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>
29 #include "wlc_types.h"
37 #include "phy/wlc_phy_hal.h"
38 #include "wlc_channel.h"
40 #include "wl_export.h"
44 #define MIN_SPATIAL_EXPANSION 0
45 #define MAX_SPATIAL_EXPANSION 1
47 #define WLC_STF_SS_STBC_RX(wlc) (WLCISNPHY(wlc->band) && \
48 NREV_GT(wlc->band->phyrev, 3) && NREV_LE(wlc->band->phyrev, 6))
50 static bool wlc_stf_stbc_tx_set(struct wlc_info *wlc, s32 int_val);
51 static int wlc_stf_txcore_set(struct wlc_info *wlc, u8 Nsts, u8 val);
52 static int wlc_stf_spatial_policy_set(struct wlc_info *wlc, int val);
53 static void wlc_stf_stbc_rx_ht_update(struct wlc_info *wlc, int val);
55 static void _wlc_stf_phy_txant_upd(struct wlc_info *wlc);
56 static u16 _wlc_stf_phytxchain_sel(struct wlc_info *wlc, ratespec_t rspec);
62 const u8 txcore_default[5] = {
63 (0), /* bitmap of the core enabled */
64 (0x01), /* For Nsts = 1, enable core 1 */
65 (0x03), /* For Nsts = 2, enable core 1 & 2 */
66 (0x07), /* For Nsts = 3, enable core 1, 2 & 3 */
67 (0x0f) /* For Nsts = 4, enable all cores */
70 static void wlc_stf_stbc_rx_ht_update(struct wlc_info *wlc, int val)
72 /* MIMOPHYs rev3-6 cannot receive STBC with only one rx core active */
73 if (WLC_STF_SS_STBC_RX(wlc)) {
74 if ((wlc->stf->rxstreams == 1) && (val != HT_CAP_RX_STBC_NO))
78 wlc->ht_cap.cap_info &= ~IEEE80211_HT_CAP_RX_STBC;
79 wlc->ht_cap.cap_info |= (val << IEEE80211_HT_CAP_RX_STBC_SHIFT);
82 wlc_update_beacon(wlc);
83 wlc_update_probe_resp(wlc, true);
87 /* every WLC_TEMPSENSE_PERIOD seconds temperature check to decide whether to turn on/off txchain */
88 void wlc_tempsense_upd(struct wlc_info *wlc)
90 wlc_phy_t *pi = wlc->band->pi;
91 uint active_chains, txchain;
93 /* Check if the chip is too hot. Disable one Tx chain, if it is */
94 /* high 4 bits are for Rx chain, low 4 bits are for Tx chain */
95 active_chains = wlc_phy_stf_chain_active_get(pi);
96 txchain = active_chains & 0xf;
98 if (wlc->stf->txchain == wlc->stf->hw_txchain) {
99 if (txchain && (txchain < wlc->stf->hw_txchain)) {
100 /* turn off 1 tx chain */
101 wlc_stf_txchain_set(wlc, txchain, true);
103 } else if (wlc->stf->txchain < wlc->stf->hw_txchain) {
104 if (txchain == wlc->stf->hw_txchain) {
105 /* turn back on txchain */
106 wlc_stf_txchain_set(wlc, txchain, true);
112 wlc_stf_ss_algo_channel_get(struct wlc_info *wlc, u16 *ss_algo_channel,
116 u8 siso_mcs_id, cdd_mcs_id, stbc_mcs_id;
118 /* Clear previous settings */
119 *ss_algo_channel = 0;
122 *ss_algo_channel = (u16) -1;
126 wlc_phy_txpower_get_current(wlc->band->pi, &power,
127 CHSPEC_CHANNEL(chanspec));
129 siso_mcs_id = (CHSPEC_IS40(chanspec)) ?
130 WL_TX_POWER_MCS40_SISO_FIRST : WL_TX_POWER_MCS20_SISO_FIRST;
131 cdd_mcs_id = (CHSPEC_IS40(chanspec)) ?
132 WL_TX_POWER_MCS40_CDD_FIRST : WL_TX_POWER_MCS20_CDD_FIRST;
133 stbc_mcs_id = (CHSPEC_IS40(chanspec)) ?
134 WL_TX_POWER_MCS40_STBC_FIRST : WL_TX_POWER_MCS20_STBC_FIRST;
136 /* criteria to choose stf mode */
138 /* the "+3dbm (12 0.25db units)" is to account for the fact that with CDD, tx occurs
141 if (power.target[siso_mcs_id] > (power.target[cdd_mcs_id] + 12))
142 setbit(ss_algo_channel, PHY_TXC1_MODE_SISO);
144 setbit(ss_algo_channel, PHY_TXC1_MODE_CDD);
146 /* STBC is ORed into to algo channel as STBC requires per-packet SCB capability check
147 * so cannot be default mode of operation. One of SISO, CDD have to be set
149 if (power.target[siso_mcs_id] <= (power.target[stbc_mcs_id] + 12))
150 setbit(ss_algo_channel, PHY_TXC1_MODE_STBC);
153 static bool wlc_stf_stbc_tx_set(struct wlc_info *wlc, s32 int_val)
155 if ((int_val != AUTO) && (int_val != OFF) && (int_val != ON)) {
159 if ((int_val == ON) && (wlc->stf->txstreams == 1))
162 if ((int_val == OFF) || (wlc->stf->txstreams == 1)
163 || !WLC_STBC_CAP_PHY(wlc))
164 wlc->ht_cap.cap_info &= ~IEEE80211_HT_CAP_TX_STBC;
166 wlc->ht_cap.cap_info |= IEEE80211_HT_CAP_TX_STBC;
168 wlc->bandstate[BAND_2G_INDEX]->band_stf_stbc_tx = (s8) int_val;
169 wlc->bandstate[BAND_5G_INDEX]->band_stf_stbc_tx = (s8) int_val;
174 bool wlc_stf_stbc_rx_set(struct wlc_info *wlc, s32 int_val)
176 if ((int_val != HT_CAP_RX_STBC_NO)
177 && (int_val != HT_CAP_RX_STBC_ONE_STREAM)) {
181 if (WLC_STF_SS_STBC_RX(wlc)) {
182 if ((int_val != HT_CAP_RX_STBC_NO)
183 && (wlc->stf->rxstreams == 1))
187 wlc_stf_stbc_rx_ht_update(wlc, int_val);
191 static int wlc_stf_txcore_set(struct wlc_info *wlc, u8 Nsts, u8 core_mask)
193 BCMMSG(wlc->wiphy, "wl%d: Nsts %d core_mask %x\n",
194 wlc->pub->unit, Nsts, core_mask);
196 if (WLC_BITSCNT(core_mask) > wlc->stf->txstreams) {
200 if ((WLC_BITSCNT(core_mask) == wlc->stf->txstreams) &&
201 ((core_mask & ~wlc->stf->txchain)
202 || !(core_mask & wlc->stf->txchain))) {
203 core_mask = wlc->stf->txchain;
206 wlc->stf->txcore[Nsts] = core_mask;
207 /* Nsts = 1..4, txcore index = 1..4 */
209 /* Needs to update beacon and ucode generated response
210 * frames when 1 stream core map changed
212 wlc->stf->phytxant = core_mask << PHY_TXC_ANT_SHIFT;
213 wlc_bmac_txant_set(wlc->hw, wlc->stf->phytxant);
215 wlc_suspend_mac_and_wait(wlc);
216 wlc_beacon_phytxctl_txant_upd(wlc, wlc->bcn_rspec);
224 static int wlc_stf_spatial_policy_set(struct wlc_info *wlc, int val)
229 BCMMSG(wlc->wiphy, "wl%d: val %x\n", wlc->pub->unit, val);
231 wlc->stf->spatial_policy = (s8) val;
232 for (i = 1; i <= MAX_STREAMS_SUPPORTED; i++) {
233 core_mask = (val == MAX_SPATIAL_EXPANSION) ?
234 wlc->stf->txchain : txcore_default[i];
235 wlc_stf_txcore_set(wlc, (u8) i, core_mask);
240 int wlc_stf_txchain_set(struct wlc_info *wlc, s32 int_val, bool force)
242 u8 txchain = (u8) int_val;
246 if (wlc->stf->txchain == txchain)
249 if ((txchain & ~wlc->stf->hw_txchain)
250 || !(txchain & wlc->stf->hw_txchain))
253 /* if nrate override is configured to be non-SISO STF mode, reject reducing txchain to 1 */
254 txstreams = (u8) WLC_BITSCNT(txchain);
255 if (txstreams > MAX_STREAMS_SUPPORTED)
258 if (txstreams == 1) {
259 for (i = 0; i < NBANDS(wlc); i++)
260 if ((RSPEC_STF(wlc->bandstate[i]->rspec_override) !=
262 || (RSPEC_STF(wlc->bandstate[i]->mrspec_override) !=
263 PHY_TXC1_MODE_SISO)) {
267 /* over-write the override rspec */
268 if (RSPEC_STF(wlc->bandstate[i]->rspec_override)
269 != PHY_TXC1_MODE_SISO) {
270 wlc->bandstate[i]->rspec_override = 0;
271 wiphy_err(wlc->wiphy, "%s(): temp "
272 "sense override non-SISO "
277 (wlc->bandstate[i]->mrspec_override) !=
278 PHY_TXC1_MODE_SISO) {
279 wlc->bandstate[i]->mrspec_override = 0;
280 wiphy_err(wlc->wiphy, "%s(): temp "
281 "sense override non-SISO "
288 wlc->stf->txchain = txchain;
289 wlc->stf->txstreams = txstreams;
290 wlc_stf_stbc_tx_set(wlc, wlc->band->band_stf_stbc_tx);
291 wlc_stf_ss_update(wlc, wlc->bandstate[BAND_2G_INDEX]);
292 wlc_stf_ss_update(wlc, wlc->bandstate[BAND_5G_INDEX]);
294 (wlc->stf->txstreams == 1) ? ANT_TX_FORCE_0 : ANT_TX_DEF;
295 _wlc_stf_phy_txant_upd(wlc);
297 wlc_phy_stf_chain_set(wlc->band->pi, wlc->stf->txchain,
300 for (i = 1; i <= MAX_STREAMS_SUPPORTED; i++)
301 wlc_stf_txcore_set(wlc, (u8) i, txcore_default[i]);
306 /* update wlc->stf->ss_opmode which represents the operational stf_ss mode we're using */
307 int wlc_stf_ss_update(struct wlc_info *wlc, struct wlcband *band)
313 prev_stf_ss = wlc->stf->ss_opmode;
315 /* NOTE: opmode can only be SISO or CDD as STBC is decided on a per-packet basis */
316 if (WLC_STBC_CAP_PHY(wlc) &&
317 wlc->stf->ss_algosel_auto
318 && (wlc->stf->ss_algo_channel != (u16) -1)) {
319 upd_stf_ss = (wlc->stf->no_cddstbc || (wlc->stf->txstreams == 1)
320 || isset(&wlc->stf->ss_algo_channel,
321 PHY_TXC1_MODE_SISO)) ? PHY_TXC1_MODE_SISO
324 if (wlc->band != band)
326 upd_stf_ss = (wlc->stf->no_cddstbc
327 || (wlc->stf->txstreams ==
328 1)) ? PHY_TXC1_MODE_SISO : band->
331 if (prev_stf_ss != upd_stf_ss) {
332 wlc->stf->ss_opmode = upd_stf_ss;
333 wlc_bmac_band_stf_ss_set(wlc->hw, upd_stf_ss);
339 int wlc_stf_attach(struct wlc_info *wlc)
341 wlc->bandstate[BAND_2G_INDEX]->band_stf_ss_mode = PHY_TXC1_MODE_SISO;
342 wlc->bandstate[BAND_5G_INDEX]->band_stf_ss_mode = PHY_TXC1_MODE_CDD;
344 if (WLCISNPHY(wlc->band) &&
345 (wlc_phy_txpower_hw_ctrl_get(wlc->band->pi) != PHY_TPC_HW_ON))
346 wlc->bandstate[BAND_2G_INDEX]->band_stf_ss_mode =
348 wlc_stf_ss_update(wlc, wlc->bandstate[BAND_2G_INDEX]);
349 wlc_stf_ss_update(wlc, wlc->bandstate[BAND_5G_INDEX]);
351 wlc_stf_stbc_rx_ht_update(wlc, HT_CAP_RX_STBC_NO);
352 wlc->bandstate[BAND_2G_INDEX]->band_stf_stbc_tx = OFF;
353 wlc->bandstate[BAND_5G_INDEX]->band_stf_stbc_tx = OFF;
355 if (WLC_STBC_CAP_PHY(wlc)) {
356 wlc->stf->ss_algosel_auto = true;
357 wlc->stf->ss_algo_channel = (u16) -1; /* Init the default value */
362 void wlc_stf_detach(struct wlc_info *wlc)
367 * Centralized txant update function. call it whenever wlc->stf->txant and/or wlc->stf->txchain
370 * Antennas are controlled by ucode indirectly, which drives PHY or GPIO to
371 * achieve various tx/rx antenna selection schemes
373 * legacy phy, bit 6 and bit 7 means antenna 0 and 1 respectively, bit6+bit7 means auto(last rx)
374 * for NREV<3, bit 6 and bit 7 means antenna 0 and 1 respectively, bit6+bit7 means last rx and
375 * do tx-antenna selection for SISO transmissions
376 * for NREV=3, bit 6 and bit _8_ means antenna 0 and 1 respectively, bit6+bit7 means last rx and
377 * do tx-antenna selection for SISO transmissions
378 * for NREV>=7, bit 6 and bit 7 mean antenna 0 and 1 respectively, nit6+bit7 means both cores active
380 static void _wlc_stf_phy_txant_upd(struct wlc_info *wlc)
384 txant = (s8) wlc->stf->txant;
385 if (WLC_PHY_11N_CAP(wlc->band)) {
386 if (txant == ANT_TX_FORCE_0) {
387 wlc->stf->phytxant = PHY_TXC_ANT_0;
388 } else if (txant == ANT_TX_FORCE_1) {
389 wlc->stf->phytxant = PHY_TXC_ANT_1;
391 if (WLCISNPHY(wlc->band) &&
392 NREV_GE(wlc->band->phyrev, 3)
393 && NREV_LT(wlc->band->phyrev, 7)) {
394 wlc->stf->phytxant = PHY_TXC_ANT_2;
397 if (WLCISLCNPHY(wlc->band) || WLCISSSLPNPHY(wlc->band))
398 wlc->stf->phytxant = PHY_TXC_LCNPHY_ANT_LAST;
400 /* catch out of sync wlc->stf->txcore */
401 WARN_ON(wlc->stf->txchain <= 0);
403 wlc->stf->txchain << PHY_TXC_ANT_SHIFT;
407 if (txant == ANT_TX_FORCE_0)
408 wlc->stf->phytxant = PHY_TXC_OLD_ANT_0;
409 else if (txant == ANT_TX_FORCE_1)
410 wlc->stf->phytxant = PHY_TXC_OLD_ANT_1;
412 wlc->stf->phytxant = PHY_TXC_OLD_ANT_LAST;
415 wlc_bmac_txant_set(wlc->hw, wlc->stf->phytxant);
418 void wlc_stf_phy_txant_upd(struct wlc_info *wlc)
420 _wlc_stf_phy_txant_upd(wlc);
423 void wlc_stf_phy_chain_calc(struct wlc_info *wlc)
425 /* get available rx/tx chains */
426 wlc->stf->hw_txchain = (u8) getintvar(wlc->pub->vars, "txchain");
427 wlc->stf->hw_rxchain = (u8) getintvar(wlc->pub->vars, "rxchain");
429 /* these parameter are intended to be used for all PHY types */
430 if (wlc->stf->hw_txchain == 0 || wlc->stf->hw_txchain == 0xf) {
431 if (WLCISNPHY(wlc->band)) {
432 wlc->stf->hw_txchain = TXCHAIN_DEF_NPHY;
434 wlc->stf->hw_txchain = TXCHAIN_DEF;
438 wlc->stf->txchain = wlc->stf->hw_txchain;
439 wlc->stf->txstreams = (u8) WLC_BITSCNT(wlc->stf->hw_txchain);
441 if (wlc->stf->hw_rxchain == 0 || wlc->stf->hw_rxchain == 0xf) {
442 if (WLCISNPHY(wlc->band)) {
443 wlc->stf->hw_rxchain = RXCHAIN_DEF_NPHY;
445 wlc->stf->hw_rxchain = RXCHAIN_DEF;
449 wlc->stf->rxchain = wlc->stf->hw_rxchain;
450 wlc->stf->rxstreams = (u8) WLC_BITSCNT(wlc->stf->hw_rxchain);
452 /* initialize the txcore table */
453 memcpy(wlc->stf->txcore, txcore_default, sizeof(wlc->stf->txcore));
455 /* default spatial_policy */
456 wlc->stf->spatial_policy = MIN_SPATIAL_EXPANSION;
457 wlc_stf_spatial_policy_set(wlc, MIN_SPATIAL_EXPANSION);
460 static u16 _wlc_stf_phytxchain_sel(struct wlc_info *wlc, ratespec_t rspec)
462 u16 phytxant = wlc->stf->phytxant;
464 if (RSPEC_STF(rspec) != PHY_TXC1_MODE_SISO) {
465 phytxant = wlc->stf->txchain << PHY_TXC_ANT_SHIFT;
466 } else if (wlc->stf->txant == ANT_TX_DEF)
467 phytxant = wlc->stf->txchain << PHY_TXC_ANT_SHIFT;
468 phytxant &= PHY_TXC_ANT_MASK;
472 u16 wlc_stf_phytxchain_sel(struct wlc_info *wlc, ratespec_t rspec)
474 return _wlc_stf_phytxchain_sel(wlc, rspec);
477 u16 wlc_stf_d11hdrs_phyctl_txant(struct wlc_info *wlc, ratespec_t rspec)
479 u16 phytxant = wlc->stf->phytxant;
480 u16 mask = PHY_TXC_ANT_MASK;
482 /* for non-siso rates or default setting, use the available chains */
483 if (WLCISNPHY(wlc->band)) {
484 phytxant = _wlc_stf_phytxchain_sel(wlc, rspec);
485 mask = PHY_TXC_HTANT_MASK;
487 phytxant |= phytxant & mask;