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EmbeddedPkg/MmcDxe: Ensure MMC is in Identification Mode 

This change ensure the MMC card is in Identification Mode.
The card might be in Data Transfer Mode if a pre UEFI Boot Loader
had initialized the card.
A potential optimization would be to skip the Identification Mode
in this case.

Signed-off-by: Olivier Martin <olivier.martin@arm.com>



git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@13872 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
oliviermartin 2012-10-19 09:47:49 +00:00
parent f52be04a2f
commit fc78c48e20
1 changed files with 6 additions and 7 deletions
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5
EmbeddedPkg/Universal/MmcDxe/MmcBlockIo.c
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@ -215,14 +215,13 @@ MmcIdentificationMode (
DEBUG((EFI_D_ERROR, "MmcIdentificationMode() : Error MmcHwInitializationState\n"));
return Status;
}
} else {
//Note: Could even be used in all cases. But it looks this command could put the state machine into inactive for some cards
}
Status = MmcHost->SendCommand (MmcHost, MMC_CMD0, 0);
if (EFI_ERROR(Status)) {
DEBUG((EFI_D_ERROR, "MmcIdentificationMode(MMC_CMD0): Error\n"));
return Status;
}
}
Status = MmcNotifyState (MmcHostInstance, MmcIdleState);
if (EFI_ERROR(Status)) {