ssb: Add export.h to files using EXPORT_SYMBOL/THIS_MODULE
[linux-2.6.git] / drivers / ssb / pcihost_wrapper.c
1 /*
2  * Sonics Silicon Backplane
3  * PCI Hostdevice wrapper
4  *
5  * Copyright (c) 2005 Martin Langer <martin-langer@gmx.de>
6  * Copyright (c) 2005 Stefano Brivio <st3@riseup.net>
7  * Copyright (c) 2005 Danny van Dyk <kugelfang@gentoo.org>
8  * Copyright (c) 2005 Andreas Jaggi <andreas.jaggi@waterwave.ch>
9  * Copyright (c) 2005-2007 Michael Buesch <m@bues.ch>
10  *
11  * Licensed under the GNU/GPL. See COPYING for details.
12  */
13
14 #include <linux/pci.h>
15 #include <linux/export.h>
16 #include <linux/slab.h>
17 #include <linux/ssb/ssb.h>
18
19
20 #ifdef CONFIG_PM
21 static int ssb_pcihost_suspend(struct pci_dev *dev, pm_message_t state)
22 {
23         struct ssb_bus *ssb = pci_get_drvdata(dev);
24         int err;
25
26         err = ssb_bus_suspend(ssb);
27         if (err)
28                 return err;
29         pci_save_state(dev);
30         pci_disable_device(dev);
31         pci_set_power_state(dev, pci_choose_state(dev, state));
32
33         return 0;
34 }
35
36 static int ssb_pcihost_resume(struct pci_dev *dev)
37 {
38         struct ssb_bus *ssb = pci_get_drvdata(dev);
39         int err;
40
41         pci_set_power_state(dev, 0);
42         err = pci_enable_device(dev);
43         if (err)
44                 return err;
45         pci_restore_state(dev);
46         err = ssb_bus_resume(ssb);
47         if (err)
48                 return err;
49
50         return 0;
51 }
52 #else /* CONFIG_PM */
53 # define ssb_pcihost_suspend    NULL
54 # define ssb_pcihost_resume     NULL
55 #endif /* CONFIG_PM */
56
57 static int __devinit ssb_pcihost_probe(struct pci_dev *dev,
58                                        const struct pci_device_id *id)
59 {
60         struct ssb_bus *ssb;
61         int err = -ENOMEM;
62         const char *name;
63         u32 val;
64
65         ssb = kzalloc(sizeof(*ssb), GFP_KERNEL);
66         if (!ssb)
67                 goto out;
68         err = pci_enable_device(dev);
69         if (err)
70                 goto err_kfree_ssb;
71         name = dev_name(&dev->dev);
72         if (dev->driver && dev->driver->name)
73                 name = dev->driver->name;
74         err = pci_request_regions(dev, name);
75         if (err)
76                 goto err_pci_disable;
77         pci_set_master(dev);
78
79         /* Disable the RETRY_TIMEOUT register (0x41) to keep
80          * PCI Tx retries from interfering with C3 CPU state */
81         pci_read_config_dword(dev, 0x40, &val);
82         if ((val & 0x0000ff00) != 0)
83                 pci_write_config_dword(dev, 0x40, val & 0xffff00ff);
84
85         err = ssb_bus_pcibus_register(ssb, dev);
86         if (err)
87                 goto err_pci_release_regions;
88
89         pci_set_drvdata(dev, ssb);
90
91 out:
92         return err;
93
94 err_pci_release_regions:
95         pci_release_regions(dev);
96 err_pci_disable:
97         pci_disable_device(dev);
98 err_kfree_ssb:
99         kfree(ssb);
100         return err;
101 }
102
103 static void ssb_pcihost_remove(struct pci_dev *dev)
104 {
105         struct ssb_bus *ssb = pci_get_drvdata(dev);
106
107         ssb_bus_unregister(ssb);
108         pci_release_regions(dev);
109         pci_disable_device(dev);
110         kfree(ssb);
111         pci_set_drvdata(dev, NULL);
112 }
113
114 int __devinit ssb_pcihost_register(struct pci_driver *driver)
115 {
116         driver->probe = ssb_pcihost_probe;
117         driver->remove = ssb_pcihost_remove;
118         driver->suspend = ssb_pcihost_suspend;
119         driver->resume = ssb_pcihost_resume;
120
121         return pci_register_driver(driver);
122 }
123 EXPORT_SYMBOL(ssb_pcihost_register);