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>
32 #include "phy/phy_hal.h"
35 #include "bottom_mac.h"
38 #define MIN_SPATIAL_EXPANSION 0
39 #define MAX_SPATIAL_EXPANSION 1
41 #define WLC_STF_SS_STBC_RX(wlc) (WLCISNPHY(wlc->band) && \
42 NREV_GT(wlc->band->phyrev, 3) && NREV_LE(wlc->band->phyrev, 6))
44 static bool wlc_stf_stbc_tx_set(struct wlc_info *wlc, s32 int_val);
45 static int wlc_stf_txcore_set(struct wlc_info *wlc, u8 Nsts, u8 val);
46 static int wlc_stf_spatial_policy_set(struct wlc_info *wlc, int val);
47 static void wlc_stf_stbc_rx_ht_update(struct wlc_info *wlc, int val);
49 static void _wlc_stf_phy_txant_upd(struct wlc_info *wlc);
50 static u16 _wlc_stf_phytxchain_sel(struct wlc_info *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(struct wlc_info *wlc, int val)
66 /* MIMOPHYs rev3-6 cannot receive STBC with only one rx core active */
67 if (WLC_STF_SS_STBC_RX(wlc)) {
68 if ((wlc->stf->rxstreams == 1) && (val != HT_CAP_RX_STBC_NO))
72 wlc->ht_cap.cap_info &= ~IEEE80211_HT_CAP_RX_STBC;
73 wlc->ht_cap.cap_info |= (val << IEEE80211_HT_CAP_RX_STBC_SHIFT);
76 wlc_update_beacon(wlc);
77 wlc_update_probe_resp(wlc, true);
81 /* every WLC_TEMPSENSE_PERIOD seconds temperature check to decide whether to turn on/off txchain */
82 void wlc_tempsense_upd(struct wlc_info *wlc)
84 wlc_phy_t *pi = wlc->band->pi;
85 uint active_chains, txchain;
87 /* Check if the chip is too hot. Disable one Tx chain, if it is */
88 /* high 4 bits are for Rx chain, low 4 bits are for Tx chain */
89 active_chains = wlc_phy_stf_chain_active_get(pi);
90 txchain = active_chains & 0xf;
92 if (wlc->stf->txchain == wlc->stf->hw_txchain) {
93 if (txchain && (txchain < wlc->stf->hw_txchain)) {
94 /* turn off 1 tx chain */
95 wlc_stf_txchain_set(wlc, txchain, true);
97 } else if (wlc->stf->txchain < wlc->stf->hw_txchain) {
98 if (txchain == wlc->stf->hw_txchain) {
99 /* turn back on txchain */
100 wlc_stf_txchain_set(wlc, txchain, true);
106 wlc_stf_ss_algo_channel_get(struct wlc_info *wlc, u16 *ss_algo_channel,
110 u8 siso_mcs_id, cdd_mcs_id, stbc_mcs_id;
112 /* Clear previous settings */
113 *ss_algo_channel = 0;
116 *ss_algo_channel = (u16) -1;
120 wlc_phy_txpower_get_current(wlc->band->pi, &power,
121 CHSPEC_CHANNEL(chanspec));
123 siso_mcs_id = (CHSPEC_IS40(chanspec)) ?
124 WL_TX_POWER_MCS40_SISO_FIRST : WL_TX_POWER_MCS20_SISO_FIRST;
125 cdd_mcs_id = (CHSPEC_IS40(chanspec)) ?
126 WL_TX_POWER_MCS40_CDD_FIRST : WL_TX_POWER_MCS20_CDD_FIRST;
127 stbc_mcs_id = (CHSPEC_IS40(chanspec)) ?
128 WL_TX_POWER_MCS40_STBC_FIRST : WL_TX_POWER_MCS20_STBC_FIRST;
130 /* criteria to choose stf mode */
132 /* the "+3dbm (12 0.25db units)" is to account for the fact that with CDD, tx occurs
135 if (power.target[siso_mcs_id] > (power.target[cdd_mcs_id] + 12))
136 setbit(ss_algo_channel, PHY_TXC1_MODE_SISO);
138 setbit(ss_algo_channel, PHY_TXC1_MODE_CDD);
140 /* STBC is ORed into to algo channel as STBC requires per-packet SCB capability check
141 * so cannot be default mode of operation. One of SISO, CDD have to be set
143 if (power.target[siso_mcs_id] <= (power.target[stbc_mcs_id] + 12))
144 setbit(ss_algo_channel, PHY_TXC1_MODE_STBC);
147 static bool wlc_stf_stbc_tx_set(struct wlc_info *wlc, s32 int_val)
149 if ((int_val != AUTO) && (int_val != OFF) && (int_val != ON)) {
153 if ((int_val == ON) && (wlc->stf->txstreams == 1))
156 if ((int_val == OFF) || (wlc->stf->txstreams == 1)
157 || !WLC_STBC_CAP_PHY(wlc))
158 wlc->ht_cap.cap_info &= ~IEEE80211_HT_CAP_TX_STBC;
160 wlc->ht_cap.cap_info |= IEEE80211_HT_CAP_TX_STBC;
162 wlc->bandstate[BAND_2G_INDEX]->band_stf_stbc_tx = (s8) int_val;
163 wlc->bandstate[BAND_5G_INDEX]->band_stf_stbc_tx = (s8) int_val;
168 bool wlc_stf_stbc_rx_set(struct wlc_info *wlc, s32 int_val)
170 if ((int_val != HT_CAP_RX_STBC_NO)
171 && (int_val != HT_CAP_RX_STBC_ONE_STREAM)) {
175 if (WLC_STF_SS_STBC_RX(wlc)) {
176 if ((int_val != HT_CAP_RX_STBC_NO)
177 && (wlc->stf->rxstreams == 1))
181 wlc_stf_stbc_rx_ht_update(wlc, int_val);
185 static int wlc_stf_txcore_set(struct wlc_info *wlc, u8 Nsts, u8 core_mask)
187 BCMMSG(wlc->wiphy, "wl%d: Nsts %d core_mask %x\n",
188 wlc->pub->unit, Nsts, core_mask);
190 if (WLC_BITSCNT(core_mask) > wlc->stf->txstreams) {
194 if ((WLC_BITSCNT(core_mask) == wlc->stf->txstreams) &&
195 ((core_mask & ~wlc->stf->txchain)
196 || !(core_mask & wlc->stf->txchain))) {
197 core_mask = wlc->stf->txchain;
200 wlc->stf->txcore[Nsts] = core_mask;
201 /* Nsts = 1..4, txcore index = 1..4 */
203 /* Needs to update beacon and ucode generated response
204 * frames when 1 stream core map changed
206 wlc->stf->phytxant = core_mask << PHY_TXC_ANT_SHIFT;
207 wlc_bmac_txant_set(wlc->hw, wlc->stf->phytxant);
209 wlc_suspend_mac_and_wait(wlc);
210 wlc_beacon_phytxctl_txant_upd(wlc, wlc->bcn_rspec);
218 static int wlc_stf_spatial_policy_set(struct wlc_info *wlc, int val)
223 BCMMSG(wlc->wiphy, "wl%d: val %x\n", wlc->pub->unit, val);
225 wlc->stf->spatial_policy = (s8) val;
226 for (i = 1; i <= MAX_STREAMS_SUPPORTED; i++) {
227 core_mask = (val == MAX_SPATIAL_EXPANSION) ?
228 wlc->stf->txchain : txcore_default[i];
229 wlc_stf_txcore_set(wlc, (u8) i, core_mask);
234 int wlc_stf_txchain_set(struct wlc_info *wlc, s32 int_val, bool force)
236 u8 txchain = (u8) int_val;
240 if (wlc->stf->txchain == txchain)
243 if ((txchain & ~wlc->stf->hw_txchain)
244 || !(txchain & wlc->stf->hw_txchain))
247 /* if nrate override is configured to be non-SISO STF mode, reject reducing txchain to 1 */
248 txstreams = (u8) WLC_BITSCNT(txchain);
249 if (txstreams > MAX_STREAMS_SUPPORTED)
252 if (txstreams == 1) {
253 for (i = 0; i < NBANDS(wlc); i++)
254 if ((RSPEC_STF(wlc->bandstate[i]->rspec_override) !=
256 || (RSPEC_STF(wlc->bandstate[i]->mrspec_override) !=
257 PHY_TXC1_MODE_SISO)) {
261 /* over-write the override rspec */
262 if (RSPEC_STF(wlc->bandstate[i]->rspec_override)
263 != PHY_TXC1_MODE_SISO) {
264 wlc->bandstate[i]->rspec_override = 0;
265 wiphy_err(wlc->wiphy, "%s(): temp "
266 "sense override non-SISO "
271 (wlc->bandstate[i]->mrspec_override) !=
272 PHY_TXC1_MODE_SISO) {
273 wlc->bandstate[i]->mrspec_override = 0;
274 wiphy_err(wlc->wiphy, "%s(): temp "
275 "sense override non-SISO "
282 wlc->stf->txchain = txchain;
283 wlc->stf->txstreams = txstreams;
284 wlc_stf_stbc_tx_set(wlc, wlc->band->band_stf_stbc_tx);
285 wlc_stf_ss_update(wlc, wlc->bandstate[BAND_2G_INDEX]);
286 wlc_stf_ss_update(wlc, wlc->bandstate[BAND_5G_INDEX]);
288 (wlc->stf->txstreams == 1) ? ANT_TX_FORCE_0 : ANT_TX_DEF;
289 _wlc_stf_phy_txant_upd(wlc);
291 wlc_phy_stf_chain_set(wlc->band->pi, wlc->stf->txchain,
294 for (i = 1; i <= MAX_STREAMS_SUPPORTED; i++)
295 wlc_stf_txcore_set(wlc, (u8) i, txcore_default[i]);
300 /* update wlc->stf->ss_opmode which represents the operational stf_ss mode we're using */
301 int wlc_stf_ss_update(struct wlc_info *wlc, struct wlcband *band)
307 prev_stf_ss = wlc->stf->ss_opmode;
309 /* NOTE: opmode can only be SISO or CDD as STBC is decided on a per-packet basis */
310 if (WLC_STBC_CAP_PHY(wlc) &&
311 wlc->stf->ss_algosel_auto
312 && (wlc->stf->ss_algo_channel != (u16) -1)) {
313 upd_stf_ss = (wlc->stf->no_cddstbc || (wlc->stf->txstreams == 1)
314 || isset(&wlc->stf->ss_algo_channel,
315 PHY_TXC1_MODE_SISO)) ? PHY_TXC1_MODE_SISO
318 if (wlc->band != band)
320 upd_stf_ss = (wlc->stf->no_cddstbc
321 || (wlc->stf->txstreams ==
322 1)) ? PHY_TXC1_MODE_SISO : band->
325 if (prev_stf_ss != upd_stf_ss) {
326 wlc->stf->ss_opmode = upd_stf_ss;
327 wlc_bmac_band_stf_ss_set(wlc->hw, upd_stf_ss);
333 int wlc_stf_attach(struct wlc_info *wlc)
335 wlc->bandstate[BAND_2G_INDEX]->band_stf_ss_mode = PHY_TXC1_MODE_SISO;
336 wlc->bandstate[BAND_5G_INDEX]->band_stf_ss_mode = PHY_TXC1_MODE_CDD;
338 if (WLCISNPHY(wlc->band) &&
339 (wlc_phy_txpower_hw_ctrl_get(wlc->band->pi) != PHY_TPC_HW_ON))
340 wlc->bandstate[BAND_2G_INDEX]->band_stf_ss_mode =
342 wlc_stf_ss_update(wlc, wlc->bandstate[BAND_2G_INDEX]);
343 wlc_stf_ss_update(wlc, wlc->bandstate[BAND_5G_INDEX]);
345 wlc_stf_stbc_rx_ht_update(wlc, HT_CAP_RX_STBC_NO);
346 wlc->bandstate[BAND_2G_INDEX]->band_stf_stbc_tx = OFF;
347 wlc->bandstate[BAND_5G_INDEX]->band_stf_stbc_tx = OFF;
349 if (WLC_STBC_CAP_PHY(wlc)) {
350 wlc->stf->ss_algosel_auto = true;
351 wlc->stf->ss_algo_channel = (u16) -1; /* Init the default value */
356 void wlc_stf_detach(struct wlc_info *wlc)
361 * Centralized txant update function. call it whenever wlc->stf->txant and/or wlc->stf->txchain
364 * Antennas are controlled by ucode indirectly, which drives PHY or GPIO to
365 * achieve various tx/rx antenna selection schemes
367 * legacy phy, bit 6 and bit 7 means antenna 0 and 1 respectively, bit6+bit7 means auto(last rx)
368 * for NREV<3, bit 6 and bit 7 means antenna 0 and 1 respectively, bit6+bit7 means last rx and
369 * do tx-antenna selection for SISO transmissions
370 * for NREV=3, bit 6 and bit _8_ means antenna 0 and 1 respectively, bit6+bit7 means last rx and
371 * do tx-antenna selection for SISO transmissions
372 * for NREV>=7, bit 6 and bit 7 mean antenna 0 and 1 respectively, nit6+bit7 means both cores active
374 static void _wlc_stf_phy_txant_upd(struct wlc_info *wlc)
378 txant = (s8) wlc->stf->txant;
379 if (WLC_PHY_11N_CAP(wlc->band)) {
380 if (txant == ANT_TX_FORCE_0) {
381 wlc->stf->phytxant = PHY_TXC_ANT_0;
382 } else if (txant == ANT_TX_FORCE_1) {
383 wlc->stf->phytxant = PHY_TXC_ANT_1;
385 if (WLCISNPHY(wlc->band) &&
386 NREV_GE(wlc->band->phyrev, 3)
387 && NREV_LT(wlc->band->phyrev, 7)) {
388 wlc->stf->phytxant = PHY_TXC_ANT_2;
391 if (WLCISLCNPHY(wlc->band) || WLCISSSLPNPHY(wlc->band))
392 wlc->stf->phytxant = PHY_TXC_LCNPHY_ANT_LAST;
394 /* catch out of sync wlc->stf->txcore */
395 WARN_ON(wlc->stf->txchain <= 0);
397 wlc->stf->txchain << PHY_TXC_ANT_SHIFT;
401 if (txant == ANT_TX_FORCE_0)
402 wlc->stf->phytxant = PHY_TXC_OLD_ANT_0;
403 else if (txant == ANT_TX_FORCE_1)
404 wlc->stf->phytxant = PHY_TXC_OLD_ANT_1;
406 wlc->stf->phytxant = PHY_TXC_OLD_ANT_LAST;
409 wlc_bmac_txant_set(wlc->hw, wlc->stf->phytxant);
412 void wlc_stf_phy_txant_upd(struct wlc_info *wlc)
414 _wlc_stf_phy_txant_upd(wlc);
417 void wlc_stf_phy_chain_calc(struct wlc_info *wlc)
419 /* get available rx/tx chains */
420 wlc->stf->hw_txchain = (u8) getintvar(wlc->pub->vars, "txchain");
421 wlc->stf->hw_rxchain = (u8) getintvar(wlc->pub->vars, "rxchain");
423 /* these parameter are intended to be used for all PHY types */
424 if (wlc->stf->hw_txchain == 0 || wlc->stf->hw_txchain == 0xf) {
425 if (WLCISNPHY(wlc->band)) {
426 wlc->stf->hw_txchain = TXCHAIN_DEF_NPHY;
428 wlc->stf->hw_txchain = TXCHAIN_DEF;
432 wlc->stf->txchain = wlc->stf->hw_txchain;
433 wlc->stf->txstreams = (u8) WLC_BITSCNT(wlc->stf->hw_txchain);
435 if (wlc->stf->hw_rxchain == 0 || wlc->stf->hw_rxchain == 0xf) {
436 if (WLCISNPHY(wlc->band)) {
437 wlc->stf->hw_rxchain = RXCHAIN_DEF_NPHY;
439 wlc->stf->hw_rxchain = RXCHAIN_DEF;
443 wlc->stf->rxchain = wlc->stf->hw_rxchain;
444 wlc->stf->rxstreams = (u8) WLC_BITSCNT(wlc->stf->hw_rxchain);
446 /* initialize the txcore table */
447 memcpy(wlc->stf->txcore, txcore_default, sizeof(wlc->stf->txcore));
449 /* default spatial_policy */
450 wlc->stf->spatial_policy = MIN_SPATIAL_EXPANSION;
451 wlc_stf_spatial_policy_set(wlc, MIN_SPATIAL_EXPANSION);
454 static u16 _wlc_stf_phytxchain_sel(struct wlc_info *wlc, ratespec_t rspec)
456 u16 phytxant = wlc->stf->phytxant;
458 if (RSPEC_STF(rspec) != PHY_TXC1_MODE_SISO) {
459 phytxant = wlc->stf->txchain << PHY_TXC_ANT_SHIFT;
460 } else if (wlc->stf->txant == ANT_TX_DEF)
461 phytxant = wlc->stf->txchain << PHY_TXC_ANT_SHIFT;
462 phytxant &= PHY_TXC_ANT_MASK;
466 u16 wlc_stf_phytxchain_sel(struct wlc_info *wlc, ratespec_t rspec)
468 return _wlc_stf_phytxchain_sel(wlc, rspec);
471 u16 wlc_stf_d11hdrs_phyctl_txant(struct wlc_info *wlc, ratespec_t rspec)
473 u16 phytxant = wlc->stf->phytxant;
474 u16 mask = PHY_TXC_ANT_MASK;
476 /* for non-siso rates or default setting, use the available chains */
477 if (WLCISNPHY(wlc->band)) {
478 phytxant = _wlc_stf_phytxchain_sel(wlc, rspec);
479 mask = PHY_TXC_HTANT_MASK;
481 phytxant |= phytxant & mask;