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efea58e3 DW |
1 | /* |
2 | * Battery class driver for Apple PMU | |
3 | * | |
4 | * Copyright © 2006 David Woodhouse <dwmw2@infradead.org> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | */ | |
10 | ||
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> | |
5a0e3ad6 | 17 | #include <linux/slab.h> |
efea58e3 DW |
18 | |
19 | static struct pmu_battery_dev { | |
297d716f KK |
20 | struct power_supply *bat; |
21 | struct power_supply_desc bat_desc; | |
efea58e3 DW |
22 | struct pmu_battery_info *pbi; |
23 | char name[16]; | |
24 | int propval; | |
25 | } *pbats[PMU_MAX_BATTERIES]; | |
26 | ||
297d716f | 27 | #define to_pmu_battery_dev(x) power_supply_get_drvdata(x) |
efea58e3 DW |
28 | |
29 | /********************************************************************* | |
30 | * Power | |
31 | *********************************************************************/ | |
32 | ||
33 | static 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 | ||
49 | static enum power_supply_property pmu_ac_props[] = { | |
50 | POWER_SUPPLY_PROP_ONLINE, | |
51 | }; | |
52 | ||
297d716f | 53 | static const struct power_supply_desc pmu_ac_desc = { |
efea58e3 DW |
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 | ||
297d716f KK |
61 | static struct power_supply *pmu_ac; |
62 | ||
efea58e3 DW |
63 | /********************************************************************* |
64 | * Battery properties | |
65 | *********************************************************************/ | |
66 | ||
67 | static char *pmu_batt_types[] = { | |
68 | "Smart", "Comet", "Hooper", "Unknown" | |
69 | }; | |
70 | ||
71 | static 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 | ||
85 | static 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; | |
d54e7929 TC |
96 | else if (pmu_power_flags & PMU_PWR_AC_PRESENT) |
97 | val->intval = POWER_SUPPLY_STATUS_FULL; | |
efea58e3 DW |
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; /* mWh -> µWh */ | |
109 | break; | |
110 | case POWER_SUPPLY_PROP_ENERGY_FULL: | |
111 | val->intval = pbi->max_charge * 1000; /* mWh -> µWh */ | |
112 | break; | |
113 | case POWER_SUPPLY_PROP_CURRENT_AVG: | |
114 | val->intval = pbi->amperage * 1000; /* mA -> µA */ | |
115 | break; | |
116 | case POWER_SUPPLY_PROP_VOLTAGE_AVG: | |
117 | val->intval = pbi->voltage * 1000; /* mV -> µV */ | |
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 | ||
129 | static 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 | * Initialisation | |
142 | *********************************************************************/ | |
143 | ||
144 | static struct platform_device *bat_pdev; | |
145 | ||
146 | static int __init pmu_bat_init(void) | |
147 | { | |
297d716f | 148 | int ret = 0; |
efea58e3 DW |
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 | ||
297d716f KK |
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); | |
efea58e3 | 161 | goto ac_register_failed; |
297d716f | 162 | } |
efea58e3 DW |
163 | |
164 | for (i = 0; i < pmu_battery_count; i++) { | |
297d716f | 165 | struct power_supply_config psy_cfg = {}; |
efea58e3 DW |
166 | struct pmu_battery_dev *pbat = kzalloc(sizeof(*pbat), |
167 | GFP_KERNEL); | |
168 | if (!pbat) | |
169 | break; | |
170 | ||
35bf5591 | 171 | sprintf(pbat->name, "PMU_battery_%d", i); |
297d716f KK |
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; | |
efea58e3 | 176 | pbat->pbi = &pmu_batteries[i]; |
297d716f | 177 | psy_cfg.drv_data = pbat; |
efea58e3 | 178 | |
297d716f KK |
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); | |
efea58e3 DW |
184 | kfree(pbat); |
185 | goto battery_register_failed; | |
186 | } | |
187 | pbats[i] = pbat; | |
188 | } | |
189 | ||
190 | goto success; | |
191 | ||
192 | battery_register_failed: | |
193 | while (i--) { | |
194 | if (!pbats[i]) | |
195 | continue; | |
297d716f | 196 | power_supply_unregister(pbats[i]->bat); |
efea58e3 DW |
197 | kfree(pbats[i]); |
198 | } | |
297d716f | 199 | power_supply_unregister(pmu_ac); |
efea58e3 DW |
200 | ac_register_failed: |
201 | platform_device_unregister(bat_pdev); | |
202 | pdev_register_failed: | |
203 | success: | |
204 | return ret; | |
205 | } | |
206 | ||
207 | static 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; | |
297d716f | 214 | power_supply_unregister(pbats[i]->bat); |
efea58e3 DW |
215 | kfree(pbats[i]); |
216 | } | |
297d716f | 217 | power_supply_unregister(pmu_ac); |
efea58e3 | 218 | platform_device_unregister(bat_pdev); |
efea58e3 DW |
219 | } |
220 | ||
221 | module_init(pmu_bat_init); | |
222 | module_exit(pmu_bat_exit); | |
223 | ||
224 | MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>"); | |
225 | MODULE_LICENSE("GPL"); | |
226 | MODULE_DESCRIPTION("PMU battery driver"); |