drm/i915: SDVO hotplug have different interrupt status bits for i915/i965/g4x
[linux-2.6.git] / drivers / power / pmu_battery.c
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 #include <linux/slab.h>
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;
93                 else if (pmu_power_flags & PMU_PWR_AC_PRESENT)
94                         val->intval = POWER_SUPPLY_STATUS_FULL;
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
165                 sprintf(pbat->name, "PMU_battery_%d", i);
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);
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");