From mboxrd@z Thu Jan 1 00:00:00 1970 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=-26.3 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT,USER_IN_DEF_DKIM_WL autolearn=ham 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 B314DC64E90 for ; Tue, 1 Dec 2020 01:33:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 518B5206F9 for ; Tue, 1 Dec 2020 01:33:51 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="v97sVUC1" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731231AbgLABdf (ORCPT ); Mon, 30 Nov 2020 20:33:35 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38176 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731118AbgLABdf (ORCPT ); Mon, 30 Nov 2020 20:33:35 -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 B5526C0613D3 for ; Mon, 30 Nov 2020 17:32:54 -0800 (PST) Received: by mail-yb1-xb49.google.com with SMTP id z3so510400ybc.0 for ; Mon, 30 Nov 2020 17:32:54 -0800 (PST) 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=luAMirKoJYalsuVhjtemmSEQvYQcvAW4IlIYXWdu+v4=; b=v97sVUC1aNXg1H56zuiHW0CwftWHHHRjK4dpvsipbKlzj9fqmu+ZZw0N2vXsfVTWmQ xtSu8HlqWRYfanPdrlfWCpZPJZ15fZywIYQFy9k/0jvRXz/4jYBFsArVSZeVd1bp8b5Z mudqhkNXnt+bdEgWeEV02omxZR1OVMlTVeVYDHDvpeDQy36PgQw4JY7kiEimhGYY/qvr AVE3s5IT+kV5CeSViJn0cxQusWpdMRshrMJXXZYfo8XA40CDwR66yU5+O7wgaI8aeULY 1uGdNLLovwEz/qsf4r7qIqMF0SWy0/irBjlZN4Lq3f59IPUmSw9TIV71iV75x7hdOMoX 8gAQ== 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=luAMirKoJYalsuVhjtemmSEQvYQcvAW4IlIYXWdu+v4=; b=mqV5lyIDS9cwvyqStpG5dst+sdTB01f7axU5M5nxPVwnYKF5bxRMMMKngJ9i3sCc+G HGFsXpXSbVx0Q0DEVJheN9k/oRtUqC5gv953On+5EPakdym1DdV4+gqYojwZVg2gqVCK ub8IGJzSXZ3uun4YOml9nkISAz0GOEBnjeFaum51HRpvA6jd62MB5fnp83ZKa5nEv8NH 7rd3R4uJkjjX/LkvOJt63bCWOWmdC+uv/LFhwV9I6VC3TQg3kBMfpM+CS2S6V+Yujs+g VLfpfVQcV2uhXsxw6EDKokbW0RhVTwSyWLdipIL0MOmV7k9PZ6Pzlko+IGDtLpVO6DyG iBrg== X-Gm-Message-State: AOAM531TSD1DxV6lS9R5si+vIrryrflj04vqx81kedIt4JfHZwTWeJvx 4SZ69x+um6lIttjSEdH5xUNGwsTaVzo= X-Google-Smtp-Source: ABdhPJxRq76JNsioT9qhQtE6gOclW1Ojx17Kl991aKFZGQLLHnA47UxluzIxNPnRXoH6Owd0I52xXnsqu4U= Sender: "badhri via sendgmr" X-Received: from badhri.mtv.corp.google.com ([2620:15c:211:201:f292:1cff:fee0:66cf]) (user=badhri job=sendgmr) by 2002:a25:11c2:: with SMTP id 185mr396896ybr.410.1606786373958; Mon, 30 Nov 2020 17:32:53 -0800 (PST) Date: Mon, 30 Nov 2020 17:32:45 -0800 In-Reply-To: <20201201013246.32034-1-badhri@google.com> Message-Id: <20201201013246.32034-2-badhri@google.com> Mime-Version: 1.0 References: <20201201013246.32034-1-badhri@google.com> X-Mailer: git-send-email 2.29.2.454.gaff20da3a2-goog Subject: [PATCH v1 2/3] usb: typec: tcpci: Add support to report vSafe0V 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 Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This change adds vbus_vsafe0v which when set, makes TCPM query for VSAFE0V by assigning the tcpc.is_vbus_vsafe0v callback. Also enables ALERT.ExtendedStatus which is triggered when status of EXTENDED_STATUS.vSafe0V changes. EXTENDED_STATUS.vSafe0V is set when vbus is at vSafe0V and cleared otherwise. Signed-off-by: Badhri Jagan Sridharan --- drivers/usb/typec/tcpm/tcpci.c | 55 ++++++++++++++++++++++++++-------- drivers/usb/typec/tcpm/tcpci.h | 6 ++++ 2 files changed, 49 insertions(+), 12 deletions(-) diff --git a/drivers/usb/typec/tcpm/tcpci.c b/drivers/usb/typec/tcpm/tcpci.c index 12d983a75510..e281b8bee4db 100644 --- a/drivers/usb/typec/tcpm/tcpci.c +++ b/drivers/usb/typec/tcpm/tcpci.c @@ -402,6 +402,19 @@ static int tcpci_get_vbus(struct tcpc_dev *tcpc) return !!(reg & TCPC_POWER_STATUS_VBUS_PRES); } +static int tcpci_is_vbus_vsafe0v(struct tcpc_dev *tcpc) +{ + struct tcpci *tcpci = tcpc_to_tcpci(tcpc); + unsigned int reg; + int ret; + + ret = regmap_read(tcpci->regmap, TCPC_EXTENDED_STATUS, ®); + if (ret < 0) + return ret; + + return !!(reg & TCPC_EXTENDED_STATUS_VSAFE0V); +} + static int tcpci_set_vbus(struct tcpc_dev *tcpc, bool source, bool sink) { struct tcpci *tcpci = tcpc_to_tcpci(tcpc); @@ -554,12 +567,22 @@ static int tcpci_init(struct tcpc_dev *tcpc) TCPC_ALERT_RX_HARD_RST | TCPC_ALERT_CC_STATUS; if (tcpci->controls_vbus) reg |= TCPC_ALERT_POWER_STATUS; + /* Enable VSAFE0V status interrupt when detecting VSAFE0V is supported */ + if (tcpci->data->vbus_vsafe0v) { + reg |= TCPC_ALERT_EXTENDED_STATUS; + ret = regmap_write(tcpci->regmap, TCPC_EXTENDED_STATUS_MASK, + TCPC_EXTENDED_STATUS_VSAFE0V); + if (ret < 0) + return ret; + } return tcpci_write16(tcpci, TCPC_ALERT_MASK, reg); } irqreturn_t tcpci_irq(struct tcpci *tcpci) { u16 status; + int ret; + unsigned int raw; tcpci_read16(tcpci, TCPC_ALERT, &status); @@ -575,18 +598,17 @@ irqreturn_t tcpci_irq(struct tcpci *tcpci) tcpm_cc_change(tcpci->port); if (status & TCPC_ALERT_POWER_STATUS) { - unsigned int reg; - - regmap_read(tcpci->regmap, TCPC_POWER_STATUS_MASK, ®); - - /* - * If power status mask has been reset, then the TCPC - * has reset. - */ - if (reg == 0xff) - tcpm_tcpc_reset(tcpci->port); - else - tcpm_vbus_change(tcpci->port); + ret = regmap_read(tcpci->regmap, TCPC_POWER_STATUS_MASK, &raw); + if (ret >= 0) { + /* + * If power status mask has been reset, then the TCPC + * has reset. + */ + if (raw == 0xff) + tcpm_tcpc_reset(tcpci->port); + else + tcpm_vbus_change(tcpci->port); + } } if (status & TCPC_ALERT_RX_STATUS) { @@ -622,6 +644,12 @@ irqreturn_t tcpci_irq(struct tcpci *tcpci) tcpm_pd_receive(tcpci->port, &msg); } + if (status & TCPC_ALERT_EXTENDED_STATUS) { + ret = regmap_read(tcpci->regmap, TCPC_EXTENDED_STATUS, &raw); + if (ret >= 0 && (raw & TCPC_EXTENDED_STATUS_VSAFE0V)) + tcpm_vbus_change(tcpci->port); + } + if (status & TCPC_ALERT_RX_HARD_RST) tcpm_pd_hard_reset(tcpci->port); @@ -699,6 +727,9 @@ struct tcpci *tcpci_register_port(struct device *dev, struct tcpci_data *data) tcpci_set_auto_vbus_discharge_threshold; } + if (tcpci->data->vbus_vsafe0v) + tcpci->tcpc.is_vbus_vsafe0v = tcpci_is_vbus_vsafe0v; + err = tcpci_parse_config(tcpci); if (err < 0) return ERR_PTR(err); diff --git a/drivers/usb/typec/tcpm/tcpci.h b/drivers/usb/typec/tcpm/tcpci.h index 3fe313655f0c..116a69c85e38 100644 --- a/drivers/usb/typec/tcpm/tcpci.h +++ b/drivers/usb/typec/tcpm/tcpci.h @@ -49,6 +49,9 @@ #define TCPC_TCPC_CTRL_ORIENTATION BIT(0) #define TCPC_TCPC_CTRL_BIST_TM BIT(1) +#define TCPC_EXTENDED_STATUS 0x20 +#define TCPC_EXTENDED_STATUS_VSAFE0V BIT(0) + #define TCPC_ROLE_CTRL 0x1a #define TCPC_ROLE_CTRL_DRP BIT(6) #define TCPC_ROLE_CTRL_RP_VAL_SHIFT 4 @@ -155,11 +158,14 @@ struct tcpci; * is sourcing vbus. * @auto_discharge_disconnect: * Optional; Enables TCPC to autonously discharge vbus on disconnect. + * @vbus_vsafe0v: + * optional; Set when TCPC can detect whether vbus is at VSAFE0V. */ struct tcpci_data { struct regmap *regmap; unsigned char TX_BUF_BYTE_x_hidden:1; unsigned char auto_discharge_disconnect:1; + unsigned char vbus_vsafe0v:1; int (*init)(struct tcpci *tcpci, struct tcpci_data *data); int (*set_vconn)(struct tcpci *tcpci, struct tcpci_data *data, -- 2.29.2.454.gaff20da3a2-goog