LXR uboot/arch/arm/cpu/arm926ejs/mx28/spl

   1/*
   2 * Freescale i.MX28 Boot setup
   3 *
   4 * Copyright (C) 2011 Marek Vasut <marek.vasut@gmail.com>
   5 * on behalf of DENX Software Engineering GmbH
   6 *
   7 * See file CREDITS for list of people who contributed to this
   8 * project.
   9 *
  10 * This program is free software; you can redistribute it and/or
  11 * modify it under the terms of the GNU General Public License as
  12 * published by the Free Software Foundation; either version 2 of
  13 * the License, or (at your option) any later version.
  14 *
  15 * This program is distributed in the hope that it will be useful,
  16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 * GNU General Public License for more details.
  19 *
  20 * You should have received a copy of the GNU General Public License
  21 * along with this program; if not, write to the Free Software
  22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  23 * MA 02111-1307 USA
  24 */
  25
  26#include <common.h>
  27#include <config.h>
  28#include <asm/io.h>
  29#include <asm/arch/iomux-mx28.h>
  30#include <asm/arch/imx-regs.h>
  31
  32#include "mx28_init.h"
  33
  34/*
  35 * This delay function is intended to be used only in early stage of boot, where
  36 * clock are not set up yet. The timer used here is reset on every boot and
  37 * takes a few seconds to roll. The boot doesn't take that long, so to keep the
  38 * code simple, it doesn't take rolling into consideration.
  39 */
  40#define HW_DIGCTRL_MICROSECONDS 0x8001c0c0
  41void early_delay(int delay)
  42{
  43        uint32_t st = readl(HW_DIGCTRL_MICROSECONDS);
  44        st += delay;
  45        while (st > readl(HW_DIGCTRL_MICROSECONDS))
  46                ;
  47}
  48
  49void mx28_common_spl_init(const iomux_cfg_t *iomux_setup,
  50                        const unsigned int iomux_size)
  51{
  52        mxs_iomux_setup_multiple_pads(iomux_setup, iomux_size);
  53        mx28_power_init();
  54        mx28_mem_init();
  55        mx28_power_wait_pswitch();
  56}
  57
  58/* Support aparatus */
  59inline void board_init_f(unsigned long bootflag)
  60{
  61        for (;;)
  62                ;
  63}
  64
  65inline void board_init_r(gd_t *id, ulong dest_addr)
  66{
  67        for (;;)
  68                ;
  69}
  70
  71void serial_putc(const char c) {}
  72void serial_puts(const char *s) {}
  73void hang(void) __attribute__ ((noreturn));
  74void hang(void)
  75{
  76        for (;;)
  77                ;
  78}
  79