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[2604:1380:45e3:2400::1]) by mx.google.com with ESMTPS id mw11-20020a17090b4d0b00b0029c947e11b1si9564216pjb.171.2024.03.18.19.14.32 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 18 Mar 2024 19:14:32 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel+bounces-106909-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:45e3:2400::1 as permitted sender) client-ip=2604:1380:45e3:2400::1; Authentication-Results: mx.google.com; arc=pass (i=1 spf=pass spfdomain=kylinos.cn); spf=pass (google.com: domain of linux-kernel+bounces-106909-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:45e3:2400::1 as permitted sender) smtp.mailfrom="linux-kernel+bounces-106909-linux.lists.archive=gmail.com@vger.kernel.org" Received: from smtp.subspace.kernel.org (wormhole.subspace.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by sv.mirrors.kernel.org (Postfix) with ESMTPS id 4EF942827B7 for ; Tue, 19 Mar 2024 02:14:32 +0000 (UTC) Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 638D964CF2; Tue, 19 Mar 2024 02:14:24 +0000 (UTC) Received: from mailgw.kylinos.cn (mailgw.kylinos.cn [124.126.103.232]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2C1A065189; Tue, 19 Mar 2024 02:14:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=124.126.103.232 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710814463; cv=none; b=reMsthi9mvQDqLXIO5gSgkqKH3dkgft21qfFkW3cfc3+kAA0dmaAKl0BouNwoSoZZojmzClzxV5cmN78CjeN5iNl78RtzdkSmQQIJ2s4xuvLtwODRHiPseZjS1uOxGWbtgZkWxCbp6XMp+C8VcvNF2l8l4s1TLCg5EENp+LrvJg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710814463; c=relaxed/simple; bh=5PhxPno6Az5hNEFMzAydSFMCb7Wy9C/mdppa2A5/YGI=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=F4qOGKxGF2thNvTSJwKVYXH2SaIbI9jyeEZg2mW3Unw72U6LEqJBtggrtEVJcqs457yd2dsSivBTS04cLdU3SCs+yz4DdWi7meee+b3d6/3z/yydi4FVp2jXDpxruqgoiJbkM4haubwnYkFdDpwg1uhK4tfyyD4Pxk5bjr85WH8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=kylinos.cn; spf=pass smtp.mailfrom=kylinos.cn; arc=none smtp.client-ip=124.126.103.232 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=kylinos.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=kylinos.cn X-UUID: 50ca64be3221429db82a129631e8512b-20240319 X-CID-O-RULE: Release_Ham X-CID-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.37,REQID:0b4c6081-8d08-49c8-8e48-bf08d8a41e0f,IP:10, URL:0,TC:0,Content:-5,EDM:0,RT:0,SF:-15,FILE:0,BULK:0,RULE:Release_Ham,ACT ION:release,TS:-10 X-CID-INFO: VERSION:1.1.37,REQID:0b4c6081-8d08-49c8-8e48-bf08d8a41e0f,IP:10,UR L:0,TC:0,Content:-5,EDM:0,RT:0,SF:-15,FILE:0,BULK:0,RULE:Release_Ham,ACTIO N:release,TS:-10 X-CID-META: VersionHash:6f543d0,CLOUDID:18708e90-e2c0-40b0-a8fe-7c7e47299109,B ulkID:240319101411LVHGU11A,BulkQuantity:0,Recheck:0,SF:17|19|44|66|38|24|1 02,TC:nil,Content:0,EDM:-3,IP:-2,URL:0,File:nil,RT:nil,Bulk:nil,QS:nil,BEC :nil,COL:0,OSI:0,OSA:0,AV:0,LES:1,SPR:NO,DKR:0,DKP:0,BRR:0,BRE:0 X-CID-BVR: 0 X-CID-BAS: 0,_,0,_ X-CID-FACTOR: TF_CID_SPAM_SNR,TF_CID_SPAM_FAS,TF_CID_SPAM_FSD,TF_CID_SPAM_FSI X-UUID: 50ca64be3221429db82a129631e8512b-20240319 X-User: aichao@kylinos.cn Received: from localhost.localdomain [(112.64.161.44)] by mailgw (envelope-from ) (Generic MTA) with ESMTP id 676962456; Tue, 19 Mar 2024 10:14:09 +0800 From: Ai Chao To: hdegoede@redhat.com, ilpo.jarvinen@linux.intel.com, linux-kernel@vger.kernel.org, platform-driver-x86@vger.kernel.org Cc: Ai Chao Subject: [PATCH v9] platform/x86: add lenovo wmi camera button driver Date: Tue, 19 Mar 2024 10:14:07 +0800 Message-Id: <20240319021407.15769-1-aichao@kylinos.cn> X-Mailer: git-send-email 2.25.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Add lenovo generic wmi driver to support camera button. The Camera button is a GPIO device. This driver receives ACPI notifyi when the camera button is switched on/off. This driver is used in Lenovo A70, it is a Computer integrated machine. Signed-off-by: Ai Chao --- v9: Add mutex for wmi notify. v8: Dev_deb convert to dev_err. v7: Add dev_dbg and remove unused dev in struct. v6: Modify SW_CAMERA_LENS_COVER to KEY_CAMERA_ACCESS_ENABLE/KEY_CAMERA_ACCESS_DISABLE. v5: Remove camera button groups, modify KEY_CAMERA to SW_CAMERA_LENS_COVER. v4: Remove lenovo_wmi_input_setup, move camera_mode into struct lenovo_wmi_priv. v3: Remove lenovo_wmi_remove function. v2: Adjust GPL v2 to GPL, adjust sprintf to sysfs_emit. drivers/platform/x86/Kconfig | 12 +++ drivers/platform/x86/Makefile | 1 + drivers/platform/x86/lenovo-wmi-camera.c | 112 +++++++++++++++++++++++ 3 files changed, 125 insertions(+) create mode 100644 drivers/platform/x86/lenovo-wmi-camera.c diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig index bdd302274b9a..9506a455b547 100644 --- a/drivers/platform/x86/Kconfig +++ b/drivers/platform/x86/Kconfig @@ -1001,6 +1001,18 @@ config INSPUR_PLATFORM_PROFILE To compile this driver as a module, choose M here: the module will be called inspur-platform-profile. +config LENOVO_WMI_CAMERA + tristate "Lenovo WMI Camera Button driver" + depends on ACPI_WMI + depends on INPUT + help + This driver provides support for Lenovo camera button. The Camera + button is a GPIO device. This driver receives ACPI notify when the + camera button is switched on/off. + + To compile this driver as a module, choose M here: the module + will be called lenovo-wmi-camera. + source "drivers/platform/x86/x86-android-tablets/Kconfig" config FW_ATTR_CLASS diff --git a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makefile index 1de432e8861e..217e94d7c877 100644 --- a/drivers/platform/x86/Makefile +++ b/drivers/platform/x86/Makefile @@ -66,6 +66,7 @@ obj-$(CONFIG_SENSORS_HDAPS) += hdaps.o obj-$(CONFIG_THINKPAD_ACPI) += thinkpad_acpi.o obj-$(CONFIG_THINKPAD_LMI) += think-lmi.o obj-$(CONFIG_YOGABOOK) += lenovo-yogabook.o +obj-$(CONFIG_LENOVO_WMI_CAMERA) += lenovo-wmi-camera.o # Intel obj-y += intel/ diff --git a/drivers/platform/x86/lenovo-wmi-camera.c b/drivers/platform/x86/lenovo-wmi-camera.c new file mode 100644 index 000000000000..820a52588caf --- /dev/null +++ b/drivers/platform/x86/lenovo-wmi-camera.c @@ -0,0 +1,112 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Lenovo WMI Camera Button Driver + * + * Author: Ai Chao + * Copyright (C) 2024 KylinSoft Corporation. + */ + +#include +#include +#include +#include +#include +#include + +#define WMI_LENOVO_CAMERABUTTON_EVENT_GUID "50C76F1F-D8E4-D895-0A3D-62F4EA400013" + +struct lenovo_wmi_priv { + struct input_dev *idev; + struct mutex notify_lock; /* lenovo wmi notify lock */ +}; + +enum { + SW_CAMERA_OFF = 0, + SW_CAMERA_ON = 1, +}; + +static void lenovo_wmi_notify(struct wmi_device *wdev, union acpi_object *obj) +{ + struct lenovo_wmi_priv *priv = dev_get_drvdata(&wdev->dev); + unsigned int keycode; + u8 camera_mode; + + mutex_lock(&priv->notify_lock); + if (obj->type != ACPI_TYPE_BUFFER) { + dev_err(&wdev->dev, "Bad response type %u\n", obj->type); + goto out_unlock; + } + + if (obj->buffer.length != 1) { + dev_err(&wdev->dev, "Invalid buffer length %u\n", obj->buffer.length); + goto out_unlock; + } + + /* obj->buffer.pointer[0] is camera mode: + * 0 camera close + * 1 camera open + */ + camera_mode = obj->buffer.pointer[0]; + if (camera_mode > SW_CAMERA_ON) { + dev_err(&wdev->dev, "Unknown camera mode %u\n", camera_mode); + goto out_unlock; + } + + keycode = (camera_mode == SW_CAMERA_ON ? + KEY_CAMERA_ACCESS_ENABLE : KEY_CAMERA_ACCESS_DISABLE); + input_report_key(priv->idev, keycode, 1); + input_sync(priv->idev); + input_report_key(priv->idev, keycode, 0); + input_sync(priv->idev); + +out_unlock: + mutex_unlock(&priv->notify_lock); +} + +static int lenovo_wmi_probe(struct wmi_device *wdev, const void *context) +{ + struct lenovo_wmi_priv *priv; + + priv = devm_kzalloc(&wdev->dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + dev_set_drvdata(&wdev->dev, priv); + + mutex_init(&priv->notify_lock); + priv->idev = devm_input_allocate_device(&wdev->dev); + if (!priv->idev) + return -ENOMEM; + + priv->idev->name = "Lenovo WMI Camera Button"; + priv->idev->phys = "wmi/input0"; + priv->idev->id.bustype = BUS_HOST; + priv->idev->dev.parent = &wdev->dev; + input_set_capability(priv->idev, EV_KEY, KEY_CAMERA_ACCESS_ENABLE); + input_set_capability(priv->idev, EV_KEY, KEY_CAMERA_ACCESS_DISABLE); + + return input_register_device(priv->idev); +} + +static const struct wmi_device_id lenovo_wmi_id_table[] = { + { .guid_string = WMI_LENOVO_CAMERABUTTON_EVENT_GUID }, + { } +}; + +static struct wmi_driver lenovo_wmi_driver = { + .driver = { + .name = "lenovo-wmi-camera", + .probe_type = PROBE_PREFER_ASYNCHRONOUS, + }, + .id_table = lenovo_wmi_id_table, + .no_singleton = true, + .probe = lenovo_wmi_probe, + .notify = lenovo_wmi_notify, +}; + +module_wmi_driver(lenovo_wmi_driver); + +MODULE_DEVICE_TABLE(wmi, lenovo_wmi_id_table); +MODULE_AUTHOR("Ai Chao "); +MODULE_DESCRIPTION("Lenovo WMI Camera Button Driver"); +MODULE_LICENSE("GPL"); -- 2.25.1