3, enable core 1, 2 & 3 */
63 (0x0f) /* For Nsts = 4, enable all cores */
66 static void wlc_stf_stbc_rx_ht_update(struct wlc_info *wlc, int val)
68 ASSERT((val == HT_CAP_RX_STBC_NO)
69 || (val == HT_CAP_RX_STBC_ONE_STREAM));
71 /* MIMOPHYs rev3-6 cannot receive STBC with only one rx core active */
72 if (WLC_STF_SS_STBC_RX(wlc)) {
73 if ((wlc->stf->rxstreams == 1) && (val != HT_CAP_RX_STBC_NO))
77 wlc->ht_cap.cap_info &= ~HT_CAP_RX_STBC_MASK;
78 wlc->ht_cap.cap_info |= (val << HT_CAP_RX_STBC_SHIFT);
81 wlc_update_beacon(wlc);
82 wlc_update_probe_resp(wlc, true);
86 /* every WLC_TEMPSENSE_PERIOD seconds temperature check to decide whether to turn on/off txchain */
87 void wlc_tempsense_upd(struct wlc_info *wlc)
89 wlc_phy_t *pi = wlc->band->pi;
90 uint active_chains, txchain;
92 /* Check if the chip is too hot. Disable one Tx chain, if it is */
93 /* high 4 bits are for Rx chain, low 4 bits are for Tx chain */
94 active_chains = wlc_phy_stf_chain_active_get(pi);
95 txchain = active_chains & 0xf;
97 if (wlc->stf->txchain == wlc->stf->hw_txchain) {
98 if (txchain && (txchain < wlc->stf->hw_txchain)) {
99 /* turn off 1 tx chain */
100 wlc_stf_txchain_set(wlc, txchain, true);
102 } else if (wlc->stf->txchain < wlc->stf->hw_txchain) {
103 if (txchain == wlc->stf->hw_txchain) {
104 /* turn back on txchain */
105 wlc_stf_txchain_set(wlc, txchain, true);
111 wlc_stf_ss_algo_channel_get(struct wlc_info *wlc, u16 *ss_algo_channel,
115 u8 siso_mcs_id, cdd_mcs_id, stbc_mcs_id;
117 /* Clear previous settings */
118 *ss_algo_channel = 0;
121 *ss_algo_channel = (u16) -1;
125 wlc_phy_txpower_get_current(wlc->band->pi, &power,
126 CHSPEC_CHANNEL(chanspec));
128 siso_mcs_id = (CHSPEC_IS40(chanspec)) ?
129 WL_TX_POWER_MCS40_SISO_FIRST : WL_TX_POWER_MCS20_SISO_FIRST;
130 cdd_mcs_id = (CHSPEC_IS40(chanspec)) ?
131 WL_TX_POWER_MCS40_CDD_FIRST : WL_TX_POWER_MCS20_CDD_FIRST;
132 stbc_mcs_id = (CHSPEC_IS40(chanspec)) ?
133 WL_TX_POWER_MCS40_STBC_FIRST : WL_TX_POWER_MCS20_STBC_FIRST;
135 /* criteria to choose stf mode */
137 /* the "+3dbm (12 0.25db units)" is to account for the fact that with CDD, tx occurs
140 if (power.target[siso_mcs_id] > (power.target[cdd_mcs_id] + 12))
141 setbit(ss_algo_channel, PHY_TXC1_MODE_SISO);
143 setbit(ss_algo_channel, PHY_TXC1_MODE_CDD);
145 /* STBC is ORed into to algo channel as STBC requires per-packet SCB capability check
146 * so cannot be default mode of operation. One of SISO, CDD have to be set
148 if (power.target[siso_mcs_id] <= (power.target[stbc_mcs_id] + 12))
149 setbit(ss_algo_channel, PHY_TXC1_MODE_STBC);
152 static bool wlc_stf_stbc_tx_set(struct wlc_info *wlc, s32 int_val)
154 if ((int_val != AUTO) && (int_val != OFF) && (int_val != ON)) {
158 if ((int_val == ON) && (wlc->stf->txstreams == 1))
161 if ((int_val == OFF) || (wlc->stf->txstreams == 1)
162 || !WLC_STBC_CAP_PHY(wlc))
163 wlc->ht_cap.cap_info &= ~IEEE80211_HT_CAP_TX_STBC;
165 wlc->ht_cap.cap_info |= IEEE80211_HT_CAP_TX_STBC;
167 wlc->bandstate[BAND_2G_INDEX]->band_stf_stbc_tx = (s8) int_val;
168 wlc->bandstate[BAND_5G_INDEX]->band_stf_stbc_tx = (s8) int_val;
173 bool wlc_stf_stbc_rx_set(struct wlc_info *wlc, s32 int_val)
175 if ((int_val != HT_CAP_RX_STBC_NO)
176 && (int_val != HT_CAP_RX_STBC_ONE_STREAM)) {
180 if (WLC_STF_SS_STBC_RX(wlc)) {
181 if ((int_val != HT_CAP_RX_STBC_NO)
182 && (wlc->stf->rxstreams == 1))
186 wlc_stf_stbc_rx_ht_update(wlc, int_val);
190 static int wlc_stf_txcore_set(struct wlc_info *wlc, u8 Nsts, u8 core_mask)
192 WL_TRACE("wl%d: %s: Nsts %d core_mask %x\n",
193 wlc->pub->unit, __func__, Nsts, core_mask);
195 ASSERT((Nsts > 0) && (Nsts <= MAX_STREAMS_SUPPORTED));
197 if (WLC_BITSCNT(core_mask) > wlc->stf->txstreams) {
201 if ((WLC_BITSCNT(core_mask) == wlc->stf->txstreams) &&
202 ((core_mask & ~wlc->stf->txchain)
203 || !(core_mask & wlc->stf->txchain))) {
204 core_mask = wlc->stf->txchain;
207 ASSERT(!core_mask || Nsts <= WLC_BITSCNT(core_mask));
209 wlc->stf->txcore[Nsts] = core_mask;
210 /* Nsts = 1..4, txcore index = 1..4 */
212 /* Needs to update beacon and ucode generated response
213 * frames when 1 stream core map changed
215 wlc->stf->phytxant = core_mask << PHY_TXC_ANT_SHIFT;
216 wlc_bmac_txant_set(wlc->hw, wlc->stf->phytxant);
218 wlc_suspend_mac_and_wait(wlc);
219 wlc_beacon_phytxctl_txant_upd(wlc, wlc->bcn_rspec);
227 static int wlc_stf_spatial_policy_set(struct wlc_info *wlc, int val)
232 WL_TRACE("wl%d: %s: val %x\n", wlc->pub->unit, __func__, val);
234 wlc->stf->spatial_policy = (s8) val;
235 for (i = 1; i <= MAX_STREAMS_SUPPORTED; i++) {
236 core_mask = (val == MAX_SPATIAL_EXPANSION) ?
237 wlc->stf->txchain : txcore_default[i];
238 wlc_stf_txcore_set(wlc, (u8) i, core_mask);
243 int wlc_stf_txchain_set(struct wlc_info *wlc, s32 int_val, bool force)
245 u8 txchain = (u8) int_val;
249 if (wlc->stf->txchain == txchain)
252 if ((txchain & ~wlc->stf->hw_txchain)
253 || !(txchain & wlc->stf->hw_txchain))
256 /* if nrate override is configured to be non-SISO STF mode, reject reducing txchain to 1 */
257 txstreams = (u8) WLC_BITSCNT(txchain);
258 if (txstreams > MAX_STREAMS_SUPPORTED)
261 if (txstreams == 1) {
262 for (i = 0; i < NBANDS(wlc); i++)
263 if ((RSPEC_STF(wlc->bandstate[i]->rspec_override) !=
265 || (RSPEC_STF(wlc->bandstate[i]->mrspec_override) !=
266 PHY_TXC1_MODE_SISO)) {
270 /* over-write the override rspec */
271 if (RSPEC_STF(wlc->bandstate[i]->rspec_override)
272 != PHY_TXC1_MODE_SISO) {
273 wlc->bandstate[i]->rspec_override = 0;
274 WL_ERROR("%s(): temp sense override non-SISO rspec_override\n",
278 (wlc->bandstate[i]->mrspec_override) !=
279 PHY_TXC1_MODE_SISO) {
280 wlc->bandstate[i]->mrspec_override = 0;
281 WL_ERROR("%s(): temp sense override non-SISO mrspec_override\n",
287 wlc->stf->txchain = txchain;
288 wlc->stf->txstreams = txstreams;
289 wlc_stf_stbc_tx_set(wlc, wlc->band->band_stf_stbc_tx);
290 wlc_stf_ss_update(wlc, wlc->bandstate[BAND_2G_INDEX]);
291 wlc_stf_ss_update(wlc, wlc->bandstate[BAND_5G_INDEX]);
293 (wlc->stf->txstreams == 1) ? ANT_TX_FORCE_0 : ANT_TX_DEF;
294 _wlc_stf_phy_txant_upd(wlc);
296 wlc_phy_stf_chain_set(wlc->band->pi, wlc->stf->txchain,
299 for (i = 1; i <= MAX_STREAMS_SUPPORTED; i++)
300 wlc_stf_txcore_set(wlc, (u8) i, txcore_default[i]);
305 /* update wlc->stf->ss_opmode which represents the operational stf_ss mode we're using */
306 int wlc_stf_ss_update(struct wlc_info *wlc, struct wlcband *band)
312 prev_stf_ss = wlc->stf->ss_opmode;
314 /* NOTE: opmode can only be SISO or CDD as STBC is decided on a per-packet basis */
315 if (WLC_STBC_CAP_PHY(wlc) &&
316 wlc->stf->ss_algosel_auto
317 && (wlc->stf->ss_algo_channel != (u16) -1)) {
318 ASSERT(isset(&wlc->stf->ss_algo_channel, PHY_TXC1_MODE_CDD)
319 || isset(&wlc->stf->ss_algo_channel,
320 PHY_TXC1_MODE_SISO));
321 upd_stf_ss = (wlc->stf->no_cddstbc || (wlc->stf->txstreams == 1)
322 || isset(&wlc->stf->ss_algo_channel,
323 PHY_TXC1_MODE_SISO)) ? PHY_TXC1_MODE_SISO
326 if (wlc->band != band)
328 upd_stf_ss = (wlc->stf->no_cddstbc
329 || (wlc->stf->txstreams ==
330 1)) ? PHY_TXC1_MODE_SISO : band->
333 if (prev_stf_ss != upd_stf_ss) {
334 wlc->stf->ss_opmode = upd_stf_ss;
335 wlc_bmac_band_stf_ss_set(wlc->hw, upd_stf_ss);
341 int wlc_stf_attach(struct wlc_info *wlc)
343 wlc->bandstate[BAND_2G_INDEX]->band_stf_ss_mode = PHY_TXC1_MODE_SISO;
344 wlc->bandstate[BAND_5G_INDEX]->band_stf_ss_mode = PHY_TXC1_MODE_CDD;
346 if (WLCISNPHY(wlc->band) &&
347 (wlc_phy_txpower_hw_ctrl_get(wlc->band->pi) != PHY_TPC_HW_ON))
348 wlc->bandstate[BAND_2G_INDEX]->band_stf_ss_mode =
350 wlc_stf_ss_update(wlc, wlc->bandstate[BAND_2G_INDEX]);
351 wlc_stf_ss_update(wlc, wlc->bandstate[BAND_5G_INDEX]);
353 wlc_stf_stbc_rx_ht_update(wlc, HT_CAP_RX_STBC_NO);
354 wlc->bandstate[BAND_2G_INDEX]->band_stf_stbc_tx = OFF;
355 wlc->bandstate[BAND_5G_INDEX]->band_stf_stbc_tx = OFF;
357 if (WLC_STBC_CAP_PHY(wlc)) {
358 wlc->stf->ss_algosel_auto = true;
359 wlc->stf->ss_algo_channel = (u16) -1; /* Init the default value */
364 void wlc_stf_detach(struct wlc_info *wlc)
368 int wlc_stf_ant_txant_validate(struct wlc_info *wlc, s8 val)
370 int bcmerror = BCME_OK;
372 /* when there is only 1 tx_streams, don't allow to change the txant */
373 if (WLCISNPHY(wlc->band) && (wlc->stf->txstreams == 1))
374 return ((val == wlc->stf->txant) ? bcmerror : BCME_RANGE);
381 val = ANT_TX_FORCE_0;
384 val = ANT_TX_FORCE_1;
387 val = ANT_TX_LAST_RX;
390 bcmerror = BCME_RANGE;
394 if (bcmerror == BCME_OK)
395 wlc->stf->txant = (s8) val;
402 * Centralized txant update function. call it whenever wlc->stf->txant and/or wlc->stf->txchain
405 * Antennas are controlled by ucode indirectly, which drives PHY or GPIO to
406 * achieve various tx/rx antenna selection schemes
408 * legacy phy, bit 6 and bit 7 means antenna 0 and 1 respectively, bit6+bit7 means auto(last rx)
409 * for NREV<3, bit 6 and bit 7 means antenna 0 and 1 respectively, bit6+bit7 means last rx and
410 * do tx-antenna selection for SISO transmissions
411 * for NREV=3, bit 6 and bit _8_ means antenna 0 and 1 respectively, bit6+bit7 means last rx and
412 * do tx-antenna selection for SISO transmissions
413 * for NREV>=7, bit 6 and bit 7 mean antenna 0 and 1 respectively, nit6+bit7 means both cores active
415 static void _wlc_stf_phy_txant_upd(struct wlc_info *wlc)
419 txant = (s8) wlc->stf->txant;
420 ASSERT(txant == ANT_TX_FORCE_0 || txant == ANT_TX_FORCE_1
421 || txant == ANT_TX_LAST_RX);
423 if (WLC_PHY_11N_CAP(wlc->band)) {
424 if (txant == ANT_TX_FORCE_0) {
425 wlc->stf->phytxant = PHY_TXC_ANT_0;
426 } else if (txant == ANT_TX_FORCE_1) {
427 wlc->stf->phytxant = PHY_TXC_ANT_1;
429 if (WLCISNPHY(wlc->band) &&
430 NREV_GE(wlc->band->phyrev, 3)
431 && NREV_LT(wlc->band->phyrev, 7)) {
432 wlc->stf->phytxant = PHY_TXC_ANT_2;
435 if (WLCISLCNPHY(wlc->band) || WLCISSSLPNPHY(wlc->band))
436 wlc->stf->phytxant = PHY_TXC_LCNPHY_ANT_LAST;
438 /* keep this assert to catch out of sync wlc->stf->txcore */
439 ASSERT(wlc->stf->txchain > 0);
441 wlc->stf->txchain << PHY_TXC_ANT_SHIFT;
445 if (txant == ANT_TX_FORCE_0)
446 wlc->stf->phytxant = PHY_TXC_OLD_ANT_0;
447 else if (txant == ANT_TX_FORCE_1)
448 wlc->stf->phytxant = PHY_TXC_OLD_ANT_1;
450 wlc->stf->phytxant = PHY_TXC_OLD_ANT_LAST;
453 wlc_bmac_txant_set(wlc->hw, wlc->stf->phytxant);
456 void wlc_stf_phy_txant_upd(struct wlc_info *wlc)
458 _wlc_stf_phy_txant_upd(wlc);
461 void wlc_stf_phy_chain_calc(struct wlc_info *wlc)
463 /* get available rx/tx chains */
464 wlc->stf->hw_txchain = (u8) getintvar(wlc->pub->vars, "txchain");
465 wlc->stf->hw_rxchain = (u8) getintvar(wlc->pub->vars, "rxchain");
467 /* these parameter are intended to be used for all PHY types */
468 if (wlc->stf->hw_txchain == 0 || wlc->stf->hw_txchain == 0xf) {
469 if (WLCISNPHY(wlc->band)) {
470 wlc->stf->hw_txchain = TXCHAIN_DEF_NPHY;
472 wlc->stf->hw_txchain = TXCHAIN_DEF;
476 wlc->stf->txchain = wlc->stf->hw_txchain;
477 wlc->stf->txstreams = (u8) WLC_BITSCNT(wlc->stf->hw_txchain);
479 if (wlc->stf->hw_rxchain == 0 || wlc->stf->hw_rxchain == 0xf) {
480 if (WLCISNPHY(wlc->band)) {
481 wlc->stf->hw_rxchain = RXCHAIN_DEF_NPHY;
483 wlc->stf->hw_rxchain = RXCHAIN_DEF;
487 wlc->stf->rxchain = wlc->stf->hw_rxchain;
488 wlc->stf->rxstreams = (u8) WLC_BITSCNT(wlc->stf->hw_rxchain);
490 /* initialize the txcore table */
491 memcpy(wlc->stf->txcore, txcore_default, sizeof(wlc->stf->txcore));
493 /* default spatial_policy */
494 wlc->stf->spatial_policy = MIN_SPATIAL_EXPANSION;
495 wlc_stf_spatial_policy_set(wlc, MIN_SPATIAL_EXPANSION);
498 static u16 _wlc_stf_phytxchain_sel(struct wlc_info *wlc, ratespec_t rspec)
500 u16 phytxant = wlc->stf->phytxant;
502 if (RSPEC_STF(rspec) != PHY_TXC1_MODE_SISO) {
503 ASSERT(wlc->stf->txstreams > 1);
504 phytxant = wlc->stf->txchain << PHY_TXC_ANT_SHIFT;
505 } else if (wlc->stf->txant == ANT_TX_DEF)
506 phytxant = wlc->stf->txchain << PHY_TXC_ANT_SHIFT;
507 phytxant &= PHY_TXC_ANT_MASK;
511 u16 wlc_stf_phytxchain_sel(struct wlc_info *wlc, ratespec_t rspec)
513 return _wlc_stf_phytxchain_sel(wlc, rspec);
516 u16 wlc_stf_d11hdrs_phyctl_txant(struct wlc_info *wlc, ratespec_t rspec)
518 u16 phytxant = wlc->stf->phytxant;
519 u16 mask = PHY_TXC_ANT_MASK;
521 /* for non-siso rates or default setting, use the available chains */
522 if (WLCISNPHY(wlc->band)) {
523 ASSERT(wlc->stf->txchain != 0);
524 phytxant = _wlc_stf_phytxchain_sel(wlc, rspec);
525 mask = PHY_TXC_HTANT_MASK;
527 phytxant |= phytxant & mask;