Commit | Line | Data |
---|---|---|
705ececd | 1 | /* |
c078a4aa | 2 | * Line 6 Linux USB driver |
705ececd | 3 | * |
1027f476 | 4 | * Copyright (C) 2004-2010 Markus Grabner (grabner@icg.tugraz.at) |
705ececd MG |
5 | * |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License as | |
8 | * published by the Free Software Foundation, version 2. | |
9 | * | |
10 | */ | |
11 | ||
140e28b8 | 12 | #include <linux/slab.h> |
705ececd MG |
13 | #include <sound/core.h> |
14 | #include <sound/pcm.h> | |
15 | #include <sound/pcm_params.h> | |
16 | ||
1027f476 MG |
17 | #include "capture.h" |
18 | #include "driver.h" | |
705ececd | 19 | #include "pcm.h" |
b702ed25 | 20 | #include "playback.h" |
705ececd | 21 | |
705ececd MG |
22 | /* |
23 | Software stereo volume control. | |
24 | */ | |
010f378e GKH |
25 | static void change_volume(struct urb *urb_out, int volume[], |
26 | int bytes_per_frame) | |
705ececd MG |
27 | { |
28 | int chn = 0; | |
29 | ||
010f378e | 30 | if (volume[0] == 256 && volume[1] == 256) |
45af4977 | 31 | return; /* maximum volume - no change */ |
705ececd | 32 | |
010f378e | 33 | if (bytes_per_frame == 4) { |
705ececd | 34 | short *p, *buf_end; |
a6b4699d | 35 | |
705ececd MG |
36 | p = (short *)urb_out->transfer_buffer; |
37 | buf_end = p + urb_out->transfer_buffer_length / sizeof(*p); | |
38 | ||
010f378e | 39 | for (; p < buf_end; ++p) { |
c8491535 TI |
40 | int val = (*p * volume[chn & 1]) >> 8; |
41 | *p = clamp(val, 0x7fff, -0x8000); | |
705ececd MG |
42 | ++chn; |
43 | } | |
010f378e | 44 | } else if (bytes_per_frame == 6) { |
705ececd | 45 | unsigned char *p, *buf_end; |
f3c5261e | 46 | |
705ececd MG |
47 | p = (unsigned char *)urb_out->transfer_buffer; |
48 | buf_end = p + urb_out->transfer_buffer_length; | |
49 | ||
010f378e GKH |
50 | for (; p < buf_end; p += 3) { |
51 | int val; | |
a6b4699d | 52 | |
010f378e | 53 | val = p[0] + (p[1] << 8) + ((signed char)p[2] << 16); |
705ececd | 54 | val = (val * volume[chn & 1]) >> 8; |
c8491535 | 55 | val = clamp(val, 0x7fffff, -0x800000); |
705ececd MG |
56 | p[0] = val; |
57 | p[1] = val >> 8; | |
58 | p[2] = val >> 16; | |
59 | ++chn; | |
60 | } | |
61 | } | |
62 | } | |
63 | ||
1027f476 MG |
64 | /* |
65 | Create signal for impulse response test. | |
66 | */ | |
67 | static void create_impulse_test_signal(struct snd_line6_pcm *line6pcm, | |
68 | struct urb *urb_out, int bytes_per_frame) | |
69 | { | |
70 | int frames = urb_out->transfer_buffer_length / bytes_per_frame; | |
71 | ||
72 | if (bytes_per_frame == 4) { | |
e1a164d7 MG |
73 | int i; |
74 | short *pi = (short *)line6pcm->prev_fbuf; | |
75 | short *po = (short *)urb_out->transfer_buffer; | |
76 | ||
77 | for (i = 0; i < frames; ++i) { | |
78 | po[0] = pi[0]; | |
79 | po[1] = 0; | |
80 | pi += 2; | |
81 | po += 2; | |
82 | } | |
1027f476 MG |
83 | } else if (bytes_per_frame == 6) { |
84 | int i, j; | |
85 | unsigned char *pi = line6pcm->prev_fbuf; | |
86 | unsigned char *po = urb_out->transfer_buffer; | |
87 | ||
88 | for (i = 0; i < frames; ++i) { | |
89 | for (j = 0; j < bytes_per_frame / 2; ++j) | |
90 | po[j] = pi[j]; | |
91 | ||
92 | for (; j < bytes_per_frame; ++j) | |
93 | po[j] = 0; | |
94 | ||
95 | pi += bytes_per_frame; | |
96 | po += bytes_per_frame; | |
97 | } | |
e1a164d7 MG |
98 | } |
99 | if (--line6pcm->impulse_count <= 0) { | |
100 | ((unsigned char *)(urb_out->transfer_buffer))[bytes_per_frame - | |
101 | 1] = | |
102 | line6pcm->impulse_volume; | |
103 | line6pcm->impulse_count = line6pcm->impulse_period; | |
1027f476 MG |
104 | } |
105 | } | |
106 | ||
1027f476 MG |
107 | /* |
108 | Add signal to buffer for software monitoring. | |
109 | */ | |
110 | static void add_monitor_signal(struct urb *urb_out, unsigned char *signal, | |
111 | int volume, int bytes_per_frame) | |
112 | { | |
113 | if (volume == 0) | |
114 | return; /* zero volume - no change */ | |
115 | ||
116 | if (bytes_per_frame == 4) { | |
117 | short *pi, *po, *buf_end; | |
a6b4699d | 118 | |
1027f476 MG |
119 | pi = (short *)signal; |
120 | po = (short *)urb_out->transfer_buffer; | |
121 | buf_end = po + urb_out->transfer_buffer_length / sizeof(*po); | |
122 | ||
c8491535 TI |
123 | for (; po < buf_end; ++pi, ++po) { |
124 | int val = *po + ((*pi * volume) >> 8); | |
125 | *po = clamp(val, 0x7fff, -0x8000); | |
126 | } | |
1027f476 MG |
127 | } |
128 | ||
129 | /* | |
e1a164d7 MG |
130 | We don't need to handle devices with 6 bytes per frame here |
131 | since they all support hardware monitoring. | |
132 | */ | |
1027f476 MG |
133 | } |
134 | ||
705ececd MG |
135 | /* |
136 | Find a free URB, prepare audio data, and submit URB. | |
137 | */ | |
1027f476 | 138 | static int submit_audio_out_urb(struct snd_line6_pcm *line6pcm) |
705ececd MG |
139 | { |
140 | int index; | |
141 | unsigned long flags; | |
142 | int i, urb_size, urb_frames; | |
e1a164d7 | 143 | int ret; |
705ececd | 144 | const int bytes_per_frame = line6pcm->properties->bytes_per_frame; |
45af4977 SB |
145 | const int frame_increment = |
146 | line6pcm->properties->snd_line6_rates.rats[0].num_min; | |
147 | const int frame_factor = | |
148 | line6pcm->properties->snd_line6_rates.rats[0].den * | |
149 | (USB_INTERVALS_PER_SECOND / LINE6_ISO_INTERVAL); | |
705ececd MG |
150 | struct urb *urb_out; |
151 | ||
ad0119ab | 152 | spin_lock_irqsave(&line6pcm->out.lock, flags); |
45af4977 | 153 | index = |
ad0119ab | 154 | find_first_zero_bit(&line6pcm->out.active_urbs, LINE6_ISO_BUFFERS); |
705ececd | 155 | |
010f378e | 156 | if (index < 0 || index >= LINE6_ISO_BUFFERS) { |
ad0119ab | 157 | spin_unlock_irqrestore(&line6pcm->out.lock, flags); |
1027f476 | 158 | dev_err(line6pcm->line6->ifcdev, "no free URB found\n"); |
705ececd MG |
159 | return -EINVAL; |
160 | } | |
161 | ||
ad0119ab | 162 | urb_out = line6pcm->out.urbs[index]; |
705ececd MG |
163 | urb_size = 0; |
164 | ||
010f378e | 165 | for (i = 0; i < LINE6_ISO_PACKETS; ++i) { |
705ececd | 166 | /* compute frame size for given sampling rate */ |
1027f476 | 167 | int fsize = 0; |
45af4977 SB |
168 | struct usb_iso_packet_descriptor *fout = |
169 | &urb_out->iso_frame_desc[i]; | |
1027f476 | 170 | |
0ca54888 | 171 | if (line6pcm->flags & LINE6_BITS_CAPTURE_STREAM) |
1027f476 | 172 | fsize = line6pcm->prev_fsize; |
1027f476 MG |
173 | |
174 | if (fsize == 0) { | |
175 | int n; | |
a6b4699d | 176 | |
ad0119ab TI |
177 | line6pcm->out.count += frame_increment; |
178 | n = line6pcm->out.count / frame_factor; | |
179 | line6pcm->out.count -= n * frame_factor; | |
1027f476 MG |
180 | fsize = n * bytes_per_frame; |
181 | } | |
182 | ||
705ececd | 183 | fout->offset = urb_size; |
1027f476 MG |
184 | fout->length = fsize; |
185 | urb_size += fsize; | |
186 | } | |
187 | ||
188 | if (urb_size == 0) { | |
189 | /* can't determine URB size */ | |
ad0119ab | 190 | spin_unlock_irqrestore(&line6pcm->out.lock, flags); |
6a8ec876 | 191 | dev_err(line6pcm->line6->ifcdev, "driver bug: urb_size = 0\n"); |
1027f476 | 192 | return -EINVAL; |
705ececd MG |
193 | } |
194 | ||
195 | urb_frames = urb_size / bytes_per_frame; | |
1027f476 | 196 | urb_out->transfer_buffer = |
ad0119ab | 197 | line6pcm->out.buffer + |
153e3876 | 198 | index * LINE6_ISO_PACKETS * line6pcm->max_packet_size; |
1027f476 MG |
199 | urb_out->transfer_buffer_length = urb_size; |
200 | urb_out->context = line6pcm; | |
201 | ||
0ca54888 MG |
202 | if (test_bit(LINE6_INDEX_PCM_ALSA_PLAYBACK_STREAM, &line6pcm->flags) && |
203 | !test_bit(LINE6_INDEX_PAUSE_PLAYBACK, &line6pcm->flags)) { | |
1027f476 MG |
204 | struct snd_pcm_runtime *runtime = |
205 | get_substream(line6pcm, SNDRV_PCM_STREAM_PLAYBACK)->runtime; | |
705ececd | 206 | |
ad0119ab | 207 | if (line6pcm->out.pos + urb_frames > runtime->buffer_size) { |
705ececd | 208 | /* |
45af4977 SB |
209 | The transferred area goes over buffer boundary, |
210 | copy the data to the temp buffer. | |
211 | */ | |
705ececd | 212 | int len; |
a6b4699d | 213 | |
ad0119ab | 214 | len = runtime->buffer_size - line6pcm->out.pos; |
705ececd | 215 | |
010f378e | 216 | if (len > 0) { |
1027f476 | 217 | memcpy(urb_out->transfer_buffer, |
45af4977 | 218 | runtime->dma_area + |
ad0119ab | 219 | line6pcm->out.pos * bytes_per_frame, |
45af4977 | 220 | len * bytes_per_frame); |
1027f476 | 221 | memcpy(urb_out->transfer_buffer + |
45af4977 SB |
222 | len * bytes_per_frame, runtime->dma_area, |
223 | (urb_frames - len) * bytes_per_frame); | |
1027f476 | 224 | } else |
6a8ec876 SH |
225 | dev_err(line6pcm->line6->ifcdev, "driver bug: len = %d\n", |
226 | len); | |
010f378e | 227 | } else { |
1027f476 MG |
228 | memcpy(urb_out->transfer_buffer, |
229 | runtime->dma_area + | |
ad0119ab | 230 | line6pcm->out.pos * bytes_per_frame, |
1027f476 | 231 | urb_out->transfer_buffer_length); |
705ececd | 232 | } |
705ececd | 233 | |
ad0119ab TI |
234 | line6pcm->out.pos += urb_frames; |
235 | if (line6pcm->out.pos >= runtime->buffer_size) | |
236 | line6pcm->out.pos -= runtime->buffer_size; | |
1027f476 MG |
237 | } else { |
238 | memset(urb_out->transfer_buffer, 0, | |
239 | urb_out->transfer_buffer_length); | |
240 | } | |
705ececd | 241 | |
1027f476 | 242 | change_volume(urb_out, line6pcm->volume_playback, bytes_per_frame); |
705ececd | 243 | |
597a1e7c | 244 | if (line6pcm->prev_fbuf != NULL) { |
0ca54888 | 245 | if (line6pcm->flags & LINE6_BITS_PCM_IMPULSE) { |
1027f476 MG |
246 | create_impulse_test_signal(line6pcm, urb_out, |
247 | bytes_per_frame); | |
30bb0e71 EA |
248 | if (line6pcm->flags & |
249 | LINE6_BIT_PCM_ALSA_CAPTURE_STREAM) { | |
e1a164d7 MG |
250 | line6_capture_copy(line6pcm, |
251 | urb_out->transfer_buffer, | |
252 | urb_out-> | |
253 | transfer_buffer_length); | |
254 | line6_capture_check_period(line6pcm, | |
30bb0e71 | 255 | urb_out->transfer_buffer_length); |
1027f476 MG |
256 | } |
257 | } else { | |
1027f476 | 258 | if (! |
e1a164d7 | 259 | (line6pcm->line6-> |
4cb1a4ae | 260 | properties->capabilities & LINE6_CAP_HWMON) |
0ca54888 MG |
261 | && (line6pcm->flags & LINE6_BITS_PLAYBACK_STREAM) |
262 | && (line6pcm->flags & LINE6_BITS_CAPTURE_STREAM)) | |
1027f476 MG |
263 | add_monitor_signal(urb_out, line6pcm->prev_fbuf, |
264 | line6pcm->volume_monitor, | |
265 | bytes_per_frame); | |
1027f476 | 266 | } |
1027f476 | 267 | } |
705ececd | 268 | |
e1a164d7 MG |
269 | ret = usb_submit_urb(urb_out, GFP_ATOMIC); |
270 | ||
271 | if (ret == 0) | |
ad0119ab | 272 | set_bit(index, &line6pcm->out.active_urbs); |
705ececd | 273 | else |
1027f476 | 274 | dev_err(line6pcm->line6->ifcdev, |
e1a164d7 | 275 | "URB out #%d submission failed (%d)\n", index, ret); |
705ececd | 276 | |
ad0119ab | 277 | spin_unlock_irqrestore(&line6pcm->out.lock, flags); |
705ececd MG |
278 | return 0; |
279 | } | |
280 | ||
281 | /* | |
282 | Submit all currently available playback URBs. | |
283 | */ | |
1027f476 | 284 | int line6_submit_audio_out_all_urbs(struct snd_line6_pcm *line6pcm) |
705ececd MG |
285 | { |
286 | int ret, i; | |
287 | ||
010f378e | 288 | for (i = 0; i < LINE6_ISO_BUFFERS; ++i) { |
1027f476 | 289 | ret = submit_audio_out_urb(line6pcm); |
010f378e | 290 | if (ret < 0) |
705ececd | 291 | return ret; |
010f378e | 292 | } |
705ececd MG |
293 | |
294 | return 0; | |
295 | } | |
296 | ||
705ececd MG |
297 | /* |
298 | Callback for completed playback URB. | |
299 | */ | |
0c7ab158 | 300 | static void audio_out_callback(struct urb *urb) |
705ececd MG |
301 | { |
302 | int i, index, length = 0, shutdown = 0; | |
303 | unsigned long flags; | |
e1a164d7 | 304 | struct snd_line6_pcm *line6pcm = (struct snd_line6_pcm *)urb->context; |
45af4977 | 305 | struct snd_pcm_substream *substream = |
1027f476 MG |
306 | get_substream(line6pcm, SNDRV_PCM_STREAM_PLAYBACK); |
307 | ||
308 | #if USE_CLEAR_BUFFER_WORKAROUND | |
309 | memset(urb->transfer_buffer, 0, urb->transfer_buffer_length); | |
310 | #endif | |
311 | ||
ad0119ab | 312 | line6pcm->out.last_frame = urb->start_frame; |
705ececd MG |
313 | |
314 | /* find index of URB */ | |
9fb754b7 | 315 | for (index = 0; index < LINE6_ISO_BUFFERS; index++) |
ad0119ab | 316 | if (urb == line6pcm->out.urbs[index]) |
705ececd MG |
317 | break; |
318 | ||
9fb754b7 | 319 | if (index >= LINE6_ISO_BUFFERS) |
45af4977 | 320 | return; /* URB has been unlinked asynchronously */ |
705ececd | 321 | |
9fb754b7 | 322 | for (i = 0; i < LINE6_ISO_PACKETS; i++) |
705ececd MG |
323 | length += urb->iso_frame_desc[i].length; |
324 | ||
ad0119ab | 325 | spin_lock_irqsave(&line6pcm->out.lock, flags); |
705ececd | 326 | |
0ca54888 | 327 | if (test_bit(LINE6_INDEX_PCM_ALSA_PLAYBACK_STREAM, &line6pcm->flags)) { |
1027f476 | 328 | struct snd_pcm_runtime *runtime = substream->runtime; |
f3c5261e | 329 | |
ad0119ab | 330 | line6pcm->out.pos_done += |
1027f476 MG |
331 | length / line6pcm->properties->bytes_per_frame; |
332 | ||
ad0119ab TI |
333 | if (line6pcm->out.pos_done >= runtime->buffer_size) |
334 | line6pcm->out.pos_done -= runtime->buffer_size; | |
1027f476 | 335 | } |
705ececd | 336 | |
ad0119ab | 337 | clear_bit(index, &line6pcm->out.active_urbs); |
705ececd | 338 | |
9fb754b7 | 339 | for (i = 0; i < LINE6_ISO_PACKETS; i++) |
e1a164d7 | 340 | if (urb->iso_frame_desc[i].status == -EXDEV) { |
705ececd MG |
341 | shutdown = 1; |
342 | break; | |
343 | } | |
344 | ||
ad0119ab | 345 | if (test_and_clear_bit(index, &line6pcm->out.unlink_urbs)) |
705ececd MG |
346 | shutdown = 1; |
347 | ||
ad0119ab | 348 | spin_unlock_irqrestore(&line6pcm->out.lock, flags); |
705ececd | 349 | |
010f378e | 350 | if (!shutdown) { |
1027f476 | 351 | submit_audio_out_urb(line6pcm); |
705ececd | 352 | |
6a8ec876 SH |
353 | if (test_bit(LINE6_INDEX_PCM_ALSA_PLAYBACK_STREAM, |
354 | &line6pcm->flags)) { | |
ad0119ab TI |
355 | line6pcm->out.bytes += length; |
356 | if (line6pcm->out.bytes >= line6pcm->out.period) { | |
357 | line6pcm->out.bytes %= line6pcm->out.period; | |
1027f476 MG |
358 | snd_pcm_period_elapsed(substream); |
359 | } | |
705ececd MG |
360 | } |
361 | } | |
362 | } | |
363 | ||
364 | /* open playback callback */ | |
365 | static int snd_line6_playback_open(struct snd_pcm_substream *substream) | |
366 | { | |
367 | int err; | |
368 | struct snd_pcm_runtime *runtime = substream->runtime; | |
369 | struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream); | |
370 | ||
010f378e | 371 | err = snd_pcm_hw_constraint_ratdens(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, |
e1a164d7 MG |
372 | (&line6pcm-> |
373 | properties->snd_line6_rates)); | |
010f378e | 374 | if (err < 0) |
705ececd MG |
375 | return err; |
376 | ||
377 | runtime->hw = line6pcm->properties->snd_line6_playback_hw; | |
378 | return 0; | |
379 | } | |
380 | ||
381 | /* close playback callback */ | |
382 | static int snd_line6_playback_close(struct snd_pcm_substream *substream) | |
383 | { | |
384 | return 0; | |
385 | } | |
386 | ||
387 | /* hw_params playback callback */ | |
45af4977 SB |
388 | static int snd_line6_playback_hw_params(struct snd_pcm_substream *substream, |
389 | struct snd_pcm_hw_params *hw_params) | |
705ececd MG |
390 | { |
391 | int ret; | |
392 | struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream); | |
393 | ||
0ca54888 | 394 | ret = line6_pcm_acquire(line6pcm, LINE6_BIT_PCM_ALSA_PLAYBACK_BUFFER); |
140e28b8 | 395 | |
0ca54888 MG |
396 | if (ret < 0) |
397 | return ret; | |
140e28b8 | 398 | |
010f378e GKH |
399 | ret = snd_pcm_lib_malloc_pages(substream, |
400 | params_buffer_bytes(hw_params)); | |
0ca54888 MG |
401 | if (ret < 0) { |
402 | line6_pcm_release(line6pcm, LINE6_BIT_PCM_ALSA_PLAYBACK_BUFFER); | |
705ececd | 403 | return ret; |
0ca54888 | 404 | } |
705ececd | 405 | |
ad0119ab | 406 | line6pcm->out.period = params_period_bytes(hw_params); |
705ececd MG |
407 | return 0; |
408 | } | |
409 | ||
410 | /* hw_free playback callback */ | |
411 | static int snd_line6_playback_hw_free(struct snd_pcm_substream *substream) | |
412 | { | |
140e28b8 | 413 | struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream); |
f3c5261e | 414 | |
0ca54888 | 415 | line6_pcm_release(line6pcm, LINE6_BIT_PCM_ALSA_PLAYBACK_BUFFER); |
705ececd MG |
416 | return snd_pcm_lib_free_pages(substream); |
417 | } | |
418 | ||
419 | /* trigger playback callback */ | |
1027f476 | 420 | int snd_line6_playback_trigger(struct snd_line6_pcm *line6pcm, int cmd) |
705ececd | 421 | { |
705ececd | 422 | int err; |
705ececd | 423 | |
010f378e | 424 | switch (cmd) { |
705ececd | 425 | case SNDRV_PCM_TRIGGER_START: |
1027f476 | 426 | case SNDRV_PCM_TRIGGER_RESUME: |
6a8ec876 SH |
427 | err = line6_pcm_acquire(line6pcm, |
428 | LINE6_BIT_PCM_ALSA_PLAYBACK_STREAM); | |
705ececd | 429 | |
1027f476 MG |
430 | if (err < 0) |
431 | return err; | |
705ececd MG |
432 | |
433 | break; | |
434 | ||
435 | case SNDRV_PCM_TRIGGER_STOP: | |
1027f476 | 436 | case SNDRV_PCM_TRIGGER_SUSPEND: |
6a8ec876 SH |
437 | err = line6_pcm_release(line6pcm, |
438 | LINE6_BIT_PCM_ALSA_PLAYBACK_STREAM); | |
1027f476 MG |
439 | |
440 | if (err < 0) | |
441 | return err; | |
705ececd MG |
442 | |
443 | break; | |
444 | ||
445 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: | |
0ca54888 | 446 | set_bit(LINE6_INDEX_PAUSE_PLAYBACK, &line6pcm->flags); |
705ececd MG |
447 | break; |
448 | ||
449 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: | |
0ca54888 | 450 | clear_bit(LINE6_INDEX_PAUSE_PLAYBACK, &line6pcm->flags); |
705ececd MG |
451 | break; |
452 | ||
453 | default: | |
454 | return -EINVAL; | |
455 | } | |
456 | ||
457 | return 0; | |
458 | } | |
459 | ||
460 | /* playback pointer callback */ | |
461 | static snd_pcm_uframes_t | |
462 | snd_line6_playback_pointer(struct snd_pcm_substream *substream) | |
463 | { | |
464 | struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream); | |
f3c5261e | 465 | |
ad0119ab | 466 | return line6pcm->out.pos_done; |
705ececd MG |
467 | } |
468 | ||
469 | /* playback operators */ | |
470 | struct snd_pcm_ops snd_line6_playback_ops = { | |
e1a164d7 MG |
471 | .open = snd_line6_playback_open, |
472 | .close = snd_line6_playback_close, | |
473 | .ioctl = snd_pcm_lib_ioctl, | |
474 | .hw_params = snd_line6_playback_hw_params, | |
475 | .hw_free = snd_line6_playback_hw_free, | |
476 | .prepare = snd_line6_prepare, | |
477 | .trigger = snd_line6_trigger, | |
478 | .pointer = snd_line6_playback_pointer, | |
705ececd MG |
479 | }; |
480 | ||
1027f476 | 481 | int line6_create_audio_out_urbs(struct snd_line6_pcm *line6pcm) |
705ececd | 482 | { |
16d603d3 | 483 | struct usb_line6 *line6 = line6pcm->line6; |
705ececd MG |
484 | int i; |
485 | ||
486 | /* create audio URBs and fill in constant values: */ | |
010f378e | 487 | for (i = 0; i < LINE6_ISO_BUFFERS; ++i) { |
705ececd MG |
488 | struct urb *urb; |
489 | ||
490 | /* URB for audio out: */ | |
ad0119ab | 491 | urb = line6pcm->out.urbs[i] = |
45af4977 | 492 | usb_alloc_urb(LINE6_ISO_PACKETS, GFP_KERNEL); |
705ececd | 493 | |
a019f5e8 | 494 | if (urb == NULL) |
705ececd | 495 | return -ENOMEM; |
705ececd | 496 | |
16d603d3 | 497 | urb->dev = line6->usbdev; |
45af4977 | 498 | urb->pipe = |
16d603d3 CR |
499 | usb_sndisocpipe(line6->usbdev, |
500 | line6->properties->ep_audio_w & | |
e1a164d7 | 501 | USB_ENDPOINT_NUMBER_MASK); |
705ececd MG |
502 | urb->transfer_flags = URB_ISO_ASAP; |
503 | urb->start_frame = -1; | |
504 | urb->number_of_packets = LINE6_ISO_PACKETS; | |
505 | urb->interval = LINE6_ISO_INTERVAL; | |
506 | urb->error_count = 0; | |
507 | urb->complete = audio_out_callback; | |
508 | } | |
509 | ||
510 | return 0; | |
511 | } |