* [edk2-devel] [RFC 1/6] Silicon/Bcm283x: Document the I2C registers
2024-01-11 0:04 [edk2-devel] [RFC 0/6] RasberryPi: RTC HAT support Jeremy Linton
@ 2024-01-11 0:04 ` Jeremy Linton
2024-01-11 0:04 ` [edk2-devel] [RFC 2/6] Silicon/Bcm283x: Add core I2C drivers Jeremy Linton
` (4 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: Jeremy Linton @ 2024-01-11 0:04 UTC (permalink / raw)
To: devel; +Cc: ardb+tianocore, quic_llindhol, Jeremy Linton
Since we are now using I2C in edk2, its helpful if we document
the register names.
Signed-off-by: Jeremy Linton <jeremy.linton@arm.com>
---
.../Include/IndustryStandard/Bcm2836.h | 34 +++++++++++++++++++
1 file changed, 34 insertions(+)
diff --git a/Silicon/Broadcom/Bcm283x/Include/IndustryStandard/Bcm2836.h b/Silicon/Broadcom/Bcm283x/Include/IndustryStandard/Bcm2836.h
index 55a446a86c..6dc8921346 100644
--- a/Silicon/Broadcom/Bcm283x/Include/IndustryStandard/Bcm2836.h
+++ b/Silicon/Broadcom/Bcm283x/Include/IndustryStandard/Bcm2836.h
@@ -97,6 +97,40 @@
#define BCM2836_I2C2_BASE_ADDRESS (BCM2836_SOC_REGISTERS + BCM2836_I2C2_OFFSET)
#define BCM2836_I2C2_LENGTH 0x00000020
+#define BCM2836_I2C3_OFFSET 0x00205600
+#define BCM2836_I2C3_BASE_ADDRESS (BCM2836_SOC_REGISTERS + BCM2836_I2C3_OFFSET)
+#define BCM2836_I2C3_LENGTH 0x00000020
+
+#define BCM2836_I2C4_OFFSET 0x00205800
+#define BCM2836_I2C4_BASE_ADDRESS (BCM2836_SOC_REGISTERS + BCM2836_I2C4_OFFSET)
+#define BCM2836_I2C4_LENGTH 0x00000020
+
+#define BCM2836_I2C5_OFFSET 0x00205a00 //2711 doc says 205a80?!
+#define BCM2836_I2C5_BASE_ADDRESS (BCM2836_SOC_REGISTERS + BCM2836_I2C5_OFFSET)
+#define BCM2836_I2C5_LENGTH 0x00000020
+
+#define BCM2836_I2C6_OFFSET 0x00205c00
+#define BCM2836_I2C6_BASE_ADDRESS (BCM2836_SOC_REGISTERS + BCM2836_I2C6_OFFSET)
+#define BCM2836_I2C6_LENGTH 0x00000020
+
+#define BCM2836_I2C20_OFFSET 0x00f04500 //2711 DCC0
+#define BCM2836_I2C20_BASE_ADDRESS (BCM2836_SOC_REGISTERS + BCM2836_I2C20_OFFSET)
+#define BCM2836_I2C20_LENGTH 0x00000020
+
+#define BCM2836_I2C21_OFFSET 0x00f09500 //2711 DCC1
+#define BCM2836_I2C21_BASE_ADDRESS (BCM2836_SOC_REGISTERS + BCM2836_I2C21_OFFSET)
+#define BCM2836_I2C21_LENGTH 0x00000020
+
+/* I2C register offsets */
+#define BCM2835_I2C_C 0x00
+#define BCM2835_I2C_S 0x04
+#define BCM2835_I2C_DLEN 0x08
+#define BCM2835_I2C_A 0x0c
+#define BCM2835_I2C_FIFO 0x10
+#define BCM2835_I2C_DIV 0x14
+#define BCM2835_I2C_DEL 0x18
+#define BCM2835_I2C_CLKT 0x1c
+
#define BCM2836_SPI0_OFFSET 0x00204000
#define BCM2836_SPI0_BASE_ADDRESS (BCM2836_SOC_REGISTERS + BCM2836_SPI0_OFFSET)
#define BCM2836_SPI0_LENGTH 0x00000020
--
2.43.0
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^ permalink raw reply related [flat|nested] 7+ messages in thread* [edk2-devel] [RFC 2/6] Silicon/Bcm283x: Add core I2C drivers
2024-01-11 0:04 [edk2-devel] [RFC 0/6] RasberryPi: RTC HAT support Jeremy Linton
2024-01-11 0:04 ` [edk2-devel] [RFC 1/6] Silicon/Bcm283x: Document the I2C registers Jeremy Linton
@ 2024-01-11 0:04 ` Jeremy Linton
2024-01-11 0:04 ` [edk2-devel] [RFC 3/6] Platform/RasberryPi: Create I2C driver bound to RTC Jeremy Linton
` (3 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: Jeremy Linton @ 2024-01-11 0:04 UTC (permalink / raw)
To: devel; +Cc: ardb+tianocore, quic_llindhol, Jeremy Linton
There are a number of I2C interfaces on the rpi, some of which are
available on the GPIO connector and are utilized by various HATs. In
particular we are interested in the RTCs (usually based on DS1037)
which are attached to GPIO2/3 which can be pin muxed to I2C #1.
This commit adds a basic runtime utilizable I2C Dxe in preparation
for a platform driver which can bind it to the ds1307 RTC driver.
Signed-off-by: Jeremy Linton <jeremy.linton@arm.com>
---
.../Broadcom/Drivers/I2cDxe/ComponentName.c | 181 ++++++++++
.../Broadcom/Drivers/I2cDxe/DriverBinding.c | 237 ++++++++++++++
Silicon/Broadcom/Drivers/I2cDxe/I2cDxe.c | 309 ++++++++++++++++++
Silicon/Broadcom/Drivers/I2cDxe/I2cDxe.h | 55 ++++
Silicon/Broadcom/Drivers/I2cDxe/I2cDxe.inf | 56 ++++
5 files changed, 838 insertions(+)
create mode 100644 Silicon/Broadcom/Drivers/I2cDxe/ComponentName.c
create mode 100644 Silicon/Broadcom/Drivers/I2cDxe/DriverBinding.c
create mode 100644 Silicon/Broadcom/Drivers/I2cDxe/I2cDxe.c
create mode 100644 Silicon/Broadcom/Drivers/I2cDxe/I2cDxe.h
create mode 100644 Silicon/Broadcom/Drivers/I2cDxe/I2cDxe.inf
diff --git a/Silicon/Broadcom/Drivers/I2cDxe/ComponentName.c b/Silicon/Broadcom/Drivers/I2cDxe/ComponentName.c
new file mode 100644
index 0000000000..75b4fdb3fe
--- /dev/null
+++ b/Silicon/Broadcom/Drivers/I2cDxe/ComponentName.c
@@ -0,0 +1,181 @@
+/** @file
+
+ Copyright 2018-2019 NXP
+ Sourced and reworked from edk2/NXP I2C stack
+ Copyright 2022 Arm, Jeremy Linton
+
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include "I2cDxe.h"
+
+STATIC EFI_UNICODE_STRING_TABLE mBcmI2cDriverNameTable[] = {
+ {
+ "en",
+ (CHAR16 *)L"Bcm I2C Driver"
+ },
+ { }
+};
+
+STATIC EFI_UNICODE_STRING_TABLE mBcmI2cControllerNameTable[] = {
+ {
+ "en",
+ (CHAR16 *)L"Bcm I2C Controller"
+ },
+ { }
+};
+
+/**
+ Retrieves a Unicode string that is the user readable name of the driver.
+
+ This function retrieves the user readable name of a driver in the form of a
+ Unicode string. If the driver specified by This has a user readable name in
+ the language specified by Language, then a pointer to the driver name is
+ returned in DriverName, and EFI_SUCCESS is returned. If the driver specified
+ by This does not support the language specified by Language,
+ then EFI_UNSUPPORTED is returned.
+
+ @param This[in] A pointer to the EFI_COMPONENT_NAME2_PROTOCOL or
+ EFI_COMPONENT_NAME_PROTOCOL instance.
+
+ @param Language[in] A pointer to a Null-terminated ASCII string
+ array indicating the language. This is the
+ language of the driver name that the caller is
+ requesting, and it must match one of the
+ languages specified in SupportedLanguages. The
+ number of languages supported by a driver is up
+ to the driver writer. Language is specified
+ in RFC 4646 or ISO 639-2 language code format.
+
+ @param DriverName[out] A pointer to the Unicode string to return.
+ This Unicode string is the name of the
+ driver specified by This in the language
+ specified by Language.
+
+ @retval EFI_SUCCESS The Unicode string for the Driver specified by
+ This and the language specified by Language was
+ returned in DriverName.
+
+ @retval EFI_INVALID_PARAMETER Language is NULL.
+
+ @retval EFI_INVALID_PARAMETER DriverName is NULL.
+
+ @retval EFI_UNSUPPORTED The driver specified by This does not support
+ the language specified by Language.
+
+**/
+STATIC
+EFI_STATUS
+EFIAPI
+BcmI2cGetDriverName (
+ IN EFI_COMPONENT_NAME2_PROTOCOL *This,
+ IN CHAR8 *Language,
+ OUT CHAR16 **DriverName
+ )
+{
+ return LookupUnicodeString2 (Language,
+ This->SupportedLanguages,
+ mBcmI2cDriverNameTable,
+ DriverName,
+ FALSE);
+}
+
+/**
+ Retrieves a Unicode string that is the user readable name of the controller
+ that is being managed by a driver.
+
+ This function retrieves the user readable name of the controller specified by
+ ControllerHandle and ChildHandle in the form of a Unicode string. If the
+ driver specified by This has a user readable name in the language specified by
+ Language, then a pointer to the controller name is returned in ControllerName,
+ and EFI_SUCCESS is returned. If the driver specified by This is not currently
+ managing the controller specified by ControllerHandle and ChildHandle,
+ then EFI_UNSUPPORTED is returned. If the driver specified by This does not
+ support the language specified by Language, then EFI_UNSUPPORTED is returned.
+
+ @param This[in] A pointer to the EFI_COMPONENT_NAME2_PROTOCOL or
+ EFI_COMPONENT_NAME_PROTOCOL instance.
+
+ @param ControllerHandle[in] The handle of a controller that the driver
+ specified by This is managing. This handle
+ specifies the controller whose name is to be
+ returned.
+
+ @param ChildHandle[in] The handle of the child controller to retrieve
+ the name of. This is an optional parameter that
+ may be NULL. It will be NULL for device
+ drivers. It will also be NULL for a bus drivers
+ that wish to retrieve the name of the bus
+ controller. It will not be NULL for a bus
+ driver that wishes to retrieve the name of a
+ child controller.
+
+ @param Language[in] A pointer to a Null-terminated ASCII string
+ array indicating the language. This is the
+ language of the driver name that the caller is
+ requesting, and it must match one of the
+ languages specified in SupportedLanguages. The
+ number of languages supported by a driver is up
+ to the driver writer. Language is specified in
+ RFC 4646 or ISO 639-2 language code format.
+
+ @param ControllerName[out] A pointer to the Unicode string to return.
+ This Unicode string is the name of the
+ controller specified by ControllerHandle and
+ ChildHandle in the language specified by
+ Language from the point of view of the driver
+ specified by This.
+
+ @retval EFI_SUCCESS The Unicode string for the user readable name in
+ the language specified by Language for the
+ driver specified by This was returned in
+ DriverName.
+
+ @retval EFI_INVALID_PARAMETER ControllerHandle is NULL.
+
+ @retval EFI_INVALID_PARAMETER ChildHandle is not NULL and it is not a valid
+ EFI_HANDLE.
+
+ @retval EFI_INVALID_PARAMETER Language is NULL.
+
+ @retval EFI_INVALID_PARAMETER ControllerName is NULL.
+
+ @retval EFI_UNSUPPORTED The driver specified by This is not currently
+ managing the controller specified by
+ ControllerHandle and ChildHandle.
+
+ @retval EFI_UNSUPPORTED The driver specified by This does not support
+ the language specified by Language.
+
+**/
+STATIC
+EFI_STATUS
+EFIAPI
+BcmI2cGetControllerName (
+ IN EFI_COMPONENT_NAME2_PROTOCOL *This,
+ IN EFI_HANDLE ControllerHandle,
+ IN EFI_HANDLE ChildHandle OPTIONAL,
+ IN CHAR8 *Language,
+ OUT CHAR16 **ControllerName
+ )
+{
+ if (ChildHandle != NULL) {
+ return EFI_UNSUPPORTED;
+ }
+
+ return LookupUnicodeString2 (Language,
+ This->SupportedLanguages,
+ mBcmI2cControllerNameTable,
+ ControllerName,
+ FALSE);
+}
+
+//
+// EFI Component Name 2 Protocol
+//
+EFI_COMPONENT_NAME2_PROTOCOL gBcmI2cDriverComponentName2 = {
+ BcmI2cGetDriverName,
+ BcmI2cGetControllerName,
+ "en"
+};
diff --git a/Silicon/Broadcom/Drivers/I2cDxe/DriverBinding.c b/Silicon/Broadcom/Drivers/I2cDxe/DriverBinding.c
new file mode 100644
index 0000000000..a6cd7987eb
--- /dev/null
+++ b/Silicon/Broadcom/Drivers/I2cDxe/DriverBinding.c
@@ -0,0 +1,237 @@
+/** @file
+
+ Copyright 2018-2019 NXP
+ Sourced and reworked from edk2/NXP I2C stack
+ Copyright 2022 Arm, Jeremy Linton
+
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <Library/BaseMemoryLib.h>
+#include <Library/DebugLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+
+#include <Protocol/DriverBinding.h>
+
+#include "I2cDxe.h"
+
+/**
+ Tests to see if this driver supports a given controller.
+
+ @param This[in] A pointer to the EFI_DRIVER_BINDING_PROTOCOL
+ instance.
+ @param ControllerHandle[in] The handle of the controller to test.
+ @param RemainingDevicePath[in] The remaining device path.
+ (Ignored - this is not a bus driver.)
+
+ @retval EFI_SUCCESS The driver supports this controller.
+ @retval EFI_ALREADY_STARTED The device specified by ControllerHandle is
+ already being managed by the driver specified
+ by This.
+ @retval EFI_UNSUPPORTED The device specified by ControllerHandle is
+ not supported by the driver specified by This.
+
+**/
+EFI_STATUS
+EFIAPI
+BcmI2cDriverBindingSupported (
+ IN EFI_DRIVER_BINDING_PROTOCOL *This,
+ IN EFI_HANDLE ControllerHandle,
+ IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
+ )
+{
+ NON_DISCOVERABLE_DEVICE *Dev;
+ EFI_STATUS Status;
+
+ //
+ // Connect to the non-discoverable device
+ //
+ Status = gBS->OpenProtocol (ControllerHandle,
+ &gEdkiiNonDiscoverableDeviceProtocolGuid,
+ (VOID **) &Dev,
+ This->DriverBindingHandle,
+ ControllerHandle,
+ EFI_OPEN_PROTOCOL_BY_DRIVER);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ if (CompareGuid (Dev->Type, &gBcmNonDiscoverableI2cMasterGuid)) {
+ Status = EFI_SUCCESS;
+ } else {
+ Status = EFI_UNSUPPORTED;
+ }
+
+ //
+ // Clean up.
+ //
+ gBS->CloseProtocol (ControllerHandle,
+ &gEdkiiNonDiscoverableDeviceProtocolGuid,
+ This->DriverBindingHandle,
+ ControllerHandle);
+
+ return Status;
+}
+
+
+/**
+ Starts a device controller or a bus controller.
+
+ @param[in] This A pointer to the EFI_DRIVER_BINDING_PROTOCOL
+ instance.
+ @param[in] ControllerHandle The handle of the device to start. This
+ handle must support a protocol interface that
+ supplies an I/O abstraction to the driver.
+ @param[in] RemainingDevicePath The remaining portion of the device path.
+ (Ignored - this is not a bus driver.)
+
+ @retval EFI_SUCCESS The device was started.
+ @retval EFI_DEVICE_ERROR The device could not be started due to a
+ device error.
+ @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a
+ lack of resources.
+
+**/
+EFI_STATUS
+EFIAPI
+BcmI2cDriverBindingStart (
+ IN EFI_DRIVER_BINDING_PROTOCOL *This,
+ IN EFI_HANDLE ControllerHandle,
+ IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL
+ )
+{
+ return BcmI2cInit (This->DriverBindingHandle, ControllerHandle);
+}
+
+
+/**
+ Stops a device controller or a bus controller.
+
+ @param[in] This A pointer to the EFI_DRIVER_BINDING_PROTOCOL
+ instance.
+ @param[in] ControllerHandle A handle to the device being stopped. The handle
+ must support a bus specific I/O protocol for the
+ driver to use to stop the device.
+ @param[in] NumberOfChildren The number of child device handles in
+ ChildHandleBuffer.
+ @param[in] ChildHandleBuffer An array of child handles to be freed. May be
+ NULL if NumberOfChildren is 0.
+
+ @retval EFI_SUCCESS The device was stopped.
+ @retval EFI_DEVICE_ERROR The device could not be stopped due to a device
+ error.
+
+**/
+EFI_STATUS
+EFIAPI
+BcmI2cDriverBindingStop (
+ IN EFI_DRIVER_BINDING_PROTOCOL *This,
+ IN EFI_HANDLE ControllerHandle,
+ IN UINTN NumberOfChildren,
+ IN EFI_HANDLE *ChildHandleBuffer OPTIONAL
+ )
+{
+ return BcmI2cRelease (This->DriverBindingHandle, ControllerHandle);
+}
+
+
+STATIC EFI_DRIVER_BINDING_PROTOCOL gBcmI2cDriverBinding = {
+ BcmI2cDriverBindingSupported,
+ BcmI2cDriverBindingStart,
+ BcmI2cDriverBindingStop,
+ 0xa,
+ NULL,
+ NULL
+};
+
+
+/**
+ The entry point of I2c 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
+I2cDxeEntryPoint (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+{
+ EFI_STATUS Status;
+
+ //
+ // Add the driver to the list of drivers
+ //
+ Status = EfiLibInstallDriverBindingComponentName2 (
+ ImageHandle, SystemTable, &gBcmI2cDriverBinding, ImageHandle,
+ NULL, &gBcmI2cDriverComponentName2);
+ ASSERT_EFI_ERROR (Status);
+
+ return EFI_SUCCESS;
+}
+
+
+/**
+ Unload function for the I2c UEFI Driver.
+
+ @param ImageHandle[in] The allocated handle for the EFI image
+
+ @retval EFI_SUCCESS The driver was unloaded successfully
+ @retval EFI_INVALID_PARAMETER ImageHandle is not a valid image handle.
+
+**/
+EFI_STATUS
+EFIAPI
+I2cDxeUnload (
+ IN EFI_HANDLE ImageHandle
+ )
+{
+ EFI_STATUS Status;
+ EFI_HANDLE *HandleBuffer;
+ UINTN HandleCount;
+ UINTN Index;
+
+ //
+ // Retrieve all USB I/O handles in the handle database
+ //
+ Status = gBS->LocateHandleBuffer (ByProtocol,
+ &gEdkiiNonDiscoverableDeviceProtocolGuid,
+ NULL,
+ &HandleCount,
+ &HandleBuffer);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ //
+ // Disconnect the driver from the handles in the handle database
+ //
+ for (Index = 0; Index < HandleCount; Index++) {
+ Status = gBS->DisconnectController (HandleBuffer[Index],
+ gImageHandle,
+ NULL);
+ }
+
+ //
+ // Free the handle array
+ //
+ gBS->FreePool (HandleBuffer);
+
+ //
+ // Uninstall protocols installed by the driver in its entrypoint
+ //
+ Status = gBS->UninstallMultipleProtocolInterfaces (ImageHandle,
+ &gEfiDriverBindingProtocolGuid,
+ &gBcmI2cDriverBinding,
+ NULL
+ );
+
+ return EFI_SUCCESS;
+}
diff --git a/Silicon/Broadcom/Drivers/I2cDxe/I2cDxe.c b/Silicon/Broadcom/Drivers/I2cDxe/I2cDxe.c
new file mode 100644
index 0000000000..8aedaa1f58
--- /dev/null
+++ b/Silicon/Broadcom/Drivers/I2cDxe/I2cDxe.c
@@ -0,0 +1,309 @@
+/** I2cDxe.c
+ I2c driver APIs for read, write, initialize, set speed and reset
+
+ Sourced and reworked from edk2/NXP I2C stack
+ Copyright 2022 Arm, Jeremy Linton
+
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <Library/BaseMemoryLib.h>
+#include <Library/DebugLib.h>
+#include <Library/DevicePathLib.h>
+#include <Library/IoLib.h>
+#include <Library/MemoryAllocationLib.h>
+#include <Library/TimerLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+#include <Library/UefiLib.h>
+#include <Library/UefiRuntimeLib.h>
+
+#include <IndustryStandard/Bcm2836.h>
+
+#include "I2cDxe.h"
+
+STATIC CONST EFI_I2C_CONTROLLER_CAPABILITIES mI2cControllerCapabilities = {
+ 0,
+ 0,
+ 0,
+ 0
+};
+
+/**
+ Function to set i2c bus frequency
+
+ @param This Pointer to I2c master protocol
+ @param BusClockHertz value to be set
+
+ @retval EFI_SUCCESS Operation successfull
+**/
+STATIC
+EFI_STATUS
+EFIAPI
+SetBusFrequency (
+ IN CONST EFI_I2C_MASTER_PROTOCOL *This,
+ IN OUT UINTN *BusClockHertz
+ )
+{
+ UINTN I2cBase;
+ UINT64 I2cClock;
+ BCM_I2C_MASTER *I2c;
+
+ I2c = BCM_I2C_FROM_THIS (This);
+
+ I2cBase = I2c->ControllerBase;
+
+ // depend on ConfigDxe? On the NXP this only sets the clock and resets the bus
+ // Here we are hardcoding the I2C clock until we have a need not to.
+ I2cClock = 50000;
+
+ return EFI_SUCCESS;
+}
+
+/**
+ Function to reset I2c Controller
+
+ @param This Pointer to I2c master protocol
+
+ @return EFI_SUCCESS Operation successfull
+**/
+STATIC
+EFI_STATUS
+EFIAPI
+Reset (
+ IN CONST EFI_I2C_MASTER_PROTOCOL *This
+ )
+{
+ return EFI_SUCCESS;
+}
+
+STATIC
+void
+StatusPoll(
+ UINTN I2cBase,
+ UINTN Mask
+ )
+{
+ UINTN Retry;
+
+ Retry = 0;
+ while ((MmioRead32 (I2cBase + BCM2835_I2C_S) & Mask) != Mask) {
+ Retry++;
+ }
+}
+
+
+
+STATIC
+EFI_STATUS
+SingleTransfer(
+ UINTN I2cBase,
+ UINTN SlaveAddress,
+ EFI_I2C_OPERATION *Operation
+)
+{
+ EFI_STATUS Status;
+ UINTN Index;
+ UINTN FifoState;
+
+ // clear all the status
+ MmioWrite32 (I2cBase + BCM2835_I2C_C, 0x10 ); // fifo clear
+ MmioWrite32 (I2cBase + BCM2835_I2C_S, 0x302);
+
+ // don't support 10 bit addr for now. (see 3.3 in 2711 manual)
+ // the problem with arm is that you never know if there are undocumented
+ // acces restrictions (aka 8 bit reg, but it needs to be read with a 32-bit instr)
+ MmioWrite8 (I2cBase + BCM2835_I2C_A, (UINT8)SlaveAddress);
+ MmioWrite32 (I2cBase + BCM2835_I2C_DLEN, Operation->LengthInBytes );
+
+ if (Operation->Flags & I2C_FLAG_READ) {
+ FifoState = 0x20; // fifo has data
+ MmioWrite32 (I2cBase + BCM2835_I2C_C, 0x8081 ); // Enable, start, fifo clear, read
+ } else {
+ FifoState = 0x10; // fifo can accept data
+ MmioWrite32 (I2cBase + BCM2835_I2C_C, 0x8080 ); // Enable, start, fifo clear, write
+ }
+
+ for (Index = 0; Index < Operation->LengthInBytes; Index++) {
+
+ StatusPoll (I2cBase, FifoState);
+
+ if (Operation->Flags & I2C_FLAG_READ) {
+ Operation->Buffer[Index] = MmioRead8 (I2cBase + BCM2835_I2C_FIFO);
+ } else {
+ MmioWrite8 (I2cBase + BCM2835_I2C_FIFO, Operation->Buffer[Index]);
+ }
+ }
+
+ StatusPoll (I2cBase, 0x02);
+
+ Status = 0;
+ return Status;
+}
+
+volatile UINTN forcewrite;
+
+STATIC
+EFI_STATUS
+EFIAPI
+StartRequest (
+ IN CONST EFI_I2C_MASTER_PROTOCOL *This,
+ IN UINTN SlaveAddress,
+ IN EFI_I2C_REQUEST_PACKET *RequestPacket,
+ IN EFI_EVENT Event OPTIONAL,
+ OUT EFI_STATUS *I2cStatus OPTIONAL
+ )
+{
+ BCM_I2C_MASTER *I2c;
+ UINTN I2cBase;
+ EFI_STATUS Status;
+ EFI_TPL Tpl;
+ BOOLEAN AtRuntime;
+ UINTN Index;
+
+ AtRuntime = EfiAtRuntime ();
+ if (!AtRuntime) {
+ Tpl = gBS->RaiseTPL (TPL_HIGH_LEVEL);
+ }
+
+ I2c = BCM_I2C_FROM_THIS (This);
+
+ I2cBase = I2c->ControllerBase;
+
+ for (Index = 0; Index < RequestPacket->OperationCount; Index++ ) {
+
+ Status = SingleTransfer (I2cBase, SlaveAddress, &RequestPacket->Operation[Index]);
+
+ if (EFI_ERROR (Status)) {
+ break;
+ }
+ }
+
+ if (!AtRuntime) {
+ gBS->RestoreTPL (Tpl);
+ }
+
+ return Status;
+}
+
+STATIC
+VOID
+EFIAPI
+BcmI2cVirtualAddressChangeEvent (
+ IN EFI_EVENT Event,
+ IN VOID *Context
+ )
+{
+ BCM_I2C_MASTER *I2c;
+
+ I2c = (BCM_I2C_MASTER *)Context;
+
+ EfiConvertPointer (0x0, (VOID**)&I2c->ControllerBase);
+ EfiConvertPointer (0x0, (VOID**)&I2c);
+}
+
+
+EFI_STATUS
+BcmI2cInit (
+ IN EFI_HANDLE DriverBindingHandle,
+ IN EFI_HANDLE ControllerHandle
+ )
+{
+ EFI_STATUS RetVal;
+ NON_DISCOVERABLE_DEVICE *Dev;
+ BCM_I2C_MASTER *I2c;
+ EFI_EVENT VirtualAddressChangeEvent;
+
+ RetVal = gBS->OpenProtocol (ControllerHandle,
+ &gEdkiiNonDiscoverableDeviceProtocolGuid,
+ (VOID **)&Dev, DriverBindingHandle,
+ ControllerHandle, EFI_OPEN_PROTOCOL_BY_DRIVER);
+ if (EFI_ERROR (RetVal)) {
+ return RetVal;
+ }
+
+ I2c = AllocateRuntimeZeroPool (sizeof (BCM_I2C_MASTER));
+
+ I2c->Signature = BCM_I2C_SIGNATURE;
+ I2c->I2cMaster.SetBusFrequency = SetBusFrequency;
+ I2c->I2cMaster.Reset = Reset;
+ I2c->I2cMaster.StartRequest = StartRequest;
+ I2c->I2cMaster.I2cControllerCapabilities = &mI2cControllerCapabilities;
+ I2c->Dev = Dev;
+
+ CopyGuid (&I2c->DevicePath.Vendor.Guid, &gEfiCallerIdGuid);
+ I2c->DevicePath.MmioBase = I2c->Dev->Resources[0].AddrRangeMin;
+ I2c->ControllerBase = I2c->Dev->Resources[0].AddrRangeMin;
+ SetDevicePathNodeLength (&I2c->DevicePath.Vendor,
+ sizeof (I2c->DevicePath) - sizeof (I2c->DevicePath.End));
+ SetDevicePathEndNode (&I2c->DevicePath.End);
+
+ RetVal = gBS->InstallMultipleProtocolInterfaces (&ControllerHandle,
+ &gEfiI2cMasterProtocolGuid, (VOID**)&I2c->I2cMaster,
+ &gEfiDevicePathProtocolGuid, &I2c->DevicePath,
+ NULL);
+
+ if (EFI_ERROR (RetVal)) {
+ FreePool (I2c);
+ gBS->CloseProtocol (ControllerHandle,
+ &gEdkiiNonDiscoverableDeviceProtocolGuid,
+ DriverBindingHandle,
+ ControllerHandle);
+ } else {
+ RetVal = gBS->CreateEventEx (
+ EVT_NOTIFY_SIGNAL,
+ TPL_NOTIFY,
+ BcmI2cVirtualAddressChangeEvent,
+ (VOID *)I2c,
+ &gEfiEventVirtualAddressChangeGuid,
+ &VirtualAddressChangeEvent
+ );
+
+ ASSERT_EFI_ERROR (RetVal);
+
+ }
+
+ return RetVal;
+}
+
+EFI_STATUS
+BcmI2cRelease (
+ IN EFI_HANDLE DriverBindingHandle,
+ IN EFI_HANDLE ControllerHandle
+ )
+{
+ EFI_I2C_MASTER_PROTOCOL *I2cMaster;
+ EFI_STATUS RetVal;
+ BCM_I2C_MASTER *I2c;
+
+ RetVal = gBS->HandleProtocol (ControllerHandle,
+ &gEfiI2cMasterProtocolGuid,
+ (VOID **)&I2cMaster);
+ ASSERT_EFI_ERROR (RetVal);
+ if (EFI_ERROR (RetVal)) {
+ return RetVal;
+ }
+
+ I2c = BCM_I2C_FROM_THIS (I2cMaster);
+
+ RetVal = gBS->UninstallMultipleProtocolInterfaces (ControllerHandle,
+ &gEfiI2cMasterProtocolGuid, I2cMaster,
+ &gEfiDevicePathProtocolGuid, &I2c->DevicePath,
+ NULL);
+ if (EFI_ERROR (RetVal)) {
+ return RetVal;
+ }
+
+ RetVal = gBS->CloseProtocol (ControllerHandle,
+ &gEdkiiNonDiscoverableDeviceProtocolGuid,
+ DriverBindingHandle,
+ ControllerHandle);
+ ASSERT_EFI_ERROR (RetVal);
+ if (EFI_ERROR (RetVal)) {
+ return RetVal;
+ }
+
+ gBS->FreePool (I2c);
+
+ return EFI_SUCCESS;
+}
diff --git a/Silicon/Broadcom/Drivers/I2cDxe/I2cDxe.h b/Silicon/Broadcom/Drivers/I2cDxe/I2cDxe.h
new file mode 100644
index 0000000000..e9ddc0e7bd
--- /dev/null
+++ b/Silicon/Broadcom/Drivers/I2cDxe/I2cDxe.h
@@ -0,0 +1,55 @@
+/** I2cDxe.h
+ Header defining the constant, base address amd function for I2C controller
+
+ Copyright 2017-2020 NXP
+ Sourced and reworked from edk2/NXP I2C stack
+ Copyright 2022 Arm, Jeremy Linton
+
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#ifndef I2C_DXE_H_
+#define I2C_DXE_H_
+
+#include <Library/UefiLib.h>
+#include <Uefi.h>
+
+#include <Protocol/I2cMaster.h>
+#include <Protocol/NonDiscoverableDevice.h>
+
+#define BCM_I2C_SIGNATURE SIGNATURE_32 ('B', 'I', '2', 'C')
+#define BCM_I2C_FROM_THIS(a) CR ((a), BCM_I2C_MASTER, \
+ I2cMaster, BCM_I2C_SIGNATURE)
+
+extern EFI_COMPONENT_NAME2_PROTOCOL gBcmI2cDriverComponentName2;
+
+#pragma pack(1)
+typedef struct {
+ VENDOR_DEVICE_PATH Vendor;
+ UINT64 MmioBase;
+ EFI_DEVICE_PATH_PROTOCOL End;
+} BCM_I2C_DEVICE_PATH;
+#pragma pack()
+
+typedef struct {
+ UINT32 Signature;
+ EFI_I2C_MASTER_PROTOCOL I2cMaster;
+ BCM_I2C_DEVICE_PATH DevicePath;
+ NON_DISCOVERABLE_DEVICE *Dev;
+ UINTN ControllerBase;
+} BCM_I2C_MASTER;
+
+EFI_STATUS
+BcmI2cInit (
+ IN EFI_HANDLE DriverBindingHandle,
+ IN EFI_HANDLE ControllerHandle
+ );
+
+EFI_STATUS
+BcmI2cRelease (
+ IN EFI_HANDLE DriverBindingHandle,
+ IN EFI_HANDLE ControllerHandle
+ );
+
+#endif //I2C_DXE_H_
diff --git a/Silicon/Broadcom/Drivers/I2cDxe/I2cDxe.inf b/Silicon/Broadcom/Drivers/I2cDxe/I2cDxe.inf
new file mode 100644
index 0000000000..d8b6130616
--- /dev/null
+++ b/Silicon/Broadcom/Drivers/I2cDxe/I2cDxe.inf
@@ -0,0 +1,56 @@
+# @file
+#
+# Component description file for I2c driver
+#
+# Copyright (c) 2015, Freescale Semiconductor, Inc. All rights reserved.
+# Copyright 2017-2020 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 = I2cDxe
+ FILE_GUID = 09e767d9-9c1e-405d-86c3-fb7ce355f948
+ MODULE_TYPE = DXE_RUNTIME_DRIVER
+ VERSION_STRING = 1.0
+ ENTRY_POINT = I2cDxeEntryPoint
+ UNLOAD = I2cDxeUnload
+
+[Sources.common]
+ ComponentName.c
+ DriverBinding.c
+ I2cDxe.c
+
+[LibraryClasses]
+ ArmLib
+ BaseMemoryLib
+ DevicePathLib
+ IoLib
+ MemoryAllocationLib
+ PcdLib
+ TimerLib
+ UefiBootServicesTableLib
+ UefiDriverEntryPoint
+ UefiLib
+ UefiRuntimeLib
+
+[Guids]
+ gBcmNonDiscoverableI2cMasterGuid
+ gEfiEventVirtualAddressChangeGuid
+
+[Packages]
+ MdeModulePkg/MdeModulePkg.dec
+ MdePkg/MdePkg.dec
+ Platform/RaspberryPi/RaspberryPi.dec
+ Silicon/Broadcom/Bcm283x/Bcm283x.dec
+
+[Protocols]
+ gEdkiiNonDiscoverableDeviceProtocolGuid ## TO_START
+ gEfiI2cMasterProtocolGuid ## BY_START
+
+[Depex]
+ TRUE
--
2.43.0
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^ permalink raw reply related [flat|nested] 7+ messages in thread* [edk2-devel] [RFC 3/6] Platform/RasberryPi: Create I2C driver bound to RTC
2024-01-11 0:04 [edk2-devel] [RFC 0/6] RasberryPi: RTC HAT support Jeremy Linton
2024-01-11 0:04 ` [edk2-devel] [RFC 1/6] Silicon/Bcm283x: Document the I2C registers Jeremy Linton
2024-01-11 0:04 ` [edk2-devel] [RFC 2/6] Silicon/Bcm283x: Add core I2C drivers Jeremy Linton
@ 2024-01-11 0:04 ` Jeremy Linton
2024-01-11 0:04 ` [edk2-devel] [RFC 4/6] Silicon/Maxim: Fix runtime issues Jeremy Linton
` (2 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: Jeremy Linton @ 2024-01-11 0:04 UTC (permalink / raw)
To: devel; +Cc: ardb+tianocore, quic_llindhol, Jeremy Linton
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.linton@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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^ permalink raw reply related [flat|nested] 7+ messages in thread* [edk2-devel] [RFC 4/6] Silicon/Maxim: Fix runtime issues
2024-01-11 0:04 [edk2-devel] [RFC 0/6] RasberryPi: RTC HAT support Jeremy Linton
` (2 preceding siblings ...)
2024-01-11 0:04 ` [edk2-devel] [RFC 3/6] Platform/RasberryPi: Create I2C driver bound to RTC Jeremy Linton
@ 2024-01-11 0:04 ` Jeremy Linton
2024-01-11 0:04 ` [edk2-devel] [RFC 5/6] Platform/RasberryPi: Add I2C1 to uefi runtime memory map Jeremy Linton
2024-01-11 0:04 ` [edk2-devel] [RFC 6/6] Platform/RaspberryPi: Add menu and build options for HW RTC Jeremy Linton
5 siblings, 0 replies; 7+ messages in thread
From: Jeremy Linton @ 2024-01-11 0:04 UTC (permalink / raw)
To: devel; +Cc: ardb+tianocore, quic_llindhol, Jeremy Linton
The Ds1307 is ideally a runtime RTC but its use of the I2C
protocol might make it better if it updated the I2C_MASTER_PROTOCOL
callbacks it uses, although... hmmm maybe think about this
a bit more.
Signed-off-by: Jeremy Linton <jeremy.linton@arm.com>
---
.../Maxim/Library/Ds1307RtcLib/Ds1307RtcLib.c | 36 +++++++++++++++++--
.../Library/Ds1307RtcLib/Ds1307RtcLib.inf | 7 +++-
2 files changed, 40 insertions(+), 3 deletions(-)
diff --git a/Silicon/Maxim/Library/Ds1307RtcLib/Ds1307RtcLib.c b/Silicon/Maxim/Library/Ds1307RtcLib/Ds1307RtcLib.c
index 444e011248..ede890448f 100644
--- a/Silicon/Maxim/Library/Ds1307RtcLib/Ds1307RtcLib.c
+++ b/Silicon/Maxim/Library/Ds1307RtcLib/Ds1307RtcLib.c
@@ -18,14 +18,40 @@
#include <Library/RealTimeClockLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/UefiLib.h>
+#include <Library/UefiRuntimeLib.h>
#include <Protocol/I2cMaster.h>
#include "Ds1307Rtc.h"
STATIC VOID *mDriverEventRegistration;
STATIC EFI_HANDLE mI2cMasterHandle;
+STATIC EFI_EVENT mRtcVirtualAddrChangeEvent;
STATIC EFI_I2C_MASTER_PROTOCOL *mI2cMaster;
+
+/**
+ Fixup internal data so that EFI can be call in virtual mode.
+ Call the passed in Child Notify event and convert any pointers in
+ lib to virtual mode.
+
+ @param[in] Event The Event that is being processed
+ @param[in] Context Event Context
+**/
+VOID
+EFIAPI
+LibRtcVirtualNotifyEvent (
+ IN EFI_EVENT Event,
+ IN VOID *Context
+ )
+{
+ EfiConvertPointer (0x0, (VOID **)&mI2cMaster->SetBusFrequency);
+ EfiConvertPointer (0x0, (VOID **)&mI2cMaster->Reset);
+ EfiConvertPointer (0x0, (VOID **)&mI2cMaster->StartRequest);
+ EfiConvertPointer (0x0, (VOID **)&mI2cMaster->I2cControllerCapabilities);
+ EfiConvertPointer (0x0, (VOID **)&mI2cMaster);
+}
+
+
/**
Read RTC register.
Data Read-Slave Transmitter Mode
@@ -54,7 +80,7 @@ RtcRead (
Req.OperationCount = 2;
- Req.SetAddressOp.Flags = 0;
+ Req.SetAddressOp.Flags = 0; //I2C_FLAG_WRITE
Req.SetAddressOp.LengthInBytes = sizeof (RtcRegAddr);
Req.SetAddressOp.Buffer = &RtcRegAddr;
@@ -98,7 +124,7 @@ RtcWrite (
Buffer[0] = RtcRegAddr;
Buffer[1] = Val;
- Req.SetAddressOp.Flags = 0;
+ Req.SetAddressOp.Flags = 0; //I2C_FLAG_WRITE
Req.SetAddressOp.LengthInBytes = sizeof (Buffer);
Req.SetAddressOp.Buffer = Buffer;
@@ -375,5 +401,11 @@ LibRtcInitialize (
NULL,
&mDriverEventRegistration);
+ Status = gBS->CreateEventEx (EVT_NOTIFY_SIGNAL, TPL_NOTIFY,
+ LibRtcVirtualNotifyEvent, NULL,
+ &gEfiEventVirtualAddressChangeGuid,
+ &mRtcVirtualAddrChangeEvent);
+ ASSERT_EFI_ERROR (Status);
+
return EFI_SUCCESS;
}
diff --git a/Silicon/Maxim/Library/Ds1307RtcLib/Ds1307RtcLib.inf b/Silicon/Maxim/Library/Ds1307RtcLib/Ds1307RtcLib.inf
index b92f658bfc..9d8cf16d28 100644
--- a/Silicon/Maxim/Library/Ds1307RtcLib/Ds1307RtcLib.inf
+++ b/Silicon/Maxim/Library/Ds1307RtcLib/Ds1307RtcLib.inf
@@ -28,6 +28,9 @@
UefiBootServicesTableLib
UefiLib
+[Guids]
+ gEfiEventVirtualAddressChangeGuid
+
[Protocols]
gEfiI2cMasterProtocolGuid ## CONSUMES
gDs1307RealTimeClockLibI2cMasterProtocolGuid ## CONSUMES
@@ -36,5 +39,7 @@
gDs1307RtcLibTokenSpaceGuid.PcdI2cSlaveAddress
gDs1307RtcLibTokenSpaceGuid.PcdI2cBusFrequency
+# 2.15 EDK II INF, .. the generic (i.e depex).. are not permitted
+# yet it ANDs this into the parent's depex
[Depex]
- gDs1307RealTimeClockLibI2cMasterProtocolGuid
+ gDs1307RealTimeClockLibI2cMasterProtocolGuid AND gEfiI2cMasterProtocolGuid
--
2.43.0
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^ permalink raw reply related [flat|nested] 7+ messages in thread* [edk2-devel] [RFC 5/6] Platform/RasberryPi: Add I2C1 to uefi runtime memory map
2024-01-11 0:04 [edk2-devel] [RFC 0/6] RasberryPi: RTC HAT support Jeremy Linton
` (3 preceding siblings ...)
2024-01-11 0:04 ` [edk2-devel] [RFC 4/6] Silicon/Maxim: Fix runtime issues Jeremy Linton
@ 2024-01-11 0:04 ` Jeremy Linton
2024-01-11 0:04 ` [edk2-devel] [RFC 6/6] Platform/RaspberryPi: Add menu and build options for HW RTC Jeremy Linton
5 siblings, 0 replies; 7+ messages in thread
From: Jeremy Linton @ 2024-01-11 0:04 UTC (permalink / raw)
To: devel; +Cc: ardb+tianocore, quic_llindhol, Jeremy Linton
We intend to allow the OS to update the RTC after exit boot services.
THis means we need to assure that the I2C IO map is marked correctly.
Signed-off-by: Jeremy Linton <jeremy.linton@arm.com>
---
Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.c b/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.c
index 377ef438ff..fec8f63ea8 100644
--- a/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.c
+++ b/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.c
@@ -505,6 +505,7 @@ ApplyVariables (
}
if (mModelFamily == 4) {
+ // add memoryspaces for the runtime flash/variable store
Status = gDS->AddMemorySpace (EfiGcdMemoryTypeMemoryMappedIo, BCM2836_SPI0_BASE_ADDRESS,
SIZE_4KB, EFI_MEMORY_UC | EFI_MEMORY_RUNTIME);
ASSERT_EFI_ERROR (Status);
@@ -517,6 +518,13 @@ ApplyVariables (
Status = gDS->SetMemorySpaceAttributes (GPIO_BASE_ADDRESS,
SIZE_4KB, EFI_MEMORY_UC|EFI_MEMORY_RUNTIME);
+ // add memoryspace for the runtime rtc/i2c
+ Status = gDS->AddMemorySpace (EfiGcdMemoryTypeMemoryMappedIo, BCM2836_I2C1_BASE_ADDRESS,
+ SIZE_4KB, EFI_MEMORY_UC | EFI_MEMORY_RUNTIME);
+ ASSERT_EFI_ERROR (Status);
+ Status = gDS->SetMemorySpaceAttributes (BCM2836_I2C1_BASE_ADDRESS,
+ SIZE_4KB, EFI_MEMORY_UC|EFI_MEMORY_RUNTIME);
+
ASSERT_EFI_ERROR (Status);
}
--
2.43.0
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^ permalink raw reply related [flat|nested] 7+ messages in thread* [edk2-devel] [RFC 6/6] Platform/RaspberryPi: Add menu and build options for HW RTC
2024-01-11 0:04 [edk2-devel] [RFC 0/6] RasberryPi: RTC HAT support Jeremy Linton
` (4 preceding siblings ...)
2024-01-11 0:04 ` [edk2-devel] [RFC 5/6] Platform/RasberryPi: Add I2C1 to uefi runtime memory map Jeremy Linton
@ 2024-01-11 0:04 ` Jeremy Linton
5 siblings, 0 replies; 7+ messages in thread
From: Jeremy Linton @ 2024-01-11 0:04 UTC (permalink / raw)
To: devel; +Cc: ardb+tianocore, quic_llindhol, Jeremy Linton
Now that the i2c drivers, config setup, and DS1307 driver are
in place, lets add the drivers to the build. We also add a menu
item to enable/disable it since the device I have:
https://www.amazon.com/Makerfire%C2%AE-Raspberry-Module-DS1307-Battery/dp/B00ZOXWHK4
Doesn't utilize the HAT protocol so it cannot be detected.
Signed-off-by: Jeremy Linton <jeremy.linton@arm.com>
---
.../RaspberryPi/Drivers/ConfigDxe/ConfigDxe.c | 22 ++++++++++++++
.../Drivers/ConfigDxe/ConfigDxe.inf | 1 +
.../Drivers/ConfigDxe/ConfigDxeHii.uni | 6 ++++
.../Drivers/ConfigDxe/ConfigDxeHii.vfr | 16 ++++++++++
Platform/RaspberryPi/Include/ConfigVars.h | 4 +++
Platform/RaspberryPi/RPi3/RPi3.dsc | 7 +++++
Platform/RaspberryPi/RPi4/RPi4.dsc | 30 +++++++++++++++++++
Platform/RaspberryPi/RPi4/RPi4.fdf | 19 ++++++++++++
Platform/RaspberryPi/RaspberryPi.dec | 2 ++
9 files changed, 107 insertions(+)
diff --git a/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.c b/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.c
index fec8f63ea8..0397941a06 100644
--- a/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.c
+++ b/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.c
@@ -319,6 +319,16 @@ SetupVariables (
ASSERT_EFI_ERROR (Status);
}
+ Size = sizeof (UINT32);
+ Status = gRT->GetVariable (L"HwRtc",
+ &gConfigDxeFormSetGuid,
+ NULL, &Size, &Var32);
+ if (EFI_ERROR (Status)) {
+ Status = PcdSet32S (PcdHwRtc, PcdGet32 (PcdHwRtc));
+ ASSERT_EFI_ERROR (Status);
+ }
+
+
} else {
/*
* Disable PCIe and XHCI
@@ -716,6 +726,18 @@ ApplyVariables (
GpioPinFuncSet (33, GPIO_FSEL_ALT3);
}
+ // Assure I2C1 is selected on header
+ if (PcdGet32 (PcdHwRtc)) {
+ UINT32 ClockRate;
+ DEBUG ((DEBUG_INFO, "Enable SDA1\n"));
+ GpioPinFuncSet (2, GPIO_FSEL_ALT0);
+ GpioPinFuncSet (3, GPIO_FSEL_ALT0);
+
+ mFwProtocol->GetClockRate (RPI_MBOX_CLOCK_RATE_CORE, &ClockRate);
+ ClockRate/=50000; //50Khz slow it down a bit initially
+
+ MmioWrite32 (BCM2836_I2C1_OFFSET + BCM2836_SOC_REGISTERS + BCM2835_I2C_DIV, ClockRate ); //was 5dc which assumes a 150Mhz clock, when we are usually at 500Mhz?
+ }
}
diff --git a/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.inf b/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.inf
index e422e5ba5c..4c213174ce 100644
--- a/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.inf
+++ b/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.inf
@@ -98,6 +98,7 @@
gRaspberryPiTokenSpaceGuid.PcdMiniUartClockRate
gRaspberryPiTokenSpaceGuid.PcdXhciReload
gRaspberryPiTokenSpaceGuid.PcdEnableGpio
+ gRaspberryPiTokenSpaceGuid.PcdHwRtc
[Depex]
gPcdProtocolGuid AND gRaspberryPiFirmwareProtocolGuid
diff --git a/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxeHii.uni b/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxeHii.uni
index fb06d46a61..8da143d519 100644
--- a/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxeHii.uni
+++ b/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxeHii.uni
@@ -72,6 +72,12 @@
#string STR_ADVANCED_ENABLEGPIO_DISABLE #language en-US "Disabled"
#string STR_ADVANCED_ENABLEGPIO_ENABLE #language en-US "Enable"
+#string STR_ADVANCED_ENABLEHWRTC_PROMPT #language en-US "Enable Hardware RTC"
+#string STR_ADVANCED_ENABLEHWRTC_HELP #language en-US "A DS1307 hardware real time clock is attached on I2C1."
+#string STR_ADVANCED_ENABLEHWRTC_DISABLE #language en-US "Disabled"
+#string STR_ADVANCED_ENABLEHWRTC_ENABLE #language en-US "Enable"
+
+
#string STR_ADVANCED_ASSET_TAG_PROMPT #language en-US "Asset Tag"
#string STR_ADVANCED_ASSET_TAG_HELP #language en-US "Set the system Asset Tag"
diff --git a/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxeHii.vfr b/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxeHii.vfr
index 04eb0a15a2..b7146b7e8c 100644
--- a/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxeHii.vfr
+++ b/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxeHii.vfr
@@ -71,6 +71,11 @@ formset
name = EnableGpio,
guid = CONFIGDXE_FORM_SET_GUID;
+ efivarstore ADVANCED_ENABLEHWRTC_VARSTORE_DATA,
+ attribute = EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_NON_VOLATILE,
+ name = HwRtc,
+ guid = CONFIGDXE_FORM_SET_GUID;
+
efivarstore SYSTEM_TABLE_MODE_VARSTORE_DATA,
attribute = EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_NON_VOLATILE,
name = SystemTableMode,
@@ -259,6 +264,17 @@ formset
option text = STRING_TOKEN(STR_ADVANCED_ENABLEGPIO_ENABLE), value = 1, flags = 0;
endoneof;
endif;
+
+ grayoutif ideqval SystemTableMode.Mode == SYSTEM_TABLE_MODE_DT;
+ oneof varid = HwRtc.Value,
+ prompt = STRING_TOKEN(STR_ADVANCED_ENABLEHWRTC_PROMPT),
+ help = STRING_TOKEN(STR_ADVANCED_ENABLEHWRTC_HELP),
+ flags = NUMERIC_SIZE_4 | INTERACTIVE | RESET_REQUIRED,
+ option text = STRING_TOKEN(STR_ADVANCED_ENABLEHWRTC_DISABLE), value = 0, flags = DEFAULT;
+ option text = STRING_TOKEN(STR_ADVANCED_ENABLEHWRTC_ENABLE), value = 1, flags = 0;
+ endoneof;
+ endif;
+
#endif
string varid = AssetTag.AssetTag,
prompt = STRING_TOKEN(STR_ADVANCED_ASSET_TAG_PROMPT),
diff --git a/Platform/RaspberryPi/Include/ConfigVars.h b/Platform/RaspberryPi/Include/ConfigVars.h
index 43a39891d4..69dda96051 100644
--- a/Platform/RaspberryPi/Include/ConfigVars.h
+++ b/Platform/RaspberryPi/Include/ConfigVars.h
@@ -84,6 +84,10 @@ typedef struct {
UINT32 Value;
} ADVANCED_ENABLEGPIO_VARSTORE_DATA;
+typedef struct {
+ UINT32 Value;
+} ADVANCED_ENABLEHWRTC_VARSTORE_DATA;
+
typedef struct {
#define SYSTEM_TABLE_MODE_ACPI 0
#define SYSTEM_TABLE_MODE_BOTH 1
diff --git a/Platform/RaspberryPi/RPi3/RPi3.dsc b/Platform/RaspberryPi/RPi3/RPi3.dsc
index 55da7d5870..10d57c5e03 100644
--- a/Platform/RaspberryPi/RPi3/RPi3.dsc
+++ b/Platform/RaspberryPi/RPi3/RPi3.dsc
@@ -541,6 +541,13 @@
#
gRaspberryPiTokenSpaceGuid.PcdEnableGpio|L"EnableGpio"|gConfigDxeFormSetGuid|0x0|1
+ # Utilize RTC on I2C1
+ #
+ # 0 - No
+ # 1 - Yes
+ #
+ gRaspberryPiTokenSpaceGuid.PcdHwRtc|L"HwRtc"|gConfigDxeFormSetGuid|0x0|0
+
#
# Common UEFI ones.
#
diff --git a/Platform/RaspberryPi/RPi4/RPi4.dsc b/Platform/RaspberryPi/RPi4/RPi4.dsc
index a49b3433ac..170e45ae7e 100644
--- a/Platform/RaspberryPi/RPi4/RPi4.dsc
+++ b/Platform/RaspberryPi/RPi4/RPi4.dsc
@@ -368,6 +368,12 @@
# Default platform supported RFC 4646 languages: (American) English
gEfiMdePkgTokenSpaceGuid.PcdUefiVariableDefaultPlatformLangCodes|"en-US"
+ #
+ # RTC Pcds
+ #
+ gDs1307RtcLibTokenSpaceGuid.PcdI2cSlaveAddress|0x68
+ gDs1307RtcLibTokenSpaceGuid.PcdI2cBusFrequency|100000
+
[LibraryClasses.common]
ArmLib|ArmPkg/Library/ArmLib/ArmBaseLib.inf
ArmMmuLib|ArmPkg/Library/ArmMmuLib/ArmMmuBaseLib.inf
@@ -562,6 +568,14 @@
#
gRaspberryPiTokenSpaceGuid.PcdEnableGpio|L"EnableGpio"|gConfigDxeFormSetGuid|0x0|0
+ # Utilize RTC on I2C1
+ #
+ # 0 - No
+ # 1 - Yes
+ #
+ gRaspberryPiTokenSpaceGuid.PcdHwRtc|L"HwRtc"|gConfigDxeFormSetGuid|0x0|0
+
+
#
# Common UEFI ones.
#
@@ -659,6 +673,15 @@
<LibraryClasses>
RealTimeClockLib|EmbeddedPkg/Library/VirtualRealTimeClockLib/VirtualRealTimeClockLib.inf
}
+ # Oh, confusing, we now have two runtime variable support drivers...
+ # Do the virtual one by default, but if the hardware RTC is configured then
+ # SOM the BcmI2CPlatform driver, which activates this one.
+ EmbeddedPkg/RealTimeClockRuntimeDxe/RealTimeClockRuntimeDxe.inf {
+ <Defines>
+ FILE_GUID = 9d539f19-5fb6-4088-a81d-aaeb90446751
+ <LibraryClasses>
+ RealTimeClockLib|Silicon/Maxim/Library/Ds1307RtcLib/Ds1307RtcLib.inf
+ }
EmbeddedPkg/MetronomeDxe/MetronomeDxe.inf
MdeModulePkg/Universal/Console/ConPlatformDxe/ConPlatformDxe.inf
@@ -782,6 +805,13 @@
MdeModulePkg/Bus/Pci/NvmExpressDxe/NvmExpressDxe.inf
#
+ # RTC support
+ #
+ Platform/RaspberryPi/Drivers/BcmI2CPlatform/BcmI2CPlatform.inf
+ Silicon/Maxim/Library/Ds1307RtcLib/Ds1307RtcLib.inf
+ Silicon/Broadcom/Drivers/I2cDxe/I2cDxe.inf
+
+
# UEFI application (Shell Embedded Boot Loader)
#
ShellPkg/Application/Shell/Shell.inf {
diff --git a/Platform/RaspberryPi/RPi4/RPi4.fdf b/Platform/RaspberryPi/RPi4/RPi4.fdf
index 8169277615..989d99a49f 100644
--- a/Platform/RaspberryPi/RPi4/RPi4.fdf
+++ b/Platform/RaspberryPi/RPi4/RPi4.fdf
@@ -288,6 +288,17 @@ READ_LOCK_STATUS = TRUE
#
INF MdeModulePkg/Bus/Pci/NvmExpressDxe/NvmExpressDxe.inf
+ #
+ # I2C/RTC
+ #
+ INF Platform/RaspberryPi/Drivers/BcmI2CPlatform/BcmI2CPlatform.inf
+ INF Silicon/Broadcom/Drivers/I2cDxe/I2cDxe.inf
+ INF RuleOverride = RTC_RUNTIME EmbeddedPkg/RealTimeClockRuntimeDxe/RealTimeClockRuntimeDxe.inf
+# FILE DRIVER = 9d539f19-5fb6-4088-a81d-aaeb90446751 {
+# SECTION PE32 = EmbeddedPkg/RealTimeClockRuntimeDxe/RealTimeClockRuntimeDxe.inf
+# SECTION PE32 = $(INF_OUTPUT)Build/RPi4/DEBUG_GCC5/AARCH64/RealTimeClock_9d539f19-5fb6-4088-a81d-aaeb90446751.efi
+# }
+
#
# SCSI Bus and Disk Driver
#
@@ -415,6 +426,14 @@ READ_LOCK_STATUS = TRUE
UI STRING="$(MODULE_NAME)" Optional
}
+[Rule.Common.DXE_RUNTIME_DRIVER.RTC_RUNTIME]
+ FILE DRIVER = 9d539f19-5fb6-4088-a81d-aaeb90446751 {
+ DXE_DEPEX DXE_DEPEX Optional $(INF_OUTPUT)/../../9d539f19-5fb6-4088-a81d-aaeb90446751/OUTPUT/$(MODULE_NAME).depex
+ PE32 PE32 $(INF_OUTPUT)/../../9d539f19-5fb6-4088-a81d-aaeb90446751/OUTPUT/$(MODULE_NAME).efi
+ UI STRING="$(MODULE_NAME)" Optional
+ }
+
+
[Rule.Common.UEFI_APPLICATION]
FILE APPLICATION = $(NAMED_GUID) {
UI STRING ="$(MODULE_NAME)" Optional
diff --git a/Platform/RaspberryPi/RaspberryPi.dec b/Platform/RaspberryPi/RaspberryPi.dec
index cc56b436cf..9cf33c366b 100644
--- a/Platform/RaspberryPi/RaspberryPi.dec
+++ b/Platform/RaspberryPi/RaspberryPi.dec
@@ -26,6 +26,7 @@
gRaspberryPiTokenSpaceGuid = {0xCD7CC258, 0x31DB, 0x11E6, {0x9F, 0xD3, 0x63, 0xB0, 0xB8, 0xEE, 0xD6, 0xB5}}
gRaspberryPiEventResetGuid = {0xCD7CC258, 0x31DB, 0x11E6, {0x9F, 0xD3, 0x63, 0xB4, 0xB4, 0xE4, 0xD4, 0xB4}}
gConfigDxeFormSetGuid = {0xCD7CC258, 0x31DB, 0x22E6, {0x9F, 0x22, 0x63, 0xB0, 0xB8, 0xEE, 0xD6, 0xB5}}
+ gBcmNonDiscoverableI2cMasterGuid = { 0x16066c21, 0x0ca6, 0x4f44, {0x82, 0xd9, 0xbe, 0x06, 0x96, 0x12, 0x0e, 0xfb}}
[PcdsFixedAtBuild.common]
#
@@ -75,3 +76,4 @@
gRaspberryPiTokenSpaceGuid.PcdMiniUartClockRate|0|UINT32|0x00000023
gRaspberryPiTokenSpaceGuid.PcdXhciReload|0|UINT32|0x00000024
gRaspberryPiTokenSpaceGuid.PcdEnableGpio|0|UINT32|0x00000025
+ gRaspberryPiTokenSpaceGuid.PcdHwRtc|0|UINT32|0x00000026
--
2.43.0
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^ permalink raw reply related [flat|nested] 7+ messages in thread