From patchwork Thu Nov 17 23:48:21 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Philipp Jungkamp X-Patchwork-Id: 13047493 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 8F3BBC43217 for ; Thu, 17 Nov 2022 23:49:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234932AbiKQXtL (ORCPT ); Thu, 17 Nov 2022 18:49:11 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50652 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234724AbiKQXtJ (ORCPT ); Thu, 17 Nov 2022 18:49:09 -0500 Received: from mout.gmx.net (mout.gmx.net [212.227.15.15]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F3C22DEEA for ; Thu, 17 Nov 2022 15:49:06 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gmx.net; s=s31663417; t=1668728938; bh=UzfN/nVAKX/EZyeVXEzUh4NnnpwMKQ3fygNjZ2yLwEU=; h=X-UI-Sender-Class:From:To:Cc:Subject:Date:In-Reply-To:References; b=N8GIF5Dpll2LdmqVkUvgEqOweGVpSN0yYm6b4zCEYgfwyj9yHRiitFeDHpnOW4YQX afystvtLH5eY1ULIGg+wY4IQdimiChQkdxmPSu3baBwQycdwHLeKUhTwvb9BxGkyUK 2EfAcFuHqWj2d3IMMBT0xblG7Fe2mgrOfboyKdSmNKvn1T6a28dlwCFUfJYHXVfInb zSQ4WDONtMEaWb+oaDqADKlfmTVMSDAiJ2S97sQnGY1egriVD7CvHTQC8UJgom+CVg 3YkJtM5eX2BInJW6lCr1aL4Sf+I92x/HKAbDWj3NEcDlN09eiwzhdZSXSCVRLutBFr 1olkyjqN37eEg== X-UI-Sender-Class: 724b4f7f-cbec-4199-ad4e-598c01a50d3a Received: from localhost.localdomain ([95.223.45.31]) by mail.gmx.net (mrgmx005 [212.227.17.190]) with ESMTPSA (Nemesis) id 1MEFvj-1omEN246sP-00ABvA; Fri, 18 Nov 2022 00:48:58 +0100 From: Philipp Jungkamp To: Jiri Kosina , Jonathan Cameron , Srinivas Pandruvada Cc: linux-iio@vger.kernel.org, Philipp Jungkamp Subject: [PATCH v3 1/4] HID: hid-sensor-custom: Allow more custom iio sensors Date: Fri, 18 Nov 2022 00:48:21 +0100 Message-Id: <20221117234824.6227-1-p.jungkamp@gmx.net> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221117150508.00002704@Huawei.com> References: <20221117150508.00002704@Huawei.com> MIME-Version: 1.0 X-Provags-ID: V03:K1:MkV0adkBqD82yx49c3Ts4LXGqBXULZKDpxDqBnLpp4IEVmCTh3e BJvLg0RiGRrTVZJ8VEqAUf9bOm/K2ex8ABBtOjTqkyhXeaX/7RnWnEHKETTuNDOQlItNYwh xzq4F7hbp4zXI5axCO8Gsvrx6+TFpXrKCVqkCl+3F/91SO6MBCHchRIdPljUpaQmkZLcg6h biqVERzhTWUexz7q8dejg== UI-OutboundReport: notjunk:1;M01:P0:OU8vI4Ca/RY=;zBzr99mNjjIdNwVXiFAkDewvRLG /96x6IyG8oxw+qzw2N9rwuJF2FqeKT82KSdwJOqLkpb2dI9sFHd1Lg5j0At00crOWIKqyCTqo 5B5ASwRk4LPX6OuK7XM5hjGgufKB5Jg655+Sa8WlkYiKi0Ne6CYdFEYSizCgWRQT3w4xLhd+u XRveiQwBZ8JP1x6bgbGTL5Ebm4CN+ExAA4kXcvxxLlgNloreBN8CbCCH3mQNxk5VSKg03nwQv 82r7NkGjZ6KqQekKmmbAmGzKZYsmPLYtss6O0meupSEbxQxr/ji8ewEIpn5gabPXDVxqbRKKx BKCNTKN8PL1i0vJSKtPH/BcHoBD6F+B5lHXTmC8fUFRlPooHPYdahP1nBtR2NEvXOpCO1j5Xt G1Ka/CqJ+EpwSslH2HM4Bcgb4cYhdcvX6HaYB4ywCZfOdSrcL2iIhfyjprKM9bi5WRfBznmRK T22Ejg19Zbepk5BfX6Rd8UL3gdN9xZ6x99LeWjFTL7YrB9J7D9tOv2ap5X9tjkAHH2A0O9e55 kQps2KJbiTSvHbQg3M81+uWKSxlWSYdMvp1MI2pfWg437xZW2ZkrrNMW8BFPhIlQ2EljCkuWF Hu2zkDUdH83sFfT7VSdj308mz2Mt7PffsFqWdL08j9joazMfCcFYA4hg0sZ0V1C0jNK26LPHu G+F4HRZxETLKPoPoMKdJdVJyyT8AGCA6l9hrZc2F8MbMwyaFfvWHkxiTaA7WXyDRrFosvO1te /RmDBEuQUGLnu/GNcrwfdmYtqhhGfyVXPlt6puhz/nouvDEnlp8XNhiKC4rycE9knTF/e0HTQ d3yDNdO57YA183f//VmEgerGsBzM2JzVIiNkCJSv7lDNqZBPB1HIXOHBHqu/U6DpFeIepYDVe Z6FyiT+/ZM0cf1/5VOTpkBEW4IwiNCIB+3EVcNR/KWrR6rzHYdgw3djO7kuyKwIbYw1I6V/mI aOS8X4Iu3p2exjS0tpGRaVgakI8= Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org The known LUID table for established/known custom HID sensors was limited to sensors with "INTEL" as manufacturer. But some vendors such as Lenovo also include fairly standard iio sensors (e.g. ambient light) in their custom sensors. Expand the known custom sensors table by a tag used for the platform device name and match sensors based on the LUID as well as optionally on model and manufacturer properties. Introduce sensors from Lenovo's "Intelligent Sensing Solution" on the Lenovo Yoga 9 14IAP7 as an example. Signed-off-by: Philipp Jungkamp --- Hello, here's a short summary of changes compared to v1: Added an additional commit which adds the LISS entries to the known custom sensors. Removed all unnecessary linebreaks from modified function calls and stayed below the 80 columns. Revisited the matching logic and removed the explicit error codes in favor of bools and forwarding the inner error. I noticed that the strange ENODATA return code was already redundant with the **known out parameter. So I removed it. Changes compared to v2: I forgot to sign off on the new commit I introduced. I'm not really too comfortable with signoffs and mailing lists yet. Regards, Philipp Jungkamp drivers/hid/hid-sensor-custom.c | 211 +++++++++++++++++++++----------- include/linux/hid-sensor-ids.h | 1 + 2 files changed, 142 insertions(+), 70 deletions(-) -- 2.38.1 diff --git a/drivers/hid/hid-sensor-custom.c b/drivers/hid/hid-sensor-custom.c index 32c2306e240d..89e56913c92e 100644 --- a/drivers/hid/hid-sensor-custom.c +++ b/drivers/hid/hid-sensor-custom.c @@ -5,6 +5,7 @@ */ #include +#include #include #include #include @@ -750,114 +751,184 @@ static void hid_sensor_custom_dev_if_remove(struct hid_sensor_custom } -/* luid defined in FW (e.g. ISH). Maybe used to identify sensor. */ -static const char *const known_sensor_luid[] = { "020B000000000000" }; +/* + * Match a known custom sensor. + * tag and luid is mandatory. + */ +struct hid_sensor_custom_match { + const char *tag; + const char *luid; + const char *model; + const char *manufacturer; + bool check_dmi; + struct dmi_system_id dmi; +}; -static int get_luid_table_index(unsigned char *usage_str) -{ - int i; +/* + * Custom sensor properties used for matching. + */ +struct hid_sensor_custom_properties { + u16 serial_num[HID_CUSTOM_MAX_FEATURE_BYTES]; + u16 model[HID_CUSTOM_MAX_FEATURE_BYTES]; + u16 manufacturer[HID_CUSTOM_MAX_FEATURE_BYTES]; +}; + +static const struct hid_sensor_custom_match hid_sensor_custom_known_table[] = { + /* + * Intel Integrated Sensor Hub (ISH) + */ + { /* Intel ISH hinge */ + .tag = "INT", + .luid = "020B000000000000", + .manufacturer = "INTEL", + }, + {} +}; - for (i = 0; i < ARRAY_SIZE(known_sensor_luid); i++) { - if (!strncmp(usage_str, known_sensor_luid[i], - strlen(known_sensor_luid[i]))) - return i; +static bool hid_sensor_custom_prop_match_str(const u16 *prop, const char *match, + size_t count) +{ + while (count-- && *prop && *match) { + if (*prop & 0xFF00 || + *match != (char) *prop) + return false; + prop++; + match++; } - return -ENODEV; + return (count == -1) || *prop == (u16)*match; } -static int get_known_custom_sensor_index(struct hid_sensor_hub_device *hsdev) +static bool hid_sensor_custom_get_prop(struct hid_sensor_hub_device *hsdev, + u32 prop_usage_id, size_t prop_size, + u16 *prop) { - struct hid_sensor_hub_attribute_info sensor_manufacturer = { 0 }; - struct hid_sensor_hub_attribute_info sensor_luid_info = { 0 }; + struct hid_sensor_hub_attribute_info prop_attr = { 0 }; int report_size; int ret; - static u16 w_buf[HID_CUSTOM_MAX_FEATURE_BYTES]; - static char buf[HID_CUSTOM_MAX_FEATURE_BYTES]; - int i; - memset(w_buf, 0, sizeof(w_buf)); - memset(buf, 0, sizeof(buf)); + memset(prop, 0, prop_size); - /* get manufacturer info */ - ret = sensor_hub_input_get_attribute_info(hsdev, - HID_FEATURE_REPORT, hsdev->usage, - HID_USAGE_SENSOR_PROP_MANUFACTURER, &sensor_manufacturer); + ret = sensor_hub_input_get_attribute_info(hsdev, HID_FEATURE_REPORT, + hsdev->usage, prop_usage_id, + &prop_attr); if (ret < 0) - return ret; + return 0; - report_size = - sensor_hub_get_feature(hsdev, sensor_manufacturer.report_id, - sensor_manufacturer.index, sizeof(w_buf), - w_buf); + report_size = sensor_hub_get_feature(hsdev, prop_attr.report_id, + prop_attr.index, prop_size, prop); if (report_size <= 0) { hid_err(hsdev->hdev, - "Failed to get sensor manufacturer info %d\n", + "Failed to get sensor property %08x %d\n", + prop_usage_id, report_size); - return -ENODEV; + return report_size; } - /* convert from wide char to char */ - for (i = 0; i < ARRAY_SIZE(buf) - 1 && w_buf[i]; i++) - buf[i] = (char)w_buf[i]; + return 0; +} + +static bool +hid_sensor_custom_do_match(struct hid_sensor_hub_device *hsdev, + const struct hid_sensor_custom_match *match, + const struct hid_sensor_custom_properties *prop) +{ + struct dmi_system_id dmi[] = { match->dmi, { 0 } }; + + if (!hid_sensor_custom_prop_match_str(prop->serial_num, "LUID:", 5) || + !hid_sensor_custom_prop_match_str(prop->serial_num + 5, match->luid, + HID_CUSTOM_MAX_FEATURE_BYTES - 5)) + return false; + + if (match->model && + !hid_sensor_custom_prop_match_str(prop->model, match->model, + HID_CUSTOM_MAX_FEATURE_BYTES)) + return false; - /* ensure it's ISH sensor */ - if (strncmp(buf, "INTEL", strlen("INTEL"))) - return -ENODEV; + if (match->manufacturer && + !hid_sensor_custom_prop_match_str(prop->manufacturer, match->manufacturer, + HID_CUSTOM_MAX_FEATURE_BYTES)) + return false; - memset(w_buf, 0, sizeof(w_buf)); - memset(buf, 0, sizeof(buf)); + if (match->check_dmi && !dmi_check_system(dmi)) + return false; - /* get real usage id */ - ret = sensor_hub_input_get_attribute_info(hsdev, - HID_FEATURE_REPORT, hsdev->usage, - HID_USAGE_SENSOR_PROP_SERIAL_NUM, &sensor_luid_info); + return true; +} + +static int +hid_sensor_custom_properties_get(struct hid_sensor_hub_device *hsdev, + struct hid_sensor_custom_properties *prop) +{ + int ret; + + ret = hid_sensor_custom_get_prop(hsdev, + HID_USAGE_SENSOR_PROP_SERIAL_NUM, + HID_CUSTOM_MAX_FEATURE_BYTES, + prop->serial_num); if (ret < 0) return ret; - report_size = sensor_hub_get_feature(hsdev, sensor_luid_info.report_id, - sensor_luid_info.index, sizeof(w_buf), - w_buf); - if (report_size <= 0) { - hid_err(hsdev->hdev, "Failed to get real usage info %d\n", - report_size); - return -ENODEV; - } + ret = hid_sensor_custom_get_prop(hsdev, + HID_USAGE_SENSOR_PROP_MODEL, + HID_CUSTOM_MAX_FEATURE_BYTES, + prop->model); + if (ret < 0) + return ret; - /* convert from wide char to char */ - for (i = 0; i < ARRAY_SIZE(buf) - 1 && w_buf[i]; i++) - buf[i] = (char)w_buf[i]; + ret = hid_sensor_custom_get_prop(hsdev, + HID_USAGE_SENSOR_PROP_MANUFACTURER, + HID_CUSTOM_MAX_FEATURE_BYTES, + prop->manufacturer); + if (ret < 0) + return ret; - if (strlen(buf) != strlen(known_sensor_luid[0]) + 5) { - hid_err(hsdev->hdev, - "%s luid length not match %zu != (%zu + 5)\n", __func__, - strlen(buf), strlen(known_sensor_luid[0])); - return -ENODEV; + return 0; +} + +static int +hid_sensor_custom_get_known(struct hid_sensor_hub_device *hsdev, + const struct hid_sensor_custom_match **known) +{ + int ret; + const struct hid_sensor_custom_match *match = + hid_sensor_custom_known_table; + struct hid_sensor_custom_properties prop; + + ret = hid_sensor_custom_properties_get(hsdev, &prop); + if (ret < 0) + return ret; + + while (match->tag) { + if (hid_sensor_custom_do_match(hsdev, match, &prop)) { + *known = match; + return 0; + } + match++; } - /* get table index with luid (not matching 'LUID: ' in luid) */ - return get_luid_table_index(&buf[5]); + *known = NULL; + return 0; } static struct platform_device * hid_sensor_register_platform_device(struct platform_device *pdev, struct hid_sensor_hub_device *hsdev, - int index) + const struct hid_sensor_custom_match *match) { - char real_usage[HID_SENSOR_USAGE_LENGTH] = { 0 }; + char real_usage[HID_SENSOR_USAGE_LENGTH]; struct platform_device *custom_pdev; const char *dev_name; char *c; - /* copy real usage id */ - memcpy(real_usage, known_sensor_luid[index], 4); + memcpy(real_usage, match->luid, 4); + real_usage[4] = '\0'; - /* usage id are all lowcase */ for (c = real_usage; *c != '\0'; c++) *c = tolower(*c); - /* HID-SENSOR-INT-REAL_USAGE_ID */ - dev_name = kasprintf(GFP_KERNEL, "HID-SENSOR-INT-%s", real_usage); + dev_name = kasprintf(GFP_KERNEL, "HID-SENSOR-%s-%s", + match->tag, real_usage); if (!dev_name) return ERR_PTR(-ENOMEM); @@ -873,7 +944,7 @@ static int hid_sensor_custom_probe(struct platform_device *pdev) struct hid_sensor_custom *sensor_inst; struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data; int ret; - int index; + const struct hid_sensor_custom_match *match = NULL; sensor_inst = devm_kzalloc(&pdev->dev, sizeof(*sensor_inst), GFP_KERNEL); @@ -888,10 +959,10 @@ static int hid_sensor_custom_probe(struct platform_device *pdev) mutex_init(&sensor_inst->mutex); platform_set_drvdata(pdev, sensor_inst); - index = get_known_custom_sensor_index(hsdev); - if (index >= 0 && index < ARRAY_SIZE(known_sensor_luid)) { + ret = hid_sensor_custom_get_known(hsdev, &match); + if (!ret && match) { sensor_inst->custom_pdev = - hid_sensor_register_platform_device(pdev, hsdev, index); + hid_sensor_register_platform_device(pdev, hsdev, match); ret = PTR_ERR_OR_ZERO(sensor_inst->custom_pdev); if (ret) { diff --git a/include/linux/hid-sensor-ids.h b/include/linux/hid-sensor-ids.h index ac631159403a..13b1e65fbdcc 100644 --- a/include/linux/hid-sensor-ids.h +++ b/include/linux/hid-sensor-ids.h @@ -132,6 +132,7 @@ #define HID_USAGE_SENSOR_PROP_FRIENDLY_NAME 0x200301 #define HID_USAGE_SENSOR_PROP_SERIAL_NUM 0x200307 #define HID_USAGE_SENSOR_PROP_MANUFACTURER 0x200305 +#define HID_USAGE_SENSOR_PROP_MODEL 0x200306 #define HID_USAGE_SENSOR_PROP_REPORT_INTERVAL 0x20030E #define HID_USAGE_SENSOR_PROP_SENSITIVITY_ABS 0x20030F #define HID_USAGE_SENSOR_PROP_SENSITIVITY_RANGE_PCT 0x200310