From patchwork Tue Sep 1 02:59:23 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Badhri Jagan Sridharan X-Patchwork-Id: 297785 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=-12.8 required=3.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, DKIM_INVALID, DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, 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 191D3C433E2 for ; Tue, 1 Sep 2020 03:00:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E90252083E for ; Tue, 1 Sep 2020 03:00:42 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=google.com header.i=@google.com header.b="NGF/ymve" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727906AbgIADAX (ORCPT ); Mon, 31 Aug 2020 23:00:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51286 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727099AbgIAC7u (ORCPT ); Mon, 31 Aug 2020 22:59:50 -0400 Received: from mail-pf1-x449.google.com (mail-pf1-x449.google.com [IPv6:2607:f8b0:4864:20::449]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7929CC06123A for ; Mon, 31 Aug 2020 19:59:50 -0700 (PDT) Received: by mail-pf1-x449.google.com with SMTP id o21so1914202pfd.14 for ; Mon, 31 Aug 2020 19:59:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=sender:date:in-reply-to:message-id:mime-version:references:subject :from:to:cc; bh=ywomHyBbrkh1CUGUn9oIS/1bKG05YgBtSywxfZ4E0FU=; b=NGF/ymveLM/4A4XA7qnfcFeufdfbdnU2PGxDYCFrQnFvUePWGMC4t6nZbpEoC7BKMq e67VyMZKd9+g8355Ql0ZkZGVYpy9xm4WCItPFujlPgBROfaX6yJ9Xgy2gXmWr51X8zrT ZTOAVq4sOdFGCUJkgFbwGFw03RKY/V6KzJ9fjrm3SZ8526Kt2FJXpWSzaunuTXX823Eg PzoxgqRcyMbl6neNPzTcxInNlLFTos6DG/3T5WGJn641agMM6QHjiK6M1L6NjvwrcypE cOl/rLTtrBvAqDZv2LTnb8APc/9rJj5mmXuLwcGdV7PpWPHcE2bgsx7p5pJEB/Juek0P bplw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=ywomHyBbrkh1CUGUn9oIS/1bKG05YgBtSywxfZ4E0FU=; b=hE7WFO7AlWTr67TV8826vBbk+TYb6oed8A4hDUCoRikYTxzQW1KPnHJTfyWvc2JsJU 9vKPCDu/frsDUIOKEYRZbIulTmm7yNmGOIRt2tMnxRTuvWf/tSPi5s4TOrC1aL0vceAB 98ZH+ATG3bzvX0LuF3MX9D+OLFa1aUOUtSOP+PwbmG31es5oYr3EiNo/TGUFl9LMEHQI 8B1mk53kveJITGKUkVKkt5UZ+E2vfTHO41U1N3MTo5n1zVRBt7vNJ5mzG6N+6pbOYdmc y6k/Hmvg2PvIKt4IpPPBkH6SWfjFdrzLrCAytR/M+t9DOfIgy/KUocNnD+oFI4zjsuZz 5U3A== X-Gm-Message-State: AOAM530/HzmoW7YCvD6XLcpqBizmIZ4gmG01spRHhIWbMxHZJgG9nAZb jVQ8Ju8IeMa0wS9GwM/I3SfMyKCDIiE= X-Google-Smtp-Source: ABdhPJw5hvDf0Qoiz6yGzcMpcMw9AoxMsh74++ApyWLXQUGEk6RjEjMayv9xhXlZKjXazxsiNMdxSSFltGE= X-Received: from badhri.mtv.corp.google.com ([2620:15c:211:1:f292:1cff:fee0:66cf]) (user=badhri job=sendgmr) by 2002:a17:90b:4ad1:: with SMTP id mh17mr2290334pjb.54.1598929190046; Mon, 31 Aug 2020 19:59:50 -0700 (PDT) Date: Mon, 31 Aug 2020 19:59:23 -0700 In-Reply-To: <20200901025927.3596190-1-badhri@google.com> Message-Id: <20200901025927.3596190-11-badhri@google.com> Mime-Version: 1.0 References: <20200901025927.3596190-1-badhri@google.com> X-Mailer: git-send-email 2.28.0.402.g5ffc5be6b7-goog Subject: [PATCH v6 10/14] usb: typec: tcpci: Implement callbacks for FRS From: Badhri Jagan Sridharan To: Guenter Roeck , Heikki Krogerus , Greg Kroah-Hartman Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, Badhri Jagan Sridharan Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Implement tcpc.enable_frs to enable TCPC to receive Fast role swap signal. Additionally set the sink disconnect threshold to 4v to prevent disconnect during Fast Role swap. Signed-off-by: Badhri Jagan Sridharan Reviewed-by: Heikki Krogerus --- Changes since v1: - Changing patch version to v6 to fix version number confusion. --- drivers/usb/typec/tcpm/tcpci.c | 17 +++++++++++++++++ drivers/usb/typec/tcpm/tcpci.h | 8 ++++++++ 2 files changed, 25 insertions(+) diff --git a/drivers/usb/typec/tcpm/tcpci.c b/drivers/usb/typec/tcpm/tcpci.c index d6a6fac82d48..f9f0af64da5f 100644 --- a/drivers/usb/typec/tcpm/tcpci.c +++ b/drivers/usb/typec/tcpm/tcpci.c @@ -268,6 +268,22 @@ static int tcpci_set_vconn(struct tcpc_dev *tcpc, bool enable) enable ? TCPC_POWER_CTRL_VCONN_ENABLE : 0); } +static int tcpci_enable_frs(struct tcpc_dev *dev, bool enable) +{ + struct tcpci *tcpci = tcpc_to_tcpci(dev); + int ret; + + /* To prevent disconnect during FRS, set disconnect threshold to 3.5V */ + ret = tcpci_write16(tcpci, TCPC_VBUS_SINK_DISCONNECT_THRESH, enable ? 0 : 0x8c); + if (ret < 0) + return ret; + + ret = regmap_update_bits(tcpci->regmap, TCPC_POWER_CTRL, TCPC_FAST_ROLE_SWAP_EN, enable ? + TCPC_FAST_ROLE_SWAP_EN : 0); + + return ret; +} + static int tcpci_set_bist_data(struct tcpc_dev *tcpc, bool enable) { struct tcpci *tcpci = tcpc_to_tcpci(tcpc); @@ -611,6 +627,7 @@ struct tcpci *tcpci_register_port(struct device *dev, struct tcpci_data *data) tcpci->tcpc.set_roles = tcpci_set_roles; tcpci->tcpc.pd_transmit = tcpci_pd_transmit; tcpci->tcpc.set_bist_data = tcpci_set_bist_data; + tcpci->tcpc.enable_frs = tcpci_enable_frs; err = tcpci_parse_config(tcpci); if (err < 0) diff --git a/drivers/usb/typec/tcpm/tcpci.h b/drivers/usb/typec/tcpm/tcpci.h index 82f021a82456..5ef07a56d67a 100644 --- a/drivers/usb/typec/tcpm/tcpci.h +++ b/drivers/usb/typec/tcpm/tcpci.h @@ -16,6 +16,7 @@ #define TCPC_PD_INT_REV 0xa #define TCPC_ALERT 0x10 +#define TCPC_ALERT_EXTND BIT(14) #define TCPC_ALERT_EXTENDED_STATUS BIT(13) #define TCPC_ALERT_VBUS_DISCNCT BIT(11) #define TCPC_ALERT_RX_BUF_OVF BIT(10) @@ -37,6 +38,9 @@ #define TCPC_EXTENDED_STATUS_MASK 0x16 #define TCPC_EXTENDED_STATUS_MASK_VSAFE0V BIT(0) +#define TCPC_ALERT_EXTENDED_MASK 0x17 +#define TCPC_SINK_FAST_ROLE_SWAP BIT(0) + #define TCPC_CONFIG_STD_OUTPUT 0x18 #define TCPC_TCPC_CTRL 0x19 @@ -63,6 +67,7 @@ #define TCPC_POWER_CTRL 0x1c #define TCPC_POWER_CTRL_VCONN_ENABLE BIT(0) +#define TCPC_FAST_ROLE_SWAP_EN BIT(7) #define TCPC_CC_STATUS 0x1d #define TCPC_CC_STATUS_TOGGLING BIT(5) @@ -74,11 +79,14 @@ #define TCPC_POWER_STATUS 0x1e #define TCPC_POWER_STATUS_UNINIT BIT(6) +#define TCPC_POWER_STATUS_SOURCING_VBUS BIT(4) #define TCPC_POWER_STATUS_VBUS_DET BIT(3) #define TCPC_POWER_STATUS_VBUS_PRES BIT(2) #define TCPC_FAULT_STATUS 0x1f +#define TCPC_ALERT_EXTENDED 0x21 + #define TCPC_COMMAND 0x23 #define TCPC_CMD_WAKE_I2C 0x11 #define TCPC_CMD_DISABLE_VBUS_DETECT 0x22