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
dev2pcm(struct device * dev)26 static 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 */
pcm_get_impulse_volume(struct device * dev,struct device_attribute * attr,char * buf)37 static 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 */
pcm_set_impulse_volume(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)46 static 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 */
pcm_get_impulse_period(struct device * dev,struct device_attribute * attr,char * buf)65 static 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 */
pcm_set_impulse_period(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)74 static 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
82 static DEVICE_ATTR(impulse_volume, S_IWUSR | S_IRUGO, pcm_get_impulse_volume,
83 pcm_set_impulse_volume);
84 static DEVICE_ATTR(impulse_period, S_IWUSR | S_IRUGO, pcm_get_impulse_period,
85 pcm_set_impulse_period);
86
87 #endif
88
test_flags(unsigned long flags0,unsigned long flags1,unsigned long mask)89 static bool test_flags(unsigned long flags0, unsigned long flags1,
90 unsigned long mask)
91 {
92 return ((flags0 & mask) == 0) && ((flags1 & mask) != 0);
93 }
94
line6_pcm_start(struct snd_line6_pcm * line6pcm,int channels)95 int line6_pcm_start(struct snd_line6_pcm *line6pcm, int channels)
96 {
97 unsigned long flags_old =
98 __sync_fetch_and_or(&line6pcm->flags, channels);
99 unsigned long flags_new = flags_old | channels;
100 int err = 0;
101
102 line6pcm->prev_fbuf = NULL;
103
104 if (test_flags(flags_old, flags_new, MASK_CAPTURE)) {
105 /*
106 Waiting for completion of active URBs in the stop handler is
107 a bug, we therefore report an error if capturing is restarted
108 too soon.
109 */
110 if (line6pcm->active_urb_in | line6pcm->unlink_urb_in)
111 return -EBUSY;
112
113 if (!(flags_new & MASK_PCM_ALSA_CAPTURE)) {
114 err = line6_alloc_capture_buffer(line6pcm);
115
116 if (err < 0)
117 goto pcm_start_error;
118 }
119
120 line6pcm->count_in = 0;
121 line6pcm->prev_fsize = 0;
122 err = line6_submit_audio_in_all_urbs(line6pcm);
123
124 if (err < 0)
125 goto pcm_start_error;
126 }
127
128 if (test_flags(flags_old, flags_new, MASK_PLAYBACK)) {
129 /*
130 See comment above regarding PCM restart.
131 */
132 if (line6pcm->active_urb_out | line6pcm->unlink_urb_out)
133 return -EBUSY;
134
135 if (!(flags_new & MASK_PCM_ALSA_PLAYBACK)) {
136 err = line6_alloc_playback_buffer(line6pcm);
137
138 if (err < 0)
139 goto pcm_start_error;
140 }
141
142 line6pcm->count_out = 0;
143 err = line6_submit_audio_out_all_urbs(line6pcm);
144
145 if (err < 0)
146 goto pcm_start_error;
147 }
148
149 return 0;
150
151 pcm_start_error:
152 __sync_fetch_and_and(&line6pcm->flags, ~channels);
153 return err;
154 }
155
line6_pcm_stop(struct snd_line6_pcm * line6pcm,int channels)156 int line6_pcm_stop(struct snd_line6_pcm *line6pcm, int channels)
157 {
158 unsigned long flags_old =
159 __sync_fetch_and_and(&line6pcm->flags, ~channels);
160 unsigned long flags_new = flags_old & ~channels;
161
162 if (test_flags(flags_new, flags_old, MASK_CAPTURE)) {
163 line6_unlink_audio_in_urbs(line6pcm);
164
165 if (!(flags_old & MASK_PCM_ALSA_CAPTURE))
166 line6_free_capture_buffer(line6pcm);
167 }
168
169 if (test_flags(flags_new, flags_old, MASK_PLAYBACK)) {
170 line6_unlink_audio_out_urbs(line6pcm);
171
172 if (!(flags_old & MASK_PCM_ALSA_PLAYBACK))
173 line6_free_playback_buffer(line6pcm);
174 }
175
176 return 0;
177 }
178
179 /* trigger callback */
snd_line6_trigger(struct snd_pcm_substream * substream,int cmd)180 int snd_line6_trigger(struct snd_pcm_substream *substream, int cmd)
181 {
182 struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream);
183 struct snd_pcm_substream *s;
184 int err;
185 unsigned long flags;
186
187 spin_lock_irqsave(&line6pcm->lock_trigger, flags);
188 clear_bit(BIT_PREPARED, &line6pcm->flags);
189
190 snd_pcm_group_for_each_entry(s, substream) {
191 switch (s->stream) {
192 case SNDRV_PCM_STREAM_PLAYBACK:
193 err = snd_line6_playback_trigger(line6pcm, cmd);
194
195 if (err < 0) {
196 spin_unlock_irqrestore(&line6pcm->lock_trigger,
197 flags);
198 return err;
199 }
200
201 break;
202
203 case SNDRV_PCM_STREAM_CAPTURE:
204 err = snd_line6_capture_trigger(line6pcm, cmd);
205
206 if (err < 0) {
207 spin_unlock_irqrestore(&line6pcm->lock_trigger,
208 flags);
209 return err;
210 }
211
212 break;
213
214 default:
215 dev_err(line6pcm->line6->ifcdev,
216 "Unknown stream direction %d\n", s->stream);
217 }
218 }
219
220 spin_unlock_irqrestore(&line6pcm->lock_trigger, flags);
221 return 0;
222 }
223
224 /* control info callback */
snd_line6_control_playback_info(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_info * uinfo)225 static int snd_line6_control_playback_info(struct snd_kcontrol *kcontrol,
226 struct snd_ctl_elem_info *uinfo)
227 {
228 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
229 uinfo->count = 2;
230 uinfo->value.integer.min = 0;
231 uinfo->value.integer.max = 256;
232 return 0;
233 }
234
235 /* control get callback */
snd_line6_control_playback_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)236 static int snd_line6_control_playback_get(struct snd_kcontrol *kcontrol,
237 struct snd_ctl_elem_value *ucontrol)
238 {
239 int i;
240 struct snd_line6_pcm *line6pcm = snd_kcontrol_chip(kcontrol);
241
242 for (i = 2; i--;)
243 ucontrol->value.integer.value[i] = line6pcm->volume_playback[i];
244
245 return 0;
246 }
247
248 /* control put callback */
snd_line6_control_playback_put(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)249 static int snd_line6_control_playback_put(struct snd_kcontrol *kcontrol,
250 struct snd_ctl_elem_value *ucontrol)
251 {
252 int i, changed = 0;
253 struct snd_line6_pcm *line6pcm = snd_kcontrol_chip(kcontrol);
254
255 for (i = 2; i--;)
256 if (line6pcm->volume_playback[i] !=
257 ucontrol->value.integer.value[i]) {
258 line6pcm->volume_playback[i] =
259 ucontrol->value.integer.value[i];
260 changed = 1;
261 }
262
263 return changed;
264 }
265
266 /* control definition */
267 static struct snd_kcontrol_new line6_control_playback = {
268 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
269 .name = "PCM Playback Volume",
270 .index = 0,
271 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
272 .info = snd_line6_control_playback_info,
273 .get = snd_line6_control_playback_get,
274 .put = snd_line6_control_playback_put
275 };
276
277 /*
278 Cleanup the PCM device.
279 */
line6_cleanup_pcm(struct snd_pcm * pcm)280 static void line6_cleanup_pcm(struct snd_pcm *pcm)
281 {
282 int i;
283 struct snd_line6_pcm *line6pcm = snd_pcm_chip(pcm);
284
285 #ifdef CONFIG_LINE6_USB_IMPULSE_RESPONSE
286 device_remove_file(line6pcm->line6->ifcdev, &dev_attr_impulse_volume);
287 device_remove_file(line6pcm->line6->ifcdev, &dev_attr_impulse_period);
288 #endif
289
290 for (i = LINE6_ISO_BUFFERS; i--;) {
291 if (line6pcm->urb_audio_out[i]) {
292 usb_kill_urb(line6pcm->urb_audio_out[i]);
293 usb_free_urb(line6pcm->urb_audio_out[i]);
294 }
295 if (line6pcm->urb_audio_in[i]) {
296 usb_kill_urb(line6pcm->urb_audio_in[i]);
297 usb_free_urb(line6pcm->urb_audio_in[i]);
298 }
299 }
300 }
301
302 /* create a PCM device */
snd_line6_new_pcm(struct snd_line6_pcm * line6pcm)303 static int snd_line6_new_pcm(struct snd_line6_pcm *line6pcm)
304 {
305 struct snd_pcm *pcm;
306 int err;
307
308 err = snd_pcm_new(line6pcm->line6->card,
309 (char *)line6pcm->line6->properties->name,
310 0, 1, 1, &pcm);
311 if (err < 0)
312 return err;
313
314 pcm->private_data = line6pcm;
315 pcm->private_free = line6_cleanup_pcm;
316 line6pcm->pcm = pcm;
317 strcpy(pcm->name, line6pcm->line6->properties->name);
318
319 /* set operators */
320 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
321 &snd_line6_playback_ops);
322 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_line6_capture_ops);
323
324 /* pre-allocation of buffers */
325 snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS,
326 snd_dma_continuous_data
327 (GFP_KERNEL), 64 * 1024,
328 128 * 1024);
329
330 return 0;
331 }
332
333 /* PCM device destructor */
snd_line6_pcm_free(struct snd_device * device)334 static int snd_line6_pcm_free(struct snd_device *device)
335 {
336 return 0;
337 }
338
339 /*
340 Stop substream if still running.
341 */
pcm_disconnect_substream(struct snd_pcm_substream * substream)342 static void pcm_disconnect_substream(struct snd_pcm_substream *substream)
343 {
344 if (substream->runtime && snd_pcm_running(substream))
345 snd_pcm_stop(substream, SNDRV_PCM_STATE_DISCONNECTED);
346 }
347
348 /*
349 Stop PCM stream.
350 */
line6_pcm_disconnect(struct snd_line6_pcm * line6pcm)351 void line6_pcm_disconnect(struct snd_line6_pcm *line6pcm)
352 {
353 pcm_disconnect_substream(get_substream
354 (line6pcm, SNDRV_PCM_STREAM_CAPTURE));
355 pcm_disconnect_substream(get_substream
356 (line6pcm, SNDRV_PCM_STREAM_PLAYBACK));
357 line6_unlink_wait_clear_audio_out_urbs(line6pcm);
358 line6_unlink_wait_clear_audio_in_urbs(line6pcm);
359 }
360
361 /*
362 Create and register the PCM device and mixer entries.
363 Create URBs for playback and capture.
364 */
line6_init_pcm(struct usb_line6 * line6,struct line6_pcm_properties * properties)365 int line6_init_pcm(struct usb_line6 *line6,
366 struct line6_pcm_properties *properties)
367 {
368 static struct snd_device_ops pcm_ops = {
369 .dev_free = snd_line6_pcm_free,
370 };
371
372 int err;
373 int ep_read = 0, ep_write = 0;
374 struct snd_line6_pcm *line6pcm;
375
376 if (!(line6->properties->capabilities & LINE6_BIT_PCM))
377 return 0; /* skip PCM initialization and report success */
378
379 /* initialize PCM subsystem based on product id: */
380 switch (line6->product) {
381 case LINE6_DEVID_BASSPODXT:
382 case LINE6_DEVID_BASSPODXTLIVE:
383 case LINE6_DEVID_BASSPODXTPRO:
384 case LINE6_DEVID_PODXT:
385 case LINE6_DEVID_PODXTLIVE:
386 case LINE6_DEVID_PODXTPRO:
387 case LINE6_DEVID_PODHD300:
388 ep_read = 0x82;
389 ep_write = 0x01;
390 break;
391
392 case LINE6_DEVID_PODHD500:
393 case LINE6_DEVID_PODX3:
394 case LINE6_DEVID_PODX3LIVE:
395 ep_read = 0x86;
396 ep_write = 0x02;
397 break;
398
399 case LINE6_DEVID_POCKETPOD:
400 ep_read = 0x82;
401 ep_write = 0x02;
402 break;
403
404 case LINE6_DEVID_GUITARPORT:
405 case LINE6_DEVID_PODSTUDIO_GX:
406 case LINE6_DEVID_PODSTUDIO_UX1:
407 case LINE6_DEVID_PODSTUDIO_UX2:
408 case LINE6_DEVID_TONEPORT_GX:
409 case LINE6_DEVID_TONEPORT_UX1:
410 case LINE6_DEVID_TONEPORT_UX2:
411 ep_read = 0x82;
412 ep_write = 0x01;
413 break;
414
415 /* this is for interface_number == 1:
416 case LINE6_DEVID_TONEPORT_UX2:
417 case LINE6_DEVID_PODSTUDIO_UX2:
418 ep_read = 0x87;
419 ep_write = 0x00;
420 break;
421 */
422
423 default:
424 MISSING_CASE;
425 }
426
427 line6pcm = kzalloc(sizeof(struct snd_line6_pcm), GFP_KERNEL);
428
429 if (line6pcm == NULL)
430 return -ENOMEM;
431
432 line6pcm->volume_playback[0] = line6pcm->volume_playback[1] = 255;
433 line6pcm->volume_monitor = 255;
434 line6pcm->line6 = line6;
435 line6pcm->ep_audio_read = ep_read;
436 line6pcm->ep_audio_write = ep_write;
437
438 /* Read and write buffers are sized identically, so choose minimum */
439 line6pcm->max_packet_size = min(
440 usb_maxpacket(line6->usbdev,
441 usb_rcvisocpipe(line6->usbdev, ep_read), 0),
442 usb_maxpacket(line6->usbdev,
443 usb_sndisocpipe(line6->usbdev, ep_write), 1));
444
445 line6pcm->properties = properties;
446 line6->line6pcm = line6pcm;
447
448 /* PCM device: */
449 err = snd_device_new(line6->card, SNDRV_DEV_PCM, line6, &pcm_ops);
450 if (err < 0)
451 return err;
452
453 snd_card_set_dev(line6->card, line6->ifcdev);
454
455 err = snd_line6_new_pcm(line6pcm);
456 if (err < 0)
457 return err;
458
459 spin_lock_init(&line6pcm->lock_audio_out);
460 spin_lock_init(&line6pcm->lock_audio_in);
461 spin_lock_init(&line6pcm->lock_trigger);
462
463 err = line6_create_audio_out_urbs(line6pcm);
464 if (err < 0)
465 return err;
466
467 err = line6_create_audio_in_urbs(line6pcm);
468 if (err < 0)
469 return err;
470
471 /* mixer: */
472 err =
473 snd_ctl_add(line6->card,
474 snd_ctl_new1(&line6_control_playback, line6pcm));
475 if (err < 0)
476 return err;
477
478 #ifdef CONFIG_LINE6_USB_IMPULSE_RESPONSE
479 /* impulse response test: */
480 err = device_create_file(line6->ifcdev, &dev_attr_impulse_volume);
481 if (err < 0)
482 return err;
483
484 err = device_create_file(line6->ifcdev, &dev_attr_impulse_period);
485 if (err < 0)
486 return err;
487
488 line6pcm->impulse_period = LINE6_IMPULSE_DEFAULT_PERIOD;
489 #endif
490
491 return 0;
492 }
493
494 /* prepare pcm callback */
snd_line6_prepare(struct snd_pcm_substream * substream)495 int snd_line6_prepare(struct snd_pcm_substream *substream)
496 {
497 struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream);
498
499 switch (substream->stream) {
500 case SNDRV_PCM_STREAM_PLAYBACK:
501 if ((line6pcm->flags & MASK_PLAYBACK) == 0)
502 line6_unlink_wait_clear_audio_out_urbs(line6pcm);
503
504 break;
505
506 case SNDRV_PCM_STREAM_CAPTURE:
507 if ((line6pcm->flags & MASK_CAPTURE) == 0)
508 line6_unlink_wait_clear_audio_in_urbs(line6pcm);
509
510 break;
511
512 default:
513 MISSING_CASE;
514 }
515
516 if (!test_and_set_bit(BIT_PREPARED, &line6pcm->flags)) {
517 line6pcm->count_out = 0;
518 line6pcm->pos_out = 0;
519 line6pcm->pos_out_done = 0;
520 line6pcm->bytes_out = 0;
521 line6pcm->count_in = 0;
522 line6pcm->pos_in_done = 0;
523 line6pcm->bytes_in = 0;
524 }
525
526 return 0;
527 }
528