From patchwork Sat Jan 14 09:23:27 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Badhri Jagan Sridharan X-Patchwork-Id: 13101918 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 0C044C3DA78 for ; Sat, 14 Jan 2023 09:23:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229726AbjANJXi (ORCPT ); Sat, 14 Jan 2023 04:23:38 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50366 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229925AbjANJXg (ORCPT ); Sat, 14 Jan 2023 04:23:36 -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 034B05BA2 for ; Sat, 14 Jan 2023 01:23:35 -0800 (PST) Received: by mail-yb1-xb49.google.com with SMTP id z9-20020a25ba49000000b007d4416e3667so986182ybj.23 for ; Sat, 14 Jan 2023 01:23:34 -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=W2U/x+KRdCN6it3HlCS5RsRS3YSvRa1PfTbg1xgKGHs=; b=HMqRbjyf9FNteENmFFL3Kz2KHCesjEzxHU/+oj+EmqNjOMk2TRqlgMrNDlBWt60ZDh Rpvj/2E5oXk57+GnFnDbWFP2omGuuMjnnY4YAHM1arj4flDEJGBOnb0/UcuApt2PboxR JgYa9tmwg3RuaDuAdI/8q28rDHjFDuQco53HeBHq0Fb0hINd6YJf8YgEYE39wBN8+LQV CzSt8uR0MlKPlyqtLDUG4oqyEaxEGAtgWI0yvHzEzfkvWX3AdxFupZXjXGmTvSPot/eP JkSNazU67fAlXb4PntFhbCpiwkSAa7dUSS0jIyG0nxmIUz1xfke6tTkzfYFmpnEgow+9 fFJQ== 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=W2U/x+KRdCN6it3HlCS5RsRS3YSvRa1PfTbg1xgKGHs=; b=ZCXFi9Lhhm12qK/Ktq8vQ+pqhvNHpkFsSKFaQaLIsnjW5+vF8gLOF4XqohggE7prMB 7yxF2WzI0L+U5Lzkq1Ot9lTko4FHw6zzl+tTIUHj+E6oi1xsqFhOROWvD8PO+oXjTdpJ 85lbxsB8PjbSQlFRDrvTGLp2qNysn+TpQzRFcLwRV/9wxxCxpKsGagM34+iwjcC9hwul 66qf8o2vFULlRxTHbPWlRswYbdtuM9RjjtZDvCkPiarQq1JaGvHiSvpeM3K1DiMBfXK9 4z3yfo/Ckq8Io6+cXBsNa/sWBWOY/maoUZA1v4GkFxYCOx93dBCBUeCV0DIX/L1bAK0+ PLYQ== X-Gm-Message-State: AFqh2koV50DlTBSa00Qt48Rz83Q98GOiwTInkObSl775fkJiNk1gy1/U 9dD6w7xy3X7qBrmhisYZdiem54LurgA= X-Google-Smtp-Source: AMrXdXsOKri/ygrZN2zncVRQ5HkPN4TJ+/MeWyENrYm/6eEG9jF1wqk9ZAtbLJD6IC/aNs/yWCjy1P8oQSo= X-Received: from badhri.mtv.corp.google.com ([2620:15c:211:201:d726:232e:7cc0:6434]) (user=badhri job=sendgmr) by 2002:a81:4ed8:0:b0:3b5:1538:c19 with SMTP id c207-20020a814ed8000000b003b515380c19mr3525599ywb.210.1673688214260; Sat, 14 Jan 2023 01:23:34 -0800 (PST) Date: Sat, 14 Jan 2023 01:23:27 -0800 In-Reply-To: <20230114092328.1907406-1-badhri@google.com> Mime-Version: 1.0 References: <20230114092328.1907406-1-badhri@google.com> X-Mailer: git-send-email 2.39.0.314.g84b9a713c41-goog Message-ID: <20230114092328.1907406-2-badhri@google.com> Subject: [PATCH v12 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 v11: * None Changes since v10: * None 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);