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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
[linux-btrfs-devel.git] / sound / isa / sb / sb16_csp.c
blobbdc8dde4e4a219ab09736a1f9455207f63dfa3c1
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 if (snd_BUG_ON(!p))
202 return -EINVAL;
203
204 if (snd_sb_csp_check_version(p))
205 return -ENODEV;
206
207 switch (cmd) {
208 /* get information */
209 case SNDRV_SB_CSP_IOCTL_INFO:
210 *info.codec_name = *p->codec_name;
211 info.func_nr = p->func_nr;
212 info.acc_format = p->acc_format;
213 info.acc_channels = p->acc_channels;
214 info.acc_width = p->acc_width;
215 info.acc_rates = p->acc_rates;
216 info.csp_mode = p->mode;
217 info.run_channels = p->run_channels;
218 info.run_width = p->run_width;
219 info.version = p->version;
220 info.state = p->running;
221 if (copy_to_user((void __user *)arg, &info, sizeof(info)))
222 err = -EFAULT;
223 else
224 err = 0;
225 break;
226
227 /* load CSP microcode */
228 case SNDRV_SB_CSP_IOCTL_LOAD_CODE:
229 err = (p->running & SNDRV_SB_CSP_ST_RUNNING ?
230 -EBUSY : snd_sb_csp_riff_load(p, (struct snd_sb_csp_microcode __user *) arg));
231 break;
232 case SNDRV_SB_CSP_IOCTL_UNLOAD_CODE:
233 err = (p->running & SNDRV_SB_CSP_ST_RUNNING ?
234 -EBUSY : snd_sb_csp_unload(p));
235 break;
236
237 /* change CSP running state */
238 case SNDRV_SB_CSP_IOCTL_START:
239 if (copy_from_user(&start_info, (void __user *) arg, sizeof(start_info)))
240 err = -EFAULT;
241 else
242 err = snd_sb_csp_start(p, start_info.sample_width, start_info.channels);
243 break;
244 case SNDRV_SB_CSP_IOCTL_STOP:
245 err = snd_sb_csp_stop(p);
246 break;
247 case SNDRV_SB_CSP_IOCTL_PAUSE:
248 err = snd_sb_csp_pause(p);
249 break;
250 case SNDRV_SB_CSP_IOCTL_RESTART:
251 err = snd_sb_csp_restart(p);
252 break;
253 default:
254 err = -ENOTTY;
255 break;
256 }
257
258 return err;
259 }
260
261 /*
262 * close the device
263 */
264 static int snd_sb_csp_release(struct snd_hwdep * hw, struct file *file)
265 {
266 struct snd_sb_csp *p = hw->private_data;
267 return (snd_sb_csp_unuse(p));
268 }
269
270 /* ------------------------------ */
271
272 /*
273 * acquire device
274 */
275 static int snd_sb_csp_use(struct snd_sb_csp * p)
276 {
277 mutex_lock(&p->access_mutex);
278 if (p->used) {
279 mutex_unlock(&p->access_mutex);
280 return -EAGAIN;
281 }
282 p->used++;
283 mutex_unlock(&p->access_mutex);
284
285 return 0;
286
287 }
288
289 /*
290 * release device
291 */
292 static int snd_sb_csp_unuse(struct snd_sb_csp * p)
293 {
294 mutex_lock(&p->access_mutex);
295 p->used--;
296 mutex_unlock(&p->access_mutex);
297
298 return 0;
299 }
300
301 /*
302 * load microcode via ioctl:
303 * code is user-space pointer
304 */
305 static int snd_sb_csp_riff_load(struct snd_sb_csp * p,
306 struct snd_sb_csp_microcode __user * mcode)
307 {
308 struct snd_sb_csp_mc_header info;
309
310 unsigned char __user *data_ptr;
311 unsigned char __user *data_end;
312 unsigned short func_nr = 0;
313
314 struct riff_header file_h, item_h, code_h;
315 __u32 item_type;
316 struct desc_header funcdesc_h;
317
318 unsigned long flags;
319 int err;
320
321 if (copy_from_user(&info, mcode, sizeof(info)))
322 return -EFAULT;
323 data_ptr = mcode->data;
324
325 if (copy_from_user(&file_h, data_ptr, sizeof(file_h)))
326 return -EFAULT;
327 if ((file_h.name != RIFF_HEADER) ||
328 (le32_to_cpu(file_h.len) >= SNDRV_SB_CSP_MAX_MICROCODE_FILE_SIZE - sizeof(file_h))) {
329 snd_printd("%s: Invalid RIFF header\n", __func__);
330 return -EINVAL;
331 }
332 data_ptr += sizeof(file_h);
333 data_end = data_ptr + le32_to_cpu(file_h.len);
334
335 if (copy_from_user(&item_type, data_ptr, sizeof(item_type)))
336 return -EFAULT;
337 if (item_type != CSP__HEADER) {
338 snd_printd("%s: Invalid RIFF file type\n", __func__);
339 return -EINVAL;
340 }
341 data_ptr += sizeof (item_type);
342
343 for (; data_ptr < data_end; data_ptr += le32_to_cpu(item_h.len)) {
344 if (copy_from_user(&item_h, data_ptr, sizeof(item_h)))
345 return -EFAULT;
346 data_ptr += sizeof(item_h);
347 if (item_h.name != LIST_HEADER)
348 continue;
349
350 if (copy_from_user(&item_type, data_ptr, sizeof(item_type)))
351 return -EFAULT;
352 switch (item_type) {
353 case FUNC_HEADER:
354 if (copy_from_user(&funcdesc_h, data_ptr + sizeof(item_type), sizeof(funcdesc_h)))
355 return -EFAULT;
356 func_nr = le16_to_cpu(funcdesc_h.func_nr);
357 break;
358 case CODE_HEADER:
359 if (func_nr != info.func_req)
360 break; /* not required function, try next */
361 data_ptr += sizeof(item_type);
362
363 /* destroy QSound mixer element */
364 if (p->mode == SNDRV_SB_CSP_MODE_QSOUND) {
365 snd_sb_qsound_destroy(p);
366 }
367 /* Clear all flags */
368 p->running = 0;
369 p->mode = 0;
370
371 /* load microcode blocks */
372 for (;;) {
373 if (data_ptr >= data_end)
374 return -EINVAL;
375 if (copy_from_user(&code_h, data_ptr, sizeof(code_h)))
376 return -EFAULT;
377
378 /* init microcode blocks */
379 if (code_h.name != INIT_HEADER)
380 break;
381 data_ptr += sizeof(code_h);
382 err = snd_sb_csp_load_user(p, data_ptr, le32_to_cpu(code_h.len),
383 SNDRV_SB_CSP_LOAD_INITBLOCK);
384 if (err)
385 return err;
386 data_ptr += le32_to_cpu(code_h.len);
387 }
388 /* main microcode block */
389 if (copy_from_user(&code_h, data_ptr, sizeof(code_h)))
390 return -EFAULT;
391
392 if (code_h.name != MAIN_HEADER) {
393 snd_printd("%s: Missing 'main' microcode\n", __func__);
394 return -EINVAL;
395 }
396 data_ptr += sizeof(code_h);
397 err = snd_sb_csp_load_user(p, data_ptr,
398 le32_to_cpu(code_h.len), 0);
399 if (err)
400 return err;
401
402 /* fill in codec header */
403 strlcpy(p->codec_name, info.codec_name, sizeof(p->codec_name));
404 p->func_nr = func_nr;
405 p->mode = le16_to_cpu(funcdesc_h.flags_play_rec);
406 switch (le16_to_cpu(funcdesc_h.VOC_type)) {
407 case 0x0001: /* QSound decoder */
408 if (le16_to_cpu(funcdesc_h.flags_play_rec) == SNDRV_SB_CSP_MODE_DSP_WRITE) {
409 if (snd_sb_qsound_build(p) == 0)
410 /* set QSound flag and clear all other mode flags */
411 p->mode = SNDRV_SB_CSP_MODE_QSOUND;
412 }
413 p->acc_format = 0;
414 break;
415 case 0x0006: /* A Law codec */
416 p->acc_format = SNDRV_PCM_FMTBIT_A_LAW;
417 break;
418 case 0x0007: /* Mu Law codec */
419 p->acc_format = SNDRV_PCM_FMTBIT_MU_LAW;
420 break;
421 case 0x0011: /* what Creative thinks is IMA ADPCM codec */
422 case 0x0200: /* Creative ADPCM codec */
423 p->acc_format = SNDRV_PCM_FMTBIT_IMA_ADPCM;
424 break;
425 case 201: /* Text 2 Speech decoder */
426 /* TODO: Text2Speech handling routines */
427 p->acc_format = 0;
428 break;
429 case 0x0202: /* Fast Speech 8 codec */
430 case 0x0203: /* Fast Speech 10 codec */
431 p->acc_format = SNDRV_PCM_FMTBIT_SPECIAL;
432 break;
433 default: /* other codecs are unsupported */
434 p->acc_format = p->acc_width = p->acc_rates = 0;
435 p->mode = 0;
436 snd_printd("%s: Unsupported CSP codec type: 0x%04x\n",
437 __func__,
438 le16_to_cpu(funcdesc_h.VOC_type));
439 return -EINVAL;
440 }
441 p->acc_channels = le16_to_cpu(funcdesc_h.flags_stereo_mono);
442 p->acc_width = le16_to_cpu(funcdesc_h.flags_16bit_8bit);
443 p->acc_rates = le16_to_cpu(funcdesc_h.flags_rates);
444
445 /* Decouple CSP from IRQ and DMAREQ lines */
446 spin_lock_irqsave(&p->chip->reg_lock, flags);
447 set_mode_register(p->chip, 0xfc);
448 set_mode_register(p->chip, 0x00);
449 spin_unlock_irqrestore(&p->chip->reg_lock, flags);
450
451 /* finished loading successfully */
452 p->running = SNDRV_SB_CSP_ST_LOADED; /* set LOADED flag */
453 return 0;
454 }
455 }
456 snd_printd("%s: Function #%d not found\n", __func__, info.func_req);
457 return -EINVAL;
458 }
459
460 /*
461 * unload CSP microcode
462 */
463 static int snd_sb_csp_unload(struct snd_sb_csp * p)
464 {
465 if (p->running & SNDRV_SB_CSP_ST_RUNNING)
466 return -EBUSY;
467 if (!(p->running & SNDRV_SB_CSP_ST_LOADED))
468 return -ENXIO;
469
470 /* clear supported formats */
471 p->acc_format = 0;
472 p->acc_channels = p->acc_width = p->acc_rates = 0;
473 /* destroy QSound mixer element */
474 if (p->mode == SNDRV_SB_CSP_MODE_QSOUND) {
475 snd_sb_qsound_destroy(p);
476 }
477 /* clear all flags */
478 p->running = 0;
479 p->mode = 0;
480 return 0;
481 }
482
483 /*
484 * send command sequence to DSP
485 */
486 static inline int command_seq(struct snd_sb *chip, const unsigned char *seq, int size)
487 {
488 int i;
489 for (i = 0; i < size; i++) {
490 if (!snd_sbdsp_command(chip, seq[i]))
491 return -EIO;
492 }
493 return 0;
494 }
495
496 /*
497 * set CSP codec parameter
498 */
499 static int set_codec_parameter(struct snd_sb *chip, unsigned char par, unsigned char val)
500 {
501 unsigned char dsp_cmd[3];
502
503 dsp_cmd[0] = 0x05; /* CSP set codec parameter */
504 dsp_cmd[1] = val; /* Parameter value */
505 dsp_cmd[2] = par; /* Parameter */
506 command_seq(chip, dsp_cmd, 3);
507 snd_sbdsp_command(chip, 0x03); /* DSP read? */
508 if (snd_sbdsp_get_byte(chip) != par)
509 return -EIO;
510 return 0;
511 }
512
513 /*
514 * set CSP register
515 */
516 static int set_register(struct snd_sb *chip, unsigned char reg, unsigned char val)
517 {
518 unsigned char dsp_cmd[3];
519
520 dsp_cmd[0] = 0x0e; /* CSP set register */
521 dsp_cmd[1] = reg; /* CSP Register */
522 dsp_cmd[2] = val; /* value */
523 return command_seq(chip, dsp_cmd, 3);
524 }
525
526 /*
527 * read CSP register
528 * return < 0 -> error
529 */
530 static int read_register(struct snd_sb *chip, unsigned char reg)
531 {
532 unsigned char dsp_cmd[2];
533
534 dsp_cmd[0] = 0x0f; /* CSP read register */
535 dsp_cmd[1] = reg; /* CSP Register */
536 command_seq(chip, dsp_cmd, 2);
537 return snd_sbdsp_get_byte(chip); /* Read DSP value */
538 }
539
540 /*
541 * set CSP mode register
542 */
543 static int set_mode_register(struct snd_sb *chip, unsigned char mode)
544 {
545 unsigned char dsp_cmd[2];
546
547 dsp_cmd[0] = 0x04; /* CSP set mode register */
548 dsp_cmd[1] = mode; /* mode */
549 return command_seq(chip, dsp_cmd, 2);
550 }
551
552 /*
553 * Detect CSP
554 * return 0 if CSP exists.
555 */
556 static int csp_detect(struct snd_sb *chip, int *version)
557 {
558 unsigned char csp_test1, csp_test2;
559 unsigned long flags;
560 int result = -ENODEV;
561
562 spin_lock_irqsave(&chip->reg_lock, flags);
563
564 set_codec_parameter(chip, 0x00, 0x00);
565 set_mode_register(chip, 0xfc); /* 0xfc = ?? */
566
567 csp_test1 = read_register(chip, 0x83);
568 set_register(chip, 0x83, ~csp_test1);
569 csp_test2 = read_register(chip, 0x83);
570 if (csp_test2 != (csp_test1 ^ 0xff))
571 goto __fail;
572
573 set_register(chip, 0x83, csp_test1);
574 csp_test2 = read_register(chip, 0x83);
575 if (csp_test2 != csp_test1)
576 goto __fail;
577
578 set_mode_register(chip, 0x00); /* 0x00 = ? */
579
580 *version = get_version(chip);
581 snd_sbdsp_reset(chip); /* reset DSP after getversion! */
582 if (*version >= 0x10 && *version <= 0x1f)
583 result = 0; /* valid version id */
584
585 __fail:
586 spin_unlock_irqrestore(&chip->reg_lock, flags);
587 return result;
588 }
589
590 /*
591 * get CSP version number
592 */
593 static int get_version(struct snd_sb *chip)
594 {
595 unsigned char dsp_cmd[2];
596
597 dsp_cmd[0] = 0x08; /* SB_DSP_!something! */
598 dsp_cmd[1] = 0x03; /* get chip version id? */
599 command_seq(chip, dsp_cmd, 2);
600
601 return (snd_sbdsp_get_byte(chip));
602 }
603
604 /*
605 * check if the CSP version is valid
606 */
607 static int snd_sb_csp_check_version(struct snd_sb_csp * p)
608 {
609 if (p->version < 0x10 || p->version > 0x1f) {
610 snd_printd("%s: Invalid CSP version: 0x%x\n", __func__, p->version);
611 return 1;
612 }
613 return 0;
614 }
615
616 /*
617 * download microcode to CSP (microcode should have one "main" block).
618 */
619 static int snd_sb_csp_load(struct snd_sb_csp * p, const unsigned char *buf, int size, int load_flags)
620 {
621 int status, i;
622 int err;
623 int result = -EIO;
624 unsigned long flags;
625
626 spin_lock_irqsave(&p->chip->reg_lock, flags);
627 snd_sbdsp_command(p->chip, 0x01); /* CSP download command */
628 if (snd_sbdsp_get_byte(p->chip)) {
629 snd_printd("%s: Download command failed\n", __func__);
630 goto __fail;
631 }
632 /* Send CSP low byte (size - 1) */
633 snd_sbdsp_command(p->chip, (unsigned char)(size - 1));
634 /* Send high byte */
635 snd_sbdsp_command(p->chip, (unsigned char)((size - 1) >> 8));
636 /* send microcode sequence */
637 /* load from kernel space */
638 while (size--) {
639 if (!snd_sbdsp_command(p->chip, *buf++))
640 goto __fail;
641 }
642 if (snd_sbdsp_get_byte(p->chip))
643 goto __fail;
644
645 if (load_flags & SNDRV_SB_CSP_LOAD_INITBLOCK) {
646 i = 0;
647 /* some codecs (FastSpeech) take some time to initialize */
648 while (1) {
649 snd_sbdsp_command(p->chip, 0x03);
650 status = snd_sbdsp_get_byte(p->chip);
651 if (status == 0x55 || ++i >= 10)
652 break;
653 udelay (10);
654 }
655 if (status != 0x55) {
656 snd_printd("%s: Microcode initialization failed\n", __func__);
657 goto __fail;
658 }
659 } else {
660 /*
661 * Read mixer register SB_DSP4_DMASETUP after loading 'main' code.
662 * Start CSP chip if no 16bit DMA channel is set - some kind
663 * of autorun or perhaps a bugfix?
664 */
665 spin_lock(&p->chip->mixer_lock);
666 status = snd_sbmixer_read(p->chip, SB_DSP4_DMASETUP);
667 spin_unlock(&p->chip->mixer_lock);
668 if (!(status & (SB_DMASETUP_DMA7 | SB_DMASETUP_DMA6 | SB_DMASETUP_DMA5))) {
669 err = (set_codec_parameter(p->chip, 0xaa, 0x00) ||
670 set_codec_parameter(p->chip, 0xff, 0x00));
671 snd_sbdsp_reset(p->chip); /* really! */
672 if (err)
673 goto __fail;
674 set_mode_register(p->chip, 0xc0); /* c0 = STOP */
675 set_mode_register(p->chip, 0x70); /* 70 = RUN */
676 }
677 }
678 result = 0;
679
680 __fail:
681 spin_unlock_irqrestore(&p->chip->reg_lock, flags);
682 return result;
683 }
684
685 static int snd_sb_csp_load_user(struct snd_sb_csp * p, const unsigned char __user *buf, int size, int load_flags)
686 {
687 int err;
688 unsigned char *kbuf;
689
690 kbuf = memdup_user(buf, size);
691 if (IS_ERR(kbuf))
692 return PTR_ERR(kbuf);
693
694 err = snd_sb_csp_load(p, kbuf, size, load_flags);
695
696 kfree(kbuf);
697 return err;
698 }
699
700 static int snd_sb_csp_firmware_load(struct snd_sb_csp *p, int index, int flags)
701 {
702 static const char *const names[] = {
703 "sb16/mulaw_main.csp",
704 "sb16/alaw_main.csp",
705 "sb16/ima_adpcm_init.csp",
706 "sb16/ima_adpcm_playback.csp",
707 "sb16/ima_adpcm_capture.csp",
708 };
709 const struct firmware *program;
710
711 BUILD_BUG_ON(ARRAY_SIZE(names) != CSP_PROGRAM_COUNT);
712 program = p->csp_programs[index];
713 if (!program) {
714 int err = request_firmware(&program, names[index],
715 p->chip->card->dev);
716 if (err < 0)
717 return err;
718 p->csp_programs[index] = program;
719 }
720 return snd_sb_csp_load(p, program->data, program->size, flags);
721 }
722
723 /*
724 * autoload hardware codec if necessary
725 * return 0 if CSP is loaded and ready to run (p->running != 0)
726 */
727 static int snd_sb_csp_autoload(struct snd_sb_csp * p, int pcm_sfmt, int play_rec_mode)
728 {
729 unsigned long flags;
730 int err = 0;
731
732 /* if CSP is running or manually loaded then exit */
733 if (p->running & (SNDRV_SB_CSP_ST_RUNNING | SNDRV_SB_CSP_ST_LOADED))
734 return -EBUSY;
735
736 /* autoload microcode only if requested hardware codec is not already loaded */
737 if (((1 << pcm_sfmt) & p->acc_format) && (play_rec_mode & p->mode)) {
738 p->running = SNDRV_SB_CSP_ST_AUTO;
739 } else {
740 switch (pcm_sfmt) {
741 case SNDRV_PCM_FORMAT_MU_LAW:
742 err = snd_sb_csp_firmware_load(p, CSP_PROGRAM_MULAW, 0);
743 p->acc_format = SNDRV_PCM_FMTBIT_MU_LAW;
744 p->mode = SNDRV_SB_CSP_MODE_DSP_READ | SNDRV_SB_CSP_MODE_DSP_WRITE;
745 break;
746 case SNDRV_PCM_FORMAT_A_LAW:
747 err = snd_sb_csp_firmware_load(p, CSP_PROGRAM_ALAW, 0);
748 p->acc_format = SNDRV_PCM_FMTBIT_A_LAW;
749 p->mode = SNDRV_SB_CSP_MODE_DSP_READ | SNDRV_SB_CSP_MODE_DSP_WRITE;
750 break;
751 case SNDRV_PCM_FORMAT_IMA_ADPCM:
752 err = snd_sb_csp_firmware_load(p, CSP_PROGRAM_ADPCM_INIT,
753 SNDRV_SB_CSP_LOAD_INITBLOCK);
754 if (err)
755 break;
756 if (play_rec_mode == SNDRV_SB_CSP_MODE_DSP_WRITE) {
757 err = snd_sb_csp_firmware_load
758 (p, CSP_PROGRAM_ADPCM_PLAYBACK, 0);
759 p->mode = SNDRV_SB_CSP_MODE_DSP_WRITE;
760 } else {
761 err = snd_sb_csp_firmware_load
762 (p, CSP_PROGRAM_ADPCM_CAPTURE, 0);
763 p->mode = SNDRV_SB_CSP_MODE_DSP_READ;
764 }
765 p->acc_format = SNDRV_PCM_FMTBIT_IMA_ADPCM;
766 break;
767 default:
768 /* Decouple CSP from IRQ and DMAREQ lines */
769 if (p->running & SNDRV_SB_CSP_ST_AUTO) {
770 spin_lock_irqsave(&p->chip->reg_lock, flags);
771 set_mode_register(p->chip, 0xfc);
772 set_mode_register(p->chip, 0x00);
773 spin_unlock_irqrestore(&p->chip->reg_lock, flags);
774 p->running = 0; /* clear autoloaded flag */
775 }
776 return -EINVAL;
777 }
778 if (err) {
779 p->acc_format = 0;
780 p->acc_channels = p->acc_width = p->acc_rates = 0;
781
782 p->running = 0; /* clear autoloaded flag */
783 p->mode = 0;
784 return (err);
785 } else {
786 p->running = SNDRV_SB_CSP_ST_AUTO; /* set autoloaded flag */
787 p->acc_width = SNDRV_SB_CSP_SAMPLE_16BIT; /* only 16 bit data */
788 p->acc_channels = SNDRV_SB_CSP_MONO | SNDRV_SB_CSP_STEREO;
789 p->acc_rates = SNDRV_SB_CSP_RATE_ALL; /* HW codecs accept all rates */
790 }
791
792 }
793 return (p->running & SNDRV_SB_CSP_ST_AUTO) ? 0 : -ENXIO;
794 }
795
796 /*
797 * start CSP
798 */
799 static int snd_sb_csp_start(struct snd_sb_csp * p, int sample_width, int channels)
800 {
801 unsigned char s_type; /* sample type */
802 unsigned char mixL, mixR;
803 int result = -EIO;
804 unsigned long flags;
805
806 if (!(p->running & (SNDRV_SB_CSP_ST_LOADED | SNDRV_SB_CSP_ST_AUTO))) {
807 snd_printd("%s: Microcode not loaded\n", __func__);
808 return -ENXIO;
809 }
810 if (p->running & SNDRV_SB_CSP_ST_RUNNING) {
811 snd_printd("%s: CSP already running\n", __func__);
812 return -EBUSY;
813 }
814 if (!(sample_width & p->acc_width)) {
815 snd_printd("%s: Unsupported PCM sample width\n", __func__);
816 return -EINVAL;
817 }
818 if (!(channels & p->acc_channels)) {
819 snd_printd("%s: Invalid number of channels\n", __func__);
820 return -EINVAL;
821 }
822
823 /* Mute PCM volume */
824 spin_lock_irqsave(&p->chip->mixer_lock, flags);
825 mixL = snd_sbmixer_read(p->chip, SB_DSP4_PCM_DEV);
826 mixR = snd_sbmixer_read(p->chip, SB_DSP4_PCM_DEV + 1);
827 snd_sbmixer_write(p->chip, SB_DSP4_PCM_DEV, mixL & 0x7);
828 snd_sbmixer_write(p->chip, SB_DSP4_PCM_DEV + 1, mixR & 0x7);
829
830 spin_lock(&p->chip->reg_lock);
831 set_mode_register(p->chip, 0xc0); /* c0 = STOP */
832 set_mode_register(p->chip, 0x70); /* 70 = RUN */
833
834 s_type = 0x00;
835 if (channels == SNDRV_SB_CSP_MONO)
836 s_type = 0x11; /* 000n 000n (n = 1 if mono) */
837 if (sample_width == SNDRV_SB_CSP_SAMPLE_8BIT)
838 s_type |= 0x22; /* 00dX 00dX (d = 1 if 8 bit samples) */
839
840 if (set_codec_parameter(p->chip, 0x81, s_type)) {
841 snd_printd("%s: Set sample type command failed\n", __func__);
842 goto __fail;
843 }
844 if (set_codec_parameter(p->chip, 0x80, 0x00)) {
845 snd_printd("%s: Codec start command failed\n", __func__);
846 goto __fail;
847 }
848 p->run_width = sample_width;
849 p->run_channels = channels;
850
851 p->running |= SNDRV_SB_CSP_ST_RUNNING;
852
853 if (p->mode & SNDRV_SB_CSP_MODE_QSOUND) {
854 set_codec_parameter(p->chip, 0xe0, 0x01);
855 /* enable QSound decoder */
856 set_codec_parameter(p->chip, 0x00, 0xff);
857 set_codec_parameter(p->chip, 0x01, 0xff);
858 p->running |= SNDRV_SB_CSP_ST_QSOUND;
859 /* set QSound startup value */
860 snd_sb_csp_qsound_transfer(p);
861 }
862 result = 0;
863
864 __fail:
865 spin_unlock(&p->chip->reg_lock);
866
867 /* restore PCM volume */
868 snd_sbmixer_write(p->chip, SB_DSP4_PCM_DEV, mixL);
869 snd_sbmixer_write(p->chip, SB_DSP4_PCM_DEV + 1, mixR);
870 spin_unlock_irqrestore(&p->chip->mixer_lock, flags);
871
872 return result;
873 }
874
875 /*
876 * stop CSP
877 */
878 static int snd_sb_csp_stop(struct snd_sb_csp * p)
879 {
880 int result;
881 unsigned char mixL, mixR;
882 unsigned long flags;
883
884 if (!(p->running & SNDRV_SB_CSP_ST_RUNNING))
885 return 0;
886
887 /* Mute PCM volume */
888 spin_lock_irqsave(&p->chip->mixer_lock, flags);
889 mixL = snd_sbmixer_read(p->chip, SB_DSP4_PCM_DEV);
890 mixR = snd_sbmixer_read(p->chip, SB_DSP4_PCM_DEV + 1);
891 snd_sbmixer_write(p->chip, SB_DSP4_PCM_DEV, mixL & 0x7);
892 snd_sbmixer_write(p->chip, SB_DSP4_PCM_DEV + 1, mixR & 0x7);
893
894 spin_lock(&p->chip->reg_lock);
895 if (p->running & SNDRV_SB_CSP_ST_QSOUND) {
896 set_codec_parameter(p->chip, 0xe0, 0x01);
897 /* disable QSound decoder */
898 set_codec_parameter(p->chip, 0x00, 0x00);
899 set_codec_parameter(p->chip, 0x01, 0x00);
900
901 p->running &= ~SNDRV_SB_CSP_ST_QSOUND;
902 }
903 result = set_mode_register(p->chip, 0xc0); /* c0 = STOP */
904 spin_unlock(&p->chip->reg_lock);
905
906 /* restore PCM volume */
907 snd_sbmixer_write(p->chip, SB_DSP4_PCM_DEV, mixL);
908 snd_sbmixer_write(p->chip, SB_DSP4_PCM_DEV + 1, mixR);
909 spin_unlock_irqrestore(&p->chip->mixer_lock, flags);
910
911 if (!(result))
912 p->running &= ~(SNDRV_SB_CSP_ST_PAUSED | SNDRV_SB_CSP_ST_RUNNING);
913 return result;
914 }
915
916 /*
917 * pause CSP codec and hold DMA transfer
918 */
919 static int snd_sb_csp_pause(struct snd_sb_csp * p)
920 {
921 int result;
922 unsigned long flags;
923
924 if (!(p->running & SNDRV_SB_CSP_ST_RUNNING))
925 return -EBUSY;
926
927 spin_lock_irqsave(&p->chip->reg_lock, flags);
928 result = set_codec_parameter(p->chip, 0x80, 0xff);
929 spin_unlock_irqrestore(&p->chip->reg_lock, flags);
930 if (!(result))
931 p->running |= SNDRV_SB_CSP_ST_PAUSED;
932
933 return result;
934 }
935
936 /*
937 * restart CSP codec and resume DMA transfer
938 */
939 static int snd_sb_csp_restart(struct snd_sb_csp * p)
940 {
941 int result;
942 unsigned long flags;
943
944 if (!(p->running & SNDRV_SB_CSP_ST_PAUSED))
945 return -EBUSY;
946
947 spin_lock_irqsave(&p->chip->reg_lock, flags);
948 result = set_codec_parameter(p->chip, 0x80, 0x00);
949 spin_unlock_irqrestore(&p->chip->reg_lock, flags);
950 if (!(result))
951 p->running &= ~SNDRV_SB_CSP_ST_PAUSED;
952
953 return result;
954 }
955
956 /* ------------------------------ */
957
958 /*
959 * QSound mixer control for PCM
960 */
961
962 #define snd_sb_qsound_switch_info snd_ctl_boolean_mono_info
963
964 static int snd_sb_qsound_switch_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
965 {
966 struct snd_sb_csp *p = snd_kcontrol_chip(kcontrol);
967
968 ucontrol->value.integer.value[0] = p->q_enabled ? 1 : 0;
969 return 0;
970 }
971
972 static int snd_sb_qsound_switch_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
973 {
974 struct snd_sb_csp *p = snd_kcontrol_chip(kcontrol);
975 unsigned long flags;
976 int change;
977 unsigned char nval;
978
979 nval = ucontrol->value.integer.value[0] & 0x01;
980 spin_lock_irqsave(&p->q_lock, flags);
981 change = p->q_enabled != nval;
982 p->q_enabled = nval;
983 spin_unlock_irqrestore(&p->q_lock, flags);
984 return change;
985 }
986
987 static int snd_sb_qsound_space_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
988 {
989 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
990 uinfo->count = 2;
991 uinfo->value.integer.min = 0;
992 uinfo->value.integer.max = SNDRV_SB_CSP_QSOUND_MAX_RIGHT;
993 return 0;
994 }
995
996 static int snd_sb_qsound_space_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
997 {
998 struct snd_sb_csp *p = snd_kcontrol_chip(kcontrol);
999 unsigned long flags;
1000
1001 spin_lock_irqsave(&p->q_lock, flags);
1002 ucontrol->value.integer.value[0] = p->qpos_left;
1003 ucontrol->value.integer.value[1] = p->qpos_right;
1004 spin_unlock_irqrestore(&p->q_lock, flags);
1005 return 0;
1006 }
1007
1008 static int snd_sb_qsound_space_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
1009 {
1010 struct snd_sb_csp *p = snd_kcontrol_chip(kcontrol);
1011 unsigned long flags;
1012 int change;
1013 unsigned char nval1, nval2;
1014
1015 nval1 = ucontrol->value.integer.value[0];
1016 if (nval1 > SNDRV_SB_CSP_QSOUND_MAX_RIGHT)
1017 nval1 = SNDRV_SB_CSP_QSOUND_MAX_RIGHT;
1018 nval2 = ucontrol->value.integer.value[1];
1019 if (nval2 > SNDRV_SB_CSP_QSOUND_MAX_RIGHT)
1020 nval2 = SNDRV_SB_CSP_QSOUND_MAX_RIGHT;
1021 spin_lock_irqsave(&p->q_lock, flags);
1022 change = p->qpos_left != nval1 || p->qpos_right != nval2;
1023 p->qpos_left = nval1;
1024 p->qpos_right = nval2;
1025 p->qpos_changed = change;
1026 spin_unlock_irqrestore(&p->q_lock, flags);
1027 return change;
1028 }
1029
1030 static struct snd_kcontrol_new snd_sb_qsound_switch = {
1031 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1032 .name = "3D Control - Switch",
1033 .info = snd_sb_qsound_switch_info,
1034 .get = snd_sb_qsound_switch_get,
1035 .put = snd_sb_qsound_switch_put
1036 };
1037
1038 static struct snd_kcontrol_new snd_sb_qsound_space = {
1039 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1040 .name = "3D Control - Space",
1041 .info = snd_sb_qsound_space_info,
1042 .get = snd_sb_qsound_space_get,
1043 .put = snd_sb_qsound_space_put
1044 };
1045
1046 static int snd_sb_qsound_build(struct snd_sb_csp * p)
1047 {
1048 struct snd_card *card;
1049 int err;
1050
1051 if (snd_BUG_ON(!p))
1052 return -EINVAL;
1053
1054 card = p->chip->card;
1055 p->qpos_left = p->qpos_right = SNDRV_SB_CSP_QSOUND_MAX_RIGHT / 2;
1056 p->qpos_changed = 0;
1057
1058 spin_lock_init(&p->q_lock);
1059
1060 if ((err = snd_ctl_add(card, p->qsound_switch = snd_ctl_new1(&snd_sb_qsound_switch, p))) < 0)
1061 goto __error;
1062 if ((err = snd_ctl_add(card, p->qsound_space = snd_ctl_new1(&snd_sb_qsound_space, p))) < 0)
1063 goto __error;
1064
1065 return 0;
1066
1067 __error:
1068 snd_sb_qsound_destroy(p);
1069 return err;
1070 }
1071
1072 static void snd_sb_qsound_destroy(struct snd_sb_csp * p)
1073 {
1074 struct snd_card *card;
1075 unsigned long flags;
1076
1077 if (snd_BUG_ON(!p))
1078 return;
1079
1080 card = p->chip->card;
1081
1082 down_write(&card->controls_rwsem);
1083 if (p->qsound_switch)
1084 snd_ctl_remove(card, p->qsound_switch);
1085 if (p->qsound_space)
1086 snd_ctl_remove(card, p->qsound_space);
1087 up_write(&card->controls_rwsem);
1088
1089 /* cancel pending transfer of QSound parameters */
1090 spin_lock_irqsave (&p->q_lock, flags);
1091 p->qpos_changed = 0;
1092 spin_unlock_irqrestore (&p->q_lock, flags);
1093 }
1094
1095 /*
1096 * Transfer qsound parameters to CSP,
1097 * function should be called from interrupt routine
1098 */
1099 static int snd_sb_csp_qsound_transfer(struct snd_sb_csp * p)
1100 {
1101 int err = -ENXIO;
1102
1103 spin_lock(&p->q_lock);
1104 if (p->running & SNDRV_SB_CSP_ST_QSOUND) {
1105 set_codec_parameter(p->chip, 0xe0, 0x01);
1106 /* left channel */
1107 set_codec_parameter(p->chip, 0x00, p->qpos_left);
1108 set_codec_parameter(p->chip, 0x02, 0x00);
1109 /* right channel */
1110 set_codec_parameter(p->chip, 0x00, p->qpos_right);
1111 set_codec_parameter(p->chip, 0x03, 0x00);
1112 err = 0;
1113 }
1114 p->qpos_changed = 0;
1115 spin_unlock(&p->q_lock);
1116 return err;
1117 }
1118
1119 /* ------------------------------ */
1120
1121 /*
1122 * proc interface
1123 */
1124 static int init_proc_entry(struct snd_sb_csp * p, int device)
1125 {
1126 char name[16];
1127 struct snd_info_entry *entry;
1128 sprintf(name, "cspD%d", device);
1129 if (! snd_card_proc_new(p->chip->card, name, &entry))
1130 snd_info_set_text_ops(entry, p, info_read);
1131 return 0;
1132 }
1133
1134 static void info_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
1135 {
1136 struct snd_sb_csp *p = entry->private_data;
1137
1138 snd_iprintf(buffer, "Creative Signal Processor [v%d.%d]\n", (p->version >> 4), (p->version & 0x0f));
1139 snd_iprintf(buffer, "State: %cx%c%c%c\n", ((p->running & SNDRV_SB_CSP_ST_QSOUND) ? 'Q' : '-'),
1140 ((p->running & SNDRV_SB_CSP_ST_PAUSED) ? 'P' : '-'),
1141 ((p->running & SNDRV_SB_CSP_ST_RUNNING) ? 'R' : '-'),
1142 ((p->running & SNDRV_SB_CSP_ST_LOADED) ? 'L' : '-'));
1143 if (p->running & SNDRV_SB_CSP_ST_LOADED) {
1144 snd_iprintf(buffer, "Codec: %s [func #%d]\n", p->codec_name, p->func_nr);
1145 snd_iprintf(buffer, "Sample rates: ");
1146 if (p->acc_rates == SNDRV_SB_CSP_RATE_ALL) {
1147 snd_iprintf(buffer, "All\n");
1148 } else {
1149 snd_iprintf(buffer, "%s%s%s%s\n",
1150 ((p->acc_rates & SNDRV_SB_CSP_RATE_8000) ? "8000Hz " : ""),
1151 ((p->acc_rates & SNDRV_SB_CSP_RATE_11025) ? "11025Hz " : ""),
1152 ((p->acc_rates & SNDRV_SB_CSP_RATE_22050) ? "22050Hz " : ""),
1153 ((p->acc_rates & SNDRV_SB_CSP_RATE_44100) ? "44100Hz" : ""));
1154 }
1155 if (p->mode == SNDRV_SB_CSP_MODE_QSOUND) {
1156 snd_iprintf(buffer, "QSound decoder %sabled\n",
1157 p->q_enabled ? "en" : "dis");
1158 } else {
1159 snd_iprintf(buffer, "PCM format ID: 0x%x (%s/%s) [%s/%s] [%s/%s]\n",
1160 p->acc_format,
1161 ((p->acc_width & SNDRV_SB_CSP_SAMPLE_16BIT) ? "16bit" : "-"),
1162 ((p->acc_width & SNDRV_SB_CSP_SAMPLE_8BIT) ? "8bit" : "-"),
1163 ((p->acc_channels & SNDRV_SB_CSP_MONO) ? "mono" : "-"),
1164 ((p->acc_channels & SNDRV_SB_CSP_STEREO) ? "stereo" : "-"),
1165 ((p->mode & SNDRV_SB_CSP_MODE_DSP_WRITE) ? "playback" : "-"),
1166 ((p->mode & SNDRV_SB_CSP_MODE_DSP_READ) ? "capture" : "-"));
1167 }
1168 }
1169 if (p->running & SNDRV_SB_CSP_ST_AUTO) {
1170 snd_iprintf(buffer, "Autoloaded Mu-Law, A-Law or Ima-ADPCM hardware codec\n");
1171 }
1172 if (p->running & SNDRV_SB_CSP_ST_RUNNING) {
1173 snd_iprintf(buffer, "Processing %dbit %s PCM samples\n",
1174 ((p->run_width & SNDRV_SB_CSP_SAMPLE_16BIT) ? 16 : 8),
1175 ((p->run_channels & SNDRV_SB_CSP_MONO) ? "mono" : "stereo"));
1176 }
1177 if (p->running & SNDRV_SB_CSP_ST_QSOUND) {
1178 snd_iprintf(buffer, "Qsound position: left = 0x%x, right = 0x%x\n",
1179 p->qpos_left, p->qpos_right);
1180 }
1181 }
1182
1183 /* */
1184
1185 EXPORT_SYMBOL(snd_sb_csp_new);
1186
1187 /*
1188 * INIT part
1189 */
1190
1191 static int __init alsa_sb_csp_init(void)
1192 {
1193 return 0;
1194 }
1195
1196 static void __exit alsa_sb_csp_exit(void)
1197 {
1198 }
1199
1200 module_init(alsa_sb_csp_init)
1201 module_exit(alsa_sb_csp_exit)
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