arch/mips/pci/pci-emma2rh.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *  Copyright (C) NEC Electronics Corporation 2004-2006
   4  *
   5  *  This file is based on the arch/mips/ddb5xxx/ddb5477/pci.c
   6  *
   7  *      Copyright 2001 MontaVista Software Inc.
   8  */
   9
  10 #include <linux/kernel.h>
  11 #include <linux/init.h>
  12 #include <linux/types.h>
  13 #include <linux/pci.h>
  14
  15 #include <asm/bootinfo.h>
  16
  17 #include <asm/emma/emma2rh.h>
  18
  19 static struct resource pci_io_resource = {
  20         .name = "pci IO space",
  21         .start = EMMA2RH_PCI_IO_BASE,
  22         .end = EMMA2RH_PCI_IO_BASE + EMMA2RH_PCI_IO_SIZE - 1,
  23         .flags = IORESOURCE_IO,
  24 };
  25
  26 static struct resource pci_mem_resource = {
  27         .name = "pci memory space",
  28         .start = EMMA2RH_PCI_MEM_BASE,
  29         .end = EMMA2RH_PCI_MEM_BASE + EMMA2RH_PCI_MEM_SIZE - 1,
  30         .flags = IORESOURCE_MEM,
  31 };
  32
  33 extern struct pci_ops emma2rh_pci_ops;
  34
  35 static struct pci_controller emma2rh_pci_controller = {
  36         .pci_ops = &emma2rh_pci_ops,
  37         .mem_resource = &pci_mem_resource,
  38         .io_resource = &pci_io_resource,
  39         .mem_offset = -0x04000000,
  40         .io_offset = 0,
  41 };
  42
  43 static void __init emma2rh_pci_init(void)
  44 {
  45         /* setup PCI interface */
  46         emma2rh_out32(EMMA2RH_PCI_ARBIT_CTR, 0x70f);
  47
  48         emma2rh_out32(EMMA2RH_PCI_IWIN0_CTR, 0x80000a18);
  49         emma2rh_out32(EMMA2RH_PCI_CONFIG_BASE + PCI_COMMAND,
  50                       PCI_STATUS_DEVSEL_MEDIUM | PCI_STATUS_CAP_LIST |
  51                       PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY);
  52         emma2rh_out32(EMMA2RH_PCI_CONFIG_BASE + PCI_BASE_ADDRESS_0, 0x10000000);
  53         emma2rh_out32(EMMA2RH_PCI_CONFIG_BASE + PCI_BASE_ADDRESS_1, 0x00000000);
  54
  55         emma2rh_out32(EMMA2RH_PCI_IWIN0_CTR, 0x12000000 | 0x218);
  56         emma2rh_out32(EMMA2RH_PCI_IWIN1_CTR, 0x18000000 | 0x600);
  57         emma2rh_out32(EMMA2RH_PCI_INIT_ESWP, 0x00000200);
  58
  59         emma2rh_out32(EMMA2RH_PCI_TWIN_CTR, 0x00009200);
  60         emma2rh_out32(EMMA2RH_PCI_TWIN_BADR, 0x00000000);
  61         emma2rh_out32(EMMA2RH_PCI_TWIN0_DADR, 0x00000000);
  62         emma2rh_out32(EMMA2RH_PCI_TWIN1_DADR, 0x00000000);
  63 }
  64
  65 static int __init emma2rh_pci_setup(void)
  66 {
  67         emma2rh_pci_init();
  68         register_pci_controller(&emma2rh_pci_controller);
  69         return 0;
  70 }
  71
  72 arch_initcall(emma2rh_pci_setup);