| Kyle Swenson | 8d8f654 | 2021-03-15 11:02:55 -0600 | [diff] [blame^] | 1 | /* PCI IRQ routing on the MN103E010 based ASB2305 |
| 2 | * |
| 3 | * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. |
| 4 | * Written by David Howells (dhowells@redhat.com) |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public Licence |
| 8 | * as published by the Free Software Foundation; either version |
| 9 | * 2 of the Licence, or (at your option) any later version. |
| 10 | * |
| 11 | * This is simple: All PCI interrupts route through the CPU's XIRQ1 pin [IRQ 35] |
| 12 | */ |
| 13 | #include <linux/types.h> |
| 14 | #include <linux/kernel.h> |
| 15 | #include <linux/pci.h> |
| 16 | #include <linux/init.h> |
| 17 | #include <linux/interrupt.h> |
| 18 | #include <linux/irq.h> |
| 19 | #include <asm/io.h> |
| 20 | #include <asm/smp.h> |
| 21 | #include "pci-asb2305.h" |
| 22 | |
| 23 | void __init pcibios_irq_init(void) |
| 24 | { |
| 25 | } |
| 26 | |
| 27 | void __init pcibios_fixup_irqs(void) |
| 28 | { |
| 29 | struct pci_dev *dev = NULL; |
| 30 | u8 line, pin; |
| 31 | |
| 32 | for_each_pci_dev(dev) { |
| 33 | pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin); |
| 34 | if (pin) { |
| 35 | dev->irq = XIRQ1; |
| 36 | pci_write_config_byte(dev, PCI_INTERRUPT_LINE, |
| 37 | dev->irq); |
| 38 | } |
| 39 | pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &line); |
| 40 | } |
| 41 | } |
| 42 | |
| 43 | void pcibios_enable_irq(struct pci_dev *dev) |
| 44 | { |
| 45 | pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq); |
| 46 | } |