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1da177e4 LT |
1 | /* |
2 | * linux/sound/oss/dmasound/dmasound_core.c | |
3 | * | |
4 | * | |
5 | * OSS/Free compatible Atari TT/Falcon and Amiga DMA sound driver for | |
6 | * Linux/m68k | |
7 | * Extended to support Power Macintosh for Linux/ppc by Paul Mackerras | |
8 | * | |
9 | * (c) 1995 by Michael Schlueter & Michael Marte | |
10 | * | |
11 | * Michael Schlueter (michael@duck.syd.de) did the basic structure of the VFS | |
12 | * interface and the u-law to signed byte conversion. | |
13 | * | |
14 | * Michael Marte (marte@informatik.uni-muenchen.de) did the sound queue, | |
15 | * /dev/mixer, /dev/sndstat and complemented the VFS interface. He would like | |
16 | * to thank: | |
17 | * - Michael Schlueter for initial ideas and documentation on the MFP and | |
18 | * the DMA sound hardware. | |
19 | * - Therapy? for their CD 'Troublegum' which really made me rock. | |
20 | * | |
21 | * /dev/sndstat is based on code by Hannu Savolainen, the author of the | |
22 | * VoxWare family of drivers. | |
23 | * | |
24 | * This file is subject to the terms and conditions of the GNU General Public | |
25 | * License. See the file COPYING in the main directory of this archive | |
26 | * for more details. | |
27 | * | |
28 | * History: | |
29 | * | |
30 | * 1995/8/25 First release | |
31 | * | |
32 | * 1995/9/02 Roman Hodek: | |
33 | * - Fixed atari_stram_alloc() call, the timer | |
34 | * programming and several race conditions | |
35 | * 1995/9/14 Roman Hodek: | |
36 | * - After some discussion with Michael Schlueter, | |
37 | * revised the interrupt disabling | |
38 | * - Slightly speeded up U8->S8 translation by using | |
39 | * long operations where possible | |
40 | * - Added 4:3 interpolation for /dev/audio | |
41 | * | |
42 | * 1995/9/20 Torsten Scherer: | |
43 | * - Fixed a bug in sq_write and changed /dev/audio | |
44 | * converting to play at 12517Hz instead of 6258Hz. | |
45 | * | |
46 | * 1995/9/23 Torsten Scherer: | |
47 | * - Changed sq_interrupt() and sq_play() to pre-program | |
48 | * the DMA for another frame while there's still one | |
49 | * running. This allows the IRQ response to be | |
50 | * arbitrarily delayed and playing will still continue. | |
51 | * | |
52 | * 1995/10/14 Guenther Kelleter, Torsten Scherer: | |
53 | * - Better support for Falcon audio (the Falcon doesn't | |
54 | * raise an IRQ at the end of a frame, but at the | |
55 | * beginning instead!). uses 'if (codec_dma)' in lots | |
56 | * of places to simply switch between Falcon and TT | |
57 | * code. | |
58 | * | |
59 | * 1995/11/06 Torsten Scherer: | |
60 | * - Started introducing a hardware abstraction scheme | |
61 | * (may perhaps also serve for Amigas?) | |
62 | * - Can now play samples at almost all frequencies by | |
63 | * means of a more generalized expand routine | |
64 | * - Takes a good deal of care to cut data only at | |
65 | * sample sizes | |
66 | * - Buffer size is now a kernel runtime option | |
67 | * - Implemented fsync() & several minor improvements | |
68 | * Guenther Kelleter: | |
69 | * - Useful hints and bug fixes | |
70 | * - Cross-checked it for Falcons | |
71 | * | |
72 | * 1996/3/9 Geert Uytterhoeven: | |
73 | * - Support added for Amiga, A-law, 16-bit little | |
74 | * endian. | |
75 | * - Unification to drivers/sound/dmasound.c. | |
76 | * | |
77 | * 1996/4/6 Martin Mitchell: | |
78 | * - Updated to 1.3 kernel. | |
79 | * | |
80 | * 1996/6/13 Topi Kanerva: | |
81 | * - Fixed things that were broken (mainly the amiga | |
82 | * 14-bit routines) | |
83 | * - /dev/sndstat shows now the real hardware frequency | |
84 | * - The lowpass filter is disabled by default now | |
85 | * | |
86 | * 1996/9/25 Geert Uytterhoeven: | |
87 | * - Modularization | |
88 | * | |
89 | * 1998/6/10 Andreas Schwab: | |
90 | * - Converted to use sound_core | |
91 | * | |
92 | * 1999/12/28 Richard Zidlicky: | |
93 | * - Added support for Q40 | |
94 | * | |
95 | * 2000/2/27 Geert Uytterhoeven: | |
96 | * - Clean up and split the code into 4 parts: | |
97 | * o dmasound_core: machine-independent code | |
98 | * o dmasound_atari: Atari TT and Falcon support | |
99 | * o dmasound_awacs: Apple PowerMac support | |
100 | * o dmasound_paula: Amiga support | |
101 | * | |
102 | * 2000/3/25 Geert Uytterhoeven: | |
103 | * - Integration of dmasound_q40 | |
104 | * - Small clean ups | |
105 | * | |
106 | * 2001/01/26 [1.0] Iain Sandoe | |
107 | * - make /dev/sndstat show revision & edition info. | |
108 | * - since dmasound.mach.sq_setup() can fail on pmac | |
109 | * its type has been changed to int and the returns | |
110 | * are checked. | |
111 | * [1.1] - stop missing translations from being called. | |
112 | * 2001/02/08 [1.2] - remove unused translation tables & move machine- | |
113 | * specific tables to low-level. | |
114 | * - return correct info. for SNDCTL_DSP_GETFMTS. | |
115 | * [1.3] - implement SNDCTL_DSP_GETCAPS fully. | |
116 | * [1.4] - make /dev/sndstat text length usage deterministic. | |
117 | * - make /dev/sndstat call to low-level | |
118 | * dmasound.mach.state_info() pass max space to ll driver. | |
119 | * - tidy startup banners and output info. | |
120 | * [1.5] - tidy up a little (removed some unused #defines in | |
121 | * dmasound.h) | |
122 | * - fix up HAS_RECORD conditionalisation. | |
123 | * - add record code in places it is missing... | |
124 | * - change buf-sizes to bytes to allow < 1kb for pmac | |
125 | * if user param entry is < 256 the value is taken to | |
126 | * be in kb > 256 is taken to be in bytes. | |
127 | * - make default buff/frag params conditional on | |
128 | * machine to allow smaller values for pmac. | |
129 | * - made the ioctls, read & write comply with the OSS | |
130 | * rules on setting params. | |
131 | * - added parsing of _setup() params for record. | |
132 | * 2001/04/04 [1.6] - fix bug where sample rates higher than maximum were | |
133 | * being reported as OK. | |
134 | * - fix open() to return -EBUSY as per OSS doc. when | |
135 | * audio is in use - this is independent of O_NOBLOCK. | |
136 | * - fix bug where SNDCTL_DSP_POST was blocking. | |
137 | */ | |
138 | ||
139 | /* Record capability notes 30/01/2001: | |
140 | * At present these observations apply only to pmac LL driver (the only one | |
141 | * that can do record, at present). However, if other LL drivers for machines | |
142 | * with record are added they may apply. | |
143 | * | |
144 | * The fragment parameters for the record and play channels are separate. | |
145 | * However, if the driver is opened O_RDWR there is no way (in the current OSS | |
146 | * API) to specify their values independently for the record and playback | |
147 | * channels. Since the only common factor between the input & output is the | |
148 | * sample rate (on pmac) it should be possible to open /dev/dspX O_WRONLY and | |
149 | * /dev/dspY O_RDONLY. The input & output channels could then have different | |
150 | * characteristics (other than the first that sets sample rate claiming the | |
151 | * right to set it for ever). As it stands, the format, channels, number of | |
152 | * bits & sample rate are assumed to be common. In the future perhaps these | |
153 | * should be the responsibility of the LL driver - and then if a card really | |
154 | * does not share items between record & playback they can be specified | |
155 | * separately. | |
156 | */ | |
157 | ||
158 | /* Thread-safeness of shared_resources notes: 31/01/2001 | |
159 | * If the user opens O_RDWR and then splits record & play between two threads | |
160 | * both of which inherit the fd - and then starts changing things from both | |
161 | * - we will have difficulty telling. | |
162 | * | |
163 | * It's bad application coding - but ... | |
164 | * TODO: think about how to sort this out... without bogging everything down in | |
165 | * semaphores. | |
166 | * | |
167 | * Similarly, the OSS spec says "all changes to parameters must be between | |
168 | * open() and the first read() or write(). - and a bit later on (by | |
169 | * implication) "between SNDCTL_DSP_RESET and the first read() or write() after | |
170 | * it". If the app is multi-threaded and this rule is broken between threads | |
171 | * we will have trouble spotting it - and the fault will be rather obscure :-( | |
172 | * | |
173 | * We will try and put out at least a kmsg if we see it happen... but I think | |
174 | * it will be quite hard to trap it with an -EXXX return... because we can't | |
175 | * see the fault until after the damage is done. | |
176 | */ | |
177 | ||
178 | #include <linux/module.h> | |
179 | #include <linux/slab.h> | |
180 | #include <linux/sound.h> | |
181 | #include <linux/init.h> | |
182 | #include <linux/soundcard.h> | |
183 | #include <linux/poll.h> | |
645ef9ef | 184 | #include <linux/mutex.h> |
174cd4b1 | 185 | #include <linux/sched/signal.h> |
1da177e4 | 186 | |
7c0f6ba6 | 187 | #include <linux/uaccess.h> |
1da177e4 LT |
188 | |
189 | #include "dmasound.h" | |
190 | ||
191 | #define DMASOUND_CORE_REVISION 1 | |
192 | #define DMASOUND_CORE_EDITION 6 | |
193 | ||
194 | /* | |
195 | * Declarations | |
196 | */ | |
197 | ||
645ef9ef | 198 | static DEFINE_MUTEX(dmasound_core_mutex); |
1da177e4 | 199 | int dmasound_catchRadius = 0; |
8d3b33f6 | 200 | module_param(dmasound_catchRadius, int, 0); |
1da177e4 LT |
201 | |
202 | static unsigned int numWriteBufs = DEFAULT_N_BUFFERS; | |
8d3b33f6 | 203 | module_param(numWriteBufs, int, 0); |
1da177e4 | 204 | static unsigned int writeBufSize = DEFAULT_BUFF_SIZE ; /* in bytes */ |
8d3b33f6 | 205 | module_param(writeBufSize, int, 0); |
1da177e4 | 206 | |
1da177e4 LT |
207 | MODULE_LICENSE("GPL"); |
208 | ||
209 | #ifdef MODULE | |
210 | static int sq_unit = -1; | |
211 | static int mixer_unit = -1; | |
212 | static int state_unit = -1; | |
213 | static int irq_installed; | |
214 | #endif /* MODULE */ | |
215 | ||
1da177e4 | 216 | /* control over who can modify resources shared between play/record */ |
aeb5d727 | 217 | static fmode_t shared_resource_owner; |
1da177e4 LT |
218 | static int shared_resources_initialised; |
219 | ||
220 | /* | |
221 | * Mid level stuff | |
222 | */ | |
223 | ||
70edc800 TG |
224 | struct sound_settings dmasound = { |
225 | .lock = __SPIN_LOCK_UNLOCKED(dmasound.lock) | |
226 | }; | |
1da177e4 LT |
227 | |
228 | static inline void sound_silence(void) | |
229 | { | |
230 | dmasound.mach.silence(); /* _MUST_ stop DMA */ | |
231 | } | |
232 | ||
233 | static inline int sound_set_format(int format) | |
234 | { | |
235 | return dmasound.mach.setFormat(format); | |
236 | } | |
237 | ||
238 | ||
239 | static int sound_set_speed(int speed) | |
240 | { | |
241 | if (speed < 0) | |
242 | return dmasound.soft.speed; | |
243 | ||
244 | /* trap out-of-range speed settings. | |
245 | at present we allow (arbitrarily) low rates - using soft | |
246 | up-conversion - but we can't allow > max because there is | |
247 | no soft down-conversion. | |
248 | */ | |
249 | if (dmasound.mach.max_dsp_speed && | |
250 | (speed > dmasound.mach.max_dsp_speed)) | |
251 | speed = dmasound.mach.max_dsp_speed ; | |
252 | ||
253 | dmasound.soft.speed = speed; | |
254 | ||
255 | if (dmasound.minDev == SND_DEV_DSP) | |
256 | dmasound.dsp.speed = dmasound.soft.speed; | |
257 | ||
258 | return dmasound.soft.speed; | |
259 | } | |
260 | ||
261 | static int sound_set_stereo(int stereo) | |
262 | { | |
263 | if (stereo < 0) | |
264 | return dmasound.soft.stereo; | |
265 | ||
266 | stereo = !!stereo; /* should be 0 or 1 now */ | |
267 | ||
268 | dmasound.soft.stereo = stereo; | |
269 | if (dmasound.minDev == SND_DEV_DSP) | |
270 | dmasound.dsp.stereo = stereo; | |
271 | ||
272 | return stereo; | |
273 | } | |
274 | ||
275 | static ssize_t sound_copy_translate(TRANS *trans, const u_char __user *userPtr, | |
276 | size_t userCount, u_char frame[], | |
277 | ssize_t *frameUsed, ssize_t frameLeft) | |
278 | { | |
279 | ssize_t (*ct_func)(const u_char __user *, size_t, u_char *, ssize_t *, ssize_t); | |
280 | ||
281 | switch (dmasound.soft.format) { | |
282 | case AFMT_MU_LAW: | |
283 | ct_func = trans->ct_ulaw; | |
284 | break; | |
285 | case AFMT_A_LAW: | |
286 | ct_func = trans->ct_alaw; | |
287 | break; | |
288 | case AFMT_S8: | |
289 | ct_func = trans->ct_s8; | |
290 | break; | |
291 | case AFMT_U8: | |
292 | ct_func = trans->ct_u8; | |
293 | break; | |
294 | case AFMT_S16_BE: | |
295 | ct_func = trans->ct_s16be; | |
296 | break; | |
297 | case AFMT_U16_BE: | |
298 | ct_func = trans->ct_u16be; | |
299 | break; | |
300 | case AFMT_S16_LE: | |
301 | ct_func = trans->ct_s16le; | |
302 | break; | |
303 | case AFMT_U16_LE: | |
304 | ct_func = trans->ct_u16le; | |
305 | break; | |
306 | default: | |
307 | return 0; | |
308 | } | |
309 | /* if the user has requested a non-existent translation don't try | |
310 | to call it but just return 0 bytes moved | |
311 | */ | |
312 | if (ct_func) | |
313 | return ct_func(userPtr, userCount, frame, frameUsed, frameLeft); | |
314 | return 0; | |
315 | } | |
316 | ||
317 | /* | |
318 | * /dev/mixer abstraction | |
319 | */ | |
320 | ||
321 | static struct { | |
322 | int busy; | |
323 | int modify_counter; | |
324 | } mixer; | |
325 | ||
326 | static int mixer_open(struct inode *inode, struct file *file) | |
327 | { | |
645ef9ef | 328 | mutex_lock(&dmasound_core_mutex); |
90dc763f | 329 | if (!try_module_get(dmasound.mach.owner)) { |
645ef9ef | 330 | mutex_unlock(&dmasound_core_mutex); |
1da177e4 | 331 | return -ENODEV; |
90dc763f | 332 | } |
1da177e4 | 333 | mixer.busy = 1; |
645ef9ef | 334 | mutex_unlock(&dmasound_core_mutex); |
1da177e4 LT |
335 | return 0; |
336 | } | |
337 | ||
338 | static int mixer_release(struct inode *inode, struct file *file) | |
339 | { | |
645ef9ef | 340 | mutex_lock(&dmasound_core_mutex); |
1da177e4 LT |
341 | mixer.busy = 0; |
342 | module_put(dmasound.mach.owner); | |
645ef9ef | 343 | mutex_unlock(&dmasound_core_mutex); |
1da177e4 LT |
344 | return 0; |
345 | } | |
d209974c AB |
346 | |
347 | static int mixer_ioctl(struct file *file, u_int cmd, u_long arg) | |
1da177e4 LT |
348 | { |
349 | if (_SIOC_DIR(cmd) & _SIOC_WRITE) | |
350 | mixer.modify_counter++; | |
351 | switch (cmd) { | |
352 | case OSS_GETVERSION: | |
353 | return IOCTL_OUT(arg, SOUND_VERSION); | |
354 | case SOUND_MIXER_INFO: | |
355 | { | |
356 | mixer_info info; | |
357 | memset(&info, 0, sizeof(info)); | |
358 | strlcpy(info.id, dmasound.mach.name2, sizeof(info.id)); | |
359 | strlcpy(info.name, dmasound.mach.name2, sizeof(info.name)); | |
360 | info.modify_counter = mixer.modify_counter; | |
361 | if (copy_to_user((void __user *)arg, &info, sizeof(info))) | |
362 | return -EFAULT; | |
363 | return 0; | |
364 | } | |
365 | } | |
366 | if (dmasound.mach.mixer_ioctl) | |
367 | return dmasound.mach.mixer_ioctl(cmd, arg); | |
368 | return -EINVAL; | |
369 | } | |
370 | ||
d209974c AB |
371 | static long mixer_unlocked_ioctl(struct file *file, u_int cmd, u_long arg) |
372 | { | |
373 | int ret; | |
374 | ||
645ef9ef | 375 | mutex_lock(&dmasound_core_mutex); |
d209974c | 376 | ret = mixer_ioctl(file, cmd, arg); |
645ef9ef | 377 | mutex_unlock(&dmasound_core_mutex); |
d209974c AB |
378 | |
379 | return ret; | |
380 | } | |
381 | ||
9c2e08c5 | 382 | static const struct file_operations mixer_fops = |
1da177e4 LT |
383 | { |
384 | .owner = THIS_MODULE, | |
385 | .llseek = no_llseek, | |
d209974c | 386 | .unlocked_ioctl = mixer_unlocked_ioctl, |
2022ca0a | 387 | .compat_ioctl = compat_ptr_ioctl, |
1da177e4 LT |
388 | .open = mixer_open, |
389 | .release = mixer_release, | |
390 | }; | |
391 | ||
392 | static void mixer_init(void) | |
393 | { | |
394 | #ifndef MODULE | |
395 | int mixer_unit; | |
396 | #endif | |
397 | mixer_unit = register_sound_mixer(&mixer_fops, -1); | |
398 | if (mixer_unit < 0) | |
399 | return; | |
400 | ||
401 | mixer.busy = 0; | |
402 | dmasound.treble = 0; | |
403 | dmasound.bass = 0; | |
404 | if (dmasound.mach.mixer_init) | |
405 | dmasound.mach.mixer_init(); | |
406 | } | |
407 | ||
408 | ||
409 | /* | |
410 | * Sound queue stuff, the heart of the driver | |
411 | */ | |
412 | ||
413 | struct sound_queue dmasound_write_sq; | |
414 | static void sq_reset_output(void) ; | |
1da177e4 LT |
415 | |
416 | static int sq_allocate_buffers(struct sound_queue *sq, int num, int size) | |
417 | { | |
418 | int i; | |
419 | ||
420 | if (sq->buffers) | |
421 | return 0; | |
422 | sq->numBufs = num; | |
423 | sq->bufSize = size; | |
6da2ec56 | 424 | sq->buffers = kmalloc_array (num, sizeof(char *), GFP_KERNEL); |
1da177e4 LT |
425 | if (!sq->buffers) |
426 | return -ENOMEM; | |
427 | for (i = 0; i < num; i++) { | |
428 | sq->buffers[i] = dmasound.mach.dma_alloc(size, GFP_KERNEL); | |
429 | if (!sq->buffers[i]) { | |
430 | while (i--) | |
431 | dmasound.mach.dma_free(sq->buffers[i], size); | |
432 | kfree(sq->buffers); | |
433 | sq->buffers = NULL; | |
434 | return -ENOMEM; | |
435 | } | |
436 | } | |
437 | return 0; | |
438 | } | |
439 | ||
440 | static void sq_release_buffers(struct sound_queue *sq) | |
441 | { | |
442 | int i; | |
443 | ||
444 | if (sq->buffers) { | |
445 | for (i = 0; i < sq->numBufs; i++) | |
446 | dmasound.mach.dma_free(sq->buffers[i], sq->bufSize); | |
447 | kfree(sq->buffers); | |
448 | sq->buffers = NULL; | |
449 | } | |
450 | } | |
451 | ||
452 | ||
453 | static int sq_setup(struct sound_queue *sq) | |
454 | { | |
455 | int (*setup_func)(void) = NULL; | |
456 | int hard_frame ; | |
457 | ||
458 | if (sq->locked) { /* are we already set? - and not changeable */ | |
459 | #ifdef DEBUG_DMASOUND | |
460 | printk("dmasound_core: tried to sq_setup a locked queue\n") ; | |
461 | #endif | |
462 | return -EINVAL ; | |
463 | } | |
464 | sq->locked = 1 ; /* don't think we have a race prob. here _check_ */ | |
465 | ||
466 | /* make sure that the parameters are set up | |
467 | This should have been done already... | |
468 | */ | |
469 | ||
470 | dmasound.mach.init(); | |
471 | ||
472 | /* OK. If the user has set fragment parameters explicitly, then we | |
473 | should leave them alone... as long as they are valid. | |
474 | Invalid user fragment params can occur if we allow the whole buffer | |
475 | to be used when the user requests the fragments sizes (with no soft | |
476 | x-lation) and then the user subsequently sets a soft x-lation that | |
477 | requires increased internal buffering. | |
478 | ||
479 | Othwerwise (if the user did not set them) OSS says that we should | |
480 | select frag params on the basis of 0.5 s output & 0.1 s input | |
481 | latency. (TODO. For now we will copy in the defaults.) | |
482 | */ | |
483 | ||
484 | if (sq->user_frags <= 0) { | |
485 | sq->max_count = sq->numBufs ; | |
486 | sq->max_active = sq->numBufs ; | |
487 | sq->block_size = sq->bufSize; | |
488 | /* set up the user info */ | |
489 | sq->user_frags = sq->numBufs ; | |
490 | sq->user_frag_size = sq->bufSize ; | |
491 | sq->user_frag_size *= | |
492 | (dmasound.soft.size * (dmasound.soft.stereo+1) ) ; | |
493 | sq->user_frag_size /= | |
494 | (dmasound.hard.size * (dmasound.hard.stereo+1) ) ; | |
495 | } else { | |
496 | /* work out requested block size */ | |
497 | sq->block_size = sq->user_frag_size ; | |
498 | sq->block_size *= | |
499 | (dmasound.hard.size * (dmasound.hard.stereo+1) ) ; | |
500 | sq->block_size /= | |
501 | (dmasound.soft.size * (dmasound.soft.stereo+1) ) ; | |
502 | /* the user wants to write frag-size chunks */ | |
503 | sq->block_size *= dmasound.hard.speed ; | |
504 | sq->block_size /= dmasound.soft.speed ; | |
505 | /* this only works for size values which are powers of 2 */ | |
506 | hard_frame = | |
507 | (dmasound.hard.size * (dmasound.hard.stereo+1))/8 ; | |
508 | sq->block_size += (hard_frame - 1) ; | |
509 | sq->block_size &= ~(hard_frame - 1) ; /* make sure we are aligned */ | |
510 | /* let's just check for obvious mistakes */ | |
511 | if ( sq->block_size <= 0 || sq->block_size > sq->bufSize) { | |
512 | #ifdef DEBUG_DMASOUND | |
513 | printk("dmasound_core: invalid frag size (user set %d)\n", sq->user_frag_size) ; | |
514 | #endif | |
515 | sq->block_size = sq->bufSize ; | |
516 | } | |
517 | if ( sq->user_frags <= sq->numBufs ) { | |
518 | sq->max_count = sq->user_frags ; | |
519 | /* if user has set max_active - then use it */ | |
520 | sq->max_active = (sq->max_active <= sq->max_count) ? | |
521 | sq->max_active : sq->max_count ; | |
522 | } else { | |
523 | #ifdef DEBUG_DMASOUND | |
524 | printk("dmasound_core: invalid frag count (user set %d)\n", sq->user_frags) ; | |
525 | #endif | |
526 | sq->max_count = | |
527 | sq->max_active = sq->numBufs ; | |
528 | } | |
529 | } | |
530 | sq->front = sq->count = sq->rear_size = 0; | |
531 | sq->syncing = 0; | |
532 | sq->active = 0; | |
533 | ||
534 | if (sq == &write_sq) { | |
535 | sq->rear = -1; | |
536 | setup_func = dmasound.mach.write_sq_setup; | |
537 | } | |
1da177e4 LT |
538 | if (setup_func) |
539 | return setup_func(); | |
540 | return 0 ; | |
541 | } | |
542 | ||
543 | static inline void sq_play(void) | |
544 | { | |
545 | dmasound.mach.play(); | |
546 | } | |
547 | ||
548 | static ssize_t sq_write(struct file *file, const char __user *src, size_t uLeft, | |
549 | loff_t *ppos) | |
550 | { | |
551 | ssize_t uWritten = 0; | |
552 | u_char *dest; | |
553 | ssize_t uUsed = 0, bUsed, bLeft; | |
554 | unsigned long flags ; | |
555 | ||
556 | /* ++TeSche: Is something like this necessary? | |
557 | * Hey, that's an honest question! Or does any other part of the | |
558 | * filesystem already checks this situation? I really don't know. | |
559 | */ | |
560 | if (uLeft == 0) | |
561 | return 0; | |
562 | ||
563 | /* implement any changes we have made to the soft/hard params. | |
564 | this is not satisfactory really, all we have done up to now is to | |
565 | say what we would like - there hasn't been any real checking of capability | |
566 | */ | |
567 | ||
568 | if (shared_resources_initialised == 0) { | |
569 | dmasound.mach.init() ; | |
570 | shared_resources_initialised = 1 ; | |
571 | } | |
572 | ||
573 | /* set up the sq if it is not already done. This may seem a dumb place | |
574 | to do it - but it is what OSS requires. It means that write() can | |
575 | return memory allocation errors. To avoid this possibility use the | |
576 | GETBLKSIZE or GETOSPACE ioctls (after you've fiddled with all the | |
577 | params you want to change) - these ioctls also force the setup. | |
578 | */ | |
579 | ||
580 | if (write_sq.locked == 0) { | |
581 | if ((uWritten = sq_setup(&write_sq)) < 0) return uWritten ; | |
582 | uWritten = 0 ; | |
583 | } | |
584 | ||
585 | /* FIXME: I think that this may be the wrong behaviour when we get strapped | |
586 | for time and the cpu is close to being (or actually) behind in sending data. | |
587 | - because we've lost the time that the N samples, already in the buffer, | |
588 | would have given us to get here with the next lot from the user. | |
589 | */ | |
590 | /* The interrupt doesn't start to play the last, incomplete frame. | |
591 | * Thus we can append to it without disabling the interrupts! (Note | |
592 | * also that write_sq.rear isn't affected by the interrupt.) | |
593 | */ | |
594 | ||
595 | /* as of 1.6 this behaviour changes if SNDCTL_DSP_POST has been issued: | |
596 | this will mimic the behaviour of syncing and allow the sq_play() to | |
597 | queue a partial fragment. Since sq_play() may/will be called from | |
598 | the IRQ handler - at least on Pmac we have to deal with it. | |
599 | The strategy - possibly not optimum - is to kill _POST status if we | |
600 | get here. This seems, at least, reasonable - in the sense that POST | |
601 | is supposed to indicate that we might not write before the queue | |
602 | is drained - and if we get here in time then it does not apply. | |
603 | */ | |
604 | ||
605 | spin_lock_irqsave(&dmasound.lock, flags); | |
606 | write_sq.syncing &= ~2 ; /* take out POST status */ | |
607 | spin_unlock_irqrestore(&dmasound.lock, flags); | |
608 | ||
609 | if (write_sq.count > 0 && | |
610 | (bLeft = write_sq.block_size-write_sq.rear_size) > 0) { | |
611 | dest = write_sq.buffers[write_sq.rear]; | |
612 | bUsed = write_sq.rear_size; | |
613 | uUsed = sound_copy_translate(dmasound.trans_write, src, uLeft, | |
614 | dest, &bUsed, bLeft); | |
615 | if (uUsed <= 0) | |
616 | return uUsed; | |
617 | src += uUsed; | |
618 | uWritten += uUsed; | |
619 | uLeft = (uUsed <= uLeft) ? (uLeft - uUsed) : 0 ; /* paranoia */ | |
620 | write_sq.rear_size = bUsed; | |
621 | } | |
622 | ||
623 | while (uLeft) { | |
1a1e0a80 AB |
624 | DEFINE_WAIT(wait); |
625 | ||
1da177e4 | 626 | while (write_sq.count >= write_sq.max_active) { |
1a1e0a80 | 627 | prepare_to_wait(&write_sq.action_queue, &wait, TASK_INTERRUPTIBLE); |
1da177e4 | 628 | sq_play(); |
1a1e0a80 AB |
629 | if (write_sq.non_blocking) { |
630 | finish_wait(&write_sq.action_queue, &wait); | |
1da177e4 | 631 | return uWritten > 0 ? uWritten : -EAGAIN; |
1a1e0a80 AB |
632 | } |
633 | if (write_sq.count < write_sq.max_active) | |
634 | break; | |
635 | ||
636 | schedule_timeout(HZ); | |
637 | if (signal_pending(current)) { | |
638 | finish_wait(&write_sq.action_queue, &wait); | |
1da177e4 | 639 | return uWritten > 0 ? uWritten : -EINTR; |
1a1e0a80 | 640 | } |
1da177e4 LT |
641 | } |
642 | ||
1a1e0a80 AB |
643 | finish_wait(&write_sq.action_queue, &wait); |
644 | ||
1da177e4 LT |
645 | /* Here, we can avoid disabling the interrupt by first |
646 | * copying and translating the data, and then updating | |
647 | * the write_sq variables. Until this is done, the interrupt | |
648 | * won't see the new frame and we can work on it | |
649 | * undisturbed. | |
650 | */ | |
651 | ||
652 | dest = write_sq.buffers[(write_sq.rear+1) % write_sq.max_count]; | |
653 | bUsed = 0; | |
654 | bLeft = write_sq.block_size; | |
655 | uUsed = sound_copy_translate(dmasound.trans_write, src, uLeft, | |
656 | dest, &bUsed, bLeft); | |
657 | if (uUsed <= 0) | |
658 | break; | |
659 | src += uUsed; | |
660 | uWritten += uUsed; | |
661 | uLeft = (uUsed <= uLeft) ? (uLeft - uUsed) : 0 ; /* paranoia */ | |
662 | if (bUsed) { | |
663 | write_sq.rear = (write_sq.rear+1) % write_sq.max_count; | |
664 | write_sq.rear_size = bUsed; | |
665 | write_sq.count++; | |
666 | } | |
667 | } /* uUsed may have been 0 */ | |
668 | ||
669 | sq_play(); | |
670 | ||
671 | return uUsed < 0? uUsed: uWritten; | |
672 | } | |
673 | ||
680ef72a | 674 | static __poll_t sq_poll(struct file *file, struct poll_table_struct *wait) |
1da177e4 | 675 | { |
680ef72a | 676 | __poll_t mask = 0; |
1da177e4 LT |
677 | int retVal; |
678 | ||
679 | if (write_sq.locked == 0) { | |
680 | if ((retVal = sq_setup(&write_sq)) < 0) | |
681 | return retVal; | |
682 | return 0; | |
683 | } | |
684 | if (file->f_mode & FMODE_WRITE ) | |
685 | poll_wait(file, &write_sq.action_queue, wait); | |
1da177e4 LT |
686 | if (file->f_mode & FMODE_WRITE) |
687 | if (write_sq.count < write_sq.max_active || write_sq.block_size - write_sq.rear_size > 0) | |
a9a08845 | 688 | mask |= EPOLLOUT | EPOLLWRNORM; |
1da177e4 LT |
689 | return mask; |
690 | ||
691 | } | |
692 | ||
1da177e4 LT |
693 | static inline void sq_init_waitqueue(struct sound_queue *sq) |
694 | { | |
695 | init_waitqueue_head(&sq->action_queue); | |
696 | init_waitqueue_head(&sq->open_queue); | |
697 | init_waitqueue_head(&sq->sync_queue); | |
698 | sq->busy = 0; | |
699 | } | |
700 | ||
701 | #if 0 /* blocking open() */ | |
702 | static inline void sq_wake_up(struct sound_queue *sq, struct file *file, | |
aeb5d727 | 703 | fmode_t mode) |
1da177e4 LT |
704 | { |
705 | if (file->f_mode & mode) { | |
706 | sq->busy = 0; /* CHECK: IS THIS OK??? */ | |
707 | WAKE_UP(sq->open_queue); | |
708 | } | |
709 | } | |
710 | #endif | |
711 | ||
aeb5d727 | 712 | static int sq_open2(struct sound_queue *sq, struct file *file, fmode_t mode, |
1da177e4 LT |
713 | int numbufs, int bufsize) |
714 | { | |
715 | int rc = 0; | |
716 | ||
717 | if (file->f_mode & mode) { | |
718 | if (sq->busy) { | |
719 | #if 0 /* blocking open() */ | |
720 | rc = -EBUSY; | |
721 | if (file->f_flags & O_NONBLOCK) | |
722 | return rc; | |
723 | rc = -EINTR; | |
1a1e0a80 AB |
724 | if (wait_event_interruptible(sq->open_queue, !sq->busy)) |
725 | return rc; | |
1da177e4 LT |
726 | rc = 0; |
727 | #else | |
728 | /* OSS manual says we will return EBUSY regardless | |
729 | of O_NOBLOCK. | |
730 | */ | |
731 | return -EBUSY ; | |
732 | #endif | |
733 | } | |
734 | sq->busy = 1; /* Let's play spot-the-race-condition */ | |
735 | ||
736 | /* allocate the default number & size of buffers. | |
737 | (i.e. specified in _setup() or as module params) | |
738 | can't be changed at the moment - but _could_ be perhaps | |
739 | in the setfragments ioctl. | |
740 | */ | |
741 | if (( rc = sq_allocate_buffers(sq, numbufs, bufsize))) { | |
742 | #if 0 /* blocking open() */ | |
743 | sq_wake_up(sq, file, mode); | |
744 | #else | |
745 | sq->busy = 0 ; | |
746 | #endif | |
747 | return rc; | |
748 | } | |
749 | ||
4b30fbde | 750 | sq->non_blocking = file->f_flags & O_NONBLOCK; |
1da177e4 LT |
751 | } |
752 | return rc; | |
753 | } | |
754 | ||
755 | #define write_sq_init_waitqueue() sq_init_waitqueue(&write_sq) | |
756 | #if 0 /* blocking open() */ | |
757 | #define write_sq_wake_up(file) sq_wake_up(&write_sq, file, FMODE_WRITE) | |
758 | #endif | |
759 | #define write_sq_release_buffers() sq_release_buffers(&write_sq) | |
760 | #define write_sq_open(file) \ | |
761 | sq_open2(&write_sq, file, FMODE_WRITE, numWriteBufs, writeBufSize ) | |
762 | ||
1da177e4 LT |
763 | static int sq_open(struct inode *inode, struct file *file) |
764 | { | |
765 | int rc; | |
766 | ||
645ef9ef | 767 | mutex_lock(&dmasound_core_mutex); |
90dc763f | 768 | if (!try_module_get(dmasound.mach.owner)) { |
645ef9ef | 769 | mutex_unlock(&dmasound_core_mutex); |
1da177e4 | 770 | return -ENODEV; |
90dc763f | 771 | } |
1da177e4 LT |
772 | |
773 | rc = write_sq_open(file); /* checks the f_mode */ | |
774 | if (rc) | |
775 | goto out; | |
1da177e4 LT |
776 | if (file->f_mode & FMODE_READ) { |
777 | /* TODO: if O_RDWR, release any resources grabbed by write part */ | |
778 | rc = -ENXIO ; /* I think this is what is required by open(2) */ | |
779 | goto out; | |
780 | } | |
1da177e4 LT |
781 | |
782 | if (dmasound.mach.sq_open) | |
783 | dmasound.mach.sq_open(file->f_mode); | |
784 | ||
785 | /* CHECK whether this is sensible - in the case that dsp0 could be opened | |
786 | O_RDONLY and dsp1 could be opened O_WRONLY | |
787 | */ | |
788 | ||
789 | dmasound.minDev = iminor(inode) & 0x0f; | |
790 | ||
791 | /* OK. - we should make some attempt at consistency. At least the H'ware | |
792 | options should be set with a valid mode. We will make it that the LL | |
793 | driver must supply defaults for hard & soft params. | |
794 | */ | |
795 | ||
796 | if (shared_resource_owner == 0) { | |
797 | /* you can make this AFMT_U8/mono/8K if you want to mimic old | |
798 | OSS behaviour - while we still have soft translations ;-) */ | |
799 | dmasound.soft = dmasound.mach.default_soft ; | |
800 | dmasound.dsp = dmasound.mach.default_soft ; | |
801 | dmasound.hard = dmasound.mach.default_hard ; | |
802 | } | |
803 | ||
804 | #ifndef DMASOUND_STRICT_OSS_COMPLIANCE | |
805 | /* none of the current LL drivers can actually do this "native" at the moment | |
806 | OSS does not really require us to supply /dev/audio if we can't do it. | |
807 | */ | |
808 | if (dmasound.minDev == SND_DEV_AUDIO) { | |
809 | sound_set_speed(8000); | |
810 | sound_set_stereo(0); | |
811 | sound_set_format(AFMT_MU_LAW); | |
812 | } | |
813 | #endif | |
645ef9ef | 814 | mutex_unlock(&dmasound_core_mutex); |
1da177e4 LT |
815 | return 0; |
816 | out: | |
817 | module_put(dmasound.mach.owner); | |
645ef9ef | 818 | mutex_unlock(&dmasound_core_mutex); |
1da177e4 LT |
819 | return rc; |
820 | } | |
821 | ||
822 | static void sq_reset_output(void) | |
823 | { | |
824 | sound_silence(); /* this _must_ stop DMA, we might be about to lose the buffers */ | |
825 | write_sq.active = 0; | |
826 | write_sq.count = 0; | |
827 | write_sq.rear_size = 0; | |
828 | /* write_sq.front = (write_sq.rear+1) % write_sq.max_count;*/ | |
829 | write_sq.front = 0 ; | |
830 | write_sq.rear = -1 ; /* same as for set-up */ | |
831 | ||
832 | /* OK - we can unlock the parameters and fragment settings */ | |
833 | write_sq.locked = 0 ; | |
834 | write_sq.user_frags = 0 ; | |
835 | write_sq.user_frag_size = 0 ; | |
836 | } | |
837 | ||
1da177e4 LT |
838 | static void sq_reset(void) |
839 | { | |
840 | sq_reset_output() ; | |
1da177e4 LT |
841 | /* we could consider resetting the shared_resources_owner here... but I |
842 | think it is probably still rather non-obvious to application writer | |
843 | */ | |
844 | ||
845 | /* we release everything else though */ | |
846 | shared_resources_initialised = 0 ; | |
847 | } | |
848 | ||
fca660be | 849 | static int sq_fsync(void) |
1da177e4 LT |
850 | { |
851 | int rc = 0; | |
852 | int timeout = 5; | |
853 | ||
854 | write_sq.syncing |= 1; | |
855 | sq_play(); /* there may be an incomplete frame waiting */ | |
856 | ||
857 | while (write_sq.active) { | |
1a1e0a80 AB |
858 | wait_event_interruptible_timeout(write_sq.sync_queue, |
859 | !write_sq.active, HZ); | |
1da177e4 LT |
860 | if (signal_pending(current)) { |
861 | /* While waiting for audio output to drain, an | |
862 | * interrupt occurred. Stop audio output immediately | |
863 | * and clear the queue. */ | |
864 | sq_reset_output(); | |
865 | rc = -EINTR; | |
866 | break; | |
867 | } | |
868 | if (!--timeout) { | |
869 | printk(KERN_WARNING "dmasound: Timeout draining output\n"); | |
870 | sq_reset_output(); | |
871 | rc = -EIO; | |
872 | break; | |
873 | } | |
874 | } | |
875 | ||
876 | /* flag no sync regardless of whether we had a DSP_POST or not */ | |
877 | write_sq.syncing = 0 ; | |
878 | return rc; | |
879 | } | |
880 | ||
881 | static int sq_release(struct inode *inode, struct file *file) | |
882 | { | |
883 | int rc = 0; | |
884 | ||
645ef9ef | 885 | mutex_lock(&dmasound_core_mutex); |
1da177e4 | 886 | |
1da177e4 LT |
887 | if (file->f_mode & FMODE_WRITE) { |
888 | if (write_sq.busy) | |
fca660be | 889 | rc = sq_fsync(); |
1da177e4 LT |
890 | |
891 | sq_reset_output() ; /* make sure dma is stopped and all is quiet */ | |
892 | write_sq_release_buffers(); | |
893 | write_sq.busy = 0; | |
894 | } | |
895 | ||
896 | if (file->f_mode & shared_resource_owner) { /* it's us that has them */ | |
897 | shared_resource_owner = 0 ; | |
898 | shared_resources_initialised = 0 ; | |
899 | dmasound.hard = dmasound.mach.default_hard ; | |
900 | } | |
901 | ||
902 | module_put(dmasound.mach.owner); | |
903 | ||
904 | #if 0 /* blocking open() */ | |
905 | /* Wake up a process waiting for the queue being released. | |
906 | * Note: There may be several processes waiting for a call | |
907 | * to open() returning. */ | |
908 | ||
909 | /* Iain: hmm I don't understand this next comment ... */ | |
910 | /* There is probably a DOS atack here. They change the mode flag. */ | |
911 | /* XXX add check here,*/ | |
912 | read_sq_wake_up(file); /* checks f_mode */ | |
913 | write_sq_wake_up(file); /* checks f_mode */ | |
914 | #endif /* blocking open() */ | |
915 | ||
645ef9ef | 916 | mutex_unlock(&dmasound_core_mutex); |
1da177e4 LT |
917 | |
918 | return rc; | |
919 | } | |
920 | ||
921 | /* here we see if we have a right to modify format, channels, size and so on | |
922 | if no-one else has claimed it already then we do... | |
923 | ||
924 | TODO: We might change this to mask O_RDWR such that only one or the other channel | |
925 | is the owner - if we have problems. | |
926 | */ | |
927 | ||
aeb5d727 | 928 | static int shared_resources_are_mine(fmode_t md) |
1da177e4 LT |
929 | { |
930 | if (shared_resource_owner) | |
aeb5d727 | 931 | return (shared_resource_owner & md) != 0; |
1da177e4 LT |
932 | else { |
933 | shared_resource_owner = md ; | |
934 | return 1 ; | |
935 | } | |
936 | } | |
937 | ||
938 | /* if either queue is locked we must deny the right to change shared params | |
939 | */ | |
940 | ||
941 | static int queues_are_quiescent(void) | |
942 | { | |
1da177e4 LT |
943 | if (write_sq.locked) |
944 | return 0 ; | |
945 | return 1 ; | |
946 | } | |
947 | ||
948 | /* check and set a queue's fragments per user's wishes... | |
949 | we will check against the pre-defined literals and the actual sizes. | |
950 | This is a bit fraught - because soft translations can mess with our | |
951 | buffer requirements *after* this call - OSS says "call setfrags first" | |
952 | */ | |
953 | ||
954 | /* It is possible to replace all the -EINVAL returns with an override that | |
955 | just puts the allowable value in. This may be what many OSS apps require | |
956 | */ | |
957 | ||
958 | static int set_queue_frags(struct sound_queue *sq, int bufs, int size) | |
959 | { | |
960 | if (sq->locked) { | |
961 | #ifdef DEBUG_DMASOUND | |
962 | printk("dmasound_core: tried to set_queue_frags on a locked queue\n") ; | |
963 | #endif | |
964 | return -EINVAL ; | |
965 | } | |
966 | ||
967 | if ((size < MIN_FRAG_SIZE) || (size > MAX_FRAG_SIZE)) | |
968 | return -EINVAL ; | |
969 | size = (1<<size) ; /* now in bytes */ | |
970 | if (size > sq->bufSize) | |
971 | return -EINVAL ; /* this might still not work */ | |
972 | ||
973 | if (bufs <= 0) | |
974 | return -EINVAL ; | |
975 | if (bufs > sq->numBufs) /* the user is allowed say "don't care" with 0x7fff */ | |
976 | bufs = sq->numBufs ; | |
977 | ||
978 | /* there is, currently, no way to specify max_active separately | |
979 | from max_count. This could be a LL driver issue - I guess | |
980 | if there is a requirement for these values to be different then | |
981 | we will have to pass that info. up to this level. | |
982 | */ | |
983 | sq->user_frags = | |
984 | sq->max_active = bufs ; | |
985 | sq->user_frag_size = size ; | |
986 | ||
987 | return 0 ; | |
988 | } | |
989 | ||
d209974c | 990 | static int sq_ioctl(struct file *file, u_int cmd, u_long arg) |
1da177e4 LT |
991 | { |
992 | int val, result; | |
993 | u_long fmt; | |
994 | int data; | |
995 | int size, nbufs; | |
996 | audio_buf_info info; | |
997 | ||
998 | switch (cmd) { | |
999 | case SNDCTL_DSP_RESET: | |
1000 | sq_reset(); | |
1001 | return 0; | |
1002 | break ; | |
1003 | case SNDCTL_DSP_GETFMTS: | |
1004 | fmt = dmasound.mach.hardware_afmts ; /* this is what OSS says.. */ | |
1005 | return IOCTL_OUT(arg, fmt); | |
1006 | break ; | |
1007 | case SNDCTL_DSP_GETBLKSIZE: | |
1008 | /* this should tell the caller about bytes that the app can | |
1009 | read/write - the app doesn't care about our internal buffers. | |
1010 | We force sq_setup() here as per OSS 1.1 (which should | |
1011 | compute the values necessary). | |
1012 | Since there is no mechanism to specify read/write separately, for | |
1013 | fds opened O_RDWR, the write_sq values will, arbitrarily, overwrite | |
1014 | the read_sq ones. | |
1015 | */ | |
1016 | size = 0 ; | |
1da177e4 LT |
1017 | if (file->f_mode & FMODE_WRITE) { |
1018 | if ( !write_sq.locked ) | |
1019 | sq_setup(&write_sq) ; | |
1020 | size = write_sq.user_frag_size ; | |
1021 | } | |
1022 | return IOCTL_OUT(arg, size); | |
1023 | break ; | |
1024 | case SNDCTL_DSP_POST: | |
1025 | /* all we are going to do is to tell the LL that any | |
1026 | partial frags can be queued for output. | |
1027 | The LL will have to clear this flag when last output | |
1028 | is queued. | |
1029 | */ | |
1030 | write_sq.syncing |= 0x2 ; | |
1031 | sq_play() ; | |
1032 | return 0 ; | |
1033 | case SNDCTL_DSP_SYNC: | |
1034 | /* This call, effectively, has the same behaviour as SNDCTL_DSP_RESET | |
1035 | except that it waits for output to finish before resetting | |
25985edc | 1036 | everything - read, however, is killed immediately. |
1da177e4 LT |
1037 | */ |
1038 | result = 0 ; | |
1da177e4 | 1039 | if (file->f_mode & FMODE_WRITE) { |
fca660be | 1040 | result = sq_fsync(); |
1da177e4 LT |
1041 | sq_reset_output() ; |
1042 | } | |
1043 | /* if we are the shared resource owner then release them */ | |
1044 | if (file->f_mode & shared_resource_owner) | |
1045 | shared_resources_initialised = 0 ; | |
1046 | return result ; | |
1047 | break ; | |
1048 | case SOUND_PCM_READ_RATE: | |
1049 | return IOCTL_OUT(arg, dmasound.soft.speed); | |
1050 | case SNDCTL_DSP_SPEED: | |
1051 | /* changing this on the fly will have weird effects on the sound. | |
1052 | Where there are rate conversions implemented in soft form - it | |
1053 | will cause the _ctx_xxx() functions to be substituted. | |
1054 | However, there doesn't appear to be any reason to dis-allow it from | |
1055 | a driver pov. | |
1056 | */ | |
1057 | if (shared_resources_are_mine(file->f_mode)) { | |
1058 | IOCTL_IN(arg, data); | |
1059 | data = sound_set_speed(data) ; | |
1060 | shared_resources_initialised = 0 ; | |
1061 | return IOCTL_OUT(arg, data); | |
1062 | } else | |
1063 | return -EINVAL ; | |
1064 | break ; | |
1065 | /* OSS says these next 4 actions are undefined when the device is | |
1066 | busy/active - we will just return -EINVAL. | |
1067 | To be allowed to change one - (a) you have to own the right | |
1068 | (b) the queue(s) must be quiescent | |
1069 | */ | |
1070 | case SNDCTL_DSP_STEREO: | |
1071 | if (shared_resources_are_mine(file->f_mode) && | |
1072 | queues_are_quiescent()) { | |
1073 | IOCTL_IN(arg, data); | |
1074 | shared_resources_initialised = 0 ; | |
1075 | return IOCTL_OUT(arg, sound_set_stereo(data)); | |
1076 | } else | |
1077 | return -EINVAL ; | |
1078 | break ; | |
1079 | case SOUND_PCM_WRITE_CHANNELS: | |
1080 | if (shared_resources_are_mine(file->f_mode) && | |
1081 | queues_are_quiescent()) { | |
1082 | IOCTL_IN(arg, data); | |
1083 | /* the user might ask for 20 channels, we will return 1 or 2 */ | |
1084 | shared_resources_initialised = 0 ; | |
1085 | return IOCTL_OUT(arg, sound_set_stereo(data-1)+1); | |
1086 | } else | |
1087 | return -EINVAL ; | |
1088 | break ; | |
1089 | case SNDCTL_DSP_SETFMT: | |
1090 | if (shared_resources_are_mine(file->f_mode) && | |
1091 | queues_are_quiescent()) { | |
1092 | int format; | |
1093 | IOCTL_IN(arg, data); | |
1094 | shared_resources_initialised = 0 ; | |
1095 | format = sound_set_format(data); | |
1096 | result = IOCTL_OUT(arg, format); | |
1097 | if (result < 0) | |
1098 | return result; | |
1099 | if (format != data && data != AFMT_QUERY) | |
1100 | return -EINVAL; | |
1101 | return 0; | |
1102 | } else | |
1103 | return -EINVAL ; | |
1104 | case SNDCTL_DSP_SUBDIVIDE: | |
1105 | return -EINVAL ; | |
1106 | case SNDCTL_DSP_SETFRAGMENT: | |
1107 | /* we can do this independently for the two queues - with the | |
1108 | proviso that for fds opened O_RDWR we cannot separate the | |
1109 | actions and both queues will be set per the last call. | |
1110 | NOTE: this does *NOT* actually set the queue up - merely | |
1111 | registers our intentions. | |
1112 | */ | |
1113 | IOCTL_IN(arg, data); | |
1114 | result = 0 ; | |
1115 | nbufs = (data >> 16) & 0x7fff ; /* 0x7fff is 'use maximum' */ | |
1116 | size = data & 0xffff; | |
1da177e4 LT |
1117 | if (file->f_mode & FMODE_WRITE) { |
1118 | result = set_queue_frags(&write_sq, nbufs, size) ; | |
1119 | if (result) | |
1120 | return result ; | |
1121 | } | |
1122 | /* NOTE: this return value is irrelevant - OSS specifically says that | |
1123 | the value is 'random' and that the user _must_ check the actual | |
1124 | frags values using SNDCTL_DSP_GETBLKSIZE or similar */ | |
1125 | return IOCTL_OUT(arg, data); | |
1126 | break ; | |
1127 | case SNDCTL_DSP_GETOSPACE: | |
1128 | /* | |
1129 | */ | |
1130 | if (file->f_mode & FMODE_WRITE) { | |
1131 | if ( !write_sq.locked ) | |
1132 | sq_setup(&write_sq) ; | |
1133 | info.fragments = write_sq.max_active - write_sq.count; | |
1134 | info.fragstotal = write_sq.max_active; | |
1135 | info.fragsize = write_sq.user_frag_size; | |
1136 | info.bytes = info.fragments * info.fragsize; | |
1137 | if (copy_to_user((void __user *)arg, &info, sizeof(info))) | |
1138 | return -EFAULT; | |
1139 | return 0; | |
1140 | } else | |
1141 | return -EINVAL ; | |
1142 | break ; | |
1143 | case SNDCTL_DSP_GETCAPS: | |
1144 | val = dmasound.mach.capabilities & 0xffffff00; | |
1145 | return IOCTL_OUT(arg,val); | |
1146 | ||
1147 | default: | |
d209974c | 1148 | return mixer_ioctl(file, cmd, arg); |
1da177e4 LT |
1149 | } |
1150 | return -EINVAL; | |
1151 | } | |
1152 | ||
d209974c AB |
1153 | static long sq_unlocked_ioctl(struct file *file, u_int cmd, u_long arg) |
1154 | { | |
1155 | int ret; | |
1156 | ||
645ef9ef | 1157 | mutex_lock(&dmasound_core_mutex); |
d209974c | 1158 | ret = sq_ioctl(file, cmd, arg); |
645ef9ef | 1159 | mutex_unlock(&dmasound_core_mutex); |
d209974c AB |
1160 | |
1161 | return ret; | |
1162 | } | |
1163 | ||
9c2e08c5 | 1164 | static const struct file_operations sq_fops = |
1da177e4 LT |
1165 | { |
1166 | .owner = THIS_MODULE, | |
1167 | .llseek = no_llseek, | |
1168 | .write = sq_write, | |
1169 | .poll = sq_poll, | |
d209974c | 1170 | .unlocked_ioctl = sq_unlocked_ioctl, |
2022ca0a | 1171 | .compat_ioctl = compat_ptr_ioctl, |
1da177e4 LT |
1172 | .open = sq_open, |
1173 | .release = sq_release, | |
d8b3966e AV |
1174 | }; |
1175 | ||
1da177e4 LT |
1176 | static int sq_init(void) |
1177 | { | |
d8b3966e | 1178 | const struct file_operations *fops = &sq_fops; |
1da177e4 LT |
1179 | #ifndef MODULE |
1180 | int sq_unit; | |
1181 | #endif | |
1182 | ||
d8b3966e | 1183 | sq_unit = register_sound_dsp(fops, -1); |
1da177e4 LT |
1184 | if (sq_unit < 0) { |
1185 | printk(KERN_ERR "dmasound_core: couldn't register fops\n") ; | |
1186 | return sq_unit ; | |
1187 | } | |
1188 | ||
1189 | write_sq_init_waitqueue(); | |
1da177e4 LT |
1190 | |
1191 | /* These parameters will be restored for every clean open() | |
1192 | * in the case of multiple open()s (e.g. dsp0 & dsp1) they | |
1193 | * will be set so long as the shared resources have no owner. | |
1194 | */ | |
1195 | ||
1196 | if (shared_resource_owner == 0) { | |
1197 | dmasound.soft = dmasound.mach.default_soft ; | |
1198 | dmasound.hard = dmasound.mach.default_hard ; | |
1199 | dmasound.dsp = dmasound.mach.default_soft ; | |
1200 | shared_resources_initialised = 0 ; | |
1201 | } | |
1202 | return 0 ; | |
1203 | } | |
1204 | ||
1205 | ||
1206 | /* | |
1207 | * /dev/sndstat | |
1208 | */ | |
1209 | ||
1210 | /* we allow more space for record-enabled because there are extra output lines. | |
1211 | the number here must include the amount we are prepared to give to the low-level | |
1212 | driver. | |
1213 | */ | |
1214 | ||
1da177e4 | 1215 | #define STAT_BUFF_LEN 768 |
1da177e4 LT |
1216 | |
1217 | /* this is how much space we will allow the low-level driver to use | |
1218 | in the stat buffer. Currently, 2 * (80 character line + <NL>). | |
1219 | We do not police this (it is up to the ll driver to be honest). | |
1220 | */ | |
1221 | ||
1222 | #define LOW_LEVEL_STAT_ALLOC 162 | |
1223 | ||
1224 | static struct { | |
1225 | int busy; | |
1226 | char buf[STAT_BUFF_LEN]; /* state.buf should not overflow! */ | |
1227 | int len, ptr; | |
1228 | } state; | |
1229 | ||
1230 | /* publish this function for use by low-level code, if required */ | |
1231 | ||
0a1b42db | 1232 | static char *get_afmt_string(int afmt) |
1da177e4 LT |
1233 | { |
1234 | switch(afmt) { | |
1235 | case AFMT_MU_LAW: | |
1236 | return "mu-law"; | |
1237 | break; | |
1238 | case AFMT_A_LAW: | |
1239 | return "A-law"; | |
1240 | break; | |
1241 | case AFMT_U8: | |
1242 | return "unsigned 8 bit"; | |
1243 | break; | |
1244 | case AFMT_S8: | |
1245 | return "signed 8 bit"; | |
1246 | break; | |
1247 | case AFMT_S16_BE: | |
1248 | return "signed 16 bit BE"; | |
1249 | break; | |
1250 | case AFMT_U16_BE: | |
1251 | return "unsigned 16 bit BE"; | |
1252 | break; | |
1253 | case AFMT_S16_LE: | |
1254 | return "signed 16 bit LE"; | |
1255 | break; | |
1256 | case AFMT_U16_LE: | |
1257 | return "unsigned 16 bit LE"; | |
1258 | break; | |
1259 | case 0: | |
1260 | return "format not set" ; | |
1261 | break ; | |
1262 | default: | |
1263 | break ; | |
1264 | } | |
1265 | return "ERROR: Unsupported AFMT_XXXX code" ; | |
1266 | } | |
1267 | ||
1268 | static int state_open(struct inode *inode, struct file *file) | |
1269 | { | |
1270 | char *buffer = state.buf; | |
1271 | int len = 0; | |
90dc763f | 1272 | int ret; |
1da177e4 | 1273 | |
645ef9ef | 1274 | mutex_lock(&dmasound_core_mutex); |
90dc763f | 1275 | ret = -EBUSY; |
1da177e4 | 1276 | if (state.busy) |
90dc763f | 1277 | goto out; |
1da177e4 | 1278 | |
90dc763f | 1279 | ret = -ENODEV; |
1da177e4 | 1280 | if (!try_module_get(dmasound.mach.owner)) |
90dc763f AB |
1281 | goto out; |
1282 | ||
1da177e4 LT |
1283 | state.ptr = 0; |
1284 | state.busy = 1; | |
1285 | ||
1286 | len += sprintf(buffer+len, "%sDMA sound driver rev %03d :\n", | |
1287 | dmasound.mach.name, (DMASOUND_CORE_REVISION<<4) + | |
1288 | ((dmasound.mach.version>>8) & 0x0f)); | |
1289 | len += sprintf(buffer+len, | |
1290 | "Core driver edition %02d.%02d : %s driver edition %02d.%02d\n", | |
1291 | DMASOUND_CORE_REVISION, DMASOUND_CORE_EDITION, dmasound.mach.name2, | |
1292 | (dmasound.mach.version >> 8), (dmasound.mach.version & 0xff)) ; | |
1293 | ||
1294 | /* call the low-level module to fill in any stat info. that it has | |
1295 | if present. Maximum buffer usage is specified. | |
1296 | */ | |
1297 | ||
1298 | if (dmasound.mach.state_info) | |
1299 | len += dmasound.mach.state_info(buffer+len, | |
1300 | (size_t) LOW_LEVEL_STAT_ALLOC) ; | |
1301 | ||
1302 | /* make usage of the state buffer as deterministic as poss. | |
1303 | exceptional conditions could cause overrun - and this is flagged as | |
1304 | a kernel error. | |
1305 | */ | |
1306 | ||
1307 | /* formats and settings */ | |
1308 | ||
1309 | len += sprintf(buffer+len,"\t\t === Formats & settings ===\n") ; | |
1310 | len += sprintf(buffer+len,"Parameter %20s%20s\n","soft","hard") ; | |
1311 | len += sprintf(buffer+len,"Format :%20s%20s\n", | |
1312 | get_afmt_string(dmasound.soft.format), | |
1313 | get_afmt_string(dmasound.hard.format)); | |
1314 | ||
1315 | len += sprintf(buffer+len,"Samp Rate:%14d s/sec%14d s/sec\n", | |
1316 | dmasound.soft.speed, dmasound.hard.speed); | |
1317 | ||
1318 | len += sprintf(buffer+len,"Channels :%20s%20s\n", | |
1319 | dmasound.soft.stereo ? "stereo" : "mono", | |
1320 | dmasound.hard.stereo ? "stereo" : "mono" ); | |
1321 | ||
1322 | /* sound queue status */ | |
1323 | ||
1324 | len += sprintf(buffer+len,"\t\t === Sound Queue status ===\n"); | |
1325 | len += sprintf(buffer+len,"Allocated:%8s%6s\n","Buffers","Size") ; | |
1326 | len += sprintf(buffer+len,"%9s:%8d%6d\n", | |
1327 | "write", write_sq.numBufs, write_sq.bufSize) ; | |
1da177e4 LT |
1328 | len += sprintf(buffer+len, |
1329 | "Current : MaxFrg FragSiz MaxAct Frnt Rear " | |
1330 | "Cnt RrSize A B S L xruns\n") ; | |
1331 | len += sprintf(buffer+len,"%9s:%7d%8d%7d%5d%5d%4d%7d%2d%2d%2d%2d%7d\n", | |
1332 | "write", write_sq.max_count, write_sq.block_size, | |
1333 | write_sq.max_active, write_sq.front, write_sq.rear, | |
1334 | write_sq.count, write_sq.rear_size, write_sq.active, | |
1335 | write_sq.busy, write_sq.syncing, write_sq.locked, write_sq.xruns) ; | |
1da177e4 LT |
1336 | #ifdef DEBUG_DMASOUND |
1337 | printk("dmasound: stat buffer used %d bytes\n", len) ; | |
1338 | #endif | |
1339 | ||
1340 | if (len >= STAT_BUFF_LEN) | |
1341 | printk(KERN_ERR "dmasound_core: stat buffer overflowed!\n"); | |
1342 | ||
1343 | state.len = len; | |
90dc763f AB |
1344 | ret = 0; |
1345 | out: | |
645ef9ef | 1346 | mutex_unlock(&dmasound_core_mutex); |
90dc763f | 1347 | return ret; |
1da177e4 LT |
1348 | } |
1349 | ||
1350 | static int state_release(struct inode *inode, struct file *file) | |
1351 | { | |
645ef9ef | 1352 | mutex_lock(&dmasound_core_mutex); |
1da177e4 LT |
1353 | state.busy = 0; |
1354 | module_put(dmasound.mach.owner); | |
645ef9ef | 1355 | mutex_unlock(&dmasound_core_mutex); |
1da177e4 LT |
1356 | return 0; |
1357 | } | |
1358 | ||
1359 | static ssize_t state_read(struct file *file, char __user *buf, size_t count, | |
1360 | loff_t *ppos) | |
1361 | { | |
1362 | int n = state.len - state.ptr; | |
1363 | if (n > count) | |
1364 | n = count; | |
1365 | if (n <= 0) | |
1366 | return 0; | |
1367 | if (copy_to_user(buf, &state.buf[state.ptr], n)) | |
1368 | return -EFAULT; | |
1369 | state.ptr += n; | |
1370 | return n; | |
1371 | } | |
1372 | ||
9c2e08c5 | 1373 | static const struct file_operations state_fops = { |
1da177e4 LT |
1374 | .owner = THIS_MODULE, |
1375 | .llseek = no_llseek, | |
1376 | .read = state_read, | |
1377 | .open = state_open, | |
1378 | .release = state_release, | |
1379 | }; | |
1380 | ||
1381 | static int state_init(void) | |
1382 | { | |
1383 | #ifndef MODULE | |
1384 | int state_unit; | |
1385 | #endif | |
1386 | state_unit = register_sound_special(&state_fops, SND_DEV_STATUS); | |
1387 | if (state_unit < 0) | |
1388 | return state_unit ; | |
1389 | state.busy = 0; | |
1390 | return 0 ; | |
1391 | } | |
1392 | ||
1393 | ||
1394 | /* | |
1395 | * Config & Setup | |
1396 | * | |
1397 | * This function is called by _one_ chipset-specific driver | |
1398 | */ | |
1399 | ||
1400 | int dmasound_init(void) | |
1401 | { | |
1402 | int res ; | |
1403 | #ifdef MODULE | |
1404 | if (irq_installed) | |
1405 | return -EBUSY; | |
1406 | #endif | |
1407 | ||
1408 | /* Set up sound queue, /dev/audio and /dev/dsp. */ | |
1409 | ||
1410 | /* Set default settings. */ | |
1411 | if ((res = sq_init()) < 0) | |
1412 | return res ; | |
1413 | ||
1414 | /* Set up /dev/sndstat. */ | |
1415 | if ((res = state_init()) < 0) | |
1416 | return res ; | |
1417 | ||
1418 | /* Set up /dev/mixer. */ | |
1419 | mixer_init(); | |
1420 | ||
1421 | if (!dmasound.mach.irqinit()) { | |
1422 | printk(KERN_ERR "DMA sound driver: Interrupt initialization failed\n"); | |
1423 | return -ENODEV; | |
1424 | } | |
1425 | #ifdef MODULE | |
1426 | irq_installed = 1; | |
1427 | #endif | |
1428 | ||
1429 | printk(KERN_INFO "%s DMA sound driver rev %03d installed\n", | |
1430 | dmasound.mach.name, (DMASOUND_CORE_REVISION<<4) + | |
1431 | ((dmasound.mach.version>>8) & 0x0f)); | |
1432 | printk(KERN_INFO | |
1433 | "Core driver edition %02d.%02d : %s driver edition %02d.%02d\n", | |
1434 | DMASOUND_CORE_REVISION, DMASOUND_CORE_EDITION, dmasound.mach.name2, | |
1435 | (dmasound.mach.version >> 8), (dmasound.mach.version & 0xff)) ; | |
1436 | printk(KERN_INFO "Write will use %4d fragments of %7d bytes as default\n", | |
1437 | numWriteBufs, writeBufSize) ; | |
1da177e4 LT |
1438 | return 0; |
1439 | } | |
1440 | ||
1441 | #ifdef MODULE | |
1442 | ||
1443 | void dmasound_deinit(void) | |
1444 | { | |
1445 | if (irq_installed) { | |
1446 | sound_silence(); | |
1447 | dmasound.mach.irqcleanup(); | |
1448 | irq_installed = 0; | |
1449 | } | |
1450 | ||
1451 | write_sq_release_buffers(); | |
1da177e4 LT |
1452 | |
1453 | if (mixer_unit >= 0) | |
1454 | unregister_sound_mixer(mixer_unit); | |
1455 | if (state_unit >= 0) | |
1456 | unregister_sound_special(state_unit); | |
1457 | if (sq_unit >= 0) | |
1458 | unregister_sound_dsp(sq_unit); | |
1459 | } | |
1460 | ||
1461 | #else /* !MODULE */ | |
1462 | ||
1463 | static int dmasound_setup(char *str) | |
1464 | { | |
1465 | int ints[6], size; | |
1466 | ||
1467 | str = get_options(str, ARRAY_SIZE(ints), ints); | |
1468 | ||
1469 | /* check the bootstrap parameter for "dmasound=" */ | |
1470 | ||
1471 | /* FIXME: other than in the most naive of cases there is no sense in these | |
1472 | * buffers being other than powers of two. This is not checked yet. | |
1473 | */ | |
1474 | ||
1475 | switch (ints[0]) { | |
1da177e4 LT |
1476 | case 3: |
1477 | if ((ints[3] < 0) || (ints[3] > MAX_CATCH_RADIUS)) | |
1478 | printk("dmasound_setup: invalid catch radius, using default = %d\n", catchRadius); | |
1479 | else | |
1480 | catchRadius = ints[3]; | |
c0dbbdad | 1481 | fallthrough; |
1da177e4 LT |
1482 | case 2: |
1483 | if (ints[1] < MIN_BUFFERS) | |
1484 | printk("dmasound_setup: invalid number of buffers, using default = %d\n", numWriteBufs); | |
1485 | else | |
1486 | numWriteBufs = ints[1]; | |
c0dbbdad | 1487 | fallthrough; |
1da177e4 LT |
1488 | case 1: |
1489 | if ((size = ints[2]) < 256) /* check for small buffer specs */ | |
1490 | size <<= 10 ; | |
1491 | if (size < MIN_BUFSIZE || size > MAX_BUFSIZE) | |
1492 | printk("dmasound_setup: invalid write buffer size, using default = %d\n", writeBufSize); | |
1493 | else | |
1494 | writeBufSize = size; | |
1495 | case 0: | |
1496 | break; | |
1497 | default: | |
1498 | printk("dmasound_setup: invalid number of arguments\n"); | |
1499 | return 0; | |
1500 | } | |
1501 | return 1; | |
1502 | } | |
1503 | ||
1504 | __setup("dmasound=", dmasound_setup); | |
1505 | ||
1506 | #endif /* !MODULE */ | |
1507 | ||
1508 | /* | |
1509 | * Conversion tables | |
1510 | */ | |
1511 | ||
1512 | #ifdef HAS_8BIT_TABLES | |
1513 | /* 8 bit mu-law */ | |
1514 | ||
1515 | char dmasound_ulaw2dma8[] = { | |
1516 | -126, -122, -118, -114, -110, -106, -102, -98, | |
1517 | -94, -90, -86, -82, -78, -74, -70, -66, | |
1518 | -63, -61, -59, -57, -55, -53, -51, -49, | |
1519 | -47, -45, -43, -41, -39, -37, -35, -33, | |
1520 | -31, -30, -29, -28, -27, -26, -25, -24, | |
1521 | -23, -22, -21, -20, -19, -18, -17, -16, | |
1522 | -16, -15, -15, -14, -14, -13, -13, -12, | |
1523 | -12, -11, -11, -10, -10, -9, -9, -8, | |
1524 | -8, -8, -7, -7, -7, -7, -6, -6, | |
1525 | -6, -6, -5, -5, -5, -5, -4, -4, | |
1526 | -4, -4, -4, -4, -3, -3, -3, -3, | |
1527 | -3, -3, -3, -3, -2, -2, -2, -2, | |
1528 | -2, -2, -2, -2, -2, -2, -2, -2, | |
1529 | -1, -1, -1, -1, -1, -1, -1, -1, | |
1530 | -1, -1, -1, -1, -1, -1, -1, -1, | |
1531 | -1, -1, -1, -1, -1, -1, -1, 0, | |
1532 | 125, 121, 117, 113, 109, 105, 101, 97, | |
1533 | 93, 89, 85, 81, 77, 73, 69, 65, | |
1534 | 62, 60, 58, 56, 54, 52, 50, 48, | |
1535 | 46, 44, 42, 40, 38, 36, 34, 32, | |
1536 | 30, 29, 28, 27, 26, 25, 24, 23, | |
1537 | 22, 21, 20, 19, 18, 17, 16, 15, | |
1538 | 15, 14, 14, 13, 13, 12, 12, 11, | |
1539 | 11, 10, 10, 9, 9, 8, 8, 7, | |
1540 | 7, 7, 6, 6, 6, 6, 5, 5, | |
1541 | 5, 5, 4, 4, 4, 4, 3, 3, | |
1542 | 3, 3, 3, 3, 2, 2, 2, 2, | |
1543 | 2, 2, 2, 2, 1, 1, 1, 1, | |
1544 | 1, 1, 1, 1, 1, 1, 1, 1, | |
1545 | 0, 0, 0, 0, 0, 0, 0, 0, | |
1546 | 0, 0, 0, 0, 0, 0, 0, 0, | |
1547 | 0, 0, 0, 0, 0, 0, 0, 0 | |
1548 | }; | |
1549 | ||
1550 | /* 8 bit A-law */ | |
1551 | ||
1552 | char dmasound_alaw2dma8[] = { | |
1553 | -22, -21, -24, -23, -18, -17, -20, -19, | |
1554 | -30, -29, -32, -31, -26, -25, -28, -27, | |
1555 | -11, -11, -12, -12, -9, -9, -10, -10, | |
1556 | -15, -15, -16, -16, -13, -13, -14, -14, | |
1557 | -86, -82, -94, -90, -70, -66, -78, -74, | |
1558 | -118, -114, -126, -122, -102, -98, -110, -106, | |
1559 | -43, -41, -47, -45, -35, -33, -39, -37, | |
1560 | -59, -57, -63, -61, -51, -49, -55, -53, | |
1561 | -2, -2, -2, -2, -2, -2, -2, -2, | |
1562 | -2, -2, -2, -2, -2, -2, -2, -2, | |
1563 | -1, -1, -1, -1, -1, -1, -1, -1, | |
1564 | -1, -1, -1, -1, -1, -1, -1, -1, | |
1565 | -6, -6, -6, -6, -5, -5, -5, -5, | |
1566 | -8, -8, -8, -8, -7, -7, -7, -7, | |
1567 | -3, -3, -3, -3, -3, -3, -3, -3, | |
1568 | -4, -4, -4, -4, -4, -4, -4, -4, | |
1569 | 21, 20, 23, 22, 17, 16, 19, 18, | |
1570 | 29, 28, 31, 30, 25, 24, 27, 26, | |
1571 | 10, 10, 11, 11, 8, 8, 9, 9, | |
1572 | 14, 14, 15, 15, 12, 12, 13, 13, | |
1573 | 86, 82, 94, 90, 70, 66, 78, 74, | |
1574 | 118, 114, 126, 122, 102, 98, 110, 106, | |
1575 | 43, 41, 47, 45, 35, 33, 39, 37, | |
1576 | 59, 57, 63, 61, 51, 49, 55, 53, | |
1577 | 1, 1, 1, 1, 1, 1, 1, 1, | |
1578 | 1, 1, 1, 1, 1, 1, 1, 1, | |
1579 | 0, 0, 0, 0, 0, 0, 0, 0, | |
1580 | 0, 0, 0, 0, 0, 0, 0, 0, | |
1581 | 5, 5, 5, 5, 4, 4, 4, 4, | |
1582 | 7, 7, 7, 7, 6, 6, 6, 6, | |
1583 | 2, 2, 2, 2, 2, 2, 2, 2, | |
1584 | 3, 3, 3, 3, 3, 3, 3, 3 | |
1585 | }; | |
1586 | #endif /* HAS_8BIT_TABLES */ | |
1587 | ||
1588 | /* | |
1589 | * Visible symbols for modules | |
1590 | */ | |
1591 | ||
1592 | EXPORT_SYMBOL(dmasound); | |
1593 | EXPORT_SYMBOL(dmasound_init); | |
1594 | #ifdef MODULE | |
1595 | EXPORT_SYMBOL(dmasound_deinit); | |
1596 | #endif | |
1597 | EXPORT_SYMBOL(dmasound_write_sq); | |
1da177e4 LT |
1598 | EXPORT_SYMBOL(dmasound_catchRadius); |
1599 | #ifdef HAS_8BIT_TABLES | |
1600 | EXPORT_SYMBOL(dmasound_ulaw2dma8); | |
1601 | EXPORT_SYMBOL(dmasound_alaw2dma8); | |
1602 | #endif |