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
|
/* 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 "charge_state.h"
#include "console.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.
*/
#define MAX_INPUT_CURRENT 3200
#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;
}
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 */
|
