Power and battery LED control for Peppy.

BUG=chrome-os-partner:20328
BRANCH=peppy
TEST=manual and constrained by hw issues.

Change-Id: I7df19ad410ef2a85c170980150bf226a7407642e
Signed-off-by: Dave Parker <dparker@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/59663
Reviewed-by: Shawn Nematbakhsh <shawnn@chromium.org>

3 files changed, 99 insertions, 0 deletions

diff --git a/board/peppy/board.h b/board/peppy/board.h
index d77f2d3990..56af4a08a9 100644
--- a/board/peppy/board.h
+++ b/board/peppy/board.h
@@ -27,6 +27,7 @@
 #ifdef HAS_TASK_KEYPROTO
 #define CONFIG_KEYBOARD_PROTOCOL_8042
 #endif
+#define CONFIG_LED_PEPPY
 #define CONFIG_LID_SWITCH
 #define CONFIG_LPC
 #define CONFIG_PECI
diff --git a/common/build.mk b/common/build.mk
index f4dc6e95aa..694dbdafa3 100644
--- a/common/build.mk
+++ b/common/build.mk
@@ -37,6 +37,7 @@ common-$(CONFIG_KEYBOARD_PROTOCOL_8042)+=keyboard_8042.o
 common-$(CONFIG_KEYBOARD_PROTOCOL_MKBP)+=keyboard_mkbp.o
 common-$(CONFIG_KEYBOARD_TEST)+=keyboard_test.o
 common-$(CONFIG_LED_FALCO)+=led_falco.o
+common-$(CONFIG_LED_PEPPY)+=led_peppy.o
 common-$(CONFIG_LID_SWITCH)+=lid_switch.o
 common-$(CONFIG_LP5562)+=lp5562.o lp5562_battery_led.o
 common-$(CONFIG_LPC)+=port80.o
diff --git a/common/led_peppy.c b/common/led_peppy.c
new file mode 100644
index 0000000000..b6d3afd906
--- /dev/null
+++ b/common/led_peppy.c
@@ -0,0 +1,97 @@
+/* Copyright (c) 2013 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 and battery LED control for Peppy.
+ */
+
+#include "battery.h"
+#include "board.h"
+#include "charge_state.h"
+#include "chipset.h"
+#include "gpio.h"
+#include "hooks.h"
+
+#define LED_TOTAL_TICKS 16
+#define LED_ON_TICKS 4
+
+enum led_color {
+	LED_OFF = 0,
+	LED_BLUE,
+	LED_AMBER,
+	LED_COLOR_COUNT  /* Number of colors, not a color itself */
+};
+
+static int led_set_color(enum led_color color, enum gpio_signal gpio_led_blue_l,
+			 enum gpio_signal gpio_led_amber_l)
+{
+	switch (color) {
+	case LED_OFF:
+		gpio_set_level(gpio_led_blue_l,  1);
+		gpio_set_level(gpio_led_amber_l, 1);
+		break;
+	case LED_BLUE:
+		gpio_set_level(gpio_led_blue_l,  0);
+		gpio_set_level(gpio_led_amber_l, 1);
+		break;
+	case LED_AMBER:
+		gpio_set_level(gpio_led_blue_l,  1);
+		gpio_set_level(gpio_led_amber_l, 0);
+		break;
+	default:
+		return EC_ERROR_UNKNOWN;
+	}
+	return EC_SUCCESS;
+}
+
+static int bat_led_set_color(enum led_color color)
+{
+	return led_set_color(color, GPIO_BAT_LED0_L, GPIO_BAT_LED1_L);
+}
+
+static int pwr_led_set_color(enum led_color color)
+{
+	return led_set_color(color, GPIO_PWR_LED0_L, GPIO_PWR_LED1_L);
+}
+
+/* Called by hook task every 250mSec */
+static void led_tick(void)
+{
+	static int ticks;
+	uint32_t chflags = charge_get_flags();
+
+	ticks++;
+
+	if (chipset_in_state(CHIPSET_STATE_ANY_OFF))
+		pwr_led_set_color(LED_OFF);
+	else if (chipset_in_state(CHIPSET_STATE_ON))
+		pwr_led_set_color(LED_BLUE);
+	else if (chipset_in_state(CHIPSET_STATE_SUSPEND))
+		/* Blink once every four seconds. */
+		pwr_led_set_color((ticks % LED_TOTAL_TICKS < LED_ON_TICKS) ?
+			LED_AMBER : LED_OFF);
+
+	switch (charge_get_state()) {
+	case PWR_STATE_CHARGE:
+	case PWR_STATE_CHARGE_NEAR_FULL:
+		bat_led_set_color(LED_AMBER);
+		break;
+	case PWR_STATE_DISCHARGE:
+		bat_led_set_color(LED_OFF);
+		break;
+	case PWR_STATE_ERROR:
+		bat_led_set_color((ticks & 0x2) ? LED_AMBER : LED_OFF);
+		break;
+	case PWR_STATE_IDLE: /* External power connected in IDLE state. */
+		if (chflags & CHARGE_FLAG_FORCE_IDLE)
+			bat_led_set_color((ticks & 0x4) ? LED_BLUE : LED_OFF);
+		else
+			bat_led_set_color(LED_BLUE);
+		break;
+	default:
+		/* Other states don't alter LED behavior */
+		break;
+	}
+}
+DECLARE_HOOK(HOOK_TICK, led_tick, HOOK_PRIO_DEFAULT);
+