summaryrefslogtreecommitdiffstats
path: root/firmware/mp3_playback.c
blob: 731db172c0a995b0c7ebb7e59c080e718c8f9629 (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
/***************************************************************************
 *             __________               __   ___.
 *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
 *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
 *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
 *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
 *                     \/            \/     \/    \/            \/
 * $Id$
 *
 * Code that has been in mpeg.c before, now creating an encapsulated play
 * data module, to be used by other sources than file playback as well.
 *
 * Copyright (C) 2004 by Linus Nielsen Feltzing
 *
 * All files in this archive are subject to the GNU General Public License.
 * See the file COPYING in the source tree root for full license agreement.
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
 * KIND, either express or implied.
 *
 ****************************************************************************/
#include <stdbool.h>
#include "config.h"
#include "debug.h"
#include "panic.h"
#include <kernel.h>
#include "mpeg.h" /* ToDo: remove crosslinks */
#include "mp3_playback.h"
#include "sound.h"
#ifndef SIMULATOR
#include "i2c.h"
#include "mas.h"
#include "dac.h"
#include "system.h"
#include "hwcompat.h"
#endif

/* hacking into mpeg.c, recording is still there */
#if CONFIG_HWCODEC == MAS3587F
enum
{
    MPEG_DECODER,
    MPEG_ENCODER
} mpeg_mode;
#endif /* #ifdef MAS3587F */

#if (CONFIG_HWCODEC == MAS3587F) || (CONFIG_HWCODEC == MAS3539F)
extern unsigned long shadow_io_control_main;
extern unsigned shadow_codec_reg0;
#endif

/**** globals ****/

/* own version, independent of mpeg.c */
static bool paused; /* playback is paused */
static bool playing; /* We are playing an MP3 stream */

#ifndef SIMULATOR
/* for measuring the play time */
static long playstart_tick;
static long cumulative_ticks;

/* the registered callback function to ask for more mp3 data */
static void (*callback_for_more)(unsigned char**, int*);
#endif /* #ifndef SIMULATOR */

/* list of tracks in memory */
#define MAX_ID3_TAGS (1<<4) /* Must be power of 2 */
#define MAX_ID3_TAGS_MASK (MAX_ID3_TAGS - 1)

#ifndef SIMULATOR
bool audio_is_initialized = false;
#endif

#if CONFIG_HWCODEC != MASNONE
/* FIX: this code pretty much assumes a MAS */

#ifndef SIMULATOR

unsigned long mas_version_code;

#if CONFIG_HWCODEC == MAS3507D
static void mas_poll_start(void)
{
    unsigned int count;

    count = 9 * FREQ / 10000 / 8; /* 0.9 ms */

    /* We are using timer 1 */
    
    TSTR &= ~0x02; /* Stop the timer */
    TSNC &= ~0x02; /* No synchronization */
    TMDR &= ~0x02; /* Operate normally */

    TCNT1 = 0;   /* Start counting at 0 */
    GRA1 = count;
    TCR1 = 0x23; /* Clear at GRA match, sysclock/8 */

    /* Enable interrupt on level 5 */
    IPRC = (IPRC & ~0x000f) | 0x0005;
    
    TSR1 &= ~0x02;
    TIER1 = 0xf9; /* Enable GRA match interrupt */

    TSTR |= 0x02; /* Start timer 1 */
}
#elif CONFIG_HWCODEC != MASNONE
static void postpone_dma_tick(void)
{
    unsigned int count;

    count = 8 * FREQ / 10000 / 8; /* 0.8 ms */

    /* We are using timer 1 */
    
    TSTR &= ~0x02; /* Stop the timer */
    TSNC &= ~0x02; /* No synchronization */
    TMDR &= ~0x02; /* Operate normally */

    TCNT1 = 0;   /* Start counting at 0 */
    GRA1 = count;
    TCR1 = 0x23; /* Clear at GRA match, sysclock/8 */

    /* Enable interrupt on level 5 */
    IPRC = (IPRC & ~0x000f) | 0x0005;
    
    TSR1 &= ~0x02;
    TIER1 = 0xf9; /* Enable GRA match interrupt */

    TSTR |= 0x02; /* Start timer 1 */
}
#endif


#if (CONFIG_HWCODEC == MAS3587F) || (CONFIG_HWCODEC == MAS3539F)
void demand_irq_enable(bool on)
{
    int oldlevel = set_irq_level(HIGHEST_IRQ_LEVEL);
    
    if(on)
    {
        IPRA = (IPRA & 0xfff0) | 0x000b;
        ICR &= ~0x0010; /* IRQ3 level sensitive */
    }
    else
        IPRA &= 0xfff0;

    set_irq_level(oldlevel);
}
#endif /* #if (CONFIG_HWCODEC == MAS3587F) || (CONFIG_HWCODEC == MAS3539F) */


void play_tick(void)
{
    if(playing && !paused)
    {
        /* Start DMA if it is disabled and the DEMAND pin is high */
        if(!(SCR0 & 0x80) && (PBDR & 0x4000))
        {
            SCR0 |= 0x80;
        }

        playback_tick(); /* dirty call to mpeg.c */
    }
}

#pragma interrupt
void DEI3(void)
{
    unsigned char* start;
    int size = 0;

    if (callback_for_more != NULL)
    {
        callback_for_more(&start, &size);
    }
    
    if (size > 0)
    {
        DTCR3 = size & 0xffff;
        SAR3 = (unsigned int) start;
    }
    else
    {
        CHCR3 &= ~0x0001; /* Disable the DMA interrupt */
    }

    CHCR3 &= ~0x0002; /* Clear DMA interrupt */
}

#pragma interrupt
void IMIA1(void) /* Timer 1 interrupt */
{
    if(playing)
        play_tick();
    TSR1 &= ~0x01;
#if (CONFIG_HWCODEC == MAS3587F) || (CONFIG_HWCODEC == MAS3539F)
    /* Disable interrupt */
    IPRC &= ~0x000f;
#endif
}

#pragma interrupt
void IRQ6(void) /* PB14: MAS stop demand IRQ */
{
    SCR0 &= ~0x80;
}

#if (CONFIG_HWCODEC == MAS3587F) || (CONFIG_HWCODEC == MAS3539F)
#pragma interrupt
void IRQ3(void) /* PA15: MAS demand IRQ */
{
    /* Begin with setting the IRQ to edge sensitive */
    ICR |= 0x0010;

#if CONFIG_HWCODEC == MAS3587F
    if(mpeg_mode == MPEG_ENCODER)
        rec_tick();
    else
#endif
        postpone_dma_tick();
}
#endif /* #if (CONFIG_HWCODEC == MAS3587F) || (CONFIG_HWCODEC == MAS3539F) */

static void setup_sci0(void)
{
    /* PB15 is I/O, PB14 is IRQ6, PB12 is SCK0, PB9 is TxD0 */
    PBCR1 = (PBCR1 & 0x0cff) | 0x1208;
    
    /* Set PB12 to output */
    or_b(0x10, &PBIORH);

    /* Disable serial port */
    SCR0 = 0x00;

    /* Synchronous, no prescale */
    SMR0 = 0x80;

    /* Set baudrate 1Mbit/s */
    BRR0 = 0x02;

    /* use SCK as serial clock output */
    SCR0 = 0x01;

    /* Clear FER and PER */
    SSR0 &= 0xe7;

    /* Set interrupt ITU2 and SCI0 priority to 0 */
    IPRD &= 0x0ff0;

    /* set PB15 and PB14 to inputs */
     and_b(~0x80, &PBIORH);
     and_b(~0x40, &PBIORH);

    /* Enable End of DMA interrupt at prio 8 */
    IPRC = (IPRC & 0xf0ff) | 0x0800;
    
    /* Enable Tx (only!) */
    SCR0 |= 0x20;
}
#endif /* SIMULATOR */

#if (CONFIG_HWCODEC == MAS3587F) || (CONFIG_HWCODEC == MAS3539F)
static void init_playback(void)
{
    unsigned long val;
    int rc;

    mp3_play_pause(false);
    
    mas_reset();

    /* Enable the audio CODEC and the DSP core, max analog voltage range */
    rc = mas_direct_config_write(MAS_CONTROL, 0x8c00);
    if(rc < 0)
        panicf("mas_ctrl_w: %d", rc);

    /* Stop the current application */
    val = 0;
    mas_writemem(MAS_BANK_D0, MAS_D0_APP_SELECT, &val, 1);
    do
    {
        mas_readmem(MAS_BANK_D0, MAS_D0_APP_RUNNING, &val, 1);
    } while(val);
    
    /* Enable the D/A Converter */
    shadow_codec_reg0 = 0x0001;
    mas_codec_writereg(0x0, shadow_codec_reg0);

    /* ADC scale 0%, DSP scale 100% */
    mas_codec_writereg(6, 0x0000);
    mas_codec_writereg(7, 0x4000);

#ifdef HAVE_SPDIF_OUT
    val = 0x09; /* Disable SDO and SDI, low impedance S/PDIF outputs */
#else
    val = 0x2d; /* Disable SDO and SDI, disable S/PDIF output */
#endif
    mas_writemem(MAS_BANK_D0, MAS_D0_INTERFACE_CONTROL, &val, 1);

    /* Set Demand mode and validate all settings */
    shadow_io_control_main = 0x25;
    mas_writemem(MAS_BANK_D0, MAS_D0_IO_CONTROL_MAIN, &shadow_io_control_main, 1);

    /* Start the Layer2/3 decoder applications */
    val = 0x0c;
    mas_writemem(MAS_BANK_D0, MAS_D0_APP_SELECT, &val, 1);
    do
    {
        mas_readmem(MAS_BANK_D0, MAS_D0_APP_RUNNING, &val, 1);
    } while((val & 0x0c) != 0x0c);

#if CONFIG_HWCODEC == MAS3587F
    mpeg_mode = MPEG_DECODER;
#endif

    /* set IRQ6 to edge detect */
    ICR |= 0x02;

    /* set IRQ6 prio 8 */
    IPRB = ( IPRB & 0xff0f ) | 0x0080;

    DEBUGF("MAS Decoding application started\n");
}
#endif /* #if (CONFIG_HWCODEC == MAS3587F) || (CONFIG_HWCODEC == MAS3539F) */

void mp3_init(int volume, int bass, int treble, int balance, int loudness,
              int avc, int channel_config, int stereo_width,
              int mdb_strength, int mdb_harmonics,
              int mdb_center, int mdb_shape, bool mdb_enable,
              bool superbass)
{
#ifdef SIMULATOR
    (void)volume;
    (void)bass;
    (void)treble;
    (void)balance;
    (void)loudness;
    (void)avc;
    (void)channel_config;
    (void)stereo_width;
    (void)mdb_strength;
    (void)mdb_harmonics;
    (void)mdb_center;
    (void)mdb_shape;
    (void)mdb_enable;
    (void)superbass;
#else
#if CONFIG_HWCODEC == MAS3507D
    unsigned long val;
    (void)loudness;
    (void)avc;
    (void)mdb_strength;
    (void)mdb_harmonics;
    (void)mdb_center;
    (void)mdb_shape;
    (void)mdb_enable;
    (void)superbass;
#endif

    setup_sci0();

#ifdef HAVE_MAS_SIBI_CONTROL
    and_b(~0x01, &PBDRH); /* drive SIBI low */
    or_b(0x01, &PBIORH); /* output for PB8 */
#endif

#if CONFIG_HWCODEC == MAS3507D
    mas_reset();
#elif CONFIG_HWCODEC == MAS3587F
    or_b(0x08, &PAIORH); /* output for /PR */
    init_playback();
    
    mas_version_code = mas_readver();
    DEBUGF("MAS3587 derivate %d, version %c%d\n",
           (mas_version_code & 0xf000) >> 12,
           'A' + ((mas_version_code & 0x0f00) >> 8), mas_version_code & 0xff);
#elif CONFIG_HWCODEC == MAS3539F
    or_b(0x08, &PAIORH); /* output for /PR */
    init_playback();
    
    mas_version_code = mas_readver();
    DEBUGF("MAS3539 derivate %d, version %c%d\n",
           (mas_version_code & 0xf000) >> 12,
           'A' + ((mas_version_code & 0x0f00) >> 8), mas_version_code & 0xff);
#endif

#ifdef HAVE_DAC3550A
    dac_init();
#endif
    
#if CONFIG_HWCODEC == MAS3507D
    /* set IRQ6 to edge detect */
    ICR |= 0x02;

    /* set IRQ6 prio 8 */
    IPRB = ( IPRB & 0xff0f ) | 0x0080;

    mas_readmem(MAS_BANK_D1, 0xff7, &mas_version_code, 1);
    
    mas_writereg(0x3b, 0x20); /* Don't ask why. The data sheet doesn't say */
    mas_run(1);
    sleep(HZ);

    /* Clear the upper 12 bits of the 32-bit samples */
    mas_writereg(0xc5, 0);
    mas_writereg(0xc6, 0);
    
    /* We need to set the PLL for a 14.31818MHz crystal */
    if(mas_version_code == 0x0601) /* Version F10? */
    {
        val = 0x5d9d0;
        mas_writemem(MAS_BANK_D0, 0x32d, &val, 1);
        val = 0xfffceceb;
        mas_writemem(MAS_BANK_D0, 0x32e, &val, 1);
        val = 0x0;
        mas_writemem(MAS_BANK_D0, 0x32f, &val, 1);
        mas_run(0x475);
    }
    else
    {
        val = 0x5d9d0;
        mas_writemem(MAS_BANK_D0, 0x36d, &val, 1);
        val = 0xfffceceb;
        mas_writemem(MAS_BANK_D0, 0x36e, &val, 1);
        val = 0x0;
        mas_writemem(MAS_BANK_D0, 0x36f, &val, 1);
        mas_run(0xfcb);
    }
    
#endif

#if CONFIG_HWCODEC == MAS3507D
    mas_poll_start();

    mas_writereg(MAS_REG_KPRESCALE, 0xe9400);
    dac_enable(true);
#endif

#if (CONFIG_HWCODEC == MAS3587F) || (CONFIG_HWCODEC == MAS3539F)
    ICR &= ~0x0010; /* IRQ3 level sensitive */
    PACR1 = (PACR1 & 0x3fff) | 0x4000; /* PA15 is IRQ3 */
#endif

    /* Must be done before calling sound_set() */
    audio_is_initialized = true;

    sound_set(SOUND_BASS, bass);
    sound_set(SOUND_TREBLE, treble);
    sound_set(SOUND_BALANCE, balance);
    sound_set(SOUND_VOLUME, volume);
    sound_set(SOUND_CHANNELS, channel_config);
    sound_set(SOUND_STEREO_WIDTH, stereo_width);
    
#if (CONFIG_HWCODEC == MAS3587F) || (CONFIG_HWCODEC == MAS3539F)
    sound_set(SOUND_LOUDNESS, loudness);
    sound_set(SOUND_AVC, avc);
    sound_set(SOUND_MDB_STRENGTH, mdb_strength);
    sound_set(SOUND_MDB_HARMONICS, mdb_harmonics);
    sound_set(SOUND_MDB_CENTER, mdb_center);
    sound_set(SOUND_MDB_SHAPE, mdb_shape);
    sound_set(SOUND_MDB_ENABLE, mdb_enable);
    sound_set(SOUND_SUPERBASS, superbass);
#endif
#endif /* !SIMULATOR */

    playing = false;
    paused = true;
}

void mp3_shutdown(void)
{
#ifndef SIMULATOR
#if (CONFIG_HWCODEC == MAS3587F) || (CONFIG_HWCODEC == MAS3539F)
    unsigned long val = 1;
    mas_writemem(MAS_BANK_D0, MAS_D0_SOFT_MUTE, &val, 1); /* Mute */
#endif

#if CONFIG_HWCODEC == MAS3507D
    dac_volume(0, 0, false);
#endif

#endif
}

/* new functions, to be exported to plugin API */

#ifndef SIMULATOR

void mp3_play_init(void)
{
#if (CONFIG_HWCODEC == MAS3587F) || (CONFIG_HWCODEC == MAS3539F)
    init_playback();
#endif
    playing = false;
    paused = true;
    callback_for_more = NULL;
    mp3_reset_playtime();
}

void mp3_play_data(const unsigned char* start, int size,
    void (*get_more)(unsigned char** start, int* size) /* callback fn */
)
{
    /* init DMA */
    DAR3 = 0x5FFFEC3;
    CHCR3 &= ~0x0002; /* Clear interrupt */
    CHCR3 = 0x1504; /* Single address destination, TXI0, IE=1 */
    DMAOR = 0x0001; /* Enable DMA */
    
    callback_for_more = get_more;

    SAR3 = (unsigned int)start;
    DTCR3 = size & 0xffff;

    playing = true;
    paused = true;

    CHCR3 |= 0x0001; /* Enable DMA IRQ */

#if (CONFIG_HWCODEC == MAS3587F) || (CONFIG_HWCODEC == MAS3539F)
    demand_irq_enable(true);
#endif
}

void mp3_play_pause(bool play)
{
    if (paused && play)
    {   /* resume playback */
        SCR0 |= 0x80;
        paused = false;
        playstart_tick = current_tick;
    }
    else if (!paused && !play)
    {   /* stop playback */
        SCR0 &= 0x7f;
        paused = true;
        cumulative_ticks += current_tick - playstart_tick;
    }
}     

bool mp3_pause_done(void)
{
    unsigned long frame_count;

    if (!paused)
        return false;
    
    mas_readmem(MAS_BANK_D0, MAS_D0_MPEG_FRAME_COUNT, &frame_count, 1);
    /* This works because the frame counter never wraps,
     * i.e. zero always means lost sync. */
    return frame_count == 0;
}

void mp3_play_stop(void)
{
    playing = false;
    mp3_play_pause(false);
    CHCR3 &= ~0x0001; /* Disable the DMA interrupt */
#if (CONFIG_HWCODEC == MAS3587F) || (CONFIG_HWCODEC == MAS3539F)
    demand_irq_enable(false);
#endif
}

long mp3_get_playtime(void)
{
    if (paused)
        return cumulative_ticks;
    else
        return cumulative_ticks + current_tick - playstart_tick;
}

void mp3_reset_playtime(void)
{
    cumulative_ticks = 0;
    playstart_tick = current_tick;
}


bool mp3_is_playing(void)
{
    return playing;
}


/* returns the next byte position which would be transferred */
unsigned char* mp3_get_pos(void)
{
    return (unsigned char*)SAR3;
}


#endif /* #ifndef SIMULATOR */

#else /* CONFIG_HWCODEC != MASNONE */
void mp3_init(int volume, int bass, int treble, int balance, int loudness,
              int avc, int channel_config, int stereo_width,
              int mdb_strength, int mdb_harmonics,
              int mdb_center, int mdb_shape, bool mdb_enable,
              bool superbass)
{
    /* a dummy */
    (void)volume;
    (void)bass;
    (void)treble;
    (void)balance;
    (void)loudness;
    (void)avc;
    (void)channel_config;
    (void)stereo_width;
    (void)mdb_strength;
    (void)mdb_harmonics;
    (void)mdb_center;
    (void)mdb_shape;
    (void)mdb_enable;
    (void)superbass;

    paused = false;
    playing = false;
#ifndef SIMULATOR
    playstart_tick = 0;
    cumulative_ticks = 0;
    callback_for_more = 0;
    audio_is_initialized = false;
#endif
}
void mp3_shutdown(void)
{
    /* a dummy */
}
void mp3_play_data(const unsigned char* start, int size,
                   void (*get_more)(unsigned char** start, int* size))
{
    /* a dummy */
    (void)start;
    (void)size;
    (void)get_more;
}

void mp3_play_stop(void)
{
    /* a dummy */
}

void mp3_play_pause(bool play)
{
    /* a dummy */
    (void)play;
}

unsigned char* mp3_get_pos(void)
{
    /* a dummy */
    return (unsigned char *)0x1234;
}
#endif /* CONFIG_HWCODEC == MASNONE */