// SPDX-License-Identifier: GPL-2.0+
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/*
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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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* 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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