src/southbridge/intel/i82801gx/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 "i82801gx.h"
   8
   9 static void pci_init(struct device *dev)
  10 {
  11         u16 reg16;
  12
  13         /* Enable Bus Master */
  14         pci_or_config16(dev, PCI_COMMAND, PCI_COMMAND_MASTER);
  15
  16         /* This device has no interrupt */
  17         pci_write_config8(dev, INTR, 0xff);
  18
  19         /* Disable parity error response and SERR */
  20         pci_and_config16(dev, PCI_BRIDGE_CONTROL,
  21                          ~(PCI_BRIDGE_CTL_PARITY | PCI_BRIDGE_CTL_SERR));
  22
  23         /* Master Latency Count must be set to 0x04! */
  24         pci_update_config8(dev, SMLT, 0x07, 0x04 << 3);
  25
  26         /* Clear errors in status registers. FIXME: Do something? */
  27         reg16 = pci_read_config16(dev, PSTS);
  28         //reg16 |= 0xf900;
  29         pci_write_config16(dev, PSTS, reg16);
  30
  31         reg16 = pci_read_config16(dev, SECSTS);
  32         // reg16 |= 0xf900;
  33         pci_write_config16(dev, SECSTS, reg16);
  34 }
  35
  36 static struct device_operations device_ops = {
  37         .read_resources         = pci_bus_read_resources,
  38         .set_resources          = pci_dev_set_resources,
  39         .enable_resources       = pci_bus_enable_resources,
  40         .init                   = pci_init,
  41         .scan_bus               = pci_scan_bridge,
  42         .ops_pci                = &pci_dev_ops_pci,
  43 };
  44
  45 /* Desktop */
  46 /* 82801BA/CA/DB/EB/ER/FB/FR/FW/FRW/GB/GR/GDH/HB/IB/6300ESB/i3100 */
  47 static const struct pci_driver i82801g_pci __pci_driver = {
  48         .ops    = &device_ops,
  49         .vendor = PCI_VID_INTEL,
  50         .device = 0x244e,
  51 };
  52
  53 /* Mobile / Ultra Mobile */
  54 /* 82801BAM/CAM/DBL/DBM/FBM/GBM/GHM/GU/HBM/HEM */
  55 static const struct pci_driver i82801gmu_pci __pci_driver = {
  56         .ops    = &device_ops,
  57         .vendor = PCI_VID_INTEL,
  58         .device = 0x2448,
  59 };