drivers/staging/line6/pcm.c

   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
  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 */
  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 */
  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 */
  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 */
  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_IWUGO | S_IRUGO, pcm_get_impulse_volume,
  83                    pcm_set_impulse_volume);
  84 static DEVICE_ATTR(impulse_period, S_IWUGO | S_IRUGO, pcm_get_impulse_period,
  85                    pcm_set_impulse_period);
  86
  87 #endif
  88
  89 int 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
 172 int 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         if (line6pcm->prev_fbuf != NULL)
 193                 kfree(line6pcm->prev_fbuf);
 194 #endif
 195
 196         return 0;
 197 }
 198
 199 /* trigger callback */
 200 int snd_line6_trigger(struct snd_pcm_substream *substream, int cmd)
 201 {
 202         struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream);
 203         struct snd_pcm_substream *s;
 204         int err;
 205         unsigned long flags;
 206
 207         spin_lock_irqsave(&line6pcm->lock_trigger, flags);
 208         clear_bit(BIT_PREPARED, &line6pcm->flags);
 209
 210         snd_pcm_group_for_each_entry(s, substream) {
 211                 switch (s->stream) {
 212                 case SNDRV_PCM_STREAM_PLAYBACK:
 213                         err = snd_line6_playback_trigger(line6pcm, cmd);
 214
 215                         if (err < 0) {
 216                                 spin_unlock_irqrestore(&line6pcm->lock_trigger,
 217                                                        flags);
 218                                 return err;
 219                         }
 220
 221                         break;
 222
 223                 case SNDRV_PCM_STREAM_CAPTURE:
 224                         err = snd_line6_capture_trigger(line6pcm, cmd);
 225
 226                         if (err < 0) {
 227                                 spin_unlock_irqrestore(&line6pcm->lock_trigger,
 228                                                        flags);
 229                                 return err;
 230                         }
 231
 232                         break;
 233
 234                 default:
 235                         dev_err(line6pcm->line6->ifcdev,
 236                                 "Unknown stream direction %d\n", s->stream);
 237                 }
 238         }
 239
 240         spin_unlock_irqrestore(&line6pcm->lock_trigger, flags);
 241         return 0;
 242 }
 243
 244 /* control info callback */
 245 static int snd_line6_control_playback_info(struct snd_kcontrol *kcontrol,
 246                                            struct snd_ctl_elem_info *uinfo)
 247 {
 248         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 249         uinfo->count = 2;
 250         uinfo->value.integer.min = 0;
 251         uinfo->value.integer.max = 256;
 252         return 0;
 253 }
 254
 255 /* control get callback */
 256 static int snd_line6_control_playback_get(struct snd_kcontrol *kcontrol,
 257                                           struct snd_ctl_elem_value *ucontrol)
 258 {
 259         int i;
 260         struct snd_line6_pcm *line6pcm = snd_kcontrol_chip(kcontrol);
 261
 262         for (i = 2; i--;)
 263                 ucontrol->value.integer.value[i] = line6pcm->volume_playback[i];
 264
 265         return 0;
 266 }
 267
 268 /* control put callback */
 269 static int snd_line6_control_playback_put(struct snd_kcontrol *kcontrol,
 270                                           struct snd_ctl_elem_value *ucontrol)
 271 {
 272         int i, changed = 0;
 273         struct snd_line6_pcm *line6pcm = snd_kcontrol_chip(kcontrol);
 274
 275         for (i = 2; i--;)
 276                 if (line6pcm->volume_playback[i] !=
 277                     ucontrol->value.integer.value[i]) {
 278                         line6pcm->volume_playback[i] =
 279                             ucontrol->value.integer.value[i];
 280                         changed = 1;
 281                 }
 282
 283         return changed;
 284 }
 285
 286 /* control definition */
 287 static struct snd_kcontrol_new line6_control_playback = {
 288         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 289         .name = "PCM Playback Volume",
 290         .index = 0,
 291         .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 292         .info = snd_line6_control_playback_info,
 293         .get = snd_line6_control_playback_get,
 294         .put = snd_line6_control_playback_put
 295 };
 296
 297 /*
 298         Cleanup the PCM device.
 299 */
 300 static void line6_cleanup_pcm(struct snd_pcm *pcm)
 301 {
 302         int i;
 303         struct snd_line6_pcm *line6pcm = snd_pcm_chip(pcm);
 304
 305 #ifdef CONFIG_LINE6_USB_IMPULSE_RESPONSE
 306         device_remove_file(line6pcm->line6->ifcdev, &dev_attr_impulse_volume);
 307         device_remove_file(line6pcm->line6->ifcdev, &dev_attr_impulse_period);
 308 #endif
 309
 310         for (i = LINE6_ISO_BUFFERS; i--;) {
 311                 if (line6pcm->urb_audio_out[i]) {
 312                         usb_kill_urb(line6pcm->urb_audio_out[i]);
 313                         usb_free_urb(line6pcm->urb_audio_out[i]);
 314                 }
 315                 if (line6pcm->urb_audio_in[i]) {
 316                         usb_kill_urb(line6pcm->urb_audio_in[i]);
 317                         usb_free_urb(line6pcm->urb_audio_in[i]);
 318                 }
 319         }
 320 }
 321
 322 /* create a PCM device */
 323 static int snd_line6_new_pcm(struct snd_line6_pcm *line6pcm)
 324 {
 325         struct snd_pcm *pcm;
 326         int err;
 327
 328         err = snd_pcm_new(line6pcm->line6->card,
 329                           (char *)line6pcm->line6->properties->name,
 330                           0, 1, 1, &pcm);
 331         if (err < 0)
 332                 return err;
 333
 334         pcm->private_data = line6pcm;
 335         pcm->private_free = line6_cleanup_pcm;
 336         line6pcm->pcm = pcm;
 337         strcpy(pcm->name, line6pcm->line6->properties->name);
 338
 339         /* set operators */
 340         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
 341                         &snd_line6_playback_ops);
 342         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_line6_capture_ops);
 343
 344         /* pre-allocation of buffers */
 345         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS,
 346                                               snd_dma_continuous_data
 347                                               (GFP_KERNEL), 64 * 1024,
 348                                               128 * 1024);
 349
 350         return 0;
 351 }
 352
 353 /* PCM device destructor */
 354 static int snd_line6_pcm_free(struct snd_device *device)
 355 {
 356         return 0;
 357 }
 358
 359 /*
 360         Stop substream if still running.
 361 */
 362 static void pcm_disconnect_substream(struct snd_pcm_substream *substream)
 363 {
 364         if (substream->runtime && snd_pcm_running(substream))
 365                 snd_pcm_stop(substream, SNDRV_PCM_STATE_DISCONNECTED);
 366 }
 367
 368 /*
 369         Stop PCM stream.
 370 */
 371 void line6_pcm_disconnect(struct snd_line6_pcm *line6pcm)
 372 {
 373         pcm_disconnect_substream(get_substream
 374                                  (line6pcm, SNDRV_PCM_STREAM_CAPTURE));
 375         pcm_disconnect_substream(get_substream
 376                                  (line6pcm, SNDRV_PCM_STREAM_PLAYBACK));
 377         line6_unlink_wait_clear_audio_out_urbs(line6pcm);
 378         line6_unlink_wait_clear_audio_in_urbs(line6pcm);
 379 }
 380
 381 /*
 382         Create and register the PCM device and mixer entries.
 383         Create URBs for playback and capture.
 384 */
 385 int line6_init_pcm(struct usb_line6 *line6,
 386                    struct line6_pcm_properties *properties)
 387 {
 388         static struct snd_device_ops pcm_ops = {
 389                 .dev_free = snd_line6_pcm_free,
 390         };
 391
 392         int err;
 393         int ep_read = 0, ep_write = 0;
 394         struct snd_line6_pcm *line6pcm;
 395
 396         if (!(line6->properties->capabilities & LINE6_BIT_PCM))
 397                 return 0;       /* skip PCM initialization and report success */
 398
 399         /* initialize PCM subsystem based on product id: */
 400         switch (line6->product) {
 401         case LINE6_DEVID_BASSPODXT:
 402         case LINE6_DEVID_BASSPODXTLIVE:
 403         case LINE6_DEVID_BASSPODXTPRO:
 404         case LINE6_DEVID_PODXT:
 405         case LINE6_DEVID_PODXTLIVE:
 406         case LINE6_DEVID_PODXTPRO:
 407                 ep_read = 0x82;
 408                 ep_write = 0x01;
 409                 break;
 410
 411         case LINE6_DEVID_PODX3:
 412         case LINE6_DEVID_PODX3LIVE:
 413                 ep_read = 0x86;
 414                 ep_write = 0x02;
 415                 break;
 416
 417         case LINE6_DEVID_POCKETPOD:
 418                 ep_read = 0x82;
 419                 ep_write = 0x02;
 420                 break;
 421
 422         case LINE6_DEVID_GUITARPORT:
 423         case LINE6_DEVID_PODSTUDIO_GX:
 424         case LINE6_DEVID_PODSTUDIO_UX1:
 425         case LINE6_DEVID_PODSTUDIO_UX2:
 426         case LINE6_DEVID_TONEPORT_GX:
 427         case LINE6_DEVID_TONEPORT_UX1:
 428         case LINE6_DEVID_TONEPORT_UX2:
 429                 ep_read = 0x82;
 430                 ep_write = 0x01;
 431                 break;
 432
 433                 /* this is for interface_number == 1:
 434                    case LINE6_DEVID_TONEPORT_UX2:
 435                    case LINE6_DEVID_PODSTUDIO_UX2:
 436                    ep_read  = 0x87;
 437                    ep_write = 0x00;
 438                    break;
 439                  */
 440
 441         default:
 442                 MISSING_CASE;
 443         }
 444
 445         line6pcm = kzalloc(sizeof(struct snd_line6_pcm), GFP_KERNEL);
 446
 447         if (line6pcm == NULL)
 448                 return -ENOMEM;
 449
 450         line6pcm->volume_playback[0] = line6pcm->volume_playback[1] = 255;
 451         line6pcm->volume_monitor = 255;
 452         line6pcm->line6 = line6;
 453         line6pcm->ep_audio_read = ep_read;
 454         line6pcm->ep_audio_write = ep_write;
 455         line6pcm->max_packet_size = usb_maxpacket(line6->usbdev,
 456                                                   usb_rcvintpipe(line6->usbdev,
 457                                                                  ep_read), 0);
 458         line6pcm->properties = properties;
 459         line6->line6pcm = line6pcm;
 460
 461         /* PCM device: */
 462         err = snd_device_new(line6->card, SNDRV_DEV_PCM, line6, &pcm_ops);
 463         if (err < 0)
 464                 return err;
 465
 466         snd_card_set_dev(line6->card, line6->ifcdev);
 467
 468         err = snd_line6_new_pcm(line6pcm);
 469         if (err < 0)
 470                 return err;
 471
 472         spin_lock_init(&line6pcm->lock_audio_out);
 473         spin_lock_init(&line6pcm->lock_audio_in);
 474         spin_lock_init(&line6pcm->lock_trigger);
 475
 476         err = line6_create_audio_out_urbs(line6pcm);
 477         if (err < 0)
 478                 return err;
 479
 480         err = line6_create_audio_in_urbs(line6pcm);
 481         if (err < 0)
 482                 return err;
 483
 484         /* mixer: */
 485         err =
 486             snd_ctl_add(line6->card,
 487                         snd_ctl_new1(&line6_control_playback, line6pcm));
 488         if (err < 0)
 489                 return err;
 490
 491 #ifdef CONFIG_LINE6_USB_IMPULSE_RESPONSE
 492         /* impulse response test: */
 493         err = device_create_file(line6->ifcdev, &dev_attr_impulse_volume);
 494         if (err < 0)
 495                 return err;
 496
 497         err = device_create_file(line6->ifcdev, &dev_attr_impulse_period);
 498         if (err < 0)
 499                 return err;
 500
 501         line6pcm->impulse_period = LINE6_IMPULSE_DEFAULT_PERIOD;
 502 #endif
 503
 504         return 0;
 505 }
 506
 507 /* prepare pcm callback */
 508 int snd_line6_prepare(struct snd_pcm_substream *substream)
 509 {
 510         struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream);
 511
 512         if (!test_and_set_bit(BIT_PREPARED, &line6pcm->flags)) {
 513                 line6pcm->count_out = 0;
 514                 line6pcm->pos_out = 0;
 515                 line6pcm->pos_out_done = 0;
 516                 line6pcm->bytes_out = 0;
 517                 line6pcm->count_in = 0;
 518                 line6pcm->pos_in_done = 0;
 519                 line6pcm->bytes_in = 0;
 520         }
 521
 522         return 0;
 523 }