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523f1dce DM |
1 | /* |
2 | * Copyright (c) 2006,2007 Daniel Mack, Karsten Wiese | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License as published by | |
6 | * the Free Software Foundation; either version 2 of the License, or | |
7 | * (at your option) any later version. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
17 | */ | |
18 | ||
19 | #include <sound/driver.h> | |
20 | #include <linux/init.h> | |
21 | #include <linux/module.h> | |
22 | #include <linux/moduleparam.h> | |
23 | #include <linux/interrupt.h> | |
24 | #include <linux/usb.h> | |
25 | #include <linux/spinlock.h> | |
26 | #include <sound/core.h> | |
27 | #include <sound/initval.h> | |
28 | #include <sound/pcm.h> | |
29 | #include <sound/rawmidi.h> | |
30 | #ifdef CONFIG_SND_USB_CAIAQ_INPUT | |
31 | #include <linux/input.h> | |
32 | #endif | |
33 | ||
34 | #include "caiaq-device.h" | |
35 | #include "caiaq-audio.h" | |
36 | ||
37 | #define N_URBS 32 | |
38 | #define CLOCK_DRIFT_TOLERANCE 5 | |
39 | #define FRAMES_PER_URB 8 | |
40 | #define BYTES_PER_FRAME 512 | |
41 | #define CHANNELS_PER_STREAM 2 | |
42 | #define BYTES_PER_SAMPLE 3 | |
43 | #define BYTES_PER_SAMPLE_USB 4 | |
44 | #define MAX_BUFFER_SIZE (128*1024) | |
45 | ||
46 | #define ENDPOINT_CAPTURE 2 | |
47 | #define ENDPOINT_PLAYBACK 6 | |
48 | ||
49 | #define MAKE_CHECKBYTE(dev,stream,i) \ | |
50 | (stream << 1) | (~(i / (dev->n_streams * BYTES_PER_SAMPLE_USB)) & 1) | |
51 | ||
52 | static struct snd_pcm_hardware snd_usb_caiaq_pcm_hardware = { | |
53 | .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | | |
54 | SNDRV_PCM_INFO_BLOCK_TRANSFER), | |
55 | .formats = SNDRV_PCM_FMTBIT_S24_3BE, | |
56 | .rates = (SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 | | |
57 | SNDRV_PCM_RATE_96000), | |
58 | .rate_min = 44100, | |
59 | .rate_max = 0, /* will overwrite later */ | |
60 | .channels_min = CHANNELS_PER_STREAM, | |
61 | .channels_max = CHANNELS_PER_STREAM, | |
62 | .buffer_bytes_max = MAX_BUFFER_SIZE, | |
63 | .period_bytes_min = 4096, | |
64 | .period_bytes_max = MAX_BUFFER_SIZE, | |
65 | .periods_min = 1, | |
66 | .periods_max = 1024, | |
67 | }; | |
68 | ||
69 | static void | |
70 | activate_substream(struct snd_usb_caiaqdev *dev, | |
71 | struct snd_pcm_substream *sub) | |
72 | { | |
73 | if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
74 | dev->sub_playback[sub->number] = sub; | |
75 | else | |
76 | dev->sub_capture[sub->number] = sub; | |
77 | } | |
78 | ||
79 | static void | |
80 | deactivate_substream(struct snd_usb_caiaqdev *dev, | |
81 | struct snd_pcm_substream *sub) | |
82 | { | |
83 | if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
84 | dev->sub_playback[sub->number] = NULL; | |
85 | else | |
86 | dev->sub_capture[sub->number] = NULL; | |
87 | } | |
88 | ||
89 | static int | |
90 | all_substreams_zero(struct snd_pcm_substream **subs) | |
91 | { | |
92 | int i; | |
93 | for (i = 0; i < MAX_STREAMS; i++) | |
94 | if (subs[i] != NULL) | |
95 | return 0; | |
96 | return 1; | |
97 | } | |
98 | ||
99 | static int stream_start(struct snd_usb_caiaqdev *dev) | |
100 | { | |
101 | int i, ret; | |
102 | ||
103 | debug("stream_start(%p)\n", dev); | |
104 | spin_lock_irq(&dev->spinlock); | |
105 | if (dev->streaming) { | |
106 | spin_unlock_irq(&dev->spinlock); | |
107 | return -EINVAL; | |
108 | } | |
109 | ||
110 | dev->input_panic = 0; | |
111 | dev->output_panic = 0; | |
112 | dev->first_packet = 1; | |
113 | dev->streaming = 1; | |
114 | ||
115 | for (i = 0; i < N_URBS; i++) { | |
116 | ret = usb_submit_urb(dev->data_urbs_in[i], GFP_ATOMIC); | |
117 | if (ret) { | |
118 | log("unable to trigger initial read #%d! (ret = %d)\n", | |
119 | i, ret); | |
120 | dev->streaming = 0; | |
121 | spin_unlock_irq(&dev->spinlock); | |
122 | return -EPIPE; | |
123 | } | |
124 | } | |
125 | ||
126 | spin_unlock_irq(&dev->spinlock); | |
127 | return 0; | |
128 | } | |
129 | ||
130 | static void stream_stop(struct snd_usb_caiaqdev *dev) | |
131 | { | |
132 | int i; | |
133 | ||
134 | debug("stream_stop(%p)\n", dev); | |
135 | if (!dev->streaming) | |
136 | return; | |
137 | ||
138 | dev->streaming = 0; | |
139 | for (i = 0; i < N_URBS; i++) { | |
140 | usb_unlink_urb(dev->data_urbs_in[i]); | |
141 | usb_unlink_urb(dev->data_urbs_out[i]); | |
142 | } | |
143 | } | |
144 | ||
145 | static int snd_usb_caiaq_substream_open(struct snd_pcm_substream *substream) | |
146 | { | |
147 | struct snd_usb_caiaqdev *dev = snd_pcm_substream_chip(substream); | |
148 | debug("snd_usb_caiaq_substream_open(%p)\n", substream); | |
149 | substream->runtime->hw = dev->pcm_info; | |
150 | snd_pcm_limit_hw_rates(substream->runtime); | |
151 | return 0; | |
152 | } | |
153 | ||
154 | static int snd_usb_caiaq_substream_close(struct snd_pcm_substream *substream) | |
155 | { | |
156 | struct snd_usb_caiaqdev *dev = snd_pcm_substream_chip(substream); | |
157 | ||
158 | debug("snd_usb_caiaq_substream_close(%p)\n", substream); | |
159 | if (all_substreams_zero(dev->sub_playback) && | |
160 | all_substreams_zero(dev->sub_capture)) { | |
161 | /* when the last client has stopped streaming, | |
162 | * all sample rates are allowed again */ | |
163 | stream_stop(dev); | |
164 | dev->pcm_info.rates = dev->samplerates; | |
165 | } | |
166 | ||
167 | return 0; | |
168 | } | |
169 | ||
170 | static int snd_usb_caiaq_pcm_hw_params(struct snd_pcm_substream *sub, | |
171 | struct snd_pcm_hw_params *hw_params) | |
172 | { | |
173 | debug("snd_usb_caiaq_pcm_hw_params(%p)\n", sub); | |
174 | return snd_pcm_lib_malloc_pages(sub, params_buffer_bytes(hw_params)); | |
175 | } | |
176 | ||
177 | static int snd_usb_caiaq_pcm_hw_free(struct snd_pcm_substream *sub) | |
178 | { | |
179 | struct snd_usb_caiaqdev *dev = snd_pcm_substream_chip(sub); | |
180 | debug("snd_usb_caiaq_pcm_hw_free(%p)\n", sub); | |
181 | spin_lock_irq(&dev->spinlock); | |
182 | deactivate_substream(dev, sub); | |
183 | spin_unlock_irq(&dev->spinlock); | |
184 | return snd_pcm_lib_free_pages(sub); | |
185 | } | |
186 | ||
187 | /* this should probably go upstream */ | |
188 | #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12 | |
189 | #error "Change this table" | |
190 | #endif | |
191 | ||
192 | static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100, | |
193 | 48000, 64000, 88200, 96000, 176400, 192000 }; | |
194 | ||
195 | static int snd_usb_caiaq_pcm_prepare(struct snd_pcm_substream *substream) | |
196 | { | |
197 | int bytes_per_sample, bpp, ret, i; | |
198 | int index = substream->number; | |
199 | struct snd_usb_caiaqdev *dev = snd_pcm_substream_chip(substream); | |
200 | struct snd_pcm_runtime *runtime = substream->runtime; | |
201 | ||
202 | debug("snd_usb_caiaq_pcm_prepare(%p)\n", substream); | |
203 | ||
204 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
205 | dev->audio_out_buf_pos[index] = BYTES_PER_SAMPLE + 1; | |
206 | else | |
207 | dev->audio_in_buf_pos[index] = 0; | |
208 | ||
209 | if (dev->streaming) | |
210 | return 0; | |
211 | ||
212 | /* the first client that opens a stream defines the sample rate | |
213 | * setting for all subsequent calls, until the last client closed. */ | |
214 | for (i=0; i < ARRAY_SIZE(rates); i++) | |
215 | if (runtime->rate == rates[i]) | |
216 | dev->pcm_info.rates = 1 << i; | |
217 | ||
218 | snd_pcm_limit_hw_rates(runtime); | |
219 | ||
220 | bytes_per_sample = BYTES_PER_SAMPLE; | |
221 | if (dev->spec.data_alignment == 2) | |
222 | bytes_per_sample++; | |
223 | ||
224 | bpp = ((runtime->rate / 8000) + CLOCK_DRIFT_TOLERANCE) | |
225 | * bytes_per_sample * CHANNELS_PER_STREAM * dev->n_streams; | |
226 | ||
227 | ret = snd_usb_caiaq_set_audio_params(dev, runtime->rate, | |
228 | runtime->sample_bits, bpp); | |
229 | if (ret) | |
230 | return ret; | |
231 | ||
232 | ret = stream_start(dev); | |
233 | if (ret) | |
234 | return ret; | |
235 | ||
236 | dev->output_running = 0; | |
237 | wait_event_timeout(dev->prepare_wait_queue, dev->output_running, HZ); | |
238 | if (!dev->output_running) { | |
239 | stream_stop(dev); | |
240 | return -EPIPE; | |
241 | } | |
242 | ||
243 | return 0; | |
244 | } | |
245 | ||
246 | static int snd_usb_caiaq_pcm_trigger(struct snd_pcm_substream *sub, int cmd) | |
247 | { | |
248 | struct snd_usb_caiaqdev *dev = snd_pcm_substream_chip(sub); | |
249 | ||
250 | switch (cmd) { | |
251 | case SNDRV_PCM_TRIGGER_START: | |
252 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: | |
253 | spin_lock(&dev->spinlock); | |
254 | activate_substream(dev, sub); | |
255 | spin_unlock(&dev->spinlock); | |
256 | break; | |
257 | case SNDRV_PCM_TRIGGER_STOP: | |
258 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: | |
259 | spin_lock(&dev->spinlock); | |
260 | deactivate_substream(dev, sub); | |
261 | spin_unlock(&dev->spinlock); | |
262 | break; | |
263 | default: | |
264 | return -EINVAL; | |
265 | } | |
266 | ||
267 | return 0; | |
268 | } | |
269 | ||
270 | static snd_pcm_uframes_t | |
271 | snd_usb_caiaq_pcm_pointer(struct snd_pcm_substream *sub) | |
272 | { | |
273 | int index = sub->number; | |
274 | struct snd_usb_caiaqdev *dev = snd_pcm_substream_chip(sub); | |
275 | ||
276 | if (dev->input_panic || dev->output_panic) | |
277 | return SNDRV_PCM_POS_XRUN; | |
278 | ||
279 | if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
280 | return bytes_to_frames(sub->runtime, | |
281 | dev->audio_out_buf_pos[index]); | |
282 | else | |
283 | return bytes_to_frames(sub->runtime, | |
284 | dev->audio_in_buf_pos[index]); | |
285 | } | |
286 | ||
287 | /* operators for both playback and capture */ | |
288 | static struct snd_pcm_ops snd_usb_caiaq_ops = { | |
289 | .open = snd_usb_caiaq_substream_open, | |
290 | .close = snd_usb_caiaq_substream_close, | |
291 | .ioctl = snd_pcm_lib_ioctl, | |
292 | .hw_params = snd_usb_caiaq_pcm_hw_params, | |
293 | .hw_free = snd_usb_caiaq_pcm_hw_free, | |
294 | .prepare = snd_usb_caiaq_pcm_prepare, | |
295 | .trigger = snd_usb_caiaq_pcm_trigger, | |
296 | .pointer = snd_usb_caiaq_pcm_pointer | |
297 | }; | |
298 | ||
299 | static void check_for_elapsed_periods(struct snd_usb_caiaqdev *dev, | |
300 | struct snd_pcm_substream **subs) | |
301 | { | |
302 | int stream, pb, *cnt; | |
303 | struct snd_pcm_substream *sub; | |
304 | ||
305 | for (stream = 0; stream < dev->n_streams; stream++) { | |
306 | sub = subs[stream]; | |
307 | if (!sub) | |
308 | continue; | |
309 | ||
310 | pb = frames_to_bytes(sub->runtime, | |
311 | sub->runtime->period_size); | |
312 | cnt = (sub->stream == SNDRV_PCM_STREAM_PLAYBACK) ? | |
313 | &dev->period_out_count[stream] : | |
314 | &dev->period_in_count[stream]; | |
315 | ||
316 | if (*cnt >= pb) { | |
317 | snd_pcm_period_elapsed(sub); | |
318 | *cnt %= pb; | |
319 | } | |
320 | } | |
321 | } | |
322 | ||
323 | static void read_in_urb_mode0(struct snd_usb_caiaqdev *dev, | |
324 | const struct urb *urb, | |
325 | const struct usb_iso_packet_descriptor *iso) | |
326 | { | |
327 | unsigned char *usb_buf = urb->transfer_buffer + iso->offset; | |
328 | struct snd_pcm_substream *sub; | |
329 | int stream, i; | |
330 | ||
331 | if (all_substreams_zero(dev->sub_capture)) | |
332 | return; | |
333 | ||
334 | spin_lock(&dev->spinlock); | |
335 | ||
336 | for (i = 0; i < iso->actual_length;) { | |
337 | for (stream = 0; stream < dev->n_streams; stream++, i++) { | |
338 | sub = dev->sub_capture[stream]; | |
339 | if (sub) { | |
340 | struct snd_pcm_runtime *rt = sub->runtime; | |
341 | char *audio_buf = rt->dma_area; | |
342 | int sz = frames_to_bytes(rt, rt->buffer_size); | |
343 | audio_buf[dev->audio_in_buf_pos[stream]++] | |
344 | = usb_buf[i]; | |
345 | dev->period_in_count[stream]++; | |
346 | if (dev->audio_in_buf_pos[stream] == sz) | |
347 | dev->audio_in_buf_pos[stream] = 0; | |
348 | } | |
349 | } | |
350 | } | |
351 | ||
352 | spin_unlock(&dev->spinlock); | |
353 | } | |
354 | ||
355 | static void read_in_urb_mode2(struct snd_usb_caiaqdev *dev, | |
356 | const struct urb *urb, | |
357 | const struct usb_iso_packet_descriptor *iso) | |
358 | { | |
359 | unsigned char *usb_buf = urb->transfer_buffer + iso->offset; | |
360 | unsigned char check_byte; | |
361 | struct snd_pcm_substream *sub; | |
362 | int stream, i; | |
363 | ||
364 | spin_lock(&dev->spinlock); | |
365 | ||
366 | for (i = 0; i < iso->actual_length;) { | |
367 | if (i % (dev->n_streams * BYTES_PER_SAMPLE_USB) == 0) { | |
368 | for (stream = 0; | |
369 | stream < dev->n_streams; | |
370 | stream++, i++) { | |
371 | if (dev->first_packet) | |
372 | continue; | |
373 | ||
374 | check_byte = MAKE_CHECKBYTE(dev, stream, i); | |
375 | ||
376 | if ((usb_buf[i] & 0x3f) != check_byte) | |
377 | dev->input_panic = 1; | |
378 | ||
379 | if (usb_buf[i] & 0x80) | |
380 | dev->output_panic = 1; | |
381 | } | |
382 | } | |
383 | dev->first_packet = 0; | |
384 | ||
385 | for (stream = 0; stream < dev->n_streams; stream++, i++) { | |
386 | sub = dev->sub_capture[stream]; | |
387 | if (sub) { | |
388 | struct snd_pcm_runtime *rt = sub->runtime; | |
389 | char *audio_buf = rt->dma_area; | |
390 | int sz = frames_to_bytes(rt, rt->buffer_size); | |
391 | audio_buf[dev->audio_in_buf_pos[stream]++] | |
392 | = usb_buf[i]; | |
393 | dev->period_in_count[stream]++; | |
394 | if (dev->audio_in_buf_pos[stream] == sz) | |
395 | dev->audio_in_buf_pos[stream] = 0; | |
396 | } | |
397 | } | |
398 | } | |
399 | ||
400 | spin_unlock(&dev->spinlock); | |
401 | } | |
402 | ||
403 | static void read_in_urb(struct snd_usb_caiaqdev *dev, | |
404 | const struct urb *urb, | |
405 | const struct usb_iso_packet_descriptor *iso) | |
406 | { | |
407 | if (!dev->streaming) | |
408 | return; | |
409 | ||
410 | switch (dev->spec.data_alignment) { | |
411 | case 0: | |
412 | read_in_urb_mode0(dev, urb, iso); | |
413 | break; | |
414 | case 2: | |
415 | read_in_urb_mode2(dev, urb, iso); | |
416 | break; | |
417 | } | |
418 | ||
419 | if (dev->input_panic || dev->output_panic) { | |
420 | debug("streaming error detected %s %s\n", | |
421 | dev->input_panic ? "(input)" : "", | |
422 | dev->output_panic ? "(output)" : ""); | |
423 | } | |
424 | ||
425 | check_for_elapsed_periods(dev, dev->sub_capture); | |
426 | } | |
427 | ||
428 | static void fill_out_urb(struct snd_usb_caiaqdev *dev, | |
429 | struct urb *urb, | |
430 | const struct usb_iso_packet_descriptor *iso) | |
431 | { | |
432 | unsigned char *usb_buf = urb->transfer_buffer + iso->offset; | |
433 | struct snd_pcm_substream *sub; | |
434 | int stream, i; | |
435 | ||
436 | spin_lock(&dev->spinlock); | |
437 | ||
438 | for (i = 0; i < iso->length;) { | |
439 | for (stream = 0; stream < dev->n_streams; stream++) { | |
440 | sub = dev->sub_playback[stream]; | |
441 | if (sub) { | |
442 | struct snd_pcm_runtime *rt = sub->runtime; | |
443 | char *audio_buf = rt->dma_area; | |
444 | int sz = frames_to_bytes(rt, rt->buffer_size); | |
445 | usb_buf[i++] | |
446 | = audio_buf[dev->audio_out_buf_pos[stream]++]; | |
447 | dev->audio_out_buf_pos[stream]++; | |
448 | if (dev->audio_out_buf_pos[stream] == sz) | |
449 | dev->audio_out_buf_pos[stream] = 0; | |
450 | } else | |
451 | usb_buf[i++] = 0; | |
452 | ||
453 | /* fill in the check bytes */ | |
454 | if (dev->spec.data_alignment == 2 && | |
455 | i % (dev->n_streams * BYTES_PER_SAMPLE_USB) == | |
456 | (dev->n_streams * CHANNELS_PER_STREAM)) | |
457 | for (stream = 0; stream < dev->n_streams; stream++, i++) | |
458 | usb_buf[i] = MAKE_CHECKBYTE(dev, stream, i); | |
459 | } | |
460 | } | |
461 | ||
462 | spin_unlock(&dev->spinlock); | |
463 | check_for_elapsed_periods(dev, dev->sub_playback); | |
464 | } | |
465 | ||
466 | static void read_completed(struct urb *urb) | |
467 | { | |
468 | struct snd_usb_caiaq_cb_info *info = urb->context; | |
469 | struct snd_usb_caiaqdev *dev; | |
470 | struct urb *out; | |
471 | int frame, len, send_it = 0, outframe = 0; | |
472 | ||
473 | if (urb->status || !info) | |
474 | return; | |
475 | ||
476 | dev = info->dev; | |
477 | if (!dev->streaming) | |
478 | return; | |
479 | ||
480 | out = dev->data_urbs_out[info->index]; | |
481 | ||
482 | /* read the recently received packet and send back one which has | |
483 | * the same layout */ | |
484 | for (frame = 0; frame < FRAMES_PER_URB; frame++) { | |
485 | if (urb->iso_frame_desc[frame].status) | |
486 | continue; | |
487 | ||
488 | len = urb->iso_frame_desc[outframe].actual_length; | |
489 | out->iso_frame_desc[outframe].length = len; | |
490 | out->iso_frame_desc[outframe].actual_length = 0; | |
491 | out->iso_frame_desc[outframe].offset = BYTES_PER_FRAME * frame; | |
492 | ||
493 | if (len > 0) { | |
494 | fill_out_urb(dev, out, &out->iso_frame_desc[outframe]); | |
495 | read_in_urb(dev, urb, &urb->iso_frame_desc[frame]); | |
496 | send_it = 1; | |
497 | } | |
498 | ||
499 | outframe++; | |
500 | } | |
501 | ||
502 | if (send_it) { | |
503 | out->number_of_packets = FRAMES_PER_URB; | |
504 | out->transfer_flags = URB_ISO_ASAP; | |
505 | usb_submit_urb(out, GFP_ATOMIC); | |
506 | } | |
507 | ||
508 | /* re-submit inbound urb */ | |
509 | for (frame = 0; frame < FRAMES_PER_URB; frame++) { | |
510 | urb->iso_frame_desc[frame].offset = BYTES_PER_FRAME * frame; | |
511 | urb->iso_frame_desc[frame].length = BYTES_PER_FRAME; | |
512 | urb->iso_frame_desc[frame].actual_length = 0; | |
513 | } | |
514 | ||
515 | urb->number_of_packets = FRAMES_PER_URB; | |
516 | urb->transfer_flags = URB_ISO_ASAP; | |
517 | usb_submit_urb(urb, GFP_ATOMIC); | |
518 | } | |
519 | ||
520 | static void write_completed(struct urb *urb) | |
521 | { | |
522 | struct snd_usb_caiaq_cb_info *info = urb->context; | |
523 | struct snd_usb_caiaqdev *dev = info->dev; | |
524 | ||
525 | if (!dev->output_running) { | |
526 | dev->output_running = 1; | |
527 | wake_up(&dev->prepare_wait_queue); | |
528 | } | |
529 | } | |
530 | ||
531 | static struct urb **alloc_urbs(struct snd_usb_caiaqdev *dev, int dir, int *ret) | |
532 | { | |
533 | int i, frame; | |
534 | struct urb **urbs; | |
535 | struct usb_device *usb_dev = dev->chip.dev; | |
536 | unsigned int pipe; | |
537 | ||
538 | pipe = (dir == SNDRV_PCM_STREAM_PLAYBACK) ? | |
539 | usb_sndisocpipe(usb_dev, ENDPOINT_PLAYBACK) : | |
540 | usb_rcvisocpipe(usb_dev, ENDPOINT_CAPTURE); | |
541 | ||
542 | urbs = kmalloc(N_URBS * sizeof(*urbs), GFP_KERNEL); | |
543 | if (!urbs) { | |
544 | log("unable to kmalloc() urbs, OOM!?\n"); | |
545 | *ret = -ENOMEM; | |
546 | return NULL; | |
547 | } | |
548 | ||
549 | for (i = 0; i < N_URBS; i++) { | |
550 | urbs[i] = usb_alloc_urb(FRAMES_PER_URB, GFP_KERNEL); | |
551 | if (!urbs[i]) { | |
552 | log("unable to usb_alloc_urb(), OOM!?\n"); | |
553 | *ret = -ENOMEM; | |
554 | return urbs; | |
555 | } | |
556 | ||
557 | urbs[i]->transfer_buffer = | |
558 | kmalloc(FRAMES_PER_URB * BYTES_PER_FRAME, GFP_KERNEL); | |
559 | if (!urbs[i]->transfer_buffer) { | |
560 | log("unable to kmalloc() transfer buffer, OOM!?\n"); | |
561 | *ret = -ENOMEM; | |
562 | return urbs; | |
563 | } | |
564 | ||
565 | for (frame = 0; frame < FRAMES_PER_URB; frame++) { | |
566 | struct usb_iso_packet_descriptor *iso = | |
567 | &urbs[i]->iso_frame_desc[frame]; | |
568 | ||
569 | iso->offset = BYTES_PER_FRAME * frame; | |
570 | iso->length = BYTES_PER_FRAME; | |
571 | } | |
572 | ||
573 | urbs[i]->dev = usb_dev; | |
574 | urbs[i]->pipe = pipe; | |
575 | urbs[i]->transfer_buffer_length = FRAMES_PER_URB | |
576 | * BYTES_PER_FRAME; | |
577 | urbs[i]->context = &dev->data_cb_info[i]; | |
578 | urbs[i]->interval = 1; | |
579 | urbs[i]->transfer_flags = URB_ISO_ASAP; | |
580 | urbs[i]->number_of_packets = FRAMES_PER_URB; | |
581 | urbs[i]->complete = (dir == SNDRV_PCM_STREAM_CAPTURE) ? | |
582 | read_completed : write_completed; | |
583 | } | |
584 | ||
585 | *ret = 0; | |
586 | return urbs; | |
587 | } | |
588 | ||
589 | static void free_urbs(struct urb **urbs) | |
590 | { | |
591 | int i; | |
592 | ||
593 | if (!urbs) | |
594 | return; | |
595 | ||
596 | for (i = 0; i < N_URBS; i++) { | |
597 | if (!urbs[i]) | |
598 | continue; | |
599 | ||
600 | usb_kill_urb(urbs[i]); | |
601 | kfree(urbs[i]->transfer_buffer); | |
602 | usb_free_urb(urbs[i]); | |
603 | } | |
604 | ||
605 | kfree(urbs); | |
606 | } | |
607 | ||
608 | int __devinit snd_usb_caiaq_audio_init(struct snd_usb_caiaqdev *dev) | |
609 | { | |
610 | int i, ret; | |
611 | ||
612 | dev->n_audio_in = max(dev->spec.num_analog_audio_in, | |
613 | dev->spec.num_digital_audio_in) / | |
614 | CHANNELS_PER_STREAM; | |
615 | dev->n_audio_out = max(dev->spec.num_analog_audio_out, | |
616 | dev->spec.num_digital_audio_out) / | |
617 | CHANNELS_PER_STREAM; | |
618 | dev->n_streams = max(dev->n_audio_in, dev->n_audio_out); | |
619 | ||
620 | debug("dev->n_audio_in = %d\n", dev->n_audio_in); | |
621 | debug("dev->n_audio_out = %d\n", dev->n_audio_out); | |
622 | debug("dev->n_streams = %d\n", dev->n_streams); | |
623 | ||
624 | if (dev->n_streams > MAX_STREAMS) { | |
625 | log("unable to initialize device, too many streams.\n"); | |
626 | return -EINVAL; | |
627 | } | |
628 | ||
629 | ret = snd_pcm_new(dev->chip.card, dev->product_name, 0, | |
630 | dev->n_audio_out, dev->n_audio_in, &dev->pcm); | |
631 | ||
632 | if (ret < 0) { | |
633 | log("snd_pcm_new() returned %d\n", ret); | |
634 | return ret; | |
635 | } | |
636 | ||
637 | dev->pcm->private_data = dev; | |
638 | strcpy(dev->pcm->name, dev->product_name); | |
639 | ||
640 | memset(dev->sub_playback, 0, sizeof(dev->sub_playback)); | |
641 | memset(dev->sub_capture, 0, sizeof(dev->sub_capture)); | |
642 | ||
643 | memcpy(&dev->pcm_info, &snd_usb_caiaq_pcm_hardware, | |
644 | sizeof(snd_usb_caiaq_pcm_hardware)); | |
645 | ||
646 | /* setup samplerates */ | |
647 | dev->samplerates = dev->pcm_info.rates; | |
648 | switch (dev->chip.usb_id) { | |
649 | case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AK1): | |
650 | dev->samplerates |= SNDRV_PCM_RATE_88200; | |
651 | dev->samplerates |= SNDRV_PCM_RATE_192000; | |
652 | break; | |
653 | case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO8DJ): | |
654 | dev->samplerates |= SNDRV_PCM_RATE_88200; | |
655 | break; | |
656 | } | |
657 | ||
658 | snd_pcm_set_ops(dev->pcm, SNDRV_PCM_STREAM_PLAYBACK, | |
659 | &snd_usb_caiaq_ops); | |
660 | snd_pcm_set_ops(dev->pcm, SNDRV_PCM_STREAM_CAPTURE, | |
661 | &snd_usb_caiaq_ops); | |
662 | ||
663 | snd_pcm_lib_preallocate_pages_for_all(dev->pcm, | |
664 | SNDRV_DMA_TYPE_CONTINUOUS, | |
665 | snd_dma_continuous_data(GFP_KERNEL), | |
666 | MAX_BUFFER_SIZE, MAX_BUFFER_SIZE); | |
667 | ||
668 | dev->data_cb_info = | |
669 | kmalloc(sizeof(struct snd_usb_caiaq_cb_info) * N_URBS, | |
670 | GFP_KERNEL); | |
671 | ||
672 | if (!dev->data_cb_info) | |
673 | return -ENOMEM; | |
674 | ||
675 | for (i = 0; i < N_URBS; i++) { | |
676 | dev->data_cb_info[i].dev = dev; | |
677 | dev->data_cb_info[i].index = i; | |
678 | } | |
679 | ||
680 | dev->data_urbs_in = alloc_urbs(dev, SNDRV_PCM_STREAM_CAPTURE, &ret); | |
681 | if (ret < 0) { | |
682 | kfree(dev->data_cb_info); | |
683 | free_urbs(dev->data_urbs_in); | |
684 | return ret; | |
685 | } | |
686 | ||
687 | dev->data_urbs_out = alloc_urbs(dev, SNDRV_PCM_STREAM_PLAYBACK, &ret); | |
688 | if (ret < 0) { | |
689 | kfree(dev->data_cb_info); | |
690 | free_urbs(dev->data_urbs_in); | |
691 | free_urbs(dev->data_urbs_out); | |
692 | return ret; | |
693 | } | |
694 | ||
695 | return 0; | |
696 | } | |
697 | ||
698 | void snd_usb_caiaq_audio_free(struct snd_usb_caiaqdev *dev) | |
699 | { | |
700 | debug("snd_usb_caiaq_audio_free (%p)\n", dev); | |
701 | stream_stop(dev); | |
702 | free_urbs(dev->data_urbs_in); | |
703 | free_urbs(dev->data_urbs_out); | |
704 | kfree(dev->data_cb_info); | |
705 | } | |
706 |