eve: Add support for LISHEN battery

There are two batteries being evaludated for Eve and there needs to be
a batteery_info struct for each one for situations where the gas gauge
can't be read and the charge state machine uses these parameters.

BUG=chrome-os-partner:62711
BRANCH=none
TEST=Verifed that battery_type is read correctly for both LG and
LISHEN battery units.

On Lishen unit Drain battery completely, then reconnect type C
charger. Verified that battery is now charging. Prior to this CL, the
LISHEN bat would not charge because the internal overcurrent protection
mode would not tolerate the 256 mA precharge current that's specified
for the LG battery.

Tested that both Lishen and LG recovered after forcing a battery
disconnect.

Change-Id: I201eaf61ad03d3dc0d199ab441b07c371bceddde
Signed-off-by: Scott <scollyer@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/440514
Commit-Ready: Scott Collyer <scollyer@chromium.org>
Tested-by: Scott Collyer <scollyer@chromium.org>
Reviewed-by: Shawn N <shawnn@chromium.org>

1 files changed, 97 insertions, 4 deletions

diff --git a/board/eve/battery.c b/board/eve/battery.c
index 84d13244bc..fad21c2249 100644
--- a/board/eve/battery.c
+++ b/board/eve/battery.c
@@ -13,16 +13,41 @@
 #include "ec_commands.h"
 #include "extpower.h"
 #include "gpio.h"
+#include "hooks.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_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 info for proto */
-static const struct battery_info info = {
-	.voltage_max		= 8800,	/* mV */
+/*
+ * 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		= 8800, /* mV */
 	.voltage_normal		= 7700,
 	.voltage_min		= 6100, /* Add 100mV for charger accuracy */
 	.precharge_current	= 256,	/* mA */
@@ -34,9 +59,77 @@ static const struct battery_info info = {
 	.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		= 8750, /* mV */
+	.voltage_normal		= 7700,
+	.voltage_min		= 6100, /* Add 100mV for charger accuracy */
+	.precharge_current	= 88,	/* mA */
+	.start_charging_min_c	= 0,
+	.start_charging_max_c	= 46,
+	.charging_min_c		= 10,
+	.charging_max_c		= 50,
+	.discharging_min_c	= 10,
+	.discharging_max_c	= 50,
+};
+
+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,
+	},
+
+};
+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;
+	return info[board_battery_type == BATTERY_TYPE_COUNT ?
+		    DEFAULT_BATTERY_TYPE : board_battery_type].batt_info;
 }
 
 int board_cut_off_battery(void)