1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
|
/* Copyright (c) 2012 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_smart.h"
#include "charge_state.h"
#include "console.h"
#include "ec_commands.h"
#include "extpower.h"
#include "util.h"
static const struct battery_info info = {
/*
* Design voltage
* max = 8.4V
* normal = 7.4V
* min = 6.0V
*/
.voltage_max = 8400,
.voltage_normal = 7400,
.voltage_min = 6000,
/* Pre-charge current: I <= 0.01C */
.precharge_current = 64, /* mA */
/*
* Operational temperature range
* 0 <= T_charge <= 50 deg C
* -20 <= T_discharge <= 60 deg C
*/
.start_charging_min_c = 0,
.start_charging_max_c = 50,
.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;
}
#ifdef CONFIG_CHARGER_PROFILE_OVERRIDE
/*
* For Samus, we'd like to set the CONFIG_CHARGER_INPUT_CURRENT to a higher
* value, but the AC adapters freak out if we do. So instead we set it to a
* low value, and it gets reset to that point every time AC is applied. Then we
* bump it up a little bit every time through the loop until it's where we
* wanted it in the first place.
*/
/* FIXME(crosbug.com/p/24461): determine correct values for this */
#define MAX_INPUT_CURRENT 2048
#define INPUT_CURRENT_INCR 64
static int fast_charging_allowed;
/*
* This can override the smart battery's charging profile. To make a change,
* modify one or more of requested_voltage, requested_current, or state.
* Leave everything else unchanged.
*
* Return the next poll period in usec, or zero to use the default (which is
* state dependent).
*/
int charger_profile_override(struct charge_state_data *curr)
{
int rv;
/* We only want to override how we charge, nothing else. */
if (curr->state != ST_CHARGE)
return 0;
/* Bump the input current up a little at a time if needed. */
if (curr->chg.input_current < MAX_INPUT_CURRENT) {
rv = charger_set_input_current(curr->chg.input_current +
INPUT_CURRENT_INCR);
/*
* If we can't set the input current, indicate the error
* (negative, since positive changes the poll period) and
* don't override the default behavior.
*/
if (rv)
return -rv;
}
/* Do we want to mess with the charge profile too? */
if (!fast_charging_allowed)
return 0;
/* Okay, impose our custom will */
curr->requested_current = 9000;
curr->requested_voltage = 8300;
if (curr->batt.current <= 6300) {
curr->requested_current = 6300;
curr->requested_voltage = 8400;
} else if (curr->batt.current <= 4500) {
curr->requested_current = 4500;
curr->requested_voltage = 8500;
} else if (curr->batt.current <= 2700) {
curr->requested_current = 2700;
curr->requested_voltage = 8700;
} else if (curr->batt.current <= 475) {
/*
* Should we stop? If so, how do we start again?
* For now, just use the battery's profile.
*/
curr->requested_current = curr->batt.desired_current;
curr->requested_voltage = curr->batt.desired_voltage;
}
return 0;
}
/* Customs options controllable by host command. */
#define PARAM_FASTCHARGE (CS_PARAM_CUSTOM_PROFILE_MIN + 0)
enum ec_status charger_profile_override_get_param(uint32_t param,
uint32_t *value)
{
if (param == PARAM_FASTCHARGE) {
*value = fast_charging_allowed;
return EC_RES_SUCCESS;
}
return EC_RES_INVALID_PARAM;
}
enum ec_status charger_profile_override_set_param(uint32_t param,
uint32_t value)
{
if (param == PARAM_FASTCHARGE) {
fast_charging_allowed = value;
return EC_RES_SUCCESS;
}
return EC_RES_INVALID_PARAM;
}
static int command_fastcharge(int argc, char **argv)
{
if (argc > 1 && !parse_bool(argv[1], &fast_charging_allowed))
return EC_ERROR_PARAM1;
ccprintf("fastcharge %s\n", fast_charging_allowed ? "on" : "off");
return EC_SUCCESS;
}
DECLARE_CONSOLE_COMMAND(fastcharge, command_fastcharge,
"[on|off]",
"Get or set fast charging profile",
NULL);
#endif /* CONFIG_CHARGER_PROFILE_OVERRIDE */
#ifdef CONFIG_BATTERY_REVIVE_DISCONNECT
/*
* Check if battery is in disconnect state, a state entered by pulling
* BATT_DISCONN_N low, and clear that state if we have external power plugged
* and no battery faults are detected. Disconnect state resembles battery
* shutdown mode, but extra steps must be taken to get the battery out of this
* mode.
*/
enum battery_disconnect_state battery_get_disconnect_state(void)
{
uint8_t data[6];
int rv;
/*
* Take note if we find that the battery isn't in disconnect state,
* and always return NOT_DISCONNECTED without probing the battery.
* This assumes the battery will not go to disconnect state during
* runtime.
*/
static int not_disconnected;
if (not_disconnected)
return BATTERY_NOT_DISCONNECTED;
if (extpower_is_present()) {
/* Check if battery charging + discharging is disabled. */
rv = sb_write(SB_MANUFACTURER_ACCESS, PARAM_OPERATION_STATUS);
if (rv)
return BATTERY_DISCONNECT_ERROR;
rv = sb_read_string(I2C_PORT_BATTERY, BATTERY_ADDR,
SB_ALT_MANUFACTURER_ACCESS, data, 6);
if (rv || !(data[3] & BATTERY_DISCHARGING_DISABLED) ||
!(data[3] & BATTERY_CHARGING_DISABLED)) {
not_disconnected = 1;
return BATTERY_NOT_DISCONNECTED;
}
/*
* Battery is neither charging nor discharging. Verify that
* we didn't enter this state due to a safety fault.
*/
rv = sb_write(SB_MANUFACTURER_ACCESS, PARAM_SAFETY_STATUS);
if (rv)
return BATTERY_DISCONNECT_ERROR;
rv = sb_read_string(I2C_PORT_BATTERY, BATTERY_ADDR,
SB_ALT_MANUFACTURER_ACCESS, data, 6);
if (rv || data[2] || data[3] || data[4] || data[5])
return BATTERY_DISCONNECT_ERROR;
else
/* No safety fault -- clear disconnect state. */
return BATTERY_DISCONNECTED;
}
not_disconnected = 1;
return BATTERY_NOT_DISCONNECTED;
}
#endif /* CONFIG_BATTERY_REVIVE_DISCONNECT */
|
