From patchwork Tue Sep 29 02:39:56 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: 11804847 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 83A40618 for ; Tue, 29 Sep 2020 02:40:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6865D21734 for ; Tue, 29 Sep 2020 02:40:30 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="V2HGIAtr" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727442AbgI2Ck3 (ORCPT ); Mon, 28 Sep 2020 22:40:29 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39980 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727437AbgI2Ck2 (ORCPT ); Mon, 28 Sep 2020 22:40:28 -0400 Received: from mail-pg1-x54a.google.com (mail-pg1-x54a.google.com [IPv6:2607:f8b0:4864:20::54a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F116BC0613D8 for ; Mon, 28 Sep 2020 19:40:24 -0700 (PDT) Received: by mail-pg1-x54a.google.com with SMTP id c26so1977699pgl.9 for ; Mon, 28 Sep 2020 19:40:24 -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=x75HFZapwymuUzmD7TSk+DIPW4mnSh+u9U5hvOiIQ9E=; b=V2HGIAtrM4/NiDd7cJAJDQWJfnMFj+h/XnxOrAkJeKV3ATi42p07OXaZKcR2UB81GC 2iM1rR/kf6fSEWdrIzTHLvrKEcucX/Nr3u71MNgzTbmR0DMf4F4GjM0nsYi9zfQU7Do5 uKDHitwlbeJWEYu+BPTg70TNx3EjZLcV1dZ8zmxIOSnWB3O73LlGHYKoVrPsyTESXIGr 0k/nXFCSYXT4TDEnNG61zxQ66YV9RZgqLwpqzSKvUSg0ohTbPmvxKeJS8tYjeWDXAqmq 32LeIqU3FMyKWK/4X+FSm5kkMitBdwk4BhcBjiIcYewHw6zQV4NvyB7b5kGWTvyTXkQS rl2Q== 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=x75HFZapwymuUzmD7TSk+DIPW4mnSh+u9U5hvOiIQ9E=; b=knSKl+Epln/BJuTJ4ZQsymYA3YQ4u4nxyzRtbD9GWXjQub1sg9VhXc1aoG2oMH/P5s 16xHPi8kBEqoxtalF2kvRpcQ937b1bbmGACeJcp9vYgenCji5M17a1Xj0AoNkuya6wfQ MO7faHEdNXDlyc1eX5moE8xkUYm0DT4jw6Nuq6yAESTYUC8SnjcEA+CS+8/2D2pL6oBp WS975LOmGYl6N1TBYyoyRQfrqeRouZUGqD5e6ZxcZrv5pPe1zWXAdNui4MyJ2jFg29iO HleASAGZoyJ75RdF1jqq7CJKnoRYDixNAVSOzF3QZQhYv8PqFuYr/qkWgza0ID/GxD1D 3jrA== X-Gm-Message-State: AOAM530xx4K6eHmr9CX2mpfdHtLnP6jDcIujz3pml1Ke8PwwXhT92tfb P9NBUd1qtZf/a5PxZ526/SovZu5KQNQ= X-Google-Smtp-Source: ABdhPJx2Frl4PW5qns9bDls5tNgyMVgp3BzkB/qYlLCNxpnAaIG5fk3ikqHr6IJEQ6Ri8WZSrZ2Wu+HbQxI= Sender: "badhri via sendgmr" X-Received: from badhri.mtv.corp.google.com ([2620:15c:211:1:f292:1cff:fee0:66cf]) (user=badhri job=sendgmr) by 2002:aa7:8612:0:b029:142:2501:3967 with SMTP id p18-20020aa786120000b029014225013967mr2139357pfn.44.1601347224432; Mon, 28 Sep 2020 19:40:24 -0700 (PDT) Date: Mon, 28 Sep 2020 19:39:56 -0700 In-Reply-To: <20200929024004.244992-1-badhri@google.com> Message-Id: <20200929024004.244992-8-badhri@google.com> Mime-Version: 1.0 References: <20200929024004.244992-1-badhri@google.com> X-Mailer: git-send-email 2.28.0.709.gb0816b6eb0-goog Subject: [PATCH v9 07/15] usb: typec: tcpci: Implement callbacks for FRS From: Badhri Jagan Sridharan To: Guenter Roeck , Heikki Krogerus , Greg Kroah-Hartman , Rob Herring , Lee Jones , Mark Brown , Maxime Ripard , Alexandre Belloni , Thierry Reding , Prashant Malani , Badhri Jagan Sridharan Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-usb@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. Changes since v6: - Rebase on usb-next. - Fixed formatting error. - Added Reviewed-by: Heikki. Changes since v7: - Rebase on usb-next. Changes since v8: - None. --- 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