1 /* 2 * Copyright (c) 2002-2008 Sam Leffler, Errno Consulting 3 * Copyright (c) 2002-2006 Atheros Communications, Inc. 4 * 5 * Permission to use, copy, modify, and/or distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16 * 17 * $Id: ar5211_beacon.c,v 1.2 2009/01/06 06:03:57 mrg Exp $ 18 */ 19 #include "opt_ah.h" 20 21 #include "ah.h" 22 #include "ah_internal.h" 23 24 #include "ar5211/ar5211.h" 25 #include "ar5211/ar5211reg.h" 26 #include "ar5211/ar5211desc.h" 27 28 /* 29 * Routines used to initialize and generated beacons for the AR5211/AR5311. 30 */ 31 32 /* 33 * Initialize all of the hardware registers used to send beacons. 34 */ 35 void 36 ar5211SetBeaconTimers(struct ath_hal *ah, const HAL_BEACON_TIMERS *bt) 37 { 38 39 OS_REG_WRITE(ah, AR_TIMER0, bt->bt_nexttbtt); 40 OS_REG_WRITE(ah, AR_TIMER1, bt->bt_nextdba); 41 OS_REG_WRITE(ah, AR_TIMER2, bt->bt_nextswba); 42 OS_REG_WRITE(ah, AR_TIMER3, bt->bt_nextatim); 43 /* 44 * Set the Beacon register after setting all timers. 45 */ 46 OS_REG_WRITE(ah, AR_BEACON, bt->bt_intval); 47 } 48 49 /* 50 * Legacy api to initialize all of the beacon registers. 51 */ 52 void 53 ar5211BeaconInit(struct ath_hal *ah, 54 uint32_t next_beacon, uint32_t beacon_period) 55 { 56 HAL_BEACON_TIMERS bt; 57 58 bt.bt_nextdba = 0; 59 bt.bt_nextswba = 0; 60 bt.bt_nexttbtt = next_beacon; 61 /* 62 * TIMER1: in AP/adhoc mode this controls the DMA beacon 63 * alert timer; otherwise it controls the next wakeup time. 64 * TIMER2: in AP mode, it controls the SBA beacon alert 65 * interrupt; otherwise it sets the start of the next CFP. 66 */ 67 switch (AH_PRIVATE(ah)->ah_opmode) { 68 case HAL_M_STA: 69 case HAL_M_MONITOR: 70 bt.bt_nextdba = 0xffff; 71 bt.bt_nextswba = 0x7ffff; 72 break; 73 case HAL_M_IBSS: 74 case HAL_M_HOSTAP: 75 bt.bt_nextdba = (next_beacon - 76 ath_hal_dma_beacon_response_time) << 3; /* 1/8 TU */ 77 bt.bt_nextswba = (next_beacon - 78 ath_hal_sw_beacon_response_time) << 3; /* 1/8 TU */ 79 break; 80 } 81 /* 82 * Set the ATIM window 83 * Our hardware does not support an ATIM window of 0 84 * (beacons will not work). If the ATIM windows is 0, 85 * force it to 1. 86 */ 87 bt.bt_nextatim = next_beacon + 1; 88 bt.bt_intval = beacon_period & 89 (AR_BEACON_PERIOD | AR_BEACON_RESET_TSF | AR_BEACON_EN); 90 ar5211SetBeaconTimers(ah, &bt); 91 } 92 93 void 94 ar5211ResetStaBeaconTimers(struct ath_hal *ah) 95 { 96 uint32_t val; 97 98 OS_REG_WRITE(ah, AR_TIMER0, 0); /* no beacons */ 99 val = OS_REG_READ(ah, AR_STA_ID1); 100 val |= AR_STA_ID1_PWR_SAV; /* XXX */ 101 /* tell the h/w that the associated AP is not PCF capable */ 102 OS_REG_WRITE(ah, AR_STA_ID1, 103 val & ~(AR_STA_ID1_DEFAULT_ANTENNA | AR_STA_ID1_PCF)); 104 OS_REG_WRITE(ah, AR_BEACON, AR_BEACON_PERIOD); 105 } 106 107 /* 108 * Set all the beacon related bits on the h/w for stations 109 * i.e. initializes the corresponding h/w timers; 110 * also tells the h/w whether to anticipate PCF beacons 111 */ 112 void 113 ar5211SetStaBeaconTimers(struct ath_hal *ah, const HAL_BEACON_STATE *bs) 114 { 115 struct ath_hal_5211 *ahp = AH5211(ah); 116 117 HALDEBUG(ah, HAL_DEBUG_BEACON, "%s: setting beacon timers\n", __func__); 118 119 HALASSERT(bs->bs_intval != 0); 120 /* if the AP will do PCF */ 121 if (bs->bs_cfpmaxduration != 0) { 122 /* tell the h/w that the associated AP is PCF capable */ 123 OS_REG_WRITE(ah, AR_STA_ID1, 124 OS_REG_READ(ah, AR_STA_ID1) | AR_STA_ID1_PCF); 125 126 /* set CFP_PERIOD(1.024ms) register */ 127 OS_REG_WRITE(ah, AR_CFP_PERIOD, bs->bs_cfpperiod); 128 129 /* set CFP_DUR(1.024ms) register to max cfp duration */ 130 OS_REG_WRITE(ah, AR_CFP_DUR, bs->bs_cfpmaxduration); 131 132 /* set TIMER2(128us) to anticipated time of next CFP */ 133 OS_REG_WRITE(ah, AR_TIMER2, bs->bs_cfpnext << 3); 134 } else { 135 /* tell the h/w that the associated AP is not PCF capable */ 136 OS_REG_WRITE(ah, AR_STA_ID1, 137 OS_REG_READ(ah, AR_STA_ID1) &~ AR_STA_ID1_PCF); 138 } 139 140 /* 141 * Set TIMER0(1.024ms) to the anticipated time of the next beacon. 142 */ 143 OS_REG_WRITE(ah, AR_TIMER0, bs->bs_nexttbtt); 144 145 /* 146 * Start the beacon timers by setting the BEACON register 147 * to the beacon interval; also write the tim offset which 148 * we should know by now. The code, in ar5211WriteAssocid, 149 * also sets the tim offset once the AID is known which can 150 * be left as such for now. 151 */ 152 OS_REG_WRITE(ah, AR_BEACON, 153 (OS_REG_READ(ah, AR_BEACON) &~ (AR_BEACON_PERIOD|AR_BEACON_TIM)) 154 | SM(bs->bs_intval, AR_BEACON_PERIOD) 155 | SM(bs->bs_timoffset ? bs->bs_timoffset + 4 : 0, AR_BEACON_TIM) 156 ); 157 158 /* 159 * Configure the BMISS interrupt. Note that we 160 * assume the caller blocks interrupts while enabling 161 * the threshold. 162 */ 163 HALASSERT(bs->bs_bmissthreshold <= MS(0xffffffff, AR_RSSI_THR_BM_THR)); 164 ahp->ah_rssiThr = (ahp->ah_rssiThr &~ AR_RSSI_THR_BM_THR) 165 | SM(bs->bs_bmissthreshold, AR_RSSI_THR_BM_THR); 166 OS_REG_WRITE(ah, AR_RSSI_THR, ahp->ah_rssiThr); 167 168 /* 169 * Set the sleep duration in 1/8 TU's. 170 */ 171 #define SLEEP_SLOP 3 172 OS_REG_RMW_FIELD(ah, AR_SCR, AR_SCR_SLDUR, 173 (bs->bs_sleepduration - SLEEP_SLOP) << 3); 174 #undef SLEEP_SLOP 175 } 176
Indexes created Tue Sep 23 07:09:52 GMT 2025