Date: Mon, 24 Aug 2009 21:51:46 +0000 (UTC) From: John Baldwin <jhb@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r196520 - in head/sys: dev/acpica isa Message-ID: <200908242151.n7OLpkBC007339@svn.freebsd.org>
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Author: jhb Date: Mon Aug 24 21:51:46 2009 New Revision: 196520 URL: http://svn.freebsd.org/changeset/base/196520 Log: Tweak the way that the ACPI and ISA bus drivers match hint devices to BIOS-enumerated devices: - Assume a device is a match if the memory and I/O ports match even if the IRQ or DRQ is wrong or missing. Some BIOSes don't include an IRQ for the atrtc device for example. - Add a hack to better match floppy controller devices. Many BIOSes do not include the starting port of the floppy controller listed in the hints (0x3f0) in the resources for the device. So far, however, all the BIOS variations encountered do include the 'port + 2' resource (0x3f2), so adjust the matching for "fdc" devices to look for 'port + 2'. Reviewed by: imp MFC after: 3 days Modified: head/sys/dev/acpica/acpi.c head/sys/isa/isahint.c Modified: head/sys/dev/acpica/acpi.c ============================================================================== --- head/sys/dev/acpica/acpi.c Mon Aug 24 21:04:51 2009 (r196519) +++ head/sys/dev/acpica/acpi.c Mon Aug 24 21:51:46 2009 (r196520) @@ -1014,14 +1014,27 @@ acpi_hint_device_unit(device_t acdev, de continue; /* - * Check for matching resources. We must have at least one, - * and all resources specified have to match. + * Check for matching resources. We must have at least one match. + * Since I/O and memory resources cannot be shared, if we get a + * match on either of those, ignore any mismatches in IRQs or DRQs. * * XXX: We may want to revisit this to be more lenient and wire * as long as it gets one match. */ matches = 0; if (resource_long_value(name, unit, "port", &value) == 0) { + /* + * Floppy drive controllers are notorious for having a + * wide variety of resources not all of which include the + * first port that is specified by the hint (typically + * 0x3f0) (see the comment above fdc_isa_alloc_resources() + * in fdc_isa.c). However, they do all seem to include + * port + 2 (e.g. 0x3f2) so for a floppy device, look for + * 'value + 2' in the port resources instead of the hint + * value. + */ + if (strcmp(name, "fdc") == 0) + value += 2; if (acpi_match_resource_hint(child, SYS_RES_IOPORT, value)) matches++; else @@ -1033,6 +1046,8 @@ acpi_hint_device_unit(device_t acdev, de else continue; } + if (matches > 0) + goto matched; if (resource_long_value(name, unit, "irq", &value) == 0) { if (acpi_match_resource_hint(child, SYS_RES_IRQ, value)) matches++; @@ -1046,6 +1061,7 @@ acpi_hint_device_unit(device_t acdev, de continue; } + matched: if (matches > 0) { /* We have a winner! */ *unitp = unit; Modified: head/sys/isa/isahint.c ============================================================================== --- head/sys/isa/isahint.c Mon Aug 24 21:04:51 2009 (r196519) +++ head/sys/isa/isahint.c Mon Aug 24 21:51:46 2009 (r196520) @@ -118,14 +118,30 @@ isa_hint_device_unit(device_t bus, devic continue; /* - * Check for matching resources. We must have at least one, - * and all resources specified have to match. + * Check for matching resources. We must have at + * least one match. Since I/O and memory resources + * cannot be shared, if we get a match on either of + * those, ignore any mismatches in IRQs or DRQs. * - * XXX: We may want to revisit this to be more lenient and wire - * as long as it gets one match. + * XXX: We may want to revisit this to be more lenient + * and wire as long as it gets one match. */ matches = 0; if (resource_long_value(name, unit, "port", &value) == 0) { + /* + * Floppy drive controllers are notorious for + * having a wide variety of resources not all + * of which include the first port that is + * specified by the hint (typically 0x3f0) + * (see the comment above + * fdc_isa_alloc_resources() in fdc_isa.c). + * However, they do all seem to include port + + * 2 (e.g. 0x3f2) so for a floppy device, look + * for 'value + 2' in the port resources + * instead of the hint value. + */ + if (strcmp(name, "fdc") == 0) + value += 2; if (isa_match_resource_hint(child, SYS_RES_IOPORT, value)) matches++; @@ -139,6 +155,8 @@ isa_hint_device_unit(device_t bus, devic else continue; } + if (matches > 0) + goto matched; if (resource_long_value(name, unit, "irq", &value) == 0) { if (isa_match_resource_hint(child, SYS_RES_IRQ, value)) matches++; @@ -152,6 +170,7 @@ isa_hint_device_unit(device_t bus, devic continue; } + matched: if (matches > 0) { /* We have a winner! */ *unitp = unit;
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