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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 { | |
20 | struct power_supply bat; | |
21 | struct pmu_battery_info *pbi; | |
22 | char name[16]; | |
23 | int propval; | |
24 | } *pbats[PMU_MAX_BATTERIES]; | |
25 | ||
26 | #define to_pmu_battery_dev(x) container_of(x, struct pmu_battery_dev, bat) | |
27 | ||
28 | /********************************************************************* | |
29 | * Power | |
30 | *********************************************************************/ | |
31 | ||
32 | static int pmu_get_ac_prop(struct power_supply *psy, | |
33 | enum power_supply_property psp, | |
34 | union power_supply_propval *val) | |
35 | { | |
36 | switch (psp) { | |
37 | case POWER_SUPPLY_PROP_ONLINE: | |
38 | val->intval = (!!(pmu_power_flags & PMU_PWR_AC_PRESENT)) || | |
39 | (pmu_battery_count == 0); | |
40 | break; | |
41 | default: | |
42 | return -EINVAL; | |
43 | } | |
44 | ||
45 | return 0; | |
46 | } | |
47 | ||
48 | static enum power_supply_property pmu_ac_props[] = { | |
49 | POWER_SUPPLY_PROP_ONLINE, | |
50 | }; | |
51 | ||
52 | static struct power_supply pmu_ac = { | |
53 | .name = "pmu-ac", | |
54 | .type = POWER_SUPPLY_TYPE_MAINS, | |
55 | .properties = pmu_ac_props, | |
56 | .num_properties = ARRAY_SIZE(pmu_ac_props), | |
57 | .get_property = pmu_get_ac_prop, | |
58 | }; | |
59 | ||
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 | { | |
145 | int ret; | |
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 | ||
155 | ret = power_supply_register(&bat_pdev->dev, &pmu_ac); | |
156 | if (ret) | |
157 | goto ac_register_failed; | |
158 | ||
159 | for (i = 0; i < pmu_battery_count; i++) { | |
160 | struct pmu_battery_dev *pbat = kzalloc(sizeof(*pbat), | |
161 | GFP_KERNEL); | |
162 | if (!pbat) | |
163 | break; | |
164 | ||
35bf5591 | 165 | sprintf(pbat->name, "PMU_battery_%d", i); |
efea58e3 DW |
166 | pbat->bat.name = pbat->name; |
167 | pbat->bat.properties = pmu_bat_props; | |
168 | pbat->bat.num_properties = ARRAY_SIZE(pmu_bat_props); | |
169 | pbat->bat.get_property = pmu_bat_get_property; | |
170 | pbat->pbi = &pmu_batteries[i]; | |
171 | ||
172 | ret = power_supply_register(&bat_pdev->dev, &pbat->bat); | |
173 | if (ret) { | |
174 | kfree(pbat); | |
175 | goto battery_register_failed; | |
176 | } | |
177 | pbats[i] = pbat; | |
178 | } | |
179 | ||
180 | goto success; | |
181 | ||
182 | battery_register_failed: | |
183 | while (i--) { | |
184 | if (!pbats[i]) | |
185 | continue; | |
186 | power_supply_unregister(&pbats[i]->bat); | |
187 | kfree(pbats[i]); | |
188 | } | |
189 | power_supply_unregister(&pmu_ac); | |
190 | ac_register_failed: | |
191 | platform_device_unregister(bat_pdev); | |
192 | pdev_register_failed: | |
193 | success: | |
194 | return ret; | |
195 | } | |
196 | ||
197 | static void __exit pmu_bat_exit(void) | |
198 | { | |
199 | int i; | |
200 | ||
201 | for (i = 0; i < PMU_MAX_BATTERIES; i++) { | |
202 | if (!pbats[i]) | |
203 | continue; | |
204 | power_supply_unregister(&pbats[i]->bat); | |
205 | kfree(pbats[i]); | |
206 | } | |
207 | power_supply_unregister(&pmu_ac); | |
208 | platform_device_unregister(bat_pdev); | |
efea58e3 DW |
209 | } |
210 | ||
211 | module_init(pmu_bat_init); | |
212 | module_exit(pmu_bat_exit); | |
213 | ||
214 | MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>"); | |
215 | MODULE_LICENSE("GPL"); | |
216 | MODULE_DESCRIPTION("PMU battery driver"); |