From mboxrd@z Thu Jan 1 00:00:00 1970 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 2D7FAC64ED6 for ; Mon, 27 Feb 2023 02:09:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230309AbjB0CI7 (ORCPT ); Sun, 26 Feb 2023 21:08:59 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59448 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230169AbjB0CI2 (ORCPT ); Sun, 26 Feb 2023 21:08:28 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0E80E1ABD9; Sun, 26 Feb 2023 18:07:31 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id E380B60C87; Mon, 27 Feb 2023 02:07:30 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7ED67C433EF; Mon, 27 Feb 2023 02:07:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1677463650; bh=4JmTZrUY+O4IwHN7+Df+fTXu3fAg+M1jVQjYxFB7Mpw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=WHnQyY4ddr58nm/Q29bH0IZ8/X0zvv7J90FatM7wKDB+iShZlhsDEf0/d82SbEIEq PecPhwZ4UJvXky7otEzvyYtekc8E6VWVpbXWa1GqzKsK8w6cOZn7gZWz5+Hnktw2Jo ZKteV/8Gzd75kj3cMiJtR3I8nkBgYZKaOm4qmxWQz/288d8Lyd9n399L98YNlqBZM8 EBivMyGyl5PrV9F05mKYQUcQZxIs/Rvlkx6HTz2OrB93IiQV3mjw65QoN3Jaw3aoSF 8tDDVt7uNOYBPV15D2VEgyG/mgJRsngYgDiicysoGq+oegDeApW4P3bvd/hCjRQi3s gfL0DY646LrAQ== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Denis Pauk , Ahmad Khalifa , Guenter Roeck , Sasha Levin , jdelvare@suse.com, linux-hwmon@vger.kernel.org Subject: [PATCH AUTOSEL 6.1 41/58] hwmon: (nct6775) Directly call ASUS ACPI WMI method Date: Sun, 26 Feb 2023 21:04:39 -0500 Message-Id: <20230227020457.1048737-41-sashal@kernel.org> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230227020457.1048737-1-sashal@kernel.org> References: <20230227020457.1048737-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Denis Pauk [ Upstream commit c3b3747d02f571da2543e719066a50dd966989d8 ] New ASUS B650/B660/X670 boards firmware have not exposed WMI monitoring GUID and entrypoint method WMBD could be implemented for different device UID. Implement the direct call to entrypoint method for monitoring the device UID of B550/X570 boards. BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=204807 Signed-off-by: Denis Pauk Co-developed-by: Ahmad Khalifa Signed-off-by: Ahmad Khalifa Link: https://lore.kernel.org/r/20230111212241.7456-1-pauk.denis@gmail.com [groeck: Fix multi-line formatting] Signed-off-by: Guenter Roeck Signed-off-by: Sasha Levin --- drivers/hwmon/Kconfig | 2 +- drivers/hwmon/nct6775-platform.c | 98 ++++++++++++++++++++++---------- 2 files changed, 70 insertions(+), 30 deletions(-) diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig index d3bccc8176c51..a5143d01b95f8 100644 --- a/drivers/hwmon/Kconfig +++ b/drivers/hwmon/Kconfig @@ -1508,7 +1508,7 @@ config SENSORS_NCT6775_CORE config SENSORS_NCT6775 tristate "Platform driver for Nuvoton NCT6775F and compatibles" depends on !PPC - depends on ACPI_WMI || ACPI_WMI=n + depends on ACPI || ACPI=n select HWMON_VID select SENSORS_NCT6775_CORE help diff --git a/drivers/hwmon/nct6775-platform.c b/drivers/hwmon/nct6775-platform.c index bf43f73dc835f..e5d4a79cd5f7d 100644 --- a/drivers/hwmon/nct6775-platform.c +++ b/drivers/hwmon/nct6775-platform.c @@ -17,7 +17,6 @@ #include #include #include -#include #include "nct6775.h" @@ -107,40 +106,50 @@ struct nct6775_sio_data { void (*sio_exit)(struct nct6775_sio_data *sio_data); }; -#define ASUSWMI_MONITORING_GUID "466747A0-70EC-11DE-8A39-0800200C9A66" +#define ASUSWMI_METHOD "WMBD" #define ASUSWMI_METHODID_RSIO 0x5253494F #define ASUSWMI_METHODID_WSIO 0x5753494F #define ASUSWMI_METHODID_RHWM 0x5248574D #define ASUSWMI_METHODID_WHWM 0x5748574D #define ASUSWMI_UNSUPPORTED_METHOD 0xFFFFFFFE +#define ASUSWMI_DEVICE_HID "PNP0C14" +#define ASUSWMI_DEVICE_UID "ASUSWMI" + +#if IS_ENABLED(CONFIG_ACPI) +/* + * ASUS boards have only one device with WMI "WMBD" method and have provided + * access to only one SuperIO chip at 0x0290. + */ +static struct acpi_device *asus_acpi_dev; +#endif static int nct6775_asuswmi_evaluate_method(u32 method_id, u8 bank, u8 reg, u8 val, u32 *retval) { -#if IS_ENABLED(CONFIG_ACPI_WMI) +#if IS_ENABLED(CONFIG_ACPI) + acpi_handle handle = acpi_device_handle(asus_acpi_dev); u32 args = bank | (reg << 8) | (val << 16); - struct acpi_buffer input = { (acpi_size) sizeof(args), &args }; - struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; + struct acpi_object_list input; + union acpi_object params[3]; + unsigned long long result; acpi_status status; - union acpi_object *obj; - u32 tmp = ASUSWMI_UNSUPPORTED_METHOD; - - status = wmi_evaluate_method(ASUSWMI_MONITORING_GUID, 0, - method_id, &input, &output); + params[0].type = ACPI_TYPE_INTEGER; + params[0].integer.value = 0; + params[1].type = ACPI_TYPE_INTEGER; + params[1].integer.value = method_id; + params[2].type = ACPI_TYPE_BUFFER; + params[2].buffer.length = sizeof(args); + params[2].buffer.pointer = (void *)&args; + input.count = 3; + input.pointer = params; + + status = acpi_evaluate_integer(handle, ASUSWMI_METHOD, &input, &result); if (ACPI_FAILURE(status)) return -EIO; - obj = output.pointer; - if (obj && obj->type == ACPI_TYPE_INTEGER) - tmp = obj->integer.value; - if (retval) - *retval = tmp; + *retval = (u32)result & 0xFFFFFFFF; - kfree(obj); - - if (tmp == ASUSWMI_UNSUPPORTED_METHOD) - return -ENODEV; return 0; #else return -EOPNOTSUPP; @@ -1099,6 +1108,45 @@ static const char * const asus_wmi_boards[] = { "TUF GAMING Z490-PLUS (WI-FI)", }; +#if IS_ENABLED(CONFIG_ACPI) +/* + * Callback for acpi_bus_for_each_dev() to find the right device + * by _UID and _HID and return 1 to stop iteration. + */ +static int nct6775_asuswmi_device_match(struct device *dev, void *data) +{ + struct acpi_device *adev = to_acpi_device(dev); + const char *uid = acpi_device_uid(adev); + const char *hid = acpi_device_hid(adev); + + if (hid && !strcmp(hid, ASUSWMI_DEVICE_HID) && uid && !strcmp(uid, data)) { + asus_acpi_dev = adev; + return 1; + } + + return 0; +} +#endif + +static enum sensor_access nct6775_determine_access(const char *device_uid) +{ +#if IS_ENABLED(CONFIG_ACPI) + u8 tmp; + + acpi_bus_for_each_dev(nct6775_asuswmi_device_match, (void *)device_uid); + if (!asus_acpi_dev) + return access_direct; + + /* if reading chip id via ACPI succeeds, use WMI "WMBD" method for access */ + if (!nct6775_asuswmi_read(0, NCT6775_PORT_CHIPID, &tmp) && tmp) { + pr_debug("Using Asus WMBD method of %s to access %#x chip.\n", device_uid, tmp); + return access_asuswmi; + } +#endif + + return access_direct; +} + static int __init sensors_nct6775_platform_init(void) { int i, err; @@ -1109,7 +1157,6 @@ static int __init sensors_nct6775_platform_init(void) int sioaddr[2] = { 0x2e, 0x4e }; enum sensor_access access = access_direct; const char *board_vendor, *board_name; - u8 tmp; err = platform_driver_register(&nct6775_driver); if (err) @@ -1122,15 +1169,8 @@ static int __init sensors_nct6775_platform_init(void) !strcmp(board_vendor, "ASUSTeK COMPUTER INC.")) { err = match_string(asus_wmi_boards, ARRAY_SIZE(asus_wmi_boards), board_name); - if (err >= 0) { - /* if reading chip id via WMI succeeds, use WMI */ - if (!nct6775_asuswmi_read(0, NCT6775_PORT_CHIPID, &tmp) && tmp) { - pr_info("Using Asus WMI to access %#x chip.\n", tmp); - access = access_asuswmi; - } else { - pr_err("Can't read ChipID by Asus WMI.\n"); - } - } + if (err >= 0) + access = nct6775_determine_access(ASUSWMI_DEVICE_UID); } /* -- 2.39.0