LXR linux/arch/mips/pci/fixup-emma2rh.c

   1/*
   2 *  Copyright (C) NEC Electronics Corporation 2004-2006
   3 *
   4 *  This file is based on the arch/mips/ddb5xxx/ddb5477/pci.c
   5 *
   6 *      Copyright 2001 MontaVista Software Inc.
   7 *
   8 *  This program is free software; you can redistribute it and/or modify
   9 *  it under the terms of the GNU General Public License as published by
  10 *  the Free Software Foundation; either version 2 of the License, or
  11 *  (at your option) any later version.
  12 *
  13 *  This program is distributed in the hope that it will be useful,
  14 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 *  GNU General Public License for more details.
  17 *
  18 *  You should have received a copy of the GNU General Public License
  19 *  along with this program; if not, write to the Free Software
  20 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21 */
  22
  23#include <linux/kernel.h>
  24#include <linux/init.h>
  25#include <linux/types.h>
  26#include <linux/pci.h>
  27
  28#include <asm/bootinfo.h>
  29
  30#include <asm/emma/emma2rh.h>
  31
  32#define EMMA2RH_PCI_HOST_SLOT 0x09
  33#define EMMA2RH_USB_SLOT 0x03
  34#define PCI_DEVICE_ID_NEC_EMMA2RH      0x014b /* EMMA2RH PCI Host */
  35
  36/*
  37 * we fix up irqs based on the slot number.
  38 * The first entry is at AD:11.
  39 * Fortunately this works because, although we have two pci buses,
  40 * they all have different slot numbers (except for rockhopper slot 20
  41 * which is handled below).
  42 *
  43 */
  44
  45#define MAX_SLOT_NUM 10
  46static unsigned char irq_map[][5] __initdata = {
  47        [3] = {0, MARKEINS_PCI_IRQ_INTB, MARKEINS_PCI_IRQ_INTC,
  48               MARKEINS_PCI_IRQ_INTD, 0,},
  49        [4] = {0, MARKEINS_PCI_IRQ_INTA, 0, 0, 0,},
  50        [5] = {0, 0, 0, 0, 0,},
  51        [6] = {0, MARKEINS_PCI_IRQ_INTC, MARKEINS_PCI_IRQ_INTD,
  52               MARKEINS_PCI_IRQ_INTA, MARKEINS_PCI_IRQ_INTB,},
  53};
  54
  55static void nec_usb_controller_fixup(struct pci_dev *dev)
  56{
  57        if (PCI_SLOT(dev->devfn) == EMMA2RH_USB_SLOT)
  58                /* on board USB controller configuration */
  59                pci_write_config_dword(dev, 0xe4, 1 << 5);
  60}
  61
  62DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_USB,
  63                        nec_usb_controller_fixup);
  64
  65/*
  66 * Prevent the PCI layer from seeing the resources allocated to this device
  67 * if it is the host bridge by marking it as such.  These resources are of
  68 * no consequence to the PCI layer (they are handled elsewhere).
  69 */
  70static void emma2rh_pci_host_fixup(struct pci_dev *dev)
  71{
  72        int i;
  73
  74        if (PCI_SLOT(dev->devfn) == EMMA2RH_PCI_HOST_SLOT) {
  75                dev->class &= 0xff;
  76                dev->class |= PCI_CLASS_BRIDGE_HOST << 8;
  77                for (i = 0; i < PCI_NUM_RESOURCES; i++) {
  78                        dev->resource[i].start = 0;
  79                        dev->resource[i].end = 0;
  80                        dev->resource[i].flags = 0;
  81                }
  82        }
  83}
  84
  85DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_EMMA2RH,
  86                         emma2rh_pci_host_fixup);
  87
  88int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
  89{
  90        return irq_map[slot][pin];
  91}
  92
  93/* Do platform specific device initialization at pci_enable_device() time */
  94int pcibios_plat_dev_init(struct pci_dev *dev)
  95{
  96        return 0;
  97}
  98