board/freescale/m5208evbe/m5208evbe.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2000-2003
   4  * Wolfgang Denk, DENX Software Engineering, [email protected].
   5  *
   6  * Copyright (C) 2004-2008, 2012 Freescale Semiconductor, Inc.
   7  * TsiChung Liew ([email protected])
   8  */
   9
  10 #include <config.h>
  11 #include <common.h>
  12 #include <init.h>
  13 #include <asm/global_data.h>
  14 #include <asm/immap.h>
  15 #include <asm/io.h>
  16 #include <linux/delay.h>
  17
  18 DECLARE_GLOBAL_DATA_PTR;
  19
  20 int checkboard(void)
  21 {
  22         puts("Board: ");
  23         puts("Freescale M5208EVBe\n");
  24         return 0;
  25 };
  26
  27 int dram_init(void)
  28 {
  29         sdram_t *sdram = (sdram_t *)(MMAP_SDRAM);
  30         u32 dramsize, i;
  31
  32         dramsize = CONFIG_SYS_SDRAM_SIZE * 0x100000;
  33
  34         for (i = 0x13; i < 0x20; i++) {
  35                 if (dramsize == (1 << i))
  36                         break;
  37         }
  38         i--;
  39
  40         out_be32(&sdram->cs0, CONFIG_SYS_SDRAM_BASE | i);
  41 #ifdef CONFIG_SYS_SDRAM_BASE1
  42         out_be32(&sdram->cs1, CONFIG_SYS_SDRAM_BASE | i);
  43 #endif
  44         out_be32(&sdram->cfg1, CONFIG_SYS_SDRAM_CFG1);
  45         out_be32(&sdram->cfg2, CONFIG_SYS_SDRAM_CFG2);
  46
  47         udelay(500);
  48
  49         /* Issue PALL */
  50         out_be32(&sdram->ctrl, CONFIG_SYS_SDRAM_CTRL | 2);
  51         asm("nop");
  52
  53         /* Perform two refresh cycles */
  54         out_be32(&sdram->ctrl, CONFIG_SYS_SDRAM_CTRL | 4);
  55         out_be32(&sdram->ctrl, CONFIG_SYS_SDRAM_CTRL | 4);
  56         asm("nop");
  57
  58         /* Issue LEMR */
  59         out_be32(&sdram->mode, CONFIG_SYS_SDRAM_MODE);
  60         asm("nop");
  61         out_be32(&sdram->mode, CONFIG_SYS_SDRAM_EMOD);
  62         asm("nop");
  63
  64         out_be32(&sdram->ctrl, CONFIG_SYS_SDRAM_CTRL | 2);
  65         asm("nop");
  66
  67         out_be32(&sdram->ctrl,
  68                 (CONFIG_SYS_SDRAM_CTRL & ~0x80000000) | 0x10000F00);
  69         asm("nop");
  70
  71         udelay(100);
  72
  73         gd->ram_size = dramsize;
  74
  75         return 0;
  76 };
  77
  78 int testdram(void)
  79 {
  80         /* TODO: XXX XXX XXX */
  81         printf("DRAM test not implemented!\n");
  82
  83         return (0);
  84 }