void dma_deinit(uint32_t dmaNdx, uint32_t chnNdx) {
assert(dmaNdx == 0);
HAL_ENTER_CRITICAL();
dma_idle.bmChnEn[dmaNdx] &= ~(1 << chnNdx);
if (0 == dma_idle.bmChnEn[dmaNdx]) {
DMA_Deinit(DMA0);
CLOCK_DisableClock(kCLOCK_Dma);
NVIC_DisableIRQ(DMA0_IRQn);
}
HAL_LEAVE_CRITICAL();
}
//------------------------------------------------------------------------------
//
// Function: DMA_Init
//
// Called by device manager to initialize device.
//
DWORD
DMA_Init(
LPCWSTR szContext,
LPCVOID pBusContext
)
{
DWORD rc = (DWORD)NULL;
UNREFERENCED_PARAMETER(pBusContext);
UNREFERENCED_PARAMETER(szContext);
DEBUGMSG(ZONE_FUNCTION, (
L"+DMA_Init(%s, 0x%08x)\r\n", szContext, pBusContext
));
// Create device structure
Device_t *pDevice = (Device_t *)LocalAlloc(LPTR, sizeof(Device_t));
if (pDevice == NULL)
{
DEBUGMSG(ZONE_ERROR, (L"ERROR: DMA_Init: "
L"Failed allocate DMA controller structure\r\n"
));
goto cleanUp;
}
// initialize memory
memset(pDevice, 0, sizeof(Device_t));
// Set cookie
pDevice->cookie = DMA_DEVICE_COOKIE;
// Initalize critical section
InitializeCriticalSection(&pDevice->cs);
// Read device parameters
if (GetDeviceRegistryParams(
szContext, pDevice, dimof(s_deviceRegParams), s_deviceRegParams
) != ERROR_SUCCESS)
{
DEBUGMSG(ZONE_ERROR, (L"ERROR: DMA_Init: "
L"Failed read DMA driver registry parameters\r\n"
));
goto cleanUp;
}
// Retrieve device ID
pDevice->SdmaDevice = SOCGetDMADevice(pDevice->SdmaIndex);
// Set hardware to full power
EnableDeviceClocks(pDevice->SdmaDevice, TRUE);
// DMA will be in smart idle mode so we don't need to
// ever set the power state of the DMA to D4
// initialize general dma controller
if (InitializeDevice(pDevice) == FALSE)
{
DEBUGMSG (ZONE_ERROR, (L"ERROR: DMA_Init: "
L"Failed to initialize device\r\n"
));
goto cleanUp;
}
rc = (DWORD)pDevice;
cleanUp:
if (rc == 0) DMA_Deinit((DWORD)pDevice);
DEBUGMSG(ZONE_FUNCTION, (L"-DMA_Init(rc = %d)\r\n", rc));
return rc;
}
