ocrtc.c

嵌入式linux的bsp

/*
 * (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 <ppcboot.h>
#include "ocrtc.h"
#include <asm/processor.h>
#include <405gp_i2c.h>
#include <command.h>
#include <cmd_boot.h>

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

int board_pre_init (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 */

  return 0;
}


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

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


/*
 * Check Board Identity:
 */

int checkboard (void)
{
    unsigned char *s = getenv("serial#");
    unsigned char *e;

    if (!s)
      {
	printf ("### No HW ID - assuming OCRTC");
      }
    else
      {
        for (e=s; *e; ++e) {
          if (*e == ' ')
	    break;
        }

        for ( ; s<e; ++s) {
          putc (*s);
        }
      }

    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);
}

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