summaryrefslogtreecommitdiffstats
path: root/sound/ppc/pmac.c
blob: 4f9b19c90a430036ee834120b2b6c0d91e0c2454 (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
/*
 * PMac DBDMA lowlevel functions
 *
 * Copyright (c) by Takashi Iwai <tiwai@suse.de>
 * code based on dmasound.c.
 *
 *   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 <sound/driver.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/dma-mapping.h>
#include <sound/core.h>
#include "pmac.h"
#include <sound/pcm_params.h>
#include <asm/pmac_feature.h>
#include <asm/pci-bridge.h>


/* fixed frequency table for awacs, screamer, burgundy, DACA (44100 max) */
static int awacs_freqs[8] = {
	44100, 29400, 22050, 17640, 14700, 11025, 8820, 7350
};
/* fixed frequency table for tumbler */
static int tumbler_freqs[1] = {
	44100
};

/*
 * allocate DBDMA command arrays
 */
static int snd_pmac_dbdma_alloc(struct snd_pmac *chip, struct pmac_dbdma *rec, int size)
{
	unsigned int rsize = sizeof(struct dbdma_cmd) * (size + 1);

	rec->space = dma_alloc_coherent(&chip->pdev->dev, rsize,
					&rec->dma_base, GFP_KERNEL);
	if (rec->space == NULL)
		return -ENOMEM;
	rec->size = size;
	memset(rec->space, 0, rsize);
	rec->cmds = (void __iomem *)DBDMA_ALIGN(rec->space);
	rec->addr = rec->dma_base + (unsigned long)((char *)rec->cmds - (char *)rec->space);

	return 0;
}

static void snd_pmac_dbdma_free(struct snd_pmac *chip, struct pmac_dbdma *rec)
{
	if (rec->space) {
		unsigned int rsize = sizeof(struct dbdma_cmd) * (rec->size + 1);

		dma_free_coherent(&chip->pdev->dev, rsize, rec->space, rec->dma_base);
	}
}


/*
 * pcm stuff
 */

/*
 * look up frequency table
 */

unsigned int snd_pmac_rate_index(struct snd_pmac *chip, struct pmac_stream *rec, unsigned int rate)
{
	int i, ok, found;

	ok = rec->cur_freqs;
	if (rate > chip->freq_table[0])
		return 0;
	found = 0;
	for (i = 0; i < chip->num_freqs; i++, ok >>= 1) {
		if (! (ok & 1)) continue;
		found = i;
		if (rate >= chip->freq_table[i])
			break;
	}
	return found;
}

/*
 * check whether another stream is active
 */
static inline int another_stream(int stream)
{
	return (stream == SNDRV_PCM_STREAM_PLAYBACK) ?
		SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
}

/*
 * allocate buffers
 */
static int snd_pmac_pcm_hw_params(struct snd_pcm_substream *subs,
				  struct snd_pcm_hw_params *hw_params)
{
	return snd_pcm_lib_malloc_pages(subs, params_buffer_bytes(hw_params));
}

/*
 * release buffers
 */
static int snd_pmac_pcm_hw_free(struct snd_pcm_substream *subs)
{
	snd_pcm_lib_free_pages(subs);
	return 0;
}

/*
 * get a stream of the opposite direction
 */
static struct pmac_stream *snd_pmac_get_stream(struct snd_pmac *chip, int stream)
{
	switch (stream) {
	case SNDRV_PCM_STREAM_PLAYBACK:
		return &chip->playback;
	case SNDRV_PCM_STREAM_CAPTURE:
		return &chip->capture;
	default:
		snd_BUG();
		return NULL;
	}
}

/*
 * wait while run status is on
 */
static inline void
snd_pmac_wait_ack(struct pmac_stream *rec)
{
	int timeout = 50000;
	while ((in_le32(&rec->dma->status) & RUN) && timeout-- > 0)
		udelay(1);
}

/*
 * set the format and rate to the chip.
 * call the lowlevel function if defined (e.g. for AWACS).
 */
static void snd_pmac_pcm_set_format(struct snd_pmac *chip)
{
	/* set up frequency and format */
	out_le32(&chip->awacs->control, chip->control_mask | (chip->rate_index << 8));
	out_le32(&chip->awacs->byteswap, chip->format == SNDRV_PCM_FORMAT_S16_LE ? 1 : 0);
	if (chip->set_format)
		chip->set_format(chip);
}

/*
 * stop the DMA transfer
 */
static inline void snd_pmac_dma_stop(struct pmac_stream *rec)
{
	out_le32(&rec->dma->control, (RUN|WAKE|FLUSH|PAUSE) << 16);
	snd_pmac_wait_ack(rec);
}

/*
 * set the command pointer address
 */
static inline void snd_pmac_dma_set_command(struct pmac_stream *rec, struct pmac_dbdma *cmd)
{
	out_le32(&rec->dma->cmdptr, cmd->addr);
}

/*
 * start the DMA
 */
static inline void snd_pmac_dma_run(struct pmac_stream *rec, int status)
{
	out_le32(&rec->dma->control, status | (status << 16));
}


/*
 * prepare playback/capture stream
 */
static int snd_pmac_pcm_prepare(struct snd_pmac *chip, struct pmac_stream *rec, struct snd_pcm_substream *subs)
{
	int i;
	volatile struct dbdma_cmd __iomem *cp;
	struct snd_pcm_runtime *runtime = subs->runtime;
	int rate_index;
	long offset;
	struct pmac_stream *astr;
	
	rec->dma_size = snd_pcm_lib_buffer_bytes(subs);
	rec->period_size = snd_pcm_lib_period_bytes(subs);
	rec->nperiods = rec->dma_size / rec->period_size;
	rec->cur_period = 0;
	rate_index = snd_pmac_rate_index(chip, rec, runtime->rate);

	/* set up constraints */
	astr = snd_pmac_get_stream(chip, another_stream(rec->stream));
	if (! astr)
		return -EINVAL;
	astr->cur_freqs = 1 << rate_index;
	astr->cur_formats = 1 << runtime->format;
	chip->rate_index = rate_index;
	chip->format = runtime->format;

	/* We really want to execute a DMA stop command, after the AWACS
	 * is initialized.
	 * For reasons I don't understand, it stops the hissing noise
	 * common to many PowerBook G3 systems and random noise otherwise
	 * captured on iBook2's about every third time. -ReneR
	 */
	spin_lock_irq(&chip->reg_lock);
	snd_pmac_dma_stop(rec);
	st_le16(&chip->extra_dma.cmds->command, DBDMA_STOP);
	snd_pmac_dma_set_command(rec, &chip->extra_dma);
	snd_pmac_dma_run(rec, RUN);
	spin_unlock_irq(&chip->reg_lock);
	mdelay(5);
	spin_lock_irq(&chip->reg_lock);
	/* continuous DMA memory type doesn't provide the physical address,
	 * so we need to resolve the address here...
	 */
	offset = runtime->dma_addr;
	for (i = 0, cp = rec->cmd.cmds; i < rec->nperiods; i++, cp++) {
		st_le32(&cp->phy_addr, offset);
		st_le16(&cp->req_count, rec->period_size);
		/*st_le16(&cp->res_count, 0);*/
		st_le16(&cp->xfer_status, 0);
		offset += rec->period_size;
	}
	/* make loop */
	st_le16(&cp->command, DBDMA_NOP + BR_ALWAYS);
	st_le32(&cp->cmd_dep, rec->cmd.addr);

	snd_pmac_dma_stop(rec);
	snd_pmac_dma_set_command(rec, &rec->cmd);
	spin_unlock_irq(&chip->reg_lock);

	return 0;
}


/*
 * PCM trigger/stop
 */
static int snd_pmac_pcm_trigger(struct snd_pmac *chip, struct pmac_stream *rec,
				struct snd_pcm_substream *subs, int cmd)
{
	volatile struct dbdma_cmd __iomem *cp;
	int i, command;

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
	case SNDRV_PCM_TRIGGER_RESUME:
		if (rec->running)
			return -EBUSY;
		command = (subs->stream == SNDRV_PCM_STREAM_PLAYBACK ?
			   OUTPUT_MORE : INPUT_MORE) + INTR_ALWAYS;
		spin_lock(&chip->reg_lock);
		snd_pmac_beep_stop(chip);
		snd_pmac_pcm_set_format(chip);
		for (i = 0, cp = rec->cmd.cmds; i < rec->nperiods; i++, cp++)
			out_le16(&cp->command, command);
		snd_pmac_dma_set_command(rec, &rec->cmd);
		(void)in_le32(&rec->dma->status);
		snd_pmac_dma_run(rec, RUN|WAKE);
		rec->running = 1;
		spin_unlock(&chip->reg_lock);
		break;

	case SNDRV_PCM_TRIGGER_STOP:
	case SNDRV_PCM_TRIGGER_SUSPEND:
		spin_lock(&chip->reg_lock);
		rec->running = 0;
		/*printk("stopped!!\n");*/
		snd_pmac_dma_stop(rec);
		for (i = 0, cp = rec->cmd.cmds; i < rec->nperiods; i++, cp++)
			out_le16(&cp->command, DBDMA_STOP);
		spin_unlock(&chip->reg_lock);
		break;

	default:
		return -EINVAL;
	}

	return 0;
}

/*
 * return the current pointer
 */
inline
static snd_pcm_uframes_t snd_pmac_pcm_pointer(struct snd_pmac *chip,
					      struct pmac_stream *rec,
					      struct snd_pcm_substream *subs)
{
	int count = 0;

#if 1 /* hmm.. how can we get the current dma pointer?? */
	int stat;
	volatile struct dbdma_cmd __iomem *cp = &rec->cmd.cmds[rec->cur_period];
	stat = ld_le16(&cp->xfer_status);
	if (stat & (ACTIVE|DEAD)) {
		count = in_le16(&cp->res_count);
		if (count)
			count = rec->period_size - count;
	}
#endif
	count += rec->cur_period * rec->period_size;
	/*printk("pointer=%d\n", count);*/
	return bytes_to_frames(subs->runtime, count);
}

/*
 * playback
 */

static int snd_pmac_playback_prepare(struct snd_pcm_substream *subs)
{
	struct snd_pmac *chip = snd_pcm_substream_chip(subs);
	return snd_pmac_pcm_prepare(chip, &chip->playback, subs);
}

static int snd_pmac_playback_trigger(struct snd_pcm_substream *subs,
				     int cmd)
{
	struct snd_pmac *chip = snd_pcm_substream_chip(subs);
	return snd_pmac_pcm_trigger(chip, &chip->playback, subs, cmd);
}

static snd_pcm_uframes_t snd_pmac_playback_pointer(struct snd_pcm_substream *subs)
{
	struct snd_pmac *chip = snd_pcm_substream_chip(subs);
	return snd_pmac_pcm_pointer(chip, &chip->playback, subs);
}


/*
 * capture
 */

static int snd_pmac_capture_prepare(struct snd_pcm_substream *subs)
{
	struct snd_pmac *chip = snd_pcm_substream_chip(subs);
	return snd_pmac_pcm_prepare(chip, &chip->capture, subs);
}

static int snd_pmac_capture_trigger(struct snd_pcm_substream *subs,
				    int cmd)
{
	struct snd_pmac *chip = snd_pcm_substream_chip(subs);
	return snd_pmac_pcm_trigger(chip, &chip->capture, subs, cmd);
}

static snd_pcm_uframes_t snd_pmac_capture_pointer(struct snd_pcm_substream *subs)
{
	struct snd_pmac *chip = snd_pcm_substream_chip(subs);
	return snd_pmac_pcm_pointer(chip, &chip->capture, subs);
}


/*
 * update playback/capture pointer from interrupts
 */
static void snd_pmac_pcm_update(struct snd_pmac *chip, struct pmac_stream *rec)
{
	volatile struct dbdma_cmd __iomem *cp;
	int c;
	int stat;

	spin_lock(&chip->reg_lock);
	if (rec->running) {
		cp = &rec->cmd.cmds[rec->cur_period];
		for (c = 0; c < rec->nperiods; c++) { /* at most all fragments */
			stat = ld_le16(&cp->xfer_status);
			if (! (stat & ACTIVE))
				break;
			/*printk("update frag %d\n", rec->cur_period);*/
			st_le16(&cp->xfer_status, 0);
			st_le16(&cp->req_count, rec->period_size);
			/*st_le16(&cp->res_count, 0);*/
			rec->cur_period++;
			if (rec->cur_period >= rec->nperiods) {
				rec->cur_period = 0;
				cp = rec->cmd.cmds;
			} else
				cp++;
			spin_unlock(&chip->reg_lock);
			snd_pcm_period_elapsed(rec->substream);
			spin_lock(&chip->reg_lock);
		}
	}
	spin_unlock(&chip->reg_lock);
}


/*
 * hw info
 */

static struct snd_pcm_hardware snd_pmac_playback =
{
	.info =			(SNDRV_PCM_INFO_INTERLEAVED |
				 SNDRV_PCM_INFO_MMAP |
				 SNDRV_PCM_INFO_MMAP_VALID |
				 SNDRV_PCM_INFO_RESUME),
	.formats =		SNDRV_PCM_FMTBIT_S16_BE | SNDRV_PCM_FMTBIT_S16_LE,
	.rates =		SNDRV_PCM_RATE_8000_44100,
	.rate_min =		7350,
	.rate_max =		44100,
	.channels_min =		2,
	.channels_max =		2,
	.buffer_bytes_max =	131072,
	.period_bytes_min =	256,
	.period_bytes_max =	16384,
	.periods_min =		3,
	.periods_max =		PMAC_MAX_FRAGS,
};

static struct snd_pcm_hardware snd_pmac_capture =
{
	.info =			(SNDRV_PCM_INFO_INTERLEAVED |
				 SNDRV_PCM_INFO_MMAP |
				 SNDRV_PCM_INFO_MMAP_VALID |
				 SNDRV_PCM_INFO_RESUME),
	.formats =		SNDRV_PCM_FMTBIT_S16_BE | SNDRV_PCM_FMTBIT_S16_LE,
	.rates =		SNDRV_PCM_RATE_8000_44100,
	.rate_min =		7350,
	.rate_max =		44100,
	.channels_min =		2,
	.channels_max =		2,
	.buffer_bytes_max =	131072,
	.period_bytes_min =	256,
	.period_bytes_max =	16384,
	.periods_min =		3,
	.periods_max =		PMAC_MAX_FRAGS,
};


#if 0 // NYI
static int snd_pmac_hw_rule_rate(struct snd_pcm_hw_params *params,
				 struct snd_pcm_hw_rule *rule)
{
	struct snd_pmac *chip = rule->private;
	struct pmac_stream *rec = snd_pmac_get_stream(chip, rule->deps[0]);
	int i, freq_table[8], num_freqs;

	if (! rec)
		return -EINVAL;
	num_freqs = 0;
	for (i = chip->num_freqs - 1; i >= 0; i--) {
		if (rec->cur_freqs & (1 << i))
			freq_table[num_freqs++] = chip->freq_table[i];
	}

	return snd_interval_list(hw_param_interval(params, rule->var),
				 num_freqs, freq_table, 0);
}

static int snd_pmac_hw_rule_format(struct snd_pcm_hw_params *params,
				   struct snd_pcm_hw_rule *rule)
{
	struct snd_pmac *chip = rule->private;
	struct pmac_stream *rec = snd_pmac_get_stream(chip, rule->deps[0]);

	if (! rec)
		return -EINVAL;
	return snd_mask_refine_set(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT),
				   rec->cur_formats);
}
#endif // NYI

static int snd_pmac_pcm_open(struct snd_pmac *chip, struct pmac_stream *rec,
			     struct snd_pcm_substream *subs)
{
	struct snd_pcm_runtime *runtime = subs->runtime;
	int i;

	/* look up frequency table and fill bit mask */
	runtime->hw.rates = 0;
	for (i = 0; i < chip->num_freqs; i++)
		if (chip->freqs_ok & (1 << i))
			runtime->hw.rates |=
				snd_pcm_rate_to_rate_bit(chip->freq_table[i]);

	/* check for minimum and maximum rates */
	for (i = 0; i < chip->num_freqs; i++) {
		if (chip->freqs_ok & (1 << i)) {
			runtime->hw.rate_max = chip->freq_table[i];
			break;
		}
	}
	for (i = chip->num_freqs - 1; i >= 0; i--) {
		if (chip->freqs_ok & (1 << i)) {
			runtime->hw.rate_min = chip->freq_table[i];
			break;
		}
	}
	runtime->hw.formats = chip->formats_ok;
	if (chip->can_capture) {
		if (! chip->can_duplex)
			runtime->hw.info |= SNDRV_PCM_INFO_HALF_DUPLEX;
		runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
	}
	runtime->private_data = rec;
	rec->substream = subs;

#if 0 /* FIXME: still under development.. */
	snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
			    snd_pmac_hw_rule_rate, chip, rec->stream, -1);
	snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
			    snd_pmac_hw_rule_format, chip, rec->stream, -1);
#endif

	runtime->hw.periods_max = rec->cmd.size - 1;

	/* constraints to fix choppy sound */
	snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
	return 0;
}

static int snd_pmac_pcm_close(struct snd_pmac *chip, struct pmac_stream *rec,
			      struct snd_pcm_substream *subs)
{
	struct pmac_stream *astr;

	snd_pmac_dma_stop(rec);

	astr = snd_pmac_get_stream(chip, another_stream(rec->stream));
	if (! astr)
		return -EINVAL;

	/* reset constraints */
	astr->cur_freqs = chip->freqs_ok;
	astr->cur_formats = chip->formats_ok;
	
	return 0;
}

static int snd_pmac_playback_open(struct snd_pcm_substream *subs)
{
	struct snd_pmac *chip = snd_pcm_substream_chip(subs);

	subs->runtime->hw = snd_pmac_playback;
	return snd_pmac_pcm_open(chip, &chip->playback, subs);
}

static int snd_pmac_capture_open(struct snd_pcm_substream *subs)
{
	struct snd_pmac *chip = snd_pcm_substream_chip(subs);

	subs->runtime->hw = snd_pmac_capture;
	return snd_pmac_pcm_open(chip, &chip->capture, subs);
}

static int snd_pmac_playback_close(struct snd_pcm_substream *subs)
{
	struct snd_pmac *chip = snd_pcm_substream_chip(subs);

	return snd_pmac_pcm_close(chip, &chip->playback, subs);
}

static int snd_pmac_capture_close(struct snd_pcm_substream *subs)
{
	struct snd_pmac *chip = snd_pcm_substream_chip(subs);

	return snd_pmac_pcm_close(chip, &chip->capture, subs);
}

/*
 */

static struct snd_pcm_ops snd_pmac_playback_ops = {
	.open =		snd_pmac_playback_open,
	.close =	snd_pmac_playback_close,
	.ioctl =	snd_pcm_lib_ioctl,
	.hw_params =	snd_pmac_pcm_hw_params,
	.hw_free =	snd_pmac_pcm_hw_free,
	.prepare =	snd_pmac_playback_prepare,
	.trigger =	snd_pmac_playback_trigger,
	.pointer =	snd_pmac_playback_pointer,
};

static struct snd_pcm_ops snd_pmac_capture_ops = {
	.open =		snd_pmac_capture_open,
	.close =	snd_pmac_capture_close,
	.ioctl =	snd_pcm_lib_ioctl,
	.hw_params =	snd_pmac_pcm_hw_params,
	.hw_free =	snd_pmac_pcm_hw_free,
	.prepare =	snd_pmac_capture_prepare,
	.trigger =	snd_pmac_capture_trigger,
	.pointer =	snd_pmac_capture_pointer,
};

int __init snd_pmac_pcm_new(struct snd_pmac *chip)
{
	struct snd_pcm *pcm;
	int err;
	int num_captures = 1;

	if (! chip->can_capture)
		num_captures = 0;
	err = snd_pcm_new(chip->card, chip->card->driver, 0, 1, num_captures, &pcm);
	if (err < 0)
		return err;

	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_pmac_playback_ops);
	if (chip->can_capture)
		snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_pmac_capture_ops);

	pcm->private_data = chip;
	pcm->info_flags = SNDRV_PCM_INFO_JOINT_DUPLEX;
	strcpy(pcm->name, chip->card->shortname);
	chip->pcm = pcm;

	chip->formats_ok = SNDRV_PCM_FMTBIT_S16_BE;
	if (chip->can_byte_swap)
		chip->formats_ok |= SNDRV_PCM_FMTBIT_S16_LE;

	chip->playback.cur_formats = chip->formats_ok;
	chip->capture.cur_formats = chip->formats_ok;
	chip->playback.cur_freqs = chip->freqs_ok;
	chip->capture.cur_freqs = chip->freqs_ok;

	/* preallocate 64k buffer */
	snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
					      &chip->pdev->dev,
					      64 * 1024, 64 * 1024);

	return 0;
}


static void snd_pmac_dbdma_reset(struct snd_pmac *chip)
{
	out_le32(&chip->playback.dma->control, (RUN|PAUSE|FLUSH|WAKE|DEAD) << 16);
	snd_pmac_wait_ack(&chip->playback);
	out_le32(&chip->capture.dma->control, (RUN|PAUSE|FLUSH|WAKE|DEAD) << 16);
	snd_pmac_wait_ack(&chip->capture);
}


/*
 * handling beep
 */
void snd_pmac_beep_dma_start(struct snd_pmac *chip, int bytes, unsigned long addr, int speed)
{
	struct pmac_stream *rec = &chip->playback;

	snd_pmac_dma_stop(rec);
	st_le16(&chip->extra_dma.cmds->req_count, bytes);
	st_le16(&chip->extra_dma.cmds->xfer_status, 0);
	st_le32(&chip->extra_dma.cmds->cmd_dep, chip->extra_dma.addr);
	st_le32(&chip->extra_dma.cmds->phy_addr, addr);
	st_le16(&chip->extra_dma.cmds->command, OUTPUT_MORE + BR_ALWAYS);
	out_le32(&chip->awacs->control,
		 (in_le32(&chip->awacs->control) & ~0x1f00)
		 | (speed << 8));
	out_le32(&chip->awacs->byteswap, 0);
	snd_pmac_dma_set_command(rec, &chip->extra_dma);
	snd_pmac_dma_run(rec, RUN);
}

void snd_pmac_beep_dma_stop(struct snd_pmac *chip)
{
	snd_pmac_dma_stop(&chip->playback);
	st_le16(&chip->extra_dma.cmds->command, DBDMA_STOP);
	snd_pmac_pcm_set_format(chip); /* reset format */
}


/*
 * interrupt handlers
 */
static irqreturn_t
snd_pmac_tx_intr(int irq, void *devid)
{
	struct snd_pmac *chip = devid;
	snd_pmac_pcm_update(chip, &chip->playback);
	return IRQ_HANDLED;
}


static irqreturn_t
snd_pmac_rx_intr(int irq, void *devid)
{
	struct snd_pmac *chip = devid;
	snd_pmac_pcm_update(chip, &chip->capture);
	return IRQ_HANDLED;
}


static irqreturn_t
snd_pmac_ctrl_intr(int irq, void *devid)
{
	struct snd_pmac *chip = devid;
	int ctrl = in_le32(&chip->awacs->control);

	/*printk("pmac: control interrupt.. 0x%x\n", ctrl);*/
	if (ctrl & MASK_PORTCHG) {
		/* do something when headphone is plugged/unplugged? */
		if (chip->update_automute)
			chip->update_automute(chip, 1);
	}
	if (ctrl & MASK_CNTLERR) {
		int err = (in_le32(&chip->awacs->codec_stat) & MASK_ERRCODE) >> 16;
		if (err && chip->model <= PMAC_SCREAMER)
			snd_printk(KERN_DEBUG "error %x\n", err);
	}
	/* Writing 1s to the CNTLERR and PORTCHG bits clears them... */
	out_le32(&chip->awacs->control, ctrl);
	return IRQ_HANDLED;
}


/*
 * a wrapper to feature call for compatibility
 */
static void snd_pmac_sound_feature(struct snd_pmac *chip, int enable)
{
	if (ppc_md.feature_call)
		ppc_md.feature_call(PMAC_FTR_SOUND_CHIP_ENABLE, chip->node, 0, enable);
}

/*
 * release resources
 */

static int snd_pmac_free(struct snd_pmac *chip)
{
	/* stop sounds */
	if (chip->initialized) {
		snd_pmac_dbdma_reset(chip);
		/* disable interrupts from awacs interface */
		out_le32(&chip->awacs->control, in_le32(&chip->awacs->control) & 0xfff);
	}

	if (chip->node)
		snd_pmac_sound_feature(chip, 0);

	/* clean up mixer if any */
	if (chip->mixer_free)
		chip->mixer_free(chip);

	snd_pmac_detach_beep(chip);

	/* release resources */
	if (chip->irq >= 0)
		free_irq(chip->irq, (void*)chip);
	if (chip->tx_irq >= 0)
		free_irq(chip->tx_irq, (void*)chip);
	if (chip->rx_irq >= 0)
		free_irq(chip->rx_irq, (void*)chip);
	snd_pmac_dbdma_free(chip, &chip->playback.cmd);
	snd_pmac_dbdma_free(chip, &chip->capture.cmd);
	snd_pmac_dbdma_free(chip, &chip->extra_dma);
	if (chip->macio_base)
		iounmap(chip->macio_base);
	if (chip->latch_base)
		iounmap(chip->latch_base);
	if (chip->awacs)
		iounmap(chip->awacs);
	if (chip->playback.dma)
		iounmap(chip->playback.dma);
	if (chip->capture.dma)
		iounmap(chip->capture.dma);

	if (chip->node) {
		int i;
		for (i = 0; i < 3; i++) {
			if (chip->requested & (1 << i))
				release_mem_region(chip->rsrc[i].start,
						   chip->rsrc[i].end -
						   chip->rsrc[i].start + 1);
		}
	}

	if (chip->pdev)
		pci_dev_put(chip->pdev);
	of_node_put(chip->node);
	kfree(chip);
	return 0;
}


/*
 * free the device
 */
static int snd_pmac_dev_free(struct snd_device *device)
{
	struct snd_pmac *chip = device->device_data;
	return snd_pmac_free(chip);
}


/*
 * check the machine support byteswap (little-endian)
 */

static void __init detect_byte_swap(struct snd_pmac *chip)
{
	struct device_node *mio;

	/* if seems that Keylargo can't byte-swap  */
	for (mio = chip->node->parent; mio; mio = mio->parent) {
		if (strcmp(mio->name, "mac-io") == 0) {
			if (of_device_is_compatible(mio, "Keylargo"))
				chip->can_byte_swap = 0;
			break;
		}
	}

	/* it seems the Pismo & iBook can't byte-swap in hardware. */
	if (machine_is_compatible("PowerBook3,1") ||
	    machine_is_compatible("PowerBook2,1"))
		chip->can_byte_swap = 0 ;

	if (machine_is_compatible("PowerBook2,1"))
		chip->can_duplex = 0;
}


/*
 * detect a sound chip
 */
static int __init snd_pmac_detect(struct snd_pmac *chip)
{
	struct device_node *sound;
	struct device_node *dn;
	const unsigned int *prop;
	unsigned int l;
	struct macio_chip* macio;

	if (!machine_is(powermac))
		return -ENODEV;

	chip->subframe = 0;
	chip->revision = 0;
	chip->freqs_ok = 0xff; /* all ok */
	chip->model = PMAC_AWACS;
	chip->can_byte_swap = 1;
	chip->can_duplex = 1;
	chip->can_capture = 1;
	chip->num_freqs = ARRAY_SIZE(awacs_freqs);
	chip->freq_table = awacs_freqs;
	chip->pdev = NULL;

	chip->control_mask = MASK_IEPC | MASK_IEE | 0x11; /* default */

	/* check machine type */
	if (machine_is_compatible("AAPL,3400/2400")
	    || machine_is_compatible("AAPL,3500"))
		chip->is_pbook_3400 = 1;
	else if (machine_is_compatible("PowerBook1,1")
		 || machine_is_compatible("AAPL,PowerBook1998"))
		chip->is_pbook_G3 = 1;
	chip->node = of_find_node_by_name(NULL, "awacs");
	sound = of_node_get(chip->node);

	/*
	 * powermac G3 models have a node called "davbus"
	 * with a child called "sound".
	 */
	if (!chip->node)
		chip->node = of_find_node_by_name(NULL, "davbus");
	/*
	 * if we didn't find a davbus device, try 'i2s-a' since
	 * this seems to be what iBooks have
	 */
	if (! chip->node) {
		chip->node = of_find_node_by_name(NULL, "i2s-a");
		if (chip->node && chip->node->parent &&
		    chip->node->parent->parent) {
			if (of_device_is_compatible(chip->node->parent->parent,
						 "K2-Keylargo"))
				chip->is_k2 = 1;
		}
	}
	if (! chip->node)
		return -ENODEV;

	if (!sound) {
		sound = of_find_node_by_name(NULL, "sound");
		while (sound && sound->parent != chip->node)
			sound = of_find_node_by_name(sound, "sound");
	}
	if (! sound) {
		of_node_put(chip->node);
		chip->node = NULL;
		return -ENODEV;
	}
	prop = of_get_property(sound, "sub-frame", NULL);
	if (prop && *prop < 16)
		chip->subframe = *prop;
	prop = of_get_property(sound, "layout-id", NULL);
	if (prop) {
		/* partly deprecate snd-powermac, for those machines
		 * that have a layout-id property for now */
		printk(KERN_INFO "snd-powermac no longer handles any "
				 "machines with a layout-id property "
				 "in the device-tree, use snd-aoa.\n");
		of_node_put(sound);
		of_node_put(chip->node);
		chip->node = NULL;
		return -ENODEV;
	}
	/* This should be verified on older screamers */
	if (of_device_is_compatible(sound, "screamer")) {
		chip->model = PMAC_SCREAMER;
		// chip->can_byte_swap = 0; /* FIXME: check this */
	}
	if (of_device_is_compatible(sound, "burgundy")) {
		chip->model = PMAC_BURGUNDY;
		chip->control_mask = MASK_IEPC | 0x11; /* disable IEE */
	}
	if (of_device_is_compatible(sound, "daca")) {
		chip->model = PMAC_DACA;
		chip->can_capture = 0;  /* no capture */
		chip->can_duplex = 0;
		// chip->can_byte_swap = 0; /* FIXME: check this */
		chip->control_mask = MASK_IEPC | 0x11; /* disable IEE */
	}
	if (of_device_is_compatible(sound, "tumbler")) {
		chip->model = PMAC_TUMBLER;
		chip->can_capture = 0;  /* no capture */
		chip->can_duplex = 0;
		// chip->can_byte_swap = 0; /* FIXME: check this */
		chip->num_freqs = ARRAY_SIZE(tumbler_freqs);
		chip->freq_table = tumbler_freqs;
		chip->control_mask = MASK_IEPC | 0x11; /* disable IEE */
	}
	if (of_device_is_compatible(sound, "snapper")) {
		chip->model = PMAC_SNAPPER;
		// chip->can_byte_swap = 0; /* FIXME: check this */
		chip->num_freqs = ARRAY_SIZE(tumbler_freqs);
		chip->freq_table = tumbler_freqs;
		chip->control_mask = MASK_IEPC | 0x11; /* disable IEE */
	}
	prop = of_get_property(sound, "device-id", NULL);
	if (prop)
		chip->device_id = *prop;
	dn = of_find_node_by_name(NULL, "perch");
	chip->has_iic = (dn != NULL);
	of_node_put(dn);

	/* We need the PCI device for DMA allocations, let's use a crude method
	 * for now ...
	 */
	macio = macio_find(chip->node, macio_unknown);
	if (macio == NULL)
		printk(KERN_WARNING "snd-powermac: can't locate macio !\n");
	else {
		struct pci_dev *pdev = NULL;

		for_each_pci_dev(pdev) {
			struct device_node *np = pci_device_to_OF_node(pdev);
			if (np && np == macio->of_node) {
				chip->pdev = pdev;
				break;
			}
		}
	}
	if (chip->pdev == NULL)
		printk(KERN_WARNING "snd-powermac: can't locate macio PCI"
		       " device !\n");

	detect_byte_swap(chip);

	/* look for a property saying what sample rates
	   are available */
	prop = of_get_property(sound, "sample-rates", &l);
	if (! prop)
		prop = of_get_property(sound, "output-frame-rates", &l);
	if (prop) {
		int i;
		chip->freqs_ok = 0;
		for (l /= sizeof(int); l > 0; --l) {
			unsigned int r = *prop++;
			/* Apple 'Fixed' format */
			if (r >= 0x10000)
				r >>= 16;
			for (i = 0; i < chip->num_freqs; ++i) {
				if (r == chip->freq_table[i]) {
					chip->freqs_ok |= (1 << i);
					break;
				}
			}
		}
	} else {
		/* assume only 44.1khz */
		chip->freqs_ok = 1;
	}

	of_node_put(sound);
	return 0;
}

#ifdef PMAC_SUPPORT_AUTOMUTE
/*
 * auto-mute
 */
static int pmac_auto_mute_get(struct snd_kcontrol *kcontrol,
			      struct snd_ctl_elem_value *ucontrol)
{
	struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
	ucontrol->value.integer.value[0] = chip->auto_mute;
	return 0;
}

static int pmac_auto_mute_put(struct snd_kcontrol *kcontrol,
			      struct snd_ctl_elem_value *ucontrol)
{
	struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
	if (ucontrol->value.integer.value[0] != chip->auto_mute) {
		chip->auto_mute = ucontrol->value.integer.value[0];
		if (chip->update_automute)
			chip->update_automute(chip, 1);
		return 1;
	}
	return 0;
}

static int pmac_hp_detect_get(struct snd_kcontrol *kcontrol,
			      struct snd_ctl_elem_value *ucontrol)
{
	struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
	if (chip->detect_headphone)
		ucontrol->value.integer.value[0] = chip->detect_headphone(chip);
	else
		ucontrol->value.integer.value[0] = 0;
	return 0;
}

static struct snd_kcontrol_new auto_mute_controls[] __initdata = {
	{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
	  .name = "Auto Mute Switch",
	  .info = snd_pmac_boolean_mono_info,
	  .get = pmac_auto_mute_get,
	  .put = pmac_auto_mute_put,
	},
	{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
	  .name = "Headphone Detection",
	  .access = SNDRV_CTL_ELEM_ACCESS_READ,
	  .info = snd_pmac_boolean_mono_info,
	  .get = pmac_hp_detect_get,
	},
};

int __init snd_pmac_add_automute(struct snd_pmac *chip)
{
	int err;
	chip->auto_mute = 1;
	err = snd_ctl_add(chip->card, snd_ctl_new1(&auto_mute_controls[0], chip));
	if (err < 0) {
		printk(KERN_ERR "snd-powermac: Failed to add automute control\n");
		return err;
	}
	chip->hp_detect_ctl = snd_ctl_new1(&auto_mute_controls[1], chip);
	return snd_ctl_add(chip->card, chip->hp_detect_ctl);
}
#endif /* PMAC_SUPPORT_AUTOMUTE */

/*
 * create and detect a pmac chip record
 */
int __init snd_pmac_new(struct snd_card *card, struct snd_pmac **chip_return)
{
	struct snd_pmac *chip;
	struct device_node *np;
	int i, err;
	unsigned int irq;
	unsigned long ctrl_addr, txdma_addr, rxdma_addr;
	static struct snd_device_ops ops = {
		.dev_free =	snd_pmac_dev_free,
	};

	*chip_return = NULL;

	chip = kzalloc(sizeof(*chip), GFP_KERNEL);
	if (chip == NULL)
		return -ENOMEM;
	chip->card = card;

	spin_lock_init(&chip->reg_lock);
	chip->irq = chip->tx_irq = chip->rx_irq = -1;

	chip->playback.stream = SNDRV_PCM_STREAM_PLAYBACK;
	chip->capture.stream = SNDRV_PCM_STREAM_CAPTURE;

	if ((err = snd_pmac_detect(chip)) < 0)
		goto __error;

	if (snd_pmac_dbdma_alloc(chip, &chip->playback.cmd, PMAC_MAX_FRAGS + 1) < 0 ||
	    snd_pmac_dbdma_alloc(chip, &chip->capture.cmd, PMAC_MAX_FRAGS + 1) < 0 ||
	    snd_pmac_dbdma_alloc(chip, &chip->extra_dma, 2) < 0) {
		err = -ENOMEM;
		goto __error;
	}

	np = chip->node;
	chip->requested = 0;
	if (chip->is_k2) {
		static char *rnames[] = {
			"Sound Control", "Sound DMA" };
		for (i = 0; i < 2; i ++) {
			if (of_address_to_resource(np->parent, i,
						   &chip->rsrc[i])) {
				printk(KERN_ERR "snd: can't translate rsrc "
				       " %d (%s)\n", i, rnames[i]);
				err = -ENODEV;
				goto __error;
			}
			if (request_mem_region(chip->rsrc[i].start,
					       chip->rsrc[i].end -
					       chip->rsrc[i].start + 1,
					       rnames[i]) == NULL) {
				printk(KERN_ERR "snd: can't request rsrc "
				       " %d (%s: 0x%016llx:%016llx)\n",
				       i, rnames[i],
				       (unsigned long long)chip->rsrc[i].start,
				       (unsigned long long)chip->rsrc[i].end);
				err = -ENODEV;
				goto __error;
			}
			chip->requested |= (1 << i);
		}
		ctrl_addr = chip->rsrc[0].start;
		txdma_addr = chip->rsrc[1].start;
		rxdma_addr = txdma_addr + 0x100;
	} else {
		static char *rnames[] = {
			"Sound Control", "Sound Tx DMA", "Sound Rx DMA" };
		for (i = 0; i < 3; i ++) {
			if (of_address_to_resource(np, i,
						   &chip->rsrc[i])) {
				printk(KERN_ERR "snd: can't translate rsrc "
				       " %d (%s)\n", i, rnames[i]);
				err = -ENODEV;
				goto __error;
			}
			if (request_mem_region(chip->rsrc[i].start,
					       chip->rsrc[i].end -
					       chip->rsrc[i].start + 1,
					       rnames[i]) == NULL) {
				printk(KERN_ERR "snd: can't request rsrc "
				       " %d (%s: 0x%016llx:%016llx)\n",
				       i, rnames[i],
				       (unsigned long long)chip->rsrc[i].start,
				       (unsigned long long)chip->rsrc[i].end);
				err = -ENODEV;
				goto __error;
			}
			chip->requested |= (1 << i);
		}
		ctrl_addr = chip->rsrc[0].start;
		txdma_addr = chip->rsrc[1].start;
		rxdma_addr = chip->rsrc[2].start;
	}

	chip->awacs = ioremap(ctrl_addr, 0x1000);
	chip->playback.dma = ioremap(txdma_addr, 0x100);
	chip->capture.dma = ioremap(rxdma_addr, 0x100);
	if (chip->model <= PMAC_BURGUNDY) {
		irq = irq_of_parse_and_map(np, 0);
		if (request_irq(irq, snd_pmac_ctrl_intr, 0,
				"PMac", (void*)chip)) {
			snd_printk(KERN_ERR "pmac: unable to grab IRQ %d\n",
				   irq);
			err = -EBUSY;
			goto __error;
		}
		chip->irq = irq;
	}
	irq = irq_of_parse_and_map(np, 1);
	if (request_irq(irq, snd_pmac_tx_intr, 0, "PMac Output", (void*)chip)){
		snd_printk(KERN_ERR "pmac: unable to grab IRQ %d\n", irq);
		err = -EBUSY;
		goto __error;
	}
	chip->tx_irq = irq;
	irq = irq_of_parse_and_map(np, 2);
	if (request_irq(irq, snd_pmac_rx_intr, 0, "PMac Input", (void*)chip)) {
		snd_printk(KERN_ERR "pmac: unable to grab IRQ %d\n", irq);
		err = -EBUSY;
		goto __error;
	}
	chip->rx_irq = irq;

	snd_pmac_sound_feature(chip, 1);

	/* reset */
	if (chip->model == PMAC_AWACS)
		out_le32(&chip->awacs->control, 0x11);

	/* Powerbooks have odd ways of enabling inputs such as
	   an expansion-bay CD or sound from an internal modem
	   or a PC-card modem. */
	if (chip->is_pbook_3400) {
		/* Enable CD and PC-card sound inputs. */
		/* This is done by reading from address
		 * f301a000, + 0x10 to enable the expansion-bay
		 * CD sound input, + 0x80 to enable the PC-card
		 * sound input.  The 0x100 enables the SCSI bus
		 * terminator power.
		 */
		chip->latch_base = ioremap (0xf301a000, 0x1000);
		in_8(chip->latch_base + 0x190);
	} else if (chip->is_pbook_G3) {
		struct device_node* mio;
		for (mio = chip->node->parent; mio; mio = mio->parent) {
			if (strcmp(mio->name, "mac-io") == 0) {
				struct resource r;
				if (of_address_to_resource(mio, 0, &r) == 0)
					chip->macio_base =
						ioremap(r.start, 0x40);
				break;
			}
		}
		/* Enable CD sound input. */
		/* The relevant bits for writing to this byte are 0x8f.
		 * I haven't found out what the 0x80 bit does.
		 * For the 0xf bits, writing 3 or 7 enables the CD
		 * input, any other value disables it.  Values
		 * 1, 3, 5, 7 enable the microphone.  Values 0, 2,
		 * 4, 6, 8 - f enable the input from the modem.
		 */
		if (chip->macio_base)
			out_8(chip->macio_base + 0x37, 3);
	}

	/* Reset dbdma channels */
	snd_pmac_dbdma_reset(chip);

	if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0)
		goto __error;

	*chip_return = chip;
	return 0;

 __error:
	snd_pmac_free(chip);
	return err;
}


/*
 * sleep notify for powerbook
 */

#ifdef CONFIG_PM

/*
 * Save state when going to sleep, restore it afterwards.
 */

void snd_pmac_suspend(struct snd_pmac *chip)
{
	unsigned long flags;

	snd_power_change_state(chip->card, SNDRV_CTL_POWER_D3hot);
	if (chip->suspend)
		chip->suspend(chip);
	snd_pcm_suspend_all(chip->pcm);
	spin_lock_irqsave(&chip->reg_lock, flags);
	snd_pmac_beep_stop(chip);
	spin_unlock_irqrestore(&chip->reg_lock, flags);
	if (chip->irq >= 0)
		disable_irq(chip->irq);
	if (chip->tx_irq >= 0)
		disable_irq(chip->tx_irq);
	if (chip->rx_irq >= 0)
		disable_irq(chip->rx_irq);
	snd_pmac_sound_feature(chip, 0);
}

void snd_pmac_resume(struct snd_pmac *chip)
{
	snd_pmac_sound_feature(chip, 1);
	if (chip->resume)
		chip->resume(chip);
	/* enable CD sound input */
	if (chip->macio_base && chip->is_pbook_G3)
		out_8(chip->macio_base + 0x37, 3);
	else if (chip->is_pbook_3400)
		in_8(chip->latch_base + 0x190);

	snd_pmac_pcm_set_format(chip);

	if (chip->irq >= 0)
		enable_irq(chip->irq);
	if (chip->tx_irq >= 0)
		enable_irq(chip->tx_irq);
	if (chip->rx_irq >= 0)
		enable_irq(chip->rx_irq);

	snd_power_change_state(chip->card, SNDRV_CTL_POWER_D0);
}

#endif /* CONFIG_PM */

OpenPOWER on IntegriCloud