board/freescale/m53017evb/m53017evb.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
  16 DECLARE_GLOBAL_DATA_PTR;
  17
  18 int checkboard(void)
  19 {
  20         puts("Board: ");
  21         puts("Freescale M53017EVB\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 #ifdef CONFIG_SYS_SDRAM_BASE1
  40         out_be32(&sdram->cs1, CONFIG_SYS_SDRAM_BASE | i);
  41 #endif
  42         out_be32(&sdram->cfg1, CONFIG_SYS_SDRAM_CFG1);
  43         out_be32(&sdram->cfg2, CONFIG_SYS_SDRAM_CFG2);
  44
  45         udelay(500);
  46
  47         /* Issue PALL */
  48         out_be32(&sdram->ctrl, CONFIG_SYS_SDRAM_CTRL | 2);
  49         asm("nop");
  50
  51         /* Perform two refresh cycles */
  52         out_be32(&sdram->ctrl, CONFIG_SYS_SDRAM_CTRL | 4);
  53         out_be32(&sdram->ctrl, CONFIG_SYS_SDRAM_CTRL | 4);
  54         asm("nop");
  55
  56         /* Issue LEMR */
  57         out_be32(&sdram->mode, CONFIG_SYS_SDRAM_MODE);
  58         asm("nop");
  59         out_be32(&sdram->mode, CONFIG_SYS_SDRAM_EMOD);
  60         asm("nop");
  61
  62         out_be32(&sdram->ctrl, CONFIG_SYS_SDRAM_CTRL | 2);
  63         asm("nop");
  64
  65         out_be32(&sdram->ctrl,
  66                 (CONFIG_SYS_SDRAM_CTRL & ~0x80000000) | 0x10000c00);
  67         asm("nop");
  68
  69         udelay(100);
  70
  71         gd->ram_size = dramsize;
  72
  73         return 0;
  74 };
  75
  76 int testdram(void)
  77 {
  78         /* TODO: XXX XXX XXX */
  79         printf("DRAM test not implemented!\n");
  80
  81         return (0);
  82 }