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| author | jhb <jhb@FreeBSD.org> | 2013-07-16 14:42:16 +0000 |
|---|---|---|
| committer | jhb <jhb@FreeBSD.org> | 2013-07-16 14:42:16 +0000 |
| commit | a198a61e54adc5c0185bed0927496abd5fb9f158 (patch) | |
| tree | 7d8aa71e6156683888f50d5de672edb181a87d64 /sys/dev/acpica/acpi_resource.c | |
| parent | 06ff98bcf15108a6569c26262ea42cc18edbb0d3 (diff) | |
| download | FreeBSD-src-a198a61e54adc5c0185bed0927496abd5fb9f158.zip FreeBSD-src-a198a61e54adc5c0185bed0927496abd5fb9f158.tar.gz | |
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.
Tested by: Robert Ames <robertames@hotmail.com>, lev
Submitted by: Juergen Weiss weiss at uni-mainz.de (original patch)
Diffstat (limited to 'sys/dev/acpica/acpi_resource.c')
| -rw-r--r-- | sys/dev/acpica/acpi_resource.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/sys/dev/acpica/acpi_resource.c b/sys/dev/acpica/acpi_resource.c index 0878d96..1d710dd 100644 --- a/sys/dev/acpica/acpi_resource.c +++ b/sys/dev/acpica/acpi_resource.c @@ -135,6 +135,17 @@ acpi_config_intr(device_t dev, ACPI_RESOURCE *res) 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); |
