73 lines
1.7 KiB
C
73 lines
1.7 KiB
C
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/* Copyright 2015 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*
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* Battery pack vendor provided charging profile
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*/
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#include "battery.h"
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#include "battery_smart.h"
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#include "i2c.h"
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#include "util.h"
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/* Shutdown mode parameter to write to manufacturer access register */
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#define PARAM_CUT_OFF_LOW 0x10
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#define PARAM_CUT_OFF_HIGH 0x00
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static const struct battery_info info = {
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#if (BOARD_REV >= OAK_REV3)
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.voltage_max = 13050,
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.voltage_normal = 11400,
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/*
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* TODO(crosbug.com/p/44428):
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* In order to compatible with 2S battery, set min voltage as 6V rather
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* than 9V. Should set voltage_min to 9V, when 2S battery
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* phased out.
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*/
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.voltage_min = 6000,
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#else /* BOARD_REV < OAK_REV3 */
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.voltage_max = 8700,
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.voltage_normal = 7600,
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.voltage_min = 6000,
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#endif
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/* Pre-charge values. */
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.precharge_current = 256, /* mA */
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.start_charging_min_c = 0,
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.start_charging_max_c = 45,
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.charging_min_c = 0,
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.charging_max_c = 45,
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.discharging_min_c = 0,
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.discharging_max_c = 60,
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};
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const struct battery_info *battery_get_info(void)
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{
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return &info;
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}
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static int cutoff(void)
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{
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int rv;
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uint8_t buf[3];
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/* Ship mode command must be sent twice to take effect */
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buf[0] = SB_MANUFACTURER_ACCESS & 0xff;
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buf[1] = PARAM_CUT_OFF_LOW;
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buf[2] = PARAM_CUT_OFF_HIGH;
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i2c_lock(I2C_PORT_BATTERY, 1);
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rv = i2c_xfer_unlocked(I2C_PORT_BATTERY, BATTERY_ADDR_FLAGS,
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buf, 3, NULL, 0, I2C_XFER_SINGLE);
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rv |= i2c_xfer_unlocked(I2C_PORT_BATTERY, BATTERY_ADDR_FLAGS,
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buf, 3, NULL, 0, I2C_XFER_SINGLE);
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i2c_lock(I2C_PORT_BATTERY, 0);
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return rv;
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}
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int board_cut_off_battery(void)
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{
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return cutoff();
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}
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