Date: Thu, 19 Nov 2009 09:27:36 -0500 From: Mike Tancsa <mike@sentex.net> To: Karl Denninger <karl@denninger.net>, freebsd-stable@freebsd.org Subject: Re: V8.x-PRE2 Serious PUC problem - Heads Up! Message-ID: <200911191427.nAJERSl6095906@lava.sentex.ca> In-Reply-To: <4B0552B2.2020000@denninger.net> References: <4B0552B2.2020000@denninger.net>
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At 09:14 AM 11/19/2009, Karl Denninger wrote:
>Mike Tancsa wrote:
> > At 09:00 AM 11/19/2009, Karl Denninger wrote:
> >> Well ok then the uart driver is BROKEN.
> >>
> >> It simply locks up on the port after some period of time, returning
> >> nothing. I have found no way to reset the port other than a reboot
> >> either. That's a "surprise" that people running fax servers and other
> >> similar things are going to be very unhappy about.
> >
> > Which serial card are you using ? I have a number of PCI cards (lava
> > for example) that are working quite well with the puc and uart driver
> > combo. Perhaps you could post some details about the hardware used
> > thats having issues.
> >
> > ---Mike
>puc0: <Oxford Semiconductor OX16PCI954 UARTs> port
>0x4060-0x407f,0x4040-0x405f mem
>0x94503000-0x94503fff,0x94502000-0x94502fff irq 16 at device 0.0 on pci3
>puc0: [FILTER]
>uart2: <16550 or compatible> on puc0
>uart2: [FILTER]
>uart3: <16550 or compatible> on puc0
>uart3: [FILTER]
>uart4: <16550 or compatible> on puc0
>uart4: [FILTER]
>uart5: <16550 or compatible> on puc0
>uart5: [FILTER]
>
>It's a generic board with four ports sitting on the PCI bus. Nothing
If you serial app is low speed (e.g 9600), try adding
hint.uart.2.flags="0x100"
hint.uart.3.flags="0x100"
hint.uart.4.flags="0x100"
hint.uart.5.flags="0x100"
to /boot/device.hints and reboot
---Mike
>special, no smarts, just four 16550 uarts. Port "0" is on the
>motherboard and I am using that to talk to my NMEA clock (using PPS,
>which is working). I also am using one of the "troubled" ports to talk
>to an APC UPS, again, without problems.
>
>Trivial and reasonably-trivial applications work fine on the uart/puc
>combination. Hylafax requires correct modem control that is FLAWLESS or
>it WILL blow up. This is an area where smart cards have in the past run
>into driver trouble (going back years; I have lots of experience with
>driver issues on so-called "smart" cards going back more than a decade
>in this sort of application!) and now, it appears that sickness has
>translated into the UART driver as well.
>
>The system in question sends hundreds of faxes a day and any sort of
>squirrelly driver problems in the serial subsystem show up almost
>instantly (I updated to RC2 on that machine last night and it took less
>than an hour for the modems to wedge this morning.)
>
>I tried to flip back to sio() as the driver in GENERIC and it appears
>that can't be done, or I'm missing some interdependency somewhere (doing
>so throws all sorts of errors related to the include files)
>
>-- Karl
>
>
>
>
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--------------------------------------------------------------------
Mike Tancsa, tel +1 519 651 3400
Sentex Communications, mike@sentex.net
Providing Internet since 1994 www.sentex.net
Cambridge, Ontario Canada www.sentex.net/mike
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