summaryrefslogtreecommitdiffstats
path: root/firmware/target/mips/ingenic_x1000/shanlingq1/power-shanlingq1.c
blob: 75f8031dd96248f01624db004b90c885018f40ca (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
/***************************************************************************
 *             __________               __   ___.
 *   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 "axp-pmu.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);
    axp_init();
#ifdef HAVE_CW2015
    cw2015_init();
#endif

    /* Change supply voltage from the default of 1250 mV to 1200 mV,
     * this matches the original firmware's settings. Didn't observe
     * any obviously bad behavior at 1250 mV, but better to be safe. */
    axp_supply_set_voltage(AXP_SUPPLY_DCDC2, 1200);

    /* For now, just turn everything on... definitely the touchscreen
     * is powered by one of the outputs */
    i2c_reg_modify1(AXP_PMU_BUS, AXP_PMU_ADDR,
                    AXP_REG_PWROUTPUTCTRL1, 0, 0x05, NULL);
    i2c_reg_modify1(AXP_PMU_BUS, AXP_PMU_ADDR,
                    AXP_REG_PWROUTPUTCTRL2, 0, 0x0f, NULL);
    i2c_reg_modify1(AXP_PMU_BUS, AXP_PMU_ADDR,
                    AXP_REG_DCDCWORKINGMODE, 0, 0xc0, NULL);

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

#ifdef HAVE_USB_CHARGING_ENABLE
void usb_charging_maxcurrent_change(int maxcurrent)
{
    axp_set_charge_current(maxcurrent);
}
#endif

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

bool charging_state(void)
{
    return axp_battery_status() == AXP_BATT_CHARGING;
}

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_adc_read(ADC_BATTERY_VOLTAGE);
}

#if CONFIG_BATTERY_MEASURE & CURRENT_MEASURE
int _battery_current(void)
{
    if(charging_state())
        return axp_adc_read(ADC_CHARGE_CURRENT);
    else
        return axp_adc_read(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)
{
}