/** @file\r
- OMAP35xx DMA abstractions modeled on PCI IO protocol. EnableDma()/DisableDma()\r
- are from OMAP35xx TRM. \r
+ Abstractions for simple OMAP DMA channel.\r
+ \r
\r
Copyright (c) 2008 - 2010, Apple Inc. All rights reserved.<BR>\r
\r
#include <Base.h>\r
#include <Library/DebugLib.h>\r
#include <Library/OmapDmaLib.h>\r
-#include <Library/MemoryAllocationLib.h>\r
-#include <Library/UefiBootServicesTableLib.h>\r
-#include <Library/UncachedMemoryAllocationLib.h>\r
#include <Library/IoLib.h>\r
+#include <Library/BaseMemoryLib.h>\r
#include <Omap3530/Omap3530.h>\r
\r
-#include <Protocol/Cpu.h>\r
-\r
-typedef struct {\r
- EFI_PHYSICAL_ADDRESS HostAddress;\r
- EFI_PHYSICAL_ADDRESS DeviceAddress;\r
- UINTN NumberOfBytes;\r
- DMA_MAP_OPERATION Operation;\r
-} MAP_INFO_INSTANCE;\r
-\r
-\r
-\r
-EFI_CPU_ARCH_PROTOCOL *gCpu;
\r
/** \r
Configure OMAP DMA Channel\r
@retval EFI_INVALID_PARAMETER Channel is not valid\r
@retval EFI_DEVICE_ERROR The system hardware could not map the requested information.\r
\r
-**/
-EFI_STATUS
-EFIAPI
-EnableDmaChannel (
- IN UINTN Channel,
- IN OMAP_DMA4 *DMA4
- )
-{
- UINT32 RegVal;
-
-
- if (Channel > DMA4_MAX_CHANNEL) {
- return EFI_INVALID_PARAMETER;
- }
-
+**/\r
+EFI_STATUS\r
+EFIAPI\r
+EnableDmaChannel (\r
+ IN UINTN Channel,\r
+ IN OMAP_DMA4 *DMA4\r
+ )\r
+{\r
+ UINT32 RegVal;\r
+\r
+\r
+ if (Channel > DMA4_MAX_CHANNEL) {\r
+ return EFI_INVALID_PARAMETER;\r
+ }\r
+\r
/* 1) Configure the transfer parameters in the logical DMA registers */\r
/*-------------------------------------------------------------------*/\r
\r
\r
/* - Set the destination frame index CDFI[31:0]*/\r
MmioWrite32 (DMA4_CDFI (Channel), DMA4->DestinationFrameIndex);\r
- \r
+ \r
+ MmioWrite32 (DMA4_CDFI (Channel), DMA4->DestinationFrameIndex);\r
+\r
+ // Enable all the status bits since we are polling\r
+ MmioWrite32 (DMA4_CICR (Channel), DMA4_CICR_ENABLE_ALL);\r
+ MmioWrite32 (DMA4_CSR (Channel), DMA4_CSR_RESET);\r
+\r
/* 2) Start the DMA transfer by Setting the enable bit CCR[7]=1 */\r
/*--------------------------------------------------------------*/\r
//write enable bit\r
- MmioOr32 (DMA4_CCR(0), DMA4_CCR_ENABLE); //Launch transfer
-
- return EFI_SUCCESS;
-}
-
+ MmioOr32 (DMA4_CCR(Channel), DMA4_CCR_ENABLE); //Launch transfer\r
+\r
+ return EFI_SUCCESS;\r
+}\r
+\r
/** \r
Turn of DMA channel configured by EnableDma().\r
\r
@param Channel DMA Channel to configure\r
+ @param SuccesMask Bits in DMA4_CSR register indicate EFI_SUCCESS\r
+ @param ErrorMask Bits in DMA4_CSR register indicate EFI_DEVICE_ERROR\r
\r
@retval EFI_SUCCESS DMA hardware disabled\r
@retval EFI_INVALID_PARAMETER Channel is not valid\r
@retval EFI_DEVICE_ERROR The system hardware could not map the requested information.\r
\r
-**/
-EFI_STATUS
-EFIAPI
-DisableDmaChannel (
- IN UINTN Channel
- )
-{
- if (Channel > DMA4_MAX_CHANNEL) {
- return EFI_INVALID_PARAMETER;
- }
-
- MmioAnd32 (DMA4_CCR(0), ~(DMA4_CCR_ENABLE | DMA4_CCR_RD_ACTIVE | DMA4_CCR_WR_ACTIVE));
- return EFI_SUCCESS;
-}
-
-/** \r
- Provides the DMA controller-specific addresses needed to access system memory.\r
- \r
- Operation is relative to the DMA bus master.\r
- \r
- @param Operation Indicates if the bus master is going to read or write to system memory.\r
- @param HostAddress The system memory address to map to the DMA controller.\r
- @param NumberOfBytes On input the number of bytes to map. On output the number of bytes\r
- that were mapped. \r
- @param DeviceAddress The resulting map address for the bus master controller to use to\r
- access the hosts HostAddress. \r
- @param Mapping A resulting value to pass to Unmap().\r
- \r
- @retval EFI_SUCCESS The range was mapped for the returned NumberOfBytes.\r
- @retval EFI_UNSUPPORTED The HostAddress cannot be mapped as a common buffer. \r
- @retval EFI_INVALID_PARAMETER One or more parameters are invalid.\r
- @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources.\r
- @retval EFI_DEVICE_ERROR The system hardware could not map the requested address.\r
- \r
-**/
-EFI_STATUS
-EFIAPI
-DmaMap (
- IN DMA_MAP_OPERATION Operation,
- IN VOID *HostAddress,\r
- IN OUT UINTN *NumberOfBytes,\r
- OUT PHYSICAL_ADDRESS *DeviceAddress,\r
- OUT VOID **Mapping\r
- )
-{
- MAP_INFO_INSTANCE *Map;
-
- if ( HostAddress == NULL || NumberOfBytes == NULL ||
- DeviceAddress == NULL || Mapping == NULL ) {
- return EFI_INVALID_PARAMETER;
- }
-
-
- if (Operation >= MapOperationMaximum) {
- return EFI_INVALID_PARAMETER;
- }
-
- *DeviceAddress = ConvertToPhysicalAddress (HostAddress);
-
- // Remember range so we can flush on the other side
- Map = AllocatePool (sizeof (MAP_INFO_INSTANCE));
- if (Map == NULL) {
- return EFI_OUT_OF_RESOURCES;
- }
-
- *Mapping = Map;
-
- Map->HostAddress = (UINTN)HostAddress;
- Map->DeviceAddress = *DeviceAddress;
- Map->NumberOfBytes = *NumberOfBytes;
- Map->Operation = Operation;
-
- // EfiCpuFlushTypeWriteBack, EfiCpuFlushTypeInvalidate
- gCpu->FlushDataCache (gCpu, (EFI_PHYSICAL_ADDRESS)(UINTN)HostAddress, *NumberOfBytes, EfiCpuFlushTypeWriteBackInvalidate);
-
- return EFI_SUCCESS;
-}
-
-
-/** \r
- Completes the DmaMapBusMasterRead(), DmaMapBusMasterWrite(), or DmaMapBusMasterCommonBuffer()\r
- operation and releases any corresponding resources.\r
- \r
- @param Mapping The mapping value returned from DmaMap*().\r
- \r
- @retval EFI_SUCCESS The range was unmapped.\r
- @retval EFI_DEVICE_ERROR The data was not committed to the target system memory.\r
- \r
-**/
-EFI_STATUS
-EFIAPI
-DmaUnmap (
- IN VOID *Mapping\r
- )
-{
- MAP_INFO_INSTANCE *Map;
-
- if (Mapping == NULL) {
- ASSERT (FALSE);
- return EFI_INVALID_PARAMETER;
- }
-
- Map = (MAP_INFO_INSTANCE *)Mapping;
- if (Map->Operation == MapOperationBusMasterWrite) {
- //
- // Make sure we read buffer from uncached memory and not the cache
- //
- gCpu->FlushDataCache (gCpu, Map->HostAddress, Map->NumberOfBytes, EfiCpuFlushTypeInvalidate);
- }
-
- FreePool (Map);
-
- return EFI_SUCCESS;
-}
-
-/** \r
- Allocates pages that are suitable for an DmaMap() of type MapOperationBusMasterCommonBuffer.\r
- mapping. \r
- \r
- @param MemoryType The type of memory to allocate, EfiBootServicesData or\r
- EfiRuntimeServicesData. \r
- @param Pages The number of pages to allocate. \r
- @param HostAddress A pointer to store the base system memory address of the\r
- allocated range. \r
-\r
- @retval EFI_SUCCESS The requested memory pages were allocated.\r
- @retval EFI_UNSUPPORTED Attributes is unsupported. The only legal attribute bits are\r
- MEMORY_WRITE_COMBINE and MEMORY_CACHED. \r
- @retval EFI_INVALID_PARAMETER One or more parameters are invalid.\r
- @retval EFI_OUT_OF_RESOURCES The memory pages could not be allocated. \r
- \r
-**/EFI_STATUS
-EFIAPI
-DmaAllocateBuffer (
- IN EFI_MEMORY_TYPE MemoryType,
- IN UINTN Pages,\r
- OUT VOID **HostAddress\r
- )\r
-{
- if (HostAddress == NULL) {
- return EFI_INVALID_PARAMETER;
- }
-
- //
- // The only valid memory types are EfiBootServicesData and EfiRuntimeServicesData
- //
- // We used uncached memory to keep coherency
- //
- if (MemoryType == EfiBootServicesData) {
- *HostAddress = UncachedAllocatePages (Pages);
- } else if (MemoryType != EfiRuntimeServicesData) {
- *HostAddress = UncachedAllocateRuntimePages (Pages);
- } else {
- return EFI_INVALID_PARAMETER;
- }
-
- return EFI_SUCCESS;
-}
-
-
-/** \r
- Frees memory that was allocated with DmaAllocateBuffer().\r
- \r
- @param Pages The number of pages to free. \r
- @param HostAddress The base system memory address of the allocated range. \r
- \r
- @retval EFI_SUCCESS The requested memory pages were freed.\r
- @retval EFI_INVALID_PARAMETER The memory range specified by HostAddress and Pages\r
- was not allocated with DmaAllocateBuffer().\r
- \r
**/\r
-EFI_STATUS
-EFIAPI
-DmaFreeBuffer (
- IN UINTN Pages,\r
- IN VOID *HostAddress\r
+EFI_STATUS\r
+EFIAPI\r
+DisableDmaChannel (\r
+ IN UINTN Channel,\r
+ IN UINT32 SuccessMask,\r
+ IN UINT32 ErrorMask\r
)\r
-{
- if (HostAddress == NULL) {
- return EFI_INVALID_PARAMETER;
- }
-
- UncachedFreePages (HostAddress, Pages);
- return EFI_SUCCESS;
-}
-
-
-EFI_STATUS
-EFIAPI
-OmapDmaLibConstructor (
- IN EFI_HANDLE ImageHandle,
- IN EFI_SYSTEM_TABLE *SystemTable
- )
-{
- EFI_STATUS Status;
-
- // Get the Cpu protocol for later use
- Status = gBS->LocateProtocol (&gEfiCpuArchProtocolGuid, NULL, (VOID **)&gCpu);
- ASSERT_EFI_ERROR(Status);
-
- return EFI_SUCCESS;
-}
-
+{\r
+ EFI_STATUS Status = EFI_SUCCESS;\r
+ UINT32 Reg;\r
+\r
+\r
+ if (Channel > DMA4_MAX_CHANNEL) {\r
+ return EFI_INVALID_PARAMETER;\r
+ }\r
+\r
+ do {\r
+ Reg = MmioRead32 (DMA4_CSR(Channel));\r
+ if ((Reg & ErrorMask) != 0) {\r
+ Status = EFI_DEVICE_ERROR;\r
+ DEBUG ((EFI_D_ERROR, "DMA Error (%d) %x\n", Channel, Reg));\r
+ break;\r
+ }\r
+ } while ((Reg & SuccessMask) != SuccessMask);\r
+\r
+\r
+ // Disable all status bits and clear them\r
+ MmioWrite32 (DMA4_CICR (Channel), 0);\r
+ MmioWrite32 (DMA4_CSR (Channel), DMA4_CSR_RESET);\r
+\r
+ MmioAnd32 (DMA4_CCR(0), ~(DMA4_CCR_ENABLE | DMA4_CCR_RD_ACTIVE | DMA4_CCR_WR_ACTIVE)); \r
+ return Status;\r
+}\r
+\r
+\r
+\r
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