/drivers/staging/line6/pcm.c
C | 522 lines | 372 code | 86 blank | 64 comment | 45 complexity | a05c75cca623ba5cf5d962c5d13be9c2 MD5 | raw file
Possible License(s): GPL-2.0, LGPL-2.0, AGPL-1.0
1/*
2 * Line6 Linux USB driver - 0.9.1beta
3 *
4 * Copyright (C) 2004-2010 Markus Grabner (grabner@icg.tugraz.at)
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
12#include <linux/slab.h>
13#include <sound/core.h>
14#include <sound/control.h>
15#include <sound/pcm.h>
16#include <sound/pcm_params.h>
17
18#include "audio.h"
19#include "capture.h"
20#include "driver.h"
21#include "playback.h"
22#include "pod.h"
23
24#ifdef CONFIG_LINE6_USB_IMPULSE_RESPONSE
25
26static struct snd_line6_pcm *dev2pcm(struct device *dev)
27{
28 struct usb_interface *interface = to_usb_interface(dev);
29 struct usb_line6 *line6 = usb_get_intfdata(interface);
30 struct snd_line6_pcm *line6pcm = line6->line6pcm;
31 return line6pcm;
32}
33
34/*
35 "read" request on "impulse_volume" special file.
36*/
37static ssize_t pcm_get_impulse_volume(struct device *dev,
38 struct device_attribute *attr, char *buf)
39{
40 return sprintf(buf, "%d\n", dev2pcm(dev)->impulse_volume);
41}
42
43/*
44 "write" request on "impulse_volume" special file.
45*/
46static ssize_t pcm_set_impulse_volume(struct device *dev,
47 struct device_attribute *attr,
48 const char *buf, size_t count)
49{
50 struct snd_line6_pcm *line6pcm = dev2pcm(dev);
51 int value = simple_strtoul(buf, NULL, 10);
52 line6pcm->impulse_volume = value;
53
54 if (value > 0)
55 line6_pcm_start(line6pcm, MASK_PCM_IMPULSE);
56 else
57 line6_pcm_stop(line6pcm, MASK_PCM_IMPULSE);
58
59 return count;
60}
61
62/*
63 "read" request on "impulse_period" special file.
64*/
65static ssize_t pcm_get_impulse_period(struct device *dev,
66 struct device_attribute *attr, char *buf)
67{
68 return sprintf(buf, "%d\n", dev2pcm(dev)->impulse_period);
69}
70
71/*
72 "write" request on "impulse_period" special file.
73*/
74static ssize_t pcm_set_impulse_period(struct device *dev,
75 struct device_attribute *attr,
76 const char *buf, size_t count)
77{
78 dev2pcm(dev)->impulse_period = simple_strtoul(buf, NULL, 10);
79 return count;
80}
81
82static DEVICE_ATTR(impulse_volume, S_IWUSR | S_IRUGO, pcm_get_impulse_volume,
83 pcm_set_impulse_volume);
84static DEVICE_ATTR(impulse_period, S_IWUSR | S_IRUGO, pcm_get_impulse_period,
85 pcm_set_impulse_period);
86
87#endif
88
89int line6_pcm_start(struct snd_line6_pcm *line6pcm, int channels)
90{
91 unsigned long flags_old =
92 __sync_fetch_and_or(&line6pcm->flags, channels);
93 unsigned long flags_new = flags_old | channels;
94 int err = 0;
95
96#if LINE6_BACKUP_MONITOR_SIGNAL
97 if (!(line6pcm->line6->properties->capabilities & LINE6_BIT_HWMON)) {
98 line6pcm->prev_fbuf =
99 kmalloc(LINE6_ISO_PACKETS * line6pcm->max_packet_size,
100 GFP_KERNEL);
101
102 if (!line6pcm->prev_fbuf) {
103 dev_err(line6pcm->line6->ifcdev,
104 "cannot malloc monitor buffer\n");
105 return -ENOMEM;
106 }
107 }
108#else
109 line6pcm->prev_fbuf = NULL;
110#endif
111
112 if (((flags_old & MASK_CAPTURE) == 0) &&
113 ((flags_new & MASK_CAPTURE) != 0)) {
114 /*
115 Waiting for completion of active URBs in the stop handler is
116 a bug, we therefore report an error if capturing is restarted
117 too soon.
118 */
119 if (line6pcm->active_urb_in | line6pcm->unlink_urb_in)
120 return -EBUSY;
121
122 line6pcm->buffer_in =
123 kmalloc(LINE6_ISO_BUFFERS * LINE6_ISO_PACKETS *
124 line6pcm->max_packet_size, GFP_KERNEL);
125
126 if (!line6pcm->buffer_in) {
127 dev_err(line6pcm->line6->ifcdev,
128 "cannot malloc capture buffer\n");
129 return -ENOMEM;
130 }
131
132 line6pcm->count_in = 0;
133 line6pcm->prev_fsize = 0;
134 err = line6_submit_audio_in_all_urbs(line6pcm);
135
136 if (err < 0) {
137 __sync_fetch_and_and(&line6pcm->flags, ~channels);
138 return err;
139 }
140 }
141
142 if (((flags_old & MASK_PLAYBACK) == 0) &&
143 ((flags_new & MASK_PLAYBACK) != 0)) {
144 /*
145 See comment above regarding PCM restart.
146 */
147 if (line6pcm->active_urb_out | line6pcm->unlink_urb_out)
148 return -EBUSY;
149
150 line6pcm->buffer_out =
151 kmalloc(LINE6_ISO_BUFFERS * LINE6_ISO_PACKETS *
152 line6pcm->max_packet_size, GFP_KERNEL);
153
154 if (!line6pcm->buffer_out) {
155 dev_err(line6pcm->line6->ifcdev,
156 "cannot malloc playback buffer\n");
157 return -ENOMEM;
158 }
159
160 line6pcm->count_out = 0;
161 err = line6_submit_audio_out_all_urbs(line6pcm);
162
163 if (err < 0) {
164 __sync_fetch_and_and(&line6pcm->flags, ~channels);
165 return err;
166 }
167 }
168
169 return 0;
170}
171
172int line6_pcm_stop(struct snd_line6_pcm *line6pcm, int channels)
173{
174 unsigned long flags_old =
175 __sync_fetch_and_and(&line6pcm->flags, ~channels);
176 unsigned long flags_new = flags_old & ~channels;
177
178 if (((flags_old & MASK_CAPTURE) != 0) &&
179 ((flags_new & MASK_CAPTURE) == 0)) {
180 line6_unlink_audio_in_urbs(line6pcm);
181 kfree(line6pcm->buffer_in);
182 line6pcm->buffer_in = NULL;
183 }
184
185 if (((flags_old & MASK_PLAYBACK) != 0) &&
186 ((flags_new & MASK_PLAYBACK) == 0)) {
187 line6_unlink_audio_out_urbs(line6pcm);
188 kfree(line6pcm->buffer_out);
189 line6pcm->buffer_out = NULL;
190 }
191#if LINE6_BACKUP_MONITOR_SIGNAL
192 kfree(line6pcm->prev_fbuf);
193#endif
194
195 return 0;
196}
197
198/* trigger callback */
199int snd_line6_trigger(struct snd_pcm_substream *substream, int cmd)
200{
201 struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream);
202 struct snd_pcm_substream *s;
203 int err;
204 unsigned long flags;
205
206 spin_lock_irqsave(&line6pcm->lock_trigger, flags);
207 clear_bit(BIT_PREPARED, &line6pcm->flags);
208
209 snd_pcm_group_for_each_entry(s, substream) {
210 switch (s->stream) {
211 case SNDRV_PCM_STREAM_PLAYBACK:
212 err = snd_line6_playback_trigger(line6pcm, cmd);
213
214 if (err < 0) {
215 spin_unlock_irqrestore(&line6pcm->lock_trigger,
216 flags);
217 return err;
218 }
219
220 break;
221
222 case SNDRV_PCM_STREAM_CAPTURE:
223 err = snd_line6_capture_trigger(line6pcm, cmd);
224
225 if (err < 0) {
226 spin_unlock_irqrestore(&line6pcm->lock_trigger,
227 flags);
228 return err;
229 }
230
231 break;
232
233 default:
234 dev_err(line6pcm->line6->ifcdev,
235 "Unknown stream direction %d\n", s->stream);
236 }
237 }
238
239 spin_unlock_irqrestore(&line6pcm->lock_trigger, flags);
240 return 0;
241}
242
243/* control info callback */
244static int snd_line6_control_playback_info(struct snd_kcontrol *kcontrol,
245 struct snd_ctl_elem_info *uinfo)
246{
247 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
248 uinfo->count = 2;
249 uinfo->value.integer.min = 0;
250 uinfo->value.integer.max = 256;
251 return 0;
252}
253
254/* control get callback */
255static int snd_line6_control_playback_get(struct snd_kcontrol *kcontrol,
256 struct snd_ctl_elem_value *ucontrol)
257{
258 int i;
259 struct snd_line6_pcm *line6pcm = snd_kcontrol_chip(kcontrol);
260
261 for (i = 2; i--;)
262 ucontrol->value.integer.value[i] = line6pcm->volume_playback[i];
263
264 return 0;
265}
266
267/* control put callback */
268static int snd_line6_control_playback_put(struct snd_kcontrol *kcontrol,
269 struct snd_ctl_elem_value *ucontrol)
270{
271 int i, changed = 0;
272 struct snd_line6_pcm *line6pcm = snd_kcontrol_chip(kcontrol);
273
274 for (i = 2; i--;)
275 if (line6pcm->volume_playback[i] !=
276 ucontrol->value.integer.value[i]) {
277 line6pcm->volume_playback[i] =
278 ucontrol->value.integer.value[i];
279 changed = 1;
280 }
281
282 return changed;
283}
284
285/* control definition */
286static struct snd_kcontrol_new line6_control_playback = {
287 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
288 .name = "PCM Playback Volume",
289 .index = 0,
290 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
291 .info = snd_line6_control_playback_info,
292 .get = snd_line6_control_playback_get,
293 .put = snd_line6_control_playback_put
294};
295
296/*
297 Cleanup the PCM device.
298*/
299static void line6_cleanup_pcm(struct snd_pcm *pcm)
300{
301 int i;
302 struct snd_line6_pcm *line6pcm = snd_pcm_chip(pcm);
303
304#ifdef CONFIG_LINE6_USB_IMPULSE_RESPONSE
305 device_remove_file(line6pcm->line6->ifcdev, &dev_attr_impulse_volume);
306 device_remove_file(line6pcm->line6->ifcdev, &dev_attr_impulse_period);
307#endif
308
309 for (i = LINE6_ISO_BUFFERS; i--;) {
310 if (line6pcm->urb_audio_out[i]) {
311 usb_kill_urb(line6pcm->urb_audio_out[i]);
312 usb_free_urb(line6pcm->urb_audio_out[i]);
313 }
314 if (line6pcm->urb_audio_in[i]) {
315 usb_kill_urb(line6pcm->urb_audio_in[i]);
316 usb_free_urb(line6pcm->urb_audio_in[i]);
317 }
318 }
319}
320
321/* create a PCM device */
322static int snd_line6_new_pcm(struct snd_line6_pcm *line6pcm)
323{
324 struct snd_pcm *pcm;
325 int err;
326
327 err = snd_pcm_new(line6pcm->line6->card,
328 (char *)line6pcm->line6->properties->name,
329 0, 1, 1, &pcm);
330 if (err < 0)
331 return err;
332
333 pcm->private_data = line6pcm;
334 pcm->private_free = line6_cleanup_pcm;
335 line6pcm->pcm = pcm;
336 strcpy(pcm->name, line6pcm->line6->properties->name);
337
338 /* set operators */
339 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
340 &snd_line6_playback_ops);
341 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_line6_capture_ops);
342
343 /* pre-allocation of buffers */
344 snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS,
345 snd_dma_continuous_data
346 (GFP_KERNEL), 64 * 1024,
347 128 * 1024);
348
349 return 0;
350}
351
352/* PCM device destructor */
353static int snd_line6_pcm_free(struct snd_device *device)
354{
355 return 0;
356}
357
358/*
359 Stop substream if still running.
360*/
361static void pcm_disconnect_substream(struct snd_pcm_substream *substream)
362{
363 if (substream->runtime && snd_pcm_running(substream))
364 snd_pcm_stop(substream, SNDRV_PCM_STATE_DISCONNECTED);
365}
366
367/*
368 Stop PCM stream.
369*/
370void line6_pcm_disconnect(struct snd_line6_pcm *line6pcm)
371{
372 pcm_disconnect_substream(get_substream
373 (line6pcm, SNDRV_PCM_STREAM_CAPTURE));
374 pcm_disconnect_substream(get_substream
375 (line6pcm, SNDRV_PCM_STREAM_PLAYBACK));
376 line6_unlink_wait_clear_audio_out_urbs(line6pcm);
377 line6_unlink_wait_clear_audio_in_urbs(line6pcm);
378}
379
380/*
381 Create and register the PCM device and mixer entries.
382 Create URBs for playback and capture.
383*/
384int line6_init_pcm(struct usb_line6 *line6,
385 struct line6_pcm_properties *properties)
386{
387 static struct snd_device_ops pcm_ops = {
388 .dev_free = snd_line6_pcm_free,
389 };
390
391 int err;
392 int ep_read = 0, ep_write = 0;
393 struct snd_line6_pcm *line6pcm;
394
395 if (!(line6->properties->capabilities & LINE6_BIT_PCM))
396 return 0; /* skip PCM initialization and report success */
397
398 /* initialize PCM subsystem based on product id: */
399 switch (line6->product) {
400 case LINE6_DEVID_BASSPODXT:
401 case LINE6_DEVID_BASSPODXTLIVE:
402 case LINE6_DEVID_BASSPODXTPRO:
403 case LINE6_DEVID_PODXT:
404 case LINE6_DEVID_PODXTLIVE:
405 case LINE6_DEVID_PODXTPRO:
406 ep_read = 0x82;
407 ep_write = 0x01;
408 break;
409
410 case LINE6_DEVID_PODX3:
411 case LINE6_DEVID_PODX3LIVE:
412 ep_read = 0x86;
413 ep_write = 0x02;
414 break;
415
416 case LINE6_DEVID_POCKETPOD:
417 ep_read = 0x82;
418 ep_write = 0x02;
419 break;
420
421 case LINE6_DEVID_GUITARPORT:
422 case LINE6_DEVID_PODSTUDIO_GX:
423 case LINE6_DEVID_PODSTUDIO_UX1:
424 case LINE6_DEVID_PODSTUDIO_UX2:
425 case LINE6_DEVID_TONEPORT_GX:
426 case LINE6_DEVID_TONEPORT_UX1:
427 case LINE6_DEVID_TONEPORT_UX2:
428 ep_read = 0x82;
429 ep_write = 0x01;
430 break;
431
432 /* this is for interface_number == 1:
433 case LINE6_DEVID_TONEPORT_UX2:
434 case LINE6_DEVID_PODSTUDIO_UX2:
435 ep_read = 0x87;
436 ep_write = 0x00;
437 break;
438 */
439
440 default:
441 MISSING_CASE;
442 }
443
444 line6pcm = kzalloc(sizeof(struct snd_line6_pcm), GFP_KERNEL);
445
446 if (line6pcm == NULL)
447 return -ENOMEM;
448
449 line6pcm->volume_playback[0] = line6pcm->volume_playback[1] = 255;
450 line6pcm->volume_monitor = 255;
451 line6pcm->line6 = line6;
452 line6pcm->ep_audio_read = ep_read;
453 line6pcm->ep_audio_write = ep_write;
454 line6pcm->max_packet_size = usb_maxpacket(line6->usbdev,
455 usb_rcvintpipe(line6->usbdev,
456 ep_read), 0);
457 line6pcm->properties = properties;
458 line6->line6pcm = line6pcm;
459
460 /* PCM device: */
461 err = snd_device_new(line6->card, SNDRV_DEV_PCM, line6, &pcm_ops);
462 if (err < 0)
463 return err;
464
465 snd_card_set_dev(line6->card, line6->ifcdev);
466
467 err = snd_line6_new_pcm(line6pcm);
468 if (err < 0)
469 return err;
470
471 spin_lock_init(&line6pcm->lock_audio_out);
472 spin_lock_init(&line6pcm->lock_audio_in);
473 spin_lock_init(&line6pcm->lock_trigger);
474
475 err = line6_create_audio_out_urbs(line6pcm);
476 if (err < 0)
477 return err;
478
479 err = line6_create_audio_in_urbs(line6pcm);
480 if (err < 0)
481 return err;
482
483 /* mixer: */
484 err =
485 snd_ctl_add(line6->card,
486 snd_ctl_new1(&line6_control_playback, line6pcm));
487 if (err < 0)
488 return err;
489
490#ifdef CONFIG_LINE6_USB_IMPULSE_RESPONSE
491 /* impulse response test: */
492 err = device_create_file(line6->ifcdev, &dev_attr_impulse_volume);
493 if (err < 0)
494 return err;
495
496 err = device_create_file(line6->ifcdev, &dev_attr_impulse_period);
497 if (err < 0)
498 return err;
499
500 line6pcm->impulse_period = LINE6_IMPULSE_DEFAULT_PERIOD;
501#endif
502
503 return 0;
504}
505
506/* prepare pcm callback */
507int snd_line6_prepare(struct snd_pcm_substream *substream)
508{
509 struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream);
510
511 if (!test_and_set_bit(BIT_PREPARED, &line6pcm->flags)) {
512 line6pcm->count_out = 0;
513 line6pcm->pos_out = 0;
514 line6pcm->pos_out_done = 0;
515 line6pcm->bytes_out = 0;
516 line6pcm->count_in = 0;
517 line6pcm->pos_in_done = 0;
518 line6pcm->bytes_in = 0;
519 }
520
521 return 0;
522}