Now that we have a generic Bcm I2C driver lets instantiate one
against a possible RTC hat on the pi4.
Signed-off-by: Jeremy Linton <jeremy.lin...@arm.com>
---
.../Drivers/BcmI2CPlatform/BcmI2CPlatform.c | 127 ++++++++++++++++++
.../Drivers/BcmI2CPlatform/BcmI2CPlatform.inf | 54 ++++++++
2 files changed, 181 insertions(+)
create mode 100644 Platform/RaspberryPi/Drivers/BcmI2CPlatform/BcmI2CPlatform.c
create mode 100644
Platform/RaspberryPi/Drivers/BcmI2CPlatform/BcmI2CPlatform.inf
diff --git a/Platform/RaspberryPi/Drivers/BcmI2CPlatform/BcmI2CPlatform.c
b/Platform/RaspberryPi/Drivers/BcmI2CPlatform/BcmI2CPlatform.c
new file mode 100644
index 0000000000..11f927b848
--- /dev/null
+++ b/Platform/RaspberryPi/Drivers/BcmI2CPlatform/BcmI2CPlatform.c
@@ -0,0 +1,127 @@
+/** @file
+ Brcm/Rpi I2C DXE platform driver.
+
+ Copyright 2018-2020 NXP
+ Sourced and reworked from edk2/NXP I2C stack
+ Copyright 2022 Arm, Jeremy Linton
+
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+ This thing binds a I2C driver to a RTC..
+
+**/
+
+#include <Library/BaseLib.h>
+#include <Library/BaseMemoryLib.h>
+#include <Library/DebugLib.h>
+#include <Library/MemoryAllocationLib.h>
+#include <Library/PcdLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+#include <Library/UefiLib.h>
+#include <IndustryStandard/Bcm2836.h>
+
+#include <Protocol/NonDiscoverableDevice.h>
+
+typedef struct {
+ EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR StartDesc;
+ UINT8 EndDesc;
+} ADDRESS_SPACE_DESCRIPTOR;
+
+#define BCM_I2C_NUM_CONTROLLERS 1 //actually 6 on the bcm2711, hack for now
+
+STATIC ADDRESS_SPACE_DESCRIPTOR mI2cDesc[BCM_I2C_NUM_CONTROLLERS];
+
+STATIC
+EFI_STATUS
+RegisterDevice (
+ IN EFI_GUID *TypeGuid,
+ IN ADDRESS_SPACE_DESCRIPTOR *Desc,
+ OUT EFI_HANDLE *Handle
+ )
+{
+ NON_DISCOVERABLE_DEVICE *Device;
+ EFI_STATUS Status;
+
+ Device = (NON_DISCOVERABLE_DEVICE *)AllocateZeroPool (sizeof (*Device));
+ if (Device == NULL) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+
+ Device->Type = TypeGuid;
+ Device->DmaType = NonDiscoverableDeviceDmaTypeNonCoherent;
+ Device->Resources = (EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR *)Desc;
+
+ Status = gBS->InstallMultipleProtocolInterfaces (Handle,
+ &gEdkiiNonDiscoverableDeviceProtocolGuid, Device,
+ NULL);
+ if (EFI_ERROR (Status)) {
+ goto FreeDevice;
+ }
+ return EFI_SUCCESS;
+
+FreeDevice:
+ FreePool (Device);
+
+ return Status;
+}
+
+VOID
+PopulateI2cInformation (
+ IN VOID
+ )
+{
+ UINT32 Index;
+
+ for (Index = 0; Index < ARRAY_SIZE (mI2cDesc); Index++) {
+ mI2cDesc[Index].StartDesc.Desc = ACPI_ADDRESS_SPACE_DESCRIPTOR;
+ mI2cDesc[Index].StartDesc.Len = sizeof (EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR)
- 3;
+ mI2cDesc[Index].StartDesc.ResType = ACPI_ADDRESS_SPACE_TYPE_MEM;
+ mI2cDesc[Index].StartDesc.GenFlag = 0;
+ mI2cDesc[Index].StartDesc.SpecificFlag = 0;
+ mI2cDesc[Index].StartDesc.AddrSpaceGranularity = 32;
+ mI2cDesc[Index].StartDesc.AddrRangeMin = BCM2836_I2C1_BASE_ADDRESS;
+ mI2cDesc[Index].StartDesc.AddrRangeMax =
mI2cDesc[Index].StartDesc.AddrRangeMin + BCM2836_I2C1_LENGTH;
+ mI2cDesc[Index].StartDesc.AddrTranslationOffset = 0;
+ mI2cDesc[Index].StartDesc.AddrLen = BCM2836_I2C1_LENGTH;
+
+ mI2cDesc[Index].EndDesc = ACPI_END_TAG_DESCRIPTOR;
+ }
+}
+
+EFI_STATUS
+EFIAPI
+BcmI2CPlatformDxeEntryPoint (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+{
+ EFI_STATUS Status;
+ EFI_HANDLE Handle;
+
+ Handle = NULL;
+
+ PopulateI2cInformation ();
+
+ if (PcdGet32 (PcdHwRtc))
+ {
+ DEBUG ((DEBUG_ERROR, "RTC I2C enable\n"));
+ // If we don't register this, the second rtc won't get enabled
+ // leaving the emulator in place.
+ Status = RegisterDevice (&gBcmNonDiscoverableI2cMasterGuid,
+ &mI2cDesc[0], &Handle);
+ ASSERT_EFI_ERROR (Status);
+
+ //
+ // Install the DS1307 I2C Master protocol on this handle so the RTC driver
+ // can identify it as the I2C master it can invoke directly.
+ //
+ Status = gBS->InstallProtocolInterface (&Handle,
+ &gDs1307RealTimeClockLibI2cMasterProtocolGuid,
+ EFI_NATIVE_INTERFACE, NULL);
+ ASSERT_EFI_ERROR (Status);
+ } else {
+ DEBUG ((DEBUG_ERROR, "RTC I2C disabled\n"));
+ }
+
+ return EFI_SUCCESS;
+}
diff --git a/Platform/RaspberryPi/Drivers/BcmI2CPlatform/BcmI2CPlatform.inf
b/Platform/RaspberryPi/Drivers/BcmI2CPlatform/BcmI2CPlatform.inf
new file mode 100644
index 0000000000..aa5c1b51b2
--- /dev/null
+++ b/Platform/RaspberryPi/Drivers/BcmI2CPlatform/BcmI2CPlatform.inf
@@ -0,0 +1,54 @@
+## @file
+#
+# Component description file for Bcm/Rpi I2C driver.
+#
+# Copyright 2018-2020 NXP
+# Sourced and reworked from edk2/NXP I2C stack
+# Copyright 2022 Arm, Jeremy Linton
+#
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+##
+
+[Defines]
+ INF_VERSION = 0x0001001A
+ BASE_NAME = BcmI2CPlatformDxe
+ FILE_GUID = 1a23fe23-39bc-4bee-859d-ecb5bbb60484
+ MODULE_TYPE = DXE_DRIVER
+ VERSION_STRING = 1.0
+ ENTRY_POINT = BcmI2CPlatformDxeEntryPoint
+
+[Sources]
+ BcmI2CPlatform.c
+
+[Packages]
+ ArmPkg/ArmPkg.dec
+ MdeModulePkg/MdeModulePkg.dec
+ MdePkg/MdePkg.dec
+ Silicon/Maxim/Library/Ds1307RtcLib/Ds1307RtcLib.dec
+ Silicon/Broadcom/Bcm283x/Bcm283x.dec
+ Platform/RaspberryPi/RaspberryPi.dec
+
+[LibraryClasses]
+ BaseLib
+ BaseMemoryLib
+ DebugLib
+ MemoryAllocationLib
+ PcdLib
+ UefiBootServicesTableLib
+ UefiDriverEntryPoint
+ UefiLib
+
+[Guids]
+ gBcmNonDiscoverableI2cMasterGuid
+
+[Protocols]
+ gEdkiiNonDiscoverableDeviceProtocolGuid ## PRODUCES
+ gDs1307RealTimeClockLibI2cMasterProtocolGuid ## PRODUCES
+
+[Pcd]
+ gBcm283xTokenSpaceGuid.PcdBcm283xRegistersAddress
+ gRaspberryPiTokenSpaceGuid.PcdHwRtc
+
+[Depex]
+ gRaspberryPiConfigAppliedProtocolGuid
--
2.43.0
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