From patchwork Mon Dec 3 18:53:39 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ayman Bagabas X-Patchwork-Id: 10710383 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 970E11057 for ; Mon, 3 Dec 2018 18:56:18 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 88FED2968C for ; Mon, 3 Dec 2018 18:56:18 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 7D1B429791; Mon, 3 Dec 2018 18:56:18 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.7 required=2.0 tests=BAYES_00,DKIM_ADSP_CUSTOM_MED, DKIM_INVALID,DKIM_SIGNED,FREEMAIL_FROM,MAILING_LIST_MULTI,RCVD_IN_DNSWL_NONE autolearn=unavailable version=3.3.1 Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 6C2FB2968C for ; Mon, 3 Dec 2018 18:56:17 +0000 (UTC) Received: from alsa0.perex.cz (localhost [127.0.0.1]) by alsa0.perex.cz (Postfix) with ESMTP id ED757267B20; Mon, 3 Dec 2018 19:56:05 +0100 (CET) X-Original-To: alsa-devel@alsa-project.org Delivered-To: alsa-devel@alsa-project.org Received: by alsa0.perex.cz (Postfix, from userid 1000) id DF5D4267AF9; Mon, 3 Dec 2018 19:54:08 +0100 (CET) Received: from mail-yb1-f196.google.com (mail-yb1-f196.google.com [209.85.219.196]) by alsa0.perex.cz (Postfix) with ESMTP id DE0C1267B14 for ; Mon, 3 Dec 2018 19:53:58 +0100 (CET) Received: by mail-yb1-f196.google.com with SMTP id a67-v6so5759917ybg.1 for ; Mon, 03 Dec 2018 10:53:58 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=8zZTnSbo8cQ2o+GieMnXGxj9kwkcdcthOGgnhLwEJto=; b=TL8CMvrbwbAsiLk4yRT2+ojo9qVqIP8OrMr+j5fd/HckSNKhZMHIy3ih1yGNRGj5C3 Qe7B3wG/1Euyr0oPTTg0El8J7O8ItEXSj3h9Kh/6mweUjyb8RMzwATpM4xMdCQ40gpva o1wIhc169I7Wbo91ekBD7xpJxQw9GKPwMxscFtbtyIZtOjVxX7pL4ATdWMa2F/cUMZ0c jKvJykPdhJEiRSuIbcnlF4CDar9vl587Wj1SOIV58nZZy+qKRcc3Hz7j7D8jGMUK1ojR 73IVH6qyCJOXJz2LJbOiULZVfJmN2mVeAziknZRer5/rryK17Q+0Ox/6ondD9MbriKi7 0C9Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=8zZTnSbo8cQ2o+GieMnXGxj9kwkcdcthOGgnhLwEJto=; b=AYhajZfgp1ixaJ6WXg7YtC9phmokTYfktJcaN8zQdjfWpHpw+tMOjl5pc4O+k2NvNi 3of8qR/Lrdemc3QespbUD8JLnRiQBUoE4SRN/tTYeAY8azKFaW2PHml3+btX0rfa5gqG qZDY6UKrp3E1DPT8cHq8fyk1jokafZPEyQTSD1JI3XrQP+J2LOIcuRsjwjcdiph4sbrs VMdbJoi2C8E7w57sJIs17ZCl2MGn5gP8e7gRl1eVf1IbksZrRHBy8Tkkf2go/sApPX17 vueK0v9X/TKGmsnHk3XkRSkjDNg47aDKDyxkNeo/CqKQYS1s9YK9otS1oJk+j5sZk4qd Z+TQ== X-Gm-Message-State: AA+aEWam9JCB81bnBrckTsd0NCHFG4Q1505Df/mrp732srYckWxVOxfe SP4wd+zgQ1LfesI/VOMJRA== X-Google-Smtp-Source: AFSGD/XK+cFkwVPQqO1PahdHnfto/u+b6CkSNaVTkr6w1Sa2XEjyLwZ4U9viaAAPWSmYBMRT2knsQg== X-Received: by 2002:a25:aca6:: with SMTP id x38mr2651743ybi.49.1543863236971; Mon, 03 Dec 2018 10:53:56 -0800 (PST) Received: from 960.armstrong.edu ([130.254.104.55]) by smtp.gmail.com with ESMTPSA id u132sm4842769ywc.11.2018.12.03.10.53.56 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Mon, 03 Dec 2018 10:53:56 -0800 (PST) From: Ayman Bagabas To: Darren Hart , Andy Shevchenko , Jaroslav Kysela , Takashi Iwai , Kailang Yang , Hui Wang , linux-kernel@vger.kernel.org, platform-driver-x86@vger.kernel.org, alsa-devel@alsa-project.org Date: Mon, 3 Dec 2018 13:53:39 -0500 Message-Id: <20181203185344.3521-3-ayman.bagabas@gmail.com> X-Mailer: git-send-email 2.19.2 In-Reply-To: <20181203185344.3521-1-ayman.bagabas@gmail.com> References: <20181203185344.3521-1-ayman.bagabas@gmail.com> MIME-Version: 1.0 X-Mailman-Approved-At: Mon, 03 Dec 2018 19:55:57 +0100 Cc: ayman.bagabas@gmail.com Subject: [alsa-devel] [PATCH v9 2/3] x86: add support for Huawei WMI hotkeys. X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org X-Virus-Scanned: ClamAV using ClamSMTP This driver adds support for missing hotkeys on some Huawei laptops. Laptops such as the Matebook X have non functioning hotkeys. Whereas newer laptops such as the Matebook X Pro come with working hotkeys out of the box. Old laptops, such as the Matebook X, report hotkey events through ACPI device "\WMI0". However, new laptops, such as the Matebook X Pro, does not have this WMI device. All the hotkeys on the Matebook X Pro work fine without this patch except (micmute, wlan, and huawei key). These keys and the brightness keys report events to "\AMW0" ACPI device. One problem is that brightness keys on the Matebook X Pro work without this patch. This results in reporting two brightness key press events one is captured by ACPI and another by this driver. A solution would be to check if such event came from the "\AMW0" WMI driver then skip reporting event. Another solution would be to leave this to user-space to handle. Which can be achieved by using "hwdb" tables and remap those keys to "unknown". This solution seems more natural to me because it leaves the decision to user-space. Signed-off-by: Ayman Bagabas --- drivers/platform/x86/Kconfig | 16 +++ drivers/platform/x86/Makefile | 1 + drivers/platform/x86/huawei-wmi.c | 226 ++++++++++++++++++++++++++++++ 3 files changed, 243 insertions(+) create mode 100644 drivers/platform/x86/huawei-wmi.c diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig index 87f70e8f4dd0..27db3ce7a1e1 100644 --- a/drivers/platform/x86/Kconfig +++ b/drivers/platform/x86/Kconfig @@ -1292,6 +1292,22 @@ config INTEL_ATOMISP2_PM To compile this driver as a module, choose M here: the module will be called intel_atomisp2_pm. +config HUAWEI_WMI + tristate "Huawei WMI hotkeys driver" + depends on ACPI_WMI + depends on INPUT + select INPUT_SPARSEKMAP + select LEDS_CLASS + select LEDS_TRIGGERS + select LEDS_TRIGGER_AUDIO + help + This driver provides support for Huawei WMI hotkeys. + It enables the missing keys and adds support to the micmute + LED found on some of these laptops. + + To compile this driver as a module, choose M here: the module + will be called huawei-wmi. + endif # X86_PLATFORM_DEVICES config PMC_ATOM diff --git a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makefile index 39ae94135406..d841c550e3cc 100644 --- a/drivers/platform/x86/Makefile +++ b/drivers/platform/x86/Makefile @@ -32,6 +32,7 @@ obj-$(CONFIG_ACERHDF) += acerhdf.o obj-$(CONFIG_HP_ACCEL) += hp_accel.o obj-$(CONFIG_HP_WIRELESS) += hp-wireless.o obj-$(CONFIG_HP_WMI) += hp-wmi.o +obj-$(CONFIG_HUAWEI_WMI) += huawei-wmi.o obj-$(CONFIG_AMILO_RFKILL) += amilo-rfkill.o obj-$(CONFIG_GPD_POCKET_FAN) += gpd-pocket-fan.o obj-$(CONFIG_TC1100_WMI) += tc1100-wmi.o diff --git a/drivers/platform/x86/huawei-wmi.c b/drivers/platform/x86/huawei-wmi.c new file mode 100644 index 000000000000..afa030fd1285 --- /dev/null +++ b/drivers/platform/x86/huawei-wmi.c @@ -0,0 +1,226 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Huawei WMI hotkeys + * + * Copyright (C) 2018 Ayman Bagabas + */ + +#include +#include +#include +#include +#include +#include + +/* + * Huawei WMI Events GUIDs + */ +#define WMI0_EVENT_GUID "59142400-C6A3-40fa-BADB-8A2652834100" +#define AMW0_EVENT_GUID "ABBC0F5C-8EA1-11D1-A000-C90629100000" + +struct huawei_wmi_priv { + struct input_dev *idev; + struct led_classdev cdev; + acpi_handle handle; + char *acpi_method; +}; + +static const struct key_entry huawei_wmi_keymap[] = { + { KE_KEY, 0x281, { KEY_BRIGHTNESSDOWN } }, + { KE_KEY, 0x282, { KEY_BRIGHTNESSUP } }, + { KE_KEY, 0x284, { KEY_MUTE } }, + { KE_KEY, 0x285, { KEY_VOLUMEDOWN } }, + { KE_KEY, 0x286, { KEY_VOLUMEUP } }, + { KE_KEY, 0x287, { KEY_MICMUTE } }, + { KE_KEY, 0x289, { KEY_WLAN } }, + // Huawei |M| button + { KE_KEY, 0x28a, { KEY_CONFIG } }, + // Keyboard light + { KE_IGNORE, 0x293, { KEY_KBDILLUMTOGGLE } }, + { KE_IGNORE, 0x294, { KEY_KBDILLUMUP } }, + { KE_IGNORE, 0x295, { KEY_KBDILLUMUP } }, + { KE_END, 0 } +}; + +static int huawei_wmi_micmute_led_set(struct led_classdev *led_cdev, + enum led_brightness brightness) +{ + struct huawei_wmi_priv *priv = dev_get_drvdata(led_cdev->dev->parent); + acpi_status status; + union acpi_object args[3]; + struct acpi_object_list arg_list = { + .pointer = args, + .count = ARRAY_SIZE(args), + }; + + args[0].type = args[1].type = args[2].type = ACPI_TYPE_INTEGER; + args[1].integer.value = 0x04; + + if (strcmp(priv->acpi_method, "SPIN") == 0) { + args[0].integer.value = 0; + args[2].integer.value = brightness ? 1 : 0; + } else if (strcmp(priv->acpi_method, "WPIN") == 0) { + args[0].integer.value = 1; + args[2].integer.value = brightness ? 0 : 1; + } else { + return -EINVAL; + } + + status = acpi_evaluate_object(priv->handle, priv->acpi_method, &arg_list, NULL); + if (ACPI_FAILURE(status)) + return -ENXIO; + + return 0; +} + +static int huawei_wmi_leds_setup(struct wmi_device *wdev) +{ + struct huawei_wmi_priv *priv = dev_get_drvdata(&wdev->dev); + acpi_status status; + + // Skip registering LED subsystem if no ACPI method was found. + status = acpi_get_handle(NULL, "\\_SB.PCI0.LPCB.EC0", &priv->handle); + if (ACPI_FAILURE(status)) + return 0; + + if (acpi_has_method(priv->handle, "SPIN")) + priv->acpi_method = "SPIN"; + else if (acpi_has_method(priv->handle, "WPIN")) + priv->acpi_method = "WPIN"; + else + return 0; + + priv->cdev.name = "platform::micmute"; + priv->cdev.max_brightness = 1; + priv->cdev.brightness_set_blocking = huawei_wmi_micmute_led_set; + priv->cdev.default_trigger = "audio-micmute"; + priv->cdev.brightness = ledtrig_audio_get(LED_AUDIO_MICMUTE); + priv->cdev.dev = &wdev->dev; + priv->cdev.flags = LED_CORE_SUSPENDRESUME; + + return devm_led_classdev_register(&wdev->dev, &priv->cdev); +} + +static void huawei_wmi_process_key(struct wmi_device *wdev, int code) +{ + struct huawei_wmi_priv *priv = dev_get_drvdata(&wdev->dev); + const struct key_entry *key; + + /* + * WMI0 uses code 0x80 to indicate a hotkey event. + * The actual key is fetched from the method WQ00. + */ + if (code == 0x80) { + acpi_status status; + acpi_handle handle; + unsigned long long result; + union acpi_object args[1]; + struct acpi_object_list arg_list = { + .pointer = args, + .count = ARRAY_SIZE(args), + }; + + args[0].type = ACPI_TYPE_INTEGER; + args[0].integer.value = 0; + + status = acpi_get_handle(NULL, "\\WMI0", &handle); + if (ACPI_FAILURE(status)) { + dev_err(&wdev->dev, "Unable to get ACPI handle\n"); + return; + } + + status = acpi_evaluate_integer(NULL, "WQ00", &arg_list, &result); + if (ACPI_FAILURE(status)) { + dev_err(&wdev->dev, "Unable to evaluate ACPI method\n"); + return; + } + + code = result; + } + + key = sparse_keymap_entry_from_scancode(priv->idev, code); + if (!key) { + dev_info(&wdev->dev, "Unknown key pressed, code: 0x%04x\n", code); + return; + } + + sparse_keymap_report_entry(priv->idev, key, 1, true); +} + +static void huawei_wmi_notify(struct wmi_device *wdev, + union acpi_object *obj) +{ + if (obj->type == ACPI_TYPE_INTEGER) + huawei_wmi_process_key(wdev, obj->integer.value); + else + dev_info(&wdev->dev, "Bad response type %d\n", obj->type); +} + +static int huawei_wmi_input_setup(struct wmi_device *wdev) +{ + struct huawei_wmi_priv *priv = dev_get_drvdata(&wdev->dev); + int err; + + priv->idev = devm_input_allocate_device(&wdev->dev); + if (!priv->idev) + return -ENOMEM; + + priv->idev->name = "Huawei WMI hotkeys"; + priv->idev->phys = "wmi/input0"; + priv->idev->id.bustype = BUS_HOST; + priv->idev->dev.parent = &wdev->dev; + + err = sparse_keymap_setup(priv->idev, huawei_wmi_keymap, NULL); + if (err) + return err; + + err = input_register_device(priv->idev); + if (err) + return err; + + return 0; +} + +static int huawei_wmi_probe(struct wmi_device *wdev) +{ + struct huawei_wmi_priv *priv; + int err; + + priv = devm_kzalloc(&wdev->dev, sizeof(struct huawei_wmi_priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + dev_set_drvdata(&wdev->dev, priv); + + err = huawei_wmi_input_setup(wdev); + if (err) + return err; + + err = huawei_wmi_leds_setup(wdev); + if (err) + return err; + + return 0; +} + +static const struct wmi_device_id huawei_wmi_id_table[] = { + { .guid_string = WMI0_EVENT_GUID }, + { .guid_string = AMW0_EVENT_GUID }, + { } +}; + +static struct wmi_driver huawei_wmi_driver = { + .driver = { + .name = "huawei-wmi", + }, + .id_table = huawei_wmi_id_table, + .probe = huawei_wmi_probe, + .notify = huawei_wmi_notify, +}; + +module_wmi_driver(huawei_wmi_driver); + +MODULE_ALIAS("wmi:"WMI0_EVENT_GUID); +MODULE_ALIAS("wmi:"AMW0_EVENT_GUID); +MODULE_AUTHOR("Ayman Bagabas "); +MODULE_DESCRIPTION("Huawei WMI hotkeys"); +MODULE_LICENSE("GPL v2");