1/* 2 * pci_bind.c - ACPI PCI Device Binding ($Revision: 2 $) 3 * 4 * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> 5 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> 6 * 7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License as published by 11 * the Free Software Foundation; either version 2 of the License, or (at 12 * your option) any later version. 13 * 14 * This program is distributed in the hope that it will be useful, but 15 * WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 17 * General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License along 20 * with this program; if not, write to the Free Software Foundation, Inc., 21 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. 22 * 23 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 24 */ 25 26#include <linux/kernel.h> 27#include <linux/types.h> 28#include <linux/pci.h> 29#include <linux/pci-acpi.h> 30#include <linux/acpi.h> 31#include <linux/pm_runtime.h> 32#include <acpi/acpi_bus.h> 33#include <acpi/acpi_drivers.h> 34 35#define _COMPONENT ACPI_PCI_COMPONENT 36ACPI_MODULE_NAME("pci_bind"); 37 38static int acpi_pci_unbind(struct acpi_device *device) 39{ 40 struct pci_dev *dev; 41 42 dev = acpi_get_pci_dev(device->handle); 43 if (!dev) 44 goto out; 45 46 device_set_run_wake(&dev->dev, false); 47 pci_acpi_remove_pm_notifier(device); 48 49 if (!dev->subordinate) 50 goto out; 51 52 acpi_pci_irq_del_prt(dev->subordinate); 53 54 device->ops.bind = NULL; 55 device->ops.unbind = NULL; 56 57out: 58 pci_dev_put(dev); 59 return 0; 60} 61 62static int acpi_pci_bind(struct acpi_device *device) 63{ 64 acpi_status status; 65 acpi_handle handle; 66 struct pci_bus *bus; 67 struct pci_dev *dev; 68 69 dev = acpi_get_pci_dev(device->handle); 70 if (!dev) 71 return 0; 72 73 pci_acpi_add_pm_notifier(device, dev); 74 if (device->wakeup.flags.run_wake) 75 device_set_run_wake(&dev->dev, true); 76 77 /* 78 * Install the 'bind' function to facilitate callbacks for 79 * children of the P2P bridge. 80 */ 81 if (dev->subordinate) { 82 ACPI_DEBUG_PRINT((ACPI_DB_INFO, 83 "Device %04x:%02x:%02x.%d is a PCI bridge\n", 84 pci_domain_nr(dev->bus), dev->bus->number, 85 PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn))); 86 device->ops.bind = acpi_pci_bind; 87 device->ops.unbind = acpi_pci_unbind; 88 } 89 90 /* 91 * Evaluate and parse _PRT, if exists. This code allows parsing of 92 * _PRT objects within the scope of non-bridge devices. Note that 93 * _PRTs within the scope of a PCI bridge assume the bridge's 94 * subordinate bus number. 95 * 96 * TBD: Can _PRTs exist within the scope of non-bridge PCI devices? 97 */ 98 status = acpi_get_handle(device->handle, METHOD_NAME__PRT, &handle); 99 if (ACPI_FAILURE(status)) 100 goto out; 101 102 if (dev->subordinate) 103 bus = dev->subordinate; 104 else 105 bus = dev->bus; 106 107 acpi_pci_irq_add_prt(device->handle, bus); 108 109out: 110 pci_dev_put(dev); 111 return 0; 112} 113 114int acpi_pci_bind_root(struct acpi_device *device) 115{ 116 device->ops.bind = acpi_pci_bind; 117 device->ops.unbind = acpi_pci_unbind; 118 119 return 0; 120} 121