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#include "headers.h"
/*this is transmit call-back(BULK OUT)*/
static void write_bulk_callback(struct urb *urb/*, struct pt_regs *regs*/)
{
PUSB_TCB pTcb= (PUSB_TCB)urb->context;
PS_INTERFACE_ADAPTER psIntfAdapter = pTcb->psIntfAdapter;
CONTROL_MESSAGE *pControlMsg = (CONTROL_MESSAGE *)urb->transfer_buffer;
PMINI_ADAPTER psAdapter = psIntfAdapter->psAdapter ;
BOOLEAN bpowerDownMsg = FALSE ;
PMINI_ADAPTER Adapter = GET_BCM_ADAPTER(gblpnetdev);
if (unlikely(netif_msg_tx_done(Adapter)))
pr_info(PFX "%s: transmit status %d\n", Adapter->dev->name, urb->status);
if(urb->status != STATUS_SUCCESS)
{
if(urb->status == -EPIPE)
{
psIntfAdapter->psAdapter->bEndPointHalted = TRUE ;
wake_up(&psIntfAdapter->psAdapter->tx_packet_wait_queue);
}
else
{
BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, NEXT_SEND, DBG_LVL_ALL,"Tx URB has got cancelled. status :%d", urb->status);
}
}
pTcb->bUsed = FALSE;
atomic_dec(&psIntfAdapter->uNumTcbUsed);
if(TRUE == psAdapter->bPreparingForLowPowerMode)
{
if(((pControlMsg->szData[0] == GO_TO_IDLE_MODE_PAYLOAD) &&
(pControlMsg->szData[1] == TARGET_CAN_GO_TO_IDLE_MODE)))
{
bpowerDownMsg = TRUE ;
//This covers the bus err while Idle Request msg sent down.
if(urb->status != STATUS_SUCCESS)
{
psAdapter->bPreparingForLowPowerMode = FALSE ;
BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, NEXT_SEND, DBG_LVL_ALL,"Idle Mode Request msg failed to reach to Modem");
//Signalling the cntrl pkt path in Ioctl
wake_up(&psAdapter->lowpower_mode_wait_queue);
StartInterruptUrb(psIntfAdapter);
goto err_exit;
}
if(psAdapter->bDoSuspend == FALSE)
{
psAdapter->IdleMode = TRUE;
//since going in Idle mode completed hence making this var false;
psAdapter->bPreparingForLowPowerMode = FALSE ;
BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, NEXT_SEND, DBG_LVL_ALL, "Host Entered in Idle Mode State...");
//Signalling the cntrl pkt path in Ioctl
wake_up(&psAdapter->lowpower_mode_wait_queue);
}
}
else if((pControlMsg->Leader.Status == LINK_UP_CONTROL_REQ) &&
(pControlMsg->szData[0] == LINK_UP_ACK) &&
(pControlMsg->szData[1] == LINK_SHUTDOWN_REQ_FROM_FIRMWARE) &&
(pControlMsg->szData[2] == SHUTDOWN_ACK_FROM_DRIVER))
{
//This covers the bus err while shutdown Request msg sent down.
if(urb->status != STATUS_SUCCESS)
{
psAdapter->bPreparingForLowPowerMode = FALSE ;
BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, NEXT_SEND, DBG_LVL_ALL,"Shutdown Request Msg failed to reach to Modem");
//Signalling the cntrl pkt path in Ioctl
wake_up(&psAdapter->lowpower_mode_wait_queue);
StartInterruptUrb(psIntfAdapter);
goto err_exit;
}
bpowerDownMsg = TRUE ;
if(psAdapter->bDoSuspend == FALSE)
{
psAdapter->bShutStatus = TRUE;
//since going in shutdown mode completed hence making this var false;
psAdapter->bPreparingForLowPowerMode = FALSE ;
BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, NEXT_SEND, DBG_LVL_ALL,"Host Entered in shutdown Mode State...");
//Signalling the cntrl pkt path in Ioctl
wake_up(&psAdapter->lowpower_mode_wait_queue);
}
}
if(psAdapter->bDoSuspend && bpowerDownMsg)
{
//issuing bus suspend request
BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, NEXT_SEND, DBG_LVL_ALL,"Issuing the Bus suspend request to USB stack");
psIntfAdapter->bPreparingForBusSuspend = TRUE;
schedule_work(&psIntfAdapter->usbSuspendWork);
}
}
err_exit :
usb_free_coherent(urb->dev, urb->transfer_buffer_length,
urb->transfer_buffer, urb->transfer_dma);
}
static PUSB_TCB GetBulkOutTcb(PS_INTERFACE_ADAPTER psIntfAdapter)
{
PUSB_TCB pTcb = NULL;
UINT index = 0;
if((atomic_read(&psIntfAdapter->uNumTcbUsed) < MAXIMUM_USB_TCB) &&
(psIntfAdapter->psAdapter->StopAllXaction ==FALSE))
{
index = atomic_read(&psIntfAdapter->uCurrTcb);
pTcb = &psIntfAdapter->asUsbTcb[index];
pTcb->bUsed = TRUE;
pTcb->psIntfAdapter= psIntfAdapter;
BCM_DEBUG_PRINT(psIntfAdapter->psAdapter,DBG_TYPE_TX, NEXT_SEND, DBG_LVL_ALL, "Got Tx desc %d used %d",
index, atomic_read(&psIntfAdapter->uNumTcbUsed));
index = (index + 1) % MAXIMUM_USB_TCB;
atomic_set(&psIntfAdapter->uCurrTcb, index);
atomic_inc(&psIntfAdapter->uNumTcbUsed);
}
return pTcb;
}
static int TransmitTcb(PS_INTERFACE_ADAPTER psIntfAdapter, PUSB_TCB pTcb, PVOID data, int len)
{
struct urb *urb = pTcb->urb;
int retval = 0;
urb->transfer_buffer = usb_alloc_coherent(psIntfAdapter->udev, len,
GFP_ATOMIC, &urb->transfer_dma);
if (!urb->transfer_buffer)
{
BCM_DEBUG_PRINT(psIntfAdapter->psAdapter,DBG_TYPE_PRINTK, 0, 0, "Error allocating memory\n");
return -ENOMEM;
}
memcpy(urb->transfer_buffer, data, len);
urb->transfer_buffer_length = len;
BCM_DEBUG_PRINT(psIntfAdapter->psAdapter,DBG_TYPE_TX, NEXT_SEND, DBG_LVL_ALL, "Sending Bulk out packet\n");
//For T3B,INT OUT end point will be used as bulk out end point
if((psIntfAdapter->psAdapter->chip_id == T3B) && (psIntfAdapter->bHighSpeedDevice == TRUE))
{
usb_fill_int_urb(urb, psIntfAdapter->udev,
psIntfAdapter->sBulkOut.bulk_out_pipe,
urb->transfer_buffer, len, write_bulk_callback, pTcb,
psIntfAdapter->sBulkOut.int_out_interval);
}
else
{
usb_fill_bulk_urb(urb, psIntfAdapter->udev,
psIntfAdapter->sBulkOut.bulk_out_pipe,
urb->transfer_buffer, len, write_bulk_callback, pTcb);
}
urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; /* For DMA transfer */
if(FALSE == psIntfAdapter->psAdapter->device_removed &&
FALSE == psIntfAdapter->psAdapter->bEndPointHalted &&
FALSE == psIntfAdapter->bSuspended &&
FALSE == psIntfAdapter->bPreparingForBusSuspend)
{
retval = usb_submit_urb(urb, GFP_ATOMIC);
if (retval)
{
BCM_DEBUG_PRINT(psIntfAdapter->psAdapter,DBG_TYPE_TX, NEXT_SEND, DBG_LVL_ALL, "failed submitting write urb, error %d", retval);
if(retval == -EPIPE)
{
psIntfAdapter->psAdapter->bEndPointHalted = TRUE ;
wake_up(&psIntfAdapter->psAdapter->tx_packet_wait_queue);
}
}
}
return retval;
}
int InterfaceTransmitPacket(PVOID arg, PVOID data, UINT len)
{
PUSB_TCB pTcb= NULL;
PS_INTERFACE_ADAPTER psIntfAdapter = (PS_INTERFACE_ADAPTER)arg;
pTcb= GetBulkOutTcb(psIntfAdapter);
if(pTcb == NULL)
{
BCM_DEBUG_PRINT(psIntfAdapter->psAdapter,DBG_TYPE_PRINTK, 0, 0, "No URB to transmit packet, dropping packet");
return -EFAULT;
}
return TransmitTcb(psIntfAdapter, pTcb, data, len);
}
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