arch/x86/cpu/ivybridge/pci.c

   1 /*
   2  * Copyright (c) 2011 The Chromium OS Authors.
   3  * (C) Copyright 2008,2009
   4  * Graeme Russ, <graeme.russ@gmail.com>
   5  *
   6  * (C) Copyright 2002
   7  * Daniel Engström, Omicron Ceti AB, <daniel@omicron.se>
   8  *
   9  * SPDX-License-Identifier:     GPL-2.0+
  10  */
  11
  12 #include <common.h>
  13 #include <dm.h>
  14 #include <pci.h>
  15 #include <asm/pci.h>
  16 #include <asm/post.h>
  17 #include <asm/arch/bd82x6x.h>
  18 #include <asm/arch/pch.h>
  19
  20 static int pci_ivybridge_probe(struct udevice *bus)
  21 {
  22         struct pci_controller *hose = dev_get_uclass_priv(bus);
  23         pci_dev_t dev;
  24         u16 reg16;
  25
  26         if (!(gd->flags & GD_FLG_RELOC))
  27                 return 0;
  28         post_code(0x50);
  29         bd82x6x_init();
  30         post_code(0x51);
  31
  32         reg16 = 0xff;
  33         dev = PCH_DEV;
  34         reg16 = x86_pci_read_config16(dev, PCI_COMMAND);
  35         reg16 |= PCI_COMMAND_SERR | PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
  36         x86_pci_write_config16(dev, PCI_COMMAND, reg16);
  37
  38         /*
  39         * Clear non-reserved bits in status register.
  40         */
  41         pci_hose_write_config_word(hose, dev, PCI_STATUS, 0xffff);
  42         pci_hose_write_config_byte(hose, dev, PCI_LATENCY_TIMER, 0x80);
  43         pci_hose_write_config_byte(hose, dev, PCI_CACHE_LINE_SIZE, 0x08);
  44
  45         pci_write_bar32(hose, dev, 0, 0xf0000000);
  46         post_code(0x52);
  47
  48         return 0;
  49 }
  50
  51 static const struct dm_pci_ops pci_ivybridge_ops = {
  52         .read_config    = pci_x86_read_config,
  53         .write_config   = pci_x86_write_config,
  54 };
  55
  56 static const struct udevice_id pci_ivybridge_ids[] = {
  57         { .compatible = "intel,pci-ivybridge" },
  58         { }
  59 };
  60
  61 U_BOOT_DRIVER(pci_ivybridge_drv) = {
  62         .name           = "pci_ivybridge",
  63         .id             = UCLASS_PCI,
  64         .of_match       = pci_ivybridge_ids,
  65         .ops            = &pci_ivybridge_ops,
  66         .probe          = pci_ivybridge_probe,
  67 };