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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
efea58e3 DW |
2 | /* |
3 | * Battery class driver for Apple PMU | |
4 | * | |
5 | * Copyright © 2006 David Woodhouse <dwmw2@infradead.org> | |
efea58e3 DW |
6 | */ |
7 | ||
8 | #include <linux/module.h> | |
9 | #include <linux/platform_device.h> | |
10 | #include <linux/err.h> | |
11 | #include <linux/power_supply.h> | |
12 | #include <linux/adb.h> | |
13 | #include <linux/pmu.h> | |
5a0e3ad6 | 14 | #include <linux/slab.h> |
efea58e3 DW |
15 | |
16 | static struct pmu_battery_dev { | |
297d716f KK |
17 | struct power_supply *bat; |
18 | struct power_supply_desc bat_desc; | |
efea58e3 DW |
19 | struct pmu_battery_info *pbi; |
20 | char name[16]; | |
21 | int propval; | |
22 | } *pbats[PMU_MAX_BATTERIES]; | |
23 | ||
297d716f | 24 | #define to_pmu_battery_dev(x) power_supply_get_drvdata(x) |
efea58e3 DW |
25 | |
26 | /********************************************************************* | |
27 | * Power | |
28 | *********************************************************************/ | |
29 | ||
30 | static int pmu_get_ac_prop(struct power_supply *psy, | |
31 | enum power_supply_property psp, | |
32 | union power_supply_propval *val) | |
33 | { | |
34 | switch (psp) { | |
35 | case POWER_SUPPLY_PROP_ONLINE: | |
36 | val->intval = (!!(pmu_power_flags & PMU_PWR_AC_PRESENT)) || | |
37 | (pmu_battery_count == 0); | |
38 | break; | |
39 | default: | |
40 | return -EINVAL; | |
41 | } | |
42 | ||
43 | return 0; | |
44 | } | |
45 | ||
46 | static enum power_supply_property pmu_ac_props[] = { | |
47 | POWER_SUPPLY_PROP_ONLINE, | |
48 | }; | |
49 | ||
297d716f | 50 | static const struct power_supply_desc pmu_ac_desc = { |
efea58e3 DW |
51 | .name = "pmu-ac", |
52 | .type = POWER_SUPPLY_TYPE_MAINS, | |
53 | .properties = pmu_ac_props, | |
54 | .num_properties = ARRAY_SIZE(pmu_ac_props), | |
55 | .get_property = pmu_get_ac_prop, | |
56 | }; | |
57 | ||
297d716f KK |
58 | static struct power_supply *pmu_ac; |
59 | ||
efea58e3 DW |
60 | /********************************************************************* |
61 | * Battery properties | |
62 | *********************************************************************/ | |
63 | ||
64 | static char *pmu_batt_types[] = { | |
65 | "Smart", "Comet", "Hooper", "Unknown" | |
66 | }; | |
67 | ||
68 | static char *pmu_bat_get_model_name(struct pmu_battery_info *pbi) | |
69 | { | |
70 | switch (pbi->flags & PMU_BATT_TYPE_MASK) { | |
71 | case PMU_BATT_TYPE_SMART: | |
72 | return pmu_batt_types[0]; | |
73 | case PMU_BATT_TYPE_COMET: | |
74 | return pmu_batt_types[1]; | |
75 | case PMU_BATT_TYPE_HOOPER: | |
76 | return pmu_batt_types[2]; | |
77 | default: break; | |
78 | } | |
79 | return pmu_batt_types[3]; | |
80 | } | |
81 | ||
82 | static int pmu_bat_get_property(struct power_supply *psy, | |
83 | enum power_supply_property psp, | |
84 | union power_supply_propval *val) | |
85 | { | |
86 | struct pmu_battery_dev *pbat = to_pmu_battery_dev(psy); | |
87 | struct pmu_battery_info *pbi = pbat->pbi; | |
88 | ||
89 | switch (psp) { | |
90 | case POWER_SUPPLY_PROP_STATUS: | |
91 | if (pbi->flags & PMU_BATT_CHARGING) | |
92 | val->intval = POWER_SUPPLY_STATUS_CHARGING; | |
d54e7929 TC |
93 | else if (pmu_power_flags & PMU_PWR_AC_PRESENT) |
94 | val->intval = POWER_SUPPLY_STATUS_FULL; | |
efea58e3 DW |
95 | else |
96 | val->intval = POWER_SUPPLY_STATUS_DISCHARGING; | |
97 | break; | |
98 | case POWER_SUPPLY_PROP_PRESENT: | |
99 | val->intval = !!(pbi->flags & PMU_BATT_PRESENT); | |
100 | break; | |
101 | case POWER_SUPPLY_PROP_MODEL_NAME: | |
102 | val->strval = pmu_bat_get_model_name(pbi); | |
103 | break; | |
104 | case POWER_SUPPLY_PROP_ENERGY_AVG: | |
105 | val->intval = pbi->charge * 1000; /* mWh -> µWh */ | |
106 | break; | |
107 | case POWER_SUPPLY_PROP_ENERGY_FULL: | |
108 | val->intval = pbi->max_charge * 1000; /* mWh -> µWh */ | |
109 | break; | |
110 | case POWER_SUPPLY_PROP_CURRENT_AVG: | |
111 | val->intval = pbi->amperage * 1000; /* mA -> µA */ | |
112 | break; | |
113 | case POWER_SUPPLY_PROP_VOLTAGE_AVG: | |
114 | val->intval = pbi->voltage * 1000; /* mV -> µV */ | |
115 | break; | |
116 | case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG: | |
117 | val->intval = pbi->time_remaining; | |
118 | break; | |
119 | default: | |
120 | return -EINVAL; | |
121 | } | |
122 | ||
123 | return 0; | |
124 | } | |
125 | ||
126 | static enum power_supply_property pmu_bat_props[] = { | |
127 | POWER_SUPPLY_PROP_STATUS, | |
128 | POWER_SUPPLY_PROP_PRESENT, | |
129 | POWER_SUPPLY_PROP_MODEL_NAME, | |
130 | POWER_SUPPLY_PROP_ENERGY_AVG, | |
131 | POWER_SUPPLY_PROP_ENERGY_FULL, | |
132 | POWER_SUPPLY_PROP_CURRENT_AVG, | |
133 | POWER_SUPPLY_PROP_VOLTAGE_AVG, | |
134 | POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG, | |
135 | }; | |
136 | ||
137 | /********************************************************************* | |
138 | * Initialisation | |
139 | *********************************************************************/ | |
140 | ||
141 | static struct platform_device *bat_pdev; | |
142 | ||
143 | static int __init pmu_bat_init(void) | |
144 | { | |
297d716f | 145 | int ret = 0; |
efea58e3 DW |
146 | int i; |
147 | ||
148 | bat_pdev = platform_device_register_simple("pmu-battery", | |
149 | 0, NULL, 0); | |
150 | if (IS_ERR(bat_pdev)) { | |
151 | ret = PTR_ERR(bat_pdev); | |
152 | goto pdev_register_failed; | |
153 | } | |
154 | ||
297d716f KK |
155 | pmu_ac = power_supply_register(&bat_pdev->dev, &pmu_ac_desc, NULL); |
156 | if (IS_ERR(pmu_ac)) { | |
157 | ret = PTR_ERR(pmu_ac); | |
efea58e3 | 158 | goto ac_register_failed; |
297d716f | 159 | } |
efea58e3 DW |
160 | |
161 | for (i = 0; i < pmu_battery_count; i++) { | |
297d716f | 162 | struct power_supply_config psy_cfg = {}; |
efea58e3 DW |
163 | struct pmu_battery_dev *pbat = kzalloc(sizeof(*pbat), |
164 | GFP_KERNEL); | |
165 | if (!pbat) | |
166 | break; | |
167 | ||
35bf5591 | 168 | sprintf(pbat->name, "PMU_battery_%d", i); |
297d716f KK |
169 | pbat->bat_desc.name = pbat->name; |
170 | pbat->bat_desc.properties = pmu_bat_props; | |
171 | pbat->bat_desc.num_properties = ARRAY_SIZE(pmu_bat_props); | |
172 | pbat->bat_desc.get_property = pmu_bat_get_property; | |
efea58e3 | 173 | pbat->pbi = &pmu_batteries[i]; |
297d716f | 174 | psy_cfg.drv_data = pbat; |
efea58e3 | 175 | |
297d716f KK |
176 | pbat->bat = power_supply_register(&bat_pdev->dev, |
177 | &pbat->bat_desc, | |
178 | &psy_cfg); | |
179 | if (IS_ERR(pbat->bat)) { | |
180 | ret = PTR_ERR(pbat->bat); | |
efea58e3 DW |
181 | kfree(pbat); |
182 | goto battery_register_failed; | |
183 | } | |
184 | pbats[i] = pbat; | |
185 | } | |
186 | ||
187 | goto success; | |
188 | ||
189 | battery_register_failed: | |
190 | while (i--) { | |
191 | if (!pbats[i]) | |
192 | continue; | |
297d716f | 193 | power_supply_unregister(pbats[i]->bat); |
efea58e3 DW |
194 | kfree(pbats[i]); |
195 | } | |
297d716f | 196 | power_supply_unregister(pmu_ac); |
efea58e3 DW |
197 | ac_register_failed: |
198 | platform_device_unregister(bat_pdev); | |
199 | pdev_register_failed: | |
200 | success: | |
201 | return ret; | |
202 | } | |
203 | ||
204 | static void __exit pmu_bat_exit(void) | |
205 | { | |
206 | int i; | |
207 | ||
208 | for (i = 0; i < PMU_MAX_BATTERIES; i++) { | |
209 | if (!pbats[i]) | |
210 | continue; | |
297d716f | 211 | power_supply_unregister(pbats[i]->bat); |
efea58e3 DW |
212 | kfree(pbats[i]); |
213 | } | |
297d716f | 214 | power_supply_unregister(pmu_ac); |
efea58e3 | 215 | platform_device_unregister(bat_pdev); |
efea58e3 DW |
216 | } |
217 | ||
218 | module_init(pmu_bat_init); | |
219 | module_exit(pmu_bat_exit); | |
220 | ||
221 | MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>"); | |
222 | MODULE_LICENSE("GPL"); | |
223 | MODULE_DESCRIPTION("PMU battery driver"); |