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ArmPlatformPkg: Introduce ArmPlatformSysConfigLib

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The purpose of this library is to create an interface to communicate
with the platform micro-controller.
It abstracts the communication protocol (eg: SPI, UART, etc) between
the application processor and the micro-controller.

ArmPlatformPkg/ArmVExpressPkg: Implement ArmPlaformSysConfigLib

This implementation allows to communicate with the microcontroller of the
Versatile Express motherboard.



git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11785 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
oliviermartin
2011-06-11 11:08:34 +00:00
parent 863be5d010
commit 7b80d1a3b6
5 changed files with 379 additions and 0 deletions
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255
ArmPlatformPkg/ArmVExpressPkg/Library/ArmVExpressSysConfigLib/ArmVExpressSysConfig.c Normal file
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/** @file SysCfgArmVExpress.c
Copyright (c) 2011, ARM Ltd. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include <PiDxe.h>
#include <Library/IoLib.h>
#include <Library/DebugLib.h>
#include <Library/ArmPlatformSysConfigLib.h>
#include <ArmPlatform.h>
//
// SYS_CFGCTRL Bits
//
#define SYS_CFGCTRL_START BIT31
#define SYS_CFGCTRL_READ (0 << 30)
#define SYS_CFGCTRL_WRITE (1 << 30)
#define SYS_CFGCTRL_FUNCTION(fun) (((fun ) & 0x3F) << 20)
#define SYS_CFGCTRL_SITE(site) (((site) & 0x3) << 16)
#define SYS_CFGCTRL_POSITION(pos) (((pos ) & 0xF) << 12)
#define SYS_CFGCTRL_DEVICE(dev) ((dev ) & 0xFFF)
//
// SYS_CFGSTAT Bits
//
#define SYS_CFGSTAT_ERROR BIT1
#define SYS_CFGSTAT_COMPLETE BIT0
/****************************************************************************
*
* This file makes it easier to access the System Configuration Registers
* in the ARM Versatile Express motherboard.
*
****************************************************************************/
EFI_STATUS
ArmPlatformSysConfigInitialize (
VOID
)
{
return EFI_SUCCESS;
}
/***************************************
* GENERAL FUNCTION: AccessSysCfgRegister
* Interacts with
* SYS_CFGSTAT
* SYS_CFGDATA
* SYS_CFGCTRL
* for setting and for reading out values
***************************************/
EFI_STATUS
AccessSysCfgRegister (
IN UINT32 ReadWrite,
IN UINT32 Function,
IN UINT32 Site,
IN UINT32 Position,
IN UINT32 Device,
IN OUT UINT32* Data
)
{
UINT32 SysCfgCtrl;
// Clear the COMPLETE bit
MmioAnd32(ARM_VE_SYS_CFGSTAT_REG, ~SYS_CFGSTAT_COMPLETE);
// If writing, then set the data value
if(ReadWrite == SYS_CFGCTRL_WRITE) {
MmioWrite32(ARM_VE_SYS_CFGDATA_REG, *Data);
}
// Set the control value
SysCfgCtrl = SYS_CFGCTRL_START | ReadWrite | SYS_CFGCTRL_FUNCTION(Function) | SYS_CFGCTRL_SITE(Site) |
SYS_CFGCTRL_POSITION(Position) | SYS_CFGCTRL_DEVICE(Device);
MmioWrite32(ARM_VE_SYS_CFGCTRL_REG, SysCfgCtrl);
// Wait until the COMPLETE bit is set
while ((MmioRead32(ARM_VE_SYS_CFGSTAT_REG) & SYS_CFGSTAT_COMPLETE) == 0);
// Check for errors
if(MmioRead32(ARM_VE_SYS_CFGSTAT_REG) & SYS_CFGSTAT_ERROR) {
return EFI_DEVICE_ERROR;
}
// If reading then get the data value
if(ReadWrite == SYS_CFGCTRL_READ) {
*Data = MmioRead32(ARM_VE_SYS_CFGDATA_REG);
}
return EFI_SUCCESS;
}
EFI_STATUS
ArmPlatformSysConfigGet (
IN SYS_CONFIG_FUNCTION Function,
OUT UINT32* Value
)
{
UINT32 Site;
UINT32 Position;
UINT32 Device;
Position = 0;
Device = 0;
// Intercept some functions
switch(Function) {
case SYS_CFG_OSC_SITE1:
Function = SYS_CFG_OSC;
Site = ARM_VE_DAUGHTERBOARD_1_SITE;
break;
case SYS_CFG_OSC_SITE2:
Function = SYS_CFG_OSC;
Site = ARM_VE_DAUGHTERBOARD_2_SITE;
break;
case SYS_CFG_MUXFPGA:
Site = *Value;
break;
case SYS_CFG_OSC:
case SYS_CFG_VOLT:
case SYS_CFG_AMP:
case SYS_CFG_TEMP:
case SYS_CFG_RESET:
case SYS_CFG_SCC:
case SYS_CFG_DVIMODE:
case SYS_CFG_POWER:
Site = ARM_VE_MOTHERBOARD_SITE;
break;
case SYS_CFG_SHUTDOWN:
case SYS_CFG_REBOOT:
case SYS_CFG_RTC:
default:
return EFI_UNSUPPORTED;
}
return AccessSysCfgRegister (SYS_CFGCTRL_READ, Function, Site, Position, Device, Value);
}
EFI_STATUS
ArmPlatformSysConfigSet (
IN SYS_CONFIG_FUNCTION Function,
IN UINT32 Value
)
{
UINT32 Site;
UINT32 Position;
UINT32 Device;
Position = 0;
Device = 0;
// Intercept some functions
switch(Function) {
case SYS_CFG_OSC_SITE1:
Function = SYS_CFG_OSC;
Site = ARM_VE_DAUGHTERBOARD_1_SITE;
break;
case SYS_CFG_OSC_SITE2:
Function = SYS_CFG_OSC;
Site = ARM_VE_DAUGHTERBOARD_2_SITE;
break;
case SYS_CFG_MUXFPGA:
Site = Value;
break;
case SYS_CFG_RESET:
case SYS_CFG_SCC:
case SYS_CFG_SHUTDOWN:
case SYS_CFG_REBOOT:
case SYS_CFG_DVIMODE:
case SYS_CFG_POWER:
Site = ARM_VE_MOTHERBOARD_SITE;
break;
case SYS_CFG_OSC:
case SYS_CFG_VOLT:
case SYS_CFG_AMP:
case SYS_CFG_TEMP:
case SYS_CFG_RTC:
default:
return(EFI_UNSUPPORTED);
}
return AccessSysCfgRegister (SYS_CFGCTRL_WRITE, Function, Site, Position, Device, &Value);
}
EFI_STATUS
ArmPlatformSysConfigSetDevice (
IN SYS_CONFIG_FUNCTION Function,
IN UINT32 Device,
IN UINT32 Value
)
{
UINT32 Site;
UINT32 Position;
Position = 0;
// Intercept some functions
switch(Function) {
case SYS_CFG_OSC_SITE1:
Function = SYS_CFG_OSC;
Site = ARM_VE_DAUGHTERBOARD_1_SITE;
break;
case SYS_CFG_OSC_SITE2:
Function = SYS_CFG_OSC;
Site = ARM_VE_DAUGHTERBOARD_2_SITE;
break;
case SYS_CFG_MUXFPGA:
Site = Value;
break;
case SYS_CFG_RTC:
return(EFI_UNSUPPORTED);
//break;
case SYS_CFG_OSC:
case SYS_CFG_VOLT:
case SYS_CFG_AMP:
case SYS_CFG_TEMP:
case SYS_CFG_RESET:
case SYS_CFG_SCC:
case SYS_CFG_SHUTDOWN:
case SYS_CFG_REBOOT:
case SYS_CFG_DVIMODE:
case SYS_CFG_POWER:
Site = ARM_VE_MOTHERBOARD_SITE;
break;
default:
return EFI_UNSUPPORTED;
}
return AccessSysCfgRegister (SYS_CFGCTRL_WRITE, Function, Site, Position, Device, &Value);
}