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}