arch/x86/cpu/quark/pci.c

   1 /*
   2  * Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <common.h>
   8 #include <pci.h>
   9 #include <asm/pci.h>
  10 #include <asm/arch/device.h>
  11
  12 DECLARE_GLOBAL_DATA_PTR;
  13
  14 void board_pci_setup_hose(struct pci_controller *hose)
  15 {
  16         hose->first_busno = 0;
  17         hose->last_busno = 0;
  18
  19         /* PCI memory space */
  20         pci_set_region(hose->regions + 0,
  21                        CONFIG_PCI_MEM_BUS,
  22                        CONFIG_PCI_MEM_PHYS,
  23                        CONFIG_PCI_MEM_SIZE,
  24                        PCI_REGION_MEM);
  25
  26         /* PCI IO space */
  27         pci_set_region(hose->regions + 1,
  28                        CONFIG_PCI_IO_BUS,
  29                        CONFIG_PCI_IO_PHYS,
  30                        CONFIG_PCI_IO_SIZE,
  31                        PCI_REGION_IO);
  32
  33         pci_set_region(hose->regions + 2,
  34                        CONFIG_PCI_PREF_BUS,
  35                        CONFIG_PCI_PREF_PHYS,
  36                        CONFIG_PCI_PREF_SIZE,
  37                        PCI_REGION_PREFETCH);
  38
  39         pci_set_region(hose->regions + 3,
  40                        0,
  41                        0,
  42                        gd->ram_size,
  43                        PCI_REGION_MEM | PCI_REGION_SYS_MEMORY);
  44
  45         hose->region_count = 4;
  46 }
  47
  48 int board_pci_post_scan(struct pci_controller *hose)
  49 {
  50         return 0;
  51 }
  52
  53 int pci_skip_dev(struct pci_controller *hose, pci_dev_t dev)
  54 {
  55         /*
  56          * TODO:
  57          *
  58          * For some unknown reason, the PCI enumeration process hangs
  59          * when it scans to the PCIe root port 0 (D23:F0) & 1 (D23:F1).
  60          *
  61          * For now we just skip these two devices, and this needs to
  62          * be revisited later.
  63          */
  64         if (dev == QUARK_HOST_BRIDGE ||
  65             dev == QUARK_PCIE0 || dev == QUARK_PCIE1) {
  66                 return 1;
  67         }
  68
  69         return 0;
  70 }