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 /*---------------------  Static Classes  ----------------------------*/
  52
  53 /*---------------------  Static Variables  --------------------------*/
  54 static int msglevel = MSG_LEVEL_INFO;
  55 /*---------------------  Static Functions  --------------------------*/
  56
  57 /*---------------------  Export Variables  --------------------------*/
  58
  59 /*---------------------  Export Functions  --------------------------*/
  60
  61 /*+
  62  *
  63  * Routine Description:
  64  * Enable hw power saving functions
  65  *
  66  * Return Value:
  67  *    None.
  68  *
  69  -*/
  70
  71 void
  72 PSvEnablePowerSaving(
  73         void *hDeviceContext,
  74         unsigned short wListenInterval
  75 )
  76 {
  77         PSDevice        pDevice = (PSDevice)hDeviceContext;
  78         PSMgmtObject    pMgmt = pDevice->pMgmt;
  79         unsigned short wAID = pMgmt->wCurrAID | BIT14 | BIT15;
  80
  81         // set period of power up before TBTT
  82         VNSvOutPortW(pDevice->PortOffset + MAC_REG_PWBT, C_PWBT);
  83         if (pDevice->eOPMode != OP_MODE_ADHOC) {
  84                 // set AID
  85                 VNSvOutPortW(pDevice->PortOffset + MAC_REG_AIDATIM, wAID);
  86         } else {
  87                 // set ATIM Window
  88                 MACvWriteATIMW(pDevice->PortOffset, pMgmt->wCurrATIMWindow);
  89         }
  90         // Set AutoSleep
  91         MACvRegBitsOn(pDevice->PortOffset, MAC_REG_PSCFG, PSCFG_AUTOSLEEP);
  92         // Set HWUTSF
  93         MACvRegBitsOn(pDevice->PortOffset, MAC_REG_TFTCTL, TFTCTL_HWUTSF);
  94
  95         if (wListenInterval >= 2) {
  96                 // clear always listen beacon
  97                 MACvRegBitsOff(pDevice->PortOffset, MAC_REG_PSCTL, PSCTL_ALBCN);
  98                 // first time set listen next beacon
  99                 MACvRegBitsOn(pDevice->PortOffset, MAC_REG_PSCTL, PSCTL_LNBCN);
 100                 pMgmt->wCountToWakeUp = wListenInterval;
 101         } else {
 102                 // always listen beacon
 103                 MACvRegBitsOn(pDevice->PortOffset, MAC_REG_PSCTL, PSCTL_ALBCN);
 104                 pMgmt->wCountToWakeUp = 0;
 105         }
 106
 107         // enable power saving hw function
 108         MACvRegBitsOn(pDevice->PortOffset, MAC_REG_PSCTL, PSCTL_PSEN);
 109         pDevice->bEnablePSMode = true;
 110
 111         /* We don't send null pkt in ad hoc mode since beacon will handle this. */
 112         if (pDevice->eOPMode != OP_MODE_ADHOC && pDevice->eOPMode == OP_MODE_INFRASTRUCTURE)
 113                 PSbSendNullPacket(pDevice);
 114
 115         pDevice->bPWBitOn = true;
 116         DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "PS:Power Saving Mode Enable... \n");
 117         return;
 118 }
 119
 120 /*+
 121  *
 122  * Routine Description:
 123  * Disable hw power saving functions
 124  *
 125  * Return Value:
 126  *    None.
 127  *
 128  -*/
 129
 130 void
 131 PSvDisablePowerSaving(
 132         void *hDeviceContext
 133 )
 134 {
 135         PSDevice        pDevice = (PSDevice)hDeviceContext;
 136
 137         // disable power saving hw function
 138         MACbPSWakeup(pDevice->PortOffset);
 139         //clear AutoSleep
 140         MACvRegBitsOff(pDevice->PortOffset, MAC_REG_PSCFG, PSCFG_AUTOSLEEP);
 141         //clear HWUTSF
 142         MACvRegBitsOff(pDevice->PortOffset, MAC_REG_TFTCTL, TFTCTL_HWUTSF);
 143         // set always listen beacon
 144         MACvRegBitsOn(pDevice->PortOffset, MAC_REG_PSCTL, PSCTL_ALBCN);
 145
 146         pDevice->bEnablePSMode = false;
 147
 148         if (pDevice->eOPMode == OP_MODE_INFRASTRUCTURE)
 149                 PSbSendNullPacket(pDevice);
 150
 151         pDevice->bPWBitOn = false;
 152         return;
 153 }
 154
 155 /*+
 156  *
 157  * Routine Description:
 158  * Consider to power down when no more packets to tx or rx.
 159  *
 160  * Return Value:
 161  *    true, if power down success
 162  *    false, if fail
 163  -*/
 164
 165 bool
 166 PSbConsiderPowerDown(
 167         void *hDeviceContext,
 168         bool bCheckRxDMA,
 169         bool bCheckCountToWakeUp
 170 )
 171 {
 172         PSDevice        pDevice = (PSDevice)hDeviceContext;
 173         PSMgmtObject    pMgmt = pDevice->pMgmt;
 174         unsigned int uIdx;
 175
 176         // check if already in Doze mode
 177         if (MACbIsRegBitsOn(pDevice->PortOffset, MAC_REG_PSCTL, PSCTL_PS))
 178                 return true;
 179
 180         if (pMgmt->eCurrMode != WMAC_MODE_IBSS_STA) {
 181                 // check if in TIM wake period
 182                 if (pMgmt->bInTIMWake)
 183                         return false;
 184         }
 185
 186         // check scan state
 187         if (pDevice->bCmdRunning)
 188                 return false;
 189
 190         // Force PSEN on
 191         MACvRegBitsOn(pDevice->PortOffset, MAC_REG_PSCTL, PSCTL_PSEN);
 192
 193         // check if all TD are empty,
 194         for (uIdx = 0; uIdx < TYPE_MAXTD; uIdx++) {
 195                 if (pDevice->iTDUsed[uIdx] != 0)
 196                         return false;
 197         }
 198
 199         // check if rx isr is clear
 200         if (bCheckRxDMA &&
 201             ((pDevice->dwIsr & ISR_RXDMA0) != 0) &&
 202             ((pDevice->dwIsr & ISR_RXDMA1) != 0)) {
 203                 return false;
 204         }
 205
 206         if (pMgmt->eCurrMode != WMAC_MODE_IBSS_STA) {
 207                 if (bCheckCountToWakeUp &&
 208                     (pMgmt->wCountToWakeUp == 0 || pMgmt->wCountToWakeUp == 1)) {
 209                         return false;
 210                 }
 211         }
 212
 213         // no Tx, no Rx isr, now go to Doze
 214         MACvRegBitsOn(pDevice->PortOffset, MAC_REG_PSCTL, PSCTL_GO2DOZE);
 215         DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "Go to Doze ZZZZZZZZZZZZZZZ\n");
 216         return true;
 217 }
 218
 219 /*+
 220  *
 221  * Routine Description:
 222  * Send PS-POLL packet
 223  *
 224  * Return Value:
 225  *    None.
 226  *
 227  -*/
 228
 229 void
 230 PSvSendPSPOLL(
 231         void *hDeviceContext
 232 )
 233 {
 234         PSDevice            pDevice = (PSDevice)hDeviceContext;
 235         PSMgmtObject        pMgmt = pDevice->pMgmt;
 236         PSTxMgmtPacket      pTxPacket = NULL;
 237
 238         memset(pMgmt->pbyPSPacketPool, 0, sizeof(STxMgmtPacket) + WLAN_HDR_ADDR2_LEN);
 239         pTxPacket = (PSTxMgmtPacket)pMgmt->pbyPSPacketPool;
 240         pTxPacket->p80211Header = (PUWLAN_80211HDR)((unsigned char *)pTxPacket + sizeof(STxMgmtPacket));
 241         pTxPacket->p80211Header->sA2.wFrameCtl = cpu_to_le16(
 242                 (
 243                         WLAN_SET_FC_FTYPE(WLAN_TYPE_CTL) |
 244                         WLAN_SET_FC_FSTYPE(WLAN_FSTYPE_PSPOLL) |
 245                         WLAN_SET_FC_PWRMGT(0)
 246 ));
 247         pTxPacket->p80211Header->sA2.wDurationID = pMgmt->wCurrAID | BIT14 | BIT15;
 248         memcpy(pTxPacket->p80211Header->sA2.abyAddr1, pMgmt->abyCurrBSSID, WLAN_ADDR_LEN);
 249         memcpy(pTxPacket->p80211Header->sA2.abyAddr2, pMgmt->abyMACAddr, WLAN_ADDR_LEN);
 250         pTxPacket->cbMPDULen = WLAN_HDR_ADDR2_LEN;
 251         pTxPacket->cbPayloadLen = 0;
 252         // send the frame
 253         if (csMgmt_xmit(pDevice, pTxPacket) != CMD_STATUS_PENDING) {
 254                 DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "Send PS-Poll packet failed..\n");
 255         }
 256
 257         return;
 258 }
 259
 260 /*+
 261  *
 262  * Routine Description:
 263  * Send NULL packet to AP for notification power state of STA
 264  *
 265  * Return Value:
 266  *    None.
 267  *
 268  -*/
 269 bool
 270 PSbSendNullPacket(
 271         void *hDeviceContext
 272 )
 273 {
 274         PSDevice            pDevice = (PSDevice)hDeviceContext;
 275         PSTxMgmtPacket      pTxPacket = NULL;
 276         PSMgmtObject        pMgmt = pDevice->pMgmt;
 277         unsigned int uIdx;
 278
 279         if (!pDevice->bLinkPass)
 280                 return false;
 281
 282 #ifdef TxInSleep
 283         if (!pDevice->bEnablePSMode && !pDevice->fTxDataInSleep)
 284                 return false;
 285 #else
 286         if (!pDevice->bEnablePSMode)
 287                 return false;
 288 #endif
 289         if (pDevice->bEnablePSMode) {
 290                 for (uIdx = 0; uIdx < TYPE_MAXTD; uIdx++) {
 291                         if (pDevice->iTDUsed[uIdx] != 0)
 292                                 return false;
 293                 }
 294         }
 295
 296         memset(pMgmt->pbyPSPacketPool, 0, sizeof(STxMgmtPacket) + WLAN_NULLDATA_FR_MAXLEN);
 297         pTxPacket = (PSTxMgmtPacket)pMgmt->pbyPSPacketPool;
 298         pTxPacket->p80211Header = (PUWLAN_80211HDR)((unsigned char *)pTxPacket + sizeof(STxMgmtPacket));
 299
 300         if (pDevice->bEnablePSMode) {
 301                 pTxPacket->p80211Header->sA3.wFrameCtl = cpu_to_le16(
 302                         (
 303                                 WLAN_SET_FC_FTYPE(WLAN_TYPE_DATA) |
 304                                 WLAN_SET_FC_FSTYPE(WLAN_FSTYPE_NULL) |
 305                                 WLAN_SET_FC_PWRMGT(1)
 306 ));
 307         } else {
 308                 pTxPacket->p80211Header->sA3.wFrameCtl = cpu_to_le16(
 309                         (
 310                                 WLAN_SET_FC_FTYPE(WLAN_TYPE_DATA) |
 311                                 WLAN_SET_FC_FSTYPE(WLAN_FSTYPE_NULL) |
 312                                 WLAN_SET_FC_PWRMGT(0)
 313 ));
 314         }
 315
 316         if (pMgmt->eCurrMode != WMAC_MODE_IBSS_STA)
 317                 pTxPacket->p80211Header->sA3.wFrameCtl |= cpu_to_le16((unsigned short)WLAN_SET_FC_TODS(1));
 318
 319         memcpy(pTxPacket->p80211Header->sA3.abyAddr1, pMgmt->abyCurrBSSID, WLAN_ADDR_LEN);
 320         memcpy(pTxPacket->p80211Header->sA3.abyAddr2, pMgmt->abyMACAddr, WLAN_ADDR_LEN);
 321         memcpy(pTxPacket->p80211Header->sA3.abyAddr3, pMgmt->abyCurrBSSID, WLAN_BSSID_LEN);
 322         pTxPacket->cbMPDULen = WLAN_HDR_ADDR3_LEN;
 323         pTxPacket->cbPayloadLen = 0;
 324         // send the frame
 325         if (csMgmt_xmit(pDevice, pTxPacket) != CMD_STATUS_PENDING) {
 326                 DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "Send Null Packet failed !\n");
 327                 return false;
 328         }
 329
 330         return true;
 331 }
 332
 333 /*+
 334  *
 335  * Routine Description:
 336  * Check if Next TBTT must wake up
 337  *
 338  * Return Value:
 339  *    None.
 340  *
 341  -*/
 342
 343 bool
 344 PSbIsNextTBTTWakeUp(
 345         void *hDeviceContext
 346 )
 347 {
 348         PSDevice         pDevice = (PSDevice)hDeviceContext;
 349         PSMgmtObject        pMgmt = pDevice->pMgmt;
 350         bool bWakeUp = false;
 351
 352         if (pMgmt->wListenInterval >= 2) {
 353                 if (pMgmt->wCountToWakeUp == 0)
 354                         pMgmt->wCountToWakeUp = pMgmt->wListenInterval;
 355
 356                 pMgmt->wCountToWakeUp--;
 357
 358                 if (pMgmt->wCountToWakeUp == 1) {
 359                         // Turn on wake up to listen next beacon
 360                         MACvRegBitsOn(pDevice->PortOffset, MAC_REG_PSCTL, PSCTL_LNBCN);
 361                         bWakeUp = true;
 362                 }
 363
 364         }
 365
 366         return bWakeUp;
 367 }