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/*
* This file is part of the coreboot project.
*
* Copyright 2016 Google Inc.
* Copyright (C) 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 <device/device.h>
#include <device/pci_def.h>
#include <drivers/i2c/designware/dw_i2c.h>
#include <soc/pci_devs.h>
/* Convert I2C bus number to PCI device and function */
int dw_i2c_soc_bus_to_devfn(unsigned int bus)
{
if (bus <= 3)
return PCI_DEVFN(PCH_DEV_SLOT_SIO1, bus);
else if (bus >= 4 && bus <= 7)
return PCI_DEVFN(PCH_DEV_SLOT_SIO2, (bus - 4));
else
return -1;
}
/* Convert PCI device and function to I2C bus number */
int dw_i2c_soc_devfn_to_bus(unsigned int devfn)
{
if (PCI_SLOT(devfn) == PCH_DEV_SLOT_SIO1)
return PCI_FUNC(devfn);
else if (PCI_SLOT(devfn) == PCH_DEV_SLOT_SIO2)
return PCI_FUNC(devfn) + 4;
else
return -1;
}
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