tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Copyright 2012 ST Ericsson.
3 *
4 * Power supply driver for ST Ericsson pm2xxx_charger charger
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10
11#include <linux/init.h>
12#include <linux/module.h>
13#include <linux/device.h>
14#include <linux/interrupt.h>
15#include <linux/delay.h>
16#include <linux/slab.h>
17#include <linux/platform_device.h>
18#include <linux/power_supply.h>
19#include <linux/regulator/consumer.h>
20#include <linux/err.h>
21#include <linux/i2c.h>
22#include <linux/workqueue.h>
23#include <linux/mfd/abx500/ab8500.h>
24#include <linux/mfd/abx500/ab8500-bm.h>
25#include <linux/mfd/abx500/ux500_chargalg.h>
26#include <linux/pm2301_charger.h>
27#include <linux/gpio.h>
28#include <linux/pm_runtime.h>
29#include <linux/pm.h>
30
31#include "pm2301_charger.h"
32
33#define to_pm2xxx_charger_ac_device_info(x) container_of((x), \
34 struct pm2xxx_charger, ac_chg)
35#define SLEEP_MIN 50
36#define SLEEP_MAX 100
37#define PM2XXX_AUTOSUSPEND_DELAY 500
38
39static int pm2xxx_interrupt_registers[] = {
40 PM2XXX_REG_INT1,
41 PM2XXX_REG_INT2,
42 PM2XXX_REG_INT3,
43 PM2XXX_REG_INT4,
44 PM2XXX_REG_INT5,
45 PM2XXX_REG_INT6,
46};
47
48static enum power_supply_property pm2xxx_charger_ac_props[] = {
49 POWER_SUPPLY_PROP_HEALTH,
50 POWER_SUPPLY_PROP_PRESENT,
51 POWER_SUPPLY_PROP_ONLINE,
52 POWER_SUPPLY_PROP_VOLTAGE_AVG,
53};
54
55static int pm2xxx_charger_voltage_map[] = {
56 3500,
57 3525,
58 3550,
59 3575,
60 3600,
61 3625,
62 3650,
63 3675,
64 3700,
65 3725,
66 3750,
67 3775,
68 3800,
69 3825,
70 3850,
71 3875,
72 3900,
73 3925,
74 3950,
75 3975,
76 4000,
77 4025,
78 4050,
79 4075,
80 4100,
81 4125,
82 4150,
83 4175,
84 4200,
85 4225,
86 4250,
87 4275,
88 4300,
89};
90
91static int pm2xxx_charger_current_map[] = {
92 200,
93 200,
94 400,
95 600,
96 800,
97 1000,
98 1200,
99 1400,
100 1600,
101 1800,
102 2000,
103 2200,
104 2400,
105 2600,
106 2800,
107 3000,
108};
109
110static const struct i2c_device_id pm2xxx_ident[] = {
111 { "pm2301", 0 },
112 { }
113};
114
115static void set_lpn_pin(struct pm2xxx_charger *pm2)
116{
117 if (!pm2->ac.charger_connected && gpio_is_valid(pm2->lpn_pin)) {
118 gpio_set_value(pm2->lpn_pin, 1);
119 usleep_range(SLEEP_MIN, SLEEP_MAX);
120 }
121}
122
123static void clear_lpn_pin(struct pm2xxx_charger *pm2)
124{
125 if (!pm2->ac.charger_connected && gpio_is_valid(pm2->lpn_pin))
126 gpio_set_value(pm2->lpn_pin, 0);
127}
128
129static int pm2xxx_reg_read(struct pm2xxx_charger *pm2, int reg, u8 *val)
130{
131 int ret;
132
133 /* wake up the device */
134 pm_runtime_get_sync(pm2->dev);
135
136 ret = i2c_smbus_read_i2c_block_data(pm2->config.pm2xxx_i2c, reg,
137 1, val);
138 if (ret < 0)
139 dev_err(pm2->dev, "Error reading register at 0x%x\n", reg);
140 else
141 ret = 0;
142
143 pm_runtime_put_sync(pm2->dev);
144
145 return ret;
146}
147
148static int pm2xxx_reg_write(struct pm2xxx_charger *pm2, int reg, u8 val)
149{
150 int ret;
151
152 /* wake up the device */
153 pm_runtime_get_sync(pm2->dev);
154
155 ret = i2c_smbus_write_i2c_block_data(pm2->config.pm2xxx_i2c, reg,
156 1, &val);
157 if (ret < 0)
158 dev_err(pm2->dev, "Error writing register at 0x%x\n", reg);
159 else
160 ret = 0;
161
162 pm_runtime_put_sync(pm2->dev);
163
164 return ret;
165}
166
167static int pm2xxx_charging_enable_mngt(struct pm2xxx_charger *pm2)
168{
169 int ret;
170
171 /* Enable charging */
172 ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG2,
173 (PM2XXX_CH_AUTO_RESUME_EN | PM2XXX_CHARGER_ENA));
174
175 return ret;
176}
177
178static int pm2xxx_charging_disable_mngt(struct pm2xxx_charger *pm2)
179{
180 int ret;
181
182 /* Disable SW EOC ctrl */
183 ret = pm2xxx_reg_write(pm2, PM2XXX_SW_CTRL_REG, PM2XXX_SWCTRL_HW);
184 if (ret < 0) {
185 dev_err(pm2->dev, "%s pm2xxx write failed\n", __func__);
186 return ret;
187 }
188
189 /* Disable charging */
190 ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG2,
191 (PM2XXX_CH_AUTO_RESUME_DIS | PM2XXX_CHARGER_DIS));
192 if (ret < 0) {
193 dev_err(pm2->dev, "%s pm2xxx write failed\n", __func__);
194 return ret;
195 }
196
197 return 0;
198}
199
200static int pm2xxx_charger_batt_therm_mngt(struct pm2xxx_charger *pm2, int val)
201{
202 queue_work(pm2->charger_wq, &pm2->check_main_thermal_prot_work);
203
204 return 0;
205}
206
207
208int pm2xxx_charger_die_therm_mngt(struct pm2xxx_charger *pm2, int val)
209{
210 queue_work(pm2->charger_wq, &pm2->check_main_thermal_prot_work);
211
212 return 0;
213}
214
215static int pm2xxx_charger_ovv_mngt(struct pm2xxx_charger *pm2, int val)
216{
217 dev_err(pm2->dev, "Overvoltage detected\n");
218 pm2->flags.ovv = true;
219 power_supply_changed(&pm2->ac_chg.psy);
220
221 /* Schedule a new HW failure check */
222 queue_delayed_work(pm2->charger_wq, &pm2->check_hw_failure_work, 0);
223
224 return 0;
225}
226
227static int pm2xxx_charger_wd_exp_mngt(struct pm2xxx_charger *pm2, int val)
228{
229 dev_dbg(pm2->dev , "20 minutes watchdog expired\n");
230
231 pm2->ac.wd_expired = true;
232 power_supply_changed(&pm2->ac_chg.psy);
233
234 return 0;
235}
236
237static int pm2xxx_charger_vbat_lsig_mngt(struct pm2xxx_charger *pm2, int val)
238{
239 int ret;
240
241 switch (val) {
242 case PM2XXX_INT1_ITVBATLOWR:
243 dev_dbg(pm2->dev, "VBAT grows above VBAT_LOW level\n");
244 /* Enable SW EOC ctrl */
245 ret = pm2xxx_reg_write(pm2, PM2XXX_SW_CTRL_REG,
246 PM2XXX_SWCTRL_SW);
247 if (ret < 0) {
248 dev_err(pm2->dev, "%s pm2xxx write failed\n", __func__);
249 return ret;
250 }
251 break;
252
253 case PM2XXX_INT1_ITVBATLOWF:
254 dev_dbg(pm2->dev, "VBAT drops below VBAT_LOW level\n");
255 /* Disable SW EOC ctrl */
256 ret = pm2xxx_reg_write(pm2, PM2XXX_SW_CTRL_REG,
257 PM2XXX_SWCTRL_HW);
258 if (ret < 0) {
259 dev_err(pm2->dev, "%s pm2xxx write failed\n", __func__);
260 return ret;
261 }
262 break;
263
264 default:
265 dev_err(pm2->dev, "Unknown VBAT level\n");
266 }
267
268 return 0;
269}
270
271static int pm2xxx_charger_bat_disc_mngt(struct pm2xxx_charger *pm2, int val)
272{
273 dev_dbg(pm2->dev, "battery disconnected\n");
274
275 return 0;
276}
277
278static int pm2xxx_charger_detection(struct pm2xxx_charger *pm2, u8 *val)
279{
280 int ret;
281
282 ret = pm2xxx_reg_read(pm2, PM2XXX_SRCE_REG_INT2, val);
283
284 if (ret < 0) {
285 dev_err(pm2->dev, "Charger detection failed\n");
286 goto out;
287 }
288
289 *val &= (PM2XXX_INT2_S_ITVPWR1PLUG | PM2XXX_INT2_S_ITVPWR2PLUG);
290
291out:
292 return ret;
293}
294
295static int pm2xxx_charger_itv_pwr_plug_mngt(struct pm2xxx_charger *pm2, int val)
296{
297
298 int ret;
299 u8 read_val;
300
301 /*
302 * Since we can't be sure that the events are received
303 * synchronously, we have the check if the main charger is
304 * connected by reading the interrupt source register.
305 */
306 ret = pm2xxx_charger_detection(pm2, &read_val);
307
308 if ((ret == 0) && read_val) {
309 pm2->ac.charger_connected = 1;
310 pm2->ac_conn = true;
311 queue_work(pm2->charger_wq, &pm2->ac_work);
312 }
313
314
315 return ret;
316}
317
318static int pm2xxx_charger_itv_pwr_unplug_mngt(struct pm2xxx_charger *pm2,
319 int val)
320{
321 pm2->ac.charger_connected = 0;
322 queue_work(pm2->charger_wq, &pm2->ac_work);
323
324 return 0;
325}
326
327static int pm2_int_reg0(void *pm2_data, int val)
328{
329 struct pm2xxx_charger *pm2 = pm2_data;
330 int ret = 0;
331
332 if (val & PM2XXX_INT1_ITVBATLOWR) {
333 ret = pm2xxx_charger_vbat_lsig_mngt(pm2,
334 PM2XXX_INT1_ITVBATLOWR);
335 if (ret < 0)
336 goto out;
337 }
338
339 if (val & PM2XXX_INT1_ITVBATLOWF) {
340 ret = pm2xxx_charger_vbat_lsig_mngt(pm2,
341 PM2XXX_INT1_ITVBATLOWF);
342 if (ret < 0)
343 goto out;
344 }
345
346 if (val & PM2XXX_INT1_ITVBATDISCONNECT) {
347 ret = pm2xxx_charger_bat_disc_mngt(pm2,
348 PM2XXX_INT1_ITVBATDISCONNECT);
349 if (ret < 0)
350 goto out;
351 }
352out:
353 return ret;
354}
355
356static int pm2_int_reg1(void *pm2_data, int val)
357{
358 struct pm2xxx_charger *pm2 = pm2_data;
359 int ret = 0;
360
361 if (val & (PM2XXX_INT2_ITVPWR1PLUG | PM2XXX_INT2_ITVPWR2PLUG)) {
362 dev_dbg(pm2->dev , "Main charger plugged\n");
363 ret = pm2xxx_charger_itv_pwr_plug_mngt(pm2, val &
364 (PM2XXX_INT2_ITVPWR1PLUG | PM2XXX_INT2_ITVPWR2PLUG));
365 }
366
367 if (val &
368 (PM2XXX_INT2_ITVPWR1UNPLUG | PM2XXX_INT2_ITVPWR2UNPLUG)) {
369 dev_dbg(pm2->dev , "Main charger unplugged\n");
370 ret = pm2xxx_charger_itv_pwr_unplug_mngt(pm2, val &
371 (PM2XXX_INT2_ITVPWR1UNPLUG |
372 PM2XXX_INT2_ITVPWR2UNPLUG));
373 }
374
375 return ret;
376}
377
378static int pm2_int_reg2(void *pm2_data, int val)
379{
380 struct pm2xxx_charger *pm2 = pm2_data;
381 int ret = 0;
382
383 if (val & PM2XXX_INT3_ITAUTOTIMEOUTWD)
384 ret = pm2xxx_charger_wd_exp_mngt(pm2, val);
385
386 if (val & (PM2XXX_INT3_ITCHPRECHARGEWD |
387 PM2XXX_INT3_ITCHCCWD | PM2XXX_INT3_ITCHCVWD)) {
388 dev_dbg(pm2->dev,
389 "Watchdog occured for precharge, CC and CV charge\n");
390 }
391
392 return ret;
393}
394
395static int pm2_int_reg3(void *pm2_data, int val)
396{
397 struct pm2xxx_charger *pm2 = pm2_data;
398 int ret = 0;
399
400 if (val & (PM2XXX_INT4_ITCHARGINGON)) {
401 dev_dbg(pm2->dev ,
402 "chargind operation has started\n");
403 }
404
405 if (val & (PM2XXX_INT4_ITVRESUME)) {
406 dev_dbg(pm2->dev,
407 "battery discharged down to VResume threshold\n");
408 }
409
410 if (val & (PM2XXX_INT4_ITBATTFULL)) {
411 dev_dbg(pm2->dev , "battery fully detected\n");
412 }
413
414 if (val & (PM2XXX_INT4_ITCVPHASE)) {
415 dev_dbg(pm2->dev, "CV phase enter with 0.5C charging\n");
416 }
417
418 if (val & (PM2XXX_INT4_ITVPWR2OVV | PM2XXX_INT4_ITVPWR1OVV)) {
419 pm2->failure_case = VPWR_OVV;
420 ret = pm2xxx_charger_ovv_mngt(pm2, val &
421 (PM2XXX_INT4_ITVPWR2OVV | PM2XXX_INT4_ITVPWR1OVV));
422 dev_dbg(pm2->dev, "VPWR/VSYSTEM overvoltage detected\n");
423 }
424
425 if (val & (PM2XXX_INT4_S_ITBATTEMPCOLD |
426 PM2XXX_INT4_S_ITBATTEMPHOT)) {
427 ret = pm2xxx_charger_batt_therm_mngt(pm2, val &
428 (PM2XXX_INT4_S_ITBATTEMPCOLD |
429 PM2XXX_INT4_S_ITBATTEMPHOT));
430 dev_dbg(pm2->dev, "BTEMP is too Low/High\n");
431 }
432
433 return ret;
434}
435
436static int pm2_int_reg4(void *pm2_data, int val)
437{
438 struct pm2xxx_charger *pm2 = pm2_data;
439 int ret = 0;
440
441 if (val & PM2XXX_INT5_ITVSYSTEMOVV) {
442 pm2->failure_case = VSYSTEM_OVV;
443 ret = pm2xxx_charger_ovv_mngt(pm2, val &
444 PM2XXX_INT5_ITVSYSTEMOVV);
445 dev_dbg(pm2->dev, "VSYSTEM overvoltage detected\n");
446 }
447
448 if (val & (PM2XXX_INT5_ITTHERMALWARNINGFALL |
449 PM2XXX_INT5_ITTHERMALWARNINGRISE |
450 PM2XXX_INT5_ITTHERMALSHUTDOWNFALL |
451 PM2XXX_INT5_ITTHERMALSHUTDOWNRISE)) {
452 dev_dbg(pm2->dev, "BTEMP die temperature is too Low/High\n");
453 ret = pm2xxx_charger_die_therm_mngt(pm2, val &
454 (PM2XXX_INT5_ITTHERMALWARNINGFALL |
455 PM2XXX_INT5_ITTHERMALWARNINGRISE |
456 PM2XXX_INT5_ITTHERMALSHUTDOWNFALL |
457 PM2XXX_INT5_ITTHERMALSHUTDOWNRISE));
458 }
459
460 return ret;
461}
462
463static int pm2_int_reg5(void *pm2_data, int val)
464{
465 struct pm2xxx_charger *pm2 = pm2_data;
466 int ret = 0;
467
468 if (val & (PM2XXX_INT6_ITVPWR2DROP | PM2XXX_INT6_ITVPWR1DROP)) {
469 dev_dbg(pm2->dev, "VMPWR drop to VBAT level\n");
470 }
471
472 if (val & (PM2XXX_INT6_ITVPWR2VALIDRISE |
473 PM2XXX_INT6_ITVPWR1VALIDRISE |
474 PM2XXX_INT6_ITVPWR2VALIDFALL |
475 PM2XXX_INT6_ITVPWR1VALIDFALL)) {
476 dev_dbg(pm2->dev, "Falling/Rising edge on WPWR1/2\n");
477 }
478
479 return ret;
480}
481
482static irqreturn_t pm2xxx_irq_int(int irq, void *data)
483{
484 struct pm2xxx_charger *pm2 = data;
485 struct pm2xxx_interrupts *interrupt = pm2->pm2_int;
486 int i;
487
488 /* wake up the device */
489 pm_runtime_get_sync(pm2->dev);
490
491 do {
492 for (i = 0; i < PM2XXX_NUM_INT_REG; i++) {
493 pm2xxx_reg_read(pm2,
494 pm2xxx_interrupt_registers[i],
495 &(interrupt->reg[i]));
496
497 if (interrupt->reg[i] > 0)
498 interrupt->handler[i](pm2, interrupt->reg[i]);
499 }
500 } while (gpio_get_value(pm2->pdata->gpio_irq_number) == 0);
501
502 pm_runtime_mark_last_busy(pm2->dev);
503 pm_runtime_put_autosuspend(pm2->dev);
504
505 return IRQ_HANDLED;
506}
507
508static int pm2xxx_charger_get_ac_cv(struct pm2xxx_charger *pm2)
509{
510 int ret = 0;
511 u8 val;
512
513 if (pm2->ac.charger_connected && pm2->ac.charger_online) {
514
515 ret = pm2xxx_reg_read(pm2, PM2XXX_SRCE_REG_INT4, &val);
516 if (ret < 0) {
517 dev_err(pm2->dev, "%s pm2xxx read failed\n", __func__);
518 goto out;
519 }
520
521 if (val & PM2XXX_INT4_S_ITCVPHASE)
522 ret = PM2XXX_CONST_VOLT;
523 else
524 ret = PM2XXX_CONST_CURR;
525 }
526out:
527 return ret;
528}
529
530static int pm2xxx_current_to_regval(int curr)
531{
532 int i;
533
534 if (curr < pm2xxx_charger_current_map[0])
535 return 0;
536
537 for (i = 1; i < ARRAY_SIZE(pm2xxx_charger_current_map); i++) {
538 if (curr < pm2xxx_charger_current_map[i])
539 return (i - 1);
540 }
541
542 i = ARRAY_SIZE(pm2xxx_charger_current_map) - 1;
543 if (curr == pm2xxx_charger_current_map[i])
544 return i;
545 else
546 return -EINVAL;
547}
548
549static int pm2xxx_voltage_to_regval(int curr)
550{
551 int i;
552
553 if (curr < pm2xxx_charger_voltage_map[0])
554 return 0;
555
556 for (i = 1; i < ARRAY_SIZE(pm2xxx_charger_voltage_map); i++) {
557 if (curr < pm2xxx_charger_voltage_map[i])
558 return i - 1;
559 }
560
561 i = ARRAY_SIZE(pm2xxx_charger_voltage_map) - 1;
562 if (curr == pm2xxx_charger_voltage_map[i])
563 return i;
564 else
565 return -EINVAL;
566}
567
568static int pm2xxx_charger_update_charger_current(struct ux500_charger *charger,
569 int ich_out)
570{
571 int ret;
572 int curr_index;
573 struct pm2xxx_charger *pm2;
574 u8 val;
575
576 if (charger->psy.type == POWER_SUPPLY_TYPE_MAINS)
577 pm2 = to_pm2xxx_charger_ac_device_info(charger);
578 else
579 return -ENXIO;
580
581 curr_index = pm2xxx_current_to_regval(ich_out);
582 if (curr_index < 0) {
583 dev_err(pm2->dev,
584 "Charger current too high, charging not started\n");
585 return -ENXIO;
586 }
587
588 ret = pm2xxx_reg_read(pm2, PM2XXX_BATT_CTRL_REG6, &val);
589 if (ret >= 0) {
590 val &= ~PM2XXX_DIR_CH_CC_CURRENT_MASK;
591 val |= curr_index;
592 ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG6, val);
593 if (ret < 0) {
594 dev_err(pm2->dev,
595 "%s write failed\n", __func__);
596 }
597 }
598 else
599 dev_err(pm2->dev, "%s read failed\n", __func__);
600
601 return ret;
602}
603
604static int pm2xxx_charger_ac_get_property(struct power_supply *psy,
605 enum power_supply_property psp,
606 union power_supply_propval *val)
607{
608 struct pm2xxx_charger *pm2;
609
610 pm2 = to_pm2xxx_charger_ac_device_info(psy_to_ux500_charger(psy));
611
612 switch (psp) {
613 case POWER_SUPPLY_PROP_HEALTH:
614 if (pm2->flags.mainextchnotok)
615 val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
616 else if (pm2->ac.wd_expired)
617 val->intval = POWER_SUPPLY_HEALTH_DEAD;
618 else if (pm2->flags.main_thermal_prot)
619 val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
620 else if (pm2->flags.ovv)
621 val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
622 else
623 val->intval = POWER_SUPPLY_HEALTH_GOOD;
624 break;
625 case POWER_SUPPLY_PROP_ONLINE:
626 val->intval = pm2->ac.charger_online;
627 break;
628 case POWER_SUPPLY_PROP_PRESENT:
629 val->intval = pm2->ac.charger_connected;
630 break;
631 case POWER_SUPPLY_PROP_VOLTAGE_AVG:
632 pm2->ac.cv_active = pm2xxx_charger_get_ac_cv(pm2);
633 val->intval = pm2->ac.cv_active;
634 break;
635 default:
636 return -EINVAL;
637 }
638 return 0;
639}
640
641static int pm2xxx_charging_init(struct pm2xxx_charger *pm2)
642{
643 int ret = 0;
644
645 /* enable CC and CV watchdog */
646 ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG3,
647 (PM2XXX_CH_WD_CV_PHASE_60MIN | PM2XXX_CH_WD_CC_PHASE_60MIN));
648 if( ret < 0)
649 return ret;
650
651 /* enable precharge watchdog */
652 ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG4,
653 PM2XXX_CH_WD_PRECH_PHASE_60MIN);
654
655 /* Disable auto timeout */
656 ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG5,
657 PM2XXX_CH_WD_AUTO_TIMEOUT_20MIN);
658
659 /*
660 * EOC current level = 100mA
661 * Precharge current level = 100mA
662 * CC current level = 1000mA
663 */
664 ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG6,
665 (PM2XXX_DIR_CH_CC_CURRENT_1000MA |
666 PM2XXX_CH_PRECH_CURRENT_100MA |
667 PM2XXX_CH_EOC_CURRENT_100MA));
668
669 /*
670 * recharge threshold = 3.8V
671 * Precharge to CC threshold = 2.9V
672 */
673 ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG7,
674 (PM2XXX_CH_PRECH_VOL_2_9 | PM2XXX_CH_VRESUME_VOL_3_8));
675
676 /* float voltage charger level = 4.2V */
677 ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG8,
678 PM2XXX_CH_VOLT_4_2);
679
680 /* Voltage drop between VBAT and VSYS in HW charging = 300mV */
681 ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG9,
682 (PM2XXX_CH_150MV_DROP_300MV | PM2XXX_CHARCHING_INFO_DIS |
683 PM2XXX_CH_CC_REDUCED_CURRENT_IDENT |
684 PM2XXX_CH_CC_MODEDROP_DIS));
685
686 /* Input charger level of over voltage = 10V */
687 ret = pm2xxx_reg_write(pm2, PM2XXX_INP_VOLT_VPWR2,
688 PM2XXX_VPWR2_OVV_10);
689 ret = pm2xxx_reg_write(pm2, PM2XXX_INP_VOLT_VPWR1,
690 PM2XXX_VPWR1_OVV_10);
691
692 /* Input charger drop */
693 ret = pm2xxx_reg_write(pm2, PM2XXX_INP_DROP_VPWR2,
694 (PM2XXX_VPWR2_HW_OPT_DIS | PM2XXX_VPWR2_VALID_DIS |
695 PM2XXX_VPWR2_DROP_DIS));
696 ret = pm2xxx_reg_write(pm2, PM2XXX_INP_DROP_VPWR1,
697 (PM2XXX_VPWR1_HW_OPT_DIS | PM2XXX_VPWR1_VALID_DIS |
698 PM2XXX_VPWR1_DROP_DIS));
699
700 /* Disable battery low monitoring */
701 ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_LOW_LEV_COMP_REG,
702 PM2XXX_VBAT_LOW_MONITORING_ENA);
703
704 return ret;
705}
706
707static int pm2xxx_charger_ac_en(struct ux500_charger *charger,
708 int enable, int vset, int iset)
709{
710 int ret;
711 int volt_index;
712 int curr_index;
713 u8 val;
714
715 struct pm2xxx_charger *pm2 = to_pm2xxx_charger_ac_device_info(charger);
716
717 if (enable) {
718 if (!pm2->ac.charger_connected) {
719 dev_dbg(pm2->dev, "AC charger not connected\n");
720 return -ENXIO;
721 }
722
723 dev_dbg(pm2->dev, "Enable AC: %dmV %dmA\n", vset, iset);
724 if (!pm2->vddadc_en_ac) {
725 regulator_enable(pm2->regu);
726 pm2->vddadc_en_ac = true;
727 }
728
729 ret = pm2xxx_charging_init(pm2);
730 if (ret < 0) {
731 dev_err(pm2->dev, "%s charging init failed\n",
732 __func__);
733 goto error_occured;
734 }
735
736 volt_index = pm2xxx_voltage_to_regval(vset);
737 curr_index = pm2xxx_current_to_regval(iset);
738
739 if (volt_index < 0 || curr_index < 0) {
740 dev_err(pm2->dev,
741 "Charger voltage or current too high, "
742 "charging not started\n");
743 return -ENXIO;
744 }
745
746 ret = pm2xxx_reg_read(pm2, PM2XXX_BATT_CTRL_REG8, &val);
747 if (ret < 0) {
748 dev_err(pm2->dev, "%s pm2xxx read failed\n", __func__);
749 goto error_occured;
750 }
751 val &= ~PM2XXX_CH_VOLT_MASK;
752 val |= volt_index;
753 ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG8, val);
754 if (ret < 0) {
755 dev_err(pm2->dev, "%s pm2xxx write failed\n", __func__);
756 goto error_occured;
757 }
758
759 ret = pm2xxx_reg_read(pm2, PM2XXX_BATT_CTRL_REG6, &val);
760 if (ret < 0) {
761 dev_err(pm2->dev, "%s pm2xxx read failed\n", __func__);
762 goto error_occured;
763 }
764 val &= ~PM2XXX_DIR_CH_CC_CURRENT_MASK;
765 val |= curr_index;
766 ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_CTRL_REG6, val);
767 if (ret < 0) {
768 dev_err(pm2->dev, "%s pm2xxx write failed\n", __func__);
769 goto error_occured;
770 }
771
772 if (!pm2->bat->enable_overshoot) {
773 ret = pm2xxx_reg_read(pm2, PM2XXX_LED_CTRL_REG, &val);
774 if (ret < 0) {
775 dev_err(pm2->dev, "%s pm2xxx read failed\n",
776 __func__);
777 goto error_occured;
778 }
779 val |= PM2XXX_ANTI_OVERSHOOT_EN;
780 ret = pm2xxx_reg_write(pm2, PM2XXX_LED_CTRL_REG, val);
781 if (ret < 0) {
782 dev_err(pm2->dev, "%s pm2xxx write failed\n",
783 __func__);
784 goto error_occured;
785 }
786 }
787
788 ret = pm2xxx_charging_enable_mngt(pm2);
789 if (ret < 0) {
790 dev_err(pm2->dev, "Failed to enable"
791 "pm2xxx ac charger\n");
792 goto error_occured;
793 }
794
795 pm2->ac.charger_online = 1;
796 } else {
797 pm2->ac.charger_online = 0;
798 pm2->ac.wd_expired = false;
799
800 /* Disable regulator if enabled */
801 if (pm2->vddadc_en_ac) {
802 regulator_disable(pm2->regu);
803 pm2->vddadc_en_ac = false;
804 }
805
806 ret = pm2xxx_charging_disable_mngt(pm2);
807 if (ret < 0) {
808 dev_err(pm2->dev, "failed to disable"
809 "pm2xxx ac charger\n");
810 goto error_occured;
811 }
812
813 dev_dbg(pm2->dev, "PM2301: " "Disabled AC charging\n");
814 }
815 power_supply_changed(&pm2->ac_chg.psy);
816
817error_occured:
818 return ret;
819}
820
821static int pm2xxx_charger_watchdog_kick(struct ux500_charger *charger)
822{
823 int ret;
824 struct pm2xxx_charger *pm2;
825
826 if (charger->psy.type == POWER_SUPPLY_TYPE_MAINS)
827 pm2 = to_pm2xxx_charger_ac_device_info(charger);
828 else
829 return -ENXIO;
830
831 ret = pm2xxx_reg_write(pm2, PM2XXX_BATT_WD_KICK, WD_TIMER);
832 if (ret)
833 dev_err(pm2->dev, "Failed to kick WD!\n");
834
835 return ret;
836}
837
838static void pm2xxx_charger_ac_work(struct work_struct *work)
839{
840 struct pm2xxx_charger *pm2 = container_of(work,
841 struct pm2xxx_charger, ac_work);
842
843
844 power_supply_changed(&pm2->ac_chg.psy);
845 sysfs_notify(&pm2->ac_chg.psy.dev->kobj, NULL, "present");
846};
847
848static void pm2xxx_charger_check_hw_failure_work(struct work_struct *work)
849{
850 u8 reg_value;
851
852 struct pm2xxx_charger *pm2 = container_of(work,
853 struct pm2xxx_charger, check_hw_failure_work.work);
854
855 if (pm2->flags.ovv) {
856 pm2xxx_reg_read(pm2, PM2XXX_SRCE_REG_INT4, ®_value);
857
858 if (!(reg_value & (PM2XXX_INT4_S_ITVPWR1OVV |
859 PM2XXX_INT4_S_ITVPWR2OVV))) {
860 pm2->flags.ovv = false;
861 power_supply_changed(&pm2->ac_chg.psy);
862 }
863 }
864
865 /* If we still have a failure, schedule a new check */
866 if (pm2->flags.ovv) {
867 queue_delayed_work(pm2->charger_wq,
868 &pm2->check_hw_failure_work, round_jiffies(HZ));
869 }
870}
871
872static void pm2xxx_charger_check_main_thermal_prot_work(
873 struct work_struct *work)
874{
875 int ret;
876 u8 val;
877
878 struct pm2xxx_charger *pm2 = container_of(work, struct pm2xxx_charger,
879 check_main_thermal_prot_work);
880
881 /* Check if die temp warning is still active */
882 ret = pm2xxx_reg_read(pm2, PM2XXX_SRCE_REG_INT5, &val);
883 if (ret < 0) {
884 dev_err(pm2->dev, "%s pm2xxx read failed\n", __func__);
885 return;
886 }
887 if (val & (PM2XXX_INT5_S_ITTHERMALWARNINGRISE
888 | PM2XXX_INT5_S_ITTHERMALSHUTDOWNRISE))
889 pm2->flags.main_thermal_prot = true;
890 else if (val & (PM2XXX_INT5_S_ITTHERMALWARNINGFALL
891 | PM2XXX_INT5_S_ITTHERMALSHUTDOWNFALL))
892 pm2->flags.main_thermal_prot = false;
893
894 power_supply_changed(&pm2->ac_chg.psy);
895}
896
897static struct pm2xxx_interrupts pm2xxx_int = {
898 .handler[0] = pm2_int_reg0,
899 .handler[1] = pm2_int_reg1,
900 .handler[2] = pm2_int_reg2,
901 .handler[3] = pm2_int_reg3,
902 .handler[4] = pm2_int_reg4,
903 .handler[5] = pm2_int_reg5,
904};
905
906static struct pm2xxx_irq pm2xxx_charger_irq[] = {
907 {"PM2XXX_IRQ_INT", pm2xxx_irq_int},
908};
909
910#ifdef CONFIG_PM
911
912#ifdef CONFIG_PM_SLEEP
913
914static int pm2xxx_wall_charger_resume(struct device *dev)
915{
916 struct i2c_client *i2c_client = to_i2c_client(dev);
917 struct pm2xxx_charger *pm2;
918
919 pm2 = (struct pm2xxx_charger *)i2c_get_clientdata(i2c_client);
920 set_lpn_pin(pm2);
921
922 /* If we still have a HW failure, schedule a new check */
923 if (pm2->flags.ovv)
924 queue_delayed_work(pm2->charger_wq,
925 &pm2->check_hw_failure_work, 0);
926
927 return 0;
928}
929
930static int pm2xxx_wall_charger_suspend(struct device *dev)
931{
932 struct i2c_client *i2c_client = to_i2c_client(dev);
933 struct pm2xxx_charger *pm2;
934
935 pm2 = (struct pm2xxx_charger *)i2c_get_clientdata(i2c_client);
936 clear_lpn_pin(pm2);
937
938 /* Cancel any pending HW failure check */
939 if (delayed_work_pending(&pm2->check_hw_failure_work))
940 cancel_delayed_work(&pm2->check_hw_failure_work);
941
942 flush_work(&pm2->ac_work);
943 flush_work(&pm2->check_main_thermal_prot_work);
944
945 return 0;
946}
947
948#endif
949
950#ifdef CONFIG_PM_RUNTIME
951
952static int pm2xxx_runtime_suspend(struct device *dev)
953{
954 struct i2c_client *pm2xxx_i2c_client = to_i2c_client(dev);
955 struct pm2xxx_charger *pm2;
956 int ret = 0;
957
958 pm2 = (struct pm2xxx_charger *)i2c_get_clientdata(pm2xxx_i2c_client);
959 if (!pm2) {
960 dev_err(pm2->dev, "no pm2xxx_charger data supplied\n");
961 ret = -EINVAL;
962 return ret;
963 }
964
965 clear_lpn_pin(pm2);
966
967 return ret;
968}
969
970static int pm2xxx_runtime_resume(struct device *dev)
971{
972 struct i2c_client *pm2xxx_i2c_client = to_i2c_client(dev);
973 struct pm2xxx_charger *pm2;
974 int ret = 0;
975
976 pm2 = (struct pm2xxx_charger *)i2c_get_clientdata(pm2xxx_i2c_client);
977 if (!pm2) {
978 dev_err(pm2->dev, "no pm2xxx_charger data supplied\n");
979 ret = -EINVAL;
980 return ret;
981 }
982
983 if (gpio_is_valid(pm2->lpn_pin) && gpio_get_value(pm2->lpn_pin) == 0)
984 set_lpn_pin(pm2);
985
986 return ret;
987}
988
989#endif
990
991static const struct dev_pm_ops pm2xxx_pm_ops = {
992 SET_SYSTEM_SLEEP_PM_OPS(pm2xxx_wall_charger_suspend,
993 pm2xxx_wall_charger_resume)
994 SET_RUNTIME_PM_OPS(pm2xxx_runtime_suspend, pm2xxx_runtime_resume, NULL)
995};
996#define PM2XXX_PM_OPS (&pm2xxx_pm_ops)
997#else
998#define PM2XXX_PM_OPS NULL
999#endif
1000
1001static int pm2xxx_wall_charger_probe(struct i2c_client *i2c_client,
1002 const struct i2c_device_id *id)
1003{
1004 struct pm2xxx_platform_data *pl_data = i2c_client->dev.platform_data;
1005 struct pm2xxx_charger *pm2;
1006 int ret = 0;
1007 u8 val;
1008 int i;
1009
1010 pm2 = kzalloc(sizeof(struct pm2xxx_charger), GFP_KERNEL);
1011 if (!pm2) {
1012 dev_err(pm2->dev, "pm2xxx_charger allocation failed\n");
1013 return -ENOMEM;
1014 }
1015
1016 /* get parent data */
1017 pm2->dev = &i2c_client->dev;
1018
1019 pm2->pm2_int = &pm2xxx_int;
1020
1021 /* get charger spcific platform data */
1022 if (!pl_data->wall_charger) {
1023 dev_err(pm2->dev, "no charger platform data supplied\n");
1024 ret = -EINVAL;
1025 goto free_device_info;
1026 }
1027
1028 pm2->pdata = pl_data->wall_charger;
1029
1030 /* get battery specific platform data */
1031 if (!pl_data->battery) {
1032 dev_err(pm2->dev, "no battery platform data supplied\n");
1033 ret = -EINVAL;
1034 goto free_device_info;
1035 }
1036
1037 pm2->bat = pl_data->battery;
1038
1039 if (!i2c_check_functionality(i2c_client->adapter,
1040 I2C_FUNC_SMBUS_BYTE_DATA |
1041 I2C_FUNC_SMBUS_READ_WORD_DATA)) {
1042 ret = -ENODEV;
1043 dev_info(pm2->dev, "pm2301 i2c_check_functionality failed\n");
1044 goto free_device_info;
1045 }
1046
1047 pm2->config.pm2xxx_i2c = i2c_client;
1048 pm2->config.pm2xxx_id = (struct i2c_device_id *) id;
1049 i2c_set_clientdata(i2c_client, pm2);
1050
1051 /* AC supply */
1052 /* power_supply base class */
1053 pm2->ac_chg.psy.name = pm2->pdata->label;
1054 pm2->ac_chg.psy.type = POWER_SUPPLY_TYPE_MAINS;
1055 pm2->ac_chg.psy.properties = pm2xxx_charger_ac_props;
1056 pm2->ac_chg.psy.num_properties = ARRAY_SIZE(pm2xxx_charger_ac_props);
1057 pm2->ac_chg.psy.get_property = pm2xxx_charger_ac_get_property;
1058 pm2->ac_chg.psy.supplied_to = pm2->pdata->supplied_to;
1059 pm2->ac_chg.psy.num_supplicants = pm2->pdata->num_supplicants;
1060 /* pm2xxx_charger sub-class */
1061 pm2->ac_chg.ops.enable = &pm2xxx_charger_ac_en;
1062 pm2->ac_chg.ops.kick_wd = &pm2xxx_charger_watchdog_kick;
1063 pm2->ac_chg.ops.update_curr = &pm2xxx_charger_update_charger_current;
1064 pm2->ac_chg.max_out_volt = pm2xxx_charger_voltage_map[
1065 ARRAY_SIZE(pm2xxx_charger_voltage_map) - 1];
1066 pm2->ac_chg.max_out_curr = pm2xxx_charger_current_map[
1067 ARRAY_SIZE(pm2xxx_charger_current_map) - 1];
1068 pm2->ac_chg.wdt_refresh = WD_KICK_INTERVAL;
1069 pm2->ac_chg.enabled = true;
1070 pm2->ac_chg.external = true;
1071
1072 /* Create a work queue for the charger */
1073 pm2->charger_wq =
1074 create_singlethread_workqueue("pm2xxx_charger_wq");
1075 if (pm2->charger_wq == NULL) {
1076 dev_err(pm2->dev, "failed to create work queue\n");
1077 goto free_device_info;
1078 }
1079
1080 /* Init work for charger detection */
1081 INIT_WORK(&pm2->ac_work, pm2xxx_charger_ac_work);
1082
1083 /* Init work for checking HW status */
1084 INIT_WORK(&pm2->check_main_thermal_prot_work,
1085 pm2xxx_charger_check_main_thermal_prot_work);
1086
1087 /* Init work for HW failure check */
1088 INIT_DEFERRABLE_WORK(&pm2->check_hw_failure_work,
1089 pm2xxx_charger_check_hw_failure_work);
1090
1091 /*
1092 * VDD ADC supply needs to be enabled from this driver when there
1093 * is a charger connected to avoid erroneous BTEMP_HIGH/LOW
1094 * interrupts during charging
1095 */
1096 pm2->regu = regulator_get(pm2->dev, "vddadc");
1097 if (IS_ERR(pm2->regu)) {
1098 ret = PTR_ERR(pm2->regu);
1099 dev_err(pm2->dev, "failed to get vddadc regulator\n");
1100 goto free_charger_wq;
1101 }
1102
1103 /* Register AC charger class */
1104 ret = power_supply_register(pm2->dev, &pm2->ac_chg.psy);
1105 if (ret) {
1106 dev_err(pm2->dev, "failed to register AC charger\n");
1107 goto free_regulator;
1108 }
1109
1110 /* Register interrupts */
1111 ret = request_threaded_irq(gpio_to_irq(pm2->pdata->gpio_irq_number),
1112 NULL,
1113 pm2xxx_charger_irq[0].isr,
1114 pm2->pdata->irq_type,
1115 pm2xxx_charger_irq[0].name, pm2);
1116
1117 if (ret != 0) {
1118 dev_err(pm2->dev, "failed to request %s IRQ %d: %d\n",
1119 pm2xxx_charger_irq[0].name,
1120 gpio_to_irq(pm2->pdata->gpio_irq_number), ret);
1121 goto unregister_pm2xxx_charger;
1122 }
1123
1124 ret = pm_runtime_set_active(pm2->dev);
1125 if (ret)
1126 dev_err(pm2->dev, "set active Error\n");
1127
1128 pm_runtime_enable(pm2->dev);
1129 pm_runtime_set_autosuspend_delay(pm2->dev, PM2XXX_AUTOSUSPEND_DELAY);
1130 pm_runtime_use_autosuspend(pm2->dev);
1131 pm_runtime_resume(pm2->dev);
1132
1133 /* pm interrupt can wake up system */
1134 ret = enable_irq_wake(gpio_to_irq(pm2->pdata->gpio_irq_number));
1135 if (ret) {
1136 dev_err(pm2->dev, "failed to set irq wake\n");
1137 goto unregister_pm2xxx_interrupt;
1138 }
1139
1140 mutex_init(&pm2->lock);
1141
1142 if (gpio_is_valid(pm2->pdata->lpn_gpio)) {
1143 /* get lpn GPIO from platform data */
1144 pm2->lpn_pin = pm2->pdata->lpn_gpio;
1145
1146 /*
1147 * Charger detection mechanism requires pulling up the LPN pin
1148 * while i2c communication if Charger is not connected
1149 * LPN pin of PM2301 is GPIO60 of AB9540
1150 */
1151 ret = gpio_request(pm2->lpn_pin, "pm2301_lpm_gpio");
1152
1153 if (ret < 0) {
1154 dev_err(pm2->dev, "pm2301_lpm_gpio request failed\n");
1155 goto disable_pm2_irq_wake;
1156 }
1157 ret = gpio_direction_output(pm2->lpn_pin, 0);
1158 if (ret < 0) {
1159 dev_err(pm2->dev, "pm2301_lpm_gpio direction failed\n");
1160 goto free_gpio;
1161 }
1162 set_lpn_pin(pm2);
1163 }
1164
1165 /* read interrupt registers */
1166 for (i = 0; i < PM2XXX_NUM_INT_REG; i++)
1167 pm2xxx_reg_read(pm2,
1168 pm2xxx_interrupt_registers[i],
1169 &val);
1170
1171 ret = pm2xxx_charger_detection(pm2, &val);
1172
1173 if ((ret == 0) && val) {
1174 pm2->ac.charger_connected = 1;
1175 ab8500_override_turn_on_stat(~AB8500_POW_KEY_1_ON,
1176 AB8500_MAIN_CH_DET);
1177 pm2->ac_conn = true;
1178 power_supply_changed(&pm2->ac_chg.psy);
1179 sysfs_notify(&pm2->ac_chg.psy.dev->kobj, NULL, "present");
1180 }
1181
1182 return 0;
1183
1184free_gpio:
1185 if (gpio_is_valid(pm2->lpn_pin))
1186 gpio_free(pm2->lpn_pin);
1187disable_pm2_irq_wake:
1188 disable_irq_wake(gpio_to_irq(pm2->pdata->gpio_irq_number));
1189unregister_pm2xxx_interrupt:
1190 /* disable interrupt */
1191 free_irq(gpio_to_irq(pm2->pdata->gpio_irq_number), pm2);
1192unregister_pm2xxx_charger:
1193 /* unregister power supply */
1194 power_supply_unregister(&pm2->ac_chg.psy);
1195free_regulator:
1196 /* disable the regulator */
1197 regulator_put(pm2->regu);
1198free_charger_wq:
1199 destroy_workqueue(pm2->charger_wq);
1200free_device_info:
1201 kfree(pm2);
1202
1203 return ret;
1204}
1205
1206static int pm2xxx_wall_charger_remove(struct i2c_client *i2c_client)
1207{
1208 struct pm2xxx_charger *pm2 = i2c_get_clientdata(i2c_client);
1209
1210 /* Disable pm_runtime */
1211 pm_runtime_disable(pm2->dev);
1212 /* Disable AC charging */
1213 pm2xxx_charger_ac_en(&pm2->ac_chg, false, 0, 0);
1214
1215 /* Disable wake by pm interrupt */
1216 disable_irq_wake(gpio_to_irq(pm2->pdata->gpio_irq_number));
1217
1218 /* Disable interrupts */
1219 free_irq(gpio_to_irq(pm2->pdata->gpio_irq_number), pm2);
1220
1221 /* Delete the work queue */
1222 destroy_workqueue(pm2->charger_wq);
1223
1224 flush_scheduled_work();
1225
1226 /* disable the regulator */
1227 regulator_put(pm2->regu);
1228
1229 power_supply_unregister(&pm2->ac_chg.psy);
1230
1231 if (gpio_is_valid(pm2->lpn_pin))
1232 gpio_free(pm2->lpn_pin);
1233
1234 kfree(pm2);
1235
1236 return 0;
1237}
1238
1239static const struct i2c_device_id pm2xxx_id[] = {
1240 { "pm2301", 0 },
1241 { }
1242};
1243
1244MODULE_DEVICE_TABLE(i2c, pm2xxx_id);
1245
1246static struct i2c_driver pm2xxx_charger_driver = {
1247 .probe = pm2xxx_wall_charger_probe,
1248 .remove = pm2xxx_wall_charger_remove,
1249 .driver = {
1250 .name = "pm2xxx-wall_charger",
1251 .owner = THIS_MODULE,
1252 .pm = PM2XXX_PM_OPS,
1253 },
1254 .id_table = pm2xxx_id,
1255};
1256
1257static int __init pm2xxx_charger_init(void)
1258{
1259 return i2c_add_driver(&pm2xxx_charger_driver);
1260}
1261
1262static void __exit pm2xxx_charger_exit(void)
1263{
1264 i2c_del_driver(&pm2xxx_charger_driver);
1265}
1266
1267device_initcall_sync(pm2xxx_charger_init);
1268module_exit(pm2xxx_charger_exit);
1269
1270MODULE_LICENSE("GPL v2");
1271MODULE_AUTHOR("Rajkumar kasirajan, Olivier Launay");
1272MODULE_ALIAS("platform:pm2xxx-charger");
1273MODULE_DESCRIPTION("PM2xxx charger management driver");