blob: 0d5a42455820322c804d046233e7563826d66106 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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>
Michael-Luke Jonesddaca4a2007-05-31 12:27:14 +010028#include <linux/irq.h>
29
Linus Torvalds1da177e2005-04-16 15:20:36 -070030#include <asm/mach-types.h>
31#include <asm/hardware.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070032#include <asm/arch/gtwx5715.h>
33#include <asm/mach/pci.h>
34
Deepak Saxenabdf82b52005-08-29 22:46:30 +010035/*
36 * The exact GPIO pins and IRQs are defined in arch-ixp4xx/gtwx5715.h
37 * Slot 0 isn't actually populated with a card connector but
38 * we initialize it anyway in case a future version has the
39 * slot populated or someone with good soldering skills has
40 * some free time.
41 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070042void __init gtwx5715_pci_preinit(void)
43{
Deepak Saxenabdf82b52005-08-29 22:46:30 +010044 set_irq_type(GTWX5715_PCI_SLOT0_INTA_IRQ, IRQT_LOW);
45 set_irq_type(GTWX5715_PCI_SLOT0_INTB_IRQ, IRQT_LOW);
46 set_irq_type(GTWX5715_PCI_SLOT1_INTA_IRQ, IRQT_LOW);
47 set_irq_type(GTWX5715_PCI_SLOT1_INTB_IRQ, IRQT_LOW);
Linus Torvalds1da177e2005-04-16 15:20:36 -070048
49 ixp4xx_pci_preinit();
50}
51
52
53static int __init gtwx5715_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
54{
55 int rc;
56 static int gtwx5715_irqmap
57 [GTWX5715_PCI_SLOT_COUNT]
58 [GTWX5715_PCI_INT_PIN_COUNT] = {
59 {GTWX5715_PCI_SLOT0_INTA_IRQ, GTWX5715_PCI_SLOT0_INTB_IRQ},
60 {GTWX5715_PCI_SLOT1_INTA_IRQ, GTWX5715_PCI_SLOT1_INTB_IRQ},
61};
62
63 if (slot >= GTWX5715_PCI_SLOT_COUNT ||
64 pin >= GTWX5715_PCI_INT_PIN_COUNT) rc = -1;
65 else
66 rc = gtwx5715_irqmap[slot][pin-1];
67
68 printk("%s: Mapped slot %d pin %d to IRQ %d\n", __FUNCTION__,slot, pin, rc);
69 return(rc);
70}
71
72struct hw_pci gtwx5715_pci __initdata = {
73 .nr_controllers = 1,
74 .preinit = gtwx5715_pci_preinit,
75 .swizzle = pci_std_swizzle,
76 .setup = ixp4xx_setup,
77 .scan = ixp4xx_scan_bus,
78 .map_irq = gtwx5715_map_irq,
79};
80
81int __init gtwx5715_pci_init(void)
82{
83 if (machine_is_gtwx5715())
84 {
85 pci_common_init(&gtwx5715_pci);
86 }
87
88 return 0;
89}
90
91subsys_initcall(gtwx5715_pci_init);