| /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| |
| #include <stdint.h> |
| #include <device/pci_ops.h> |
| #include <device/pci.h> |
| #include <device/pci_ids.h> |
| #include <device/smbus_host.h> |
| #include "i82371eb.h" |
| |
| void i82371eb_early_init(void) |
| { |
| enable_smbus(); |
| enable_pm(); |
| } |
| |
| uintptr_t smbus_base(void) |
| { |
| return SMBUS_IO_BASE; |
| } |
| |
| int smbus_enable_iobar(uintptr_t base) |
| { |
| u8 reg8; |
| u16 reg16; |
| |
| /* Get the SMBus/PM device of the 82371AB/EB/MB. */ |
| const pci_devfn_t dev = pci_locate_device(PCI_ID(PCI_VID_INTEL, |
| PCI_DID_INTEL_82371AB_SMB_ACPI), 0); |
| |
| /* Set the SMBus I/O base. */ |
| pci_write_config32(dev, SMBBA, base | 1); |
| |
| /* Enable the SMBus controller host interface. */ |
| reg8 = pci_read_config8(dev, SMBHSTCFG); |
| reg8 |= SMB_HST_EN; |
| pci_write_config8(dev, SMBHSTCFG, reg8); |
| |
| /* Enable access to the SMBus I/O space. */ |
| reg16 = pci_read_config16(dev, PCI_COMMAND); |
| reg16 |= PCI_COMMAND_IO; |
| pci_write_config16(dev, PCI_COMMAND, reg16); |
| |
| return 0; |
| } |