src/mainboard/rca/rm4100/romstage.c

/*
 * This file is part of the coreboot project.
 *
 * Copyright (C) 2008-2010 Joseph Smith <joe@settoplinux.org>
 *
 * 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.
 */

#include <stdint.h>
#include <stdlib.h>
#include <device/pci_def.h>
#include <arch/io.h>
#include <device/pnp_def.h>
#include "drivers/pc80/udelay_io.c"
#include <console/console.h>
#include <lib.h>
#include <superio/smsc/smscsuperio/smscsuperio.h>
#include <northbridge/intel/i82830/raminit.h>
#include "northbridge/intel/i82830/memory_initialized.c"
#include <southbridge/intel/i82801dx/i82801dx.h>
#include "southbridge/intel/i82801dx/reset.c"
#include <cpu/x86/bist.h>
#include "spd_table.h"
#include "gpio.c"
#include "southbridge/intel/i82801dx/tco_timer.c"

#define SERIAL_DEV PNP_DEV(0x2e, SMSCSUPERIO_SP1)

/**
 * The onboard 64MB PC133 memory does not have a SPD EEPROM so the
 * values have to be set manually, the SO-DIMM socket is located in
 * socket0 (0x50/DIMM0), and the onboard memory is located in socket1
 * (0x51/DIMM1).
 */
static inline int spd_read_byte(unsigned device, unsigned address)
{
	int i;

	if (device == DIMM0) {
		return smbus_read_byte(device, address);
	} else if (device == DIMM1) {
		for (i = 0; i < ARRAY_SIZE(spd_table); i++) {
			if (spd_table[i].address == address)
				return spd_table[i].data;
		}
		return 0xFF; /* Return 0xFF when address is not found. */
	} else {
		return 0xFF; /* Return 0xFF on any failures. */
	}
}

#include "northbridge/intel/i82830/raminit.c"

/**
 * Setup mainboard specific registers pre raminit.
 */
static void mb_early_setup(void)
{
	/* - Hub Interface to PCI Bridge Registers - */
	/* 12-Clock Retry Enable */
	pci_write_config16(PCI_DEV(0, 0x1e, 0), 0x50, 0x1402);
	/* Master Latency Timer Count */
	pci_write_config8(PCI_DEV(0, 0x1e, 0), 0x1b, 0x20);
	/* I/O Address Base */
	pci_write_config8(PCI_DEV(0, 0x1e, 0), 0x1c, 0xf0);

	/* - LPC Interface Bridge Registers - */
	/* Delayed Transaction Enable */
	pci_write_config32(PCI_DEV(0, 0x1f, 0), 0xd0, 0x00000002);
	/* Disable the TCO Timer system reboot feature */
	pci_write_config8(PCI_DEV(0, 0x1f, 0), 0xd4, 0x02);
	/* CPU Frequency Strap */
	pci_write_config8(PCI_DEV(0, 0x1f, 0), 0xd5, 0x02);
	/* ACPI base address and enable Resource Indicator */
	pci_write_config32(PCI_DEV(0, 0x1f, 0), PMBASE, (PMBASE_ADDR | 1));
	/* Enable the SMBUS */
	enable_smbus();
	/* ACPI base address and disable Resource Indicator */
	pci_write_config32(PCI_DEV(0, 0x1f, 0), PMBASE, (PMBASE_ADDR));
	/*  ACPI Enable */
	pci_write_config8(PCI_DEV(0, 0x1f, 0), ACPI_CNTL, 0x10);
}

#include <cpu/intel/romstage.h>
void main(unsigned long bist)
{
	if (bist == 0) {
		if (memory_initialized())
			hard_reset();
	}

	/* Set southbridge and superio gpios */
	mb_gpio_init();

	smscsuperio_enable_serial(SERIAL_DEV, CONFIG_TTYS0_BASE);
	console_init();

	/* Halt if there was a built in self test failure. */
	report_bist_failure(bist);

	/* disable TCO timers */
	i82801dx_halt_tco_timer();

	/* Setup mainboard specific registers */
	mb_early_setup();

	/* Initialize memory */
	sdram_initialize();
}