From patchwork Wed Dec 12 23:07:58 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ayman Bagabas X-Patchwork-Id: 10727367 X-Patchwork-Delegate: andy.shevchenko@gmail.com 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 8C6D618A7 for ; Wed, 12 Dec 2018 23:08:18 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 7DBBD29F4E for ; Wed, 12 Dec 2018 23:08:18 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 722362B1FB; Wed, 12 Dec 2018 23:08:18 +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=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FROM,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9F4122B1DF for ; Wed, 12 Dec 2018 23:08:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728513AbeLLXIR (ORCPT ); Wed, 12 Dec 2018 18:08:17 -0500 Received: from mail-vs1-f67.google.com ([209.85.217.67]:45131 "EHLO mail-vs1-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726214AbeLLXIQ (ORCPT ); Wed, 12 Dec 2018 18:08:16 -0500 Received: by mail-vs1-f67.google.com with SMTP id v10so56672vsv.12; Wed, 12 Dec 2018 15:08:15 -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=Jm6Nl4C+10Z6mLAxjDzoOgqz94ccGPGmCa7Vfusa0Os=; b=SA4EE91Gra3MVlYhasbeU10uGxQdJkA1ErpgUUPHXYjIBBC9G+xhF0GdmzxZwuV9mo z3IFasx1Q+LMnp7rpNXL5hxwIIB2F1n5Wxt9XrBA4UQ+751T4p1Qeul0eHS6KCHU2t7W Ku3HSPt2p/IYUi0P/2k8hx2jpEscTZNwTX/wzAdqqgDLSNL0aIHzSh3/W2sH8ef1IFuY c/HZENmiu0xT1koA5h4GxBYxGweiuCNhz15CQqePyiGHbt3ATJDeVxJEOOjJi6iP7jkd rBNkG+mMZjfvMwNnFQwyhWHcAAR1Gp/6AVnGFopARlnDmlUGwFwi12OOjcomLsM3gNdw JGnA== 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=Jm6Nl4C+10Z6mLAxjDzoOgqz94ccGPGmCa7Vfusa0Os=; b=payOGFN9bYR9ShgX9KJdnAtuKtw9cnG85nWDe9JtuUXrTqcl+RVPmH45Nbk7RY3m3f AzWTmyFMR0rmNAKLaDEMQuD79kpSrFA7aKHXxZ33mtCtXGftIKQYv43k90IljxqlysUh E56UWbpqVhsFTSgoNOoBaXPP7M0uCPUwWgbi9bc82mDBiS4l7wQaZudKNmXgpsMv4zXI dRs052OT6895ZN9W400bGIwx5UQH/YwXOOLWfTDQaZDF3wPmBAm4CVQKoBYmxrbpRkWJ GXkn/10qKCINTnX+IUJFtpld/ODUmJQalCTK51/5B1sCsU1n/6LTC+4CmKYsGMyfGo+6 DiDg== X-Gm-Message-State: AA+aEWaK0zsiXmR16mKho19SEUgqLyOtB2bPRUq3qrERans/ldzlDRbi ubqYNGZuTktUny26hTva9w== X-Google-Smtp-Source: AFSGD/VFrBVRw3dCcimcwqFKEuaGBGFGTzSlK7Q867zq6BrbWaWUvdLijYID0YXYwA9DzrHzHwcryg== X-Received: by 2002:a67:c584:: with SMTP id h4mr10032498vsk.142.1544656094007; Wed, 12 Dec 2018 15:08:14 -0800 (PST) Received: from localhost.localdomain ([2601:902:c200:6512:a50b:fc5d:3604:d966]) by smtp.gmail.com with ESMTPSA id f68sm36630uaf.9.2018.12.12.15.08.12 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Wed, 12 Dec 2018 15:08:13 -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 Cc: ayman.bagabas@gmail.com Subject: [PATCH v11 2/3] x86: add support for Huawei WMI hotkeys. Date: Wed, 12 Dec 2018 18:07:58 -0500 Message-Id: <20181212230802.21140-3-ayman.bagabas@gmail.com> X-Mailer: git-send-email 2.19.2 In-Reply-To: <20181212230802.21140-1-ayman.bagabas@gmail.com> References: <20181212230802.21140-1-ayman.bagabas@gmail.com> MIME-Version: 1.0 Sender: platform-driver-x86-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: platform-driver-x86@vger.kernel.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. Acked-by: Andy Shevchenko Reviewed-by: Takashi Iwai Signed-off-by: Ayman Bagabas --- drivers/platform/x86/Kconfig | 17 +++ drivers/platform/x86/Makefile | 1 + drivers/platform/x86/huawei-wmi.c | 208 ++++++++++++++++++++++++++++++ 3 files changed, 226 insertions(+) create mode 100644 drivers/platform/x86/huawei-wmi.c diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig index 87f70e8f4dd0..45ef4d22f14c 100644 --- a/drivers/platform/x86/Kconfig +++ b/drivers/platform/x86/Kconfig @@ -1292,6 +1292,23 @@ 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 + select NEW_LEDS + 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..59872f87b741 --- /dev/null +++ b/drivers/platform/x86/huawei-wmi.c @@ -0,0 +1,208 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Huawei WMI hotkeys + * + * Copyright (C) 2018 Ayman Bagabas + */ + +#include +#include +#include +#include +#include +#include + +/* + * Huawei WMI GUIDs + */ +#define WMI0_EVENT_GUID "59142400-C6A3-40fa-BADB-8A2652834100" +#define AMW0_EVENT_GUID "ABBC0F5C-8EA1-11D1-A000-C90629100000" + +#define WMI0_EXPENSIVE_GUID "39142400-C6A3-40fa-BADB-8A2652834100" + +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| key + { KE_KEY, 0x28a, { KEY_CONFIG } }, + // Keyboard backlight + { 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); + + priv->handle = ec_get_handle(); + if (!priv->handle) + 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 + * using WMI0_EXPENSIVE_GUID. + */ + if (code == 0x80) { + struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL }; + union acpi_object *obj; + acpi_status status; + + status = wmi_query_block(WMI0_EXPENSIVE_GUID, 0, &response); + if (ACPI_FAILURE(status)) + return; + + obj = (union acpi_object *)response.pointer; + if (obj && obj->type == ACPI_TYPE_INTEGER) + code = obj->integer.value; + + kfree(response.pointer); + } + + 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; + + return input_register_device(priv->idev); +} + +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; + + return huawei_wmi_leds_setup(wdev); +} + +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");