diff options
author | msmith <msmith@FreeBSD.org> | 2000-10-28 06:59:48 +0000 |
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committer | msmith <msmith@FreeBSD.org> | 2000-10-28 06:59:48 +0000 |
commit | a69e8faa90e4070a65302cf076ac04b9186fa622 (patch) | |
tree | a28f70dd99f84e0e7c0aeb156ae5ff36e60bd789 /sys/dev/acpica/acpi_thermal.c | |
parent | 64e150eaa441bc8b9ecc4f649c022b7d522e487f (diff) | |
download | FreeBSD-src-a69e8faa90e4070a65302cf076ac04b9186fa622.zip FreeBSD-src-a69e8faa90e4070a65302cf076ac04b9186fa622.tar.gz |
Initial FreeBSD OSPM (operating system power management) modules for
ACPICA. Most of these are still works in progress. Support exists for:
- Fixed feature and control method power, lid and sleep buttons.
- Detection of ISA PnP devices using ACPI namespace.
- Detection of PCI root busses using ACPI namespace.
- CPU throttling and sleep states (incomplete)
- Thermal monitoring and cooling control (incomplete)
- Interface to platform embedded controllers (mostly complete)
- ACPI timer (incomplete)
- Simple userland control of sleep states.
- Shutdown and poweroff.
Diffstat (limited to 'sys/dev/acpica/acpi_thermal.c')
-rw-r--r-- | sys/dev/acpica/acpi_thermal.c | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/sys/dev/acpica/acpi_thermal.c b/sys/dev/acpica/acpi_thermal.c new file mode 100644 index 0000000..45398fe --- /dev/null +++ b/sys/dev/acpica/acpi_thermal.c @@ -0,0 +1,102 @@ +/*- + * Copyright (c) 2000 Michael Smith + * Copyright (c) 2000 BSDi + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#include "opt_acpi.h" +#include <sys/param.h> +#include <sys/kernel.h> +#include <sys/bus.h> + +#include "acpi.h" + +#include <dev/acpica/acpivar.h> + +#define TZ_KELVTOC(x) (((x) - 2732) / 10), (((x) - 2732) % 10) + +struct acpi_tz_softc { + device_t tz_dev; + ACPI_HANDLE tz_handle; +}; + +static int acpi_tz_probe(device_t dev); +static int acpi_tz_attach(device_t dev); + +static device_method_t acpi_tz_methods[] = { + /* Device interface */ + DEVMETHOD(device_probe, acpi_tz_probe), + DEVMETHOD(device_attach, acpi_tz_attach), + + {0, 0} +}; + +static driver_t acpi_tz_driver = { + "acpi_tz", + acpi_tz_methods, + sizeof(struct acpi_tz_softc), +}; + +devclass_t acpi_tz_devclass; +DRIVER_MODULE(acpi_tz, acpi, acpi_tz_driver, acpi_tz_devclass, 0, 0); + +static int +acpi_tz_probe(device_t dev) +{ + if (acpi_get_type(dev) == ACPI_TYPE_THERMAL) { + device_set_desc(dev, "thermal zone"); + return(0); + } + return(ENXIO); +} + +static int +acpi_tz_attach(device_t dev) +{ + struct acpi_tz_softc *sc; + UINT32 param[4]; + ACPI_BUFFER buf; + ACPI_STATUS status; + + sc = device_get_softc(dev); + sc->tz_dev = dev; + sc->tz_handle = acpi_get_handle(dev); + + buf.Pointer = ¶m[0]; + buf.Length = sizeof(param); + if ((status = AcpiEvaluateObject(sc->tz_handle, "_TMP", NULL, &buf)) != AE_OK) { + device_printf(sc->tz_dev, "can't fetch temperature - %s\n", acpi_strerror(status)); + return(ENXIO); + } + if (param[0] != ACPI_TYPE_NUMBER) { + device_printf(sc->tz_dev, "%s._TMP does not evaluate to ACPI_TYPE_NUMBER\n", + acpi_name(sc->tz_handle)); + return(ENXIO); + } + device_printf(sc->tz_dev, "current temperature %d.%dC\n", TZ_KELVTOC(param[1])); + + return(0); +} |