From: Jeremy Linton <lintonrjer...@gmail.com>
Add a stub for the Broadcom Genet network interface, that is used
by the Raspberry Pi 4 (and that may be used by other platforms).
For the time being, the stub only performs UMAC init, using a MAC
address PCD, as, even without a working network interface in UEFI
environment, it is desirable if the hardware can describe itself
for booting in an ACPI environment, rather than pass parameters via
DSDT/DSD .
Signed-off-by: Pete Batard <p...@akeo.ie>
---
Silicon/Broadcom/Drivers/Net/BcmGenetDxe/BcmGenetDxe.inf | 40 +++++++
Silicon/Broadcom/Drivers/Net/BcmGenetDxe/Genet.c | 114
++++++++++++++++++++
Silicon/Broadcom/Drivers/Net/BcmGenetDxe/Genet.h | 20 ++++
Silicon/Broadcom/Drivers/Net/BcmNet.dec | 22 ++++
4 files changed, 196 insertions(+)
diff --git a/Silicon/Broadcom/Drivers/Net/BcmGenetDxe/BcmGenetDxe.inf
b/Silicon/Broadcom/Drivers/Net/BcmGenetDxe/BcmGenetDxe.inf
new file mode 100644
index 000000000000..9e9301608f24
--- /dev/null
+++ b/Silicon/Broadcom/Drivers/Net/BcmGenetDxe/BcmGenetDxe.inf
@@ -0,0 +1,40 @@
+## @file
+#
+# Copyright (c) 2020, Jeremy Linton All rights reserved.<BR>
+#
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+##
+
+[Defines]
+ INF_VERSION = 0x0001001A
+ BASE_NAME = BcmGenetDxe
+ FILE_GUID = e2b1eaf3-50b7-4ae1-b79e-ec8020cb57ac
+ MODULE_TYPE = DXE_DRIVER
+ VERSION_STRING = 0.1
+ ENTRY_POINT = GenetEntryPoint
+
+[Sources]
+ Genet.c
+
+[Packages]
+ ArmPkg/ArmPkg.dec
+ MdeModulePkg/MdeModulePkg.dec
+ MdePkg/MdePkg.dec
+ Silicon/Broadcom/Drivers/Net/BcmNet.dec
+
+[LibraryClasses]
+ ArmLib
+ BaseLib
+ IoLib
+ UefiDriverEntryPoint
+ UefiLib
+
+[FixedPcd]
+ gBcmNetTokenSpaceGuid.PcdBcmGenetRegistersAddress
+
+[Pcd]
+ gBcmNetTokenSpaceGuid.PcdBcmGenetMacAddress
+
+[Depex]
+ TRUE
diff --git a/Silicon/Broadcom/Drivers/Net/BcmGenetDxe/Genet.c
b/Silicon/Broadcom/Drivers/Net/BcmGenetDxe/Genet.c
new file mode 100644
index 000000000000..9f29bc0c0894
--- /dev/null
+++ b/Silicon/Broadcom/Drivers/Net/BcmGenetDxe/Genet.c
@@ -0,0 +1,114 @@
+/** @file
+
+ Copyright (c) 2020, Jeremy Linton All rights reserved.<BR>
+
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+ This driver acts like a stub to set the Broadcom
+ Genet MAC address, until the actual network driver
+ is in place.
+
+**/
+
+#include <Library/ArmLib.h>
+#include <Library/DebugLib.h>
+#include <Library/IoLib.h>
+#include <Library/PcdLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+#include <Library/UefiLib.h>
+
+#include <Genet.h>
+#include <PiDxe.h>
+
+STATIC
+VOID
+RMWRegister (
+ UINT32 Offset,
+ UINT32 Mask,
+ UINT32 In
+ )
+{
+ EFI_PHYSICAL_ADDRESS Addr;
+ UINT32 Data;
+ UINT32 Shift;
+
+ Addr = GENET_BASE_ADDRESS + Offset;
+ Data = 0;
+ Shift = 1;
+ if (In) {
+ while (!(Mask & Shift))
+ Shift <<= 1;
+ Data = (MmioRead32 (Addr) & ~Mask) | ((In * Shift) & Mask);
+ } else {
+ Data = MmioRead32 (Addr) & ~Mask;
+ }
+
+ MmioWrite32 (Addr, Data);
+
+ ArmDataMemoryBarrier ();
+}
+
+STATIC
+VOID
+WdRegister (
+ UINT32 Offset,
+ UINT32 In
+ )
+{
+ EFI_PHYSICAL_ADDRESS Base = GENET_BASE_ADDRESS;
+
+ MmioWrite32 (Base + Offset, In);
+
+ ArmDataMemoryBarrier ();
+}
+
+STATIC
+VOID
+SetMacAddress (
+ UINT8* MacAddr
+)
+{
+ // Bring the UMAC out of reset
+ RMWRegister (GENET_SYS_RBUF_FLUSH_CTRL, 0x2, 1);
+ gBS->Stall (10);
+ RMWRegister (GENET_SYS_RBUF_FLUSH_CTRL, 0x2, 0);
+
+ // Update the MAC
+ DEBUG ((DEBUG_INFO, "Using MAC address %02X:%02X:%02X:%02X:%02X:%02X\n",
+ MacAddr[0], MacAddr[1], MacAddr[2], MacAddr[3], MacAddr[4], MacAddr[5]));
+
+ WdRegister (GENET_UMAC_MAC0, (MacAddr[0] << 24) | (MacAddr[1] << 16) |
+ (MacAddr[2] << 8) | MacAddr[3]);
+ WdRegister (GENET_UMAC_MAC1, (MacAddr[4] << 8) | MacAddr[5]);
+
+}
+
+/**
+ The entry point of Genet UEFI Driver.
+
+ @param ImageHandle The image handle of the UEFI Driver.
+ @param SystemTable A pointer to the EFI System Table.
+
+ @retval EFI_SUCCESS The Driver or UEFI Driver exited normally.
+ @retval EFI_INCOMPATIBLE_VERSION _gUefiDriverRevision is greater than
+ SystemTable->Hdr.Revision.
+
+**/
+EFI_STATUS
+EFIAPI
+GenetEntryPoint (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+{
+ UINT64 MacAddr;
+
+ // Read the MAC address
+ MacAddr = PcdGet64 (PcdBcmGenetMacAddress);
+
+ if (MacAddr != 0) {
+ SetMacAddress ((UINT8*)&MacAddr);
+ }
+
+ return EFI_SUCCESS;
+}
diff --git a/Silicon/Broadcom/Drivers/Net/BcmGenetDxe/Genet.h
b/Silicon/Broadcom/Drivers/Net/BcmGenetDxe/Genet.h
new file mode 100644
index 000000000000..4a3827c0e0d1
--- /dev/null
+++ b/Silicon/Broadcom/Drivers/Net/BcmGenetDxe/Genet.h
@@ -0,0 +1,20 @@
+/** @file
+
+ Copyright (c) 2020, Pete Batard <p...@akeo.ie>
+
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#ifndef BCM_GENET_H__
+#define BCM_GENET_H__
+
+#include <Library/PcdLib.h>
+
+#define GENET_BASE_ADDRESS (FixedPcdGet64
(PcdBcmGenetRegistersAddress))
+
+#define GENET_SYS_RBUF_FLUSH_CTRL 0x0008
+#define GENET_UMAC_MAC0 0x080c
+#define GENET_UMAC_MAC1 0x0810
+
+#endif /* BCM_GENET_H__ */
diff --git a/Silicon/Broadcom/Drivers/Net/BcmNet.dec
b/Silicon/Broadcom/Drivers/Net/BcmNet.dec
new file mode 100644
index 000000000000..2a8688cb09a7
--- /dev/null
+++ b/Silicon/Broadcom/Drivers/Net/BcmNet.dec
@@ -0,0 +1,22 @@
+## @file
+#
+# Copyright (c) 2020, Pete Batard <p...@akeo.ie>
+#
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+##
+
+[Defines]
+ DEC_SPECIFICATION = 0x0001001A
+ PACKAGE_NAME = BcmNetPkg
+ PACKAGE_GUID = 34E19823-D23A-41AB-9C09-ED1225B32DFF
+ PACKAGE_VERSION = 1.0
+
+[Guids]
+ gBcmNetTokenSpaceGuid = {0x12b97d70, 0x9149, 0x4c2f, {0x82, 0xd5, 0xad,
0xa9, 0x1e, 0x92, 0x75, 0xa1}}
+
+[PcdsFixedAtBuild]
+ gBcmNetTokenSpaceGuid.PcdBcmGenetRegistersAddress|0x0|UINT64|0x00000001
+
+[PcdsDynamic]
+ gBcmNetTokenSpaceGuid.PcdBcmGenetMacAddress|0x0|UINT64|0x00000002
--
2.21.0.windows.1
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