From patchwork Thu Feb 29 05:16:21 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ai Chao X-Patchwork-Id: 13576465 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 7DB27383BE; Thu, 29 Feb 2024 05:16:30 +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=1709183796; cv=none; b=d2A0QGr4iAuk2Pj9pjmnpcYO646ndebo978/+BSbcUKwC6QXnSBs1FpWYoKkbjRaqg+IPKHCTmCVzV2OS4hHgeCpqDADKCYk60A7wK6dhzOd+j3LYlQED8rqG4vX8xGOb66G1XVTSVuGqLzHZQ/esorY/BNM3fvir7623hZSRh4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709183796; c=relaxed/simple; bh=t3j1woEgvFnLc8x11g+kBPBzZ/jeWchNm0SifGt5RgQ=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=WCmdME/qRXKMc6KHaMfRdmj0HM1vdhwNWIEIi3jV402G40AN44fuIgDEVk1AkrgkucmddARErsIMvaJjJ8H0firwyC+kZ80h3Iim7eqlKYW9rKw8DFy+AZl+eBk8dqB5/wq97ThhbTIwvt7YjX4bMhW5851hP8FHisfUJ3LngWg= 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: d08d34d4130e45a8a69a80c8dd358203-20240229 X-CID-O-RULE: Release_Ham X-CID-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.37,REQID:9f5ee081-2332-4efc-8847-62d1591c6024,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:9f5ee081-2332-4efc-8847-62d1591c6024,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:888d54ff-c16b-4159-a099-3b9d0558e447,B ulkID:240229131626BIG1UWI7,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,NGT X-CID-BAS: 0,NGT,0,_ X-CID-FACTOR: TF_CID_SPAM_SNR,TF_CID_SPAM_FAS,TF_CID_SPAM_FSD,TF_CID_SPAM_FSI X-UUID: d08d34d4130e45a8a69a80c8dd358203-20240229 X-User: aichao@kylinos.cn Received: from localhost.localdomain [(112.64.161.44)] by mailgw (envelope-from ) (Generic MTA) with ESMTP id 724790857; Thu, 29 Feb 2024 13:16:23 +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] platform/x86: add lenovo generic wmi driver Date: Thu, 29 Feb 2024 13:16:21 +0800 Message-Id: <20240229051621.12341-1-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. Signed-off-by: Ai Chao --- drivers/platform/x86/Kconfig | 10 +++ drivers/platform/x86/Makefile | 1 + drivers/platform/x86/lenovo-wmi.c | 121 ++++++++++++++++++++++++++++++ 3 files changed, 132 insertions(+) create mode 100644 drivers/platform/x86/lenovo-wmi.c diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig index bdd302274b9a..fbbb8fb843d7 100644 --- a/drivers/platform/x86/Kconfig +++ b/drivers/platform/x86/Kconfig @@ -1001,6 +1001,16 @@ 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 + tristate "Lenovo Geneirc WMI driver" + depends on ACPI_WMI + depends on INPUT + help + This driver provides support for Lenovo WMI driver. + + To compile this driver as a module, choose M here: the module + will be called lenovo-wmi. + 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..d51086552192 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) += lenovo-wmi.o # Intel obj-y += intel/ diff --git a/drivers/platform/x86/lenovo-wmi.c b/drivers/platform/x86/lenovo-wmi.c new file mode 100644 index 000000000000..e8b1c401b53e --- /dev/null +++ b/drivers/platform/x86/lenovo-wmi.c @@ -0,0 +1,121 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Lenovo Generic WMI Driver + * + * Copyright (C) 2018 Ai Chao + */ + +#include +#include +#include +#include +#include + +#define WMI_LENOVO_CAMERABUTTON_EVENT_GUID "50C76F1F-D8E4-D895-0A3D-62F4EA400013" + +static u8 camera_mode; + +struct lenovo_wmi_priv { + struct input_dev *idev; +}; + +static ssize_t camerabutton_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return sprintf(buf, "%u\n", camera_mode); +} + +DEVICE_ATTR_RO(camerabutton); + +static struct attribute *lenovo_wmi_attrs[] = { + &dev_attr_camerabutton.attr, + NULL, +}; + +static const struct attribute_group lenovo_wmi_group = { + .attrs = lenovo_wmi_attrs, +}; + +const struct attribute_group *lenovo_wmi_groups[] = { + &lenovo_wmi_group, + NULL, +}; + +static void lenovo_wmi_notify(struct wmi_device *wdev, union acpi_object *obj) +{ + struct lenovo_wmi_priv *priv = dev_get_drvdata(&wdev->dev); + + if (obj->type == ACPI_TYPE_BUFFER) { + camera_mode = obj->buffer.pointer[0]; + input_report_key(priv->idev, KEY_CAMERA, 1); + input_sync(priv->idev); + input_report_key(priv->idev, KEY_CAMERA, 0); + input_sync(priv->idev); + } else { + dev_info(&wdev->dev, "Bad response type %d\n", obj->type); + } +} + +static int lenovo_wmi_input_setup(struct wmi_device *wdev) +{ + struct lenovo_wmi_priv *priv = dev_get_drvdata(&wdev->dev); + + 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; + priv->idev->evbit[0] = BIT_MASK(EV_KEY); + priv->idev->keybit[BIT_WORD(KEY_CAMERA)] = BIT_MASK(KEY_CAMERA); + + return input_register_device(priv->idev); +} + +static int lenovo_wmi_probe(struct wmi_device *wdev, const void *context) +{ + struct lenovo_wmi_priv *priv; + int err; + + priv = devm_kzalloc(&wdev->dev, sizeof(struct lenovo_wmi_priv), + GFP_KERNEL); + if (!priv) + return -ENOMEM; + + dev_set_drvdata(&wdev->dev, priv); + + err = lenovo_wmi_input_setup(wdev); + return err; +} + +static void lenovo_wmi_remove(struct wmi_device *wdev) +{ + struct lenovo_wmi_priv *priv = dev_get_drvdata(&wdev->dev); + + input_unregister_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", + .dev_groups = lenovo_wmi_groups, + }, + .id_table = lenovo_wmi_id_table, + .probe = lenovo_wmi_probe, + .notify = lenovo_wmi_notify, + .remove = lenovo_wmi_remove, +}; + +module_wmi_driver(lenovo_wmi_driver); + +MODULE_DEVICE_TABLE(wmi, lenovo_wmi_id_table); +MODULE_AUTHOR("Ai Chao "); +MODULE_DESCRIPTION("Lenovo Generic WMI Driver"); +MODULE_LICENSE("GPL v2");