Loading...
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);
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, 0);
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 __devinit 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 __devinit 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);