blob: 9a02f28ed05f5519ea6433bad4d9cde6edfd4670 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * File: portdrv_bus.c
3 * Purpose: PCI Express Port Bus Driver's Bus Overloading Functions
4 *
5 * Copyright (C) 2004 Intel
6 * Copyright (C) Tom Long Nguyen (tom.l.nguyen@intel.com)
7 */
8
9#include <linux/module.h>
10#include <linux/pci.h>
11#include <linux/kernel.h>
12#include <linux/errno.h>
13#include <linux/pm.h>
14
15#include <linux/pcieport_if.h>
16
17static int pcie_port_bus_match(struct device *dev, struct device_driver *drv);
18static int pcie_port_bus_suspend(struct device *dev, u32 state);
19static int pcie_port_bus_resume(struct device *dev);
20
21struct bus_type pcie_port_bus_type = {
22 .name = "pci_express",
23 .match = pcie_port_bus_match,
24 .suspend = pcie_port_bus_suspend,
25 .resume = pcie_port_bus_resume,
26};
27
28static int pcie_port_bus_match(struct device *dev, struct device_driver *drv)
29{
30 struct pcie_device *pciedev;
31 struct pcie_port_service_driver *driver;
32
33 if (drv->bus != &pcie_port_bus_type || dev->bus != &pcie_port_bus_type)
34 return 0;
35
36 pciedev = to_pcie_device(dev);
37 driver = to_service_driver(drv);
38 if ( (driver->id_table->vendor != PCI_ANY_ID &&
39 driver->id_table->vendor != pciedev->id.vendor) ||
40 (driver->id_table->device != PCI_ANY_ID &&
41 driver->id_table->device != pciedev->id.device) ||
42 driver->id_table->port_type != pciedev->id.port_type ||
43 driver->id_table->service_type != pciedev->id.service_type )
44 return 0;
45
46 return 1;
47}
48
49static int pcie_port_bus_suspend(struct device *dev, u32 state)
50{
51 struct pcie_device *pciedev;
52 struct pcie_port_service_driver *driver;
53
54 if (!dev || !dev->driver)
55 return 0;
56
57 pciedev = to_pcie_device(dev);
58 driver = to_service_driver(dev->driver);
59 if (driver && driver->suspend)
60 driver->suspend(pciedev, state);
61 return 0;
62}
63
64static int pcie_port_bus_resume(struct device *dev)
65{
66 struct pcie_device *pciedev;
67 struct pcie_port_service_driver *driver;
68
69 if (!dev || !dev->driver)
70 return 0;
71
72 pciedev = to_pcie_device(dev);
73 driver = to_service_driver(dev->driver);
74 if (driver && driver->resume)
75 driver->resume(pciedev);
76 return 0;
77}