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EmbeddedPkg/MmcDxe: Add non-DDR timing mode support 

Only DDR mode is support for 8bit mode currently. Add
non-DDR case when configuring ECSD.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jun Nie <jun.nie@linaro.org>
Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>
This commit is contained in:
Jun Nie 2017-06-12 10:18:05 +08:00 committed by Leif Lindholm
parent 03a5572bed
commit 44f4ff6257
1 changed files with 14 additions and 2 deletions
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16
EmbeddedPkg/Universal/MmcDxe/MmcIdentification.c
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@ -254,7 +254,7 @@ InitializeEmmcDevice (
EFI_MMC_HOST_PROTOCOL *Host;
EFI_STATUS Status = EFI_SUCCESS;
ECSD *ECSDData;
UINT32 BusClockFreq, Idx;
UINT32 BusClockFreq, Idx, BusMode;
UINT32 TimingMode[4] = {EMMCHS52DDR1V2, EMMCHS52DDR1V8, EMMCHS52, EMMCHS26};
Host = MmcHostInstance->MmcHost;
@ -286,7 +286,19 @@ InitializeEmmcDevice (
}
Status = Host->SetIos (Host, BusClockFreq, 8, TimingMode[Idx]);
if (!EFI_ERROR (Status)) {
Status = EmmcSetEXTCSD (MmcHostInstance, EXTCSD_BUS_WIDTH, EMMC_BUS_WIDTH_DDR_8BIT);
switch (TimingMode[Idx]) {
case EMMCHS52DDR1V2:
case EMMCHS52DDR1V8:
BusMode = EMMC_BUS_WIDTH_DDR_8BIT;
break;
case EMMCHS52:
case EMMCHS26:
BusMode = EMMC_BUS_WIDTH_8BIT;
break;
default:
return EFI_UNSUPPORTED;
}
Status = EmmcSetEXTCSD (MmcHostInstance, EXTCSD_BUS_WIDTH, BusMode);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "InitializeEmmcDevice(): Failed to set EXTCSD bus width, Status:%r\n", Status));
}