From patchwork Mon Apr 22 06:51:07 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Fritz X-Patchwork-Id: 791159 Received: from fritzc.com (mail.fritzc.com [213.160.72.247]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 32AA84C622; Mon, 22 Apr 2024 07:12:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=213.160.72.247 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713769960; cv=none; b=HWIRR86MPIZHQbtpz9VuPiizCfaqbEyciSmLxudwzUyLTzfwQCxMqPo9E6vBGKZZCdebO4pIAbvb77P5dPYB6a3jWUmFKC9ZCjeIrexPia0Aha1ETmj1GZigVPpkJ4dWr+M4Iet74Hp2aC7IM3qjIFMY0xOiQ1w17fKEMa797gE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713769960; c=relaxed/simple; bh=Tzx1/eWSRHcqk3KBn3lZQgePhYDOso/sqz5cAwscRmg=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=kqZPX5PYumN8VXtQxO9pX8rdRMz6Nx131qRrb1T+Z0dpBhQex1QnE+WOsM3ViBO0I/70prlS6rdIJq0YE8PUuYUwH81tClXbHfraa2xXF1pEHiLPAL0M/gcs2jzM7wE6EDpukI5OxxTSfbjuAxE0KvA8LAjPET176mV1arteFbY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=hexdev.de; spf=pass smtp.mailfrom=hexdev.de; dkim=pass (1024-bit key) header.d=fritzc.com header.i=@fritzc.com header.b=Ns5G9nr6; arc=none smtp.client-ip=213.160.72.247 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=hexdev.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=hexdev.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=fritzc.com header.i=@fritzc.com header.b="Ns5G9nr6" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=fritzc.com; s=dkim; h=Content-Transfer-Encoding:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=Snf7mJCYWthVKyp64Q4r3SmYiNCoko04PmFq7ktAJeo=; b=Ns5G9nr6tuR0ZRyMtEUHaDlD8r TjmgkUCwbfIRJc/qBtQYSMI/vXXAuHIL7eLwHcyv+mzePj+Eb8uLBj6AtldGluvL8DDVTeGdOg5pF nIm3JOgR4fqs7UxUre/BLU8/z5dgakmwCA7vIGcXyE9lLFwK19DY3XPT280h6G+zM3dc=; Received: from 127.0.0.1 by fritzc.com with esmtpsa (TLS1.3:ECDHE_X25519__RSA_PSS_RSAE_SHA256__AES_256_GCM:256) (Exim latest) (envelope-from ) id 1rynWk-001JRH-0P; Mon, 22 Apr 2024 08:51:46 +0200 From: Christoph Fritz To: Oliver Hartkopp , Marc Kleine-Budde , Vincent Mailhol , "David S . Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Jiri Kosina , Benjamin Tissoires , Greg Kroah-Hartman , Jiri Slaby Cc: Andreas Lauser , Jonathan Corbet , linux-can@vger.kernel.org, netdev@vger.kernel.org, devicetree@vger.kernel.org, linux-input@vger.kernel.org, linux-serial@vger.kernel.org Subject: [PATCH 04/11] tty: serdev: Add method to enable break flags Date: Mon, 22 Apr 2024 08:51:07 +0200 Message-Id: <20240422065114.3185505-5-christoph.fritz@hexdev.de> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240422065114.3185505-1-christoph.fritz@hexdev.de> References: <20240422065114.3185505-1-christoph.fritz@hexdev.de> Precedence: bulk X-Mailing-List: linux-serial@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 The recently introduced callback function receive_buf_fp() brings flags buffer support. To allow signaling of TTY_BREAK flags, this patch introduces serdev_device_set_break_detection() and an implementation for ttyport. This enables serdev devices to configure their underlying tty port to signal or ignore break conditions. Signed-off-by: Christoph Fritz --- drivers/tty/serdev/core.c | 11 +++++++++++ drivers/tty/serdev/serdev-ttyport.c | 17 +++++++++++++++++ include/linux/serdev.h | 2 ++ 3 files changed, 30 insertions(+) diff --git a/drivers/tty/serdev/core.c b/drivers/tty/serdev/core.c index 613cb356b918d..23a1e76cb553b 100644 --- a/drivers/tty/serdev/core.c +++ b/drivers/tty/serdev/core.c @@ -339,6 +339,17 @@ unsigned int serdev_device_set_baudrate(struct serdev_device *serdev, unsigned i } EXPORT_SYMBOL_GPL(serdev_device_set_baudrate); +void serdev_device_set_break_detection(struct serdev_device *serdev, bool enable) +{ + struct serdev_controller *ctrl = serdev->ctrl; + + if (!ctrl || !ctrl->ops->set_break_detection) + return; + + ctrl->ops->set_break_detection(ctrl, enable); +} +EXPORT_SYMBOL_GPL(serdev_device_set_break_detection); + void serdev_device_set_flow_control(struct serdev_device *serdev, bool enable) { struct serdev_controller *ctrl = serdev->ctrl; diff --git a/drivers/tty/serdev/serdev-ttyport.c b/drivers/tty/serdev/serdev-ttyport.c index bb47691afdb21..e928bf4175c6f 100644 --- a/drivers/tty/serdev/serdev-ttyport.c +++ b/drivers/tty/serdev/serdev-ttyport.c @@ -192,6 +192,22 @@ static void ttyport_set_flow_control(struct serdev_controller *ctrl, bool enable tty_set_termios(tty, &ktermios); } +static void ttyport_set_break_detection(struct serdev_controller *ctrl, bool enable) +{ + struct serport *serport = serdev_controller_get_drvdata(ctrl); + struct tty_struct *tty = serport->tty; + struct ktermios ktermios = tty->termios; + + ktermios.c_iflag &= ~(IGNBRK | BRKINT); + + if (enable) + ktermios.c_iflag |= BRKINT; + else + ktermios.c_iflag |= IGNBRK; + + tty_set_termios(tty, &ktermios); +} + static int ttyport_set_parity(struct serdev_controller *ctrl, enum serdev_parity parity) { @@ -263,6 +279,7 @@ static const struct serdev_controller_ops ctrl_ops = { .open = ttyport_open, .close = ttyport_close, .set_flow_control = ttyport_set_flow_control, + .set_break_detection = ttyport_set_break_detection, .set_parity = ttyport_set_parity, .set_baudrate = ttyport_set_baudrate, .wait_until_sent = ttyport_wait_until_sent, diff --git a/include/linux/serdev.h b/include/linux/serdev.h index c6ef5a8988e07..d08aa7e16f9f8 100644 --- a/include/linux/serdev.h +++ b/include/linux/serdev.h @@ -94,6 +94,7 @@ struct serdev_controller_ops { int (*open)(struct serdev_controller *); void (*close)(struct serdev_controller *); void (*set_flow_control)(struct serdev_controller *, bool); + void (*set_break_detection)(struct serdev_controller *, bool); int (*set_parity)(struct serdev_controller *, enum serdev_parity); unsigned int (*set_baudrate)(struct serdev_controller *, unsigned int); void (*wait_until_sent)(struct serdev_controller *, long); @@ -215,6 +216,7 @@ void serdev_device_close(struct serdev_device *); int devm_serdev_device_open(struct device *, struct serdev_device *); unsigned int serdev_device_set_baudrate(struct serdev_device *, unsigned int); void serdev_device_set_flow_control(struct serdev_device *, bool); +void serdev_device_set_break_detection(struct serdev_device *, bool); int serdev_device_write_buf(struct serdev_device *, const u8 *, size_t); void serdev_device_wait_until_sent(struct serdev_device *, long); int serdev_device_get_tiocm(struct serdev_device *);