sound/usb/usx2y/us122l.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Copyright (C) 2007, 2008 Karsten Wiese <fzu@wemgehoertderstaat.de>
   4  */
   5
   6 #include <linux/slab.h>
   7 #include <linux/usb.h>
   8 #include <linux/usb/audio.h>
   9 #include <linux/module.h>
  10 #include <sound/core.h>
  11 #include <sound/hwdep.h>
  12 #include <sound/pcm.h>
  13 #include <sound/initval.h>
  14 #define MODNAME "US122L"
  15 #include "usb_stream.c"
  16 #include "../usbaudio.h"
  17 #include "../midi.h"
  18 #include "us122l.h"
  19
  20 MODULE_AUTHOR("Karsten Wiese <fzu@wemgehoertderstaat.de>");
  21 MODULE_DESCRIPTION("TASCAM "NAME_ALLCAPS" Version 0.5");
  22 MODULE_LICENSE("GPL");
  23
  24 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;      /* Index 0-max */
  25 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* Id for this card */
  26                                                         /* Enable this card */
  27 static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
  28
  29 module_param_array(index, int, NULL, 0444);
  30 MODULE_PARM_DESC(index, "Index value for "NAME_ALLCAPS".");
  31 module_param_array(id, charp, NULL, 0444);
  32 MODULE_PARM_DESC(id, "ID string for "NAME_ALLCAPS".");
  33 module_param_array(enable, bool, NULL, 0444);
  34 MODULE_PARM_DESC(enable, "Enable "NAME_ALLCAPS".");
  35
  36 /* driver_info flags */
  37 #define US122L_FLAG_US144       BIT(0)
  38
  39 static int snd_us122l_card_used[SNDRV_CARDS];
  40
  41 static int us122l_create_usbmidi(struct snd_card *card)
  42 {
  43         static const struct snd_usb_midi_endpoint_info quirk_data = {
  44                 .out_ep = 4,
  45                 .in_ep = 3,
  46                 .out_cables =   0x001,
  47                 .in_cables =    0x001
  48         };
  49         static const struct snd_usb_audio_quirk quirk = {
  50                 .vendor_name =  "US122L",
  51                 .product_name = NAME_ALLCAPS,
  52                 .ifnum =        1,
  53                 .type = QUIRK_MIDI_US122L,
  54                 .data = &quirk_data
  55         };
  56         struct usb_device *dev = US122L(card)->dev;
  57         struct usb_interface *iface = usb_ifnum_to_if(dev, 1);
  58
  59         return snd_usbmidi_create(card, iface,
  60                                   &US122L(card)->midi_list, &quirk);
  61 }
  62
  63 static int us144_create_usbmidi(struct snd_card *card)
  64 {
  65         static const struct snd_usb_midi_endpoint_info quirk_data = {
  66                 .out_ep = 4,
  67                 .in_ep = 3,
  68                 .out_cables =   0x001,
  69                 .in_cables =    0x001
  70         };
  71         static const struct snd_usb_audio_quirk quirk = {
  72                 .vendor_name =  "US144",
  73                 .product_name = NAME_ALLCAPS,
  74                 .ifnum =        0,
  75                 .type = QUIRK_MIDI_US122L,
  76                 .data = &quirk_data
  77         };
  78         struct usb_device *dev = US122L(card)->dev;
  79         struct usb_interface *iface = usb_ifnum_to_if(dev, 0);
  80
  81         return snd_usbmidi_create(card, iface,
  82                                   &US122L(card)->midi_list, &quirk);
  83 }
  84
  85 static void pt_info_set(struct usb_device *dev, u8 v)
  86 {
  87         int ret;
  88
  89         ret = usb_control_msg_send(dev, 0, 'I',
  90                                    USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
  91                                    v, 0, NULL, 0, 1000, GFP_NOIO);
  92         snd_printdd(KERN_DEBUG "%i\n", ret);
  93 }
  94
  95 static void usb_stream_hwdep_vm_open(struct vm_area_struct *area)
  96 {
  97         struct us122l *us122l = area->vm_private_data;
  98         atomic_inc(&us122l->mmap_count);
  99         snd_printdd(KERN_DEBUG "%i\n", atomic_read(&us122l->mmap_count));
 100 }
 101
 102 static vm_fault_t usb_stream_hwdep_vm_fault(struct vm_fault *vmf)
 103 {
 104         unsigned long offset;
 105         struct page *page;
 106         void *vaddr;
 107         struct us122l *us122l = vmf->vma->vm_private_data;
 108         struct usb_stream *s;
 109
 110         mutex_lock(&us122l->mutex);
 111         s = us122l->sk.s;
 112         if (!s)
 113                 goto unlock;
 114
 115         offset = vmf->pgoff << PAGE_SHIFT;
 116         if (offset < PAGE_ALIGN(s->read_size))
 117                 vaddr = (char *)s + offset;
 118         else {
 119                 offset -= PAGE_ALIGN(s->read_size);
 120                 if (offset >= PAGE_ALIGN(s->write_size))
 121                         goto unlock;
 122
 123                 vaddr = us122l->sk.write_page + offset;
 124         }
 125         page = virt_to_page(vaddr);
 126
 127         get_page(page);
 128         mutex_unlock(&us122l->mutex);
 129
 130         vmf->page = page;
 131
 132         return 0;
 133 unlock:
 134         mutex_unlock(&us122l->mutex);
 135         return VM_FAULT_SIGBUS;
 136 }
 137
 138 static void usb_stream_hwdep_vm_close(struct vm_area_struct *area)
 139 {
 140         struct us122l *us122l = area->vm_private_data;
 141         atomic_dec(&us122l->mmap_count);
 142         snd_printdd(KERN_DEBUG "%i\n", atomic_read(&us122l->mmap_count));
 143 }
 144
 145 static const struct vm_operations_struct usb_stream_hwdep_vm_ops = {
 146         .open = usb_stream_hwdep_vm_open,
 147         .fault = usb_stream_hwdep_vm_fault,
 148         .close = usb_stream_hwdep_vm_close,
 149 };
 150
 151
 152 static int usb_stream_hwdep_open(struct snd_hwdep *hw, struct file *file)
 153 {
 154         struct us122l   *us122l = hw->private_data;
 155         struct usb_interface *iface;
 156         snd_printdd(KERN_DEBUG "%p %p\n", hw, file);
 157         if (hw->used >= 2)
 158                 return -EBUSY;
 159
 160         if (!us122l->first)
 161                 us122l->first = file;
 162
 163         if (us122l->is_us144) {
 164                 iface = usb_ifnum_to_if(us122l->dev, 0);
 165                 usb_autopm_get_interface(iface);
 166         }
 167         iface = usb_ifnum_to_if(us122l->dev, 1);
 168         usb_autopm_get_interface(iface);
 169         return 0;
 170 }
 171
 172 static int usb_stream_hwdep_release(struct snd_hwdep *hw, struct file *file)
 173 {
 174         struct us122l   *us122l = hw->private_data;
 175         struct usb_interface *iface;
 176         snd_printdd(KERN_DEBUG "%p %p\n", hw, file);
 177
 178         if (us122l->is_us144) {
 179                 iface = usb_ifnum_to_if(us122l->dev, 0);
 180                 usb_autopm_put_interface(iface);
 181         }
 182         iface = usb_ifnum_to_if(us122l->dev, 1);
 183         usb_autopm_put_interface(iface);
 184         if (us122l->first == file)
 185                 us122l->first = NULL;
 186         mutex_lock(&us122l->mutex);
 187         if (us122l->master == file)
 188                 us122l->master = us122l->slave;
 189
 190         us122l->slave = NULL;
 191         mutex_unlock(&us122l->mutex);
 192         return 0;
 193 }
 194
 195 static int usb_stream_hwdep_mmap(struct snd_hwdep *hw,
 196                                  struct file *filp, struct vm_area_struct *area)
 197 {
 198         unsigned long   size = area->vm_end - area->vm_start;
 199         struct us122l   *us122l = hw->private_data;
 200         unsigned long offset;
 201         struct usb_stream *s;
 202         int err = 0;
 203         bool read;
 204
 205         offset = area->vm_pgoff << PAGE_SHIFT;
 206         mutex_lock(&us122l->mutex);
 207         s = us122l->sk.s;
 208         read = offset < s->read_size;
 209         if (read && area->vm_flags & VM_WRITE) {
 210                 err = -EPERM;
 211                 goto out;
 212         }
 213         snd_printdd(KERN_DEBUG "%lu %u\n", size,
 214                     read ? s->read_size : s->write_size);
 215         /* if userspace tries to mmap beyond end of our buffer, fail */
 216         if (size > PAGE_ALIGN(read ? s->read_size : s->write_size)) {
 217                 snd_printk(KERN_WARNING "%lu > %u\n", size,
 218                            read ? s->read_size : s->write_size);
 219                 err = -EINVAL;
 220                 goto out;
 221         }
 222
 223         area->vm_ops = &usb_stream_hwdep_vm_ops;
 224         area->vm_flags |= VM_DONTDUMP;
 225         if (!read)
 226                 area->vm_flags |= VM_DONTEXPAND;
 227         area->vm_private_data = us122l;
 228         atomic_inc(&us122l->mmap_count);
 229 out:
 230         mutex_unlock(&us122l->mutex);
 231         return err;
 232 }
 233
 234 static __poll_t usb_stream_hwdep_poll(struct snd_hwdep *hw,
 235                                           struct file *file, poll_table *wait)
 236 {
 237         struct us122l   *us122l = hw->private_data;
 238         unsigned        *polled;
 239         __poll_t        mask;
 240
 241         poll_wait(file, &us122l->sk.sleep, wait);
 242
 243         mask = EPOLLIN | EPOLLOUT | EPOLLWRNORM | EPOLLERR;
 244         if (mutex_trylock(&us122l->mutex)) {
 245                 struct usb_stream *s = us122l->sk.s;
 246                 if (s && s->state == usb_stream_ready) {
 247                         if (us122l->first == file)
 248                                 polled = &s->periods_polled;
 249                         else
 250                                 polled = &us122l->second_periods_polled;
 251                         if (*polled != s->periods_done) {
 252                                 *polled = s->periods_done;
 253                                 mask = EPOLLIN | EPOLLOUT | EPOLLWRNORM;
 254                         } else
 255                                 mask = 0;
 256                 }
 257                 mutex_unlock(&us122l->mutex);
 258         }
 259         return mask;
 260 }
 261
 262 static void us122l_stop(struct us122l *us122l)
 263 {
 264         struct list_head *p;
 265         list_for_each(p, &us122l->midi_list)
 266                 snd_usbmidi_input_stop(p);
 267
 268         usb_stream_stop(&us122l->sk);
 269         usb_stream_free(&us122l->sk);
 270 }
 271
 272 static int us122l_set_sample_rate(struct usb_device *dev, int rate)
 273 {
 274         unsigned int ep = 0x81;
 275         unsigned char data[3];
 276         int err;
 277
 278         data[0] = rate;
 279         data[1] = rate >> 8;
 280         data[2] = rate >> 16;
 281         err = usb_control_msg_send(dev, 0, UAC_SET_CUR,
 282                                    USB_TYPE_CLASS | USB_RECIP_ENDPOINT | USB_DIR_OUT,
 283                                    UAC_EP_CS_ATTR_SAMPLE_RATE << 8, ep, data, 3,
 284                                    1000, GFP_NOIO);
 285         if (err)
 286                 snd_printk(KERN_ERR "%d: cannot set freq %d to ep 0x%x\n",
 287                            dev->devnum, rate, ep);
 288         return err;
 289 }
 290
 291 static bool us122l_start(struct us122l *us122l,
 292                          unsigned rate, unsigned period_frames)
 293 {
 294         struct list_head *p;
 295         int err;
 296         unsigned use_packsize = 0;
 297         bool success = false;
 298
 299         if (us122l->dev->speed == USB_SPEED_HIGH) {
 300                 /* The us-122l's descriptor defaults to iso max_packsize 78,
 301                    which isn't needed for samplerates <= 48000.
 302                    Lets save some memory:
 303                 */
 304                 switch (rate) {
 305                 case 44100:
 306                         use_packsize = 36;
 307                         break;
 308                 case 48000:
 309                         use_packsize = 42;
 310                         break;
 311                 case 88200:
 312                         use_packsize = 72;
 313                         break;
 314                 }
 315         }
 316         if (!usb_stream_new(&us122l->sk, us122l->dev, 1, 2,
 317                             rate, use_packsize, period_frames, 6))
 318                 goto out;
 319
 320         err = us122l_set_sample_rate(us122l->dev, rate);
 321         if (err < 0) {
 322                 us122l_stop(us122l);
 323                 snd_printk(KERN_ERR "us122l_set_sample_rate error \n");
 324                 goto out;
 325         }
 326         err = usb_stream_start(&us122l->sk);
 327         if (err < 0) {
 328                 us122l_stop(us122l);
 329                 snd_printk(KERN_ERR "us122l_start error %i \n", err);
 330                 goto out;
 331         }
 332         list_for_each(p, &us122l->midi_list)
 333                 snd_usbmidi_input_start(p);
 334         success = true;
 335 out:
 336         return success;
 337 }
 338
 339 static int usb_stream_hwdep_ioctl(struct snd_hwdep *hw, struct file *file,
 340                                   unsigned cmd, unsigned long arg)
 341 {
 342         struct usb_stream_config cfg;
 343         struct us122l *us122l = hw->private_data;
 344         struct usb_stream *s;
 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         if (copy_from_user(&cfg, (void __user *)arg, sizeof(cfg)))
 353                 return -EFAULT;
 354
 355         if (cfg.version != USB_STREAM_INTERFACE_VERSION)
 356                 return -ENXIO;
 357
 358         high_speed = us122l->dev->speed == USB_SPEED_HIGH;
 359         if ((cfg.sample_rate != 44100 && cfg.sample_rate != 48000  &&
 360              (!high_speed ||
 361               (cfg.sample_rate != 88200 && cfg.sample_rate != 96000))) ||
 362             cfg.frame_size != 6 ||
 363             cfg.period_frames > 0x3000)
 364                 return -EINVAL;
 365
 366         switch (cfg.sample_rate) {
 367         case 44100:
 368                 min_period_frames = 48;
 369                 break;
 370         case 48000:
 371                 min_period_frames = 52;
 372                 break;
 373         default:
 374                 min_period_frames = 104;
 375                 break;
 376         }
 377         if (!high_speed)
 378                 min_period_frames <<= 1;
 379         if (cfg.period_frames < min_period_frames)
 380                 return -EINVAL;
 381
 382         snd_power_wait(hw->card);
 383
 384         mutex_lock(&us122l->mutex);
 385         s = us122l->sk.s;
 386         if (!us122l->master)
 387                 us122l->master = file;
 388         else if (us122l->master != file) {
 389                 if (!s || memcmp(&cfg, &s->cfg, sizeof(cfg))) {
 390                         err = -EIO;
 391                         goto unlock;
 392                 }
 393                 us122l->slave = file;
 394         }
 395         if (!s || memcmp(&cfg, &s->cfg, sizeof(cfg)) ||
 396             s->state == usb_stream_xrun) {
 397                 us122l_stop(us122l);
 398                 if (!us122l_start(us122l, cfg.sample_rate, cfg.period_frames))
 399                         err = -EIO;
 400                 else
 401                         err = 1;
 402         }
 403 unlock:
 404         mutex_unlock(&us122l->mutex);
 405         wake_up_all(&us122l->sk.sleep);
 406         return err;
 407 }
 408
 409 #define SND_USB_STREAM_ID "USB STREAM"
 410 static int usb_stream_hwdep_new(struct snd_card *card)
 411 {
 412         int err;
 413         struct snd_hwdep *hw;
 414         struct usb_device *dev = US122L(card)->dev;
 415
 416         err = snd_hwdep_new(card, SND_USB_STREAM_ID, 0, &hw);
 417         if (err < 0)
 418                 return err;
 419
 420         hw->iface = SNDRV_HWDEP_IFACE_USB_STREAM;
 421         hw->private_data = US122L(card);
 422         hw->ops.open = usb_stream_hwdep_open;
 423         hw->ops.release = usb_stream_hwdep_release;
 424         hw->ops.ioctl = usb_stream_hwdep_ioctl;
 425         hw->ops.ioctl_compat = usb_stream_hwdep_ioctl;
 426         hw->ops.mmap = usb_stream_hwdep_mmap;
 427         hw->ops.poll = usb_stream_hwdep_poll;
 428
 429         sprintf(hw->name, "/dev/bus/usb/%03d/%03d/hwdeppcm",
 430                 dev->bus->busnum, dev->devnum);
 431         return 0;
 432 }
 433
 434
 435 static bool us122l_create_card(struct snd_card *card)
 436 {
 437         int err;
 438         struct us122l *us122l = US122L(card);
 439
 440         if (us122l->is_us144) {
 441                 err = usb_set_interface(us122l->dev, 0, 1);
 442                 if (err) {
 443                         snd_printk(KERN_ERR "usb_set_interface error \n");
 444                         return false;
 445                 }
 446         }
 447         err = usb_set_interface(us122l->dev, 1, 1);
 448         if (err) {
 449                 snd_printk(KERN_ERR "usb_set_interface error \n");
 450                 return false;
 451         }
 452
 453         pt_info_set(us122l->dev, 0x11);
 454         pt_info_set(us122l->dev, 0x10);
 455
 456         if (!us122l_start(us122l, 44100, 256))
 457                 return false;
 458
 459         if (us122l->is_us144)
 460                 err = us144_create_usbmidi(card);
 461         else
 462                 err = us122l_create_usbmidi(card);
 463         if (err < 0) {
 464                 snd_printk(KERN_ERR "us122l_create_usbmidi error %i \n", err);
 465                 goto stop;
 466         }
 467         err = usb_stream_hwdep_new(card);
 468         if (err < 0) {
 469 /* release the midi resources */
 470                 struct list_head *p;
 471                 list_for_each(p, &us122l->midi_list)
 472                         snd_usbmidi_disconnect(p);
 473
 474                 goto stop;
 475         }
 476         return true;
 477
 478 stop:
 479         us122l_stop(us122l);
 480         return false;
 481 }
 482
 483 static void snd_us122l_free(struct snd_card *card)
 484 {
 485         struct us122l   *us122l = US122L(card);
 486         int             index = us122l->card_index;
 487         if (index >= 0  &&  index < SNDRV_CARDS)
 488                 snd_us122l_card_used[index] = 0;
 489 }
 490
 491 static int usx2y_create_card(struct usb_device *device,
 492                              struct usb_interface *intf,
 493                              struct snd_card **cardp,
 494                              unsigned long flags)
 495 {
 496         int             dev;
 497         struct snd_card *card;
 498         int err;
 499
 500         for (dev = 0; dev < SNDRV_CARDS; ++dev)
 501                 if (enable[dev] && !snd_us122l_card_used[dev])
 502                         break;
 503         if (dev >= SNDRV_CARDS)
 504                 return -ENODEV;
 505         err = snd_card_new(&intf->dev, index[dev], id[dev], THIS_MODULE,
 506                            sizeof(struct us122l), &card);
 507         if (err < 0)
 508                 return err;
 509         snd_us122l_card_used[US122L(card)->card_index = dev] = 1;
 510         card->private_free = snd_us122l_free;
 511         US122L(card)->dev = device;
 512         mutex_init(&US122L(card)->mutex);
 513         init_waitqueue_head(&US122L(card)->sk.sleep);
 514         US122L(card)->is_us144 = flags & US122L_FLAG_US144;
 515         INIT_LIST_HEAD(&US122L(card)->midi_list);
 516         strcpy(card->driver, "USB "NAME_ALLCAPS"");
 517         sprintf(card->shortname, "TASCAM "NAME_ALLCAPS"");
 518         sprintf(card->longname, "%s (%x:%x if %d at %03d/%03d)",
 519                 card->shortname,
 520                 le16_to_cpu(device->descriptor.idVendor),
 521                 le16_to_cpu(device->descriptor.idProduct),
 522                 0,
 523                 US122L(card)->dev->bus->busnum,
 524                 US122L(card)->dev->devnum
 525                 );
 526         *cardp = card;
 527         return 0;
 528 }
 529
 530 static int us122l_usb_probe(struct usb_interface *intf,
 531                             const struct usb_device_id *device_id,
 532                             struct snd_card **cardp)
 533 {
 534         struct usb_device *device = interface_to_usbdev(intf);
 535         struct snd_card *card;
 536         int err;
 537
 538         err = usx2y_create_card(device, intf, &card, device_id->driver_info);
 539         if (err < 0)
 540                 return err;
 541
 542         if (!us122l_create_card(card)) {
 543                 snd_card_free(card);
 544                 return -EINVAL;
 545         }
 546
 547         err = snd_card_register(card);
 548         if (err < 0) {
 549                 snd_card_free(card);
 550                 return err;
 551         }
 552
 553         usb_get_intf(usb_ifnum_to_if(device, 0));
 554         usb_get_dev(device);
 555         *cardp = card;
 556         return 0;
 557 }
 558
 559 static int snd_us122l_probe(struct usb_interface *intf,
 560                             const struct usb_device_id *id)
 561 {
 562         struct usb_device *device = interface_to_usbdev(intf);
 563         struct snd_card *card;
 564         int err;
 565
 566         if (id->driver_info & US122L_FLAG_US144 &&
 567                         device->speed == USB_SPEED_HIGH) {
 568                 snd_printk(KERN_ERR "disable ehci-hcd to run US-144 \n");
 569                 return -ENODEV;
 570         }
 571
 572         snd_printdd(KERN_DEBUG"%p:%i\n",
 573                     intf, intf->cur_altsetting->desc.bInterfaceNumber);
 574         if (intf->cur_altsetting->desc.bInterfaceNumber != 1)
 575                 return 0;
 576
 577         err = us122l_usb_probe(usb_get_intf(intf), id, &card);
 578         if (err < 0) {
 579                 usb_put_intf(intf);
 580                 return err;
 581         }
 582
 583         usb_set_intfdata(intf, card);
 584         return 0;
 585 }
 586
 587 static void snd_us122l_disconnect(struct usb_interface *intf)
 588 {
 589         struct snd_card *card;
 590         struct us122l *us122l;
 591         struct list_head *p;
 592
 593         card = usb_get_intfdata(intf);
 594         if (!card)
 595                 return;
 596
 597         snd_card_disconnect(card);
 598
 599         us122l = US122L(card);
 600         mutex_lock(&us122l->mutex);
 601         us122l_stop(us122l);
 602         mutex_unlock(&us122l->mutex);
 603
 604 /* release the midi resources */
 605         list_for_each(p, &us122l->midi_list) {
 606                 snd_usbmidi_disconnect(p);
 607         }
 608
 609         usb_put_intf(usb_ifnum_to_if(us122l->dev, 0));
 610         usb_put_intf(usb_ifnum_to_if(us122l->dev, 1));
 611         usb_put_dev(us122l->dev);
 612
 613         while (atomic_read(&us122l->mmap_count))
 614                 msleep(500);
 615
 616         snd_card_free(card);
 617 }
 618
 619 static int snd_us122l_suspend(struct usb_interface *intf, pm_message_t message)
 620 {
 621         struct snd_card *card;
 622         struct us122l *us122l;
 623         struct list_head *p;
 624
 625         card = usb_get_intfdata(intf);
 626         if (!card)
 627                 return 0;
 628         snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
 629
 630         us122l = US122L(card);
 631         if (!us122l)
 632                 return 0;
 633
 634         list_for_each(p, &us122l->midi_list)
 635                 snd_usbmidi_input_stop(p);
 636
 637         mutex_lock(&us122l->mutex);
 638         usb_stream_stop(&us122l->sk);
 639         mutex_unlock(&us122l->mutex);
 640
 641         return 0;
 642 }
 643
 644 static int snd_us122l_resume(struct usb_interface *intf)
 645 {
 646         struct snd_card *card;
 647         struct us122l *us122l;
 648         struct list_head *p;
 649         int err;
 650
 651         card = usb_get_intfdata(intf);
 652         if (!card)
 653                 return 0;
 654
 655         us122l = US122L(card);
 656         if (!us122l)
 657                 return 0;
 658
 659         mutex_lock(&us122l->mutex);
 660         /* needed, doesn't restart without: */
 661         if (us122l->is_us144) {
 662                 err = usb_set_interface(us122l->dev, 0, 1);
 663                 if (err) {
 664                         snd_printk(KERN_ERR "usb_set_interface error \n");
 665                         goto unlock;
 666                 }
 667         }
 668         err = usb_set_interface(us122l->dev, 1, 1);
 669         if (err) {
 670                 snd_printk(KERN_ERR "usb_set_interface error \n");
 671                 goto unlock;
 672         }
 673
 674         pt_info_set(us122l->dev, 0x11);
 675         pt_info_set(us122l->dev, 0x10);
 676
 677         err = us122l_set_sample_rate(us122l->dev,
 678                                      us122l->sk.s->cfg.sample_rate);
 679         if (err < 0) {
 680                 snd_printk(KERN_ERR "us122l_set_sample_rate error \n");
 681                 goto unlock;
 682         }
 683         err = usb_stream_start(&us122l->sk);
 684         if (err)
 685                 goto unlock;
 686
 687         list_for_each(p, &us122l->midi_list)
 688                 snd_usbmidi_input_start(p);
 689 unlock:
 690         mutex_unlock(&us122l->mutex);
 691         snd_power_change_state(card, SNDRV_CTL_POWER_D0);
 692         return err;
 693 }
 694
 695 static const struct usb_device_id snd_us122l_usb_id_table[] = {
 696         {
 697                 .match_flags =  USB_DEVICE_ID_MATCH_DEVICE,
 698                 .idVendor =     0x0644,
 699                 .idProduct =    USB_ID_US122L
 700         },
 701         {       /* US-144 only works at USB1.1! Disable module ehci-hcd. */
 702                 .match_flags =  USB_DEVICE_ID_MATCH_DEVICE,
 703                 .idVendor =     0x0644,
 704                 .idProduct =    USB_ID_US144,
 705                 .driver_info =  US122L_FLAG_US144
 706         },
 707         {
 708                 .match_flags =  USB_DEVICE_ID_MATCH_DEVICE,
 709                 .idVendor =     0x0644,
 710                 .idProduct =    USB_ID_US122MKII
 711         },
 712         {
 713                 .match_flags =  USB_DEVICE_ID_MATCH_DEVICE,
 714                 .idVendor =     0x0644,
 715                 .idProduct =    USB_ID_US144MKII,
 716                 .driver_info =  US122L_FLAG_US144
 717         },
 718         { /* terminator */ }
 719 };
 720
 721 MODULE_DEVICE_TABLE(usb, snd_us122l_usb_id_table);
 722 static struct usb_driver snd_us122l_usb_driver = {
 723         .name =         "snd-usb-us122l",
 724         .probe =        snd_us122l_probe,
 725         .disconnect =   snd_us122l_disconnect,
 726         .suspend =      snd_us122l_suspend,
 727         .resume =       snd_us122l_resume,
 728         .reset_resume = snd_us122l_resume,
 729         .id_table =     snd_us122l_usb_id_table,
 730         .supports_autosuspend = 1
 731 };
 732
 733 module_usb_driver(snd_us122l_usb_driver);