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 <net/mac80211.h>
23 #include "phy/phy_hal.h"
29 #define MIN_SPATIAL_EXPANSION 0
30 #define MAX_SPATIAL_EXPANSION 1
32 #define WLC_STF_SS_STBC_RX(wlc) (WLCISNPHY(wlc->band) && \
33 NREV_GT(wlc->band->phyrev, 3) && NREV_LE(wlc->band->phyrev, 6))
35 static bool wlc_stf_stbc_tx_set(struct wlc_info *wlc, s32 int_val);
36 static int wlc_stf_txcore_set(struct wlc_info *wlc, u8 Nsts, u8 val);
37 static int wlc_stf_spatial_policy_set(struct wlc_info *wlc, int val);
38 static void wlc_stf_stbc_rx_ht_update(struct wlc_info *wlc, int val);
40 static void _wlc_stf_phy_txant_upd(struct wlc_info *wlc);
41 static u16 _wlc_stf_phytxchain_sel(struct wlc_info *wlc, ratespec_t rspec);
47 const u8 txcore_default[5] = {
48 (0), /* bitmap of the core enabled */
49 (0x01), /* For Nsts = 1, enable core 1 */
50 (0x03), /* For Nsts = 2, enable core 1 & 2 */
51 (0x07), /* For Nsts = 3, enable core 1, 2 & 3 */
52 (0x0f) /* For Nsts = 4, enable all cores */
55 static void wlc_stf_stbc_rx_ht_update(struct wlc_info *wlc, int val)
57 /* MIMOPHYs rev3-6 cannot receive STBC with only one rx core active */
58 if (WLC_STF_SS_STBC_RX(wlc)) {
59 if ((wlc->stf->rxstreams == 1) && (val != HT_CAP_RX_STBC_NO))
63 wlc->ht_cap.cap_info &= ~IEEE80211_HT_CAP_RX_STBC;
64 wlc->ht_cap.cap_info |= (val << IEEE80211_HT_CAP_RX_STBC_SHIFT);
67 wlc_update_beacon(wlc);
68 wlc_update_probe_resp(wlc, true);
72 /* every WLC_TEMPSENSE_PERIOD seconds temperature check to decide whether to turn on/off txchain */
73 void wlc_tempsense_upd(struct wlc_info *wlc)
75 wlc_phy_t *pi = wlc->band->pi;
76 uint active_chains, txchain;
78 /* Check if the chip is too hot. Disable one Tx chain, if it is */
79 /* high 4 bits are for Rx chain, low 4 bits are for Tx chain */
80 active_chains = wlc_phy_stf_chain_active_get(pi);
81 txchain = active_chains & 0xf;
83 if (wlc->stf->txchain == wlc->stf->hw_txchain) {
84 if (txchain && (txchain < wlc->stf->hw_txchain)) {
85 /* turn off 1 tx chain */
86 wlc_stf_txchain_set(wlc, txchain, true);
88 } else if (wlc->stf->txchain < wlc->stf->hw_txchain) {
89 if (txchain == wlc->stf->hw_txchain) {
90 /* turn back on txchain */
91 wlc_stf_txchain_set(wlc, txchain, true);
97 wlc_stf_ss_algo_channel_get(struct wlc_info *wlc, u16 *ss_algo_channel,
101 u8 siso_mcs_id, cdd_mcs_id, stbc_mcs_id;
103 /* Clear previous settings */
104 *ss_algo_channel = 0;
107 *ss_algo_channel = (u16) -1;
111 wlc_phy_txpower_get_current(wlc->band->pi, &power,
112 CHSPEC_CHANNEL(chanspec));
114 siso_mcs_id = (CHSPEC_IS40(chanspec)) ?
115 WL_TX_POWER_MCS40_SISO_FIRST : WL_TX_POWER_MCS20_SISO_FIRST;
116 cdd_mcs_id = (CHSPEC_IS40(chanspec)) ?
117 WL_TX_POWER_MCS40_CDD_FIRST : WL_TX_POWER_MCS20_CDD_FIRST;
118 stbc_mcs_id = (CHSPEC_IS40(chanspec)) ?
119 WL_TX_POWER_MCS40_STBC_FIRST : WL_TX_POWER_MCS20_STBC_FIRST;
121 /* criteria to choose stf mode */
123 /* the "+3dbm (12 0.25db units)" is to account for the fact that with CDD, tx occurs
126 if (power.target[siso_mcs_id] > (power.target[cdd_mcs_id] + 12))
127 setbit(ss_algo_channel, PHY_TXC1_MODE_SISO);
129 setbit(ss_algo_channel, PHY_TXC1_MODE_CDD);
131 /* STBC is ORed into to algo channel as STBC requires per-packet SCB capability check
132 * so cannot be default mode of operation. One of SISO, CDD have to be set
134 if (power.target[siso_mcs_id] <= (power.target[stbc_mcs_id] + 12))
135 setbit(ss_algo_channel, PHY_TXC1_MODE_STBC);
138 static bool wlc_stf_stbc_tx_set(struct wlc_info *wlc, s32 int_val)
140 if ((int_val != AUTO) && (int_val != OFF) && (int_val != ON)) {
144 if ((int_val == ON) && (wlc->stf->txstreams == 1))
147 if ((int_val == OFF) || (wlc->stf->txstreams == 1)
148 || !WLC_STBC_CAP_PHY(wlc))
149 wlc->ht_cap.cap_info &= ~IEEE80211_HT_CAP_TX_STBC;
151 wlc->ht_cap.cap_info |= IEEE80211_HT_CAP_TX_STBC;
153 wlc->bandstate[BAND_2G_INDEX]->band_stf_stbc_tx = (s8) int_val;
154 wlc->bandstate[BAND_5G_INDEX]->band_stf_stbc_tx = (s8) int_val;
159 bool wlc_stf_stbc_rx_set(struct wlc_info *wlc, s32 int_val)
161 if ((int_val != HT_CAP_RX_STBC_NO)
162 && (int_val != HT_CAP_RX_STBC_ONE_STREAM)) {
166 if (WLC_STF_SS_STBC_RX(wlc)) {
167 if ((int_val != HT_CAP_RX_STBC_NO)
168 && (wlc->stf->rxstreams == 1))
172 wlc_stf_stbc_rx_ht_update(wlc, int_val);
176 static int wlc_stf_txcore_set(struct wlc_info *wlc, u8 Nsts, u8 core_mask)
178 BCMMSG(wlc->wiphy, "wl%d: Nsts %d core_mask %x\n",
179 wlc->pub->unit, Nsts, core_mask);
181 if (WLC_BITSCNT(core_mask) > wlc->stf->txstreams) {
185 if ((WLC_BITSCNT(core_mask) == wlc->stf->txstreams) &&
186 ((core_mask & ~wlc->stf->txchain)
187 || !(core_mask & wlc->stf->txchain))) {
188 core_mask = wlc->stf->txchain;
191 wlc->stf->txcore[Nsts] = core_mask;
192 /* Nsts = 1..4, txcore index = 1..4 */
194 /* Needs to update beacon and ucode generated response
195 * frames when 1 stream core map changed
197 wlc->stf->phytxant = core_mask << PHY_TXC_ANT_SHIFT;
198 wlc_bmac_txant_set(wlc->hw, wlc->stf->phytxant);
200 wlc_suspend_mac_and_wait(wlc);
201 wlc_beacon_phytxctl_txant_upd(wlc, wlc->bcn_rspec);
209 static int wlc_stf_spatial_policy_set(struct wlc_info *wlc, int val)
214 BCMMSG(wlc->wiphy, "wl%d: val %x\n", wlc->pub->unit, val);
216 wlc->stf->spatial_policy = (s8) val;
217 for (i = 1; i <= MAX_STREAMS_SUPPORTED; i++) {
218 core_mask = (val == MAX_SPATIAL_EXPANSION) ?
219 wlc->stf->txchain : txcore_default[i];
220 wlc_stf_txcore_set(wlc, (u8) i, core_mask);
225 int wlc_stf_txchain_set(struct wlc_info *wlc, s32 int_val, bool force)
227 u8 txchain = (u8) int_val;
231 if (wlc->stf->txchain == txchain)
234 if ((txchain & ~wlc->stf->hw_txchain)
235 || !(txchain & wlc->stf->hw_txchain))
238 /* if nrate override is configured to be non-SISO STF mode, reject reducing txchain to 1 */
239 txstreams = (u8) WLC_BITSCNT(txchain);
240 if (txstreams > MAX_STREAMS_SUPPORTED)
243 if (txstreams == 1) {
244 for (i = 0; i < NBANDS(wlc); i++)
245 if ((RSPEC_STF(wlc->bandstate[i]->rspec_override) !=
247 || (RSPEC_STF(wlc->bandstate[i]->mrspec_override) !=
248 PHY_TXC1_MODE_SISO)) {
252 /* over-write the override rspec */
253 if (RSPEC_STF(wlc->bandstate[i]->rspec_override)
254 != PHY_TXC1_MODE_SISO) {
255 wlc->bandstate[i]->rspec_override = 0;
256 wiphy_err(wlc->wiphy, "%s(): temp "
257 "sense override non-SISO "
262 (wlc->bandstate[i]->mrspec_override) !=
263 PHY_TXC1_MODE_SISO) {
264 wlc->bandstate[i]->mrspec_override = 0;
265 wiphy_err(wlc->wiphy, "%s(): temp "
266 "sense override non-SISO "
273 wlc->stf->txchain = txchain;
274 wlc->stf->txstreams = txstreams;
275 wlc_stf_stbc_tx_set(wlc, wlc->band->band_stf_stbc_tx);
276 wlc_stf_ss_update(wlc, wlc->bandstate[BAND_2G_INDEX]);
277 wlc_stf_ss_update(wlc, wlc->bandstate[BAND_5G_INDEX]);
279 (wlc->stf->txstreams == 1) ? ANT_TX_FORCE_0 : ANT_TX_DEF;
280 _wlc_stf_phy_txant_upd(wlc);
282 wlc_phy_stf_chain_set(wlc->band->pi, wlc->stf->txchain,
285 for (i = 1; i <= MAX_STREAMS_SUPPORTED; i++)
286 wlc_stf_txcore_set(wlc, (u8) i, txcore_default[i]);
291 /* update wlc->stf->ss_opmode which represents the operational stf_ss mode we're using */
292 int wlc_stf_ss_update(struct wlc_info *wlc, struct wlcband *band)
298 prev_stf_ss = wlc->stf->ss_opmode;
300 /* NOTE: opmode can only be SISO or CDD as STBC is decided on a per-packet basis */
301 if (WLC_STBC_CAP_PHY(wlc) &&
302 wlc->stf->ss_algosel_auto
303 && (wlc->stf->ss_algo_channel != (u16) -1)) {
304 upd_stf_ss = (wlc->stf->no_cddstbc || (wlc->stf->txstreams == 1)
305 || isset(&wlc->stf->ss_algo_channel,
306 PHY_TXC1_MODE_SISO)) ? PHY_TXC1_MODE_SISO
309 if (wlc->band != band)
311 upd_stf_ss = (wlc->stf->no_cddstbc
312 || (wlc->stf->txstreams ==
313 1)) ? PHY_TXC1_MODE_SISO : band->
316 if (prev_stf_ss != upd_stf_ss) {
317 wlc->stf->ss_opmode = upd_stf_ss;
318 wlc_bmac_band_stf_ss_set(wlc->hw, upd_stf_ss);
324 int wlc_stf_attach(struct wlc_info *wlc)
326 wlc->bandstate[BAND_2G_INDEX]->band_stf_ss_mode = PHY_TXC1_MODE_SISO;
327 wlc->bandstate[BAND_5G_INDEX]->band_stf_ss_mode = PHY_TXC1_MODE_CDD;
329 if (WLCISNPHY(wlc->band) &&
330 (wlc_phy_txpower_hw_ctrl_get(wlc->band->pi) != PHY_TPC_HW_ON))
331 wlc->bandstate[BAND_2G_INDEX]->band_stf_ss_mode =
333 wlc_stf_ss_update(wlc, wlc->bandstate[BAND_2G_INDEX]);
334 wlc_stf_ss_update(wlc, wlc->bandstate[BAND_5G_INDEX]);
336 wlc_stf_stbc_rx_ht_update(wlc, HT_CAP_RX_STBC_NO);
337 wlc->bandstate[BAND_2G_INDEX]->band_stf_stbc_tx = OFF;
338 wlc->bandstate[BAND_5G_INDEX]->band_stf_stbc_tx = OFF;
340 if (WLC_STBC_CAP_PHY(wlc)) {
341 wlc->stf->ss_algosel_auto = true;
342 wlc->stf->ss_algo_channel = (u16) -1; /* Init the default value */
347 void wlc_stf_detach(struct wlc_info *wlc)
352 * Centralized txant update function. call it whenever wlc->stf->txant and/or wlc->stf->txchain
355 * Antennas are controlled by ucode indirectly, which drives PHY or GPIO to
356 * achieve various tx/rx antenna selection schemes
358 * legacy phy, bit 6 and bit 7 means antenna 0 and 1 respectively, bit6+bit7 means auto(last rx)
359 * for NREV<3, bit 6 and bit 7 means antenna 0 and 1 respectively, bit6+bit7 means last rx and
360 * do tx-antenna selection for SISO transmissions
361 * for NREV=3, bit 6 and bit _8_ means antenna 0 and 1 respectively, bit6+bit7 means last rx and
362 * do tx-antenna selection for SISO transmissions
363 * for NREV>=7, bit 6 and bit 7 mean antenna 0 and 1 respectively, nit6+bit7 means both cores active
365 static void _wlc_stf_phy_txant_upd(struct wlc_info *wlc)
369 txant = (s8) wlc->stf->txant;
370 if (WLC_PHY_11N_CAP(wlc->band)) {
371 if (txant == ANT_TX_FORCE_0) {
372 wlc->stf->phytxant = PHY_TXC_ANT_0;
373 } else if (txant == ANT_TX_FORCE_1) {
374 wlc->stf->phytxant = PHY_TXC_ANT_1;
376 if (WLCISNPHY(wlc->band) &&
377 NREV_GE(wlc->band->phyrev, 3)
378 && NREV_LT(wlc->band->phyrev, 7)) {
379 wlc->stf->phytxant = PHY_TXC_ANT_2;
382 if (WLCISLCNPHY(wlc->band) || WLCISSSLPNPHY(wlc->band))
383 wlc->stf->phytxant = PHY_TXC_LCNPHY_ANT_LAST;
385 /* catch out of sync wlc->stf->txcore */
386 WARN_ON(wlc->stf->txchain <= 0);
388 wlc->stf->txchain << PHY_TXC_ANT_SHIFT;
392 if (txant == ANT_TX_FORCE_0)
393 wlc->stf->phytxant = PHY_TXC_OLD_ANT_0;
394 else if (txant == ANT_TX_FORCE_1)
395 wlc->stf->phytxant = PHY_TXC_OLD_ANT_1;
397 wlc->stf->phytxant = PHY_TXC_OLD_ANT_LAST;
400 wlc_bmac_txant_set(wlc->hw, wlc->stf->phytxant);
403 void wlc_stf_phy_txant_upd(struct wlc_info *wlc)
405 _wlc_stf_phy_txant_upd(wlc);
408 void wlc_stf_phy_chain_calc(struct wlc_info *wlc)
410 /* get available rx/tx chains */
411 wlc->stf->hw_txchain = (u8) getintvar(wlc->pub->vars, "txchain");
412 wlc->stf->hw_rxchain = (u8) getintvar(wlc->pub->vars, "rxchain");
414 /* these parameter are intended to be used for all PHY types */
415 if (wlc->stf->hw_txchain == 0 || wlc->stf->hw_txchain == 0xf) {
416 if (WLCISNPHY(wlc->band)) {
417 wlc->stf->hw_txchain = TXCHAIN_DEF_NPHY;
419 wlc->stf->hw_txchain = TXCHAIN_DEF;
423 wlc->stf->txchain = wlc->stf->hw_txchain;
424 wlc->stf->txstreams = (u8) WLC_BITSCNT(wlc->stf->hw_txchain);
426 if (wlc->stf->hw_rxchain == 0 || wlc->stf->hw_rxchain == 0xf) {
427 if (WLCISNPHY(wlc->band)) {
428 wlc->stf->hw_rxchain = RXCHAIN_DEF_NPHY;
430 wlc->stf->hw_rxchain = RXCHAIN_DEF;
434 wlc->stf->rxchain = wlc->stf->hw_rxchain;
435 wlc->stf->rxstreams = (u8) WLC_BITSCNT(wlc->stf->hw_rxchain);
437 /* initialize the txcore table */
438 memcpy(wlc->stf->txcore, txcore_default, sizeof(wlc->stf->txcore));
440 /* default spatial_policy */
441 wlc->stf->spatial_policy = MIN_SPATIAL_EXPANSION;
442 wlc_stf_spatial_policy_set(wlc, MIN_SPATIAL_EXPANSION);
445 static u16 _wlc_stf_phytxchain_sel(struct wlc_info *wlc, ratespec_t rspec)
447 u16 phytxant = wlc->stf->phytxant;
449 if (RSPEC_STF(rspec) != PHY_TXC1_MODE_SISO) {
450 phytxant = wlc->stf->txchain << PHY_TXC_ANT_SHIFT;
451 } else if (wlc->stf->txant == ANT_TX_DEF)
452 phytxant = wlc->stf->txchain << PHY_TXC_ANT_SHIFT;
453 phytxant &= PHY_TXC_ANT_MASK;
457 u16 wlc_stf_phytxchain_sel(struct wlc_info *wlc, ratespec_t rspec)
459 return _wlc_stf_phytxchain_sel(wlc, rspec);
462 u16 wlc_stf_d11hdrs_phyctl_txant(struct wlc_info *wlc, ratespec_t rspec)
464 u16 phytxant = wlc->stf->phytxant;
465 u16 mask = PHY_TXC_ANT_MASK;
467 /* for non-siso rates or default setting, use the available chains */
468 if (WLCISNPHY(wlc->band)) {
469 phytxant = _wlc_stf_phytxchain_sel(wlc, rspec);
470 mask = PHY_TXC_HTANT_MASK;
472 phytxant |= phytxant & mask;