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Vishwanatha Subbanna75b55102016-11-30 14:20:53 +05301/**
Andrew Jeffery30552c92018-05-25 15:36:30 +09302 * Copyright © 2016,2018 IBM Corporation
Vishwanatha Subbanna75b55102016-11-30 14:20:53 +05303 *
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
Andrew Jefferyc41bf5b2018-05-25 16:39:22 +093017#include "physical.hpp"
18
Andrew Jeffery2332e912018-05-25 15:45:38 +093019#include <cassert>
Alexander Soldatov97ddb722019-04-16 09:10:00 +030020#include <cstdlib>
Vishwanatha Subbanna75b55102016-11-30 14:20:53 +053021#include <iostream>
22#include <string>
Vishwanatha Subbanna75b55102016-11-30 14:20:53 +053023namespace phosphor
24{
25namespace led
26{
27
28/** @brief Populates key parameters */
29void Physical::setInitialState()
30{
Andrew Jeffery5b1417b2019-03-18 17:20:37 +103031 assert = led.getMaxBrightness();
Andrew Jeffery42e02d32018-05-24 13:34:05 +093032 auto trigger = led.getTrigger();
Vishwanatha Subbanna61675c32016-11-30 15:52:15 +053033 if (trigger == "timer")
34 {
Andrew Jeffery30552c92018-05-25 15:36:30 +093035 // LED is blinking. Get the on and off delays and derive percent duty
Andrew Jeffery42e02d32018-05-24 13:34:05 +093036 auto delayOn = led.getDelayOn();
tony lee9e500aa2019-04-23 10:10:24 +080037 uint16_t periodMs = delayOn + led.getDelayOff();
Andrew Jefferybf0b0a92018-05-25 15:41:12 +093038 auto percentScale = periodMs / 100;
39 this->dutyOn(delayOn / percentScale);
tony lee9e500aa2019-04-23 10:10:24 +080040 this->period(periodMs);
Vishwanatha Subbanna61675c32016-11-30 15:52:15 +053041 }
42 else
43 {
Andrew Jeffery30552c92018-05-25 15:36:30 +093044 // Cache current LED state
Andrew Jeffery42e02d32018-05-24 13:34:05 +093045 auto brightness = led.getBrightness();
Andrew Jefferye3719f42023-02-06 14:28:04 +103046 if (brightness != 0U && assert != 0U)
Vishwanatha Subbanna61675c32016-11-30 15:52:15 +053047 {
Andrew Jeffery30552c92018-05-25 15:36:30 +093048 sdbusplus::xyz::openbmc_project::Led::server::Physical::state(
Andrew Jefferyc41bf5b2018-05-25 16:39:22 +093049 Action::On);
Vishwanatha Subbanna61675c32016-11-30 15:52:15 +053050 }
51 else
52 {
Andrew Jeffery30552c92018-05-25 15:36:30 +093053 sdbusplus::xyz::openbmc_project::Led::server::Physical::state(
Andrew Jefferyc41bf5b2018-05-25 16:39:22 +093054 Action::Off);
Vishwanatha Subbanna61675c32016-11-30 15:52:15 +053055 }
56 }
Vishwanatha Subbanna75b55102016-11-30 14:20:53 +053057}
58
Vishwanatha Subbannadb21bc02021-03-26 00:32:46 -050059auto Physical::state() const -> Action
60{
61 return sdbusplus::xyz::openbmc_project::Led::server::Physical::state();
62}
63
Vishwanatha Subbanna75b55102016-11-30 14:20:53 +053064auto Physical::state(Action value) -> Action
65{
Andrew Jefferyc41bf5b2018-05-25 16:39:22 +093066 auto current =
Andrew Jeffery30552c92018-05-25 15:36:30 +093067 sdbusplus::xyz::openbmc_project::Led::server::Physical::state();
Vishwanatha Subbanna61675c32016-11-30 15:52:15 +053068
Andrew Jefferyc41bf5b2018-05-25 16:39:22 +093069 auto requested =
Andrew Jeffery30552c92018-05-25 15:36:30 +093070 sdbusplus::xyz::openbmc_project::Led::server::Physical::state(value);
Vishwanatha Subbanna75b55102016-11-30 14:20:53 +053071
Vishwanatha Subbanna61675c32016-11-30 15:52:15 +053072 driveLED(current, requested);
Vishwanatha Subbanna75b55102016-11-30 14:20:53 +053073
Vishwanatha Subbanna61675c32016-11-30 15:52:15 +053074 return value;
Vishwanatha Subbanna75b55102016-11-30 14:20:53 +053075}
76
Vishwanatha Subbanna61675c32016-11-30 15:52:15 +053077void Physical::driveLED(Action current, Action request)
Vishwanatha Subbanna75b55102016-11-30 14:20:53 +053078{
Vishwanatha Subbanna61675c32016-11-30 15:52:15 +053079 if (current == request)
80 {
Vishwanatha Subbanna61675c32016-11-30 15:52:15 +053081 return;
82 }
83
Andrew Jefferyc41bf5b2018-05-25 16:39:22 +093084 if (request == Action::On || request == Action::Off)
Vishwanatha Subbanna61675c32016-11-30 15:52:15 +053085 {
86 return stableStateOperation(request);
87 }
Andrew Jeffery2332e912018-05-25 15:45:38 +093088
89 assert(request == Action::Blink);
90 blinkOperation();
Vishwanatha Subbanna61675c32016-11-30 15:52:15 +053091}
92
Vishwanatha Subbanna61675c32016-11-30 15:52:15 +053093void Physical::stableStateOperation(Action action)
94{
Andrew Jeffery8e852282023-02-06 19:29:43 +103095 auto value = (action == Action::On) ? assert : deasserted;
Vishwanatha Subbanna61675c32016-11-30 15:52:15 +053096
Andrew Jeffery42e02d32018-05-24 13:34:05 +093097 led.setTrigger("none");
Andrew Jeffery42e02d32018-05-24 13:34:05 +093098 led.setBrightness(value);
Vishwanatha Subbanna61675c32016-11-30 15:52:15 +053099}
100
Vishwanatha Subbanna61675c32016-11-30 15:52:15 +0530101void Physical::blinkOperation()
102{
tony lee9e500aa2019-04-23 10:10:24 +0800103 /*
104 The configuration of the trigger type must precede the configuration of
105 the trigger type properties. From the kernel documentation:
106 "You can change triggers in a similar manner to the way an IO scheduler
107 is chosen (via /sys/class/leds/<device>/trigger). Trigger specific
108 parameters can appear in /sys/class/leds/<device> once a given trigger is
109 selected."
110 Refer:
111 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/leds/leds-class.txt?h=v5.2#n26
112 */
Andrew Jeffery7782f0d2023-02-06 14:44:43 +1030113 auto d = static_cast<unsigned long>(dutyOn());
114 if (d > 100)
115 {
116 d = 100;
117 }
118
119 auto p = static_cast<unsigned long>(period());
120
tony lee9e500aa2019-04-23 10:10:24 +0800121 led.setTrigger("timer");
Andrew Jeffery7782f0d2023-02-06 14:44:43 +1030122 led.setDelayOn(p * d / 100UL);
123 led.setDelayOff(p * (100UL - d) / 100UL);
Vishwanatha Subbanna75b55102016-11-30 14:20:53 +0530124}
125
Alexander Soldatov97ddb722019-04-16 09:10:00 +0300126/** @brief set led color property in DBus*/
127void Physical::setLedColor(const std::string& color)
128{
129 static const std::string prefix =
130 "xyz.openbmc_project.Led.Physical.Palette.";
Andrew Jeffery826ba7b2023-02-06 14:57:15 +1030131
Andrew Jeffery263c0562023-02-06 14:56:16 +1030132 if (color.empty())
Andrew Jeffery826ba7b2023-02-06 14:57:15 +1030133 {
Alexander Soldatov97ddb722019-04-16 09:10:00 +0300134 return;
Andrew Jeffery826ba7b2023-02-06 14:57:15 +1030135 }
136
Alexander Soldatov97ddb722019-04-16 09:10:00 +0300137 std::string tmp = color;
Andrew Jefferydce1e202023-02-06 17:55:15 +1030138 tmp[0] = static_cast<char>(toupper(tmp[0]));
Alexander Soldatov97ddb722019-04-16 09:10:00 +0300139 try
140 {
141 auto palette = convertPaletteFromString(prefix + tmp);
142 setPropertyByName("Color", palette);
143 }
144 catch (const sdbusplus::exception::InvalidEnumString&)
145 {
146 // if color var contains invalid color,
147 // Color property will have default value
148 }
149}
150
Vishwanatha Subbanna75b55102016-11-30 14:20:53 +0530151} // namespace led
152} // namespace phosphor