/* * pci_bind.c - ACPI PCI Device Binding ($Revision: 2 $) * * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> * * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or (at * your option) any later version. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. * * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */ #include <linux/kernel.h> #include <linux/types.h> #include <linux/pci.h> #include <linux/acpi.h> #include <acpi/acpi_bus.h> #include <acpi/acpi_drivers.h> #define _COMPONENT ACPI_PCI_COMPONENT ACPI_MODULE_NAME("pci_bind"); static int acpi_pci_unbind(struct acpi_device *device) { struct pci_dev *dev; dev = acpi_get_pci_dev(device->handle); if (!dev || !dev->subordinate) goto out; acpi_pci_irq_del_prt(dev->subordinate); device->ops.bind = NULL; device->ops.unbind = NULL; out: pci_dev_put(dev); return 0; } static int acpi_pci_bind(struct acpi_device *device) { acpi_status status; acpi_handle handle; struct pci_bus *bus; struct pci_dev *dev; dev = acpi_get_pci_dev(device->handle); if (!dev) return 0; /* * Install the 'bind' function to facilitate callbacks for * children of the P2P bridge. */ if (dev->subordinate) { ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device %04x:%02x:%02x.%d is a PCI bridge\n", pci_domain_nr(dev->bus), dev->bus->number, PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn))); device->ops.bind = acpi_pci_bind; device->ops.unbind = acpi_pci_unbind; } /* * Evaluate and parse _PRT, if exists. This code allows parsing of * _PRT objects within the scope of non-bridge devices. Note that * _PRTs within the scope of a PCI bridge assume the bridge's * subordinate bus number. * * TBD: Can _PRTs exist within the scope of non-bridge PCI devices? */ status = acpi_get_handle(device->handle, METHOD_NAME__PRT, &handle); if (ACPI_FAILURE(status)) goto out; if (dev->subordinate) bus = dev->subordinate; else bus = dev->bus; acpi_pci_irq_add_prt(device->handle, bus); out: pci_dev_put(dev); return 0; } int acpi_pci_bind_root(struct acpi_device *device) { device->ops.bind = acpi_pci_bind; device->ops.unbind = acpi_pci_unbind; return 0; }