ocrtc.c

omap osk环境下的bootloader,包含完整的uboot源代码

/*
 * (C) Copyright 2001
 * Stefan Roese, esd gmbh germany, [e-mail]
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

#include <common.h>
#include "ocrtc.h"
#include <asm/processor.h>
#include <i2c.h>
#include <command.h>

/* ------------------------------------------------------------------------- */

int board_early_init_f (void)
{
	/*
	 * IRQ 0-15  405GP internally generated; active high; level sensitive
	 * IRQ 16    405GP internally generated; active low; level sensitive
	 * IRQ 17-24 RESERVED
	 * IRQ 25 (EXT IRQ 0) CAN0; active low; level sensitive
	 * IRQ 26 (EXT IRQ 1) CAN1; active low; level sensitive
	 * IRQ 27 (EXT IRQ 2) PCI SLOT 0; active low; level sensitive
	 * IRQ 28 (EXT IRQ 3) PCI SLOT 1; active low; level sensitive
	 * IRQ 29 (EXT IRQ 4) PCI SLOT 2; active low; level sensitive
	 * IRQ 30 (EXT IRQ 5) PCI SLOT 3; active low; level sensitive
	 * IRQ 31 (EXT IRQ 6) COMPACT FLASH; active high; level sensitive
	 */
	mtdcr (uicsr, 0xFFFFFFFF);	/* clear all ints */
	mtdcr (uicer, 0x00000000);	/* disable all ints */
	mtdcr (uiccr, 0x00000000);	/* set all to be non-critical */
	mtdcr (uicpr, 0xFFFFFF81);	/* set int polarities */
	mtdcr (uictr, 0x10000000);	/* set int trigger levels */
	mtdcr (uicvcr, 0x00000001);	/* set vect base=0,INT0 highest priority */
	mtdcr (uicsr, 0xFFFFFFFF);	/* clear all ints */

	/*
	 * EBC Configuration Register: clear EBTC -> high-Z ebc signals between
	 * transfers, set device-paced timeout to 256 cycles
	 */
	mtebc (epcr, 0x20400000);

	return 0;
}


/* ------------------------------------------------------------------------- */

int misc_init_f (void)
{
	return 0;					/* dummy implementation */
}


/*
 * Check Board Identity:
 */

int checkboard (void)
{
	unsigned char str[64];
	int i = getenv_r ("serial#", str, sizeof (str));

	puts ("Board: ");

	if (i == -1) {
#ifdef CONFIG_OCRTC
		puts ("### No HW ID - assuming OCRTC");
#endif
#ifdef CONFIG_ORSG
		puts ("### No HW ID - assuming ORSG");
#endif
	} else {
		puts (str);
	}

	putc ('\n');

	return (0);
}

/* ------------------------------------------------------------------------- */

long int initdram (int board_type)
{
	unsigned long val;

	mtdcr (memcfga, mem_mb0cf);
	val = mfdcr (memcfgd);

#if 0
	printf ("\nmb0cf=%x\n", val);	/* test-only */
	printf ("strap=%x\n", mfdcr (strap));	/* test-only */
#endif

	return (4 * 1024 * 1024 << ((val & 0x000e0000) >> 17));
}

/* ------------------------------------------------------------------------- */

int testdram (void)
{
	/* TODO: XXX XXX XXX */
	printf ("test: 16 MB - ok\n");

	return (0);
}

/* ------------------------------------------------------------------------- */