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_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
  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         kfree(line6pcm->prev_fbuf);
 193 #endif
 194
 195         return 0;
 196 }
 197
 198 /* trigger callback */
 199 int 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 */
 244 static 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 */
 255 static 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 */
 268 static 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 */
 286 static 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 */
 299 static 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 */
 322 static 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 */
 353 static int snd_line6_pcm_free(struct snd_device *device)
 354 {
 355         return 0;
 356 }
 357
 358 /*
 359         Stop substream if still running.
 360 */
 361 static void pcm_disconnect_substream(struct snd_pcm_substream *substream)
 362 {
 363         if (substream->runtime && snd_pcm_running(substream)) {
 364                 snd_pcm_stream_lock_irq(substream);
 365                 snd_pcm_stop(substream, SNDRV_PCM_STATE_DISCONNECTED);
 366                 snd_pcm_stream_unlock_irq(substream);
 367         }
 368 }
 369
 370 /*
 371         Stop PCM stream.
 372 */
 373 void line6_pcm_disconnect(struct snd_line6_pcm *line6pcm)
 374 {
 375         pcm_disconnect_substream(get_substream
 376                                  (line6pcm, SNDRV_PCM_STREAM_CAPTURE));
 377         pcm_disconnect_substream(get_substream
 378                                  (line6pcm, SNDRV_PCM_STREAM_PLAYBACK));
 379         line6_unlink_wait_clear_audio_out_urbs(line6pcm);
 380         line6_unlink_wait_clear_audio_in_urbs(line6pcm);
 381 }
 382
 383 /*
 384         Create and register the PCM device and mixer entries.
 385         Create URBs for playback and capture.
 386 */
 387 int line6_init_pcm(struct usb_line6 *line6,
 388                    struct line6_pcm_properties *properties)
 389 {
 390         static struct snd_device_ops pcm_ops = {
 391                 .dev_free = snd_line6_pcm_free,
 392         };
 393
 394         int err;
 395         int ep_read = 0, ep_write = 0;
 396         struct snd_line6_pcm *line6pcm;
 397
 398         if (!(line6->properties->capabilities & LINE6_BIT_PCM))
 399                 return 0;       /* skip PCM initialization and report success */
 400
 401         /* initialize PCM subsystem based on product id: */
 402         switch (line6->product) {
 403         case LINE6_DEVID_BASSPODXT:
 404         case LINE6_DEVID_BASSPODXTLIVE:
 405         case LINE6_DEVID_BASSPODXTPRO:
 406         case LINE6_DEVID_PODXT:
 407         case LINE6_DEVID_PODXTLIVE:
 408         case LINE6_DEVID_PODXTPRO:
 409                 ep_read = 0x82;
 410                 ep_write = 0x01;
 411                 break;
 412
 413         case LINE6_DEVID_PODX3:
 414         case LINE6_DEVID_PODX3LIVE:
 415                 ep_read = 0x86;
 416                 ep_write = 0x02;
 417                 break;
 418
 419         case LINE6_DEVID_POCKETPOD:
 420                 ep_read = 0x82;
 421                 ep_write = 0x02;
 422                 break;
 423
 424         case LINE6_DEVID_GUITARPORT:
 425         case LINE6_DEVID_PODSTUDIO_GX:
 426         case LINE6_DEVID_PODSTUDIO_UX1:
 427         case LINE6_DEVID_PODSTUDIO_UX2:
 428         case LINE6_DEVID_TONEPORT_GX:
 429         case LINE6_DEVID_TONEPORT_UX1:
 430         case LINE6_DEVID_TONEPORT_UX2:
 431                 ep_read = 0x82;
 432                 ep_write = 0x01;
 433                 break;
 434
 435                 /* this is for interface_number == 1:
 436                    case LINE6_DEVID_TONEPORT_UX2:
 437                    case LINE6_DEVID_PODSTUDIO_UX2:
 438                    ep_read  = 0x87;
 439                    ep_write = 0x00;
 440                    break;
 441                  */
 442
 443         default:
 444                 MISSING_CASE;
 445         }
 446
 447         line6pcm = kzalloc(sizeof(struct snd_line6_pcm), GFP_KERNEL);
 448
 449         if (line6pcm == NULL)
 450                 return -ENOMEM;
 451
 452         line6pcm->volume_playback[0] = line6pcm->volume_playback[1] = 255;
 453         line6pcm->volume_monitor = 255;
 454         line6pcm->line6 = line6;
 455         line6pcm->ep_audio_read = ep_read;
 456         line6pcm->ep_audio_write = ep_write;
 457         line6pcm->max_packet_size = usb_maxpacket(line6->usbdev,
 458                                                   usb_rcvintpipe(line6->usbdev,
 459                                                                  ep_read), 0);
 460         line6pcm->properties = properties;
 461         line6->line6pcm = line6pcm;
 462
 463         /* PCM device: */
 464         err = snd_device_new(line6->card, SNDRV_DEV_PCM, line6, &pcm_ops);
 465         if (err < 0)
 466                 return err;
 467
 468         snd_card_set_dev(line6->card, line6->ifcdev);
 469
 470         err = snd_line6_new_pcm(line6pcm);
 471         if (err < 0)
 472                 return err;
 473
 474         spin_lock_init(&line6pcm->lock_audio_out);
 475         spin_lock_init(&line6pcm->lock_audio_in);
 476         spin_lock_init(&line6pcm->lock_trigger);
 477
 478         err = line6_create_audio_out_urbs(line6pcm);
 479         if (err < 0)
 480                 return err;
 481
 482         err = line6_create_audio_in_urbs(line6pcm);
 483         if (err < 0)
 484                 return err;
 485
 486         /* mixer: */
 487         err =
 488             snd_ctl_add(line6->card,
 489                         snd_ctl_new1(&line6_control_playback, line6pcm));
 490         if (err < 0)
 491                 return err;
 492
 493 #ifdef CONFIG_LINE6_USB_IMPULSE_RESPONSE
 494         /* impulse response test: */
 495         err = device_create_file(line6->ifcdev, &dev_attr_impulse_volume);
 496         if (err < 0)
 497                 return err;
 498
 499         err = device_create_file(line6->ifcdev, &dev_attr_impulse_period);
 500         if (err < 0)
 501                 return err;
 502
 503         line6pcm->impulse_period = LINE6_IMPULSE_DEFAULT_PERIOD;
 504 #endif
 505
 506         return 0;
 507 }
 508
 509 /* prepare pcm callback */
 510 int snd_line6_prepare(struct snd_pcm_substream *substream)
 511 {
 512         struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream);
 513
 514         if (!test_and_set_bit(BIT_PREPARED, &line6pcm->flags)) {
 515                 line6pcm->count_out = 0;
 516                 line6pcm->pos_out = 0;
 517                 line6pcm->pos_out_done = 0;
 518                 line6pcm->bytes_out = 0;
 519                 line6pcm->count_in = 0;
 520                 line6pcm->pos_in_done = 0;
 521                 line6pcm->bytes_in = 0;
 522         }
 523
 524         return 0;
 525 }