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/*
* Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
*
* File: power.c
*
* Purpose: Handles 802.11 power management functions
*
* Author: Lyndon Chen
*
* Date: July 17, 2002
*
* Functions:
* PSvEnablePowerSaving - Enable Power Saving Mode
* PSvDiasblePowerSaving - Disable Power Saving Mode
* PSbConsiderPowerDown - Decide if we can Power Down
* PSvSendPSPOLL - Send PS-POLL packet
* PSbSendNullPacket - Send Null packet
* PSbIsNextTBTTWakeUp - Decide if we need to wake up at next Beacon
*
* Revision History:
*
*/
#include "mac.h"
#include "device.h"
#include "power.h"
#include "card.h"
/*--------------------- Static Definitions -------------------------*/
/*--------------------- Static Classes ----------------------------*/
/*--------------------- Static Functions --------------------------*/
/*--------------------- Export Variables --------------------------*/
/*--------------------- Export Functions --------------------------*/
/*+
*
* Routine Description:
* Enable hw power saving functions
*
* Return Value:
* None.
*
-*/
void
PSvEnablePowerSaving(
struct vnt_private *priv,
unsigned short wListenInterval
)
{
u16 wAID = priv->current_aid | BIT(14) | BIT(15);
/* set period of power up before TBTT */
VNSvOutPortW(priv->PortOffset + MAC_REG_PWBT, C_PWBT);
if (priv->op_mode != NL80211_IFTYPE_ADHOC) {
/* set AID */
VNSvOutPortW(priv->PortOffset + MAC_REG_AIDATIM, wAID);
} else {
/* set ATIM Window */
#if 0 /* TODO atim window */
MACvWriteATIMW(priv->PortOffset, pMgmt->wCurrATIMWindow);
#endif
}
/* Set AutoSleep */
MACvRegBitsOn(priv->PortOffset, MAC_REG_PSCFG, PSCFG_AUTOSLEEP);
/* Set HWUTSF */
MACvRegBitsOn(priv->PortOffset, MAC_REG_TFTCTL, TFTCTL_HWUTSF);
if (wListenInterval >= 2) {
/* clear always listen beacon */
MACvRegBitsOff(priv->PortOffset, MAC_REG_PSCTL, PSCTL_ALBCN);
/* first time set listen next beacon */
MACvRegBitsOn(priv->PortOffset, MAC_REG_PSCTL, PSCTL_LNBCN);
} else {
/* always listen beacon */
MACvRegBitsOn(priv->PortOffset, MAC_REG_PSCTL, PSCTL_ALBCN);
}
/* enable power saving hw function */
MACvRegBitsOn(priv->PortOffset, MAC_REG_PSCTL, PSCTL_PSEN);
priv->bEnablePSMode = true;
priv->bPWBitOn = true;
pr_debug("PS:Power Saving Mode Enable...\n");
}
/*+
*
* Routine Description:
* Disable hw power saving functions
*
* Return Value:
* None.
*
-*/
void
PSvDisablePowerSaving(
struct vnt_private *priv
)
{
/* disable power saving hw function */
MACbPSWakeup(priv);
/* clear AutoSleep */
MACvRegBitsOff(priv->PortOffset, MAC_REG_PSCFG, PSCFG_AUTOSLEEP);
/* clear HWUTSF */
MACvRegBitsOff(priv->PortOffset, MAC_REG_TFTCTL, TFTCTL_HWUTSF);
/* set always listen beacon */
MACvRegBitsOn(priv->PortOffset, MAC_REG_PSCTL, PSCTL_ALBCN);
priv->bEnablePSMode = false;
priv->bPWBitOn = false;
}
/*+
*
* Routine Description:
* Check if Next TBTT must wake up
*
* Return Value:
* None.
*
-*/
bool
PSbIsNextTBTTWakeUp(
struct vnt_private *priv
)
{
struct ieee80211_hw *hw = priv->hw;
struct ieee80211_conf *conf = &hw->conf;
bool wake_up = false;
if (conf->listen_interval > 1) {
if (!priv->wake_up_count)
priv->wake_up_count = conf->listen_interval;
--priv->wake_up_count;
if (priv->wake_up_count == 1) {
/* Turn on wake up to listen next beacon */
MACvRegBitsOn(priv->PortOffset,
MAC_REG_PSCTL, PSCTL_LNBCN);
wake_up = true;
}
}
return wake_up;
}
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