Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux
[platform/adaptation/renesas_rcar/renesas_kernel.git] / 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_DONTEXPAND | VM_DONTDUMP;
266         area->vm_private_data = us122l;
267         atomic_inc(&us122l->mmap_count);
268 out:
269         mutex_unlock(&us122l->mutex);
270         return err;
271 }
272
273 static unsigned int usb_stream_hwdep_poll(struct snd_hwdep *hw,
274                                           struct file *file, poll_table *wait)
275 {
276         struct us122l   *us122l = hw->private_data;
277         unsigned        *polled;
278         unsigned int    mask;
279
280         poll_wait(file, &us122l->sk.sleep, wait);
281
282         mask = POLLIN | POLLOUT | POLLWRNORM | POLLERR;
283         if (mutex_trylock(&us122l->mutex)) {
284                 struct usb_stream *s = us122l->sk.s;
285                 if (s && s->state == usb_stream_ready) {
286                         if (us122l->first == file)
287                                 polled = &s->periods_polled;
288                         else
289                                 polled = &us122l->second_periods_polled;
290                         if (*polled != s->periods_done) {
291                                 *polled = s->periods_done;
292                                 mask = POLLIN | POLLOUT | POLLWRNORM;
293                         } else
294                                 mask = 0;
295                 }
296                 mutex_unlock(&us122l->mutex);
297         }
298         return mask;
299 }
300
301 static void us122l_stop(struct us122l *us122l)
302 {
303         struct list_head *p;
304         list_for_each(p, &us122l->midi_list)
305                 snd_usbmidi_input_stop(p);
306
307         usb_stream_stop(&us122l->sk);
308         usb_stream_free(&us122l->sk);
309 }
310
311 static int us122l_set_sample_rate(struct usb_device *dev, int rate)
312 {
313         unsigned int ep = 0x81;
314         unsigned char data[3];
315         int err;
316
317         data[0] = rate;
318         data[1] = rate >> 8;
319         data[2] = rate >> 16;
320         err = us122l_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC_SET_CUR,
321                              USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
322                              UAC_EP_CS_ATTR_SAMPLE_RATE << 8, ep, data, 3, 1000);
323         if (err < 0)
324                 snd_printk(KERN_ERR "%d: cannot set freq %d to ep 0x%x\n",
325                            dev->devnum, rate, ep);
326         return err;
327 }
328
329 static bool us122l_start(struct us122l *us122l,
330                          unsigned rate, unsigned period_frames)
331 {
332         struct list_head *p;
333         int err;
334         unsigned use_packsize = 0;
335         bool success = false;
336
337         if (us122l->dev->speed == USB_SPEED_HIGH) {
338                 /* The us-122l's descriptor defaults to iso max_packsize 78,
339                    which isn't needed for samplerates <= 48000.
340                    Lets save some memory:
341                 */
342                 switch (rate) {
343                 case 44100:
344                         use_packsize = 36;
345                         break;
346                 case 48000:
347                         use_packsize = 42;
348                         break;
349                 case 88200:
350                         use_packsize = 72;
351                         break;
352                 }
353         }
354         if (!usb_stream_new(&us122l->sk, us122l->dev, 1, 2,
355                             rate, use_packsize, period_frames, 6))
356                 goto out;
357
358         err = us122l_set_sample_rate(us122l->dev, rate);
359         if (err < 0) {
360                 us122l_stop(us122l);
361                 snd_printk(KERN_ERR "us122l_set_sample_rate error \n");
362                 goto out;
363         }
364         err = usb_stream_start(&us122l->sk);
365         if (err < 0) {
366                 us122l_stop(us122l);
367                 snd_printk(KERN_ERR "us122l_start error %i \n", err);
368                 goto out;
369         }
370         list_for_each(p, &us122l->midi_list)
371                 snd_usbmidi_input_start(p);
372         success = true;
373 out:
374         return success;
375 }
376
377 static int usb_stream_hwdep_ioctl(struct snd_hwdep *hw, struct file *file,
378                                   unsigned cmd, unsigned long arg)
379 {
380         struct usb_stream_config *cfg;
381         struct us122l *us122l = hw->private_data;
382         struct usb_stream *s;
383         unsigned min_period_frames;
384         int err = 0;
385         bool high_speed;
386
387         if (cmd != SNDRV_USB_STREAM_IOCTL_SET_PARAMS)
388                 return -ENOTTY;
389
390         cfg = memdup_user((void *)arg, sizeof(*cfg));
391         if (IS_ERR(cfg))
392                 return PTR_ERR(cfg);
393
394         if (cfg->version != USB_STREAM_INTERFACE_VERSION) {
395                 err = -ENXIO;
396                 goto free;
397         }
398         high_speed = us122l->dev->speed == USB_SPEED_HIGH;
399         if ((cfg->sample_rate != 44100 && cfg->sample_rate != 48000  &&
400              (!high_speed ||
401               (cfg->sample_rate != 88200 && cfg->sample_rate != 96000))) ||
402             cfg->frame_size != 6 ||
403             cfg->period_frames > 0x3000) {
404                 err = -EINVAL;
405                 goto free;
406         }
407         switch (cfg->sample_rate) {
408         case 44100:
409                 min_period_frames = 48;
410                 break;
411         case 48000:
412                 min_period_frames = 52;
413                 break;
414         default:
415                 min_period_frames = 104;
416                 break;
417         }
418         if (!high_speed)
419                 min_period_frames <<= 1;
420         if (cfg->period_frames < min_period_frames) {
421                 err = -EINVAL;
422                 goto free;
423         }
424
425         snd_power_wait(hw->card, SNDRV_CTL_POWER_D0);
426
427         mutex_lock(&us122l->mutex);
428         s = us122l->sk.s;
429         if (!us122l->master)
430                 us122l->master = file;
431         else if (us122l->master != file) {
432                 if (!s || memcmp(cfg, &s->cfg, sizeof(*cfg))) {
433                         err = -EIO;
434                         goto unlock;
435                 }
436                 us122l->slave = file;
437         }
438         if (!s || memcmp(cfg, &s->cfg, sizeof(*cfg)) ||
439             s->state == usb_stream_xrun) {
440                 us122l_stop(us122l);
441                 if (!us122l_start(us122l, cfg->sample_rate, cfg->period_frames))
442                         err = -EIO;
443                 else
444                         err = 1;
445         }
446 unlock:
447         mutex_unlock(&us122l->mutex);
448 free:
449         kfree(cfg);
450         wake_up_all(&us122l->sk.sleep);
451         return err;
452 }
453
454 #define SND_USB_STREAM_ID "USB STREAM"
455 static int usb_stream_hwdep_new(struct snd_card *card)
456 {
457         int err;
458         struct snd_hwdep *hw;
459         struct usb_device *dev = US122L(card)->dev;
460
461         err = snd_hwdep_new(card, SND_USB_STREAM_ID, 0, &hw);
462         if (err < 0)
463                 return err;
464
465         hw->iface = SNDRV_HWDEP_IFACE_USB_STREAM;
466         hw->private_data = US122L(card);
467         hw->ops.open = usb_stream_hwdep_open;
468         hw->ops.release = usb_stream_hwdep_release;
469         hw->ops.ioctl = usb_stream_hwdep_ioctl;
470         hw->ops.ioctl_compat = usb_stream_hwdep_ioctl;
471         hw->ops.mmap = usb_stream_hwdep_mmap;
472         hw->ops.poll = usb_stream_hwdep_poll;
473
474         sprintf(hw->name, "/proc/bus/usb/%03d/%03d/hwdeppcm",
475                 dev->bus->busnum, dev->devnum);
476         return 0;
477 }
478
479
480 static bool us122l_create_card(struct snd_card *card)
481 {
482         int err;
483         struct us122l *us122l = US122L(card);
484
485         if (us122l->dev->descriptor.idProduct == USB_ID_US144 ||
486             us122l->dev->descriptor.idProduct == USB_ID_US144MKII) {
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->dev->descriptor.idProduct == USB_ID_US144 ||
506             us122l->dev->descriptor.idProduct == USB_ID_US144MKII)
507                 err = us144_create_usbmidi(card);
508         else
509                 err = us122l_create_usbmidi(card);
510         if (err < 0) {
511                 snd_printk(KERN_ERR "us122l_create_usbmidi error %i \n", err);
512                 us122l_stop(us122l);
513                 return false;
514         }
515         err = usb_stream_hwdep_new(card);
516         if (err < 0) {
517 /* release the midi resources */
518                 struct list_head *p;
519                 list_for_each(p, &us122l->midi_list)
520                         snd_usbmidi_disconnect(p);
521
522                 us122l_stop(us122l);
523                 return false;
524         }
525         return true;
526 }
527
528 static void snd_us122l_free(struct snd_card *card)
529 {
530         struct us122l   *us122l = US122L(card);
531         int             index = us122l->card_index;
532         if (index >= 0  &&  index < SNDRV_CARDS)
533                 snd_us122l_card_used[index] = 0;
534 }
535
536 static int usx2y_create_card(struct usb_device *device, struct snd_card **cardp)
537 {
538         int             dev;
539         struct snd_card *card;
540         int err;
541
542         for (dev = 0; dev < SNDRV_CARDS; ++dev)
543                 if (enable[dev] && !snd_us122l_card_used[dev])
544                         break;
545         if (dev >= SNDRV_CARDS)
546                 return -ENODEV;
547         err = snd_card_create(index[dev], id[dev], THIS_MODULE,
548                               sizeof(struct us122l), &card);
549         if (err < 0)
550                 return err;
551         snd_us122l_card_used[US122L(card)->card_index = dev] = 1;
552         card->private_free = snd_us122l_free;
553         US122L(card)->dev = device;
554         mutex_init(&US122L(card)->mutex);
555         init_waitqueue_head(&US122L(card)->sk.sleep);
556         INIT_LIST_HEAD(&US122L(card)->midi_list);
557         strcpy(card->driver, "USB "NAME_ALLCAPS"");
558         sprintf(card->shortname, "TASCAM "NAME_ALLCAPS"");
559         sprintf(card->longname, "%s (%x:%x if %d at %03d/%03d)",
560                 card->shortname,
561                 le16_to_cpu(device->descriptor.idVendor),
562                 le16_to_cpu(device->descriptor.idProduct),
563                 0,
564                 US122L(card)->dev->bus->busnum,
565                 US122L(card)->dev->devnum
566                 );
567         *cardp = card;
568         return 0;
569 }
570
571 static int us122l_usb_probe(struct usb_interface *intf,
572                             const struct usb_device_id *device_id,
573                             struct snd_card **cardp)
574 {
575         struct usb_device *device = interface_to_usbdev(intf);
576         struct snd_card *card;
577         int err;
578
579         err = usx2y_create_card(device, &card);
580         if (err < 0)
581                 return err;
582
583         snd_card_set_dev(card, &intf->dev);
584         if (!us122l_create_card(card)) {
585                 snd_card_free(card);
586                 return -EINVAL;
587         }
588
589         err = snd_card_register(card);
590         if (err < 0) {
591                 snd_card_free(card);
592                 return err;
593         }
594
595         usb_get_intf(usb_ifnum_to_if(device, 0));
596         usb_get_dev(device);
597         *cardp = card;
598         return 0;
599 }
600
601 static int snd_us122l_probe(struct usb_interface *intf,
602                             const struct usb_device_id *id)
603 {
604         struct usb_device *device = interface_to_usbdev(intf);
605         struct snd_card *card;
606         int err;
607
608         if ((device->descriptor.idProduct == USB_ID_US144 ||
609              device->descriptor.idProduct == USB_ID_US144MKII)
610                 && device->speed == USB_SPEED_HIGH) {
611                 snd_printk(KERN_ERR "disable ehci-hcd to run US-144 \n");
612                 return -ENODEV;
613         }
614
615         snd_printdd(KERN_DEBUG"%p:%i\n",
616                     intf, intf->cur_altsetting->desc.bInterfaceNumber);
617         if (intf->cur_altsetting->desc.bInterfaceNumber != 1)
618                 return 0;
619
620         err = us122l_usb_probe(usb_get_intf(intf), id, &card);
621         if (err < 0) {
622                 usb_put_intf(intf);
623                 return err;
624         }
625
626         usb_set_intfdata(intf, card);
627         return 0;
628 }
629
630 static void snd_us122l_disconnect(struct usb_interface *intf)
631 {
632         struct snd_card *card;
633         struct us122l *us122l;
634         struct list_head *p;
635
636         card = usb_get_intfdata(intf);
637         if (!card)
638                 return;
639
640         snd_card_disconnect(card);
641
642         us122l = US122L(card);
643         mutex_lock(&us122l->mutex);
644         us122l_stop(us122l);
645         mutex_unlock(&us122l->mutex);
646
647 /* release the midi resources */
648         list_for_each(p, &us122l->midi_list) {
649                 snd_usbmidi_disconnect(p);
650         }
651
652         usb_put_intf(usb_ifnum_to_if(us122l->dev, 0));
653         usb_put_intf(usb_ifnum_to_if(us122l->dev, 1));
654         usb_put_dev(us122l->dev);
655
656         while (atomic_read(&us122l->mmap_count))
657                 msleep(500);
658
659         snd_card_free(card);
660 }
661
662 static int snd_us122l_suspend(struct usb_interface *intf, pm_message_t message)
663 {
664         struct snd_card *card;
665         struct us122l *us122l;
666         struct list_head *p;
667
668         card = usb_get_intfdata(intf);
669         if (!card)
670                 return 0;
671         snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
672
673         us122l = US122L(card);
674         if (!us122l)
675                 return 0;
676
677         list_for_each(p, &us122l->midi_list)
678                 snd_usbmidi_input_stop(p);
679
680         mutex_lock(&us122l->mutex);
681         usb_stream_stop(&us122l->sk);
682         mutex_unlock(&us122l->mutex);
683
684         return 0;
685 }
686
687 static int snd_us122l_resume(struct usb_interface *intf)
688 {
689         struct snd_card *card;
690         struct us122l *us122l;
691         struct list_head *p;
692         int err;
693
694         card = usb_get_intfdata(intf);
695         if (!card)
696                 return 0;
697
698         us122l = US122L(card);
699         if (!us122l)
700                 return 0;
701
702         mutex_lock(&us122l->mutex);
703         /* needed, doesn't restart without: */
704         if (us122l->dev->descriptor.idProduct == USB_ID_US144 ||
705             us122l->dev->descriptor.idProduct == USB_ID_US144MKII) {
706                 err = usb_set_interface(us122l->dev, 0, 1);
707                 if (err) {
708                         snd_printk(KERN_ERR "usb_set_interface error \n");
709                         goto unlock;
710                 }
711         }
712         err = usb_set_interface(us122l->dev, 1, 1);
713         if (err) {
714                 snd_printk(KERN_ERR "usb_set_interface error \n");
715                 goto unlock;
716         }
717
718         pt_info_set(us122l->dev, 0x11);
719         pt_info_set(us122l->dev, 0x10);
720
721         err = us122l_set_sample_rate(us122l->dev,
722                                      us122l->sk.s->cfg.sample_rate);
723         if (err < 0) {
724                 snd_printk(KERN_ERR "us122l_set_sample_rate error \n");
725                 goto unlock;
726         }
727         err = usb_stream_start(&us122l->sk);
728         if (err)
729                 goto unlock;
730
731         list_for_each(p, &us122l->midi_list)
732                 snd_usbmidi_input_start(p);
733 unlock:
734         mutex_unlock(&us122l->mutex);
735         snd_power_change_state(card, SNDRV_CTL_POWER_D0);
736         return err;
737 }
738
739 static struct usb_device_id snd_us122l_usb_id_table[] = {
740         {
741                 .match_flags =  USB_DEVICE_ID_MATCH_DEVICE,
742                 .idVendor =     0x0644,
743                 .idProduct =    USB_ID_US122L
744         },
745         {       /* US-144 only works at USB1.1! Disable module ehci-hcd. */
746                 .match_flags =  USB_DEVICE_ID_MATCH_DEVICE,
747                 .idVendor =     0x0644,
748                 .idProduct =    USB_ID_US144
749         },
750         {
751                 .match_flags =  USB_DEVICE_ID_MATCH_DEVICE,
752                 .idVendor =     0x0644,
753                 .idProduct =    USB_ID_US122MKII
754         },
755         {
756                 .match_flags =  USB_DEVICE_ID_MATCH_DEVICE,
757                 .idVendor =     0x0644,
758                 .idProduct =    USB_ID_US144MKII
759         },
760         { /* terminator */ }
761 };
762
763 MODULE_DEVICE_TABLE(usb, snd_us122l_usb_id_table);
764 static struct usb_driver snd_us122l_usb_driver = {
765         .name =         "snd-usb-us122l",
766         .probe =        snd_us122l_probe,
767         .disconnect =   snd_us122l_disconnect,
768         .suspend =      snd_us122l_suspend,
769         .resume =       snd_us122l_resume,
770         .reset_resume = snd_us122l_resume,
771         .id_table =     snd_us122l_usb_id_table,
772         .supports_autosuspend = 1
773 };
774
775 module_usb_driver(snd_us122l_usb_driver);