From owner-freebsd-current@FreeBSD.ORG Fri Apr 12 13:08:27 2013 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by hub.freebsd.org (Postfix) with ESMTP id AC3E99B2; Fri, 12 Apr 2013 13:08:27 +0000 (UTC) (envelope-from lev@FreeBSD.org) Received: from onlyone.friendlyhosting.spb.ru (onlyone.friendlyhosting.spb.ru [IPv6:2a01:4f8:131:60a2::2]) by mx1.freebsd.org (Postfix) with ESMTP id 70BA06DA; Fri, 12 Apr 2013 13:08:27 +0000 (UTC) Received: from lion.home.serebryakov.spb.ru (unknown [IPv6:2001:470:923f:1:900d:c887:884e:713b]) (Authenticated sender: lev@serebryakov.spb.ru) by onlyone.friendlyhosting.spb.ru (Postfix) with ESMTPA id 962294AC57; Fri, 12 Apr 2013 17:08:25 +0400 (MSK) Date: Fri, 12 Apr 2013 17:08:19 +0400 From: Lev Serebryakov Organization: FreeBSD X-Priority: 3 (Normal) Message-ID: <1941756367.20130412170819@serebryakov.spb.ru> To: "Poul-Henning Kamp" Subject: Re: Intel D2500CC motherboard and strange RS232/UART behavior In-Reply-To: <1449.1365716268@critter.freebsd.dk> References: <229402991.20130407172016@serebryakov.spb.ru> <201304101016.57894.jhb@freebsd.org> <20130411070139.GR76354@funkthat.com> <201304111050.37055.jhb@freebsd.org> <1449.1365716268@critter.freebsd.dk> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Cc: John-Mark Gurney , freebsd-current@freebsd.org, Adrian Chadd X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list Reply-To: lev@FreeBSD.org List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 12 Apr 2013 13:08:27 -0000 Hello, Poul-Henning. You wrote 12 =D0=B0=D0=BF=D1=80=D0=B5=D0=BB=D1=8F 2013 =D0=B3., 1:37:48: >>These are multiport cards and something like puc or digi, etc. is fine for >>those. The OP's issue is that he has a board with 4 independent 16550 >>UARTs which are attempting to share IRQs. Those are not multiport cards >>and are thus a separate issue. PHK> I think you are mistaken, the 4 uarts are in the same chip and I am PHK> sure they have done something sensible with the interrupts so they PHK> can be shared. Maybe physically, it is one chip (I'm sure, it is), but they are detected as completely independent devices, each with its own I/O port and interrupt... Multiport cards typically group access to "logic" 16550 registers... --=20 // Black Lion AKA Lev Serebryakov