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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2016 - 2017 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 <stdint.h>
#include <stdlib.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <console/console.h>
#include <soc/pci_devs.h>
#include <soc/ramstage.h>
/**
* Read the base address registers for a given device.
*
* @param dev Pointer to the dev structure.
* @param howmany How many registers to read.
*/
static void pci_read_bases(struct device *dev, unsigned int howmany)
{
unsigned long index;
for (index = PCI_BASE_ADDRESS_0;
(index < PCI_BASE_ADDRESS_0 + (howmany << 2));) {
struct resource *resource;
resource = pci_get_resource(dev, index);
/**
* Workaround for Denverton-NS silicon (Rev A0/A1 for CSME/IE,
* Rev B0 for CSME only)
* CSME&IEs KT IO bar must be 16-byte aligned
*/
if ((resource->flags & IORESOURCE_IO) &&
(resource->align != 4)) {
printk(BIOS_DEBUG,
"CSME&IEs KT IO bar must be 16-byte aligned!\n");
resource->align = 4;
resource->gran = 4;
resource->size = 16;
}
index += (resource->flags & IORESOURCE_PCI64) ? 8 : 4;
}
compact_resources(dev);
}
static void pci_csme_ie_kt_read_resources(struct device *dev)
{
/**
* CSME/IE KT has 2 BARs to check:
* 0x10 - KT IO BAR
* 0x14 - KT Memory BAR
* CSME/IE KT has no Expansion ROM BAR to check:
* 0x30 - KT Host XRBAR, READ ONLY
*/
pci_read_bases(dev, 2);
}
static struct device_operations csme_ie_kt_ops = {
.read_resources = pci_csme_ie_kt_read_resources,
.set_resources = pci_dev_set_resources,
.enable_resources = pci_dev_enable_resources,
.scan_bus = 0,
.init = 0,
.ops_pci = &soc_pci_ops,
};
static const unsigned short pci_device_ids[] = {
ME_MEKT_DEVID, /* DVN CSME KT */
IE_MEKT_DEVID, /* DVN IE KT */
0
};
static const struct pci_driver csme_ie_kt __pci_driver = {
.ops = &csme_ie_kt_ops,
.vendor = PCI_VENDOR_ID_INTEL,
.devices = pci_device_ids,
};
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