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/* Copyright 2019 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*
* Battery LED control for Flapjack board.
*/
#include "battery.h"
#include "charge_state.h"
#include "console.h"
#include "driver/charger/rt946x.h"
#include "hooks.h"
#include "led_common.h"
#include "util.h"
/* Define this to enable led command and debug LED */
#undef DEBUG_LED
const enum ec_led_id supported_led_ids[] = { EC_LED_ID_BATTERY_LED };
const int supported_led_ids_count = ARRAY_SIZE(supported_led_ids);
#define LED_OFF MT6370_LED_ID_OFF
#define LED_RED MT6370_LED_ID1
#define LED_GRN MT6370_LED_ID2
#define LED_BLU MT6370_LED_ID3
#define LED_MASK_OFF 0
#define LED_MASK_RED MT6370_MASK_RGB_ISNK1DIM_EN
#define LED_MASK_GRN MT6370_MASK_RGB_ISNK2DIM_EN
#define LED_MASK_BLU MT6370_MASK_RGB_ISNK3DIM_EN
static enum charge_state chstate;
static void led_set_battery(void)
{
static enum charge_state prev = PWR_STATE_UNCHANGE;
static int battery_second;
int red = 0, grn = 0, blu = 0;
battery_second++;
#ifndef DEBUG_LED
chstate = charge_get_state();
#endif
if (chstate == prev)
return;
prev = chstate;
/*
* Full White
* Charging Amber
* Error Red
*/
switch (chstate) {
case PWR_STATE_CHARGE:
/* RGB(current, duty) = (4mA,10/32) (4mA,1/32) (0mA,) */
red = 1;
grn = 1;
mt6370_led_set_pwm_dim_duty(LED_RED, 9);
mt6370_led_set_pwm_dim_duty(LED_GRN, 0);
break;
case PWR_STATE_DISCHARGE:
/* RGB(current, duty) = (0mA,) (0mA,) (0mA,) */
break;
case PWR_STATE_ERROR:
/* RGB(current, duty) = (4mA,8/32) (0mA,) (0mA,) */
red = 1;
mt6370_led_set_pwm_dim_duty(LED_RED, 7);
break;
case PWR_STATE_CHARGE_NEAR_FULL:
/* RGB(current, duty) = (8mA,2/32) (8mA,1/32) (4mA,1/32) */
red = 2;
grn = 2;
blu = 1;
mt6370_led_set_pwm_dim_duty(LED_RED, 1);
mt6370_led_set_pwm_dim_duty(LED_GRN, 0);
mt6370_led_set_pwm_dim_duty(LED_BLU, 0);
break;
default:
/* Other states don't alter LED behavior */
return;
}
mt6370_led_set_brightness(LED_RED, red);
mt6370_led_set_brightness(LED_GRN, grn);
mt6370_led_set_brightness(LED_BLU, blu);
}
void led_get_brightness_range(enum ec_led_id led_id, uint8_t *brightness_range)
{
/* Current is fixed at 4mA. Brightness is controlled by duty only. */
const uint8_t max = MT6370_LED_PWM_DIMDUTY_MAX;
if (led_id != EC_LED_ID_BATTERY_LED)
return;
brightness_range[EC_LED_COLOR_GREEN] = max;
brightness_range[EC_LED_COLOR_RED] = max;
brightness_range[EC_LED_COLOR_BLUE] = max;
}
static void set_current_and_pwm_duty(uint8_t brightness,
enum mt6370_led_index color)
{
if (brightness) {
/* Current is fixed at 4mA. Brightness is controlled by duty. */
mt6370_led_set_brightness(color, 1);
mt6370_led_set_pwm_dim_duty(color, brightness);
} else {
/* off */
mt6370_led_set_brightness(color, 0);
}
}
int led_set_brightness(enum ec_led_id led_id, const uint8_t *brightness)
{
if (led_id != EC_LED_ID_BATTERY_LED)
return EC_ERROR_INVAL;
set_current_and_pwm_duty(brightness[EC_LED_COLOR_RED], LED_RED);
set_current_and_pwm_duty(brightness[EC_LED_COLOR_GREEN], LED_GRN);
set_current_and_pwm_duty(brightness[EC_LED_COLOR_BLUE], LED_BLU);
return EC_SUCCESS;
}
static void flapjack_led_init(void)
{
const enum mt6370_led_dim_mode dim = MT6370_LED_DIM_MODE_PWM;
const enum mt6370_led_pwm_freq freq = MT6370_LED_PWM_FREQ1000;
mt6370_led_set_color(LED_MASK_RED | LED_MASK_GRN | LED_MASK_BLU);
mt6370_led_set_dim_mode(LED_RED, dim);
mt6370_led_set_dim_mode(LED_GRN, dim);
mt6370_led_set_dim_mode(LED_BLU, dim);
mt6370_led_set_pwm_frequency(LED_RED, freq);
mt6370_led_set_pwm_frequency(LED_GRN, freq);
mt6370_led_set_pwm_frequency(LED_BLU, freq);
}
DECLARE_HOOK(HOOK_INIT, flapjack_led_init, HOOK_PRIO_DEFAULT);
/* Called by hook task every 1 sec */
static void led_second(void)
{
if (led_auto_control_is_enabled(EC_LED_ID_BATTERY_LED))
led_set_battery();
}
DECLARE_HOOK(HOOK_SECOND, led_second, HOOK_PRIO_DEFAULT);
#ifdef DEBUG_LED
static int command_led(int argc, char **argv)
{
int val;
char *e;
mt6370_led_set_color(LED_MASK_RED|LED_MASK_GRN|LED_MASK_BLU);
if (argc == 2) {
val = strtoi(argv[1], &e, 0);
if (*e)
return EC_ERROR_PARAM1;
chstate = val;
return EC_SUCCESS;
}
if (argc < 4)
return EC_ERROR_PARAM_COUNT;
val = strtoi(argv[1], &e, 0);
if (*e)
return EC_ERROR_PARAM1;
mt6370_led_set_brightness(LED_RED, val);
val = strtoi(argv[2], &e, 0);
if (*e)
return EC_ERROR_PARAM2;
mt6370_led_set_brightness(LED_GRN, val);
val = strtoi(argv[3], &e, 0);
if (*e)
return EC_ERROR_PARAM3;
mt6370_led_set_brightness(LED_BLU, val);
return EC_SUCCESS;
}
DECLARE_CONSOLE_COMMAND(led, command_led, "<chg_state> or <R> <G> <B>", NULL);
#endif
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