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-rw-r--r--drivers/power/pcf50633-charger.c358
1 files changed, 358 insertions, 0 deletions
diff --git a/drivers/power/pcf50633-charger.c b/drivers/power/pcf50633-charger.c
new file mode 100644
index 000000000000..e988ec130fcd
--- /dev/null
+++ b/drivers/power/pcf50633-charger.c
@@ -0,0 +1,358 @@
1/* NXP PCF50633 Main Battery Charger Driver
2 *
3 * (C) 2006-2008 by Openmoko, Inc.
4 * Author: Balaji Rao <balajirrao@openmoko.org>
5 * All rights reserved.
6 *
7 * Broken down from monstrous PCF50633 driver mainly by
8 * Harald Welte, Andy Green and Werner Almesberger
9 *
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by the
12 * Free Software Foundation; either version 2 of the License, or (at your
13 * option) any later version.
14 *
15 */
16
17#include <linux/kernel.h>
18#include <linux/module.h>
19#include <linux/init.h>
20#include <linux/types.h>
21#include <linux/device.h>
22#include <linux/sysfs.h>
23#include <linux/platform_device.h>
24#include <linux/power_supply.h>
25
26#include <linux/mfd/pcf50633/core.h>
27#include <linux/mfd/pcf50633/mbc.h>
28
29struct pcf50633_mbc {
30 struct pcf50633 *pcf;
31
32 int adapter_active;
33 int adapter_online;
34 int usb_active;
35 int usb_online;
36
37 struct power_supply usb;
38 struct power_supply adapter;
39};
40
41int pcf50633_mbc_usb_curlim_set(struct pcf50633 *pcf, int ma)
42{
43 struct pcf50633_mbc *mbc = platform_get_drvdata(pcf->mbc_pdev);
44 int ret = 0;
45 u8 bits;
46
47 if (ma >= 1000)
48 bits = PCF50633_MBCC7_USB_1000mA;
49 else if (ma >= 500)
50 bits = PCF50633_MBCC7_USB_500mA;
51 else if (ma >= 100)
52 bits = PCF50633_MBCC7_USB_100mA;
53 else
54 bits = PCF50633_MBCC7_USB_SUSPEND;
55
56 ret = pcf50633_reg_set_bit_mask(pcf, PCF50633_REG_MBCC7,
57 PCF50633_MBCC7_USB_MASK, bits);
58 if (ret)
59 dev_err(pcf->dev, "error setting usb curlim to %d mA\n", ma);
60 else
61 dev_info(pcf->dev, "usb curlim to %d mA\n", ma);
62
63 power_supply_changed(&mbc->usb);
64
65 return ret;
66}
67EXPORT_SYMBOL_GPL(pcf50633_mbc_usb_curlim_set);
68
69int pcf50633_mbc_get_status(struct pcf50633 *pcf)
70{
71 struct pcf50633_mbc *mbc = platform_get_drvdata(pcf->mbc_pdev);
72 int status = 0;
73
74 if (mbc->usb_online)
75 status |= PCF50633_MBC_USB_ONLINE;
76 if (mbc->usb_active)
77 status |= PCF50633_MBC_USB_ACTIVE;
78 if (mbc->adapter_online)
79 status |= PCF50633_MBC_ADAPTER_ONLINE;
80 if (mbc->adapter_active)
81 status |= PCF50633_MBC_ADAPTER_ACTIVE;
82
83 return status;
84}
85EXPORT_SYMBOL_GPL(pcf50633_mbc_get_status);
86
87void pcf50633_mbc_set_status(struct pcf50633 *pcf, int what, int status)
88{
89 struct pcf50633_mbc *mbc = platform_get_drvdata(pcf->mbc_pdev);
90
91 if (what & PCF50633_MBC_USB_ONLINE)
92 mbc->usb_online = !!status;
93 if (what & PCF50633_MBC_USB_ACTIVE)
94 mbc->usb_active = !!status;
95 if (what & PCF50633_MBC_ADAPTER_ONLINE)
96 mbc->adapter_online = !!status;
97 if (what & PCF50633_MBC_ADAPTER_ACTIVE)
98 mbc->adapter_active = !!status;
99}
100EXPORT_SYMBOL_GPL(pcf50633_mbc_set_status);
101
102static ssize_t
103show_chgmode(struct device *dev, struct device_attribute *attr, char *buf)
104{
105 struct pcf50633_mbc *mbc = dev_get_drvdata(dev);
106
107 u8 mbcs2 = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCS2);
108 u8 chgmod = (mbcs2 & PCF50633_MBCS2_MBC_MASK);
109
110 return sprintf(buf, "%d\n", chgmod);
111}
112static DEVICE_ATTR(chgmode, S_IRUGO, show_chgmode, NULL);
113
114static ssize_t
115show_usblim(struct device *dev, struct device_attribute *attr, char *buf)
116{
117 struct pcf50633_mbc *mbc = dev_get_drvdata(dev);
118 u8 usblim = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCC7) &
119 PCF50633_MBCC7_USB_MASK;
120 unsigned int ma;
121
122 if (usblim == PCF50633_MBCC7_USB_1000mA)
123 ma = 1000;
124 else if (usblim == PCF50633_MBCC7_USB_500mA)
125 ma = 500;
126 else if (usblim == PCF50633_MBCC7_USB_100mA)
127 ma = 100;
128 else
129 ma = 0;
130
131 return sprintf(buf, "%u\n", ma);
132}
133
134static ssize_t set_usblim(struct device *dev,
135 struct device_attribute *attr, const char *buf, size_t count)
136{
137 struct pcf50633_mbc *mbc = dev_get_drvdata(dev);
138 unsigned long ma;
139 int ret;
140
141 ret = strict_strtoul(buf, 10, &ma);
142 if (ret)
143 return -EINVAL;
144
145 pcf50633_mbc_usb_curlim_set(mbc->pcf, ma);
146
147 return count;
148}
149
150static DEVICE_ATTR(usb_curlim, S_IRUGO | S_IWUSR, show_usblim, set_usblim);
151
152static struct attribute *pcf50633_mbc_sysfs_entries[] = {
153 &dev_attr_chgmode.attr,
154 &dev_attr_usb_curlim.attr,
155 NULL,
156};
157
158static struct attribute_group mbc_attr_group = {
159 .name = NULL, /* put in device directory */
160 .attrs = pcf50633_mbc_sysfs_entries,
161};
162
163static void
164pcf50633_mbc_irq_handler(int irq, void *data)
165{
166 struct pcf50633_mbc *mbc = data;
167
168 /* USB */
169 if (irq == PCF50633_IRQ_USBINS) {
170 mbc->usb_online = 1;
171 } else if (irq == PCF50633_IRQ_USBREM) {
172 mbc->usb_online = 0;
173 mbc->usb_active = 0;
174 pcf50633_mbc_usb_curlim_set(mbc->pcf, 0);
175 }
176
177 /* Adapter */
178 if (irq == PCF50633_IRQ_ADPINS) {
179 mbc->adapter_online = 1;
180 mbc->adapter_active = 1;
181 } else if (irq == PCF50633_IRQ_ADPREM) {
182 mbc->adapter_online = 0;
183 mbc->adapter_active = 0;
184 }
185
186 if (irq == PCF50633_IRQ_BATFULL) {
187 mbc->usb_active = 0;
188 mbc->adapter_active = 0;
189 }
190
191 power_supply_changed(&mbc->usb);
192 power_supply_changed(&mbc->adapter);
193
194 if (mbc->pcf->pdata->mbc_event_callback)
195 mbc->pcf->pdata->mbc_event_callback(mbc->pcf, irq);
196}
197
198static int adapter_get_property(struct power_supply *psy,
199 enum power_supply_property psp,
200 union power_supply_propval *val)
201{
202 struct pcf50633_mbc *mbc = container_of(psy, struct pcf50633_mbc, usb);
203 int ret = 0;
204
205 switch (psp) {
206 case POWER_SUPPLY_PROP_ONLINE:
207 val->intval = mbc->adapter_online;
208 break;
209 default:
210 ret = -EINVAL;
211 break;
212 }
213 return ret;
214}
215
216static int usb_get_property(struct power_supply *psy,
217 enum power_supply_property psp,
218 union power_supply_propval *val)
219{
220 struct pcf50633_mbc *mbc = container_of(psy, struct pcf50633_mbc, usb);
221 int ret = 0;
222
223 switch (psp) {
224 case POWER_SUPPLY_PROP_ONLINE:
225 val->intval = mbc->usb_online;
226 break;
227 default:
228 ret = -EINVAL;
229 break;
230 }
231 return ret;
232}
233
234static enum power_supply_property power_props[] = {
235 POWER_SUPPLY_PROP_ONLINE,
236};
237
238static const u8 mbc_irq_handlers[] = {
239 PCF50633_IRQ_ADPINS,
240 PCF50633_IRQ_ADPREM,
241 PCF50633_IRQ_USBINS,
242 PCF50633_IRQ_USBREM,
243 PCF50633_IRQ_BATFULL,
244 PCF50633_IRQ_CHGHALT,
245 PCF50633_IRQ_THLIMON,
246 PCF50633_IRQ_THLIMOFF,
247 PCF50633_IRQ_USBLIMON,
248 PCF50633_IRQ_USBLIMOFF,
249 PCF50633_IRQ_LOWSYS,
250 PCF50633_IRQ_LOWBAT,
251};
252
253static int __devinit pcf50633_mbc_probe(struct platform_device *pdev)
254{
255 struct pcf50633_mbc *mbc;
256 struct pcf50633_subdev_pdata *pdata = pdev->dev.platform_data;
257 int ret;
258 int i;
259 u8 mbcs1;
260
261 mbc = kzalloc(sizeof(*mbc), GFP_KERNEL);
262 if (!mbc)
263 return -ENOMEM;
264
265 platform_set_drvdata(pdev, mbc);
266 mbc->pcf = pdata->pcf;
267
268 /* Set up IRQ handlers */
269 for (i = 0; i < ARRAY_SIZE(mbc_irq_handlers); i++)
270 pcf50633_register_irq(mbc->pcf, mbc_irq_handlers[i],
271 pcf50633_mbc_irq_handler, mbc);
272
273 /* Create power supplies */
274 mbc->adapter.name = "adapter";
275 mbc->adapter.type = POWER_SUPPLY_TYPE_MAINS;
276 mbc->adapter.properties = power_props;
277 mbc->adapter.num_properties = ARRAY_SIZE(power_props);
278 mbc->adapter.get_property = &adapter_get_property;
279 mbc->adapter.supplied_to = mbc->pcf->pdata->batteries;
280 mbc->adapter.num_supplicants = mbc->pcf->pdata->num_batteries;
281
282 mbc->usb.name = "usb";
283 mbc->usb.type = POWER_SUPPLY_TYPE_USB;
284 mbc->usb.properties = power_props;
285 mbc->usb.num_properties = ARRAY_SIZE(power_props);
286 mbc->usb.get_property = usb_get_property;
287 mbc->usb.supplied_to = mbc->pcf->pdata->batteries;
288 mbc->usb.num_supplicants = mbc->pcf->pdata->num_batteries;
289
290 ret = power_supply_register(&pdev->dev, &mbc->adapter);
291 if (ret) {
292 dev_err(mbc->pcf->dev, "failed to register adapter\n");
293 kfree(mbc);
294 return ret;
295 }
296
297 ret = power_supply_register(&pdev->dev, &mbc->usb);
298 if (ret) {
299 dev_err(mbc->pcf->dev, "failed to register usb\n");
300 power_supply_unregister(&mbc->adapter);
301 kfree(mbc);
302 return ret;
303 }
304
305 ret = sysfs_create_group(&pdev->dev.kobj, &mbc_attr_group);
306 if (ret)
307 dev_err(mbc->pcf->dev, "failed to create sysfs entries\n");
308
309 mbcs1 = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCS1);
310 if (mbcs1 & PCF50633_MBCS1_USBPRES)
311 pcf50633_mbc_irq_handler(PCF50633_IRQ_USBINS, mbc);
312 if (mbcs1 & PCF50633_MBCS1_ADAPTPRES)
313 pcf50633_mbc_irq_handler(PCF50633_IRQ_ADPINS, mbc);
314
315 return 0;
316}
317
318static int __devexit pcf50633_mbc_remove(struct platform_device *pdev)
319{
320 struct pcf50633_mbc *mbc = platform_get_drvdata(pdev);
321 int i;
322
323 /* Remove IRQ handlers */
324 for (i = 0; i < ARRAY_SIZE(mbc_irq_handlers); i++)
325 pcf50633_free_irq(mbc->pcf, mbc_irq_handlers[i]);
326
327 power_supply_unregister(&mbc->usb);
328 power_supply_unregister(&mbc->adapter);
329
330 kfree(mbc);
331
332 return 0;
333}
334
335static struct platform_driver pcf50633_mbc_driver = {
336 .driver = {
337 .name = "pcf50633-mbc",
338 },
339 .probe = pcf50633_mbc_probe,
340 .remove = __devexit_p(pcf50633_mbc_remove),
341};
342
343static int __init pcf50633_mbc_init(void)
344{
345 return platform_driver_register(&pcf50633_mbc_driver);
346}
347module_init(pcf50633_mbc_init);
348
349static void __exit pcf50633_mbc_exit(void)
350{
351 platform_driver_unregister(&pcf50633_mbc_driver);
352}
353module_exit(pcf50633_mbc_exit);
354
355MODULE_AUTHOR("Balaji Rao <balajirrao@openmoko.org>");
356MODULE_DESCRIPTION("PCF50633 mbc driver");
357MODULE_LICENSE("GPL");
358MODULE_ALIAS("platform:pcf50633-mbc");
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-14 16:38:56 -0500