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[PATCH v2] MdeModulePkg: Enabling OS boot from SD card through UEFI payload
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Aiman Rosli
This changes is by adding 50ms delay during voltage switching from 3.3V to 1.8V,
plus adding a goto Voltage33Retry for 3.3V checking and retrying. Signed-off-by: Aiman Rosli <muhammad.aiman.rosli@...> --- MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdDevice.c | 23 ++++++++++++++++--- 1 file changed, 20 insertions(+), 3 deletions(-) diff --git a/MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdDevice.c b/MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdDevice.c index 662f9f483c..527fe7dc20 100644 --- a/MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdDevice.c +++ b/MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdDevice.c @@ -1213,9 +1213,14 @@ SdCardIdentification ( UINT32 PresentState; UINT8 HostCtrl2; UINTN Retry; + BOOLEAN ForceVoltage33; + + ForceVoltage33 = FALSE; PciIo = Private->PciIo; PassThru = &Private->PassThru; + +Voltage33Retry: // // 1. Send Cmd0 to the device // @@ -1294,6 +1299,14 @@ SdCardIdentification ( return EFI_UNSUPPORTED; } + // + // 1.8V had failed in the previous run, forcing a retry with 3.3V instead + // + if (ForceVoltage33 == TRUE) { + S18r = FALSE; + ForceVoltage33 = FALSE; + } + // // 5. Repeatly send Acmd41 with supply voltage window to the device. // Note here we only support the cards complied with SD physical @@ -1362,13 +1375,17 @@ SdCardIdentification ( goto Error; } - gBS->Stall (1000); + // Workaround to add a delay of 50 ms in order for clock to stabilize before turning on the SD card again. + gBS->Stall (50000); SdMmcHcRwMmio (PciIo, Slot, SD_MMC_HC_PRESENT_STATE, TRUE, sizeof (PresentState), &PresentState); if (((PresentState >> 20) & 0xF) != 0xF) { DEBUG ((DEBUG_ERROR, "SdCardIdentification: SwitchVoltage fails with PresentState = 0x%x, It should be 0xF\n", PresentState)); - Status = EFI_DEVICE_ERROR; - goto Error; + Status = SdMmcHcReset (Private, Slot); + Status = SdMmcHcInitHost (Private, Slot); + ForceVoltage33 = TRUE; + DEBUG ((DEBUG_ERROR, "SdCardIdentification: Switching to 1.8V had failed in the previous run, forcing a retry with 3.3V instead\n")); + goto Voltage33Retry; } } -- 2.34.1.windows.1
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Wu, Hao A
Please refer to the inline comments below:
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-----Original Message----- Like I mentioned in https://github.com/tianocore/edk2/pull/2413#discussion_r785611042 I do not think "ForceVoltage33 = FALSE" is necessary, could you help to double check? + } Sorry for a question. As I mentioned in: https://github.com/tianocore/edk2/pull/2413#discussion_r785610179 https://github.com/tianocore/edk2/pull/2413#discussion_r785610742 Can this 50 milliseconds delay be put in the below 1.8V switch failure handling logic? Enlarging the delay (from 1ms to 50ms) in the normal initialization flow will bring performance impact.
Could you help to check my comment in: https://github.com/tianocore/edk2/pull/2413#discussion_r785610742 to 1) add comments and 2) refine the error handling for the "reset and reinitialize the slot before the 3.3V retry" Best Regards, Hao Wu + ForceVoltage33 = TRUE;
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Aiman Rosli
Hi all,
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Please review my patch, if there is no issue, can help to add push label. Thank you. Regards, Aiman Rosli
-----Original Message-----
From: devel@edk2.groups.io <devel@edk2.groups.io> On Behalf Of Aiman Rosli Sent: Monday, 17 January, 2022 8:56 PM To: devel@edk2.groups.io Cc: Rosli, Muhammad Aiman <muhammad.aiman.rosli@...> Subject: [edk2-devel] [PATCH v2] MdeModulePkg: Enabling OS boot from SD card through UEFI payload This changes is by adding 50ms delay during voltage switching from 3.3V to 1.8V, plus adding a goto Voltage33Retry for 3.3V checking and retrying. Signed-off-by: Aiman Rosli <muhammad.aiman.rosli@...> --- MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdDevice.c | 23 ++++++++++++++++--- 1 file changed, 20 insertions(+), 3 deletions(-) diff --git a/MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdDevice.c b/MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdDevice.c index 662f9f483c..527fe7dc20 100644 --- a/MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdDevice.c +++ b/MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdDevice.c @@ -1213,9 +1213,14 @@ SdCardIdentification ( UINT32 PresentState; UINT8 HostCtrl2; UINTN Retry; + BOOLEAN ForceVoltage33; + + ForceVoltage33 = FALSE; PciIo = Private->PciIo; PassThru = &Private->PassThru; + +Voltage33Retry: // // 1. Send Cmd0 to the device // @@ -1294,6 +1299,14 @@ SdCardIdentification ( return EFI_UNSUPPORTED; } + // + // 1.8V had failed in the previous run, forcing a retry with 3.3V + instead // if (ForceVoltage33 == TRUE) { + S18r = FALSE; + ForceVoltage33 = FALSE; + } + // // 5. Repeatly send Acmd41 with supply voltage window to the device. // Note here we only support the cards complied with SD physical @@ -1362,13 +1375,17 @@ SdCardIdentification ( goto Error; } - gBS->Stall (1000); + // Workaround to add a delay of 50 ms in order for clock to stabilize before turning on the SD card again. + gBS->Stall (50000); SdMmcHcRwMmio (PciIo, Slot, SD_MMC_HC_PRESENT_STATE, TRUE, sizeof (PresentState), &PresentState); if (((PresentState >> 20) & 0xF) != 0xF) { DEBUG ((DEBUG_ERROR, "SdCardIdentification: SwitchVoltage fails with PresentState = 0x%x, It should be 0xF\n", PresentState)); - Status = EFI_DEVICE_ERROR; - goto Error; + Status = SdMmcHcReset (Private, Slot); + Status = SdMmcHcInitHost (Private, Slot); + ForceVoltage33 = TRUE; + DEBUG ((DEBUG_ERROR, "SdCardIdentification: Switching to 1.8V had failed in the previous run, forcing a retry with 3.3V instead\n")); + goto Voltage33Retry; } } -- 2.34.1.windows.1
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Wu, Hao A
Hello Aiman Rosli,
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I have provided my feedbacks by replying your patch mail. Please help to check if you received the mail. Or you can check the feedbacks at: https://edk2.groups.io/g/devel/message/85764 Best Regards, Hao Wu
-----Original Message-----
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