/*
* Given an object, verify that it's a reference to a device of some sort,
* and try to switch it on.
*
* XXX replication of off/on function code is bad.
*/
static void
acpi_tz_switch_cooler_on(ACPI_OBJECT *obj, void *arg)
{
struct acpi_tz_softc *sc = (struct acpi_tz_softc *)arg;
ACPI_HANDLE cooler;
ACPI_STATUS status;
ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
cooler = acpi_GetReference(NULL, obj);
if (cooler == NULL) {
ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "can't get handle\n"));
return_VOID;
}
ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "called to turn %s on\n",
acpi_name(cooler)));
status = acpi_pwr_switch_consumer(cooler, ACPI_STATE_D0);
if (ACPI_FAILURE(status)) {
ACPI_VPRINT(sc->tz_dev, acpi_device_get_parent_softc(sc->tz_dev),
"failed to activate %s - %s\n", acpi_name(cooler),
AcpiFormatException(status));
}
return_VOID;
}
/* Find dependent devices. When their parent is removed, so are they. */
static int
acpi_dock_is_ejd_device(ACPI_HANDLE dock_handle, ACPI_HANDLE handle)
{
int ret;
ACPI_STATUS ret_status;
ACPI_BUFFER ejd_buffer;
ACPI_OBJECT *obj;
ret = 0;
ejd_buffer.Pointer = NULL;
ejd_buffer.Length = ACPI_ALLOCATE_BUFFER;
ret_status = AcpiEvaluateObject(handle, "_EJD", NULL, &ejd_buffer);
if (ACPI_FAILURE(ret_status))
goto out;
obj = (ACPI_OBJECT *)ejd_buffer.Pointer;
if (dock_handle == acpi_GetReference(NULL, obj))
ret = 1;
out:
if (ejd_buffer.Pointer != NULL)
AcpiOsFree(ejd_buffer.Pointer);
return (ret);
}
/*
* Given an object, verify that it's a reference to a device of some sort,
* and try to switch it off.
*/
static void
acpi_tz_switch_cooler_off(ACPI_OBJECT *obj, void *arg)
{
ACPI_HANDLE cooler;
ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
cooler = acpi_GetReference(NULL, obj);
if (cooler == NULL) {
ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "can't get handle\n"));
return_VOID;
}
ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "called to turn %s off\n",
acpi_name(cooler)));
acpi_pwr_switch_consumer(cooler, ACPI_STATE_D3);
return_VOID;
}
static int
acpi_ec_probe(device_t dev)
{
ACPI_BUFFER buf;
ACPI_HANDLE h;
ACPI_OBJECT *obj;
ACPI_STATUS status;
device_t peer;
char desc[64];
int ecdt;
int ret;
struct acpi_ec_params *params;
static char *ec_ids[] = { "PNP0C09", NULL };
/* Check that this is a device and that EC is not disabled. */
if (acpi_get_type(dev) != ACPI_TYPE_DEVICE || acpi_disabled("ec"))
return (ENXIO);
/*
* If probed via ECDT, set description and continue. Otherwise,
* we can access the namespace and make sure this is not a
* duplicate probe.
*/
ret = ENXIO;
ecdt = 0;
buf.Pointer = NULL;
buf.Length = ACPI_ALLOCATE_BUFFER;
params = acpi_get_private(dev);
if (params != NULL) {
ecdt = 1;
ret = 0;
} else if (ACPI_ID_PROBE(device_get_parent(dev), dev, ec_ids)) {
params = kmalloc(sizeof(struct acpi_ec_params), M_TEMP,
M_WAITOK | M_ZERO);
h = acpi_get_handle(dev);
/*
* Read the unit ID to check for duplicate attach and the
* global lock value to see if we should acquire it when
* accessing the EC.
*/
status = acpi_GetInteger(h, "_UID", ¶ms->uid);
if (ACPI_FAILURE(status))
params->uid = 0;
status = acpi_GetInteger(h, "_GLK", ¶ms->glk);
if (ACPI_FAILURE(status))
params->glk = 0;
/*
* Evaluate the _GPE method to find the GPE bit used by the EC to
* signal status (SCI). If it's a package, it contains a reference
* and GPE bit, similar to _PRW.
*/
status = AcpiEvaluateObject(h, "_GPE", NULL, &buf);
if (ACPI_FAILURE(status)) {
device_printf(dev, "can't evaluate _GPE - %s\n",
AcpiFormatException(status));
goto out;
}
obj = (ACPI_OBJECT *)buf.Pointer;
if (obj == NULL)
goto out;
switch (obj->Type) {
case ACPI_TYPE_INTEGER:
params->gpe_handle = NULL;
params->gpe_bit = obj->Integer.Value;
break;
case ACPI_TYPE_PACKAGE:
if (!ACPI_PKG_VALID(obj, 2))
goto out;
params->gpe_handle =
acpi_GetReference(NULL, &obj->Package.Elements[0]);
if (params->gpe_handle == NULL ||
acpi_PkgInt32(obj, 1, ¶ms->gpe_bit) != 0)
goto out;
break;
default:
device_printf(dev, "_GPE has invalid type %d\n", obj->Type);
goto out;
}
/* Store the values we got from the namespace for attach. */
acpi_set_private(dev, params);
/*
* Check for a duplicate probe. This can happen when a probe
* via ECDT succeeded already. If this is a duplicate, disable
* this device.
*/
peer = devclass_get_device(acpi_ec_devclass, params->uid);
if (peer == NULL || !device_is_alive(peer))
ret = 0;
else
device_disable(dev);
}
out:
if (ret == 0) {
ksnprintf(desc, sizeof(desc), "Embedded Controller: GPE %#x%s%s",
params->gpe_bit, (params->glk) ? ", GLK" : "",
ecdt ? ", ECDT" : "");
device_set_desc_copy(dev, desc);
}
if (ret > 0 && params)
kfree(params, M_TEMP);
if (buf.Pointer)
AcpiOsFree(buf.Pointer);
return (ret);
}