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6ff7a74006
Green when charged and ext. power plugged in.
Orange when charging.
Blinking orange if there is a charging/battery related error.
Blinking green if in "charge force idle mode" in the factory.
Off otherwise.
BUG=chrome-os-partner:23634
BRANCH=rambi
TEST=test each of the states above
To fake battery error, unplug battery and wait 30 secs
To force idle, 'ectool chargecontrol idle'
Change-Id: I85fff72d1df85bbbaa1da66572f44f58a960244e
Signed-off-by: Randall Spangler <rspangler@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/185240
Reviewed-by: Dave Parker <dparker@chromium.org>
122 lines
2.9 KiB
C
122 lines
2.9 KiB
C
/* Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*
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* Battery LED control for Rambi
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*/
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#include "charge_state.h"
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#include "chipset.h"
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#include "gpio.h"
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#include "hooks.h"
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#include "led_common.h"
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#include "pwm.h"
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#include "util.h"
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const enum ec_led_id supported_led_ids[] = {EC_LED_ID_BATTERY_LED};
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const int supported_led_ids_count = ARRAY_SIZE(supported_led_ids);
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enum led_color {
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LED_OFF = 0,
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LED_RED,
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LED_ORANGE,
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LED_YELLOW,
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LED_GREEN,
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/* Number of colors, not a color itself */
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LED_COLOR_COUNT
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};
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/* Brightness vs. color, for {red, green} LEDs */
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static const uint8_t color_brightness[LED_COLOR_COUNT][2] = {
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{0, 0},
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{100, 0},
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{30, 45},
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{20, 60},
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{0, 100},
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};
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/**
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* Set LED color
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*
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* @param color Enumerated color value
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*/
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static void set_color(enum led_color color)
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{
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pwm_set_duty(PWM_CH_LED_RED, color_brightness[color][0]);
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pwm_set_duty(PWM_CH_LED_GREEN, color_brightness[color][1]);
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}
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void led_get_brightness_range(enum ec_led_id led_id, uint8_t *brightness_range)
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{
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brightness_range[EC_LED_COLOR_RED] = 100;
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brightness_range[EC_LED_COLOR_GREEN] = 100;
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}
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int led_set_brightness(enum ec_led_id led_id, const uint8_t *brightness)
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{
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pwm_set_duty(PWM_CH_LED_RED, brightness[EC_LED_COLOR_RED]);
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pwm_set_duty(PWM_CH_LED_GREEN, brightness[EC_LED_COLOR_GREEN]);
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return EC_SUCCESS;
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}
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static void led_init(void)
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{
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/* Configure GPIOs */
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gpio_config_module(MODULE_PWM_LED, 1);
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/*
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* Enable PWMs and set to 0% duty cycle. If they're disabled, the LM4
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* seems to ground the pins instead of letting them float.
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*/
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pwm_enable(PWM_CH_LED_RED, 1);
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pwm_enable(PWM_CH_LED_GREEN, 1);
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set_color(LED_OFF);
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}
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DECLARE_HOOK(HOOK_INIT, led_init, HOOK_PRIO_DEFAULT);
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/**
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* Called by hook task every 250 ms
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*/
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static void led_tick(void)
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{
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static unsigned ticks;
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int chstate = charge_get_state();
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ticks++;
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/* If we don't control the LED, nothing to do */
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if (!led_auto_control_is_enabled(EC_LED_ID_BATTERY_LED))
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return;
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/* If charging error, blink orange, 25% duty cycle, 4 sec period */
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if (chstate == PWR_STATE_ERROR) {
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set_color((ticks % 16) < 4 ? LED_ORANGE : LED_OFF);
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return;
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}
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/* If charge-force-idle, blink green, 50% duty cycle, 2 sec period */
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if (chstate == PWR_STATE_IDLE &&
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(charge_get_flags() & CHARGE_FLAG_FORCE_IDLE)) {
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set_color((ticks & 0x4) ? LED_GREEN : LED_OFF);
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return;
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}
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/* If the system is charging, solid orange */
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if (chstate == PWR_STATE_CHARGE) {
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set_color(LED_ORANGE);
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return;
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}
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/* If AC connected and fully charged (or close to it), solid green */
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if (chstate == PWR_STATE_CHARGE_NEAR_FULL ||
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chstate == PWR_STATE_IDLE) {
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set_color(LED_GREEN);
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return;
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}
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/* Otherwise, system is off and AC not connected, LED off */
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set_color(LED_OFF);
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}
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DECLARE_HOOK(HOOK_TICK, led_tick, HOOK_PRIO_DEFAULT);
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