/* SPDX-License-Identifier: GPL-2.0-only */

#include <bootstate.h>
#include <console/console.h>
#include <device/pci_ops.h>
#include <elog.h>
#include <intelblocks/pmclib.h>
#include <intelblocks/xhci.h>
#include <soc/pci_devs.h>
#include <soc/pm.h>
#include <stdint.h>
#include <types.h>

struct pme_map {
	unsigned int devfn;
	unsigned int wake_source;
};

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_GPE, i + start);
	}
}

static void pch_log_rp_wake_source(void)
{
	size_t i;

	const struct pme_map pme_map[] = {
		{ PCH_DEVFN_PCIE1, ELOG_WAKE_SOURCE_PME_PCIE1 },
		{ PCH_DEVFN_PCIE2, ELOG_WAKE_SOURCE_PME_PCIE2 },
		{ PCH_DEVFN_PCIE3, ELOG_WAKE_SOURCE_PME_PCIE3 },
		{ PCH_DEVFN_PCIE4, ELOG_WAKE_SOURCE_PME_PCIE4 },
		{ PCH_DEVFN_PCIE5, ELOG_WAKE_SOURCE_PME_PCIE5 },
		{ PCH_DEVFN_PCIE6, ELOG_WAKE_SOURCE_PME_PCIE6 },
		{ PCH_DEVFN_PCIE7, ELOG_WAKE_SOURCE_PME_PCIE7 },
		{ PCH_DEVFN_PCIE8, ELOG_WAKE_SOURCE_PME_PCIE8 },
		{ PCH_DEVFN_PCIE9, ELOG_WAKE_SOURCE_PME_PCIE9 },
		{ PCH_DEVFN_PCIE10, ELOG_WAKE_SOURCE_PME_PCIE10 },
		{ PCH_DEVFN_PCIE11, ELOG_WAKE_SOURCE_PME_PCIE11 },
		{ PCH_DEVFN_PCIE12, ELOG_WAKE_SOURCE_PME_PCIE12 },
	};

	for (i = 0; i < MIN(CONFIG_MAX_ROOT_PORTS, ARRAY_SIZE(pme_map)); ++i) {
		if (pci_dev_is_wake_source(PCI_DEV(0, PCI_SLOT(pme_map[i].devfn),
						   PCI_FUNC(pme_map[i].devfn))))
			elog_add_event_wake(pme_map[i].wake_source, 0);
	}
}

static void pch_log_pme_internal_wake_source(void)
{
	const struct pme_map ipme_map[] = {
		{ PCH_DEVFN_HDA,	ELOG_WAKE_SOURCE_PME_HDA },
		{ PCH_DEVFN_GBE,	ELOG_WAKE_SOURCE_PME_GBE },
		{ PCH_DEVFN_SATA,	ELOG_WAKE_SOURCE_PME_SATA },
		{ PCH_DEVFN_CSE,	ELOG_WAKE_SOURCE_PME_CSE },
		{ PCH_DEVFN_USBOTG,	ELOG_WAKE_SOURCE_PME_XDCI },
		{ PCH_DEVFN_CNVI_WIFI,	ELOG_WAKE_SOURCE_PME_WIFI },
		{ SA_DEVFN_TCSS_XDCI,	ELOG_WAKE_SOURCE_PME_TCSS_XDCI },
	};
	const struct xhci_wake_info xhci_wake_info[] = {
		{ PCH_DEVFN_XHCI,	ELOG_WAKE_SOURCE_PME_XHCI },
		{ SA_DEVFN_TCSS_XHCI,	ELOG_WAKE_SOURCE_PME_TCSS_XHCI },
	};
	bool dev_found = false;
	size_t i;

	for (i = 0; i < ARRAY_SIZE(ipme_map); i++) {
		if (pci_dev_is_wake_source(PCI_DEV(0, PCI_SLOT(ipme_map[i].devfn),
						   PCI_FUNC(ipme_map[i].devfn)))) {
			elog_add_event_wake(ipme_map[i].wake_source, 0);
			dev_found = true;
		}
	}

	/* Check Thunderbolt ports */
	for (i = 0; i < NUM_TBT_FUNCTIONS; i++) {
		const unsigned int devfn = SA_DEVFN_TBT(i);
		if (pci_dev_is_wake_source(PCI_DEV(0, PCI_SLOT(devfn), PCI_FUNC(devfn)))) {
			elog_add_event_wake(ELOG_WAKE_SOURCE_PME_TBT, i);
			dev_found = true;
		}
	}

	/* Check DMA devices */
	for (i = 0; i < NUM_TCSS_DMA_FUNCTIONS; i++) {
		const unsigned int devfn = SA_DEVFN_TCSS_DMA(i);
		if (pci_dev_is_wake_source(PCI_DEV(0, PCI_SLOT(devfn), PCI_FUNC(devfn)))) {
			elog_add_event_wake(ELOG_WAKE_SOURCE_PME_TCSS_DMA, i);
			dev_found = true;
		}
	}

	/*
	 * Check the XHCI controllers' USB2 & USB3 ports for wake events. There
	 * are cases (GSMI logging for S0ix clears PME_STS_BIT) where the XHCI
	 * controller's PME_STS_BIT may have already been cleared, so the host
	 * controller wake wouldn't get logged here; therefore, the host
	 * controller wake event is logged before its corresponding port wake
	 * event is logged.
	 */
	dev_found |= xhci_update_wake_event(xhci_wake_info,
					    ARRAY_SIZE(xhci_wake_info));

	if (!dev_found)
		elog_add_event_wake(ELOG_WAKE_SOURCE_PME_INTERNAL, 0);
}

static void pch_log_wake_source(const 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)
		pch_log_rp_wake_source();

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

	/* Internal PME */
	if (ps->gpe0_sts[GPE_STD] & PME_B0_STS)
		pch_log_pme_internal_wake_source();

	/* 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_95_64], ps->gpe0_en[GPE_95_64], 64);
	/* Treat the STD as an extension of GPIO to obtain visibility. */
	pch_log_gpio_gpe(ps->gpe0_sts[GPE_STD], ps->gpe0_en[GPE_STD], 96);
}

static void pch_log_power_and_resets(const struct chipset_power_state *ps)
{
	/* Thermal Trip */
	if (ps->gblrst_cause[0] & GBLRST_CAUSE0_THERMTRIP)
		elog_add_event(ELOG_TYPE_THERM_TRIP);

	/* CSME-Initiated Host Reset with power down */
	if (ps->hpr_cause0 & HPR_CAUSE0_MI_HRPD)
		elog_add_event(ELOG_TYPE_MI_HRPD);

	/* CSME-Initiated Host Reset with power cycle */
	if (ps->hpr_cause0 & HPR_CAUSE0_MI_HRPC)
		elog_add_event(ELOG_TYPE_MI_HRPC);

	/* CSME-Initiated Host Reset without power cycle */
	if (ps->hpr_cause0 & HPR_CAUSE0_MI_HR)
		elog_add_event(ELOG_TYPE_MI_HR);

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

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

	/* TCO Timeout */
	if (ps->prev_sleep_state != ACPI_S3 &&
	    ps->tco2_sts & TCO_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_pmcon_b & RTC_BATTERY_DEAD)
		elog_add_event(ELOG_TYPE_RTC_RESET);

	/* Host Reset Status */
	if (ps->gen_pmcon_a & HOST_RST_STS)
		elog_add_event(ELOG_TYPE_SYSTEM_RESET);

	/* ACPI Wake Event */
	if (ps->prev_sleep_state != ACPI_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 = pmc_get_power_state();

	if (!ps) {
		printk(BIOS_ERR, "chipset_power_state not found!\n");
		return;
	}

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

	/* Wake Sources */
	if (ps->prev_sleep_state > ACPI_S0)
		pch_log_wake_source(ps);
}

BOOT_STATE_INIT_ENTRY(BS_DEV_INIT, BS_ON_EXIT, pch_log_state, NULL);

void elog_gsmi_cb_platform_log_wake_source(void)
{
	struct chipset_power_state ps;
	pmc_fill_pm_reg_info(&ps);
	pch_log_wake_source(&ps);
}