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