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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> | |
9 | * Copyright (c) 2005-2007 Michael Buesch <mbuesch@freenet.de> | |
10 | * | |
11 | * Licensed under the GNU/GPL. See COPYING for details. | |
12 | */ | |
13 | ||
14 | #include <linux/pci.h> | |
5a0e3ad6 | 15 | #include <linux/slab.h> |
61e115a5 MB |
16 | #include <linux/ssb/ssb.h> |
17 | ||
18 | ||
19 | #ifdef CONFIG_PM | |
20 | static int ssb_pcihost_suspend(struct pci_dev *dev, pm_message_t state) | |
21 | { | |
8fe2b65a MB |
22 | struct ssb_bus *ssb = pci_get_drvdata(dev); |
23 | int err; | |
24 | ||
25 | err = ssb_bus_suspend(ssb); | |
26 | if (err) | |
27 | return err; | |
61e115a5 MB |
28 | pci_save_state(dev); |
29 | pci_disable_device(dev); | |
30 | pci_set_power_state(dev, pci_choose_state(dev, state)); | |
31 | ||
32 | return 0; | |
33 | } | |
34 | ||
35 | static int ssb_pcihost_resume(struct pci_dev *dev) | |
36 | { | |
8fe2b65a | 37 | struct ssb_bus *ssb = pci_get_drvdata(dev); |
61e115a5 MB |
38 | int err; |
39 | ||
40 | pci_set_power_state(dev, 0); | |
41 | err = pci_enable_device(dev); | |
42 | if (err) | |
43 | return err; | |
44 | pci_restore_state(dev); | |
8fe2b65a MB |
45 | err = ssb_bus_resume(ssb); |
46 | if (err) | |
47 | return err; | |
61e115a5 MB |
48 | |
49 | return 0; | |
50 | } | |
51 | #else /* CONFIG_PM */ | |
52 | # define ssb_pcihost_suspend NULL | |
53 | # define ssb_pcihost_resume NULL | |
54 | #endif /* CONFIG_PM */ | |
55 | ||
56 | static int ssb_pcihost_probe(struct pci_dev *dev, | |
57 | const struct pci_device_id *id) | |
58 | { | |
59 | struct ssb_bus *ssb; | |
60 | int err = -ENOMEM; | |
61 | const char *name; | |
e081685c | 62 | u32 val; |
61e115a5 MB |
63 | |
64 | ssb = kzalloc(sizeof(*ssb), GFP_KERNEL); | |
65 | if (!ssb) | |
66 | goto out; | |
67 | err = pci_enable_device(dev); | |
68 | if (err) | |
69 | goto err_kfree_ssb; | |
b7b05fe7 | 70 | name = dev_name(&dev->dev); |
61e115a5 MB |
71 | if (dev->driver && dev->driver->name) |
72 | name = dev->driver->name; | |
73 | err = pci_request_regions(dev, name); | |
74 | if (err) | |
75 | goto err_pci_disable; | |
76 | pci_set_master(dev); | |
77 | ||
e081685c LF |
78 | /* Disable the RETRY_TIMEOUT register (0x41) to keep |
79 | * PCI Tx retries from interfering with C3 CPU state */ | |
80 | pci_read_config_dword(dev, 0x40, &val); | |
81 | if ((val & 0x0000ff00) != 0) | |
82 | pci_write_config_dword(dev, 0x40, val & 0xffff00ff); | |
83 | ||
61e115a5 MB |
84 | err = ssb_bus_pcibus_register(ssb, dev); |
85 | if (err) | |
86 | goto err_pci_release_regions; | |
87 | ||
88 | pci_set_drvdata(dev, ssb); | |
89 | ||
90 | out: | |
91 | return err; | |
92 | ||
93 | err_pci_release_regions: | |
94 | pci_release_regions(dev); | |
95 | err_pci_disable: | |
96 | pci_disable_device(dev); | |
97 | err_kfree_ssb: | |
98 | kfree(ssb); | |
99 | return err; | |
100 | } | |
101 | ||
102 | static void ssb_pcihost_remove(struct pci_dev *dev) | |
103 | { | |
104 | struct ssb_bus *ssb = pci_get_drvdata(dev); | |
105 | ||
106 | ssb_bus_unregister(ssb); | |
107 | pci_release_regions(dev); | |
108 | pci_disable_device(dev); | |
109 | kfree(ssb); | |
110 | pci_set_drvdata(dev, NULL); | |
111 | } | |
112 | ||
113 | int ssb_pcihost_register(struct pci_driver *driver) | |
114 | { | |
115 | driver->probe = ssb_pcihost_probe; | |
116 | driver->remove = ssb_pcihost_remove; | |
117 | driver->suspend = ssb_pcihost_suspend; | |
118 | driver->resume = ssb_pcihost_resume; | |
119 | ||
120 | return pci_register_driver(driver); | |
121 | } | |
122 | EXPORT_SYMBOL(ssb_pcihost_register); |