/*
 * This file is part of the coreboot project.
 *
 * Copyright (C) 2014 Google Inc.
 *
 * 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
 */

#include <bootstate.h>
#include <cbmem.h>
#include <console/console.h>
#include <stdint.h>
#include <elog.h>
#include <broadwell/lpc.h>
#include <broadwell/pm.h>

static void pch_log_gpio_gpe(u32 gpe0_sts, u32 gpe0_en, int start)
{
	int i;

	gpe0_sts &= gpe0_en;

	for (i = 0; i <= 31; i++) {
		if (gpe0_sts & (1 << i))
			elog_add_event_wake(ELOG_WAKE_SOURCE_GPIO, i + start);
	}
}

static void pch_log_wake_source(struct chipset_power_state *ps)
{
	/* Power Button */
	if (ps->pm1_sts & PWRBTN_STS)
		elog_add_event_wake(ELOG_WAKE_SOURCE_PWRBTN, 0);

	/* RTC */
	if (ps->pm1_sts & RTC_STS)
		elog_add_event_wake(ELOG_WAKE_SOURCE_RTC, 0);

	/* PCI Express (TODO: determine wake device) */
	if (ps->pm1_sts & PCIEXPWAK_STS)
		elog_add_event_wake(ELOG_WAKE_SOURCE_PCIE, 0);

	/* PME (TODO: determine wake device) */
	if (ps->gpe0_sts[GPE_STD] & PME_STS)
		elog_add_event_wake(ELOG_WAKE_SOURCE_PME, 0);

	/* Internal PME (TODO: determine wake device) */
	if (ps->gpe0_sts[GPE_STD] & PME_B0_STS)
		elog_add_event_wake(ELOG_WAKE_SOURCE_PME_INTERNAL, 0);

	/* SMBUS Wake */
	if (ps->gpe0_sts[GPE_STD] & SMB_WAK_STS)
		elog_add_event_wake(ELOG_WAKE_SOURCE_SMBUS, 0);

	/* Log GPIO events in set 1-3 */
	pch_log_gpio_gpe(ps->gpe0_sts[GPE_31_0], ps->gpe0_en[GPE_31_0], 0);
	pch_log_gpio_gpe(ps->gpe0_sts[GPE_63_32], ps->gpe0_en[GPE_63_32], 32);
	pch_log_gpio_gpe(ps->gpe0_sts[GPE_94_64], ps->gpe0_en[GPE_94_64], 64);
}

static void pch_log_power_and_resets(struct chipset_power_state *ps)
{
	/* Thermal Trip Status */
	if (ps->gen_pmcon2 & THERMTRIP_STS)
		elog_add_event(ELOG_TYPE_THERM_TRIP);

	/* PWR_FLR Power Failure */
	if (ps->gen_pmcon2 & PWROK_FLR)
		elog_add_event(ELOG_TYPE_POWER_FAIL);

	/* SUS Well Power Failure */
	if (ps->gen_pmcon3 & SUS_PWR_FLR)
		elog_add_event(ELOG_TYPE_SUS_POWER_FAIL);

	/* SYS_PWROK Failure */
	if (ps->gen_pmcon2 & SYSPWR_FLR)
		elog_add_event(ELOG_TYPE_SYS_PWROK_FAIL);

	/* PWROK Failure */
	if (ps->gen_pmcon2 & PWROK_FLR)
		elog_add_event(ELOG_TYPE_PWROK_FAIL);

	/* Second TCO Timeout */
	if (ps->tco2_sts & TCO2_STS_SECOND_TO)
		elog_add_event(ELOG_TYPE_TCO_RESET);

	/* Power Button Override */
	if (ps->pm1_sts & PRBTNOR_STS)
		elog_add_event(ELOG_TYPE_POWER_BUTTON_OVERRIDE);

	/* RTC reset */
	if (ps->gen_pmcon3 & RTC_BATTERY_DEAD)
		elog_add_event(ELOG_TYPE_RTC_RESET);

	/* System Reset Status (reset button pushed) */
	if (ps->gen_pmcon2 & SYSTEM_RESET_STS)
		elog_add_event(ELOG_TYPE_RESET_BUTTON);

	/* General Reset Status */
	if (ps->gen_pmcon3 & GEN_RST_STS)
		elog_add_event(ELOG_TYPE_SYSTEM_RESET);

	/* ACPI Wake Event */
	if (ps->prev_sleep_state != SLEEP_STATE_S0)
		elog_add_event_byte(ELOG_TYPE_ACPI_WAKE, ps->prev_sleep_state);
}

static void pch_log_state(void *unused)
{
	struct chipset_power_state *ps = cbmem_find(CBMEM_ID_POWER_STATE);

	if (ps == NULL) {
		printk(BIOS_ERR, "Not logging power state information. "
		       "Power state not found in cbmem.\n");
		return;
	}

	/* Power and Reset */
	pch_log_power_and_resets(ps);

	/* Wake Sources */
	pch_log_wake_source(ps);
}

BOOT_STATE_INIT_ENTRIES(pch_log) = {
	BOOT_STATE_INIT_ENTRY(BS_DEV_INIT, BS_ON_ENTRY, pch_log_state, NULL)
};