From patchwork Sat Dec 10 18:51:28 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Badhri Jagan Sridharan X-Patchwork-Id: 13070398 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 4E975C4332F for ; Sat, 10 Dec 2022 18:51:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229722AbiLJSvj (ORCPT ); Sat, 10 Dec 2022 13:51:39 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55072 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229796AbiLJSvh (ORCPT ); Sat, 10 Dec 2022 13:51:37 -0500 Received: from mail-yb1-xb49.google.com (mail-yb1-xb49.google.com [IPv6:2607:f8b0:4864:20::b49]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 56E0B13F18 for ; Sat, 10 Dec 2022 10:51:36 -0800 (PST) Received: by mail-yb1-xb49.google.com with SMTP id a5-20020a25af05000000b006e450a5e507so8693912ybh.22 for ; Sat, 10 Dec 2022 10:51:36 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=wDRNns46OiMIOfUacnaTaHtRPFcj4uoQbXwU5dGeZx4=; b=Q/TbfuyWo05MMVCw4NRFAc4qPu5GPWVq4HFwhVoP8VFml6PbhGhezYZGkPUX1fLS1a 51K7MP3HhoZgpjN4V8YRlkffjswYV+QduE7hkY1c8N3t2E2ZwcShQHPjo2OuaXtH+AaA fh4s0LYGJC+72OyT3AMLrs2H/vEuboXhFt6goPOQhawEc/RObDaw9cEORq1DERgbUUvM 6S7TIRN1P4QnTzrnGVfMCh9x5HY9yH98Tx8CFGXFwqkbLAVmPAmDo/78d+6xKg7GfOFa XSAbFuyzL1Dkv9qsAxtsnKU4PL1vqzLYpv1s7n/n7AK2cih9gla5C5c8F86Bok/hk8Ba 8Xvw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=wDRNns46OiMIOfUacnaTaHtRPFcj4uoQbXwU5dGeZx4=; b=HOx/x4QEwHKQGYzRd2J7XGxUtcc1+8D6C4eZerOLaoNRNb8idCO64PqDgg68K2vecz QHjOWJJcwqxfV0qicCsJwKBLe/iH4rk0QL1+5DMg7BYAoOUIGdhILL7DEUVEp6XCQYru hb6jpgy+71XJubJizpxrTHByrKFXpCnnzRw/po1d8UU+irbHPozeg7czeIbqGpiXwvxU ouIfJL0Jb/xR9uEPLi73z7s+Aggdy3kiFdHrkJ7fx6O/pl9Pen9DqBUy0skL81cRqjj0 xbWTVpJQt9CJHfwdwUzHLwxRcl567bY5/Gm40kdxyTBZwDE5fAW2aZG42oYDw7d2i9hn zL8Q== X-Gm-Message-State: ANoB5pn81Wty5+JSAZn75zLEUf78UHfqy8T8oSXxFWX9InnrcDd+5mQl 28vfBLZGJZsCq0GLd0n0/IBDFttuxfA= X-Google-Smtp-Source: AA0mqf7EdbmjkyEiGAIdQ7JQH3f6h3h+7NzpCsZzIi/dkSbyRAY5F+g5eyRmW72EZopi/tyoNRI2eMlkBPI= X-Received: from badhri.mtv.corp.google.com ([2620:15c:211:201:bcc6:f018:88f8:a199]) (user=badhri job=sendgmr) by 2002:a05:690c:589:b0:3b5:1538:c19 with SMTP id bo9-20020a05690c058900b003b515380c19mr1019381ywb.210.1670698295609; Sat, 10 Dec 2022 10:51:35 -0800 (PST) Date: Sat, 10 Dec 2022 10:51:28 -0800 In-Reply-To: <20221210185129.1094531-1-badhri@google.com> Mime-Version: 1.0 References: <20221210185129.1094531-1-badhri@google.com> X-Mailer: git-send-email 2.39.0.rc1.256.g54fd8350bd-goog Message-ID: <20221210185129.1094531-2-badhri@google.com> Subject: [PATCH v10 2/3] usb: typec: tcpci: Add callback for evaluating contaminant presence From: Badhri Jagan Sridharan To: Guenter Roeck , Heikki Krogerus , Greg Kroah-Hartman Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, Kyle Tso , Badhri Jagan Sridharan Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org This change adds callback to evaluate presence of contaminant in the TCPCI layer. Signed-off-by: Badhri Jagan Sridharan --- Changes since v9: * Check for presence of low level check_contaminant before installing tcpc.check_contaminant. Changes since v7: * None. Skipped versions by mistake. Changes since v6: * Removed is_potential_contaminant callback Changes since v5: * None Changes since v4: * None Changes since v3: * None Changes since v2: * Added tcpci_is_potential_contaminant to offload * disconnect_while_debounce logic --- drivers/usb/typec/tcpm/tcpci.c | 11 +++++++++++ include/linux/usb/tcpci.h | 7 +++++++ 2 files changed, 18 insertions(+) diff --git a/drivers/usb/typec/tcpm/tcpci.c b/drivers/usb/typec/tcpm/tcpci.c index fe781a38dc82..699539e1be06 100644 --- a/drivers/usb/typec/tcpm/tcpci.c +++ b/drivers/usb/typec/tcpm/tcpci.c @@ -403,6 +403,14 @@ static void tcpci_frs_sourcing_vbus(struct tcpc_dev *dev) tcpci->data->frs_sourcing_vbus(tcpci, tcpci->data); } +static void tcpci_check_contaminant(struct tcpc_dev *dev) +{ + struct tcpci *tcpci = tcpc_to_tcpci(dev); + + if (tcpci->data->check_contaminant) + tcpci->data->check_contaminant(tcpci, tcpci->data); +} + static int tcpci_set_bist_data(struct tcpc_dev *tcpc, bool enable) { struct tcpci *tcpci = tcpc_to_tcpci(tcpc); @@ -778,6 +786,9 @@ struct tcpci *tcpci_register_port(struct device *dev, struct tcpci_data *data) tcpci->tcpc.frs_sourcing_vbus = tcpci_frs_sourcing_vbus; tcpci->tcpc.set_partner_usb_comm_capable = tcpci_set_partner_usb_comm_capable; + if (tcpci->data->check_contaminant) + tcpci->tcpc.check_contaminant = tcpci_check_contaminant; + if (tcpci->data->auto_discharge_disconnect) { tcpci->tcpc.enable_auto_vbus_discharge = tcpci_enable_auto_vbus_discharge; tcpci->tcpc.set_auto_vbus_discharge_threshold = diff --git a/include/linux/usb/tcpci.h b/include/linux/usb/tcpci.h index 17657451c762..85e95a3251d3 100644 --- a/include/linux/usb/tcpci.h +++ b/include/linux/usb/tcpci.h @@ -188,6 +188,12 @@ struct tcpci; * Optional; The USB Communications Capable bit indicates if port * partner is capable of communication over the USB data lines * (e.g. D+/- or SS Tx/Rx). Called to notify the status of the bit. + * @check_contaminant: + * Optional; The callback is invoked when chiplevel drivers indicated + * that the USB port needs to be checked for contaminant presence. + * Chip level drivers are expected to check for contaminant and call + * tcpm_clean_port when the port is clean to put the port back into + * toggling state. */ struct tcpci_data { struct regmap *regmap; @@ -204,6 +210,7 @@ struct tcpci_data { void (*frs_sourcing_vbus)(struct tcpci *tcpci, struct tcpci_data *data); void (*set_partner_usb_comm_capable)(struct tcpci *tcpci, struct tcpci_data *data, bool capable); + void (*check_contaminant)(struct tcpci *tcpci, struct tcpci_data *data); }; struct tcpci *tcpci_register_port(struct device *dev, struct tcpci_data *data);