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