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

https://github.com/AICP/kernel_google_msm
C | 85 lines | 45 code | 11 blank | 29 comment | 16 complexity | 11cd58ff4f4e5afa5ee7e91787b1d636 MD5 | raw file
 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 <linux/irq.h>
29#include <asm/mach-types.h>
30#include <mach/hardware.h>
31#include <asm/mach/pci.h>
32
33#define SLOT0_DEVID	0
34#define SLOT1_DEVID	1
35#define INTA		10 /* slot 1 has INTA and INTB crossed */
36#define INTB		11
37
38/*
39 * Slot 0 isn't actually populated with a card connector but
40 * we initialize it anyway in case a future version has the
41 * slot populated or someone with good soldering skills has
42 * some free time.
43 */
44void __init gtwx5715_pci_preinit(void)
45{
46	irq_set_irq_type(IXP4XX_GPIO_IRQ(INTA), IRQ_TYPE_LEVEL_LOW);
47	irq_set_irq_type(IXP4XX_GPIO_IRQ(INTB), IRQ_TYPE_LEVEL_LOW);
48	ixp4xx_pci_preinit();
49}
50
51
52static int __init gtwx5715_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
53{
54	int rc = -1;
55
56	if ((slot == SLOT0_DEVID && pin == 1) ||
57	    (slot == SLOT1_DEVID && pin == 2))
58		rc = IXP4XX_GPIO_IRQ(INTA);
59	else if ((slot == SLOT0_DEVID && pin == 2) ||
60		 (slot == SLOT1_DEVID && pin == 1))
61		rc = IXP4XX_GPIO_IRQ(INTB);
62
63	printk(KERN_INFO "%s: Mapped slot %d pin %d to IRQ %d\n",
64	       __func__, slot, pin, rc);
65	return rc;
66}
67
68struct hw_pci gtwx5715_pci __initdata = {
69	.nr_controllers = 1,
70	.preinit =        gtwx5715_pci_preinit,
71	.swizzle =        pci_std_swizzle,
72	.setup =          ixp4xx_setup,
73	.scan =           ixp4xx_scan_bus,
74	.map_irq =        gtwx5715_map_irq,
75};
76
77int __init gtwx5715_pci_init(void)
78{
79	if (machine_is_gtwx5715())
80		pci_common_init(&gtwx5715_pci);
81
82	return 0;
83}
84
85subsys_initcall(gtwx5715_pci_init);