scarlet: initial mainboard

Copied board-related files from
gru folder and updated some minor changes
to make it compilable.
Will do more follow-up modification based on this work.

BUG=chrome-os-partner:62207, b:62307687
CQ-DEPEND=CL:524973, CL:524981, CL:524987
BRANCH=gru
TEST=make BOARD=scarlet

Change-Id: Ib508ef69e448028809276fe010c3f5fbef0500b4
Reviewed-on: https://chromium-review.googlesource.com/430965
Reviewed-by: Shawn N <shawnn@chromium.org>
Commit-Queue: Philip Chen <philipchen@chromium.org>
Tested-by: Philip Chen <philipchen@chromium.org>
(cherry picked from commit 63592fef936909fe97af487f4ded44b9daa5847f)
Reviewed-on: https://chromium-review.googlesource.com/524034
Commit-Ready: Philip Chen <philipchen@chromium.org>
Reviewed-by: Philip Chen <philipchen@chromium.org>

1 files changed, 146 insertions, 0 deletions

diff --git a/board/scarlet/battery.c b/board/scarlet/battery.c
new file mode 100644
index 0000000000..0e99f7bf6d
--- /dev/null
+++ b/board/scarlet/battery.c
@@ -0,0 +1,146 @@
+/* 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.
+ *
+ * Battery pack vendor provided charging profile
+ */
+
+#include "battery.h"
+#include "battery_smart.h"
+#include "charge_state.h"
+#include "console.h"
+#include "ec_commands.h"
+#include "extpower.h"
+#include "util.h"
+
+/* Shutdown mode parameter to write to manufacturer access register */
+#define SB_SHUTDOWN_DATA	0x0010
+
+static const struct battery_info info = {
+	.voltage_max		= 8688, /* 8700mA, round down for chg reg */
+	.voltage_normal		= 7600,
+	.voltage_min		= 5800,
+	.precharge_current	= 256,
+	.start_charging_min_c	= 0,
+	.start_charging_max_c	= 50,
+	.charging_min_c		= 0,
+	.charging_max_c		= 50,
+	.discharging_min_c	= -20,
+	.discharging_max_c	= 60,
+};
+
+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 EC_RES_ERROR;
+
+	rv = sb_write(SB_MANUFACTURER_ACCESS, SB_SHUTDOWN_DATA);
+	return rv ? EC_RES_ERROR : EC_RES_SUCCESS;
+}
+
+static int battery_not_disconnected;
+
+enum battery_disconnect_state battery_get_disconnect_state(void)
+{
+	uint8_t data[6];
+	int rv;
+
+	/*
+	 * Take note if we find that the battery isn't in disconnect state,
+	 * and always return NOT_DISCONNECTED without probing the battery.
+	 * This assumes the battery will not go to disconnect state during
+	 * runtime.
+	 */
+	if (battery_not_disconnected)
+		return BATTERY_NOT_DISCONNECTED;
+
+	if (extpower_is_present()) {
+		/* Check if battery charging + discharging is disabled. */
+		rv = sb_write(SB_MANUFACTURER_ACCESS, PARAM_OPERATION_STATUS);
+		if (rv)
+			return BATTERY_DISCONNECT_ERROR;
+
+		rv = sb_read_string(I2C_PORT_BATTERY, BATTERY_ADDR,
+				    SB_ALT_MANUFACTURER_ACCESS, data, 6);
+
+		if (rv || (~data[3] & (BATTERY_DISCHARGING_DISABLED |
+				       BATTERY_CHARGING_DISABLED))) {
+			battery_not_disconnected = 1;
+			return BATTERY_NOT_DISCONNECTED;
+		}
+
+		/*
+		 * Battery is neither charging nor discharging. Verify that
+		 * we didn't enter this state due to a safety fault.
+		 */
+		rv = sb_write(SB_MANUFACTURER_ACCESS, PARAM_SAFETY_STATUS);
+		if (rv)
+			return BATTERY_DISCONNECT_ERROR;
+
+		rv = sb_read_string(I2C_PORT_BATTERY, BATTERY_ADDR,
+				    SB_ALT_MANUFACTURER_ACCESS, data, 6);
+
+		if (rv || data[2] || data[3] || data[4] || data[5])
+			return BATTERY_DISCONNECT_ERROR;
+
+		/* No safety fault, battery is disconnected */
+		return BATTERY_DISCONNECTED;
+	}
+	battery_not_disconnected = 1;
+	return BATTERY_NOT_DISCONNECTED;
+}
+
+int charger_profile_override(struct charge_state_data *curr)
+{
+	const struct battery_info *batt_info = battery_get_info();
+	int now_discharging;
+
+	/* battery temp in 0.1 deg C */
+	int bat_temp_c = curr->batt.temperature - 2731;
+
+	if (curr->state == ST_CHARGE) {
+		/* Don't charge if outside of allowable temperature range */
+		if (bat_temp_c >= batt_info->charging_max_c * 10 ||
+		    bat_temp_c < batt_info->charging_min_c * 10) {
+			curr->requested_current = curr->requested_voltage = 0;
+			curr->batt.flags &= ~BATT_FLAG_WANT_CHARGE;
+			curr->state = ST_IDLE;
+			now_discharging = 0;
+		/* Don't start charging if battery is nearly full */
+		} else if ((curr->batt.status & STATUS_FULLY_CHARGED) &&
+			    battery_not_disconnected) {
+			curr->requested_current = curr->requested_voltage = 0;
+			curr->batt.flags &= ~BATT_FLAG_WANT_CHARGE;
+			curr->state = ST_DISCHARGE;
+			now_discharging = 1;
+		} else
+			now_discharging = 0;
+		charger_discharge_on_ac(now_discharging);
+	}
+
+	return 0;
+}
+
+/* Customs options controllable by host command. */
+#define PARAM_FASTCHARGE (CS_PARAM_CUSTOM_PROFILE_MIN + 0)
+
+enum ec_status charger_profile_override_get_param(uint32_t param,
+						  uint32_t *value)
+{
+	return EC_RES_INVALID_PARAM;
+}
+
+enum ec_status charger_profile_override_set_param(uint32_t param,
+						  uint32_t value)
+{
+	return EC_RES_INVALID_PARAM;
+}