/*
 * This file is part of the coreboot project.
 *
 * Copyright (C) 2007-2010 coresystems GmbH
 * Copyright (C) 2011 The ChromiumOS Authors.  All rights reserved.
 *
 * 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.
 */

#include <stdint.h>
#include <string.h>
#include <lib.h>
#include <timestamp.h>
#include <arch/io.h>
#include <device/pci_def.h>
#include <device/pnp_def.h>
#include <cpu/x86/lapic.h>
#include <pc80/mc146818rtc.h>
#include <cbfs.h>
#include <arch/acpi.h>
#include <cbmem.h>
#include <console/console.h>
#include <bootmode.h>
#include <tpm.h>
#include <northbridge/intel/sandybridge/sandybridge.h>
#include <northbridge/intel/sandybridge/raminit.h>
#include <southbridge/intel/bd82x6x/pch.h>
#include <southbridge/intel/bd82x6x/gpio.h>
#include <arch/cpu.h>
#include <cpu/x86/bist.h>
#include <cpu/x86/msr.h>
#include <halt.h>
#include "option_table.h"
#include "gpio.h"
#if CONFIG_DRIVERS_UART_8250IO
#include <superio/smsc/lpc47n207/lpc47n207.h>
#endif

static void pch_enable_lpc(void)
{
	/* Set COM1/COM2 decode range */
	pci_write_config16(PCH_LPC_DEV, LPC_IO_DEC, 0x0010);

#if CONFIG_DRIVERS_UART_8250IO
	/* Enable SuperIO + EC + KBC + COM1 + lpc47n207 config*/
	pci_write_config16(PCH_LPC_DEV, LPC_EN, CNF1_LPC_EN | MC_LPC_EN |
		KBC_LPC_EN | CNF2_LPC_EN | COMA_LPC_EN);

	/* map full 256 bytes at 0x1600 to the LPC bus */
	pci_write_config32(PCH_LPC_DEV, LPC_GEN1_DEC, 0xfc1601);

	try_enabling_LPC47N207_uart();
#else
	/* Enable SuperIO + EC + KBC */
	pci_write_config16(PCH_LPC_DEV, LPC_EN, CNF1_LPC_EN | MC_LPC_EN |
		KBC_LPC_EN);
#endif
}

static void rcba_config(void)
{
	u32 reg32;

	southbridge_configure_default_intmap();

	/* Enable IOAPIC (generic) */
	RCBA16(OIC) = 0x0100;
	/* PCH BWG says to read back the IOAPIC enable register */
	(void) RCBA16(OIC);

	/* Disable unused devices (board specific) */
	reg32 = RCBA32(FD);
	reg32 |= PCH_DISABLE_ALWAYS;
	RCBA32(FD) = reg32;
}

static void early_pch_init(void)
{
	u8 reg8;

	// reset rtc power status
	reg8 = pci_read_config8(PCH_LPC_DEV, 0xa4);
	reg8 &= ~(1 << 2);
	pci_write_config8(PCH_LPC_DEV, 0xa4, reg8);
}

#include <cpu/intel/romstage.h>
void main(unsigned long bist)
{
	int boot_mode = 0;
	int cbmem_was_initted;

	struct pei_data pei_data = {
		.pei_version = PEI_VERSION,
		.mchbar = (uintptr_t)DEFAULT_MCHBAR,
		.dmibar = (uintptr_t)DEFAULT_DMIBAR,
		.epbar = DEFAULT_EPBAR,
		.pciexbar = CONFIG_MMCONF_BASE_ADDRESS,
		.smbusbar = SMBUS_IO_BASE,
		.wdbbar = 0x4000000,
		.wdbsize = 0x1000,
		.hpet_address = CONFIG_HPET_ADDRESS,
		.rcba = (uintptr_t)DEFAULT_RCBABASE,
		.pmbase = DEFAULT_PMBASE,
		.gpiobase = DEFAULT_GPIOBASE,
		.thermalbase = 0xfed08000,
		.system_type = 0, // 0 Mobile, 1 Desktop/Server
		.tseg_size = CONFIG_SMM_TSEG_SIZE,
		.spd_addresses = { 0xa0, 0x00,0x00,0x00 },
		.ts_addresses = { 0x30, 0x00, 0x00, 0x00 },
		.ec_present = 1,
		// 0 = leave channel enabled
		// 1 = disable dimm 0 on channel
		// 2 = disable dimm 1 on channel
		// 3 = disable dimm 0+1 on channel
		.dimm_channel0_disabled = 2,
		.dimm_channel1_disabled = 2,
		.max_ddr3_freq = 1333,
		.usb_port_config = {
			{ 1, 0, 0x0080 }, /* P0: Port 0      (OC0) */
			{ 1, 1, 0x0080 }, /* P1: Port 1      (OC1) */
			{ 1, 0, 0x0040 }, /* P2: MINIPCIE1   (no OC) */
			{ 1, 0, 0x0040 }, /* P3: MMC         (no OC) */
			{ 0, 0, 0x0000 }, /* P4: Empty */
			{ 0, 0, 0x0000 }, /* P5: Empty */
			{ 0, 0, 0x0000 }, /* P6: Empty */
			{ 0, 0, 0x0000 }, /* P7: Empty */
			{ 1, 4, 0x0040 }, /* P8: MINIPCIE2   (no OC) */
			{ 0, 4, 0x0000 }, /* P9: Empty */
			{ 0, 4, 0x0000 }, /* P10: Empty */
			{ 1, 4, 0x0040 }, /* P11: Camera     (no OC) */
			{ 0, 4, 0x0000 }, /* P12: Empty */
			{ 0, 4, 0x0000 }, /* P13: Empty */
		},
	};

	typedef const uint8_t spd_blob[256];
	spd_blob *spd_data;
	size_t spd_file_len;


	timestamp_init(get_initial_timestamp());
	timestamp_add_now(TS_START_ROMSTAGE);

	if (bist == 0)
		enable_lapic();

	pch_enable_lpc();

	/* Enable GPIOs */
	pci_write_config32(PCH_LPC_DEV, GPIO_BASE, DEFAULT_GPIOBASE|1);
	pci_write_config8(PCH_LPC_DEV, GPIO_CNTL, 0x10);
	setup_pch_gpios(&lumpy_gpio_map);

	console_init();

	init_bootmode_straps();

	/* 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;

		/* System is not happy after keyboard reset... */
		printk(BIOS_DEBUG, "Issuing CF9 warm reset\n");
		outb(0x6, 0xcf9);
		halt();
	}

	/* Perform some early chipset initialization required
	 * before RAM initialization can work
	 */
	sandybridge_early_initialization(SANDYBRIDGE_MOBILE);
	printk(BIOS_DEBUG, "Back from sandybridge_early_initialization()\n");

	boot_mode = southbridge_detect_s3_resume() ? 2 : 0;

	post_code(0x38);
	/* Enable SPD ROMs and DDR-III DRAM */
	enable_smbus();

	/* Prepare USB controller early in S3 resume */
	if (boot_mode == 2)
		enable_usb_bar();

	u32 gp_lvl2 = inl(DEFAULT_GPIOBASE + 0x38);
	u8 gpio33, gpio41, gpio49;
	gpio33 = (gp_lvl2 >> (33-32)) & 1;
	gpio41 = (gp_lvl2 >> (41-32)) & 1;
	gpio49 = (gp_lvl2 >> (49-32)) & 1;
	printk(BIOS_DEBUG, "Memory Straps:\n");
	printk(BIOS_DEBUG, " - memory capacity %dGB\n",
		gpio33 ? 2 : 1);
	printk(BIOS_DEBUG, " - die revision %d\n",
		gpio41 ? 2 : 1);
	printk(BIOS_DEBUG, " - vendor %s\n",
		gpio49 ? "Samsung" : "Other");

	int spd_index = 0;

	switch ((gpio49 << 2) | (gpio41 << 1) | gpio33) {
	case 0: // Other 1G Rev 1
		spd_index = 0;
		break;
	case 2: // Other 1G Rev 2
		spd_index = 1;
		break;
	case 1: // Other 2G Rev 1
	case 3: // Other 2G Rev 2
		spd_index = 2;
		break;
	case 4: // Samsung 1G Rev 1
		spd_index = 3;
		break;
	case 6: // Samsung 1G Rev 2
		spd_index = 4;
		break;
	case 5: // Samsung 2G Rev 1
	case 7: // Samsung 2G Rev 2
		spd_index = 5;
		break;
	}

	spd_data = cbfs_get_file_content(CBFS_DEFAULT_MEDIA, "spd.bin",
					 CBFS_TYPE_SPD, &spd_file_len);
	if (!spd_data)
		die("SPD data not found.");
	if (spd_file_len < (spd_index + 1) * 256)
		die("Missing SPD data.");
	// leave onboard dimm address at f0, and copy spd data there.
	memcpy(pei_data.spd_data[0], spd_data[spd_index], 256);

	post_code(0x39);
	pei_data.boot_mode = boot_mode;
	timestamp_add_now(TS_BEFORE_INITRAM);
	sdram_initialize(&pei_data);

	timestamp_add_now(TS_AFTER_INITRAM);
	post_code(0x3a);
	/* Perform some initialization that must run before stage2 */
	early_pch_init();
	post_code(0x3b);

	rcba_config();
	post_code(0x3c);

	quick_ram_check();
	post_code(0x3e);

	cbmem_was_initted = !cbmem_recovery(boot_mode==2);
	if (boot_mode!=2)
		save_mrc_data(&pei_data);

	if (boot_mode == 2 && !cbmem_was_initted) {
		/* Failed S3 resume, reset to come up cleanly */
		outb(0x6, 0xcf9);
		halt();
	}
	northbridge_romstage_finalize(boot_mode==2);
	post_code(0x3f);
	if (CONFIG_LPC_TPM) {
		init_tpm(boot_mode == 2);
	}
	timestamp_add_now(TS_END_ROMSTAGE);
}