| 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 |
| 22 | static 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 | |
| 43 | static 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 | |
| 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 */ |
| 66 | |
| 67 | static 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 | const char *name; |
| 73 | u32 val; |
| 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; |
| 81 | name = dev_name(&dev->dev); |
| 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 | |
| 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 | |
| 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 | |
| 124 | int ssb_pcihost_register(struct pci_driver *driver) |
| 125 | { |
| 126 | driver->probe = ssb_pcihost_probe; |
| 127 | driver->remove = ssb_pcihost_remove; |
| 128 | #ifdef CONFIG_PM_SLEEP |
| 129 | driver->driver.pm = &ssb_pcihost_pm_ops; |
| 130 | #endif |
| 131 | |
| 132 | return pci_register_driver(driver); |
| 133 | } |
| 134 | EXPORT_SYMBOL(ssb_pcihost_register); |