1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
|
// SPDX-License-Identifier: GPL-2.0
/*
* Power supply driver for the goldfish emulator
*
* Copyright (C) 2008 Google, Inc.
* Copyright (C) 2012 Intel, Inc.
* Copyright (C) 2013 Intel, Inc.
* Author: Mike Lockwood <lockwood@android.com>
*/
#include <linux/module.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/types.h>
#include <linux/pci.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/acpi.h>
struct goldfish_battery_data {
void __iomem *reg_base;
int irq;
spinlock_t lock;
struct power_supply *battery;
struct power_supply *ac;
};
#define GOLDFISH_BATTERY_READ(data, addr) \
(readl(data->reg_base + addr))
#define GOLDFISH_BATTERY_WRITE(data, addr, x) \
(writel(x, data->reg_base + addr))
enum {
/* status register */
BATTERY_INT_STATUS = 0x00,
/* set this to enable IRQ */
BATTERY_INT_ENABLE = 0x04,
BATTERY_AC_ONLINE = 0x08,
BATTERY_STATUS = 0x0C,
BATTERY_HEALTH = 0x10,
BATTERY_PRESENT = 0x14,
BATTERY_CAPACITY = 0x18,
BATTERY_VOLTAGE = 0x1C,
BATTERY_TEMP = 0x20,
BATTERY_CHARGE_COUNTER = 0x24,
BATTERY_VOLTAGE_MAX = 0x28,
BATTERY_CURRENT_MAX = 0x2C,
BATTERY_CURRENT_NOW = 0x30,
BATTERY_CURRENT_AVG = 0x34,
BATTERY_CHARGE_FULL_UAH = 0x38,
BATTERY_CYCLE_COUNT = 0x40,
BATTERY_STATUS_CHANGED = 1U << 0,
AC_STATUS_CHANGED = 1U << 1,
BATTERY_INT_MASK = BATTERY_STATUS_CHANGED | AC_STATUS_CHANGED,
};
static int goldfish_ac_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct goldfish_battery_data *data = power_supply_get_drvdata(psy);
int ret = 0;
switch (psp) {
case POWER_SUPPLY_PROP_ONLINE:
val->intval = GOLDFISH_BATTERY_READ(data, BATTERY_AC_ONLINE);
break;
case POWER_SUPPLY_PROP_VOLTAGE_MAX:
val->intval = GOLDFISH_BATTERY_READ(data, BATTERY_VOLTAGE_MAX);
break;
case POWER_SUPPLY_PROP_CURRENT_MAX:
val->intval = GOLDFISH_BATTERY_READ(data, BATTERY_CURRENT_MAX);
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
static int goldfish_battery_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct goldfish_battery_data *data = power_supply_get_drvdata(psy);
int ret = 0;
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
val->intval = GOLDFISH_BATTERY_READ(data, BATTERY_STATUS);
break;
case POWER_SUPPLY_PROP_HEALTH:
val->intval = GOLDFISH_BATTERY_READ(data, BATTERY_HEALTH);
break;
case POWER_SUPPLY_PROP_PRESENT:
val->intval = GOLDFISH_BATTERY_READ(data, BATTERY_PRESENT);
break;
case POWER_SUPPLY_PROP_TECHNOLOGY:
val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
break;
case POWER_SUPPLY_PROP_CAPACITY:
val->intval = GOLDFISH_BATTERY_READ(data, BATTERY_CAPACITY);
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
val->intval = GOLDFISH_BATTERY_READ(data, BATTERY_VOLTAGE);
break;
case POWER_SUPPLY_PROP_TEMP:
val->intval = GOLDFISH_BATTERY_READ(data, BATTERY_TEMP);
break;
case POWER_SUPPLY_PROP_CHARGE_COUNTER:
val->intval = GOLDFISH_BATTERY_READ(data,
BATTERY_CHARGE_COUNTER);
break;
case POWER_SUPPLY_PROP_CURRENT_NOW:
val->intval = GOLDFISH_BATTERY_READ(data, BATTERY_CURRENT_NOW);
break;
case POWER_SUPPLY_PROP_CURRENT_AVG:
val->intval = GOLDFISH_BATTERY_READ(data, BATTERY_CURRENT_AVG);
break;
case POWER_SUPPLY_PROP_CHARGE_FULL:
val->intval = GOLDFISH_BATTERY_READ(data,
BATTERY_CHARGE_FULL_UAH);
break;
case POWER_SUPPLY_PROP_CYCLE_COUNT:
val->intval = GOLDFISH_BATTERY_READ(data, BATTERY_CYCLE_COUNT);
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
static enum power_supply_property goldfish_battery_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_TEMP,
POWER_SUPPLY_PROP_CHARGE_COUNTER,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CURRENT_AVG,
POWER_SUPPLY_PROP_CHARGE_FULL,
POWER_SUPPLY_PROP_CYCLE_COUNT,
};
static enum power_supply_property goldfish_ac_props[] = {
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_VOLTAGE_MAX,
POWER_SUPPLY_PROP_CURRENT_MAX,
};
static irqreturn_t goldfish_battery_interrupt(int irq, void *dev_id)
{
unsigned long irq_flags;
struct goldfish_battery_data *data = dev_id;
uint32_t status;
spin_lock_irqsave(&data->lock, irq_flags);
/* read status flags, which will clear the interrupt */
status = GOLDFISH_BATTERY_READ(data, BATTERY_INT_STATUS);
status &= BATTERY_INT_MASK;
if (status & BATTERY_STATUS_CHANGED)
power_supply_changed(data->battery);
if (status & AC_STATUS_CHANGED)
power_supply_changed(data->ac);
spin_unlock_irqrestore(&data->lock, irq_flags);
return status ? IRQ_HANDLED : IRQ_NONE;
}
static const struct power_supply_desc battery_desc = {
.properties = goldfish_battery_props,
.num_properties = ARRAY_SIZE(goldfish_battery_props),
.get_property = goldfish_battery_get_property,
.name = "battery",
.type = POWER_SUPPLY_TYPE_BATTERY,
};
static const struct power_supply_desc ac_desc = {
.properties = goldfish_ac_props,
.num_properties = ARRAY_SIZE(goldfish_ac_props),
.get_property = goldfish_ac_get_property,
.name = "ac",
.type = POWER_SUPPLY_TYPE_MAINS,
};
static int goldfish_battery_probe(struct platform_device *pdev)
{
int ret;
struct resource *r;
struct goldfish_battery_data *data;
struct power_supply_config psy_cfg = {};
data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
if (data == NULL)
return -ENOMEM;
spin_lock_init(&data->lock);
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (r == NULL) {
dev_err(&pdev->dev, "platform_get_resource failed\n");
return -ENODEV;
}
data->reg_base = devm_ioremap(&pdev->dev, r->start, resource_size(r));
if (data->reg_base == NULL) {
dev_err(&pdev->dev, "unable to remap MMIO\n");
return -ENOMEM;
}
data->irq = platform_get_irq(pdev, 0);
if (data->irq < 0)
return -ENODEV;
ret = devm_request_irq(&pdev->dev, data->irq,
goldfish_battery_interrupt,
IRQF_SHARED, pdev->name, data);
if (ret)
return ret;
psy_cfg.drv_data = data;
data->ac = power_supply_register(&pdev->dev, &ac_desc, &psy_cfg);
if (IS_ERR(data->ac))
return PTR_ERR(data->ac);
data->battery = power_supply_register(&pdev->dev, &battery_desc,
&psy_cfg);
if (IS_ERR(data->battery)) {
power_supply_unregister(data->ac);
return PTR_ERR(data->battery);
}
platform_set_drvdata(pdev, data);
GOLDFISH_BATTERY_WRITE(data, BATTERY_INT_ENABLE, BATTERY_INT_MASK);
return 0;
}
static void goldfish_battery_remove(struct platform_device *pdev)
{
struct goldfish_battery_data *data = platform_get_drvdata(pdev);
power_supply_unregister(data->battery);
power_supply_unregister(data->ac);
}
static const struct of_device_id goldfish_battery_of_match[] = {
{ .compatible = "google,goldfish-battery", },
{},
};
MODULE_DEVICE_TABLE(of, goldfish_battery_of_match);
#ifdef CONFIG_ACPI
static const struct acpi_device_id goldfish_battery_acpi_match[] = {
{ "GFSH0001", 0 },
{ },
};
MODULE_DEVICE_TABLE(acpi, goldfish_battery_acpi_match);
#endif
static struct platform_driver goldfish_battery_device = {
.probe = goldfish_battery_probe,
.remove_new = goldfish_battery_remove,
.driver = {
.name = "goldfish-battery",
.of_match_table = goldfish_battery_of_match,
.acpi_match_table = ACPI_PTR(goldfish_battery_acpi_match),
}
};
module_platform_driver(goldfish_battery_device);
MODULE_AUTHOR("Mike Lockwood lockwood@android.com");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Battery driver for the Goldfish emulator");
|
