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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> | |
184 | #include <linux/smp_lock.h> | |
185 | ||
186 | #include <asm/uaccess.h> | |
187 | ||
188 | #include "dmasound.h" | |
189 | ||
190 | #define DMASOUND_CORE_REVISION 1 | |
191 | #define DMASOUND_CORE_EDITION 6 | |
192 | ||
193 | /* | |
194 | * Declarations | |
195 | */ | |
196 | ||
197 | int dmasound_catchRadius = 0; | |
8d3b33f6 | 198 | module_param(dmasound_catchRadius, int, 0); |
1da177e4 LT |
199 | |
200 | static unsigned int numWriteBufs = DEFAULT_N_BUFFERS; | |
8d3b33f6 | 201 | module_param(numWriteBufs, int, 0); |
1da177e4 | 202 | static unsigned int writeBufSize = DEFAULT_BUFF_SIZE ; /* in bytes */ |
8d3b33f6 | 203 | module_param(writeBufSize, int, 0); |
1da177e4 | 204 | |
1da177e4 LT |
205 | MODULE_LICENSE("GPL"); |
206 | ||
207 | #ifdef MODULE | |
208 | static int sq_unit = -1; | |
209 | static int mixer_unit = -1; | |
210 | static int state_unit = -1; | |
211 | static int irq_installed; | |
212 | #endif /* MODULE */ | |
213 | ||
1da177e4 | 214 | /* control over who can modify resources shared between play/record */ |
aeb5d727 | 215 | static fmode_t shared_resource_owner; |
1da177e4 LT |
216 | static int shared_resources_initialised; |
217 | ||
218 | /* | |
219 | * Mid level stuff | |
220 | */ | |
221 | ||
222 | struct sound_settings dmasound = { .lock = SPIN_LOCK_UNLOCKED }; | |
223 | ||
224 | static inline void sound_silence(void) | |
225 | { | |
226 | dmasound.mach.silence(); /* _MUST_ stop DMA */ | |
227 | } | |
228 | ||
229 | static inline int sound_set_format(int format) | |
230 | { | |
231 | return dmasound.mach.setFormat(format); | |
232 | } | |
233 | ||
234 | ||
235 | static int sound_set_speed(int speed) | |
236 | { | |
237 | if (speed < 0) | |
238 | return dmasound.soft.speed; | |
239 | ||
240 | /* trap out-of-range speed settings. | |
241 | at present we allow (arbitrarily) low rates - using soft | |
242 | up-conversion - but we can't allow > max because there is | |
243 | no soft down-conversion. | |
244 | */ | |
245 | if (dmasound.mach.max_dsp_speed && | |
246 | (speed > dmasound.mach.max_dsp_speed)) | |
247 | speed = dmasound.mach.max_dsp_speed ; | |
248 | ||
249 | dmasound.soft.speed = speed; | |
250 | ||
251 | if (dmasound.minDev == SND_DEV_DSP) | |
252 | dmasound.dsp.speed = dmasound.soft.speed; | |
253 | ||
254 | return dmasound.soft.speed; | |
255 | } | |
256 | ||
257 | static int sound_set_stereo(int stereo) | |
258 | { | |
259 | if (stereo < 0) | |
260 | return dmasound.soft.stereo; | |
261 | ||
262 | stereo = !!stereo; /* should be 0 or 1 now */ | |
263 | ||
264 | dmasound.soft.stereo = stereo; | |
265 | if (dmasound.minDev == SND_DEV_DSP) | |
266 | dmasound.dsp.stereo = stereo; | |
267 | ||
268 | return stereo; | |
269 | } | |
270 | ||
271 | static ssize_t sound_copy_translate(TRANS *trans, const u_char __user *userPtr, | |
272 | size_t userCount, u_char frame[], | |
273 | ssize_t *frameUsed, ssize_t frameLeft) | |
274 | { | |
275 | ssize_t (*ct_func)(const u_char __user *, size_t, u_char *, ssize_t *, ssize_t); | |
276 | ||
277 | switch (dmasound.soft.format) { | |
278 | case AFMT_MU_LAW: | |
279 | ct_func = trans->ct_ulaw; | |
280 | break; | |
281 | case AFMT_A_LAW: | |
282 | ct_func = trans->ct_alaw; | |
283 | break; | |
284 | case AFMT_S8: | |
285 | ct_func = trans->ct_s8; | |
286 | break; | |
287 | case AFMT_U8: | |
288 | ct_func = trans->ct_u8; | |
289 | break; | |
290 | case AFMT_S16_BE: | |
291 | ct_func = trans->ct_s16be; | |
292 | break; | |
293 | case AFMT_U16_BE: | |
294 | ct_func = trans->ct_u16be; | |
295 | break; | |
296 | case AFMT_S16_LE: | |
297 | ct_func = trans->ct_s16le; | |
298 | break; | |
299 | case AFMT_U16_LE: | |
300 | ct_func = trans->ct_u16le; | |
301 | break; | |
302 | default: | |
303 | return 0; | |
304 | } | |
305 | /* if the user has requested a non-existent translation don't try | |
306 | to call it but just return 0 bytes moved | |
307 | */ | |
308 | if (ct_func) | |
309 | return ct_func(userPtr, userCount, frame, frameUsed, frameLeft); | |
310 | return 0; | |
311 | } | |
312 | ||
313 | /* | |
314 | * /dev/mixer abstraction | |
315 | */ | |
316 | ||
317 | static struct { | |
318 | int busy; | |
319 | int modify_counter; | |
320 | } mixer; | |
321 | ||
322 | static int mixer_open(struct inode *inode, struct file *file) | |
323 | { | |
324 | if (!try_module_get(dmasound.mach.owner)) | |
325 | return -ENODEV; | |
326 | mixer.busy = 1; | |
327 | return 0; | |
328 | } | |
329 | ||
330 | static int mixer_release(struct inode *inode, struct file *file) | |
331 | { | |
332 | lock_kernel(); | |
333 | mixer.busy = 0; | |
334 | module_put(dmasound.mach.owner); | |
335 | unlock_kernel(); | |
336 | return 0; | |
337 | } | |
338 | static int mixer_ioctl(struct inode *inode, struct file *file, u_int cmd, | |
339 | u_long arg) | |
340 | { | |
341 | if (_SIOC_DIR(cmd) & _SIOC_WRITE) | |
342 | mixer.modify_counter++; | |
343 | switch (cmd) { | |
344 | case OSS_GETVERSION: | |
345 | return IOCTL_OUT(arg, SOUND_VERSION); | |
346 | case SOUND_MIXER_INFO: | |
347 | { | |
348 | mixer_info info; | |
349 | memset(&info, 0, sizeof(info)); | |
350 | strlcpy(info.id, dmasound.mach.name2, sizeof(info.id)); | |
351 | strlcpy(info.name, dmasound.mach.name2, sizeof(info.name)); | |
352 | info.modify_counter = mixer.modify_counter; | |
353 | if (copy_to_user((void __user *)arg, &info, sizeof(info))) | |
354 | return -EFAULT; | |
355 | return 0; | |
356 | } | |
357 | } | |
358 | if (dmasound.mach.mixer_ioctl) | |
359 | return dmasound.mach.mixer_ioctl(cmd, arg); | |
360 | return -EINVAL; | |
361 | } | |
362 | ||
9c2e08c5 | 363 | static const struct file_operations mixer_fops = |
1da177e4 LT |
364 | { |
365 | .owner = THIS_MODULE, | |
366 | .llseek = no_llseek, | |
367 | .ioctl = mixer_ioctl, | |
368 | .open = mixer_open, | |
369 | .release = mixer_release, | |
370 | }; | |
371 | ||
372 | static void mixer_init(void) | |
373 | { | |
374 | #ifndef MODULE | |
375 | int mixer_unit; | |
376 | #endif | |
377 | mixer_unit = register_sound_mixer(&mixer_fops, -1); | |
378 | if (mixer_unit < 0) | |
379 | return; | |
380 | ||
381 | mixer.busy = 0; | |
382 | dmasound.treble = 0; | |
383 | dmasound.bass = 0; | |
384 | if (dmasound.mach.mixer_init) | |
385 | dmasound.mach.mixer_init(); | |
386 | } | |
387 | ||
388 | ||
389 | /* | |
390 | * Sound queue stuff, the heart of the driver | |
391 | */ | |
392 | ||
393 | struct sound_queue dmasound_write_sq; | |
394 | static void sq_reset_output(void) ; | |
1da177e4 LT |
395 | |
396 | static int sq_allocate_buffers(struct sound_queue *sq, int num, int size) | |
397 | { | |
398 | int i; | |
399 | ||
400 | if (sq->buffers) | |
401 | return 0; | |
402 | sq->numBufs = num; | |
403 | sq->bufSize = size; | |
404 | sq->buffers = kmalloc (num * sizeof(char *), GFP_KERNEL); | |
405 | if (!sq->buffers) | |
406 | return -ENOMEM; | |
407 | for (i = 0; i < num; i++) { | |
408 | sq->buffers[i] = dmasound.mach.dma_alloc(size, GFP_KERNEL); | |
409 | if (!sq->buffers[i]) { | |
410 | while (i--) | |
411 | dmasound.mach.dma_free(sq->buffers[i], size); | |
412 | kfree(sq->buffers); | |
413 | sq->buffers = NULL; | |
414 | return -ENOMEM; | |
415 | } | |
416 | } | |
417 | return 0; | |
418 | } | |
419 | ||
420 | static void sq_release_buffers(struct sound_queue *sq) | |
421 | { | |
422 | int i; | |
423 | ||
424 | if (sq->buffers) { | |
425 | for (i = 0; i < sq->numBufs; i++) | |
426 | dmasound.mach.dma_free(sq->buffers[i], sq->bufSize); | |
427 | kfree(sq->buffers); | |
428 | sq->buffers = NULL; | |
429 | } | |
430 | } | |
431 | ||
432 | ||
433 | static int sq_setup(struct sound_queue *sq) | |
434 | { | |
435 | int (*setup_func)(void) = NULL; | |
436 | int hard_frame ; | |
437 | ||
438 | if (sq->locked) { /* are we already set? - and not changeable */ | |
439 | #ifdef DEBUG_DMASOUND | |
440 | printk("dmasound_core: tried to sq_setup a locked queue\n") ; | |
441 | #endif | |
442 | return -EINVAL ; | |
443 | } | |
444 | sq->locked = 1 ; /* don't think we have a race prob. here _check_ */ | |
445 | ||
446 | /* make sure that the parameters are set up | |
447 | This should have been done already... | |
448 | */ | |
449 | ||
450 | dmasound.mach.init(); | |
451 | ||
452 | /* OK. If the user has set fragment parameters explicitly, then we | |
453 | should leave them alone... as long as they are valid. | |
454 | Invalid user fragment params can occur if we allow the whole buffer | |
455 | to be used when the user requests the fragments sizes (with no soft | |
456 | x-lation) and then the user subsequently sets a soft x-lation that | |
457 | requires increased internal buffering. | |
458 | ||
459 | Othwerwise (if the user did not set them) OSS says that we should | |
460 | select frag params on the basis of 0.5 s output & 0.1 s input | |
461 | latency. (TODO. For now we will copy in the defaults.) | |
462 | */ | |
463 | ||
464 | if (sq->user_frags <= 0) { | |
465 | sq->max_count = sq->numBufs ; | |
466 | sq->max_active = sq->numBufs ; | |
467 | sq->block_size = sq->bufSize; | |
468 | /* set up the user info */ | |
469 | sq->user_frags = sq->numBufs ; | |
470 | sq->user_frag_size = sq->bufSize ; | |
471 | sq->user_frag_size *= | |
472 | (dmasound.soft.size * (dmasound.soft.stereo+1) ) ; | |
473 | sq->user_frag_size /= | |
474 | (dmasound.hard.size * (dmasound.hard.stereo+1) ) ; | |
475 | } else { | |
476 | /* work out requested block size */ | |
477 | sq->block_size = sq->user_frag_size ; | |
478 | sq->block_size *= | |
479 | (dmasound.hard.size * (dmasound.hard.stereo+1) ) ; | |
480 | sq->block_size /= | |
481 | (dmasound.soft.size * (dmasound.soft.stereo+1) ) ; | |
482 | /* the user wants to write frag-size chunks */ | |
483 | sq->block_size *= dmasound.hard.speed ; | |
484 | sq->block_size /= dmasound.soft.speed ; | |
485 | /* this only works for size values which are powers of 2 */ | |
486 | hard_frame = | |
487 | (dmasound.hard.size * (dmasound.hard.stereo+1))/8 ; | |
488 | sq->block_size += (hard_frame - 1) ; | |
489 | sq->block_size &= ~(hard_frame - 1) ; /* make sure we are aligned */ | |
490 | /* let's just check for obvious mistakes */ | |
491 | if ( sq->block_size <= 0 || sq->block_size > sq->bufSize) { | |
492 | #ifdef DEBUG_DMASOUND | |
493 | printk("dmasound_core: invalid frag size (user set %d)\n", sq->user_frag_size) ; | |
494 | #endif | |
495 | sq->block_size = sq->bufSize ; | |
496 | } | |
497 | if ( sq->user_frags <= sq->numBufs ) { | |
498 | sq->max_count = sq->user_frags ; | |
499 | /* if user has set max_active - then use it */ | |
500 | sq->max_active = (sq->max_active <= sq->max_count) ? | |
501 | sq->max_active : sq->max_count ; | |
502 | } else { | |
503 | #ifdef DEBUG_DMASOUND | |
504 | printk("dmasound_core: invalid frag count (user set %d)\n", sq->user_frags) ; | |
505 | #endif | |
506 | sq->max_count = | |
507 | sq->max_active = sq->numBufs ; | |
508 | } | |
509 | } | |
510 | sq->front = sq->count = sq->rear_size = 0; | |
511 | sq->syncing = 0; | |
512 | sq->active = 0; | |
513 | ||
514 | if (sq == &write_sq) { | |
515 | sq->rear = -1; | |
516 | setup_func = dmasound.mach.write_sq_setup; | |
517 | } | |
1da177e4 LT |
518 | if (setup_func) |
519 | return setup_func(); | |
520 | return 0 ; | |
521 | } | |
522 | ||
523 | static inline void sq_play(void) | |
524 | { | |
525 | dmasound.mach.play(); | |
526 | } | |
527 | ||
528 | static ssize_t sq_write(struct file *file, const char __user *src, size_t uLeft, | |
529 | loff_t *ppos) | |
530 | { | |
531 | ssize_t uWritten = 0; | |
532 | u_char *dest; | |
533 | ssize_t uUsed = 0, bUsed, bLeft; | |
534 | unsigned long flags ; | |
535 | ||
536 | /* ++TeSche: Is something like this necessary? | |
537 | * Hey, that's an honest question! Or does any other part of the | |
538 | * filesystem already checks this situation? I really don't know. | |
539 | */ | |
540 | if (uLeft == 0) | |
541 | return 0; | |
542 | ||
543 | /* implement any changes we have made to the soft/hard params. | |
544 | this is not satisfactory really, all we have done up to now is to | |
545 | say what we would like - there hasn't been any real checking of capability | |
546 | */ | |
547 | ||
548 | if (shared_resources_initialised == 0) { | |
549 | dmasound.mach.init() ; | |
550 | shared_resources_initialised = 1 ; | |
551 | } | |
552 | ||
553 | /* set up the sq if it is not already done. This may seem a dumb place | |
554 | to do it - but it is what OSS requires. It means that write() can | |
555 | return memory allocation errors. To avoid this possibility use the | |
556 | GETBLKSIZE or GETOSPACE ioctls (after you've fiddled with all the | |
557 | params you want to change) - these ioctls also force the setup. | |
558 | */ | |
559 | ||
560 | if (write_sq.locked == 0) { | |
561 | if ((uWritten = sq_setup(&write_sq)) < 0) return uWritten ; | |
562 | uWritten = 0 ; | |
563 | } | |
564 | ||
565 | /* FIXME: I think that this may be the wrong behaviour when we get strapped | |
566 | for time and the cpu is close to being (or actually) behind in sending data. | |
567 | - because we've lost the time that the N samples, already in the buffer, | |
568 | would have given us to get here with the next lot from the user. | |
569 | */ | |
570 | /* The interrupt doesn't start to play the last, incomplete frame. | |
571 | * Thus we can append to it without disabling the interrupts! (Note | |
572 | * also that write_sq.rear isn't affected by the interrupt.) | |
573 | */ | |
574 | ||
575 | /* as of 1.6 this behaviour changes if SNDCTL_DSP_POST has been issued: | |
576 | this will mimic the behaviour of syncing and allow the sq_play() to | |
577 | queue a partial fragment. Since sq_play() may/will be called from | |
578 | the IRQ handler - at least on Pmac we have to deal with it. | |
579 | The strategy - possibly not optimum - is to kill _POST status if we | |
580 | get here. This seems, at least, reasonable - in the sense that POST | |
581 | is supposed to indicate that we might not write before the queue | |
582 | is drained - and if we get here in time then it does not apply. | |
583 | */ | |
584 | ||
585 | spin_lock_irqsave(&dmasound.lock, flags); | |
586 | write_sq.syncing &= ~2 ; /* take out POST status */ | |
587 | spin_unlock_irqrestore(&dmasound.lock, flags); | |
588 | ||
589 | if (write_sq.count > 0 && | |
590 | (bLeft = write_sq.block_size-write_sq.rear_size) > 0) { | |
591 | dest = write_sq.buffers[write_sq.rear]; | |
592 | bUsed = write_sq.rear_size; | |
593 | uUsed = sound_copy_translate(dmasound.trans_write, src, uLeft, | |
594 | dest, &bUsed, bLeft); | |
595 | if (uUsed <= 0) | |
596 | return uUsed; | |
597 | src += uUsed; | |
598 | uWritten += uUsed; | |
599 | uLeft = (uUsed <= uLeft) ? (uLeft - uUsed) : 0 ; /* paranoia */ | |
600 | write_sq.rear_size = bUsed; | |
601 | } | |
602 | ||
603 | while (uLeft) { | |
604 | while (write_sq.count >= write_sq.max_active) { | |
605 | sq_play(); | |
4b30fbde | 606 | if (write_sq.non_blocking) |
1da177e4 LT |
607 | return uWritten > 0 ? uWritten : -EAGAIN; |
608 | SLEEP(write_sq.action_queue); | |
609 | if (signal_pending(current)) | |
610 | return uWritten > 0 ? uWritten : -EINTR; | |
611 | } | |
612 | ||
613 | /* Here, we can avoid disabling the interrupt by first | |
614 | * copying and translating the data, and then updating | |
615 | * the write_sq variables. Until this is done, the interrupt | |
616 | * won't see the new frame and we can work on it | |
617 | * undisturbed. | |
618 | */ | |
619 | ||
620 | dest = write_sq.buffers[(write_sq.rear+1) % write_sq.max_count]; | |
621 | bUsed = 0; | |
622 | bLeft = write_sq.block_size; | |
623 | uUsed = sound_copy_translate(dmasound.trans_write, src, uLeft, | |
624 | dest, &bUsed, bLeft); | |
625 | if (uUsed <= 0) | |
626 | break; | |
627 | src += uUsed; | |
628 | uWritten += uUsed; | |
629 | uLeft = (uUsed <= uLeft) ? (uLeft - uUsed) : 0 ; /* paranoia */ | |
630 | if (bUsed) { | |
631 | write_sq.rear = (write_sq.rear+1) % write_sq.max_count; | |
632 | write_sq.rear_size = bUsed; | |
633 | write_sq.count++; | |
634 | } | |
635 | } /* uUsed may have been 0 */ | |
636 | ||
637 | sq_play(); | |
638 | ||
639 | return uUsed < 0? uUsed: uWritten; | |
640 | } | |
641 | ||
642 | static unsigned int sq_poll(struct file *file, struct poll_table_struct *wait) | |
643 | { | |
644 | unsigned int mask = 0; | |
645 | int retVal; | |
646 | ||
647 | if (write_sq.locked == 0) { | |
648 | if ((retVal = sq_setup(&write_sq)) < 0) | |
649 | return retVal; | |
650 | return 0; | |
651 | } | |
652 | if (file->f_mode & FMODE_WRITE ) | |
653 | poll_wait(file, &write_sq.action_queue, wait); | |
1da177e4 LT |
654 | if (file->f_mode & FMODE_WRITE) |
655 | if (write_sq.count < write_sq.max_active || write_sq.block_size - write_sq.rear_size > 0) | |
656 | mask |= POLLOUT | POLLWRNORM; | |
657 | return mask; | |
658 | ||
659 | } | |
660 | ||
1da177e4 LT |
661 | static inline void sq_init_waitqueue(struct sound_queue *sq) |
662 | { | |
663 | init_waitqueue_head(&sq->action_queue); | |
664 | init_waitqueue_head(&sq->open_queue); | |
665 | init_waitqueue_head(&sq->sync_queue); | |
666 | sq->busy = 0; | |
667 | } | |
668 | ||
669 | #if 0 /* blocking open() */ | |
670 | static inline void sq_wake_up(struct sound_queue *sq, struct file *file, | |
aeb5d727 | 671 | fmode_t mode) |
1da177e4 LT |
672 | { |
673 | if (file->f_mode & mode) { | |
674 | sq->busy = 0; /* CHECK: IS THIS OK??? */ | |
675 | WAKE_UP(sq->open_queue); | |
676 | } | |
677 | } | |
678 | #endif | |
679 | ||
aeb5d727 | 680 | static int sq_open2(struct sound_queue *sq, struct file *file, fmode_t mode, |
1da177e4 LT |
681 | int numbufs, int bufsize) |
682 | { | |
683 | int rc = 0; | |
684 | ||
685 | if (file->f_mode & mode) { | |
686 | if (sq->busy) { | |
687 | #if 0 /* blocking open() */ | |
688 | rc = -EBUSY; | |
689 | if (file->f_flags & O_NONBLOCK) | |
690 | return rc; | |
691 | rc = -EINTR; | |
692 | while (sq->busy) { | |
693 | SLEEP(sq->open_queue); | |
694 | if (signal_pending(current)) | |
695 | return rc; | |
696 | } | |
697 | rc = 0; | |
698 | #else | |
699 | /* OSS manual says we will return EBUSY regardless | |
700 | of O_NOBLOCK. | |
701 | */ | |
702 | return -EBUSY ; | |
703 | #endif | |
704 | } | |
705 | sq->busy = 1; /* Let's play spot-the-race-condition */ | |
706 | ||
707 | /* allocate the default number & size of buffers. | |
708 | (i.e. specified in _setup() or as module params) | |
709 | can't be changed at the moment - but _could_ be perhaps | |
710 | in the setfragments ioctl. | |
711 | */ | |
712 | if (( rc = sq_allocate_buffers(sq, numbufs, bufsize))) { | |
713 | #if 0 /* blocking open() */ | |
714 | sq_wake_up(sq, file, mode); | |
715 | #else | |
716 | sq->busy = 0 ; | |
717 | #endif | |
718 | return rc; | |
719 | } | |
720 | ||
4b30fbde | 721 | sq->non_blocking = file->f_flags & O_NONBLOCK; |
1da177e4 LT |
722 | } |
723 | return rc; | |
724 | } | |
725 | ||
726 | #define write_sq_init_waitqueue() sq_init_waitqueue(&write_sq) | |
727 | #if 0 /* blocking open() */ | |
728 | #define write_sq_wake_up(file) sq_wake_up(&write_sq, file, FMODE_WRITE) | |
729 | #endif | |
730 | #define write_sq_release_buffers() sq_release_buffers(&write_sq) | |
731 | #define write_sq_open(file) \ | |
732 | sq_open2(&write_sq, file, FMODE_WRITE, numWriteBufs, writeBufSize ) | |
733 | ||
1da177e4 LT |
734 | static int sq_open(struct inode *inode, struct file *file) |
735 | { | |
736 | int rc; | |
737 | ||
738 | if (!try_module_get(dmasound.mach.owner)) | |
739 | return -ENODEV; | |
740 | ||
741 | rc = write_sq_open(file); /* checks the f_mode */ | |
742 | if (rc) | |
743 | goto out; | |
1da177e4 LT |
744 | if (file->f_mode & FMODE_READ) { |
745 | /* TODO: if O_RDWR, release any resources grabbed by write part */ | |
746 | rc = -ENXIO ; /* I think this is what is required by open(2) */ | |
747 | goto out; | |
748 | } | |
1da177e4 LT |
749 | |
750 | if (dmasound.mach.sq_open) | |
751 | dmasound.mach.sq_open(file->f_mode); | |
752 | ||
753 | /* CHECK whether this is sensible - in the case that dsp0 could be opened | |
754 | O_RDONLY and dsp1 could be opened O_WRONLY | |
755 | */ | |
756 | ||
757 | dmasound.minDev = iminor(inode) & 0x0f; | |
758 | ||
759 | /* OK. - we should make some attempt at consistency. At least the H'ware | |
760 | options should be set with a valid mode. We will make it that the LL | |
761 | driver must supply defaults for hard & soft params. | |
762 | */ | |
763 | ||
764 | if (shared_resource_owner == 0) { | |
765 | /* you can make this AFMT_U8/mono/8K if you want to mimic old | |
766 | OSS behaviour - while we still have soft translations ;-) */ | |
767 | dmasound.soft = dmasound.mach.default_soft ; | |
768 | dmasound.dsp = dmasound.mach.default_soft ; | |
769 | dmasound.hard = dmasound.mach.default_hard ; | |
770 | } | |
771 | ||
772 | #ifndef DMASOUND_STRICT_OSS_COMPLIANCE | |
773 | /* none of the current LL drivers can actually do this "native" at the moment | |
774 | OSS does not really require us to supply /dev/audio if we can't do it. | |
775 | */ | |
776 | if (dmasound.minDev == SND_DEV_AUDIO) { | |
777 | sound_set_speed(8000); | |
778 | sound_set_stereo(0); | |
779 | sound_set_format(AFMT_MU_LAW); | |
780 | } | |
781 | #endif | |
782 | ||
783 | return 0; | |
784 | out: | |
785 | module_put(dmasound.mach.owner); | |
786 | return rc; | |
787 | } | |
788 | ||
789 | static void sq_reset_output(void) | |
790 | { | |
791 | sound_silence(); /* this _must_ stop DMA, we might be about to lose the buffers */ | |
792 | write_sq.active = 0; | |
793 | write_sq.count = 0; | |
794 | write_sq.rear_size = 0; | |
795 | /* write_sq.front = (write_sq.rear+1) % write_sq.max_count;*/ | |
796 | write_sq.front = 0 ; | |
797 | write_sq.rear = -1 ; /* same as for set-up */ | |
798 | ||
799 | /* OK - we can unlock the parameters and fragment settings */ | |
800 | write_sq.locked = 0 ; | |
801 | write_sq.user_frags = 0 ; | |
802 | write_sq.user_frag_size = 0 ; | |
803 | } | |
804 | ||
1da177e4 LT |
805 | static void sq_reset(void) |
806 | { | |
807 | sq_reset_output() ; | |
1da177e4 LT |
808 | /* we could consider resetting the shared_resources_owner here... but I |
809 | think it is probably still rather non-obvious to application writer | |
810 | */ | |
811 | ||
812 | /* we release everything else though */ | |
813 | shared_resources_initialised = 0 ; | |
814 | } | |
815 | ||
816 | static int sq_fsync(struct file *filp, struct dentry *dentry) | |
817 | { | |
818 | int rc = 0; | |
819 | int timeout = 5; | |
820 | ||
821 | write_sq.syncing |= 1; | |
822 | sq_play(); /* there may be an incomplete frame waiting */ | |
823 | ||
824 | while (write_sq.active) { | |
825 | SLEEP(write_sq.sync_queue); | |
826 | if (signal_pending(current)) { | |
827 | /* While waiting for audio output to drain, an | |
828 | * interrupt occurred. Stop audio output immediately | |
829 | * and clear the queue. */ | |
830 | sq_reset_output(); | |
831 | rc = -EINTR; | |
832 | break; | |
833 | } | |
834 | if (!--timeout) { | |
835 | printk(KERN_WARNING "dmasound: Timeout draining output\n"); | |
836 | sq_reset_output(); | |
837 | rc = -EIO; | |
838 | break; | |
839 | } | |
840 | } | |
841 | ||
842 | /* flag no sync regardless of whether we had a DSP_POST or not */ | |
843 | write_sq.syncing = 0 ; | |
844 | return rc; | |
845 | } | |
846 | ||
847 | static int sq_release(struct inode *inode, struct file *file) | |
848 | { | |
849 | int rc = 0; | |
850 | ||
851 | lock_kernel(); | |
852 | ||
1da177e4 LT |
853 | if (file->f_mode & FMODE_WRITE) { |
854 | if (write_sq.busy) | |
7bc56323 | 855 | rc = sq_fsync(file, file->f_path.dentry); |
1da177e4 LT |
856 | |
857 | sq_reset_output() ; /* make sure dma is stopped and all is quiet */ | |
858 | write_sq_release_buffers(); | |
859 | write_sq.busy = 0; | |
860 | } | |
861 | ||
862 | if (file->f_mode & shared_resource_owner) { /* it's us that has them */ | |
863 | shared_resource_owner = 0 ; | |
864 | shared_resources_initialised = 0 ; | |
865 | dmasound.hard = dmasound.mach.default_hard ; | |
866 | } | |
867 | ||
868 | module_put(dmasound.mach.owner); | |
869 | ||
870 | #if 0 /* blocking open() */ | |
871 | /* Wake up a process waiting for the queue being released. | |
872 | * Note: There may be several processes waiting for a call | |
873 | * to open() returning. */ | |
874 | ||
875 | /* Iain: hmm I don't understand this next comment ... */ | |
876 | /* There is probably a DOS atack here. They change the mode flag. */ | |
877 | /* XXX add check here,*/ | |
878 | read_sq_wake_up(file); /* checks f_mode */ | |
879 | write_sq_wake_up(file); /* checks f_mode */ | |
880 | #endif /* blocking open() */ | |
881 | ||
882 | unlock_kernel(); | |
883 | ||
884 | return rc; | |
885 | } | |
886 | ||
887 | /* here we see if we have a right to modify format, channels, size and so on | |
888 | if no-one else has claimed it already then we do... | |
889 | ||
890 | TODO: We might change this to mask O_RDWR such that only one or the other channel | |
891 | is the owner - if we have problems. | |
892 | */ | |
893 | ||
aeb5d727 | 894 | static int shared_resources_are_mine(fmode_t md) |
1da177e4 LT |
895 | { |
896 | if (shared_resource_owner) | |
aeb5d727 | 897 | return (shared_resource_owner & md) != 0; |
1da177e4 LT |
898 | else { |
899 | shared_resource_owner = md ; | |
900 | return 1 ; | |
901 | } | |
902 | } | |
903 | ||
904 | /* if either queue is locked we must deny the right to change shared params | |
905 | */ | |
906 | ||
907 | static int queues_are_quiescent(void) | |
908 | { | |
1da177e4 LT |
909 | if (write_sq.locked) |
910 | return 0 ; | |
911 | return 1 ; | |
912 | } | |
913 | ||
914 | /* check and set a queue's fragments per user's wishes... | |
915 | we will check against the pre-defined literals and the actual sizes. | |
916 | This is a bit fraught - because soft translations can mess with our | |
917 | buffer requirements *after* this call - OSS says "call setfrags first" | |
918 | */ | |
919 | ||
920 | /* It is possible to replace all the -EINVAL returns with an override that | |
921 | just puts the allowable value in. This may be what many OSS apps require | |
922 | */ | |
923 | ||
924 | static int set_queue_frags(struct sound_queue *sq, int bufs, int size) | |
925 | { | |
926 | if (sq->locked) { | |
927 | #ifdef DEBUG_DMASOUND | |
928 | printk("dmasound_core: tried to set_queue_frags on a locked queue\n") ; | |
929 | #endif | |
930 | return -EINVAL ; | |
931 | } | |
932 | ||
933 | if ((size < MIN_FRAG_SIZE) || (size > MAX_FRAG_SIZE)) | |
934 | return -EINVAL ; | |
935 | size = (1<<size) ; /* now in bytes */ | |
936 | if (size > sq->bufSize) | |
937 | return -EINVAL ; /* this might still not work */ | |
938 | ||
939 | if (bufs <= 0) | |
940 | return -EINVAL ; | |
941 | if (bufs > sq->numBufs) /* the user is allowed say "don't care" with 0x7fff */ | |
942 | bufs = sq->numBufs ; | |
943 | ||
944 | /* there is, currently, no way to specify max_active separately | |
945 | from max_count. This could be a LL driver issue - I guess | |
946 | if there is a requirement for these values to be different then | |
947 | we will have to pass that info. up to this level. | |
948 | */ | |
949 | sq->user_frags = | |
950 | sq->max_active = bufs ; | |
951 | sq->user_frag_size = size ; | |
952 | ||
953 | return 0 ; | |
954 | } | |
955 | ||
956 | static int sq_ioctl(struct inode *inode, struct file *file, u_int cmd, | |
957 | u_long arg) | |
958 | { | |
959 | int val, result; | |
960 | u_long fmt; | |
961 | int data; | |
962 | int size, nbufs; | |
963 | audio_buf_info info; | |
964 | ||
965 | switch (cmd) { | |
966 | case SNDCTL_DSP_RESET: | |
967 | sq_reset(); | |
968 | return 0; | |
969 | break ; | |
970 | case SNDCTL_DSP_GETFMTS: | |
971 | fmt = dmasound.mach.hardware_afmts ; /* this is what OSS says.. */ | |
972 | return IOCTL_OUT(arg, fmt); | |
973 | break ; | |
974 | case SNDCTL_DSP_GETBLKSIZE: | |
975 | /* this should tell the caller about bytes that the app can | |
976 | read/write - the app doesn't care about our internal buffers. | |
977 | We force sq_setup() here as per OSS 1.1 (which should | |
978 | compute the values necessary). | |
979 | Since there is no mechanism to specify read/write separately, for | |
980 | fds opened O_RDWR, the write_sq values will, arbitrarily, overwrite | |
981 | the read_sq ones. | |
982 | */ | |
983 | size = 0 ; | |
1da177e4 LT |
984 | if (file->f_mode & FMODE_WRITE) { |
985 | if ( !write_sq.locked ) | |
986 | sq_setup(&write_sq) ; | |
987 | size = write_sq.user_frag_size ; | |
988 | } | |
989 | return IOCTL_OUT(arg, size); | |
990 | break ; | |
991 | case SNDCTL_DSP_POST: | |
992 | /* all we are going to do is to tell the LL that any | |
993 | partial frags can be queued for output. | |
994 | The LL will have to clear this flag when last output | |
995 | is queued. | |
996 | */ | |
997 | write_sq.syncing |= 0x2 ; | |
998 | sq_play() ; | |
999 | return 0 ; | |
1000 | case SNDCTL_DSP_SYNC: | |
1001 | /* This call, effectively, has the same behaviour as SNDCTL_DSP_RESET | |
1002 | except that it waits for output to finish before resetting | |
1003 | everything - read, however, is killed imediately. | |
1004 | */ | |
1005 | result = 0 ; | |
1da177e4 | 1006 | if (file->f_mode & FMODE_WRITE) { |
7bc56323 | 1007 | result = sq_fsync(file, file->f_path.dentry); |
1da177e4 LT |
1008 | sq_reset_output() ; |
1009 | } | |
1010 | /* if we are the shared resource owner then release them */ | |
1011 | if (file->f_mode & shared_resource_owner) | |
1012 | shared_resources_initialised = 0 ; | |
1013 | return result ; | |
1014 | break ; | |
1015 | case SOUND_PCM_READ_RATE: | |
1016 | return IOCTL_OUT(arg, dmasound.soft.speed); | |
1017 | case SNDCTL_DSP_SPEED: | |
1018 | /* changing this on the fly will have weird effects on the sound. | |
1019 | Where there are rate conversions implemented in soft form - it | |
1020 | will cause the _ctx_xxx() functions to be substituted. | |
1021 | However, there doesn't appear to be any reason to dis-allow it from | |
1022 | a driver pov. | |
1023 | */ | |
1024 | if (shared_resources_are_mine(file->f_mode)) { | |
1025 | IOCTL_IN(arg, data); | |
1026 | data = sound_set_speed(data) ; | |
1027 | shared_resources_initialised = 0 ; | |
1028 | return IOCTL_OUT(arg, data); | |
1029 | } else | |
1030 | return -EINVAL ; | |
1031 | break ; | |
1032 | /* OSS says these next 4 actions are undefined when the device is | |
1033 | busy/active - we will just return -EINVAL. | |
1034 | To be allowed to change one - (a) you have to own the right | |
1035 | (b) the queue(s) must be quiescent | |
1036 | */ | |
1037 | case SNDCTL_DSP_STEREO: | |
1038 | if (shared_resources_are_mine(file->f_mode) && | |
1039 | queues_are_quiescent()) { | |
1040 | IOCTL_IN(arg, data); | |
1041 | shared_resources_initialised = 0 ; | |
1042 | return IOCTL_OUT(arg, sound_set_stereo(data)); | |
1043 | } else | |
1044 | return -EINVAL ; | |
1045 | break ; | |
1046 | case SOUND_PCM_WRITE_CHANNELS: | |
1047 | if (shared_resources_are_mine(file->f_mode) && | |
1048 | queues_are_quiescent()) { | |
1049 | IOCTL_IN(arg, data); | |
1050 | /* the user might ask for 20 channels, we will return 1 or 2 */ | |
1051 | shared_resources_initialised = 0 ; | |
1052 | return IOCTL_OUT(arg, sound_set_stereo(data-1)+1); | |
1053 | } else | |
1054 | return -EINVAL ; | |
1055 | break ; | |
1056 | case SNDCTL_DSP_SETFMT: | |
1057 | if (shared_resources_are_mine(file->f_mode) && | |
1058 | queues_are_quiescent()) { | |
1059 | int format; | |
1060 | IOCTL_IN(arg, data); | |
1061 | shared_resources_initialised = 0 ; | |
1062 | format = sound_set_format(data); | |
1063 | result = IOCTL_OUT(arg, format); | |
1064 | if (result < 0) | |
1065 | return result; | |
1066 | if (format != data && data != AFMT_QUERY) | |
1067 | return -EINVAL; | |
1068 | return 0; | |
1069 | } else | |
1070 | return -EINVAL ; | |
1071 | case SNDCTL_DSP_SUBDIVIDE: | |
1072 | return -EINVAL ; | |
1073 | case SNDCTL_DSP_SETFRAGMENT: | |
1074 | /* we can do this independently for the two queues - with the | |
1075 | proviso that for fds opened O_RDWR we cannot separate the | |
1076 | actions and both queues will be set per the last call. | |
1077 | NOTE: this does *NOT* actually set the queue up - merely | |
1078 | registers our intentions. | |
1079 | */ | |
1080 | IOCTL_IN(arg, data); | |
1081 | result = 0 ; | |
1082 | nbufs = (data >> 16) & 0x7fff ; /* 0x7fff is 'use maximum' */ | |
1083 | size = data & 0xffff; | |
1da177e4 LT |
1084 | if (file->f_mode & FMODE_WRITE) { |
1085 | result = set_queue_frags(&write_sq, nbufs, size) ; | |
1086 | if (result) | |
1087 | return result ; | |
1088 | } | |
1089 | /* NOTE: this return value is irrelevant - OSS specifically says that | |
1090 | the value is 'random' and that the user _must_ check the actual | |
1091 | frags values using SNDCTL_DSP_GETBLKSIZE or similar */ | |
1092 | return IOCTL_OUT(arg, data); | |
1093 | break ; | |
1094 | case SNDCTL_DSP_GETOSPACE: | |
1095 | /* | |
1096 | */ | |
1097 | if (file->f_mode & FMODE_WRITE) { | |
1098 | if ( !write_sq.locked ) | |
1099 | sq_setup(&write_sq) ; | |
1100 | info.fragments = write_sq.max_active - write_sq.count; | |
1101 | info.fragstotal = write_sq.max_active; | |
1102 | info.fragsize = write_sq.user_frag_size; | |
1103 | info.bytes = info.fragments * info.fragsize; | |
1104 | if (copy_to_user((void __user *)arg, &info, sizeof(info))) | |
1105 | return -EFAULT; | |
1106 | return 0; | |
1107 | } else | |
1108 | return -EINVAL ; | |
1109 | break ; | |
1110 | case SNDCTL_DSP_GETCAPS: | |
1111 | val = dmasound.mach.capabilities & 0xffffff00; | |
1112 | return IOCTL_OUT(arg,val); | |
1113 | ||
1114 | default: | |
1115 | return mixer_ioctl(inode, file, cmd, arg); | |
1116 | } | |
1117 | return -EINVAL; | |
1118 | } | |
1119 | ||
9c2e08c5 | 1120 | static const struct file_operations sq_fops = |
1da177e4 LT |
1121 | { |
1122 | .owner = THIS_MODULE, | |
1123 | .llseek = no_llseek, | |
1124 | .write = sq_write, | |
1125 | .poll = sq_poll, | |
1126 | .ioctl = sq_ioctl, | |
1127 | .open = sq_open, | |
1128 | .release = sq_release, | |
d8b3966e AV |
1129 | }; |
1130 | ||
1da177e4 LT |
1131 | static int sq_init(void) |
1132 | { | |
d8b3966e | 1133 | const struct file_operations *fops = &sq_fops; |
1da177e4 LT |
1134 | #ifndef MODULE |
1135 | int sq_unit; | |
1136 | #endif | |
1137 | ||
d8b3966e | 1138 | sq_unit = register_sound_dsp(fops, -1); |
1da177e4 LT |
1139 | if (sq_unit < 0) { |
1140 | printk(KERN_ERR "dmasound_core: couldn't register fops\n") ; | |
1141 | return sq_unit ; | |
1142 | } | |
1143 | ||
1144 | write_sq_init_waitqueue(); | |
1da177e4 LT |
1145 | |
1146 | /* These parameters will be restored for every clean open() | |
1147 | * in the case of multiple open()s (e.g. dsp0 & dsp1) they | |
1148 | * will be set so long as the shared resources have no owner. | |
1149 | */ | |
1150 | ||
1151 | if (shared_resource_owner == 0) { | |
1152 | dmasound.soft = dmasound.mach.default_soft ; | |
1153 | dmasound.hard = dmasound.mach.default_hard ; | |
1154 | dmasound.dsp = dmasound.mach.default_soft ; | |
1155 | shared_resources_initialised = 0 ; | |
1156 | } | |
1157 | return 0 ; | |
1158 | } | |
1159 | ||
1160 | ||
1161 | /* | |
1162 | * /dev/sndstat | |
1163 | */ | |
1164 | ||
1165 | /* we allow more space for record-enabled because there are extra output lines. | |
1166 | the number here must include the amount we are prepared to give to the low-level | |
1167 | driver. | |
1168 | */ | |
1169 | ||
1da177e4 | 1170 | #define STAT_BUFF_LEN 768 |
1da177e4 LT |
1171 | |
1172 | /* this is how much space we will allow the low-level driver to use | |
1173 | in the stat buffer. Currently, 2 * (80 character line + <NL>). | |
1174 | We do not police this (it is up to the ll driver to be honest). | |
1175 | */ | |
1176 | ||
1177 | #define LOW_LEVEL_STAT_ALLOC 162 | |
1178 | ||
1179 | static struct { | |
1180 | int busy; | |
1181 | char buf[STAT_BUFF_LEN]; /* state.buf should not overflow! */ | |
1182 | int len, ptr; | |
1183 | } state; | |
1184 | ||
1185 | /* publish this function for use by low-level code, if required */ | |
1186 | ||
0a1b42db | 1187 | static char *get_afmt_string(int afmt) |
1da177e4 LT |
1188 | { |
1189 | switch(afmt) { | |
1190 | case AFMT_MU_LAW: | |
1191 | return "mu-law"; | |
1192 | break; | |
1193 | case AFMT_A_LAW: | |
1194 | return "A-law"; | |
1195 | break; | |
1196 | case AFMT_U8: | |
1197 | return "unsigned 8 bit"; | |
1198 | break; | |
1199 | case AFMT_S8: | |
1200 | return "signed 8 bit"; | |
1201 | break; | |
1202 | case AFMT_S16_BE: | |
1203 | return "signed 16 bit BE"; | |
1204 | break; | |
1205 | case AFMT_U16_BE: | |
1206 | return "unsigned 16 bit BE"; | |
1207 | break; | |
1208 | case AFMT_S16_LE: | |
1209 | return "signed 16 bit LE"; | |
1210 | break; | |
1211 | case AFMT_U16_LE: | |
1212 | return "unsigned 16 bit LE"; | |
1213 | break; | |
1214 | case 0: | |
1215 | return "format not set" ; | |
1216 | break ; | |
1217 | default: | |
1218 | break ; | |
1219 | } | |
1220 | return "ERROR: Unsupported AFMT_XXXX code" ; | |
1221 | } | |
1222 | ||
1223 | static int state_open(struct inode *inode, struct file *file) | |
1224 | { | |
1225 | char *buffer = state.buf; | |
1226 | int len = 0; | |
1227 | ||
1228 | if (state.busy) | |
1229 | return -EBUSY; | |
1230 | ||
1231 | if (!try_module_get(dmasound.mach.owner)) | |
1232 | return -ENODEV; | |
1233 | state.ptr = 0; | |
1234 | state.busy = 1; | |
1235 | ||
1236 | len += sprintf(buffer+len, "%sDMA sound driver rev %03d :\n", | |
1237 | dmasound.mach.name, (DMASOUND_CORE_REVISION<<4) + | |
1238 | ((dmasound.mach.version>>8) & 0x0f)); | |
1239 | len += sprintf(buffer+len, | |
1240 | "Core driver edition %02d.%02d : %s driver edition %02d.%02d\n", | |
1241 | DMASOUND_CORE_REVISION, DMASOUND_CORE_EDITION, dmasound.mach.name2, | |
1242 | (dmasound.mach.version >> 8), (dmasound.mach.version & 0xff)) ; | |
1243 | ||
1244 | /* call the low-level module to fill in any stat info. that it has | |
1245 | if present. Maximum buffer usage is specified. | |
1246 | */ | |
1247 | ||
1248 | if (dmasound.mach.state_info) | |
1249 | len += dmasound.mach.state_info(buffer+len, | |
1250 | (size_t) LOW_LEVEL_STAT_ALLOC) ; | |
1251 | ||
1252 | /* make usage of the state buffer as deterministic as poss. | |
1253 | exceptional conditions could cause overrun - and this is flagged as | |
1254 | a kernel error. | |
1255 | */ | |
1256 | ||
1257 | /* formats and settings */ | |
1258 | ||
1259 | len += sprintf(buffer+len,"\t\t === Formats & settings ===\n") ; | |
1260 | len += sprintf(buffer+len,"Parameter %20s%20s\n","soft","hard") ; | |
1261 | len += sprintf(buffer+len,"Format :%20s%20s\n", | |
1262 | get_afmt_string(dmasound.soft.format), | |
1263 | get_afmt_string(dmasound.hard.format)); | |
1264 | ||
1265 | len += sprintf(buffer+len,"Samp Rate:%14d s/sec%14d s/sec\n", | |
1266 | dmasound.soft.speed, dmasound.hard.speed); | |
1267 | ||
1268 | len += sprintf(buffer+len,"Channels :%20s%20s\n", | |
1269 | dmasound.soft.stereo ? "stereo" : "mono", | |
1270 | dmasound.hard.stereo ? "stereo" : "mono" ); | |
1271 | ||
1272 | /* sound queue status */ | |
1273 | ||
1274 | len += sprintf(buffer+len,"\t\t === Sound Queue status ===\n"); | |
1275 | len += sprintf(buffer+len,"Allocated:%8s%6s\n","Buffers","Size") ; | |
1276 | len += sprintf(buffer+len,"%9s:%8d%6d\n", | |
1277 | "write", write_sq.numBufs, write_sq.bufSize) ; | |
1da177e4 LT |
1278 | len += sprintf(buffer+len, |
1279 | "Current : MaxFrg FragSiz MaxAct Frnt Rear " | |
1280 | "Cnt RrSize A B S L xruns\n") ; | |
1281 | len += sprintf(buffer+len,"%9s:%7d%8d%7d%5d%5d%4d%7d%2d%2d%2d%2d%7d\n", | |
1282 | "write", write_sq.max_count, write_sq.block_size, | |
1283 | write_sq.max_active, write_sq.front, write_sq.rear, | |
1284 | write_sq.count, write_sq.rear_size, write_sq.active, | |
1285 | write_sq.busy, write_sq.syncing, write_sq.locked, write_sq.xruns) ; | |
1da177e4 LT |
1286 | #ifdef DEBUG_DMASOUND |
1287 | printk("dmasound: stat buffer used %d bytes\n", len) ; | |
1288 | #endif | |
1289 | ||
1290 | if (len >= STAT_BUFF_LEN) | |
1291 | printk(KERN_ERR "dmasound_core: stat buffer overflowed!\n"); | |
1292 | ||
1293 | state.len = len; | |
1294 | return 0; | |
1295 | } | |
1296 | ||
1297 | static int state_release(struct inode *inode, struct file *file) | |
1298 | { | |
1299 | lock_kernel(); | |
1300 | state.busy = 0; | |
1301 | module_put(dmasound.mach.owner); | |
1302 | unlock_kernel(); | |
1303 | return 0; | |
1304 | } | |
1305 | ||
1306 | static ssize_t state_read(struct file *file, char __user *buf, size_t count, | |
1307 | loff_t *ppos) | |
1308 | { | |
1309 | int n = state.len - state.ptr; | |
1310 | if (n > count) | |
1311 | n = count; | |
1312 | if (n <= 0) | |
1313 | return 0; | |
1314 | if (copy_to_user(buf, &state.buf[state.ptr], n)) | |
1315 | return -EFAULT; | |
1316 | state.ptr += n; | |
1317 | return n; | |
1318 | } | |
1319 | ||
9c2e08c5 | 1320 | static const struct file_operations state_fops = { |
1da177e4 LT |
1321 | .owner = THIS_MODULE, |
1322 | .llseek = no_llseek, | |
1323 | .read = state_read, | |
1324 | .open = state_open, | |
1325 | .release = state_release, | |
1326 | }; | |
1327 | ||
1328 | static int state_init(void) | |
1329 | { | |
1330 | #ifndef MODULE | |
1331 | int state_unit; | |
1332 | #endif | |
1333 | state_unit = register_sound_special(&state_fops, SND_DEV_STATUS); | |
1334 | if (state_unit < 0) | |
1335 | return state_unit ; | |
1336 | state.busy = 0; | |
1337 | return 0 ; | |
1338 | } | |
1339 | ||
1340 | ||
1341 | /* | |
1342 | * Config & Setup | |
1343 | * | |
1344 | * This function is called by _one_ chipset-specific driver | |
1345 | */ | |
1346 | ||
1347 | int dmasound_init(void) | |
1348 | { | |
1349 | int res ; | |
1350 | #ifdef MODULE | |
1351 | if (irq_installed) | |
1352 | return -EBUSY; | |
1353 | #endif | |
1354 | ||
1355 | /* Set up sound queue, /dev/audio and /dev/dsp. */ | |
1356 | ||
1357 | /* Set default settings. */ | |
1358 | if ((res = sq_init()) < 0) | |
1359 | return res ; | |
1360 | ||
1361 | /* Set up /dev/sndstat. */ | |
1362 | if ((res = state_init()) < 0) | |
1363 | return res ; | |
1364 | ||
1365 | /* Set up /dev/mixer. */ | |
1366 | mixer_init(); | |
1367 | ||
1368 | if (!dmasound.mach.irqinit()) { | |
1369 | printk(KERN_ERR "DMA sound driver: Interrupt initialization failed\n"); | |
1370 | return -ENODEV; | |
1371 | } | |
1372 | #ifdef MODULE | |
1373 | irq_installed = 1; | |
1374 | #endif | |
1375 | ||
1376 | printk(KERN_INFO "%s DMA sound driver rev %03d installed\n", | |
1377 | dmasound.mach.name, (DMASOUND_CORE_REVISION<<4) + | |
1378 | ((dmasound.mach.version>>8) & 0x0f)); | |
1379 | printk(KERN_INFO | |
1380 | "Core driver edition %02d.%02d : %s driver edition %02d.%02d\n", | |
1381 | DMASOUND_CORE_REVISION, DMASOUND_CORE_EDITION, dmasound.mach.name2, | |
1382 | (dmasound.mach.version >> 8), (dmasound.mach.version & 0xff)) ; | |
1383 | printk(KERN_INFO "Write will use %4d fragments of %7d bytes as default\n", | |
1384 | numWriteBufs, writeBufSize) ; | |
1da177e4 LT |
1385 | return 0; |
1386 | } | |
1387 | ||
1388 | #ifdef MODULE | |
1389 | ||
1390 | void dmasound_deinit(void) | |
1391 | { | |
1392 | if (irq_installed) { | |
1393 | sound_silence(); | |
1394 | dmasound.mach.irqcleanup(); | |
1395 | irq_installed = 0; | |
1396 | } | |
1397 | ||
1398 | write_sq_release_buffers(); | |
1da177e4 LT |
1399 | |
1400 | if (mixer_unit >= 0) | |
1401 | unregister_sound_mixer(mixer_unit); | |
1402 | if (state_unit >= 0) | |
1403 | unregister_sound_special(state_unit); | |
1404 | if (sq_unit >= 0) | |
1405 | unregister_sound_dsp(sq_unit); | |
1406 | } | |
1407 | ||
1408 | #else /* !MODULE */ | |
1409 | ||
1410 | static int dmasound_setup(char *str) | |
1411 | { | |
1412 | int ints[6], size; | |
1413 | ||
1414 | str = get_options(str, ARRAY_SIZE(ints), ints); | |
1415 | ||
1416 | /* check the bootstrap parameter for "dmasound=" */ | |
1417 | ||
1418 | /* FIXME: other than in the most naive of cases there is no sense in these | |
1419 | * buffers being other than powers of two. This is not checked yet. | |
1420 | */ | |
1421 | ||
1422 | switch (ints[0]) { | |
1da177e4 LT |
1423 | case 3: |
1424 | if ((ints[3] < 0) || (ints[3] > MAX_CATCH_RADIUS)) | |
1425 | printk("dmasound_setup: invalid catch radius, using default = %d\n", catchRadius); | |
1426 | else | |
1427 | catchRadius = ints[3]; | |
1428 | /* fall through */ | |
1da177e4 LT |
1429 | case 2: |
1430 | if (ints[1] < MIN_BUFFERS) | |
1431 | printk("dmasound_setup: invalid number of buffers, using default = %d\n", numWriteBufs); | |
1432 | else | |
1433 | numWriteBufs = ints[1]; | |
1434 | /* fall through */ | |
1435 | case 1: | |
1436 | if ((size = ints[2]) < 256) /* check for small buffer specs */ | |
1437 | size <<= 10 ; | |
1438 | if (size < MIN_BUFSIZE || size > MAX_BUFSIZE) | |
1439 | printk("dmasound_setup: invalid write buffer size, using default = %d\n", writeBufSize); | |
1440 | else | |
1441 | writeBufSize = size; | |
1442 | case 0: | |
1443 | break; | |
1444 | default: | |
1445 | printk("dmasound_setup: invalid number of arguments\n"); | |
1446 | return 0; | |
1447 | } | |
1448 | return 1; | |
1449 | } | |
1450 | ||
1451 | __setup("dmasound=", dmasound_setup); | |
1452 | ||
1453 | #endif /* !MODULE */ | |
1454 | ||
1455 | /* | |
1456 | * Conversion tables | |
1457 | */ | |
1458 | ||
1459 | #ifdef HAS_8BIT_TABLES | |
1460 | /* 8 bit mu-law */ | |
1461 | ||
1462 | char dmasound_ulaw2dma8[] = { | |
1463 | -126, -122, -118, -114, -110, -106, -102, -98, | |
1464 | -94, -90, -86, -82, -78, -74, -70, -66, | |
1465 | -63, -61, -59, -57, -55, -53, -51, -49, | |
1466 | -47, -45, -43, -41, -39, -37, -35, -33, | |
1467 | -31, -30, -29, -28, -27, -26, -25, -24, | |
1468 | -23, -22, -21, -20, -19, -18, -17, -16, | |
1469 | -16, -15, -15, -14, -14, -13, -13, -12, | |
1470 | -12, -11, -11, -10, -10, -9, -9, -8, | |
1471 | -8, -8, -7, -7, -7, -7, -6, -6, | |
1472 | -6, -6, -5, -5, -5, -5, -4, -4, | |
1473 | -4, -4, -4, -4, -3, -3, -3, -3, | |
1474 | -3, -3, -3, -3, -2, -2, -2, -2, | |
1475 | -2, -2, -2, -2, -2, -2, -2, -2, | |
1476 | -1, -1, -1, -1, -1, -1, -1, -1, | |
1477 | -1, -1, -1, -1, -1, -1, -1, -1, | |
1478 | -1, -1, -1, -1, -1, -1, -1, 0, | |
1479 | 125, 121, 117, 113, 109, 105, 101, 97, | |
1480 | 93, 89, 85, 81, 77, 73, 69, 65, | |
1481 | 62, 60, 58, 56, 54, 52, 50, 48, | |
1482 | 46, 44, 42, 40, 38, 36, 34, 32, | |
1483 | 30, 29, 28, 27, 26, 25, 24, 23, | |
1484 | 22, 21, 20, 19, 18, 17, 16, 15, | |
1485 | 15, 14, 14, 13, 13, 12, 12, 11, | |
1486 | 11, 10, 10, 9, 9, 8, 8, 7, | |
1487 | 7, 7, 6, 6, 6, 6, 5, 5, | |
1488 | 5, 5, 4, 4, 4, 4, 3, 3, | |
1489 | 3, 3, 3, 3, 2, 2, 2, 2, | |
1490 | 2, 2, 2, 2, 1, 1, 1, 1, | |
1491 | 1, 1, 1, 1, 1, 1, 1, 1, | |
1492 | 0, 0, 0, 0, 0, 0, 0, 0, | |
1493 | 0, 0, 0, 0, 0, 0, 0, 0, | |
1494 | 0, 0, 0, 0, 0, 0, 0, 0 | |
1495 | }; | |
1496 | ||
1497 | /* 8 bit A-law */ | |
1498 | ||
1499 | char dmasound_alaw2dma8[] = { | |
1500 | -22, -21, -24, -23, -18, -17, -20, -19, | |
1501 | -30, -29, -32, -31, -26, -25, -28, -27, | |
1502 | -11, -11, -12, -12, -9, -9, -10, -10, | |
1503 | -15, -15, -16, -16, -13, -13, -14, -14, | |
1504 | -86, -82, -94, -90, -70, -66, -78, -74, | |
1505 | -118, -114, -126, -122, -102, -98, -110, -106, | |
1506 | -43, -41, -47, -45, -35, -33, -39, -37, | |
1507 | -59, -57, -63, -61, -51, -49, -55, -53, | |
1508 | -2, -2, -2, -2, -2, -2, -2, -2, | |
1509 | -2, -2, -2, -2, -2, -2, -2, -2, | |
1510 | -1, -1, -1, -1, -1, -1, -1, -1, | |
1511 | -1, -1, -1, -1, -1, -1, -1, -1, | |
1512 | -6, -6, -6, -6, -5, -5, -5, -5, | |
1513 | -8, -8, -8, -8, -7, -7, -7, -7, | |
1514 | -3, -3, -3, -3, -3, -3, -3, -3, | |
1515 | -4, -4, -4, -4, -4, -4, -4, -4, | |
1516 | 21, 20, 23, 22, 17, 16, 19, 18, | |
1517 | 29, 28, 31, 30, 25, 24, 27, 26, | |
1518 | 10, 10, 11, 11, 8, 8, 9, 9, | |
1519 | 14, 14, 15, 15, 12, 12, 13, 13, | |
1520 | 86, 82, 94, 90, 70, 66, 78, 74, | |
1521 | 118, 114, 126, 122, 102, 98, 110, 106, | |
1522 | 43, 41, 47, 45, 35, 33, 39, 37, | |
1523 | 59, 57, 63, 61, 51, 49, 55, 53, | |
1524 | 1, 1, 1, 1, 1, 1, 1, 1, | |
1525 | 1, 1, 1, 1, 1, 1, 1, 1, | |
1526 | 0, 0, 0, 0, 0, 0, 0, 0, | |
1527 | 0, 0, 0, 0, 0, 0, 0, 0, | |
1528 | 5, 5, 5, 5, 4, 4, 4, 4, | |
1529 | 7, 7, 7, 7, 6, 6, 6, 6, | |
1530 | 2, 2, 2, 2, 2, 2, 2, 2, | |
1531 | 3, 3, 3, 3, 3, 3, 3, 3 | |
1532 | }; | |
1533 | #endif /* HAS_8BIT_TABLES */ | |
1534 | ||
1535 | /* | |
1536 | * Visible symbols for modules | |
1537 | */ | |
1538 | ||
1539 | EXPORT_SYMBOL(dmasound); | |
1540 | EXPORT_SYMBOL(dmasound_init); | |
1541 | #ifdef MODULE | |
1542 | EXPORT_SYMBOL(dmasound_deinit); | |
1543 | #endif | |
1544 | EXPORT_SYMBOL(dmasound_write_sq); | |
1da177e4 LT |
1545 | EXPORT_SYMBOL(dmasound_catchRadius); |
1546 | #ifdef HAS_8BIT_TABLES | |
1547 | EXPORT_SYMBOL(dmasound_ulaw2dma8); | |
1548 | EXPORT_SYMBOL(dmasound_alaw2dma8); | |
1549 | #endif |