1 /* $FreeBSD: src/sys/dev/bktr/bktr_audio.c,v 1.2.2.5 2003/02/08 02:04:57 orion Exp $ */
2 /* $DragonFly: src/sys/dev/video/bktr/bktr_audio.c,v 1.5 2004/02/13 01:45:15 joerg Exp $ */
4 * This is part of the Driver for Video Capture Cards (Frame grabbers)
5 * and TV Tuner cards using the Brooktree Bt848, Bt848A, Bt849A, Bt878, Bt879
7 * Copyright Roger Hardiman and Amancio Hasty.
9 * bktr_audio : This deals with controlling the audio on TV cards,
10 * controlling the Audio Multiplexer (audio source selector).
11 * controlling any MSP34xx stereo audio decoders.
12 * controlling any DPL35xx dolby surroud sound audio decoders.
13 * initialising TDA98xx audio devices.
18 * 1. Redistributions of source code must retain the
19 * Copyright (c) 1997 Amancio Hasty, 1999 Roger Hardiman
20 * All rights reserved.
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
25 * 1. Redistributions of source code must retain the above copyright
26 * notice, this list of conditions and the following disclaimer.
27 * 2. Redistributions in binary form must reproduce the above copyright
28 * notice, this list of conditions and the following disclaimer in the
29 * documentation and/or other materials provided with the distribution.
30 * 3. All advertising materials mentioning features or use of this software
31 * must display the following acknowledgement:
32 * This product includes software developed by Amancio Hasty and
34 * 4. The name of the author may not be used to endorse or promote products
35 * derived from this software without specific prior written permission.
37 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
38 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
39 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
40 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
41 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
42 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
43 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
44 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
45 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
46 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
47 * POSSIBILITY OF SUCH DAMAGE.
50 #include <sys/param.h>
51 #include <sys/systm.h>
52 #include <sys/kernel.h>
53 #include <sys/vnode.h>
55 #if defined(__DragonFly__) || defined(__FreeBSD__)
57 #if defined(__DragonFly__) || (__FreeBSD_version < 500000)
58 #include <machine/clock.h> /* for DELAY */
61 #include <bus/pci/pcivar.h>
63 #if defined(__DragonFly__) || (__FreeBSD_version >=300000)
64 #include <machine/bus_memio.h> /* for bus space */
65 #include <machine/bus.h>
72 #include <dev/ic/bt8xx.h> /* NetBSD location of .h files */
73 #include <dev/pci/bktr/bktr_reg.h>
74 #include <dev/pci/bktr/bktr_core.h>
75 #include <dev/pci/bktr/bktr_tuner.h>
76 #include <dev/pci/bktr/bktr_card.h>
77 #include <dev/pci/bktr/bktr_audio.h>
79 #include <machine/ioctl_meteor.h> /* Traditional location of .h files */
80 #include <machine/ioctl_bt848.h> /* extensions to ioctl_meteor.h */
82 #include "bktr_core.h"
83 #include "bktr_tuner.h"
84 #include "bktr_card.h"
85 #include "bktr_audio.h"
89 * Prototypes for the GV_BCTV2 specific functions.
91 void set_bctv2_audio( bktr_ptr_t bktr );
92 void bctv2_gpio_write( bktr_ptr_t bktr, int port, int val );
93 /*int bctv2_gpio_read( bktr_ptr_t bktr, int port );*/ /* Not used */
97 * Reset any MSP34xx or TDA98xx audio devices.
99 void init_audio_devices( bktr_ptr_t bktr ) {
101 /* enable stereo if appropriate on TDA audio chip */
102 if ( bktr->card.dbx )
105 /* reset the MSP34xx stereo audio chip */
106 if ( bktr->card.msp3400c )
107 msp_dpl_reset( bktr, bktr->msp_addr );
109 /* reset the DPL35xx dolby audio chip */
110 if ( bktr->card.dpl3518a )
111 msp_dpl_reset( bktr, bktr->dpl_addr );
119 #define AUDIOMUX_DISCOVER_NOT
121 set_audio( bktr_ptr_t bktr, int cmd )
126 #if defined( AUDIOMUX_DISCOVER )
130 #endif /* AUDIOMUX_DISCOVER */
132 /* check for existance of audio MUXes */
133 if ( !bktr->card.audiomuxs[ 4 ] )
138 #ifdef BKTR_REVERSEMUTE
139 bktr->audio_mux_select = 3;
141 bktr->audio_mux_select = 0;
144 if (bktr->reverse_mute )
145 bktr->audio_mux_select = 0;
147 bktr->audio_mux_select = 3;
151 bktr->audio_mux_select = 1;
154 bktr->audio_mux_select = 2;
157 bktr->audio_mute_state = TRUE; /* set mute */
160 bktr->audio_mute_state = FALSE; /* clear mute */
163 printf("%s: audio cmd error %02x\n", bktr_name(bktr),
169 /* Most cards have a simple audio multiplexer to select the
170 * audio source. The I/O_GV card has a more advanced multiplexer
171 * and requires special handling.
173 if ( bktr->bt848_card == CARD_IO_BCTV2 ) {
174 set_bctv2_audio( bktr );
178 /* Proceed with the simpler audio multiplexer code for the majority
183 * Leave the upper bits of the GPIO port alone in case they control
184 * something like the dbx or teletext chips. This doesn't guarantee
185 * success, but follows the rule of least astonishment.
188 if ( bktr->audio_mute_state == TRUE ) {
189 #ifdef BKTR_REVERSEMUTE
195 if (bktr->reverse_mute )
202 idx = bktr->audio_mux_select;
205 temp = INL(bktr, BKTR_GPIO_DATA) & ~bktr->card.gpio_mux_bits;
206 #if defined( AUDIOMUX_DISCOVER )
207 OUTL(bktr, BKTR_GPIO_DATA, temp | (cmd & 0xff));
208 printf("%s: cmd: %d audio mux %x temp %x \n", bktr_name(bktr),
209 cmd, bktr->card.audiomuxs[ idx ], temp );
211 OUTL(bktr, BKTR_GPIO_DATA, temp | bktr->card.audiomuxs[ idx ]);
212 #endif /* AUDIOMUX_DISCOVER */
216 /* Some new Hauppauge cards do not have an audio mux */
217 /* Instead we use the MSP34xx chip to select TV audio, Line-In */
218 /* FM Radio and Mute */
219 /* Examples of this are the Hauppauge 44xxx MSP34xx models */
220 /* It is ok to drive both the mux and the MSP34xx chip. */
221 /* If there is no mux, the MSP does the switching of the audio source */
222 /* If there is a mux, it does the switching of the audio source */
224 if ((bktr->card.msp3400c) && (bktr->audio_mux_present == 0)) {
226 if (bktr->audio_mute_state == TRUE ) {
227 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0000, 0x0000); /* volume to MUTE */
229 if(bktr->audio_mux_select == 0) { /* TV Tuner */
230 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0000, 0x7300); /* 0 db volume */
231 if (bktr->msp_source_selected != 0) msp_autodetect(bktr); /* setup TV audio mode */
232 bktr->msp_source_selected = 0;
234 if(bktr->audio_mux_select == 1) { /* Line In */
235 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0000, 0x7300); /* 0 db volume */
236 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x000d, 0x1900); /* scart prescale */
237 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0008, 0x0220); /* SCART | STEREO */
238 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0013, 0x0000); /* DSP In = SC1_IN_L/R */
239 bktr->msp_source_selected = 1;
242 if(bktr->audio_mux_select == 2) { /* FM Radio */
243 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0000, 0x7300); /* 0 db volume */
244 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x000d, 0x1900); /* scart prescale */
245 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0008, 0x0220); /* SCART | STEREO */
246 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0013, 0x0200); /* DSP In = SC2_IN_L/R */
247 bktr->msp_source_selected = 2;
261 temp_mute( bktr_ptr_t bktr, int flag )
263 static int muteState = FALSE;
265 if ( flag == TRUE ) {
266 muteState = bktr->audio_mute_state;
267 set_audio( bktr, AUDIO_MUTE ); /* prevent 'click' */
270 tsleep( BKTR_SLEEP, 0, "tuning", hz/8 );
271 if ( muteState == FALSE )
272 set_audio( bktr, AUDIO_UNMUTE );
276 /* address of BTSC/SAP decoder chip */
277 #define TDA9850_WADDR 0xb6
278 #define TDA9850_RADDR 0xb7
281 /* registers in the TDA9850 BTSC/dbx chip */
282 #define CON1ADDR 0x04
283 #define CON2ADDR 0x05
284 #define CON3ADDR 0x06
285 #define CON4ADDR 0x07
286 #define ALI1ADDR 0x08
287 #define ALI2ADDR 0x09
288 #define ALI3ADDR 0x0a
291 * initialise the dbx chip
292 * taken from the Linux bttv driver TDA9850 initialisation code
295 init_BTSC( bktr_ptr_t bktr )
297 i2cWrite(bktr, TDA9850_WADDR, CON1ADDR, 0x08); /* noise threshold st */
298 i2cWrite(bktr, TDA9850_WADDR, CON2ADDR, 0x08); /* noise threshold sap */
299 i2cWrite(bktr, TDA9850_WADDR, CON3ADDR, 0x40); /* stereo mode */
300 i2cWrite(bktr, TDA9850_WADDR, CON4ADDR, 0x07); /* 0 dB input gain? */
301 i2cWrite(bktr, TDA9850_WADDR, ALI1ADDR, 0x10); /* wideband alignment? */
302 i2cWrite(bktr, TDA9850_WADDR, ALI2ADDR, 0x10); /* spectral alignment? */
303 i2cWrite(bktr, TDA9850_WADDR, ALI3ADDR, 0x03);
308 * XXX FIXME: alot of work to be done here, this merely unmutes it.
311 set_BTSC( bktr_ptr_t bktr, int control )
313 return( i2cWrite( bktr, TDA9850_WADDR, CON3ADDR, control ) );
317 * CARD_GV_BCTV2 specific functions.
320 #define BCTV2_AUDIO_MAIN 0x10 /* main audio program */
321 #define BCTV2_AUDIO_SUB 0x20 /* sub audio program */
322 #define BCTV2_AUDIO_BOTH 0x30 /* main(L) + sub(R) program */
324 #define BCTV2_GPIO_REG0 1
325 #define BCTV2_GPIO_REG1 3
327 #define BCTV2_GR0_AUDIO_MODE 3
328 #define BCTV2_GR0_AUDIO_MAIN 0 /* main program */
329 #define BCTV2_GR0_AUDIO_SUB 3 /* sub program */
330 #define BCTV2_GR0_AUDIO_BOTH 1 /* main(L) + sub(R) */
331 #define BCTV2_GR0_AUDIO_MUTE 4 /* audio mute */
332 #define BCTV2_GR0_AUDIO_MONO 8 /* force mono */
335 set_bctv2_audio( bktr_ptr_t bktr )
339 switch (bktr->audio_mux_select) {
340 case 1: /* external */
341 case 2: /* internal */
342 bctv2_gpio_write(bktr, BCTV2_GPIO_REG1, 0);
345 bctv2_gpio_write(bktr, BCTV2_GPIO_REG1, 1);
348 /* switch (bktr->audio_sap_select) { */
349 switch (BCTV2_AUDIO_BOTH) {
350 case BCTV2_AUDIO_SUB:
351 data = BCTV2_GR0_AUDIO_SUB;
353 case BCTV2_AUDIO_BOTH:
354 data = BCTV2_GR0_AUDIO_BOTH;
356 case BCTV2_AUDIO_MAIN:
358 data = BCTV2_GR0_AUDIO_MAIN;
361 if (bktr->audio_mute_state == TRUE)
362 data |= BCTV2_GR0_AUDIO_MUTE;
364 bctv2_gpio_write(bktr, BCTV2_GPIO_REG0, data);
369 /* gpio_data bit assignment */
370 #define BCTV2_GPIO_ADDR_MASK 0x000300
371 #define BCTV2_GPIO_WE 0x000400
372 #define BCTV2_GPIO_OE 0x000800
373 #define BCTV2_GPIO_VAL_MASK 0x00f000
375 #define BCTV2_GPIO_PORT_MASK 3
376 #define BCTV2_GPIO_ADDR_SHIFT 8
377 #define BCTV2_GPIO_VAL_SHIFT 12
379 /* gpio_out_en value for read/write */
380 #define BCTV2_GPIO_OUT_RMASK 0x000f00
381 #define BCTV2_GPIO_OUT_WMASK 0x00ff00
383 #define BCTV2_BITS 100
386 bctv2_gpio_write( bktr_ptr_t bktr, int port, int val )
388 u_long data, outbits;
390 port &= BCTV2_GPIO_PORT_MASK;
394 data = ((val << BCTV2_GPIO_VAL_SHIFT) & BCTV2_GPIO_VAL_MASK) |
395 ((port << BCTV2_GPIO_ADDR_SHIFT) & BCTV2_GPIO_ADDR_MASK) |
396 BCTV2_GPIO_WE | BCTV2_GPIO_OE;
397 outbits = BCTV2_GPIO_OUT_WMASK;
402 OUTL(bktr, BKTR_GPIO_OUT_EN, 0);
403 OUTL(bktr, BKTR_GPIO_DATA, data);
404 OUTL(bktr, BKTR_GPIO_OUT_EN, outbits);
406 OUTL(bktr, BKTR_GPIO_DATA, data & ~BCTV2_GPIO_WE);
408 OUTL(bktr, BKTR_GPIO_DATA, data);
410 OUTL(bktr, BKTR_GPIO_DATA, ~0);
411 OUTL(bktr, BKTR_GPIO_OUT_EN, 0);
416 bctv2_gpio_read( bktr_ptr_t bktr, int port )
418 u_long data, outbits, ret;
420 port &= BCTV2_GPIO_PORT_MASK;
424 data = ((port << BCTV2_GPIO_ADDR_SHIFT) & BCTV2_GPIO_ADDR_MASK) |
425 BCTV2_GPIO_WE | BCTV2_GPIO_OE;
426 outbits = BCTV2_GPIO_OUT_RMASK;
431 OUTL(bktr, BKTR_GPIO_OUT_EN, 0);
432 OUTL(bktr, BKTR_GPIO_DATA, data);
433 OUTL(bktr, BKTR_GPIO_OUT_EN, outbits);
435 OUTL(bktr, BKTR_GPIO_DATA, data & ~BCTV2_GPIO_OE);
437 ret = INL(bktr, BKTR_GPIO_DATA);
439 OUTL(bktr, BKTR_GPIO_DATA, data);
441 OUTL(bktr, BKTR_GPIO_DATA, ~0);
442 OUTL(bktr, BKTR_GPIO_OUT_EN, 0);
443 return( (ret & BCTV2_GPIO_VAL_MASK) >> BCTV2_GPIO_VAL_SHIFT );
448 * setup the MSP34xx Stereo Audio Chip
449 * This uses the Auto Configuration Option on MSP3410D and MSP3415D chips
450 * and DBX mode selection for MSP3430G chips.
451 * For MSP3400C support, the full programming sequence is required and is
455 /* Read the MSP version string */
456 void msp_read_id( bktr_ptr_t bktr ){
458 rev1 = msp_dpl_read(bktr, bktr->msp_addr, 0x12, 0x001e);
459 rev2 = msp_dpl_read(bktr, bktr->msp_addr, 0x12, 0x001f);
461 sprintf(bktr->msp_version_string, "34%02d%c-%c%d",
462 (rev2>>8)&0xff, (rev1&0xff)+'@', ((rev1>>8)&0xff)+'@', rev2&0x1f);
467 /* Configure the MSP chip to Auto-detect the audio format.
468 * For the MSP3430G, we use fast autodetect mode
469 * For the MSP3410/3415 there are two schemes for this
470 * a) Fast autodetection - the chip is put into autodetect mode, and the function
471 * returns immediatly. This works in most cases and is the Default Mode.
472 * b) Slow mode. The function sets the MSP3410/3415 chip, then waits for feedback from
473 * the chip and re-programs it if needed.
475 void msp_autodetect( bktr_ptr_t bktr ) {
476 int auto_detect, loops;
479 /* MSP3430G - countries with mono and DBX stereo */
480 if (strncmp("3430G", bktr->msp_version_string, 5) == 0){
482 msp_dpl_write(bktr, bktr->msp_addr, 0x10, 0x0030,0x2003);/* Enable Auto format detection */
483 msp_dpl_write(bktr, bktr->msp_addr, 0x10, 0x0020,0x0020);/* Standard Select Reg. = BTSC-Stereo*/
484 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x000E,0x2403);/* darned if I know */
485 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0008,0x0320);/* Source select = (St or A) */
486 /* & Ch. Matrix = St */
487 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0000,0x7300);/* Set volume to 0db gain */
491 /* MSP3415D SPECIAL CASE Use the Tuner's Mono audio ouput for the MSP */
492 /* (for Hauppauge 44xxx card with Tuner Type 0x2a) */
493 else if ( ( (strncmp("3415D", bktr->msp_version_string, 5) == 0)
494 &&(bktr->msp_use_mono_source == 1)
496 || (bktr->slow_msp_audio == 2) ){
497 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0000, 0x7300); /* 0 db volume */
498 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x000d, 0x1900); /* scart prescale */
499 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0008, 0x0220); /* SCART | STEREO */
500 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0013, 0x0100); /* DSP In = MONO IN */
504 /* MSP3410/MSP3415 - countries with mono, stereo using 2 FM channels and NICAM */
505 /* FAST sound scheme */
506 else if (bktr->slow_msp_audio == 0) {
507 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0000,0x7300);/* Set volume to 0db gain */
508 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0008,0x0000);/* Spkr Source = default(FM/AM) */
509 msp_dpl_write(bktr, bktr->msp_addr, 0x10, 0x0020,0x0001);/* Enable Auto format detection */
510 msp_dpl_write(bktr, bktr->msp_addr, 0x10, 0x0021,0x0001);/* Auto selection of NICAM/MONO mode */
514 /* MSP3410/MSP3415 - European Countries where the fast MSP3410/3415 programming fails */
515 /* SLOW sound scheme */
516 else if ( bktr->slow_msp_audio == 1) {
517 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0000,0x7300);/* Set volume to 0db gain */
518 msp_dpl_write(bktr, bktr->msp_addr, 0x10, 0x0020,0x0001);/* Enable Auto format detection */
520 /* wait for 0.5s max for terrestrial sound autodetection */
524 auto_detect = msp_dpl_read(bktr, bktr->msp_addr, 0x10, 0x007e);
526 } while (auto_detect > 0xff && loops < 50);
527 if (bootverbose)printf ("%s: Result of autodetect after %dms: %d\n",
528 bktr_name(bktr), loops*10, auto_detect);
530 /* Now set the audio baseband processing */
531 switch (auto_detect) {
532 case 0: /* no TV sound standard detected */
534 case 2: /* M Dual FM */
536 case 3: /* B/G Dual FM; German stereo */
537 /* Read the stereo detection value from DSP reg 0x0018 */
539 stereo = msp_dpl_read(bktr, bktr->msp_addr, 0x12, 0x0018);
540 if (bootverbose)printf ("%s: Stereo reg 0x18 a: %d\n",
541 bktr_name(bktr), stereo);
543 stereo = msp_dpl_read(bktr, bktr->msp_addr, 0x12, 0x0018);
544 if (bootverbose)printf ("%s: Stereo reg 0x18 b: %d\n",
545 bktr_name(bktr), stereo);
547 stereo = msp_dpl_read(bktr, bktr->msp_addr, 0x12, 0x0018);
548 if (bootverbose)printf ("%s: Stereo reg 0x18 c: %d\n",
549 bktr_name(bktr), stereo);
550 if (stereo > 0x0100 && stereo < 0x8000) { /* Seems to be stereo */
551 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0008,0x0020);/* Loudspeaker set stereo*/
553 set spatial effect strength to 50% enlargement
554 set spatial effect mode b, stereo basewidth enlargment only
556 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0005,0x3f28);
557 } else if (stereo > 0x8000) { /* bilingual mode */
558 if (bootverbose) printf ("%s: Bilingual mode detected\n",
560 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0008,0x0000);/* Loudspeaker */
561 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0005,0x0000);/* all spatial effects off */
562 } else { /* must be mono */
563 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0008,0x0030);/* Loudspeaker */
565 set spatial effect strength to 50% enlargement
566 set spatial effect mode a, stereo basewidth enlargment
567 and pseudo stereo effect with automatic high-pass filter
569 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0005,0x3f08);
572 /* The reset value for Channel matrix mode is FM/AM and SOUNDA/LEFT */
573 /* We would like STEREO instead val: 0x0020 */
574 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0008,0x0020);/* Loudspeaker */
575 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0009,0x0020);/* Headphone */
576 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x000a,0x0020);/* SCART1 */
577 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0041,0x0020);/* SCART2 */
578 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x000b,0x0020);/* I2S */
579 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x000c,0x0020);/* Quasi-Peak Detector Source */
580 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x000e,0x0001);
583 case 8: /* B/G FM NICAM */
584 msp_dpl_write(bktr, bktr->msp_addr, 0x10, 0x0021,0x0001);/* Auto selection of NICAM/MONO mode */
586 case 9: /* L_AM NICAM or D/K*/
587 case 10: /* i-FM NICAM */
590 if (bootverbose) printf ("%s: Unknown autodetection result value: %d\n",
591 bktr_name(bktr), auto_detect);
597 /* uncomment the following line to enable the MSP34xx 1Khz Tone Generator */
598 /* turn your speaker volume down low before trying this */
599 /* msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0014, 0x7f40); */
602 /* Read the DPL version string */
603 void dpl_read_id( bktr_ptr_t bktr ){
605 rev1 = msp_dpl_read(bktr, bktr->dpl_addr, 0x12, 0x001e);
606 rev2 = msp_dpl_read(bktr, bktr->dpl_addr, 0x12, 0x001f);
608 sprintf(bktr->dpl_version_string, "34%02d%c-%c%d",
609 ((rev2>>8)&0xff)-1, (rev1&0xff)+'@', ((rev1>>8)&0xff)+'@', rev2&0x1f);
612 /* Configure the DPL chip to Auto-detect the audio format */
613 void dpl_autodetect( bktr_ptr_t bktr ) {
615 /* The following are empiric values tried from the DPL35xx data sheet */
616 msp_dpl_write(bktr, bktr->dpl_addr, 0x12, 0x000c,0x0320); /* quasi peak detector source dolby
617 lr 0x03xx; quasi peak detector matrix
619 msp_dpl_write(bktr, bktr->dpl_addr, 0x12, 0x0040,0x0060); /* Surround decoder mode;
620 ADAPTIVE/3D-PANORAMA, that means two
621 speakers and no center speaker, all
622 channels L/R/C/S mixed to L and R */
623 msp_dpl_write(bktr, bktr->dpl_addr, 0x12, 0x0041,0x0620); /* surround source matrix;I2S2/STEREO*/
624 msp_dpl_write(bktr, bktr->dpl_addr, 0x12, 0x0042,0x1F00); /* surround delay 31ms max */
625 msp_dpl_write(bktr, bktr->dpl_addr, 0x12, 0x0043,0x0000); /* automatic surround input balance */
626 msp_dpl_write(bktr, bktr->dpl_addr, 0x12, 0x0044,0x4000); /* surround spatial effect 50%
628 msp_dpl_write(bktr, bktr->dpl_addr, 0x12, 0x0045,0x5400); /* surround panorama effect 66%
629 recommended with PANORAMA mode
630 in 0x0040 set to panorama */