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/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>
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
32 static const uint8_t __initdata pci_bus0_irq_routing[32][4] = {
33 [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 },
40 void __init pcibios_irq_init(void)
44 void __init pcibios_fixup_irqs(void)
46 struct pci_dev *dev = NULL;
49 for_each_pci_dev(dev) {
50 pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &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);
55 pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &line);
59 void __init pcibios_penalize_isa_irq(int irq)
63 void pcibios_enable_irq(struct pci_dev *dev)
65 pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq);