Pileus Git - ~andy/linux/blob - drivers/staging/vt6656/int.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: int.c
  21  *
  22  * Purpose: Handle USB interrupt endpoint
  23  *
  24  * Author: Jerry Chen
  25  *
  26  * Date: Apr. 2, 2004
  27  *
  28  * Functions:
  29  *
  30  * Revision History:
  31  *      04-02-2004 Jerry Chen:  Initial release
  32  *
  33  */
  34
  35 #include "int.h"
  36 #include "tmacro.h"
  37 #include "mac.h"
  38 #include "power.h"
  39 #include "bssdb.h"
  40 #include "usbpipe.h"
  41
  42 static int msglevel = MSG_LEVEL_INFO; /* MSG_LEVEL_DEBUG */
  43
  44 /*+
  45  *
  46  *  Function:   InterruptPollingThread
  47  *
  48  *  Synopsis:   Thread running at IRQL PASSIVE_LEVEL.
  49  *
  50  *  Arguments: Device Extension
  51  *
  52  *  Returns:
  53  *
  54  *  Algorithm:  Call USBD for input data;
  55  *
  56  *  History:    dd-mm-yyyy   Author    Comment
  57  *
  58  *
  59  *  Notes:
  60  *
  61  *  USB reads are by nature 'Blocking', and when in a read, the device looks
  62  *  like it's in a 'stall' condition, so we deliberately time out every second
  63  *  if we've gotten no data
  64  *
  65 -*/
  66 void INTvWorkItem(struct vnt_private *pDevice)
  67 {
  68         int ntStatus;
  69
  70         DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"---->Interrupt Polling Thread\n");
  71
  72         spin_lock_irq(&pDevice->lock);
  73         if (pDevice->fKillEventPollingThread != true)
  74                 ntStatus = PIPEnsInterruptRead(pDevice);
  75         spin_unlock_irq(&pDevice->lock);
  76 }
  77
  78 void INTnsProcessData(struct vnt_private *pDevice)
  79 {
  80         PSINTData pINTData;
  81         struct vnt_manager *pMgmt = &pDevice->vnt_mgmt;
  82         struct net_device_stats *pStats = &pDevice->stats;
  83
  84         DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"---->s_nsInterruptProcessData\n");
  85
  86         pINTData = (PSINTData) pDevice->intBuf.pDataBuf;
  87         if (pINTData->byTSR0 & TSR_VALID) {
  88                 if (pINTData->byTSR0 & (TSR_TMO | TSR_RETRYTMO))
  89                         pDevice->wstats.discard.retries++;
  90                 else
  91                         pStats->tx_packets++;
  92
  93                 BSSvUpdateNodeTxCounter(pDevice,
  94                                         pINTData->byTSR0,
  95                                         pINTData->byPkt0);
  96                 /*DBG_PRN_GRP01(("TSR0 %02x\n", pINTData->byTSR0));*/
  97         }
  98         if (pINTData->byTSR1 & TSR_VALID) {
  99                 if (pINTData->byTSR1 & (TSR_TMO | TSR_RETRYTMO))
 100                         pDevice->wstats.discard.retries++;
 101                 else
 102                         pStats->tx_packets++;
 103
 104
 105                 BSSvUpdateNodeTxCounter(pDevice,
 106                                         pINTData->byTSR1,
 107                                         pINTData->byPkt1);
 108                 /*DBG_PRN_GRP01(("TSR1 %02x\n", pINTData->byTSR1));*/
 109         }
 110         if (pINTData->byTSR2 & TSR_VALID) {
 111                 if (pINTData->byTSR2 & (TSR_TMO | TSR_RETRYTMO))
 112                         pDevice->wstats.discard.retries++;
 113                 else
 114                         pStats->tx_packets++;
 115
 116                 BSSvUpdateNodeTxCounter(pDevice,
 117                                         pINTData->byTSR2,
 118                                         pINTData->byPkt2);
 119                 /*DBG_PRN_GRP01(("TSR2 %02x\n", pINTData->byTSR2));*/
 120         }
 121         if (pINTData->byTSR3 & TSR_VALID) {
 122                 if (pINTData->byTSR3 & (TSR_TMO | TSR_RETRYTMO))
 123                         pDevice->wstats.discard.retries++;
 124                 else
 125                         pStats->tx_packets++;
 126
 127                 BSSvUpdateNodeTxCounter(pDevice,
 128                                         pINTData->byTSR3,
 129                                         pINTData->byPkt3);
 130                 /*DBG_PRN_GRP01(("TSR3 %02x\n", pINTData->byTSR3));*/
 131         }
 132         if (pINTData->byISR0 != 0) {
 133                 if (pINTData->byISR0 & ISR_BNTX) {
 134                         if (pDevice->eOPMode == OP_MODE_AP) {
 135                                 if (pMgmt->byDTIMCount > 0) {
 136                                         pMgmt->byDTIMCount--;
 137                                         pMgmt->sNodeDBTable[0].bRxPSPoll =
 138                                                 false;
 139                                 } else if (pMgmt->byDTIMCount == 0) {
 140                                         /* check if multicast tx buffering */
 141                                         pMgmt->byDTIMCount =
 142                                                 pMgmt->byDTIMPeriod-1;
 143                                         pMgmt->sNodeDBTable[0].bRxPSPoll = true;
 144                                         if (pMgmt->sNodeDBTable[0].bPSEnable)
 145                                                 bScheduleCommand((void *) pDevice,
 146                                                                  WLAN_CMD_RX_PSPOLL,
 147                                                                  NULL);
 148                                 }
 149                                 bScheduleCommand((void *) pDevice,
 150                                                 WLAN_CMD_BECON_SEND,
 151                                                 NULL);
 152                         } /* if (pDevice->eOPMode == OP_MODE_AP) */
 153                 pDevice->bBeaconSent = true;
 154                 } else {
 155                         pDevice->bBeaconSent = false;
 156                 }
 157                 if (pINTData->byISR0 & ISR_TBTT) {
 158                         if (pDevice->bEnablePSMode)
 159                                 bScheduleCommand((void *) pDevice,
 160                                                 WLAN_CMD_TBTT_WAKEUP,
 161                                                 NULL);
 162                         if (pDevice->bChannelSwitch) {
 163                                 pDevice->byChannelSwitchCount--;
 164                                 if (pDevice->byChannelSwitchCount == 0)
 165                                         bScheduleCommand((void *) pDevice,
 166                                                         WLAN_CMD_11H_CHSW,
 167                                                         NULL);
 168                         }
 169                 }
 170                 pDevice->qwCurrTSF = cpu_to_le64(pINTData->qwTSF);
 171                 /*DBG_PRN_GRP01(("ISR0 = %02x ,
 172                   LoTsf =  %08x,
 173                   HiTsf =  %08x\n",
 174                   pINTData->byISR0,
 175                   pINTData->dwLoTSF,
 176                   pINTData->dwHiTSF)); */
 177         }
 178         if (pINTData->byISR1 != 0)
 179                 if (pINTData->byISR1 & ISR_GPIO3)
 180                         bScheduleCommand((void *) pDevice,
 181                                         WLAN_CMD_RADIO,
 182                                         NULL);
 183         pDevice->intBuf.uDataLen = 0;
 184         pDevice->intBuf.bInUse = false;
 185
 186         pStats->tx_errors = pDevice->wstats.discard.retries;
 187         pStats->tx_dropped = pDevice->wstats.discard.retries;
 188 }