Big: Correct the charger IC driver

Add bq24735 driver and move to here for further developing

BRANCH=big
BUG=None
TEST=test basic charing/discharging function

Reviewed-on: https://chromium-review.googlesource.com/196541
Reviewed-by: Yung-chieh Lo <yjlou@chromium.org>
Tested-by: Lin Cloud <cloud_lin@compal.com>
Commit-Queue: Lin Cloud <cloud_lin@compal.com>

(cherry picked from commit 295e409ea9ab10adb34b13330a2b9948e43da58c)

Change-Id: I6dee1d05fbd9b54c2dbb10ebd42607d197107633
Original-Change-Id: I2af8dabda34ebc9d6fbdbd6c781258973b4b565a
Signed-off-by: Louis Yung-Chieh Lo <yjlou@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/197006

4 files changed, 242 insertions, 1 deletions

diff --git a/board/big/board.h b/board/big/board.h
index 6c39da3d58..50376724d5 100644
--- a/board/big/board.h
+++ b/board/big/board.h
@@ -14,7 +14,7 @@
 #define CONFIG_BATTERY_CUT_OFF
 #define CONFIG_CHARGER
 #define CONFIG_CHARGER_V2
-#define CONFIG_CHARGER_BQ24725
+#define CONFIG_CHARGER_BQ24735
 #define CONFIG_CHIPSET_TEGRA
 #define CONFIG_POWER_COMMON
 #define CONFIG_EXTPOWER_GPIO
diff --git a/driver/build.mk b/driver/build.mk
index b8e3c92929..ff6bdf6933 100644
--- a/driver/build.mk
+++ b/driver/build.mk
@@ -24,6 +24,7 @@ driver-$(CONFIG_CHARGER_BQ24192)+=charger/bq24192.o
 driver-$(CONFIG_CHARGER_BQ24707A)+=charger/bq24707a.o
 driver-$(CONFIG_CHARGER_BQ24715)+=charger/bq24715.o
 driver-$(CONFIG_CHARGER_BQ24725)+=charger/bq24725.o
+driver-$(CONFIG_CHARGER_BQ24735)+=charger/bq24735.o
 driver-$(CONFIG_CHARGER_BQ24738)+=charger/bq24738.o
 driver-$(CONFIG_CHARGER_BQ24773)+=charger/bq24773.o
 
diff --git a/driver/charger/bq24735.c b/driver/charger/bq24735.c
new file mode 100644
index 0000000000..829bbd41a4
--- /dev/null
+++ b/driver/charger/bq24735.c
@@ -0,0 +1,183 @@
+/* Copyright (c) 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.
+ *
+ * TI bq24735 battery charger driver.
+ */
+
+#include "battery_smart.h"
+#include "bq24735.h"
+#include "charger.h"
+#include "console.h"
+#include "common.h"
+#include "util.h"
+
+/* Sense resistor configurations and macros */
+#define DEFAULT_SENSE_RESISTOR 10
+#define R_SNS CONFIG_CHARGER_SENSE_RESISTOR
+#define R_AC  CONFIG_CHARGER_SENSE_RESISTOR_AC
+#define REG_TO_CURRENT(REG, RS) ((REG) * DEFAULT_SENSE_RESISTOR / (RS))
+#define CURRENT_TO_REG(CUR, RS) ((CUR) * (RS) / DEFAULT_SENSE_RESISTOR)
+
+/* Charger infomation
+ * charge voltage bitmask: 0111 1111 1111 0000
+ * charge current bitmask: 0001 1111 1000 0000
+ * input current bitmask : 0000 0000 1000 0000
+ */
+static const struct charger_info bq24735_charger_info = {
+	.name         = "bq24735",
+	.voltage_max  = 19200,
+	.voltage_min  = 1024,
+	.voltage_step = 16,
+	.current_max  = REG_TO_CURRENT(8128, R_SNS),
+	.current_min  = REG_TO_CURRENT(128, R_SNS),
+	.current_step = REG_TO_CURRENT(128, R_SNS),
+	.input_current_max  = REG_TO_CURRENT(8064, R_AC),
+	.input_current_min  = REG_TO_CURRENT(128, R_AC),
+	.input_current_step = REG_TO_CURRENT(128, R_AC),
+};
+
+/* bq24735 specific interfaces */
+
+int charger_set_input_current(int input_current)
+{
+	return sbc_write(BQ24735_INPUT_CURRENT,
+			 CURRENT_TO_REG(input_current, R_AC));
+}
+
+int charger_get_input_current(int *input_current)
+{
+	int rv;
+	int reg;
+
+	rv = sbc_read(BQ24735_INPUT_CURRENT, &reg);
+	if (rv)
+		return rv;
+
+	*input_current = REG_TO_CURRENT(reg, R_AC);
+
+	return EC_SUCCESS;
+}
+
+int charger_manufacturer_id(int *id)
+{
+	return sbc_read(BQ24735_MANUFACTURE_ID, id);
+}
+
+int charger_device_id(int *id)
+{
+	return sbc_read(BQ24735_DEVICE_ID, id);
+}
+
+int charger_get_option(int *option)
+{
+	return sbc_read(BQ24735_CHARGE_OPTION, option);
+}
+
+int charger_set_option(int option)
+{
+	return sbc_write(BQ24735_CHARGE_OPTION, option);
+}
+
+/* Charger interfaces */
+
+const struct charger_info *charger_get_info(void)
+{
+	return &bq24735_charger_info;
+}
+
+int charger_get_status(int *status)
+{
+	int rv;
+	int option;
+
+	rv = charger_get_option(&option);
+	if (rv)
+		return rv;
+
+	/* Default status */
+	*status = CHARGER_LEVEL_2;
+
+	if (option & OPTION_CHARGE_INHIBIT)
+		*status |= CHARGER_CHARGE_INHIBITED;
+
+	return EC_SUCCESS;
+}
+
+int charger_set_mode(int mode)
+{
+	int rv;
+	int option;
+
+	rv = charger_get_option(&option);
+	if (rv)
+		return rv;
+
+	if (mode & CHARGE_FLAG_INHIBIT_CHARGE)
+		option |= OPTION_CHARGE_INHIBIT;
+	else
+		option &= ~OPTION_CHARGE_INHIBIT;
+	return charger_set_option(option);
+}
+
+int charger_get_current(int *current)
+{
+	int rv;
+	int reg;
+
+	rv = sbc_read(SB_CHARGING_CURRENT, &reg);
+	if (rv)
+		return rv;
+
+	*current = REG_TO_CURRENT(reg, R_SNS);
+	return EC_SUCCESS;
+}
+
+int charger_set_current(int current)
+{
+	current = charger_closest_current(current);
+
+	return sbc_write(SB_CHARGING_CURRENT, CURRENT_TO_REG(current, R_SNS));
+}
+
+int charger_get_voltage(int *voltage)
+{
+	return sbc_read(SB_CHARGING_VOLTAGE, voltage);
+}
+
+int charger_set_voltage(int voltage)
+{
+	return sbc_write(SB_CHARGING_VOLTAGE, voltage);
+}
+
+/* Charging power state initialization */
+int charger_post_init(void)
+{
+	/*
+	 * Note: bq24735 power on reset state is:
+	 *	watch dog timer     = 175 sec
+	 *	input current limit = ~1/2 maximum setting
+	 *	charging voltage    = 0 mV
+	 *	charging current    = 0 mA
+	 */
+
+	/* Set charger input current limit */
+	return charger_set_input_current(CONFIG_CHARGER_INPUT_CURRENT);
+}
+
+int charger_discharge_on_ac(int enable)
+{
+	int rv;
+	int option;
+
+	rv = charger_get_option(&option);
+	if (rv)
+		return rv;
+
+	if (enable)
+		rv = charger_set_option(option | OPTION_LEARN_ENABLE);
+	else
+		rv = charger_set_option(option & ~OPTION_LEARN_ENABLE);
+
+	return rv;
+}
diff --git a/driver/charger/bq24735.h b/driver/charger/bq24735.h
new file mode 100644
index 0000000000..914ff2b903
--- /dev/null
+++ b/driver/charger/bq24735.h
@@ -0,0 +1,57 @@
+/* Copyright (c) 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.
+ *
+ * TI bq24735 battery charger driver.
+ */
+
+#ifndef __CROS_EC_CHARGER_BQ24735_H
+#define __CROS_EC_CHARGER_BQ24735_H
+
+/* Chip specific commands */
+#define BQ24735_CHARGE_OPTION           0x12
+#define BQ24735_INPUT_CURRENT           0x3f
+#define BQ24735_MANUFACTURE_ID          0xfe
+#define BQ24735_DEVICE_ID               0xff
+
+/* ChargeOption 0x12 */
+#define OPTION_CHARGE_INHIBIT           (1 << 0)
+#define OPTION_ACOC_THRESHOLD           (1 << 1)
+#define OPTION_BOOST_MODE_STATE         (1 << 2)
+#define OPTION_BOOST_MODE_ENABLE        (1 << 3)
+#define OPTION_ACDET_STATE              (1 << 4)
+#define OPTION_IOUT_SELECTION           (1 << 5)
+#define OPTION_LEARN_ENABLE             (1 << 6)
+#define OPTION_IFAULT_LOW_THRESHOLD     (1 << 7)
+#define OPTION_IFAULT_HI_ENABLE         (1 << 8)
+#define OPTION_EMI_FREQ_ENABLE          (1 << 9)
+#define OPTION_EMI_FREQ_ADJ             (1 << 10)
+#define OPTION_BAT_DEPLETION_THRESHOLD  (3 << 11)
+#define OPTION_WATCHDOG_TIMER           (3 << 13)
+#define OPTION_ACPRES_DEGLITCH_TIME     (1 << 15)
+
+/* OPTION_ACOC_THRESHOLD */
+#define ACOC_THRESHOLD_DISABLE          (0 << 1)
+#define ACOC_THRESHOLD_133X             (1 << 1)
+
+/* OPTION_IFAULT_LOW_THRESHOLD */
+#define IFAULT_LOW_135MV_DEFAULT        (0 << 7)
+#define IFAULT_LOW_230MV                (1 << 7)
+
+/* OPTION_BAT_DEPLETION_THRESHOLD */
+#define FALLING_THRESHOLD_5919          (0 << 11)
+#define FALLING_THRESHOLD_6265          (1 << 11)
+#define FALLING_THRESHOLD_6655          (2 << 11)
+#define FALLING_THRESHOLD_7097_DEFAULT  (3 << 11)
+
+/* OPTION_WATCHDOG_TIMER */
+#define CHARGE_WATCHDOG_DISABLE         (0 << 13)
+#define CHARGE_WATCHDOG_44SEC           (1 << 13)
+#define CHARGE_WATCHDOG_88SEC           (2 << 13)
+#define CHARGE_WATCHDOG_175SEC_DEFAULT  (3 << 13)
+
+/* OPTION_ACPRES_DEGLITCH_TIME */
+#define ACPRES_DEGLITCH_150MS           (0 << 15)
+#define ACPRES_DEGLITCH_1300MS_DEFAULT  (1 << 15)
+
+#endif /* __CROS_EC_CHARGER_BQ24735_H */