board/emk/top5200/top5200.c

   1 /*
   2  * (C) Copyright 2003
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * (C) Copyright 2003
   6  * Reinhard Meyer, EMK Elektronik GmbH, r.meyer@emk-elektronik.de
   7  *
   8  * SPDX-License-Identifier:     GPL-2.0+
   9  */
  10
  11 #include <common.h>
  12 #include <mpc5xxx.h>
  13 #include <pci.h>
  14
  15 /*****************************************************************************
  16  * initialize SDRAM/DDRAM controller.
  17  * TBD: get data from I2C EEPROM
  18  *****************************************************************************/
  19 phys_size_t initdram (int board_type)
  20 {
  21         ulong dramsize = 0;
  22 #ifndef CONFIG_SYS_RAMBOOT
  23 #if 0
  24         ulong   t;
  25         ulong   tap_del;
  26 #endif
  27
  28         #define MODE_EN         0x80000000
  29         #define SOFT_PRE        2
  30         #define SOFT_REF        4
  31
  32         /* configure SDRAM start/end */
  33         *(vu_long *)MPC5XXX_SDRAM_CS0CFG = (CONFIG_SYS_SDRAM_BASE & 0xFFF00000) | CONFIG_SYS_DRAM_RAM_SIZE;
  34         *(vu_long *)MPC5XXX_SDRAM_CS1CFG = 0x80000000;  /* disabled */
  35
  36         /* setup config registers */
  37         *(vu_long *)MPC5XXX_SDRAM_CONFIG1 = CONFIG_SYS_DRAM_CONFIG1;
  38         *(vu_long *)MPC5XXX_SDRAM_CONFIG2 = CONFIG_SYS_DRAM_CONFIG2;
  39
  40         /* unlock mode register */
  41         *(vu_long *)MPC5XXX_SDRAM_CTRL = CONFIG_SYS_DRAM_CONTROL | MODE_EN;
  42         /* precharge all banks */
  43         *(vu_long *)MPC5XXX_SDRAM_CTRL = CONFIG_SYS_DRAM_CONTROL | MODE_EN | SOFT_PRE;
  44 #ifdef CONFIG_SYS_DRAM_DDR
  45         /* set extended mode register */
  46         *(vu_short *)MPC5XXX_SDRAM_MODE = CONFIG_SYS_DRAM_EMODE;
  47 #endif
  48         /* set mode register */
  49         *(vu_short *)MPC5XXX_SDRAM_MODE = CONFIG_SYS_DRAM_MODE | 0x0400;
  50         /* precharge all banks */
  51         *(vu_long *)MPC5XXX_SDRAM_CTRL = CONFIG_SYS_DRAM_CONTROL | MODE_EN | SOFT_PRE;
  52         /* auto refresh */
  53         *(vu_long *)MPC5XXX_SDRAM_CTRL = CONFIG_SYS_DRAM_CONTROL | MODE_EN | SOFT_REF;
  54         /* set mode register */
  55         *(vu_short *)MPC5XXX_SDRAM_MODE = CONFIG_SYS_DRAM_MODE;
  56         /* normal operation */
  57         *(vu_long *)MPC5XXX_SDRAM_CTRL = CONFIG_SYS_DRAM_CONTROL;
  58         /* write default TAP delay */
  59         *(vu_long *)MPC5XXX_CDM_PORCFG = CONFIG_SYS_DRAM_TAP_DEL << 24;
  60
  61 #if 0
  62         for (tap_del = 0; tap_del < 32; tap_del++)
  63         {
  64                 *(vu_long *)MPC5XXX_CDM_PORCFG = tap_del << 24;
  65
  66                 printf ("\nTAP Delay:%x Filling DRAM...", *(vu_long *)MPC5XXX_CDM_PORCFG);
  67                 for (t = 0; t < 0x04000000; t+=4)
  68                         *(vu_long *) t = t;
  69                 printf ("Checking DRAM...\n");
  70                 for (t = 0; t < 0x04000000; t+=4)
  71                 {
  72                         ulong   rval = *(vu_long *) t;
  73                         if (rval != t)
  74                         {
  75                                 printf ("mismatch at %x: ", t);
  76                                 printf (" 1.read %x", rval);
  77                                 printf (" 2.read %x", *(vu_long *) t);
  78                                 printf (" 3.read %x", *(vu_long *) t);
  79                                 break;
  80                         }
  81                 }
  82         }
  83 #endif
  84 #endif /* CONFIG_SYS_RAMBOOT */
  85
  86         dramsize = ((1 << (*(vu_long *)MPC5XXX_SDRAM_CS0CFG - 0x13)) << 20);
  87
  88         /* return total ram size */
  89         return dramsize;
  90 }
  91
  92 /*****************************************************************************
  93  * print board identification
  94  *****************************************************************************/
  95 int checkboard (void)
  96 {
  97 #if defined (CONFIG_EVAL5200)
  98         puts ("Board: EMK TOP5200 on EVAL5200\n");
  99 #else
 100 #if defined (CONFIG_LITE5200)
 101         puts ("Board: LITE5200\n");
 102 #else
 103 #if defined (CONFIG_MINI5200)
 104         puts ("Board: EMK TOP5200 on MINI5200\n");
 105 #else
 106         puts ("Board: EMK TOP5200\n");
 107 #endif
 108 #endif
 109 #endif
 110         return 0;
 111 }
 112
 113 /*****************************************************************************
 114  * prepare for FLASH detection
 115  *****************************************************************************/
 116 void flash_preinit(void)
 117 {
 118         /*
 119          * Now, when we are in RAM, enable flash write
 120          * access for detection process.
 121          * Note that CS_BOOT cannot be cleared when
 122          * executing in flash.
 123          */
 124         *(vu_long *)MPC5XXX_BOOTCS_CFG &= ~0x1; /* clear RO */
 125 }
 126
 127 /*****************************************************************************
 128  * finalize FLASH setup
 129  *****************************************************************************/
 130 void flash_afterinit(uint bank, ulong start, ulong size)
 131 {
 132         if (bank == 0) { /* adjust mapping */
 133                 *(vu_long *)MPC5XXX_BOOTCS_START =
 134                 *(vu_long *)MPC5XXX_CS0_START = START_REG(start);
 135                 *(vu_long *)MPC5XXX_BOOTCS_STOP =
 136                 *(vu_long *)MPC5XXX_CS0_STOP = STOP_REG(start, size);
 137         }
 138 }
 139
 140 /*****************************************************************************
 141  * otherinits after RAM is there and we are relocated to RAM
 142  * note: though this is an int function, nobody cares for the result!
 143  *****************************************************************************/
 144 int misc_init_r (void)
 145 {
 146 #if !defined (CONFIG_LITE5200)
 147         /* read 'factory' part of EEPROM */
 148         extern void read_factory_r (void);
 149         read_factory_r ();
 150 #endif
 151         return (0);
 152 }
 153
 154 /*****************************************************************************
 155  * initialize the PCI system
 156  *****************************************************************************/
 157 #ifdef  CONFIG_PCI
 158 static struct pci_controller hose;
 159
 160 extern void pci_mpc5xxx_init(struct pci_controller *);
 161
 162 void pci_init_board(void)
 163 {
 164         pci_mpc5xxx_init(&hose);
 165 }
 166 #endif
 167
 168 /*****************************************************************************
 169  * provide the IDE Reset Function
 170  *****************************************************************************/
 171 #if defined(CONFIG_CMD_IDE) && defined(CONFIG_IDE_RESET)
 172
 173 void init_ide_reset (void)
 174 {
 175         debug ("init_ide_reset\n");
 176
 177         /* Configure PSC1_4 as GPIO output for ATA reset */
 178         *(vu_long *) MPC5XXX_WU_GPIO_ENABLE |= GPIO_PSC1_4;
 179         *(vu_long *) MPC5XXX_WU_GPIO_DIR    |= GPIO_PSC1_4;
 180 }
 181
 182 void ide_set_reset (int idereset)
 183 {
 184         debug ("ide_reset(%d)\n", idereset);
 185
 186         if (idereset) {
 187                 *(vu_long *) MPC5XXX_WU_GPIO_DATA_O &= ~GPIO_PSC1_4;
 188         } else {
 189                 *(vu_long *) MPC5XXX_WU_GPIO_DATA_O |=  GPIO_PSC1_4;
 190         }
 191 }
 192 #endif