1/*
2 * linux/arch/arm/mach-footbridge/personal-pci.c
3 *
4 * PCI bios-type initialisation for PCI machines
5 *
6 * Bits taken from various places.
7 */
8#include <linux/kernel.h>
9#include <linux/pci.h>
10#include <linux/init.h>
11
12#include <asm/irq.h>
13#include <asm/mach/pci.h>
14#include <asm/mach-types.h>
15
16static int irqmap_personal_server[] __initdata = {
17	IRQ_IN0, IRQ_IN1, IRQ_IN2, IRQ_IN3, 0, 0, 0,
18	IRQ_DOORBELLHOST, IRQ_DMA1, IRQ_DMA2, IRQ_PCI
19};
20
21static int __init personal_server_map_irq(const struct pci_dev *dev, u8 slot,
22	u8 pin)
23{
24	unsigned char line;
25
26	pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &line);
27
28	if (line > 0x40 && line <= 0x5f) {
29		/* line corresponds to the bit controlling this interrupt
30		 * in the footbridge.  Ignore the first 8 interrupt bits,
31		 * look up the rest in the map.  IN0 is bit number 8
32		 */
33		return irqmap_personal_server[(line & 0x1f) - 8];
34	} else if (line == 0) {
35		/* no interrupt */
36		return 0;
37	} else
38		return irqmap_personal_server[(line - 1) & 3];
39}
40
41static struct hw_pci personal_server_pci __initdata = {
42	.map_irq		= personal_server_map_irq,
43	.nr_controllers		= 1,
44	.ops			= &dc21285_ops,
45	.setup			= dc21285_setup,
46	.preinit		= dc21285_preinit,
47	.postinit		= dc21285_postinit,
48};
49
50static int __init personal_pci_init(void)
51{
52	if (machine_is_personal_server())
53		pci_common_init(&personal_server_pci);
54	return 0;
55}
56
57subsys_initcall(personal_pci_init);
58