/**
* \brief Disable TX & reset registers and descriptor list
* \param pDrv Pointer to GMAC Driver instance.
*/
static void GMACD_ResetTx(sGmacd *pDrv, gmacQueList_t queIdx)
{
Gmac *pHw = pDrv->pHw;
uint8_t *pTxBuffer = pDrv->queueList[queIdx].pTxBuffer;
sGmacTxDescriptor *pTd = pDrv->queueList[queIdx].pTxD;
uint32_t Index;
uint32_t Address;
/* Disable TX */
GMAC_TransmitEnable(pHw, 0);
/* Setup the TX descriptors. */
GCIRC_CLEAR(pDrv->queueList[queIdx].wTxHead, pDrv->queueList[queIdx].wTxTail);
for(Index = 0; Index < pDrv->queueList[queIdx].wTxListSize; Index++) {
Address = (uint32_t)(&(pTxBuffer[Index *
pDrv->queueList[queIdx].wTxBufferSize]));
pTd[Index].addr = Address;
pTd[Index].status.val = (uint32_t)GMAC_TX_USED_BIT;
}
pTd[pDrv->queueList[queIdx].wTxListSize - 1].status.val =
GMAC_TX_USED_BIT | GMAC_TX_WRAP_BIT;
/* Transmit Buffer Queue Pointer Register */
GMAC_SetTxQueue(pHw, (uint32_t)pTd, queIdx);
}
///////////////////////////////////////////////////////////////////////////////
// =============================================================================
//Function :Initialize necessary allocated buffer lists for GMAC Driver to transfer
// data.Must be invoked after GMACD_Init() but before RX/TX start.
//Paramters:pDrive, Pointer to GMAC Driver instance.
// pInit, Pointer to sGmacInit.
// queIdx, Pointer to gmacQueList_t for different queue.
//Returns :void
//Notification:If input address is not 8-byte aligned the address is automatically
// adjusted and the list size is reduced by one.
// =============================================================================
//this function to do the bd initialize,create the buffer describe with the memory
static void __MacBdSndInit(u32 qindex)
{
tagQueue *queue;
volatile tagSndBD *sndbd;
u32 i;
u32 address;
u32 status;
queue = &gMacDriver.queueList[qindex];
//initialize the send bd
status = GMAC_TX_USED_BIT;
for(i =0;i < queue->sndbdlen;i++)
{
sndbd = queue->sndbdtab + i;
address = (u32)(queue->sndmem + queue->sndbuflen*i);
sndbd->addr = address&GMAC_ADDRESS_MASK;
sndbd->status.val = status;
}
sndbd->status.val = status|GMAC_TX_WRAP_BIT; //the last one must be wrap
queue->sndbdcur = 0;
queue->sndbdlast = 0;
//set the address to the register
GMAC_SetTxQueue(gMacDriver.pHw, (u32)queue->sndbdtab, qindex);
return;
}
