summaryrefslogtreecommitdiffstats
path: root/sound/soc/qcom/qdsp6/q6asm.c
blob: e8141a33a55e58ce76a4ebf7c118c8963bd43b89 (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
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2011-2017, The Linux Foundation. All rights reserved.
// Copyright (c) 2018, Linaro Limited

#include <linux/mutex.h>
#include <linux/wait.h>
#include <linux/module.h>
#include <linux/soc/qcom/apr.h>
#include <linux/device.h>
#include <linux/of_platform.h>
#include <linux/spinlock.h>
#include <linux/kref.h>
#include <linux/of.h>
#include <uapi/sound/asound.h>
#include <uapi/sound/compress_params.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/mm.h>
#include "q6asm.h"
#include "q6core.h"
#include "q6dsp-errno.h"
#include "q6dsp-common.h"

#define ASM_STREAM_CMD_CLOSE			0x00010BCD
#define ASM_STREAM_CMD_FLUSH			0x00010BCE
#define ASM_SESSION_CMD_PAUSE			0x00010BD3
#define ASM_DATA_CMD_EOS			0x00010BDB
#define ASM_NULL_POPP_TOPOLOGY			0x00010C68
#define ASM_STREAM_CMD_FLUSH_READBUFS		0x00010C09
#define ASM_STREAM_CMD_SET_ENCDEC_PARAM		0x00010C10
#define ASM_STREAM_POSTPROC_TOPO_ID_NONE	0x00010C68
#define ASM_CMD_SHARED_MEM_MAP_REGIONS		0x00010D92
#define ASM_CMDRSP_SHARED_MEM_MAP_REGIONS	0x00010D93
#define ASM_CMD_SHARED_MEM_UNMAP_REGIONS	0x00010D94
#define ASM_DATA_CMD_MEDIA_FMT_UPDATE_V2	0x00010D98
#define ASM_DATA_EVENT_WRITE_DONE_V2		0x00010D99
#define ASM_PARAM_ID_ENCDEC_ENC_CFG_BLK_V2	0x00010DA3
#define ASM_SESSION_CMD_RUN_V2			0x00010DAA
#define ASM_MEDIA_FMT_MULTI_CHANNEL_PCM_V2	0x00010DA5
#define ASM_MEDIA_FMT_MP3			0x00010BE9
#define ASM_DATA_CMD_WRITE_V2			0x00010DAB
#define ASM_DATA_CMD_READ_V2			0x00010DAC
#define ASM_SESSION_CMD_SUSPEND			0x00010DEC
#define ASM_STREAM_CMD_OPEN_WRITE_V3		0x00010DB3
#define ASM_STREAM_CMD_OPEN_READ_V3                 0x00010DB4
#define ASM_DATA_EVENT_READ_DONE_V2 0x00010D9A
#define ASM_STREAM_CMD_OPEN_READWRITE_V2        0x00010D8D


#define ASM_LEGACY_STREAM_SESSION	0
/* Bit shift for the stream_perf_mode subfield. */
#define ASM_SHIFT_STREAM_PERF_MODE_FLAG_IN_OPEN_READ              29
#define ASM_END_POINT_DEVICE_MATRIX	0
#define ASM_DEFAULT_APP_TYPE		0
#define ASM_SYNC_IO_MODE		0x0001
#define ASM_ASYNC_IO_MODE		0x0002
#define ASM_TUN_READ_IO_MODE		0x0004	/* tunnel read write mode */
#define ASM_TUN_WRITE_IO_MODE		0x0008	/* tunnel read write mode */
#define ASM_SHIFT_GAPLESS_MODE_FLAG	31
#define ADSP_MEMORY_MAP_SHMEM8_4K_POOL	3

struct avs_cmd_shared_mem_map_regions {
	u16 mem_pool_id;
	u16 num_regions;
	u32 property_flag;
} __packed;

struct avs_shared_map_region_payload {
	u32 shm_addr_lsw;
	u32 shm_addr_msw;
	u32 mem_size_bytes;
} __packed;

struct avs_cmd_shared_mem_unmap_regions {
	u32 mem_map_handle;
} __packed;

struct asm_data_cmd_media_fmt_update_v2 {
	u32 fmt_blk_size;
} __packed;

struct asm_multi_channel_pcm_fmt_blk_v2 {
	struct asm_data_cmd_media_fmt_update_v2 fmt_blk;
	u16 num_channels;
	u16 bits_per_sample;
	u32 sample_rate;
	u16 is_signed;
	u16 reserved;
	u8 channel_mapping[PCM_MAX_NUM_CHANNEL];
} __packed;

struct asm_stream_cmd_set_encdec_param {
	u32                  param_id;
	u32                  param_size;
} __packed;

struct asm_enc_cfg_blk_param_v2 {
	u32                  frames_per_buf;
	u32                  enc_cfg_blk_size;
} __packed;

struct asm_multi_channel_pcm_enc_cfg_v2 {
	struct asm_stream_cmd_set_encdec_param  encdec;
	struct asm_enc_cfg_blk_param_v2	encblk;
	uint16_t  num_channels;
	uint16_t  bits_per_sample;
	uint32_t  sample_rate;
	uint16_t  is_signed;
	uint16_t  reserved;
	uint8_t   channel_mapping[8];
} __packed;

struct asm_data_cmd_read_v2 {
	u32                  buf_addr_lsw;
	u32                  buf_addr_msw;
	u32                  mem_map_handle;
	u32                  buf_size;
	u32                  seq_id;
} __packed;

struct asm_data_cmd_read_v2_done {
	u32	status;
	u32	buf_addr_lsw;
	u32	buf_addr_msw;
};

struct asm_stream_cmd_open_read_v3 {
	u32                    mode_flags;
	u32                    src_endpointype;
	u32                    preprocopo_id;
	u32                    enc_cfg_id;
	u16                    bits_per_sample;
	u16                    reserved;
} __packed;

struct asm_data_cmd_write_v2 {
	u32 buf_addr_lsw;
	u32 buf_addr_msw;
	u32 mem_map_handle;
	u32 buf_size;
	u32 seq_id;
	u32 timestamp_lsw;
	u32 timestamp_msw;
	u32 flags;
} __packed;

struct asm_stream_cmd_open_write_v3 {
	uint32_t mode_flags;
	uint16_t sink_endpointype;
	uint16_t bits_per_sample;
	uint32_t postprocopo_id;
	uint32_t dec_fmt_id;
} __packed;

struct asm_session_cmd_run_v2 {
	u32 flags;
	u32 time_lsw;
	u32 time_msw;
} __packed;

struct audio_buffer {
	phys_addr_t phys;
	uint32_t size;		/* size of buffer */
};

struct audio_port_data {
	struct audio_buffer *buf;
	uint32_t num_periods;
	uint32_t dsp_buf;
	uint32_t mem_map_handle;
};

struct q6asm {
	struct apr_device *adev;
	struct device *dev;
	struct q6core_svc_api_info ainfo;
	wait_queue_head_t mem_wait;
	spinlock_t slock;
	struct audio_client *session[MAX_SESSIONS + 1];
};

struct audio_client {
	int session;
	q6asm_cb cb;
	void *priv;
	uint32_t io_mode;
	struct apr_device *adev;
	struct mutex cmd_lock;
	spinlock_t lock;
	struct kref refcount;
	/* idx:1 out port, 0: in port */
	struct audio_port_data port[2];
	wait_queue_head_t cmd_wait;
	struct aprv2_ibasic_rsp_result_t result;
	int perf_mode;
	int stream_id;
	struct q6asm *q6asm;
	struct device *dev;
};

static inline void q6asm_add_hdr(struct audio_client *ac, struct apr_hdr *hdr,
				 uint32_t pkt_size, bool cmd_flg,
				 uint32_t stream_id)
{
	hdr->hdr_field = APR_SEQ_CMD_HDR_FIELD;
	hdr->src_port = ((ac->session << 8) & 0xFF00) | (stream_id);
	hdr->dest_port = ((ac->session << 8) & 0xFF00) | (stream_id);
	hdr->pkt_size = pkt_size;
	if (cmd_flg)
		hdr->token = ac->session;
}

static int q6asm_apr_send_session_pkt(struct q6asm *a, struct audio_client *ac,
				      struct apr_pkt *pkt, uint32_t rsp_opcode)
{
	struct apr_hdr *hdr = &pkt->hdr;
	int rc;

	mutex_lock(&ac->cmd_lock);
	ac->result.opcode = 0;
	ac->result.status = 0;
	rc = apr_send_pkt(a->adev, pkt);
	if (rc < 0)
		goto err;

	if (rsp_opcode)
		rc = wait_event_timeout(a->mem_wait,
					(ac->result.opcode == hdr->opcode) ||
					(ac->result.opcode == rsp_opcode),
					5 * HZ);
	else
		rc = wait_event_timeout(a->mem_wait,
					(ac->result.opcode == hdr->opcode),
					5 * HZ);

	if (!rc) {
		dev_err(a->dev, "CMD timeout\n");
		rc = -ETIMEDOUT;
	} else if (ac->result.status > 0) {
		dev_err(a->dev, "DSP returned error[%x]\n",
			ac->result.status);
		rc = -EINVAL;
	}

err:
	mutex_unlock(&ac->cmd_lock);
	return rc;
}

static int __q6asm_memory_unmap(struct audio_client *ac,
				phys_addr_t buf_add, int dir)
{
	struct avs_cmd_shared_mem_unmap_regions *mem_unmap;
	struct q6asm *a = dev_get_drvdata(ac->dev->parent);
	struct apr_pkt *pkt;
	int rc, pkt_size;
	void *p;

	if (ac->port[dir].mem_map_handle == 0) {
		dev_err(ac->dev, "invalid mem handle\n");
		return -EINVAL;
	}

	pkt_size = APR_HDR_SIZE + sizeof(*mem_unmap);
	p = kzalloc(pkt_size, GFP_KERNEL);
	if (!p)
		return -ENOMEM;

	pkt = p;
	mem_unmap = p + APR_HDR_SIZE;

	pkt->hdr.hdr_field = APR_SEQ_CMD_HDR_FIELD;
	pkt->hdr.src_port = 0;
	pkt->hdr.dest_port = 0;
	pkt->hdr.pkt_size = pkt_size;
	pkt->hdr.token = ((ac->session << 8) | dir);

	pkt->hdr.opcode = ASM_CMD_SHARED_MEM_UNMAP_REGIONS;
	mem_unmap->mem_map_handle = ac->port[dir].mem_map_handle;

	rc = q6asm_apr_send_session_pkt(a, ac, pkt, 0);
	if (rc < 0) {
		kfree(pkt);
		return rc;
	}

	ac->port[dir].mem_map_handle = 0;

	kfree(pkt);
	return 0;
}


static void q6asm_audio_client_free_buf(struct audio_client *ac,
					struct audio_port_data *port)
{
	unsigned long flags;

	spin_lock_irqsave(&ac->lock, flags);
	port->num_periods = 0;
	kfree(port->buf);
	port->buf = NULL;
	spin_unlock_irqrestore(&ac->lock, flags);
}

/**
 * q6asm_unmap_memory_regions() - unmap memory regions in the dsp.
 *
 * @dir: direction of audio stream
 * @ac: audio client instanace
 *
 * Return: Will be an negative value on failure or zero on success
 */
int q6asm_unmap_memory_regions(unsigned int dir, struct audio_client *ac)
{
	struct audio_port_data *port;
	int cnt = 0;
	int rc = 0;

	port = &ac->port[dir];
	if (!port->buf) {
		rc = -EINVAL;
		goto err;
	}

	cnt = port->num_periods - 1;
	if (cnt >= 0) {
		rc = __q6asm_memory_unmap(ac, port->buf[dir].phys, dir);
		if (rc < 0) {
			dev_err(ac->dev, "%s: Memory_unmap_regions failed %d\n",
				__func__, rc);
			goto err;
		}
	}

	q6asm_audio_client_free_buf(ac, port);

err:
	return rc;
}
EXPORT_SYMBOL_GPL(q6asm_unmap_memory_regions);

static int __q6asm_memory_map_regions(struct audio_client *ac, int dir,
				      size_t period_sz, unsigned int periods,
				      bool is_contiguous)
{
	struct avs_cmd_shared_mem_map_regions *cmd = NULL;
	struct avs_shared_map_region_payload *mregions = NULL;
	struct q6asm *a = dev_get_drvdata(ac->dev->parent);
	struct audio_port_data *port = NULL;
	struct audio_buffer *ab = NULL;
	struct apr_pkt *pkt;
	void *p;
	unsigned long flags;
	uint32_t num_regions, buf_sz;
	int rc, i, pkt_size;

	if (is_contiguous) {
		num_regions = 1;
		buf_sz = period_sz * periods;
	} else {
		buf_sz = period_sz;
		num_regions = periods;
	}

	/* DSP expects size should be aligned to 4K */
	buf_sz = ALIGN(buf_sz, 4096);

	pkt_size = APR_HDR_SIZE + sizeof(*cmd) +
		   (sizeof(*mregions) * num_regions);

	p = kzalloc(pkt_size, GFP_KERNEL);
	if (!p)
		return -ENOMEM;

	pkt = p;
	cmd = p + APR_HDR_SIZE;
	mregions = p + APR_HDR_SIZE +  sizeof(*cmd);

	pkt->hdr.hdr_field = APR_SEQ_CMD_HDR_FIELD;
	pkt->hdr.src_port = 0;
	pkt->hdr.dest_port = 0;
	pkt->hdr.pkt_size = pkt_size;
	pkt->hdr.token = ((ac->session << 8) | dir);
	pkt->hdr.opcode = ASM_CMD_SHARED_MEM_MAP_REGIONS;

	cmd->mem_pool_id = ADSP_MEMORY_MAP_SHMEM8_4K_POOL;
	cmd->num_regions = num_regions;
	cmd->property_flag = 0x00;

	spin_lock_irqsave(&ac->lock, flags);
	port = &ac->port[dir];

	for (i = 0; i < num_regions; i++) {
		ab = &port->buf[i];
		mregions->shm_addr_lsw = lower_32_bits(ab->phys);
		mregions->shm_addr_msw = upper_32_bits(ab->phys);
		mregions->mem_size_bytes = buf_sz;
		++mregions;
	}
	spin_unlock_irqrestore(&ac->lock, flags);

	rc = q6asm_apr_send_session_pkt(a, ac, pkt,
					ASM_CMDRSP_SHARED_MEM_MAP_REGIONS);

	kfree(pkt);

	return rc;
}

/**
 * q6asm_map_memory_regions() - map memory regions in the dsp.
 *
 * @dir: direction of audio stream
 * @ac: audio client instanace
 * @phys: physcial address that needs mapping.
 * @period_sz: audio period size
 * @periods: number of periods
 *
 * Return: Will be an negative value on failure or zero on success
 */
int q6asm_map_memory_regions(unsigned int dir, struct audio_client *ac,
			     phys_addr_t phys,
			     size_t period_sz, unsigned int periods)
{
	struct audio_buffer *buf;
	unsigned long flags;
	int cnt;
	int rc;

	spin_lock_irqsave(&ac->lock, flags);
	if (ac->port[dir].buf) {
		dev_err(ac->dev, "Buffer already allocated\n");
		spin_unlock_irqrestore(&ac->lock, flags);
		return 0;
	}

	buf = kzalloc(((sizeof(struct audio_buffer)) * periods), GFP_ATOMIC);
	if (!buf) {
		spin_unlock_irqrestore(&ac->lock, flags);
		return -ENOMEM;
	}


	ac->port[dir].buf = buf;

	buf[0].phys = phys;
	buf[0].size = period_sz;

	for (cnt = 1; cnt < periods; cnt++) {
		if (period_sz > 0) {
			buf[cnt].phys = buf[0].phys + (cnt * period_sz);
			buf[cnt].size = period_sz;
		}
	}
	ac->port[dir].num_periods = periods;

	spin_unlock_irqrestore(&ac->lock, flags);

	rc = __q6asm_memory_map_regions(ac, dir, period_sz, periods, 1);
	if (rc < 0) {
		dev_err(ac->dev, "Memory_map_regions failed\n");
		q6asm_audio_client_free_buf(ac, &ac->port[dir]);
	}

	return rc;
}
EXPORT_SYMBOL_GPL(q6asm_map_memory_regions);

static void q6asm_audio_client_release(struct kref *ref)
{
	struct audio_client *ac;
	struct q6asm *a;
	unsigned long flags;

	ac = container_of(ref, struct audio_client, refcount);
	a = ac->q6asm;

	spin_lock_irqsave(&a->slock, flags);
	a->session[ac->session] = NULL;
	spin_unlock_irqrestore(&a->slock, flags);

	kfree(ac);
}

/**
 * q6asm_audio_client_free() - Freee allocated audio client
 *
 * @ac: audio client to free
 */
void q6asm_audio_client_free(struct audio_client *ac)
{
	kref_put(&ac->refcount, q6asm_audio_client_release);
}
EXPORT_SYMBOL_GPL(q6asm_audio_client_free);

static struct audio_client *q6asm_get_audio_client(struct q6asm *a,
						   int session_id)
{
	struct audio_client *ac = NULL;
	unsigned long flags;

	spin_lock_irqsave(&a->slock, flags);
	if ((session_id <= 0) || (session_id > MAX_SESSIONS)) {
		dev_err(a->dev, "invalid session: %d\n", session_id);
		goto err;
	}

	/* check for valid session */
	if (!a->session[session_id])
		goto err;
	else if (a->session[session_id]->session != session_id)
		goto err;

	ac = a->session[session_id];
	kref_get(&ac->refcount);
err:
	spin_unlock_irqrestore(&a->slock, flags);
	return ac;
}

static int32_t q6asm_stream_callback(struct apr_device *adev,
				     struct apr_resp_pkt *data,
				     int session_id)
{
	struct q6asm *q6asm = dev_get_drvdata(&adev->dev);
	struct aprv2_ibasic_rsp_result_t *result;
	struct apr_hdr *hdr = &data->hdr;
	struct audio_port_data *port;
	struct audio_client *ac;
	uint32_t client_event = 0;
	int ret = 0;

	ac = q6asm_get_audio_client(q6asm, session_id);
	if (!ac)/* Audio client might already be freed by now */
		return 0;

	result = data->payload;

	switch (hdr->opcode) {
	case APR_BASIC_RSP_RESULT:
		switch (result->opcode) {
		case ASM_SESSION_CMD_PAUSE:
			client_event = ASM_CLIENT_EVENT_CMD_PAUSE_DONE;
			break;
		case ASM_SESSION_CMD_SUSPEND:
			client_event = ASM_CLIENT_EVENT_CMD_SUSPEND_DONE;
			break;
		case ASM_DATA_CMD_EOS:
			client_event = ASM_CLIENT_EVENT_CMD_EOS_DONE;
			break;
		case ASM_STREAM_CMD_FLUSH:
			client_event = ASM_CLIENT_EVENT_CMD_FLUSH_DONE;
			break;
		case ASM_SESSION_CMD_RUN_V2:
			client_event = ASM_CLIENT_EVENT_CMD_RUN_DONE;
			break;
		case ASM_STREAM_CMD_CLOSE:
			client_event = ASM_CLIENT_EVENT_CMD_CLOSE_DONE;
			break;
		case ASM_STREAM_CMD_FLUSH_READBUFS:
			client_event = ASM_CLIENT_EVENT_CMD_OUT_FLUSH_DONE;
			break;
		case ASM_STREAM_CMD_OPEN_WRITE_V3:
		case ASM_STREAM_CMD_OPEN_READ_V3:
		case ASM_STREAM_CMD_OPEN_READWRITE_V2:
		case ASM_STREAM_CMD_SET_ENCDEC_PARAM:
		case ASM_DATA_CMD_MEDIA_FMT_UPDATE_V2:
			if (result->status != 0) {
				dev_err(ac->dev,
					"cmd = 0x%x returned error = 0x%x\n",
					result->opcode, result->status);
				ac->result = *result;
				wake_up(&ac->cmd_wait);
				ret = 0;
				goto done;
			}
			break;
		default:
			dev_err(ac->dev, "command[0x%x] not expecting rsp\n",
				result->opcode);
			break;
		}

		ac->result = *result;
		wake_up(&ac->cmd_wait);

		if (ac->cb)
			ac->cb(client_event, hdr->token,
			       data->payload, ac->priv);

		ret = 0;
		goto done;

	case ASM_DATA_EVENT_WRITE_DONE_V2:
		client_event = ASM_CLIENT_EVENT_DATA_WRITE_DONE;
		if (ac->io_mode & ASM_SYNC_IO_MODE) {
			phys_addr_t phys;
			unsigned long flags;

			spin_lock_irqsave(&ac->lock, flags);

			port =  &ac->port[SNDRV_PCM_STREAM_PLAYBACK];

			if (!port->buf) {
				spin_unlock_irqrestore(&ac->lock, flags);
				ret = 0;
				goto done;
			}

			phys = port->buf[hdr->token].phys;

			if (lower_32_bits(phys) != result->opcode ||
			    upper_32_bits(phys) != result->status) {
				dev_err(ac->dev, "Expected addr %pa\n",
					&port->buf[hdr->token].phys);
				spin_unlock_irqrestore(&ac->lock, flags);
				ret = -EINVAL;
				goto done;
			}
			spin_unlock_irqrestore(&ac->lock, flags);
		}
		break;
	case ASM_DATA_EVENT_READ_DONE_V2:
		client_event = ASM_CLIENT_EVENT_DATA_READ_DONE;
		if (ac->io_mode & ASM_SYNC_IO_MODE) {
			struct asm_data_cmd_read_v2_done *done = data->payload;
			unsigned long flags;
			phys_addr_t phys;

			spin_lock_irqsave(&ac->lock, flags);
			port =  &ac->port[SNDRV_PCM_STREAM_CAPTURE];
			if (!port->buf) {
				spin_unlock_irqrestore(&ac->lock, flags);
				ret = 0;
				goto done;
			}

			phys = port->buf[hdr->token].phys;

			if (upper_32_bits(phys) != done->buf_addr_msw ||
			    lower_32_bits(phys) != done->buf_addr_lsw) {
				dev_err(ac->dev, "Expected addr %pa %08x-%08x\n",
					&port->buf[hdr->token].phys,
					done->buf_addr_lsw,
					done->buf_addr_msw);
				spin_unlock_irqrestore(&ac->lock, flags);
				ret = -EINVAL;
				goto done;
			}
			spin_unlock_irqrestore(&ac->lock, flags);
		}

		break;
	}

	if (ac->cb)
		ac->cb(client_event, hdr->token, data->payload, ac->priv);

done:
	kref_put(&ac->refcount, q6asm_audio_client_release);
	return ret;
}

static int q6asm_srvc_callback(struct apr_device *adev,
			       struct apr_resp_pkt *data)
{
	struct q6asm *q6asm = dev_get_drvdata(&adev->dev);
	struct aprv2_ibasic_rsp_result_t *result;
	struct audio_port_data *port;
	struct audio_client *ac = NULL;
	struct apr_hdr *hdr = &data->hdr;
	struct q6asm *a;
	uint32_t sid = 0;
	uint32_t dir = 0;
	int session_id;

	session_id = (hdr->dest_port >> 8) & 0xFF;
	if (session_id)
		return q6asm_stream_callback(adev, data, session_id);

	sid = (hdr->token >> 8) & 0x0F;
	ac = q6asm_get_audio_client(q6asm, sid);
	if (!ac) {
		dev_err(&adev->dev, "Audio Client not active\n");
		return 0;
	}

	a = dev_get_drvdata(ac->dev->parent);
	dir = (hdr->token & 0x0F);
	port = &ac->port[dir];
	result = data->payload;

	switch (hdr->opcode) {
	case APR_BASIC_RSP_RESULT:
		switch (result->opcode) {
		case ASM_CMD_SHARED_MEM_MAP_REGIONS:
		case ASM_CMD_SHARED_MEM_UNMAP_REGIONS:
			ac->result = *result;
			wake_up(&a->mem_wait);
			break;
		default:
			dev_err(&adev->dev, "command[0x%x] not expecting rsp\n",
				 result->opcode);
			break;
		}
		goto done;
	case ASM_CMDRSP_SHARED_MEM_MAP_REGIONS:
		ac->result.status = 0;
		ac->result.opcode = hdr->opcode;
		port->mem_map_handle = result->opcode;
		wake_up(&a->mem_wait);
		break;
	case ASM_CMD_SHARED_MEM_UNMAP_REGIONS:
		ac->result.opcode = hdr->opcode;
		ac->result.status = 0;
		port->mem_map_handle = 0;
		wake_up(&a->mem_wait);
		break;
	default:
		dev_dbg(&adev->dev, "command[0x%x]success [0x%x]\n",
			result->opcode, result->status);
		break;
	}

	if (ac->cb)
		ac->cb(hdr->opcode, hdr->token, data->payload, ac->priv);

done:
	kref_put(&ac->refcount, q6asm_audio_client_release);

	return 0;
}

/**
 * q6asm_get_session_id() - get session id for audio client
 *
 * @c: audio client pointer
 *
 * Return: Will be an session id of the audio client.
 */
int q6asm_get_session_id(struct audio_client *c)
{
	return c->session;
}
EXPORT_SYMBOL_GPL(q6asm_get_session_id);

/**
 * q6asm_audio_client_alloc() - Allocate a new audio client
 *
 * @dev: Pointer to asm child device.
 * @cb: event callback.
 * @priv: private data associated with this client.
 * @stream_id: stream id
 * @perf_mode: performace mode for this client
 *
 * Return: Will be an error pointer on error or a valid audio client
 * on success.
 */
struct audio_client *q6asm_audio_client_alloc(struct device *dev, q6asm_cb cb,
					      void *priv, int stream_id,
					      int perf_mode)
{
	struct q6asm *a = dev_get_drvdata(dev->parent);
	struct audio_client *ac;
	unsigned long flags;

	ac = q6asm_get_audio_client(a, stream_id + 1);
	if (ac) {
		dev_err(dev, "Audio Client already active\n");
		return ac;
	}

	ac = kzalloc(sizeof(*ac), GFP_KERNEL);
	if (!ac)
		return ERR_PTR(-ENOMEM);

	spin_lock_irqsave(&a->slock, flags);
	a->session[stream_id + 1] = ac;
	spin_unlock_irqrestore(&a->slock, flags);
	ac->session = stream_id + 1;
	ac->cb = cb;
	ac->dev = dev;
	ac->q6asm = a;
	ac->priv = priv;
	ac->io_mode = ASM_SYNC_IO_MODE;
	ac->perf_mode = perf_mode;
	/* DSP expects stream id from 1 */
	ac->stream_id = 1;
	ac->adev = a->adev;
	kref_init(&ac->refcount);

	init_waitqueue_head(&ac->cmd_wait);
	mutex_init(&ac->cmd_lock);
	spin_lock_init(&ac->lock);

	return ac;
}
EXPORT_SYMBOL_GPL(q6asm_audio_client_alloc);

static int q6asm_ac_send_cmd_sync(struct audio_client *ac, struct apr_pkt *pkt)
{
	struct apr_hdr *hdr = &pkt->hdr;
	int rc;

	mutex_lock(&ac->cmd_lock);
	ac->result.opcode = 0;
	ac->result.status = 0;

	rc = apr_send_pkt(ac->adev, pkt);
	if (rc < 0)
		goto err;

	rc = wait_event_timeout(ac->cmd_wait,
				(ac->result.opcode == hdr->opcode), 5 * HZ);
	if (!rc) {
		dev_err(ac->dev, "CMD timeout\n");
		rc =  -ETIMEDOUT;
		goto err;
	}

	if (ac->result.status > 0) {
		dev_err(ac->dev, "DSP returned error[%x]\n",
			ac->result.status);
		rc = -EINVAL;
	} else {
		rc = 0;
	}


err:
	mutex_unlock(&ac->cmd_lock);
	return rc;
}

/**
 * q6asm_open_write() - Open audio client for writing
 *
 * @ac: audio client pointer
 * @format: audio sample format
 * @bits_per_sample: bits per sample
 *
 * Return: Will be an negative value on error or zero on success
 */
int q6asm_open_write(struct audio_client *ac, uint32_t format,
		     uint16_t bits_per_sample)
{
	struct asm_stream_cmd_open_write_v3 *open;
	struct apr_pkt *pkt;
	void *p;
	int rc, pkt_size;

	pkt_size = APR_HDR_SIZE + sizeof(*open);

	p = kzalloc(pkt_size, GFP_KERNEL);
	if (!p)
		return -ENOMEM;

	pkt = p;
	open = p + APR_HDR_SIZE;
	q6asm_add_hdr(ac, &pkt->hdr, pkt_size, true, ac->stream_id);

	pkt->hdr.opcode = ASM_STREAM_CMD_OPEN_WRITE_V3;
	open->mode_flags = 0x00;
	open->mode_flags |= ASM_LEGACY_STREAM_SESSION;

	/* source endpoint : matrix */
	open->sink_endpointype = ASM_END_POINT_DEVICE_MATRIX;
	open->bits_per_sample = bits_per_sample;
	open->postprocopo_id = ASM_NULL_POPP_TOPOLOGY;

	switch (format) {
	case SND_AUDIOCODEC_MP3:
		open->dec_fmt_id = ASM_MEDIA_FMT_MP3;
		break;
	case FORMAT_LINEAR_PCM:
		open->dec_fmt_id = ASM_MEDIA_FMT_MULTI_CHANNEL_PCM_V2;
		break;
	default:
		dev_err(ac->dev, "Invalid format 0x%x\n", format);
		rc = -EINVAL;
		goto err;
	}

	rc = q6asm_ac_send_cmd_sync(ac, pkt);
	if (rc < 0)
		goto err;

	ac->io_mode |= ASM_TUN_WRITE_IO_MODE;

err:
	kfree(pkt);
	return rc;
}
EXPORT_SYMBOL_GPL(q6asm_open_write);

static int __q6asm_run(struct audio_client *ac, uint32_t flags,
	      uint32_t msw_ts, uint32_t lsw_ts, bool wait)
{
	struct asm_session_cmd_run_v2 *run;
	struct apr_pkt *pkt;
	int pkt_size, rc;
	void *p;

	pkt_size = APR_HDR_SIZE + sizeof(*run);
	p = kzalloc(pkt_size, GFP_ATOMIC);
	if (!p)
		return -ENOMEM;

	pkt = p;
	run = p + APR_HDR_SIZE;

	q6asm_add_hdr(ac, &pkt->hdr, pkt_size, true, ac->stream_id);

	pkt->hdr.opcode = ASM_SESSION_CMD_RUN_V2;
	run->flags = flags;
	run->time_lsw = lsw_ts;
	run->time_msw = msw_ts;
	if (wait) {
		rc = q6asm_ac_send_cmd_sync(ac, pkt);
	} else {
		rc = apr_send_pkt(ac->adev, pkt);
		if (rc == pkt_size)
			rc = 0;
	}

	kfree(pkt);
	return rc;
}

/**
 * q6asm_run() - start the audio client
 *
 * @ac: audio client pointer
 * @flags: flags associated with write
 * @msw_ts: timestamp msw
 * @lsw_ts: timestamp lsw
 *
 * Return: Will be an negative value on error or zero on success
 */
int q6asm_run(struct audio_client *ac, uint32_t flags,
	      uint32_t msw_ts, uint32_t lsw_ts)
{
	return __q6asm_run(ac, flags, msw_ts, lsw_ts, true);
}
EXPORT_SYMBOL_GPL(q6asm_run);

/**
 * q6asm_run_nowait() - start the audio client withou blocking
 *
 * @ac: audio client pointer
 * @flags: flags associated with write
 * @msw_ts: timestamp msw
 * @lsw_ts: timestamp lsw
 *
 * Return: Will be an negative value on error or zero on success
 */
int q6asm_run_nowait(struct audio_client *ac, uint32_t flags,
	      uint32_t msw_ts, uint32_t lsw_ts)
{
	return __q6asm_run(ac, flags, msw_ts, lsw_ts, false);
}
EXPORT_SYMBOL_GPL(q6asm_run_nowait);

/**
 * q6asm_media_format_block_multi_ch_pcm() - setup pcm configuration
 *
 * @ac: audio client pointer
 * @rate: audio sample rate
 * @channels: number of audio channels.
 * @channel_map: channel map pointer
 * @bits_per_sample: bits per sample
 *
 * Return: Will be an negative value on error or zero on success
 */
int q6asm_media_format_block_multi_ch_pcm(struct audio_client *ac,
					  uint32_t rate, uint32_t channels,
					  u8 channel_map[PCM_MAX_NUM_CHANNEL],
					  uint16_t bits_per_sample)
{
	struct asm_multi_channel_pcm_fmt_blk_v2 *fmt;
	struct apr_pkt *pkt;
	u8 *channel_mapping;
	void *p;
	int rc, pkt_size;

	pkt_size = APR_HDR_SIZE + sizeof(*fmt);
	p = kzalloc(pkt_size, GFP_KERNEL);
	if (!p)
		return -ENOMEM;

	pkt = p;
	fmt = p + APR_HDR_SIZE;

	q6asm_add_hdr(ac, &pkt->hdr, pkt_size, true, ac->stream_id);

	pkt->hdr.opcode = ASM_DATA_CMD_MEDIA_FMT_UPDATE_V2;
	fmt->fmt_blk.fmt_blk_size = sizeof(*fmt) - sizeof(fmt->fmt_blk);
	fmt->num_channels = channels;
	fmt->bits_per_sample = bits_per_sample;
	fmt->sample_rate = rate;
	fmt->is_signed = 1;

	channel_mapping = fmt->channel_mapping;

	if (channel_map) {
		memcpy(channel_mapping, channel_map, PCM_MAX_NUM_CHANNEL);
	} else {
		if (q6dsp_map_channels(channel_mapping, channels)) {
			dev_err(ac->dev, " map channels failed %d\n", channels);
			rc = -EINVAL;
			goto err;
		}
	}

	rc = q6asm_ac_send_cmd_sync(ac, pkt);

err:
	kfree(pkt);
	return rc;
}
EXPORT_SYMBOL_GPL(q6asm_media_format_block_multi_ch_pcm);

/**
 * q6asm_enc_cfg_blk_pcm_format_support() - setup pcm configuration for capture
 *
 * @ac: audio client pointer
 * @rate: audio sample rate
 * @channels: number of audio channels.
 * @bits_per_sample: bits per sample
 *
 * Return: Will be an negative value on error or zero on success
 */
int q6asm_enc_cfg_blk_pcm_format_support(struct audio_client *ac,
		uint32_t rate, uint32_t channels, uint16_t bits_per_sample)
{
	struct asm_multi_channel_pcm_enc_cfg_v2  *enc_cfg;
	struct apr_pkt *pkt;
	u8 *channel_mapping;
	u32 frames_per_buf = 0;
	int pkt_size, rc;
	void *p;

	pkt_size = APR_HDR_SIZE + sizeof(*enc_cfg);
	p = kzalloc(pkt_size, GFP_KERNEL);
	if (!p)
		return -ENOMEM;

	pkt = p;
	enc_cfg = p + APR_HDR_SIZE;
	q6asm_add_hdr(ac, &pkt->hdr, pkt_size, true, ac->stream_id);

	pkt->hdr.opcode = ASM_STREAM_CMD_SET_ENCDEC_PARAM;
	enc_cfg->encdec.param_id = ASM_PARAM_ID_ENCDEC_ENC_CFG_BLK_V2;
	enc_cfg->encdec.param_size = sizeof(*enc_cfg) - sizeof(enc_cfg->encdec);
	enc_cfg->encblk.frames_per_buf = frames_per_buf;
	enc_cfg->encblk.enc_cfg_blk_size  = enc_cfg->encdec.param_size -
					sizeof(struct asm_enc_cfg_blk_param_v2);

	enc_cfg->num_channels = channels;
	enc_cfg->bits_per_sample = bits_per_sample;
	enc_cfg->sample_rate = rate;
	enc_cfg->is_signed = 1;
	channel_mapping = enc_cfg->channel_mapping;

	if (q6dsp_map_channels(channel_mapping, channels)) {
		rc = -EINVAL;
		goto err;
	}

	rc = q6asm_ac_send_cmd_sync(ac, pkt);
err:
	kfree(pkt);
	return rc;
}
EXPORT_SYMBOL_GPL(q6asm_enc_cfg_blk_pcm_format_support);

/**
 * q6asm_read() - read data of period size from audio client
 *
 * @ac: audio client pointer
 *
 * Return: Will be an negative value on error or zero on success
 */
int q6asm_read(struct audio_client *ac)
{
	struct asm_data_cmd_read_v2 *read;
	struct audio_port_data *port;
	struct audio_buffer *ab;
	struct apr_pkt *pkt;
	unsigned long flags;
	int pkt_size;
	int rc = 0;
	void *p;

	pkt_size = APR_HDR_SIZE + sizeof(*read);
	p = kzalloc(pkt_size, GFP_ATOMIC);
	if (!p)
		return -ENOMEM;

	pkt = p;
	read = p + APR_HDR_SIZE;

	spin_lock_irqsave(&ac->lock, flags);
	port = &ac->port[SNDRV_PCM_STREAM_CAPTURE];
	q6asm_add_hdr(ac, &pkt->hdr, pkt_size, false, ac->stream_id);
	ab = &port->buf[port->dsp_buf];
	pkt->hdr.opcode = ASM_DATA_CMD_READ_V2;
	read->buf_addr_lsw = lower_32_bits(ab->phys);
	read->buf_addr_msw = upper_32_bits(ab->phys);
	read->mem_map_handle = port->mem_map_handle;

	read->buf_size = ab->size;
	read->seq_id = port->dsp_buf;
	pkt->hdr.token = port->dsp_buf;

	port->dsp_buf++;

	if (port->dsp_buf >= port->num_periods)
		port->dsp_buf = 0;

	spin_unlock_irqrestore(&ac->lock, flags);
	rc = apr_send_pkt(ac->adev, pkt);
	if (rc == pkt_size)
		rc = 0;
	else
		pr_err("read op[0x%x]rc[%d]\n", pkt->hdr.opcode, rc);

	kfree(pkt);
	return rc;
}
EXPORT_SYMBOL_GPL(q6asm_read);

static int __q6asm_open_read(struct audio_client *ac,
		uint32_t format, uint16_t bits_per_sample)
{
	struct asm_stream_cmd_open_read_v3 *open;
	struct apr_pkt *pkt;
	int pkt_size, rc;
	void *p;

	pkt_size = APR_HDR_SIZE + sizeof(*open);
	p = kzalloc(pkt_size, GFP_KERNEL);
	if (!p)
		return -ENOMEM;

	pkt = p;
	open = p + APR_HDR_SIZE;

	q6asm_add_hdr(ac, &pkt->hdr,  pkt_size, true, ac->stream_id);
	pkt->hdr.opcode = ASM_STREAM_CMD_OPEN_READ_V3;
	/* Stream prio : High, provide meta info with encoded frames */
	open->src_endpointype = ASM_END_POINT_DEVICE_MATRIX;

	open->preprocopo_id = ASM_STREAM_POSTPROC_TOPO_ID_NONE;
	open->bits_per_sample = bits_per_sample;
	open->mode_flags = 0x0;

	open->mode_flags |= ASM_LEGACY_STREAM_SESSION <<
				ASM_SHIFT_STREAM_PERF_MODE_FLAG_IN_OPEN_READ;

	switch (format) {
	case FORMAT_LINEAR_PCM:
		open->mode_flags |= 0x00;
		open->enc_cfg_id = ASM_MEDIA_FMT_MULTI_CHANNEL_PCM_V2;
		break;
	default:
		pr_err("Invalid format[%d]\n", format);
	}

	rc = q6asm_ac_send_cmd_sync(ac, pkt);

	kfree(pkt);
	return rc;
}

/**
 * q6asm_open_read() - Open audio client for reading
 *
 * @ac: audio client pointer
 * @format: audio sample format
 * @bits_per_sample: bits per sample
 *
 * Return: Will be an negative value on error or zero on success
 */
int q6asm_open_read(struct audio_client *ac, uint32_t format,
			uint16_t bits_per_sample)
{
	return __q6asm_open_read(ac, format, bits_per_sample);
}
EXPORT_SYMBOL_GPL(q6asm_open_read);

/**
 * q6asm_write_async() - non blocking write
 *
 * @ac: audio client pointer
 * @len: length in bytes
 * @msw_ts: timestamp msw
 * @lsw_ts: timestamp lsw
 * @wflags: flags associated with write
 *
 * Return: Will be an negative value on error or zero on success
 */
int q6asm_write_async(struct audio_client *ac, uint32_t len, uint32_t msw_ts,
		       uint32_t lsw_ts, uint32_t wflags)
{
	struct asm_data_cmd_write_v2 *write;
	struct audio_port_data *port;
	struct audio_buffer *ab;
	unsigned long flags;
	struct apr_pkt *pkt;
	int pkt_size;
	int rc = 0;
	void *p;

	pkt_size = APR_HDR_SIZE + sizeof(*write);
	p = kzalloc(pkt_size, GFP_ATOMIC);
	if (!p)
		return -ENOMEM;

	pkt = p;
	write = p + APR_HDR_SIZE;

	spin_lock_irqsave(&ac->lock, flags);
	port = &ac->port[SNDRV_PCM_STREAM_PLAYBACK];
	q6asm_add_hdr(ac, &pkt->hdr, pkt_size, false, ac->stream_id);

	ab = &port->buf[port->dsp_buf];
	pkt->hdr.token = port->dsp_buf;
	pkt->hdr.opcode = ASM_DATA_CMD_WRITE_V2;
	write->buf_addr_lsw = lower_32_bits(ab->phys);
	write->buf_addr_msw = upper_32_bits(ab->phys);
	write->buf_size = len;
	write->seq_id = port->dsp_buf;
	write->timestamp_lsw = lsw_ts;
	write->timestamp_msw = msw_ts;
	write->mem_map_handle =
	    ac->port[SNDRV_PCM_STREAM_PLAYBACK].mem_map_handle;

	if (wflags == NO_TIMESTAMP)
		write->flags = (wflags & 0x800000FF);
	else
		write->flags = (0x80000000 | wflags);

	port->dsp_buf++;

	if (port->dsp_buf >= port->num_periods)
		port->dsp_buf = 0;

	spin_unlock_irqrestore(&ac->lock, flags);
	rc = apr_send_pkt(ac->adev, pkt);
	if (rc == pkt_size)
		rc = 0;

	kfree(pkt);
	return rc;
}
EXPORT_SYMBOL_GPL(q6asm_write_async);

static void q6asm_reset_buf_state(struct audio_client *ac)
{
	struct audio_port_data *port = NULL;
	unsigned long flags;

	spin_lock_irqsave(&ac->lock, flags);
	port = &ac->port[SNDRV_PCM_STREAM_PLAYBACK];
	port->dsp_buf = 0;
	port = &ac->port[SNDRV_PCM_STREAM_CAPTURE];
	port->dsp_buf = 0;
	spin_unlock_irqrestore(&ac->lock, flags);
}

static int __q6asm_cmd(struct audio_client *ac, int cmd, bool wait)
{
	int stream_id = ac->stream_id;
	struct apr_pkt pkt;
	int rc;

	q6asm_add_hdr(ac, &pkt.hdr, APR_HDR_SIZE, true, stream_id);

	switch (cmd) {
	case CMD_PAUSE:
		pkt.hdr.opcode = ASM_SESSION_CMD_PAUSE;
		break;
	case CMD_SUSPEND:
		pkt.hdr.opcode = ASM_SESSION_CMD_SUSPEND;
		break;
	case CMD_FLUSH:
		pkt.hdr.opcode = ASM_STREAM_CMD_FLUSH;
		break;
	case CMD_OUT_FLUSH:
		pkt.hdr.opcode = ASM_STREAM_CMD_FLUSH_READBUFS;
		break;
	case CMD_EOS:
		pkt.hdr.opcode = ASM_DATA_CMD_EOS;
		break;
	case CMD_CLOSE:
		pkt.hdr.opcode = ASM_STREAM_CMD_CLOSE;
		break;
	default:
		return -EINVAL;
	}

	if (wait)
		rc = q6asm_ac_send_cmd_sync(ac, &pkt);
	else
		return apr_send_pkt(ac->adev, &pkt);

	if (rc < 0)
		return rc;

	if (cmd == CMD_FLUSH)
		q6asm_reset_buf_state(ac);

	return 0;
}

/**
 * q6asm_cmd() - run cmd on audio client
 *
 * @ac: audio client pointer
 * @cmd: command to run on audio client.
 *
 * Return: Will be an negative value on error or zero on success
 */
int q6asm_cmd(struct audio_client *ac, int cmd)
{
	return __q6asm_cmd(ac, cmd, true);
}
EXPORT_SYMBOL_GPL(q6asm_cmd);

/**
 * q6asm_cmd_nowait() - non blocking, run cmd on audio client
 *
 * @ac: audio client pointer
 * @cmd: command to run on audio client.
 *
 * Return: Will be an negative value on error or zero on success
 */
int q6asm_cmd_nowait(struct audio_client *ac, int cmd)
{
	return __q6asm_cmd(ac, cmd, false);
}
EXPORT_SYMBOL_GPL(q6asm_cmd_nowait);

static int q6asm_probe(struct apr_device *adev)
{
	struct device *dev = &adev->dev;
	struct q6asm *q6asm;

	q6asm = devm_kzalloc(dev, sizeof(*q6asm), GFP_KERNEL);
	if (!q6asm)
		return -ENOMEM;

	q6core_get_svc_api_info(adev->svc_id, &q6asm->ainfo);

	q6asm->dev = dev;
	q6asm->adev = adev;
	init_waitqueue_head(&q6asm->mem_wait);
	spin_lock_init(&q6asm->slock);
	dev_set_drvdata(dev, q6asm);

	return of_platform_populate(dev->of_node, NULL, NULL, dev);
}

static int q6asm_remove(struct apr_device *adev)
{
	of_platform_depopulate(&adev->dev);

	return 0;
}
static const struct of_device_id q6asm_device_id[]  = {
	{ .compatible = "qcom,q6asm" },
	{},
};
MODULE_DEVICE_TABLE(of, q6asm_device_id);

static struct apr_driver qcom_q6asm_driver = {
	.probe = q6asm_probe,
	.remove = q6asm_remove,
	.callback = q6asm_srvc_callback,
	.driver = {
		.name = "qcom-q6asm",
		.of_match_table = of_match_ptr(q6asm_device_id),
	},
};

module_apr_driver(qcom_q6asm_driver);
MODULE_DESCRIPTION("Q6 Audio Stream Manager driver");
MODULE_LICENSE("GPL v2");