Version:  2.0.40 2.2.26 2.4.37 2.6.39 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15

Linux/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 <linux/slab.h>
 20 #include <linux/usb.h>
 21 #include <linux/usb/audio.h>
 22 #include <linux/module.h>
 23 #include <sound/core.h>
 24 #include <sound/hwdep.h>
 25 #include <sound/pcm.h>
 26 #include <sound/initval.h>
 27 #define MODNAME "US122L"
 28 #include "usb_stream.c"
 29 #include "../usbaudio.h"
 30 #include "../midi.h"
 31 #include "us122l.h"
 32 
 33 MODULE_AUTHOR("Karsten Wiese <fzu@wemgehoertderstaat.de>");
 34 MODULE_DESCRIPTION("TASCAM "NAME_ALLCAPS" Version 0.5");
 35 MODULE_LICENSE("GPL");
 36 
 37 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;      /* Index 0-max */
 38 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* Id for this card */
 39                                                         /* Enable this card */
 40 static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
 41 
 42 module_param_array(index, int, NULL, 0444);
 43 MODULE_PARM_DESC(index, "Index value for "NAME_ALLCAPS".");
 44 module_param_array(id, charp, NULL, 0444);
 45 MODULE_PARM_DESC(id, "ID string for "NAME_ALLCAPS".");
 46 module_param_array(enable, bool, NULL, 0444);
 47 MODULE_PARM_DESC(enable, "Enable "NAME_ALLCAPS".");
 48 
 49 static int snd_us122l_card_used[SNDRV_CARDS];
 50 
 51 
 52 static int us122l_create_usbmidi(struct snd_card *card)
 53 {
 54         static struct snd_usb_midi_endpoint_info quirk_data = {
 55                 .out_ep = 4,
 56                 .in_ep = 3,
 57                 .out_cables =   0x001,
 58                 .in_cables =    0x001
 59         };
 60         static struct snd_usb_audio_quirk quirk = {
 61                 .vendor_name =  "US122L",
 62                 .product_name = NAME_ALLCAPS,
 63                 .ifnum =        1,
 64                 .type = QUIRK_MIDI_US122L,
 65                 .data = &quirk_data
 66         };
 67         struct usb_device *dev = US122L(card)->dev;
 68         struct usb_interface *iface = usb_ifnum_to_if(dev, 1);
 69 
 70         return snd_usbmidi_create(card, iface,
 71                                   &US122L(card)->midi_list, &quirk);
 72 }
 73 
 74 static int us144_create_usbmidi(struct snd_card *card)
 75 {
 76         static struct snd_usb_midi_endpoint_info quirk_data = {
 77                 .out_ep = 4,
 78                 .in_ep = 3,
 79                 .out_cables =   0x001,
 80                 .in_cables =    0x001
 81         };
 82         static struct snd_usb_audio_quirk quirk = {
 83                 .vendor_name =  "US144",
 84                 .product_name = NAME_ALLCAPS,
 85                 .ifnum =        0,
 86                 .type = QUIRK_MIDI_US122L,
 87                 .data = &quirk_data
 88         };
 89         struct usb_device *dev = US122L(card)->dev;
 90         struct usb_interface *iface = usb_ifnum_to_if(dev, 0);
 91 
 92         return snd_usbmidi_create(card, iface,
 93                                   &US122L(card)->midi_list, &quirk);
 94 }
 95 
 96 /*
 97  * Wrapper for usb_control_msg().
 98  * Allocates a temp buffer to prevent dmaing from/to the stack.
 99  */
100 static int us122l_ctl_msg(struct usb_device *dev, unsigned int pipe,
101                           __u8 request, __u8 requesttype,
102                           __u16 value, __u16 index, void *data,
103                           __u16 size, int timeout)
104 {
105         int err;
106         void *buf = NULL;
107 
108         if (size > 0) {
109                 buf = kmemdup(data, size, GFP_KERNEL);
110                 if (!buf)
111                         return -ENOMEM;
112         }
113         err = usb_control_msg(dev, pipe, request, requesttype,
114                               value, index, buf, size, timeout);
115         if (size > 0) {
116                 memcpy(data, buf, size);
117                 kfree(buf);
118         }
119         return err;
120 }
121 
122 static void pt_info_set(struct usb_device *dev, u8 v)
123 {
124         int ret;
125 
126         ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
127                               'I',
128                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
129                               v, 0, NULL, 0, 1000);
130         snd_printdd(KERN_DEBUG "%i\n", ret);
131 }
132 
133 static void usb_stream_hwdep_vm_open(struct vm_area_struct *area)
134 {
135         struct us122l *us122l = area->vm_private_data;
136         atomic_inc(&us122l->mmap_count);
137         snd_printdd(KERN_DEBUG "%i\n", atomic_read(&us122l->mmap_count));
138 }
139 
140 static int usb_stream_hwdep_vm_fault(struct vm_area_struct *area,
141                                      struct vm_fault *vmf)
142 {
143         unsigned long offset;
144         struct page *page;
145         void *vaddr;
146         struct us122l *us122l = area->vm_private_data;
147         struct usb_stream *s;
148 
149         mutex_lock(&us122l->mutex);
150         s = us122l->sk.s;
151         if (!s)
152                 goto unlock;
153 
154         offset = vmf->pgoff << PAGE_SHIFT;
155         if (offset < PAGE_ALIGN(s->read_size))
156                 vaddr = (char *)s + offset;
157         else {
158                 offset -= PAGE_ALIGN(s->read_size);
159                 if (offset >= PAGE_ALIGN(s->write_size))
160                         goto unlock;
161 
162                 vaddr = us122l->sk.write_page + offset;
163         }
164         page = virt_to_page(vaddr);
165 
166         get_page(page);
167         mutex_unlock(&us122l->mutex);
168 
169         vmf->page = page;
170 
171         return 0;
172 unlock:
173         mutex_unlock(&us122l->mutex);
174         return VM_FAULT_SIGBUS;
175 }
176 
177 static void usb_stream_hwdep_vm_close(struct vm_area_struct *area)
178 {
179         struct us122l *us122l = area->vm_private_data;
180         atomic_dec(&us122l->mmap_count);
181         snd_printdd(KERN_DEBUG "%i\n", atomic_read(&us122l->mmap_count));
182 }
183 
184 static const struct vm_operations_struct usb_stream_hwdep_vm_ops = {
185         .open = usb_stream_hwdep_vm_open,
186         .fault = usb_stream_hwdep_vm_fault,
187         .close = usb_stream_hwdep_vm_close,
188 };
189 
190 
191 static int usb_stream_hwdep_open(struct snd_hwdep *hw, struct file *file)
192 {
193         struct us122l   *us122l = hw->private_data;
194         struct usb_interface *iface;
195         snd_printdd(KERN_DEBUG "%p %p\n", hw, file);
196         if (hw->used >= 2)
197                 return -EBUSY;
198 
199         if (!us122l->first)
200                 us122l->first = file;
201 
202         if (us122l->dev->descriptor.idProduct == USB_ID_US144 ||
203             us122l->dev->descriptor.idProduct == USB_ID_US144MKII) {
204                 iface = usb_ifnum_to_if(us122l->dev, 0);
205                 usb_autopm_get_interface(iface);
206         }
207         iface = usb_ifnum_to_if(us122l->dev, 1);
208         usb_autopm_get_interface(iface);
209         return 0;
210 }
211 
212 static int usb_stream_hwdep_release(struct snd_hwdep *hw, struct file *file)
213 {
214         struct us122l   *us122l = hw->private_data;
215         struct usb_interface *iface;
216         snd_printdd(KERN_DEBUG "%p %p\n", hw, file);
217 
218         if (us122l->dev->descriptor.idProduct == USB_ID_US144 ||
219             us122l->dev->descriptor.idProduct == USB_ID_US144MKII) {
220                 iface = usb_ifnum_to_if(us122l->dev, 0);
221                 usb_autopm_put_interface(iface);
222         }
223         iface = usb_ifnum_to_if(us122l->dev, 1);
224         usb_autopm_put_interface(iface);
225         if (us122l->first == file)
226                 us122l->first = NULL;
227         mutex_lock(&us122l->mutex);
228         if (us122l->master == file)
229                 us122l->master = us122l->slave;
230 
231         us122l->slave = NULL;
232         mutex_unlock(&us122l->mutex);
233         return 0;
234 }
235 
236 static int usb_stream_hwdep_mmap(struct snd_hwdep *hw,
237                                  struct file *filp, struct vm_area_struct *area)
238 {
239         unsigned long   size = area->vm_end - area->vm_start;
240         struct us122l   *us122l = hw->private_data;
241         unsigned long offset;
242         struct usb_stream *s;
243         int err = 0;
244         bool read;
245 
246         offset = area->vm_pgoff << PAGE_SHIFT;
247         mutex_lock(&us122l->mutex);
248         s = us122l->sk.s;
249         read = offset < s->read_size;
250         if (read && area->vm_flags & VM_WRITE) {
251                 err = -EPERM;
252                 goto out;
253         }
254         snd_printdd(KERN_DEBUG "%lu %u\n", size,
255                     read ? s->read_size : s->write_size);
256         /* if userspace tries to mmap beyond end of our buffer, fail */
257         if (size > PAGE_ALIGN(read ? s->read_size : s->write_size)) {
258                 snd_printk(KERN_WARNING "%lu > %u\n", size,
259                            read ? s->read_size : s->write_size);
260                 err = -EINVAL;
261                 goto out;
262         }
263 
264         area->vm_ops = &usb_stream_hwdep_vm_ops;
265         area->vm_flags |= VM_DONTDUMP;
266         if (!read)
267                 area->vm_flags |= VM_DONTEXPAND;
268         area->vm_private_data = us122l;
269         atomic_inc(&us122l->mmap_count);
270 out:
271         mutex_unlock(&us122l->mutex);
272         return err;
273 }
274 
275 static unsigned int usb_stream_hwdep_poll(struct snd_hwdep *hw,
276                                           struct file *file, poll_table *wait)
277 {
278         struct us122l   *us122l = hw->private_data;
279         unsigned        *polled;
280         unsigned int    mask;
281 
282         poll_wait(file, &us122l->sk.sleep, wait);
283 
284         mask = POLLIN | POLLOUT | POLLWRNORM | POLLERR;
285         if (mutex_trylock(&us122l->mutex)) {
286                 struct usb_stream *s = us122l->sk.s;
287                 if (s && s->state == usb_stream_ready) {
288                         if (us122l->first == file)
289                                 polled = &s->periods_polled;
290                         else
291                                 polled = &us122l->second_periods_polled;
292                         if (*polled != s->periods_done) {
293                                 *polled = s->periods_done;
294                                 mask = POLLIN | POLLOUT | POLLWRNORM;
295                         } else
296                                 mask = 0;
297                 }
298                 mutex_unlock(&us122l->mutex);
299         }
300         return mask;
301 }
302 
303 static void us122l_stop(struct us122l *us122l)
304 {
305         struct list_head *p;
306         list_for_each(p, &us122l->midi_list)
307                 snd_usbmidi_input_stop(p);
308 
309         usb_stream_stop(&us122l->sk);
310         usb_stream_free(&us122l->sk);
311 }
312 
313 static int us122l_set_sample_rate(struct usb_device *dev, int rate)
314 {
315         unsigned int ep = 0x81;
316         unsigned char data[3];
317         int err;
318 
319         data[0] = rate;
320         data[1] = rate >> 8;
321         data[2] = rate >> 16;
322         err = us122l_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC_SET_CUR,
323                              USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
324                              UAC_EP_CS_ATTR_SAMPLE_RATE << 8, ep, data, 3, 1000);
325         if (err < 0)
326                 snd_printk(KERN_ERR "%d: cannot set freq %d to ep 0x%x\n",
327                            dev->devnum, rate, ep);
328         return err;
329 }
330 
331 static bool us122l_start(struct us122l *us122l,
332                          unsigned rate, unsigned period_frames)
333 {
334         struct list_head *p;
335         int err;
336         unsigned use_packsize = 0;
337         bool success = false;
338 
339         if (us122l->dev->speed == USB_SPEED_HIGH) {
340                 /* The us-122l's descriptor defaults to iso max_packsize 78,
341                    which isn't needed for samplerates <= 48000.
342                    Lets save some memory:
343                 */
344                 switch (rate) {
345                 case 44100:
346                         use_packsize = 36;
347                         break;
348                 case 48000:
349                         use_packsize = 42;
350                         break;
351                 case 88200:
352                         use_packsize = 72;
353                         break;
354                 }
355         }
356         if (!usb_stream_new(&us122l->sk, us122l->dev, 1, 2,
357                             rate, use_packsize, period_frames, 6))
358                 goto out;
359 
360         err = us122l_set_sample_rate(us122l->dev, rate);
361         if (err < 0) {
362                 us122l_stop(us122l);
363                 snd_printk(KERN_ERR "us122l_set_sample_rate error \n");
364                 goto out;
365         }
366         err = usb_stream_start(&us122l->sk);
367         if (err < 0) {
368                 us122l_stop(us122l);
369                 snd_printk(KERN_ERR "us122l_start error %i \n", err);
370                 goto out;
371         }
372         list_for_each(p, &us122l->midi_list)
373                 snd_usbmidi_input_start(p);
374         success = true;
375 out:
376         return success;
377 }
378 
379 static int usb_stream_hwdep_ioctl(struct snd_hwdep *hw, struct file *file,
380                                   unsigned cmd, unsigned long arg)
381 {
382         struct usb_stream_config *cfg;
383         struct us122l *us122l = hw->private_data;
384         struct usb_stream *s;
385         unsigned min_period_frames;
386         int err = 0;
387         bool high_speed;
388 
389         if (cmd != SNDRV_USB_STREAM_IOCTL_SET_PARAMS)
390                 return -ENOTTY;
391 
392         cfg = memdup_user((void *)arg, sizeof(*cfg));
393         if (IS_ERR(cfg))
394                 return PTR_ERR(cfg);
395 
396         if (cfg->version != USB_STREAM_INTERFACE_VERSION) {
397                 err = -ENXIO;
398                 goto free;
399         }
400         high_speed = us122l->dev->speed == USB_SPEED_HIGH;
401         if ((cfg->sample_rate != 44100 && cfg->sample_rate != 48000  &&
402              (!high_speed ||
403               (cfg->sample_rate != 88200 && cfg->sample_rate != 96000))) ||
404             cfg->frame_size != 6 ||
405             cfg->period_frames > 0x3000) {
406                 err = -EINVAL;
407                 goto free;
408         }
409         switch (cfg->sample_rate) {
410         case 44100:
411                 min_period_frames = 48;
412                 break;
413         case 48000:
414                 min_period_frames = 52;
415                 break;
416         default:
417                 min_period_frames = 104;
418                 break;
419         }
420         if (!high_speed)
421                 min_period_frames <<= 1;
422         if (cfg->period_frames < min_period_frames) {
423                 err = -EINVAL;
424                 goto free;
425         }
426 
427         snd_power_wait(hw->card, SNDRV_CTL_POWER_D0);
428 
429         mutex_lock(&us122l->mutex);
430         s = us122l->sk.s;
431         if (!us122l->master)
432                 us122l->master = file;
433         else if (us122l->master != file) {
434                 if (!s || memcmp(cfg, &s->cfg, sizeof(*cfg))) {
435                         err = -EIO;
436                         goto unlock;
437                 }
438                 us122l->slave = file;
439         }
440         if (!s || memcmp(cfg, &s->cfg, sizeof(*cfg)) ||
441             s->state == usb_stream_xrun) {
442                 us122l_stop(us122l);
443                 if (!us122l_start(us122l, cfg->sample_rate, cfg->period_frames))
444                         err = -EIO;
445                 else
446                         err = 1;
447         }
448 unlock:
449         mutex_unlock(&us122l->mutex);
450 free:
451         kfree(cfg);
452         wake_up_all(&us122l->sk.sleep);
453         return err;
454 }
455 
456 #define SND_USB_STREAM_ID "USB STREAM"
457 static int usb_stream_hwdep_new(struct snd_card *card)
458 {
459         int err;
460         struct snd_hwdep *hw;
461         struct usb_device *dev = US122L(card)->dev;
462 
463         err = snd_hwdep_new(card, SND_USB_STREAM_ID, 0, &hw);
464         if (err < 0)
465                 return err;
466 
467         hw->iface = SNDRV_HWDEP_IFACE_USB_STREAM;
468         hw->private_data = US122L(card);
469         hw->ops.open = usb_stream_hwdep_open;
470         hw->ops.release = usb_stream_hwdep_release;
471         hw->ops.ioctl = usb_stream_hwdep_ioctl;
472         hw->ops.ioctl_compat = usb_stream_hwdep_ioctl;
473         hw->ops.mmap = usb_stream_hwdep_mmap;
474         hw->ops.poll = usb_stream_hwdep_poll;
475 
476         sprintf(hw->name, "/proc/bus/usb/%03d/%03d/hwdeppcm",
477                 dev->bus->busnum, dev->devnum);
478         return 0;
479 }
480 
481 
482 static bool us122l_create_card(struct snd_card *card)
483 {
484         int err;
485         struct us122l *us122l = US122L(card);
486 
487         if (us122l->dev->descriptor.idProduct == USB_ID_US144 ||
488             us122l->dev->descriptor.idProduct == USB_ID_US144MKII) {
489                 err = usb_set_interface(us122l->dev, 0, 1);
490                 if (err) {
491                         snd_printk(KERN_ERR "usb_set_interface error \n");
492                         return false;
493                 }
494         }
495         err = usb_set_interface(us122l->dev, 1, 1);
496         if (err) {
497                 snd_printk(KERN_ERR "usb_set_interface error \n");
498                 return false;
499         }
500 
501         pt_info_set(us122l->dev, 0x11);
502         pt_info_set(us122l->dev, 0x10);
503 
504         if (!us122l_start(us122l, 44100, 256))
505                 return false;
506 
507         if (us122l->dev->descriptor.idProduct == USB_ID_US144 ||
508             us122l->dev->descriptor.idProduct == USB_ID_US144MKII)
509                 err = us144_create_usbmidi(card);
510         else
511                 err = us122l_create_usbmidi(card);
512         if (err < 0) {
513                 snd_printk(KERN_ERR "us122l_create_usbmidi error %i \n", err);
514                 us122l_stop(us122l);
515                 return false;
516         }
517         err = usb_stream_hwdep_new(card);
518         if (err < 0) {
519 /* release the midi resources */
520                 struct list_head *p;
521                 list_for_each(p, &us122l->midi_list)
522                         snd_usbmidi_disconnect(p);
523 
524                 us122l_stop(us122l);
525                 return false;
526         }
527         return true;
528 }
529 
530 static void snd_us122l_free(struct snd_card *card)
531 {
532         struct us122l   *us122l = US122L(card);
533         int             index = us122l->card_index;
534         if (index >= 0  &&  index < SNDRV_CARDS)
535                 snd_us122l_card_used[index] = 0;
536 }
537 
538 static int usx2y_create_card(struct usb_device *device,
539                              struct usb_interface *intf,
540                              struct snd_card **cardp)
541 {
542         int             dev;
543         struct snd_card *card;
544         int err;
545 
546         for (dev = 0; dev < SNDRV_CARDS; ++dev)
547                 if (enable[dev] && !snd_us122l_card_used[dev])
548                         break;
549         if (dev >= SNDRV_CARDS)
550                 return -ENODEV;
551         err = snd_card_new(&intf->dev, index[dev], id[dev], THIS_MODULE,
552                            sizeof(struct us122l), &card);
553         if (err < 0)
554                 return err;
555         snd_us122l_card_used[US122L(card)->card_index = dev] = 1;
556         card->private_free = snd_us122l_free;
557         US122L(card)->dev = device;
558         mutex_init(&US122L(card)->mutex);
559         init_waitqueue_head(&US122L(card)->sk.sleep);
560         INIT_LIST_HEAD(&US122L(card)->midi_list);
561         strcpy(card->driver, "USB "NAME_ALLCAPS"");
562         sprintf(card->shortname, "TASCAM "NAME_ALLCAPS"");
563         sprintf(card->longname, "%s (%x:%x if %d at %03d/%03d)",
564                 card->shortname,
565                 le16_to_cpu(device->descriptor.idVendor),
566                 le16_to_cpu(device->descriptor.idProduct),
567                 0,
568                 US122L(card)->dev->bus->busnum,
569                 US122L(card)->dev->devnum
570                 );
571         *cardp = card;
572         return 0;
573 }
574 
575 static int us122l_usb_probe(struct usb_interface *intf,
576                             const struct usb_device_id *device_id,
577                             struct snd_card **cardp)
578 {
579         struct usb_device *device = interface_to_usbdev(intf);
580         struct snd_card *card;
581         int err;
582 
583         err = usx2y_create_card(device, intf, &card);
584         if (err < 0)
585                 return err;
586 
587         if (!us122l_create_card(card)) {
588                 snd_card_free(card);
589                 return -EINVAL;
590         }
591 
592         err = snd_card_register(card);
593         if (err < 0) {
594                 snd_card_free(card);
595                 return err;
596         }
597 
598         usb_get_intf(usb_ifnum_to_if(device, 0));
599         usb_get_dev(device);
600         *cardp = card;
601         return 0;
602 }
603 
604 static int snd_us122l_probe(struct usb_interface *intf,
605                             const struct usb_device_id *id)
606 {
607         struct usb_device *device = interface_to_usbdev(intf);
608         struct snd_card *card;
609         int err;
610 
611         if ((device->descriptor.idProduct == USB_ID_US144 ||
612              device->descriptor.idProduct == USB_ID_US144MKII)
613                 && device->speed == USB_SPEED_HIGH) {
614                 snd_printk(KERN_ERR "disable ehci-hcd to run US-144 \n");
615                 return -ENODEV;
616         }
617 
618         snd_printdd(KERN_DEBUG"%p:%i\n",
619                     intf, intf->cur_altsetting->desc.bInterfaceNumber);
620         if (intf->cur_altsetting->desc.bInterfaceNumber != 1)
621                 return 0;
622 
623         err = us122l_usb_probe(usb_get_intf(intf), id, &card);
624         if (err < 0) {
625                 usb_put_intf(intf);
626                 return err;
627         }
628 
629         usb_set_intfdata(intf, card);
630         return 0;
631 }
632 
633 static void snd_us122l_disconnect(struct usb_interface *intf)
634 {
635         struct snd_card *card;
636         struct us122l *us122l;
637         struct list_head *p;
638 
639         card = usb_get_intfdata(intf);
640         if (!card)
641                 return;
642 
643         snd_card_disconnect(card);
644 
645         us122l = US122L(card);
646         mutex_lock(&us122l->mutex);
647         us122l_stop(us122l);
648         mutex_unlock(&us122l->mutex);
649 
650 /* release the midi resources */
651         list_for_each(p, &us122l->midi_list) {
652                 snd_usbmidi_disconnect(p);
653         }
654 
655         usb_put_intf(usb_ifnum_to_if(us122l->dev, 0));
656         usb_put_intf(usb_ifnum_to_if(us122l->dev, 1));
657         usb_put_dev(us122l->dev);
658 
659         while (atomic_read(&us122l->mmap_count))
660                 msleep(500);
661 
662         snd_card_free(card);
663 }
664 
665 static int snd_us122l_suspend(struct usb_interface *intf, pm_message_t message)
666 {
667         struct snd_card *card;
668         struct us122l *us122l;
669         struct list_head *p;
670 
671         card = usb_get_intfdata(intf);
672         if (!card)
673                 return 0;
674         snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
675 
676         us122l = US122L(card);
677         if (!us122l)
678                 return 0;
679 
680         list_for_each(p, &us122l->midi_list)
681                 snd_usbmidi_input_stop(p);
682 
683         mutex_lock(&us122l->mutex);
684         usb_stream_stop(&us122l->sk);
685         mutex_unlock(&us122l->mutex);
686 
687         return 0;
688 }
689 
690 static int snd_us122l_resume(struct usb_interface *intf)
691 {
692         struct snd_card *card;
693         struct us122l *us122l;
694         struct list_head *p;
695         int err;
696 
697         card = usb_get_intfdata(intf);
698         if (!card)
699                 return 0;
700 
701         us122l = US122L(card);
702         if (!us122l)
703                 return 0;
704 
705         mutex_lock(&us122l->mutex);
706         /* needed, doesn't restart without: */
707         if (us122l->dev->descriptor.idProduct == USB_ID_US144 ||
708             us122l->dev->descriptor.idProduct == USB_ID_US144MKII) {
709                 err = usb_set_interface(us122l->dev, 0, 1);
710                 if (err) {
711                         snd_printk(KERN_ERR "usb_set_interface error \n");
712                         goto unlock;
713                 }
714         }
715         err = usb_set_interface(us122l->dev, 1, 1);
716         if (err) {
717                 snd_printk(KERN_ERR "usb_set_interface error \n");
718                 goto unlock;
719         }
720 
721         pt_info_set(us122l->dev, 0x11);
722         pt_info_set(us122l->dev, 0x10);
723 
724         err = us122l_set_sample_rate(us122l->dev,
725                                      us122l->sk.s->cfg.sample_rate);
726         if (err < 0) {
727                 snd_printk(KERN_ERR "us122l_set_sample_rate error \n");
728                 goto unlock;
729         }
730         err = usb_stream_start(&us122l->sk);
731         if (err)
732                 goto unlock;
733 
734         list_for_each(p, &us122l->midi_list)
735                 snd_usbmidi_input_start(p);
736 unlock:
737         mutex_unlock(&us122l->mutex);
738         snd_power_change_state(card, SNDRV_CTL_POWER_D0);
739         return err;
740 }
741 
742 static struct usb_device_id snd_us122l_usb_id_table[] = {
743         {
744                 .match_flags =  USB_DEVICE_ID_MATCH_DEVICE,
745                 .idVendor =     0x0644,
746                 .idProduct =    USB_ID_US122L
747         },
748         {       /* US-144 only works at USB1.1! Disable module ehci-hcd. */
749                 .match_flags =  USB_DEVICE_ID_MATCH_DEVICE,
750                 .idVendor =     0x0644,
751                 .idProduct =    USB_ID_US144
752         },
753         {
754                 .match_flags =  USB_DEVICE_ID_MATCH_DEVICE,
755                 .idVendor =     0x0644,
756                 .idProduct =    USB_ID_US122MKII
757         },
758         {
759                 .match_flags =  USB_DEVICE_ID_MATCH_DEVICE,
760                 .idVendor =     0x0644,
761                 .idProduct =    USB_ID_US144MKII
762         },
763         { /* terminator */ }
764 };
765 
766 MODULE_DEVICE_TABLE(usb, snd_us122l_usb_id_table);
767 static struct usb_driver snd_us122l_usb_driver = {
768         .name =         "snd-usb-us122l",
769         .probe =        snd_us122l_probe,
770         .disconnect =   snd_us122l_disconnect,
771         .suspend =      snd_us122l_suspend,
772         .resume =       snd_us122l_resume,
773         .reset_resume = snd_us122l_resume,
774         .id_table =     snd_us122l_usb_id_table,
775         .supports_autosuspend = 1
776 };
777 
778 module_usb_driver(snd_us122l_usb_driver);
779 

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