/** @file
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*
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* Copyright (c) 2015, Linaro Limited. All rights reserved.
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* Copyright (c) 2017, Rockchip Inc. All rights reserved.
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*
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* This program and the accompanying materials
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* are licensed and made available under the terms and conditions of the BSD License
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* which accompanies this distribution. The full text of the license may be found at
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* http://opensource.org/licenses/bsd-license.php
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*
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* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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*
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**/
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#include <PiDxe.h>
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#include <Library/DebugLib.h>
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#include <Library/UefiBootServicesTableLib.h>
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#include <Library/ArmLib.h>
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#include <Library/BaseLib.h>
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#include <Library/TimerLib.h>
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#include <Library/IoLib.h>
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#include <Library/UefiRuntimeLib.h>
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#include <Library/DxeServicesTableLib.h>
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#include <Guid/EventGroup.h>
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#include <Library/I2CLib.h>
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#include <Rk3399/Rk3399.h>
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STATIC EFI_EVENT mI2cLibVirtualAddrChangeEvent;
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struct RkI2CInfo RkI2CDev[I2C_BUS_MAX] = {
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{ .Regs = (UINT32)RK3399_I2C0_BASE, 0},
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{ .Regs = (UINT32)RK3399_I2C1_BASE, 0},
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{ .Regs = (UINT32)RK3399_I2C2_BASE, 0},
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{ .Regs = (UINT32)RK3399_I2C3_BASE, 0},
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{ .Regs = (UINT32)RK3399_I2C4_BASE, 0},
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{ .Regs = (UINT32)RK3399_I2C5_BASE, 0},
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{ .Regs = (UINT32)RK3399_I2C6_BASE, 0},
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{ .Regs = (UINT32)RK3399_I2C7_BASE, 0}
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};
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STATIC UINTN gI2cRuntimeBase[I2C_BUS_MAX] = {0};
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void *RkI2CGetBase(enum RkI2CBusID BusId)
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{
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if (BusId >= I2C_BUS_MAX) {
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DEBUG ((EFI_D_ERROR, "I2C bus error, PLS set i2c bus first!\n"));
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return (void *)NULL;
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}
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if (RkI2CDev[BusId].Regs == 0) {
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DEBUG ((EFI_D_ERROR, "I2C base register error, PLS check i2c config!\n"));
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return (void *)NULL;
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}
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if (gI2cRuntimeBase[BusId] != 0) {
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RkI2CDev[BusId].Regs = gI2cRuntimeBase[BusId];
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}
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return (void *)&RkI2CDev[BusId];
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}
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VOID
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EFIAPI
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RkI2cLibVirtualNotifyEvent (
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IN EFI_EVENT Event,
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IN VOID *Context
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)
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{
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UINT32 BusId;
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for (BusId = 0; BusId < I2C_BUS_MAX; BusId++) {
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if (gI2cRuntimeBase[BusId] != 0) {
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EfiConvertPointer (0x0, (VOID **)&gI2cRuntimeBase[BusId]);
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DEBUG ((EFI_D_INFO, "I2cLibVirtualNotifyEvent: gI2cRuntimeBase[%d]=0x%x\n", BusId, gI2cRuntimeBase[BusId]));
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}
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}
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return;
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}
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EFI_STATUS
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RkI2cLibRuntimeSetup(enum RkI2CBusID BusId)
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{
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EFI_STATUS Status;
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struct RkI2CInfo *I2CInfo = (struct RkI2CInfo *)RkI2CGetBase(BusId);
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gI2cRuntimeBase[BusId] = I2CInfo->Regs;
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// Declare the controller as EFI_MEMORY_RUNTIME
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Status = gDS->AddMemorySpace (
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EfiGcdMemoryTypeMemoryMappedIo,
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gI2cRuntimeBase[BusId], SIZE_64KB,
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EFI_MEMORY_UC | EFI_MEMORY_RUNTIME
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);
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if (EFI_ERROR (Status)) {
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DEBUG ((EFI_D_WARN, "[%a:%d] AddMemorySpace failed: %r\n", __FUNCTION__, __LINE__, Status));
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}
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Status = gDS->SetMemorySpaceAttributes (gI2cRuntimeBase[BusId], SIZE_64KB, EFI_MEMORY_UC | EFI_MEMORY_RUNTIME);
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if (EFI_ERROR (Status)) {
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DEBUG ((EFI_D_ERROR, "[%a:%d] SetMemorySpaceAttributes failed: %r\n", __FUNCTION__, __LINE__, Status));
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return Status;
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}
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//
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// Register for the virtual address change event
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//
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// Only create event once
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if (mI2cLibVirtualAddrChangeEvent == NULL) {
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Status = gBS->CreateEventEx (
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EVT_NOTIFY_SIGNAL,
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TPL_NOTIFY,
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RkI2cLibVirtualNotifyEvent,
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NULL,
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&gEfiEventVirtualAddressChangeGuid,
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&mI2cLibVirtualAddrChangeEvent
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);
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if (EFI_ERROR (Status)) {
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DEBUG ((EFI_D_ERROR, "[%a:%d] Create event failed: %r\n", __FUNCTION__, __LINE__, Status));
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return Status;
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}
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}
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return EFI_SUCCESS;
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}
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