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TOMOYO Linux Cross Reference
Linux/sound/usb/usx2y/us122l.c

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  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 /* driver_info flags */
 50 #define US122L_FLAG_US144       BIT(0)
 51 
 52 static int snd_us122l_card_used[SNDRV_CARDS];
 53 
 54 static int us122l_create_usbmidi(struct snd_card *card)
 55 {
 56         static struct snd_usb_midi_endpoint_info quirk_data = {
 57                 .out_ep = 4,
 58                 .in_ep = 3,
 59                 .out_cables =   0x001,
 60                 .in_cables =    0x001
 61         };
 62         static struct snd_usb_audio_quirk quirk = {
 63                 .vendor_name =  "US122L",
 64                 .product_name = NAME_ALLCAPS,
 65                 .ifnum =        1,
 66                 .type = QUIRK_MIDI_US122L,
 67                 .data = &quirk_data
 68         };
 69         struct usb_device *dev = US122L(card)->dev;
 70         struct usb_interface *iface = usb_ifnum_to_if(dev, 1);
 71 
 72         return snd_usbmidi_create(card, iface,
 73                                   &US122L(card)->midi_list, &quirk);
 74 }
 75 
 76 static int us144_create_usbmidi(struct snd_card *card)
 77 {
 78         static struct snd_usb_midi_endpoint_info quirk_data = {
 79                 .out_ep = 4,
 80                 .in_ep = 3,
 81                 .out_cables =   0x001,
 82                 .in_cables =    0x001
 83         };
 84         static struct snd_usb_audio_quirk quirk = {
 85                 .vendor_name =  "US144",
 86                 .product_name = NAME_ALLCAPS,
 87                 .ifnum =        0,
 88                 .type = QUIRK_MIDI_US122L,
 89                 .data = &quirk_data
 90         };
 91         struct usb_device *dev = US122L(card)->dev;
 92         struct usb_interface *iface = usb_ifnum_to_if(dev, 0);
 93 
 94         return snd_usbmidi_create(card, iface,
 95                                   &US122L(card)->midi_list, &quirk);
 96 }
 97 
 98 /*
 99  * Wrapper for usb_control_msg().
100  * Allocates a temp buffer to prevent dmaing from/to the stack.
101  */
102 static int us122l_ctl_msg(struct usb_device *dev, unsigned int pipe,
103                           __u8 request, __u8 requesttype,
104                           __u16 value, __u16 index, void *data,
105                           __u16 size, int timeout)
106 {
107         int err;
108         void *buf = NULL;
109 
110         if (size > 0) {
111                 buf = kmemdup(data, size, GFP_KERNEL);
112                 if (!buf)
113                         return -ENOMEM;
114         }
115         err = usb_control_msg(dev, pipe, request, requesttype,
116                               value, index, buf, size, timeout);
117         if (size > 0) {
118                 memcpy(data, buf, size);
119                 kfree(buf);
120         }
121         return err;
122 }
123 
124 static void pt_info_set(struct usb_device *dev, u8 v)
125 {
126         int ret;
127 
128         ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
129                               'I',
130                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
131                               v, 0, NULL, 0, 1000);
132         snd_printdd(KERN_DEBUG "%i\n", ret);
133 }
134 
135 static void usb_stream_hwdep_vm_open(struct vm_area_struct *area)
136 {
137         struct us122l *us122l = area->vm_private_data;
138         atomic_inc(&us122l->mmap_count);
139         snd_printdd(KERN_DEBUG "%i\n", atomic_read(&us122l->mmap_count));
140 }
141 
142 static int usb_stream_hwdep_vm_fault(struct vm_fault *vmf)
143 {
144         unsigned long offset;
145         struct page *page;
146         void *vaddr;
147         struct us122l *us122l = vmf->vma->vm_private_data;
148         struct usb_stream *s;
149 
150         mutex_lock(&us122l->mutex);
151         s = us122l->sk.s;
152         if (!s)
153                 goto unlock;
154 
155         offset = vmf->pgoff << PAGE_SHIFT;
156         if (offset < PAGE_ALIGN(s->read_size))
157                 vaddr = (char *)s + offset;
158         else {
159                 offset -= PAGE_ALIGN(s->read_size);
160                 if (offset >= PAGE_ALIGN(s->write_size))
161                         goto unlock;
162 
163                 vaddr = us122l->sk.write_page + offset;
164         }
165         page = virt_to_page(vaddr);
166 
167         get_page(page);
168         mutex_unlock(&us122l->mutex);
169 
170         vmf->page = page;
171 
172         return 0;
173 unlock:
174         mutex_unlock(&us122l->mutex);
175         return VM_FAULT_SIGBUS;
176 }
177 
178 static void usb_stream_hwdep_vm_close(struct vm_area_struct *area)
179 {
180         struct us122l *us122l = area->vm_private_data;
181         atomic_dec(&us122l->mmap_count);
182         snd_printdd(KERN_DEBUG "%i\n", atomic_read(&us122l->mmap_count));
183 }
184 
185 static const struct vm_operations_struct usb_stream_hwdep_vm_ops = {
186         .open = usb_stream_hwdep_vm_open,
187         .fault = usb_stream_hwdep_vm_fault,
188         .close = usb_stream_hwdep_vm_close,
189 };
190 
191 
192 static int usb_stream_hwdep_open(struct snd_hwdep *hw, struct file *file)
193 {
194         struct us122l   *us122l = hw->private_data;
195         struct usb_interface *iface;
196         snd_printdd(KERN_DEBUG "%p %p\n", hw, file);
197         if (hw->used >= 2)
198                 return -EBUSY;
199 
200         if (!us122l->first)
201                 us122l->first = file;
202 
203         if (us122l->is_us144) {
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->is_us144) {
219                 iface = usb_ifnum_to_if(us122l->dev, 0);
220                 usb_autopm_put_interface(iface);
221         }
222         iface = usb_ifnum_to_if(us122l->dev, 1);
223         usb_autopm_put_interface(iface);
224         if (us122l->first == file)
225                 us122l->first = NULL;
226         mutex_lock(&us122l->mutex);
227         if (us122l->master == file)
228                 us122l->master = us122l->slave;
229 
230         us122l->slave = NULL;
231         mutex_unlock(&us122l->mutex);
232         return 0;
233 }
234 
235 static int usb_stream_hwdep_mmap(struct snd_hwdep *hw,
236                                  struct file *filp, struct vm_area_struct *area)
237 {
238         unsigned long   size = area->vm_end - area->vm_start;
239         struct us122l   *us122l = hw->private_data;
240         unsigned long offset;
241         struct usb_stream *s;
242         int err = 0;
243         bool read;
244 
245         offset = area->vm_pgoff << PAGE_SHIFT;
246         mutex_lock(&us122l->mutex);
247         s = us122l->sk.s;
248         read = offset < s->read_size;
249         if (read && area->vm_flags & VM_WRITE) {
250                 err = -EPERM;
251                 goto out;
252         }
253         snd_printdd(KERN_DEBUG "%lu %u\n", size,
254                     read ? s->read_size : s->write_size);
255         /* if userspace tries to mmap beyond end of our buffer, fail */
256         if (size > PAGE_ALIGN(read ? s->read_size : s->write_size)) {
257                 snd_printk(KERN_WARNING "%lu > %u\n", size,
258                            read ? s->read_size : s->write_size);
259                 err = -EINVAL;
260                 goto out;
261         }
262 
263         area->vm_ops = &usb_stream_hwdep_vm_ops;
264         area->vm_flags |= VM_DONTDUMP;
265         if (!read)
266                 area->vm_flags |= VM_DONTEXPAND;
267         area->vm_private_data = us122l;
268         atomic_inc(&us122l->mmap_count);
269 out:
270         mutex_unlock(&us122l->mutex);
271         return err;
272 }
273 
274 static unsigned int usb_stream_hwdep_poll(struct snd_hwdep *hw,
275                                           struct file *file, poll_table *wait)
276 {
277         struct us122l   *us122l = hw->private_data;
278         unsigned        *polled;
279         unsigned int    mask;
280 
281         poll_wait(file, &us122l->sk.sleep, wait);
282 
283         mask = POLLIN | POLLOUT | POLLWRNORM | POLLERR;
284         if (mutex_trylock(&us122l->mutex)) {
285                 struct usb_stream *s = us122l->sk.s;
286                 if (s && s->state == usb_stream_ready) {
287                         if (us122l->first == file)
288                                 polled = &s->periods_polled;
289                         else
290                                 polled = &us122l->second_periods_polled;
291                         if (*polled != s->periods_done) {
292                                 *polled = s->periods_done;
293                                 mask = POLLIN | POLLOUT | POLLWRNORM;
294                         } else
295                                 mask = 0;
296                 }
297                 mutex_unlock(&us122l->mutex);
298         }
299         return mask;
300 }
301 
302 static void us122l_stop(struct us122l *us122l)
303 {
304         struct list_head *p;
305         list_for_each(p, &us122l->midi_list)
306                 snd_usbmidi_input_stop(p);
307 
308         usb_stream_stop(&us122l->sk);
309         usb_stream_free(&us122l->sk);
310 }
311 
312 static int us122l_set_sample_rate(struct usb_device *dev, int rate)
313 {
314         unsigned int ep = 0x81;
315         unsigned char data[3];
316         int err;
317 
318         data[0] = rate;
319         data[1] = rate >> 8;
320         data[2] = rate >> 16;
321         err = us122l_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC_SET_CUR,
322                              USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
323                              UAC_EP_CS_ATTR_SAMPLE_RATE << 8, ep, data, 3, 1000);
324         if (err < 0)
325                 snd_printk(KERN_ERR "%d: cannot set freq %d to ep 0x%x\n",
326                            dev->devnum, rate, ep);
327         return err;
328 }
329 
330 static bool us122l_start(struct us122l *us122l,
331                          unsigned rate, unsigned period_frames)
332 {
333         struct list_head *p;
334         int err;
335         unsigned use_packsize = 0;
336         bool success = false;
337 
338         if (us122l->dev->speed == USB_SPEED_HIGH) {
339                 /* The us-122l's descriptor defaults to iso max_packsize 78,
340                    which isn't needed for samplerates <= 48000.
341                    Lets save some memory:
342                 */
343                 switch (rate) {
344                 case 44100:
345                         use_packsize = 36;
346                         break;
347                 case 48000:
348                         use_packsize = 42;
349                         break;
350                 case 88200:
351                         use_packsize = 72;
352                         break;
353                 }
354         }
355         if (!usb_stream_new(&us122l->sk, us122l->dev, 1, 2,
356                             rate, use_packsize, period_frames, 6))
357                 goto out;
358 
359         err = us122l_set_sample_rate(us122l->dev, rate);
360         if (err < 0) {
361                 us122l_stop(us122l);
362                 snd_printk(KERN_ERR "us122l_set_sample_rate error \n");
363                 goto out;
364         }
365         err = usb_stream_start(&us122l->sk);
366         if (err < 0) {
367                 us122l_stop(us122l);
368                 snd_printk(KERN_ERR "us122l_start error %i \n", err);
369                 goto out;
370         }
371         list_for_each(p, &us122l->midi_list)
372                 snd_usbmidi_input_start(p);
373         success = true;
374 out:
375         return success;
376 }
377 
378 static int usb_stream_hwdep_ioctl(struct snd_hwdep *hw, struct file *file,
379                                   unsigned cmd, unsigned long arg)
380 {
381         struct usb_stream_config *cfg;
382         struct us122l *us122l = hw->private_data;
383         struct usb_stream *s;
384         unsigned min_period_frames;
385         int err = 0;
386         bool high_speed;
387 
388         if (cmd != SNDRV_USB_STREAM_IOCTL_SET_PARAMS)
389                 return -ENOTTY;
390 
391         cfg = memdup_user((void *)arg, sizeof(*cfg));
392         if (IS_ERR(cfg))
393                 return PTR_ERR(cfg);
394 
395         if (cfg->version != USB_STREAM_INTERFACE_VERSION) {
396                 err = -ENXIO;
397                 goto free;
398         }
399         high_speed = us122l->dev->speed == USB_SPEED_HIGH;
400         if ((cfg->sample_rate != 44100 && cfg->sample_rate != 48000  &&
401              (!high_speed ||
402               (cfg->sample_rate != 88200 && cfg->sample_rate != 96000))) ||
403             cfg->frame_size != 6 ||
404             cfg->period_frames > 0x3000) {
405                 err = -EINVAL;
406                 goto free;
407         }
408         switch (cfg->sample_rate) {
409         case 44100:
410                 min_period_frames = 48;
411                 break;
412         case 48000:
413                 min_period_frames = 52;
414                 break;
415         default:
416                 min_period_frames = 104;
417                 break;
418         }
419         if (!high_speed)
420                 min_period_frames <<= 1;
421         if (cfg->period_frames < min_period_frames) {
422                 err = -EINVAL;
423                 goto free;
424         }
425 
426         snd_power_wait(hw->card, SNDRV_CTL_POWER_D0);
427 
428         mutex_lock(&us122l->mutex);
429         s = us122l->sk.s;
430         if (!us122l->master)
431                 us122l->master = file;
432         else if (us122l->master != file) {
433                 if (!s || memcmp(cfg, &s->cfg, sizeof(*cfg))) {
434                         err = -EIO;
435                         goto unlock;
436                 }
437                 us122l->slave = file;
438         }
439         if (!s || memcmp(cfg, &s->cfg, sizeof(*cfg)) ||
440             s->state == usb_stream_xrun) {
441                 us122l_stop(us122l);
442                 if (!us122l_start(us122l, cfg->sample_rate, cfg->period_frames))
443                         err = -EIO;
444                 else
445                         err = 1;
446         }
447 unlock:
448         mutex_unlock(&us122l->mutex);
449 free:
450         kfree(cfg);
451         wake_up_all(&us122l->sk.sleep);
452         return err;
453 }
454 
455 #define SND_USB_STREAM_ID "USB STREAM"
456 static int usb_stream_hwdep_new(struct snd_card *card)
457 {
458         int err;
459         struct snd_hwdep *hw;
460         struct usb_device *dev = US122L(card)->dev;
461 
462         err = snd_hwdep_new(card, SND_USB_STREAM_ID, 0, &hw);
463         if (err < 0)
464                 return err;
465 
466         hw->iface = SNDRV_HWDEP_IFACE_USB_STREAM;
467         hw->private_data = US122L(card);
468         hw->ops.open = usb_stream_hwdep_open;
469         hw->ops.release = usb_stream_hwdep_release;
470         hw->ops.ioctl = usb_stream_hwdep_ioctl;
471         hw->ops.ioctl_compat = usb_stream_hwdep_ioctl;
472         hw->ops.mmap = usb_stream_hwdep_mmap;
473         hw->ops.poll = usb_stream_hwdep_poll;
474 
475         sprintf(hw->name, "/dev/bus/usb/%03d/%03d/hwdeppcm",
476                 dev->bus->busnum, dev->devnum);
477         return 0;
478 }
479 
480 
481 static bool us122l_create_card(struct snd_card *card)
482 {
483         int err;
484         struct us122l *us122l = US122L(card);
485 
486         if (us122l->is_us144) {
487                 err = usb_set_interface(us122l->dev, 0, 1);
488                 if (err) {
489                         snd_printk(KERN_ERR "usb_set_interface error \n");
490                         return false;
491                 }
492         }
493         err = usb_set_interface(us122l->dev, 1, 1);
494         if (err) {
495                 snd_printk(KERN_ERR "usb_set_interface error \n");
496                 return false;
497         }
498 
499         pt_info_set(us122l->dev, 0x11);
500         pt_info_set(us122l->dev, 0x10);
501 
502         if (!us122l_start(us122l, 44100, 256))
503                 return false;
504 
505         if (us122l->is_us144)
506                 err = us144_create_usbmidi(card);
507         else
508                 err = us122l_create_usbmidi(card);
509         if (err < 0) {
510                 snd_printk(KERN_ERR "us122l_create_usbmidi error %i \n", err);
511                 goto stop;
512         }
513         err = usb_stream_hwdep_new(card);
514         if (err < 0) {
515 /* release the midi resources */
516                 struct list_head *p;
517                 list_for_each(p, &us122l->midi_list)
518                         snd_usbmidi_disconnect(p);
519 
520                 goto stop;
521         }
522         return true;
523 
524 stop:
525         us122l_stop(us122l);
526         return false;
527 }
528 
529 static void snd_us122l_free(struct snd_card *card)
530 {
531         struct us122l   *us122l = US122L(card);
532         int             index = us122l->card_index;
533         if (index >= 0  &&  index < SNDRV_CARDS)
534                 snd_us122l_card_used[index] = 0;
535 }
536 
537 static int usx2y_create_card(struct usb_device *device,
538                              struct usb_interface *intf,
539                              struct snd_card **cardp,
540                              unsigned long flags)
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         US122L(card)->is_us144 = flags & US122L_FLAG_US144;
561         INIT_LIST_HEAD(&US122L(card)->midi_list);
562         strcpy(card->driver, "USB "NAME_ALLCAPS"");
563         sprintf(card->shortname, "TASCAM "NAME_ALLCAPS"");
564         sprintf(card->longname, "%s (%x:%x if %d at %03d/%03d)",
565                 card->shortname,
566                 le16_to_cpu(device->descriptor.idVendor),
567                 le16_to_cpu(device->descriptor.idProduct),
568                 0,
569                 US122L(card)->dev->bus->busnum,
570                 US122L(card)->dev->devnum
571                 );
572         *cardp = card;
573         return 0;
574 }
575 
576 static int us122l_usb_probe(struct usb_interface *intf,
577                             const struct usb_device_id *device_id,
578                             struct snd_card **cardp)
579 {
580         struct usb_device *device = interface_to_usbdev(intf);
581         struct snd_card *card;
582         int err;
583 
584         err = usx2y_create_card(device, intf, &card, device_id->driver_info);
585         if (err < 0)
586                 return err;
587 
588         if (!us122l_create_card(card)) {
589                 snd_card_free(card);
590                 return -EINVAL;
591         }
592 
593         err = snd_card_register(card);
594         if (err < 0) {
595                 snd_card_free(card);
596                 return err;
597         }
598 
599         usb_get_intf(usb_ifnum_to_if(device, 0));
600         usb_get_dev(device);
601         *cardp = card;
602         return 0;
603 }
604 
605 static int snd_us122l_probe(struct usb_interface *intf,
606                             const struct usb_device_id *id)
607 {
608         struct usb_device *device = interface_to_usbdev(intf);
609         struct snd_card *card;
610         int err;
611 
612         if (id->driver_info & US122L_FLAG_US144 &&
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->is_us144) {
708                 err = usb_set_interface(us122l->dev, 0, 1);
709                 if (err) {
710                         snd_printk(KERN_ERR "usb_set_interface error \n");
711                         goto unlock;
712                 }
713         }
714         err = usb_set_interface(us122l->dev, 1, 1);
715         if (err) {
716                 snd_printk(KERN_ERR "usb_set_interface error \n");
717                 goto unlock;
718         }
719 
720         pt_info_set(us122l->dev, 0x11);
721         pt_info_set(us122l->dev, 0x10);
722 
723         err = us122l_set_sample_rate(us122l->dev,
724                                      us122l->sk.s->cfg.sample_rate);
725         if (err < 0) {
726                 snd_printk(KERN_ERR "us122l_set_sample_rate error \n");
727                 goto unlock;
728         }
729         err = usb_stream_start(&us122l->sk);
730         if (err)
731                 goto unlock;
732 
733         list_for_each(p, &us122l->midi_list)
734                 snd_usbmidi_input_start(p);
735 unlock:
736         mutex_unlock(&us122l->mutex);
737         snd_power_change_state(card, SNDRV_CTL_POWER_D0);
738         return err;
739 }
740 
741 static const struct usb_device_id snd_us122l_usb_id_table[] = {
742         {
743                 .match_flags =  USB_DEVICE_ID_MATCH_DEVICE,
744                 .idVendor =     0x0644,
745                 .idProduct =    USB_ID_US122L
746         },
747         {       /* US-144 only works at USB1.1! Disable module ehci-hcd. */
748                 .match_flags =  USB_DEVICE_ID_MATCH_DEVICE,
749                 .idVendor =     0x0644,
750                 .idProduct =    USB_ID_US144,
751                 .driver_info =  US122L_FLAG_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                 .driver_info =  US122L_FLAG_US144
763         },
764         { /* terminator */ }
765 };
766 
767 MODULE_DEVICE_TABLE(usb, snd_us122l_usb_id_table);
768 static struct usb_driver snd_us122l_usb_driver = {
769         .name =         "snd-usb-us122l",
770         .probe =        snd_us122l_probe,
771         .disconnect =   snd_us122l_disconnect,
772         .suspend =      snd_us122l_suspend,
773         .resume =       snd_us122l_resume,
774         .reset_resume = snd_us122l_resume,
775         .id_table =     snd_us122l_usb_id_table,
776         .supports_autosuspend = 1
777 };
778 
779 module_usb_driver(snd_us122l_usb_driver);
780 

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