[deliverable/linux.git] / drivers / staging / brcm80211 / brcmsmac / 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 <net/mac80211.h>

#include "types.h"
#include "d11.h"
#include "rate.h"
#include "phy/phy_hal.h"
#include "channel.h"
#include "main.h"
#include "bmac.h"
#include "stf.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)
{
	/* 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 &= ~IEEE80211_HT_CAP_RX_STBC;
	wlc->ht_cap.cap_info |= (val << IEEE80211_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)
{
	BCMMSG(wlc->wiphy, "wl%d: Nsts %d core_mask %x\n",
		 wlc->pub->unit, Nsts, core_mask);

	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;
	}

	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 0;
}

static int wlc_stf_spatial_policy_set(struct wlc_info *wlc, int val)
{
	int i;
	u8 core_mask = 0;

	BCMMSG(wlc->wiphy, "wl%d: val %x\n", wlc->pub->unit, 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 0;
}

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 0;

	if ((txchain & ~wlc->stf->hw_txchain)
	    || !(txchain & wlc->stf->hw_txchain))
		return -EINVAL;

	/* 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 -EINVAL;

	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 -EBADE;

				/* over-write the override rspec */
				if (RSPEC_STF(wlc->bandstate[i]->rspec_override)
				    != PHY_TXC1_MODE_SISO) {
					wlc->bandstate[i]->rspec_override = 0;
					wiphy_err(wlc->wiphy, "%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;
					wiphy_err(wlc->wiphy, "%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 0;
}

/* 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)) {
		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)
{
}

/*
 * 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;
	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 {
				/* catch out of sync wlc->stf->txcore */
				WARN_ON(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) {
		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)) {
		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
3bec7bb9	17	#include <net/mac80211.h>
45575664	18
cc3cea5a	19	#include "types.h"
45575664	20	#include "d11.h"
cc3cea5a	21	#include "rate.h"
cc3cea5a RV	22	#include "phy/phy_hal.h"
	23	#include "channel.h"
	24	#include "main.h"
225fa52c	25	#include "bmac.h"
cc3cea5a	26	#include "stf.h"
a9533e7e	27
62b54dca AS	28	#define MIN_SPATIAL_EXPANSION 0
	29	#define MAX_SPATIAL_EXPANSION 1
	30
a9533e7e HP	31	#define WLC_STF_SS_STBC_RX(wlc) (WLCISNPHY(wlc->band) && \
	32	NREV_GT(wlc->band->phyrev, 3) && NREV_LE(wlc->band->phyrev, 6))
	33
c6a9e1fc RV	34	static bool wlc_stf_stbc_tx_set(struct wlc_info *wlc, s32 int_val);
	35	static int wlc_stf_txcore_set(struct wlc_info *wlc, u8 Nsts, u8 val);
	36	static int wlc_stf_spatial_policy_set(struct wlc_info *wlc, int val);
	37	static void wlc_stf_stbc_rx_ht_update(struct wlc_info *wlc, int val);
a9533e7e	38
c6a9e1fc RV	39	static void _wlc_stf_phy_txant_upd(struct wlc_info *wlc);
c6a9e1fc RV	40	static u16 _wlc_stf_phytxchain_sel(struct wlc_info *wlc, ratespec_t rspec);
a9533e7e HP	41
	42	#define NSTS_1 1
	43	#define NSTS_2 2
	44	#define NSTS_3 3
	45	#define NSTS_4 4
41feb5ed	46	const u8 txcore_default[5] = {
a9533e7e HP	47	(0), /* bitmap of the core enabled */
	48	(0x01), /* For Nsts = 1, enable core 1 */
	49	(0x03), /* For Nsts = 2, enable core 1 & 2 */
	50	(0x07), /* For Nsts = 3, enable core 1, 2 & 3 */
	51	(0x0f) /* For Nsts = 4, enable all cores */
	52	};
	53
c6a9e1fc	54	static void wlc_stf_stbc_rx_ht_update(struct wlc_info *wlc, int val)
a9533e7e	55	{
a9533e7e HP	56	/* MIMOPHYs rev3-6 cannot receive STBC with only one rx core active */
	57	if (WLC_STF_SS_STBC_RX(wlc)) {
	58	if ((wlc->stf->rxstreams == 1) && (val != HT_CAP_RX_STBC_NO))
	59	return;
	60	}
	61
f4728c38 SF	62	wlc->ht_cap.cap_info &= ~IEEE80211_HT_CAP_RX_STBC;
f4728c38 SF	63	wlc->ht_cap.cap_info \|= (val << IEEE80211_HT_CAP_RX_STBC_SHIFT);
a9533e7e HP	64
	65	if (wlc->pub->up) {
	66	wlc_update_beacon(wlc);
0f0881b0	67	wlc_update_probe_resp(wlc, true);
a9533e7e HP	68	}
	69	}
	70
	71	/* every WLC_TEMPSENSE_PERIOD seconds temperature check to decide whether to turn on/off txchain */
c6a9e1fc	72	void wlc_tempsense_upd(struct wlc_info *wlc)
a9533e7e HP	73	{
	74	wlc_phy_t *pi = wlc->band->pi;
	75	uint active_chains, txchain;
	76
	77	/* Check if the chip is too hot. Disable one Tx chain, if it is */
	78	/* high 4 bits are for Rx chain, low 4 bits are for Tx chain */
	79	active_chains = wlc_phy_stf_chain_active_get(pi);
	80	txchain = active_chains & 0xf;
	81
	82	if (wlc->stf->txchain == wlc->stf->hw_txchain) {
	83	if (txchain && (txchain < wlc->stf->hw_txchain)) {
	84	/* turn off 1 tx chain */
0f0881b0	85	wlc_stf_txchain_set(wlc, txchain, true);
a9533e7e HP	86	}
	87	} else if (wlc->stf->txchain < wlc->stf->hw_txchain) {
	88	if (txchain == wlc->stf->hw_txchain) {
	89	/* turn back on txchain */
0f0881b0	90	wlc_stf_txchain_set(wlc, txchain, true);
a9533e7e HP	91	}
	92	}
	93	}
	94
	95	void
c6a9e1fc	96	wlc_stf_ss_algo_channel_get(struct wlc_info wlc, u16 ss_algo_channel,
a9533e7e HP	97	chanspec_t chanspec)
	98	{
	99	tx_power_t power;
41feb5ed	100	u8 siso_mcs_id, cdd_mcs_id, stbc_mcs_id;
a9533e7e HP	101
	102	/* Clear previous settings */
	103	*ss_algo_channel = 0;
	104
	105	if (!wlc->pub->up) {
7d4df48e	106	*ss_algo_channel = (u16) -1;
a9533e7e HP	107	return;
	108	}
	109
	110	wlc_phy_txpower_get_current(wlc->band->pi, &power,
	111	CHSPEC_CHANNEL(chanspec));
	112
	113	siso_mcs_id = (CHSPEC_IS40(chanspec)) ?
	114	WL_TX_POWER_MCS40_SISO_FIRST : WL_TX_POWER_MCS20_SISO_FIRST;
	115	cdd_mcs_id = (CHSPEC_IS40(chanspec)) ?
	116	WL_TX_POWER_MCS40_CDD_FIRST : WL_TX_POWER_MCS20_CDD_FIRST;
	117	stbc_mcs_id = (CHSPEC_IS40(chanspec)) ?
	118	WL_TX_POWER_MCS40_STBC_FIRST : WL_TX_POWER_MCS20_STBC_FIRST;
	119
	120	/* criteria to choose stf mode */
	121
	122	/* the "+3dbm (12 0.25db units)" is to account for the fact that with CDD, tx occurs
	123	* on both chains
	124	*/
	125	if (power.target[siso_mcs_id] > (power.target[cdd_mcs_id] + 12))
	126	setbit(ss_algo_channel, PHY_TXC1_MODE_SISO);
	127	else
	128	setbit(ss_algo_channel, PHY_TXC1_MODE_CDD);
	129
	130	/* STBC is ORed into to algo channel as STBC requires per-packet SCB capability check
	131	* so cannot be default mode of operation. One of SISO, CDD have to be set
	132	*/
	133	if (power.target[siso_mcs_id] <= (power.target[stbc_mcs_id] + 12))
	134	setbit(ss_algo_channel, PHY_TXC1_MODE_STBC);
	135	}
	136
c6a9e1fc	137	static bool wlc_stf_stbc_tx_set(struct wlc_info *wlc, s32 int_val)
a9533e7e HP	138	{
a9533e7e HP	139	if ((int_val != AUTO) && (int_val != OFF) && (int_val != ON)) {
0965ae88	140	return false;
a9533e7e HP	141	}
	142
	143	if ((int_val == ON) && (wlc->stf->txstreams == 1))
0965ae88	144	return false;
a9533e7e HP	145
	146	if ((int_val == OFF) \|\| (wlc->stf->txstreams == 1)
	147	\|\| !WLC_STBC_CAP_PHY(wlc))
651bd3a9	148	wlc->ht_cap.cap_info &= ~IEEE80211_HT_CAP_TX_STBC;
a9533e7e	149	else
651bd3a9	150	wlc->ht_cap.cap_info \|= IEEE80211_HT_CAP_TX_STBC;
a9533e7e	151
562c8850 GKH	152	wlc->bandstate[BAND_2G_INDEX]->band_stf_stbc_tx = (s8) int_val;
562c8850 GKH	153	wlc->bandstate[BAND_5G_INDEX]->band_stf_stbc_tx = (s8) int_val;
a9533e7e	154
0f0881b0	155	return true;
a9533e7e HP	156	}
a9533e7e HP	157
c6a9e1fc	158	bool wlc_stf_stbc_rx_set(struct wlc_info *wlc, s32 int_val)
a9533e7e HP	159	{
	160	if ((int_val != HT_CAP_RX_STBC_NO)
	161	&& (int_val != HT_CAP_RX_STBC_ONE_STREAM)) {
0965ae88	162	return false;
a9533e7e HP	163	}
	164
	165	if (WLC_STF_SS_STBC_RX(wlc)) {
	166	if ((int_val != HT_CAP_RX_STBC_NO)
	167	&& (wlc->stf->rxstreams == 1))
0965ae88	168	return false;
a9533e7e HP	169	}
	170
	171	wlc_stf_stbc_rx_ht_update(wlc, int_val);
0f0881b0	172	return true;
a9533e7e HP	173	}
a9533e7e HP	174
c6a9e1fc	175	static int wlc_stf_txcore_set(struct wlc_info *wlc, u8 Nsts, u8 core_mask)
a9533e7e	176	{
792aa408 RV	177	BCMMSG(wlc->wiphy, "wl%d: Nsts %d core_mask %x\n",
792aa408 RV	178	wlc->pub->unit, Nsts, core_mask);
a9533e7e	179
a9533e7e HP	180	if (WLC_BITSCNT(core_mask) > wlc->stf->txstreams) {
	181	core_mask = 0;
	182	}
	183
	184	if ((WLC_BITSCNT(core_mask) == wlc->stf->txstreams) &&
	185	((core_mask & ~wlc->stf->txchain)
	186	\|\| !(core_mask & wlc->stf->txchain))) {
	187	core_mask = wlc->stf->txchain;
	188	}
	189
a9533e7e HP	190	wlc->stf->txcore[Nsts] = core_mask;
	191	/* Nsts = 1..4, txcore index = 1..4 */
	192	if (Nsts == 1) {
	193	/* Needs to update beacon and ucode generated response
	194	* frames when 1 stream core map changed
	195	*/
	196	wlc->stf->phytxant = core_mask << PHY_TXC_ANT_SHIFT;
	197	wlc_bmac_txant_set(wlc->hw, wlc->stf->phytxant);
	198	if (wlc->clk) {
	199	wlc_suspend_mac_and_wait(wlc);
	200	wlc_beacon_phytxctl_txant_upd(wlc, wlc->bcn_rspec);
	201	wlc_enable_mac(wlc);
	202	}
	203	}
	204
a1c5ad81	205	return 0;
a9533e7e HP	206	}
a9533e7e HP	207
c6a9e1fc	208	static int wlc_stf_spatial_policy_set(struct wlc_info *wlc, int val)
a9533e7e HP	209	{
a9533e7e HP	210	int i;
41feb5ed	211	u8 core_mask = 0;
a9533e7e	212
792aa408	213	BCMMSG(wlc->wiphy, "wl%d: val %x\n", wlc->pub->unit, val);
a9533e7e	214
562c8850	215	wlc->stf->spatial_policy = (s8) val;
a9533e7e HP	216	for (i = 1; i <= MAX_STREAMS_SUPPORTED; i++) {
	217	core_mask = (val == MAX_SPATIAL_EXPANSION) ?
	218	wlc->stf->txchain : txcore_default[i];
41feb5ed	219	wlc_stf_txcore_set(wlc, (u8) i, core_mask);
a9533e7e	220	}
a1c5ad81	221	return 0;
a9533e7e HP	222	}
a9533e7e HP	223
c6a9e1fc	224	int wlc_stf_txchain_set(struct wlc_info *wlc, s32 int_val, bool force)
a9533e7e	225	{
41feb5ed GKH	226	u8 txchain = (u8) int_val;
41feb5ed GKH	227	u8 txstreams;
a9533e7e HP	228	uint i;
	229
	230	if (wlc->stf->txchain == txchain)
a1c5ad81	231	return 0;
a9533e7e HP	232
	233	if ((txchain & ~wlc->stf->hw_txchain)
	234	\|\| !(txchain & wlc->stf->hw_txchain))
b74ac12e	235	return -EINVAL;
a9533e7e HP	236
a9533e7e HP	237	/* if nrate override is configured to be non-SISO STF mode, reject reducing txchain to 1 */
41feb5ed	238	txstreams = (u8) WLC_BITSCNT(txchain);
a9533e7e	239	if (txstreams > MAX_STREAMS_SUPPORTED)
b74ac12e	240	return -EINVAL;
a9533e7e HP	241
	242	if (txstreams == 1) {
	243	for (i = 0; i < NBANDS(wlc); i++)
	244	if ((RSPEC_STF(wlc->bandstate[i]->rspec_override) !=
	245	PHY_TXC1_MODE_SISO)
	246	\|\| (RSPEC_STF(wlc->bandstate[i]->mrspec_override) !=
	247	PHY_TXC1_MODE_SISO)) {
	248	if (!force)
b74ac12e	249	return -EBADE;
a9533e7e HP	250
	251	/* over-write the override rspec */
	252	if (RSPEC_STF(wlc->bandstate[i]->rspec_override)
	253	!= PHY_TXC1_MODE_SISO) {
	254	wlc->bandstate[i]->rspec_override = 0;
09a48470 RV	255	wiphy_err(wlc->wiphy, "%s(): temp "
	256	"sense override non-SISO "
	257	"rspec_override\n",
	258	__func__);
a9533e7e HP	259	}
	260	if (RSPEC_STF
	261	(wlc->bandstate[i]->mrspec_override) !=
	262	PHY_TXC1_MODE_SISO) {
	263	wlc->bandstate[i]->mrspec_override = 0;
09a48470 RV	264	wiphy_err(wlc->wiphy, "%s(): temp "
	265	"sense override non-SISO "
	266	"mrspec_override\n",
	267	__func__);
a9533e7e HP	268	}
	269	}
	270	}
	271
	272	wlc->stf->txchain = txchain;
	273	wlc->stf->txstreams = txstreams;
	274	wlc_stf_stbc_tx_set(wlc, wlc->band->band_stf_stbc_tx);
	275	wlc_stf_ss_update(wlc, wlc->bandstate[BAND_2G_INDEX]);
	276	wlc_stf_ss_update(wlc, wlc->bandstate[BAND_5G_INDEX]);
	277	wlc->stf->txant =
	278	(wlc->stf->txstreams == 1) ? ANT_TX_FORCE_0 : ANT_TX_DEF;
	279	_wlc_stf_phy_txant_upd(wlc);
	280
	281	wlc_phy_stf_chain_set(wlc->band->pi, wlc->stf->txchain,
	282	wlc->stf->rxchain);
	283
	284	for (i = 1; i <= MAX_STREAMS_SUPPORTED; i++)
41feb5ed	285	wlc_stf_txcore_set(wlc, (u8) i, txcore_default[i]);
a9533e7e	286
a1c5ad81	287	return 0;
a9533e7e HP	288	}
a9533e7e HP	289
a9533e7e	290	/* update wlc->stf->ss_opmode which represents the operational stf_ss mode we're using */
f077f718	291	int wlc_stf_ss_update(struct wlc_info wlc, struct wlcband band)
a9533e7e HP	292	{
a9533e7e HP	293	int ret_code = 0;
41feb5ed GKH	294	u8 prev_stf_ss;
41feb5ed GKH	295	u8 upd_stf_ss;
a9533e7e HP	296
	297	prev_stf_ss = wlc->stf->ss_opmode;
	298
	299	/* NOTE: opmode can only be SISO or CDD as STBC is decided on a per-packet basis */
	300	if (WLC_STBC_CAP_PHY(wlc) &&
	301	wlc->stf->ss_algosel_auto
7d4df48e	302	&& (wlc->stf->ss_algo_channel != (u16) -1)) {
a9533e7e HP	303	upd_stf_ss = (wlc->stf->no_cddstbc \|\| (wlc->stf->txstreams == 1)
	304	\|\| isset(&wlc->stf->ss_algo_channel,
	305	PHY_TXC1_MODE_SISO)) ? PHY_TXC1_MODE_SISO
	306	: PHY_TXC1_MODE_CDD;
	307	} else {
	308	if (wlc->band != band)
	309	return ret_code;
	310	upd_stf_ss = (wlc->stf->no_cddstbc
	311	\|\| (wlc->stf->txstreams ==
	312	1)) ? PHY_TXC1_MODE_SISO : band->
	313	band_stf_ss_mode;
	314	}
	315	if (prev_stf_ss != upd_stf_ss) {
	316	wlc->stf->ss_opmode = upd_stf_ss;
	317	wlc_bmac_band_stf_ss_set(wlc->hw, upd_stf_ss);
	318	}
	319
	320	return ret_code;
	321	}
	322
c6a9e1fc	323	int wlc_stf_attach(struct wlc_info *wlc)
a2627bc0	324	{
a9533e7e HP	325	wlc->bandstate[BAND_2G_INDEX]->band_stf_ss_mode = PHY_TXC1_MODE_SISO;
	326	wlc->bandstate[BAND_5G_INDEX]->band_stf_ss_mode = PHY_TXC1_MODE_CDD;
	327
	328	if (WLCISNPHY(wlc->band) &&
	329	(wlc_phy_txpower_hw_ctrl_get(wlc->band->pi) != PHY_TPC_HW_ON))
	330	wlc->bandstate[BAND_2G_INDEX]->band_stf_ss_mode =
	331	PHY_TXC1_MODE_CDD;
	332	wlc_stf_ss_update(wlc, wlc->bandstate[BAND_2G_INDEX]);
	333	wlc_stf_ss_update(wlc, wlc->bandstate[BAND_5G_INDEX]);
	334
	335	wlc_stf_stbc_rx_ht_update(wlc, HT_CAP_RX_STBC_NO);
	336	wlc->bandstate[BAND_2G_INDEX]->band_stf_stbc_tx = OFF;
	337	wlc->bandstate[BAND_5G_INDEX]->band_stf_stbc_tx = OFF;
	338
	339	if (WLC_STBC_CAP_PHY(wlc)) {
0f0881b0	340	wlc->stf->ss_algosel_auto = true;
7d4df48e	341	wlc->stf->ss_algo_channel = (u16) -1; /* Init the default value */
a9533e7e HP	342	}
	343	return 0;
	344	}
	345
c6a9e1fc	346	void wlc_stf_detach(struct wlc_info *wlc)
a2627bc0	347	{
a9533e7e HP	348	}
a9533e7e HP	349
a9533e7e HP	350	/*
	351	* Centralized txant update function. call it whenever wlc->stf->txant and/or wlc->stf->txchain
	352	* change
	353	*
	354	* Antennas are controlled by ucode indirectly, which drives PHY or GPIO to
	355	* achieve various tx/rx antenna selection schemes
	356	*
	357	* legacy phy, bit 6 and bit 7 means antenna 0 and 1 respectively, bit6+bit7 means auto(last rx)
	358	* for NREV<3, bit 6 and bit 7 means antenna 0 and 1 respectively, bit6+bit7 means last rx and
	359	* do tx-antenna selection for SISO transmissions
	360	* for NREV=3, bit 6 and bit _8_ means antenna 0 and 1 respectively, bit6+bit7 means last rx and
	361	* do tx-antenna selection for SISO transmissions
	362	* for NREV>=7, bit 6 and bit 7 mean antenna 0 and 1 respectively, nit6+bit7 means both cores active
	363	*/
c6a9e1fc	364	static void _wlc_stf_phy_txant_upd(struct wlc_info *wlc)
a9533e7e	365	{
562c8850	366	s8 txant;
a9533e7e	367
562c8850	368	txant = (s8) wlc->stf->txant;
a9533e7e HP	369	if (WLC_PHY_11N_CAP(wlc->band)) {
	370	if (txant == ANT_TX_FORCE_0) {
	371	wlc->stf->phytxant = PHY_TXC_ANT_0;
	372	} else if (txant == ANT_TX_FORCE_1) {
	373	wlc->stf->phytxant = PHY_TXC_ANT_1;
	374
	375	if (WLCISNPHY(wlc->band) &&
	376	NREV_GE(wlc->band->phyrev, 3)
	377	&& NREV_LT(wlc->band->phyrev, 7)) {
	378	wlc->stf->phytxant = PHY_TXC_ANT_2;
	379	}
	380	} else {
	381	if (WLCISLCNPHY(wlc->band) \|\| WLCISSSLPNPHY(wlc->band))
	382	wlc->stf->phytxant = PHY_TXC_LCNPHY_ANT_LAST;
	383	else {
5dfa128f RV	384	/* catch out of sync wlc->stf->txcore */
5dfa128f RV	385	WARN_ON(wlc->stf->txchain <= 0);
a9533e7e HP	386	wlc->stf->phytxant =
	387	wlc->stf->txchain << PHY_TXC_ANT_SHIFT;
	388	}
	389	}
	390	} else {
	391	if (txant == ANT_TX_FORCE_0)
	392	wlc->stf->phytxant = PHY_TXC_OLD_ANT_0;
	393	else if (txant == ANT_TX_FORCE_1)
	394	wlc->stf->phytxant = PHY_TXC_OLD_ANT_1;
	395	else
	396	wlc->stf->phytxant = PHY_TXC_OLD_ANT_LAST;
	397	}
	398
	399	wlc_bmac_txant_set(wlc->hw, wlc->stf->phytxant);
	400	}
	401
c6a9e1fc	402	void wlc_stf_phy_txant_upd(struct wlc_info *wlc)
a9533e7e HP	403	{
	404	_wlc_stf_phy_txant_upd(wlc);
	405	}
	406
c6a9e1fc	407	void wlc_stf_phy_chain_calc(struct wlc_info *wlc)
a2627bc0	408	{
a9533e7e	409	/* get available rx/tx chains */
41feb5ed GKH	410	wlc->stf->hw_txchain = (u8) getintvar(wlc->pub->vars, "txchain");
41feb5ed GKH	411	wlc->stf->hw_rxchain = (u8) getintvar(wlc->pub->vars, "rxchain");
a9533e7e HP	412
	413	/* these parameter are intended to be used for all PHY types */
	414	if (wlc->stf->hw_txchain == 0 \|\| wlc->stf->hw_txchain == 0xf) {
	415	if (WLCISNPHY(wlc->band)) {
	416	wlc->stf->hw_txchain = TXCHAIN_DEF_NPHY;
	417	} else {
	418	wlc->stf->hw_txchain = TXCHAIN_DEF;
	419	}
	420	}
	421
	422	wlc->stf->txchain = wlc->stf->hw_txchain;
41feb5ed	423	wlc->stf->txstreams = (u8) WLC_BITSCNT(wlc->stf->hw_txchain);
a9533e7e HP	424
	425	if (wlc->stf->hw_rxchain == 0 \|\| wlc->stf->hw_rxchain == 0xf) {
	426	if (WLCISNPHY(wlc->band)) {
	427	wlc->stf->hw_rxchain = RXCHAIN_DEF_NPHY;
	428	} else {
	429	wlc->stf->hw_rxchain = RXCHAIN_DEF;
	430	}
	431	}
	432
	433	wlc->stf->rxchain = wlc->stf->hw_rxchain;
41feb5ed	434	wlc->stf->rxstreams = (u8) WLC_BITSCNT(wlc->stf->hw_rxchain);
a9533e7e HP	435
a9533e7e HP	436	/* initialize the txcore table */
02160695	437	memcpy(wlc->stf->txcore, txcore_default, sizeof(wlc->stf->txcore));
a9533e7e HP	438
	439	/* default spatial_policy */
	440	wlc->stf->spatial_policy = MIN_SPATIAL_EXPANSION;
	441	wlc_stf_spatial_policy_set(wlc, MIN_SPATIAL_EXPANSION);
	442	}
	443
c6a9e1fc	444	static u16 _wlc_stf_phytxchain_sel(struct wlc_info *wlc, ratespec_t rspec)
a9533e7e	445	{
7d4df48e	446	u16 phytxant = wlc->stf->phytxant;
a9533e7e HP	447
a9533e7e HP	448	if (RSPEC_STF(rspec) != PHY_TXC1_MODE_SISO) {
a9533e7e HP	449	phytxant = wlc->stf->txchain << PHY_TXC_ANT_SHIFT;
	450	} else if (wlc->stf->txant == ANT_TX_DEF)
	451	phytxant = wlc->stf->txchain << PHY_TXC_ANT_SHIFT;
	452	phytxant &= PHY_TXC_ANT_MASK;
	453	return phytxant;
	454	}
	455
c6a9e1fc	456	u16 wlc_stf_phytxchain_sel(struct wlc_info *wlc, ratespec_t rspec)
a9533e7e HP	457	{
	458	return _wlc_stf_phytxchain_sel(wlc, rspec);
	459	}
	460
c6a9e1fc	461	u16 wlc_stf_d11hdrs_phyctl_txant(struct wlc_info *wlc, ratespec_t rspec)
a9533e7e	462	{
7d4df48e GKH	463	u16 phytxant = wlc->stf->phytxant;
7d4df48e GKH	464	u16 mask = PHY_TXC_ANT_MASK;
a9533e7e HP	465
	466	/* for non-siso rates or default setting, use the available chains */
	467	if (WLCISNPHY(wlc->band)) {
a9533e7e HP	468	phytxant = _wlc_stf_phytxchain_sel(wlc, rspec);
	469	mask = PHY_TXC_HTANT_MASK;
	470	}
	471	phytxant \|= phytxant & mask;
	472	return phytxant;
	473	}