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4912f214aa
In some cases, the virtual battery code creates transactions that violate SB spec. One example: If the host command is structured as two messages - a write to 0x03 (reg addr), followed by two bytes of write data, the first byte of the second message (write data) will be sent to virtual_battery_read(), as if it were a reg read request. Let's do the following change for virtual battery: 1. Parse the command more carefully with state machines. 2. Support write caching for some critical registers. 3. Cache more attributes (0x03 and 0x0f). BUG=chrome-os-partner:59239, chromium:659819 BRANCH=none TEST='power_supply_info' works on kevin Change-Id: Icdeb12b21f0dc3c329f29b206b7b9395ca4c9998 Reviewed-on: https://chromium-review.googlesource.com/407987 Commit-Ready: Philip Chen <philipchen@chromium.org> Tested-by: Philip Chen <philipchen@chromium.org> Reviewed-by: Shawn N <shawnn@chromium.org>
78 lines
2.1 KiB
C
78 lines
2.1 KiB
C
/* Copyright (c) 2014 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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#include "battery.h"
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#include "battery_smart.h"
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#include "charger.h"
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#include "timer.h"
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#ifndef __CROS_EC_CHARGE_STATE_V2_H
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#define __CROS_EC_CHARGE_STATE_V2_H
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#if defined(CONFIG_I2C_VIRTUAL_BATTERY) && defined(CONFIG_BATTERY_SMART)
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#define VIRTUAL_BATTERY_ADDR BATTERY_ADDR
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#endif
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/*
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* The values exported by charge_get_state() and charge_get_flags() are used
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* only to control the LEDs (with one not-quite-correct exception). For V2
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* we use a different set of states internally.
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*/
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enum charge_state_v2 {
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ST_IDLE = 0,
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ST_DISCHARGE,
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ST_CHARGE,
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ST_PRECHARGE,
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NUM_STATES_V2
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};
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struct charge_state_data {
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timestamp_t ts;
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int ac;
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int batt_is_charging;
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struct charger_params chg;
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struct batt_params batt;
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enum charge_state_v2 state;
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int requested_voltage;
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int requested_current;
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int desired_input_current;
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};
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/*
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* Optional customization.
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*
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* On input, the struct reflects the default behavior. The function can make
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* changes to the state, requested_voltage, or requested_current.
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*
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* Return value:
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* >0 Desired time in usec for this poll period.
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* 0 Use the default poll period (which varies with the state).
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* <0 An error occurred. The poll time will be shorter than usual. Too
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* many errors in a row may trigger some corrective action.
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*/
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int charger_profile_override(struct charge_state_data *);
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/*
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* Access to custom profile params through host commands.
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* What this does is up to the implementation.
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*/
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enum ec_status charger_profile_override_get_param(uint32_t param,
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uint32_t *value);
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enum ec_status charger_profile_override_set_param(uint32_t param,
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uint32_t value);
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/**
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* Set the charge input current limit. This value is stored and sent every
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* time AC is applied.
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*
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* @param ma New input current limit in mA
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* @param mv Negotiated charge voltage in mV.
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* @return EC_SUCCESS or error
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*/
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int charge_set_input_current_limit(int ma, int mv);
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#endif /* __CROS_EC_CHARGE_STATE_V2_H */
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