/*
 * This file is part of the coreboot project.
 *
 * Copyright (C) 2004 Tyan Computer
 * Written by Yinghai Lu <yhlu@tyan.com> for Tyan Computer.
 *
 * 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.
 */

#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <device/pci_ops.h>
#include <device/smbus.h>
#include <arch/io.h>
#include "chip.h"
#include "smbus.h"

static int lsmbus_recv_byte(struct device *dev)
{
	unsigned device;
	struct resource *res;
	struct bus *pbus;

	device = dev->path.i2c.device;
	pbus = get_pbus_smbus(dev);

	res = find_resource(pbus->dev, 0x20 + (pbus->link_num * 4));

	return do_smbus_recv_byte(res->base, device);
}

static int lsmbus_send_byte(struct device *dev, u8 val)
{
	unsigned device;
	struct resource *res;
	struct bus *pbus;

	device = dev->path.i2c.device;
	pbus = get_pbus_smbus(dev);

	res = find_resource(pbus->dev, 0x20 + (pbus->link_num * 4));

	return do_smbus_send_byte(res->base, device, val);
}

static int lsmbus_read_byte(struct device *dev, u8 address)
{
	unsigned device;
	struct resource *res;
	struct bus *pbus;

	device = dev->path.i2c.device;
	pbus = get_pbus_smbus(dev);

	res = find_resource(pbus->dev, 0x20 + (pbus->link_num * 4));

	return do_smbus_read_byte(res->base, device, address);
}

static int lsmbus_write_byte(struct device *dev, u8 address, u8 val)
{
	unsigned device;
	struct resource *res;
	struct bus *pbus;

	device = dev->path.i2c.device;
	pbus = get_pbus_smbus(dev);

	res = find_resource(pbus->dev, 0x20 + (pbus->link_num * 4));

	return do_smbus_write_byte(res->base, device, address, val);
}

static struct smbus_bus_operations lops_smbus_bus = {
	.recv_byte  = lsmbus_recv_byte,
	.send_byte  = lsmbus_send_byte,
	.read_byte  = lsmbus_read_byte,
	.write_byte = lsmbus_write_byte,
};

static struct device_operations smbus_ops = {
	.read_resources   = pci_dev_read_resources,
	.set_resources    = pci_dev_set_resources,
	.enable_resources = pci_dev_enable_resources,
	.init             = 0,
	.scan_bus         = scan_smbus,
	.ops_pci          = &ck804_pci_ops,
	.ops_smbus_bus    = &lops_smbus_bus,
};

static const struct pci_driver smbus_driver __pci_driver = {
	.ops    = &smbus_ops,
	.vendor = PCI_VENDOR_ID_NVIDIA,
	.device = PCI_DEVICE_ID_NVIDIA_CK804_SM,
};