2 * pci_bind.c - ACPI PCI Device Binding ($Revision: 2 $)
4 * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
5 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.
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.
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.
23 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
26 #include <linux/kernel.h>
27 #include <linux/types.h>
28 #include <linux/pci.h>
29 #include <linux/acpi.h>
30 #include <acpi/acpi_bus.h>
31 #include <acpi/acpi_drivers.h>
33 #define _COMPONENT ACPI_PCI_COMPONENT
34 ACPI_MODULE_NAME("pci_bind");
36 struct acpi_pci_data {
37 struct acpi_pci_id id;
42 static int acpi_pci_bind(struct acpi_device *device);
43 static int acpi_pci_unbind(struct acpi_device *device);
45 static void acpi_pci_data_handler(acpi_handle handle, u32 function,
49 /* TBD: Anything we need to do here? */
57 * This function is used by the ACPI Interpreter (a.k.a. Core Subsystem)
58 * to resolve PCI information for ACPI-PCI devices defined in the namespace.
59 * This typically occurs when resolving PCI operation region information.
61 acpi_status acpi_get_pci_id(acpi_handle handle, struct acpi_pci_id *id)
64 acpi_status status = AE_OK;
65 struct acpi_device *device = NULL;
66 struct acpi_pci_data *data = NULL;
70 return AE_BAD_PARAMETER;
72 result = acpi_bus_get_device(handle, &device);
74 printk(KERN_ERR PREFIX
75 "Invalid ACPI Bus context for device %s\n",
76 acpi_device_bid(device));
80 status = acpi_get_data(handle, acpi_pci_data_handler, (void **)&data);
81 if (ACPI_FAILURE(status) || !data) {
82 ACPI_EXCEPTION((AE_INFO, status,
83 "Invalid ACPI-PCI context for device %s",
84 acpi_device_bid(device)));
91 id->segment = data->id.segment;
92 id->bus = data->id.bus;
93 id->device = data->id.device;
94 id->function = data->id.function;
97 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
98 "Device %s has PCI address %04x:%02x:%02x.%d\n",
99 acpi_device_bid(device), id->segment, id->bus,
100 id->device, id->function));
105 EXPORT_SYMBOL(acpi_get_pci_id);
107 static int acpi_pci_unbind(struct acpi_device *device)
111 dev = acpi_get_pci_dev(device->handle);
112 if (!dev || !dev->subordinate)
115 acpi_pci_irq_del_prt(dev->subordinate);
117 device->ops.bind = NULL;
118 device->ops.unbind = NULL;
125 static int acpi_pci_bind(struct acpi_device *device)
132 dev = acpi_get_pci_dev(device->handle);
137 * Install the 'bind' function to facilitate callbacks for
138 * children of the P2P bridge.
140 if (dev->subordinate) {
141 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
142 "Device %04x:%02x:%02x.%d is a PCI bridge\n",
143 pci_domain_nr(dev->bus), dev->bus->number,
144 PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn)));
145 device->ops.bind = acpi_pci_bind;
146 device->ops.unbind = acpi_pci_unbind;
150 * Evaluate and parse _PRT, if exists. This code allows parsing of
151 * _PRT objects within the scope of non-bridge devices. Note that
152 * _PRTs within the scope of a PCI bridge assume the bridge's
153 * subordinate bus number.
155 * TBD: Can _PRTs exist within the scope of non-bridge PCI devices?
157 status = acpi_get_handle(device->handle, METHOD_NAME__PRT, &handle);
158 if (ACPI_FAILURE(status))
161 if (dev->subordinate)
162 bus = dev->subordinate;
166 acpi_pci_irq_add_prt(device->handle, bus);
173 int acpi_pci_bind_root(struct acpi_device *device)
175 device->ops.bind = acpi_pci_bind;
176 device->ops.unbind = acpi_pci_unbind;