arch/mips/pci/fixup-emma2rh.c

   1 /*
   2  *  arch/mips/pci/fixup-emma2rh.c
   3  *      This file defines the PCI configration.
   4  *
   5  *  Copyright (C) NEC Electronics Corporation 2004-2006
   6  *
   7  *  This file is based on the arch/mips/ddb5xxx/ddb5477/pci.c
   8  *
   9  *      Copyright 2001 MontaVista Software Inc.
  10  *
  11  *  This program is free software; you can redistribute it and/or modify
  12  *  it under the terms of the GNU General Public License as published by
  13  *  the Free Software Foundation; either version 2 of the License, or
  14  *  (at your option) any later version.
  15  *
  16  *  This program is distributed in the hope that it will be useful,
  17  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  *  GNU General Public License for more details.
  20  *
  21  *  You should have received a copy of the GNU General Public License
  22  *  along with this program; if not, write to the Free Software
  23  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  24  */
  25
  26 #include <linux/kernel.h>
  27 #include <linux/init.h>
  28 #include <linux/types.h>
  29 #include <linux/pci.h>
  30
  31 #include <asm/bootinfo.h>
  32 #include <asm/debug.h>
  33
  34 #include <asm/emma2rh/emma2rh.h>
  35
  36 #define EMMA2RH_PCI_HOST_SLOT 0x09
  37 #define EMMA2RH_USB_SLOT 0x03
  38 #define PCI_DEVICE_ID_NEC_EMMA2RH      0x014b /* EMMA2RH PCI Host */
  39
  40 /*
  41  * we fix up irqs based on the slot number.
  42  * The first entry is at AD:11.
  43  * Fortunately this works because, although we have two pci buses,
  44  * they all have different slot numbers (except for rockhopper slot 20
  45  * which is handled below).
  46  *
  47  */
  48
  49 #define MAX_SLOT_NUM 10
  50 static unsigned char irq_map[][5] __initdata = {
  51         [3] = {0, MARKEINS_PCI_IRQ_INTB, MARKEINS_PCI_IRQ_INTC,
  52                MARKEINS_PCI_IRQ_INTD, 0,},
  53         [4] = {0, MARKEINS_PCI_IRQ_INTA, 0, 0, 0,},
  54         [5] = {0, 0, 0, 0, 0,},
  55         [6] = {0, MARKEINS_PCI_IRQ_INTC, MARKEINS_PCI_IRQ_INTD,
  56                MARKEINS_PCI_IRQ_INTA, MARKEINS_PCI_IRQ_INTB,},
  57 };
  58
  59 static void __devinit nec_usb_controller_fixup(struct pci_dev *dev)
  60 {
  61         if (PCI_SLOT(dev->devfn) == EMMA2RH_USB_SLOT)
  62                 /* on board USB controller configuration */
  63                 pci_write_config_dword(dev, 0xe4, 1 << 5);
  64 }
  65
  66 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_USB,
  67                         nec_usb_controller_fixup);
  68
  69 /*
  70  * Prevent the PCI layer from seeing the resources allocated to this device
  71  * if it is the host bridge by marking it as such.  These resources are of
  72  * no consequence to the PCI layer (they are handled elsewhere).
  73  */
  74 static void __devinit emma2rh_pci_host_fixup(struct pci_dev *dev)
  75 {
  76         int i;
  77
  78         if (PCI_SLOT(dev->devfn) == EMMA2RH_PCI_HOST_SLOT) {
  79                 dev->class &= 0xff;
  80                 dev->class |= PCI_CLASS_BRIDGE_HOST << 8;
  81                 for (i = 0; i < PCI_NUM_RESOURCES; i++) {
  82                         dev->resource[i].start = 0;
  83                         dev->resource[i].end = 0;
  84                         dev->resource[i].flags = 0;
  85                 }
  86         }
  87 }
  88
  89 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_EMMA2RH,
  90                          emma2rh_pci_host_fixup);
  91
  92 int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
  93 {
  94         return irq_map[slot][pin];
  95 }
  96
  97 /* Do platform specific device initialization at pci_enable_device() time */
  98 int pcibios_plat_dev_init(struct pci_dev *dev)
  99 {
 100         return 0;
 101 }