summaryrefslogtreecommitdiffstats
path: root/sound/pci/echoaudio/echoaudio_dsp.c
blob: 4df51ef5e09533231100d94aa1bc35404e992df3 (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
/****************************************************************************

   Copyright Echo Digital Audio Corporation (c) 1998 - 2004
   All rights reserved
   www.echoaudio.com

   This file is part of Echo Digital Audio's generic driver library.

   Echo Digital Audio's generic driver library is free software;
   you can redistribute it and/or modify it under the terms of
   the GNU General Public License 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., 59 Temple Place - Suite 330, Boston,
   MA  02111-1307, USA.

   *************************************************************************

 Translation from C++ and adaptation for use in ALSA-Driver
 were made by Giuliano Pochini <pochini@shiny.it>

****************************************************************************/

#if PAGE_SIZE < 4096
#error PAGE_SIZE is < 4k
#endif

static int restore_dsp_rettings(struct echoaudio *chip);


/* Some vector commands involve the DSP reading or writing data to and from the
comm page; if you send one of these commands to the DSP, it will complete the
command and then write a non-zero value to the Handshake field in the
comm page.  This function waits for the handshake to show up. */
static int wait_handshake(struct echoaudio *chip)
{
	int i;

	/* Wait up to 20ms for the handshake from the DSP */
	for (i = 0; i < HANDSHAKE_TIMEOUT; i++) {
		/* Look for the handshake value */
		barrier();
		if (chip->comm_page->handshake) {
			return 0;
		}
		udelay(1);
	}

	snd_printk(KERN_ERR "wait_handshake(): Timeout waiting for DSP\n");
	return -EBUSY;
}



/* Much of the interaction between the DSP and the driver is done via vector
commands; send_vector writes a vector command to the DSP.  Typically, this
causes the DSP to read or write fields in the comm page.
PCI posting is not required thanks to the handshake logic. */
static int send_vector(struct echoaudio *chip, u32 command)
{
	int i;

	wmb();	/* Flush all pending writes before sending the command */

	/* Wait up to 100ms for the "vector busy" bit to be off */
	for (i = 0; i < VECTOR_BUSY_TIMEOUT; i++) {
		if (!(get_dsp_register(chip, CHI32_VECTOR_REG) &
		      CHI32_VECTOR_BUSY)) {
			set_dsp_register(chip, CHI32_VECTOR_REG, command);
			/*if (i)  DE_ACT(("send_vector time: %d\n", i));*/
			return 0;
		}
		udelay(1);
	}

	DE_ACT((KERN_ERR "timeout on send_vector\n"));
	return -EBUSY;
}



/* write_dsp writes a 32-bit value to the DSP; this is used almost
exclusively for loading the DSP. */
static int write_dsp(struct echoaudio *chip, u32 data)
{
	u32 status, i;

	for (i = 0; i < 10000000; i++) {	/* timeout = 10s */
		status = get_dsp_register(chip, CHI32_STATUS_REG);
		if ((status & CHI32_STATUS_HOST_WRITE_EMPTY) != 0) {
			set_dsp_register(chip, CHI32_DATA_REG, data);
			wmb();			/* write it immediately */
			return 0;
		}
		udelay(1);
		cond_resched();
	}

	chip->bad_board = TRUE;		/* Set TRUE until DSP re-loaded */
	DE_ACT((KERN_ERR "write_dsp: Set bad_board to TRUE\n"));
	return -EIO;
}



/* read_dsp reads a 32-bit value from the DSP; this is used almost
exclusively for loading the DSP and checking the status of the ASIC. */
static int read_dsp(struct echoaudio *chip, u32 *data)
{
	u32 status, i;

	for (i = 0; i < READ_DSP_TIMEOUT; i++) {
		status = get_dsp_register(chip, CHI32_STATUS_REG);
		if ((status & CHI32_STATUS_HOST_READ_FULL) != 0) {
			*data = get_dsp_register(chip, CHI32_DATA_REG);
			return 0;
		}
		udelay(1);
		cond_resched();
	}

	chip->bad_board = TRUE;		/* Set TRUE until DSP re-loaded */
	DE_INIT((KERN_ERR "read_dsp: Set bad_board to TRUE\n"));
	return -EIO;
}



/****************************************************************************
	Firmware loading functions
 ****************************************************************************/

/* This function is used to read back the serial number from the DSP;
this is triggered by the SET_COMMPAGE_ADDR command.
Only some early Echogals products have serial numbers in the ROM;
the serial number is not used, but you still need to do this as
part of the DSP load process. */
static int read_sn(struct echoaudio *chip)
{
	int i;
	u32 sn[6];

	for (i = 0; i < 5; i++) {
		if (read_dsp(chip, &sn[i])) {
			snd_printk(KERN_ERR "Failed to read serial number\n");
			return -EIO;
		}
	}
	DE_INIT(("Read serial number %08x %08x %08x %08x %08x\n",
		 sn[0], sn[1], sn[2], sn[3], sn[4]));
	return 0;
}



#ifndef ECHOCARD_HAS_ASIC
/* This card has no ASIC, just return ok */
static inline int check_asic_status(struct echoaudio *chip)
{
	chip->asic_loaded = TRUE;
	return 0;
}

#endif /* !ECHOCARD_HAS_ASIC */



#ifdef ECHOCARD_HAS_ASIC

/* Load ASIC code - done after the DSP is loaded */
static int load_asic_generic(struct echoaudio *chip, u32 cmd,
			     const struct firmware *asic)
{
	const struct firmware *fw;
	int err;
	u32 i, size;
	u8 *code;

	if ((err = get_firmware(&fw, asic, chip)) < 0) {
		snd_printk(KERN_WARNING "Firmware not found !\n");
		return err;
	}

	code = (u8 *)fw->data;
	size = fw->size;

	/* Send the "Here comes the ASIC" command */
	if (write_dsp(chip, cmd) < 0)
		goto la_error;

	/* Write length of ASIC file in bytes */
	if (write_dsp(chip, size) < 0)
		goto la_error;

	for (i = 0; i < size; i++) {
		if (write_dsp(chip, code[i]) < 0)
			goto la_error;
	}

	DE_INIT(("ASIC loaded\n"));
	free_firmware(fw);
	return 0;

la_error:
	DE_INIT(("failed on write_dsp\n"));
	free_firmware(fw);
	return -EIO;
}

#endif /* ECHOCARD_HAS_ASIC */



#ifdef DSP_56361

/* Install the resident loader for 56361 DSPs;  The resident loader is on
the EPROM on the board for 56301 DSP. The resident loader is a tiny little
program that is used to load the real DSP code. */
static int install_resident_loader(struct echoaudio *chip)
{
	u32 address;
	int index, words, i;
	u16 *code;
	u32 status;
	const struct firmware *fw;

	/* 56361 cards only!  This check is required by the old 56301-based
	Mona and Gina24 */
	if (chip->device_id != DEVICE_ID_56361)
		return 0;

	/* Look to see if the resident loader is present.  If the resident
	loader is already installed, host flag 5 will be on. */
	status = get_dsp_register(chip, CHI32_STATUS_REG);
	if (status & CHI32_STATUS_REG_HF5) {
		DE_INIT(("Resident loader already installed; status is 0x%x\n",
			 status));
		return 0;
	}

	if ((i = get_firmware(&fw, &card_fw[FW_361_LOADER], chip)) < 0) {
		snd_printk(KERN_WARNING "Firmware not found !\n");
		return i;
	}

	/* The DSP code is an array of 16 bit words.  The array is divided up
	into sections.  The first word of each section is the size in words,
	followed by the section type.
	Since DSP addresses and data are 24 bits wide, they each take up two
	16 bit words in the array.
	This is a lot like the other loader loop, but it's not a loop, you
	don't write the memory type, and you don't write a zero at the end. */

	/* Set DSP format bits for 24 bit mode */
	set_dsp_register(chip, CHI32_CONTROL_REG,
			 get_dsp_register(chip, CHI32_CONTROL_REG) | 0x900);

	code = (u16 *)fw->data;

	/* Skip the header section; the first word in the array is the size
	of the first section, so the first real section of code is pointed
	to by Code[0]. */
	index = code[0];

	/* Skip the section size, LRS block type, and DSP memory type */
	index += 3;

	/* Get the number of DSP words to write */
	words = code[index++];

	/* Get the DSP address for this block; 24 bits, so build from two words */
	address = ((u32)code[index] << 16) + code[index + 1];
	index += 2;

	/* Write the count to the DSP */
	if (write_dsp(chip, words)) {
		DE_INIT(("install_resident_loader: Failed to write word count!\n"));
		goto irl_error;
	}
	/* Write the DSP address */
	if (write_dsp(chip, address)) {
		DE_INIT(("install_resident_loader: Failed to write DSP address!\n"));
		goto irl_error;
	}
	/* Write out this block of code to the DSP */
	for (i = 0; i < words; i++) {
		u32 data;

		data = ((u32)code[index] << 16) + code[index + 1];
		if (write_dsp(chip, data)) {
			DE_INIT(("install_resident_loader: Failed to write DSP code\n"));
			goto irl_error;
		}
		index += 2;
	}

	/* Wait for flag 5 to come up */
	for (i = 0; i < 200; i++) {	/* Timeout is 50us * 200 = 10ms */
		udelay(50);
		status = get_dsp_register(chip, CHI32_STATUS_REG);
		if (status & CHI32_STATUS_REG_HF5)
			break;
	}

	if (i == 200) {
		DE_INIT(("Resident loader failed to set HF5\n"));
		goto irl_error;
	}

	DE_INIT(("Resident loader successfully installed\n"));
	free_firmware(fw);
	return 0;

irl_error:
	free_firmware(fw);
	return -EIO;
}

#endif /* DSP_56361 */


static int load_dsp(struct echoaudio *chip, u16 *code)
{
	u32 address, data;
	int index, words, i;

	if (chip->dsp_code == code) {
		DE_INIT(("DSP is already loaded!\n"));
		return 0;
	}
	chip->bad_board = TRUE;		/* Set TRUE until DSP loaded */
	chip->dsp_code = NULL;		/* Current DSP code not loaded */
	chip->asic_loaded = FALSE;	/* Loading the DSP code will reset the ASIC */

	DE_INIT(("load_dsp: Set bad_board to TRUE\n"));

	/* If this board requires a resident loader, install it. */
#ifdef DSP_56361
	if ((i = install_resident_loader(chip)) < 0)
		return i;
#endif

	/* Send software reset command */
	if (send_vector(chip, DSP_VC_RESET) < 0) {
		DE_INIT(("LoadDsp: send_vector DSP_VC_RESET failed, Critical Failure\n"));
		return -EIO;
	}
	/* Delay 10us */
	udelay(10);

	/* Wait 10ms for HF3 to indicate that software reset is complete */
	for (i = 0; i < 1000; i++) {	/* Timeout is 10us * 1000 = 10ms */
		if (get_dsp_register(chip, CHI32_STATUS_REG) &
		    CHI32_STATUS_REG_HF3)
			break;
		udelay(10);
	}

	if (i == 1000) {
		DE_INIT(("load_dsp: Timeout waiting for CHI32_STATUS_REG_HF3\n"));
		return -EIO;
	}

	/* Set DSP format bits for 24 bit mode now that soft reset is done */
	set_dsp_register(chip, CHI32_CONTROL_REG,
			 get_dsp_register(chip, CHI32_CONTROL_REG) | 0x900);

	/* Main loader loop */

	index = code[0];
	for (;;) {
		int block_type, mem_type;

		/* Total Block Size */
		index++;

		/* Block Type */
		block_type = code[index];
		if (block_type == 4)	/* We're finished */
			break;

		index++;

		/* Memory Type  P=0,X=1,Y=2 */
		mem_type = code[index++];

		/* Block Code Size */
		words = code[index++];
		if (words == 0)		/* We're finished */
			break;

		/* Start Address */
		address = ((u32)code[index] << 16) + code[index + 1];
		index += 2;

		if (write_dsp(chip, words) < 0) {
			DE_INIT(("load_dsp: failed to write number of DSP words\n"));
			return -EIO;
		}
		if (write_dsp(chip, address) < 0) {
			DE_INIT(("load_dsp: failed to write DSP address\n"));
			return -EIO;
		}
		if (write_dsp(chip, mem_type) < 0) {
			DE_INIT(("load_dsp: failed to write DSP memory type\n"));
			return -EIO;
		}
		/* Code */
		for (i = 0; i < words; i++, index+=2) {
			data = ((u32)code[index] << 16) + code[index + 1];
			if (write_dsp(chip, data) < 0) {
				DE_INIT(("load_dsp: failed to write DSP data\n"));
				return -EIO;
			}
		}
	}

	if (write_dsp(chip, 0) < 0) {	/* We're done!!! */
		DE_INIT(("load_dsp: Failed to write final zero\n"));
		return -EIO;
	}
	udelay(10);

	for (i = 0; i < 5000; i++) {	/* Timeout is 100us * 5000 = 500ms */
		/* Wait for flag 4 - indicates that the DSP loaded OK */
		if (get_dsp_register(chip, CHI32_STATUS_REG) &
		    CHI32_STATUS_REG_HF4) {
			set_dsp_register(chip, CHI32_CONTROL_REG,
					 get_dsp_register(chip, CHI32_CONTROL_REG) & ~0x1b00);

			if (write_dsp(chip, DSP_FNC_SET_COMMPAGE_ADDR) < 0) {
				DE_INIT(("load_dsp: Failed to write DSP_FNC_SET_COMMPAGE_ADDR\n"));
				return -EIO;
			}

			if (write_dsp(chip, chip->comm_page_phys) < 0) {
				DE_INIT(("load_dsp: Failed to write comm page address\n"));
				return -EIO;
			}

			/* Get the serial number via slave mode.
			This is triggered by the SET_COMMPAGE_ADDR command.
			We don't actually use the serial number but we have to
			get it as part of the DSP init voodoo. */
			if (read_sn(chip) < 0) {
				DE_INIT(("load_dsp: Failed to read serial number\n"));
				return -EIO;
			}

			chip->dsp_code = code;		/* Show which DSP code loaded */
			chip->bad_board = FALSE;	/* DSP OK */
			DE_INIT(("load_dsp: OK!\n"));
			return 0;
		}
		udelay(100);
	}

	DE_INIT(("load_dsp: DSP load timed out waiting for HF4\n"));
	return -EIO;
}



/* load_firmware takes care of loading the DSP and any ASIC code. */
static int load_firmware(struct echoaudio *chip)
{
	const struct firmware *fw;
	int box_type, err;

	if (snd_BUG_ON(!chip->dsp_code_to_load || !chip->comm_page))
		return -EPERM;

	/* See if the ASIC is present and working - only if the DSP is already loaded */
	if (chip->dsp_code) {
		if ((box_type = check_asic_status(chip)) >= 0)
			return box_type;
		/* ASIC check failed; force the DSP to reload */
		chip->dsp_code = NULL;
	}

	if ((err = get_firmware(&fw, chip->dsp_code_to_load, chip)) < 0)
		return err;
	err = load_dsp(chip, (u16 *)fw->data);
	free_firmware(fw);
	if (err < 0)
		return err;

	if ((box_type = load_asic(chip)) < 0)
		return box_type;	/* error */

	if ((err = restore_dsp_rettings(chip)) < 0)
		return err;

	return box_type;
}



/****************************************************************************
	Mixer functions
 ****************************************************************************/

#if defined(ECHOCARD_HAS_INPUT_NOMINAL_LEVEL) || \
	defined(ECHOCARD_HAS_OUTPUT_NOMINAL_LEVEL)

/* Set the nominal level for an input or output bus (true = -10dBV, false = +4dBu) */
static int set_nominal_level(struct echoaudio *chip, u16 index, char consumer)
{
	if (snd_BUG_ON(index >= num_busses_out(chip) + num_busses_in(chip)))
		return -EINVAL;

	/* Wait for the handshake (OK even if ASIC is not loaded) */
	if (wait_handshake(chip))
		return -EIO;

	chip->nominal_level[index] = consumer;

	if (consumer)
		chip->comm_page->nominal_level_mask |= cpu_to_le32(1 << index);
	else
		chip->comm_page->nominal_level_mask &= ~cpu_to_le32(1 << index);

	return 0;
}

#endif /* ECHOCARD_HAS_*_NOMINAL_LEVEL */



/* Set the gain for a single physical output channel (dB). */
static int set_output_gain(struct echoaudio *chip, u16 channel, s8 gain)
{
	if (snd_BUG_ON(channel >= num_busses_out(chip)))
		return -EINVAL;

	if (wait_handshake(chip))
		return -EIO;

	/* Save the new value */
	chip->output_gain[channel] = gain;
	chip->comm_page->line_out_level[channel] = gain;
	return 0;
}



#ifdef ECHOCARD_HAS_MONITOR
/* Set the monitor level from an input bus to an output bus. */
static int set_monitor_gain(struct echoaudio *chip, u16 output, u16 input,
			    s8 gain)
{
	if (snd_BUG_ON(output >= num_busses_out(chip) ||
		    input >= num_busses_in(chip)))
		return -EINVAL;

	if (wait_handshake(chip))
		return -EIO;

	chip->monitor_gain[output][input] = gain;
	chip->comm_page->monitors[monitor_index(chip, output, input)] = gain;
	return 0;
}
#endif /* ECHOCARD_HAS_MONITOR */


/* Tell the DSP to read and update output, nominal & monitor levels in comm page. */
static int update_output_line_level(struct echoaudio *chip)
{
	if (wait_handshake(chip))
		return -EIO;
	clear_handshake(chip);
	return send_vector(chip, DSP_VC_UPDATE_OUTVOL);
}



/* Tell the DSP to read and update input levels in comm page */
static int update_input_line_level(struct echoaudio *chip)
{
	if (wait_handshake(chip))
		return -EIO;
	clear_handshake(chip);
	return send_vector(chip, DSP_VC_UPDATE_INGAIN);
}



/* set_meters_on turns the meters on or off.  If meters are turned on, the DSP
will write the meter and clock detect values to the comm page at about 30Hz */
static void set_meters_on(struct echoaudio *chip, char on)
{
	if (on && !chip->meters_enabled) {
		send_vector(chip, DSP_VC_METERS_ON);
		chip->meters_enabled = 1;
	} else if (!on && chip->meters_enabled) {
		send_vector(chip, DSP_VC_METERS_OFF);
		chip->meters_enabled = 0;
		memset((s8 *)chip->comm_page->vu_meter, ECHOGAIN_MUTED,
		       DSP_MAXPIPES);
		memset((s8 *)chip->comm_page->peak_meter, ECHOGAIN_MUTED,
		       DSP_MAXPIPES);
	}
}



/* Fill out an the given array using the current values in the comm page.
Meters are written in the comm page by the DSP in this order:
 Output busses
 Input busses
 Output pipes (vmixer cards only)

This function assumes there are no more than 16 in/out busses or pipes
Meters is an array [3][16][2] of long. */
static void get_audio_meters(struct echoaudio *chip, long *meters)
{
	int i, m, n;

	m = 0;
	n = 0;
	for (i = 0; i < num_busses_out(chip); i++, m++) {
		meters[n++] = chip->comm_page->vu_meter[m];
		meters[n++] = chip->comm_page->peak_meter[m];
	}
	for (; n < 32; n++)
		meters[n] = 0;

#ifdef ECHOCARD_ECHO3G
	m = E3G_MAX_OUTPUTS;	/* Skip unused meters */
#endif

	for (i = 0; i < num_busses_in(chip); i++, m++) {
		meters[n++] = chip->comm_page->vu_meter[m];
		meters[n++] = chip->comm_page->peak_meter[m];
	}
	for (; n < 64; n++)
		meters[n] = 0;

#ifdef ECHOCARD_HAS_VMIXER
	for (i = 0; i < num_pipes_out(chip); i++, m++) {
		meters[n++] = chip->comm_page->vu_meter[m];
		meters[n++] = chip->comm_page->peak_meter[m];
	}
#endif
	for (; n < 96; n++)
		meters[n] = 0;
}



static int restore_dsp_rettings(struct echoaudio *chip)
{
	int err;
	DE_INIT(("restore_dsp_settings\n"));

	if ((err = check_asic_status(chip)) < 0)
		return err;

	/* @ Gina20/Darla20 only. Should be harmless for other cards. */
	chip->comm_page->gd_clock_state = GD_CLOCK_UNDEF;
	chip->comm_page->gd_spdif_status = GD_SPDIF_STATUS_UNDEF;
	chip->comm_page->handshake = 0xffffffff;

	if ((err = set_sample_rate(chip, chip->sample_rate)) < 0)
		return err;

	if (chip->meters_enabled)
		if (send_vector(chip, DSP_VC_METERS_ON) < 0)
			return -EIO;

#ifdef ECHOCARD_HAS_EXTERNAL_CLOCK
	if (set_input_clock(chip, chip->input_clock) < 0)
		return -EIO;
#endif

#ifdef ECHOCARD_HAS_OUTPUT_CLOCK_SWITCH
	if (set_output_clock(chip, chip->output_clock) < 0)
		return -EIO;
#endif

	if (update_output_line_level(chip) < 0)
		return -EIO;

	if (update_input_line_level(chip) < 0)
		return -EIO;

#ifdef ECHOCARD_HAS_VMIXER
	if (update_vmixer_level(chip) < 0)
		return -EIO;
#endif

	if (wait_handshake(chip) < 0)
		return -EIO;
	clear_handshake(chip);

	DE_INIT(("restore_dsp_rettings done\n"));
	return send_vector(chip, DSP_VC_UPDATE_FLAGS);
}



/****************************************************************************
	Transport functions
 ****************************************************************************/

/* set_audio_format() sets the format of the audio data in host memory for
this pipe.  Note that _MS_ (mono-to-stereo) playback modes are not used by ALSA
but they are here because they are just mono while capturing */
static void set_audio_format(struct echoaudio *chip, u16 pipe_index,
			     const struct audioformat *format)
{
	u16 dsp_format;

	dsp_format = DSP_AUDIOFORM_SS_16LE;

	/* Look for super-interleave (no big-endian and 8 bits) */
	if (format->interleave > 2) {
		switch (format->bits_per_sample) {
		case 16:
			dsp_format = DSP_AUDIOFORM_SUPER_INTERLEAVE_16LE;
			break;
		case 24:
			dsp_format = DSP_AUDIOFORM_SUPER_INTERLEAVE_24LE;
			break;
		case 32:
			dsp_format = DSP_AUDIOFORM_SUPER_INTERLEAVE_32LE;
			break;
		}
		dsp_format |= format->interleave;
	} else if (format->data_are_bigendian) {
		/* For big-endian data, only 32 bit samples are supported */
		switch (format->interleave) {
		case 1:
			dsp_format = DSP_AUDIOFORM_MM_32BE;
			break;
#ifdef ECHOCARD_HAS_STEREO_BIG_ENDIAN32
		case 2:
			dsp_format = DSP_AUDIOFORM_SS_32BE;
			break;
#endif
		}
	} else if (format->interleave == 1 &&
		   format->bits_per_sample == 32 && !format->mono_to_stereo) {
		/* 32 bit little-endian mono->mono case */
		dsp_format = DSP_AUDIOFORM_MM_32LE;
	} else {
		/* Handle the other little-endian formats */
		switch (format->bits_per_sample) {
		case 8:
			if (format->interleave == 2)
				dsp_format = DSP_AUDIOFORM_SS_8;
			else
				dsp_format = DSP_AUDIOFORM_MS_8;
			break;
		default:
		case 16:
			if (format->interleave == 2)
				dsp_format = DSP_AUDIOFORM_SS_16LE;
			else
				dsp_format = DSP_AUDIOFORM_MS_16LE;
			break;
		case 24:
			if (format->interleave == 2)
				dsp_format = DSP_AUDIOFORM_SS_24LE;
			else
				dsp_format = DSP_AUDIOFORM_MS_24LE;
			break;
		case 32:
			if (format->interleave == 2)
				dsp_format = DSP_AUDIOFORM_SS_32LE;
			else
				dsp_format = DSP_AUDIOFORM_MS_32LE;
			break;
		}
	}
	DE_ACT(("set_audio_format[%d] = %x\n", pipe_index, dsp_format));
	chip->comm_page->audio_format[pipe_index] = cpu_to_le16(dsp_format);
}



/* start_transport starts transport for a set of pipes.
The bits 1 in channel_mask specify what pipes to start. Only the bit of the
first channel must be set, regardless its interleave.
Same thing for pause_ and stop_ -trasport below. */
static int start_transport(struct echoaudio *chip, u32 channel_mask,
			   u32 cyclic_mask)
{
	DE_ACT(("start_transport %x\n", channel_mask));

	if (wait_handshake(chip))
		return -EIO;

	chip->comm_page->cmd_start |= cpu_to_le32(channel_mask);

	if (chip->comm_page->cmd_start) {
		clear_handshake(chip);
		send_vector(chip, DSP_VC_START_TRANSFER);
		if (wait_handshake(chip))
			return -EIO;
		/* Keep track of which pipes are transporting */
		chip->active_mask |= channel_mask;
		chip->comm_page->cmd_start = 0;
		return 0;
	}

	DE_ACT(("start_transport: No pipes to start!\n"));
	return -EINVAL;
}



static int pause_transport(struct echoaudio *chip, u32 channel_mask)
{
	DE_ACT(("pause_transport %x\n", channel_mask));

	if (wait_handshake(chip))
		return -EIO;

	chip->comm_page->cmd_stop |= cpu_to_le32(channel_mask);
	chip->comm_page->cmd_reset = 0;
	if (chip->comm_page->cmd_stop) {
		clear_handshake(chip);
		send_vector(chip, DSP_VC_STOP_TRANSFER);
		if (wait_handshake(chip))
			return -EIO;
		/* Keep track of which pipes are transporting */
		chip->active_mask &= ~channel_mask;
		chip->comm_page->cmd_stop = 0;
		chip->comm_page->cmd_reset = 0;
		return 0;
	}

	DE_ACT(("pause_transport: No pipes to stop!\n"));
	return 0;
}



static int stop_transport(struct echoaudio *chip, u32 channel_mask)
{
	DE_ACT(("stop_transport %x\n", channel_mask));

	if (wait_handshake(chip))
		return -EIO;

	chip->comm_page->cmd_stop |= cpu_to_le32(channel_mask);
	chip->comm_page->cmd_reset |= cpu_to_le32(channel_mask);
	if (chip->comm_page->cmd_reset) {
		clear_handshake(chip);
		send_vector(chip, DSP_VC_STOP_TRANSFER);
		if (wait_handshake(chip))
			return -EIO;
		/* Keep track of which pipes are transporting */
		chip->active_mask &= ~channel_mask;
		chip->comm_page->cmd_stop = 0;
		chip->comm_page->cmd_reset = 0;
		return 0;
	}

	DE_ACT(("stop_transport: No pipes to stop!\n"));
	return 0;
}



static inline int is_pipe_allocated(struct echoaudio *chip, u16 pipe_index)
{
	return (chip->pipe_alloc_mask & (1 << pipe_index));
}



/* Stops everything and turns off the DSP. All pipes should be already
stopped and unallocated. */
static int rest_in_peace(struct echoaudio *chip)
{
	DE_ACT(("rest_in_peace() open=%x\n", chip->pipe_alloc_mask));

	/* Stops all active pipes (just to be sure) */
	stop_transport(chip, chip->active_mask);

	set_meters_on(chip, FALSE);

#ifdef ECHOCARD_HAS_MIDI
	enable_midi_input(chip, FALSE);
#endif

	/* Go to sleep */
	if (chip->dsp_code) {
		/* Make load_firmware do a complete reload */
		chip->dsp_code = NULL;
		/* Put the DSP to sleep */
		return send_vector(chip, DSP_VC_GO_COMATOSE);
	}
	return 0;
}



/* Fills the comm page with default values */
static int init_dsp_comm_page(struct echoaudio *chip)
{
	/* Check if the compiler added extra padding inside the structure */
	if (offsetof(struct comm_page, midi_output) != 0xbe0) {
		DE_INIT(("init_dsp_comm_page() - Invalid struct comm_page structure\n"));
		return -EPERM;
	}

	/* Init all the basic stuff */
	chip->card_name = ECHOCARD_NAME;
	chip->bad_board = TRUE;	/* Set TRUE until DSP loaded */
	chip->dsp_code = NULL;	/* Current DSP code not loaded */
	chip->digital_mode = DIGITAL_MODE_NONE;
	chip->input_clock = ECHO_CLOCK_INTERNAL;
	chip->output_clock = ECHO_CLOCK_WORD;
	chip->asic_loaded = FALSE;
	memset(chip->comm_page, 0, sizeof(struct comm_page));

	/* Init the comm page */
	chip->comm_page->comm_size =
		cpu_to_le32(sizeof(struct comm_page));
	chip->comm_page->handshake = 0xffffffff;
	chip->comm_page->midi_out_free_count =
		cpu_to_le32(DSP_MIDI_OUT_FIFO_SIZE);
	chip->comm_page->sample_rate = cpu_to_le32(44100);
	chip->sample_rate = 44100;

	/* Set line levels so we don't blast any inputs on startup */
	memset(chip->comm_page->monitors, ECHOGAIN_MUTED, MONITOR_ARRAY_SIZE);
	memset(chip->comm_page->vmixer, ECHOGAIN_MUTED, VMIXER_ARRAY_SIZE);

	return 0;
}



/* This function initializes the several volume controls for busses and pipes.
This MUST be called after the DSP is up and running ! */
static int init_line_levels(struct echoaudio *chip)
{
	int st, i, o;

	DE_INIT(("init_line_levels\n"));

	/* Mute output busses */
	for (i = 0; i < num_busses_out(chip); i++)
		if ((st = set_output_gain(chip, i, ECHOGAIN_MUTED)))
			return st;
	if ((st = update_output_line_level(chip)))
		return st;

#ifdef ECHOCARD_HAS_VMIXER
	/* Mute the Vmixer */
	for (i = 0; i < num_pipes_out(chip); i++)
		for (o = 0; o < num_busses_out(chip); o++)
			if ((st = set_vmixer_gain(chip, o, i, ECHOGAIN_MUTED)))
				return st;
	if ((st = update_vmixer_level(chip)))
		return st;
#endif /* ECHOCARD_HAS_VMIXER */

#ifdef ECHOCARD_HAS_MONITOR
	/* Mute the monitor mixer */
	for (o = 0; o < num_busses_out(chip); o++)
		for (i = 0; i < num_busses_in(chip); i++)
			if ((st = set_monitor_gain(chip, o, i, ECHOGAIN_MUTED)))
				return st;
	if ((st = update_output_line_level(chip)))
		return st;
#endif /* ECHOCARD_HAS_MONITOR */

#ifdef ECHOCARD_HAS_INPUT_GAIN
	for (i = 0; i < num_busses_in(chip); i++)
		if ((st = set_input_gain(chip, i, ECHOGAIN_MUTED)))
			return st;
	if ((st = update_input_line_level(chip)))
		return st;
#endif /* ECHOCARD_HAS_INPUT_GAIN */

	return 0;
}



/* This is low level part of the interrupt handler.
It returns -1 if the IRQ is not ours, or N>=0 if it is, where N is the number
of midi data in the input queue. */
static int service_irq(struct echoaudio *chip)
{
	int st;

	/* Read the DSP status register and see if this DSP generated this interrupt */
	if (get_dsp_register(chip, CHI32_STATUS_REG) & CHI32_STATUS_IRQ) {
		st = 0;
#ifdef ECHOCARD_HAS_MIDI
		/* Get and parse midi data if present */
		if (chip->comm_page->midi_input[0])	/* The count is at index 0 */
			st = midi_service_irq(chip);	/* Returns how many midi bytes we received */
#endif
		/* Clear the hardware interrupt */
		chip->comm_page->midi_input[0] = 0;
		send_vector(chip, DSP_VC_ACK_INT);
		return st;
	}
	return -1;
}




/******************************************************************************
	Functions for opening and closing pipes
 ******************************************************************************/

/* allocate_pipes is used to reserve audio pipes for your exclusive use.
The call will fail if some pipes are already allocated. */
static int allocate_pipes(struct echoaudio *chip, struct audiopipe *pipe,
			  int pipe_index, int interleave)
{
	int i;
	u32 channel_mask;
	char is_cyclic;

	DE_ACT(("allocate_pipes: ch=%d int=%d\n", pipe_index, interleave));

	if (chip->bad_board)
		return -EIO;

	is_cyclic = 1;	/* This driver uses cyclic buffers only */

	for (channel_mask = i = 0; i < interleave; i++)
		channel_mask |= 1 << (pipe_index + i);
	if (chip->pipe_alloc_mask & channel_mask) {
		DE_ACT(("allocate_pipes: channel already open\n"));
		return -EAGAIN;
	}

	chip->comm_page->position[pipe_index] = 0;
	chip->pipe_alloc_mask |= channel_mask;
	if (is_cyclic)
		chip->pipe_cyclic_mask |= channel_mask;
	pipe->index = pipe_index;
	pipe->interleave = interleave;
	pipe->state = PIPE_STATE_STOPPED;

	/* The counter register is where the DSP writes the 32 bit DMA
	position for a pipe.  The DSP is constantly updating this value as
	it moves data. The DMA counter is in units of bytes, not samples. */
	pipe->dma_counter = &chip->comm_page->position[pipe_index];
	*pipe->dma_counter = 0;
	DE_ACT(("allocate_pipes: ok\n"));
	return pipe_index;
}



static int free_pipes(struct echoaudio *chip, struct audiopipe *pipe)
{
	u32 channel_mask;
	int i;

	DE_ACT(("free_pipes: Pipe %d\n", pipe->index));
	if (snd_BUG_ON(!is_pipe_allocated(chip, pipe->index)))
		return -EINVAL;
	if (snd_BUG_ON(pipe->state != PIPE_STATE_STOPPED))
		return -EINVAL;

	for (channel_mask = i = 0; i < pipe->interleave; i++)
		channel_mask |= 1 << (pipe->index + i);

	chip->pipe_alloc_mask &= ~channel_mask;
	chip->pipe_cyclic_mask &= ~channel_mask;
	return 0;
}



/******************************************************************************
	Functions for managing the scatter-gather list
******************************************************************************/

static int sglist_init(struct echoaudio *chip, struct audiopipe *pipe)
{
	pipe->sglist_head = 0;
	memset(pipe->sgpage.area, 0, PAGE_SIZE);
	chip->comm_page->sglist_addr[pipe->index].addr =
		cpu_to_le32(pipe->sgpage.addr);
	return 0;
}



static int sglist_add_mapping(struct echoaudio *chip, struct audiopipe *pipe,
				dma_addr_t address, size_t length)
{
	int head = pipe->sglist_head;
	struct sg_entry *list = (struct sg_entry *)pipe->sgpage.area;

	if (head < MAX_SGLIST_ENTRIES - 1) {
		list[head].addr = cpu_to_le32(address);
		list[head].size = cpu_to_le32(length);
		pipe->sglist_head++;
	} else {
		DE_ACT(("SGlist: too many fragments\n"));
		return -ENOMEM;
	}
	return 0;
}



static inline int sglist_add_irq(struct echoaudio *chip, struct audiopipe *pipe)
{
	return sglist_add_mapping(chip, pipe, 0, 0);
}



static inline int sglist_wrap(struct echoaudio *chip, struct audiopipe *pipe)
{
	return sglist_add_mapping(chip, pipe, pipe->sgpage.addr, 0);
}
OpenPOWER on IntegriCloud