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

#include <acpi/acpi.h>
#include <acpi/acpi_gnvs.h>
#include <acpi/acpigen.h>
#include <arch/ioapic.h>
#include <device/mmio.h>
#include <arch/smp/mpspec.h>
#include <console/console.h>
#include <device/device.h>
#include <device/pci_ops.h>
#include <intelblocks/cpulib.h>
#include <intelblocks/pmclib.h>
#include <intelblocks/acpi.h>
#include <soc/cpu.h>
#include <soc/iomap.h>
#include <soc/nvs.h>
#include <soc/pci_devs.h>
#include <soc/pm.h>
#include <soc/soc_chip.h>
#include <soc/systemagent.h>
#include <cpu/cpu.h>
#include <types.h>


#define DEFAULT_CPU_D_STATE	D0
#define LPI_STATES_ALL		0xff
#define LPI_REVISION		0
#define LPI_ENABLED		1


/*
 * List of supported C-states in this processor.
 */
enum {
	C_STATE_C0,		/* 0 */
	C_STATE_C1,		/* 1 */
	C_STATE_C1E,		/* 2 */
	C_STATE_C6_SHORT_LAT,	/* 3 */
	C_STATE_C6_LONG_LAT,	/* 4 */
	C_STATE_C7_SHORT_LAT,	/* 5 */
	C_STATE_C7_LONG_LAT,	/* 6 */
	C_STATE_C7S_SHORT_LAT,	/* 7 */
	C_STATE_C7S_LONG_LAT,	/* 8 */
	C_STATE_C8,		/* 9 */
	C_STATE_C9,		/* 10 */
	C_STATE_C10,		/* 11 */
	NUM_C_STATES
};

static const acpi_cstate_t cstate_map[NUM_C_STATES] = {
	[C_STATE_C0] = {},
	[C_STATE_C1] = {
		.latency = C1_LATENCY,
		.power = C1_POWER,
		.resource = MWAIT_RES(0, 0),
	},
	[C_STATE_C1E] = {
		.latency = C1_LATENCY,
		.power = C1_POWER,
		.resource = MWAIT_RES(0, 1),
	},
	[C_STATE_C6_SHORT_LAT] = {
		.latency = C6_LATENCY,
		.power = C6_POWER,
		.resource = MWAIT_RES(2, 0),
	},
	[C_STATE_C6_LONG_LAT] = {
		.latency = C6_LATENCY,
		.power = C6_POWER,
		.resource = MWAIT_RES(2, 1),
	},
	[C_STATE_C7_SHORT_LAT] = {
		.latency = C7_LATENCY,
		.power = C7_POWER,
		.resource = MWAIT_RES(3, 0),
	},
	[C_STATE_C7_LONG_LAT] = {
		.latency = C7_LATENCY,
		.power = C7_POWER,
		.resource = MWAIT_RES(3, 1),
	},
	[C_STATE_C7S_SHORT_LAT] = {
		.latency = C7_LATENCY,
		.power = C7_POWER,
		.resource = MWAIT_RES(3, 2),
	},
	[C_STATE_C7S_LONG_LAT] = {
		.latency = C7_LATENCY,
		.power = C7_POWER,
		.resource = MWAIT_RES(3, 3),
	},
	[C_STATE_C8] = {
		.latency = C8_LATENCY,
		.power = C8_POWER,
		.resource = MWAIT_RES(4, 0),
	},
	[C_STATE_C9] = {
		.latency = C9_LATENCY,
		.power = C9_POWER,
		.resource = MWAIT_RES(5, 0),
	},
	[C_STATE_C10] = {
		.latency = C10_LATENCY,
		.power = C10_POWER,
		.resource = MWAIT_RES(6, 0),
	},
};

static int cstate_set_non_s0ix[] = {
	C_STATE_C1,
	C_STATE_C6_LONG_LAT,
	C_STATE_C7S_LONG_LAT
};

static int cstate_set_s0ix[] = {
	C_STATE_C1,
	C_STATE_C6_LONG_LAT,
	C_STATE_C10
};

enum dev_sleep_states {
	D0,  /* 0 */
	D1,  /* 1 */
	D2,  /* 2 */
	D3,  /* 3 */
	NONE
};

const acpi_cstate_t *soc_get_cstate_map(size_t *entries)
{
	static acpi_cstate_t map[MAX(ARRAY_SIZE(cstate_set_s0ix),
				ARRAY_SIZE(cstate_set_non_s0ix))];
	int *set;
	int i;

	config_t *config = config_of_soc();

	int is_s0ix_enable = config->s0ix_enable;

	if (is_s0ix_enable) {
		*entries = ARRAY_SIZE(cstate_set_s0ix);
		set = cstate_set_s0ix;
	} else {
		*entries = ARRAY_SIZE(cstate_set_non_s0ix);
		set = cstate_set_non_s0ix;
	}

	for (i = 0; i < *entries; i++) {
		map[i] = cstate_map[set[i]];
		map[i].ctype = i + 1;
	}
	return map;
}

void soc_power_states_generation(int core_id, int cores_per_package)
{
	config_t *config = config_of_soc();

	if (config->eist_enable)
		/* Generate P-state tables */
		generate_p_state_entries(core_id, cores_per_package);
}

void soc_fill_fadt(acpi_fadt_t *fadt)
{
	const uint16_t pmbase = ACPI_BASE_ADDRESS;

	config_t *config = config_of_soc();

	fadt->pm_tmr_blk = pmbase + PM1_TMR;
	fadt->pm_tmr_len = 4;
	fadt->x_pm_tmr_blk.space_id = ACPI_ADDRESS_SPACE_IO;
	fadt->x_pm_tmr_blk.bit_width = fadt->pm_tmr_len * 8;
	fadt->x_pm_tmr_blk.bit_offset = 0;
	fadt->x_pm_tmr_blk.access_size = ACPI_ACCESS_SIZE_DWORD_ACCESS;
	fadt->x_pm_tmr_blk.addrl = fadt->pm_tmr_blk;
	fadt->x_pm_tmr_blk.addrh = 0x0;

	if (config->s0ix_enable)
		fadt->flags |= ACPI_FADT_LOW_PWR_IDLE_S0;
}

static const struct {
	uint8_t pci_dev;
	enum dev_sleep_states min_sleep_state;
} min_pci_sleep_states[] = {
	{ SA_DEVFN_ROOT,	D3 },
	{ SA_DEVFN_CPU_PCIE1_0,	D3 },
	{ SA_DEVFN_IGD,		D3 },
	{ SA_DEVFN_DPTF,	D3 },
	{ SA_DEVFN_IPU,		D3 },
	{ SA_DEVFN_CPU_PCIE6_0,	D3 },
	{ SA_DEVFN_CPU_PCIE6_2,	D3 },
	{ SA_DEVFN_TBT0,	D3 },
	{ SA_DEVFN_TBT1,	D3 },
	{ SA_DEVFN_TBT2,	D3 },
	{ SA_DEVFN_TBT3,	D3 },
	{ SA_DEVFN_GNA,		D3 },
	{ SA_DEVFN_TCSS_XHCI,	D3 },
	{ SA_DEVFN_TCSS_XDCI,	D3 },
	{ SA_DEVFN_TCSS_DMA0,	D3 },
	{ SA_DEVFN_TCSS_DMA1,	D3 },
	{ SA_DEVFN_VMD,		D3 },
	{ PCH_DEVFN_I2C6,	D3 },
	{ PCH_DEVFN_I2C7,	D3 },
	{ PCH_DEVFN_THC0,	D3 },
	{ PCH_DEVFN_THC1,	D3 },
	{ PCH_DEVFN_XHCI,	D3 },
	{ PCH_DEVFN_USBOTG,	D3 },
	{ PCH_DEVFN_SRAM,	D3 },
	{ PCH_DEVFN_CNVI_WIFI,	D3 },
	{ PCH_DEVFN_I2C0,	D3 },
	{ PCH_DEVFN_I2C1,	D3 },
	{ PCH_DEVFN_I2C2,	D3 },
	{ PCH_DEVFN_I2C3,	D3 },
	{ PCH_DEVFN_CSE,	D0 },
	{ PCH_DEVFN_SATA,	D3 },
	{ PCH_DEVFN_I2C4,	D3 },
	{ PCH_DEVFN_I2C5,	D3 },
	{ PCH_DEVFN_UART2,	D3 },
	{ PCH_DEVFN_PCIE1,	D0 },
	{ PCH_DEVFN_PCIE2,	D0 },
	{ PCH_DEVFN_PCIE3,	D0 },
	{ PCH_DEVFN_PCIE4,	D0 },
	{ PCH_DEVFN_PCIE5,	D0 },
	{ PCH_DEVFN_PCIE6,	D0 },
	{ PCH_DEVFN_PCIE7,	D0 },
	{ PCH_DEVFN_PCIE8,	D0 },
	{ PCH_DEVFN_PCIE9,	D0 },
	{ PCH_DEVFN_PCIE10,	D0 },
	{ PCH_DEVFN_PCIE11,	D0 },
	{ PCH_DEVFN_PCIE12,	D0 },
	{ PCH_DEVFN_UART0,	D3 },
	{ PCH_DEVFN_UART1,	D3 },
	{ PCH_DEVFN_GSPI0,	D3 },
	{ PCH_DEVFN_GSPI1,	D3 },
	{ PCH_DEVFN_ESPI,	D0 },
	{ PCH_DEVFN_PMC,	D0 },
	{ PCH_DEVFN_HDA,	D0 },
	{ PCH_DEVFN_SPI,	D3 },
	{ PCH_DEVFN_GBE,	D3 },
};

static enum dev_sleep_states get_min_sleep_state(const struct device *dev)
{
	if (!is_dev_enabled(dev))
		return NONE;

	switch (dev->path.type) {
	case DEVICE_PATH_APIC:
		return DEFAULT_CPU_D_STATE;

	case DEVICE_PATH_PCI:
		/* skip external buses*/
		if (dev->bus->secondary != 0)
			return NONE;
		for (size_t i = 0; i < ARRAY_SIZE(min_pci_sleep_states); i++)
			if (min_pci_sleep_states[i].pci_dev == dev->path.pci.devfn)
				return min_pci_sleep_states[i].min_sleep_state;
		printk(BIOS_WARNING, "Unknown min d_state for %x\n", dev->path.pci.devfn);
		return NONE;

	default:
		return NONE;
	}
}

/* Generate the LPI constraint table and return the number of devices included */
void soc_lpi_get_constraints(void *unused)
{
	unsigned int num_entries;
	const struct device *dev;
	enum dev_sleep_states min_sleep_state;

	num_entries = 0;

	for (dev = all_devices; dev; dev = dev->next) {
		if (get_min_sleep_state(dev) != NONE)
			num_entries++;
	}

	acpigen_emit_byte(RETURN_OP);
	acpigen_write_package(num_entries);

	size_t cpu_index = 0;
	for (dev = all_devices; dev; dev = dev->next) {
		min_sleep_state = get_min_sleep_state(dev);
		if (min_sleep_state == NONE)
			continue;

		acpigen_write_package(3);
		{
			char path[32] = { 0 };
			/* Emit the device path */
			switch (dev->path.type) {
			case DEVICE_PATH_PCI:
				acpigen_emit_namestring(acpi_device_path(dev));
				break;

			case DEVICE_PATH_APIC:
				snprintf(path, sizeof(path), CONFIG_ACPI_CPU_STRING,
					 cpu_index++);
				acpigen_emit_namestring(path);
				break;

			default:
				/* Unhandled */
				printk(BIOS_WARNING,
					"Unhandled device path type %d\n", dev->path.type);
				acpigen_emit_namestring(NULL);
				break;
			}

			acpigen_write_integer(LPI_ENABLED);
			acpigen_write_package(2);
			{
				acpigen_write_integer(LPI_REVISION);
				acpigen_write_package(2);	/* no optional device info */
				{
					/* Assume constraints apply to all entries */
					acpigen_write_integer(LPI_STATES_ALL);
					acpigen_write_integer(min_sleep_state); /* min D-state */
				}
				acpigen_write_package_end();
			}
			acpigen_write_package_end();
		}
		acpigen_write_package_end();
	}

	acpigen_write_package_end();
	printk(BIOS_INFO, "Returning SoC specific constraint package for %d devices\n", num_entries);
}

uint32_t soc_read_sci_irq_select(void)
{
	return read32p(soc_read_pmc_base() + IRQ_REG);
}

static unsigned long soc_fill_dmar(unsigned long current)
{
	const uint64_t gfxvtbar = MCHBAR64(GFXVTBAR) & VTBAR_MASK;
	const bool gfxvten = MCHBAR32(GFXVTBAR) & VTBAR_ENABLED;

	if (is_devfn_enabled(SA_DEVFN_IGD) && gfxvtbar && gfxvten) {
		const unsigned long tmp = current;

		current += acpi_create_dmar_drhd(current, 0, 0, gfxvtbar);
		current += acpi_create_dmar_ds_pci(current, 0, SA_DEV_SLOT_IGD, 0);

		acpi_dmar_drhd_fixup(tmp, current);
	}

	const uint64_t ipuvtbar = MCHBAR64(IPUVTBAR) & VTBAR_MASK;
	const bool ipuvten = MCHBAR32(IPUVTBAR) & VTBAR_ENABLED;

	if (is_devfn_enabled(SA_DEVFN_IPU) && ipuvtbar && ipuvten) {
		const unsigned long tmp = current;

		current += acpi_create_dmar_drhd(current, 0, 0, ipuvtbar);
		current += acpi_create_dmar_ds_pci(current, 0, SA_DEV_SLOT_IPU, 0);

		acpi_dmar_drhd_fixup(tmp, current);
	}

	/* TCSS Thunderbolt root ports */
	for (unsigned int i = 0; i < MAX_TBT_PCIE_PORT; i++) {
		if (is_devfn_enabled(SA_DEVFN_TBT(i))) {
			const uint64_t tbtbar = MCHBAR64(TBTxBAR(i)) & VTBAR_MASK;
			const bool tbten = MCHBAR32(TBTxBAR(i)) & VTBAR_ENABLED;
			if (tbtbar && tbten) {
				const unsigned long tmp = current;

				current += acpi_create_dmar_drhd(current, 0, 0, tbtbar);
				current += acpi_create_dmar_ds_pci_br(current, 0,
								      SA_DEV_SLOT_TBT, i);

				acpi_dmar_drhd_fixup(tmp, current);
			}
		}
	}

	const uint64_t vtvc0bar = MCHBAR64(VTVC0BAR) & VTBAR_MASK;
	const bool vtvc0en = MCHBAR32(VTVC0BAR) & VTBAR_ENABLED;

	if (vtvc0bar && vtvc0en) {
		const unsigned long tmp = current;

		current += acpi_create_dmar_drhd(current,
				DRHD_INCLUDE_PCI_ALL, 0, vtvc0bar);
		current += acpi_create_dmar_ds_ioapic_from_hw(current,
				IO_APIC_ADDR, V_P2SB_CFG_IBDF_BUS, V_P2SB_CFG_IBDF_DEV,
				V_P2SB_CFG_IBDF_FUNC);
		current += acpi_create_dmar_ds_msi_hpet(current,
				0, V_P2SB_CFG_HBDF_BUS, V_P2SB_CFG_HBDF_DEV,
				V_P2SB_CFG_HBDF_FUNC);

		acpi_dmar_drhd_fixup(tmp, current);
	}

	/* Add RMRR entry */
	if (is_devfn_enabled(SA_DEVFN_IGD)) {
		const unsigned long tmp = current;
		current += acpi_create_dmar_rmrr(current, 0,
				sa_get_gsm_base(), sa_get_tolud_base() - 1);
		current += acpi_create_dmar_ds_pci(current, 0, SA_DEV_SLOT_IGD, 0);
		acpi_dmar_rmrr_fixup(tmp, current);
	}

	return current;
}

unsigned long sa_write_acpi_tables(const struct device *dev, unsigned long current,
				   struct acpi_rsdp *rsdp)
{
	acpi_dmar_t *const dmar = (acpi_dmar_t *)current;

	/*
	 * Create DMAR table only if we have VT-d capability and FSP does not override its
	 * feature.
	 */
	if ((pci_read_config32(dev, CAPID0_A) & VTD_DISABLE) ||
	    !(MCHBAR32(VTVC0BAR) & VTBAR_ENABLED))
		return current;

	printk(BIOS_DEBUG, "ACPI:    * DMAR\n");
	acpi_create_dmar(dmar, DMAR_INTR_REMAP | DMA_CTRL_PLATFORM_OPT_IN_FLAG, soc_fill_dmar);
	current += dmar->header.length;
	current = acpi_align_current(current);
	acpi_add_table(rsdp, dmar);

	return current;
}

void soc_fill_gnvs(struct global_nvs *gnvs)
{
	config_t *config = config_of_soc();

	/* Enable DPTF based on mainboard configuration */
	gnvs->dpte = config->dptf_enable;

	/* Set USB2/USB3 wake enable bitmaps. */
	gnvs->u2we = config->usb2_wake_enable_bitmap;
	gnvs->u3we = config->usb3_wake_enable_bitmap;
}

int soc_madt_sci_irq_polarity(int sci)
{
	return MP_IRQ_POLARITY_HIGH;
}