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
  33 #include <asm/emma/emma2rh.h>
  34
  35 #define EMMA2RH_PCI_HOST_SLOT 0x09
  36 #define EMMA2RH_USB_SLOT 0x03
  37 #define PCI_DEVICE_ID_NEC_EMMA2RH      0x014b /* EMMA2RH PCI Host */
  38
  39 /*
  40  * we fix up irqs based on the slot number.
  41  * The first entry is at AD:11.
  42  * Fortunately this works because, although we have two pci buses,
  43  * they all have different slot numbers (except for rockhopper slot 20
  44  * which is handled below).
  45  *
  46  */
  47
  48 #define MAX_SLOT_NUM 10
  49 static unsigned char irq_map[][5] __initdata = {
  50         [3] = {0, MARKEINS_PCI_IRQ_INTB, MARKEINS_PCI_IRQ_INTC,
  51                MARKEINS_PCI_IRQ_INTD, 0,},
  52         [4] = {0, MARKEINS_PCI_IRQ_INTA, 0, 0, 0,},
  53         [5] = {0, 0, 0, 0, 0,},
  54         [6] = {0, MARKEINS_PCI_IRQ_INTC, MARKEINS_PCI_IRQ_INTD,
  55                MARKEINS_PCI_IRQ_INTA, MARKEINS_PCI_IRQ_INTB,},
  56 };
  57
  58 static void __devinit nec_usb_controller_fixup(struct pci_dev *dev)
  59 {
  60         if (PCI_SLOT(dev->devfn) == EMMA2RH_USB_SLOT)
  61                 /* on board USB controller configuration */
  62                 pci_write_config_dword(dev, 0xe4, 1 << 5);
  63 }
  64
  65 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_USB,
  66                         nec_usb_controller_fixup);
  67
  68 /*
  69  * Prevent the PCI layer from seeing the resources allocated to this device
  70  * if it is the host bridge by marking it as such.  These resources are of
  71  * no consequence to the PCI layer (they are handled elsewhere).
  72  */
  73 static void __devinit emma2rh_pci_host_fixup(struct pci_dev *dev)
  74 {
  75         int i;
  76
  77         if (PCI_SLOT(dev->devfn) == EMMA2RH_PCI_HOST_SLOT) {
  78                 dev->class &= 0xff;
  79                 dev->class |= PCI_CLASS_BRIDGE_HOST << 8;
  80                 for (i = 0; i < PCI_NUM_RESOURCES; i++) {
  81                         dev->resource[i].start = 0;
  82                         dev->resource[i].end = 0;
  83                         dev->resource[i].flags = 0;
  84                 }
  85         }
  86 }
  87
  88 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_EMMA2RH,
  89                          emma2rh_pci_host_fixup);
  90
  91 int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
  92 {
  93         return irq_map[slot][pin];
  94 }
  95
  96 /* Do platform specific device initialization at pci_enable_device() time */
  97 int pcibios_plat_dev_init(struct pci_dev *dev)
  98 {
  99         return 0;
 100 }