LXR linux/arch/arm/mach-ixp4xx/nas100d-pci.c

   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * arch/arm/mach-ixp4xx/nas100d-pci.c
   4 *
   5 * NAS 100d board-level PCI initialization
   6 *
   7 * based on ixdp425-pci.c:
   8 *      Copyright (C) 2002 Intel Corporation.
   9 *      Copyright (C) 2003-2004 MontaVista Software, Inc.
  10 *
  11 * Maintainer: http://www.nslu2-linux.org/
  12 */
  13
  14#include <linux/pci.h>
  15#include <linux/init.h>
  16#include <linux/irq.h>
  17#include <asm/mach/pci.h>
  18#include <asm/mach-types.h>
  19
  20#include "irqs.h"
  21
  22#define MAX_DEV         3
  23#define IRQ_LINES       3
  24
  25/* PCI controller GPIO to IRQ pin mappings */
  26#define INTA            11
  27#define INTB            10
  28#define INTC            9
  29#define INTD            8
  30#define INTE            7
  31
  32void __init nas100d_pci_preinit(void)
  33{
  34        irq_set_irq_type(IXP4XX_GPIO_IRQ(INTA), IRQ_TYPE_LEVEL_LOW);
  35        irq_set_irq_type(IXP4XX_GPIO_IRQ(INTB), IRQ_TYPE_LEVEL_LOW);
  36        irq_set_irq_type(IXP4XX_GPIO_IRQ(INTC), IRQ_TYPE_LEVEL_LOW);
  37        irq_set_irq_type(IXP4XX_GPIO_IRQ(INTD), IRQ_TYPE_LEVEL_LOW);
  38        irq_set_irq_type(IXP4XX_GPIO_IRQ(INTE), IRQ_TYPE_LEVEL_LOW);
  39        ixp4xx_pci_preinit();
  40}
  41
  42static int __init nas100d_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
  43{
  44        static int pci_irq_table[MAX_DEV][IRQ_LINES] = {
  45                { IXP4XX_GPIO_IRQ(INTA), -1, -1 },
  46                { IXP4XX_GPIO_IRQ(INTB), -1, -1 },
  47                { IXP4XX_GPIO_IRQ(INTC), IXP4XX_GPIO_IRQ(INTD),
  48                  IXP4XX_GPIO_IRQ(INTE) },
  49        };
  50
  51        if (slot >= 1 && slot <= MAX_DEV && pin >= 1 && pin <= IRQ_LINES)
  52                return pci_irq_table[slot - 1][pin - 1];
  53
  54        return -1;
  55}
  56
  57struct hw_pci __initdata nas100d_pci = {
  58        .nr_controllers = 1,
  59        .ops            = &ixp4xx_ops,
  60        .preinit        = nas100d_pci_preinit,
  61        .setup          = ixp4xx_setup,
  62        .map_irq        = nas100d_map_irq,
  63};
  64
  65int __init nas100d_pci_init(void)
  66{
  67        if (machine_is_nas100d())
  68                pci_common_init(&nas100d_pci);
  69
  70        return 0;
  71}
  72
  73subsys_initcall(nas100d_pci_init);
  74