1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * Linux driver for M2Tech hiFace compatible devices |
4 | * |
5 | * Copyright 2012-2013 (C) M2TECH S.r.l and Amarula Solutions B.V. |
6 | * |
7 | * Authors: Michael Trimarchi <michael@amarulasolutions.com> |
8 | * Antonio Ospite <ao2@amarulasolutions.com> |
9 | * |
10 | * The driver is based on the work done in TerraTec DMX 6Fire USB |
11 | */ |
12 | |
13 | #include <linux/slab.h> |
14 | #include <sound/pcm.h> |
15 | |
16 | #include "pcm.h" |
17 | #include "chip.h" |
18 | |
19 | #define OUT_EP 0x2 |
20 | #define PCM_N_URBS 8 |
21 | #define PCM_PACKET_SIZE 4096 |
22 | #define PCM_BUFFER_SIZE (2 * PCM_N_URBS * PCM_PACKET_SIZE) |
23 | |
24 | struct pcm_urb { |
25 | struct hiface_chip *chip; |
26 | |
27 | struct urb instance; |
28 | struct usb_anchor submitted; |
29 | u8 *buffer; |
30 | }; |
31 | |
32 | struct pcm_substream { |
33 | spinlock_t lock; |
34 | struct snd_pcm_substream *instance; |
35 | |
36 | bool active; |
37 | snd_pcm_uframes_t dma_off; /* current position in alsa dma_area */ |
38 | snd_pcm_uframes_t period_off; /* current position in current period */ |
39 | }; |
40 | |
41 | enum { /* pcm streaming states */ |
42 | STREAM_DISABLED, /* no pcm streaming */ |
43 | STREAM_STARTING, /* pcm streaming requested, waiting to become ready */ |
44 | STREAM_RUNNING, /* pcm streaming running */ |
45 | STREAM_STOPPING |
46 | }; |
47 | |
48 | struct pcm_runtime { |
49 | struct hiface_chip *chip; |
50 | struct snd_pcm *instance; |
51 | |
52 | struct pcm_substream playback; |
53 | bool panic; /* if set driver won't do anymore pcm on device */ |
54 | |
55 | struct pcm_urb out_urbs[PCM_N_URBS]; |
56 | |
57 | struct mutex stream_mutex; |
58 | u8 stream_state; /* one of STREAM_XXX */ |
59 | u8 ; |
60 | wait_queue_head_t stream_wait_queue; |
61 | bool stream_wait_cond; |
62 | }; |
63 | |
64 | static const unsigned int rates[] = { 44100, 48000, 88200, 96000, 176400, 192000, |
65 | 352800, 384000 }; |
66 | static const struct snd_pcm_hw_constraint_list = { |
67 | .count = ARRAY_SIZE(rates), |
68 | .list = rates, |
69 | .mask = 0, |
70 | }; |
71 | |
72 | static const struct snd_pcm_hardware pcm_hw = { |
73 | .info = SNDRV_PCM_INFO_MMAP | |
74 | SNDRV_PCM_INFO_INTERLEAVED | |
75 | SNDRV_PCM_INFO_BLOCK_TRANSFER | |
76 | SNDRV_PCM_INFO_PAUSE | |
77 | SNDRV_PCM_INFO_MMAP_VALID | |
78 | SNDRV_PCM_INFO_BATCH, |
79 | |
80 | .formats = SNDRV_PCM_FMTBIT_S32_LE, |
81 | |
82 | .rates = SNDRV_PCM_RATE_44100 | |
83 | SNDRV_PCM_RATE_48000 | |
84 | SNDRV_PCM_RATE_88200 | |
85 | SNDRV_PCM_RATE_96000 | |
86 | SNDRV_PCM_RATE_176400 | |
87 | SNDRV_PCM_RATE_192000, |
88 | |
89 | .rate_min = 44100, |
90 | .rate_max = 192000, /* changes in hiface_pcm_open to support extra rates */ |
91 | .channels_min = 2, |
92 | .channels_max = 2, |
93 | .buffer_bytes_max = PCM_BUFFER_SIZE, |
94 | .period_bytes_min = PCM_PACKET_SIZE, |
95 | .period_bytes_max = PCM_BUFFER_SIZE, |
96 | .periods_min = 2, |
97 | .periods_max = 1024 |
98 | }; |
99 | |
100 | /* message values used to change the sample rate */ |
101 | #define HIFACE_SET_RATE_REQUEST 0xb0 |
102 | |
103 | #define HIFACE_RATE_44100 0x43 |
104 | #define HIFACE_RATE_48000 0x4b |
105 | #define HIFACE_RATE_88200 0x42 |
106 | #define HIFACE_RATE_96000 0x4a |
107 | #define HIFACE_RATE_176400 0x40 |
108 | #define HIFACE_RATE_192000 0x48 |
109 | #define HIFACE_RATE_352800 0x58 |
110 | #define HIFACE_RATE_384000 0x68 |
111 | |
112 | static int hiface_pcm_set_rate(struct pcm_runtime *rt, unsigned int rate) |
113 | { |
114 | struct usb_device *device = rt->chip->dev; |
115 | u16 rate_value; |
116 | int ret; |
117 | |
118 | /* We are already sure that the rate is supported here thanks to |
119 | * ALSA constraints |
120 | */ |
121 | switch (rate) { |
122 | case 44100: |
123 | rate_value = HIFACE_RATE_44100; |
124 | break; |
125 | case 48000: |
126 | rate_value = HIFACE_RATE_48000; |
127 | break; |
128 | case 88200: |
129 | rate_value = HIFACE_RATE_88200; |
130 | break; |
131 | case 96000: |
132 | rate_value = HIFACE_RATE_96000; |
133 | break; |
134 | case 176400: |
135 | rate_value = HIFACE_RATE_176400; |
136 | break; |
137 | case 192000: |
138 | rate_value = HIFACE_RATE_192000; |
139 | break; |
140 | case 352800: |
141 | rate_value = HIFACE_RATE_352800; |
142 | break; |
143 | case 384000: |
144 | rate_value = HIFACE_RATE_384000; |
145 | break; |
146 | default: |
147 | dev_err(&device->dev, "Unsupported rate %d\n" , rate); |
148 | return -EINVAL; |
149 | } |
150 | |
151 | /* |
152 | * USBIO: Vendor 0xb0(wValue=0x0043, wIndex=0x0000) |
153 | * 43 b0 43 00 00 00 00 00 |
154 | * USBIO: Vendor 0xb0(wValue=0x004b, wIndex=0x0000) |
155 | * 43 b0 4b 00 00 00 00 00 |
156 | * This control message doesn't have any ack from the |
157 | * other side |
158 | */ |
159 | ret = usb_control_msg_send(dev: device, endpoint: 0, |
160 | HIFACE_SET_RATE_REQUEST, |
161 | USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER, |
162 | value: rate_value, index: 0, NULL, size: 0, timeout: 100, GFP_KERNEL); |
163 | if (ret) |
164 | dev_err(&device->dev, "Error setting samplerate %d.\n" , rate); |
165 | |
166 | return ret; |
167 | } |
168 | |
169 | static struct pcm_substream *hiface_pcm_get_substream(struct snd_pcm_substream |
170 | *alsa_sub) |
171 | { |
172 | struct pcm_runtime *rt = snd_pcm_substream_chip(alsa_sub); |
173 | struct device *device = &rt->chip->dev->dev; |
174 | |
175 | if (alsa_sub->stream == SNDRV_PCM_STREAM_PLAYBACK) |
176 | return &rt->playback; |
177 | |
178 | dev_err(device, "Error getting pcm substream slot.\n" ); |
179 | return NULL; |
180 | } |
181 | |
182 | /* call with stream_mutex locked */ |
183 | static void hiface_pcm_stream_stop(struct pcm_runtime *rt) |
184 | { |
185 | int i, time; |
186 | |
187 | if (rt->stream_state != STREAM_DISABLED) { |
188 | rt->stream_state = STREAM_STOPPING; |
189 | |
190 | for (i = 0; i < PCM_N_URBS; i++) { |
191 | time = usb_wait_anchor_empty_timeout( |
192 | anchor: &rt->out_urbs[i].submitted, timeout: 100); |
193 | if (!time) |
194 | usb_kill_anchored_urbs( |
195 | anchor: &rt->out_urbs[i].submitted); |
196 | usb_kill_urb(urb: &rt->out_urbs[i].instance); |
197 | } |
198 | |
199 | rt->stream_state = STREAM_DISABLED; |
200 | } |
201 | } |
202 | |
203 | /* call with stream_mutex locked */ |
204 | static int hiface_pcm_stream_start(struct pcm_runtime *rt) |
205 | { |
206 | int ret = 0; |
207 | int i; |
208 | |
209 | if (rt->stream_state == STREAM_DISABLED) { |
210 | |
211 | /* reset panic state when starting a new stream */ |
212 | rt->panic = false; |
213 | |
214 | /* submit our out urbs zero init */ |
215 | rt->stream_state = STREAM_STARTING; |
216 | for (i = 0; i < PCM_N_URBS; i++) { |
217 | memset(rt->out_urbs[i].buffer, 0, PCM_PACKET_SIZE); |
218 | usb_anchor_urb(urb: &rt->out_urbs[i].instance, |
219 | anchor: &rt->out_urbs[i].submitted); |
220 | ret = usb_submit_urb(urb: &rt->out_urbs[i].instance, |
221 | GFP_ATOMIC); |
222 | if (ret) { |
223 | hiface_pcm_stream_stop(rt); |
224 | return ret; |
225 | } |
226 | } |
227 | |
228 | /* wait for first out urb to return (sent in urb handler) */ |
229 | wait_event_timeout(rt->stream_wait_queue, rt->stream_wait_cond, |
230 | HZ); |
231 | if (rt->stream_wait_cond) { |
232 | struct device *device = &rt->chip->dev->dev; |
233 | dev_dbg(device, "%s: Stream is running wakeup event\n" , |
234 | __func__); |
235 | rt->stream_state = STREAM_RUNNING; |
236 | } else { |
237 | hiface_pcm_stream_stop(rt); |
238 | return -EIO; |
239 | } |
240 | } |
241 | return ret; |
242 | } |
243 | |
244 | /* The hardware wants word-swapped 32-bit values */ |
245 | static void memcpy_swahw32(u8 *dest, u8 *src, unsigned int n) |
246 | { |
247 | unsigned int i; |
248 | |
249 | for (i = 0; i < n / 4; i++) |
250 | ((u32 *)dest)[i] = swahw32(((u32 *)src)[i]); |
251 | } |
252 | |
253 | /* call with substream locked */ |
254 | /* returns true if a period elapsed */ |
255 | static bool hiface_pcm_playback(struct pcm_substream *sub, struct pcm_urb *urb) |
256 | { |
257 | struct snd_pcm_runtime *alsa_rt = sub->instance->runtime; |
258 | struct device *device = &urb->chip->dev->dev; |
259 | u8 *source; |
260 | unsigned int pcm_buffer_size; |
261 | |
262 | WARN_ON(alsa_rt->format != SNDRV_PCM_FORMAT_S32_LE); |
263 | |
264 | pcm_buffer_size = snd_pcm_lib_buffer_bytes(substream: sub->instance); |
265 | |
266 | if (sub->dma_off + PCM_PACKET_SIZE <= pcm_buffer_size) { |
267 | dev_dbg(device, "%s: (1) buffer_size %#x dma_offset %#x\n" , __func__, |
268 | (unsigned int) pcm_buffer_size, |
269 | (unsigned int) sub->dma_off); |
270 | |
271 | source = alsa_rt->dma_area + sub->dma_off; |
272 | memcpy_swahw32(dest: urb->buffer, src: source, PCM_PACKET_SIZE); |
273 | } else { |
274 | /* wrap around at end of ring buffer */ |
275 | unsigned int len; |
276 | |
277 | dev_dbg(device, "%s: (2) buffer_size %#x dma_offset %#x\n" , __func__, |
278 | (unsigned int) pcm_buffer_size, |
279 | (unsigned int) sub->dma_off); |
280 | |
281 | len = pcm_buffer_size - sub->dma_off; |
282 | |
283 | source = alsa_rt->dma_area + sub->dma_off; |
284 | memcpy_swahw32(dest: urb->buffer, src: source, n: len); |
285 | |
286 | source = alsa_rt->dma_area; |
287 | memcpy_swahw32(dest: urb->buffer + len, src: source, |
288 | PCM_PACKET_SIZE - len); |
289 | } |
290 | sub->dma_off += PCM_PACKET_SIZE; |
291 | if (sub->dma_off >= pcm_buffer_size) |
292 | sub->dma_off -= pcm_buffer_size; |
293 | |
294 | sub->period_off += PCM_PACKET_SIZE; |
295 | if (sub->period_off >= alsa_rt->period_size) { |
296 | sub->period_off %= alsa_rt->period_size; |
297 | return true; |
298 | } |
299 | return false; |
300 | } |
301 | |
302 | static void hiface_pcm_out_urb_handler(struct urb *usb_urb) |
303 | { |
304 | struct pcm_urb *out_urb = usb_urb->context; |
305 | struct pcm_runtime *rt = out_urb->chip->pcm; |
306 | struct pcm_substream *sub; |
307 | bool do_period_elapsed = false; |
308 | unsigned long flags; |
309 | int ret; |
310 | |
311 | if (rt->panic || rt->stream_state == STREAM_STOPPING) |
312 | return; |
313 | |
314 | if (unlikely(usb_urb->status == -ENOENT || /* unlinked */ |
315 | usb_urb->status == -ENODEV || /* device removed */ |
316 | usb_urb->status == -ECONNRESET || /* unlinked */ |
317 | usb_urb->status == -ESHUTDOWN)) { /* device disabled */ |
318 | goto out_fail; |
319 | } |
320 | |
321 | if (rt->stream_state == STREAM_STARTING) { |
322 | rt->stream_wait_cond = true; |
323 | wake_up(&rt->stream_wait_queue); |
324 | } |
325 | |
326 | /* now send our playback data (if a free out urb was found) */ |
327 | sub = &rt->playback; |
328 | spin_lock_irqsave(&sub->lock, flags); |
329 | if (sub->active) |
330 | do_period_elapsed = hiface_pcm_playback(sub, urb: out_urb); |
331 | else |
332 | memset(out_urb->buffer, 0, PCM_PACKET_SIZE); |
333 | |
334 | spin_unlock_irqrestore(lock: &sub->lock, flags); |
335 | |
336 | if (do_period_elapsed) |
337 | snd_pcm_period_elapsed(substream: sub->instance); |
338 | |
339 | ret = usb_submit_urb(urb: &out_urb->instance, GFP_ATOMIC); |
340 | if (ret < 0) |
341 | goto out_fail; |
342 | |
343 | return; |
344 | |
345 | out_fail: |
346 | rt->panic = true; |
347 | } |
348 | |
349 | static int hiface_pcm_open(struct snd_pcm_substream *alsa_sub) |
350 | { |
351 | struct pcm_runtime *rt = snd_pcm_substream_chip(alsa_sub); |
352 | struct pcm_substream *sub = NULL; |
353 | struct snd_pcm_runtime *alsa_rt = alsa_sub->runtime; |
354 | int ret; |
355 | |
356 | if (rt->panic) |
357 | return -EPIPE; |
358 | |
359 | mutex_lock(&rt->stream_mutex); |
360 | alsa_rt->hw = pcm_hw; |
361 | |
362 | if (alsa_sub->stream == SNDRV_PCM_STREAM_PLAYBACK) |
363 | sub = &rt->playback; |
364 | |
365 | if (!sub) { |
366 | struct device *device = &rt->chip->dev->dev; |
367 | mutex_unlock(lock: &rt->stream_mutex); |
368 | dev_err(device, "Invalid stream type\n" ); |
369 | return -EINVAL; |
370 | } |
371 | |
372 | if (rt->extra_freq) { |
373 | alsa_rt->hw.rates |= SNDRV_PCM_RATE_KNOT; |
374 | alsa_rt->hw.rate_max = 384000; |
375 | |
376 | /* explicit constraints needed as we added SNDRV_PCM_RATE_KNOT */ |
377 | ret = snd_pcm_hw_constraint_list(runtime: alsa_sub->runtime, cond: 0, |
378 | SNDRV_PCM_HW_PARAM_RATE, |
379 | l: &constraints_extra_rates); |
380 | if (ret < 0) { |
381 | mutex_unlock(lock: &rt->stream_mutex); |
382 | return ret; |
383 | } |
384 | } |
385 | |
386 | sub->instance = alsa_sub; |
387 | sub->active = false; |
388 | mutex_unlock(lock: &rt->stream_mutex); |
389 | return 0; |
390 | } |
391 | |
392 | static int hiface_pcm_close(struct snd_pcm_substream *alsa_sub) |
393 | { |
394 | struct pcm_runtime *rt = snd_pcm_substream_chip(alsa_sub); |
395 | struct pcm_substream *sub = hiface_pcm_get_substream(alsa_sub); |
396 | unsigned long flags; |
397 | |
398 | if (rt->panic) |
399 | return 0; |
400 | |
401 | mutex_lock(&rt->stream_mutex); |
402 | if (sub) { |
403 | hiface_pcm_stream_stop(rt); |
404 | |
405 | /* deactivate substream */ |
406 | spin_lock_irqsave(&sub->lock, flags); |
407 | sub->instance = NULL; |
408 | sub->active = false; |
409 | spin_unlock_irqrestore(lock: &sub->lock, flags); |
410 | |
411 | } |
412 | mutex_unlock(lock: &rt->stream_mutex); |
413 | return 0; |
414 | } |
415 | |
416 | static int hiface_pcm_prepare(struct snd_pcm_substream *alsa_sub) |
417 | { |
418 | struct pcm_runtime *rt = snd_pcm_substream_chip(alsa_sub); |
419 | struct pcm_substream *sub = hiface_pcm_get_substream(alsa_sub); |
420 | struct snd_pcm_runtime *alsa_rt = alsa_sub->runtime; |
421 | int ret; |
422 | |
423 | if (rt->panic) |
424 | return -EPIPE; |
425 | if (!sub) |
426 | return -ENODEV; |
427 | |
428 | mutex_lock(&rt->stream_mutex); |
429 | |
430 | hiface_pcm_stream_stop(rt); |
431 | |
432 | sub->dma_off = 0; |
433 | sub->period_off = 0; |
434 | |
435 | if (rt->stream_state == STREAM_DISABLED) { |
436 | |
437 | ret = hiface_pcm_set_rate(rt, rate: alsa_rt->rate); |
438 | if (ret) { |
439 | mutex_unlock(lock: &rt->stream_mutex); |
440 | return ret; |
441 | } |
442 | ret = hiface_pcm_stream_start(rt); |
443 | if (ret) { |
444 | mutex_unlock(lock: &rt->stream_mutex); |
445 | return ret; |
446 | } |
447 | } |
448 | mutex_unlock(lock: &rt->stream_mutex); |
449 | return 0; |
450 | } |
451 | |
452 | static int hiface_pcm_trigger(struct snd_pcm_substream *alsa_sub, int cmd) |
453 | { |
454 | struct pcm_substream *sub = hiface_pcm_get_substream(alsa_sub); |
455 | struct pcm_runtime *rt = snd_pcm_substream_chip(alsa_sub); |
456 | |
457 | if (rt->panic) |
458 | return -EPIPE; |
459 | if (!sub) |
460 | return -ENODEV; |
461 | |
462 | switch (cmd) { |
463 | case SNDRV_PCM_TRIGGER_START: |
464 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
465 | spin_lock_irq(lock: &sub->lock); |
466 | sub->active = true; |
467 | spin_unlock_irq(lock: &sub->lock); |
468 | return 0; |
469 | |
470 | case SNDRV_PCM_TRIGGER_STOP: |
471 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: |
472 | spin_lock_irq(lock: &sub->lock); |
473 | sub->active = false; |
474 | spin_unlock_irq(lock: &sub->lock); |
475 | return 0; |
476 | |
477 | default: |
478 | return -EINVAL; |
479 | } |
480 | } |
481 | |
482 | static snd_pcm_uframes_t hiface_pcm_pointer(struct snd_pcm_substream *alsa_sub) |
483 | { |
484 | struct pcm_substream *sub = hiface_pcm_get_substream(alsa_sub); |
485 | struct pcm_runtime *rt = snd_pcm_substream_chip(alsa_sub); |
486 | unsigned long flags; |
487 | snd_pcm_uframes_t dma_offset; |
488 | |
489 | if (rt->panic || !sub) |
490 | return SNDRV_PCM_POS_XRUN; |
491 | |
492 | spin_lock_irqsave(&sub->lock, flags); |
493 | dma_offset = sub->dma_off; |
494 | spin_unlock_irqrestore(lock: &sub->lock, flags); |
495 | return bytes_to_frames(runtime: alsa_sub->runtime, size: dma_offset); |
496 | } |
497 | |
498 | static const struct snd_pcm_ops pcm_ops = { |
499 | .open = hiface_pcm_open, |
500 | .close = hiface_pcm_close, |
501 | .prepare = hiface_pcm_prepare, |
502 | .trigger = hiface_pcm_trigger, |
503 | .pointer = hiface_pcm_pointer, |
504 | }; |
505 | |
506 | static int hiface_pcm_init_urb(struct pcm_urb *urb, |
507 | struct hiface_chip *chip, |
508 | unsigned int ep, |
509 | void (*handler)(struct urb *)) |
510 | { |
511 | urb->chip = chip; |
512 | usb_init_urb(urb: &urb->instance); |
513 | |
514 | urb->buffer = kzalloc(PCM_PACKET_SIZE, GFP_KERNEL); |
515 | if (!urb->buffer) |
516 | return -ENOMEM; |
517 | |
518 | usb_fill_bulk_urb(urb: &urb->instance, dev: chip->dev, |
519 | usb_sndbulkpipe(chip->dev, ep), transfer_buffer: (void *)urb->buffer, |
520 | PCM_PACKET_SIZE, complete_fn: handler, context: urb); |
521 | if (usb_urb_ep_type_check(urb: &urb->instance)) |
522 | return -EINVAL; |
523 | init_usb_anchor(anchor: &urb->submitted); |
524 | |
525 | return 0; |
526 | } |
527 | |
528 | void hiface_pcm_abort(struct hiface_chip *chip) |
529 | { |
530 | struct pcm_runtime *rt = chip->pcm; |
531 | |
532 | if (rt) { |
533 | rt->panic = true; |
534 | |
535 | mutex_lock(&rt->stream_mutex); |
536 | hiface_pcm_stream_stop(rt); |
537 | mutex_unlock(lock: &rt->stream_mutex); |
538 | } |
539 | } |
540 | |
541 | static void hiface_pcm_destroy(struct hiface_chip *chip) |
542 | { |
543 | struct pcm_runtime *rt = chip->pcm; |
544 | int i; |
545 | |
546 | for (i = 0; i < PCM_N_URBS; i++) |
547 | kfree(objp: rt->out_urbs[i].buffer); |
548 | |
549 | kfree(objp: chip->pcm); |
550 | chip->pcm = NULL; |
551 | } |
552 | |
553 | static void hiface_pcm_free(struct snd_pcm *pcm) |
554 | { |
555 | struct pcm_runtime *rt = pcm->private_data; |
556 | |
557 | if (rt) |
558 | hiface_pcm_destroy(chip: rt->chip); |
559 | } |
560 | |
561 | int hiface_pcm_init(struct hiface_chip *chip, u8 ) |
562 | { |
563 | int i; |
564 | int ret; |
565 | struct snd_pcm *pcm; |
566 | struct pcm_runtime *rt; |
567 | |
568 | rt = kzalloc(size: sizeof(*rt), GFP_KERNEL); |
569 | if (!rt) |
570 | return -ENOMEM; |
571 | |
572 | rt->chip = chip; |
573 | rt->stream_state = STREAM_DISABLED; |
574 | if (extra_freq) |
575 | rt->extra_freq = 1; |
576 | |
577 | init_waitqueue_head(&rt->stream_wait_queue); |
578 | mutex_init(&rt->stream_mutex); |
579 | spin_lock_init(&rt->playback.lock); |
580 | |
581 | for (i = 0; i < PCM_N_URBS; i++) { |
582 | ret = hiface_pcm_init_urb(urb: &rt->out_urbs[i], chip, OUT_EP, |
583 | handler: hiface_pcm_out_urb_handler); |
584 | if (ret < 0) |
585 | goto error; |
586 | } |
587 | |
588 | ret = snd_pcm_new(card: chip->card, id: "USB-SPDIF Audio" , device: 0, playback_count: 1, capture_count: 0, rpcm: &pcm); |
589 | if (ret < 0) { |
590 | dev_err(&chip->dev->dev, "Cannot create pcm instance\n" ); |
591 | goto error; |
592 | } |
593 | |
594 | pcm->private_data = rt; |
595 | pcm->private_free = hiface_pcm_free; |
596 | |
597 | strscpy(pcm->name, "USB-SPDIF Audio" , sizeof(pcm->name)); |
598 | snd_pcm_set_ops(pcm, direction: SNDRV_PCM_STREAM_PLAYBACK, ops: &pcm_ops); |
599 | snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_VMALLOC, |
600 | NULL, size: 0, max: 0); |
601 | |
602 | rt->instance = pcm; |
603 | |
604 | chip->pcm = rt; |
605 | return 0; |
606 | |
607 | error: |
608 | for (i = 0; i < PCM_N_URBS; i++) |
609 | kfree(objp: rt->out_urbs[i].buffer); |
610 | kfree(objp: rt); |
611 | return ret; |
612 | } |
613 | |