aboutsummaryrefslogtreecommitdiffstats
path: root/target/linux/goldfish/patches-2.6.30/0126--ARM-goldfish-POWER-New-power-supply-driver-for-g.patch
blob: 4b5265ab37843722fbee2c8e777dce9af560d46b (plain)
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
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
From 7041346d379e563e9ee66f9dd31277e4fb6b1b1f Mon Sep 17 00:00:00 2001
From: Mike Lockwood <lockwood@android.com>
Date: Wed, 6 Feb 2008 11:37:10 -0500
Subject: [PATCH 126/134] [ARM] goldfish: POWER: New power supply driver for goldfish.

Signed-off-by: Mike A. Chan <mikechan@google.com>
---
 drivers/power/Kconfig            |    5 +
 drivers/power/Makefile           |    3 +-
 drivers/power/goldfish_battery.c |  254 ++++++++++++++++++++++++++++++++++++++
 3 files changed, 261 insertions(+), 1 deletions(-)
 create mode 100644 drivers/power/goldfish_battery.c

diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig
index 33da112..593c616 100644
--- a/drivers/power/Kconfig
+++ b/drivers/power/Kconfig
@@ -88,4 +88,9 @@ config CHARGER_PCF50633
 	help
 	 Say Y to include support for NXP PCF50633 Main Battery Charger.
 
+config BATTERY_GOLDFISH
+	tristate "Goldfish battery driver"
+	help
+	  Say Y to enable support for the battery and AC power in the Goldfish emulator.
+
 endif # POWER_SUPPLY
diff --git a/drivers/power/Makefile b/drivers/power/Makefile
index 2fcf41d..5be0fbb 100644
--- a/drivers/power/Makefile
+++ b/drivers/power/Makefile
@@ -19,10 +19,11 @@ obj-$(CONFIG_APM_POWER)		+= apm_power.o
 obj-$(CONFIG_WM8350_POWER)	+= wm8350_power.o
 
 obj-$(CONFIG_BATTERY_DS2760)	+= ds2760_battery.o
+obj-$(CONFIG_BATTERY_GOLDFISH)	+= goldfish_battery.o
 obj-$(CONFIG_BATTERY_PMU)	+= pmu_battery.o
 obj-$(CONFIG_BATTERY_OLPC)	+= olpc_battery.o
 obj-$(CONFIG_BATTERY_TOSA)	+= tosa_battery.o
 obj-$(CONFIG_BATTERY_WM97XX)	+= wm97xx_battery.o
 obj-$(CONFIG_BATTERY_BQ27x00)	+= bq27x00_battery.o
 obj-$(CONFIG_BATTERY_DA9030)	+= da9030_battery.o
-obj-$(CONFIG_CHARGER_PCF50633)	+= pcf50633-charger.o
\ No newline at end of file
+obj-$(CONFIG_CHARGER_PCF50633)	+= pcf50633-charger.o
diff --git a/drivers/power/goldfish_battery.c b/drivers/power/goldfish_battery.c
new file mode 100644
index 0000000..868dc83
--- /dev/null
+++ b/drivers/power/goldfish_battery.c
@@ -0,0 +1,254 @@
+/* drivers/power/goldfish_battery.c
+ *
+ * Power supply driver for the goldfish emulator
+ *
+ * Copyright (C) 2008 Google, Inc.
+ * Author: Mike Lockwood <lockwood@android.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#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 <asm/io.h>
+
+
+struct goldfish_battery_data {
+	uint32_t 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))
+
+
+/* temporary variable used between goldfish_battery_probe() and goldfish_battery_open() */
+static struct goldfish_battery_data *battery_data;
+
+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_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 = container_of(psy,
+		struct goldfish_battery_data, ac);
+	int ret = 0;
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_ONLINE:
+		val->intval = GOLDFISH_BATTERY_READ(data, BATTERY_AC_ONLINE);
+		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 = container_of(psy,
+		struct goldfish_battery_data, battery);
+	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;
+	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,
+};
+
+static enum power_supply_property goldfish_ac_props[] = {
+	POWER_SUPPLY_PROP_ONLINE,
+};
+
+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 int goldfish_battery_probe(struct platform_device *pdev)
+{
+	int ret;
+	struct resource *r;
+	struct goldfish_battery_data *data;
+
+	data = kzalloc(sizeof(*data), GFP_KERNEL);
+	if (data == NULL) {
+		ret = -ENOMEM;
+		goto err_data_alloc_failed;
+	}
+	spin_lock_init(&data->lock);
+
+	data->battery.properties = goldfish_battery_props;
+	data->battery.num_properties = ARRAY_SIZE(goldfish_battery_props);
+	data->battery.get_property = goldfish_battery_get_property;
+	data->battery.name = "battery";
+	data->battery.type = POWER_SUPPLY_TYPE_BATTERY;
+
+	data->ac.properties = goldfish_ac_props;
+	data->ac.num_properties = ARRAY_SIZE(goldfish_ac_props);
+	data->ac.get_property = goldfish_ac_get_property;
+	data->ac.name = "ac";
+	data->ac.type = POWER_SUPPLY_TYPE_MAINS;
+
+	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (r == NULL) {
+		printk(KERN_ERR "%s: platform_get_resource failed\n", pdev->name);
+		ret = -ENODEV;
+		goto err_no_io_base;
+	}
+	data->reg_base = IO_ADDRESS(r->start - IO_START);
+
+	data->irq = platform_get_irq(pdev, 0);
+	if (data->irq < 0) {
+		printk(KERN_ERR "%s: platform_get_irq failed\n", pdev->name);
+		ret = -ENODEV;
+		goto err_no_irq;
+	}
+
+	ret = request_irq(data->irq, goldfish_battery_interrupt, IRQF_SHARED, pdev->name, data);
+	if (ret)
+		goto err_request_irq_failed;
+
+	ret = power_supply_register(&pdev->dev, &data->ac);
+	if (ret)
+		goto err_ac_failed;
+
+	ret = power_supply_register(&pdev->dev, &data->battery);
+	if (ret)
+		goto err_battery_failed;
+
+	platform_set_drvdata(pdev, data);
+	battery_data = data;
+
+	GOLDFISH_BATTERY_WRITE(data, BATTERY_INT_ENABLE, BATTERY_INT_MASK);
+	return 0;
+
+err_battery_failed:
+	power_supply_unregister(&data->ac);
+err_ac_failed:
+	free_irq(data->irq, data);
+err_request_irq_failed:
+err_no_irq:
+err_no_io_base:
+	kfree(data);
+err_data_alloc_failed:
+	return ret;
+}
+
+static int 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);
+
+	free_irq(data->irq, data);
+	kfree(data);
+	battery_data = NULL;
+	return 0;
+}
+
+static struct platform_driver goldfish_battery_device = {
+	.probe		= goldfish_battery_probe,
+	.remove		= goldfish_battery_remove,
+	.driver = {
+		.name = "goldfish-battery"
+	}
+};
+
+static int __init goldfish_battery_init(void)
+{
+	return platform_driver_register(&goldfish_battery_device);
+}
+
+static void __exit goldfish_battery_exit(void)
+{
+	platform_driver_unregister(&goldfish_battery_device);
+}
+
+module_init(goldfish_battery_init);
+module_exit(goldfish_battery_exit);
+
+MODULE_AUTHOR("Mike Lockwood lockwood@android.com");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Battery driver for the Goldfish emulator");
-- 
1.6.2