board/freescale/m5373evb/m5373evb.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) 2004-2007, 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
  16 DECLARE_GLOBAL_DATA_PTR;
  17
  18 int checkboard(void)
  19 {
  20         puts("Board: ");
  21         puts("Freescale FireEngine 5373 EVB\n");
  22         return 0;
  23 };
  24
  25 int dram_init(void)
  26 {
  27         sdram_t *sdram = (sdram_t *)(MMAP_SDRAM);
  28         u32 dramsize, i;
  29
  30         dramsize = CONFIG_SYS_SDRAM_SIZE * 0x100000;
  31
  32         for (i = 0x13; i < 0x20; i++) {
  33                 if (dramsize == (1 << i))
  34                         break;
  35         }
  36         i--;
  37
  38         out_be32(&sdram->cs0, CONFIG_SYS_SDRAM_BASE | i);
  39         out_be32(&sdram->cfg1, CONFIG_SYS_SDRAM_CFG1);
  40         out_be32(&sdram->cfg2, CONFIG_SYS_SDRAM_CFG2);
  41
  42         /* Issue PALL */
  43         out_be32(&sdram->ctrl, CONFIG_SYS_SDRAM_CTRL | 2);
  44
  45         /* Issue LEMR */
  46         out_be32(&sdram->mode, CONFIG_SYS_SDRAM_EMOD);
  47         out_be32(&sdram->mode, CONFIG_SYS_SDRAM_MODE | 0x04000000);
  48
  49         udelay(500);
  50
  51         /* Issue PALL */
  52         out_be32(&sdram->ctrl, CONFIG_SYS_SDRAM_CTRL | 2);
  53
  54         /* Perform two refresh cycles */
  55         out_be32(&sdram->ctrl, CONFIG_SYS_SDRAM_CTRL | 4);
  56         out_be32(&sdram->ctrl, CONFIG_SYS_SDRAM_CTRL | 4);
  57
  58         out_be32(&sdram->mode, CONFIG_SYS_SDRAM_MODE);
  59
  60         out_be32(&sdram->ctrl,
  61                 (CONFIG_SYS_SDRAM_CTRL & ~0x80000000) | 0x10000c00);
  62
  63         udelay(100);
  64
  65         gd->ram_size = dramsize;
  66
  67         return 0;
  68 };
  69
  70 int testdram(void)
  71 {
  72         /* TODO: XXX XXX XXX */
  73         printf("DRAM test not implemented!\n");
  74
  75         return (0);
  76 }