[edk2-devel] [edk2-platform][PATCH v1 1/1] ArmPlatformPkg/PL011UartLib : Fix SetControl() SCT conformance
Samer El-Haj-Mahmoud
samer.el-haj-mahmoud at arm.com
Sun Dec 20 19:22:38 UTC 2020
REF: https://github.com/pftf/RPi4/issues/87
The PL011UartLib SetControl() is failing the SCT test for
SerialIoBBTestConformance (00605CBC-3965-4B61-A254-2B2B723172EA),
which is trying to set bits that are not supported per UEFI spec.
Add proper argument check for valid bits, and confirm that test passes.
Cc: Leif Lindholm <leif at nuviainc.com>
Cc: Ard Biesheuvel <ard.biesheuvel at arm.com>
Signed-off-by: Samer El-Haj-Mahmoud <Samer.El-Haj-Mahmoud at arm.com>
---
ArmPlatformPkg/Library/PL011UartLib/PL011UartLib.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/ArmPlatformPkg/Library/PL011UartLib/PL011UartLib.c b/ArmPlatformPkg/Library/PL011UartLib/PL011UartLib.c
index 3c58a0f39acb..ec6056f5fdfd 100644
--- a/ArmPlatformPkg/Library/PL011UartLib/PL011UartLib.c
+++ b/ArmPlatformPkg/Library/PL011UartLib/PL011UartLib.c
@@ -269,6 +269,21 @@ PL011UartSetControl (
{
UINT32 Bits;
+
+ //
+ // Per UEFI spec, the control bits that can be set are :
+ // EFI_SERIAL_DATA_TERMINAL_READY
+ // EFI_SERIAL_REQUEST_TO_SEND
+ // EFI_SERIAL_HARDWARE_LOOPBACK_ENABLE
+ // EFI_SERIAL_SOFTWARE_LOOPBACK_ENABLE
+ // EFI_SERIAL_HARDWARE_FLOW_CONTROL_ENABLE
+ //
+ if ((Control & (~(EFI_SERIAL_REQUEST_TO_SEND | EFI_SERIAL_DATA_TERMINAL_READY |
+ EFI_SERIAL_HARDWARE_LOOPBACK_ENABLE | EFI_SERIAL_SOFTWARE_LOOPBACK_ENABLE |
+ EFI_SERIAL_HARDWARE_FLOW_CONTROL_ENABLE))) != 0) {
+ return EFI_UNSUPPORTED;
+ }
+
if ((Control & mInvalidControlBits) != 0) {
return RETURN_UNSUPPORTED;
}
--
2.25.1
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