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
|
/* Copyright 2018 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.h"
#include "battery_smart.h"
#include "console.h"
#include "extpower.h"
#include "gpio.h"
#include "hooks.h"
#include "timer.h"
#define CPRINTS(format, args...) cprints(CC_CHARGER, format, ## args)
/* Shutdown mode parameter to write to manufacturer access register */
#define SB_SHUTDOWN_DATA 0x0010
static enum battery_present batt_pres_prev = BP_NOT_SURE;
/* Battery may delay reporting battery present */
static int battery_report_present = 1;
static const struct battery_info info = {
.voltage_max = 13200, /* mV */
.voltage_normal = 11550,
.voltage_min = 9000,
.precharge_current = 256, /* mA */
.start_charging_min_c = 0,
.start_charging_max_c = 50,
.charging_min_c = 0,
.charging_max_c = 60,
.discharging_min_c = -20,
.discharging_max_c = 75,
};
const struct battery_info *battery_get_info(void)
{
return &info;
}
int board_cut_off_battery(void)
{
int rv;
/* Ship mode command must be sent twice to take effect */
rv = sb_write(SB_MANUFACTURER_ACCESS, SB_SHUTDOWN_DATA);
if (rv != EC_SUCCESS)
return rv;
return sb_write(SB_MANUFACTURER_ACCESS, SB_SHUTDOWN_DATA);
}
enum battery_present battery_hw_present(void)
{
/* The GPIO is low when the battery is physically present */
return gpio_get_level(GPIO_EC_BATT_PRES_ODL) ? BP_NO : BP_YES;
}
static int battery_init(void)
{
int batt_status;
return battery_status(&batt_status) ? 0 :
!!(batt_status & STATUS_INITIALIZED);
}
/* Allow booting now that the battery has woke up */
static void battery_now_present(void)
{
CPRINTS("battery will now report present");
battery_report_present = 1;
}
DECLARE_DEFERRED(battery_now_present);
static int battery_check_disconnect(void)
{
/* TODO(ecgh): Read the status of charge/discharge FETs */
return BATTERY_NOT_DISCONNECTED;
}
enum battery_present battery_is_present(void)
{
enum battery_present batt_pres;
static int battery_report_present_timer_started;
/* Get the physical hardware status */
batt_pres = battery_hw_present();
/*
* Make sure battery status is implemented, I2C transactions are
* success & the battery status is Initialized to find out if it
* is a working battery and it is not in the cut-off mode.
*/
if (batt_pres == BP_YES && batt_pres_prev != batt_pres &&
(battery_is_cut_off() != BATTERY_CUTOFF_STATE_NORMAL ||
battery_check_disconnect() != BATTERY_NOT_DISCONNECTED ||
battery_init() == 0)) {
battery_report_present = 0;
/*
* When this path is taken, the _timer_started flag must be
* reset so the 'else if' path will be entered and the
* battery_report_present flag can be set by the deferred
* call. This handles the case of the battery being disconected
* and reconnected while running or if battery_init() returns an
* error due to a failed sb_read.
*/
battery_report_present_timer_started = 0;
} else if (batt_pres == BP_YES && batt_pres_prev == BP_NO &&
!battery_report_present_timer_started) {
/*
* Wait 1/2 second before reporting present if it was
* previously reported as not present
*/
battery_report_present_timer_started = 1;
battery_report_present = 0;
hook_call_deferred(&battery_now_present_data, 500 * MSEC);
}
if (!battery_report_present)
batt_pres = BP_NO;
batt_pres_prev = batt_pres;
return batt_pres;
}
|
