[PATCH] sb16_csp: remove home-grown le??_to_cpu macros
[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 typedef struct riff_header {
58         __u32 name;
59         __u32 len;
60 } riff_header_t;
61
62 typedef struct desc_header {
63         riff_header_t 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 } desc_header_t;
71
72 /*
73  * prototypes
74  */
75 static void snd_sb_csp_free(snd_hwdep_t *hw);
76 static int snd_sb_csp_open(snd_hwdep_t * hw, struct file *file);
77 static int snd_sb_csp_ioctl(snd_hwdep_t * hw, struct file *file, unsigned int cmd, unsigned long arg);
78 static int snd_sb_csp_release(snd_hwdep_t * hw, struct file *file);
79
80 static int csp_detect(sb_t *chip, int *version);
81 static int set_codec_parameter(sb_t *chip, unsigned char par, unsigned char val);
82 static int set_register(sb_t *chip, unsigned char reg, unsigned char val);
83 static int read_register(sb_t *chip, unsigned char reg);
84 static int set_mode_register(sb_t *chip, unsigned char mode);
85 static int get_version(sb_t *chip);
86
87 static int snd_sb_csp_riff_load(snd_sb_csp_t * p, snd_sb_csp_microcode_t __user * code);
88 static int snd_sb_csp_unload(snd_sb_csp_t * p);
89 static int snd_sb_csp_load_user(snd_sb_csp_t * p, const unsigned char __user *buf, int size, int load_flags);
90 static int snd_sb_csp_autoload(snd_sb_csp_t * p, int pcm_sfmt, int play_rec_mode);
91 static int snd_sb_csp_check_version(snd_sb_csp_t * p);
92
93 static int snd_sb_csp_use(snd_sb_csp_t * p);
94 static int snd_sb_csp_unuse(snd_sb_csp_t * p);
95 static int snd_sb_csp_start(snd_sb_csp_t * p, int sample_width, int channels);
96 static int snd_sb_csp_stop(snd_sb_csp_t * p);
97 static int snd_sb_csp_pause(snd_sb_csp_t * p);
98 static int snd_sb_csp_restart(snd_sb_csp_t * p);
99
100 static int snd_sb_qsound_build(snd_sb_csp_t * p);
101 static void snd_sb_qsound_destroy(snd_sb_csp_t * p);
102 static int snd_sb_csp_qsound_transfer(snd_sb_csp_t * p);
103
104 static int init_proc_entry(snd_sb_csp_t * p, int device);
105 static void info_read(snd_info_entry_t *entry, snd_info_buffer_t * buffer);
106
107 /*
108  * Detect CSP chip and create a new instance
109  */
110 int snd_sb_csp_new(sb_t *chip, int device, snd_hwdep_t ** rhwdep)
111 {
112         snd_sb_csp_t *p;
113         int version, err;
114         snd_hwdep_t *hw;
115
116         if (rhwdep)
117                 *rhwdep = NULL;
118
119         if (csp_detect(chip, &version))
120                 return -ENODEV;
121
122         if ((err = snd_hwdep_new(chip->card, "SB16-CSP", device, &hw)) < 0)
123                 return err;
124
125         if ((p = kcalloc(1, sizeof(*p), GFP_KERNEL)) == NULL) {
126                 snd_device_free(chip->card, hw);
127                 return -ENOMEM;
128         }
129         p->chip = chip;
130         p->version = version;
131
132         /* CSP operators */
133         p->ops.csp_use = snd_sb_csp_use;
134         p->ops.csp_unuse = snd_sb_csp_unuse;
135         p->ops.csp_autoload = snd_sb_csp_autoload;
136         p->ops.csp_start = snd_sb_csp_start;
137         p->ops.csp_stop = snd_sb_csp_stop;
138         p->ops.csp_qsound_transfer = snd_sb_csp_qsound_transfer;
139
140         init_MUTEX(&p->access_mutex);
141         sprintf(hw->name, "CSP v%d.%d", (version >> 4), (version & 0x0f));
142         hw->iface = SNDRV_HWDEP_IFACE_SB16CSP;
143         hw->private_data = p;
144         hw->private_free = snd_sb_csp_free;
145
146         /* operators - only write/ioctl */
147         hw->ops.open = snd_sb_csp_open;
148         hw->ops.ioctl = snd_sb_csp_ioctl;
149         hw->ops.release = snd_sb_csp_release;
150
151         /* create a proc entry */
152         init_proc_entry(p, device);
153         if (rhwdep)
154                 *rhwdep = hw;
155         return 0;
156 }
157
158 /*
159  * free_private for hwdep instance
160  */
161 static void snd_sb_csp_free(snd_hwdep_t *hwdep)
162 {
163         snd_sb_csp_t *p = hwdep->private_data;
164         if (p) {
165                 if (p->running & SNDRV_SB_CSP_ST_RUNNING)
166                         snd_sb_csp_stop(p);
167                 kfree(p);
168         }
169 }
170
171 /* ------------------------------ */
172
173 /*
174  * open the device exclusively
175  */
176 static int snd_sb_csp_open(snd_hwdep_t * hw, struct file *file)
177 {
178         snd_sb_csp_t *p = hw->private_data;
179         return (snd_sb_csp_use(p));
180 }
181
182 /*
183  * ioctl for hwdep device:
184  */
185 static int snd_sb_csp_ioctl(snd_hwdep_t * hw, struct file *file, unsigned int cmd, unsigned long arg)
186 {
187         snd_sb_csp_t *p = hw->private_data;
188         snd_sb_csp_info_t info;
189         snd_sb_csp_start_t start_info;
190         int err;
191
192         snd_assert(p != NULL, return -EINVAL);
193
194         if (snd_sb_csp_check_version(p))
195                 return -ENODEV;
196
197         switch (cmd) {
198                 /* get information */
199         case SNDRV_SB_CSP_IOCTL_INFO:
200                 *info.codec_name = *p->codec_name;
201                 info.func_nr = p->func_nr;
202                 info.acc_format = p->acc_format;
203                 info.acc_channels = p->acc_channels;
204                 info.acc_width = p->acc_width;
205                 info.acc_rates = p->acc_rates;
206                 info.csp_mode = p->mode;
207                 info.run_channels = p->run_channels;
208                 info.run_width = p->run_width;
209                 info.version = p->version;
210                 info.state = p->running;
211                 if (copy_to_user((void __user *)arg, &info, sizeof(info)))
212                         err = -EFAULT;
213                 else
214                         err = 0;
215                 break;
216
217                 /* load CSP microcode */
218         case SNDRV_SB_CSP_IOCTL_LOAD_CODE:
219                 err = (p->running & SNDRV_SB_CSP_ST_RUNNING ?
220                        -EBUSY : snd_sb_csp_riff_load(p, (snd_sb_csp_microcode_t __user *) arg));
221                 break;
222         case SNDRV_SB_CSP_IOCTL_UNLOAD_CODE:
223                 err = (p->running & SNDRV_SB_CSP_ST_RUNNING ?
224                        -EBUSY : snd_sb_csp_unload(p));
225                 break;
226
227                 /* change CSP running state */
228         case SNDRV_SB_CSP_IOCTL_START:
229                 if (copy_from_user(&start_info, (void __user *) arg, sizeof(start_info)))
230                         err = -EFAULT;
231                 else
232                         err = snd_sb_csp_start(p, start_info.sample_width, start_info.channels);
233                 break;
234         case SNDRV_SB_CSP_IOCTL_STOP:
235                 err = snd_sb_csp_stop(p);
236                 break;
237         case SNDRV_SB_CSP_IOCTL_PAUSE:
238                 err = snd_sb_csp_pause(p);
239                 break;
240         case SNDRV_SB_CSP_IOCTL_RESTART:
241                 err = snd_sb_csp_restart(p);
242                 break;
243         default:
244                 err = -ENOTTY;
245                 break;
246         }
247
248         return err;
249 }
250
251 /*
252  * close the device
253  */
254 static int snd_sb_csp_release(snd_hwdep_t * hw, struct file *file)
255 {
256         snd_sb_csp_t *p = hw->private_data;
257         return (snd_sb_csp_unuse(p));
258 }
259
260 /* ------------------------------ */
261
262 /*
263  * acquire device
264  */
265 static int snd_sb_csp_use(snd_sb_csp_t * p)
266 {
267         down(&p->access_mutex);
268         if (p->used) {
269                 up(&p->access_mutex);
270                 return -EAGAIN;
271         }
272         p->used++;
273         up(&p->access_mutex);
274
275         return 0;
276
277 }
278
279 /*
280  * release device
281  */
282 static int snd_sb_csp_unuse(snd_sb_csp_t * p)
283 {
284         down(&p->access_mutex);
285         p->used--;
286         up(&p->access_mutex);
287
288         return 0;
289 }
290
291 /*
292  * load microcode via ioctl: 
293  * code is user-space pointer
294  */
295 static int snd_sb_csp_riff_load(snd_sb_csp_t * p, snd_sb_csp_microcode_t __user * mcode)
296 {
297         snd_sb_csp_mc_header_t info;
298
299         unsigned char __user *data_ptr;
300         unsigned char __user *data_end;
301         unsigned short func_nr = 0;
302
303         riff_header_t file_h, item_h, code_h;
304         __u32 item_type;
305         desc_header_t funcdesc_h;
306
307         unsigned long flags;
308         int err;
309
310         if (copy_from_user(&info, mcode, sizeof(info)))
311                 return -EFAULT;
312         data_ptr = mcode->data;
313
314         if (copy_from_user(&file_h, data_ptr, sizeof(file_h)))
315                 return -EFAULT;
316         if ((file_h.name != RIFF_HEADER) ||
317             (le32_to_cpu(file_h.len) >= SNDRV_SB_CSP_MAX_MICROCODE_FILE_SIZE - sizeof(file_h))) {
318                 snd_printd("%s: Invalid RIFF header\n", __FUNCTION__);
319                 return -EINVAL;
320         }
321         data_ptr += sizeof(file_h);
322         data_end = data_ptr + le32_to_cpu(file_h.len);
323
324         if (copy_from_user(&item_type, data_ptr, sizeof(item_type)))
325                 return -EFAULT;
326         if (item_type != CSP__HEADER) {
327                 snd_printd("%s: Invalid RIFF file type\n", __FUNCTION__);
328                 return -EINVAL;
329         }
330         data_ptr += sizeof (item_type);
331
332         for (; data_ptr < data_end; data_ptr += le32_to_cpu(item_h.len)) {
333                 if (copy_from_user(&item_h, data_ptr, sizeof(item_h)))
334                         return -EFAULT;
335                 data_ptr += sizeof(item_h);
336                 if (item_h.name != LIST_HEADER)
337                         continue;
338
339                 if (copy_from_user(&item_type, data_ptr, sizeof(item_type)))
340                          return -EFAULT;
341                 switch (item_type) {
342                 case FUNC_HEADER:
343                         if (copy_from_user(&funcdesc_h, data_ptr + sizeof(item_type), sizeof(funcdesc_h)))
344                                 return -EFAULT;
345                         func_nr = le16_to_cpu(funcdesc_h.func_nr);
346                         break;
347                 case CODE_HEADER:
348                         if (func_nr != info.func_req)
349                                 break;  /* not required function, try next */
350                         data_ptr += sizeof(item_type);
351
352                         /* destroy QSound mixer element */
353                         if (p->mode == SNDRV_SB_CSP_MODE_QSOUND) {
354                                 snd_sb_qsound_destroy(p);
355                         }
356                         /* Clear all flags */
357                         p->running = 0;
358                         p->mode = 0;
359
360                         /* load microcode blocks */
361                         for (;;) {
362                                 if (data_ptr >= data_end)
363                                         return -EINVAL;
364                                 if (copy_from_user(&code_h, data_ptr, sizeof(code_h)))
365                                         return -EFAULT;
366
367                                 /* init microcode blocks */
368                                 if (code_h.name != INIT_HEADER)
369                                         break;
370                                 data_ptr += sizeof(code_h);
371                                 err = snd_sb_csp_load_user(p, data_ptr, le32_to_cpu(code_h.len),
372                                                       SNDRV_SB_CSP_LOAD_INITBLOCK);
373                                 if (err)
374                                         return err;
375                                 data_ptr += le32_to_cpu(code_h.len);
376                         }
377                         /* main microcode block */
378                         if (copy_from_user(&code_h, data_ptr, sizeof(code_h)))
379                                 return -EFAULT;
380
381                         if (code_h.name != MAIN_HEADER) {
382                                 snd_printd("%s: Missing 'main' microcode\n", __FUNCTION__);
383                                 return -EINVAL;
384                         }
385                         data_ptr += sizeof(code_h);
386                         err = snd_sb_csp_load_user(p, data_ptr,
387                                                    le32_to_cpu(code_h.len), 0);
388                         if (err)
389                                 return err;
390
391                         /* fill in codec header */
392                         strlcpy(p->codec_name, info.codec_name, sizeof(p->codec_name));
393                         p->func_nr = func_nr;
394                         p->mode = le16_to_cpu(funcdesc_h.flags_play_rec);
395                         switch (le16_to_cpu(funcdesc_h.VOC_type)) {
396                         case 0x0001:    /* QSound decoder */
397                                 if (le16_to_cpu(funcdesc_h.flags_play_rec) == SNDRV_SB_CSP_MODE_DSP_WRITE) {
398                                         if (snd_sb_qsound_build(p) == 0)
399                                                 /* set QSound flag and clear all other mode flags */
400                                                 p->mode = SNDRV_SB_CSP_MODE_QSOUND;
401                                 }
402                                 p->acc_format = 0;
403                                 break;
404                         case 0x0006:    /* A Law codec */
405                                 p->acc_format = SNDRV_PCM_FMTBIT_A_LAW;
406                                 break;
407                         case 0x0007:    /* Mu Law codec */
408                                 p->acc_format = SNDRV_PCM_FMTBIT_MU_LAW;
409                                 break;
410                         case 0x0011:    /* what Creative thinks is IMA ADPCM codec */
411                         case 0x0200:    /* Creative ADPCM codec */
412                                 p->acc_format = SNDRV_PCM_FMTBIT_IMA_ADPCM;
413                                 break;
414                         case    201:    /* Text 2 Speech decoder */
415                                 /* TODO: Text2Speech handling routines */
416                                 p->acc_format = 0;
417                                 break;
418                         case 0x0202:    /* Fast Speech 8 codec */
419                         case 0x0203:    /* Fast Speech 10 codec */
420                                 p->acc_format = SNDRV_PCM_FMTBIT_SPECIAL;
421                                 break;
422                         default:        /* other codecs are unsupported */
423                                 p->acc_format = p->acc_width = p->acc_rates = 0;
424                                 p->mode = 0;
425                                 snd_printd("%s: Unsupported CSP codec type: 0x%04x\n",
426                                            __FUNCTION__,
427                                            le16_to_cpu(funcdesc_h.VOC_type));
428                                 return -EINVAL;
429                         }
430                         p->acc_channels = le16_to_cpu(funcdesc_h.flags_stereo_mono);
431                         p->acc_width = le16_to_cpu(funcdesc_h.flags_16bit_8bit);
432                         p->acc_rates = le16_to_cpu(funcdesc_h.flags_rates);
433
434                         /* Decouple CSP from IRQ and DMAREQ lines */
435                         spin_lock_irqsave(&p->chip->reg_lock, flags);
436                         set_mode_register(p->chip, 0xfc);
437                         set_mode_register(p->chip, 0x00);
438                         spin_unlock_irqrestore(&p->chip->reg_lock, flags);
439
440                         /* finished loading successfully */
441                         p->running = SNDRV_SB_CSP_ST_LOADED;    /* set LOADED flag */
442                         return 0;
443                 }
444         }
445         snd_printd("%s: Function #%d not found\n", __FUNCTION__, info.func_req);
446         return -EINVAL;
447 }
448
449 /*
450  * unload CSP microcode
451  */
452 static int snd_sb_csp_unload(snd_sb_csp_t * p)
453 {
454         if (p->running & SNDRV_SB_CSP_ST_RUNNING)
455                 return -EBUSY;
456         if (!(p->running & SNDRV_SB_CSP_ST_LOADED))
457                 return -ENXIO;
458
459         /* clear supported formats */
460         p->acc_format = 0;
461         p->acc_channels = p->acc_width = p->acc_rates = 0;
462         /* destroy QSound mixer element */
463         if (p->mode == SNDRV_SB_CSP_MODE_QSOUND) {
464                 snd_sb_qsound_destroy(p);
465         }
466         /* clear all flags */
467         p->running = 0;
468         p->mode = 0;
469         return 0;
470 }
471
472 /*
473  * send command sequence to DSP
474  */
475 static inline int command_seq(sb_t *chip, const unsigned char *seq, int size)
476 {
477         int i;
478         for (i = 0; i < size; i++) {
479                 if (!snd_sbdsp_command(chip, seq[i]))
480                         return -EIO;
481         }
482         return 0;
483 }
484
485 /*
486  * set CSP codec parameter
487  */
488 static int set_codec_parameter(sb_t *chip, unsigned char par, unsigned char val)
489 {
490         unsigned char dsp_cmd[3];
491
492         dsp_cmd[0] = 0x05;      /* CSP set codec parameter */
493         dsp_cmd[1] = val;       /* Parameter value */
494         dsp_cmd[2] = par;       /* Parameter */
495         command_seq(chip, dsp_cmd, 3);
496         snd_sbdsp_command(chip, 0x03);  /* DSP read? */
497         if (snd_sbdsp_get_byte(chip) != par)
498                 return -EIO;
499         return 0;
500 }
501
502 /*
503  * set CSP register
504  */
505 static int set_register(sb_t *chip, unsigned char reg, unsigned char val)
506 {
507         unsigned char dsp_cmd[3];
508
509         dsp_cmd[0] = 0x0e;      /* CSP set register */
510         dsp_cmd[1] = reg;       /* CSP Register */
511         dsp_cmd[2] = val;       /* value */
512         return command_seq(chip, dsp_cmd, 3);
513 }
514
515 /*
516  * read CSP register
517  * return < 0 -> error
518  */
519 static int read_register(sb_t *chip, unsigned char reg)
520 {
521         unsigned char dsp_cmd[2];
522
523         dsp_cmd[0] = 0x0f;      /* CSP read register */
524         dsp_cmd[1] = reg;       /* CSP Register */
525         command_seq(chip, dsp_cmd, 2);
526         return snd_sbdsp_get_byte(chip);        /* Read DSP value */
527 }
528
529 /*
530  * set CSP mode register
531  */
532 static int set_mode_register(sb_t *chip, unsigned char mode)
533 {
534         unsigned char dsp_cmd[2];
535
536         dsp_cmd[0] = 0x04;      /* CSP set mode register */
537         dsp_cmd[1] = mode;      /* mode */
538         return command_seq(chip, dsp_cmd, 2);
539 }
540
541 /*
542  * Detect CSP
543  * return 0 if CSP exists.
544  */
545 static int csp_detect(sb_t *chip, int *version)
546 {
547         unsigned char csp_test1, csp_test2;
548         unsigned long flags;
549         int result = -ENODEV;
550
551         spin_lock_irqsave(&chip->reg_lock, flags);
552
553         set_codec_parameter(chip, 0x00, 0x00);
554         set_mode_register(chip, 0xfc);          /* 0xfc = ?? */
555
556         csp_test1 = read_register(chip, 0x83);
557         set_register(chip, 0x83, ~csp_test1);
558         csp_test2 = read_register(chip, 0x83);
559         if (csp_test2 != (csp_test1 ^ 0xff))
560                 goto __fail;
561
562         set_register(chip, 0x83, csp_test1);
563         csp_test2 = read_register(chip, 0x83);
564         if (csp_test2 != csp_test1)
565                 goto __fail;
566
567         set_mode_register(chip, 0x00);          /* 0x00 = ? */
568
569         *version = get_version(chip);
570         snd_sbdsp_reset(chip);  /* reset DSP after getversion! */
571         if (*version >= 0x10 && *version <= 0x1f)
572                 result = 0;             /* valid version id */
573
574       __fail:
575         spin_unlock_irqrestore(&chip->reg_lock, flags);
576         return result;
577 }
578
579 /*
580  * get CSP version number
581  */
582 static int get_version(sb_t *chip)
583 {
584         unsigned char dsp_cmd[2];
585
586         dsp_cmd[0] = 0x08;      /* SB_DSP_!something! */
587         dsp_cmd[1] = 0x03;      /* get chip version id? */
588         command_seq(chip, dsp_cmd, 2);
589
590         return (snd_sbdsp_get_byte(chip));
591 }
592
593 /*
594  * check if the CSP version is valid
595  */
596 static int snd_sb_csp_check_version(snd_sb_csp_t * p)
597 {
598         if (p->version < 0x10 || p->version > 0x1f) {
599                 snd_printd("%s: Invalid CSP version: 0x%x\n", __FUNCTION__, p->version);
600                 return 1;
601         }
602         return 0;
603 }
604
605 /*
606  * download microcode to CSP (microcode should have one "main" block).
607  */
608 static int snd_sb_csp_load(snd_sb_csp_t * p, const unsigned char *buf, int size, int load_flags)
609 {
610         int status, i;
611         int err;
612         int result = -EIO;
613         unsigned long flags;
614
615         spin_lock_irqsave(&p->chip->reg_lock, flags);
616         snd_sbdsp_command(p->chip, 0x01);       /* CSP download command */
617         if (snd_sbdsp_get_byte(p->chip)) {
618                 snd_printd("%s: Download command failed\n", __FUNCTION__);
619                 goto __fail;
620         }
621         /* Send CSP low byte (size - 1) */
622         snd_sbdsp_command(p->chip, (unsigned char)(size - 1));
623         /* Send high byte */
624         snd_sbdsp_command(p->chip, (unsigned char)((size - 1) >> 8));
625         /* send microcode sequence */
626         /* load from kernel space */
627         while (size--) {
628                 if (!snd_sbdsp_command(p->chip, *buf++))
629                         goto __fail;
630         }
631         if (snd_sbdsp_get_byte(p->chip))
632                 goto __fail;
633
634         if (load_flags & SNDRV_SB_CSP_LOAD_INITBLOCK) {
635                 i = 0;
636                 /* some codecs (FastSpeech) take some time to initialize */
637                 while (1) {
638                         snd_sbdsp_command(p->chip, 0x03);
639                         status = snd_sbdsp_get_byte(p->chip);
640                         if (status == 0x55 || ++i >= 10)
641                                 break;
642                         udelay (10);
643                 }
644                 if (status != 0x55) {
645                         snd_printd("%s: Microcode initialization failed\n", __FUNCTION__);
646                         goto __fail;
647                 }
648         } else {
649                 /*
650                  * Read mixer register SB_DSP4_DMASETUP after loading 'main' code.
651                  * Start CSP chip if no 16bit DMA channel is set - some kind
652                  * of autorun or perhaps a bugfix?
653                  */
654                 spin_lock(&p->chip->mixer_lock);
655                 status = snd_sbmixer_read(p->chip, SB_DSP4_DMASETUP);
656                 spin_unlock(&p->chip->mixer_lock);
657                 if (!(status & (SB_DMASETUP_DMA7 | SB_DMASETUP_DMA6 | SB_DMASETUP_DMA5))) {
658                         err = (set_codec_parameter(p->chip, 0xaa, 0x00) ||
659                                set_codec_parameter(p->chip, 0xff, 0x00));
660                         snd_sbdsp_reset(p->chip);               /* really! */
661                         if (err)
662                                 goto __fail;
663                         set_mode_register(p->chip, 0xc0);       /* c0 = STOP */
664                         set_mode_register(p->chip, 0x70);       /* 70 = RUN */
665                 }
666         }
667         result = 0;
668
669       __fail:
670         spin_unlock_irqrestore(&p->chip->reg_lock, flags);
671         return result;
672 }
673  
674 static int snd_sb_csp_load_user(snd_sb_csp_t * p, const unsigned char __user *buf, int size, int load_flags)
675 {
676         int err = -ENOMEM;
677         unsigned char *kbuf = kmalloc(size, GFP_KERNEL);
678         if (kbuf) {
679                 if (copy_from_user(kbuf, buf, size))
680                         err = -EFAULT;
681                 else
682                         err = snd_sb_csp_load(p, kbuf, size, load_flags);
683                 kfree(kbuf);
684         }
685         return err;
686 }
687
688 #include "sb16_csp_codecs.h"
689
690 /*
691  * autoload hardware codec if necessary
692  * return 0 if CSP is loaded and ready to run (p->running != 0)
693  */
694 static int snd_sb_csp_autoload(snd_sb_csp_t * p, int pcm_sfmt, int play_rec_mode)
695 {
696         unsigned long flags;
697         int err = 0;
698
699         /* if CSP is running or manually loaded then exit */
700         if (p->running & (SNDRV_SB_CSP_ST_RUNNING | SNDRV_SB_CSP_ST_LOADED)) 
701                 return -EBUSY;
702
703         /* autoload microcode only if requested hardware codec is not already loaded */
704         if (((1 << pcm_sfmt) & p->acc_format) && (play_rec_mode & p->mode)) {
705                 p->running = SNDRV_SB_CSP_ST_AUTO;
706         } else {
707                 switch (pcm_sfmt) {
708                 case SNDRV_PCM_FORMAT_MU_LAW:
709                         err = snd_sb_csp_load(p, &mulaw_main[0], sizeof(mulaw_main), 0);
710                         p->acc_format = SNDRV_PCM_FMTBIT_MU_LAW;
711                         p->mode = SNDRV_SB_CSP_MODE_DSP_READ | SNDRV_SB_CSP_MODE_DSP_WRITE;
712                         break;
713                 case SNDRV_PCM_FORMAT_A_LAW:
714                         err = snd_sb_csp_load(p, &alaw_main[0], sizeof(alaw_main), 0);
715                         p->acc_format = SNDRV_PCM_FMTBIT_A_LAW;
716                         p->mode = SNDRV_SB_CSP_MODE_DSP_READ | SNDRV_SB_CSP_MODE_DSP_WRITE;
717                         break;
718                 case SNDRV_PCM_FORMAT_IMA_ADPCM:
719                         err = snd_sb_csp_load(p, &ima_adpcm_init[0], sizeof(ima_adpcm_init),
720                                               SNDRV_SB_CSP_LOAD_INITBLOCK);
721                         if (err)
722                                 break;
723                         if (play_rec_mode == SNDRV_SB_CSP_MODE_DSP_WRITE) {
724                                 err = snd_sb_csp_load(p, &ima_adpcm_playback[0],
725                                                       sizeof(ima_adpcm_playback), 0);
726                                 p->mode = SNDRV_SB_CSP_MODE_DSP_WRITE;
727                         } else {
728                                 err = snd_sb_csp_load(p, &ima_adpcm_capture[0],
729                                                       sizeof(ima_adpcm_capture), 0);
730                                 p->mode = SNDRV_SB_CSP_MODE_DSP_READ;
731                         }
732                         p->acc_format = SNDRV_PCM_FMTBIT_IMA_ADPCM;
733                         break;                            
734                 default:
735                         /* Decouple CSP from IRQ and DMAREQ lines */
736                         if (p->running & SNDRV_SB_CSP_ST_AUTO) {
737                                 spin_lock_irqsave(&p->chip->reg_lock, flags);
738                                 set_mode_register(p->chip, 0xfc);
739                                 set_mode_register(p->chip, 0x00);
740                                 spin_unlock_irqrestore(&p->chip->reg_lock, flags);
741                                 p->running = 0;                 /* clear autoloaded flag */
742                         }
743                         return -EINVAL;
744                 }
745                 if (err) {
746                         p->acc_format = 0;
747                         p->acc_channels = p->acc_width = p->acc_rates = 0;
748
749                         p->running = 0;                         /* clear autoloaded flag */
750                         p->mode = 0;
751                         return (err);
752                 } else {
753                         p->running = SNDRV_SB_CSP_ST_AUTO;      /* set autoloaded flag */
754                         p->acc_width = SNDRV_SB_CSP_SAMPLE_16BIT;       /* only 16 bit data */
755                         p->acc_channels = SNDRV_SB_CSP_MONO | SNDRV_SB_CSP_STEREO;
756                         p->acc_rates = SNDRV_SB_CSP_RATE_ALL;   /* HW codecs accept all rates */
757                 }   
758
759         }
760         return (p->running & SNDRV_SB_CSP_ST_AUTO) ? 0 : -ENXIO;
761 }
762
763 /*
764  * start CSP
765  */
766 static int snd_sb_csp_start(snd_sb_csp_t * p, int sample_width, int channels)
767 {
768         unsigned char s_type;   /* sample type */
769         unsigned char mixL, mixR;
770         int result = -EIO;
771         unsigned long flags;
772
773         if (!(p->running & (SNDRV_SB_CSP_ST_LOADED | SNDRV_SB_CSP_ST_AUTO))) {
774                 snd_printd("%s: Microcode not loaded\n", __FUNCTION__);
775                 return -ENXIO;
776         }
777         if (p->running & SNDRV_SB_CSP_ST_RUNNING) {
778                 snd_printd("%s: CSP already running\n", __FUNCTION__);
779                 return -EBUSY;
780         }
781         if (!(sample_width & p->acc_width)) {
782                 snd_printd("%s: Unsupported PCM sample width\n", __FUNCTION__);
783                 return -EINVAL;
784         }
785         if (!(channels & p->acc_channels)) {
786                 snd_printd("%s: Invalid number of channels\n", __FUNCTION__);
787                 return -EINVAL;
788         }
789
790         /* Mute PCM volume */
791         spin_lock_irqsave(&p->chip->mixer_lock, flags);
792         mixL = snd_sbmixer_read(p->chip, SB_DSP4_PCM_DEV);
793         mixR = snd_sbmixer_read(p->chip, SB_DSP4_PCM_DEV + 1);
794         snd_sbmixer_write(p->chip, SB_DSP4_PCM_DEV, mixL & 0x7);
795         snd_sbmixer_write(p->chip, SB_DSP4_PCM_DEV + 1, mixR & 0x7);
796
797         spin_lock(&p->chip->reg_lock);
798         set_mode_register(p->chip, 0xc0);       /* c0 = STOP */
799         set_mode_register(p->chip, 0x70);       /* 70 = RUN */
800
801         s_type = 0x00;
802         if (channels == SNDRV_SB_CSP_MONO)
803                 s_type = 0x11;  /* 000n 000n    (n = 1 if mono) */
804         if (sample_width == SNDRV_SB_CSP_SAMPLE_8BIT)
805                 s_type |= 0x22; /* 00dX 00dX    (d = 1 if 8 bit samples) */
806
807         if (set_codec_parameter(p->chip, 0x81, s_type)) {
808                 snd_printd("%s: Set sample type command failed\n", __FUNCTION__);
809                 goto __fail;
810         }
811         if (set_codec_parameter(p->chip, 0x80, 0x00)) {
812                 snd_printd("%s: Codec start command failed\n", __FUNCTION__);
813                 goto __fail;
814         }
815         p->run_width = sample_width;
816         p->run_channels = channels;
817
818         p->running |= SNDRV_SB_CSP_ST_RUNNING;
819
820         if (p->mode & SNDRV_SB_CSP_MODE_QSOUND) {
821                 set_codec_parameter(p->chip, 0xe0, 0x01);
822                 /* enable QSound decoder */
823                 set_codec_parameter(p->chip, 0x00, 0xff);
824                 set_codec_parameter(p->chip, 0x01, 0xff);
825                 p->running |= SNDRV_SB_CSP_ST_QSOUND;
826                 /* set QSound startup value */
827                 snd_sb_csp_qsound_transfer(p);
828         }
829         result = 0;
830
831       __fail:
832         spin_unlock(&p->chip->reg_lock);
833
834         /* restore PCM volume */
835         snd_sbmixer_write(p->chip, SB_DSP4_PCM_DEV, mixL);
836         snd_sbmixer_write(p->chip, SB_DSP4_PCM_DEV + 1, mixR);
837         spin_unlock_irqrestore(&p->chip->mixer_lock, flags);
838
839         return result;
840 }
841
842 /*
843  * stop CSP
844  */
845 static int snd_sb_csp_stop(snd_sb_csp_t * p)
846 {
847         int result;
848         unsigned char mixL, mixR;
849         unsigned long flags;
850
851         if (!(p->running & SNDRV_SB_CSP_ST_RUNNING))
852                 return 0;
853
854         /* Mute PCM volume */
855         spin_lock_irqsave(&p->chip->mixer_lock, flags);
856         mixL = snd_sbmixer_read(p->chip, SB_DSP4_PCM_DEV);
857         mixR = snd_sbmixer_read(p->chip, SB_DSP4_PCM_DEV + 1);
858         snd_sbmixer_write(p->chip, SB_DSP4_PCM_DEV, mixL & 0x7);
859         snd_sbmixer_write(p->chip, SB_DSP4_PCM_DEV + 1, mixR & 0x7);
860
861         spin_lock(&p->chip->reg_lock);
862         if (p->running & SNDRV_SB_CSP_ST_QSOUND) {
863                 set_codec_parameter(p->chip, 0xe0, 0x01);
864                 /* disable QSound decoder */
865                 set_codec_parameter(p->chip, 0x00, 0x00);
866                 set_codec_parameter(p->chip, 0x01, 0x00);
867
868                 p->running &= ~SNDRV_SB_CSP_ST_QSOUND;
869         }
870         result = set_mode_register(p->chip, 0xc0);      /* c0 = STOP */
871         spin_unlock(&p->chip->reg_lock);
872
873         /* restore PCM volume */
874         snd_sbmixer_write(p->chip, SB_DSP4_PCM_DEV, mixL);
875         snd_sbmixer_write(p->chip, SB_DSP4_PCM_DEV + 1, mixR);
876         spin_unlock_irqrestore(&p->chip->mixer_lock, flags);
877
878         if (!(result))
879                 p->running &= ~(SNDRV_SB_CSP_ST_PAUSED | SNDRV_SB_CSP_ST_RUNNING);
880         return result;
881 }
882
883 /*
884  * pause CSP codec and hold DMA transfer
885  */
886 static int snd_sb_csp_pause(snd_sb_csp_t * p)
887 {
888         int result;
889         unsigned long flags;
890
891         if (!(p->running & SNDRV_SB_CSP_ST_RUNNING))
892                 return -EBUSY;
893
894         spin_lock_irqsave(&p->chip->reg_lock, flags);
895         result = set_codec_parameter(p->chip, 0x80, 0xff);
896         spin_unlock_irqrestore(&p->chip->reg_lock, flags);
897         if (!(result))
898                 p->running |= SNDRV_SB_CSP_ST_PAUSED;
899
900         return result;
901 }
902
903 /*
904  * restart CSP codec and resume DMA transfer
905  */
906 static int snd_sb_csp_restart(snd_sb_csp_t * p)
907 {
908         int result;
909         unsigned long flags;
910
911         if (!(p->running & SNDRV_SB_CSP_ST_PAUSED))
912                 return -EBUSY;
913
914         spin_lock_irqsave(&p->chip->reg_lock, flags);
915         result = set_codec_parameter(p->chip, 0x80, 0x00);
916         spin_unlock_irqrestore(&p->chip->reg_lock, flags);
917         if (!(result))
918                 p->running &= ~SNDRV_SB_CSP_ST_PAUSED;
919
920         return result;
921 }
922
923 /* ------------------------------ */
924
925 /*
926  * QSound mixer control for PCM
927  */
928
929 static int snd_sb_qsound_switch_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
930 {
931         uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
932         uinfo->count = 1;
933         uinfo->value.integer.min = 0;
934         uinfo->value.integer.max = 1;
935         return 0;
936 }
937
938 static int snd_sb_qsound_switch_get(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
939 {
940         snd_sb_csp_t *p = snd_kcontrol_chip(kcontrol);
941         
942         ucontrol->value.integer.value[0] = p->q_enabled ? 1 : 0;
943         return 0;
944 }
945
946 static int snd_sb_qsound_switch_put(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
947 {
948         snd_sb_csp_t *p = snd_kcontrol_chip(kcontrol);
949         unsigned long flags;
950         int change;
951         unsigned char nval;
952         
953         nval = ucontrol->value.integer.value[0] & 0x01;
954         spin_lock_irqsave(&p->q_lock, flags);
955         change = p->q_enabled != nval;
956         p->q_enabled = nval;
957         spin_unlock_irqrestore(&p->q_lock, flags);
958         return change;
959 }
960
961 static int snd_sb_qsound_space_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
962 {
963         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
964         uinfo->count = 2;
965         uinfo->value.integer.min = 0;
966         uinfo->value.integer.max = SNDRV_SB_CSP_QSOUND_MAX_RIGHT;
967         return 0;
968 }
969
970 static int snd_sb_qsound_space_get(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
971 {
972         snd_sb_csp_t *p = snd_kcontrol_chip(kcontrol);
973         unsigned long flags;
974         
975         spin_lock_irqsave(&p->q_lock, flags);
976         ucontrol->value.integer.value[0] = p->qpos_left;
977         ucontrol->value.integer.value[1] = p->qpos_right;
978         spin_unlock_irqrestore(&p->q_lock, flags);
979         return 0;
980 }
981
982 static int snd_sb_qsound_space_put(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
983 {
984         snd_sb_csp_t *p = snd_kcontrol_chip(kcontrol);
985         unsigned long flags;
986         int change;
987         unsigned char nval1, nval2;
988         
989         nval1 = ucontrol->value.integer.value[0];
990         if (nval1 > SNDRV_SB_CSP_QSOUND_MAX_RIGHT)
991                 nval1 = SNDRV_SB_CSP_QSOUND_MAX_RIGHT;
992         nval2 = ucontrol->value.integer.value[1];
993         if (nval2 > SNDRV_SB_CSP_QSOUND_MAX_RIGHT)
994                 nval2 = SNDRV_SB_CSP_QSOUND_MAX_RIGHT;
995         spin_lock_irqsave(&p->q_lock, flags);
996         change = p->qpos_left != nval1 || p->qpos_right != nval2;
997         p->qpos_left = nval1;
998         p->qpos_right = nval2;
999         p->qpos_changed = change;
1000         spin_unlock_irqrestore(&p->q_lock, flags);
1001         return change;
1002 }
1003
1004 static snd_kcontrol_new_t snd_sb_qsound_switch = {
1005         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1006         .name = "3D Control - Switch",
1007         .info = snd_sb_qsound_switch_info,
1008         .get = snd_sb_qsound_switch_get,
1009         .put = snd_sb_qsound_switch_put
1010 };
1011
1012 static snd_kcontrol_new_t snd_sb_qsound_space = {
1013         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1014         .name = "3D Control - Space",
1015         .info = snd_sb_qsound_space_info,
1016         .get = snd_sb_qsound_space_get,
1017         .put = snd_sb_qsound_space_put
1018 };
1019
1020 static int snd_sb_qsound_build(snd_sb_csp_t * p)
1021 {
1022         snd_card_t * card;
1023         int err;
1024
1025         snd_assert(p != NULL, return -EINVAL);
1026
1027         card = p->chip->card;
1028         p->qpos_left = p->qpos_right = SNDRV_SB_CSP_QSOUND_MAX_RIGHT / 2;
1029         p->qpos_changed = 0;
1030
1031         spin_lock_init(&p->q_lock);
1032
1033         if ((err = snd_ctl_add(card, p->qsound_switch = snd_ctl_new1(&snd_sb_qsound_switch, p))) < 0)
1034                 goto __error;
1035         if ((err = snd_ctl_add(card, p->qsound_space = snd_ctl_new1(&snd_sb_qsound_space, p))) < 0)
1036                 goto __error;
1037
1038         return 0;
1039
1040      __error:
1041         snd_sb_qsound_destroy(p);
1042         return err;
1043 }
1044
1045 static void snd_sb_qsound_destroy(snd_sb_csp_t * p)
1046 {
1047         snd_card_t * card;
1048         unsigned long flags;
1049
1050         snd_assert(p != NULL, return);
1051
1052         card = p->chip->card;   
1053         
1054         down_write(&card->controls_rwsem);
1055         if (p->qsound_switch)
1056                 snd_ctl_remove(card, p->qsound_switch);
1057         if (p->qsound_space)
1058                 snd_ctl_remove(card, p->qsound_space);
1059         up_write(&card->controls_rwsem);
1060
1061         /* cancel pending transfer of QSound parameters */
1062         spin_lock_irqsave (&p->q_lock, flags);
1063         p->qpos_changed = 0;
1064         spin_unlock_irqrestore (&p->q_lock, flags);
1065 }
1066
1067 /*
1068  * Transfer qsound parameters to CSP,
1069  * function should be called from interrupt routine
1070  */
1071 static int snd_sb_csp_qsound_transfer(snd_sb_csp_t * p)
1072 {
1073         int err = -ENXIO;
1074
1075         spin_lock(&p->q_lock);
1076         if (p->running & SNDRV_SB_CSP_ST_QSOUND) {
1077                 set_codec_parameter(p->chip, 0xe0, 0x01);
1078                 /* left channel */
1079                 set_codec_parameter(p->chip, 0x00, p->qpos_left);
1080                 set_codec_parameter(p->chip, 0x02, 0x00);
1081                 /* right channel */
1082                 set_codec_parameter(p->chip, 0x00, p->qpos_right);
1083                 set_codec_parameter(p->chip, 0x03, 0x00);
1084                 err = 0;
1085         }
1086         p->qpos_changed = 0;
1087         spin_unlock(&p->q_lock);
1088         return err;
1089 }
1090
1091 /* ------------------------------ */
1092
1093 /*
1094  * proc interface
1095  */
1096 static int init_proc_entry(snd_sb_csp_t * p, int device)
1097 {
1098         char name[16];
1099         snd_info_entry_t *entry;
1100         sprintf(name, "cspD%d", device);
1101         if (! snd_card_proc_new(p->chip->card, name, &entry))
1102                 snd_info_set_text_ops(entry, p, 1024, info_read);
1103         return 0;
1104 }
1105
1106 static void info_read(snd_info_entry_t *entry, snd_info_buffer_t * buffer)
1107 {
1108         snd_sb_csp_t *p = entry->private_data;
1109
1110         snd_iprintf(buffer, "Creative Signal Processor [v%d.%d]\n", (p->version >> 4), (p->version & 0x0f));
1111         snd_iprintf(buffer, "State: %cx%c%c%c\n", ((p->running & SNDRV_SB_CSP_ST_QSOUND) ? 'Q' : '-'),
1112                     ((p->running & SNDRV_SB_CSP_ST_PAUSED) ? 'P' : '-'),
1113                     ((p->running & SNDRV_SB_CSP_ST_RUNNING) ? 'R' : '-'),
1114                     ((p->running & SNDRV_SB_CSP_ST_LOADED) ? 'L' : '-'));
1115         if (p->running & SNDRV_SB_CSP_ST_LOADED) {
1116                 snd_iprintf(buffer, "Codec: %s [func #%d]\n", p->codec_name, p->func_nr);
1117                 snd_iprintf(buffer, "Sample rates: ");
1118                 if (p->acc_rates == SNDRV_SB_CSP_RATE_ALL) {
1119                         snd_iprintf(buffer, "All\n");
1120                 } else {
1121                         snd_iprintf(buffer, "%s%s%s%s\n",
1122                                     ((p->acc_rates & SNDRV_SB_CSP_RATE_8000) ? "8000Hz " : ""),
1123                                     ((p->acc_rates & SNDRV_SB_CSP_RATE_11025) ? "11025Hz " : ""),
1124                                     ((p->acc_rates & SNDRV_SB_CSP_RATE_22050) ? "22050Hz " : ""),
1125                                     ((p->acc_rates & SNDRV_SB_CSP_RATE_44100) ? "44100Hz" : ""));
1126                 }
1127                 if (p->mode == SNDRV_SB_CSP_MODE_QSOUND) {
1128                         snd_iprintf(buffer, "QSound decoder %sabled\n",
1129                                     p->q_enabled ? "en" : "dis");
1130                 } else {
1131                         snd_iprintf(buffer, "PCM format ID: 0x%x (%s/%s) [%s/%s] [%s/%s]\n",
1132                                     p->acc_format,
1133                                     ((p->acc_width & SNDRV_SB_CSP_SAMPLE_16BIT) ? "16bit" : "-"),
1134                                     ((p->acc_width & SNDRV_SB_CSP_SAMPLE_8BIT) ? "8bit" : "-"),
1135                                     ((p->acc_channels & SNDRV_SB_CSP_MONO) ? "mono" : "-"),
1136                                     ((p->acc_channels & SNDRV_SB_CSP_STEREO) ? "stereo" : "-"),
1137                                     ((p->mode & SNDRV_SB_CSP_MODE_DSP_WRITE) ? "playback" : "-"),
1138                                     ((p->mode & SNDRV_SB_CSP_MODE_DSP_READ) ? "capture" : "-"));
1139                 }
1140         }
1141         if (p->running & SNDRV_SB_CSP_ST_AUTO) {
1142                 snd_iprintf(buffer, "Autoloaded Mu-Law, A-Law or Ima-ADPCM hardware codec\n");
1143         }
1144         if (p->running & SNDRV_SB_CSP_ST_RUNNING) {
1145                 snd_iprintf(buffer, "Processing %dbit %s PCM samples\n",
1146                             ((p->run_width & SNDRV_SB_CSP_SAMPLE_16BIT) ? 16 : 8),
1147                             ((p->run_channels & SNDRV_SB_CSP_MONO) ? "mono" : "stereo"));
1148         }
1149         if (p->running & SNDRV_SB_CSP_ST_QSOUND) {
1150                 snd_iprintf(buffer, "Qsound position: left = 0x%x, right = 0x%x\n",
1151                             p->qpos_left, p->qpos_right);
1152         }
1153 }
1154
1155 /* */
1156
1157 EXPORT_SYMBOL(snd_sb_csp_new);
1158
1159 /*
1160  * INIT part
1161  */
1162
1163 static int __init alsa_sb_csp_init(void)
1164 {
1165         return 0;
1166 }
1167
1168 static void __exit alsa_sb_csp_exit(void)
1169 {
1170 }
1171
1172 module_init(alsa_sb_csp_init)
1173 module_exit(alsa_sb_csp_exit)