package main

import "fmt"

type LPVariant int

const (
	LYNX_POINT_MOBILE LPVariant = iota
	LYNX_POINT_DESKTOP
	LYNX_POINT_SERVER
	LYNX_POINT_ULT
)

type lynxpoint struct {
	variant LPVariant
	node    *DevTreeNode
}

func lpPchGetFlashSize(ctx Context) {
	inteltool := ctx.InfoSource.GetInteltool()
	/* In LP PCH, Boot BIOS Straps field in GCS has only one bit.  */
	switch (inteltool.RCBA[0x3410] >> 10) & 1 {
	case 0:
		ROMProtocol = "SPI"
		highflkb := uint32(0)
		for reg := uint16(0); reg < 5; reg++ {
			fl := (inteltool.RCBA[0x3854+4*reg] >> 16) & 0x1fff
			flkb := (fl + 1) << 2
			if flkb > highflkb {
				highflkb = flkb
			}
		}
		ROMSizeKB = int(highflkb)
		FlashROMSupport = "y"
	}
}

func (b lynxpoint) GetGPIOHeader() string {
	return "southbridge/intel/lynxpoint/pch.h"
}

func (b lynxpoint) EnableGPE(in int) {
	if b.variant != LYNX_POINT_ULT {
		b.node.Registers[fmt.Sprintf("gpi%d_routing", in)] = "2"
	}
}

func (b lynxpoint) EncodeGPE(in int) int {
	return in + 0x10
}

func (b lynxpoint) DecodeGPE(in int) int {
	return in - 0x10
}

func (b lynxpoint) NeedRouteGPIOManually() {
	b.node.Comment += ", FIXME: set gpiX_routing for EC support"
}

func GetLptDesktopEHCISetting(loc_param uint32, txamp uint32) (string, int) {
	var port_pos string
	var port_length int

	if loc_param == 4 {
		port_pos = "USB_PORT_BACK_PANEL"
		if txamp <= 2 {
			port_length = 0x40
		} else if txamp >= 4 {
			port_length = 0x140
		} else {
			port_length = 0x110
		}
	} else {
		port_pos = "USB_PORT_FLEX"
		port_length = 0x40
	}
	return port_pos, port_length
}

func GetLptMobileEHCISetting(loc_param uint32, txamp uint32) (string, int) {
	var port_pos string
	var port_length int

	if loc_param == 4 {
		port_pos = "USB_PORT_DOCK"
		if txamp <= 1 {
			port_length = 0x40
		} else {
			port_length = 0x80
		}
	} else if loc_param == 6 {
		/* not internal, not dock, port_length >= 0x70 */
		port_pos = "USB_PORT_BACK_PANEL"
		if txamp <= 2 {
			port_length = 0x80
		} else {
			port_length = 0x110
		}
	} else {
		port_pos = "USB_PORT_BACK_PANEL"
		port_length = 0x40
	}
	return port_pos, port_length
}

func GetLptLPEHCISetting(loc_param uint32, txamp uint32) (string, int) {
	var port_pos string
	var port_length int

	if loc_param == 6 {
		/* back panel or mini pcie, length >= 0x70 */
		port_pos = "USB_PORT_MINI_PCIE"
		if txamp <= 2 {
			port_length = 0x80
		} else {
			port_length = 0x110
		}
	} else if loc_param == 4 {
		port_pos = "USB_PORT_DOCK"
		if txamp <= 1 {
			port_length = 0x40
		} else {
			port_length = 0x80
		}
	} else {
		port_pos = "USB_PORT_BACK_PANEL"
		port_length = 0x40
	}
	return port_pos, port_length
}

func (b lynxpoint) Scan(ctx Context, addr PCIDevData) {

	SouthBridge = &b

	inteltool := ctx.InfoSource.GetInteltool()

	isULT := (b.variant == LYNX_POINT_ULT)

	if isULT {
		Lynxpoint_LP_GPIO(ctx, inteltool)
	} else {
		GPIO(ctx, inteltool)
	}

	KconfigBool["SOUTHBRIDGE_INTEL_LYNXPOINT"] = true
	if isULT {
		KconfigBool["INTEL_LYNXPOINT_LP"] = true
	}
	KconfigBool["SERIRQ_CONTINUOUS_MODE"] = true
	if isULT {
		KconfigInt["USBDEBUG_HCD_INDEX"] = 1
	} else {
		KconfigInt["USBDEBUG_HCD_INDEX"] = 2
		KconfigComment["USBDEBUG_HCD_INDEX"] = "FIXME: check this"
	}

	if isULT {
		lpPchGetFlashSize(ctx)
	} else {
		ich9GetFlashSize(ctx)
	}

	FADT := ctx.InfoSource.GetACPI()["FACP"]

	sp0dtle_data := (inteltool.IOBP[0xea002750] >> 24) & 0xf
	sp0dtle_edge := (inteltool.IOBP[0xea002754] >> 16) & 0xf
	sp1dtle_data := (inteltool.IOBP[0xea002550] >> 24) & 0xf
	sp1dtle_edge := (inteltool.IOBP[0xea002554] >> 16) & 0xf

	if sp0dtle_data != sp0dtle_edge {
		fmt.Printf("Different SATA Gen3 port0 DTLE data and edge values are used.\n")
	}

	if sp1dtle_data != sp1dtle_edge {
		fmt.Printf("Different SATA Gen3 port1 DTLE data and edge values are used.\n")
	}

	cur := DevTreeNode{
		Chip:    "southbridge/intel/lynxpoint",
		Comment: "Intel Series 8 Lynx Point PCH",

		/* alt_gp_smi_en is not generated because coreboot doesn't use SMI like OEM firmware */
		Registers: map[string]string{
			"gen1_dec":             FormatHexLE32(PCIMap[PCIAddr{Bus: 0, Dev: 0x1f, Func: 0}].ConfigDump[0x84:0x88]),
			"gen2_dec":             FormatHexLE32(PCIMap[PCIAddr{Bus: 0, Dev: 0x1f, Func: 0}].ConfigDump[0x88:0x8c]),
			"gen3_dec":             FormatHexLE32(PCIMap[PCIAddr{Bus: 0, Dev: 0x1f, Func: 0}].ConfigDump[0x8c:0x90]),
			"gen4_dec":             FormatHexLE32(PCIMap[PCIAddr{Bus: 0, Dev: 0x1f, Func: 0}].ConfigDump[0x90:0x94]),
			"sata_port_map":        fmt.Sprintf("0x%x", PCIMap[PCIAddr{Bus: 0, Dev: 0x1f, Func: 2}].ConfigDump[0x92]&0x3f),
			"docking_supported":    (FormatBool((FADT[113] & (1 << 1)) != 0)),
			"sata_port0_gen3_dtle": fmt.Sprintf("0x%x", sp0dtle_data),
			"sata_port1_gen3_dtle": fmt.Sprintf("0x%x", sp1dtle_data),
		},
		PCISlots: []PCISlot{
			PCISlot{PCIAddr: PCIAddr{Dev: 0x13, Func: 0}, writeEmpty: isULT, additionalComment: "Smart Sound Audio DSP"},
			PCISlot{PCIAddr: PCIAddr{Dev: 0x14, Func: 0}, writeEmpty: true, additionalComment: "xHCI Controller"},
			PCISlot{PCIAddr: PCIAddr{Dev: 0x15, Func: 0}, writeEmpty: isULT, additionalComment: "Serial I/O DMA"},
			PCISlot{PCIAddr: PCIAddr{Dev: 0x15, Func: 1}, writeEmpty: isULT, additionalComment: "I2C0"},
			PCISlot{PCIAddr: PCIAddr{Dev: 0x15, Func: 2}, writeEmpty: isULT, additionalComment: "I2C1"},
			PCISlot{PCIAddr: PCIAddr{Dev: 0x15, Func: 3}, writeEmpty: isULT, additionalComment: "GSPI0"},
			PCISlot{PCIAddr: PCIAddr{Dev: 0x15, Func: 4}, writeEmpty: isULT, additionalComment: "GSPI1"},
			PCISlot{PCIAddr: PCIAddr{Dev: 0x15, Func: 5}, writeEmpty: isULT, additionalComment: "UART0"},
			PCISlot{PCIAddr: PCIAddr{Dev: 0x15, Func: 6}, writeEmpty: isULT, additionalComment: "UART1"},
			PCISlot{PCIAddr: PCIAddr{Dev: 0x16, Func: 0}, writeEmpty: true, additionalComment: "Management Engine Interface 1"},
			PCISlot{PCIAddr: PCIAddr{Dev: 0x16, Func: 1}, writeEmpty: true, additionalComment: "Management Engine Interface 2"},
			PCISlot{PCIAddr: PCIAddr{Dev: 0x16, Func: 2}, writeEmpty: true, additionalComment: "Management Engine IDE-R"},
			PCISlot{PCIAddr: PCIAddr{Dev: 0x16, Func: 3}, writeEmpty: true, additionalComment: "Management Engine KT"},
			PCISlot{PCIAddr: PCIAddr{Dev: 0x17, Func: 0}, writeEmpty: isULT, additionalComment: "SDIO"},
			PCISlot{PCIAddr: PCIAddr{Dev: 0x19, Func: 0}, writeEmpty: true, additionalComment: "Intel Gigabit Ethernet"},
			PCISlot{PCIAddr: PCIAddr{Dev: 0x1a, Func: 0}, writeEmpty: !isULT, additionalComment: "USB2 EHCI #2"},
			PCISlot{PCIAddr: PCIAddr{Dev: 0x1b, Func: 0}, writeEmpty: true, additionalComment: "High Definition Audio"},
			PCISlot{PCIAddr: PCIAddr{Dev: 0x1c, Func: 0}, writeEmpty: true, additionalComment: "PCIe Port #1"},
			PCISlot{PCIAddr: PCIAddr{Dev: 0x1c, Func: 1}, writeEmpty: true, additionalComment: "PCIe Port #2"},
			PCISlot{PCIAddr: PCIAddr{Dev: 0x1c, Func: 2}, writeEmpty: true, additionalComment: "PCIe Port #3"},
			PCISlot{PCIAddr: PCIAddr{Dev: 0x1c, Func: 3}, writeEmpty: true, additionalComment: "PCIe Port #4"},
			PCISlot{PCIAddr: PCIAddr{Dev: 0x1c, Func: 4}, writeEmpty: true, additionalComment: "PCIe Port #5"},
			PCISlot{PCIAddr: PCIAddr{Dev: 0x1c, Func: 5}, writeEmpty: true, additionalComment: "PCIe Port #6"},
			PCISlot{PCIAddr: PCIAddr{Dev: 0x1c, Func: 6}, writeEmpty: !isULT, additionalComment: "PCIe Port #7"},
			PCISlot{PCIAddr: PCIAddr{Dev: 0x1c, Func: 7}, writeEmpty: !isULT, additionalComment: "PCIe Port #8"},
			PCISlot{PCIAddr: PCIAddr{Dev: 0x1d, Func: 0}, writeEmpty: true, additionalComment: "USB2 EHCI #1"},
			PCISlot{PCIAddr: PCIAddr{Dev: 0x1f, Func: 0}, writeEmpty: true, additionalComment: "LPC bridge"},
			PCISlot{PCIAddr: PCIAddr{Dev: 0x1f, Func: 2}, writeEmpty: true, additionalComment: "SATA Controller (AHCI)"},
			PCISlot{PCIAddr: PCIAddr{Dev: 0x1f, Func: 3}, writeEmpty: true, additionalComment: "SMBus"},
			PCISlot{PCIAddr: PCIAddr{Dev: 0x1f, Func: 5}, writeEmpty: !isULT, additionalComment: "SATA Controller (Legacy)"},
			PCISlot{PCIAddr: PCIAddr{Dev: 0x1f, Func: 6}, writeEmpty: true, additionalComment: "Thermal"},
		},
	}

	if isULT {
		cur.Registers["gpe0_en_1"] = fmt.Sprintf("0x%x", inteltool.PMBASE[0x90])
		cur.Registers["gpe0_en_2"] = fmt.Sprintf("0x%x", inteltool.PMBASE[0x94])
		cur.Registers["gpe0_en_3"] = fmt.Sprintf("0x%x", inteltool.PMBASE[0x98])
		cur.Registers["gpe0_en_4"] = fmt.Sprintf("0x%x", inteltool.PMBASE[0x9c])
	} else {
		cur.Registers["gpe0_en_1"] = fmt.Sprintf("0x%x", inteltool.PMBASE[0x28])
		cur.Registers["gpe0_en_2"] = fmt.Sprintf("0x%x", inteltool.PMBASE[0x2c])
	}

	b.node = &cur

	PutPCIChip(addr, cur)
	PutPCIDevParent(addr, "", "lpc")

	DSDTIncludes = append(DSDTIncludes, DSDTInclude{
		File: "southbridge/intel/common/acpi/platform.asl",
	})
	DSDTIncludes = append(DSDTIncludes, DSDTInclude{
		File:    "southbridge/intel/lynxpoint/acpi/globalnvs.asl",
		Comment: "global NVS and variables",
	})
	DSDTIncludes = append(DSDTIncludes, DSDTInclude{
		File: "southbridge/intel/common/acpi/sleepstates.asl",
	})
	DSDTPCI0Includes = append(DSDTPCI0Includes, DSDTInclude{
		File: "southbridge/intel/lynxpoint/acpi/pch.asl",
	})

	AddBootBlockFile("bootblock.c", "")
	bb := Create(ctx, "bootblock.c")
	defer bb.Close()
	Add_SPDX(bb, C, GPL2_only)
	bb.WriteString(`#include <southbridge/intel/lynxpoint/pch.h>

/* FIXME: remove this if not needed */
void mainboard_config_superio(void)
{
}
`)

	sb := Create(ctx, "romstage.c")
	defer sb.Close()
	Add_SPDX(sb, C, GPL2_only)
	sb.WriteString(`#include <stdint.h>
#include <northbridge/intel/haswell/haswell.h>
#include <southbridge/intel/lynxpoint/pch.h>

void mainboard_config_rcba(void)
{
}

/* FIXME: called after romstage_common, remove it if not used */
void mb_late_romstage_setup(void)
{
}

const struct usb2_port_config mainboard_usb2_ports[MAX_USB2_PORTS] = {
	/* FIXME: Length and Location are computed from IOBP values, may be inaccurate */
	/* Length, Enable, OCn#, Location */
`)

	pdo1 := PCIMap[PCIAddr{Bus: 0, Dev: 0x1d, Func: 0}].ConfigDump[0x64]
	ocmap1 := PCIMap[PCIAddr{Bus: 0, Dev: 0x1d, Func: 0}].ConfigDump[0x74:0x78]

	var pdo2 uint8
	var ocmap2 []uint8
	var nPorts uint
	if isULT {
		nPorts = 8
	} else {
		pdo2 = PCIMap[PCIAddr{Bus: 0, Dev: 0x1a, Func: 0}].ConfigDump[0x64]
		ocmap2 = PCIMap[PCIAddr{Bus: 0, Dev: 0x1a, Func: 0}].ConfigDump[0x74:0x78]
		nPorts = 14
	}

	xusb2pr := GetLE16(PCIMap[PCIAddr{Bus: 0, Dev: 0x14, Func: 0}].ConfigDump[0xd0:0xd4])

	for port := uint(0); port < nPorts; port++ {
		var port_oc int = -1
		var port_pos string
		var port_disable uint8

		if port < 8 {
			port_disable = ((pdo1 >> port) & (uint8(xusb2pr>>port) ^ 1)) & 1
			for oc := 0; oc < 4; oc++ {
				if (ocmap1[oc] & (1 << port)) != 0 {
					port_oc = oc
					break
				}
			}
		} else {
			port_disable = ((pdo2 >> (port - 8)) & (uint8(xusb2pr>>port) ^ 1)) & 1
			for oc := 0; oc < 4; oc++ {
				if (ocmap2[oc] & (1 << (port - 8))) != 0 {
					port_oc = oc + 4
					break
				}
			}
		}

		/* get USB2 port length and location from IOBP */
		port_iobp := inteltool.IOBP[0xe5004100+uint32(port)*0x100]
		loc_param := (port_iobp >> 8) & 7
		txamp := (port_iobp >> 11) & 7
		var port_length int

		if isULT {
			port_pos, port_length = GetLptLPEHCISetting(loc_param, txamp)
		} else if b.variant == LYNX_POINT_MOBILE {
			port_pos, port_length = GetLptMobileEHCISetting(loc_param, txamp)
		} else { /* desktop or server */
			port_pos, port_length = GetLptDesktopEHCISetting(loc_param, txamp)
		}

		if port_disable == 1 {
			port_pos = "USB_PORT_SKIP"
		}

		if port_oc == -1 {
			fmt.Fprintf(sb, "\t{ 0x%04x, %d, USB_OC_PIN_SKIP, %s },\n",
				port_length, (port_disable ^ 1), port_pos)
		} else {
			fmt.Fprintf(sb, "\t{ 0x%04x, %d, %d, %s },\n",
				port_length, (port_disable ^ 1), port_oc, port_pos)
		}
	}

	sb.WriteString(`};

const struct usb3_port_config mainboard_usb3_ports[MAX_USB3_PORTS] = {
`)

	xpdo := PCIMap[PCIAddr{Bus: 0, Dev: 0x14, Func: 0}].ConfigDump[0xe8]
	u3ocm := PCIMap[PCIAddr{Bus: 0, Dev: 0x14, Func: 0}].ConfigDump[0xc8:0xd0]

	if !isULT {
		nPorts = 6
	} else {
		nPorts = 4
	}

	for port := uint(0); port < nPorts; port++ {
		var port_oc int = -1
		port_disable := (xpdo >> port) & 1
		for oc := 0; oc < 8; oc++ {
			if (u3ocm[oc] & (1 << port)) != 0 {
				port_oc = oc
				break
			}
		}
		if port_oc == -1 {
			fmt.Fprintf(sb, "\t{ %d, USB_OC_PIN_SKIP },\n",
				(port_disable ^ 1))
		} else {
			fmt.Fprintf(sb, "\t{ %d, %d },\n",
				(port_disable ^ 1), port_oc)
		}
	}

	sb.WriteString(`};
`)

}

func init() {
	for _, id := range []uint16{
		0x8c41, 0x8c49, 0x8c4b, 0x8c4f,
	} {
		RegisterPCI(0x8086, uint16(id), lynxpoint{variant: LYNX_POINT_MOBILE})
	}

	for _, id := range []uint16{
		0x8c42, 0x8c44, 0x8c46, 0x8c4a,
		0x8c4c, 0x8c4e, 0x8c50, 0x8c5c,
	} {
		RegisterPCI(0x8086, uint16(id), lynxpoint{variant: LYNX_POINT_DESKTOP})
	}

	for _, id := range []uint16{
		0x8c52, 0x8c54, 0x8c56,
	} {
		RegisterPCI(0x8086, uint16(id), lynxpoint{variant: LYNX_POINT_SERVER})
	}

	for _, id := range []uint16{
		0x9c41, 0x9c43, 0x9c45,
	} {
		RegisterPCI(0x8086, uint16(id), lynxpoint{variant: LYNX_POINT_ULT})
	}

	/* PCIe bridge */
	for _, id := range []uint16{
		0x8c10, 0x8c12, 0x8c14, 0x8c16, 0x8c18, 0x8c1a, 0x8c1c, 0x8c1e,
		0x9c10, 0x9c12, 0x9c14, 0x9c16, 0x9c18, 0x9c1a,
	} {
		RegisterPCI(0x8086, id, GenericPCI{})
	}

	/* SMBus controller  */
	RegisterPCI(0x8086, 0x8c22, GenericPCI{MissingParent: "smbus"})
	RegisterPCI(0x8086, 0x9c22, GenericPCI{MissingParent: "smbus"})

	/* SATA */
	for _, id := range []uint16{
		0x8c00, 0x8c02, 0x8c04, 0x8c06, 0x8c08, 0x8c0e,
		0x8c01, 0x8c03, 0x8c05, 0x8c07, 0x8c09, 0x8c0f,
		0x9c03, 0x9c05, 0x9c07, 0x9c0f,
	} {
		RegisterPCI(0x8086, id, GenericPCI{})
	}

	/* EHCI */
	for _, id := range []uint16{
		0x9c26, 0x8c26, 0x8c2d,
	} {
		RegisterPCI(0x8086, id, GenericPCI{})
	}

	/* XHCI */
	RegisterPCI(0x8086, 0x8c31, GenericPCI{})
	RegisterPCI(0x8086, 0x9c31, GenericPCI{})

	/* ME and children */
	for _, id := range []uint16{
		0x8c3a, 0x8c3b, 0x8c3c, 0x8c3d,
		0x9c3a, 0x9c3b, 0x9c3c, 0x9c3d,
	} {
		RegisterPCI(0x8086, id, GenericPCI{})
	}

	/* Ethernet */
	RegisterPCI(0x8086, 0x8c33, GenericPCI{})

	/* Thermal */
	RegisterPCI(0x8086, 0x8c24, GenericPCI{})
	RegisterPCI(0x8086, 0x9c24, GenericPCI{})

	/* LAN Controller on LP PCH (if EEPROM has 0x0000/0xffff in DID) */
	RegisterPCI(0x8086, 0x155a, GenericPCI{})

	/* SDIO */
	RegisterPCI(0x8086, 0x9c35, GenericPCI{})

	/* Smart Sound Technology Controller */
	RegisterPCI(0x8086, 0x9c36, GenericPCI{})

	/* Serial I/O */
	for id := uint16(0x9c60); id <= 0x9c66; id++ {
		RegisterPCI(0x8086, id, GenericPCI{})
	}
}