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 /*
  86  * Wrapper for usb_control_msg().
  87  * Allocates a temp buffer to prevent dmaing from/to the stack.
  88  */
  89 static int us122l_ctl_msg(struct usb_device *dev, unsigned int pipe,
  90                           __u8 request, __u8 requesttype,
  91                           __u16 value, __u16 index, void *data,
  92                           __u16 size, int timeout)
  93 {
  94         int err;
  95         void *buf = NULL;
  96
  97         if (size > 0) {
  98                 buf = kmemdup(data, size, GFP_KERNEL);
  99                 if (!buf)
 100                         return -ENOMEM;
 101         }
 102         err = usb_control_msg(dev, pipe, request, requesttype,
 103                               value, index, buf, size, timeout);
 104         if (size > 0) {
 105                 memcpy(data, buf, size);
 106                 kfree(buf);
 107         }
 108         return err;
 109 }
 110
 111 static void pt_info_set(struct usb_device *dev, u8 v)
 112 {
 113         int ret;
 114
 115         ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 116                               'I',
 117                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 118                               v, 0, NULL, 0, 1000);
 119         snd_printdd(KERN_DEBUG "%i\n", ret);
 120 }
 121
 122 static void usb_stream_hwdep_vm_open(struct vm_area_struct *area)
 123 {
 124         struct us122l *us122l = area->vm_private_data;
 125         atomic_inc(&us122l->mmap_count);
 126         snd_printdd(KERN_DEBUG "%i\n", atomic_read(&us122l->mmap_count));
 127 }
 128
 129 static vm_fault_t usb_stream_hwdep_vm_fault(struct vm_fault *vmf)
 130 {
 131         unsigned long offset;
 132         struct page *page;
 133         void *vaddr;
 134         struct us122l *us122l = vmf->vma->vm_private_data;
 135         struct usb_stream *s;
 136
 137         mutex_lock(&us122l->mutex);
 138         s = us122l->sk.s;
 139         if (!s)
 140                 goto unlock;
 141
 142         offset = vmf->pgoff << PAGE_SHIFT;
 143         if (offset < PAGE_ALIGN(s->read_size))
 144                 vaddr = (char *)s + offset;
 145         else {
 146                 offset -= PAGE_ALIGN(s->read_size);
 147                 if (offset >= PAGE_ALIGN(s->write_size))
 148                         goto unlock;
 149
 150                 vaddr = us122l->sk.write_page + offset;
 151         }
 152         page = virt_to_page(vaddr);
 153
 154         get_page(page);
 155         mutex_unlock(&us122l->mutex);
 156
 157         vmf->page = page;
 158
 159         return 0;
 160 unlock:
 161         mutex_unlock(&us122l->mutex);
 162         return VM_FAULT_SIGBUS;
 163 }
 164
 165 static void usb_stream_hwdep_vm_close(struct vm_area_struct *area)
 166 {
 167         struct us122l *us122l = area->vm_private_data;
 168         atomic_dec(&us122l->mmap_count);
 169         snd_printdd(KERN_DEBUG "%i\n", atomic_read(&us122l->mmap_count));
 170 }
 171
 172 static const struct vm_operations_struct usb_stream_hwdep_vm_ops = {
 173         .open = usb_stream_hwdep_vm_open,
 174         .fault = usb_stream_hwdep_vm_fault,
 175         .close = usb_stream_hwdep_vm_close,
 176 };
 177
 178
 179 static int usb_stream_hwdep_open(struct snd_hwdep *hw, struct file *file)
 180 {
 181         struct us122l   *us122l = hw->private_data;
 182         struct usb_interface *iface;
 183         snd_printdd(KERN_DEBUG "%p %p\n", hw, file);
 184         if (hw->used >= 2)
 185                 return -EBUSY;
 186
 187         if (!us122l->first)
 188                 us122l->first = file;
 189
 190         if (us122l->is_us144) {
 191                 iface = usb_ifnum_to_if(us122l->dev, 0);
 192                 usb_autopm_get_interface(iface);
 193         }
 194         iface = usb_ifnum_to_if(us122l->dev, 1);
 195         usb_autopm_get_interface(iface);
 196         return 0;
 197 }
 198
 199 static int usb_stream_hwdep_release(struct snd_hwdep *hw, struct file *file)
 200 {
 201         struct us122l   *us122l = hw->private_data;
 202         struct usb_interface *iface;
 203         snd_printdd(KERN_DEBUG "%p %p\n", hw, file);
 204
 205         if (us122l->is_us144) {
 206                 iface = usb_ifnum_to_if(us122l->dev, 0);
 207                 usb_autopm_put_interface(iface);
 208         }
 209         iface = usb_ifnum_to_if(us122l->dev, 1);
 210         usb_autopm_put_interface(iface);
 211         if (us122l->first == file)
 212                 us122l->first = NULL;
 213         mutex_lock(&us122l->mutex);
 214         if (us122l->master == file)
 215                 us122l->master = us122l->slave;
 216
 217         us122l->slave = NULL;
 218         mutex_unlock(&us122l->mutex);
 219         return 0;
 220 }
 221
 222 static int usb_stream_hwdep_mmap(struct snd_hwdep *hw,
 223                                  struct file *filp, struct vm_area_struct *area)
 224 {
 225         unsigned long   size = area->vm_end - area->vm_start;
 226         struct us122l   *us122l = hw->private_data;
 227         unsigned long offset;
 228         struct usb_stream *s;
 229         int err = 0;
 230         bool read;
 231
 232         offset = area->vm_pgoff << PAGE_SHIFT;
 233         mutex_lock(&us122l->mutex);
 234         s = us122l->sk.s;
 235         read = offset < s->read_size;
 236         if (read && area->vm_flags & VM_WRITE) {
 237                 err = -EPERM;
 238                 goto out;
 239         }
 240         snd_printdd(KERN_DEBUG "%lu %u\n", size,
 241                     read ? s->read_size : s->write_size);
 242         /* if userspace tries to mmap beyond end of our buffer, fail */
 243         if (size > PAGE_ALIGN(read ? s->read_size : s->write_size)) {
 244                 snd_printk(KERN_WARNING "%lu > %u\n", size,
 245                            read ? s->read_size : s->write_size);
 246                 err = -EINVAL;
 247                 goto out;
 248         }
 249
 250         area->vm_ops = &usb_stream_hwdep_vm_ops;
 251         area->vm_flags |= VM_DONTDUMP;
 252         if (!read)
 253                 area->vm_flags |= VM_DONTEXPAND;
 254         area->vm_private_data = us122l;
 255         atomic_inc(&us122l->mmap_count);
 256 out:
 257         mutex_unlock(&us122l->mutex);
 258         return err;
 259 }
 260
 261 static __poll_t usb_stream_hwdep_poll(struct snd_hwdep *hw,
 262                                           struct file *file, poll_table *wait)
 263 {
 264         struct us122l   *us122l = hw->private_data;
 265         unsigned        *polled;
 266         __poll_t        mask;
 267
 268         poll_wait(file, &us122l->sk.sleep, wait);
 269
 270         mask = EPOLLIN | EPOLLOUT | EPOLLWRNORM | EPOLLERR;
 271         if (mutex_trylock(&us122l->mutex)) {
 272                 struct usb_stream *s = us122l->sk.s;
 273                 if (s && s->state == usb_stream_ready) {
 274                         if (us122l->first == file)
 275                                 polled = &s->periods_polled;
 276                         else
 277                                 polled = &us122l->second_periods_polled;
 278                         if (*polled != s->periods_done) {
 279                                 *polled = s->periods_done;
 280                                 mask = EPOLLIN | EPOLLOUT | EPOLLWRNORM;
 281                         } else
 282                                 mask = 0;
 283                 }
 284                 mutex_unlock(&us122l->mutex);
 285         }
 286         return mask;
 287 }
 288
 289 static void us122l_stop(struct us122l *us122l)
 290 {
 291         struct list_head *p;
 292         list_for_each(p, &us122l->midi_list)
 293                 snd_usbmidi_input_stop(p);
 294
 295         usb_stream_stop(&us122l->sk);
 296         usb_stream_free(&us122l->sk);
 297 }
 298
 299 static int us122l_set_sample_rate(struct usb_device *dev, int rate)
 300 {
 301         unsigned int ep = 0x81;
 302         unsigned char data[3];
 303         int err;
 304
 305         data[0] = rate;
 306         data[1] = rate >> 8;
 307         data[2] = rate >> 16;
 308         err = us122l_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC_SET_CUR,
 309                              USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
 310                              UAC_EP_CS_ATTR_SAMPLE_RATE << 8, ep, data, 3, 1000);
 311         if (err < 0)
 312                 snd_printk(KERN_ERR "%d: cannot set freq %d to ep 0x%x\n",
 313                            dev->devnum, rate, ep);
 314         return err;
 315 }
 316
 317 static bool us122l_start(struct us122l *us122l,
 318                          unsigned rate, unsigned period_frames)
 319 {
 320         struct list_head *p;
 321         int err;
 322         unsigned use_packsize = 0;
 323         bool success = false;
 324
 325         if (us122l->dev->speed == USB_SPEED_HIGH) {
 326                 /* The us-122l's descriptor defaults to iso max_packsize 78,
 327                    which isn't needed for samplerates <= 48000.
 328                    Lets save some memory:
 329                 */
 330                 switch (rate) {
 331                 case 44100:
 332                         use_packsize = 36;
 333                         break;
 334                 case 48000:
 335                         use_packsize = 42;
 336                         break;
 337                 case 88200:
 338                         use_packsize = 72;
 339                         break;
 340                 }
 341         }
 342         if (!usb_stream_new(&us122l->sk, us122l->dev, 1, 2,
 343                             rate, use_packsize, period_frames, 6))
 344                 goto out;
 345
 346         err = us122l_set_sample_rate(us122l->dev, rate);
 347         if (err < 0) {
 348                 us122l_stop(us122l);
 349                 snd_printk(KERN_ERR "us122l_set_sample_rate error \n");
 350                 goto out;
 351         }
 352         err = usb_stream_start(&us122l->sk);
 353         if (err < 0) {
 354                 us122l_stop(us122l);
 355                 snd_printk(KERN_ERR "us122l_start error %i \n", err);
 356                 goto out;
 357         }
 358         list_for_each(p, &us122l->midi_list)
 359                 snd_usbmidi_input_start(p);
 360         success = true;
 361 out:
 362         return success;
 363 }
 364
 365 static int usb_stream_hwdep_ioctl(struct snd_hwdep *hw, struct file *file,
 366                                   unsigned cmd, unsigned long arg)
 367 {
 368         struct usb_stream_config cfg;
 369         struct us122l *us122l = hw->private_data;
 370         struct usb_stream *s;
 371         unsigned min_period_frames;
 372         int err = 0;
 373         bool high_speed;
 374
 375         if (cmd != SNDRV_USB_STREAM_IOCTL_SET_PARAMS)
 376                 return -ENOTTY;
 377
 378         if (copy_from_user(&cfg, (void __user *)arg, sizeof(cfg)))
 379                 return -EFAULT;
 380
 381         if (cfg.version != USB_STREAM_INTERFACE_VERSION)
 382                 return -ENXIO;
 383
 384         high_speed = us122l->dev->speed == USB_SPEED_HIGH;
 385         if ((cfg.sample_rate != 44100 && cfg.sample_rate != 48000  &&
 386              (!high_speed ||
 387               (cfg.sample_rate != 88200 && cfg.sample_rate != 96000))) ||
 388             cfg.frame_size != 6 ||
 389             cfg.period_frames > 0x3000)
 390                 return -EINVAL;
 391
 392         switch (cfg.sample_rate) {
 393         case 44100:
 394                 min_period_frames = 48;
 395                 break;
 396         case 48000:
 397                 min_period_frames = 52;
 398                 break;
 399         default:
 400                 min_period_frames = 104;
 401                 break;
 402         }
 403         if (!high_speed)
 404                 min_period_frames <<= 1;
 405         if (cfg.period_frames < min_period_frames)
 406                 return -EINVAL;
 407
 408         snd_power_wait(hw->card, SNDRV_CTL_POWER_D0);
 409
 410         mutex_lock(&us122l->mutex);
 411         s = us122l->sk.s;
 412         if (!us122l->master)
 413                 us122l->master = file;
 414         else if (us122l->master != file) {
 415                 if (!s || memcmp(&cfg, &s->cfg, sizeof(cfg))) {
 416                         err = -EIO;
 417                         goto unlock;
 418                 }
 419                 us122l->slave = file;
 420         }
 421         if (!s || memcmp(&cfg, &s->cfg, sizeof(cfg)) ||
 422             s->state == usb_stream_xrun) {
 423                 us122l_stop(us122l);
 424                 if (!us122l_start(us122l, cfg.sample_rate, cfg.period_frames))
 425                         err = -EIO;
 426                 else
 427                         err = 1;
 428         }
 429 unlock:
 430         mutex_unlock(&us122l->mutex);
 431         wake_up_all(&us122l->sk.sleep);
 432         return err;
 433 }
 434
 435 #define SND_USB_STREAM_ID "USB STREAM"
 436 static int usb_stream_hwdep_new(struct snd_card *card)
 437 {
 438         int err;
 439         struct snd_hwdep *hw;
 440         struct usb_device *dev = US122L(card)->dev;
 441
 442         err = snd_hwdep_new(card, SND_USB_STREAM_ID, 0, &hw);
 443         if (err < 0)
 444                 return err;
 445
 446         hw->iface = SNDRV_HWDEP_IFACE_USB_STREAM;
 447         hw->private_data = US122L(card);
 448         hw->ops.open = usb_stream_hwdep_open;
 449         hw->ops.release = usb_stream_hwdep_release;
 450         hw->ops.ioctl = usb_stream_hwdep_ioctl;
 451         hw->ops.ioctl_compat = usb_stream_hwdep_ioctl;
 452         hw->ops.mmap = usb_stream_hwdep_mmap;
 453         hw->ops.poll = usb_stream_hwdep_poll;
 454
 455         sprintf(hw->name, "/dev/bus/usb/%03d/%03d/hwdeppcm",
 456                 dev->bus->busnum, dev->devnum);
 457         return 0;
 458 }
 459
 460
 461 static bool us122l_create_card(struct snd_card *card)
 462 {
 463         int err;
 464         struct us122l *us122l = US122L(card);
 465
 466         if (us122l->is_us144) {
 467                 err = usb_set_interface(us122l->dev, 0, 1);
 468                 if (err) {
 469                         snd_printk(KERN_ERR "usb_set_interface error \n");
 470                         return false;
 471                 }
 472         }
 473         err = usb_set_interface(us122l->dev, 1, 1);
 474         if (err) {
 475                 snd_printk(KERN_ERR "usb_set_interface error \n");
 476                 return false;
 477         }
 478
 479         pt_info_set(us122l->dev, 0x11);
 480         pt_info_set(us122l->dev, 0x10);
 481
 482         if (!us122l_start(us122l, 44100, 256))
 483                 return false;
 484
 485         if (us122l->is_us144)
 486                 err = us144_create_usbmidi(card);
 487         else
 488                 err = us122l_create_usbmidi(card);
 489         if (err < 0) {
 490                 snd_printk(KERN_ERR "us122l_create_usbmidi error %i \n", err);
 491                 goto stop;
 492         }
 493         err = usb_stream_hwdep_new(card);
 494         if (err < 0) {
 495 /* release the midi resources */
 496                 struct list_head *p;
 497                 list_for_each(p, &us122l->midi_list)
 498                         snd_usbmidi_disconnect(p);
 499
 500                 goto stop;
 501         }
 502         return true;
 503
 504 stop:
 505         us122l_stop(us122l);
 506         return false;
 507 }
 508
 509 static void snd_us122l_free(struct snd_card *card)
 510 {
 511         struct us122l   *us122l = US122L(card);
 512         int             index = us122l->card_index;
 513         if (index >= 0  &&  index < SNDRV_CARDS)
 514                 snd_us122l_card_used[index] = 0;
 515 }
 516
 517 static int usx2y_create_card(struct usb_device *device,
 518                              struct usb_interface *intf,
 519                              struct snd_card **cardp,
 520                              unsigned long flags)
 521 {
 522         int             dev;
 523         struct snd_card *card;
 524         int err;
 525
 526         for (dev = 0; dev < SNDRV_CARDS; ++dev)
 527                 if (enable[dev] && !snd_us122l_card_used[dev])
 528                         break;
 529         if (dev >= SNDRV_CARDS)
 530                 return -ENODEV;
 531         err = snd_card_new(&intf->dev, index[dev], id[dev], THIS_MODULE,
 532                            sizeof(struct us122l), &card);
 533         if (err < 0)
 534                 return err;
 535         snd_us122l_card_used[US122L(card)->card_index = dev] = 1;
 536         card->private_free = snd_us122l_free;
 537         US122L(card)->dev = device;
 538         mutex_init(&US122L(card)->mutex);
 539         init_waitqueue_head(&US122L(card)->sk.sleep);
 540         US122L(card)->is_us144 = flags & US122L_FLAG_US144;
 541         INIT_LIST_HEAD(&US122L(card)->midi_list);
 542         strcpy(card->driver, "USB "NAME_ALLCAPS"");
 543         sprintf(card->shortname, "TASCAM "NAME_ALLCAPS"");
 544         sprintf(card->longname, "%s (%x:%x if %d at %03d/%03d)",
 545                 card->shortname,
 546                 le16_to_cpu(device->descriptor.idVendor),
 547                 le16_to_cpu(device->descriptor.idProduct),
 548                 0,
 549                 US122L(card)->dev->bus->busnum,
 550                 US122L(card)->dev->devnum
 551                 );
 552         *cardp = card;
 553         return 0;
 554 }
 555
 556 static int us122l_usb_probe(struct usb_interface *intf,
 557                             const struct usb_device_id *device_id,
 558                             struct snd_card **cardp)
 559 {
 560         struct usb_device *device = interface_to_usbdev(intf);
 561         struct snd_card *card;
 562         int err;
 563
 564         err = usx2y_create_card(device, intf, &card, device_id->driver_info);
 565         if (err < 0)
 566                 return err;
 567
 568         if (!us122l_create_card(card)) {
 569                 snd_card_free(card);
 570                 return -EINVAL;
 571         }
 572
 573         err = snd_card_register(card);
 574         if (err < 0) {
 575                 snd_card_free(card);
 576                 return err;
 577         }
 578
 579         usb_get_intf(usb_ifnum_to_if(device, 0));
 580         usb_get_dev(device);
 581         *cardp = card;
 582         return 0;
 583 }
 584
 585 static int snd_us122l_probe(struct usb_interface *intf,
 586                             const struct usb_device_id *id)
 587 {
 588         struct usb_device *device = interface_to_usbdev(intf);
 589         struct snd_card *card;
 590         int err;
 591
 592         if (id->driver_info & US122L_FLAG_US144 &&
 593                         device->speed == USB_SPEED_HIGH) {
 594                 snd_printk(KERN_ERR "disable ehci-hcd to run US-144 \n");
 595                 return -ENODEV;
 596         }
 597
 598         snd_printdd(KERN_DEBUG"%p:%i\n",
 599                     intf, intf->cur_altsetting->desc.bInterfaceNumber);
 600         if (intf->cur_altsetting->desc.bInterfaceNumber != 1)
 601                 return 0;
 602
 603         err = us122l_usb_probe(usb_get_intf(intf), id, &card);
 604         if (err < 0) {
 605                 usb_put_intf(intf);
 606                 return err;
 607         }
 608
 609         usb_set_intfdata(intf, card);
 610         return 0;
 611 }
 612
 613 static void snd_us122l_disconnect(struct usb_interface *intf)
 614 {
 615         struct snd_card *card;
 616         struct us122l *us122l;
 617         struct list_head *p;
 618
 619         card = usb_get_intfdata(intf);
 620         if (!card)
 621                 return;
 622
 623         snd_card_disconnect(card);
 624
 625         us122l = US122L(card);
 626         mutex_lock(&us122l->mutex);
 627         us122l_stop(us122l);
 628         mutex_unlock(&us122l->mutex);
 629
 630 /* release the midi resources */
 631         list_for_each(p, &us122l->midi_list) {
 632                 snd_usbmidi_disconnect(p);
 633         }
 634
 635         usb_put_intf(usb_ifnum_to_if(us122l->dev, 0));
 636         usb_put_intf(usb_ifnum_to_if(us122l->dev, 1));
 637         usb_put_dev(us122l->dev);
 638
 639         while (atomic_read(&us122l->mmap_count))
 640                 msleep(500);
 641
 642         snd_card_free(card);
 643 }
 644
 645 static int snd_us122l_suspend(struct usb_interface *intf, pm_message_t message)
 646 {
 647         struct snd_card *card;
 648         struct us122l *us122l;
 649         struct list_head *p;
 650
 651         card = usb_get_intfdata(intf);
 652         if (!card)
 653                 return 0;
 654         snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
 655
 656         us122l = US122L(card);
 657         if (!us122l)
 658                 return 0;
 659
 660         list_for_each(p, &us122l->midi_list)
 661                 snd_usbmidi_input_stop(p);
 662
 663         mutex_lock(&us122l->mutex);
 664         usb_stream_stop(&us122l->sk);
 665         mutex_unlock(&us122l->mutex);
 666
 667         return 0;
 668 }
 669
 670 static int snd_us122l_resume(struct usb_interface *intf)
 671 {
 672         struct snd_card *card;
 673         struct us122l *us122l;
 674         struct list_head *p;
 675         int err;
 676
 677         card = usb_get_intfdata(intf);
 678         if (!card)
 679                 return 0;
 680
 681         us122l = US122L(card);
 682         if (!us122l)
 683                 return 0;
 684
 685         mutex_lock(&us122l->mutex);
 686         /* needed, doesn't restart without: */
 687         if (us122l->is_us144) {
 688                 err = usb_set_interface(us122l->dev, 0, 1);
 689                 if (err) {
 690                         snd_printk(KERN_ERR "usb_set_interface error \n");
 691                         goto unlock;
 692                 }
 693         }
 694         err = usb_set_interface(us122l->dev, 1, 1);
 695         if (err) {
 696                 snd_printk(KERN_ERR "usb_set_interface error \n");
 697                 goto unlock;
 698         }
 699
 700         pt_info_set(us122l->dev, 0x11);
 701         pt_info_set(us122l->dev, 0x10);
 702
 703         err = us122l_set_sample_rate(us122l->dev,
 704                                      us122l->sk.s->cfg.sample_rate);
 705         if (err < 0) {
 706                 snd_printk(KERN_ERR "us122l_set_sample_rate error \n");
 707                 goto unlock;
 708         }
 709         err = usb_stream_start(&us122l->sk);
 710         if (err)
 711                 goto unlock;
 712
 713         list_for_each(p, &us122l->midi_list)
 714                 snd_usbmidi_input_start(p);
 715 unlock:
 716         mutex_unlock(&us122l->mutex);
 717         snd_power_change_state(card, SNDRV_CTL_POWER_D0);
 718         return err;
 719 }
 720
 721 static const struct usb_device_id snd_us122l_usb_id_table[] = {
 722         {
 723                 .match_flags =  USB_DEVICE_ID_MATCH_DEVICE,
 724                 .idVendor =     0x0644,
 725                 .idProduct =    USB_ID_US122L
 726         },
 727         {       /* US-144 only works at USB1.1! Disable module ehci-hcd. */
 728                 .match_flags =  USB_DEVICE_ID_MATCH_DEVICE,
 729                 .idVendor =     0x0644,
 730                 .idProduct =    USB_ID_US144,
 731                 .driver_info =  US122L_FLAG_US144
 732         },
 733         {
 734                 .match_flags =  USB_DEVICE_ID_MATCH_DEVICE,
 735                 .idVendor =     0x0644,
 736                 .idProduct =    USB_ID_US122MKII
 737         },
 738         {
 739                 .match_flags =  USB_DEVICE_ID_MATCH_DEVICE,
 740                 .idVendor =     0x0644,
 741                 .idProduct =    USB_ID_US144MKII,
 742                 .driver_info =  US122L_FLAG_US144
 743         },
 744         { /* terminator */ }
 745 };
 746
 747 MODULE_DEVICE_TABLE(usb, snd_us122l_usb_id_table);
 748 static struct usb_driver snd_us122l_usb_driver = {
 749         .name =         "snd-usb-us122l",
 750         .probe =        snd_us122l_probe,
 751         .disconnect =   snd_us122l_disconnect,
 752         .suspend =      snd_us122l_suspend,
 753         .resume =       snd_us122l_resume,
 754         .reset_resume = snd_us122l_resume,
 755         .id_table =     snd_us122l_usb_id_table,
 756         .supports_autosuspend = 1
 757 };
 758
 759 module_usb_driver(snd_us122l_usb_driver);