mt6360_charger.c

  1// SPDX-License-Identifier: GPL-2.0
  2/*
  3 * Copyright (c) 2021 MediaTek Inc.
  4 */
  5
  6#include <linux/devm-helpers.h>
  7#include <linux/init.h>
  8#include <linux/interrupt.h>
  9#include <linux/kernel.h>
 10#include <linux/linear_range.h>
 11#include <linux/module.h>
 12#include <linux/of.h>
 13#include <linux/platform_device.h>
 14#include <linux/power_supply.h>
 15#include <linux/property.h>
 16#include <linux/regmap.h>
 17#include <linux/regulator/driver.h>
 18
 19#define MT6360_PMU_CHG_CTRL1	0x311
 20#define MT6360_PMU_CHG_CTRL2	0x312
 21#define MT6360_PMU_CHG_CTRL3	0x313
 22#define MT6360_PMU_CHG_CTRL4	0x314
 23#define MT6360_PMU_CHG_CTRL5	0x315
 24#define MT6360_PMU_CHG_CTRL6	0x316
 25#define MT6360_PMU_CHG_CTRL7	0x317
 26#define MT6360_PMU_CHG_CTRL8	0x318
 27#define MT6360_PMU_CHG_CTRL9	0x319
 28#define MT6360_PMU_CHG_CTRL10	0x31A
 29#define MT6360_PMU_DEVICE_TYPE	0x322
 30#define MT6360_PMU_USB_STATUS1	0x327
 31#define MT6360_PMU_CHG_STAT	0x34A
 32#define MT6360_PMU_CHG_CTRL19	0x361
 33#define MT6360_PMU_FOD_STAT	0x3E7
 34
 35/* MT6360_PMU_CHG_CTRL1 */
 36#define MT6360_FSLP_SHFT	(3)
 37#define MT6360_FSLP_MASK	BIT(MT6360_FSLP_SHFT)
 38#define MT6360_OPA_MODE_SHFT	(0)
 39#define MT6360_OPA_MODE_MASK	BIT(MT6360_OPA_MODE_SHFT)
 40/* MT6360_PMU_CHG_CTRL2 */
 41#define MT6360_IINLMTSEL_SHFT	(2)
 42#define MT6360_IINLMTSEL_MASK	GENMASK(3, 2)
 43/* MT6360_PMU_CHG_CTRL3 */
 44#define MT6360_IAICR_SHFT	(2)
 45#define MT6360_IAICR_MASK	GENMASK(7, 2)
 46#define MT6360_ILIM_EN_MASK	BIT(0)
 47/* MT6360_PMU_CHG_CTRL4 */
 48#define MT6360_VOREG_SHFT	(1)
 49#define MT6360_VOREG_MASK	GENMASK(7, 1)
 50/* MT6360_PMU_CHG_CTRL5 */
 51#define MT6360_VOBST_MASK	GENMASK(7, 2)
 52/* MT6360_PMU_CHG_CTRL6 */
 53#define MT6360_VMIVR_SHFT      (1)
 54#define MT6360_VMIVR_MASK      GENMASK(7, 1)
 55/* MT6360_PMU_CHG_CTRL7 */
 56#define MT6360_ICHG_SHFT	(2)
 57#define MT6360_ICHG_MASK	GENMASK(7, 2)
 58/* MT6360_PMU_CHG_CTRL8 */
 59#define MT6360_IPREC_SHFT	(0)
 60#define MT6360_IPREC_MASK	GENMASK(3, 0)
 61/* MT6360_PMU_CHG_CTRL9 */
 62#define MT6360_IEOC_SHFT	(4)
 63#define MT6360_IEOC_MASK	GENMASK(7, 4)
 64/* MT6360_PMU_CHG_CTRL10 */
 65#define MT6360_OTG_OC_MASK	GENMASK(3, 0)
 66/* MT6360_PMU_DEVICE_TYPE */
 67#define MT6360_USBCHGEN_MASK	BIT(7)
 68/* MT6360_PMU_USB_STATUS1 */
 69#define MT6360_USB_STATUS_SHFT	(4)
 70#define MT6360_USB_STATUS_MASK	GENMASK(6, 4)
 71/* MT6360_PMU_CHG_STAT */
 72#define MT6360_CHG_STAT_SHFT	(6)
 73#define MT6360_CHG_STAT_MASK	GENMASK(7, 6)
 74#define MT6360_VBAT_LVL_MASK	BIT(5)
 75/* MT6360_PMU_CHG_CTRL19 */
 76#define MT6360_VINOVP_SHFT	(5)
 77#define MT6360_VINOVP_MASK	GENMASK(6, 5)
 78/* MT6360_PMU_FOD_STAT */
 79#define MT6360_CHRDET_EXT_MASK	BIT(4)
 80
 81/* uV */
 82#define MT6360_VMIVR_MIN	3900000
 83#define MT6360_VMIVR_MAX	13400000
 84#define MT6360_VMIVR_STEP	100000
 85/* uA */
 86#define MT6360_ICHG_MIN		100000
 87#define MT6360_ICHG_MAX		5000000
 88#define MT6360_ICHG_STEP	100000
 89/* uV */
 90#define MT6360_VOREG_MIN	3900000
 91#define MT6360_VOREG_MAX	4710000
 92#define MT6360_VOREG_STEP	10000
 93/* uA */
 94#define MT6360_AICR_MIN		100000
 95#define MT6360_AICR_MAX		3250000
 96#define MT6360_AICR_STEP	50000
 97/* uA */
 98#define MT6360_IPREC_MIN	100000
 99#define MT6360_IPREC_MAX	850000
100#define MT6360_IPREC_STEP	50000
101/* uA */
102#define MT6360_IEOC_MIN		100000
103#define MT6360_IEOC_MAX		850000
104#define MT6360_IEOC_STEP	50000
105
106enum {
107	MT6360_RANGE_VMIVR,
108	MT6360_RANGE_ICHG,
109	MT6360_RANGE_VOREG,
110	MT6360_RANGE_AICR,
111	MT6360_RANGE_IPREC,
112	MT6360_RANGE_IEOC,
113	MT6360_RANGE_MAX,
114};
115
116static const struct linear_range mt6360_chg_range[MT6360_RANGE_MAX] = {
117	LINEAR_RANGE_IDX(MT6360_RANGE_VMIVR, 3900000, 0, 0x5F, 100000),
118	LINEAR_RANGE_IDX(MT6360_RANGE_ICHG, 100000, 0, 0x31, 100000),
119	LINEAR_RANGE_IDX(MT6360_RANGE_VOREG, 3900000, 0, 0x51, 10000),
120	LINEAR_RANGE_IDX(MT6360_RANGE_AICR, 100000, 0, 0x3F, 50000),
121	LINEAR_RANGE_IDX(MT6360_RANGE_IPREC, 100000, 0, 0x0F, 50000),
122	LINEAR_RANGE_IDX(MT6360_RANGE_IEOC, 100000, 0, 0x0F, 50000),
123};
124
125struct mt6360_chg_info {
126	struct device *dev;
127	struct regmap *regmap;
128	struct power_supply_desc psy_desc;
129	struct power_supply *psy;
130	struct regulator_dev *otg_rdev;
131	struct mutex chgdet_lock;
132	u32 vinovp;
133	bool pwr_rdy;
134	bool bc12_en;
135	int psy_usb_type;
136	struct work_struct chrdet_work;
137};
138
139enum mt6360_iinlmtsel {
140	MT6360_IINLMTSEL_AICR_3250 = 0,
141	MT6360_IINLMTSEL_CHG_TYPE,
142	MT6360_IINLMTSEL_AICR,
143	MT6360_IINLMTSEL_LOWER_LEVEL,
144};
145
146enum mt6360_pmu_chg_type {
147	MT6360_CHG_TYPE_NOVBUS = 0,
148	MT6360_CHG_TYPE_UNDER_GOING,
149	MT6360_CHG_TYPE_SDP,
150	MT6360_CHG_TYPE_SDPNSTD,
151	MT6360_CHG_TYPE_DCP,
152	MT6360_CHG_TYPE_CDP,
153	MT6360_CHG_TYPE_DISABLE_BC12,
154	MT6360_CHG_TYPE_MAX,
155};
156
157static int mt6360_get_chrdet_ext_stat(struct mt6360_chg_info *mci,
158					     bool *pwr_rdy)
159{
160	int ret;
161	unsigned int regval;
162
163	ret = regmap_read(mci->regmap, MT6360_PMU_FOD_STAT, &regval);
164	if (ret < 0)
165		return ret;
166	*pwr_rdy = (regval & MT6360_CHRDET_EXT_MASK) ? true : false;
167	return 0;
168}
169
170static int mt6360_charger_get_online(struct mt6360_chg_info *mci,
171				     union power_supply_propval *val)
172{
173	int ret;
174	bool pwr_rdy;
175
176	ret = mt6360_get_chrdet_ext_stat(mci, &pwr_rdy);
177	if (ret < 0)
178		return ret;
179	val->intval = pwr_rdy ? true : false;
180	return 0;
181}
182
183static int mt6360_charger_get_status(struct mt6360_chg_info *mci,
184				     union power_supply_propval *val)
185{
186	int status, ret;
187	unsigned int regval;
188	bool pwr_rdy;
189
190	ret = mt6360_get_chrdet_ext_stat(mci, &pwr_rdy);
191	if (ret < 0)
192		return ret;
193	if (!pwr_rdy) {
194		status = POWER_SUPPLY_STATUS_DISCHARGING;
195		goto out;
196	}
197
198	ret = regmap_read(mci->regmap, MT6360_PMU_CHG_STAT, &regval);
199	if (ret < 0)
200		return ret;
201	regval &= MT6360_CHG_STAT_MASK;
202	regval >>= MT6360_CHG_STAT_SHFT;
203	switch (regval) {
204	case 0x0:
205		status = POWER_SUPPLY_STATUS_NOT_CHARGING;
206		break;
207	case 0x1:
208		status = POWER_SUPPLY_STATUS_CHARGING;
209		break;
210	case 0x2:
211		status = POWER_SUPPLY_STATUS_FULL;
212		break;
213	default:
214		ret = -EIO;
215	}
216out:
217	if (!ret)
218		val->intval = status;
219	return ret;
220}
221
222static int mt6360_charger_get_charge_type(struct mt6360_chg_info *mci,
223					  union power_supply_propval *val)
224{
225	int type, ret;
226	unsigned int regval;
227	u8 chg_stat;
228
229	ret = regmap_read(mci->regmap, MT6360_PMU_CHG_STAT, &regval);
230	if (ret < 0)
231		return ret;
232
233	chg_stat = (regval & MT6360_CHG_STAT_MASK) >> MT6360_CHG_STAT_SHFT;
234	switch (chg_stat) {
235	case 0x01: /* Charge in Progress */
236		if (regval & MT6360_VBAT_LVL_MASK)
237			type = POWER_SUPPLY_CHARGE_TYPE_FAST;
238		else
239			type = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
240		break;
241	case 0x00: /* Not Charging */
242	case 0x02: /* Charge Done */
243	case 0x03: /* Charge Fault */
244	default:
245		type = POWER_SUPPLY_CHARGE_TYPE_NONE;
246		break;
247	}
248
249	val->intval = type;
250	return 0;
251}
252
253static int mt6360_charger_get_ichg(struct mt6360_chg_info *mci,
254				   union power_supply_propval *val)
255{
256	int ret;
257	u32 sel, value;
258
259	ret = regmap_read(mci->regmap, MT6360_PMU_CHG_CTRL7, &sel);
260	if (ret < 0)
261		return ret;
262	sel = (sel & MT6360_ICHG_MASK) >> MT6360_ICHG_SHFT;
263	ret = linear_range_get_value(&mt6360_chg_range[MT6360_RANGE_ICHG], sel, &value);
264	if (!ret)
265		val->intval = value;
266	return ret;
267}
268
269static int mt6360_charger_get_max_ichg(struct mt6360_chg_info *mci,
270				       union power_supply_propval *val)
271{
272	val->intval = MT6360_ICHG_MAX;
273	return 0;
274}
275
276static int mt6360_charger_get_cv(struct mt6360_chg_info *mci,
277				 union power_supply_propval *val)
278{
279	int ret;
280	u32 sel, value;
281
282	ret = regmap_read(mci->regmap, MT6360_PMU_CHG_CTRL4, &sel);
283	if (ret < 0)
284		return ret;
285	sel = (sel & MT6360_VOREG_MASK) >> MT6360_VOREG_SHFT;
286	ret = linear_range_get_value(&mt6360_chg_range[MT6360_RANGE_VOREG], sel, &value);
287	if (!ret)
288		val->intval = value;
289	return ret;
290}
291
292static int mt6360_charger_get_max_cv(struct mt6360_chg_info *mci,
293				     union power_supply_propval *val)
294{
295	val->intval = MT6360_VOREG_MAX;
296	return 0;
297}
298
299static int mt6360_charger_get_aicr(struct mt6360_chg_info *mci,
300				   union power_supply_propval *val)
301{
302	int ret;
303	u32 sel, value;
304
305	ret = regmap_read(mci->regmap, MT6360_PMU_CHG_CTRL3, &sel);
306	if (ret < 0)
307		return ret;
308	sel = (sel & MT6360_IAICR_MASK) >> MT6360_IAICR_SHFT;
309	ret = linear_range_get_value(&mt6360_chg_range[MT6360_RANGE_AICR], sel, &value);
310	if (!ret)
311		val->intval = value;
312	return ret;
313}
314
315static int mt6360_charger_get_mivr(struct mt6360_chg_info *mci,
316				   union power_supply_propval *val)
317{
318	int ret;
319	u32 sel, value;
320
321	ret = regmap_read(mci->regmap, MT6360_PMU_CHG_CTRL6, &sel);
322	if (ret < 0)
323		return ret;
324	sel = (sel & MT6360_VMIVR_MASK) >> MT6360_VMIVR_SHFT;
325	ret = linear_range_get_value(&mt6360_chg_range[MT6360_RANGE_VMIVR], sel, &value);
326	if (!ret)
327		val->intval = value;
328	return ret;
329}
330
331static int mt6360_charger_get_iprechg(struct mt6360_chg_info *mci,
332				      union power_supply_propval *val)
333{
334	int ret;
335	u32 sel, value;
336
337	ret = regmap_read(mci->regmap, MT6360_PMU_CHG_CTRL8, &sel);
338	if (ret < 0)
339		return ret;
340	sel = (sel & MT6360_IPREC_MASK) >> MT6360_IPREC_SHFT;
341	ret = linear_range_get_value(&mt6360_chg_range[MT6360_RANGE_IPREC], sel, &value);
342	if (!ret)
343		val->intval = value;
344	return ret;
345}
346
347static int mt6360_charger_get_ieoc(struct mt6360_chg_info *mci,
348				   union power_supply_propval *val)
349{
350	int ret;
351	u32 sel, value;
352
353	ret = regmap_read(mci->regmap, MT6360_PMU_CHG_CTRL9, &sel);
354	if (ret < 0)
355		return ret;
356	sel = (sel & MT6360_IEOC_MASK) >> MT6360_IEOC_SHFT;
357	ret = linear_range_get_value(&mt6360_chg_range[MT6360_RANGE_IEOC], sel, &value);
358	if (!ret)
359		val->intval = value;
360	return ret;
361}
362
363static int mt6360_charger_set_online(struct mt6360_chg_info *mci,
364				     const union power_supply_propval *val)
365{
366	u8 force_sleep = val->intval ? 0 : 1;
367
368	return regmap_update_bits(mci->regmap,
369				  MT6360_PMU_CHG_CTRL1,
370				  MT6360_FSLP_MASK,
371				  force_sleep << MT6360_FSLP_SHFT);
372}
373
374static int mt6360_charger_set_ichg(struct mt6360_chg_info *mci,
375				   const union power_supply_propval *val)
376{
377	u32 sel;
378
379	linear_range_get_selector_within(&mt6360_chg_range[MT6360_RANGE_ICHG], val->intval, &sel);
380	return regmap_update_bits(mci->regmap,
381				  MT6360_PMU_CHG_CTRL7,
382				  MT6360_ICHG_MASK,
383				  sel << MT6360_ICHG_SHFT);
384}
385
386static int mt6360_charger_set_cv(struct mt6360_chg_info *mci,
387				 const union power_supply_propval *val)
388{
389	u32 sel;
390
391	linear_range_get_selector_within(&mt6360_chg_range[MT6360_RANGE_VOREG], val->intval, &sel);
392	return regmap_update_bits(mci->regmap,
393				  MT6360_PMU_CHG_CTRL4,
394				  MT6360_VOREG_MASK,
395				  sel << MT6360_VOREG_SHFT);
396}
397
398static int mt6360_charger_set_aicr(struct mt6360_chg_info *mci,
399				   const union power_supply_propval *val)
400{
401	u32 sel;
402
403	linear_range_get_selector_within(&mt6360_chg_range[MT6360_RANGE_AICR], val->intval, &sel);
404	return regmap_update_bits(mci->regmap,
405				  MT6360_PMU_CHG_CTRL3,
406				  MT6360_IAICR_MASK,
407				  sel << MT6360_IAICR_SHFT);
408}
409
410static int mt6360_charger_set_mivr(struct mt6360_chg_info *mci,
411				   const union power_supply_propval *val)
412{
413	u32 sel;
414
415	linear_range_get_selector_within(&mt6360_chg_range[MT6360_RANGE_VMIVR], val->intval, &sel);
416	return regmap_update_bits(mci->regmap,
417				  MT6360_PMU_CHG_CTRL3,
418				  MT6360_VMIVR_MASK,
419				  sel << MT6360_VMIVR_SHFT);
420}
421
422static int mt6360_charger_set_iprechg(struct mt6360_chg_info *mci,
423				      const union power_supply_propval *val)
424{
425	u32 sel;
426
427	linear_range_get_selector_within(&mt6360_chg_range[MT6360_RANGE_IPREC], val->intval, &sel);
428	return regmap_update_bits(mci->regmap,
429				  MT6360_PMU_CHG_CTRL8,
430				  MT6360_IPREC_MASK,
431				  sel << MT6360_IPREC_SHFT);
432}
433
434static int mt6360_charger_set_ieoc(struct mt6360_chg_info *mci,
435				   const union power_supply_propval *val)
436{
437	u32 sel;
438
439	linear_range_get_selector_within(&mt6360_chg_range[MT6360_RANGE_IEOC], val->intval, &sel);
440	return regmap_update_bits(mci->regmap,
441				  MT6360_PMU_CHG_CTRL9,
442				  MT6360_IEOC_MASK,
443				  sel << MT6360_IEOC_SHFT);
444}
445
446static int mt6360_charger_get_property(struct power_supply *psy,
447				       enum power_supply_property psp,
448				       union power_supply_propval *val)
449{
450	struct mt6360_chg_info *mci = power_supply_get_drvdata(psy);
451	int ret = 0;
452
453	switch (psp) {
454	case POWER_SUPPLY_PROP_ONLINE:
455		ret = mt6360_charger_get_online(mci, val);
456		break;
457	case POWER_SUPPLY_PROP_STATUS:
458		ret = mt6360_charger_get_status(mci, val);
459		break;
460	case POWER_SUPPLY_PROP_CHARGE_TYPE:
461		ret = mt6360_charger_get_charge_type(mci, val);
462		break;
463	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
464		ret = mt6360_charger_get_ichg(mci, val);
465		break;
466	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
467		ret = mt6360_charger_get_max_ichg(mci, val);
468		break;
469	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
470		ret = mt6360_charger_get_cv(mci, val);
471		break;
472	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
473		ret = mt6360_charger_get_max_cv(mci, val);
474		break;
475	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
476		ret = mt6360_charger_get_aicr(mci, val);
477		break;
478	case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
479		ret = mt6360_charger_get_mivr(mci, val);
480		break;
481	case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
482		ret = mt6360_charger_get_iprechg(mci, val);
483		break;
484	case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
485		ret = mt6360_charger_get_ieoc(mci, val);
486		break;
487	case POWER_SUPPLY_PROP_USB_TYPE:
488		val->intval = mci->psy_usb_type;
489		break;
490	default:
491		ret = -ENODATA;
492	}
493	return ret;
494}
495
496static int mt6360_charger_set_property(struct power_supply *psy,
497				       enum power_supply_property psp,
498				       const union power_supply_propval *val)
499{
500	struct mt6360_chg_info *mci = power_supply_get_drvdata(psy);
501	int ret;
502
503	switch (psp) {
504	case POWER_SUPPLY_PROP_ONLINE:
505		ret = mt6360_charger_set_online(mci, val);
506		break;
507	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
508		ret = mt6360_charger_set_ichg(mci, val);
509		break;
510	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
511		ret = mt6360_charger_set_cv(mci, val);
512		break;
513	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
514		ret = mt6360_charger_set_aicr(mci, val);
515		break;
516	case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
517		ret = mt6360_charger_set_mivr(mci, val);
518		break;
519	case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
520		ret = mt6360_charger_set_iprechg(mci, val);
521		break;
522	case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
523		ret = mt6360_charger_set_ieoc(mci, val);
524		break;
525	default:
526		ret = -EINVAL;
527	}
528	return ret;
529}
530
531static int mt6360_charger_property_is_writeable(struct power_supply *psy,
532					       enum power_supply_property psp)
533{
534	switch (psp) {
535	case POWER_SUPPLY_PROP_ONLINE:
536	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
537	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
538	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
539	case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
540	case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
541	case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
542		return 1;
543	default:
544		return 0;
545	}
546}
547
548static enum power_supply_property mt6360_charger_properties[] = {
549	POWER_SUPPLY_PROP_ONLINE,
550	POWER_SUPPLY_PROP_STATUS,
551	POWER_SUPPLY_PROP_CHARGE_TYPE,
552	POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
553	POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
554	POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
555	POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
556	POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
557	POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT,
558	POWER_SUPPLY_PROP_PRECHARGE_CURRENT,
559	POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT,
560	POWER_SUPPLY_PROP_USB_TYPE,
561};
562
563static const struct power_supply_desc mt6360_charger_desc = {
564	.type			= POWER_SUPPLY_TYPE_USB,
565	.properties		= mt6360_charger_properties,
566	.num_properties		= ARRAY_SIZE(mt6360_charger_properties),
567	.get_property		= mt6360_charger_get_property,
568	.set_property		= mt6360_charger_set_property,
569	.property_is_writeable	= mt6360_charger_property_is_writeable,
570	.usb_types		= BIT(POWER_SUPPLY_USB_TYPE_SDP) |
571				  BIT(POWER_SUPPLY_USB_TYPE_CDP) |
572				  BIT(POWER_SUPPLY_USB_TYPE_DCP) |
573				  BIT(POWER_SUPPLY_USB_TYPE_UNKNOWN),
574};
575
576static const struct regulator_ops mt6360_chg_otg_ops = {
577	.list_voltage = regulator_list_voltage_linear,
578	.enable = regulator_enable_regmap,
579	.disable = regulator_disable_regmap,
580	.is_enabled = regulator_is_enabled_regmap,
581	.set_voltage_sel = regulator_set_voltage_sel_regmap,
582	.get_voltage_sel = regulator_get_voltage_sel_regmap,
583};
584
585static const struct regulator_desc mt6360_otg_rdesc = {
586	.of_match = "usb-otg-vbus-regulator",
587	.name = "usb-otg-vbus",
588	.ops = &mt6360_chg_otg_ops,
589	.owner = THIS_MODULE,
590	.type = REGULATOR_VOLTAGE,
591	.min_uV = 4425000,
592	.uV_step = 25000,
593	.n_voltages = 57,
594	.vsel_reg = MT6360_PMU_CHG_CTRL5,
595	.vsel_mask = MT6360_VOBST_MASK,
596	.enable_reg = MT6360_PMU_CHG_CTRL1,
597	.enable_mask = MT6360_OPA_MODE_MASK,
598};
599
600static irqreturn_t mt6360_pmu_attach_i_handler(int irq, void *data)
601{
602	struct mt6360_chg_info *mci = data;
603	int ret;
604	unsigned int usb_status;
605	int last_usb_type;
606
607	mutex_lock(&mci->chgdet_lock);
608	if (!mci->bc12_en) {
609		dev_warn(mci->dev, "Received attach interrupt, bc12 disabled, ignore irq\n");
610		goto out;
611	}
612	last_usb_type = mci->psy_usb_type;
613	/* Plug in */
614	ret = regmap_read(mci->regmap, MT6360_PMU_USB_STATUS1, &usb_status);
615	if (ret < 0)
616		goto out;
617	usb_status &= MT6360_USB_STATUS_MASK;
618	usb_status >>= MT6360_USB_STATUS_SHFT;
619	switch (usb_status) {
620	case MT6360_CHG_TYPE_NOVBUS:
621		dev_dbg(mci->dev, "Received attach interrupt, no vbus\n");
622		goto out;
623	case MT6360_CHG_TYPE_UNDER_GOING:
624		dev_dbg(mci->dev, "Received attach interrupt, under going...\n");
625		goto out;
626	case MT6360_CHG_TYPE_SDP:
627		mci->psy_usb_type = POWER_SUPPLY_USB_TYPE_SDP;
628		break;
629	case MT6360_CHG_TYPE_SDPNSTD:
630		mci->psy_usb_type = POWER_SUPPLY_USB_TYPE_SDP;
631		break;
632	case MT6360_CHG_TYPE_CDP:
633		mci->psy_usb_type = POWER_SUPPLY_USB_TYPE_CDP;
634		break;
635	case MT6360_CHG_TYPE_DCP:
636		mci->psy_usb_type = POWER_SUPPLY_USB_TYPE_DCP;
637		break;
638	case MT6360_CHG_TYPE_DISABLE_BC12:
639		dev_dbg(mci->dev, "Received attach interrupt, bc12 detect not enable\n");
640		goto out;
641	default:
642		mci->psy_usb_type = POWER_SUPPLY_USB_TYPE_UNKNOWN;
643		dev_dbg(mci->dev, "Received attach interrupt, reserved address\n");
644		goto out;
645	}
646
647	dev_dbg(mci->dev, "Received attach interrupt, chg_type = %d\n", mci->psy_usb_type);
648	if (last_usb_type != mci->psy_usb_type)
649		power_supply_changed(mci->psy);
650out:
651	mutex_unlock(&mci->chgdet_lock);
652	return IRQ_HANDLED;
653}
654
655static void mt6360_handle_chrdet_ext_evt(struct mt6360_chg_info *mci)
656{
657	int ret;
658	bool pwr_rdy;
659
660	mutex_lock(&mci->chgdet_lock);
661	ret = mt6360_get_chrdet_ext_stat(mci, &pwr_rdy);
662	if (ret < 0)
663		goto out;
664	if (mci->pwr_rdy == pwr_rdy) {
665		dev_dbg(mci->dev, "Received vbus interrupt, pwr_rdy is same(%d)\n", pwr_rdy);
666		goto out;
667	}
668	mci->pwr_rdy = pwr_rdy;
669	dev_dbg(mci->dev, "Received vbus interrupt, pwr_rdy = %d\n", pwr_rdy);
670	if (!pwr_rdy) {
671		mci->psy_usb_type = POWER_SUPPLY_USB_TYPE_UNKNOWN;
672		power_supply_changed(mci->psy);
673
674	}
675	ret = regmap_update_bits(mci->regmap,
676				 MT6360_PMU_DEVICE_TYPE,
677				 MT6360_USBCHGEN_MASK,
678				 pwr_rdy ? MT6360_USBCHGEN_MASK : 0);
679	if (ret < 0)
680		goto out;
681	mci->bc12_en = pwr_rdy;
682out:
683	mutex_unlock(&mci->chgdet_lock);
684}
685
686static void mt6360_chrdet_work(struct work_struct *work)
687{
688	struct mt6360_chg_info *mci = (struct mt6360_chg_info *)container_of(
689				     work, struct mt6360_chg_info, chrdet_work);
690
691	mt6360_handle_chrdet_ext_evt(mci);
692}
693
694static irqreturn_t mt6360_pmu_chrdet_ext_evt_handler(int irq, void *data)
695{
696	struct mt6360_chg_info *mci = data;
697
698	mt6360_handle_chrdet_ext_evt(mci);
699	return IRQ_HANDLED;
700}
701
702static int mt6360_chg_irq_register(struct platform_device *pdev)
703{
704	const struct {
705		const char *name;
706		irq_handler_t handler;
707	} irq_descs[] = {
708		{ "attach_i", mt6360_pmu_attach_i_handler },
709		{ "chrdet_ext_evt", mt6360_pmu_chrdet_ext_evt_handler }
710	};
711	int i, ret;
712
713	for (i = 0; i < ARRAY_SIZE(irq_descs); i++) {
714		ret = platform_get_irq_byname(pdev, irq_descs[i].name);
715		if (ret < 0)
716			return ret;
717
718		ret = devm_request_threaded_irq(&pdev->dev, ret, NULL,
719						irq_descs[i].handler,
720						IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
721						irq_descs[i].name,
722						platform_get_drvdata(pdev));
723		if (ret < 0)
724			return dev_err_probe(&pdev->dev, ret, "Failed to request %s irq\n",
725					     irq_descs[i].name);
726	}
727
728	return 0;
729}
730
731static u32 mt6360_vinovp_trans_to_sel(u32 val)
732{
733	u32 vinovp_tbl[] = { 5500000, 6500000, 11000000, 14500000 };
734	int i;
735
736	/* Select the smaller and equal supported value */
737	for (i = 0; i < ARRAY_SIZE(vinovp_tbl)-1; i++) {
738		if (val < vinovp_tbl[i+1])
739			break;
740	}
741	return i;
742}
743
744static int mt6360_chg_init_setting(struct mt6360_chg_info *mci)
745{
746	int ret;
747	u32 sel;
748
749	sel = mt6360_vinovp_trans_to_sel(mci->vinovp);
750	ret = regmap_update_bits(mci->regmap, MT6360_PMU_CHG_CTRL19,
751				  MT6360_VINOVP_MASK, sel << MT6360_VINOVP_SHFT);
752	if (ret)
753		return dev_err_probe(mci->dev, ret, "%s: Failed to apply vinovp\n", __func__);
754	ret = regmap_update_bits(mci->regmap, MT6360_PMU_DEVICE_TYPE,
755				 MT6360_USBCHGEN_MASK, 0);
756	if (ret)
757		return dev_err_probe(mci->dev, ret, "%s: Failed to disable bc12\n", __func__);
758	ret = regmap_update_bits(mci->regmap, MT6360_PMU_CHG_CTRL2,
759				 MT6360_IINLMTSEL_MASK,
760				 MT6360_IINLMTSEL_AICR <<
761					MT6360_IINLMTSEL_SHFT);
762	if (ret)
763		return dev_err_probe(mci->dev, ret,
764				     "%s: Failed to switch iinlmtsel to aicr\n", __func__);
765	usleep_range(5000, 6000);
766	ret = regmap_update_bits(mci->regmap, MT6360_PMU_CHG_CTRL3,
767				 MT6360_ILIM_EN_MASK, 0);
768	if (ret)
769		return dev_err_probe(mci->dev, ret,
770				     "%s: Failed to disable ilim\n", __func__);
771	ret = regmap_update_bits(mci->regmap, MT6360_PMU_CHG_CTRL10,
772				 MT6360_OTG_OC_MASK, MT6360_OTG_OC_MASK);
773	if (ret)
774		return dev_err_probe(mci->dev, ret,
775				     "%s: Failed to config otg oc to 3A\n", __func__);
776	return 0;
777}
778
779static int mt6360_charger_probe(struct platform_device *pdev)
780{
781	struct mt6360_chg_info *mci;
782	struct power_supply_config charger_cfg = {};
783	struct regulator_config config = { };
784	int ret;
785
786	mci = devm_kzalloc(&pdev->dev, sizeof(*mci), GFP_KERNEL);
787	if (!mci)
788		return -ENOMEM;
789
790	mci->dev = &pdev->dev;
791	mci->vinovp = 6500000;
792	mutex_init(&mci->chgdet_lock);
793	platform_set_drvdata(pdev, mci);
794	ret = devm_work_autocancel(&pdev->dev, &mci->chrdet_work, mt6360_chrdet_work);
795	if (ret)
796		return dev_err_probe(&pdev->dev, ret, "Failed to set delayed work\n");
797
798	ret = device_property_read_u32(&pdev->dev, "richtek,vinovp-microvolt", &mci->vinovp);
799	if (ret)
800		dev_warn(&pdev->dev, "Failed to parse vinovp in DT, keep default 6.5v\n");
801
802	mci->regmap = dev_get_regmap(pdev->dev.parent, NULL);
803	if (!mci->regmap)
804		return dev_err_probe(&pdev->dev, -ENODEV, "Failed to get parent regmap\n");
805
806	ret = mt6360_chg_init_setting(mci);
807	if (ret)
808		return dev_err_probe(&pdev->dev, ret, "Failed to initial setting\n");
809
810	memcpy(&mci->psy_desc, &mt6360_charger_desc, sizeof(mci->psy_desc));
811	mci->psy_desc.name = dev_name(&pdev->dev);
812	charger_cfg.drv_data = mci;
813	charger_cfg.fwnode = dev_fwnode(&pdev->dev);
814	mci->psy = devm_power_supply_register(&pdev->dev,
815					      &mci->psy_desc, &charger_cfg);
816	if (IS_ERR(mci->psy))
817		return dev_err_probe(&pdev->dev, PTR_ERR(mci->psy),
818				     "Failed to register power supply dev\n");
819
820
821	ret = mt6360_chg_irq_register(pdev);
822	if (ret)
823		return dev_err_probe(&pdev->dev, ret, "Failed to register irqs\n");
824
825	config.dev = &pdev->dev;
826	config.regmap = mci->regmap;
827	mci->otg_rdev = devm_regulator_register(&pdev->dev, &mt6360_otg_rdesc,
828						&config);
829	if (IS_ERR(mci->otg_rdev))
830		return PTR_ERR(mci->otg_rdev);
831
832	schedule_work(&mci->chrdet_work);
833
834	return 0;
835}
836
837static const struct of_device_id __maybe_unused mt6360_charger_of_id[] = {
838	{ .compatible = "mediatek,mt6360-chg", },
839	{},
840};
841MODULE_DEVICE_TABLE(of, mt6360_charger_of_id);
842
843static const struct platform_device_id mt6360_charger_id[] = {
844	{ "mt6360-chg", 0 },
845	{},
846};
847MODULE_DEVICE_TABLE(platform, mt6360_charger_id);
848
849static struct platform_driver mt6360_charger_driver = {
850	.driver = {
851		.name = "mt6360-chg",
852		.of_match_table = of_match_ptr(mt6360_charger_of_id),
853	},
854	.probe = mt6360_charger_probe,
855	.id_table = mt6360_charger_id,
856};
857module_platform_driver(mt6360_charger_driver);
858
859MODULE_AUTHOR("Gene Chen <gene_chen@richtek.com>");
860MODULE_DESCRIPTION("MT6360 Charger Driver");
861MODULE_LICENSE("GPL");