aboutsummaryrefslogtreecommitdiffstats
path: root/sound/oss/harmony.c
blob: 591683c55f2778f503429d13bbdd1c16ba814a88 (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
/*
 	drivers/sound/harmony.c 

	This is a sound driver for ASP's and Lasi's Harmony sound chip
	and is unlikely to be used for anything other than on a HP PA-RISC.

	Harmony is found in HP 712s, 715/new and many other GSC based machines.
	On older 715 machines you'll find the technically identical chip 
	called 'Vivace'. Both Harmony and Vicace are supported by this driver.

	Copyright 2000 (c) Linuxcare Canada, Alex deVries <alex@onefishtwo.ca>
	Copyright 2000-2003 (c) Helge Deller <deller@gmx.de>
	Copyright 2001 (c) Matthieu Delahaye <delahaym@esiee.fr>
	Copyright 2001 (c) Jean-Christophe Vaugeois <vaugeoij@esiee.fr>
	Copyright 2004 (c) Stuart Brady <sdbrady@ntlworld.com>

				
TODO:
	- fix SNDCTL_DSP_GETOSPACE and SNDCTL_DSP_GETISPACE ioctls to
		return the real values
	- add private ioctl for selecting line- or microphone input
		(only one of them is available at the same time)
	- add module parameters
	- implement mmap functionality
	- implement gain meter ?
	- ...
*/

#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/types.h>
#include <linux/mm.h>
#include <linux/pci.h>

#include <asm/parisc-device.h>
#include <asm/io.h>

#include "sound_config.h"


#define PFX "harmony: "
#define HARMONY_VERSION "V0.9a"

#undef DEBUG
#ifdef DEBUG
# define DPRINTK printk 
#else
# define DPRINTK(x,...)
#endif


#define MAX_BUFS 10		/* maximum number of rotating buffers */
#define HARMONY_BUF_SIZE 4096	/* needs to be a multiple of PAGE_SIZE (4096)! */

#define CNTL_C		0x80000000
#define	CNTL_ST		0x00000020
#define CNTL_44100	0x00000015	/* HARMONY_SR_44KHZ */
#define CNTL_8000	0x00000008	/* HARMONY_SR_8KHZ */

#define GAINCTL_HE	0x08000000
#define GAINCTL_LE	0x04000000
#define GAINCTL_SE	0x02000000

#define DSTATUS_PN	0x00000200
#define DSTATUS_RN	0x00000002

#define DSTATUS_IE	0x80000000

#define HARMONY_DF_16BIT_LINEAR	0
#define HARMONY_DF_8BIT_ULAW	1
#define HARMONY_DF_8BIT_ALAW	2

#define HARMONY_SS_MONO		0
#define HARMONY_SS_STEREO	1

#define HARMONY_SR_8KHZ		0x08
#define HARMONY_SR_16KHZ	0x09
#define HARMONY_SR_27KHZ	0x0A
#define HARMONY_SR_32KHZ	0x0B
#define HARMONY_SR_48KHZ	0x0E
#define HARMONY_SR_9KHZ		0x0F
#define HARMONY_SR_5KHZ		0x10
#define HARMONY_SR_11KHZ	0x11
#define HARMONY_SR_18KHZ	0x12
#define HARMONY_SR_22KHZ	0x13
#define HARMONY_SR_37KHZ	0x14
#define HARMONY_SR_44KHZ	0x15
#define HARMONY_SR_33KHZ	0x16
#define HARMONY_SR_6KHZ		0x17

/*
 * Some magics numbers used to auto-detect file formats
 */

#define HARMONY_MAGIC_8B_ULAW	1
#define HARMONY_MAGIC_8B_ALAW	27
#define HARMONY_MAGIC_16B_LINEAR 3
#define HARMONY_MAGIC_MONO	1
#define HARMONY_MAGIC_STEREO	2

/*
 * Channels Positions in mixer register
 */

#define GAIN_HE_SHIFT   27
#define GAIN_HE_MASK    ( 1 << GAIN_HE_SHIFT) 
#define GAIN_LE_SHIFT   26
#define GAIN_LE_MASK    ( 1 << GAIN_LE_SHIFT) 
#define GAIN_SE_SHIFT   25
#define GAIN_SE_MASK    ( 1 << GAIN_SE_SHIFT) 
#define GAIN_IS_SHIFT   24
#define GAIN_IS_MASK    ( 1 << GAIN_IS_SHIFT) 
#define GAIN_MA_SHIFT   20
#define GAIN_MA_MASK    ( 0x0f << GAIN_MA_SHIFT) 
#define GAIN_LI_SHIFT   16
#define GAIN_LI_MASK    ( 0x0f << GAIN_LI_SHIFT) 
#define GAIN_RI_SHIFT   12
#define GAIN_RI_MASK    ( 0x0f << GAIN_RI_SHIFT) 
#define GAIN_LO_SHIFT   6
#define GAIN_LO_MASK    ( 0x3f << GAIN_LO_SHIFT) 
#define GAIN_RO_SHIFT   0
#define GAIN_RO_MASK    ( 0x3f << GAIN_RO_SHIFT) 


#define MAX_OUTPUT_LEVEL  (GAIN_RO_MASK >> GAIN_RO_SHIFT)
#define MAX_INPUT_LEVEL   (GAIN_RI_MASK >> GAIN_RI_SHIFT)
#define MAX_MONITOR_LEVEL (GAIN_MA_MASK >> GAIN_MA_SHIFT)

#define MIXER_INTERNAL   SOUND_MIXER_LINE1
#define MIXER_LINEOUT    SOUND_MIXER_LINE2
#define MIXER_HEADPHONES SOUND_MIXER_LINE3

#define MASK_INTERNAL   SOUND_MASK_LINE1
#define MASK_LINEOUT    SOUND_MASK_LINE2
#define MASK_HEADPHONES SOUND_MASK_LINE3

/*
 * Channels Mask in mixer register
 */

#define GAIN_TOTAL_SILENCE 0x00F00FFF
#define GAIN_DEFAULT       0x0FF00000


struct harmony_hpa {
	u8	unused000;
	u8	id;
	u8	teleshare_id;
	u8	unused003;
	u32	reset;
	u32	cntl;
	u32	gainctl;
	u32	pnxtadd;
	u32	pcuradd;
	u32	rnxtadd;
	u32	rcuradd;
	u32	dstatus;
	u32	ov;
	u32	pio;
	u32	unused02c;
	u32	unused030[3];
	u32	diag;
};

struct harmony_dev {
	struct harmony_hpa *hpa;
	struct parisc_device *dev;
	u32 current_gain;
	u32 dac_rate;		/* 8000 ... 48000 (Hz) */
	u8 data_format;		/* HARMONY_DF_xx_BIT_xxx */
	u8 sample_rate;		/* HARMONY_SR_xx_KHZ */
	u8 stereo_select;	/* HARMONY_SS_MONO or HARMONY_SS_STEREO */
	int format_initialized  :1;
	int suspended_playing   :1;
	int suspended_recording :1;
	
	int blocked_playing     :1;
	int blocked_recording   :1;
	int audio_open		:1;
	int mixer_open		:1;
	
	wait_queue_head_t wq_play, wq_record;
	int first_filled_play;	/* first buffer containing data (next to play) */
	int nb_filled_play; 
	int play_offset;
	int first_filled_record;
	int nb_filled_record;
		
	int dsp_unit, mixer_unit;
};


static struct harmony_dev harmony;


/*
 * Dynamic sound buffer allocation and DMA memory
 */

struct harmony_buffer {
	unsigned char *addr;
	dma_addr_t dma_handle;
	int dma_coherent;	/* Zero if dma_alloc_coherent() fails */
	unsigned int len;
};

/*
 * Harmony memory buffers
 */

static struct harmony_buffer played_buf, recorded_buf, silent, graveyard;


#define CHECK_WBACK_INV_OFFSET(b,offset,len) \
        do { if (!b.dma_coherent) \
		dma_cache_wback_inv((unsigned long)b.addr+offset,len); \
	} while (0) 

	
static int __init harmony_alloc_buffer(struct harmony_buffer *b, 
		unsigned int buffer_count)
{
	b->len = buffer_count * HARMONY_BUF_SIZE;
	b->addr = dma_alloc_coherent(&harmony.dev->dev, 
			  b->len, &b->dma_handle, GFP_KERNEL|GFP_DMA);
	if (b->addr && b->dma_handle) {
		b->dma_coherent = 1;
		DPRINTK(KERN_INFO PFX "coherent memory: 0x%lx, played_buf: 0x%lx\n",
				(unsigned long)b->dma_handle, (unsigned long)b->addr);
	} else {
		b->dma_coherent = 0;
		/* kmalloc()ed memory will HPMC on ccio machines ! */
		b->addr = kmalloc(b->len, GFP_KERNEL);
		if (!b->addr) {
			printk(KERN_ERR PFX "couldn't allocate memory\n");
			return -EBUSY;
		}
		b->dma_handle = __pa(b->addr);
	}
	return 0;
}

static void __exit harmony_free_buffer(struct harmony_buffer *b)
{
	if (!b->addr)
		return;

	if (b->dma_coherent)
		dma_free_coherent(&harmony.dev->dev,
				b->len, b->addr, b->dma_handle);
	else
		kfree(b->addr);

	memset(b, 0, sizeof(*b));
}



/*
 * Low-Level sound-chip programming
 */

static void __inline__ harmony_wait_CNTL(void)
{
	/* Wait until we're out of control mode */
	while (gsc_readl(&harmony.hpa->cntl) & CNTL_C)
		/* wait */ ;
}


static void harmony_update_control(void) 
{
	u32 default_cntl;
	
	/* Set CNTL */
	default_cntl = (CNTL_C |  		/* The C bit */
		(harmony.data_format << 6) |	/* Set the data format */
		(harmony.stereo_select << 5) |	/* Stereo select */
		(harmony.sample_rate));		/* Set sample rate */
	harmony.format_initialized = 1;
	
	/* initialize CNTL */
	gsc_writel(default_cntl, &harmony.hpa->cntl);
}

static void harmony_set_control(u8 data_format, u8 sample_rate, u8 stereo_select) 
{
	harmony.sample_rate = sample_rate;
	harmony.data_format = data_format;
	harmony.stereo_select = stereo_select;
	harmony_update_control();
}

static void harmony_set_rate(u8 data_rate) 
{
	harmony.sample_rate = data_rate;
	harmony_update_control();
}

static int harmony_detect_rate(int *freq)
{
	int newrate;
	switch (*freq) {
	case 8000:	newrate = HARMONY_SR_8KHZ;	break;
	case 16000:	newrate = HARMONY_SR_16KHZ;	break; 
	case 27428:	newrate = HARMONY_SR_27KHZ;	break; 
	case 32000:	newrate = HARMONY_SR_32KHZ;	break; 
	case 48000:	newrate = HARMONY_SR_48KHZ;	break; 
	case 9600:	newrate = HARMONY_SR_9KHZ;	break; 
	case 5512:	newrate = HARMONY_SR_5KHZ;	break; 
	case 11025:	newrate = HARMONY_SR_11KHZ;	break; 
	case 18900:	newrate = HARMONY_SR_18KHZ;	break; 
	case 22050:	newrate = HARMONY_SR_22KHZ;	break; 
	case 37800:	newrate = HARMONY_SR_37KHZ;	break; 
	case 44100:	newrate = HARMONY_SR_44KHZ;	break; 
	case 33075:	newrate = HARMONY_SR_33KHZ;	break; 
	case 6615:	newrate = HARMONY_SR_6KHZ;	break; 
	default:	newrate = HARMONY_SR_8KHZ; 
			*freq = 8000;			break;
	}
	return newrate;
}

static void harmony_set_format(u8 data_format) 
{
	harmony.data_format = data_format;
	harmony_update_control();
}

static void harmony_set_stereo(u8 stereo_select) 
{
	harmony.stereo_select = stereo_select;
	harmony_update_control();
}

static void harmony_disable_interrupts(void) 
{
	harmony_wait_CNTL();
	gsc_writel(0, &harmony.hpa->dstatus); 
}

static void harmony_enable_interrupts(void) 
{
	harmony_wait_CNTL();
	gsc_writel(DSTATUS_IE, &harmony.hpa->dstatus); 
}

/*
 * harmony_silence()
 *
 * This subroutine fills in a buffer starting at location start and
 * silences for length bytes.  This references the current
 * configuration of the audio format.
 *
 */

static void harmony_silence(struct harmony_buffer *buffer, int start, int length) 
{
	u8 silence_char;

	/* Despite what you hear, silence is different in
	   different audio formats.  */
	switch (harmony.data_format) {
		case HARMONY_DF_8BIT_ULAW:	silence_char = 0x55; break;
		case HARMONY_DF_8BIT_ALAW:	silence_char = 0xff; break;
		case HARMONY_DF_16BIT_LINEAR:	/* fall through */
		default:			silence_char = 0;
	}

	memset(buffer->addr+start, silence_char, length);
}


static int harmony_audio_open(struct inode *inode, struct file *file)
{
	if (harmony.audio_open) 
		return -EBUSY;
	
	harmony.audio_open = 1;
	harmony.suspended_playing = harmony.suspended_recording = 1;
	harmony.blocked_playing   = harmony.blocked_recording   = 0;
	harmony.first_filled_play = harmony.first_filled_record = 0;
	harmony.nb_filled_play    = harmony.nb_filled_record    = 0;
	harmony.play_offset = 0;
	init_waitqueue_head(&harmony.wq_play);
	init_waitqueue_head(&harmony.wq_record);
	
	/* Start off in a balanced mode. */
	harmony_set_control(HARMONY_DF_8BIT_ULAW, HARMONY_SR_8KHZ, HARMONY_SS_MONO);
	harmony_update_control();
	harmony.format_initialized = 0;

	/* Clear out all the buffers and flush to cache */
	harmony_silence(&played_buf, 0, HARMONY_BUF_SIZE*MAX_BUFS);
	CHECK_WBACK_INV_OFFSET(played_buf, 0, HARMONY_BUF_SIZE*MAX_BUFS);
	
	return 0;
}

/*
 * Release (close) the audio device.
 */

static int harmony_audio_release(struct inode *inode, struct file *file)
{
	if (!harmony.audio_open) 
		return -EBUSY;
	
	harmony.audio_open = 0;

	return 0;
}

/*
 * Read recorded data off the audio device.
 */

static ssize_t harmony_audio_read(struct file *file,
                                char *buffer,
                                size_t size_count,
                                loff_t *ppos)
{
	int total_count = (int) size_count;
	int count = 0;
	int buf_to_read;

	while (count<total_count) {
		/* Wait until we're out of control mode */
		harmony_wait_CNTL();
		
		/* Figure out which buffer to fill in */
		if (harmony.nb_filled_record <= 2) {
			harmony.blocked_recording = 1;
		        if (harmony.suspended_recording) {
				harmony.suspended_recording = 0;
				harmony_enable_interrupts();
			}
							
			interruptible_sleep_on(&harmony.wq_record);
			harmony.blocked_recording = 0;
		}
		
		if (harmony.nb_filled_record < 2)
			return -EBUSY;
		
		buf_to_read = harmony.first_filled_record;

		/* Copy the page to an aligned buffer */
		if (copy_to_user(buffer+count, recorded_buf.addr +
				 (HARMONY_BUF_SIZE*buf_to_read),
				 HARMONY_BUF_SIZE)) {
			count = -EFAULT;
			break;
		}
		
		harmony.nb_filled_record--;
		harmony.first_filled_record++;
		harmony.first_filled_record %= MAX_BUFS;
				
		count += HARMONY_BUF_SIZE;
	}
	return count;
}




/*
 * Here is the place where we try to recognize file format.
 * Sun/NeXT .au files begin with the string .snd
 * At offset 12 is specified the encoding.
 * At offset 16 is specified speed rate
 * At Offset 20 is specified the numbers of voices
 */

#define four_bytes_to_u32(start) (file_header[start] << 24)|\
                                  (file_header[start+1] << 16)|\
                                  (file_header[start+2] << 8)|\
                                  (file_header[start+3]);

#define test_rate(tested,real_value,harmony_value) if ((tested)<=(real_value))\
                                                    

static int harmony_format_auto_detect(const char *buffer, int block_size)
{
	u8 file_header[24];
	u32 start_string;
	int ret = 0;
	
	if (block_size>24) {
		if (copy_from_user(file_header, buffer, sizeof(file_header)))
			ret = -EFAULT;
			
		start_string = four_bytes_to_u32(0);
		
		if ((file_header[4]==0) && (start_string==0x2E736E64)) {
			u32 format;
			u32 nb_voices;
			u32 speed;
			
			format = four_bytes_to_u32(12);
			nb_voices = four_bytes_to_u32(20);
			speed = four_bytes_to_u32(16);
			
			switch (format) {
			case HARMONY_MAGIC_8B_ULAW:
				harmony.data_format = HARMONY_DF_8BIT_ULAW;
				break;
			case HARMONY_MAGIC_8B_ALAW:
				harmony.data_format = HARMONY_DF_8BIT_ALAW;
				break;
			case HARMONY_MAGIC_16B_LINEAR:
				harmony.data_format = HARMONY_DF_16BIT_LINEAR;
				break;
			default:
				harmony_set_control(HARMONY_DF_16BIT_LINEAR,
						HARMONY_SR_44KHZ, HARMONY_SS_STEREO);
				goto out;
			}
			switch (nb_voices) {
			case HARMONY_MAGIC_MONO:
				harmony.stereo_select = HARMONY_SS_MONO;
				break;
			case HARMONY_MAGIC_STEREO:
				harmony.stereo_select = HARMONY_SS_STEREO;
				break;
			default:
				harmony.stereo_select = HARMONY_SS_MONO;
				break;
			}
			harmony_set_rate(harmony_detect_rate(&speed));
			harmony.dac_rate = speed;
			goto out;
		}
	}
	harmony_set_control(HARMONY_DF_8BIT_ULAW, HARMONY_SR_8KHZ, HARMONY_SS_MONO);
out:
	return ret;
}
#undef four_bytes_to_u32


static ssize_t harmony_audio_write(struct file *file,
                                 const char *buffer,
                                 size_t size_count,
                                 loff_t *ppos)
{
	int total_count = (int) size_count;
	int count = 0;
	int frame_size;
	int buf_to_fill;
	int fresh_buffer;

	if (!harmony.format_initialized) {
		if (harmony_format_auto_detect(buffer, total_count))
			return -EFAULT;
	}
	
	while (count<total_count) {
		/* Wait until we're out of control mode */
		harmony_wait_CNTL();

		/* Figure out which buffer to fill in */
		if (harmony.nb_filled_play+2 >= MAX_BUFS && !harmony.play_offset) {
			harmony.blocked_playing = 1;
			interruptible_sleep_on(&harmony.wq_play);
			harmony.blocked_playing = 0;
		}
		if (harmony.nb_filled_play+2 >= MAX_BUFS && !harmony.play_offset)
			return -EBUSY;
		
		
		buf_to_fill = (harmony.first_filled_play+harmony.nb_filled_play); 
		if (harmony.play_offset) {
			buf_to_fill--;
			buf_to_fill += MAX_BUFS;
		}
		buf_to_fill %= MAX_BUFS;
		
		fresh_buffer = (harmony.play_offset == 0);
		
		/* Figure out the size of the frame */
		if ((total_count-count) >= HARMONY_BUF_SIZE - harmony.play_offset) {
			frame_size = HARMONY_BUF_SIZE - harmony.play_offset;
		} else {
			frame_size = total_count - count;
			/* Clear out the buffer, since there we'll only be 
			   overlaying part of the old buffer with the new one */
			harmony_silence(&played_buf, 
				HARMONY_BUF_SIZE*buf_to_fill+frame_size+harmony.play_offset,
				HARMONY_BUF_SIZE-frame_size-harmony.play_offset);
		}

		/* Copy the page to an aligned buffer */
		if (copy_from_user(played_buf.addr +(HARMONY_BUF_SIZE*buf_to_fill) + harmony.play_offset, 
				   buffer+count, frame_size))
			return -EFAULT;
		CHECK_WBACK_INV_OFFSET(played_buf, (HARMONY_BUF_SIZE*buf_to_fill + harmony.play_offset), 
				frame_size);
	
		if (fresh_buffer)
			harmony.nb_filled_play++;
		
		count += frame_size;
		harmony.play_offset += frame_size;
		harmony.play_offset %= HARMONY_BUF_SIZE;
		if (harmony.suspended_playing && (harmony.nb_filled_play>=4))
			harmony_enable_interrupts();
	}
	
	return count;
}

static unsigned int harmony_audio_poll(struct file *file,
                                     struct poll_table_struct *wait)
{
	unsigned int mask = 0;
	
	if (file->f_mode & FMODE_READ) {
		if (!harmony.suspended_recording)
			poll_wait(file, &harmony.wq_record, wait);
		if (harmony.nb_filled_record)
			mask |= POLLIN | POLLRDNORM;
	}

	if (file->f_mode & FMODE_WRITE) {
		if (!harmony.suspended_playing)
			poll_wait(file, &harmony.wq_play, wait);
		if (harmony.nb_filled_play)
			mask |= POLLOUT | POLLWRNORM;
	}

	return mask;
}

static int harmony_audio_ioctl(struct inode *inode,
                                struct file *file,
				unsigned int cmd,
                                unsigned long arg)
{
	int ival, new_format;
	int frag_size, frag_buf;
	struct audio_buf_info info;
	
	switch (cmd) {
	case OSS_GETVERSION:
		return put_user(SOUND_VERSION, (int *) arg);

	case SNDCTL_DSP_GETCAPS:
		ival = DSP_CAP_DUPLEX;
		return put_user(ival, (int *) arg);

	case SNDCTL_DSP_GETFMTS:
		ival = (AFMT_S16_BE | AFMT_MU_LAW | AFMT_A_LAW ); 
		return put_user(ival, (int *) arg);
	
	case SNDCTL_DSP_SETFMT:
		if (get_user(ival, (int *) arg)) 
			return -EFAULT;
		if (ival != AFMT_QUERY) {
			switch (ival) {
			case AFMT_MU_LAW:	new_format = HARMONY_DF_8BIT_ULAW; break;
			case AFMT_A_LAW:	new_format = HARMONY_DF_8BIT_ALAW; break;
			case AFMT_S16_BE:	new_format = HARMONY_DF_16BIT_LINEAR; break;
			default: {
				DPRINTK(KERN_WARNING PFX 
					"unsupported sound format 0x%04x requested.\n",
					ival);
				ival = AFMT_S16_BE;
				return put_user(ival, (int *) arg);
			}
			}
			harmony_set_format(new_format);
			return 0;
		} else {
			switch (harmony.data_format) {
			case HARMONY_DF_8BIT_ULAW:	ival = AFMT_MU_LAW; break;
			case HARMONY_DF_8BIT_ALAW:	ival = AFMT_A_LAW;  break;
			case HARMONY_DF_16BIT_LINEAR:	ival = AFMT_U16_BE; break;
			default: ival = 0;
			}
			return put_user(ival, (int *) arg);
		}

	case SOUND_PCM_READ_RATE:
		ival = harmony.dac_rate;
		return put_user(ival, (int *) arg);

	case SNDCTL_DSP_SPEED:
		if (get_user(ival, (int *) arg))
			return -EFAULT;
		harmony_set_rate(harmony_detect_rate(&ival));
		harmony.dac_rate = ival;
		return put_user(ival, (int*) arg);

	case SNDCTL_DSP_STEREO:
		if (get_user(ival, (int *) arg))
			return -EFAULT;
		if (ival != 0 && ival != 1)
			return -EINVAL;
		harmony_set_stereo(ival);
 		return 0;
 
 	case SNDCTL_DSP_CHANNELS:
 		if (get_user(ival, (int *) arg))
 			return -EFAULT;
 		if (ival != 1 && ival != 2) {
 			ival = harmony.stereo_select == HARMONY_SS_MONO ? 1 : 2;
 			return put_user(ival, (int *) arg);
 		}
 		harmony_set_stereo(ival-1);
 		return 0;

	case SNDCTL_DSP_GETBLKSIZE:
		ival = HARMONY_BUF_SIZE;
		return put_user(ival, (int *) arg);
		
        case SNDCTL_DSP_NONBLOCK:
                file->f_flags |= O_NONBLOCK;
                return 0;

        case SNDCTL_DSP_RESET:
		if (!harmony.suspended_recording) {
			/* TODO: stop_recording() */
		}
		return 0;

	case SNDCTL_DSP_SETFRAGMENT:
		if (get_user(ival, (int *)arg))
			return -EFAULT;
		frag_size = ival & 0xffff;
		frag_buf = (ival>>16) & 0xffff;
		/* TODO: We use hardcoded fragment sizes and numbers for now */
		frag_size = 12;  /* 4096 == 2^12 */
		frag_buf  = MAX_BUFS;
		ival = (frag_buf << 16) + frag_size;
		return put_user(ival, (int *) arg);
		
	case SNDCTL_DSP_GETOSPACE:
		if (!(file->f_mode & FMODE_WRITE))
			return -EINVAL;
		info.fragstotal = MAX_BUFS;
                info.fragments = MAX_BUFS - harmony.nb_filled_play;
		info.fragsize = HARMONY_BUF_SIZE;
                info.bytes = info.fragments * info.fragsize;
		return copy_to_user((void *)arg, &info, sizeof(info)) ? -EFAULT : 0;

	case SNDCTL_DSP_GETISPACE:
		if (!(file->f_mode & FMODE_READ))
			return -EINVAL;
		info.fragstotal = MAX_BUFS;
                info.fragments = /*MAX_BUFS-*/ harmony.nb_filled_record;
		info.fragsize = HARMONY_BUF_SIZE;
                info.bytes = info.fragments * info.fragsize;
		return copy_to_user((void *)arg, &info, sizeof(info)) ? -EFAULT : 0;
	
	case SNDCTL_DSP_SYNC:
		return 0;
	}
	
	return -EINVAL;
}


/*
 * harmony_interrupt()
 *
 * harmony interruption service routine
 * 
 */

static irqreturn_t harmony_interrupt(int irq, void *dev, struct pt_regs *regs)
{
	u32 dstatus;
	struct harmony_hpa *hpa;

	/* Setup the hpa */
	hpa = ((struct harmony_dev *)dev)->hpa;
	harmony_wait_CNTL();

	/* Read dstatus and pcuradd (the current address) */
	dstatus = gsc_readl(&hpa->dstatus);
	
	/* Turn off interrupts */
	harmony_disable_interrupts();
	
	/* Check if this is a request to get the next play buffer */
	if (dstatus & DSTATUS_PN) {
		if (!harmony.nb_filled_play) {
			harmony.suspended_playing = 1;
			gsc_writel((unsigned long)silent.dma_handle, &hpa->pnxtadd);
						
			if (!harmony.suspended_recording)
				harmony_enable_interrupts();
		} else {
			harmony.suspended_playing = 0;
			gsc_writel((unsigned long)played_buf.dma_handle + 
					(HARMONY_BUF_SIZE*harmony.first_filled_play),
					&hpa->pnxtadd);
			harmony.first_filled_play++;
			harmony.first_filled_play %= MAX_BUFS;
			harmony.nb_filled_play--;
			
		       	harmony_enable_interrupts();
		}
		
		if (harmony.blocked_playing)
			wake_up_interruptible(&harmony.wq_play);
	}
	
	/* Check if we're being asked to fill in a recording buffer */
	if (dstatus & DSTATUS_RN) {
		if((harmony.nb_filled_record+2>=MAX_BUFS) || harmony.suspended_recording)
		{
			harmony.nb_filled_record = 0;
			harmony.first_filled_record = 0;
			harmony.suspended_recording = 1;
			gsc_writel((unsigned long)graveyard.dma_handle, &hpa->rnxtadd);
			if (!harmony.suspended_playing)
				harmony_enable_interrupts();
		} else {
			int buf_to_fill;
			buf_to_fill = (harmony.first_filled_record+harmony.nb_filled_record) % MAX_BUFS;
			CHECK_WBACK_INV_OFFSET(recorded_buf, HARMONY_BUF_SIZE*buf_to_fill, HARMONY_BUF_SIZE);
			gsc_writel((unsigned long)recorded_buf.dma_handle +
					HARMONY_BUF_SIZE*buf_to_fill,
					&hpa->rnxtadd);
			harmony.nb_filled_record++;
			harmony_enable_interrupts();
		}

		if (harmony.blocked_recording && harmony.nb_filled_record>3)
			wake_up_interruptible(&harmony.wq_record);
	}
	return IRQ_HANDLED;
}

/*
 * Sound playing functions
 */

static struct file_operations harmony_audio_fops = {
	.owner		= THIS_MODULE,
	.llseek		= no_llseek,
	.read		= harmony_audio_read,
	.write		= harmony_audio_write,
	.poll		= harmony_audio_poll,
	.ioctl		= harmony_audio_ioctl,
	.open		= harmony_audio_open,
	.release	= harmony_audio_release,
};

static int harmony_audio_init(void)
{
	/* Request that IRQ */
	if (request_irq(harmony.dev->irq, harmony_interrupt, 0 ,"harmony", &harmony)) {
		printk(KERN_ERR PFX "Error requesting irq %d.\n", harmony.dev->irq);
		return -EFAULT;
	}

   	harmony.dsp_unit = register_sound_dsp(&harmony_audio_fops, -1);
	if (harmony.dsp_unit < 0) {
		printk(KERN_ERR PFX "Error registering dsp\n");
		free_irq(harmony.dev->irq, &harmony);
		return -EFAULT;
	}
	
	/* Clear the buffers so you don't end up with crap in the buffers. */ 
	harmony_silence(&played_buf, 0, HARMONY_BUF_SIZE*MAX_BUFS);

	/* Make sure this makes it to cache */
	CHECK_WBACK_INV_OFFSET(played_buf, 0, HARMONY_BUF_SIZE*MAX_BUFS);

	/* Clear out the silent buffer and flush to cache */
	harmony_silence(&silent, 0, HARMONY_BUF_SIZE);
	CHECK_WBACK_INV_OFFSET(silent, 0, HARMONY_BUF_SIZE);
	
	harmony.audio_open = 0;
	
	return 0;
}


/*
 * mixer functions 
 */

static void harmony_mixer_set_gain(void)
{
	harmony_wait_CNTL();
	gsc_writel(harmony.current_gain, &harmony.hpa->gainctl);
}

/* 
 *  Read gain of selected channel.
 *  The OSS rate is from 0 (silent) to 100 -> need some conversions
 *
 *  The harmony gain are attenuation for output and monitor gain.
 *                   is amplifaction for input gain
 */
#define to_harmony_level(level,max) ((level)*max/100)
#define to_oss_level(level,max) ((level)*100/max)

static int harmony_mixer_get_level(int channel)
{
	int left_level;
	int right_level;

	switch (channel) {
		case SOUND_MIXER_VOLUME:
			left_level  = (harmony.current_gain & GAIN_LO_MASK) >> GAIN_LO_SHIFT;
			right_level = (harmony.current_gain & GAIN_RO_MASK) >> GAIN_RO_SHIFT;
			left_level  = to_oss_level(MAX_OUTPUT_LEVEL - left_level, MAX_OUTPUT_LEVEL);
			right_level = to_oss_level(MAX_OUTPUT_LEVEL - right_level, MAX_OUTPUT_LEVEL);
			return (right_level << 8)+left_level;
			
		case SOUND_MIXER_IGAIN:
			left_level = (harmony.current_gain & GAIN_LI_MASK) >> GAIN_LI_SHIFT;
			right_level= (harmony.current_gain & GAIN_RI_MASK) >> GAIN_RI_SHIFT;
			left_level = to_oss_level(left_level, MAX_INPUT_LEVEL);
			right_level= to_oss_level(right_level, MAX_INPUT_LEVEL);
			return (right_level << 8)+left_level;
			
		case SOUND_MIXER_MONITOR:
			left_level = (harmony.current_gain & GAIN_MA_MASK) >> GAIN_MA_SHIFT;
			left_level = to_oss_level(MAX_MONITOR_LEVEL-left_level, MAX_MONITOR_LEVEL);
			return (left_level << 8)+left_level;
	}
	return -EINVAL;
}



/*
 * Some conversions for the same reasons.
 * We give back the new real value(s) due to
 * the rescale.
 */

static int harmony_mixer_set_level(int channel, int value)
{
	int left_level;
	int right_level;
	int new_left_level;
	int new_right_level;

	right_level = (value & 0x0000ff00) >> 8;
	left_level = value & 0x000000ff;
	if (right_level > 100) right_level = 100;
	if (left_level > 100) left_level = 100;
  
	switch (channel) {
		case SOUND_MIXER_VOLUME:
			right_level = to_harmony_level(100-right_level, MAX_OUTPUT_LEVEL);
			left_level  = to_harmony_level(100-left_level, MAX_OUTPUT_LEVEL);
			new_right_level = to_oss_level(MAX_OUTPUT_LEVEL - right_level, MAX_OUTPUT_LEVEL);
			new_left_level  = to_oss_level(MAX_OUTPUT_LEVEL - left_level, MAX_OUTPUT_LEVEL);
			harmony.current_gain = (harmony.current_gain & ~(GAIN_LO_MASK | GAIN_RO_MASK)) 
					| (left_level << GAIN_LO_SHIFT) | (right_level << GAIN_RO_SHIFT);
			harmony_mixer_set_gain();
			return (new_right_level << 8) + new_left_level;
			
		case SOUND_MIXER_IGAIN:
			right_level = to_harmony_level(right_level, MAX_INPUT_LEVEL);
			left_level  = to_harmony_level(left_level, MAX_INPUT_LEVEL);
			new_right_level = to_oss_level(right_level, MAX_INPUT_LEVEL);
			new_left_level  = to_oss_level(left_level, MAX_INPUT_LEVEL);
			harmony.current_gain = (harmony.current_gain & ~(GAIN_LI_MASK | GAIN_RI_MASK))
					| (left_level << GAIN_LI_SHIFT) | (right_level << GAIN_RI_SHIFT);
			harmony_mixer_set_gain();
			return (new_right_level << 8) + new_left_level;
	
		case SOUND_MIXER_MONITOR:
			left_level = to_harmony_level(100-left_level, MAX_MONITOR_LEVEL);
			new_left_level = to_oss_level(MAX_MONITOR_LEVEL-left_level, MAX_MONITOR_LEVEL);
			harmony.current_gain = (harmony.current_gain & ~GAIN_MA_MASK) | (left_level << GAIN_MA_SHIFT);
			harmony_mixer_set_gain();
			return (new_left_level << 8) + new_left_level;
	}

	return -EINVAL;
}

#undef to_harmony_level
#undef to_oss_level

/* 
 * Return the selected input device (mic or line)
 */

static int harmony_mixer_get_recmask(void) 
{
	int current_input_line;
	
	current_input_line = (harmony.current_gain & GAIN_IS_MASK) 
				    >> GAIN_IS_SHIFT;
	if (current_input_line) 
		return SOUND_MASK_MIC;

	return SOUND_MASK_LINE;
}

/*
 * Set the input (only one at time, arbitrary priority to line in)
 */

static int harmony_mixer_set_recmask(int recmask)
{
	int new_input_line;
	int new_input_mask;
	int current_input_line;
	
	current_input_line = (harmony.current_gain & GAIN_IS_MASK)
				    >> GAIN_IS_SHIFT;
	if ((current_input_line && ((recmask & SOUND_MASK_LINE) || !(recmask & SOUND_MASK_MIC))) ||
		(!current_input_line && ((recmask & SOUND_MASK_LINE) && !(recmask & SOUND_MASK_MIC)))) {
		new_input_line = 0;
		new_input_mask = SOUND_MASK_LINE;
	} else {
		new_input_line = 1;
		new_input_mask = SOUND_MASK_MIC;
	}
	harmony.current_gain = ((harmony.current_gain & ~GAIN_IS_MASK) | 
				(new_input_line << GAIN_IS_SHIFT ));
	harmony_mixer_set_gain();
	return new_input_mask;
}


/* 
 * give the active outlines
 */

static int harmony_mixer_get_outmask(void)
{
	int outmask = 0;
	
	if (harmony.current_gain & GAIN_SE_MASK) outmask |= MASK_INTERNAL;
	if (harmony.current_gain & GAIN_LE_MASK) outmask |= MASK_LINEOUT;
	if (harmony.current_gain & GAIN_HE_MASK) outmask |= MASK_HEADPHONES;
	
	return outmask;
}


static int harmony_mixer_set_outmask(int outmask)
{
	if (outmask & MASK_INTERNAL) 
		harmony.current_gain |= GAIN_SE_MASK;
	else 
		harmony.current_gain &= ~GAIN_SE_MASK;
	
	if (outmask & MASK_LINEOUT) 
		harmony.current_gain |= GAIN_LE_MASK;
	else 
		harmony.current_gain &= ~GAIN_LE_MASK;
	
	if (outmask & MASK_HEADPHONES) 
		harmony.current_gain |= GAIN_HE_MASK; 
	else 
		harmony.current_gain &= ~GAIN_HE_MASK;
	
	harmony_mixer_set_gain();

	return (outmask & (MASK_INTERNAL | MASK_LINEOUT | MASK_HEADPHONES));
}

/*
 * This code is inspired from sb_mixer.c
 */

static int harmony_mixer_ioctl(struct inode * inode, struct file * file,
		unsigned int cmd, unsigned long arg)
{
	int val;
	int ret;

	if (cmd == SOUND_MIXER_INFO) {
		mixer_info info;
		memset(&info, 0, sizeof(info));
                strncpy(info.id, "harmony", sizeof(info.id)-1);
                strncpy(info.name, "Harmony audio", sizeof(info.name)-1);
                info.modify_counter = 1; /* ? */
                if (copy_to_user((void *)arg, &info, sizeof(info)))
                        return -EFAULT;
		return 0;
	}
	
	if (cmd == OSS_GETVERSION)
		return put_user(SOUND_VERSION, (int *)arg);

	/* read */
	val = 0;
	if (_SIOC_DIR(cmd) & _SIOC_WRITE)
		if (get_user(val, (int *)arg))
			return -EFAULT;

	switch (cmd) {
	case MIXER_READ(SOUND_MIXER_CAPS):
		ret = SOUND_CAP_EXCL_INPUT;
		break;
	case MIXER_READ(SOUND_MIXER_STEREODEVS):
		ret = SOUND_MASK_VOLUME | SOUND_MASK_IGAIN;
		break;
		
	case MIXER_READ(SOUND_MIXER_RECMASK):
		ret = SOUND_MASK_MIC | SOUND_MASK_LINE;
		break;
	case MIXER_READ(SOUND_MIXER_DEVMASK):
		ret = SOUND_MASK_VOLUME | SOUND_MASK_IGAIN |
			SOUND_MASK_MONITOR;
		break;
	case MIXER_READ(SOUND_MIXER_OUTMASK):
		ret = MASK_INTERNAL | MASK_LINEOUT |
			MASK_HEADPHONES;
		break;
		
	case MIXER_WRITE(SOUND_MIXER_RECSRC):
		ret = harmony_mixer_set_recmask(val);
		break;
	case MIXER_READ(SOUND_MIXER_RECSRC):
		ret = harmony_mixer_get_recmask();
		break;
	      
	case MIXER_WRITE(SOUND_MIXER_OUTSRC):
		ret = harmony_mixer_set_outmask(val);
		break;
	case MIXER_READ(SOUND_MIXER_OUTSRC):
		ret = harmony_mixer_get_outmask();
		break;
	
	case MIXER_WRITE(SOUND_MIXER_VOLUME):
	case MIXER_WRITE(SOUND_MIXER_IGAIN):
	case MIXER_WRITE(SOUND_MIXER_MONITOR):
		ret = harmony_mixer_set_level(cmd & 0xff, val);
		break;

	case MIXER_READ(SOUND_MIXER_VOLUME):
	case MIXER_READ(SOUND_MIXER_IGAIN):
	case MIXER_READ(SOUND_MIXER_MONITOR):
		ret = harmony_mixer_get_level(cmd & 0xff);
		break;

	default:
		return -EINVAL;
	}

	if (put_user(ret, (int *)arg))
		return -EFAULT;
	return 0;
}


static int harmony_mixer_open(struct inode *inode, struct file *file)
{
	if (harmony.mixer_open) 
		return -EBUSY;
	harmony.mixer_open = 1;
	return 0;
}

static int harmony_mixer_release(struct inode *inode, struct file *file)
{
	if (!harmony.mixer_open) 
		return -EBUSY;
	harmony.mixer_open = 0;
	return 0;
}

static struct file_operations harmony_mixer_fops = {
	.owner		= THIS_MODULE,
	.llseek		= no_llseek,
	.open		= harmony_mixer_open,
	.release	= harmony_mixer_release,
	.ioctl		= harmony_mixer_ioctl,
};


/*
 * Mute all the output and reset Harmony.
 */

static void __init harmony_mixer_reset(void)
{
	harmony.current_gain = GAIN_TOTAL_SILENCE;
	harmony_mixer_set_gain();
	harmony_wait_CNTL();
	gsc_writel(1, &harmony.hpa->reset);
	mdelay(50);		/* wait 50 ms */
	gsc_writel(0, &harmony.hpa->reset);
	harmony.current_gain = GAIN_DEFAULT;
	harmony_mixer_set_gain();
}

static int __init harmony_mixer_init(void)
{
	/* Register the device file operations */
	harmony.mixer_unit = register_sound_mixer(&harmony_mixer_fops, -1);
	if (harmony.mixer_unit < 0) {
		printk(KERN_WARNING PFX "Error Registering Mixer Driver\n");
		return -EFAULT;
	}
  
	harmony_mixer_reset();
	harmony.mixer_open = 0;
	
	return 0;
}



/* 
 * This is the callback that's called by the inventory hardware code 
 * if it finds a match to the registered driver. 
 */
static int __devinit
harmony_driver_probe(struct parisc_device *dev)
{
	u8	id;
	u8	rev;
	u32	cntl;
	int	ret;

	if (harmony.hpa) {
		/* We only support one Harmony at this time */
		printk(KERN_ERR PFX "driver already registered\n");
		return -EBUSY;
	}

	if (!dev->irq) {
		printk(KERN_ERR PFX "no irq found\n");
		return -ENODEV;
	}

	/* Set the HPA of harmony */
	harmony.hpa = (struct harmony_hpa *)dev->hpa.start;
	harmony.dev = dev;

	/* Grab the ID and revision from the device */
	id = gsc_readb(&harmony.hpa->id);
	if ((id | 1) != 0x15) {
		printk(KERN_WARNING PFX "wrong harmony id 0x%02x\n", id);
		return -EBUSY;
	}
	cntl = gsc_readl(&harmony.hpa->cntl);
	rev = (cntl>>20) & 0xff;

	printk(KERN_INFO "Lasi Harmony Audio driver " HARMONY_VERSION ", "
			"h/w id %i, rev. %i at 0x%lx, IRQ %i\n",
			id, rev, dev->hpa.start, harmony.dev->irq);
	
	/* Make sure the control bit isn't set, although I don't think it 
	   ever is. */
	if (cntl & CNTL_C) {
		printk(KERN_WARNING PFX "CNTL busy\n");
		harmony.hpa = 0;
		return -EBUSY;
	}

	/* Initialize the memory buffers */
	if (harmony_alloc_buffer(&played_buf, MAX_BUFS) || 
	    harmony_alloc_buffer(&recorded_buf, MAX_BUFS) ||
	    harmony_alloc_buffer(&graveyard, 1) ||
	    harmony_alloc_buffer(&silent, 1)) {
		ret = -EBUSY;
		goto out_err;
	}

	/* Initialize /dev/mixer and /dev/audio  */
	if ((ret=harmony_mixer_init())) 
		goto out_err;
	if ((ret=harmony_audio_init())) 
		goto out_err;

	return 0;

out_err:
	harmony.hpa = 0;
	harmony_free_buffer(&played_buf);
	harmony_free_buffer(&recorded_buf);
	harmony_free_buffer(&graveyard);
	harmony_free_buffer(&silent);
	return ret;
}


static struct parisc_device_id harmony_tbl[] = {
 /* { HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0007A }, Bushmaster/Flounder */
 { HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0007B }, /* 712/715 Audio */
 { HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0007E }, /* Pace Audio */
 { HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0007F }, /* Outfield / Coral II */
 { 0, }
};

MODULE_DEVICE_TABLE(parisc, harmony_tbl);

static struct parisc_driver harmony_driver = {
	.name		= "Lasi Harmony",
	.id_table	= harmony_tbl,
	.probe		= harmony_driver_probe,
};

static int __init init_harmony(void)
{
	return register_parisc_driver(&harmony_driver);
}

static void __exit cleanup_harmony(void)
{
	free_irq(harmony.dev->irq, &harmony);
	unregister_sound_mixer(harmony.mixer_unit);
	unregister_sound_dsp(harmony.dsp_unit);
	harmony_free_buffer(&played_buf);
	harmony_free_buffer(&recorded_buf);
	harmony_free_buffer(&graveyard);
	harmony_free_buffer(&silent);
	unregister_parisc_driver(&harmony_driver);
}


MODULE_AUTHOR("Alex DeVries <alex@onefishtwo.ca>");
MODULE_DESCRIPTION("Harmony sound driver");
MODULE_LICENSE("GPL");

module_init(init_harmony);
module_exit(cleanup_harmony);