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| 2 | |
| 3 | * Input Power Event -> APM Bridge
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| 4 | *
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| 5 | * Copyright (c) 2007 Richard Purdie
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| 6 |
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| 7 |
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| 8 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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| 9 |
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| 10 | #include <linux/module.h>
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| 11 | #include <linux/input.h>
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| 12 | #include <linux/slab.h>
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| 13 | #include <linux/init.h>
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| 14 | #include <linux/tty.h>
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| 15 | #include <linux/delay.h>
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| 16 | #include <linux/pm.h>
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| 17 | #include <linux/apm-emulation.h>
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| 18 |
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| 19 | static void system_power_event(unsigned int keycode)
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| 20 | {
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| 21 | switch (keycode) {
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| 22 | case KEY_SUSPEND:
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| 23 | apm_queue_event(APM_USER_SUSPEND);
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| 24 | pr_info("Requesting system suspend...\n");
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| 25 | break;
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| 26 | default:
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| 27 | break;
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| 28 | }
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| 29 | }
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| 30 |
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| 31 | static void apmpower_event(struct input_handle *handle, unsigned int type,
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| 32 | unsigned int code, int value)
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| 33 | {
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| 34 |
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| 35 | if (value != 1)
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| 36 | return;
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| 37 |
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| 38 | switch (type) {
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| 39 | case EV_PWR:
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| 40 | system_power_event(code);
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| 41 | break;
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| 42 |
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| 43 | default:
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| 44 | break;
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| 45 | }
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| 46 | }
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| 47 |
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| 48 | static int apmpower_connect(struct input_handler *handler,
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| 49 | struct input_dev *dev,
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| 50 | const struct input_device_id *id)
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| 51 | {
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| 52 | struct input_handle *handle;
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| 53 | int error;
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| 54 |
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| 55 | handle = kzalloc_obj(struct input_handle);
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| 56 | if (!handle)
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| 57 | return -ENOMEM;
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| 58 |
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| 59 | handle->dev = dev;
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| 60 | handle->handler = handler;
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| 61 | handle->name = "apm-power";
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| 62 |
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| 63 | error = input_register_handle(handle);
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| 64 | if (error) {
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| 65 | pr_err("Failed to register input power handler, error %d\n",
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| 66 | error);
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| 67 | kfree(handle);
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| 68 | return error;
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| 69 | }
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| 70 |
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| 71 | error = input_open_device(handle);
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| 72 | if (error) {
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| 73 | pr_err("Failed to open input power device, error %d\n", error);
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| 74 | input_unregister_handle(handle);
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| 75 | kfree(handle);
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| 76 | return error;
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| 77 | }
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| 78 |
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| 79 | return 0;
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| 80 | }
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| 81 |
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| 82 | static void apmpower_disconnect(struct input_handle *handle)
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| 83 | {
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| 84 | input_close_device(handle);
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| 85 | input_unregister_handle(handle);
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| 86 | kfree(handle);
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| 87 | }
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| 88 |
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| 89 | static const struct input_device_id apmpower_ids[] = {
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| 90 | {
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| 91 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT,
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| 92 | .evbit = { BIT_MASK(EV_PWR) },
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| 93 | },
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| 94 | { },
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| 95 | };
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| 96 |
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| 97 | MODULE_DEVICE_TABLE(input, apmpower_ids);
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| 98 |
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| 99 | static struct input_handler apmpower_handler = {
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| 100 | .event = apmpower_event,
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| 101 | .connect = apmpower_connect,
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| 102 | .disconnect = apmpower_disconnect,
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| 103 | .name = "apm-power",
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| 104 | .id_table = apmpower_ids,
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| 105 | };
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| 106 |
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| 107 | static int __init apmpower_init(void)
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| 108 | {
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| 109 | return input_register_handler(&apmpower_handler);
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| 110 | }
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| 111 |
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| 112 | static void __exit apmpower_exit(void)
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| 113 | {
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| 114 | input_unregister_handler(&apmpower_handler);
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| 115 | }
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| 116 |
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| 117 | module_init(apmpower_init);
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| 118 | module_exit(apmpower_exit);
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| 119 |
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| 120 | MODULE_AUTHOR("Richard Purdie <[email protected]>");
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| 121 | MODULE_DESCRIPTION("Input Power Event -> APM Bridge");
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| 122 | MODULE_LICENSE("GPL");
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