[edk2-devel] [PATCH 1/1] MdeModulePkg: UART Dynamic clock freq Support
Leif Lindholm
leif at nuviainc.com
Thu Mar 19 15:30:57 UTC 2020
Hi Ray,
I agree it would be nice, but if not - this lets us get rid of
otherwise needless driver duplication. To me, that makes it worth a
little trivial churn.
/
Leif
On Thu, Mar 19, 2020 at 15:09:19 +0000, Ni, Ray wrote:
> It seems this change requires all platforms DSC to include the new library class/instance.
>
> Is there a way that can avoid the platform impact?
>
> Thanks,
> Ray
>
> > -----Original Message-----
> > From: Pankaj Bansal <pankaj.bansal at oss.nxp.com>
> > Sent: Wednesday, February 19, 2020 9:32 PM
> > To: Wang, Jian J <jian.j.wang at intel.com>; Wu, Hao A <hao.a.wu at intel.com>; Ni, Ray <ray.ni at intel.com>; Ma, Maurice
> > <maurice.ma at intel.com>; Dong, Guo <guo.dong at intel.com>; You, Benjamin <benjamin.you at intel.com>; Leif Lindholm
> > <leif at nuviainc.com>; Meenakshi Aggarwal <meenakshi.aggarwal at nxp.com>; Varun Sethi <V.Sethi at nxp.com>
> > Cc: devel at edk2.groups.io; Pankaj Bansal <pankaj.bansal at nxp.com>
> > Subject: [PATCH 1/1] MdeModulePkg: UART Dynamic clock freq Support
> >
> > From: Pankaj Bansal <pankaj.bansal at nxp.com>
> >
> > Some platform support dynamic clocking, which is controlled by some
> > jumper setting or hardware registers. Result of that is that PCD
> > PcdSerialClockRate would need to be updated for frequency change.
> >
> > This patch implements support for dynamic frequency for Uart.
> >
> > This patch implements default lib, which is using Pcd. Platform which
> > needs dynamic clocking needs implement SerialUartClockLib
> >
> > This patch is based on ArmPlatformPkg/Library/PL011UartClockLib
> >
> > Signed-off-by: Pankaj Bansal <pankaj.bansal at nxp.com>
> > ---
> > .../Include/Library/SerialUartClockLib.h | 21 +++++++++++++++
> > .../BaseSerialPortLib16550.c | 9 ++++---
> > .../BaseSerialPortLib16550.inf | 2 +-
> > .../BaseSerialUartClockLib.c | 24 +++++++++++++++++
> > .../BaseSerialUartClockLib.inf | 27 +++++++++++++++++++
> > MdeModulePkg/MdeModulePkg.dsc | 2 ++
> > SourceLevelDebugPkg/SourceLevelDebugPkg.dsc | 1 +
> > UefiPayloadPkg/UefiPayloadPkgIa32.dsc | 1 +
> > UefiPayloadPkg/UefiPayloadPkgIa32X64.dsc | 1 +
> > 9 files changed, 83 insertions(+), 5 deletions(-)
> > create mode 100644 MdeModulePkg/Include/Library/SerialUartClockLib.h
> > create mode 100644 MdeModulePkg/Library/BaseSerialUartClockLib/BaseSerialUartClockLib.c
> > create mode 100644 MdeModulePkg/Library/BaseSerialUartClockLib/BaseSerialUartClockLib.inf
> >
> > diff --git a/MdeModulePkg/Include/Library/SerialUartClockLib.h b/MdeModulePkg/Include/Library/SerialUartClockLib.h
> > new file mode 100644
> > index 000000000000..b6b16f71d4cf
> > --- /dev/null
> > +++ b/MdeModulePkg/Include/Library/SerialUartClockLib.h
> > @@ -0,0 +1,21 @@
> > +/** @file
> > +*
> > +* Copyright 2020 NXP
> > +*
> > +* SPDX-License-Identifier: BSD-2-Clause-Patent
> > +*
> > +**/
> > +
> > +#ifndef SERIAL_UART_CLOCK_LIB_H__
> > +#define SERIAL_UART_CLOCK_LIB_H__
> > +
> > +/**
> > + Return clock in for Uart IP
> > +**/
> > +UINT32
> > +EFIAPI
> > +BaseSerialPortGetClock (
> > + VOID
> > + );
> > +
> > +#endif
> > diff --git a/MdeModulePkg/Library/BaseSerialPortLib16550/BaseSerialPortLib16550.c
> > b/MdeModulePkg/Library/BaseSerialPortLib16550/BaseSerialPortLib16550.c
> > index 9cb50dd80d56..2e0c05d5789e 100644
> > --- a/MdeModulePkg/Library/BaseSerialPortLib16550/BaseSerialPortLib16550.c
> > +++ b/MdeModulePkg/Library/BaseSerialPortLib16550/BaseSerialPortLib16550.c
> > @@ -16,6 +16,7 @@
> > #include <Library/IoLib.h>
> > #include <Library/PciLib.h>
> > #include <Library/PlatformHookLib.h>
> > +#include <Library/SerialUartClockLib.h>
> > #include <Library/BaseLib.h>
> >
> > //
> > @@ -501,8 +502,8 @@ SerialPortInitialize (
> > // Calculate divisor for baud generator
> > // Ref_Clk_Rate / Baud_Rate / 16
> > //
> > - Divisor = PcdGet32 (PcdSerialClockRate) / (PcdGet32 (PcdSerialBaudRate) * 16);
> > - if ((PcdGet32 (PcdSerialClockRate) % (PcdGet32 (PcdSerialBaudRate) * 16)) >= PcdGet32 (PcdSerialBaudRate) * 8) {
> > + Divisor = BaseSerialPortGetClock () / (PcdGet32 (PcdSerialBaudRate) * 16);
> > + if ((BaseSerialPortGetClock () % (PcdGet32 (PcdSerialBaudRate) * 16)) >= PcdGet32 (PcdSerialBaudRate) * 8) {
> > Divisor++;
> > }
> >
> > @@ -1080,8 +1081,8 @@ SerialPortSetAttributes (
> > // Calculate divisor for baud generator
> > // Ref_Clk_Rate / Baud_Rate / 16
> > //
> > - Divisor = PcdGet32 (PcdSerialClockRate) / (SerialBaudRate * 16);
> > - if ((PcdGet32 (PcdSerialClockRate) % (SerialBaudRate * 16)) >= SerialBaudRate * 8) {
> > + Divisor = BaseSerialPortGetClock () / (SerialBaudRate * 16);
> > + if ((BaseSerialPortGetClock () % (SerialBaudRate * 16)) >= SerialBaudRate * 8) {
> > Divisor++;
> > }
> >
> > diff --git a/MdeModulePkg/Library/BaseSerialPortLib16550/BaseSerialPortLib16550.inf
> > b/MdeModulePkg/Library/BaseSerialPortLib16550/BaseSerialPortLib16550.inf
> > index 8b4ae3f1d4ee..b4c16504f211 100644
> > --- a/MdeModulePkg/Library/BaseSerialPortLib16550/BaseSerialPortLib16550.inf
> > +++ b/MdeModulePkg/Library/BaseSerialPortLib16550/BaseSerialPortLib16550.inf
> > @@ -24,6 +24,7 @@ [LibraryClasses]
> > IoLib
> > PlatformHookLib
> > PciLib
> > + SerialUartClockLib
> >
> > [Sources]
> > BaseSerialPortLib16550.c
> > @@ -37,7 +38,6 @@ [Pcd]
> > gEfiMdeModulePkgTokenSpaceGuid.PcdSerialBaudRate ## CONSUMES
> > gEfiMdeModulePkgTokenSpaceGuid.PcdSerialLineControl ## CONSUMES
> > gEfiMdeModulePkgTokenSpaceGuid.PcdSerialFifoControl ## CONSUMES
> > - gEfiMdeModulePkgTokenSpaceGuid.PcdSerialClockRate ## CONSUMES
> > gEfiMdeModulePkgTokenSpaceGuid.PcdSerialPciDeviceInfo ## CONSUMES
> > gEfiMdeModulePkgTokenSpaceGuid.PcdSerialExtendedTxFifoSize ## CONSUMES
> > gEfiMdeModulePkgTokenSpaceGuid.PcdSerialRegisterStride ## CONSUMES
> > diff --git a/MdeModulePkg/Library/BaseSerialUartClockLib/BaseSerialUartClockLib.c
> > b/MdeModulePkg/Library/BaseSerialUartClockLib/BaseSerialUartClockLib.c
> > new file mode 100644
> > index 000000000000..7a0d0427cc4e
> > --- /dev/null
> > +++ b/MdeModulePkg/Library/BaseSerialUartClockLib/BaseSerialUartClockLib.c
> > @@ -0,0 +1,24 @@
> > +/** @file
> > +*
> > +* Copyright 2020 NXP
> > +*
> > +* SPDX-License-Identifier: BSD-2-Clause-Patent
> > +*
> > +**/
> > +
> > +#include <Base.h>
> > +#include <Library/PcdLib.h>
> > +
> > +/**
> > + Return clock in for Uart IP
> > +
> > + @return Pcd PcdSerialClockRate
> > +**/
> > +UINT32
> > +EFIAPI
> > +BaseSerialPortGetClock (
> > + VOID
> > + )
> > +{
> > + return PcdGet32 (PcdSerialClockRate);
> > +}
> > diff --git a/MdeModulePkg/Library/BaseSerialUartClockLib/BaseSerialUartClockLib.inf
> > b/MdeModulePkg/Library/BaseSerialUartClockLib/BaseSerialUartClockLib.inf
> > new file mode 100644
> > index 000000000000..91ba69436ed6
> > --- /dev/null
> > +++ b/MdeModulePkg/Library/BaseSerialUartClockLib/BaseSerialUartClockLib.inf
> > @@ -0,0 +1,27 @@
> > +#/* @file
> > +# Copyright 2020 NXP
> > +#
> > +# SPDX-License-Identifier: BSD-2-Clause-Patent
> > +#
> > +#*/
> > +
> > +[Defines]
> > + INF_VERSION = 0x0001001A
> > + BASE_NAME = BaseSerialUartClockLib
> > + FILE_GUID = fa65495e-d3c8-4ea3-9737-994e9ccbaf11
> > + MODULE_TYPE = BASE
> > + VERSION_STRING = 1.0
> > + LIBRARY_CLASS = SerialUartClockLib
> > +
> > +[Packages]
> > + MdePkg/MdePkg.dec
> > + MdeModulePkg/MdeModulePkg.dec
> > +
> > +[Sources.common]
> > + BaseSerialUartClockLib.c
> > +
> > +[LibraryClasses]
> > + PcdLib
> > +
> > +[Pcd]
> > + gEfiMdeModulePkgTokenSpaceGuid.PcdSerialClockRate ## CONSUMES
> > diff --git a/MdeModulePkg/MdeModulePkg.dsc b/MdeModulePkg/MdeModulePkg.dsc
> > index f7dbb27ce25d..d581ca797b3b 100644
> > --- a/MdeModulePkg/MdeModulePkg.dsc
> > +++ b/MdeModulePkg/MdeModulePkg.dsc
> > @@ -65,6 +65,7 @@ [LibraryClasses]
> > UefiScsiLib|MdePkg/Library/UefiScsiLib/UefiScsiLib.inf
> > SecurityManagementLib|MdeModulePkg/Library/DxeSecurityManagementLib/DxeSecurityManagementLib.inf
> > TimerLib|MdePkg/Library/BaseTimerLibNullTemplate/BaseTimerLibNullTemplate.inf
> > + SerialUartClockLib|MdeModulePkg/Library/BaseSerialUartClockLib/BaseSerialUartClockLib.inf
> > SerialPortLib|MdePkg/Library/BaseSerialPortLibNull/BaseSerialPortLibNull.inf
> > CapsuleLib|MdeModulePkg/Library/DxeCapsuleLibNull/DxeCapsuleLibNull.inf
> > PcdLib|MdePkg/Library/BasePcdLibNull/BasePcdLibNull.inf
> > @@ -292,6 +293,7 @@ [Components]
> > MdeModulePkg/Library/DxeReportStatusCodeLib/DxeReportStatusCodeLib.inf
> > MdeModulePkg/Library/RuntimeDxeReportStatusCodeLib/RuntimeDxeReportStatusCodeLib.inf
> > MdeModulePkg/Library/RuntimeResetSystemLib/RuntimeResetSystemLib.inf
> > + MdeModulePkg/Library/BaseSerialUartClockLib/BaseSerialUartClockLib.inf
> > MdeModulePkg/Library/BaseSerialPortLib16550/BaseSerialPortLib16550.inf
> > MdeModulePkg/Library/BasePlatformHookLibNull/BasePlatformHookLibNull.inf
> > MdeModulePkg/Library/DxeDebugPrintErrorLevelLib/DxeDebugPrintErrorLevelLib.inf
> > diff --git a/SourceLevelDebugPkg/SourceLevelDebugPkg.dsc b/SourceLevelDebugPkg/SourceLevelDebugPkg.dsc
> > index a1a1b81d03cb..c0ad88f26341 100644
> > --- a/SourceLevelDebugPkg/SourceLevelDebugPkg.dsc
> > +++ b/SourceLevelDebugPkg/SourceLevelDebugPkg.dsc
> > @@ -33,6 +33,7 @@ [LibraryClasses.common]
> > SynchronizationLib|MdePkg/Library/BaseSynchronizationLib/BaseSynchronizationLib.inf
> > LocalApicLib|UefiCpuPkg/Library/BaseXApicLib/BaseXApicLib.inf
> > PeCoffGetEntryPointLib|MdePkg/Library/BasePeCoffGetEntryPointLib/BasePeCoffGetEntryPointLib.inf
> > + SerialUartClockLib|MdeModulePkg/Library/BaseSerialUartClockLib/BaseSerialUartClockLib.inf
> > SerialPortLib|MdeModulePkg/Library/BaseSerialPortLib16550/BaseSerialPortLib16550.inf
> > PeCoffExtraActionLib|SourceLevelDebugPkg/Library/PeCoffExtraActionLibDebug/PeCoffExtraActionLibDebug.inf
> > TimerLib|UefiCpuPkg/Library/SecPeiDxeTimerLibUefiCpu/SecPeiDxeTimerLibUefiCpu.inf
> > diff --git a/UefiPayloadPkg/UefiPayloadPkgIa32.dsc b/UefiPayloadPkg/UefiPayloadPkgIa32.dsc
> > index d52945442e0e..a556a32b272c 100644
> > --- a/UefiPayloadPkg/UefiPayloadPkgIa32.dsc
> > +++ b/UefiPayloadPkg/UefiPayloadPkgIa32.dsc
> > @@ -174,6 +174,7 @@ [LibraryClasses]
> > #
> > TimerLib|UefiPayloadPkg/Library/AcpiTimerLib/AcpiTimerLib.inf
> > ResetSystemLib|UefiPayloadPkg/Library/ResetSystemLib/ResetSystemLib.inf
> > + SerialUartClockLib|MdeModulePkg/Library/BaseSerialUartClockLib/BaseSerialUartClockLib.inf
> > SerialPortLib|MdeModulePkg/Library/BaseSerialPortLib16550/BaseSerialPortLib16550.inf
> > PlatformHookLib|UefiPayloadPkg/Library/PlatformHookLib/PlatformHookLib.inf
> > PlatformBootManagerLib|UefiPayloadPkg/Library/PlatformBootManagerLib/PlatformBootManagerLib.inf
> > diff --git a/UefiPayloadPkg/UefiPayloadPkgIa32X64.dsc b/UefiPayloadPkg/UefiPayloadPkgIa32X64.dsc
> > index 0736cd995476..7e86375fe57d 100644
> > --- a/UefiPayloadPkg/UefiPayloadPkgIa32X64.dsc
> > +++ b/UefiPayloadPkg/UefiPayloadPkgIa32X64.dsc
> > @@ -175,6 +175,7 @@ [LibraryClasses]
> > #
> > TimerLib|UefiPayloadPkg/Library/AcpiTimerLib/AcpiTimerLib.inf
> > ResetSystemLib|UefiPayloadPkg/Library/ResetSystemLib/ResetSystemLib.inf
> > + SerialUartClockLib|MdeModulePkg/Library/BaseSerialUartClockLib/BaseSerialUartClockLib.inf
> > SerialPortLib|MdeModulePkg/Library/BaseSerialPortLib16550/BaseSerialPortLib16550.inf
> > PlatformHookLib|UefiPayloadPkg/Library/PlatformHookLib/PlatformHookLib.inf
> > PlatformBootManagerLib|UefiPayloadPkg/Library/PlatformBootManagerLib/PlatformBootManagerLib.inf
> > --
> > 2.17.1
>
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