| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <console/console.h> |
| #include <device/device.h> |
| #include <device/pci.h> |
| #include <device/pci_ops.h> |
| #include <device/pci_ids.h> |
| #include "pch.h" |
| |
| static void pci_init(struct device *dev) |
| { |
| u16 reg16; |
| |
| printk(BIOS_DEBUG, "PCI init.\n"); |
| /* Enable Bus Master */ |
| pci_or_config16(dev, PCI_COMMAND, PCI_COMMAND_MASTER); |
| |
| /* This device has no interrupt */ |
| pci_write_config8(dev, INTR, 0xff); |
| |
| /* disable parity error response and SERR */ |
| pci_and_config16(dev, PCI_BRIDGE_CONTROL, |
| ~(PCI_BRIDGE_CTL_PARITY | PCI_BRIDGE_CTL_SERR)); |
| |
| /* Master Latency Count must be set to 0x04! */ |
| pci_update_config8(dev, SMLT, 0x07, (0x04 << 3)); |
| |
| /* Clear errors in status registers. FIXME: do we need to do something? */ |
| reg16 = pci_read_config16(dev, PSTS); |
| //reg16 |= 0xf900; |
| pci_write_config16(dev, PSTS, reg16); |
| |
| reg16 = pci_read_config16(dev, SECSTS); |
| // reg16 |= 0xf900; |
| pci_write_config16(dev, SECSTS, reg16); |
| } |
| |
| static struct device_operations device_ops = { |
| .read_resources = pci_bus_read_resources, |
| .set_resources = pci_dev_set_resources, |
| .enable_resources = pci_bus_enable_resources, |
| .init = pci_init, |
| .scan_bus = pci_scan_bridge, |
| .ops_pci = &pci_dev_ops_pci, |
| }; |
| |
| static const unsigned short pci_device_ids[] = { |
| 0x2448, /* Mobile */ |
| 0x244e, /* Desktop */ |
| 0 |
| }; |
| |
| static const struct pci_driver pch_pci __pci_driver = { |
| .ops = &device_ops, |
| .vendor = PCI_VID_INTEL, |
| .devices = pci_device_ids, |
| }; |