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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / power / supply / qcom_smbb.c
blobc890e1cec7200548166f3a53dc268147076ee526
1 // SPDX-License-Identifier: GPL-2.0-only
2 /* Copyright (c) 2014, Sony Mobile Communications Inc.
3 *
4 * This driver is for the multi-block Switch-Mode Battery Charger and Boost
5 * (SMBB) hardware, found in Qualcomm PM8941 PMICs. The charger is an
6 * integrated, single-cell lithium-ion battery charger.
7 *
8 * Sub-components:
9 * - Charger core
10 * - Buck
11 * - DC charge-path
12 * - USB charge-path
13 * - Battery interface
14 * - Boost (not implemented)
15 * - Misc
16 * - HF-Buck
17 */
18
19 #include <linux/errno.h>
20 #include <linux/interrupt.h>
21 #include <linux/kernel.h>
22 #include <linux/module.h>
23 #include <linux/mutex.h>
24 #include <linux/of.h>
25 #include <linux/platform_device.h>
26 #include <linux/power_supply.h>
27 #include <linux/regmap.h>
28 #include <linux/slab.h>
29 #include <linux/extcon-provider.h>
30 #include <linux/regulator/driver.h>
31
32 #define SMBB_CHG_VMAX 0x040
33 #define SMBB_CHG_VSAFE 0x041
34 #define SMBB_CHG_CFG 0x043
35 #define SMBB_CHG_IMAX 0x044
36 #define SMBB_CHG_ISAFE 0x045
37 #define SMBB_CHG_VIN_MIN 0x047
38 #define SMBB_CHG_CTRL 0x049
39 #define CTRL_EN BIT(7)
40 #define SMBB_CHG_VBAT_WEAK 0x052
41 #define SMBB_CHG_IBAT_TERM_CHG 0x05b
42 #define IBAT_TERM_CHG_IEOC BIT(7)
43 #define IBAT_TERM_CHG_IEOC_BMS BIT(7)
44 #define IBAT_TERM_CHG_IEOC_CHG 0
45 #define SMBB_CHG_VBAT_DET 0x05d
46 #define SMBB_CHG_TCHG_MAX_EN 0x060
47 #define TCHG_MAX_EN BIT(7)
48 #define SMBB_CHG_WDOG_TIME 0x062
49 #define SMBB_CHG_WDOG_EN 0x065
50 #define WDOG_EN BIT(7)
51
52 #define SMBB_BUCK_REG_MODE 0x174
53 #define BUCK_REG_MODE BIT(0)
54 #define BUCK_REG_MODE_VBAT BIT(0)
55 #define BUCK_REG_MODE_VSYS 0
56
57 #define SMBB_BAT_PRES_STATUS 0x208
58 #define PRES_STATUS_BAT_PRES BIT(7)
59 #define SMBB_BAT_TEMP_STATUS 0x209
60 #define TEMP_STATUS_OK BIT(7)
61 #define TEMP_STATUS_HOT BIT(6)
62 #define SMBB_BAT_BTC_CTRL 0x249
63 #define BTC_CTRL_COMP_EN BIT(7)
64 #define BTC_CTRL_COLD_EXT BIT(1)
65 #define BTC_CTRL_HOT_EXT_N BIT(0)
66
67 #define SMBB_USB_IMAX 0x344
68 #define SMBB_USB_OTG_CTL 0x348
69 #define OTG_CTL_EN BIT(0)
70 #define SMBB_USB_ENUM_TIMER_STOP 0x34e
71 #define ENUM_TIMER_STOP BIT(0)
72 #define SMBB_USB_SEC_ACCESS 0x3d0
73 #define SEC_ACCESS_MAGIC 0xa5
74 #define SMBB_USB_REV_BST 0x3ed
75 #define REV_BST_CHG_GONE BIT(7)
76
77 #define SMBB_DC_IMAX 0x444
78
79 #define SMBB_MISC_REV2 0x601
80 #define SMBB_MISC_BOOT_DONE 0x642
81 #define BOOT_DONE BIT(7)
82
83 #define STATUS_USBIN_VALID BIT(0) /* USB connection is valid */
84 #define STATUS_DCIN_VALID BIT(1) /* DC connection is valid */
85 #define STATUS_BAT_HOT BIT(2) /* Battery temp 1=Hot, 0=Cold */
86 #define STATUS_BAT_OK BIT(3) /* Battery temp OK */
87 #define STATUS_BAT_PRESENT BIT(4) /* Battery is present */
88 #define STATUS_CHG_DONE BIT(5) /* Charge cycle is complete */
89 #define STATUS_CHG_TRKL BIT(6) /* Trickle charging */
90 #define STATUS_CHG_FAST BIT(7) /* Fast charging */
91 #define STATUS_CHG_GONE BIT(8) /* No charger is connected */
92
93 enum smbb_attr {
94 ATTR_BAT_ISAFE,
95 ATTR_BAT_IMAX,
96 ATTR_USBIN_IMAX,
97 ATTR_DCIN_IMAX,
98 ATTR_BAT_VSAFE,
99 ATTR_BAT_VMAX,
100 ATTR_BAT_VMIN,
101 ATTR_CHG_VDET,
102 ATTR_VIN_MIN,
103 _ATTR_CNT,
104 };
105
106 struct smbb_charger {
107 unsigned int revision;
108 unsigned int addr;
109 struct device *dev;
110 struct extcon_dev *edev;
111
112 bool dc_disabled;
113 bool jeita_ext_temp;
114 unsigned long status;
115 struct mutex statlock;
116
117 unsigned int attr[_ATTR_CNT];
118
119 struct power_supply *usb_psy;
120 struct power_supply *dc_psy;
121 struct power_supply *bat_psy;
122 struct regmap *regmap;
123
124 struct regulator_desc otg_rdesc;
125 struct regulator_dev *otg_reg;
126 };
127
128 static const unsigned int smbb_usb_extcon_cable[] = {
129 EXTCON_USB,
130 EXTCON_NONE,
131 };
132
133 static int smbb_vbat_weak_fn(unsigned int index)
134 {
135 return 2100000 + index * 100000;
136 }
137
138 static int smbb_vin_fn(unsigned int index)
139 {
140 if (index > 42)
141 return 5600000 + (index - 43) * 200000;
142 return 3400000 + index * 50000;
143 }
144
145 static int smbb_vmax_fn(unsigned int index)
146 {
147 return 3240000 + index * 10000;
148 }
149
150 static int smbb_vbat_det_fn(unsigned int index)
151 {
152 return 3240000 + index * 20000;
153 }
154
155 static int smbb_imax_fn(unsigned int index)
156 {
157 if (index < 2)
158 return 100000 + index * 50000;
159 return index * 100000;
160 }
161
162 static int smbb_bat_imax_fn(unsigned int index)
163 {
164 return index * 50000;
165 }
166
167 static unsigned int smbb_hw_lookup(unsigned int val, int (*fn)(unsigned int))
168 {
169 unsigned int widx;
170 unsigned int sel;
171
172 for (widx = sel = 0; (*fn)(widx) <= val; ++widx)
173 sel = widx;
174
175 return sel;
176 }
177
178 static const struct smbb_charger_attr {
179 const char *name;
180 unsigned int reg;
181 unsigned int safe_reg;
182 unsigned int max;
183 unsigned int min;
184 unsigned int fail_ok;
185 int (*hw_fn)(unsigned int);
186 } smbb_charger_attrs[] = {
187 [ATTR_BAT_ISAFE] = {
188 .name = "qcom,fast-charge-safe-current",
189 .reg = SMBB_CHG_ISAFE,
190 .max = 3000000,
191 .min = 200000,
192 .hw_fn = smbb_bat_imax_fn,
193 .fail_ok = 1,
194 },
195 [ATTR_BAT_IMAX] = {
196 .name = "qcom,fast-charge-current-limit",
197 .reg = SMBB_CHG_IMAX,
198 .safe_reg = SMBB_CHG_ISAFE,
199 .max = 3000000,
200 .min = 200000,
201 .hw_fn = smbb_bat_imax_fn,
202 },
203 [ATTR_DCIN_IMAX] = {
204 .name = "qcom,dc-current-limit",
205 .reg = SMBB_DC_IMAX,
206 .max = 2500000,
207 .min = 100000,
208 .hw_fn = smbb_imax_fn,
209 },
210 [ATTR_BAT_VSAFE] = {
211 .name = "qcom,fast-charge-safe-voltage",
212 .reg = SMBB_CHG_VSAFE,
213 .max = 5000000,
214 .min = 3240000,
215 .hw_fn = smbb_vmax_fn,
216 .fail_ok = 1,
217 },
218 [ATTR_BAT_VMAX] = {
219 .name = "qcom,fast-charge-high-threshold-voltage",
220 .reg = SMBB_CHG_VMAX,
221 .safe_reg = SMBB_CHG_VSAFE,
222 .max = 5000000,
223 .min = 3240000,
224 .hw_fn = smbb_vmax_fn,
225 },
226 [ATTR_BAT_VMIN] = {
227 .name = "qcom,fast-charge-low-threshold-voltage",
228 .reg = SMBB_CHG_VBAT_WEAK,
229 .max = 3600000,
230 .min = 2100000,
231 .hw_fn = smbb_vbat_weak_fn,
232 },
233 [ATTR_CHG_VDET] = {
234 .name = "qcom,auto-recharge-threshold-voltage",
235 .reg = SMBB_CHG_VBAT_DET,
236 .max = 5000000,
237 .min = 3240000,
238 .hw_fn = smbb_vbat_det_fn,
239 },
240 [ATTR_VIN_MIN] = {
241 .name = "qcom,minimum-input-voltage",
242 .reg = SMBB_CHG_VIN_MIN,
243 .max = 9600000,
244 .min = 4200000,
245 .hw_fn = smbb_vin_fn,
246 },
247 [ATTR_USBIN_IMAX] = {
248 .name = "usb-charge-current-limit",
249 .reg = SMBB_USB_IMAX,
250 .max = 2500000,
251 .min = 100000,
252 .hw_fn = smbb_imax_fn,
253 },
254 };
255
256 static int smbb_charger_attr_write(struct smbb_charger *chg,
257 enum smbb_attr which, unsigned int val)
258 {
259 const struct smbb_charger_attr *prop;
260 unsigned int wval;
261 unsigned int out;
262 int rc;
263
264 prop = &smbb_charger_attrs[which];
265
266 if (val > prop->max || val < prop->min) {
267 dev_err(chg->dev, "value out of range for %s [%u:%u]\n",
268 prop->name, prop->min, prop->max);
269 return -EINVAL;
270 }
271
272 if (prop->safe_reg) {
273 rc = regmap_read(chg->regmap,
274 chg->addr + prop->safe_reg, &wval);
275 if (rc) {
276 dev_err(chg->dev,
277 "unable to read safe value for '%s'\n",
278 prop->name);
279 return rc;
280 }
281
282 wval = prop->hw_fn(wval);
283
284 if (val > wval) {
285 dev_warn(chg->dev,
286 "%s above safe value, clamping at %u\n",
287 prop->name, wval);
288 val = wval;
289 }
290 }
291
292 wval = smbb_hw_lookup(val, prop->hw_fn);
293
294 rc = regmap_write(chg->regmap, chg->addr + prop->reg, wval);
295 if (rc) {
296 dev_err(chg->dev, "unable to update %s", prop->name);
297 return rc;
298 }
299 out = prop->hw_fn(wval);
300 if (out != val) {
301 dev_warn(chg->dev,
302 "%s inaccurate, rounded to %u\n",
303 prop->name, out);
304 }
305
306 dev_dbg(chg->dev, "%s <= %d\n", prop->name, out);
307
308 chg->attr[which] = out;
309
310 return 0;
311 }
312
313 static int smbb_charger_attr_read(struct smbb_charger *chg,
314 enum smbb_attr which)
315 {
316 const struct smbb_charger_attr *prop;
317 unsigned int val;
318 int rc;
319
320 prop = &smbb_charger_attrs[which];
321
322 rc = regmap_read(chg->regmap, chg->addr + prop->reg, &val);
323 if (rc) {
324 dev_err(chg->dev, "failed to read %s\n", prop->name);
325 return rc;
326 }
327 val = prop->hw_fn(val);
328 dev_dbg(chg->dev, "%s => %d\n", prop->name, val);
329
330 chg->attr[which] = val;
331
332 return 0;
333 }
334
335 static int smbb_charger_attr_parse(struct smbb_charger *chg,
336 enum smbb_attr which)
337 {
338 const struct smbb_charger_attr *prop;
339 unsigned int val;
340 int rc;
341
342 prop = &smbb_charger_attrs[which];
343
344 rc = of_property_read_u32(chg->dev->of_node, prop->name, &val);
345 if (rc == 0) {
346 rc = smbb_charger_attr_write(chg, which, val);
347 if (!rc || !prop->fail_ok)
348 return rc;
349 }
350 return smbb_charger_attr_read(chg, which);
351 }
352
353 static void smbb_set_line_flag(struct smbb_charger *chg, int irq, int flag)
354 {
355 bool state;
356 int ret;
357
358 ret = irq_get_irqchip_state(irq, IRQCHIP_STATE_LINE_LEVEL, &state);
359 if (ret < 0) {
360 dev_err(chg->dev, "failed to read irq line\n");
361 return;
362 }
363
364 mutex_lock(&chg->statlock);
365 if (state)
366 chg->status |= flag;
367 else
368 chg->status &= ~flag;
369 mutex_unlock(&chg->statlock);
370
371 dev_dbg(chg->dev, "status = %03lx\n", chg->status);
372 }
373
374 static irqreturn_t smbb_usb_valid_handler(int irq, void *_data)
375 {
376 struct smbb_charger *chg = _data;
377
378 smbb_set_line_flag(chg, irq, STATUS_USBIN_VALID);
379 extcon_set_state_sync(chg->edev, EXTCON_USB,
380 chg->status & STATUS_USBIN_VALID);
381 power_supply_changed(chg->usb_psy);
382
383 return IRQ_HANDLED;
384 }
385
386 static irqreturn_t smbb_dc_valid_handler(int irq, void *_data)
387 {
388 struct smbb_charger *chg = _data;
389
390 smbb_set_line_flag(chg, irq, STATUS_DCIN_VALID);
391 if (!chg->dc_disabled)
392 power_supply_changed(chg->dc_psy);
393
394 return IRQ_HANDLED;
395 }
396
397 static irqreturn_t smbb_bat_temp_handler(int irq, void *_data)
398 {
399 struct smbb_charger *chg = _data;
400 unsigned int val;
401 int rc;
402
403 rc = regmap_read(chg->regmap, chg->addr + SMBB_BAT_TEMP_STATUS, &val);
404 if (rc)
405 return IRQ_HANDLED;
406
407 mutex_lock(&chg->statlock);
408 if (val & TEMP_STATUS_OK) {
409 chg->status |= STATUS_BAT_OK;
410 } else {
411 chg->status &= ~STATUS_BAT_OK;
412 if (val & TEMP_STATUS_HOT)
413 chg->status |= STATUS_BAT_HOT;
414 }
415 mutex_unlock(&chg->statlock);
416
417 power_supply_changed(chg->bat_psy);
418 return IRQ_HANDLED;
419 }
420
421 static irqreturn_t smbb_bat_present_handler(int irq, void *_data)
422 {
423 struct smbb_charger *chg = _data;
424
425 smbb_set_line_flag(chg, irq, STATUS_BAT_PRESENT);
426 power_supply_changed(chg->bat_psy);
427
428 return IRQ_HANDLED;
429 }
430
431 static irqreturn_t smbb_chg_done_handler(int irq, void *_data)
432 {
433 struct smbb_charger *chg = _data;
434
435 smbb_set_line_flag(chg, irq, STATUS_CHG_DONE);
436 power_supply_changed(chg->bat_psy);
437
438 return IRQ_HANDLED;
439 }
440
441 static irqreturn_t smbb_chg_gone_handler(int irq, void *_data)
442 {
443 struct smbb_charger *chg = _data;
444
445 smbb_set_line_flag(chg, irq, STATUS_CHG_GONE);
446 power_supply_changed(chg->bat_psy);
447 power_supply_changed(chg->usb_psy);
448 if (!chg->dc_disabled)
449 power_supply_changed(chg->dc_psy);
450
451 return IRQ_HANDLED;
452 }
453
454 static irqreturn_t smbb_chg_fast_handler(int irq, void *_data)
455 {
456 struct smbb_charger *chg = _data;
457
458 smbb_set_line_flag(chg, irq, STATUS_CHG_FAST);
459 power_supply_changed(chg->bat_psy);
460
461 return IRQ_HANDLED;
462 }
463
464 static irqreturn_t smbb_chg_trkl_handler(int irq, void *_data)
465 {
466 struct smbb_charger *chg = _data;
467
468 smbb_set_line_flag(chg, irq, STATUS_CHG_TRKL);
469 power_supply_changed(chg->bat_psy);
470
471 return IRQ_HANDLED;
472 }
473
474 static const struct smbb_irq {
475 const char *name;
476 irqreturn_t (*handler)(int, void *);
477 } smbb_charger_irqs[] = {
478 { "chg-done", smbb_chg_done_handler },
479 { "chg-fast", smbb_chg_fast_handler },
480 { "chg-trkl", smbb_chg_trkl_handler },
481 { "bat-temp-ok", smbb_bat_temp_handler },
482 { "bat-present", smbb_bat_present_handler },
483 { "chg-gone", smbb_chg_gone_handler },
484 { "usb-valid", smbb_usb_valid_handler },
485 { "dc-valid", smbb_dc_valid_handler },
486 };
487
488 static int smbb_usbin_get_property(struct power_supply *psy,
489 enum power_supply_property psp,
490 union power_supply_propval *val)
491 {
492 struct smbb_charger *chg = power_supply_get_drvdata(psy);
493 int rc = 0;
494
495 switch (psp) {
496 case POWER_SUPPLY_PROP_ONLINE:
497 mutex_lock(&chg->statlock);
498 val->intval = !(chg->status & STATUS_CHG_GONE) &&
499 (chg->status & STATUS_USBIN_VALID);
500 mutex_unlock(&chg->statlock);
501 break;
502 case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT:
503 val->intval = chg->attr[ATTR_USBIN_IMAX];
504 break;
505 case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT_MAX:
506 val->intval = 2500000;
507 break;
508 default:
509 rc = -EINVAL;
510 break;
511 }
512
513 return rc;
514 }
515
516 static int smbb_usbin_set_property(struct power_supply *psy,
517 enum power_supply_property psp,
518 const union power_supply_propval *val)
519 {
520 struct smbb_charger *chg = power_supply_get_drvdata(psy);
521 int rc;
522
523 switch (psp) {
524 case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT:
525 rc = smbb_charger_attr_write(chg, ATTR_USBIN_IMAX,
526 val->intval);
527 break;
528 default:
529 rc = -EINVAL;
530 break;
531 }
532
533 return rc;
534 }
535
536 static int smbb_dcin_get_property(struct power_supply *psy,
537 enum power_supply_property psp,
538 union power_supply_propval *val)
539 {
540 struct smbb_charger *chg = power_supply_get_drvdata(psy);
541 int rc = 0;
542
543 switch (psp) {
544 case POWER_SUPPLY_PROP_ONLINE:
545 mutex_lock(&chg->statlock);
546 val->intval = !(chg->status & STATUS_CHG_GONE) &&
547 (chg->status & STATUS_DCIN_VALID);
548 mutex_unlock(&chg->statlock);
549 break;
550 case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT:
551 val->intval = chg->attr[ATTR_DCIN_IMAX];
552 break;
553 case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT_MAX:
554 val->intval = 2500000;
555 break;
556 default:
557 rc = -EINVAL;
558 break;
559 }
560
561 return rc;
562 }
563
564 static int smbb_dcin_set_property(struct power_supply *psy,
565 enum power_supply_property psp,
566 const union power_supply_propval *val)
567 {
568 struct smbb_charger *chg = power_supply_get_drvdata(psy);
569 int rc;
570
571 switch (psp) {
572 case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT:
573 rc = smbb_charger_attr_write(chg, ATTR_DCIN_IMAX,
574 val->intval);
575 break;
576 default:
577 rc = -EINVAL;
578 break;
579 }
580
581 return rc;
582 }
583
584 static int smbb_charger_writable_property(struct power_supply *psy,
585 enum power_supply_property psp)
586 {
587 return psp == POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT;
588 }
589
590 static int smbb_battery_get_property(struct power_supply *psy,
591 enum power_supply_property psp,
592 union power_supply_propval *val)
593 {
594 struct smbb_charger *chg = power_supply_get_drvdata(psy);
595 unsigned long status;
596 int rc = 0;
597
598 mutex_lock(&chg->statlock);
599 status = chg->status;
600 mutex_unlock(&chg->statlock);
601
602 switch (psp) {
603 case POWER_SUPPLY_PROP_STATUS:
604 if (status & STATUS_CHG_GONE)
605 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
606 else if (!(status & (STATUS_DCIN_VALID | STATUS_USBIN_VALID)))
607 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
608 else if (status & STATUS_CHG_DONE)
609 val->intval = POWER_SUPPLY_STATUS_FULL;
610 else if (!(status & STATUS_BAT_OK))
611 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
612 else if (status & (STATUS_CHG_FAST | STATUS_CHG_TRKL))
613 val->intval = POWER_SUPPLY_STATUS_CHARGING;
614 else /* everything is ok for charging, but we are not... */
615 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
616 break;
617 case POWER_SUPPLY_PROP_HEALTH:
618 if (status & STATUS_BAT_OK)
619 val->intval = POWER_SUPPLY_HEALTH_GOOD;
620 else if (status & STATUS_BAT_HOT)
621 val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
622 else
623 val->intval = POWER_SUPPLY_HEALTH_COLD;
624 break;
625 case POWER_SUPPLY_PROP_CHARGE_TYPE:
626 if (status & STATUS_CHG_FAST)
627 val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST;
628 else if (status & STATUS_CHG_TRKL)
629 val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
630 else
631 val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE;
632 break;
633 case POWER_SUPPLY_PROP_PRESENT:
634 val->intval = !!(status & STATUS_BAT_PRESENT);
635 break;
636 case POWER_SUPPLY_PROP_CURRENT_MAX:
637 val->intval = chg->attr[ATTR_BAT_IMAX];
638 break;
639 case POWER_SUPPLY_PROP_VOLTAGE_MAX:
640 val->intval = chg->attr[ATTR_BAT_VMAX];
641 break;
642 case POWER_SUPPLY_PROP_TECHNOLOGY:
643 /* this charger is a single-cell lithium-ion battery charger
644 * only. If you hook up some other technology, there will be
645 * fireworks.
646 */
647 val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
648 break;
649 case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
650 val->intval = 3000000; /* single-cell li-ion low end */
651 break;
652 default:
653 rc = -EINVAL;
654 break;
655 }
656
657 return rc;
658 }
659
660 static int smbb_battery_set_property(struct power_supply *psy,
661 enum power_supply_property psp,
662 const union power_supply_propval *val)
663 {
664 struct smbb_charger *chg = power_supply_get_drvdata(psy);
665 int rc;
666
667 switch (psp) {
668 case POWER_SUPPLY_PROP_CURRENT_MAX:
669 rc = smbb_charger_attr_write(chg, ATTR_BAT_IMAX, val->intval);
670 break;
671 case POWER_SUPPLY_PROP_VOLTAGE_MAX:
672 rc = smbb_charger_attr_write(chg, ATTR_BAT_VMAX, val->intval);
673 break;
674 default:
675 rc = -EINVAL;
676 break;
677 }
678
679 return rc;
680 }
681
682 static int smbb_battery_writable_property(struct power_supply *psy,
683 enum power_supply_property psp)
684 {
685 switch (psp) {
686 case POWER_SUPPLY_PROP_CURRENT_MAX:
687 case POWER_SUPPLY_PROP_VOLTAGE_MAX:
688 return 1;
689 default:
690 return 0;
691 }
692 }
693
694 static enum power_supply_property smbb_charger_properties[] = {
695 POWER_SUPPLY_PROP_ONLINE,
696 POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT,
697 POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT_MAX,
698 };
699
700 static enum power_supply_property smbb_battery_properties[] = {
701 POWER_SUPPLY_PROP_STATUS,
702 POWER_SUPPLY_PROP_HEALTH,
703 POWER_SUPPLY_PROP_PRESENT,
704 POWER_SUPPLY_PROP_CHARGE_TYPE,
705 POWER_SUPPLY_PROP_CURRENT_MAX,
706 POWER_SUPPLY_PROP_VOLTAGE_MAX,
707 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
708 POWER_SUPPLY_PROP_TECHNOLOGY,
709 };
710
711 static const struct reg_off_mask_default {
712 unsigned int offset;
713 unsigned int mask;
714 unsigned int value;
715 unsigned int rev_mask;
716 } smbb_charger_setup[] = {
717 /* The bootloader is supposed to set this... make sure anyway. */
718 { SMBB_MISC_BOOT_DONE, BOOT_DONE, BOOT_DONE },
719
720 /* Disable software timer */
721 { SMBB_CHG_TCHG_MAX_EN, TCHG_MAX_EN, 0 },
722
723 /* Clear and disable watchdog */
724 { SMBB_CHG_WDOG_TIME, 0xff, 160 },
725 { SMBB_CHG_WDOG_EN, WDOG_EN, 0 },
726
727 /* Use charger based EoC detection */
728 { SMBB_CHG_IBAT_TERM_CHG, IBAT_TERM_CHG_IEOC, IBAT_TERM_CHG_IEOC_CHG },
729
730 /* Disable GSM PA load adjustment.
731 * The PA signal is incorrectly connected on v2.
732 */
733 { SMBB_CHG_CFG, 0xff, 0x00, BIT(3) },
734
735 /* Use VBAT (not VSYS) to compensate for IR drop during fast charging */
736 { SMBB_BUCK_REG_MODE, BUCK_REG_MODE, BUCK_REG_MODE_VBAT },
737
738 /* Enable battery temperature comparators */
739 { SMBB_BAT_BTC_CTRL, BTC_CTRL_COMP_EN, BTC_CTRL_COMP_EN },
740
741 /* Stop USB enumeration timer */
742 { SMBB_USB_ENUM_TIMER_STOP, ENUM_TIMER_STOP, ENUM_TIMER_STOP },
743
744 #if 0 /* FIXME supposedly only to disable hardware ARB termination */
745 { SMBB_USB_SEC_ACCESS, SEC_ACCESS_MAGIC },
746 { SMBB_USB_REV_BST, 0xff, REV_BST_CHG_GONE },
747 #endif
748
749 /* Stop USB enumeration timer, again */
750 { SMBB_USB_ENUM_TIMER_STOP, ENUM_TIMER_STOP, ENUM_TIMER_STOP },
751
752 /* Enable charging */
753 { SMBB_CHG_CTRL, CTRL_EN, CTRL_EN },
754 };
755
756 static char *smbb_bif[] = { "smbb-bif" };
757
758 static const struct power_supply_desc bat_psy_desc = {
759 .name = "smbb-bif",
760 .type = POWER_SUPPLY_TYPE_BATTERY,
761 .properties = smbb_battery_properties,
762 .num_properties = ARRAY_SIZE(smbb_battery_properties),
763 .get_property = smbb_battery_get_property,
764 .set_property = smbb_battery_set_property,
765 .property_is_writeable = smbb_battery_writable_property,
766 };
767
768 static const struct power_supply_desc usb_psy_desc = {
769 .name = "smbb-usbin",
770 .type = POWER_SUPPLY_TYPE_USB,
771 .properties = smbb_charger_properties,
772 .num_properties = ARRAY_SIZE(smbb_charger_properties),
773 .get_property = smbb_usbin_get_property,
774 .set_property = smbb_usbin_set_property,
775 .property_is_writeable = smbb_charger_writable_property,
776 };
777
778 static const struct power_supply_desc dc_psy_desc = {
779 .name = "smbb-dcin",
780 .type = POWER_SUPPLY_TYPE_MAINS,
781 .properties = smbb_charger_properties,
782 .num_properties = ARRAY_SIZE(smbb_charger_properties),
783 .get_property = smbb_dcin_get_property,
784 .set_property = smbb_dcin_set_property,
785 .property_is_writeable = smbb_charger_writable_property,
786 };
787
788 static int smbb_chg_otg_enable(struct regulator_dev *rdev)
789 {
790 struct smbb_charger *chg = rdev_get_drvdata(rdev);
791 int rc;
792
793 rc = regmap_update_bits(chg->regmap, chg->addr + SMBB_USB_OTG_CTL,
794 OTG_CTL_EN, OTG_CTL_EN);
795 if (rc)
796 dev_err(chg->dev, "failed to update OTG_CTL\n");
797 return rc;
798 }
799
800 static int smbb_chg_otg_disable(struct regulator_dev *rdev)
801 {
802 struct smbb_charger *chg = rdev_get_drvdata(rdev);
803 int rc;
804
805 rc = regmap_update_bits(chg->regmap, chg->addr + SMBB_USB_OTG_CTL,
806 OTG_CTL_EN, 0);
807 if (rc)
808 dev_err(chg->dev, "failed to update OTG_CTL\n");
809 return rc;
810 }
811
812 static int smbb_chg_otg_is_enabled(struct regulator_dev *rdev)
813 {
814 struct smbb_charger *chg = rdev_get_drvdata(rdev);
815 unsigned int value = 0;
816 int rc;
817
818 rc = regmap_read(chg->regmap, chg->addr + SMBB_USB_OTG_CTL, &value);
819 if (rc)
820 dev_err(chg->dev, "failed to read OTG_CTL\n");
821
822 return !!(value & OTG_CTL_EN);
823 }
824
825 static const struct regulator_ops smbb_chg_otg_ops = {
826 .enable = smbb_chg_otg_enable,
827 .disable = smbb_chg_otg_disable,
828 .is_enabled = smbb_chg_otg_is_enabled,
829 };
830
831 static int smbb_charger_probe(struct platform_device *pdev)
832 {
833 struct power_supply_config bat_cfg = {};
834 struct power_supply_config usb_cfg = {};
835 struct power_supply_config dc_cfg = {};
836 struct smbb_charger *chg;
837 struct regulator_config config = { };
838 int rc, i;
839
840 chg = devm_kzalloc(&pdev->dev, sizeof(*chg), GFP_KERNEL);
841 if (!chg)
842 return -ENOMEM;
843
844 chg->dev = &pdev->dev;
845 mutex_init(&chg->statlock);
846
847 chg->regmap = dev_get_regmap(pdev->dev.parent, NULL);
848 if (!chg->regmap) {
849 dev_err(&pdev->dev, "failed to locate regmap\n");
850 return -ENODEV;
851 }
852
853 rc = of_property_read_u32(pdev->dev.of_node, "reg", &chg->addr);
854 if (rc) {
855 dev_err(&pdev->dev, "missing or invalid 'reg' property\n");
856 return rc;
857 }
858
859 rc = regmap_read(chg->regmap, chg->addr + SMBB_MISC_REV2, &chg->revision);
860 if (rc) {
861 dev_err(&pdev->dev, "unable to read revision\n");
862 return rc;
863 }
864
865 chg->revision += 1;
866 if (chg->revision != 2 && chg->revision != 3) {
867 dev_err(&pdev->dev, "v1 hardware not supported\n");
868 return -ENODEV;
869 }
870 dev_info(&pdev->dev, "Initializing SMBB rev %u", chg->revision);
871
872 chg->dc_disabled = of_property_read_bool(pdev->dev.of_node, "qcom,disable-dc");
873
874 for (i = 0; i < _ATTR_CNT; ++i) {
875 rc = smbb_charger_attr_parse(chg, i);
876 if (rc) {
877 dev_err(&pdev->dev, "failed to parse/apply settings\n");
878 return rc;
879 }
880 }
881
882 bat_cfg.drv_data = chg;
883 bat_cfg.of_node = pdev->dev.of_node;
884 chg->bat_psy = devm_power_supply_register(&pdev->dev,
885 &bat_psy_desc,
886 &bat_cfg);
887 if (IS_ERR(chg->bat_psy)) {
888 dev_err(&pdev->dev, "failed to register battery\n");
889 return PTR_ERR(chg->bat_psy);
890 }
891
892 usb_cfg.drv_data = chg;
893 usb_cfg.supplied_to = smbb_bif;
894 usb_cfg.num_supplicants = ARRAY_SIZE(smbb_bif);
895 chg->usb_psy = devm_power_supply_register(&pdev->dev,
896 &usb_psy_desc,
897 &usb_cfg);
898 if (IS_ERR(chg->usb_psy)) {
899 dev_err(&pdev->dev, "failed to register USB power supply\n");
900 return PTR_ERR(chg->usb_psy);
901 }
902
903 chg->edev = devm_extcon_dev_allocate(&pdev->dev, smbb_usb_extcon_cable);
904 if (IS_ERR(chg->edev)) {
905 dev_err(&pdev->dev, "failed to allocate extcon device\n");
906 return -ENOMEM;
907 }
908
909 rc = devm_extcon_dev_register(&pdev->dev, chg->edev);
910 if (rc < 0) {
911 dev_err(&pdev->dev, "failed to register extcon device\n");
912 return rc;
913 }
914
915 if (!chg->dc_disabled) {
916 dc_cfg.drv_data = chg;
917 dc_cfg.supplied_to = smbb_bif;
918 dc_cfg.num_supplicants = ARRAY_SIZE(smbb_bif);
919 chg->dc_psy = devm_power_supply_register(&pdev->dev,
920 &dc_psy_desc,
921 &dc_cfg);
922 if (IS_ERR(chg->dc_psy)) {
923 dev_err(&pdev->dev, "failed to register DC power supply\n");
924 return PTR_ERR(chg->dc_psy);
925 }
926 }
927
928 for (i = 0; i < ARRAY_SIZE(smbb_charger_irqs); ++i) {
929 int irq;
930
931 irq = platform_get_irq_byname(pdev, smbb_charger_irqs[i].name);
932 if (irq < 0) {
933 dev_err(&pdev->dev, "failed to get irq '%s'\n",
934 smbb_charger_irqs[i].name);
935 return irq;
936 }
937
938 smbb_charger_irqs[i].handler(irq, chg);
939
940 rc = devm_request_threaded_irq(&pdev->dev, irq, NULL,
941 smbb_charger_irqs[i].handler, IRQF_ONESHOT,
942 smbb_charger_irqs[i].name, chg);
943 if (rc) {
944 dev_err(&pdev->dev, "failed to request irq '%s'\n",
945 smbb_charger_irqs[i].name);
946 return rc;
947 }
948 }
949
950 /*
951 * otg regulator is used to control VBUS voltage direction
952 * when USB switches between host and gadget mode
953 */
954 chg->otg_rdesc.id = -1;
955 chg->otg_rdesc.name = "otg-vbus";
956 chg->otg_rdesc.ops = &smbb_chg_otg_ops;
957 chg->otg_rdesc.owner = THIS_MODULE;
958 chg->otg_rdesc.type = REGULATOR_VOLTAGE;
959 chg->otg_rdesc.supply_name = "usb-otg-in";
960 chg->otg_rdesc.of_match = "otg-vbus";
961
962 config.dev = &pdev->dev;
963 config.driver_data = chg;
964
965 chg->otg_reg = devm_regulator_register(&pdev->dev, &chg->otg_rdesc,
966 &config);
967 if (IS_ERR(chg->otg_reg))
968 return PTR_ERR(chg->otg_reg);
969
970 chg->jeita_ext_temp = of_property_read_bool(pdev->dev.of_node,
971 "qcom,jeita-extended-temp-range");
972
973 /* Set temperature range to [35%:70%] or [25%:80%] accordingly */
974 rc = regmap_update_bits(chg->regmap, chg->addr + SMBB_BAT_BTC_CTRL,
975 BTC_CTRL_COLD_EXT | BTC_CTRL_HOT_EXT_N,
976 chg->jeita_ext_temp ?
977 BTC_CTRL_COLD_EXT :
978 BTC_CTRL_HOT_EXT_N);
979 if (rc) {
980 dev_err(&pdev->dev,
981 "unable to set %s temperature range\n",
982 chg->jeita_ext_temp ? "JEITA extended" : "normal");
983 return rc;
984 }
985
986 for (i = 0; i < ARRAY_SIZE(smbb_charger_setup); ++i) {
987 const struct reg_off_mask_default *r = &smbb_charger_setup[i];
988
989 if (r->rev_mask & BIT(chg->revision))
990 continue;
991
992 rc = regmap_update_bits(chg->regmap, chg->addr + r->offset,
993 r->mask, r->value);
994 if (rc) {
995 dev_err(&pdev->dev,
996 "unable to initializing charging, bailing\n");
997 return rc;
998 }
999 }
1000
1001 platform_set_drvdata(pdev, chg);
1002
1003 return 0;
1004 }
1005
1006 static int smbb_charger_remove(struct platform_device *pdev)
1007 {
1008 struct smbb_charger *chg;
1009
1010 chg = platform_get_drvdata(pdev);
1011
1012 regmap_update_bits(chg->regmap, chg->addr + SMBB_CHG_CTRL, CTRL_EN, 0);
1013
1014 return 0;
1015 }
1016
1017 static const struct of_device_id smbb_charger_id_table[] = {
1018 { .compatible = "qcom,pm8941-charger" },
1019 { }
1020 };
1021 MODULE_DEVICE_TABLE(of, smbb_charger_id_table);
1022
1023 static struct platform_driver smbb_charger_driver = {
1024 .probe = smbb_charger_probe,
1025 .remove = smbb_charger_remove,
1026 .driver = {
1027 .name = "qcom-smbb",
1028 .of_match_table = smbb_charger_id_table,
1029 },
1030 };
1031 module_platform_driver(smbb_charger_driver);
1032
1033 MODULE_DESCRIPTION("Qualcomm Switch-Mode Battery Charger and Boost driver");
1034 MODULE_LICENSE("GPL v2");
Linux with added FPC-III support