LXR linux/arch/arm/mach-ixp4xx/gtwx5715-pci.c

   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * arch/arm/mach-ixp4xx/gtwx5715-pci.c
   4 *
   5 * Gemtek GTWX5715 (Linksys WRV54G) board setup
   6 *
   7 * Copyright (C) 2004 George T. Joseph
   8 * Derived from Coyote
   9 */
  10
  11#include <linux/pci.h>
  12#include <linux/init.h>
  13#include <linux/delay.h>
  14#include <linux/irq.h>
  15#include <asm/mach-types.h>
  16#include <mach/hardware.h>
  17#include <asm/mach/pci.h>
  18
  19#include "irqs.h"
  20
  21#define SLOT0_DEVID     0
  22#define SLOT1_DEVID     1
  23#define INTA            10 /* slot 1 has INTA and INTB crossed */
  24#define INTB            11
  25
  26/*
  27 * Slot 0 isn't actually populated with a card connector but
  28 * we initialize it anyway in case a future version has the
  29 * slot populated or someone with good soldering skills has
  30 * some free time.
  31 */
  32void __init gtwx5715_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        ixp4xx_pci_preinit();
  37}
  38
  39
  40static int __init gtwx5715_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
  41{
  42        int rc = -1;
  43
  44        if ((slot == SLOT0_DEVID && pin == 1) ||
  45            (slot == SLOT1_DEVID && pin == 2))
  46                rc = IXP4XX_GPIO_IRQ(INTA);
  47        else if ((slot == SLOT0_DEVID && pin == 2) ||
  48                 (slot == SLOT1_DEVID && pin == 1))
  49                rc = IXP4XX_GPIO_IRQ(INTB);
  50
  51        printk(KERN_INFO "%s: Mapped slot %d pin %d to IRQ %d\n",
  52               __func__, slot, pin, rc);
  53        return rc;
  54}
  55
  56struct hw_pci gtwx5715_pci __initdata = {
  57        .nr_controllers = 1,
  58        .ops            = &ixp4xx_ops,
  59        .preinit =        gtwx5715_pci_preinit,
  60        .setup =          ixp4xx_setup,
  61        .map_irq =        gtwx5715_map_irq,
  62};
  63
  64int __init gtwx5715_pci_init(void)
  65{
  66        if (machine_is_gtwx5715())
  67                pci_common_init(&gtwx5715_pci);
  68
  69        return 0;
  70}
  71
  72subsys_initcall(gtwx5715_pci_init);
  73