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
usb6fire_pcm_set_rate(struct pcm_runtime * rt)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
usb6fire_pcm_get_substream(struct snd_pcm_substream * alsa_sub)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 */
usb6fire_pcm_stream_stop(struct pcm_runtime * rt)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 */
usb6fire_pcm_stream_start(struct pcm_runtime * rt)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 */
usb6fire_pcm_capture(struct pcm_substream * sub,struct pcm_urb * urb)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 */
usb6fire_pcm_playback(struct pcm_substream * sub,struct pcm_urb * urb)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
usb6fire_pcm_in_urb_handler(struct urb * usb_urb)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 bool period_elapsed;
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 period_elapsed = false;
317 scoped_guard(spinlock_irqsave, &sub->lock) {
318 if (sub->active) {
319 usb6fire_pcm_capture(sub, in_urb);
320 if (sub->period_off >= sub->instance->runtime->period_size) {
321 sub->period_off %= sub->instance->runtime->period_size;
322 period_elapsed = true;
323 }
324 }
325 }
326 if (period_elapsed)
327 snd_pcm_period_elapsed(sub->instance);
328
329 /* setup out urb structure */
330 for (i = 0; i < PCM_N_PACKETS_PER_URB; i++) {
331 out_urb->packets[i].offset = total_length;
332 out_urb->packets[i].length = (in_urb->packets[i].actual_length
333 - 4) / (rt->in_n_analog << 2)
334 * (rt->out_n_analog << 2) + 4;
335 out_urb->packets[i].status = 0;
336 total_length += out_urb->packets[i].length;
337 }
338 memset(out_urb->buffer, 0, total_length);
339
340 /* now send our playback data (if a free out urb was found) */
341 sub = &rt->playback;
342 period_elapsed = false;
343 scoped_guard(spinlock_irqsave, &sub->lock) {
344 if (sub->active) {
345 usb6fire_pcm_playback(sub, out_urb);
346 if (sub->period_off >= sub->instance->runtime->period_size) {
347 sub->period_off %= sub->instance->runtime->period_size;
348 period_elapsed = true;
349 }
350 }
351 }
352 if (period_elapsed)
353 snd_pcm_period_elapsed(sub->instance);
354
355 /* setup the 4th byte of each sample (0x40 for analog channels) */
356 dest = out_urb->buffer;
357 for (i = 0; i < PCM_N_PACKETS_PER_URB; i++)
358 if (out_urb->packets[i].length >= 4) {
359 frame_count = (out_urb->packets[i].length - 4)
360 / (rt->out_n_analog << 2);
361 *(dest++) = 0xaa;
362 *(dest++) = 0xaa;
363 *(dest++) = frame_count;
364 *(dest++) = 0x00;
365 for (frame = 0; frame < frame_count; frame++)
366 for (channel = 0;
367 channel < rt->out_n_analog;
368 channel++) {
369 dest += 3; /* skip sample data */
370 *(dest++) = 0x40;
371 }
372 }
373 usb_submit_urb(&out_urb->instance, GFP_ATOMIC);
374 usb_submit_urb(&in_urb->instance, GFP_ATOMIC);
375 }
376
usb6fire_pcm_out_urb_handler(struct urb * usb_urb)377 static void usb6fire_pcm_out_urb_handler(struct urb *usb_urb)
378 {
379 struct pcm_urb *urb = usb_urb->context;
380 struct pcm_runtime *rt = urb->chip->pcm;
381
382 if (rt->stream_state == STREAM_STARTING) {
383 rt->stream_wait_cond = true;
384 wake_up(&rt->stream_wait_queue);
385 }
386 }
387
usb6fire_pcm_open(struct snd_pcm_substream * alsa_sub)388 static int usb6fire_pcm_open(struct snd_pcm_substream *alsa_sub)
389 {
390 struct pcm_runtime *rt = snd_pcm_substream_chip(alsa_sub);
391 struct pcm_substream *sub = NULL;
392 struct snd_pcm_runtime *alsa_rt = alsa_sub->runtime;
393
394 if (rt->panic)
395 return -EPIPE;
396
397 guard(mutex)(&rt->stream_mutex);
398 alsa_rt->hw = pcm_hw;
399
400 if (alsa_sub->stream == SNDRV_PCM_STREAM_PLAYBACK) {
401 if (rt->rate < ARRAY_SIZE(rates))
402 alsa_rt->hw.rates = rates_alsaid[rt->rate];
403 alsa_rt->hw.channels_max = OUT_N_CHANNELS;
404 sub = &rt->playback;
405 } else if (alsa_sub->stream == SNDRV_PCM_STREAM_CAPTURE) {
406 if (rt->rate < ARRAY_SIZE(rates))
407 alsa_rt->hw.rates = rates_alsaid[rt->rate];
408 alsa_rt->hw.channels_max = IN_N_CHANNELS;
409 sub = &rt->capture;
410 }
411
412 if (!sub) {
413 dev_err(&rt->chip->dev->dev, "invalid stream type.\n");
414 return -EINVAL;
415 }
416
417 sub->instance = alsa_sub;
418 sub->active = false;
419 return 0;
420 }
421
usb6fire_pcm_close(struct snd_pcm_substream * alsa_sub)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
427 if (rt->panic)
428 return 0;
429
430 guard(mutex)(&rt->stream_mutex);
431 if (sub) {
432 /* deactivate substream */
433 scoped_guard(spinlock_irqsave, &sub->lock) {
434 sub->instance = NULL;
435 sub->active = false;
436 }
437
438 /* all substreams closed? if so, stop streaming */
439 if (!rt->playback.instance && !rt->capture.instance) {
440 usb6fire_pcm_stream_stop(rt);
441 rt->rate = ARRAY_SIZE(rates);
442 }
443 }
444 return 0;
445 }
446
usb6fire_pcm_prepare(struct snd_pcm_substream * alsa_sub)447 static int usb6fire_pcm_prepare(struct snd_pcm_substream *alsa_sub)
448 {
449 struct pcm_runtime *rt = snd_pcm_substream_chip(alsa_sub);
450 struct pcm_substream *sub = usb6fire_pcm_get_substream(alsa_sub);
451 struct snd_pcm_runtime *alsa_rt = alsa_sub->runtime;
452 int ret;
453
454 if (rt->panic)
455 return -EPIPE;
456 if (!sub)
457 return -ENODEV;
458
459 guard(mutex)(&rt->stream_mutex);
460 sub->dma_off = 0;
461 sub->period_off = 0;
462
463 if (rt->stream_state == STREAM_DISABLED) {
464 for (rt->rate = 0; rt->rate < ARRAY_SIZE(rates); rt->rate++)
465 if (alsa_rt->rate == rates[rt->rate])
466 break;
467 if (rt->rate == ARRAY_SIZE(rates)) {
468 dev_err(&rt->chip->dev->dev,
469 "invalid rate %d in prepare.\n",
470 alsa_rt->rate);
471 return -EINVAL;
472 }
473
474 ret = usb6fire_pcm_set_rate(rt);
475 if (ret)
476 return ret;
477 ret = usb6fire_pcm_stream_start(rt);
478 if (ret) {
479 dev_err(&rt->chip->dev->dev,
480 "could not start pcm stream.\n");
481 return ret;
482 }
483 }
484 return 0;
485 }
486
usb6fire_pcm_trigger(struct snd_pcm_substream * alsa_sub,int cmd)487 static int usb6fire_pcm_trigger(struct snd_pcm_substream *alsa_sub, int cmd)
488 {
489 struct pcm_substream *sub = usb6fire_pcm_get_substream(alsa_sub);
490 struct pcm_runtime *rt = snd_pcm_substream_chip(alsa_sub);
491
492 if (rt->panic)
493 return -EPIPE;
494 if (!sub)
495 return -ENODEV;
496
497 guard(spinlock_irqsave)(&sub->lock);
498 switch (cmd) {
499 case SNDRV_PCM_TRIGGER_START:
500 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
501 sub->active = true;
502 return 0;
503
504 case SNDRV_PCM_TRIGGER_STOP:
505 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
506 sub->active = false;
507 return 0;
508
509 default:
510 return -EINVAL;
511 }
512 }
513
usb6fire_pcm_pointer(struct snd_pcm_substream * alsa_sub)514 static snd_pcm_uframes_t usb6fire_pcm_pointer(
515 struct snd_pcm_substream *alsa_sub)
516 {
517 struct pcm_substream *sub = usb6fire_pcm_get_substream(alsa_sub);
518 struct pcm_runtime *rt = snd_pcm_substream_chip(alsa_sub);
519 snd_pcm_uframes_t ret;
520
521 if (rt->panic || !sub)
522 return SNDRV_PCM_POS_XRUN;
523
524 guard(spinlock_irqsave)(&sub->lock);
525 ret = sub->dma_off;
526 return ret;
527 }
528
529 static const struct snd_pcm_ops pcm_ops = {
530 .open = usb6fire_pcm_open,
531 .close = usb6fire_pcm_close,
532 .prepare = usb6fire_pcm_prepare,
533 .trigger = usb6fire_pcm_trigger,
534 .pointer = usb6fire_pcm_pointer,
535 };
536
usb6fire_pcm_init_urb(struct pcm_urb * urb,struct sfire_chip * chip,bool in,int ep,void (* handler)(struct urb *))537 static void usb6fire_pcm_init_urb(struct pcm_urb *urb,
538 struct sfire_chip *chip, bool in, int ep,
539 void (*handler)(struct urb *))
540 {
541 urb->chip = chip;
542 usb_init_urb(&urb->instance);
543 urb->instance.transfer_buffer = urb->buffer;
544 urb->instance.transfer_buffer_length =
545 PCM_N_PACKETS_PER_URB * PCM_MAX_PACKET_SIZE;
546 urb->instance.dev = chip->dev;
547 urb->instance.pipe = in ? usb_rcvisocpipe(chip->dev, ep)
548 : usb_sndisocpipe(chip->dev, ep);
549 urb->instance.interval = 1;
550 urb->instance.complete = handler;
551 urb->instance.context = urb;
552 urb->instance.number_of_packets = PCM_N_PACKETS_PER_URB;
553 }
554
usb6fire_pcm_buffers_init(struct pcm_runtime * rt)555 static int usb6fire_pcm_buffers_init(struct pcm_runtime *rt)
556 {
557 int i;
558
559 for (i = 0; i < PCM_N_URBS; i++) {
560 rt->out_urbs[i].buffer = kcalloc(PCM_MAX_PACKET_SIZE,
561 PCM_N_PACKETS_PER_URB,
562 GFP_KERNEL);
563 if (!rt->out_urbs[i].buffer)
564 return -ENOMEM;
565 rt->in_urbs[i].buffer = kcalloc(PCM_MAX_PACKET_SIZE,
566 PCM_N_PACKETS_PER_URB,
567 GFP_KERNEL);
568 if (!rt->in_urbs[i].buffer)
569 return -ENOMEM;
570 }
571 return 0;
572 }
573
usb6fire_pcm_buffers_destroy(struct pcm_runtime * rt)574 static void usb6fire_pcm_buffers_destroy(struct pcm_runtime *rt)
575 {
576 int i;
577
578 for (i = 0; i < PCM_N_URBS; i++) {
579 kfree(rt->out_urbs[i].buffer);
580 kfree(rt->in_urbs[i].buffer);
581 }
582 }
583
usb6fire_pcm_init(struct sfire_chip * chip)584 int usb6fire_pcm_init(struct sfire_chip *chip)
585 {
586 int i;
587 int ret;
588 struct snd_pcm *pcm;
589 struct pcm_runtime *rt =
590 kzalloc_obj(struct pcm_runtime);
591
592 if (!rt)
593 return -ENOMEM;
594
595 ret = usb6fire_pcm_buffers_init(rt);
596 if (ret) {
597 usb6fire_pcm_buffers_destroy(rt);
598 kfree(rt);
599 return ret;
600 }
601
602 rt->chip = chip;
603 rt->stream_state = STREAM_DISABLED;
604 rt->rate = ARRAY_SIZE(rates);
605 init_waitqueue_head(&rt->stream_wait_queue);
606 mutex_init(&rt->stream_mutex);
607
608 spin_lock_init(&rt->playback.lock);
609 spin_lock_init(&rt->capture.lock);
610
611 for (i = 0; i < PCM_N_URBS; i++) {
612 usb6fire_pcm_init_urb(&rt->in_urbs[i], chip, true, IN_EP,
613 usb6fire_pcm_in_urb_handler);
614 usb6fire_pcm_init_urb(&rt->out_urbs[i], chip, false, OUT_EP,
615 usb6fire_pcm_out_urb_handler);
616
617 rt->in_urbs[i].peer = &rt->out_urbs[i];
618 rt->out_urbs[i].peer = &rt->in_urbs[i];
619 }
620
621 ret = snd_pcm_new(chip->card, "DMX6FireUSB", 0, 1, 1, &pcm);
622 if (ret < 0) {
623 usb6fire_pcm_buffers_destroy(rt);
624 kfree(rt);
625 dev_err(&chip->dev->dev, "cannot create pcm instance.\n");
626 return ret;
627 }
628
629 pcm->private_data = rt;
630 strscpy(pcm->name, "DMX 6Fire USB");
631 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &pcm_ops);
632 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &pcm_ops);
633 snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_VMALLOC, NULL, 0, 0);
634
635 rt->instance = pcm;
636
637 chip->pcm = rt;
638 return 0;
639 }
640
usb6fire_pcm_abort(struct sfire_chip * chip)641 void usb6fire_pcm_abort(struct sfire_chip *chip)
642 {
643 struct pcm_runtime *rt = chip->pcm;
644 int i;
645
646 if (rt) {
647 rt->panic = true;
648
649 if (rt->playback.instance)
650 snd_pcm_stop_xrun(rt->playback.instance);
651
652 if (rt->capture.instance)
653 snd_pcm_stop_xrun(rt->capture.instance);
654
655 for (i = 0; i < PCM_N_URBS; i++) {
656 usb_poison_urb(&rt->in_urbs[i].instance);
657 usb_poison_urb(&rt->out_urbs[i].instance);
658 }
659
660 }
661 }
662
usb6fire_pcm_destroy(struct sfire_chip * chip)663 void usb6fire_pcm_destroy(struct sfire_chip *chip)
664 {
665 struct pcm_runtime *rt = chip->pcm;
666
667 usb6fire_pcm_buffers_destroy(rt);
668 kfree(rt);
669 chip->pcm = NULL;
670 }
671