1 files changed, 593 insertions, 0 deletions

diff --git a/drivers/staging/brcm80211/sys/wlc_stf.c b/drivers/staging/brcm80211/sys/wlc_stf.c
new file mode 100644
index 0000000..4728ad9
--- /dev/null
+++ b/drivers/staging/brcm80211/sys/wlc_stf.c
@@ -0,0 +1,593 @@
+/*
+ * Copyright (c) 2010 Broadcom Corporation
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+ * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <linux/kernel.h>
+#include <wlc_cfg.h>
+#include <linuxver.h>
+#include <bcmdefs.h>
+#include <osl.h>
+#include <bcmutils.h>
+#include <siutils.h>
+#include <bcmendian.h>
+#include <proto/802.11.h>
+#include <wlioctl.h>
+#include <bcmwifi.h>
+#include <d11.h>
+#include <wlc_rate.h>
+#include <wlc_pub.h>
+#include <wlc_key.h>
+#include <wlc_channel.h>
+#include <wlc_bsscfg.h>
+#include <wlc_mac80211.h>
+#include <wlc_scb.h>
+#include <wl_export.h>
+#include <wlc_bmac.h>
+#include <wlc_stf.h>
+
+#define WLC_STF_SS_STBC_RX(wlc) (WLCISNPHY(wlc->band) && \
+	NREV_GT(wlc->band->phyrev, 3) && NREV_LE(wlc->band->phyrev, 6))
+
+static s8 wlc_stf_stbc_rx_get(wlc_info_t *wlc);
+static bool wlc_stf_stbc_tx_set(wlc_info_t *wlc, s32 int_val);
+static int wlc_stf_txcore_set(wlc_info_t *wlc, u8 Nsts, u8 val);
+static int wlc_stf_spatial_policy_set(wlc_info_t *wlc, int val);
+static void wlc_stf_stbc_rx_ht_update(wlc_info_t *wlc, int val);
+
+static void _wlc_stf_phy_txant_upd(wlc_info_t *wlc);
+static u16 _wlc_stf_phytxchain_sel(wlc_info_t *wlc, ratespec_t rspec);
+
+#define NSTS_1	1
+#define NSTS_2	2
+#define NSTS_3	3
+#define NSTS_4	4
+const u8 txcore_default[5] = {
+	(0),			/* bitmap of the core enabled */
+	(0x01),			/* For Nsts = 1, enable core 1 */
+	(0x03),			/* For Nsts = 2, enable core 1 & 2 */
+	(0x07),			/* For Nsts = 3, enable core 1, 2 & 3 */
+	(0x0f)			/* For Nsts = 4, enable all cores */
+};
+
+static void wlc_stf_stbc_rx_ht_update(wlc_info_t *wlc, int val)
+{
+	ASSERT((val == HT_CAP_RX_STBC_NO)
+	       || (val == HT_CAP_RX_STBC_ONE_STREAM));
+
+	/* MIMOPHYs rev3-6 cannot receive STBC with only one rx core active */
+	if (WLC_STF_SS_STBC_RX(wlc)) {
+		if ((wlc->stf->rxstreams == 1) && (val != HT_CAP_RX_STBC_NO))
+			return;
+	}
+
+	wlc->ht_cap.cap &= ~HT_CAP_RX_STBC_MASK;
+	wlc->ht_cap.cap |= (val << HT_CAP_RX_STBC_SHIFT);
+
+	if (wlc->pub->up) {
+		wlc_update_beacon(wlc);
+		wlc_update_probe_resp(wlc, true);
+	}
+}
+
+/* every WLC_TEMPSENSE_PERIOD seconds temperature check to decide whether to turn on/off txchain */
+void wlc_tempsense_upd(wlc_info_t *wlc)
+{
+	wlc_phy_t *pi = wlc->band->pi;
+	uint active_chains, txchain;
+
+	/* Check if the chip is too hot. Disable one Tx chain, if it is */
+	/* high 4 bits are for Rx chain, low 4 bits are  for Tx chain */
+	active_chains = wlc_phy_stf_chain_active_get(pi);
+	txchain = active_chains & 0xf;
+
+	if (wlc->stf->txchain == wlc->stf->hw_txchain) {
+		if (txchain && (txchain < wlc->stf->hw_txchain)) {
+			/* turn off 1 tx chain */
+			wlc_stf_txchain_set(wlc, txchain, true);
+		}
+	} else if (wlc->stf->txchain < wlc->stf->hw_txchain) {
+		if (txchain == wlc->stf->hw_txchain) {
+			/* turn back on txchain */
+			wlc_stf_txchain_set(wlc, txchain, true);
+		}
+	}
+}
+
+void
+wlc_stf_ss_algo_channel_get(wlc_info_t *wlc, u16 *ss_algo_channel,
+			    chanspec_t chanspec)
+{
+	tx_power_t power;
+	u8 siso_mcs_id, cdd_mcs_id, stbc_mcs_id;
+
+	/* Clear previous settings */
+	*ss_algo_channel = 0;
+
+	if (!wlc->pub->up) {
+		*ss_algo_channel = (u16) -1;
+		return;
+	}
+
+	wlc_phy_txpower_get_current(wlc->band->pi, &power,
+				    CHSPEC_CHANNEL(chanspec));
+
+	siso_mcs_id = (CHSPEC_IS40(chanspec)) ?
+	    WL_TX_POWER_MCS40_SISO_FIRST : WL_TX_POWER_MCS20_SISO_FIRST;
+	cdd_mcs_id = (CHSPEC_IS40(chanspec)) ?
+	    WL_TX_POWER_MCS40_CDD_FIRST : WL_TX_POWER_MCS20_CDD_FIRST;
+	stbc_mcs_id = (CHSPEC_IS40(chanspec)) ?
+	    WL_TX_POWER_MCS40_STBC_FIRST : WL_TX_POWER_MCS20_STBC_FIRST;
+
+	/* criteria to choose stf mode */
+
+	/* the "+3dbm (12 0.25db units)" is to account for the fact that with CDD, tx occurs
+	 * on both chains
+	 */
+	if (power.target[siso_mcs_id] > (power.target[cdd_mcs_id] + 12))
+		setbit(ss_algo_channel, PHY_TXC1_MODE_SISO);
+	else
+		setbit(ss_algo_channel, PHY_TXC1_MODE_CDD);
+
+	/* STBC is ORed into to algo channel as STBC requires per-packet SCB capability check
+	 * so cannot be default mode of operation. One of SISO, CDD have to be set
+	 */
+	if (power.target[siso_mcs_id] <= (power.target[stbc_mcs_id] + 12))
+		setbit(ss_algo_channel, PHY_TXC1_MODE_STBC);
+}
+
+static s8 wlc_stf_stbc_rx_get(wlc_info_t *wlc)
+{
+	return (wlc->ht_cap.cap & HT_CAP_RX_STBC_MASK) >> HT_CAP_RX_STBC_SHIFT;
+}
+
+static bool wlc_stf_stbc_tx_set(wlc_info_t *wlc, s32 int_val)
+{
+	if ((int_val != AUTO) && (int_val != OFF) && (int_val != ON)) {
+		return false;
+	}
+
+	if ((int_val == ON) && (wlc->stf->txstreams == 1))
+		return false;
+
+	if ((int_val == OFF) || (wlc->stf->txstreams == 1)
+	    || !WLC_STBC_CAP_PHY(wlc))
+		wlc->ht_cap.cap &= ~HT_CAP_TX_STBC;
+	else
+		wlc->ht_cap.cap |= HT_CAP_TX_STBC;
+
+	wlc->bandstate[BAND_2G_INDEX]->band_stf_stbc_tx = (s8) int_val;
+	wlc->bandstate[BAND_5G_INDEX]->band_stf_stbc_tx = (s8) int_val;
+
+	return true;
+}
+
+bool wlc_stf_stbc_rx_set(wlc_info_t *wlc, s32 int_val)
+{
+	if ((int_val != HT_CAP_RX_STBC_NO)
+	    && (int_val != HT_CAP_RX_STBC_ONE_STREAM)) {
+		return false;
+	}
+
+	if (WLC_STF_SS_STBC_RX(wlc)) {
+		if ((int_val != HT_CAP_RX_STBC_NO)
+		    && (wlc->stf->rxstreams == 1))
+			return false;
+	}
+
+	wlc_stf_stbc_rx_ht_update(wlc, int_val);
+	return true;
+}
+
+static int wlc_stf_txcore_set(wlc_info_t *wlc, u8 Nsts, u8 core_mask)
+{
+	WL_TRACE(("wl%d: %s: Nsts %d core_mask %x\n",
+		  wlc->pub->unit, __func__, Nsts, core_mask));
+
+	ASSERT((Nsts > 0) && (Nsts <= MAX_STREAMS_SUPPORTED));
+
+	if (WLC_BITSCNT(core_mask) > wlc->stf->txstreams) {
+		core_mask = 0;
+	}
+
+	if ((WLC_BITSCNT(core_mask) == wlc->stf->txstreams) &&
+	    ((core_mask & ~wlc->stf->txchain)
+	     || !(core_mask & wlc->stf->txchain))) {
+		core_mask = wlc->stf->txchain;
+	}
+
+	ASSERT(!core_mask || Nsts <= WLC_BITSCNT(core_mask));
+
+	wlc->stf->txcore[Nsts] = core_mask;
+	/* Nsts = 1..4, txcore index = 1..4 */
+	if (Nsts == 1) {
+		/* Needs to update beacon and ucode generated response
+		 * frames when 1 stream core map changed
+		 */
+		wlc->stf->phytxant = core_mask << PHY_TXC_ANT_SHIFT;
+		wlc_bmac_txant_set(wlc->hw, wlc->stf->phytxant);
+		if (wlc->clk) {
+			wlc_suspend_mac_and_wait(wlc);
+			wlc_beacon_phytxctl_txant_upd(wlc, wlc->bcn_rspec);
+			wlc_enable_mac(wlc);
+		}
+	}
+
+	return BCME_OK;
+}
+
+static int wlc_stf_spatial_policy_set(wlc_info_t *wlc, int val)
+{
+	int i;
+	u8 core_mask = 0;
+
+	WL_TRACE(("wl%d: %s: val %x\n", wlc->pub->unit, __func__, val));
+
+	wlc->stf->spatial_policy = (s8) val;
+	for (i = 1; i <= MAX_STREAMS_SUPPORTED; i++) {
+		core_mask = (val == MAX_SPATIAL_EXPANSION) ?
+		    wlc->stf->txchain : txcore_default[i];
+		wlc_stf_txcore_set(wlc, (u8) i, core_mask);
+	}
+	return BCME_OK;
+}
+
+int wlc_stf_txchain_set(wlc_info_t *wlc, s32 int_val, bool force)
+{
+	u8 txchain = (u8) int_val;
+	u8 txstreams;
+	uint i;
+
+	if (wlc->stf->txchain == txchain)
+		return BCME_OK;
+
+	if ((txchain & ~wlc->stf->hw_txchain)
+	    || !(txchain & wlc->stf->hw_txchain))
+		return BCME_RANGE;
+
+	/* if nrate override is configured to be non-SISO STF mode, reject reducing txchain to 1 */
+	txstreams = (u8) WLC_BITSCNT(txchain);
+	if (txstreams > MAX_STREAMS_SUPPORTED)
+		return BCME_RANGE;
+
+	if (txstreams == 1) {
+		for (i = 0; i < NBANDS(wlc); i++)
+			if ((RSPEC_STF(wlc->bandstate[i]->rspec_override) !=
+			     PHY_TXC1_MODE_SISO)
+			    || (RSPEC_STF(wlc->bandstate[i]->mrspec_override) !=
+				PHY_TXC1_MODE_SISO)) {
+				if (!force)
+					return BCME_ERROR;
+
+				/* over-write the override rspec */
+				if (RSPEC_STF(wlc->bandstate[i]->rspec_override)
+				    != PHY_TXC1_MODE_SISO) {
+					wlc->bandstate[i]->rspec_override = 0;
+					WL_ERROR(("%s(): temp sense override non-SISO" " rspec_override.\n", __func__));
+				}
+				if (RSPEC_STF
+				    (wlc->bandstate[i]->mrspec_override) !=
+				    PHY_TXC1_MODE_SISO) {
+					wlc->bandstate[i]->mrspec_override = 0;
+					WL_ERROR(("%s(): temp sense override non-SISO" " mrspec_override.\n", __func__));
+				}
+			}
+	}
+
+	wlc->stf->txchain = txchain;
+	wlc->stf->txstreams = txstreams;
+	wlc_stf_stbc_tx_set(wlc, wlc->band->band_stf_stbc_tx);
+	wlc_stf_ss_update(wlc, wlc->bandstate[BAND_2G_INDEX]);
+	wlc_stf_ss_update(wlc, wlc->bandstate[BAND_5G_INDEX]);
+	wlc->stf->txant =
+	    (wlc->stf->txstreams == 1) ? ANT_TX_FORCE_0 : ANT_TX_DEF;
+	_wlc_stf_phy_txant_upd(wlc);
+
+	wlc_phy_stf_chain_set(wlc->band->pi, wlc->stf->txchain,
+			      wlc->stf->rxchain);
+
+	for (i = 1; i <= MAX_STREAMS_SUPPORTED; i++)
+		wlc_stf_txcore_set(wlc, (u8) i, txcore_default[i]);
+
+	return BCME_OK;
+}
+
+int wlc_stf_rxchain_set(wlc_info_t *wlc, s32 int_val)
+{
+	u8 rxchain_cnt;
+	u8 rxchain = (u8) int_val;
+	u8 mimops_mode;
+	u8 old_rxchain, old_rxchain_cnt;
+
+	if (wlc->stf->rxchain == rxchain)
+		return BCME_OK;
+
+	if ((rxchain & ~wlc->stf->hw_rxchain)
+	    || !(rxchain & wlc->stf->hw_rxchain))
+		return BCME_RANGE;
+
+	rxchain_cnt = (u8) WLC_BITSCNT(rxchain);
+	if (WLC_STF_SS_STBC_RX(wlc)) {
+		if ((rxchain_cnt == 1)
+		    && (wlc_stf_stbc_rx_get(wlc) != HT_CAP_RX_STBC_NO))
+			return BCME_RANGE;
+	}
+
+	if (APSTA_ENAB(wlc->pub) && (wlc->pub->associated))
+		return BCME_ASSOCIATED;
+
+	old_rxchain = wlc->stf->rxchain;
+	old_rxchain_cnt = wlc->stf->rxstreams;
+
+	wlc->stf->rxchain = rxchain;
+	wlc->stf->rxstreams = rxchain_cnt;
+
+	if (rxchain_cnt != old_rxchain_cnt) {
+		mimops_mode =
+		    (rxchain_cnt == 1) ? HT_CAP_MIMO_PS_ON : HT_CAP_MIMO_PS_OFF;
+		wlc->mimops_PM = mimops_mode;
+		if (AP_ENAB(wlc->pub)) {
+			wlc_phy_stf_chain_set(wlc->band->pi, wlc->stf->txchain,
+					      wlc->stf->rxchain);
+			wlc_ht_mimops_cap_update(wlc, mimops_mode);
+			if (wlc->pub->associated)
+				wlc_mimops_action_ht_send(wlc, wlc->cfg,
+							  mimops_mode);
+			return BCME_OK;
+		}
+		if (wlc->pub->associated) {
+			if (mimops_mode == HT_CAP_MIMO_PS_OFF) {
+				/* if mimops is off, turn on the Rx chain first */
+				wlc_phy_stf_chain_set(wlc->band->pi,
+						      wlc->stf->txchain,
+						      wlc->stf->rxchain);
+				wlc_ht_mimops_cap_update(wlc, mimops_mode);
+			}
+		} else {
+			wlc_phy_stf_chain_set(wlc->band->pi, wlc->stf->txchain,
+					      wlc->stf->rxchain);
+			wlc_ht_mimops_cap_update(wlc, mimops_mode);
+		}
+	} else if (old_rxchain != rxchain)
+		wlc_phy_stf_chain_set(wlc->band->pi, wlc->stf->txchain,
+				      wlc->stf->rxchain);
+
+	return BCME_OK;
+}
+
+/* update wlc->stf->ss_opmode which represents the operational stf_ss mode we're using */
+int wlc_stf_ss_update(wlc_info_t *wlc, wlcband_t *band)
+{
+	int ret_code = 0;
+	u8 prev_stf_ss;
+	u8 upd_stf_ss;
+
+	prev_stf_ss = wlc->stf->ss_opmode;
+
+	/* NOTE: opmode can only be SISO or CDD as STBC is decided on a per-packet basis */
+	if (WLC_STBC_CAP_PHY(wlc) &&
+	    wlc->stf->ss_algosel_auto
+	    && (wlc->stf->ss_algo_channel != (u16) -1)) {
+		ASSERT(isset(&wlc->stf->ss_algo_channel, PHY_TXC1_MODE_CDD)
+		       || isset(&wlc->stf->ss_algo_channel,
+				PHY_TXC1_MODE_SISO));
+		upd_stf_ss = (wlc->stf->no_cddstbc || (wlc->stf->txstreams == 1)
+			      || isset(&wlc->stf->ss_algo_channel,
+				       PHY_TXC1_MODE_SISO)) ? PHY_TXC1_MODE_SISO
+		    : PHY_TXC1_MODE_CDD;
+	} else {
+		if (wlc->band != band)
+			return ret_code;
+		upd_stf_ss = (wlc->stf->no_cddstbc
+			      || (wlc->stf->txstreams ==
+				  1)) ? PHY_TXC1_MODE_SISO : band->
+		    band_stf_ss_mode;
+	}
+	if (prev_stf_ss != upd_stf_ss) {
+		wlc->stf->ss_opmode = upd_stf_ss;
+		wlc_bmac_band_stf_ss_set(wlc->hw, upd_stf_ss);
+	}
+
+	return ret_code;
+}
+
+int wlc_stf_attach(wlc_info_t *wlc)
+{
+	wlc->bandstate[BAND_2G_INDEX]->band_stf_ss_mode = PHY_TXC1_MODE_SISO;
+	wlc->bandstate[BAND_5G_INDEX]->band_stf_ss_mode = PHY_TXC1_MODE_CDD;
+
+	if (WLCISNPHY(wlc->band) &&
+	    (wlc_phy_txpower_hw_ctrl_get(wlc->band->pi) != PHY_TPC_HW_ON))
+		wlc->bandstate[BAND_2G_INDEX]->band_stf_ss_mode =
+		    PHY_TXC1_MODE_CDD;
+	wlc_stf_ss_update(wlc, wlc->bandstate[BAND_2G_INDEX]);
+	wlc_stf_ss_update(wlc, wlc->bandstate[BAND_5G_INDEX]);
+
+	wlc_stf_stbc_rx_ht_update(wlc, HT_CAP_RX_STBC_NO);
+	wlc->bandstate[BAND_2G_INDEX]->band_stf_stbc_tx = OFF;
+	wlc->bandstate[BAND_5G_INDEX]->band_stf_stbc_tx = OFF;
+
+	if (WLC_STBC_CAP_PHY(wlc)) {
+		wlc->stf->ss_algosel_auto = true;
+		wlc->stf->ss_algo_channel = (u16) -1;	/* Init the default value */
+	}
+	return 0;
+}
+
+void wlc_stf_detach(wlc_info_t *wlc)
+{
+}
+
+int wlc_stf_ant_txant_validate(wlc_info_t *wlc, s8 val)
+{
+	int bcmerror = BCME_OK;
+
+	/* when there is only 1 tx_streams, don't allow to change the txant */
+	if (WLCISNPHY(wlc->band) && (wlc->stf->txstreams == 1))
+		return ((val == wlc->stf->txant) ? bcmerror : BCME_RANGE);
+
+	switch (val) {
+	case -1:
+		val = ANT_TX_DEF;
+		break;
+	case 0:
+		val = ANT_TX_FORCE_0;
+		break;
+	case 1:
+		val = ANT_TX_FORCE_1;
+		break;
+	case 3:
+		val = ANT_TX_LAST_RX;
+		break;
+	default:
+		bcmerror = BCME_RANGE;
+		break;
+	}
+
+	if (bcmerror == BCME_OK)
+		wlc->stf->txant = (s8) val;
+
+	return bcmerror;
+
+}
+
+/*
+ * Centralized txant update function. call it whenever wlc->stf->txant and/or wlc->stf->txchain
+ *  change
+ *
+ * Antennas are controlled by ucode indirectly, which drives PHY or GPIO to
+ *   achieve various tx/rx antenna selection schemes
+ *
+ * legacy phy, bit 6 and bit 7 means antenna 0 and 1 respectively, bit6+bit7 means auto(last rx)
+ * for NREV<3, bit 6 and bit 7 means antenna 0 and 1 respectively, bit6+bit7 means last rx and
+ *    do tx-antenna selection for SISO transmissions
+ * for NREV=3, bit 6 and bit _8_ means antenna 0 and 1 respectively, bit6+bit7 means last rx and
+ *    do tx-antenna selection for SISO transmissions
+ * for NREV>=7, bit 6 and bit 7 mean antenna 0 and 1 respectively, nit6+bit7 means both cores active
+*/
+static void _wlc_stf_phy_txant_upd(wlc_info_t *wlc)
+{
+	s8 txant;
+
+	txant = (s8) wlc->stf->txant;
+	ASSERT(txant == ANT_TX_FORCE_0 || txant == ANT_TX_FORCE_1
+	       || txant == ANT_TX_LAST_RX);
+
+	if (WLC_PHY_11N_CAP(wlc->band)) {
+		if (txant == ANT_TX_FORCE_0) {
+			wlc->stf->phytxant = PHY_TXC_ANT_0;
+		} else if (txant == ANT_TX_FORCE_1) {
+			wlc->stf->phytxant = PHY_TXC_ANT_1;
+
+			if (WLCISNPHY(wlc->band) &&
+			    NREV_GE(wlc->band->phyrev, 3)
+			    && NREV_LT(wlc->band->phyrev, 7)) {
+				wlc->stf->phytxant = PHY_TXC_ANT_2;
+			}
+		} else {
+			if (WLCISLCNPHY(wlc->band) || WLCISSSLPNPHY(wlc->band))
+				wlc->stf->phytxant = PHY_TXC_LCNPHY_ANT_LAST;
+			else {
+				/* keep this assert to catch out of sync wlc->stf->txcore */
+				ASSERT(wlc->stf->txchain > 0);
+				wlc->stf->phytxant =
+				    wlc->stf->txchain << PHY_TXC_ANT_SHIFT;
+			}
+		}
+	} else {
+		if (txant == ANT_TX_FORCE_0)
+			wlc->stf->phytxant = PHY_TXC_OLD_ANT_0;
+		else if (txant == ANT_TX_FORCE_1)
+			wlc->stf->phytxant = PHY_TXC_OLD_ANT_1;
+		else
+			wlc->stf->phytxant = PHY_TXC_OLD_ANT_LAST;
+	}
+
+	wlc_bmac_txant_set(wlc->hw, wlc->stf->phytxant);
+}
+
+void wlc_stf_phy_txant_upd(wlc_info_t *wlc)
+{
+	_wlc_stf_phy_txant_upd(wlc);
+}
+
+void wlc_stf_phy_chain_calc(wlc_info_t *wlc)
+{
+	/* get available rx/tx chains */
+	wlc->stf->hw_txchain = (u8) getintvar(wlc->pub->vars, "txchain");
+	wlc->stf->hw_rxchain = (u8) getintvar(wlc->pub->vars, "rxchain");
+
+	/* these parameter are intended to be used for all PHY types */
+	if (wlc->stf->hw_txchain == 0 || wlc->stf->hw_txchain == 0xf) {
+		if (WLCISNPHY(wlc->band)) {
+			wlc->stf->hw_txchain = TXCHAIN_DEF_NPHY;
+		} else {
+			wlc->stf->hw_txchain = TXCHAIN_DEF;
+		}
+	}
+
+	wlc->stf->txchain = wlc->stf->hw_txchain;
+	wlc->stf->txstreams = (u8) WLC_BITSCNT(wlc->stf->hw_txchain);
+
+	if (wlc->stf->hw_rxchain == 0 || wlc->stf->hw_rxchain == 0xf) {
+		if (WLCISNPHY(wlc->band)) {
+			wlc->stf->hw_rxchain = RXCHAIN_DEF_NPHY;
+		} else {
+			wlc->stf->hw_rxchain = RXCHAIN_DEF;
+		}
+	}
+
+	wlc->stf->rxchain = wlc->stf->hw_rxchain;
+	wlc->stf->rxstreams = (u8) WLC_BITSCNT(wlc->stf->hw_rxchain);
+
+	/* initialize the txcore table */
+	bcopy(txcore_default, wlc->stf->txcore, sizeof(wlc->stf->txcore));
+
+	/* default spatial_policy */
+	wlc->stf->spatial_policy = MIN_SPATIAL_EXPANSION;
+	wlc_stf_spatial_policy_set(wlc, MIN_SPATIAL_EXPANSION);
+}
+
+static u16 _wlc_stf_phytxchain_sel(wlc_info_t *wlc, ratespec_t rspec)
+{
+	u16 phytxant = wlc->stf->phytxant;
+
+	if (RSPEC_STF(rspec) != PHY_TXC1_MODE_SISO) {
+		ASSERT(wlc->stf->txstreams > 1);
+		phytxant = wlc->stf->txchain << PHY_TXC_ANT_SHIFT;
+	} else if (wlc->stf->txant == ANT_TX_DEF)
+		phytxant = wlc->stf->txchain << PHY_TXC_ANT_SHIFT;
+	phytxant &= PHY_TXC_ANT_MASK;
+	return phytxant;
+}
+
+u16 wlc_stf_phytxchain_sel(wlc_info_t *wlc, ratespec_t rspec)
+{
+	return _wlc_stf_phytxchain_sel(wlc, rspec);
+}
+
+u16 wlc_stf_d11hdrs_phyctl_txant(wlc_info_t *wlc, ratespec_t rspec)
+{
+	u16 phytxant = wlc->stf->phytxant;
+	u16 mask = PHY_TXC_ANT_MASK;
+
+	/* for non-siso rates or default setting, use the available chains */
+	if (WLCISNPHY(wlc->band)) {
+		ASSERT(wlc->stf->txchain != 0);
+		phytxant = _wlc_stf_phytxchain_sel(wlc, rspec);
+		mask = PHY_TXC_HTANT_MASK;
+	}
+	phytxant |= phytxant & mask;
+	return phytxant;
+}