aboutsummaryrefslogtreecommitdiff
path: root/drivers/power/pcf50633-charger.c
blob: 41aec2acbb916ceb3d5c6ce0072408f91075bec2 (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
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
/* NXP PCF50633 Main Battery Charger Driver
 *
 * (C) 2006-2008 by Openmoko, Inc.
 * Author: Balaji Rao <balajirrao@openmoko.org>
 * All rights reserved.
 *
 * Broken down from monstrous PCF50633 driver mainly by
 * Harald Welte, Andy Green and Werner Almesberger
 *
 *  This program is free software; you can redistribute  it and/or modify it
 *  under  the terms of  the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the  License, or (at your
 *  option) any later version.
 *
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/device.h>
#include <linux/sysfs.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>

#include <linux/mfd/pcf50633/core.h>
#include <linux/mfd/pcf50633/mbc.h>

struct pcf50633_mbc {
	struct pcf50633 *pcf;

	int adapter_active;
	int adapter_online;
	int usb_active;
	int usb_online;

	struct power_supply usb;
	struct power_supply adapter;
};

int pcf50633_mbc_usb_curlim_set(struct pcf50633 *pcf, int ma)
{
	struct pcf50633_mbc *mbc = platform_get_drvdata(pcf->mbc_pdev);
	int ret = 0;
	u8 bits;

	if (ma >= 1000)
		bits = PCF50633_MBCC7_USB_1000mA;
	else if (ma >= 500)
		bits = PCF50633_MBCC7_USB_500mA;
	else if (ma >= 100)
		bits = PCF50633_MBCC7_USB_100mA;
	else
		bits = PCF50633_MBCC7_USB_SUSPEND;

	ret = pcf50633_reg_set_bit_mask(pcf, PCF50633_REG_MBCC7,
					PCF50633_MBCC7_USB_MASK, bits);
	if (ret)
		dev_err(pcf->dev, "error setting usb curlim to %d mA\n", ma);
	else
		dev_info(pcf->dev, "usb curlim to %d mA\n", ma);

	power_supply_changed(&mbc->usb);

	return ret;
}
EXPORT_SYMBOL_GPL(pcf50633_mbc_usb_curlim_set);

int pcf50633_mbc_get_status(struct pcf50633 *pcf)
{
	struct pcf50633_mbc *mbc  = platform_get_drvdata(pcf->mbc_pdev);
	int status = 0;

	if (mbc->usb_online)
		status |= PCF50633_MBC_USB_ONLINE;
	if (mbc->usb_active)
		status |= PCF50633_MBC_USB_ACTIVE;
	if (mbc->adapter_online)
		status |= PCF50633_MBC_ADAPTER_ONLINE;
	if (mbc->adapter_active)
		status |= PCF50633_MBC_ADAPTER_ACTIVE;

	return status;
}
EXPORT_SYMBOL_GPL(pcf50633_mbc_get_status);

void pcf50633_mbc_set_status(struct pcf50633 *pcf, int what, int status)
{
	struct pcf50633_mbc *mbc = platform_get_drvdata(pcf->mbc_pdev);

	if (what & PCF50633_MBC_USB_ONLINE)
		mbc->usb_online = !!status;
	if (what & PCF50633_MBC_USB_ACTIVE)
		mbc->usb_active = !!status;
	if (what & PCF50633_MBC_ADAPTER_ONLINE)
		mbc->adapter_online = !!status;
	if (what & PCF50633_MBC_ADAPTER_ACTIVE)
		mbc->adapter_active = !!status;
}
EXPORT_SYMBOL_GPL(pcf50633_mbc_set_status);

static ssize_t
show_chgmode(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct pcf50633_mbc *mbc = dev_get_drvdata(dev);

	u8 mbcs2 = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCS2);
	u8 chgmod = (mbcs2 & PCF50633_MBCS2_MBC_MASK);

	return sprintf(buf, "%d\n", chgmod);
}
static DEVICE_ATTR(chgmode, S_IRUGO, show_chgmode, NULL);

static ssize_t
show_usblim(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct pcf50633_mbc *mbc = dev_get_drvdata(dev);
	u8 usblim = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCC7) &
						PCF50633_MBCC7_USB_MASK;
	unsigned int ma;

	if (usblim == PCF50633_MBCC7_USB_1000mA)
		ma = 1000;
	else if (usblim == PCF50633_MBCC7_USB_500mA)
		ma = 500;
	else if (usblim == PCF50633_MBCC7_USB_100mA)
		ma = 100;
	else
		ma = 0;

	return sprintf(buf, "%u\n", ma);
}

static ssize_t set_usblim(struct device *dev,
		struct device_attribute *attr, const char *buf, size_t count)
{
	struct pcf50633_mbc *mbc = dev_get_drvdata(dev);
	unsigned long ma;
	int ret;

	ret = strict_strtoul(buf, 10, &ma);
	if (ret)
		return -EINVAL;

	pcf50633_mbc_usb_curlim_set(mbc->pcf, ma);

	return count;
}

static DEVICE_ATTR(usb_curlim, S_IRUGO | S_IWUSR, show_usblim, set_usblim);

static struct attribute *pcf50633_mbc_sysfs_entries[] = {
	&dev_attr_chgmode.attr,
	&dev_attr_usb_curlim.attr,
	NULL,
};

static struct attribute_group mbc_attr_group = {
	.name	= NULL,			/* put in device directory */
	.attrs	= pcf50633_mbc_sysfs_entries,
};

static void
pcf50633_mbc_irq_handler(int irq, void *data)
{
	struct pcf50633_mbc *mbc = data;

	/* USB */
	if (irq == PCF50633_IRQ_USBINS) {
		mbc->usb_online = 1;
	} else if (irq == PCF50633_IRQ_USBREM) {
		mbc->usb_online = 0;
		mbc->usb_active = 0;
		pcf50633_mbc_usb_curlim_set(mbc->pcf, 0);
	}

	/* Adapter */
	if (irq == PCF50633_IRQ_ADPINS) {
		mbc->adapter_online = 1;
		mbc->adapter_active = 1;
	} else if (irq == PCF50633_IRQ_ADPREM) {
		mbc->adapter_online = 0;
		mbc->adapter_active = 0;
	}

	if (irq == PCF50633_IRQ_BATFULL) {
		mbc->usb_active = 0;
		mbc->adapter_active = 0;
	}

	power_supply_changed(&mbc->usb);
	power_supply_changed(&mbc->adapter);

	if (mbc->pcf->pdata->mbc_event_callback)
		mbc->pcf->pdata->mbc_event_callback(mbc->pcf, irq);
}

static int adapter_get_property(struct power_supply *psy,
			enum power_supply_property psp,
			union power_supply_propval *val)
{
	struct pcf50633_mbc *mbc = container_of(psy,
				struct pcf50633_mbc, adapter);
	int ret = 0;

	switch (psp) {
	case POWER_SUPPLY_PROP_ONLINE:
		val->intval =  mbc->adapter_online;
		break;
	default:
		ret = -EINVAL;
		break;
	}
	return ret;
}

static int usb_get_property(struct power_supply *psy,
			enum power_supply_property psp,
			union power_supply_propval *val)
{
	struct pcf50633_mbc *mbc = container_of(psy, struct pcf50633_mbc, usb);
	int ret = 0;

	switch (psp) {
	case POWER_SUPPLY_PROP_ONLINE:
		val->intval = mbc->usb_online;
		break;
	default:
		ret = -EINVAL;
		break;
	}
	return ret;
}

static enum power_supply_property power_props[] = {
	POWER_SUPPLY_PROP_ONLINE,
};

static const u8 mbc_irq_handlers[] = {
	PCF50633_IRQ_ADPINS,
	PCF50633_IRQ_ADPREM,
	PCF50633_IRQ_USBINS,
	PCF50633_IRQ_USBREM,
	PCF50633_IRQ_BATFULL,
	PCF50633_IRQ_CHGHALT,
	PCF50633_IRQ_THLIMON,
	PCF50633_IRQ_THLIMOFF,
	PCF50633_IRQ_USBLIMON,
	PCF50633_IRQ_USBLIMOFF,
	PCF50633_IRQ_LOWSYS,
	PCF50633_IRQ_LOWBAT,
};

static int __devinit pcf50633_mbc_probe(struct platform_device *pdev)
{
	struct pcf50633_mbc *mbc;
	struct pcf50633_subdev_pdata *pdata = pdev->dev.platform_data;
	int ret;
	int i;
	u8 mbcs1;

	mbc = kzalloc(sizeof(*mbc), GFP_KERNEL);
	if (!mbc)
		return -ENOMEM;

	platform_set_drvdata(pdev, mbc);
	mbc->pcf = pdata->pcf;

	/* Set up IRQ handlers */
	for (i = 0; i < ARRAY_SIZE(mbc_irq_handlers); i++)
		pcf50633_register_irq(mbc->pcf, mbc_irq_handlers[i],
					pcf50633_mbc_irq_handler, mbc);

	/* Create power supplies */
	mbc->adapter.name		= "adapter";
	mbc->adapter.type		= POWER_SUPPLY_TYPE_MAINS;
	mbc->adapter.properties		= power_props;
	mbc->adapter.num_properties	= ARRAY_SIZE(power_props);
	mbc->adapter.get_property	= &adapter_get_property;
	mbc->adapter.supplied_to	= mbc->pcf->pdata->batteries;
	mbc->adapter.num_supplicants	= mbc->pcf->pdata->num_batteries;

	mbc->usb.name			= "usb";
	mbc->usb.type			= POWER_SUPPLY_TYPE_USB;
	mbc->usb.properties		= power_props;
	mbc->usb.num_properties		= ARRAY_SIZE(power_props);
	mbc->usb.get_property		= usb_get_property;
	mbc->usb.supplied_to		= mbc->pcf->pdata->batteries;
	mbc->usb.num_supplicants	= mbc->pcf->pdata->num_batteries;

	ret = power_supply_register(&pdev->dev, &mbc->adapter);
	if (ret) {
		dev_err(mbc->pcf->dev, "failed to register adapter\n");
		kfree(mbc);
		return ret;
	}

	ret = power_supply_register(&pdev->dev, &mbc->usb);
	if (ret) {
		dev_err(mbc->pcf->dev, "failed to register usb\n");
		power_supply_unregister(&mbc->adapter);
		kfree(mbc);
		return ret;
	}

	ret = sysfs_create_group(&pdev->dev.kobj, &mbc_attr_group);
	if (ret)
		dev_err(mbc->pcf->dev, "failed to create sysfs entries\n");

	mbcs1 = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCS1);
	if (mbcs1 & PCF50633_MBCS1_USBPRES)
		pcf50633_mbc_irq_handler(PCF50633_IRQ_USBINS, mbc);
	if (mbcs1 & PCF50633_MBCS1_ADAPTPRES)
		pcf50633_mbc_irq_handler(PCF50633_IRQ_ADPINS, mbc);

	return 0;
}

static int __devexit pcf50633_mbc_remove(struct platform_device *pdev)
{
	struct pcf50633_mbc *mbc = platform_get_drvdata(pdev);
	int i;

	/* Remove IRQ handlers */
	for (i = 0; i < ARRAY_SIZE(mbc_irq_handlers); i++)
		pcf50633_free_irq(mbc->pcf, mbc_irq_handlers[i]);

	power_supply_unregister(&mbc->usb);
	power_supply_unregister(&mbc->adapter);

	kfree(mbc);

	return 0;
}

static struct platform_driver pcf50633_mbc_driver = {
	.driver = {
		.name = "pcf50633-mbc",
	},
	.probe = pcf50633_mbc_probe,
	.remove = __devexit_p(pcf50633_mbc_remove),
};

static int __init pcf50633_mbc_init(void)
{
	return platform_driver_register(&pcf50633_mbc_driver);
}
module_init(pcf50633_mbc_init);

static void __exit pcf50633_mbc_exit(void)
{
	platform_driver_unregister(&pcf50633_mbc_driver);
}
module_exit(pcf50633_mbc_exit);

MODULE_AUTHOR("Balaji Rao <balajirrao@openmoko.org>");
MODULE_DESCRIPTION("PCF50633 mbc driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:pcf50633-mbc");