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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/platform/x86/peaq-wmi.c | |
parent | Initial commit. (diff) | |
download | linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip |
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/platform/x86/peaq-wmi.c')
-rw-r--r-- | drivers/platform/x86/peaq-wmi.c | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/drivers/platform/x86/peaq-wmi.c b/drivers/platform/x86/peaq-wmi.c new file mode 100644 index 000000000..cf9c44c20 --- /dev/null +++ b/drivers/platform/x86/peaq-wmi.c @@ -0,0 +1,128 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * PEAQ 2-in-1 WMI hotkey driver + * Copyright (C) 2017 Hans de Goede <hdegoede@redhat.com> + */ + +#include <linux/acpi.h> +#include <linux/dmi.h> +#include <linux/input.h> +#include <linux/kernel.h> +#include <linux/module.h> + +#define PEAQ_DOLBY_BUTTON_GUID "ABBC0F6F-8EA1-11D1-00A0-C90629100000" +#define PEAQ_DOLBY_BUTTON_METHOD_ID 5 +#define PEAQ_POLL_INTERVAL_MS 250 +#define PEAQ_POLL_IGNORE_MS 500 +#define PEAQ_POLL_MAX_MS 1000 + +MODULE_ALIAS("wmi:"PEAQ_DOLBY_BUTTON_GUID); + +static struct input_dev *peaq_poll_dev; + +/* + * The Dolby button (yes really a Dolby button) causes an ACPI variable to get + * set on both press and release. The WMI method checks and clears that flag. + * So for a press + release we will get back One from the WMI method either once + * (if polling after the release) or twice (polling between press and release). + * We ignore events for 0.5s after the first event to avoid reporting 2 presses. + */ +static void peaq_wmi_poll(struct input_dev *input_dev) +{ + static unsigned long last_event_time; + static bool had_events; + union acpi_object obj; + acpi_status status; + u32 dummy = 0; + + struct acpi_buffer input = { sizeof(dummy), &dummy }; + struct acpi_buffer output = { sizeof(obj), &obj }; + + status = wmi_evaluate_method(PEAQ_DOLBY_BUTTON_GUID, 0, + PEAQ_DOLBY_BUTTON_METHOD_ID, + &input, &output); + if (ACPI_FAILURE(status)) + return; + + if (obj.type != ACPI_TYPE_INTEGER) { + dev_err(&input_dev->dev, + "Error WMBC did not return an integer\n"); + return; + } + + if (!obj.integer.value) + return; + + if (had_events && time_before(jiffies, last_event_time + + msecs_to_jiffies(PEAQ_POLL_IGNORE_MS))) + return; + + input_event(input_dev, EV_KEY, KEY_SOUND, 1); + input_sync(input_dev); + input_event(input_dev, EV_KEY, KEY_SOUND, 0); + input_sync(input_dev); + + last_event_time = jiffies; + had_events = true; +} + +/* Some other devices (Shuttle XS35) use the same WMI GUID for other purposes */ +static const struct dmi_system_id peaq_dmi_table[] __initconst = { + { + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "PEAQ"), + DMI_MATCH(DMI_PRODUCT_NAME, "PEAQ PMM C1010 MD99187"), + }, + }, + {} +}; + +static int __init peaq_wmi_init(void) +{ + int err; + + /* WMI GUID is not unique, also check for a DMI match */ + if (!dmi_check_system(peaq_dmi_table)) + return -ENODEV; + + if (!wmi_has_guid(PEAQ_DOLBY_BUTTON_GUID)) + return -ENODEV; + + peaq_poll_dev = input_allocate_device(); + if (!peaq_poll_dev) + return -ENOMEM; + + peaq_poll_dev->name = "PEAQ WMI hotkeys"; + peaq_poll_dev->phys = "wmi/input0"; + peaq_poll_dev->id.bustype = BUS_HOST; + input_set_capability(peaq_poll_dev, EV_KEY, KEY_SOUND); + + err = input_setup_polling(peaq_poll_dev, peaq_wmi_poll); + if (err) + goto err_out; + + input_set_poll_interval(peaq_poll_dev, PEAQ_POLL_INTERVAL_MS); + input_set_max_poll_interval(peaq_poll_dev, PEAQ_POLL_MAX_MS); + + err = input_register_device(peaq_poll_dev); + if (err) + goto err_out; + + return 0; + +err_out: + input_free_device(peaq_poll_dev); + return err; +} + +static void __exit peaq_wmi_exit(void) +{ + input_unregister_device(peaq_poll_dev); +} + +module_init(peaq_wmi_init); +module_exit(peaq_wmi_exit); + +MODULE_DESCRIPTION("PEAQ 2-in-1 WMI hotkey driver"); +MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>"); +MODULE_LICENSE("GPL"); |