Add linux-next specific files for 20110831
[linux-2.6/next.git] / drivers / ssb / pcihost_wrapper.c
blobaf5448f5e2d2242b86fff652fe58c0f8d3219b67
1 /*
2 * Sonics Silicon Backplane
3 * PCI Hostdevice wrapper
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>
11 * Licensed under the GNU/GPL. See COPYING for details.
14 #include <linux/pci.h>
15 #include <linux/export.h>
16 #include <linux/slab.h>
17 #include <linux/ssb/ssb.h>
20 #ifdef CONFIG_PM
21 static int ssb_pcihost_suspend(struct pci_dev *dev, pm_message_t state)
23 struct ssb_bus *ssb = pci_get_drvdata(dev);
24 int err;
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));
33 return 0;
36 static int ssb_pcihost_resume(struct pci_dev *dev)
38 struct ssb_bus *ssb = pci_get_drvdata(dev);
39 int err;
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;
50 return 0;
52 #else /* CONFIG_PM */
53 # define ssb_pcihost_suspend NULL
54 # define ssb_pcihost_resume NULL
55 #endif /* CONFIG_PM */
57 static int __devinit ssb_pcihost_probe(struct pci_dev *dev,
58 const struct pci_device_id *id)
60 struct ssb_bus *ssb;
61 int err = -ENOMEM;
62 const char *name;
63 u32 val;
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);
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);
85 err = ssb_bus_pcibus_register(ssb, dev);
86 if (err)
87 goto err_pci_release_regions;
89 pci_set_drvdata(dev, ssb);
91 out:
92 return err;
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;
103 static void ssb_pcihost_remove(struct pci_dev *dev)
105 struct ssb_bus *ssb = pci_get_drvdata(dev);
107 ssb_bus_unregister(ssb);
108 pci_release_regions(dev);
109 pci_disable_device(dev);
110 kfree(ssb);
111 pci_set_drvdata(dev, NULL);
114 int __devinit ssb_pcihost_register(struct pci_driver *driver)
116 driver->probe = ssb_pcihost_probe;
117 driver->remove = ssb_pcihost_remove;
118 driver->suspend = ssb_pcihost_suspend;
119 driver->resume = ssb_pcihost_resume;
121 return pci_register_driver(driver);
123 EXPORT_SYMBOL(ssb_pcihost_register);