| 1 | |
| 2 | |
| 3 | * container.c - ACPI Generic Container Driver
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| 4 | *
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| 5 | * Copyright (C) 2004 Anil S Keshavamurthy ([email protected])
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| 6 | * Copyright (C) 2004 Keiichiro Tokunaga ([email protected])
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| 7 | * Copyright (C) 2004 Motoyuki Ito ([email protected])
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| 8 | * Copyright (C) 2004 FUJITSU LIMITED
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| 9 | * Copyright (C) 2004, 2013 Intel Corp.
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| 10 | * Author: Rafael J. Wysocki <[email protected]>
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| 11 |
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| 12 | #include <linux/acpi.h>
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| 13 | #include <linux/container.h>
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| 14 |
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| 15 | #include "internal.h"
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| 16 |
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| 17 | static const struct acpi_device_id container_device_ids[] = {
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| 18 | {"ACPI0004", 0},
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| 19 | {"PNP0A05", 0},
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| 20 | {"PNP0A06", 0},
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| 21 | {"", 0},
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| 22 | };
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| 23 |
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| 24 | #ifdef CONFIG_ACPI_CONTAINER
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| 25 |
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| 26 | static int check_offline(struct acpi_device *adev, void *not_used)
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| 27 | {
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| 28 | if (acpi_scan_is_offline(adev, false))
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| 29 | return 0;
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| 30 |
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| 31 | return -EBUSY;
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| 32 | }
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| 33 |
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| 34 | static int acpi_container_offline(struct container_dev *cdev)
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| 35 | {
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| 36 |
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| 37 | return acpi_dev_for_each_child(ACPI_COMPANION(&cdev->dev), check_offline, NULL);
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| 38 | }
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| 39 |
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| 40 | static void acpi_container_release(struct device *dev)
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| 41 | {
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| 42 | kfree(to_container_dev(dev));
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| 43 | }
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| 44 |
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| 45 | static int container_device_attach(struct acpi_device *adev,
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| 46 | const struct acpi_device_id *not_used)
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| 47 | {
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| 48 | struct container_dev *cdev;
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| 49 | struct device *dev;
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| 50 | int ret;
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| 51 |
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| 52 | if (adev->flags.is_dock_station)
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| 53 | return 0;
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| 54 |
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| 55 | cdev = kzalloc_obj(*cdev);
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| 56 | if (!cdev)
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| 57 | return -ENOMEM;
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| 58 |
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| 59 | cdev->offline = acpi_container_offline;
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| 60 | dev = &cdev->dev;
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| 61 | dev->bus = &container_subsys;
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| 62 | dev_set_name(dev, "%s", dev_name(&adev->dev));
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| 63 | ACPI_COMPANION_SET(dev, adev);
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| 64 | dev->release = acpi_container_release;
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| 65 | ret = device_register(dev);
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| 66 | if (ret) {
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| 67 | put_device(dev);
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| 68 | return ret;
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| 69 | }
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| 70 | adev->driver_data = dev;
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| 71 | return 1;
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| 72 | }
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| 73 |
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| 74 | static void container_device_detach(struct acpi_device *adev)
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| 75 | {
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| 76 | struct device *dev = acpi_driver_data(adev);
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| 77 |
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| 78 | adev->driver_data = NULL;
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| 79 | if (dev)
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| 80 | device_unregister(dev);
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| 81 | }
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| 82 |
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| 83 | static void container_device_online(struct acpi_device *adev)
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| 84 | {
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| 85 | struct device *dev = acpi_driver_data(adev);
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| 86 |
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| 87 | kobject_uevent(&dev->kobj, KOBJ_ONLINE);
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| 88 | }
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| 89 |
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| 90 | static struct acpi_scan_handler container_handler = {
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| 91 | .ids = container_device_ids,
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| 92 | .attach = container_device_attach,
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| 93 | .detach = container_device_detach,
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| 94 | .hotplug = {
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| 95 | .enabled = true,
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| 96 | .demand_offline = true,
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| 97 | .notify_online = container_device_online,
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| 98 | },
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| 99 | };
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| 100 |
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| 101 | void __init acpi_container_init(void)
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| 102 | {
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| 103 | acpi_scan_add_handler(&container_handler);
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| 104 | }
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| 105 |
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| 106 | #else
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| 107 |
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| 108 | static struct acpi_scan_handler container_handler = {
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| 109 | .ids = container_device_ids,
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| 110 | };
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| 111 |
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| 112 | void __init acpi_container_init(void)
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| 113 | {
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| 114 | acpi_scan_add_handler_with_hotplug(&container_handler, "container");
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| 115 | }
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| 116 |
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| 117 | #endif
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