drivers/usb/class/audio.c

   1 /*****************************************************************************/
   2
   3 /*
   4  *      audio.c  --  USB Audio Class driver
   5  *
   6  *      Copyright (C) 1999, 2000, 2001, 2003, 2004
   7  *          Alan Cox (alan@lxorguk.ukuu.org.uk)
   8  *          Thomas Sailer (sailer@ife.ee.ethz.ch)
   9  *
  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.
  14  *
  15  * Debugging:
  16  *      Use the 'lsusb' utility to dump the descriptors.
  17  *
  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
  45  *              from the USB port)
  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
  54  *              decent headphones!
  55  *              "Let's make things better" -> but please Philips start with your
  56  *              own stuff!!!!
  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
  82  *              audio descriptors.
  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.
 108  *
 109  */
 110
 111 /*
 112  * Strategy:
 113  *
 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.
 118  *
 119  * Data IO implementation issues
 120  *
 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.
 126  *
 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.
 133  *
 134  * Current status: no known HCD-specific issues.
 135  *
 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
 139  * used.
 140  *
 141  * Parsing implementation issues
 142  *
 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.
 146  *
 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.
 158  *
 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.
 166  *
 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.
 178  */
 179
 180 /*****************************************************************************/
 181
 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>
 197 #include <asm/io.h>
 198 #include <linux/usb.h>
 199
 200 #include "audio.h"
 201
 202 /*
 203  * Version Information
 204  */
 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"
 208
 209 #define AUDIO_DEBUG 1
 210
 211 #define SND_DEV_DSP16   5
 212
 213 #define dprintk(x)
 214
 215 /* --------------------------------------------------------------------- */
 216
 217 /*
 218  * Linked list of all audio devices...
 219  */
 220 static struct list_head audiodevs = LIST_HEAD_INIT(audiodevs);
 221 static DECLARE_MUTEX(open_sem);
 222
 223 /*
 224  * wait queue for processes wanting to open an USB audio device
 225  */
 226 static DECLARE_WAIT_QUEUE_HEAD(open_wait);
 227
 228
 229 #define MAXFORMATS        MAX_ALT
 230 #define DMABUFSHIFT       17  /* 128k worth of DMA buffer */
 231 #define NRSGBUF           (1U<<(DMABUFSHIFT-PAGE_SHIFT))
 232
 233 /*
 234  * This influences:
 235  * - Latency
 236  * - Interrupt rate
 237  * - Synchronisation behaviour
 238  * Don't touch this if you don't understand all of the above.
 239  */
 240 #define DESCFRAMES  5
 241 #define SYNCFRAMES  DESCFRAMES
 242
 243 #define MIXFLG_STEREOIN   1
 244 #define MIXFLG_STEREOOUT  2
 245
 246 struct mixerchannel {
 247         __u16 value;
 248         __u16 osschannel;  /* number of the OSS channel */
 249         __s16 minval, maxval;
 250         __u16 slctunitid;
 251         __u8 unitid;
 252         __u8 selector;
 253         __u8 chnum;
 254         __u8 flags;
 255 };
 256
 257 struct audioformat {
 258         unsigned int format;
 259         unsigned int sratelo;
 260         unsigned int sratehi;
 261         unsigned char altsetting;
 262         unsigned char attributes;
 263 };
 264
 265 struct dmabuf {
 266         /* buffer data format */
 267         unsigned int format;
 268         unsigned int srate;
 269         /* physical buffer */
 270         unsigned char *sgbuf[NRSGBUF];
 271         unsigned bufsize;
 272         unsigned numfrag;
 273         unsigned fragshift;
 274         unsigned wrptr, rdptr;
 275         unsigned total_bytes;
 276         int count;
 277         unsigned error; /* over/underrun */
 278         wait_queue_head_t wait;
 279         /* redundant, but makes calculations easier */
 280         unsigned fragsize;
 281         unsigned dmasize;
 282         /* OSS stuff */
 283         unsigned mapped:1;
 284         unsigned ready:1;
 285         unsigned ossfragshift;
 286         int ossmaxfrags;
 287         unsigned subdivision;
 288 };
 289
 290 struct usb_audio_state;
 291
 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
 298
 299 struct my_data_urb {
 300         struct urb *urb;
 301 };
 302
 303 struct my_sync_urb {
 304         struct urb *urb;
 305 };
 306
 307
 308 struct usb_audiodev {
 309         struct list_head list;
 310         struct usb_audio_state *state;
 311
 312         /* soundcore stuff */
 313         int dev_audio;
 314
 315         /* wave stuff */
 316         mode_t open_mode;
 317         spinlock_t lock;         /* DMA buffer access spinlock */
 318
 319         struct usbin {
 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 */
 329
 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 */
 332
 333                 struct dmabuf dma;
 334         } usbin;
 335
 336         struct usbout {
 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 */
 347
 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 */
 350
 351                 struct dmabuf dma;
 352         } usbout;
 353
 354
 355         unsigned int numfmtin, numfmtout;
 356         struct audioformat fmtin[MAXFORMATS];
 357         struct audioformat fmtout[MAXFORMATS];
 358 };
 359
 360 struct usb_mixerdev {
 361         struct list_head list;
 362         struct usb_audio_state *state;
 363
 364         /* soundcore stuff */
 365         int dev_mixer;
 366
 367         unsigned char iface;  /* interface number of the AudioControl interface */
 368
 369         /* USB format descriptions */
 370         unsigned int numch, modcnt;
 371
 372         /* mixch is last and gets allocated dynamically */
 373         struct mixerchannel ch[0];
 374 };
 375
 376 struct usb_audio_state {
 377         struct list_head audiodev;
 378
 379         /* USB device */
 380         struct usb_device *usbdev;
 381
 382         struct list_head audiolist;
 383         struct list_head mixerlist;
 384
 385         unsigned count;  /* usage counter; NOTE: the usb stack is also considered a user */
 386 };
 387
 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))
 395
 396 /* --------------------------------------------------------------------- */
 397
 398 static inline unsigned ld2(unsigned int x)
 399 {
 400         unsigned r = 0;
 401
 402         if (x >= 0x10000) {
 403                 x >>= 16;
 404                 r += 16;
 405         }
 406         if (x >= 0x100) {
 407                 x >>= 8;
 408                 r += 8;
 409         }
 410         if (x >= 0x10) {
 411                 x >>= 4;
 412                 r += 4;
 413         }
 414         if (x >= 4) {
 415                 x >>= 2;
 416                 r += 2;
 417         }
 418         if (x >= 2)
 419                 r++;
 420         return r;
 421 }
 422
 423 /* --------------------------------------------------------------------- */
 424
 425 /*
 426  * OSS compatible ring buffer management. The ring buffer may be mmap'ed into
 427  * an application address space.
 428  *
 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.
 433  */
 434
 435 static void dmabuf_release(struct dmabuf *db)
 436 {
 437         unsigned int nr;
 438         void *p;
 439
 440         for(nr = 0; nr < NRSGBUF; nr++) {
 441                 if (!(p = db->sgbuf[nr]))
 442                         continue;
 443                 ClearPageReserved(virt_to_page(p));
 444                 free_page((unsigned long)p);
 445                 db->sgbuf[nr] = NULL;
 446         }
 447         db->mapped = db->ready = 0;
 448 }
 449
 450 static int dmabuf_init(struct dmabuf *db)
 451 {
 452         unsigned int nr, bytepersec, bufs;
 453         void *p;
 454
 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);
 463                 else
 464                         db->fragshift = db->ossfragshift;
 465         } else {
 466                 db->fragshift = ld2(bytepersec/100/(db->subdivision ? db->subdivision : 1));
 467                 if (db->fragshift < 3)
 468                         db->fragshift = 3;
 469         }
 470         db->numfrag = bufs >> db->fragshift;
 471         while (db->numfrag < 4 && db->fragshift > 3) {
 472                 db->fragshift--;
 473                 db->numfrag = bufs >> db->fragshift;
 474         }
 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);
 482                         if (!p)
 483                                 return -ENOMEM;
 484                         db->sgbuf[nr] = p;
 485                         SetPageReserved(virt_to_page(p));
 486                 }
 487                 memset(db->sgbuf[nr], AFMT_ISUNSIGNED(db->format) ? 0x80 : 0, PAGE_SIZE);
 488                 if ((nr << PAGE_SHIFT) >= db->dmasize)
 489                         break;
 490         }
 491         db->bufsize = nr << PAGE_SHIFT;
 492         db->ready = 1;
 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));
 497         return 0;
 498 }
 499
 500 static int dmabuf_mmap(struct vm_area_struct *vma, struct dmabuf *db, unsigned long start, unsigned long size, pgprot_t prot)
 501 {
 502         unsigned int nr;
 503
 504         if (!db->ready || db->mapped || (start | size) & (PAGE_SIZE-1) || size > db->bufsize)
 505                 return -EINVAL;
 506         size >>= PAGE_SHIFT;
 507         for(nr = 0; nr < size; nr++)
 508                 if (!db->sgbuf[nr])
 509                         return -EINVAL;
 510         db->mapped = 1;
 511         for(nr = 0; nr < size; nr++) {
 512                 unsigned long pfn;
 513
 514                 pfn = virt_to_phys(db->sgbuf[nr]) >> PAGE_SHIFT;
 515                 if (remap_pfn_range(vma, start, pfn, PAGE_SIZE, prot))
 516                         return -EAGAIN;
 517                 start += PAGE_SIZE;
 518         }
 519         return 0;
 520 }
 521
 522 static void dmabuf_copyin(struct dmabuf *db, const void *buffer, unsigned int size)
 523 {
 524         unsigned int pgrem, rem;
 525
 526         db->total_bytes += size;
 527         for (;;) {
 528                 if (size <= 0)
 529                         return;
 530                 pgrem = ((~db->wrptr) & (PAGE_SIZE-1)) + 1;
 531                 if (pgrem > size)
 532                         pgrem = size;
 533                 rem = db->dmasize - db->wrptr;
 534                 if (pgrem > rem)
 535                         pgrem = rem;
 536                 memcpy((db->sgbuf[db->wrptr >> PAGE_SHIFT]) + (db->wrptr & (PAGE_SIZE-1)), buffer, pgrem);
 537                 size -= pgrem;
 538                 buffer += pgrem;
 539                 db->wrptr += pgrem;
 540                 if (db->wrptr >= db->dmasize)
 541                         db->wrptr = 0;
 542         }
 543 }
 544
 545 static void dmabuf_copyout(struct dmabuf *db, void *buffer, unsigned int size)
 546 {
 547         unsigned int pgrem, rem;
 548
 549         db->total_bytes += size;
 550         for (;;) {
 551                 if (size <= 0)
 552                         return;
 553                 pgrem = ((~db->rdptr) & (PAGE_SIZE-1)) + 1;
 554                 if (pgrem > size)
 555                         pgrem = size;
 556                 rem = db->dmasize - db->rdptr;
 557                 if (pgrem > rem)
 558                         pgrem = rem;
 559                 memcpy(buffer, (db->sgbuf[db->rdptr >> PAGE_SHIFT]) + (db->rdptr & (PAGE_SIZE-1)), pgrem);
 560                 size -= pgrem;
 561                 buffer += pgrem;
 562                 db->rdptr += pgrem;
 563                 if (db->rdptr >= db->dmasize)
 564                         db->rdptr = 0;
 565         }
 566 }
 567
 568 static int dmabuf_copyin_user(struct dmabuf *db, unsigned int ptr, const void __user *buffer, unsigned int size)
 569 {
 570         unsigned int pgrem, rem;
 571
 572         if (!db->ready || db->mapped)
 573                 return -EINVAL;
 574         for (;;) {
 575                 if (size <= 0)
 576                         return 0;
 577                 pgrem = ((~ptr) & (PAGE_SIZE-1)) + 1;
 578                 if (pgrem > size)
 579                         pgrem = size;
 580                 rem = db->dmasize - ptr;
 581                 if (pgrem > rem)
 582                         pgrem = rem;
 583                 if (copy_from_user((db->sgbuf[ptr >> PAGE_SHIFT]) + (ptr & (PAGE_SIZE-1)), buffer, pgrem))
 584                         return -EFAULT;
 585                 size -= pgrem;
 586                 buffer += pgrem;
 587                 ptr += pgrem;
 588                 if (ptr >= db->dmasize)
 589                         ptr = 0;
 590         }
 591 }
 592
 593 static int dmabuf_copyout_user(struct dmabuf *db, unsigned int ptr, void __user *buffer, unsigned int size)
 594 {
 595         unsigned int pgrem, rem;
 596
 597         if (!db->ready || db->mapped)
 598                 return -EINVAL;
 599         for (;;) {
 600                 if (size <= 0)
 601                         return 0;
 602                 pgrem = ((~ptr) & (PAGE_SIZE-1)) + 1;
 603                 if (pgrem > size)
 604                         pgrem = size;
 605                 rem = db->dmasize - ptr;
 606                 if (pgrem > rem)
 607                         pgrem = rem;
 608                 if (copy_to_user(buffer, (db->sgbuf[ptr >> PAGE_SHIFT]) + (ptr & (PAGE_SIZE-1)), pgrem))
 609                         return -EFAULT;
 610                 size -= pgrem;
 611                 buffer += pgrem;
 612                 ptr += pgrem;
 613                 if (ptr >= db->dmasize)
 614                         ptr = 0;
 615         }
 616 }
 617
 618 /* --------------------------------------------------------------------- */
 619 /*
 620  * USB I/O code. We do sample format conversion if necessary
 621  */
 622
 623 static void usbin_stop(struct usb_audiodev *as)
 624 {
 625         struct usbin *u = &as->usbin;
 626         unsigned long flags;
 627         unsigned int i, notkilled = 1;
 628
 629         spin_lock_irqsave(&as->lock, flags);
 630         u->flags &= ~FLG_RUNNING;
 631         i = u->flags;
 632         spin_unlock_irqrestore(&as->lock, flags);
 633         while (i & (FLG_URB0RUNNING|FLG_URB1RUNNING|FLG_SYNC0RUNNING|FLG_SYNC1RUNNING)) {
 634                 set_current_state(notkilled ? TASK_INTERRUPTIBLE : TASK_UNINTERRUPTIBLE);
 635                 schedule_timeout(1);
 636                 spin_lock_irqsave(&as->lock, flags);
 637                 i = u->flags;
 638                 spin_unlock_irqrestore(&as->lock, flags);
 639                 if (notkilled && signal_pending(current)) {
 640                         if (i & FLG_URB0RUNNING)
 641                                 usb_kill_urb(u->durb[0].urb);
 642                         if (i & FLG_URB1RUNNING)
 643                                 usb_kill_urb(u->durb[1].urb);
 644                         if (i & FLG_SYNC0RUNNING)
 645                                 usb_kill_urb(u->surb[0].urb);
 646                         if (i & FLG_SYNC1RUNNING)
 647                                 usb_kill_urb(u->surb[1].urb);
 648                         notkilled = 0;
 649                 }
 650         }
 651         set_current_state(TASK_RUNNING);
 652         if (u->durb[0].urb->transfer_buffer)
 653                 kfree(u->durb[0].urb->transfer_buffer);
 654         if (u->durb[1].urb->transfer_buffer)
 655                 kfree(u->durb[1].urb->transfer_buffer);
 656         if (u->surb[0].urb->transfer_buffer)
 657                 kfree(u->surb[0].urb->transfer_buffer);
 658         if (u->surb[1].urb->transfer_buffer)
 659                 kfree(u->surb[1].urb->transfer_buffer);
 660         u->durb[0].urb->transfer_buffer = u->durb[1].urb->transfer_buffer =
 661                 u->surb[0].urb->transfer_buffer = u->surb[1].urb->transfer_buffer = NULL;
 662 }
 663
 664 static inline void usbin_release(struct usb_audiodev *as)
 665 {
 666         usbin_stop(as);
 667 }
 668
 669 static void usbin_disc(struct usb_audiodev *as)
 670 {
 671         struct usbin *u = &as->usbin;
 672
 673         unsigned long flags;
 674
 675         spin_lock_irqsave(&as->lock, flags);
 676         u->flags &= ~(FLG_RUNNING | FLG_CONNECTED);
 677         spin_unlock_irqrestore(&as->lock, flags);
 678         usbin_stop(as);
 679 }
 680
 681 static void conversion(const void *ibuf, unsigned int ifmt, void *obuf, unsigned int ofmt, void *tmp, unsigned int scnt)
 682 {
 683         unsigned int cnt, i;
 684         __s16 *sp, *sp2, s;
 685         unsigned char *bp;
 686
 687         cnt = scnt;
 688         if (AFMT_ISSTEREO(ifmt))
 689                 cnt <<= 1;
 690         sp = ((__s16 *)tmp) + cnt;
 691         switch (ifmt & ~AFMT_STEREO) {
 692         case AFMT_U8:
 693                 for (bp = ((unsigned char *)ibuf)+cnt, i = 0; i < cnt; i++) {
 694                         bp--;
 695                         sp--;
 696                         *sp = (*bp ^ 0x80) << 8;
 697                 }
 698                 break;
 699
 700         case AFMT_S8:
 701                 for (bp = ((unsigned char *)ibuf)+cnt, i = 0; i < cnt; i++) {
 702                         bp--;
 703                         sp--;
 704                         *sp = *bp << 8;
 705                 }
 706                 break;
 707
 708         case AFMT_U16_LE:
 709                 for (bp = ((unsigned char *)ibuf)+2*cnt, i = 0; i < cnt; i++) {
 710                         bp -= 2;
 711                         sp--;
 712                         *sp = (bp[0] | (bp[1] << 8)) ^ 0x8000;
 713                 }
 714                 break;
 715
 716         case AFMT_U16_BE:
 717                 for (bp = ((unsigned char *)ibuf)+2*cnt, i = 0; i < cnt; i++) {
 718                         bp -= 2;
 719                         sp--;
 720                         *sp = (bp[1] | (bp[0] << 8)) ^ 0x8000;
 721                 }
 722                 break;
 723
 724         case AFMT_S16_LE:
 725                 for (bp = ((unsigned char *)ibuf)+2*cnt, i = 0; i < cnt; i++) {
 726                         bp -= 2;
 727                         sp--;
 728                         *sp = bp[0] | (bp[1] << 8);
 729                 }
 730                 break;
 731
 732         case AFMT_S16_BE:
 733                 for (bp = ((unsigned char *)ibuf)+2*cnt, i = 0; i < cnt; i++) {
 734                         bp -= 2;
 735                         sp--;
 736                         *sp = bp[1] | (bp[0] << 8);
 737                 }
 738                 break;
 739         }
 740         if (!AFMT_ISSTEREO(ifmt) && AFMT_ISSTEREO(ofmt)) {
 741                 /* expand from mono to stereo */
 742                 for (sp = ((__s16 *)tmp)+scnt, sp2 = ((__s16 *)tmp)+2*scnt, i = 0; i < scnt; i++) {
 743                         sp--;
 744                         sp2 -= 2;
 745                         sp2[0] = sp2[1] = sp[0];
 746                 }
 747         }
 748         if (AFMT_ISSTEREO(ifmt) && !AFMT_ISSTEREO(ofmt)) {
 749                 /* contract from stereo to mono */
 750                 for (sp = sp2 = ((__s16 *)tmp), i = 0; i < scnt; i++, sp++, sp2 += 2)
 751                         sp[0] = (sp2[0] + sp2[1]) >> 1;
 752         }
 753         cnt = scnt;
 754         if (AFMT_ISSTEREO(ofmt))
 755                 cnt <<= 1;
 756         sp = ((__s16 *)tmp);
 757         bp = ((unsigned char *)obuf);
 758         switch (ofmt & ~AFMT_STEREO) {
 759         case AFMT_U8:
 760                 for (i = 0; i < cnt; i++, sp++, bp++)
 761                         *bp = (*sp >> 8) ^ 0x80;
 762                 break;
 763
 764         case AFMT_S8:
 765                 for (i = 0; i < cnt; i++, sp++, bp++)
 766                         *bp = *sp >> 8;
 767                 break;
 768
 769         case AFMT_U16_LE:
 770                 for (i = 0; i < cnt; i++, sp++, bp += 2) {
 771                         s = *sp;
 772                         bp[0] = s;
 773                         bp[1] = (s >> 8) ^ 0x80;
 774                 }
 775                 break;
 776
 777         case AFMT_U16_BE:
 778                 for (i = 0; i < cnt; i++, sp++, bp += 2) {
 779                         s = *sp;
 780                         bp[1] = s;
 781                         bp[0] = (s >> 8) ^ 0x80;
 782                 }
 783                 break;
 784
 785         case AFMT_S16_LE:
 786                 for (i = 0; i < cnt; i++, sp++, bp += 2) {
 787                         s = *sp;
 788                         bp[0] = s;
 789                         bp[1] = s >> 8;
 790                 }
 791                 break;
 792
 793         case AFMT_S16_BE:
 794                 for (i = 0; i < cnt; i++, sp++, bp += 2) {
 795                         s = *sp;
 796                         bp[1] = s;
 797                         bp[0] = s >> 8;
 798                 }
 799                 break;
 800         }
 801
 802 }
 803
 804 static void usbin_convert(struct usbin *u, unsigned char *buffer, unsigned int samples)
 805 {
 806         union {
 807                 __s16 s[64];
 808                 unsigned char b[0];
 809         } tmp;
 810         unsigned int scnt, maxs, ufmtsh, dfmtsh;
 811
 812         ufmtsh = AFMT_BYTESSHIFT(u->format);
 813         dfmtsh = AFMT_BYTESSHIFT(u->dma.format);
 814         maxs = (AFMT_ISSTEREO(u->dma.format | u->format)) ? 32 : 64;
 815         while (samples > 0) {
 816                 scnt = samples;
 817                 if (scnt > maxs)
 818                         scnt = maxs;
 819                 conversion(buffer, u->format, tmp.b, u->dma.format, tmp.b, scnt);
 820                 dmabuf_copyin(&u->dma, tmp.b, scnt << dfmtsh);
 821                 buffer += scnt << ufmtsh;
 822                 samples -= scnt;
 823         }
 824 }
 825
 826 static int usbin_prepare_desc(struct usbin *u, struct urb *urb)
 827 {
 828         unsigned int i, maxsize, offs;
 829
 830         maxsize = (u->freqmax + 0x3fff) >> (14 - AFMT_BYTESSHIFT(u->format));
 831         //printk(KERN_DEBUG "usbin_prepare_desc: maxsize %d freq 0x%x format 0x%x\n", maxsize, u->freqn, u->format);
 832         for (i = offs = 0; i < DESCFRAMES; i++, offs += maxsize) {
 833                 urb->iso_frame_desc[i].length = maxsize;
 834                 urb->iso_frame_desc[i].offset = offs;
 835         }
 836         urb->interval = 1;
 837         return 0;
 838 }
 839
 840 /*
 841  * return value: 0 if descriptor should be restarted, -1 otherwise
 842  * convert sample format on the fly if necessary
 843  */
 844 static int usbin_retire_desc(struct usbin *u, struct urb *urb)
 845 {
 846         unsigned int i, ufmtsh, dfmtsh, err = 0, cnt, scnt, dmafree;
 847         unsigned char *cp;
 848
 849         ufmtsh = AFMT_BYTESSHIFT(u->format);
 850         dfmtsh = AFMT_BYTESSHIFT(u->dma.format);
 851         for (i = 0; i < DESCFRAMES; i++) {
 852                 cp = ((unsigned char *)urb->transfer_buffer) + urb->iso_frame_desc[i].offset;
 853                 if (urb->iso_frame_desc[i].status) {
 854                         dprintk((KERN_DEBUG "usbin_retire_desc: frame %u status %d\n", i, urb->iso_frame_desc[i].status));
 855                         continue;
 856                 }
 857                 scnt = urb->iso_frame_desc[i].actual_length >> ufmtsh;
 858                 if (!scnt)
 859                         continue;
 860                 cnt = scnt << dfmtsh;
 861                 if (!u->dma.mapped) {
 862                         dmafree = u->dma.dmasize - u->dma.count;
 863                         if (cnt > dmafree) {
 864                                 scnt = dmafree >> dfmtsh;
 865                                 cnt = scnt << dfmtsh;
 866                                 err++;
 867                         }
 868                 }
 869                 u->dma.count += cnt;
 870                 if (u->format == u->dma.format) {
 871                         /* we do not need format conversion */
 872                         dprintk((KERN_DEBUG "usbaudio: no sample format conversion\n"));
 873                         dmabuf_copyin(&u->dma, cp, cnt);
 874                 } else {
 875                         /* we need sampling format conversion */
 876                         dprintk((KERN_DEBUG "usbaudio: sample format conversion %x != %x\n", u->format, u->dma.format));
 877                         usbin_convert(u, cp, scnt);
 878                 }
 879         }
 880         if (err)
 881                 u->dma.error++;
 882         if (u->dma.count >= (signed)u->dma.fragsize)
 883                 wake_up(&u->dma.wait);
 884         return err ? -1 : 0;
 885 }
 886
 887 static void usbin_completed(struct urb *urb, struct pt_regs *regs)
 888 {
 889         struct usb_audiodev *as = (struct usb_audiodev *)urb->context;
 890         struct usbin *u = &as->usbin;
 891         unsigned long flags;
 892         unsigned int mask;
 893         int suret = 0;
 894
 895 #if 0
 896         printk(KERN_DEBUG "usbin_completed: status %d errcnt %d flags 0x%x\n", urb->status, urb->error_count, u->flags);
 897 #endif
 898         if (urb == u->durb[0].urb)
 899                 mask = FLG_URB0RUNNING;
 900         else if (urb == u->durb[1].urb)
 901                 mask = FLG_URB1RUNNING;
 902         else {
 903                 mask = 0;
 904                 printk(KERN_ERR "usbin_completed: panic: unknown URB\n");
 905         }
 906         urb->dev = as->state->usbdev;
 907         spin_lock_irqsave(&as->lock, flags);
 908         if (!usbin_retire_desc(u, urb) &&
 909             u->flags & FLG_RUNNING &&
 910             !usbin_prepare_desc(u, urb) &&
 911             (suret = usb_submit_urb(urb, GFP_ATOMIC)) == 0) {
 912                 u->flags |= mask;
 913         } else {
 914                 u->flags &= ~(mask | FLG_RUNNING);
 915                 wake_up(&u->dma.wait);
 916                 printk(KERN_DEBUG "usbin_completed: descriptor not restarted (usb_submit_urb: %d)\n", suret);
 917         }
 918         spin_unlock_irqrestore(&as->lock, flags);
 919 }
 920
 921 /*
 922  * we output sync data
 923  */
 924 static int usbin_sync_prepare_desc(struct usbin *u, struct urb *urb)
 925 {
 926         unsigned char *cp = urb->transfer_buffer;
 927         unsigned int i, offs;
 928
 929         for (i = offs = 0; i < SYNCFRAMES; i++, offs += 3, cp += 3) {
 930                 urb->iso_frame_desc[i].length = 3;
 931                 urb->iso_frame_desc[i].offset = offs;
 932                 cp[0] = u->freqn;
 933                 cp[1] = u->freqn >> 8;
 934                 cp[2] = u->freqn >> 16;
 935         }
 936         urb->interval = 1;
 937         return 0;
 938 }
 939
 940 /*
 941  * return value: 0 if descriptor should be restarted, -1 otherwise
 942  */
 943 static int usbin_sync_retire_desc(struct usbin *u, struct urb *urb)
 944 {
 945         unsigned int i;
 946
 947         for (i = 0; i < SYNCFRAMES; i++)
 948                 if (urb->iso_frame_desc[0].status)
 949                         dprintk((KERN_DEBUG "usbin_sync_retire_desc: frame %u status %d\n", i, urb->iso_frame_desc[i].status));
 950         return 0;
 951 }
 952
 953 static void usbin_sync_completed(struct urb *urb, struct pt_regs *regs)
 954 {
 955         struct usb_audiodev *as = (struct usb_audiodev *)urb->context;
 956         struct usbin *u = &as->usbin;
 957         unsigned long flags;
 958         unsigned int mask;
 959         int suret = 0;
 960
 961 #if 0
 962         printk(KERN_DEBUG "usbin_sync_completed: status %d errcnt %d flags 0x%x\n", urb->status, urb->error_count, u->flags);
 963 #endif
 964         if (urb == u->surb[0].urb)
 965                 mask = FLG_SYNC0RUNNING;
 966         else if (urb == u->surb[1].urb)
 967                 mask = FLG_SYNC1RUNNING;
 968         else {
 969                 mask = 0;
 970                 printk(KERN_ERR "usbin_sync_completed: panic: unknown URB\n");
 971         }
 972         urb->dev = as->state->usbdev;
 973         spin_lock_irqsave(&as->lock, flags);
 974         if (!usbin_sync_retire_desc(u, urb) &&
 975             u->flags & FLG_RUNNING &&
 976             !usbin_sync_prepare_desc(u, urb) &&
 977             (suret = usb_submit_urb(urb, GFP_ATOMIC)) == 0) {
 978                 u->flags |= mask;
 979         } else {
 980                 u->flags &= ~(mask | FLG_RUNNING);
 981                 wake_up(&u->dma.wait);
 982                 dprintk((KERN_DEBUG "usbin_sync_completed: descriptor not restarted (usb_submit_urb: %d)\n", suret));
 983         }
 984         spin_unlock_irqrestore(&as->lock, flags);
 985 }
 986
 987 static int usbin_start(struct usb_audiodev *as)
 988 {
 989         struct usb_device *dev = as->state->usbdev;
 990         struct usbin *u = &as->usbin;
 991         struct urb *urb;
 992         unsigned long flags;
 993         unsigned int maxsze, bufsz;
 994
 995 #if 0
 996         printk(KERN_DEBUG "usbin_start: device %d ufmt 0x%08x dfmt 0x%08x srate %d\n",
 997                dev->devnum, u->format, u->dma.format, u->dma.srate);
 998 #endif
 999         /* allocate USB storage if not already done */
1000         spin_lock_irqsave(&as->lock, flags);
1001         if (!(u->flags & FLG_CONNECTED)) {
1002                 spin_unlock_irqrestore(&as->lock, flags);
1003                 return -EIO;
1004         }
1005         if (!(u->flags & FLG_RUNNING)) {
1006                 spin_unlock_irqrestore(&as->lock, flags);
1007                 u->freqn = ((u->dma.srate << 11) + 62) / 125; /* this will overflow at approx 2MSPS */
1008                 u->freqmax = u->freqn + (u->freqn >> 2);
1009                 u->phase = 0;
1010                 maxsze = (u->freqmax + 0x3fff) >> (14 - AFMT_BYTESSHIFT(u->format));
1011                 bufsz = DESCFRAMES * maxsze;
1012                 if (u->durb[0].urb->transfer_buffer)
1013                         kfree(u->durb[0].urb->transfer_buffer);
1014                 u->durb[0].urb->transfer_buffer = kmalloc(bufsz, GFP_KERNEL);
1015                 u->durb[0].urb->transfer_buffer_length = bufsz;
1016                 if (u->durb[1].urb->transfer_buffer)
1017                         kfree(u->durb[1].urb->transfer_buffer);
1018                 u->durb[1].urb->transfer_buffer = kmalloc(bufsz, GFP_KERNEL);
1019                 u->durb[1].urb->transfer_buffer_length = bufsz;
1020                 if (u->syncpipe) {
1021                         if (u->surb[0].urb->transfer_buffer)
1022                                 kfree(u->surb[0].urb->transfer_buffer);
1023                         u->surb[0].urb->transfer_buffer = kmalloc(3*SYNCFRAMES, GFP_KERNEL);
1024                         u->surb[0].urb->transfer_buffer_length = 3*SYNCFRAMES;
1025                         if (u->surb[1].urb->transfer_buffer)
1026                                 kfree(u->surb[1].urb->transfer_buffer);
1027                         u->surb[1].urb->transfer_buffer = kmalloc(3*SYNCFRAMES, GFP_KERNEL);
1028                         u->surb[1].urb->transfer_buffer_length = 3*SYNCFRAMES;
1029                 }
1030                 if (!u->durb[0].urb->transfer_buffer || !u->durb[1].urb->transfer_buffer ||
1031                     (u->syncpipe && (!u->surb[0].urb->transfer_buffer || !u->surb[1].urb->transfer_buffer))) {
1032                         printk(KERN_ERR "usbaudio: cannot start playback device %d\n", dev->devnum);
1033                         return 0;
1034                 }
1035                 spin_lock_irqsave(&as->lock, flags);
1036         }
1037         if (u->dma.count >= u->dma.dmasize && !u->dma.mapped) {
1038                 spin_unlock_irqrestore(&as->lock, flags);
1039                 return 0;
1040         }
1041         u->flags |= FLG_RUNNING;
1042         if (!(u->flags & FLG_URB0RUNNING)) {
1043                 urb = u->durb[0].urb;
1044                 urb->dev = dev;
1045                 urb->pipe = u->datapipe;
1046                 urb->transfer_flags = URB_ISO_ASAP;
1047                 urb->number_of_packets = DESCFRAMES;
1048                 urb->context = as;
1049                 urb->complete = usbin_completed;
1050                 if (!usbin_prepare_desc(u, urb) && !usb_submit_urb(urb, GFP_KERNEL))
1051                         u->flags |= FLG_URB0RUNNING;
1052                 else
1053                         u->flags &= ~FLG_RUNNING;
1054         }
1055         if (u->flags & FLG_RUNNING && !(u->flags & FLG_URB1RUNNING)) {
1056                 urb = u->durb[1].urb;
1057                 urb->dev = dev;
1058                 urb->pipe = u->datapipe;
1059                 urb->transfer_flags = URB_ISO_ASAP;
1060                 urb->number_of_packets = DESCFRAMES;
1061                 urb->context = as;
1062                 urb->complete = usbin_completed;
1063                 if (!usbin_prepare_desc(u, urb) && !usb_submit_urb(urb, GFP_KERNEL))
1064                         u->flags |= FLG_URB1RUNNING;
1065                 else
1066                         u->flags &= ~FLG_RUNNING;
1067         }
1068         if (u->syncpipe) {
1069                 if (u->flags & FLG_RUNNING && !(u->flags & FLG_SYNC0RUNNING)) {
1070                         urb = u->surb[0].urb;
1071                         urb->dev = dev;
1072                         urb->pipe = u->syncpipe;
1073                         urb->transfer_flags = URB_ISO_ASAP;
1074                         urb->number_of_packets = SYNCFRAMES;
1075                         urb->context = as;
1076                         urb->complete = usbin_sync_completed;
1077                         /* stride: u->syncinterval */
1078                         if (!usbin_sync_prepare_desc(u, urb) && !usb_submit_urb(urb, GFP_KERNEL))
1079                                 u->flags |= FLG_SYNC0RUNNING;
1080                         else
1081                                 u->flags &= ~FLG_RUNNING;
1082                 }
1083                 if (u->flags & FLG_RUNNING && !(u->flags & FLG_SYNC1RUNNING)) {
1084                         urb = u->surb[1].urb;
1085                         urb->dev = dev;
1086                         urb->pipe = u->syncpipe;
1087                         urb->transfer_flags = URB_ISO_ASAP;
1088                         urb->number_of_packets = SYNCFRAMES;
1089                         urb->context = as;
1090                         urb->complete = usbin_sync_completed;
1091                         /* stride: u->syncinterval */
1092                         if (!usbin_sync_prepare_desc(u, urb) && !usb_submit_urb(urb, GFP_KERNEL))
1093                                 u->flags |= FLG_SYNC1RUNNING;
1094                         else
1095                                 u->flags &= ~FLG_RUNNING;
1096                 }
1097         }
1098         spin_unlock_irqrestore(&as->lock, flags);
1099         return 0;
1100 }
1101
1102 static void usbout_stop(struct usb_audiodev *as)
1103 {
1104         struct usbout *u = &as->usbout;
1105         unsigned long flags;
1106         unsigned int i, notkilled = 1;
1107
1108         spin_lock_irqsave(&as->lock, flags);
1109         u->flags &= ~FLG_RUNNING;
1110         i = u->flags;
1111         spin_unlock_irqrestore(&as->lock, flags);
1112         while (i & (FLG_URB0RUNNING|FLG_URB1RUNNING|FLG_SYNC0RUNNING|FLG_SYNC1RUNNING)) {
1113                 set_current_state(notkilled ? TASK_INTERRUPTIBLE : TASK_UNINTERRUPTIBLE);
1114                 schedule_timeout(1);
1115                 spin_lock_irqsave(&as->lock, flags);
1116                 i = u->flags;
1117                 spin_unlock_irqrestore(&as->lock, flags);
1118                 if (notkilled && signal_pending(current)) {
1119                         if (i & FLG_URB0RUNNING)
1120                                 usb_kill_urb(u->durb[0].urb);
1121                         if (i & FLG_URB1RUNNING)
1122                                 usb_kill_urb(u->durb[1].urb);
1123                         if (i & FLG_SYNC0RUNNING)
1124                                 usb_kill_urb(u->surb[0].urb);
1125                         if (i & FLG_SYNC1RUNNING)
1126                                 usb_kill_urb(u->surb[1].urb);
1127                         notkilled = 0;
1128                 }
1129         }
1130         set_current_state(TASK_RUNNING);
1131         if (u->durb[0].urb->transfer_buffer)
1132                 kfree(u->durb[0].urb->transfer_buffer);
1133         if (u->durb[1].urb->transfer_buffer)
1134                 kfree(u->durb[1].urb->transfer_buffer);
1135         if (u->surb[0].urb->transfer_buffer)
1136                 kfree(u->surb[0].urb->transfer_buffer);
1137         if (u->surb[1].urb->transfer_buffer)
1138                 kfree(u->surb[1].urb->transfer_buffer);
1139         u->durb[0].urb->transfer_buffer = u->durb[1].urb->transfer_buffer =
1140                 u->surb[0].urb->transfer_buffer = u->surb[1].urb->transfer_buffer = NULL;
1141 }
1142
1143 static inline void usbout_release(struct usb_audiodev *as)
1144 {
1145         usbout_stop(as);
1146 }
1147
1148 static void usbout_disc(struct usb_audiodev *as)
1149 {
1150         struct usbout *u = &as->usbout;
1151         unsigned long flags;
1152
1153         spin_lock_irqsave(&as->lock, flags);
1154         u->flags &= ~(FLG_RUNNING | FLG_CONNECTED);
1155         spin_unlock_irqrestore(&as->lock, flags);
1156         usbout_stop(as);
1157 }
1158
1159 static void usbout_convert(struct usbout *u, unsigned char *buffer, unsigned int samples)
1160 {
1161         union {
1162                 __s16 s[64];
1163                 unsigned char b[0];
1164         } tmp;
1165         unsigned int scnt, maxs, ufmtsh, dfmtsh;
1166
1167         ufmtsh = AFMT_BYTESSHIFT(u->format);
1168         dfmtsh = AFMT_BYTESSHIFT(u->dma.format);
1169         maxs = (AFMT_ISSTEREO(u->dma.format | u->format)) ? 32 : 64;
1170         while (samples > 0) {
1171                 scnt = samples;
1172                 if (scnt > maxs)
1173                         scnt = maxs;
1174                 dmabuf_copyout(&u->dma, tmp.b, scnt << dfmtsh);
1175                 conversion(tmp.b, u->dma.format, buffer, u->format, tmp.b, scnt);
1176                 buffer += scnt << ufmtsh;
1177                 samples -= scnt;
1178         }
1179 }
1180
1181 static int usbout_prepare_desc(struct usbout *u, struct urb *urb)
1182 {
1183         unsigned int i, ufmtsh, dfmtsh, err = 0, cnt, scnt, offs;
1184         unsigned char *cp = urb->transfer_buffer;
1185
1186         ufmtsh = AFMT_BYTESSHIFT(u->format);
1187         dfmtsh = AFMT_BYTESSHIFT(u->dma.format);
1188         for (i = offs = 0; i < DESCFRAMES; i++) {
1189                 urb->iso_frame_desc[i].offset = offs;
1190                 u->phase = (u->phase & 0x3fff) + u->freqm;
1191                 scnt = u->phase >> 14;
1192                 if (!scnt) {
1193                         urb->iso_frame_desc[i].length = 0;
1194                         continue;
1195                 }
1196                 cnt = scnt << dfmtsh;
1197                 if (!u->dma.mapped) {
1198                         if (cnt > u->dma.count) {
1199                                 scnt = u->dma.count >> dfmtsh;
1200                                 cnt = scnt << dfmtsh;
1201                                 err++;
1202                         }
1203                         u->dma.count -= cnt;
1204                 } else
1205                         u->dma.count += cnt;
1206                 if (u->format == u->dma.format) {
1207                         /* we do not need format conversion */
1208                         dmabuf_copyout(&u->dma, cp, cnt);
1209                 } else {
1210                         /* we need sampling format conversion */
1211                         usbout_convert(u, cp, scnt);
1212                 }
1213                 cnt = scnt << ufmtsh;
1214                 urb->iso_frame_desc[i].length = cnt;
1215                 offs += cnt;
1216                 cp += cnt;
1217         }
1218         urb->interval = 1;
1219         if (err)
1220                 u->dma.error++;
1221         if (u->dma.mapped) {
1222                 if (u->dma.count >= (signed)u->dma.fragsize)
1223                         wake_up(&u->dma.wait);
1224         } else {
1225                 if ((signed)u->dma.dmasize >= u->dma.count + (signed)u->dma.fragsize)
1226                         wake_up(&u->dma.wait);
1227         }
1228         return err ? -1 : 0;
1229 }
1230
1231 /*
1232  * return value: 0 if descriptor should be restarted, -1 otherwise
1233  */
1234 static int usbout_retire_desc(struct usbout *u, struct urb *urb)
1235 {
1236         unsigned int i;
1237
1238         for (i = 0; i < DESCFRAMES; i++) {
1239                 if (urb->iso_frame_desc[i].status) {
1240                         dprintk((KERN_DEBUG "usbout_retire_desc: frame %u status %d\n", i, urb->iso_frame_desc[i].status));
1241                         continue;
1242                 }
1243         }
1244         return 0;
1245 }
1246
1247 static void usbout_completed(struct urb *urb, struct pt_regs *regs)
1248 {
1249         struct usb_audiodev *as = (struct usb_audiodev *)urb->context;
1250         struct usbout *u = &as->usbout;
1251         unsigned long flags;
1252         unsigned int mask;
1253         int suret = 0;
1254
1255 #if 0
1256         printk(KERN_DEBUG "usbout_completed: status %d errcnt %d flags 0x%x\n", urb->status, urb->error_count, u->flags);
1257 #endif
1258         if (urb == u->durb[0].urb)
1259                 mask = FLG_URB0RUNNING;
1260         else if (urb == u->durb[1].urb)
1261                 mask = FLG_URB1RUNNING;
1262         else {
1263                 mask = 0;
1264                 printk(KERN_ERR "usbout_completed: panic: unknown URB\n");
1265         }
1266         urb->dev = as->state->usbdev;
1267         spin_lock_irqsave(&as->lock, flags);
1268         if (!usbout_retire_desc(u, urb) &&
1269             u->flags & FLG_RUNNING &&
1270             !usbout_prepare_desc(u, urb) &&
1271             (suret = usb_submit_urb(urb, GFP_ATOMIC)) == 0) {
1272                 u->flags |= mask;
1273         } else {
1274                 u->flags &= ~(mask | FLG_RUNNING);
1275                 wake_up(&u->dma.wait);
1276                 dprintk((KERN_DEBUG "usbout_completed: descriptor not restarted (usb_submit_urb: %d)\n", suret));
1277         }
1278         spin_unlock_irqrestore(&as->lock, flags);
1279 }
1280
1281 static int usbout_sync_prepare_desc(struct usbout *u, struct urb *urb)
1282 {
1283         unsigned int i, offs;
1284
1285         for (i = offs = 0; i < SYNCFRAMES; i++, offs += 3) {
1286                 urb->iso_frame_desc[i].length = 3;
1287                 urb->iso_frame_desc[i].offset = offs;
1288         }
1289         urb->interval = 1;
1290         return 0;
1291 }
1292
1293 /*
1294  * return value: 0 if descriptor should be restarted, -1 otherwise
1295  */
1296 static int usbout_sync_retire_desc(struct usbout *u, struct urb *urb)
1297 {
1298         unsigned char *cp = urb->transfer_buffer;
1299         unsigned int f, i;
1300
1301         for (i = 0; i < SYNCFRAMES; i++, cp += 3) {
1302                 if (urb->iso_frame_desc[i].status) {
1303                         dprintk((KERN_DEBUG "usbout_sync_retire_desc: frame %u status %d\n", i, urb->iso_frame_desc[i].status));
1304                         continue;
1305                 }
1306                 if (urb->iso_frame_desc[i].actual_length < 3) {
1307                         dprintk((KERN_DEBUG "usbout_sync_retire_desc: frame %u length %d\n", i, urb->iso_frame_desc[i].actual_length));
1308                         continue;
1309                 }
1310                 f = cp[0] | (cp[1] << 8) | (cp[2] << 16);
1311                 if (abs(f - u->freqn) > (u->freqn >> 3) || f > u->freqmax) {
1312                         printk(KERN_WARNING "usbout_sync_retire_desc: requested frequency %u (nominal %u) out of range!\n", f, u->freqn);
1313                         continue;
1314                 }
1315                 u->freqm = f;
1316         }
1317         return 0;
1318 }
1319
1320 static void usbout_sync_completed(struct urb *urb, struct pt_regs *regs)
1321 {
1322         struct usb_audiodev *as = (struct usb_audiodev *)urb->context;
1323         struct usbout *u = &as->usbout;
1324         unsigned long flags;
1325         unsigned int mask;
1326         int suret = 0;
1327
1328 #if 0
1329         printk(KERN_DEBUG "usbout_sync_completed: status %d errcnt %d flags 0x%x\n", urb->status, urb->error_count, u->flags);
1330 #endif
1331         if (urb == u->surb[0].urb)
1332                 mask = FLG_SYNC0RUNNING;
1333         else if (urb == u->surb[1].urb)
1334                 mask = FLG_SYNC1RUNNING;
1335         else {
1336                 mask = 0;
1337                 printk(KERN_ERR "usbout_sync_completed: panic: unknown URB\n");
1338         }
1339         urb->dev = as->state->usbdev;
1340         spin_lock_irqsave(&as->lock, flags);
1341         if (!usbout_sync_retire_desc(u, urb) &&
1342             u->flags & FLG_RUNNING &&
1343             !usbout_sync_prepare_desc(u, urb) &&
1344             (suret = usb_submit_urb(urb, GFP_ATOMIC)) == 0) {
1345                 u->flags |= mask;
1346         } else {
1347                 u->flags &= ~(mask | FLG_RUNNING);
1348                 wake_up(&u->dma.wait);
1349                 dprintk((KERN_DEBUG "usbout_sync_completed: descriptor not restarted (usb_submit_urb: %d)\n", suret));
1350         }
1351         spin_unlock_irqrestore(&as->lock, flags);
1352 }
1353
1354 static int usbout_start(struct usb_audiodev *as)
1355 {
1356         struct usb_device *dev = as->state->usbdev;
1357         struct usbout *u = &as->usbout;
1358         struct urb *urb;
1359         unsigned long flags;
1360         unsigned int maxsze, bufsz;
1361
1362 #if 0
1363         printk(KERN_DEBUG "usbout_start: device %d ufmt 0x%08x dfmt 0x%08x srate %d\n",
1364                dev->devnum, u->format, u->dma.format, u->dma.srate);
1365 #endif
1366         /* allocate USB storage if not already done */
1367         spin_lock_irqsave(&as->lock, flags);
1368         if (!(u->flags & FLG_CONNECTED)) {
1369                 spin_unlock_irqrestore(&as->lock, flags);
1370                 return -EIO;
1371         }
1372         if (!(u->flags & FLG_RUNNING)) {
1373                 spin_unlock_irqrestore(&as->lock, flags);
1374                 u->freqn = u->freqm = ((u->dma.srate << 11) + 62) / 125; /* this will overflow at approx 2MSPS */
1375                 u->freqmax = u->freqn + (u->freqn >> 2);
1376                 u->phase = 0;
1377                 maxsze = (u->freqmax + 0x3fff) >> (14 - AFMT_BYTESSHIFT(u->format));
1378                 bufsz = DESCFRAMES * maxsze;
1379                 if (u->durb[0].urb->transfer_buffer)
1380                         kfree(u->durb[0].urb->transfer_buffer);
1381                 u->durb[0].urb->transfer_buffer = kmalloc(bufsz, GFP_KERNEL);
1382                 u->durb[0].urb->transfer_buffer_length = bufsz;
1383                 if (u->durb[1].urb->transfer_buffer)
1384                         kfree(u->durb[1].urb->transfer_buffer);
1385                 u->durb[1].urb->transfer_buffer = kmalloc(bufsz, GFP_KERNEL);
1386                 u->durb[1].urb->transfer_buffer_length = bufsz;
1387                 if (u->syncpipe) {
1388                         if (u->surb[0].urb->transfer_buffer)
1389                                 kfree(u->surb[0].urb->transfer_buffer);
1390                         u->surb[0].urb->transfer_buffer = kmalloc(3*SYNCFRAMES, GFP_KERNEL);
1391                         u->surb[0].urb->transfer_buffer_length = 3*SYNCFRAMES;
1392                         if (u->surb[1].urb->transfer_buffer)
1393                                 kfree(u->surb[1].urb->transfer_buffer);
1394                         u->surb[1].urb->transfer_buffer = kmalloc(3*SYNCFRAMES, GFP_KERNEL);
1395                         u->surb[1].urb->transfer_buffer_length = 3*SYNCFRAMES;
1396                 }
1397                 if (!u->durb[0].urb->transfer_buffer || !u->durb[1].urb->transfer_buffer ||
1398                     (u->syncpipe && (!u->surb[0].urb->transfer_buffer || !u->surb[1].urb->transfer_buffer))) {
1399                         printk(KERN_ERR "usbaudio: cannot start playback device %d\n", dev->devnum);
1400                         return 0;
1401                 }
1402                 spin_lock_irqsave(&as->lock, flags);
1403         }
1404         if (u->dma.count <= 0 && !u->dma.mapped) {
1405                 spin_unlock_irqrestore(&as->lock, flags);
1406                 return 0;
1407         }
1408         u->flags |= FLG_RUNNING;
1409         if (!(u->flags & FLG_URB0RUNNING)) {
1410                 urb = u->durb[0].urb;
1411                 urb->dev = dev;
1412                 urb->pipe = u->datapipe;
1413                 urb->transfer_flags = URB_ISO_ASAP;
1414                 urb->number_of_packets = DESCFRAMES;
1415                 urb->context = as;
1416                 urb->complete = usbout_completed;
1417                 if (!usbout_prepare_desc(u, urb) && !usb_submit_urb(urb, GFP_ATOMIC))
1418                         u->flags |= FLG_URB0RUNNING;
1419                 else
1420                         u->flags &= ~FLG_RUNNING;
1421         }
1422         if (u->flags & FLG_RUNNING && !(u->flags & FLG_URB1RUNNING)) {
1423                 urb = u->durb[1].urb;
1424                 urb->dev = dev;
1425                 urb->pipe = u->datapipe;
1426                 urb->transfer_flags = URB_ISO_ASAP;
1427                 urb->number_of_packets = DESCFRAMES;
1428                 urb->context = as;
1429                 urb->complete = usbout_completed;
1430                 if (!usbout_prepare_desc(u, urb) && !usb_submit_urb(urb, GFP_ATOMIC))
1431                         u->flags |= FLG_URB1RUNNING;
1432                 else
1433                         u->flags &= ~FLG_RUNNING;
1434         }
1435         if (u->syncpipe) {
1436                 if (u->flags & FLG_RUNNING && !(u->flags & FLG_SYNC0RUNNING)) {
1437                         urb = u->surb[0].urb;
1438                         urb->dev = dev;
1439                         urb->pipe = u->syncpipe;
1440                         urb->transfer_flags = URB_ISO_ASAP;
1441                         urb->number_of_packets = SYNCFRAMES;
1442                         urb->context = as;
1443                         urb->complete = usbout_sync_completed;
1444                         /* stride: u->syncinterval */
1445                         if (!usbout_sync_prepare_desc(u, urb) && !usb_submit_urb(urb, GFP_ATOMIC))
1446                                 u->flags |= FLG_SYNC0RUNNING;
1447                         else
1448                                 u->flags &= ~FLG_RUNNING;
1449                 }
1450                 if (u->flags & FLG_RUNNING && !(u->flags & FLG_SYNC1RUNNING)) {
1451                         urb = u->surb[1].urb;
1452                         urb->dev = dev;
1453                         urb->pipe = u->syncpipe;
1454                         urb->transfer_flags = URB_ISO_ASAP;
1455                         urb->number_of_packets = SYNCFRAMES;
1456                         urb->context = as;
1457                         urb->complete = usbout_sync_completed;
1458                         /* stride: u->syncinterval */
1459                         if (!usbout_sync_prepare_desc(u, urb) && !usb_submit_urb(urb, GFP_ATOMIC))
1460                                 u->flags |= FLG_SYNC1RUNNING;
1461                         else
1462                                 u->flags &= ~FLG_RUNNING;
1463                 }
1464         }
1465         spin_unlock_irqrestore(&as->lock, flags);
1466         return 0;
1467 }
1468
1469 /* --------------------------------------------------------------------- */
1470
1471 static unsigned int format_goodness(struct audioformat *afp, unsigned int fmt, unsigned int srate)
1472 {
1473         unsigned int g = 0;
1474
1475         if (srate < afp->sratelo)
1476                 g += afp->sratelo - srate;
1477         if (srate > afp->sratehi)
1478                 g += srate - afp->sratehi;
1479         if (AFMT_ISSTEREO(afp->format) && !AFMT_ISSTEREO(fmt))
1480                 g += 0x100000;
1481         if (!AFMT_ISSTEREO(afp->format) && AFMT_ISSTEREO(fmt))
1482                 g += 0x400000;
1483         if (AFMT_IS16BIT(afp->format) && !AFMT_IS16BIT(fmt))
1484                 g += 0x100000;
1485         if (!AFMT_IS16BIT(afp->format) && AFMT_IS16BIT(fmt))
1486                 g += 0x400000;
1487         return g;
1488 }
1489
1490 static int find_format(struct audioformat *afp, unsigned int nr, unsigned int fmt, unsigned int srate)
1491 {
1492         unsigned int i, g, gb = ~0;
1493         int j = -1; /* default to failure */
1494
1495         /* find "best" format (according to format_goodness) */
1496         for (i = 0; i < nr; i++) {
1497                 g = format_goodness(&afp[i], fmt, srate);
1498                 if (g >= gb)
1499                         continue;
1500                 j = i;
1501                 gb = g;
1502         }
1503         return j;
1504 }
1505
1506 static int set_format_in(struct usb_audiodev *as)
1507 {
1508         struct usb_device *dev = as->state->usbdev;
1509         struct usb_host_interface *alts;
1510         struct usb_interface *iface;
1511         struct usbin *u = &as->usbin;
1512         struct dmabuf *d = &u->dma;
1513         struct audioformat *fmt;
1514         unsigned int ep;
1515         unsigned char data[3];
1516         int fmtnr, ret;
1517
1518         iface = usb_ifnum_to_if(dev, u->interface);
1519         if (!iface)
1520                 return 0;
1521
1522         fmtnr = find_format(as->fmtin, as->numfmtin, d->format, d->srate);
1523         if (fmtnr < 0) {
1524                 printk(KERN_ERR "usbaudio: set_format_in(): failed to find desired format/speed combination.\n");
1525                 return -1;
1526         }
1527
1528         fmt = as->fmtin + fmtnr;
1529         alts = usb_altnum_to_altsetting(iface, fmt->altsetting);
1530         u->format = fmt->format;
1531         u->datapipe = usb_rcvisocpipe(dev, alts->endpoint[0].desc.bEndpointAddress & 0xf);
1532         u->syncpipe = u->syncinterval = 0;
1533         if ((alts->endpoint[0].desc.bmAttributes & 0x0c) == 0x08) {
1534                 if (alts->desc.bNumEndpoints < 2 ||
1535                     alts->endpoint[1].desc.bmAttributes != 0x01 ||
1536                     alts->endpoint[1].desc.bSynchAddress != 0 ||
1537                     alts->endpoint[1].desc.bEndpointAddress != (alts->endpoint[0].desc.bSynchAddress & 0x7f)) {
1538                         printk(KERN_WARNING "usbaudio: device %d interface %d altsetting %d claims adaptive in "
1539                                "but has invalid synch pipe; treating as asynchronous in\n",
1540                                dev->devnum, u->interface, fmt->altsetting);
1541                 } else {
1542                         u->syncpipe = usb_sndisocpipe(dev, alts->endpoint[1].desc.bEndpointAddress & 0xf);
1543                         u->syncinterval = alts->endpoint[1].desc.bRefresh;
1544                 }
1545         }
1546         if (d->srate < fmt->sratelo)
1547                 d->srate = fmt->sratelo;
1548         if (d->srate > fmt->sratehi)
1549                 d->srate = fmt->sratehi;
1550         dprintk((KERN_DEBUG "usbaudio: set_format_in: usb_set_interface %u %u\n",
1551                         u->interface, fmt->altsetting));
1552         if (usb_set_interface(dev, alts->desc.bInterfaceNumber, fmt->altsetting) < 0) {
1553                 printk(KERN_WARNING "usbaudio: usb_set_interface failed, device %d interface %d altsetting %d\n",
1554                        dev->devnum, u->interface, fmt->altsetting);
1555                 return -1;
1556         }
1557         if (fmt->sratelo == fmt->sratehi)
1558                 return 0;
1559         ep = usb_pipeendpoint(u->datapipe) | (u->datapipe & USB_DIR_IN);
1560         /* if endpoint has pitch control, enable it */
1561         if (fmt->attributes & 0x02) {
1562                 data[0] = 1;
1563                 if ((ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
1564                                            PITCH_CONTROL << 8, ep, data, 1, 1000)) < 0) {
1565                         printk(KERN_ERR "usbaudio: failure (error %d) to set output pitch control device %d interface %u endpoint 0x%x to %u\n",
1566                                ret, dev->devnum, u->interface, ep, d->srate);
1567                         return -1;
1568                 }
1569         }
1570         /* if endpoint has sampling rate control, set it */
1571         if (fmt->attributes & 0x01) {
1572                 data[0] = d->srate;
1573                 data[1] = d->srate >> 8;
1574                 data[2] = d->srate >> 16;
1575                 if ((ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
1576                                            SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) {
1577                         printk(KERN_ERR "usbaudio: failure (error %d) to set input sampling frequency device %d interface %u endpoint 0x%x to %u\n",
1578                                ret, dev->devnum, u->interface, ep, d->srate);
1579                         return -1;
1580                 }
1581                 if ((ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_IN,
1582                                            SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) {
1583                         printk(KERN_ERR "usbaudio: failure (error %d) to get input sampling frequency device %d interface %u endpoint 0x%x\n",
1584                                ret, dev->devnum, u->interface, ep);
1585                         return -1;
1586                 }
1587                 dprintk((KERN_DEBUG "usbaudio: set_format_in: device %d interface %d altsetting %d srate req: %u real %u\n",
1588                         dev->devnum, u->interface, fmt->altsetting, d->srate, data[0] | (data[1] << 8) | (data[2] << 16)));
1589                 d->srate = data[0] | (data[1] << 8) | (data[2] << 16);
1590         }
1591         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         return 0;
1593 }
1594
1595 static int set_format_out(struct usb_audiodev *as)
1596 {
1597         struct usb_device *dev = as->state->usbdev;
1598         struct usb_host_interface *alts;
1599         struct usb_interface *iface;
1600         struct usbout *u = &as->usbout;
1601         struct dmabuf *d = &u->dma;
1602         struct audioformat *fmt;
1603         unsigned int ep;
1604         unsigned char data[3];
1605         int fmtnr, ret;
1606
1607         iface = usb_ifnum_to_if(dev, u->interface);
1608         if (!iface)
1609                 return 0;
1610
1611         fmtnr = find_format(as->fmtout, as->numfmtout, d->format, d->srate);
1612         if (fmtnr < 0) {
1613                 printk(KERN_ERR "usbaudio: set_format_out(): failed to find desired format/speed combination.\n");
1614                 return -1;
1615         }
1616
1617         fmt = as->fmtout + fmtnr;
1618         u->format = fmt->format;
1619         alts = usb_altnum_to_altsetting(iface, fmt->altsetting);
1620         u->datapipe = usb_sndisocpipe(dev, alts->endpoint[0].desc.bEndpointAddress & 0xf);
1621         u->syncpipe = u->syncinterval = 0;
1622         if ((alts->endpoint[0].desc.bmAttributes & 0x0c) == 0x04) {
1623 #if 0
1624                 printk(KERN_DEBUG "bNumEndpoints 0x%02x endpoint[1].bmAttributes 0x%02x\n"
1625                        KERN_DEBUG "endpoint[1].bSynchAddress 0x%02x endpoint[1].bEndpointAddress 0x%02x\n"
1626                        KERN_DEBUG "endpoint[0].bSynchAddress 0x%02x\n", alts->bNumEndpoints,
1627                        alts->endpoint[1].bmAttributes, alts->endpoint[1].bSynchAddress,
1628                        alts->endpoint[1].bEndpointAddress, alts->endpoint[0].bSynchAddress);
1629 #endif
1630                 if (alts->desc.bNumEndpoints < 2 ||
1631                     alts->endpoint[1].desc.bmAttributes != 0x01 ||
1632                     alts->endpoint[1].desc.bSynchAddress != 0 ||
1633                     alts->endpoint[1].desc.bEndpointAddress != (alts->endpoint[0].desc.bSynchAddress | 0x80)) {
1634                         printk(KERN_WARNING "usbaudio: device %d interface %d altsetting %d claims asynch out "
1635                                "but has invalid synch pipe; treating as adaptive out\n",
1636                                dev->devnum, u->interface, fmt->altsetting);
1637                 } else {
1638                         u->syncpipe = usb_rcvisocpipe(dev, alts->endpoint[1].desc.bEndpointAddress & 0xf);
1639                         u->syncinterval = alts->endpoint[1].desc.bRefresh;
1640                 }
1641         }
1642         if (d->srate < fmt->sratelo)
1643                 d->srate = fmt->sratelo;
1644         if (d->srate > fmt->sratehi)
1645                 d->srate = fmt->sratehi;
1646         dprintk((KERN_DEBUG "usbaudio: set_format_out: usb_set_interface %u %u\n",
1647                         u->interface, fmt->altsetting));
1648         if (usb_set_interface(dev, u->interface, fmt->altsetting) < 0) {
1649                 printk(KERN_WARNING "usbaudio: usb_set_interface failed, device %d interface %d altsetting %d\n",
1650                        dev->devnum, u->interface, fmt->altsetting);
1651                 return -1;
1652         }
1653         if (fmt->sratelo == fmt->sratehi)
1654                 return 0;
1655         ep = usb_pipeendpoint(u->datapipe) | (u->datapipe & USB_DIR_IN);
1656         /* if endpoint has pitch control, enable it */
1657         if (fmt->attributes & 0x02) {
1658                 data[0] = 1;
1659                 if ((ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
1660                                            PITCH_CONTROL << 8, ep, data, 1, 1000)) < 0) {
1661                         printk(KERN_ERR "usbaudio: failure (error %d) to set output pitch control device %d interface %u endpoint 0x%x to %u\n",
1662                                ret, dev->devnum, u->interface, ep, d->srate);
1663                         return -1;
1664                 }
1665         }
1666         /* if endpoint has sampling rate control, set it */
1667         if (fmt->attributes & 0x01) {
1668                 data[0] = d->srate;
1669                 data[1] = d->srate >> 8;
1670                 data[2] = d->srate >> 16;
1671                 if ((ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
1672                                            SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) {
1673                         printk(KERN_ERR "usbaudio: failure (error %d) to set output sampling frequency device %d interface %u endpoint 0x%x to %u\n",
1674                                ret, dev->devnum, u->interface, ep, d->srate);
1675                         return -1;
1676                 }
1677                 if ((ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_IN,
1678                                            SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) {
1679                         printk(KERN_ERR "usbaudio: failure (error %d) to get output sampling frequency device %d interface %u endpoint 0x%x\n",
1680                                ret, dev->devnum, u->interface, ep);
1681                         return -1;
1682                 }
1683                 dprintk((KERN_DEBUG "usbaudio: set_format_out: device %d interface %d altsetting %d srate req: %u real %u\n",
1684                         dev->devnum, u->interface, fmt->altsetting, d->srate, data[0] | (data[1] << 8) | (data[2] << 16)));
1685                 d->srate = data[0] | (data[1] << 8) | (data[2] << 16);
1686         }
1687         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         return 0;
1689 }
1690
1691 static int set_format(struct usb_audiodev *s, unsigned int fmode, unsigned int fmt, unsigned int srate)
1692 {
1693         int ret1 = 0, ret2 = 0;
1694
1695         if (!(fmode & (FMODE_READ|FMODE_WRITE)))
1696                 return -EINVAL;
1697         if (fmode & FMODE_READ) {
1698                 usbin_stop(s);
1699                 s->usbin.dma.ready = 0;
1700                 if (fmt == AFMT_QUERY)
1701                         fmt = s->usbin.dma.format;
1702                 else
1703                         s->usbin.dma.format = fmt;
1704                 if (!srate)
1705                         srate = s->usbin.dma.srate;
1706                 else
1707                         s->usbin.dma.srate = srate;
1708         }
1709         if (fmode & FMODE_WRITE) {
1710                 usbout_stop(s);
1711                 s->usbout.dma.ready = 0;
1712                 if (fmt == AFMT_QUERY)
1713                         fmt = s->usbout.dma.format;
1714                 else
1715                         s->usbout.dma.format = fmt;
1716                 if (!srate)
1717                         srate = s->usbout.dma.srate;
1718                 else
1719                         s->usbout.dma.srate = srate;
1720         }
1721         if (fmode & FMODE_READ)
1722                 ret1 = set_format_in(s);
1723         if (fmode & FMODE_WRITE)
1724                 ret2 = set_format_out(s);
1725         return ret1 ? ret1 : ret2;
1726 }
1727
1728 /* --------------------------------------------------------------------- */
1729
1730 static int wrmixer(struct usb_mixerdev *ms, unsigned mixch, unsigned value)
1731 {
1732         struct usb_device *dev = ms->state->usbdev;
1733         unsigned char data[2];
1734         struct mixerchannel *ch;
1735         int v1, v2, v3;
1736
1737         if (mixch >= ms->numch)
1738                 return -1;
1739         ch = &ms->ch[mixch];
1740         v3 = ch->maxval - ch->minval;
1741         v1 = value & 0xff;
1742         v2 = (value >> 8) & 0xff;
1743         if (v1 > 100)
1744                 v1 = 100;
1745         if (v2 > 100)
1746                 v2 = 100;
1747         if (!(ch->flags & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT)))
1748                 v2 = v1;
1749         ch->value = v1 | (v2 << 8);
1750         v1 = (v1 * v3) / 100 + ch->minval;
1751         v2 = (v2 * v3) / 100 + ch->minval;
1752         switch (ch->selector) {
1753         case 0:  /* mixer unit request */
1754                 data[0] = v1;
1755                 data[1] = v1 >> 8;
1756                 if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
1757                                     (ch->chnum << 8) | 1, ms->iface | (ch->unitid << 8), data, 2, 1000) < 0)
1758                         goto err;
1759                 if (!(ch->flags & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT)))
1760                         return 0;
1761                 data[0] = v2;
1762                 data[1] = v2 >> 8;
1763                 if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
1764                                     ((ch->chnum + !!(ch->flags & MIXFLG_STEREOIN)) << 8) | (1 + !!(ch->flags & MIXFLG_STEREOOUT)),
1765                                     ms->iface | (ch->unitid << 8), data, 2, 1000) < 0)
1766                         goto err;
1767                 return 0;
1768
1769                 /* various feature unit controls */
1770         case VOLUME_CONTROL:
1771                 data[0] = v1;
1772                 data[1] = v1 >> 8;
1773                 if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
1774                                     (ch->selector << 8) | ch->chnum, ms->iface | (ch->unitid << 8), data, 2, 1000) < 0)
1775                         goto err;
1776                 if (!(ch->flags & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT)))
1777                         return 0;
1778                 data[0] = v2;
1779                 data[1] = v2 >> 8;
1780                 if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
1781                                     (ch->selector << 8) | (ch->chnum + 1), ms->iface | (ch->unitid << 8), data, 2, 1000) < 0)
1782                         goto err;
1783                 return 0;
1784
1785         case BASS_CONTROL:
1786         case MID_CONTROL:
1787         case TREBLE_CONTROL:
1788                 data[0] = v1 >> 8;
1789                 if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
1790                                     (ch->selector << 8) | ch->chnum, ms->iface | (ch->unitid << 8), data, 1, 1000) < 0)
1791                         goto err;
1792                 if (!(ch->flags & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT)))
1793                         return 0;
1794                 data[0] = v2 >> 8;
1795                 if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
1796                                     (ch->selector << 8) | (ch->chnum + 1), ms->iface | (ch->unitid << 8), data, 1, 1000) < 0)
1797                         goto err;
1798                 return 0;
1799
1800         default:
1801                 return -1;
1802         }
1803         return 0;
1804
1805  err:
1806         printk(KERN_ERR "usbaudio: mixer request device %u if %u unit %u ch %u selector %u failed\n",
1807                 dev->devnum, ms->iface, ch->unitid, ch->chnum, ch->selector);
1808         return -1;
1809 }
1810
1811 static int get_rec_src(struct usb_mixerdev *ms)
1812 {
1813         struct usb_device *dev = ms->state->usbdev;
1814         unsigned int mask = 0, retmask = 0;
1815         unsigned int i, j;
1816         unsigned char buf;
1817         int err = 0;
1818
1819         for (i = 0; i < ms->numch; i++) {
1820                 if (!ms->ch[i].slctunitid || (mask & (1 << i)))
1821                         continue;
1822                 if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
1823                                     0, ms->iface | (ms->ch[i].slctunitid << 8), &buf, 1, 1000) < 0) {
1824                         err = -EIO;
1825                         printk(KERN_ERR "usbaudio: selector read request device %u if %u unit %u failed\n",
1826                                dev->devnum, ms->iface, ms->ch[i].slctunitid & 0xff);
1827                         continue;
1828                 }
1829                 for (j = i; j < ms->numch; j++) {
1830                         if ((ms->ch[i].slctunitid ^ ms->ch[j].slctunitid) & 0xff)
1831                                 continue;
1832                         mask |= 1 << j;
1833                         if (buf == (ms->ch[j].slctunitid >> 8))
1834                                 retmask |= 1 << ms->ch[j].osschannel;
1835                 }
1836         }
1837         if (err)
1838                 return -EIO;
1839         return retmask;
1840 }
1841
1842 static int set_rec_src(struct usb_mixerdev *ms, int srcmask)
1843 {
1844         struct usb_device *dev = ms->state->usbdev;
1845         unsigned int mask = 0, smask, bmask;
1846         unsigned int i, j;
1847         unsigned char buf;
1848         int err = 0;
1849
1850         for (i = 0; i < ms->numch; i++) {
1851                 if (!ms->ch[i].slctunitid || (mask & (1 << i)))
1852                         continue;
1853                 if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
1854                                     0, ms->iface | (ms->ch[i].slctunitid << 8), &buf, 1, 1000) < 0) {
1855                         err = -EIO;
1856                         printk(KERN_ERR "usbaudio: selector read request device %u if %u unit %u failed\n",
1857                                dev->devnum, ms->iface, ms->ch[i].slctunitid & 0xff);
1858                         continue;
1859                 }
1860                 /* first generate smask */
1861                 smask = bmask = 0;
1862                 for (j = i; j < ms->numch; j++) {
1863                         if ((ms->ch[i].slctunitid ^ ms->ch[j].slctunitid) & 0xff)
1864                                 continue;
1865                         smask |= 1 << ms->ch[j].osschannel;
1866                         if (buf == (ms->ch[j].slctunitid >> 8))
1867                                 bmask |= 1 << ms->ch[j].osschannel;
1868                         mask |= 1 << j;
1869                 }
1870                 /* check for multiple set sources */
1871                 j = hweight32(srcmask & smask);
1872                 if (j == 0)
1873                         continue;
1874                 if (j > 1)
1875                         srcmask &= ~bmask;
1876                 for (j = i; j < ms->numch; j++) {
1877                         if ((ms->ch[i].slctunitid ^ ms->ch[j].slctunitid) & 0xff)
1878                                 continue;
1879                         if (!(srcmask & (1 << ms->ch[j].osschannel)))
1880                                 continue;
1881                         buf = ms->ch[j].slctunitid >> 8;
1882                         if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
1883                                     0, ms->iface | (ms->ch[j].slctunitid << 8), &buf, 1, 1000) < 0) {
1884                                 err = -EIO;
1885                                 printk(KERN_ERR "usbaudio: selector write request device %u if %u unit %u failed\n",
1886                                        dev->devnum, ms->iface, ms->ch[j].slctunitid & 0xff);
1887                                 continue;
1888                         }
1889                 }
1890         }
1891         return err ? -EIO : 0;
1892 }
1893
1894 /* --------------------------------------------------------------------- */
1895
1896 /*
1897  * should be called with open_sem hold, so that no new processes
1898  * look at the audio device to be destroyed
1899  */
1900
1901 static void release(struct usb_audio_state *s)
1902 {
1903         struct usb_audiodev *as;
1904         struct usb_mixerdev *ms;
1905
1906         s->count--;
1907         if (s->count) {
1908                 up(&open_sem);
1909                 return;
1910         }
1911         up(&open_sem);
1912         wake_up(&open_wait);
1913         while (!list_empty(&s->audiolist)) {
1914                 as = list_entry(s->audiolist.next, struct usb_audiodev, list);
1915                 list_del(&as->list);
1916                 usbin_release(as);
1917                 usbout_release(as);
1918                 dmabuf_release(&as->usbin.dma);
1919                 dmabuf_release(&as->usbout.dma);
1920                 usb_free_urb(as->usbin.durb[0].urb);
1921                 usb_free_urb(as->usbin.durb[1].urb);
1922                 usb_free_urb(as->usbin.surb[0].urb);
1923                 usb_free_urb(as->usbin.surb[1].urb);
1924                 usb_free_urb(as->usbout.durb[0].urb);
1925                 usb_free_urb(as->usbout.durb[1].urb);
1926                 usb_free_urb(as->usbout.surb[0].urb);
1927                 usb_free_urb(as->usbout.surb[1].urb);
1928                 kfree(as);
1929         }
1930         while (!list_empty(&s->mixerlist)) {
1931                 ms = list_entry(s->mixerlist.next, struct usb_mixerdev, list);
1932                 list_del(&ms->list);
1933                 kfree(ms);
1934         }
1935         kfree(s);
1936 }
1937
1938 static inline int prog_dmabuf_in(struct usb_audiodev *as)
1939 {
1940         usbin_stop(as);
1941         return dmabuf_init(&as->usbin.dma);
1942 }
1943
1944 static inline int prog_dmabuf_out(struct usb_audiodev *as)
1945 {
1946         usbout_stop(as);
1947         return dmabuf_init(&as->usbout.dma);
1948 }
1949
1950 /* --------------------------------------------------------------------- */
1951
1952 static int usb_audio_open_mixdev(struct inode *inode, struct file *file)
1953 {
1954         unsigned int minor = iminor(inode);
1955         struct usb_mixerdev *ms;
1956         struct usb_audio_state *s;
1957
1958         down(&open_sem);
1959         list_for_each_entry(s, &audiodevs, audiodev) {
1960                 list_for_each_entry(ms, &s->mixerlist, list) {
1961                         if (ms->dev_mixer == minor)
1962                                 goto mixer_found;
1963                 }
1964         }
1965         up(&open_sem);
1966         return -ENODEV;
1967
1968  mixer_found:
1969         if (!s->usbdev) {
1970                 up(&open_sem);
1971                 return -EIO;
1972         }
1973         file->private_data = ms;
1974         s->count++;
1975
1976         up(&open_sem);
1977         return nonseekable_open(inode, file);
1978 }
1979
1980 static int usb_audio_release_mixdev(struct inode *inode, struct file *file)
1981 {
1982         struct usb_mixerdev *ms = (struct usb_mixerdev *)file->private_data;
1983         struct usb_audio_state *s;
1984
1985         lock_kernel();
1986         s = ms->state;
1987         down(&open_sem);
1988         release(s);
1989         unlock_kernel();
1990         return 0;
1991 }
1992
1993 static int usb_audio_ioctl_mixdev(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
1994 {
1995         struct usb_mixerdev *ms = (struct usb_mixerdev *)file->private_data;
1996         int i, j, val;
1997         int __user *user_arg = (int __user *)arg;
1998
1999         if (!ms->state->usbdev)
2000                 return -ENODEV;
2001
2002         if (cmd == SOUND_MIXER_INFO) {
2003                 mixer_info info;
2004
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)))
2010                         return -EFAULT;
2011                 return 0;
2012         }
2013         if (cmd == SOUND_OLD_MIXER_INFO) {
2014                 _old_mixer_info info;
2015
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)))
2020                         return -EFAULT;
2021                 return 0;
2022         }
2023         if (cmd == OSS_GETVERSION)
2024                 return put_user(SOUND_VERSION, user_arg);
2025         if (_IOC_TYPE(cmd) != 'M' || _IOC_SIZE(cmd) != sizeof(int))
2026                 return -EINVAL;
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);
2031                         if (val < 0)
2032                                 return val;
2033                         return put_user(val, user_arg);
2034
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);
2039
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);
2045
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);
2051
2052                 case SOUND_MIXER_CAPS:
2053                         return put_user(SOUND_CAP_EXCL_INPUT, user_arg);
2054
2055                 default:
2056                         i = _IOC_NR(cmd);
2057                         if (i >= SOUND_MIXER_NRDEVICES)
2058                                 return -EINVAL;
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);
2062                                 }
2063                         }
2064                         return -EINVAL;
2065                 }
2066         }
2067         if (_IOC_DIR(cmd) != (_IOC_READ|_IOC_WRITE))
2068                 return -EINVAL;
2069         ms->modcnt++;
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))
2073                         return -EFAULT;
2074                 return set_rec_src(ms, val);
2075
2076         default:
2077                 i = _IOC_NR(cmd);
2078                 if (i >= SOUND_MIXER_NRDEVICES)
2079                         return -EINVAL;
2080                 for (j = 0; j < ms->numch && ms->ch[j].osschannel != i; j++);
2081                 if (j >= ms->numch)
2082                         return -EINVAL;
2083                 if (get_user(val, user_arg))
2084                         return -EFAULT;
2085                 if (wrmixer(ms, j, val))
2086                         return -EIO;
2087                 return put_user(ms->ch[j].value, user_arg);
2088         }
2089 }
2090
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,
2097 };
2098
2099 /* --------------------------------------------------------------------- */
2100
2101 static int drain_out(struct usb_audiodev *as, int nonblock)
2102 {
2103         DECLARE_WAITQUEUE(wait, current);
2104         unsigned long flags;
2105         int count, tmo;
2106
2107         if (as->usbout.dma.mapped || !as->usbout.dma.ready)
2108                 return 0;
2109         usbout_start(as);
2110         add_wait_queue(&as->usbout.dma.wait, &wait);
2111         for (;;) {
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);
2116                 if (count <= 0)
2117                         break;
2118                 if (signal_pending(current))
2119                         break;
2120                 if (nonblock) {
2121                         remove_wait_queue(&as->usbout.dma.wait, &wait);
2122                         set_current_state(TASK_RUNNING);
2123                         return -EBUSY;
2124                 }
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");
2129                         break;
2130                 }
2131         }
2132         remove_wait_queue(&as->usbout.dma.wait, &wait);
2133         set_current_state(TASK_RUNNING);
2134         if (signal_pending(current))
2135                 return -ERESTARTSYS;
2136         return 0;
2137 }
2138
2139 /* --------------------------------------------------------------------- */
2140
2141 static ssize_t usb_audio_read(struct file *file, char __user *buffer, size_t count, loff_t *ppos)
2142 {
2143         struct usb_audiodev *as = (struct usb_audiodev *)file->private_data;
2144         DECLARE_WAITQUEUE(wait, current);
2145         ssize_t ret = 0;
2146         unsigned long flags;
2147         unsigned int ptr;
2148         int cnt, err;
2149
2150         if (as->usbin.dma.mapped)
2151                 return -ENXIO;
2152         if (!as->usbin.dma.ready && (ret = prog_dmabuf_in(as)))
2153                 return ret;
2154         if (!access_ok(VERIFY_WRITE, buffer, count))
2155                 return -EFAULT;
2156         add_wait_queue(&as->usbin.dma.wait, &wait);
2157         while (count > 0) {
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 */
2162                 if (cnt <= 0)
2163                         __set_current_state(TASK_INTERRUPTIBLE);
2164                 spin_unlock_irqrestore(&as->lock, flags);
2165                 if (cnt > count)
2166                         cnt = count;
2167                 if (cnt <= 0) {
2168                         if (usbin_start(as)) {
2169                                 if (!ret)
2170                                         ret = -ENODEV;
2171                                 break;
2172                         }
2173                         if (file->f_flags & O_NONBLOCK) {
2174                                 if (!ret)
2175                                         ret = -EAGAIN;
2176                                 break;
2177                         }
2178                         schedule();
2179                         if (signal_pending(current)) {
2180                                 if (!ret)
2181                                         ret = -ERESTARTSYS;
2182                                 break;
2183                         }
2184                         continue;
2185                 }
2186                 if ((err = dmabuf_copyout_user(&as->usbin.dma, ptr, buffer, cnt))) {
2187                         if (!ret)
2188                                 ret = err;
2189                         break;
2190                 }
2191                 ptr += 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);
2198                 count -= cnt;
2199                 buffer += cnt;
2200                 ret += cnt;
2201         }
2202         __set_current_state(TASK_RUNNING);
2203         remove_wait_queue(&as->usbin.dma.wait, &wait);
2204         return ret;
2205 }
2206
2207 static ssize_t usb_audio_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos)
2208 {
2209         struct usb_audiodev *as = (struct usb_audiodev *)file->private_data;
2210         DECLARE_WAITQUEUE(wait, current);
2211         ssize_t ret = 0;
2212         unsigned long flags;
2213         unsigned int ptr;
2214         unsigned int start_thr;
2215         int cnt, err;
2216
2217         if (as->usbout.dma.mapped)
2218                 return -ENXIO;
2219         if (!as->usbout.dma.ready && (ret = prog_dmabuf_out(as)))
2220                 return ret;
2221         if (!access_ok(VERIFY_READ, buffer, count))
2222                 return -EFAULT;
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);
2225         while (count > 0) {
2226 #if 0
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);
2230 #endif
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;
2235                 }
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 */
2239                 if (cnt <= 0)
2240                         __set_current_state(TASK_INTERRUPTIBLE);
2241                 spin_unlock_irqrestore(&as->lock, flags);
2242                 if (cnt > count)
2243                         cnt = count;
2244                 if (cnt <= 0) {
2245                         if (usbout_start(as)) {
2246                                 if (!ret)
2247                                         ret = -ENODEV;
2248                                 break;
2249                         }
2250                         if (file->f_flags & O_NONBLOCK) {
2251                                 if (!ret)
2252                                         ret = -EAGAIN;
2253                                 break;
2254                         }
2255                         schedule();
2256                         if (signal_pending(current)) {
2257                                 if (!ret)
2258                                         ret = -ERESTARTSYS;
2259                                 break;
2260                         }
2261                         continue;
2262                 }
2263                 if ((err = dmabuf_copyin_user(&as->usbout.dma, ptr, buffer, cnt))) {
2264                         if (!ret)
2265                                 ret = err;
2266                         break;
2267                 }
2268                 ptr += 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);
2275                 count -= cnt;
2276                 buffer += cnt;
2277                 ret += cnt;
2278                 if (as->usbout.dma.count >= start_thr && usbout_start(as)) {
2279                         if (!ret)
2280                                 ret = -ENODEV;
2281                         break;
2282                 }
2283         }
2284         __set_current_state(TASK_RUNNING);
2285         remove_wait_queue(&as->usbout.dma.wait, &wait);
2286         return ret;
2287 }
2288
2289 /* Called without the kernel lock - fine */
2290 static unsigned int usb_audio_poll(struct file *file, struct poll_table_struct *wait)
2291 {
2292         struct usb_audiodev *as = (struct usb_audiodev *)file->private_data;
2293         unsigned long flags;
2294         unsigned int mask = 0;
2295
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);
2300         }
2301         if (file->f_mode & FMODE_READ) {
2302                 if (!as->usbin.dma.ready)
2303                         prog_dmabuf_in(as);
2304                 poll_wait(file, &as->usbin.dma.wait, wait);
2305         }
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;
2310         }
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;
2315                 } else {
2316                         if ((signed)as->usbout.dma.dmasize >= as->usbout.dma.count + (signed)as->usbout.dma.fragsize)
2317                                 mask |= POLLOUT | POLLWRNORM;
2318                 }
2319         }
2320         spin_unlock_irqrestore(&as->lock, flags);
2321         return mask;
2322 }
2323
2324 static int usb_audio_mmap(struct file *file, struct vm_area_struct *vma)
2325 {
2326         struct usb_audiodev *as = (struct usb_audiodev *)file->private_data;
2327         struct dmabuf *db;
2328         int ret = -EINVAL;
2329
2330         lock_kernel();
2331         if (vma->vm_flags & VM_WRITE) {
2332                 if ((ret = prog_dmabuf_out(as)) != 0)
2333                         goto out;
2334                 db = &as->usbout.dma;
2335         } else if (vma->vm_flags & VM_READ) {
2336                 if ((ret = prog_dmabuf_in(as)) != 0)
2337                         goto out;
2338                 db = &as->usbin.dma;
2339         } else
2340                 goto out;
2341
2342         ret = -EINVAL;
2343         if (vma->vm_pgoff != 0)
2344                 goto out;
2345
2346         ret = dmabuf_mmap(vma, db,  vma->vm_start, vma->vm_end - vma->vm_start, vma->vm_page_prot);
2347 out:
2348         unlock_kernel();
2349         return ret;
2350 }
2351
2352 static int usb_audio_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
2353 {
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;
2359         count_info cinfo;
2360         int val = 0;
2361         int val2, mapped, ret;
2362
2363         if (!s->usbdev)
2364                 return -EIO;
2365         mapped = ((file->f_mode & FMODE_WRITE) && as->usbout.dma.mapped) ||
2366                 ((file->f_mode & FMODE_READ) && as->usbin.dma.mapped);
2367 #if 0
2368         if (arg)
2369                 get_user(val, (int *)arg);
2370         printk(KERN_DEBUG "usbaudio: usb_audio_ioctl cmd=%x arg=%lx *arg=%d\n", cmd, arg, val)
2371 #endif
2372         switch (cmd) {
2373         case OSS_GETVERSION:
2374                 return put_user(SOUND_VERSION, user_arg);
2375
2376         case SNDCTL_DSP_SYNC:
2377                 if (file->f_mode & FMODE_WRITE)
2378                         return drain_out(as, 0/*file->f_flags & O_NONBLOCK*/);
2379                 return 0;
2380
2381         case SNDCTL_DSP_SETDUPLEX:
2382                 return 0;
2383
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);
2387
2388         case SNDCTL_DSP_RESET:
2389                 if (file->f_mode & FMODE_WRITE) {
2390                         usbout_stop(as);
2391                         as->usbout.dma.rdptr = as->usbout.dma.wrptr = as->usbout.dma.count = as->usbout.dma.total_bytes = 0;
2392                 }
2393                 if (file->f_mode & FMODE_READ) {
2394                         usbin_stop(as);
2395                         as->usbin.dma.rdptr = as->usbin.dma.wrptr = as->usbin.dma.count = as->usbin.dma.total_bytes = 0;
2396                 }
2397                 return 0;
2398
2399         case SNDCTL_DSP_SPEED:
2400                 if (get_user(val, user_arg))
2401                         return -EFAULT;
2402                 if (val >= 0) {
2403                         if (val < 4000)
2404                                 val = 4000;
2405                         if (val > 100000)
2406                                 val = 100000;
2407                         if (set_format(as, file->f_mode, AFMT_QUERY, val))
2408                                 return -EIO;
2409                 }
2410                 return put_user((file->f_mode & FMODE_READ) ?
2411                                 as->usbin.dma.srate : as->usbout.dma.srate,
2412                                 user_arg);
2413
2414         case SNDCTL_DSP_STEREO:
2415                 if (get_user(val, user_arg))
2416                         return -EFAULT;
2417                 val2 = (file->f_mode & FMODE_READ) ? as->usbin.dma.format : as->usbout.dma.format;
2418                 if (val)
2419                         val2 |= AFMT_STEREO;
2420                 else
2421                         val2 &= ~AFMT_STEREO;
2422                 if (set_format(as, file->f_mode, val2, 0))
2423                         return -EIO;
2424                 return 0;
2425
2426         case SNDCTL_DSP_CHANNELS:
2427                 if (get_user(val, user_arg))
2428                         return -EFAULT;
2429                 if (val != 0) {
2430                         val2 = (file->f_mode & FMODE_READ) ? as->usbin.dma.format : as->usbout.dma.format;
2431                         if (val == 1)
2432                                 val2 &= ~AFMT_STEREO;
2433                         else
2434                                 val2 |= AFMT_STEREO;
2435                         if (set_format(as, file->f_mode, val2, 0))
2436                                 return -EIO;
2437                 }
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);
2440
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);
2444
2445         case SNDCTL_DSP_SETFMT: /* Selects ONE fmt*/
2446                 if (get_user(val, user_arg))
2447                         return -EFAULT;
2448                 if (val != AFMT_QUERY) {
2449                         if (hweight32(val) != 1)
2450                                 return -EINVAL;
2451                         if (!(val & (AFMT_U8 | AFMT_U16_LE | AFMT_U16_BE |
2452                                      AFMT_S8 | AFMT_S16_LE | AFMT_S16_BE)))
2453                                 return -EINVAL;
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))
2457                                 return -EIO;
2458                 }
2459                 val2 = (file->f_mode & FMODE_READ) ? as->usbin.dma.format : as->usbout.dma.format;
2460                 return put_user(val2 & ~AFMT_STEREO, user_arg);
2461
2462         case SNDCTL_DSP_POST:
2463                 return 0;
2464
2465         case SNDCTL_DSP_GETTRIGGER:
2466                 val = 0;
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);
2472
2473         case SNDCTL_DSP_SETTRIGGER:
2474                 if (get_user(val, user_arg))
2475                         return -EFAULT;
2476                 if (file->f_mode & FMODE_READ) {
2477                         if (val & PCM_ENABLE_INPUT) {
2478                                 if (!as->usbin.dma.ready && (ret = prog_dmabuf_in(as)))
2479                                         return ret;
2480                                 if (usbin_start(as))
2481                                         return -ENODEV;
2482                         } else
2483                                 usbin_stop(as);
2484                 }
2485                 if (file->f_mode & FMODE_WRITE) {
2486                         if (val & PCM_ENABLE_OUTPUT) {
2487                                 if (!as->usbout.dma.ready && (ret = prog_dmabuf_out(as)))
2488                                         return ret;
2489                                 if (usbout_start(as))
2490                                         return -ENODEV;
2491                         } else
2492                                 usbout_stop(as);
2493                 }
2494                 return 0;
2495
2496         case SNDCTL_DSP_GETOSPACE:
2497                 if (!(file->f_mode & FMODE_WRITE))
2498                         return -EINVAL;
2499                 if (!(as->usbout.flags & FLG_RUNNING) && (val = prog_dmabuf_out(as)) != 0)
2500                         return val;
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;
2508
2509         case SNDCTL_DSP_GETISPACE:
2510                 if (!(file->f_mode & FMODE_READ))
2511                         return -EINVAL;
2512                 if (!(as->usbin.flags & FLG_RUNNING) && (val = prog_dmabuf_in(as)) != 0)
2513                         return val;
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;
2521
2522         case SNDCTL_DSP_NONBLOCK:
2523                 file->f_flags |= O_NONBLOCK;
2524                 return 0;
2525
2526         case SNDCTL_DSP_GETODELAY:
2527                 if (!(file->f_mode & FMODE_WRITE))
2528                         return -EINVAL;
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);
2533
2534         case SNDCTL_DSP_GETIPTR:
2535                 if (!(file->f_mode & FMODE_READ))
2536                         return -EINVAL;
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)))
2545                         return -EFAULT;
2546                 return 0;
2547
2548         case SNDCTL_DSP_GETOPTR:
2549                 if (!(file->f_mode & FMODE_WRITE))
2550                         return -EINVAL;
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)))
2559                         return -EFAULT;
2560                 return 0;
2561
2562        case SNDCTL_DSP_GETBLKSIZE:
2563                 if (file->f_mode & FMODE_WRITE) {
2564                         if ((val = prog_dmabuf_out(as)))
2565                                 return val;
2566                         return put_user(as->usbout.dma.fragsize, user_arg);
2567                 }
2568                 if ((val = prog_dmabuf_in(as)))
2569                         return val;
2570                 return put_user(as->usbin.dma.fragsize, user_arg);
2571
2572         case SNDCTL_DSP_SETFRAGMENT:
2573                 if (get_user(val, user_arg))
2574                         return -EFAULT;
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;
2584                 }
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;
2594                 }
2595                 return 0;
2596
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))
2600                         return -EINVAL;
2601                 if (get_user(val, user_arg))
2602                         return -EFAULT;
2603                 if (val != 1 && val != 2 && val != 4)
2604                         return -EINVAL;
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;
2609                 return 0;
2610
2611         case SOUND_PCM_READ_RATE:
2612                 return put_user((file->f_mode & FMODE_READ) ?
2613                                 as->usbin.dma.srate : as->usbout.dma.srate,
2614                                 user_arg);
2615
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);
2619
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);
2623
2624         case SOUND_PCM_WRITE_FILTER:
2625         case SNDCTL_DSP_SETSYNCRO:
2626         case SOUND_PCM_READ_FILTER:
2627                 return -EINVAL;
2628         }
2629         dprintk((KERN_DEBUG "usbaudio: usb_audio_ioctl - no command found\n"));
2630         return -ENOIOCTLCMD;
2631 }
2632
2633 static int usb_audio_open(struct inode *inode, struct file *file)
2634 {
2635         unsigned int minor = iminor(inode);
2636         DECLARE_WAITQUEUE(wait, current);
2637         struct usb_audiodev *as;
2638         struct usb_audio_state *s;
2639
2640         for (;;) {
2641                 down(&open_sem);
2642                 list_for_each_entry(s, &audiodevs, audiodev) {
2643                         list_for_each_entry(as, &s->audiolist, list) {
2644                                 if (!((as->dev_audio ^ minor) & ~0xf))
2645                                         goto device_found;
2646                         }
2647                 }
2648                 up(&open_sem);
2649                 return -ENODEV;
2650
2651         device_found:
2652                 if (!s->usbdev) {
2653                         up(&open_sem);
2654                         return -EIO;
2655                 }
2656                 /* wait for device to become free */
2657                 if (!(as->open_mode & file->f_mode))
2658                         break;
2659                 if (file->f_flags & O_NONBLOCK) {
2660                         up(&open_sem);
2661                         return -EBUSY;
2662                 }
2663                 __set_current_state(TASK_INTERRUPTIBLE);
2664                 add_wait_queue(&open_wait, &wait);
2665                 up(&open_sem);
2666                 schedule();
2667                 __set_current_state(TASK_RUNNING);
2668                 remove_wait_queue(&open_wait, &wait);
2669                 if (signal_pending(current))
2670                         return -ERESTARTSYS;
2671         }
2672         if (file->f_mode & FMODE_READ)
2673                 as->usbin.dma.ossfragshift = as->usbin.dma.ossmaxfrags = as->usbin.dma.subdivision = 0;
2674         if (file->f_mode & FMODE_WRITE)
2675                 as->usbout.dma.ossfragshift = as->usbout.dma.ossmaxfrags = as->usbout.dma.subdivision = 0;
2676         if (set_format(as, file->f_mode, ((minor & 0xf) == SND_DEV_DSP16) ? AFMT_S16_LE : AFMT_U8 /* AFMT_ULAW */, 8000)) {
2677                 up(&open_sem);
2678                 return -EIO;
2679         }
2680         file->private_data = as;
2681         as->open_mode |= file->f_mode & (FMODE_READ | FMODE_WRITE);
2682         s->count++;
2683         up(&open_sem);
2684         return nonseekable_open(inode, file);
2685 }
2686
2687 static int usb_audio_release(struct inode *inode, struct file *file)
2688 {
2689         struct usb_audiodev *as = (struct usb_audiodev *)file->private_data;
2690         struct usb_audio_state *s;
2691         struct usb_device *dev;
2692
2693         lock_kernel();
2694         s = as->state;
2695         dev = s->usbdev;
2696         if (file->f_mode & FMODE_WRITE)
2697                 drain_out(as, file->f_flags & O_NONBLOCK);
2698         down(&open_sem);
2699         if (file->f_mode & FMODE_WRITE) {
2700                 usbout_stop(as);
2701                 if (dev && as->usbout.interface >= 0)
2702                         usb_set_interface(dev, as->usbout.interface, 0);
2703                 dmabuf_release(&as->usbout.dma);
2704                 usbout_release(as);
2705         }
2706         if (file->f_mode & FMODE_READ) {
2707                 usbin_stop(as);
2708                 if (dev && as->usbin.interface >= 0)
2709                         usb_set_interface(dev, as->usbin.interface, 0);
2710                 dmabuf_release(&as->usbin.dma);
2711                 usbin_release(as);
2712         }
2713         as->open_mode &= (~file->f_mode) & (FMODE_READ|FMODE_WRITE);
2714         release(s);
2715         wake_up(&open_wait);
2716         unlock_kernel();
2717         return 0;
2718 }
2719
2720 static /*const*/ struct file_operations usb_audio_fops = {
2721         .owner =        THIS_MODULE,
2722         .llseek =       no_llseek,
2723         .read =         usb_audio_read,
2724         .write =        usb_audio_write,
2725         .poll =         usb_audio_poll,
2726         .ioctl =        usb_audio_ioctl,
2727         .mmap =         usb_audio_mmap,
2728         .open =         usb_audio_open,
2729         .release =      usb_audio_release,
2730 };
2731
2732 /* --------------------------------------------------------------------- */
2733
2734 static int usb_audio_probe(struct usb_interface *iface,
2735                            const struct usb_device_id *id);
2736 static void usb_audio_disconnect(struct usb_interface *iface);
2737
2738 static struct usb_device_id usb_audio_ids [] = {
2739     { .match_flags = (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS),
2740       .bInterfaceClass = USB_CLASS_AUDIO, .bInterfaceSubClass = 1},
2741     { }                                         /* Terminating entry */
2742 };
2743
2744 MODULE_DEVICE_TABLE (usb, usb_audio_ids);
2745
2746 static struct usb_driver usb_audio_driver = {
2747         .owner =        THIS_MODULE,
2748         .name =         "audio",
2749         .probe =        usb_audio_probe,
2750         .disconnect =   usb_audio_disconnect,
2751         .id_table =     usb_audio_ids,
2752 };
2753
2754 static void *find_descriptor(void *descstart, unsigned int desclen, void *after,
2755                              u8 dtype, int iface, int altsetting)
2756 {
2757         u8 *p, *end, *next;
2758         int ifc = -1, as = -1;
2759
2760         p = descstart;
2761         end = p + desclen;
2762         for (; p < end;) {
2763                 if (p[0] < 2)
2764                         return NULL;
2765                 next = p + p[0];
2766                 if (next > end)
2767                         return NULL;
2768                 if (p[1] == USB_DT_INTERFACE) {
2769                         /* minimum length of interface descriptor */
2770                         if (p[0] < 9)
2771                                 return NULL;
2772                         ifc = p[2];
2773                         as = p[3];
2774                 }
2775                 if (p[1] == dtype && (!after || (void *)p > after) &&
2776                     (iface == -1 || iface == ifc) && (altsetting == -1 || altsetting == as)) {
2777                         return p;
2778                 }
2779                 p = next;
2780         }
2781         return NULL;
2782 }
2783
2784 static void *find_csinterface_descriptor(void *descstart, unsigned int desclen, void *after, u8 dsubtype, int iface, int altsetting)
2785 {
2786         unsigned char *p;
2787
2788         p = find_descriptor(descstart, desclen, after, USB_DT_CS_INTERFACE, iface, altsetting);
2789         while (p) {
2790                 if (p[0] >= 3 && p[2] == dsubtype)
2791                         return p;
2792                 p = find_descriptor(descstart, desclen, p, USB_DT_CS_INTERFACE, iface, altsetting);
2793         }
2794         return NULL;
2795 }
2796
2797 static void *find_audiocontrol_unit(void *descstart, unsigned int desclen, void *after, u8 unit, int iface)
2798 {
2799         unsigned char *p;
2800
2801         p = find_descriptor(descstart, desclen, after, USB_DT_CS_INTERFACE, iface, -1);
2802         while (p) {
2803                 if (p[0] >= 4 && p[2] >= INPUT_TERMINAL && p[2] <= EXTENSION_UNIT && p[3] == unit)
2804                         return p;
2805                 p = find_descriptor(descstart, desclen, p, USB_DT_CS_INTERFACE, iface, -1);
2806         }
2807         return NULL;
2808 }
2809
2810 static void usb_audio_parsestreaming(struct usb_audio_state *s, unsigned char *buffer, unsigned int buflen, int asifin, int asifout)
2811 {
2812         struct usb_device *dev = s->usbdev;
2813         struct usb_audiodev *as;
2814         struct usb_host_interface *alts;
2815         struct usb_interface *iface;
2816         struct audioformat *fp;
2817         unsigned char *fmt, *csep;
2818         unsigned int i, j, k, format, idx;
2819
2820         if (!(as = kmalloc(sizeof(struct usb_audiodev), GFP_KERNEL)))
2821                 return;
2822         memset(as, 0, sizeof(struct usb_audiodev));
2823         init_waitqueue_head(&as->usbin.dma.wait);
2824         init_waitqueue_head(&as->usbout.dma.wait);
2825         spin_lock_init(&as->lock);
2826         as->usbin.durb[0].urb = usb_alloc_urb (DESCFRAMES, GFP_KERNEL);
2827         as->usbin.durb[1].urb = usb_alloc_urb (DESCFRAMES, GFP_KERNEL);
2828         as->usbin.surb[0].urb = usb_alloc_urb (SYNCFRAMES, GFP_KERNEL);
2829         as->usbin.surb[1].urb = usb_alloc_urb (SYNCFRAMES, GFP_KERNEL);
2830         as->usbout.durb[0].urb = usb_alloc_urb (DESCFRAMES, GFP_KERNEL);
2831         as->usbout.durb[1].urb = usb_alloc_urb (DESCFRAMES, GFP_KERNEL);
2832         as->usbout.surb[0].urb = usb_alloc_urb (SYNCFRAMES, GFP_KERNEL);
2833         as->usbout.surb[1].urb = usb_alloc_urb (SYNCFRAMES, GFP_KERNEL);
2834         if ((!as->usbin.durb[0].urb) ||
2835             (!as->usbin.durb[1].urb) ||
2836             (!as->usbin.surb[0].urb) ||
2837             (!as->usbin.surb[1].urb) ||
2838             (!as->usbout.durb[0].urb) ||
2839             (!as->usbout.durb[1].urb) ||
2840             (!as->usbout.surb[0].urb) ||
2841             (!as->usbout.surb[1].urb)) {
2842                 usb_free_urb(as->usbin.durb[0].urb);
2843                 usb_free_urb(as->usbin.durb[1].urb);
2844                 usb_free_urb(as->usbin.surb[0].urb);
2845                 usb_free_urb(as->usbin.surb[1].urb);
2846                 usb_free_urb(as->usbout.durb[0].urb);
2847                 usb_free_urb(as->usbout.durb[1].urb);
2848                 usb_free_urb(as->usbout.surb[0].urb);
2849                 usb_free_urb(as->usbout.surb[1].urb);
2850                 kfree(as);
2851                 return;
2852         }
2853         as->state = s;
2854         as->usbin.interface = asifin;
2855         as->usbout.interface = asifout;
2856         /* search for input formats */
2857         if (asifin >= 0) {
2858                 as->usbin.flags = FLG_CONNECTED;
2859                 iface = usb_ifnum_to_if(dev, asifin);
2860                 for (idx = 0; idx < iface->num_altsetting; idx++) {
2861                         alts = &iface->altsetting[idx];
2862                         i = alts->desc.bAlternateSetting;
2863                         if (alts->desc.bInterfaceClass != USB_CLASS_AUDIO || alts->desc.bInterfaceSubClass != 2)
2864                                 continue;
2865                         if (alts->desc.bNumEndpoints < 1) {
2866                                 if (i != 0) {  /* altsetting 0 has no endpoints (Section B.3.4.1) */
2867                                         printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u does not have an endpoint\n",
2868                                                dev->devnum, asifin, i);
2869                                 }
2870                                 continue;
2871                         }
2872                         if ((alts->endpoint[0].desc.bmAttributes & 0x03) != 0x01 ||
2873                             !(alts->endpoint[0].desc.bEndpointAddress & 0x80)) {
2874                                 printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u first endpoint not isochronous in\n",
2875                                        dev->devnum, asifin, i);
2876                                 continue;
2877                         }
2878                         fmt = find_csinterface_descriptor(buffer, buflen, NULL, AS_GENERAL, asifin, i);
2879                         if (!fmt) {
2880                                 printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u FORMAT_TYPE descriptor not found\n",
2881                                        dev->devnum, asifin, i);
2882                                 continue;
2883                         }
2884                         if (fmt[0] < 7 || fmt[6] != 0 || (fmt[5] != 1 && fmt[5] != 2)) {
2885                                 printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u format not supported\n",
2886                                        dev->devnum, asifin, i);
2887                                 continue;
2888                         }
2889                         format = (fmt[5] == 2) ? (AFMT_U16_LE | AFMT_U8) : (AFMT_S16_LE | AFMT_S8);
2890                         fmt = find_csinterface_descriptor(buffer, buflen, NULL, FORMAT_TYPE, asifin, i);
2891                         if (!fmt) {
2892                                 printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u FORMAT_TYPE descriptor not found\n",
2893                                        dev->devnum, asifin, i);
2894                                 continue;
2895                         }
2896                         if (fmt[0] < 8+3*(fmt[7] ? fmt[7] : 2) || fmt[3] != 1) {
2897                                 printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u FORMAT_TYPE descriptor not supported\n",
2898                                        dev->devnum, asifin, i);
2899                                 continue;
2900                         }
2901                         if (fmt[4] < 1 || fmt[4] > 2 || fmt[5] < 1 || fmt[5] > 2) {
2902                                 printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u unsupported channels %u framesize %u\n",
2903                                        dev->devnum, asifin, i, fmt[4], fmt[5]);
2904                                 continue;
2905                         }
2906                         csep = find_descriptor(buffer, buflen, NULL, USB_DT_CS_ENDPOINT, asifin, i);
2907                         if (!csep || csep[0] < 7 || csep[2] != EP_GENERAL) {
2908                                 printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u no or invalid class specific endpoint descriptor\n",
2909                                        dev->devnum, asifin, i);
2910                                 continue;
2911                         }
2912                         if (as->numfmtin >= MAXFORMATS)
2913                                 continue;
2914                         fp = &as->fmtin[as->numfmtin++];
2915                         if (fmt[5] == 2)
2916                                 format &= (AFMT_U16_LE | AFMT_S16_LE);
2917                         else
2918                                 format &= (AFMT_U8 | AFMT_S8);
2919                         if (fmt[4] == 2)
2920                                 format |= AFMT_STEREO;
2921                         fp->format = format;
2922                         fp->altsetting = i;
2923                         fp->sratelo = fp->sratehi = fmt[8] | (fmt[9] << 8) | (fmt[10] << 16);
2924                         printk(KERN_INFO "usbaudio: valid input sample rate %u\n", fp->sratelo);
2925                         for (j = fmt[7] ? (fmt[7]-1) : 1; j > 0; j--) {
2926                                 k = fmt[8+3*j] | (fmt[9+3*j] << 8) | (fmt[10+3*j] << 16);
2927                                 printk(KERN_INFO "usbaudio: valid input sample rate %u\n", k);
2928                                 if (k > fp->sratehi)
2929                                         fp->sratehi = k;
2930                                 if (k < fp->sratelo)
2931                                         fp->sratelo = k;
2932                         }
2933                         fp->attributes = csep[3];
2934                         printk(KERN_INFO "usbaudio: device %u interface %u altsetting %u: format 0x%08x sratelo %u sratehi %u attributes 0x%02x\n",
2935                                dev->devnum, asifin, i, fp->format, fp->sratelo, fp->sratehi, fp->attributes);
2936                 }
2937         }
2938         /* search for output formats */
2939         if (asifout >= 0) {
2940                 as->usbout.flags = FLG_CONNECTED;
2941                 iface = usb_ifnum_to_if(dev, asifout);
2942                 for (idx = 0; idx < iface->num_altsetting; idx++) {
2943                         alts = &iface->altsetting[idx];
2944                         i = alts->desc.bAlternateSetting;
2945                         if (alts->desc.bInterfaceClass != USB_CLASS_AUDIO || alts->desc.bInterfaceSubClass != 2)
2946                                 continue;
2947                         if (alts->desc.bNumEndpoints < 1) {
2948                                 /* altsetting 0 should never have iso EPs */
2949                                 if (i != 0)
2950                                 printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u does not have an endpoint\n",
2951                                        dev->devnum, asifout, i);
2952                                 continue;
2953                         }
2954                         if ((alts->endpoint[0].desc.bmAttributes & 0x03) != 0x01 ||
2955                             (alts->endpoint[0].desc.bEndpointAddress & 0x80)) {
2956                                 printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u first endpoint not isochronous out\n",
2957                                        dev->devnum, asifout, i);
2958                                 continue;
2959                         }
2960                         /* See USB audio formats manual, section 2 */
2961                         fmt = find_csinterface_descriptor(buffer, buflen, NULL, AS_GENERAL, asifout, i);
2962                         if (!fmt) {
2963                                 printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u FORMAT_TYPE descriptor not found\n",
2964                                        dev->devnum, asifout, i);
2965                                 continue;
2966                         }
2967                         if (fmt[0] < 7 || fmt[6] != 0 || (fmt[5] != 1 && fmt[5] != 2)) {
2968                                 printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u format not supported\n",
2969                                        dev->devnum, asifout, i);
2970                                 continue;
2971                         }
2972                         format = (fmt[5] == 2) ? (AFMT_U16_LE | AFMT_U8) : (AFMT_S16_LE | AFMT_S8);
2973                         /* Dallas DS4201 workaround */
2974                         if (le16_to_cpu(dev->descriptor.idVendor) == 0x04fa &&
2975                             le16_to_cpu(dev->descriptor.idProduct) == 0x4201)
2976                                 format = (AFMT_S16_LE | AFMT_S8);
2977                         fmt = find_csinterface_descriptor(buffer, buflen, NULL, FORMAT_TYPE, asifout, i);
2978                         if (!fmt) {
2979                                 printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u FORMAT_TYPE descriptor not found\n",
2980                                        dev->devnum, asifout, i);
2981                                 continue;
2982                         }
2983                         if (fmt[0] < 8+3*(fmt[7] ? fmt[7] : 2) || fmt[3] != 1) {
2984                                 printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u FORMAT_TYPE descriptor not supported\n",
2985                                        dev->devnum, asifout, i);
2986                                 continue;
2987                         }
2988                         if (fmt[4] < 1 || fmt[4] > 2 || fmt[5] < 1 || fmt[5] > 2) {
2989                                 printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u unsupported channels %u framesize %u\n",
2990                                        dev->devnum, asifout, i, fmt[4], fmt[5]);
2991                                 continue;
2992                         }
2993                         csep = find_descriptor(buffer, buflen, NULL, USB_DT_CS_ENDPOINT, asifout, i);
2994                         if (!csep || csep[0] < 7 || csep[2] != EP_GENERAL) {
2995                                 printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u no or invalid class specific endpoint descriptor\n",
2996                                        dev->devnum, asifout, i);
2997                                 continue;
2998                         }
2999                         if (as->numfmtout >= MAXFORMATS)
3000                                 continue;
3001                         fp = &as->fmtout[as->numfmtout++];
3002                         if (fmt[5] == 2)
3003                                 format &= (AFMT_U16_LE | AFMT_S16_LE);
3004                         else
3005                                 format &= (AFMT_U8 | AFMT_S8);
3006                         if (fmt[4] == 2)
3007                                 format |= AFMT_STEREO;
3008                         fp->format = format;
3009                         fp->altsetting = i;
3010                         fp->sratelo = fp->sratehi = fmt[8] | (fmt[9] << 8) | (fmt[10] << 16);
3011                         printk(KERN_INFO "usbaudio: valid output sample rate %u\n", fp->sratelo);
3012                         for (j = fmt[7] ? (fmt[7]-1) : 1; j > 0; j--) {
3013                                 k = fmt[8+3*j] | (fmt[9+3*j] << 8) | (fmt[10+3*j] << 16);
3014                                 printk(KERN_INFO "usbaudio: valid output sample rate %u\n", k);
3015                                 if (k > fp->sratehi)
3016                                         fp->sratehi = k;
3017                                 if (k < fp->sratelo)
3018                                         fp->sratelo = k;
3019                         }
3020                         fp->attributes = csep[3];
3021                         printk(KERN_INFO "usbaudio: device %u interface %u altsetting %u: format 0x%08x sratelo %u sratehi %u attributes 0x%02x\n",
3022                                dev->devnum, asifout, i, fp->format, fp->sratelo, fp->sratehi, fp->attributes);
3023                 }
3024         }
3025         if (as->numfmtin == 0 && as->numfmtout == 0) {
3026                 usb_free_urb(as->usbin.durb[0].urb);
3027                 usb_free_urb(as->usbin.durb[1].urb);
3028                 usb_free_urb(as->usbin.surb[0].urb);
3029                 usb_free_urb(as->usbin.surb[1].urb);
3030                 usb_free_urb(as->usbout.durb[0].urb);
3031                 usb_free_urb(as->usbout.durb[1].urb);
3032                 usb_free_urb(as->usbout.surb[0].urb);
3033                 usb_free_urb(as->usbout.surb[1].urb);
3034                 kfree(as);
3035                 return;
3036         }
3037         if ((as->dev_audio = register_sound_dsp(&usb_audio_fops, -1)) < 0) {
3038                 printk(KERN_ERR "usbaudio: cannot register dsp\n");
3039                 usb_free_urb(as->usbin.durb[0].urb);
3040                 usb_free_urb(as->usbin.durb[1].urb);
3041                 usb_free_urb(as->usbin.surb[0].urb);
3042                 usb_free_urb(as->usbin.surb[1].urb);
3043                 usb_free_urb(as->usbout.durb[0].urb);
3044                 usb_free_urb(as->usbout.durb[1].urb);
3045                 usb_free_urb(as->usbout.surb[0].urb);
3046                 usb_free_urb(as->usbout.surb[1].urb);
3047                 kfree(as);
3048                 return;
3049         }
3050         printk(KERN_INFO "usbaudio: registered dsp 14,%d\n", as->dev_audio);
3051         /* everything successful */
3052         list_add_tail(&as->list, &s->audiolist);
3053 }
3054
3055 struct consmixstate {
3056         struct usb_audio_state *s;
3057         unsigned char *buffer;
3058         unsigned int buflen;
3059         unsigned int ctrlif;
3060         struct mixerchannel mixch[SOUND_MIXER_NRDEVICES];
3061         unsigned int nrmixch;
3062         unsigned int mixchmask;
3063         unsigned long unitbitmap[32/sizeof(unsigned long)];
3064         /* return values */
3065         unsigned int nrchannels;
3066         unsigned int termtype;
3067         unsigned int chconfig;
3068 };
3069
3070 static struct mixerchannel *getmixchannel(struct consmixstate *state, unsigned int nr)
3071 {
3072         struct mixerchannel *c;
3073
3074         if (nr >= SOUND_MIXER_NRDEVICES) {
3075                 printk(KERN_ERR "usbaudio: invalid OSS mixer channel %u\n", nr);
3076                 return NULL;
3077         }
3078         if (!(state->mixchmask & (1 << nr))) {
3079                 printk(KERN_WARNING "usbaudio: OSS mixer channel %u already in use\n", nr);
3080                 return NULL;
3081         }
3082         c = &state->mixch[state->nrmixch++];
3083         c->osschannel = nr;
3084         state->mixchmask &= ~(1 << nr);
3085         return c;
3086 }
3087
3088 static unsigned int getvolchannel(struct consmixstate *state)
3089 {
3090         unsigned int u;
3091
3092         if ((state->termtype & 0xff00) == 0x0000 && (state->mixchmask & SOUND_MASK_VOLUME))
3093                 return SOUND_MIXER_VOLUME;
3094         if ((state->termtype & 0xff00) == 0x0100) {
3095                 if (state->mixchmask & SOUND_MASK_PCM)
3096                         return SOUND_MIXER_PCM;
3097                 if (state->mixchmask & SOUND_MASK_ALTPCM)
3098                         return SOUND_MIXER_ALTPCM;
3099         }
3100         if ((state->termtype & 0xff00) == 0x0200 && (state->mixchmask & SOUND_MASK_MIC))
3101                 return SOUND_MIXER_MIC;
3102         if ((state->termtype & 0xff00) == 0x0300 && (state->mixchmask & SOUND_MASK_SPEAKER))
3103                 return SOUND_MIXER_SPEAKER;
3104         if ((state->termtype & 0xff00) == 0x0500) {
3105                 if (state->mixchmask & SOUND_MASK_PHONEIN)
3106                         return SOUND_MIXER_PHONEIN;
3107                 if (state->mixchmask & SOUND_MASK_PHONEOUT)
3108                         return SOUND_MIXER_PHONEOUT;
3109         }
3110         if (state->termtype >= 0x710 && state->termtype <= 0x711 && (state->mixchmask & SOUND_MASK_RADIO))
3111                 return SOUND_MIXER_RADIO;
3112         if (state->termtype >= 0x709 && state->termtype <= 0x70f && (state->mixchmask & SOUND_MASK_VIDEO))
3113                 return SOUND_MIXER_VIDEO;
3114         u = ffs(state->mixchmask & (SOUND_MASK_LINE | SOUND_MASK_CD | SOUND_MASK_LINE1 | SOUND_MASK_LINE2 | SOUND_MASK_LINE3 |
3115                                     SOUND_MASK_DIGITAL1 | SOUND_MASK_DIGITAL2 | SOUND_MASK_DIGITAL3));
3116         return u-1;
3117 }
3118
3119 static void prepmixch(struct consmixstate *state)
3120 {
3121         struct usb_device *dev = state->s->usbdev;
3122         struct mixerchannel *ch;
3123         unsigned char *buf;
3124         __s16 v1;
3125         unsigned int v2, v3;
3126
3127         if (!state->nrmixch || state->nrmixch > SOUND_MIXER_NRDEVICES)
3128                 return;
3129         buf = kmalloc(sizeof(*buf) * 2, GFP_KERNEL);
3130         if (!buf) {
3131                 printk(KERN_ERR "prepmixch: out of memory\n") ;
3132                 return;
3133         }
3134
3135         ch = &state->mixch[state->nrmixch-1];
3136         switch (ch->selector) {
3137         case 0:  /* mixer unit request */
3138                 if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_MIN, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
3139                                     (ch->chnum << 8) | 1, state->ctrlif | (ch->unitid << 8), buf, 2, 1000) < 0)
3140                         goto err;
3141                 ch->minval = buf[0] | (buf[1] << 8);
3142                 if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_MAX, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
3143                                     (ch->chnum << 8) | 1, state->ctrlif | (ch->unitid << 8), buf, 2, 1000) < 0)
3144                         goto err;
3145                 ch->maxval = buf[0] | (buf[1] << 8);
3146                 v2 = ch->maxval - ch->minval;
3147                 if (!v2)
3148                         v2 = 1;
3149                 if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
3150                                     (ch->chnum << 8) | 1, state->ctrlif | (ch->unitid << 8), buf, 2, 1000) < 0)
3151                         goto err;
3152                 v1 = buf[0] | (buf[1] << 8);
3153                 v3 = v1 - ch->minval;
3154                 v3 = 100 * v3 / v2;
3155                 if (v3 > 100)
3156                         v3 = 100;
3157                 ch->value = v3;
3158                 if (ch->flags & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT)) {
3159                         if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
3160                                             ((ch->chnum + !!(ch->flags & MIXFLG_STEREOIN)) << 8) | (1 + !!(ch->flags & MIXFLG_STEREOOUT)),
3161                                             state->ctrlif | (ch->unitid << 8), buf, 2, 1000) < 0)
3162                         goto err;
3163                         v1 = buf[0] | (buf[1] << 8);
3164                         v3 = v1 - ch->minval;
3165                         v3 = 100 * v3 / v2;
3166                         if (v3 > 100)
3167                                 v3 = 100;
3168                 }
3169                 ch->value |= v3 << 8;
3170                 break;
3171
3172                 /* various feature unit controls */
3173         case VOLUME_CONTROL:
3174                 if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_MIN, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
3175                                     (ch->selector << 8) | ch->chnum, state->ctrlif | (ch->unitid << 8), buf, 2, 1000) < 0)
3176                         goto err;
3177                 ch->minval = buf[0] | (buf[1] << 8);
3178                 if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_MAX, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
3179                                     (ch->selector << 8) | ch->chnum, state->ctrlif | (ch->unitid << 8), buf, 2, 1000) < 0)
3180                         goto err;
3181                 ch->maxval = buf[0] | (buf[1] << 8);
3182                 if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
3183                                     (ch->selector << 8) | ch->chnum, state->ctrlif | (ch->unitid << 8), buf, 2, 1000) < 0)
3184                         goto err;
3185                 v1 = buf[0] | (buf[1] << 8);
3186                 v2 = ch->maxval - ch->minval;
3187                 v3 = v1 - ch->minval;
3188                 if (!v2)
3189                         v2 = 1;
3190                 v3 = 100 * v3 / v2;
3191                 if (v3 > 100)
3192                         v3 = 100;
3193                 ch->value = v3;
3194                 if (ch->flags & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT)) {
3195                         if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
3196                                             (ch->selector << 8) | (ch->chnum + 1), state->ctrlif | (ch->unitid << 8), buf, 2, 1000) < 0)
3197                                 goto err;
3198                         v1 = buf[0] | (buf[1] << 8);
3199                         v3 = v1 - ch->minval;
3200                         v3 = 100 * v3 / v2;
3201                         if (v3 > 100)
3202                                 v3 = 100;
3203                 }
3204                 ch->value |= v3 << 8;
3205                 break;
3206
3207         case BASS_CONTROL:
3208         case MID_CONTROL:
3209         case TREBLE_CONTROL:
3210                 if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_MIN, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
3211                                     (ch->selector << 8) | ch->chnum, state->ctrlif | (ch->unitid << 8), buf, 1, 1000) < 0)
3212                         goto err;
3213                 ch->minval = buf[0] << 8;
3214                 if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_MAX, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
3215                                     (ch->selector << 8) | ch->chnum, state->ctrlif | (ch->unitid << 8), buf, 1, 1000) < 0)
3216                         goto err;
3217                 ch->maxval = buf[0] << 8;
3218                 if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
3219                                     (ch->selector << 8) | ch->chnum, state->ctrlif | (ch->unitid << 8), buf, 1, 1000) < 0)
3220                         goto err;
3221                 v1 = buf[0] << 8;
3222                 v2 = ch->maxval - ch->minval;
3223                 v3 = v1 - ch->minval;
3224                 if (!v2)
3225                         v2 = 1;
3226                 v3 = 100 * v3 / v2;
3227                 if (v3 > 100)
3228                         v3 = 100;
3229                 ch->value = v3;
3230                 if (ch->flags & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT)) {
3231                         if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
3232                                             (ch->selector << 8) | (ch->chnum + 1), state->ctrlif | (ch->unitid << 8), buf, 1, 1000) < 0)
3233                                 goto err;
3234                         v1 = buf[0] << 8;
3235                         v3 = v1 - ch->minval;
3236                         v3 = 100 * v3 / v2;
3237                         if (v3 > 100)
3238                                 v3 = 100;
3239                 }
3240                 ch->value |= v3 << 8;
3241                 break;
3242
3243         default:
3244                 goto err;
3245         }
3246
3247  freebuf:
3248         kfree(buf);
3249         return;
3250  err:
3251         printk(KERN_ERR "usbaudio: mixer request device %u if %u unit %u ch %u selector %u failed\n",
3252                dev->devnum, state->ctrlif, ch->unitid, ch->chnum, ch->selector);
3253         if (state->nrmixch)
3254                 state->nrmixch--;
3255         goto freebuf;
3256 }
3257
3258
3259 static void usb_audio_recurseunit(struct consmixstate *state, unsigned char unitid);
3260
3261 static inline int checkmixbmap(unsigned char *bmap, unsigned char flg, unsigned int inidx, unsigned int numoch)
3262 {
3263         unsigned int idx;
3264
3265         idx = inidx*numoch;
3266         if (!(bmap[-(idx >> 3)] & (0x80 >> (idx & 7))))
3267                 return 0;
3268         if (!(flg & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT)))
3269                 return 1;
3270         idx = (inidx+!!(flg & MIXFLG_STEREOIN))*numoch+!!(flg & MIXFLG_STEREOOUT);
3271         if (!(bmap[-(idx >> 3)] & (0x80 >> (idx & 7))))
3272                 return 0;
3273         return 1;
3274 }
3275
3276 static void usb_audio_mixerunit(struct consmixstate *state, unsigned char *mixer)
3277 {
3278         unsigned int nroutch = mixer[5+mixer[4]];
3279         unsigned int chidx[SOUND_MIXER_NRDEVICES+1];
3280         unsigned int termt[SOUND_MIXER_NRDEVICES];
3281         unsigned char flg = (nroutch >= 2) ? MIXFLG_STEREOOUT : 0;
3282         unsigned char *bmap = &mixer[9+mixer[4]];
3283         unsigned int bmapsize;
3284         struct mixerchannel *ch;
3285         unsigned int i;
3286
3287         if (!mixer[4]) {
3288                 printk(KERN_ERR "usbaudio: unit %u invalid MIXER_UNIT descriptor\n", mixer[3]);
3289                 return;
3290         }
3291         if (mixer[4] > SOUND_MIXER_NRDEVICES) {
3292                 printk(KERN_ERR "usbaudio: mixer unit %u: too many input pins\n", mixer[3]);
3293                 return;
3294         }
3295         chidx[0] = 0;
3296         for (i = 0; i < mixer[4]; i++) {
3297                 usb_audio_recurseunit(state, mixer[5+i]);
3298                 chidx[i+1] = chidx[i] + state->nrchannels;
3299                 termt[i] = state->termtype;
3300         }
3301         state->termtype = 0;
3302         state->chconfig = mixer[6+mixer[4]] | (mixer[7+mixer[4]] << 8);
3303         bmapsize = (nroutch * chidx[mixer[4]] + 7) >> 3;
3304         bmap += bmapsize - 1;
3305         if (mixer[0] < 10+mixer[4]+bmapsize) {
3306                 printk(KERN_ERR "usbaudio: unit %u invalid MIXER_UNIT descriptor (bitmap too small)\n", mixer[3]);
3307                 return;
3308         }
3309         for (i = 0; i < mixer[4]; i++) {
3310                 state->termtype = termt[i];
3311                 if (chidx[i+1]-chidx[i] >= 2) {
3312                         flg |= MIXFLG_STEREOIN;
3313                         if (checkmixbmap(bmap, flg, chidx[i], nroutch)) {
3314                                 ch = getmixchannel(state, getvolchannel(state));
3315                                 if (ch) {
3316                                         ch->unitid = mixer[3];
3317                                         ch->selector = 0;
3318                                         ch->chnum = chidx[i]+1;
3319                                         ch->flags = flg;
3320                                         prepmixch(state);
3321                                 }
3322                                 continue;
3323                         }
3324                 }
3325                 flg &= ~MIXFLG_STEREOIN;
3326                 if (checkmixbmap(bmap, flg, chidx[i], nroutch)) {
3327                         ch = getmixchannel(state, getvolchannel(state));
3328                         if (ch) {
3329                                 ch->unitid = mixer[3];
3330                                 ch->selector = 0;
3331                                 ch->chnum = chidx[i]+1;
3332                                 ch->flags = flg;
3333                                 prepmixch(state);
3334                         }
3335                 }
3336         }
3337         state->termtype = 0;
3338 }
3339
3340 static struct mixerchannel *slctsrc_findunit(struct consmixstate *state, __u8 unitid)
3341 {
3342         unsigned int i;
3343
3344         for (i = 0; i < state->nrmixch; i++)
3345                 if (state->mixch[i].unitid == unitid)
3346                         return &state->mixch[i];
3347         return NULL;
3348 }
3349
3350 static void usb_audio_selectorunit(struct consmixstate *state, unsigned char *selector)
3351 {
3352         unsigned int chnum, i, mixch;
3353         struct mixerchannel *mch;
3354
3355         if (!selector[4]) {
3356                 printk(KERN_ERR "usbaudio: unit %u invalid SELECTOR_UNIT descriptor\n", selector[3]);
3357                 return;
3358         }
3359         mixch = state->nrmixch;
3360         usb_audio_recurseunit(state, selector[5]);
3361         if (state->nrmixch != mixch) {
3362                 mch = &state->mixch[state->nrmixch-1];
3363                 mch->slctunitid = selector[3] | (1 << 8);
3364         } else if ((mch = slctsrc_findunit(state, selector[5]))) {
3365                 mch->slctunitid = selector[3] | (1 << 8);
3366         } else {
3367                 printk(KERN_INFO "usbaudio: selector unit %u: ignoring channel 1\n", selector[3]);
3368         }
3369         chnum = state->nrchannels;
3370         for (i = 1; i < selector[4]; i++) {
3371                 mixch = state->nrmixch;
3372                 usb_audio_recurseunit(state, selector[5+i]);
3373                 if (chnum != state->nrchannels) {
3374                         printk(KERN_ERR "usbaudio: selector unit %u: input pins with varying channel numbers\n", selector[3]);
3375                         state->termtype = 0;
3376                         state->chconfig = 0;
3377                         state->nrchannels = 0;
3378                         return;
3379                 }
3380                 if (state->nrmixch != mixch) {
3381                         mch = &state->mixch[state->nrmixch-1];
3382                         mch->slctunitid = selector[3] | ((i + 1) << 8);
3383                 } else if ((mch = slctsrc_findunit(state, selector[5+i]))) {
3384                         mch->slctunitid = selector[3] | ((i + 1) << 8);
3385                 } else {
3386                         printk(KERN_INFO "usbaudio: selector unit %u: ignoring channel %u\n", selector[3], i+1);
3387                 }
3388         }
3389         state->termtype = 0;
3390         state->chconfig = 0;
3391 }
3392
3393 /* in the future we might try to handle 3D etc. effect units */
3394
3395 static void usb_audio_processingunit(struct consmixstate *state, unsigned char *proc)
3396 {
3397         unsigned int i;
3398
3399         for (i = 0; i < proc[6]; i++)
3400                 usb_audio_recurseunit(state, proc[7+i]);
3401         state->nrchannels = proc[7+proc[6]];
3402         state->termtype = 0;
3403         state->chconfig = proc[8+proc[6]] | (proc[9+proc[6]] << 8);
3404 }
3405
3406
3407 /* See Audio Class Spec, section 4.3.2.5 */
3408 static void usb_audio_featureunit(struct consmixstate *state, unsigned char *ftr)
3409 {
3410         struct mixerchannel *ch;
3411         unsigned short chftr, mchftr;
3412 #if 0
3413         struct usb_device *dev = state->s->usbdev;
3414         unsigned char data[1];
3415 #endif
3416         unsigned char nr_logical_channels, i;
3417
3418         usb_audio_recurseunit(state, ftr[4]);
3419
3420         if (ftr[5] == 0 ) {
3421                 printk(KERN_ERR "usbaudio: wrong controls size in feature unit %u\n",ftr[3]);
3422                 return;
3423         }
3424
3425         if (state->nrchannels == 0) {
3426                 printk(KERN_ERR "usbaudio: feature unit %u source has no channels\n", ftr[3]);
3427                 return;
3428         }
3429         if (state->nrchannels > 2)
3430                 printk(KERN_WARNING "usbaudio: feature unit %u: OSS mixer interface does not support more than 2 channels\n", ftr[3]);
3431
3432         nr_logical_channels=(ftr[0]-7)/ftr[5]-1;
3433
3434         if (nr_logical_channels != state->nrchannels) {
3435                 printk(KERN_WARNING "usbaudio: warning: found %d of %d logical channels.\n", state->nrchannels,nr_logical_channels);
3436
3437                 if (state->nrchannels == 1 && nr_logical_channels==0) {
3438                         printk(KERN_INFO "usbaudio: assuming the channel found is the master channel (got a Philips camera?). Should be fine.\n");
3439                 } else if (state->nrchannels == 1 && nr_logical_channels==2) {
3440                         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");
3441                         state->nrchannels=nr_logical_channels;
3442                 } else {
3443                         printk(KERN_WARNING "usbaudio: no idea what's going on..., contact linux-usb-devel@lists.sourceforge.net\n");
3444                 }
3445         }
3446
3447         /* There is always a master channel */
3448         mchftr = ftr[6];
3449         /* Binary AND over logical channels if they exist */
3450         if (nr_logical_channels) {
3451                 chftr = ftr[6+ftr[5]];
3452                 for (i = 2; i <= nr_logical_channels; i++)
3453                         chftr &= ftr[6+i*ftr[5]];
3454         } else {
3455                 chftr = 0;
3456         }
3457
3458         /* volume control */
3459         if (chftr & 2) {
3460                 ch = getmixchannel(state, getvolchannel(state));
3461                 if (ch) {
3462                         ch->unitid = ftr[3];
3463                         ch->selector = VOLUME_CONTROL;
3464                         ch->chnum = 1;
3465                         ch->flags = (state->nrchannels > 1) ? (MIXFLG_STEREOIN | MIXFLG_STEREOOUT) : 0;
3466                         prepmixch(state);
3467                 }
3468         } else if (mchftr & 2) {
3469                 ch = getmixchannel(state, getvolchannel(state));
3470                 if (ch) {
3471                         ch->unitid = ftr[3];
3472                         ch->selector = VOLUME_CONTROL;
3473                         ch->chnum = 0;
3474                         ch->flags = 0;
3475                         prepmixch(state);
3476                 }
3477         }
3478         /* bass control */
3479         if (chftr & 4) {
3480                 ch = getmixchannel(state, SOUND_MIXER_BASS);
3481                 if (ch) {
3482                         ch->unitid = ftr[3];
3483                         ch->selector = BASS_CONTROL;
3484                         ch->chnum = 1;
3485                         ch->flags = (state->nrchannels > 1) ? (MIXFLG_STEREOIN | MIXFLG_STEREOOUT) : 0;
3486                         prepmixch(state);
3487                 }
3488         } else if (mchftr & 4) {
3489                 ch = getmixchannel(state, SOUND_MIXER_BASS);
3490                 if (ch) {
3491                         ch->unitid = ftr[3];
3492                         ch->selector = BASS_CONTROL;
3493                         ch->chnum = 0;
3494                         ch->flags = 0;
3495                         prepmixch(state);
3496                 }
3497         }
3498         /* treble control */
3499         if (chftr & 16) {
3500                 ch = getmixchannel(state, SOUND_MIXER_TREBLE);
3501                 if (ch) {
3502                         ch->unitid = ftr[3];
3503                         ch->selector = TREBLE_CONTROL;
3504                         ch->chnum = 1;
3505                         ch->flags = (state->nrchannels > 1) ? (MIXFLG_STEREOIN | MIXFLG_STEREOOUT) : 0;
3506                         prepmixch(state);
3507                 }
3508         } else if (mchftr & 16) {
3509                 ch = getmixchannel(state, SOUND_MIXER_TREBLE);
3510                 if (ch) {
3511                         ch->unitid = ftr[3];
3512                         ch->selector = TREBLE_CONTROL;
3513                         ch->chnum = 0;
3514                         ch->flags = 0;
3515                         prepmixch(state);
3516                 }
3517         }
3518 #if 0
3519         /* if there are mute controls, unmute them */
3520         /* does not seem to be necessary, and the Dallas chip does not seem to support the "all" channel (255) */
3521         if ((chftr & 1) || (mchftr & 1)) {
3522                 printk(KERN_DEBUG "usbaudio: unmuting feature unit %u interface %u\n", ftr[3], state->ctrlif);
3523                 data[0] = 0;
3524                 if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
3525                                     (MUTE_CONTROL << 8) | 0xff, state->ctrlif | (ftr[3] << 8), data, 1, 1000) < 0)
3526                         printk(KERN_WARNING "usbaudio: failure to unmute feature unit %u interface %u\n", ftr[3], state->ctrlif);
3527         }
3528 #endif
3529 }
3530
3531 static void usb_audio_recurseunit(struct consmixstate *state, unsigned char unitid)
3532 {
3533         unsigned char *p1;
3534         unsigned int i, j;
3535
3536         if (test_and_set_bit(unitid, state->unitbitmap)) {
3537                 printk(KERN_INFO "usbaudio: mixer path revisits unit %d\n", unitid);
3538                 return;
3539         }
3540         p1 = find_audiocontrol_unit(state->buffer, state->buflen, NULL, unitid, state->ctrlif);
3541         if (!p1) {
3542                 printk(KERN_ERR "usbaudio: unit %d not found!\n", unitid);
3543                 return;
3544         }
3545         state->nrchannels = 0;
3546         state->termtype = 0;
3547         state->chconfig = 0;
3548         switch (p1[2]) {
3549         case INPUT_TERMINAL:
3550                 if (p1[0] < 12) {
3551                         printk(KERN_ERR "usbaudio: unit %u: invalid INPUT_TERMINAL descriptor\n", unitid);
3552                         return;
3553                 }
3554                 state->nrchannels = p1[7];
3555                 state->termtype = p1[4] | (p1[5] << 8);
3556                 state->chconfig = p1[8] | (p1[9] << 8);
3557                 return;
3558
3559         case MIXER_UNIT:
3560                 if (p1[0] < 10 || p1[0] < 10+p1[4]) {
3561                         printk(KERN_ERR "usbaudio: unit %u: invalid MIXER_UNIT descriptor\n", unitid);
3562                         return;
3563                 }
3564                 usb_audio_mixerunit(state, p1);
3565                 return;
3566
3567         case SELECTOR_UNIT:
3568                 if (p1[0] < 6 || p1[0] < 6+p1[4]) {
3569                         printk(KERN_ERR "usbaudio: unit %u: invalid SELECTOR_UNIT descriptor\n", unitid);
3570                         return;
3571                 }
3572                 usb_audio_selectorunit(state, p1);
3573                 return;
3574
3575         case FEATURE_UNIT: /* See USB Audio Class Spec 4.3.2.5 */
3576                 if (p1[0] < 7 || p1[0] < 7+p1[5]) {
3577                         printk(KERN_ERR "usbaudio: unit %u: invalid FEATURE_UNIT descriptor\n", unitid);
3578                         return;
3579                 }
3580                 usb_audio_featureunit(state, p1);
3581                 return;
3582
3583         case PROCESSING_UNIT:
3584                 if (p1[0] < 13 || p1[0] < 13+p1[6] || p1[0] < 13+p1[6]+p1[11+p1[6]]) {
3585                         printk(KERN_ERR "usbaudio: unit %u: invalid PROCESSING_UNIT descriptor\n", unitid);
3586                         return;
3587                 }
3588                 usb_audio_processingunit(state, p1);
3589                 return;
3590
3591         case EXTENSION_UNIT:
3592                 if (p1[0] < 13 || p1[0] < 13+p1[6] || p1[0] < 13+p1[6]+p1[11+p1[6]]) {
3593                         printk(KERN_ERR "usbaudio: unit %u: invalid EXTENSION_UNIT descriptor\n", unitid);
3594                         return;
3595                 }
3596                 for (j = i = 0; i < p1[6]; i++) {
3597                         usb_audio_recurseunit(state, p1[7+i]);
3598                         if (!i)
3599                                 j = state->termtype;
3600                         else if (j != state->termtype)
3601                                 j = 0;
3602                 }
3603                 state->nrchannels = p1[7+p1[6]];
3604                 state->chconfig = p1[8+p1[6]] | (p1[9+p1[6]] << 8);
3605                 state->termtype = j;
3606                 return;
3607
3608         default:
3609                 printk(KERN_ERR "usbaudio: unit %u: unexpected type 0x%02x\n", unitid, p1[2]);
3610                 return;
3611         }
3612 }
3613
3614 static void usb_audio_constructmixer(struct usb_audio_state *s, unsigned char *buffer, unsigned int buflen, unsigned int ctrlif, unsigned char *oterm)
3615 {
3616         struct usb_mixerdev *ms;
3617         struct consmixstate state;
3618
3619         memset(&state, 0, sizeof(state));
3620         state.s = s;
3621         state.nrmixch = 0;
3622         state.mixchmask = ~0;
3623         state.buffer = buffer;
3624         state.buflen = buflen;
3625         state.ctrlif = ctrlif;
3626         set_bit(oterm[3], state.unitbitmap);  /* mark terminal ID as visited */
3627         printk(KERN_DEBUG "usbaudio: constructing mixer for Terminal %u type 0x%04x\n",
3628                oterm[3], oterm[4] | (oterm[5] << 8));
3629         usb_audio_recurseunit(&state, oterm[7]);
3630         if (!state.nrmixch) {
3631                 printk(KERN_INFO "usbaudio: no mixer controls found for Terminal %u\n", oterm[3]);
3632                 return;
3633         }
3634         if (!(ms = kmalloc(sizeof(struct usb_mixerdev)+state.nrmixch*sizeof(struct mixerchannel), GFP_KERNEL)))
3635                 return;
3636         memset(ms, 0, sizeof(struct usb_mixerdev));
3637         memcpy(&ms->ch, &state.mixch, state.nrmixch*sizeof(struct mixerchannel));
3638         ms->state = s;
3639         ms->iface = ctrlif;
3640         ms->numch = state.nrmixch;
3641         if ((ms->dev_mixer = register_sound_mixer(&usb_mixer_fops, -1)) < 0) {
3642                 printk(KERN_ERR "usbaudio: cannot register mixer\n");
3643                 kfree(ms);
3644                 return;
3645         }
3646         printk(KERN_INFO "usbaudio: registered mixer 14,%d\n", ms->dev_mixer);
3647         list_add_tail(&ms->list, &s->mixerlist);
3648 }
3649
3650 /* arbitrary limit, we won't check more interfaces than this */
3651 #define USB_MAXINTERFACES       32
3652
3653 static struct usb_audio_state *usb_audio_parsecontrol(struct usb_device *dev, unsigned char *buffer, unsigned int buflen, unsigned int ctrlif)
3654 {
3655         struct usb_audio_state *s;
3656         struct usb_interface *iface;
3657         struct usb_host_interface *alt;
3658         unsigned char ifin[USB_MAXINTERFACES], ifout[USB_MAXINTERFACES];
3659         unsigned char *p1;
3660         unsigned int i, j, k, numifin = 0, numifout = 0;
3661
3662         if (!(s = kmalloc(sizeof(struct usb_audio_state), GFP_KERNEL)))
3663                 return NULL;
3664         memset(s, 0, sizeof(struct usb_audio_state));
3665         INIT_LIST_HEAD(&s->audiolist);
3666         INIT_LIST_HEAD(&s->mixerlist);
3667         s->usbdev = dev;
3668         s->count = 1;
3669
3670         /* find audiocontrol interface */
3671         if (!(p1 = find_csinterface_descriptor(buffer, buflen, NULL, HEADER, ctrlif, -1))) {
3672                 printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u no HEADER found\n",
3673                        dev->devnum, ctrlif);
3674                 goto ret;
3675         }
3676         if (p1[0] < 8 + p1[7]) {
3677                 printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u HEADER error\n",
3678                        dev->devnum, ctrlif);
3679                 goto ret;
3680         }
3681         if (!p1[7])
3682                 printk(KERN_INFO "usbaudio: device %d audiocontrol interface %u has no AudioStreaming and MidiStreaming interfaces\n",
3683                        dev->devnum, ctrlif);
3684         for (i = 0; i < p1[7]; i++) {
3685                 j = p1[8+i];
3686                 iface = usb_ifnum_to_if(dev, j);
3687                 if (!iface) {
3688                         printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u interface %u does not exist\n",
3689                                dev->devnum, ctrlif, j);
3690                         continue;
3691                 }
3692                 if (iface->num_altsetting == 1) {
3693                         printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u has only 1 altsetting.\n", dev->devnum, ctrlif);
3694                         continue;
3695                 }
3696                 alt = usb_altnum_to_altsetting(iface, 0);
3697                 if (!alt) {
3698                         printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u interface %u has no altsetting 0\n",
3699                                dev->devnum, ctrlif, j);
3700                         continue;
3701                 }
3702                 if (alt->desc.bInterfaceClass != USB_CLASS_AUDIO) {
3703                         printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u interface %u is not an AudioClass interface\n",
3704                                dev->devnum, ctrlif, j);
3705                         continue;
3706                 }
3707                 if (alt->desc.bInterfaceSubClass == 3) {
3708                         printk(KERN_INFO "usbaudio: device %d audiocontrol interface %u interface %u MIDIStreaming not supported\n",
3709                                dev->devnum, ctrlif, j);
3710                         continue;
3711                 }
3712                 if (alt->desc.bInterfaceSubClass != 2) {
3713                         printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u interface %u invalid AudioClass subtype\n",
3714                                dev->devnum, ctrlif, j);
3715                         continue;
3716                 }
3717                 if (alt->desc.bNumEndpoints > 0) {
3718                         /* Check all endpoints; should they all have a bandwidth of 0 ? */
3719                         for (k = 0; k < alt->desc.bNumEndpoints; k++) {
3720                                 if (le16_to_cpu(alt->endpoint[k].desc.wMaxPacketSize) > 0) {
3721                                         printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u endpoint %d does not have 0 bandwidth at alt[0]\n", dev->devnum, ctrlif, k);
3722                                         break;
3723                                 }
3724                         }
3725                         if (k < alt->desc.bNumEndpoints)
3726                                 continue;
3727                 }
3728
3729                 alt = usb_altnum_to_altsetting(iface, 1);
3730                 if (!alt) {
3731                         printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u interface %u has no altsetting 1\n",
3732                                dev->devnum, ctrlif, j);
3733                         continue;
3734                 }
3735                 if (alt->desc.bNumEndpoints < 1) {
3736                         printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u interface %u has no endpoint\n",
3737                                dev->devnum, ctrlif, j);
3738                         continue;
3739                 }
3740                 /* note: this requires the data endpoint to be ep0 and the optional sync
3741                    ep to be ep1, which seems to be the case */
3742                 if (alt->endpoint[0].desc.bEndpointAddress & USB_DIR_IN) {
3743                         if (numifin < USB_MAXINTERFACES) {
3744                                 ifin[numifin++] = j;
3745                                 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1);
3746                         }
3747                 } else {
3748                         if (numifout < USB_MAXINTERFACES) {
3749                                 ifout[numifout++] = j;
3750                                 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1);
3751                         }
3752                 }
3753         }
3754         printk(KERN_INFO "usbaudio: device %d audiocontrol interface %u has %u input and %u output AudioStreaming interfaces\n",
3755                dev->devnum, ctrlif, numifin, numifout);
3756         for (i = 0; i < numifin && i < numifout; i++)
3757                 usb_audio_parsestreaming(s, buffer, buflen, ifin[i], ifout[i]);
3758         for (j = i; j < numifin; j++)
3759                 usb_audio_parsestreaming(s, buffer, buflen, ifin[i], -1);
3760         for (j = i; j < numifout; j++)
3761                 usb_audio_parsestreaming(s, buffer, buflen, -1, ifout[i]);
3762         /* now walk through all OUTPUT_TERMINAL descriptors to search for mixers */
3763         p1 = find_csinterface_descriptor(buffer, buflen, NULL, OUTPUT_TERMINAL, ctrlif, -1);
3764         while (p1) {
3765                 if (p1[0] >= 9)
3766                         usb_audio_constructmixer(s, buffer, buflen, ctrlif, p1);
3767                 p1 = find_csinterface_descriptor(buffer, buflen, p1, OUTPUT_TERMINAL, ctrlif, -1);
3768         }
3769
3770 ret:
3771         if (list_empty(&s->audiolist) && list_empty(&s->mixerlist)) {
3772                 kfree(s);
3773                 return NULL;
3774         }
3775         /* everything successful */
3776         down(&open_sem);
3777         list_add_tail(&s->audiodev, &audiodevs);
3778         up(&open_sem);
3779         printk(KERN_DEBUG "usb_audio_parsecontrol: usb_audio_state at %p\n", s);
3780         return s;
3781 }
3782
3783 /* we only care for the currently active configuration */
3784
3785 static int usb_audio_probe(struct usb_interface *intf,
3786                            const struct usb_device_id *id)
3787 {
3788         struct usb_device *dev = interface_to_usbdev (intf);
3789         struct usb_audio_state *s;
3790         unsigned char *buffer;
3791         unsigned int buflen;
3792
3793 #if 0
3794         printk(KERN_DEBUG "usbaudio: Probing if %i: IC %x, ISC %x\n", ifnum,
3795                config->interface[ifnum].altsetting[0].desc.bInterfaceClass,
3796                config->interface[ifnum].altsetting[0].desc.bInterfaceSubClass);
3797 #endif
3798
3799         /*
3800          * audiocontrol interface found
3801          * find which configuration number is active
3802          */
3803         buffer = dev->rawdescriptors[dev->actconfig - dev->config];
3804         buflen = le16_to_cpu(dev->actconfig->desc.wTotalLength);
3805         s = usb_audio_parsecontrol(dev, buffer, buflen, intf->altsetting->desc.bInterfaceNumber);
3806         if (s) {
3807                 usb_set_intfdata (intf, s);
3808                 return 0;
3809         }
3810         return -ENODEV;
3811 }
3812
3813
3814 /* a revoke facility would make things simpler */
3815
3816 static void usb_audio_disconnect(struct usb_interface *intf)
3817 {
3818         struct usb_audio_state *s = usb_get_intfdata (intf);
3819         struct usb_audiodev *as;
3820         struct usb_mixerdev *ms;
3821
3822         if (!s)
3823                 return;
3824
3825         /* we get called with -1 for every audiostreaming interface registered */
3826         if (s == (struct usb_audio_state *)-1) {
3827                 dprintk((KERN_DEBUG "usbaudio: note, usb_audio_disconnect called with -1\n"));
3828                 return;
3829         }
3830         if (!s->usbdev) {
3831                 dprintk((KERN_DEBUG "usbaudio: error,  usb_audio_disconnect already called for %p!\n", s));
3832                 return;
3833         }
3834         down(&open_sem);
3835         list_del_init(&s->audiodev);
3836         s->usbdev = NULL;
3837         usb_set_intfdata (intf, NULL);
3838
3839         /* deregister all audio and mixer devices, so no new processes can open this device */
3840         list_for_each_entry(as, &s->audiolist, list) {
3841                 usbin_disc(as);
3842                 usbout_disc(as);
3843                 wake_up(&as->usbin.dma.wait);
3844                 wake_up(&as->usbout.dma.wait);
3845                 if (as->dev_audio >= 0) {
3846                         unregister_sound_dsp(as->dev_audio);
3847                         printk(KERN_INFO "usbaudio: unregister dsp 14,%d\n", as->dev_audio);
3848                 }
3849                 as->dev_audio = -1;
3850         }
3851         list_for_each_entry(ms, &s->mixerlist, list) {
3852                 if (ms->dev_mixer >= 0) {
3853                         unregister_sound_mixer(ms->dev_mixer);
3854                         printk(KERN_INFO "usbaudio: unregister mixer 14,%d\n", ms->dev_mixer);
3855                 }
3856                 ms->dev_mixer = -1;
3857         }
3858         release(s);
3859         wake_up(&open_wait);
3860 }
3861
3862 static int __init usb_audio_init(void)
3863 {
3864         int result = usb_register(&usb_audio_driver);
3865         if (result == 0)
3866                 info(DRIVER_VERSION ":" DRIVER_DESC);
3867         return result;
3868 }
3869
3870
3871 static void __exit usb_audio_cleanup(void)
3872 {
3873         usb_deregister(&usb_audio_driver);
3874 }
3875
3876 module_init(usb_audio_init);
3877 module_exit(usb_audio_cleanup);
3878
3879 MODULE_AUTHOR( DRIVER_AUTHOR );
3880 MODULE_DESCRIPTION( DRIVER_DESC );
3881 MODULE_LICENSE("GPL");
3882