summaryrefslogtreecommitdiffstats
path: root/firmware/target/mips/ingenic_x1000/shanlingq1/power-shanlingq1.c
blob: 86ee84c37abf6a4dc4bdcf60db026a8e69471488 (plain)
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
/***************************************************************************
 *             __________               __   ___.
 *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
 *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
 *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
 *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
 *                     \/            \/     \/    \/            \/
 * $Id$
 *
 * Copyright (C) 2021 Aidan MacDonald
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
 * KIND, either express or implied.
 *
 ****************************************************************************/

#include "power.h"
#include "adc.h"
#include "system.h"
#include "axp192.h"
#ifdef HAVE_CW2015
# include "cw2015.h"
#endif
#ifdef HAVE_USB_CHARGING_ENABLE
# include "usb_core.h"
#endif

#include "i2c-x1000.h"

/* TODO: Better(?) battery reporting for Q1 using CW2015 driver
 *
 * The CW2015 has its own quirks so the driver has to be more complicated
 * than "read stuff from I2C," unfortunately. Without fixing the quirks it
 * is probably worse than the simple voltage-based method.
 *
 * A bigger problem is that it shares an I2C bus with the AXP192, but when
 * we attempt to communicate with both chips, they start returning bogus
 * data intermittently. Ususally, reads will return 0 but sometimes they
 * can return other nonzero bogus data. It could be that one or the other is
 * pulling the bus line down inappropriately, or maybe the hardware does not
 * respect the bus free time between start/stop conditions and one of the
 * devices is getting confused.
 */

const unsigned short battery_level_dangerous[BATTERY_TYPES_COUNT] =
{
    3470
};

/* the OF shuts down at this voltage */
const unsigned short battery_level_shutoff[BATTERY_TYPES_COUNT] =
{
    3400
};

/* voltages (millivolt) of 0%, 10%, ... 100% when charging disabled */
const unsigned short percent_to_volt_discharge[BATTERY_TYPES_COUNT][11] =
{
    { 3400, 3639, 3697, 3723, 3757, 3786, 3836, 3906, 3980, 4050, 4159 }
};

/* voltages (millivolt) of 0%, 10%, ... 100% when charging enabled */
const unsigned short percent_to_volt_charge[11] =
{
      3485, 3780, 3836, 3857, 3890, 3930, 3986, 4062, 4158, 4185, 4196
};

void power_init(void)
{
    i2c_x1000_set_freq(AXP_PMU_BUS, I2C_FREQ_400K);
#ifdef HAVE_CW2015
    cw2015_init();
#endif

    /* Set DCDC2 to 1.2 V to match OF settings. */
    axp_set_supply_voltage(AXP_SUPPLY_DCDC2, 1200);

    /* Power on required supplies */
    axp_set_enabled_supplies(
        (1 << AXP_SUPPLY_DCDC1) | /* SD bus (3.3 V) */
        (1 << AXP_SUPPLY_DCDC2) | /* LCD (1.2 V) */
        (1 << AXP_SUPPLY_DCDC3) | /* CPU (1.8 V) */
        (1 << AXP_SUPPLY_LDO2) |  /* Touchscreen (3.3 V) */
        (1 << AXP_SUPPLY_LDO3));  /* USB analog (2.5 V) */

    /* Enable required ADCs */
    axp_set_enabled_adcs(
        (1 << AXP_ADC_BATTERY_VOLTAGE) |
        (1 << AXP_ADC_CHARGE_CURRENT) |
        (1 << AXP_ADC_DISCHARGE_CURRENT) |
        (1 << AXP_ADC_VBUS_VOLTAGE) |
        (1 << AXP_ADC_VBUS_CURRENT) |
        (1 << AXP_ADC_INTERNAL_TEMP) |
        (1 << AXP_ADC_APS_VOLTAGE));

    /* Configure USB charging */
    axp_set_vhold_level(4400);
    usb_charging_maxcurrent_change(100);

    /* Delay to give power output time to stabilize */
    mdelay(20);
}

#ifdef HAVE_USB_CHARGING_ENABLE
void usb_charging_maxcurrent_change(int maxcurrent)
{
    int vbus_limit;
    int charge_current;

    /* Note that the charge current setting is a maximum: it will be
     * reduced dynamically by the AXP192 so the combined load is less
     * than the set VBUS current limit. */
    if(maxcurrent <= 100) {
        vbus_limit = AXP_VBUS_LIMIT_500mA;
        charge_current = 100;
    } else {
        vbus_limit = AXP_VBUS_LIMIT_500mA;
        charge_current = 550;
    }

    axp_set_vbus_limit(vbus_limit);
    axp_set_charge_current(charge_current);
}
#endif

void power_off(void)
{
    axp_power_off();
    while(1);
}

bool charging_state(void)
{
    return axp_is_charging();
}

unsigned int power_input_status(void)
{
    return axp_power_input_status();
}

int _battery_voltage(void)
{
    /* CW2015 can also read battery voltage, but the AXP consistently
     * reads ~20-30 mV higher so I suspect it's the "real" voltage. */
    return axp_read_adc(AXP_ADC_BATTERY_VOLTAGE);
}

#if CONFIG_BATTERY_MEASURE & CURRENT_MEASURE
int _battery_current(void)
{
    if(charging_state())
        return axp_read_adc(AXP_ADC_CHARGE_CURRENT);
    else
        return axp_read_adc(AXP_ADC_DISCHARGE_CURRENT);
}
#endif

#if defined(HAVE_CW2015) && (CONFIG_BATTERY_MEASURE & PERCENTAGE_MEASURE) != 0
int _battery_level(void)
{
    return cw2015_get_soc();
}
#endif

#if defined(HAVE_CW2015) && (CONFIG_BATTERY_MEASURE & TIME_MEASURE) != 0
int _battery_time(void)
{
    return cw2015_get_rrt();
}
#endif

void adc_init(void)
{
}