xref: /netbsd-src/sys/arch/evbarm/stand/bootimx23/boot_prep.c (revision bf9547b278baefe91669bbdb5a99d63c7986f1f6)

/* $Id: boot_prep.c,v 1.3 2013/02/23 16:22:39 jkunz Exp $ */

/*
 * Copyright (c) 2012 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Petri Laakso.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <sys/param.h>
#include <sys/cdefs.h>

#include <arm/imx/imx23_digctlreg.h>

#include <lib/libsa/stand.h>

#include "common.h"

/*
 * Initialize i.MX23 power, clocks and DRAM.
 */
int
_start(void)
{

	/* Make sure timer is running. */
	REG_WR(HW_DIGCTL_BASE + HW_DIGCTL_CTRL_CLR,
	    HW_DIGCTL_CTRL_XTAL24M_GATE);

	printf("\n\rBooting");

	power_prep();
	putchar('.');

	clock_prep();
	putchar('.');

	pinctrl_prep();
	putchar('.');

	emi_prep();
	printf("done.\n\r");

	args_prep();

	return 0;
}