LXR uboot/nand_spl/board/freescale/mpc8572ds/nand

   1/*
   2 * Copyright 2009-2010 Freescale Semiconductor, Inc.
   3 *
   4 * This program is free software; you can redistribute it and/or
   5 * modify it under the terms of the GNU General Public License as
   6 * published by the Free Software Foundation; either version 2 of
   7 * the License, or (at your option) any later version.
   8 *
   9 * This program is distributed in the hope that it will be useful,
  10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  12 *
  13 * GNU General Public License for more details.
  14 *
  15 * You should have received a copy of the GNU General Public License
  16 * along with this program; if not, write to the Free Software
  17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  18 * MA 02111-1307 USA
  19 *
  20 */
  21
  22#include <common.h>
  23#include <ns16550.h>
  24#include <asm/io.h>
  25#include <nand.h>
  26
  27u32 sysclk_tbl[] = {
  28        33333000, 39999600, 49999500, 66666000,
  29        83332500, 99999000, 133332000, 166665000
  30};
  31
  32void board_init_f(ulong bootflag)
  33{
  34        int px_spd;
  35        u32 plat_ratio, bus_clk, sys_clk;
  36        ccsr_gur_t *gur = (void *)CONFIG_SYS_MPC85xx_GUTS_ADDR;
  37
  38#if defined(CONFIG_SYS_BR3_PRELIM) && defined(CONFIG_SYS_OR3_PRELIM)
  39        /* for FPGA */
  40        set_lbc_br(3, CONFIG_SYS_BR3_PRELIM);
  41        set_lbc_or(3, CONFIG_SYS_OR3_PRELIM);
  42#else
  43#error CONFIG_SYS_BR3_PRELIM, CONFIG_SYS_OR3_PRELIM must be defined
  44#endif
  45
  46        /* initialize selected port with appropriate baud rate */
  47        px_spd = in_8((unsigned char *)(PIXIS_BASE + PIXIS_SPD));
  48        sys_clk = sysclk_tbl[px_spd & PIXIS_SPD_SYSCLK_MASK];
  49        plat_ratio = in_be32(&gur->porpllsr) & MPC85xx_PORPLLSR_PLAT_RATIO;
  50        bus_clk = sys_clk * plat_ratio / 2;
  51
  52        NS16550_init((NS16550_t)CONFIG_SYS_NS16550_COM1,
  53                        bus_clk / 16 / CONFIG_BAUDRATE);
  54
  55        puts("\nNAND boot... ");
  56
  57        /* copy code to RAM and jump to it - this should not return */
  58        /* NOTE - code has to be copied out of NAND buffer before
  59         * other blocks can be read.
  60         */
  61        relocate_code(CONFIG_SYS_NAND_U_BOOT_RELOC_SP, 0,
  62                        CONFIG_SYS_NAND_U_BOOT_RELOC);
  63}
  64
  65void board_init_r(gd_t *gd, ulong dest_addr)
  66{
  67        nand_boot();
  68}
  69
  70void putc(char c)
  71{
  72        if (c == '\n')
  73                NS16550_putc((NS16550_t)CONFIG_SYS_NS16550_COM1, '\r');
  74
  75        NS16550_putc((NS16550_t)CONFIG_SYS_NS16550_COM1, c);
  76}
  77
  78void puts(const char *str)
  79{
  80        while (*str)
  81                putc(*str++);
  82}
  83