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sys/dev/acpi_support/acpi_cros_kblt.c
- This file was added.
| /*- | |||||
| * Copyright (c) 2019 Greg V <greg@unrelenting.technology> | |||||
| * | |||||
| * 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. | |||||
| */ | |||||
| #include <sys/cdefs.h> | |||||
| __FBSDID("$FreeBSD$"); | |||||
| #include "opt_acpi.h" | |||||
| #include <sys/param.h> | |||||
| #include <sys/systm.h> | |||||
| #include <sys/kernel.h> | |||||
| #include <sys/bus.h> | |||||
| #include <sys/sysctl.h> | |||||
| #include <machine/cpufunc.h> | |||||
| #include <contrib/dev/acpica/include/acpi.h> | |||||
| #include <contrib/dev/acpica/include/accommon.h> | |||||
| #include "acpi_if.h" | |||||
| #include <sys/module.h> | |||||
| #include <dev/acpica/acpivar.h> | |||||
| ACPI_MODULE_NAME("CROS_KBLT") | |||||
| struct acpi_cros_kblt_softc { | |||||
| device_t dev; | |||||
| ACPI_HANDLE handle; | |||||
| int val; | |||||
| struct sysctl_ctx_list *sysctl_ctx; | |||||
| struct sysctl_oid *sysctl_tree; | |||||
| }; | |||||
| static int | |||||
| acpi_cros_kblt_sysctl(SYSCTL_HANDLER_ARGS) | |||||
| { | |||||
| struct acpi_cros_kblt_softc *sc = | |||||
| (struct acpi_cros_kblt_softc*)oidp->oid_arg1; | |||||
| int err = 0; | |||||
| ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); | |||||
| if (ACPI_FAILURE(acpi_GetInteger(sc->handle, "KBQC", &sc->val))) { | |||||
| device_printf(sc->dev, "ACPI failure\n"); | |||||
| return (ENXIO); | |||||
| } | |||||
| err = sysctl_handle_int(oidp, &sc->val, 0, req); | |||||
| if (err != 0 || req->newptr == NULL) | |||||
| return (err); | |||||
| if (sc->val > 100) | |||||
| return (EINVAL); | |||||
| if (ACPI_FAILURE(acpi_SetInteger(sc->handle, "KBCM", sc->val))) { | |||||
| device_printf(sc->dev, "ACPI failure\n"); | |||||
| return (ENXIO); | |||||
| } | |||||
| return (err); | |||||
| } | |||||
| static int | |||||
| acpi_cros_kblt_resume(device_t dev) | |||||
| { | |||||
| struct acpi_cros_kblt_softc *sc = device_get_softc(dev); | |||||
| ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); | |||||
| if (ACPI_FAILURE(acpi_SetInteger(sc->handle, "KBCM", sc->val))) { | |||||
| device_printf(sc->dev, "ACPI failure\n"); | |||||
| return (ENXIO); | |||||
| } | |||||
| return (0); | |||||
| } | |||||
| static char *cros_kblt_ids[] = {"GOOG0002", NULL}; | |||||
| static int | |||||
| acpi_cros_kblt_probe(device_t dev) | |||||
| { | |||||
| int err; | |||||
| if (acpi_disabled("cros_kblt") || | |||||
| device_get_unit(dev) != 0) | |||||
| return (ENXIO); | |||||
| err = ACPI_ID_PROBE(device_get_parent(dev), dev, cros_kblt_ids, NULL); | |||||
| if (err <= 0) | |||||
| device_set_desc(dev, "Google Keyboard Backlight Control"); | |||||
| return (err); | |||||
| } | |||||
| static int | |||||
| acpi_cros_kblt_attach(device_t dev) | |||||
| { | |||||
| struct acpi_cros_kblt_softc *sc; | |||||
| ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); | |||||
| sc = device_get_softc(dev); | |||||
| sc->dev = dev; | |||||
| sc->handle = acpi_get_handle(dev); | |||||
| sc->sysctl_ctx = device_get_sysctl_ctx(dev); | |||||
| sc->sysctl_tree = device_get_sysctl_tree(dev); | |||||
| SYSCTL_ADD_PROC(sc->sysctl_ctx, | |||||
| SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO, | |||||
| "level", CTLTYPE_INT | CTLFLAG_RW, | |||||
| sc, 0, acpi_cros_kblt_sysctl, "I", | |||||
| "Keyboard backlight level (0-100)"); | |||||
| return (0); | |||||
| } | |||||
| static device_method_t acpi_cros_kblt_methods[] = { | |||||
| /* Device interface */ | |||||
| DEVMETHOD(device_probe, acpi_cros_kblt_probe), | |||||
| DEVMETHOD(device_attach, acpi_cros_kblt_attach), | |||||
| DEVMETHOD(device_resume, acpi_cros_kblt_resume), | |||||
| DEVMETHOD_END | |||||
| }; | |||||
| static driver_t acpi_cros_kblt_driver = { | |||||
| "acpi_cros_kblt", | |||||
| acpi_cros_kblt_methods, | |||||
| sizeof(struct acpi_cros_kblt_softc), | |||||
| }; | |||||
| static devclass_t acpi_cros_kblt_devclass; | |||||
| DRIVER_MODULE(acpi_cros_kblt, acpi, acpi_cros_kblt_driver, | |||||
| acpi_cros_kblt_devclass, 0, 0); | |||||
| MODULE_DEPEND(acpi_cros_kblt, acpi, 1, 1, 1); | |||||