Power and battery LED control for Falco.

BUG=chrome-os-partner:19914
BRANCH=falco
TEST=manual and constrained by hw issues.

Signed-off-by: Dave Parker <dparker@chromium.org>
Change-Id: Ief919c5ecf296ee358556d65260f245916c1ecb1
Reviewed-on: https://gerrit.chromium.org/gerrit/59513
Reviewed-by: Randall Spangler <rspangler@chromium.org>

3 files changed, 102 insertions, 1 deletions

diff --git a/board/falco/board.h b/board/falco/board.h
index 6490568dbf..8498cc0468 100644
--- a/board/falco/board.h
+++ b/board/falco/board.h
@@ -27,6 +27,7 @@
 #ifdef HAS_TASK_KEYPROTO
 #define CONFIG_KEYBOARD_PROTOCOL_8042
 #endif
+#define CONFIG_LED_FALCO
 #define CONFIG_LID_SWITCH
 #define CONFIG_LPC
 #define CONFIG_PECI
@@ -191,7 +192,6 @@ enum board_version {
 	BOARD_VERSION_EVT = 1,
 };
 
-
 #endif /* !__ASSEMBLER__ */
 
 #endif /* __BOARD_H */
diff --git a/common/build.mk b/common/build.mk
index 7cd213458b..59b271d2c6 100644
--- a/common/build.mk
+++ b/common/build.mk
@@ -35,6 +35,7 @@ common-$(CONFIG_IR357x)+=ir357x.o
 common-$(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_LID_SWITCH)+=lid_switch.o
 common-$(CONFIG_LP5562)+=lp5562.o lp5562_battery_led.o
 common-$(CONFIG_LPC)+=port80.o
diff --git a/common/led_falco.c b/common/led_falco.c
new file mode 100644
index 0000000000..eb7567e4f5
--- /dev/null
+++ b/common/led_falco.c
@@ -0,0 +1,100 @@
+/* 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 Falco.
+ */
+
+#include "battery.h"
+#include "board.h"
+#include "charge_state.h"
+#include "chipset.h"
+#include "extpower.h"
+#include "gpio.h"
+#include "hooks.h"
+
+enum led_color {
+	LED_OFF = 0,
+	LED_WHITE,
+	LED_AMBER,
+	LED_COLOR_COUNT  /* Number of colors, not a color itself */
+};
+
+static int bat_led_set_color(enum led_color color)
+{
+	switch (color) {
+	case LED_OFF:
+		gpio_set_level(GPIO_BAT_LED0, 1);
+		gpio_set_level(GPIO_BAT_LED1, 1);
+		break;
+	case LED_WHITE:
+		gpio_set_level(GPIO_BAT_LED0, 0);
+		gpio_set_level(GPIO_BAT_LED1, 1);
+		break;
+	case LED_AMBER:
+		gpio_set_level(GPIO_BAT_LED0, 1);
+		gpio_set_level(GPIO_BAT_LED1, 0);
+		break;
+	default:
+		return EC_ERROR_UNKNOWN;
+	}
+	return EC_SUCCESS;
+}
+
+static int pwr_led_set_color(enum led_color color)
+{
+	switch (color) {
+	case LED_OFF:
+		gpio_set_level(GPIO_PWR_LED_L, 1);
+		break;
+	case LED_WHITE:
+		gpio_set_level(GPIO_PWR_LED_L, 0);
+		break;
+	default:
+		return EC_ERROR_UNKNOWN;
+	}
+	return EC_SUCCESS;
+}
+
+/* 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_WHITE);
+	else if (chipset_in_state(CHIPSET_STATE_SUSPEND))
+		pwr_led_set_color((ticks & 0x4) ? LED_WHITE : LED_OFF);
+
+	/* Battery LED is solid white if AC connected, unless the battery is
+	 * is charging or there is an error. */
+	bat_led_set_color(extpower_is_present() ? LED_WHITE : LED_OFF);
+
+	switch (charge_get_state()) {
+	case PWR_STATE_IDLE:
+		if (chflags & CHARGE_FLAG_FORCE_IDLE)
+			bat_led_set_color((ticks & 0x4) ? LED_AMBER : LED_OFF);
+		else if (charge_get_percent() <= BATTERY_LEVEL_LOW)
+			bat_led_set_color((ticks & 0x4) ? LED_WHITE : LED_OFF);
+		else
+			bat_led_set_color(LED_WHITE);
+		break;
+	case PWR_STATE_CHARGE:
+	case PWR_STATE_CHARGE_NEAR_FULL:
+		bat_led_set_color(LED_AMBER);
+		break;
+	case PWR_STATE_ERROR:
+		bat_led_set_color((ticks & 0x2) ? LED_WHITE : LED_OFF);
+		break;
+	default:
+		/* Other states don't alter LED behavior */
+		break;
+	}
+}
+DECLARE_HOOK(HOOK_TICK, led_tick, HOOK_PRIO_DEFAULT);
+