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/* SPDX-License-Identifier: GPL-2.0-only */
/* This file is part of the coreboot project. */
#include <device/pci_ops.h>
#include <device/pci_def.h>
#include <device/pci_ids.h>
#include <device/smbus_host.h>
#include "i82801ix.h"
uintptr_t smbus_base(void)
{
return SMBUS_IO_BASE;
}
int smbus_enable_iobar(uintptr_t base)
{
/* Set the SMBus device statically. */
pci_devfn_t dev = PCI_DEV(0x0, 0x1f, 0x3);
/* Check to make sure we've got the right device. */
if (pci_read_config16(dev, 0x2) != PCI_DEVICE_ID_INTEL_82801IB_SMB)
return -1;
/* Set SMBus I/O base. */
pci_write_config32(dev, SMB_BASE,
base | PCI_BASE_ADDRESS_SPACE_IO);
/* Set SMBus enable. */
pci_write_config8(dev, HOSTC, HST_EN);
/* Set SMBus I/O space enable. */
pci_write_config16(dev, PCI_COMMAND, PCI_COMMAND_IO);
return 0;
}
int smbus_read_byte(unsigned int device, unsigned int address)
{
return do_smbus_read_byte(SMBUS_IO_BASE, device, address);
}
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