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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 | ||
14 | #include <linux/pci.h> | |
1014c22e | 15 | #include <linux/export.h> |
5a0e3ad6 | 16 | #include <linux/slab.h> |
61e115a5 MB |
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 | { | |
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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; | |
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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 | { | |
8fe2b65a | 38 | struct ssb_bus *ssb = pci_get_drvdata(dev); |
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39 | int err; |
40 | ||
d36a21da | 41 | pci_set_power_state(dev, PCI_D0); |
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42 | err = pci_enable_device(dev); |
43 | if (err) | |
44 | return err; | |
45 | pci_restore_state(dev); | |
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46 | err = ssb_bus_resume(ssb); |
47 | if (err) | |
48 | return err; | |
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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 | ||
163247c1 GKH |
57 | static int ssb_pcihost_probe(struct pci_dev *dev, |
58 | const struct pci_device_id *id) | |
61e115a5 MB |
59 | { |
60 | struct ssb_bus *ssb; | |
61 | int err = -ENOMEM; | |
62 | const char *name; | |
e081685c | 63 | u32 val; |
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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; | |
b7b05fe7 | 71 | name = dev_name(&dev->dev); |
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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 | ||
e081685c LF |
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 | ||
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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 | ||
163247c1 | 114 | int ssb_pcihost_register(struct pci_driver *driver) |
61e115a5 MB |
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); |