/*
 * (C) Copyright 2000
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * 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 "walnut405.h"
#include <asm/processor.h>
#include <405_dimm.h>


int board_pre_init (void)
{
   /*-------------------------------------------------------------------------+
   | Interrupt controller setup for the Walnut board.
   | Note: 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) FPGA; active high; level sensitive
   |       IRQ 26 (EXT IRQ 1) SMI; active high; level sensitive
   |       IRQ 27 (EXT IRQ 2) Not Used
   |       IRQ 28 (EXT IRQ 3) PCI SLOT 3; active low; level sensitive
   |       IRQ 29 (EXT IRQ 4) PCI SLOT 2; active low; level sensitive
   |       IRQ 30 (EXT IRQ 5) PCI SLOT 1; active low; level sensitive
   |       IRQ 31 (EXT IRQ 6) PCI SLOT 0; active low; level sensitive
   | Note for Walnut board:
   |       An interrupt taken for the FPGA (IRQ 25) indicates that either
   |       the Mouse, Keyboard, IRDA, or External Expansion caused the
   |       interrupt. The FPGA must be read to determine which device
   |       caused the interrupt. The default setting of the FPGA clears
   |
   +-------------------------------------------------------------------------*/

	mtdcr(uicsr, 0xFFFFFFFF);  /* clear all ints */
	mtdcr(uicer, 0x00000000);  /* disable all ints */
	mtdcr(uiccr, 0x00000020);  /* set all but FPGA SMI to be non-critical*/
	mtdcr(uicpr, 0xFFFFFFE0);  /* 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 */

#define mtebc(reg, data)  mtdcr(ebccfga,reg);mtdcr(ebccfgd,data)
	/* BAS=0xF00,BS=0x0(1MB),BU=0x3(R/W),BW=0x0( 8 bits) */
	mtebc(pb1ap,0x02815480);
	mtebc(pb1cr,0xF0018000);

	// BAS=0xF01,BS=0x0(1MB),BU=0x3(R/W),BW=0x0(8 bits)
	mtebc(pb2ap,0x04815A80);
	mtebc(pb2cr,0xF0118000);

	// BAS=0xF02,BS=0x0(1MB),BU=0x3(R/W),BW=0x0( 8 bits)
	mtebc(pb3ap,0x01815280);
	mtebc(pb3cr,0xF0218000);
	
	// BAS=0xF03,BS=0x0(1MB),BU=0x3(R/W),BW=0x0(8 bits)
	mtebc(pb7ap,0x01815280);
	mtebc(pb7cr,0xF0318000);

	//set UART1 control to select CTS/RTS
#define FPGA_BRDC       0xF0300004
	*(volatile char *)(FPGA_BRDC) |= 0x1;

	return 0;
}


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

/*
 * Check Board Identity:
 */

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

    if (!s || strncmp(s, "WALNUT405", 9))
      {
	printf ("### No HW ID - assuming WALNUT405");
      }
    else
      {
        for (e=s; *e; ++e) {
          if (*e == ' ')
	    break;
        }

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


    putc ('\n');

    return (0);
}


/* ------------------------------------------------------------------------- 
  initdram(int board_type) reads EEPROM via I2c. EEPROM contains all of
  the necessary info for SDRAM controller configuration
   ------------------------------------------------------------------------- */
long int initdram (int board_type)
{
  return walnut_dimm();
}

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

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

    return (0);
}

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

