Commit | Line | Data |
---|---|---|
705ececd | 1 | /* |
e1a164d7 | 2 | * Line6 Linux USB driver - 0.9.1beta |
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 | ||
17 | #include "audio.h" | |
1027f476 MG |
18 | #include "capture.h" |
19 | #include "driver.h" | |
705ececd MG |
20 | #include "pcm.h" |
21 | #include "pod.h" | |
b702ed25 | 22 | #include "playback.h" |
705ececd | 23 | |
705ececd MG |
24 | /* |
25 | Software stereo volume control. | |
26 | */ | |
010f378e GKH |
27 | static void change_volume(struct urb *urb_out, int volume[], |
28 | int bytes_per_frame) | |
705ececd MG |
29 | { |
30 | int chn = 0; | |
31 | ||
010f378e | 32 | if (volume[0] == 256 && volume[1] == 256) |
45af4977 | 33 | return; /* maximum volume - no change */ |
705ececd | 34 | |
010f378e | 35 | if (bytes_per_frame == 4) { |
705ececd MG |
36 | short *p, *buf_end; |
37 | p = (short *)urb_out->transfer_buffer; | |
38 | buf_end = p + urb_out->transfer_buffer_length / sizeof(*p); | |
39 | ||
010f378e | 40 | for (; p < buf_end; ++p) { |
705ececd MG |
41 | *p = (*p * volume[chn & 1]) >> 8; |
42 | ++chn; | |
43 | } | |
010f378e | 44 | } else if (bytes_per_frame == 6) { |
705ececd MG |
45 | unsigned char *p, *buf_end; |
46 | p = (unsigned char *)urb_out->transfer_buffer; | |
47 | buf_end = p + urb_out->transfer_buffer_length; | |
48 | ||
010f378e GKH |
49 | for (; p < buf_end; p += 3) { |
50 | int val; | |
51 | val = p[0] + (p[1] << 8) + ((signed char)p[2] << 16); | |
705ececd MG |
52 | val = (val * volume[chn & 1]) >> 8; |
53 | p[0] = val; | |
54 | p[1] = val >> 8; | |
55 | p[2] = val >> 16; | |
56 | ++chn; | |
57 | } | |
58 | } | |
59 | } | |
60 | ||
1027f476 MG |
61 | #ifdef CONFIG_LINE6_USB_IMPULSE_RESPONSE |
62 | ||
63 | /* | |
64 | Create signal for impulse response test. | |
65 | */ | |
66 | static void create_impulse_test_signal(struct snd_line6_pcm *line6pcm, | |
67 | struct urb *urb_out, int bytes_per_frame) | |
68 | { | |
69 | int frames = urb_out->transfer_buffer_length / bytes_per_frame; | |
70 | ||
71 | if (bytes_per_frame == 4) { | |
e1a164d7 MG |
72 | int i; |
73 | short *pi = (short *)line6pcm->prev_fbuf; | |
74 | short *po = (short *)urb_out->transfer_buffer; | |
75 | ||
76 | for (i = 0; i < frames; ++i) { | |
77 | po[0] = pi[0]; | |
78 | po[1] = 0; | |
79 | pi += 2; | |
80 | po += 2; | |
81 | } | |
1027f476 MG |
82 | } else if (bytes_per_frame == 6) { |
83 | int i, j; | |
84 | unsigned char *pi = line6pcm->prev_fbuf; | |
85 | unsigned char *po = urb_out->transfer_buffer; | |
86 | ||
87 | for (i = 0; i < frames; ++i) { | |
88 | for (j = 0; j < bytes_per_frame / 2; ++j) | |
89 | po[j] = pi[j]; | |
90 | ||
91 | for (; j < bytes_per_frame; ++j) | |
92 | po[j] = 0; | |
93 | ||
94 | pi += bytes_per_frame; | |
95 | po += bytes_per_frame; | |
96 | } | |
e1a164d7 MG |
97 | } |
98 | if (--line6pcm->impulse_count <= 0) { | |
99 | ((unsigned char *)(urb_out->transfer_buffer))[bytes_per_frame - | |
100 | 1] = | |
101 | line6pcm->impulse_volume; | |
102 | line6pcm->impulse_count = line6pcm->impulse_period; | |
1027f476 MG |
103 | } |
104 | } | |
105 | ||
106 | #endif | |
107 | ||
108 | /* | |
109 | Add signal to buffer for software monitoring. | |
110 | */ | |
111 | static void add_monitor_signal(struct urb *urb_out, unsigned char *signal, | |
112 | int volume, int bytes_per_frame) | |
113 | { | |
114 | if (volume == 0) | |
115 | return; /* zero volume - no change */ | |
116 | ||
117 | if (bytes_per_frame == 4) { | |
118 | short *pi, *po, *buf_end; | |
119 | pi = (short *)signal; | |
120 | po = (short *)urb_out->transfer_buffer; | |
121 | buf_end = po + urb_out->transfer_buffer_length / sizeof(*po); | |
122 | ||
123 | for (; po < buf_end; ++pi, ++po) | |
124 | *po += (*pi * volume) >> 8; | |
125 | } | |
126 | ||
127 | /* | |
e1a164d7 MG |
128 | We don't need to handle devices with 6 bytes per frame here |
129 | since they all support hardware monitoring. | |
130 | */ | |
1027f476 MG |
131 | } |
132 | ||
705ececd MG |
133 | /* |
134 | Find a free URB, prepare audio data, and submit URB. | |
135 | */ | |
1027f476 | 136 | static int submit_audio_out_urb(struct snd_line6_pcm *line6pcm) |
705ececd MG |
137 | { |
138 | int index; | |
139 | unsigned long flags; | |
140 | int i, urb_size, urb_frames; | |
e1a164d7 | 141 | int ret; |
705ececd | 142 | const int bytes_per_frame = line6pcm->properties->bytes_per_frame; |
45af4977 SB |
143 | const int frame_increment = |
144 | line6pcm->properties->snd_line6_rates.rats[0].num_min; | |
145 | const int frame_factor = | |
146 | line6pcm->properties->snd_line6_rates.rats[0].den * | |
147 | (USB_INTERVALS_PER_SECOND / LINE6_ISO_INTERVAL); | |
705ececd MG |
148 | struct urb *urb_out; |
149 | ||
150 | spin_lock_irqsave(&line6pcm->lock_audio_out, flags); | |
45af4977 SB |
151 | index = |
152 | find_first_zero_bit(&line6pcm->active_urb_out, LINE6_ISO_BUFFERS); | |
705ececd | 153 | |
010f378e | 154 | if (index < 0 || index >= LINE6_ISO_BUFFERS) { |
705ececd | 155 | spin_unlock_irqrestore(&line6pcm->lock_audio_out, flags); |
1027f476 | 156 | dev_err(line6pcm->line6->ifcdev, "no free URB found\n"); |
705ececd MG |
157 | return -EINVAL; |
158 | } | |
159 | ||
160 | urb_out = line6pcm->urb_audio_out[index]; | |
161 | urb_size = 0; | |
162 | ||
010f378e | 163 | for (i = 0; i < LINE6_ISO_PACKETS; ++i) { |
705ececd | 164 | /* compute frame size for given sampling rate */ |
1027f476 | 165 | int fsize = 0; |
45af4977 SB |
166 | struct usb_iso_packet_descriptor *fout = |
167 | &urb_out->iso_frame_desc[i]; | |
1027f476 | 168 | |
0ca54888 | 169 | if (line6pcm->flags & LINE6_BITS_CAPTURE_STREAM) |
1027f476 | 170 | fsize = line6pcm->prev_fsize; |
1027f476 MG |
171 | |
172 | if (fsize == 0) { | |
173 | int n; | |
174 | line6pcm->count_out += frame_increment; | |
175 | n = line6pcm->count_out / frame_factor; | |
176 | line6pcm->count_out -= n * frame_factor; | |
177 | fsize = n * bytes_per_frame; | |
178 | } | |
179 | ||
705ececd | 180 | fout->offset = urb_size; |
1027f476 MG |
181 | fout->length = fsize; |
182 | urb_size += fsize; | |
183 | } | |
184 | ||
185 | if (urb_size == 0) { | |
186 | /* can't determine URB size */ | |
187 | spin_unlock_irqrestore(&line6pcm->lock_audio_out, flags); | |
188 | dev_err(line6pcm->line6->ifcdev, "driver bug: urb_size = 0\n"); /* this is somewhat paranoid */ | |
189 | return -EINVAL; | |
705ececd MG |
190 | } |
191 | ||
192 | urb_frames = urb_size / bytes_per_frame; | |
1027f476 MG |
193 | urb_out->transfer_buffer = |
194 | line6pcm->buffer_out + | |
153e3876 | 195 | index * LINE6_ISO_PACKETS * line6pcm->max_packet_size; |
1027f476 MG |
196 | urb_out->transfer_buffer_length = urb_size; |
197 | urb_out->context = line6pcm; | |
198 | ||
0ca54888 MG |
199 | if (test_bit(LINE6_INDEX_PCM_ALSA_PLAYBACK_STREAM, &line6pcm->flags) && |
200 | !test_bit(LINE6_INDEX_PAUSE_PLAYBACK, &line6pcm->flags)) { | |
1027f476 MG |
201 | struct snd_pcm_runtime *runtime = |
202 | get_substream(line6pcm, SNDRV_PCM_STREAM_PLAYBACK)->runtime; | |
705ececd | 203 | |
010f378e | 204 | if (line6pcm->pos_out + urb_frames > runtime->buffer_size) { |
705ececd | 205 | /* |
45af4977 SB |
206 | The transferred area goes over buffer boundary, |
207 | copy the data to the temp buffer. | |
208 | */ | |
705ececd MG |
209 | int len; |
210 | len = runtime->buffer_size - line6pcm->pos_out; | |
705ececd | 211 | |
010f378e | 212 | if (len > 0) { |
1027f476 | 213 | memcpy(urb_out->transfer_buffer, |
45af4977 SB |
214 | runtime->dma_area + |
215 | line6pcm->pos_out * bytes_per_frame, | |
216 | len * bytes_per_frame); | |
1027f476 | 217 | memcpy(urb_out->transfer_buffer + |
45af4977 SB |
218 | len * bytes_per_frame, runtime->dma_area, |
219 | (urb_frames - len) * bytes_per_frame); | |
1027f476 MG |
220 | } else |
221 | dev_err(line6pcm->line6->ifcdev, "driver bug: len = %d\n", len); /* this is somewhat paranoid */ | |
010f378e | 222 | } else { |
1027f476 MG |
223 | memcpy(urb_out->transfer_buffer, |
224 | runtime->dma_area + | |
225 | line6pcm->pos_out * bytes_per_frame, | |
226 | urb_out->transfer_buffer_length); | |
705ececd | 227 | } |
705ececd | 228 | |
027360c5 GKH |
229 | line6pcm->pos_out += urb_frames; |
230 | if (line6pcm->pos_out >= runtime->buffer_size) | |
1027f476 MG |
231 | line6pcm->pos_out -= runtime->buffer_size; |
232 | } else { | |
233 | memset(urb_out->transfer_buffer, 0, | |
234 | urb_out->transfer_buffer_length); | |
235 | } | |
705ececd | 236 | |
1027f476 | 237 | change_volume(urb_out, line6pcm->volume_playback, bytes_per_frame); |
705ececd | 238 | |
597a1e7c | 239 | if (line6pcm->prev_fbuf != NULL) { |
1027f476 | 240 | #ifdef CONFIG_LINE6_USB_IMPULSE_RESPONSE |
0ca54888 | 241 | if (line6pcm->flags & LINE6_BITS_PCM_IMPULSE) { |
1027f476 MG |
242 | create_impulse_test_signal(line6pcm, urb_out, |
243 | bytes_per_frame); | |
0ca54888 | 244 | if (line6pcm->flags & LINE6_BIT_PCM_ALSA_CAPTURE_STREAM) { |
e1a164d7 MG |
245 | line6_capture_copy(line6pcm, |
246 | urb_out->transfer_buffer, | |
247 | urb_out-> | |
248 | transfer_buffer_length); | |
249 | line6_capture_check_period(line6pcm, | |
250 | urb_out->transfer_buffer_length); | |
1027f476 MG |
251 | } |
252 | } else { | |
253 | #endif | |
254 | if (! | |
e1a164d7 MG |
255 | (line6pcm->line6-> |
256 | properties->capabilities & LINE6_BIT_HWMON) | |
0ca54888 MG |
257 | && (line6pcm->flags & LINE6_BITS_PLAYBACK_STREAM) |
258 | && (line6pcm->flags & LINE6_BITS_CAPTURE_STREAM)) | |
1027f476 MG |
259 | add_monitor_signal(urb_out, line6pcm->prev_fbuf, |
260 | line6pcm->volume_monitor, | |
261 | bytes_per_frame); | |
262 | #ifdef CONFIG_LINE6_USB_IMPULSE_RESPONSE | |
263 | } | |
264 | #endif | |
265 | } | |
266 | #ifdef CONFIG_LINE6_USB_DUMP_PCM | |
010f378e | 267 | for (i = 0; i < LINE6_ISO_PACKETS; ++i) { |
45af4977 SB |
268 | struct usb_iso_packet_descriptor *fout = |
269 | &urb_out->iso_frame_desc[i]; | |
270 | line6_write_hexdump(line6pcm->line6, 'P', | |
271 | urb_out->transfer_buffer + fout->offset, | |
272 | fout->length); | |
705ececd MG |
273 | } |
274 | #endif | |
275 | ||
e1a164d7 MG |
276 | ret = usb_submit_urb(urb_out, GFP_ATOMIC); |
277 | ||
278 | if (ret == 0) | |
705ececd MG |
279 | set_bit(index, &line6pcm->active_urb_out); |
280 | else | |
1027f476 | 281 | dev_err(line6pcm->line6->ifcdev, |
e1a164d7 | 282 | "URB out #%d submission failed (%d)\n", index, ret); |
705ececd MG |
283 | |
284 | spin_unlock_irqrestore(&line6pcm->lock_audio_out, flags); | |
285 | return 0; | |
286 | } | |
287 | ||
288 | /* | |
289 | Submit all currently available playback URBs. | |
290 | */ | |
1027f476 | 291 | int line6_submit_audio_out_all_urbs(struct snd_line6_pcm *line6pcm) |
705ececd MG |
292 | { |
293 | int ret, i; | |
294 | ||
010f378e | 295 | for (i = 0; i < LINE6_ISO_BUFFERS; ++i) { |
1027f476 | 296 | ret = submit_audio_out_urb(line6pcm); |
010f378e | 297 | if (ret < 0) |
705ececd | 298 | return ret; |
010f378e | 299 | } |
705ececd MG |
300 | |
301 | return 0; | |
302 | } | |
303 | ||
304 | /* | |
305 | Unlink all currently active playback URBs. | |
306 | */ | |
1027f476 | 307 | void line6_unlink_audio_out_urbs(struct snd_line6_pcm *line6pcm) |
705ececd MG |
308 | { |
309 | unsigned int i; | |
310 | ||
010f378e GKH |
311 | for (i = LINE6_ISO_BUFFERS; i--;) { |
312 | if (test_bit(i, &line6pcm->active_urb_out)) { | |
313 | if (!test_and_set_bit(i, &line6pcm->unlink_urb_out)) { | |
705ececd | 314 | struct urb *u = line6pcm->urb_audio_out[i]; |
705ececd MG |
315 | usb_unlink_urb(u); |
316 | } | |
317 | } | |
318 | } | |
319 | } | |
320 | ||
321 | /* | |
1027f476 | 322 | Wait until unlinking of all currently active playback URBs has been finished. |
705ececd | 323 | */ |
0ca54888 | 324 | void line6_wait_clear_audio_out_urbs(struct snd_line6_pcm *line6pcm) |
705ececd MG |
325 | { |
326 | int timeout = HZ; | |
327 | unsigned int i; | |
328 | int alive; | |
329 | ||
330 | do { | |
331 | alive = 0; | |
332 | for (i = LINE6_ISO_BUFFERS; i--;) { | |
333 | if (test_bit(i, &line6pcm->active_urb_out)) | |
334 | alive++; | |
335 | } | |
010f378e | 336 | if (!alive) |
705ececd MG |
337 | break; |
338 | set_current_state(TASK_UNINTERRUPTIBLE); | |
339 | schedule_timeout(1); | |
340 | } while (--timeout > 0); | |
341 | if (alive) | |
342 | snd_printk(KERN_ERR "timeout: still %d active urbs..\n", alive); | |
705ececd MG |
343 | } |
344 | ||
345 | /* | |
346 | Unlink all currently active playback URBs, and wait for finishing. | |
347 | */ | |
1027f476 | 348 | void line6_unlink_wait_clear_audio_out_urbs(struct snd_line6_pcm *line6pcm) |
705ececd | 349 | { |
1027f476 | 350 | line6_unlink_audio_out_urbs(line6pcm); |
0ca54888 | 351 | line6_wait_clear_audio_out_urbs(line6pcm); |
6b02a17e MG |
352 | } |
353 | ||
354 | void line6_free_playback_buffer(struct snd_line6_pcm *line6pcm) | |
355 | { | |
356 | kfree(line6pcm->buffer_out); | |
357 | line6pcm->buffer_out = NULL; | |
358 | } | |
359 | ||
705ececd MG |
360 | /* |
361 | Callback for completed playback URB. | |
362 | */ | |
0c7ab158 | 363 | static void audio_out_callback(struct urb *urb) |
705ececd MG |
364 | { |
365 | int i, index, length = 0, shutdown = 0; | |
366 | unsigned long flags; | |
367 | ||
e1a164d7 | 368 | struct snd_line6_pcm *line6pcm = (struct snd_line6_pcm *)urb->context; |
45af4977 | 369 | struct snd_pcm_substream *substream = |
1027f476 MG |
370 | get_substream(line6pcm, SNDRV_PCM_STREAM_PLAYBACK); |
371 | ||
372 | #if USE_CLEAR_BUFFER_WORKAROUND | |
373 | memset(urb->transfer_buffer, 0, urb->transfer_buffer_length); | |
374 | #endif | |
375 | ||
376 | line6pcm->last_frame_out = urb->start_frame; | |
705ececd MG |
377 | |
378 | /* find index of URB */ | |
010f378e GKH |
379 | for (index = LINE6_ISO_BUFFERS; index--;) |
380 | if (urb == line6pcm->urb_audio_out[index]) | |
705ececd MG |
381 | break; |
382 | ||
010f378e | 383 | if (index < 0) |
45af4977 | 384 | return; /* URB has been unlinked asynchronously */ |
705ececd | 385 | |
010f378e | 386 | for (i = LINE6_ISO_PACKETS; i--;) |
705ececd MG |
387 | length += urb->iso_frame_desc[i].length; |
388 | ||
389 | spin_lock_irqsave(&line6pcm->lock_audio_out, flags); | |
705ececd | 390 | |
0ca54888 | 391 | if (test_bit(LINE6_INDEX_PCM_ALSA_PLAYBACK_STREAM, &line6pcm->flags)) { |
1027f476 MG |
392 | struct snd_pcm_runtime *runtime = substream->runtime; |
393 | line6pcm->pos_out_done += | |
394 | length / line6pcm->properties->bytes_per_frame; | |
395 | ||
396 | if (line6pcm->pos_out_done >= runtime->buffer_size) | |
397 | line6pcm->pos_out_done -= runtime->buffer_size; | |
398 | } | |
705ececd MG |
399 | |
400 | clear_bit(index, &line6pcm->active_urb_out); | |
401 | ||
010f378e | 402 | for (i = LINE6_ISO_PACKETS; i--;) |
e1a164d7 | 403 | if (urb->iso_frame_desc[i].status == -EXDEV) { |
705ececd MG |
404 | shutdown = 1; |
405 | break; | |
406 | } | |
407 | ||
1027f476 | 408 | if (test_and_clear_bit(index, &line6pcm->unlink_urb_out)) |
705ececd MG |
409 | shutdown = 1; |
410 | ||
411 | spin_unlock_irqrestore(&line6pcm->lock_audio_out, flags); | |
412 | ||
010f378e | 413 | if (!shutdown) { |
1027f476 | 414 | submit_audio_out_urb(line6pcm); |
705ececd | 415 | |
0ca54888 | 416 | if (test_bit(LINE6_INDEX_PCM_ALSA_PLAYBACK_STREAM, &line6pcm->flags)) { |
027360c5 GKH |
417 | line6pcm->bytes_out += length; |
418 | if (line6pcm->bytes_out >= line6pcm->period_out) { | |
1027f476 MG |
419 | line6pcm->bytes_out %= line6pcm->period_out; |
420 | snd_pcm_period_elapsed(substream); | |
421 | } | |
705ececd MG |
422 | } |
423 | } | |
424 | } | |
425 | ||
426 | /* open playback callback */ | |
427 | static int snd_line6_playback_open(struct snd_pcm_substream *substream) | |
428 | { | |
429 | int err; | |
430 | struct snd_pcm_runtime *runtime = substream->runtime; | |
431 | struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream); | |
432 | ||
010f378e | 433 | err = snd_pcm_hw_constraint_ratdens(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, |
e1a164d7 MG |
434 | (&line6pcm-> |
435 | properties->snd_line6_rates)); | |
010f378e | 436 | if (err < 0) |
705ececd MG |
437 | return err; |
438 | ||
439 | runtime->hw = line6pcm->properties->snd_line6_playback_hw; | |
440 | return 0; | |
441 | } | |
442 | ||
443 | /* close playback callback */ | |
444 | static int snd_line6_playback_close(struct snd_pcm_substream *substream) | |
445 | { | |
446 | return 0; | |
447 | } | |
448 | ||
449 | /* hw_params playback callback */ | |
45af4977 SB |
450 | static int snd_line6_playback_hw_params(struct snd_pcm_substream *substream, |
451 | struct snd_pcm_hw_params *hw_params) | |
705ececd MG |
452 | { |
453 | int ret; | |
454 | struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream); | |
455 | ||
456 | /* -- Florian Demski [FD] */ | |
457 | /* don't ask me why, but this fixes the bug on my machine */ | |
010f378e GKH |
458 | if (line6pcm == NULL) { |
459 | if (substream->pcm == NULL) | |
705ececd | 460 | return -ENOMEM; |
010f378e | 461 | if (substream->pcm->private_data == NULL) |
705ececd MG |
462 | return -ENOMEM; |
463 | substream->private_data = substream->pcm->private_data; | |
010f378e | 464 | line6pcm = snd_pcm_substream_chip(substream); |
705ececd MG |
465 | } |
466 | /* -- [FD] end */ | |
467 | ||
0ca54888 | 468 | ret = line6_pcm_acquire(line6pcm, LINE6_BIT_PCM_ALSA_PLAYBACK_BUFFER); |
140e28b8 | 469 | |
0ca54888 MG |
470 | if (ret < 0) |
471 | return ret; | |
140e28b8 | 472 | |
010f378e GKH |
473 | ret = snd_pcm_lib_malloc_pages(substream, |
474 | params_buffer_bytes(hw_params)); | |
0ca54888 MG |
475 | if (ret < 0) { |
476 | line6_pcm_release(line6pcm, LINE6_BIT_PCM_ALSA_PLAYBACK_BUFFER); | |
705ececd | 477 | return ret; |
0ca54888 | 478 | } |
705ececd MG |
479 | |
480 | line6pcm->period_out = params_period_bytes(hw_params); | |
705ececd MG |
481 | return 0; |
482 | } | |
483 | ||
484 | /* hw_free playback callback */ | |
485 | static int snd_line6_playback_hw_free(struct snd_pcm_substream *substream) | |
486 | { | |
140e28b8 | 487 | struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream); |
0ca54888 | 488 | line6_pcm_release(line6pcm, LINE6_BIT_PCM_ALSA_PLAYBACK_BUFFER); |
705ececd MG |
489 | return snd_pcm_lib_free_pages(substream); |
490 | } | |
491 | ||
492 | /* trigger playback callback */ | |
1027f476 | 493 | int snd_line6_playback_trigger(struct snd_line6_pcm *line6pcm, int cmd) |
705ececd | 494 | { |
705ececd | 495 | int err; |
705ececd | 496 | |
010f378e | 497 | switch (cmd) { |
705ececd | 498 | case SNDRV_PCM_TRIGGER_START: |
1027f476 MG |
499 | #ifdef CONFIG_PM |
500 | case SNDRV_PCM_TRIGGER_RESUME: | |
501 | #endif | |
0ca54888 | 502 | err = line6_pcm_acquire(line6pcm, LINE6_BIT_PCM_ALSA_PLAYBACK_STREAM); |
705ececd | 503 | |
1027f476 MG |
504 | if (err < 0) |
505 | return err; | |
705ececd MG |
506 | |
507 | break; | |
508 | ||
509 | case SNDRV_PCM_TRIGGER_STOP: | |
1027f476 MG |
510 | #ifdef CONFIG_PM |
511 | case SNDRV_PCM_TRIGGER_SUSPEND: | |
512 | #endif | |
0ca54888 | 513 | err = line6_pcm_release(line6pcm, LINE6_BIT_PCM_ALSA_PLAYBACK_STREAM); |
1027f476 MG |
514 | |
515 | if (err < 0) | |
516 | return err; | |
705ececd MG |
517 | |
518 | break; | |
519 | ||
520 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: | |
0ca54888 | 521 | set_bit(LINE6_INDEX_PAUSE_PLAYBACK, &line6pcm->flags); |
705ececd MG |
522 | break; |
523 | ||
524 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: | |
0ca54888 | 525 | clear_bit(LINE6_INDEX_PAUSE_PLAYBACK, &line6pcm->flags); |
705ececd MG |
526 | break; |
527 | ||
528 | default: | |
529 | return -EINVAL; | |
530 | } | |
531 | ||
532 | return 0; | |
533 | } | |
534 | ||
535 | /* playback pointer callback */ | |
536 | static snd_pcm_uframes_t | |
537 | snd_line6_playback_pointer(struct snd_pcm_substream *substream) | |
538 | { | |
539 | struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream); | |
540 | return line6pcm->pos_out_done; | |
541 | } | |
542 | ||
543 | /* playback operators */ | |
544 | struct snd_pcm_ops snd_line6_playback_ops = { | |
e1a164d7 MG |
545 | .open = snd_line6_playback_open, |
546 | .close = snd_line6_playback_close, | |
547 | .ioctl = snd_pcm_lib_ioctl, | |
548 | .hw_params = snd_line6_playback_hw_params, | |
549 | .hw_free = snd_line6_playback_hw_free, | |
550 | .prepare = snd_line6_prepare, | |
551 | .trigger = snd_line6_trigger, | |
552 | .pointer = snd_line6_playback_pointer, | |
705ececd MG |
553 | }; |
554 | ||
1027f476 | 555 | int line6_create_audio_out_urbs(struct snd_line6_pcm *line6pcm) |
705ececd MG |
556 | { |
557 | int i; | |
558 | ||
559 | /* create audio URBs and fill in constant values: */ | |
010f378e | 560 | for (i = 0; i < LINE6_ISO_BUFFERS; ++i) { |
705ececd MG |
561 | struct urb *urb; |
562 | ||
563 | /* URB for audio out: */ | |
45af4977 SB |
564 | urb = line6pcm->urb_audio_out[i] = |
565 | usb_alloc_urb(LINE6_ISO_PACKETS, GFP_KERNEL); | |
705ececd | 566 | |
010f378e | 567 | if (urb == NULL) { |
705ececd MG |
568 | dev_err(line6pcm->line6->ifcdev, "Out of memory\n"); |
569 | return -ENOMEM; | |
570 | } | |
571 | ||
572 | urb->dev = line6pcm->line6->usbdev; | |
45af4977 SB |
573 | urb->pipe = |
574 | usb_sndisocpipe(line6pcm->line6->usbdev, | |
e1a164d7 MG |
575 | line6pcm->ep_audio_write & |
576 | USB_ENDPOINT_NUMBER_MASK); | |
705ececd MG |
577 | urb->transfer_flags = URB_ISO_ASAP; |
578 | urb->start_frame = -1; | |
579 | urb->number_of_packets = LINE6_ISO_PACKETS; | |
580 | urb->interval = LINE6_ISO_INTERVAL; | |
581 | urb->error_count = 0; | |
582 | urb->complete = audio_out_callback; | |
583 | } | |
584 | ||
585 | return 0; | |
586 | } |