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MdeModulePkg/Sd: update the sd detection logic 

If there is no card presented before power on, there would
have no card change interrupt generated. This is a corner
case which can't be handled by old logic.

The patch is used to move card present detection in the front
of card change interrupt detection.

Cc: Hao Wu <hao.a.wu@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Feng Tian <feng.tian@intel.com>
Reviewed-by: Hao Wu <hao.a.wu@intel.com>
This commit is contained in:
Feng Tian 2016-04-07 16:28:56 +08:00
parent b9953b6506
commit 2e9107b87e
2 changed files with 18 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHcDxe.c
View File

@ -4,7 +4,7 @@
It would expose EFI_SD_MMC_PASS_THRU_PROTOCOL for upper layer use.
Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2015 - 2016, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
@ -613,7 +613,9 @@ SdMmcPciHcDriverBindingStart (
// Check whether there is a SD/MMC card attached
//
Status = SdMmcHcCardDetect (PciIo, Slot, &MediaPresent);
if ((Status == EFI_MEDIA_CHANGED) && (MediaPresent == FALSE)) {
if (EFI_ERROR (Status) && (Status != EFI_MEDIA_CHANGED)) {
continue;
} else if (MediaPresent == FALSE) {
DEBUG ((EFI_D_ERROR, "SdMmcHcCardDetect: No device attached in Slot[%d]!!!\n", Slot));
continue;
}

27
MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHci.c
View File

@ -583,6 +583,20 @@ SdMmcHcCardDetect (
UINT16 Data;
UINT32 PresentState;
//
// Check Present State Register to see if there is a card presented.
//
Status = SdMmcHcRwMmio (PciIo, Slot, SD_MMC_HC_PRESENT_STATE, TRUE, sizeof (PresentState), &PresentState);
if (EFI_ERROR (Status)) {
return Status;
}
if ((PresentState & BIT16) != 0) {
*MediaPresent = TRUE;
} else {
*MediaPresent = FALSE;
}
//
// Check Normal Interrupt Status Register
//
@ -601,19 +615,6 @@ SdMmcHcCardDetect (
return Status;
}
//
// Check Present State Register to see if there is a card presented.
//
Status = SdMmcHcRwMmio (PciIo, Slot, SD_MMC_HC_PRESENT_STATE, TRUE, sizeof (PresentState), &PresentState);
if (EFI_ERROR (Status)) {
return Status;
}
if ((PresentState & BIT16) != 0) {
*MediaPresent = TRUE;
} else {
*MediaPresent = FALSE;
}
return EFI_MEDIA_CHANGED;
}