summaryrefslogtreecommitdiff
path: root/sound/soc/codecs/twl4030.c
blob: 51848880504a38e6051072873422b94396fbd364 (plain)
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
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
/*
 * ALSA SoC TWL4030 codec driver
 *
 * Author:      Steve Sakoman, <steve@sakoman.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.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA
 *
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/i2c.h>
#include <linux/platform_device.h>
#include <linux/i2c/twl4030.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <sound/initval.h>
#include <sound/tlv.h>

#include "twl4030.h"

/*
 * twl4030 register cache & default register settings
 */
static const u8 twl4030_reg[TWL4030_CACHEREGNUM] = {
	0x00, /* this register not used		*/
	0x93, /* REG_CODEC_MODE		(0x1)	*/
	0xc3, /* REG_OPTION		(0x2)	*/
	0x00, /* REG_UNKNOWN		(0x3)	*/
	0x00, /* REG_MICBIAS_CTL	(0x4)	*/
	0x20, /* REG_ANAMICL		(0x5)	*/
	0x00, /* REG_ANAMICR		(0x6)	*/
	0x00, /* REG_AVADC_CTL		(0x7)	*/
	0x00, /* REG_ADCMICSEL		(0x8)	*/
	0x00, /* REG_DIGMIXING		(0x9)	*/
	0x0c, /* REG_ATXL1PGA		(0xA)	*/
	0x0c, /* REG_ATXR1PGA		(0xB)	*/
	0x00, /* REG_AVTXL2PGA		(0xC)	*/
	0x00, /* REG_AVTXR2PGA		(0xD)	*/
	0x01, /* REG_AUDIO_IF		(0xE)	*/
	0x00, /* REG_VOICE_IF		(0xF)	*/
	0x00, /* REG_ARXR1PGA		(0x10)	*/
	0x00, /* REG_ARXL1PGA		(0x11)	*/
	0x6c, /* REG_ARXR2PGA		(0x12)	*/
	0x6c, /* REG_ARXL2PGA		(0x13)	*/
	0x00, /* REG_VRXPGA		(0x14)	*/
	0x00, /* REG_VSTPGA		(0x15)	*/
	0x00, /* REG_VRX2ARXPGA		(0x16)	*/
	0x0c, /* REG_AVDAC_CTL		(0x17)	*/
	0x00, /* REG_ARX2VTXPGA		(0x18)	*/
	0x00, /* REG_ARXL1_APGA_CTL	(0x19)	*/
	0x00, /* REG_ARXR1_APGA_CTL	(0x1A)	*/
	0x4b, /* REG_ARXL2_APGA_CTL	(0x1B)	*/
	0x4b, /* REG_ARXR2_APGA_CTL	(0x1C)	*/
	0x00, /* REG_ATX2ARXPGA		(0x1D)	*/
	0x00, /* REG_BT_IF		(0x1E)	*/
	0x00, /* REG_BTPGA		(0x1F)	*/
	0x00, /* REG_BTSTPGA		(0x20)	*/
	0x00, /* REG_EAR_CTL		(0x21)	*/
	0x24, /* REG_HS_SEL		(0x22)	*/
	0x0a, /* REG_HS_GAIN_SET	(0x23)	*/
	0x00, /* REG_HS_POPN_SET	(0x24)	*/
	0x00, /* REG_PREDL_CTL		(0x25)	*/
	0x00, /* REG_PREDR_CTL		(0x26)	*/
	0x00, /* REG_PRECKL_CTL		(0x27)	*/
	0x00, /* REG_PRECKR_CTL		(0x28)	*/
	0x00, /* REG_HFL_CTL		(0x29)	*/
	0x00, /* REG_HFR_CTL		(0x2A)	*/
	0x00, /* REG_ALC_CTL		(0x2B)	*/
	0x00, /* REG_ALC_SET1		(0x2C)	*/
	0x00, /* REG_ALC_SET2		(0x2D)	*/
	0x00, /* REG_BOOST_CTL		(0x2E)	*/
	0x00, /* REG_SOFTVOL_CTL	(0x2F)	*/
	0x00, /* REG_DTMF_FREQSEL	(0x30)	*/
	0x00, /* REG_DTMF_TONEXT1H	(0x31)	*/
	0x00, /* REG_DTMF_TONEXT1L	(0x32)	*/
	0x00, /* REG_DTMF_TONEXT2H	(0x33)	*/
	0x00, /* REG_DTMF_TONEXT2L	(0x34)	*/
	0x00, /* REG_DTMF_TONOFF	(0x35)	*/
	0x00, /* REG_DTMF_WANONOFF	(0x36)	*/
	0x00, /* REG_I2S_RX_SCRAMBLE_H	(0x37)	*/
	0x00, /* REG_I2S_RX_SCRAMBLE_M	(0x38)	*/
	0x00, /* REG_I2S_RX_SCRAMBLE_L	(0x39)	*/
	0x16, /* REG_APLL_CTL		(0x3A)	*/
	0x00, /* REG_DTMF_CTL		(0x3B)	*/
	0x00, /* REG_DTMF_PGA_CTL2	(0x3C)	*/
	0x00, /* REG_DTMF_PGA_CTL1	(0x3D)	*/
	0x00, /* REG_MISC_SET_1		(0x3E)	*/
	0x00, /* REG_PCMBTMUX		(0x3F)	*/
	0x00, /* not used		(0x40)	*/
	0x00, /* not used		(0x41)	*/
	0x00, /* not used		(0x42)	*/
	0x00, /* REG_RX_PATH_SEL	(0x43)	*/
	0x00, /* REG_VDL_APGA_CTL	(0x44)	*/
	0x00, /* REG_VIBRA_CTL		(0x45)	*/
	0x00, /* REG_VIBRA_SET		(0x46)	*/
	0x00, /* REG_VIBRA_PWM_SET	(0x47)	*/
	0x00, /* REG_ANAMIC_GAIN	(0x48)	*/
	0x00, /* REG_MISC_SET_2		(0x49)	*/
};

/*
 * read twl4030 register cache
 */
static inline unsigned int twl4030_read_reg_cache(struct snd_soc_codec *codec,
	unsigned int reg)
{
	u8 *cache = codec->reg_cache;

	return cache[reg];
}

/*
 * write twl4030 register cache
 */
static inline void twl4030_write_reg_cache(struct snd_soc_codec *codec,
						u8 reg, u8 value)
{
	u8 *cache = codec->reg_cache;

	if (reg >= TWL4030_CACHEREGNUM)
		return;
	cache[reg] = value;
}

/*
 * write to the twl4030 register space
 */
static int twl4030_write(struct snd_soc_codec *codec,
			unsigned int reg, unsigned int value)
{
	twl4030_write_reg_cache(codec, reg, value);
	return twl4030_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE, value, reg);
}

static void twl4030_clear_codecpdz(struct snd_soc_codec *codec)
{
	u8 mode;

	mode = twl4030_read_reg_cache(codec, TWL4030_REG_CODEC_MODE);
	twl4030_write(codec, TWL4030_REG_CODEC_MODE,
		mode & ~TWL4030_CODECPDZ);

	/* REVISIT: this delay is present in TI sample drivers */
	/* but there seems to be no TRM requirement for it     */
	udelay(10);
}

static void twl4030_set_codecpdz(struct snd_soc_codec *codec)
{
	u8 mode;

	mode = twl4030_read_reg_cache(codec, TWL4030_REG_CODEC_MODE);
	twl4030_write(codec, TWL4030_REG_CODEC_MODE,
		mode | TWL4030_CODECPDZ);

	/* REVISIT: this delay is present in TI sample drivers */
	/* but there seems to be no TRM requirement for it     */
	udelay(10);
}

static void twl4030_init_chip(struct snd_soc_codec *codec)
{
	int i;

	/* clear CODECPDZ prior to setting register defaults */
	twl4030_clear_codecpdz(codec);

	/* set all audio section registers to reasonable defaults */
	for (i = TWL4030_REG_OPTION; i <= TWL4030_REG_MISC_SET_2; i++)
		twl4030_write(codec, i,	twl4030_reg[i]);

}

/* Earpiece */
static const char *twl4030_earpiece_texts[] =
		{"Off", "DACL1", "DACL2", "Invalid", "DACR1"};

static const struct soc_enum twl4030_earpiece_enum =
	SOC_ENUM_SINGLE(TWL4030_REG_EAR_CTL, 1,
			ARRAY_SIZE(twl4030_earpiece_texts),
			twl4030_earpiece_texts);

static const struct snd_kcontrol_new twl4030_dapm_earpiece_control =
SOC_DAPM_ENUM("Route", twl4030_earpiece_enum);

/* PreDrive Left */
static const char *twl4030_predrivel_texts[] =
		{"Off", "DACL1", "DACL2", "Invalid", "DACR2"};

static const struct soc_enum twl4030_predrivel_enum =
	SOC_ENUM_SINGLE(TWL4030_REG_PREDL_CTL, 1,
			ARRAY_SIZE(twl4030_predrivel_texts),
			twl4030_predrivel_texts);

static const struct snd_kcontrol_new twl4030_dapm_predrivel_control =
SOC_DAPM_ENUM("Route", twl4030_predrivel_enum);

/* PreDrive Right */
static const char *twl4030_predriver_texts[] =
		{"Off", "DACR1", "DACR2", "Invalid", "DACL2"};

static const struct soc_enum twl4030_predriver_enum =
	SOC_ENUM_SINGLE(TWL4030_REG_PREDR_CTL, 1,
			ARRAY_SIZE(twl4030_predriver_texts),
			twl4030_predriver_texts);

static const struct snd_kcontrol_new twl4030_dapm_predriver_control =
SOC_DAPM_ENUM("Route", twl4030_predriver_enum);

/* Headset Left */
static const char *twl4030_hsol_texts[] =
		{"Off", "DACL1", "DACL2"};

static const struct soc_enum twl4030_hsol_enum =
	SOC_ENUM_SINGLE(TWL4030_REG_HS_SEL, 1,
			ARRAY_SIZE(twl4030_hsol_texts),
			twl4030_hsol_texts);

static const struct snd_kcontrol_new twl4030_dapm_hsol_control =
SOC_DAPM_ENUM("Route", twl4030_hsol_enum);

/* Headset Right */
static const char *twl4030_hsor_texts[] =
		{"Off", "DACR1", "DACR2"};

static const struct soc_enum twl4030_hsor_enum =
	SOC_ENUM_SINGLE(TWL4030_REG_HS_SEL, 4,
			ARRAY_SIZE(twl4030_hsor_texts),
			twl4030_hsor_texts);

static const struct snd_kcontrol_new twl4030_dapm_hsor_control =
SOC_DAPM_ENUM("Route", twl4030_hsor_enum);

/* Carkit Left */
static const char *twl4030_carkitl_texts[] =
		{"Off", "DACL1", "DACL2"};

static const struct soc_enum twl4030_carkitl_enum =
	SOC_ENUM_SINGLE(TWL4030_REG_PRECKL_CTL, 1,
			ARRAY_SIZE(twl4030_carkitl_texts),
			twl4030_carkitl_texts);

static const struct snd_kcontrol_new twl4030_dapm_carkitl_control =
SOC_DAPM_ENUM("Route", twl4030_carkitl_enum);

/* Carkit Right */
static const char *twl4030_carkitr_texts[] =
		{"Off", "DACR1", "DACR2"};

static const struct soc_enum twl4030_carkitr_enum =
	SOC_ENUM_SINGLE(TWL4030_REG_PRECKR_CTL, 1,
			ARRAY_SIZE(twl4030_carkitr_texts),
			twl4030_carkitr_texts);

static const struct snd_kcontrol_new twl4030_dapm_carkitr_control =
SOC_DAPM_ENUM("Route", twl4030_carkitr_enum);

/* Handsfree Left */
static const char *twl4030_handsfreel_texts[] =
		{"Voice", "DACL1", "DACL2", "DACR2"};

static const struct soc_enum twl4030_handsfreel_enum =
	SOC_ENUM_SINGLE(TWL4030_REG_HFL_CTL, 0,
			ARRAY_SIZE(twl4030_handsfreel_texts),
			twl4030_handsfreel_texts);

static const struct snd_kcontrol_new twl4030_dapm_handsfreel_control =
SOC_DAPM_ENUM("Route", twl4030_handsfreel_enum);

/* Handsfree Right */
static const char *twl4030_handsfreer_texts[] =
		{"Voice", "DACR1", "DACR2", "DACL2"};

static const struct soc_enum twl4030_handsfreer_enum =
	SOC_ENUM_SINGLE(TWL4030_REG_HFR_CTL, 0,
			ARRAY_SIZE(twl4030_handsfreer_texts),
			twl4030_handsfreer_texts);

static const struct snd_kcontrol_new twl4030_dapm_handsfreer_control =
SOC_DAPM_ENUM("Route", twl4030_handsfreer_enum);

static int outmixer_event(struct snd_soc_dapm_widget *w,
	struct snd_kcontrol *kcontrol, int event)
{
	struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
	int ret = 0;
	int val;

	switch (e->reg) {
	case TWL4030_REG_PREDL_CTL:
	case TWL4030_REG_PREDR_CTL:
	case TWL4030_REG_EAR_CTL:
		val = w->value >> e->shift_l;
		if (val == 3) {
			printk(KERN_WARNING
			"Invalid MUX setting for register 0x%02x (%d)\n",
			      e->reg, val);
			ret = -1;
		}
		break;
	}

	return ret;
}

static int handsfree_event(struct snd_soc_dapm_widget *w,
		struct snd_kcontrol *kcontrol, int event)
{
	struct soc_enum *e = (struct soc_enum *)w->kcontrols->private_value;
	unsigned char hs_ctl;

	hs_ctl = twl4030_read_reg_cache(w->codec, e->reg);

	if (hs_ctl & TWL4030_HF_CTL_REF_EN) {
		hs_ctl |= TWL4030_HF_CTL_RAMP_EN;
		twl4030_write(w->codec, e->reg, hs_ctl);
		hs_ctl |= TWL4030_HF_CTL_LOOP_EN;
		twl4030_write(w->codec, e->reg, hs_ctl);
		hs_ctl |= TWL4030_HF_CTL_HB_EN;
		twl4030_write(w->codec, e->reg, hs_ctl);
	} else {
		hs_ctl &= ~(TWL4030_HF_CTL_RAMP_EN | TWL4030_HF_CTL_LOOP_EN
				| TWL4030_HF_CTL_HB_EN);
		twl4030_write(w->codec, e->reg, hs_ctl);
	}

	return 0;
}

/*
 * Some of the gain controls in TWL (mostly those which are associated with
 * the outputs) are implemented in an interesting way:
 * 0x0 : Power down (mute)
 * 0x1 : 6dB
 * 0x2 : 0 dB
 * 0x3 : -6 dB
 * Inverting not going to help with these.
 * Custom volsw and volsw_2r get/put functions to handle these gain bits.
 */
#define SOC_DOUBLE_TLV_TWL4030(xname, xreg, shift_left, shift_right, xmax,\
			       xinvert, tlv_array) \
{	.iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = (xname),\
	.access = SNDRV_CTL_ELEM_ACCESS_TLV_READ |\
		 SNDRV_CTL_ELEM_ACCESS_READWRITE,\
	.tlv.p = (tlv_array), \
	.info = snd_soc_info_volsw, \
	.get = snd_soc_get_volsw_twl4030, \
	.put = snd_soc_put_volsw_twl4030, \
	.private_value = (unsigned long)&(struct soc_mixer_control) \
		{.reg = xreg, .shift = shift_left, .rshift = shift_right,\
		 .max = xmax, .invert = xinvert} }
#define SOC_DOUBLE_R_TLV_TWL4030(xname, reg_left, reg_right, xshift, xmax,\
				 xinvert, tlv_array) \
{	.iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = (xname),\
	.access = SNDRV_CTL_ELEM_ACCESS_TLV_READ |\
		 SNDRV_CTL_ELEM_ACCESS_READWRITE,\
	.tlv.p = (tlv_array), \
	.info = snd_soc_info_volsw_2r, \
	.get = snd_soc_get_volsw_r2_twl4030,\
	.put = snd_soc_put_volsw_r2_twl4030, \
	.private_value = (unsigned long)&(struct soc_mixer_control) \
		{.reg = reg_left, .rreg = reg_right, .shift = xshift, \
		 .rshift = xshift, .max = xmax, .invert = xinvert} }
#define SOC_SINGLE_TLV_TWL4030(xname, xreg, xshift, xmax, xinvert, tlv_array) \
	SOC_DOUBLE_TLV_TWL4030(xname, xreg, xshift, xshift, xmax, \
			       xinvert, tlv_array)

static int snd_soc_get_volsw_twl4030(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
	unsigned int reg = mc->reg;
	unsigned int shift = mc->shift;
	unsigned int rshift = mc->rshift;
	int max = mc->max;
	int mask = (1 << fls(max)) - 1;

	ucontrol->value.integer.value[0] =
		(snd_soc_read(codec, reg) >> shift) & mask;
	if (ucontrol->value.integer.value[0])
		ucontrol->value.integer.value[0] =
			max + 1 - ucontrol->value.integer.value[0];

	if (shift != rshift) {
		ucontrol->value.integer.value[1] =
			(snd_soc_read(codec, reg) >> rshift) & mask;
		if (ucontrol->value.integer.value[1])
			ucontrol->value.integer.value[1] =
				max + 1 - ucontrol->value.integer.value[1];
	}

	return 0;
}

static int snd_soc_put_volsw_twl4030(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
	unsigned int reg = mc->reg;
	unsigned int shift = mc->shift;
	unsigned int rshift = mc->rshift;
	int max = mc->max;
	int mask = (1 << fls(max)) - 1;
	unsigned short val, val2, val_mask;

	val = (ucontrol->value.integer.value[0] & mask);

	val_mask = mask << shift;
	if (val)
		val = max + 1 - val;
	val = val << shift;
	if (shift != rshift) {
		val2 = (ucontrol->value.integer.value[1] & mask);
		val_mask |= mask << rshift;
		if (val2)
			val2 = max + 1 - val2;
		val |= val2 << rshift;
	}
	return snd_soc_update_bits(codec, reg, val_mask, val);
}

static int snd_soc_get_volsw_r2_twl4030(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
	unsigned int reg = mc->reg;
	unsigned int reg2 = mc->rreg;
	unsigned int shift = mc->shift;
	int max = mc->max;
	int mask = (1<<fls(max))-1;

	ucontrol->value.integer.value[0] =
		(snd_soc_read(codec, reg) >> shift) & mask;
	ucontrol->value.integer.value[1] =
		(snd_soc_read(codec, reg2) >> shift) & mask;

	if (ucontrol->value.integer.value[0])
		ucontrol->value.integer.value[0] =
			max + 1 - ucontrol->value.integer.value[0];
	if (ucontrol->value.integer.value[1])
		ucontrol->value.integer.value[1] =
			max + 1 - ucontrol->value.integer.value[1];

	return 0;
}

static int snd_soc_put_volsw_r2_twl4030(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
	unsigned int reg = mc->reg;
	unsigned int reg2 = mc->rreg;
	unsigned int shift = mc->shift;
	int max = mc->max;
	int mask = (1 << fls(max)) - 1;
	int err;
	unsigned short val, val2, val_mask;

	val_mask = mask << shift;
	val = (ucontrol->value.integer.value[0] & mask);
	val2 = (ucontrol->value.integer.value[1] & mask);

	if (val)
		val = max + 1 - val;
	if (val2)
		val2 = max + 1 - val2;

	val = val << shift;
	val2 = val2 << shift;

	err = snd_soc_update_bits(codec, reg, val_mask, val);
	if (err < 0)
		return err;

	err = snd_soc_update_bits(codec, reg2, val_mask, val2);
	return err;
}

static int twl4030_get_left_input(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_codec *codec = kcontrol->private_data;
	u8 reg = twl4030_read_reg_cache(codec, TWL4030_REG_ANAMICL);
	int result = 0;

	/* one bit must be set a time */
	reg &= TWL4030_CKMIC_EN | TWL4030_AUXL_EN | TWL4030_HSMIC_EN
			| TWL4030_MAINMIC_EN;
	if (reg != 0) {
		result++;
		while ((reg & 1) == 0) {
			result++;
			reg >>= 1;
		}
	}

	ucontrol->value.integer.value[0] = result;
	return 0;
}

static int twl4030_put_left_input(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_codec *codec = kcontrol->private_data;
	int value = ucontrol->value.integer.value[0];
	u8 anamicl, micbias, avadc_ctl;

	anamicl = twl4030_read_reg_cache(codec, TWL4030_REG_ANAMICL);
	anamicl &= ~(TWL4030_CKMIC_EN | TWL4030_AUXL_EN | TWL4030_HSMIC_EN
			| TWL4030_MAINMIC_EN);
	micbias = twl4030_read_reg_cache(codec, TWL4030_REG_MICBIAS_CTL);
	micbias &= ~(TWL4030_HSMICBIAS_EN | TWL4030_MICBIAS1_EN);
	avadc_ctl = twl4030_read_reg_cache(codec, TWL4030_REG_AVADC_CTL);

	switch (value) {
	case 1:
		anamicl |= TWL4030_MAINMIC_EN;
		micbias |= TWL4030_MICBIAS1_EN;
		break;
	case 2:
		anamicl |= TWL4030_HSMIC_EN;
		micbias |= TWL4030_HSMICBIAS_EN;
		break;
	case 3:
		anamicl |= TWL4030_AUXL_EN;
		break;
	case 4:
		anamicl |= TWL4030_CKMIC_EN;
		break;
	default:
		break;
	}

	/* If some input is selected, enable amp and ADC */
	if (value != 0) {
		anamicl |= TWL4030_MICAMPL_EN;
		avadc_ctl |= TWL4030_ADCL_EN;
	} else {
		anamicl &= ~TWL4030_MICAMPL_EN;
		avadc_ctl &= ~TWL4030_ADCL_EN;
	}

	twl4030_write(codec, TWL4030_REG_ANAMICL, anamicl);
	twl4030_write(codec, TWL4030_REG_MICBIAS_CTL, micbias);
	twl4030_write(codec, TWL4030_REG_AVADC_CTL, avadc_ctl);

	return 1;
}

static int twl4030_get_right_input(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_codec *codec = kcontrol->private_data;
	u8 reg = twl4030_read_reg_cache(codec, TWL4030_REG_ANAMICR);
	int value = 0;

	reg &= TWL4030_SUBMIC_EN|TWL4030_AUXR_EN;
	switch (reg) {
	case TWL4030_SUBMIC_EN:
		value = 1;
		break;
	case TWL4030_AUXR_EN:
		value = 2;
		break;
	default:
		break;
	}

	ucontrol->value.integer.value[0] = value;
	return 0;
}

static int twl4030_put_right_input(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_codec *codec = kcontrol->private_data;
	int value = ucontrol->value.integer.value[0];
	u8 anamicr, micbias, avadc_ctl;

	anamicr = twl4030_read_reg_cache(codec, TWL4030_REG_ANAMICR);
	anamicr &= ~(TWL4030_SUBMIC_EN|TWL4030_AUXR_EN);
	micbias = twl4030_read_reg_cache(codec, TWL4030_REG_MICBIAS_CTL);
	micbias &= ~TWL4030_MICBIAS2_EN;
	avadc_ctl = twl4030_read_reg_cache(codec, TWL4030_REG_AVADC_CTL);

	switch (value) {
	case 1:
		anamicr |= TWL4030_SUBMIC_EN;
		micbias |= TWL4030_MICBIAS2_EN;
		break;
	case 2:
		anamicr |= TWL4030_AUXR_EN;
		break;
	default:
		break;
	}

	if (value != 0) {
		anamicr |= TWL4030_MICAMPR_EN;
		avadc_ctl |= TWL4030_ADCR_EN;
	} else {
		anamicr &= ~TWL4030_MICAMPR_EN;
		avadc_ctl &= ~TWL4030_ADCR_EN;
	}

	twl4030_write(codec, TWL4030_REG_ANAMICR, anamicr);
	twl4030_write(codec, TWL4030_REG_MICBIAS_CTL, micbias);
	twl4030_write(codec, TWL4030_REG_AVADC_CTL, avadc_ctl);

	return 1;
}

static const char *twl4030_left_in_sel[] = {
	"None",
	"Main Mic",
	"Headset Mic",
	"Line In",
	"Carkit Mic",
};

static const char *twl4030_right_in_sel[] = {
	"None",
	"Sub Mic",
	"Line In",
};

static const struct soc_enum twl4030_left_input_mux =
	SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(twl4030_left_in_sel),
		twl4030_left_in_sel);

static const struct soc_enum twl4030_right_input_mux =
	SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(twl4030_right_in_sel),
		twl4030_right_in_sel);

/*
 * FGAIN volume control:
 * from -62 to 0 dB in 1 dB steps (mute instead of -63 dB)
 */
static DECLARE_TLV_DB_SCALE(digital_fine_tlv, -6300, 100, 1);

/*
 * CGAIN volume control:
 * 0 dB to 12 dB in 6 dB steps
 * value 2 and 3 means 12 dB
 */
static DECLARE_TLV_DB_SCALE(digital_coarse_tlv, 0, 600, 0);

/*
 * Analog playback gain
 * -24 dB to 12 dB in 2 dB steps
 */
static DECLARE_TLV_DB_SCALE(analog_tlv, -2400, 200, 0);

/*
 * Gain controls tied to outputs
 * -6 dB to 6 dB in 6 dB steps (mute instead of -12)
 */
static DECLARE_TLV_DB_SCALE(output_tvl, -1200, 600, 1);

/*
 * Capture gain after the ADCs
 * from 0 dB to 31 dB in 1 dB steps
 */
static DECLARE_TLV_DB_SCALE(digital_capture_tlv, 0, 100, 0);

/*
 * Gain control for input amplifiers
 * 0 dB to 30 dB in 6 dB steps
 */
static DECLARE_TLV_DB_SCALE(input_gain_tlv, 0, 600, 0);

static const struct snd_kcontrol_new twl4030_snd_controls[] = {
	/* Common playback gain controls */
	SOC_DOUBLE_R_TLV("DAC1 Digital Fine Playback Volume",
		TWL4030_REG_ARXL1PGA, TWL4030_REG_ARXR1PGA,
		0, 0x3f, 0, digital_fine_tlv),
	SOC_DOUBLE_R_TLV("DAC2 Digital Fine Playback Volume",
		TWL4030_REG_ARXL2PGA, TWL4030_REG_ARXR2PGA,
		0, 0x3f, 0, digital_fine_tlv),

	SOC_DOUBLE_R_TLV("DAC1 Digital Coarse Playback Volume",
		TWL4030_REG_ARXL1PGA, TWL4030_REG_ARXR1PGA,
		6, 0x2, 0, digital_coarse_tlv),
	SOC_DOUBLE_R_TLV("DAC2 Digital Coarse Playback Volume",
		TWL4030_REG_ARXL2PGA, TWL4030_REG_ARXR2PGA,
		6, 0x2, 0, digital_coarse_tlv),

	SOC_DOUBLE_R_TLV("DAC1 Analog Playback Volume",
		TWL4030_REG_ARXL1_APGA_CTL, TWL4030_REG_ARXR1_APGA_CTL,
		3, 0x12, 1, analog_tlv),
	SOC_DOUBLE_R_TLV("DAC2 Analog Playback Volume",
		TWL4030_REG_ARXL2_APGA_CTL, TWL4030_REG_ARXR2_APGA_CTL,
		3, 0x12, 1, analog_tlv),
	SOC_DOUBLE_R("DAC1 Analog Playback Switch",
		TWL4030_REG_ARXL1_APGA_CTL, TWL4030_REG_ARXR1_APGA_CTL,
		1, 1, 0),
	SOC_DOUBLE_R("DAC2 Analog Playback Switch",
		TWL4030_REG_ARXL2_APGA_CTL, TWL4030_REG_ARXR2_APGA_CTL,
		1, 1, 0),

	/* Separate output gain controls */
	SOC_DOUBLE_R_TLV_TWL4030("PreDriv Playback Volume",
		TWL4030_REG_PREDL_CTL, TWL4030_REG_PREDR_CTL,
		4, 3, 0, output_tvl),

	SOC_DOUBLE_TLV_TWL4030("Headset Playback Volume",
		TWL4030_REG_HS_GAIN_SET, 0, 2, 3, 0, output_tvl),

	SOC_DOUBLE_R_TLV_TWL4030("Carkit Playback Volume",
		TWL4030_REG_PRECKL_CTL, TWL4030_REG_PRECKR_CTL,
		4, 3, 0, output_tvl),

	SOC_SINGLE_TLV_TWL4030("Earpiece Playback Volume",
		TWL4030_REG_EAR_CTL, 4, 3, 0, output_tvl),

	/* Common capture gain controls */
	SOC_DOUBLE_R_TLV("Capture Volume",
		TWL4030_REG_ATXL1PGA, TWL4030_REG_ATXR1PGA,
		0, 0x1f, 0, digital_capture_tlv),

	SOC_DOUBLE_TLV("Input Boost Volume", TWL4030_REG_ANAMIC_GAIN,
		0, 3, 5, 0, input_gain_tlv),

	/* Input source controls */
	SOC_ENUM_EXT("Left Input Source", twl4030_left_input_mux,
		twl4030_get_left_input, twl4030_put_left_input),
	SOC_ENUM_EXT("Right Input Source", twl4030_right_input_mux,
		twl4030_get_right_input, twl4030_put_right_input),
};

/* add non dapm controls */
static int twl4030_add_controls(struct snd_soc_codec *codec)
{
	int err, i;

	for (i = 0; i < ARRAY_SIZE(twl4030_snd_controls); i++) {
		err = snd_ctl_add(codec->card,
				  snd_soc_cnew(&twl4030_snd_controls[i],
						codec, NULL));
		if (err < 0)
			return err;
	}

	return 0;
}

static const struct snd_soc_dapm_widget twl4030_dapm_widgets[] = {
	SND_SOC_DAPM_INPUT("INL"),
	SND_SOC_DAPM_INPUT("INR"),

	SND_SOC_DAPM_OUTPUT("OUTL"),
	SND_SOC_DAPM_OUTPUT("OUTR"),
	SND_SOC_DAPM_OUTPUT("EARPIECE"),
	SND_SOC_DAPM_OUTPUT("PREDRIVEL"),
	SND_SOC_DAPM_OUTPUT("PREDRIVER"),
	SND_SOC_DAPM_OUTPUT("HSOL"),
	SND_SOC_DAPM_OUTPUT("HSOR"),
	SND_SOC_DAPM_OUTPUT("CARKITL"),
	SND_SOC_DAPM_OUTPUT("CARKITR"),
	SND_SOC_DAPM_OUTPUT("HFL"),
	SND_SOC_DAPM_OUTPUT("HFR"),

	/* DACs */
	SND_SOC_DAPM_DAC("DAC Right1", "Right Front Playback",
			TWL4030_REG_AVDAC_CTL, 0, 0),
	SND_SOC_DAPM_DAC("DAC Left1", "Left Front Playback",
			TWL4030_REG_AVDAC_CTL, 1, 0),
	SND_SOC_DAPM_DAC("DAC Right2", "Right Rear Playback",
			TWL4030_REG_AVDAC_CTL, 2, 0),
	SND_SOC_DAPM_DAC("DAC Left2", "Left Rear Playback",
			TWL4030_REG_AVDAC_CTL, 3, 0),

	/* Analog PGAs */
	SND_SOC_DAPM_PGA("ARXR1_APGA", TWL4030_REG_ARXR1_APGA_CTL,
			0, 0, NULL, 0),
	SND_SOC_DAPM_PGA("ARXL1_APGA", TWL4030_REG_ARXL1_APGA_CTL,
			0, 0, NULL, 0),
	SND_SOC_DAPM_PGA("ARXR2_APGA", TWL4030_REG_ARXR2_APGA_CTL,
			0, 0, NULL, 0),
	SND_SOC_DAPM_PGA("ARXL2_APGA", TWL4030_REG_ARXL2_APGA_CTL,
			0, 0, NULL, 0),

	/* Output MUX controls */
	/* Earpiece */
	SND_SOC_DAPM_MUX_E("Earpiece Mux", SND_SOC_NOPM, 0, 0,
		&twl4030_dapm_earpiece_control, outmixer_event,
		SND_SOC_DAPM_PRE_REG),
	/* PreDrivL/R */
	SND_SOC_DAPM_MUX_E("PredriveL Mux", SND_SOC_NOPM, 0, 0,
		&twl4030_dapm_predrivel_control, outmixer_event,
		SND_SOC_DAPM_PRE_REG),
	SND_SOC_DAPM_MUX_E("PredriveR Mux", SND_SOC_NOPM, 0, 0,
		&twl4030_dapm_predriver_control, outmixer_event,
		SND_SOC_DAPM_PRE_REG),
	/* HeadsetL/R */
	SND_SOC_DAPM_MUX("HeadsetL Mux", SND_SOC_NOPM, 0, 0,
		&twl4030_dapm_hsol_control),
	SND_SOC_DAPM_MUX("HeadsetR Mux", SND_SOC_NOPM, 0, 0,
		&twl4030_dapm_hsor_control),
	/* CarkitL/R */
	SND_SOC_DAPM_MUX("CarkitL Mux", SND_SOC_NOPM, 0, 0,
		&twl4030_dapm_carkitl_control),
	SND_SOC_DAPM_MUX("CarkitR Mux", SND_SOC_NOPM, 0, 0,
		&twl4030_dapm_carkitr_control),
	/* HandsfreeL/R */
	SND_SOC_DAPM_MUX_E("HandsfreeL Mux", TWL4030_REG_HFL_CTL, 5, 0,
		&twl4030_dapm_handsfreel_control, handsfree_event,
		SND_SOC_DAPM_POST_PMU|SND_SOC_DAPM_POST_PMD),
	SND_SOC_DAPM_MUX_E("HandsfreeR Mux", TWL4030_REG_HFR_CTL, 5, 0,
		&twl4030_dapm_handsfreer_control, handsfree_event,
		SND_SOC_DAPM_POST_PMU|SND_SOC_DAPM_POST_PMD),

	SND_SOC_DAPM_ADC("ADCL", "Left Capture", SND_SOC_NOPM, 0, 0),
	SND_SOC_DAPM_ADC("ADCR", "Right Capture", SND_SOC_NOPM, 0, 0),
};

static const struct snd_soc_dapm_route intercon[] = {
	{"ARXL1_APGA", NULL, "DAC Left1"},
	{"ARXR1_APGA", NULL, "DAC Right1"},
	{"ARXL2_APGA", NULL, "DAC Left2"},
	{"ARXR2_APGA", NULL, "DAC Right2"},

	/* Internal playback routings */
	/* Earpiece */
	{"Earpiece Mux", "DACL1", "ARXL1_APGA"},
	{"Earpiece Mux", "DACL2", "ARXL2_APGA"},
	{"Earpiece Mux", "DACR1", "ARXR1_APGA"},
	/* PreDrivL */
	{"PredriveL Mux", "DACL1", "ARXL1_APGA"},
	{"PredriveL Mux", "DACL2", "ARXL2_APGA"},
	{"PredriveL Mux", "DACR2", "ARXR2_APGA"},
	/* PreDrivR */
	{"PredriveR Mux", "DACR1", "ARXR1_APGA"},
	{"PredriveR Mux", "DACR2", "ARXR2_APGA"},
	{"PredriveR Mux", "DACL2", "ARXL2_APGA"},
	/* HeadsetL */
	{"HeadsetL Mux", "DACL1", "ARXL1_APGA"},
	{"HeadsetL Mux", "DACL2", "ARXL2_APGA"},
	/* HeadsetR */
	{"HeadsetR Mux", "DACR1", "ARXR1_APGA"},
	{"HeadsetR Mux", "DACR2", "ARXR2_APGA"},
	/* CarkitL */
	{"CarkitL Mux", "DACL1", "ARXL1_APGA"},
	{"CarkitL Mux", "DACL2", "ARXL2_APGA"},
	/* CarkitR */
	{"CarkitR Mux", "DACR1", "ARXR1_APGA"},
	{"CarkitR Mux", "DACR2", "ARXR2_APGA"},
	/* HandsfreeL */
	{"HandsfreeL Mux", "DACL1", "ARXL1_APGA"},
	{"HandsfreeL Mux", "DACL2", "ARXL2_APGA"},
	{"HandsfreeL Mux", "DACR2", "ARXR2_APGA"},
	/* HandsfreeR */
	{"HandsfreeR Mux", "DACR1", "ARXR1_APGA"},
	{"HandsfreeR Mux", "DACR2", "ARXR2_APGA"},
	{"HandsfreeR Mux", "DACL2", "ARXL2_APGA"},

	/* outputs */
	{"OUTL", NULL, "ARXL2_APGA"},
	{"OUTR", NULL, "ARXR2_APGA"},
	{"EARPIECE", NULL, "Earpiece Mux"},
	{"PREDRIVEL", NULL, "PredriveL Mux"},
	{"PREDRIVER", NULL, "PredriveR Mux"},
	{"HSOL", NULL, "HeadsetL Mux"},
	{"HSOR", NULL, "HeadsetR Mux"},
	{"CARKITL", NULL, "CarkitL Mux"},
	{"CARKITR", NULL, "CarkitR Mux"},
	{"HFL", NULL, "HandsfreeL Mux"},
	{"HFR", NULL, "HandsfreeR Mux"},

	/* inputs */
	{"ADCL", NULL, "INL"},
	{"ADCR", NULL, "INR"},
};

static int twl4030_add_widgets(struct snd_soc_codec *codec)
{
	snd_soc_dapm_new_controls(codec, twl4030_dapm_widgets,
				 ARRAY_SIZE(twl4030_dapm_widgets));

	snd_soc_dapm_add_routes(codec, intercon, ARRAY_SIZE(intercon));

	snd_soc_dapm_new_widgets(codec);
	return 0;
}

static void twl4030_power_up(struct snd_soc_codec *codec)
{
	u8 anamicl, regmisc1, byte, popn;
	int i = 0;

	/* set CODECPDZ to turn on codec */
	twl4030_set_codecpdz(codec);

	/* initiate offset cancellation */
	anamicl = twl4030_read_reg_cache(codec, TWL4030_REG_ANAMICL);
	twl4030_write(codec, TWL4030_REG_ANAMICL,
		anamicl | TWL4030_CNCL_OFFSET_START);

	/* wait for offset cancellation to complete */
	do {
		/* this takes a little while, so don't slam i2c */
		udelay(2000);
		twl4030_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE, &byte,
				    TWL4030_REG_ANAMICL);
	} while ((i++ < 100) &&
		 ((byte & TWL4030_CNCL_OFFSET_START) ==
		  TWL4030_CNCL_OFFSET_START));

	/* anti-pop when changing analog gain */
	regmisc1 = twl4030_read_reg_cache(codec, TWL4030_REG_MISC_SET_1);
	twl4030_write(codec, TWL4030_REG_MISC_SET_1,
		regmisc1 | TWL4030_SMOOTH_ANAVOL_EN);

	/* toggle CODECPDZ as per TRM */
	twl4030_clear_codecpdz(codec);
	twl4030_set_codecpdz(codec);

	/* program anti-pop with bias ramp delay */
	popn = twl4030_read_reg_cache(codec, TWL4030_REG_HS_POPN_SET);
	popn &= TWL4030_RAMP_DELAY;
	popn |=	TWL4030_RAMP_DELAY_645MS;
	twl4030_write(codec, TWL4030_REG_HS_POPN_SET, popn);
	popn |=	TWL4030_VMID_EN;
	twl4030_write(codec, TWL4030_REG_HS_POPN_SET, popn);

	/* enable anti-pop ramp */
	popn |= TWL4030_RAMP_EN;
	twl4030_write(codec, TWL4030_REG_HS_POPN_SET, popn);
}

static void twl4030_power_down(struct snd_soc_codec *codec)
{
	u8 popn;

	/* disable anti-pop ramp */
	popn = twl4030_read_reg_cache(codec, TWL4030_REG_HS_POPN_SET);
	popn &= ~TWL4030_RAMP_EN;
	twl4030_write(codec, TWL4030_REG_HS_POPN_SET, popn);

	/* disable bias out */
	popn &= ~TWL4030_VMID_EN;
	twl4030_write(codec, TWL4030_REG_HS_POPN_SET, popn);

	/* power down */
	twl4030_clear_codecpdz(codec);
}

static int twl4030_set_bias_level(struct snd_soc_codec *codec,
				  enum snd_soc_bias_level level)
{
	switch (level) {
	case SND_SOC_BIAS_ON:
		twl4030_power_up(codec);
		break;
	case SND_SOC_BIAS_PREPARE:
		/* TODO: develop a twl4030_prepare function */
		break;
	case SND_SOC_BIAS_STANDBY:
		/* TODO: develop a twl4030_standby function */
		twl4030_power_down(codec);
		break;
	case SND_SOC_BIAS_OFF:
		twl4030_power_down(codec);
		break;
	}
	codec->bias_level = level;

	return 0;
}

static int twl4030_hw_params(struct snd_pcm_substream *substream,
			   struct snd_pcm_hw_params *params,
			   struct snd_soc_dai *dai)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_device *socdev = rtd->socdev;
	struct snd_soc_codec *codec = socdev->codec;
	u8 mode, old_mode, format, old_format;


	/* bit rate */
	old_mode = twl4030_read_reg_cache(codec,
			TWL4030_REG_CODEC_MODE) & ~TWL4030_CODECPDZ;
	mode = old_mode & ~TWL4030_APLL_RATE;

	switch (params_rate(params)) {
	case 8000:
		mode |= TWL4030_APLL_RATE_8000;
		break;
	case 11025:
		mode |= TWL4030_APLL_RATE_11025;
		break;
	case 12000:
		mode |= TWL4030_APLL_RATE_12000;
		break;
	case 16000:
		mode |= TWL4030_APLL_RATE_16000;
		break;
	case 22050:
		mode |= TWL4030_APLL_RATE_22050;
		break;
	case 24000:
		mode |= TWL4030_APLL_RATE_24000;
		break;
	case 32000:
		mode |= TWL4030_APLL_RATE_32000;
		break;
	case 44100:
		mode |= TWL4030_APLL_RATE_44100;
		break;
	case 48000:
		mode |= TWL4030_APLL_RATE_48000;
		break;
	default:
		printk(KERN_ERR "TWL4030 hw params: unknown rate %d\n",
			params_rate(params));
		return -EINVAL;
	}

	if (mode != old_mode) {
		/* change rate and set CODECPDZ */
		twl4030_write(codec, TWL4030_REG_CODEC_MODE, mode);
		twl4030_set_codecpdz(codec);
	}

	/* sample size */
	old_format = twl4030_read_reg_cache(codec, TWL4030_REG_AUDIO_IF);
	format = old_format;
	format &= ~TWL4030_DATA_WIDTH;
	switch (params_format(params)) {
	case SNDRV_PCM_FORMAT_S16_LE:
		format |= TWL4030_DATA_WIDTH_16S_16W;
		break;
	case SNDRV_PCM_FORMAT_S24_LE:
		format |= TWL4030_DATA_WIDTH_32S_24W;
		break;
	default:
		printk(KERN_ERR "TWL4030 hw params: unknown format %d\n",
			params_format(params));
		return -EINVAL;
	}

	if (format != old_format) {

		/* clear CODECPDZ before changing format (codec requirement) */
		twl4030_clear_codecpdz(codec);

		/* change format */
		twl4030_write(codec, TWL4030_REG_AUDIO_IF, format);

		/* set CODECPDZ afterwards */
		twl4030_set_codecpdz(codec);
	}
	return 0;
}

static int twl4030_set_dai_sysclk(struct snd_soc_dai *codec_dai,
		int clk_id, unsigned int freq, int dir)
{
	struct snd_soc_codec *codec = codec_dai->codec;
	u8 infreq;

	switch (freq) {
	case 19200000:
		infreq = TWL4030_APLL_INFREQ_19200KHZ;
		break;
	case 26000000:
		infreq = TWL4030_APLL_INFREQ_26000KHZ;
		break;
	case 38400000:
		infreq = TWL4030_APLL_INFREQ_38400KHZ;
		break;
	default:
		printk(KERN_ERR "TWL4030 set sysclk: unknown rate %d\n",
			freq);
		return -EINVAL;
	}

	infreq |= TWL4030_APLL_EN;
	twl4030_write(codec, TWL4030_REG_APLL_CTL, infreq);

	return 0;
}

static int twl4030_set_dai_fmt(struct snd_soc_dai *codec_dai,
			     unsigned int fmt)
{
	struct snd_soc_codec *codec = codec_dai->codec;
	u8 old_format, format;

	/* get format */
	old_format = twl4030_read_reg_cache(codec, TWL4030_REG_AUDIO_IF);
	format = old_format;

	/* set master/slave audio interface */
	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
	case SND_SOC_DAIFMT_CBM_CFM:
		format &= ~(TWL4030_AIF_SLAVE_EN);
		format &= ~(TWL4030_CLK256FS_EN);
		break;
	case SND_SOC_DAIFMT_CBS_CFS:
		format |= TWL4030_AIF_SLAVE_EN;
		format |= TWL4030_CLK256FS_EN;
		break;
	default:
		return -EINVAL;
	}

	/* interface format */
	format &= ~TWL4030_AIF_FORMAT;
	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	case SND_SOC_DAIFMT_I2S:
		format |= TWL4030_AIF_FORMAT_CODEC;
		break;
	default:
		return -EINVAL;
	}

	if (format != old_format) {

		/* clear CODECPDZ before changing format (codec requirement) */
		twl4030_clear_codecpdz(codec);

		/* change format */
		twl4030_write(codec, TWL4030_REG_AUDIO_IF, format);

		/* set CODECPDZ afterwards */
		twl4030_set_codecpdz(codec);
	}

	return 0;
}

#define TWL4030_RATES	 (SNDRV_PCM_RATE_8000_48000)
#define TWL4030_FORMATS	 (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FORMAT_S24_LE)

struct snd_soc_dai twl4030_dai = {
	.name = "twl4030",
	.playback = {
		.stream_name = "Playback",
		.channels_min = 2,
		.channels_max = 2,
		.rates = TWL4030_RATES,
		.formats = TWL4030_FORMATS,},
	.capture = {
		.stream_name = "Capture",
		.channels_min = 2,
		.channels_max = 2,
		.rates = TWL4030_RATES,
		.formats = TWL4030_FORMATS,},
	.ops = {
		.hw_params = twl4030_hw_params,
		.set_sysclk = twl4030_set_dai_sysclk,
		.set_fmt = twl4030_set_dai_fmt,
	}
};
EXPORT_SYMBOL_GPL(twl4030_dai);

static int twl4030_suspend(struct platform_device *pdev, pm_message_t state)
{
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	struct snd_soc_codec *codec = socdev->codec;

	twl4030_set_bias_level(codec, SND_SOC_BIAS_OFF);

	return 0;
}

static int twl4030_resume(struct platform_device *pdev)
{
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	struct snd_soc_codec *codec = socdev->codec;

	twl4030_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
	twl4030_set_bias_level(codec, codec->suspend_bias_level);
	return 0;
}

/*
 * initialize the driver
 * register the mixer and dsp interfaces with the kernel
 */

static int twl4030_init(struct snd_soc_device *socdev)
{
	struct snd_soc_codec *codec = socdev->codec;
	int ret = 0;

	printk(KERN_INFO "TWL4030 Audio Codec init \n");

	codec->name = "twl4030";
	codec->owner = THIS_MODULE;
	codec->read = twl4030_read_reg_cache;
	codec->write = twl4030_write;
	codec->set_bias_level = twl4030_set_bias_level;
	codec->dai = &twl4030_dai;
	codec->num_dai = 1;
	codec->reg_cache_size = sizeof(twl4030_reg);
	codec->reg_cache = kmemdup(twl4030_reg, sizeof(twl4030_reg),
					GFP_KERNEL);
	if (codec->reg_cache == NULL)
		return -ENOMEM;

	/* register pcms */
	ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
	if (ret < 0) {
		printk(KERN_ERR "twl4030: failed to create pcms\n");
		goto pcm_err;
	}

	twl4030_init_chip(codec);

	/* power on device */
	twl4030_set_bias_level(codec, SND_SOC_BIAS_STANDBY);

	twl4030_add_controls(codec);
	twl4030_add_widgets(codec);

	ret = snd_soc_init_card(socdev);
	if (ret < 0) {
		printk(KERN_ERR "twl4030: failed to register card\n");
		goto card_err;
	}

	return ret;

card_err:
	snd_soc_free_pcms(socdev);
	snd_soc_dapm_free(socdev);
pcm_err:
	kfree(codec->reg_cache);
	return ret;
}

static struct snd_soc_device *twl4030_socdev;

static int twl4030_probe(struct platform_device *pdev)
{
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	struct snd_soc_codec *codec;

	codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
	if (codec == NULL)
		return -ENOMEM;

	socdev->codec = codec;
	mutex_init(&codec->mutex);
	INIT_LIST_HEAD(&codec->dapm_widgets);
	INIT_LIST_HEAD(&codec->dapm_paths);

	twl4030_socdev = socdev;
	twl4030_init(socdev);

	return 0;
}

static int twl4030_remove(struct platform_device *pdev)
{
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	struct snd_soc_codec *codec = socdev->codec;

	printk(KERN_INFO "TWL4030 Audio Codec remove\n");
	kfree(codec);

	return 0;
}

struct snd_soc_codec_device soc_codec_dev_twl4030 = {
	.probe = twl4030_probe,
	.remove = twl4030_remove,
	.suspend = twl4030_suspend,
	.resume = twl4030_resume,
};
EXPORT_SYMBOL_GPL(soc_codec_dev_twl4030);

static int __init twl4030_modinit(void)
{
	return snd_soc_register_dai(&twl4030_dai);
}
module_init(twl4030_modinit);

static void __exit twl4030_exit(void)
{
	snd_soc_unregister_dai(&twl4030_dai);
}
module_exit(twl4030_exit);

MODULE_DESCRIPTION("ASoC TWL4030 codec driver");
MODULE_AUTHOR("Steve Sakoman");
MODULE_LICENSE("GPL");