projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 61e115a5 MB |
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 | ||
| 5580373f | 14 | #include <linux/pm.h> |
| 61e115a5 | 15 | #include <linux/pci.h> |
| 1014c22e | 16 | #include <linux/export.h> |
| 5a0e3ad6 | 17 | #include <linux/slab.h> |
| 61e115a5 MB |
18 | #include <linux/ssb/ssb.h> |
| 19 | ||
| 20 | ||
| 5580373f AS |
21 | #ifdef CONFIG_PM_SLEEP |
| 22 | static int ssb_pcihost_suspend(struct device *d) | |
| 61e115a5 | 23 | { |
| 5580373f | 24 | struct pci_dev *dev = to_pci_dev(d); |
| 8fe2b65a MB |
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; | |
| 61e115a5 MB |
31 | pci_save_state(dev); |
| 32 | pci_disable_device(dev); | |
| 5580373f AS |
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); | |
| 61e115a5 MB |
39 | |
| 40 | return 0; | |
| 41 | } | |
| 42 | ||
| 5580373f | 43 | static int ssb_pcihost_resume(struct device *d) |
| 61e115a5 | 44 | { |
| 5580373f | 45 | struct pci_dev *dev = to_pci_dev(d); |
| 8fe2b65a | 46 | struct ssb_bus *ssb = pci_get_drvdata(dev); |
| 61e115a5 MB |
47 | int err; |
| 48 | ||
| 5580373f | 49 | pci_back_from_sleep(dev); |
| 61e115a5 MB |
50 | err = pci_enable_device(dev); |
| 51 | if (err) | |
| 52 | return err; | |
| 53 | pci_restore_state(dev); | |
| 8fe2b65a MB |
54 | err = ssb_bus_resume(ssb); |
| 55 | if (err) | |
| 56 | return err; | |
| 61e115a5 MB |
57 | |
| 58 | return 0; | |
| 59 | } | |
| 5580373f AS |
60 | |
| 61 | static 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 */ | |
| 61e115a5 | 66 | |
| 163247c1 GKH |
67 | static int ssb_pcihost_probe(struct pci_dev *dev, |
| 68 | const struct pci_device_id *id) | |
| 61e115a5 MB |
69 | { |
| 70 | struct ssb_bus *ssb; | |
| 71 | int err = -ENOMEM; | |
| 72 | const char *name; | |
| e081685c | 73 | u32 val; |
| 61e115a5 MB |
74 | |
| 75 | ssb = kzalloc(sizeof(*ssb), GFP_KERNEL); | |
| 76 | if (!ssb) | |
| 77 | goto out; | |
| 78 | err = pci_enable_device(dev); | |
| 79 | if (err) | |
| 80 | goto err_kfree_ssb; | |
| b7b05fe7 | 81 | name = dev_name(&dev->dev); |
| 61e115a5 MB |
82 | if (dev->driver && dev->driver->name) |
| 83 | name = dev->driver->name; | |
| 84 | err = pci_request_regions(dev, name); | |
| 85 | if (err) | |
| 86 | goto err_pci_disable; | |
| 87 | pci_set_master(dev); | |
| 88 | ||
| e081685c LF |
89 | /* Disable the RETRY_TIMEOUT register (0x41) to keep |
| 90 | * PCI Tx retries from interfering with C3 CPU state */ | |
| 91 | pci_read_config_dword(dev, 0x40, &val); | |
| 92 | if ((val & 0x0000ff00) != 0) | |
| 93 | pci_write_config_dword(dev, 0x40, val & 0xffff00ff); | |
| 94 | ||
| 61e115a5 MB |
95 | err = ssb_bus_pcibus_register(ssb, dev); |
| 96 | if (err) | |
| 97 | goto err_pci_release_regions; | |
| 98 | ||
| 99 | pci_set_drvdata(dev, ssb); | |
| 100 | ||
| 101 | out: | |
| 102 | return err; | |
| 103 | ||
| 104 | err_pci_release_regions: | |
| 105 | pci_release_regions(dev); | |
| 106 | err_pci_disable: | |
| 107 | pci_disable_device(dev); | |
| 108 | err_kfree_ssb: | |
| 109 | kfree(ssb); | |
| 110 | return err; | |
| 111 | } | |
| 112 | ||
| 113 | static void ssb_pcihost_remove(struct pci_dev *dev) | |
| 114 | { | |
| 115 | struct ssb_bus *ssb = pci_get_drvdata(dev); | |
| 116 | ||
| 117 | ssb_bus_unregister(ssb); | |
| 118 | pci_release_regions(dev); | |
| 119 | pci_disable_device(dev); | |
| 120 | kfree(ssb); | |
| 121 | pci_set_drvdata(dev, NULL); | |
| 122 | } | |
| 123 | ||
| 163247c1 | 124 | int ssb_pcihost_register(struct pci_driver *driver) |
| 61e115a5 MB |
125 | { |
| 126 | driver->probe = ssb_pcihost_probe; | |
| 127 | driver->remove = ssb_pcihost_remove; | |
| 5580373f AS |
128 | #ifdef CONFIG_PM_SLEEP |
| 129 | driver->driver.pm = &ssb_pcihost_pm_ops; | |
| 130 | #endif | |
| 61e115a5 MB |
131 | |
| 132 | return pci_register_driver(driver); | |
| 133 | } | |
| 134 | EXPORT_SYMBOL(ssb_pcihost_register); |