From patchwork Sat Oct 14 03:28:44 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ai Chao X-Patchwork-Id: 13421894 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 909B1CDB47E for ; Sat, 14 Oct 2023 03:29:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229958AbjJND3D (ORCPT ); Fri, 13 Oct 2023 23:29:03 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46508 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229518AbjJND3C (ORCPT ); Fri, 13 Oct 2023 23:29:02 -0400 Received: from mailgw.kylinos.cn (mailgw.kylinos.cn [124.126.103.232]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8F9BFC0; Fri, 13 Oct 2023 20:28:58 -0700 (PDT) X-UUID: bb6b3defdbf7419c90c7d3bc44c3da64-20231014 X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.32,REQID:c558d7f0-915c-41bc-b38f-8bca20620a3b,IP:5,U RL:0,TC:0,Content:-25,EDM:0,RT:0,SF:-15,FILE:0,BULK:0,RULE:Release_Ham,ACT ION:release,TS:-35 X-CID-INFO: VERSION:1.1.32,REQID:c558d7f0-915c-41bc-b38f-8bca20620a3b,IP:5,URL :0,TC:0,Content:-25,EDM:0,RT:0,SF:-15,FILE:0,BULK:0,RULE:Release_Ham,ACTIO N:release,TS:-35 X-CID-META: VersionHash:5f78ec9,CLOUDID:7cd51bc4-1e57-4345-9d31-31ad9818b39f,B ulkID:231014112849SB64LA8R,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,Bulk:nil,QS:nil,BEC:nil,CO L: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_FAS,TF_CID_SPAM_FSD,TF_CID_SPAM_FSI,TF_CID_SPAM_SNR X-UUID: bb6b3defdbf7419c90c7d3bc44c3da64-20231014 X-User: aichao@kylinos.cn Received: from localhost.localdomain [(112.64.161.44)] by mailgw (envelope-from ) (Generic MTA) with ESMTP id 2130785070; Sat, 14 Oct 2023 11:28:47 +0800 From: Ai Chao To: hdegoede@redhat.com, ilpo.jarvinen@linux.intel.com, markgross@kernel.org Cc: linux-kernel@vger.kernel.org, platform-driver-x86@vger.kernel.org, Ai Chao Subject: [PATCH v2] platform/x86: support to store/show powermode value for Inspur Date: Sat, 14 Oct 2023 11:28:44 +0800 Message-Id: <20231014032844.3823198-1-aichao@kylinos.cn> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: platform-driver-x86@vger.kernel.org Support to store/show powermode value for Inspur by WMI interface. This driver provides support for Inspur WMI hotkeys. User used Fn+Q to change the power mode. If desktop applications receive hotkey(Fn+Q) event, then it get the currently power mode and change the power mode. The desktop applications modify brightness and cpufreq based on power mode. change for v2 - Remove Event GUID, remove inspur_wmi_notify and inspur_wmi_notify. - Add more explanation. Signed-off-by: Ai Chao --- drivers/platform/x86/Kconfig | 14 ++ drivers/platform/x86/Makefile | 3 + drivers/platform/x86/inspur-wmi.c | 210 ++++++++++++++++++++++++++++++ 3 files changed, 227 insertions(+) create mode 100644 drivers/platform/x86/inspur-wmi.c diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig index 2a1070543391..fa2a4335c83d 100644 --- a/drivers/platform/x86/Kconfig +++ b/drivers/platform/x86/Kconfig @@ -988,6 +988,20 @@ config TOUCHSCREEN_DMI the OS-image for the device. This option supplies the missing info. Enable this for x86 tablets with Silead or Chipone touchscreens. +config INSPUR_WMI + tristate "Inspur WMI hotkeys driver" + depends on ACPI_WMI + depends on INPUT + help + This driver provides support for Inspur WMI hotkeys. + User used Fn+Q to change the power mode. If desktop applications + receive hotkeys(Fn+Q) event, then it get the currently power mode + and change the power mode. The desktop applications modify brightness + and cpufreq based on power mode. + + To compile this driver as a module, choose M here: the module + will be called inspur-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 b457de5abf7d..9285c252757e 100644 --- a/drivers/platform/x86/Makefile +++ b/drivers/platform/x86/Makefile @@ -98,6 +98,9 @@ obj-$(CONFIG_TOSHIBA_WMI) += toshiba-wmi.o # before toshiba_acpi initializes obj-$(CONFIG_ACPI_TOSHIBA) += toshiba_acpi.o +# Inspur +obj-$(CONFIG_INSPUR_WMI) += inspur-wmi.o + # Laptop drivers obj-$(CONFIG_ACPI_CMPC) += classmate-laptop.o obj-$(CONFIG_COMPAL_LAPTOP) += compal-laptop.o diff --git a/drivers/platform/x86/inspur-wmi.c b/drivers/platform/x86/inspur-wmi.c new file mode 100644 index 000000000000..ef6cfd87f074 --- /dev/null +++ b/drivers/platform/x86/inspur-wmi.c @@ -0,0 +1,210 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Inspur WMI hotkeys + * + * Copyright (C) 2018 Ai Chao + */ + +#include +#include +#include +#include +#include + +#define WMI_INSPUR_POWERMODE_BIOS_GUID "596C31E3-332D-43C9-AEE9-585493284F5D" + +enum inspur_wmi_method_ids { + INSPUR_WMI_GET_POWERMODE = 0x02, + INSPUR_WMI_SET_POWERMODE = 0x03, +}; + +struct inspur_wmi_priv { + struct input_dev *idev; + struct wmi_device *wdev; +}; + +static int inspur_wmi_perform_query(struct wmi_device *wdev, + enum inspur_wmi_method_ids query_id, + void *buffer, size_t insize, + size_t outsize) +{ + union acpi_object *obj; + acpi_status status; + int ret = 0; + struct acpi_buffer input = { insize, buffer}; + struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; + + status = wmidev_evaluate_method(wdev, 0, query_id, &input, &output); + if (ACPI_FAILURE(status)) { + dev_err(&wdev->dev, "EC Powermode control failed: %s\n", + acpi_format_exception(status)); + return -EIO; + } + + obj = output.pointer; + if (!obj) + return -EINVAL; + + if (obj->type != ACPI_TYPE_BUFFER) { + ret = -EINVAL; + goto out_free; + } + + /* Ignore output data of zero size */ + if (!outsize) + goto out_free; + + if (obj->buffer.length != outsize) { + ret = -EINVAL; + goto out_free; + } + + memcpy(buffer, obj->buffer.pointer, obj->buffer.length); + +out_free: + kfree(obj); + return ret; +} + +/** + * Set Power Mode to EC RAM. If Power Mode value greater than 0x3, + * return error + * Method ID: 0x3 + * Arg: 4 Bytes + * Byte [0]: Power Mode: + * 0x0: Balance Mode + * 0x1: Performance Mode + * 0x2: Power Saver Mode + * Return Value: 4 Bytes + * Byte [0]: Return Code + * 0x0: No Error + * 0x1: Error + */ +static ssize_t powermode_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct inspur_wmi_priv *priv = dev_get_drvdata(dev); + int ret; + u32 mode; + u8 *ret_code; + + ret = kstrtoint(buf, 0, &mode); + if (ret) + return ret; + + ret = inspur_wmi_perform_query(priv->wdev, + INSPUR_WMI_SET_POWERMODE, + &mode, sizeof(mode), sizeof(mode)); + + if (ret < 0) + return ret; + + ret_code = (u8 *)(&mode); + if (ret_code[0]) + return -EBADRQC; + + return count; +} + +/** + * Get Power Mode from EC RAM, If Power Mode value greater than 0x3, + * return error + * Method ID: 0x2 + * Return Value: 4 Bytes + * Byte [0]: Return Code + * 0x0: No Error + * 0x1: Error + * Byte [1]: Power Mode + * 0x0: Balance Mode + * 0x1: Performance Mode + * 0x2: Power Saver Mode + */ +static ssize_t powermode_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct inspur_wmi_priv *priv = dev_get_drvdata(dev); + u32 mode = 0; + int ret; + u8 *ret_code; + + ret = inspur_wmi_perform_query(priv->wdev, + INSPUR_WMI_GET_POWERMODE, + &mode, sizeof(mode), sizeof(mode)); + if (ret < 0) + return ret; + + ret_code = (u8 *)(&mode); + if (ret_code[0]) + return -EBADRQC; + + return sprintf(buf, "%u\n", ret_code[1]); +} + +static DEVICE_ATTR_RW(powermode); + +static struct attribute *inspur_wmi_attrs[] = { + &dev_attr_powermode.attr, + NULL, +}; + +static const struct attribute_group inspur_wmi_group = { + .attrs = inspur_wmi_attrs, +}; + +static const struct attribute_group *inspur_wmi_groups[] = { + &inspur_wmi_group, + NULL, +}; + +static int inspur_wmi_input_setup(struct wmi_device *wdev) +{ + struct inspur_wmi_priv *priv = dev_get_drvdata(&wdev->dev); + + priv->idev = devm_input_allocate_device(&wdev->dev); + if (!priv->idev) + return -ENOMEM; + + priv->idev->name = "Inspur WMI hotkeys"; + priv->idev->phys = "wmi/input0"; + priv->idev->id.bustype = BUS_HOST; + priv->idev->dev.parent = &wdev->dev; + + return input_register_device(priv->idev); +} + +static int inspur_wmi_probe(struct wmi_device *wdev, const void *context) +{ + struct inspur_wmi_priv *priv; + + priv = devm_kzalloc(&wdev->dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->wdev = wdev; + dev_set_drvdata(&wdev->dev, priv); + + return inspur_wmi_input_setup(wdev); +} + +static const struct wmi_device_id inspur_wmi_id_table[] = { + { .guid_string = WMI_INSPUR_POWERMODE_BIOS_GUID }, + { } +}; + +static struct wmi_driver inspur_wmi_driver = { + .driver = { + .name = "inspur-wmi", + .dev_groups = inspur_wmi_groups, + }, + .id_table = inspur_wmi_id_table, + .probe = inspur_wmi_probe, +}; + +module_wmi_driver(inspur_wmi_driver); + +MODULE_DEVICE_TABLE(wmi, inspur_wmi_id_table); +MODULE_AUTHOR("Ai Chao "); +MODULE_DESCRIPTION("Inspur WMI hotkeys"); +MODULE_LICENSE("GPL");