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audk/EmbeddedPkg/Universal/MmcDxe/Mmc.c

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/** @file
Main file of the MMC Dxe driver. The driver entrypoint is defined into this file.
Copyright (c) 2011-2013, ARM Limited. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <Protocol/DevicePath.h>
#include <Library/BaseLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/DevicePathLib.h>
#include "Mmc.h"
EFI_BLOCK_IO_MEDIA mMmcMediaTemplate = {
SIGNATURE_32 ('m', 'm', 'c', 'o'), // MediaId
TRUE, // RemovableMedia
FALSE, // MediaPresent
FALSE, // LogicalPartition
FALSE, // ReadOnly
FALSE, // WriteCaching
512, // BlockSize
4, // IoAlign
0, // Pad
0 // LastBlock
};
//
// This device structure is serviced as a header.
// Its next field points to the first root bridge device node.
//
LIST_ENTRY mMmcHostPool;
/**
Event triggered by the timer to check if any cards have been removed
or if new ones have been plugged in
**/
EFI_EVENT gCheckCardsEvent;
/**
Initialize the MMC Host Pool to support multiple MMC devices
**/
VOID
InitializeMmcHostPool (
VOID
)
{
InitializeListHead (&mMmcHostPool);
}
/**
Insert a new Mmc Host controller to the pool
**/
VOID
InsertMmcHost (
IN MMC_HOST_INSTANCE *MmcHostInstance
)
{
InsertTailList (&mMmcHostPool, &(MmcHostInstance->Link));
}
/*
Remove a new Mmc Host controller to the pool
*/
VOID
RemoveMmcHost (
IN MMC_HOST_INSTANCE *MmcHostInstance
)
{
RemoveEntryList (&(MmcHostInstance->Link));
}
MMC_HOST_INSTANCE *
CreateMmcHostInstance (
IN EFI_MMC_HOST_PROTOCOL *MmcHost
)
{
EFI_STATUS Status;
MMC_HOST_INSTANCE *MmcHostInstance;
EFI_DEVICE_PATH_PROTOCOL *NewDevicePathNode;
EFI_DEVICE_PATH_PROTOCOL *DevicePath;
MmcHostInstance = AllocateZeroPool (sizeof (MMC_HOST_INSTANCE));
if (MmcHostInstance == NULL) {
return NULL;
}
MmcHostInstance->Signature = MMC_HOST_INSTANCE_SIGNATURE;
MmcHostInstance->State = MmcHwInitializationState;
MmcHostInstance->BlockIo.Media = AllocateCopyPool (sizeof (EFI_BLOCK_IO_MEDIA), &mMmcMediaTemplate);
if (MmcHostInstance->BlockIo.Media == NULL) {
goto FREE_INSTANCE;
}
MmcHostInstance->BlockIo.Revision = EFI_BLOCK_IO_INTERFACE_REVISION;
MmcHostInstance->BlockIo.Reset = MmcReset;
MmcHostInstance->BlockIo.ReadBlocks = MmcReadBlocks;
MmcHostInstance->BlockIo.WriteBlocks = MmcWriteBlocks;
MmcHostInstance->BlockIo.FlushBlocks = MmcFlushBlocks;
MmcHostInstance->MmcHost = MmcHost;
// Create DevicePath for the new MMC Host
Status = MmcHost->BuildDevicePath (MmcHost, &NewDevicePathNode);
if (EFI_ERROR (Status)) {
goto FREE_MEDIA;
}
DevicePath = (EFI_DEVICE_PATH_PROTOCOL *)AllocatePool (END_DEVICE_PATH_LENGTH);
if (DevicePath == NULL) {
goto FREE_MEDIA;
}
SetDevicePathEndNode (DevicePath);
MmcHostInstance->DevicePath = AppendDevicePathNode (DevicePath, NewDevicePathNode);
// Publish BlockIO protocol interface
Status = gBS->InstallMultipleProtocolInterfaces (
&MmcHostInstance->MmcHandle,
&gEfiBlockIoProtocolGuid,
&MmcHostInstance->BlockIo,
&gEfiDevicePathProtocolGuid,
MmcHostInstance->DevicePath,
NULL
);
if (EFI_ERROR (Status)) {
goto FREE_DEVICE_PATH;
}
return MmcHostInstance;
FREE_DEVICE_PATH:
FreePool (DevicePath);
FREE_MEDIA:
FreePool (MmcHostInstance->BlockIo.Media);
FREE_INSTANCE:
FreePool (MmcHostInstance);
return NULL;
}
EFI_STATUS
DestroyMmcHostInstance (
IN MMC_HOST_INSTANCE *MmcHostInstance
)
{
EFI_STATUS Status;
// Uninstall Protocol Interfaces
Status = gBS->UninstallMultipleProtocolInterfaces (
MmcHostInstance->MmcHandle,
&gEfiBlockIoProtocolGuid,
&(MmcHostInstance->BlockIo),
&gEfiDevicePathProtocolGuid,
MmcHostInstance->DevicePath,
NULL
);
ASSERT_EFI_ERROR (Status);
// Free Memory allocated for the instance
if (MmcHostInstance->BlockIo.Media) {
FreePool (MmcHostInstance->BlockIo.Media);
}
if (MmcHostInstance->CardInfo.ECSDData) {
FreePages (MmcHostInstance->CardInfo.ECSDData, EFI_SIZE_TO_PAGES (sizeof (ECSD)));
}
FreePool (MmcHostInstance);
return Status;
}
/**
This function checks if the controller implement the Mmc Host and the Device Path Protocols
**/
EFI_STATUS
EFIAPI
MmcDriverBindingSupported (
IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE Controller,
IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
)
{
EFI_STATUS Status;
// EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath;
EFI_MMC_HOST_PROTOCOL *MmcHost;
EFI_DEV_PATH_PTR Node;
//
// Check RemainingDevicePath validation
//
if (RemainingDevicePath != NULL) {
//
// Check if RemainingDevicePath is the End of Device Path Node,
// if yes, go on checking other conditions
//
if (!IsDevicePathEnd (RemainingDevicePath)) {
//
// If RemainingDevicePath isn't the End of Device Path Node,
// check its validation
//
Node.DevPath = RemainingDevicePath;
if ((Node.DevPath->Type != HARDWARE_DEVICE_PATH) ||
(Node.DevPath->SubType != HW_VENDOR_DP) ||
(DevicePathNodeLength (Node.DevPath) != sizeof (VENDOR_DEVICE_PATH)))
{
return EFI_UNSUPPORTED;
}
}
}
//
// Check if Mmc Host protocol is installed by platform
//
Status = gBS->OpenProtocol (
Controller,
&gEmbeddedMmcHostProtocolGuid,
(VOID **)&MmcHost,
This->DriverBindingHandle,
Controller,
EFI_OPEN_PROTOCOL_BY_DRIVER
);
if (Status == EFI_ALREADY_STARTED) {
return EFI_SUCCESS;
}
if (EFI_ERROR (Status)) {
return Status;
}
//
// Close the Mmc Host used to perform the supported test
//
gBS->CloseProtocol (
Controller,
&gEmbeddedMmcHostProtocolGuid,
This->DriverBindingHandle,
Controller
);
return EFI_SUCCESS;
}
/**
**/
EFI_STATUS
EFIAPI
MmcDriverBindingStart (
IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE Controller,
IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
)
{
EFI_STATUS Status;
MMC_HOST_INSTANCE *MmcHostInstance;
EFI_MMC_HOST_PROTOCOL *MmcHost;
//
// Check RemainingDevicePath validation
//
if (RemainingDevicePath != NULL) {
//
// Check if RemainingDevicePath is the End of Device Path Node,
// if yes, return EFI_SUCCESS
//
if (IsDevicePathEnd (RemainingDevicePath)) {
return EFI_SUCCESS;
}
}
//
// Get the Mmc Host protocol
//
Status = gBS->OpenProtocol (
Controller,
&gEmbeddedMmcHostProtocolGuid,
(VOID **)&MmcHost,
This->DriverBindingHandle,
Controller,
EFI_OPEN_PROTOCOL_BY_DRIVER
);
if (EFI_ERROR (Status)) {
if (Status == EFI_ALREADY_STARTED) {
return EFI_SUCCESS;
}
return Status;
}
MmcHostInstance = CreateMmcHostInstance (MmcHost);
if (MmcHostInstance != NULL) {
// Add the handle to the pool
InsertMmcHost (MmcHostInstance);
MmcHostInstance->Initialized = FALSE;
// Detect card presence now
CheckCardsCallback (NULL, NULL);
}
return EFI_SUCCESS;
}
/**
**/
EFI_STATUS
EFIAPI
MmcDriverBindingStop (
IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE Controller,
IN UINTN NumberOfChildren,
IN EFI_HANDLE *ChildHandleBuffer
)
{
EFI_STATUS Status = EFI_SUCCESS;
LIST_ENTRY *CurrentLink;
MMC_HOST_INSTANCE *MmcHostInstance;
MMC_TRACE ("MmcDriverBindingStop()");
// For each MMC instance
CurrentLink = mMmcHostPool.ForwardLink;
while (CurrentLink != NULL && CurrentLink != &mMmcHostPool && (Status == EFI_SUCCESS)) {
MmcHostInstance = MMC_HOST_INSTANCE_FROM_LINK (CurrentLink);
ASSERT (MmcHostInstance != NULL);
// Close gEmbeddedMmcHostProtocolGuid
Status = gBS->CloseProtocol (
Controller,
&gEmbeddedMmcHostProtocolGuid,
This->DriverBindingHandle,
Controller
);
// Remove MMC Host Instance from the pool
RemoveMmcHost (MmcHostInstance);
// Destroy MmcHostInstance
DestroyMmcHostInstance (MmcHostInstance);
}
return Status;
}
VOID
EFIAPI
CheckCardsCallback (
IN EFI_EVENT Event,
IN VOID *Context
)
{
LIST_ENTRY *CurrentLink;
MMC_HOST_INSTANCE *MmcHostInstance;
EFI_STATUS Status;
CurrentLink = mMmcHostPool.ForwardLink;
while (CurrentLink != NULL && CurrentLink != &mMmcHostPool) {
MmcHostInstance = MMC_HOST_INSTANCE_FROM_LINK (CurrentLink);
ASSERT (MmcHostInstance != NULL);
if (MmcHostInstance->MmcHost->IsCardPresent (MmcHostInstance->MmcHost) == !MmcHostInstance->Initialized) {
MmcHostInstance->State = MmcHwInitializationState;
MmcHostInstance->BlockIo.Media->MediaPresent = !MmcHostInstance->Initialized;
MmcHostInstance->Initialized = !MmcHostInstance->Initialized;
if (MmcHostInstance->BlockIo.Media->MediaPresent) {
InitializeMmcDevice (MmcHostInstance);
}
Status = gBS->ReinstallProtocolInterface (
(MmcHostInstance->MmcHandle),
&gEfiBlockIoProtocolGuid,
&(MmcHostInstance->BlockIo),
&(MmcHostInstance->BlockIo)
);
if (EFI_ERROR (Status)) {
Print (L"MMC Card: Error reinstalling BlockIo interface\n");
}
}
CurrentLink = CurrentLink->ForwardLink;
}
}
EFI_DRIVER_BINDING_PROTOCOL gMmcDriverBinding = {
MmcDriverBindingSupported,
MmcDriverBindingStart,
MmcDriverBindingStop,
0xa,
NULL,
NULL
};
/**
**/
EFI_STATUS
EFIAPI
MmcDxeInitialize (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
//
// Initializes MMC Host pool
//
InitializeMmcHostPool ();
//
// Install driver model protocol(s).
//
Status = EfiLibInstallDriverBindingComponentName2 (
ImageHandle,
SystemTable,
&gMmcDriverBinding,
ImageHandle,
&gMmcComponentName,
&gMmcComponentName2
);
ASSERT_EFI_ERROR (Status);
// Install driver diagnostics
Status = gBS->InstallMultipleProtocolInterfaces (
&ImageHandle,
&gEfiDriverDiagnostics2ProtocolGuid,
&gMmcDriverDiagnostics2,
NULL
);
ASSERT_EFI_ERROR (Status);
// Use a timer to detect if a card has been plugged in or removed
Status = gBS->CreateEvent (
EVT_NOTIFY_SIGNAL | EVT_TIMER,
TPL_CALLBACK,
CheckCardsCallback,
NULL,
&gCheckCardsEvent
);
ASSERT_EFI_ERROR (Status);
Status = gBS->SetTimer (
gCheckCardsEvent,
TimerPeriodic,
(UINT64)(10*1000*200)
); // 200 ms
ASSERT_EFI_ERROR (Status);
return Status;
}
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