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-rw-r--r-- | firmware/target/arm/s5l8700/meizu-m3/powermgmt-m3.c | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/firmware/target/arm/s5l8700/meizu-m3/powermgmt-m3.c b/firmware/target/arm/s5l8700/meizu-m3/powermgmt-m3.c new file mode 100644 index 0000000000..3960dab2c1 --- /dev/null +++ b/firmware/target/arm/s5l8700/meizu-m3/powermgmt-m3.c | |||
@@ -0,0 +1,67 @@ | |||
1 | /*************************************************************************** | ||
2 | * __________ __ ___. | ||
3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * $Id$ | ||
9 | * | ||
10 | * Copyright © 2009 Bertrik Sikken | ||
11 | * | ||
12 | * This program is free software; you can redistribute it and/or | ||
13 | * modify it under the terms of the GNU General Public License | ||
14 | * as published by the Free Software Foundation; either version 2 | ||
15 | * of the License, or (at your option) any later version. | ||
16 | * | ||
17 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY | ||
18 | * KIND, either express or implied. | ||
19 | * | ||
20 | ****************************************************************************/ | ||
21 | |||
22 | #include "config.h" | ||
23 | #include "adc.h" | ||
24 | #include "adc-target.h" | ||
25 | #include "powermgmt.h" | ||
26 | |||
27 | /* Battery voltage calculation and discharge/charge curves for the Meizu M3. | ||
28 | |||
29 | Battery voltage is calculated under the assumption that the adc full-scale | ||
30 | readout represents 3.00V and that the battery ADC channel is fed with | ||
31 | exactly half of the battery voltage (through a resistive divider). | ||
32 | Discharge and charge curves have not been calibrated yet. | ||
33 | */ | ||
34 | |||
35 | const unsigned short battery_level_dangerous[BATTERY_TYPES_COUNT] = | ||
36 | { | ||
37 | /* TODO: this is just an initial guess */ | ||
38 | 3400 | ||
39 | }; | ||
40 | |||
41 | const unsigned short battery_level_shutoff[BATTERY_TYPES_COUNT] = | ||
42 | { | ||
43 | /* TODO: this is just an initial guess */ | ||
44 | 3300 | ||
45 | }; | ||
46 | |||
47 | /* voltages (millivolt) of 0%, 10%, ... 100% when charging disabled */ | ||
48 | const unsigned short percent_to_volt_discharge[BATTERY_TYPES_COUNT][11] = | ||
49 | { | ||
50 | /* TODO: simple uncalibrated curve, linear except for first 10% */ | ||
51 | { 3300, 3600, 3665, 3730, 3795, 3860, 3925, 3990, 4055, 4120, 4185 } | ||
52 | }; | ||
53 | |||
54 | /* voltages (millivolt) of 0%, 10%, ... 100% when charging enabled */ | ||
55 | const unsigned short percent_to_volt_charge[11] = | ||
56 | /* TODO: simple uncalibrated curve, linear except for first 10% */ | ||
57 | { 3300, 3600, 3665, 3730, 3795, 3860, 3925, 3990, 4055, 4120, 4185 }; | ||
58 | |||
59 | /* full-scale ADC readout (2^10) in millivolt */ | ||
60 | #define BATTERY_SCALE_FACTOR 6000 | ||
61 | |||
62 | /* Returns battery voltage from ADC [millivolts] */ | ||
63 | unsigned int battery_adc_voltage(void) | ||
64 | { | ||
65 | return (adc_read(ADC_BATTERY) * BATTERY_SCALE_FACTOR) >> 10; | ||
66 | } | ||
67 | |||