From patchwork Thu Mar 14 01:57:11 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ai Chao X-Patchwork-Id: 13592044 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 4C09346B5; Thu, 14 Mar 2024 01:57:29 +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=1710381455; cv=none; b=ayCzln7wLY8gxBS9aLb6wuenTx3V2drhXRlsIpAdkillkMi2ZntI9bAH+1dLRkBSbsGQsJSMmqrmZQAml6dBiQsRoILo00pkVHFdkxYvvfj43oCq4++dNfOO8Op8scAc6F6TG22bC+HOOiqIzy/bj7ZyYlGOSaGxOPvpvokhEl8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710381455; c=relaxed/simple; bh=T9gpuNMpq9UU15JKOLISdZH4W+VgL6cQXt3cXyCQ+90=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=J7JPteeNQbyRh8Xy2dAgsdoHmMCg4+wcvmwY7JQ8hmRYdUTjUmJc1DsxlWXjkpQxNAMZm0seCIdtHY3olDTSMlvND76iIEJxCEgu5X/Gmt7VwKp4puVGsVMJMmEMNQbswjHYr8i+2TuchHCo+yTHU9PYMVq6/hKw8mXbEhky2tQ= 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: 884f110930c94cf48d08e0515ba12720-20240314 X-CID-O-RULE: Release_Ham X-CID-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.37,REQID:88922ec1-cbb7-41df-b58d-6bfb1f21b071,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:88922ec1-cbb7-41df-b58d-6bfb1f21b071,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:21bc7981-4f93-4875-95e7-8c66ea833d57,B ulkID:240314095720TCR1FRGZ,BulkQuantity:0,Recheck:0,SF:66|38|24|17|19|44|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: 884f110930c94cf48d08e0515ba12720-20240314 X-User: aichao@kylinos.cn Received: from localhost.localdomain [(112.64.161.44)] by mailgw (envelope-from ) (Generic MTA) with ESMTP id 2095711009; Thu, 14 Mar 2024 09:57:19 +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 v7] platform/x86: add lenovo wmi camera button driver Date: Thu, 14 Mar 2024 09:57:11 +0800 Message-Id: <20240314015711.62433-1-aichao@kylinos.cn> X-Mailer: git-send-email 2.25.1 Precedence: bulk X-Mailing-List: platform-driver-x86@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 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 --- 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 | 108 +++++++++++++++++++++++ 3 files changed, 121 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..c11a74d04bf9 --- /dev/null +++ b/drivers/platform/x86/lenovo-wmi-camera.c @@ -0,0 +1,108 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Lenovo WMI Camera Button Driver + * + * Author: Ai Chao + * Copyright (C) 2024 KylinSoft Corporation. + */ + +#include +#include +#include +#include +#include + +#define WMI_LENOVO_CAMERABUTTON_EVENT_GUID "50C76F1F-D8E4-D895-0A3D-62F4EA400013" + +struct lenovo_wmi_priv { + struct input_dev *idev; +}; + +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); + u8 camera_mode; + + if (obj->type != ACPI_TYPE_BUFFER) { + dev_dbg(&wdev->dev, "Bad response type %u\n", obj->type); + return; + } + + if (obj->buffer.length != 1) { + dev_dbg(&wdev->dev, "Invalid buffer length %u\n", obj->buffer.length); + return; + } + + /* 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_dbg(&wdev->dev, "Unknown camera mode %u\n", camera_mode); + return; + } + + if (camera_mode == SW_CAMERA_ON) { + input_report_key(priv->idev, KEY_CAMERA_ACCESS_ENABLE, 1); + input_sync(priv->idev); + input_report_key(priv->idev, KEY_CAMERA_ACCESS_ENABLE, 0); + } else { + input_report_key(priv->idev, KEY_CAMERA_ACCESS_DISABLE, 1); + input_sync(priv->idev); + input_report_key(priv->idev, KEY_CAMERA_ACCESS_DISABLE, 0); + } + input_sync(priv->idev); +} + +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); + + 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");