1 /* pci-irq.c: PCI IRQ routing on the FRV motherboard
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>
8 #include <linux/config.h>
9 #include <linux/types.h>
10 #include <linux/kernel.h>
11 #include <linux/pci.h>
12 #include <linux/init.h>
13 #include <linux/slab.h>
14 #include <linux/interrupt.h>
15 #include <linux/irq.h>
19 #include <asm/irq-routing.h>
24 * DEVICE DEVNO INT#A INT#B INT#C INT#D
25 * ======= ======= ======= ======= ======= =======
26 * MB86943 0 fpga.10 - - -
27 * RTL8029 16 fpga.12 - - -
28 * SLOT 1 19 fpga.6 fpga.5 fpga.4 fpga.3
29 * SLOT 2 18 fpga.5 fpga.4 fpga.3 fpga.6
30 * SLOT 3 17 fpga.4 fpga.3 fpga.6 fpga.5
34 static const uint8_t __initdata pci_bus0_irq_routing[32][4] = {
35 [0 ] { IRQ_FPGA_MB86943_PCI_INTA },
36 [16] { IRQ_FPGA_RTL8029_INTA },
37 [17] { IRQ_FPGA_PCI_INTC, IRQ_FPGA_PCI_INTD, IRQ_FPGA_PCI_INTA, IRQ_FPGA_PCI_INTB },
38 [18] { IRQ_FPGA_PCI_INTB, IRQ_FPGA_PCI_INTC, IRQ_FPGA_PCI_INTD, IRQ_FPGA_PCI_INTA },
39 [19] { IRQ_FPGA_PCI_INTA, IRQ_FPGA_PCI_INTB, IRQ_FPGA_PCI_INTC, IRQ_FPGA_PCI_INTD },
42 void __init pcibios_irq_init(void)
46 void __init pcibios_fixup_irqs(void)
48 struct pci_dev *dev = NULL;
51 for_each_pci_dev(dev) {
52 pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
54 dev->irq = pci_bus0_irq_routing[PCI_SLOT(dev->devfn)][pin - 1];
55 pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq);
57 pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &line);
61 void __init pcibios_penalize_isa_irq(int irq)
65 void pcibios_enable_irq(struct pci_dev *dev)
67 pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq);