| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2017 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 <arch/io.h> |
| #include <device/device.h> |
| #include <device/path.h> |
| #include <device/smbus.h> |
| #include <device/pci.h> |
| #include <device/pci_ids.h> |
| #include <soc/smbus.h> |
| #include "smbuslib.h" |
| |
| static int lsmbus_read_byte(struct device *dev, u8 address) |
| { |
| u16 device; |
| struct resource *res; |
| struct bus *pbus; |
| device = dev->path.i2c.device; |
| pbus = get_pbus_smbus(dev); |
| res = find_resource(pbus->dev, PCI_BASE_ADDRESS_4); |
| return do_smbus_read_byte(res->base, device, address); |
| } |
| |
| static int lsmbus_write_byte(struct device *dev, u8 address, u8 data) |
| { |
| u16 device; |
| struct resource *res; |
| struct bus *pbus; |
| |
| device = dev->path.i2c.device; |
| pbus = get_pbus_smbus(dev); |
| res = find_resource(pbus->dev, PCI_BASE_ADDRESS_4); |
| return do_smbus_write_byte(res->base, device, address, data); |
| } |
| |
| static struct smbus_bus_operations lops_smbus_bus = { |
| .read_byte = lsmbus_read_byte, |
| .write_byte = lsmbus_write_byte, |
| }; |
| |
| static void pch_smbus_init(struct device *dev) |
| { |
| struct resource *res; |
| |
| /* Enable clock gating */ |
| pci_update_config32(dev, 0x80, |
| ~((1 << 8) | (1 << 10) | (1 << 12) | (1 << 14)), 0); |
| |
| /* Set Receive Slave Address */ |
| res = find_resource(dev, PCI_BASE_ADDRESS_4); |
| if (res) |
| outb(SMBUS_SLAVE_ADDR, res->base + SMB_RCV_SLVA); |
| } |
| |
| static void smbus_read_resources(struct device *dev) |
| { |
| struct resource *res = new_resource(dev, PCI_BASE_ADDRESS_4); |
| res->base = SMBUS_IO_BASE; |
| res->size = 32; |
| res->limit = res->base + res->size - 1; |
| res->flags = IORESOURCE_IO | IORESOURCE_FIXED | IORESOURCE_RESERVE | |
| IORESOURCE_STORED | IORESOURCE_ASSIGNED; |
| |
| /* Also add MMIO resource */ |
| res = pci_get_resource(dev, PCI_BASE_ADDRESS_0); |
| } |
| |
| static struct device_operations smbus_ops = { |
| .read_resources = smbus_read_resources, |
| .set_resources = pci_dev_set_resources, |
| .enable_resources = pci_dev_enable_resources, |
| .scan_bus = scan_smbus, |
| .init = pch_smbus_init, |
| .ops_pci = &pci_dev_ops_pci, |
| .ops_smbus_bus = &lops_smbus_bus, |
| }; |
| |
| static const unsigned short pci_device_ids[] = { |
| PCI_DEVICE_ID_INTEL_CNL_SMBUS, |
| PCI_DEVICE_ID_INTEL_SPT_LP_SMBUS, |
| PCI_DEVICE_ID_INTEL_SPT_H_SMBUS, |
| PCI_DEVICE_ID_INTEL_LWB_SMBUS_SUPER, |
| PCI_DEVICE_ID_INTEL_LWB_SMBUS, |
| PCI_DEVICE_ID_INTEL_ICP_LP_SMBUS, |
| PCI_DEVICE_ID_INTEL_CMP_SMBUS, |
| PCI_DEVICE_ID_INTEL_CMP_H_SMBUS, |
| PCI_DEVICE_ID_INTEL_TGP_LP_SMBUS, |
| PCI_DEVICE_ID_INTEL_JSP_PRE_PROD_SMBUS, |
| 0 |
| }; |
| |
| static const struct pci_driver pch_smbus __pci_driver = { |
| .ops = &smbus_ops, |
| .vendor = PCI_VENDOR_ID_INTEL, |
| .devices = pci_device_ids, |
| }; |