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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/rtc.h>
29#include <linux/mfd/samsung/s2mpa01.h>
30#include <linux/mfd/samsung/s2mps11.h>
31#include <linux/mfd/samsung/s2mps14.h>
32#include <linux/mfd/samsung/s5m8763.h>
33#include <linux/mfd/samsung/s5m8767.h>
34#include <linux/regmap.h>
35
36static const struct mfd_cell s5m8751_devs[] = {
37 {
38 .name = "s5m8751-pmic",
39 }, {
40 .name = "s5m-charger",
41 }, {
42 .name = "s5m8751-codec",
43 },
44};
45
46static const struct mfd_cell s5m8763_devs[] = {
47 {
48 .name = "s5m8763-pmic",
49 }, {
50 .name = "s5m-rtc",
51 }, {
52 .name = "s5m-charger",
53 },
54};
55
56static const struct mfd_cell s5m8767_devs[] = {
57 {
58 .name = "s5m8767-pmic",
59 }, {
60 .name = "s5m-rtc",
61 }, {
62 .name = "s5m8767-clk",
63 .of_compatible = "samsung,s5m8767-clk",
64 }
65};
66
67static const struct mfd_cell s2mps11_devs[] = {
68 {
69 .name = "s2mps11-pmic",
70 }, {
71 .name = "s2mps11-clk",
72 .of_compatible = "samsung,s2mps11-clk",
73 }
74};
75
76static const struct mfd_cell s2mps14_devs[] = {
77 {
78 .name = "s2mps14-pmic",
79 }, {
80 .name = "s2mps14-rtc",
81 }, {
82 .name = "s2mps14-clk",
83 .of_compatible = "samsung,s2mps14-clk",
84 }
85};
86
87static const struct mfd_cell s2mpa01_devs[] = {
88 {
89 .name = "s2mpa01-pmic",
90 },
91};
92
93#ifdef CONFIG_OF
94static struct of_device_id sec_dt_match[] = {
95 { .compatible = "samsung,s5m8767-pmic",
96 .data = (void *)S5M8767X,
97 }, {
98 .compatible = "samsung,s2mps11-pmic",
99 .data = (void *)S2MPS11X,
100 }, {
101 .compatible = "samsung,s2mps14-pmic",
102 .data = (void *)S2MPS14X,
103 }, {
104 .compatible = "samsung,s2mpa01-pmic",
105 .data = (void *)S2MPA01,
106 }, {
107 /* Sentinel */
108 },
109};
110#endif
111
112static bool s2mpa01_volatile(struct device *dev, unsigned int reg)
113{
114 switch (reg) {
115 case S2MPA01_REG_INT1M:
116 case S2MPA01_REG_INT2M:
117 case S2MPA01_REG_INT3M:
118 return false;
119 default:
120 return true;
121 }
122}
123
124static bool s2mps11_volatile(struct device *dev, unsigned int reg)
125{
126 switch (reg) {
127 case S2MPS11_REG_INT1M:
128 case S2MPS11_REG_INT2M:
129 case S2MPS11_REG_INT3M:
130 return false;
131 default:
132 return true;
133 }
134}
135
136static bool s5m8763_volatile(struct device *dev, unsigned int reg)
137{
138 switch (reg) {
139 case S5M8763_REG_IRQM1:
140 case S5M8763_REG_IRQM2:
141 case S5M8763_REG_IRQM3:
142 case S5M8763_REG_IRQM4:
143 return false;
144 default:
145 return true;
146 }
147}
148
149static const struct regmap_config sec_regmap_config = {
150 .reg_bits = 8,
151 .val_bits = 8,
152};
153
154static const struct regmap_config s2mpa01_regmap_config = {
155 .reg_bits = 8,
156 .val_bits = 8,
157
158 .max_register = S2MPA01_REG_LDO_OVCB4,
159 .volatile_reg = s2mpa01_volatile,
160 .cache_type = REGCACHE_FLAT,
161};
162
163static const struct regmap_config s2mps11_regmap_config = {
164 .reg_bits = 8,
165 .val_bits = 8,
166
167 .max_register = S2MPS11_REG_L38CTRL,
168 .volatile_reg = s2mps11_volatile,
169 .cache_type = REGCACHE_FLAT,
170};
171
172static const struct regmap_config s2mps14_regmap_config = {
173 .reg_bits = 8,
174 .val_bits = 8,
175
176 .max_register = S2MPS14_REG_LDODSCH3,
177 .volatile_reg = s2mps11_volatile,
178 .cache_type = REGCACHE_FLAT,
179};
180
181static const struct regmap_config s5m8763_regmap_config = {
182 .reg_bits = 8,
183 .val_bits = 8,
184
185 .max_register = S5M8763_REG_LBCNFG2,
186 .volatile_reg = s5m8763_volatile,
187 .cache_type = REGCACHE_FLAT,
188};
189
190static const struct regmap_config s5m8767_regmap_config = {
191 .reg_bits = 8,
192 .val_bits = 8,
193
194 .max_register = S5M8767_REG_LDO28CTRL,
195 .volatile_reg = s2mps11_volatile,
196 .cache_type = REGCACHE_FLAT,
197};
198
199static const struct regmap_config s5m_rtc_regmap_config = {
200 .reg_bits = 8,
201 .val_bits = 8,
202
203 .max_register = SEC_RTC_REG_MAX,
204};
205
206static const struct regmap_config s2mps14_rtc_regmap_config = {
207 .reg_bits = 8,
208 .val_bits = 8,
209
210 .max_register = S2MPS_RTC_REG_MAX,
211};
212
213#ifdef CONFIG_OF
214/*
215 * Only the common platform data elements for s5m8767 are parsed here from the
216 * device tree. Other sub-modules of s5m8767 such as pmic, rtc , charger and
217 * others have to parse their own platform data elements from device tree.
218 *
219 * The s5m8767 platform data structure is instantiated here and the drivers for
220 * the sub-modules need not instantiate another instance while parsing their
221 * platform data.
222 */
223static struct sec_platform_data *sec_pmic_i2c_parse_dt_pdata(
224 struct device *dev)
225{
226 struct sec_platform_data *pd;
227
228 pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);
229 if (!pd) {
230 dev_err(dev, "could not allocate memory for pdata\n");
231 return ERR_PTR(-ENOMEM);
232 }
233
234 /*
235 * ToDo: the 'wakeup' member in the platform data is more of a linux
236 * specfic information. Hence, there is no binding for that yet and
237 * not parsed here.
238 */
239
240 return pd;
241}
242#else
243static struct sec_platform_data *sec_pmic_i2c_parse_dt_pdata(
244 struct device *dev)
245{
246 return NULL;
247}
248#endif
249
250static inline unsigned long sec_i2c_get_driver_data(struct i2c_client *i2c,
251 const struct i2c_device_id *id)
252{
253#ifdef CONFIG_OF
254 if (i2c->dev.of_node) {
255 const struct of_device_id *match;
256 match = of_match_node(sec_dt_match, i2c->dev.of_node);
257 return (unsigned long)match->data;
258 }
259#endif
260 return id->driver_data;
261}
262
263static int sec_pmic_probe(struct i2c_client *i2c,
264 const struct i2c_device_id *id)
265{
266 struct sec_platform_data *pdata = dev_get_platdata(&i2c->dev);
267 const struct regmap_config *regmap, *regmap_rtc;
268 struct sec_pmic_dev *sec_pmic;
269 int ret;
270
271 sec_pmic = devm_kzalloc(&i2c->dev, sizeof(struct sec_pmic_dev),
272 GFP_KERNEL);
273 if (sec_pmic == NULL)
274 return -ENOMEM;
275
276 i2c_set_clientdata(i2c, sec_pmic);
277 sec_pmic->dev = &i2c->dev;
278 sec_pmic->i2c = i2c;
279 sec_pmic->irq = i2c->irq;
280 sec_pmic->type = sec_i2c_get_driver_data(i2c, id);
281
282 if (sec_pmic->dev->of_node) {
283 pdata = sec_pmic_i2c_parse_dt_pdata(sec_pmic->dev);
284 if (IS_ERR(pdata)) {
285 ret = PTR_ERR(pdata);
286 return ret;
287 }
288 pdata->device_type = sec_pmic->type;
289 }
290 if (pdata) {
291 sec_pmic->device_type = pdata->device_type;
292 sec_pmic->ono = pdata->ono;
293 sec_pmic->irq_base = pdata->irq_base;
294 sec_pmic->wakeup = pdata->wakeup;
295 sec_pmic->pdata = pdata;
296 }
297
298 switch (sec_pmic->device_type) {
299 case S2MPA01:
300 regmap = &s2mpa01_regmap_config;
301 /*
302 * The rtc-s5m driver does not support S2MPA01 and there
303 * is no mfd_cell for S2MPA01 RTC device.
304 * However we must pass something to devm_regmap_init_i2c()
305 * so use S5M-like regmap config even though it wouldn't work.
306 */
307 regmap_rtc = &s5m_rtc_regmap_config;
308 break;
309 case S2MPS11X:
310 regmap = &s2mps11_regmap_config;
311 /*
312 * The rtc-s5m driver does not support S2MPS11 and there
313 * is no mfd_cell for S2MPS11 RTC device.
314 * However we must pass something to devm_regmap_init_i2c()
315 * so use S5M-like regmap config even though it wouldn't work.
316 */
317 regmap_rtc = &s5m_rtc_regmap_config;
318 break;
319 case S2MPS14X:
320 regmap = &s2mps14_regmap_config;
321 regmap_rtc = &s2mps14_rtc_regmap_config;
322 break;
323 case S5M8763X:
324 regmap = &s5m8763_regmap_config;
325 regmap_rtc = &s5m_rtc_regmap_config;
326 break;
327 case S5M8767X:
328 regmap = &s5m8767_regmap_config;
329 regmap_rtc = &s5m_rtc_regmap_config;
330 break;
331 default:
332 regmap = &sec_regmap_config;
333 regmap_rtc = &s5m_rtc_regmap_config;
334 break;
335 }
336
337 sec_pmic->regmap_pmic = devm_regmap_init_i2c(i2c, regmap);
338 if (IS_ERR(sec_pmic->regmap_pmic)) {
339 ret = PTR_ERR(sec_pmic->regmap_pmic);
340 dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
341 ret);
342 return ret;
343 }
344
345 sec_pmic->rtc = i2c_new_dummy(i2c->adapter, RTC_I2C_ADDR);
346 if (!sec_pmic->rtc) {
347 dev_err(&i2c->dev, "Failed to allocate I2C for RTC\n");
348 return -ENODEV;
349 }
350 i2c_set_clientdata(sec_pmic->rtc, sec_pmic);
351
352 sec_pmic->regmap_rtc = devm_regmap_init_i2c(sec_pmic->rtc, regmap_rtc);
353 if (IS_ERR(sec_pmic->regmap_rtc)) {
354 ret = PTR_ERR(sec_pmic->regmap_rtc);
355 dev_err(&i2c->dev, "Failed to allocate RTC register map: %d\n",
356 ret);
357 goto err_regmap_rtc;
358 }
359
360 if (pdata && pdata->cfg_pmic_irq)
361 pdata->cfg_pmic_irq();
362
363 sec_irq_init(sec_pmic);
364
365 pm_runtime_set_active(sec_pmic->dev);
366
367 switch (sec_pmic->device_type) {
368 case S5M8751X:
369 ret = mfd_add_devices(sec_pmic->dev, -1, s5m8751_devs,
370 ARRAY_SIZE(s5m8751_devs), NULL, 0, NULL);
371 break;
372 case S5M8763X:
373 ret = mfd_add_devices(sec_pmic->dev, -1, s5m8763_devs,
374 ARRAY_SIZE(s5m8763_devs), NULL, 0, NULL);
375 break;
376 case S5M8767X:
377 ret = mfd_add_devices(sec_pmic->dev, -1, s5m8767_devs,
378 ARRAY_SIZE(s5m8767_devs), NULL, 0, NULL);
379 break;
380 case S2MPA01:
381 ret = mfd_add_devices(sec_pmic->dev, -1, s2mpa01_devs,
382 ARRAY_SIZE(s2mpa01_devs), NULL, 0, NULL);
383 break;
384 case S2MPS11X:
385 ret = mfd_add_devices(sec_pmic->dev, -1, s2mps11_devs,
386 ARRAY_SIZE(s2mps11_devs), NULL, 0, NULL);
387 break;
388 case S2MPS14X:
389 ret = mfd_add_devices(sec_pmic->dev, -1, s2mps14_devs,
390 ARRAY_SIZE(s2mps14_devs), NULL, 0, NULL);
391 break;
392 default:
393 /* If this happens the probe function is problem */
394 BUG();
395 }
396
397 if (ret)
398 goto err_mfd;
399
400 device_init_wakeup(sec_pmic->dev, sec_pmic->wakeup);
401
402 return ret;
403
404err_mfd:
405 sec_irq_exit(sec_pmic);
406err_regmap_rtc:
407 i2c_unregister_device(sec_pmic->rtc);
408 return ret;
409}
410
411static int sec_pmic_remove(struct i2c_client *i2c)
412{
413 struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c);
414
415 mfd_remove_devices(sec_pmic->dev);
416 sec_irq_exit(sec_pmic);
417 i2c_unregister_device(sec_pmic->rtc);
418 return 0;
419}
420
421#ifdef CONFIG_PM_SLEEP
422static int sec_pmic_suspend(struct device *dev)
423{
424 struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
425 struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c);
426
427 if (device_may_wakeup(dev)) {
428 enable_irq_wake(sec_pmic->irq);
429 /*
430 * PMIC IRQ must be disabled during suspend for RTC alarm
431 * to work properly.
432 * When device is woken up from suspend by RTC Alarm, an
433 * interrupt occurs before resuming I2C bus controller.
434 * The interrupt is handled by regmap_irq_thread which tries
435 * to read RTC registers. This read fails (I2C is still
436 * suspended) and RTC Alarm interrupt is disabled.
437 */
438 disable_irq(sec_pmic->irq);
439 }
440
441 return 0;
442}
443
444static int sec_pmic_resume(struct device *dev)
445{
446 struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
447 struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c);
448
449 if (device_may_wakeup(dev)) {
450 disable_irq_wake(sec_pmic->irq);
451 enable_irq(sec_pmic->irq);
452 }
453
454 return 0;
455}
456#endif /* CONFIG_PM_SLEEP */
457
458static SIMPLE_DEV_PM_OPS(sec_pmic_pm_ops, sec_pmic_suspend, sec_pmic_resume);
459
460static const struct i2c_device_id sec_pmic_id[] = {
461 { "sec_pmic", 0 },
462 { }
463};
464MODULE_DEVICE_TABLE(i2c, sec_pmic_id);
465
466static struct i2c_driver sec_pmic_driver = {
467 .driver = {
468 .name = "sec_pmic",
469 .owner = THIS_MODULE,
470 .pm = &sec_pmic_pm_ops,
471 .of_match_table = of_match_ptr(sec_dt_match),
472 },
473 .probe = sec_pmic_probe,
474 .remove = sec_pmic_remove,
475 .id_table = sec_pmic_id,
476};
477
478static int __init sec_pmic_init(void)
479{
480 return i2c_add_driver(&sec_pmic_driver);
481}
482
483subsys_initcall(sec_pmic_init);
484
485static void __exit sec_pmic_exit(void)
486{
487 i2c_del_driver(&sec_pmic_driver);
488}
489module_exit(sec_pmic_exit);
490
491MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
492MODULE_DESCRIPTION("Core support for the S5M MFD");
493MODULE_LICENSE("GPL");