1 /* 2 * Copyright (c) 1999 by Uros Bizjak <uros@kss-loka.si> 3 * Takashi Iwai <tiwai@suse.de> 4 * 5 * SB16ASP/AWE32 CSP control 6 * 7 * CSP microcode loader: 8 * alsa-tools/sb16_csp/ 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License as published by 12 * the Free Software Foundation; either version 2 of the License, or 13 * (at your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 * GNU General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public License 21 * along with this program; if not, write to the Free Software 22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 23 * 24 */ 25 26 #include <linux/delay.h> 27 #include <linux/init.h> 28 #include <linux/slab.h> 29 #include <linux/module.h> 30 #include <sound/core.h> 31 #include <sound/control.h> 32 #include <sound/info.h> 33 #include <sound/sb16_csp.h> 34 #include <sound/initval.h> 35 36 MODULE_AUTHOR("Uros Bizjak <uros@kss-loka.si>"); 37 MODULE_DESCRIPTION("ALSA driver for SB16 Creative Signal Processor"); 38 MODULE_LICENSE("GPL"); 39 MODULE_FIRMWARE("sb16/mulaw_main.csp"); 40 MODULE_FIRMWARE("sb16/alaw_main.csp"); 41 MODULE_FIRMWARE("sb16/ima_adpcm_init.csp"); 42 MODULE_FIRMWARE("sb16/ima_adpcm_playback.csp"); 43 MODULE_FIRMWARE("sb16/ima_adpcm_capture.csp"); 44 45 #ifdef SNDRV_LITTLE_ENDIAN 46 #define CSP_HDR_VALUE(a,b,c,d) ((a) | ((b)<<8) | ((c)<<16) | ((d)<<24)) 47 #else 48 #define CSP_HDR_VALUE(a,b,c,d) ((d) | ((c)<<8) | ((b)<<16) | ((a)<<24)) 49 #endif 50 51 #define RIFF_HEADER CSP_HDR_VALUE('R', 'I', 'F', 'F') 52 #define CSP__HEADER CSP_HDR_VALUE('C', 'S', 'P', ' ') 53 #define LIST_HEADER CSP_HDR_VALUE('L', 'I', 'S', 'T') 54 #define FUNC_HEADER CSP_HDR_VALUE('f', 'u', 'n', 'c') 55 #define CODE_HEADER CSP_HDR_VALUE('c', 'o', 'd', 'e') 56 #define INIT_HEADER CSP_HDR_VALUE('i', 'n', 'i', 't') 57 #define MAIN_HEADER CSP_HDR_VALUE('m', 'a', 'i', 'n') 58 59 /* 60 * RIFF data format 61 */ 62 struct riff_header { 63 __u32 name; 64 __u32 len; 65 }; 66 67 struct desc_header { 68 struct riff_header info; 69 __u16 func_nr; 70 __u16 VOC_type; 71 __u16 flags_play_rec; 72 __u16 flags_16bit_8bit; 73 __u16 flags_stereo_mono; 74 __u16 flags_rates; 75 }; 76 77 /* 78 * prototypes 79 */ 80 static void snd_sb_csp_free(struct snd_hwdep *hw); 81 static int snd_sb_csp_open(struct snd_hwdep * hw, struct file *file); 82 static int snd_sb_csp_ioctl(struct snd_hwdep * hw, struct file *file, unsigned int cmd, unsigned long arg); 83 static int snd_sb_csp_release(struct snd_hwdep * hw, struct file *file); 84 85 static int csp_detect(struct snd_sb *chip, int *version); 86 static int set_codec_parameter(struct snd_sb *chip, unsigned char par, unsigned char val); 87 static int set_register(struct snd_sb *chip, unsigned char reg, unsigned char val); 88 static int read_register(struct snd_sb *chip, unsigned char reg); 89 static int set_mode_register(struct snd_sb *chip, unsigned char mode); 90 static int get_version(struct snd_sb *chip); 91 92 static int snd_sb_csp_riff_load(struct snd_sb_csp * p, 93 struct snd_sb_csp_microcode __user * code); 94 static int snd_sb_csp_unload(struct snd_sb_csp * p); 95 static int snd_sb_csp_load_user(struct snd_sb_csp * p, const unsigned char __user *buf, int size, int load_flags); 96 static int snd_sb_csp_autoload(struct snd_sb_csp * p, int pcm_sfmt, int play_rec_mode); 97 static int snd_sb_csp_check_version(struct snd_sb_csp * p); 98 99 static int snd_sb_csp_use(struct snd_sb_csp * p); 100 static int snd_sb_csp_unuse(struct snd_sb_csp * p); 101 static int snd_sb_csp_start(struct snd_sb_csp * p, int sample_width, int channels); 102 static int snd_sb_csp_stop(struct snd_sb_csp * p); 103 static int snd_sb_csp_pause(struct snd_sb_csp * p); 104 static int snd_sb_csp_restart(struct snd_sb_csp * p); 105 106 static int snd_sb_qsound_build(struct snd_sb_csp * p); 107 static void snd_sb_qsound_destroy(struct snd_sb_csp * p); 108 static int snd_sb_csp_qsound_transfer(struct snd_sb_csp * p); 109 110 static int init_proc_entry(struct snd_sb_csp * p, int device); 111 static void info_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer); 112 113 /* 114 * Detect CSP chip and create a new instance 115 */ 116 int snd_sb_csp_new(struct snd_sb *chip, int device, struct snd_hwdep ** rhwdep) 117 { 118 struct snd_sb_csp *p; 119 int uninitialized_var(version); 120 int err; 121 struct snd_hwdep *hw; 122 123 if (rhwdep) 124 *rhwdep = NULL; 125 126 if (csp_detect(chip, &version)) 127 return -ENODEV; 128 129 if ((err = snd_hwdep_new(chip->card, "SB16-CSP", device, &hw)) < 0) 130 return err; 131 132 if ((p = kzalloc(sizeof(*p), GFP_KERNEL)) == NULL) { 133 snd_device_free(chip->card, hw); 134 return -ENOMEM; 135 } 136 p->chip = chip; 137 p->version = version; 138 139 /* CSP operators */ 140 p->ops.csp_use = snd_sb_csp_use; 141 p->ops.csp_unuse = snd_sb_csp_unuse; 142 p->ops.csp_autoload = snd_sb_csp_autoload; 143 p->ops.csp_start = snd_sb_csp_start; 144 p->ops.csp_stop = snd_sb_csp_stop; 145 p->ops.csp_qsound_transfer = snd_sb_csp_qsound_transfer; 146 147 mutex_init(&p->access_mutex); 148 sprintf(hw->name, "CSP v%d.%d", (version >> 4), (version & 0x0f)); 149 hw->iface = SNDRV_HWDEP_IFACE_SB16CSP; 150 hw->private_data = p; 151 hw->private_free = snd_sb_csp_free; 152 153 /* operators - only write/ioctl */ 154 hw->ops.open = snd_sb_csp_open; 155 hw->ops.ioctl = snd_sb_csp_ioctl; 156 hw->ops.release = snd_sb_csp_release; 157 158 /* create a proc entry */ 159 init_proc_entry(p, device); 160 if (rhwdep) 161 *rhwdep = hw; 162 return 0; 163 } 164 165 /* 166 * free_private for hwdep instance 167 */ 168 static void snd_sb_csp_free(struct snd_hwdep *hwdep) 169 { 170 int i; 171 struct snd_sb_csp *p = hwdep->private_data; 172 if (p) { 173 if (p->running & SNDRV_SB_CSP_ST_RUNNING) 174 snd_sb_csp_stop(p); 175 for (i = 0; i < ARRAY_SIZE(p->csp_programs); ++i) 176 release_firmware(p->csp_programs[i]); 177 kfree(p); 178 } 179 } 180 181 /* ------------------------------ */ 182 183 /* 184 * open the device exclusively 185 */ 186 static int snd_sb_csp_open(struct snd_hwdep * hw, struct file *file) 187 { 188 struct snd_sb_csp *p = hw->private_data; 189 return (snd_sb_csp_use(p)); 190 } 191 192 /* 193 * ioctl for hwdep device: 194 */ 195 static int snd_sb_csp_ioctl(struct snd_hwdep * hw, struct file *file, unsigned int cmd, unsigned long arg) 196 { 197 struct snd_sb_csp *p = hw->private_data; 198 struct snd_sb_csp_info info; 199 struct snd_sb_csp_start start_info; 200 int err; 201 202 if (snd_BUG_ON(!p)) 203 return -EINVAL; 204 205 if (snd_sb_csp_check_version(p)) 206 return -ENODEV; 207 208 switch (cmd) { 209 /* get information */ 210 case SNDRV_SB_CSP_IOCTL_INFO: 211 *info.codec_name = *p->codec_name; 212 info.func_nr = p->func_nr; 213 info.acc_format = p->acc_format; 214 info.acc_channels = p->acc_channels; 215 info.acc_width = p->acc_width; 216 info.acc_rates = p->acc_rates; 217 info.csp_mode = p->mode; 218 info.run_channels = p->run_channels; 219 info.run_width = p->run_width; 220 info.version = p->version; 221 info.state = p->running; 222 if (copy_to_user((void __user *)arg, &info, sizeof(info))) 223 err = -EFAULT; 224 else 225 err = 0; 226 break; 227 228 /* load CSP microcode */ 229 case SNDRV_SB_CSP_IOCTL_LOAD_CODE: 230 err = (p->running & SNDRV_SB_CSP_ST_RUNNING ? 231 -EBUSY : snd_sb_csp_riff_load(p, (struct snd_sb_csp_microcode __user *) arg)); 232 break; 233 case SNDRV_SB_CSP_IOCTL_UNLOAD_CODE: 234 err = (p->running & SNDRV_SB_CSP_ST_RUNNING ? 235 -EBUSY : snd_sb_csp_unload(p)); 236 break; 237 238 /* change CSP running state */ 239 case SNDRV_SB_CSP_IOCTL_START: 240 if (copy_from_user(&start_info, (void __user *) arg, sizeof(start_info))) 241 err = -EFAULT; 242 else 243 err = snd_sb_csp_start(p, start_info.sample_width, start_info.channels); 244 break; 245 case SNDRV_SB_CSP_IOCTL_STOP: 246 err = snd_sb_csp_stop(p); 247 break; 248 case SNDRV_SB_CSP_IOCTL_PAUSE: 249 err = snd_sb_csp_pause(p); 250 break; 251 case SNDRV_SB_CSP_IOCTL_RESTART: 252 err = snd_sb_csp_restart(p); 253 break; 254 default: 255 err = -ENOTTY; 256 break; 257 } 258 259 return err; 260 } 261 262 /* 263 * close the device 264 */ 265 static int snd_sb_csp_release(struct snd_hwdep * hw, struct file *file) 266 { 267 struct snd_sb_csp *p = hw->private_data; 268 return (snd_sb_csp_unuse(p)); 269 } 270 271 /* ------------------------------ */ 272 273 /* 274 * acquire device 275 */ 276 static int snd_sb_csp_use(struct snd_sb_csp * p) 277 { 278 mutex_lock(&p->access_mutex); 279 if (p->used) { 280 mutex_unlock(&p->access_mutex); 281 return -EAGAIN; 282 } 283 p->used++; 284 mutex_unlock(&p->access_mutex); 285 286 return 0; 287 288 } 289 290 /* 291 * release device 292 */ 293 static int snd_sb_csp_unuse(struct snd_sb_csp * p) 294 { 295 mutex_lock(&p->access_mutex); 296 p->used--; 297 mutex_unlock(&p->access_mutex); 298 299 return 0; 300 } 301 302 /* 303 * load microcode via ioctl: 304 * code is user-space pointer 305 */ 306 static int snd_sb_csp_riff_load(struct snd_sb_csp * p, 307 struct snd_sb_csp_microcode __user * mcode) 308 { 309 struct snd_sb_csp_mc_header info; 310 311 unsigned char __user *data_ptr; 312 unsigned char __user *data_end; 313 unsigned short func_nr = 0; 314 315 struct riff_header file_h, item_h, code_h; 316 __u32 item_type; 317 struct desc_header funcdesc_h; 318 319 unsigned long flags; 320 int err; 321 322 if (copy_from_user(&info, mcode, sizeof(info))) 323 return -EFAULT; 324 data_ptr = mcode->data; 325 326 if (copy_from_user(&file_h, data_ptr, sizeof(file_h))) 327 return -EFAULT; 328 if ((file_h.name != RIFF_HEADER) || 329 (le32_to_cpu(file_h.len) >= SNDRV_SB_CSP_MAX_MICROCODE_FILE_SIZE - sizeof(file_h))) { 330 snd_printd("%s: Invalid RIFF header\n", __func__); 331 return -EINVAL; 332 } 333 data_ptr += sizeof(file_h); 334 data_end = data_ptr + le32_to_cpu(file_h.len); 335 336 if (copy_from_user(&item_type, data_ptr, sizeof(item_type))) 337 return -EFAULT; 338 if (item_type != CSP__HEADER) { 339 snd_printd("%s: Invalid RIFF file type\n", __func__); 340 return -EINVAL; 341 } 342 data_ptr += sizeof (item_type); 343 344 for (; data_ptr < data_end; data_ptr += le32_to_cpu(item_h.len)) { 345 if (copy_from_user(&item_h, data_ptr, sizeof(item_h))) 346 return -EFAULT; 347 data_ptr += sizeof(item_h); 348 if (item_h.name != LIST_HEADER) 349 continue; 350 351 if (copy_from_user(&item_type, data_ptr, sizeof(item_type))) 352 return -EFAULT; 353 switch (item_type) { 354 case FUNC_HEADER: 355 if (copy_from_user(&funcdesc_h, data_ptr + sizeof(item_type), sizeof(funcdesc_h))) 356 return -EFAULT; 357 func_nr = le16_to_cpu(funcdesc_h.func_nr); 358 break; 359 case CODE_HEADER: 360 if (func_nr != info.func_req) 361 break; /* not required function, try next */ 362 data_ptr += sizeof(item_type); 363 364 /* destroy QSound mixer element */ 365 if (p->mode == SNDRV_SB_CSP_MODE_QSOUND) { 366 snd_sb_qsound_destroy(p); 367 } 368 /* Clear all flags */ 369 p->running = 0; 370 p->mode = 0; 371 372 /* load microcode blocks */ 373 for (;;) { 374 if (data_ptr >= data_end) 375 return -EINVAL; 376 if (copy_from_user(&code_h, data_ptr, sizeof(code_h))) 377 return -EFAULT; 378 379 /* init microcode blocks */ 380 if (code_h.name != INIT_HEADER) 381 break; 382 data_ptr += sizeof(code_h); 383 err = snd_sb_csp_load_user(p, data_ptr, le32_to_cpu(code_h.len), 384 SNDRV_SB_CSP_LOAD_INITBLOCK); 385 if (err) 386 return err; 387 data_ptr += le32_to_cpu(code_h.len); 388 } 389 /* main microcode block */ 390 if (copy_from_user(&code_h, data_ptr, sizeof(code_h))) 391 return -EFAULT; 392 393 if (code_h.name != MAIN_HEADER) { 394 snd_printd("%s: Missing 'main' microcode\n", __func__); 395 return -EINVAL; 396 } 397 data_ptr += sizeof(code_h); 398 err = snd_sb_csp_load_user(p, data_ptr, 399 le32_to_cpu(code_h.len), 0); 400 if (err) 401 return err; 402 403 /* fill in codec header */ 404 strlcpy(p->codec_name, info.codec_name, sizeof(p->codec_name)); 405 p->func_nr = func_nr; 406 p->mode = le16_to_cpu(funcdesc_h.flags_play_rec); 407 switch (le16_to_cpu(funcdesc_h.VOC_type)) { 408 case 0x0001: /* QSound decoder */ 409 if (le16_to_cpu(funcdesc_h.flags_play_rec) == SNDRV_SB_CSP_MODE_DSP_WRITE) { 410 if (snd_sb_qsound_build(p) == 0) 411 /* set QSound flag and clear all other mode flags */ 412 p->mode = SNDRV_SB_CSP_MODE_QSOUND; 413 } 414 p->acc_format = 0; 415 break; 416 case 0x0006: /* A Law codec */ 417 p->acc_format = SNDRV_PCM_FMTBIT_A_LAW; 418 break; 419 case 0x0007: /* Mu Law codec */ 420 p->acc_format = SNDRV_PCM_FMTBIT_MU_LAW; 421 break; 422 case 0x0011: /* what Creative thinks is IMA ADPCM codec */ 423 case 0x0200: /* Creative ADPCM codec */ 424 p->acc_format = SNDRV_PCM_FMTBIT_IMA_ADPCM; 425 break; 426 case 201: /* Text 2 Speech decoder */ 427 /* TODO: Text2Speech handling routines */ 428 p->acc_format = 0; 429 break; 430 case 0x0202: /* Fast Speech 8 codec */ 431 case 0x0203: /* Fast Speech 10 codec */ 432 p->acc_format = SNDRV_PCM_FMTBIT_SPECIAL; 433 break; 434 default: /* other codecs are unsupported */ 435 p->acc_format = p->acc_width = p->acc_rates = 0; 436 p->mode = 0; 437 snd_printd("%s: Unsupported CSP codec type: 0x%04x\n", 438 __func__, 439 le16_to_cpu(funcdesc_h.VOC_type)); 440 return -EINVAL; 441 } 442 p->acc_channels = le16_to_cpu(funcdesc_h.flags_stereo_mono); 443 p->acc_width = le16_to_cpu(funcdesc_h.flags_16bit_8bit); 444 p->acc_rates = le16_to_cpu(funcdesc_h.flags_rates); 445 446 /* Decouple CSP from IRQ and DMAREQ lines */ 447 spin_lock_irqsave(&p->chip->reg_lock, flags); 448 set_mode_register(p->chip, 0xfc); 449 set_mode_register(p->chip, 0x00); 450 spin_unlock_irqrestore(&p->chip->reg_lock, flags); 451 452 /* finished loading successfully */ 453 p->running = SNDRV_SB_CSP_ST_LOADED; /* set LOADED flag */ 454 return 0; 455 } 456 } 457 snd_printd("%s: Function #%d not found\n", __func__, info.func_req); 458 return -EINVAL; 459 } 460 461 /* 462 * unload CSP microcode 463 */ 464 static int snd_sb_csp_unload(struct snd_sb_csp * p) 465 { 466 if (p->running & SNDRV_SB_CSP_ST_RUNNING) 467 return -EBUSY; 468 if (!(p->running & SNDRV_SB_CSP_ST_LOADED)) 469 return -ENXIO; 470 471 /* clear supported formats */ 472 p->acc_format = 0; 473 p->acc_channels = p->acc_width = p->acc_rates = 0; 474 /* destroy QSound mixer element */ 475 if (p->mode == SNDRV_SB_CSP_MODE_QSOUND) { 476 snd_sb_qsound_destroy(p); 477 } 478 /* clear all flags */ 479 p->running = 0; 480 p->mode = 0; 481 return 0; 482 } 483 484 /* 485 * send command sequence to DSP 486 */ 487 static inline int command_seq(struct snd_sb *chip, const unsigned char *seq, int size) 488 { 489 int i; 490 for (i = 0; i < size; i++) { 491 if (!snd_sbdsp_command(chip, seq[i])) 492 return -EIO; 493 } 494 return 0; 495 } 496 497 /* 498 * set CSP codec parameter 499 */ 500 static int set_codec_parameter(struct snd_sb *chip, unsigned char par, unsigned char val) 501 { 502 unsigned char dsp_cmd[3]; 503 504 dsp_cmd[0] = 0x05; /* CSP set codec parameter */ 505 dsp_cmd[1] = val; /* Parameter value */ 506 dsp_cmd[2] = par; /* Parameter */ 507 command_seq(chip, dsp_cmd, 3); 508 snd_sbdsp_command(chip, 0x03); /* DSP read? */ 509 if (snd_sbdsp_get_byte(chip) != par) 510 return -EIO; 511 return 0; 512 } 513 514 /* 515 * set CSP register 516 */ 517 static int set_register(struct snd_sb *chip, unsigned char reg, unsigned char val) 518 { 519 unsigned char dsp_cmd[3]; 520 521 dsp_cmd[0] = 0x0e; /* CSP set register */ 522 dsp_cmd[1] = reg; /* CSP Register */ 523 dsp_cmd[2] = val; /* value */ 524 return command_seq(chip, dsp_cmd, 3); 525 } 526 527 /* 528 * read CSP register 529 * return < 0 -> error 530 */ 531 static int read_register(struct snd_sb *chip, unsigned char reg) 532 { 533 unsigned char dsp_cmd[2]; 534 535 dsp_cmd[0] = 0x0f; /* CSP read register */ 536 dsp_cmd[1] = reg; /* CSP Register */ 537 command_seq(chip, dsp_cmd, 2); 538 return snd_sbdsp_get_byte(chip); /* Read DSP value */ 539 } 540 541 /* 542 * set CSP mode register 543 */ 544 static int set_mode_register(struct snd_sb *chip, unsigned char mode) 545 { 546 unsigned char dsp_cmd[2]; 547 548 dsp_cmd[0] = 0x04; /* CSP set mode register */ 549 dsp_cmd[1] = mode; /* mode */ 550 return command_seq(chip, dsp_cmd, 2); 551 } 552 553 /* 554 * Detect CSP 555 * return 0 if CSP exists. 556 */ 557 static int csp_detect(struct snd_sb *chip, int *version) 558 { 559 unsigned char csp_test1, csp_test2; 560 unsigned long flags; 561 int result = -ENODEV; 562 563 spin_lock_irqsave(&chip->reg_lock, flags); 564 565 set_codec_parameter(chip, 0x00, 0x00); 566 set_mode_register(chip, 0xfc); /* 0xfc = ?? */ 567 568 csp_test1 = read_register(chip, 0x83); 569 set_register(chip, 0x83, ~csp_test1); 570 csp_test2 = read_register(chip, 0x83); 571 if (csp_test2 != (csp_test1 ^ 0xff)) 572 goto __fail; 573 574 set_register(chip, 0x83, csp_test1); 575 csp_test2 = read_register(chip, 0x83); 576 if (csp_test2 != csp_test1) 577 goto __fail; 578 579 set_mode_register(chip, 0x00); /* 0x00 = ? */ 580 581 *version = get_version(chip); 582 snd_sbdsp_reset(chip); /* reset DSP after getversion! */ 583 if (*version >= 0x10 && *version <= 0x1f) 584 result = 0; /* valid version id */ 585 586 __fail: 587 spin_unlock_irqrestore(&chip->reg_lock, flags); 588 return result; 589 } 590 591 /* 592 * get CSP version number 593 */ 594 static int get_version(struct snd_sb *chip) 595 { 596 unsigned char dsp_cmd[2]; 597 598 dsp_cmd[0] = 0x08; /* SB_DSP_!something! */ 599 dsp_cmd[1] = 0x03; /* get chip version id? */ 600 command_seq(chip, dsp_cmd, 2); 601 602 return (snd_sbdsp_get_byte(chip)); 603 } 604 605 /* 606 * check if the CSP version is valid 607 */ 608 static int snd_sb_csp_check_version(struct snd_sb_csp * p) 609 { 610 if (p->version < 0x10 || p->version > 0x1f) { 611 snd_printd("%s: Invalid CSP version: 0x%x\n", __func__, p->version); 612 return 1; 613 } 614 return 0; 615 } 616 617 /* 618 * download microcode to CSP (microcode should have one "main" block). 619 */ 620 static int snd_sb_csp_load(struct snd_sb_csp * p, const unsigned char *buf, int size, int load_flags) 621 { 622 int status, i; 623 int err; 624 int result = -EIO; 625 unsigned long flags; 626 627 spin_lock_irqsave(&p->chip->reg_lock, flags); 628 snd_sbdsp_command(p->chip, 0x01); /* CSP download command */ 629 if (snd_sbdsp_get_byte(p->chip)) { 630 snd_printd("%s: Download command failed\n", __func__); 631 goto __fail; 632 } 633 /* Send CSP low byte (size - 1) */ 634 snd_sbdsp_command(p->chip, (unsigned char)(size - 1)); 635 /* Send high byte */ 636 snd_sbdsp_command(p->chip, (unsigned char)((size - 1) >> 8)); 637 /* send microcode sequence */ 638 /* load from kernel space */ 639 while (size--) { 640 if (!snd_sbdsp_command(p->chip, *buf++)) 641 goto __fail; 642 } 643 if (snd_sbdsp_get_byte(p->chip)) 644 goto __fail; 645 646 if (load_flags & SNDRV_SB_CSP_LOAD_INITBLOCK) { 647 i = 0; 648 /* some codecs (FastSpeech) take some time to initialize */ 649 while (1) { 650 snd_sbdsp_command(p->chip, 0x03); 651 status = snd_sbdsp_get_byte(p->chip); 652 if (status == 0x55 || ++i >= 10) 653 break; 654 udelay (10); 655 } 656 if (status != 0x55) { 657 snd_printd("%s: Microcode initialization failed\n", __func__); 658 goto __fail; 659 } 660 } else { 661 /* 662 * Read mixer register SB_DSP4_DMASETUP after loading 'main' code. 663 * Start CSP chip if no 16bit DMA channel is set - some kind 664 * of autorun or perhaps a bugfix? 665 */ 666 spin_lock(&p->chip->mixer_lock); 667 status = snd_sbmixer_read(p->chip, SB_DSP4_DMASETUP); 668 spin_unlock(&p->chip->mixer_lock); 669 if (!(status & (SB_DMASETUP_DMA7 | SB_DMASETUP_DMA6 | SB_DMASETUP_DMA5))) { 670 err = (set_codec_parameter(p->chip, 0xaa, 0x00) || 671 set_codec_parameter(p->chip, 0xff, 0x00)); 672 snd_sbdsp_reset(p->chip); /* really! */ 673 if (err) 674 goto __fail; 675 set_mode_register(p->chip, 0xc0); /* c0 = STOP */ 676 set_mode_register(p->chip, 0x70); /* 70 = RUN */ 677 } 678 } 679 result = 0; 680 681 __fail: 682 spin_unlock_irqrestore(&p->chip->reg_lock, flags); 683 return result; 684 } 685 686 static int snd_sb_csp_load_user(struct snd_sb_csp * p, const unsigned char __user *buf, int size, int load_flags) 687 { 688 int err; 689 unsigned char *kbuf; 690 691 kbuf = memdup_user(buf, size); 692 if (IS_ERR(kbuf)) 693 return PTR_ERR(kbuf); 694 695 err = snd_sb_csp_load(p, kbuf, size, load_flags); 696 697 kfree(kbuf); 698 return err; 699 } 700 701 static int snd_sb_csp_firmware_load(struct snd_sb_csp *p, int index, int flags) 702 { 703 static const char *const names[] = { 704 "sb16/mulaw_main.csp", 705 "sb16/alaw_main.csp", 706 "sb16/ima_adpcm_init.csp", 707 "sb16/ima_adpcm_playback.csp", 708 "sb16/ima_adpcm_capture.csp", 709 }; 710 const struct firmware *program; 711 712 BUILD_BUG_ON(ARRAY_SIZE(names) != CSP_PROGRAM_COUNT); 713 program = p->csp_programs[index]; 714 if (!program) { 715 int err = request_firmware(&program, names[index], 716 p->chip->card->dev); 717 if (err < 0) 718 return err; 719 p->csp_programs[index] = program; 720 } 721 return snd_sb_csp_load(p, program->data, program->size, flags); 722 } 723 724 /* 725 * autoload hardware codec if necessary 726 * return 0 if CSP is loaded and ready to run (p->running != 0) 727 */ 728 static int snd_sb_csp_autoload(struct snd_sb_csp * p, int pcm_sfmt, int play_rec_mode) 729 { 730 unsigned long flags; 731 int err = 0; 732 733 /* if CSP is running or manually loaded then exit */ 734 if (p->running & (SNDRV_SB_CSP_ST_RUNNING | SNDRV_SB_CSP_ST_LOADED)) 735 return -EBUSY; 736 737 /* autoload microcode only if requested hardware codec is not already loaded */ 738 if (((1 << pcm_sfmt) & p->acc_format) && (play_rec_mode & p->mode)) { 739 p->running = SNDRV_SB_CSP_ST_AUTO; 740 } else { 741 switch (pcm_sfmt) { 742 case SNDRV_PCM_FORMAT_MU_LAW: 743 err = snd_sb_csp_firmware_load(p, CSP_PROGRAM_MULAW, 0); 744 p->acc_format = SNDRV_PCM_FMTBIT_MU_LAW; 745 p->mode = SNDRV_SB_CSP_MODE_DSP_READ | SNDRV_SB_CSP_MODE_DSP_WRITE; 746 break; 747 case SNDRV_PCM_FORMAT_A_LAW: 748 err = snd_sb_csp_firmware_load(p, CSP_PROGRAM_ALAW, 0); 749 p->acc_format = SNDRV_PCM_FMTBIT_A_LAW; 750 p->mode = SNDRV_SB_CSP_MODE_DSP_READ | SNDRV_SB_CSP_MODE_DSP_WRITE; 751 break; 752 case SNDRV_PCM_FORMAT_IMA_ADPCM: 753 err = snd_sb_csp_firmware_load(p, CSP_PROGRAM_ADPCM_INIT, 754 SNDRV_SB_CSP_LOAD_INITBLOCK); 755 if (err) 756 break; 757 if (play_rec_mode == SNDRV_SB_CSP_MODE_DSP_WRITE) { 758 err = snd_sb_csp_firmware_load 759 (p, CSP_PROGRAM_ADPCM_PLAYBACK, 0); 760 p->mode = SNDRV_SB_CSP_MODE_DSP_WRITE; 761 } else { 762 err = snd_sb_csp_firmware_load 763 (p, CSP_PROGRAM_ADPCM_CAPTURE, 0); 764 p->mode = SNDRV_SB_CSP_MODE_DSP_READ; 765 } 766 p->acc_format = SNDRV_PCM_FMTBIT_IMA_ADPCM; 767 break; 768 default: 769 /* Decouple CSP from IRQ and DMAREQ lines */ 770 if (p->running & SNDRV_SB_CSP_ST_AUTO) { 771 spin_lock_irqsave(&p->chip->reg_lock, flags); 772 set_mode_register(p->chip, 0xfc); 773 set_mode_register(p->chip, 0x00); 774 spin_unlock_irqrestore(&p->chip->reg_lock, flags); 775 p->running = 0; /* clear autoloaded flag */ 776 } 777 return -EINVAL; 778 } 779 if (err) { 780 p->acc_format = 0; 781 p->acc_channels = p->acc_width = p->acc_rates = 0; 782 783 p->running = 0; /* clear autoloaded flag */ 784 p->mode = 0; 785 return (err); 786 } else { 787 p->running = SNDRV_SB_CSP_ST_AUTO; /* set autoloaded flag */ 788 p->acc_width = SNDRV_SB_CSP_SAMPLE_16BIT; /* only 16 bit data */ 789 p->acc_channels = SNDRV_SB_CSP_MONO | SNDRV_SB_CSP_STEREO; 790 p->acc_rates = SNDRV_SB_CSP_RATE_ALL; /* HW codecs accept all rates */ 791 } 792 793 } 794 return (p->running & SNDRV_SB_CSP_ST_AUTO) ? 0 : -ENXIO; 795 } 796 797 /* 798 * start CSP 799 */ 800 static int snd_sb_csp_start(struct snd_sb_csp * p, int sample_width, int channels) 801 { 802 unsigned char s_type; /* sample type */ 803 unsigned char mixL, mixR; 804 int result = -EIO; 805 unsigned long flags; 806 807 if (!(p->running & (SNDRV_SB_CSP_ST_LOADED | SNDRV_SB_CSP_ST_AUTO))) { 808 snd_printd("%s: Microcode not loaded\n", __func__); 809 return -ENXIO; 810 } 811 if (p->running & SNDRV_SB_CSP_ST_RUNNING) { 812 snd_printd("%s: CSP already running\n", __func__); 813 return -EBUSY; 814 } 815 if (!(sample_width & p->acc_width)) { 816 snd_printd("%s: Unsupported PCM sample width\n", __func__); 817 return -EINVAL; 818 } 819 if (!(channels & p->acc_channels)) { 820 snd_printd("%s: Invalid number of channels\n", __func__); 821 return -EINVAL; 822 } 823 824 /* Mute PCM volume */ 825 spin_lock_irqsave(&p->chip->mixer_lock, flags); 826 mixL = snd_sbmixer_read(p->chip, SB_DSP4_PCM_DEV); 827 mixR = snd_sbmixer_read(p->chip, SB_DSP4_PCM_DEV + 1); 828 snd_sbmixer_write(p->chip, SB_DSP4_PCM_DEV, mixL & 0x7); 829 snd_sbmixer_write(p->chip, SB_DSP4_PCM_DEV + 1, mixR & 0x7); 830 831 spin_lock(&p->chip->reg_lock); 832 set_mode_register(p->chip, 0xc0); /* c0 = STOP */ 833 set_mode_register(p->chip, 0x70); /* 70 = RUN */ 834 835 s_type = 0x00; 836 if (channels == SNDRV_SB_CSP_MONO) 837 s_type = 0x11; /* 000n 000n (n = 1 if mono) */ 838 if (sample_width == SNDRV_SB_CSP_SAMPLE_8BIT) 839 s_type |= 0x22; /* 00dX 00dX (d = 1 if 8 bit samples) */ 840 841 if (set_codec_parameter(p->chip, 0x81, s_type)) { 842 snd_printd("%s: Set sample type command failed\n", __func__); 843 goto __fail; 844 } 845 if (set_codec_parameter(p->chip, 0x80, 0x00)) { 846 snd_printd("%s: Codec start command failed\n", __func__); 847 goto __fail; 848 } 849 p->run_width = sample_width; 850 p->run_channels = channels; 851 852 p->running |= SNDRV_SB_CSP_ST_RUNNING; 853 854 if (p->mode & SNDRV_SB_CSP_MODE_QSOUND) { 855 set_codec_parameter(p->chip, 0xe0, 0x01); 856 /* enable QSound decoder */ 857 set_codec_parameter(p->chip, 0x00, 0xff); 858 set_codec_parameter(p->chip, 0x01, 0xff); 859 p->running |= SNDRV_SB_CSP_ST_QSOUND; 860 /* set QSound startup value */ 861 snd_sb_csp_qsound_transfer(p); 862 } 863 result = 0; 864 865 __fail: 866 spin_unlock(&p->chip->reg_lock); 867 868 /* restore PCM volume */ 869 snd_sbmixer_write(p->chip, SB_DSP4_PCM_DEV, mixL); 870 snd_sbmixer_write(p->chip, SB_DSP4_PCM_DEV + 1, mixR); 871 spin_unlock_irqrestore(&p->chip->mixer_lock, flags); 872 873 return result; 874 } 875 876 /* 877 * stop CSP 878 */ 879 static int snd_sb_csp_stop(struct snd_sb_csp * p) 880 { 881 int result; 882 unsigned char mixL, mixR; 883 unsigned long flags; 884 885 if (!(p->running & SNDRV_SB_CSP_ST_RUNNING)) 886 return 0; 887 888 /* Mute PCM volume */ 889 spin_lock_irqsave(&p->chip->mixer_lock, flags); 890 mixL = snd_sbmixer_read(p->chip, SB_DSP4_PCM_DEV); 891 mixR = snd_sbmixer_read(p->chip, SB_DSP4_PCM_DEV + 1); 892 snd_sbmixer_write(p->chip, SB_DSP4_PCM_DEV, mixL & 0x7); 893 snd_sbmixer_write(p->chip, SB_DSP4_PCM_DEV + 1, mixR & 0x7); 894 895 spin_lock(&p->chip->reg_lock); 896 if (p->running & SNDRV_SB_CSP_ST_QSOUND) { 897 set_codec_parameter(p->chip, 0xe0, 0x01); 898 /* disable QSound decoder */ 899 set_codec_parameter(p->chip, 0x00, 0x00); 900 set_codec_parameter(p->chip, 0x01, 0x00); 901 902 p->running &= ~SNDRV_SB_CSP_ST_QSOUND; 903 } 904 result = set_mode_register(p->chip, 0xc0); /* c0 = STOP */ 905 spin_unlock(&p->chip->reg_lock); 906 907 /* restore PCM volume */ 908 snd_sbmixer_write(p->chip, SB_DSP4_PCM_DEV, mixL); 909 snd_sbmixer_write(p->chip, SB_DSP4_PCM_DEV + 1, mixR); 910 spin_unlock_irqrestore(&p->chip->mixer_lock, flags); 911 912 if (!(result)) 913 p->running &= ~(SNDRV_SB_CSP_ST_PAUSED | SNDRV_SB_CSP_ST_RUNNING); 914 return result; 915 } 916 917 /* 918 * pause CSP codec and hold DMA transfer 919 */ 920 static int snd_sb_csp_pause(struct snd_sb_csp * p) 921 { 922 int result; 923 unsigned long flags; 924 925 if (!(p->running & SNDRV_SB_CSP_ST_RUNNING)) 926 return -EBUSY; 927 928 spin_lock_irqsave(&p->chip->reg_lock, flags); 929 result = set_codec_parameter(p->chip, 0x80, 0xff); 930 spin_unlock_irqrestore(&p->chip->reg_lock, flags); 931 if (!(result)) 932 p->running |= SNDRV_SB_CSP_ST_PAUSED; 933 934 return result; 935 } 936 937 /* 938 * restart CSP codec and resume DMA transfer 939 */ 940 static int snd_sb_csp_restart(struct snd_sb_csp * p) 941 { 942 int result; 943 unsigned long flags; 944 945 if (!(p->running & SNDRV_SB_CSP_ST_PAUSED)) 946 return -EBUSY; 947 948 spin_lock_irqsave(&p->chip->reg_lock, flags); 949 result = set_codec_parameter(p->chip, 0x80, 0x00); 950 spin_unlock_irqrestore(&p->chip->reg_lock, flags); 951 if (!(result)) 952 p->running &= ~SNDRV_SB_CSP_ST_PAUSED; 953 954 return result; 955 } 956 957 /* ------------------------------ */ 958 959 /* 960 * QSound mixer control for PCM 961 */ 962 963 #define snd_sb_qsound_switch_info snd_ctl_boolean_mono_info 964 965 static int snd_sb_qsound_switch_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) 966 { 967 struct snd_sb_csp *p = snd_kcontrol_chip(kcontrol); 968 969 ucontrol->value.integer.value[0] = p->q_enabled ? 1 : 0; 970 return 0; 971 } 972 973 static int snd_sb_qsound_switch_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) 974 { 975 struct snd_sb_csp *p = snd_kcontrol_chip(kcontrol); 976 unsigned long flags; 977 int change; 978 unsigned char nval; 979 980 nval = ucontrol->value.integer.value[0] & 0x01; 981 spin_lock_irqsave(&p->q_lock, flags); 982 change = p->q_enabled != nval; 983 p->q_enabled = nval; 984 spin_unlock_irqrestore(&p->q_lock, flags); 985 return change; 986 } 987 988 static int snd_sb_qsound_space_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) 989 { 990 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 991 uinfo->count = 2; 992 uinfo->value.integer.min = 0; 993 uinfo->value.integer.max = SNDRV_SB_CSP_QSOUND_MAX_RIGHT; 994 return 0; 995 } 996 997 static int snd_sb_qsound_space_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) 998 { 999 struct snd_sb_csp *p = snd_kcontrol_chip(kcontrol); 1000 unsigned long flags; 1001 1002 spin_lock_irqsave(&p->q_lock, flags); 1003 ucontrol->value.integer.value[0] = p->qpos_left; 1004 ucontrol->value.integer.value[1] = p->qpos_right; 1005 spin_unlock_irqrestore(&p->q_lock, flags); 1006 return 0; 1007 } 1008 1009 static int snd_sb_qsound_space_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) 1010 { 1011 struct snd_sb_csp *p = snd_kcontrol_chip(kcontrol); 1012 unsigned long flags; 1013 int change; 1014 unsigned char nval1, nval2; 1015 1016 nval1 = ucontrol->value.integer.value[0]; 1017 if (nval1 > SNDRV_SB_CSP_QSOUND_MAX_RIGHT) 1018 nval1 = SNDRV_SB_CSP_QSOUND_MAX_RIGHT; 1019 nval2 = ucontrol->value.integer.value[1]; 1020 if (nval2 > SNDRV_SB_CSP_QSOUND_MAX_RIGHT) 1021 nval2 = SNDRV_SB_CSP_QSOUND_MAX_RIGHT; 1022 spin_lock_irqsave(&p->q_lock, flags); 1023 change = p->qpos_left != nval1 || p->qpos_right != nval2; 1024 p->qpos_left = nval1; 1025 p->qpos_right = nval2; 1026 p->qpos_changed = change; 1027 spin_unlock_irqrestore(&p->q_lock, flags); 1028 return change; 1029 } 1030 1031 static struct snd_kcontrol_new snd_sb_qsound_switch = { 1032 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 1033 .name = "3D Control - Switch", 1034 .info = snd_sb_qsound_switch_info, 1035 .get = snd_sb_qsound_switch_get, 1036 .put = snd_sb_qsound_switch_put 1037 }; 1038 1039 static struct snd_kcontrol_new snd_sb_qsound_space = { 1040 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 1041 .name = "3D Control - Space", 1042 .info = snd_sb_qsound_space_info, 1043 .get = snd_sb_qsound_space_get, 1044 .put = snd_sb_qsound_space_put 1045 }; 1046 1047 static int snd_sb_qsound_build(struct snd_sb_csp * p) 1048 { 1049 struct snd_card *card; 1050 int err; 1051 1052 if (snd_BUG_ON(!p)) 1053 return -EINVAL; 1054 1055 card = p->chip->card; 1056 p->qpos_left = p->qpos_right = SNDRV_SB_CSP_QSOUND_MAX_RIGHT / 2; 1057 p->qpos_changed = 0; 1058 1059 spin_lock_init(&p->q_lock); 1060 1061 if ((err = snd_ctl_add(card, p->qsound_switch = snd_ctl_new1(&snd_sb_qsound_switch, p))) < 0) 1062 goto __error; 1063 if ((err = snd_ctl_add(card, p->qsound_space = snd_ctl_new1(&snd_sb_qsound_space, p))) < 0) 1064 goto __error; 1065 1066 return 0; 1067 1068 __error: 1069 snd_sb_qsound_destroy(p); 1070 return err; 1071 } 1072 1073 static void snd_sb_qsound_destroy(struct snd_sb_csp * p) 1074 { 1075 struct snd_card *card; 1076 unsigned long flags; 1077 1078 if (snd_BUG_ON(!p)) 1079 return; 1080 1081 card = p->chip->card; 1082 1083 down_write(&card->controls_rwsem); 1084 if (p->qsound_switch) 1085 snd_ctl_remove(card, p->qsound_switch); 1086 if (p->qsound_space) 1087 snd_ctl_remove(card, p->qsound_space); 1088 up_write(&card->controls_rwsem); 1089 1090 /* cancel pending transfer of QSound parameters */ 1091 spin_lock_irqsave (&p->q_lock, flags); 1092 p->qpos_changed = 0; 1093 spin_unlock_irqrestore (&p->q_lock, flags); 1094 } 1095 1096 /* 1097 * Transfer qsound parameters to CSP, 1098 * function should be called from interrupt routine 1099 */ 1100 static int snd_sb_csp_qsound_transfer(struct snd_sb_csp * p) 1101 { 1102 int err = -ENXIO; 1103 1104 spin_lock(&p->q_lock); 1105 if (p->running & SNDRV_SB_CSP_ST_QSOUND) { 1106 set_codec_parameter(p->chip, 0xe0, 0x01); 1107 /* left channel */ 1108 set_codec_parameter(p->chip, 0x00, p->qpos_left); 1109 set_codec_parameter(p->chip, 0x02, 0x00); 1110 /* right channel */ 1111 set_codec_parameter(p->chip, 0x00, p->qpos_right); 1112 set_codec_parameter(p->chip, 0x03, 0x00); 1113 err = 0; 1114 } 1115 p->qpos_changed = 0; 1116 spin_unlock(&p->q_lock); 1117 return err; 1118 } 1119 1120 /* ------------------------------ */ 1121 1122 /* 1123 * proc interface 1124 */ 1125 static int init_proc_entry(struct snd_sb_csp * p, int device) 1126 { 1127 char name[16]; 1128 struct snd_info_entry *entry; 1129 sprintf(name, "cspD%d", device); 1130 if (! snd_card_proc_new(p->chip->card, name, &entry)) 1131 snd_info_set_text_ops(entry, p, info_read); 1132 return 0; 1133 } 1134 1135 static void info_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer) 1136 { 1137 struct snd_sb_csp *p = entry->private_data; 1138 1139 snd_iprintf(buffer, "Creative Signal Processor [v%d.%d]\n", (p->version >> 4), (p->version & 0x0f)); 1140 snd_iprintf(buffer, "State: %cx%c%c%c\n", ((p->running & SNDRV_SB_CSP_ST_QSOUND) ? 'Q' : '-'), 1141 ((p->running & SNDRV_SB_CSP_ST_PAUSED) ? 'P' : '-'), 1142 ((p->running & SNDRV_SB_CSP_ST_RUNNING) ? 'R' : '-'), 1143 ((p->running & SNDRV_SB_CSP_ST_LOADED) ? 'L' : '-')); 1144 if (p->running & SNDRV_SB_CSP_ST_LOADED) { 1145 snd_iprintf(buffer, "Codec: %s [func #%d]\n", p->codec_name, p->func_nr); 1146 snd_iprintf(buffer, "Sample rates: "); 1147 if (p->acc_rates == SNDRV_SB_CSP_RATE_ALL) { 1148 snd_iprintf(buffer, "All\n"); 1149 } else { 1150 snd_iprintf(buffer, "%s%s%s%s\n", 1151 ((p->acc_rates & SNDRV_SB_CSP_RATE_8000) ? "8000Hz " : ""), 1152 ((p->acc_rates & SNDRV_SB_CSP_RATE_11025) ? "11025Hz " : ""), 1153 ((p->acc_rates & SNDRV_SB_CSP_RATE_22050) ? "22050Hz " : ""), 1154 ((p->acc_rates & SNDRV_SB_CSP_RATE_44100) ? "44100Hz" : "")); 1155 } 1156 if (p->mode == SNDRV_SB_CSP_MODE_QSOUND) { 1157 snd_iprintf(buffer, "QSound decoder %sabled\n", 1158 p->q_enabled ? "en" : "dis"); 1159 } else { 1160 snd_iprintf(buffer, "PCM format ID: 0x%x (%s/%s) [%s/%s] [%s/%s]\n", 1161 p->acc_format, 1162 ((p->acc_width & SNDRV_SB_CSP_SAMPLE_16BIT) ? "16bit" : "-"), 1163 ((p->acc_width & SNDRV_SB_CSP_SAMPLE_8BIT) ? "8bit" : "-"), 1164 ((p->acc_channels & SNDRV_SB_CSP_MONO) ? "mono" : "-"), 1165 ((p->acc_channels & SNDRV_SB_CSP_STEREO) ? "stereo" : "-"), 1166 ((p->mode & SNDRV_SB_CSP_MODE_DSP_WRITE) ? "playback" : "-"), 1167 ((p->mode & SNDRV_SB_CSP_MODE_DSP_READ) ? "capture" : "-")); 1168 } 1169 } 1170 if (p->running & SNDRV_SB_CSP_ST_AUTO) { 1171 snd_iprintf(buffer, "Autoloaded Mu-Law, A-Law or Ima-ADPCM hardware codec\n"); 1172 } 1173 if (p->running & SNDRV_SB_CSP_ST_RUNNING) { 1174 snd_iprintf(buffer, "Processing %dbit %s PCM samples\n", 1175 ((p->run_width & SNDRV_SB_CSP_SAMPLE_16BIT) ? 16 : 8), 1176 ((p->run_channels & SNDRV_SB_CSP_MONO) ? "mono" : "stereo")); 1177 } 1178 if (p->running & SNDRV_SB_CSP_ST_QSOUND) { 1179 snd_iprintf(buffer, "Qsound position: left = 0x%x, right = 0x%x\n", 1180 p->qpos_left, p->qpos_right); 1181 } 1182 } 1183 1184 /* */ 1185 1186 EXPORT_SYMBOL(snd_sb_csp_new); 1187 1188 /* 1189 * INIT part 1190 */ 1191 1192 static int __init alsa_sb_csp_init(void) 1193 { 1194 return 0; 1195 } 1196 1197 static void __exit alsa_sb_csp_exit(void) 1198 { 1199 } 1200 1201 module_init(alsa_sb_csp_init) 1202 module_exit(alsa_sb_csp_exit) 1203