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#include "headers.h"
static void read_int_callback(struct urb *urb/*, struct pt_regs *regs*/)
{
int status = urb->status;
struct bcm_interface_adapter *psIntfAdapter = (struct bcm_interface_adapter *)urb->context;
struct bcm_mini_adapter *Adapter = psIntfAdapter->psAdapter ;
if (netif_msg_intr(Adapter))
pr_info(PFX "%s: interrupt status %d\n",
Adapter->dev->name, status);
if(Adapter->device_removed == TRUE)
{
BCM_DEBUG_PRINT(Adapter,DBG_TYPE_OTHERS, INTF_INIT, DBG_LVL_ALL,"Device has Got Removed.");
return ;
}
if(((Adapter->bPreparingForLowPowerMode == TRUE) && (Adapter->bDoSuspend == TRUE)) ||
psIntfAdapter->bSuspended ||
psIntfAdapter->bPreparingForBusSuspend)
{
BCM_DEBUG_PRINT(Adapter,DBG_TYPE_OTHERS, INTF_INIT, DBG_LVL_ALL,"Interrupt call back is called while suspending the device");
return ;
}
//BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, NEXT_SEND, DBG_LVL_ALL, "interrupt urb status %d", status);
switch (status) {
/* success */
case STATUS_SUCCESS:
if ( urb->actual_length )
{
if(psIntfAdapter->ulInterruptData[1] & 0xFF)
{
BCM_DEBUG_PRINT(Adapter,DBG_TYPE_OTHERS, INTF_INIT, DBG_LVL_ALL, "Got USIM interrupt");
}
if(psIntfAdapter->ulInterruptData[1] & 0xFF00)
{
atomic_set(&Adapter->CurrNumFreeTxDesc,
(psIntfAdapter->ulInterruptData[1] & 0xFF00) >> 8);
atomic_set (&Adapter->uiMBupdate, TRUE);
BCM_DEBUG_PRINT(Adapter,DBG_TYPE_OTHERS, INTF_INIT, DBG_LVL_ALL, "TX mailbox contains %d",
atomic_read(&Adapter->CurrNumFreeTxDesc));
}
if(psIntfAdapter->ulInterruptData[1] >> 16)
{
Adapter->CurrNumRecvDescs=
(psIntfAdapter->ulInterruptData[1] >> 16);
BCM_DEBUG_PRINT(Adapter,DBG_TYPE_OTHERS, INTF_INIT, DBG_LVL_ALL,"RX mailbox contains %d",
Adapter->CurrNumRecvDescs);
InterfaceRx(psIntfAdapter);
}
if(Adapter->fw_download_done &&
!Adapter->downloadDDR &&
atomic_read(&Adapter->CurrNumFreeTxDesc))
{
psIntfAdapter->psAdapter->downloadDDR +=1;
wake_up(&Adapter->tx_packet_wait_queue);
}
if(FALSE == Adapter->waiting_to_fw_download_done)
{
Adapter->waiting_to_fw_download_done = TRUE;
wake_up(&Adapter->ioctl_fw_dnld_wait_queue);
}
if(!atomic_read(&Adapter->TxPktAvail))
{
atomic_set(&Adapter->TxPktAvail, 1);
wake_up(&Adapter->tx_packet_wait_queue);
}
BCM_DEBUG_PRINT(Adapter,DBG_TYPE_OTHERS, INTF_INIT, DBG_LVL_ALL,"Firing interrupt in URB");
}
break;
case -ENOENT :
{
BCM_DEBUG_PRINT(Adapter,DBG_TYPE_OTHERS, INTF_INIT, DBG_LVL_ALL,"URB has got disconnected ....");
return ;
}
case -EINPROGRESS:
{
//This situation may happened when URBunlink is used. for detail check usb_unlink_urb documentation.
BCM_DEBUG_PRINT(Adapter,DBG_TYPE_OTHERS, INTF_INIT, DBG_LVL_ALL,"Impossibe condition has occurred... something very bad is going on");
break ;
//return;
}
case -EPIPE:
{
BCM_DEBUG_PRINT(Adapter,DBG_TYPE_OTHERS, INTF_INIT, DBG_LVL_ALL,"Interrupt IN endPoint has got halted/stalled...need to clear this");
Adapter->bEndPointHalted = TRUE ;
wake_up(&Adapter->tx_packet_wait_queue);
urb->status = STATUS_SUCCESS ;
return;
}
/* software-driven interface shutdown */
case -ECONNRESET: //URB got unlinked.
case -ESHUTDOWN: // hardware gone. this is the serious problem.
//Occurs only when something happens with the host controller device
case -ENODEV : //Device got removed
case -EINVAL : //Some thing very bad happened with the URB. No description is available.
BCM_DEBUG_PRINT(Adapter,DBG_TYPE_OTHERS, INTF_INIT, DBG_LVL_ALL,"interrupt urb error %d", status);
urb->status = STATUS_SUCCESS ;
break ;
//return;
default:
//This is required to check what is the defaults conditions when it occurs..
BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, NEXT_SEND, DBG_LVL_ALL,"GOT DEFAULT INTERRUPT URB STATUS :%d..Please Analyze it...", status);
break;
}
StartInterruptUrb(psIntfAdapter);
}
int CreateInterruptUrb(struct bcm_interface_adapter *psIntfAdapter)
{
psIntfAdapter->psInterruptUrb = usb_alloc_urb(0, GFP_KERNEL);
if (!psIntfAdapter->psInterruptUrb)
{
BCM_DEBUG_PRINT(psIntfAdapter->psAdapter,DBG_TYPE_OTHERS, INTF_INIT, DBG_LVL_ALL,"Cannot allocate interrupt urb");
return -ENOMEM;
}
psIntfAdapter->psInterruptUrb->transfer_buffer =
psIntfAdapter->ulInterruptData;
psIntfAdapter->psInterruptUrb->transfer_buffer_length =
sizeof(psIntfAdapter->ulInterruptData);
psIntfAdapter->sIntrIn.int_in_pipe = usb_rcvintpipe(psIntfAdapter->udev,
psIntfAdapter->sIntrIn.int_in_endpointAddr);
usb_fill_int_urb(psIntfAdapter->psInterruptUrb, psIntfAdapter->udev,
psIntfAdapter->sIntrIn.int_in_pipe,
psIntfAdapter->psInterruptUrb->transfer_buffer,
psIntfAdapter->psInterruptUrb->transfer_buffer_length,
read_int_callback, psIntfAdapter,
psIntfAdapter->sIntrIn.int_in_interval);
BCM_DEBUG_PRINT(psIntfAdapter->psAdapter,DBG_TYPE_OTHERS, INTF_INIT, DBG_LVL_ALL,"Interrupt Interval: %d\n",
psIntfAdapter->sIntrIn.int_in_interval);
return 0;
}
INT StartInterruptUrb(struct bcm_interface_adapter *psIntfAdapter)
{
INT status = 0;
if( FALSE == psIntfAdapter->psAdapter->device_removed &&
FALSE == psIntfAdapter->psAdapter->bEndPointHalted &&
FALSE == psIntfAdapter->bSuspended &&
FALSE == psIntfAdapter->bPreparingForBusSuspend &&
FALSE == psIntfAdapter->psAdapter->StopAllXaction)
{
status = usb_submit_urb(psIntfAdapter->psInterruptUrb, GFP_ATOMIC);
if (status)
{
BCM_DEBUG_PRINT(psIntfAdapter->psAdapter,DBG_TYPE_OTHERS, INTF_INIT, DBG_LVL_ALL,"Cannot send int urb %d\n", status);
if(status == -EPIPE)
{
psIntfAdapter->psAdapter->bEndPointHalted = TRUE ;
wake_up(&psIntfAdapter->psAdapter->tx_packet_wait_queue);
}
}
}
return status;
}
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