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- /*
- * (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 <common.h>
- #include "walnut405.h"
- #include <asm/processor.h>
- #include <spd_sdram.h>
- int board_early_init_f (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;
- puts ("Board: ");
- if (!s || strncmp (s, "WALNUT405", 9)) {
- puts ("### 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 spd_sdram (0);
- }
- /* ------------------------------------------------------------------------- */
- int testdram (void)
- {
- /* TODO: XXX XXX XXX */
- printf ("test: xxx MB - ok\n");
- return (0);
- }
- /* ------------------------------------------------------------------------- */
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