/*
 * This file is part of the coreboot project.
 *
 * Copyright (C) 2008-2009 coresystems GmbH
 * Copyright (C) 2013 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 <stdint.h>
#include <arch/io.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <romstage_handoff.h>

#include <baytrail/iomap.h>
#include <baytrail/lpc.h>
#include <baytrail/nvs.h>
#include <baytrail/pci_devs.h>
#include <baytrail/ramstage.h>

static inline void
add_mmio_resource(device_t dev, int i, unsigned long addr, unsigned long size)
{
	mmio_resource(dev, i, addr >> 10, size >> 10);
}

static void sc_add_mmio_resources(device_t dev)
{
	add_mmio_resource(dev, PBASE, PMC_BASE_ADDRESS, 1024);
	add_mmio_resource(dev, IOBASE, IO_BASE_ADDRESS, 16 * 1024);
	add_mmio_resource(dev, IBASE, ILB_BASE_ADDRESS, 1024);
	add_mmio_resource(dev, SBASE, SPI_BASE_ADDRESS, 1024);
	add_mmio_resource(dev, MPBASE, MPHY_BASE_ADDRESS, 1024 * 1024);
	add_mmio_resource(dev, PUBASE, PUNIT_BASE_ADDRESS, 2048);
	add_mmio_resource(dev, RCBA, RCBA_BASE_ADDRESS, 1024);
}

/* Default IO range claimed by the LPC device. The upper bound is exclusive. */
#define LPC_DEFAULT_IO_RANGE_LOWER 0
#define LPC_DEFAULT_IO_RANGE_UPPER 0x1000

static inline int io_range_in_default(int base, int size)
{
	/* Does it start above the range? */
	if (base >= LPC_DEFAULT_IO_RANGE_UPPER)
		return 0;

	/* Is it entirely contained? */
	if (base >= LPC_DEFAULT_IO_RANGE_LOWER &&
	    (base + size) < LPC_DEFAULT_IO_RANGE_UPPER)
		return 1;

	/* This will return not in range for partial overlaps. */
	return 0;
}

/*
 * Note: this function assumes there is no overlap with the default LPC device's
 * claimed range: LPC_DEFAULT_IO_RANGE_LOWER -> LPC_DEFAULT_IO_RANGE_UPPER.
 */
static void sc_add_io_resource(device_t dev, int base, int size, int index)
{
	struct resource *res;

	if (io_range_in_default(base, size))
		return;

	res = new_resource(dev, index);
	res->base = base;
	res->size = size;
	res->flags = IORESOURCE_IO | IORESOURCE_ASSIGNED | IORESOURCE_FIXED;
}

static void sc_add_io_resources(device_t dev)
{
	struct resource *res;

	/* Add the default claimed IO range for the LPC device. */
	res = new_resource(dev, 0);
	res->base = LPC_DEFAULT_IO_RANGE_LOWER;
	res->size = LPC_DEFAULT_IO_RANGE_UPPER - LPC_DEFAULT_IO_RANGE_LOWER;
	res->flags = IORESOURCE_IO | IORESOURCE_ASSIGNED | IORESOURCE_FIXED;

	/* GPIO */
	sc_add_io_resource(dev, GPIO_BASE_ADDRESS, 256, GBASE);

	/* ACPI */
	sc_add_io_resource(dev, ACPI_BASE_ADDRESS, 128, ABASE);
}

static void sc_read_resources(device_t dev)
{
	/* Get the normal PCI resources of this device. */
	pci_dev_read_resources(dev);

	/* Add non-standard MMIO resources. */
	sc_add_mmio_resources(dev);

	/* Add IO resources. */
	sc_add_io_resources(dev);
}

static struct device_operations device_ops = {
	.read_resources		= sc_read_resources,
	.set_resources		= pci_dev_set_resources,
	.enable_resources	= NULL,
	.init			= NULL,
	.enable			= NULL,
	.scan_bus		= NULL,
	.ops_pci		= &soc_pci_ops,
};

static const struct pci_driver southcluster __pci_driver = {
	.ops		= &device_ops,
	.vendor		= PCI_VENDOR_ID_INTEL,
	.device		= LPC_DEVID,
};