drivers/staging/vt6655/power.c

   1 /*
   2  * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
   3  * All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  *
  20  * File: power.c
  21  *
  22  * Purpose: Handles 802.11 power management  functions
  23  *
  24  * Author: Lyndon Chen
  25  *
  26  * Date: July 17, 2002
  27  *
  28  * Functions:
  29  *      PSvEnablePowerSaving - Enable Power Saving Mode
  30  *      PSvDiasblePowerSaving - Disable Power Saving Mode
  31  *      PSbConsiderPowerDown - Decide if we can Power Down
  32  *      PSvSendPSPOLL - Send PS-POLL packet
  33  *      PSbSendNullPacket - Send Null packet
  34  *      PSbIsNextTBTTWakeUp - Decide if we need to wake up at next Beacon
  35  *
  36  * Revision History:
  37  *
  38  */
  39
  40 #include "ttype.h"
  41 #include "mac.h"
  42 #include "device.h"
  43 #include "wmgr.h"
  44 #include "power.h"
  45 #include "wcmd.h"
  46 #include "rxtx.h"
  47 #include "card.h"
  48
  49 /*---------------------  Static Definitions -------------------------*/
  50
  51
  52
  53
  54 /*---------------------  Static Classes  ----------------------------*/
  55
  56 /*---------------------  Static Variables  --------------------------*/
  57 static int          msglevel                =MSG_LEVEL_INFO;
  58 /*---------------------  Static Functions  --------------------------*/
  59
  60
  61 /*---------------------  Export Variables  --------------------------*/
  62
  63
  64 /*---------------------  Export Functions  --------------------------*/
  65
  66 /*+
  67  *
  68  * Routine Description:
  69  * Enable hw power saving functions
  70  *
  71  * Return Value:
  72  *    None.
  73  *
  74 -*/
  75
  76
  77 void
  78 PSvEnablePowerSaving(
  79     void *hDeviceContext,
  80     unsigned short wListenInterval
  81     )
  82 {
  83     PSDevice        pDevice = (PSDevice)hDeviceContext;
  84     PSMgmtObject    pMgmt = pDevice->pMgmt;
  85     unsigned short wAID = pMgmt->wCurrAID | BIT14 | BIT15;
  86
  87     // set period of power up before TBTT
  88     VNSvOutPortW(pDevice->PortOffset + MAC_REG_PWBT, C_PWBT);
  89     if (pDevice->eOPMode != OP_MODE_ADHOC) {
  90         // set AID
  91         VNSvOutPortW(pDevice->PortOffset + MAC_REG_AIDATIM, wAID);
  92     } else {
  93         // set ATIM Window
  94         MACvWriteATIMW(pDevice->PortOffset, pMgmt->wCurrATIMWindow);
  95     }
  96     // Set AutoSleep
  97     MACvRegBitsOn(pDevice->PortOffset, MAC_REG_PSCFG, PSCFG_AUTOSLEEP);
  98     // Set HWUTSF
  99     MACvRegBitsOn(pDevice->PortOffset, MAC_REG_TFTCTL, TFTCTL_HWUTSF);
 100
 101     if (wListenInterval >= 2) {
 102         // clear always listen beacon
 103         MACvRegBitsOff(pDevice->PortOffset, MAC_REG_PSCTL, PSCTL_ALBCN);
 104         //pDevice->wCFG &= ~CFG_ALB;
 105         // first time set listen next beacon
 106         MACvRegBitsOn(pDevice->PortOffset, MAC_REG_PSCTL, PSCTL_LNBCN);
 107         pMgmt->wCountToWakeUp = wListenInterval;
 108     }
 109     else {
 110         // always listen beacon
 111         MACvRegBitsOn(pDevice->PortOffset, MAC_REG_PSCTL, PSCTL_ALBCN);
 112         //pDevice->wCFG |= CFG_ALB;
 113         pMgmt->wCountToWakeUp = 0;
 114     }
 115
 116     // enable power saving hw function
 117     MACvRegBitsOn(pDevice->PortOffset, MAC_REG_PSCTL, PSCTL_PSEN);
 118     pDevice->bEnablePSMode = true;
 119
 120     if (pDevice->eOPMode == OP_MODE_ADHOC) {
 121 //        bMgrPrepareBeaconToSend((void *)pDevice, pMgmt);
 122     }
 123     // We don't send null pkt in ad hoc mode since beacon will handle this.
 124     else if (pDevice->eOPMode == OP_MODE_INFRASTRUCTURE) {
 125         PSbSendNullPacket(pDevice);
 126     }
 127     pDevice->bPWBitOn = true;
 128     DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "PS:Power Saving Mode Enable... \n");
 129     return;
 130 }
 131
 132
 133
 134
 135
 136
 137 /*+
 138  *
 139  * Routine Description:
 140  * Disable hw power saving functions
 141  *
 142  * Return Value:
 143  *    None.
 144  *
 145 -*/
 146
 147 void
 148 PSvDisablePowerSaving(
 149     void *hDeviceContext
 150     )
 151 {
 152     PSDevice        pDevice = (PSDevice)hDeviceContext;
 153 //    PSMgmtObject    pMgmt = pDevice->pMgmt;
 154
 155     // disable power saving hw function
 156     MACbPSWakeup(pDevice->PortOffset);
 157     //clear AutoSleep
 158     MACvRegBitsOff(pDevice->PortOffset, MAC_REG_PSCFG, PSCFG_AUTOSLEEP);
 159     //clear HWUTSF
 160     MACvRegBitsOff(pDevice->PortOffset, MAC_REG_TFTCTL, TFTCTL_HWUTSF);
 161     // set always listen beacon
 162     MACvRegBitsOn(pDevice->PortOffset, MAC_REG_PSCTL, PSCTL_ALBCN);
 163
 164     pDevice->bEnablePSMode = false;
 165
 166     if (pDevice->eOPMode == OP_MODE_INFRASTRUCTURE) {
 167         PSbSendNullPacket(pDevice);
 168     }
 169     pDevice->bPWBitOn = false;
 170     return;
 171 }
 172
 173
 174 /*+
 175  *
 176  * Routine Description:
 177  * Consider to power down when no more packets to tx or rx.
 178  *
 179  * Return Value:
 180  *    true, if power down success
 181  *    false, if fail
 182 -*/
 183
 184
 185 bool
 186 PSbConsiderPowerDown(
 187     void *hDeviceContext,
 188     bool bCheckRxDMA,
 189     bool bCheckCountToWakeUp
 190     )
 191 {
 192     PSDevice        pDevice = (PSDevice)hDeviceContext;
 193     PSMgmtObject    pMgmt = pDevice->pMgmt;
 194     unsigned int uIdx;
 195
 196     // check if already in Doze mode
 197     if (MACbIsRegBitsOn(pDevice->PortOffset, MAC_REG_PSCTL, PSCTL_PS))
 198         return true;
 199
 200     if (pMgmt->eCurrMode != WMAC_MODE_IBSS_STA) {
 201         // check if in TIM wake period
 202         if (pMgmt->bInTIMWake)
 203             return false;
 204     }
 205
 206     // check scan state
 207     if (pDevice->bCmdRunning)
 208         return false;
 209
 210     // Froce PSEN on
 211     MACvRegBitsOn(pDevice->PortOffset, MAC_REG_PSCTL, PSCTL_PSEN);
 212
 213     // check if all TD are empty,
 214     for (uIdx = 0; uIdx < TYPE_MAXTD; uIdx ++) {
 215         if (pDevice->iTDUsed[uIdx] != 0)
 216             return false;
 217     }
 218
 219     // check if rx isr is clear
 220     if (bCheckRxDMA &&
 221         ((pDevice->dwIsr& ISR_RXDMA0) != 0) &&
 222         ((pDevice->dwIsr & ISR_RXDMA1) != 0)){
 223         return false;
 224     }
 225
 226     if (pMgmt->eCurrMode != WMAC_MODE_IBSS_STA) {
 227         if (bCheckCountToWakeUp &&
 228            (pMgmt->wCountToWakeUp == 0 || pMgmt->wCountToWakeUp == 1)) {
 229              return false;
 230         }
 231     }
 232
 233     // no Tx, no Rx isr, now go to Doze
 234     MACvRegBitsOn(pDevice->PortOffset, MAC_REG_PSCTL, PSCTL_GO2DOZE);
 235     DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "Go to Doze ZZZZZZZZZZZZZZZ\n");
 236     return true;
 237 }
 238
 239
 240
 241 /*+
 242  *
 243  * Routine Description:
 244  * Send PS-POLL packet
 245  *
 246  * Return Value:
 247  *    None.
 248  *
 249 -*/
 250
 251
 252
 253 void
 254 PSvSendPSPOLL(
 255     void *hDeviceContext
 256     )
 257 {
 258     PSDevice            pDevice = (PSDevice)hDeviceContext;
 259     PSMgmtObject        pMgmt = pDevice->pMgmt;
 260     PSTxMgmtPacket      pTxPacket = NULL;
 261
 262
 263     memset(pMgmt->pbyPSPacketPool, 0, sizeof(STxMgmtPacket) + WLAN_HDR_ADDR2_LEN);
 264     pTxPacket = (PSTxMgmtPacket)pMgmt->pbyPSPacketPool;
 265     pTxPacket->p80211Header = (PUWLAN_80211HDR)((unsigned char *)pTxPacket + sizeof(STxMgmtPacket));
 266     pTxPacket->p80211Header->sA2.wFrameCtl = cpu_to_le16(
 267          (
 268          WLAN_SET_FC_FTYPE(WLAN_TYPE_CTL) |
 269          WLAN_SET_FC_FSTYPE(WLAN_FSTYPE_PSPOLL) |
 270          WLAN_SET_FC_PWRMGT(0)
 271          ));
 272     pTxPacket->p80211Header->sA2.wDurationID = pMgmt->wCurrAID | BIT14 | BIT15;
 273     memcpy(pTxPacket->p80211Header->sA2.abyAddr1, pMgmt->abyCurrBSSID, WLAN_ADDR_LEN);
 274     memcpy(pTxPacket->p80211Header->sA2.abyAddr2, pMgmt->abyMACAddr, WLAN_ADDR_LEN);
 275     pTxPacket->cbMPDULen = WLAN_HDR_ADDR2_LEN;
 276     pTxPacket->cbPayloadLen = 0;
 277     // send the frame
 278     if (csMgmt_xmit(pDevice, pTxPacket) != CMD_STATUS_PENDING) {
 279         DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "Send PS-Poll packet failed..\n");
 280     }
 281     else {
 282 //        DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "Send PS-Poll packet success..\n");
 283     };
 284
 285     return;
 286 }
 287
 288
 289
 290 /*+
 291  *
 292  * Routine Description:
 293  * Send NULL packet to AP for notification power state of STA
 294  *
 295  * Return Value:
 296  *    None.
 297  *
 298 -*/
 299 bool
 300 PSbSendNullPacket(
 301     void *hDeviceContext
 302     )
 303 {
 304     PSDevice            pDevice = (PSDevice)hDeviceContext;
 305     PSTxMgmtPacket      pTxPacket = NULL;
 306     PSMgmtObject        pMgmt = pDevice->pMgmt;
 307     unsigned int uIdx;
 308
 309
 310     if (pDevice->bLinkPass == false) {
 311         return false;
 312     }
 313     #ifdef TxInSleep
 314      if ((pDevice->bEnablePSMode == false) &&
 315           (pDevice->fTxDataInSleep == false)){
 316         return false;
 317     }
 318 #else
 319     if (pDevice->bEnablePSMode == false) {
 320         return false;
 321     }
 322 #endif
 323     if (pDevice->bEnablePSMode) {
 324         for (uIdx = 0; uIdx < TYPE_MAXTD; uIdx ++) {
 325             if (pDevice->iTDUsed[uIdx] != 0)
 326                 return false;
 327         }
 328     }
 329
 330     memset(pMgmt->pbyPSPacketPool, 0, sizeof(STxMgmtPacket) + WLAN_NULLDATA_FR_MAXLEN);
 331     pTxPacket = (PSTxMgmtPacket)pMgmt->pbyPSPacketPool;
 332     pTxPacket->p80211Header = (PUWLAN_80211HDR)((unsigned char *)pTxPacket + sizeof(STxMgmtPacket));
 333
 334     if (pDevice->bEnablePSMode) {
 335
 336         pTxPacket->p80211Header->sA3.wFrameCtl = cpu_to_le16(
 337              (
 338             WLAN_SET_FC_FTYPE(WLAN_TYPE_DATA) |
 339             WLAN_SET_FC_FSTYPE(WLAN_FSTYPE_NULL) |
 340             WLAN_SET_FC_PWRMGT(1)
 341             ));
 342     }
 343     else {
 344         pTxPacket->p80211Header->sA3.wFrameCtl = cpu_to_le16(
 345              (
 346             WLAN_SET_FC_FTYPE(WLAN_TYPE_DATA) |
 347             WLAN_SET_FC_FSTYPE(WLAN_FSTYPE_NULL) |
 348             WLAN_SET_FC_PWRMGT(0)
 349             ));
 350     }
 351
 352     if(pMgmt->eCurrMode != WMAC_MODE_IBSS_STA) {
 353         pTxPacket->p80211Header->sA3.wFrameCtl |= cpu_to_le16((unsigned short)WLAN_SET_FC_TODS(1));
 354     }
 355
 356     memcpy(pTxPacket->p80211Header->sA3.abyAddr1, pMgmt->abyCurrBSSID, WLAN_ADDR_LEN);
 357     memcpy(pTxPacket->p80211Header->sA3.abyAddr2, pMgmt->abyMACAddr, WLAN_ADDR_LEN);
 358     memcpy(pTxPacket->p80211Header->sA3.abyAddr3, pMgmt->abyCurrBSSID, WLAN_BSSID_LEN);
 359     pTxPacket->cbMPDULen = WLAN_HDR_ADDR3_LEN;
 360     pTxPacket->cbPayloadLen = 0;
 361     // send the frame
 362     if (csMgmt_xmit(pDevice, pTxPacket) != CMD_STATUS_PENDING) {
 363         DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "Send Null Packet failed !\n");
 364         return false;
 365     }
 366     else {
 367
 368 //            DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "Send Null Packet success....\n");
 369     }
 370
 371
 372     return true ;
 373 }
 374
 375 /*+
 376  *
 377  * Routine Description:
 378  * Check if Next TBTT must wake up
 379  *
 380  * Return Value:
 381  *    None.
 382  *
 383 -*/
 384
 385 bool
 386 PSbIsNextTBTTWakeUp(
 387     void *hDeviceContext
 388     )
 389 {
 390
 391     PSDevice         pDevice = (PSDevice)hDeviceContext;
 392     PSMgmtObject        pMgmt = pDevice->pMgmt;
 393     bool bWakeUp = false;
 394
 395     if (pMgmt->wListenInterval >= 2) {
 396         if (pMgmt->wCountToWakeUp == 0) {
 397             pMgmt->wCountToWakeUp = pMgmt->wListenInterval;
 398         }
 399
 400         pMgmt->wCountToWakeUp --;
 401
 402         if (pMgmt->wCountToWakeUp == 1) {
 403             // Turn on wake up to listen next beacon
 404             MACvRegBitsOn(pDevice->PortOffset, MAC_REG_PSCTL, PSCTL_LNBCN);
 405             bWakeUp = true;
 406         }
 407
 408     }
 409
 410     return bWakeUp;
 411 }
 412