Sasukette: add battery swelling function

According to OEM request, add battery swelling function.
1. modify voltage_max 8800mV according to battery spec
2. modify charging_max_c = 50 according to swelling request
3. add battery swelling function

BUG=b:187441287
BRANCH=dedede
TEST=make -j BOARD=sasukette
TEST=test department test swelling function pass

Signed-off-by: Mike Lee <mike5@huaqin.corp-partner.google.com>
Change-Id: Ie6dedff3df071e5abbece4a00133f1c5663acbf1
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2883379
Reviewed-by: Aseda Aboagye <aaboagye@chromium.org>
Commit-Queue: Aseda Aboagye <aaboagye@chromium.org>

2 files changed, 175 insertions, 3 deletions

diff --git a/board/sasukette/battery.c b/board/sasukette/battery.c
index 9e85906b9b..10d4187c15 100644
--- a/board/sasukette/battery.c
+++ b/board/sasukette/battery.c
@@ -51,14 +51,14 @@ const struct board_batt_params board_battery_info[] = {
 			}
 		},
 		.batt_info = {
-			.voltage_max		= 8860,
+			.voltage_max		= 8800,
 			.voltage_normal		= 7700, /* mV */
 			.voltage_min		= 6000, /* mV */
 			.precharge_current	= 200,	/* mA */
 			.start_charging_min_c	= 0,
 			.start_charging_max_c	= 45,
 			.charging_min_c		= 0,
-			.charging_max_c		= 60,
+			.charging_max_c		= 50,
 			.discharging_min_c	= -20,
 			.discharging_max_c	= 70,
 		},
@@ -68,9 +68,180 @@ BUILD_ASSERT(ARRAY_SIZE(board_battery_info) == BATTERY_TYPE_COUNT);
 
 const enum battery_type DEFAULT_BATTERY_TYPE = BATTERY_SDI;
 
+static int swelling_flag = -1;
+static int prev_ac = -1;
+static int charger_flag = -1;
+
+enum swelling_data {
+	SWELLING_TRIGGER_5 = 1,
+	SWELLING_TRIGGER_15,
+	SWELLING_TRIGGER_45,
+	SWELLING_TRIGGER_50,
+	SWELLING_RECOVERY_10,
+	SWELLING_RECOVERY_20,
+	SWELLING_RECOVERY_50,
+	SWELLING_DATA_COUNT
+};
+
 int charger_profile_override(struct charge_state_data *curr)
 {
-	curr->requested_voltage += 100;
+	static timestamp_t chargeCnt;
+	int bat_temp_c = (curr->batt.temperature - 2731) / 10;
+
+	/*
+	 *	start charge temp control
+	 *
+	 *	if bat_temp >= 45 or bat_temp <= 0 when adapter plugging in,
+	 *	stop charge
+	 *	if 0 < bat_temp < 45 when adapter plugging in, charge normal
+	 */
+	if (curr->ac != prev_ac) {
+		if (curr->ac) {
+			if ((bat_temp_c <= 0) || (bat_temp_c >= 45))
+				charger_flag = 1;
+		}
+		prev_ac = curr->ac;
+	}
+
+	if (charger_flag) {
+		curr->requested_current = 0;
+		curr->requested_voltage = 0;
+		curr->batt.flags &= ~BATT_FLAG_WANT_CHARGE;
+		curr->state = ST_IDLE;
+	}
+
+	if ((bat_temp_c > 0) && (bat_temp_c < 45))
+		charger_flag = 0;
+
+/*
+ *	battery swelling control
+ *
+ *	trigger condition		|	recovery condition
+ *	1. bat_temp < 5 &&		|	1.batt_temp >= 10
+ *	bat_cell_voltage < 4.15		|
+ *					|	cv = (cell CV-50mv)*series
+ *	cv = 4150mv*series = 8300mv	|	   = 8700mv
+ *	cc = FCC*C_rate*0.4		|	cc = FCC*C_rate*0.4 = 1464ma
+ *					|
+ *	2. bat_temp < 15 &&		|	2.batt_temp >= 20,
+ *	bat_cell_voltage < 4.15		|
+ *					|	cv = (cell CV-50mv)*series
+ *	cv = 4150mv*series = 8300mv	|	   = 8700mv
+ *	cc = FCC*C_rate*0.4= 1464ma	|	cc = FCC*C_rate*0.9 = 3294ma
+ *					|
+ *	3. bat_temp >= 45 &&		|	3. batt_temp < 43
+ *	bat_cell_voltage < 4.15		|
+ *					|	cv = (cell CV-50mv)*series
+ *	cv = 4150mv*series = 8300mv	|	   = 8700mv
+ *	cc = FCC*C_rate*0.45= 1647ma	|	cc = FCC*C_rate*0.9 = 3294ma
+ *					|
+ *	4. bat_temp >= 50		|	4.batt_temp < 45,
+ *	stop charge			|	recovery charge
+ */
+	if (curr->ac && !charger_flag) {
+
+		/*
+		 * battery swelling trigger condition
+		 */
+		if (curr->batt.voltage < 8300) {
+			if (bat_temp_c < 5)
+				swelling_flag = SWELLING_TRIGGER_5;
+			else if (bat_temp_c < 15)
+				swelling_flag = SWELLING_TRIGGER_15;
+
+			if (bat_temp_c >= 50)
+				swelling_flag = SWELLING_TRIGGER_50;
+			else if (bat_temp_c >= 45) {
+				if (!(swelling_flag & SWELLING_TRIGGER_50))
+					swelling_flag = SWELLING_TRIGGER_45;
+			}
+		}
+
+		/*
+		 * battery swelling recovery condition
+		 */
+		if (swelling_flag) {
+			if ((bat_temp_c >= 10) && (bat_temp_c < 20))
+				swelling_flag = SWELLING_RECOVERY_10;
+			else if ((bat_temp_c >= 20) && (bat_temp_c < 43))
+				swelling_flag = SWELLING_RECOVERY_20;
+			else if ((bat_temp_c >= 43) && (bat_temp_c < 45))
+				swelling_flag = SWELLING_RECOVERY_50;
+		}
+
+		switch (swelling_flag) {
+		case SWELLING_TRIGGER_5:
+			curr->requested_voltage = 4150 * 2;
+			curr->requested_current = 5230 * 0.7 * 0.4;
+
+			if ((curr->batt.current < 300)) {
+				if (chargeCnt.val == 0) {
+					chargeCnt.val = get_time().val
+							+ 30 * SECOND;
+				} else if (timestamp_expired(chargeCnt, NULL)) {
+					curr->requested_current = 0;
+					curr->requested_voltage = 0;
+					curr->batt.flags &=
+							~BATT_FLAG_WANT_CHARGE;
+					curr->state = ST_IDLE;
+				}
+			} else {
+				chargeCnt.val = 0;
+			}
+			break;
+
+		case SWELLING_TRIGGER_15:
+			curr->requested_current = 5230 * 0.7 * 0.4;
+			chargeCnt.val = 0;
+			break;
+
+		case SWELLING_TRIGGER_45:
+			curr->requested_voltage = 4150 * 2;
+			curr->requested_current = 5230 * 0.7 * 0.45;
+
+			if ((curr->batt.current < 300)) {
+				if (chargeCnt.val == 0) {
+					chargeCnt.val = get_time().val
+							+ 30 * SECOND;
+				} else if (timestamp_expired(chargeCnt, NULL)) {
+					curr->requested_current = 0;
+					curr->requested_voltage = 0;
+					curr->batt.flags &=
+							~BATT_FLAG_WANT_CHARGE;
+					curr->state = ST_IDLE;
+				}
+			} else {
+				chargeCnt.val = 0;
+			}
+			break;
+
+		case SWELLING_TRIGGER_50:
+			curr->requested_current = 0;
+			curr->requested_voltage = 0;
+			curr->batt.flags &= ~BATT_FLAG_WANT_CHARGE;
+			curr->state = ST_IDLE;
+			chargeCnt.val = 0;
+			break;
+
+		case SWELLING_RECOVERY_10:
+			curr->requested_current = 5230 * 0.7 * 0.4;
+			chargeCnt.val = 0;
+			break;
+
+		case SWELLING_RECOVERY_20:
+		case SWELLING_RECOVERY_50:
+			curr->requested_current = 5230 * 0.7 * 0.9;
+			chargeCnt.val = 0;
+			break;
+
+		default:
+			curr->requested_voltage += 100;
+			break;
+		}
+	} else {
+		swelling_flag = 0;
+		chargeCnt.val = 0;
+	}
 
 	return 0;
 }
diff --git a/board/sasukette/board.h b/board/sasukette/board.h
index 6cc0d0009b..8c57fa9528 100644
--- a/board/sasukette/board.h
+++ b/board/sasukette/board.h
@@ -22,6 +22,7 @@
 
 /* Battery */
 #define CONFIG_BATTERY_FUEL_GAUGE
+#define CONFIG_BATTERY_CHECK_CHARGE_TEMP_LIMITS
 
 /* BC 1.2 */
 #define CONFIG_BC12_DETECT_PI3USB9201