bktr_audio.c revision 1.2
1 /* $NetBSD: bktr_audio.c,v 1.2 2000/05/07 00:24:33 wiz Exp $ */ 2 3 /* FreeBSD: src/sys/dev/bktr/bktr_audio.c,v 1.2 1999/10/28 13:58:14 roger Exp */ 4 /* 5 * This is part of the Driver for Video Capture Cards (Frame grabbers) 6 * and TV Tuner cards using the Brooktree Bt848, Bt848A, Bt849A, Bt878, Bt879 7 * chipset. 8 * Copyright Roger Hardiman and Amancio Hasty. 9 * 10 * bktr_audio : This deals with controlling the audio on TV cards, 11 * controlling the Audio Multiplexer (audio source selector). 12 * controlling any MSP34xx stereo audio decoders. 13 * controlling any DPL35xx dolby surroud sound audio decoders. 14 * initialising TDA98xx audio devices. 15 * 16 */ 17 18 /* 19 * 1. Redistributions of source code must retain the 20 * Copyright (c) 1997 Amancio Hasty, 1999 Roger Hardiman 21 * All rights reserved. 22 * 23 * Redistribution and use in source and binary forms, with or without 24 * modification, are permitted provided that the following conditions 25 * are met: 26 * 1. Redistributions of source code must retain the above copyright 27 * notice, this list of conditions and the following disclaimer. 28 * 2. Redistributions in binary form must reproduce the above copyright 29 * notice, this list of conditions and the following disclaimer in the 30 * documentation and/or other materials provided with the distribution. 31 * 3. All advertising materials mentioning features or use of this software 32 * must display the following acknowledgement: 33 * This product includes software developed by Amancio Hasty and 34 * Roger Hardiman 35 * 4. The name of the author may not be used to endorse or promote products 36 * derived from this software without specific prior written permission. 37 * 38 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 39 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 40 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 41 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, 42 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 43 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 44 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 45 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 46 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 47 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 48 * POSSIBILITY OF SUCH DAMAGE. 49 */ 50 51 #include <sys/param.h> 52 #include <sys/systm.h> 53 #include <sys/kernel.h> 54 #include <sys/vnode.h> 55 #ifdef __NetBSD__ 56 #include <sys/proc.h> 57 static int bootverbose = 1; 58 #endif 59 60 #ifdef __FreeBSD__ 61 #include <machine/clock.h> /* for DELAY */ 62 #include <pci/pcivar.h> 63 64 #if (__FreeBSD_version >=300000) 65 #include <machine/bus_memio.h> /* for bus space */ 66 #include <machine/bus.h> 67 #include <sys/bus.h> 68 #endif 69 #endif 70 71 #ifdef __NetBSD__ 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> 78 #else 79 #include <machine/ioctl_meteor.h> /* Traditional location of .h files */ 80 #include <machine/ioctl_bt848.h> /* extensions to ioctl_meteor.h */ 81 #include <dev/bktr/bktr_reg.h> 82 #include <dev/bktr/bktr_core.h> 83 #include <dev/bktr/bktr_tuner.h> 84 #include <dev/bktr/bktr_card.h> 85 #include <dev/bktr/bktr_audio.h> 86 #endif 87 88 /* 89 * Prototypes for the GV_BCTV specific functions. 90 */ 91 void set_bctv_audio( bktr_ptr_t bktr ); 92 void bctv_gpio_write( bktr_ptr_t bktr, int port, int val ); 93 /*int bctv_gpio_read( bktr_ptr_t bktr, int port );*/ /* Not used */ 94 95 96 97 /* 98 * init_audio_devices 99 * Reset any MSP34xx or TDA98xx audio devices. 100 */ 101 void init_audio_devices( bktr_ptr_t bktr ) { 102 103 /* enable stereo if appropriate on TDA audio chip */ 104 if ( bktr->card.dbx ) 105 init_BTSC( bktr ); 106 107 /* reset the MSP34xx stereo audio chip */ 108 if ( bktr->card.msp3400c ) 109 msp_dpl_reset( bktr, bktr->msp_addr ); 110 111 /* reset the DPL35xx dolby audio chip */ 112 if ( bktr->card.dpl3518a ) 113 msp_dpl_reset( bktr, bktr->dpl_addr ); 114 115 } 116 117 118 /* 119 * 120 */ 121 #define AUDIOMUX_DISCOVER_NOT 122 int 123 set_audio( bktr_ptr_t bktr, int cmd ) 124 { 125 u_long temp; 126 volatile u_char idx; 127 128 #if defined( AUDIOMUX_DISCOVER ) 129 if ( cmd >= 200 ) 130 cmd -= 200; 131 else 132 #endif /* AUDIOMUX_DISCOVER */ 133 134 /* check for existance of audio MUXes */ 135 if ( !bktr->card.audiomuxs[ 4 ] ) 136 return( -1 ); 137 138 switch (cmd) { 139 case AUDIO_TUNER: 140 #ifdef BKTR_REVERSEMUTE 141 bktr->audio_mux_select = 3; 142 #else 143 bktr->audio_mux_select = 0; 144 #endif 145 146 if (bktr->reverse_mute ) 147 bktr->audio_mux_select = 0; 148 else 149 bktr->audio_mux_select = 3; 150 151 break; 152 case AUDIO_EXTERN: 153 bktr->audio_mux_select = 1; 154 break; 155 case AUDIO_INTERN: 156 bktr->audio_mux_select = 2; 157 break; 158 case AUDIO_MUTE: 159 bktr->audio_mute_state = TRUE; /* set mute */ 160 break; 161 case AUDIO_UNMUTE: 162 bktr->audio_mute_state = FALSE; /* clear mute */ 163 break; 164 default: 165 printf("bktr: audio cmd error %02x\n", cmd); 166 return( -1 ); 167 } 168 169 170 /* 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. 173 */ 174 if ( bktr->bt848_card == CARD_IO_GV ) { 175 set_bctv_audio( bktr ); 176 return( 0 ); 177 } 178 179 /* Proceed with the simpler audio multiplexer code for the majority 180 * of Bt848 cards. 181 */ 182 183 /* 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. 187 */ 188 189 if ( bktr->audio_mute_state == TRUE ) { 190 #ifdef BKTR_REVERSEMUTE 191 idx = 0; 192 #else 193 idx = 3; 194 #endif 195 196 if (bktr->reverse_mute ) 197 idx = 3; 198 else 199 idx = 0; 200 201 } 202 else 203 idx = bktr->audio_mux_select; 204 205 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("cmd: %d audio mux %x temp %x \n", cmd,bktr->card.audiomuxs[ idx ], temp ); 209 #else 210 OUTL(bktr, BKTR_GPIO_DATA, temp | bktr->card.audiomuxs[ idx ]); 211 #endif /* AUDIOMUX_DISCOVER */ 212 213 return( 0 ); 214 } 215 216 217 /* 218 * 219 */ 220 void 221 temp_mute( bktr_ptr_t bktr, int flag ) 222 { 223 static int muteState = FALSE; 224 225 if ( flag == TRUE ) { 226 muteState = bktr->audio_mute_state; 227 set_audio( bktr, AUDIO_MUTE ); /* prevent 'click' */ 228 } 229 else { 230 tsleep( BKTR_SLEEP, PZERO, "tuning", hz/8 ); 231 if ( muteState == FALSE ) 232 set_audio( bktr, AUDIO_UNMUTE ); 233 } 234 } 235 236 /* address of BTSC/SAP decoder chip */ 237 #define TDA9850_WADDR 0xb6 238 #define TDA9850_RADDR 0xb7 239 240 241 /* registers in the TDA9850 BTSC/dbx chip */ 242 #define CON1ADDR 0x04 243 #define CON2ADDR 0x05 244 #define CON3ADDR 0x06 245 #define CON4ADDR 0x07 246 #define ALI1ADDR 0x08 247 #define ALI2ADDR 0x09 248 #define ALI3ADDR 0x0a 249 250 /* 251 * initialise the dbx chip 252 * taken from the Linux bttv driver TDA9850 initialisation code 253 */ 254 void 255 init_BTSC( bktr_ptr_t bktr ) 256 { 257 i2cWrite(bktr, TDA9850_WADDR, CON1ADDR, 0x08); /* noise threshold st */ 258 i2cWrite(bktr, TDA9850_WADDR, CON2ADDR, 0x08); /* noise threshold sap */ 259 i2cWrite(bktr, TDA9850_WADDR, CON3ADDR, 0x40); /* stereo mode */ 260 i2cWrite(bktr, TDA9850_WADDR, CON4ADDR, 0x07); /* 0 dB input gain? */ 261 i2cWrite(bktr, TDA9850_WADDR, ALI1ADDR, 0x10); /* wideband alignment? */ 262 i2cWrite(bktr, TDA9850_WADDR, ALI2ADDR, 0x10); /* spectral alignment? */ 263 i2cWrite(bktr, TDA9850_WADDR, ALI3ADDR, 0x03); 264 } 265 266 /* 267 * setup the dbx chip 268 * XXX FIXME: alot of work to be done here, this merely unmutes it. 269 */ 270 int 271 set_BTSC( bktr_ptr_t bktr, int control ) 272 { 273 return( i2cWrite( bktr, TDA9850_WADDR, CON3ADDR, control ) ); 274 } 275 276 /* 277 * CARD_GV_BCTV specific functions. 278 */ 279 280 #define BCTV_AUDIO_MAIN 0x10 /* main audio program */ 281 #define BCTV_AUDIO_SUB 0x20 /* sub audio program */ 282 #define BCTV_AUDIO_BOTH 0x30 /* main(L) + sub(R) program */ 283 284 #define BCTV_GPIO_REG0 1 285 #define BCTV_GPIO_REG1 3 286 287 #define BCTV_GR0_AUDIO_MODE 3 288 #define BCTV_GR0_AUDIO_MAIN 0 /* main program */ 289 #define BCTV_GR0_AUDIO_SUB 3 /* sub program */ 290 #define BCTV_GR0_AUDIO_BOTH 1 /* main(L) + sub(R) */ 291 #define BCTV_GR0_AUDIO_MUTE 4 /* audio mute */ 292 #define BCTV_GR0_AUDIO_MONO 8 /* force mono */ 293 294 void 295 set_bctv_audio( bktr_ptr_t bktr ) 296 { 297 int data; 298 299 switch (bktr->audio_mux_select) { 300 case 1: /* external */ 301 case 2: /* internal */ 302 bctv_gpio_write(bktr, BCTV_GPIO_REG1, 0); 303 break; 304 default: /* tuner */ 305 bctv_gpio_write(bktr, BCTV_GPIO_REG1, 1); 306 break; 307 } 308 /* switch (bktr->audio_sap_select) { */ 309 switch (BCTV_AUDIO_BOTH) { 310 case BCTV_AUDIO_SUB: 311 data = BCTV_GR0_AUDIO_SUB; 312 break; 313 case BCTV_AUDIO_BOTH: 314 data = BCTV_GR0_AUDIO_BOTH; 315 break; 316 case BCTV_AUDIO_MAIN: 317 default: 318 data = BCTV_GR0_AUDIO_MAIN; 319 break; 320 } 321 if (bktr->audio_mute_state == TRUE) 322 data |= BCTV_GR0_AUDIO_MUTE; 323 324 bctv_gpio_write(bktr, BCTV_GPIO_REG0, data); 325 326 return; 327 } 328 329 /* gpio_data bit assignment */ 330 #define BCTV_GPIO_ADDR_MASK 0x000300 331 #define BCTV_GPIO_WE 0x000400 332 #define BCTV_GPIO_OE 0x000800 333 #define BCTV_GPIO_VAL_MASK 0x00f000 334 335 #define BCTV_GPIO_PORT_MASK 3 336 #define BCTV_GPIO_ADDR_SHIFT 8 337 #define BCTV_GPIO_VAL_SHIFT 12 338 339 /* gpio_out_en value for read/write */ 340 #define BCTV_GPIO_OUT_RMASK 0x000f00 341 #define BCTV_GPIO_OUT_WMASK 0x00ff00 342 343 #define BCTV_BITS 100 344 345 void 346 bctv_gpio_write( bktr_ptr_t bktr, int port, int val ) 347 { 348 u_long data, outbits; 349 350 port &= BCTV_GPIO_PORT_MASK; 351 switch (port) { 352 case 1: 353 case 3: 354 data = ((val << BCTV_GPIO_VAL_SHIFT) & BCTV_GPIO_VAL_MASK) | 355 ((port << BCTV_GPIO_ADDR_SHIFT) & BCTV_GPIO_ADDR_MASK) | 356 BCTV_GPIO_WE | BCTV_GPIO_OE; 357 outbits = BCTV_GPIO_OUT_WMASK; 358 break; 359 default: 360 return; 361 } 362 OUTL(bktr, BKTR_GPIO_OUT_EN, 0); 363 OUTL(bktr, BKTR_GPIO_DATA, data); 364 OUTL(bktr, BKTR_GPIO_OUT_EN, outbits); 365 DELAY(BCTV_BITS); 366 OUTL(bktr, BKTR_GPIO_DATA, data & ~BCTV_GPIO_WE); 367 DELAY(BCTV_BITS); 368 OUTL(bktr, BKTR_GPIO_DATA, data); 369 DELAY(BCTV_BITS); 370 OUTL(bktr, BKTR_GPIO_DATA, ~0); 371 OUTL(bktr, BKTR_GPIO_OUT_EN, 0); 372 } 373 374 /* Not yet used 375 int 376 bctv_gpio_read( bktr_ptr_t bktr, int port ) 377 { 378 u_long data, outbits, ret; 379 380 port &= BCTV_GPIO_PORT_MASK; 381 switch (port) { 382 case 1: 383 case 3: 384 data = ((port << BCTV_GPIO_ADDR_SHIFT) & BCTV_GPIO_ADDR_MASK) | 385 BCTV_GPIO_WE | BCTV_GPIO_OE; 386 outbits = BCTV_GPIO_OUT_RMASK; 387 break; 388 default: 389 return( -1 ); 390 } 391 OUTL(bktr, BKTR_GPIO_OUT_EN, 0); 392 OUTL(bktr, BKTR_GPIO_DATA, data); 393 OUTL(bktr, BKTR_GPIO_OUT_EN, outbits); 394 DELAY(BCTV_BITS); 395 OUTL(bktr, BKTR_GPIO_DATA, data & ~BCTV_GPIO_OE); 396 DELAY(BCTV_BITS); 397 ret = INL(bktr, BKTR_GPIO_DATA); 398 DELAY(BCTV_BITS); 399 OUTL(bktr, BKTR_GPIO_DATA, data); 400 DELAY(BCTV_BITS); 401 OUTL(bktr, BKTR_GPIO_DATA, ~0); 402 OUTL(bktr, BKTR_GPIO_OUT_EN, 0); 403 return( (ret & BCTV_GPIO_VAL_MASK) >> BCTV_GPIO_VAL_SHIFT ); 404 } 405 */ 406 407 /* 408 * setup the MSP34xx Stereo Audio Chip 409 * This uses the Auto Configuration Option on MSP3410D and MSP3415D chips 410 * and DBX mode selection for MSP3430G chips. 411 * For MSP3400C support, the full programming sequence is required and is 412 * not yet supported. 413 */ 414 415 /* Read the MSP version string */ 416 void msp_read_id( bktr_ptr_t bktr ){ 417 int rev1=0, rev2=0; 418 rev1 = msp_dpl_read(bktr, bktr->msp_addr, 0x12, 0x001e); 419 rev2 = msp_dpl_read(bktr, bktr->msp_addr, 0x12, 0x001f); 420 421 sprintf(bktr->msp_version_string, "34%02d%c-%c%d", 422 (rev2>>8)&0xff, (rev1&0xff)+'@', ((rev1>>8)&0xff)+'@', rev2&0x1f); 423 424 } 425 426 427 /* Configure the MSP chip to Auto-detect the audio format. 428 * For the MSP3430G, we use fast autodetect mode 429 * For the MSP3410/3415 there are two schemes for this 430 * a) Fast autodetection - the chip is put into autodetect mode, and the function 431 * returns immediatly. This works in most cases and is the Default Mode. 432 * b) Slow mode. The function sets the MSP3410/3415 chip, then waits for feedback from 433 * the chip and re-programs it if needed. 434 */ 435 void msp_autodetect( bktr_ptr_t bktr ) { 436 int auto_detect, loops; 437 int stereo; 438 439 /* MSP3430G - countries with mono and DBX stereo */ 440 if (strncmp("3430G", bktr->msp_version_string, 5) == 0){ 441 442 msp_dpl_write(bktr, bktr->msp_addr, 0x10, 0x0030,0x2003);/* Enable Auto format detection */ 443 msp_dpl_write(bktr, bktr->msp_addr, 0x10, 0x0020,0x0020);/* Standard Select Reg. = BTSC-Stereo*/ 444 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x000E,0x2403);/* darned if I know */ 445 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0008,0x0320);/* Source select = (St or A) */ 446 /* & Ch. Matrix = St */ 447 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0000,0x7300);/* Set volume to 0db gain */ 448 } 449 450 451 /* MSP3410/MSP3415 - countries with mono, stereo using 2 FM channels and NICAM */ 452 /* FAST sound scheme */ 453 if ( (strncmp("3430G", bktr->msp_version_string, 5) != 0) 454 && (bktr->slow_msp_audio == 0) ){ 455 if(bootverbose)printf("inside fast MSP autodetect code\n"); 456 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0000,0x7300);/* Set volume to 0db gain */ 457 msp_dpl_write(bktr, bktr->msp_addr, 0x10, 0x0020,0x0001);/* Enable Auto format detection */ 458 msp_dpl_write(bktr, bktr->msp_addr, 0x10, 0x0021,0x0001);/* Auto selection of NICAM/MONO mode */ 459 } 460 461 462 /* MSP3410/MSP3415 - European Countries where the fast MSP3410/3415 programming fails */ 463 /* SLOW sound scheme */ 464 if ( (strncmp("3430G", bktr->msp_version_string, 5) != 0) 465 && (bktr->slow_msp_audio == 1) ){ 466 if (bootverbose)printf("inside slow MSP autodetect code\n"); 467 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0000,0x7300);/* Set volume to 0db gain */ 468 msp_dpl_write(bktr, bktr->msp_addr, 0x10, 0x0020,0x0001);/* Enable Auto format detection */ 469 470 /* wait for 0.5s max for terrestrial sound autodetection */ 471 loops = 10; 472 do { 473 DELAY(100000); 474 auto_detect = msp_dpl_read(bktr, bktr->msp_addr, 0x10, 0x007e); 475 loops++; 476 } while (auto_detect > 0xff && loops < 50); 477 if (bootverbose)printf ("Result of autodetect after %dms: %d\n", loops*10, auto_detect); 478 479 /* Now set the audio baseband processing */ 480 switch (auto_detect) { 481 case 0: /* no TV sound standard detected */ 482 break; 483 case 2: /* M Dual FM */ 484 break; 485 case 3: /* B/G Dual FM; German stereo */ 486 /* Read the stereo detection value from DSP reg 0x0018 */ 487 DELAY(20000); 488 stereo = msp_dpl_read(bktr, bktr->msp_addr, 0x12, 0x0018); 489 if (bootverbose)printf ("Stereo reg 0x18 a: %d\n", stereo); 490 DELAY(20000); 491 stereo = msp_dpl_read(bktr, bktr->msp_addr, 0x12, 0x0018); 492 if (bootverbose)printf ("Stereo reg 0x18 b: %d\n", stereo); 493 DELAY(20000); 494 stereo = msp_dpl_read(bktr, bktr->msp_addr, 0x12, 0x0018); 495 if (bootverbose)printf ("Stereo reg 0x18 c: %d\n", stereo); 496 if (stereo > 0x0100 && stereo < 0x8000) { /* Seems to be stereo */ 497 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0008,0x0020);/* Loudspeaker set stereo*/ 498 /* 499 set spatial effect strength to 50% enlargement 500 set spatial effect mode b, stereo basewidth enlargment only 501 */ 502 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0005,0x3f28); 503 } else if (stereo > 0x8000) { /* bilingual mode */ 504 if (bootverbose) printf ("Bilingual mode detected\n"); 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 ("Unkown autodetection result value: %d\n", auto_detect); 536 } 537 538 } 539 540 541 /* uncomment the following line to enable the MSP34xx 1Khz Tone Generator */ 542 /* turn your speaker volume down low before trying this */ 543 /* msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0014, 0x7f40); */ 544 } 545 546 /* Read the DPL version string */ 547 void dpl_read_id( bktr_ptr_t bktr ){ 548 int rev1=0, rev2=0; 549 rev1 = msp_dpl_read(bktr, bktr->dpl_addr, 0x12, 0x001e); 550 rev2 = msp_dpl_read(bktr, bktr->dpl_addr, 0x12, 0x001f); 551 552 sprintf(bktr->dpl_version_string, "34%02d%c-%c%d", 553 ((rev2>>8)&0xff)-1, (rev1&0xff)+'@', ((rev1>>8)&0xff)+'@', rev2&0x1f); 554 } 555 556 /* Configure the DPL chip to Auto-detect the audio format */ 557 void dpl_autodetect( bktr_ptr_t bktr ) { 558 559 /* The following are empiric values tried from the DPL35xx data sheet */ 560 msp_dpl_write(bktr, bktr->dpl_addr, 0x12, 0x000c,0x0320); /* quasi peak detector source dolby 561 lr 0x03xx; quasi peak detector matrix 562 stereo 0xXX20 */ 563 msp_dpl_write(bktr, bktr->dpl_addr, 0x12, 0x0040,0x0060); /* Surround decoder mode; 564 ADAPTIVE/3D-PANORAMA, that means two 565 speakers and no center speaker, all 566 channels L/R/C/S mixed to L and R */ 567 msp_dpl_write(bktr, bktr->dpl_addr, 0x12, 0x0041,0x0620); /* surround source matrix;I2S2/STEREO*/ 568 msp_dpl_write(bktr, bktr->dpl_addr, 0x12, 0x0042,0x1F00); /* surround delay 31ms max */ 569 msp_dpl_write(bktr, bktr->dpl_addr, 0x12, 0x0043,0x0000); /* automatic surround input balance */ 570 msp_dpl_write(bktr, bktr->dpl_addr, 0x12, 0x0044,0x4000); /* surround spatial effect 50% 571 recommended*/ 572 msp_dpl_write(bktr, bktr->dpl_addr, 0x12, 0x0045,0x5400); /* surround panorama effect 66% 573 recommended with PANORAMA mode 574 in 0x0040 set to panorama */ 575 } 576 577
Indexes created Wed Oct 01 15:09:59 GMT 2025