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61e115a5 MB |
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> | |
eb032b98 | 9 | * Copyright (c) 2005-2007 Michael Buesch <m@bues.ch> |
61e115a5 MB |
10 | * |
11 | * Licensed under the GNU/GPL. See COPYING for details. | |
12 | */ | |
13 | ||
5580373f | 14 | #include <linux/pm.h> |
61e115a5 | 15 | #include <linux/pci.h> |
1014c22e | 16 | #include <linux/export.h> |
5a0e3ad6 | 17 | #include <linux/slab.h> |
61e115a5 MB |
18 | #include <linux/ssb/ssb.h> |
19 | ||
20 | ||
5580373f AS |
21 | #ifdef CONFIG_PM_SLEEP |
22 | static int ssb_pcihost_suspend(struct device *d) | |
61e115a5 | 23 | { |
5580373f | 24 | struct pci_dev *dev = to_pci_dev(d); |
8fe2b65a MB |
25 | struct ssb_bus *ssb = pci_get_drvdata(dev); |
26 | int err; | |
27 | ||
28 | err = ssb_bus_suspend(ssb); | |
29 | if (err) | |
30 | return err; | |
61e115a5 MB |
31 | pci_save_state(dev); |
32 | pci_disable_device(dev); | |
5580373f AS |
33 | |
34 | /* if there is a wakeup enabled child device on ssb bus, | |
35 | enable pci wakeup posibility. */ | |
36 | device_set_wakeup_enable(d, d->power.wakeup_path); | |
37 | ||
38 | pci_prepare_to_sleep(dev); | |
61e115a5 MB |
39 | |
40 | return 0; | |
41 | } | |
42 | ||
5580373f | 43 | static int ssb_pcihost_resume(struct device *d) |
61e115a5 | 44 | { |
5580373f | 45 | struct pci_dev *dev = to_pci_dev(d); |
8fe2b65a | 46 | struct ssb_bus *ssb = pci_get_drvdata(dev); |
61e115a5 MB |
47 | int err; |
48 | ||
5580373f | 49 | pci_back_from_sleep(dev); |
61e115a5 MB |
50 | err = pci_enable_device(dev); |
51 | if (err) | |
52 | return err; | |
53 | pci_restore_state(dev); | |
8fe2b65a MB |
54 | err = ssb_bus_resume(ssb); |
55 | if (err) | |
56 | return err; | |
61e115a5 MB |
57 | |
58 | return 0; | |
59 | } | |
5580373f AS |
60 | |
61 | static const struct dev_pm_ops ssb_pcihost_pm_ops = { | |
62 | SET_SYSTEM_SLEEP_PM_OPS(ssb_pcihost_suspend, ssb_pcihost_resume) | |
63 | }; | |
64 | ||
65 | #endif /* CONFIG_PM_SLEEP */ | |
61e115a5 | 66 | |
163247c1 GKH |
67 | static int ssb_pcihost_probe(struct pci_dev *dev, |
68 | const struct pci_device_id *id) | |
61e115a5 MB |
69 | { |
70 | struct ssb_bus *ssb; | |
71 | int err = -ENOMEM; | |
e081685c | 72 | u32 val; |
61e115a5 MB |
73 | |
74 | ssb = kzalloc(sizeof(*ssb), GFP_KERNEL); | |
75 | if (!ssb) | |
76 | goto out; | |
77 | err = pci_enable_device(dev); | |
78 | if (err) | |
79 | goto err_kfree_ssb; | |
7c3b2c93 | 80 | err = pci_request_regions(dev, dev_driver_string(&dev->dev)); |
61e115a5 MB |
81 | if (err) |
82 | goto err_pci_disable; | |
83 | pci_set_master(dev); | |
84 | ||
e081685c LF |
85 | /* Disable the RETRY_TIMEOUT register (0x41) to keep |
86 | * PCI Tx retries from interfering with C3 CPU state */ | |
87 | pci_read_config_dword(dev, 0x40, &val); | |
88 | if ((val & 0x0000ff00) != 0) | |
89 | pci_write_config_dword(dev, 0x40, val & 0xffff00ff); | |
90 | ||
61e115a5 MB |
91 | err = ssb_bus_pcibus_register(ssb, dev); |
92 | if (err) | |
93 | goto err_pci_release_regions; | |
94 | ||
95 | pci_set_drvdata(dev, ssb); | |
96 | ||
97 | out: | |
98 | return err; | |
99 | ||
100 | err_pci_release_regions: | |
101 | pci_release_regions(dev); | |
102 | err_pci_disable: | |
103 | pci_disable_device(dev); | |
104 | err_kfree_ssb: | |
105 | kfree(ssb); | |
106 | return err; | |
107 | } | |
108 | ||
109 | static void ssb_pcihost_remove(struct pci_dev *dev) | |
110 | { | |
111 | struct ssb_bus *ssb = pci_get_drvdata(dev); | |
112 | ||
113 | ssb_bus_unregister(ssb); | |
114 | pci_release_regions(dev); | |
115 | pci_disable_device(dev); | |
116 | kfree(ssb); | |
117 | pci_set_drvdata(dev, NULL); | |
118 | } | |
119 | ||
163247c1 | 120 | int ssb_pcihost_register(struct pci_driver *driver) |
61e115a5 MB |
121 | { |
122 | driver->probe = ssb_pcihost_probe; | |
123 | driver->remove = ssb_pcihost_remove; | |
5580373f AS |
124 | #ifdef CONFIG_PM_SLEEP |
125 | driver->driver.pm = &ssb_pcihost_pm_ops; | |
126 | #endif | |
61e115a5 MB |
127 | |
128 | return pci_register_driver(driver); | |
129 | } | |
130 | EXPORT_SYMBOL(ssb_pcihost_register); |