[deliverable/linux.git] / drivers / staging / brcm80211 / brcmsmac / wlc_stf.c

/*
 * 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 <linux/module.h>
#include <wlc_cfg.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 <sbhndpio.h>
#include <sbhnddma.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_event.h>
#include <wlc_mac80211.h>
#include <wlc_scb.h>
#include <wl_export.h>
#include <wlc_bmac.h>
#include <wlc_stf.h>
#include <wl_dbg.h>

#define WLC_STF_SS_STBC_RX(wlc) (WLCISNPHY(wlc->band) && \
	NREV_GT(wlc->band->phyrev, 3) && NREV_LE(wlc->band->phyrev, 6))

static bool wlc_stf_stbc_tx_set(struct wlc_info *wlc, s32 int_val);
static int wlc_stf_txcore_set(struct wlc_info *wlc, u8 Nsts, u8 val);
static int wlc_stf_spatial_policy_set(struct wlc_info *wlc, int val);
static void wlc_stf_stbc_rx_ht_update(struct wlc_info *wlc, int val);

static void _wlc_stf_phy_txant_upd(struct wlc_info *wlc);
static u16 _wlc_stf_phytxchain_sel(struct wlc_info *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(struct wlc_info *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_info &= ~HT_CAP_RX_STBC_MASK;
	wlc->ht_cap.cap_info |= (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(struct wlc_info *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(struct wlc_info *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 bool wlc_stf_stbc_tx_set(struct wlc_info *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_info &= ~IEEE80211_HT_CAP_TX_STBC;
	else
		wlc->ht_cap.cap_info |= IEEE80211_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(struct wlc_info *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(struct wlc_info *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(struct wlc_info *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(struct wlc_info *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;
}

/* update wlc->stf->ss_opmode which represents the operational stf_ss mode we're using */
int wlc_stf_ss_update(struct wlc_info *wlc, struct wlcband *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(struct wlc_info *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(struct wlc_info *wlc)
{
}

int wlc_stf_ant_txant_validate(struct wlc_info *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(struct wlc_info *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(struct wlc_info *wlc)
{
	_wlc_stf_phy_txant_upd(wlc);
}

void wlc_stf_phy_chain_calc(struct wlc_info *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(struct wlc_info *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(struct wlc_info *wlc, ratespec_t rspec)
{
	return _wlc_stf_phytxchain_sel(wlc, rspec);
}

u16 wlc_stf_d11hdrs_phyctl_txant(struct wlc_info *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;
}
Commit	Line	Data
a9533e7e HP	1	/*
	2	* Copyright (c) 2010 Broadcom Corporation
	3	*
	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.
	7	*
	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.
	15	*/
	16
3327989a	17	#include <linux/kernel.h>
c6ac24e9	18	#include <linux/module.h>
a1c16ed2	19	#include <wlc_cfg.h>
a9533e7e HP	20	#include <bcmdefs.h>
	21	#include <osl.h>
	22	#include <bcmutils.h>
	23	#include <siutils.h>
	24	#include <bcmendian.h>
	25	#include <proto/802.11.h>
	26	#include <wlioctl.h>
a9533e7e	27	#include <bcmwifi.h>
a52ba66c BR	28	#include <sbhndpio.h>
a52ba66c BR	29	#include <sbhnddma.h>
a9533e7e HP	30	#include <d11.h>
	31	#include <wlc_rate.h>
	32	#include <wlc_pub.h>
	33	#include <wlc_key.h>
	34	#include <wlc_channel.h>
	35	#include <wlc_bsscfg.h>
69ec303a	36	#include <wlc_event.h>
a9533e7e HP	37	#include <wlc_mac80211.h>
	38	#include <wlc_scb.h>
	39	#include <wl_export.h>
	40	#include <wlc_bmac.h>
	41	#include <wlc_stf.h>
69ec303a	42	#include <wl_dbg.h>
a9533e7e HP	43
	44	#define WLC_STF_SS_STBC_RX(wlc) (WLCISNPHY(wlc->band) && \
	45	NREV_GT(wlc->band->phyrev, 3) && NREV_LE(wlc->band->phyrev, 6))
	46
c6a9e1fc RV	47	static bool wlc_stf_stbc_tx_set(struct wlc_info *wlc, s32 int_val);
	48	static int wlc_stf_txcore_set(struct wlc_info *wlc, u8 Nsts, u8 val);
	49	static int wlc_stf_spatial_policy_set(struct wlc_info *wlc, int val);
	50	static void wlc_stf_stbc_rx_ht_update(struct wlc_info *wlc, int val);
a9533e7e	51
c6a9e1fc RV	52	static void _wlc_stf_phy_txant_upd(struct wlc_info *wlc);
c6a9e1fc RV	53	static u16 _wlc_stf_phytxchain_sel(struct wlc_info *wlc, ratespec_t rspec);
a9533e7e HP	54
	55	#define NSTS_1 1
	56	#define NSTS_2 2
	57	#define NSTS_3 3
	58	#define NSTS_4 4
41feb5ed	59	const u8 txcore_default[5] = {
a9533e7e HP	60	(0), /* bitmap of the core enabled */
	61	(0x01), /* For Nsts = 1, enable core 1 */
	62	(0x03), /* For Nsts = 2, enable core 1 & 2 */
	63	(0x07), /* For Nsts = 3, enable core 1, 2 & 3 */
	64	(0x0f) /* For Nsts = 4, enable all cores */
	65	};
	66
c6a9e1fc	67	static void wlc_stf_stbc_rx_ht_update(struct wlc_info *wlc, int val)
a9533e7e HP	68	{
	69	ASSERT((val == HT_CAP_RX_STBC_NO)
	70	\|\| (val == HT_CAP_RX_STBC_ONE_STREAM));
	71
	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))
	75	return;
	76	}
	77
651bd3a9 RV	78	wlc->ht_cap.cap_info &= ~HT_CAP_RX_STBC_MASK;
651bd3a9 RV	79	wlc->ht_cap.cap_info \|= (val << HT_CAP_RX_STBC_SHIFT);
a9533e7e HP	80
	81	if (wlc->pub->up) {
	82	wlc_update_beacon(wlc);
0f0881b0	83	wlc_update_probe_resp(wlc, true);
a9533e7e HP	84	}
	85	}
	86
	87	/* every WLC_TEMPSENSE_PERIOD seconds temperature check to decide whether to turn on/off txchain */
c6a9e1fc	88	void wlc_tempsense_upd(struct wlc_info *wlc)
a9533e7e HP	89	{
	90	wlc_phy_t *pi = wlc->band->pi;
	91	uint active_chains, txchain;
	92
	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;
	97
	98	if (wlc->stf->txchain == wlc->stf->hw_txchain) {
	99	if (txchain && (txchain < wlc->stf->hw_txchain)) {
	100	/* turn off 1 tx chain */
0f0881b0	101	wlc_stf_txchain_set(wlc, txchain, true);
a9533e7e HP	102	}
	103	} else if (wlc->stf->txchain < wlc->stf->hw_txchain) {
	104	if (txchain == wlc->stf->hw_txchain) {
	105	/* turn back on txchain */
0f0881b0	106	wlc_stf_txchain_set(wlc, txchain, true);
a9533e7e HP	107	}
	108	}
	109	}
	110
	111	void
c6a9e1fc	112	wlc_stf_ss_algo_channel_get(struct wlc_info wlc, u16 ss_algo_channel,
a9533e7e HP	113	chanspec_t chanspec)
	114	{
	115	tx_power_t power;
41feb5ed	116	u8 siso_mcs_id, cdd_mcs_id, stbc_mcs_id;
a9533e7e HP	117
	118	/* Clear previous settings */
	119	*ss_algo_channel = 0;
	120
	121	if (!wlc->pub->up) {
7d4df48e	122	*ss_algo_channel = (u16) -1;
a9533e7e HP	123	return;
	124	}
	125
	126	wlc_phy_txpower_get_current(wlc->band->pi, &power,
	127	CHSPEC_CHANNEL(chanspec));
	128
	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;
	135
	136	/* criteria to choose stf mode */
	137
	138	/* the "+3dbm (12 0.25db units)" is to account for the fact that with CDD, tx occurs
	139	* on both chains
	140	*/
	141	if (power.target[siso_mcs_id] > (power.target[cdd_mcs_id] + 12))
	142	setbit(ss_algo_channel, PHY_TXC1_MODE_SISO);
	143	else
	144	setbit(ss_algo_channel, PHY_TXC1_MODE_CDD);
	145
	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
	148	*/
	149	if (power.target[siso_mcs_id] <= (power.target[stbc_mcs_id] + 12))
	150	setbit(ss_algo_channel, PHY_TXC1_MODE_STBC);
	151	}
	152
c6a9e1fc	153	static bool wlc_stf_stbc_tx_set(struct wlc_info *wlc, s32 int_val)
a9533e7e HP	154	{
a9533e7e HP	155	if ((int_val != AUTO) && (int_val != OFF) && (int_val != ON)) {
0965ae88	156	return false;
a9533e7e HP	157	}
	158
	159	if ((int_val == ON) && (wlc->stf->txstreams == 1))
0965ae88	160	return false;
a9533e7e HP	161
	162	if ((int_val == OFF) \|\| (wlc->stf->txstreams == 1)
	163	\|\| !WLC_STBC_CAP_PHY(wlc))
651bd3a9	164	wlc->ht_cap.cap_info &= ~IEEE80211_HT_CAP_TX_STBC;
a9533e7e	165	else
651bd3a9	166	wlc->ht_cap.cap_info \|= IEEE80211_HT_CAP_TX_STBC;
a9533e7e	167
562c8850 GKH	168	wlc->bandstate[BAND_2G_INDEX]->band_stf_stbc_tx = (s8) int_val;
562c8850 GKH	169	wlc->bandstate[BAND_5G_INDEX]->band_stf_stbc_tx = (s8) int_val;
a9533e7e	170
0f0881b0	171	return true;
a9533e7e HP	172	}
a9533e7e HP	173
c6a9e1fc	174	bool wlc_stf_stbc_rx_set(struct wlc_info *wlc, s32 int_val)
a9533e7e HP	175	{
	176	if ((int_val != HT_CAP_RX_STBC_NO)
	177	&& (int_val != HT_CAP_RX_STBC_ONE_STREAM)) {
0965ae88	178	return false;
a9533e7e HP	179	}
	180
	181	if (WLC_STF_SS_STBC_RX(wlc)) {
	182	if ((int_val != HT_CAP_RX_STBC_NO)
	183	&& (wlc->stf->rxstreams == 1))
0965ae88	184	return false;
a9533e7e HP	185	}
	186
	187	wlc_stf_stbc_rx_ht_update(wlc, int_val);
0f0881b0	188	return true;
a9533e7e HP	189	}
a9533e7e HP	190
c6a9e1fc	191	static int wlc_stf_txcore_set(struct wlc_info *wlc, u8 Nsts, u8 core_mask)
a9533e7e	192	{
f4528696 JP	193	WL_TRACE("wl%d: %s: Nsts %d core_mask %x\n",
f4528696 JP	194	wlc->pub->unit, __func__, Nsts, core_mask);
a9533e7e HP	195
	196	ASSERT((Nsts > 0) && (Nsts <= MAX_STREAMS_SUPPORTED));
	197
	198	if (WLC_BITSCNT(core_mask) > wlc->stf->txstreams) {
	199	core_mask = 0;
	200	}
	201
	202	if ((WLC_BITSCNT(core_mask) == wlc->stf->txstreams) &&
	203	((core_mask & ~wlc->stf->txchain)
	204	\|\| !(core_mask & wlc->stf->txchain))) {
	205	core_mask = wlc->stf->txchain;
	206	}
	207
	208	ASSERT(!core_mask \|\| Nsts <= WLC_BITSCNT(core_mask));
	209
	210	wlc->stf->txcore[Nsts] = core_mask;
	211	/* Nsts = 1..4, txcore index = 1..4 */
	212	if (Nsts == 1) {
	213	/* Needs to update beacon and ucode generated response
	214	* frames when 1 stream core map changed
	215	*/
	216	wlc->stf->phytxant = core_mask << PHY_TXC_ANT_SHIFT;
	217	wlc_bmac_txant_set(wlc->hw, wlc->stf->phytxant);
	218	if (wlc->clk) {
	219	wlc_suspend_mac_and_wait(wlc);
	220	wlc_beacon_phytxctl_txant_upd(wlc, wlc->bcn_rspec);
	221	wlc_enable_mac(wlc);
	222	}
	223	}
	224
	225	return BCME_OK;
	226	}
	227
c6a9e1fc	228	static int wlc_stf_spatial_policy_set(struct wlc_info *wlc, int val)
a9533e7e HP	229	{
a9533e7e HP	230	int i;
41feb5ed	231	u8 core_mask = 0;
a9533e7e	232
f4528696	233	WL_TRACE("wl%d: %s: val %x\n", wlc->pub->unit, __func__, val);
a9533e7e	234
562c8850	235	wlc->stf->spatial_policy = (s8) val;
a9533e7e HP	236	for (i = 1; i <= MAX_STREAMS_SUPPORTED; i++) {
	237	core_mask = (val == MAX_SPATIAL_EXPANSION) ?
	238	wlc->stf->txchain : txcore_default[i];
41feb5ed	239	wlc_stf_txcore_set(wlc, (u8) i, core_mask);
a9533e7e HP	240	}
	241	return BCME_OK;
	242	}
	243
c6a9e1fc	244	int wlc_stf_txchain_set(struct wlc_info *wlc, s32 int_val, bool force)
a9533e7e	245	{
41feb5ed GKH	246	u8 txchain = (u8) int_val;
41feb5ed GKH	247	u8 txstreams;
a9533e7e HP	248	uint i;
	249
	250	if (wlc->stf->txchain == txchain)
	251	return BCME_OK;
	252
	253	if ((txchain & ~wlc->stf->hw_txchain)
	254	\|\| !(txchain & wlc->stf->hw_txchain))
	255	return BCME_RANGE;
	256
	257	/* if nrate override is configured to be non-SISO STF mode, reject reducing txchain to 1 */
41feb5ed	258	txstreams = (u8) WLC_BITSCNT(txchain);
a9533e7e HP	259	if (txstreams > MAX_STREAMS_SUPPORTED)
	260	return BCME_RANGE;
	261
	262	if (txstreams == 1) {
	263	for (i = 0; i < NBANDS(wlc); i++)
	264	if ((RSPEC_STF(wlc->bandstate[i]->rspec_override) !=
	265	PHY_TXC1_MODE_SISO)
	266	\|\| (RSPEC_STF(wlc->bandstate[i]->mrspec_override) !=
	267	PHY_TXC1_MODE_SISO)) {
	268	if (!force)
	269	return BCME_ERROR;
	270
	271	/* over-write the override rspec */
	272	if (RSPEC_STF(wlc->bandstate[i]->rspec_override)
	273	!= PHY_TXC1_MODE_SISO) {
	274	wlc->bandstate[i]->rspec_override = 0;
f4528696 JP	275	WL_ERROR("%s(): temp sense override non-SISO rspec_override\n",
f4528696 JP	276	__func__);
a9533e7e HP	277	}
	278	if (RSPEC_STF
	279	(wlc->bandstate[i]->mrspec_override) !=
	280	PHY_TXC1_MODE_SISO) {
	281	wlc->bandstate[i]->mrspec_override = 0;
f4528696 JP	282	WL_ERROR("%s(): temp sense override non-SISO mrspec_override\n",
f4528696 JP	283	__func__);
a9533e7e HP	284	}
	285	}
	286	}
	287
	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]);
	293	wlc->stf->txant =
	294	(wlc->stf->txstreams == 1) ? ANT_TX_FORCE_0 : ANT_TX_DEF;
	295	_wlc_stf_phy_txant_upd(wlc);
	296
	297	wlc_phy_stf_chain_set(wlc->band->pi, wlc->stf->txchain,
	298	wlc->stf->rxchain);
	299
	300	for (i = 1; i <= MAX_STREAMS_SUPPORTED; i++)
41feb5ed	301	wlc_stf_txcore_set(wlc, (u8) i, txcore_default[i]);
a9533e7e HP	302
	303	return BCME_OK;
	304	}
	305
a9533e7e	306	/* update wlc->stf->ss_opmode which represents the operational stf_ss mode we're using */
f077f718	307	int wlc_stf_ss_update(struct wlc_info wlc, struct wlcband band)
a9533e7e HP	308	{
a9533e7e HP	309	int ret_code = 0;
41feb5ed GKH	310	u8 prev_stf_ss;
41feb5ed GKH	311	u8 upd_stf_ss;
a9533e7e HP	312
	313	prev_stf_ss = wlc->stf->ss_opmode;
	314
	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
7d4df48e	318	&& (wlc->stf->ss_algo_channel != (u16) -1)) {
a9533e7e HP	319	ASSERT(isset(&wlc->stf->ss_algo_channel, PHY_TXC1_MODE_CDD)
	320	\|\| isset(&wlc->stf->ss_algo_channel,
	321	PHY_TXC1_MODE_SISO));
	322	upd_stf_ss = (wlc->stf->no_cddstbc \|\| (wlc->stf->txstreams == 1)
	323	\|\| isset(&wlc->stf->ss_algo_channel,
	324	PHY_TXC1_MODE_SISO)) ? PHY_TXC1_MODE_SISO
	325	: PHY_TXC1_MODE_CDD;
	326	} else {
	327	if (wlc->band != band)
	328	return ret_code;
	329	upd_stf_ss = (wlc->stf->no_cddstbc
	330	\|\| (wlc->stf->txstreams ==
	331	1)) ? PHY_TXC1_MODE_SISO : band->
	332	band_stf_ss_mode;
	333	}
	334	if (prev_stf_ss != upd_stf_ss) {
	335	wlc->stf->ss_opmode = upd_stf_ss;
	336	wlc_bmac_band_stf_ss_set(wlc->hw, upd_stf_ss);
	337	}
	338
	339	return ret_code;
	340	}
	341
c6a9e1fc	342	int wlc_stf_attach(struct wlc_info *wlc)
a2627bc0	343	{
a9533e7e HP	344	wlc->bandstate[BAND_2G_INDEX]->band_stf_ss_mode = PHY_TXC1_MODE_SISO;
	345	wlc->bandstate[BAND_5G_INDEX]->band_stf_ss_mode = PHY_TXC1_MODE_CDD;
	346
	347	if (WLCISNPHY(wlc->band) &&
	348	(wlc_phy_txpower_hw_ctrl_get(wlc->band->pi) != PHY_TPC_HW_ON))
	349	wlc->bandstate[BAND_2G_INDEX]->band_stf_ss_mode =
	350	PHY_TXC1_MODE_CDD;
	351	wlc_stf_ss_update(wlc, wlc->bandstate[BAND_2G_INDEX]);
	352	wlc_stf_ss_update(wlc, wlc->bandstate[BAND_5G_INDEX]);
	353
	354	wlc_stf_stbc_rx_ht_update(wlc, HT_CAP_RX_STBC_NO);
	355	wlc->bandstate[BAND_2G_INDEX]->band_stf_stbc_tx = OFF;
	356	wlc->bandstate[BAND_5G_INDEX]->band_stf_stbc_tx = OFF;
	357
	358	if (WLC_STBC_CAP_PHY(wlc)) {
0f0881b0	359	wlc->stf->ss_algosel_auto = true;
7d4df48e	360	wlc->stf->ss_algo_channel = (u16) -1; /* Init the default value */
a9533e7e HP	361	}
	362	return 0;
	363	}
	364
c6a9e1fc	365	void wlc_stf_detach(struct wlc_info *wlc)
a2627bc0	366	{
a9533e7e HP	367	}
a9533e7e HP	368
c6a9e1fc	369	int wlc_stf_ant_txant_validate(struct wlc_info *wlc, s8 val)
a9533e7e HP	370	{
	371	int bcmerror = BCME_OK;
	372
	373	/* when there is only 1 tx_streams, don't allow to change the txant */
	374	if (WLCISNPHY(wlc->band) && (wlc->stf->txstreams == 1))
	375	return ((val == wlc->stf->txant) ? bcmerror : BCME_RANGE);
	376
	377	switch (val) {
	378	case -1:
	379	val = ANT_TX_DEF;
	380	break;
	381	case 0:
	382	val = ANT_TX_FORCE_0;
	383	break;
	384	case 1:
	385	val = ANT_TX_FORCE_1;
	386	break;
	387	case 3:
	388	val = ANT_TX_LAST_RX;
	389	break;
	390	default:
	391	bcmerror = BCME_RANGE;
	392	break;
	393	}
	394
	395	if (bcmerror == BCME_OK)
562c8850	396	wlc->stf->txant = (s8) val;
a9533e7e HP	397
	398	return bcmerror;
	399
	400	}
	401
	402	/*
	403	* Centralized txant update function. call it whenever wlc->stf->txant and/or wlc->stf->txchain
	404	* change
	405	*
	406	* Antennas are controlled by ucode indirectly, which drives PHY or GPIO to
	407	* achieve various tx/rx antenna selection schemes
	408	*
	409	* legacy phy, bit 6 and bit 7 means antenna 0 and 1 respectively, bit6+bit7 means auto(last rx)
	410	* for NREV<3, bit 6 and bit 7 means antenna 0 and 1 respectively, bit6+bit7 means last rx and
	411	* do tx-antenna selection for SISO transmissions
	412	* for NREV=3, bit 6 and bit _8_ means antenna 0 and 1 respectively, bit6+bit7 means last rx and
	413	* do tx-antenna selection for SISO transmissions
	414	* for NREV>=7, bit 6 and bit 7 mean antenna 0 and 1 respectively, nit6+bit7 means both cores active
	415	*/
c6a9e1fc	416	static void _wlc_stf_phy_txant_upd(struct wlc_info *wlc)
a9533e7e	417	{
562c8850	418	s8 txant;
a9533e7e	419
562c8850	420	txant = (s8) wlc->stf->txant;
a9533e7e HP	421	ASSERT(txant == ANT_TX_FORCE_0 \|\| txant == ANT_TX_FORCE_1
	422	\|\| txant == ANT_TX_LAST_RX);
	423
	424	if (WLC_PHY_11N_CAP(wlc->band)) {
	425	if (txant == ANT_TX_FORCE_0) {
	426	wlc->stf->phytxant = PHY_TXC_ANT_0;
	427	} else if (txant == ANT_TX_FORCE_1) {
	428	wlc->stf->phytxant = PHY_TXC_ANT_1;
	429
	430	if (WLCISNPHY(wlc->band) &&
	431	NREV_GE(wlc->band->phyrev, 3)
	432	&& NREV_LT(wlc->band->phyrev, 7)) {
	433	wlc->stf->phytxant = PHY_TXC_ANT_2;
	434	}
	435	} else {
	436	if (WLCISLCNPHY(wlc->band) \|\| WLCISSSLPNPHY(wlc->band))
	437	wlc->stf->phytxant = PHY_TXC_LCNPHY_ANT_LAST;
	438	else {
	439	/* keep this assert to catch out of sync wlc->stf->txcore */
	440	ASSERT(wlc->stf->txchain > 0);
	441	wlc->stf->phytxant =
	442	wlc->stf->txchain << PHY_TXC_ANT_SHIFT;
	443	}
	444	}
	445	} else {
	446	if (txant == ANT_TX_FORCE_0)
	447	wlc->stf->phytxant = PHY_TXC_OLD_ANT_0;
	448	else if (txant == ANT_TX_FORCE_1)
	449	wlc->stf->phytxant = PHY_TXC_OLD_ANT_1;
	450	else
	451	wlc->stf->phytxant = PHY_TXC_OLD_ANT_LAST;
	452	}
	453
	454	wlc_bmac_txant_set(wlc->hw, wlc->stf->phytxant);
	455	}
	456
c6a9e1fc	457	void wlc_stf_phy_txant_upd(struct wlc_info *wlc)
a9533e7e HP	458	{
	459	_wlc_stf_phy_txant_upd(wlc);
	460	}
	461
c6a9e1fc	462	void wlc_stf_phy_chain_calc(struct wlc_info *wlc)
a2627bc0	463	{
a9533e7e	464	/* get available rx/tx chains */
41feb5ed GKH	465	wlc->stf->hw_txchain = (u8) getintvar(wlc->pub->vars, "txchain");
41feb5ed GKH	466	wlc->stf->hw_rxchain = (u8) getintvar(wlc->pub->vars, "rxchain");
a9533e7e HP	467
	468	/* these parameter are intended to be used for all PHY types */
	469	if (wlc->stf->hw_txchain == 0 \|\| wlc->stf->hw_txchain == 0xf) {
	470	if (WLCISNPHY(wlc->band)) {
	471	wlc->stf->hw_txchain = TXCHAIN_DEF_NPHY;
	472	} else {
	473	wlc->stf->hw_txchain = TXCHAIN_DEF;
	474	}
	475	}
	476
	477	wlc->stf->txchain = wlc->stf->hw_txchain;
41feb5ed	478	wlc->stf->txstreams = (u8) WLC_BITSCNT(wlc->stf->hw_txchain);
a9533e7e HP	479
	480	if (wlc->stf->hw_rxchain == 0 \|\| wlc->stf->hw_rxchain == 0xf) {
	481	if (WLCISNPHY(wlc->band)) {
	482	wlc->stf->hw_rxchain = RXCHAIN_DEF_NPHY;
	483	} else {
	484	wlc->stf->hw_rxchain = RXCHAIN_DEF;
	485	}
	486	}
	487
	488	wlc->stf->rxchain = wlc->stf->hw_rxchain;
41feb5ed	489	wlc->stf->rxstreams = (u8) WLC_BITSCNT(wlc->stf->hw_rxchain);
a9533e7e HP	490
	491	/* initialize the txcore table */
	492	bcopy(txcore_default, wlc->stf->txcore, sizeof(wlc->stf->txcore));
	493
	494	/* default spatial_policy */
	495	wlc->stf->spatial_policy = MIN_SPATIAL_EXPANSION;
	496	wlc_stf_spatial_policy_set(wlc, MIN_SPATIAL_EXPANSION);
	497	}
	498
c6a9e1fc	499	static u16 _wlc_stf_phytxchain_sel(struct wlc_info *wlc, ratespec_t rspec)
a9533e7e	500	{
7d4df48e	501	u16 phytxant = wlc->stf->phytxant;
a9533e7e HP	502
	503	if (RSPEC_STF(rspec) != PHY_TXC1_MODE_SISO) {
	504	ASSERT(wlc->stf->txstreams > 1);
	505	phytxant = wlc->stf->txchain << PHY_TXC_ANT_SHIFT;
	506	} else if (wlc->stf->txant == ANT_TX_DEF)
	507	phytxant = wlc->stf->txchain << PHY_TXC_ANT_SHIFT;
	508	phytxant &= PHY_TXC_ANT_MASK;
	509	return phytxant;
	510	}
	511
c6a9e1fc	512	u16 wlc_stf_phytxchain_sel(struct wlc_info *wlc, ratespec_t rspec)
a9533e7e HP	513	{
	514	return _wlc_stf_phytxchain_sel(wlc, rspec);
	515	}
	516
c6a9e1fc	517	u16 wlc_stf_d11hdrs_phyctl_txant(struct wlc_info *wlc, ratespec_t rspec)
a9533e7e	518	{
7d4df48e GKH	519	u16 phytxant = wlc->stf->phytxant;
7d4df48e GKH	520	u16 mask = PHY_TXC_ANT_MASK;
a9533e7e HP	521
	522	/* for non-siso rates or default setting, use the available chains */
	523	if (WLCISNPHY(wlc->band)) {
	524	ASSERT(wlc->stf->txchain != 0);
	525	phytxant = _wlc_stf_phytxchain_sel(wlc, rspec);
	526	mask = PHY_TXC_HTANT_MASK;
	527	}
	528	phytxant \|= phytxant & mask;
	529	return phytxant;
	530	}