From patchwork Fri Nov 29 09:29:24 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Huang Shijie X-Patchwork-Id: 3256801 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id AD1FB9F371 for ; Fri, 29 Nov 2013 09:55:46 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 702B7200FF for ; Fri, 29 Nov 2013 09:55:45 +0000 (UTC) Received: from casper.infradead.org (casper.infradead.org [85.118.1.10]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 71C2A20660 for ; Fri, 29 Nov 2013 09:55:40 +0000 (UTC) Received: from merlin.infradead.org ([2001:4978:20e::2]) by casper.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1VmKnF-0007I5-1B; Fri, 29 Nov 2013 09:55:25 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1VmKnC-0003CG-O7; Fri, 29 Nov 2013 09:55:22 +0000 Received: from tx2ehsobe004.messaging.microsoft.com ([65.55.88.14] helo=tx2outboundpool.messaging.microsoft.com) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1VmKn9-0003B4-9S for linux-arm-kernel@lists.infradead.org; Fri, 29 Nov 2013 09:55:19 +0000 Received: from mail218-tx2-R.bigfish.com (10.9.14.243) by TX2EHSOBE004.bigfish.com (10.9.40.24) with Microsoft SMTP Server id 14.1.225.22; Fri, 29 Nov 2013 09:54:46 +0000 Received: from mail218-tx2 (localhost [127.0.0.1]) by mail218-tx2-R.bigfish.com (Postfix) with ESMTP id 6CA8A7E0355; Fri, 29 Nov 2013 09:54:46 +0000 (UTC) X-Forefront-Antispam-Report: CIP:70.37.183.190; KIP:(null); UIP:(null); IPV:NLI; H:mail.freescale.net; RD:none; EFVD:NLI X-SpamScore: 3 X-BigFish: VS3(zzzz1f42h2148h208ch1ee6h1de0h1fdah2073h2146h1202h1e76h1d1ah1d2ah1fc6h1082kzz1de098h8275bh1de097hz2dh2a8h839hd24he5bhf0ah1288h12a5h12a9h12bdh12e5h137ah139eh13b6h1441h1504h1537h162dh1631h1758h1898h18e1h1946h19b5h1ad9h1b0ah1b2fh2222h224fh1fb3h1d0ch1d2eh1d3fh1dc1h1dfeh1dffh1e23h1fe8h1ff5h2218h2216h226dh22d0h2327h2336h1155h) Received: from mail218-tx2 (localhost.localdomain [127.0.0.1]) by mail218-tx2 (MessageSwitch) id 1385718885282104_28921; Fri, 29 Nov 2013 09:54:45 +0000 (UTC) Received: from TX2EHSMHS009.bigfish.com (unknown [10.9.14.246]) by mail218-tx2.bigfish.com (Postfix) with ESMTP id 407DC640047; Fri, 29 Nov 2013 09:54:45 +0000 (UTC) Received: from mail.freescale.net (70.37.183.190) by TX2EHSMHS009.bigfish.com (10.9.99.109) with Microsoft SMTP Server (TLS) id 14.16.227.3; Fri, 29 Nov 2013 09:54:45 +0000 Received: from tx30smr01.am.freescale.net (10.81.153.31) by 039-SN1MMR1-001.039d.mgd.msft.net (10.84.1.13) with Microsoft SMTP Server (TLS) id 14.3.158.2; Fri, 29 Nov 2013 09:54:44 +0000 Received: from shlinux2.ap.freescale.net (shlinux2.ap.freescale.net [10.192.224.44]) by tx30smr01.am.freescale.net (8.14.3/8.14.0) with ESMTP id rAT9sfKF005995; Fri, 29 Nov 2013 02:54:42 -0700 From: Huang Shijie To: Subject: [PATCH] serial: imx: add support for loopback mode. Date: Fri, 29 Nov 2013 17:29:24 +0800 Message-ID: <1385717364-31844-1-git-send-email-b32955@freescale.com> X-Mailer: git-send-email 1.7.2.rc3 MIME-Version: 1.0 X-OriginatorOrg: freescale.com X-FOPE-CONNECTOR: Id%0$Dn%*$RO%0$TLS%0$FQDN%$TlsDn% X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20131129_045519_495918_BD944361 X-CRM114-Status: UNSURE ( 7.44 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -4.2 (----) Cc: Huang Shijie , linux-arm-kernel@lists.infradead.org, linux-serial@vger.kernel.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add the loopback mode support for imx uart driver. Signed-off-by: Huang Shijie --- drivers/tty/serial/imx.c | 8 ++++++++ 1 files changed, 8 insertions(+), 0 deletions(-) diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index b2cfdb6..d799140 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -806,6 +806,9 @@ static unsigned int imx_get_mctrl(struct uart_port *port) if (readl(sport->port.membase + UCR2) & UCR2_CTS) tmp |= TIOCM_RTS; + if (readl(sport->port.membase + uts_reg(sport)) & UTS_LOOP) + tmp |= TIOCM_LOOP; + return tmp; } @@ -821,6 +824,11 @@ static void imx_set_mctrl(struct uart_port *port, unsigned int mctrl) temp |= UCR2_CTS; writel(temp, sport->port.membase + UCR2); + + temp = readl(sport->port.membase + uts_reg(sport)) & ~UTS_LOOP; + if (mctrl & TIOCM_LOOP) + temp |= UTS_LOOP; + writel(temp, sport->port.membase + uts_reg(sport)); } /*