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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 |
36 | ACPI_MODULE_NAME("pci_bind"); |
37 | |
38 | static 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 | |
57 | out: |
58 | pci_dev_put(dev); |
59 | return 0; |
60 | } |
61 | |
62 | static 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 | |
109 | out: |
110 | pci_dev_put(dev); |
111 | return 0; |
112 | } |
113 | |
114 | int 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 |
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