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
  74         ntStatus = PIPEnsInterruptRead(pDevice);
  75
  76         spin_unlock_irq(&pDevice->lock);
  77 }
  78
  79 void INTnsProcessData(struct vnt_private *priv)
  80 {
  81         struct vnt_interrupt_data *int_data;
  82         struct vnt_manager *mgmt = &priv->vnt_mgmt;
  83         struct net_device_stats *stats = &priv->stats;
  84
  85         DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"---->s_nsInterruptProcessData\n");
  86
  87         int_data = (struct vnt_interrupt_data *)priv->int_buf.data_buf;
  88
  89         if (int_data->tsr0 & TSR_VALID) {
  90                 if (int_data->tsr0 & (TSR_TMO | TSR_RETRYTMO))
  91                         priv->wstats.discard.retries++;
  92                 else
  93                         stats->tx_packets++;
  94
  95                 BSSvUpdateNodeTxCounter(priv,
  96                                         int_data->tsr0,
  97                                         int_data->pkt0);
  98         }
  99
 100         if (int_data->tsr1 & TSR_VALID) {
 101                 if (int_data->tsr1 & (TSR_TMO | TSR_RETRYTMO))
 102                         priv->wstats.discard.retries++;
 103                 else
 104                         stats->tx_packets++;
 105
 106
 107                 BSSvUpdateNodeTxCounter(priv,
 108                                         int_data->tsr1,
 109                                         int_data->pkt1);
 110         }
 111
 112         if (int_data->tsr2 & TSR_VALID) {
 113                 if (int_data->tsr2 & (TSR_TMO | TSR_RETRYTMO))
 114                         priv->wstats.discard.retries++;
 115                 else
 116                         stats->tx_packets++;
 117
 118                 BSSvUpdateNodeTxCounter(priv,
 119                                         int_data->tsr2,
 120                                         int_data->pkt2);
 121         }
 122
 123         if (int_data->tsr3 & TSR_VALID) {
 124                 if (int_data->tsr3 & (TSR_TMO | TSR_RETRYTMO))
 125                         priv->wstats.discard.retries++;
 126                 else
 127                         stats->tx_packets++;
 128
 129                 BSSvUpdateNodeTxCounter(priv,
 130                                         int_data->tsr3,
 131                                         int_data->pkt3);
 132         }
 133
 134         if (int_data->isr0 != 0) {
 135                 if (int_data->isr0 & ISR_BNTX) {
 136                         if (priv->op_mode == NL80211_IFTYPE_AP) {
 137                                 if (mgmt->byDTIMCount > 0) {
 138                                         mgmt->byDTIMCount--;
 139                                         mgmt->sNodeDBTable[0].bRxPSPoll =
 140                                                 false;
 141                                 } else if (mgmt->byDTIMCount == 0) {
 142                                         /* check if multicast tx buffering */
 143                                         mgmt->byDTIMCount =
 144                                                 mgmt->byDTIMPeriod-1;
 145                                         mgmt->sNodeDBTable[0].bRxPSPoll = true;
 146                                         if (mgmt->sNodeDBTable[0].bPSEnable)
 147                                                 bScheduleCommand((void *) priv,
 148                                                                  WLAN_CMD_RX_PSPOLL,
 149                                                                  NULL);
 150                                 }
 151                                 bScheduleCommand((void *) priv,
 152                                                 WLAN_CMD_BECON_SEND,
 153                                                 NULL);
 154                         }
 155                         priv->bBeaconSent = true;
 156                 } else {
 157                         priv->bBeaconSent = false;
 158                 }
 159
 160                 if (int_data->isr0 & ISR_TBTT) {
 161                         if (priv->bEnablePSMode)
 162                                 bScheduleCommand((void *) priv,
 163                                                 WLAN_CMD_TBTT_WAKEUP,
 164                                                 NULL);
 165                         if (priv->bChannelSwitch) {
 166                                 priv->byChannelSwitchCount--;
 167                                 if (priv->byChannelSwitchCount == 0)
 168                                         bScheduleCommand((void *) priv,
 169                                                         WLAN_CMD_11H_CHSW,
 170                                                         NULL);
 171                         }
 172                 }
 173                 priv->qwCurrTSF = le64_to_cpu(int_data->tsf);
 174         }
 175
 176         if (int_data->isr1 != 0)
 177                 if (int_data->isr1 & ISR_GPIO3)
 178                         bScheduleCommand((void *) priv,
 179                                         WLAN_CMD_RADIO,
 180                                         NULL);
 181
 182         priv->int_buf.in_use = false;
 183
 184         stats->tx_errors = priv->wstats.discard.retries;
 185         stats->tx_dropped = priv->wstats.discard.retries;
 186 }