BeagleBoardPkg/Library/BeagleBoardLib/BeagleBoard.c

   1 /** @file
   2 *
   3 *  Copyright (c) 2011-2012, ARM Limited. All rights reserved.
   4 *
   5 *  This program and the accompanying materials
   6 *  are licensed and made available under the terms and conditions of the BSD License
   7 *  which accompanies this distribution.  The full text of the license may be found at
   8 *  http://opensource.org/licenses/bsd-license.php
   9 *
  10 *  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11 *  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12 *
  13 **/
  14
  15 #include <Library/IoLib.h>
  16 #include <Library/ArmPlatformLib.h>
  17 #include <Library/DebugLib.h>
  18 #include <Library/PcdLib.h>
  19
  20 #include <Omap3530/Omap3530.h>
  21 #include <BeagleBoard.h>
  22
  23 VOID
  24 PadConfiguration (
  25   BEAGLEBOARD_REVISION Revision
  26   );
  27
  28 VOID
  29 ClockInit (
  30   VOID
  31   );
  32
  33 /**
  34   Detect board revision
  35
  36   @return Board revision
  37 **/
  38 BEAGLEBOARD_REVISION
  39 BeagleBoardGetRevision (
  40   VOID
  41   )
  42 {
  43   UINT32 OldPinDir;
  44   UINT32 Revision;
  45
  46   // Read GPIO 171, 172, 173
  47   OldPinDir = MmioRead32 (GPIO6_BASE + GPIO_OE);
  48   MmioWrite32(GPIO6_BASE + GPIO_OE, (OldPinDir | BIT11 | BIT12 | BIT13));
  49   Revision = MmioRead32 (GPIO6_BASE + GPIO_DATAIN);
  50
  51   // Restore I/O settings
  52   MmioWrite32 (GPIO6_BASE + GPIO_OE, OldPinDir);
  53
  54   return (BEAGLEBOARD_REVISION)((Revision >> 11) & 0x7);
  55 }
  56
  57 /**
  58   Return the current Boot Mode
  59
  60   This function returns the boot reason on the platform
  61
  62 **/
  63 EFI_BOOT_MODE
  64 ArmPlatformGetBootMode (
  65   VOID
  66   )
  67 {
  68   return BOOT_WITH_FULL_CONFIGURATION;
  69 }
  70
  71 /**
  72   Initialize controllers that must setup at the early stage
  73
  74   Some peripherals must be initialized in Secure World.
  75   For example, some L2x0 requires to be initialized in Secure World
  76
  77 **/
  78 RETURN_STATUS
  79 ArmPlatformInitialize (
  80   IN  UINTN                     MpId
  81   )
  82 {
  83   BEAGLEBOARD_REVISION Revision;
  84
  85   Revision = BeagleBoardGetRevision();
  86
  87   // Set up Pin muxing.
  88   PadConfiguration (Revision);
  89
  90   // Set up system clocking
  91   ClockInit ();
  92
  93   // Turn off the functional clock for Timer 3
  94   MmioAnd32 (CM_FCLKEN_PER, 0xFFFFFFFF ^ CM_ICLKEN_PER_EN_GPT3_ENABLE );
  95   ArmDataSyncronizationBarrier ();
  96
  97   // Clear IRQs
  98   MmioWrite32 (INTCPS_CONTROL, INTCPS_CONTROL_NEWIRQAGR);
  99   ArmDataSyncronizationBarrier ();
 100
 101   return RETURN_SUCCESS;
 102 }
 103
 104 /**
 105   Initialize the system (or sometimes called permanent) memory
 106
 107   This memory is generally represented by the DRAM.
 108
 109 **/
 110 VOID
 111 ArmPlatformInitializeSystemMemory (
 112   VOID
 113   )
 114 {
 115   // We do not need to initialize the System Memory on RTSM
 116 }