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>
21 #include <brcmu_utils.h>
23 #include <brcmu_wifi.h>
31 #include "phy/phy_hal.h"
34 #include "bottom_mac.h"
37 #define MIN_SPATIAL_EXPANSION 0
38 #define MAX_SPATIAL_EXPANSION 1
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 bool wlc_stf_stbc_tx_set(struct wlc_info *wlc, s32 int_val);
44 static int wlc_stf_txcore_set(struct wlc_info *wlc, u8 Nsts, u8 val);
45 static int wlc_stf_spatial_policy_set(struct wlc_info *wlc, int val);
46 static void wlc_stf_stbc_rx_ht_update(struct wlc_info *wlc, int val);
48 static void _wlc_stf_phy_txant_upd(struct wlc_info *wlc);
49 static u16 _wlc_stf_phytxchain_sel(struct wlc_info *wlc, ratespec_t rspec);
55 const u8 txcore_default[5] = {
56 (0), /* bitmap of the core enabled */
57 (0x01), /* For Nsts = 1, enable core 1 */
58 (0x03), /* For Nsts = 2, enable core 1 & 2 */
59 (0x07), /* For Nsts = 3, enable core 1, 2 & 3 */
60 (0x0f) /* For Nsts = 4, enable all cores */
63 static void wlc_stf_stbc_rx_ht_update(struct wlc_info *wlc, int val)
65 /* MIMOPHYs rev3-6 cannot receive STBC with only one rx core active */
66 if (WLC_STF_SS_STBC_RX(wlc)) {
67 if ((wlc->stf->rxstreams == 1) && (val != HT_CAP_RX_STBC_NO))
71 wlc->ht_cap.cap_info &= ~IEEE80211_HT_CAP_RX_STBC;
72 wlc->ht_cap.cap_info |= (val << IEEE80211_HT_CAP_RX_STBC_SHIFT);
75 wlc_update_beacon(wlc);
76 wlc_update_probe_resp(wlc, true);
80 /* every WLC_TEMPSENSE_PERIOD seconds temperature check to decide whether to turn on/off txchain */
81 void wlc_tempsense_upd(struct wlc_info *wlc)
83 wlc_phy_t *pi = wlc->band->pi;
84 uint active_chains, txchain;
86 /* Check if the chip is too hot. Disable one Tx chain, if it is */
87 /* high 4 bits are for Rx chain, low 4 bits are for Tx chain */
88 active_chains = wlc_phy_stf_chain_active_get(pi);
89 txchain = active_chains & 0xf;
91 if (wlc->stf->txchain == wlc->stf->hw_txchain) {
92 if (txchain && (txchain < wlc->stf->hw_txchain)) {
93 /* turn off 1 tx chain */
94 wlc_stf_txchain_set(wlc, txchain, true);
96 } else if (wlc->stf->txchain < wlc->stf->hw_txchain) {
97 if (txchain == wlc->stf->hw_txchain) {
98 /* turn back on txchain */
99 wlc_stf_txchain_set(wlc, txchain, true);
105 wlc_stf_ss_algo_channel_get(struct wlc_info *wlc, u16 *ss_algo_channel,
109 u8 siso_mcs_id, cdd_mcs_id, stbc_mcs_id;
111 /* Clear previous settings */
112 *ss_algo_channel = 0;
115 *ss_algo_channel = (u16) -1;
119 wlc_phy_txpower_get_current(wlc->band->pi, &power,
120 CHSPEC_CHANNEL(chanspec));
122 siso_mcs_id = (CHSPEC_IS40(chanspec)) ?
123 WL_TX_POWER_MCS40_SISO_FIRST : WL_TX_POWER_MCS20_SISO_FIRST;
124 cdd_mcs_id = (CHSPEC_IS40(chanspec)) ?
125 WL_TX_POWER_MCS40_CDD_FIRST : WL_TX_POWER_MCS20_CDD_FIRST;
126 stbc_mcs_id = (CHSPEC_IS40(chanspec)) ?
127 WL_TX_POWER_MCS40_STBC_FIRST : WL_TX_POWER_MCS20_STBC_FIRST;
129 /* criteria to choose stf mode */
131 /* the "+3dbm (12 0.25db units)" is to account for the fact that with CDD, tx occurs
134 if (power.target[siso_mcs_id] > (power.target[cdd_mcs_id] + 12))
135 setbit(ss_algo_channel, PHY_TXC1_MODE_SISO);
137 setbit(ss_algo_channel, PHY_TXC1_MODE_CDD);
139 /* STBC is ORed into to algo channel as STBC requires per-packet SCB capability check
140 * so cannot be default mode of operation. One of SISO, CDD have to be set
142 if (power.target[siso_mcs_id] <= (power.target[stbc_mcs_id] + 12))
143 setbit(ss_algo_channel, PHY_TXC1_MODE_STBC);
146 static bool wlc_stf_stbc_tx_set(struct wlc_info *wlc, s32 int_val)
148 if ((int_val != AUTO) && (int_val != OFF) && (int_val != ON)) {
152 if ((int_val == ON) && (wlc->stf->txstreams == 1))
155 if ((int_val == OFF) || (wlc->stf->txstreams == 1)
156 || !WLC_STBC_CAP_PHY(wlc))
157 wlc->ht_cap.cap_info &= ~IEEE80211_HT_CAP_TX_STBC;
159 wlc->ht_cap.cap_info |= IEEE80211_HT_CAP_TX_STBC;
161 wlc->bandstate[BAND_2G_INDEX]->band_stf_stbc_tx = (s8) int_val;
162 wlc->bandstate[BAND_5G_INDEX]->band_stf_stbc_tx = (s8) int_val;
167 bool wlc_stf_stbc_rx_set(struct wlc_info *wlc, s32 int_val)
169 if ((int_val != HT_CAP_RX_STBC_NO)
170 && (int_val != HT_CAP_RX_STBC_ONE_STREAM)) {
174 if (WLC_STF_SS_STBC_RX(wlc)) {
175 if ((int_val != HT_CAP_RX_STBC_NO)
176 && (wlc->stf->rxstreams == 1))
180 wlc_stf_stbc_rx_ht_update(wlc, int_val);
184 static int wlc_stf_txcore_set(struct wlc_info *wlc, u8 Nsts, u8 core_mask)
186 BCMMSG(wlc->wiphy, "wl%d: Nsts %d core_mask %x\n",
187 wlc->pub->unit, Nsts, core_mask);
189 if (WLC_BITSCNT(core_mask) > wlc->stf->txstreams) {
193 if ((WLC_BITSCNT(core_mask) == wlc->stf->txstreams) &&
194 ((core_mask & ~wlc->stf->txchain)
195 || !(core_mask & wlc->stf->txchain))) {
196 core_mask = wlc->stf->txchain;
199 wlc->stf->txcore[Nsts] = core_mask;
200 /* Nsts = 1..4, txcore index = 1..4 */
202 /* Needs to update beacon and ucode generated response
203 * frames when 1 stream core map changed
205 wlc->stf->phytxant = core_mask << PHY_TXC_ANT_SHIFT;
206 wlc_bmac_txant_set(wlc->hw, wlc->stf->phytxant);
208 wlc_suspend_mac_and_wait(wlc);
209 wlc_beacon_phytxctl_txant_upd(wlc, wlc->bcn_rspec);
217 static int wlc_stf_spatial_policy_set(struct wlc_info *wlc, int val)
222 BCMMSG(wlc->wiphy, "wl%d: val %x\n", wlc->pub->unit, val);
224 wlc->stf->spatial_policy = (s8) val;
225 for (i = 1; i <= MAX_STREAMS_SUPPORTED; i++) {
226 core_mask = (val == MAX_SPATIAL_EXPANSION) ?
227 wlc->stf->txchain : txcore_default[i];
228 wlc_stf_txcore_set(wlc, (u8) i, core_mask);
233 int wlc_stf_txchain_set(struct wlc_info *wlc, s32 int_val, bool force)
235 u8 txchain = (u8) int_val;
239 if (wlc->stf->txchain == txchain)
242 if ((txchain & ~wlc->stf->hw_txchain)
243 || !(txchain & wlc->stf->hw_txchain))
246 /* if nrate override is configured to be non-SISO STF mode, reject reducing txchain to 1 */
247 txstreams = (u8) WLC_BITSCNT(txchain);
248 if (txstreams > MAX_STREAMS_SUPPORTED)
251 if (txstreams == 1) {
252 for (i = 0; i < NBANDS(wlc); i++)
253 if ((RSPEC_STF(wlc->bandstate[i]->rspec_override) !=
255 || (RSPEC_STF(wlc->bandstate[i]->mrspec_override) !=
256 PHY_TXC1_MODE_SISO)) {
260 /* over-write the override rspec */
261 if (RSPEC_STF(wlc->bandstate[i]->rspec_override)
262 != PHY_TXC1_MODE_SISO) {
263 wlc->bandstate[i]->rspec_override = 0;
264 wiphy_err(wlc->wiphy, "%s(): temp "
265 "sense override non-SISO "
270 (wlc->bandstate[i]->mrspec_override) !=
271 PHY_TXC1_MODE_SISO) {
272 wlc->bandstate[i]->mrspec_override = 0;
273 wiphy_err(wlc->wiphy, "%s(): temp "
274 "sense override non-SISO "
281 wlc->stf->txchain = txchain;
282 wlc->stf->txstreams = txstreams;
283 wlc_stf_stbc_tx_set(wlc, wlc->band->band_stf_stbc_tx);
284 wlc_stf_ss_update(wlc, wlc->bandstate[BAND_2G_INDEX]);
285 wlc_stf_ss_update(wlc, wlc->bandstate[BAND_5G_INDEX]);
287 (wlc->stf->txstreams == 1) ? ANT_TX_FORCE_0 : ANT_TX_DEF;
288 _wlc_stf_phy_txant_upd(wlc);
290 wlc_phy_stf_chain_set(wlc->band->pi, wlc->stf->txchain,
293 for (i = 1; i <= MAX_STREAMS_SUPPORTED; i++)
294 wlc_stf_txcore_set(wlc, (u8) i, txcore_default[i]);
299 /* update wlc->stf->ss_opmode which represents the operational stf_ss mode we're using */
300 int wlc_stf_ss_update(struct wlc_info *wlc, struct wlcband *band)
306 prev_stf_ss = wlc->stf->ss_opmode;
308 /* NOTE: opmode can only be SISO or CDD as STBC is decided on a per-packet basis */
309 if (WLC_STBC_CAP_PHY(wlc) &&
310 wlc->stf->ss_algosel_auto
311 && (wlc->stf->ss_algo_channel != (u16) -1)) {
312 upd_stf_ss = (wlc->stf->no_cddstbc || (wlc->stf->txstreams == 1)
313 || isset(&wlc->stf->ss_algo_channel,
314 PHY_TXC1_MODE_SISO)) ? PHY_TXC1_MODE_SISO
317 if (wlc->band != band)
319 upd_stf_ss = (wlc->stf->no_cddstbc
320 || (wlc->stf->txstreams ==
321 1)) ? PHY_TXC1_MODE_SISO : band->
324 if (prev_stf_ss != upd_stf_ss) {
325 wlc->stf->ss_opmode = upd_stf_ss;
326 wlc_bmac_band_stf_ss_set(wlc->hw, upd_stf_ss);
332 int wlc_stf_attach(struct wlc_info *wlc)
334 wlc->bandstate[BAND_2G_INDEX]->band_stf_ss_mode = PHY_TXC1_MODE_SISO;
335 wlc->bandstate[BAND_5G_INDEX]->band_stf_ss_mode = PHY_TXC1_MODE_CDD;
337 if (WLCISNPHY(wlc->band) &&
338 (wlc_phy_txpower_hw_ctrl_get(wlc->band->pi) != PHY_TPC_HW_ON))
339 wlc->bandstate[BAND_2G_INDEX]->band_stf_ss_mode =
341 wlc_stf_ss_update(wlc, wlc->bandstate[BAND_2G_INDEX]);
342 wlc_stf_ss_update(wlc, wlc->bandstate[BAND_5G_INDEX]);
344 wlc_stf_stbc_rx_ht_update(wlc, HT_CAP_RX_STBC_NO);
345 wlc->bandstate[BAND_2G_INDEX]->band_stf_stbc_tx = OFF;
346 wlc->bandstate[BAND_5G_INDEX]->band_stf_stbc_tx = OFF;
348 if (WLC_STBC_CAP_PHY(wlc)) {
349 wlc->stf->ss_algosel_auto = true;
350 wlc->stf->ss_algo_channel = (u16) -1; /* Init the default value */
355 void wlc_stf_detach(struct wlc_info *wlc)
360 * Centralized txant update function. call it whenever wlc->stf->txant and/or wlc->stf->txchain
363 * Antennas are controlled by ucode indirectly, which drives PHY or GPIO to
364 * achieve various tx/rx antenna selection schemes
366 * legacy phy, bit 6 and bit 7 means antenna 0 and 1 respectively, bit6+bit7 means auto(last rx)
367 * for NREV<3, bit 6 and bit 7 means antenna 0 and 1 respectively, bit6+bit7 means last rx and
368 * do tx-antenna selection for SISO transmissions
369 * for NREV=3, bit 6 and bit _8_ means antenna 0 and 1 respectively, bit6+bit7 means last rx and
370 * do tx-antenna selection for SISO transmissions
371 * for NREV>=7, bit 6 and bit 7 mean antenna 0 and 1 respectively, nit6+bit7 means both cores active
373 static void _wlc_stf_phy_txant_upd(struct wlc_info *wlc)
377 txant = (s8) wlc->stf->txant;
378 if (WLC_PHY_11N_CAP(wlc->band)) {
379 if (txant == ANT_TX_FORCE_0) {
380 wlc->stf->phytxant = PHY_TXC_ANT_0;
381 } else if (txant == ANT_TX_FORCE_1) {
382 wlc->stf->phytxant = PHY_TXC_ANT_1;
384 if (WLCISNPHY(wlc->band) &&
385 NREV_GE(wlc->band->phyrev, 3)
386 && NREV_LT(wlc->band->phyrev, 7)) {
387 wlc->stf->phytxant = PHY_TXC_ANT_2;
390 if (WLCISLCNPHY(wlc->band) || WLCISSSLPNPHY(wlc->band))
391 wlc->stf->phytxant = PHY_TXC_LCNPHY_ANT_LAST;
393 /* catch out of sync wlc->stf->txcore */
394 WARN_ON(wlc->stf->txchain <= 0);
396 wlc->stf->txchain << PHY_TXC_ANT_SHIFT;
400 if (txant == ANT_TX_FORCE_0)
401 wlc->stf->phytxant = PHY_TXC_OLD_ANT_0;
402 else if (txant == ANT_TX_FORCE_1)
403 wlc->stf->phytxant = PHY_TXC_OLD_ANT_1;
405 wlc->stf->phytxant = PHY_TXC_OLD_ANT_LAST;
408 wlc_bmac_txant_set(wlc->hw, wlc->stf->phytxant);
411 void wlc_stf_phy_txant_upd(struct wlc_info *wlc)
413 _wlc_stf_phy_txant_upd(wlc);
416 void wlc_stf_phy_chain_calc(struct wlc_info *wlc)
418 /* get available rx/tx chains */
419 wlc->stf->hw_txchain = (u8) getintvar(wlc->pub->vars, "txchain");
420 wlc->stf->hw_rxchain = (u8) getintvar(wlc->pub->vars, "rxchain");
422 /* these parameter are intended to be used for all PHY types */
423 if (wlc->stf->hw_txchain == 0 || wlc->stf->hw_txchain == 0xf) {
424 if (WLCISNPHY(wlc->band)) {
425 wlc->stf->hw_txchain = TXCHAIN_DEF_NPHY;
427 wlc->stf->hw_txchain = TXCHAIN_DEF;
431 wlc->stf->txchain = wlc->stf->hw_txchain;
432 wlc->stf->txstreams = (u8) WLC_BITSCNT(wlc->stf->hw_txchain);
434 if (wlc->stf->hw_rxchain == 0 || wlc->stf->hw_rxchain == 0xf) {
435 if (WLCISNPHY(wlc->band)) {
436 wlc->stf->hw_rxchain = RXCHAIN_DEF_NPHY;
438 wlc->stf->hw_rxchain = RXCHAIN_DEF;
442 wlc->stf->rxchain = wlc->stf->hw_rxchain;
443 wlc->stf->rxstreams = (u8) WLC_BITSCNT(wlc->stf->hw_rxchain);
445 /* initialize the txcore table */
446 memcpy(wlc->stf->txcore, txcore_default, sizeof(wlc->stf->txcore));
448 /* default spatial_policy */
449 wlc->stf->spatial_policy = MIN_SPATIAL_EXPANSION;
450 wlc_stf_spatial_policy_set(wlc, MIN_SPATIAL_EXPANSION);
453 static u16 _wlc_stf_phytxchain_sel(struct wlc_info *wlc, ratespec_t rspec)
455 u16 phytxant = wlc->stf->phytxant;
457 if (RSPEC_STF(rspec) != PHY_TXC1_MODE_SISO) {
458 phytxant = wlc->stf->txchain << PHY_TXC_ANT_SHIFT;
459 } else if (wlc->stf->txant == ANT_TX_DEF)
460 phytxant = wlc->stf->txchain << PHY_TXC_ANT_SHIFT;
461 phytxant &= PHY_TXC_ANT_MASK;
465 u16 wlc_stf_phytxchain_sel(struct wlc_info *wlc, ratespec_t rspec)
467 return _wlc_stf_phytxchain_sel(wlc, rspec);
470 u16 wlc_stf_d11hdrs_phyctl_txant(struct wlc_info *wlc, ratespec_t rspec)
472 u16 phytxant = wlc->stf->phytxant;
473 u16 mask = PHY_TXC_ANT_MASK;
475 /* for non-siso rates or default setting, use the available chains */
476 if (WLCISNPHY(wlc->band)) {
477 phytxant = _wlc_stf_phytxchain_sel(wlc, rspec);
478 mask = PHY_TXC_HTANT_MASK;
480 phytxant |= phytxant & mask;