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According to Hans de Goede, WMI interface of thh peaq-wmi module has 10 instances but corresponding ACPI WMBC method does not check Arg0 (instance number) at all. Therefore evaluate WMI method with first instance number (0x0) instead of second (0x1). Signed-off-by: Pali Rohár <pali.rohar@gmail.com> Cc: Hans de Goede <hdegoede@redhat.com> Acked-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
101 lines
2.9 KiB
C
101 lines
2.9 KiB
C
/*
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* PEAQ 2-in-1 WMI hotkey driver
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* Copyright (C) 2017 Hans de Goede <hdegoede@redhat.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/acpi.h>
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#include <linux/input-polldev.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#define PEAQ_DOLBY_BUTTON_GUID "ABBC0F6F-8EA1-11D1-00A0-C90629100000"
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#define PEAQ_DOLBY_BUTTON_METHOD_ID 5
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#define PEAQ_POLL_INTERVAL_MS 250
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#define PEAQ_POLL_IGNORE_MS 500
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#define PEAQ_POLL_MAX_MS 1000
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MODULE_ALIAS("wmi:"PEAQ_DOLBY_BUTTON_GUID);
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static unsigned int peaq_ignore_events_counter;
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static struct input_polled_dev *peaq_poll_dev;
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/*
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* The Dolby button (yes really a Dolby button) causes an ACPI variable to get
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* set on both press and release. The WMI method checks and clears that flag.
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* So for a press + release we will get back One from the WMI method either once
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* (if polling after the release) or twice (polling between press and release).
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* We ignore events for 0.5s after the first event to avoid reporting 2 presses.
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*/
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static void peaq_wmi_poll(struct input_polled_dev *dev)
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{
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union acpi_object obj;
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acpi_status status;
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u32 dummy = 0;
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struct acpi_buffer input = { sizeof(dummy), &dummy };
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struct acpi_buffer output = { sizeof(obj), &obj };
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status = wmi_evaluate_method(PEAQ_DOLBY_BUTTON_GUID, 0,
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PEAQ_DOLBY_BUTTON_METHOD_ID,
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&input, &output);
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if (ACPI_FAILURE(status))
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return;
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if (obj.type != ACPI_TYPE_INTEGER) {
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dev_err(&peaq_poll_dev->input->dev,
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"Error WMBC did not return an integer\n");
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return;
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}
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if (peaq_ignore_events_counter && peaq_ignore_events_counter--)
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return;
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if (obj.integer.value) {
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input_event(peaq_poll_dev->input, EV_KEY, KEY_SOUND, 1);
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input_sync(peaq_poll_dev->input);
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input_event(peaq_poll_dev->input, EV_KEY, KEY_SOUND, 0);
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input_sync(peaq_poll_dev->input);
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peaq_ignore_events_counter = max(1u,
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PEAQ_POLL_IGNORE_MS / peaq_poll_dev->poll_interval);
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}
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}
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static int __init peaq_wmi_init(void)
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{
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if (!wmi_has_guid(PEAQ_DOLBY_BUTTON_GUID))
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return -ENODEV;
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peaq_poll_dev = input_allocate_polled_device();
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if (!peaq_poll_dev)
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return -ENOMEM;
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peaq_poll_dev->poll = peaq_wmi_poll;
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peaq_poll_dev->poll_interval = PEAQ_POLL_INTERVAL_MS;
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peaq_poll_dev->poll_interval_max = PEAQ_POLL_MAX_MS;
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peaq_poll_dev->input->name = "PEAQ WMI hotkeys";
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peaq_poll_dev->input->phys = "wmi/input0";
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peaq_poll_dev->input->id.bustype = BUS_HOST;
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input_set_capability(peaq_poll_dev->input, EV_KEY, KEY_SOUND);
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return input_register_polled_device(peaq_poll_dev);
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}
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static void __exit peaq_wmi_exit(void)
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{
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if (!wmi_has_guid(PEAQ_DOLBY_BUTTON_GUID))
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return;
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input_unregister_polled_device(peaq_poll_dev);
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}
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module_init(peaq_wmi_init);
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module_exit(peaq_wmi_exit);
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MODULE_DESCRIPTION("PEAQ 2-in-1 WMI hotkey driver");
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MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
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MODULE_LICENSE("GPL");
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