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EmbeddedPkg/MmcDxe: Create a periodic function to check if a card is present

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In the former version, the check was done for every BlockIo operation.
By using a periodical function, we check less time in consequence performance
are better.



git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12128 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
oliviermartin
2011-08-15 16:04:14 +00:00
parent 569224f9de
commit 3de99375d2
3 changed files with 87 additions and 6 deletions
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28
EmbeddedPkg/Universal/MmcDxe/MmcBlockIo.c
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@@ -369,6 +369,28 @@ MmcReset (
IN BOOLEAN ExtendedVerification
)
{
MMC_HOST_INSTANCE *MmcHostInstance;
MmcHostInstance = MMC_HOST_INSTANCE_FROM_BLOCK_IO_THIS(This);
if (MmcHostInstance->MmcHost == NULL) {
// Nothing to do
return EFI_SUCCESS;
}
// If a card is not present then clear all media settings
if (!MmcHostInstance->MmcHost->IsCardPresent()) {
MmcHostInstance->BlockIo.Media->MediaPresent = FALSE;
MmcHostInstance->BlockIo.Media->LastBlock = 0;
MmcHostInstance->BlockIo.Media->BlockSize = 512; // Should be zero but there is a bug in DiskIo
MmcHostInstance->BlockIo.Media->ReadOnly = FALSE;
// Indicate that the driver requires initialization
MmcHostInstance->State = MmcHwInitializationState;
return EFI_SUCCESS;
}
// Implement me. Either send a CMD0 (could not work for some MMC host) or just turn off/turn
// on power and restart Identification mode
return EFI_SUCCESS;
@@ -419,11 +441,7 @@ MmcIoBlocks (
}
// Check if a Card is Present
if (!MmcHost->IsCardPresent()) {
MmcHostInstance->BlockIo.Media->MediaPresent = FALSE;
MmcHostInstance->BlockIo.Media->LastBlock = 0;
MmcHostInstance->BlockIo.Media->BlockSize = 512; // Should be zero but there is a bug in DiskIo
MmcHostInstance->BlockIo.Media->ReadOnly = FALSE;
if (!MmcHostInstance->BlockIo.Media->MediaPresent) {
return EFI_NO_MEDIA;
}