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/hardware/dec21285.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(struct pci_dev *dev, u8 slot, u8 pin)
22{
23	unsigned char line;
24
25	pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &line);
26
27	if (line > 0x40 && line <= 0x5f) {
28		/* line corresponds to the bit controlling this interrupt
29		 * in the footbridge.  Ignore the first 8 interrupt bits,
30		 * look up the rest in the map.  IN0 is bit number 8
31		 */
32		return irqmap_personal_server[(line & 0x1f) - 8];
33	} else if (line == 0) {
34		/* no interrupt */
35		return 0;
36	} else
37		return irqmap_personal_server[(line - 1) & 3];
38}
39
40struct hw_pci personal_server_pci __initdata = {
41	setup_resources:	dc21285_setup_resources,
42	init:			dc21285_init,
43	mem_offset:		DC21285_PCI_MEM,
44	swizzle:		no_swizzle,
45	map_irq:		personal_server_map_irq,
46};
47