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1/*
2 * sec-core.c
3 *
4 * Copyright (c) 2012 Samsung Electronics Co., Ltd
5 * http://www.samsung.com
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
11 *
12 */
13
14#include <linux/module.h>
15#include <linux/moduleparam.h>
16#include <linux/init.h>
17#include <linux/err.h>
18#include <linux/slab.h>
19#include <linux/i2c.h>
20#include <linux/of.h>
21#include <linux/of_irq.h>
22#include <linux/interrupt.h>
23#include <linux/pm_runtime.h>
24#include <linux/mutex.h>
25#include <linux/mfd/core.h>
26#include <linux/mfd/samsung/core.h>
27#include <linux/mfd/samsung/irq.h>
28#include <linux/mfd/samsung/s2mpa01.h>
29#include <linux/mfd/samsung/s2mps11.h>
30#include <linux/mfd/samsung/s2mps13.h>
31#include <linux/mfd/samsung/s2mps14.h>
32#include <linux/mfd/samsung/s2mps15.h>
33#include <linux/mfd/samsung/s2mpu02.h>
34#include <linux/mfd/samsung/s5m8763.h>
35#include <linux/mfd/samsung/s5m8767.h>
36#include <linux/regmap.h>
37
38static const struct mfd_cell s5m8751_devs[] = {
39 {
40 .name = "s5m8751-pmic",
41 }, {
42 .name = "s5m-charger",
43 }, {
44 .name = "s5m8751-codec",
45 },
46};
47
48static const struct mfd_cell s5m8763_devs[] = {
49 {
50 .name = "s5m8763-pmic",
51 }, {
52 .name = "s5m-rtc",
53 }, {
54 .name = "s5m-charger",
55 },
56};
57
58static const struct mfd_cell s5m8767_devs[] = {
59 {
60 .name = "s5m8767-pmic",
61 }, {
62 .name = "s5m-rtc",
63 }, {
64 .name = "s5m8767-clk",
65 .of_compatible = "samsung,s5m8767-clk",
66 }
67};
68
69static const struct mfd_cell s2mps11_devs[] = {
70 {
71 .name = "s2mps11-regulator",
72 }, {
73 .name = "s2mps14-rtc",
74 }, {
75 .name = "s2mps11-clk",
76 .of_compatible = "samsung,s2mps11-clk",
77 }
78};
79
80static const struct mfd_cell s2mps13_devs[] = {
81 { .name = "s2mps13-regulator", },
82 { .name = "s2mps13-rtc", },
83 {
84 .name = "s2mps13-clk",
85 .of_compatible = "samsung,s2mps13-clk",
86 },
87};
88
89static const struct mfd_cell s2mps14_devs[] = {
90 {
91 .name = "s2mps14-regulator",
92 }, {
93 .name = "s2mps14-rtc",
94 }, {
95 .name = "s2mps14-clk",
96 .of_compatible = "samsung,s2mps14-clk",
97 }
98};
99
100static const struct mfd_cell s2mps15_devs[] = {
101 {
102 .name = "s2mps15-regulator",
103 }, {
104 .name = "s2mps15-rtc",
105 }, {
106 .name = "s2mps13-clk",
107 .of_compatible = "samsung,s2mps13-clk",
108 },
109};
110
111static const struct mfd_cell s2mpa01_devs[] = {
112 {
113 .name = "s2mpa01-pmic",
114 },
115};
116
117static const struct mfd_cell s2mpu02_devs[] = {
118 {
119 .name = "s2mpu02-regulator",
120 },
121};
122
123#ifdef CONFIG_OF
124static const struct of_device_id sec_dt_match[] = {
125 { .compatible = "samsung,s5m8767-pmic",
126 .data = (void *)S5M8767X,
127 }, {
128 .compatible = "samsung,s2mps11-pmic",
129 .data = (void *)S2MPS11X,
130 }, {
131 .compatible = "samsung,s2mps13-pmic",
132 .data = (void *)S2MPS13X,
133 }, {
134 .compatible = "samsung,s2mps14-pmic",
135 .data = (void *)S2MPS14X,
136 }, {
137 .compatible = "samsung,s2mps15-pmic",
138 .data = (void *)S2MPS15X,
139 }, {
140 .compatible = "samsung,s2mpa01-pmic",
141 .data = (void *)S2MPA01,
142 }, {
143 .compatible = "samsung,s2mpu02-pmic",
144 .data = (void *)S2MPU02,
145 }, {
146 /* Sentinel */
147 },
148};
149#endif
150
151static bool s2mpa01_volatile(struct device *dev, unsigned int reg)
152{
153 switch (reg) {
154 case S2MPA01_REG_INT1M:
155 case S2MPA01_REG_INT2M:
156 case S2MPA01_REG_INT3M:
157 return false;
158 default:
159 return true;
160 }
161}
162
163static bool s2mps11_volatile(struct device *dev, unsigned int reg)
164{
165 switch (reg) {
166 case S2MPS11_REG_INT1M:
167 case S2MPS11_REG_INT2M:
168 case S2MPS11_REG_INT3M:
169 return false;
170 default:
171 return true;
172 }
173}
174
175static bool s2mpu02_volatile(struct device *dev, unsigned int reg)
176{
177 switch (reg) {
178 case S2MPU02_REG_INT1M:
179 case S2MPU02_REG_INT2M:
180 case S2MPU02_REG_INT3M:
181 return false;
182 default:
183 return true;
184 }
185}
186
187static bool s5m8763_volatile(struct device *dev, unsigned int reg)
188{
189 switch (reg) {
190 case S5M8763_REG_IRQM1:
191 case S5M8763_REG_IRQM2:
192 case S5M8763_REG_IRQM3:
193 case S5M8763_REG_IRQM4:
194 return false;
195 default:
196 return true;
197 }
198}
199
200static const struct regmap_config sec_regmap_config = {
201 .reg_bits = 8,
202 .val_bits = 8,
203};
204
205static const struct regmap_config s2mpa01_regmap_config = {
206 .reg_bits = 8,
207 .val_bits = 8,
208
209 .max_register = S2MPA01_REG_LDO_OVCB4,
210 .volatile_reg = s2mpa01_volatile,
211 .cache_type = REGCACHE_FLAT,
212};
213
214static const struct regmap_config s2mps11_regmap_config = {
215 .reg_bits = 8,
216 .val_bits = 8,
217
218 .max_register = S2MPS11_REG_L38CTRL,
219 .volatile_reg = s2mps11_volatile,
220 .cache_type = REGCACHE_FLAT,
221};
222
223static const struct regmap_config s2mps13_regmap_config = {
224 .reg_bits = 8,
225 .val_bits = 8,
226
227 .max_register = S2MPS13_REG_LDODSCH5,
228 .volatile_reg = s2mps11_volatile,
229 .cache_type = REGCACHE_FLAT,
230};
231
232static const struct regmap_config s2mps14_regmap_config = {
233 .reg_bits = 8,
234 .val_bits = 8,
235
236 .max_register = S2MPS14_REG_LDODSCH3,
237 .volatile_reg = s2mps11_volatile,
238 .cache_type = REGCACHE_FLAT,
239};
240
241static const struct regmap_config s2mps15_regmap_config = {
242 .reg_bits = 8,
243 .val_bits = 8,
244
245 .max_register = S2MPS15_REG_LDODSCH4,
246 .volatile_reg = s2mps11_volatile,
247 .cache_type = REGCACHE_FLAT,
248};
249
250static const struct regmap_config s2mpu02_regmap_config = {
251 .reg_bits = 8,
252 .val_bits = 8,
253
254 .max_register = S2MPU02_REG_DVSDATA,
255 .volatile_reg = s2mpu02_volatile,
256 .cache_type = REGCACHE_FLAT,
257};
258
259static const struct regmap_config s5m8763_regmap_config = {
260 .reg_bits = 8,
261 .val_bits = 8,
262
263 .max_register = S5M8763_REG_LBCNFG2,
264 .volatile_reg = s5m8763_volatile,
265 .cache_type = REGCACHE_FLAT,
266};
267
268static const struct regmap_config s5m8767_regmap_config = {
269 .reg_bits = 8,
270 .val_bits = 8,
271
272 .max_register = S5M8767_REG_LDO28CTRL,
273 .volatile_reg = s2mps11_volatile,
274 .cache_type = REGCACHE_FLAT,
275};
276
277static void sec_pmic_dump_rev(struct sec_pmic_dev *sec_pmic)
278{
279 unsigned int val;
280
281 /* For each device type, the REG_ID is always the first register */
282 if (!regmap_read(sec_pmic->regmap_pmic, S2MPS11_REG_ID, &val))
283 dev_dbg(sec_pmic->dev, "Revision: 0x%x\n", val);
284}
285
286static void sec_pmic_configure(struct sec_pmic_dev *sec_pmic)
287{
288 int err;
289
290 if (sec_pmic->device_type != S2MPS13X)
291 return;
292
293 if (sec_pmic->pdata->disable_wrstbi) {
294 /*
295 * If WRSTBI pin is pulled down this feature must be disabled
296 * because each Suspend to RAM will trigger buck voltage reset
297 * to default values.
298 */
299 err = regmap_update_bits(sec_pmic->regmap_pmic,
300 S2MPS13_REG_WRSTBI,
301 S2MPS13_REG_WRSTBI_MASK, 0x0);
302 if (err)
303 dev_warn(sec_pmic->dev,
304 "Cannot initialize WRSTBI config: %d\n",
305 err);
306 }
307}
308
309#ifdef CONFIG_OF
310/*
311 * Only the common platform data elements for s5m8767 are parsed here from the
312 * device tree. Other sub-modules of s5m8767 such as pmic, rtc , charger and
313 * others have to parse their own platform data elements from device tree.
314 *
315 * The s5m8767 platform data structure is instantiated here and the drivers for
316 * the sub-modules need not instantiate another instance while parsing their
317 * platform data.
318 */
319static struct sec_platform_data *sec_pmic_i2c_parse_dt_pdata(
320 struct device *dev)
321{
322 struct sec_platform_data *pd;
323
324 pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);
325 if (!pd)
326 return ERR_PTR(-ENOMEM);
327
328 /*
329 * ToDo: the 'wakeup' member in the platform data is more of a linux
330 * specfic information. Hence, there is no binding for that yet and
331 * not parsed here.
332 */
333
334 pd->manual_poweroff = of_property_read_bool(dev->of_node,
335 "samsung,s2mps11-acokb-ground");
336 pd->disable_wrstbi = of_property_read_bool(dev->of_node,
337 "samsung,s2mps11-wrstbi-ground");
338 return pd;
339}
340#else
341static struct sec_platform_data *sec_pmic_i2c_parse_dt_pdata(
342 struct device *dev)
343{
344 return NULL;
345}
346#endif
347
348static inline unsigned long sec_i2c_get_driver_data(struct i2c_client *i2c,
349 const struct i2c_device_id *id)
350{
351#ifdef CONFIG_OF
352 if (i2c->dev.of_node) {
353 const struct of_device_id *match;
354
355 match = of_match_node(sec_dt_match, i2c->dev.of_node);
356 return (unsigned long)match->data;
357 }
358#endif
359 return id->driver_data;
360}
361
362static int sec_pmic_probe(struct i2c_client *i2c,
363 const struct i2c_device_id *id)
364{
365 struct sec_platform_data *pdata = dev_get_platdata(&i2c->dev);
366 const struct regmap_config *regmap;
367 const struct mfd_cell *sec_devs;
368 struct sec_pmic_dev *sec_pmic;
369 unsigned long device_type;
370 int ret, num_sec_devs;
371
372 sec_pmic = devm_kzalloc(&i2c->dev, sizeof(struct sec_pmic_dev),
373 GFP_KERNEL);
374 if (sec_pmic == NULL)
375 return -ENOMEM;
376
377 i2c_set_clientdata(i2c, sec_pmic);
378 sec_pmic->dev = &i2c->dev;
379 sec_pmic->i2c = i2c;
380 sec_pmic->irq = i2c->irq;
381 device_type = sec_i2c_get_driver_data(i2c, id);
382
383 if (sec_pmic->dev->of_node) {
384 pdata = sec_pmic_i2c_parse_dt_pdata(sec_pmic->dev);
385 if (IS_ERR(pdata)) {
386 ret = PTR_ERR(pdata);
387 return ret;
388 }
389 pdata->device_type = device_type;
390 }
391 if (pdata) {
392 sec_pmic->device_type = pdata->device_type;
393 sec_pmic->irq_base = pdata->irq_base;
394 sec_pmic->wakeup = pdata->wakeup;
395 sec_pmic->pdata = pdata;
396 }
397
398 switch (sec_pmic->device_type) {
399 case S2MPA01:
400 regmap = &s2mpa01_regmap_config;
401 break;
402 case S2MPS11X:
403 regmap = &s2mps11_regmap_config;
404 break;
405 case S2MPS13X:
406 regmap = &s2mps13_regmap_config;
407 break;
408 case S2MPS14X:
409 regmap = &s2mps14_regmap_config;
410 break;
411 case S2MPS15X:
412 regmap = &s2mps15_regmap_config;
413 break;
414 case S5M8763X:
415 regmap = &s5m8763_regmap_config;
416 break;
417 case S5M8767X:
418 regmap = &s5m8767_regmap_config;
419 break;
420 case S2MPU02:
421 regmap = &s2mpu02_regmap_config;
422 break;
423 default:
424 regmap = &sec_regmap_config;
425 break;
426 }
427
428 sec_pmic->regmap_pmic = devm_regmap_init_i2c(i2c, regmap);
429 if (IS_ERR(sec_pmic->regmap_pmic)) {
430 ret = PTR_ERR(sec_pmic->regmap_pmic);
431 dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
432 ret);
433 return ret;
434 }
435
436 if (pdata && pdata->cfg_pmic_irq)
437 pdata->cfg_pmic_irq();
438
439 sec_irq_init(sec_pmic);
440
441 pm_runtime_set_active(sec_pmic->dev);
442
443 switch (sec_pmic->device_type) {
444 case S5M8751X:
445 sec_devs = s5m8751_devs;
446 num_sec_devs = ARRAY_SIZE(s5m8751_devs);
447 break;
448 case S5M8763X:
449 sec_devs = s5m8763_devs;
450 num_sec_devs = ARRAY_SIZE(s5m8763_devs);
451 break;
452 case S5M8767X:
453 sec_devs = s5m8767_devs;
454 num_sec_devs = ARRAY_SIZE(s5m8767_devs);
455 break;
456 case S2MPA01:
457 sec_devs = s2mpa01_devs;
458 num_sec_devs = ARRAY_SIZE(s2mpa01_devs);
459 break;
460 case S2MPS11X:
461 sec_devs = s2mps11_devs;
462 num_sec_devs = ARRAY_SIZE(s2mps11_devs);
463 break;
464 case S2MPS13X:
465 sec_devs = s2mps13_devs;
466 num_sec_devs = ARRAY_SIZE(s2mps13_devs);
467 break;
468 case S2MPS14X:
469 sec_devs = s2mps14_devs;
470 num_sec_devs = ARRAY_SIZE(s2mps14_devs);
471 break;
472 case S2MPS15X:
473 sec_devs = s2mps15_devs;
474 num_sec_devs = ARRAY_SIZE(s2mps15_devs);
475 break;
476 case S2MPU02:
477 sec_devs = s2mpu02_devs;
478 num_sec_devs = ARRAY_SIZE(s2mpu02_devs);
479 break;
480 default:
481 /* If this happens the probe function is problem */
482 BUG();
483 }
484 ret = devm_mfd_add_devices(sec_pmic->dev, -1, sec_devs, num_sec_devs,
485 NULL, 0, NULL);
486 if (ret)
487 return ret;
488
489 device_init_wakeup(sec_pmic->dev, sec_pmic->wakeup);
490 sec_pmic_configure(sec_pmic);
491 sec_pmic_dump_rev(sec_pmic);
492
493 return ret;
494}
495
496static void sec_pmic_shutdown(struct i2c_client *i2c)
497{
498 struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c);
499 unsigned int reg, mask;
500
501 if (!sec_pmic->pdata->manual_poweroff)
502 return;
503
504 switch (sec_pmic->device_type) {
505 case S2MPS11X:
506 reg = S2MPS11_REG_CTRL1;
507 mask = S2MPS11_CTRL1_PWRHOLD_MASK;
508 break;
509 default:
510 /*
511 * Currently only one board with S2MPS11 needs this, so just
512 * ignore the rest.
513 */
514 dev_warn(sec_pmic->dev,
515 "Unsupported device %lu for manual power off\n",
516 sec_pmic->device_type);
517 return;
518 }
519
520 regmap_update_bits(sec_pmic->regmap_pmic, reg, mask, 0);
521}
522
523#ifdef CONFIG_PM_SLEEP
524static int sec_pmic_suspend(struct device *dev)
525{
526 struct i2c_client *i2c = to_i2c_client(dev);
527 struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c);
528
529 if (device_may_wakeup(dev))
530 enable_irq_wake(sec_pmic->irq);
531 /*
532 * PMIC IRQ must be disabled during suspend for RTC alarm
533 * to work properly.
534 * When device is woken up from suspend, an
535 * interrupt occurs before resuming I2C bus controller.
536 * The interrupt is handled by regmap_irq_thread which tries
537 * to read RTC registers. This read fails (I2C is still
538 * suspended) and RTC Alarm interrupt is disabled.
539 */
540 disable_irq(sec_pmic->irq);
541
542 return 0;
543}
544
545static int sec_pmic_resume(struct device *dev)
546{
547 struct i2c_client *i2c = to_i2c_client(dev);
548 struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c);
549
550 if (device_may_wakeup(dev))
551 disable_irq_wake(sec_pmic->irq);
552 enable_irq(sec_pmic->irq);
553
554 return 0;
555}
556#endif /* CONFIG_PM_SLEEP */
557
558static SIMPLE_DEV_PM_OPS(sec_pmic_pm_ops, sec_pmic_suspend, sec_pmic_resume);
559
560static const struct i2c_device_id sec_pmic_id[] = {
561 { "sec_pmic", 0 },
562 { }
563};
564MODULE_DEVICE_TABLE(i2c, sec_pmic_id);
565
566static struct i2c_driver sec_pmic_driver = {
567 .driver = {
568 .name = "sec_pmic",
569 .pm = &sec_pmic_pm_ops,
570 .of_match_table = of_match_ptr(sec_dt_match),
571 },
572 .probe = sec_pmic_probe,
573 .shutdown = sec_pmic_shutdown,
574 .id_table = sec_pmic_id,
575};
576
577static int __init sec_pmic_init(void)
578{
579 return i2c_add_driver(&sec_pmic_driver);
580}
581
582subsys_initcall(sec_pmic_init);
583
584static void __exit sec_pmic_exit(void)
585{
586 i2c_del_driver(&sec_pmic_driver);
587}
588module_exit(sec_pmic_exit);
589
590MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
591MODULE_DESCRIPTION("Core support for the S5M MFD");
592MODULE_LICENSE("GPL");