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>
20 #include <proto/802.11.h>
30 #include "wlc_types.h"
39 #include "phy/wlc_phy_hal.h"
40 #include "wlc_channel.h"
41 #include "wlc_bsscfg.h"
42 #include "wlc_mac80211.h"
43 #include "wl_export.h"
47 #define MIN_SPATIAL_EXPANSION 0
48 #define MAX_SPATIAL_EXPANSION 1
50 #define WLC_STF_SS_STBC_RX(wlc) (WLCISNPHY(wlc->band) && \
51 NREV_GT(wlc->band->phyrev, 3) && NREV_LE(wlc->band->phyrev, 6))
53 static bool wlc_stf_stbc_tx_set(struct wlc_info *wlc, s32 int_val);
54 static int wlc_stf_txcore_set(struct wlc_info *wlc, u8 Nsts, u8 val);
55 static int wlc_stf_spatial_policy_set(struct wlc_info *wlc, int val);
56 static void wlc_stf_stbc_rx_ht_update(struct wlc_info *wlc, int val);
58 static void _wlc_stf_phy_txant_upd(struct wlc_info *wlc);
59 static u16 _wlc_stf_phytxchain_sel(struct wlc_info *wlc, ratespec_t rspec);
65 const u8 txcore_default[5] = {
66 (0), /* bitmap of the core enabled */
67 (0x01), /* For Nsts = 1, enable core 1 */
68 (0x03), /* For Nsts = 2, enable core 1 & 2 */
69 (0x07), /* For Nsts = 3, enable core 1, 2 & 3 */
70 (0x0f) /* For Nsts = 4, enable all cores */
73 static void wlc_stf_stbc_rx_ht_update(struct wlc_info *wlc, int val)
75 ASSERT((val == HT_CAP_RX_STBC_NO)
76 || (val == HT_CAP_RX_STBC_ONE_STREAM));
78 /* MIMOPHYs rev3-6 cannot receive STBC with only one rx core active */
79 if (WLC_STF_SS_STBC_RX(wlc)) {
80 if ((wlc->stf->rxstreams == 1) && (val != HT_CAP_RX_STBC_NO))
84 wlc->ht_cap.cap_info &= ~HT_CAP_RX_STBC_MASK;
85 wlc->ht_cap.cap_info |= (val << HT_CAP_RX_STBC_SHIFT);
88 wlc_update_beacon(wlc);
89 wlc_update_probe_resp(wlc, true);
93 /* every WLC_TEMPSENSE_PERIOD seconds temperature check to decide whether to turn on/off txchain */
94 void wlc_tempsense_upd(struct wlc_info *wlc)
96 wlc_phy_t *pi = wlc->band->pi;
97 uint active_chains, txchain;
99 /* Check if the chip is too hot. Disable one Tx chain, if it is */
100 /* high 4 bits are for Rx chain, low 4 bits are for Tx chain */
101 active_chains = wlc_phy_stf_chain_active_get(pi);
102 txchain = active_chains & 0xf;
104 if (wlc->stf->txchain == wlc->stf->hw_txchain) {
105 if (txchain && (txchain < wlc->stf->hw_txchain)) {
106 /* turn off 1 tx chain */
107 wlc_stf_txchain_set(wlc, txchain, true);
109 } else if (wlc->stf->txchain < wlc->stf->hw_txchain) {
110 if (txchain == wlc->stf->hw_txchain) {
111 /* turn back on txchain */
112 wlc_stf_txchain_set(wlc, txchain, true);
118 wlc_stf_ss_algo_channel_get(struct wlc_info *wlc, u16 *ss_algo_channel,
122 u8 siso_mcs_id, cdd_mcs_id, stbc_mcs_id;
124 /* Clear previous settings */
125 *ss_algo_channel = 0;
128 *ss_algo_channel = (u16) -1;
132 wlc_phy_txpower_get_current(wlc->band->pi, &power,
133 CHSPEC_CHANNEL(chanspec));
135 siso_mcs_id = (CHSPEC_IS40(chanspec)) ?
136 WL_TX_POWER_MCS40_SISO_FIRST : WL_TX_POWER_MCS20_SISO_FIRST;
137 cdd_mcs_id = (CHSPEC_IS40(chanspec)) ?
138 WL_TX_POWER_MCS40_CDD_FIRST : WL_TX_POWER_MCS20_CDD_FIRST;
139 stbc_mcs_id = (CHSPEC_IS40(chanspec)) ?
140 WL_TX_POWER_MCS40_STBC_FIRST : WL_TX_POWER_MCS20_STBC_FIRST;
142 /* criteria to choose stf mode */
144 /* the "+3dbm (12 0.25db units)" is to account for the fact that with CDD, tx occurs
147 if (power.target[siso_mcs_id] > (power.target[cdd_mcs_id] + 12))
148 setbit(ss_algo_channel, PHY_TXC1_MODE_SISO);
150 setbit(ss_algo_channel, PHY_TXC1_MODE_CDD);
152 /* STBC is ORed into to algo channel as STBC requires per-packet SCB capability check
153 * so cannot be default mode of operation. One of SISO, CDD have to be set
155 if (power.target[siso_mcs_id] <= (power.target[stbc_mcs_id] + 12))
156 setbit(ss_algo_channel, PHY_TXC1_MODE_STBC);
159 static bool wlc_stf_stbc_tx_set(struct wlc_info *wlc, s32 int_val)
161 if ((int_val != AUTO) && (int_val != OFF) && (int_val != ON)) {
165 if ((int_val == ON) && (wlc->stf->txstreams == 1))
168 if ((int_val == OFF) || (wlc->stf->txstreams == 1)
169 || !WLC_STBC_CAP_PHY(wlc))
170 wlc->ht_cap.cap_info &= ~IEEE80211_HT_CAP_TX_STBC;
172 wlc->ht_cap.cap_info |= IEEE80211_HT_CAP_TX_STBC;
174 wlc->bandstate[BAND_2G_INDEX]->band_stf_stbc_tx = (s8) int_val;
175 wlc->bandstate[BAND_5G_INDEX]->band_stf_stbc_tx = (s8) int_val;
180 bool wlc_stf_stbc_rx_set(struct wlc_info *wlc, s32 int_val)
182 if ((int_val != HT_CAP_RX_STBC_NO)
183 && (int_val != HT_CAP_RX_STBC_ONE_STREAM)) {
187 if (WLC_STF_SS_STBC_RX(wlc)) {
188 if ((int_val != HT_CAP_RX_STBC_NO)
189 && (wlc->stf->rxstreams == 1))
193 wlc_stf_stbc_rx_ht_update(wlc, int_val);
197 static int wlc_stf_txcore_set(struct wlc_info *wlc, u8 Nsts, u8 core_mask)
199 WL_TRACE("wl%d: %s: Nsts %d core_mask %x\n",
200 wlc->pub->unit, __func__, Nsts, core_mask);
202 ASSERT((Nsts > 0) && (Nsts <= MAX_STREAMS_SUPPORTED));
204 if (WLC_BITSCNT(core_mask) > wlc->stf->txstreams) {
208 if ((WLC_BITSCNT(core_mask) == wlc->stf->txstreams) &&
209 ((core_mask & ~wlc->stf->txchain)
210 || !(core_mask & wlc->stf->txchain))) {
211 core_mask = wlc->stf->txchain;
214 ASSERT(!core_mask || Nsts <= WLC_BITSCNT(core_mask));
216 wlc->stf->txcore[Nsts] = core_mask;
217 /* Nsts = 1..4, txcore index = 1..4 */
219 /* Needs to update beacon and ucode generated response
220 * frames when 1 stream core map changed
222 wlc->stf->phytxant = core_mask << PHY_TXC_ANT_SHIFT;
223 wlc_bmac_txant_set(wlc->hw, wlc->stf->phytxant);
225 wlc_suspend_mac_and_wait(wlc);
226 wlc_beacon_phytxctl_txant_upd(wlc, wlc->bcn_rspec);
234 static int wlc_stf_spatial_policy_set(struct wlc_info *wlc, int val)
239 WL_TRACE("wl%d: %s: val %x\n", wlc->pub->unit, __func__, val);
241 wlc->stf->spatial_policy = (s8) val;
242 for (i = 1; i <= MAX_STREAMS_SUPPORTED; i++) {
243 core_mask = (val == MAX_SPATIAL_EXPANSION) ?
244 wlc->stf->txchain : txcore_default[i];
245 wlc_stf_txcore_set(wlc, (u8) i, core_mask);
250 int wlc_stf_txchain_set(struct wlc_info *wlc, s32 int_val, bool force)
252 u8 txchain = (u8) int_val;
256 if (wlc->stf->txchain == txchain)
259 if ((txchain & ~wlc->stf->hw_txchain)
260 || !(txchain & wlc->stf->hw_txchain))
263 /* if nrate override is configured to be non-SISO STF mode, reject reducing txchain to 1 */
264 txstreams = (u8) WLC_BITSCNT(txchain);
265 if (txstreams > MAX_STREAMS_SUPPORTED)
268 if (txstreams == 1) {
269 for (i = 0; i < NBANDS(wlc); i++)
270 if ((RSPEC_STF(wlc->bandstate[i]->rspec_override) !=
272 || (RSPEC_STF(wlc->bandstate[i]->mrspec_override) !=
273 PHY_TXC1_MODE_SISO)) {
277 /* over-write the override rspec */
278 if (RSPEC_STF(wlc->bandstate[i]->rspec_override)
279 != PHY_TXC1_MODE_SISO) {
280 wlc->bandstate[i]->rspec_override = 0;
281 WL_ERROR("%s(): temp sense override non-SISO rspec_override\n",
285 (wlc->bandstate[i]->mrspec_override) !=
286 PHY_TXC1_MODE_SISO) {
287 wlc->bandstate[i]->mrspec_override = 0;
288 WL_ERROR("%s(): temp sense override non-SISO mrspec_override\n",
294 wlc->stf->txchain = txchain;
295 wlc->stf->txstreams = txstreams;
296 wlc_stf_stbc_tx_set(wlc, wlc->band->band_stf_stbc_tx);
297 wlc_stf_ss_update(wlc, wlc->bandstate[BAND_2G_INDEX]);
298 wlc_stf_ss_update(wlc, wlc->bandstate[BAND_5G_INDEX]);
300 (wlc->stf->txstreams == 1) ? ANT_TX_FORCE_0 : ANT_TX_DEF;
301 _wlc_stf_phy_txant_upd(wlc);
303 wlc_phy_stf_chain_set(wlc->band->pi, wlc->stf->txchain,
306 for (i = 1; i <= MAX_STREAMS_SUPPORTED; i++)
307 wlc_stf_txcore_set(wlc, (u8) i, txcore_default[i]);
312 /* update wlc->stf->ss_opmode which represents the operational stf_ss mode we're using */
313 int wlc_stf_ss_update(struct wlc_info *wlc, struct wlcband *band)
319 prev_stf_ss = wlc->stf->ss_opmode;
321 /* NOTE: opmode can only be SISO or CDD as STBC is decided on a per-packet basis */
322 if (WLC_STBC_CAP_PHY(wlc) &&
323 wlc->stf->ss_algosel_auto
324 && (wlc->stf->ss_algo_channel != (u16) -1)) {
325 ASSERT(isset(&wlc->stf->ss_algo_channel, PHY_TXC1_MODE_CDD)
326 || isset(&wlc->stf->ss_algo_channel,
327 PHY_TXC1_MODE_SISO));
328 upd_stf_ss = (wlc->stf->no_cddstbc || (wlc->stf->txstreams == 1)
329 || isset(&wlc->stf->ss_algo_channel,
330 PHY_TXC1_MODE_SISO)) ? PHY_TXC1_MODE_SISO
333 if (wlc->band != band)
335 upd_stf_ss = (wlc->stf->no_cddstbc
336 || (wlc->stf->txstreams ==
337 1)) ? PHY_TXC1_MODE_SISO : band->
340 if (prev_stf_ss != upd_stf_ss) {
341 wlc->stf->ss_opmode = upd_stf_ss;
342 wlc_bmac_band_stf_ss_set(wlc->hw, upd_stf_ss);
348 int wlc_stf_attach(struct wlc_info *wlc)
350 wlc->bandstate[BAND_2G_INDEX]->band_stf_ss_mode = PHY_TXC1_MODE_SISO;
351 wlc->bandstate[BAND_5G_INDEX]->band_stf_ss_mode = PHY_TXC1_MODE_CDD;
353 if (WLCISNPHY(wlc->band) &&
354 (wlc_phy_txpower_hw_ctrl_get(wlc->band->pi) != PHY_TPC_HW_ON))
355 wlc->bandstate[BAND_2G_INDEX]->band_stf_ss_mode =
357 wlc_stf_ss_update(wlc, wlc->bandstate[BAND_2G_INDEX]);
358 wlc_stf_ss_update(wlc, wlc->bandstate[BAND_5G_INDEX]);
360 wlc_stf_stbc_rx_ht_update(wlc, HT_CAP_RX_STBC_NO);
361 wlc->bandstate[BAND_2G_INDEX]->band_stf_stbc_tx = OFF;
362 wlc->bandstate[BAND_5G_INDEX]->band_stf_stbc_tx = OFF;
364 if (WLC_STBC_CAP_PHY(wlc)) {
365 wlc->stf->ss_algosel_auto = true;
366 wlc->stf->ss_algo_channel = (u16) -1; /* Init the default value */
371 void wlc_stf_detach(struct wlc_info *wlc)
375 int wlc_stf_ant_txant_validate(struct wlc_info *wlc, s8 val)
377 int bcmerror = BCME_OK;
379 /* when there is only 1 tx_streams, don't allow to change the txant */
380 if (WLCISNPHY(wlc->band) && (wlc->stf->txstreams == 1))
381 return ((val == wlc->stf->txant) ? bcmerror : BCME_RANGE);
388 val = ANT_TX_FORCE_0;
391 val = ANT_TX_FORCE_1;
394 val = ANT_TX_LAST_RX;
397 bcmerror = BCME_RANGE;
401 if (bcmerror == BCME_OK)
402 wlc->stf->txant = (s8) val;
409 * Centralized txant update function. call it whenever wlc->stf->txant and/or wlc->stf->txchain
412 * Antennas are controlled by ucode indirectly, which drives PHY or GPIO to
413 * achieve various tx/rx antenna selection schemes
415 * legacy phy, bit 6 and bit 7 means antenna 0 and 1 respectively, bit6+bit7 means auto(last rx)
416 * for NREV<3, bit 6 and bit 7 means antenna 0 and 1 respectively, bit6+bit7 means last rx and
417 * do tx-antenna selection for SISO transmissions
418 * for NREV=3, bit 6 and bit _8_ means antenna 0 and 1 respectively, bit6+bit7 means last rx and
419 * do tx-antenna selection for SISO transmissions
420 * for NREV>=7, bit 6 and bit 7 mean antenna 0 and 1 respectively, nit6+bit7 means both cores active
422 static void _wlc_stf_phy_txant_upd(struct wlc_info *wlc)
426 txant = (s8) wlc->stf->txant;
427 ASSERT(txant == ANT_TX_FORCE_0 || txant == ANT_TX_FORCE_1
428 || txant == ANT_TX_LAST_RX);
430 if (WLC_PHY_11N_CAP(wlc->band)) {
431 if (txant == ANT_TX_FORCE_0) {
432 wlc->stf->phytxant = PHY_TXC_ANT_0;
433 } else if (txant == ANT_TX_FORCE_1) {
434 wlc->stf->phytxant = PHY_TXC_ANT_1;
436 if (WLCISNPHY(wlc->band) &&
437 NREV_GE(wlc->band->phyrev, 3)
438 && NREV_LT(wlc->band->phyrev, 7)) {
439 wlc->stf->phytxant = PHY_TXC_ANT_2;
442 if (WLCISLCNPHY(wlc->band) || WLCISSSLPNPHY(wlc->band))
443 wlc->stf->phytxant = PHY_TXC_LCNPHY_ANT_LAST;
445 /* keep this assert to catch out of sync wlc->stf->txcore */
446 ASSERT(wlc->stf->txchain > 0);
448 wlc->stf->txchain << PHY_TXC_ANT_SHIFT;
452 if (txant == ANT_TX_FORCE_0)
453 wlc->stf->phytxant = PHY_TXC_OLD_ANT_0;
454 else if (txant == ANT_TX_FORCE_1)
455 wlc->stf->phytxant = PHY_TXC_OLD_ANT_1;
457 wlc->stf->phytxant = PHY_TXC_OLD_ANT_LAST;
460 wlc_bmac_txant_set(wlc->hw, wlc->stf->phytxant);
463 void wlc_stf_phy_txant_upd(struct wlc_info *wlc)
465 _wlc_stf_phy_txant_upd(wlc);
468 void wlc_stf_phy_chain_calc(struct wlc_info *wlc)
470 /* get available rx/tx chains */
471 wlc->stf->hw_txchain = (u8) getintvar(wlc->pub->vars, "txchain");
472 wlc->stf->hw_rxchain = (u8) getintvar(wlc->pub->vars, "rxchain");
474 /* these parameter are intended to be used for all PHY types */
475 if (wlc->stf->hw_txchain == 0 || wlc->stf->hw_txchain == 0xf) {
476 if (WLCISNPHY(wlc->band)) {
477 wlc->stf->hw_txchain = TXCHAIN_DEF_NPHY;
479 wlc->stf->hw_txchain = TXCHAIN_DEF;
483 wlc->stf->txchain = wlc->stf->hw_txchain;
484 wlc->stf->txstreams = (u8) WLC_BITSCNT(wlc->stf->hw_txchain);
486 if (wlc->stf->hw_rxchain == 0 || wlc->stf->hw_rxchain == 0xf) {
487 if (WLCISNPHY(wlc->band)) {
488 wlc->stf->hw_rxchain = RXCHAIN_DEF_NPHY;
490 wlc->stf->hw_rxchain = RXCHAIN_DEF;
494 wlc->stf->rxchain = wlc->stf->hw_rxchain;
495 wlc->stf->rxstreams = (u8) WLC_BITSCNT(wlc->stf->hw_rxchain);
497 /* initialize the txcore table */
498 memcpy(wlc->stf->txcore, txcore_default, sizeof(wlc->stf->txcore));
500 /* default spatial_policy */
501 wlc->stf->spatial_policy = MIN_SPATIAL_EXPANSION;
502 wlc_stf_spatial_policy_set(wlc, MIN_SPATIAL_EXPANSION);
505 static u16 _wlc_stf_phytxchain_sel(struct wlc_info *wlc, ratespec_t rspec)
507 u16 phytxant = wlc->stf->phytxant;
509 if (RSPEC_STF(rspec) != PHY_TXC1_MODE_SISO) {
510 ASSERT(wlc->stf->txstreams > 1);
511 phytxant = wlc->stf->txchain << PHY_TXC_ANT_SHIFT;
512 } else if (wlc->stf->txant == ANT_TX_DEF)
513 phytxant = wlc->stf->txchain << PHY_TXC_ANT_SHIFT;
514 phytxant &= PHY_TXC_ANT_MASK;
518 u16 wlc_stf_phytxchain_sel(struct wlc_info *wlc, ratespec_t rspec)
520 return _wlc_stf_phytxchain_sel(wlc, rspec);
523 u16 wlc_stf_d11hdrs_phyctl_txant(struct wlc_info *wlc, ratespec_t rspec)
525 u16 phytxant = wlc->stf->phytxant;
526 u16 mask = PHY_TXC_ANT_MASK;
528 /* for non-siso rates or default setting, use the available chains */
529 if (WLCISNPHY(wlc->band)) {
530 ASSERT(wlc->stf->txchain != 0);
531 phytxant = _wlc_stf_phytxchain_sel(wlc, rspec);
532 mask = PHY_TXC_HTANT_MASK;
534 phytxant |= phytxant & mask;