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ArmPlatformPkg/PL180MciDxe: update for identifying SD 

When CMD6 & ACMD51 are added into identifying SD process, PL180
should also support CMD6 & ACMD51. Otherwise, it will hang when
system tries to read expected data.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Haojian Zhuang <haojian.zhuang@linaro.org>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Tested-by: Ryan Harkin <ryan.harkin@linaro.org>
This commit is contained in:
Haojian Zhuang 2016-11-23 21:36:23 +08:00 committed by Ard Biesheuvel
parent a28b9aef67
commit 1df2fe1433
1 changed files with 22 additions and 7 deletions
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27
ArmPlatformPkg/Drivers/PL180MciDxe/PL180Mci.c
View File

@ -63,11 +63,6 @@ MciIsReadOnly (
return (MmioRead32 (FixedPcdGet32 (PcdPL180SysMciRegAddress)) & SYS_MCI_WPROT);
}
#if 0
//Note: This function has been commented out because it is not used yet.
// This function could be used to remove the hardcoded BlockLen used
// in MciPrepareDataPath
// Convert block size to 2^n
STATIC
UINT32
@ -87,7 +82,6 @@ GetPow2BlockLen (
return Pow2BlockLen;
}
#endif
VOID
MciPrepareDataPath (
@ -126,6 +120,23 @@ MciSendCommand (
MciPrepareDataPath (MCI_DATACTL_CARD_TO_CONT);
} else if ((MmcCmd == MMC_CMD24) || (MmcCmd == MMC_CMD20)) {
MciPrepareDataPath (MCI_DATACTL_CONT_TO_CARD);
} else if (MmcCmd == MMC_CMD6) {
MmioWrite32 (MCI_DATA_TIMER_REG, 0xFFFFFFF);
MmioWrite32 (MCI_DATA_LENGTH_REG, 64);
#ifndef USE_STREAM
MmioWrite32 (MCI_DATA_CTL_REG, MCI_DATACTL_ENABLE | MCI_DATACTL_CARD_TO_CONT | GetPow2BlockLen (64));
#else
MmioWrite32 (MCI_DATA_CTL_REG, MCI_DATACTL_ENABLE | MCI_DATACTL_CARD_TO_CONT | MCI_DATACTL_STREAM_TRANS);
#endif
} else if (MmcCmd == MMC_ACMD51) {
MmioWrite32 (MCI_DATA_TIMER_REG, 0xFFFFFFF);
/* SCR register is 8 bytes long. */
MmioWrite32 (MCI_DATA_LENGTH_REG, 8);
#ifndef USE_STREAM
MmioWrite32 (MCI_DATA_CTL_REG, MCI_DATACTL_ENABLE | MCI_DATACTL_CARD_TO_CONT | GetPow2BlockLen (8));
#else
MmioWrite32 (MCI_DATA_CTL_REG, MCI_DATACTL_ENABLE | MCI_DATACTL_CARD_TO_CONT | MCI_DATACTL_STREAM_TRANS);
#endif
}
// Create Command for PL180
@ -223,7 +234,11 @@ MciReadBlockData (
// Read data from the RX FIFO
Loop = 0;
if (Length < MMCI0_BLOCKLEN) {
Finish = Length / 4;
} else {
Finish = MMCI0_BLOCKLEN / 4;
}
// Raise the TPL at the highest level to disable Interrupts.
Tpl = gBS->RaiseTPL (TPL_HIGH_LEVEL);