diff options
Diffstat (limited to 'board/kevin/led.c')
| -rw-r--r-- | board/kevin/led.c | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/board/kevin/led.c b/board/kevin/led.c new file mode 100644 index 0000000000..a3a10935a7 --- /dev/null +++ b/board/kevin/led.c @@ -0,0 +1,171 @@ +/* Copyright 2016 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. + * + * Power/Battery LED control for Kevin + */ + +#include "charge_state.h" +#include "chipset.h" +#include "console.h" +#include "extpower.h" +#include "gpio.h" +#include "hooks.h" +#include "led_common.h" +#include "pwm.h" +#include "registers.h" +#include "util.h" + +#define CPRINTF(format, args...) cprintf(CC_PWM, format, ## args) +#define CPRINTS(format, args...) cprints(CC_PWM, format, ## args) + +#define LED_TOTAL_TICKS 16 +#define LED_ON_TICKS 8 + +static int led_debug; + +const enum ec_led_id supported_led_ids[] = { + EC_LED_ID_POWER_LED, EC_LED_ID_BATTERY_LED}; +const int supported_led_ids_count = ARRAY_SIZE(supported_led_ids); + +enum led_color { + LED_OFF = 0, + LED_RED, + LED_GREEN, + LED_BLUE, + + /* Number of colors, not a color itself */ + LED_COLOR_COUNT +}; + +/* Brightness vs. color, in the order of off, red, green and blue */ +static const uint8_t color_brightness[LED_COLOR_COUNT][3] = { + /* {Red, Blue, Green}, */ + [LED_OFF] = {100, 100, 100}, + [LED_RED] = {90, 100, 100}, + [LED_GREEN] = {100, 100, 80}, + [LED_BLUE] = {100, 80, 100}, +}; + +/** + * Set LED color + * + * @param color Enumerated color value + */ +static void set_color(enum led_color color) +{ + pwm_set_duty(PWM_CH_LED_RED, color_brightness[color][0]); + pwm_set_duty(PWM_CH_LED_BLUE, color_brightness[color][1]); + pwm_set_duty(PWM_CH_LED_GREEN, color_brightness[color][2]); +} + +void led_get_brightness_range(enum ec_led_id led_id, uint8_t *brightness_range) +{ + brightness_range[EC_LED_COLOR_RED] = 100; + brightness_range[EC_LED_COLOR_BLUE] = 100; + brightness_range[EC_LED_COLOR_GREEN] = 100; +} + +int led_set_brightness(enum ec_led_id led_id, const uint8_t *brightness) +{ + pwm_set_duty(PWM_CH_LED_RED, brightness[EC_LED_COLOR_RED]); + pwm_set_duty(PWM_CH_LED_BLUE, brightness[EC_LED_COLOR_BLUE]); + pwm_set_duty(PWM_CH_LED_GREEN, brightness[EC_LED_COLOR_GREEN]); + return EC_SUCCESS; +} + +static void kevin_led_set_power_battery(void) +{ + static int power_ticks; + + if (chipset_in_state(CHIPSET_STATE_ON)) { + set_color(LED_BLUE); + return; + } + + /* CHIPSET_STATE_OFF */ + switch (charge_get_state()) { + case PWR_STATE_DISCHARGE: + set_color(LED_OFF); + break; + case PWR_STATE_CHARGE: + set_color(LED_RED); + break; + case PWR_STATE_ERROR: + power_ticks++; + set_color((power_ticks % LED_TOTAL_TICKS) \ + < (LED_ON_TICKS) ? LED_RED : LED_GREEN); + break; + case PWR_STATE_CHARGE_NEAR_FULL: + case PWR_STATE_IDLE: /* External power connected in IDLE. */ + set_color(LED_GREEN); + break; + default: + set_color(LED_RED); + break; + } + if ((charge_get_state()) != PWR_STATE_ERROR) + power_ticks = 0; +} + +static void led_init(void) +{ + /* + * Enable PWMs and set to 0% duty cycle. If they're disabled, + * seems to ground the pins instead of letting them float. + */ + pwm_enable(PWM_CH_LED_RED, 1); + pwm_enable(PWM_CH_LED_GREEN, 1); + pwm_enable(PWM_CH_LED_BLUE, 1); + + set_color(LED_OFF); +} +/* After pwm_pin_init() */ +DECLARE_HOOK(HOOK_INIT, led_init, HOOK_PRIO_INIT_PWM + 2); + +/** + * Called by hook task every 250 ms + */ +static void led_tick(void) +{ + if (led_debug) + return; + + if (led_auto_control_is_enabled(EC_LED_ID_POWER_LED) && + led_auto_control_is_enabled(EC_LED_ID_BATTERY_LED)) { + kevin_led_set_power_battery(); + return; + } + + set_color(LED_OFF); +} +DECLARE_HOOK(HOOK_TICK, led_tick, HOOK_PRIO_DEFAULT); + +/******************************************************************/ +/* Console commands */ +static int command_led_color(int argc, char **argv) +{ + if (argc > 1) { + if (!strcasecmp(argv[1], "debug")) { + led_debug ^= 1; + CPRINTF("led_debug = %d\n", led_debug); + } else if (!strcasecmp(argv[1], "off")) { + set_color(LED_OFF); + } else if (!strcasecmp(argv[1], "red")) { + set_color(LED_RED); + } else if (!strcasecmp(argv[1], "green")) { + set_color(LED_GREEN); + } else if (!strcasecmp(argv[1], "blue")) { + set_color(LED_BLUE); + } else { + /* maybe handle charger_discharge_on_ac() too? */ + return EC_ERROR_PARAM1; + } + } + + return EC_SUCCESS; +} +DECLARE_CONSOLE_COMMAND(ledcolor, command_led_color, + "[debug|red|green|blue|off]", + "Change LED color", + NULL); |