bktr_audio.c revision 62112
1/* $FreeBSD: head/sys/dev/bktr/bktr_audio.c 62112 2000-06-26 09:41:32Z roger $ */ 2/* 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 5 * chipset. 6 * Copyright Roger Hardiman and Amancio Hasty. 7 * 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. 13 * 14 */ 15 16/* 17 * 1. Redistributions of source code must retain the 18 * Copyright (c) 1997 Amancio Hasty, 1999 Roger Hardiman 19 * All rights reserved. 20 * 21 * Redistribution and use in source and binary forms, with or without 22 * modification, are permitted provided that the following conditions 23 * are met: 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 32 * Roger Hardiman 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. 35 * 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. 47 */ 48 49#include <sys/param.h> 50#include <sys/systm.h> 51#include <sys/kernel.h> 52#include <sys/vnode.h> 53 54#ifdef __FreeBSD__ 55#include <machine/clock.h> /* for DELAY */ 56#include <pci/pcivar.h> 57 58#if (__FreeBSD_version >=300000) 59#include <machine/bus_memio.h> /* for bus space */ 60#include <machine/bus.h> 61#include <sys/bus.h> 62#endif 63#endif 64 65#ifdef __NetBSD__ 66#include <sys/proc.h> 67#include <dev/ic/bt8xx.h> /* NetBSD location of .h files */ 68#include <dev/pci/bktr/bktr_reg.h> 69#include <dev/pci/bktr/bktr_core.h> 70#include <dev/pci/bktr/bktr_tuner.h> 71#include <dev/pci/bktr/bktr_card.h> 72#include <dev/pci/bktr/bktr_audio.h> 73#else 74#include <machine/ioctl_meteor.h> /* Traditional location of .h files */ 75#include <machine/ioctl_bt848.h> /* extensions to ioctl_meteor.h */ 76#include <dev/bktr/bktr_reg.h> 77#include <dev/bktr/bktr_core.h> 78#include <dev/bktr/bktr_tuner.h> 79#include <dev/bktr/bktr_card.h> 80#include <dev/bktr/bktr_audio.h> 81#endif 82 83/* 84 * Prototypes for the GV_BCTV specific functions. 85 */ 86void set_bctv_audio( bktr_ptr_t bktr ); 87void bctv_gpio_write( bktr_ptr_t bktr, int port, int val ); 88/*int bctv_gpio_read( bktr_ptr_t bktr, int port );*/ /* Not used */ 89 90 91 92/* 93 * init_audio_devices 94 * Reset any MSP34xx or TDA98xx audio devices. 95 */ 96void init_audio_devices( bktr_ptr_t bktr ) { 97 98 /* enable stereo if appropriate on TDA audio chip */ 99 if ( bktr->card.dbx ) 100 init_BTSC( bktr ); 101 102 /* reset the MSP34xx stereo audio chip */ 103 if ( bktr->card.msp3400c ) 104 msp_dpl_reset( bktr, bktr->msp_addr ); 105 106 /* reset the DPL35xx dolby audio chip */ 107 if ( bktr->card.dpl3518a ) 108 msp_dpl_reset( bktr, bktr->dpl_addr ); 109 110} 111 112 113/* 114 * 115 */ 116#define AUDIOMUX_DISCOVER_NOT 117int 118set_audio( bktr_ptr_t bktr, int cmd ) 119{ 120 u_long temp; 121 volatile u_char idx; 122 123#if defined( AUDIOMUX_DISCOVER ) 124 if ( cmd >= 200 ) 125 cmd -= 200; 126 else 127#endif /* AUDIOMUX_DISCOVER */ 128 129 /* check for existance of audio MUXes */ 130 if ( !bktr->card.audiomuxs[ 4 ] ) 131 return( -1 ); 132 133 switch (cmd) { 134 case AUDIO_TUNER: 135#ifdef BKTR_REVERSEMUTE 136 bktr->audio_mux_select = 3; 137#else 138 bktr->audio_mux_select = 0; 139#endif 140 141 if (bktr->reverse_mute ) 142 bktr->audio_mux_select = 0; 143 else 144 bktr->audio_mux_select = 3; 145 146 break; 147 case AUDIO_EXTERN: 148 bktr->audio_mux_select = 1; 149 break; 150 case AUDIO_INTERN: 151 bktr->audio_mux_select = 2; 152 break; 153 case AUDIO_MUTE: 154 bktr->audio_mute_state = TRUE; /* set mute */ 155 break; 156 case AUDIO_UNMUTE: 157 bktr->audio_mute_state = FALSE; /* clear mute */ 158 break; 159 default: 160 printf("%s: audio cmd error %02x\n", bktr_name(bktr), 161 cmd); 162 return( -1 ); 163 } 164 165 166 /* Most cards have a simple audio multiplexer to select the 167 * audio source. The I/O_GV card has a more advanced multiplexer 168 * and requires special handling. 169 */ 170 if ( bktr->bt848_card == CARD_IO_GV ) { 171 set_bctv_audio( bktr ); 172 return( 0 ); 173 } 174 175 /* Proceed with the simpler audio multiplexer code for the majority 176 * of Bt848 cards. 177 */ 178 179 /* 180 * Leave the upper bits of the GPIO port alone in case they control 181 * something like the dbx or teletext chips. This doesn't guarantee 182 * success, but follows the rule of least astonishment. 183 */ 184 185 if ( bktr->audio_mute_state == TRUE ) { 186#ifdef BKTR_REVERSEMUTE 187 idx = 0; 188#else 189 idx = 3; 190#endif 191 192 if (bktr->reverse_mute ) 193 idx = 3; 194 else 195 idx = 0; 196 197 } 198 else 199 idx = bktr->audio_mux_select; 200 201 temp = INL(bktr, BKTR_GPIO_DATA) & ~bktr->card.gpio_mux_bits; 202#if defined( AUDIOMUX_DISCOVER ) 203 OUTL(bktr, BKTR_GPIO_DATA, temp | (cmd & 0xff)); 204 printf("%s: cmd: %d audio mux %x temp %x \n", bktr_name(bktr), 205 cmd, bktr->card.audiomuxs[ idx ], temp ); 206#else 207 OUTL(bktr, BKTR_GPIO_DATA, temp | bktr->card.audiomuxs[ idx ]); 208#endif /* AUDIOMUX_DISCOVER */ 209 210 return( 0 ); 211} 212 213 214/* 215 * 216 */ 217void 218temp_mute( bktr_ptr_t bktr, int flag ) 219{ 220 static int muteState = FALSE; 221 222 if ( flag == TRUE ) { 223 muteState = bktr->audio_mute_state; 224 set_audio( bktr, AUDIO_MUTE ); /* prevent 'click' */ 225 } 226 else { 227 tsleep( BKTR_SLEEP, PZERO, "tuning", hz/8 ); 228 if ( muteState == FALSE ) 229 set_audio( bktr, AUDIO_UNMUTE ); 230 } 231} 232 233/* address of BTSC/SAP decoder chip */ 234#define TDA9850_WADDR 0xb6 235#define TDA9850_RADDR 0xb7 236 237 238/* registers in the TDA9850 BTSC/dbx chip */ 239#define CON1ADDR 0x04 240#define CON2ADDR 0x05 241#define CON3ADDR 0x06 242#define CON4ADDR 0x07 243#define ALI1ADDR 0x08 244#define ALI2ADDR 0x09 245#define ALI3ADDR 0x0a 246 247/* 248 * initialise the dbx chip 249 * taken from the Linux bttv driver TDA9850 initialisation code 250 */ 251void 252init_BTSC( bktr_ptr_t bktr ) 253{ 254 i2cWrite(bktr, TDA9850_WADDR, CON1ADDR, 0x08); /* noise threshold st */ 255 i2cWrite(bktr, TDA9850_WADDR, CON2ADDR, 0x08); /* noise threshold sap */ 256 i2cWrite(bktr, TDA9850_WADDR, CON3ADDR, 0x40); /* stereo mode */ 257 i2cWrite(bktr, TDA9850_WADDR, CON4ADDR, 0x07); /* 0 dB input gain? */ 258 i2cWrite(bktr, TDA9850_WADDR, ALI1ADDR, 0x10); /* wideband alignment? */ 259 i2cWrite(bktr, TDA9850_WADDR, ALI2ADDR, 0x10); /* spectral alignment? */ 260 i2cWrite(bktr, TDA9850_WADDR, ALI3ADDR, 0x03); 261} 262 263/* 264 * setup the dbx chip 265 * XXX FIXME: alot of work to be done here, this merely unmutes it. 266 */ 267int 268set_BTSC( bktr_ptr_t bktr, int control ) 269{ 270 return( i2cWrite( bktr, TDA9850_WADDR, CON3ADDR, control ) ); 271} 272 273/* 274 * CARD_GV_BCTV specific functions. 275 */ 276 277#define BCTV_AUDIO_MAIN 0x10 /* main audio program */ 278#define BCTV_AUDIO_SUB 0x20 /* sub audio program */ 279#define BCTV_AUDIO_BOTH 0x30 /* main(L) + sub(R) program */ 280 281#define BCTV_GPIO_REG0 1 282#define BCTV_GPIO_REG1 3 283 284#define BCTV_GR0_AUDIO_MODE 3 285#define BCTV_GR0_AUDIO_MAIN 0 /* main program */ 286#define BCTV_GR0_AUDIO_SUB 3 /* sub program */ 287#define BCTV_GR0_AUDIO_BOTH 1 /* main(L) + sub(R) */ 288#define BCTV_GR0_AUDIO_MUTE 4 /* audio mute */ 289#define BCTV_GR0_AUDIO_MONO 8 /* force mono */ 290 291void 292set_bctv_audio( bktr_ptr_t bktr ) 293{ 294 int data; 295 296 switch (bktr->audio_mux_select) { 297 case 1: /* external */ 298 case 2: /* internal */ 299 bctv_gpio_write(bktr, BCTV_GPIO_REG1, 0); 300 break; 301 default: /* tuner */ 302 bctv_gpio_write(bktr, BCTV_GPIO_REG1, 1); 303 break; 304 } 305/* switch (bktr->audio_sap_select) { */ 306 switch (BCTV_AUDIO_BOTH) { 307 case BCTV_AUDIO_SUB: 308 data = BCTV_GR0_AUDIO_SUB; 309 break; 310 case BCTV_AUDIO_BOTH: 311 data = BCTV_GR0_AUDIO_BOTH; 312 break; 313 case BCTV_AUDIO_MAIN: 314 default: 315 data = BCTV_GR0_AUDIO_MAIN; 316 break; 317 } 318 if (bktr->audio_mute_state == TRUE) 319 data |= BCTV_GR0_AUDIO_MUTE; 320 321 bctv_gpio_write(bktr, BCTV_GPIO_REG0, data); 322 323 return; 324} 325 326/* gpio_data bit assignment */ 327#define BCTV_GPIO_ADDR_MASK 0x000300 328#define BCTV_GPIO_WE 0x000400 329#define BCTV_GPIO_OE 0x000800 330#define BCTV_GPIO_VAL_MASK 0x00f000 331 332#define BCTV_GPIO_PORT_MASK 3 333#define BCTV_GPIO_ADDR_SHIFT 8 334#define BCTV_GPIO_VAL_SHIFT 12 335 336/* gpio_out_en value for read/write */ 337#define BCTV_GPIO_OUT_RMASK 0x000f00 338#define BCTV_GPIO_OUT_WMASK 0x00ff00 339 340#define BCTV_BITS 100 341 342void 343bctv_gpio_write( bktr_ptr_t bktr, int port, int val ) 344{ 345 u_long data, outbits; 346 347 port &= BCTV_GPIO_PORT_MASK; 348 switch (port) { 349 case 1: 350 case 3: 351 data = ((val << BCTV_GPIO_VAL_SHIFT) & BCTV_GPIO_VAL_MASK) | 352 ((port << BCTV_GPIO_ADDR_SHIFT) & BCTV_GPIO_ADDR_MASK) | 353 BCTV_GPIO_WE | BCTV_GPIO_OE; 354 outbits = BCTV_GPIO_OUT_WMASK; 355 break; 356 default: 357 return; 358 } 359 OUTL(bktr, BKTR_GPIO_OUT_EN, 0); 360 OUTL(bktr, BKTR_GPIO_DATA, data); 361 OUTL(bktr, BKTR_GPIO_OUT_EN, outbits); 362 DELAY(BCTV_BITS); 363 OUTL(bktr, BKTR_GPIO_DATA, data & ~BCTV_GPIO_WE); 364 DELAY(BCTV_BITS); 365 OUTL(bktr, BKTR_GPIO_DATA, data); 366 DELAY(BCTV_BITS); 367 OUTL(bktr, BKTR_GPIO_DATA, ~0); 368 OUTL(bktr, BKTR_GPIO_OUT_EN, 0); 369} 370 371/* Not yet used 372int 373bctv_gpio_read( bktr_ptr_t bktr, int port ) 374{ 375 u_long data, outbits, ret; 376 377 port &= BCTV_GPIO_PORT_MASK; 378 switch (port) { 379 case 1: 380 case 3: 381 data = ((port << BCTV_GPIO_ADDR_SHIFT) & BCTV_GPIO_ADDR_MASK) | 382 BCTV_GPIO_WE | BCTV_GPIO_OE; 383 outbits = BCTV_GPIO_OUT_RMASK; 384 break; 385 default: 386 return( -1 ); 387 } 388 OUTL(bktr, BKTR_GPIO_OUT_EN, 0); 389 OUTL(bktr, BKTR_GPIO_DATA, data); 390 OUTL(bktr, BKTR_GPIO_OUT_EN, outbits); 391 DELAY(BCTV_BITS); 392 OUTL(bktr, BKTR_GPIO_DATA, data & ~BCTV_GPIO_OE); 393 DELAY(BCTV_BITS); 394 ret = INL(bktr, BKTR_GPIO_DATA); 395 DELAY(BCTV_BITS); 396 OUTL(bktr, BKTR_GPIO_DATA, data); 397 DELAY(BCTV_BITS); 398 OUTL(bktr, BKTR_GPIO_DATA, ~0); 399 OUTL(bktr, BKTR_GPIO_OUT_EN, 0); 400 return( (ret & BCTV_GPIO_VAL_MASK) >> BCTV_GPIO_VAL_SHIFT ); 401} 402*/ 403 404/* 405 * setup the MSP34xx Stereo Audio Chip 406 * This uses the Auto Configuration Option on MSP3410D and MSP3415D chips 407 * and DBX mode selection for MSP3430G chips. 408 * For MSP3400C support, the full programming sequence is required and is 409 * not yet supported. 410 */ 411 412/* Read the MSP version string */ 413void msp_read_id( bktr_ptr_t bktr ){ 414 int rev1=0, rev2=0; 415 rev1 = msp_dpl_read(bktr, bktr->msp_addr, 0x12, 0x001e); 416 rev2 = msp_dpl_read(bktr, bktr->msp_addr, 0x12, 0x001f); 417 418 sprintf(bktr->msp_version_string, "34%02d%c-%c%d", 419 (rev2>>8)&0xff, (rev1&0xff)+'@', ((rev1>>8)&0xff)+'@', rev2&0x1f); 420 421} 422 423 424/* Configure the MSP chip to Auto-detect the audio format. 425 * For the MSP3430G, we use fast autodetect mode 426 * For the MSP3410/3415 there are two schemes for this 427 * a) Fast autodetection - the chip is put into autodetect mode, and the function 428 * returns immediatly. This works in most cases and is the Default Mode. 429 * b) Slow mode. The function sets the MSP3410/3415 chip, then waits for feedback from 430 * the chip and re-programs it if needed. 431 */ 432void msp_autodetect( bktr_ptr_t bktr ) { 433 int auto_detect, loops; 434 int stereo; 435 436 /* MSP3430G - countries with mono and DBX stereo */ 437 if (strncmp("3430G", bktr->msp_version_string, 5) == 0){ 438 439 msp_dpl_write(bktr, bktr->msp_addr, 0x10, 0x0030,0x2003);/* Enable Auto format detection */ 440 msp_dpl_write(bktr, bktr->msp_addr, 0x10, 0x0020,0x0020);/* Standard Select Reg. = BTSC-Stereo*/ 441 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x000E,0x2403);/* darned if I know */ 442 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0008,0x0320);/* Source select = (St or A) */ 443 /* & Ch. Matrix = St */ 444 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0000,0x7300);/* Set volume to 0db gain */ 445 } 446 447 448 /* MSP3410/MSP3415 - countries with mono, stereo using 2 FM channels and NICAM */ 449 /* FAST sound scheme */ 450 if ( (strncmp("3430G", bktr->msp_version_string, 5) != 0) 451 && (bktr->slow_msp_audio == 0) ){ 452 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0000,0x7300);/* Set volume to 0db gain */ 453 msp_dpl_write(bktr, bktr->msp_addr, 0x10, 0x0020,0x0001);/* Enable Auto format detection */ 454 msp_dpl_write(bktr, bktr->msp_addr, 0x10, 0x0021,0x0001);/* Auto selection of NICAM/MONO mode */ 455 } 456 457 458 /* MSP3410/MSP3415 - European Countries where the fast MSP3410/3415 programming fails */ 459 /* SLOW sound scheme */ 460 if ( (strncmp("3430G", bktr->msp_version_string, 5) != 0) 461 && (bktr->slow_msp_audio == 1) ){ 462 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0000,0x7300);/* Set volume to 0db gain */ 463 msp_dpl_write(bktr, bktr->msp_addr, 0x10, 0x0020,0x0001);/* Enable Auto format detection */ 464 465 /* wait for 0.5s max for terrestrial sound autodetection */ 466 loops = 10; 467 do { 468 DELAY(100000); 469 auto_detect = msp_dpl_read(bktr, bktr->msp_addr, 0x10, 0x007e); 470 loops++; 471 } while (auto_detect > 0xff && loops < 50); 472 if (bootverbose)printf ("%s: Result of autodetect after %dms: %d\n", 473 bktr_name(bktr), loops*10, auto_detect); 474 475 /* Now set the audio baseband processing */ 476 switch (auto_detect) { 477 case 0: /* no TV sound standard detected */ 478 break; 479 case 2: /* M Dual FM */ 480 break; 481 case 3: /* B/G Dual FM; German stereo */ 482 /* Read the stereo detection value from DSP reg 0x0018 */ 483 DELAY(20000); 484 stereo = msp_dpl_read(bktr, bktr->msp_addr, 0x12, 0x0018); 485 if (bootverbose)printf ("%s: Stereo reg 0x18 a: %d\n", 486 bktr_name(bktr), stereo); 487 DELAY(20000); 488 stereo = msp_dpl_read(bktr, bktr->msp_addr, 0x12, 0x0018); 489 if (bootverbose)printf ("%s: Stereo reg 0x18 b: %d\n", 490 bktr_name(bktr), stereo); 491 DELAY(20000); 492 stereo = msp_dpl_read(bktr, bktr->msp_addr, 0x12, 0x0018); 493 if (bootverbose)printf ("%s: Stereo reg 0x18 c: %d\n", 494 bktr_name(bktr), stereo); 495 if (stereo > 0x0100 && stereo < 0x8000) { /* Seems to be stereo */ 496 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0008,0x0020);/* Loudspeaker set stereo*/ 497 /* 498 set spatial effect strength to 50% enlargement 499 set spatial effect mode b, stereo basewidth enlargment only 500 */ 501 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0005,0x3f28); 502 } else if (stereo > 0x8000) { /* bilingual mode */ 503 if (bootverbose) printf ("%s: Bilingual mode detected\n", 504 bktr_name(bktr)); 505 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0008,0x0000);/* Loudspeaker */ 506 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0005,0x0000);/* all spatial effects off */ 507 } else { /* must be mono */ 508 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0008,0x0030);/* Loudspeaker */ 509 /* 510 set spatial effect strength to 50% enlargement 511 set spatial effect mode a, stereo basewidth enlargment 512 and pseudo stereo effect with automatic high-pass filter 513 */ 514 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0005,0x3f08); 515 } 516#if 0 517 /* The reset value for Channel matrix mode is FM/AM and SOUNDA/LEFT */ 518 /* We would like STEREO instead val: 0x0020 */ 519 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0008,0x0020);/* Loudspeaker */ 520 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0009,0x0020);/* Headphone */ 521 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x000a,0x0020);/* SCART1 */ 522 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0041,0x0020);/* SCART2 */ 523 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x000b,0x0020);/* I2S */ 524 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x000c,0x0020);/* Quasi-Peak Detector Source */ 525 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x000e,0x0001); 526#endif 527 break; 528 case 8: /* B/G FM NICAM */ 529 msp_dpl_write(bktr, bktr->msp_addr, 0x10, 0x0021,0x0001);/* Auto selection of NICAM/MONO mode */ 530 break; 531 case 9: /* L_AM NICAM or D/K*/ 532 case 10: /* i-FM NICAM */ 533 break; 534 default: 535 if (bootverbose) printf ("%s: Unknown autodetection result value: %d\n", 536 bktr_name(bktr), auto_detect); 537 } 538 539 } 540 541 542 /* uncomment the following line to enable the MSP34xx 1Khz Tone Generator */ 543 /* turn your speaker volume down low before trying this */ 544 /* msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0014, 0x7f40); */ 545} 546 547/* Read the DPL version string */ 548void dpl_read_id( bktr_ptr_t bktr ){ 549 int rev1=0, rev2=0; 550 rev1 = msp_dpl_read(bktr, bktr->dpl_addr, 0x12, 0x001e); 551 rev2 = msp_dpl_read(bktr, bktr->dpl_addr, 0x12, 0x001f); 552 553 sprintf(bktr->dpl_version_string, "34%02d%c-%c%d", 554 ((rev2>>8)&0xff)-1, (rev1&0xff)+'@', ((rev1>>8)&0xff)+'@', rev2&0x1f); 555} 556 557/* Configure the DPL chip to Auto-detect the audio format */ 558void dpl_autodetect( bktr_ptr_t bktr ) { 559 560 /* The following are empiric values tried from the DPL35xx data sheet */ 561 msp_dpl_write(bktr, bktr->dpl_addr, 0x12, 0x000c,0x0320); /* quasi peak detector source dolby 562 lr 0x03xx; quasi peak detector matrix 563 stereo 0xXX20 */ 564 msp_dpl_write(bktr, bktr->dpl_addr, 0x12, 0x0040,0x0060); /* Surround decoder mode; 565 ADAPTIVE/3D-PANORAMA, that means two 566 speakers and no center speaker, all 567 channels L/R/C/S mixed to L and R */ 568 msp_dpl_write(bktr, bktr->dpl_addr, 0x12, 0x0041,0x0620); /* surround source matrix;I2S2/STEREO*/ 569 msp_dpl_write(bktr, bktr->dpl_addr, 0x12, 0x0042,0x1F00); /* surround delay 31ms max */ 570 msp_dpl_write(bktr, bktr->dpl_addr, 0x12, 0x0043,0x0000); /* automatic surround input balance */ 571 msp_dpl_write(bktr, bktr->dpl_addr, 0x12, 0x0044,0x4000); /* surround spatial effect 50% 572 recommended*/ 573 msp_dpl_write(bktr, bktr->dpl_addr, 0x12, 0x0045,0x5400); /* surround panorama effect 66% 574 recommended with PANORAMA mode 575 in 0x0040 set to panorama */ 576} 577 578