| 1 | |
| 2 | |
| 3 | * Copyright (c) 1999-2001 Vojtech Pavlik
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| 4 |
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| 5 |
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| 6 | |
| 7 | * Input driver event debug module - dumps all events into syslog
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| 8 |
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| 9 |
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| 10 | |
| 11 |
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| 12 |
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| 13 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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| 14 |
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| 15 | #include <linux/slab.h>
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| 16 | #include <linux/module.h>
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| 17 | #include <linux/input.h>
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| 18 | #include <linux/init.h>
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| 19 | #include <linux/device.h>
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| 20 |
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| 21 | MODULE_AUTHOR("Vojtech Pavlik <[email protected]>");
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| 22 | MODULE_DESCRIPTION("Input driver event debug module");
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| 23 | MODULE_LICENSE("GPL");
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| 24 |
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| 25 | static void evbug_event(struct input_handle *handle, unsigned int type, unsigned int code, int value)
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| 26 | {
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| 27 | printk(KERN_DEBUG pr_fmt("Event. Dev: %s, Type: %d, Code: %d, Value: %d\n"),
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| 28 | dev_name(&handle->dev->dev), type, code, value);
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| 29 | }
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| 30 |
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| 31 | static int evbug_connect(struct input_handler *handler, struct input_dev *dev,
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| 32 | const struct input_device_id *id)
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| 33 | {
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| 34 | struct input_handle *handle;
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| 35 | int error;
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| 36 |
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| 37 | handle = kzalloc(sizeof(struct input_handle), GFP_KERNEL);
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| 38 | if (!handle)
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| 39 | return -ENOMEM;
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| 40 |
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| 41 | handle->dev = dev;
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| 42 | handle->handler = handler;
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| 43 | handle->name = "evbug";
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| 44 |
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| 45 | error = input_register_handle(handle);
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| 46 | if (error)
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| 47 | goto err_free_handle;
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| 48 |
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| 49 | error = input_open_device(handle);
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| 50 | if (error)
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| 51 | goto err_unregister_handle;
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| 52 |
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| 53 | printk(KERN_DEBUG pr_fmt("Connected device: %s (%s at %s)\n"),
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| 54 | dev_name(&dev->dev),
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| 55 | dev->name ?: "unknown",
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| 56 | dev->phys ?: "unknown");
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| 57 |
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| 58 | return 0;
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| 59 |
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| 60 | err_unregister_handle:
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| 61 | input_unregister_handle(handle);
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| 62 | err_free_handle:
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| 63 | kfree(handle);
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| 64 | return error;
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| 65 | }
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| 66 |
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| 67 | static void evbug_disconnect(struct input_handle *handle)
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| 68 | {
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| 69 | printk(KERN_DEBUG pr_fmt("Disconnected device: %s\n"),
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| 70 | dev_name(&handle->dev->dev));
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| 71 |
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| 72 | input_close_device(handle);
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| 73 | input_unregister_handle(handle);
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| 74 | kfree(handle);
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| 75 | }
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| 76 |
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| 77 | static const struct input_device_id evbug_ids[] = {
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| 78 | { .driver_info = 1 },
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| 79 | { },
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| 80 | };
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| 81 |
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| 82 | MODULE_DEVICE_TABLE(input, evbug_ids);
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| 83 |
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| 84 | static struct input_handler evbug_handler = {
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| 85 | .event = evbug_event,
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| 86 | .connect = evbug_connect,
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| 87 | .disconnect = evbug_disconnect,
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| 88 | .name = "evbug",
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| 89 | .id_table = evbug_ids,
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| 90 | };
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| 91 |
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| 92 | static int __init evbug_init(void)
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| 93 | {
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| 94 | return input_register_handler(&evbug_handler);
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| 95 | }
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| 96 |
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| 97 | static void __exit evbug_exit(void)
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| 98 | {
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| 99 | input_unregister_handler(&evbug_handler);
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| 100 | }
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| 101 |
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| 102 | module_init(evbug_init);
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| 103 | module_exit(evbug_exit);
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