target/linux/at91-2.6/image/dfboot/src/init.c

   1 //*----------------------------------------------------------------------------
   2 //*         ATMEL Microcontroller Software Support  -  ROUSSET  -
   3 //*----------------------------------------------------------------------------
   4 //* The software is delivered "AS IS" without warranty or condition of any
   5 //* kind, either express, implied or statutory. This includes without
   6 //* limitation any warranty or condition with respect to merchantability or
   7 //* fitness for any particular purpose, or against the infringements of
   8 //* intellectual property rights of others.
   9 //*----------------------------------------------------------------------------
  10 //* File Name           : init.c
  11 //* Object              : Low level initialisations written in C
  12 //* Creation            : HIi   10/10/2003
  13 //*
  14 //*----------------------------------------------------------------------------
  15 #include "config.h"
  16 #include "AT91RM9200.h"
  17 #include "lib_AT91RM9200.h"
  18 #include "stdio.h"
  19
  20 //*----------------------------------------------------------------------------
  21 //* \fn    AT91F_DataAbort
  22 //* \brief This function reports an Abort
  23 //*----------------------------------------------------------------------------
  24 static void AT91F_SpuriousHandler()
  25 {
  26         puts("ISI");
  27         while (1);
  28 }
  29
  30
  31 //*----------------------------------------------------------------------------
  32 //* \fn    AT91F_DataAbort
  33 //* \brief This function reports an Abort
  34 //*----------------------------------------------------------------------------
  35 static void AT91F_DataAbort()
  36 {
  37         puts("IDA");
  38         while (1);
  39 }
  40
  41 //*----------------------------------------------------------------------------
  42 //* \fn    AT91F_FetchAbort
  43 //* \brief This function reports an Abort
  44 //*----------------------------------------------------------------------------
  45 static void AT91F_FetchAbort()
  46 {
  47         puts("IFA");
  48         while (1);
  49 }
  50
  51 //*----------------------------------------------------------------------------
  52 //* \fn    AT91F_UndefHandler
  53 //* \brief This function reports that no handler have been set for current IT
  54 //*----------------------------------------------------------------------------
  55 static void AT91F_UndefHandler()
  56 {
  57         puts("IUD");
  58         while (1);
  59 }
  60
  61
  62 //*--------------------------------------------------------------------------------------
  63 //* Function Name       : AT91F_InitSdram
  64 //* Object              : Initialize the SDRAM
  65 //* Input Parameters    :
  66 //* Output Parameters   :
  67 //*--------------------------------------------------------------------------------------
  68 static void AT91F_InitSdram()
  69 {
  70         int *pRegister;
  71
  72         //* Configure PIOC as peripheral (D16/D31)
  73
  74         AT91F_PIO_CfgPeriph(
  75                 AT91C_BASE_PIOC, // PIO controller base address
  76                 0xFFFF0030,
  77                 0
  78         );
  79
  80         //*Init SDRAM
  81         pRegister = (int *)0xFFFFFF98;
  82         *pRegister = 0x2188c155;
  83         pRegister = (int *)0xFFFFFF90;
  84         *pRegister = 0x2;
  85         pRegister = (int *)0x20000000;
  86         *pRegister = 0;
  87         pRegister = (int *)0xFFFFFF90;
  88         *pRegister = 0x4;
  89         pRegister = (int *)0x20000000;
  90         *pRegister = 0;
  91         *pRegister = 0;
  92         *pRegister = 0;
  93         *pRegister = 0;
  94         *pRegister = 0;
  95         *pRegister = 0;
  96         *pRegister = 0;
  97         *pRegister = 0;
  98         pRegister = (int *)0xFFFFFF90;
  99         *pRegister = 0x3;
 100         pRegister = (int *)0x20000080;
 101         *pRegister = 0;
 102
 103         pRegister = (int *)0xFFFFFF94;
 104         *pRegister = 0x2e0;
 105         pRegister = (int *)0x20000000;
 106         *pRegister = 0;
 107
 108         pRegister = (int *)0xFFFFFF90;
 109         *pRegister = 0x00;
 110         pRegister = (int *)0x20000000;
 111         *pRegister = 0;
 112 }
 113
 114
 115 //*----------------------------------------------------------------------------
 116 //* \fn    AT91F_InitFlash
 117 //* \brief This function performs low level HW initialization
 118 //*----------------------------------------------------------------------------
 119 static void AT91F_InitMemories()
 120 {
 121         int *pEbi = (int *)0xFFFFFF60;
 122
 123         //* Setup MEMC to support all connected memories (CS0 = FLASH; CS1=SDRAM)
 124         pEbi  = (int *)0xFFFFFF60;
 125         *pEbi = 0x00000002;
 126
 127         //* CS0 cs for flash
 128         pEbi  = (int *)0xFFFFFF70;
 129         *pEbi = 0x00003284;
 130
 131         AT91F_InitSdram();
 132 }
 133
 134
 135
 136 //*----------------------------------------------------------------------------
 137 //* \fn    AT91F_LowLevelInit
 138 //* \brief This function performs very low level HW initialization
 139 //*----------------------------------------------------------------------------
 140 void AT91F_LowLevelInit(void)
 141 {
 142         int i;
 143
 144         // Init Interrupt Controller
 145         AT91F_AIC_Open(
 146                 AT91C_BASE_AIC,          // pointer to the AIC registers
 147                 AT91C_AIC_BRANCH_OPCODE, // IRQ exception vector
 148                 AT91F_UndefHandler,      // FIQ exception vector
 149                 AT91F_UndefHandler,      // AIC default handler
 150                 AT91F_SpuriousHandler,   // AIC spurious handler
 151                 0);                      // Protect mode
 152
 153         // Perform 8 End Of Interrupt Command to make sýre AIC will not Lock out nIRQ
 154         for(i=0; i<8; i++)
 155                 AT91F_AIC_AcknowledgeIt(AT91C_BASE_AIC);
 156
 157         AT91F_AIC_SetExceptionVector((unsigned int *)0x0C, AT91F_FetchAbort);
 158         AT91F_AIC_SetExceptionVector((unsigned int *)0x10, AT91F_DataAbort);
 159         AT91F_AIC_SetExceptionVector((unsigned int *)0x4, AT91F_UndefHandler);
 160
 161         //Initialize SDRAM and Flash
 162         AT91F_InitMemories();
 163
 164 }
 165