Date: Sun, 30 Jun 2013 13:24:27 -0400 From: Robert Ames <robertames@hotmail.com> To: "freebsd-hackers@freebsd.org" <freebsd-hackers@freebsd.org> Subject: Intel D2500CC serial ports Message-ID: <BLU177-W9398FC7BF05E2069A4961C9700@phx.gbl>
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I just picked up an Intel D2500CCE motherboard and was disappointed to find the serial ports didn't work. There has been discussion about this problem here: http://lists.freebsd.org/pipermail/freebsd-current/2013-April/040897.html http://lists.freebsd.org/pipermail/freebsd-current/2013-May/042088.html As seen in the second link, Juergen Weiss was able to work around the problem. This patch (for 8.4-RELEASE amd64) makes all 4 serial ports functional. --- /usr/src/sys/amd64/amd64/io_apic.c.orig 2013-06-02 13:23:05.000000000 -0500 +++ /usr/src/sys/amd64/amd64/io_apic.c 2013-06-28 18:52:03.000000000 -0500 @@ -452,6 +452,10 @@ KASSERT(!(trig == INTR_TRIGGER_CONFORM || pol == INTR_POLARITY_CONFORM), ("%s: Conforming trigger or polarity\n", __func__)); + if (trig == INTR_TRIGGER_EDGE && pol == INTR_POLARITY_LOW) { + pol = INTR_POLARITY_HIGH; + } + /* * EISA interrupts always use active high polarity, so don't allow * them to be set to active low. However this is just a work around and not a general solution. Does anyone have suggestions on a fix that could be committed so the serial ports for this board will work out of the box?
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