blob: ba587523c015e7755b5e670ec62c96586ead264c [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* pci-irq.c: PCI IRQ routing on the FRV motherboard
2 *
3 * Copyright (C) 2003 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
5 * derived from: arch/i386/kernel/pci-irq.c: (c) 1999--2000 Martin Mares <mj@suse.cz>
6 */
7
Linus Torvalds1da177e2005-04-16 15:20:36 -07008#include <linux/types.h>
9#include <linux/kernel.h>
10#include <linux/pci.h>
11#include <linux/init.h>
12#include <linux/slab.h>
13#include <linux/interrupt.h>
14#include <linux/irq.h>
15
16#include <asm/io.h>
17#include <asm/smp.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070018
19#include "pci-frv.h"
20
21/*
22 * DEVICE DEVNO INT#A INT#B INT#C INT#D
23 * ======= ======= ======= ======= ======= =======
24 * MB86943 0 fpga.10 - - -
25 * RTL8029 16 fpga.12 - - -
26 * SLOT 1 19 fpga.6 fpga.5 fpga.4 fpga.3
27 * SLOT 2 18 fpga.5 fpga.4 fpga.3 fpga.6
28 * SLOT 3 17 fpga.4 fpga.3 fpga.6 fpga.5
29 *
30 */
31
32static const uint8_t __initdata pci_bus0_irq_routing[32][4] = {
Al Viro576132b2006-06-23 02:04:07 -070033 [0 ] = { IRQ_FPGA_MB86943_PCI_INTA },
34 [16] = { IRQ_FPGA_RTL8029_INTA },
35 [17] = { IRQ_FPGA_PCI_INTC, IRQ_FPGA_PCI_INTD, IRQ_FPGA_PCI_INTA, IRQ_FPGA_PCI_INTB },
36 [18] = { IRQ_FPGA_PCI_INTB, IRQ_FPGA_PCI_INTC, IRQ_FPGA_PCI_INTD, IRQ_FPGA_PCI_INTA },
37 [19] = { IRQ_FPGA_PCI_INTA, IRQ_FPGA_PCI_INTB, IRQ_FPGA_PCI_INTC, IRQ_FPGA_PCI_INTD },
Linus Torvalds1da177e2005-04-16 15:20:36 -070038};
39
40void __init pcibios_irq_init(void)
41{
42}
43
44void __init pcibios_fixup_irqs(void)
45{
46 struct pci_dev *dev = NULL;
47 uint8_t line, pin;
48
Jiri Slaby3c947922005-11-06 23:39:33 -080049 for_each_pci_dev(dev) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070050 pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
51 if (pin) {
52 dev->irq = pci_bus0_irq_routing[PCI_SLOT(dev->devfn)][pin - 1];
53 pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq);
54 }
55 pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &line);
56 }
57}
58
David Howells8080f232005-11-28 13:43:51 -080059void __init pcibios_penalize_isa_irq(int irq)
Linus Torvalds1da177e2005-04-16 15:20:36 -070060{
61}
62
63void pcibios_enable_irq(struct pci_dev *dev)
64{
65 pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq);
66}