Date: Mon, 15 Sep 2008 09:37:25 -0700 From: Jeremy Chadwick <koitsu@FreeBSD.org> To: Andriy Gapon <avg@icyb.net.ua> Cc: FreeBSD Stable <freebsd-stable@freebsd.org>, Ian Smith <smithi@nimnet.asn.au>, marcel@xcllnt.net Subject: Re: sio => uart: one port is gone Message-ID: <20080915163725.GA41476@icarus.home.lan> In-Reply-To: <48CE815A.9040907@icyb.net.ua> References: <48CE5E9B.9000304@icyb.net.ua> <20080916002823.E439@sola.nimnet.asn.au> <48CE815A.9040907@icyb.net.ua>
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On Mon, Sep 15, 2008 at 06:38:02PM +0300, Andriy Gapon wrote: > on 15/09/2008 17:36 Ian Smith said the following: >> On Mon, 15 Sep 2008, Andriy Gapon wrote: >> > This is a fairly standard and old machine with 2 COM ports. >> > Recently (last Friday) I decided to update my RELENG_7 system and also >> > to transition from sio to uart. >> > > This what I had before the upgrade: >> > kernel: sio0: <16550A-compatible COM port> port 0x3f8-0x3ff irq 4 flags >> > 0x10 on acpi0 >> > kernel: sio0: type 16550A >> > kernel: sio0: [FILTER] >> > kernel: sio1: <16550A-compatible COM port> port 0x2e8-0x2ef irq 3 on acpi0 >> > kernel: sio1: type 16550A >> > kernel: sio1: [FILTER] >> > > This is what I have now: >> > uart0: <16550 or compatible> at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0 >> > uart0: [FILTER] >> > > This is what I have in device.hints for uart: >> > hint.uart.0.at="isa" >> > hint.uart.0.port="0x3F8" >> > hint.uart.0.flags="0x10" >> > hint.uart.0.irq="4" >> > hint.uart.1.at="isa" >> > hint.uart.1.port="0x2F8" >> >> but it's shown as 0x2e8 above .. >> >> > hint.uart.1.irq="3" >> > hint.uart.2.at="isa" >> > > Precisely the same hints (s/uart/sio/) I had for sio. >> >> 0x2f8 is 'standard COM2' address .. did sio1 work ok at 0x2e8 before? > > Ian, > > thank you, I guess I had a typo in my hints, but the port did work. > Looking at the old dmesg I see that sio devices are found 'on acpi0' as > opposed to uart now being found on 'isa0'. > Maybe this is another difference. > > Maybe sio was attached using some information from acpi, so hints were > not that important. But maybe the same acpi information is not applied > to uart, so it does depend on the hints. > > If this guess is correct then this is a regression in sio=>uart > transition, if not, then I'll just correct my device.hints and shut up > :-) I've CC'd Marcel Moolenaar, who can very likely explain what's going on here. -- | Jeremy Chadwick jdc at parodius.com | | Parodius Networking http://www.parodius.com/ | | UNIX Systems Administrator Mountain View, CA, USA | | Making life hard for others since 1977. PGP: 4BD6C0CB |
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