src/southbridge/intel/i82801ix/pci.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <device/device.h>
   4 #include <device/pci.h>
   5 #include <device/pci_ops.h>
   6 #include <device/pci_ids.h>
   7 #include "i82801ix.h"
   8
   9 static void pci_init(struct device *dev)
  10 {
  11         u16 reg16;
  12
  13         /* This device has no interrupt */
  14         pci_write_config8(dev, PCI_INTERRUPT_LINE, 0xff);
  15
  16         /* Master Latency Count must be set to 0x04! */
  17         pci_update_config8(dev, D30F0_SMLT, 0x07, 0x04 << 3);
  18
  19         /* Clear errors in status registers. FIXME: Do something? */
  20         reg16 = pci_read_config16(dev, PCI_STATUS);
  21         //reg16 |= 0xf900;
  22         pci_write_config16(dev, PCI_STATUS, reg16);
  23
  24         reg16 = pci_read_config16(dev, PCI_SEC_STATUS);
  25         // reg16 |= 0xf900;
  26         pci_write_config16(dev, PCI_SEC_STATUS, reg16);
  27 }
  28
  29 static struct device_operations device_ops = {
  30         .read_resources         = pci_bus_read_resources,
  31         .set_resources          = pci_dev_set_resources,
  32         .enable_resources       = pci_bus_enable_resources,
  33         .init                   = pci_init,
  34         .scan_bus               = pci_scan_bridge,
  35         .reset_bus              = pci_bus_reset,
  36         .ops_pci                = &pci_dev_ops_pci,
  37 };
  38
  39 static const unsigned short pci_device_ids[] = {
  40         0x244e, /* Desktop */
  41         0x2448, /* Mobile */
  42         0
  43 };
  44
  45 static const struct pci_driver ich9_pci __pci_driver = {
  46         .ops            = &device_ops,
  47         .vendor         = PCI_VID_INTEL,
  48         .devices        = pci_device_ids,
  49 };