dbc9f36cf7
Now that the SPDX tag is in all vt6655 files, that identifies the license in a specific and legally-defined manner. So the extra GPL text wording can be removed as it is no longer needed at all. This is done on a quest to remove the 700+ different ways that files in the kernel describe the GPL license text. And there's unneeded stuff like the address (sometimes incorrect) for the FSF which is never needed. No copyright headers or other non-license-description text was removed. Cc: Forest Bond <forest@alittletooquiet.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
157 lines
3.5 KiB
C
157 lines
3.5 KiB
C
// 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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