blob: 926a5a7f36bdc9d1d026877b7d11055481da234e [file] [log] [blame]
/*
* This file is part of the coreboot project.
*
* Copyright (C) 2007-2008 coresystems GmbH
* Copyright (C) 2016 Arthur Heymans arthur@aheymans.xyz
*
* 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.
*/
// __PRE_RAM__ means: use "unsigned" for device, not a struct.
#include <stdint.h>
#include <string.h>
#include <arch/io.h>
#include <device/pci_def.h>
#include <device/pnp_def.h>
#include <cpu/x86/lapic.h>
#include <lib.h>
#include <arch/acpi.h>
#include <cbmem.h>
#include <timestamp.h>
#include <superio/ite/it8718f/it8718f.h>
#include <superio/ite/common/ite.h>
#include <pc80/mc146818rtc.h>
#include <console/console.h>
#include <cpu/x86/bist.h>
#include <cpu/intel/romstage.h>
#include <northbridge/intel/i945/i945.h>
#include <northbridge/intel/i945/raminit.h>
#include <southbridge/intel/i82801gx/i82801gx.h>
#define SERIAL_DEV PNP_DEV(0x2e, IT8718F_SP1)
#define GPIO_DEV PNP_DEV(0x2e, IT8718F_GPIO)
#define EC_DEV PNP_DEV(0x2e, IT8718F_EC)
#define SUPERIO_DEV PNP_DEV(0x2e, 0)
static void setup_sio(void)
{
/* Set default GPIOs on superio */
ite_reg_write(GPIO_DEV, 0x25, 0x40);
ite_reg_write(GPIO_DEV, 0x26, 0x3f);
ite_reg_write(GPIO_DEV, 0x28, 0x41);
ite_reg_write(GPIO_DEV, 0x29, 0x88);
ite_reg_write(GPIO_DEV, 0x2c, 0x1c);
ite_reg_write(GPIO_DEV, 0x62, 0x08);
ite_kill_watchdog(GPIO_DEV);
ite_reg_write(GPIO_DEV, 0xb1, 0x01);
ite_reg_write(GPIO_DEV, 0xb8, 0x80);
ite_reg_write(GPIO_DEV, 0xbb, 0x40);
ite_reg_write(GPIO_DEV, 0xc0, 0x00);
ite_reg_write(GPIO_DEV, 0xc3, 0x00);
ite_reg_write(GPIO_DEV, 0xc8, 0x00);
ite_reg_write(GPIO_DEV, 0xcb, 0x00);
ite_reg_write(GPIO_DEV, 0xf6, 0x26);
ite_reg_write(GPIO_DEV, 0xfc, 0x01);
ite_reg_write(EC_DEV, 0x70, 0x00); // Don't use IRQ9
ite_reg_write(EC_DEV, 0x30, 0xff); // Enable
}
static void ich7_enable_lpc(void)
{
// 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, 0x0000);
// Enable COM1
pci_write_config16(PCI_DEV(0, 0x1f, 0), LPC_EN, CNF2_LPC_EN
| CNF1_LPC_EN | KBC_LPC_EN | FDD_LPC_EN | LPT_LPC_EN
| COMA_LPC_EN);
// Enable SuperIO Power Management Events
pci_write_config32(PCI_DEV(0, 0x1f, 0), GEN1_DEC, 0x000c0801);
/* LPC decode range 2: Environment Controller */
pci_write_config32(PCI_DEV(0, 0x1f, 0), GEN2_DEC, 0x00040291);
}
static void rcba_config(void)
{
/* Enable IOAPIC */
RCBA8(OIC) = 0x03;
/* Disable unused devices */
RCBA32(FD) = 0x003c0061;
/* Enable PCIe Root Port Clock Gate */
RCBA32(CG) = 0x00000001;
}
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);
RCBA32(0x0088) = 0x0011d000;
RCBA16(0x01fc) = 0x060f;
RCBA32(0x01f4) = 0x86000040;
RCBA32(0x0214) = 0x10030509;
RCBA32(0x0218) = 0x00020504;
RCBA8(0x0220) = 0xc5;
reg32 = RCBA32(GCS);
reg32 |= (1 << 6);
RCBA32(GCS) = reg32;
reg32 = RCBA32(0x3430);
reg32 &= ~(3 << 0);
reg32 |= (1 << 0);
RCBA32(0x3430) = reg32;
RCBA32(FD) |= (1 << 0);
RCBA16(0x0200) = 0x2008;
RCBA8(0x2027) = 0x0d;
RCBA16(0x3e08) |= (1 << 7);
RCBA16(0x3e48) |= (1 << 7);
RCBA32(0x3e0e) |= (1 << 7);
RCBA32(0x3e4e) |= (1 << 7);
// next step only on ich7m b0 and later:
reg32 = RCBA32(0x2034);
reg32 &= ~(0x0f << 16);
reg32 |= (5 << 16);
RCBA32(0x2034) = reg32;
}
void mainboard_romstage_entry(unsigned long bist)
{
int s3resume = 0, boot_mode = 0;
timestamp_init(get_initial_timestamp());
timestamp_add_now(TS_START_ROMSTAGE);
if (bist == 0)
enable_lapic();
ich7_enable_lpc();
/* Enable SuperIO PM */
setup_sio();
ite_enable_serial(SERIAL_DEV, CONFIG_TTYS0_BASE);
/* Disable SIO reboot */
ite_reg_write(GPIO_DEV, 0xEF, 0x7E);
/* Set up the console */
console_init();
/* Halt if there was a built in self test failure */
report_bist_failure(bist);
if (MCHBAR16(SSKPD) == 0xCAFE) {
printk(BIOS_DEBUG, "soft reset detected.\n");
boot_mode = 1;
}
/* 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_DEFAULT_CONSOLE_LOGLEVEL > 8
dump_spd_registers();
#endif
timestamp_add_now(TS_BEFORE_INITRAM);
sdram_initialize(s3resume ? 2 : boot_mode, NULL);
timestamp_add_now(TS_AFTER_INITRAM);
/* 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);
}