1 files changed, 126 insertions, 0 deletions
diff --git a/baseboard/grunt/battery.c b/baseboard/grunt/battery.c
new file mode 100644
index 0000000000..8c9755daac
--- /dev/null
+++ b/baseboard/grunt/battery.c
@@ -0,0 +1,126 @@
+/* Copyright 2018 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 pack vendor provided charging profile
+ */
+
+#include "battery.h"
+#include "battery_smart.h"
+#include "console.h"
+#include "extpower.h"
+#include "gpio.h"
+#include "hooks.h"
+#include "timer.h"
+
+#define CPRINTS(format, args...) cprints(CC_CHARGER, format, ## args)
+
+/* Shutdown mode parameter to write to manufacturer access register */
+#define SB_SHUTDOWN_DATA	0x0010
+
+static enum battery_present batt_pres_prev = BP_NOT_SURE;
+
+/* Battery may delay reporting battery present */
+static int battery_report_present = 1;
+
+static const struct battery_info info = {
+	.voltage_max = 13200, /* mV */
+	.voltage_normal = 11550,
+	.voltage_min = 9000,
+	.precharge_current = 256, /* mA */
+	.start_charging_min_c = 0,
+	.start_charging_max_c = 50,
+	.charging_min_c = 0,
+	.charging_max_c = 60,
+	.discharging_min_c = -20,
+	.discharging_max_c = 75,
+};
+
+const struct battery_info *battery_get_info(void)
+{
+	return &info;
+}
+
+int board_cut_off_battery(void)
+{
+	int rv;
+	/* Ship mode command must be sent twice to take effect */
+	rv = sb_write(SB_MANUFACTURER_ACCESS, SB_SHUTDOWN_DATA);
+	if (rv != EC_SUCCESS)
+		return rv;
+	return sb_write(SB_MANUFACTURER_ACCESS, SB_SHUTDOWN_DATA);
+}
+
+enum battery_present battery_hw_present(void)
+{
+	/* The GPIO is low when the battery is physically present */
+	return gpio_get_level(GPIO_EC_BATT_PRES_ODL) ? BP_NO : BP_YES;
+}
+
+static int battery_init(void)
+{
+	int batt_status;
+
+	return battery_status(&batt_status) ? 0 :
+		!!(batt_status & STATUS_INITIALIZED);
+}
+
+/* Allow booting now that the battery has woke up */
+static void battery_now_present(void)
+{
+	CPRINTS("battery will now report present");
+	battery_report_present = 1;
+}
+DECLARE_DEFERRED(battery_now_present);
+
+static int battery_check_disconnect(void)
+{
+	/* TODO(ecgh): Read the status of charge/discharge FETs */
+	return BATTERY_NOT_DISCONNECTED;
+}
+
+enum battery_present battery_is_present(void)
+{
+	enum battery_present batt_pres;
+	static int battery_report_present_timer_started;
+
+	/* Get the physical hardware status */
+	batt_pres = battery_hw_present();
+
+	/*
+	 * Make sure battery status is implemented, I2C transactions are
+	 * success & the battery status is Initialized to find out if it
+	 * is a working battery and it is not in the cut-off mode.
+	 */
+	if (batt_pres == BP_YES && batt_pres_prev != batt_pres &&
+	    (battery_is_cut_off() != BATTERY_CUTOFF_STATE_NORMAL ||
+	     battery_check_disconnect() != BATTERY_NOT_DISCONNECTED ||
+	     battery_init() == 0)) {
+		battery_report_present = 0;
+		/*
+		 * When this path is taken, the _timer_started flag must be
+		 * reset so the 'else if' path will be entered and the
+		 * battery_report_present flag can be set by the deferred
+		 * call. This handles the case of the battery being disconected
+		 * and reconnected while running or if battery_init() returns an
+		 * error due to a failed sb_read.
+		 */
+		battery_report_present_timer_started = 0;
+	}  else if (batt_pres == BP_YES && batt_pres_prev == BP_NO &&
+		   !battery_report_present_timer_started) {
+		/*
+		 * Wait 1/2 second before reporting present if it was
+		 * previously reported as not present
+		 */
+		battery_report_present_timer_started = 1;
+		battery_report_present = 0;
+		hook_call_deferred(&battery_now_present_data, 500 * MSEC);
+	}
+
+	if (!battery_report_present)
+		batt_pres = BP_NO;
+
+	batt_pres_prev = batt_pres;
+
+	return batt_pres;
+}