21971f3e0e
This patch fixes the checkpatch issue by removing the Free Software Foundation's mailing address from the sample GPL notice. Because the FSF has changed address in the past, and may change again. Linux already includes a copy of the GPL. Signed-off-by: Varsha Rao <rvarsha016@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
166 lines
3.9 KiB
C
166 lines
3.9 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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* 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 "power.h"
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#include "card.h"
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/*--------------------- Static Definitions -------------------------*/
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/*--------------------- Static Classes ----------------------------*/
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/*--------------------- Static Functions --------------------------*/
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/*--------------------- Export Variables --------------------------*/
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/*--------------------- Export Functions --------------------------*/
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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
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PSvEnablePowerSaving(
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struct vnt_private *priv,
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unsigned short wListenInterval
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)
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{
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u16 wAID = priv->current_aid | BIT(14) | BIT(15);
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/* set period of power up before TBTT */
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VNSvOutPortW(priv->PortOffset + MAC_REG_PWBT, C_PWBT);
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if (priv->op_mode != NL80211_IFTYPE_ADHOC) {
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/* set AID */
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VNSvOutPortW(priv->PortOffset + MAC_REG_AIDATIM, wAID);
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} else {
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/* set ATIM Window */
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#if 0 /* TODO atim window */
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MACvWriteATIMW(priv->PortOffset, pMgmt->wCurrATIMWindow);
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#endif
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}
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/* Set AutoSleep */
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MACvRegBitsOn(priv->PortOffset, MAC_REG_PSCFG, PSCFG_AUTOSLEEP);
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/* Set HWUTSF */
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MACvRegBitsOn(priv->PortOffset, MAC_REG_TFTCTL, TFTCTL_HWUTSF);
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if (wListenInterval >= 2) {
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/* clear always listen beacon */
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MACvRegBitsOff(priv->PortOffset, MAC_REG_PSCTL, PSCTL_ALBCN);
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/* first time set listen next beacon */
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MACvRegBitsOn(priv->PortOffset, MAC_REG_PSCTL, PSCTL_LNBCN);
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} else {
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/* always listen beacon */
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MACvRegBitsOn(priv->PortOffset, MAC_REG_PSCTL, PSCTL_ALBCN);
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}
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/* enable power saving hw function */
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MACvRegBitsOn(priv->PortOffset, MAC_REG_PSCTL, PSCTL_PSEN);
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priv->bEnablePSMode = true;
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priv->bPWBitOn = true;
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pr_debug("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
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PSvDisablePowerSaving(
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struct vnt_private *priv
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)
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{
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/* disable power saving hw function */
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MACbPSWakeup(priv);
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/* clear AutoSleep */
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MACvRegBitsOff(priv->PortOffset, MAC_REG_PSCFG, PSCFG_AUTOSLEEP);
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/* clear HWUTSF */
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MACvRegBitsOff(priv->PortOffset, MAC_REG_TFTCTL, TFTCTL_HWUTSF);
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/* set always listen beacon */
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MACvRegBitsOn(priv->PortOffset, MAC_REG_PSCTL, PSCTL_ALBCN);
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priv->bEnablePSMode = false;
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priv->bPWBitOn = false;
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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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bool
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PSbIsNextTBTTWakeUp(
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struct vnt_private *priv
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)
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{
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struct ieee80211_hw *hw = priv->hw;
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struct ieee80211_conf *conf = &hw->conf;
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bool wake_up = false;
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if (conf->listen_interval > 1) {
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if (!priv->wake_up_count)
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priv->wake_up_count = conf->listen_interval;
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--priv->wake_up_count;
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if (priv->wake_up_count == 1) {
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/* Turn on wake up to listen next beacon */
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MACvRegBitsOn(priv->PortOffset,
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MAC_REG_PSCTL, PSCTL_LNBCN);
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wake_up = true;
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}
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}
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return wake_up;
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}
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