/*
 * This file is part of the coreboot project.
 *
 * Copyright (C) 2011 Kyösti Mälkki <kyosti.malkki@gmail.com>
 *
 * 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 <arch/pirq_routing.h>
#include <device/pci_def.h>
#include <device/pci_ids.h>
#include "bus.h"

#define UNUSED_INTERRUPT {0, 0}
#define PIRQ_A 0x60
#define PIRQ_B 0x61
#define PIRQ_C 0x62
#define PIRQ_D 0x63
#define PIRQ_E 0x68
#define PIRQ_F 0x69
#define PIRQ_G 0x6A
#define PIRQ_H 0x6B

static const struct irq_routing_table intel_irq_routing_table = {
	PIRQ_SIGNATURE,
	PIRQ_VERSION,
	32 + 16 * CONFIG_IRQ_SLOT_COUNT,		// Size of this struct in bytes
	0,			 			// PCI bus number on which the interrupt router resides
	PCI_DEVFN(31, 0),   				// PCI device/function number of the interrupt router
	0,		 				// PCI-exclusive IRQ bitmap
	PCI_VENDOR_ID_INTEL,				// Vendor ID of compatible PCI interrupt router
	PCI_DEVICE_ID_INTEL_82801DB_LPC,		// Device ID of compatible PCI interrupt router
	0,		 				// Additional miniport information
	{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 		// Reserved, must be zero
	0xB1,      					// Checksum of the entire structure (causes 8-bit sum == 0)
	{
		// NOTE: For 82801, a nonzero link value is a pointer to a PIRQ[n]_ROUT register in PCI configuration space
		//		 This was determined from linux-2.6.11/arch/i386/pci/irq.c
		// bitmap of 0xdcf8 == routable to IRQ3-IRQ7, IRQ10-IRQ12, or IRQ14-IRQ15
		// ICH-3 doesn't allow SERIRQ or PCI message to generate IRQ0, IRQ2, IRQ8, or IRQ13
		// Not sure why IRQ9 isn't routable (inherited from Tyan S2735)

		//				   	  INTA#              INTB#	      INTC#             INTD#
		//  bus,		device #  	  {link  , bitmap}, {link  , bitmap}, {link  , bitmap}, {link  , bitmap},  slot, rfu

		{PCI_BUS_ROOT,		PCI_DEVFN(31, 0), {{PIRQ_C, 0xdcf8}, {PIRQ_B, 0xdcf8}, UNUSED_INTERRUPT, UNUSED_INTERRUPT},   0, 0},	// IDE / SMBus
		{PCI_BUS_ROOT,		PCI_DEVFN(29, 0), {{PIRQ_A, 0xdcf8}, {PIRQ_D, 0xdcf8}, {PIRQ_C, 0xdcf8}, {PIRQ_H, 0xdcf8}},   0, 0},	// USB 1.1

		{PCI_BUS_P64H2_B,	PCI_DEVFN(2, 0) , {{PIRQ_C, 0xdcf8}, {PIRQ_C, 0xdcf8}, {PIRQ_C, 0xdcf8}, {PIRQ_C, 0xdcf8}},   0, 0},
		{PCI_BUS_P64H2_B,	PCI_DEVFN(3, 0) , {{PIRQ_C, 0xdcf8}, {PIRQ_C, 0xdcf8}, {PIRQ_C, 0xdcf8}, {PIRQ_C, 0xdcf8}},   0, 0},
		{PCI_BUS_P64H2_B,	PCI_DEVFN(4, 0) , {{PIRQ_C, 0xdcf8}, {PIRQ_C, 0xdcf8}, {PIRQ_C, 0xdcf8}, {PIRQ_C, 0xdcf8}},   0, 0},    // GbE

		{PCI_BUS_P64H2_A,	PCI_DEVFN(2, 0) , {{PIRQ_C, 0xdcf8}, {PIRQ_C, 0xdcf8}, {PIRQ_C, 0xdcf8}, {PIRQ_C, 0xdcf8}},   0, 0},
		{PCI_BUS_P64H2_A,	PCI_DEVFN(3, 0) , {{PIRQ_C, 0xdcf8}, {PIRQ_C, 0xdcf8}, {PIRQ_C, 0xdcf8}, {PIRQ_C, 0xdcf8}},   0, 0},
		{PCI_BUS_P64H2_A,	PCI_DEVFN(4, 0) , {{PIRQ_C, 0xdcf8}, {PIRQ_C, 0xdcf8}, {PIRQ_C, 0xdcf8}, {PIRQ_C, 0xdcf8}},   0, 0},    // SCSI

		{PCI_BUS_ICH4,		PCI_DEVFN(3, 0),  {{PIRQ_E, 0xdcf8}, {PIRQ_F, 0xdcf8}, {PIRQ_G, 0xdcf8}, {PIRQ_H, 0xdcf8}},  0, 0},	// 32-bit slot

	}
};

unsigned long write_pirq_routing_table(unsigned long addr)
{
	return copy_pirq_routing_table(addr, &intel_irq_routing_table);
}