1 /**
2  * Copyright 2017 Google Inc.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *     http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #include "thermalcontroller.hpp"
18 #include "util.hpp"
19 #include "zone.hpp"
20 
21 
22 std::unique_ptr<PIDController> ThermalController::CreateThermalPid(
23     ZoneInterface* owner,
24     const std::string& id,
25     std::vector<std::string>& inputs,
26     float setpoint,
27     ec::pidinfo initial)
28 {
29     // ThermalController currently only supports precisely one input.
30     if (inputs.size() != 1)
31     {
32         return nullptr;
33     }
34 
35     auto thermal = std::make_unique<ThermalController>(id, inputs, owner);
36 
37     ec::pid_info_t* info = thermal->get_pid_info();
38     thermal->set_setpoint(setpoint);
39 
40     InitializePIDStruct(info, &initial);
41 
42     return thermal;
43 }
44 
45 //bmc_host_sensor_value_float
46 float ThermalController::input_proc(void)
47 {
48     /*
49      * This only supports one thermal input because it doesn't yet know how to
50      * handle merging them, probably max?
51      */
52     double value = _owner->getCachedValue(_inputs.at(0));
53     return static_cast<float>(value);
54 }
55 
56 // bmc_get_setpt
57 float ThermalController::setpt_proc(void)
58 {
59     float setpoint = get_setpoint();
60 
61     /* TODO(venture): Thermal setpoint invalid? */
62 #if 0
63     if (-1 == setpoint)
64     {
65         return 0.0f;
66     }
67     else
68     {
69         return setpoint;
70     }
71 #endif
72     return setpoint;
73 }
74 
75 // bmc_set_pid_output
76 void ThermalController::output_proc(float value)
77 {
78     _owner->addRPMSetPoint(value);
79 
80     return;
81 }
82 
83