bktr_audio.c revision 1.4
1 /* $NetBSD: bktr_audio.c,v 1.4 2000/05/07 14:43:31 veego 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 56 #ifdef __FreeBSD__ 57 #include <machine/clock.h> /* for DELAY */ 58 #include <pci/pcivar.h> 59 60 #if (__FreeBSD_version >=300000) 61 #include <machine/bus_memio.h> /* for bus space */ 62 #include <machine/bus.h> 63 #include <sys/bus.h> 64 #endif 65 #endif 66 67 #ifdef __NetBSD__ 68 #include <sys/proc.h> 69 #include <dev/ic/bt8xx.h> /* NetBSD location of .h files */ 70 #include <dev/pci/bktr/bktr_reg.h> 71 #include <dev/pci/bktr/bktr_core.h> 72 #include <dev/pci/bktr/bktr_tuner.h> 73 #include <dev/pci/bktr/bktr_card.h> 74 #include <dev/pci/bktr/bktr_audio.h> 75 #else 76 #include <machine/ioctl_meteor.h> /* Traditional location of .h files */ 77 #include <machine/ioctl_bt848.h> /* extensions to ioctl_meteor.h */ 78 #include <dev/bktr/bktr_reg.h> 79 #include <dev/bktr/bktr_core.h> 80 #include <dev/bktr/bktr_tuner.h> 81 #include <dev/bktr/bktr_card.h> 82 #include <dev/bktr/bktr_audio.h> 83 #endif 84 85 /* 86 * Prototypes for the GV_BCTV specific functions. 87 */ 88 void set_bctv_audio( bktr_ptr_t bktr ); 89 void bctv_gpio_write( bktr_ptr_t bktr, int port, int val ); 90 /*int bctv_gpio_read( bktr_ptr_t bktr, int port );*/ /* Not used */ 91 92 93 94 /* 95 * init_audio_devices 96 * Reset any MSP34xx or TDA98xx audio devices. 97 */ 98 void init_audio_devices( bktr_ptr_t bktr ) { 99 100 /* enable stereo if appropriate on TDA audio chip */ 101 if ( bktr->card.dbx ) 102 init_BTSC( bktr ); 103 104 /* reset the MSP34xx stereo audio chip */ 105 if ( bktr->card.msp3400c ) 106 msp_dpl_reset( bktr, bktr->msp_addr ); 107 108 /* reset the DPL35xx dolby audio chip */ 109 if ( bktr->card.dpl3518a ) 110 msp_dpl_reset( bktr, bktr->dpl_addr ); 111 112 } 113 114 115 /* 116 * 117 */ 118 #define AUDIOMUX_DISCOVER_NOT 119 int 120 set_audio( bktr_ptr_t bktr, int cmd ) 121 { 122 u_long temp; 123 volatile u_char idx; 124 125 #if defined( AUDIOMUX_DISCOVER ) 126 if ( cmd >= 200 ) 127 cmd -= 200; 128 else 129 #endif /* AUDIOMUX_DISCOVER */ 130 131 /* check for existance of audio MUXes */ 132 if ( !bktr->card.audiomuxs[ 4 ] ) 133 return( -1 ); 134 135 switch (cmd) { 136 case AUDIO_TUNER: 137 #ifdef BKTR_REVERSEMUTE 138 bktr->audio_mux_select = 3; 139 #else 140 bktr->audio_mux_select = 0; 141 #endif 142 143 if (bktr->reverse_mute ) 144 bktr->audio_mux_select = 0; 145 else 146 bktr->audio_mux_select = 3; 147 148 break; 149 case AUDIO_EXTERN: 150 bktr->audio_mux_select = 1; 151 break; 152 case AUDIO_INTERN: 153 bktr->audio_mux_select = 2; 154 break; 155 case AUDIO_MUTE: 156 bktr->audio_mute_state = TRUE; /* set mute */ 157 break; 158 case AUDIO_UNMUTE: 159 bktr->audio_mute_state = FALSE; /* clear mute */ 160 break; 161 default: 162 printf("bktr: audio cmd error %02x\n", cmd); 163 return( -1 ); 164 } 165 166 167 /* Most cards have a simple audio multiplexer to select the 168 * audio source. The I/O_GV card has a more advanced multiplexer 169 * and requires special handling. 170 */ 171 if ( bktr->bt848_card == CARD_IO_GV ) { 172 set_bctv_audio( bktr ); 173 return( 0 ); 174 } 175 176 /* Proceed with the simpler audio multiplexer code for the majority 177 * of Bt848 cards. 178 */ 179 180 /* 181 * Leave the upper bits of the GPIO port alone in case they control 182 * something like the dbx or teletext chips. This doesn't guarantee 183 * success, but follows the rule of least astonishment. 184 */ 185 186 if ( bktr->audio_mute_state == TRUE ) { 187 #ifdef BKTR_REVERSEMUTE 188 idx = 0; 189 #else 190 idx = 3; 191 #endif 192 193 if (bktr->reverse_mute ) 194 idx = 3; 195 else 196 idx = 0; 197 198 } 199 else 200 idx = bktr->audio_mux_select; 201 202 temp = INL(bktr, BKTR_GPIO_DATA) & ~bktr->card.gpio_mux_bits; 203 #if defined( AUDIOMUX_DISCOVER ) 204 OUTL(bktr, BKTR_GPIO_DATA, temp | (cmd & 0xff)); 205 printf("cmd: %d audio mux %x temp %x \n", 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 */ 217 void 218 temp_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 */ 251 void 252 init_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 */ 267 int 268 set_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 */ 290 291 void 292 set_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 100 341 342 void 343 bctv_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 372 int 373 bctv_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 */ 413 void 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 */ 432 void 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 ("Result of autodetect after %dms: %d\n", loops*10, auto_detect); 473 474 /* Now set the audio baseband processing */ 475 switch (auto_detect) { 476 case 0: /* no TV sound standard detected */ 477 break; 478 case 2: /* M Dual FM */ 479 break; 480 case 3: /* B/G Dual FM; German stereo */ 481 /* Read the stereo detection value from DSP reg 0x0018 */ 482 DELAY(20000); 483 stereo = msp_dpl_read(bktr, bktr->msp_addr, 0x12, 0x0018); 484 if (bootverbose)printf ("Stereo reg 0x18 a: %d\n", stereo); 485 DELAY(20000); 486 stereo = msp_dpl_read(bktr, bktr->msp_addr, 0x12, 0x0018); 487 if (bootverbose)printf ("Stereo reg 0x18 b: %d\n", stereo); 488 DELAY(20000); 489 stereo = msp_dpl_read(bktr, bktr->msp_addr, 0x12, 0x0018); 490 if (bootverbose)printf ("Stereo reg 0x18 c: %d\n", stereo); 491 if (stereo > 0x0100 && stereo < 0x8000) { /* Seems to be stereo */ 492 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0008,0x0020);/* Loudspeaker set stereo*/ 493 /* 494 set spatial effect strength to 50% enlargement 495 set spatial effect mode b, stereo basewidth enlargment only 496 */ 497 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0005,0x3f28); 498 } else if (stereo > 0x8000) { /* bilingual mode */ 499 if (bootverbose) printf ("Bilingual mode detected\n"); 500 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0008,0x0000);/* Loudspeaker */ 501 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0005,0x0000);/* all spatial effects off */ 502 } else { /* must be mono */ 503 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0008,0x0030);/* Loudspeaker */ 504 /* 505 set spatial effect strength to 50% enlargement 506 set spatial effect mode a, stereo basewidth enlargment 507 and pseudo stereo effect with automatic high-pass filter 508 */ 509 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0005,0x3f08); 510 } 511 #if 0 512 /* The reset value for Channel matrix mode is FM/AM and SOUNDA/LEFT */ 513 /* We would like STEREO instead val: 0x0020 */ 514 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0008,0x0020);/* Loudspeaker */ 515 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0009,0x0020);/* Headphone */ 516 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x000a,0x0020);/* SCART1 */ 517 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0041,0x0020);/* SCART2 */ 518 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x000b,0x0020);/* I2S */ 519 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x000c,0x0020);/* Quasi-Peak Detector Source */ 520 msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x000e,0x0001); 521 #endif 522 break; 523 case 8: /* B/G FM NICAM */ 524 msp_dpl_write(bktr, bktr->msp_addr, 0x10, 0x0021,0x0001);/* Auto selection of NICAM/MONO mode */ 525 break; 526 case 9: /* L_AM NICAM or D/K*/ 527 case 10: /* i-FM NICAM */ 528 break; 529 default: 530 if (bootverbose) printf ("Unkown autodetection result value: %d\n", auto_detect); 531 } 532 533 } 534 535 536 /* uncomment the following line to enable the MSP34xx 1Khz Tone Generator */ 537 /* turn your speaker volume down low before trying this */ 538 /* msp_dpl_write(bktr, bktr->msp_addr, 0x12, 0x0014, 0x7f40); */ 539 } 540 541 /* Read the DPL version string */ 542 void dpl_read_id( bktr_ptr_t bktr ){ 543 int rev1=0, rev2=0; 544 rev1 = msp_dpl_read(bktr, bktr->dpl_addr, 0x12, 0x001e); 545 rev2 = msp_dpl_read(bktr, bktr->dpl_addr, 0x12, 0x001f); 546 547 sprintf(bktr->dpl_version_string, "34%02d%c-%c%d", 548 ((rev2>>8)&0xff)-1, (rev1&0xff)+'@', ((rev1>>8)&0xff)+'@', rev2&0x1f); 549 } 550 551 /* Configure the DPL chip to Auto-detect the audio format */ 552 void dpl_autodetect( bktr_ptr_t bktr ) { 553 554 /* The following are empiric values tried from the DPL35xx data sheet */ 555 msp_dpl_write(bktr, bktr->dpl_addr, 0x12, 0x000c,0x0320); /* quasi peak detector source dolby 556 lr 0x03xx; quasi peak detector matrix 557 stereo 0xXX20 */ 558 msp_dpl_write(bktr, bktr->dpl_addr, 0x12, 0x0040,0x0060); /* Surround decoder mode; 559 ADAPTIVE/3D-PANORAMA, that means two 560 speakers and no center speaker, all 561 channels L/R/C/S mixed to L and R */ 562 msp_dpl_write(bktr, bktr->dpl_addr, 0x12, 0x0041,0x0620); /* surround source matrix;I2S2/STEREO*/ 563 msp_dpl_write(bktr, bktr->dpl_addr, 0x12, 0x0042,0x1F00); /* surround delay 31ms max */ 564 msp_dpl_write(bktr, bktr->dpl_addr, 0x12, 0x0043,0x0000); /* automatic surround input balance */ 565 msp_dpl_write(bktr, bktr->dpl_addr, 0x12, 0x0044,0x4000); /* surround spatial effect 50% 566 recommended*/ 567 msp_dpl_write(bktr, bktr->dpl_addr, 0x12, 0x0045,0x5400); /* surround panorama effect 66% 568 recommended with PANORAMA mode 569 in 0x0040 set to panorama */ 570 } 571 572
Indexes created Wed Oct 01 19:09:53 GMT 2025