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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2017-2018 Intel Corporation.
*
* 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/acpi.h>
#include <arch/io.h>
#include <console/console.h>
#include <cpu/x86/smm.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <intelblocks/pmc.h>
#include <soc/pci_devs.h>
/* SoC overrides */
/* Fill up PMC resource structure inside SoC directory */
__weak int pmc_soc_get_resources(
struct pmc_resource_config *cfg)
{
/* no-op */
return -1;
}
/* SoC override PMC initialization */
__weak void pmc_soc_init(struct device *dev)
{
/* no-op */
}
static void pch_pmc_add_new_resource(struct device *dev,
uint8_t offset, uintptr_t base, size_t size,
unsigned long flags)
{
struct resource *res;
res = new_resource(dev, offset);
res->base = base;
res->size = size;
res->flags = flags;
}
static void pch_pmc_add_mmio_resources(struct device *dev,
const struct pmc_resource_config *cfg)
{
pch_pmc_add_new_resource(dev, cfg->pwrmbase_offset,
cfg->pwrmbase_addr, cfg->pwrmbase_size,
IORESOURCE_MEM | IORESOURCE_ASSIGNED |
IORESOURCE_FIXED | IORESOURCE_RESERVE);
}
static void pch_pmc_add_io_resources(struct device *dev,
const struct pmc_resource_config *cfg)
{
pch_pmc_add_new_resource(dev, cfg->abase_offset,
cfg->abase_addr, cfg->abase_size,
IORESOURCE_IO | IORESOURCE_ASSIGNED |
IORESOURCE_FIXED);
if (IS_ENABLED(CONFIG_PMC_INVALID_READ_AFTER_WRITE)) {
/*
* The ACPI IO BAR (offset 0x20) is not PCI compliant. We've
* observed cases where the BAR reads back as 0, but the IO
* window is open. This also means that it will not respond
* to PCI probing.
*/
pci_write_config16(dev, cfg->abase_offset, cfg->abase_addr);
/*
* In pci_dev_enable_resources, reading IO SPACE ACCESS bit in
* STATUSCOMMAND register does not read back the written
* value correctly, hence IO access gets disabled. This is
* seen in some PMC devices, hence this code makes sure
* IO access is available.
*/
dev->command |= PCI_COMMAND_IO;
}
}
static void pch_pmc_read_resources(struct device *dev)
{
struct pmc_resource_config pmc_cfg;
struct pmc_resource_config *config = &pmc_cfg;
if (pmc_soc_get_resources(config) < 0)
die("Unable to get PMC controller resource information!");
/* Get the normal PCI resources of this device. */
pci_dev_read_resources(dev);
/* Add non-standard MMIO resources. */
pch_pmc_add_mmio_resources(dev, config);
/* Add IO resources. */
pch_pmc_add_io_resources(dev, config);
}
void pmc_set_acpi_mode(void)
{
if (IS_ENABLED(CONFIG_HAVE_SMI_HANDLER) && !acpi_is_wakeup_s3()) {
printk(BIOS_DEBUG, "Disabling ACPI via APMC:\n");
outb(APM_CNT_ACPI_DISABLE, APM_CNT);
printk(BIOS_DEBUG, "done.\n");
}
}
static struct device_operations device_ops = {
.read_resources = &pch_pmc_read_resources,
.set_resources = &pci_dev_set_resources,
.enable_resources = &pci_dev_enable_resources,
.init = &pmc_soc_init,
.ops_pci = &pci_dev_ops_pci,
.scan_bus = &scan_lpc_bus,
};
static const unsigned short pci_device_ids[] = {
PCI_DEVICE_ID_INTEL_SPT_LP_PMC,
PCI_DEVICE_ID_INTEL_SPT_H_PMC,
PCI_DEVICE_ID_INTEL_KBP_H_PMC,
PCI_DEVICE_ID_INTEL_APL_PMC,
PCI_DEVICE_ID_INTEL_GLK_PMC,
PCI_DEVICE_ID_INTEL_CNP_H_PMC,
PCI_DEVICE_ID_INTEL_ICP_PMC,
0
};
static const struct pci_driver pch_pmc __pci_driver = {
.ops = &device_ops,
.vendor = PCI_VENDOR_ID_INTEL,
.devices = pci_device_ids,
};
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