src/southbridge/intel/i82801ix/thermal.c

/*
 * This file is part of the coreboot project.
 *
 * Copyright (C) 2012 secunet Security Networks AG
 * (Written by Nico Huber <nico.huber@secunet.com> for secunet)
 *
 * 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/pci_ops.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>

#include "i82801ix.h"

static void thermal_init(struct device *dev)
{
	if (LPC_IS_MOBILE(pcidev_on_root(0x1f, 0)))
		return;

	u8 reg8;
	u32 reg32;

	pci_write_config32(dev, 0x10, (uintptr_t)DEFAULT_TBAR);
	reg32 = pci_read_config32(dev, 0x04);
	pci_write_config32(dev, 0x04, reg32 | (1 << 1));

	write32(DEFAULT_TBAR + 0x04, 0); /* Clear thermal trip points. */
	write32(DEFAULT_TBAR + 0x44, 0);

	write8(DEFAULT_TBAR + 0x01, 0xba); /* Enable sensor 0 + 1. */
	write8(DEFAULT_TBAR + 0x41, 0xba);

	reg8 = read8(DEFAULT_TBAR + 0x08); /* Lock thermal registers. */
	write8(DEFAULT_TBAR + 0x08, reg8 | (1 << 7));
	reg8 = read8(DEFAULT_TBAR + 0x48);
	write8(DEFAULT_TBAR + 0x48, reg8 | (1 << 7));

	reg32 = pci_read_config32(dev, 0x04);
	pci_write_config32(dev, 0x04, reg32 & ~(1 << 1));
	pci_write_config32(dev, 0x10, 0);
}

static void thermal_set_subsystem(struct device *dev, unsigned vendor,
				  unsigned device)
{
	if (!vendor || !device) {
		pci_write_config32(dev, PCI_SUBSYSTEM_VENDOR_ID,
				pci_read_config32(dev, PCI_VENDOR_ID));
	} else {
		pci_write_config32(dev, PCI_SUBSYSTEM_VENDOR_ID,
				((device & 0xffff) << 16) | (vendor & 0xffff));
	}
}

static struct pci_operations thermal_pci_ops = {
	.set_subsystem = thermal_set_subsystem,
};

static struct device_operations device_ops = {
	.read_resources		= pci_dev_read_resources,
	.set_resources		= pci_dev_set_resources,
	.enable_resources	= pci_dev_enable_resources,
	.init			= thermal_init,
	.scan_bus		= 0,
	.ops_pci		= &thermal_pci_ops,
};

static const struct pci_driver ich9_thermal __pci_driver = {
	.ops	= &device_ops,
	.vendor	= PCI_VENDOR_ID_INTEL,
	.device	= 0x2932,
};