kernel/2.6.29.6-aldebaran-rt/sound/usb/usx2y/us122l.c

   1 /*
   2  * Copyright (C) 2007, 2008 Karsten Wiese <fzu@wemgehoertderstaat.de>
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU General Public License as published by the
   6  * Free Software Foundation; either version 2 of the License, or (at your
   7  * option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  11  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software Foundation,
  16  * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17  */
  18
  19 #include <sound/core.h>
  20 #include <sound/hwdep.h>
  21 #include <sound/pcm.h>
  22 #include <sound/initval.h>
  23 #define MODNAME "US122L"
  24 #include "usb_stream.c"
  25 #include "../usbaudio.h"
  26 #include "us122l.h"
  27
  28 MODULE_AUTHOR("Karsten Wiese <fzu@wemgehoertderstaat.de>");
  29 MODULE_DESCRIPTION("TASCAM "NAME_ALLCAPS" Version 0.5");
  30 MODULE_LICENSE("GPL");
  31
  32 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;      /* Index 0-max */
  33 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* Id for this card */
  34                                                         /* Enable this card */
  35 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
  36
  37 module_param_array(index, int, NULL, 0444);
  38 MODULE_PARM_DESC(index, "Index value for "NAME_ALLCAPS".");
  39 module_param_array(id, charp, NULL, 0444);
  40 MODULE_PARM_DESC(id, "ID string for "NAME_ALLCAPS".");
  41 module_param_array(enable, bool, NULL, 0444);
  42 MODULE_PARM_DESC(enable, "Enable "NAME_ALLCAPS".");
  43
  44 static int snd_us122l_card_used[SNDRV_CARDS];
  45
  46
  47 static int us122l_create_usbmidi(struct snd_card *card)
  48 {
  49         static struct snd_usb_midi_endpoint_info quirk_data = {
  50                 .out_ep = 4,
  51                 .in_ep = 3,
  52                 .out_cables =   0x001,
  53                 .in_cables =    0x001
  54         };
  55         static struct snd_usb_audio_quirk quirk = {
  56                 .vendor_name =  "US122L",
  57                 .product_name = NAME_ALLCAPS,
  58                 .ifnum =        1,
  59                 .type = QUIRK_MIDI_US122L,
  60                 .data = &quirk_data
  61         };
  62         struct usb_device *dev = US122L(card)->chip.dev;
  63         struct usb_interface *iface = usb_ifnum_to_if(dev, 1);
  64
  65         return snd_usb_create_midi_interface(&US122L(card)->chip,
  66                                              iface, &quirk);
  67 }
  68
  69 /*
  70  * Wrapper for usb_control_msg().
  71  * Allocates a temp buffer to prevent dmaing from/to the stack.
  72  */
  73 static int us122l_ctl_msg(struct usb_device *dev, unsigned int pipe,
  74                           __u8 request, __u8 requesttype,
  75                           __u16 value, __u16 index, void *data,
  76                           __u16 size, int timeout)
  77 {
  78         int err;
  79         void *buf = NULL;
  80
  81         if (size > 0) {
  82                 buf = kmemdup(data, size, GFP_KERNEL);
  83                 if (!buf)
  84                         return -ENOMEM;
  85         }
  86         err = usb_control_msg(dev, pipe, request, requesttype,
  87                               value, index, buf, size, timeout);
  88         if (size > 0) {
  89                 memcpy(data, buf, size);
  90                 kfree(buf);
  91         }
  92         return err;
  93 }
  94
  95 static void pt_info_set(struct usb_device *dev, u8 v)
  96 {
  97         int ret;
  98
  99         ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 100                               'I',
 101                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 102                               v, 0, NULL, 0, 1000);
 103         snd_printdd(KERN_DEBUG "%i\n", ret);
 104 }
 105
 106 static void usb_stream_hwdep_vm_open(struct vm_area_struct *area)
 107 {
 108         struct us122l *us122l = area->vm_private_data;
 109         atomic_inc(&us122l->mmap_count);
 110         snd_printdd(KERN_DEBUG "%i\n", atomic_read(&us122l->mmap_count));
 111 }
 112
 113 static int usb_stream_hwdep_vm_fault(struct vm_area_struct *area,
 114                                      struct vm_fault *vmf)
 115 {
 116         unsigned long offset;
 117         struct page *page;
 118         void *vaddr;
 119         struct us122l *us122l = area->vm_private_data;
 120         struct usb_stream *s;
 121
 122         mutex_lock(&us122l->mutex);
 123         s = us122l->sk.s;
 124         if (!s)
 125                 goto unlock;
 126
 127         offset = vmf->pgoff << PAGE_SHIFT;
 128         if (offset < PAGE_ALIGN(s->read_size))
 129                 vaddr = (char *)s + offset;
 130         else {
 131                 offset -= PAGE_ALIGN(s->read_size);
 132                 if (offset >= PAGE_ALIGN(s->write_size))
 133                         goto unlock;
 134
 135                 vaddr = us122l->sk.write_page + offset;
 136         }
 137         page = virt_to_page(vaddr);
 138
 139         get_page(page);
 140         mutex_unlock(&us122l->mutex);
 141
 142         vmf->page = page;
 143
 144         return 0;
 145 unlock:
 146         mutex_unlock(&us122l->mutex);
 147         return VM_FAULT_SIGBUS;
 148 }
 149
 150 static void usb_stream_hwdep_vm_close(struct vm_area_struct *area)
 151 {
 152         struct us122l *us122l = area->vm_private_data;
 153         atomic_dec(&us122l->mmap_count);
 154         snd_printdd(KERN_DEBUG "%i\n", atomic_read(&us122l->mmap_count));
 155 }
 156
 157 static struct vm_operations_struct usb_stream_hwdep_vm_ops = {
 158         .open = usb_stream_hwdep_vm_open,
 159         .fault = usb_stream_hwdep_vm_fault,
 160         .close = usb_stream_hwdep_vm_close,
 161 };
 162
 163
 164 static int usb_stream_hwdep_open(struct snd_hwdep *hw, struct file *file)
 165 {
 166         struct us122l   *us122l = hw->private_data;
 167         struct usb_interface *iface;
 168         snd_printdd(KERN_DEBUG "%p %p\n", hw, file);
 169         if (hw->used >= 2)
 170                 return -EBUSY;
 171
 172         if (!us122l->first)
 173                 us122l->first = file;
 174         iface = usb_ifnum_to_if(us122l->chip.dev, 1);
 175         usb_autopm_get_interface(iface);
 176         return 0;
 177 }
 178
 179 static int usb_stream_hwdep_release(struct snd_hwdep *hw, struct file *file)
 180 {
 181         struct us122l   *us122l = hw->private_data;
 182         struct usb_interface *iface = usb_ifnum_to_if(us122l->chip.dev, 1);
 183         snd_printdd(KERN_DEBUG "%p %p\n", hw, file);
 184         usb_autopm_put_interface(iface);
 185         if (us122l->first == file)
 186                 us122l->first = NULL;
 187         mutex_lock(&us122l->mutex);
 188         if (us122l->master == file)
 189                 us122l->master = us122l->slave;
 190
 191         us122l->slave = NULL;
 192         mutex_unlock(&us122l->mutex);
 193         return 0;
 194 }
 195
 196 static int usb_stream_hwdep_mmap(struct snd_hwdep *hw,
 197                                  struct file *filp, struct vm_area_struct *area)
 198 {
 199         unsigned long   size = area->vm_end - area->vm_start;
 200         struct us122l   *us122l = hw->private_data;
 201         unsigned long offset;
 202         struct usb_stream *s;
 203         int err = 0;
 204         bool read;
 205
 206         offset = area->vm_pgoff << PAGE_SHIFT;
 207         mutex_lock(&us122l->mutex);
 208         s = us122l->sk.s;
 209         read = offset < s->read_size;
 210         if (read && area->vm_flags & VM_WRITE) {
 211                 err = -EPERM;
 212                 goto out;
 213         }
 214         snd_printdd(KERN_DEBUG "%lu %u\n", size,
 215                     read ? s->read_size : s->write_size);
 216         /* if userspace tries to mmap beyond end of our buffer, fail */
 217         if (size > PAGE_ALIGN(read ? s->read_size : s->write_size)) {
 218                 snd_printk(KERN_WARNING "%lu > %u\n", size,
 219                            read ? s->read_size : s->write_size);
 220                 err = -EINVAL;
 221                 goto out;
 222         }
 223
 224         area->vm_ops = &usb_stream_hwdep_vm_ops;
 225         area->vm_flags |= VM_RESERVED;
 226         area->vm_private_data = us122l;
 227         atomic_inc(&us122l->mmap_count);
 228 out:
 229         mutex_unlock(&us122l->mutex);
 230         return err;
 231 }
 232
 233 static unsigned int usb_stream_hwdep_poll(struct snd_hwdep *hw,
 234                                           struct file *file, poll_table *wait)
 235 {
 236         struct us122l   *us122l = hw->private_data;
 237         struct usb_stream *s = us122l->sk.s;
 238         unsigned        *polled;
 239         unsigned int    mask;
 240
 241         poll_wait(file, &us122l->sk.sleep, wait);
 242
 243         switch (s->state) {
 244         case usb_stream_ready:
 245                 if (us122l->first == file)
 246                         polled = &s->periods_polled;
 247                 else
 248                         polled = &us122l->second_periods_polled;
 249                 if (*polled != s->periods_done) {
 250                         *polled = s->periods_done;
 251                         mask = POLLIN | POLLOUT | POLLWRNORM;
 252                         break;
 253                 }
 254                 /* Fall through */
 255                 mask = 0;
 256                 break;
 257         default:
 258                 mask = POLLIN | POLLOUT | POLLWRNORM | POLLERR;
 259                 break;
 260         }
 261         return mask;
 262 }
 263
 264 static void us122l_stop(struct us122l *us122l)
 265 {
 266         struct list_head *p;
 267         list_for_each(p, &us122l->chip.midi_list)
 268                 snd_usbmidi_input_stop(p);
 269
 270         usb_stream_stop(&us122l->sk);
 271         usb_stream_free(&us122l->sk);
 272 }
 273
 274 static int us122l_set_sample_rate(struct usb_device *dev, int rate)
 275 {
 276         unsigned int ep = 0x81;
 277         unsigned char data[3];
 278         int err;
 279
 280         data[0] = rate;
 281         data[1] = rate >> 8;
 282         data[2] = rate >> 16;
 283         err = us122l_ctl_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR,
 284                              USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
 285                              SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000);
 286         if (err < 0)
 287                 snd_printk(KERN_ERR "%d: cannot set freq %d to ep 0x%x\n",
 288                            dev->devnum, rate, ep);
 289         return err;
 290 }
 291
 292 static bool us122l_start(struct us122l *us122l,
 293                          unsigned rate, unsigned period_frames)
 294 {
 295         struct list_head *p;
 296         int err;
 297         unsigned use_packsize = 0;
 298         bool success = false;
 299
 300         if (us122l->chip.dev->speed == USB_SPEED_HIGH) {
 301                 /* The us-122l's descriptor defaults to iso max_packsize 78,
 302                    which isn't needed for samplerates <= 48000.
 303                    Lets save some memory:
 304                 */
 305                 switch (rate) {
 306                 case 44100:
 307                         use_packsize = 36;
 308                         break;
 309                 case 48000:
 310                         use_packsize = 42;
 311                         break;
 312                 case 88200:
 313                         use_packsize = 72;
 314                         break;
 315                 }
 316         }
 317         if (!usb_stream_new(&us122l->sk, us122l->chip.dev, 1, 2,
 318                             rate, use_packsize, period_frames, 6))
 319                 goto out;
 320
 321         err = us122l_set_sample_rate(us122l->chip.dev, rate);
 322         if (err < 0) {
 323                 us122l_stop(us122l);
 324                 snd_printk(KERN_ERR "us122l_set_sample_rate error \n");
 325                 goto out;
 326         }
 327         err = usb_stream_start(&us122l->sk);
 328         if (err < 0) {
 329                 us122l_stop(us122l);
 330                 snd_printk(KERN_ERR "us122l_start error %i \n", err);
 331                 goto out;
 332         }
 333         list_for_each(p, &us122l->chip.midi_list)
 334                 snd_usbmidi_input_start(p);
 335         success = true;
 336 out:
 337         return success;
 338 }
 339
 340 static int usb_stream_hwdep_ioctl(struct snd_hwdep *hw, struct file *file,
 341                                   unsigned cmd, unsigned long arg)
 342 {
 343         struct usb_stream_config *cfg;
 344         struct us122l *us122l = hw->private_data;
 345         unsigned min_period_frames;
 346         int err = 0;
 347         bool high_speed;
 348
 349         if (cmd != SNDRV_USB_STREAM_IOCTL_SET_PARAMS)
 350                 return -ENOTTY;
 351
 352         cfg = kmalloc(sizeof(*cfg), GFP_KERNEL);
 353         if (!cfg)
 354                 return -ENOMEM;
 355
 356         if (copy_from_user(cfg, (void *)arg, sizeof(*cfg))) {
 357                 err = -EFAULT;
 358                 goto free;
 359         }
 360         if (cfg->version != USB_STREAM_INTERFACE_VERSION) {
 361                 err = -ENXIO;
 362                 goto free;
 363         }
 364         high_speed = us122l->chip.dev->speed == USB_SPEED_HIGH;
 365         if ((cfg->sample_rate != 44100 && cfg->sample_rate != 48000  &&
 366              (!high_speed ||
 367               (cfg->sample_rate != 88200 && cfg->sample_rate != 96000))) ||
 368             cfg->frame_size != 6 ||
 369             cfg->period_frames > 0x3000) {
 370                 err = -EINVAL;
 371                 goto free;
 372         }
 373         switch (cfg->sample_rate) {
 374         case 44100:
 375                 min_period_frames = 48;
 376                 break;
 377         case 48000:
 378                 min_period_frames = 52;
 379                 break;
 380         default:
 381                 min_period_frames = 104;
 382                 break;
 383         }
 384         if (!high_speed)
 385                 min_period_frames <<= 1;
 386         if (cfg->period_frames < min_period_frames) {
 387                 err = -EINVAL;
 388                 goto free;
 389         }
 390
 391         snd_power_wait(hw->card, SNDRV_CTL_POWER_D0);
 392
 393         mutex_lock(&us122l->mutex);
 394         if (!us122l->master)
 395                 us122l->master = file;
 396         else if (us122l->master != file) {
 397                 if (memcmp(cfg, &us122l->sk.s->cfg, sizeof(*cfg))) {
 398                         err = -EIO;
 399                         goto unlock;
 400                 }
 401                 us122l->slave = file;
 402         }
 403         if (!us122l->sk.s ||
 404             memcmp(cfg, &us122l->sk.s->cfg, sizeof(*cfg)) ||
 405             us122l->sk.s->state == usb_stream_xrun) {
 406                 us122l_stop(us122l);
 407                 if (!us122l_start(us122l, cfg->sample_rate, cfg->period_frames))
 408                         err = -EIO;
 409                 else
 410                         err = 1;
 411         }
 412 unlock:
 413         mutex_unlock(&us122l->mutex);
 414 free:
 415         kfree(cfg);
 416         return err;
 417 }
 418
 419 #define SND_USB_STREAM_ID "USB STREAM"
 420 static int usb_stream_hwdep_new(struct snd_card *card)
 421 {
 422         int err;
 423         struct snd_hwdep *hw;
 424         struct usb_device *dev = US122L(card)->chip.dev;
 425
 426         err = snd_hwdep_new(card, SND_USB_STREAM_ID, 0, &hw);
 427         if (err < 0)
 428                 return err;
 429
 430         hw->iface = SNDRV_HWDEP_IFACE_USB_STREAM;
 431         hw->private_data = US122L(card);
 432         hw->ops.open = usb_stream_hwdep_open;
 433         hw->ops.release = usb_stream_hwdep_release;
 434         hw->ops.ioctl = usb_stream_hwdep_ioctl;
 435         hw->ops.ioctl_compat = usb_stream_hwdep_ioctl;
 436         hw->ops.mmap = usb_stream_hwdep_mmap;
 437         hw->ops.poll = usb_stream_hwdep_poll;
 438
 439         sprintf(hw->name, "/proc/bus/usb/%03d/%03d/hwdeppcm",
 440                 dev->bus->busnum, dev->devnum);
 441         return 0;
 442 }
 443
 444
 445 static bool us122l_create_card(struct snd_card *card)
 446 {
 447         int err;
 448         struct us122l *us122l = US122L(card);
 449
 450         err = usb_set_interface(us122l->chip.dev, 1, 1);
 451         if (err) {
 452                 snd_printk(KERN_ERR "usb_set_interface error \n");
 453                 return false;
 454         }
 455
 456         pt_info_set(us122l->chip.dev, 0x11);
 457         pt_info_set(us122l->chip.dev, 0x10);
 458
 459         if (!us122l_start(us122l, 44100, 256))
 460                 return false;
 461
 462         err = us122l_create_usbmidi(card);
 463         if (err < 0) {
 464                 snd_printk(KERN_ERR "us122l_create_usbmidi error %i \n", err);
 465                 us122l_stop(us122l);
 466                 return false;
 467         }
 468         err = usb_stream_hwdep_new(card);
 469         if (err < 0) {
 470 /* release the midi resources */
 471                 struct list_head *p;
 472                 list_for_each(p, &us122l->chip.midi_list)
 473                         snd_usbmidi_disconnect(p);
 474
 475                 us122l_stop(us122l);
 476                 return false;
 477         }
 478         return true;
 479 }
 480
 481 static void snd_us122l_free(struct snd_card *card)
 482 {
 483         struct us122l   *us122l = US122L(card);
 484         int             index = us122l->chip.index;
 485         if (index >= 0  &&  index < SNDRV_CARDS)
 486                 snd_us122l_card_used[index] = 0;
 487 }
 488
 489 static struct snd_card *usx2y_create_card(struct usb_device *device)
 490 {
 491         int             dev;
 492         struct snd_card *card;
 493         for (dev = 0; dev < SNDRV_CARDS; ++dev)
 494                 if (enable[dev] && !snd_us122l_card_used[dev])
 495                         break;
 496         if (dev >= SNDRV_CARDS)
 497                 return NULL;
 498         card = snd_card_new(index[dev], id[dev], THIS_MODULE,
 499                             sizeof(struct us122l));
 500         if (!card)
 501                 return NULL;
 502         snd_us122l_card_used[US122L(card)->chip.index = dev] = 1;
 503         card->private_free = snd_us122l_free;
 504         US122L(card)->chip.dev = device;
 505         US122L(card)->chip.card = card;
 506         mutex_init(&US122L(card)->mutex);
 507         init_waitqueue_head(&US122L(card)->sk.sleep);
 508         INIT_LIST_HEAD(&US122L(card)->chip.midi_list);
 509         strcpy(card->driver, "USB "NAME_ALLCAPS"");
 510         sprintf(card->shortname, "TASCAM "NAME_ALLCAPS"");
 511         sprintf(card->longname, "%s (%x:%x if %d at %03d/%03d)",
 512                 card->shortname,
 513                 le16_to_cpu(device->descriptor.idVendor),
 514                 le16_to_cpu(device->descriptor.idProduct),
 515                 0,
 516                 US122L(card)->chip.dev->bus->busnum,
 517                 US122L(card)->chip.dev->devnum
 518                 );
 519         snd_card_set_dev(card, &device->dev);
 520         return card;
 521 }
 522
 523 static void *us122l_usb_probe(struct usb_interface *intf,
 524                               const struct usb_device_id *device_id)
 525 {
 526         struct usb_device *device = interface_to_usbdev(intf);
 527         struct snd_card *card = usx2y_create_card(device);
 528
 529         if (!card)
 530                 return NULL;
 531
 532         if (!us122l_create_card(card) ||
 533             snd_card_register(card) < 0) {
 534                 snd_card_free(card);
 535                 return NULL;
 536         }
 537
 538         usb_get_dev(device);
 539         return card;
 540 }
 541
 542 static int snd_us122l_probe(struct usb_interface *intf,
 543                             const struct usb_device_id *id)
 544 {
 545         struct snd_card *card;
 546         snd_printdd(KERN_DEBUG"%p:%i\n",
 547                     intf, intf->cur_altsetting->desc.bInterfaceNumber);
 548         if (intf->cur_altsetting->desc.bInterfaceNumber != 1)
 549                 return 0;
 550
 551         card = us122l_usb_probe(usb_get_intf(intf), id);
 552
 553         if (card) {
 554                 usb_set_intfdata(intf, card);
 555                 return 0;
 556         }
 557
 558         usb_put_intf(intf);
 559         return -EIO;
 560 }
 561
 562 static void snd_us122l_disconnect(struct usb_interface *intf)
 563 {
 564         struct snd_card *card;
 565         struct us122l *us122l;
 566         struct list_head *p;
 567
 568         card = usb_get_intfdata(intf);
 569         if (!card)
 570                 return;
 571
 572         snd_card_disconnect(card);
 573
 574         us122l = US122L(card);
 575         mutex_lock(&us122l->mutex);
 576         us122l_stop(us122l);
 577         mutex_unlock(&us122l->mutex);
 578         us122l->chip.shutdown = 1;
 579
 580 /* release the midi resources */
 581         list_for_each(p, &us122l->chip.midi_list) {
 582                 snd_usbmidi_disconnect(p);
 583         }
 584
 585         usb_put_intf(intf);
 586         usb_put_dev(us122l->chip.dev);
 587
 588         while (atomic_read(&us122l->mmap_count))
 589                 msleep(500);
 590
 591         snd_card_free(card);
 592 }
 593
 594 static int snd_us122l_suspend(struct usb_interface *intf, pm_message_t message)
 595 {
 596         struct snd_card *card;
 597         struct us122l *us122l;
 598         struct list_head *p;
 599
 600         card = usb_get_intfdata(intf);
 601         if (!card)
 602                 return 0;
 603         snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
 604
 605         us122l = US122L(card);
 606         if (!us122l)
 607                 return 0;
 608
 609         list_for_each(p, &us122l->chip.midi_list)
 610                 snd_usbmidi_input_stop(p);
 611
 612         mutex_lock(&us122l->mutex);
 613         usb_stream_stop(&us122l->sk);
 614         mutex_unlock(&us122l->mutex);
 615
 616         return 0;
 617 }
 618
 619 static int snd_us122l_resume(struct usb_interface *intf)
 620 {
 621         struct snd_card *card;
 622         struct us122l *us122l;
 623         struct list_head *p;
 624         int err;
 625
 626         card = usb_get_intfdata(intf);
 627         if (!card)
 628                 return 0;
 629
 630         us122l = US122L(card);
 631         if (!us122l)
 632                 return 0;
 633
 634         mutex_lock(&us122l->mutex);
 635         /* needed, doesn't restart without: */
 636         err = usb_set_interface(us122l->chip.dev, 1, 1);
 637         if (err) {
 638                 snd_printk(KERN_ERR "usb_set_interface error \n");
 639                 goto unlock;
 640         }
 641
 642         pt_info_set(us122l->chip.dev, 0x11);
 643         pt_info_set(us122l->chip.dev, 0x10);
 644
 645         err = us122l_set_sample_rate(us122l->chip.dev,
 646                                      us122l->sk.s->cfg.sample_rate);
 647         if (err < 0) {
 648                 snd_printk(KERN_ERR "us122l_set_sample_rate error \n");
 649                 goto unlock;
 650         }
 651         err = usb_stream_start(&us122l->sk);
 652         if (err)
 653                 goto unlock;
 654
 655         list_for_each(p, &us122l->chip.midi_list)
 656                 snd_usbmidi_input_start(p);
 657 unlock:
 658         mutex_unlock(&us122l->mutex);
 659         snd_power_change_state(card, SNDRV_CTL_POWER_D0);
 660         return err;
 661 }
 662
 663 static struct usb_device_id snd_us122l_usb_id_table[] = {
 664         {
 665                 .match_flags =  USB_DEVICE_ID_MATCH_DEVICE,
 666                 .idVendor =     0x0644,
 667                 .idProduct =    USB_ID_US122L
 668         },
 669 /*      { */            /* US-144 maybe works when @USB1.1. Untested. */
 670 /*              .match_flags =  USB_DEVICE_ID_MATCH_DEVICE, */
 671 /*              .idVendor =     0x0644, */
 672 /*              .idProduct =    USB_ID_US144 */
 673 /*      }, */
 674         { /* terminator */ }
 675 };
 676
 677 MODULE_DEVICE_TABLE(usb, snd_us122l_usb_id_table);
 678 static struct usb_driver snd_us122l_usb_driver = {
 679         .name =         "snd-usb-us122l",
 680         .probe =        snd_us122l_probe,
 681         .disconnect =   snd_us122l_disconnect,
 682         .suspend =      snd_us122l_suspend,
 683         .resume =       snd_us122l_resume,
 684         .reset_resume = snd_us122l_resume,
 685         .id_table =     snd_us122l_usb_id_table,
 686         .supports_autosuspend = 1
 687 };
 688
 689
 690 static int __init snd_us122l_module_init(void)
 691 {
 692         return usb_register(&snd_us122l_usb_driver);
 693 }
 694
 695 static void __exit snd_us122l_module_exit(void)
 696 {
 697         usb_deregister(&snd_us122l_usb_driver);
 698 }
 699
 700 module_init(snd_us122l_module_init)
 701 module_exit(snd_us122l_module_exit)