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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 impulse_volume_show(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 impulse_volume_store(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;
52 int ret;
53
54 ret = kstrtoint(buf, 10, &value);
55 if (ret < 0)
56 return ret;
57
58 line6pcm->impulse_volume = value;
59
60 if (value > 0)
61 line6_pcm_acquire(line6pcm, LINE6_BITS_PCM_IMPULSE);
62 else
63 line6_pcm_release(line6pcm, LINE6_BITS_PCM_IMPULSE);
64
65 return count;
66}
67static DEVICE_ATTR_RW(impulse_volume);
68
69/*
70 "read" request on "impulse_period" special file.
71*/
72static ssize_t impulse_period_show(struct device *dev,
73 struct device_attribute *attr, char *buf)
74{
75 return sprintf(buf, "%d\n", dev2pcm(dev)->impulse_period);
76}
77
78/*
79 "write" request on "impulse_period" special file.
80*/
81static ssize_t impulse_period_store(struct device *dev,
82 struct device_attribute *attr,
83 const char *buf, size_t count)
84{
85 int value;
86 int ret;
87
88 ret = kstrtoint(buf, 10, &value);
89 if (ret < 0)
90 return ret;
91
92 dev2pcm(dev)->impulse_period = value;
93 return count;
94}
95static DEVICE_ATTR_RW(impulse_period);
96
97#endif
98
99static bool test_flags(unsigned long flags0, unsigned long flags1,
100 unsigned long mask)
101{
102 return ((flags0 & mask) == 0) && ((flags1 & mask) != 0);
103}
104
105int line6_pcm_acquire(struct snd_line6_pcm *line6pcm, int channels)
106{
107 unsigned long flags_old, flags_new, flags_final;
108 int err;
109
110 do {
111 flags_old = ACCESS_ONCE(line6pcm->flags);
112 flags_new = flags_old | channels;
113 } while (cmpxchg(&line6pcm->flags, flags_old, flags_new) != flags_old);
114
115 flags_final = flags_old;
116
117 line6pcm->prev_fbuf = NULL;
118
119 if (test_flags(flags_old, flags_new, LINE6_BITS_CAPTURE_BUFFER)) {
120 /* Invoked multiple times in a row so allocate once only */
121 if (!line6pcm->buffer_in) {
122 line6pcm->buffer_in =
123 kmalloc(LINE6_ISO_BUFFERS * LINE6_ISO_PACKETS *
124 line6pcm->max_packet_size, GFP_KERNEL);
125 if (!line6pcm->buffer_in) {
126 err = -ENOMEM;
127 goto pcm_acquire_error;
128 }
129
130 flags_final |= channels & LINE6_BITS_CAPTURE_BUFFER;
131 }
132 }
133
134 if (test_flags(flags_old, flags_new, LINE6_BITS_CAPTURE_STREAM)) {
135 /*
136 Waiting for completion of active URBs in the stop handler is
137 a bug, we therefore report an error if capturing is restarted
138 too soon.
139 */
140 if (line6pcm->active_urb_in | line6pcm->unlink_urb_in) {
141 dev_err(line6pcm->line6->ifcdev, "Device not yet ready\n");
142 return -EBUSY;
143 }
144
145 line6pcm->count_in = 0;
146 line6pcm->prev_fsize = 0;
147 err = line6_submit_audio_in_all_urbs(line6pcm);
148
149 if (err < 0)
150 goto pcm_acquire_error;
151
152 flags_final |= channels & LINE6_BITS_CAPTURE_STREAM;
153 }
154
155 if (test_flags(flags_old, flags_new, LINE6_BITS_PLAYBACK_BUFFER)) {
156 /* Invoked multiple times in a row so allocate once only */
157 if (!line6pcm->buffer_out) {
158 line6pcm->buffer_out =
159 kmalloc(LINE6_ISO_BUFFERS * LINE6_ISO_PACKETS *
160 line6pcm->max_packet_size, GFP_KERNEL);
161 if (!line6pcm->buffer_out) {
162 err = -ENOMEM;
163 goto pcm_acquire_error;
164 }
165
166 flags_final |= channels & LINE6_BITS_PLAYBACK_BUFFER;
167 }
168 }
169
170 if (test_flags(flags_old, flags_new, LINE6_BITS_PLAYBACK_STREAM)) {
171 /*
172 See comment above regarding PCM restart.
173 */
174 if (line6pcm->active_urb_out | line6pcm->unlink_urb_out) {
175 dev_err(line6pcm->line6->ifcdev, "Device not yet ready\n");
176 return -EBUSY;
177 }
178
179 line6pcm->count_out = 0;
180 err = line6_submit_audio_out_all_urbs(line6pcm);
181
182 if (err < 0)
183 goto pcm_acquire_error;
184
185 flags_final |= channels & LINE6_BITS_PLAYBACK_STREAM;
186 }
187
188 return 0;
189
190pcm_acquire_error:
191 /*
192 If not all requested resources/streams could be obtained, release
193 those which were successfully obtained (if any).
194 */
195 line6_pcm_release(line6pcm, flags_final & channels);
196 return err;
197}
198
199int line6_pcm_release(struct snd_line6_pcm *line6pcm, int channels)
200{
201 unsigned long flags_old, flags_new;
202
203 do {
204 flags_old = ACCESS_ONCE(line6pcm->flags);
205 flags_new = flags_old & ~channels;
206 } while (cmpxchg(&line6pcm->flags, flags_old, flags_new) != flags_old);
207
208 if (test_flags(flags_new, flags_old, LINE6_BITS_CAPTURE_STREAM))
209 line6_unlink_audio_in_urbs(line6pcm);
210
211 if (test_flags(flags_new, flags_old, LINE6_BITS_CAPTURE_BUFFER)) {
212 line6_wait_clear_audio_in_urbs(line6pcm);
213 line6_free_capture_buffer(line6pcm);
214 }
215
216 if (test_flags(flags_new, flags_old, LINE6_BITS_PLAYBACK_STREAM))
217 line6_unlink_audio_out_urbs(line6pcm);
218
219 if (test_flags(flags_new, flags_old, LINE6_BITS_PLAYBACK_BUFFER)) {
220 line6_wait_clear_audio_out_urbs(line6pcm);
221 line6_free_playback_buffer(line6pcm);
222 }
223
224 return 0;
225}
226
227/* trigger callback */
228int snd_line6_trigger(struct snd_pcm_substream *substream, int cmd)
229{
230 struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream);
231 struct snd_pcm_substream *s;
232 int err;
233 unsigned long flags;
234
235 spin_lock_irqsave(&line6pcm->lock_trigger, flags);
236 clear_bit(LINE6_INDEX_PREPARED, &line6pcm->flags);
237
238 snd_pcm_group_for_each_entry(s, substream) {
239 switch (s->stream) {
240 case SNDRV_PCM_STREAM_PLAYBACK:
241 err = snd_line6_playback_trigger(line6pcm, cmd);
242
243 if (err < 0) {
244 spin_unlock_irqrestore(&line6pcm->lock_trigger,
245 flags);
246 return err;
247 }
248
249 break;
250
251 case SNDRV_PCM_STREAM_CAPTURE:
252 err = snd_line6_capture_trigger(line6pcm, cmd);
253
254 if (err < 0) {
255 spin_unlock_irqrestore(&line6pcm->lock_trigger,
256 flags);
257 return err;
258 }
259
260 break;
261
262 default:
263 dev_err(line6pcm->line6->ifcdev,
264 "Unknown stream direction %d\n", s->stream);
265 }
266 }
267
268 spin_unlock_irqrestore(&line6pcm->lock_trigger, flags);
269 return 0;
270}
271
272/* control info callback */
273static int snd_line6_control_playback_info(struct snd_kcontrol *kcontrol,
274 struct snd_ctl_elem_info *uinfo)
275{
276 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
277 uinfo->count = 2;
278 uinfo->value.integer.min = 0;
279 uinfo->value.integer.max = 256;
280 return 0;
281}
282
283/* control get callback */
284static int snd_line6_control_playback_get(struct snd_kcontrol *kcontrol,
285 struct snd_ctl_elem_value *ucontrol)
286{
287 int i;
288 struct snd_line6_pcm *line6pcm = snd_kcontrol_chip(kcontrol);
289
290 for (i = 2; i--;)
291 ucontrol->value.integer.value[i] = line6pcm->volume_playback[i];
292
293 return 0;
294}
295
296/* control put callback */
297static int snd_line6_control_playback_put(struct snd_kcontrol *kcontrol,
298 struct snd_ctl_elem_value *ucontrol)
299{
300 int i, changed = 0;
301 struct snd_line6_pcm *line6pcm = snd_kcontrol_chip(kcontrol);
302
303 for (i = 2; i--;)
304 if (line6pcm->volume_playback[i] !=
305 ucontrol->value.integer.value[i]) {
306 line6pcm->volume_playback[i] =
307 ucontrol->value.integer.value[i];
308 changed = 1;
309 }
310
311 return changed;
312}
313
314/* control definition */
315static struct snd_kcontrol_new line6_control_playback = {
316 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
317 .name = "PCM Playback Volume",
318 .index = 0,
319 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
320 .info = snd_line6_control_playback_info,
321 .get = snd_line6_control_playback_get,
322 .put = snd_line6_control_playback_put
323};
324
325/*
326 Cleanup the PCM device.
327*/
328static void line6_cleanup_pcm(struct snd_pcm *pcm)
329{
330 int i;
331 struct snd_line6_pcm *line6pcm = snd_pcm_chip(pcm);
332
333#ifdef CONFIG_LINE6_USB_IMPULSE_RESPONSE
334 device_remove_file(line6pcm->line6->ifcdev, &dev_attr_impulse_volume);
335 device_remove_file(line6pcm->line6->ifcdev, &dev_attr_impulse_period);
336#endif
337
338 for (i = LINE6_ISO_BUFFERS; i--;) {
339 if (line6pcm->urb_audio_out[i]) {
340 usb_kill_urb(line6pcm->urb_audio_out[i]);
341 usb_free_urb(line6pcm->urb_audio_out[i]);
342 }
343 if (line6pcm->urb_audio_in[i]) {
344 usb_kill_urb(line6pcm->urb_audio_in[i]);
345 usb_free_urb(line6pcm->urb_audio_in[i]);
346 }
347 }
348}
349
350/* create a PCM device */
351static int snd_line6_new_pcm(struct snd_line6_pcm *line6pcm)
352{
353 struct snd_pcm *pcm;
354 int err;
355
356 err = snd_pcm_new(line6pcm->line6->card,
357 (char *)line6pcm->line6->properties->name,
358 0, 1, 1, &pcm);
359 if (err < 0)
360 return err;
361
362 pcm->private_data = line6pcm;
363 pcm->private_free = line6_cleanup_pcm;
364 line6pcm->pcm = pcm;
365 strcpy(pcm->name, line6pcm->line6->properties->name);
366
367 /* set operators */
368 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
369 &snd_line6_playback_ops);
370 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_line6_capture_ops);
371
372 /* pre-allocation of buffers */
373 snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS,
374 snd_dma_continuous_data
375 (GFP_KERNEL), 64 * 1024,
376 128 * 1024);
377
378 return 0;
379}
380
381/* PCM device destructor */
382static int snd_line6_pcm_free(struct snd_device *device)
383{
384 return 0;
385}
386
387/*
388 Stop substream if still running.
389*/
390static void pcm_disconnect_substream(struct snd_pcm_substream *substream)
391{
392 if (substream->runtime && snd_pcm_running(substream)) {
393 snd_pcm_stream_lock_irq(substream);
394 snd_pcm_stop(substream, SNDRV_PCM_STATE_DISCONNECTED);
395 snd_pcm_stream_unlock_irq(substream);
396 }
397}
398
399/*
400 Stop PCM stream.
401*/
402void line6_pcm_disconnect(struct snd_line6_pcm *line6pcm)
403{
404 pcm_disconnect_substream(get_substream
405 (line6pcm, SNDRV_PCM_STREAM_CAPTURE));
406 pcm_disconnect_substream(get_substream
407 (line6pcm, SNDRV_PCM_STREAM_PLAYBACK));
408 line6_unlink_wait_clear_audio_out_urbs(line6pcm);
409 line6_unlink_wait_clear_audio_in_urbs(line6pcm);
410}
411
412/*
413 Create and register the PCM device and mixer entries.
414 Create URBs for playback and capture.
415*/
416int line6_init_pcm(struct usb_line6 *line6,
417 struct line6_pcm_properties *properties)
418{
419 static struct snd_device_ops pcm_ops = {
420 .dev_free = snd_line6_pcm_free,
421 };
422
423 int err;
424 int ep_read = 0, ep_write = 0;
425 struct snd_line6_pcm *line6pcm;
426
427 if (!(line6->properties->capabilities & LINE6_BIT_PCM))
428 return 0; /* skip PCM initialization and report success */
429
430 /* initialize PCM subsystem based on product id: */
431 switch (line6->product) {
432 case LINE6_DEVID_BASSPODXT:
433 case LINE6_DEVID_BASSPODXTLIVE:
434 case LINE6_DEVID_BASSPODXTPRO:
435 case LINE6_DEVID_PODXT:
436 case LINE6_DEVID_PODXTLIVE:
437 case LINE6_DEVID_PODXTPRO:
438 case LINE6_DEVID_PODHD300:
439 case LINE6_DEVID_PODHD400:
440 ep_read = 0x82;
441 ep_write = 0x01;
442 break;
443
444 case LINE6_DEVID_PODHD500:
445 case LINE6_DEVID_PODX3:
446 case LINE6_DEVID_PODX3LIVE:
447 ep_read = 0x86;
448 ep_write = 0x02;
449 break;
450
451 case LINE6_DEVID_POCKETPOD:
452 ep_read = 0x82;
453 ep_write = 0x02;
454 break;
455
456 case LINE6_DEVID_GUITARPORT:
457 case LINE6_DEVID_PODSTUDIO_GX:
458 case LINE6_DEVID_PODSTUDIO_UX1:
459 case LINE6_DEVID_PODSTUDIO_UX2:
460 case LINE6_DEVID_TONEPORT_GX:
461 case LINE6_DEVID_TONEPORT_UX1:
462 case LINE6_DEVID_TONEPORT_UX2:
463 ep_read = 0x82;
464 ep_write = 0x01;
465 break;
466
467 /* this is for interface_number == 1:
468 case LINE6_DEVID_TONEPORT_UX2:
469 case LINE6_DEVID_PODSTUDIO_UX2:
470 ep_read = 0x87;
471 ep_write = 0x00;
472 break; */
473
474 default:
475 MISSING_CASE;
476 }
477
478 line6pcm = kzalloc(sizeof(struct snd_line6_pcm), GFP_KERNEL);
479
480 if (line6pcm == NULL)
481 return -ENOMEM;
482
483 line6pcm->volume_playback[0] = line6pcm->volume_playback[1] = 255;
484 line6pcm->volume_monitor = 255;
485 line6pcm->line6 = line6;
486 line6pcm->ep_audio_read = ep_read;
487 line6pcm->ep_audio_write = ep_write;
488
489 /* Read and write buffers are sized identically, so choose minimum */
490 line6pcm->max_packet_size = min(
491 usb_maxpacket(line6->usbdev,
492 usb_rcvisocpipe(line6->usbdev, ep_read), 0),
493 usb_maxpacket(line6->usbdev,
494 usb_sndisocpipe(line6->usbdev, ep_write), 1));
495
496 line6pcm->properties = properties;
497 line6->line6pcm = line6pcm;
498
499 /* PCM device: */
500 err = snd_device_new(line6->card, SNDRV_DEV_PCM, line6, &pcm_ops);
501 if (err < 0)
502 return err;
503
504 err = snd_line6_new_pcm(line6pcm);
505 if (err < 0)
506 return err;
507
508 spin_lock_init(&line6pcm->lock_audio_out);
509 spin_lock_init(&line6pcm->lock_audio_in);
510 spin_lock_init(&line6pcm->lock_trigger);
511
512 err = line6_create_audio_out_urbs(line6pcm);
513 if (err < 0)
514 return err;
515
516 err = line6_create_audio_in_urbs(line6pcm);
517 if (err < 0)
518 return err;
519
520 /* mixer: */
521 err =
522 snd_ctl_add(line6->card,
523 snd_ctl_new1(&line6_control_playback, line6pcm));
524 if (err < 0)
525 return err;
526
527#ifdef CONFIG_LINE6_USB_IMPULSE_RESPONSE
528 /* impulse response test: */
529 err = device_create_file(line6->ifcdev, &dev_attr_impulse_volume);
530 if (err < 0)
531 return err;
532
533 err = device_create_file(line6->ifcdev, &dev_attr_impulse_period);
534 if (err < 0)
535 return err;
536
537 line6pcm->impulse_period = LINE6_IMPULSE_DEFAULT_PERIOD;
538#endif
539
540 return 0;
541}
542
543/* prepare pcm callback */
544int snd_line6_prepare(struct snd_pcm_substream *substream)
545{
546 struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream);
547
548 switch (substream->stream) {
549 case SNDRV_PCM_STREAM_PLAYBACK:
550 if ((line6pcm->flags & LINE6_BITS_PLAYBACK_STREAM) == 0)
551 line6_unlink_wait_clear_audio_out_urbs(line6pcm);
552
553 break;
554
555 case SNDRV_PCM_STREAM_CAPTURE:
556 if ((line6pcm->flags & LINE6_BITS_CAPTURE_STREAM) == 0)
557 line6_unlink_wait_clear_audio_in_urbs(line6pcm);
558
559 break;
560
561 default:
562 MISSING_CASE;
563 }
564
565 if (!test_and_set_bit(LINE6_INDEX_PREPARED, &line6pcm->flags)) {
566 line6pcm->count_out = 0;
567 line6pcm->pos_out = 0;
568 line6pcm->pos_out_done = 0;
569 line6pcm->bytes_out = 0;
570 line6pcm->count_in = 0;
571 line6pcm->pos_in_done = 0;
572 line6pcm->bytes_in = 0;
573 }
574
575 return 0;
576}