/**
* Handles IN/OUT transfers on EP0
*
* @param [in] bEP Endpoint address
* @param [in] bEPStat Endpoint status
*/
void USBHandleControlTransfer(U8 bEP, U8 bEPStat)
{
int iChunk, iType;
if (bEP == 0x00) {
// OUT transfer
if (bEPStat & EP_STATUS_SETUP) {
// setup packet, reset request message state machine
USBHwEPRead(0x00, (U8 *)&Setup, sizeof(Setup));
DBG("S%x", Setup.bRequest);
// defaults for data pointer and residue
iType = REQTYPE_GET_TYPE(Setup.bmRequestType);
pbData = apbDataStore[iType];
iResidue = Setup.wLength;
iLen = Setup.wLength;
if ((Setup.wLength == 0) ||
(REQTYPE_GET_DIR(Setup.bmRequestType) == REQTYPE_DIR_TO_HOST)) {
// ask installed handler to process request
if (!_HandleRequest(&Setup, &iLen, &pbData)) {
DBG("_HandleRequest1 failed\n");
StallControlPipe(bEPStat);
return;
}
// send smallest of requested and offered length
iResidue = MIN(iLen, Setup.wLength);
// send first part (possibly a zero-length status message)
DataIn();
}
}
else {
if (iResidue > 0) {
// store data
iChunk = USBHwEPRead(0x00, pbData, iResidue);
if (iChunk < 0) {
StallControlPipe(bEPStat);
return;
}
pbData += iChunk;
iResidue -= iChunk;
if (iResidue == 0) {
// received all, send data to handler
iType = REQTYPE_GET_TYPE(Setup.bmRequestType);
pbData = apbDataStore[iType];
if (!_HandleRequest(&Setup, &iLen, &pbData)) {
DBG("_HandleRequest2 failed\n");
StallControlPipe(bEPStat);
return;
}
// send status to host
DataIn();
}
}
else {
// absorb zero-length status message
iChunk = USBHwEPRead(0x00, NULL, 0);
DBG(iChunk > 0 ? "?" : "");
}
}
}
else if (bEP == 0x80) {
// IN transfer
// send more data if available (possibly a 0-length packet)
DataIn();
}
else {
ASSERT(FALSE);
}
}
/*************************************************************************
USBHandleControlTransfer
========================
Handles IN/OUT transfers on EP0
**************************************************************************/
void USBHandleControlTransfer(U8 bEP, U8 bEPStat)
{
int iChunk;
if (bEP == 0x00) {
// OUT transfer
if (bEPStat & EP_STATUS_SETUP) {
// setup packet, reset request message state machine
USBHwEPRead(0x00, (U8 *)&Setup, &iLen);
//mmmm DBG("S%x", Setup.bRequest);
// defaults for data pointer and residue
pbData = abControlData;
iResidue = Setup.wLength;
iLen = Setup.wLength;
// ask installed handler to pre process request
if (!_PreHandleRequest(&Setup, &iLen, &pbData)) {
// silently ignore non installed handler
}
if ((Setup.wLength == 0) ||
(REQTYPE_GET_DIR(Setup.bmRequestType) == REQTYPE_DIR_TO_HOST)) {
// ask installed handler to process request
if (!_HandleRequest(&Setup, &iLen, &pbData)) {
DBG("_HandleRequest1 failed\n");
StallControlPipe(bEPStat);
return;
}
// send smallest of requested and offered length
iResidue = MIN(iLen, Setup.wLength);
// send first part (possibly a zero-length status message)
DataIn();
}
if ((Setup.wLength != 0) &&
(REQTYPE_GET_DIR(Setup.bmRequestType) == REQTYPE_DIR_TO_DEVICE)) {
if (!_PreHandleRequest(&Setup, &iLen, &pbData)) {
// this is not a must, might fail
}
}
}
else {
if (iResidue > 0) {
// store data
iChunk = 0;
USBHwEPRead(0x00, pbData, &iChunk);
pbData += iChunk;
iResidue -= iChunk;
if (iResidue == 0) {
// received all, send data to handler
// TODO set pointer correctly
pbData = abControlData;
if (!_HandleRequest(&Setup, &iLen, &pbData)) {
StallControlPipe(bEPStat);
DBG("_HandleRequest2 failed\n");
return;
}
// send status to host
DataIn();
}
}
else {
// absorb zero-length status message
USBHwEPRead(0x00, NULL, &iChunk);
DBG(iChunk > 0 ? "?" : "");
}
}
}
else if (bEP == 0x80) {
// IN transfer
// send more data if available (possibly a 0-length packet)
DataIn();
}
else {
ASSERT(FALSE);
}
}
