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-rw-r--r--firmware/target/arm/powermgmt-ascodec.c231
-rw-r--r--firmware/target/arm/sandisk/powermgmt-target.h59
-rw-r--r--firmware/target/arm/sandisk/sansa-c200/powermgmt-c200.c13
-rw-r--r--firmware/target/arm/sandisk/sansa-e200/powermgmt-e200.c11
4 files changed, 291 insertions, 23 deletions
diff --git a/firmware/target/arm/powermgmt-ascodec.c b/firmware/target/arm/powermgmt-ascodec.c
new file mode 100644
index 0000000000..ab9fd7b490
--- /dev/null
+++ b/firmware/target/arm/powermgmt-ascodec.c
@@ -0,0 +1,231 @@
1/***************************************************************************
2 * __________ __ ___.
3 * Open \______ \ ____ ____ | | _\_ |__ _______ ___
4 * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
5 * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
6 * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
7 * \/ \/ \/ \/ \/
8 * $Id$
9 *
10 * Copyright (C) 2009 by Michael Sevakis
11 * Copyright (C) 2008 by Bertrik Sikken
12 *
13 * This program is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU General Public License
15 * as published by the Free Software Foundation; either version 2
16 * of the License, or (at your option) any later version.
17 *
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
20 *
21 ****************************************************************************/
22#include "config.h"
23#include "system.h"
24#include "thread.h"
25#include "as3514.h"
26#include "ascodec.h"
27#include "adc.h"
28#include "powermgmt.h"
29#include "power.h"
30
31/*===========================================================================
32 * These parameters may be defined per target:
33 *
34 * BATT_FULL_VOLTAGE - Upon connect a charge cycle begins if the reading is
35 * lower than this value (millivolts).
36 *
37 * BATT_VAUTO_RECHARGE - While left plugged after cycle completion, the
38 * charger restarts automatically if the reading drops
39 * below this value (millivolts). Must be less than
40 * BATT_FULL_VOLTAGE.
41 *
42 * ADC_BATTERY - ADC channel from which to read the battery voltage
43 *
44 * BATT_CHG_V - Charger voltage regulation setting (as3514 regval)
45 *
46 * BATT_CHG_I - Charger current regulation setting (as3514 regval)
47 *
48 * CHARGER_TOTAL_TIMER - Maximum allowed charging time (1/2-second steps)
49 *===========================================================================
50 */
51
52/* This code assumes USB power input is not distinguishable from main
53 * power and charger connect cannot wait for USB configuration before
54 * considering USB charging available. Where they are distinguishable,
55 * things get more complicated. */
56static bool charger_close = false; /* Shutting down? */
57static int charger_total_timer = 0; /* Timeout in algorithm steps */
58
59/* Current battery threshold for (re)charge:
60 * First plugged = BATT_FULL_VOLTAGE
61 * After charge cycle or non-start = BATT_VAUTO_RECHARGE
62 */
63static unsigned int batt_threshold = 0;
64
65/* ADC should read 0x3ff=5.12V */
66/* full-scale ADC readout (2^10) in millivolt */
67
68/* Returns battery voltage from ADC [millivolts] */
69unsigned int battery_adc_voltage(void)
70{
71 return (adc_read(ADC_BATTERY) * 5125 + 512) >> 10;
72}
73
74/* Returns true if the unit is charging the batteries. */
75bool charging_state(void)
76{
77 return charge_state == CHARGING;
78}
79
80/* Reset the battery filter to a new voltage */
81static void battery_voltage_sync(void)
82{
83 int i;
84 unsigned int mv;
85
86 for (i = 0, mv = 0; i < 5; i++)
87 mv += battery_adc_voltage();
88
89 reset_battery_filter(mv / 5);
90}
91
92/* Disable charger and minimize all settings. Reset timers, etc. */
93static void disable_charger(void)
94{
95 ascodec_write(AS3514_IRQ_ENRD0, 0);
96 ascodec_write(AS3514_CHARGER,
97 TMPSUP_OFF | CHG_I_50MA | CHG_V_3_90V | CHG_OFF);
98
99 if (charge_state > DISCHARGING)
100 charge_state = DISCHARGING; /* Not an error state already */
101
102 charger_total_timer = 0;
103 battery_voltage_sync();
104}
105
106/* Enable charger with specified settings. Start timers, etc. */
107static void enable_charger(void)
108{
109 ascodec_write(AS3514_CHARGER, BATT_CHG_I | BATT_CHG_V);
110 /* Watch for end of charge. Temperature supervision is handled in
111 * hardware. Charger status can be read and has no interrupt enable. */
112 ascodec_write(AS3514_IRQ_ENRD0, CHG_ENDOFCH);
113
114 sleep(HZ/10); /* Allow charger turn-on time (it could be gradual). */
115
116 ascodec_read(AS3514_IRQ_ENRD0); /* Clear out interrupts (important!) */
117
118 charge_state = CHARGING;
119 charger_total_timer = CHARGER_TOTAL_TIMER;
120 battery_voltage_sync();
121}
122
123void powermgmt_init_target(void)
124{
125 /* Everything CHARGER, OFF! */
126 ascodec_write(AS3514_IRQ_ENRD0, 0);
127 ascodec_write(AS3514_CHARGER,
128 TMPSUP_OFF | CHG_I_50MA | CHG_V_3_90V | CHG_OFF);
129}
130
131static inline void charger_plugged(void)
132{
133 batt_threshold = BATT_FULL_VOLTAGE; /* Start with topped value. */
134 battery_voltage_sync();
135}
136
137static inline void charger_control(void)
138{
139 switch (charge_state)
140 {
141 case DISCHARGING:
142 {
143 unsigned int millivolts;
144 unsigned int thresh = batt_threshold;
145
146 if (BATT_FULL_VOLTAGE == thresh)
147 {
148 /* Wait for CHG_status to be indicated. */
149 if ((ascodec_read(AS3514_IRQ_ENRD0) & CHG_STATUS) == 0)
150 break;
151
152 batt_threshold = BATT_VAUTO_RECHARGE;
153 }
154
155 millivolts = battery_voltage();
156
157 if (millivolts <= thresh)
158 enable_charger();
159 break;
160 } /* DISCHARGING: */
161
162 case CHARGING:
163 {
164 if ((ascodec_read(AS3514_IRQ_ENRD0) & CHG_ENDOFCH) == 0)
165 {
166 if (--charger_total_timer > 0)
167 break;
168
169 /* Timer ran out - require replug. */
170 charge_state = CHARGE_STATE_ERROR;
171 }
172 /* else end of charge */
173
174 disable_charger();
175 break;
176 } /* CHARGING: */
177
178 default:
179 /* DISABLED, ERROR */
180 break;
181 }
182}
183
184static inline void charger_unplugged(void)
185{
186 disable_charger();
187 if (charge_state >= CHARGE_STATE_ERROR)
188 charge_state = DISCHARGING; /* Reset error */
189}
190
191/* Main charging algorithm - called from powermgmt.c */
192void charging_algorithm_step(void)
193{
194 switch (charger_input_state)
195 {
196 case NO_CHARGER:
197 /* Nothing to do */
198 break;
199
200 case CHARGER_PLUGGED:
201 charger_plugged();
202 break;
203
204 case CHARGER:
205 charger_control();
206 break;
207
208 case CHARGER_UNPLUGGED:
209 charger_unplugged();
210 break;
211 }
212
213 if (charger_close)
214 {
215 /* Disable further charging and ack. */
216 charge_state = CHARGE_STATE_DISABLED;
217 disable_charger();
218 charger_close = false;
219 }
220}
221
222/* Disable the charger and prepare for poweroff - called off-thread so we
223 * signal the charging thread to prepare to quit. */
224void charging_algorithm_close(void)
225{
226 charger_close = true;
227
228 /* Power management thread will set it false again. */
229 while (charger_close)
230 sleep(HZ/10);
231}
diff --git a/firmware/target/arm/sandisk/powermgmt-target.h b/firmware/target/arm/sandisk/powermgmt-target.h
new file mode 100644
index 0000000000..aa6a0e0e3d
--- /dev/null
+++ b/firmware/target/arm/sandisk/powermgmt-target.h
@@ -0,0 +1,59 @@
1/***************************************************************************
2 * __________ __ ___.
3 * Open \______ \ ____ ____ | | _\_ |__ _______ ___
4 * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
5 * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
6 * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
7 * \/ \/ \/ \/ \/
8 * $Id$
9 *
10 * Copyright (C) 2009 by Michael Sevakis
11 * Copyright (C) 2008 by Bertrik Sikken
12 *
13 * This program is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU General Public License
15 * as published by the Free Software Foundation; either version 2
16 * of the License, or (at your option) any later version.
17 *
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
20 *
21 ****************************************************************************/
22#ifndef POWERMGMT_TARGET_H
23#define POWERMGMT_TARGET_H
24
25#if defined(SANSA_C200)
26/* This configuration triggers a single charge cycle upon plugging and stops.
27 * The true voltage cannot be read accurately and so monitoring isn't really
28 * possible. The battery filter is still synced to have a proper reading
29 * when disconnecting. */
30#define BATT_FULL_VOLTAGE 5121 /* Won't read this high - force start */
31#define BATT_VAUTO_RECHARGE 0 /* Won't read this low - force one cycle */
32#define BATT_CHG_V CHG_V_4_20V
33#define BATT_CHG_I CHG_I_300MA
34#define CHARGER_TOTAL_TIMER (4*3600*2) /* 4 hours enough? */
35#define ADC_BATTERY ADC_BVDD
36#elif defined(SANSA_E200)
37/* PREFERRED - Check if topped-off and monitor voltage while plugged. */
38#define BATT_FULL_VOLTAGE 4160
39#define BATT_VAUTO_RECHARGE 4100
40#define BATT_CHG_V CHG_V_4_20V
41#define BATT_CHG_I CHG_I_300MA
42#define CHARGER_TOTAL_TIMER (4*3600*2) /* 4 hours enough? */
43/* On e200 ADC_RTCSUP seems to represent battery voltage better than
44 * ADC_BVDD during charging (ADC_BVDD is way too high) and appears the
45 * same in normal use.
46 */
47#define ADC_BATTERY ADC_RTCSUP
48#endif
49
50void powermgmt_init_target(void);
51void charging_algorithm_step(void);
52void charging_algorithm_close(void);
53
54/* We want to be able to reset the averaging filter */
55#define HAVE_RESET_BATTERY_FILTER
56
57#define BATT_AVE_SAMPLES 32
58
59#endif /* POWERMGMT_TARGET_H */
diff --git a/firmware/target/arm/sandisk/sansa-c200/powermgmt-c200.c b/firmware/target/arm/sandisk/sansa-c200/powermgmt-c200.c
index 963e7218de..9d7a0e2965 100644
--- a/firmware/target/arm/sandisk/sansa-c200/powermgmt-c200.c
+++ b/firmware/target/arm/sandisk/sansa-c200/powermgmt-c200.c
@@ -38,8 +38,8 @@ const unsigned short battery_level_shutoff[BATTERY_TYPES_COUNT] =
38const unsigned short percent_to_volt_discharge[BATTERY_TYPES_COUNT][11] = 38const unsigned short percent_to_volt_discharge[BATTERY_TYPES_COUNT][11] =
39{ 39{
40 40
41 /* NOTE: why is the top voltage 4237? That's just too high. */
41 { 3286, 3679, 3734, 3764, 3788, 3824, 3886, 3950, 4014, 4098, 4237 }, 42 { 3286, 3679, 3734, 3764, 3788, 3824, 3886, 3950, 4014, 4098, 4237 },
42
43}; 43};
44 44
45/* voltages (millivolt) of 0%, 10%, ... 100% when charging enabled */ 45/* voltages (millivolt) of 0%, 10%, ... 100% when charging enabled */
@@ -48,14 +48,3 @@ const unsigned short percent_to_volt_charge[11] =
48 /* Sansa c200 has a 530 mAh LiPo battery */ 48 /* Sansa c200 has a 530 mAh LiPo battery */
49 3300, 3390, 3480, 3570, 3660, 3750, 3840, 3930, 4020, 4110, 4200 49 3300, 3390, 3480, 3570, 3660, 3750, 3840, 3930, 4020, 4110, 4200
50}; 50};
51
52/* ADC should read 0x3ff=5.12V */
53#define BATTERY_SCALE_FACTOR 5125
54/* full-scale ADC readout (2^10) in millivolt */
55
56/* Returns battery voltage from ADC [millivolts] */
57unsigned int battery_adc_voltage(void)
58{
59 return (adc_read(ADC_UNREG_POWER) * BATTERY_SCALE_FACTOR) >> 10;
60}
61
diff --git a/firmware/target/arm/sandisk/sansa-e200/powermgmt-e200.c b/firmware/target/arm/sandisk/sansa-e200/powermgmt-e200.c
index 43f37463f8..144ca37ebf 100644
--- a/firmware/target/arm/sandisk/sansa-e200/powermgmt-e200.c
+++ b/firmware/target/arm/sandisk/sansa-e200/powermgmt-e200.c
@@ -47,14 +47,3 @@ const unsigned short percent_to_volt_charge[11] =
47 /* Sansa Li Ion 750mAH FIXME */ 47 /* Sansa Li Ion 750mAH FIXME */
48 3300, 3680, 3740, 3760, 3780, 3810, 3870, 3930, 3970, 4070, 4160 48 3300, 3680, 3740, 3760, 3780, 3810, 3870, 3930, 3970, 4070, 4160
49}; 49};
50
51/* ADC should read 0x3ff=5.12V */
52#define BATTERY_SCALE_FACTOR 5125
53/* full-scale ADC readout (2^10) in millivolt */
54
55/* Returns battery voltage from ADC [millivolts] */
56unsigned int battery_adc_voltage(void)
57{
58 return (adc_read(ADC_UNREG_POWER) * BATTERY_SCALE_FACTOR) >> 10;
59}
60
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