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11#include <linux/module.h>
12#include <linux/platform_device.h>
13#include <linux/err.h>
14#include <linux/power_supply.h>
15#include <linux/adb.h>
16#include <linux/pmu.h>
17#include <linux/slab.h>
18
19static struct pmu_battery_dev {
20 struct power_supply *bat;
21 struct power_supply_desc bat_desc;
22 struct pmu_battery_info *pbi;
23 char name[16];
24 int propval;
25} *pbats[PMU_MAX_BATTERIES];
26
27#define to_pmu_battery_dev(x) power_supply_get_drvdata(x)
28
29
30
31
32
33static int pmu_get_ac_prop(struct power_supply *psy,
34 enum power_supply_property psp,
35 union power_supply_propval *val)
36{
37 switch (psp) {
38 case POWER_SUPPLY_PROP_ONLINE:
39 val->intval = (!!(pmu_power_flags & PMU_PWR_AC_PRESENT)) ||
40 (pmu_battery_count == 0);
41 break;
42 default:
43 return -EINVAL;
44 }
45
46 return 0;
47}
48
49static enum power_supply_property pmu_ac_props[] = {
50 POWER_SUPPLY_PROP_ONLINE,
51};
52
53static const struct power_supply_desc pmu_ac_desc = {
54 .name = "pmu-ac",
55 .type = POWER_SUPPLY_TYPE_MAINS,
56 .properties = pmu_ac_props,
57 .num_properties = ARRAY_SIZE(pmu_ac_props),
58 .get_property = pmu_get_ac_prop,
59};
60
61static struct power_supply *pmu_ac;
62
63
64
65
66
67static char *pmu_batt_types[] = {
68 "Smart", "Comet", "Hooper", "Unknown"
69};
70
71static char *pmu_bat_get_model_name(struct pmu_battery_info *pbi)
72{
73 switch (pbi->flags & PMU_BATT_TYPE_MASK) {
74 case PMU_BATT_TYPE_SMART:
75 return pmu_batt_types[0];
76 case PMU_BATT_TYPE_COMET:
77 return pmu_batt_types[1];
78 case PMU_BATT_TYPE_HOOPER:
79 return pmu_batt_types[2];
80 default: break;
81 }
82 return pmu_batt_types[3];
83}
84
85static int pmu_bat_get_property(struct power_supply *psy,
86 enum power_supply_property psp,
87 union power_supply_propval *val)
88{
89 struct pmu_battery_dev *pbat = to_pmu_battery_dev(psy);
90 struct pmu_battery_info *pbi = pbat->pbi;
91
92 switch (psp) {
93 case POWER_SUPPLY_PROP_STATUS:
94 if (pbi->flags & PMU_BATT_CHARGING)
95 val->intval = POWER_SUPPLY_STATUS_CHARGING;
96 else if (pmu_power_flags & PMU_PWR_AC_PRESENT)
97 val->intval = POWER_SUPPLY_STATUS_FULL;
98 else
99 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
100 break;
101 case POWER_SUPPLY_PROP_PRESENT:
102 val->intval = !!(pbi->flags & PMU_BATT_PRESENT);
103 break;
104 case POWER_SUPPLY_PROP_MODEL_NAME:
105 val->strval = pmu_bat_get_model_name(pbi);
106 break;
107 case POWER_SUPPLY_PROP_ENERGY_AVG:
108 val->intval = pbi->charge * 1000;
109 break;
110 case POWER_SUPPLY_PROP_ENERGY_FULL:
111 val->intval = pbi->max_charge * 1000;
112 break;
113 case POWER_SUPPLY_PROP_CURRENT_AVG:
114 val->intval = pbi->amperage * 1000;
115 break;
116 case POWER_SUPPLY_PROP_VOLTAGE_AVG:
117 val->intval = pbi->voltage * 1000;
118 break;
119 case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG:
120 val->intval = pbi->time_remaining;
121 break;
122 default:
123 return -EINVAL;
124 }
125
126 return 0;
127}
128
129static enum power_supply_property pmu_bat_props[] = {
130 POWER_SUPPLY_PROP_STATUS,
131 POWER_SUPPLY_PROP_PRESENT,
132 POWER_SUPPLY_PROP_MODEL_NAME,
133 POWER_SUPPLY_PROP_ENERGY_AVG,
134 POWER_SUPPLY_PROP_ENERGY_FULL,
135 POWER_SUPPLY_PROP_CURRENT_AVG,
136 POWER_SUPPLY_PROP_VOLTAGE_AVG,
137 POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
138};
139
140
141
142
143
144static struct platform_device *bat_pdev;
145
146static int __init pmu_bat_init(void)
147{
148 int ret = 0;
149 int i;
150
151 bat_pdev = platform_device_register_simple("pmu-battery",
152 0, NULL, 0);
153 if (IS_ERR(bat_pdev)) {
154 ret = PTR_ERR(bat_pdev);
155 goto pdev_register_failed;
156 }
157
158 pmu_ac = power_supply_register(&bat_pdev->dev, &pmu_ac_desc, NULL);
159 if (IS_ERR(pmu_ac)) {
160 ret = PTR_ERR(pmu_ac);
161 goto ac_register_failed;
162 }
163
164 for (i = 0; i < pmu_battery_count; i++) {
165 struct power_supply_config psy_cfg = {};
166 struct pmu_battery_dev *pbat = kzalloc(sizeof(*pbat),
167 GFP_KERNEL);
168 if (!pbat)
169 break;
170
171 sprintf(pbat->name, "PMU_battery_%d", i);
172 pbat->bat_desc.name = pbat->name;
173 pbat->bat_desc.properties = pmu_bat_props;
174 pbat->bat_desc.num_properties = ARRAY_SIZE(pmu_bat_props);
175 pbat->bat_desc.get_property = pmu_bat_get_property;
176 pbat->pbi = &pmu_batteries[i];
177 psy_cfg.drv_data = pbat;
178
179 pbat->bat = power_supply_register(&bat_pdev->dev,
180 &pbat->bat_desc,
181 &psy_cfg);
182 if (IS_ERR(pbat->bat)) {
183 ret = PTR_ERR(pbat->bat);
184 kfree(pbat);
185 goto battery_register_failed;
186 }
187 pbats[i] = pbat;
188 }
189
190 goto success;
191
192battery_register_failed:
193 while (i--) {
194 if (!pbats[i])
195 continue;
196 power_supply_unregister(pbats[i]->bat);
197 kfree(pbats[i]);
198 }
199 power_supply_unregister(pmu_ac);
200ac_register_failed:
201 platform_device_unregister(bat_pdev);
202pdev_register_failed:
203success:
204 return ret;
205}
206
207static void __exit pmu_bat_exit(void)
208{
209 int i;
210
211 for (i = 0; i < PMU_MAX_BATTERIES; i++) {
212 if (!pbats[i])
213 continue;
214 power_supply_unregister(pbats[i]->bat);
215 kfree(pbats[i]);
216 }
217 power_supply_unregister(pmu_ac);
218 platform_device_unregister(bat_pdev);
219}
220
221module_init(pmu_bat_init);
222module_exit(pmu_bat_exit);
223
224MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
225MODULE_LICENSE("GPL");
226MODULE_DESCRIPTION("PMU battery driver");
227
