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1da177e4 LT |
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 | ||
34 | extern void ixp4xx_pci_preinit(void); | |
35 | extern int ixp4xx_setup(int nr, struct pci_sys_data *sys); | |
36 | extern struct pci_bus *ixp4xx_scan_bus(int nr, struct pci_sys_data *sys); | |
37 | ||
1da177e4 | 38 | |
bdf82b59 DS |
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 | */ | |
1da177e4 LT |
46 | void __init gtwx5715_pci_preinit(void) |
47 | { | |
bdf82b59 DS |
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); | |
1da177e4 LT |
52 | |
53 | ixp4xx_pci_preinit(); | |
54 | } | |
55 | ||
56 | ||
57 | static 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 | ||
76 | struct 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 | ||
85 | int __init gtwx5715_pci_init(void) | |
86 | { | |
87 | if (machine_is_gtwx5715()) | |
88 | { | |
89 | pci_common_init(>wx5715_pci); | |
90 | } | |
91 | ||
92 | return 0; | |
93 | } | |
94 | ||
95 | subsys_initcall(gtwx5715_pci_init); |