summaryrefslogtreecommitdiff
path: root/sound/isa/es1688/es1688_lib.c
blob: b5450143407b2f43041921c081b16e973899986e (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
/*
 *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
 *  Routines for control of ESS ES1688/688/488 chip
 *
 *
 *   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., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 *
 */

#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/ioport.h>
#include <linux/module.h>
#include <sound/core.h>
#include <sound/es1688.h>
#include <sound/initval.h>

#include <asm/io.h>
#include <asm/dma.h>

MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
MODULE_DESCRIPTION("ESS ESx688 lowlevel module");
MODULE_LICENSE("GPL");

static int snd_es1688_dsp_command(struct snd_es1688 *chip, unsigned char val)
{
	int i;

	for (i = 10000; i; i--)
		if ((inb(ES1688P(chip, STATUS)) & 0x80) == 0) {
			outb(val, ES1688P(chip, COMMAND));
			return 1;
		}
#ifdef CONFIG_SND_DEBUG
	printk(KERN_DEBUG "snd_es1688_dsp_command: timeout (0x%x)\n", val);
#endif
	return 0;
}

static int snd_es1688_dsp_get_byte(struct snd_es1688 *chip)
{
	int i;

	for (i = 1000; i; i--)
		if (inb(ES1688P(chip, DATA_AVAIL)) & 0x80)
			return inb(ES1688P(chip, READ));
	snd_printd("es1688 get byte failed: 0x%lx = 0x%x!!!\n", ES1688P(chip, DATA_AVAIL), inb(ES1688P(chip, DATA_AVAIL)));
	return -ENODEV;
}

static int snd_es1688_write(struct snd_es1688 *chip,
			    unsigned char reg, unsigned char data)
{
	if (!snd_es1688_dsp_command(chip, reg))
		return 0;
	return snd_es1688_dsp_command(chip, data);
}

static int snd_es1688_read(struct snd_es1688 *chip, unsigned char reg)
{
	/* Read a byte from an extended mode register of ES1688 */
	if (!snd_es1688_dsp_command(chip, 0xc0))
		return -1;
	if (!snd_es1688_dsp_command(chip, reg))
		return -1;
	return snd_es1688_dsp_get_byte(chip);
}

void snd_es1688_mixer_write(struct snd_es1688 *chip,
			    unsigned char reg, unsigned char data)
{
	outb(reg, ES1688P(chip, MIXER_ADDR));
	udelay(10);
	outb(data, ES1688P(chip, MIXER_DATA));
	udelay(10);
}

static unsigned char snd_es1688_mixer_read(struct snd_es1688 *chip, unsigned char reg)
{
	unsigned char result;

	outb(reg, ES1688P(chip, MIXER_ADDR));
	udelay(10);
	result = inb(ES1688P(chip, MIXER_DATA));
	udelay(10);
	return result;
}

int snd_es1688_reset(struct snd_es1688 *chip)
{
	int i;

	outb(3, ES1688P(chip, RESET));		/* valid only for ESS chips, SB -> 1 */
	udelay(10);
	outb(0, ES1688P(chip, RESET));
	udelay(30);
	for (i = 0; i < 1000 && !(inb(ES1688P(chip, DATA_AVAIL)) & 0x80); i++);
	if (inb(ES1688P(chip, READ)) != 0xaa) {
		snd_printd("ess_reset at 0x%lx: failed!!!\n", chip->port);
		return -ENODEV;
	}
	snd_es1688_dsp_command(chip, 0xc6);	/* enable extended mode */
	return 0;
}
EXPORT_SYMBOL(snd_es1688_reset);

static int snd_es1688_probe(struct snd_es1688 *chip)
{
	unsigned long flags;
	unsigned short major, minor, hw;
	int i;

	/*
	 *  initialization sequence
	 */

	spin_lock_irqsave(&chip->reg_lock, flags);	/* Some ESS1688 cards need this */
	inb(ES1688P(chip, ENABLE1));	/* ENABLE1 */
	inb(ES1688P(chip, ENABLE1));	/* ENABLE1 */
	inb(ES1688P(chip, ENABLE1));	/* ENABLE1 */
	inb(ES1688P(chip, ENABLE2));	/* ENABLE2 */
	inb(ES1688P(chip, ENABLE1));	/* ENABLE1 */
	inb(ES1688P(chip, ENABLE2));	/* ENABLE2 */
	inb(ES1688P(chip, ENABLE1));	/* ENABLE1 */
	inb(ES1688P(chip, ENABLE1));	/* ENABLE1 */
	inb(ES1688P(chip, ENABLE2));	/* ENABLE2 */
	inb(ES1688P(chip, ENABLE1));	/* ENABLE1 */
	inb(ES1688P(chip, ENABLE0));	/* ENABLE0 */

	if (snd_es1688_reset(chip) < 0) {
		snd_printdd("ESS: [0x%lx] reset failed... 0x%x\n", chip->port, inb(ES1688P(chip, READ)));
		spin_unlock_irqrestore(&chip->reg_lock, flags);
		return -ENODEV;
	}
	snd_es1688_dsp_command(chip, 0xe7);	/* return identification */

	for (i = 1000, major = minor = 0; i; i--) {
		if (inb(ES1688P(chip, DATA_AVAIL)) & 0x80) {
			if (major == 0) {
				major = inb(ES1688P(chip, READ));
			} else {
				minor = inb(ES1688P(chip, READ));
			}
		}
	}

	spin_unlock_irqrestore(&chip->reg_lock, flags);

	snd_printdd("ESS: [0x%lx] found.. major = 0x%x, minor = 0x%x\n", chip->port, major, minor);

	chip->version = (major << 8) | minor;
	if (!chip->version)
		return -ENODEV;	/* probably SB */

	hw = ES1688_HW_AUTO;
	switch (chip->version & 0xfff0) {
	case 0x4880:
		snd_printk(KERN_ERR "[0x%lx] ESS: AudioDrive ES488 detected, "
			   "but driver is in another place\n", chip->port);
		return -ENODEV;
	case 0x6880:
		hw = (chip->version & 0x0f) >= 8 ? ES1688_HW_1688 : ES1688_HW_688;
		break;
	default:
		snd_printk(KERN_ERR "[0x%lx] ESS: unknown AudioDrive chip "
			   "with version 0x%x (Jazz16 soundcard?)\n",
			   chip->port, chip->version);
		return -ENODEV;
	}

	spin_lock_irqsave(&chip->reg_lock, flags);
	snd_es1688_write(chip, 0xb1, 0x10);	/* disable IRQ */
	snd_es1688_write(chip, 0xb2, 0x00);	/* disable DMA */
	spin_unlock_irqrestore(&chip->reg_lock, flags);

	/* enable joystick, but disable OPL3 */
	spin_lock_irqsave(&chip->mixer_lock, flags);
	snd_es1688_mixer_write(chip, 0x40, 0x01);
	spin_unlock_irqrestore(&chip->mixer_lock, flags);

	return 0;
}

static int snd_es1688_init(struct snd_es1688 * chip, int enable)
{
	static int irqs[16] = {-1, -1, 0, -1, -1, 1, -1, 2, -1, 0, 3, -1, -1, -1, -1, -1};
	unsigned long flags;
	int cfg, irq_bits, dma, dma_bits, tmp, tmp1;

	/* ok.. setup MPU-401 port and joystick and OPL3 */
	cfg = 0x01;		/* enable joystick, but disable OPL3 */
	if (enable && chip->mpu_port >= 0x300 && chip->mpu_irq > 0 && chip->hardware != ES1688_HW_688) {
		tmp = (chip->mpu_port & 0x0f0) >> 4;
		if (tmp <= 3) {
			switch (chip->mpu_irq) {
			case 9:
				tmp1 = 4;
				break;
			case 5:
				tmp1 = 5;
				break;
			case 7:
				tmp1 = 6;
				break;
			case 10:
				tmp1 = 7;
				break;
			default:
				tmp1 = 0;
			}
			if (tmp1) {
				cfg |= (tmp << 3) | (tmp1 << 5);
			}
		}
	}
#if 0
	snd_printk(KERN_DEBUG "mpu cfg = 0x%x\n", cfg);
#endif
	spin_lock_irqsave(&chip->reg_lock, flags);
	snd_es1688_mixer_write(chip, 0x40, cfg);
	spin_unlock_irqrestore(&chip->reg_lock, flags);
	/* --- */
	spin_lock_irqsave(&chip->reg_lock, flags);
	snd_es1688_read(chip, 0xb1);
	snd_es1688_read(chip, 0xb2);
	spin_unlock_irqrestore(&chip->reg_lock, flags);
	if (enable) {
		cfg = 0xf0;	/* enable only DMA counter interrupt */
		irq_bits = irqs[chip->irq & 0x0f];
		if (irq_bits < 0) {
			snd_printk(KERN_ERR "[0x%lx] ESS: bad IRQ %d "
				   "for ES1688 chip!!\n",
				   chip->port, chip->irq);
#if 0
			irq_bits = 0;
			cfg = 0x10;
#endif
			return -EINVAL;
		}
		spin_lock_irqsave(&chip->reg_lock, flags);
		snd_es1688_write(chip, 0xb1, cfg | (irq_bits << 2));
		spin_unlock_irqrestore(&chip->reg_lock, flags);
		cfg = 0xf0;	/* extended mode DMA enable */
		dma = chip->dma8;
		if (dma > 3 || dma == 2) {
			snd_printk(KERN_ERR "[0x%lx] ESS: bad DMA channel %d "
				   "for ES1688 chip!!\n", chip->port, dma);
#if 0
			dma_bits = 0;
			cfg = 0x00;	/* disable all DMA */
#endif
			return -EINVAL;
		} else {
			dma_bits = dma;
			if (dma != 3)
				dma_bits++;
		}
		spin_lock_irqsave(&chip->reg_lock, flags);
		snd_es1688_write(chip, 0xb2, cfg | (dma_bits << 2));
		spin_unlock_irqrestore(&chip->reg_lock, flags);
	} else {
		spin_lock_irqsave(&chip->reg_lock, flags);
		snd_es1688_write(chip, 0xb1, 0x10);	/* disable IRQ */
		snd_es1688_write(chip, 0xb2, 0x00);	/* disable DMA */
		spin_unlock_irqrestore(&chip->reg_lock, flags);
	}
	spin_lock_irqsave(&chip->reg_lock, flags);
	snd_es1688_read(chip, 0xb1);
	snd_es1688_read(chip, 0xb2);
	snd_es1688_reset(chip);
	spin_unlock_irqrestore(&chip->reg_lock, flags);
	return 0;
}

/*

 */

static struct snd_ratnum clocks[2] = {
	{
		.num = 795444,
		.den_min = 1,
		.den_max = 128,
		.den_step = 1,
	},
	{
		.num = 397722,
		.den_min = 1,
		.den_max = 128,
		.den_step = 1,
	}
};

static struct snd_pcm_hw_constraint_ratnums hw_constraints_clocks  = {
	.nrats = 2,
	.rats = clocks,
};

static void snd_es1688_set_rate(struct snd_es1688 *chip, struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	unsigned int bits, divider;

	if (runtime->rate_num == clocks[0].num)
		bits = 256 - runtime->rate_den;
	else
		bits = 128 - runtime->rate_den;
	/* set filter register */
	divider = 256 - 7160000*20/(8*82*runtime->rate);
	/* write result to hardware */
	snd_es1688_write(chip, 0xa1, bits);
	snd_es1688_write(chip, 0xa2, divider);
}

static int snd_es1688_ioctl(struct snd_pcm_substream *substream,
			    unsigned int cmd, void *arg)
{
	return snd_pcm_lib_ioctl(substream, cmd, arg);
}

static int snd_es1688_trigger(struct snd_es1688 *chip, int cmd, unsigned char value)
{
	int val;

	if (cmd == SNDRV_PCM_TRIGGER_STOP) {
		value = 0x00;
	} else if (cmd != SNDRV_PCM_TRIGGER_START) {
		return -EINVAL;
	}
	spin_lock(&chip->reg_lock);
	chip->trigger_value = value;
	val = snd_es1688_read(chip, 0xb8);
	if ((val < 0) || (val & 0x0f) == value) {
		spin_unlock(&chip->reg_lock);
		return -EINVAL;	/* something is wrong */
	}
#if 0
	printk(KERN_DEBUG "trigger: val = 0x%x, value = 0x%x\n", val, value);
	printk(KERN_DEBUG "trigger: pointer = 0x%x\n",
	       snd_dma_pointer(chip->dma8, chip->dma_size));
#endif
	snd_es1688_write(chip, 0xb8, (val & 0xf0) | value);
	spin_unlock(&chip->reg_lock);
	return 0;
}

static int snd_es1688_hw_params(struct snd_pcm_substream *substream,
				struct snd_pcm_hw_params *hw_params)
{
	return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
}

static int snd_es1688_hw_free(struct snd_pcm_substream *substream)
{
	return snd_pcm_lib_free_pages(substream);
}

static int snd_es1688_playback_prepare(struct snd_pcm_substream *substream)
{
	unsigned long flags;
	struct snd_es1688 *chip = snd_pcm_substream_chip(substream);
	struct snd_pcm_runtime *runtime = substream->runtime;
	unsigned int size = snd_pcm_lib_buffer_bytes(substream);
	unsigned int count = snd_pcm_lib_period_bytes(substream);

	chip->dma_size = size;
	spin_lock_irqsave(&chip->reg_lock, flags);
	snd_es1688_reset(chip);
	snd_es1688_set_rate(chip, substream);
	snd_es1688_write(chip, 0xb8, 4);	/* auto init DMA mode */
	snd_es1688_write(chip, 0xa8, (snd_es1688_read(chip, 0xa8) & ~0x03) | (3 - runtime->channels));
	snd_es1688_write(chip, 0xb9, 2);	/* demand mode (4 bytes/request) */
	if (runtime->channels == 1) {
		if (snd_pcm_format_width(runtime->format) == 8) {
			/* 8. bit mono */
			snd_es1688_write(chip, 0xb6, 0x80);
			snd_es1688_write(chip, 0xb7, 0x51);
			snd_es1688_write(chip, 0xb7, 0xd0);
		} else {
			/* 16. bit mono */
			snd_es1688_write(chip, 0xb6, 0x00);
			snd_es1688_write(chip, 0xb7, 0x71);
			snd_es1688_write(chip, 0xb7, 0xf4);
		}
	} else {
		if (snd_pcm_format_width(runtime->format) == 8) {
			/* 8. bit stereo */
			snd_es1688_write(chip, 0xb6, 0x80);
			snd_es1688_write(chip, 0xb7, 0x51);
			snd_es1688_write(chip, 0xb7, 0x98);
		} else {
			/* 16. bit stereo */
			snd_es1688_write(chip, 0xb6, 0x00);
			snd_es1688_write(chip, 0xb7, 0x71);
			snd_es1688_write(chip, 0xb7, 0xbc);
		}
	}
	snd_es1688_write(chip, 0xb1, (snd_es1688_read(chip, 0xb1) & 0x0f) | 0x50);
	snd_es1688_write(chip, 0xb2, (snd_es1688_read(chip, 0xb2) & 0x0f) | 0x50);
	snd_es1688_dsp_command(chip, ES1688_DSP_CMD_SPKON);
	spin_unlock_irqrestore(&chip->reg_lock, flags);
	/* --- */
	count = -count;
	snd_dma_program(chip->dma8, runtime->dma_addr, size, DMA_MODE_WRITE | DMA_AUTOINIT);
	spin_lock_irqsave(&chip->reg_lock, flags);
	snd_es1688_write(chip, 0xa4, (unsigned char) count);
	snd_es1688_write(chip, 0xa5, (unsigned char) (count >> 8));
	spin_unlock_irqrestore(&chip->reg_lock, flags);
	return 0;
}

static int snd_es1688_playback_trigger(struct snd_pcm_substream *substream,
				       int cmd)
{
	struct snd_es1688 *chip = snd_pcm_substream_chip(substream);
	return snd_es1688_trigger(chip, cmd, 0x05);
}

static int snd_es1688_capture_prepare(struct snd_pcm_substream *substream)
{
	unsigned long flags;
	struct snd_es1688 *chip = snd_pcm_substream_chip(substream);
	struct snd_pcm_runtime *runtime = substream->runtime;
	unsigned int size = snd_pcm_lib_buffer_bytes(substream);
	unsigned int count = snd_pcm_lib_period_bytes(substream);

	chip->dma_size = size;
	spin_lock_irqsave(&chip->reg_lock, flags);
	snd_es1688_reset(chip);
	snd_es1688_set_rate(chip, substream);
	snd_es1688_dsp_command(chip, ES1688_DSP_CMD_SPKOFF);
	snd_es1688_write(chip, 0xb8, 0x0e);	/* auto init DMA mode */
	snd_es1688_write(chip, 0xa8, (snd_es1688_read(chip, 0xa8) & ~0x03) | (3 - runtime->channels));
	snd_es1688_write(chip, 0xb9, 2);	/* demand mode (4 bytes/request) */
	if (runtime->channels == 1) {
		if (snd_pcm_format_width(runtime->format) == 8) {
			/* 8. bit mono */
			snd_es1688_write(chip, 0xb7, 0x51);
			snd_es1688_write(chip, 0xb7, 0xd0);
		} else {
			/* 16. bit mono */
			snd_es1688_write(chip, 0xb7, 0x71);
			snd_es1688_write(chip, 0xb7, 0xf4);
		}
	} else {
		if (snd_pcm_format_width(runtime->format) == 8) {
			/* 8. bit stereo */
			snd_es1688_write(chip, 0xb7, 0x51);
			snd_es1688_write(chip, 0xb7, 0x98);
		} else {
			/* 16. bit stereo */
			snd_es1688_write(chip, 0xb7, 0x71);
			snd_es1688_write(chip, 0xb7, 0xbc);
		}
	}
	snd_es1688_write(chip, 0xb1, (snd_es1688_read(chip, 0xb1) & 0x0f) | 0x50);
	snd_es1688_write(chip, 0xb2, (snd_es1688_read(chip, 0xb2) & 0x0f) | 0x50);
	spin_unlock_irqrestore(&chip->reg_lock, flags);
	/* --- */
	count = -count;
	snd_dma_program(chip->dma8, runtime->dma_addr, size, DMA_MODE_READ | DMA_AUTOINIT);
	spin_lock_irqsave(&chip->reg_lock, flags);
	snd_es1688_write(chip, 0xa4, (unsigned char) count);
	snd_es1688_write(chip, 0xa5, (unsigned char) (count >> 8));
	spin_unlock_irqrestore(&chip->reg_lock, flags);
	return 0;
}

static int snd_es1688_capture_trigger(struct snd_pcm_substream *substream,
				      int cmd)
{
	struct snd_es1688 *chip = snd_pcm_substream_chip(substream);
	return snd_es1688_trigger(chip, cmd, 0x0f);
}

static irqreturn_t snd_es1688_interrupt(int irq, void *dev_id)
{
	struct snd_es1688 *chip = dev_id;

	if (chip->trigger_value == 0x05)	/* ok.. playback is active */
		snd_pcm_period_elapsed(chip->playback_substream);
	if (chip->trigger_value == 0x0f)	/* ok.. capture is active */
		snd_pcm_period_elapsed(chip->capture_substream);

	inb(ES1688P(chip, DATA_AVAIL));	/* ack interrupt */
	return IRQ_HANDLED;
}

static snd_pcm_uframes_t snd_es1688_playback_pointer(struct snd_pcm_substream *substream)
{
	struct snd_es1688 *chip = snd_pcm_substream_chip(substream);
	size_t ptr;
	
	if (chip->trigger_value != 0x05)
		return 0;
	ptr = snd_dma_pointer(chip->dma8, chip->dma_size);
	return bytes_to_frames(substream->runtime, ptr);
}

static snd_pcm_uframes_t snd_es1688_capture_pointer(struct snd_pcm_substream *substream)
{
	struct snd_es1688 *chip = snd_pcm_substream_chip(substream);
	size_t ptr;
	
	if (chip->trigger_value != 0x0f)
		return 0;
	ptr = snd_dma_pointer(chip->dma8, chip->dma_size);
	return bytes_to_frames(substream->runtime, ptr);
}

/*

 */

static struct snd_pcm_hardware snd_es1688_playback =
{
	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
				 SNDRV_PCM_INFO_MMAP_VALID),
	.formats =		SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE,
	.rates =		SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
	.rate_min =		4000,
	.rate_max =		48000,
	.channels_min =		1,
	.channels_max =		2,
	.buffer_bytes_max =	65536,
	.period_bytes_min =	64,
	.period_bytes_max =	65536,
	.periods_min =		1,
	.periods_max =		1024,
	.fifo_size =		0,
};

static struct snd_pcm_hardware snd_es1688_capture =
{
	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
				 SNDRV_PCM_INFO_MMAP_VALID),
	.formats =		SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE,
	.rates =		SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
	.rate_min =		4000,
	.rate_max =		48000,
	.channels_min =		1,
	.channels_max =		2,
	.buffer_bytes_max =	65536,
	.period_bytes_min =	64,
	.period_bytes_max =	65536,
	.periods_min =		1,
	.periods_max =		1024,
	.fifo_size =		0,
};

/*

 */

static int snd_es1688_playback_open(struct snd_pcm_substream *substream)
{
	struct snd_es1688 *chip = snd_pcm_substream_chip(substream);
	struct snd_pcm_runtime *runtime = substream->runtime;

	if (chip->capture_substream != NULL)
		return -EAGAIN;
	chip->playback_substream = substream;
	runtime->hw = snd_es1688_playback;
	snd_pcm_hw_constraint_ratnums(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
				      &hw_constraints_clocks);
	return 0;
}

static int snd_es1688_capture_open(struct snd_pcm_substream *substream)
{
	struct snd_es1688 *chip = snd_pcm_substream_chip(substream);
	struct snd_pcm_runtime *runtime = substream->runtime;

	if (chip->playback_substream != NULL)
		return -EAGAIN;
	chip->capture_substream = substream;
	runtime->hw = snd_es1688_capture;
	snd_pcm_hw_constraint_ratnums(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
				      &hw_constraints_clocks);
	return 0;
}

static int snd_es1688_playback_close(struct snd_pcm_substream *substream)
{
	struct snd_es1688 *chip = snd_pcm_substream_chip(substream);

	chip->playback_substream = NULL;
	return 0;
}

static int snd_es1688_capture_close(struct snd_pcm_substream *substream)
{
	struct snd_es1688 *chip = snd_pcm_substream_chip(substream);

	chip->capture_substream = NULL;
	return 0;
}

static int snd_es1688_free(struct snd_es1688 *chip)
{
	if (chip->hardware != ES1688_HW_UNDEF)
		snd_es1688_init(chip, 0);
	release_and_free_resource(chip->res_port);
	if (chip->irq >= 0)
		free_irq(chip->irq, (void *) chip);
	if (chip->dma8 >= 0) {
		disable_dma(chip->dma8);
		free_dma(chip->dma8);
	}
	return 0;
}

static int snd_es1688_dev_free(struct snd_device *device)
{
	struct snd_es1688 *chip = device->device_data;
	return snd_es1688_free(chip);
}

static const char *snd_es1688_chip_id(struct snd_es1688 *chip)
{
	static char tmp[16];
	sprintf(tmp, "ES%s688 rev %i", chip->hardware == ES1688_HW_688 ? "" : "1", chip->version & 0x0f);
	return tmp;
}

int snd_es1688_create(struct snd_card *card,
		      struct snd_es1688 *chip,
		      unsigned long port,
		      unsigned long mpu_port,
		      int irq,
		      int mpu_irq,
		      int dma8,
		      unsigned short hardware)
{
	static struct snd_device_ops ops = {
		.dev_free =	snd_es1688_dev_free,
	};
                                
	int err;

	if (chip == NULL)
		return -ENOMEM;
	chip->irq = -1;
	chip->dma8 = -1;
	chip->hardware = ES1688_HW_UNDEF;
	
	chip->res_port = request_region(port + 4, 12, "ES1688");
	if (chip->res_port == NULL) {
		snd_printk(KERN_ERR "es1688: can't grab port 0x%lx\n", port + 4);
		err = -EBUSY;
		goto exit;
	}

	err = request_irq(irq, snd_es1688_interrupt, 0, "ES1688", (void *) chip);
	if (err < 0) {
		snd_printk(KERN_ERR "es1688: can't grab IRQ %d\n", irq);
		goto exit;
	}

	chip->irq = irq;
	err = request_dma(dma8, "ES1688");

	if (err < 0) {
		snd_printk(KERN_ERR "es1688: can't grab DMA8 %d\n", dma8);
		goto exit;
	}
	chip->dma8 = dma8;

	spin_lock_init(&chip->reg_lock);
	spin_lock_init(&chip->mixer_lock);
	chip->port = port;
	mpu_port &= ~0x000f;
	if (mpu_port < 0x300 || mpu_port > 0x330)
		mpu_port = 0;
	chip->mpu_port = mpu_port;
	chip->mpu_irq = mpu_irq;
	chip->hardware = hardware;

	err = snd_es1688_probe(chip);
	if (err < 0)
		goto exit;

	err = snd_es1688_init(chip, 1);
	if (err < 0)
		goto exit;

	/* Register device */
	err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
exit:
	if (err)
		snd_es1688_free(chip);
	return err;
}

static struct snd_pcm_ops snd_es1688_playback_ops = {
	.open =			snd_es1688_playback_open,
	.close =		snd_es1688_playback_close,
	.ioctl =		snd_es1688_ioctl,
	.hw_params =		snd_es1688_hw_params,
	.hw_free =		snd_es1688_hw_free,
	.prepare =		snd_es1688_playback_prepare,
	.trigger =		snd_es1688_playback_trigger,
	.pointer =		snd_es1688_playback_pointer,
};

static struct snd_pcm_ops snd_es1688_capture_ops = {
	.open =			snd_es1688_capture_open,
	.close =		snd_es1688_capture_close,
	.ioctl =		snd_es1688_ioctl,
	.hw_params =		snd_es1688_hw_params,
	.hw_free =		snd_es1688_hw_free,
	.prepare =		snd_es1688_capture_prepare,
	.trigger =		snd_es1688_capture_trigger,
	.pointer =		snd_es1688_capture_pointer,
};

int snd_es1688_pcm(struct snd_card *card, struct snd_es1688 *chip,
		   int device, struct snd_pcm **rpcm)
{
	struct snd_pcm *pcm;
	int err;

	err = snd_pcm_new(card, "ESx688", device, 1, 1, &pcm);
	if (err < 0)
		return err;

	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_es1688_playback_ops);
	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_es1688_capture_ops);

	pcm->private_data = chip;
	pcm->info_flags = SNDRV_PCM_INFO_HALF_DUPLEX;
	sprintf(pcm->name, snd_es1688_chip_id(chip));
	chip->pcm = pcm;

	snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
					      snd_dma_isa_data(),
					      64*1024, 64*1024);

	if (rpcm)
		*rpcm = pcm;
	return 0;
}

/*
 *  MIXER part
 */

static int snd_es1688_info_mux(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
{
	static const char * const texts[8] = {
		"Mic", "Mic Master", "CD", "AOUT",
		"Mic1", "Mix", "Line", "Master"
	};

	return snd_ctl_enum_info(uinfo, 1, 8, texts);
}

static int snd_es1688_get_mux(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
	struct snd_es1688 *chip = snd_kcontrol_chip(kcontrol);
	ucontrol->value.enumerated.item[0] = snd_es1688_mixer_read(chip, ES1688_REC_DEV) & 7;
	return 0;
}

static int snd_es1688_put_mux(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
	struct snd_es1688 *chip = snd_kcontrol_chip(kcontrol);
	unsigned long flags;
	unsigned char oval, nval;
	int change;
	
	if (ucontrol->value.enumerated.item[0] > 8)
		return -EINVAL;
	spin_lock_irqsave(&chip->reg_lock, flags);
	oval = snd_es1688_mixer_read(chip, ES1688_REC_DEV);
	nval = (ucontrol->value.enumerated.item[0] & 7) | (oval & ~15);
	change = nval != oval;
	if (change)
		snd_es1688_mixer_write(chip, ES1688_REC_DEV, nval);
	spin_unlock_irqrestore(&chip->reg_lock, flags);
	return change;
}

#define ES1688_SINGLE(xname, xindex, reg, shift, mask, invert) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
  .info = snd_es1688_info_single, \
  .get = snd_es1688_get_single, .put = snd_es1688_put_single, \
  .private_value = reg | (shift << 8) | (mask << 16) | (invert << 24) }

static int snd_es1688_info_single(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
{
	int mask = (kcontrol->private_value >> 16) & 0xff;

	uinfo->type = mask == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
	uinfo->count = 1;
	uinfo->value.integer.min = 0;
	uinfo->value.integer.max = mask;
	return 0;
}

static int snd_es1688_get_single(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
	struct snd_es1688 *chip = snd_kcontrol_chip(kcontrol);
	unsigned long flags;
	int reg = kcontrol->private_value & 0xff;
	int shift = (kcontrol->private_value >> 8) & 0xff;
	int mask = (kcontrol->private_value >> 16) & 0xff;
	int invert = (kcontrol->private_value >> 24) & 0xff;
	
	spin_lock_irqsave(&chip->reg_lock, flags);
	ucontrol->value.integer.value[0] = (snd_es1688_mixer_read(chip, reg) >> shift) & mask;
	spin_unlock_irqrestore(&chip->reg_lock, flags);
	if (invert)
		ucontrol->value.integer.value[0] = mask - ucontrol->value.integer.value[0];
	return 0;
}

static int snd_es1688_put_single(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
	struct snd_es1688 *chip = snd_kcontrol_chip(kcontrol);
	unsigned long flags;
	int reg = kcontrol->private_value & 0xff;
	int shift = (kcontrol->private_value >> 8) & 0xff;
	int mask = (kcontrol->private_value >> 16) & 0xff;
	int invert = (kcontrol->private_value >> 24) & 0xff;
	int change;
	unsigned char oval, nval;
	
	nval = (ucontrol->value.integer.value[0] & mask);
	if (invert)
		nval = mask - nval;
	nval <<= shift;
	spin_lock_irqsave(&chip->reg_lock, flags);
	oval = snd_es1688_mixer_read(chip, reg);
	nval = (oval & ~(mask << shift)) | nval;
	change = nval != oval;
	if (change)
		snd_es1688_mixer_write(chip, reg, nval);
	spin_unlock_irqrestore(&chip->reg_lock, flags);
	return change;
}

#define ES1688_DOUBLE(xname, xindex, left_reg, right_reg, shift_left, shift_right, mask, invert) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
  .info = snd_es1688_info_double, \
  .get = snd_es1688_get_double, .put = snd_es1688_put_double, \
  .private_value = left_reg | (right_reg << 8) | (shift_left << 16) | (shift_right << 19) | (mask << 24) | (invert << 22) }

static int snd_es1688_info_double(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
{
	int mask = (kcontrol->private_value >> 24) & 0xff;

	uinfo->type = mask == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
	uinfo->count = 2;
	uinfo->value.integer.min = 0;
	uinfo->value.integer.max = mask;
	return 0;
}

static int snd_es1688_get_double(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
	struct snd_es1688 *chip = snd_kcontrol_chip(kcontrol);
	unsigned long flags;
	int left_reg = kcontrol->private_value & 0xff;
	int right_reg = (kcontrol->private_value >> 8) & 0xff;
	int shift_left = (kcontrol->private_value >> 16) & 0x07;
	int shift_right = (kcontrol->private_value >> 19) & 0x07;
	int mask = (kcontrol->private_value >> 24) & 0xff;
	int invert = (kcontrol->private_value >> 22) & 1;
	unsigned char left, right;
	
	spin_lock_irqsave(&chip->reg_lock, flags);
	if (left_reg < 0xa0)
		left = snd_es1688_mixer_read(chip, left_reg);
	else
		left = snd_es1688_read(chip, left_reg);
	if (left_reg != right_reg) {
		if (right_reg < 0xa0) 
			right = snd_es1688_mixer_read(chip, right_reg);
		else
			right = snd_es1688_read(chip, right_reg);
	} else
		right = left;
	spin_unlock_irqrestore(&chip->reg_lock, flags);
	ucontrol->value.integer.value[0] = (left >> shift_left) & mask;
	ucontrol->value.integer.value[1] = (right >> shift_right) & mask;
	if (invert) {
		ucontrol->value.integer.value[0] = mask - ucontrol->value.integer.value[0];
		ucontrol->value.integer.value[1] = mask - ucontrol->value.integer.value[1];
	}
	return 0;
}

static int snd_es1688_put_double(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
	struct snd_es1688 *chip = snd_kcontrol_chip(kcontrol);
	unsigned long flags;
	int left_reg = kcontrol->private_value & 0xff;
	int right_reg = (kcontrol->private_value >> 8) & 0xff;
	int shift_left = (kcontrol->private_value >> 16) & 0x07;
	int shift_right = (kcontrol->private_value >> 19) & 0x07;
	int mask = (kcontrol->private_value >> 24) & 0xff;
	int invert = (kcontrol->private_value >> 22) & 1;
	int change;
	unsigned char val1, val2, oval1, oval2;
	
	val1 = ucontrol->value.integer.value[0] & mask;
	val2 = ucontrol->value.integer.value[1] & mask;
	if (invert) {
		val1 = mask - val1;
		val2 = mask - val2;
	}
	val1 <<= shift_left;
	val2 <<= shift_right;
	spin_lock_irqsave(&chip->reg_lock, flags);
	if (left_reg != right_reg) {
		if (left_reg < 0xa0)
			oval1 = snd_es1688_mixer_read(chip, left_reg);
		else
			oval1 = snd_es1688_read(chip, left_reg);
		if (right_reg < 0xa0)
			oval2 = snd_es1688_mixer_read(chip, right_reg);
		else
			oval2 = snd_es1688_read(chip, right_reg);
		val1 = (oval1 & ~(mask << shift_left)) | val1;
		val2 = (oval2 & ~(mask << shift_right)) | val2;
		change = val1 != oval1 || val2 != oval2;
		if (change) {
			if (left_reg < 0xa0)
				snd_es1688_mixer_write(chip, left_reg, val1);
			else
				snd_es1688_write(chip, left_reg, val1);
			if (right_reg < 0xa0)
				snd_es1688_mixer_write(chip, right_reg, val1);
			else
				snd_es1688_write(chip, right_reg, val1);
		}
	} else {
		if (left_reg < 0xa0)
			oval1 = snd_es1688_mixer_read(chip, left_reg);
		else
			oval1 = snd_es1688_read(chip, left_reg);
		val1 = (oval1 & ~((mask << shift_left) | (mask << shift_right))) | val1 | val2;
		change = val1 != oval1;
		if (change) {
			if (left_reg < 0xa0)
				snd_es1688_mixer_write(chip, left_reg, val1);
			else
				snd_es1688_write(chip, left_reg, val1);
		}
			
	}
	spin_unlock_irqrestore(&chip->reg_lock, flags);
	return change;
}

static struct snd_kcontrol_new snd_es1688_controls[] = {
ES1688_DOUBLE("Master Playback Volume", 0, ES1688_MASTER_DEV, ES1688_MASTER_DEV, 4, 0, 15, 0),
ES1688_DOUBLE("PCM Playback Volume", 0, ES1688_PCM_DEV, ES1688_PCM_DEV, 4, 0, 15, 0),
ES1688_DOUBLE("Line Playback Volume", 0, ES1688_LINE_DEV, ES1688_LINE_DEV, 4, 0, 15, 0),
ES1688_DOUBLE("CD Playback Volume", 0, ES1688_CD_DEV, ES1688_CD_DEV, 4, 0, 15, 0),
ES1688_DOUBLE("FM Playback Volume", 0, ES1688_FM_DEV, ES1688_FM_DEV, 4, 0, 15, 0),
ES1688_DOUBLE("Mic Playback Volume", 0, ES1688_MIC_DEV, ES1688_MIC_DEV, 4, 0, 15, 0),
ES1688_DOUBLE("Aux Playback Volume", 0, ES1688_AUX_DEV, ES1688_AUX_DEV, 4, 0, 15, 0),
ES1688_SINGLE("Beep Playback Volume", 0, ES1688_SPEAKER_DEV, 0, 7, 0),
ES1688_DOUBLE("Capture Volume", 0, ES1688_RECLEV_DEV, ES1688_RECLEV_DEV, 4, 0, 15, 0),
ES1688_SINGLE("Capture Switch", 0, ES1688_REC_DEV, 4, 1, 1),
{
	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
	.name = "Capture Source",
	.info = snd_es1688_info_mux,
	.get = snd_es1688_get_mux,
	.put = snd_es1688_put_mux,
},
};

#define ES1688_INIT_TABLE_SIZE (sizeof(snd_es1688_init_table)/2)

static unsigned char snd_es1688_init_table[][2] = {
	{ ES1688_MASTER_DEV, 0 },
	{ ES1688_PCM_DEV, 0 },
	{ ES1688_LINE_DEV, 0 },
	{ ES1688_CD_DEV, 0 },
	{ ES1688_FM_DEV, 0 },
	{ ES1688_MIC_DEV, 0 },
	{ ES1688_AUX_DEV, 0 },
	{ ES1688_SPEAKER_DEV, 0 },
	{ ES1688_RECLEV_DEV, 0 },
	{ ES1688_REC_DEV, 0x17 }
};
                                        
int snd_es1688_mixer(struct snd_card *card, struct snd_es1688 *chip)
{
	unsigned int idx;
	int err;
	unsigned char reg, val;

	if (snd_BUG_ON(!chip || !card))
		return -EINVAL;

	strcpy(card->mixername, snd_es1688_chip_id(chip));

	for (idx = 0; idx < ARRAY_SIZE(snd_es1688_controls); idx++) {
		if ((err = snd_ctl_add(card, snd_ctl_new1(&snd_es1688_controls[idx], chip))) < 0)
			return err;
	}
	for (idx = 0; idx < ES1688_INIT_TABLE_SIZE; idx++) {
		reg = snd_es1688_init_table[idx][0];
		val = snd_es1688_init_table[idx][1];
		if (reg < 0xa0)
			snd_es1688_mixer_write(chip, reg, val);
		else
			snd_es1688_write(chip, reg, val);
	}
	return 0;
}

EXPORT_SYMBOL(snd_es1688_mixer_write);
EXPORT_SYMBOL(snd_es1688_create);
EXPORT_SYMBOL(snd_es1688_pcm);
EXPORT_SYMBOL(snd_es1688_mixer);

/*
 *  INIT part
 */

static int __init alsa_es1688_init(void)
{
	return 0;
}

static void __exit alsa_es1688_exit(void)
{
}

module_init(alsa_es1688_init)
module_exit(alsa_es1688_exit)