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/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2022 Scott Long
* 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.
*/
#include "opt_acpi.h"
#include "opt_thunderbolt.h"
#include <sys/param.h>
#include <sys/conf.h>
#include <sys/uio.h>
#include <sys/proc.h>
#include <sys/kernel.h>
#include <sys/bus.h>
#include <sys/sbuf.h>
#include <sys/module.h>
#include <sys/sysctl.h>
#include <contrib/dev/acpica/include/acpi.h>
#include <contrib/dev/acpica/include/accommon.h>
#include <dev/acpica/acpivar.h>
#include "acpi_wmi_if.h"
ACPI_MODULE_NAME("THUNDERBOLT-NHI-WMI")
#define ACPI_INTEL_THUNDERBOLT_GUID "86CCFD48-205E-4A77-9C48-2021CBEDE341"
struct nhi_wmi_softc {
device_t dev;
device_t wmi_dev;
u_int state;
char *guid;
struct sysctl_ctx_list *sysctl_ctx;
struct sysctl_oid *sysctl_tree;
};
ACPI_SERIAL_DECL(nhi_wmi, "Thunderbolt NHI WMI device");
static void nhi_wmi_identify(driver_t *driver, device_t parent);
static int nhi_wmi_probe(device_t dev);
static int nhi_wmi_attach(device_t dev);
static int nhi_wmi_detach(device_t dev);
static int nhi_wmi_sysctl(SYSCTL_HANDLER_ARGS);
static int nhi_wmi_evaluate_method(struct nhi_wmi_softc *sc,
int method, uint32_t arg0, uint32_t *retval);
static device_method_t nhi_wmi_methods[] = {
DEVMETHOD(device_identify, nhi_wmi_identify),
DEVMETHOD(device_probe, nhi_wmi_probe),
DEVMETHOD(device_attach, nhi_wmi_attach),
DEVMETHOD(device_detach, nhi_wmi_detach),
DEVMETHOD_END
};
static driver_t nhi_wmi_driver = {
"nhi_wmi",
nhi_wmi_methods,
sizeof(struct nhi_wmi_softc)
};
DRIVER_MODULE(nhi_wmi, acpi_wmi, nhi_wmi_driver,
NULL, NULL);
MODULE_DEPEND(nhi_wmi, acpi_wmi, 1, 1, 1);
MODULE_DEPEND(nhi_wmi, acpi, 1, 1, 1);
static void
nhi_wmi_identify(driver_t *driver, device_t parent)
{
if (acpi_disabled("nhi_wmi") != 0)
return;
if (device_find_child(parent, "nhi_wmi", -1) != NULL)
return;
if (ACPI_WMI_PROVIDES_GUID_STRING(parent,
ACPI_INTEL_THUNDERBOLT_GUID) == 0)
return;
if (BUS_ADD_CHILD(parent, 0, "nhi_wmi", -1) == NULL)
device_printf(parent, "failed to add nhi_wmi\n");
}
static int
nhi_wmi_probe(device_t dev)
{
if (ACPI_WMI_PROVIDES_GUID_STRING(device_get_parent(dev),
ACPI_INTEL_THUNDERBOLT_GUID) == 0)
return (EINVAL);
device_set_desc(dev, "Thunderbolt WMI Endpoint");
return (BUS_PROBE_DEFAULT);
}
static int
nhi_wmi_attach(device_t dev)
{
struct nhi_wmi_softc *sc;
sc = device_get_softc(dev);
sc->dev = dev;
sc->wmi_dev = device_get_parent(dev);
sc->sysctl_ctx = device_get_sysctl_ctx(dev);
sc->sysctl_tree = device_get_sysctl_tree(dev);
sc->state = 0;
sc->guid = ACPI_INTEL_THUNDERBOLT_GUID;
SYSCTL_ADD_STRING(sc->sysctl_ctx, SYSCTL_CHILDREN(sc->sysctl_tree),
OID_AUTO, "GUID", CTLFLAG_RD, sc->guid, 0, "WMI GUID");
SYSCTL_ADD_PROC(sc->sysctl_ctx, SYSCTL_CHILDREN(sc->sysctl_tree),
OID_AUTO, "force_power", CTLTYPE_INT|CTLFLAG_RW|CTLFLAG_MPSAFE,
sc, 0, nhi_wmi_sysctl, "I", "Force controller power on");
return (0);
}
static int
nhi_wmi_detach(device_t dev)
{
return (0);
}
static int
nhi_wmi_sysctl(SYSCTL_HANDLER_ARGS)
{
struct nhi_wmi_softc *sc;
int error, arg;
sc = (struct nhi_wmi_softc *)arg1;
arg = !!sc->state;
error = sysctl_handle_int(oidp, &arg, 0, req);
if (!error && req->newptr != NULL) {
ACPI_SERIAL_BEGIN(nhi_wmi);
error = nhi_wmi_evaluate_method(sc, 1, arg, NULL);
ACPI_SERIAL_END(nhi_wmi);
if (error == 0)
sc->state = arg;
}
return (error);
}
static int
nhi_wmi_evaluate_method(struct nhi_wmi_softc *sc, int method, uint32_t arg0,
uint32_t *retval)
{
ACPI_OBJECT *obj;
ACPI_BUFFER in, out;
uint32_t val, params[1];
params[0] = arg0;
in.Pointer = ¶ms;
in.Length = sizeof(params);
out.Pointer = NULL;
out.Length = ACPI_ALLOCATE_BUFFER;
if (ACPI_FAILURE(ACPI_WMI_EVALUATE_CALL(sc->wmi_dev,
ACPI_INTEL_THUNDERBOLT_GUID, 0, method, &in, &out))) {
AcpiOsFree(out.Pointer);
return (EINVAL);
}
obj = out.Pointer;
if (obj != NULL && obj->Type == ACPI_TYPE_INTEGER)
val = (uint32_t)obj->Integer.Value;
else
val = 0;
AcpiOsFree(out.Pointer);
if (retval)
*retval = val;
return (0);
}
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