From patchwork Tue Dec 11 06:01:21 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ayman Bagabas X-Patchwork-Id: 10723117 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 024736C5 for ; Tue, 11 Dec 2018 06:02:40 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E55522A84E for ; Tue, 11 Dec 2018 06:02:39 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id D97862A861; Tue, 11 Dec 2018 06:02:39 +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 1D3BF2A84E for ; Tue, 11 Dec 2018 06:02:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729282AbeLKGC0 (ORCPT ); Tue, 11 Dec 2018 01:02:26 -0500 Received: from mail-vk1-f194.google.com ([209.85.221.194]:41856 "EHLO mail-vk1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726720AbeLKGCZ (ORCPT ); Tue, 11 Dec 2018 01:02:25 -0500 Received: by mail-vk1-f194.google.com with SMTP id t127so3109901vke.8; Mon, 10 Dec 2018 22:02:23 -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=Dcfykby5/xDTBkL/NuSdHQAku283KnFXJQ0U4+ajSNg=; b=kIEE+PvVixL09ReRpAd++QVdnV33X98roiCtxAIat4KeLH083a78iKRj92Kofzwvev j9eGyf+i+kHVpU4QNIHH3UuHbcj61d5SIL/0GQHs7Ow/7q30j6EaZtl7vx0EsaJ/Ywhl SzSCmZZU1ceSZZlxvxz6uVJY0bbigQcvE2jqaB2ISgfQWRDWU83oxETzGtLMSIF8WlLf ghx8pNEnmDieGAU4ppVZ0WkNsoMvxVxtmkaxGg3l2tY37L0wKvJS17xL4SuMDM8Wo5VB JvZsRqd9cSA8/WPYB/EkHOj3YDyANBpZD5Yds9iKCYtDPn6uswNyRT50nCW2DeMa3btr l/lQ== 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=Dcfykby5/xDTBkL/NuSdHQAku283KnFXJQ0U4+ajSNg=; b=o+37x626Ec3OPdMgCCK+kiKN/gdGY75uWLszypHR55y5jL3QVVK7+NFez5EeVrn/Vi HPes5z5aPZh8ENXf1VBy3mwPzCs2ReelCXHIhMBp5wNOS9DkYVYpu4xfksuPybew0Pi8 cJdICyKyrlQiqlrOeLpLalUuFi1lSVoV1Oywnq3nzleT+Qg7zI7HQL2waFq4X6m3S16M DkJQ7GNmJjBas+cCH85xjeidwbiFyyCqy137BM1RvDnadTVTg5o8HI6fcIBQDchRrwCo Z/6vE6Dz/IPN1EwodJ+5SgdEEucyRtGY9swYniNI+PFy3zxD76oQ/EfwLWuipFe3nes1 FcKQ== X-Gm-Message-State: AA+aEWbmhiIyT4/qwqFjhw3AEIFJwfBPPjtN1ylY2bc+LnW4UsILxCWV MyCQnxbH8aViTNkB/2N2qQ== X-Google-Smtp-Source: AFSGD/VZtRWRMvsrpuTiF8ltQwqQbvs3LF6QPAKFvfdWtYZvHmKbrXDek6v9HoXlyXf+zrXhJemW+g== X-Received: by 2002:a1f:2cb:: with SMTP id 194mr6715543vkc.19.1544508142416; Mon, 10 Dec 2018 22:02:22 -0800 (PST) Received: from localhost.localdomain ([2601:902:c200:6512:a50b:fc5d:3604:d966]) by smtp.gmail.com with ESMTPSA id a137sm5700765vsd.24.2018.12.10.22.02.21 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Mon, 10 Dec 2018 22:02:22 -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 v10 2/3] x86: add support for Huawei WMI hotkeys. Date: Tue, 11 Dec 2018 01:01:21 -0500 Message-Id: <20181211060125.28671-3-ayman.bagabas@gmail.com> X-Mailer: git-send-email 2.19.2 In-Reply-To: <20181211060125.28671-1-ayman.bagabas@gmail.com> References: <20181211060125.28671-1-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. Reviewed-by: Takashi Iwai Signed-off-by: Ayman Bagabas Acked-by: Andy Shevchenko Reviewed-by: Andy Shevchenko --- drivers/platform/x86/Kconfig | 17 +++ drivers/platform/x86/Makefile | 1 + drivers/platform/x86/huawei-wmi.c | 220 ++++++++++++++++++++++++++++++ 3 files changed, 238 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..89ba7ea33499 --- /dev/null +++ b/drivers/platform/x86/huawei-wmi.c @@ -0,0 +1,220 @@ +// 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); + acpi_status status; + + /* Skip registering LED subsystem if no ACPI method was found. + * ec_get_handle() returns the first embedded controller device + * handle which then used to locate SPIN and WPIN methods. + */ + 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; + + 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");