1 files changed, 293 insertions, 0 deletions
diff --git a/board/atlas/battery.c b/board/atlas/battery.c
new file mode 100644
index 0000000000..d764367d0c
--- /dev/null
+++ b/board/atlas/battery.c
@@ -0,0 +1,293 @@
+/* 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.
+ *
+ * Placeholder values for temporary battery pack.
+ */
+
+#include "battery.h"
+#include "battery_smart.h"
+#include "bd9995x.h"
+#include "charge_ramp.h"
+#include "charge_state.h"
+#include "console.h"
+#include "ec_commands.h"
+#include "extpower.h"
+#include "gpio.h"
+#include "hooks.h"
+#include "i2c.h"
+#include "util.h"
+
+#define CPRINTS(format, args...) cprints(CC_CHARGER, format, ## args)
+
+/* Shutdown mode parameter to write to manufacturer access register */
+#define SB_SHUTDOWN_DATA	0x0010
+
+enum battery_type {
+	BATTERY_LG,
+	BATTERY_LISHEN,
+	BATTERY_SIMPLO,
+	BATTERY_TYPE_COUNT,
+};
+
+struct board_batt_params {
+	const char *manuf_name;
+	const struct battery_info *batt_info;
+};
+
+/*
+ * Set LISHEN as default since the LG precharge current level could cause the
+ * LISHEN battery to not accept charge when it's recovering from a fully
+ * discharged state.
+ */
+#define DEFAULT_BATTERY_TYPE BATTERY_LISHEN
+static enum battery_present batt_pres_prev = BP_NOT_SURE;
+static enum battery_type board_battery_type = BATTERY_TYPE_COUNT;
+
+/* Battery may delay reporting battery present */
+static int battery_report_present = 1;
+
+/*
+ * Battery info for LG A50. Note that the fields start_charging_min/max and
+ * charging_min/max are not used for the Eve charger. The effective temperature
+ * limits are given by discharging_min/max_c.
+ */
+static const struct battery_info batt_info_lg = {
+	.voltage_max		= TARGET_WITH_MARGIN(8800, 5), /* mV */
+	.voltage_normal		= 7700,
+	.voltage_min		= 6100, /* Add 100mV for charger accuracy */
+	.precharge_current	= 256,	/* mA */
+	.start_charging_min_c	= 0,
+	.start_charging_max_c	= 46,
+	.charging_min_c		= 10,
+	.charging_max_c		= 50,
+	.discharging_min_c	= 0,
+	.discharging_max_c	= 60,
+};
+
+/*
+ * Battery info for LISHEN. Note that the fields start_charging_min/max and
+ * charging_min/max are not used for the Eve charger. The effective temperature
+ * limits are given by discharging_min/max_c.
+ */
+static const struct battery_info batt_info_lishen = {
+	.voltage_max		= TARGET_WITH_MARGIN(8800, 5), /* mV */
+	.voltage_normal		= 7700,
+	.voltage_min		= 6100, /* Add 100mV for charger accuracy */
+	.precharge_current	= 256,	/* mA */
+	.start_charging_min_c	= 0,
+	.start_charging_max_c	= 46,
+	.charging_min_c		= 10,
+	.charging_max_c		= 50,
+	.discharging_min_c	= 0,
+	.discharging_max_c	= 60,
+};
+
+static const struct board_batt_params info[] = {
+	[BATTERY_LG] = {
+		.manuf_name = "LG A50",
+		.batt_info = &batt_info_lg,
+	},
+
+	[BATTERY_LISHEN] = {
+		.manuf_name = "Lishen A50",
+		.batt_info = &batt_info_lishen,
+	},
+
+	[BATTERY_SIMPLO] = {
+		.manuf_name = "Simplo A50",
+		.batt_info = &batt_info_lishen,
+	},
+
+};
+BUILD_ASSERT(ARRAY_SIZE(info) == BATTERY_TYPE_COUNT);
+
+/* Get type of the battery connected on the board */
+static int board_get_battery_type(void)
+{
+	char name[3];
+	int i;
+
+	if (!battery_manufacturer_name(name, sizeof(name))) {
+		for (i = 0; i < BATTERY_TYPE_COUNT; i++) {
+			if (!strncasecmp(name, info[i].manuf_name,
+					 ARRAY_SIZE(name)-1)) {
+				board_battery_type = i;
+				break;
+			}
+		}
+	}
+
+	return board_battery_type;
+}
+
+/*
+ * Initialize the battery type for the board.
+ *
+ * Very first battery info is called by the charger driver to initialize
+ * the charger parameters hence initialize the battery type for the board
+ * as soon as the I2C is initialized.
+ */
+static void board_init_battery_type(void)
+{
+	if (board_get_battery_type() != BATTERY_TYPE_COUNT)
+		CPRINTS("found batt: %s", info[board_battery_type].manuf_name);
+	else
+		CPRINTS("battery not found");
+}
+DECLARE_HOOK(HOOK_INIT, board_init_battery_type, HOOK_PRIO_INIT_I2C + 1);
+
+const struct battery_info *battery_get_info(void)
+{
+	return info[board_battery_type == BATTERY_TYPE_COUNT ?
+		    DEFAULT_BATTERY_TYPE : board_battery_type].batt_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;
+}
+
+int charger_profile_override(struct charge_state_data *curr)
+{
+	const struct battery_info *batt_info;
+	/* battery temp in 0.1 deg C */
+	int bat_temp_c = curr->batt.temperature - 2731;
+
+	batt_info = battery_get_info();
+	/* 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 = 0;
+		curr->requested_voltage = 0;
+		curr->batt.flags &= ~BATT_FLAG_WANT_CHARGE;
+		curr->state = ST_IDLE;
+	}
+	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;
+}
+
+enum battery_present battery_hw_present(void)
+{
+	/* The GPIO is low when the battery is physically present */
+	return gpio_get_level(GPIO_BATTERY_PRESENT_L) ? 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);
+
+/*
+ * Check for case where XDSG bit is set indicating that even
+ * though the FG can be read from the battery, the battery is not able to be
+ * charged or discharged. This situation will happen if a battery disconnect was
+ * intiaited via H1 setting the DISCONN signal to the battery. This will put the
+ * battery pack into a sleep state and when power is reconnected, the FG can be
+ * read, but the battery is still not able to provide power to the system. The
+ * calling function returns batt_pres = BP_NO, which instructs the charging
+ * state machine to prevent powering up the AP on battery alone which could lead
+ * to a brownout event when the battery isn't able yet to provide power to the
+ * system. .
+ */
+static int battery_check_disconnect(void)
+{
+	int rv;
+	uint8_t data[6];
+
+	/* Check if battery discharging is disabled. */
+	rv = sb_read_mfgacc(PARAM_OPERATION_STATUS,
+			    SB_ALT_MANUFACTURER_ACCESS, data, sizeof(data));
+	if (rv)
+		return BATTERY_DISCONNECT_ERROR;
+
+	if (data[3] & BATTERY_DISCHARGING_DISABLED)
+		return BATTERY_DISCONNECTED;
+
+	return BATTERY_NOT_DISCONNECTED;
+}
+
+/*
+ * Physical detection of battery.
+ */
+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 battery I2C fails but VBATT is high, battery is booting from
+	 * cut-off mode.
+	 *
+	 * FETs are turned off after Power Shutdown time.
+	 * The device will wake up when a voltage is applied to PACK.
+	 * Battery status will be inactive until it is initialized.
+	 */
+	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;
+	} else if (batt_pres == BP_YES && batt_pres_prev == BP_NO &&
+		   !battery_report_present_timer_started) {
+		/*
+		 * Wait 1 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, SECOND);
+	}
+
+	if (!battery_report_present)
+		batt_pres = BP_NO;
+
+	batt_pres_prev = batt_pres;
+
+	return batt_pres;
+}
+
+int board_battery_initialized(void)
+{
+	return battery_hw_present() == batt_pres_prev;
+}