void doDmaRxTransfer(unsigned short usbDevInst, unsigned int length,
unsigned char *buff, unsigned int endPoint)
{
hostPacketDesc *current_bd = 0;
usbInstance *usbInstance;
usbInstance = &(cppiInfo.usbInst[usbDevInst]);
current_bd = getFreeBd();
endPoint = USB_EP_TO_INDEX(endPoint);
/* Process the BD */
Cppi41DmaProcessBD(usbDevInst, current_bd, CPDMA_DIR_RX, buff, length, endPoint);
/* Clean the cache */
CacheWB((unsigned int)current_bd,sizeof(hostPacketDesc));
/*Submit the BD */
pushToSubmitQ(usbDevInst, usbInstance->rxEndPoint[endPoint].submitq, current_bd);
}
void doDmaTxTransfer(unsigned short usbDevInst, unsigned char *buff,
unsigned int length, unsigned int endPoint)
{
hostPacketDesc *current_bd = 0;
unsigned int numOfBlocks =0;
unsigned int residue;
unsigned int i;
usbInstance *usbInstance;
usbInstance = &(cppiInfo.usbInst[usbDevInst]);
endPoint = USB_EP_TO_INDEX(endPoint);
/*This code segment will take care of the transparent mode transaction */
if(CPDMA_MODE_SET_TRANSPARENT == usbInstance->txEndPoint[endPoint].mode)
{
/* If the data length is less than the USB packet size */
if(length < USB_PACKET_LENGTH)
{
/*get a free db from the BD pool */
current_bd = getFreeBd();
/*Clean the cache so that buffer will have proper data */
CacheWB((unsigned int)buff, length);
/*This API will initialize the BD fields */
Cppi41DmaProcessBD(usbDevInst, current_bd, CPDMA_DIR_TX, buff, length, endPoint);
current_bd->packetId = EOP;
/*Clean the cache so that bd will have proper data */
CacheWB((unsigned int)current_bd,sizeof(hostPacketDesc));
/*Submit the BD to the queue for transaction */
pushToSubmitQ(usbDevInst, usbInstance->txEndPoint[endPoint]
.submitq, current_bd);
}
/*If the length is more than packet size, then packetize it */
else
{
numOfBlocks = length / USB_PACKET_LENGTH;
residue = length - (numOfBlocks * USB_PACKET_LENGTH);
for(i=0; i < numOfBlocks; i++)
{
/*get a free db from the BD pool */
current_bd = getFreeBd();
CacheWB((unsigned int)&buff[i*USB_PACKET_LENGTH],
USB_PACKET_LENGTH);
/*This API will initialize the BD fields */
Cppi41DmaProcessBD(usbDevInst, current_bd, CPDMA_DIR_TX,
&buff[i*USB_PACKET_LENGTH], USB_PACKET_LENGTH, endPoint);
/*Set the packet id to identify the packet position */
if(numOfBlocks == 1)
current_bd->packetId = EOP;
else if(i==0)
current_bd->packetId = SOP;
else if((numOfBlocks != 1) && (i < (numOfBlocks -1)))
current_bd->packetId = MOP;
else if(i == (numOfBlocks -1) && residue == 0)
current_bd->packetId = EOP;
else
current_bd->packetId = MOP;
CacheWB((unsigned int)current_bd,sizeof(hostPacketDesc));
/*Submit the BD to the queue for transaction */
pushToSubmitQ(usbDevInst, usbInstance->txEndPoint[endPoint]
.submitq, current_bd);
}
/*If there are some remaining data then send it also */
if(residue)
{
/*get a free db from the BD pool */
current_bd = getFreeBd();
CacheWB((unsigned int)&buff[i*USB_PACKET_LENGTH], residue);
/*This API will initialize the BD fields */
Cppi41DmaProcessBD(usbDevInst, current_bd, CPDMA_DIR_TX,
&buff[i*USB_PACKET_LENGTH], residue, endPoint);
current_bd->packetId = EOP;
/*This API will initialize the BD fields */
CacheWB((unsigned int)current_bd,sizeof(hostPacketDesc));
/*Submit the BD to the queue for transaction */
pushToSubmitQ(usbDevInst, usbInstance->txEndPoint[endPoint]
.submitq, current_bd);
}
}
}
/*This segment of the code will take care of GRNIS mode of transaction */
else if(usbInstance->txEndPoint[endPoint].mode == CPDMA_MODE_SET_GRNDIS)
{
/*get a free db from the BD pool */
current_bd = getFreeBd();
CacheWB((unsigned int)buff, length);
/*This API will initialize the BD fields */
Cppi41DmaProcessBD(usbDevInst, current_bd, CPDMA_DIR_TX, buff, length, endPoint);
current_bd->packetId = EOP;
CacheWB((unsigned int)current_bd,sizeof(hostPacketDesc));
/*Submit the BD to the queue for transaction */
pushToSubmitQ(usbDevInst, usbInstance->txEndPoint[endPoint]
.submitq, current_bd);
}
}
void CleanDSPCache_LCD (void)
{
CacheWB((unsigned int)g_pucBuffer0, sizeof(g_pucBuffer0));
CacheWB((unsigned int)g_pucBuffer1, sizeof(g_pucBuffer1));
}