| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* This file is part of the coreboot project. */ |
| |
| #include <device/device.h> |
| #include <device/path.h> |
| #include <device/smbus.h> |
| #include <device/pci.h> |
| #include <device/pci_ids.h> |
| #include <device/smbus_host.h> |
| #include "i82801gx.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, 0x20); |
| |
| 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, 0x20); |
| return do_smbus_write_byte(res->base, device, address, data); |
| } |
| |
| static int lsmbus_block_write(struct device *dev, u8 cmd, u8 bytes, |
| const u8 *buf) |
| { |
| u16 device; |
| struct resource *res; |
| struct bus *pbus; |
| |
| device = dev->path.i2c.device; |
| pbus = get_pbus_smbus(dev); |
| res = find_resource(pbus->dev, 0x20); |
| return do_smbus_block_write(res->base, device, cmd, bytes, buf); |
| } |
| |
| static int lsmbus_block_read(struct device *dev, u8 cmd, u8 bytes, u8 *buf) |
| { |
| u16 device; |
| struct resource *res; |
| struct bus *pbus; |
| |
| device = dev->path.i2c.device; |
| pbus = get_pbus_smbus(dev); |
| res = find_resource(pbus->dev, 0x20); |
| return do_smbus_block_read(res->base, device, cmd, bytes, buf); |
| } |
| |
| |
| static struct smbus_bus_operations lops_smbus_bus = { |
| .read_byte = lsmbus_read_byte, |
| .write_byte = lsmbus_write_byte, |
| .block_read = lsmbus_block_read, |
| .block_write = lsmbus_block_write, |
| }; |
| |
| static struct pci_operations smbus_pci_ops = { |
| .set_subsystem = pci_dev_set_subsystem, |
| }; |
| |
| 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; |
| } |
| |
| 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, |
| .enable = i82801gx_enable, |
| .ops_smbus_bus = &lops_smbus_bus, |
| .ops_pci = &smbus_pci_ops, |
| }; |
| |
| /* 82801GB/GR/GDH/GBM/GHM/GU (ICH7/ICH7R/ICH7DH/ICH7-M/ICH7-M DH/ICH7-U) */ |
| static const struct pci_driver i82801gx_smbus __pci_driver = { |
| .ops = &smbus_ops, |
| .vendor = PCI_VENDOR_ID_INTEL, |
| .device = 0x27da, |
| }; |