git.sur5r.net Git - u-boot/blob - arch/x86/cpu/broadwell/northbridge.c

   1 /*
   2  * Copyright (C) 2011 The Chromium Authors
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0
   5  */
   6
   7 #include <common.h>
   8 #include <dm.h>
   9 #include <asm/io.h>
  10 #include <asm/arch/iomap.h>
  11 #include <asm/arch/pch.h>
  12
  13 static int broadwell_northbridge_early_init(struct udevice *dev)
  14 {
  15         /* Move earlier? */
  16         dm_pci_write_config32(dev, PCIEXBAR + 4, 0);
  17         /* 64MiB - 0-63 buses */
  18         dm_pci_write_config32(dev, PCIEXBAR, MCFG_BASE_ADDRESS | 4 | 1);
  19
  20         dm_pci_write_config32(dev, MCHBAR, MCH_BASE_ADDRESS | 1);
  21         dm_pci_write_config32(dev, DMIBAR, DMI_BASE_ADDRESS | 1);
  22         dm_pci_write_config32(dev, EPBAR, EP_BASE_ADDRESS | 1);
  23         writel(EDRAM_BASE_ADDRESS | 1, MCH_BASE_ADDRESS + EDRAMBAR);
  24         writel(GDXC_BASE_ADDRESS | 1, MCH_BASE_ADDRESS + GDXCBAR);
  25
  26         /* Set C0000-FFFFF to access RAM on both reads and writes */
  27         dm_pci_write_config8(dev, PAM0, 0x30);
  28         dm_pci_write_config8(dev, PAM1, 0x33);
  29         dm_pci_write_config8(dev, PAM2, 0x33);
  30         dm_pci_write_config8(dev, PAM3, 0x33);
  31         dm_pci_write_config8(dev, PAM4, 0x33);
  32         dm_pci_write_config8(dev, PAM5, 0x33);
  33         dm_pci_write_config8(dev, PAM6, 0x33);
  34
  35         /* Device enable: IGD and Mini-HD */
  36         dm_pci_write_config32(dev, DEVEN, DEVEN_D0EN | DEVEN_D2EN | DEVEN_D3EN);
  37
  38         return 0;
  39 }
  40
  41 static int broadwell_northbridge_probe(struct udevice *dev)
  42 {
  43         if (!(gd->flags & GD_FLG_RELOC))
  44                 return broadwell_northbridge_early_init(dev);
  45
  46         return 0;
  47 }
  48
  49 static const struct udevice_id broadwell_northbridge_ids[] = {
  50         { .compatible = "intel,broadwell-northbridge" },
  51         { }
  52 };
  53
  54 U_BOOT_DRIVER(broadwell_northbridge_drv) = {
  55         .name           = "broadwell_northbridge",
  56         .id             = UCLASS_NORTHBRIDGE,
  57         .of_match       = broadwell_northbridge_ids,
  58         .probe          = broadwell_northbridge_probe,
  59 };