1 /*****************************************************************************/
4 * audio.c -- USB Audio Class driver
6 * Copyright (C) 1999, 2000, 2001, 2003, 2004
7 * Alan Cox (alan@lxorguk.ukuu.org.uk)
8 * Thomas Sailer (sailer@ife.ee.ethz.ch)
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
16 * Use the 'lsusb' utility to dump the descriptors.
18 * 1999-09-07: Alan Cox
19 * Parsing Audio descriptor patch
20 * 1999-09-08: Thomas Sailer
21 * Added OSS compatible data io functions; both parts of the
22 * driver remain to be glued together
23 * 1999-09-10: Thomas Sailer
24 * Beautified the driver. Added sample format conversions.
25 * Still not properly glued with the parsing code.
26 * The parsing code seems to have its problems btw,
27 * Since it parses all available configs but doesn't
28 * store which iface/altsetting belongs to which config.
29 * 1999-09-20: Thomas Sailer
30 * Threw out Alan's parsing code and implemented my own one.
31 * You cannot reasonnably linearly parse audio descriptors,
32 * especially the AudioClass descriptors have to be considered
33 * pointer lists. Mixer parsing untested, due to lack of device.
34 * First stab at synch pipe implementation, the Dallas USB DAC
35 * wants to use an Asynch out pipe. usb_audio_state now basically
36 * only contains lists of mixer and wave devices. We can therefore
37 * now have multiple mixer/wave devices per USB device.
38 * 1999-10-28: Thomas Sailer
39 * Converted to URB API. Fixed a taskstate/wakeup semantics mistake
40 * that made the driver consume all available CPU cycles.
41 * Now runs stable on UHCI-Acher/Fliegl/Sailer.
42 * 1999-10-31: Thomas Sailer
43 * Audio can now be unloaded if it is not in use by any mixer
44 * or dsp client (formerly you had to disconnect the audio devices
46 * Finally, about three months after ordering, my "Maxxtro SPK222"
47 * speakers arrived, isn't disdata a great mail order company 8-)
48 * Parse class specific endpoint descriptor of the audiostreaming
49 * interfaces and take the endpoint attributes from there.
50 * Unbelievably, the Philips USB DAC has a sampling rate range
51 * of over a decade, yet does not support the sampling rate control!
52 * No wonder it sounds so bad, has very audible sampling rate
53 * conversion distortion. Don't try to listen to it using
55 * "Let's make things better" -> but please Philips start with your
57 * 1999-11-02: Thomas Sailer
58 * It takes the Philips boxes several seconds to acquire synchronisation
59 * that means they won't play short sounds. Should probably maintain
60 * the ISO datastream even if there's nothing to play.
61 * Fix counting the total_bytes counter, RealPlayer G2 depends on it.
62 * 1999-12-20: Thomas Sailer
63 * Fix bad bug in conversion to per interface probing.
64 * disconnect was called multiple times for the audio device,
65 * leading to a premature freeing of the audio structures
66 * 2000-05-13: Thomas Sailer
67 * I don't remember who changed the find_format routine,
68 * but the change was completely broken for the Dallas
69 * chip. Anyway taking sampling rate into account in find_format
70 * is bad and should not be done unless there are devices with
71 * completely broken audio descriptors. Unless someone shows
72 * me such a descriptor, I will not allow find_format to
73 * take the sampling rate into account.
74 * Also, the former find_format made:
75 * - mpg123 play mono instead of stereo
76 * - sox completely fail for wav's with sample rates < 44.1kHz
77 * for the Dallas chip.
78 * Also fix a rather long standing problem with applications that
79 * use "small" writes producing no sound at all.
80 * 2000-05-15: Thomas Sailer
81 * My fears came true, the Philips camera indeed has pretty stupid
83 * 2000-05-17: Thomas Sailer
84 * Nemsoft spotted my stupid last minute change, thanks
85 * 2000-05-19: Thomas Sailer
86 * Fixed FEATURE_UNIT thinkos found thanks to the KC Technology
87 * Xtend device. Basically the driver treated FEATURE_UNIT's sourced
88 * by mono terminals as stereo.
89 * 2000-05-20: Thomas Sailer
90 * SELECTOR support (and thus selecting record channels from the mixer).
91 * Somewhat peculiar due to OSS interface limitations. Only works
92 * for channels where a "slider" is already in front of it (i.e.
93 * a MIXER unit or a FEATURE unit with volume capability).
94 * 2000-11-26: Thomas Sailer
95 * Workaround for Dallas DS4201. The DS4201 uses PCM8 as format tag for
96 * its 8 bit modes, but expects signed data (and should therefore have used PCM).
97 * 2001-03-10: Thomas Sailer
98 * provide abs function, prevent picking up a bogus kernel macro
99 * for abs. Bug report by Andrew Morton <andrewm@uow.edu.au>
100 * 2001-06-16: Bryce Nesbitt <bryce@obviously.com>
101 * Fix SNDCTL_DSP_STEREO API violation
102 * 2003-04-08: Oliver Neukum (oliver@neukum.name):
103 * Setting a configuration is done by usbcore and must not be overridden
104 * 2004-02-27: Workaround for broken synch descriptors
105 * 2004-03-07: Alan Stern <stern@rowland.harvard.edu>
106 * Add usb_ifnum_to_if() and usb_altnum_to_altsetting() support.
107 * Use the in-memory descriptors instead of reading them from the device.
114 * Alan Cox and Thomas Sailer are starting to dig at opposite ends and
115 * are hoping to meet in the middle, just like tunnel diggers :)
116 * Alan tackles the descriptor parsing, Thomas the actual data IO and the
117 * OSS compatible interface.
119 * Data IO implementation issues
121 * A mmap'able ring buffer per direction is implemented, because
122 * almost every OSS app expects it. It is however impractical to
123 * transmit/receive USB data directly into and out of the ring buffer,
124 * due to alignment and synchronisation issues. Instead, the ring buffer
125 * feeds a constant time delay line that handles the USB issues.
127 * Now we first try to find an alternate setting that exactly matches
128 * the sample format requested by the user. If we find one, we do not
129 * need to perform any sample rate conversions. If there is no matching
130 * altsetting, we choose the closest one and perform sample format
131 * conversions. We never do sample rate conversion; these are too
132 * expensive to be performed in the kernel.
134 * Current status: no known HCD-specific issues.
136 * Generally: Due to the brokenness of the Audio Class spec
137 * it seems generally impossible to write a generic Audio Class driver,
138 * so a reasonable driver should implement the features that are actually
141 * Parsing implementation issues
143 * One cannot reasonably parse the AudioClass descriptors linearly.
144 * Therefore the current implementation features routines to look
145 * for a specific descriptor in the descriptor list.
147 * How does the parsing work? First, all interfaces are searched
148 * for an AudioControl class interface. If found, the config descriptor
149 * that belongs to the current configuration is searched and
150 * the HEADER descriptor is found. It contains a list of
151 * all AudioStreaming and MIDIStreaming devices. This list is then walked,
152 * and all AudioStreaming interfaces are classified into input and output
153 * interfaces (according to the endpoint0 direction in altsetting1) (MIDIStreaming
154 * is currently not supported). The input & output list is then used
155 * to group inputs and outputs together and issued pairwise to the
156 * AudioStreaming class parser. Finally, all OUTPUT_TERMINAL descriptors
157 * are walked and issued to the mixer construction routine.
159 * The AudioStreaming parser simply enumerates all altsettings belonging
160 * to the specified interface. It looks for AS_GENERAL and FORMAT_TYPE
161 * class specific descriptors to extract the sample format/sample rate
162 * data. Only sample format types PCM and PCM8 are supported right now, and
163 * only FORMAT_TYPE_I is handled. The isochronous data endpoint needs to
164 * be the first endpoint of the interface, and the optional synchronisation
165 * isochronous endpoint the second one.
167 * Mixer construction works as follows: The various TERMINAL and UNIT
168 * descriptors span a tree from the root (OUTPUT_TERMINAL) through the
169 * intermediate nodes (UNITs) to the leaves (INPUT_TERMINAL). We walk
170 * that tree in a depth first manner. FEATURE_UNITs may contribute volume,
171 * bass and treble sliders to the mixer, MIXER_UNITs volume sliders.
172 * The terminal type encoded in the INPUT_TERMINALs feeds a heuristic
173 * to determine "meaningful" OSS slider numbers, however we will see
174 * how well this works in practice. Other features are not used at the
175 * moment, they seem less often used. Also, it seems difficult at least
176 * to construct recording source switches from SELECTOR_UNITs, but
177 * since there are not many USB ADC's available, we leave that for later.
180 /*****************************************************************************/
182 #include <linux/kernel.h>
183 #include <linux/slab.h>
184 #include <linux/string.h>
185 #include <linux/timer.h>
186 #include <linux/sched.h>
187 #include <linux/smp_lock.h>
188 #include <linux/module.h>
189 #include <linux/sound.h>
190 #include <linux/soundcard.h>
191 #include <linux/list.h>
192 #include <linux/vmalloc.h>
193 #include <linux/init.h>
194 #include <linux/poll.h>
195 #include <linux/bitops.h>
196 #include <asm/uaccess.h>
198 #include <linux/usb.h>
203 * Version Information
205 #define DRIVER_VERSION "v1.0.0"
206 #define DRIVER_AUTHOR "Alan Cox <alan@lxorguk.ukuu.org.uk>, Thomas Sailer (sailer@ife.ee.ethz.ch)"
207 #define DRIVER_DESC "USB Audio Class driver"
209 #define AUDIO_DEBUG 1
211 #define SND_DEV_DSP16 5
215 /* --------------------------------------------------------------------- */
218 * Linked list of all audio devices...
220 static struct list_head audiodevs = LIST_HEAD_INIT(audiodevs);
221 static DECLARE_MUTEX(open_sem);
224 * wait queue for processes wanting to open an USB audio device
226 static DECLARE_WAIT_QUEUE_HEAD(open_wait);
229 #define MAXFORMATS MAX_ALT
230 #define DMABUFSHIFT 17 /* 128k worth of DMA buffer */
231 #define NRSGBUF (1U<<(DMABUFSHIFT-PAGE_SHIFT))
237 * - Synchronisation behaviour
238 * Don't touch this if you don't understand all of the above.
241 #define SYNCFRAMES DESCFRAMES
243 #define MIXFLG_STEREOIN 1
244 #define MIXFLG_STEREOOUT 2
246 struct mixerchannel {
248 __u16 osschannel; /* number of the OSS channel */
249 __s16 minval, maxval;
259 unsigned int sratelo;
260 unsigned int sratehi;
261 unsigned char altsetting;
262 unsigned char attributes;
266 /* buffer data format */
269 /* physical buffer */
270 unsigned char *sgbuf[NRSGBUF];
274 unsigned wrptr, rdptr;
275 unsigned total_bytes;
277 unsigned error; /* over/underrun */
278 wait_queue_head_t wait;
279 /* redundant, but makes calculations easier */
285 unsigned ossfragshift;
287 unsigned subdivision;
290 struct usb_audio_state;
292 #define FLG_URB0RUNNING 1
293 #define FLG_URB1RUNNING 2
294 #define FLG_SYNC0RUNNING 4
295 #define FLG_SYNC1RUNNING 8
296 #define FLG_RUNNING 16
297 #define FLG_CONNECTED 32
308 struct usb_audiodev {
309 struct list_head list;
310 struct usb_audio_state *state;
312 /* soundcore stuff */
317 spinlock_t lock; /* DMA buffer access spinlock */
320 int interface; /* Interface number, -1 means not used */
321 unsigned int format; /* USB data format */
322 unsigned int datapipe; /* the data input pipe */
323 unsigned int syncpipe; /* the synchronisation pipe - 0 for anything but adaptive IN mode */
324 unsigned int syncinterval; /* P for adaptive IN mode, 0 otherwise */
325 unsigned int freqn; /* nominal sampling rate in USB format, i.e. fs/1000 in Q10.14 */
326 unsigned int freqmax; /* maximum sampling rate, used for buffer management */
327 unsigned int phase; /* phase accumulator */
328 unsigned int flags; /* see FLG_ defines */
330 struct my_data_urb durb[2]; /* ISO descriptors for the data endpoint */
331 struct my_sync_urb surb[2]; /* ISO sync pipe descriptor if needed */
337 int interface; /* Interface number, -1 means not used */
338 unsigned int format; /* USB data format */
339 unsigned int datapipe; /* the data input pipe */
340 unsigned int syncpipe; /* the synchronisation pipe - 0 for anything but asynchronous OUT mode */
341 unsigned int syncinterval; /* P for asynchronous OUT mode, 0 otherwise */
342 unsigned int freqn; /* nominal sampling rate in USB format, i.e. fs/1000 in Q10.14 */
343 unsigned int freqm; /* momentary sampling rate in USB format, i.e. fs/1000 in Q10.14 */
344 unsigned int freqmax; /* maximum sampling rate, used for buffer management */
345 unsigned int phase; /* phase accumulator */
346 unsigned int flags; /* see FLG_ defines */
348 struct my_data_urb durb[2]; /* ISO descriptors for the data endpoint */
349 struct my_sync_urb surb[2]; /* ISO sync pipe descriptor if needed */
355 unsigned int numfmtin, numfmtout;
356 struct audioformat fmtin[MAXFORMATS];
357 struct audioformat fmtout[MAXFORMATS];
360 struct usb_mixerdev {
361 struct list_head list;
362 struct usb_audio_state *state;
364 /* soundcore stuff */
367 unsigned char iface; /* interface number of the AudioControl interface */
369 /* USB format descriptions */
370 unsigned int numch, modcnt;
372 /* mixch is last and gets allocated dynamically */
373 struct mixerchannel ch[0];
376 struct usb_audio_state {
377 struct list_head audiodev;
380 struct usb_device *usbdev;
382 struct list_head audiolist;
383 struct list_head mixerlist;
385 unsigned count; /* usage counter; NOTE: the usb stack is also considered a user */
388 /* private audio format extensions */
389 #define AFMT_STEREO 0x80000000
390 #define AFMT_ISSTEREO(x) ((x) & AFMT_STEREO)
391 #define AFMT_IS16BIT(x) ((x) & (AFMT_S16_LE|AFMT_S16_BE|AFMT_U16_LE|AFMT_U16_BE))
392 #define AFMT_ISUNSIGNED(x) ((x) & (AFMT_U8|AFMT_U16_LE|AFMT_U16_BE))
393 #define AFMT_BYTESSHIFT(x) ((AFMT_ISSTEREO(x) ? 1 : 0) + (AFMT_IS16BIT(x) ? 1 : 0))
394 #define AFMT_BYTES(x) (1<<AFMT_BYTESSHFIT(x))
396 /* --------------------------------------------------------------------- */
398 static inline unsigned ld2(unsigned int x)
423 /* --------------------------------------------------------------------- */
426 * OSS compatible ring buffer management. The ring buffer may be mmap'ed into
427 * an application address space.
429 * I first used the rvmalloc stuff copied from bttv. Alan Cox did not like it, so
430 * we now use an array of pointers to a single page each. This saves us the
431 * kernel page table manipulations, but we have to do a page table alike mechanism
432 * (though only one indirection) in software.
435 static void dmabuf_release(struct dmabuf *db)
440 for(nr = 0; nr < NRSGBUF; nr++) {
441 if (!(p = db->sgbuf[nr]))
443 ClearPageReserved(virt_to_page(p));
444 free_page((unsigned long)p);
445 db->sgbuf[nr] = NULL;
447 db->mapped = db->ready = 0;
450 static int dmabuf_init(struct dmabuf *db)
452 unsigned int nr, bytepersec, bufs;
455 /* initialize some fields */
456 db->rdptr = db->wrptr = db->total_bytes = db->count = db->error = 0;
457 /* calculate required buffer size */
458 bytepersec = db->srate << AFMT_BYTESSHIFT(db->format);
459 bufs = 1U << DMABUFSHIFT;
460 if (db->ossfragshift) {
461 if ((1000 << db->ossfragshift) < bytepersec)
462 db->fragshift = ld2(bytepersec/1000);
464 db->fragshift = db->ossfragshift;
466 db->fragshift = ld2(bytepersec/100/(db->subdivision ? db->subdivision : 1));
467 if (db->fragshift < 3)
470 db->numfrag = bufs >> db->fragshift;
471 while (db->numfrag < 4 && db->fragshift > 3) {
473 db->numfrag = bufs >> db->fragshift;
475 db->fragsize = 1 << db->fragshift;
476 if (db->ossmaxfrags >= 4 && db->ossmaxfrags < db->numfrag)
477 db->numfrag = db->ossmaxfrags;
478 db->dmasize = db->numfrag << db->fragshift;
479 for(nr = 0; nr < NRSGBUF; nr++) {
480 if (!db->sgbuf[nr]) {
481 p = (void *)get_zeroed_page(GFP_KERNEL);
485 SetPageReserved(virt_to_page(p));
487 memset(db->sgbuf[nr], AFMT_ISUNSIGNED(db->format) ? 0x80 : 0, PAGE_SIZE);
488 if ((nr << PAGE_SHIFT) >= db->dmasize)
491 db->bufsize = nr << PAGE_SHIFT;
493 dprintk((KERN_DEBUG "usbaudio: dmabuf_init bytepersec %d bufs %d ossfragshift %d ossmaxfrags %d "
494 "fragshift %d fragsize %d numfrag %d dmasize %d bufsize %d fmt 0x%x srate %d\n",
495 bytepersec, bufs, db->ossfragshift, db->ossmaxfrags, db->fragshift, db->fragsize,
496 db->numfrag, db->dmasize, db->bufsize, db->format, db->srate));
500 static int dmabuf_mmap(struct vm_area_struct *vma, struct dmabuf *db, unsigned long start, unsigned long size, pgprot_t prot)
504 if (!db->ready || db->mapped || (start | size) & (PAGE_SIZE-1) || size > db->bufsize)
507 for(nr = 0; nr < size; nr++)
511 for(nr = 0; nr < size; nr++) {
512 if (remap_page_range(vma, start, virt_to_phys(db->sgbuf[nr]), PAGE_SIZE, prot))
519 static void dmabuf_copyin(struct dmabuf *db, const void *buffer, unsigned int size)
521 unsigned int pgrem, rem;
523 db->total_bytes += size;
527 pgrem = ((~db->wrptr) & (PAGE_SIZE-1)) + 1;
530 rem = db->dmasize - db->wrptr;
533 memcpy((db->sgbuf[db->wrptr >> PAGE_SHIFT]) + (db->wrptr & (PAGE_SIZE-1)), buffer, pgrem);
537 if (db->wrptr >= db->dmasize)
542 static void dmabuf_copyout(struct dmabuf *db, void *buffer, unsigned int size)
544 unsigned int pgrem, rem;
546 db->total_bytes += size;
550 pgrem = ((~db->rdptr) & (PAGE_SIZE-1)) + 1;
553 rem = db->dmasize - db->rdptr;
556 memcpy(buffer, (db->sgbuf[db->rdptr >> PAGE_SHIFT]) + (db->rdptr & (PAGE_SIZE-1)), pgrem);
560 if (db->rdptr >= db->dmasize)
565 static int dmabuf_copyin_user(struct dmabuf *db, unsigned int ptr, const void __user *buffer, unsigned int size)
567 unsigned int pgrem, rem;
569 if (!db->ready || db->mapped)
574 pgrem = ((~ptr) & (PAGE_SIZE-1)) + 1;
577 rem = db->dmasize - ptr;
580 if (copy_from_user((db->sgbuf[ptr >> PAGE_SHIFT]) + (ptr & (PAGE_SIZE-1)), buffer, pgrem))
585 if (ptr >= db->dmasize)
590 static int dmabuf_copyout_user(struct dmabuf *db, unsigned int ptr, void __user *buffer, unsigned int size)
592 unsigned int pgrem, rem;
594 if (!db->ready || db->mapped)
599 pgrem = ((~ptr) & (PAGE_SIZE-1)) + 1;
602 rem = db->dmasize - ptr;
605 if (copy_to_user(buffer, (db->sgbuf[ptr >> PAGE_SHIFT]) + (ptr & (PAGE_SIZE-1)), pgrem))
610 if (ptr >= db->dmasize)
615 /* --------------------------------------------------------------------- */
617 * USB I/O code. We do sample format conversion if necessary
620 static void usbin_stop(struct usb_audiodev *as)
622 struct usbin *u = &as->usbin;
624 unsigned int i, notkilled = 1;
626 spin_lock_irqsave(&as->lock, flags);
627 u->flags &= ~FLG_RUNNING;
629 spin_unlock_irqrestore(&as->lock, flags);
630 while (i & (FLG_URB0RUNNING|FLG_URB1RUNNING|FLG_SYNC0RUNNING|FLG_SYNC1RUNNING)) {
631 set_current_state(notkilled ? TASK_INTERRUPTIBLE : TASK_UNINTERRUPTIBLE);
633 spin_lock_irqsave(&as->lock, flags);
635 spin_unlock_irqrestore(&as->lock, flags);
636 if (notkilled && signal_pending(current)) {
637 if (i & FLG_URB0RUNNING)
638 usb_unlink_urb(u->durb[0].urb);
639 if (i & FLG_URB1RUNNING)
640 usb_unlink_urb(u->durb[1].urb);
641 if (i & FLG_SYNC0RUNNING)
642 usb_unlink_urb(u->surb[0].urb);
643 if (i & FLG_SYNC1RUNNING)
644 usb_unlink_urb(u->surb[1].urb);
648 set_current_state(TASK_RUNNING);
649 if (u->durb[0].urb->transfer_buffer)
650 kfree(u->durb[0].urb->transfer_buffer);
651 if (u->durb[1].urb->transfer_buffer)
652 kfree(u->durb[1].urb->transfer_buffer);
653 if (u->surb[0].urb->transfer_buffer)
654 kfree(u->surb[0].urb->transfer_buffer);
655 if (u->surb[1].urb->transfer_buffer)
656 kfree(u->surb[1].urb->transfer_buffer);
657 u->durb[0].urb->transfer_buffer = u->durb[1].urb->transfer_buffer =
658 u->surb[0].urb->transfer_buffer = u->surb[1].urb->transfer_buffer = NULL;
661 static inline void usbin_release(struct usb_audiodev *as)
666 static void usbin_disc(struct usb_audiodev *as)
668 struct usbin *u = &as->usbin;
672 spin_lock_irqsave(&as->lock, flags);
673 u->flags &= ~(FLG_RUNNING | FLG_CONNECTED);
674 spin_unlock_irqrestore(&as->lock, flags);
678 static void conversion(const void *ibuf, unsigned int ifmt, void *obuf, unsigned int ofmt, void *tmp, unsigned int scnt)
685 if (AFMT_ISSTEREO(ifmt))
687 sp = ((__s16 *)tmp) + cnt;
688 switch (ifmt & ~AFMT_STEREO) {
690 for (bp = ((unsigned char *)ibuf)+cnt, i = 0; i < cnt; i++) {
693 *sp = (*bp ^ 0x80) << 8;
698 for (bp = ((unsigned char *)ibuf)+cnt, i = 0; i < cnt; i++) {
706 for (bp = ((unsigned char *)ibuf)+2*cnt, i = 0; i < cnt; i++) {
709 *sp = (bp[0] | (bp[1] << 8)) ^ 0x8000;
714 for (bp = ((unsigned char *)ibuf)+2*cnt, i = 0; i < cnt; i++) {
717 *sp = (bp[1] | (bp[0] << 8)) ^ 0x8000;
722 for (bp = ((unsigned char *)ibuf)+2*cnt, i = 0; i < cnt; i++) {
725 *sp = bp[0] | (bp[1] << 8);
730 for (bp = ((unsigned char *)ibuf)+2*cnt, i = 0; i < cnt; i++) {
733 *sp = bp[1] | (bp[0] << 8);
737 if (!AFMT_ISSTEREO(ifmt) && AFMT_ISSTEREO(ofmt)) {
738 /* expand from mono to stereo */
739 for (sp = ((__s16 *)tmp)+scnt, sp2 = ((__s16 *)tmp)+2*scnt, i = 0; i < scnt; i++) {
742 sp2[0] = sp2[1] = sp[0];
745 if (AFMT_ISSTEREO(ifmt) && !AFMT_ISSTEREO(ofmt)) {
746 /* contract from stereo to mono */
747 for (sp = sp2 = ((__s16 *)tmp), i = 0; i < scnt; i++, sp++, sp2 += 2)
748 sp[0] = (sp2[0] + sp2[1]) >> 1;
751 if (AFMT_ISSTEREO(ofmt))
754 bp = ((unsigned char *)obuf);
755 switch (ofmt & ~AFMT_STEREO) {
757 for (i = 0; i < cnt; i++, sp++, bp++)
758 *bp = (*sp >> 8) ^ 0x80;
762 for (i = 0; i < cnt; i++, sp++, bp++)
767 for (i = 0; i < cnt; i++, sp++, bp += 2) {
770 bp[1] = (s >> 8) ^ 0x80;
775 for (i = 0; i < cnt; i++, sp++, bp += 2) {
778 bp[0] = (s >> 8) ^ 0x80;
783 for (i = 0; i < cnt; i++, sp++, bp += 2) {
791 for (i = 0; i < cnt; i++, sp++, bp += 2) {
801 static void usbin_convert(struct usbin *u, unsigned char *buffer, unsigned int samples)
807 unsigned int scnt, maxs, ufmtsh, dfmtsh;
809 ufmtsh = AFMT_BYTESSHIFT(u->format);
810 dfmtsh = AFMT_BYTESSHIFT(u->dma.format);
811 maxs = (AFMT_ISSTEREO(u->dma.format | u->format)) ? 32 : 64;
812 while (samples > 0) {
816 conversion(buffer, u->format, tmp.b, u->dma.format, tmp.b, scnt);
817 dmabuf_copyin(&u->dma, tmp.b, scnt << dfmtsh);
818 buffer += scnt << ufmtsh;
823 static int usbin_prepare_desc(struct usbin *u, struct urb *urb)
825 unsigned int i, maxsize, offs;
827 maxsize = (u->freqmax + 0x3fff) >> (14 - AFMT_BYTESSHIFT(u->format));
828 //printk(KERN_DEBUG "usbin_prepare_desc: maxsize %d freq 0x%x format 0x%x\n", maxsize, u->freqn, u->format);
829 for (i = offs = 0; i < DESCFRAMES; i++, offs += maxsize) {
830 urb->iso_frame_desc[i].length = maxsize;
831 urb->iso_frame_desc[i].offset = offs;
838 * return value: 0 if descriptor should be restarted, -1 otherwise
839 * convert sample format on the fly if necessary
841 static int usbin_retire_desc(struct usbin *u, struct urb *urb)
843 unsigned int i, ufmtsh, dfmtsh, err = 0, cnt, scnt, dmafree;
846 ufmtsh = AFMT_BYTESSHIFT(u->format);
847 dfmtsh = AFMT_BYTESSHIFT(u->dma.format);
848 for (i = 0; i < DESCFRAMES; i++) {
849 cp = ((unsigned char *)urb->transfer_buffer) + urb->iso_frame_desc[i].offset;
850 if (urb->iso_frame_desc[i].status) {
851 dprintk((KERN_DEBUG "usbin_retire_desc: frame %u status %d\n", i, urb->iso_frame_desc[i].status));
854 scnt = urb->iso_frame_desc[i].actual_length >> ufmtsh;
857 cnt = scnt << dfmtsh;
858 if (!u->dma.mapped) {
859 dmafree = u->dma.dmasize - u->dma.count;
861 scnt = dmafree >> dfmtsh;
862 cnt = scnt << dfmtsh;
867 if (u->format == u->dma.format) {
868 /* we do not need format conversion */
869 dprintk((KERN_DEBUG "usbaudio: no sample format conversion\n"));
870 dmabuf_copyin(&u->dma, cp, cnt);
872 /* we need sampling format conversion */
873 dprintk((KERN_DEBUG "usbaudio: sample format conversion %x != %x\n", u->format, u->dma.format));
874 usbin_convert(u, cp, scnt);
879 if (u->dma.count >= (signed)u->dma.fragsize)
880 wake_up(&u->dma.wait);
884 static void usbin_completed(struct urb *urb, struct pt_regs *regs)
886 struct usb_audiodev *as = (struct usb_audiodev *)urb->context;
887 struct usbin *u = &as->usbin;
893 printk(KERN_DEBUG "usbin_completed: status %d errcnt %d flags 0x%x\n", urb->status, urb->error_count, u->flags);
895 if (urb == u->durb[0].urb)
896 mask = FLG_URB0RUNNING;
897 else if (urb == u->durb[1].urb)
898 mask = FLG_URB1RUNNING;
901 printk(KERN_ERR "usbin_completed: panic: unknown URB\n");
903 urb->dev = as->state->usbdev;
904 spin_lock_irqsave(&as->lock, flags);
905 if (!usbin_retire_desc(u, urb) &&
906 u->flags & FLG_RUNNING &&
907 !usbin_prepare_desc(u, urb) &&
908 (suret = usb_submit_urb(urb, GFP_ATOMIC)) == 0) {
911 u->flags &= ~(mask | FLG_RUNNING);
912 wake_up(&u->dma.wait);
913 printk(KERN_DEBUG "usbin_completed: descriptor not restarted (usb_submit_urb: %d)\n", suret);
915 spin_unlock_irqrestore(&as->lock, flags);
919 * we output sync data
921 static int usbin_sync_prepare_desc(struct usbin *u, struct urb *urb)
923 unsigned char *cp = urb->transfer_buffer;
924 unsigned int i, offs;
926 for (i = offs = 0; i < SYNCFRAMES; i++, offs += 3, cp += 3) {
927 urb->iso_frame_desc[i].length = 3;
928 urb->iso_frame_desc[i].offset = offs;
930 cp[1] = u->freqn >> 8;
931 cp[2] = u->freqn >> 16;
938 * return value: 0 if descriptor should be restarted, -1 otherwise
940 static int usbin_sync_retire_desc(struct usbin *u, struct urb *urb)
944 for (i = 0; i < SYNCFRAMES; i++)
945 if (urb->iso_frame_desc[0].status)
946 dprintk((KERN_DEBUG "usbin_sync_retire_desc: frame %u status %d\n", i, urb->iso_frame_desc[i].status));
950 static void usbin_sync_completed(struct urb *urb, struct pt_regs *regs)
952 struct usb_audiodev *as = (struct usb_audiodev *)urb->context;
953 struct usbin *u = &as->usbin;
959 printk(KERN_DEBUG "usbin_sync_completed: status %d errcnt %d flags 0x%x\n", urb->status, urb->error_count, u->flags);
961 if (urb == u->surb[0].urb)
962 mask = FLG_SYNC0RUNNING;
963 else if (urb == u->surb[1].urb)
964 mask = FLG_SYNC1RUNNING;
967 printk(KERN_ERR "usbin_sync_completed: panic: unknown URB\n");
969 urb->dev = as->state->usbdev;
970 spin_lock_irqsave(&as->lock, flags);
971 if (!usbin_sync_retire_desc(u, urb) &&
972 u->flags & FLG_RUNNING &&
973 !usbin_sync_prepare_desc(u, urb) &&
974 (suret = usb_submit_urb(urb, GFP_ATOMIC)) == 0) {
977 u->flags &= ~(mask | FLG_RUNNING);
978 wake_up(&u->dma.wait);
979 dprintk((KERN_DEBUG "usbin_sync_completed: descriptor not restarted (usb_submit_urb: %d)\n", suret));
981 spin_unlock_irqrestore(&as->lock, flags);
984 static int usbin_start(struct usb_audiodev *as)
986 struct usb_device *dev = as->state->usbdev;
987 struct usbin *u = &as->usbin;
990 unsigned int maxsze, bufsz;
993 printk(KERN_DEBUG "usbin_start: device %d ufmt 0x%08x dfmt 0x%08x srate %d\n",
994 dev->devnum, u->format, u->dma.format, u->dma.srate);
996 /* allocate USB storage if not already done */
997 spin_lock_irqsave(&as->lock, flags);
998 if (!(u->flags & FLG_CONNECTED)) {
999 spin_unlock_irqrestore(&as->lock, flags);
1002 if (!(u->flags & FLG_RUNNING)) {
1003 spin_unlock_irqrestore(&as->lock, flags);
1004 u->freqn = ((u->dma.srate << 11) + 62) / 125; /* this will overflow at approx 2MSPS */
1005 u->freqmax = u->freqn + (u->freqn >> 2);
1007 maxsze = (u->freqmax + 0x3fff) >> (14 - AFMT_BYTESSHIFT(u->format));
1008 bufsz = DESCFRAMES * maxsze;
1009 if (u->durb[0].urb->transfer_buffer)
1010 kfree(u->durb[0].urb->transfer_buffer);
1011 u->durb[0].urb->transfer_buffer = kmalloc(bufsz, GFP_KERNEL);
1012 u->durb[0].urb->transfer_buffer_length = bufsz;
1013 if (u->durb[1].urb->transfer_buffer)
1014 kfree(u->durb[1].urb->transfer_buffer);
1015 u->durb[1].urb->transfer_buffer = kmalloc(bufsz, GFP_KERNEL);
1016 u->durb[1].urb->transfer_buffer_length = bufsz;
1018 if (u->surb[0].urb->transfer_buffer)
1019 kfree(u->surb[0].urb->transfer_buffer);
1020 u->surb[0].urb->transfer_buffer = kmalloc(3*SYNCFRAMES, GFP_KERNEL);
1021 u->surb[0].urb->transfer_buffer_length = 3*SYNCFRAMES;
1022 if (u->surb[1].urb->transfer_buffer)
1023 kfree(u->surb[1].urb->transfer_buffer);
1024 u->surb[1].urb->transfer_buffer = kmalloc(3*SYNCFRAMES, GFP_KERNEL);
1025 u->surb[1].urb->transfer_buffer_length = 3*SYNCFRAMES;
1027 if (!u->durb[0].urb->transfer_buffer || !u->durb[1].urb->transfer_buffer ||
1028 (u->syncpipe && (!u->surb[0].urb->transfer_buffer || !u->surb[1].urb->transfer_buffer))) {
1029 printk(KERN_ERR "usbaudio: cannot start playback device %d\n", dev->devnum);
1032 spin_lock_irqsave(&as->lock, flags);
1034 if (u->dma.count >= u->dma.dmasize && !u->dma.mapped) {
1035 spin_unlock_irqrestore(&as->lock, flags);
1038 u->flags |= FLG_RUNNING;
1039 if (!(u->flags & FLG_URB0RUNNING)) {
1040 urb = u->durb[0].urb;
1042 urb->pipe = u->datapipe;
1043 urb->transfer_flags = URB_ISO_ASAP;
1044 urb->number_of_packets = DESCFRAMES;
1046 urb->complete = usbin_completed;
1047 if (!usbin_prepare_desc(u, urb) && !usb_submit_urb(urb, GFP_KERNEL))
1048 u->flags |= FLG_URB0RUNNING;
1050 u->flags &= ~FLG_RUNNING;
1052 if (u->flags & FLG_RUNNING && !(u->flags & FLG_URB1RUNNING)) {
1053 urb = u->durb[1].urb;
1055 urb->pipe = u->datapipe;
1056 urb->transfer_flags = URB_ISO_ASAP;
1057 urb->number_of_packets = DESCFRAMES;
1059 urb->complete = usbin_completed;
1060 if (!usbin_prepare_desc(u, urb) && !usb_submit_urb(urb, GFP_KERNEL))
1061 u->flags |= FLG_URB1RUNNING;
1063 u->flags &= ~FLG_RUNNING;
1066 if (u->flags & FLG_RUNNING && !(u->flags & FLG_SYNC0RUNNING)) {
1067 urb = u->surb[0].urb;
1069 urb->pipe = u->syncpipe;
1070 urb->transfer_flags = URB_ISO_ASAP;
1071 urb->number_of_packets = SYNCFRAMES;
1073 urb->complete = usbin_sync_completed;
1074 /* stride: u->syncinterval */
1075 if (!usbin_sync_prepare_desc(u, urb) && !usb_submit_urb(urb, GFP_KERNEL))
1076 u->flags |= FLG_SYNC0RUNNING;
1078 u->flags &= ~FLG_RUNNING;
1080 if (u->flags & FLG_RUNNING && !(u->flags & FLG_SYNC1RUNNING)) {
1081 urb = u->surb[1].urb;
1083 urb->pipe = u->syncpipe;
1084 urb->transfer_flags = URB_ISO_ASAP;
1085 urb->number_of_packets = SYNCFRAMES;
1087 urb->complete = usbin_sync_completed;
1088 /* stride: u->syncinterval */
1089 if (!usbin_sync_prepare_desc(u, urb) && !usb_submit_urb(urb, GFP_KERNEL))
1090 u->flags |= FLG_SYNC1RUNNING;
1092 u->flags &= ~FLG_RUNNING;
1095 spin_unlock_irqrestore(&as->lock, flags);
1099 static void usbout_stop(struct usb_audiodev *as)
1101 struct usbout *u = &as->usbout;
1102 unsigned long flags;
1103 unsigned int i, notkilled = 1;
1105 spin_lock_irqsave(&as->lock, flags);
1106 u->flags &= ~FLG_RUNNING;
1108 spin_unlock_irqrestore(&as->lock, flags);
1109 while (i & (FLG_URB0RUNNING|FLG_URB1RUNNING|FLG_SYNC0RUNNING|FLG_SYNC1RUNNING)) {
1110 set_current_state(notkilled ? TASK_INTERRUPTIBLE : TASK_UNINTERRUPTIBLE);
1111 schedule_timeout(1);
1112 spin_lock_irqsave(&as->lock, flags);
1114 spin_unlock_irqrestore(&as->lock, flags);
1115 if (notkilled && signal_pending(current)) {
1116 if (i & FLG_URB0RUNNING)
1117 usb_unlink_urb(u->durb[0].urb);
1118 if (i & FLG_URB1RUNNING)
1119 usb_unlink_urb(u->durb[1].urb);
1120 if (i & FLG_SYNC0RUNNING)
1121 usb_unlink_urb(u->surb[0].urb);
1122 if (i & FLG_SYNC1RUNNING)
1123 usb_unlink_urb(u->surb[1].urb);
1127 set_current_state(TASK_RUNNING);
1128 if (u->durb[0].urb->transfer_buffer)
1129 kfree(u->durb[0].urb->transfer_buffer);
1130 if (u->durb[1].urb->transfer_buffer)
1131 kfree(u->durb[1].urb->transfer_buffer);
1132 if (u->surb[0].urb->transfer_buffer)
1133 kfree(u->surb[0].urb->transfer_buffer);
1134 if (u->surb[1].urb->transfer_buffer)
1135 kfree(u->surb[1].urb->transfer_buffer);
1136 u->durb[0].urb->transfer_buffer = u->durb[1].urb->transfer_buffer =
1137 u->surb[0].urb->transfer_buffer = u->surb[1].urb->transfer_buffer = NULL;
1140 static inline void usbout_release(struct usb_audiodev *as)
1145 static void usbout_disc(struct usb_audiodev *as)
1147 struct usbout *u = &as->usbout;
1148 unsigned long flags;
1150 spin_lock_irqsave(&as->lock, flags);
1151 u->flags &= ~(FLG_RUNNING | FLG_CONNECTED);
1152 spin_unlock_irqrestore(&as->lock, flags);
1156 static void usbout_convert(struct usbout *u, unsigned char *buffer, unsigned int samples)
1162 unsigned int scnt, maxs, ufmtsh, dfmtsh;
1164 ufmtsh = AFMT_BYTESSHIFT(u->format);
1165 dfmtsh = AFMT_BYTESSHIFT(u->dma.format);
1166 maxs = (AFMT_ISSTEREO(u->dma.format | u->format)) ? 32 : 64;
1167 while (samples > 0) {
1171 dmabuf_copyout(&u->dma, tmp.b, scnt << dfmtsh);
1172 conversion(tmp.b, u->dma.format, buffer, u->format, tmp.b, scnt);
1173 buffer += scnt << ufmtsh;
1178 static int usbout_prepare_desc(struct usbout *u, struct urb *urb)
1180 unsigned int i, ufmtsh, dfmtsh, err = 0, cnt, scnt, offs;
1181 unsigned char *cp = urb->transfer_buffer;
1183 ufmtsh = AFMT_BYTESSHIFT(u->format);
1184 dfmtsh = AFMT_BYTESSHIFT(u->dma.format);
1185 for (i = offs = 0; i < DESCFRAMES; i++) {
1186 urb->iso_frame_desc[i].offset = offs;
1187 u->phase = (u->phase & 0x3fff) + u->freqm;
1188 scnt = u->phase >> 14;
1190 urb->iso_frame_desc[i].length = 0;
1193 cnt = scnt << dfmtsh;
1194 if (!u->dma.mapped) {
1195 if (cnt > u->dma.count) {
1196 scnt = u->dma.count >> dfmtsh;
1197 cnt = scnt << dfmtsh;
1200 u->dma.count -= cnt;
1202 u->dma.count += cnt;
1203 if (u->format == u->dma.format) {
1204 /* we do not need format conversion */
1205 dmabuf_copyout(&u->dma, cp, cnt);
1207 /* we need sampling format conversion */
1208 usbout_convert(u, cp, scnt);
1210 cnt = scnt << ufmtsh;
1211 urb->iso_frame_desc[i].length = cnt;
1218 if (u->dma.mapped) {
1219 if (u->dma.count >= (signed)u->dma.fragsize)
1220 wake_up(&u->dma.wait);
1222 if ((signed)u->dma.dmasize >= u->dma.count + (signed)u->dma.fragsize)
1223 wake_up(&u->dma.wait);
1225 return err ? -1 : 0;
1229 * return value: 0 if descriptor should be restarted, -1 otherwise
1231 static int usbout_retire_desc(struct usbout *u, struct urb *urb)
1235 for (i = 0; i < DESCFRAMES; i++) {
1236 if (urb->iso_frame_desc[i].status) {
1237 dprintk((KERN_DEBUG "usbout_retire_desc: frame %u status %d\n", i, urb->iso_frame_desc[i].status));
1244 static void usbout_completed(struct urb *urb, struct pt_regs *regs)
1246 struct usb_audiodev *as = (struct usb_audiodev *)urb->context;
1247 struct usbout *u = &as->usbout;
1248 unsigned long flags;
1253 printk(KERN_DEBUG "usbout_completed: status %d errcnt %d flags 0x%x\n", urb->status, urb->error_count, u->flags);
1255 if (urb == u->durb[0].urb)
1256 mask = FLG_URB0RUNNING;
1257 else if (urb == u->durb[1].urb)
1258 mask = FLG_URB1RUNNING;
1261 printk(KERN_ERR "usbout_completed: panic: unknown URB\n");
1263 urb->dev = as->state->usbdev;
1264 spin_lock_irqsave(&as->lock, flags);
1265 if (!usbout_retire_desc(u, urb) &&
1266 u->flags & FLG_RUNNING &&
1267 !usbout_prepare_desc(u, urb) &&
1268 (suret = usb_submit_urb(urb, GFP_ATOMIC)) == 0) {
1271 u->flags &= ~(mask | FLG_RUNNING);
1272 wake_up(&u->dma.wait);
1273 dprintk((KERN_DEBUG "usbout_completed: descriptor not restarted (usb_submit_urb: %d)\n", suret));
1275 spin_unlock_irqrestore(&as->lock, flags);
1278 static int usbout_sync_prepare_desc(struct usbout *u, struct urb *urb)
1280 unsigned int i, offs;
1282 for (i = offs = 0; i < SYNCFRAMES; i++, offs += 3) {
1283 urb->iso_frame_desc[i].length = 3;
1284 urb->iso_frame_desc[i].offset = offs;
1291 * return value: 0 if descriptor should be restarted, -1 otherwise
1293 static int usbout_sync_retire_desc(struct usbout *u, struct urb *urb)
1295 unsigned char *cp = urb->transfer_buffer;
1298 for (i = 0; i < SYNCFRAMES; i++, cp += 3) {
1299 if (urb->iso_frame_desc[i].status) {
1300 dprintk((KERN_DEBUG "usbout_sync_retire_desc: frame %u status %d\n", i, urb->iso_frame_desc[i].status));
1303 if (urb->iso_frame_desc[i].actual_length < 3) {
1304 dprintk((KERN_DEBUG "usbout_sync_retire_desc: frame %u length %d\n", i, urb->iso_frame_desc[i].actual_length));
1307 f = cp[0] | (cp[1] << 8) | (cp[2] << 16);
1308 if (abs(f - u->freqn) > (u->freqn >> 3) || f > u->freqmax) {
1309 printk(KERN_WARNING "usbout_sync_retire_desc: requested frequency %u (nominal %u) out of range!\n", f, u->freqn);
1317 static void usbout_sync_completed(struct urb *urb, struct pt_regs *regs)
1319 struct usb_audiodev *as = (struct usb_audiodev *)urb->context;
1320 struct usbout *u = &as->usbout;
1321 unsigned long flags;
1326 printk(KERN_DEBUG "usbout_sync_completed: status %d errcnt %d flags 0x%x\n", urb->status, urb->error_count, u->flags);
1328 if (urb == u->surb[0].urb)
1329 mask = FLG_SYNC0RUNNING;
1330 else if (urb == u->surb[1].urb)
1331 mask = FLG_SYNC1RUNNING;
1334 printk(KERN_ERR "usbout_sync_completed: panic: unknown URB\n");
1336 urb->dev = as->state->usbdev;
1337 spin_lock_irqsave(&as->lock, flags);
1338 if (!usbout_sync_retire_desc(u, urb) &&
1339 u->flags & FLG_RUNNING &&
1340 !usbout_sync_prepare_desc(u, urb) &&
1341 (suret = usb_submit_urb(urb, GFP_ATOMIC)) == 0) {
1344 u->flags &= ~(mask | FLG_RUNNING);
1345 wake_up(&u->dma.wait);
1346 dprintk((KERN_DEBUG "usbout_sync_completed: descriptor not restarted (usb_submit_urb: %d)\n", suret));
1348 spin_unlock_irqrestore(&as->lock, flags);
1351 static int usbout_start(struct usb_audiodev *as)
1353 struct usb_device *dev = as->state->usbdev;
1354 struct usbout *u = &as->usbout;
1356 unsigned long flags;
1357 unsigned int maxsze, bufsz;
1360 printk(KERN_DEBUG "usbout_start: device %d ufmt 0x%08x dfmt 0x%08x srate %d\n",
1361 dev->devnum, u->format, u->dma.format, u->dma.srate);
1363 /* allocate USB storage if not already done */
1364 spin_lock_irqsave(&as->lock, flags);
1365 if (!(u->flags & FLG_CONNECTED)) {
1366 spin_unlock_irqrestore(&as->lock, flags);
1369 if (!(u->flags & FLG_RUNNING)) {
1370 spin_unlock_irqrestore(&as->lock, flags);
1371 u->freqn = u->freqm = ((u->dma.srate << 11) + 62) / 125; /* this will overflow at approx 2MSPS */
1372 u->freqmax = u->freqn + (u->freqn >> 2);
1374 maxsze = (u->freqmax + 0x3fff) >> (14 - AFMT_BYTESSHIFT(u->format));
1375 bufsz = DESCFRAMES * maxsze;
1376 if (u->durb[0].urb->transfer_buffer)
1377 kfree(u->durb[0].urb->transfer_buffer);
1378 u->durb[0].urb->transfer_buffer = kmalloc(bufsz, GFP_KERNEL);
1379 u->durb[0].urb->transfer_buffer_length = bufsz;
1380 if (u->durb[1].urb->transfer_buffer)
1381 kfree(u->durb[1].urb->transfer_buffer);
1382 u->durb[1].urb->transfer_buffer = kmalloc(bufsz, GFP_KERNEL);
1383 u->durb[1].urb->transfer_buffer_length = bufsz;
1385 if (u->surb[0].urb->transfer_buffer)
1386 kfree(u->surb[0].urb->transfer_buffer);
1387 u->surb[0].urb->transfer_buffer = kmalloc(3*SYNCFRAMES, GFP_KERNEL);
1388 u->surb[0].urb->transfer_buffer_length = 3*SYNCFRAMES;
1389 if (u->surb[1].urb->transfer_buffer)
1390 kfree(u->surb[1].urb->transfer_buffer);
1391 u->surb[1].urb->transfer_buffer = kmalloc(3*SYNCFRAMES, GFP_KERNEL);
1392 u->surb[1].urb->transfer_buffer_length = 3*SYNCFRAMES;
1394 if (!u->durb[0].urb->transfer_buffer || !u->durb[1].urb->transfer_buffer ||
1395 (u->syncpipe && (!u->surb[0].urb->transfer_buffer || !u->surb[1].urb->transfer_buffer))) {
1396 printk(KERN_ERR "usbaudio: cannot start playback device %d\n", dev->devnum);
1399 spin_lock_irqsave(&as->lock, flags);
1401 if (u->dma.count <= 0 && !u->dma.mapped) {
1402 spin_unlock_irqrestore(&as->lock, flags);
1405 u->flags |= FLG_RUNNING;
1406 if (!(u->flags & FLG_URB0RUNNING)) {
1407 urb = u->durb[0].urb;
1409 urb->pipe = u->datapipe;
1410 urb->transfer_flags = URB_ISO_ASAP;
1411 urb->number_of_packets = DESCFRAMES;
1413 urb->complete = usbout_completed;
1414 if (!usbout_prepare_desc(u, urb) && !usb_submit_urb(urb, GFP_ATOMIC))
1415 u->flags |= FLG_URB0RUNNING;
1417 u->flags &= ~FLG_RUNNING;
1419 if (u->flags & FLG_RUNNING && !(u->flags & FLG_URB1RUNNING)) {
1420 urb = u->durb[1].urb;
1422 urb->pipe = u->datapipe;
1423 urb->transfer_flags = URB_ISO_ASAP;
1424 urb->number_of_packets = DESCFRAMES;
1426 urb->complete = usbout_completed;
1427 if (!usbout_prepare_desc(u, urb) && !usb_submit_urb(urb, GFP_ATOMIC))
1428 u->flags |= FLG_URB1RUNNING;
1430 u->flags &= ~FLG_RUNNING;
1433 if (u->flags & FLG_RUNNING && !(u->flags & FLG_SYNC0RUNNING)) {
1434 urb = u->surb[0].urb;
1436 urb->pipe = u->syncpipe;
1437 urb->transfer_flags = URB_ISO_ASAP;
1438 urb->number_of_packets = SYNCFRAMES;
1440 urb->complete = usbout_sync_completed;
1441 /* stride: u->syncinterval */
1442 if (!usbout_sync_prepare_desc(u, urb) && !usb_submit_urb(urb, GFP_ATOMIC))
1443 u->flags |= FLG_SYNC0RUNNING;
1445 u->flags &= ~FLG_RUNNING;
1447 if (u->flags & FLG_RUNNING && !(u->flags & FLG_SYNC1RUNNING)) {
1448 urb = u->surb[1].urb;
1450 urb->pipe = u->syncpipe;
1451 urb->transfer_flags = URB_ISO_ASAP;
1452 urb->number_of_packets = SYNCFRAMES;
1454 urb->complete = usbout_sync_completed;
1455 /* stride: u->syncinterval */
1456 if (!usbout_sync_prepare_desc(u, urb) && !usb_submit_urb(urb, GFP_ATOMIC))
1457 u->flags |= FLG_SYNC1RUNNING;
1459 u->flags &= ~FLG_RUNNING;
1462 spin_unlock_irqrestore(&as->lock, flags);
1466 /* --------------------------------------------------------------------- */
1468 static unsigned int format_goodness(struct audioformat *afp, unsigned int fmt, unsigned int srate)
1472 if (srate < afp->sratelo)
1473 g += afp->sratelo - srate;
1474 if (srate > afp->sratehi)
1475 g += srate - afp->sratehi;
1476 if (AFMT_ISSTEREO(afp->format) && !AFMT_ISSTEREO(fmt))
1478 if (!AFMT_ISSTEREO(afp->format) && AFMT_ISSTEREO(fmt))
1480 if (AFMT_IS16BIT(afp->format) && !AFMT_IS16BIT(fmt))
1482 if (!AFMT_IS16BIT(afp->format) && AFMT_IS16BIT(fmt))
1487 static int find_format(struct audioformat *afp, unsigned int nr, unsigned int fmt, unsigned int srate)
1489 unsigned int i, g, gb = ~0;
1490 int j = -1; /* default to failure */
1492 /* find "best" format (according to format_goodness) */
1493 for (i = 0; i < nr; i++) {
1494 g = format_goodness(&afp[i], fmt, srate);
1503 static int set_format_in(struct usb_audiodev *as)
1505 struct usb_device *dev = as->state->usbdev;
1506 struct usb_host_interface *alts;
1507 struct usb_interface *iface;
1508 struct usbin *u = &as->usbin;
1509 struct dmabuf *d = &u->dma;
1510 struct audioformat *fmt;
1512 unsigned char data[3];
1515 iface = usb_ifnum_to_if(dev, u->interface);
1519 fmtnr = find_format(as->fmtin, as->numfmtin, d->format, d->srate);
1521 printk(KERN_ERR "usbaudio: set_format_in(): failed to find desired format/speed combination.\n");
1525 fmt = as->fmtin + fmtnr;
1526 alts = usb_altnum_to_altsetting(iface, fmt->altsetting);
1527 u->format = fmt->format;
1528 u->datapipe = usb_rcvisocpipe(dev, alts->endpoint[0].desc.bEndpointAddress & 0xf);
1529 u->syncpipe = u->syncinterval = 0;
1530 if ((alts->endpoint[0].desc.bmAttributes & 0x0c) == 0x08) {
1531 if (alts->desc.bNumEndpoints < 2 ||
1532 alts->endpoint[1].desc.bmAttributes != 0x01 ||
1533 alts->endpoint[1].desc.bSynchAddress != 0 ||
1534 alts->endpoint[1].desc.bEndpointAddress != (alts->endpoint[0].desc.bSynchAddress & 0x7f)) {
1535 printk(KERN_WARNING "usbaudio: device %d interface %d altsetting %d claims adaptive in "
1536 "but has invalid synch pipe; treating as asynchronous in\n",
1537 dev->devnum, u->interface, fmt->altsetting);
1539 u->syncpipe = usb_sndisocpipe(dev, alts->endpoint[1].desc.bEndpointAddress & 0xf);
1540 u->syncinterval = alts->endpoint[1].desc.bRefresh;
1543 if (d->srate < fmt->sratelo)
1544 d->srate = fmt->sratelo;
1545 if (d->srate > fmt->sratehi)
1546 d->srate = fmt->sratehi;
1547 dprintk((KERN_DEBUG "usbaudio: set_format_in: usb_set_interface %u %u\n",
1548 u->interface, fmt->altsetting));
1549 if (usb_set_interface(dev, alts->desc.bInterfaceNumber, fmt->altsetting) < 0) {
1550 printk(KERN_WARNING "usbaudio: usb_set_interface failed, device %d interface %d altsetting %d\n",
1551 dev->devnum, u->interface, fmt->altsetting);
1554 if (fmt->sratelo == fmt->sratehi)
1556 ep = usb_pipeendpoint(u->datapipe) | (u->datapipe & USB_DIR_IN);
1557 /* if endpoint has pitch control, enable it */
1558 if (fmt->attributes & 0x02) {
1560 if ((ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
1561 PITCH_CONTROL << 8, ep, data, 1, HZ)) < 0) {
1562 printk(KERN_ERR "usbaudio: failure (error %d) to set output pitch control device %d interface %u endpoint 0x%x to %u\n",
1563 ret, dev->devnum, u->interface, ep, d->srate);
1567 /* if endpoint has sampling rate control, set it */
1568 if (fmt->attributes & 0x01) {
1570 data[1] = d->srate >> 8;
1571 data[2] = d->srate >> 16;
1572 if ((ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
1573 SAMPLING_FREQ_CONTROL << 8, ep, data, 3, HZ)) < 0) {
1574 printk(KERN_ERR "usbaudio: failure (error %d) to set input sampling frequency device %d interface %u endpoint 0x%x to %u\n",
1575 ret, dev->devnum, u->interface, ep, d->srate);
1578 if ((ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_IN,
1579 SAMPLING_FREQ_CONTROL << 8, ep, data, 3, HZ)) < 0) {
1580 printk(KERN_ERR "usbaudio: failure (error %d) to get input sampling frequency device %d interface %u endpoint 0x%x\n",
1581 ret, dev->devnum, u->interface, ep);
1584 dprintk((KERN_DEBUG "usbaudio: set_format_in: device %d interface %d altsetting %d srate req: %u real %u\n",
1585 dev->devnum, u->interface, fmt->altsetting, d->srate, data[0] | (data[1] << 8) | (data[2] << 16)));
1586 d->srate = data[0] | (data[1] << 8) | (data[2] << 16);
1588 dprintk((KERN_DEBUG "usbaudio: set_format_in: USB format 0x%x, DMA format 0x%x srate %u\n", u->format, d->format, d->srate));
1592 static int set_format_out(struct usb_audiodev *as)
1594 struct usb_device *dev = as->state->usbdev;
1595 struct usb_host_interface *alts;
1596 struct usb_interface *iface;
1597 struct usbout *u = &as->usbout;
1598 struct dmabuf *d = &u->dma;
1599 struct audioformat *fmt;
1601 unsigned char data[3];
1604 iface = usb_ifnum_to_if(dev, u->interface);
1608 fmtnr = find_format(as->fmtout, as->numfmtout, d->format, d->srate);
1610 printk(KERN_ERR "usbaudio: set_format_out(): failed to find desired format/speed combination.\n");
1614 fmt = as->fmtout + fmtnr;
1615 u->format = fmt->format;
1616 alts = usb_altnum_to_altsetting(iface, fmt->altsetting);
1617 u->datapipe = usb_sndisocpipe(dev, alts->endpoint[0].desc.bEndpointAddress & 0xf);
1618 u->syncpipe = u->syncinterval = 0;
1619 if ((alts->endpoint[0].desc.bmAttributes & 0x0c) == 0x04) {
1621 printk(KERN_DEBUG "bNumEndpoints 0x%02x endpoint[1].bmAttributes 0x%02x\n"
1622 KERN_DEBUG "endpoint[1].bSynchAddress 0x%02x endpoint[1].bEndpointAddress 0x%02x\n"
1623 KERN_DEBUG "endpoint[0].bSynchAddress 0x%02x\n", alts->bNumEndpoints,
1624 alts->endpoint[1].bmAttributes, alts->endpoint[1].bSynchAddress,
1625 alts->endpoint[1].bEndpointAddress, alts->endpoint[0].bSynchAddress);
1627 if (alts->desc.bNumEndpoints < 2 ||
1628 alts->endpoint[1].desc.bmAttributes != 0x01 ||
1629 alts->endpoint[1].desc.bSynchAddress != 0 ||
1630 alts->endpoint[1].desc.bEndpointAddress != (alts->endpoint[0].desc.bSynchAddress | 0x80)) {
1631 printk(KERN_WARNING "usbaudio: device %d interface %d altsetting %d claims asynch out "
1632 "but has invalid synch pipe; treating as adaptive out\n",
1633 dev->devnum, u->interface, fmt->altsetting);
1635 u->syncpipe = usb_rcvisocpipe(dev, alts->endpoint[1].desc.bEndpointAddress & 0xf);
1636 u->syncinterval = alts->endpoint[1].desc.bRefresh;
1639 if (d->srate < fmt->sratelo)
1640 d->srate = fmt->sratelo;
1641 if (d->srate > fmt->sratehi)
1642 d->srate = fmt->sratehi;
1643 dprintk((KERN_DEBUG "usbaudio: set_format_out: usb_set_interface %u %u\n",
1644 u->interface, fmt->altsetting));
1645 if (usb_set_interface(dev, u->interface, fmt->altsetting) < 0) {
1646 printk(KERN_WARNING "usbaudio: usb_set_interface failed, device %d interface %d altsetting %d\n",
1647 dev->devnum, u->interface, fmt->altsetting);
1650 if (fmt->sratelo == fmt->sratehi)
1652 ep = usb_pipeendpoint(u->datapipe) | (u->datapipe & USB_DIR_IN);
1653 /* if endpoint has pitch control, enable it */
1654 if (fmt->attributes & 0x02) {
1656 if ((ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
1657 PITCH_CONTROL << 8, ep, data, 1, HZ)) < 0) {
1658 printk(KERN_ERR "usbaudio: failure (error %d) to set output pitch control device %d interface %u endpoint 0x%x to %u\n",
1659 ret, dev->devnum, u->interface, ep, d->srate);
1663 /* if endpoint has sampling rate control, set it */
1664 if (fmt->attributes & 0x01) {
1666 data[1] = d->srate >> 8;
1667 data[2] = d->srate >> 16;
1668 if ((ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
1669 SAMPLING_FREQ_CONTROL << 8, ep, data, 3, HZ)) < 0) {
1670 printk(KERN_ERR "usbaudio: failure (error %d) to set output sampling frequency device %d interface %u endpoint 0x%x to %u\n",
1671 ret, dev->devnum, u->interface, ep, d->srate);
1674 if ((ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_IN,
1675 SAMPLING_FREQ_CONTROL << 8, ep, data, 3, HZ)) < 0) {
1676 printk(KERN_ERR "usbaudio: failure (error %d) to get output sampling frequency device %d interface %u endpoint 0x%x\n",
1677 ret, dev->devnum, u->interface, ep);
1680 dprintk((KERN_DEBUG "usbaudio: set_format_out: device %d interface %d altsetting %d srate req: %u real %u\n",
1681 dev->devnum, u->interface, fmt->altsetting, d->srate, data[0] | (data[1] << 8) | (data[2] << 16)));
1682 d->srate = data[0] | (data[1] << 8) | (data[2] << 16);
1684 dprintk((KERN_DEBUG "usbaudio: set_format_out: USB format 0x%x, DMA format 0x%x srate %u\n", u->format, d->format, d->srate));
1688 static int set_format(struct usb_audiodev *s, unsigned int fmode, unsigned int fmt, unsigned int srate)
1690 int ret1 = 0, ret2 = 0;
1692 if (!(fmode & (FMODE_READ|FMODE_WRITE)))
1694 if (fmode & FMODE_READ) {
1696 s->usbin.dma.ready = 0;
1697 if (fmt == AFMT_QUERY)
1698 fmt = s->usbin.dma.format;
1700 s->usbin.dma.format = fmt;
1702 srate = s->usbin.dma.srate;
1704 s->usbin.dma.srate = srate;
1706 if (fmode & FMODE_WRITE) {
1708 s->usbout.dma.ready = 0;
1709 if (fmt == AFMT_QUERY)
1710 fmt = s->usbout.dma.format;
1712 s->usbout.dma.format = fmt;
1714 srate = s->usbout.dma.srate;
1716 s->usbout.dma.srate = srate;
1718 if (fmode & FMODE_READ)
1719 ret1 = set_format_in(s);
1720 if (fmode & FMODE_WRITE)
1721 ret2 = set_format_out(s);
1722 return ret1 ? ret1 : ret2;
1725 /* --------------------------------------------------------------------- */
1727 static int wrmixer(struct usb_mixerdev *ms, unsigned mixch, unsigned value)
1729 struct usb_device *dev = ms->state->usbdev;
1730 unsigned char data[2];
1731 struct mixerchannel *ch;
1734 if (mixch >= ms->numch)
1736 ch = &ms->ch[mixch];
1737 v3 = ch->maxval - ch->minval;
1739 v2 = (value >> 8) & 0xff;
1744 if (!(ch->flags & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT)))
1746 ch->value = v1 | (v2 << 8);
1747 v1 = (v1 * v3) / 100 + ch->minval;
1748 v2 = (v2 * v3) / 100 + ch->minval;
1749 switch (ch->selector) {
1750 case 0: /* mixer unit request */
1753 if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
1754 (ch->chnum << 8) | 1, ms->iface | (ch->unitid << 8), data, 2, HZ) < 0)
1756 if (!(ch->flags & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT)))
1760 if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
1761 ((ch->chnum + !!(ch->flags & MIXFLG_STEREOIN)) << 8) | (1 + !!(ch->flags & MIXFLG_STEREOOUT)),
1762 ms->iface | (ch->unitid << 8), data, 2, HZ) < 0)
1766 /* various feature unit controls */
1767 case VOLUME_CONTROL:
1770 if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
1771 (ch->selector << 8) | ch->chnum, ms->iface | (ch->unitid << 8), data, 2, HZ) < 0)
1773 if (!(ch->flags & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT)))
1777 if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
1778 (ch->selector << 8) | (ch->chnum + 1), ms->iface | (ch->unitid << 8), data, 2, HZ) < 0)
1784 case TREBLE_CONTROL:
1786 if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
1787 (ch->selector << 8) | ch->chnum, ms->iface | (ch->unitid << 8), data, 1, HZ) < 0)
1789 if (!(ch->flags & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT)))
1792 if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
1793 (ch->selector << 8) | (ch->chnum + 1), ms->iface | (ch->unitid << 8), data, 1, HZ) < 0)
1803 printk(KERN_ERR "usbaudio: mixer request device %u if %u unit %u ch %u selector %u failed\n",
1804 dev->devnum, ms->iface, ch->unitid, ch->chnum, ch->selector);
1808 static int get_rec_src(struct usb_mixerdev *ms)
1810 struct usb_device *dev = ms->state->usbdev;
1811 unsigned int mask = 0, retmask = 0;
1816 for (i = 0; i < ms->numch; i++) {
1817 if (!ms->ch[i].slctunitid || (mask & (1 << i)))
1819 if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
1820 0, ms->iface | (ms->ch[i].slctunitid << 8), &buf, 1, HZ) < 0) {
1822 printk(KERN_ERR "usbaudio: selector read request device %u if %u unit %u failed\n",
1823 dev->devnum, ms->iface, ms->ch[i].slctunitid & 0xff);
1826 for (j = i; j < ms->numch; j++) {
1827 if ((ms->ch[i].slctunitid ^ ms->ch[j].slctunitid) & 0xff)
1830 if (buf == (ms->ch[j].slctunitid >> 8))
1831 retmask |= 1 << ms->ch[j].osschannel;
1839 static int set_rec_src(struct usb_mixerdev *ms, int srcmask)
1841 struct usb_device *dev = ms->state->usbdev;
1842 unsigned int mask = 0, smask, bmask;
1847 for (i = 0; i < ms->numch; i++) {
1848 if (!ms->ch[i].slctunitid || (mask & (1 << i)))
1850 if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
1851 0, ms->iface | (ms->ch[i].slctunitid << 8), &buf, 1, HZ) < 0) {
1853 printk(KERN_ERR "usbaudio: selector read request device %u if %u unit %u failed\n",
1854 dev->devnum, ms->iface, ms->ch[i].slctunitid & 0xff);
1857 /* first generate smask */
1859 for (j = i; j < ms->numch; j++) {
1860 if ((ms->ch[i].slctunitid ^ ms->ch[j].slctunitid) & 0xff)
1862 smask |= 1 << ms->ch[j].osschannel;
1863 if (buf == (ms->ch[j].slctunitid >> 8))
1864 bmask |= 1 << ms->ch[j].osschannel;
1867 /* check for multiple set sources */
1868 j = hweight32(srcmask & smask);
1873 for (j = i; j < ms->numch; j++) {
1874 if ((ms->ch[i].slctunitid ^ ms->ch[j].slctunitid) & 0xff)
1876 if (!(srcmask & (1 << ms->ch[j].osschannel)))
1878 buf = ms->ch[j].slctunitid >> 8;
1879 if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
1880 0, ms->iface | (ms->ch[j].slctunitid << 8), &buf, 1, HZ) < 0) {
1882 printk(KERN_ERR "usbaudio: selector write request device %u if %u unit %u failed\n",
1883 dev->devnum, ms->iface, ms->ch[j].slctunitid & 0xff);
1888 return err ? -EIO : 0;
1891 /* --------------------------------------------------------------------- */
1894 * should be called with open_sem hold, so that no new processes
1895 * look at the audio device to be destroyed
1898 static void release(struct usb_audio_state *s)
1900 struct usb_audiodev *as;
1901 struct usb_mixerdev *ms;
1909 wake_up(&open_wait);
1910 while (!list_empty(&s->audiolist)) {
1911 as = list_entry(s->audiolist.next, struct usb_audiodev, list);
1912 list_del(&as->list);
1915 dmabuf_release(&as->usbin.dma);
1916 dmabuf_release(&as->usbout.dma);
1917 usb_free_urb(as->usbin.durb[0].urb);
1918 usb_free_urb(as->usbin.durb[1].urb);
1919 usb_free_urb(as->usbin.surb[0].urb);
1920 usb_free_urb(as->usbin.surb[1].urb);
1921 usb_free_urb(as->usbout.durb[0].urb);
1922 usb_free_urb(as->usbout.durb[1].urb);
1923 usb_free_urb(as->usbout.surb[0].urb);
1924 usb_free_urb(as->usbout.surb[1].urb);
1927 while (!list_empty(&s->mixerlist)) {
1928 ms = list_entry(s->mixerlist.next, struct usb_mixerdev, list);
1929 list_del(&ms->list);
1935 static inline int prog_dmabuf_in(struct usb_audiodev *as)
1938 return dmabuf_init(&as->usbin.dma);
1941 static inline int prog_dmabuf_out(struct usb_audiodev *as)
1944 return dmabuf_init(&as->usbout.dma);
1947 /* --------------------------------------------------------------------- */
1949 static int usb_audio_open_mixdev(struct inode *inode, struct file *file)
1951 unsigned int minor = iminor(inode);
1952 struct list_head *devs, *mdevs;
1953 struct usb_mixerdev *ms;
1954 struct usb_audio_state *s;
1957 for (devs = audiodevs.next; devs != &audiodevs; devs = devs->next) {
1958 s = list_entry(devs, struct usb_audio_state, audiodev);
1959 for (mdevs = s->mixerlist.next; mdevs != &s->mixerlist; mdevs = mdevs->next) {
1960 ms = list_entry(mdevs, struct usb_mixerdev, list);
1961 if (ms->dev_mixer == minor)
1973 file->private_data = ms;
1977 return nonseekable_open(inode, file);
1980 static int usb_audio_release_mixdev(struct inode *inode, struct file *file)
1982 struct usb_mixerdev *ms = (struct usb_mixerdev *)file->private_data;
1983 struct usb_audio_state *s;
1993 static int usb_audio_ioctl_mixdev(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
1995 struct usb_mixerdev *ms = (struct usb_mixerdev *)file->private_data;
1997 int __user *user_arg = (int __user *)arg;
1999 if (!ms->state->usbdev)
2002 if (cmd == SOUND_MIXER_INFO) {
2005 memset(&info, 0, sizeof(info));
2006 strncpy(info.id, "USB_AUDIO", sizeof(info.id));
2007 strncpy(info.name, "USB Audio Class Driver", sizeof(info.name));
2008 info.modify_counter = ms->modcnt;
2009 if (copy_to_user((void __user *)arg, &info, sizeof(info)))
2013 if (cmd == SOUND_OLD_MIXER_INFO) {
2014 _old_mixer_info info;
2016 memset(&info, 0, sizeof(info));
2017 strncpy(info.id, "USB_AUDIO", sizeof(info.id));
2018 strncpy(info.name, "USB Audio Class Driver", sizeof(info.name));
2019 if (copy_to_user((void __user *)arg, &info, sizeof(info)))
2023 if (cmd == OSS_GETVERSION)
2024 return put_user(SOUND_VERSION, user_arg);
2025 if (_IOC_TYPE(cmd) != 'M' || _IOC_SIZE(cmd) != sizeof(int))
2027 if (_IOC_DIR(cmd) == _IOC_READ) {
2028 switch (_IOC_NR(cmd)) {
2029 case SOUND_MIXER_RECSRC: /* Arg contains a bit for each recording source */
2030 val = get_rec_src(ms);
2033 return put_user(val, user_arg);
2035 case SOUND_MIXER_DEVMASK: /* Arg contains a bit for each supported device */
2036 for (val = i = 0; i < ms->numch; i++)
2037 val |= 1 << ms->ch[i].osschannel;
2038 return put_user(val, user_arg);
2040 case SOUND_MIXER_RECMASK: /* Arg contains a bit for each supported recording source */
2041 for (val = i = 0; i < ms->numch; i++)
2042 if (ms->ch[i].slctunitid)
2043 val |= 1 << ms->ch[i].osschannel;
2044 return put_user(val, user_arg);
2046 case SOUND_MIXER_STEREODEVS: /* Mixer channels supporting stereo */
2047 for (val = i = 0; i < ms->numch; i++)
2048 if (ms->ch[i].flags & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT))
2049 val |= 1 << ms->ch[i].osschannel;
2050 return put_user(val, user_arg);
2052 case SOUND_MIXER_CAPS:
2053 return put_user(SOUND_CAP_EXCL_INPUT, user_arg);
2057 if (i >= SOUND_MIXER_NRDEVICES)
2059 for (j = 0; j < ms->numch; j++) {
2060 if (ms->ch[j].osschannel == i) {
2061 return put_user(ms->ch[j].value, user_arg);
2067 if (_IOC_DIR(cmd) != (_IOC_READ|_IOC_WRITE))
2070 switch (_IOC_NR(cmd)) {
2071 case SOUND_MIXER_RECSRC: /* Arg contains a bit for each recording source */
2072 if (get_user(val, user_arg))
2074 return set_rec_src(ms, val);
2078 if (i >= SOUND_MIXER_NRDEVICES)
2080 for (j = 0; j < ms->numch && ms->ch[j].osschannel != i; j++);
2083 if (get_user(val, user_arg))
2085 if (wrmixer(ms, j, val))
2087 return put_user(ms->ch[j].value, user_arg);
2091 static /*const*/ struct file_operations usb_mixer_fops = {
2092 .owner = THIS_MODULE,
2093 .llseek = no_llseek,
2094 .ioctl = usb_audio_ioctl_mixdev,
2095 .open = usb_audio_open_mixdev,
2096 .release = usb_audio_release_mixdev,
2099 /* --------------------------------------------------------------------- */
2101 static int drain_out(struct usb_audiodev *as, int nonblock)
2103 DECLARE_WAITQUEUE(wait, current);
2104 unsigned long flags;
2107 if (as->usbout.dma.mapped || !as->usbout.dma.ready)
2110 add_wait_queue(&as->usbout.dma.wait, &wait);
2112 __set_current_state(TASK_INTERRUPTIBLE);
2113 spin_lock_irqsave(&as->lock, flags);
2114 count = as->usbout.dma.count;
2115 spin_unlock_irqrestore(&as->lock, flags);
2118 if (signal_pending(current))
2121 remove_wait_queue(&as->usbout.dma.wait, &wait);
2122 set_current_state(TASK_RUNNING);
2125 tmo = 3 * HZ * count / as->usbout.dma.srate;
2126 tmo >>= AFMT_BYTESSHIFT(as->usbout.dma.format);
2127 if (!schedule_timeout(tmo + 1)) {
2128 printk(KERN_DEBUG "usbaudio: dma timed out??\n");
2132 remove_wait_queue(&as->usbout.dma.wait, &wait);
2133 set_current_state(TASK_RUNNING);
2134 if (signal_pending(current))
2135 return -ERESTARTSYS;
2139 /* --------------------------------------------------------------------- */
2141 static ssize_t usb_audio_read(struct file *file, char __user *buffer, size_t count, loff_t *ppos)
2143 struct usb_audiodev *as = (struct usb_audiodev *)file->private_data;
2144 DECLARE_WAITQUEUE(wait, current);
2146 unsigned long flags;
2150 if (as->usbin.dma.mapped)
2152 if (!as->usbin.dma.ready && (ret = prog_dmabuf_in(as)))
2154 if (!access_ok(VERIFY_WRITE, buffer, count))
2156 add_wait_queue(&as->usbin.dma.wait, &wait);
2158 spin_lock_irqsave(&as->lock, flags);
2159 ptr = as->usbin.dma.rdptr;
2160 cnt = as->usbin.dma.count;
2161 /* set task state early to avoid wakeup races */
2163 __set_current_state(TASK_INTERRUPTIBLE);
2164 spin_unlock_irqrestore(&as->lock, flags);
2168 if (usbin_start(as)) {
2173 if (file->f_flags & O_NONBLOCK) {
2179 if (signal_pending(current)) {
2186 if ((err = dmabuf_copyout_user(&as->usbin.dma, ptr, buffer, cnt))) {
2192 if (ptr >= as->usbin.dma.dmasize)
2193 ptr -= as->usbin.dma.dmasize;
2194 spin_lock_irqsave(&as->lock, flags);
2195 as->usbin.dma.rdptr = ptr;
2196 as->usbin.dma.count -= cnt;
2197 spin_unlock_irqrestore(&as->lock, flags);
2202 __set_current_state(TASK_RUNNING);
2203 remove_wait_queue(&as->usbin.dma.wait, &wait);
2207 static ssize_t usb_audio_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos)
2209 struct usb_audiodev *as = (struct usb_audiodev *)file->private_data;
2210 DECLARE_WAITQUEUE(wait, current);
2212 unsigned long flags;
2214 unsigned int start_thr;
2217 if (as->usbout.dma.mapped)
2219 if (!as->usbout.dma.ready && (ret = prog_dmabuf_out(as)))
2221 if (!access_ok(VERIFY_READ, buffer, count))
2223 start_thr = (as->usbout.dma.srate << AFMT_BYTESSHIFT(as->usbout.dma.format)) / (1000 / (3 * DESCFRAMES));
2224 add_wait_queue(&as->usbout.dma.wait, &wait);
2227 printk(KERN_DEBUG "usb_audio_write: count %u dma: count %u rdptr %u wrptr %u dmasize %u fragsize %u flags 0x%02x taskst 0x%lx\n",
2228 count, as->usbout.dma.count, as->usbout.dma.rdptr, as->usbout.dma.wrptr, as->usbout.dma.dmasize, as->usbout.dma.fragsize,
2229 as->usbout.flags, current->state);
2231 spin_lock_irqsave(&as->lock, flags);
2232 if (as->usbout.dma.count < 0) {
2233 as->usbout.dma.count = 0;
2234 as->usbout.dma.rdptr = as->usbout.dma.wrptr;
2236 ptr = as->usbout.dma.wrptr;
2237 cnt = as->usbout.dma.dmasize - as->usbout.dma.count;
2238 /* set task state early to avoid wakeup races */
2240 __set_current_state(TASK_INTERRUPTIBLE);
2241 spin_unlock_irqrestore(&as->lock, flags);
2245 if (usbout_start(as)) {
2250 if (file->f_flags & O_NONBLOCK) {
2256 if (signal_pending(current)) {
2263 if ((err = dmabuf_copyin_user(&as->usbout.dma, ptr, buffer, cnt))) {
2269 if (ptr >= as->usbout.dma.dmasize)
2270 ptr -= as->usbout.dma.dmasize;
2271 spin_lock_irqsave(&as->lock, flags);
2272 as->usbout.dma.wrptr = ptr;
2273 as->usbout.dma.count += cnt;
2274 spin_unlock_irqrestore(&as->lock, flags);
2278 if (as->usbout.dma.count >= start_thr && usbout_start(as)) {
2284 __set_current_state(TASK_RUNNING);
2285 remove_wait_queue(&as->usbout.dma.wait, &wait);
2289 /* Called without the kernel lock - fine */
2290 static unsigned int usb_audio_poll(struct file *file, struct poll_table_struct *wait)
2292 struct usb_audiodev *as = (struct usb_audiodev *)file->private_data;
2293 unsigned long flags;
2294 unsigned int mask = 0;
2296 if (file->f_mode & FMODE_WRITE) {
2297 if (!as->usbout.dma.ready)
2298 prog_dmabuf_out(as);
2299 poll_wait(file, &as->usbout.dma.wait, wait);
2301 if (file->f_mode & FMODE_READ) {
2302 if (!as->usbin.dma.ready)
2304 poll_wait(file, &as->usbin.dma.wait, wait);
2306 spin_lock_irqsave(&as->lock, flags);
2307 if (file->f_mode & FMODE_READ) {
2308 if (as->usbin.dma.count >= (signed)as->usbin.dma.fragsize)
2309 mask |= POLLIN | POLLRDNORM;
2311 if (file->f_mode & FMODE_WRITE) {
2312 if (as->usbout.dma.mapped) {
2313 if (as->usbout.dma.count >= (signed)as->usbout.dma.fragsize)
2314 mask |= POLLOUT | POLLWRNORM;
2316 if ((signed)as->usbout.dma.dmasize >= as->usbout.dma.count + (signed)as->usbout.dma.fragsize)
2317 mask |= POLLOUT | POLLWRNORM;
2320 spin_unlock_irqrestore(&as->lock, flags);
2324 static int usb_audio_mmap(struct file *file, struct vm_area_struct *vma)
2326 struct usb_audiodev *as = (struct usb_audiodev *)file->private_data;
2331 if (vma->vm_flags & VM_WRITE) {
2332 if ((ret = prog_dmabuf_out(as)) != 0)
2334 db = &as->usbout.dma;
2335 } else if (vma->vm_flags & VM_READ) {
2336 if ((ret = prog_dmabuf_in(as)) != 0)
2338 db = &as->usbin.dma;
2343 if (vma->vm_pgoff != 0)
2346 ret = dmabuf_mmap(vma, db, vma->vm_start, vma->vm_end - vma->vm_start, vma->vm_page_prot);
2352 static int usb_audio_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
2354 struct usb_audiodev *as = (struct usb_audiodev *)file->private_data;
2355 struct usb_audio_state *s = as->state;
2356 int __user *user_arg = (int __user *)arg;
2357 unsigned long flags;
2358 audio_buf_info abinfo;
2361 int val2, mapped, ret;
2365 mapped = ((file->f_mode & FMODE_WRITE) && as->usbout.dma.mapped) ||
2366 ((file->f_mode & FMODE_READ) && as->usbin.dma.mapped);
2369 get_user(val, (int *)arg);
2370 printk(KERN_DEBUG "usbaudio: usb_audio_ioctl cmd=%x arg=%lx *arg=%d\n", cmd, arg, val)
2373 case OSS_GETVERSION:
2374 return put_user(SOUND_VERSION, user_arg);
2376 case SNDCTL_DSP_SYNC:
2377 if (file->f_mode & FMODE_WRITE)
2378 return drain_out(as, 0/*file->f_flags & O_NONBLOCK*/);
2381 case SNDCTL_DSP_SETDUPLEX:
2384 case SNDCTL_DSP_GETCAPS:
2385 return put_user(DSP_CAP_DUPLEX | DSP_CAP_REALTIME | DSP_CAP_TRIGGER |
2386 DSP_CAP_MMAP | DSP_CAP_BATCH, user_arg);
2388 case SNDCTL_DSP_RESET:
2389 if (file->f_mode & FMODE_WRITE) {
2391 as->usbout.dma.rdptr = as->usbout.dma.wrptr = as->usbout.dma.count = as->usbout.dma.total_bytes = 0;
2393 if (file->f_mode & FMODE_READ) {
2395 as->usbin.dma.rdptr = as->usbin.dma.wrptr = as->usbin.dma.count = as->usbin.dma.total_bytes = 0;
2399 case SNDCTL_DSP_SPEED:
2400 if (get_user(val, user_arg))
2407 if (set_format(as, file->f_mode, AFMT_QUERY, val))
2410 return put_user((file->f_mode & FMODE_READ) ?
2411 as->usbin.dma.srate : as->usbout.dma.srate,
2414 case SNDCTL_DSP_STEREO:
2415 if (get_user(val, user_arg))
2417 val2 = (file->f_mode & FMODE_READ) ? as->usbin.dma.format : as->usbout.dma.format;
2419 val2 |= AFMT_STEREO;
2421 val2 &= ~AFMT_STEREO;
2422 if (set_format(as, file->f_mode, val2, 0))
2426 case SNDCTL_DSP_CHANNELS:
2427 if (get_user(val, user_arg))
2430 val2 = (file->f_mode & FMODE_READ) ? as->usbin.dma.format : as->usbout.dma.format;
2432 val2 &= ~AFMT_STEREO;
2434 val2 |= AFMT_STEREO;
2435 if (set_format(as, file->f_mode, val2, 0))
2438 val2 = (file->f_mode & FMODE_READ) ? as->usbin.dma.format : as->usbout.dma.format;
2439 return put_user(AFMT_ISSTEREO(val2) ? 2 : 1, user_arg);
2441 case SNDCTL_DSP_GETFMTS: /* Returns a mask */
2442 return put_user(AFMT_U8 | AFMT_U16_LE | AFMT_U16_BE |
2443 AFMT_S8 | AFMT_S16_LE | AFMT_S16_BE, user_arg);
2445 case SNDCTL_DSP_SETFMT: /* Selects ONE fmt*/
2446 if (get_user(val, user_arg))
2448 if (val != AFMT_QUERY) {
2449 if (hweight32(val) != 1)
2451 if (!(val & (AFMT_U8 | AFMT_U16_LE | AFMT_U16_BE |
2452 AFMT_S8 | AFMT_S16_LE | AFMT_S16_BE)))
2454 val2 = (file->f_mode & FMODE_READ) ? as->usbin.dma.format : as->usbout.dma.format;
2455 val |= val2 & AFMT_STEREO;
2456 if (set_format(as, file->f_mode, val, 0))
2459 val2 = (file->f_mode & FMODE_READ) ? as->usbin.dma.format : as->usbout.dma.format;
2460 return put_user(val2 & ~AFMT_STEREO, user_arg);
2462 case SNDCTL_DSP_POST:
2465 case SNDCTL_DSP_GETTRIGGER:
2467 if (file->f_mode & FMODE_READ && as->usbin.flags & FLG_RUNNING)
2468 val |= PCM_ENABLE_INPUT;
2469 if (file->f_mode & FMODE_WRITE && as->usbout.flags & FLG_RUNNING)
2470 val |= PCM_ENABLE_OUTPUT;
2471 return put_user(val, user_arg);
2473 case SNDCTL_DSP_SETTRIGGER:
2474 if (get_user(val, user_arg))
2476 if (file->f_mode & FMODE_READ) {
2477 if (val & PCM_ENABLE_INPUT) {
2478 if (!as->usbin.dma.ready && (ret = prog_dmabuf_in(as)))
2480 if (usbin_start(as))
2485 if (file->f_mode & FMODE_WRITE) {
2486 if (val & PCM_ENABLE_OUTPUT) {
2487 if (!as->usbout.dma.ready && (ret = prog_dmabuf_out(as)))
2489 if (usbout_start(as))
2496 case SNDCTL_DSP_GETOSPACE:
2497 if (!(file->f_mode & FMODE_WRITE))
2499 if (!(as->usbout.flags & FLG_RUNNING) && (val = prog_dmabuf_out(as)) != 0)
2501 spin_lock_irqsave(&as->lock, flags);
2502 abinfo.fragsize = as->usbout.dma.fragsize;
2503 abinfo.bytes = as->usbout.dma.dmasize - as->usbout.dma.count;
2504 abinfo.fragstotal = as->usbout.dma.numfrag;
2505 abinfo.fragments = abinfo.bytes >> as->usbout.dma.fragshift;
2506 spin_unlock_irqrestore(&as->lock, flags);
2507 return copy_to_user((void __user *)arg, &abinfo, sizeof(abinfo)) ? -EFAULT : 0;
2509 case SNDCTL_DSP_GETISPACE:
2510 if (!(file->f_mode & FMODE_READ))
2512 if (!(as->usbin.flags & FLG_RUNNING) && (val = prog_dmabuf_in(as)) != 0)
2514 spin_lock_irqsave(&as->lock, flags);
2515 abinfo.fragsize = as->usbin.dma.fragsize;
2516 abinfo.bytes = as->usbin.dma.count;
2517 abinfo.fragstotal = as->usbin.dma.numfrag;
2518 abinfo.fragments = abinfo.bytes >> as->usbin.dma.fragshift;
2519 spin_unlock_irqrestore(&as->lock, flags);
2520 return copy_to_user((void __user *)arg, &abinfo, sizeof(abinfo)) ? -EFAULT : 0;
2522 case SNDCTL_DSP_NONBLOCK:
2523 file->f_flags |= O_NONBLOCK;
2526 case SNDCTL_DSP_GETODELAY:
2527 if (!(file->f_mode & FMODE_WRITE))
2529 spin_lock_irqsave(&as->lock, flags);
2530 val = as->usbout.dma.count;
2531 spin_unlock_irqrestore(&as->lock, flags);
2532 return put_user(val, user_arg);
2534 case SNDCTL_DSP_GETIPTR:
2535 if (!(file->f_mode & FMODE_READ))
2537 spin_lock_irqsave(&as->lock, flags);
2538 cinfo.bytes = as->usbin.dma.total_bytes;
2539 cinfo.blocks = as->usbin.dma.count >> as->usbin.dma.fragshift;
2540 cinfo.ptr = as->usbin.dma.wrptr;
2541 if (as->usbin.dma.mapped)
2542 as->usbin.dma.count &= as->usbin.dma.fragsize-1;
2543 spin_unlock_irqrestore(&as->lock, flags);
2544 if (copy_to_user((void __user *)arg, &cinfo, sizeof(cinfo)))
2548 case SNDCTL_DSP_GETOPTR:
2549 if (!(file->f_mode & FMODE_WRITE))
2551 spin_lock_irqsave(&as->lock, flags);
2552 cinfo.bytes = as->usbout.dma.total_bytes;
2553 cinfo.blocks = as->usbout.dma.count >> as->usbout.dma.fragshift;
2554 cinfo.ptr = as->usbout.dma.rdptr;
2555 if (as->usbout.dma.mapped)
2556 as->usbout.dma.count &= as->usbout.dma.fragsize-1;
2557 spin_unlock_irqrestore(&as->lock, flags);
2558 if (copy_to_user((void __user *)arg, &cinfo, sizeof(cinfo)))
2562 case SNDCTL_DSP_GETBLKSIZE:
2563 if (file->f_mode & FMODE_WRITE) {
2564 if ((val = prog_dmabuf_out(as)))
2566 return put_user(as->usbout.dma.fragsize, user_arg);
2568 if ((val = prog_dmabuf_in(as)))
2570 return put_user(as->usbin.dma.fragsize, user_arg);
2572 case SNDCTL_DSP_SETFRAGMENT:
2573 if (get_user(val, user_arg))
2575 if (file->f_mode & FMODE_READ) {
2576 as->usbin.dma.ossfragshift = val & 0xffff;
2577 as->usbin.dma.ossmaxfrags = (val >> 16) & 0xffff;
2578 if (as->usbin.dma.ossfragshift < 4)
2579 as->usbin.dma.ossfragshift = 4;
2580 if (as->usbin.dma.ossfragshift > 15)
2581 as->usbin.dma.ossfragshift = 15;
2582 if (as->usbin.dma.ossmaxfrags < 4)
2583 as->usbin.dma.ossmaxfrags = 4;
2585 if (file->f_mode & FMODE_WRITE) {
2586 as->usbout.dma.ossfragshift = val & 0xffff;
2587 as->usbout.dma.ossmaxfrags = (val >> 16) & 0xffff;
2588 if (as->usbout.dma.ossfragshift < 4)
2589 as->usbout.dma.ossfragshift = 4;
2590 if (as->usbout.dma.ossfragshift > 15)
2591 as->usbout.dma.ossfragshift = 15;
2592 if (as->usbout.dma.ossmaxfrags < 4)
2593 as->usbout.dma.ossmaxfrags = 4;
2597 case SNDCTL_DSP_SUBDIVIDE:
2598 if ((file->f_mode & FMODE_READ && as->usbin.dma.subdivision) ||
2599 (file->f_mode & FMODE_WRITE && as->usbout.dma.subdivision))
2601 if (get_user(val, user_arg))
2603 if (val != 1 && val != 2 && val != 4)
2605 if (file->f_mode & FMODE_READ)
2606 as->usbin.dma.subdivision = val;
2607 if (file->f_mode & FMODE_WRITE)
2608 as->usbout.dma.subdivision = val;
2611 case SOUND_PCM_READ_RATE:
2612 return put_user((file->f_mode & FMODE_READ) ?
2613 as->usbin.dma.srate : as->usbout.dma.srate,
2616 case SOUND_PCM_READ_CHANNELS:
2617 val2 = (file->f_mode & FMODE_READ) ? as->usbin.dma.format : as->usbout.dma.format;
2618 return put_user(AFMT_ISSTEREO(val2) ? 2 : 1, user_arg);
2620 case SOUND_PCM_READ_BITS:
2621 val2 = (file->f_mode & FMODE_READ) ? as->usbin.dma.format : as->usbout.dma.format;
2622 return put_user(AFMT_IS16BIT(val2) ? 16 : 8, user_arg);
2624 case SOUND_PCM_WRITE_FILTER:
2625 case SNDCTL_DSP_SETSYNCRO:
2626 case SOUND_PCM_READ_FILTER:
2629 dprintk((KERN_DEBUG "usbaudio: usb_audio_ioctl - no command found\n"));
2630 return -ENOIOCTLCMD;
2633 static int usb_audio_open(struct inode *inode, struct file *file)
2635 unsigned int minor = iminor(inode);
2636 DECLARE_WAITQUEUE(wait, current);
2637 struct list_head *devs, *adevs;
2638 struct usb_audiodev *as;
2639 struct usb_audio_state *s;
2643 for (devs = audiodevs.next; devs != &audiodevs; devs = devs->next) {
2644 s = list_entry(devs, struct usb_audio_state, audiodev);
2645 for (adevs = s->audiolist.next; adevs != &s->audiolist; adevs = adevs->next) {
2646 as = list_entry(adevs, struct usb_audiodev, list);
2647 if (!((as->dev_audio ^ minor) & ~0xf))
2659 /* wait for device to become free */
2660 if (!(as->open_mode & file->f_mode))
2662 if (file->f_flags & O_NONBLOCK) {
2666 __set_current_state(TASK_INTERRUPTIBLE);
2667 add_wait_queue(&open_wait, &wait);
2670 __set_current_state(TASK_RUNNING);
2671 remove_wait_queue(&open_wait, &wait);
2672 if (signal_pending(current))
2673 return -ERESTARTSYS;
2675 if (file->f_mode & FMODE_READ)
2676 as->usbin.dma.ossfragshift = as->usbin.dma.ossmaxfrags = as->usbin.dma.subdivision = 0;
2677 if (file->f_mode & FMODE_WRITE)
2678 as->usbout.dma.ossfragshift = as->usbout.dma.ossmaxfrags = as->usbout.dma.subdivision = 0;
2679 if (set_format(as, file->f_mode, ((minor & 0xf) == SND_DEV_DSP16) ? AFMT_S16_LE : AFMT_U8 /* AFMT_ULAW */, 8000)) {
2683 file->private_data = as;
2684 as->open_mode |= file->f_mode & (FMODE_READ | FMODE_WRITE);
2687 return nonseekable_open(inode, file);
2690 static int usb_audio_release(struct inode *inode, struct file *file)
2692 struct usb_audiodev *as = (struct usb_audiodev *)file->private_data;
2693 struct usb_audio_state *s;
2694 struct usb_device *dev;
2699 if (file->f_mode & FMODE_WRITE)
2700 drain_out(as, file->f_flags & O_NONBLOCK);
2702 if (file->f_mode & FMODE_WRITE) {
2704 if (dev && as->usbout.interface >= 0)
2705 usb_set_interface(dev, as->usbout.interface, 0);
2706 dmabuf_release(&as->usbout.dma);
2709 if (file->f_mode & FMODE_READ) {
2711 if (dev && as->usbin.interface >= 0)
2712 usb_set_interface(dev, as->usbin.interface, 0);
2713 dmabuf_release(&as->usbin.dma);
2716 as->open_mode &= (~file->f_mode) & (FMODE_READ|FMODE_WRITE);
2718 wake_up(&open_wait);
2723 static /*const*/ struct file_operations usb_audio_fops = {
2724 .owner = THIS_MODULE,
2725 .llseek = no_llseek,
2726 .read = usb_audio_read,
2727 .write = usb_audio_write,
2728 .poll = usb_audio_poll,
2729 .ioctl = usb_audio_ioctl,
2730 .mmap = usb_audio_mmap,
2731 .open = usb_audio_open,
2732 .release = usb_audio_release,
2735 /* --------------------------------------------------------------------- */
2737 static int usb_audio_probe(struct usb_interface *iface,
2738 const struct usb_device_id *id);
2739 static void usb_audio_disconnect(struct usb_interface *iface);
2741 static struct usb_device_id usb_audio_ids [] = {
2742 { .match_flags = (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS),
2743 .bInterfaceClass = USB_CLASS_AUDIO, .bInterfaceSubClass = 1},
2744 { } /* Terminating entry */
2747 MODULE_DEVICE_TABLE (usb, usb_audio_ids);
2749 static struct usb_driver usb_audio_driver = {
2750 .owner = THIS_MODULE,
2752 .probe = usb_audio_probe,
2753 .disconnect = usb_audio_disconnect,
2754 .id_table = usb_audio_ids,
2757 static void *find_descriptor(void *descstart, unsigned int desclen, void *after,
2758 u8 dtype, int iface, int altsetting)
2761 int ifc = -1, as = -1;
2771 if (p[1] == USB_DT_INTERFACE) {
2772 /* minimum length of interface descriptor */
2778 if (p[1] == dtype && (!after || (void *)p > after) &&
2779 (iface == -1 || iface == ifc) && (altsetting == -1 || altsetting == as)) {
2787 static void *find_csinterface_descriptor(void *descstart, unsigned int desclen, void *after, u8 dsubtype, int iface, int altsetting)
2791 p = find_descriptor(descstart, desclen, after, USB_DT_CS_INTERFACE, iface, altsetting);
2793 if (p[0] >= 3 && p[2] == dsubtype)
2795 p = find_descriptor(descstart, desclen, p, USB_DT_CS_INTERFACE, iface, altsetting);
2800 static void *find_audiocontrol_unit(void *descstart, unsigned int desclen, void *after, u8 unit, int iface)
2804 p = find_descriptor(descstart, desclen, after, USB_DT_CS_INTERFACE, iface, -1);
2806 if (p[0] >= 4 && p[2] >= INPUT_TERMINAL && p[2] <= EXTENSION_UNIT && p[3] == unit)
2808 p = find_descriptor(descstart, desclen, p, USB_DT_CS_INTERFACE, iface, -1);
2813 static void usb_audio_parsestreaming(struct usb_audio_state *s, unsigned char *buffer, unsigned int buflen, int asifin, int asifout)
2815 struct usb_device *dev = s->usbdev;
2816 struct usb_audiodev *as;
2817 struct usb_host_interface *alts;
2818 struct usb_interface *iface;
2819 struct audioformat *fp;
2820 unsigned char *fmt, *csep;
2821 unsigned int i, j, k, format, idx;
2823 if (!(as = kmalloc(sizeof(struct usb_audiodev), GFP_KERNEL)))
2825 memset(as, 0, sizeof(struct usb_audiodev));
2826 init_waitqueue_head(&as->usbin.dma.wait);
2827 init_waitqueue_head(&as->usbout.dma.wait);
2828 spin_lock_init(&as->lock);
2829 as->usbin.durb[0].urb = usb_alloc_urb (DESCFRAMES, GFP_KERNEL);
2830 as->usbin.durb[1].urb = usb_alloc_urb (DESCFRAMES, GFP_KERNEL);
2831 as->usbin.surb[0].urb = usb_alloc_urb (SYNCFRAMES, GFP_KERNEL);
2832 as->usbin.surb[1].urb = usb_alloc_urb (SYNCFRAMES, GFP_KERNEL);
2833 as->usbout.durb[0].urb = usb_alloc_urb (DESCFRAMES, GFP_KERNEL);
2834 as->usbout.durb[1].urb = usb_alloc_urb (DESCFRAMES, GFP_KERNEL);
2835 as->usbout.surb[0].urb = usb_alloc_urb (SYNCFRAMES, GFP_KERNEL);
2836 as->usbout.surb[1].urb = usb_alloc_urb (SYNCFRAMES, GFP_KERNEL);
2837 if ((!as->usbin.durb[0].urb) ||
2838 (!as->usbin.durb[1].urb) ||
2839 (!as->usbin.surb[0].urb) ||
2840 (!as->usbin.surb[1].urb) ||
2841 (!as->usbout.durb[0].urb) ||
2842 (!as->usbout.durb[1].urb) ||
2843 (!as->usbout.surb[0].urb) ||
2844 (!as->usbout.surb[1].urb)) {
2845 usb_free_urb(as->usbin.durb[0].urb);
2846 usb_free_urb(as->usbin.durb[1].urb);
2847 usb_free_urb(as->usbin.surb[0].urb);
2848 usb_free_urb(as->usbin.surb[1].urb);
2849 usb_free_urb(as->usbout.durb[0].urb);
2850 usb_free_urb(as->usbout.durb[1].urb);
2851 usb_free_urb(as->usbout.surb[0].urb);
2852 usb_free_urb(as->usbout.surb[1].urb);
2857 as->usbin.interface = asifin;
2858 as->usbout.interface = asifout;
2859 /* search for input formats */
2861 as->usbin.flags = FLG_CONNECTED;
2862 iface = usb_ifnum_to_if(dev, asifin);
2863 for (idx = 0; idx < iface->num_altsetting; idx++) {
2864 alts = &iface->altsetting[idx];
2865 i = alts->desc.bAlternateSetting;
2866 if (alts->desc.bInterfaceClass != USB_CLASS_AUDIO || alts->desc.bInterfaceSubClass != 2)
2868 if (alts->desc.bNumEndpoints < 1) {
2869 if (i != 0) { /* altsetting 0 has no endpoints (Section B.3.4.1) */
2870 printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u does not have an endpoint\n",
2871 dev->devnum, asifin, i);
2875 if ((alts->endpoint[0].desc.bmAttributes & 0x03) != 0x01 ||
2876 !(alts->endpoint[0].desc.bEndpointAddress & 0x80)) {
2877 printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u first endpoint not isochronous in\n",
2878 dev->devnum, asifin, i);
2881 fmt = find_csinterface_descriptor(buffer, buflen, NULL, AS_GENERAL, asifin, i);
2883 printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u FORMAT_TYPE descriptor not found\n",
2884 dev->devnum, asifin, i);
2887 if (fmt[0] < 7 || fmt[6] != 0 || (fmt[5] != 1 && fmt[5] != 2)) {
2888 printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u format not supported\n",
2889 dev->devnum, asifin, i);
2892 format = (fmt[5] == 2) ? (AFMT_U16_LE | AFMT_U8) : (AFMT_S16_LE | AFMT_S8);
2893 fmt = find_csinterface_descriptor(buffer, buflen, NULL, FORMAT_TYPE, asifin, i);
2895 printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u FORMAT_TYPE descriptor not found\n",
2896 dev->devnum, asifin, i);
2899 if (fmt[0] < 8+3*(fmt[7] ? fmt[7] : 2) || fmt[3] != 1) {
2900 printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u FORMAT_TYPE descriptor not supported\n",
2901 dev->devnum, asifin, i);
2904 if (fmt[4] < 1 || fmt[4] > 2 || fmt[5] < 1 || fmt[5] > 2) {
2905 printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u unsupported channels %u framesize %u\n",
2906 dev->devnum, asifin, i, fmt[4], fmt[5]);
2909 csep = find_descriptor(buffer, buflen, NULL, USB_DT_CS_ENDPOINT, asifin, i);
2910 if (!csep || csep[0] < 7 || csep[2] != EP_GENERAL) {
2911 printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u no or invalid class specific endpoint descriptor\n",
2912 dev->devnum, asifin, i);
2915 if (as->numfmtin >= MAXFORMATS)
2917 fp = &as->fmtin[as->numfmtin++];
2919 format &= (AFMT_U16_LE | AFMT_S16_LE);
2921 format &= (AFMT_U8 | AFMT_S8);
2923 format |= AFMT_STEREO;
2924 fp->format = format;
2926 fp->sratelo = fp->sratehi = fmt[8] | (fmt[9] << 8) | (fmt[10] << 16);
2927 printk(KERN_INFO "usbaudio: valid input sample rate %u\n", fp->sratelo);
2928 for (j = fmt[7] ? (fmt[7]-1) : 1; j > 0; j--) {
2929 k = fmt[8+3*j] | (fmt[9+3*j] << 8) | (fmt[10+3*j] << 16);
2930 printk(KERN_INFO "usbaudio: valid input sample rate %u\n", k);
2931 if (k > fp->sratehi)
2933 if (k < fp->sratelo)
2936 fp->attributes = csep[3];
2937 printk(KERN_INFO "usbaudio: device %u interface %u altsetting %u: format 0x%08x sratelo %u sratehi %u attributes 0x%02x\n",
2938 dev->devnum, asifin, i, fp->format, fp->sratelo, fp->sratehi, fp->attributes);
2941 /* search for output formats */
2943 as->usbout.flags = FLG_CONNECTED;
2944 iface = usb_ifnum_to_if(dev, asifout);
2945 for (idx = 0; idx < iface->num_altsetting; idx++) {
2946 alts = &iface->altsetting[idx];
2947 i = alts->desc.bAlternateSetting;
2948 if (alts->desc.bInterfaceClass != USB_CLASS_AUDIO || alts->desc.bInterfaceSubClass != 2)
2950 if (alts->desc.bNumEndpoints < 1) {
2951 /* altsetting 0 should never have iso EPs */
2953 printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u does not have an endpoint\n",
2954 dev->devnum, asifout, i);
2957 if ((alts->endpoint[0].desc.bmAttributes & 0x03) != 0x01 ||
2958 (alts->endpoint[0].desc.bEndpointAddress & 0x80)) {
2959 printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u first endpoint not isochronous out\n",
2960 dev->devnum, asifout, i);
2963 /* See USB audio formats manual, section 2 */
2964 fmt = find_csinterface_descriptor(buffer, buflen, NULL, AS_GENERAL, asifout, i);
2966 printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u FORMAT_TYPE descriptor not found\n",
2967 dev->devnum, asifout, i);
2970 if (fmt[0] < 7 || fmt[6] != 0 || (fmt[5] != 1 && fmt[5] != 2)) {
2971 printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u format not supported\n",
2972 dev->devnum, asifout, i);
2975 format = (fmt[5] == 2) ? (AFMT_U16_LE | AFMT_U8) : (AFMT_S16_LE | AFMT_S8);
2976 /* Dallas DS4201 workaround */
2977 if (dev->descriptor.idVendor == 0x04fa && dev->descriptor.idProduct == 0x4201)
2978 format = (AFMT_S16_LE | AFMT_S8);
2979 fmt = find_csinterface_descriptor(buffer, buflen, NULL, FORMAT_TYPE, asifout, i);
2981 printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u FORMAT_TYPE descriptor not found\n",
2982 dev->devnum, asifout, i);
2985 if (fmt[0] < 8+3*(fmt[7] ? fmt[7] : 2) || fmt[3] != 1) {
2986 printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u FORMAT_TYPE descriptor not supported\n",
2987 dev->devnum, asifout, i);
2990 if (fmt[4] < 1 || fmt[4] > 2 || fmt[5] < 1 || fmt[5] > 2) {
2991 printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u unsupported channels %u framesize %u\n",
2992 dev->devnum, asifout, i, fmt[4], fmt[5]);
2995 csep = find_descriptor(buffer, buflen, NULL, USB_DT_CS_ENDPOINT, asifout, i);
2996 if (!csep || csep[0] < 7 || csep[2] != EP_GENERAL) {
2997 printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u no or invalid class specific endpoint descriptor\n",
2998 dev->devnum, asifout, i);
3001 if (as->numfmtout >= MAXFORMATS)
3003 fp = &as->fmtout[as->numfmtout++];
3005 format &= (AFMT_U16_LE | AFMT_S16_LE);
3007 format &= (AFMT_U8 | AFMT_S8);
3009 format |= AFMT_STEREO;
3010 fp->format = format;
3012 fp->sratelo = fp->sratehi = fmt[8] | (fmt[9] << 8) | (fmt[10] << 16);
3013 printk(KERN_INFO "usbaudio: valid output sample rate %u\n", fp->sratelo);
3014 for (j = fmt[7] ? (fmt[7]-1) : 1; j > 0; j--) {
3015 k = fmt[8+3*j] | (fmt[9+3*j] << 8) | (fmt[10+3*j] << 16);
3016 printk(KERN_INFO "usbaudio: valid output sample rate %u\n", k);
3017 if (k > fp->sratehi)
3019 if (k < fp->sratelo)
3022 fp->attributes = csep[3];
3023 printk(KERN_INFO "usbaudio: device %u interface %u altsetting %u: format 0x%08x sratelo %u sratehi %u attributes 0x%02x\n",
3024 dev->devnum, asifout, i, fp->format, fp->sratelo, fp->sratehi, fp->attributes);
3027 if (as->numfmtin == 0 && as->numfmtout == 0) {
3028 usb_free_urb(as->usbin.durb[0].urb);
3029 usb_free_urb(as->usbin.durb[1].urb);
3030 usb_free_urb(as->usbin.surb[0].urb);
3031 usb_free_urb(as->usbin.surb[1].urb);
3032 usb_free_urb(as->usbout.durb[0].urb);
3033 usb_free_urb(as->usbout.durb[1].urb);
3034 usb_free_urb(as->usbout.surb[0].urb);
3035 usb_free_urb(as->usbout.surb[1].urb);
3039 if ((as->dev_audio = register_sound_dsp(&usb_audio_fops, -1)) < 0) {
3040 printk(KERN_ERR "usbaudio: cannot register dsp\n");
3041 usb_free_urb(as->usbin.durb[0].urb);
3042 usb_free_urb(as->usbin.durb[1].urb);
3043 usb_free_urb(as->usbin.surb[0].urb);
3044 usb_free_urb(as->usbin.surb[1].urb);
3045 usb_free_urb(as->usbout.durb[0].urb);
3046 usb_free_urb(as->usbout.durb[1].urb);
3047 usb_free_urb(as->usbout.surb[0].urb);
3048 usb_free_urb(as->usbout.surb[1].urb);
3052 printk(KERN_INFO "usbaudio: registered dsp 14,%d\n", as->dev_audio);
3053 /* everything successful */
3054 list_add_tail(&as->list, &s->audiolist);
3057 struct consmixstate {
3058 struct usb_audio_state *s;
3059 unsigned char *buffer;
3060 unsigned int buflen;
3061 unsigned int ctrlif;
3062 struct mixerchannel mixch[SOUND_MIXER_NRDEVICES];
3063 unsigned int nrmixch;
3064 unsigned int mixchmask;
3065 unsigned long unitbitmap[32/sizeof(unsigned long)];
3067 unsigned int nrchannels;
3068 unsigned int termtype;
3069 unsigned int chconfig;
3072 static struct mixerchannel *getmixchannel(struct consmixstate *state, unsigned int nr)
3074 struct mixerchannel *c;
3076 if (nr >= SOUND_MIXER_NRDEVICES) {
3077 printk(KERN_ERR "usbaudio: invalid OSS mixer channel %u\n", nr);
3080 if (!(state->mixchmask & (1 << nr))) {
3081 printk(KERN_WARNING "usbaudio: OSS mixer channel %u already in use\n", nr);
3084 c = &state->mixch[state->nrmixch++];
3086 state->mixchmask &= ~(1 << nr);
3090 static unsigned int getvolchannel(struct consmixstate *state)
3094 if ((state->termtype & 0xff00) == 0x0000 && (state->mixchmask & SOUND_MASK_VOLUME))
3095 return SOUND_MIXER_VOLUME;
3096 if ((state->termtype & 0xff00) == 0x0100) {
3097 if (state->mixchmask & SOUND_MASK_PCM)
3098 return SOUND_MIXER_PCM;
3099 if (state->mixchmask & SOUND_MASK_ALTPCM)
3100 return SOUND_MIXER_ALTPCM;
3102 if ((state->termtype & 0xff00) == 0x0200 && (state->mixchmask & SOUND_MASK_MIC))
3103 return SOUND_MIXER_MIC;
3104 if ((state->termtype & 0xff00) == 0x0300 && (state->mixchmask & SOUND_MASK_SPEAKER))
3105 return SOUND_MIXER_SPEAKER;
3106 if ((state->termtype & 0xff00) == 0x0500) {
3107 if (state->mixchmask & SOUND_MASK_PHONEIN)
3108 return SOUND_MIXER_PHONEIN;
3109 if (state->mixchmask & SOUND_MASK_PHONEOUT)
3110 return SOUND_MIXER_PHONEOUT;
3112 if (state->termtype >= 0x710 && state->termtype <= 0x711 && (state->mixchmask & SOUND_MASK_RADIO))
3113 return SOUND_MIXER_RADIO;
3114 if (state->termtype >= 0x709 && state->termtype <= 0x70f && (state->mixchmask & SOUND_MASK_VIDEO))
3115 return SOUND_MIXER_VIDEO;
3116 u = ffs(state->mixchmask & (SOUND_MASK_LINE | SOUND_MASK_CD | SOUND_MASK_LINE1 | SOUND_MASK_LINE2 | SOUND_MASK_LINE3 |
3117 SOUND_MASK_DIGITAL1 | SOUND_MASK_DIGITAL2 | SOUND_MASK_DIGITAL3));
3121 static void prepmixch(struct consmixstate *state)
3123 struct usb_device *dev = state->s->usbdev;
3124 struct mixerchannel *ch;
3125 unsigned char buf[2];
3127 unsigned int v2, v3;
3129 if (!state->nrmixch || state->nrmixch > SOUND_MIXER_NRDEVICES)
3131 ch = &state->mixch[state->nrmixch-1];
3132 switch (ch->selector) {
3133 case 0: /* mixer unit request */
3134 if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_MIN, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
3135 (ch->chnum << 8) | 1, state->ctrlif | (ch->unitid << 8), buf, 2, HZ) < 0)
3137 ch->minval = buf[0] | (buf[1] << 8);
3138 if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_MAX, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
3139 (ch->chnum << 8) | 1, state->ctrlif | (ch->unitid << 8), buf, 2, HZ) < 0)
3141 ch->maxval = buf[0] | (buf[1] << 8);
3142 v2 = ch->maxval - ch->minval;
3145 if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
3146 (ch->chnum << 8) | 1, state->ctrlif | (ch->unitid << 8), buf, 2, HZ) < 0)
3148 v1 = buf[0] | (buf[1] << 8);
3149 v3 = v1 - ch->minval;
3154 if (ch->flags & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT)) {
3155 if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
3156 ((ch->chnum + !!(ch->flags & MIXFLG_STEREOIN)) << 8) | (1 + !!(ch->flags & MIXFLG_STEREOOUT)),
3157 state->ctrlif | (ch->unitid << 8), buf, 2, HZ) < 0)
3159 v1 = buf[0] | (buf[1] << 8);
3160 v3 = v1 - ch->minval;
3165 ch->value |= v3 << 8;
3168 /* various feature unit controls */
3169 case VOLUME_CONTROL:
3170 if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_MIN, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
3171 (ch->selector << 8) | ch->chnum, state->ctrlif | (ch->unitid << 8), buf, 2, HZ) < 0)
3173 ch->minval = buf[0] | (buf[1] << 8);
3174 if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_MAX, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
3175 (ch->selector << 8) | ch->chnum, state->ctrlif | (ch->unitid << 8), buf, 2, HZ) < 0)
3177 ch->maxval = buf[0] | (buf[1] << 8);
3178 if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
3179 (ch->selector << 8) | ch->chnum, state->ctrlif | (ch->unitid << 8), buf, 2, HZ) < 0)
3181 v1 = buf[0] | (buf[1] << 8);
3182 v2 = ch->maxval - ch->minval;
3183 v3 = v1 - ch->minval;
3190 if (ch->flags & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT)) {
3191 if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
3192 (ch->selector << 8) | (ch->chnum + 1), state->ctrlif | (ch->unitid << 8), buf, 2, HZ) < 0)
3194 v1 = buf[0] | (buf[1] << 8);
3195 v3 = v1 - ch->minval;
3200 ch->value |= v3 << 8;
3205 case TREBLE_CONTROL:
3206 if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_MIN, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
3207 (ch->selector << 8) | ch->chnum, state->ctrlif | (ch->unitid << 8), buf, 1, HZ) < 0)
3209 ch->minval = buf[0] << 8;
3210 if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_MAX, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
3211 (ch->selector << 8) | ch->chnum, state->ctrlif | (ch->unitid << 8), buf, 1, HZ) < 0)
3213 ch->maxval = buf[0] << 8;
3214 if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
3215 (ch->selector << 8) | ch->chnum, state->ctrlif | (ch->unitid << 8), buf, 1, HZ) < 0)
3218 v2 = ch->maxval - ch->minval;
3219 v3 = v1 - ch->minval;
3226 if (ch->flags & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT)) {
3227 if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
3228 (ch->selector << 8) | (ch->chnum + 1), state->ctrlif | (ch->unitid << 8), buf, 1, HZ) < 0)
3231 v3 = v1 - ch->minval;
3236 ch->value |= v3 << 8;
3245 printk(KERN_ERR "usbaudio: mixer request device %u if %u unit %u ch %u selector %u failed\n",
3246 dev->devnum, state->ctrlif, ch->unitid, ch->chnum, ch->selector);
3252 static void usb_audio_recurseunit(struct consmixstate *state, unsigned char unitid);
3254 static inline int checkmixbmap(unsigned char *bmap, unsigned char flg, unsigned int inidx, unsigned int numoch)
3259 if (!(bmap[-(idx >> 3)] & (0x80 >> (idx & 7))))
3261 if (!(flg & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT)))
3263 idx = (inidx+!!(flg & MIXFLG_STEREOIN))*numoch+!!(flg & MIXFLG_STEREOOUT);
3264 if (!(bmap[-(idx >> 3)] & (0x80 >> (idx & 7))))
3269 static void usb_audio_mixerunit(struct consmixstate *state, unsigned char *mixer)
3271 unsigned int nroutch = mixer[5+mixer[4]];
3272 unsigned int chidx[SOUND_MIXER_NRDEVICES+1];
3273 unsigned int termt[SOUND_MIXER_NRDEVICES];
3274 unsigned char flg = (nroutch >= 2) ? MIXFLG_STEREOOUT : 0;
3275 unsigned char *bmap = &mixer[9+mixer[4]];
3276 unsigned int bmapsize;
3277 struct mixerchannel *ch;
3281 printk(KERN_ERR "usbaudio: unit %u invalid MIXER_UNIT descriptor\n", mixer[3]);
3284 if (mixer[4] > SOUND_MIXER_NRDEVICES) {
3285 printk(KERN_ERR "usbaudio: mixer unit %u: too many input pins\n", mixer[3]);
3289 for (i = 0; i < mixer[4]; i++) {
3290 usb_audio_recurseunit(state, mixer[5+i]);
3291 chidx[i+1] = chidx[i] + state->nrchannels;
3292 termt[i] = state->termtype;
3294 state->termtype = 0;
3295 state->chconfig = mixer[6+mixer[4]] | (mixer[7+mixer[4]] << 8);
3296 bmapsize = (nroutch * chidx[mixer[4]] + 7) >> 3;
3297 bmap += bmapsize - 1;
3298 if (mixer[0] < 10+mixer[4]+bmapsize) {
3299 printk(KERN_ERR "usbaudio: unit %u invalid MIXER_UNIT descriptor (bitmap too small)\n", mixer[3]);
3302 for (i = 0; i < mixer[4]; i++) {
3303 state->termtype = termt[i];
3304 if (chidx[i+1]-chidx[i] >= 2) {
3305 flg |= MIXFLG_STEREOIN;
3306 if (checkmixbmap(bmap, flg, chidx[i], nroutch)) {
3307 ch = getmixchannel(state, getvolchannel(state));
3309 ch->unitid = mixer[3];
3311 ch->chnum = chidx[i]+1;
3318 flg &= ~MIXFLG_STEREOIN;
3319 if (checkmixbmap(bmap, flg, chidx[i], nroutch)) {
3320 ch = getmixchannel(state, getvolchannel(state));
3322 ch->unitid = mixer[3];
3324 ch->chnum = chidx[i]+1;
3330 state->termtype = 0;
3333 static struct mixerchannel *slctsrc_findunit(struct consmixstate *state, __u8 unitid)
3337 for (i = 0; i < state->nrmixch; i++)
3338 if (state->mixch[i].unitid == unitid)
3339 return &state->mixch[i];
3343 static void usb_audio_selectorunit(struct consmixstate *state, unsigned char *selector)
3345 unsigned int chnum, i, mixch;
3346 struct mixerchannel *mch;
3349 printk(KERN_ERR "usbaudio: unit %u invalid SELECTOR_UNIT descriptor\n", selector[3]);
3352 mixch = state->nrmixch;
3353 usb_audio_recurseunit(state, selector[5]);
3354 if (state->nrmixch != mixch) {
3355 mch = &state->mixch[state->nrmixch-1];
3356 mch->slctunitid = selector[3] | (1 << 8);
3357 } else if ((mch = slctsrc_findunit(state, selector[5]))) {
3358 mch->slctunitid = selector[3] | (1 << 8);
3360 printk(KERN_INFO "usbaudio: selector unit %u: ignoring channel 1\n", selector[3]);
3362 chnum = state->nrchannels;
3363 for (i = 1; i < selector[4]; i++) {
3364 mixch = state->nrmixch;
3365 usb_audio_recurseunit(state, selector[5+i]);
3366 if (chnum != state->nrchannels) {
3367 printk(KERN_ERR "usbaudio: selector unit %u: input pins with varying channel numbers\n", selector[3]);
3368 state->termtype = 0;
3369 state->chconfig = 0;
3370 state->nrchannels = 0;
3373 if (state->nrmixch != mixch) {
3374 mch = &state->mixch[state->nrmixch-1];
3375 mch->slctunitid = selector[3] | ((i + 1) << 8);
3376 } else if ((mch = slctsrc_findunit(state, selector[5+i]))) {
3377 mch->slctunitid = selector[3] | ((i + 1) << 8);
3379 printk(KERN_INFO "usbaudio: selector unit %u: ignoring channel %u\n", selector[3], i+1);
3382 state->termtype = 0;
3383 state->chconfig = 0;
3386 /* in the future we might try to handle 3D etc. effect units */
3388 static void usb_audio_processingunit(struct consmixstate *state, unsigned char *proc)
3392 for (i = 0; i < proc[6]; i++)
3393 usb_audio_recurseunit(state, proc[7+i]);
3394 state->nrchannels = proc[7+proc[6]];
3395 state->termtype = 0;
3396 state->chconfig = proc[8+proc[6]] | (proc[9+proc[6]] << 8);
3400 /* See Audio Class Spec, section 4.3.2.5 */
3401 static void usb_audio_featureunit(struct consmixstate *state, unsigned char *ftr)
3403 struct mixerchannel *ch;
3404 unsigned short chftr, mchftr;
3406 struct usb_device *dev = state->s->usbdev;
3407 unsigned char data[1];
3409 unsigned char nr_logical_channels, i;
3411 usb_audio_recurseunit(state, ftr[4]);
3414 printk(KERN_ERR "usbaudio: wrong controls size in feature unit %u\n",ftr[3]);
3418 if (state->nrchannels == 0) {
3419 printk(KERN_ERR "usbaudio: feature unit %u source has no channels\n", ftr[3]);
3422 if (state->nrchannels > 2)
3423 printk(KERN_WARNING "usbaudio: feature unit %u: OSS mixer interface does not support more than 2 channels\n", ftr[3]);
3425 nr_logical_channels=(ftr[0]-7)/ftr[5]-1;
3427 if (nr_logical_channels != state->nrchannels) {
3428 printk(KERN_WARNING "usbaudio: warning: found %d of %d logical channels.\n", state->nrchannels,nr_logical_channels);
3430 if (state->nrchannels == 1 && nr_logical_channels==0) {
3431 printk(KERN_INFO "usbaudio: assuming the channel found is the master channel (got a Philips camera?). Should be fine.\n");
3432 } else if (state->nrchannels == 1 && nr_logical_channels==2) {
3433 printk(KERN_INFO "usbaudio: assuming that a stereo channel connected directly to a mixer is missing in search (got Labtec headset?). Should be fine.\n");
3434 state->nrchannels=nr_logical_channels;
3436 printk(KERN_WARNING "usbaudio: no idea what's going on..., contact linux-usb-devel@lists.sourceforge.net\n");
3440 /* There is always a master channel */
3442 /* Binary AND over logical channels if they exist */
3443 if (nr_logical_channels) {
3444 chftr = ftr[6+ftr[5]];
3445 for (i = 2; i <= nr_logical_channels; i++)
3446 chftr &= ftr[6+i*ftr[5]];
3451 /* volume control */
3453 ch = getmixchannel(state, getvolchannel(state));
3455 ch->unitid = ftr[3];
3456 ch->selector = VOLUME_CONTROL;
3458 ch->flags = (state->nrchannels > 1) ? (MIXFLG_STEREOIN | MIXFLG_STEREOOUT) : 0;
3461 } else if (mchftr & 2) {
3462 ch = getmixchannel(state, getvolchannel(state));
3464 ch->unitid = ftr[3];
3465 ch->selector = VOLUME_CONTROL;
3473 ch = getmixchannel(state, SOUND_MIXER_BASS);
3475 ch->unitid = ftr[3];
3476 ch->selector = BASS_CONTROL;
3478 ch->flags = (state->nrchannels > 1) ? (MIXFLG_STEREOIN | MIXFLG_STEREOOUT) : 0;
3481 } else if (mchftr & 4) {
3482 ch = getmixchannel(state, SOUND_MIXER_BASS);
3484 ch->unitid = ftr[3];
3485 ch->selector = BASS_CONTROL;
3491 /* treble control */
3493 ch = getmixchannel(state, SOUND_MIXER_TREBLE);
3495 ch->unitid = ftr[3];
3496 ch->selector = TREBLE_CONTROL;
3498 ch->flags = (state->nrchannels > 1) ? (MIXFLG_STEREOIN | MIXFLG_STEREOOUT) : 0;
3501 } else if (mchftr & 16) {
3502 ch = getmixchannel(state, SOUND_MIXER_TREBLE);
3504 ch->unitid = ftr[3];
3505 ch->selector = TREBLE_CONTROL;
3512 /* if there are mute controls, unmute them */
3513 /* does not seem to be necessary, and the Dallas chip does not seem to support the "all" channel (255) */
3514 if ((chftr & 1) || (mchftr & 1)) {
3515 printk(KERN_DEBUG "usbaudio: unmuting feature unit %u interface %u\n", ftr[3], state->ctrlif);
3517 if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
3518 (MUTE_CONTROL << 8) | 0xff, state->ctrlif | (ftr[3] << 8), data, 1, HZ) < 0)
3519 printk(KERN_WARNING "usbaudio: failure to unmute feature unit %u interface %u\n", ftr[3], state->ctrlif);
3524 static void usb_audio_recurseunit(struct consmixstate *state, unsigned char unitid)
3529 if (test_and_set_bit(unitid, state->unitbitmap)) {
3530 printk(KERN_INFO "usbaudio: mixer path revisits unit %d\n", unitid);
3533 p1 = find_audiocontrol_unit(state->buffer, state->buflen, NULL, unitid, state->ctrlif);
3535 printk(KERN_ERR "usbaudio: unit %d not found!\n", unitid);
3538 state->nrchannels = 0;
3539 state->termtype = 0;
3540 state->chconfig = 0;
3542 case INPUT_TERMINAL:
3544 printk(KERN_ERR "usbaudio: unit %u: invalid INPUT_TERMINAL descriptor\n", unitid);
3547 state->nrchannels = p1[7];
3548 state->termtype = p1[4] | (p1[5] << 8);
3549 state->chconfig = p1[8] | (p1[9] << 8);
3553 if (p1[0] < 10 || p1[0] < 10+p1[4]) {
3554 printk(KERN_ERR "usbaudio: unit %u: invalid MIXER_UNIT descriptor\n", unitid);
3557 usb_audio_mixerunit(state, p1);
3561 if (p1[0] < 6 || p1[0] < 6+p1[4]) {
3562 printk(KERN_ERR "usbaudio: unit %u: invalid SELECTOR_UNIT descriptor\n", unitid);
3565 usb_audio_selectorunit(state, p1);
3568 case FEATURE_UNIT: /* See USB Audio Class Spec 4.3.2.5 */
3569 if (p1[0] < 7 || p1[0] < 7+p1[5]) {
3570 printk(KERN_ERR "usbaudio: unit %u: invalid FEATURE_UNIT descriptor\n", unitid);
3573 usb_audio_featureunit(state, p1);
3576 case PROCESSING_UNIT:
3577 if (p1[0] < 13 || p1[0] < 13+p1[6] || p1[0] < 13+p1[6]+p1[11+p1[6]]) {
3578 printk(KERN_ERR "usbaudio: unit %u: invalid PROCESSING_UNIT descriptor\n", unitid);
3581 usb_audio_processingunit(state, p1);
3584 case EXTENSION_UNIT:
3585 if (p1[0] < 13 || p1[0] < 13+p1[6] || p1[0] < 13+p1[6]+p1[11+p1[6]]) {
3586 printk(KERN_ERR "usbaudio: unit %u: invalid EXTENSION_UNIT descriptor\n", unitid);
3589 for (j = i = 0; i < p1[6]; i++) {
3590 usb_audio_recurseunit(state, p1[7+i]);
3592 j = state->termtype;
3593 else if (j != state->termtype)
3596 state->nrchannels = p1[7+p1[6]];
3597 state->chconfig = p1[8+p1[6]] | (p1[9+p1[6]] << 8);
3598 state->termtype = j;
3602 printk(KERN_ERR "usbaudio: unit %u: unexpected type 0x%02x\n", unitid, p1[2]);
3607 static void usb_audio_constructmixer(struct usb_audio_state *s, unsigned char *buffer, unsigned int buflen, unsigned int ctrlif, unsigned char *oterm)
3609 struct usb_mixerdev *ms;
3610 struct consmixstate state;
3612 memset(&state, 0, sizeof(state));
3615 state.mixchmask = ~0;
3616 state.buffer = buffer;
3617 state.buflen = buflen;
3618 state.ctrlif = ctrlif;
3619 set_bit(oterm[3], state.unitbitmap); /* mark terminal ID as visited */
3620 printk(KERN_DEBUG "usbaudio: constructing mixer for Terminal %u type 0x%04x\n",
3621 oterm[3], oterm[4] | (oterm[5] << 8));
3622 usb_audio_recurseunit(&state, oterm[7]);
3623 if (!state.nrmixch) {
3624 printk(KERN_INFO "usbaudio: no mixer controls found for Terminal %u\n", oterm[3]);
3627 if (!(ms = kmalloc(sizeof(struct usb_mixerdev)+state.nrmixch*sizeof(struct mixerchannel), GFP_KERNEL)))
3629 memset(ms, 0, sizeof(struct usb_mixerdev));
3630 memcpy(&ms->ch, &state.mixch, state.nrmixch*sizeof(struct mixerchannel));
3633 ms->numch = state.nrmixch;
3634 if ((ms->dev_mixer = register_sound_mixer(&usb_mixer_fops, -1)) < 0) {
3635 printk(KERN_ERR "usbaudio: cannot register mixer\n");
3639 printk(KERN_INFO "usbaudio: registered mixer 14,%d\n", ms->dev_mixer);
3640 list_add_tail(&ms->list, &s->mixerlist);
3643 /* arbitrary limit, we won't check more interfaces than this */
3644 #define USB_MAXINTERFACES 32
3646 static struct usb_audio_state *usb_audio_parsecontrol(struct usb_device *dev, unsigned char *buffer, unsigned int buflen, unsigned int ctrlif)
3648 struct usb_audio_state *s;
3649 struct usb_interface *iface;
3650 struct usb_host_interface *alt;
3651 unsigned char ifin[USB_MAXINTERFACES], ifout[USB_MAXINTERFACES];
3653 unsigned int i, j, k, numifin = 0, numifout = 0;
3655 if (!(s = kmalloc(sizeof(struct usb_audio_state), GFP_KERNEL)))
3657 memset(s, 0, sizeof(struct usb_audio_state));
3658 INIT_LIST_HEAD(&s->audiolist);
3659 INIT_LIST_HEAD(&s->mixerlist);
3663 /* find audiocontrol interface */
3664 if (!(p1 = find_csinterface_descriptor(buffer, buflen, NULL, HEADER, ctrlif, -1))) {
3665 printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u no HEADER found\n",
3666 dev->devnum, ctrlif);
3669 if (p1[0] < 8 + p1[7]) {
3670 printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u HEADER error\n",
3671 dev->devnum, ctrlif);
3675 printk(KERN_INFO "usbaudio: device %d audiocontrol interface %u has no AudioStreaming and MidiStreaming interfaces\n",
3676 dev->devnum, ctrlif);
3677 for (i = 0; i < p1[7]; i++) {
3679 iface = usb_ifnum_to_if(dev, j);
3681 printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u interface %u does not exist\n",
3682 dev->devnum, ctrlif, j);
3685 if (iface->num_altsetting == 1) {
3686 printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u has only 1 altsetting.\n", dev->devnum, ctrlif);
3689 alt = usb_altnum_to_altsetting(iface, 0);
3691 printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u interface %u has no altsetting 0\n",
3692 dev->devnum, ctrlif, j);
3695 if (alt->desc.bInterfaceClass != USB_CLASS_AUDIO) {
3696 printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u interface %u is not an AudioClass interface\n",
3697 dev->devnum, ctrlif, j);
3700 if (alt->desc.bInterfaceSubClass == 3) {
3701 printk(KERN_INFO "usbaudio: device %d audiocontrol interface %u interface %u MIDIStreaming not supported\n",
3702 dev->devnum, ctrlif, j);
3705 if (alt->desc.bInterfaceSubClass != 2) {
3706 printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u interface %u invalid AudioClass subtype\n",
3707 dev->devnum, ctrlif, j);
3710 if (alt->desc.bNumEndpoints > 0) {
3711 /* Check all endpoints; should they all have a bandwidth of 0 ? */
3712 for (k = 0; k < alt->desc.bNumEndpoints; k++) {
3713 if (alt->endpoint[k].desc.wMaxPacketSize > 0) {
3714 printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u endpoint %d does not have 0 bandwidth at alt[0]\n", dev->devnum, ctrlif, k);
3718 if (k < alt->desc.bNumEndpoints)
3722 alt = usb_altnum_to_altsetting(iface, 1);
3724 printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u interface %u has no altsetting 1\n",
3725 dev->devnum, ctrlif, j);
3728 if (alt->desc.bNumEndpoints < 1) {
3729 printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u interface %u has no endpoint\n",
3730 dev->devnum, ctrlif, j);
3733 /* note: this requires the data endpoint to be ep0 and the optional sync
3734 ep to be ep1, which seems to be the case */
3735 if (alt->endpoint[0].desc.bEndpointAddress & USB_DIR_IN) {
3736 if (numifin < USB_MAXINTERFACES) {
3737 ifin[numifin++] = j;
3738 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1);
3741 if (numifout < USB_MAXINTERFACES) {
3742 ifout[numifout++] = j;
3743 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1);
3747 printk(KERN_INFO "usbaudio: device %d audiocontrol interface %u has %u input and %u output AudioStreaming interfaces\n",
3748 dev->devnum, ctrlif, numifin, numifout);
3749 for (i = 0; i < numifin && i < numifout; i++)
3750 usb_audio_parsestreaming(s, buffer, buflen, ifin[i], ifout[i]);
3751 for (j = i; j < numifin; j++)
3752 usb_audio_parsestreaming(s, buffer, buflen, ifin[i], -1);
3753 for (j = i; j < numifout; j++)
3754 usb_audio_parsestreaming(s, buffer, buflen, -1, ifout[i]);
3755 /* now walk through all OUTPUT_TERMINAL descriptors to search for mixers */
3756 p1 = find_csinterface_descriptor(buffer, buflen, NULL, OUTPUT_TERMINAL, ctrlif, -1);
3759 usb_audio_constructmixer(s, buffer, buflen, ctrlif, p1);
3760 p1 = find_csinterface_descriptor(buffer, buflen, p1, OUTPUT_TERMINAL, ctrlif, -1);
3764 if (list_empty(&s->audiolist) && list_empty(&s->mixerlist)) {
3768 /* everything successful */
3770 list_add_tail(&s->audiodev, &audiodevs);
3772 printk(KERN_DEBUG "usb_audio_parsecontrol: usb_audio_state at %p\n", s);
3776 /* we only care for the currently active configuration */
3778 static int usb_audio_probe(struct usb_interface *intf,
3779 const struct usb_device_id *id)
3781 struct usb_device *dev = interface_to_usbdev (intf);
3782 struct usb_audio_state *s;
3783 unsigned char *buffer;
3784 unsigned int buflen;
3787 printk(KERN_DEBUG "usbaudio: Probing if %i: IC %x, ISC %x\n", ifnum,
3788 config->interface[ifnum].altsetting[0].desc.bInterfaceClass,
3789 config->interface[ifnum].altsetting[0].desc.bInterfaceSubClass);
3793 * audiocontrol interface found
3794 * find which configuration number is active
3796 buffer = dev->rawdescriptors[dev->actconfig - dev->config];
3797 buflen = dev->actconfig->desc.wTotalLength;
3798 s = usb_audio_parsecontrol(dev, buffer, buflen, intf->altsetting->desc.bInterfaceNumber);
3800 usb_set_intfdata (intf, s);
3807 /* a revoke facility would make things simpler */
3809 static void usb_audio_disconnect(struct usb_interface *intf)
3811 struct usb_audio_state *s = usb_get_intfdata (intf);
3812 struct list_head *list;
3813 struct usb_audiodev *as;
3814 struct usb_mixerdev *ms;
3819 /* we get called with -1 for every audiostreaming interface registered */
3820 if (s == (struct usb_audio_state *)-1) {
3821 dprintk((KERN_DEBUG "usbaudio: note, usb_audio_disconnect called with -1\n"));
3825 dprintk((KERN_DEBUG "usbaudio: error, usb_audio_disconnect already called for %p!\n", s));
3829 list_del_init(&s->audiodev);
3831 usb_set_intfdata (intf, NULL);
3833 /* deregister all audio and mixer devices, so no new processes can open this device */
3834 for(list = s->audiolist.next; list != &s->audiolist; list = list->next) {
3835 as = list_entry(list, struct usb_audiodev, list);
3838 wake_up(&as->usbin.dma.wait);
3839 wake_up(&as->usbout.dma.wait);
3840 if (as->dev_audio >= 0) {
3841 unregister_sound_dsp(as->dev_audio);
3842 printk(KERN_INFO "usbaudio: unregister dsp 14,%d\n", as->dev_audio);
3846 for(list = s->mixerlist.next; list != &s->mixerlist; list = list->next) {
3847 ms = list_entry(list, struct usb_mixerdev, list);
3848 if (ms->dev_mixer >= 0) {
3849 unregister_sound_mixer(ms->dev_mixer);
3850 printk(KERN_INFO "usbaudio: unregister mixer 14,%d\n", ms->dev_mixer);
3855 wake_up(&open_wait);
3858 static int __init usb_audio_init(void)
3860 int result = usb_register(&usb_audio_driver);
3862 info(DRIVER_VERSION ":" DRIVER_DESC);
3867 static void __exit usb_audio_cleanup(void)
3869 usb_deregister(&usb_audio_driver);
3872 module_init(usb_audio_init);
3873 module_exit(usb_audio_cleanup);
3875 MODULE_AUTHOR( DRIVER_AUTHOR );
3876 MODULE_DESCRIPTION( DRIVER_DESC );
3877 MODULE_LICENSE("GPL");