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
181
182
183
184
185
186
187
188
189
190
191
|
#include <linux/module.h>
#include <linux/types.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/device.h>
#include <linux/err.h>
#include <linux/power_supply.h>
#include <linux/thermal.h>
#include <linux/power/battery_id.h>
#include "power_supply.h"
#include "power_supply_charger.h"
/* 98% of CV is considered as voltage to detect Full */
#define FULL_CV_MIN 98
/* Offset to exit from maintenance charging. In maintenance charging
* if the volatge is less than the (maintenance_lower_threshold -
* MAINT_EXIT_OFFSET) then system can switch to normal charging
*/
#define MAINT_EXIT_OFFSET 50 /* mV */
static int get_tempzone(struct ps_pse_mod_prof *pse_mod_bprof,
int temp)
{
int i = 0;
int temp_range_cnt = min_t(u16, pse_mod_bprof->temp_mon_ranges,
BATT_TEMP_NR_RNG);
if ((temp < pse_mod_bprof->temp_low_lim) ||
(temp > pse_mod_bprof->temp_mon_range[0].temp_up_lim))
return -EINVAL;
for (i = 0; i < temp_range_cnt; ++i)
if (temp > pse_mod_bprof->temp_mon_range[i].temp_up_lim)
break;
return i-1;
}
static inline bool __is_battery_full
(long volt, long cur, long iterm, unsigned long cv)
{
pr_devel("%s:current=%d pse_mod_bprof->chrg_term_ma =%d voltage_now=%d full_cond=%d",
__func__, cur, iterm, volt * 100, (FULL_CV_MIN * cv));
return ((cur > 0) && (cur <= iterm) &&
((volt * 100) >= (FULL_CV_MIN * cv)));
}
static inline bool is_battery_full(struct batt_props bat_prop,
struct ps_pse_mod_prof *pse_mod_bprof, unsigned long cv)
{
int i;
/* Software full detection. Check the battery charge current to detect
* battery Full. The voltage also verified to avoid false charge
* full detection.
*/
pr_devel("%s:current=%d pse_mod_bprof->chrg_term_ma =%d bat_prop.voltage_now=%d full_cond=%d",
__func__, bat_prop.current_now, (pse_mod_bprof->chrg_term_ma),
bat_prop.voltage_now * 100, (FULL_CV_MIN * cv));
for (i = (MAX_CUR_VOLT_SAMPLES - 1); i >= 0; --i) {
if (!(__is_battery_full(bat_prop.voltage_now_cache[i],
bat_prop.current_now_cache[i],
pse_mod_bprof->chrg_term_ma, cv)))
return false;
}
return true;
}
static int pse_get_bat_thresholds(struct ps_batt_chg_prof bprof,
struct psy_batt_thresholds *bat_thresh)
{
struct ps_pse_mod_prof *pse_mod_bprof =
(struct ps_pse_mod_prof *) bprof.batt_prof;
if ((bprof.chrg_prof_type != PSE_MOD_CHRG_PROF) || (!pse_mod_bprof))
return -EINVAL;
bat_thresh->iterm = pse_mod_bprof->chrg_term_ma;
bat_thresh->temp_min = pse_mod_bprof->temp_low_lim;
bat_thresh->temp_max = pse_mod_bprof->temp_mon_range[0].temp_up_lim;
return 0;
}
static enum psy_algo_stat pse_get_next_cc_cv(struct batt_props bat_prop,
struct ps_batt_chg_prof bprof, unsigned long *cc, unsigned long *cv)
{
int tzone;
struct ps_pse_mod_prof *pse_mod_bprof =
(struct ps_pse_mod_prof *) bprof.batt_prof;
enum psy_algo_stat algo_stat = bat_prop.algo_stat;
int maint_exit_volt;
*cc = *cv = 0;
/* If STATUS is discharging, assume that charger is not connected.
* If charger is not connected, no need to take any action.
* If charge profile type is not PSE_MOD_CHRG_PROF or the charge profile
* is not present, no need to take any action.
*/
pr_devel("%s:battery status = %d algo_status=%d\n",
__func__, bat_prop.status, algo_stat);
if ((bprof.chrg_prof_type != PSE_MOD_CHRG_PROF) || (!pse_mod_bprof))
return PSY_ALGO_STAT_NOT_CHARGE;
tzone = get_tempzone(pse_mod_bprof, bat_prop.temperature);
if (tzone < 0)
return PSY_ALGO_STAT_NOT_CHARGE;
/* Change the algo status to not charging, if battery is
* not really charging or less than maintenance exit threshold.
* This way algorithm can switch to normal
* charging if current status is full/maintenace
*/
maint_exit_volt = pse_mod_bprof->
temp_mon_range[tzone].maint_chrg_vol_ll -
MAINT_EXIT_OFFSET;
if ((bat_prop.status == POWER_SUPPLY_STATUS_DISCHARGING) ||
(bat_prop.status == POWER_SUPPLY_STATUS_NOT_CHARGING) ||
bat_prop.voltage_now < maint_exit_volt) {
algo_stat = PSY_ALGO_STAT_NOT_CHARGE;
}
/* read cc and cv based on temperature and algorithm status*/
if (algo_stat == PSY_ALGO_STAT_FULL ||
algo_stat == PSY_ALGO_STAT_MAINT) {
/* if status is full and voltage is lower than maintenance lower
* threshold change status to maintenenance
*/
if (algo_stat == PSY_ALGO_STAT_FULL) {
*cv = pse_mod_bprof->temp_mon_range
[tzone].full_chrg_vol;
*cc = pse_mod_bprof->temp_mon_range
[tzone].full_chrg_cur;
}
if (algo_stat == PSY_ALGO_STAT_FULL && (bat_prop.voltage_now <=
pse_mod_bprof->temp_mon_range[tzone].maint_chrg_vol_ll))
algo_stat = PSY_ALGO_STAT_MAINT;
/* Read maintenance CC and CV */
if (algo_stat == PSY_ALGO_STAT_MAINT) {
*cv = pse_mod_bprof->temp_mon_range
[tzone].maint_chrg_vol_ul;
*cc = pse_mod_bprof->temp_mon_range
[tzone].maint_chrg_cur;
}
} else {
*cv = pse_mod_bprof->temp_mon_range[tzone].full_chrg_vol;
*cc = pse_mod_bprof->temp_mon_range[tzone].full_chrg_cur;
algo_stat = PSY_ALGO_STAT_CHARGE;
}
if (bat_prop.voltage_now > *cv) {
algo_stat = PSY_ALGO_STAT_NOT_CHARGE;
return algo_stat;
}
if (algo_stat == PSY_ALGO_STAT_FULL)
return algo_stat;
if (is_battery_full(bat_prop, pse_mod_bprof, *cv))
algo_stat = PSY_ALGO_STAT_FULL;
return algo_stat;
}
static int __init pse_algo_init(void)
{
struct charging_algo pse_algo;
pse_algo.chrg_prof_type = PSE_MOD_CHRG_PROF;
pse_algo.name = "pse_algo";
pse_algo.get_next_cc_cv = pse_get_next_cc_cv;
pse_algo.get_batt_thresholds = pse_get_bat_thresholds;
power_supply_register_charging_algo(&pse_algo);
return 0;
}
module_init(pse_algo_init);
|
