1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Linux driver for TerraTec DMX 6Fire USB
4 *
5 * PCM driver
6 *
7 * Author: Torsten Schenk <torsten.schenk@zoho.com>
8 * Created: Jan 01, 2011
9 * Copyright: (C) Torsten Schenk
10 */
11
12 #include "pcm.h"
13 #include "chip.h"
14 #include "comm.h"
15 #include "control.h"
16
17 enum {
18 OUT_N_CHANNELS = 6, IN_N_CHANNELS = 4
19 };
20
21 /* keep next two synced with
22 * FW_EP_W_MAX_PACKET_SIZE[] and RATES_MAX_PACKET_SIZE
23 * and CONTROL_RATE_XXX in control.h */
24 static const int rates_in_packet_size[] = { 228, 228, 420, 420, 404, 404 };
25 static const int rates_out_packet_size[] = { 228, 228, 420, 420, 604, 604 };
26 static const int rates[] = { 44100, 48000, 88200, 96000, 176400, 192000 };
27 static const int rates_alsaid[] = {
28 SNDRV_PCM_RATE_44100, SNDRV_PCM_RATE_48000,
29 SNDRV_PCM_RATE_88200, SNDRV_PCM_RATE_96000,
30 SNDRV_PCM_RATE_176400, SNDRV_PCM_RATE_192000 };
31
32 enum { /* settings for pcm */
33 OUT_EP = 6, IN_EP = 2, MAX_BUFSIZE = 128 * 1024
34 };
35
36 enum { /* pcm streaming states */
37 STREAM_DISABLED, /* no pcm streaming */
38 STREAM_STARTING, /* pcm streaming requested, waiting to become ready */
39 STREAM_RUNNING, /* pcm streaming running */
40 STREAM_STOPPING
41 };
42
43 static const struct snd_pcm_hardware pcm_hw = {
44 .info = SNDRV_PCM_INFO_MMAP |
45 SNDRV_PCM_INFO_INTERLEAVED |
46 SNDRV_PCM_INFO_BLOCK_TRANSFER |
47 SNDRV_PCM_INFO_MMAP_VALID |
48 SNDRV_PCM_INFO_BATCH,
49
50 .formats = SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE,
51
52 .rates = SNDRV_PCM_RATE_44100 |
53 SNDRV_PCM_RATE_48000 |
54 SNDRV_PCM_RATE_88200 |
55 SNDRV_PCM_RATE_96000 |
56 SNDRV_PCM_RATE_176400 |
57 SNDRV_PCM_RATE_192000,
58
59 .rate_min = 44100,
60 .rate_max = 192000,
61 .channels_min = 1,
62 .channels_max = 0, /* set in pcm_open, depending on capture/playback */
63 .buffer_bytes_max = MAX_BUFSIZE,
64 .period_bytes_min = PCM_N_PACKETS_PER_URB * (PCM_MAX_PACKET_SIZE - 4),
65 .period_bytes_max = MAX_BUFSIZE,
66 .periods_min = 2,
67 .periods_max = 1024
68 };
69
70 static int usb6fire_pcm_set_rate(struct pcm_runtime *rt)
71 {
72 int ret;
73 struct control_runtime *ctrl_rt = rt->chip->control;
74
75 ctrl_rt->usb_streaming = false;
76 ret = ctrl_rt->update_streaming(ctrl_rt);
77 if (ret < 0) {
78 dev_err(&rt->chip->dev->dev,
79 "error stopping streaming while setting samplerate %d.\n",
80 rates[rt->rate]);
81 return ret;
82 }
83
84 ret = ctrl_rt->set_rate(ctrl_rt, rt->rate);
85 if (ret < 0) {
86 dev_err(&rt->chip->dev->dev,
87 "error setting samplerate %d.\n",
88 rates[rt->rate]);
89 return ret;
90 }
91
92 ret = ctrl_rt->set_channels(ctrl_rt, OUT_N_CHANNELS, IN_N_CHANNELS,
93 false, false);
94 if (ret < 0) {
95 dev_err(&rt->chip->dev->dev,
96 "error initializing channels while setting samplerate %d.\n",
97 rates[rt->rate]);
98 return ret;
99 }
100
101 ctrl_rt->usb_streaming = true;
102 ret = ctrl_rt->update_streaming(ctrl_rt);
103 if (ret < 0) {
104 dev_err(&rt->chip->dev->dev,
105 "error starting streaming while setting samplerate %d.\n",
106 rates[rt->rate]);
107 return ret;
108 }
109
110 rt->in_n_analog = IN_N_CHANNELS;
111 rt->out_n_analog = OUT_N_CHANNELS;
112 rt->in_packet_size = rates_in_packet_size[rt->rate];
113 rt->out_packet_size = rates_out_packet_size[rt->rate];
114 return 0;
115 }
116
117 static struct pcm_substream *usb6fire_pcm_get_substream(
118 struct snd_pcm_substream *alsa_sub)
119 {
120 struct pcm_runtime *rt = snd_pcm_substream_chip(alsa_sub);
121
122 if (alsa_sub->stream == SNDRV_PCM_STREAM_PLAYBACK)
123 return &rt->playback;
124 else if (alsa_sub->stream == SNDRV_PCM_STREAM_CAPTURE)
125 return &rt->capture;
126 dev_err(&rt->chip->dev->dev, "error getting pcm substream slot.\n");
127 return NULL;
128 }
129
130 /* call with stream_mutex locked */
131 static void usb6fire_pcm_stream_stop(struct pcm_runtime *rt)
132 {
133 int i;
134 struct control_runtime *ctrl_rt = rt->chip->control;
135
136 if (rt->stream_state != STREAM_DISABLED) {
137
138 rt->stream_state = STREAM_STOPPING;
139
140 for (i = 0; i < PCM_N_URBS; i++) {
141 usb_kill_urb(&rt->in_urbs[i].instance);
142 usb_kill_urb(&rt->out_urbs[i].instance);
143 }
144 ctrl_rt->usb_streaming = false;
145 ctrl_rt->update_streaming(ctrl_rt);
146 rt->stream_state = STREAM_DISABLED;
147 }
148 }
149
150 /* call with stream_mutex locked */
151 static int usb6fire_pcm_stream_start(struct pcm_runtime *rt)
152 {
153 int ret;
154 int i;
155 int k;
156 struct usb_iso_packet_descriptor *packet;
157
158 if (rt->stream_state == STREAM_DISABLED) {
159 /* submit our in urbs */
160 rt->stream_wait_cond = false;
161 rt->stream_state = STREAM_STARTING;
162 for (i = 0; i < PCM_N_URBS; i++) {
163 for (k = 0; k < PCM_N_PACKETS_PER_URB; k++) {
164 packet = &rt->in_urbs[i].packets[k];
165 packet->offset = k * rt->in_packet_size;
166 packet->length = rt->in_packet_size;
167 packet->actual_length = 0;
168 packet->status = 0;
169 }
170 ret = usb_submit_urb(&rt->in_urbs[i].instance,
171 GFP_ATOMIC);
172 if (ret) {
173 usb6fire_pcm_stream_stop(rt);
174 return ret;
175 }
176 }
177
178 /* wait for first out urb to return (sent in urb handler) */
179 wait_event_timeout(rt->stream_wait_queue, rt->stream_wait_cond,
180 HZ);
181 if (rt->stream_wait_cond)
182 rt->stream_state = STREAM_RUNNING;
183 else {
184 usb6fire_pcm_stream_stop(rt);
185 return -EIO;
186 }
187 }
188 return 0;
189 }
190
191 /* call with substream locked */
192 static void usb6fire_pcm_capture(struct pcm_substream *sub, struct pcm_urb *urb)
193 {
194 int i;
195 int frame;
196 int frame_count;
197 unsigned int total_length = 0;
198 struct pcm_runtime *rt = snd_pcm_substream_chip(sub->instance);
199 struct snd_pcm_runtime *alsa_rt = sub->instance->runtime;
200 u32 *src = NULL;
201 u32 *dest = (u32 *) (alsa_rt->dma_area + sub->dma_off
202 * (alsa_rt->frame_bits >> 3));
203 u32 *dest_end = (u32 *) (alsa_rt->dma_area + alsa_rt->buffer_size
204 * (alsa_rt->frame_bits >> 3));
205 int bytes_per_frame = alsa_rt->channels << 2;
206
207 for (i = 0; i < PCM_N_PACKETS_PER_URB; i++) {
208 /* at least 4 header bytes for valid packet.
209 * after that: 32 bits per sample for analog channels */
210 if (urb->packets[i].actual_length > 4)
211 frame_count = (urb->packets[i].actual_length - 4)
212 / (rt->in_n_analog << 2);
213 else
214 frame_count = 0;
215
216 if (alsa_rt->format == SNDRV_PCM_FORMAT_S24_LE)
217 src = (u32 *) (urb->buffer + total_length);
218 else if (alsa_rt->format == SNDRV_PCM_FORMAT_S32_LE)
219 src = (u32 *) (urb->buffer - 1 + total_length);
220 else
221 return;
222 src++; /* skip leading 4 bytes of every packet */
223 total_length += urb->packets[i].length;
224 for (frame = 0; frame < frame_count; frame++) {
225 memcpy(dest, src, bytes_per_frame);
226 dest += alsa_rt->channels;
227 src += rt->in_n_analog;
228 sub->dma_off++;
229 sub->period_off++;
230 if (dest == dest_end) {
231 sub->dma_off = 0;
232 dest = (u32 *) alsa_rt->dma_area;
233 }
234 }
235 }
236 }
237
238 /* call with substream locked */
239 static void usb6fire_pcm_playback(struct pcm_substream *sub,
240 struct pcm_urb *urb)
241 {
242 int i;
243 int frame;
244 int frame_count;
245 struct pcm_runtime *rt = snd_pcm_substream_chip(sub->instance);
246 struct snd_pcm_runtime *alsa_rt = sub->instance->runtime;
247 u32 *src = (u32 *) (alsa_rt->dma_area + sub->dma_off
248 * (alsa_rt->frame_bits >> 3));
249 u32 *src_end = (u32 *) (alsa_rt->dma_area + alsa_rt->buffer_size
250 * (alsa_rt->frame_bits >> 3));
251 u32 *dest;
252 int bytes_per_frame = alsa_rt->channels << 2;
253
254 if (alsa_rt->format == SNDRV_PCM_FORMAT_S32_LE)
255 dest = (u32 *) (urb->buffer - 1);
256 else if (alsa_rt->format == SNDRV_PCM_FORMAT_S24_LE)
257 dest = (u32 *) (urb->buffer);
258 else {
259 dev_err(&rt->chip->dev->dev, "Unknown sample format.");
260 return;
261 }
262
263 for (i = 0; i < PCM_N_PACKETS_PER_URB; i++) {
264 /* at least 4 header bytes for valid packet.
265 * after that: 32 bits per sample for analog channels */
266 if (urb->packets[i].length > 4)
267 frame_count = (urb->packets[i].length - 4)
268 / (rt->out_n_analog << 2);
269 else
270 frame_count = 0;
271 dest++; /* skip leading 4 bytes of every frame */
272 for (frame = 0; frame < frame_count; frame++) {
273 memcpy(dest, src, bytes_per_frame);
274 src += alsa_rt->channels;
275 dest += rt->out_n_analog;
276 sub->dma_off++;
277 sub->period_off++;
278 if (src == src_end) {
279 src = (u32 *) alsa_rt->dma_area;
280 sub->dma_off = 0;
281 }
282 }
283 }
284 }
285
286 static void usb6fire_pcm_in_urb_handler(struct urb *usb_urb)
287 {
288 struct pcm_urb *in_urb = usb_urb->context;
289 struct pcm_urb *out_urb = in_urb->peer;
290 struct pcm_runtime *rt = in_urb->chip->pcm;
291 struct pcm_substream *sub;
292 unsigned long flags;
293 int total_length = 0;
294 int frame_count;
295 int frame;
296 int channel;
297 int i;
298 u8 *dest;
299
300 if (usb_urb->status || rt->panic || rt->stream_state == STREAM_STOPPING)
301 return;
302 for (i = 0; i < PCM_N_PACKETS_PER_URB; i++)
303 if (in_urb->packets[i].status) {
304 rt->panic = true;
305 return;
306 }
307
308 if (rt->stream_state == STREAM_DISABLED) {
309 dev_err(&rt->chip->dev->dev,
310 "internal error: stream disabled in in-urb handler.\n");
311 return;
312 }
313
314 /* receive our capture data */
315 sub = &rt->capture;
316 spin_lock_irqsave(&sub->lock, flags);
317 if (sub->active) {
318 usb6fire_pcm_capture(sub, in_urb);
319 if (sub->period_off >= sub->instance->runtime->period_size) {
320 sub->period_off %= sub->instance->runtime->period_size;
321 spin_unlock_irqrestore(&sub->lock, flags);
322 snd_pcm_period_elapsed(sub->instance);
323 } else
324 spin_unlock_irqrestore(&sub->lock, flags);
325 } else
326 spin_unlock_irqrestore(&sub->lock, flags);
327
328 /* setup out urb structure */
329 for (i = 0; i < PCM_N_PACKETS_PER_URB; i++) {
330 out_urb->packets[i].offset = total_length;
331 out_urb->packets[i].length = (in_urb->packets[i].actual_length
332 - 4) / (rt->in_n_analog << 2)
333 * (rt->out_n_analog << 2) + 4;
334 out_urb->packets[i].status = 0;
335 total_length += out_urb->packets[i].length;
336 }
337 memset(out_urb->buffer, 0, total_length);
338
339 /* now send our playback data (if a free out urb was found) */
340 sub = &rt->playback;
341 spin_lock_irqsave(&sub->lock, flags);
342 if (sub->active) {
343 usb6fire_pcm_playback(sub, out_urb);
344 if (sub->period_off >= sub->instance->runtime->period_size) {
345 sub->period_off %= sub->instance->runtime->period_size;
346 spin_unlock_irqrestore(&sub->lock, flags);
347 snd_pcm_period_elapsed(sub->instance);
348 } else
349 spin_unlock_irqrestore(&sub->lock, flags);
350 } else
351 spin_unlock_irqrestore(&sub->lock, flags);
352
353 /* setup the 4th byte of each sample (0x40 for analog channels) */
354 dest = out_urb->buffer;
355 for (i = 0; i < PCM_N_PACKETS_PER_URB; i++)
356 if (out_urb->packets[i].length >= 4) {
357 frame_count = (out_urb->packets[i].length - 4)
358 / (rt->out_n_analog << 2);
359 *(dest++) = 0xaa;
360 *(dest++) = 0xaa;
361 *(dest++) = frame_count;
362 *(dest++) = 0x00;
363 for (frame = 0; frame < frame_count; frame++)
364 for (channel = 0;
365 channel < rt->out_n_analog;
366 channel++) {
367 dest += 3; /* skip sample data */
368 *(dest++) = 0x40;
369 }
370 }
371 usb_submit_urb(&out_urb->instance, GFP_ATOMIC);
372 usb_submit_urb(&in_urb->instance, GFP_ATOMIC);
373 }
374
375 static void usb6fire_pcm_out_urb_handler(struct urb *usb_urb)
376 {
377 struct pcm_urb *urb = usb_urb->context;
378 struct pcm_runtime *rt = urb->chip->pcm;
379
380 if (rt->stream_state == STREAM_STARTING) {
381 rt->stream_wait_cond = true;
382 wake_up(&rt->stream_wait_queue);
383 }
384 }
385
386 static int usb6fire_pcm_open(struct snd_pcm_substream *alsa_sub)
387 {
388 struct pcm_runtime *rt = snd_pcm_substream_chip(alsa_sub);
389 struct pcm_substream *sub = NULL;
390 struct snd_pcm_runtime *alsa_rt = alsa_sub->runtime;
391
392 if (rt->panic)
393 return -EPIPE;
394
395 mutex_lock(&rt->stream_mutex);
396 alsa_rt->hw = pcm_hw;
397
398 if (alsa_sub->stream == SNDRV_PCM_STREAM_PLAYBACK) {
399 if (rt->rate < ARRAY_SIZE(rates))
400 alsa_rt->hw.rates = rates_alsaid[rt->rate];
401 alsa_rt->hw.channels_max = OUT_N_CHANNELS;
402 sub = &rt->playback;
403 } else if (alsa_sub->stream == SNDRV_PCM_STREAM_CAPTURE) {
404 if (rt->rate < ARRAY_SIZE(rates))
405 alsa_rt->hw.rates = rates_alsaid[rt->rate];
406 alsa_rt->hw.channels_max = IN_N_CHANNELS;
407 sub = &rt->capture;
408 }
409
410 if (!sub) {
411 mutex_unlock(&rt->stream_mutex);
412 dev_err(&rt->chip->dev->dev, "invalid stream type.\n");
413 return -EINVAL;
414 }
415
416 sub->instance = alsa_sub;
417 sub->active = false;
418 mutex_unlock(&rt->stream_mutex);
419 return 0;
420 }
421
422 static int usb6fire_pcm_close(struct snd_pcm_substream *alsa_sub)
423 {
424 struct pcm_runtime *rt = snd_pcm_substream_chip(alsa_sub);
425 struct pcm_substream *sub = usb6fire_pcm_get_substream(alsa_sub);
426 unsigned long flags;
427
428 if (rt->panic)
429 return 0;
430
431 mutex_lock(&rt->stream_mutex);
432 if (sub) {
433 /* deactivate substream */
434 spin_lock_irqsave(&sub->lock, flags);
435 sub->instance = NULL;
436 sub->active = false;
437 spin_unlock_irqrestore(&sub->lock, flags);
438
439 /* all substreams closed? if so, stop streaming */
440 if (!rt->playback.instance && !rt->capture.instance) {
441 usb6fire_pcm_stream_stop(rt);
442 rt->rate = ARRAY_SIZE(rates);
443 }
444 }
445 mutex_unlock(&rt->stream_mutex);
446 return 0;
447 }
448
449 static int usb6fire_pcm_prepare(struct snd_pcm_substream *alsa_sub)
450 {
451 struct pcm_runtime *rt = snd_pcm_substream_chip(alsa_sub);
452 struct pcm_substream *sub = usb6fire_pcm_get_substream(alsa_sub);
453 struct snd_pcm_runtime *alsa_rt = alsa_sub->runtime;
454 int ret;
455
456 if (rt->panic)
457 return -EPIPE;
458 if (!sub)
459 return -ENODEV;
460
461 mutex_lock(&rt->stream_mutex);
462 sub->dma_off = 0;
463 sub->period_off = 0;
464
465 if (rt->stream_state == STREAM_DISABLED) {
466 for (rt->rate = 0; rt->rate < ARRAY_SIZE(rates); rt->rate++)
467 if (alsa_rt->rate == rates[rt->rate])
468 break;
469 if (rt->rate == ARRAY_SIZE(rates)) {
470 mutex_unlock(&rt->stream_mutex);
471 dev_err(&rt->chip->dev->dev,
472 "invalid rate %d in prepare.\n",
473 alsa_rt->rate);
474 return -EINVAL;
475 }
476
477 ret = usb6fire_pcm_set_rate(rt);
478 if (ret) {
479 mutex_unlock(&rt->stream_mutex);
480 return ret;
481 }
482 ret = usb6fire_pcm_stream_start(rt);
483 if (ret) {
484 mutex_unlock(&rt->stream_mutex);
485 dev_err(&rt->chip->dev->dev,
486 "could not start pcm stream.\n");
487 return ret;
488 }
489 }
490 mutex_unlock(&rt->stream_mutex);
491 return 0;
492 }
493
494 static int usb6fire_pcm_trigger(struct snd_pcm_substream *alsa_sub, int cmd)
495 {
496 struct pcm_substream *sub = usb6fire_pcm_get_substream(alsa_sub);
497 struct pcm_runtime *rt = snd_pcm_substream_chip(alsa_sub);
498 unsigned long flags;
499
500 if (rt->panic)
501 return -EPIPE;
502 if (!sub)
503 return -ENODEV;
504
505 switch (cmd) {
506 case SNDRV_PCM_TRIGGER_START:
507 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
508 spin_lock_irqsave(&sub->lock, flags);
509 sub->active = true;
510 spin_unlock_irqrestore(&sub->lock, flags);
511 return 0;
512
513 case SNDRV_PCM_TRIGGER_STOP:
514 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
515 spin_lock_irqsave(&sub->lock, flags);
516 sub->active = false;
517 spin_unlock_irqrestore(&sub->lock, flags);
518 return 0;
519
520 default:
521 return -EINVAL;
522 }
523 }
524
525 static snd_pcm_uframes_t usb6fire_pcm_pointer(
526 struct snd_pcm_substream *alsa_sub)
527 {
528 struct pcm_substream *sub = usb6fire_pcm_get_substream(alsa_sub);
529 struct pcm_runtime *rt = snd_pcm_substream_chip(alsa_sub);
530 unsigned long flags;
531 snd_pcm_uframes_t ret;
532
533 if (rt->panic || !sub)
534 return SNDRV_PCM_POS_XRUN;
535
536 spin_lock_irqsave(&sub->lock, flags);
537 ret = sub->dma_off;
538 spin_unlock_irqrestore(&sub->lock, flags);
539 return ret;
540 }
541
542 static const struct snd_pcm_ops pcm_ops = {
543 .open = usb6fire_pcm_open,
544 .close = usb6fire_pcm_close,
545 .prepare = usb6fire_pcm_prepare,
546 .trigger = usb6fire_pcm_trigger,
547 .pointer = usb6fire_pcm_pointer,
548 };
549
550 static void usb6fire_pcm_init_urb(struct pcm_urb *urb,
551 struct sfire_chip *chip, bool in, int ep,
552 void (*handler)(struct urb *))
553 {
554 urb->chip = chip;
555 usb_init_urb(&urb->instance);
556 urb->instance.transfer_buffer = urb->buffer;
557 urb->instance.transfer_buffer_length =
558 PCM_N_PACKETS_PER_URB * PCM_MAX_PACKET_SIZE;
559 urb->instance.dev = chip->dev;
560 urb->instance.pipe = in ? usb_rcvisocpipe(chip->dev, ep)
561 : usb_sndisocpipe(chip->dev, ep);
562 urb->instance.interval = 1;
563 urb->instance.complete = handler;
564 urb->instance.context = urb;
565 urb->instance.number_of_packets = PCM_N_PACKETS_PER_URB;
566 }
567
568 static int usb6fire_pcm_buffers_init(struct pcm_runtime *rt)
569 {
570 int i;
571
572 for (i = 0; i < PCM_N_URBS; i++) {
573 rt->out_urbs[i].buffer = kcalloc(PCM_MAX_PACKET_SIZE,
574 PCM_N_PACKETS_PER_URB,
575 GFP_KERNEL);
576 if (!rt->out_urbs[i].buffer)
577 return -ENOMEM;
578 rt->in_urbs[i].buffer = kcalloc(PCM_MAX_PACKET_SIZE,
579 PCM_N_PACKETS_PER_URB,
580 GFP_KERNEL);
581 if (!rt->in_urbs[i].buffer)
582 return -ENOMEM;
583 }
584 return 0;
585 }
586
587 static void usb6fire_pcm_buffers_destroy(struct pcm_runtime *rt)
588 {
589 int i;
590
591 for (i = 0; i < PCM_N_URBS; i++) {
592 kfree(rt->out_urbs[i].buffer);
593 kfree(rt->in_urbs[i].buffer);
594 }
595 }
596
597 int usb6fire_pcm_init(struct sfire_chip *chip)
598 {
599 int i;
600 int ret;
601 struct snd_pcm *pcm;
602 struct pcm_runtime *rt =
603 kzalloc(sizeof(struct pcm_runtime), GFP_KERNEL);
604
605 if (!rt)
606 return -ENOMEM;
607
608 ret = usb6fire_pcm_buffers_init(rt);
609 if (ret) {
610 usb6fire_pcm_buffers_destroy(rt);
611 kfree(rt);
612 return ret;
613 }
614
615 rt->chip = chip;
616 rt->stream_state = STREAM_DISABLED;
617 rt->rate = ARRAY_SIZE(rates);
618 init_waitqueue_head(&rt->stream_wait_queue);
619 mutex_init(&rt->stream_mutex);
620
621 spin_lock_init(&rt->playback.lock);
622 spin_lock_init(&rt->capture.lock);
623
624 for (i = 0; i < PCM_N_URBS; i++) {
625 usb6fire_pcm_init_urb(&rt->in_urbs[i], chip, true, IN_EP,
626 usb6fire_pcm_in_urb_handler);
627 usb6fire_pcm_init_urb(&rt->out_urbs[i], chip, false, OUT_EP,
628 usb6fire_pcm_out_urb_handler);
629
630 rt->in_urbs[i].peer = &rt->out_urbs[i];
631 rt->out_urbs[i].peer = &rt->in_urbs[i];
632 }
633
634 ret = snd_pcm_new(chip->card, "DMX6FireUSB", 0, 1, 1, &pcm);
635 if (ret < 0) {
636 usb6fire_pcm_buffers_destroy(rt);
637 kfree(rt);
638 dev_err(&chip->dev->dev, "cannot create pcm instance.\n");
639 return ret;
640 }
641
642 pcm->private_data = rt;
643 strcpy(pcm->name, "DMX 6Fire USB");
644 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &pcm_ops);
645 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &pcm_ops);
646 snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_VMALLOC, NULL, 0, 0);
647
648 rt->instance = pcm;
649
650 chip->pcm = rt;
651 return 0;
652 }
653
654 void usb6fire_pcm_abort(struct sfire_chip *chip)
655 {
656 struct pcm_runtime *rt = chip->pcm;
657 int i;
658
659 if (rt) {
660 rt->panic = true;
661
662 if (rt->playback.instance)
663 snd_pcm_stop_xrun(rt->playback.instance);
664
665 if (rt->capture.instance)
666 snd_pcm_stop_xrun(rt->capture.instance);
667
668 for (i = 0; i < PCM_N_URBS; i++) {
669 usb_poison_urb(&rt->in_urbs[i].instance);
670 usb_poison_urb(&rt->out_urbs[i].instance);
671 }
672
673 }
674 }
675
676 void usb6fire_pcm_destroy(struct sfire_chip *chip)
677 {
678 struct pcm_runtime *rt = chip->pcm;
679
680 usb6fire_pcm_buffers_destroy(rt);
681 kfree(rt);
682 chip->pcm = NULL;
683 }
684
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.