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
  46 static unsigned char irq_map[][5] = {
  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
  55 static 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
  62 DECLARE_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  */
  70 static 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
  85 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_EMMA2RH,
  86                          emma2rh_pci_host_fixup);
  87
  88 int 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 */
  94 int pcibios_plat_dev_init(struct pci_dev *dev)
  95 {
  96         return 0;
  97 }