drivers/staging/bcm/InterfaceIsr.c

   1 #include "headers.h"
   2
   3
   4 static void read_int_callback(struct urb *urb/*, struct pt_regs *regs*/)
   5 {
   6         int             status = urb->status;
   7         struct bcm_interface_adapter *psIntfAdapter = (struct bcm_interface_adapter *)urb->context;
   8         struct bcm_mini_adapter *Adapter = psIntfAdapter->psAdapter ;
   9
  10         if (netif_msg_intr(Adapter))
  11                 pr_info(PFX "%s: interrupt status %d\n",
  12                         Adapter->dev->name, status);
  13
  14         if(Adapter->device_removed == TRUE)
  15         {
  16                 BCM_DEBUG_PRINT(Adapter,DBG_TYPE_OTHERS, INTF_INIT, DBG_LVL_ALL,"Device has Got Removed.");
  17                 return ;
  18         }
  19
  20         if(((Adapter->bPreparingForLowPowerMode == TRUE) && (Adapter->bDoSuspend == TRUE)) ||
  21                 psIntfAdapter->bSuspended ||
  22                 psIntfAdapter->bPreparingForBusSuspend)
  23         {
  24                         BCM_DEBUG_PRINT(Adapter,DBG_TYPE_OTHERS, INTF_INIT, DBG_LVL_ALL,"Interrupt call back is called while suspending the device");
  25                         return ;
  26         }
  27
  28         //BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, NEXT_SEND, DBG_LVL_ALL, "interrupt urb status %d", status);
  29         switch (status) {
  30             /* success */
  31             case STATUS_SUCCESS:
  32                 if ( urb->actual_length )
  33                 {
  34
  35                         if(psIntfAdapter->ulInterruptData[1] & 0xFF)
  36                         {
  37                                 BCM_DEBUG_PRINT(Adapter,DBG_TYPE_OTHERS, INTF_INIT, DBG_LVL_ALL, "Got USIM interrupt");
  38                         }
  39
  40                         if(psIntfAdapter->ulInterruptData[1] & 0xFF00)
  41                         {
  42                                 atomic_set(&Adapter->CurrNumFreeTxDesc,
  43                                         (psIntfAdapter->ulInterruptData[1] & 0xFF00) >> 8);
  44                                 atomic_set (&Adapter->uiMBupdate, TRUE);
  45                                 BCM_DEBUG_PRINT(Adapter,DBG_TYPE_OTHERS, INTF_INIT, DBG_LVL_ALL, "TX mailbox contains %d",
  46                                         atomic_read(&Adapter->CurrNumFreeTxDesc));
  47                         }
  48                         if(psIntfAdapter->ulInterruptData[1] >> 16)
  49                         {
  50                                 Adapter->CurrNumRecvDescs=
  51                                         (psIntfAdapter->ulInterruptData[1]  >> 16);
  52                                 BCM_DEBUG_PRINT(Adapter,DBG_TYPE_OTHERS, INTF_INIT, DBG_LVL_ALL,"RX mailbox contains %d",
  53                                         Adapter->CurrNumRecvDescs);
  54                                 InterfaceRx(psIntfAdapter);
  55                         }
  56                         if(Adapter->fw_download_done &&
  57                                 !Adapter->downloadDDR &&
  58                                 atomic_read(&Adapter->CurrNumFreeTxDesc))
  59                         {
  60                                 psIntfAdapter->psAdapter->downloadDDR +=1;
  61                                 wake_up(&Adapter->tx_packet_wait_queue);
  62                         }
  63                         if(false == Adapter->waiting_to_fw_download_done)
  64                         {
  65                                 Adapter->waiting_to_fw_download_done = TRUE;
  66                                 wake_up(&Adapter->ioctl_fw_dnld_wait_queue);
  67                         }
  68                         if(!atomic_read(&Adapter->TxPktAvail))
  69                         {
  70                                 atomic_set(&Adapter->TxPktAvail, 1);
  71                                 wake_up(&Adapter->tx_packet_wait_queue);
  72                         }
  73                         BCM_DEBUG_PRINT(Adapter,DBG_TYPE_OTHERS, INTF_INIT, DBG_LVL_ALL,"Firing interrupt in URB");
  74                 }
  75                 break;
  76                 case -ENOENT :
  77                 {
  78                         BCM_DEBUG_PRINT(Adapter,DBG_TYPE_OTHERS, INTF_INIT, DBG_LVL_ALL,"URB has got disconnected ....");
  79                         return ;
  80                 }
  81                 case -EINPROGRESS:
  82                 {
  83                         //This situation may happened when URBunlink is used. for detail check usb_unlink_urb documentation.
  84                         BCM_DEBUG_PRINT(Adapter,DBG_TYPE_OTHERS, INTF_INIT, DBG_LVL_ALL,"Impossibe condition has occurred... something very bad is going on");
  85                         break ;
  86                         //return;
  87                 }
  88                 case -EPIPE:
  89                 {
  90                                 BCM_DEBUG_PRINT(Adapter,DBG_TYPE_OTHERS, INTF_INIT, DBG_LVL_ALL,"Interrupt IN endPoint  has got halted/stalled...need to clear this");
  91                                 Adapter->bEndPointHalted = TRUE ;
  92                                 wake_up(&Adapter->tx_packet_wait_queue);
  93                                 urb->status = STATUS_SUCCESS ;
  94                                 return;
  95                 }
  96             /* software-driven interface shutdown */
  97             case -ECONNRESET: //URB got unlinked.
  98             case -ESHUTDOWN:            // hardware gone. this is the serious problem.
  99                                                         //Occurs only when something happens with the host controller device
 100             case -ENODEV : //Device got removed
 101                 case -EINVAL : //Some thing very bad happened with the URB. No description is available.
 102                 BCM_DEBUG_PRINT(Adapter,DBG_TYPE_OTHERS, INTF_INIT, DBG_LVL_ALL,"interrupt urb error %d", status);
 103                         urb->status = STATUS_SUCCESS ;
 104                         break ;
 105                         //return;
 106             default:
 107                         //This is required to check what is the defaults conditions when it occurs..
 108                         BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, NEXT_SEND, DBG_LVL_ALL,"GOT DEFAULT INTERRUPT URB STATUS :%d..Please Analyze it...", status);
 109                 break;
 110         }
 111
 112         StartInterruptUrb(psIntfAdapter);
 113
 114
 115 }
 116
 117 int CreateInterruptUrb(struct bcm_interface_adapter *psIntfAdapter)
 118 {
 119         psIntfAdapter->psInterruptUrb = usb_alloc_urb(0, GFP_KERNEL);
 120         if (!psIntfAdapter->psInterruptUrb)
 121         {
 122                 BCM_DEBUG_PRINT(psIntfAdapter->psAdapter,DBG_TYPE_OTHERS, INTF_INIT, DBG_LVL_ALL,"Cannot allocate interrupt urb");
 123                 return -ENOMEM;
 124         }
 125         psIntfAdapter->psInterruptUrb->transfer_buffer =
 126                                                                 psIntfAdapter->ulInterruptData;
 127         psIntfAdapter->psInterruptUrb->transfer_buffer_length =
 128                                                         sizeof(psIntfAdapter->ulInterruptData);
 129
 130         psIntfAdapter->sIntrIn.int_in_pipe = usb_rcvintpipe(psIntfAdapter->udev,
 131                                                 psIntfAdapter->sIntrIn.int_in_endpointAddr);
 132
 133         usb_fill_int_urb(psIntfAdapter->psInterruptUrb, psIntfAdapter->udev,
 134                                         psIntfAdapter->sIntrIn.int_in_pipe,
 135                                         psIntfAdapter->psInterruptUrb->transfer_buffer,
 136                                         psIntfAdapter->psInterruptUrb->transfer_buffer_length,
 137                                         read_int_callback, psIntfAdapter,
 138                                         psIntfAdapter->sIntrIn.int_in_interval);
 139
 140         BCM_DEBUG_PRINT(psIntfAdapter->psAdapter,DBG_TYPE_OTHERS, INTF_INIT, DBG_LVL_ALL,"Interrupt Interval: %d\n",
 141                                 psIntfAdapter->sIntrIn.int_in_interval);
 142         return 0;
 143 }
 144
 145
 146 INT StartInterruptUrb(struct bcm_interface_adapter *psIntfAdapter)
 147 {
 148         INT status = 0;
 149
 150         if( false == psIntfAdapter->psAdapter->device_removed &&
 151                 false == psIntfAdapter->psAdapter->bEndPointHalted &&
 152                 false == psIntfAdapter->bSuspended &&
 153                 false == psIntfAdapter->bPreparingForBusSuspend &&
 154                 false == psIntfAdapter->psAdapter->StopAllXaction)
 155         {
 156                 status = usb_submit_urb(psIntfAdapter->psInterruptUrb, GFP_ATOMIC);
 157                 if (status)
 158                 {
 159                         BCM_DEBUG_PRINT(psIntfAdapter->psAdapter,DBG_TYPE_OTHERS, INTF_INIT, DBG_LVL_ALL,"Cannot send int urb %d\n", status);
 160                         if(status == -EPIPE)
 161                         {
 162                                 psIntfAdapter->psAdapter->bEndPointHalted = TRUE ;
 163                                 wake_up(&psIntfAdapter->psAdapter->tx_packet_wait_queue);
 164                         }
 165                 }
 166         }
 167         return status;
 168 }
 169