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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2008-2009 coresystems GmbH
* Copyright (C) 2014 Google Inc.
* Copyright (C) 2016 Siemens AG
*
* 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 <arch/io.h>
#include <device/device.h>
#include <device/smbus.h>
#include <device/smbus_def.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <device/pci_ops.h>
#include <soc/pci_devs.h>
#include <soc/smbus.h>
static void pch_smbus_init(struct device *dev)
{
struct resource *res;
/* Set Receive Slave Address */
res = find_resource(dev, PCI_BASE_ADDRESS_4);
if (res)
outb(SMBUS_SLAVE_ADDR, res->base + SMB_RCV_SLVA);
}
static void pch_smbus_enable(struct device *dev)
{
uint8_t reg8;
reg8 = pci_read_config8(dev, HOSTC);
reg8 |= HST_EN;
pci_write_config8(dev, HOSTC, reg8);
}
static int lsmbus_read_byte(struct device *dev, uint8_t address)
{
uint16_t device;
struct resource *res;
struct bus *pbus;
device = dev->path.i2c.device;
pbus = get_pbus_smbus(dev);
res = find_resource(pbus->dev, PCI_BASE_ADDRESS_4);
return do_smbus_read_byte(res->base, device, address);
}
static int lsmbus_write_byte(struct device *dev, uint8_t address, uint8_t data)
{
uint16_t device;
struct resource *res;
struct bus *pbus;
device = dev->path.i2c.device;
pbus = get_pbus_smbus(dev);
res = find_resource(pbus->dev, PCI_BASE_ADDRESS_4);
return do_smbus_write_byte(res->base, device, address, data);
}
static struct smbus_bus_operations lops_smbus_bus = {
.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,
.scan_bus = &scan_smbus,
.init = &pch_smbus_init,
.enable = &pch_smbus_enable,
.ops_smbus_bus = &lops_smbus_bus,
};
static const unsigned short pci_device_ids[] = {
SMBUS_DEVID,
0
};
static const struct pci_driver pch_smbus __pci_driver = {
.ops = &smbus_ops,
.vendor = PCI_VENDOR_ID_INTEL,
.devices = pci_device_ids,
};
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