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MyungJoo Ham527e7e92011-03-04 15:50:26 +09001/*
2 * max8997.c - mfd core driver for the Maxim 8966 and 8997
3 *
4 * Copyright (C) 2011 Samsung Electronics
5 * MyungJoo Ham <myungjoo.ham@smasung.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 *
21 * This driver is based on max8998.c
22 */
23
24#include <linux/slab.h>
25#include <linux/i2c.h>
MyungJoo Ham01fdaab2011-08-19 14:39:40 +090026#include <linux/interrupt.h>
MyungJoo Ham527e7e92011-03-04 15:50:26 +090027#include <linux/pm_runtime.h>
28#include <linux/mutex.h>
29#include <linux/mfd/core.h>
30#include <linux/mfd/max8997.h>
31#include <linux/mfd/max8997-private.h>
32
33#define I2C_ADDR_PMIC (0xCC >> 1)
34#define I2C_ADDR_MUIC (0x4A >> 1)
35#define I2C_ADDR_BATTERY (0x6C >> 1)
36#define I2C_ADDR_RTC (0x0C >> 1)
37#define I2C_ADDR_HAPTIC (0x90 >> 1)
38
39static struct mfd_cell max8997_devs[] = {
40 { .name = "max8997-pmic", },
41 { .name = "max8997-rtc", },
42 { .name = "max8997-battery", },
43 { .name = "max8997-haptic", },
44 { .name = "max8997-muic", },
45 { .name = "max8997-flash", },
46};
47
48int max8997_read_reg(struct i2c_client *i2c, u8 reg, u8 *dest)
49{
50 struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
51 int ret;
52
53 mutex_lock(&max8997->iolock);
54 ret = i2c_smbus_read_byte_data(i2c, reg);
55 mutex_unlock(&max8997->iolock);
56 if (ret < 0)
57 return ret;
58
59 ret &= 0xff;
60 *dest = ret;
61 return 0;
62}
63EXPORT_SYMBOL_GPL(max8997_read_reg);
64
65int max8997_bulk_read(struct i2c_client *i2c, u8 reg, int count, u8 *buf)
66{
67 struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
68 int ret;
69
70 mutex_lock(&max8997->iolock);
71 ret = i2c_smbus_read_i2c_block_data(i2c, reg, count, buf);
72 mutex_unlock(&max8997->iolock);
73 if (ret < 0)
74 return ret;
75
76 return 0;
77}
78EXPORT_SYMBOL_GPL(max8997_bulk_read);
79
80int max8997_write_reg(struct i2c_client *i2c, u8 reg, u8 value)
81{
82 struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
83 int ret;
84
85 mutex_lock(&max8997->iolock);
86 ret = i2c_smbus_write_byte_data(i2c, reg, value);
87 mutex_unlock(&max8997->iolock);
88 return ret;
89}
90EXPORT_SYMBOL_GPL(max8997_write_reg);
91
92int max8997_bulk_write(struct i2c_client *i2c, u8 reg, int count, u8 *buf)
93{
94 struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
95 int ret;
96
97 mutex_lock(&max8997->iolock);
98 ret = i2c_smbus_write_i2c_block_data(i2c, reg, count, buf);
99 mutex_unlock(&max8997->iolock);
100 if (ret < 0)
101 return ret;
102
103 return 0;
104}
105EXPORT_SYMBOL_GPL(max8997_bulk_write);
106
107int max8997_update_reg(struct i2c_client *i2c, u8 reg, u8 val, u8 mask)
108{
109 struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
110 int ret;
111
112 mutex_lock(&max8997->iolock);
113 ret = i2c_smbus_read_byte_data(i2c, reg);
114 if (ret >= 0) {
115 u8 old_val = ret & 0xff;
116 u8 new_val = (val & mask) | (old_val & (~mask));
117 ret = i2c_smbus_write_byte_data(i2c, reg, new_val);
118 }
119 mutex_unlock(&max8997->iolock);
120 return ret;
121}
122EXPORT_SYMBOL_GPL(max8997_update_reg);
123
124static int max8997_i2c_probe(struct i2c_client *i2c,
125 const struct i2c_device_id *id)
126{
127 struct max8997_dev *max8997;
128 struct max8997_platform_data *pdata = i2c->dev.platform_data;
129 int ret = 0;
130
131 max8997 = kzalloc(sizeof(struct max8997_dev), GFP_KERNEL);
132 if (max8997 == NULL)
133 return -ENOMEM;
134
135 i2c_set_clientdata(i2c, max8997);
136 max8997->dev = &i2c->dev;
137 max8997->i2c = i2c;
138 max8997->type = id->driver_data;
MyungJoo Ham7eb31542011-08-18 16:37:35 +0900139 max8997->irq = i2c->irq;
MyungJoo Ham527e7e92011-03-04 15:50:26 +0900140
141 if (!pdata)
142 goto err;
143
MyungJoo Ham7eb31542011-08-18 16:37:35 +0900144 max8997->irq_base = pdata->irq_base;
145 max8997->ono = pdata->ono;
MyungJoo Ham527e7e92011-03-04 15:50:26 +0900146
147 mutex_init(&max8997->iolock);
148
149 max8997->rtc = i2c_new_dummy(i2c->adapter, I2C_ADDR_RTC);
150 i2c_set_clientdata(max8997->rtc, max8997);
151 max8997->haptic = i2c_new_dummy(i2c->adapter, I2C_ADDR_HAPTIC);
152 i2c_set_clientdata(max8997->haptic, max8997);
153 max8997->muic = i2c_new_dummy(i2c->adapter, I2C_ADDR_MUIC);
154 i2c_set_clientdata(max8997->muic, max8997);
155
156 pm_runtime_set_active(max8997->dev);
157
MyungJoo Ham7eb31542011-08-18 16:37:35 +0900158 max8997_irq_init(max8997);
159
MyungJoo Ham527e7e92011-03-04 15:50:26 +0900160 mfd_add_devices(max8997->dev, -1, max8997_devs,
161 ARRAY_SIZE(max8997_devs),
162 NULL, 0);
163
164 /*
165 * TODO: enable others (flash, muic, rtc, battery, ...) and
166 * check the return value
167 */
168
169 if (ret < 0)
170 goto err_mfd;
171
MyungJoo Ham01fdaab2011-08-19 14:39:40 +0900172 /* MAX8997 has a power button input. */
173 device_init_wakeup(max8997->dev, pdata->wakeup);
174
MyungJoo Ham527e7e92011-03-04 15:50:26 +0900175 return ret;
176
177err_mfd:
178 mfd_remove_devices(max8997->dev);
179 i2c_unregister_device(max8997->muic);
180 i2c_unregister_device(max8997->haptic);
181 i2c_unregister_device(max8997->rtc);
182err:
183 kfree(max8997);
184 return ret;
185}
186
187static int max8997_i2c_remove(struct i2c_client *i2c)
188{
189 struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
190
191 mfd_remove_devices(max8997->dev);
192 i2c_unregister_device(max8997->muic);
193 i2c_unregister_device(max8997->haptic);
194 i2c_unregister_device(max8997->rtc);
195 kfree(max8997);
196
197 return 0;
198}
199
200static const struct i2c_device_id max8997_i2c_id[] = {
201 { "max8997", TYPE_MAX8997 },
202 { "max8966", TYPE_MAX8966 },
203 { }
204};
205MODULE_DEVICE_TABLE(i2c, max8998_i2c_id);
206
207u8 max8997_dumpaddr_pmic[] = {
208 MAX8997_REG_INT1MSK,
209 MAX8997_REG_INT2MSK,
210 MAX8997_REG_INT3MSK,
211 MAX8997_REG_INT4MSK,
212 MAX8997_REG_MAINCON1,
213 MAX8997_REG_MAINCON2,
214 MAX8997_REG_BUCKRAMP,
215 MAX8997_REG_BUCK1CTRL,
216 MAX8997_REG_BUCK1DVS1,
217 MAX8997_REG_BUCK1DVS2,
218 MAX8997_REG_BUCK1DVS3,
219 MAX8997_REG_BUCK1DVS4,
220 MAX8997_REG_BUCK1DVS5,
221 MAX8997_REG_BUCK1DVS6,
222 MAX8997_REG_BUCK1DVS7,
223 MAX8997_REG_BUCK1DVS8,
224 MAX8997_REG_BUCK2CTRL,
225 MAX8997_REG_BUCK2DVS1,
226 MAX8997_REG_BUCK2DVS2,
227 MAX8997_REG_BUCK2DVS3,
228 MAX8997_REG_BUCK2DVS4,
229 MAX8997_REG_BUCK2DVS5,
230 MAX8997_REG_BUCK2DVS6,
231 MAX8997_REG_BUCK2DVS7,
232 MAX8997_REG_BUCK2DVS8,
233 MAX8997_REG_BUCK3CTRL,
234 MAX8997_REG_BUCK3DVS,
235 MAX8997_REG_BUCK4CTRL,
236 MAX8997_REG_BUCK4DVS,
237 MAX8997_REG_BUCK5CTRL,
238 MAX8997_REG_BUCK5DVS1,
239 MAX8997_REG_BUCK5DVS2,
240 MAX8997_REG_BUCK5DVS3,
241 MAX8997_REG_BUCK5DVS4,
242 MAX8997_REG_BUCK5DVS5,
243 MAX8997_REG_BUCK5DVS6,
244 MAX8997_REG_BUCK5DVS7,
245 MAX8997_REG_BUCK5DVS8,
246 MAX8997_REG_BUCK6CTRL,
247 MAX8997_REG_BUCK6BPSKIPCTRL,
248 MAX8997_REG_BUCK7CTRL,
249 MAX8997_REG_BUCK7DVS,
250 MAX8997_REG_LDO1CTRL,
251 MAX8997_REG_LDO2CTRL,
252 MAX8997_REG_LDO3CTRL,
253 MAX8997_REG_LDO4CTRL,
254 MAX8997_REG_LDO5CTRL,
255 MAX8997_REG_LDO6CTRL,
256 MAX8997_REG_LDO7CTRL,
257 MAX8997_REG_LDO8CTRL,
258 MAX8997_REG_LDO9CTRL,
259 MAX8997_REG_LDO10CTRL,
260 MAX8997_REG_LDO11CTRL,
261 MAX8997_REG_LDO12CTRL,
262 MAX8997_REG_LDO13CTRL,
263 MAX8997_REG_LDO14CTRL,
264 MAX8997_REG_LDO15CTRL,
265 MAX8997_REG_LDO16CTRL,
266 MAX8997_REG_LDO17CTRL,
267 MAX8997_REG_LDO18CTRL,
268 MAX8997_REG_LDO21CTRL,
269 MAX8997_REG_MBCCTRL1,
270 MAX8997_REG_MBCCTRL2,
271 MAX8997_REG_MBCCTRL3,
272 MAX8997_REG_MBCCTRL4,
273 MAX8997_REG_MBCCTRL5,
274 MAX8997_REG_MBCCTRL6,
275 MAX8997_REG_OTPCGHCVS,
276 MAX8997_REG_SAFEOUTCTRL,
277 MAX8997_REG_LBCNFG1,
278 MAX8997_REG_LBCNFG2,
279 MAX8997_REG_BBCCTRL,
280
281 MAX8997_REG_FLASH1_CUR,
282 MAX8997_REG_FLASH2_CUR,
283 MAX8997_REG_MOVIE_CUR,
284 MAX8997_REG_GSMB_CUR,
285 MAX8997_REG_BOOST_CNTL,
286 MAX8997_REG_LEN_CNTL,
287 MAX8997_REG_FLASH_CNTL,
288 MAX8997_REG_WDT_CNTL,
289 MAX8997_REG_MAXFLASH1,
290 MAX8997_REG_MAXFLASH2,
291 MAX8997_REG_FLASHSTATUSMASK,
292
293 MAX8997_REG_GPIOCNTL1,
294 MAX8997_REG_GPIOCNTL2,
295 MAX8997_REG_GPIOCNTL3,
296 MAX8997_REG_GPIOCNTL4,
297 MAX8997_REG_GPIOCNTL5,
298 MAX8997_REG_GPIOCNTL6,
299 MAX8997_REG_GPIOCNTL7,
300 MAX8997_REG_GPIOCNTL8,
301 MAX8997_REG_GPIOCNTL9,
302 MAX8997_REG_GPIOCNTL10,
303 MAX8997_REG_GPIOCNTL11,
304 MAX8997_REG_GPIOCNTL12,
305
306 MAX8997_REG_LDO1CONFIG,
307 MAX8997_REG_LDO2CONFIG,
308 MAX8997_REG_LDO3CONFIG,
309 MAX8997_REG_LDO4CONFIG,
310 MAX8997_REG_LDO5CONFIG,
311 MAX8997_REG_LDO6CONFIG,
312 MAX8997_REG_LDO7CONFIG,
313 MAX8997_REG_LDO8CONFIG,
314 MAX8997_REG_LDO9CONFIG,
315 MAX8997_REG_LDO10CONFIG,
316 MAX8997_REG_LDO11CONFIG,
317 MAX8997_REG_LDO12CONFIG,
318 MAX8997_REG_LDO13CONFIG,
319 MAX8997_REG_LDO14CONFIG,
320 MAX8997_REG_LDO15CONFIG,
321 MAX8997_REG_LDO16CONFIG,
322 MAX8997_REG_LDO17CONFIG,
323 MAX8997_REG_LDO18CONFIG,
324 MAX8997_REG_LDO21CONFIG,
325
326 MAX8997_REG_DVSOKTIMER1,
327 MAX8997_REG_DVSOKTIMER2,
328 MAX8997_REG_DVSOKTIMER4,
329 MAX8997_REG_DVSOKTIMER5,
330};
331
332u8 max8997_dumpaddr_muic[] = {
333 MAX8997_MUIC_REG_INTMASK1,
334 MAX8997_MUIC_REG_INTMASK2,
335 MAX8997_MUIC_REG_INTMASK3,
336 MAX8997_MUIC_REG_CDETCTRL,
337 MAX8997_MUIC_REG_CONTROL1,
338 MAX8997_MUIC_REG_CONTROL2,
339 MAX8997_MUIC_REG_CONTROL3,
340};
341
342u8 max8997_dumpaddr_haptic[] = {
343 MAX8997_HAPTIC_REG_CONF1,
344 MAX8997_HAPTIC_REG_CONF2,
345 MAX8997_HAPTIC_REG_DRVCONF,
346 MAX8997_HAPTIC_REG_CYCLECONF1,
347 MAX8997_HAPTIC_REG_CYCLECONF2,
348 MAX8997_HAPTIC_REG_SIGCONF1,
349 MAX8997_HAPTIC_REG_SIGCONF2,
350 MAX8997_HAPTIC_REG_SIGCONF3,
351 MAX8997_HAPTIC_REG_SIGCONF4,
352 MAX8997_HAPTIC_REG_SIGDC1,
353 MAX8997_HAPTIC_REG_SIGDC2,
354 MAX8997_HAPTIC_REG_SIGPWMDC1,
355 MAX8997_HAPTIC_REG_SIGPWMDC2,
356 MAX8997_HAPTIC_REG_SIGPWMDC3,
357 MAX8997_HAPTIC_REG_SIGPWMDC4,
358};
359
360static int max8997_freeze(struct device *dev)
361{
362 struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
363 struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
364 int i;
365
366 for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_pmic); i++)
367 max8997_read_reg(i2c, max8997_dumpaddr_pmic[i],
368 &max8997->reg_dump[i]);
369
370 for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_muic); i++)
371 max8997_read_reg(i2c, max8997_dumpaddr_muic[i],
372 &max8997->reg_dump[i + MAX8997_REG_PMIC_END]);
373
374 for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_haptic); i++)
375 max8997_read_reg(i2c, max8997_dumpaddr_haptic[i],
376 &max8997->reg_dump[i + MAX8997_REG_PMIC_END +
377 MAX8997_MUIC_REG_END]);
378
379 return 0;
380}
381
382static int max8997_restore(struct device *dev)
383{
384 struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
385 struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
386 int i;
387
388 for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_pmic); i++)
389 max8997_write_reg(i2c, max8997_dumpaddr_pmic[i],
390 max8997->reg_dump[i]);
391
392 for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_muic); i++)
393 max8997_write_reg(i2c, max8997_dumpaddr_muic[i],
394 max8997->reg_dump[i + MAX8997_REG_PMIC_END]);
395
396 for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_haptic); i++)
397 max8997_write_reg(i2c, max8997_dumpaddr_haptic[i],
398 max8997->reg_dump[i + MAX8997_REG_PMIC_END +
399 MAX8997_MUIC_REG_END]);
400
401 return 0;
402}
403
MyungJoo Ham01fdaab2011-08-19 14:39:40 +0900404static int max8997_suspend(struct device *dev)
405{
406 struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
407 struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
408
409 if (device_may_wakeup(dev))
410 irq_set_irq_wake(max8997->irq, 1);
411 return 0;
412}
413
414static int max8997_resume(struct device *dev)
415{
416 struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
417 struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
418
419 if (device_may_wakeup(dev))
420 irq_set_irq_wake(max8997->irq, 0);
421 return max8997_irq_resume(max8997);
422}
423
MyungJoo Ham527e7e92011-03-04 15:50:26 +0900424const struct dev_pm_ops max8997_pm = {
MyungJoo Ham01fdaab2011-08-19 14:39:40 +0900425 .suspend = max8997_suspend,
426 .resume = max8997_resume,
MyungJoo Ham527e7e92011-03-04 15:50:26 +0900427 .freeze = max8997_freeze,
428 .restore = max8997_restore,
429};
430
431static struct i2c_driver max8997_i2c_driver = {
432 .driver = {
433 .name = "max8997",
434 .owner = THIS_MODULE,
435 .pm = &max8997_pm,
436 },
437 .probe = max8997_i2c_probe,
438 .remove = max8997_i2c_remove,
439 .id_table = max8997_i2c_id,
440};
441
442static int __init max8997_i2c_init(void)
443{
444 return i2c_add_driver(&max8997_i2c_driver);
445}
446/* init early so consumer devices can complete system boot */
447subsys_initcall(max8997_i2c_init);
448
449static void __exit max8997_i2c_exit(void)
450{
451 i2c_del_driver(&max8997_i2c_driver);
452}
453module_exit(max8997_i2c_exit);
454
455MODULE_DESCRIPTION("MAXIM 8997 multi-function core driver");
456MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>");
457MODULE_LICENSE("GPL");