[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 <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_mac80211.h>
#include <wlc_scb.h>
#include <wl_export.h>
#include <wlc_bmac.h>
#include <wlc_stf.h>
#include <wl_dbg.h>

#define MIN_SPATIAL_EXPANSION	0
#define MAX_SPATIAL_EXPANSION	1

#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 */
	memcpy(wlc->stf->txcore, txcore_default, 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>
a9533e7e HP	24	#include <proto/802.11.h>
a9533e7e HP	25	#include <wlioctl.h>
a9533e7e	26	#include <bcmwifi.h>
a52ba66c BR	27	#include <sbhndpio.h>
a52ba66c BR	28	#include <sbhnddma.h>
a9533e7e HP	29	#include <d11.h>
	30	#include <wlc_rate.h>
	31	#include <wlc_pub.h>
	32	#include <wlc_key.h>
	33	#include <wlc_channel.h>
	34	#include <wlc_bsscfg.h>
	35	#include <wlc_mac80211.h>
	36	#include <wlc_scb.h>
	37	#include <wl_export.h>
	38	#include <wlc_bmac.h>
	39	#include <wlc_stf.h>
69ec303a	40	#include <wl_dbg.h>
a9533e7e	41
62b54dca AS	42	#define MIN_SPATIAL_EXPANSION 0
	43	#define MAX_SPATIAL_EXPANSION 1
	44
a9533e7e HP	45	#define WLC_STF_SS_STBC_RX(wlc) (WLCISNPHY(wlc->band) && \
	46	NREV_GT(wlc->band->phyrev, 3) && NREV_LE(wlc->band->phyrev, 6))
	47
c6a9e1fc RV	48	static bool wlc_stf_stbc_tx_set(struct wlc_info *wlc, s32 int_val);
	49	static int wlc_stf_txcore_set(struct wlc_info *wlc, u8 Nsts, u8 val);
	50	static int wlc_stf_spatial_policy_set(struct wlc_info *wlc, int val);
	51	static void wlc_stf_stbc_rx_ht_update(struct wlc_info *wlc, int val);
a9533e7e	52
c6a9e1fc RV	53	static void _wlc_stf_phy_txant_upd(struct wlc_info *wlc);
c6a9e1fc RV	54	static u16 _wlc_stf_phytxchain_sel(struct wlc_info *wlc, ratespec_t rspec);
a9533e7e HP	55
	56	#define NSTS_1 1
	57	#define NSTS_2 2
	58	#define NSTS_3 3
	59	#define NSTS_4 4
41feb5ed	60	const u8 txcore_default[5] = {
a9533e7e HP	61	(0), /* bitmap of the core enabled */
	62	(0x01), /* For Nsts = 1, enable core 1 */
	63	(0x03), /* For Nsts = 2, enable core 1 & 2 */
	64	(0x07), /* For Nsts = 3, enable core 1, 2 & 3 */
	65	(0x0f) /* For Nsts = 4, enable all cores */
	66	};
	67
c6a9e1fc	68	static void wlc_stf_stbc_rx_ht_update(struct wlc_info *wlc, int val)
a9533e7e HP	69	{
	70	ASSERT((val == HT_CAP_RX_STBC_NO)
	71	\|\| (val == HT_CAP_RX_STBC_ONE_STREAM));
	72
	73	/* MIMOPHYs rev3-6 cannot receive STBC with only one rx core active */
	74	if (WLC_STF_SS_STBC_RX(wlc)) {
	75	if ((wlc->stf->rxstreams == 1) && (val != HT_CAP_RX_STBC_NO))
	76	return;
	77	}
	78
651bd3a9 RV	79	wlc->ht_cap.cap_info &= ~HT_CAP_RX_STBC_MASK;
651bd3a9 RV	80	wlc->ht_cap.cap_info \|= (val << HT_CAP_RX_STBC_SHIFT);
a9533e7e HP	81
	82	if (wlc->pub->up) {
	83	wlc_update_beacon(wlc);
0f0881b0	84	wlc_update_probe_resp(wlc, true);
a9533e7e HP	85	}
	86	}
	87
	88	/* every WLC_TEMPSENSE_PERIOD seconds temperature check to decide whether to turn on/off txchain */
c6a9e1fc	89	void wlc_tempsense_upd(struct wlc_info *wlc)
a9533e7e HP	90	{
	91	wlc_phy_t *pi = wlc->band->pi;
	92	uint active_chains, txchain;
	93
	94	/* Check if the chip is too hot. Disable one Tx chain, if it is */
	95	/* high 4 bits are for Rx chain, low 4 bits are for Tx chain */
	96	active_chains = wlc_phy_stf_chain_active_get(pi);
	97	txchain = active_chains & 0xf;
	98
	99	if (wlc->stf->txchain == wlc->stf->hw_txchain) {
	100	if (txchain && (txchain < wlc->stf->hw_txchain)) {
	101	/* turn off 1 tx chain */
0f0881b0	102	wlc_stf_txchain_set(wlc, txchain, true);
a9533e7e HP	103	}
	104	} else if (wlc->stf->txchain < wlc->stf->hw_txchain) {
	105	if (txchain == wlc->stf->hw_txchain) {
	106	/* turn back on txchain */
0f0881b0	107	wlc_stf_txchain_set(wlc, txchain, true);
a9533e7e HP	108	}
	109	}
	110	}
	111
	112	void
c6a9e1fc	113	wlc_stf_ss_algo_channel_get(struct wlc_info wlc, u16 ss_algo_channel,
a9533e7e HP	114	chanspec_t chanspec)
	115	{
	116	tx_power_t power;
41feb5ed	117	u8 siso_mcs_id, cdd_mcs_id, stbc_mcs_id;
a9533e7e HP	118
	119	/* Clear previous settings */
	120	*ss_algo_channel = 0;
	121
	122	if (!wlc->pub->up) {
7d4df48e	123	*ss_algo_channel = (u16) -1;
a9533e7e HP	124	return;
	125	}
	126
	127	wlc_phy_txpower_get_current(wlc->band->pi, &power,
	128	CHSPEC_CHANNEL(chanspec));
	129
	130	siso_mcs_id = (CHSPEC_IS40(chanspec)) ?
	131	WL_TX_POWER_MCS40_SISO_FIRST : WL_TX_POWER_MCS20_SISO_FIRST;
	132	cdd_mcs_id = (CHSPEC_IS40(chanspec)) ?
	133	WL_TX_POWER_MCS40_CDD_FIRST : WL_TX_POWER_MCS20_CDD_FIRST;
	134	stbc_mcs_id = (CHSPEC_IS40(chanspec)) ?
	135	WL_TX_POWER_MCS40_STBC_FIRST : WL_TX_POWER_MCS20_STBC_FIRST;
	136
	137	/* criteria to choose stf mode */
	138
	139	/* the "+3dbm (12 0.25db units)" is to account for the fact that with CDD, tx occurs
	140	* on both chains
	141	*/
	142	if (power.target[siso_mcs_id] > (power.target[cdd_mcs_id] + 12))
	143	setbit(ss_algo_channel, PHY_TXC1_MODE_SISO);
	144	else
	145	setbit(ss_algo_channel, PHY_TXC1_MODE_CDD);
	146
	147	/* STBC is ORed into to algo channel as STBC requires per-packet SCB capability check
	148	* so cannot be default mode of operation. One of SISO, CDD have to be set
	149	*/
	150	if (power.target[siso_mcs_id] <= (power.target[stbc_mcs_id] + 12))
	151	setbit(ss_algo_channel, PHY_TXC1_MODE_STBC);
	152	}
	153
c6a9e1fc	154	static bool wlc_stf_stbc_tx_set(struct wlc_info *wlc, s32 int_val)
a9533e7e HP	155	{
a9533e7e HP	156	if ((int_val != AUTO) && (int_val != OFF) && (int_val != ON)) {
0965ae88	157	return false;
a9533e7e HP	158	}
	159
	160	if ((int_val == ON) && (wlc->stf->txstreams == 1))
0965ae88	161	return false;
a9533e7e HP	162
	163	if ((int_val == OFF) \|\| (wlc->stf->txstreams == 1)
	164	\|\| !WLC_STBC_CAP_PHY(wlc))
651bd3a9	165	wlc->ht_cap.cap_info &= ~IEEE80211_HT_CAP_TX_STBC;
a9533e7e	166	else
651bd3a9	167	wlc->ht_cap.cap_info \|= IEEE80211_HT_CAP_TX_STBC;
a9533e7e	168
562c8850 GKH	169	wlc->bandstate[BAND_2G_INDEX]->band_stf_stbc_tx = (s8) int_val;
562c8850 GKH	170	wlc->bandstate[BAND_5G_INDEX]->band_stf_stbc_tx = (s8) int_val;
a9533e7e	171
0f0881b0	172	return true;
a9533e7e HP	173	}
a9533e7e HP	174
c6a9e1fc	175	bool wlc_stf_stbc_rx_set(struct wlc_info *wlc, s32 int_val)
a9533e7e HP	176	{
	177	if ((int_val != HT_CAP_RX_STBC_NO)
	178	&& (int_val != HT_CAP_RX_STBC_ONE_STREAM)) {
0965ae88	179	return false;
a9533e7e HP	180	}
	181
	182	if (WLC_STF_SS_STBC_RX(wlc)) {
	183	if ((int_val != HT_CAP_RX_STBC_NO)
	184	&& (wlc->stf->rxstreams == 1))
0965ae88	185	return false;
a9533e7e HP	186	}
	187
	188	wlc_stf_stbc_rx_ht_update(wlc, int_val);
0f0881b0	189	return true;
a9533e7e HP	190	}
a9533e7e HP	191
c6a9e1fc	192	static int wlc_stf_txcore_set(struct wlc_info *wlc, u8 Nsts, u8 core_mask)
a9533e7e	193	{
f4528696 JP	194	WL_TRACE("wl%d: %s: Nsts %d core_mask %x\n",
f4528696 JP	195	wlc->pub->unit, __func__, Nsts, core_mask);
a9533e7e HP	196
	197	ASSERT((Nsts > 0) && (Nsts <= MAX_STREAMS_SUPPORTED));
	198
	199	if (WLC_BITSCNT(core_mask) > wlc->stf->txstreams) {
	200	core_mask = 0;
	201	}
	202
	203	if ((WLC_BITSCNT(core_mask) == wlc->stf->txstreams) &&
	204	((core_mask & ~wlc->stf->txchain)
	205	\|\| !(core_mask & wlc->stf->txchain))) {
	206	core_mask = wlc->stf->txchain;
	207	}
	208
	209	ASSERT(!core_mask \|\| Nsts <= WLC_BITSCNT(core_mask));
	210
	211	wlc->stf->txcore[Nsts] = core_mask;
	212	/* Nsts = 1..4, txcore index = 1..4 */
	213	if (Nsts == 1) {
	214	/* Needs to update beacon and ucode generated response
	215	* frames when 1 stream core map changed
	216	*/
	217	wlc->stf->phytxant = core_mask << PHY_TXC_ANT_SHIFT;
	218	wlc_bmac_txant_set(wlc->hw, wlc->stf->phytxant);
	219	if (wlc->clk) {
	220	wlc_suspend_mac_and_wait(wlc);
	221	wlc_beacon_phytxctl_txant_upd(wlc, wlc->bcn_rspec);
	222	wlc_enable_mac(wlc);
	223	}
	224	}
	225
	226	return BCME_OK;
	227	}
	228
c6a9e1fc	229	static int wlc_stf_spatial_policy_set(struct wlc_info *wlc, int val)
a9533e7e HP	230	{
a9533e7e HP	231	int i;
41feb5ed	232	u8 core_mask = 0;
a9533e7e	233
f4528696	234	WL_TRACE("wl%d: %s: val %x\n", wlc->pub->unit, __func__, val);
a9533e7e	235
562c8850	236	wlc->stf->spatial_policy = (s8) val;
a9533e7e HP	237	for (i = 1; i <= MAX_STREAMS_SUPPORTED; i++) {
	238	core_mask = (val == MAX_SPATIAL_EXPANSION) ?
	239	wlc->stf->txchain : txcore_default[i];
41feb5ed	240	wlc_stf_txcore_set(wlc, (u8) i, core_mask);
a9533e7e HP	241	}
	242	return BCME_OK;
	243	}
	244
c6a9e1fc	245	int wlc_stf_txchain_set(struct wlc_info *wlc, s32 int_val, bool force)
a9533e7e	246	{
41feb5ed GKH	247	u8 txchain = (u8) int_val;
41feb5ed GKH	248	u8 txstreams;
a9533e7e HP	249	uint i;
	250
	251	if (wlc->stf->txchain == txchain)
	252	return BCME_OK;
	253
	254	if ((txchain & ~wlc->stf->hw_txchain)
	255	\|\| !(txchain & wlc->stf->hw_txchain))
	256	return BCME_RANGE;
	257
	258	/* if nrate override is configured to be non-SISO STF mode, reject reducing txchain to 1 */
41feb5ed	259	txstreams = (u8) WLC_BITSCNT(txchain);
a9533e7e HP	260	if (txstreams > MAX_STREAMS_SUPPORTED)
	261	return BCME_RANGE;
	262
	263	if (txstreams == 1) {
	264	for (i = 0; i < NBANDS(wlc); i++)
	265	if ((RSPEC_STF(wlc->bandstate[i]->rspec_override) !=
	266	PHY_TXC1_MODE_SISO)
	267	\|\| (RSPEC_STF(wlc->bandstate[i]->mrspec_override) !=
	268	PHY_TXC1_MODE_SISO)) {
	269	if (!force)
	270	return BCME_ERROR;
	271
	272	/* over-write the override rspec */
	273	if (RSPEC_STF(wlc->bandstate[i]->rspec_override)
	274	!= PHY_TXC1_MODE_SISO) {
	275	wlc->bandstate[i]->rspec_override = 0;
f4528696 JP	276	WL_ERROR("%s(): temp sense override non-SISO rspec_override\n",
f4528696 JP	277	__func__);
a9533e7e HP	278	}
	279	if (RSPEC_STF
	280	(wlc->bandstate[i]->mrspec_override) !=
	281	PHY_TXC1_MODE_SISO) {
	282	wlc->bandstate[i]->mrspec_override = 0;
f4528696 JP	283	WL_ERROR("%s(): temp sense override non-SISO mrspec_override\n",
f4528696 JP	284	__func__);
a9533e7e HP	285	}
	286	}
	287	}
	288
	289	wlc->stf->txchain = txchain;
	290	wlc->stf->txstreams = txstreams;
	291	wlc_stf_stbc_tx_set(wlc, wlc->band->band_stf_stbc_tx);
	292	wlc_stf_ss_update(wlc, wlc->bandstate[BAND_2G_INDEX]);
	293	wlc_stf_ss_update(wlc, wlc->bandstate[BAND_5G_INDEX]);
	294	wlc->stf->txant =
	295	(wlc->stf->txstreams == 1) ? ANT_TX_FORCE_0 : ANT_TX_DEF;
	296	_wlc_stf_phy_txant_upd(wlc);
	297
	298	wlc_phy_stf_chain_set(wlc->band->pi, wlc->stf->txchain,
	299	wlc->stf->rxchain);
	300
	301	for (i = 1; i <= MAX_STREAMS_SUPPORTED; i++)
41feb5ed	302	wlc_stf_txcore_set(wlc, (u8) i, txcore_default[i]);
a9533e7e HP	303
	304	return BCME_OK;
	305	}
	306
a9533e7e	307	/* update wlc->stf->ss_opmode which represents the operational stf_ss mode we're using */
f077f718	308	int wlc_stf_ss_update(struct wlc_info wlc, struct wlcband band)
a9533e7e HP	309	{
a9533e7e HP	310	int ret_code = 0;
41feb5ed GKH	311	u8 prev_stf_ss;
41feb5ed GKH	312	u8 upd_stf_ss;
a9533e7e HP	313
	314	prev_stf_ss = wlc->stf->ss_opmode;
	315
	316	/* NOTE: opmode can only be SISO or CDD as STBC is decided on a per-packet basis */
	317	if (WLC_STBC_CAP_PHY(wlc) &&
	318	wlc->stf->ss_algosel_auto
7d4df48e	319	&& (wlc->stf->ss_algo_channel != (u16) -1)) {
a9533e7e HP	320	ASSERT(isset(&wlc->stf->ss_algo_channel, PHY_TXC1_MODE_CDD)
	321	\|\| isset(&wlc->stf->ss_algo_channel,
	322	PHY_TXC1_MODE_SISO));
	323	upd_stf_ss = (wlc->stf->no_cddstbc \|\| (wlc->stf->txstreams == 1)
	324	\|\| isset(&wlc->stf->ss_algo_channel,
	325	PHY_TXC1_MODE_SISO)) ? PHY_TXC1_MODE_SISO
	326	: PHY_TXC1_MODE_CDD;
	327	} else {
	328	if (wlc->band != band)
	329	return ret_code;
	330	upd_stf_ss = (wlc->stf->no_cddstbc
	331	\|\| (wlc->stf->txstreams ==
	332	1)) ? PHY_TXC1_MODE_SISO : band->
	333	band_stf_ss_mode;
	334	}
	335	if (prev_stf_ss != upd_stf_ss) {
	336	wlc->stf->ss_opmode = upd_stf_ss;
	337	wlc_bmac_band_stf_ss_set(wlc->hw, upd_stf_ss);
	338	}
	339
	340	return ret_code;
	341	}
	342
c6a9e1fc	343	int wlc_stf_attach(struct wlc_info *wlc)
a2627bc0	344	{
a9533e7e HP	345	wlc->bandstate[BAND_2G_INDEX]->band_stf_ss_mode = PHY_TXC1_MODE_SISO;
	346	wlc->bandstate[BAND_5G_INDEX]->band_stf_ss_mode = PHY_TXC1_MODE_CDD;
	347
	348	if (WLCISNPHY(wlc->band) &&
	349	(wlc_phy_txpower_hw_ctrl_get(wlc->band->pi) != PHY_TPC_HW_ON))
	350	wlc->bandstate[BAND_2G_INDEX]->band_stf_ss_mode =
	351	PHY_TXC1_MODE_CDD;
	352	wlc_stf_ss_update(wlc, wlc->bandstate[BAND_2G_INDEX]);
	353	wlc_stf_ss_update(wlc, wlc->bandstate[BAND_5G_INDEX]);
	354
	355	wlc_stf_stbc_rx_ht_update(wlc, HT_CAP_RX_STBC_NO);
	356	wlc->bandstate[BAND_2G_INDEX]->band_stf_stbc_tx = OFF;
	357	wlc->bandstate[BAND_5G_INDEX]->band_stf_stbc_tx = OFF;
	358
	359	if (WLC_STBC_CAP_PHY(wlc)) {
0f0881b0	360	wlc->stf->ss_algosel_auto = true;
7d4df48e	361	wlc->stf->ss_algo_channel = (u16) -1; /* Init the default value */
a9533e7e HP	362	}
	363	return 0;
	364	}
	365
c6a9e1fc	366	void wlc_stf_detach(struct wlc_info *wlc)
a2627bc0	367	{
a9533e7e HP	368	}
a9533e7e HP	369
c6a9e1fc	370	int wlc_stf_ant_txant_validate(struct wlc_info *wlc, s8 val)
a9533e7e HP	371	{
	372	int bcmerror = BCME_OK;
	373
	374	/* when there is only 1 tx_streams, don't allow to change the txant */
	375	if (WLCISNPHY(wlc->band) && (wlc->stf->txstreams == 1))
	376	return ((val == wlc->stf->txant) ? bcmerror : BCME_RANGE);
	377
	378	switch (val) {
	379	case -1:
	380	val = ANT_TX_DEF;
	381	break;
	382	case 0:
	383	val = ANT_TX_FORCE_0;
	384	break;
	385	case 1:
	386	val = ANT_TX_FORCE_1;
	387	break;
	388	case 3:
	389	val = ANT_TX_LAST_RX;
	390	break;
	391	default:
	392	bcmerror = BCME_RANGE;
	393	break;
	394	}
	395
	396	if (bcmerror == BCME_OK)
562c8850	397	wlc->stf->txant = (s8) val;
a9533e7e HP	398
	399	return bcmerror;
	400
	401	}
	402
	403	/*
	404	* Centralized txant update function. call it whenever wlc->stf->txant and/or wlc->stf->txchain
	405	* change
	406	*
	407	* Antennas are controlled by ucode indirectly, which drives PHY or GPIO to
	408	* achieve various tx/rx antenna selection schemes
	409	*
	410	* legacy phy, bit 6 and bit 7 means antenna 0 and 1 respectively, bit6+bit7 means auto(last rx)
	411	* for NREV<3, bit 6 and bit 7 means antenna 0 and 1 respectively, bit6+bit7 means last rx and
	412	* do tx-antenna selection for SISO transmissions
	413	* for NREV=3, bit 6 and bit _8_ means antenna 0 and 1 respectively, bit6+bit7 means last rx and
	414	* do tx-antenna selection for SISO transmissions
	415	* for NREV>=7, bit 6 and bit 7 mean antenna 0 and 1 respectively, nit6+bit7 means both cores active
	416	*/
c6a9e1fc	417	static void _wlc_stf_phy_txant_upd(struct wlc_info *wlc)
a9533e7e	418	{
562c8850	419	s8 txant;
a9533e7e	420
562c8850	421	txant = (s8) wlc->stf->txant;
a9533e7e HP	422	ASSERT(txant == ANT_TX_FORCE_0 \|\| txant == ANT_TX_FORCE_1
	423	\|\| txant == ANT_TX_LAST_RX);
	424
	425	if (WLC_PHY_11N_CAP(wlc->band)) {
	426	if (txant == ANT_TX_FORCE_0) {
	427	wlc->stf->phytxant = PHY_TXC_ANT_0;
	428	} else if (txant == ANT_TX_FORCE_1) {
	429	wlc->stf->phytxant = PHY_TXC_ANT_1;
	430
	431	if (WLCISNPHY(wlc->band) &&
	432	NREV_GE(wlc->band->phyrev, 3)
	433	&& NREV_LT(wlc->band->phyrev, 7)) {
	434	wlc->stf->phytxant = PHY_TXC_ANT_2;
	435	}
	436	} else {
	437	if (WLCISLCNPHY(wlc->band) \|\| WLCISSSLPNPHY(wlc->band))
	438	wlc->stf->phytxant = PHY_TXC_LCNPHY_ANT_LAST;
	439	else {
	440	/* keep this assert to catch out of sync wlc->stf->txcore */
	441	ASSERT(wlc->stf->txchain > 0);
	442	wlc->stf->phytxant =
	443	wlc->stf->txchain << PHY_TXC_ANT_SHIFT;
	444	}
	445	}
	446	} else {
	447	if (txant == ANT_TX_FORCE_0)
	448	wlc->stf->phytxant = PHY_TXC_OLD_ANT_0;
	449	else if (txant == ANT_TX_FORCE_1)
	450	wlc->stf->phytxant = PHY_TXC_OLD_ANT_1;
	451	else
	452	wlc->stf->phytxant = PHY_TXC_OLD_ANT_LAST;
	453	}
	454
	455	wlc_bmac_txant_set(wlc->hw, wlc->stf->phytxant);
	456	}
	457
c6a9e1fc	458	void wlc_stf_phy_txant_upd(struct wlc_info *wlc)
a9533e7e HP	459	{
	460	_wlc_stf_phy_txant_upd(wlc);
	461	}
	462
c6a9e1fc	463	void wlc_stf_phy_chain_calc(struct wlc_info *wlc)
a2627bc0	464	{
a9533e7e	465	/* get available rx/tx chains */
41feb5ed GKH	466	wlc->stf->hw_txchain = (u8) getintvar(wlc->pub->vars, "txchain");
41feb5ed GKH	467	wlc->stf->hw_rxchain = (u8) getintvar(wlc->pub->vars, "rxchain");
a9533e7e HP	468
	469	/* these parameter are intended to be used for all PHY types */
	470	if (wlc->stf->hw_txchain == 0 \|\| wlc->stf->hw_txchain == 0xf) {
	471	if (WLCISNPHY(wlc->band)) {
	472	wlc->stf->hw_txchain = TXCHAIN_DEF_NPHY;
	473	} else {
	474	wlc->stf->hw_txchain = TXCHAIN_DEF;
	475	}
	476	}
	477
	478	wlc->stf->txchain = wlc->stf->hw_txchain;
41feb5ed	479	wlc->stf->txstreams = (u8) WLC_BITSCNT(wlc->stf->hw_txchain);
a9533e7e HP	480
	481	if (wlc->stf->hw_rxchain == 0 \|\| wlc->stf->hw_rxchain == 0xf) {
	482	if (WLCISNPHY(wlc->band)) {
	483	wlc->stf->hw_rxchain = RXCHAIN_DEF_NPHY;
	484	} else {
	485	wlc->stf->hw_rxchain = RXCHAIN_DEF;
	486	}
	487	}
	488
	489	wlc->stf->rxchain = wlc->stf->hw_rxchain;
41feb5ed	490	wlc->stf->rxstreams = (u8) WLC_BITSCNT(wlc->stf->hw_rxchain);
a9533e7e HP	491
a9533e7e HP	492	/* initialize the txcore table */
02160695	493	memcpy(wlc->stf->txcore, txcore_default, sizeof(wlc->stf->txcore));
a9533e7e HP	494
	495	/* default spatial_policy */
	496	wlc->stf->spatial_policy = MIN_SPATIAL_EXPANSION;
	497	wlc_stf_spatial_policy_set(wlc, MIN_SPATIAL_EXPANSION);
	498	}
	499
c6a9e1fc	500	static u16 _wlc_stf_phytxchain_sel(struct wlc_info *wlc, ratespec_t rspec)
a9533e7e	501	{
7d4df48e	502	u16 phytxant = wlc->stf->phytxant;
a9533e7e HP	503
	504	if (RSPEC_STF(rspec) != PHY_TXC1_MODE_SISO) {
	505	ASSERT(wlc->stf->txstreams > 1);
	506	phytxant = wlc->stf->txchain << PHY_TXC_ANT_SHIFT;
	507	} else if (wlc->stf->txant == ANT_TX_DEF)
	508	phytxant = wlc->stf->txchain << PHY_TXC_ANT_SHIFT;
	509	phytxant &= PHY_TXC_ANT_MASK;
	510	return phytxant;
	511	}
	512
c6a9e1fc	513	u16 wlc_stf_phytxchain_sel(struct wlc_info *wlc, ratespec_t rspec)
a9533e7e HP	514	{
	515	return _wlc_stf_phytxchain_sel(wlc, rspec);
	516	}
	517
c6a9e1fc	518	u16 wlc_stf_d11hdrs_phyctl_txant(struct wlc_info *wlc, ratespec_t rspec)
a9533e7e	519	{
7d4df48e GKH	520	u16 phytxant = wlc->stf->phytxant;
7d4df48e GKH	521	u16 mask = PHY_TXC_ANT_MASK;
a9533e7e HP	522
	523	/* for non-siso rates or default setting, use the available chains */
	524	if (WLCISNPHY(wlc->band)) {
	525	ASSERT(wlc->stf->txchain != 0);
	526	phytxant = _wlc_stf_phytxchain_sel(wlc, rspec);
	527	mask = PHY_TXC_HTANT_MASK;
	528	}
	529	phytxant \|= phytxant & mask;
	530	return phytxant;
	531	}