forked from lordarcadius/electrablue_mido
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathbq24190_charger.c
1550 lines (1305 loc) · 40.5 KB
/
bq24190_charger.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*
* Driver for the TI bq24190 battery charger.
*
* Author: Mark A. Greer <mgreer@animalcreek.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/of_irq.h>
#include <linux/of_device.h>
#include <linux/pm_runtime.h>
#include <linux/power_supply.h>
#include <linux/gpio.h>
#include <linux/i2c.h>
#include <linux/power/bq24190_charger.h>
#define BQ24190_MANUFACTURER "Texas Instruments"
#define BQ24190_REG_ISC 0x00 /* Input Source Control */
#define BQ24190_REG_ISC_EN_HIZ_MASK BIT(7)
#define BQ24190_REG_ISC_EN_HIZ_SHIFT 7
#define BQ24190_REG_ISC_VINDPM_MASK (BIT(6) | BIT(5) | BIT(4) | \
BIT(3))
#define BQ24190_REG_ISC_VINDPM_SHIFT 3
#define BQ24190_REG_ISC_IINLIM_MASK (BIT(2) | BIT(1) | BIT(0))
#define BQ24190_REG_ISC_IINLIM_SHIFT 0
#define BQ24190_REG_POC 0x01 /* Power-On Configuration */
#define BQ24190_REG_POC_RESET_MASK BIT(7)
#define BQ24190_REG_POC_RESET_SHIFT 7
#define BQ24190_REG_POC_WDT_RESET_MASK BIT(6)
#define BQ24190_REG_POC_WDT_RESET_SHIFT 6
#define BQ24190_REG_POC_CHG_CONFIG_MASK (BIT(5) | BIT(4))
#define BQ24190_REG_POC_CHG_CONFIG_SHIFT 4
#define BQ24190_REG_POC_SYS_MIN_MASK (BIT(3) | BIT(2) | BIT(1))
#define BQ24190_REG_POC_SYS_MIN_SHIFT 1
#define BQ24190_REG_POC_BOOST_LIM_MASK BIT(0)
#define BQ24190_REG_POC_BOOST_LIM_SHIFT 0
#define BQ24190_REG_CCC 0x02 /* Charge Current Control */
#define BQ24190_REG_CCC_ICHG_MASK (BIT(7) | BIT(6) | BIT(5) | \
BIT(4) | BIT(3) | BIT(2))
#define BQ24190_REG_CCC_ICHG_SHIFT 2
#define BQ24190_REG_CCC_FORCE_20PCT_MASK BIT(0)
#define BQ24190_REG_CCC_FORCE_20PCT_SHIFT 0
#define BQ24190_REG_PCTCC 0x03 /* Pre-charge/Termination Current Cntl */
#define BQ24190_REG_PCTCC_IPRECHG_MASK (BIT(7) | BIT(6) | BIT(5) | \
BIT(4))
#define BQ24190_REG_PCTCC_IPRECHG_SHIFT 4
#define BQ24190_REG_PCTCC_ITERM_MASK (BIT(3) | BIT(2) | BIT(1) | \
BIT(0))
#define BQ24190_REG_PCTCC_ITERM_SHIFT 0
#define BQ24190_REG_CVC 0x04 /* Charge Voltage Control */
#define BQ24190_REG_CVC_VREG_MASK (BIT(7) | BIT(6) | BIT(5) | \
BIT(4) | BIT(3) | BIT(2))
#define BQ24190_REG_CVC_VREG_SHIFT 2
#define BQ24190_REG_CVC_BATLOWV_MASK BIT(1)
#define BQ24190_REG_CVC_BATLOWV_SHIFT 1
#define BQ24190_REG_CVC_VRECHG_MASK BIT(0)
#define BQ24190_REG_CVC_VRECHG_SHIFT 0
#define BQ24190_REG_CTTC 0x05 /* Charge Term/Timer Control */
#define BQ24190_REG_CTTC_EN_TERM_MASK BIT(7)
#define BQ24190_REG_CTTC_EN_TERM_SHIFT 7
#define BQ24190_REG_CTTC_TERM_STAT_MASK BIT(6)
#define BQ24190_REG_CTTC_TERM_STAT_SHIFT 6
#define BQ24190_REG_CTTC_WATCHDOG_MASK (BIT(5) | BIT(4))
#define BQ24190_REG_CTTC_WATCHDOG_SHIFT 4
#define BQ24190_REG_CTTC_EN_TIMER_MASK BIT(3)
#define BQ24190_REG_CTTC_EN_TIMER_SHIFT 3
#define BQ24190_REG_CTTC_CHG_TIMER_MASK (BIT(2) | BIT(1))
#define BQ24190_REG_CTTC_CHG_TIMER_SHIFT 1
#define BQ24190_REG_CTTC_JEITA_ISET_MASK BIT(0)
#define BQ24190_REG_CTTC_JEITA_ISET_SHIFT 0
#define BQ24190_REG_ICTRC 0x06 /* IR Comp/Thermal Regulation Control */
#define BQ24190_REG_ICTRC_BAT_COMP_MASK (BIT(7) | BIT(6) | BIT(5))
#define BQ24190_REG_ICTRC_BAT_COMP_SHIFT 5
#define BQ24190_REG_ICTRC_VCLAMP_MASK (BIT(4) | BIT(3) | BIT(2))
#define BQ24190_REG_ICTRC_VCLAMP_SHIFT 2
#define BQ24190_REG_ICTRC_TREG_MASK (BIT(1) | BIT(0))
#define BQ24190_REG_ICTRC_TREG_SHIFT 0
#define BQ24190_REG_MOC 0x07 /* Misc. Operation Control */
#define BQ24190_REG_MOC_DPDM_EN_MASK BIT(7)
#define BQ24190_REG_MOC_DPDM_EN_SHIFT 7
#define BQ24190_REG_MOC_TMR2X_EN_MASK BIT(6)
#define BQ24190_REG_MOC_TMR2X_EN_SHIFT 6
#define BQ24190_REG_MOC_BATFET_DISABLE_MASK BIT(5)
#define BQ24190_REG_MOC_BATFET_DISABLE_SHIFT 5
#define BQ24190_REG_MOC_JEITA_VSET_MASK BIT(4)
#define BQ24190_REG_MOC_JEITA_VSET_SHIFT 4
#define BQ24190_REG_MOC_INT_MASK_MASK (BIT(1) | BIT(0))
#define BQ24190_REG_MOC_INT_MASK_SHIFT 0
#define BQ24190_REG_SS 0x08 /* System Status */
#define BQ24190_REG_SS_VBUS_STAT_MASK (BIT(7) | BIT(6))
#define BQ24190_REG_SS_VBUS_STAT_SHIFT 6
#define BQ24190_REG_SS_CHRG_STAT_MASK (BIT(5) | BIT(4))
#define BQ24190_REG_SS_CHRG_STAT_SHIFT 4
#define BQ24190_REG_SS_DPM_STAT_MASK BIT(3)
#define BQ24190_REG_SS_DPM_STAT_SHIFT 3
#define BQ24190_REG_SS_PG_STAT_MASK BIT(2)
#define BQ24190_REG_SS_PG_STAT_SHIFT 2
#define BQ24190_REG_SS_THERM_STAT_MASK BIT(1)
#define BQ24190_REG_SS_THERM_STAT_SHIFT 1
#define BQ24190_REG_SS_VSYS_STAT_MASK BIT(0)
#define BQ24190_REG_SS_VSYS_STAT_SHIFT 0
#define BQ24190_REG_F 0x09 /* Fault */
#define BQ24190_REG_F_WATCHDOG_FAULT_MASK BIT(7)
#define BQ24190_REG_F_WATCHDOG_FAULT_SHIFT 7
#define BQ24190_REG_F_BOOST_FAULT_MASK BIT(6)
#define BQ24190_REG_F_BOOST_FAULT_SHIFT 6
#define BQ24190_REG_F_CHRG_FAULT_MASK (BIT(5) | BIT(4))
#define BQ24190_REG_F_CHRG_FAULT_SHIFT 4
#define BQ24190_REG_F_BAT_FAULT_MASK BIT(3)
#define BQ24190_REG_F_BAT_FAULT_SHIFT 3
#define BQ24190_REG_F_NTC_FAULT_MASK (BIT(2) | BIT(1) | BIT(0))
#define BQ24190_REG_F_NTC_FAULT_SHIFT 0
#define BQ24190_REG_VPRS 0x0A /* Vendor/Part/Revision Status */
#define BQ24190_REG_VPRS_PN_MASK (BIT(5) | BIT(4) | BIT(3))
#define BQ24190_REG_VPRS_PN_SHIFT 3
#define BQ24190_REG_VPRS_PN_24190 0x4
#define BQ24190_REG_VPRS_PN_24192 0x5 /* Also 24193 */
#define BQ24190_REG_VPRS_PN_24192I 0x3
#define BQ24190_REG_VPRS_TS_PROFILE_MASK BIT(2)
#define BQ24190_REG_VPRS_TS_PROFILE_SHIFT 2
#define BQ24190_REG_VPRS_DEV_REG_MASK (BIT(1) | BIT(0))
#define BQ24190_REG_VPRS_DEV_REG_SHIFT 0
/*
* The FAULT register is latched by the bq24190 (except for NTC_FAULT)
* so the first read after a fault returns the latched value and subsequent
* reads return the current value. In order to return the fault status
* to the user, have the interrupt handler save the reg's value and retrieve
* it in the appropriate health/status routine. Each routine has its own
* flag indicating whether it should use the value stored by the last run
* of the interrupt handler or do an actual reg read. That way each routine
* can report back whatever fault may have occured.
*/
struct bq24190_dev_info {
struct i2c_client *client;
struct device *dev;
struct power_supply charger;
struct power_supply battery;
char model_name[I2C_NAME_SIZE];
kernel_ulong_t model;
unsigned int gpio_int;
unsigned int irq;
struct mutex f_reg_lock;
bool first_time;
bool charger_health_valid;
bool battery_health_valid;
bool battery_status_valid;
u8 f_reg;
u8 ss_reg;
u8 watchdog;
};
/*
* The tables below provide a 2-way mapping for the value that goes in
* the register field and the real-world value that it represents.
* The index of the array is the value that goes in the register; the
* number at that index in the array is the real-world value that it
* represents.
*/
/* REG02[7:2] (ICHG) in uAh */
static const int bq24190_ccc_ichg_values[] = {
512000, 576000, 640000, 704000, 768000, 832000, 896000, 960000,
1024000, 1088000, 1152000, 1216000, 1280000, 1344000, 1408000, 1472000,
1536000, 1600000, 1664000, 1728000, 1792000, 1856000, 1920000, 1984000,
2048000, 2112000, 2176000, 2240000, 2304000, 2368000, 2432000, 2496000,
2560000, 2624000, 2688000, 2752000, 2816000, 2880000, 2944000, 3008000,
3072000, 3136000, 3200000, 3264000, 3328000, 3392000, 3456000, 3520000,
3584000, 3648000, 3712000, 3776000, 3840000, 3904000, 3968000, 4032000,
4096000, 4160000, 4224000, 4288000, 4352000, 4416000, 4480000, 4544000
};
/* REG04[7:2] (VREG) in uV */
static const int bq24190_cvc_vreg_values[] = {
3504000, 3520000, 3536000, 3552000, 3568000, 3584000, 3600000, 3616000,
3632000, 3648000, 3664000, 3680000, 3696000, 3712000, 3728000, 3744000,
3760000, 3776000, 3792000, 3808000, 3824000, 3840000, 3856000, 3872000,
3888000, 3904000, 3920000, 3936000, 3952000, 3968000, 3984000, 4000000,
4016000, 4032000, 4048000, 4064000, 4080000, 4096000, 4112000, 4128000,
4144000, 4160000, 4176000, 4192000, 4208000, 4224000, 4240000, 4256000,
4272000, 4288000, 4304000, 4320000, 4336000, 4352000, 4368000, 4384000,
4400000
};
/* REG06[1:0] (TREG) in tenths of degrees Celcius */
static const int bq24190_ictrc_treg_values[] = {
600, 800, 1000, 1200
};
/*
* Return the index in 'tbl' of greatest value that is less than or equal to
* 'val'. The index range returned is 0 to 'tbl_size' - 1. Assumes that
* the values in 'tbl' are sorted from smallest to largest and 'tbl_size'
* is less than 2^8.
*/
static u8 bq24190_find_idx(const int tbl[], int tbl_size, int v)
{
int i;
for (i = 1; i < tbl_size; i++)
if (v < tbl[i])
break;
return i - 1;
}
/* Basic driver I/O routines */
static int bq24190_read(struct bq24190_dev_info *bdi, u8 reg, u8 *data)
{
int ret;
ret = i2c_smbus_read_byte_data(bdi->client, reg);
if (ret < 0)
return ret;
*data = ret;
return 0;
}
static int bq24190_write(struct bq24190_dev_info *bdi, u8 reg, u8 data)
{
return i2c_smbus_write_byte_data(bdi->client, reg, data);
}
static int bq24190_read_mask(struct bq24190_dev_info *bdi, u8 reg,
u8 mask, u8 shift, u8 *data)
{
u8 v;
int ret;
ret = bq24190_read(bdi, reg, &v);
if (ret < 0)
return ret;
v &= mask;
v >>= shift;
*data = v;
return 0;
}
static int bq24190_write_mask(struct bq24190_dev_info *bdi, u8 reg,
u8 mask, u8 shift, u8 data)
{
u8 v;
int ret;
ret = bq24190_read(bdi, reg, &v);
if (ret < 0)
return ret;
v &= ~mask;
v |= ((data << shift) & mask);
return bq24190_write(bdi, reg, v);
}
static int bq24190_get_field_val(struct bq24190_dev_info *bdi,
u8 reg, u8 mask, u8 shift,
const int tbl[], int tbl_size,
int *val)
{
u8 v;
int ret;
ret = bq24190_read_mask(bdi, reg, mask, shift, &v);
if (ret < 0)
return ret;
v = (v >= tbl_size) ? (tbl_size - 1) : v;
*val = tbl[v];
return 0;
}
static int bq24190_set_field_val(struct bq24190_dev_info *bdi,
u8 reg, u8 mask, u8 shift,
const int tbl[], int tbl_size,
int val)
{
u8 idx;
idx = bq24190_find_idx(tbl, tbl_size, val);
return bq24190_write_mask(bdi, reg, mask, shift, idx);
}
#ifdef CONFIG_SYSFS
/*
* There are a numerous options that are configurable on the bq24190
* that go well beyond what the power_supply properties provide access to.
* Provide sysfs access to them so they can be examined and possibly modified
* on the fly. They will be provided for the charger power_supply object only
* and will be prefixed by 'f_' to make them easier to recognize.
*/
#define BQ24190_SYSFS_FIELD(_name, r, f, m, store) \
{ \
.attr = __ATTR(f_##_name, m, bq24190_sysfs_show, store), \
.reg = BQ24190_REG_##r, \
.mask = BQ24190_REG_##r##_##f##_MASK, \
.shift = BQ24190_REG_##r##_##f##_SHIFT, \
}
#define BQ24190_SYSFS_FIELD_RW(_name, r, f) \
BQ24190_SYSFS_FIELD(_name, r, f, S_IWUSR | S_IRUGO, \
bq24190_sysfs_store)
#define BQ24190_SYSFS_FIELD_RO(_name, r, f) \
BQ24190_SYSFS_FIELD(_name, r, f, S_IRUGO, NULL)
static ssize_t bq24190_sysfs_show(struct device *dev,
struct device_attribute *attr, char *buf);
static ssize_t bq24190_sysfs_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count);
struct bq24190_sysfs_field_info {
struct device_attribute attr;
u8 reg;
u8 mask;
u8 shift;
};
/* On i386 ptrace-abi.h defines SS that breaks the macro calls below. */
#undef SS
static struct bq24190_sysfs_field_info bq24190_sysfs_field_tbl[] = {
/* sysfs name reg field in reg */
BQ24190_SYSFS_FIELD_RW(en_hiz, ISC, EN_HIZ),
BQ24190_SYSFS_FIELD_RW(vindpm, ISC, VINDPM),
BQ24190_SYSFS_FIELD_RW(iinlim, ISC, IINLIM),
BQ24190_SYSFS_FIELD_RW(chg_config, POC, CHG_CONFIG),
BQ24190_SYSFS_FIELD_RW(sys_min, POC, SYS_MIN),
BQ24190_SYSFS_FIELD_RW(boost_lim, POC, BOOST_LIM),
BQ24190_SYSFS_FIELD_RW(ichg, CCC, ICHG),
BQ24190_SYSFS_FIELD_RW(force_20_pct, CCC, FORCE_20PCT),
BQ24190_SYSFS_FIELD_RW(iprechg, PCTCC, IPRECHG),
BQ24190_SYSFS_FIELD_RW(iterm, PCTCC, ITERM),
BQ24190_SYSFS_FIELD_RW(vreg, CVC, VREG),
BQ24190_SYSFS_FIELD_RW(batlowv, CVC, BATLOWV),
BQ24190_SYSFS_FIELD_RW(vrechg, CVC, VRECHG),
BQ24190_SYSFS_FIELD_RW(en_term, CTTC, EN_TERM),
BQ24190_SYSFS_FIELD_RW(term_stat, CTTC, TERM_STAT),
BQ24190_SYSFS_FIELD_RO(watchdog, CTTC, WATCHDOG),
BQ24190_SYSFS_FIELD_RW(en_timer, CTTC, EN_TIMER),
BQ24190_SYSFS_FIELD_RW(chg_timer, CTTC, CHG_TIMER),
BQ24190_SYSFS_FIELD_RW(jeta_iset, CTTC, JEITA_ISET),
BQ24190_SYSFS_FIELD_RW(bat_comp, ICTRC, BAT_COMP),
BQ24190_SYSFS_FIELD_RW(vclamp, ICTRC, VCLAMP),
BQ24190_SYSFS_FIELD_RW(treg, ICTRC, TREG),
BQ24190_SYSFS_FIELD_RW(dpdm_en, MOC, DPDM_EN),
BQ24190_SYSFS_FIELD_RW(tmr2x_en, MOC, TMR2X_EN),
BQ24190_SYSFS_FIELD_RW(batfet_disable, MOC, BATFET_DISABLE),
BQ24190_SYSFS_FIELD_RW(jeita_vset, MOC, JEITA_VSET),
BQ24190_SYSFS_FIELD_RO(int_mask, MOC, INT_MASK),
BQ24190_SYSFS_FIELD_RO(vbus_stat, SS, VBUS_STAT),
BQ24190_SYSFS_FIELD_RO(chrg_stat, SS, CHRG_STAT),
BQ24190_SYSFS_FIELD_RO(dpm_stat, SS, DPM_STAT),
BQ24190_SYSFS_FIELD_RO(pg_stat, SS, PG_STAT),
BQ24190_SYSFS_FIELD_RO(therm_stat, SS, THERM_STAT),
BQ24190_SYSFS_FIELD_RO(vsys_stat, SS, VSYS_STAT),
BQ24190_SYSFS_FIELD_RO(watchdog_fault, F, WATCHDOG_FAULT),
BQ24190_SYSFS_FIELD_RO(boost_fault, F, BOOST_FAULT),
BQ24190_SYSFS_FIELD_RO(chrg_fault, F, CHRG_FAULT),
BQ24190_SYSFS_FIELD_RO(bat_fault, F, BAT_FAULT),
BQ24190_SYSFS_FIELD_RO(ntc_fault, F, NTC_FAULT),
BQ24190_SYSFS_FIELD_RO(pn, VPRS, PN),
BQ24190_SYSFS_FIELD_RO(ts_profile, VPRS, TS_PROFILE),
BQ24190_SYSFS_FIELD_RO(dev_reg, VPRS, DEV_REG),
};
static struct attribute *
bq24190_sysfs_attrs[ARRAY_SIZE(bq24190_sysfs_field_tbl) + 1];
static const struct attribute_group bq24190_sysfs_attr_group = {
.attrs = bq24190_sysfs_attrs,
};
static void bq24190_sysfs_init_attrs(void)
{
int i, limit = ARRAY_SIZE(bq24190_sysfs_field_tbl);
for (i = 0; i < limit; i++)
bq24190_sysfs_attrs[i] = &bq24190_sysfs_field_tbl[i].attr.attr;
bq24190_sysfs_attrs[limit] = NULL; /* Has additional entry for this */
}
static struct bq24190_sysfs_field_info *bq24190_sysfs_field_lookup(
const char *name)
{
int i, limit = ARRAY_SIZE(bq24190_sysfs_field_tbl);
for (i = 0; i < limit; i++)
if (!strcmp(name, bq24190_sysfs_field_tbl[i].attr.attr.name))
break;
if (i >= limit)
return NULL;
return &bq24190_sysfs_field_tbl[i];
}
static ssize_t bq24190_sysfs_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct power_supply *psy = dev_get_drvdata(dev);
struct bq24190_dev_info *bdi =
container_of(psy, struct bq24190_dev_info, charger);
struct bq24190_sysfs_field_info *info;
int ret;
u8 v;
info = bq24190_sysfs_field_lookup(attr->attr.name);
if (!info)
return -EINVAL;
ret = bq24190_read_mask(bdi, info->reg, info->mask, info->shift, &v);
if (ret)
return ret;
return scnprintf(buf, PAGE_SIZE, "%hhx\n", v);
}
static ssize_t bq24190_sysfs_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct power_supply *psy = dev_get_drvdata(dev);
struct bq24190_dev_info *bdi =
container_of(psy, struct bq24190_dev_info, charger);
struct bq24190_sysfs_field_info *info;
int ret;
u8 v;
info = bq24190_sysfs_field_lookup(attr->attr.name);
if (!info)
return -EINVAL;
ret = kstrtou8(buf, 0, &v);
if (ret < 0)
return ret;
ret = bq24190_write_mask(bdi, info->reg, info->mask, info->shift, v);
if (ret)
return ret;
return count;
}
static int bq24190_sysfs_create_group(struct bq24190_dev_info *bdi)
{
bq24190_sysfs_init_attrs();
return sysfs_create_group(&bdi->charger.dev->kobj,
&bq24190_sysfs_attr_group);
}
static void bq24190_sysfs_remove_group(struct bq24190_dev_info *bdi)
{
sysfs_remove_group(&bdi->charger.dev->kobj, &bq24190_sysfs_attr_group);
}
#else
static int bq24190_sysfs_create_group(struct bq24190_dev_info *bdi)
{
return 0;
}
static inline void bq24190_sysfs_remove_group(struct bq24190_dev_info *bdi) {}
#endif
/*
* According to the "Host Mode and default Mode" section of the
* manual, a write to any register causes the bq24190 to switch
* from default mode to host mode. It will switch back to default
* mode after a WDT timeout unless the WDT is turned off as well.
* So, by simply turning off the WDT, we accomplish both with the
* same write.
*/
static int bq24190_set_mode_host(struct bq24190_dev_info *bdi)
{
int ret;
u8 v;
ret = bq24190_read(bdi, BQ24190_REG_CTTC, &v);
if (ret < 0)
return ret;
bdi->watchdog = ((v & BQ24190_REG_CTTC_WATCHDOG_MASK) >>
BQ24190_REG_CTTC_WATCHDOG_SHIFT);
v &= ~BQ24190_REG_CTTC_WATCHDOG_MASK;
return bq24190_write(bdi, BQ24190_REG_CTTC, v);
}
static int bq24190_register_reset(struct bq24190_dev_info *bdi)
{
int ret, limit = 100;
u8 v;
/* Reset the registers */
ret = bq24190_write_mask(bdi, BQ24190_REG_POC,
BQ24190_REG_POC_RESET_MASK,
BQ24190_REG_POC_RESET_SHIFT,
0x1);
if (ret < 0)
return ret;
/* Reset bit will be cleared by hardware so poll until it is */
do {
ret = bq24190_read_mask(bdi, BQ24190_REG_POC,
BQ24190_REG_POC_RESET_MASK,
BQ24190_REG_POC_RESET_SHIFT,
&v);
if (ret < 0)
return ret;
if (!v)
break;
udelay(10);
} while (--limit);
if (!limit)
return -EIO;
return 0;
}
/* Charger power supply property routines */
static int bq24190_charger_get_charge_type(struct bq24190_dev_info *bdi,
union power_supply_propval *val)
{
u8 v;
int type, ret;
ret = bq24190_read_mask(bdi, BQ24190_REG_POC,
BQ24190_REG_POC_CHG_CONFIG_MASK,
BQ24190_REG_POC_CHG_CONFIG_SHIFT,
&v);
if (ret < 0)
return ret;
/* If POC[CHG_CONFIG] (REG01[5:4]) == 0, charge is disabled */
if (!v) {
type = POWER_SUPPLY_CHARGE_TYPE_NONE;
} else {
ret = bq24190_read_mask(bdi, BQ24190_REG_CCC,
BQ24190_REG_CCC_FORCE_20PCT_MASK,
BQ24190_REG_CCC_FORCE_20PCT_SHIFT,
&v);
if (ret < 0)
return ret;
type = (v) ? POWER_SUPPLY_CHARGE_TYPE_TRICKLE :
POWER_SUPPLY_CHARGE_TYPE_FAST;
}
val->intval = type;
return 0;
}
static int bq24190_charger_set_charge_type(struct bq24190_dev_info *bdi,
const union power_supply_propval *val)
{
u8 chg_config, force_20pct, en_term;
int ret;
/*
* According to the "Termination when REG02[0] = 1" section of
* the bq24190 manual, the trickle charge could be less than the
* termination current so it recommends turning off the termination
* function.
*
* Note: AFAICT from the datasheet, the user will have to manually
* turn off the charging when in 20% mode. If its not turned off,
* there could be battery damage. So, use this mode at your own risk.
*/
switch (val->intval) {
case POWER_SUPPLY_CHARGE_TYPE_NONE:
chg_config = 0x0;
break;
case POWER_SUPPLY_CHARGE_TYPE_TRICKLE:
chg_config = 0x1;
force_20pct = 0x1;
en_term = 0x0;
break;
case POWER_SUPPLY_CHARGE_TYPE_FAST:
chg_config = 0x1;
force_20pct = 0x0;
en_term = 0x1;
break;
default:
return -EINVAL;
}
if (chg_config) { /* Enabling the charger */
ret = bq24190_write_mask(bdi, BQ24190_REG_CCC,
BQ24190_REG_CCC_FORCE_20PCT_MASK,
BQ24190_REG_CCC_FORCE_20PCT_SHIFT,
force_20pct);
if (ret < 0)
return ret;
ret = bq24190_write_mask(bdi, BQ24190_REG_CTTC,
BQ24190_REG_CTTC_EN_TERM_MASK,
BQ24190_REG_CTTC_EN_TERM_SHIFT,
en_term);
if (ret < 0)
return ret;
}
return bq24190_write_mask(bdi, BQ24190_REG_POC,
BQ24190_REG_POC_CHG_CONFIG_MASK,
BQ24190_REG_POC_CHG_CONFIG_SHIFT, chg_config);
}
static int bq24190_charger_get_health(struct bq24190_dev_info *bdi,
union power_supply_propval *val)
{
u8 v;
int health, ret;
mutex_lock(&bdi->f_reg_lock);
if (bdi->charger_health_valid) {
v = bdi->f_reg;
bdi->charger_health_valid = false;
mutex_unlock(&bdi->f_reg_lock);
} else {
mutex_unlock(&bdi->f_reg_lock);
ret = bq24190_read(bdi, BQ24190_REG_F, &v);
if (ret < 0)
return ret;
}
if (v & BQ24190_REG_F_BOOST_FAULT_MASK) {
/*
* This could be over-current or over-voltage but there's
* no way to tell which. Return 'OVERVOLTAGE' since there
* isn't an 'OVERCURRENT' value defined that we can return
* even if it was over-current.
*/
health = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
} else {
v &= BQ24190_REG_F_CHRG_FAULT_MASK;
v >>= BQ24190_REG_F_CHRG_FAULT_SHIFT;
switch (v) {
case 0x0: /* Normal */
health = POWER_SUPPLY_HEALTH_GOOD;
break;
case 0x1: /* Input Fault (VBUS OVP or VBAT<VBUS<3.8V) */
/*
* This could be over-voltage or under-voltage
* and there's no way to tell which. Instead
* of looking foolish and returning 'OVERVOLTAGE'
* when its really under-voltage, just return
* 'UNSPEC_FAILURE'.
*/
health = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
break;
case 0x2: /* Thermal Shutdown */
health = POWER_SUPPLY_HEALTH_OVERHEAT;
break;
case 0x3: /* Charge Safety Timer Expiration */
health = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE;
break;
default:
health = POWER_SUPPLY_HEALTH_UNKNOWN;
}
}
val->intval = health;
return 0;
}
static int bq24190_charger_get_online(struct bq24190_dev_info *bdi,
union power_supply_propval *val)
{
u8 v;
int ret;
ret = bq24190_read_mask(bdi, BQ24190_REG_SS,
BQ24190_REG_SS_PG_STAT_MASK,
BQ24190_REG_SS_PG_STAT_SHIFT, &v);
if (ret < 0)
return ret;
val->intval = v;
return 0;
}
static int bq24190_charger_get_current(struct bq24190_dev_info *bdi,
union power_supply_propval *val)
{
u8 v;
int curr, ret;
ret = bq24190_get_field_val(bdi, BQ24190_REG_CCC,
BQ24190_REG_CCC_ICHG_MASK, BQ24190_REG_CCC_ICHG_SHIFT,
bq24190_ccc_ichg_values,
ARRAY_SIZE(bq24190_ccc_ichg_values), &curr);
if (ret < 0)
return ret;
ret = bq24190_read_mask(bdi, BQ24190_REG_CCC,
BQ24190_REG_CCC_FORCE_20PCT_MASK,
BQ24190_REG_CCC_FORCE_20PCT_SHIFT, &v);
if (ret < 0)
return ret;
/* If FORCE_20PCT is enabled, then current is 20% of ICHG value */
if (v)
curr /= 5;
val->intval = curr;
return 0;
}
static int bq24190_charger_get_current_max(struct bq24190_dev_info *bdi,
union power_supply_propval *val)
{
int idx = ARRAY_SIZE(bq24190_ccc_ichg_values) - 1;
val->intval = bq24190_ccc_ichg_values[idx];
return 0;
}
static int bq24190_charger_set_current(struct bq24190_dev_info *bdi,
const union power_supply_propval *val)
{
u8 v;
int ret, curr = val->intval;
ret = bq24190_read_mask(bdi, BQ24190_REG_CCC,
BQ24190_REG_CCC_FORCE_20PCT_MASK,
BQ24190_REG_CCC_FORCE_20PCT_SHIFT, &v);
if (ret < 0)
return ret;
/* If FORCE_20PCT is enabled, have to multiply value passed in by 5 */
if (v)
curr *= 5;
return bq24190_set_field_val(bdi, BQ24190_REG_CCC,
BQ24190_REG_CCC_ICHG_MASK, BQ24190_REG_CCC_ICHG_SHIFT,
bq24190_ccc_ichg_values,
ARRAY_SIZE(bq24190_ccc_ichg_values), curr);
}
static int bq24190_charger_get_voltage(struct bq24190_dev_info *bdi,
union power_supply_propval *val)
{
int voltage, ret;
ret = bq24190_get_field_val(bdi, BQ24190_REG_CVC,
BQ24190_REG_CVC_VREG_MASK, BQ24190_REG_CVC_VREG_SHIFT,
bq24190_cvc_vreg_values,
ARRAY_SIZE(bq24190_cvc_vreg_values), &voltage);
if (ret < 0)
return ret;
val->intval = voltage;
return 0;
}
static int bq24190_charger_get_voltage_max(struct bq24190_dev_info *bdi,
union power_supply_propval *val)
{
int idx = ARRAY_SIZE(bq24190_cvc_vreg_values) - 1;
val->intval = bq24190_cvc_vreg_values[idx];
return 0;
}
static int bq24190_charger_set_voltage(struct bq24190_dev_info *bdi,
const union power_supply_propval *val)
{
return bq24190_set_field_val(bdi, BQ24190_REG_CVC,
BQ24190_REG_CVC_VREG_MASK, BQ24190_REG_CVC_VREG_SHIFT,
bq24190_cvc_vreg_values,
ARRAY_SIZE(bq24190_cvc_vreg_values), val->intval);
}
static int bq24190_charger_get_property(struct power_supply *psy,
enum power_supply_property psp, union power_supply_propval *val)
{
struct bq24190_dev_info *bdi =
container_of(psy, struct bq24190_dev_info, charger);
int ret;
dev_dbg(bdi->dev, "prop: %d\n", psp);
pm_runtime_get_sync(bdi->dev);
switch (psp) {
case POWER_SUPPLY_PROP_CHARGE_TYPE:
ret = bq24190_charger_get_charge_type(bdi, val);
break;
case POWER_SUPPLY_PROP_HEALTH:
ret = bq24190_charger_get_health(bdi, val);
break;
case POWER_SUPPLY_PROP_ONLINE:
ret = bq24190_charger_get_online(bdi, val);
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
ret = bq24190_charger_get_current(bdi, val);
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
ret = bq24190_charger_get_current_max(bdi, val);
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
ret = bq24190_charger_get_voltage(bdi, val);
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
ret = bq24190_charger_get_voltage_max(bdi, val);
break;
case POWER_SUPPLY_PROP_SCOPE:
val->intval = POWER_SUPPLY_SCOPE_SYSTEM;
ret = 0;
break;
case POWER_SUPPLY_PROP_MODEL_NAME:
val->strval = bdi->model_name;
ret = 0;
break;
case POWER_SUPPLY_PROP_MANUFACTURER:
val->strval = BQ24190_MANUFACTURER;
ret = 0;
break;
default:
ret = -ENODATA;
}
pm_runtime_put_sync(bdi->dev);
return ret;
}
static int bq24190_charger_set_property(struct power_supply *psy,
enum power_supply_property psp,
const union power_supply_propval *val)
{
struct bq24190_dev_info *bdi =
container_of(psy, struct bq24190_dev_info, charger);
int ret;
dev_dbg(bdi->dev, "prop: %d\n", psp);
pm_runtime_get_sync(bdi->dev);
switch (psp) {
case POWER_SUPPLY_PROP_CHARGE_TYPE:
ret = bq24190_charger_set_charge_type(bdi, val);
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
ret = bq24190_charger_set_current(bdi, val);
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
ret = bq24190_charger_set_voltage(bdi, val);
break;
default:
ret = -EINVAL;
}
pm_runtime_put_sync(bdi->dev);
return ret;
}
static int bq24190_charger_property_is_writeable(struct power_supply *psy,
enum power_supply_property psp)
{
int ret;
switch (psp) {
case POWER_SUPPLY_PROP_CHARGE_TYPE:
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
ret = 1;
break;
default:
ret = 0;
}
return ret;
}
static enum power_supply_property bq24190_charger_properties[] = {
POWER_SUPPLY_PROP_TYPE,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
POWER_SUPPLY_PROP_SCOPE,
POWER_SUPPLY_PROP_MODEL_NAME,
POWER_SUPPLY_PROP_MANUFACTURER,
};
static char *bq24190_charger_supplied_to[] = {
"main-battery",
};
static void bq24190_charger_init(struct power_supply *charger)
{
charger->name = "bq24190-charger";
charger->type = POWER_SUPPLY_TYPE_USB;
charger->properties = bq24190_charger_properties;
charger->num_properties = ARRAY_SIZE(bq24190_charger_properties);
charger->supplied_to = bq24190_charger_supplied_to;
charger->num_supplicants = ARRAY_SIZE(bq24190_charger_supplied_to);
charger->get_property = bq24190_charger_get_property;
charger->set_property = bq24190_charger_set_property;
charger->property_is_writeable = bq24190_charger_property_is_writeable;
}
/* Battery power supply property routines */
static int bq24190_battery_get_status(struct bq24190_dev_info *bdi,
union power_supply_propval *val)
{
u8 ss_reg, chrg_fault;
int status, ret;
mutex_lock(&bdi->f_reg_lock);
if (bdi->battery_status_valid) {
chrg_fault = bdi->f_reg;
bdi->battery_status_valid = false;
mutex_unlock(&bdi->f_reg_lock);
} else {
mutex_unlock(&bdi->f_reg_lock);
ret = bq24190_read(bdi, BQ24190_REG_F, &chrg_fault);
if (ret < 0)
return ret;
}
chrg_fault &= BQ24190_REG_F_CHRG_FAULT_MASK;
chrg_fault >>= BQ24190_REG_F_CHRG_FAULT_SHIFT;
ret = bq24190_read(bdi, BQ24190_REG_SS, &ss_reg);
if (ret < 0)
return ret;
/*
* The battery must be discharging when any of these are true:
* - there is no good power source;
* - there is a charge fault.
* Could also be discharging when in "supplement mode" but
* there is no way to tell when its in that mode.
*/
if (!(ss_reg & BQ24190_REG_SS_PG_STAT_MASK) || chrg_fault) {
status = POWER_SUPPLY_STATUS_DISCHARGING;
} else {
ss_reg &= BQ24190_REG_SS_CHRG_STAT_MASK;
ss_reg >>= BQ24190_REG_SS_CHRG_STAT_SHIFT;
switch (ss_reg) {
case 0x0: /* Not Charging */
status = POWER_SUPPLY_STATUS_NOT_CHARGING;
break;
case 0x1: /* Pre-charge */
case 0x2: /* Fast Charging */
status = POWER_SUPPLY_STATUS_CHARGING;
break;
case 0x3: /* Charge Termination Done */
status = POWER_SUPPLY_STATUS_FULL;
break;
default:
ret = -EIO;
}
}
if (!ret)
val->intval = status;
return ret;
}