/**
*
* This function runs a self-test on the driver and hardware device. This self
* test performs a local loopback and verifies data can be sent and received.
*
* The time for this test is proportional to the baud rate that has been set
* prior to calling this function.
*
* The mode and control registers are restored before return.
*
* @param InstPtr is a pointer to the XDmaPs instance
*
* @return
*
* - XST_SUCCESS if the test was successful
* - XST_FAILURE if the test failed
*
* @note
*
* This function can hang if the hardware is not functioning properly.
*
******************************************************************************/
int XDmaPs_SelfTest(XDmaPs *InstPtr)
{
u32 BaseAddr = InstPtr->Config.BaseAddress;
int i;
if (XDmaPs_ReadReg(BaseAddr, XDMAPS_DBGSTATUS_OFFSET)
& XDMAPS_DBGSTATUS_BUSY)
return XST_FAILURE;
for (i = 0; i < XDMAPS_CHANNELS_PER_DEV; i++) {
if (XDmaPs_ReadReg(BaseAddr,
XDmaPs_CSn_OFFSET(i)))
return XST_FAILURE;
}
return XST_SUCCESS;
}
/**
* This function perform the reset sequence to the given dmaps interface by
* configuring the appropriate control bits in the dmaps specifc registers
* the dmaps reset squence involves the following steps
* Disable all the interuupts
* Clear the pending interrupts
* Kill all the active channel threads
* Kill the manager thread
*
* @param BaseAddress of the interface
*
* @return N/A
*
* @note
* This function will not modify the slcr registers that are relavant for
* dmaps controller
******************************************************************************/
void XDmaPs_ResetHw(u32 BaseAddress)
{
u32 DbgInst;
u32 WaitCount = 0;
u32 ChanIndex;
/* Disable all the interrupts */
XDmaPs_WriteReg(BaseAddress, XDMAPS_INTEN_OFFSET, 0x00);
/* Clear the interrupts */
XDmaPs_WriteReg(BaseAddress, XDMAPS_INTCLR_OFFSET, XDMAPS_INTCLR_ALL_MASK);
/* Kill the dma channel threads */
for (ChanIndex=0; ChanIndex < XDMAPS_CHANNELS_PER_DEV; ChanIndex++) {
while ((XDmaPs_ReadReg(BaseAddress, XDMAPS_DBGSTATUS_OFFSET)
& XDMAPS_DBGSTATUS_BUSY)
&& (WaitCount < XDMAPS_MAX_WAIT))
WaitCount++;
DbgInst = XDmaPs_DBGINST0(0, 0x01, ChanIndex, 1);
XDmaPs_WriteReg(BaseAddress, XDMAPS_DBGINST0_OFFSET, DbgInst);
XDmaPs_WriteReg(BaseAddress, XDMAPS_DBGINST1_OFFSET, 0x0);
XDmaPs_WriteReg(BaseAddress, XDMAPS_DBGCMD_OFFSET, 0x0);
}
/* Kill the manager thread */
DbgInst = XDmaPs_DBGINST0(0, 0x01, 0, 0);
XDmaPs_WriteReg(BaseAddress, XDMAPS_DBGINST0_OFFSET, DbgInst);
XDmaPs_WriteReg(BaseAddress, XDMAPS_DBGINST1_OFFSET, 0x0);
XDmaPs_WriteReg(BaseAddress, XDMAPS_DBGCMD_OFFSET, 0x0);
}