/* pci-irq.c: PCI IRQ routing on the FRV motherboard * * Copyright (C) 2003 Red Hat, Inc. All Rights Reserved. * Written by David Howells (dhowells@redhat.com) * derived from: arch/i386/kernel/pci-irq.c: (c) 1999--2000 Martin Mares <mj@suse.cz> */ #include <linux/config.h> #include <linux/types.h> #include <linux/kernel.h> #include <linux/pci.h> #include <linux/init.h> #include <linux/slab.h> #include <linux/interrupt.h> #include <linux/irq.h> #include <asm/io.h> #include <asm/smp.h> #include <asm/irq-routing.h> #include "pci-frv.h" /* * DEVICE DEVNO INT#A INT#B INT#C INT#D * ======= ======= ======= ======= ======= ======= * MB86943 0 fpga.10 - - - * RTL8029 16 fpga.12 - - - * SLOT 1 19 fpga.6 fpga.5 fpga.4 fpga.3 * SLOT 2 18 fpga.5 fpga.4 fpga.3 fpga.6 * SLOT 3 17 fpga.4 fpga.3 fpga.6 fpga.5 * */ static const uint8_t __initdata pci_bus0_irq_routing[32][4] = { [0 ] { IRQ_FPGA_MB86943_PCI_INTA }, [16] { IRQ_FPGA_RTL8029_INTA }, [17] { IRQ_FPGA_PCI_INTC, IRQ_FPGA_PCI_INTD, IRQ_FPGA_PCI_INTA, IRQ_FPGA_PCI_INTB }, [18] { IRQ_FPGA_PCI_INTB, IRQ_FPGA_PCI_INTC, IRQ_FPGA_PCI_INTD, IRQ_FPGA_PCI_INTA }, [19] { IRQ_FPGA_PCI_INTA, IRQ_FPGA_PCI_INTB, IRQ_FPGA_PCI_INTC, IRQ_FPGA_PCI_INTD }, }; void __init pcibios_irq_init(void) { } void __init pcibios_fixup_irqs(void) { struct pci_dev *dev = NULL; uint8_t line, pin; while (dev = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, dev), dev != NULL ) { pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin); if (pin) { dev->irq = pci_bus0_irq_routing[PCI_SLOT(dev->devfn)][pin - 1]; pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq); } pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &line); } } void __init pcibios_penalize_isa_irq(int irq, int active) { } void pcibios_enable_irq(struct pci_dev *dev) { pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq); }