LXR linux/arch/mips/pci/fixup-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#define EMMA2RH_PCI_HOST_SLOT 0x09
  20#define EMMA2RH_USB_SLOT 0x03
  21#define PCI_DEVICE_ID_NEC_EMMA2RH      0x014b /* EMMA2RH PCI Host */
  22
  23/*
  24 * we fix up irqs based on the slot number.
  25 * The first entry is at AD:11.
  26 * Fortunately this works because, although we have two pci buses,
  27 * they all have different slot numbers (except for rockhopper slot 20
  28 * which is handled below).
  29 *
  30 */
  31
  32#define MAX_SLOT_NUM 10
  33static unsigned char irq_map[][5] = {
  34        [3] = {0, MARKEINS_PCI_IRQ_INTB, MARKEINS_PCI_IRQ_INTC,
  35               MARKEINS_PCI_IRQ_INTD, 0,},
  36        [4] = {0, MARKEINS_PCI_IRQ_INTA, 0, 0, 0,},
  37        [5] = {0, 0, 0, 0, 0,},
  38        [6] = {0, MARKEINS_PCI_IRQ_INTC, MARKEINS_PCI_IRQ_INTD,
  39               MARKEINS_PCI_IRQ_INTA, MARKEINS_PCI_IRQ_INTB,},
  40};
  41
  42static void nec_usb_controller_fixup(struct pci_dev *dev)
  43{
  44        if (PCI_SLOT(dev->devfn) == EMMA2RH_USB_SLOT)
  45                /* on board USB controller configuration */
  46                pci_write_config_dword(dev, 0xe4, 1 << 5);
  47}
  48
  49DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_USB,
  50                        nec_usb_controller_fixup);
  51
  52/*
  53 * Prevent the PCI layer from seeing the resources allocated to this device
  54 * if it is the host bridge by marking it as such.  These resources are of
  55 * no consequence to the PCI layer (they are handled elsewhere).
  56 */
  57static void emma2rh_pci_host_fixup(struct pci_dev *dev)
  58{
  59        int i;
  60
  61        if (PCI_SLOT(dev->devfn) == EMMA2RH_PCI_HOST_SLOT) {
  62                dev->class &= 0xff;
  63                dev->class |= PCI_CLASS_BRIDGE_HOST << 8;
  64                for (i = 0; i < PCI_NUM_RESOURCES; i++) {
  65                        dev->resource[i].start = 0;
  66                        dev->resource[i].end = 0;
  67                        dev->resource[i].flags = 0;
  68                }
  69        }
  70}
  71
  72DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_EMMA2RH,
  73                         emma2rh_pci_host_fixup);
  74
  75int pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
  76{
  77        return irq_map[slot][pin];
  78}
  79
  80/* Do platform specific device initialization at pci_enable_device() time */
  81int pcibios_plat_dev_init(struct pci_dev *dev)
  82{
  83        return 0;
  84}
  85