Linux-2.6.33.2/drivers/staging/vt6656/power.c
/*
* 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 managment 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 "ttype.h"
#include "mac.h"
#include "device.h"
#include "wmgr.h"
#include "power.h"
#include "wcmd.h"
#include "rxtx.h"
#include "card.h"
#include "control.h"
#include "rndis.h"
/*--------------------- Static Definitions -------------------------*/
/*--------------------- Static Classes ----------------------------*/
/*--------------------- Static Variables --------------------------*/
static int msglevel =MSG_LEVEL_INFO;
/*--------------------- Static Functions --------------------------*/
/*--------------------- Export Variables --------------------------*/
/*--------------------- Export Functions --------------------------*/
/*+
*
* Routine Description:
* Enable hw power saving functions
*
* Return Value:
* None.
*
-*/
VOID
PSvEnablePowerSaving(
IN HANDLE hDeviceContext,
IN WORD wListenInterval
)
{
PSDevice pDevice = (PSDevice)hDeviceContext;
PSMgmtObject pMgmt = &(pDevice->sMgmtObj);
WORD wAID = pMgmt->wCurrAID | BIT14 | BIT15;
// set period of power up before TBTT
MACvWriteWord(pDevice, MAC_REG_PWBT, C_PWBT);
if (pDevice->eOPMode != OP_MODE_ADHOC) {
// set AID
MACvWriteWord(pDevice, MAC_REG_AIDATIM, wAID);
} else {
// set ATIM Window
//MACvWriteATIMW(pDevice->PortOffset, pMgmt->wCurrATIMWindow);
}
//Warren:06-18-2004,the sequence must follow PSEN->AUTOSLEEP->GO2DOZE
// enable power saving hw function
MACvRegBitsOn(pDevice, MAC_REG_PSCTL, PSCTL_PSEN);
// Set AutoSleep
MACvRegBitsOn(pDevice, MAC_REG_PSCFG, PSCFG_AUTOSLEEP);
//Warren:MUST turn on this once before turn on AUTOSLEEP ,or the AUTOSLEEP doesn't work
MACvRegBitsOn(pDevice, MAC_REG_PSCTL, PSCTL_GO2DOZE);
if (wListenInterval >= 2) {
// clear always listen beacon
MACvRegBitsOff(pDevice, MAC_REG_PSCTL, PSCTL_ALBCN);
// first time set listen next beacon
MACvRegBitsOn(pDevice, MAC_REG_PSCTL, PSCTL_LNBCN);
pMgmt->wCountToWakeUp = wListenInterval;
}
else {
// always listen beacon
MACvRegBitsOn(pDevice, MAC_REG_PSCTL, PSCTL_ALBCN);
pMgmt->wCountToWakeUp = 0;
}
pDevice->bEnablePSMode = TRUE;
if (pDevice->eOPMode == OP_MODE_ADHOC) {
// bMgrPrepareBeaconToSend((HANDLE)pDevice, pMgmt);
}
// We don't send null pkt in ad hoc mode since beacon will handle this.
else if (pDevice->eOPMode == OP_MODE_INFRASTRUCTURE) {
PSbSendNullPacket(pDevice);
}
pDevice->bPWBitOn = TRUE;
DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "PS:Power Saving Mode Enable... \n");
return;
}
/*+
*
* Routine Description:
* Disable hw power saving functions
*
* Return Value:
* None.
*
-*/
VOID
PSvDisablePowerSaving(
IN HANDLE hDeviceContext
)
{
PSDevice pDevice = (PSDevice)hDeviceContext;
// PSMgmtObject pMgmt = &(pDevice->sMgmtObj);
// disable power saving hw function
CONTROLnsRequestOut(pDevice,
MESSAGE_TYPE_DISABLE_PS,
0,
0,
0,
NULL
);
//clear AutoSleep
MACvRegBitsOff(pDevice, MAC_REG_PSCFG, PSCFG_AUTOSLEEP);
// set always listen beacon
MACvRegBitsOn(pDevice, MAC_REG_PSCTL, PSCTL_ALBCN);
pDevice->bEnablePSMode = FALSE;
if (pDevice->eOPMode == OP_MODE_INFRASTRUCTURE) {
PSbSendNullPacket(pDevice);
}
pDevice->bPWBitOn = FALSE;
return;
}
/*+
*
* Routine Description:
* Consider to power down when no more packets to tx or rx.
*
* Return Value:
* TRUE, if power down success
* FALSE, if fail
-*/
BOOL
PSbConsiderPowerDown(
IN HANDLE hDeviceContext,
IN BOOL bCheckRxDMA,
IN BOOL bCheckCountToWakeUp
)
{
PSDevice pDevice = (PSDevice)hDeviceContext;
PSMgmtObject pMgmt = &(pDevice->sMgmtObj);
BYTE byData;
// check if already in Doze mode
ControlvReadByte(pDevice, MESSAGE_REQUEST_MACREG, MAC_REG_PSCTL, &byData);
if ( (byData & PSCTL_PS) != 0 )
return TRUE;;
if (pMgmt->eCurrMode != WMAC_MODE_IBSS_STA) {
// check if in TIM wake period
if (pMgmt->bInTIMWake)
return FALSE;
}
// check scan state
if (pDevice->bCmdRunning)
return FALSE;
//Tx Burst
if ( pDevice->bPSModeTxBurst )
return FALSE;
// Froce PSEN on
MACvRegBitsOn(pDevice, MAC_REG_PSCTL, PSCTL_PSEN);
if (pMgmt->eCurrMode != WMAC_MODE_IBSS_STA) {
if (bCheckCountToWakeUp &&
(pMgmt->wCountToWakeUp == 0 || pMgmt->wCountToWakeUp == 1)) {
return FALSE;
}
}
pDevice->bPSRxBeacon = TRUE;
// no Tx, no Rx isr, now go to Doze
MACvRegBitsOn(pDevice, MAC_REG_PSCTL, PSCTL_GO2DOZE);
DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "Go to Doze ZZZZZZZZZZZZZZZ\n");
return TRUE;
}
/*+
*
* Routine Description:
* Send PS-POLL packet
*
* Return Value:
* None.
*
-*/
VOID
PSvSendPSPOLL(
IN HANDLE hDeviceContext
)
{
PSDevice pDevice = (PSDevice)hDeviceContext;
PSMgmtObject pMgmt = &(pDevice->sMgmtObj);
PSTxMgmtPacket pTxPacket = NULL;
memset(pMgmt->pbyPSPacketPool, 0, sizeof(STxMgmtPacket) + WLAN_HDR_ADDR2_LEN);
pTxPacket = (PSTxMgmtPacket)pMgmt->pbyPSPacketPool;
pTxPacket->p80211Header = (PUWLAN_80211HDR)((PBYTE)pTxPacket + sizeof(STxMgmtPacket));
pTxPacket->p80211Header->sA2.wFrameCtl = cpu_to_le16(
(
WLAN_SET_FC_FTYPE(WLAN_TYPE_CTL) |
WLAN_SET_FC_FSTYPE(WLAN_FSTYPE_PSPOLL) |
WLAN_SET_FC_PWRMGT(0)
));
pTxPacket->p80211Header->sA2.wDurationID = pMgmt->wCurrAID | BIT14 | BIT15;
memcpy(pTxPacket->p80211Header->sA2.abyAddr1, pMgmt->abyCurrBSSID, WLAN_ADDR_LEN);
memcpy(pTxPacket->p80211Header->sA2.abyAddr2, pMgmt->abyMACAddr, WLAN_ADDR_LEN);
pTxPacket->cbMPDULen = WLAN_HDR_ADDR2_LEN;
pTxPacket->cbPayloadLen = 0;
// send the frame
if (csMgmt_xmit(pDevice, pTxPacket) != CMD_STATUS_PENDING) {
DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "Send PS-Poll packet failed..\n");
}
else {
// DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "Send PS-Poll packet success..\n");
};
return;
}
/*+
*
* Routine Description:
* Send NULL packet to AP for notification power state of STA
*
* Return Value:
* None.
*
-*/
BOOL
PSbSendNullPacket(
IN HANDLE hDeviceContext
)
{
PSDevice pDevice = (PSDevice)hDeviceContext;
PSTxMgmtPacket pTxPacket = NULL;
PSMgmtObject pMgmt = &(pDevice->sMgmtObj);
if (pDevice->bLinkPass == FALSE) {
return FALSE;
}
//2007-0115-03<Add>by MikeLiu
#ifdef TxInSleep
if ((pDevice->bEnablePSMode == FALSE) &&
(pDevice->fTxDataInSleep == FALSE)){
return FALSE;
}
#else
if (pDevice->bEnablePSMode == FALSE) {
return FALSE;
}
#endif
memset(pMgmt->pbyPSPacketPool, 0, sizeof(STxMgmtPacket) + WLAN_NULLDATA_FR_MAXLEN);
pTxPacket = (PSTxMgmtPacket)pMgmt->pbyPSPacketPool;
pTxPacket->p80211Header = (PUWLAN_80211HDR)((PBYTE)pTxPacket + sizeof(STxMgmtPacket));
if (pDevice->bEnablePSMode) {
pTxPacket->p80211Header->sA3.wFrameCtl = cpu_to_le16(
(
WLAN_SET_FC_FTYPE(WLAN_TYPE_DATA) |
WLAN_SET_FC_FSTYPE(WLAN_FSTYPE_NULL) |
WLAN_SET_FC_PWRMGT(1)
));
}
else {
pTxPacket->p80211Header->sA3.wFrameCtl = cpu_to_le16(
(
WLAN_SET_FC_FTYPE(WLAN_TYPE_DATA) |
WLAN_SET_FC_FSTYPE(WLAN_FSTYPE_NULL) |
WLAN_SET_FC_PWRMGT(0)
));
}
if(pMgmt->eCurrMode != WMAC_MODE_IBSS_STA) {
pTxPacket->p80211Header->sA3.wFrameCtl |= cpu_to_le16((WORD)WLAN_SET_FC_TODS(1));
}
memcpy(pTxPacket->p80211Header->sA3.abyAddr1, pMgmt->abyCurrBSSID, WLAN_ADDR_LEN);
memcpy(pTxPacket->p80211Header->sA3.abyAddr2, pMgmt->abyMACAddr, WLAN_ADDR_LEN);
memcpy(pTxPacket->p80211Header->sA3.abyAddr3, pMgmt->abyCurrBSSID, WLAN_BSSID_LEN);
pTxPacket->cbMPDULen = WLAN_HDR_ADDR3_LEN;
pTxPacket->cbPayloadLen = 0;
// send the frame
if (csMgmt_xmit(pDevice, pTxPacket) != CMD_STATUS_PENDING) {
DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "Send Null Packet failed !\n");
return FALSE;
}
else {
// DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "Send Null Packet success....\n");
}
return TRUE ;
}
/*+
*
* Routine Description:
* Check if Next TBTT must wake up
*
* Return Value:
* None.
*
-*/
BOOL
PSbIsNextTBTTWakeUp(
IN HANDLE hDeviceContext
)
{
PSDevice pDevice = (PSDevice)hDeviceContext;
PSMgmtObject pMgmt = &(pDevice->sMgmtObj);
BOOL bWakeUp = FALSE;
if (pMgmt->wListenInterval >= 2) {
if (pMgmt->wCountToWakeUp == 0) {
pMgmt->wCountToWakeUp = pMgmt->wListenInterval;
}
pMgmt->wCountToWakeUp --;
if (pMgmt->wCountToWakeUp == 1) {
// Turn on wake up to listen next beacon
MACvRegBitsOn(pDevice, MAC_REG_PSCTL, PSCTL_LNBCN);
pDevice->bPSRxBeacon = FALSE;
bWakeUp = TRUE;
} else if ( !pDevice->bPSRxBeacon ) {
//Listen until RxBeacon
MACvRegBitsOn(pDevice, MAC_REG_PSCTL, PSCTL_LNBCN);
}
}
return bWakeUp;
}