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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*/)
{
struct bcm_usb_tcb *pTcb = (struct bcm_usb_tcb *)urb->context;
struct bcm_interface_adapter *psIntfAdapter = pTcb->psIntfAdapter;
struct bcm_link_request *pControlMsg = (struct bcm_link_request *)urb->transfer_buffer;
struct bcm_mini_adapter *psAdapter = psIntfAdapter->psAdapter;
bool bpowerDownMsg = false;
struct bcm_mini_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 struct bcm_usb_tcb *GetBulkOutTcb(struct bcm_interface_adapter *psIntfAdapter)
{
struct bcm_usb_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(struct bcm_interface_adapter *psIntfAdapter, struct bcm_usb_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)
{
struct bcm_usb_tcb *pTcb = NULL;
struct bcm_interface_adapter *psIntfAdapter = 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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