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/*
* This file is part of the coreboot project.
*
* Copyright 2016 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.
*/
#include <arch/io.h>
#include <console/console.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <rules.h>
#include <soc/iomap.h>
#include <soc/pci_devs.h>
#include <intelblocks/p2sb.h>
#define P2SB_E0 0xe0
#define HIDE_BIT (1 << 0)
static void p2sb_set_hide_bit(int hide)
{
struct device *dev;
const uint16_t reg = P2SB_E0 + 1;
const uint8_t mask = HIDE_BIT;
uint8_t val;
dev = PCH_DEV_P2SB;
val = pci_read_config8(dev, reg);
val &= ~mask;
if (hide)
val |= mask;
pci_write_config8(dev, reg, val);
}
void p2sb_unhide(void)
{
p2sb_set_hide_bit(0);
}
void p2sb_hide(void)
{
p2sb_set_hide_bit(1);
}
static void read_resources(struct device *dev)
{
/*
* There's only one resource on the P2SB device. It's also already
* manually set to a fixed address in earlier boot stages.
*/
mmio_resource(dev, PCI_BASE_ADDRESS_0, P2SB_BAR / KiB, P2SB_SIZE / KiB);
}
static const struct device_operations device_ops = {
.read_resources = read_resources,
.set_resources = DEVICE_NOOP,
};
static const unsigned short pci_device_ids[] = {
PCI_DEVICE_ID_INTEL_APL_P2SB,
PCI_DEVICE_ID_INTEL_GLK_P2SB,
PCI_DEVICE_ID_INTEL_CNL_P2SB,
0,
};
static const struct pci_driver pmc __pci_driver = {
.ops = &device_ops,
.vendor = PCI_VENDOR_ID_INTEL,
.devices = pci_device_ids,
};
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