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/*
* Copyright (c) 2002-2008 Sam Leffler, Errno Consulting
* Copyright (c) 2002-2008 Atheros Communications, Inc.
*
* 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.
*
* $FreeBSD$
*/
#include "opt_ah.h"
#include "ah.h"
#include "ah_internal.h"
#include "ar5416/ar5416.h"
#include "ar5416/ar5416reg.h"
#include "ar5416/ar5416phy.h"
#define TU_TO_USEC(_tu) ((_tu) << 10)
#define ONE_EIGHTH_TU_TO_USEC(_tu8) ((_tu8) << 7)
/*
* Return the hardware NextTBTT in TSF
*/
uint64_t
ar5416GetNextTBTT(struct ath_hal *ah)
{
return OS_REG_READ(ah, AR_NEXT_TBTT);
}
/*
* Initialize all of the hardware registers used to
* send beacons. Note that for station operation the
* driver calls ar5416SetStaBeaconTimers instead.
*/
void
ar5416SetBeaconTimers(struct ath_hal *ah, const HAL_BEACON_TIMERS *bt)
{
uint32_t bperiod;
struct ath_hal_5212 *ahp = AH5212(ah);
OS_REG_WRITE(ah, AR_NEXT_TBTT, TU_TO_USEC(bt->bt_nexttbtt));
OS_REG_WRITE(ah, AR_NEXT_DBA, ONE_EIGHTH_TU_TO_USEC(bt->bt_nextdba));
OS_REG_WRITE(ah, AR_NEXT_SWBA, ONE_EIGHTH_TU_TO_USEC(bt->bt_nextswba));
OS_REG_WRITE(ah, AR_NEXT_NDP, TU_TO_USEC(bt->bt_nextatim));
bperiod = TU_TO_USEC(bt->bt_intval & HAL_BEACON_PERIOD);
ahp->ah_beaconInterval = bt->bt_intval & HAL_BEACON_PERIOD;
OS_REG_WRITE(ah, AR5416_BEACON_PERIOD, bperiod);
OS_REG_WRITE(ah, AR_DBA_PERIOD, bperiod);
OS_REG_WRITE(ah, AR_SWBA_PERIOD, bperiod);
OS_REG_WRITE(ah, AR_NDP_PERIOD, bperiod);
/*
* Reset TSF if required.
*/
if (bt->bt_intval & AR_BEACON_RESET_TSF)
ar5416ResetTsf(ah);
/* enable timers */
/* NB: flags == 0 handled specially for backwards compatibility */
OS_REG_SET_BIT(ah, AR_TIMER_MODE,
bt->bt_flags != 0 ? bt->bt_flags :
AR_TIMER_MODE_TBTT | AR_TIMER_MODE_DBA | AR_TIMER_MODE_SWBA);
}
/*
* Initializes all of the hardware registers used to
* send beacons. Note that for station operation the
* driver calls ar5212SetStaBeaconTimers instead.
*/
void
ar5416BeaconInit(struct ath_hal *ah,
uint32_t next_beacon, uint32_t beacon_period)
{
HAL_BEACON_TIMERS bt;
bt.bt_nexttbtt = next_beacon;
/*
* TIMER1: in AP/adhoc mode this controls the DMA beacon
* alert timer; otherwise it controls the next wakeup time.
* TIMER2: in AP mode, it controls the SBA beacon alert
* interrupt; otherwise it sets the start of the next CFP.
*/
bt.bt_flags = 0;
switch (AH_PRIVATE(ah)->ah_opmode) {
case HAL_M_STA:
case HAL_M_MONITOR:
bt.bt_nextdba = 0xffff;
bt.bt_nextswba = 0x7ffff;
bt.bt_flags |= AR_TIMER_MODE_TBTT;
break;
case HAL_M_IBSS:
OS_REG_SET_BIT(ah, AR_TXCFG, AR_TXCFG_ATIM_TXPOLICY);
bt.bt_flags |= AR_TIMER_MODE_NDP;
/* fall thru... */
case HAL_M_HOSTAP:
bt.bt_nextdba = (next_beacon -
ah->ah_config.ah_dma_beacon_response_time) << 3; /* 1/8 TU */
bt.bt_nextswba = (next_beacon -
ah->ah_config.ah_sw_beacon_response_time) << 3; /* 1/8 TU */
bt.bt_flags |= AR_TIMER_MODE_TBTT
| AR_TIMER_MODE_DBA
| AR_TIMER_MODE_SWBA;
break;
}
/*
* Set the ATIM window
* Our hardware does not support an ATIM window of 0
* (beacons will not work). If the ATIM windows is 0,
* force it to 1.
*/
bt.bt_nextatim = next_beacon + 1;
bt.bt_intval = beacon_period &
(AR_BEACON_PERIOD | AR_BEACON_RESET_TSF | AR_BEACON_EN);
ar5416SetBeaconTimers(ah, &bt);
}
#define AR_BEACON_PERIOD_MAX 0xffff
void
ar5416ResetStaBeaconTimers(struct ath_hal *ah)
{
uint32_t val;
OS_REG_WRITE(ah, AR_NEXT_TBTT, 0); /* no beacons */
val = OS_REG_READ(ah, AR_STA_ID1);
val |= AR_STA_ID1_PWR_SAV; /* XXX */
/* tell the h/w that the associated AP is not PCF capable */
OS_REG_WRITE(ah, AR_STA_ID1,
val & ~(AR_STA_ID1_USE_DEFANT | AR_STA_ID1_PCF));
OS_REG_WRITE(ah, AR5416_BEACON_PERIOD, AR_BEACON_PERIOD_MAX);
OS_REG_WRITE(ah, AR_DBA_PERIOD, AR_BEACON_PERIOD_MAX);
}
/*
* Set all the beacon related bits on the h/w for stations
* i.e. initializes the corresponding h/w timers;
* also tells the h/w whether to anticipate PCF beacons
*/
void
ar5416SetStaBeaconTimers(struct ath_hal *ah, const HAL_BEACON_STATE *bs)
{
uint32_t nextTbtt, nextdtim,beaconintval, dtimperiod;
HALASSERT(bs->bs_intval != 0);
/* NB: no cfp setting since h/w automatically takes care */
OS_REG_WRITE(ah, AR_NEXT_TBTT, TU_TO_USEC(bs->bs_nexttbtt));
/*
* Start the beacon timers by setting the BEACON register
* to the beacon interval; no need to write tim offset since
* h/w parses IEs.
*/
OS_REG_WRITE(ah, AR5416_BEACON_PERIOD,
TU_TO_USEC(bs->bs_intval & HAL_BEACON_PERIOD));
OS_REG_WRITE(ah, AR_DBA_PERIOD,
TU_TO_USEC(bs->bs_intval & HAL_BEACON_PERIOD));
/*
* Configure the BMISS interrupt. Note that we
* assume the caller blocks interrupts while enabling
* the threshold.
*/
HALASSERT(bs->bs_bmissthreshold <=
(AR_RSSI_THR_BM_THR >> AR_RSSI_THR_BM_THR_S));
OS_REG_RMW_FIELD(ah, AR_RSSI_THR,
AR_RSSI_THR_BM_THR, bs->bs_bmissthreshold);
/*
* Program the sleep registers to correlate with the beacon setup.
*/
/*
* Oahu beacons timers on the station were used for power
* save operation (waking up in anticipation of a beacon)
* and any CFP function; Venice does sleep/power-save timers
* differently - so this is the right place to set them up;
* don't think the beacon timers are used by venice sta hw
* for any useful purpose anymore
* Setup venice's sleep related timers
* Current implementation assumes sw processing of beacons -
* assuming an interrupt is generated every beacon which
* causes the hardware to become awake until the sw tells
* it to go to sleep again; beacon timeout is to allow for
* beacon jitter; cab timeout is max time to wait for cab
* after seeing the last DTIM or MORE CAB bit
*/
#define CAB_TIMEOUT_VAL 10 /* in TU */
#define BEACON_TIMEOUT_VAL 10 /* in TU */
#define SLEEP_SLOP 3 /* in TU */
/*
* For max powersave mode we may want to sleep for longer than a
* beacon period and not want to receive all beacons; modify the
* timers accordingly; make sure to align the next TIM to the
* next DTIM if we decide to wake for DTIMs only
*/
beaconintval = bs->bs_intval & HAL_BEACON_PERIOD;
HALASSERT(beaconintval != 0);
if (bs->bs_sleepduration > beaconintval) {
HALASSERT(roundup(bs->bs_sleepduration, beaconintval) ==
bs->bs_sleepduration);
beaconintval = bs->bs_sleepduration;
}
dtimperiod = bs->bs_dtimperiod;
if (bs->bs_sleepduration > dtimperiod) {
HALASSERT(dtimperiod == 0 ||
roundup(bs->bs_sleepduration, dtimperiod) ==
bs->bs_sleepduration);
dtimperiod = bs->bs_sleepduration;
}
HALASSERT(beaconintval <= dtimperiod);
if (beaconintval == dtimperiod)
nextTbtt = bs->bs_nextdtim;
else
nextTbtt = bs->bs_nexttbtt;
nextdtim = bs->bs_nextdtim;
OS_REG_WRITE(ah, AR_NEXT_DTIM,
TU_TO_USEC(bs->bs_nextdtim - SLEEP_SLOP));
OS_REG_WRITE(ah, AR_NEXT_TIM, TU_TO_USEC(nextTbtt - SLEEP_SLOP));
/* cab timeout is now in 1/8 TU */
OS_REG_WRITE(ah, AR5416_SLEEP1,
SM((CAB_TIMEOUT_VAL << 3), AR5416_SLEEP1_CAB_TIMEOUT)
| AR5416_SLEEP1_ASSUME_DTIM);
/* XXX autosleep? Use min beacon timeout; check ath9k -adrian */
/* beacon timeout is now in 1/8 TU */
OS_REG_WRITE(ah, AR5416_SLEEP2,
SM((BEACON_TIMEOUT_VAL << 3), AR5416_SLEEP2_BEACON_TIMEOUT));
/* TIM_PERIOD and DTIM_PERIOD are now in uS. */
OS_REG_WRITE(ah, AR_TIM_PERIOD, TU_TO_USEC(beaconintval));
OS_REG_WRITE(ah, AR_DTIM_PERIOD, TU_TO_USEC(dtimperiod));
OS_REG_SET_BIT(ah, AR_TIMER_MODE,
AR_TIMER_MODE_TBTT | AR_TIMER_MODE_TIM | AR_TIMER_MODE_DTIM);
HALDEBUG(ah, HAL_DEBUG_BEACON, "%s: next DTIM %d\n",
__func__, bs->bs_nextdtim);
HALDEBUG(ah, HAL_DEBUG_BEACON, "%s: next beacon %d\n",
__func__, nextTbtt);
HALDEBUG(ah, HAL_DEBUG_BEACON, "%s: beacon period %d\n",
__func__, beaconintval);
HALDEBUG(ah, HAL_DEBUG_BEACON, "%s: DTIM period %d\n",
__func__, dtimperiod);
#undef CAB_TIMEOUT_VAL
#undef BEACON_TIMEOUT_VAL
#undef SLEEP_SLOP
}
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