[ALSA] Remove xxx_t typedefs: ISA SB8/SB16/SBAWE
[linux-2.6.git] / sound / isa / sb / sb16_csp.c
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 <sound/driver.h>
27 #include <linux/delay.h>
28 #include <linux/init.h>
29 #include <linux/slab.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
40 #ifdef SNDRV_LITTLE_ENDIAN
41 #define CSP_HDR_VALUE(a,b,c,d)  ((a) | ((b)<<8) | ((c)<<16) | ((d)<<24))
42 #else
43 #define CSP_HDR_VALUE(a,b,c,d)  ((d) | ((c)<<8) | ((b)<<16) | ((a)<<24))
44 #endif
45
46 #define RIFF_HEADER     CSP_HDR_VALUE('R', 'I', 'F', 'F')
47 #define CSP__HEADER     CSP_HDR_VALUE('C', 'S', 'P', ' ')
48 #define LIST_HEADER     CSP_HDR_VALUE('L', 'I', 'S', 'T')
49 #define FUNC_HEADER     CSP_HDR_VALUE('f', 'u', 'n', 'c')
50 #define CODE_HEADER     CSP_HDR_VALUE('c', 'o', 'd', 'e')
51 #define INIT_HEADER     CSP_HDR_VALUE('i', 'n', 'i', 't')
52 #define MAIN_HEADER     CSP_HDR_VALUE('m', 'a', 'i', 'n')
53
54 /*
55  * RIFF data format
56  */
57 struct riff_header {
58         __u32 name;
59         __u32 len;
60 };
61
62 struct desc_header {
63         struct riff_header info;
64         __u16 func_nr;
65         __u16 VOC_type;
66         __u16 flags_play_rec;
67         __u16 flags_16bit_8bit;
68         __u16 flags_stereo_mono;
69         __u16 flags_rates;
70 };
71
72 /*
73  * prototypes
74  */
75 static void snd_sb_csp_free(struct snd_hwdep *hw);
76 static int snd_sb_csp_open(struct snd_hwdep * hw, struct file *file);
77 static int snd_sb_csp_ioctl(struct snd_hwdep * hw, struct file *file, unsigned int cmd, unsigned long arg);
78 static int snd_sb_csp_release(struct snd_hwdep * hw, struct file *file);
79
80 static int csp_detect(struct snd_sb *chip, int *version);
81 static int set_codec_parameter(struct snd_sb *chip, unsigned char par, unsigned char val);
82 static int set_register(struct snd_sb *chip, unsigned char reg, unsigned char val);
83 static int read_register(struct snd_sb *chip, unsigned char reg);
84 static int set_mode_register(struct snd_sb *chip, unsigned char mode);
85 static int get_version(struct snd_sb *chip);
86
87 static int snd_sb_csp_riff_load(struct snd_sb_csp * p,
88                                 struct snd_sb_csp_microcode __user * code);
89 static int snd_sb_csp_unload(struct snd_sb_csp * p);
90 static int snd_sb_csp_load_user(struct snd_sb_csp * p, const unsigned char __user *buf, int size, int load_flags);
91 static int snd_sb_csp_autoload(struct snd_sb_csp * p, int pcm_sfmt, int play_rec_mode);
92 static int snd_sb_csp_check_version(struct snd_sb_csp * p);
93
94 static int snd_sb_csp_use(struct snd_sb_csp * p);
95 static int snd_sb_csp_unuse(struct snd_sb_csp * p);
96 static int snd_sb_csp_start(struct snd_sb_csp * p, int sample_width, int channels);
97 static int snd_sb_csp_stop(struct snd_sb_csp * p);
98 static int snd_sb_csp_pause(struct snd_sb_csp * p);
99 static int snd_sb_csp_restart(struct snd_sb_csp * p);
100
101 static int snd_sb_qsound_build(struct snd_sb_csp * p);
102 static void snd_sb_qsound_destroy(struct snd_sb_csp * p);
103 static int snd_sb_csp_qsound_transfer(struct snd_sb_csp * p);
104
105 static int init_proc_entry(struct snd_sb_csp * p, int device);
106 static void info_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer);
107
108 /*
109  * Detect CSP chip and create a new instance
110  */
111 int snd_sb_csp_new(struct snd_sb *chip, int device, struct snd_hwdep ** rhwdep)
112 {
113         struct snd_sb_csp *p;
114         int version, err;
115         struct snd_hwdep *hw;
116
117         if (rhwdep)
118                 *rhwdep = NULL;
119
120         if (csp_detect(chip, &version))
121                 return -ENODEV;
122
123         if ((err = snd_hwdep_new(chip->card, "SB16-CSP", device, &hw)) < 0)
124                 return err;
125
126         if ((p = kzalloc(sizeof(*p), GFP_KERNEL)) == NULL) {
127                 snd_device_free(chip->card, hw);
128                 return -ENOMEM;
129         }
130         p->chip = chip;
131         p->version = version;
132
133         /* CSP operators */
134         p->ops.csp_use = snd_sb_csp_use;
135         p->ops.csp_unuse = snd_sb_csp_unuse;
136         p->ops.csp_autoload = snd_sb_csp_autoload;
137         p->ops.csp_start = snd_sb_csp_start;
138         p->ops.csp_stop = snd_sb_csp_stop;
139         p->ops.csp_qsound_transfer = snd_sb_csp_qsound_transfer;
140
141         init_MUTEX(&p->access_mutex);
142         sprintf(hw->name, "CSP v%d.%d", (version >> 4), (version & 0x0f));
143         hw->iface = SNDRV_HWDEP_IFACE_SB16CSP;
144         hw->private_data = p;
145         hw->private_free = snd_sb_csp_free;
146
147         /* operators - only write/ioctl */
148         hw->ops.open = snd_sb_csp_open;
149         hw->ops.ioctl = snd_sb_csp_ioctl;
150         hw->ops.release = snd_sb_csp_release;
151
152         /* create a proc entry */
153         init_proc_entry(p, device);
154         if (rhwdep)
155                 *rhwdep = hw;
156         return 0;
157 }
158
159 /*
160  * free_private for hwdep instance
161  */
162 static void snd_sb_csp_free(struct snd_hwdep *hwdep)
163 {
164         struct snd_sb_csp *p = hwdep->private_data;
165         if (p) {
166                 if (p->running & SNDRV_SB_CSP_ST_RUNNING)
167                         snd_sb_csp_stop(p);
168                 kfree(p);
169         }
170 }
171
172 /* ------------------------------ */
173
174 /*
175  * open the device exclusively
176  */
177 static int snd_sb_csp_open(struct snd_hwdep * hw, struct file *file)
178 {
179         struct snd_sb_csp *p = hw->private_data;
180         return (snd_sb_csp_use(p));
181 }
182
183 /*
184  * ioctl for hwdep device:
185  */
186 static int snd_sb_csp_ioctl(struct snd_hwdep * hw, struct file *file, unsigned int cmd, unsigned long arg)
187 {
188         struct snd_sb_csp *p = hw->private_data;
189         struct snd_sb_csp_info info;
190         struct snd_sb_csp_start start_info;
191         int err;
192
193         snd_assert(p != NULL, return -EINVAL);
194
195         if (snd_sb_csp_check_version(p))
196                 return -ENODEV;
197
198         switch (cmd) {
199                 /* get information */
200         case SNDRV_SB_CSP_IOCTL_INFO:
201                 *info.codec_name = *p->codec_name;
202                 info.func_nr = p->func_nr;
203                 info.acc_format = p->acc_format;
204                 info.acc_channels = p->acc_channels;
205                 info.acc_width = p->acc_width;
206                 info.acc_rates = p->acc_rates;
207                 info.csp_mode = p->mode;
208                 info.run_channels = p->run_channels;
209                 info.run_width = p->run_width;
210                 info.version = p->version;
211                 info.state = p->running;
212                 if (copy_to_user((void __user *)arg, &info, sizeof(info)))
213                         err = -EFAULT;
214                 else
215                         err = 0;
216                 break;
217
218                 /* load CSP microcode */
219         case SNDRV_SB_CSP_IOCTL_LOAD_CODE:
220                 err = (p->running & SNDRV_SB_CSP_ST_RUNNING ?
221                        -EBUSY : snd_sb_csp_riff_load(p, (struct snd_sb_csp_microcode __user *) arg));
222                 break;
223         case SNDRV_SB_CSP_IOCTL_UNLOAD_CODE:
224                 err = (p->running & SNDRV_SB_CSP_ST_RUNNING ?
225                        -EBUSY : snd_sb_csp_unload(p));
226                 break;
227
228                 /* change CSP running state */
229         case SNDRV_SB_CSP_IOCTL_START:
230                 if (copy_from_user(&start_info, (void __user *) arg, sizeof(start_info)))
231                         err = -EFAULT;
232                 else
233                         err = snd_sb_csp_start(p, start_info.sample_width, start_info.channels);
234                 break;
235         case SNDRV_SB_CSP_IOCTL_STOP:
236                 err = snd_sb_csp_stop(p);
237                 break;
238         case SNDRV_SB_CSP_IOCTL_PAUSE:
239                 err = snd_sb_csp_pause(p);
240                 break;
241         case SNDRV_SB_CSP_IOCTL_RESTART:
242                 err = snd_sb_csp_restart(p);
243                 break;
244         default:
245                 err = -ENOTTY;
246                 break;
247         }
248
249         return err;
250 }
251
252 /*
253  * close the device
254  */
255 static int snd_sb_csp_release(struct snd_hwdep * hw, struct file *file)
256 {
257         struct snd_sb_csp *p = hw->private_data;
258         return (snd_sb_csp_unuse(p));
259 }
260
261 /* ------------------------------ */
262
263 /*
264  * acquire device
265  */
266 static int snd_sb_csp_use(struct snd_sb_csp * p)
267 {
268         down(&p->access_mutex);
269         if (p->used) {
270                 up(&p->access_mutex);
271                 return -EAGAIN;
272         }
273         p->used++;
274         up(&p->access_mutex);
275
276         return 0;
277
278 }
279
280 /*
281  * release device
282  */
283 static int snd_sb_csp_unuse(struct snd_sb_csp * p)
284 {
285         down(&p->access_mutex);
286         p->used--;
287         up(&p->access_mutex);
288
289         return 0;
290 }
291
292 /*
293  * load microcode via ioctl: 
294  * code is user-space pointer
295  */
296 static int snd_sb_csp_riff_load(struct snd_sb_csp * p,
297                                 struct snd_sb_csp_microcode __user * mcode)
298 {
299         struct snd_sb_csp_mc_header info;
300
301         unsigned char __user *data_ptr;
302         unsigned char __user *data_end;
303         unsigned short func_nr = 0;
304
305         struct riff_header file_h, item_h, code_h;
306         __u32 item_type;
307         struct desc_header funcdesc_h;
308
309         unsigned long flags;
310         int err;
311
312         if (copy_from_user(&info, mcode, sizeof(info)))
313                 return -EFAULT;
314         data_ptr = mcode->data;
315
316         if (copy_from_user(&file_h, data_ptr, sizeof(file_h)))
317                 return -EFAULT;
318         if ((file_h.name != RIFF_HEADER) ||
319             (le32_to_cpu(file_h.len) >= SNDRV_SB_CSP_MAX_MICROCODE_FILE_SIZE - sizeof(file_h))) {
320                 snd_printd("%s: Invalid RIFF header\n", __FUNCTION__);
321                 return -EINVAL;
322         }
323         data_ptr += sizeof(file_h);
324         data_end = data_ptr + le32_to_cpu(file_h.len);
325
326         if (copy_from_user(&item_type, data_ptr, sizeof(item_type)))
327                 return -EFAULT;
328         if (item_type != CSP__HEADER) {
329                 snd_printd("%s: Invalid RIFF file type\n", __FUNCTION__);
330                 return -EINVAL;
331         }
332         data_ptr += sizeof (item_type);
333
334         for (; data_ptr < data_end; data_ptr += le32_to_cpu(item_h.len)) {
335                 if (copy_from_user(&item_h, data_ptr, sizeof(item_h)))
336                         return -EFAULT;
337                 data_ptr += sizeof(item_h);
338                 if (item_h.name != LIST_HEADER)
339                         continue;
340
341                 if (copy_from_user(&item_type, data_ptr, sizeof(item_type)))
342                          return -EFAULT;
343                 switch (item_type) {
344                 case FUNC_HEADER:
345                         if (copy_from_user(&funcdesc_h, data_ptr + sizeof(item_type), sizeof(funcdesc_h)))
346                                 return -EFAULT;
347                         func_nr = le16_to_cpu(funcdesc_h.func_nr);
348                         break;
349                 case CODE_HEADER:
350                         if (func_nr != info.func_req)
351                                 break;  /* not required function, try next */
352                         data_ptr += sizeof(item_type);
353
354                         /* destroy QSound mixer element */
355                         if (p->mode == SNDRV_SB_CSP_MODE_QSOUND) {
356                                 snd_sb_qsound_destroy(p);
357                         }
358                         /* Clear all flags */
359                         p->running = 0;
360                         p->mode = 0;
361
362                         /* load microcode blocks */
363                         for (;;) {
364                                 if (data_ptr >= data_end)
365                                         return -EINVAL;
366                                 if (copy_from_user(&code_h, data_ptr, sizeof(code_h)))
367                                         return -EFAULT;
368
369                                 /* init microcode blocks */
370                                 if (code_h.name != INIT_HEADER)
371                                         break;
372                                 data_ptr += sizeof(code_h);
373                                 err = snd_sb_csp_load_user(p, data_ptr, le32_to_cpu(code_h.len),
374                                                       SNDRV_SB_CSP_LOAD_INITBLOCK);
375                                 if (err)
376                                         return err;
377                                 data_ptr += le32_to_cpu(code_h.len);
378                         }
379                         /* main microcode block */
380                         if (copy_from_user(&code_h, data_ptr, sizeof(code_h)))
381                                 return -EFAULT;
382
383                         if (code_h.name != MAIN_HEADER) {
384                                 snd_printd("%s: Missing 'main' microcode\n", __FUNCTION__);
385                                 return -EINVAL;
386                         }
387                         data_ptr += sizeof(code_h);
388                         err = snd_sb_csp_load_user(p, data_ptr,
389                                                    le32_to_cpu(code_h.len), 0);
390                         if (err)
391                                 return err;
392
393                         /* fill in codec header */
394                         strlcpy(p->codec_name, info.codec_name, sizeof(p->codec_name));
395                         p->func_nr = func_nr;
396                         p->mode = le16_to_cpu(funcdesc_h.flags_play_rec);
397                         switch (le16_to_cpu(funcdesc_h.VOC_type)) {
398                         case 0x0001:    /* QSound decoder */
399                                 if (le16_to_cpu(funcdesc_h.flags_play_rec) == SNDRV_SB_CSP_MODE_DSP_WRITE) {
400                                         if (snd_sb_qsound_build(p) == 0)
401                                                 /* set QSound flag and clear all other mode flags */
402                                                 p->mode = SNDRV_SB_CSP_MODE_QSOUND;
403                                 }
404                                 p->acc_format = 0;
405                                 break;
406                         case 0x0006:    /* A Law codec */
407                                 p->acc_format = SNDRV_PCM_FMTBIT_A_LAW;
408                                 break;
409                         case 0x0007:    /* Mu Law codec */
410                                 p->acc_format = SNDRV_PCM_FMTBIT_MU_LAW;
411                                 break;
412                         case 0x0011:    /* what Creative thinks is IMA ADPCM codec */
413                         case 0x0200:    /* Creative ADPCM codec */
414                                 p->acc_format = SNDRV_PCM_FMTBIT_IMA_ADPCM;
415                                 break;
416                         case    201:    /* Text 2 Speech decoder */
417                                 /* TODO: Text2Speech handling routines */
418                                 p->acc_format = 0;
419                                 break;
420                         case 0x0202:    /* Fast Speech 8 codec */
421                         case 0x0203:    /* Fast Speech 10 codec */
422                                 p->acc_format = SNDRV_PCM_FMTBIT_SPECIAL;
423                                 break;
424                         default:        /* other codecs are unsupported */
425                                 p->acc_format = p->acc_width = p->acc_rates = 0;
426                                 p->mode = 0;
427                                 snd_printd("%s: Unsupported CSP codec type: 0x%04x\n",
428                                            __FUNCTION__,
429                                            le16_to_cpu(funcdesc_h.VOC_type));
430                                 return -EINVAL;
431                         }
432                         p->acc_channels = le16_to_cpu(funcdesc_h.flags_stereo_mono);
433                         p->acc_width = le16_to_cpu(funcdesc_h.flags_16bit_8bit);
434                         p->acc_rates = le16_to_cpu(funcdesc_h.flags_rates);
435
436                         /* Decouple CSP from IRQ and DMAREQ lines */
437                         spin_lock_irqsave(&p->chip->reg_lock, flags);
438                         set_mode_register(p->chip, 0xfc);
439                         set_mode_register(p->chip, 0x00);
440                         spin_unlock_irqrestore(&p->chip->reg_lock, flags);
441
442                         /* finished loading successfully */
443                         p->running = SNDRV_SB_CSP_ST_LOADED;    /* set LOADED flag */
444                         return 0;
445                 }
446         }
447         snd_printd("%s: Function #%d not found\n", __FUNCTION__, info.func_req);
448         return -EINVAL;
449 }
450
451 /*
452  * unload CSP microcode
453  */
454 static int snd_sb_csp_unload(struct snd_sb_csp * p)
455 {
456         if (p->running & SNDRV_SB_CSP_ST_RUNNING)
457                 return -EBUSY;
458         if (!(p->running & SNDRV_SB_CSP_ST_LOADED))
459                 return -ENXIO;
460
461         /* clear supported formats */
462         p->acc_format = 0;
463         p->acc_channels = p->acc_width = p->acc_rates = 0;
464         /* destroy QSound mixer element */
465         if (p->mode == SNDRV_SB_CSP_MODE_QSOUND) {
466                 snd_sb_qsound_destroy(p);
467         }
468         /* clear all flags */
469         p->running = 0;
470         p->mode = 0;
471         return 0;
472 }
473
474 /*
475  * send command sequence to DSP
476  */
477 static inline int command_seq(struct snd_sb *chip, const unsigned char *seq, int size)
478 {
479         int i;
480         for (i = 0; i < size; i++) {
481                 if (!snd_sbdsp_command(chip, seq[i]))
482                         return -EIO;
483         }
484         return 0;
485 }
486
487 /*
488  * set CSP codec parameter
489  */
490 static int set_codec_parameter(struct snd_sb *chip, unsigned char par, unsigned char val)
491 {
492         unsigned char dsp_cmd[3];
493
494         dsp_cmd[0] = 0x05;      /* CSP set codec parameter */
495         dsp_cmd[1] = val;       /* Parameter value */
496         dsp_cmd[2] = par;       /* Parameter */
497         command_seq(chip, dsp_cmd, 3);
498         snd_sbdsp_command(chip, 0x03);  /* DSP read? */
499         if (snd_sbdsp_get_byte(chip) != par)
500                 return -EIO;
501         return 0;
502 }
503
504 /*
505  * set CSP register
506  */
507 static int set_register(struct snd_sb *chip, unsigned char reg, unsigned char val)
508 {
509         unsigned char dsp_cmd[3];
510
511         dsp_cmd[0] = 0x0e;      /* CSP set register */
512         dsp_cmd[1] = reg;       /* CSP Register */
513         dsp_cmd[2] = val;       /* value */
514         return command_seq(chip, dsp_cmd, 3);
515 }
516
517 /*
518  * read CSP register
519  * return < 0 -> error
520  */
521 static int read_register(struct snd_sb *chip, unsigned char reg)
522 {
523         unsigned char dsp_cmd[2];
524
525         dsp_cmd[0] = 0x0f;      /* CSP read register */
526         dsp_cmd[1] = reg;       /* CSP Register */
527         command_seq(chip, dsp_cmd, 2);
528         return snd_sbdsp_get_byte(chip);        /* Read DSP value */
529 }
530
531 /*
532  * set CSP mode register
533  */
534 static int set_mode_register(struct snd_sb *chip, unsigned char mode)
535 {
536         unsigned char dsp_cmd[2];
537
538         dsp_cmd[0] = 0x04;      /* CSP set mode register */
539         dsp_cmd[1] = mode;      /* mode */
540         return command_seq(chip, dsp_cmd, 2);
541 }
542
543 /*
544  * Detect CSP
545  * return 0 if CSP exists.
546  */
547 static int csp_detect(struct snd_sb *chip, int *version)
548 {
549         unsigned char csp_test1, csp_test2;
550         unsigned long flags;
551         int result = -ENODEV;
552
553         spin_lock_irqsave(&chip->reg_lock, flags);
554
555         set_codec_parameter(chip, 0x00, 0x00);
556         set_mode_register(chip, 0xfc);          /* 0xfc = ?? */
557
558         csp_test1 = read_register(chip, 0x83);
559         set_register(chip, 0x83, ~csp_test1);
560         csp_test2 = read_register(chip, 0x83);
561         if (csp_test2 != (csp_test1 ^ 0xff))
562                 goto __fail;
563
564         set_register(chip, 0x83, csp_test1);
565         csp_test2 = read_register(chip, 0x83);
566         if (csp_test2 != csp_test1)
567                 goto __fail;
568
569         set_mode_register(chip, 0x00);          /* 0x00 = ? */
570
571         *version = get_version(chip);
572         snd_sbdsp_reset(chip);  /* reset DSP after getversion! */
573         if (*version >= 0x10 && *version <= 0x1f)
574                 result = 0;             /* valid version id */
575
576       __fail:
577         spin_unlock_irqrestore(&chip->reg_lock, flags);
578         return result;
579 }
580
581 /*
582  * get CSP version number
583  */
584 static int get_version(struct snd_sb *chip)
585 {
586         unsigned char dsp_cmd[2];
587
588         dsp_cmd[0] = 0x08;      /* SB_DSP_!something! */
589         dsp_cmd[1] = 0x03;      /* get chip version id? */
590         command_seq(chip, dsp_cmd, 2);
591
592         return (snd_sbdsp_get_byte(chip));
593 }
594
595 /*
596  * check if the CSP version is valid
597  */
598 static int snd_sb_csp_check_version(struct snd_sb_csp * p)
599 {
600         if (p->version < 0x10 || p->version > 0x1f) {
601                 snd_printd("%s: Invalid CSP version: 0x%x\n", __FUNCTION__, p->version);
602                 return 1;
603         }
604         return 0;
605 }
606
607 /*
608  * download microcode to CSP (microcode should have one "main" block).
609  */
610 static int snd_sb_csp_load(struct snd_sb_csp * p, const unsigned char *buf, int size, int load_flags)
611 {
612         int status, i;
613         int err;
614         int result = -EIO;
615         unsigned long flags;
616
617         spin_lock_irqsave(&p->chip->reg_lock, flags);
618         snd_sbdsp_command(p->chip, 0x01);       /* CSP download command */
619         if (snd_sbdsp_get_byte(p->chip)) {
620                 snd_printd("%s: Download command failed\n", __FUNCTION__);
621                 goto __fail;
622         }
623         /* Send CSP low byte (size - 1) */
624         snd_sbdsp_command(p->chip, (unsigned char)(size - 1));
625         /* Send high byte */
626         snd_sbdsp_command(p->chip, (unsigned char)((size - 1) >> 8));
627         /* send microcode sequence */
628         /* load from kernel space */
629         while (size--) {
630                 if (!snd_sbdsp_command(p->chip, *buf++))
631                         goto __fail;
632         }
633         if (snd_sbdsp_get_byte(p->chip))
634                 goto __fail;
635
636         if (load_flags & SNDRV_SB_CSP_LOAD_INITBLOCK) {
637                 i = 0;
638                 /* some codecs (FastSpeech) take some time to initialize */
639                 while (1) {
640                         snd_sbdsp_command(p->chip, 0x03);
641                         status = snd_sbdsp_get_byte(p->chip);
642                         if (status == 0x55 || ++i >= 10)
643                                 break;
644                         udelay (10);
645                 }
646                 if (status != 0x55) {
647                         snd_printd("%s: Microcode initialization failed\n", __FUNCTION__);
648                         goto __fail;
649                 }
650         } else {
651                 /*
652                  * Read mixer register SB_DSP4_DMASETUP after loading 'main' code.
653                  * Start CSP chip if no 16bit DMA channel is set - some kind
654                  * of autorun or perhaps a bugfix?
655                  */
656                 spin_lock(&p->chip->mixer_lock);
657                 status = snd_sbmixer_read(p->chip, SB_DSP4_DMASETUP);
658                 spin_unlock(&p->chip->mixer_lock);
659                 if (!(status & (SB_DMASETUP_DMA7 | SB_DMASETUP_DMA6 | SB_DMASETUP_DMA5))) {
660                         err = (set_codec_parameter(p->chip, 0xaa, 0x00) ||
661                                set_codec_parameter(p->chip, 0xff, 0x00));
662                         snd_sbdsp_reset(p->chip);               /* really! */
663                         if (err)
664                                 goto __fail;
665                         set_mode_register(p->chip, 0xc0);       /* c0 = STOP */
666                         set_mode_register(p->chip, 0x70);       /* 70 = RUN */
667                 }
668         }
669         result = 0;
670
671       __fail:
672         spin_unlock_irqrestore(&p->chip->reg_lock, flags);
673         return result;
674 }
675  
676 static int snd_sb_csp_load_user(struct snd_sb_csp * p, const unsigned char __user *buf, int size, int load_flags)
677 {
678         int err = -ENOMEM;
679         unsigned char *kbuf = kmalloc(size, GFP_KERNEL);
680         if (kbuf) {
681                 if (copy_from_user(kbuf, buf, size))
682                         err = -EFAULT;
683                 else
684                         err = snd_sb_csp_load(p, kbuf, size, load_flags);
685                 kfree(kbuf);
686         }
687         return err;
688 }
689
690 #include "sb16_csp_codecs.h"
691
692 /*
693  * autoload hardware codec if necessary
694  * return 0 if CSP is loaded and ready to run (p->running != 0)
695  */
696 static int snd_sb_csp_autoload(struct snd_sb_csp * p, int pcm_sfmt, int play_rec_mode)
697 {
698         unsigned long flags;
699         int err = 0;
700
701         /* if CSP is running or manually loaded then exit */
702         if (p->running & (SNDRV_SB_CSP_ST_RUNNING | SNDRV_SB_CSP_ST_LOADED)) 
703                 return -EBUSY;
704
705         /* autoload microcode only if requested hardware codec is not already loaded */
706         if (((1 << pcm_sfmt) & p->acc_format) && (play_rec_mode & p->mode)) {
707                 p->running = SNDRV_SB_CSP_ST_AUTO;
708         } else {
709                 switch (pcm_sfmt) {
710                 case SNDRV_PCM_FORMAT_MU_LAW:
711                         err = snd_sb_csp_load(p, &mulaw_main[0], sizeof(mulaw_main), 0);
712                         p->acc_format = SNDRV_PCM_FMTBIT_MU_LAW;
713                         p->mode = SNDRV_SB_CSP_MODE_DSP_READ | SNDRV_SB_CSP_MODE_DSP_WRITE;
714                         break;
715                 case SNDRV_PCM_FORMAT_A_LAW:
716                         err = snd_sb_csp_load(p, &alaw_main[0], sizeof(alaw_main), 0);
717                         p->acc_format = SNDRV_PCM_FMTBIT_A_LAW;
718                         p->mode = SNDRV_SB_CSP_MODE_DSP_READ | SNDRV_SB_CSP_MODE_DSP_WRITE;
719                         break;
720                 case SNDRV_PCM_FORMAT_IMA_ADPCM:
721                         err = snd_sb_csp_load(p, &ima_adpcm_init[0], sizeof(ima_adpcm_init),
722                                               SNDRV_SB_CSP_LOAD_INITBLOCK);
723                         if (err)
724                                 break;
725                         if (play_rec_mode == SNDRV_SB_CSP_MODE_DSP_WRITE) {
726                                 err = snd_sb_csp_load(p, &ima_adpcm_playback[0],
727                                                       sizeof(ima_adpcm_playback), 0);
728                                 p->mode = SNDRV_SB_CSP_MODE_DSP_WRITE;
729                         } else {
730                                 err = snd_sb_csp_load(p, &ima_adpcm_capture[0],
731                                                       sizeof(ima_adpcm_capture), 0);
732                                 p->mode = SNDRV_SB_CSP_MODE_DSP_READ;
733                         }
734                         p->acc_format = SNDRV_PCM_FMTBIT_IMA_ADPCM;
735                         break;                            
736                 default:
737                         /* Decouple CSP from IRQ and DMAREQ lines */
738                         if (p->running & SNDRV_SB_CSP_ST_AUTO) {
739                                 spin_lock_irqsave(&p->chip->reg_lock, flags);
740                                 set_mode_register(p->chip, 0xfc);
741                                 set_mode_register(p->chip, 0x00);
742                                 spin_unlock_irqrestore(&p->chip->reg_lock, flags);
743                                 p->running = 0;                 /* clear autoloaded flag */
744                         }
745                         return -EINVAL;
746                 }
747                 if (err) {
748                         p->acc_format = 0;
749                         p->acc_channels = p->acc_width = p->acc_rates = 0;
750
751                         p->running = 0;                         /* clear autoloaded flag */
752                         p->mode = 0;
753                         return (err);
754                 } else {
755                         p->running = SNDRV_SB_CSP_ST_AUTO;      /* set autoloaded flag */
756                         p->acc_width = SNDRV_SB_CSP_SAMPLE_16BIT;       /* only 16 bit data */
757                         p->acc_channels = SNDRV_SB_CSP_MONO | SNDRV_SB_CSP_STEREO;
758                         p->acc_rates = SNDRV_SB_CSP_RATE_ALL;   /* HW codecs accept all rates */
759                 }   
760
761         }
762         return (p->running & SNDRV_SB_CSP_ST_AUTO) ? 0 : -ENXIO;
763 }
764
765 /*
766  * start CSP
767  */
768 static int snd_sb_csp_start(struct snd_sb_csp * p, int sample_width, int channels)
769 {
770         unsigned char s_type;   /* sample type */
771         unsigned char mixL, mixR;
772         int result = -EIO;
773         unsigned long flags;
774
775         if (!(p->running & (SNDRV_SB_CSP_ST_LOADED | SNDRV_SB_CSP_ST_AUTO))) {
776                 snd_printd("%s: Microcode not loaded\n", __FUNCTION__);
777                 return -ENXIO;
778         }
779         if (p->running & SNDRV_SB_CSP_ST_RUNNING) {
780                 snd_printd("%s: CSP already running\n", __FUNCTION__);
781                 return -EBUSY;
782         }
783         if (!(sample_width & p->acc_width)) {
784                 snd_printd("%s: Unsupported PCM sample width\n", __FUNCTION__);
785                 return -EINVAL;
786         }
787         if (!(channels & p->acc_channels)) {
788                 snd_printd("%s: Invalid number of channels\n", __FUNCTION__);
789                 return -EINVAL;
790         }
791
792         /* Mute PCM volume */
793         spin_lock_irqsave(&p->chip->mixer_lock, flags);
794         mixL = snd_sbmixer_read(p->chip, SB_DSP4_PCM_DEV);
795         mixR = snd_sbmixer_read(p->chip, SB_DSP4_PCM_DEV + 1);
796         snd_sbmixer_write(p->chip, SB_DSP4_PCM_DEV, mixL & 0x7);
797         snd_sbmixer_write(p->chip, SB_DSP4_PCM_DEV + 1, mixR & 0x7);
798
799         spin_lock(&p->chip->reg_lock);
800         set_mode_register(p->chip, 0xc0);       /* c0 = STOP */
801         set_mode_register(p->chip, 0x70);       /* 70 = RUN */
802
803         s_type = 0x00;
804         if (channels == SNDRV_SB_CSP_MONO)
805                 s_type = 0x11;  /* 000n 000n    (n = 1 if mono) */
806         if (sample_width == SNDRV_SB_CSP_SAMPLE_8BIT)
807                 s_type |= 0x22; /* 00dX 00dX    (d = 1 if 8 bit samples) */
808
809         if (set_codec_parameter(p->chip, 0x81, s_type)) {
810                 snd_printd("%s: Set sample type command failed\n", __FUNCTION__);
811                 goto __fail;
812         }
813         if (set_codec_parameter(p->chip, 0x80, 0x00)) {
814                 snd_printd("%s: Codec start command failed\n", __FUNCTION__);
815                 goto __fail;
816         }
817         p->run_width = sample_width;
818         p->run_channels = channels;
819
820         p->running |= SNDRV_SB_CSP_ST_RUNNING;
821
822         if (p->mode & SNDRV_SB_CSP_MODE_QSOUND) {
823                 set_codec_parameter(p->chip, 0xe0, 0x01);
824                 /* enable QSound decoder */
825                 set_codec_parameter(p->chip, 0x00, 0xff);
826                 set_codec_parameter(p->chip, 0x01, 0xff);
827                 p->running |= SNDRV_SB_CSP_ST_QSOUND;
828                 /* set QSound startup value */
829                 snd_sb_csp_qsound_transfer(p);
830         }
831         result = 0;
832
833       __fail:
834         spin_unlock(&p->chip->reg_lock);
835
836         /* restore PCM volume */
837         snd_sbmixer_write(p->chip, SB_DSP4_PCM_DEV, mixL);
838         snd_sbmixer_write(p->chip, SB_DSP4_PCM_DEV + 1, mixR);
839         spin_unlock_irqrestore(&p->chip->mixer_lock, flags);
840
841         return result;
842 }
843
844 /*
845  * stop CSP
846  */
847 static int snd_sb_csp_stop(struct snd_sb_csp * p)
848 {
849         int result;
850         unsigned char mixL, mixR;
851         unsigned long flags;
852
853         if (!(p->running & SNDRV_SB_CSP_ST_RUNNING))
854                 return 0;
855
856         /* Mute PCM volume */
857         spin_lock_irqsave(&p->chip->mixer_lock, flags);
858         mixL = snd_sbmixer_read(p->chip, SB_DSP4_PCM_DEV);
859         mixR = snd_sbmixer_read(p->chip, SB_DSP4_PCM_DEV + 1);
860         snd_sbmixer_write(p->chip, SB_DSP4_PCM_DEV, mixL & 0x7);
861         snd_sbmixer_write(p->chip, SB_DSP4_PCM_DEV + 1, mixR & 0x7);
862
863         spin_lock(&p->chip->reg_lock);
864         if (p->running & SNDRV_SB_CSP_ST_QSOUND) {
865                 set_codec_parameter(p->chip, 0xe0, 0x01);
866                 /* disable QSound decoder */
867                 set_codec_parameter(p->chip, 0x00, 0x00);
868                 set_codec_parameter(p->chip, 0x01, 0x00);
869
870                 p->running &= ~SNDRV_SB_CSP_ST_QSOUND;
871         }
872         result = set_mode_register(p->chip, 0xc0);      /* c0 = STOP */
873         spin_unlock(&p->chip->reg_lock);
874
875         /* restore PCM volume */
876         snd_sbmixer_write(p->chip, SB_DSP4_PCM_DEV, mixL);
877         snd_sbmixer_write(p->chip, SB_DSP4_PCM_DEV + 1, mixR);
878         spin_unlock_irqrestore(&p->chip->mixer_lock, flags);
879
880         if (!(result))
881                 p->running &= ~(SNDRV_SB_CSP_ST_PAUSED | SNDRV_SB_CSP_ST_RUNNING);
882         return result;
883 }
884
885 /*
886  * pause CSP codec and hold DMA transfer
887  */
888 static int snd_sb_csp_pause(struct snd_sb_csp * p)
889 {
890         int result;
891         unsigned long flags;
892
893         if (!(p->running & SNDRV_SB_CSP_ST_RUNNING))
894                 return -EBUSY;
895
896         spin_lock_irqsave(&p->chip->reg_lock, flags);
897         result = set_codec_parameter(p->chip, 0x80, 0xff);
898         spin_unlock_irqrestore(&p->chip->reg_lock, flags);
899         if (!(result))
900                 p->running |= SNDRV_SB_CSP_ST_PAUSED;
901
902         return result;
903 }
904
905 /*
906  * restart CSP codec and resume DMA transfer
907  */
908 static int snd_sb_csp_restart(struct snd_sb_csp * p)
909 {
910         int result;
911         unsigned long flags;
912
913         if (!(p->running & SNDRV_SB_CSP_ST_PAUSED))
914                 return -EBUSY;
915
916         spin_lock_irqsave(&p->chip->reg_lock, flags);
917         result = set_codec_parameter(p->chip, 0x80, 0x00);
918         spin_unlock_irqrestore(&p->chip->reg_lock, flags);
919         if (!(result))
920                 p->running &= ~SNDRV_SB_CSP_ST_PAUSED;
921
922         return result;
923 }
924
925 /* ------------------------------ */
926
927 /*
928  * QSound mixer control for PCM
929  */
930
931 static int snd_sb_qsound_switch_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
932 {
933         uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
934         uinfo->count = 1;
935         uinfo->value.integer.min = 0;
936         uinfo->value.integer.max = 1;
937         return 0;
938 }
939
940 static int snd_sb_qsound_switch_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
941 {
942         struct snd_sb_csp *p = snd_kcontrol_chip(kcontrol);
943         
944         ucontrol->value.integer.value[0] = p->q_enabled ? 1 : 0;
945         return 0;
946 }
947
948 static int snd_sb_qsound_switch_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
949 {
950         struct snd_sb_csp *p = snd_kcontrol_chip(kcontrol);
951         unsigned long flags;
952         int change;
953         unsigned char nval;
954         
955         nval = ucontrol->value.integer.value[0] & 0x01;
956         spin_lock_irqsave(&p->q_lock, flags);
957         change = p->q_enabled != nval;
958         p->q_enabled = nval;
959         spin_unlock_irqrestore(&p->q_lock, flags);
960         return change;
961 }
962
963 static int snd_sb_qsound_space_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
964 {
965         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
966         uinfo->count = 2;
967         uinfo->value.integer.min = 0;
968         uinfo->value.integer.max = SNDRV_SB_CSP_QSOUND_MAX_RIGHT;
969         return 0;
970 }
971
972 static int snd_sb_qsound_space_get(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         
977         spin_lock_irqsave(&p->q_lock, flags);
978         ucontrol->value.integer.value[0] = p->qpos_left;
979         ucontrol->value.integer.value[1] = p->qpos_right;
980         spin_unlock_irqrestore(&p->q_lock, flags);
981         return 0;
982 }
983
984 static int snd_sb_qsound_space_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
985 {
986         struct snd_sb_csp *p = snd_kcontrol_chip(kcontrol);
987         unsigned long flags;
988         int change;
989         unsigned char nval1, nval2;
990         
991         nval1 = ucontrol->value.integer.value[0];
992         if (nval1 > SNDRV_SB_CSP_QSOUND_MAX_RIGHT)
993                 nval1 = SNDRV_SB_CSP_QSOUND_MAX_RIGHT;
994         nval2 = ucontrol->value.integer.value[1];
995         if (nval2 > SNDRV_SB_CSP_QSOUND_MAX_RIGHT)
996                 nval2 = SNDRV_SB_CSP_QSOUND_MAX_RIGHT;
997         spin_lock_irqsave(&p->q_lock, flags);
998         change = p->qpos_left != nval1 || p->qpos_right != nval2;
999         p->qpos_left = nval1;
1000         p->qpos_right = nval2;
1001         p->qpos_changed = change;
1002         spin_unlock_irqrestore(&p->q_lock, flags);
1003         return change;
1004 }
1005
1006 static struct snd_kcontrol_new snd_sb_qsound_switch = {
1007         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1008         .name = "3D Control - Switch",
1009         .info = snd_sb_qsound_switch_info,
1010         .get = snd_sb_qsound_switch_get,
1011         .put = snd_sb_qsound_switch_put
1012 };
1013
1014 static struct snd_kcontrol_new snd_sb_qsound_space = {
1015         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1016         .name = "3D Control - Space",
1017         .info = snd_sb_qsound_space_info,
1018         .get = snd_sb_qsound_space_get,
1019         .put = snd_sb_qsound_space_put
1020 };
1021
1022 static int snd_sb_qsound_build(struct snd_sb_csp * p)
1023 {
1024         struct snd_card *card;
1025         int err;
1026
1027         snd_assert(p != NULL, return -EINVAL);
1028
1029         card = p->chip->card;
1030         p->qpos_left = p->qpos_right = SNDRV_SB_CSP_QSOUND_MAX_RIGHT / 2;
1031         p->qpos_changed = 0;
1032
1033         spin_lock_init(&p->q_lock);
1034
1035         if ((err = snd_ctl_add(card, p->qsound_switch = snd_ctl_new1(&snd_sb_qsound_switch, p))) < 0)
1036                 goto __error;
1037         if ((err = snd_ctl_add(card, p->qsound_space = snd_ctl_new1(&snd_sb_qsound_space, p))) < 0)
1038                 goto __error;
1039
1040         return 0;
1041
1042      __error:
1043         snd_sb_qsound_destroy(p);
1044         return err;
1045 }
1046
1047 static void snd_sb_qsound_destroy(struct snd_sb_csp * p)
1048 {
1049         struct snd_card *card;
1050         unsigned long flags;
1051
1052         snd_assert(p != NULL, return);
1053
1054         card = p->chip->card;   
1055         
1056         down_write(&card->controls_rwsem);
1057         if (p->qsound_switch)
1058                 snd_ctl_remove(card, p->qsound_switch);
1059         if (p->qsound_space)
1060                 snd_ctl_remove(card, p->qsound_space);
1061         up_write(&card->controls_rwsem);
1062
1063         /* cancel pending transfer of QSound parameters */
1064         spin_lock_irqsave (&p->q_lock, flags);
1065         p->qpos_changed = 0;
1066         spin_unlock_irqrestore (&p->q_lock, flags);
1067 }
1068
1069 /*
1070  * Transfer qsound parameters to CSP,
1071  * function should be called from interrupt routine
1072  */
1073 static int snd_sb_csp_qsound_transfer(struct snd_sb_csp * p)
1074 {
1075         int err = -ENXIO;
1076
1077         spin_lock(&p->q_lock);
1078         if (p->running & SNDRV_SB_CSP_ST_QSOUND) {
1079                 set_codec_parameter(p->chip, 0xe0, 0x01);
1080                 /* left channel */
1081                 set_codec_parameter(p->chip, 0x00, p->qpos_left);
1082                 set_codec_parameter(p->chip, 0x02, 0x00);
1083                 /* right channel */
1084                 set_codec_parameter(p->chip, 0x00, p->qpos_right);
1085                 set_codec_parameter(p->chip, 0x03, 0x00);
1086                 err = 0;
1087         }
1088         p->qpos_changed = 0;
1089         spin_unlock(&p->q_lock);
1090         return err;
1091 }
1092
1093 /* ------------------------------ */
1094
1095 /*
1096  * proc interface
1097  */
1098 static int init_proc_entry(struct snd_sb_csp * p, int device)
1099 {
1100         char name[16];
1101         struct snd_info_entry *entry;
1102         sprintf(name, "cspD%d", device);
1103         if (! snd_card_proc_new(p->chip->card, name, &entry))
1104                 snd_info_set_text_ops(entry, p, 1024, info_read);
1105         return 0;
1106 }
1107
1108 static void info_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
1109 {
1110         struct snd_sb_csp *p = entry->private_data;
1111
1112         snd_iprintf(buffer, "Creative Signal Processor [v%d.%d]\n", (p->version >> 4), (p->version & 0x0f));
1113         snd_iprintf(buffer, "State: %cx%c%c%c\n", ((p->running & SNDRV_SB_CSP_ST_QSOUND) ? 'Q' : '-'),
1114                     ((p->running & SNDRV_SB_CSP_ST_PAUSED) ? 'P' : '-'),
1115                     ((p->running & SNDRV_SB_CSP_ST_RUNNING) ? 'R' : '-'),
1116                     ((p->running & SNDRV_SB_CSP_ST_LOADED) ? 'L' : '-'));
1117         if (p->running & SNDRV_SB_CSP_ST_LOADED) {
1118                 snd_iprintf(buffer, "Codec: %s [func #%d]\n", p->codec_name, p->func_nr);
1119                 snd_iprintf(buffer, "Sample rates: ");
1120                 if (p->acc_rates == SNDRV_SB_CSP_RATE_ALL) {
1121                         snd_iprintf(buffer, "All\n");
1122                 } else {
1123                         snd_iprintf(buffer, "%s%s%s%s\n",
1124                                     ((p->acc_rates & SNDRV_SB_CSP_RATE_8000) ? "8000Hz " : ""),
1125                                     ((p->acc_rates & SNDRV_SB_CSP_RATE_11025) ? "11025Hz " : ""),
1126                                     ((p->acc_rates & SNDRV_SB_CSP_RATE_22050) ? "22050Hz " : ""),
1127                                     ((p->acc_rates & SNDRV_SB_CSP_RATE_44100) ? "44100Hz" : ""));
1128                 }
1129                 if (p->mode == SNDRV_SB_CSP_MODE_QSOUND) {
1130                         snd_iprintf(buffer, "QSound decoder %sabled\n",
1131                                     p->q_enabled ? "en" : "dis");
1132                 } else {
1133                         snd_iprintf(buffer, "PCM format ID: 0x%x (%s/%s) [%s/%s] [%s/%s]\n",
1134                                     p->acc_format,
1135                                     ((p->acc_width & SNDRV_SB_CSP_SAMPLE_16BIT) ? "16bit" : "-"),
1136                                     ((p->acc_width & SNDRV_SB_CSP_SAMPLE_8BIT) ? "8bit" : "-"),
1137                                     ((p->acc_channels & SNDRV_SB_CSP_MONO) ? "mono" : "-"),
1138                                     ((p->acc_channels & SNDRV_SB_CSP_STEREO) ? "stereo" : "-"),
1139                                     ((p->mode & SNDRV_SB_CSP_MODE_DSP_WRITE) ? "playback" : "-"),
1140                                     ((p->mode & SNDRV_SB_CSP_MODE_DSP_READ) ? "capture" : "-"));
1141                 }
1142         }
1143         if (p->running & SNDRV_SB_CSP_ST_AUTO) {
1144                 snd_iprintf(buffer, "Autoloaded Mu-Law, A-Law or Ima-ADPCM hardware codec\n");
1145         }
1146         if (p->running & SNDRV_SB_CSP_ST_RUNNING) {
1147                 snd_iprintf(buffer, "Processing %dbit %s PCM samples\n",
1148                             ((p->run_width & SNDRV_SB_CSP_SAMPLE_16BIT) ? 16 : 8),
1149                             ((p->run_channels & SNDRV_SB_CSP_MONO) ? "mono" : "stereo"));
1150         }
1151         if (p->running & SNDRV_SB_CSP_ST_QSOUND) {
1152                 snd_iprintf(buffer, "Qsound position: left = 0x%x, right = 0x%x\n",
1153                             p->qpos_left, p->qpos_right);
1154         }
1155 }
1156
1157 /* */
1158
1159 EXPORT_SYMBOL(snd_sb_csp_new);
1160
1161 /*
1162  * INIT part
1163  */
1164
1165 static int __init alsa_sb_csp_init(void)
1166 {
1167         return 0;
1168 }
1169
1170 static void __exit alsa_sb_csp_exit(void)
1171 {
1172 }
1173
1174 module_init(alsa_sb_csp_init)
1175 module_exit(alsa_sb_csp_exit)