| /* |
| * 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 bus) |
| { |
| if (bus >= 0 && bus <= 3) |
| return PCI_DEVFN(LPSS_DEV_SLOT_I2C_D0, bus); |
| else if (bus >= 4 && bus <= 7) |
| return PCI_DEVFN(LPSS_DEV_SLOT_I2C_D1, (bus - 4)); |
| else |
| return -1; |
| } |
| |
| /* Convert PCI device and function to I2C bus number */ |
| static inline int i2c_devfn_to_bus(unsigned devfn) |
| { |
| if (PCI_SLOT(devfn) == LPSS_DEV_SLOT_I2C_D0) |
| return PCI_FUNC(devfn); |
| else if (PCI_SLOT(devfn) == LPSS_DEV_SLOT_I2C_D1) |
| return PCI_FUNC(devfn) + 4; |
| else |
| return -1; |
| } |
| |
| #endif /* _SOC_APOLLOLAKE_I2C_H_ */ |