From patchwork Tue Nov 24 20:10:33 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Prashant Malani X-Patchwork-Id: 11929817 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 59C68C64E75 for ; Tue, 24 Nov 2020 20:11:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0C6FC2067D for ; Tue, 24 Nov 2020 20:11:38 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="cTKnasuQ" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730312AbgKXULf (ORCPT ); Tue, 24 Nov 2020 15:11:35 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39932 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730298AbgKXULf (ORCPT ); Tue, 24 Nov 2020 15:11:35 -0500 Received: from mail-pf1-x42b.google.com (mail-pf1-x42b.google.com [IPv6:2607:f8b0:4864:20::42b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8942EC0613D6 for ; Tue, 24 Nov 2020 12:11:34 -0800 (PST) Received: by mail-pf1-x42b.google.com with SMTP id x24so109378pfn.6 for ; Tue, 24 Nov 2020 12:11:34 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=1/hdw7M3AFf0fe2uiwx12/tHt1BVjyQkwyG+1IC9NuQ=; b=cTKnasuQyLt0e44sOIGu5dr1XYgMEP8iV1qs032POwBRQoftEBJFIKoxO6yex/sRue GiUPGrfSlgvr05+Ob/8xcRt2Aw5G+FrAgFO+k1g642a3NAxa0O4upthmfBY8wDdKsHdK x/fp7Qk+nj5nsoNZVb1vnuTOIK7T7P/xlOkhk= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=1/hdw7M3AFf0fe2uiwx12/tHt1BVjyQkwyG+1IC9NuQ=; b=Ox1HHeo+6SCd95QQiS8dlnaYiJ713KLijX6mbCsWevP8jBJADBCdtOC0O41iFa348c jXpBunxMpVmb3fZ3e58Z7C8QHiTZNnDdZnSeP1uI86uhbwpUlhJEx4KqYZcCYAvYYuio 4cTdv4y7yN9y+tMmlzSWRl491FyonmimEumeWnp6E7MaSJiXLYcbWh1YnTEShTKvCIjY tOkLdS26sfSWN80FwKP81SdjP9vp1iLgeuOBDYM7I/wfKblRMVGNbmgbBiwrK5PM4GRK vwa9vNcXs+V5r3Cajduj3V4oBW3cV4CBW7hfxu2zH5G0m8L1N5z60PaT+qM1OSMFcxhM EIUA== X-Gm-Message-State: AOAM530XXFm6kTSaiRI3ulgz1Ybzu+p5WliR3EfFdLqKE8bPFIT4/QZB AWhf1Gb3+JaBlYIHsYSLPFMunw== X-Google-Smtp-Source: ABdhPJwbWqqUcZPrR94ebXIG0QHQ/Qih2vrOAit2auVHZmAFdUgjOulJ2kURFNaBw2+xE+H/3W8cxw== X-Received: by 2002:a17:90a:4283:: with SMTP id p3mr335330pjg.174.1606248694106; Tue, 24 Nov 2020 12:11:34 -0800 (PST) Received: from pmalani2.mtv.corp.google.com ([2620:15c:202:201:a28c:fdff:fef0:49dd]) by smtp.gmail.com with ESMTPSA id w15sm53800pjy.47.2020.11.24.12.11.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 24 Nov 2020 12:11:33 -0800 (PST) From: Prashant Malani To: linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, gregkh@linuxfoundation.org, heikki.krogerus@linux.intel.com Cc: bleung@chromium.org, Prashant Malani Subject: [PATCH v4 2/2] usb: typec: Expose Product Type VDOs via sysfs Date: Tue, 24 Nov 2020 12:10:33 -0800 Message-Id: <20201124201033.592576-2-pmalani@chromium.org> X-Mailer: git-send-email 2.29.2.454.gaff20da3a2-goog In-Reply-To: <20201124201033.592576-1-pmalani@chromium.org> References: <20201124201033.592576-1-pmalani@chromium.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org A PD-capable device can return up to 3 Product Type VDOs as part of its DiscoverIdentity Response (USB PD Spec, Rev 3.0, Version 2.0, Section 6.4.4.3.1). Add sysfs attributes to expose these to userspace. Cc: Benson Leung Cc: Heikki Krogerus Signed-off-by: Prashant Malani Reviewed-by: Heikki Krogerus --- Changes in v4: - Added Reviewed-by tag from v3's review. - Rebased on top of usb-next + Patch 1/2 Changes in v3: - Split each product type VDO into a separate attribute. - Changed sprintf() to sysfs_emit(). - Changed ABI documentation based on consolidation of identity VDO descriptions in the previous patch (1/2). Changes in v2: - Added sysfs_notify() call for the attribute. - Added description for the attribute in Documentation/ABI/testing/sysfs-class-typec. Documentation/ABI/testing/sysfs-class-typec | 24 +++++++++++++++ drivers/usb/typec/class.c | 33 +++++++++++++++++++++ 2 files changed, 57 insertions(+) diff --git a/Documentation/ABI/testing/sysfs-class-typec b/Documentation/ABI/testing/sysfs-class-typec index 88ffc14d4cd2..619c4c67432b 100644 --- a/Documentation/ABI/testing/sysfs-class-typec +++ b/Documentation/ABI/testing/sysfs-class-typec @@ -228,6 +228,30 @@ Description: will show 0 until Discover Identity command result becomes available. The value can be polled. +What: /sys/class/typec/-{partner|cable}/identity/product_type_vdo1 +Date: October 2020 +Contact: Prashant Malani +Description: + 1st Product Type VDO of Discover Identity command result. + The value will show 0 until Discover Identity command result becomes + available and a valid Product Type VDO is returned. + +What: /sys/class/typec/-{partner|cable}/identity/product_type_vdo2 +Date: October 2020 +Contact: Prashant Malani +Description: + 2nd Product Type VDO of Discover Identity command result. + The value will show 0 until Discover Identity command result becomes + available and a valid Product Type VDO is returned. + +What: /sys/class/typec/-{partner|cable}/identity/product_type_vdo3 +Date: October 2020 +Contact: Prashant Malani +Description: + 3rd Product Type VDO of Discover Identity command result. + The value will show 0 until Discover Identity command result becomes + available and a valid Product Type VDO is returned. + USB Type-C port alternate mode devices. diff --git a/drivers/usb/typec/class.c b/drivers/usb/typec/class.c index cb1362187a7c..df4478baf95b 100644 --- a/drivers/usb/typec/class.c +++ b/drivers/usb/typec/class.c @@ -124,10 +124,40 @@ static ssize_t product_show(struct device *dev, struct device_attribute *attr, } static DEVICE_ATTR_RO(product); +static ssize_t product_type_vdo1_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct usb_pd_identity *id = get_pd_identity(dev); + + return sysfs_emit(buf, "0x%08x\n", id->vdo[0]); +} +static DEVICE_ATTR_RO(product_type_vdo1); + +static ssize_t product_type_vdo2_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct usb_pd_identity *id = get_pd_identity(dev); + + return sysfs_emit(buf, "0x%08x\n", id->vdo[1]); +} +static DEVICE_ATTR_RO(product_type_vdo2); + +static ssize_t product_type_vdo3_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct usb_pd_identity *id = get_pd_identity(dev); + + return sysfs_emit(buf, "0x%08x\n", id->vdo[2]); +} +static DEVICE_ATTR_RO(product_type_vdo3); + static struct attribute *usb_pd_id_attrs[] = { &dev_attr_id_header.attr, &dev_attr_cert_stat.attr, &dev_attr_product.attr, + &dev_attr_product_type_vdo1.attr, + &dev_attr_product_type_vdo2.attr, + &dev_attr_product_type_vdo3.attr, NULL }; @@ -146,6 +176,9 @@ static void typec_report_identity(struct device *dev) sysfs_notify(&dev->kobj, "identity", "id_header"); sysfs_notify(&dev->kobj, "identity", "cert_stat"); sysfs_notify(&dev->kobj, "identity", "product"); + sysfs_notify(&dev->kobj, "identity", "product_type_vdo1"); + sysfs_notify(&dev->kobj, "identity", "product_type_vdo2"); + sysfs_notify(&dev->kobj, "identity", "product_type_vdo3"); } /* ------------------------------------------------------------------------- */