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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 <m@bues.ch>
10 *
11 * Licensed under the GNU/GPL. See COPYING for details.
12 */
13
14#include <linux/pm.h>
15#include <linux/pci.h>
16#include <linux/export.h>
17#include <linux/slab.h>
18#include <linux/ssb/ssb.h>
19
20
21#ifdef CONFIG_PM_SLEEP
22static int ssb_pcihost_suspend(struct device *d)
23{
24 struct pci_dev *dev = to_pci_dev(d);
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;
31 pci_save_state(dev);
32 pci_disable_device(dev);
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);
39
40 return 0;
41}
42
43static int ssb_pcihost_resume(struct device *d)
44{
45 struct pci_dev *dev = to_pci_dev(d);
46 struct ssb_bus *ssb = pci_get_drvdata(dev);
47 int err;
48
49 pci_back_from_sleep(dev);
50 err = pci_enable_device(dev);
51 if (err)
52 return err;
53 pci_restore_state(dev);
54 err = ssb_bus_resume(ssb);
55 if (err)
56 return err;
57
58 return 0;
59}
60
61static 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 */
66
67static int ssb_pcihost_probe(struct pci_dev *dev,
68 const struct pci_device_id *id)
69{
70 struct ssb_bus *ssb;
71 int err = -ENOMEM;
72 u32 val;
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;
80 err = pci_request_regions(dev, dev_driver_string(&dev->dev));
81 if (err)
82 goto err_pci_disable;
83 pci_set_master(dev);
84
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
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
97out:
98 return err;
99
100err_pci_release_regions:
101 pci_release_regions(dev);
102err_pci_disable:
103 pci_disable_device(dev);
104err_kfree_ssb:
105 kfree(ssb);
106 return err;
107}
108
109static 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
120int ssb_pcihost_register(struct pci_driver *driver)
121{
122 driver->probe = ssb_pcihost_probe;
123 driver->remove = ssb_pcihost_remove;
124#ifdef CONFIG_PM_SLEEP
125 driver->driver.pm = &ssb_pcihost_pm_ops;
126#endif
127
128 return pci_register_driver(driver);
129}
130EXPORT_SYMBOL(ssb_pcihost_register);
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/slab.h>
16#include <linux/ssb/ssb.h>
17
18
19#ifdef CONFIG_PM
20static int ssb_pcihost_suspend(struct pci_dev *dev, pm_message_t state)
21{
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;
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
35static int ssb_pcihost_resume(struct pci_dev *dev)
36{
37 struct ssb_bus *ssb = pci_get_drvdata(dev);
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);
45 err = ssb_bus_resume(ssb);
46 if (err)
47 return err;
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
56static int __devinit 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;
62 u32 val;
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;
70 name = dev_name(&dev->dev);
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
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
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
90out:
91 return err;
92
93err_pci_release_regions:
94 pci_release_regions(dev);
95err_pci_disable:
96 pci_disable_device(dev);
97err_kfree_ssb:
98 kfree(ssb);
99 return err;
100}
101
102static 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
113int __devinit 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}
122EXPORT_SYMBOL(ssb_pcihost_register);