summaryrefslogtreecommitdiffstats
path: root/sound/drivers/mts64.c
blob: fd4d18df84d3666c62482c07da0a6cf694f61e47 (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
/*     
 *   ALSA Driver for Ego Systems Inc. (ESI) Miditerminal 4140
 *   Copyright (c) 2006 by Matthias König <mk@phasorlab.de>
 *
 *   This program 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; either version 2 of the License, or 
 *   (at your option) any later version. 
 *
 *   This program is distributed in the hope that it will be useful, 
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of 
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 */

#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/parport.h>
#include <linux/spinlock.h>
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <sound/core.h>
#include <sound/initval.h>
#include <sound/rawmidi.h>
#include <sound/control.h>

#define CARD_NAME "Miditerminal 4140"
#define DRIVER_NAME "MTS64"
#define PLATFORM_DRIVER "snd_mts64"

static int index[SNDRV_CARDS]  = SNDRV_DEFAULT_IDX;
static char *id[SNDRV_CARDS]   = SNDRV_DEFAULT_STR;
static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;

static struct platform_device *platform_devices[SNDRV_CARDS]; 
static int device_count;

module_param_array(index, int, NULL, S_IRUGO);
MODULE_PARM_DESC(index, "Index value for " CARD_NAME " soundcard.");
module_param_array(id, charp, NULL, S_IRUGO);
MODULE_PARM_DESC(id, "ID string for " CARD_NAME " soundcard.");
module_param_array(enable, bool, NULL, S_IRUGO);
MODULE_PARM_DESC(enable, "Enable " CARD_NAME " soundcard.");

MODULE_AUTHOR("Matthias Koenig <mk@phasorlab.de>");
MODULE_DESCRIPTION("ESI Miditerminal 4140");
MODULE_LICENSE("GPL");
MODULE_SUPPORTED_DEVICE("{{ESI,Miditerminal 4140}}");

/*********************************************************************
 * Chip specific
 *********************************************************************/
#define MTS64_NUM_INPUT_PORTS 5
#define MTS64_NUM_OUTPUT_PORTS 4
#define MTS64_SMPTE_SUBSTREAM 4

struct mts64 {
	spinlock_t lock;
	struct snd_card *card;
	struct snd_rawmidi *rmidi;
	struct pardevice *pardev;
	int open_count;
	int current_midi_output_port;
	int current_midi_input_port;
	u8 mode[MTS64_NUM_INPUT_PORTS];
	struct snd_rawmidi_substream *midi_input_substream[MTS64_NUM_INPUT_PORTS];
	int smpte_switch;
	u8 time[4]; /* [0]=hh, [1]=mm, [2]=ss, [3]=ff */
	u8 fps;
};

static int snd_mts64_free(struct mts64 *mts)
{
	kfree(mts);
	return 0;
}

static int snd_mts64_create(struct snd_card *card,
			    struct pardevice *pardev,
			    struct mts64 **rchip)
{
	struct mts64 *mts;

	*rchip = NULL;

	mts = kzalloc(sizeof(struct mts64), GFP_KERNEL);
	if (mts == NULL) 
		return -ENOMEM;

	/* Init chip specific data */
	spin_lock_init(&mts->lock);
	mts->card = card;
	mts->pardev = pardev;
	mts->current_midi_output_port = -1;
	mts->current_midi_input_port = -1;

	*rchip = mts;

	return 0;
}

/*********************************************************************
 * HW register related constants
 *********************************************************************/

/* Status Bits */
#define MTS64_STAT_BSY             0x80
#define MTS64_STAT_BIT_SET         0x20  /* readout process, bit is set */
#define MTS64_STAT_PORT            0x10  /* read byte is a port number */

/* Control Bits */
#define MTS64_CTL_READOUT          0x08  /* enable readout */
#define MTS64_CTL_WRITE_CMD        0x06  
#define MTS64_CTL_WRITE_DATA       0x02  
#define MTS64_CTL_STROBE           0x01  

/* Command */
#define MTS64_CMD_RESET            0xfe
#define MTS64_CMD_PROBE            0x8f  /* Used in probing procedure */
#define MTS64_CMD_SMPTE_SET_TIME   0xe8
#define MTS64_CMD_SMPTE_SET_FPS    0xee
#define MTS64_CMD_SMPTE_STOP       0xef
#define MTS64_CMD_SMPTE_FPS_24     0xe3
#define MTS64_CMD_SMPTE_FPS_25     0xe2
#define MTS64_CMD_SMPTE_FPS_2997   0xe4 
#define MTS64_CMD_SMPTE_FPS_30D    0xe1
#define MTS64_CMD_SMPTE_FPS_30     0xe0
#define MTS64_CMD_COM_OPEN         0xf8  /* setting the communication mode */
#define MTS64_CMD_COM_CLOSE1       0xff  /* clearing communication mode */
#define MTS64_CMD_COM_CLOSE2       0xf5

/*********************************************************************
 * Hardware specific functions
 *********************************************************************/
static void mts64_enable_readout(struct parport *p);
static void mts64_disable_readout(struct parport *p);
static int mts64_device_ready(struct parport *p);
static int mts64_device_init(struct parport *p);
static int mts64_device_open(struct mts64 *mts);
static int mts64_device_close(struct mts64 *mts);
static u8 mts64_map_midi_input(u8 c);
static int mts64_probe(struct parport *p);
static u16 mts64_read(struct parport *p);
static u8 mts64_read_char(struct parport *p);
static void mts64_smpte_start(struct parport *p,
			      u8 hours, u8 minutes,
			      u8 seconds, u8 frames,
			      u8 idx);
static void mts64_smpte_stop(struct parport *p);
static void mts64_write_command(struct parport *p, u8 c);
static void mts64_write_data(struct parport *p, u8 c);
static void mts64_write_midi(struct mts64 *mts, u8 c, int midiport);


/*  Enables the readout procedure
 *
 *  Before we can read a midi byte from the device, we have to set
 *  bit 3 of control port.
 */
static void mts64_enable_readout(struct parport *p)
{
	u8 c;

	c = parport_read_control(p);
	c |= MTS64_CTL_READOUT;
	parport_write_control(p, c); 
}

/*  Disables readout 
 *
 *  Readout is disabled by clearing bit 3 of control
 */
static void mts64_disable_readout(struct parport *p)
{
	u8 c;

	c = parport_read_control(p);
	c &= ~MTS64_CTL_READOUT;
	parport_write_control(p, c);
}

/*  waits for device ready
 *
 *  Checks if BUSY (Bit 7 of status) is clear
 *  1 device ready
 *  0 failure
 */
static int mts64_device_ready(struct parport *p)
{
	int i;
	u8 c;

	for (i = 0; i < 0xffff; ++i) {
		c = parport_read_status(p);
		c &= MTS64_STAT_BSY;
		if (c != 0) 
			return 1;
	} 

	return 0;
}

/*  Init device (LED blinking startup magic)
 *
 *  Returns:
 *  0 init ok
 *  -EIO failure
 */
static int mts64_device_init(struct parport *p)
{
	int i;

	mts64_write_command(p, MTS64_CMD_RESET);

	for (i = 0; i < 64; ++i) {
		msleep(100);

		if (mts64_probe(p) == 0) {
			/* success */
			mts64_disable_readout(p);
			return 0;
		}
	}
	mts64_disable_readout(p);

	return -EIO;
}

/* 
 *  Opens the device (set communication mode)
 */
static int mts64_device_open(struct mts64 *mts)
{
	int i;
	struct parport *p = mts->pardev->port;

	for (i = 0; i < 5; ++i)
		mts64_write_command(p, MTS64_CMD_COM_OPEN);

	return 0;
}

/*  
 *  Close device (clear communication mode)
 */
static int mts64_device_close(struct mts64 *mts)
{
	int i;
	struct parport *p = mts->pardev->port;

	for (i = 0; i < 5; ++i) {
		mts64_write_command(p, MTS64_CMD_COM_CLOSE1);
		mts64_write_command(p, MTS64_CMD_COM_CLOSE2);
	}

	return 0;
}

/*  map hardware port to substream number
 * 
 *  When reading a byte from the device, the device tells us
 *  on what port the byte is. This HW port has to be mapped to
 *  the midiport (substream number).
 *  substream 0-3 are Midiports 1-4
 *  substream 4 is SMPTE Timecode
 *  The mapping is done by the table:
 *  HW | 0 | 1 | 2 | 3 | 4 
 *  SW | 0 | 1 | 4 | 2 | 3
 */
static u8 mts64_map_midi_input(u8 c)
{
	static u8 map[] = { 0, 1, 4, 2, 3 };

	return map[c];
}


/*  Probe parport for device
 *
 *  Do we have a Miditerminal 4140 on parport? 
 *  Returns:
 *  0       device found
 *  -ENODEV no device
 */
static int mts64_probe(struct parport *p)
{
	u8 c;

	mts64_smpte_stop(p);
	mts64_write_command(p, MTS64_CMD_PROBE);

	msleep(50);
	
	c = mts64_read(p);

	c &= 0x00ff;
	if (c != MTS64_CMD_PROBE) 
		return -ENODEV;
	else 
		return 0;

}

/*  Read byte incl. status from device
 *
 *  Returns:
 *  data in lower 8 bits and status in upper 8 bits
 */
static u16 mts64_read(struct parport *p)
{
	u8 data, status;

	mts64_device_ready(p);
	mts64_enable_readout(p);
	status = parport_read_status(p);
	data = mts64_read_char(p);
	mts64_disable_readout(p);

	return (status << 8) | data;
}

/*  Read a byte from device
 *
 *  Note, that readout mode has to be enabled.
 *  readout procedure is as follows: 
 *  - Write number of the Bit to read to DATA
 *  - Read STATUS
 *  - Bit 5 of STATUS indicates if Bit is set
 *
 *  Returns:
 *  Byte read from device
 */
static u8 mts64_read_char(struct parport *p)
{
	u8 c = 0;
	u8 status;
	u8 i;

	for (i = 0; i < 8; ++i) {
		parport_write_data(p, i);
		c >>= 1;
		status = parport_read_status(p);
		if (status & MTS64_STAT_BIT_SET) 
			c |= 0x80;
	}
	
	return c;
}

/*  Starts SMPTE Timecode generation
 *
 *  The device creates SMPTE Timecode by hardware.
 *  0 24 fps
 *  1 25 fps
 *  2 29.97 fps
 *  3 30 fps (Drop-frame)
 *  4 30 fps
 */
static void mts64_smpte_start(struct parport *p,
			      u8 hours, u8 minutes,
			      u8 seconds, u8 frames,
			      u8 idx)
{
	static u8 fps[5] = { MTS64_CMD_SMPTE_FPS_24, 
			     MTS64_CMD_SMPTE_FPS_25,
			     MTS64_CMD_SMPTE_FPS_2997, 
			     MTS64_CMD_SMPTE_FPS_30D,
			     MTS64_CMD_SMPTE_FPS_30    };

	mts64_write_command(p, MTS64_CMD_SMPTE_SET_TIME);
	mts64_write_command(p, frames);
	mts64_write_command(p, seconds);
	mts64_write_command(p, minutes);
	mts64_write_command(p, hours);

	mts64_write_command(p, MTS64_CMD_SMPTE_SET_FPS);
	mts64_write_command(p, fps[idx]);
}

/*  Stops SMPTE Timecode generation
 */
static void mts64_smpte_stop(struct parport *p)
{
	mts64_write_command(p, MTS64_CMD_SMPTE_STOP);
}

/*  Write a command byte to device
 */
static void mts64_write_command(struct parport *p, u8 c)
{
	mts64_device_ready(p);

	parport_write_data(p, c);

	parport_write_control(p, MTS64_CTL_WRITE_CMD);
	parport_write_control(p, MTS64_CTL_WRITE_CMD | MTS64_CTL_STROBE);
	parport_write_control(p, MTS64_CTL_WRITE_CMD);
}

/*  Write a data byte to device 
 */
static void mts64_write_data(struct parport *p, u8 c)
{
	mts64_device_ready(p);

	parport_write_data(p, c);

	parport_write_control(p, MTS64_CTL_WRITE_DATA);
	parport_write_control(p, MTS64_CTL_WRITE_DATA | MTS64_CTL_STROBE);
	parport_write_control(p, MTS64_CTL_WRITE_DATA);
}

/*  Write a MIDI byte to midiport
 *
 *  midiport ranges from 0-3 and maps to Ports 1-4
 *  assumptions: communication mode is on
 */
static void mts64_write_midi(struct mts64 *mts, u8 c,
			     int midiport)
{
	struct parport *p = mts->pardev->port;

	/* check current midiport */
	if (mts->current_midi_output_port != midiport)
		mts64_write_command(p, midiport);

	/* write midi byte */
	mts64_write_data(p, c);
}

/*********************************************************************
 * Control elements
 *********************************************************************/

/* SMPTE Switch */
#define snd_mts64_ctl_smpte_switch_info		snd_ctl_boolean_mono_info

static int snd_mts64_ctl_smpte_switch_get(struct snd_kcontrol* kctl,
					  struct snd_ctl_elem_value *uctl)
{
	struct mts64 *mts = snd_kcontrol_chip(kctl);

	spin_lock_irq(&mts->lock);
	uctl->value.integer.value[0] = mts->smpte_switch;
	spin_unlock_irq(&mts->lock);

	return 0;
}

/* smpte_switch is not accessed from IRQ handler, so we just need
   to protect the HW access */
static int snd_mts64_ctl_smpte_switch_put(struct snd_kcontrol* kctl,
					  struct snd_ctl_elem_value *uctl)
{
	struct mts64 *mts = snd_kcontrol_chip(kctl);
	int changed = 0;
	int val = !!uctl->value.integer.value[0];

	spin_lock_irq(&mts->lock);
	if (mts->smpte_switch == val)
		goto __out;

	changed = 1;
	mts->smpte_switch = val;
	if (mts->smpte_switch) {
		mts64_smpte_start(mts->pardev->port,
				  mts->time[0], mts->time[1],
				  mts->time[2], mts->time[3],
				  mts->fps);
	} else {
		mts64_smpte_stop(mts->pardev->port);
	}
__out:
	spin_unlock_irq(&mts->lock);
	return changed;
}

static struct snd_kcontrol_new mts64_ctl_smpte_switch = {
	.iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
	.name  = "SMPTE Playback Switch",
	.index = 0,
	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
	.private_value = 0,
	.info = snd_mts64_ctl_smpte_switch_info,
	.get  = snd_mts64_ctl_smpte_switch_get,
	.put  = snd_mts64_ctl_smpte_switch_put
};

/* Time */
static int snd_mts64_ctl_smpte_time_h_info(struct snd_kcontrol *kctl,
					   struct snd_ctl_elem_info *uinfo)
{
	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
	uinfo->count = 1;
	uinfo->value.integer.min = 0;
	uinfo->value.integer.max = 23;
	return 0;
}

static int snd_mts64_ctl_smpte_time_f_info(struct snd_kcontrol *kctl,
					   struct snd_ctl_elem_info *uinfo)
{
	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
	uinfo->count = 1;
	uinfo->value.integer.min = 0;
	uinfo->value.integer.max = 99;
	return 0;
}

static int snd_mts64_ctl_smpte_time_info(struct snd_kcontrol *kctl,
					 struct snd_ctl_elem_info *uinfo)
{
	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
	uinfo->count = 1;
	uinfo->value.integer.min = 0;
	uinfo->value.integer.max = 59;
	return 0;
}

static int snd_mts64_ctl_smpte_time_get(struct snd_kcontrol *kctl,
					struct snd_ctl_elem_value *uctl)
{
	struct mts64 *mts = snd_kcontrol_chip(kctl);
	int idx = kctl->private_value;

	spin_lock_irq(&mts->lock);
	uctl->value.integer.value[0] = mts->time[idx];
	spin_unlock_irq(&mts->lock);

	return 0;
}

static int snd_mts64_ctl_smpte_time_put(struct snd_kcontrol *kctl,
					struct snd_ctl_elem_value *uctl)
{
	struct mts64 *mts = snd_kcontrol_chip(kctl);
	int idx = kctl->private_value;
	unsigned int time = uctl->value.integer.value[0] % 60;
	int changed = 0;

	spin_lock_irq(&mts->lock);
	if (mts->time[idx] != time) {
		changed = 1;
		mts->time[idx] = time;
	}
	spin_unlock_irq(&mts->lock);

	return changed;
}

static struct snd_kcontrol_new mts64_ctl_smpte_time_hours = {
	.iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
	.name  = "SMPTE Time Hours",
	.index = 0,
	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
	.private_value = 0,
	.info = snd_mts64_ctl_smpte_time_h_info,
	.get  = snd_mts64_ctl_smpte_time_get,
	.put  = snd_mts64_ctl_smpte_time_put
};

static struct snd_kcontrol_new mts64_ctl_smpte_time_minutes = {
	.iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
	.name  = "SMPTE Time Minutes",
	.index = 0,
	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
	.private_value = 1,
	.info = snd_mts64_ctl_smpte_time_info,
	.get  = snd_mts64_ctl_smpte_time_get,
	.put  = snd_mts64_ctl_smpte_time_put
};

static struct snd_kcontrol_new mts64_ctl_smpte_time_seconds = {
	.iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
	.name  = "SMPTE Time Seconds",
	.index = 0,
	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
	.private_value = 2,
	.info = snd_mts64_ctl_smpte_time_info,
	.get  = snd_mts64_ctl_smpte_time_get,
	.put  = snd_mts64_ctl_smpte_time_put
};

static struct snd_kcontrol_new mts64_ctl_smpte_time_frames = {
	.iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
	.name  = "SMPTE Time Frames",
	.index = 0,
	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
	.private_value = 3,
	.info = snd_mts64_ctl_smpte_time_f_info,
	.get  = snd_mts64_ctl_smpte_time_get,
	.put  = snd_mts64_ctl_smpte_time_put
};

/* FPS */
static int snd_mts64_ctl_smpte_fps_info(struct snd_kcontrol *kctl,
					struct snd_ctl_elem_info *uinfo)
{
	static const char * const texts[5] = {
		"24", "25", "29.97", "30D", "30"
	};

	return snd_ctl_enum_info(uinfo, 1, 5, texts);
}

static int snd_mts64_ctl_smpte_fps_get(struct snd_kcontrol *kctl,
				       struct snd_ctl_elem_value *uctl)
{
	struct mts64 *mts = snd_kcontrol_chip(kctl);

	spin_lock_irq(&mts->lock);
	uctl->value.enumerated.item[0] = mts->fps;
	spin_unlock_irq(&mts->lock);

	return 0;
}

static int snd_mts64_ctl_smpte_fps_put(struct snd_kcontrol *kctl,
				       struct snd_ctl_elem_value *uctl)
{
	struct mts64 *mts = snd_kcontrol_chip(kctl);
	int changed = 0;

	if (uctl->value.enumerated.item[0] >= 5)
		return -EINVAL;
	spin_lock_irq(&mts->lock);
	if (mts->fps != uctl->value.enumerated.item[0]) {
		changed = 1;
		mts->fps = uctl->value.enumerated.item[0];
	}
	spin_unlock_irq(&mts->lock);

	return changed;
}

static struct snd_kcontrol_new mts64_ctl_smpte_fps = {
	.iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
	.name  = "SMPTE Fps",
	.index = 0,
	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
	.private_value = 0,
	.info  = snd_mts64_ctl_smpte_fps_info,
	.get   = snd_mts64_ctl_smpte_fps_get,
	.put   = snd_mts64_ctl_smpte_fps_put
};


static int snd_mts64_ctl_create(struct snd_card *card,
				struct mts64 *mts)
{
	int err, i;
	static struct snd_kcontrol_new *control[] = {
		&mts64_ctl_smpte_switch,
		&mts64_ctl_smpte_time_hours,
		&mts64_ctl_smpte_time_minutes,
		&mts64_ctl_smpte_time_seconds,
		&mts64_ctl_smpte_time_frames,
		&mts64_ctl_smpte_fps,
	        NULL  };

	for (i = 0; control[i]; ++i) {
		err = snd_ctl_add(card, snd_ctl_new1(control[i], mts));
		if (err < 0) {
			snd_printd("Cannot create control: %s\n", 
				   control[i]->name);
			return err;
		}
	}

	return 0;
}

/*********************************************************************
 * Rawmidi
 *********************************************************************/
#define MTS64_MODE_INPUT_TRIGGERED 0x01

static int snd_mts64_rawmidi_open(struct snd_rawmidi_substream *substream)
{
	struct mts64 *mts = substream->rmidi->private_data;

	if (mts->open_count == 0) {
		/* We don't need a spinlock here, because this is just called 
		   if the device has not been opened before. 
		   So there aren't any IRQs from the device */
		mts64_device_open(mts);

		msleep(50);
	}
	++(mts->open_count);

	return 0;
}

static int snd_mts64_rawmidi_close(struct snd_rawmidi_substream *substream)
{
	struct mts64 *mts = substream->rmidi->private_data;
	unsigned long flags;

	--(mts->open_count);
	if (mts->open_count == 0) {
		/* We need the spinlock_irqsave here because we can still
		   have IRQs at this point */
		spin_lock_irqsave(&mts->lock, flags);
		mts64_device_close(mts);
		spin_unlock_irqrestore(&mts->lock, flags);

		msleep(500);

	} else if (mts->open_count < 0)
		mts->open_count = 0;

	return 0;
}

static void snd_mts64_rawmidi_output_trigger(struct snd_rawmidi_substream *substream,
					     int up)
{
	struct mts64 *mts = substream->rmidi->private_data;
	u8 data;
	unsigned long flags;

	spin_lock_irqsave(&mts->lock, flags);
	while (snd_rawmidi_transmit_peek(substream, &data, 1) == 1) {
		mts64_write_midi(mts, data, substream->number+1);
		snd_rawmidi_transmit_ack(substream, 1);
	}
	spin_unlock_irqrestore(&mts->lock, flags);
}

static void snd_mts64_rawmidi_input_trigger(struct snd_rawmidi_substream *substream,
					    int up)
{
	struct mts64 *mts = substream->rmidi->private_data;
	unsigned long flags;

	spin_lock_irqsave(&mts->lock, flags);
	if (up)
		mts->mode[substream->number] |= MTS64_MODE_INPUT_TRIGGERED;
	else
 		mts->mode[substream->number] &= ~MTS64_MODE_INPUT_TRIGGERED;
	
	spin_unlock_irqrestore(&mts->lock, flags);
}

static struct snd_rawmidi_ops snd_mts64_rawmidi_output_ops = {
	.open    = snd_mts64_rawmidi_open,
	.close   = snd_mts64_rawmidi_close,
	.trigger = snd_mts64_rawmidi_output_trigger
};

static struct snd_rawmidi_ops snd_mts64_rawmidi_input_ops = {
	.open    = snd_mts64_rawmidi_open,
	.close   = snd_mts64_rawmidi_close,
	.trigger = snd_mts64_rawmidi_input_trigger
};

/* Create and initialize the rawmidi component */
static int snd_mts64_rawmidi_create(struct snd_card *card)
{
	struct mts64 *mts = card->private_data;
	struct snd_rawmidi *rmidi;
	struct snd_rawmidi_substream *substream;
	struct list_head *list;
	int err;
	
	err = snd_rawmidi_new(card, CARD_NAME, 0, 
			      MTS64_NUM_OUTPUT_PORTS, 
			      MTS64_NUM_INPUT_PORTS, 
			      &rmidi);
	if (err < 0) 
		return err;

	rmidi->private_data = mts;
	strcpy(rmidi->name, CARD_NAME);
	rmidi->info_flags = SNDRV_RAWMIDI_INFO_OUTPUT |
		            SNDRV_RAWMIDI_INFO_INPUT |
                            SNDRV_RAWMIDI_INFO_DUPLEX;

	mts->rmidi = rmidi;

	/* register rawmidi ops */
	snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, 
			    &snd_mts64_rawmidi_output_ops);
	snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, 
			    &snd_mts64_rawmidi_input_ops);

	/* name substreams */
	/* output */
	list_for_each(list, 
		      &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams) {
		substream = list_entry(list, struct snd_rawmidi_substream, list);
		sprintf(substream->name,
			"Miditerminal %d", substream->number+1);
	}
	/* input */
	list_for_each(list, 
		      &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams) {
		substream = list_entry(list, struct snd_rawmidi_substream, list);
		mts->midi_input_substream[substream->number] = substream;
		switch(substream->number) {
		case MTS64_SMPTE_SUBSTREAM:
			strcpy(substream->name, "Miditerminal SMPTE");
			break;
		default:
			sprintf(substream->name,
				"Miditerminal %d", substream->number+1);
		}
	}

	/* controls */
	err = snd_mts64_ctl_create(card, mts);

	return err;
}

/*********************************************************************
 * parport stuff
 *********************************************************************/
static void snd_mts64_interrupt(void *private)
{
	struct mts64 *mts = ((struct snd_card*)private)->private_data;
	u16 ret;
	u8 status, data;
	struct snd_rawmidi_substream *substream;

	spin_lock(&mts->lock);
	ret = mts64_read(mts->pardev->port);
	data = ret & 0x00ff;
	status = ret >> 8;

	if (status & MTS64_STAT_PORT) {
		mts->current_midi_input_port = mts64_map_midi_input(data);
	} else {
		if (mts->current_midi_input_port == -1) 
			goto __out;
		substream = mts->midi_input_substream[mts->current_midi_input_port];
		if (mts->mode[substream->number] & MTS64_MODE_INPUT_TRIGGERED)
			snd_rawmidi_receive(substream, &data, 1);
	}
__out:
	spin_unlock(&mts->lock);
}

static void snd_mts64_attach(struct parport *p)
{
	struct platform_device *device;

	device = platform_device_alloc(PLATFORM_DRIVER, device_count);
	if (!device)
		return;

	/* Temporary assignment to forward the parport */
	platform_set_drvdata(device, p);

	if (platform_device_add(device) < 0) {
		platform_device_put(device);
		return;
	}

	/* Since we dont get the return value of probe
	 * We need to check if device probing succeeded or not */
	if (!platform_get_drvdata(device)) {
		platform_device_unregister(device);
		return;
	}

	/* register device in global table */
	platform_devices[device_count] = device;
	device_count++;
}

static void snd_mts64_detach(struct parport *p)
{
	/* nothing to do here */
}

static int snd_mts64_dev_probe(struct pardevice *pardev)
{
	if (strcmp(pardev->name, DRIVER_NAME))
		return -ENODEV;

	return 0;
}

static struct parport_driver mts64_parport_driver = {
	.name		= "mts64",
	.probe		= snd_mts64_dev_probe,
	.match_port	= snd_mts64_attach,
	.detach		= snd_mts64_detach,
	.devmodel	= true,
};

/*********************************************************************
 * platform stuff
 *********************************************************************/
static void snd_mts64_card_private_free(struct snd_card *card)
{
	struct mts64 *mts = card->private_data;
	struct pardevice *pardev = mts->pardev;

	if (pardev) {
		parport_release(pardev);
		parport_unregister_device(pardev);
	}

	snd_mts64_free(mts);
}

static int snd_mts64_probe(struct platform_device *pdev)
{
	struct pardevice *pardev;
	struct parport *p;
	int dev = pdev->id;
	struct snd_card *card = NULL;
	struct mts64 *mts = NULL;
	int err;
	struct pardev_cb mts64_cb = {
		.preempt = NULL,
		.wakeup = NULL,
		.irq_func = snd_mts64_interrupt,	/* ISR */
		.flags = PARPORT_DEV_EXCL,		/* flags */
	};

	p = platform_get_drvdata(pdev);
	platform_set_drvdata(pdev, NULL);

	if (dev >= SNDRV_CARDS)
		return -ENODEV;
	if (!enable[dev]) 
		return -ENOENT;

	err = snd_card_new(&pdev->dev, index[dev], id[dev], THIS_MODULE,
			   0, &card);
	if (err < 0) {
		snd_printd("Cannot create card\n");
		return err;
	}
	strcpy(card->driver, DRIVER_NAME);
	strcpy(card->shortname, "ESI " CARD_NAME);
	sprintf(card->longname,  "%s at 0x%lx, irq %i", 
		card->shortname, p->base, p->irq);

	mts64_cb.private = card;			 /* private */
	pardev = parport_register_dev_model(p,		 /* port */
					    DRIVER_NAME, /* name */
					    &mts64_cb,	 /* callbacks */
					    pdev->id);	 /* device number */
	if (!pardev) {
		snd_printd("Cannot register pardevice\n");
		err = -EIO;
		goto __err;
	}

	/* claim parport */
	if (parport_claim(pardev)) {
		snd_printd("Cannot claim parport 0x%lx\n", pardev->port->base);
		err = -EIO;
		goto free_pardev;
	}

	if ((err = snd_mts64_create(card, pardev, &mts)) < 0) {
		snd_printd("Cannot create main component\n");
		goto release_pardev;
	}
	card->private_data = mts;
	card->private_free = snd_mts64_card_private_free;

	err = mts64_probe(p);
	if (err) {
		err = -EIO;
		goto __err;
	}
	
	if ((err = snd_mts64_rawmidi_create(card)) < 0) {
		snd_printd("Creating Rawmidi component failed\n");
		goto __err;
	}

	/* init device */
	if ((err = mts64_device_init(p)) < 0)
		goto __err;

	platform_set_drvdata(pdev, card);

	/* At this point card will be usable */
	if ((err = snd_card_register(card)) < 0) {
		snd_printd("Cannot register card\n");
		goto __err;
	}

	snd_printk(KERN_INFO "ESI Miditerminal 4140 on 0x%lx\n", p->base);
	return 0;

release_pardev:
	parport_release(pardev);
free_pardev:
	parport_unregister_device(pardev);
__err:
	snd_card_free(card);
	return err;
}

static int snd_mts64_remove(struct platform_device *pdev)
{
	struct snd_card *card = platform_get_drvdata(pdev);

	if (card)
		snd_card_free(card);

	return 0;
}

static struct platform_driver snd_mts64_driver = {
	.probe  = snd_mts64_probe,
	.remove = snd_mts64_remove,
	.driver = {
		.name = PLATFORM_DRIVER,
	}
};

/*********************************************************************
 * module init stuff
 *********************************************************************/
static void snd_mts64_unregister_all(void)
{
	int i;

	for (i = 0; i < SNDRV_CARDS; ++i) {
		if (platform_devices[i]) {
			platform_device_unregister(platform_devices[i]);
			platform_devices[i] = NULL;
		}
	}		
	platform_driver_unregister(&snd_mts64_driver);
	parport_unregister_driver(&mts64_parport_driver);
}

static int __init snd_mts64_module_init(void)
{
	int err;

	if ((err = platform_driver_register(&snd_mts64_driver)) < 0)
		return err;

	if (parport_register_driver(&mts64_parport_driver) != 0) {
		platform_driver_unregister(&snd_mts64_driver);
		return -EIO;
	}

	if (device_count == 0) {
		snd_mts64_unregister_all();
		return -ENODEV;
	}

	return 0;
}

static void __exit snd_mts64_module_exit(void)
{
	snd_mts64_unregister_all();
}

module_init(snd_mts64_module_init);
module_exit(snd_mts64_module_exit);