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 #include <linux/delay.h>
  16
  17 DECLARE_GLOBAL_DATA_PTR;
  18
  19 int checkboard(void)
  20 {
  21         puts("Board: ");
  22         puts("Freescale FireEngine 5373 EVB\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         out_be32(&sdram->cfg1, CONFIG_SYS_SDRAM_CFG1);
  41         out_be32(&sdram->cfg2, CONFIG_SYS_SDRAM_CFG2);
  42
  43         /* Issue PALL */
  44         out_be32(&sdram->ctrl, CONFIG_SYS_SDRAM_CTRL | 2);
  45
  46         /* Issue LEMR */
  47         out_be32(&sdram->mode, CONFIG_SYS_SDRAM_EMOD);
  48         out_be32(&sdram->mode, CONFIG_SYS_SDRAM_MODE | 0x04000000);
  49
  50         udelay(500);
  51
  52         /* Issue PALL */
  53         out_be32(&sdram->ctrl, CONFIG_SYS_SDRAM_CTRL | 2);
  54
  55         /* Perform two refresh cycles */
  56         out_be32(&sdram->ctrl, CONFIG_SYS_SDRAM_CTRL | 4);
  57         out_be32(&sdram->ctrl, CONFIG_SYS_SDRAM_CTRL | 4);
  58
  59         out_be32(&sdram->mode, CONFIG_SYS_SDRAM_MODE);
  60
  61         out_be32(&sdram->ctrl,
  62                 (CONFIG_SYS_SDRAM_CTRL & ~0x80000000) | 0x10000c00);
  63
  64         udelay(100);
  65
  66         gd->ram_size = dramsize;
  67
  68         return 0;
  69 };
  70
  71 int testdram(void)
  72 {
  73         /* TODO: XXX XXX XXX */
  74         printf("DRAM test not implemented!\n");
  75
  76         return (0);
  77 }