From patchwork Mon Sep 21 19:55:51 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: 11790821 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 9BE58139A for ; Mon, 21 Sep 2020 19:56:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7A71F23447 for ; Mon, 21 Sep 2020 19:56:36 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="n+ZIG19/" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728341AbgIUT4Y (ORCPT ); Mon, 21 Sep 2020 15:56:24 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35558 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728278AbgIUT4R (ORCPT ); Mon, 21 Sep 2020 15:56:17 -0400 Received: from mail-yb1-xb4a.google.com (mail-yb1-xb4a.google.com [IPv6:2607:f8b0:4864:20::b4a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 43BF6C0613D1 for ; Mon, 21 Sep 2020 12:56:17 -0700 (PDT) Received: by mail-yb1-xb4a.google.com with SMTP id f185so13908362ybf.17 for ; Mon, 21 Sep 2020 12:56:17 -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=bm2T+CrCpRo3vv+J+7TT/LPjfYta6ghVQoeicKU+M4k=; b=n+ZIG19/CrRbjvYH5MKj96POy8PjEe+b1pxFwzwz5ohqNcAkjQFC/wiyCLMFDauK5i 6qBQ50qbJ4Phb6YhXgRTpgDj3rW1e6qjQwK6/FS0TBRIrVD5qWTcCl9aMp+idI4j76EV 5+BjrE6V+FPGBFSLB+kahfzcLhSC/o+XiXs5r2hIKqfTMQ0ByMMBzqv4M8hOXp25wVC7 HupwBUauPOQh7pwWEI1ZRhimvyu7IywcDE9PfQKTxrDLECGgPI83R9PoBO5oqzO0hQLk 2dhDjdSOH6XtWhRuP0TQ6hsU6GYTEek0uyGTv8tk/xdVMw4gX1bMwevpz1OOvssgOC7x POjw== 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=bm2T+CrCpRo3vv+J+7TT/LPjfYta6ghVQoeicKU+M4k=; b=PS2PohqbQyYgN5uM4xrJHmTD9fQLvJXRRG+jnr2fgR8KpwbbLtbd1+56IUlLlR+mh1 AC0rv07Ovthh2Kmoimk82KNLKR39npdK+8ULibNBgrBcl7xvasOftX51mI2nhe+Ov67p rqw3dN3sDIEkIfxry8QNWYJMkFj1rG7tkkNWN64O6m9p4tzO2z5NdYOIgxjNOlLxqaTu MCVvEe0E+16feBjfPfCHWrXxOmiX/BQ3QuyDZAI6fQ/XcXUTgL0eDXcgJ/a0lDUEQObL bvMiy08YEY2fowdi/M+5RaYs2vEf37tc/Yaw+/lyVtW+hJ3c/tYLHwmXuh9S/OSBHcDo uSdA== X-Gm-Message-State: AOAM533UGSXsD6Mr45npnPVdWzf8yVm4w7RMKdHYyi/o4KKL85q9a6rS CzFphMTuf+IxDQ7O+gnwnnRvI6XX2J4= X-Google-Smtp-Source: ABdhPJwCgp50wVGLJdMUT75HsueAsOaD8yLJ6RjGJWNpyXbIT9EoLmTnoIe+EwvShpnEPpFiNhgwMUqTLxA= 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:a25:2f85:: with SMTP id v127mr2189523ybv.372.1600718176459; Mon, 21 Sep 2020 12:56:16 -0700 (PDT) Date: Mon, 21 Sep 2020 12:55:51 -0700 In-Reply-To: <20200921195555.1050731-1-badhri@google.com> Message-Id: <20200921195555.1050731-7-badhri@google.com> Mime-Version: 1.0 References: <20200921195555.1050731-1-badhri@google.com> X-Mailer: git-send-email 2.28.0.681.g6f77f65b4e-goog Subject: [PATCH v8 07/11] 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. --- 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