add fan service (#376)

nx/include/switch.h

@@ -64,6 +64,7 @@ extern "C" {
 #include "switch/services/bpc.h"
 #include "switch/services/pcv.h"
 #include "switch/services/clkrst.h"
+#include "switch/services/fan.h"
 #include "switch/services/psm.h"
 #include "switch/services/spsm.h"
 //#include "switch/services/bsd.h" Use <sys/socket.h> instead

nx/include/switch/services/fan.h

@@ -0,0 +1,32 @@
+/**
+ * @file fan.h
+ * @brief Fan service IPC wrapper.
+ * @author Behemoth
+ * @copyright libnx Authors
+ */
+#pragma once
+#include "../types.h"
+#include "../sf/service.h"
+
+typedef struct {
+    Service s;
+} FanController;
+
+/// Initialize fan.
+Result fanInitialize(void);
+
+/// Exit fan.
+void fanExit(void);
+
+/// Gets the Service object for the actual fan service session.
+Service* fanGetServiceSession(void);
+
+/// Opens IController session.
+Result fanOpenController(FanController *out, u32 device_code);
+
+/// Close IController session.
+void fanControllerClose(FanController *controller);
+
+/// @warning Disabling your fan can damage your system.
+Result fanControllerSetRotationSpeedLevel(FanController *controller, float level);
+Result fanControllerGetRotationSpeedLevel(FanController *controller, float *level);

nx/source/services/fan.c

@@ -0,0 +1,39 @@
+#define NX_SERVICE_ASSUME_NON_DOMAIN
+#include "service_guard.h"
+#include "services/fan.h"
+#include "runtime/hosversion.h"
+
+static Service g_fanSrv;
+
+NX_GENERATE_SERVICE_GUARD(fan);
+
+Result _fanInitialize(void) {
+    return smGetService(&g_fanSrv, "fan");
+}
+
+void _fanCleanup(void) {
+    serviceClose(&g_fanSrv);
+}
+
+Result fanOpenController(FanController *out, u32 device_code) {
+    return serviceDispatchIn(&g_fanSrv, 0, device_code,
+        .out_num_objects = 1,
+        .out_objects = &out->s,
+    );
+}
+
+Service* fanGetServiceSession(void) {
+    return &g_fanSrv;
+}
+
+void fanControllerClose(FanController *controller) {
+    serviceClose(&controller->s);
+}
+
+Result fanControllerSetRotationSpeedLevel(FanController *controller, float level) {
+    return serviceDispatchIn(&controller->s, 0, level);
+}
+
+Result fanControllerGetRotationSpeedLevel(FanController *controller, float *level) {
+    return serviceDispatchOut(&controller->s, 2, *level);
+}