134 lines
4.2 KiB
C
134 lines
4.2 KiB
C
/*
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* (C) Copyright 2000
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include "walnut405.h"
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#include <asm/processor.h>
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#include <spd_sdram.h>
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int board_early_init_f (void)
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{
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/*-------------------------------------------------------------------------+
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| Interrupt controller setup for the Walnut board.
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| Note: IRQ 0-15 405GP internally generated; active high; level sensitive
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| IRQ 16 405GP internally generated; active low; level sensitive
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| IRQ 17-24 RESERVED
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| IRQ 25 (EXT IRQ 0) FPGA; active high; level sensitive
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| IRQ 26 (EXT IRQ 1) SMI; active high; level sensitive
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| IRQ 27 (EXT IRQ 2) Not Used
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| IRQ 28 (EXT IRQ 3) PCI SLOT 3; active low; level sensitive
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| IRQ 29 (EXT IRQ 4) PCI SLOT 2; active low; level sensitive
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| IRQ 30 (EXT IRQ 5) PCI SLOT 1; active low; level sensitive
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| IRQ 31 (EXT IRQ 6) PCI SLOT 0; active low; level sensitive
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| Note for Walnut board:
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| An interrupt taken for the FPGA (IRQ 25) indicates that either
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| the Mouse, Keyboard, IRDA, or External Expansion caused the
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| interrupt. The FPGA must be read to determine which device
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| caused the interrupt. The default setting of the FPGA clears
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+-------------------------------------------------------------------------*/
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mtdcr (uicsr, 0xFFFFFFFF); /* clear all ints */
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mtdcr (uicer, 0x00000000); /* disable all ints */
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mtdcr (uiccr, 0x00000020); /* set all but FPGA SMI to be non-critical */
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mtdcr (uicpr, 0xFFFFFFE0); /* set int polarities */
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mtdcr (uictr, 0x10000000); /* set int trigger levels */
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mtdcr (uicvcr, 0x00000001); /* set vect base=0,INT0 highest priority */
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mtdcr (uicsr, 0xFFFFFFFF); /* clear all ints */
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#define mtebc(reg, data) mtdcr(ebccfga,reg);mtdcr(ebccfgd,data)
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/* BAS=0xF00,BS=0x0(1MB),BU=0x3(R/W),BW=0x0( 8 bits) */
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mtebc (pb1ap, 0x02815480);
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mtebc (pb1cr, 0xF0018000);
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/* BAS=0xF01,BS=0x0(1MB),BU=0x3(R/W),BW=0x0(8 bits) */
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mtebc (pb2ap, 0x04815A80);
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mtebc (pb2cr, 0xF0118000);
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/* BAS=0xF02,BS=0x0(1MB),BU=0x3(R/W),BW=0x0( 8 bits) */
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mtebc (pb3ap, 0x01815280);
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mtebc (pb3cr, 0xF0218000);
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/* BAS=0xF03,BS=0x0(1MB),BU=0x3(R/W),BW=0x0(8 bits) */
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mtebc (pb7ap, 0x01815280);
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mtebc (pb7cr, 0xF0318000);
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/* set UART1 control to select CTS/RTS */
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#define FPGA_BRDC 0xF0300004
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*(volatile char *) (FPGA_BRDC) |= 0x1;
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return 0;
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}
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/* ------------------------------------------------------------------------- */
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/*
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* Check Board Identity:
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*/
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int checkboard (void)
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{
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unsigned char *s = getenv ("serial#");
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unsigned char *e;
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puts ("Board: ");
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if (!s || strncmp (s, "WALNUT405", 9)) {
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puts ("### No HW ID - assuming WALNUT405");
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} else {
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for (e = s; *e; ++e) {
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if (*e == ' ')
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break;
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}
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for (; s < e; ++s) {
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putc (*s);
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}
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}
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putc ('\n');
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return (0);
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}
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/* -------------------------------------------------------------------------
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initdram(int board_type) reads EEPROM via I2c. EEPROM contains all of
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the necessary info for SDRAM controller configuration
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------------------------------------------------------------------------- */
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long int initdram (int board_type)
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{
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return spd_sdram (0);
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}
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/* ------------------------------------------------------------------------- */
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int testdram (void)
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{
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/* TODO: XXX XXX XXX */
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printf ("test: xxx MB - ok\n");
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return (0);
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}
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/* ------------------------------------------------------------------------- */
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