ryu: Implement battery cut-off

The battery cut-off is achieved by putting BQ27742 in SHUTDOWN mode.

BRANCH=None
BUG=None
TEST=Unplug AC and do 'cutoff' in EC console. The EC console goes
unresponsive.

Change-Id: I4a1aa359d79333d47aaf53b685a52960e5dfd652
Signed-off-by: Vic Yang <victoryang@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/225007
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>

8 files changed, 80 insertions, 46 deletions

diff --git a/board/ryu/battery.c b/board/ryu/battery.c
new file mode 100644
index 0000000000..dc65128719
--- /dev/null
+++ b/board/ryu/battery.c
@@ -0,0 +1,38 @@
+/* Copyright 2014 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 "common.h"
+#include "i2c.h"
+
+/* Battery temperature ranges in degrees C */
+static const struct battery_info info = {
+	/* Design voltage */
+	.voltage_max    = 4350,
+	.voltage_normal = 3800,
+	.voltage_min    = 2800,
+	/* Pre-charge current: I <= 0.01C */
+	.precharge_current  = 64,  /* mA */
+	/* Operational temperature range */
+	.start_charging_min_c = 0,
+	.start_charging_max_c = 45,
+	.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)
+{
+	/* Write SET_SHUTDOWN(0x13) to CTRL(0x00) */
+	return i2c_write16(I2C_PORT_BATTERY, 0xaa, 0x0, 0x13);
+}
diff --git a/board/ryu/board.c b/board/ryu/board.c
index e8f770a7ed..eb336131a0 100644
--- a/board/ryu/board.c
+++ b/board/ryu/board.c
@@ -176,25 +176,3 @@ int extpower_is_present(void)
 {
 	return gpio_get_level(GPIO_CHGR_ACOK);
 }
-
-/* Battery temperature ranges in degrees C */
-static const struct battery_info info = {
-	/* Design voltage */
-	.voltage_max    = 4350,
-	.voltage_normal = 3800,
-	.voltage_min    = 2800,
-	/* Pre-charge current: I <= 0.01C */
-	.precharge_current  = 64,  /* mA */
-	/* Operational temperature range */
-	.start_charging_min_c = 0,
-	.start_charging_max_c = 45,
-	.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;
-}
diff --git a/board/ryu/board.h b/board/ryu/board.h
index 0ce0d59816..4530db90cf 100644
--- a/board/ryu/board.h
+++ b/board/ryu/board.h
@@ -53,6 +53,7 @@
 /* Charging/Power configuration */
 #undef CONFIG_BATTERY_RYU /* TODO implement */
 #define CONFIG_BATTERY_BQ27541
+#define CONFIG_BATTERY_CUT_OFF
 #define CONFIG_BATTERY_REQUESTS_NIL_WHEN_DEAD
 #define CONFIG_BATTERY_REVIVE_DISCONNECT
 #define CONFIG_CHARGER
diff --git a/board/ryu/build.mk b/board/ryu/build.mk
index 83acdab147..150b265120 100644
--- a/board/ryu/build.mk
+++ b/board/ryu/build.mk
@@ -9,5 +9,5 @@ CHIP:=stm32
 CHIP_FAMILY:=stm32f0
 CHIP_VARIANT:=stm32f07x
 
-board-y=board.o
+board-y=board.o battery.o
 board-$(CONFIG_USB_POWER_DELIVERY)+=usb_pd_policy.o
diff --git a/board/ryu_p2/battery.c b/board/ryu_p2/battery.c
new file mode 100644
index 0000000000..dc65128719
--- /dev/null
+++ b/board/ryu_p2/battery.c
@@ -0,0 +1,38 @@
+/* Copyright 2014 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 "common.h"
+#include "i2c.h"
+
+/* Battery temperature ranges in degrees C */
+static const struct battery_info info = {
+	/* Design voltage */
+	.voltage_max    = 4350,
+	.voltage_normal = 3800,
+	.voltage_min    = 2800,
+	/* Pre-charge current: I <= 0.01C */
+	.precharge_current  = 64,  /* mA */
+	/* Operational temperature range */
+	.start_charging_min_c = 0,
+	.start_charging_max_c = 45,
+	.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)
+{
+	/* Write SET_SHUTDOWN(0x13) to CTRL(0x00) */
+	return i2c_write16(I2C_PORT_BATTERY, 0xaa, 0x0, 0x13);
+}
diff --git a/board/ryu_p2/board.c b/board/ryu_p2/board.c
index 84874695c4..af660017fb 100644
--- a/board/ryu_p2/board.c
+++ b/board/ryu_p2/board.c
@@ -151,25 +151,3 @@ int extpower_is_present(void)
 {
 	return gpio_get_level(GPIO_CHGR_ACOK);
 }
-
-/* Battery temperature ranges in degrees C */
-static const struct battery_info info = {
-	/* Design voltage */
-	.voltage_max    = 4350,
-	.voltage_normal = 3800,
-	.voltage_min    = 2800,
-	/* Pre-charge current: I <= 0.01C */
-	.precharge_current  = 64,  /* mA */
-	/* Operational temperature range */
-	.start_charging_min_c = 0,
-	.start_charging_max_c = 45,
-	.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;
-}
diff --git a/board/ryu_p2/board.h b/board/ryu_p2/board.h
index d4360ee4cd..928e768398 100644
--- a/board/ryu_p2/board.h
+++ b/board/ryu_p2/board.h
@@ -49,6 +49,7 @@
 /* Charging/Power configuration */
 #undef CONFIG_BATTERY_RYU /* TODO implement */
 #define CONFIG_BATTERY_BQ27541
+#define CONFIG_BATTERY_CUT_OFF
 #define CONFIG_BATTERY_REQUESTS_NIL_WHEN_DEAD
 #define CONFIG_BATTERY_REVIVE_DISCONNECT
 #define CONFIG_CHARGER
diff --git a/board/ryu_p2/build.mk b/board/ryu_p2/build.mk
index 4671ea0c7c..d498972118 100644
--- a/board/ryu_p2/build.mk
+++ b/board/ryu_p2/build.mk
@@ -9,5 +9,5 @@ CHIP:=stm32
 CHIP_FAMILY:=stm32f3
 CHIP_VARIANT:=stm32f373
 
-board-y=board.o
+board-y=board.o battery.o
 board-$(CONFIG_USB_POWER_DELIVERY)+=usb_pd_policy.o