| 1 | |
| 2 | * Sonics Silicon Backplane
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| 3 | * PCI Hostdevice wrapper
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| 4 | *
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| 5 | * Copyright (c) 2005 Martin Langer <[email protected]>
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| 6 | * Copyright (c) 2005 Stefano Brivio <[email protected]>
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| 7 | * Copyright (c) 2005 Danny van Dyk <[email protected]>
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| 8 | * Copyright (c) 2005 Andreas Jaggi <[email protected]>
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| 9 | * Copyright (c) 2005-2007 Michael Buesch <[email protected]>
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| 10 | *
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| 11 | * Licensed under the GNU/GPL. See COPYING for details.
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| 12 |
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| 13 |
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| 14 | #include <linux/pm.h>
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| 15 | #include <linux/pci.h>
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| 16 | #include <linux/export.h>
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| 17 | #include <linux/slab.h>
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| 18 | #include <linux/ssb/ssb.h>
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| 19 |
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| 20 |
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| 21 | #ifdef CONFIG_PM_SLEEP
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| 22 | static int ssb_pcihost_suspend(struct device *d)
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| 23 | {
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| 24 | struct pci_dev *dev = to_pci_dev(d);
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| 25 | struct ssb_bus *ssb = pci_get_drvdata(dev);
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| 26 | int err;
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| 27 |
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| 28 | err = ssb_bus_suspend(ssb);
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| 29 | if (err)
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| 30 | return err;
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| 31 | pci_save_state(dev);
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| 32 | pci_disable_device(dev);
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| 33 |
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| 34 | |
| 35 | enable pci wakeup posibility.
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| 36 | device_set_wakeup_enable(d, d->power.wakeup_path);
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| 37 |
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| 38 | pci_prepare_to_sleep(dev);
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| 39 |
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| 40 | return 0;
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| 41 | }
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| 42 |
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| 43 | static int ssb_pcihost_resume(struct device *d)
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| 44 | {
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| 45 | struct pci_dev *dev = to_pci_dev(d);
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| 46 | struct ssb_bus *ssb = pci_get_drvdata(dev);
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| 47 | int err;
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| 48 |
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| 49 | pci_back_from_sleep(dev);
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| 50 | err = pci_enable_device(dev);
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| 51 | if (err)
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| 52 | return err;
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| 53 | pci_restore_state(dev);
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| 54 | err = ssb_bus_resume(ssb);
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| 55 | if (err)
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| 56 | return err;
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| 57 |
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| 58 | return 0;
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| 59 | }
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| 60 |
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| 61 | static const struct dev_pm_ops ssb_pcihost_pm_ops = {
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| 62 | SET_SYSTEM_SLEEP_PM_OPS(ssb_pcihost_suspend, ssb_pcihost_resume)
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| 63 | };
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| 64 |
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| 65 | #endif
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| 66 |
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| 67 | static int ssb_pcihost_probe(struct pci_dev *dev,
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| 68 | const struct pci_device_id *id)
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| 69 | {
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| 70 | struct ssb_bus *ssb;
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| 71 | int err = -ENOMEM;
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| 72 | u32 val;
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| 73 |
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| 74 | ssb = kzalloc_obj(*ssb);
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| 75 | if (!ssb)
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| 76 | goto out;
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| 77 | err = pci_enable_device(dev);
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| 78 | if (err)
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| 79 | goto err_kfree_ssb;
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| 80 | err = pci_request_regions(dev, dev_driver_string(&dev->dev));
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| 81 | if (err)
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| 82 | goto err_pci_disable;
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| 83 | pci_set_master(dev);
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| 84 |
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| 85 | |
| 86 | * PCI Tx retries from interfering with C3 CPU state
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| 87 | pci_read_config_dword(dev, 0x40, &val);
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| 88 | if ((val & 0x0000ff00) != 0)
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| 89 | pci_write_config_dword(dev, 0x40, val & 0xffff00ff);
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| 90 |
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| 91 | err = ssb_bus_pcibus_register(ssb, dev);
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| 92 | if (err)
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| 93 | goto err_pci_release_regions;
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| 94 |
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| 95 | pci_set_drvdata(dev, ssb);
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| 96 |
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| 97 | out:
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| 98 | return err;
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| 99 |
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| 100 | err_pci_release_regions:
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| 101 | pci_release_regions(dev);
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| 102 | err_pci_disable:
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| 103 | pci_disable_device(dev);
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| 104 | err_kfree_ssb:
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| 105 | kfree(ssb);
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| 106 | return err;
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| 107 | }
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| 108 |
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| 109 | static void ssb_pcihost_remove(struct pci_dev *dev)
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| 110 | {
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| 111 | struct ssb_bus *ssb = pci_get_drvdata(dev);
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| 112 |
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| 113 | ssb_bus_unregister(ssb);
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| 114 | pci_release_regions(dev);
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| 115 | pci_disable_device(dev);
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| 116 | kfree(ssb);
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| 117 | pci_set_drvdata(dev, NULL);
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| 118 | }
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| 119 |
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| 120 | int ssb_pcihost_register(struct pci_driver *driver)
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| 121 | {
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| 122 | driver->probe = ssb_pcihost_probe;
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| 123 | driver->remove = ssb_pcihost_remove;
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| 124 | #ifdef CONFIG_PM_SLEEP
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| 125 | driver->driver.pm = &ssb_pcihost_pm_ops;
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| 126 | #endif
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| 127 |
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| 128 | return pci_register_driver(driver);
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| 129 | }
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| 130 | EXPORT_SYMBOL(ssb_pcihost_register);
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