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-rw-r--r--sound/drivers/dummy.c700
1 files changed, 537 insertions, 163 deletions
diff --git a/sound/drivers/dummy.c b/sound/drivers/dummy.c
index 54239d2e0997..6ba066c41d2e 100644
--- a/sound/drivers/dummy.c
+++ b/sound/drivers/dummy.c
@@ -25,12 +25,15 @@
25#include <linux/slab.h> 25#include <linux/slab.h>
26#include <linux/time.h> 26#include <linux/time.h>
27#include <linux/wait.h> 27#include <linux/wait.h>
28#include <linux/hrtimer.h>
29#include <linux/math64.h>
28#include <linux/moduleparam.h> 30#include <linux/moduleparam.h>
29#include <sound/core.h> 31#include <sound/core.h>
30#include <sound/control.h> 32#include <sound/control.h>
31#include <sound/tlv.h> 33#include <sound/tlv.h>
32#include <sound/pcm.h> 34#include <sound/pcm.h>
33#include <sound/rawmidi.h> 35#include <sound/rawmidi.h>
36#include <sound/info.h>
34#include <sound/initval.h> 37#include <sound/initval.h>
35 38
36MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>"); 39MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
@@ -39,7 +42,7 @@ MODULE_LICENSE("GPL");
39MODULE_SUPPORTED_DEVICE("{{ALSA,Dummy soundcard}}"); 42MODULE_SUPPORTED_DEVICE("{{ALSA,Dummy soundcard}}");
40 43
41#define MAX_PCM_DEVICES 4 44#define MAX_PCM_DEVICES 4
42#define MAX_PCM_SUBSTREAMS 16 45#define MAX_PCM_SUBSTREAMS 128
43#define MAX_MIDI_DEVICES 2 46#define MAX_MIDI_DEVICES 2
44 47
45#if 0 /* emu10k1 emulation */ 48#if 0 /* emu10k1 emulation */
@@ -148,6 +151,10 @@ static int enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 0};
148static int pcm_devs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1}; 151static int pcm_devs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1};
149static int pcm_substreams[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 8}; 152static int pcm_substreams[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 8};
150//static int midi_devs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 2}; 153//static int midi_devs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 2};
154#ifdef CONFIG_HIGH_RES_TIMERS
155static int hrtimer = 1;
156#endif
157static int fake_buffer = 1;
151 158
152module_param_array(index, int, NULL, 0444); 159module_param_array(index, int, NULL, 0444);
153MODULE_PARM_DESC(index, "Index value for dummy soundcard."); 160MODULE_PARM_DESC(index, "Index value for dummy soundcard.");
@@ -161,6 +168,12 @@ module_param_array(pcm_substreams, int, NULL, 0444);
161MODULE_PARM_DESC(pcm_substreams, "PCM substreams # (1-16) for dummy driver."); 168MODULE_PARM_DESC(pcm_substreams, "PCM substreams # (1-16) for dummy driver.");
162//module_param_array(midi_devs, int, NULL, 0444); 169//module_param_array(midi_devs, int, NULL, 0444);
163//MODULE_PARM_DESC(midi_devs, "MIDI devices # (0-2) for dummy driver."); 170//MODULE_PARM_DESC(midi_devs, "MIDI devices # (0-2) for dummy driver.");
171module_param(fake_buffer, bool, 0444);
172MODULE_PARM_DESC(fake_buffer, "Fake buffer allocations.");
173#ifdef CONFIG_HIGH_RES_TIMERS
174module_param(hrtimer, bool, 0644);
175MODULE_PARM_DESC(hrtimer, "Use hrtimer as the timer source.");
176#endif
164 177
165static struct platform_device *devices[SNDRV_CARDS]; 178static struct platform_device *devices[SNDRV_CARDS];
166 179
@@ -171,137 +184,324 @@ static struct platform_device *devices[SNDRV_CARDS];
171#define MIXER_ADDR_CD 4 184#define MIXER_ADDR_CD 4
172#define MIXER_ADDR_LAST 4 185#define MIXER_ADDR_LAST 4
173 186
187struct dummy_timer_ops {
188 int (*create)(struct snd_pcm_substream *);
189 void (*free)(struct snd_pcm_substream *);
190 int (*prepare)(struct snd_pcm_substream *);
191 int (*start)(struct snd_pcm_substream *);
192 int (*stop)(struct snd_pcm_substream *);
193 snd_pcm_uframes_t (*pointer)(struct snd_pcm_substream *);
194};
195
174struct snd_dummy { 196struct snd_dummy {
175 struct snd_card *card; 197 struct snd_card *card;
176 struct snd_pcm *pcm; 198 struct snd_pcm *pcm;
177 spinlock_t mixer_lock; 199 spinlock_t mixer_lock;
178 int mixer_volume[MIXER_ADDR_LAST+1][2]; 200 int mixer_volume[MIXER_ADDR_LAST+1][2];
179 int capture_source[MIXER_ADDR_LAST+1][2]; 201 int capture_source[MIXER_ADDR_LAST+1][2];
202 const struct dummy_timer_ops *timer_ops;
180}; 203};
181 204
182struct snd_dummy_pcm { 205/*
183 struct snd_dummy *dummy; 206 * system timer interface
207 */
208
209struct dummy_systimer_pcm {
184 spinlock_t lock; 210 spinlock_t lock;
185 struct timer_list timer; 211 struct timer_list timer;
186 unsigned int pcm_buffer_size; 212 unsigned long base_time;
187 unsigned int pcm_period_size; 213 unsigned int frac_pos; /* fractional sample position (based HZ) */
188 unsigned int pcm_bps; /* bytes per second */ 214 unsigned int frac_period_rest;
189 unsigned int pcm_hz; /* HZ */ 215 unsigned int frac_buffer_size; /* buffer_size * HZ */
190 unsigned int pcm_irq_pos; /* IRQ position */ 216 unsigned int frac_period_size; /* period_size * HZ */
191 unsigned int pcm_buf_pos; /* position in buffer */ 217 unsigned int rate;
218 int elapsed;
192 struct snd_pcm_substream *substream; 219 struct snd_pcm_substream *substream;
193}; 220};
194 221
195 222static void dummy_systimer_rearm(struct dummy_systimer_pcm *dpcm)
196static inline void snd_card_dummy_pcm_timer_start(struct snd_dummy_pcm *dpcm)
197{ 223{
198 dpcm->timer.expires = 1 + jiffies; 224 dpcm->timer.expires = jiffies +
225 (dpcm->frac_period_rest + dpcm->rate - 1) / dpcm->rate;
199 add_timer(&dpcm->timer); 226 add_timer(&dpcm->timer);
200} 227}
201 228
202static inline void snd_card_dummy_pcm_timer_stop(struct snd_dummy_pcm *dpcm) 229static void dummy_systimer_update(struct dummy_systimer_pcm *dpcm)
203{ 230{
204 del_timer(&dpcm->timer); 231 unsigned long delta;
232
233 delta = jiffies - dpcm->base_time;
234 if (!delta)
235 return;
236 dpcm->base_time += delta;
237 delta *= dpcm->rate;
238 dpcm->frac_pos += delta;
239 while (dpcm->frac_pos >= dpcm->frac_buffer_size)
240 dpcm->frac_pos -= dpcm->frac_buffer_size;
241 while (dpcm->frac_period_rest <= delta) {
242 dpcm->elapsed++;
243 dpcm->frac_period_rest += dpcm->frac_period_size;
244 }
245 dpcm->frac_period_rest -= delta;
205} 246}
206 247
207static int snd_card_dummy_pcm_trigger(struct snd_pcm_substream *substream, int cmd) 248static int dummy_systimer_start(struct snd_pcm_substream *substream)
208{ 249{
209 struct snd_pcm_runtime *runtime = substream->runtime; 250 struct dummy_systimer_pcm *dpcm = substream->runtime->private_data;
210 struct snd_dummy_pcm *dpcm = runtime->private_data; 251 spin_lock(&dpcm->lock);
211 int err = 0; 252 dpcm->base_time = jiffies;
253 dummy_systimer_rearm(dpcm);
254 spin_unlock(&dpcm->lock);
255 return 0;
256}
212 257
258static int dummy_systimer_stop(struct snd_pcm_substream *substream)
259{
260 struct dummy_systimer_pcm *dpcm = substream->runtime->private_data;
213 spin_lock(&dpcm->lock); 261 spin_lock(&dpcm->lock);
214 switch (cmd) { 262 del_timer(&dpcm->timer);
215 case SNDRV_PCM_TRIGGER_START:
216 case SNDRV_PCM_TRIGGER_RESUME:
217 snd_card_dummy_pcm_timer_start(dpcm);
218 break;
219 case SNDRV_PCM_TRIGGER_STOP:
220 case SNDRV_PCM_TRIGGER_SUSPEND:
221 snd_card_dummy_pcm_timer_stop(dpcm);
222 break;
223 default:
224 err = -EINVAL;
225 break;
226 }
227 spin_unlock(&dpcm->lock); 263 spin_unlock(&dpcm->lock);
228 return 0; 264 return 0;
229} 265}
230 266
231static int snd_card_dummy_pcm_prepare(struct snd_pcm_substream *substream) 267static int dummy_systimer_prepare(struct snd_pcm_substream *substream)
232{ 268{
233 struct snd_pcm_runtime *runtime = substream->runtime; 269 struct snd_pcm_runtime *runtime = substream->runtime;
234 struct snd_dummy_pcm *dpcm = runtime->private_data; 270 struct dummy_systimer_pcm *dpcm = runtime->private_data;
235 int bps;
236
237 bps = snd_pcm_format_width(runtime->format) * runtime->rate *
238 runtime->channels / 8;
239
240 if (bps <= 0)
241 return -EINVAL;
242
243 dpcm->pcm_bps = bps;
244 dpcm->pcm_hz = HZ;
245 dpcm->pcm_buffer_size = snd_pcm_lib_buffer_bytes(substream);
246 dpcm->pcm_period_size = snd_pcm_lib_period_bytes(substream);
247 dpcm->pcm_irq_pos = 0;
248 dpcm->pcm_buf_pos = 0;
249 271
250 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, 272 dpcm->frac_pos = 0;
251 bytes_to_samples(runtime, runtime->dma_bytes)); 273 dpcm->rate = runtime->rate;
274 dpcm->frac_buffer_size = runtime->buffer_size * HZ;
275 dpcm->frac_period_size = runtime->period_size * HZ;
276 dpcm->frac_period_rest = dpcm->frac_period_size;
277 dpcm->elapsed = 0;
252 278
253 return 0; 279 return 0;
254} 280}
255 281
256static void snd_card_dummy_pcm_timer_function(unsigned long data) 282static void dummy_systimer_callback(unsigned long data)
257{ 283{
258 struct snd_dummy_pcm *dpcm = (struct snd_dummy_pcm *)data; 284 struct dummy_systimer_pcm *dpcm = (struct dummy_systimer_pcm *)data;
259 unsigned long flags; 285 unsigned long flags;
286 int elapsed = 0;
260 287
261 spin_lock_irqsave(&dpcm->lock, flags); 288 spin_lock_irqsave(&dpcm->lock, flags);
262 dpcm->timer.expires = 1 + jiffies; 289 dummy_systimer_update(dpcm);
263 add_timer(&dpcm->timer); 290 dummy_systimer_rearm(dpcm);
264 dpcm->pcm_irq_pos += dpcm->pcm_bps; 291 elapsed = dpcm->elapsed;
265 dpcm->pcm_buf_pos += dpcm->pcm_bps; 292 dpcm->elapsed = 0;
266 dpcm->pcm_buf_pos %= dpcm->pcm_buffer_size * dpcm->pcm_hz; 293 spin_unlock_irqrestore(&dpcm->lock, flags);
267 if (dpcm->pcm_irq_pos >= dpcm->pcm_period_size * dpcm->pcm_hz) { 294 if (elapsed)
268 dpcm->pcm_irq_pos %= dpcm->pcm_period_size * dpcm->pcm_hz; 295 snd_pcm_period_elapsed(dpcm->substream);
269 spin_unlock_irqrestore(&dpcm->lock, flags); 296}
297
298static snd_pcm_uframes_t
299dummy_systimer_pointer(struct snd_pcm_substream *substream)
300{
301 struct dummy_systimer_pcm *dpcm = substream->runtime->private_data;
302 snd_pcm_uframes_t pos;
303
304 spin_lock(&dpcm->lock);
305 dummy_systimer_update(dpcm);
306 pos = dpcm->frac_pos / HZ;
307 spin_unlock(&dpcm->lock);
308 return pos;
309}
310
311static int dummy_systimer_create(struct snd_pcm_substream *substream)
312{
313 struct dummy_systimer_pcm *dpcm;
314
315 dpcm = kzalloc(sizeof(*dpcm), GFP_KERNEL);
316 if (!dpcm)
317 return -ENOMEM;
318 substream->runtime->private_data = dpcm;
319 init_timer(&dpcm->timer);
320 dpcm->timer.data = (unsigned long) dpcm;
321 dpcm->timer.function = dummy_systimer_callback;
322 spin_lock_init(&dpcm->lock);
323 dpcm->substream = substream;
324 return 0;
325}
326
327static void dummy_systimer_free(struct snd_pcm_substream *substream)
328{
329 kfree(substream->runtime->private_data);
330}
331
332static struct dummy_timer_ops dummy_systimer_ops = {
333 .create = dummy_systimer_create,
334 .free = dummy_systimer_free,
335 .prepare = dummy_systimer_prepare,
336 .start = dummy_systimer_start,
337 .stop = dummy_systimer_stop,
338 .pointer = dummy_systimer_pointer,
339};
340
341#ifdef CONFIG_HIGH_RES_TIMERS
342/*
343 * hrtimer interface
344 */
345
346struct dummy_hrtimer_pcm {
347 ktime_t base_time;
348 ktime_t period_time;
349 atomic_t running;
350 struct hrtimer timer;
351 struct tasklet_struct tasklet;
352 struct snd_pcm_substream *substream;
353};
354
355static void dummy_hrtimer_pcm_elapsed(unsigned long priv)
356{
357 struct dummy_hrtimer_pcm *dpcm = (struct dummy_hrtimer_pcm *)priv;
358 if (atomic_read(&dpcm->running))
270 snd_pcm_period_elapsed(dpcm->substream); 359 snd_pcm_period_elapsed(dpcm->substream);
271 } else
272 spin_unlock_irqrestore(&dpcm->lock, flags);
273} 360}
274 361
275static snd_pcm_uframes_t snd_card_dummy_pcm_pointer(struct snd_pcm_substream *substream) 362static enum hrtimer_restart dummy_hrtimer_callback(struct hrtimer *timer)
363{
364 struct dummy_hrtimer_pcm *dpcm;
365
366 dpcm = container_of(timer, struct dummy_hrtimer_pcm, timer);
367 if (!atomic_read(&dpcm->running))
368 return HRTIMER_NORESTART;
369 tasklet_schedule(&dpcm->tasklet);
370 hrtimer_forward_now(timer, dpcm->period_time);
371 return HRTIMER_RESTART;
372}
373
374static int dummy_hrtimer_start(struct snd_pcm_substream *substream)
375{
376 struct dummy_hrtimer_pcm *dpcm = substream->runtime->private_data;
377
378 dpcm->base_time = hrtimer_cb_get_time(&dpcm->timer);
379 hrtimer_start(&dpcm->timer, dpcm->period_time, HRTIMER_MODE_REL);
380 atomic_set(&dpcm->running, 1);
381 return 0;
382}
383
384static int dummy_hrtimer_stop(struct snd_pcm_substream *substream)
385{
386 struct dummy_hrtimer_pcm *dpcm = substream->runtime->private_data;
387
388 atomic_set(&dpcm->running, 0);
389 hrtimer_cancel(&dpcm->timer);
390 return 0;
391}
392
393static inline void dummy_hrtimer_sync(struct dummy_hrtimer_pcm *dpcm)
394{
395 tasklet_kill(&dpcm->tasklet);
396}
397
398static snd_pcm_uframes_t
399dummy_hrtimer_pointer(struct snd_pcm_substream *substream)
276{ 400{
277 struct snd_pcm_runtime *runtime = substream->runtime; 401 struct snd_pcm_runtime *runtime = substream->runtime;
278 struct snd_dummy_pcm *dpcm = runtime->private_data; 402 struct dummy_hrtimer_pcm *dpcm = runtime->private_data;
403 u64 delta;
404 u32 pos;
405
406 delta = ktime_us_delta(hrtimer_cb_get_time(&dpcm->timer),
407 dpcm->base_time);
408 delta = div_u64(delta * runtime->rate + 999999, 1000000);
409 div_u64_rem(delta, runtime->buffer_size, &pos);
410 return pos;
411}
279 412
280 return bytes_to_frames(runtime, dpcm->pcm_buf_pos / dpcm->pcm_hz); 413static int dummy_hrtimer_prepare(struct snd_pcm_substream *substream)
414{
415 struct snd_pcm_runtime *runtime = substream->runtime;
416 struct dummy_hrtimer_pcm *dpcm = runtime->private_data;
417 unsigned int period, rate;
418 long sec;
419 unsigned long nsecs;
420
421 dummy_hrtimer_sync(dpcm);
422 period = runtime->period_size;
423 rate = runtime->rate;
424 sec = period / rate;
425 period %= rate;
426 nsecs = div_u64((u64)period * 1000000000UL + rate - 1, rate);
427 dpcm->period_time = ktime_set(sec, nsecs);
428
429 return 0;
281} 430}
282 431
283static struct snd_pcm_hardware snd_card_dummy_playback = 432static int dummy_hrtimer_create(struct snd_pcm_substream *substream)
284{ 433{
285 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | 434 struct dummy_hrtimer_pcm *dpcm;
286 SNDRV_PCM_INFO_RESUME | SNDRV_PCM_INFO_MMAP_VALID), 435
287 .formats = USE_FORMATS, 436 dpcm = kzalloc(sizeof(*dpcm), GFP_KERNEL);
288 .rates = USE_RATE, 437 if (!dpcm)
289 .rate_min = USE_RATE_MIN, 438 return -ENOMEM;
290 .rate_max = USE_RATE_MAX, 439 substream->runtime->private_data = dpcm;
291 .channels_min = USE_CHANNELS_MIN, 440 hrtimer_init(&dpcm->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
292 .channels_max = USE_CHANNELS_MAX, 441 dpcm->timer.function = dummy_hrtimer_callback;
293 .buffer_bytes_max = MAX_BUFFER_SIZE, 442 dpcm->substream = substream;
294 .period_bytes_min = 64, 443 atomic_set(&dpcm->running, 0);
295 .period_bytes_max = MAX_PERIOD_SIZE, 444 tasklet_init(&dpcm->tasklet, dummy_hrtimer_pcm_elapsed,
296 .periods_min = USE_PERIODS_MIN, 445 (unsigned long)dpcm);
297 .periods_max = USE_PERIODS_MAX, 446 return 0;
298 .fifo_size = 0, 447}
448
449static void dummy_hrtimer_free(struct snd_pcm_substream *substream)
450{
451 struct dummy_hrtimer_pcm *dpcm = substream->runtime->private_data;
452 dummy_hrtimer_sync(dpcm);
453 kfree(dpcm);
454}
455
456static struct dummy_timer_ops dummy_hrtimer_ops = {
457 .create = dummy_hrtimer_create,
458 .free = dummy_hrtimer_free,
459 .prepare = dummy_hrtimer_prepare,
460 .start = dummy_hrtimer_start,
461 .stop = dummy_hrtimer_stop,
462 .pointer = dummy_hrtimer_pointer,
299}; 463};
300 464
301static struct snd_pcm_hardware snd_card_dummy_capture = 465#endif /* CONFIG_HIGH_RES_TIMERS */
466
467/*
468 * PCM interface
469 */
470
471static int dummy_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
302{ 472{
303 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | 473 struct snd_dummy *dummy = snd_pcm_substream_chip(substream);
304 SNDRV_PCM_INFO_RESUME | SNDRV_PCM_INFO_MMAP_VALID), 474
475 switch (cmd) {
476 case SNDRV_PCM_TRIGGER_START:
477 case SNDRV_PCM_TRIGGER_RESUME:
478 return dummy->timer_ops->start(substream);
479 case SNDRV_PCM_TRIGGER_STOP:
480 case SNDRV_PCM_TRIGGER_SUSPEND:
481 return dummy->timer_ops->stop(substream);
482 }
483 return -EINVAL;
484}
485
486static int dummy_pcm_prepare(struct snd_pcm_substream *substream)
487{
488 struct snd_dummy *dummy = snd_pcm_substream_chip(substream);
489
490 return dummy->timer_ops->prepare(substream);
491}
492
493static snd_pcm_uframes_t dummy_pcm_pointer(struct snd_pcm_substream *substream)
494{
495 struct snd_dummy *dummy = snd_pcm_substream_chip(substream);
496
497 return dummy->timer_ops->pointer(substream);
498}
499
500static struct snd_pcm_hardware dummy_pcm_hardware = {
501 .info = (SNDRV_PCM_INFO_MMAP |
502 SNDRV_PCM_INFO_INTERLEAVED |
503 SNDRV_PCM_INFO_RESUME |
504 SNDRV_PCM_INFO_MMAP_VALID),
305 .formats = USE_FORMATS, 505 .formats = USE_FORMATS,
306 .rates = USE_RATE, 506 .rates = USE_RATE,
307 .rate_min = USE_RATE_MIN, 507 .rate_min = USE_RATE_MIN,
@@ -316,123 +516,152 @@ static struct snd_pcm_hardware snd_card_dummy_capture =
316 .fifo_size = 0, 516 .fifo_size = 0,
317}; 517};
318 518
319static void snd_card_dummy_runtime_free(struct snd_pcm_runtime *runtime) 519static int dummy_pcm_hw_params(struct snd_pcm_substream *substream,
320{ 520 struct snd_pcm_hw_params *hw_params)
321 kfree(runtime->private_data);
322}
323
324static int snd_card_dummy_hw_params(struct snd_pcm_substream *substream,
325 struct snd_pcm_hw_params *hw_params)
326{ 521{
327 return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params)); 522 if (fake_buffer) {
523 /* runtime->dma_bytes has to be set manually to allow mmap */
524 substream->runtime->dma_bytes = params_buffer_bytes(hw_params);
525 return 0;
526 }
527 return snd_pcm_lib_malloc_pages(substream,
528 params_buffer_bytes(hw_params));
328} 529}
329 530
330static int snd_card_dummy_hw_free(struct snd_pcm_substream *substream) 531static int dummy_pcm_hw_free(struct snd_pcm_substream *substream)
331{ 532{
533 if (fake_buffer)
534 return 0;
332 return snd_pcm_lib_free_pages(substream); 535 return snd_pcm_lib_free_pages(substream);
333} 536}
334 537
335static struct snd_dummy_pcm *new_pcm_stream(struct snd_pcm_substream *substream) 538static int dummy_pcm_open(struct snd_pcm_substream *substream)
336{
337 struct snd_dummy_pcm *dpcm;
338
339 dpcm = kzalloc(sizeof(*dpcm), GFP_KERNEL);
340 if (! dpcm)
341 return dpcm;
342 init_timer(&dpcm->timer);
343 dpcm->timer.data = (unsigned long) dpcm;
344 dpcm->timer.function = snd_card_dummy_pcm_timer_function;
345 spin_lock_init(&dpcm->lock);
346 dpcm->substream = substream;
347 return dpcm;
348}
349
350static int snd_card_dummy_playback_open(struct snd_pcm_substream *substream)
351{ 539{
540 struct snd_dummy *dummy = snd_pcm_substream_chip(substream);
352 struct snd_pcm_runtime *runtime = substream->runtime; 541 struct snd_pcm_runtime *runtime = substream->runtime;
353 struct snd_dummy_pcm *dpcm;
354 int err; 542 int err;
355 543
356 if ((dpcm = new_pcm_stream(substream)) == NULL) 544 dummy->timer_ops = &dummy_systimer_ops;
357 return -ENOMEM; 545#ifdef CONFIG_HIGH_RES_TIMERS
358 runtime->private_data = dpcm; 546 if (hrtimer)
359 /* makes the infrastructure responsible for freeing dpcm */ 547 dummy->timer_ops = &dummy_hrtimer_ops;
360 runtime->private_free = snd_card_dummy_runtime_free; 548#endif
361 runtime->hw = snd_card_dummy_playback; 549
550 err = dummy->timer_ops->create(substream);
551 if (err < 0)
552 return err;
553
554 runtime->hw = dummy_pcm_hardware;
362 if (substream->pcm->device & 1) { 555 if (substream->pcm->device & 1) {
363 runtime->hw.info &= ~SNDRV_PCM_INFO_INTERLEAVED; 556 runtime->hw.info &= ~SNDRV_PCM_INFO_INTERLEAVED;
364 runtime->hw.info |= SNDRV_PCM_INFO_NONINTERLEAVED; 557 runtime->hw.info |= SNDRV_PCM_INFO_NONINTERLEAVED;
365 } 558 }
366 if (substream->pcm->device & 2) 559 if (substream->pcm->device & 2)
367 runtime->hw.info &= ~(SNDRV_PCM_INFO_MMAP|SNDRV_PCM_INFO_MMAP_VALID); 560 runtime->hw.info &= ~(SNDRV_PCM_INFO_MMAP |
368 err = add_playback_constraints(runtime); 561 SNDRV_PCM_INFO_MMAP_VALID);
369 if (err < 0) 562
563 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
564 err = add_playback_constraints(substream->runtime);
565 else
566 err = add_capture_constraints(substream->runtime);
567 if (err < 0) {
568 dummy->timer_ops->free(substream);
370 return err; 569 return err;
371 570 }
372 return 0; 571 return 0;
373} 572}
374 573
375static int snd_card_dummy_capture_open(struct snd_pcm_substream *substream) 574static int dummy_pcm_close(struct snd_pcm_substream *substream)
376{ 575{
377 struct snd_pcm_runtime *runtime = substream->runtime; 576 struct snd_dummy *dummy = snd_pcm_substream_chip(substream);
378 struct snd_dummy_pcm *dpcm; 577 dummy->timer_ops->free(substream);
379 int err; 578 return 0;
579}
380 580
381 if ((dpcm = new_pcm_stream(substream)) == NULL) 581/*
382 return -ENOMEM; 582 * dummy buffer handling
383 runtime->private_data = dpcm; 583 */
384 /* makes the infrastructure responsible for freeing dpcm */ 584
385 runtime->private_free = snd_card_dummy_runtime_free; 585static void *dummy_page[2];
386 runtime->hw = snd_card_dummy_capture; 586
387 if (substream->pcm->device == 1) { 587static void free_fake_buffer(void)
388 runtime->hw.info &= ~SNDRV_PCM_INFO_INTERLEAVED; 588{
389 runtime->hw.info |= SNDRV_PCM_INFO_NONINTERLEAVED; 589 if (fake_buffer) {
590 int i;
591 for (i = 0; i < 2; i++)
592 if (dummy_page[i]) {
593 free_page((unsigned long)dummy_page[i]);
594 dummy_page[i] = NULL;
595 }
390 } 596 }
391 if (substream->pcm->device & 2) 597}
392 runtime->hw.info &= ~(SNDRV_PCM_INFO_MMAP|SNDRV_PCM_INFO_MMAP_VALID);
393 err = add_capture_constraints(runtime);
394 if (err < 0)
395 return err;
396 598
599static int alloc_fake_buffer(void)
600{
601 int i;
602
603 if (!fake_buffer)
604 return 0;
605 for (i = 0; i < 2; i++) {
606 dummy_page[i] = (void *)get_zeroed_page(GFP_KERNEL);
607 if (!dummy_page[i]) {
608 free_fake_buffer();
609 return -ENOMEM;
610 }
611 }
397 return 0; 612 return 0;
398} 613}
399 614
400static int snd_card_dummy_playback_close(struct snd_pcm_substream *substream) 615static int dummy_pcm_copy(struct snd_pcm_substream *substream,
616 int channel, snd_pcm_uframes_t pos,
617 void __user *dst, snd_pcm_uframes_t count)
401{ 618{
402 return 0; 619 return 0; /* do nothing */
403} 620}
404 621
405static int snd_card_dummy_capture_close(struct snd_pcm_substream *substream) 622static int dummy_pcm_silence(struct snd_pcm_substream *substream,
623 int channel, snd_pcm_uframes_t pos,
624 snd_pcm_uframes_t count)
406{ 625{
407 return 0; 626 return 0; /* do nothing */
627}
628
629static struct page *dummy_pcm_page(struct snd_pcm_substream *substream,
630 unsigned long offset)
631{
632 return virt_to_page(dummy_page[substream->stream]); /* the same page */
408} 633}
409 634
410static struct snd_pcm_ops snd_card_dummy_playback_ops = { 635static struct snd_pcm_ops dummy_pcm_ops = {
411 .open = snd_card_dummy_playback_open, 636 .open = dummy_pcm_open,
412 .close = snd_card_dummy_playback_close, 637 .close = dummy_pcm_close,
413 .ioctl = snd_pcm_lib_ioctl, 638 .ioctl = snd_pcm_lib_ioctl,
414 .hw_params = snd_card_dummy_hw_params, 639 .hw_params = dummy_pcm_hw_params,
415 .hw_free = snd_card_dummy_hw_free, 640 .hw_free = dummy_pcm_hw_free,
416 .prepare = snd_card_dummy_pcm_prepare, 641 .prepare = dummy_pcm_prepare,
417 .trigger = snd_card_dummy_pcm_trigger, 642 .trigger = dummy_pcm_trigger,
418 .pointer = snd_card_dummy_pcm_pointer, 643 .pointer = dummy_pcm_pointer,
419}; 644};
420 645
421static struct snd_pcm_ops snd_card_dummy_capture_ops = { 646static struct snd_pcm_ops dummy_pcm_ops_no_buf = {
422 .open = snd_card_dummy_capture_open, 647 .open = dummy_pcm_open,
423 .close = snd_card_dummy_capture_close, 648 .close = dummy_pcm_close,
424 .ioctl = snd_pcm_lib_ioctl, 649 .ioctl = snd_pcm_lib_ioctl,
425 .hw_params = snd_card_dummy_hw_params, 650 .hw_params = dummy_pcm_hw_params,
426 .hw_free = snd_card_dummy_hw_free, 651 .hw_free = dummy_pcm_hw_free,
427 .prepare = snd_card_dummy_pcm_prepare, 652 .prepare = dummy_pcm_prepare,
428 .trigger = snd_card_dummy_pcm_trigger, 653 .trigger = dummy_pcm_trigger,
429 .pointer = snd_card_dummy_pcm_pointer, 654 .pointer = dummy_pcm_pointer,
655 .copy = dummy_pcm_copy,
656 .silence = dummy_pcm_silence,
657 .page = dummy_pcm_page,
430}; 658};
431 659
432static int __devinit snd_card_dummy_pcm(struct snd_dummy *dummy, int device, 660static int __devinit snd_card_dummy_pcm(struct snd_dummy *dummy, int device,
433 int substreams) 661 int substreams)
434{ 662{
435 struct snd_pcm *pcm; 663 struct snd_pcm *pcm;
664 struct snd_pcm_ops *ops;
436 int err; 665 int err;
437 666
438 err = snd_pcm_new(dummy->card, "Dummy PCM", device, 667 err = snd_pcm_new(dummy->card, "Dummy PCM", device,
@@ -440,17 +669,28 @@ static int __devinit snd_card_dummy_pcm(struct snd_dummy *dummy, int device,
440 if (err < 0) 669 if (err < 0)
441 return err; 670 return err;
442 dummy->pcm = pcm; 671 dummy->pcm = pcm;
443 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_card_dummy_playback_ops); 672 if (fake_buffer)
444 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_card_dummy_capture_ops); 673 ops = &dummy_pcm_ops_no_buf;
674 else
675 ops = &dummy_pcm_ops;
676 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, ops);
677 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, ops);
445 pcm->private_data = dummy; 678 pcm->private_data = dummy;
446 pcm->info_flags = 0; 679 pcm->info_flags = 0;
447 strcpy(pcm->name, "Dummy PCM"); 680 strcpy(pcm->name, "Dummy PCM");
448 snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS, 681 if (!fake_buffer) {
449 snd_dma_continuous_data(GFP_KERNEL), 682 snd_pcm_lib_preallocate_pages_for_all(pcm,
450 0, 64*1024); 683 SNDRV_DMA_TYPE_CONTINUOUS,
684 snd_dma_continuous_data(GFP_KERNEL),
685 0, 64*1024);
686 }
451 return 0; 687 return 0;
452} 688}
453 689
690/*
691 * mixer interface
692 */
693
454#define DUMMY_VOLUME(xname, xindex, addr) \ 694#define DUMMY_VOLUME(xname, xindex, addr) \
455{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \ 695{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
456 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_TLV_READ, \ 696 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_TLV_READ, \
@@ -581,6 +821,131 @@ static int __devinit snd_card_dummy_new_mixer(struct snd_dummy *dummy)
581 return 0; 821 return 0;
582} 822}
583 823
824#if defined(CONFIG_SND_DEBUG) && defined(CONFIG_PROC_FS)
825/*
826 * proc interface
827 */
828static void print_formats(struct snd_info_buffer *buffer)
829{
830 int i;
831
832 for (i = 0; i < SNDRV_PCM_FORMAT_LAST; i++) {
833 if (dummy_pcm_hardware.formats & (1ULL << i))
834 snd_iprintf(buffer, " %s", snd_pcm_format_name(i));
835 }
836}
837
838static void print_rates(struct snd_info_buffer *buffer)
839{
840 static int rates[] = {
841 5512, 8000, 11025, 16000, 22050, 32000, 44100, 48000,
842 64000, 88200, 96000, 176400, 192000,
843 };
844 int i;
845
846 if (dummy_pcm_hardware.rates & SNDRV_PCM_RATE_CONTINUOUS)
847 snd_iprintf(buffer, " continuous");
848 if (dummy_pcm_hardware.rates & SNDRV_PCM_RATE_KNOT)
849 snd_iprintf(buffer, " knot");
850 for (i = 0; i < ARRAY_SIZE(rates); i++)
851 if (dummy_pcm_hardware.rates & (1 << i))
852 snd_iprintf(buffer, " %d", rates[i]);
853}
854
855#define get_dummy_int_ptr(ofs) \
856 (unsigned int *)((char *)&dummy_pcm_hardware + (ofs))
857#define get_dummy_ll_ptr(ofs) \
858 (unsigned long long *)((char *)&dummy_pcm_hardware + (ofs))
859
860struct dummy_hw_field {
861 const char *name;
862 const char *format;
863 unsigned int offset;
864 unsigned int size;
865};
866#define FIELD_ENTRY(item, fmt) { \
867 .name = #item, \
868 .format = fmt, \
869 .offset = offsetof(struct snd_pcm_hardware, item), \
870 .size = sizeof(dummy_pcm_hardware.item) }
871
872static struct dummy_hw_field fields[] = {
873 FIELD_ENTRY(formats, "%#llx"),
874 FIELD_ENTRY(rates, "%#x"),
875 FIELD_ENTRY(rate_min, "%d"),
876 FIELD_ENTRY(rate_max, "%d"),
877 FIELD_ENTRY(channels_min, "%d"),
878 FIELD_ENTRY(channels_max, "%d"),
879 FIELD_ENTRY(buffer_bytes_max, "%ld"),
880 FIELD_ENTRY(period_bytes_min, "%ld"),
881 FIELD_ENTRY(period_bytes_max, "%ld"),
882 FIELD_ENTRY(periods_min, "%d"),
883 FIELD_ENTRY(periods_max, "%d"),
884};
885
886static void dummy_proc_read(struct snd_info_entry *entry,
887 struct snd_info_buffer *buffer)
888{
889 int i;
890
891 for (i = 0; i < ARRAY_SIZE(fields); i++) {
892 snd_iprintf(buffer, "%s ", fields[i].name);
893 if (fields[i].size == sizeof(int))
894 snd_iprintf(buffer, fields[i].format,
895 *get_dummy_int_ptr(fields[i].offset));
896 else
897 snd_iprintf(buffer, fields[i].format,
898 *get_dummy_ll_ptr(fields[i].offset));
899 if (!strcmp(fields[i].name, "formats"))
900 print_formats(buffer);
901 else if (!strcmp(fields[i].name, "rates"))
902 print_rates(buffer);
903 snd_iprintf(buffer, "\n");
904 }
905}
906
907static void dummy_proc_write(struct snd_info_entry *entry,
908 struct snd_info_buffer *buffer)
909{
910 char line[64];
911
912 while (!snd_info_get_line(buffer, line, sizeof(line))) {
913 char item[20];
914 const char *ptr;
915 unsigned long long val;
916 int i;
917
918 ptr = snd_info_get_str(item, line, sizeof(item));
919 for (i = 0; i < ARRAY_SIZE(fields); i++) {
920 if (!strcmp(item, fields[i].name))
921 break;
922 }
923 if (i >= ARRAY_SIZE(fields))
924 continue;
925 snd_info_get_str(item, ptr, sizeof(item));
926 if (strict_strtoull(item, 0, &val))
927 continue;
928 if (fields[i].size == sizeof(int))
929 *get_dummy_int_ptr(fields[i].offset) = val;
930 else
931 *get_dummy_ll_ptr(fields[i].offset) = val;
932 }
933}
934
935static void __devinit dummy_proc_init(struct snd_dummy *chip)
936{
937 struct snd_info_entry *entry;
938
939 if (!snd_card_proc_new(chip->card, "dummy_pcm", &entry)) {
940 snd_info_set_text_ops(entry, chip, dummy_proc_read);
941 entry->c.text.write = dummy_proc_write;
942 entry->mode |= S_IWUSR;
943 }
944}
945#else
946#define dummy_proc_init(x)
947#endif /* CONFIG_SND_DEBUG && CONFIG_PROC_FS */
948
584static int __devinit snd_dummy_probe(struct platform_device *devptr) 949static int __devinit snd_dummy_probe(struct platform_device *devptr)
585{ 950{
586 struct snd_card *card; 951 struct snd_card *card;
@@ -610,6 +975,8 @@ static int __devinit snd_dummy_probe(struct platform_device *devptr)
610 strcpy(card->shortname, "Dummy"); 975 strcpy(card->shortname, "Dummy");
611 sprintf(card->longname, "Dummy %i", dev + 1); 976 sprintf(card->longname, "Dummy %i", dev + 1);
612 977
978 dummy_proc_init(dummy);
979
613 snd_card_set_dev(card, &devptr->dev); 980 snd_card_set_dev(card, &devptr->dev);
614 981
615 err = snd_card_register(card); 982 err = snd_card_register(card);
@@ -670,6 +1037,7 @@ static void snd_dummy_unregister_all(void)
670 for (i = 0; i < ARRAY_SIZE(devices); ++i) 1037 for (i = 0; i < ARRAY_SIZE(devices); ++i)
671 platform_device_unregister(devices[i]); 1038 platform_device_unregister(devices[i]);
672 platform_driver_unregister(&snd_dummy_driver); 1039 platform_driver_unregister(&snd_dummy_driver);
1040 free_fake_buffer();
673} 1041}
674 1042
675static int __init alsa_card_dummy_init(void) 1043static int __init alsa_card_dummy_init(void)
@@ -680,6 +1048,12 @@ static int __init alsa_card_dummy_init(void)
680 if (err < 0) 1048 if (err < 0)
681 return err; 1049 return err;
682 1050
1051 err = alloc_fake_buffer();
1052 if (err < 0) {
1053 platform_driver_unregister(&snd_dummy_driver);
1054 return err;
1055 }
1056
683 cards = 0; 1057 cards = 0;
684 for (i = 0; i < SNDRV_CARDS; i++) { 1058 for (i = 0; i < SNDRV_CARDS; i++) {
685 struct platform_device *device; 1059 struct platform_device *device;
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-28 17:02:58 -0500