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/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 FireEngine 5373 EVB\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 = CFG_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, CFG_SYS_SDRAM_BASE | i);
  41         out_be32(&sdram->cfg1, CFG_SYS_SDRAM_CFG1);
  42         out_be32(&sdram->cfg2, CFG_SYS_SDRAM_CFG2);
  43
  44         /* Issue PALL */
  45         out_be32(&sdram->ctrl, CFG_SYS_SDRAM_CTRL | 2);
  46
  47         /* Issue LEMR */
  48         out_be32(&sdram->mode, CFG_SYS_SDRAM_EMOD);
  49         out_be32(&sdram->mode, CFG_SYS_SDRAM_MODE | 0x04000000);
  50
  51         udelay(500);
  52
  53         /* Issue PALL */
  54         out_be32(&sdram->ctrl, CFG_SYS_SDRAM_CTRL | 2);
  55
  56         /* Perform two refresh cycles */
  57         out_be32(&sdram->ctrl, CFG_SYS_SDRAM_CTRL | 4);
  58         out_be32(&sdram->ctrl, CFG_SYS_SDRAM_CTRL | 4);
  59
  60         out_be32(&sdram->mode, CFG_SYS_SDRAM_MODE);
  61
  62         out_be32(&sdram->ctrl,
  63                 (CFG_SYS_SDRAM_CTRL & ~0x80000000) | 0x10000c00);
  64
  65         udelay(100);
  66
  67         gd->ram_size = dramsize;
  68
  69         return 0;
  70 };
  71
  72 int testdram(void)
  73 {
  74         /* TODO: XXX XXX XXX */
  75         printf("DRAM test not implemented!\n");
  76
  77         return (0);
  78 }