canbt.c

嵌入式linux的bsp

/*
 * (C) Copyright 2001
 * Matthias Fuchs, 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 "canbt.h"
#include <asm/processor.h>
#include <405gp_i2c.h>
#include <command.h>
#include <cmd_boot.h>

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

#if 0
#define FPGA_DEBUG
#endif

/* fpga configuration data */
const unsigned char fpgadata[] =
{
#include "fpgadata.c"
};

/*
 * include common fpga code (for esd boards)
 */
#include "../common/fpga.c"


int board_pre_init (void)
{
  unsigned long cntrl0Reg;
  int index, len, i;

  /*
   * Setup GPIO pins
   */
  cntrl0Reg = mfdcr(cntrl0) & 0xf0001fff;
  cntrl0Reg |= 0x0070f000;
  mtdcr(cntrl0, cntrl0Reg);

#ifdef FPGA_DEBUG
  /* set up serial port with default baudrate */
  serial_init(0, CONFIG_BAUDRATE);
  console_init_f();
#endif 

  /*
   * Boot onboard FPGA
   */
  if (fpga_boot_compressed() != 0)
    {
      /* booting FPGA failed */
#ifndef FPGA_DEBUG
      /* set up serial port with default baudrate */
      serial_init(0, CONFIG_BAUDRATE);
      console_init_f();
#endif 
      printf("\nFPGA: Booting failed!\n ");
      /* display infos on fpgaimage */
      index = 15;
      for (i=0; i<4; i++)
	{
	  len = fpgadata[index];
	  printf("FPGA: %s\n", &(fpgadata[index+1]));
	  index += len+3;
	}
      putc ('\n');  
      /* delayed reboot */
      for (i=20; i>0; i--)
	{
	  printf("Rebooting in %2d seconds \r",i);
	  for (index=0;index<1000;index++)
	    udelay(1000);
	}
      putc ('\n');  
      do_reset(NULL, NULL, 0, 0, NULL);
    }

  /*
   * Setup port pins for normal operation
   */
  out32(IBM405GP_GPIO0_ODR, 0x00038000);  /* no open drain pins */
  out32(IBM405GP_GPIO0_TCR, 0x07000100);  /* setup for output */
  out32(IBM405GP_GPIO0_OR, 0x07038100);   /* set output pins to high (default) */

  /*
   * 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;
}


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

/*
 * Check Board Identity:
 */

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

    if (!s || strncmp(s, "CANBT", 5))
      {
	printf ("### No HW ID - assuming CANBT");
      }
    else
      {
        for (e=s; *e; ++e) {
          if (*e == ' ')
	    break;
        }

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

    printf("\nFPGA:  ");

    /* display infos on fpgaimage */
    index = 15;
    for (i=0; i<4; i++)
      {
        len = fpgadata[index];
        printf("%s ", &(fpgadata[index+1]));
        index += len+3;
      }

    putc ('\n');

    return (0);
}

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

long int initdram (int board_type)
{
  return (16 * 1024*1024);
}

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

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

    return (0);
}

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