| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <device/pci_ops.h> |
| #include <device/pci_def.h> |
| #include <device/smbus_host.h> |
| #include "i82801gx.h" |
| |
| uintptr_t smbus_base(void) |
| { |
| return SMBUS_IO_BASE; |
| } |
| |
| int smbus_enable_iobar(uintptr_t base) |
| { |
| /* Set the SMBus device statically. */ |
| const pci_devfn_t dev = PCI_DEV(0x0, 0x1f, 0x3); |
| |
| /* Check to make sure we've got the right device. */ |
| if (pci_read_config16(dev, PCI_DEVICE_ID) != 0x27da) |
| return -1; |
| |
| /* Set SMBus I/O base. */ |
| pci_write_config32(dev, SMB_BASE, base | PCI_BASE_ADDRESS_SPACE_IO); |
| |
| /* Set SMBus enable. */ |
| pci_write_config8(dev, HOSTC, HST_EN); |
| |
| /* Set SMBus I/O space enable. */ |
| pci_write_config16(dev, PCI_COMMAND, PCI_COMMAND_IO); |
| |
| return 0; |
| } |