From: "Aiman Rosli" <muhammad.aiman.rosli@intel.com>
To: "devel@edk2.groups.io" <devel@edk2.groups.io>,
"Wu, Hao A" <hao.a.wu@intel.com>,
"Gao, Zhichao" <zhichao.gao@intel.com>,
"Ni, Ray" <ray.ni@intel.com>,
"Wang, Jian J" <jian.j.wang@intel.com>
Subject: Re: [edk2-devel] [PATCH v2] MdeModulePkg: Enabling OS boot from SD card through UEFI payload
Date: Tue, 18 Jan 2022 16:25:40 +0000 [thread overview]
Message-ID: <DM4PR11MB54855182222819A68CB6D08CDA589@DM4PR11MB5485.namprd11.prod.outlook.com> (raw)
In-Reply-To: <16CB1013993012B3.30851@groups.io>
Hi all,
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@intel.com>
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@intel.com>
---
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
next parent reply other threads:[~2022-01-18 16:25 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <16CB1013993012B3.30851@groups.io>
2022-01-18 16:25 ` Aiman Rosli [this message]
2022-01-19 0:45 ` [edk2-devel] [PATCH v2] MdeModulePkg: Enabling OS boot from SD card through UEFI payload Wu, Hao A
2022-01-17 12:55 Aiman Rosli
2022-01-18 1:05 ` [edk2-devel] " Wu, Hao A
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-list from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=DM4PR11MB54855182222819A68CB6D08CDA589@DM4PR11MB5485.namprd11.prod.outlook.com \
--to=devel@edk2.groups.io \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox