board/freescale/m5208evbe/m5208evbe.c

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