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17#include <linux/acpi.h>
18#include <linux/module.h>
19#include <linux/device.h>
20#include <linux/regmap.h>
21#include <linux/workqueue.h>
22#include <linux/delay.h>
23#include <linux/platform_device.h>
24#include <linux/usb/otg.h>
25#include <linux/notifier.h>
26#include <linux/power_supply.h>
27#include <linux/property.h>
28#include <linux/mfd/axp20x.h>
29#include <linux/extcon.h>
30
31#define PS_STAT_VBUS_TRIGGER (1 << 0)
32#define PS_STAT_BAT_CHRG_DIR (1 << 2)
33#define PS_STAT_VBAT_ABOVE_VHOLD (1 << 3)
34#define PS_STAT_VBUS_VALID (1 << 4)
35#define PS_STAT_VBUS_PRESENT (1 << 5)
36
37#define CHRG_STAT_BAT_SAFE_MODE (1 << 3)
38#define CHRG_STAT_BAT_VALID (1 << 4)
39#define CHRG_STAT_BAT_PRESENT (1 << 5)
40#define CHRG_STAT_CHARGING (1 << 6)
41#define CHRG_STAT_PMIC_OTP (1 << 7)
42
43#define VBUS_ISPOUT_CUR_LIM_MASK 0x03
44#define VBUS_ISPOUT_CUR_LIM_BIT_POS 0
45#define VBUS_ISPOUT_CUR_LIM_900MA 0x0
46#define VBUS_ISPOUT_CUR_LIM_1500MA 0x1
47#define VBUS_ISPOUT_CUR_LIM_2000MA 0x2
48#define VBUS_ISPOUT_CUR_NO_LIM 0x3
49#define VBUS_ISPOUT_VHOLD_SET_MASK 0x31
50#define VBUS_ISPOUT_VHOLD_SET_BIT_POS 0x3
51#define VBUS_ISPOUT_VHOLD_SET_OFFSET 4000
52#define VBUS_ISPOUT_VHOLD_SET_LSB_RES 100
53#define VBUS_ISPOUT_VHOLD_SET_4300MV 0x3
54#define VBUS_ISPOUT_VBUS_PATH_DIS (1 << 7)
55
56#define CHRG_CCCV_CC_MASK 0xf
57#define CHRG_CCCV_CC_BIT_POS 0
58#define CHRG_CCCV_CC_OFFSET 200
59#define CHRG_CCCV_CC_LSB_RES 200
60#define CHRG_CCCV_ITERM_20P (1 << 4)
61#define CHRG_CCCV_CV_MASK 0x60
62#define CHRG_CCCV_CV_BIT_POS 5
63#define CHRG_CCCV_CV_4100MV 0x0
64#define CHRG_CCCV_CV_4150MV 0x1
65#define CHRG_CCCV_CV_4200MV 0x2
66#define CHRG_CCCV_CV_4350MV 0x3
67#define CHRG_CCCV_CHG_EN (1 << 7)
68
69#define CNTL2_CC_TIMEOUT_MASK 0x3
70#define CNTL2_CC_TIMEOUT_OFFSET 6
71#define CNTL2_CC_TIMEOUT_LSB_RES 2
72#define CNTL2_CC_TIMEOUT_12HRS 0x3
73#define CNTL2_CHGLED_TYPEB (1 << 4)
74#define CNTL2_CHG_OUT_TURNON (1 << 5)
75#define CNTL2_PC_TIMEOUT_MASK 0xC0
76#define CNTL2_PC_TIMEOUT_OFFSET 40
77#define CNTL2_PC_TIMEOUT_LSB_RES 10
78#define CNTL2_PC_TIMEOUT_70MINS 0x3
79
80#define CHRG_ILIM_TEMP_LOOP_EN (1 << 3)
81#define CHRG_VBUS_ILIM_MASK 0xf0
82#define CHRG_VBUS_ILIM_BIT_POS 4
83#define CHRG_VBUS_ILIM_100MA 0x0
84#define CHRG_VBUS_ILIM_500MA 0x1
85#define CHRG_VBUS_ILIM_900MA 0x2
86#define CHRG_VBUS_ILIM_1500MA 0x3
87#define CHRG_VBUS_ILIM_2000MA 0x4
88#define CHRG_VBUS_ILIM_2500MA 0x5
89#define CHRG_VBUS_ILIM_3000MA 0x6
90
91#define CHRG_VLTFC_0C 0xA5
92#define CHRG_VHTFC_45C 0x1F
93
94#define FG_CNTL_OCV_ADJ_EN (1 << 3)
95
96#define CV_4100MV 4100
97#define CV_4150MV 4150
98#define CV_4200MV 4200
99#define CV_4350MV 4350
100
101#define CC_200MA 200
102#define CC_600MA 600
103#define CC_800MA 800
104#define CC_1000MA 1000
105#define CC_1600MA 1600
106#define CC_2000MA 2000
107
108#define ILIM_100MA 100
109#define ILIM_500MA 500
110#define ILIM_900MA 900
111#define ILIM_1500MA 1500
112#define ILIM_2000MA 2000
113#define ILIM_2500MA 2500
114#define ILIM_3000MA 3000
115
116#define AXP288_EXTCON_DEV_NAME "axp288_extcon"
117#define USB_HOST_EXTCON_HID "INT3496"
118#define USB_HOST_EXTCON_NAME "INT3496:00"
119
120static const unsigned int cable_ids[] =
121 { EXTCON_CHG_USB_SDP, EXTCON_CHG_USB_CDP, EXTCON_CHG_USB_DCP };
122
123enum {
124 VBUS_OV_IRQ = 0,
125 CHARGE_DONE_IRQ,
126 CHARGE_CHARGING_IRQ,
127 BAT_SAFE_QUIT_IRQ,
128 BAT_SAFE_ENTER_IRQ,
129 QCBTU_IRQ,
130 CBTU_IRQ,
131 QCBTO_IRQ,
132 CBTO_IRQ,
133 CHRG_INTR_END,
134};
135
136struct axp288_chrg_info {
137 struct platform_device *pdev;
138 struct regmap *regmap;
139 struct regmap_irq_chip_data *regmap_irqc;
140 int irq[CHRG_INTR_END];
141 struct power_supply *psy_usb;
142 struct mutex lock;
143
144
145 struct {
146 struct work_struct work;
147 struct extcon_dev *cable;
148 struct notifier_block id_nb;
149 bool id_short;
150 } otg;
151
152
153 struct {
154 struct extcon_dev *edev;
155 bool connected;
156 enum power_supply_type chg_type;
157 struct notifier_block nb[ARRAY_SIZE(cable_ids)];
158 struct work_struct work;
159 } cable;
160
161 int inlmt;
162 int cc;
163 int cv;
164 int max_cc;
165 int max_cv;
166 int is_charger_enabled;
167};
168
169static inline int axp288_charger_set_cc(struct axp288_chrg_info *info, int cc)
170{
171 u8 reg_val;
172 int ret;
173
174 if (cc < CHRG_CCCV_CC_OFFSET)
175 cc = CHRG_CCCV_CC_OFFSET;
176 else if (cc > info->max_cc)
177 cc = info->max_cc;
178
179 reg_val = (cc - CHRG_CCCV_CC_OFFSET) / CHRG_CCCV_CC_LSB_RES;
180 cc = (reg_val * CHRG_CCCV_CC_LSB_RES) + CHRG_CCCV_CC_OFFSET;
181 reg_val = reg_val << CHRG_CCCV_CC_BIT_POS;
182
183 ret = regmap_update_bits(info->regmap,
184 AXP20X_CHRG_CTRL1,
185 CHRG_CCCV_CC_MASK, reg_val);
186 if (ret >= 0)
187 info->cc = cc;
188
189 return ret;
190}
191
192static inline int axp288_charger_set_cv(struct axp288_chrg_info *info, int cv)
193{
194 u8 reg_val;
195 int ret;
196
197 if (cv <= CV_4100MV) {
198 reg_val = CHRG_CCCV_CV_4100MV;
199 cv = CV_4100MV;
200 } else if (cv <= CV_4150MV) {
201 reg_val = CHRG_CCCV_CV_4150MV;
202 cv = CV_4150MV;
203 } else if (cv <= CV_4200MV) {
204 reg_val = CHRG_CCCV_CV_4200MV;
205 cv = CV_4200MV;
206 } else {
207 reg_val = CHRG_CCCV_CV_4350MV;
208 cv = CV_4350MV;
209 }
210
211 reg_val = reg_val << CHRG_CCCV_CV_BIT_POS;
212
213 ret = regmap_update_bits(info->regmap,
214 AXP20X_CHRG_CTRL1,
215 CHRG_CCCV_CV_MASK, reg_val);
216
217 if (ret >= 0)
218 info->cv = cv;
219
220 return ret;
221}
222
223static inline int axp288_charger_set_vbus_inlmt(struct axp288_chrg_info *info,
224 int inlmt)
225{
226 int ret;
227 unsigned int val;
228 u8 reg_val;
229
230
231 ret = regmap_read(info->regmap, AXP20X_CHRG_BAK_CTRL, &val);
232 if (ret < 0)
233 goto set_inlmt_fail;
234
235 if (inlmt <= ILIM_100MA) {
236 reg_val = CHRG_VBUS_ILIM_100MA;
237 inlmt = ILIM_100MA;
238 } else if (inlmt <= ILIM_500MA) {
239 reg_val = CHRG_VBUS_ILIM_500MA;
240 inlmt = ILIM_500MA;
241 } else if (inlmt <= ILIM_900MA) {
242 reg_val = CHRG_VBUS_ILIM_900MA;
243 inlmt = ILIM_900MA;
244 } else if (inlmt <= ILIM_1500MA) {
245 reg_val = CHRG_VBUS_ILIM_1500MA;
246 inlmt = ILIM_1500MA;
247 } else if (inlmt <= ILIM_2000MA) {
248 reg_val = CHRG_VBUS_ILIM_2000MA;
249 inlmt = ILIM_2000MA;
250 } else if (inlmt <= ILIM_2500MA) {
251 reg_val = CHRG_VBUS_ILIM_2500MA;
252 inlmt = ILIM_2500MA;
253 } else {
254 reg_val = CHRG_VBUS_ILIM_3000MA;
255 inlmt = ILIM_3000MA;
256 }
257
258 reg_val = (val & ~CHRG_VBUS_ILIM_MASK)
259 | (reg_val << CHRG_VBUS_ILIM_BIT_POS);
260 ret = regmap_write(info->regmap, AXP20X_CHRG_BAK_CTRL, reg_val);
261 if (ret >= 0)
262 info->inlmt = inlmt;
263 else
264 dev_err(&info->pdev->dev, "charger BAK control %d\n", ret);
265
266
267set_inlmt_fail:
268 return ret;
269}
270
271static int axp288_charger_vbus_path_select(struct axp288_chrg_info *info,
272 bool enable)
273{
274 int ret;
275
276 if (enable)
277 ret = regmap_update_bits(info->regmap, AXP20X_VBUS_IPSOUT_MGMT,
278 VBUS_ISPOUT_VBUS_PATH_DIS, 0);
279 else
280 ret = regmap_update_bits(info->regmap, AXP20X_VBUS_IPSOUT_MGMT,
281 VBUS_ISPOUT_VBUS_PATH_DIS, VBUS_ISPOUT_VBUS_PATH_DIS);
282
283 if (ret < 0)
284 dev_err(&info->pdev->dev, "axp288 vbus path select %d\n", ret);
285
286
287 return ret;
288}
289
290static int axp288_charger_enable_charger(struct axp288_chrg_info *info,
291 bool enable)
292{
293 int ret;
294
295 if ((int)enable == info->is_charger_enabled)
296 return 0;
297
298 if (enable)
299 ret = regmap_update_bits(info->regmap, AXP20X_CHRG_CTRL1,
300 CHRG_CCCV_CHG_EN, CHRG_CCCV_CHG_EN);
301 else
302 ret = regmap_update_bits(info->regmap, AXP20X_CHRG_CTRL1,
303 CHRG_CCCV_CHG_EN, 0);
304 if (ret < 0)
305 dev_err(&info->pdev->dev, "axp288 enable charger %d\n", ret);
306 else
307 info->is_charger_enabled = enable;
308
309 return ret;
310}
311
312static int axp288_charger_is_present(struct axp288_chrg_info *info)
313{
314 int ret, present = 0;
315 unsigned int val;
316
317 ret = regmap_read(info->regmap, AXP20X_PWR_INPUT_STATUS, &val);
318 if (ret < 0)
319 return ret;
320
321 if (val & PS_STAT_VBUS_PRESENT)
322 present = 1;
323 return present;
324}
325
326static int axp288_charger_is_online(struct axp288_chrg_info *info)
327{
328 int ret, online = 0;
329 unsigned int val;
330
331 ret = regmap_read(info->regmap, AXP20X_PWR_INPUT_STATUS, &val);
332 if (ret < 0)
333 return ret;
334
335 if (val & PS_STAT_VBUS_VALID)
336 online = 1;
337 return online;
338}
339
340static int axp288_get_charger_health(struct axp288_chrg_info *info)
341{
342 int ret, pwr_stat, chrg_stat;
343 int health = POWER_SUPPLY_HEALTH_UNKNOWN;
344 unsigned int val;
345
346 ret = regmap_read(info->regmap, AXP20X_PWR_INPUT_STATUS, &val);
347 if ((ret < 0) || !(val & PS_STAT_VBUS_PRESENT))
348 goto health_read_fail;
349 else
350 pwr_stat = val;
351
352 ret = regmap_read(info->regmap, AXP20X_PWR_OP_MODE, &val);
353 if (ret < 0)
354 goto health_read_fail;
355 else
356 chrg_stat = val;
357
358 if (!(pwr_stat & PS_STAT_VBUS_VALID))
359 health = POWER_SUPPLY_HEALTH_DEAD;
360 else if (chrg_stat & CHRG_STAT_PMIC_OTP)
361 health = POWER_SUPPLY_HEALTH_OVERHEAT;
362 else if (chrg_stat & CHRG_STAT_BAT_SAFE_MODE)
363 health = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE;
364 else
365 health = POWER_SUPPLY_HEALTH_GOOD;
366
367health_read_fail:
368 return health;
369}
370
371static int axp288_charger_usb_set_property(struct power_supply *psy,
372 enum power_supply_property psp,
373 const union power_supply_propval *val)
374{
375 struct axp288_chrg_info *info = power_supply_get_drvdata(psy);
376 int ret = 0;
377 int scaled_val;
378
379 mutex_lock(&info->lock);
380
381 switch (psp) {
382 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
383 scaled_val = min(val->intval, info->max_cc);
384 scaled_val = DIV_ROUND_CLOSEST(scaled_val, 1000);
385 ret = axp288_charger_set_cc(info, scaled_val);
386 if (ret < 0)
387 dev_warn(&info->pdev->dev, "set charge current failed\n");
388 break;
389 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
390 scaled_val = min(val->intval, info->max_cv);
391 scaled_val = DIV_ROUND_CLOSEST(scaled_val, 1000);
392 ret = axp288_charger_set_cv(info, scaled_val);
393 if (ret < 0)
394 dev_warn(&info->pdev->dev, "set charge voltage failed\n");
395 break;
396 default:
397 ret = -EINVAL;
398 }
399
400 mutex_unlock(&info->lock);
401 return ret;
402}
403
404static int axp288_charger_usb_get_property(struct power_supply *psy,
405 enum power_supply_property psp,
406 union power_supply_propval *val)
407{
408 struct axp288_chrg_info *info = power_supply_get_drvdata(psy);
409 int ret = 0;
410
411 mutex_lock(&info->lock);
412
413 switch (psp) {
414 case POWER_SUPPLY_PROP_PRESENT:
415
416 if (info->otg.id_short) {
417 val->intval = 0;
418 break;
419 }
420 ret = axp288_charger_is_present(info);
421 if (ret < 0)
422 goto psy_get_prop_fail;
423 val->intval = ret;
424 break;
425 case POWER_SUPPLY_PROP_ONLINE:
426
427 if (info->otg.id_short) {
428 val->intval = 0;
429 break;
430 }
431 ret = axp288_charger_is_online(info);
432 if (ret < 0)
433 goto psy_get_prop_fail;
434 val->intval = ret;
435 break;
436 case POWER_SUPPLY_PROP_HEALTH:
437 val->intval = axp288_get_charger_health(info);
438 break;
439 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
440 val->intval = info->cc * 1000;
441 break;
442 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
443 val->intval = info->max_cc * 1000;
444 break;
445 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
446 val->intval = info->cv * 1000;
447 break;
448 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
449 val->intval = info->max_cv * 1000;
450 break;
451 case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT:
452 val->intval = info->inlmt * 1000;
453 break;
454 default:
455 ret = -EINVAL;
456 goto psy_get_prop_fail;
457 }
458
459psy_get_prop_fail:
460 mutex_unlock(&info->lock);
461 return ret;
462}
463
464static int axp288_charger_property_is_writeable(struct power_supply *psy,
465 enum power_supply_property psp)
466{
467 int ret;
468
469 switch (psp) {
470 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
471 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
472 ret = 1;
473 break;
474 default:
475 ret = 0;
476 }
477
478 return ret;
479}
480
481static enum power_supply_property axp288_usb_props[] = {
482 POWER_SUPPLY_PROP_PRESENT,
483 POWER_SUPPLY_PROP_ONLINE,
484 POWER_SUPPLY_PROP_TYPE,
485 POWER_SUPPLY_PROP_HEALTH,
486 POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
487 POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
488 POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
489 POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
490 POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT,
491};
492
493static const struct power_supply_desc axp288_charger_desc = {
494 .name = "axp288_charger",
495 .type = POWER_SUPPLY_TYPE_USB,
496 .properties = axp288_usb_props,
497 .num_properties = ARRAY_SIZE(axp288_usb_props),
498 .get_property = axp288_charger_usb_get_property,
499 .set_property = axp288_charger_usb_set_property,
500 .property_is_writeable = axp288_charger_property_is_writeable,
501};
502
503static irqreturn_t axp288_charger_irq_thread_handler(int irq, void *dev)
504{
505 struct axp288_chrg_info *info = dev;
506 int i;
507
508 for (i = 0; i < CHRG_INTR_END; i++) {
509 if (info->irq[i] == irq)
510 break;
511 }
512
513 if (i >= CHRG_INTR_END) {
514 dev_warn(&info->pdev->dev, "spurious interrupt!!\n");
515 return IRQ_NONE;
516 }
517
518 switch (i) {
519 case VBUS_OV_IRQ:
520 dev_dbg(&info->pdev->dev, "VBUS Over Voltage INTR\n");
521 break;
522 case CHARGE_DONE_IRQ:
523 dev_dbg(&info->pdev->dev, "Charging Done INTR\n");
524 break;
525 case CHARGE_CHARGING_IRQ:
526 dev_dbg(&info->pdev->dev, "Start Charging IRQ\n");
527 break;
528 case BAT_SAFE_QUIT_IRQ:
529 dev_dbg(&info->pdev->dev,
530 "Quit Safe Mode(restart timer) Charging IRQ\n");
531 break;
532 case BAT_SAFE_ENTER_IRQ:
533 dev_dbg(&info->pdev->dev,
534 "Enter Safe Mode(timer expire) Charging IRQ\n");
535 break;
536 case QCBTU_IRQ:
537 dev_dbg(&info->pdev->dev,
538 "Quit Battery Under Temperature(CHRG) INTR\n");
539 break;
540 case CBTU_IRQ:
541 dev_dbg(&info->pdev->dev,
542 "Hit Battery Under Temperature(CHRG) INTR\n");
543 break;
544 case QCBTO_IRQ:
545 dev_dbg(&info->pdev->dev,
546 "Quit Battery Over Temperature(CHRG) INTR\n");
547 break;
548 case CBTO_IRQ:
549 dev_dbg(&info->pdev->dev,
550 "Hit Battery Over Temperature(CHRG) INTR\n");
551 break;
552 default:
553 dev_warn(&info->pdev->dev, "Spurious Interrupt!!!\n");
554 goto out;
555 }
556
557 power_supply_changed(info->psy_usb);
558out:
559 return IRQ_HANDLED;
560}
561
562static void axp288_charger_extcon_evt_worker(struct work_struct *work)
563{
564 struct axp288_chrg_info *info =
565 container_of(work, struct axp288_chrg_info, cable.work);
566 int ret, current_limit;
567 struct extcon_dev *edev = info->cable.edev;
568 bool old_connected = info->cable.connected;
569 enum power_supply_type old_chg_type = info->cable.chg_type;
570
571
572 if (extcon_get_state(edev, EXTCON_CHG_USB_SDP) > 0) {
573 dev_dbg(&info->pdev->dev, "USB SDP charger is connected");
574 info->cable.connected = true;
575 info->cable.chg_type = POWER_SUPPLY_TYPE_USB;
576 } else if (extcon_get_state(edev, EXTCON_CHG_USB_CDP) > 0) {
577 dev_dbg(&info->pdev->dev, "USB CDP charger is connected");
578 info->cable.connected = true;
579 info->cable.chg_type = POWER_SUPPLY_TYPE_USB_CDP;
580 } else if (extcon_get_state(edev, EXTCON_CHG_USB_DCP) > 0) {
581 dev_dbg(&info->pdev->dev, "USB DCP charger is connected");
582 info->cable.connected = true;
583 info->cable.chg_type = POWER_SUPPLY_TYPE_USB_DCP;
584 } else {
585 if (old_connected)
586 dev_dbg(&info->pdev->dev, "USB charger disconnected");
587 info->cable.connected = false;
588 info->cable.chg_type = POWER_SUPPLY_TYPE_USB;
589 }
590
591
592 if (old_connected == info->cable.connected &&
593 old_chg_type == info->cable.chg_type)
594 return;
595
596 mutex_lock(&info->lock);
597
598 if (info->cable.connected) {
599 axp288_charger_enable_charger(info, false);
600
601 switch (info->cable.chg_type) {
602 case POWER_SUPPLY_TYPE_USB:
603 current_limit = ILIM_500MA;
604 break;
605 case POWER_SUPPLY_TYPE_USB_CDP:
606 current_limit = ILIM_1500MA;
607 break;
608 case POWER_SUPPLY_TYPE_USB_DCP:
609 current_limit = ILIM_2000MA;
610 break;
611 default:
612
613 current_limit = 0;
614 break;
615 }
616
617
618 ret = axp288_charger_set_vbus_inlmt(info, current_limit);
619 if (ret == 0)
620 axp288_charger_enable_charger(info, true);
621 else
622 dev_err(&info->pdev->dev,
623 "error setting current limit (%d)", ret);
624 } else {
625 axp288_charger_enable_charger(info, false);
626 }
627
628 mutex_unlock(&info->lock);
629
630 power_supply_changed(info->psy_usb);
631}
632
633
634
635
636
637
638static int axp288_charger_handle_cable0_evt(struct notifier_block *nb,
639 unsigned long event, void *param)
640{
641 struct axp288_chrg_info *info =
642 container_of(nb, struct axp288_chrg_info, cable.nb[0]);
643 schedule_work(&info->cable.work);
644 return NOTIFY_OK;
645}
646
647static int axp288_charger_handle_cable1_evt(struct notifier_block *nb,
648 unsigned long event, void *param)
649{
650 struct axp288_chrg_info *info =
651 container_of(nb, struct axp288_chrg_info, cable.nb[1]);
652 schedule_work(&info->cable.work);
653 return NOTIFY_OK;
654}
655
656static int axp288_charger_handle_cable2_evt(struct notifier_block *nb,
657 unsigned long event, void *param)
658{
659 struct axp288_chrg_info *info =
660 container_of(nb, struct axp288_chrg_info, cable.nb[2]);
661 schedule_work(&info->cable.work);
662 return NOTIFY_OK;
663}
664
665static void axp288_charger_otg_evt_worker(struct work_struct *work)
666{
667 struct axp288_chrg_info *info =
668 container_of(work, struct axp288_chrg_info, otg.work);
669 struct extcon_dev *edev = info->otg.cable;
670 int ret, usb_host = extcon_get_state(edev, EXTCON_USB_HOST);
671
672 dev_dbg(&info->pdev->dev, "external connector USB-Host is %s\n",
673 usb_host ? "attached" : "detached");
674
675
676
677
678
679 info->otg.id_short = usb_host;
680
681
682 ret = axp288_charger_vbus_path_select(info, !info->otg.id_short);
683 if (ret < 0)
684 dev_warn(&info->pdev->dev, "vbus path disable failed\n");
685}
686
687static int axp288_charger_handle_otg_evt(struct notifier_block *nb,
688 unsigned long event, void *param)
689{
690 struct axp288_chrg_info *info =
691 container_of(nb, struct axp288_chrg_info, otg.id_nb);
692
693 schedule_work(&info->otg.work);
694
695 return NOTIFY_OK;
696}
697
698static int charger_init_hw_regs(struct axp288_chrg_info *info)
699{
700 int ret, cc, cv;
701 unsigned int val;
702
703
704 ret = regmap_write(info->regmap, AXP20X_V_LTF_CHRG, CHRG_VLTFC_0C);
705 if (ret < 0) {
706 dev_err(&info->pdev->dev, "register(%x) write error(%d)\n",
707 AXP20X_V_LTF_CHRG, ret);
708 return ret;
709 }
710
711 ret = regmap_write(info->regmap, AXP20X_V_HTF_CHRG, CHRG_VHTFC_45C);
712 if (ret < 0) {
713 dev_err(&info->pdev->dev, "register(%x) write error(%d)\n",
714 AXP20X_V_HTF_CHRG, ret);
715 return ret;
716 }
717
718
719 ret = regmap_update_bits(info->regmap,
720 AXP20X_CHRG_CTRL2,
721 CNTL2_CHG_OUT_TURNON, CNTL2_CHG_OUT_TURNON);
722 if (ret < 0) {
723 dev_err(&info->pdev->dev, "register(%x) write error(%d)\n",
724 AXP20X_CHRG_CTRL2, ret);
725 return ret;
726 }
727
728
729 ret = regmap_update_bits(info->regmap,
730 AXP20X_CHRG_CTRL1,
731 CHRG_CCCV_ITERM_20P, 0);
732 if (ret < 0) {
733 dev_err(&info->pdev->dev, "register(%x) write error(%d)\n",
734 AXP20X_CHRG_CTRL1, ret);
735 return ret;
736 }
737
738
739 ret = regmap_update_bits(info->regmap,
740 AXP20X_CC_CTRL,
741 FG_CNTL_OCV_ADJ_EN, 0);
742 if (ret < 0) {
743 dev_err(&info->pdev->dev, "register(%x) write error(%d)\n",
744 AXP20X_CC_CTRL, ret);
745 return ret;
746 }
747
748
749 ret = regmap_read(info->regmap, AXP20X_CHRG_CTRL1, &val);
750 if (ret < 0) {
751 dev_err(&info->pdev->dev, "register(%x) read error(%d)\n",
752 AXP20X_CHRG_CTRL1, ret);
753 return ret;
754 }
755
756
757 cv = (val & CHRG_CCCV_CV_MASK) >> CHRG_CCCV_CV_BIT_POS;
758 switch (cv) {
759 case CHRG_CCCV_CV_4100MV:
760 info->cv = CV_4100MV;
761 break;
762 case CHRG_CCCV_CV_4150MV:
763 info->cv = CV_4150MV;
764 break;
765 case CHRG_CCCV_CV_4200MV:
766 info->cv = CV_4200MV;
767 break;
768 case CHRG_CCCV_CV_4350MV:
769 info->cv = CV_4350MV;
770 break;
771 }
772
773
774 cc = (ret & CHRG_CCCV_CC_MASK) >> CHRG_CCCV_CC_BIT_POS;
775 cc = (cc * CHRG_CCCV_CC_LSB_RES) + CHRG_CCCV_CC_OFFSET;
776 info->cc = cc;
777
778
779
780
781
782 info->max_cv = info->cv;
783 info->max_cc = info->cc;
784
785 return 0;
786}
787
788static int axp288_charger_probe(struct platform_device *pdev)
789{
790 int ret, i, pirq;
791 struct axp288_chrg_info *info;
792 struct device *dev = &pdev->dev;
793 struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
794 struct power_supply_config charger_cfg = {};
795 info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
796 if (!info)
797 return -ENOMEM;
798
799 info->pdev = pdev;
800 info->regmap = axp20x->regmap;
801 info->regmap_irqc = axp20x->regmap_irqc;
802 info->cable.chg_type = -1;
803 info->is_charger_enabled = -1;
804
805 info->cable.edev = extcon_get_extcon_dev(AXP288_EXTCON_DEV_NAME);
806 if (info->cable.edev == NULL) {
807 dev_dbg(&pdev->dev, "%s is not ready, probe deferred\n",
808 AXP288_EXTCON_DEV_NAME);
809 return -EPROBE_DEFER;
810 }
811
812 if (acpi_dev_present(USB_HOST_EXTCON_HID, NULL, -1)) {
813 info->otg.cable = extcon_get_extcon_dev(USB_HOST_EXTCON_NAME);
814 if (info->otg.cable == NULL) {
815 dev_dbg(dev, "EXTCON_USB_HOST is not ready, probe deferred\n");
816 return -EPROBE_DEFER;
817 }
818 dev_info(&pdev->dev,
819 "Using " USB_HOST_EXTCON_HID " extcon for usb-id\n");
820 }
821
822 platform_set_drvdata(pdev, info);
823 mutex_init(&info->lock);
824
825 ret = charger_init_hw_regs(info);
826 if (ret)
827 return ret;
828
829
830 charger_cfg.drv_data = info;
831 info->psy_usb = devm_power_supply_register(dev, &axp288_charger_desc,
832 &charger_cfg);
833 if (IS_ERR(info->psy_usb)) {
834 ret = PTR_ERR(info->psy_usb);
835 dev_err(dev, "failed to register power supply: %d\n", ret);
836 return ret;
837 }
838
839
840 INIT_WORK(&info->cable.work, axp288_charger_extcon_evt_worker);
841 info->cable.nb[0].notifier_call = axp288_charger_handle_cable0_evt;
842 info->cable.nb[1].notifier_call = axp288_charger_handle_cable1_evt;
843 info->cable.nb[2].notifier_call = axp288_charger_handle_cable2_evt;
844 for (i = 0; i < ARRAY_SIZE(cable_ids); i++) {
845 ret = devm_extcon_register_notifier(dev, info->cable.edev,
846 cable_ids[i], &info->cable.nb[i]);
847 if (ret) {
848 dev_err(dev, "failed to register extcon notifier for %u: %d\n",
849 cable_ids[i], ret);
850 return ret;
851 }
852 }
853 schedule_work(&info->cable.work);
854
855
856 INIT_WORK(&info->otg.work, axp288_charger_otg_evt_worker);
857 info->otg.id_nb.notifier_call = axp288_charger_handle_otg_evt;
858 if (info->otg.cable) {
859 ret = devm_extcon_register_notifier(&pdev->dev, info->otg.cable,
860 EXTCON_USB_HOST, &info->otg.id_nb);
861 if (ret) {
862 dev_err(dev, "failed to register EXTCON_USB_HOST notifier\n");
863 return ret;
864 }
865 schedule_work(&info->otg.work);
866 }
867
868
869 for (i = 0; i < CHRG_INTR_END; i++) {
870 pirq = platform_get_irq(info->pdev, i);
871 info->irq[i] = regmap_irq_get_virq(info->regmap_irqc, pirq);
872 if (info->irq[i] < 0) {
873 dev_warn(&info->pdev->dev,
874 "failed to get virtual interrupt=%d\n", pirq);
875 return info->irq[i];
876 }
877 ret = devm_request_threaded_irq(&info->pdev->dev, info->irq[i],
878 NULL, axp288_charger_irq_thread_handler,
879 IRQF_ONESHOT, info->pdev->name, info);
880 if (ret) {
881 dev_err(&pdev->dev, "failed to request interrupt=%d\n",
882 info->irq[i]);
883 return ret;
884 }
885 }
886
887 return 0;
888}
889
890static const struct platform_device_id axp288_charger_id_table[] = {
891 { .name = "axp288_charger" },
892 {},
893};
894MODULE_DEVICE_TABLE(platform, axp288_charger_id_table);
895
896static struct platform_driver axp288_charger_driver = {
897 .probe = axp288_charger_probe,
898 .id_table = axp288_charger_id_table,
899 .driver = {
900 .name = "axp288_charger",
901 },
902};
903
904module_platform_driver(axp288_charger_driver);
905
906MODULE_AUTHOR("Ramakrishna Pallala <ramakrishna.pallala@intel.com>");
907MODULE_DESCRIPTION("X-power AXP288 Charger Driver");
908MODULE_LICENSE("GPL v2");
909
