3 * This is part of the Driver for Video Capture Cards (Frame grabbers)
4 * and TV Tuner cards using the Brooktree Bt848, Bt848A, Bt849A, Bt878, Bt879
6 * Copyright Roger Hardiman and Amancio Hasty.
8 * bktr_audio : This deals with controlling the audio on TV cards,
9 * controlling the Audio Multiplexer (audio source selector).
10 * controlling any MSP34xx stereo audio decoders.
11 * controlling any DPL35xx dolby surroud sound audio decoders.
12 * initialising TDA98xx audio devices.
17 * 1. Redistributions of source code must retain the
18 * Copyright (c) 1997 Amancio Hasty, 1999 Roger Hardiman
19 * All rights reserved.
21 * Redistribution and use in source and binary forms, with or without
22 * modification, are permitted provided that the following conditions
24 * 1. Redistributions of source code must retain the above copyright
25 * notice, this list of conditions and the following disclaimer.
26 * 2. Redistributions in binary form must reproduce the above copyright
27 * notice, this list of conditions and the following disclaimer in the
28 * documentation and/or other materials provided with the distribution.
29 * 3. All advertising materials mentioning features or use of this software
30 * must display the following acknowledgement:
31 * This product includes software developed by Amancio Hasty and
33 * 4. The name of the author may not be used to endorse or promote products
34 * derived from this software without specific prior written permission.
36 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
37 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
38 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
39 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
40 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
41 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
42 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
43 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
44 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
45 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
46 * POSSIBILITY OF SUCH DAMAGE.
49 #include <sys/param.h>
50 #include <sys/systm.h>
51 #include <sys/kernel.h>
52 #include <sys/vnode.h>
56 #if (__FreeBSD_version < 500000)
57 #include <machine/clock.h> /* for DELAY */
60 #include <pci/pcivar.h>
62 #if (__FreeBSD_version >=300000)
63 #include <machine/bus_memio.h> /* for bus space */
64 #include <machine/bus.h>
71 #include <dev/ic/bt8xx.h> /* NetBSD location of .h files */
72 #include <dev/pci/bktr/bktr_reg.h>
73 #include <dev/pci/bktr/bktr_core.h>
74 #include <dev/pci/bktr/bktr_tuner.h>
75 #include <dev/pci/bktr/bktr_card.h>
76 #include <dev/pci/bktr/bktr_audio.h>
78 #include <machine/ioctl_meteor.h> /* Traditional location of .h files */
79 #include <machine/ioctl_bt848.h> /* extensions to ioctl_meteor.h */
80 #include <dev/bktr/bktr_reg.h>
81 #include <dev/bktr/bktr_core.h>
82 #include <dev/bktr/bktr_tuner.h>
83 #include <dev/bktr/bktr_card.h>
84 #include <dev/bktr/bktr_audio.h>
88 * Prototypes for the GV_BCTV specific functions.
90 void set_bctv_audio( bktr_ptr_t bktr );
91 void bctv_gpio_write( bktr_ptr_t bktr, int port, int val );
92 /*int bctv_gpio_read( bktr_ptr_t bktr, int port );*/ /* Not used */
98 * Reset any MSP34xx or TDA98xx audio devices.
100 void init_audio_devices( bktr_ptr_t bktr ) {
102 /* enable stereo if appropriate on TDA audio chip */
103 if ( bktr->card.dbx )
106 /* reset the MSP34xx stereo audio chip */
107 if ( bktr->card.msp3400c )
108 msp_dpl_reset( bktr, bktr->msp_addr );
110 /* reset the DPL35xx dolby audio chip */
111 if ( bktr->card.dpl3518a )
112 msp_dpl_reset( bktr, bktr->dpl_addr );
120 #define AUDIOMUX_DISCOVER_NOT
122 set_audio( bktr_ptr_t bktr, int cmd )
127 #if defined( AUDIOMUX_DISCOVER )
131 #endif /* AUDIOMUX_DISCOVER */
133 /* check for existance of audio MUXes */
134 if ( !bktr->card.audiomuxs[ 4 ] )
139 #ifdef BKTR_REVERSEMUTE
140 bktr->audio_mux_select = 3;
142 bktr->audio_mux_select = 0;
145 if (bktr->reverse_mute )
146 bktr->audio_mux_select = 0;
148 bktr->audio_mux_select = 3;
152 bktr->audio_mux_select = 1;
155 bktr->audio_mux_select = 2;
158 bktr->audio_mute_state = TRUE; /* set mute */
161 bktr->audio_mute_state = FALSE; /* clear mute */
164 printf("%s: audio cmd error %02x\n", bktr_name(bktr),
170 /* Most cards have a simple audio multiplexer to select the
171 * audio source. The I/O_GV card has a more advanced multiplexer
172 * and requires special handling.
174 if ( bktr->bt848_card == CARD_IO_GV ) {
175 set_bctv_audio( bktr );
179 /* Proceed with the simpler audio multiplexer code for the majority
184 * Leave the upper bits of the GPIO port alone in case they control
185 * something like the dbx or teletext chips. This doesn't guarantee
186 * success, but follows the rule of least astonishment.
189 if ( bktr->audio_mute_state == TRUE ) {
190 #ifdef BKTR_REVERSEMUTE
196 if (bktr->reverse_mute )
203 idx = bktr->audio_mux_select;
206 temp = INL(bktr, BKTR_GPIO_DATA) & ~bktr->card.gpio_mux_bits;
207 #if defined( AUDIOMUX_DISCOVER )
208 OUTL(bktr, BKTR_GPIO_DATA, temp | (cmd & 0xff));
209 printf("%s: cmd: %d audio mux %x temp %x \n", bktr_name(bktr),
210 cmd, bktr->card.audiomuxs[ idx ], temp );
212 OUTL(bktr, BKTR_GPIO_DATA, temp | bktr->card.audiomuxs[ idx ]);
213 #endif /* AUDIOMUX_DISCOVER */
217 /* Some new Hauppauge cards do not have an audio mux */
218 /* Instead we use the MSP34xx chip to select TV audio, Line-In */
219 /* FM Radio and Mute */
220 /* Examples of this are the Hauppauge 44xxx MSP34xx models */
221 /* It is ok to drive both the mux and the MSP34xx chip. */
222 /* If there is no mux, the MSP does the switching of the audio source */
223 /* If there is a mux, it does the switching of the audio source */
225 if ((bktr->card.msp3400c) && (bktr->audio_mux_present == 0)) {
227 if (bktr->audio_mute_state == TRUE ) {
228 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0000, 0x0000); /* volume to MUTE */
230 if(bktr->audio_mux_select == 0) { /* TV Tuner */
231 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0000, 0x7300); /* 0 db volume */
232 if (bktr->msp_source_selected != 0) msp_autodetect(bktr); /* setup TV audio mode */
233 bktr->msp_source_selected = 0;
235 if(bktr->audio_mux_select == 1) { /* Line In */
236 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0000, 0x7300); /* 0 db volume */
237 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x000d, 0x1900); /* scart prescale */
238 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0008, 0x0220); /* SCART | STEREO */
239 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0013, 0x0000); /* DSP In = SC1_IN_L/R */
240 bktr->msp_source_selected = 1;
243 if(bktr->audio_mux_select == 2) { /* FM Radio */
244 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0000, 0x7300); /* 0 db volume */
245 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x000d, 0x1900); /* scart prescale */
246 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0008, 0x0220); /* SCART | STEREO */
247 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0013, 0x0200); /* DSP In = SC2_IN_L/R */
248 bktr->msp_source_selected = 2;
262 temp_mute( bktr_ptr_t bktr, int flag )
264 static int muteState = FALSE;
266 if ( flag == TRUE ) {
267 muteState = bktr->audio_mute_state;
268 set_audio( bktr, AUDIO_MUTE ); /* prevent 'click' */
271 tsleep( BKTR_SLEEP, PZERO, "tuning", hz/8 );
272 if ( muteState == FALSE )
273 set_audio( bktr, AUDIO_UNMUTE );
277 /* address of BTSC/SAP decoder chip */
278 #define TDA9850_WADDR 0xb6
279 #define TDA9850_RADDR 0xb7
282 /* registers in the TDA9850 BTSC/dbx chip */
283 #define CON1ADDR 0x04
284 #define CON2ADDR 0x05
285 #define CON3ADDR 0x06
286 #define CON4ADDR 0x07
287 #define ALI1ADDR 0x08
288 #define ALI2ADDR 0x09
289 #define ALI3ADDR 0x0a
292 * initialise the dbx chip
293 * taken from the Linux bttv driver TDA9850 initialisation code
296 init_BTSC( bktr_ptr_t bktr )
298 i2cWrite(bktr, TDA9850_WADDR, CON1ADDR, 0x08); /* noise threshold st */
299 i2cWrite(bktr, TDA9850_WADDR, CON2ADDR, 0x08); /* noise threshold sap */
300 i2cWrite(bktr, TDA9850_WADDR, CON3ADDR, 0x40); /* stereo mode */
301 i2cWrite(bktr, TDA9850_WADDR, CON4ADDR, 0x07); /* 0 dB input gain? */
302 i2cWrite(bktr, TDA9850_WADDR, ALI1ADDR, 0x10); /* wideband alignment? */
303 i2cWrite(bktr, TDA9850_WADDR, ALI2ADDR, 0x10); /* spectral alignment? */
304 i2cWrite(bktr, TDA9850_WADDR, ALI3ADDR, 0x03);
309 * XXX FIXME: alot of work to be done here, this merely unmutes it.
312 set_BTSC( bktr_ptr_t bktr, int control )
314 return( i2cWrite( bktr, TDA9850_WADDR, CON3ADDR, control ) );
318 * CARD_GV_BCTV specific functions.
321 #define BCTV_AUDIO_MAIN 0x10 /* main audio program */
322 #define BCTV_AUDIO_SUB 0x20 /* sub audio program */
323 #define BCTV_AUDIO_BOTH 0x30 /* main(L) + sub(R) program */
325 #define BCTV_GPIO_REG0 1
326 #define BCTV_GPIO_REG1 3
328 #define BCTV_GR0_AUDIO_MODE 3
329 #define BCTV_GR0_AUDIO_MAIN 0 /* main program */
330 #define BCTV_GR0_AUDIO_SUB 3 /* sub program */
331 #define BCTV_GR0_AUDIO_BOTH 1 /* main(L) + sub(R) */
332 #define BCTV_GR0_AUDIO_MUTE 4 /* audio mute */
333 #define BCTV_GR0_AUDIO_MONO 8 /* force mono */
336 set_bctv_audio( bktr_ptr_t bktr )
340 switch (bktr->audio_mux_select) {
341 case 1: /* external */
342 case 2: /* internal */
343 bctv_gpio_write(bktr, BCTV_GPIO_REG1, 0);
346 bctv_gpio_write(bktr, BCTV_GPIO_REG1, 1);
349 /* switch (bktr->audio_sap_select) { */
350 switch (BCTV_AUDIO_BOTH) {
352 data = BCTV_GR0_AUDIO_SUB;
354 case BCTV_AUDIO_BOTH:
355 data = BCTV_GR0_AUDIO_BOTH;
357 case BCTV_AUDIO_MAIN:
359 data = BCTV_GR0_AUDIO_MAIN;
362 if (bktr->audio_mute_state == TRUE)
363 data |= BCTV_GR0_AUDIO_MUTE;
365 bctv_gpio_write(bktr, BCTV_GPIO_REG0, data);
370 /* gpio_data bit assignment */
371 #define BCTV_GPIO_ADDR_MASK 0x000300
372 #define BCTV_GPIO_WE 0x000400
373 #define BCTV_GPIO_OE 0x000800
374 #define BCTV_GPIO_VAL_MASK 0x00f000
376 #define BCTV_GPIO_PORT_MASK 3
377 #define BCTV_GPIO_ADDR_SHIFT 8
378 #define BCTV_GPIO_VAL_SHIFT 12
380 /* gpio_out_en value for read/write */
381 #define BCTV_GPIO_OUT_RMASK 0x000f00
382 #define BCTV_GPIO_OUT_WMASK 0x00ff00
384 #define BCTV_BITS 100
387 bctv_gpio_write( bktr_ptr_t bktr, int port, int val )
389 u_long data, outbits;
391 port &= BCTV_GPIO_PORT_MASK;
395 data = ((val << BCTV_GPIO_VAL_SHIFT) & BCTV_GPIO_VAL_MASK) |
396 ((port << BCTV_GPIO_ADDR_SHIFT) & BCTV_GPIO_ADDR_MASK) |
397 BCTV_GPIO_WE | BCTV_GPIO_OE;
398 outbits = BCTV_GPIO_OUT_WMASK;
403 OUTL(bktr, BKTR_GPIO_OUT_EN, 0);
404 OUTL(bktr, BKTR_GPIO_DATA, data);
405 OUTL(bktr, BKTR_GPIO_OUT_EN, outbits);
407 OUTL(bktr, BKTR_GPIO_DATA, data & ~BCTV_GPIO_WE);
409 OUTL(bktr, BKTR_GPIO_DATA, data);
411 OUTL(bktr, BKTR_GPIO_DATA, ~0);
412 OUTL(bktr, BKTR_GPIO_OUT_EN, 0);
417 bctv_gpio_read( bktr_ptr_t bktr, int port )
419 u_long data, outbits, ret;
421 port &= BCTV_GPIO_PORT_MASK;
425 data = ((port << BCTV_GPIO_ADDR_SHIFT) & BCTV_GPIO_ADDR_MASK) |
426 BCTV_GPIO_WE | BCTV_GPIO_OE;
427 outbits = BCTV_GPIO_OUT_RMASK;
432 OUTL(bktr, BKTR_GPIO_OUT_EN, 0);
433 OUTL(bktr, BKTR_GPIO_DATA, data);
434 OUTL(bktr, BKTR_GPIO_OUT_EN, outbits);
436 OUTL(bktr, BKTR_GPIO_DATA, data & ~BCTV_GPIO_OE);
438 ret = INL(bktr, BKTR_GPIO_DATA);
440 OUTL(bktr, BKTR_GPIO_DATA, data);
442 OUTL(bktr, BKTR_GPIO_DATA, ~0);
443 OUTL(bktr, BKTR_GPIO_OUT_EN, 0);
444 return( (ret & BCTV_GPIO_VAL_MASK) >> BCTV_GPIO_VAL_SHIFT );
449 * setup the MSP34xx Stereo Audio Chip
450 * This uses the Auto Configuration Option on MSP3410D and MSP3415D chips
451 * and DBX mode selection for MSP3430G chips.
452 * For MSP3400C support, the full programming sequence is required and is
456 /* Read the MSP version string */
457 void msp_read_id( bktr_ptr_t bktr ){
459 rev1 = msp_dpl_read(bktr, bktr->msp_addr, 0x12, 0x001e);
460 rev2 = msp_dpl_read(bktr, bktr->msp_addr, 0x12, 0x001f);
462 sprintf(bktr->msp_version_string, "34%02d%c-%c%d",
463 (rev2>>8)&0xff, (rev1&0xff)+'@', ((rev1>>8)&0xff)+'@', rev2&0x1f);
468 /* Configure the MSP chip to Auto-detect the audio format.
469 * For the MSP3430G, we use fast autodetect mode
470 * For the MSP3410/3415 there are two schemes for this
471 * a) Fast autodetection - the chip is put into autodetect mode, and the function
472 * returns immediatly. This works in most cases and is the Default Mode.
473 * b) Slow mode. The function sets the MSP3410/3415 chip, then waits for feedback from
474 * the chip and re-programs it if needed.
476 void msp_autodetect( bktr_ptr_t bktr ) {
477 int auto_detect, loops;
480 /* MSP3430G - countries with mono and DBX stereo */
481 if (strncmp("3430G", bktr->msp_version_string, 5) == 0){
483 msp_dpl_write(bktr, bktr->msp_addr, 0x10, 0x0030,0x2003);/* Enable Auto format detection */
484 msp_dpl_write(bktr, bktr->msp_addr, 0x10, 0x0020,0x0020);/* Standard Select Reg. = BTSC-Stereo*/
485 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x000E,0x2403);/* darned if I know */
486 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0008,0x0320);/* Source select = (St or A) */
487 /* & Ch. Matrix = St */
488 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0000,0x7300);/* Set volume to 0db gain */
492 /* MSP3415D SPECIAL CASE Use the Tuner's Mono audio ouput for the MSP */
493 /* (for Hauppauge 44xxx card with Tuner Type 0x2a) */
494 else if ( ( (strncmp("3415D", bktr->msp_version_string, 5) == 0)
495 &&(bktr->msp_use_mono_source == 1)
497 || (bktr->slow_msp_audio == 2) ){
498 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0000, 0x7300); /* 0 db volume */
499 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x000d, 0x1900); /* scart prescale */
500 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0008, 0x0220); /* SCART | STEREO */
501 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0013, 0x0100); /* DSP In = MONO IN */
505 /* MSP3410/MSP3415 - countries with mono, stereo using 2 FM channels and NICAM */
506 /* FAST sound scheme */
507 else if (bktr->slow_msp_audio == 0) {
508 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0000,0x7300);/* Set volume to 0db gain */
509 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0008,0x0000);/* Spkr Source = default(FM/AM) */
510 msp_dpl_write(bktr, bktr->msp_addr, 0x10, 0x0020,0x0001);/* Enable Auto format detection */
511 msp_dpl_write(bktr, bktr->msp_addr, 0x10, 0x0021,0x0001);/* Auto selection of NICAM/MONO mode */
515 /* MSP3410/MSP3415 - European Countries where the fast MSP3410/3415 programming fails */
516 /* SLOW sound scheme */
517 else if ( bktr->slow_msp_audio == 1) {
518 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0000,0x7300);/* Set volume to 0db gain */
519 msp_dpl_write(bktr, bktr->msp_addr, 0x10, 0x0020,0x0001);/* Enable Auto format detection */
521 /* wait for 0.5s max for terrestrial sound autodetection */
525 auto_detect = msp_dpl_read(bktr, bktr->msp_addr, 0x10, 0x007e);
527 } while (auto_detect > 0xff && loops < 50);
528 if (bootverbose)printf ("%s: Result of autodetect after %dms: %d\n",
529 bktr_name(bktr), loops*10, auto_detect);
531 /* Now set the audio baseband processing */
532 switch (auto_detect) {
533 case 0: /* no TV sound standard detected */
535 case 2: /* M Dual FM */
537 case 3: /* B/G Dual FM; German stereo */
538 /* Read the stereo detection value from DSP reg 0x0018 */
540 stereo = msp_dpl_read(bktr, bktr->msp_addr, 0x12, 0x0018);
541 if (bootverbose)printf ("%s: Stereo reg 0x18 a: %d\n",
542 bktr_name(bktr), stereo);
544 stereo = msp_dpl_read(bktr, bktr->msp_addr, 0x12, 0x0018);
545 if (bootverbose)printf ("%s: Stereo reg 0x18 b: %d\n",
546 bktr_name(bktr), stereo);
548 stereo = msp_dpl_read(bktr, bktr->msp_addr, 0x12, 0x0018);
549 if (bootverbose)printf ("%s: Stereo reg 0x18 c: %d\n",
550 bktr_name(bktr), stereo);
551 if (stereo > 0x0100 && stereo < 0x8000) { /* Seems to be stereo */
552 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0008,0x0020);/* Loudspeaker set stereo*/
554 set spatial effect strength to 50% enlargement
555 set spatial effect mode b, stereo basewidth enlargment only
557 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0005,0x3f28);
558 } else if (stereo > 0x8000) { /* bilingual mode */
559 if (bootverbose) printf ("%s: Bilingual mode detected\n",
561 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0008,0x0000);/* Loudspeaker */
562 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0005,0x0000);/* all spatial effects off */
563 } else { /* must be mono */
564 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0008,0x0030);/* Loudspeaker */
566 set spatial effect strength to 50% enlargement
567 set spatial effect mode a, stereo basewidth enlargment
568 and pseudo stereo effect with automatic high-pass filter
570 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0005,0x3f08);
573 /* The reset value for Channel matrix mode is FM/AM and SOUNDA/LEFT */
574 /* We would like STEREO instead val: 0x0020 */
575 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0008,0x0020);/* Loudspeaker */
576 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0009,0x0020);/* Headphone */
577 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x000a,0x0020);/* SCART1 */
578 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0041,0x0020);/* SCART2 */
579 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x000b,0x0020);/* I2S */
580 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x000c,0x0020);/* Quasi-Peak Detector Source */
581 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x000e,0x0001);
584 case 8: /* B/G FM NICAM */
585 msp_dpl_write(bktr, bktr->msp_addr, 0x10, 0x0021,0x0001);/* Auto selection of NICAM/MONO mode */
587 case 9: /* L_AM NICAM or D/K*/
588 case 10: /* i-FM NICAM */
591 if (bootverbose) printf ("%s: Unknown autodetection result value: %d\n",
592 bktr_name(bktr), auto_detect);
598 /* uncomment the following line to enable the MSP34xx 1Khz Tone Generator */
599 /* turn your speaker volume down low before trying this */
600 /* msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0014, 0x7f40); */
603 /* Read the DPL version string */
604 void dpl_read_id( bktr_ptr_t bktr ){
606 rev1 = msp_dpl_read(bktr, bktr->dpl_addr, 0x12, 0x001e);
607 rev2 = msp_dpl_read(bktr, bktr->dpl_addr, 0x12, 0x001f);
609 sprintf(bktr->dpl_version_string, "34%02d%c-%c%d",
610 ((rev2>>8)&0xff)-1, (rev1&0xff)+'@', ((rev1>>8)&0xff)+'@', rev2&0x1f);
613 /* Configure the DPL chip to Auto-detect the audio format */
614 void dpl_autodetect( bktr_ptr_t bktr ) {
616 /* The following are empiric values tried from the DPL35xx data sheet */
617 msp_dpl_write(bktr, bktr->dpl_addr, 0x12, 0x000c,0x0320); /* quasi peak detector source dolby
618 lr 0x03xx; quasi peak detector matrix
620 msp_dpl_write(bktr, bktr->dpl_addr, 0x12, 0x0040,0x0060); /* Surround decoder mode;
621 ADAPTIVE/3D-PANORAMA, that means two
622 speakers and no center speaker, all
623 channels L/R/C/S mixed to L and R */
624 msp_dpl_write(bktr, bktr->dpl_addr, 0x12, 0x0041,0x0620); /* surround source matrix;I2S2/STEREO*/
625 msp_dpl_write(bktr, bktr->dpl_addr, 0x12, 0x0042,0x1F00); /* surround delay 31ms max */
626 msp_dpl_write(bktr, bktr->dpl_addr, 0x12, 0x0043,0x0000); /* automatic surround input balance */
627 msp_dpl_write(bktr, bktr->dpl_addr, 0x12, 0x0044,0x4000); /* surround spatial effect 50%
629 msp_dpl_write(bktr, bktr->dpl_addr, 0x12, 0x0045,0x5400); /* surround panorama effect 66%
630 recommended with PANORAMA mode
631 in 0x0040 set to panorama */