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