Date: Tue, 24 Jun 2014 19:58:18 +0000 (UTC) From: John Baldwin <jhb@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-9@freebsd.org Subject: svn commit: r267835 - stable/9/sys/dev/acpica Message-ID: <201406241958.s5OJwIrq014183@svn.freebsd.org>
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Author: jhb Date: Tue Jun 24 19:58:18 2014 New Revision: 267835 URL: http://svnweb.freebsd.org/changeset/base/267835 Log: MFC 253392: Workaround some broken BIOSes that specify edge-sensitive but active-low settings for ACPI-enumerated serial ports by forcing any IRQs that use an ISA IRQ value with these settings to active-high instead of active-low. This is known to occur with the BIOS on an Intel D2500CCE motherboard. Modified: stable/9/sys/dev/acpica/acpi_resource.c Directory Properties: stable/9/sys/ (props changed) stable/9/sys/dev/ (props changed) Modified: stable/9/sys/dev/acpica/acpi_resource.c ============================================================================== --- stable/9/sys/dev/acpica/acpi_resource.c Tue Jun 24 19:42:37 2014 (r267834) +++ stable/9/sys/dev/acpica/acpi_resource.c Tue Jun 24 19:58:18 2014 (r267835) @@ -135,6 +135,17 @@ acpi_config_intr(device_t dev, ACPI_RESO default: panic("%s: bad resource type %u", __func__, res->Type); } + +#if defined(__amd64__) || defined(__i386__) + /* + * XXX: Certain BIOSes have buggy AML that specify an IRQ that is + * edge-sensitive and active-lo. However, edge-sensitive IRQs + * should be active-hi. Force IRQs with an ISA IRQ value to be + * active-hi instead. + */ + if (irq < 16 && trig == ACPI_EDGE_SENSITIVE && pol == ACPI_ACTIVE_LOW) + pol = ACPI_ACTIVE_HIGH; +#endif BUS_CONFIG_INTR(dev, irq, (trig == ACPI_EDGE_SENSITIVE) ? INTR_TRIGGER_EDGE : INTR_TRIGGER_LEVEL, (pol == ACPI_ACTIVE_HIGH) ? INTR_POLARITY_HIGH : INTR_POLARITY_LOW);
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