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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2007-2010 coresystems GmbH
*
* 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; version 2 of the License.
*
* 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 <cf9_reset.h>
#include <console/console.h>
#include <arch/romstage.h>
#include <cpu/x86/lapic.h>
#include <device/pci_def.h>
#include <device/pci_ops.h>
#include <device/pnp_ops.h>
#include <device/pnp_def.h>
#include <pc80/mc146818rtc.h>
#include <northbridge/intel/i945/i945.h>
#include <northbridge/intel/i945/raminit.h>
#include <southbridge/intel/i82801gx/i82801gx.h>
#include <southbridge/intel/common/pmclib.h>
#include <superio/winbond/common/winbond.h>
#include <superio/winbond/w83627thg/w83627thg.h>
#include "option_table.h"
#define SERIAL_DEV PNP_DEV(0x2e, W83627THG_SP1)
static void ich7_enable_lpc(void)
{
int lpt_en = 0;
if (read_option(lpt, 0) != 0)
lpt_en = LPT_LPC_EN; /* enable LPT */
/* Enable Serial IRQ */
pci_write_config8(PCI_DEV(0, 0x1f, 0), SERIRQ_CNTL, 0xd0);
/* Set COM1/COM2 decode range */
pci_write_config16(PCI_DEV(0, 0x1f, 0), LPC_IO_DEC, 0x0010);
/* Enable COM1/COM2/KBD/SuperIO1+2 */
pci_write_config16(PCI_DEV(0, 0x1f, 0), LPC_EN, CNF2_LPC_EN
| CNF1_LPC_EN | KBC_LPC_EN | FDD_LPC_EN | COMA_LPC_EN
| COMB_LPC_EN | lpt_en);
/* Enable HWM at 0xa00 */
pci_write_config32(PCI_DEV(0, 0x1f, 0), GEN1_DEC, 0x00fc0a01);
/* COM3 decode */
pci_write_config32(PCI_DEV(0, 0x1f, 0), GEN2_DEC, 0x000403e9);
/* COM4 decode */
pci_write_config32(PCI_DEV(0, 0x1f, 0), GEN3_DEC, 0x000402e9);
/* io 0x300 decode */
pci_write_config32(PCI_DEV(0, 0x1f, 0), GEN4_DEC, 0x00000301);
}
/* This box has two superios, so enabling serial becomes slightly excessive.
* We disable a lot of stuff to make sure that there are no conflicts between
* the two. Also set up the GPIOs from the beginning. This is the "no schematic
* but safe anyways" method.
*/
static void early_superio_config_w83627thg(void)
{
pnp_devfn_t dev;
dev = PNP_DEV(0x2e, W83627THG_SP1);
pnp_enter_conf_state(dev);
pnp_write_config(dev, 0x24, 0xc6); /* PNPCSV */
pnp_write_config(dev, 0x29, 0x43); /* GPIO settings */
pnp_write_config(dev, 0x2a, 0x40); /* GPIO settings */
dev = PNP_DEV(0x2e, W83627THG_SP1);
pnp_set_logical_device(dev);
pnp_set_enable(dev, 0);
pnp_set_iobase(dev, PNP_IDX_IO0, 0x3f8);
pnp_set_irq(dev, PNP_IDX_IRQ0, 4);
pnp_set_enable(dev, 1);
dev = PNP_DEV(0x2e, W83627THG_SP2);
pnp_set_logical_device(dev);
pnp_set_enable(dev, 0);
pnp_set_iobase(dev, PNP_IDX_IO0, 0x2f8);
pnp_set_irq(dev, PNP_IDX_IRQ0, 3);
pnp_set_enable(dev, 1);
dev = PNP_DEV(0x2e, W83627THG_KBC);
pnp_set_logical_device(dev);
pnp_set_enable(dev, 0);
pnp_set_iobase(dev, PNP_IDX_IO0, 0x60);
pnp_set_iobase(dev, PNP_IDX_IO1, 0x64);
pnp_set_enable(dev, 1);
dev = PNP_DEV(0x2e, W83627THG_GAME_MIDI_GPIO1);
pnp_set_logical_device(dev);
pnp_set_enable(dev, 0);
pnp_write_config(dev, 0xf5, 0xff); /* invert all GPIOs */
pnp_set_enable(dev, 1);
dev = PNP_DEV(0x2e, W83627THG_GPIO2);
pnp_set_logical_device(dev);
pnp_set_enable(dev, 1); /* Just enable it */
dev = PNP_DEV(0x2e, W83627THG_GPIO3);
pnp_set_logical_device(dev);
pnp_set_enable(dev, 0);
pnp_write_config(dev, 0xf0, 0xfb); /* GPIO bit 2 is output */
pnp_write_config(dev, 0xf1, 0x00); /* GPIO bit 2 is 0 */
pnp_write_config(dev, 0x30, 0x03); /* Enable GPIO3+4. pnp_set_enable is not sufficient */
dev = PNP_DEV(0x2e, W83627THG_FDC);
pnp_set_logical_device(dev);
pnp_set_enable(dev, 0);
dev = PNP_DEV(0x2e, W83627THG_PP);
pnp_set_logical_device(dev);
pnp_set_enable(dev, 0);
/* Enable HWM */
dev = PNP_DEV(0x2e, W83627THG_HWM);
pnp_set_logical_device(dev);
pnp_set_enable(dev, 0);
pnp_set_iobase(dev, PNP_IDX_IO0, 0xa00);
pnp_set_enable(dev, 1);
pnp_exit_conf_state(dev);
dev = PNP_DEV(0x4e, W83627THG_SP1);
pnp_enter_conf_state(dev);
pnp_set_logical_device(dev); /* Set COM3 to sane non-conflicting values */
pnp_set_enable(dev, 0);
pnp_set_iobase(dev, PNP_IDX_IO0, 0x3e8);
pnp_set_irq(dev, PNP_IDX_IRQ0, 11);
pnp_set_enable(dev, 1);
dev = PNP_DEV(0x4e, W83627THG_SP2);
pnp_set_logical_device(dev); /* Set COM4 to sane non-conflicting values */
pnp_set_enable(dev, 0);
pnp_set_iobase(dev, PNP_IDX_IO0, 0x2e8);
pnp_set_irq(dev, PNP_IDX_IRQ0, 10);
pnp_set_enable(dev, 1);
dev = PNP_DEV(0x4e, W83627THG_FDC);
pnp_set_logical_device(dev);
pnp_set_enable(dev, 0);
dev = PNP_DEV(0x4e, W83627THG_PP);
pnp_set_logical_device(dev);
pnp_set_enable(dev, 0);
dev = PNP_DEV(0x4e, W83627THG_KBC);
pnp_set_logical_device(dev);
pnp_set_enable(dev, 0);
pnp_set_iobase(dev, PNP_IDX_IO0, 0x00);
pnp_set_iobase(dev, PNP_IDX_IO1, 0x00);
pnp_exit_conf_state(dev);
}
static void rcba_config(void)
{
/* Set up virtual channel 0 */
/* Device 1f interrupt pin register */
RCBA32(D31IP) = 0x00042210;
/* Device 1d interrupt pin register */
RCBA32(D28IP) = 0x00214321;
/* dev irq route register */
RCBA16(D31IR) = 0x0132;
RCBA16(D30IR) = 0x3241;
RCBA16(D29IR) = 0x0237;
RCBA16(D28IR) = 0x3210;
RCBA16(D27IR) = 0x3210;
/* Enable IOAPIC */
RCBA8(OIC) = 0x03;
/* Enable PCIe Root Port Clock Gate */
}
static void early_ich7_init(void)
{
uint8_t reg8;
uint32_t reg32;
/* program secondary mlt XXX byte? */
pci_write_config8(PCI_DEV(0, 0x1e, 0), 0x1b, 0x20);
/* reset rtc power status */
reg8 = pci_read_config8(PCI_DEV(0, 0x1f, 0), 0xa4);
reg8 &= ~(1 << 2);
pci_write_config8(PCI_DEV(0, 0x1f, 0), 0xa4, reg8);
/* usb transient disconnect */
reg8 = pci_read_config8(PCI_DEV(0, 0x1f, 0), 0xad);
reg8 |= (3 << 0);
pci_write_config8(PCI_DEV(0, 0x1f, 0), 0xad, reg8);
reg32 = pci_read_config32(PCI_DEV(0, 0x1d, 7), 0xfc);
reg32 |= (1 << 29) | (1 << 17);
pci_write_config32(PCI_DEV(0, 0x1d, 7), 0xfc, reg32);
reg32 = pci_read_config32(PCI_DEV(0, 0x1d, 7), 0xdc);
reg32 |= (1 << 31) | (1 << 27);
pci_write_config32(PCI_DEV(0, 0x1d, 7), 0xdc, reg32);
ich7_setup_cir();
}
void mainboard_romstage_entry(void)
{
int s3resume = 0;
enable_lapic();
ich7_enable_lpc();
early_superio_config_w83627thg();
/* Set up the console */
console_init();
if (MCHBAR16(SSKPD) == 0xCAFE) {
printk(BIOS_DEBUG, "soft reset detected, rebooting properly\n");
system_reset();
}
/* Perform some early chipset initialization required
* before RAM initialization can work
*/
i945_early_initialization();
s3resume = southbridge_detect_s3_resume();
/* Enable SPD ROMs and DDR-II DRAM */
enable_smbus();
if (CONFIG(DEBUG_RAM_SETUP))
dump_spd_registers();
sdram_initialize(s3resume ? 2 : 0, NULL);
/* Perform some initialization that must run before stage2 */
early_ich7_init();
/* This should probably go away. Until now it is required
* and mainboard specific
*/
rcba_config();
/* Chipset Errata! */
fixup_i945_errata();
/* Initialize the internal PCIe links before we go into stage2 */
i945_late_initialization(s3resume);
}
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