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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/export.h>
16#include <linux/slab.h>
17#include <linux/ssb/ssb.h>
18
19
20#ifdef CONFIG_PM
21static int ssb_pcihost_suspend(struct pci_dev *dev, pm_message_t state)
22{
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;
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
36static int ssb_pcihost_resume(struct pci_dev *dev)
37{
38 struct ssb_bus *ssb = pci_get_drvdata(dev);
39 int err;
40
41 pci_set_power_state(dev, PCI_D0);
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;
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
57static int ssb_pcihost_probe(struct pci_dev *dev,
58 const struct pci_device_id *id)
59{
60 struct ssb_bus *ssb;
61 int err = -ENOMEM;
62 const char *name;
63 u32 val;
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;
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);
78
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
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
91out:
92 return err;
93
94err_pci_release_regions:
95 pci_release_regions(dev);
96err_pci_disable:
97 pci_disable_device(dev);
98err_kfree_ssb:
99 kfree(ssb);
100 return err;
101}
102
103static 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
114int ssb_pcihost_register(struct pci_driver *driver)
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}
123EXPORT_SYMBOL(ssb_pcihost_register);