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/*
* This file is part of the coreboot project.
*
* Copyright 2016 Google Inc.
*
* 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; either version 2 of the License, or
* (at your option) any later version.
*
* 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.
*/
#ifndef _SOC_APOLLOLAKE_I2C_H_
#define _SOC_APOLLOLAKE_I2C_H_
#include <device/pci_def.h>
#include <soc/pci_devs.h>
/* I2C Controller Reset in MMIO private region */
#define I2C_LPSS_REG_RESET 0x204
#define I2C_LPSS_RESET_RELEASE_HC ((1 << 1) | (1 << 0))
#define I2C_LPSS_RESET_RELEASE_IDMA (1 << 2)
/* Convert I2C bus number to PCI device and function */
static inline int i2c_bus_to_devfn(unsigned int bus)
{
if (bus >= 0 && 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 */
static inline int i2c_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;
}
#endif /* _SOC_APOLLOLAKE_I2C_H_ */
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