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/* SPDX-License-Identifier: GPL-2.0-only */
/* This file is part of the coreboot project. */
#include <console/console.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_def.h>
#include <device/pci_ops.h>
#include <device/pci_ids.h>
#include "pch.h"
static void pci_init(struct device *dev)
{
u16 reg16;
u8 reg8;
printk(BIOS_DEBUG, "PCI init.\n");
/* Enable Bus Master */
reg16 = pci_read_config16(dev, PCI_COMMAND);
reg16 |= PCI_COMMAND_MASTER;
pci_write_config16(dev, PCI_COMMAND, reg16);
/* This device has no interrupt */
pci_write_config8(dev, INTR, 0xff);
/* disable parity error response and SERR */
reg16 = pci_read_config16(dev, PCI_BRIDGE_CONTROL);
reg16 &= ~PCI_BRIDGE_CTL_PARITY;
reg16 &= ~PCI_BRIDGE_CTL_SERR;
pci_write_config16(dev, PCI_BRIDGE_CONTROL, reg16);
/* Master Latency Count must be set to 0x04! */
reg8 = pci_read_config8(dev, SMLT);
reg8 &= 0x07;
reg8 |= (0x04 << 3);
pci_write_config8(dev, SMLT, reg8);
/* Clear errors in status registers */
reg16 = pci_read_config16(dev, PSTS);
//reg16 |= 0xf900;
pci_write_config16(dev, PSTS, reg16);
reg16 = pci_read_config16(dev, SECSTS);
// reg16 |= 0xf900;
pci_write_config16(dev, SECSTS, reg16);
}
static struct pci_operations pci_ops = {
.set_subsystem = pci_dev_set_subsystem,
};
static struct device_operations device_ops = {
.read_resources = pci_bus_read_resources,
.set_resources = pci_dev_set_resources,
.enable_resources = pci_bus_enable_resources,
.init = pci_init,
.scan_bus = pci_scan_bridge,
.ops_pci = &pci_ops,
};
static const struct pci_driver pch_pci __pci_driver = {
.ops = &device_ops,
.vendor = PCI_VENDOR_ID_INTEL,
.device = 0x2448,
};
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