1/*
2 * arch/arm/mach-ixp4xx/gtwx5715-pci.c
3 *
4 * Gemtek GTWX5715 (Linksys WRV54G) board setup
5 *
6 * Copyright (C) 2004 George T. Joseph
7 * Derived from Coyote
8 *
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License
11 * as published by the Free Software Foundation; either version 2
12 * of the License, or (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
22 *
23 */
24
25#include <linux/pci.h>
26#include <linux/init.h>
27#include <linux/delay.h>
28#include <asm/mach-types.h>
29#include <asm/hardware.h>
30#include <asm/irq.h>
31#include <asm/arch/gtwx5715.h>
32#include <asm/mach/pci.h>
33
34extern void ixp4xx_pci_preinit(void);
35extern int ixp4xx_setup(int nr, struct pci_sys_data *sys);
36extern struct pci_bus *ixp4xx_scan_bus(int nr, struct pci_sys_data *sys);
37
38
39/*
40 * The exact GPIO pins and IRQs are defined in arch-ixp4xx/gtwx5715.h
41 * Slot 0 isn't actually populated with a card connector but
42 * we initialize it anyway in case a future version has the
43 * slot populated or someone with good soldering skills has
44 * some free time.
45 */
46void __init gtwx5715_pci_preinit(void)
47{
48	set_irq_type(GTWX5715_PCI_SLOT0_INTA_IRQ, IRQT_LOW);
49	set_irq_type(GTWX5715_PCI_SLOT0_INTB_IRQ, IRQT_LOW);
50	set_irq_type(GTWX5715_PCI_SLOT1_INTA_IRQ, IRQT_LOW);
51	set_irq_type(GTWX5715_PCI_SLOT1_INTB_IRQ, IRQT_LOW);
52
53	ixp4xx_pci_preinit();
54}
55
56
57static int __init gtwx5715_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
58{
59	int rc;
60	static int gtwx5715_irqmap
61			[GTWX5715_PCI_SLOT_COUNT]
62			[GTWX5715_PCI_INT_PIN_COUNT] = {
63	{GTWX5715_PCI_SLOT0_INTA_IRQ, GTWX5715_PCI_SLOT0_INTB_IRQ},
64	{GTWX5715_PCI_SLOT1_INTA_IRQ, GTWX5715_PCI_SLOT1_INTB_IRQ},
65};
66
67	if (slot >= GTWX5715_PCI_SLOT_COUNT ||
68			pin >= GTWX5715_PCI_INT_PIN_COUNT) rc = -1;
69	else
70		rc = gtwx5715_irqmap[slot][pin-1];
71
72	printk("%s: Mapped slot %d pin %d to IRQ %d\n", __FUNCTION__,slot, pin, rc);
73	return(rc);
74}
75
76struct hw_pci gtwx5715_pci __initdata = {
77	.nr_controllers = 1,
78	.preinit =        gtwx5715_pci_preinit,
79	.swizzle =        pci_std_swizzle,
80	.setup =          ixp4xx_setup,
81	.scan =           ixp4xx_scan_bus,
82	.map_irq =        gtwx5715_map_irq,
83};
84
85int __init gtwx5715_pci_init(void)
86{
87	if (machine_is_gtwx5715())
88	{
89		pci_common_init(&gtwx5715_pci);
90	}
91
92	return 0;
93}
94
95subsys_initcall(gtwx5715_pci_init);
96