forked from luck/tmp_suning_uos_patched
platform/x86: peaq-wmi: Add new peaq-wmi driver
PEAQ is a new European OEM, I've bought one of their 2-in-1 x86 devices, which is actually quite a nice device. Under Windows it has Dolby software for "better" sound and you can select different equalizer presets using a special button. This WMI interface for this button is not really nice, as it does not do notifies (it really does not I triple checked), but since I had already figured out the entire WMI interface for this I decided to go the full mile anyway and implement a WMI based input driver for this using input_polldev since, well, we need to poll. This commit adds support for this button making it report KEY_SOUND input events. KEY_SOUND is already used in various places to switch sound into theatre mode and things like that so it seems appropriate here. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Reviewed-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> [dvhart: minor declaration ordering and commit log typo fixes] Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>
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@ -669,6 +669,13 @@ config MSI_WMI
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To compile this driver as a module, choose M here: the module will
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To compile this driver as a module, choose M here: the module will
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be called msi-wmi.
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be called msi-wmi.
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config PEAQ_WMI
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tristate "PEAQ 2-in-1 WMI hotkey driver"
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depends on ACPI_WMI
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depends on INPUT
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help
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Say Y here if you want to support WMI-based hotkeys on PEAQ 2-in-1s.
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config TOPSTAR_LAPTOP
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config TOPSTAR_LAPTOP
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tristate "Topstar Laptop Extras"
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tristate "Topstar Laptop Extras"
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depends on ACPI
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depends on ACPI
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@ -35,6 +35,7 @@ obj-$(CONFIG_PANASONIC_LAPTOP) += panasonic-laptop.o
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obj-$(CONFIG_INTEL_MENLOW) += intel_menlow.o
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obj-$(CONFIG_INTEL_MENLOW) += intel_menlow.o
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obj-$(CONFIG_ACPI_WMI) += wmi.o
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obj-$(CONFIG_ACPI_WMI) += wmi.o
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obj-$(CONFIG_MSI_WMI) += msi-wmi.o
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obj-$(CONFIG_MSI_WMI) += msi-wmi.o
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obj-$(CONFIG_PEAQ_WMI) += peaq-wmi.o
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obj-$(CONFIG_SURFACE3_WMI) += surface3-wmi.o
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obj-$(CONFIG_SURFACE3_WMI) += surface3-wmi.o
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obj-$(CONFIG_TOPSTAR_LAPTOP) += topstar-laptop.o
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obj-$(CONFIG_TOPSTAR_LAPTOP) += topstar-laptop.o
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100
drivers/platform/x86/peaq-wmi.c
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100
drivers/platform/x86/peaq-wmi.c
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@ -0,0 +1,100 @@
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/*
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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, 1,
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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 > 0)
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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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