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1/*
2 * Battery driver for Marvell 88PM860x PMIC
3 *
4 * Copyright (c) 2012 Marvell International Ltd.
5 * Author: Jett Zhou <jtzhou@marvell.com>
6 * Haojian Zhuang <haojian.zhuang@marvell.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12
13#include <linux/kernel.h>
14#include <linux/module.h>
15#include <linux/platform_device.h>
16#include <linux/slab.h>
17#include <linux/power_supply.h>
18#include <linux/mfd/88pm860x.h>
19#include <linux/delay.h>
20#include <linux/uaccess.h>
21#include <asm/div64.h>
22
23/* bit definitions of Status Query Interface 2 */
24#define STATUS2_CHG (1 << 2)
25
26/* bit definitions of Reset Out Register */
27#define RESET_SW_PD (1 << 7)
28
29/* bit definitions of PreReg 1 */
30#define PREREG1_90MA (0x0)
31#define PREREG1_180MA (0x1)
32#define PREREG1_450MA (0x4)
33#define PREREG1_540MA (0x5)
34#define PREREG1_1350MA (0xE)
35#define PREREG1_VSYS_4_5V (3 << 4)
36
37/* bit definitions of Charger Control 1 Register */
38#define CC1_MODE_OFF (0)
39#define CC1_MODE_PRECHARGE (1)
40#define CC1_MODE_FASTCHARGE (2)
41#define CC1_MODE_PULSECHARGE (3)
42#define CC1_ITERM_20MA (0 << 2)
43#define CC1_ITERM_60MA (2 << 2)
44#define CC1_VFCHG_4_2V (9 << 4)
45
46/* bit definitions of Charger Control 2 Register */
47#define CC2_ICHG_100MA (0x1)
48#define CC2_ICHG_500MA (0x9)
49#define CC2_ICHG_1000MA (0x13)
50
51/* bit definitions of Charger Control 3 Register */
52#define CC3_180MIN_TIMEOUT (0x6 << 4)
53#define CC3_270MIN_TIMEOUT (0x7 << 4)
54#define CC3_360MIN_TIMEOUT (0xA << 4)
55#define CC3_DISABLE_TIMEOUT (0xF << 4)
56
57/* bit definitions of Charger Control 4 Register */
58#define CC4_IPRE_40MA (7)
59#define CC4_VPCHG_3_2V (3 << 4)
60#define CC4_IFCHG_MON_EN (1 << 6)
61#define CC4_BTEMP_MON_EN (1 << 7)
62
63/* bit definitions of Charger Control 6 Register */
64#define CC6_BAT_OV_EN (1 << 2)
65#define CC6_BAT_UV_EN (1 << 3)
66#define CC6_UV_VBAT_SET (0x3 << 6) /* 2.8v */
67
68/* bit definitions of Charger Control 7 Register */
69#define CC7_BAT_REM_EN (1 << 3)
70#define CC7_IFSM_EN (1 << 7)
71
72/* bit definitions of Measurement Enable 1 Register */
73#define MEAS1_VBAT (1 << 0)
74
75/* bit definitions of Measurement Enable 3 Register */
76#define MEAS3_IBAT_EN (1 << 0)
77#define MEAS3_CC_EN (1 << 2)
78
79#define FSM_INIT 0
80#define FSM_DISCHARGE 1
81#define FSM_PRECHARGE 2
82#define FSM_FASTCHARGE 3
83
84#define PRECHARGE_THRESHOLD 3100
85#define POWEROFF_THRESHOLD 3400
86#define CHARGE_THRESHOLD 4000
87#define DISCHARGE_THRESHOLD 4180
88
89/* over-temperature on PM8606 setting */
90#define OVER_TEMP_FLAG (1 << 6)
91#define OVTEMP_AUTORECOVER (1 << 3)
92
93/* over-voltage protect on vchg setting mv */
94#define VCHG_NORMAL_LOW 4200
95#define VCHG_NORMAL_CHECK 5800
96#define VCHG_NORMAL_HIGH 6000
97#define VCHG_OVP_LOW 5500
98
99struct pm860x_charger_info {
100 struct pm860x_chip *chip;
101 struct i2c_client *i2c;
102 struct i2c_client *i2c_8606;
103 struct device *dev;
104
105 struct power_supply usb;
106 struct mutex lock;
107 int irq_nums;
108 int irq[7];
109 unsigned state:3; /* fsm state */
110 unsigned online:1; /* usb charger */
111 unsigned present:1; /* battery present */
112 unsigned allowed:1;
113};
114
115static char *pm860x_supplied_to[] = {
116 "battery-monitor",
117};
118
119static int measure_vchg(struct pm860x_charger_info *info, int *data)
120{
121 unsigned char buf[2];
122 int ret = 0;
123
124 ret = pm860x_bulk_read(info->i2c, PM8607_VCHG_MEAS1, 2, buf);
125 if (ret < 0)
126 return ret;
127
128 *data = ((buf[0] & 0xff) << 4) | (buf[1] & 0x0f);
129 /* V_BATT_MEAS(mV) = value * 5 * 1.8 * 1000 / (2^12) */
130 *data = ((*data & 0xfff) * 9 * 125) >> 9;
131
132 dev_dbg(info->dev, "%s, vchg: %d mv\n", __func__, *data);
133
134 return ret;
135}
136
137static void set_vchg_threshold(struct pm860x_charger_info *info,
138 int min, int max)
139{
140 int data;
141
142 /* (tmp << 8) * / 5 / 1800 */
143 if (min <= 0)
144 data = 0;
145 else
146 data = (min << 5) / 1125;
147 pm860x_reg_write(info->i2c, PM8607_VCHG_LOWTH, data);
148 dev_dbg(info->dev, "VCHG_LOWTH:%dmv, 0x%x\n", min, data);
149
150 if (max <= 0)
151 data = 0xff;
152 else
153 data = (max << 5) / 1125;
154 pm860x_reg_write(info->i2c, PM8607_VCHG_HIGHTH, data);
155 dev_dbg(info->dev, "VCHG_HIGHTH:%dmv, 0x%x\n", max, data);
156
157}
158
159static void set_vbatt_threshold(struct pm860x_charger_info *info,
160 int min, int max)
161{
162 int data;
163
164 /* (tmp << 8) * 3 / 1800 */
165 if (min <= 0)
166 data = 0;
167 else
168 data = (min << 5) / 675;
169 pm860x_reg_write(info->i2c, PM8607_VBAT_LOWTH, data);
170 dev_dbg(info->dev, "VBAT Min:%dmv, LOWTH:0x%x\n", min, data);
171
172 if (max <= 0)
173 data = 0xff;
174 else
175 data = (max << 5) / 675;
176 pm860x_reg_write(info->i2c, PM8607_VBAT_HIGHTH, data);
177 dev_dbg(info->dev, "VBAT Max:%dmv, HIGHTH:0x%x\n", max, data);
178
179 return;
180}
181
182static int start_precharge(struct pm860x_charger_info *info)
183{
184 int ret;
185
186 dev_dbg(info->dev, "Start Pre-charging!\n");
187 set_vbatt_threshold(info, 0, 0);
188
189 ret = pm860x_reg_write(info->i2c_8606, PM8606_PREREGULATORA,
190 PREREG1_1350MA | PREREG1_VSYS_4_5V);
191 if (ret < 0)
192 goto out;
193 /* stop charging */
194 ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL1, 3,
195 CC1_MODE_OFF);
196 if (ret < 0)
197 goto out;
198 /* set 270 minutes timeout */
199 ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL3, (0xf << 4),
200 CC3_270MIN_TIMEOUT);
201 if (ret < 0)
202 goto out;
203 /* set precharge current, termination voltage, IBAT & TBAT monitor */
204 ret = pm860x_reg_write(info->i2c, PM8607_CHG_CTRL4,
205 CC4_IPRE_40MA | CC4_VPCHG_3_2V |
206 CC4_IFCHG_MON_EN | CC4_BTEMP_MON_EN);
207 if (ret < 0)
208 goto out;
209 ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL7,
210 CC7_BAT_REM_EN | CC7_IFSM_EN,
211 CC7_BAT_REM_EN | CC7_IFSM_EN);
212 if (ret < 0)
213 goto out;
214 /* trigger precharge */
215 ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL1, 3,
216 CC1_MODE_PRECHARGE);
217out:
218 return ret;
219}
220
221static int start_fastcharge(struct pm860x_charger_info *info)
222{
223 int ret;
224
225 dev_dbg(info->dev, "Start Fast-charging!\n");
226
227 /* set fastcharge termination current & voltage, disable charging */
228 ret = pm860x_reg_write(info->i2c, PM8607_CHG_CTRL1,
229 CC1_MODE_OFF | CC1_ITERM_60MA |
230 CC1_VFCHG_4_2V);
231 if (ret < 0)
232 goto out;
233 ret = pm860x_reg_write(info->i2c_8606, PM8606_PREREGULATORA,
234 PREREG1_540MA | PREREG1_VSYS_4_5V);
235 if (ret < 0)
236 goto out;
237 ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL2, 0x1f,
238 CC2_ICHG_500MA);
239 if (ret < 0)
240 goto out;
241 /* set 270 minutes timeout */
242 ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL3, (0xf << 4),
243 CC3_270MIN_TIMEOUT);
244 if (ret < 0)
245 goto out;
246 /* set IBAT & TBAT monitor */
247 ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL4,
248 CC4_IFCHG_MON_EN | CC4_BTEMP_MON_EN,
249 CC4_IFCHG_MON_EN | CC4_BTEMP_MON_EN);
250 if (ret < 0)
251 goto out;
252 ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL6,
253 CC6_BAT_OV_EN | CC6_BAT_UV_EN |
254 CC6_UV_VBAT_SET,
255 CC6_BAT_OV_EN | CC6_BAT_UV_EN |
256 CC6_UV_VBAT_SET);
257 if (ret < 0)
258 goto out;
259 ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL7,
260 CC7_BAT_REM_EN | CC7_IFSM_EN,
261 CC7_BAT_REM_EN | CC7_IFSM_EN);
262 if (ret < 0)
263 goto out;
264 /* launch fast-charge */
265 ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL1, 3,
266 CC1_MODE_FASTCHARGE);
267 /* vchg threshold setting */
268 set_vchg_threshold(info, VCHG_NORMAL_LOW, VCHG_NORMAL_HIGH);
269out:
270 return ret;
271}
272
273static void stop_charge(struct pm860x_charger_info *info, int vbatt)
274{
275 dev_dbg(info->dev, "Stop charging!\n");
276 pm860x_set_bits(info->i2c, PM8607_CHG_CTRL1, 3, CC1_MODE_OFF);
277 if (vbatt > CHARGE_THRESHOLD && info->online)
278 set_vbatt_threshold(info, CHARGE_THRESHOLD, 0);
279}
280
281static void power_off_notification(struct pm860x_charger_info *info)
282{
283 dev_dbg(info->dev, "Power-off notification!\n");
284}
285
286static int set_charging_fsm(struct pm860x_charger_info *info)
287{
288 struct power_supply *psy;
289 union power_supply_propval data;
290 unsigned char fsm_state[][16] = { "init", "discharge", "precharge",
291 "fastcharge",
292 };
293 int ret;
294 int vbatt;
295
296 psy = power_supply_get_by_name(pm860x_supplied_to[0]);
297 if (!psy)
298 return -EINVAL;
299 ret = psy->get_property(psy, POWER_SUPPLY_PROP_VOLTAGE_NOW, &data);
300 if (ret)
301 return ret;
302 vbatt = data.intval / 1000;
303
304 ret = psy->get_property(psy, POWER_SUPPLY_PROP_PRESENT, &data);
305 if (ret)
306 return ret;
307
308 mutex_lock(&info->lock);
309 info->present = data.intval;
310
311 dev_dbg(info->dev, "Entering FSM:%s, Charger:%s, Battery:%s, "
312 "Allowed:%d\n",
313 &fsm_state[info->state][0],
314 (info->online) ? "online" : "N/A",
315 (info->present) ? "present" : "N/A", info->allowed);
316 dev_dbg(info->dev, "set_charging_fsm:vbatt:%d(mV)\n", vbatt);
317
318 switch (info->state) {
319 case FSM_INIT:
320 if (info->online && info->present && info->allowed) {
321 if (vbatt < PRECHARGE_THRESHOLD) {
322 info->state = FSM_PRECHARGE;
323 start_precharge(info);
324 } else if (vbatt > DISCHARGE_THRESHOLD) {
325 info->state = FSM_DISCHARGE;
326 stop_charge(info, vbatt);
327 } else if (vbatt < DISCHARGE_THRESHOLD) {
328 info->state = FSM_FASTCHARGE;
329 start_fastcharge(info);
330 }
331 } else {
332 if (vbatt < POWEROFF_THRESHOLD) {
333 power_off_notification(info);
334 } else {
335 info->state = FSM_DISCHARGE;
336 stop_charge(info, vbatt);
337 }
338 }
339 break;
340 case FSM_PRECHARGE:
341 if (info->online && info->present && info->allowed) {
342 if (vbatt > PRECHARGE_THRESHOLD) {
343 info->state = FSM_FASTCHARGE;
344 start_fastcharge(info);
345 }
346 } else {
347 info->state = FSM_DISCHARGE;
348 stop_charge(info, vbatt);
349 }
350 break;
351 case FSM_FASTCHARGE:
352 if (info->online && info->present && info->allowed) {
353 if (vbatt < PRECHARGE_THRESHOLD) {
354 info->state = FSM_PRECHARGE;
355 start_precharge(info);
356 }
357 } else {
358 info->state = FSM_DISCHARGE;
359 stop_charge(info, vbatt);
360 }
361 break;
362 case FSM_DISCHARGE:
363 if (info->online && info->present && info->allowed) {
364 if (vbatt < PRECHARGE_THRESHOLD) {
365 info->state = FSM_PRECHARGE;
366 start_precharge(info);
367 } else if (vbatt < DISCHARGE_THRESHOLD) {
368 info->state = FSM_FASTCHARGE;
369 start_fastcharge(info);
370 }
371 } else {
372 if (vbatt < POWEROFF_THRESHOLD)
373 power_off_notification(info);
374 else if (vbatt > CHARGE_THRESHOLD && info->online)
375 set_vbatt_threshold(info, CHARGE_THRESHOLD, 0);
376 }
377 break;
378 default:
379 dev_warn(info->dev, "FSM meets wrong state:%d\n",
380 info->state);
381 break;
382 }
383 dev_dbg(info->dev,
384 "Out FSM:%s, Charger:%s, Battery:%s, Allowed:%d\n",
385 &fsm_state[info->state][0],
386 (info->online) ? "online" : "N/A",
387 (info->present) ? "present" : "N/A", info->allowed);
388 mutex_unlock(&info->lock);
389
390 return 0;
391}
392
393static irqreturn_t pm860x_charger_handler(int irq, void *data)
394{
395 struct pm860x_charger_info *info = data;
396 int ret;
397
398 mutex_lock(&info->lock);
399 ret = pm860x_reg_read(info->i2c, PM8607_STATUS_2);
400 if (ret < 0) {
401 mutex_unlock(&info->lock);
402 goto out;
403 }
404 if (ret & STATUS2_CHG) {
405 info->online = 1;
406 info->allowed = 1;
407 } else {
408 info->online = 0;
409 info->allowed = 0;
410 }
411 mutex_unlock(&info->lock);
412 dev_dbg(info->dev, "%s, Charger:%s, Allowed:%d\n", __func__,
413 (info->online) ? "online" : "N/A", info->allowed);
414
415 set_charging_fsm(info);
416
417 power_supply_changed(&info->usb);
418out:
419 return IRQ_HANDLED;
420}
421
422static irqreturn_t pm860x_temp_handler(int irq, void *data)
423{
424 struct power_supply *psy;
425 struct pm860x_charger_info *info = data;
426 union power_supply_propval temp;
427 int value;
428 int ret;
429
430 psy = power_supply_get_by_name(pm860x_supplied_to[0]);
431 if (!psy)
432 goto out;
433 ret = psy->get_property(psy, POWER_SUPPLY_PROP_TEMP, &temp);
434 if (ret)
435 goto out;
436 value = temp.intval / 10;
437
438 mutex_lock(&info->lock);
439 /* Temperature < -10 C or >40 C, Will not allow charge */
440 if (value < -10 || value > 40)
441 info->allowed = 0;
442 else
443 info->allowed = 1;
444 dev_dbg(info->dev, "%s, Allowed: %d\n", __func__, info->allowed);
445 mutex_unlock(&info->lock);
446
447 set_charging_fsm(info);
448out:
449 return IRQ_HANDLED;
450}
451
452static irqreturn_t pm860x_exception_handler(int irq, void *data)
453{
454 struct pm860x_charger_info *info = data;
455
456 mutex_lock(&info->lock);
457 info->allowed = 0;
458 mutex_unlock(&info->lock);
459 dev_dbg(info->dev, "%s, irq: %d\n", __func__, irq);
460
461 set_charging_fsm(info);
462 return IRQ_HANDLED;
463}
464
465static irqreturn_t pm860x_done_handler(int irq, void *data)
466{
467 struct pm860x_charger_info *info = data;
468 struct power_supply *psy;
469 union power_supply_propval val;
470 int ret;
471 int vbatt;
472
473 mutex_lock(&info->lock);
474 /* pre-charge done, will transimit to fast-charge stage */
475 if (info->state == FSM_PRECHARGE) {
476 info->allowed = 1;
477 goto out;
478 }
479 /*
480 * Fast charge done, delay to read
481 * the correct status of CHG_DET.
482 */
483 mdelay(5);
484 info->allowed = 0;
485 psy = power_supply_get_by_name(pm860x_supplied_to[0]);
486 if (!psy)
487 goto out;
488 ret = psy->get_property(psy, POWER_SUPPLY_PROP_VOLTAGE_NOW, &val);
489 if (ret)
490 goto out;
491 vbatt = val.intval / 1000;
492 /*
493 * CHG_DONE interrupt is faster than CHG_DET interrupt when
494 * plug in/out usb, So we can not rely on info->online, we
495 * need check pm8607 status register to check usb is online
496 * or not, then we can decide it is real charge done
497 * automatically or it is triggered by usb plug out;
498 */
499 ret = pm860x_reg_read(info->i2c, PM8607_STATUS_2);
500 if (ret < 0)
501 goto out;
502 if (vbatt > CHARGE_THRESHOLD && ret & STATUS2_CHG)
503 psy->set_property(psy, POWER_SUPPLY_PROP_CHARGE_FULL, &val);
504
505out:
506 mutex_unlock(&info->lock);
507 dev_dbg(info->dev, "%s, Allowed: %d\n", __func__, info->allowed);
508 set_charging_fsm(info);
509
510 return IRQ_HANDLED;
511}
512
513static irqreturn_t pm860x_vbattery_handler(int irq, void *data)
514{
515 struct pm860x_charger_info *info = data;
516
517 mutex_lock(&info->lock);
518
519 set_vbatt_threshold(info, 0, 0);
520
521 if (info->present && info->online)
522 info->allowed = 1;
523 else
524 info->allowed = 0;
525 mutex_unlock(&info->lock);
526 dev_dbg(info->dev, "%s, Allowed: %d\n", __func__, info->allowed);
527
528 set_charging_fsm(info);
529
530 return IRQ_HANDLED;
531}
532
533static irqreturn_t pm860x_vchg_handler(int irq, void *data)
534{
535 struct pm860x_charger_info *info = data;
536 int vchg = 0;
537
538 if (info->present)
539 goto out;
540
541 measure_vchg(info, &vchg);
542
543 mutex_lock(&info->lock);
544 if (!info->online) {
545 int status;
546 /* check if over-temp on pm8606 or not */
547 status = pm860x_reg_read(info->i2c_8606, PM8606_FLAGS);
548 if (status & OVER_TEMP_FLAG) {
549 /* clear over temp flag and set auto recover */
550 pm860x_set_bits(info->i2c_8606, PM8606_FLAGS,
551 OVER_TEMP_FLAG, OVER_TEMP_FLAG);
552 pm860x_set_bits(info->i2c_8606,
553 PM8606_VSYS,
554 OVTEMP_AUTORECOVER,
555 OVTEMP_AUTORECOVER);
556 dev_dbg(info->dev,
557 "%s, pm8606 over-temp occurred\n", __func__);
558 }
559 }
560
561 if (vchg > VCHG_NORMAL_CHECK) {
562 set_vchg_threshold(info, VCHG_OVP_LOW, 0);
563 info->allowed = 0;
564 dev_dbg(info->dev,
565 "%s,pm8607 over-vchg occurred,vchg = %dmv\n",
566 __func__, vchg);
567 } else if (vchg < VCHG_OVP_LOW) {
568 set_vchg_threshold(info, VCHG_NORMAL_LOW,
569 VCHG_NORMAL_HIGH);
570 info->allowed = 1;
571 dev_dbg(info->dev,
572 "%s,pm8607 over-vchg recover,vchg = %dmv\n",
573 __func__, vchg);
574 }
575 mutex_unlock(&info->lock);
576
577 dev_dbg(info->dev, "%s, Allowed: %d\n", __func__, info->allowed);
578 set_charging_fsm(info);
579out:
580 return IRQ_HANDLED;
581}
582
583static int pm860x_usb_get_prop(struct power_supply *psy,
584 enum power_supply_property psp,
585 union power_supply_propval *val)
586{
587 struct pm860x_charger_info *info =
588 dev_get_drvdata(psy->dev->parent);
589
590 switch (psp) {
591 case POWER_SUPPLY_PROP_STATUS:
592 if (info->state == FSM_FASTCHARGE ||
593 info->state == FSM_PRECHARGE)
594 val->intval = POWER_SUPPLY_STATUS_CHARGING;
595 else
596 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
597 break;
598 case POWER_SUPPLY_PROP_ONLINE:
599 val->intval = info->online;
600 break;
601 default:
602 return -ENODEV;
603 }
604 return 0;
605}
606
607static enum power_supply_property pm860x_usb_props[] = {
608 POWER_SUPPLY_PROP_STATUS,
609 POWER_SUPPLY_PROP_ONLINE,
610};
611
612static int pm860x_init_charger(struct pm860x_charger_info *info)
613{
614 int ret;
615
616 ret = pm860x_reg_read(info->i2c, PM8607_STATUS_2);
617 if (ret < 0)
618 return ret;
619
620 mutex_lock(&info->lock);
621 info->state = FSM_INIT;
622 if (ret & STATUS2_CHG) {
623 info->online = 1;
624 info->allowed = 1;
625 } else {
626 info->online = 0;
627 info->allowed = 0;
628 }
629 mutex_unlock(&info->lock);
630
631 set_charging_fsm(info);
632 return 0;
633}
634
635static struct pm860x_irq_desc {
636 const char *name;
637 irqreturn_t (*handler)(int irq, void *data);
638} pm860x_irq_descs[] = {
639 { "usb supply detect", pm860x_charger_handler },
640 { "charge done", pm860x_done_handler },
641 { "charge timeout", pm860x_exception_handler },
642 { "charge fault", pm860x_exception_handler },
643 { "temperature", pm860x_temp_handler },
644 { "vbatt", pm860x_vbattery_handler },
645 { "vchg", pm860x_vchg_handler },
646};
647
648static int pm860x_charger_probe(struct platform_device *pdev)
649{
650 struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent);
651 struct pm860x_charger_info *info;
652 int ret;
653 int count;
654 int i;
655 int j;
656
657 info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
658 if (!info)
659 return -ENOMEM;
660
661 count = pdev->num_resources;
662 for (i = 0, j = 0; i < count; i++) {
663 info->irq[j] = platform_get_irq(pdev, i);
664 if (info->irq[j] < 0)
665 continue;
666 j++;
667 }
668 info->irq_nums = j;
669
670 info->chip = chip;
671 info->i2c =
672 (chip->id == CHIP_PM8607) ? chip->client : chip->companion;
673 info->i2c_8606 =
674 (chip->id == CHIP_PM8607) ? chip->companion : chip->client;
675 if (!info->i2c_8606) {
676 dev_err(&pdev->dev, "Missed I2C address of 88PM8606!\n");
677 ret = -EINVAL;
678 goto out;
679 }
680 info->dev = &pdev->dev;
681
682 /* set init value for the case we are not using battery */
683 set_vchg_threshold(info, VCHG_NORMAL_LOW, VCHG_OVP_LOW);
684
685 mutex_init(&info->lock);
686 platform_set_drvdata(pdev, info);
687
688 info->usb.name = "usb";
689 info->usb.type = POWER_SUPPLY_TYPE_USB;
690 info->usb.supplied_to = pm860x_supplied_to;
691 info->usb.num_supplicants = ARRAY_SIZE(pm860x_supplied_to);
692 info->usb.properties = pm860x_usb_props;
693 info->usb.num_properties = ARRAY_SIZE(pm860x_usb_props);
694 info->usb.get_property = pm860x_usb_get_prop;
695 ret = power_supply_register(&pdev->dev, &info->usb);
696 if (ret)
697 goto out;
698
699 pm860x_init_charger(info);
700
701 for (i = 0; i < ARRAY_SIZE(info->irq); i++) {
702 ret = request_threaded_irq(info->irq[i], NULL,
703 pm860x_irq_descs[i].handler,
704 IRQF_ONESHOT, pm860x_irq_descs[i].name, info);
705 if (ret < 0) {
706 dev_err(chip->dev, "Failed to request IRQ: #%d: %d\n",
707 info->irq[i], ret);
708 goto out_irq;
709 }
710 }
711 return 0;
712
713out_irq:
714 while (--i >= 0)
715 free_irq(info->irq[i], info);
716out:
717 return ret;
718}
719
720static int pm860x_charger_remove(struct platform_device *pdev)
721{
722 struct pm860x_charger_info *info = platform_get_drvdata(pdev);
723 int i;
724
725 power_supply_unregister(&info->usb);
726 free_irq(info->irq[0], info);
727 for (i = 0; i < info->irq_nums; i++)
728 free_irq(info->irq[i], info);
729 return 0;
730}
731
732static struct platform_driver pm860x_charger_driver = {
733 .driver = {
734 .name = "88pm860x-charger",
735 .owner = THIS_MODULE,
736 },
737 .probe = pm860x_charger_probe,
738 .remove = pm860x_charger_remove,
739};
740module_platform_driver(pm860x_charger_driver);
741
742MODULE_DESCRIPTION("Marvell 88PM860x Charger driver");
743MODULE_LICENSE("GPL");
1/*
2 * Battery driver for Marvell 88PM860x PMIC
3 *
4 * Copyright (c) 2012 Marvell International Ltd.
5 * Author: Jett Zhou <jtzhou@marvell.com>
6 * Haojian Zhuang <haojian.zhuang@marvell.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12
13#include <linux/kernel.h>
14#include <linux/module.h>
15#include <linux/platform_device.h>
16#include <linux/slab.h>
17#include <linux/power_supply.h>
18#include <linux/mfd/88pm860x.h>
19#include <linux/delay.h>
20#include <linux/uaccess.h>
21#include <asm/div64.h>
22
23/* bit definitions of Status Query Interface 2 */
24#define STATUS2_CHG (1 << 2)
25
26/* bit definitions of Reset Out Register */
27#define RESET_SW_PD (1 << 7)
28
29/* bit definitions of PreReg 1 */
30#define PREREG1_90MA (0x0)
31#define PREREG1_180MA (0x1)
32#define PREREG1_450MA (0x4)
33#define PREREG1_540MA (0x5)
34#define PREREG1_1350MA (0xE)
35#define PREREG1_VSYS_4_5V (3 << 4)
36
37/* bit definitions of Charger Control 1 Register */
38#define CC1_MODE_OFF (0)
39#define CC1_MODE_PRECHARGE (1)
40#define CC1_MODE_FASTCHARGE (2)
41#define CC1_MODE_PULSECHARGE (3)
42#define CC1_ITERM_20MA (0 << 2)
43#define CC1_ITERM_60MA (2 << 2)
44#define CC1_VFCHG_4_2V (9 << 4)
45
46/* bit definitions of Charger Control 2 Register */
47#define CC2_ICHG_100MA (0x1)
48#define CC2_ICHG_500MA (0x9)
49#define CC2_ICHG_1000MA (0x13)
50
51/* bit definitions of Charger Control 3 Register */
52#define CC3_180MIN_TIMEOUT (0x6 << 4)
53#define CC3_270MIN_TIMEOUT (0x7 << 4)
54#define CC3_360MIN_TIMEOUT (0xA << 4)
55#define CC3_DISABLE_TIMEOUT (0xF << 4)
56
57/* bit definitions of Charger Control 4 Register */
58#define CC4_IPRE_40MA (7)
59#define CC4_VPCHG_3_2V (3 << 4)
60#define CC4_IFCHG_MON_EN (1 << 6)
61#define CC4_BTEMP_MON_EN (1 << 7)
62
63/* bit definitions of Charger Control 6 Register */
64#define CC6_BAT_OV_EN (1 << 2)
65#define CC6_BAT_UV_EN (1 << 3)
66#define CC6_UV_VBAT_SET (0x3 << 6) /* 2.8v */
67
68/* bit definitions of Charger Control 7 Register */
69#define CC7_BAT_REM_EN (1 << 3)
70#define CC7_IFSM_EN (1 << 7)
71
72/* bit definitions of Measurement Enable 1 Register */
73#define MEAS1_VBAT (1 << 0)
74
75/* bit definitions of Measurement Enable 3 Register */
76#define MEAS3_IBAT_EN (1 << 0)
77#define MEAS3_CC_EN (1 << 2)
78
79#define FSM_INIT 0
80#define FSM_DISCHARGE 1
81#define FSM_PRECHARGE 2
82#define FSM_FASTCHARGE 3
83
84#define PRECHARGE_THRESHOLD 3100
85#define POWEROFF_THRESHOLD 3400
86#define CHARGE_THRESHOLD 4000
87#define DISCHARGE_THRESHOLD 4180
88
89/* over-temperature on PM8606 setting */
90#define OVER_TEMP_FLAG (1 << 6)
91#define OVTEMP_AUTORECOVER (1 << 3)
92
93/* over-voltage protect on vchg setting mv */
94#define VCHG_NORMAL_LOW 4200
95#define VCHG_NORMAL_CHECK 5800
96#define VCHG_NORMAL_HIGH 6000
97#define VCHG_OVP_LOW 5500
98
99struct pm860x_charger_info {
100 struct pm860x_chip *chip;
101 struct i2c_client *i2c;
102 struct i2c_client *i2c_8606;
103 struct device *dev;
104
105 struct power_supply *usb;
106 struct mutex lock;
107 int irq_nums;
108 int irq[7];
109 unsigned state:3; /* fsm state */
110 unsigned online:1; /* usb charger */
111 unsigned present:1; /* battery present */
112 unsigned allowed:1;
113};
114
115static char *pm860x_supplied_to[] = {
116 "battery-monitor",
117};
118
119static int measure_vchg(struct pm860x_charger_info *info, int *data)
120{
121 unsigned char buf[2];
122 int ret = 0;
123
124 ret = pm860x_bulk_read(info->i2c, PM8607_VCHG_MEAS1, 2, buf);
125 if (ret < 0)
126 return ret;
127
128 *data = ((buf[0] & 0xff) << 4) | (buf[1] & 0x0f);
129 /* V_BATT_MEAS(mV) = value * 5 * 1.8 * 1000 / (2^12) */
130 *data = ((*data & 0xfff) * 9 * 125) >> 9;
131
132 dev_dbg(info->dev, "%s, vchg: %d mv\n", __func__, *data);
133
134 return ret;
135}
136
137static void set_vchg_threshold(struct pm860x_charger_info *info,
138 int min, int max)
139{
140 int data;
141
142 /* (tmp << 8) * / 5 / 1800 */
143 if (min <= 0)
144 data = 0;
145 else
146 data = (min << 5) / 1125;
147 pm860x_reg_write(info->i2c, PM8607_VCHG_LOWTH, data);
148 dev_dbg(info->dev, "VCHG_LOWTH:%dmv, 0x%x\n", min, data);
149
150 if (max <= 0)
151 data = 0xff;
152 else
153 data = (max << 5) / 1125;
154 pm860x_reg_write(info->i2c, PM8607_VCHG_HIGHTH, data);
155 dev_dbg(info->dev, "VCHG_HIGHTH:%dmv, 0x%x\n", max, data);
156
157}
158
159static void set_vbatt_threshold(struct pm860x_charger_info *info,
160 int min, int max)
161{
162 int data;
163
164 /* (tmp << 8) * 3 / 1800 */
165 if (min <= 0)
166 data = 0;
167 else
168 data = (min << 5) / 675;
169 pm860x_reg_write(info->i2c, PM8607_VBAT_LOWTH, data);
170 dev_dbg(info->dev, "VBAT Min:%dmv, LOWTH:0x%x\n", min, data);
171
172 if (max <= 0)
173 data = 0xff;
174 else
175 data = (max << 5) / 675;
176 pm860x_reg_write(info->i2c, PM8607_VBAT_HIGHTH, data);
177 dev_dbg(info->dev, "VBAT Max:%dmv, HIGHTH:0x%x\n", max, data);
178
179 return;
180}
181
182static int start_precharge(struct pm860x_charger_info *info)
183{
184 int ret;
185
186 dev_dbg(info->dev, "Start Pre-charging!\n");
187 set_vbatt_threshold(info, 0, 0);
188
189 ret = pm860x_reg_write(info->i2c_8606, PM8606_PREREGULATORA,
190 PREREG1_1350MA | PREREG1_VSYS_4_5V);
191 if (ret < 0)
192 goto out;
193 /* stop charging */
194 ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL1, 3,
195 CC1_MODE_OFF);
196 if (ret < 0)
197 goto out;
198 /* set 270 minutes timeout */
199 ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL3, (0xf << 4),
200 CC3_270MIN_TIMEOUT);
201 if (ret < 0)
202 goto out;
203 /* set precharge current, termination voltage, IBAT & TBAT monitor */
204 ret = pm860x_reg_write(info->i2c, PM8607_CHG_CTRL4,
205 CC4_IPRE_40MA | CC4_VPCHG_3_2V |
206 CC4_IFCHG_MON_EN | CC4_BTEMP_MON_EN);
207 if (ret < 0)
208 goto out;
209 ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL7,
210 CC7_BAT_REM_EN | CC7_IFSM_EN,
211 CC7_BAT_REM_EN | CC7_IFSM_EN);
212 if (ret < 0)
213 goto out;
214 /* trigger precharge */
215 ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL1, 3,
216 CC1_MODE_PRECHARGE);
217out:
218 return ret;
219}
220
221static int start_fastcharge(struct pm860x_charger_info *info)
222{
223 int ret;
224
225 dev_dbg(info->dev, "Start Fast-charging!\n");
226
227 /* set fastcharge termination current & voltage, disable charging */
228 ret = pm860x_reg_write(info->i2c, PM8607_CHG_CTRL1,
229 CC1_MODE_OFF | CC1_ITERM_60MA |
230 CC1_VFCHG_4_2V);
231 if (ret < 0)
232 goto out;
233 ret = pm860x_reg_write(info->i2c_8606, PM8606_PREREGULATORA,
234 PREREG1_540MA | PREREG1_VSYS_4_5V);
235 if (ret < 0)
236 goto out;
237 ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL2, 0x1f,
238 CC2_ICHG_500MA);
239 if (ret < 0)
240 goto out;
241 /* set 270 minutes timeout */
242 ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL3, (0xf << 4),
243 CC3_270MIN_TIMEOUT);
244 if (ret < 0)
245 goto out;
246 /* set IBAT & TBAT monitor */
247 ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL4,
248 CC4_IFCHG_MON_EN | CC4_BTEMP_MON_EN,
249 CC4_IFCHG_MON_EN | CC4_BTEMP_MON_EN);
250 if (ret < 0)
251 goto out;
252 ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL6,
253 CC6_BAT_OV_EN | CC6_BAT_UV_EN |
254 CC6_UV_VBAT_SET,
255 CC6_BAT_OV_EN | CC6_BAT_UV_EN |
256 CC6_UV_VBAT_SET);
257 if (ret < 0)
258 goto out;
259 ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL7,
260 CC7_BAT_REM_EN | CC7_IFSM_EN,
261 CC7_BAT_REM_EN | CC7_IFSM_EN);
262 if (ret < 0)
263 goto out;
264 /* launch fast-charge */
265 ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL1, 3,
266 CC1_MODE_FASTCHARGE);
267 /* vchg threshold setting */
268 set_vchg_threshold(info, VCHG_NORMAL_LOW, VCHG_NORMAL_HIGH);
269out:
270 return ret;
271}
272
273static void stop_charge(struct pm860x_charger_info *info, int vbatt)
274{
275 dev_dbg(info->dev, "Stop charging!\n");
276 pm860x_set_bits(info->i2c, PM8607_CHG_CTRL1, 3, CC1_MODE_OFF);
277 if (vbatt > CHARGE_THRESHOLD && info->online)
278 set_vbatt_threshold(info, CHARGE_THRESHOLD, 0);
279}
280
281static void power_off_notification(struct pm860x_charger_info *info)
282{
283 dev_dbg(info->dev, "Power-off notification!\n");
284}
285
286static int set_charging_fsm(struct pm860x_charger_info *info)
287{
288 struct power_supply *psy;
289 union power_supply_propval data;
290 unsigned char fsm_state[][16] = { "init", "discharge", "precharge",
291 "fastcharge",
292 };
293 int ret;
294 int vbatt;
295
296 psy = power_supply_get_by_name(pm860x_supplied_to[0]);
297 if (!psy)
298 return -EINVAL;
299 ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_VOLTAGE_NOW,
300 &data);
301 if (ret) {
302 power_supply_put(psy);
303 return ret;
304 }
305 vbatt = data.intval / 1000;
306
307 ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_PRESENT, &data);
308 if (ret) {
309 power_supply_put(psy);
310 return ret;
311 }
312 power_supply_put(psy);
313
314 mutex_lock(&info->lock);
315 info->present = data.intval;
316
317 dev_dbg(info->dev, "Entering FSM:%s, Charger:%s, Battery:%s, "
318 "Allowed:%d\n",
319 &fsm_state[info->state][0],
320 (info->online) ? "online" : "N/A",
321 (info->present) ? "present" : "N/A", info->allowed);
322 dev_dbg(info->dev, "set_charging_fsm:vbatt:%d(mV)\n", vbatt);
323
324 switch (info->state) {
325 case FSM_INIT:
326 if (info->online && info->present && info->allowed) {
327 if (vbatt < PRECHARGE_THRESHOLD) {
328 info->state = FSM_PRECHARGE;
329 start_precharge(info);
330 } else if (vbatt > DISCHARGE_THRESHOLD) {
331 info->state = FSM_DISCHARGE;
332 stop_charge(info, vbatt);
333 } else if (vbatt < DISCHARGE_THRESHOLD) {
334 info->state = FSM_FASTCHARGE;
335 start_fastcharge(info);
336 }
337 } else {
338 if (vbatt < POWEROFF_THRESHOLD) {
339 power_off_notification(info);
340 } else {
341 info->state = FSM_DISCHARGE;
342 stop_charge(info, vbatt);
343 }
344 }
345 break;
346 case FSM_PRECHARGE:
347 if (info->online && info->present && info->allowed) {
348 if (vbatt > PRECHARGE_THRESHOLD) {
349 info->state = FSM_FASTCHARGE;
350 start_fastcharge(info);
351 }
352 } else {
353 info->state = FSM_DISCHARGE;
354 stop_charge(info, vbatt);
355 }
356 break;
357 case FSM_FASTCHARGE:
358 if (info->online && info->present && info->allowed) {
359 if (vbatt < PRECHARGE_THRESHOLD) {
360 info->state = FSM_PRECHARGE;
361 start_precharge(info);
362 }
363 } else {
364 info->state = FSM_DISCHARGE;
365 stop_charge(info, vbatt);
366 }
367 break;
368 case FSM_DISCHARGE:
369 if (info->online && info->present && info->allowed) {
370 if (vbatt < PRECHARGE_THRESHOLD) {
371 info->state = FSM_PRECHARGE;
372 start_precharge(info);
373 } else if (vbatt < DISCHARGE_THRESHOLD) {
374 info->state = FSM_FASTCHARGE;
375 start_fastcharge(info);
376 }
377 } else {
378 if (vbatt < POWEROFF_THRESHOLD)
379 power_off_notification(info);
380 else if (vbatt > CHARGE_THRESHOLD && info->online)
381 set_vbatt_threshold(info, CHARGE_THRESHOLD, 0);
382 }
383 break;
384 default:
385 dev_warn(info->dev, "FSM meets wrong state:%d\n",
386 info->state);
387 break;
388 }
389 dev_dbg(info->dev,
390 "Out FSM:%s, Charger:%s, Battery:%s, Allowed:%d\n",
391 &fsm_state[info->state][0],
392 (info->online) ? "online" : "N/A",
393 (info->present) ? "present" : "N/A", info->allowed);
394 mutex_unlock(&info->lock);
395
396 return 0;
397}
398
399static irqreturn_t pm860x_charger_handler(int irq, void *data)
400{
401 struct pm860x_charger_info *info = data;
402 int ret;
403
404 mutex_lock(&info->lock);
405 ret = pm860x_reg_read(info->i2c, PM8607_STATUS_2);
406 if (ret < 0) {
407 mutex_unlock(&info->lock);
408 goto out;
409 }
410 if (ret & STATUS2_CHG) {
411 info->online = 1;
412 info->allowed = 1;
413 } else {
414 info->online = 0;
415 info->allowed = 0;
416 }
417 mutex_unlock(&info->lock);
418 dev_dbg(info->dev, "%s, Charger:%s, Allowed:%d\n", __func__,
419 (info->online) ? "online" : "N/A", info->allowed);
420
421 set_charging_fsm(info);
422
423 power_supply_changed(info->usb);
424out:
425 return IRQ_HANDLED;
426}
427
428static irqreturn_t pm860x_temp_handler(int irq, void *data)
429{
430 struct power_supply *psy;
431 struct pm860x_charger_info *info = data;
432 union power_supply_propval temp;
433 int value;
434 int ret;
435
436 psy = power_supply_get_by_name(pm860x_supplied_to[0]);
437 if (!psy)
438 return IRQ_HANDLED;
439 ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_TEMP, &temp);
440 if (ret)
441 goto out;
442 value = temp.intval / 10;
443
444 mutex_lock(&info->lock);
445 /* Temperature < -10 C or >40 C, Will not allow charge */
446 if (value < -10 || value > 40)
447 info->allowed = 0;
448 else
449 info->allowed = 1;
450 dev_dbg(info->dev, "%s, Allowed: %d\n", __func__, info->allowed);
451 mutex_unlock(&info->lock);
452
453 set_charging_fsm(info);
454out:
455 power_supply_put(psy);
456 return IRQ_HANDLED;
457}
458
459static irqreturn_t pm860x_exception_handler(int irq, void *data)
460{
461 struct pm860x_charger_info *info = data;
462
463 mutex_lock(&info->lock);
464 info->allowed = 0;
465 mutex_unlock(&info->lock);
466 dev_dbg(info->dev, "%s, irq: %d\n", __func__, irq);
467
468 set_charging_fsm(info);
469 return IRQ_HANDLED;
470}
471
472static irqreturn_t pm860x_done_handler(int irq, void *data)
473{
474 struct pm860x_charger_info *info = data;
475 struct power_supply *psy;
476 union power_supply_propval val;
477 int ret;
478 int vbatt;
479
480 mutex_lock(&info->lock);
481 /* pre-charge done, will transimit to fast-charge stage */
482 if (info->state == FSM_PRECHARGE) {
483 info->allowed = 1;
484 goto out;
485 }
486 /*
487 * Fast charge done, delay to read
488 * the correct status of CHG_DET.
489 */
490 mdelay(5);
491 info->allowed = 0;
492 psy = power_supply_get_by_name(pm860x_supplied_to[0]);
493 if (!psy)
494 goto out;
495 ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_VOLTAGE_NOW,
496 &val);
497 if (ret)
498 goto out_psy_put;
499 vbatt = val.intval / 1000;
500 /*
501 * CHG_DONE interrupt is faster than CHG_DET interrupt when
502 * plug in/out usb, So we can not rely on info->online, we
503 * need check pm8607 status register to check usb is online
504 * or not, then we can decide it is real charge done
505 * automatically or it is triggered by usb plug out;
506 */
507 ret = pm860x_reg_read(info->i2c, PM8607_STATUS_2);
508 if (ret < 0)
509 goto out_psy_put;
510 if (vbatt > CHARGE_THRESHOLD && ret & STATUS2_CHG)
511 power_supply_set_property(psy, POWER_SUPPLY_PROP_CHARGE_FULL,
512 &val);
513
514out_psy_put:
515 power_supply_put(psy);
516out:
517 mutex_unlock(&info->lock);
518 dev_dbg(info->dev, "%s, Allowed: %d\n", __func__, info->allowed);
519 set_charging_fsm(info);
520
521 return IRQ_HANDLED;
522}
523
524static irqreturn_t pm860x_vbattery_handler(int irq, void *data)
525{
526 struct pm860x_charger_info *info = data;
527
528 mutex_lock(&info->lock);
529
530 set_vbatt_threshold(info, 0, 0);
531
532 if (info->present && info->online)
533 info->allowed = 1;
534 else
535 info->allowed = 0;
536 mutex_unlock(&info->lock);
537 dev_dbg(info->dev, "%s, Allowed: %d\n", __func__, info->allowed);
538
539 set_charging_fsm(info);
540
541 return IRQ_HANDLED;
542}
543
544static irqreturn_t pm860x_vchg_handler(int irq, void *data)
545{
546 struct pm860x_charger_info *info = data;
547 int vchg = 0;
548
549 if (info->present)
550 goto out;
551
552 measure_vchg(info, &vchg);
553
554 mutex_lock(&info->lock);
555 if (!info->online) {
556 int status;
557 /* check if over-temp on pm8606 or not */
558 status = pm860x_reg_read(info->i2c_8606, PM8606_FLAGS);
559 if (status & OVER_TEMP_FLAG) {
560 /* clear over temp flag and set auto recover */
561 pm860x_set_bits(info->i2c_8606, PM8606_FLAGS,
562 OVER_TEMP_FLAG, OVER_TEMP_FLAG);
563 pm860x_set_bits(info->i2c_8606,
564 PM8606_VSYS,
565 OVTEMP_AUTORECOVER,
566 OVTEMP_AUTORECOVER);
567 dev_dbg(info->dev,
568 "%s, pm8606 over-temp occurred\n", __func__);
569 }
570 }
571
572 if (vchg > VCHG_NORMAL_CHECK) {
573 set_vchg_threshold(info, VCHG_OVP_LOW, 0);
574 info->allowed = 0;
575 dev_dbg(info->dev,
576 "%s,pm8607 over-vchg occurred,vchg = %dmv\n",
577 __func__, vchg);
578 } else if (vchg < VCHG_OVP_LOW) {
579 set_vchg_threshold(info, VCHG_NORMAL_LOW,
580 VCHG_NORMAL_HIGH);
581 info->allowed = 1;
582 dev_dbg(info->dev,
583 "%s,pm8607 over-vchg recover,vchg = %dmv\n",
584 __func__, vchg);
585 }
586 mutex_unlock(&info->lock);
587
588 dev_dbg(info->dev, "%s, Allowed: %d\n", __func__, info->allowed);
589 set_charging_fsm(info);
590out:
591 return IRQ_HANDLED;
592}
593
594static int pm860x_usb_get_prop(struct power_supply *psy,
595 enum power_supply_property psp,
596 union power_supply_propval *val)
597{
598 struct pm860x_charger_info *info = power_supply_get_drvdata(psy);
599
600 switch (psp) {
601 case POWER_SUPPLY_PROP_STATUS:
602 if (info->state == FSM_FASTCHARGE ||
603 info->state == FSM_PRECHARGE)
604 val->intval = POWER_SUPPLY_STATUS_CHARGING;
605 else
606 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
607 break;
608 case POWER_SUPPLY_PROP_ONLINE:
609 val->intval = info->online;
610 break;
611 default:
612 return -ENODEV;
613 }
614 return 0;
615}
616
617static enum power_supply_property pm860x_usb_props[] = {
618 POWER_SUPPLY_PROP_STATUS,
619 POWER_SUPPLY_PROP_ONLINE,
620};
621
622static int pm860x_init_charger(struct pm860x_charger_info *info)
623{
624 int ret;
625
626 ret = pm860x_reg_read(info->i2c, PM8607_STATUS_2);
627 if (ret < 0)
628 return ret;
629
630 mutex_lock(&info->lock);
631 info->state = FSM_INIT;
632 if (ret & STATUS2_CHG) {
633 info->online = 1;
634 info->allowed = 1;
635 } else {
636 info->online = 0;
637 info->allowed = 0;
638 }
639 mutex_unlock(&info->lock);
640
641 set_charging_fsm(info);
642 return 0;
643}
644
645static struct pm860x_irq_desc {
646 const char *name;
647 irqreturn_t (*handler)(int irq, void *data);
648} pm860x_irq_descs[] = {
649 { "usb supply detect", pm860x_charger_handler },
650 { "charge done", pm860x_done_handler },
651 { "charge timeout", pm860x_exception_handler },
652 { "charge fault", pm860x_exception_handler },
653 { "temperature", pm860x_temp_handler },
654 { "vbatt", pm860x_vbattery_handler },
655 { "vchg", pm860x_vchg_handler },
656};
657
658static const struct power_supply_desc pm860x_charger_desc = {
659 .name = "usb",
660 .type = POWER_SUPPLY_TYPE_USB,
661 .properties = pm860x_usb_props,
662 .num_properties = ARRAY_SIZE(pm860x_usb_props),
663 .get_property = pm860x_usb_get_prop,
664};
665
666static int pm860x_charger_probe(struct platform_device *pdev)
667{
668 struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent);
669 struct power_supply_config psy_cfg = {};
670 struct pm860x_charger_info *info;
671 int ret;
672 int count;
673 int i;
674 int j;
675
676 info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
677 if (!info)
678 return -ENOMEM;
679
680 count = pdev->num_resources;
681 for (i = 0, j = 0; i < count; i++) {
682 info->irq[j] = platform_get_irq(pdev, i);
683 if (info->irq[j] < 0)
684 continue;
685 j++;
686 }
687 info->irq_nums = j;
688
689 info->chip = chip;
690 info->i2c =
691 (chip->id == CHIP_PM8607) ? chip->client : chip->companion;
692 info->i2c_8606 =
693 (chip->id == CHIP_PM8607) ? chip->companion : chip->client;
694 if (!info->i2c_8606) {
695 dev_err(&pdev->dev, "Missed I2C address of 88PM8606!\n");
696 ret = -EINVAL;
697 goto out;
698 }
699 info->dev = &pdev->dev;
700
701 /* set init value for the case we are not using battery */
702 set_vchg_threshold(info, VCHG_NORMAL_LOW, VCHG_OVP_LOW);
703
704 mutex_init(&info->lock);
705 platform_set_drvdata(pdev, info);
706
707 psy_cfg.drv_data = info;
708 psy_cfg.supplied_to = pm860x_supplied_to;
709 psy_cfg.num_supplicants = ARRAY_SIZE(pm860x_supplied_to);
710 info->usb = power_supply_register(&pdev->dev, &pm860x_charger_desc,
711 &psy_cfg);
712 if (IS_ERR(info->usb)) {
713 ret = PTR_ERR(info->usb);
714 goto out;
715 }
716
717 pm860x_init_charger(info);
718
719 for (i = 0; i < ARRAY_SIZE(info->irq); i++) {
720 ret = request_threaded_irq(info->irq[i], NULL,
721 pm860x_irq_descs[i].handler,
722 IRQF_ONESHOT, pm860x_irq_descs[i].name, info);
723 if (ret < 0) {
724 dev_err(chip->dev, "Failed to request IRQ: #%d: %d\n",
725 info->irq[i], ret);
726 goto out_irq;
727 }
728 }
729 return 0;
730
731out_irq:
732 power_supply_unregister(info->usb);
733 while (--i >= 0)
734 free_irq(info->irq[i], info);
735out:
736 return ret;
737}
738
739static int pm860x_charger_remove(struct platform_device *pdev)
740{
741 struct pm860x_charger_info *info = platform_get_drvdata(pdev);
742 int i;
743
744 power_supply_unregister(info->usb);
745 for (i = 0; i < info->irq_nums; i++)
746 free_irq(info->irq[i], info);
747 return 0;
748}
749
750static struct platform_driver pm860x_charger_driver = {
751 .driver = {
752 .name = "88pm860x-charger",
753 },
754 .probe = pm860x_charger_probe,
755 .remove = pm860x_charger_remove,
756};
757module_platform_driver(pm860x_charger_driver);
758
759MODULE_DESCRIPTION("Marvell 88PM860x Charger driver");
760MODULE_LICENSE("GPL");