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)->dev;
  63         struct usb_interface *iface = usb_ifnum_to_if(dev, 1);
  64
  65         return snd_usbmidi_create(card, iface,
  66                                   &US122L(card)->midi_list, &quirk);
  67 }
  68
  69 static int us144_create_usbmidi(struct snd_card *card)
  70 {
  71         static struct snd_usb_midi_endpoint_info quirk_data = {
  72                 .out_ep = 4,
  73                 .in_ep = 3,
  74                 .out_cables =   0x001,
  75                 .in_cables =    0x001
  76         };
  77         static struct snd_usb_audio_quirk quirk = {
  78                 .vendor_name =  "US144",
  79                 .product_name = NAME_ALLCAPS,
  80                 .ifnum =        0,
  81                 .type = QUIRK_MIDI_US122L,
  82                 .data = &quirk_data
  83         };
  84         struct usb_device *dev = US122L(card)->dev;
  85         struct usb_interface *iface = usb_ifnum_to_if(dev, 0);
  86
  87         return snd_usbmidi_create(card, iface,
  88                                   &US122L(card)->midi_list, &quirk);
  89 }
  90
  91 /*
  92  * Wrapper for usb_control_msg().
  93  * Allocates a temp buffer to prevent dmaing from/to the stack.
  94  */
  95 static int us122l_ctl_msg(struct usb_device *dev, unsigned int pipe,
  96                           __u8 request, __u8 requesttype,
  97                           __u16 value, __u16 index, void *data,
  98                           __u16 size, int timeout)
  99 {
 100         int err;
 101         void *buf = NULL;
 102
 103         if (size > 0) {
 104                 buf = kmemdup(data, size, GFP_KERNEL);
 105                 if (!buf)
 106                         return -ENOMEM;
 107         }
 108         err = usb_control_msg(dev, pipe, request, requesttype,
 109                               value, index, buf, size, timeout);
 110         if (size > 0) {
 111                 memcpy(data, buf, size);
 112                 kfree(buf);
 113         }
 114         return err;
 115 }
 116
 117 static void pt_info_set(struct usb_device *dev, u8 v)
 118 {
 119         int ret;
 120
 121         ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 122                               'I',
 123                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 124                               v, 0, NULL, 0, 1000);
 125         snd_printdd(KERN_DEBUG "%i\n", ret);
 126 }
 127
 128 static void usb_stream_hwdep_vm_open(struct vm_area_struct *area)
 129 {
 130         struct us122l *us122l = area->vm_private_data;
 131         atomic_inc(&us122l->mmap_count);
 132         snd_printdd(KERN_DEBUG "%i\n", atomic_read(&us122l->mmap_count));
 133 }
 134
 135 static int usb_stream_hwdep_vm_fault(struct vm_area_struct *area,
 136                                      struct vm_fault *vmf)
 137 {
 138         unsigned long offset;
 139         struct page *page;
 140         void *vaddr;
 141         struct us122l *us122l = area->vm_private_data;
 142         struct usb_stream *s;
 143
 144         mutex_lock(&us122l->mutex);
 145         s = us122l->sk.s;
 146         if (!s)
 147                 goto unlock;
 148
 149         offset = vmf->pgoff << PAGE_SHIFT;
 150         if (offset < PAGE_ALIGN(s->read_size))
 151                 vaddr = (char *)s + offset;
 152         else {
 153                 offset -= PAGE_ALIGN(s->read_size);
 154                 if (offset >= PAGE_ALIGN(s->write_size))
 155                         goto unlock;
 156
 157                 vaddr = us122l->sk.write_page + offset;
 158         }
 159         page = virt_to_page(vaddr);
 160
 161         get_page(page);
 162         mutex_unlock(&us122l->mutex);
 163
 164         vmf->page = page;
 165
 166         return 0;
 167 unlock:
 168         mutex_unlock(&us122l->mutex);
 169         return VM_FAULT_SIGBUS;
 170 }
 171
 172 static void usb_stream_hwdep_vm_close(struct vm_area_struct *area)
 173 {
 174         struct us122l *us122l = area->vm_private_data;
 175         atomic_dec(&us122l->mmap_count);
 176         snd_printdd(KERN_DEBUG "%i\n", atomic_read(&us122l->mmap_count));
 177 }
 178
 179 static const struct vm_operations_struct usb_stream_hwdep_vm_ops = {
 180         .open = usb_stream_hwdep_vm_open,
 181         .fault = usb_stream_hwdep_vm_fault,
 182         .close = usb_stream_hwdep_vm_close,
 183 };
 184
 185
 186 static int usb_stream_hwdep_open(struct snd_hwdep *hw, struct file *file)
 187 {
 188         struct us122l   *us122l = hw->private_data;
 189         struct usb_interface *iface;
 190         snd_printdd(KERN_DEBUG "%p %p\n", hw, file);
 191         if (hw->used >= 2)
 192                 return -EBUSY;
 193
 194         if (!us122l->first)
 195                 us122l->first = file;
 196
 197         if (us122l->dev->descriptor.idProduct == USB_ID_US144) {
 198                 iface = usb_ifnum_to_if(us122l->dev, 0);
 199                 usb_autopm_get_interface(iface);
 200         }
 201         iface = usb_ifnum_to_if(us122l->dev, 1);
 202         usb_autopm_get_interface(iface);
 203         return 0;
 204 }
 205
 206 static int usb_stream_hwdep_release(struct snd_hwdep *hw, struct file *file)
 207 {
 208         struct us122l   *us122l = hw->private_data;
 209         struct usb_interface *iface;
 210         snd_printdd(KERN_DEBUG "%p %p\n", hw, file);
 211
 212         if (us122l->dev->descriptor.idProduct == USB_ID_US144) {
 213                 iface = usb_ifnum_to_if(us122l->dev, 0);
 214                 usb_autopm_put_interface(iface);
 215         }
 216         iface = usb_ifnum_to_if(us122l->dev, 1);
 217         usb_autopm_put_interface(iface);
 218         if (us122l->first == file)
 219                 us122l->first = NULL;
 220         mutex_lock(&us122l->mutex);
 221         if (us122l->master == file)
 222                 us122l->master = us122l->slave;
 223
 224         us122l->slave = NULL;
 225         mutex_unlock(&us122l->mutex);
 226         return 0;
 227 }
 228
 229 static int usb_stream_hwdep_mmap(struct snd_hwdep *hw,
 230                                  struct file *filp, struct vm_area_struct *area)
 231 {
 232         unsigned long   size = area->vm_end - area->vm_start;
 233         struct us122l   *us122l = hw->private_data;
 234         unsigned long offset;
 235         struct usb_stream *s;
 236         int err = 0;
 237         bool read;
 238
 239         offset = area->vm_pgoff << PAGE_SHIFT;
 240         mutex_lock(&us122l->mutex);
 241         s = us122l->sk.s;
 242         read = offset < s->read_size;
 243         if (read && area->vm_flags & VM_WRITE) {
 244                 err = -EPERM;
 245                 goto out;
 246         }
 247         snd_printdd(KERN_DEBUG "%lu %u\n", size,
 248                     read ? s->read_size : s->write_size);
 249         /* if userspace tries to mmap beyond end of our buffer, fail */
 250         if (size > PAGE_ALIGN(read ? s->read_size : s->write_size)) {
 251                 snd_printk(KERN_WARNING "%lu > %u\n", size,
 252                            read ? s->read_size : s->write_size);
 253                 err = -EINVAL;
 254                 goto out;
 255         }
 256
 257         area->vm_ops = &usb_stream_hwdep_vm_ops;
 258         area->vm_flags |= VM_RESERVED;
 259         area->vm_private_data = us122l;
 260         atomic_inc(&us122l->mmap_count);
 261 out:
 262         mutex_unlock(&us122l->mutex);
 263         return err;
 264 }
 265
 266 static unsigned int usb_stream_hwdep_poll(struct snd_hwdep *hw,
 267                                           struct file *file, poll_table *wait)
 268 {
 269         struct us122l   *us122l = hw->private_data;
 270         struct usb_stream *s = us122l->sk.s;
 271         unsigned        *polled;
 272         unsigned int    mask;
 273
 274         poll_wait(file, &us122l->sk.sleep, wait);
 275
 276         switch (s->state) {
 277         case usb_stream_ready:
 278                 if (us122l->first == file)
 279                         polled = &s->periods_polled;
 280                 else
 281                         polled = &us122l->second_periods_polled;
 282                 if (*polled != s->periods_done) {
 283                         *polled = s->periods_done;
 284                         mask = POLLIN | POLLOUT | POLLWRNORM;
 285                         break;
 286                 }
 287                 /* Fall through */
 288                 mask = 0;
 289                 break;
 290         default:
 291                 mask = POLLIN | POLLOUT | POLLWRNORM | POLLERR;
 292                 break;
 293         }
 294         return mask;
 295 }
 296
 297 static void us122l_stop(struct us122l *us122l)
 298 {
 299         struct list_head *p;
 300         list_for_each(p, &us122l->midi_list)
 301                 snd_usbmidi_input_stop(p);
 302
 303         usb_stream_stop(&us122l->sk);
 304         usb_stream_free(&us122l->sk);
 305 }
 306
 307 static int us122l_set_sample_rate(struct usb_device *dev, int rate)
 308 {
 309         unsigned int ep = 0x81;
 310         unsigned char data[3];
 311         int err;
 312
 313         data[0] = rate;
 314         data[1] = rate >> 8;
 315         data[2] = rate >> 16;
 316         err = us122l_ctl_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR,
 317                              USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
 318                              SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000);
 319         if (err < 0)
 320                 snd_printk(KERN_ERR "%d: cannot set freq %d to ep 0x%x\n",
 321                            dev->devnum, rate, ep);
 322         return err;
 323 }
 324
 325 static bool us122l_start(struct us122l *us122l,
 326                          unsigned rate, unsigned period_frames)
 327 {
 328         struct list_head *p;
 329         int err;
 330         unsigned use_packsize = 0;
 331         bool success = false;
 332
 333         if (us122l->dev->speed == USB_SPEED_HIGH) {
 334                 /* The us-122l's descriptor defaults to iso max_packsize 78,
 335                    which isn't needed for samplerates <= 48000.
 336                    Lets save some memory:
 337                 */
 338                 switch (rate) {
 339                 case 44100:
 340                         use_packsize = 36;
 341                         break;
 342                 case 48000:
 343                         use_packsize = 42;
 344                         break;
 345                 case 88200:
 346                         use_packsize = 72;
 347                         break;
 348                 }
 349         }
 350         if (!usb_stream_new(&us122l->sk, us122l->dev, 1, 2,
 351                             rate, use_packsize, period_frames, 6))
 352                 goto out;
 353
 354         err = us122l_set_sample_rate(us122l->dev, rate);
 355         if (err < 0) {
 356                 us122l_stop(us122l);
 357                 snd_printk(KERN_ERR "us122l_set_sample_rate error \n");
 358                 goto out;
 359         }
 360         err = usb_stream_start(&us122l->sk);
 361         if (err < 0) {
 362                 us122l_stop(us122l);
 363                 snd_printk(KERN_ERR "us122l_start error %i \n", err);
 364                 goto out;
 365         }
 366         list_for_each(p, &us122l->midi_list)
 367                 snd_usbmidi_input_start(p);
 368         success = true;
 369 out:
 370         return success;
 371 }
 372
 373 static int usb_stream_hwdep_ioctl(struct snd_hwdep *hw, struct file *file,
 374                                   unsigned cmd, unsigned long arg)
 375 {
 376         struct usb_stream_config *cfg;
 377         struct us122l *us122l = hw->private_data;
 378         unsigned min_period_frames;
 379         int err = 0;
 380         bool high_speed;
 381
 382         if (cmd != SNDRV_USB_STREAM_IOCTL_SET_PARAMS)
 383                 return -ENOTTY;
 384
 385         cfg = memdup_user((void *)arg, sizeof(*cfg));
 386         if (IS_ERR(cfg))
 387                 return PTR_ERR(cfg);
 388
 389         if (cfg->version != USB_STREAM_INTERFACE_VERSION) {
 390                 err = -ENXIO;
 391                 goto free;
 392         }
 393         high_speed = us122l->dev->speed == USB_SPEED_HIGH;
 394         if ((cfg->sample_rate != 44100 && cfg->sample_rate != 48000  &&
 395              (!high_speed ||
 396               (cfg->sample_rate != 88200 && cfg->sample_rate != 96000))) ||
 397             cfg->frame_size != 6 ||
 398             cfg->period_frames > 0x3000) {
 399                 err = -EINVAL;
 400                 goto free;
 401         }
 402         switch (cfg->sample_rate) {
 403         case 44100:
 404                 min_period_frames = 48;
 405                 break;
 406         case 48000:
 407                 min_period_frames = 52;
 408                 break;
 409         default:
 410                 min_period_frames = 104;
 411                 break;
 412         }
 413         if (!high_speed)
 414                 min_period_frames <<= 1;
 415         if (cfg->period_frames < min_period_frames) {
 416                 err = -EINVAL;
 417                 goto free;
 418         }
 419
 420         snd_power_wait(hw->card, SNDRV_CTL_POWER_D0);
 421
 422         mutex_lock(&us122l->mutex);
 423         if (!us122l->master)
 424                 us122l->master = file;
 425         else if (us122l->master != file) {
 426                 if (memcmp(cfg, &us122l->sk.s->cfg, sizeof(*cfg))) {
 427                         err = -EIO;
 428                         goto unlock;
 429                 }
 430                 us122l->slave = file;
 431         }
 432         if (!us122l->sk.s ||
 433             memcmp(cfg, &us122l->sk.s->cfg, sizeof(*cfg)) ||
 434             us122l->sk.s->state == usb_stream_xrun) {
 435                 us122l_stop(us122l);
 436                 if (!us122l_start(us122l, cfg->sample_rate, cfg->period_frames))
 437                         err = -EIO;
 438                 else
 439                         err = 1;
 440         }
 441 unlock:
 442         mutex_unlock(&us122l->mutex);
 443 free:
 444         kfree(cfg);
 445         return err;
 446 }
 447
 448 #define SND_USB_STREAM_ID "USB STREAM"
 449 static int usb_stream_hwdep_new(struct snd_card *card)
 450 {
 451         int err;
 452         struct snd_hwdep *hw;
 453         struct usb_device *dev = US122L(card)->dev;
 454
 455         err = snd_hwdep_new(card, SND_USB_STREAM_ID, 0, &hw);
 456         if (err < 0)
 457                 return err;
 458
 459         hw->iface = SNDRV_HWDEP_IFACE_USB_STREAM;
 460         hw->private_data = US122L(card);
 461         hw->ops.open = usb_stream_hwdep_open;
 462         hw->ops.release = usb_stream_hwdep_release;
 463         hw->ops.ioctl = usb_stream_hwdep_ioctl;
 464         hw->ops.ioctl_compat = usb_stream_hwdep_ioctl;
 465         hw->ops.mmap = usb_stream_hwdep_mmap;
 466         hw->ops.poll = usb_stream_hwdep_poll;
 467
 468         sprintf(hw->name, "/proc/bus/usb/%03d/%03d/hwdeppcm",
 469                 dev->bus->busnum, dev->devnum);
 470         return 0;
 471 }
 472
 473
 474 static bool us122l_create_card(struct snd_card *card)
 475 {
 476         int err;
 477         struct us122l *us122l = US122L(card);
 478
 479         if (us122l->dev->descriptor.idProduct == USB_ID_US144) {
 480                 err = usb_set_interface(us122l->dev, 0, 1);
 481                 if (err) {
 482                         snd_printk(KERN_ERR "usb_set_interface error \n");
 483                         return false;
 484                 }
 485         }
 486         err = usb_set_interface(us122l->dev, 1, 1);
 487         if (err) {
 488                 snd_printk(KERN_ERR "usb_set_interface error \n");
 489                 return false;
 490         }
 491
 492         pt_info_set(us122l->dev, 0x11);
 493         pt_info_set(us122l->dev, 0x10);
 494
 495         if (!us122l_start(us122l, 44100, 256))
 496                 return false;
 497
 498         if (us122l->dev->descriptor.idProduct == USB_ID_US144)
 499                 err = us144_create_usbmidi(card);
 500         else
 501                 err = us122l_create_usbmidi(card);
 502         if (err < 0) {
 503                 snd_printk(KERN_ERR "us122l_create_usbmidi error %i \n", err);
 504                 us122l_stop(us122l);
 505                 return false;
 506         }
 507         err = usb_stream_hwdep_new(card);
 508         if (err < 0) {
 509 /* release the midi resources */
 510                 struct list_head *p;
 511                 list_for_each(p, &us122l->midi_list)
 512                         snd_usbmidi_disconnect(p);
 513
 514                 us122l_stop(us122l);
 515                 return false;
 516         }
 517         return true;
 518 }
 519
 520 static void snd_us122l_free(struct snd_card *card)
 521 {
 522         struct us122l   *us122l = US122L(card);
 523         int             index = us122l->card_index;
 524         if (index >= 0  &&  index < SNDRV_CARDS)
 525                 snd_us122l_card_used[index] = 0;
 526 }
 527
 528 static int usx2y_create_card(struct usb_device *device, struct snd_card **cardp)
 529 {
 530         int             dev;
 531         struct snd_card *card;
 532         int err;
 533
 534         for (dev = 0; dev < SNDRV_CARDS; ++dev)
 535                 if (enable[dev] && !snd_us122l_card_used[dev])
 536                         break;
 537         if (dev >= SNDRV_CARDS)
 538                 return -ENODEV;
 539         err = snd_card_create(index[dev], id[dev], THIS_MODULE,
 540                               sizeof(struct us122l), &card);
 541         if (err < 0)
 542                 return err;
 543         snd_us122l_card_used[US122L(card)->card_index = dev] = 1;
 544         card->private_free = snd_us122l_free;
 545         US122L(card)->dev = device;
 546         mutex_init(&US122L(card)->mutex);
 547         init_waitqueue_head(&US122L(card)->sk.sleep);
 548         INIT_LIST_HEAD(&US122L(card)->midi_list);
 549         strcpy(card->driver, "USB "NAME_ALLCAPS"");
 550         sprintf(card->shortname, "TASCAM "NAME_ALLCAPS"");
 551         sprintf(card->longname, "%s (%x:%x if %d at %03d/%03d)",
 552                 card->shortname,
 553                 le16_to_cpu(device->descriptor.idVendor),
 554                 le16_to_cpu(device->descriptor.idProduct),
 555                 0,
 556                 US122L(card)->dev->bus->busnum,
 557                 US122L(card)->dev->devnum
 558                 );
 559         *cardp = card;
 560         return 0;
 561 }
 562
 563 static int us122l_usb_probe(struct usb_interface *intf,
 564                             const struct usb_device_id *device_id,
 565                             struct snd_card **cardp)
 566 {
 567         struct usb_device *device = interface_to_usbdev(intf);
 568         struct snd_card *card;
 569         int err;
 570
 571         err = usx2y_create_card(device, &card);
 572         if (err < 0)
 573                 return err;
 574
 575         snd_card_set_dev(card, &intf->dev);
 576         if (!us122l_create_card(card)) {
 577                 snd_card_free(card);
 578                 return -EINVAL;
 579         }
 580
 581         err = snd_card_register(card);
 582         if (err < 0) {
 583                 snd_card_free(card);
 584                 return err;
 585         }
 586
 587         usb_get_intf(usb_ifnum_to_if(device, 0));
 588         usb_get_dev(device);
 589         *cardp = card;
 590         return 0;
 591 }
 592
 593 static int snd_us122l_probe(struct usb_interface *intf,
 594                             const struct usb_device_id *id)
 595 {
 596         struct usb_device *device = interface_to_usbdev(intf);
 597         struct snd_card *card;
 598         int err;
 599
 600         if (device->descriptor.idProduct == USB_ID_US144
 601                 && device->speed == USB_SPEED_HIGH) {
 602                 snd_printk(KERN_ERR "disable ehci-hcd to run US-144 \n");
 603                 return -ENODEV;
 604         }
 605
 606         snd_printdd(KERN_DEBUG"%p:%i\n",
 607                     intf, intf->cur_altsetting->desc.bInterfaceNumber);
 608         if (intf->cur_altsetting->desc.bInterfaceNumber != 1)
 609                 return 0;
 610
 611         err = us122l_usb_probe(usb_get_intf(intf), id, &card);
 612         if (err < 0) {
 613                 usb_put_intf(intf);
 614                 return err;
 615         }
 616
 617         usb_set_intfdata(intf, card);
 618         return 0;
 619 }
 620
 621 static void snd_us122l_disconnect(struct usb_interface *intf)
 622 {
 623         struct snd_card *card;
 624         struct us122l *us122l;
 625         struct list_head *p;
 626
 627         card = usb_get_intfdata(intf);
 628         if (!card)
 629                 return;
 630
 631         snd_card_disconnect(card);
 632
 633         us122l = US122L(card);
 634         mutex_lock(&us122l->mutex);
 635         us122l_stop(us122l);
 636         mutex_unlock(&us122l->mutex);
 637
 638 /* release the midi resources */
 639         list_for_each(p, &us122l->midi_list) {
 640                 snd_usbmidi_disconnect(p);
 641         }
 642
 643         usb_put_intf(usb_ifnum_to_if(us122l->dev, 0));
 644         usb_put_intf(usb_ifnum_to_if(us122l->dev, 1));
 645         usb_put_dev(us122l->dev);
 646
 647         while (atomic_read(&us122l->mmap_count))
 648                 msleep(500);
 649
 650         snd_card_free(card);
 651 }
 652
 653 static int snd_us122l_suspend(struct usb_interface *intf, pm_message_t message)
 654 {
 655         struct snd_card *card;
 656         struct us122l *us122l;
 657         struct list_head *p;
 658
 659         card = usb_get_intfdata(intf);
 660         if (!card)
 661                 return 0;
 662         snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
 663
 664         us122l = US122L(card);
 665         if (!us122l)
 666                 return 0;
 667
 668         list_for_each(p, &us122l->midi_list)
 669                 snd_usbmidi_input_stop(p);
 670
 671         mutex_lock(&us122l->mutex);
 672         usb_stream_stop(&us122l->sk);
 673         mutex_unlock(&us122l->mutex);
 674
 675         return 0;
 676 }
 677
 678 static int snd_us122l_resume(struct usb_interface *intf)
 679 {
 680         struct snd_card *card;
 681         struct us122l *us122l;
 682         struct list_head *p;
 683         int err;
 684
 685         card = usb_get_intfdata(intf);
 686         if (!card)
 687                 return 0;
 688
 689         us122l = US122L(card);
 690         if (!us122l)
 691                 return 0;
 692
 693         mutex_lock(&us122l->mutex);
 694         /* needed, doesn't restart without: */
 695         if (us122l->dev->descriptor.idProduct == USB_ID_US144) {
 696                 err = usb_set_interface(us122l->dev, 0, 1);
 697                 if (err) {
 698                         snd_printk(KERN_ERR "usb_set_interface error \n");
 699                         goto unlock;
 700                 }
 701         }
 702         err = usb_set_interface(us122l->dev, 1, 1);
 703         if (err) {
 704                 snd_printk(KERN_ERR "usb_set_interface error \n");
 705                 goto unlock;
 706         }
 707
 708         pt_info_set(us122l->dev, 0x11);
 709         pt_info_set(us122l->dev, 0x10);
 710
 711         err = us122l_set_sample_rate(us122l->dev,
 712                                      us122l->sk.s->cfg.sample_rate);
 713         if (err < 0) {
 714                 snd_printk(KERN_ERR "us122l_set_sample_rate error \n");
 715                 goto unlock;
 716         }
 717         err = usb_stream_start(&us122l->sk);
 718         if (err)
 719                 goto unlock;
 720
 721         list_for_each(p, &us122l->midi_list)
 722                 snd_usbmidi_input_start(p);
 723 unlock:
 724         mutex_unlock(&us122l->mutex);
 725         snd_power_change_state(card, SNDRV_CTL_POWER_D0);
 726         return err;
 727 }
 728
 729 static struct usb_device_id snd_us122l_usb_id_table[] = {
 730         {
 731                 .match_flags =  USB_DEVICE_ID_MATCH_DEVICE,
 732                 .idVendor =     0x0644,
 733                 .idProduct =    USB_ID_US122L
 734         },
 735         {       /* US-144 only works at USB1.1! Disable module ehci-hcd. */
 736                 .match_flags =  USB_DEVICE_ID_MATCH_DEVICE,
 737                 .idVendor =     0x0644,
 738                 .idProduct =    USB_ID_US144
 739         },
 740         { /* terminator */ }
 741 };
 742
 743 MODULE_DEVICE_TABLE(usb, snd_us122l_usb_id_table);
 744 static struct usb_driver snd_us122l_usb_driver = {
 745         .name =         "snd-usb-us122l",
 746         .probe =        snd_us122l_probe,
 747         .disconnect =   snd_us122l_disconnect,
 748         .suspend =      snd_us122l_suspend,
 749         .resume =       snd_us122l_resume,
 750         .reset_resume = snd_us122l_resume,
 751         .id_table =     snd_us122l_usb_id_table,
 752         .supports_autosuspend = 1
 753 };
 754
 755
 756 static int __init snd_us122l_module_init(void)
 757 {
 758         return usb_register(&snd_us122l_usb_driver);
 759 }
 760
 761 static void __exit snd_us122l_module_exit(void)
 762 {
 763         usb_deregister(&snd_us122l_usb_driver);
 764 }
 765
 766 module_init(snd_us122l_module_init)
 767 module_exit(snd_us122l_module_exit)