1 files changed, 131 insertions, 0 deletions
diff --git a/driver/battery/link.c b/driver/battery/link.c
new file mode 100644
index 0000000000..a7877529a8
--- /dev/null
+++ b/driver/battery/link.c
@@ -0,0 +1,131 @@
+/* Copyright (c) 2012 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"
+
+/*
+ * Design capacity
+ *   Battery capacity = 8200 mAh
+ *   1C = 8200 mA
+ */
+#define DESIGN_CAPACITY 8200
+
+enum {
+	TEMP_RANGE_10,
+	TEMP_RANGE_23,
+	TEMP_RANGE_35,
+	TEMP_RANGE_45,
+	TEMP_RANGE_50,
+	TEMP_RANGE_MAX
+};
+
+enum {
+	VOLT_RANGE_7200,
+	VOLT_RANGE_8000,
+	VOLT_RANGE_8400,
+	VOLT_RANGE_MAX
+};
+
+/*
+ * Vendor provided charging method
+ *      temp  : < 7.2V, 7.2V ~ 8.0V, 8.0V ~ 8.4V
+ *  -  0 ~ 10 :  0.8A       1.6A         0.8A
+ *  - 10 ~ 23 :  1.6A       4.0A         1.6A
+ *  - 23 ~ 35 :  4.0A       4.0A         4.0A
+ *  - 35 ~ 45 :  1.6A       4.0A         1.6A
+ *  - 45 ~ 50 :  0.8A       1.6A         0.8A
+ */
+static const int const current_limit[TEMP_RANGE_MAX][VOLT_RANGE_MAX] = {
+	{ 800, 1600,  800},
+	{1600, 4000, 1600},
+	{4000, 4000, 4000},
+	{1600, 4000, 1600},
+	{ 800, 1600,  800},
+};
+
+const struct battery_temperature_ranges bat_temp_ranges = {
+	/*
+	 * Operational temperature range
+	 *   0 <= T_charge    <= 50 deg C
+	 * -20 <= T_discharge <= 60 deg C
+	 */
+	.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,
+};
+
+static const struct battery_info info = {
+	/*
+	 * Design voltage
+	 *   max    = 8.4V
+	 *   normal = 7.4V
+	 *   min    = 6.0V
+	 */
+	.voltage_max    = 8400,
+	.voltage_normal = 7400,
+	.voltage_min    = 6000,
+
+	/* Pre-charge current: I <= 0.01C */
+	.precharge_current  = 64, /* mA */
+};
+
+static inline void limit_value(int *val, int limit)
+{
+	if (*val > limit)
+		*val = limit;
+}
+
+const struct battery_info *battery_get_info(void)
+{
+	return &info;
+}
+
+void battery_vendor_params(struct batt_params *batt)
+{
+	int *desired_current = &batt->desired_current;
+	int temp_range, volt_range;
+	int bat_temp_c = DECI_KELVIN_TO_CELSIUS(batt->temperature);
+
+	/* Limit charging voltage */
+	if (batt->desired_voltage > info.voltage_max)
+		batt->desired_voltage = info.voltage_max;
+
+	/* Don't charge if outside of allowable temperature range */
+	if (bat_temp_c >= bat_temp_ranges.charging_max_c ||
+	    bat_temp_c < bat_temp_ranges.charging_min_c) {
+		batt->desired_voltage = 0;
+		batt->desired_current = 0;
+		return;
+	}
+
+	if (bat_temp_c <= 10)
+		temp_range = TEMP_RANGE_10;
+	else if (bat_temp_c <= 23)
+		temp_range = TEMP_RANGE_23;
+	else if (bat_temp_c <= 35)
+		temp_range = TEMP_RANGE_35;
+	else if (bat_temp_c <= 45)
+		temp_range = TEMP_RANGE_45;
+	else
+		temp_range = TEMP_RANGE_50;
+
+	if (batt->voltage < 7200)
+		volt_range = VOLT_RANGE_7200;
+	else if (batt->voltage < 8000)
+		volt_range = VOLT_RANGE_8000;
+	else
+		volt_range = VOLT_RANGE_8400;
+
+	limit_value(desired_current, current_limit[temp_range][volt_range]);
+
+	/* If battery wants current, give it at least the precharge current */
+	if (*desired_current > 0 && *desired_current < info.precharge_current)
+		*desired_current = info.precharge_current;
+}