/*
 * This file is part of the coreboot project.
 *
 * Copyright (C) 2007-2009 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.
 *
 * 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., 51 Franklin St, Fifth Floor, Boston,
 * MA 02110-1301 USA
 */

// __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 <pc80/mc146818rtc.h>
#include <console/console.h>
#include <cpu/x86/bist.h>
#include "northbridge/intel/i945/i945.h"
#include "northbridge/intel/i945/raminit.h"
#include "southbridge/intel/i82801gx/i82801gx.h"
#include "option_table.h"

void setup_ich7_gpios(void)
{
	printk(BIOS_DEBUG, " GPIOS...");
	/* General Registers */
	outl(0xbfc0f7c0, DEFAULT_GPIOBASE + 0x00);	/* GPIO_USE_SEL */
	outl(0x70a87d83, DEFAULT_GPIOBASE + 0x04);	/* GP_IO_SEL */
	// ------------------------------------------------------------
	// 0 - GPO6  - Enable power of SATA channel 0
	// 0 - GPO9  - Wireless LAN power on
	// 0 - GPO15 - FAN on
	// 1 - GPO22 - FWH WP
	// 1 - GPO24 - GPS on
	// 0 - GPO25 - External Antenna Mux on
	// 0 - GPO26 - BT on
	// 0 - GPO27 - GSM on
	outl(0x01400000, DEFAULT_GPIOBASE + 0x0c);	/* GP_LVL */
	// ------------------------------------------------------------
	/* Output Control Registers */
	outl(0x00000000, DEFAULT_GPIOBASE + 0x18);	/* GPO_BLINK */
	/* Input Control Registers */
	outl(0x00002180, DEFAULT_GPIOBASE + 0x2c);	/* GPI_INV */
	outl(0x000100e8, DEFAULT_GPIOBASE + 0x30);	/* GPIO_USE_SEL2 */
	outl(0x00000030, DEFAULT_GPIOBASE + 0x34);	/* GP_IO_SEL2 */
	// ------------------------------------------------------------
	// 1 - GPO48 - FWH TBL#
	outl(0x00010000, DEFAULT_GPIOBASE + 0x38);	/* GP_LVL */
	// ------------------------------------------------------------
}

static void ich7_enable_lpc(void)
{
	int lpt_en = 0;
	if (read_option(lpt, 0) != 0) {
	       lpt_en = 1<<2; // enable LPT
	}
	// Enable Serial IRQ
	pci_write_config8(PCI_DEV(0, 0x1f, 0), 0x64, 0xd0);
	// decode range
	pci_write_config16(PCI_DEV(0, 0x1f, 0), 0x80, 0x0007);
	// decode range
	pci_write_config16(PCI_DEV(0, 0x1f, 0), 0x82, 0x3f0b | lpt_en);
	// Enable 0x02e0
	pci_write_config16(PCI_DEV(0, 0x1f, 0), 0x84, 0x02e1);
	pci_write_config16(PCI_DEV(0, 0x1f, 0), 0x86, 0x001c);
	// COM3 decode
	pci_write_config32(PCI_DEV(0, 0x1f, 0), 0x88, 0x00fc0601);
	// COM4 decode
	pci_write_config32(PCI_DEV(0, 0x1f, 0), 0x8c, 0x00040069);
}

/* 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 inline void pnp_enter_ext_func_mode(device_t dev)
{
	unsigned int port = dev >> 8;
	outb(0x55, port);
}

static void pnp_exit_ext_func_mode(device_t dev)
{
	unsigned int port = dev >> 8;
	outb(0xaa, port);
}

static void pnp_write_register(device_t dev, int reg, int val)
{
	unsigned int port = dev >> 8;
	outb(reg, port);
	outb(val, port+1);
}

static void early_superio_config(void)
{
	device_t dev;

	dev=PNP_DEV(0x2e, 0x00);

	pnp_enter_ext_func_mode(dev);
	pnp_write_register(dev, 0x01, 0x94); // Extended Parport modes
	pnp_write_register(dev, 0x02, 0x88); // UART power on
	pnp_write_register(dev, 0x03, 0x72); // Floppy
	pnp_write_register(dev, 0x04, 0x01); // EPP + SPP
	pnp_write_register(dev, 0x14, 0x03); // Floppy
	pnp_write_register(dev, 0x20, (0x3f0 >> 2)); // Floppy
	pnp_write_register(dev, 0x23, (0x378 >> 2)); // PP base
	pnp_write_register(dev, 0x24, (0x3f8 >> 2)); // UART1 base
	pnp_write_register(dev, 0x25, (0x2f8 >> 2)); // UART2 base
	pnp_write_register(dev, 0x26, (2 << 4) | 0); // FDC + PP DMA
	pnp_write_register(dev, 0x27, (6 << 4) | 7); // FDC + PP DMA
	pnp_write_register(dev, 0x28, (4 << 4) | 3); // UART1,2 IRQ
	/* These are the SMI status registers in the SIO: */
	pnp_write_register(dev, 0x30, (0x600 >> 4)); // Runtime Register Block Base

	pnp_write_register(dev, 0x31, 0x00); // GPIO1 DIR
	pnp_write_register(dev, 0x32, 0x00); // GPIO1 POL
	pnp_write_register(dev, 0x33, 0x40); // GPIO2 DIR
	pnp_write_register(dev, 0x34, 0x00); // GPIO2 POL
	pnp_write_register(dev, 0x35, 0xff); // GPIO3 DIR
	pnp_write_register(dev, 0x36, 0x00); // GPIO3 POL
	pnp_write_register(dev, 0x37, 0xe0); // GPIO4 DIR
	pnp_write_register(dev, 0x38, 0x00); // GPIO4 POL
	pnp_write_register(dev, 0x39, 0x80); // GPIO4 POL

	pnp_exit_ext_func_mode(dev);
}

static void rcba_config(void)
{
	/* Set up virtual channel 0 */
	//RCBA32(0x0014) = 0x80000001;
	//RCBA32(0x001c) = 0x03128010;

	/* Device 1f interrupt pin register */
	RCBA32(0x3100) = 0x00042220;
	/* Device 1d interrupt pin register */
	RCBA32(0x310c) = 0x00214321;

	/* dev irq route register */
	RCBA16(0x3140) = 0x0232;
	RCBA16(0x3142) = 0x3246;
	RCBA16(0x3144) = 0x0237;
	RCBA16(0x3146) = 0x3201;
	RCBA16(0x3148) = 0x3216;

	/* Enable IOAPIC */
	RCBA8(0x31ff) = 0x03;

	/* Enable upper 128bytes of CMOS */
	RCBA32(0x3400) = (1 << 2);

	/* Disable unused devices */
	RCBA32(0x3418) = FD_PCIE6 | FD_PCIE5 | FD_PCIE3 | FD_PCIE2 |
			 FD_INTLAN | FD_ACMOD | FD_HDAUD | FD_PATA;
	RCBA32(0x3418) |= (1 << 0); // Required.

	/* Enable PCIe Root Port Clock Gate */
	// RCBA32(0x341c) = 0x00000001;

	/* This should probably go into the ACPI OS Init trap */

	/* Set up I/O Trap #0 for 0xfe00 (SMIC) */
	RCBA32(0x1e84) = 0x00020001;
	RCBA32(0x1e80) = 0x0000fe01;

	/* Set up I/O Trap #3 for 0x800-0x80c (Trap) */
	RCBA32(0x1e9c) = 0x000200f0;
	RCBA32(0x1e98) = 0x000c0801;
}

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) = 0x10030549;
	RCBA32(0x0218) = 0x00020504;
	RCBA8(0x0220) = 0xc5;
	reg32 = RCBA32(0x3410);
	reg32 |= (1 << 6);
	RCBA32(0x3410) = reg32;
	reg32 = RCBA32(0x3430);
	reg32 &= ~(3 << 0);
	reg32 |= (1 << 0);
	RCBA32(0x3430) = reg32;
	RCBA32(0x3418) |= (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;
}

static void init_artec_dongle(void)
{
	// Enable 4MB decoding
	outb(0xf1, 0x88);
	outb(0xf4, 0x88);
}

#include <cbmem.h>

void main(unsigned long bist)
{
	u32 reg32;
	int boot_mode = 0;

	if (bist == 0)
		enable_lapic();

	/* Force PCIRST# */
	pci_write_config16(PCI_DEV(0, 0x1e, 0), BCTRL, SBR);
	udelay(200 * 1000);
	pci_write_config16(PCI_DEV(0, 0x1e, 0), BCTRL, 0);

	ich7_enable_lpc();
	early_superio_config();

	/* 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, rebooting properly\n");
		outb(0x6, 0xcf9);
		while (1) asm("hlt");
	}

	/* Perform some early chipset initialization required
	 * before RAM initialization can work
	 */
	i945_early_initialization();

	/* This has to happen after i945_early_initialization() */
	init_artec_dongle();

	/* Read PM1_CNT */
	reg32 = inl(DEFAULT_PMBASE + 0x04);
	printk(BIOS_DEBUG, "PM1_CNT: %08x\n", reg32);
	if (((reg32 >> 10) & 7) == 5) {
#if CONFIG_HAVE_ACPI_RESUME
		printk(BIOS_DEBUG, "Resume from S3 detected.\n");
		boot_mode = 2;
		/* Clear SLP_TYPE. This will break stage2 but
		 * we care for that when we get there.
		 */
		outl(reg32 & ~(7 << 10), DEFAULT_PMBASE + 0x04);

#else
		printk(BIOS_DEBUG, "Resume from S3 detected, but disabled.\n");
#endif
	}

	/* Enable SPD ROMs and DDR-II DRAM */
	enable_smbus();

#if CONFIG_DEFAULT_CONSOLE_LOGLEVEL > 8
	dump_spd_registers();
#endif

	sdram_initialize(boot_mode, 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();

#if !CONFIG_HAVE_ACPI_RESUME
#if CONFIG_DEFAULT_CONSOLE_LOGLEVEL > 8
#if CONFIG_DEBUG_RAM_SETUP
	sdram_dump_mchbar_registers();

	{
		/* This will not work if TSEG is in place! */
		u32 tom = pci_read_config32(PCI_DEV(0,2,0), 0x5c);

		printk(BIOS_DEBUG, "TOM: 0x%08x\n", tom);
		ram_check(0x00000000, 0x000a0000);
		ram_check(0x00100000, tom);
	}
#endif
#endif
#endif

	MCHBAR16(SSKPD) = 0xCAFE;

#if CONFIG_HAVE_ACPI_RESUME
	/* Start address of high memory tables */
	unsigned long high_ram_base = get_top_of_ram() - HIGH_MEMORY_SIZE;

	/* If there is no high memory area, we didn't boot before, so
	 * this is not a resume. In that case we just create the cbmem toc.
	 */
	if ((boot_mode == 2) && cbmem_reinit((u64)high_ram_base)) {
		void *resume_backup_memory = cbmem_find(CBMEM_ID_RESUME);

		/* copy 1MB - 64K to high tables ram_base to prevent memory corruption
		 * through stage 2. We could keep stuff like stack and heap in high tables
		 * memory completely, but that's a wonderful clean up task for another
		 * day.
		 */
		if (resume_backup_memory)
			memcpy(resume_backup_memory, (void *)CONFIG_RAMBASE, HIGH_MEMORY_SAVE);

		/* Magic for S3 resume */
		pci_write_config32(PCI_DEV(0, 0x00, 0), SKPAD, SKPAD_ACPI_S3_MAGIC);
	}
#endif
}