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 */
gtwx5715_pci_preinit(void)44 void __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
gtwx5715_map_irq(const struct pci_dev * dev,u8 slot,u8 pin)52 static 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
68 struct 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
gtwx5715_pci_init(void)77 int __init gtwx5715_pci_init(void)
78 {
79 if (machine_is_gtwx5715())
80 pci_common_init(>wx5715_pci);
81
82 return 0;
83 }
84
85 subsys_initcall(gtwx5715_pci_init);
86