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         unsigned long flags;
  69         int ntStatus;
  70
  71         DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"---->Interrupt Polling Thread\n");
  72
  73         spin_lock_irqsave(&pDevice->lock, flags);
  74
  75         ntStatus = PIPEnsInterruptRead(pDevice);
  76
  77         spin_unlock_irqrestore(&pDevice->lock, flags);
  78 }
  79
  80 void INTnsProcessData(struct vnt_private *priv)
  81 {
  82         struct vnt_interrupt_data *int_data;
  83         struct vnt_manager *mgmt = &priv->vnt_mgmt;
  84         struct net_device_stats *stats = &priv->stats;
  85
  86         DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"---->s_nsInterruptProcessData\n");
  87
  88         int_data = (struct vnt_interrupt_data *)priv->int_buf.data_buf;
  89
  90         if (int_data->tsr0 & TSR_VALID) {
  91                 if (int_data->tsr0 & (TSR_TMO | TSR_RETRYTMO))
  92                         priv->wstats.discard.retries++;
  93                 else
  94                         stats->tx_packets++;
  95
  96                 BSSvUpdateNodeTxCounter(priv,
  97                                         int_data->tsr0,
  98                                         int_data->pkt0);
  99         }
 100
 101         if (int_data->tsr1 & TSR_VALID) {
 102                 if (int_data->tsr1 & (TSR_TMO | TSR_RETRYTMO))
 103                         priv->wstats.discard.retries++;
 104                 else
 105                         stats->tx_packets++;
 106
 107
 108                 BSSvUpdateNodeTxCounter(priv,
 109                                         int_data->tsr1,
 110                                         int_data->pkt1);
 111         }
 112
 113         if (int_data->tsr2 & TSR_VALID) {
 114                 if (int_data->tsr2 & (TSR_TMO | TSR_RETRYTMO))
 115                         priv->wstats.discard.retries++;
 116                 else
 117                         stats->tx_packets++;
 118
 119                 BSSvUpdateNodeTxCounter(priv,
 120                                         int_data->tsr2,
 121                                         int_data->pkt2);
 122         }
 123
 124         if (int_data->tsr3 & TSR_VALID) {
 125                 if (int_data->tsr3 & (TSR_TMO | TSR_RETRYTMO))
 126                         priv->wstats.discard.retries++;
 127                 else
 128                         stats->tx_packets++;
 129
 130                 BSSvUpdateNodeTxCounter(priv,
 131                                         int_data->tsr3,
 132                                         int_data->pkt3);
 133         }
 134
 135         if (int_data->isr0 != 0) {
 136                 if (int_data->isr0 & ISR_BNTX) {
 137                         if (priv->op_mode == NL80211_IFTYPE_AP) {
 138                                 if (mgmt->byDTIMCount > 0) {
 139                                         mgmt->byDTIMCount--;
 140                                         mgmt->sNodeDBTable[0].bRxPSPoll =
 141                                                 false;
 142                                 } else if (mgmt->byDTIMCount == 0) {
 143                                         /* check if multicast tx buffering */
 144                                         mgmt->byDTIMCount =
 145                                                 mgmt->byDTIMPeriod-1;
 146                                         mgmt->sNodeDBTable[0].bRxPSPoll = true;
 147                                         if (mgmt->sNodeDBTable[0].bPSEnable)
 148                                                 bScheduleCommand((void *) priv,
 149                                                                  WLAN_CMD_RX_PSPOLL,
 150                                                                  NULL);
 151                                 }
 152                                 bScheduleCommand((void *) priv,
 153                                                 WLAN_CMD_BECON_SEND,
 154                                                 NULL);
 155                         }
 156                         priv->bBeaconSent = true;
 157                 } else {
 158                         priv->bBeaconSent = false;
 159                 }
 160
 161                 if (int_data->isr0 & ISR_TBTT) {
 162                         if (priv->bEnablePSMode)
 163                                 bScheduleCommand((void *) priv,
 164                                                 WLAN_CMD_TBTT_WAKEUP,
 165                                                 NULL);
 166                         if (priv->bChannelSwitch) {
 167                                 priv->byChannelSwitchCount--;
 168                                 if (priv->byChannelSwitchCount == 0)
 169                                         bScheduleCommand((void *) priv,
 170                                                         WLAN_CMD_11H_CHSW,
 171                                                         NULL);
 172                         }
 173                 }
 174                 priv->qwCurrTSF = le64_to_cpu(int_data->tsf);
 175         }
 176
 177         if (int_data->isr1 != 0)
 178                 if (int_data->isr1 & ISR_GPIO3)
 179                         bScheduleCommand((void *) priv,
 180                                         WLAN_CMD_RADIO,
 181                                         NULL);
 182
 183         priv->int_buf.in_use = false;
 184
 185         stats->tx_errors = priv->wstats.discard.retries;
 186         stats->tx_dropped = priv->wstats.discard.retries;
 187 }