oak: add initial support for oak board rev1

Add initial support for Oak rev1 board. This is just the
EC and includes battery charging but does not include
USB PD.

BUG=none
BRANCH=none
TEST=load on oak board and get console

Signed-off-by: Rong Chang <rongchang@chromium.org>
Signed-off-by: Alec Berg <alecaberg@chromium.org>
Change-Id: I626f3921025fbc39ba22b04eeb6dd1084cd70777
Reviewed-on: https://chromium-review.googlesource.com/261678

1 files changed, 137 insertions, 0 deletions

diff --git a/board/oak/led.c b/board/oak/led.c
new file mode 100644
index 0000000000..7c11ff2155
--- /dev/null
+++ b/board/oak/led.c
@@ -0,0 +1,137 @@
+/* Copyright 2015 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 and Power LED control for LLAMA Board.
+ */
+
+#include "battery.h"
+#include "charge_state.h"
+#include "chipset.h"
+#include "gpio.h"
+#include "hooks.h"
+#include "led_common.h"
+#include "util.h"
+
+const enum ec_led_id supported_led_ids[] = {
+	EC_LED_ID_BATTERY_LED
+};
+
+const int supported_led_ids_count = ARRAY_SIZE(supported_led_ids);
+
+enum led_color {
+	LED_GREEN = 0,
+	LED_ORANGE,
+	LED_COLOR_COUNT		/* Number of colors, not a color itself */
+};
+
+static int bat_led_set(enum led_color color, int on)
+{
+	switch (color) {
+	case LED_GREEN:
+		gpio_set_level(GPIO_BAT_LED0, on ? 0 : 1);
+		break;
+	case LED_ORANGE:
+		gpio_set_level(GPIO_BAT_LED1, on ? 0 : 1);
+		break;
+	default:
+		return EC_ERROR_UNKNOWN;
+	}
+	return EC_SUCCESS;
+}
+
+void led_get_brightness_range(enum ec_led_id led_id, uint8_t *brightness_range)
+{
+	/* Ignoring led_id as both leds support the same colors */
+	brightness_range[EC_LED_COLOR_GREEN] = 1;
+	brightness_range[EC_LED_COLOR_YELLOW] = 1;
+}
+
+int led_set_brightness(enum ec_led_id led_id, const uint8_t *brightness)
+{
+	if (EC_LED_ID_BATTERY_LED == led_id) {
+		if (brightness[EC_LED_COLOR_GREEN] != 0) {
+			bat_led_set(LED_GREEN, 1);
+			bat_led_set(LED_ORANGE, 0);
+		} else if (brightness[EC_LED_COLOR_YELLOW] != 0) {
+			bat_led_set(LED_GREEN, 1);
+			bat_led_set(LED_ORANGE, 1);
+		} else {
+			bat_led_set(LED_GREEN, 0);
+			bat_led_set(LED_ORANGE, 0);
+		}
+		return EC_SUCCESS;
+	} else {
+		return EC_ERROR_UNKNOWN;
+	}
+}
+
+static void oak_led_set_power(void)
+{
+	static int power_second;
+
+	power_second++;
+
+	/* PWR LED behavior:
+	 * Power on: Green
+	 * Suspend: Green in breeze mode ( 1 sec on/ 3 sec off)
+	 * Power off: OFF
+	 */
+	if (chipset_in_state(CHIPSET_STATE_ANY_OFF))
+		bat_led_set(LED_GREEN, 0);
+	else if (chipset_in_state(CHIPSET_STATE_ON))
+		bat_led_set(LED_GREEN, 1);
+	else if (chipset_in_state(CHIPSET_STATE_SUSPEND))
+		bat_led_set(LED_GREEN, (power_second & 3) ? 0 : 1);
+}
+
+static void oak_led_set_battery(void)
+{
+	static int battery_second;
+
+	battery_second++;
+
+	/* BAT LED behavior:
+	 * Fully charged / idle: Off
+	 * Under charging: Orange
+	 * Battery low (10%): Orange in breeze mode (1 sec on, 3 sec off)
+	 * Battery critical low (less than 3%) or abnormal battery
+	 *     situation: Orange in blinking mode (1 sec on, 1 sec off)
+	 * Using battery or not connected to AC power: OFF
+	 */
+	switch (charge_get_state()) {
+	case PWR_STATE_CHARGE:
+		bat_led_set(LED_ORANGE, 1);
+		break;
+	case PWR_STATE_CHARGE_NEAR_FULL:
+		bat_led_set(LED_ORANGE, 1);
+		break;
+	case PWR_STATE_DISCHARGE:
+		if (charge_get_percent() < 3)
+			bat_led_set(LED_ORANGE, (battery_second & 1) ? 0 : 1);
+		else if (charge_get_percent() < 10)
+			bat_led_set(LED_ORANGE, (battery_second & 3) ? 0 : 1);
+		else
+			bat_led_set(LED_ORANGE, 0);
+		break;
+	case PWR_STATE_ERROR:
+		bat_led_set(LED_ORANGE, (battery_second & 1) ? 0 : 1);
+		break;
+	case PWR_STATE_IDLE:	/* External power connected in IDLE. */
+		bat_led_set(LED_ORANGE, 0);
+		break;
+	default:
+		/* Other states don't alter LED behavior */
+		break;
+	}
+}
+
+/**  * Called by hook task every 1 sec  */
+static void led_second(void)
+{
+	if (led_auto_control_is_enabled(EC_LED_ID_POWER_LED))
+		oak_led_set_power();
+	if (led_auto_control_is_enabled(EC_LED_ID_BATTERY_LED))
+		oak_led_set_battery();
+}
+DECLARE_HOOK(HOOK_SECOND, led_second, HOOK_PRIO_DEFAULT);