1/*
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, pm_message_t 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};
27EXPORT_SYMBOL_GPL(pcie_port_bus_type);
28
29static int pcie_port_bus_match(struct device *dev, struct device_driver *drv)
30{
31	struct pcie_device *pciedev;
32	struct pcie_port_service_driver *driver;
33
34	if (drv->bus != &pcie_port_bus_type || dev->bus != &pcie_port_bus_type)
35		return 0;
36
37	pciedev = to_pcie_device(dev);
38	driver = to_service_driver(drv);
39	if (   (driver->id_table->vendor != PCI_ANY_ID &&
40		driver->id_table->vendor != pciedev->id.vendor) ||
41	       (driver->id_table->device != PCI_ANY_ID &&
42		driver->id_table->device != pciedev->id.device) ||
43	       (driver->id_table->port_type != PCIE_ANY_PORT &&
44		driver->id_table->port_type != pciedev->id.port_type) ||
45		driver->id_table->service_type != pciedev->id.service_type )
46		return 0;
47
48	return 1;
49}
50
51static int pcie_port_bus_suspend(struct device *dev, pm_message_t state)
52{
53	struct pcie_device *pciedev;
54	struct pcie_port_service_driver *driver;
55
56	if (!dev || !dev->driver)
57		return 0;
58
59	pciedev = to_pcie_device(dev);
60 	driver = to_service_driver(dev->driver);
61	if (driver && driver->suspend)
62		driver->suspend(pciedev, state);
63	return 0;
64}
65
66static int pcie_port_bus_resume(struct device *dev)
67{
68	struct pcie_device *pciedev;
69	struct pcie_port_service_driver *driver;
70
71	if (!dev || !dev->driver)
72		return 0;
73
74	pciedev = to_pcie_device(dev);
75 	driver = to_service_driver(dev->driver);
76	if (driver && driver->resume)
77		driver->resume(pciedev);
78	return 0;
79}
80