339 lines
8.2 KiB
C
339 lines
8.2 KiB
C
/*
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* Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
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* All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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*
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* File: power.c
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*
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* Purpose: Handles 802.11 power management functions
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*
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* Author: Lyndon Chen
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*
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* Date: July 17, 2002
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*
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* Functions:
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* PSvEnablePowerSaving - Enable Power Saving Mode
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* PSvDiasblePowerSaving - Disable Power Saving Mode
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* PSbConsiderPowerDown - Decide if we can Power Down
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* PSvSendPSPOLL - Send PS-POLL packet
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* PSbSendNullPacket - Send Null packet
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* PSbIsNextTBTTWakeUp - Decide if we need to wake up at next Beacon
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*
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* Revision History:
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*
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*/
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#include "mac.h"
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#include "device.h"
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#include "wmgr.h"
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#include "power.h"
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#include "wcmd.h"
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#include "rxtx.h"
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#include "card.h"
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#include "usbpipe.h"
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static int msglevel = MSG_LEVEL_INFO;
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/*
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*
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* Routine Description:
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* Enable hw power saving functions
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*
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* Return Value:
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* None.
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*
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*/
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void PSvEnablePowerSaving(struct vnt_private *pDevice, u16 wListenInterval)
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{
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struct vnt_manager *pMgmt = &pDevice->vnt_mgmt;
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u16 wAID = pMgmt->wCurrAID | BIT14 | BIT15;
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/* set period of power up before TBTT */
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MACvWriteWord(pDevice, MAC_REG_PWBT, C_PWBT);
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if (pDevice->op_mode != NL80211_IFTYPE_ADHOC) {
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/* set AID */
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MACvWriteWord(pDevice, MAC_REG_AIDATIM, wAID);
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}
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/* Warren:06-18-2004,the sequence must follow
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* PSEN->AUTOSLEEP->GO2DOZE
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*/
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/* enable power saving hw function */
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MACvRegBitsOn(pDevice, MAC_REG_PSCTL, PSCTL_PSEN);
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/* Set AutoSleep */
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MACvRegBitsOn(pDevice, MAC_REG_PSCFG, PSCFG_AUTOSLEEP);
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/* Warren:MUST turn on this once before turn on AUTOSLEEP ,or the
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* AUTOSLEEP doesn't work
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*/
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MACvRegBitsOn(pDevice, MAC_REG_PSCTL, PSCTL_GO2DOZE);
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if (wListenInterval >= 2) {
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/* clear always listen beacon */
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MACvRegBitsOff(pDevice, MAC_REG_PSCTL, PSCTL_ALBCN);
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/* first time set listen next beacon */
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MACvRegBitsOn(pDevice, MAC_REG_PSCTL, PSCTL_LNBCN);
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pMgmt->wCountToWakeUp = wListenInterval;
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} else {
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/* always listen beacon */
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MACvRegBitsOn(pDevice, MAC_REG_PSCTL, PSCTL_ALBCN);
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pMgmt->wCountToWakeUp = 0;
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}
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pDevice->bEnablePSMode = true;
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/* We don't send null pkt in ad hoc mode
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* since beacon will handle this.
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*/
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if (pDevice->op_mode == NL80211_IFTYPE_STATION)
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PSbSendNullPacket(pDevice);
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pDevice->bPWBitOn = true;
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DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "PS:Power Saving Mode Enable...\n");
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}
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/*
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*
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* Routine Description:
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* Disable hw power saving functions
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*
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* Return Value:
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* None.
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*
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*/
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void PSvDisablePowerSaving(struct vnt_private *pDevice)
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{
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/* disable power saving hw function */
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vnt_control_out(pDevice, MESSAGE_TYPE_DISABLE_PS, 0,
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0, 0, NULL);
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/* clear AutoSleep */
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MACvRegBitsOff(pDevice, MAC_REG_PSCFG, PSCFG_AUTOSLEEP);
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/* set always listen beacon */
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MACvRegBitsOn(pDevice, MAC_REG_PSCTL, PSCTL_ALBCN);
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pDevice->bEnablePSMode = false;
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if (pDevice->op_mode == NL80211_IFTYPE_STATION)
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PSbSendNullPacket(pDevice);
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pDevice->bPWBitOn = false;
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}
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/*
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*
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* Routine Description:
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* Consider to power down when no more packets to tx or rx.
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*
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* Return Value:
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* true, if power down success
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* false, if fail
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*/
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int PSbConsiderPowerDown(struct vnt_private *pDevice, int bCheckRxDMA,
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int bCheckCountToWakeUp)
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{
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struct vnt_manager *pMgmt = &pDevice->vnt_mgmt;
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u8 byData;
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/* check if already in Doze mode */
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vnt_control_in_u8(pDevice, MESSAGE_REQUEST_MACREG,
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MAC_REG_PSCTL, &byData);
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if ((byData & PSCTL_PS) != 0)
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return true;
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if (pMgmt->eCurrMode != WMAC_MODE_IBSS_STA) {
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/* check if in TIM wake period */
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if (pMgmt->bInTIMWake)
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return false;
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}
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/* check scan state */
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if (pDevice->bCmdRunning)
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return false;
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/* Tx Burst */
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if (pDevice->bPSModeTxBurst)
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return false;
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/* Froce PSEN on */
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MACvRegBitsOn(pDevice, MAC_REG_PSCTL, PSCTL_PSEN);
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if (pMgmt->eCurrMode != WMAC_MODE_IBSS_STA) {
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if (bCheckCountToWakeUp && (pMgmt->wCountToWakeUp == 0
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|| pMgmt->wCountToWakeUp == 1)) {
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return false;
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}
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}
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pDevice->bPSRxBeacon = true;
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/* no Tx, no Rx isr, now go to Doze */
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MACvRegBitsOn(pDevice, MAC_REG_PSCTL, PSCTL_GO2DOZE);
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DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "Go to Doze ZZZZZZZZZZZZZZZ\n");
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return true;
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}
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/*
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*
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* Routine Description:
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* Send PS-POLL packet
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*
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* Return Value:
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* None.
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*
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*/
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void PSvSendPSPOLL(struct vnt_private *pDevice)
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{
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struct vnt_manager *pMgmt = &pDevice->vnt_mgmt;
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struct vnt_tx_mgmt *pTxPacket = NULL;
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memset(pMgmt->pbyPSPacketPool, 0, sizeof(struct vnt_tx_mgmt)
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+ WLAN_HDR_ADDR2_LEN);
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pTxPacket = (struct vnt_tx_mgmt *)pMgmt->pbyPSPacketPool;
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pTxPacket->p80211Header = (PUWLAN_80211HDR)((u8 *)pTxPacket
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+ sizeof(struct vnt_tx_mgmt));
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pTxPacket->p80211Header->sA2.wFrameCtl = cpu_to_le16(
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(
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WLAN_SET_FC_FTYPE(WLAN_TYPE_CTL) |
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WLAN_SET_FC_FSTYPE(WLAN_FSTYPE_PSPOLL) |
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WLAN_SET_FC_PWRMGT(0)
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));
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pTxPacket->p80211Header->sA2.wDurationID =
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pMgmt->wCurrAID | BIT14 | BIT15;
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memcpy(pTxPacket->p80211Header->sA2.abyAddr1, pMgmt->abyCurrBSSID,
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WLAN_ADDR_LEN);
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memcpy(pTxPacket->p80211Header->sA2.abyAddr2, pMgmt->abyMACAddr,
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WLAN_ADDR_LEN);
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pTxPacket->cbMPDULen = WLAN_HDR_ADDR2_LEN;
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pTxPacket->cbPayloadLen = 0;
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/* log failure if sending failed */
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if (csMgmt_xmit(pDevice, pTxPacket) != CMD_STATUS_PENDING)
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DBG_PRT(MSG_LEVEL_DEBUG,
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KERN_INFO "Send PS-Poll packet failed..\n");
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}
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/*
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*
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* Routine Description:
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* Send NULL packet to AP for notification power state of STA
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*
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* Return Value:
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* None.
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*
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*/
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int PSbSendNullPacket(struct vnt_private *pDevice)
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{
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struct vnt_tx_mgmt *pTxPacket = NULL;
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struct vnt_manager *pMgmt = &pDevice->vnt_mgmt;
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u16 flags = 0;
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if (pDevice->bLinkPass == false)
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return false;
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if (pDevice->bEnablePSMode == false && pDevice->tx_trigger == false)
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return false;
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memset(pMgmt->pbyPSPacketPool, 0, sizeof(struct vnt_tx_mgmt)
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+ WLAN_NULLDATA_FR_MAXLEN);
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pTxPacket = (struct vnt_tx_mgmt *)pMgmt->pbyPSPacketPool;
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pTxPacket->p80211Header = (PUWLAN_80211HDR)((u8 *)pTxPacket
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+ sizeof(struct vnt_tx_mgmt));
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flags = WLAN_SET_FC_FTYPE(WLAN_TYPE_DATA) |
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WLAN_SET_FC_FSTYPE(WLAN_FSTYPE_NULL);
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if (pDevice->bEnablePSMode)
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flags |= WLAN_SET_FC_PWRMGT(1);
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else
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flags |= WLAN_SET_FC_PWRMGT(0);
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pTxPacket->p80211Header->sA3.wFrameCtl = cpu_to_le16(flags);
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if (pMgmt->eCurrMode != WMAC_MODE_IBSS_STA)
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pTxPacket->p80211Header->sA3.wFrameCtl |=
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cpu_to_le16((u16)WLAN_SET_FC_TODS(1));
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memcpy(pTxPacket->p80211Header->sA3.abyAddr1, pMgmt->abyCurrBSSID,
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WLAN_ADDR_LEN);
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memcpy(pTxPacket->p80211Header->sA3.abyAddr2, pMgmt->abyMACAddr,
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WLAN_ADDR_LEN);
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memcpy(pTxPacket->p80211Header->sA3.abyAddr3, pMgmt->abyCurrBSSID,
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WLAN_BSSID_LEN);
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pTxPacket->cbMPDULen = WLAN_HDR_ADDR3_LEN;
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pTxPacket->cbPayloadLen = 0;
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/* log error if sending failed */
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if (csMgmt_xmit(pDevice, pTxPacket) != CMD_STATUS_PENDING) {
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DBG_PRT(MSG_LEVEL_DEBUG,
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KERN_INFO "Send Null Packet failed !\n");
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return false;
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}
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return true;
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}
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/*
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*
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* Routine Description:
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* Check if Next TBTT must wake up
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*
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* Return Value:
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* None.
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*
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*/
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int PSbIsNextTBTTWakeUp(struct vnt_private *pDevice)
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{
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struct vnt_manager *pMgmt = &pDevice->vnt_mgmt;
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int bWakeUp = false;
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if (pMgmt->wListenInterval >= 2) {
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if (pMgmt->wCountToWakeUp == 0)
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pMgmt->wCountToWakeUp = pMgmt->wListenInterval;
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pMgmt->wCountToWakeUp--;
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if (pMgmt->wCountToWakeUp == 1) {
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/* Turn on wake up to listen next beacon */
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MACvRegBitsOn(pDevice, MAC_REG_PSCTL, PSCTL_LNBCN);
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pDevice->bPSRxBeacon = false;
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bWakeUp = true;
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} else if (!pDevice->bPSRxBeacon) {
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/* Listen until RxBeacon */
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MACvRegBitsOn(pDevice, MAC_REG_PSCTL, PSCTL_LNBCN);
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}
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}
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return bWakeUp;
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}
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