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                 if (remap_page_range(vma, start, virt_to_phys(db->sgbuf[nr]), PAGE_SIZE, prot))
 513                         return -EAGAIN;
 514                 start += PAGE_SIZE;
 515         }
 516         return 0;
 517 }
 518
 519 static void dmabuf_copyin(struct dmabuf *db, const void *buffer, unsigned int size)
 520 {
 521         unsigned int pgrem, rem;
 522
 523         db->total_bytes += size;
 524         for (;;) {
 525                 if (size <= 0)
 526                         return;
 527                 pgrem = ((~db->wrptr) & (PAGE_SIZE-1)) + 1;
 528                 if (pgrem > size)
 529                         pgrem = size;
 530                 rem = db->dmasize - db->wrptr;
 531                 if (pgrem > rem)
 532                         pgrem = rem;
 533                 memcpy((db->sgbuf[db->wrptr >> PAGE_SHIFT]) + (db->wrptr & (PAGE_SIZE-1)), buffer, pgrem);
 534                 size -= pgrem;
 535                 buffer += pgrem;
 536                 db->wrptr += pgrem;
 537                 if (db->wrptr >= db->dmasize)
 538                         db->wrptr = 0;
 539         }
 540 }
 541
 542 static void dmabuf_copyout(struct dmabuf *db, void *buffer, unsigned int size)
 543 {
 544         unsigned int pgrem, rem;
 545
 546         db->total_bytes += size;
 547         for (;;) {
 548                 if (size <= 0)
 549                         return;
 550                 pgrem = ((~db->rdptr) & (PAGE_SIZE-1)) + 1;
 551                 if (pgrem > size)
 552                         pgrem = size;
 553                 rem = db->dmasize - db->rdptr;
 554                 if (pgrem > rem)
 555                         pgrem = rem;
 556                 memcpy(buffer, (db->sgbuf[db->rdptr >> PAGE_SHIFT]) + (db->rdptr & (PAGE_SIZE-1)), pgrem);
 557                 size -= pgrem;
 558                 buffer += pgrem;
 559                 db->rdptr += pgrem;
 560                 if (db->rdptr >= db->dmasize)
 561                         db->rdptr = 0;
 562         }
 563 }
 564
 565 static int dmabuf_copyin_user(struct dmabuf *db, unsigned int ptr, const void __user *buffer, unsigned int size)
 566 {
 567         unsigned int pgrem, rem;
 568
 569         if (!db->ready || db->mapped)
 570                 return -EINVAL;
 571         for (;;) {
 572                 if (size <= 0)
 573                         return 0;
 574                 pgrem = ((~ptr) & (PAGE_SIZE-1)) + 1;
 575                 if (pgrem > size)
 576                         pgrem = size;
 577                 rem = db->dmasize - ptr;
 578                 if (pgrem > rem)
 579                         pgrem = rem;
 580                 if (copy_from_user((db->sgbuf[ptr >> PAGE_SHIFT]) + (ptr & (PAGE_SIZE-1)), buffer, pgrem))
 581                         return -EFAULT;
 582                 size -= pgrem;
 583                 buffer += pgrem;
 584                 ptr += pgrem;
 585                 if (ptr >= db->dmasize)
 586                         ptr = 0;
 587         }
 588 }
 589
 590 static int dmabuf_copyout_user(struct dmabuf *db, unsigned int ptr, void __user *buffer, unsigned int size)
 591 {
 592         unsigned int pgrem, rem;
 593
 594         if (!db->ready || db->mapped)
 595                 return -EINVAL;
 596         for (;;) {
 597                 if (size <= 0)
 598                         return 0;
 599                 pgrem = ((~ptr) & (PAGE_SIZE-1)) + 1;
 600                 if (pgrem > size)
 601                         pgrem = size;
 602                 rem = db->dmasize - ptr;
 603                 if (pgrem > rem)
 604                         pgrem = rem;
 605                 if (copy_to_user(buffer, (db->sgbuf[ptr >> PAGE_SHIFT]) + (ptr & (PAGE_SIZE-1)), pgrem))
 606                         return -EFAULT;
 607                 size -= pgrem;
 608                 buffer += pgrem;
 609                 ptr += pgrem;
 610                 if (ptr >= db->dmasize)
 611                         ptr = 0;
 612         }
 613 }
 614
 615 /* --------------------------------------------------------------------- */
 616 /*
 617  * USB I/O code. We do sample format conversion if necessary
 618  */
 619
 620 static void usbin_stop(struct usb_audiodev *as)
 621 {
 622         struct usbin *u = &as->usbin;
 623         unsigned long flags;
 624         unsigned int i, notkilled = 1;
 625
 626         spin_lock_irqsave(&as->lock, flags);
 627         u->flags &= ~FLG_RUNNING;
 628         i = u->flags;
 629         spin_unlock_irqrestore(&as->lock, flags);
 630         while (i & (FLG_URB0RUNNING|FLG_URB1RUNNING|FLG_SYNC0RUNNING|FLG_SYNC1RUNNING)) {
 631                 set_current_state(notkilled ? TASK_INTERRUPTIBLE : TASK_UNINTERRUPTIBLE);
 632                 schedule_timeout(1);
 633                 spin_lock_irqsave(&as->lock, flags);
 634                 i = u->flags;
 635                 spin_unlock_irqrestore(&as->lock, flags);
 636                 if (notkilled && signal_pending(current)) {
 637                         if (i & FLG_URB0RUNNING)
 638                                 usb_unlink_urb(u->durb[0].urb);
 639                         if (i & FLG_URB1RUNNING)
 640                                 usb_unlink_urb(u->durb[1].urb);
 641                         if (i & FLG_SYNC0RUNNING)
 642                                 usb_unlink_urb(u->surb[0].urb);
 643                         if (i & FLG_SYNC1RUNNING)
 644                                 usb_unlink_urb(u->surb[1].urb);
 645                         notkilled = 0;
 646                 }
 647         }
 648         set_current_state(TASK_RUNNING);
 649         if (u->durb[0].urb->transfer_buffer)
 650                 kfree(u->durb[0].urb->transfer_buffer);
 651         if (u->durb[1].urb->transfer_buffer)
 652                 kfree(u->durb[1].urb->transfer_buffer);
 653         if (u->surb[0].urb->transfer_buffer)
 654                 kfree(u->surb[0].urb->transfer_buffer);
 655         if (u->surb[1].urb->transfer_buffer)
 656                 kfree(u->surb[1].urb->transfer_buffer);
 657         u->durb[0].urb->transfer_buffer = u->durb[1].urb->transfer_buffer =
 658                 u->surb[0].urb->transfer_buffer = u->surb[1].urb->transfer_buffer = NULL;
 659 }
 660
 661 static inline void usbin_release(struct usb_audiodev *as)
 662 {
 663         usbin_stop(as);
 664 }
 665
 666 static void usbin_disc(struct usb_audiodev *as)
 667 {
 668         struct usbin *u = &as->usbin;
 669
 670         unsigned long flags;
 671
 672         spin_lock_irqsave(&as->lock, flags);
 673         u->flags &= ~(FLG_RUNNING | FLG_CONNECTED);
 674         spin_unlock_irqrestore(&as->lock, flags);
 675         usbin_stop(as);
 676 }
 677
 678 static void conversion(const void *ibuf, unsigned int ifmt, void *obuf, unsigned int ofmt, void *tmp, unsigned int scnt)
 679 {
 680         unsigned int cnt, i;
 681         __s16 *sp, *sp2, s;
 682         unsigned char *bp;
 683
 684         cnt = scnt;
 685         if (AFMT_ISSTEREO(ifmt))
 686                 cnt <<= 1;
 687         sp = ((__s16 *)tmp) + cnt;
 688         switch (ifmt & ~AFMT_STEREO) {
 689         case AFMT_U8:
 690                 for (bp = ((unsigned char *)ibuf)+cnt, i = 0; i < cnt; i++) {
 691                         bp--;
 692                         sp--;
 693                         *sp = (*bp ^ 0x80) << 8;
 694                 }
 695                 break;
 696
 697         case AFMT_S8:
 698                 for (bp = ((unsigned char *)ibuf)+cnt, i = 0; i < cnt; i++) {
 699                         bp--;
 700                         sp--;
 701                         *sp = *bp << 8;
 702                 }
 703                 break;
 704
 705         case AFMT_U16_LE:
 706                 for (bp = ((unsigned char *)ibuf)+2*cnt, i = 0; i < cnt; i++) {
 707                         bp -= 2;
 708                         sp--;
 709                         *sp = (bp[0] | (bp[1] << 8)) ^ 0x8000;
 710                 }
 711                 break;
 712
 713         case AFMT_U16_BE:
 714                 for (bp = ((unsigned char *)ibuf)+2*cnt, i = 0; i < cnt; i++) {
 715                         bp -= 2;
 716                         sp--;
 717                         *sp = (bp[1] | (bp[0] << 8)) ^ 0x8000;
 718                 }
 719                 break;
 720
 721         case AFMT_S16_LE:
 722                 for (bp = ((unsigned char *)ibuf)+2*cnt, i = 0; i < cnt; i++) {
 723                         bp -= 2;
 724                         sp--;
 725                         *sp = bp[0] | (bp[1] << 8);
 726                 }
 727                 break;
 728
 729         case AFMT_S16_BE:
 730                 for (bp = ((unsigned char *)ibuf)+2*cnt, i = 0; i < cnt; i++) {
 731                         bp -= 2;
 732                         sp--;
 733                         *sp = bp[1] | (bp[0] << 8);
 734                 }
 735                 break;
 736         }
 737         if (!AFMT_ISSTEREO(ifmt) && AFMT_ISSTEREO(ofmt)) {
 738                 /* expand from mono to stereo */
 739                 for (sp = ((__s16 *)tmp)+scnt, sp2 = ((__s16 *)tmp)+2*scnt, i = 0; i < scnt; i++) {
 740                         sp--;
 741                         sp2 -= 2;
 742                         sp2[0] = sp2[1] = sp[0];
 743                 }
 744         }
 745         if (AFMT_ISSTEREO(ifmt) && !AFMT_ISSTEREO(ofmt)) {
 746                 /* contract from stereo to mono */
 747                 for (sp = sp2 = ((__s16 *)tmp), i = 0; i < scnt; i++, sp++, sp2 += 2)
 748                         sp[0] = (sp2[0] + sp2[1]) >> 1;
 749         }
 750         cnt = scnt;
 751         if (AFMT_ISSTEREO(ofmt))
 752                 cnt <<= 1;
 753         sp = ((__s16 *)tmp);
 754         bp = ((unsigned char *)obuf);
 755         switch (ofmt & ~AFMT_STEREO) {
 756         case AFMT_U8:
 757                 for (i = 0; i < cnt; i++, sp++, bp++)
 758                         *bp = (*sp >> 8) ^ 0x80;
 759                 break;
 760
 761         case AFMT_S8:
 762                 for (i = 0; i < cnt; i++, sp++, bp++)
 763                         *bp = *sp >> 8;
 764                 break;
 765
 766         case AFMT_U16_LE:
 767                 for (i = 0; i < cnt; i++, sp++, bp += 2) {
 768                         s = *sp;
 769                         bp[0] = s;
 770                         bp[1] = (s >> 8) ^ 0x80;
 771                 }
 772                 break;
 773
 774         case AFMT_U16_BE:
 775                 for (i = 0; i < cnt; i++, sp++, bp += 2) {
 776                         s = *sp;
 777                         bp[1] = s;
 778                         bp[0] = (s >> 8) ^ 0x80;
 779                 }
 780                 break;
 781
 782         case AFMT_S16_LE:
 783                 for (i = 0; i < cnt; i++, sp++, bp += 2) {
 784                         s = *sp;
 785                         bp[0] = s;
 786                         bp[1] = s >> 8;
 787                 }
 788                 break;
 789
 790         case AFMT_S16_BE:
 791                 for (i = 0; i < cnt; i++, sp++, bp += 2) {
 792                         s = *sp;
 793                         bp[1] = s;
 794                         bp[0] = s >> 8;
 795                 }
 796                 break;
 797         }
 798
 799 }
 800
 801 static void usbin_convert(struct usbin *u, unsigned char *buffer, unsigned int samples)
 802 {
 803         union {
 804                 __s16 s[64];
 805                 unsigned char b[0];
 806         } tmp;
 807         unsigned int scnt, maxs, ufmtsh, dfmtsh;
 808
 809         ufmtsh = AFMT_BYTESSHIFT(u->format);
 810         dfmtsh = AFMT_BYTESSHIFT(u->dma.format);
 811         maxs = (AFMT_ISSTEREO(u->dma.format | u->format)) ? 32 : 64;
 812         while (samples > 0) {
 813                 scnt = samples;
 814                 if (scnt > maxs)
 815                         scnt = maxs;
 816                 conversion(buffer, u->format, tmp.b, u->dma.format, tmp.b, scnt);
 817                 dmabuf_copyin(&u->dma, tmp.b, scnt << dfmtsh);
 818                 buffer += scnt << ufmtsh;
 819                 samples -= scnt;
 820         }
 821 }
 822
 823 static int usbin_prepare_desc(struct usbin *u, struct urb *urb)
 824 {
 825         unsigned int i, maxsize, offs;
 826
 827         maxsize = (u->freqmax + 0x3fff) >> (14 - AFMT_BYTESSHIFT(u->format));
 828         //printk(KERN_DEBUG "usbin_prepare_desc: maxsize %d freq 0x%x format 0x%x\n", maxsize, u->freqn, u->format);
 829         for (i = offs = 0; i < DESCFRAMES; i++, offs += maxsize) {
 830                 urb->iso_frame_desc[i].length = maxsize;
 831                 urb->iso_frame_desc[i].offset = offs;
 832         }
 833         urb->interval = 1;
 834         return 0;
 835 }
 836
 837 /*
 838  * return value: 0 if descriptor should be restarted, -1 otherwise
 839  * convert sample format on the fly if necessary
 840  */
 841 static int usbin_retire_desc(struct usbin *u, struct urb *urb)
 842 {
 843         unsigned int i, ufmtsh, dfmtsh, err = 0, cnt, scnt, dmafree;
 844         unsigned char *cp;
 845
 846         ufmtsh = AFMT_BYTESSHIFT(u->format);
 847         dfmtsh = AFMT_BYTESSHIFT(u->dma.format);
 848         for (i = 0; i < DESCFRAMES; i++) {
 849                 cp = ((unsigned char *)urb->transfer_buffer) + urb->iso_frame_desc[i].offset;
 850                 if (urb->iso_frame_desc[i].status) {
 851                         dprintk((KERN_DEBUG "usbin_retire_desc: frame %u status %d\n", i, urb->iso_frame_desc[i].status));
 852                         continue;
 853                 }
 854                 scnt = urb->iso_frame_desc[i].actual_length >> ufmtsh;
 855                 if (!scnt)
 856                         continue;
 857                 cnt = scnt << dfmtsh;
 858                 if (!u->dma.mapped) {
 859                         dmafree = u->dma.dmasize - u->dma.count;
 860                         if (cnt > dmafree) {
 861                                 scnt = dmafree >> dfmtsh;
 862                                 cnt = scnt << dfmtsh;
 863                                 err++;
 864                         }
 865                 }
 866                 u->dma.count += cnt;
 867                 if (u->format == u->dma.format) {
 868                         /* we do not need format conversion */
 869                         dprintk((KERN_DEBUG "usbaudio: no sample format conversion\n"));
 870                         dmabuf_copyin(&u->dma, cp, cnt);
 871                 } else {
 872                         /* we need sampling format conversion */
 873                         dprintk((KERN_DEBUG "usbaudio: sample format conversion %x != %x\n", u->format, u->dma.format));
 874                         usbin_convert(u, cp, scnt);
 875                 }
 876         }
 877         if (err)
 878                 u->dma.error++;
 879         if (u->dma.count >= (signed)u->dma.fragsize)
 880                 wake_up(&u->dma.wait);
 881         return err ? -1 : 0;
 882 }
 883
 884 static void usbin_completed(struct urb *urb, struct pt_regs *regs)
 885 {
 886         struct usb_audiodev *as = (struct usb_audiodev *)urb->context;
 887         struct usbin *u = &as->usbin;
 888         unsigned long flags;
 889         unsigned int mask;
 890         int suret = 0;
 891
 892 #if 0
 893         printk(KERN_DEBUG "usbin_completed: status %d errcnt %d flags 0x%x\n", urb->status, urb->error_count, u->flags);
 894 #endif
 895         if (urb == u->durb[0].urb)
 896                 mask = FLG_URB0RUNNING;
 897         else if (urb == u->durb[1].urb)
 898                 mask = FLG_URB1RUNNING;
 899         else {
 900                 mask = 0;
 901                 printk(KERN_ERR "usbin_completed: panic: unknown URB\n");
 902         }
 903         urb->dev = as->state->usbdev;
 904         spin_lock_irqsave(&as->lock, flags);
 905         if (!usbin_retire_desc(u, urb) &&
 906             u->flags & FLG_RUNNING &&
 907             !usbin_prepare_desc(u, urb) &&
 908             (suret = usb_submit_urb(urb, GFP_ATOMIC)) == 0) {
 909                 u->flags |= mask;
 910         } else {
 911                 u->flags &= ~(mask | FLG_RUNNING);
 912                 wake_up(&u->dma.wait);
 913                 printk(KERN_DEBUG "usbin_completed: descriptor not restarted (usb_submit_urb: %d)\n", suret);
 914         }
 915         spin_unlock_irqrestore(&as->lock, flags);
 916 }
 917
 918 /*
 919  * we output sync data
 920  */
 921 static int usbin_sync_prepare_desc(struct usbin *u, struct urb *urb)
 922 {
 923         unsigned char *cp = urb->transfer_buffer;
 924         unsigned int i, offs;
 925
 926         for (i = offs = 0; i < SYNCFRAMES; i++, offs += 3, cp += 3) {
 927                 urb->iso_frame_desc[i].length = 3;
 928                 urb->iso_frame_desc[i].offset = offs;
 929                 cp[0] = u->freqn;
 930                 cp[1] = u->freqn >> 8;
 931                 cp[2] = u->freqn >> 16;
 932         }
 933         urb->interval = 1;
 934         return 0;
 935 }
 936
 937 /*
 938  * return value: 0 if descriptor should be restarted, -1 otherwise
 939  */
 940 static int usbin_sync_retire_desc(struct usbin *u, struct urb *urb)
 941 {
 942         unsigned int i;
 943
 944         for (i = 0; i < SYNCFRAMES; i++)
 945                 if (urb->iso_frame_desc[0].status)
 946                         dprintk((KERN_DEBUG "usbin_sync_retire_desc: frame %u status %d\n", i, urb->iso_frame_desc[i].status));
 947         return 0;
 948 }
 949
 950 static void usbin_sync_completed(struct urb *urb, struct pt_regs *regs)
 951 {
 952         struct usb_audiodev *as = (struct usb_audiodev *)urb->context;
 953         struct usbin *u = &as->usbin;
 954         unsigned long flags;
 955         unsigned int mask;
 956         int suret = 0;
 957
 958 #if 0
 959         printk(KERN_DEBUG "usbin_sync_completed: status %d errcnt %d flags 0x%x\n", urb->status, urb->error_count, u->flags);
 960 #endif
 961         if (urb == u->surb[0].urb)
 962                 mask = FLG_SYNC0RUNNING;
 963         else if (urb == u->surb[1].urb)
 964                 mask = FLG_SYNC1RUNNING;
 965         else {
 966                 mask = 0;
 967                 printk(KERN_ERR "usbin_sync_completed: panic: unknown URB\n");
 968         }
 969         urb->dev = as->state->usbdev;
 970         spin_lock_irqsave(&as->lock, flags);
 971         if (!usbin_sync_retire_desc(u, urb) &&
 972             u->flags & FLG_RUNNING &&
 973             !usbin_sync_prepare_desc(u, urb) &&
 974             (suret = usb_submit_urb(urb, GFP_ATOMIC)) == 0) {
 975                 u->flags |= mask;
 976         } else {
 977                 u->flags &= ~(mask | FLG_RUNNING);
 978                 wake_up(&u->dma.wait);
 979                 dprintk((KERN_DEBUG "usbin_sync_completed: descriptor not restarted (usb_submit_urb: %d)\n", suret));
 980         }
 981         spin_unlock_irqrestore(&as->lock, flags);
 982 }
 983
 984 static int usbin_start(struct usb_audiodev *as)
 985 {
 986         struct usb_device *dev = as->state->usbdev;
 987         struct usbin *u = &as->usbin;
 988         struct urb *urb;
 989         unsigned long flags;
 990         unsigned int maxsze, bufsz;
 991
 992 #if 0
 993         printk(KERN_DEBUG "usbin_start: device %d ufmt 0x%08x dfmt 0x%08x srate %d\n",
 994                dev->devnum, u->format, u->dma.format, u->dma.srate);
 995 #endif
 996         /* allocate USB storage if not already done */
 997         spin_lock_irqsave(&as->lock, flags);
 998         if (!(u->flags & FLG_CONNECTED)) {
 999                 spin_unlock_irqrestore(&as->lock, flags);
1000                 return -EIO;
1001         }
1002         if (!(u->flags & FLG_RUNNING)) {
1003                 spin_unlock_irqrestore(&as->lock, flags);
1004                 u->freqn = ((u->dma.srate << 11) + 62) / 125; /* this will overflow at approx 2MSPS */
1005                 u->freqmax = u->freqn + (u->freqn >> 2);
1006                 u->phase = 0;
1007                 maxsze = (u->freqmax + 0x3fff) >> (14 - AFMT_BYTESSHIFT(u->format));
1008                 bufsz = DESCFRAMES * maxsze;
1009                 if (u->durb[0].urb->transfer_buffer)
1010                         kfree(u->durb[0].urb->transfer_buffer);
1011                 u->durb[0].urb->transfer_buffer = kmalloc(bufsz, GFP_KERNEL);
1012                 u->durb[0].urb->transfer_buffer_length = bufsz;
1013                 if (u->durb[1].urb->transfer_buffer)
1014                         kfree(u->durb[1].urb->transfer_buffer);
1015                 u->durb[1].urb->transfer_buffer = kmalloc(bufsz, GFP_KERNEL);
1016                 u->durb[1].urb->transfer_buffer_length = bufsz;
1017                 if (u->syncpipe) {
1018                         if (u->surb[0].urb->transfer_buffer)
1019                                 kfree(u->surb[0].urb->transfer_buffer);
1020                         u->surb[0].urb->transfer_buffer = kmalloc(3*SYNCFRAMES, GFP_KERNEL);
1021                         u->surb[0].urb->transfer_buffer_length = 3*SYNCFRAMES;
1022                         if (u->surb[1].urb->transfer_buffer)
1023                                 kfree(u->surb[1].urb->transfer_buffer);
1024                         u->surb[1].urb->transfer_buffer = kmalloc(3*SYNCFRAMES, GFP_KERNEL);
1025                         u->surb[1].urb->transfer_buffer_length = 3*SYNCFRAMES;
1026                 }
1027                 if (!u->durb[0].urb->transfer_buffer || !u->durb[1].urb->transfer_buffer ||
1028                     (u->syncpipe && (!u->surb[0].urb->transfer_buffer || !u->surb[1].urb->transfer_buffer))) {
1029                         printk(KERN_ERR "usbaudio: cannot start playback device %d\n", dev->devnum);
1030                         return 0;
1031                 }
1032                 spin_lock_irqsave(&as->lock, flags);
1033         }
1034         if (u->dma.count >= u->dma.dmasize && !u->dma.mapped) {
1035                 spin_unlock_irqrestore(&as->lock, flags);
1036                 return 0;
1037         }
1038         u->flags |= FLG_RUNNING;
1039         if (!(u->flags & FLG_URB0RUNNING)) {
1040                 urb = u->durb[0].urb;
1041                 urb->dev = dev;
1042                 urb->pipe = u->datapipe;
1043                 urb->transfer_flags = URB_ISO_ASAP;
1044                 urb->number_of_packets = DESCFRAMES;
1045                 urb->context = as;
1046                 urb->complete = usbin_completed;
1047                 if (!usbin_prepare_desc(u, urb) && !usb_submit_urb(urb, GFP_KERNEL))
1048                         u->flags |= FLG_URB0RUNNING;
1049                 else
1050                         u->flags &= ~FLG_RUNNING;
1051         }
1052         if (u->flags & FLG_RUNNING && !(u->flags & FLG_URB1RUNNING)) {
1053                 urb = u->durb[1].urb;
1054                 urb->dev = dev;
1055                 urb->pipe = u->datapipe;
1056                 urb->transfer_flags = URB_ISO_ASAP;
1057                 urb->number_of_packets = DESCFRAMES;
1058                 urb->context = as;
1059                 urb->complete = usbin_completed;
1060                 if (!usbin_prepare_desc(u, urb) && !usb_submit_urb(urb, GFP_KERNEL))
1061                         u->flags |= FLG_URB1RUNNING;
1062                 else
1063                         u->flags &= ~FLG_RUNNING;
1064         }
1065         if (u->syncpipe) {
1066                 if (u->flags & FLG_RUNNING && !(u->flags & FLG_SYNC0RUNNING)) {
1067                         urb = u->surb[0].urb;
1068                         urb->dev = dev;
1069                         urb->pipe = u->syncpipe;
1070                         urb->transfer_flags = URB_ISO_ASAP;
1071                         urb->number_of_packets = SYNCFRAMES;
1072                         urb->context = as;
1073                         urb->complete = usbin_sync_completed;
1074                         /* stride: u->syncinterval */
1075                         if (!usbin_sync_prepare_desc(u, urb) && !usb_submit_urb(urb, GFP_KERNEL))
1076                                 u->flags |= FLG_SYNC0RUNNING;
1077                         else
1078                                 u->flags &= ~FLG_RUNNING;
1079                 }
1080                 if (u->flags & FLG_RUNNING && !(u->flags & FLG_SYNC1RUNNING)) {
1081                         urb = u->surb[1].urb;
1082                         urb->dev = dev;
1083                         urb->pipe = u->syncpipe;
1084                         urb->transfer_flags = URB_ISO_ASAP;
1085                         urb->number_of_packets = SYNCFRAMES;
1086                         urb->context = as;
1087                         urb->complete = usbin_sync_completed;
1088                         /* stride: u->syncinterval */
1089                         if (!usbin_sync_prepare_desc(u, urb) && !usb_submit_urb(urb, GFP_KERNEL))
1090                                 u->flags |= FLG_SYNC1RUNNING;
1091                         else
1092                                 u->flags &= ~FLG_RUNNING;
1093                 }
1094         }
1095         spin_unlock_irqrestore(&as->lock, flags);
1096         return 0;
1097 }
1098
1099 static void usbout_stop(struct usb_audiodev *as)
1100 {
1101         struct usbout *u = &as->usbout;
1102         unsigned long flags;
1103         unsigned int i, notkilled = 1;
1104
1105         spin_lock_irqsave(&as->lock, flags);
1106         u->flags &= ~FLG_RUNNING;
1107         i = u->flags;
1108         spin_unlock_irqrestore(&as->lock, flags);
1109         while (i & (FLG_URB0RUNNING|FLG_URB1RUNNING|FLG_SYNC0RUNNING|FLG_SYNC1RUNNING)) {
1110                 set_current_state(notkilled ? TASK_INTERRUPTIBLE : TASK_UNINTERRUPTIBLE);
1111                 schedule_timeout(1);
1112                 spin_lock_irqsave(&as->lock, flags);
1113                 i = u->flags;
1114                 spin_unlock_irqrestore(&as->lock, flags);
1115                 if (notkilled && signal_pending(current)) {
1116                         if (i & FLG_URB0RUNNING)
1117                                 usb_unlink_urb(u->durb[0].urb);
1118                         if (i & FLG_URB1RUNNING)
1119                                 usb_unlink_urb(u->durb[1].urb);
1120                         if (i & FLG_SYNC0RUNNING)
1121                                 usb_unlink_urb(u->surb[0].urb);
1122                         if (i & FLG_SYNC1RUNNING)
1123                                 usb_unlink_urb(u->surb[1].urb);
1124                         notkilled = 0;
1125                 }
1126         }
1127         set_current_state(TASK_RUNNING);
1128         if (u->durb[0].urb->transfer_buffer)
1129                 kfree(u->durb[0].urb->transfer_buffer);
1130         if (u->durb[1].urb->transfer_buffer)
1131                 kfree(u->durb[1].urb->transfer_buffer);
1132         if (u->surb[0].urb->transfer_buffer)
1133                 kfree(u->surb[0].urb->transfer_buffer);
1134         if (u->surb[1].urb->transfer_buffer)
1135                 kfree(u->surb[1].urb->transfer_buffer);
1136         u->durb[0].urb->transfer_buffer = u->durb[1].urb->transfer_buffer =
1137                 u->surb[0].urb->transfer_buffer = u->surb[1].urb->transfer_buffer = NULL;
1138 }
1139
1140 static inline void usbout_release(struct usb_audiodev *as)
1141 {
1142         usbout_stop(as);
1143 }
1144
1145 static void usbout_disc(struct usb_audiodev *as)
1146 {
1147         struct usbout *u = &as->usbout;
1148         unsigned long flags;
1149
1150         spin_lock_irqsave(&as->lock, flags);
1151         u->flags &= ~(FLG_RUNNING | FLG_CONNECTED);
1152         spin_unlock_irqrestore(&as->lock, flags);
1153         usbout_stop(as);
1154 }
1155
1156 static void usbout_convert(struct usbout *u, unsigned char *buffer, unsigned int samples)
1157 {
1158         union {
1159                 __s16 s[64];
1160                 unsigned char b[0];
1161         } tmp;
1162         unsigned int scnt, maxs, ufmtsh, dfmtsh;
1163
1164         ufmtsh = AFMT_BYTESSHIFT(u->format);
1165         dfmtsh = AFMT_BYTESSHIFT(u->dma.format);
1166         maxs = (AFMT_ISSTEREO(u->dma.format | u->format)) ? 32 : 64;
1167         while (samples > 0) {
1168                 scnt = samples;
1169                 if (scnt > maxs)
1170                         scnt = maxs;
1171                 dmabuf_copyout(&u->dma, tmp.b, scnt << dfmtsh);
1172                 conversion(tmp.b, u->dma.format, buffer, u->format, tmp.b, scnt);
1173                 buffer += scnt << ufmtsh;
1174                 samples -= scnt;
1175         }
1176 }
1177
1178 static int usbout_prepare_desc(struct usbout *u, struct urb *urb)
1179 {
1180         unsigned int i, ufmtsh, dfmtsh, err = 0, cnt, scnt, offs;
1181         unsigned char *cp = urb->transfer_buffer;
1182
1183         ufmtsh = AFMT_BYTESSHIFT(u->format);
1184         dfmtsh = AFMT_BYTESSHIFT(u->dma.format);
1185         for (i = offs = 0; i < DESCFRAMES; i++) {
1186                 urb->iso_frame_desc[i].offset = offs;
1187                 u->phase = (u->phase & 0x3fff) + u->freqm;
1188                 scnt = u->phase >> 14;
1189                 if (!scnt) {
1190                         urb->iso_frame_desc[i].length = 0;
1191                         continue;
1192                 }
1193                 cnt = scnt << dfmtsh;
1194                 if (!u->dma.mapped) {
1195                         if (cnt > u->dma.count) {
1196                                 scnt = u->dma.count >> dfmtsh;
1197                                 cnt = scnt << dfmtsh;
1198                                 err++;
1199                         }
1200                         u->dma.count -= cnt;
1201                 } else
1202                         u->dma.count += cnt;
1203                 if (u->format == u->dma.format) {
1204                         /* we do not need format conversion */
1205                         dmabuf_copyout(&u->dma, cp, cnt);
1206                 } else {
1207                         /* we need sampling format conversion */
1208                         usbout_convert(u, cp, scnt);
1209                 }
1210                 cnt = scnt << ufmtsh;
1211                 urb->iso_frame_desc[i].length = cnt;
1212                 offs += cnt;
1213                 cp += cnt;
1214         }
1215         urb->interval = 1;
1216         if (err)
1217                 u->dma.error++;
1218         if (u->dma.mapped) {
1219                 if (u->dma.count >= (signed)u->dma.fragsize)
1220                         wake_up(&u->dma.wait);
1221         } else {
1222                 if ((signed)u->dma.dmasize >= u->dma.count + (signed)u->dma.fragsize)
1223                         wake_up(&u->dma.wait);
1224         }
1225         return err ? -1 : 0;
1226 }
1227
1228 /*
1229  * return value: 0 if descriptor should be restarted, -1 otherwise
1230  */
1231 static int usbout_retire_desc(struct usbout *u, struct urb *urb)
1232 {
1233         unsigned int i;
1234
1235         for (i = 0; i < DESCFRAMES; i++) {
1236                 if (urb->iso_frame_desc[i].status) {
1237                         dprintk((KERN_DEBUG "usbout_retire_desc: frame %u status %d\n", i, urb->iso_frame_desc[i].status));
1238                         continue;
1239                 }
1240         }
1241         return 0;
1242 }
1243
1244 static void usbout_completed(struct urb *urb, struct pt_regs *regs)
1245 {
1246         struct usb_audiodev *as = (struct usb_audiodev *)urb->context;
1247         struct usbout *u = &as->usbout;
1248         unsigned long flags;
1249         unsigned int mask;
1250         int suret = 0;
1251
1252 #if 0
1253         printk(KERN_DEBUG "usbout_completed: status %d errcnt %d flags 0x%x\n", urb->status, urb->error_count, u->flags);
1254 #endif
1255         if (urb == u->durb[0].urb)
1256                 mask = FLG_URB0RUNNING;
1257         else if (urb == u->durb[1].urb)
1258                 mask = FLG_URB1RUNNING;
1259         else {
1260                 mask = 0;
1261                 printk(KERN_ERR "usbout_completed: panic: unknown URB\n");
1262         }
1263         urb->dev = as->state->usbdev;
1264         spin_lock_irqsave(&as->lock, flags);
1265         if (!usbout_retire_desc(u, urb) &&
1266             u->flags & FLG_RUNNING &&
1267             !usbout_prepare_desc(u, urb) &&
1268             (suret = usb_submit_urb(urb, GFP_ATOMIC)) == 0) {
1269                 u->flags |= mask;
1270         } else {
1271                 u->flags &= ~(mask | FLG_RUNNING);
1272                 wake_up(&u->dma.wait);
1273                 dprintk((KERN_DEBUG "usbout_completed: descriptor not restarted (usb_submit_urb: %d)\n", suret));
1274         }
1275         spin_unlock_irqrestore(&as->lock, flags);
1276 }
1277
1278 static int usbout_sync_prepare_desc(struct usbout *u, struct urb *urb)
1279 {
1280         unsigned int i, offs;
1281
1282         for (i = offs = 0; i < SYNCFRAMES; i++, offs += 3) {
1283                 urb->iso_frame_desc[i].length = 3;
1284                 urb->iso_frame_desc[i].offset = offs;
1285         }
1286         urb->interval = 1;
1287         return 0;
1288 }
1289
1290 /*
1291  * return value: 0 if descriptor should be restarted, -1 otherwise
1292  */
1293 static int usbout_sync_retire_desc(struct usbout *u, struct urb *urb)
1294 {
1295         unsigned char *cp = urb->transfer_buffer;
1296         unsigned int f, i;
1297
1298         for (i = 0; i < SYNCFRAMES; i++, cp += 3) {
1299                 if (urb->iso_frame_desc[i].status) {
1300                         dprintk((KERN_DEBUG "usbout_sync_retire_desc: frame %u status %d\n", i, urb->iso_frame_desc[i].status));
1301                         continue;
1302                 }
1303                 if (urb->iso_frame_desc[i].actual_length < 3) {
1304                         dprintk((KERN_DEBUG "usbout_sync_retire_desc: frame %u length %d\n", i, urb->iso_frame_desc[i].actual_length));
1305                         continue;
1306                 }
1307                 f = cp[0] | (cp[1] << 8) | (cp[2] << 16);
1308                 if (abs(f - u->freqn) > (u->freqn >> 3) || f > u->freqmax) {
1309                         printk(KERN_WARNING "usbout_sync_retire_desc: requested frequency %u (nominal %u) out of range!\n", f, u->freqn);
1310                         continue;
1311                 }
1312                 u->freqm = f;
1313         }
1314         return 0;
1315 }
1316
1317 static void usbout_sync_completed(struct urb *urb, struct pt_regs *regs)
1318 {
1319         struct usb_audiodev *as = (struct usb_audiodev *)urb->context;
1320         struct usbout *u = &as->usbout;
1321         unsigned long flags;
1322         unsigned int mask;
1323         int suret = 0;
1324
1325 #if 0
1326         printk(KERN_DEBUG "usbout_sync_completed: status %d errcnt %d flags 0x%x\n", urb->status, urb->error_count, u->flags);
1327 #endif
1328         if (urb == u->surb[0].urb)
1329                 mask = FLG_SYNC0RUNNING;
1330         else if (urb == u->surb[1].urb)
1331                 mask = FLG_SYNC1RUNNING;
1332         else {
1333                 mask = 0;
1334                 printk(KERN_ERR "usbout_sync_completed: panic: unknown URB\n");
1335         }
1336         urb->dev = as->state->usbdev;
1337         spin_lock_irqsave(&as->lock, flags);
1338         if (!usbout_sync_retire_desc(u, urb) &&
1339             u->flags & FLG_RUNNING &&
1340             !usbout_sync_prepare_desc(u, urb) &&
1341             (suret = usb_submit_urb(urb, GFP_ATOMIC)) == 0) {
1342                 u->flags |= mask;
1343         } else {
1344                 u->flags &= ~(mask | FLG_RUNNING);
1345                 wake_up(&u->dma.wait);
1346                 dprintk((KERN_DEBUG "usbout_sync_completed: descriptor not restarted (usb_submit_urb: %d)\n", suret));
1347         }
1348         spin_unlock_irqrestore(&as->lock, flags);
1349 }
1350
1351 static int usbout_start(struct usb_audiodev *as)
1352 {
1353         struct usb_device *dev = as->state->usbdev;
1354         struct usbout *u = &as->usbout;
1355         struct urb *urb;
1356         unsigned long flags;
1357         unsigned int maxsze, bufsz;
1358
1359 #if 0
1360         printk(KERN_DEBUG "usbout_start: device %d ufmt 0x%08x dfmt 0x%08x srate %d\n",
1361                dev->devnum, u->format, u->dma.format, u->dma.srate);
1362 #endif
1363         /* allocate USB storage if not already done */
1364         spin_lock_irqsave(&as->lock, flags);
1365         if (!(u->flags & FLG_CONNECTED)) {
1366                 spin_unlock_irqrestore(&as->lock, flags);
1367                 return -EIO;
1368         }
1369         if (!(u->flags & FLG_RUNNING)) {
1370                 spin_unlock_irqrestore(&as->lock, flags);
1371                 u->freqn = u->freqm = ((u->dma.srate << 11) + 62) / 125; /* this will overflow at approx 2MSPS */
1372                 u->freqmax = u->freqn + (u->freqn >> 2);
1373                 u->phase = 0;
1374                 maxsze = (u->freqmax + 0x3fff) >> (14 - AFMT_BYTESSHIFT(u->format));
1375                 bufsz = DESCFRAMES * maxsze;
1376                 if (u->durb[0].urb->transfer_buffer)
1377                         kfree(u->durb[0].urb->transfer_buffer);
1378                 u->durb[0].urb->transfer_buffer = kmalloc(bufsz, GFP_KERNEL);
1379                 u->durb[0].urb->transfer_buffer_length = bufsz;
1380                 if (u->durb[1].urb->transfer_buffer)
1381                         kfree(u->durb[1].urb->transfer_buffer);
1382                 u->durb[1].urb->transfer_buffer = kmalloc(bufsz, GFP_KERNEL);
1383                 u->durb[1].urb->transfer_buffer_length = bufsz;
1384                 if (u->syncpipe) {
1385                         if (u->surb[0].urb->transfer_buffer)
1386                                 kfree(u->surb[0].urb->transfer_buffer);
1387                         u->surb[0].urb->transfer_buffer = kmalloc(3*SYNCFRAMES, GFP_KERNEL);
1388                         u->surb[0].urb->transfer_buffer_length = 3*SYNCFRAMES;
1389                         if (u->surb[1].urb->transfer_buffer)
1390                                 kfree(u->surb[1].urb->transfer_buffer);
1391                         u->surb[1].urb->transfer_buffer = kmalloc(3*SYNCFRAMES, GFP_KERNEL);
1392                         u->surb[1].urb->transfer_buffer_length = 3*SYNCFRAMES;
1393                 }
1394                 if (!u->durb[0].urb->transfer_buffer || !u->durb[1].urb->transfer_buffer ||
1395                     (u->syncpipe && (!u->surb[0].urb->transfer_buffer || !u->surb[1].urb->transfer_buffer))) {
1396                         printk(KERN_ERR "usbaudio: cannot start playback device %d\n", dev->devnum);
1397                         return 0;
1398                 }
1399                 spin_lock_irqsave(&as->lock, flags);
1400         }
1401         if (u->dma.count <= 0 && !u->dma.mapped) {
1402                 spin_unlock_irqrestore(&as->lock, flags);
1403                 return 0;
1404         }
1405         u->flags |= FLG_RUNNING;
1406         if (!(u->flags & FLG_URB0RUNNING)) {
1407                 urb = u->durb[0].urb;
1408                 urb->dev = dev;
1409                 urb->pipe = u->datapipe;
1410                 urb->transfer_flags = URB_ISO_ASAP;
1411                 urb->number_of_packets = DESCFRAMES;
1412                 urb->context = as;
1413                 urb->complete = usbout_completed;
1414                 if (!usbout_prepare_desc(u, urb) && !usb_submit_urb(urb, GFP_ATOMIC))
1415                         u->flags |= FLG_URB0RUNNING;
1416                 else
1417                         u->flags &= ~FLG_RUNNING;
1418         }
1419         if (u->flags & FLG_RUNNING && !(u->flags & FLG_URB1RUNNING)) {
1420                 urb = u->durb[1].urb;
1421                 urb->dev = dev;
1422                 urb->pipe = u->datapipe;
1423                 urb->transfer_flags = URB_ISO_ASAP;
1424                 urb->number_of_packets = DESCFRAMES;
1425                 urb->context = as;
1426                 urb->complete = usbout_completed;
1427                 if (!usbout_prepare_desc(u, urb) && !usb_submit_urb(urb, GFP_ATOMIC))
1428                         u->flags |= FLG_URB1RUNNING;
1429                 else
1430                         u->flags &= ~FLG_RUNNING;
1431         }
1432         if (u->syncpipe) {
1433                 if (u->flags & FLG_RUNNING && !(u->flags & FLG_SYNC0RUNNING)) {
1434                         urb = u->surb[0].urb;
1435                         urb->dev = dev;
1436                         urb->pipe = u->syncpipe;
1437                         urb->transfer_flags = URB_ISO_ASAP;
1438                         urb->number_of_packets = SYNCFRAMES;
1439                         urb->context = as;
1440                         urb->complete = usbout_sync_completed;
1441                         /* stride: u->syncinterval */
1442                         if (!usbout_sync_prepare_desc(u, urb) && !usb_submit_urb(urb, GFP_ATOMIC))
1443                                 u->flags |= FLG_SYNC0RUNNING;
1444                         else
1445                                 u->flags &= ~FLG_RUNNING;
1446                 }
1447                 if (u->flags & FLG_RUNNING && !(u->flags & FLG_SYNC1RUNNING)) {
1448                         urb = u->surb[1].urb;
1449                         urb->dev = dev;
1450                         urb->pipe = u->syncpipe;
1451                         urb->transfer_flags = URB_ISO_ASAP;
1452                         urb->number_of_packets = SYNCFRAMES;
1453                         urb->context = as;
1454                         urb->complete = usbout_sync_completed;
1455                         /* stride: u->syncinterval */
1456                         if (!usbout_sync_prepare_desc(u, urb) && !usb_submit_urb(urb, GFP_ATOMIC))
1457                                 u->flags |= FLG_SYNC1RUNNING;
1458                         else
1459                                 u->flags &= ~FLG_RUNNING;
1460                 }
1461         }
1462         spin_unlock_irqrestore(&as->lock, flags);
1463         return 0;
1464 }
1465
1466 /* --------------------------------------------------------------------- */
1467
1468 static unsigned int format_goodness(struct audioformat *afp, unsigned int fmt, unsigned int srate)
1469 {
1470         unsigned int g = 0;
1471
1472         if (srate < afp->sratelo)
1473                 g += afp->sratelo - srate;
1474         if (srate > afp->sratehi)
1475                 g += srate - afp->sratehi;
1476         if (AFMT_ISSTEREO(afp->format) && !AFMT_ISSTEREO(fmt))
1477                 g += 0x100000;
1478         if (!AFMT_ISSTEREO(afp->format) && AFMT_ISSTEREO(fmt))
1479                 g += 0x400000;
1480         if (AFMT_IS16BIT(afp->format) && !AFMT_IS16BIT(fmt))
1481                 g += 0x100000;
1482         if (!AFMT_IS16BIT(afp->format) && AFMT_IS16BIT(fmt))
1483                 g += 0x400000;
1484         return g;
1485 }
1486
1487 static int find_format(struct audioformat *afp, unsigned int nr, unsigned int fmt, unsigned int srate)
1488 {
1489         unsigned int i, g, gb = ~0;
1490         int j = -1; /* default to failure */
1491
1492         /* find "best" format (according to format_goodness) */
1493         for (i = 0; i < nr; i++) {
1494                 g = format_goodness(&afp[i], fmt, srate);
1495                 if (g >= gb)
1496                         continue;
1497                 j = i;
1498                 gb = g;
1499         }
1500         return j;
1501 }
1502
1503 static int set_format_in(struct usb_audiodev *as)
1504 {
1505         struct usb_device *dev = as->state->usbdev;
1506         struct usb_host_interface *alts;
1507         struct usb_interface *iface;
1508         struct usbin *u = &as->usbin;
1509         struct dmabuf *d = &u->dma;
1510         struct audioformat *fmt;
1511         unsigned int ep;
1512         unsigned char data[3];
1513         int fmtnr, ret;
1514
1515         iface = usb_ifnum_to_if(dev, u->interface);
1516         if (!iface)
1517                 return 0;
1518
1519         fmtnr = find_format(as->fmtin, as->numfmtin, d->format, d->srate);
1520         if (fmtnr < 0) {
1521                 printk(KERN_ERR "usbaudio: set_format_in(): failed to find desired format/speed combination.\n");
1522                 return -1;
1523         }
1524
1525         fmt = as->fmtin + fmtnr;
1526         alts = usb_altnum_to_altsetting(iface, fmt->altsetting);
1527         u->format = fmt->format;
1528         u->datapipe = usb_rcvisocpipe(dev, alts->endpoint[0].desc.bEndpointAddress & 0xf);
1529         u->syncpipe = u->syncinterval = 0;
1530         if ((alts->endpoint[0].desc.bmAttributes & 0x0c) == 0x08) {
1531                 if (alts->desc.bNumEndpoints < 2 ||
1532                     alts->endpoint[1].desc.bmAttributes != 0x01 ||
1533                     alts->endpoint[1].desc.bSynchAddress != 0 ||
1534                     alts->endpoint[1].desc.bEndpointAddress != (alts->endpoint[0].desc.bSynchAddress & 0x7f)) {
1535                         printk(KERN_WARNING "usbaudio: device %d interface %d altsetting %d claims adaptive in "
1536                                "but has invalid synch pipe; treating as asynchronous in\n",
1537                                dev->devnum, u->interface, fmt->altsetting);
1538                 } else {
1539                         u->syncpipe = usb_sndisocpipe(dev, alts->endpoint[1].desc.bEndpointAddress & 0xf);
1540                         u->syncinterval = alts->endpoint[1].desc.bRefresh;
1541                 }
1542         }
1543         if (d->srate < fmt->sratelo)
1544                 d->srate = fmt->sratelo;
1545         if (d->srate > fmt->sratehi)
1546                 d->srate = fmt->sratehi;
1547         dprintk((KERN_DEBUG "usbaudio: set_format_in: usb_set_interface %u %u\n",
1548                         u->interface, fmt->altsetting));
1549         if (usb_set_interface(dev, alts->desc.bInterfaceNumber, fmt->altsetting) < 0) {
1550                 printk(KERN_WARNING "usbaudio: usb_set_interface failed, device %d interface %d altsetting %d\n",
1551                        dev->devnum, u->interface, fmt->altsetting);
1552                 return -1;
1553         }
1554         if (fmt->sratelo == fmt->sratehi)
1555                 return 0;
1556         ep = usb_pipeendpoint(u->datapipe) | (u->datapipe & USB_DIR_IN);
1557         /* if endpoint has pitch control, enable it */
1558         if (fmt->attributes & 0x02) {
1559                 data[0] = 1;
1560                 if ((ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
1561                                            PITCH_CONTROL << 8, ep, data, 1, HZ)) < 0) {
1562                         printk(KERN_ERR "usbaudio: failure (error %d) to set output pitch control device %d interface %u endpoint 0x%x to %u\n",
1563                                ret, dev->devnum, u->interface, ep, d->srate);
1564                         return -1;
1565                 }
1566         }
1567         /* if endpoint has sampling rate control, set it */
1568         if (fmt->attributes & 0x01) {
1569                 data[0] = d->srate;
1570                 data[1] = d->srate >> 8;
1571                 data[2] = d->srate >> 16;
1572                 if ((ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
1573                                            SAMPLING_FREQ_CONTROL << 8, ep, data, 3, HZ)) < 0) {
1574                         printk(KERN_ERR "usbaudio: failure (error %d) to set input sampling frequency device %d interface %u endpoint 0x%x to %u\n",
1575                                ret, dev->devnum, u->interface, ep, d->srate);
1576                         return -1;
1577                 }
1578                 if ((ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_IN,
1579                                            SAMPLING_FREQ_CONTROL << 8, ep, data, 3, HZ)) < 0) {
1580                         printk(KERN_ERR "usbaudio: failure (error %d) to get input sampling frequency device %d interface %u endpoint 0x%x\n",
1581                                ret, dev->devnum, u->interface, ep);
1582                         return -1;
1583                 }
1584                 dprintk((KERN_DEBUG "usbaudio: set_format_in: device %d interface %d altsetting %d srate req: %u real %u\n",
1585                         dev->devnum, u->interface, fmt->altsetting, d->srate, data[0] | (data[1] << 8) | (data[2] << 16)));
1586                 d->srate = data[0] | (data[1] << 8) | (data[2] << 16);
1587         }
1588         dprintk((KERN_DEBUG "usbaudio: set_format_in: USB format 0x%x, DMA format 0x%x srate %u\n", u->format, d->format, d->srate));
1589         return 0;
1590 }
1591
1592 static int set_format_out(struct usb_audiodev *as)
1593 {
1594         struct usb_device *dev = as->state->usbdev;
1595         struct usb_host_interface *alts;
1596         struct usb_interface *iface;
1597         struct usbout *u = &as->usbout;
1598         struct dmabuf *d = &u->dma;
1599         struct audioformat *fmt;
1600         unsigned int ep;
1601         unsigned char data[3];
1602         int fmtnr, ret;
1603
1604         iface = usb_ifnum_to_if(dev, u->interface);
1605         if (!iface)
1606                 return 0;
1607
1608         fmtnr = find_format(as->fmtout, as->numfmtout, d->format, d->srate);
1609         if (fmtnr < 0) {
1610                 printk(KERN_ERR "usbaudio: set_format_out(): failed to find desired format/speed combination.\n");
1611                 return -1;
1612         }
1613
1614         fmt = as->fmtout + fmtnr;
1615         u->format = fmt->format;
1616         alts = usb_altnum_to_altsetting(iface, fmt->altsetting);
1617         u->datapipe = usb_sndisocpipe(dev, alts->endpoint[0].desc.bEndpointAddress & 0xf);
1618         u->syncpipe = u->syncinterval = 0;
1619         if ((alts->endpoint[0].desc.bmAttributes & 0x0c) == 0x04) {
1620 #if 0
1621                 printk(KERN_DEBUG "bNumEndpoints 0x%02x endpoint[1].bmAttributes 0x%02x\n"
1622                        KERN_DEBUG "endpoint[1].bSynchAddress 0x%02x endpoint[1].bEndpointAddress 0x%02x\n"
1623                        KERN_DEBUG "endpoint[0].bSynchAddress 0x%02x\n", alts->bNumEndpoints,
1624                        alts->endpoint[1].bmAttributes, alts->endpoint[1].bSynchAddress,
1625                        alts->endpoint[1].bEndpointAddress, alts->endpoint[0].bSynchAddress);
1626 #endif
1627                 if (alts->desc.bNumEndpoints < 2 ||
1628                     alts->endpoint[1].desc.bmAttributes != 0x01 ||
1629                     alts->endpoint[1].desc.bSynchAddress != 0 ||
1630                     alts->endpoint[1].desc.bEndpointAddress != (alts->endpoint[0].desc.bSynchAddress | 0x80)) {
1631                         printk(KERN_WARNING "usbaudio: device %d interface %d altsetting %d claims asynch out "
1632                                "but has invalid synch pipe; treating as adaptive out\n",
1633                                dev->devnum, u->interface, fmt->altsetting);
1634                 } else {
1635                         u->syncpipe = usb_rcvisocpipe(dev, alts->endpoint[1].desc.bEndpointAddress & 0xf);
1636                         u->syncinterval = alts->endpoint[1].desc.bRefresh;
1637                 }
1638         }
1639         if (d->srate < fmt->sratelo)
1640                 d->srate = fmt->sratelo;
1641         if (d->srate > fmt->sratehi)
1642                 d->srate = fmt->sratehi;
1643         dprintk((KERN_DEBUG "usbaudio: set_format_out: usb_set_interface %u %u\n",
1644                         u->interface, fmt->altsetting));
1645         if (usb_set_interface(dev, u->interface, fmt->altsetting) < 0) {
1646                 printk(KERN_WARNING "usbaudio: usb_set_interface failed, device %d interface %d altsetting %d\n",
1647                        dev->devnum, u->interface, fmt->altsetting);
1648                 return -1;
1649         }
1650         if (fmt->sratelo == fmt->sratehi)
1651                 return 0;
1652         ep = usb_pipeendpoint(u->datapipe) | (u->datapipe & USB_DIR_IN);
1653         /* if endpoint has pitch control, enable it */
1654         if (fmt->attributes & 0x02) {
1655                 data[0] = 1;
1656                 if ((ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
1657                                            PITCH_CONTROL << 8, ep, data, 1, HZ)) < 0) {
1658                         printk(KERN_ERR "usbaudio: failure (error %d) to set output pitch control device %d interface %u endpoint 0x%x to %u\n",
1659                                ret, dev->devnum, u->interface, ep, d->srate);
1660                         return -1;
1661                 }
1662         }
1663         /* if endpoint has sampling rate control, set it */
1664         if (fmt->attributes & 0x01) {
1665                 data[0] = d->srate;
1666                 data[1] = d->srate >> 8;
1667                 data[2] = d->srate >> 16;
1668                 if ((ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
1669                                            SAMPLING_FREQ_CONTROL << 8, ep, data, 3, HZ)) < 0) {
1670                         printk(KERN_ERR "usbaudio: failure (error %d) to set output sampling frequency device %d interface %u endpoint 0x%x to %u\n",
1671                                ret, dev->devnum, u->interface, ep, d->srate);
1672                         return -1;
1673                 }
1674                 if ((ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_IN,
1675                                            SAMPLING_FREQ_CONTROL << 8, ep, data, 3, HZ)) < 0) {
1676                         printk(KERN_ERR "usbaudio: failure (error %d) to get output sampling frequency device %d interface %u endpoint 0x%x\n",
1677                                ret, dev->devnum, u->interface, ep);
1678                         return -1;
1679                 }
1680                 dprintk((KERN_DEBUG "usbaudio: set_format_out: device %d interface %d altsetting %d srate req: %u real %u\n",
1681                         dev->devnum, u->interface, fmt->altsetting, d->srate, data[0] | (data[1] << 8) | (data[2] << 16)));
1682                 d->srate = data[0] | (data[1] << 8) | (data[2] << 16);
1683         }
1684         dprintk((KERN_DEBUG "usbaudio: set_format_out: USB format 0x%x, DMA format 0x%x srate %u\n", u->format, d->format, d->srate));
1685         return 0;
1686 }
1687
1688 static int set_format(struct usb_audiodev *s, unsigned int fmode, unsigned int fmt, unsigned int srate)
1689 {
1690         int ret1 = 0, ret2 = 0;
1691
1692         if (!(fmode & (FMODE_READ|FMODE_WRITE)))
1693                 return -EINVAL;
1694         if (fmode & FMODE_READ) {
1695                 usbin_stop(s);
1696                 s->usbin.dma.ready = 0;
1697                 if (fmt == AFMT_QUERY)
1698                         fmt = s->usbin.dma.format;
1699                 else
1700                         s->usbin.dma.format = fmt;
1701                 if (!srate)
1702                         srate = s->usbin.dma.srate;
1703                 else
1704                         s->usbin.dma.srate = srate;
1705         }
1706         if (fmode & FMODE_WRITE) {
1707                 usbout_stop(s);
1708                 s->usbout.dma.ready = 0;
1709                 if (fmt == AFMT_QUERY)
1710                         fmt = s->usbout.dma.format;
1711                 else
1712                         s->usbout.dma.format = fmt;
1713                 if (!srate)
1714                         srate = s->usbout.dma.srate;
1715                 else
1716                         s->usbout.dma.srate = srate;
1717         }
1718         if (fmode & FMODE_READ)
1719                 ret1 = set_format_in(s);
1720         if (fmode & FMODE_WRITE)
1721                 ret2 = set_format_out(s);
1722         return ret1 ? ret1 : ret2;
1723 }
1724
1725 /* --------------------------------------------------------------------- */
1726
1727 static int wrmixer(struct usb_mixerdev *ms, unsigned mixch, unsigned value)
1728 {
1729         struct usb_device *dev = ms->state->usbdev;
1730         unsigned char data[2];
1731         struct mixerchannel *ch;
1732         int v1, v2, v3;
1733
1734         if (mixch >= ms->numch)
1735                 return -1;
1736         ch = &ms->ch[mixch];
1737         v3 = ch->maxval - ch->minval;
1738         v1 = value & 0xff;
1739         v2 = (value >> 8) & 0xff;
1740         if (v1 > 100)
1741                 v1 = 100;
1742         if (v2 > 100)
1743                 v2 = 100;
1744         if (!(ch->flags & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT)))
1745                 v2 = v1;
1746         ch->value = v1 | (v2 << 8);
1747         v1 = (v1 * v3) / 100 + ch->minval;
1748         v2 = (v2 * v3) / 100 + ch->minval;
1749         switch (ch->selector) {
1750         case 0:  /* mixer unit request */
1751                 data[0] = v1;
1752                 data[1] = v1 >> 8;
1753                 if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
1754                                     (ch->chnum << 8) | 1, ms->iface | (ch->unitid << 8), data, 2, HZ) < 0)
1755                         goto err;
1756                 if (!(ch->flags & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT)))
1757                         return 0;
1758                 data[0] = v2;
1759                 data[1] = v2 >> 8;
1760                 if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
1761                                     ((ch->chnum + !!(ch->flags & MIXFLG_STEREOIN)) << 8) | (1 + !!(ch->flags & MIXFLG_STEREOOUT)),
1762                                     ms->iface | (ch->unitid << 8), data, 2, HZ) < 0)
1763                         goto err;
1764                 return 0;
1765
1766                 /* various feature unit controls */
1767         case VOLUME_CONTROL:
1768                 data[0] = v1;
1769                 data[1] = v1 >> 8;
1770                 if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
1771                                     (ch->selector << 8) | ch->chnum, ms->iface | (ch->unitid << 8), data, 2, HZ) < 0)
1772                         goto err;
1773                 if (!(ch->flags & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT)))
1774                         return 0;
1775                 data[0] = v2;
1776                 data[1] = v2 >> 8;
1777                 if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
1778                                     (ch->selector << 8) | (ch->chnum + 1), ms->iface | (ch->unitid << 8), data, 2, HZ) < 0)
1779                         goto err;
1780                 return 0;
1781
1782         case BASS_CONTROL:
1783         case MID_CONTROL:
1784         case TREBLE_CONTROL:
1785                 data[0] = v1 >> 8;
1786                 if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
1787                                     (ch->selector << 8) | ch->chnum, ms->iface | (ch->unitid << 8), data, 1, HZ) < 0)
1788                         goto err;
1789                 if (!(ch->flags & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT)))
1790                         return 0;
1791                 data[0] = v2 >> 8;
1792                 if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
1793                                     (ch->selector << 8) | (ch->chnum + 1), ms->iface | (ch->unitid << 8), data, 1, HZ) < 0)
1794                         goto err;
1795                 return 0;
1796
1797         default:
1798                 return -1;
1799         }
1800         return 0;
1801
1802  err:
1803         printk(KERN_ERR "usbaudio: mixer request device %u if %u unit %u ch %u selector %u failed\n",
1804                 dev->devnum, ms->iface, ch->unitid, ch->chnum, ch->selector);
1805         return -1;
1806 }
1807
1808 static int get_rec_src(struct usb_mixerdev *ms)
1809 {
1810         struct usb_device *dev = ms->state->usbdev;
1811         unsigned int mask = 0, retmask = 0;
1812         unsigned int i, j;
1813         unsigned char buf;
1814         int err = 0;
1815
1816         for (i = 0; i < ms->numch; i++) {
1817                 if (!ms->ch[i].slctunitid || (mask & (1 << i)))
1818                         continue;
1819                 if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
1820                                     0, ms->iface | (ms->ch[i].slctunitid << 8), &buf, 1, HZ) < 0) {
1821                         err = -EIO;
1822                         printk(KERN_ERR "usbaudio: selector read request device %u if %u unit %u failed\n",
1823                                dev->devnum, ms->iface, ms->ch[i].slctunitid & 0xff);
1824                         continue;
1825                 }
1826                 for (j = i; j < ms->numch; j++) {
1827                         if ((ms->ch[i].slctunitid ^ ms->ch[j].slctunitid) & 0xff)
1828                                 continue;
1829                         mask |= 1 << j;
1830                         if (buf == (ms->ch[j].slctunitid >> 8))
1831                                 retmask |= 1 << ms->ch[j].osschannel;
1832                 }
1833         }
1834         if (err)
1835                 return -EIO;
1836         return retmask;
1837 }
1838
1839 static int set_rec_src(struct usb_mixerdev *ms, int srcmask)
1840 {
1841         struct usb_device *dev = ms->state->usbdev;
1842         unsigned int mask = 0, smask, bmask;
1843         unsigned int i, j;
1844         unsigned char buf;
1845         int err = 0;
1846
1847         for (i = 0; i < ms->numch; i++) {
1848                 if (!ms->ch[i].slctunitid || (mask & (1 << i)))
1849                         continue;
1850                 if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
1851                                     0, ms->iface | (ms->ch[i].slctunitid << 8), &buf, 1, HZ) < 0) {
1852                         err = -EIO;
1853                         printk(KERN_ERR "usbaudio: selector read request device %u if %u unit %u failed\n",
1854                                dev->devnum, ms->iface, ms->ch[i].slctunitid & 0xff);
1855                         continue;
1856                 }
1857                 /* first generate smask */
1858                 smask = bmask = 0;
1859                 for (j = i; j < ms->numch; j++) {
1860                         if ((ms->ch[i].slctunitid ^ ms->ch[j].slctunitid) & 0xff)
1861                                 continue;
1862                         smask |= 1 << ms->ch[j].osschannel;
1863                         if (buf == (ms->ch[j].slctunitid >> 8))
1864                                 bmask |= 1 << ms->ch[j].osschannel;
1865                         mask |= 1 << j;
1866                 }
1867                 /* check for multiple set sources */
1868                 j = hweight32(srcmask & smask);
1869                 if (j == 0)
1870                         continue;
1871                 if (j > 1)
1872                         srcmask &= ~bmask;
1873                 for (j = i; j < ms->numch; j++) {
1874                         if ((ms->ch[i].slctunitid ^ ms->ch[j].slctunitid) & 0xff)
1875                                 continue;
1876                         if (!(srcmask & (1 << ms->ch[j].osschannel)))
1877                                 continue;
1878                         buf = ms->ch[j].slctunitid >> 8;
1879                         if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
1880                                     0, ms->iface | (ms->ch[j].slctunitid << 8), &buf, 1, HZ) < 0) {
1881                                 err = -EIO;
1882                                 printk(KERN_ERR "usbaudio: selector write request device %u if %u unit %u failed\n",
1883                                        dev->devnum, ms->iface, ms->ch[j].slctunitid & 0xff);
1884                                 continue;
1885                         }
1886                 }
1887         }
1888         return err ? -EIO : 0;
1889 }
1890
1891 /* --------------------------------------------------------------------- */
1892
1893 /*
1894  * should be called with open_sem hold, so that no new processes
1895  * look at the audio device to be destroyed
1896  */
1897
1898 static void release(struct usb_audio_state *s)
1899 {
1900         struct usb_audiodev *as;
1901         struct usb_mixerdev *ms;
1902
1903         s->count--;
1904         if (s->count) {
1905                 up(&open_sem);
1906                 return;
1907         }
1908         up(&open_sem);
1909         wake_up(&open_wait);
1910         while (!list_empty(&s->audiolist)) {
1911                 as = list_entry(s->audiolist.next, struct usb_audiodev, list);
1912                 list_del(&as->list);
1913                 usbin_release(as);
1914                 usbout_release(as);
1915                 dmabuf_release(&as->usbin.dma);
1916                 dmabuf_release(&as->usbout.dma);
1917                 usb_free_urb(as->usbin.durb[0].urb);
1918                 usb_free_urb(as->usbin.durb[1].urb);
1919                 usb_free_urb(as->usbin.surb[0].urb);
1920                 usb_free_urb(as->usbin.surb[1].urb);
1921                 usb_free_urb(as->usbout.durb[0].urb);
1922                 usb_free_urb(as->usbout.durb[1].urb);
1923                 usb_free_urb(as->usbout.surb[0].urb);
1924                 usb_free_urb(as->usbout.surb[1].urb);
1925                 kfree(as);
1926         }
1927         while (!list_empty(&s->mixerlist)) {
1928                 ms = list_entry(s->mixerlist.next, struct usb_mixerdev, list);
1929                 list_del(&ms->list);
1930                 kfree(ms);
1931         }
1932         kfree(s);
1933 }
1934
1935 static inline int prog_dmabuf_in(struct usb_audiodev *as)
1936 {
1937         usbin_stop(as);
1938         return dmabuf_init(&as->usbin.dma);
1939 }
1940
1941 static inline int prog_dmabuf_out(struct usb_audiodev *as)
1942 {
1943         usbout_stop(as);
1944         return dmabuf_init(&as->usbout.dma);
1945 }
1946
1947 /* --------------------------------------------------------------------- */
1948
1949 static int usb_audio_open_mixdev(struct inode *inode, struct file *file)
1950 {
1951         unsigned int minor = iminor(inode);
1952         struct list_head *devs, *mdevs;
1953         struct usb_mixerdev *ms;
1954         struct usb_audio_state *s;
1955
1956         down(&open_sem);
1957         for (devs = audiodevs.next; devs != &audiodevs; devs = devs->next) {
1958                 s = list_entry(devs, struct usb_audio_state, audiodev);
1959                 for (mdevs = s->mixerlist.next; mdevs != &s->mixerlist; mdevs = mdevs->next) {
1960                         ms = list_entry(mdevs, struct usb_mixerdev, list);
1961                         if (ms->dev_mixer == minor)
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 list_head *devs, *adevs;
2638         struct usb_audiodev *as;
2639         struct usb_audio_state *s;
2640
2641         for (;;) {
2642                 down(&open_sem);
2643                 for (devs = audiodevs.next; devs != &audiodevs; devs = devs->next) {
2644                         s = list_entry(devs, struct usb_audio_state, audiodev);
2645                         for (adevs = s->audiolist.next; adevs != &s->audiolist; adevs = adevs->next) {
2646                                 as = list_entry(adevs, struct usb_audiodev, list);
2647                                 if (!((as->dev_audio ^ minor) & ~0xf))
2648                                         goto device_found;
2649                         }
2650                 }
2651                 up(&open_sem);
2652                 return -ENODEV;
2653
2654         device_found:
2655                 if (!s->usbdev) {
2656                         up(&open_sem);
2657                         return -EIO;
2658                 }
2659                 /* wait for device to become free */
2660                 if (!(as->open_mode & file->f_mode))
2661                         break;
2662                 if (file->f_flags & O_NONBLOCK) {
2663                         up(&open_sem);
2664                         return -EBUSY;
2665                 }
2666                 __set_current_state(TASK_INTERRUPTIBLE);
2667                 add_wait_queue(&open_wait, &wait);
2668                 up(&open_sem);
2669                 schedule();
2670                 __set_current_state(TASK_RUNNING);
2671                 remove_wait_queue(&open_wait, &wait);
2672                 if (signal_pending(current))
2673                         return -ERESTARTSYS;
2674         }
2675         if (file->f_mode & FMODE_READ)
2676                 as->usbin.dma.ossfragshift = as->usbin.dma.ossmaxfrags = as->usbin.dma.subdivision = 0;
2677         if (file->f_mode & FMODE_WRITE)
2678                 as->usbout.dma.ossfragshift = as->usbout.dma.ossmaxfrags = as->usbout.dma.subdivision = 0;
2679         if (set_format(as, file->f_mode, ((minor & 0xf) == SND_DEV_DSP16) ? AFMT_S16_LE : AFMT_U8 /* AFMT_ULAW */, 8000)) {
2680                 up(&open_sem);
2681                 return -EIO;
2682         }
2683         file->private_data = as;
2684         as->open_mode |= file->f_mode & (FMODE_READ | FMODE_WRITE);
2685         s->count++;
2686         up(&open_sem);
2687         return nonseekable_open(inode, file);
2688 }
2689
2690 static int usb_audio_release(struct inode *inode, struct file *file)
2691 {
2692         struct usb_audiodev *as = (struct usb_audiodev *)file->private_data;
2693         struct usb_audio_state *s;
2694         struct usb_device *dev;
2695
2696         lock_kernel();
2697         s = as->state;
2698         dev = s->usbdev;
2699         if (file->f_mode & FMODE_WRITE)
2700                 drain_out(as, file->f_flags & O_NONBLOCK);
2701         down(&open_sem);
2702         if (file->f_mode & FMODE_WRITE) {
2703                 usbout_stop(as);
2704                 if (dev && as->usbout.interface >= 0)
2705                         usb_set_interface(dev, as->usbout.interface, 0);
2706                 dmabuf_release(&as->usbout.dma);
2707                 usbout_release(as);
2708         }
2709         if (file->f_mode & FMODE_READ) {
2710                 usbin_stop(as);
2711                 if (dev && as->usbin.interface >= 0)
2712                         usb_set_interface(dev, as->usbin.interface, 0);
2713                 dmabuf_release(&as->usbin.dma);
2714                 usbin_release(as);
2715         }
2716         as->open_mode &= (~file->f_mode) & (FMODE_READ|FMODE_WRITE);
2717         release(s);
2718         wake_up(&open_wait);
2719         unlock_kernel();
2720         return 0;
2721 }
2722
2723 static /*const*/ struct file_operations usb_audio_fops = {
2724         .owner =        THIS_MODULE,
2725         .llseek =       no_llseek,
2726         .read =         usb_audio_read,
2727         .write =        usb_audio_write,
2728         .poll =         usb_audio_poll,
2729         .ioctl =        usb_audio_ioctl,
2730         .mmap =         usb_audio_mmap,
2731         .open =         usb_audio_open,
2732         .release =      usb_audio_release,
2733 };
2734
2735 /* --------------------------------------------------------------------- */
2736
2737 static int usb_audio_probe(struct usb_interface *iface,
2738                            const struct usb_device_id *id);
2739 static void usb_audio_disconnect(struct usb_interface *iface);
2740
2741 static struct usb_device_id usb_audio_ids [] = {
2742     { .match_flags = (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS),
2743       .bInterfaceClass = USB_CLASS_AUDIO, .bInterfaceSubClass = 1},
2744     { }                                         /* Terminating entry */
2745 };
2746
2747 MODULE_DEVICE_TABLE (usb, usb_audio_ids);
2748
2749 static struct usb_driver usb_audio_driver = {
2750         .owner =        THIS_MODULE,
2751         .name =         "audio",
2752         .probe =        usb_audio_probe,
2753         .disconnect =   usb_audio_disconnect,
2754         .id_table =     usb_audio_ids,
2755 };
2756
2757 static void *find_descriptor(void *descstart, unsigned int desclen, void *after,
2758                              u8 dtype, int iface, int altsetting)
2759 {
2760         u8 *p, *end, *next;
2761         int ifc = -1, as = -1;
2762
2763         p = descstart;
2764         end = p + desclen;
2765         for (; p < end;) {
2766                 if (p[0] < 2)
2767                         return NULL;
2768                 next = p + p[0];
2769                 if (next > end)
2770                         return NULL;
2771                 if (p[1] == USB_DT_INTERFACE) {
2772                         /* minimum length of interface descriptor */
2773                         if (p[0] < 9)
2774                                 return NULL;
2775                         ifc = p[2];
2776                         as = p[3];
2777                 }
2778                 if (p[1] == dtype && (!after || (void *)p > after) &&
2779                     (iface == -1 || iface == ifc) && (altsetting == -1 || altsetting == as)) {
2780                         return p;
2781                 }
2782                 p = next;
2783         }
2784         return NULL;
2785 }
2786
2787 static void *find_csinterface_descriptor(void *descstart, unsigned int desclen, void *after, u8 dsubtype, int iface, int altsetting)
2788 {
2789         unsigned char *p;
2790
2791         p = find_descriptor(descstart, desclen, after, USB_DT_CS_INTERFACE, iface, altsetting);
2792         while (p) {
2793                 if (p[0] >= 3 && p[2] == dsubtype)
2794                         return p;
2795                 p = find_descriptor(descstart, desclen, p, USB_DT_CS_INTERFACE, iface, altsetting);
2796         }
2797         return NULL;
2798 }
2799
2800 static void *find_audiocontrol_unit(void *descstart, unsigned int desclen, void *after, u8 unit, int iface)
2801 {
2802         unsigned char *p;
2803
2804         p = find_descriptor(descstart, desclen, after, USB_DT_CS_INTERFACE, iface, -1);
2805         while (p) {
2806                 if (p[0] >= 4 && p[2] >= INPUT_TERMINAL && p[2] <= EXTENSION_UNIT && p[3] == unit)
2807                         return p;
2808                 p = find_descriptor(descstart, desclen, p, USB_DT_CS_INTERFACE, iface, -1);
2809         }
2810         return NULL;
2811 }
2812
2813 static void usb_audio_parsestreaming(struct usb_audio_state *s, unsigned char *buffer, unsigned int buflen, int asifin, int asifout)
2814 {
2815         struct usb_device *dev = s->usbdev;
2816         struct usb_audiodev *as;
2817         struct usb_host_interface *alts;
2818         struct usb_interface *iface;
2819         struct audioformat *fp;
2820         unsigned char *fmt, *csep;
2821         unsigned int i, j, k, format, idx;
2822
2823         if (!(as = kmalloc(sizeof(struct usb_audiodev), GFP_KERNEL)))
2824                 return;
2825         memset(as, 0, sizeof(struct usb_audiodev));
2826         init_waitqueue_head(&as->usbin.dma.wait);
2827         init_waitqueue_head(&as->usbout.dma.wait);
2828         spin_lock_init(&as->lock);
2829         as->usbin.durb[0].urb = usb_alloc_urb (DESCFRAMES, GFP_KERNEL);
2830         as->usbin.durb[1].urb = usb_alloc_urb (DESCFRAMES, GFP_KERNEL);
2831         as->usbin.surb[0].urb = usb_alloc_urb (SYNCFRAMES, GFP_KERNEL);
2832         as->usbin.surb[1].urb = usb_alloc_urb (SYNCFRAMES, GFP_KERNEL);
2833         as->usbout.durb[0].urb = usb_alloc_urb (DESCFRAMES, GFP_KERNEL);
2834         as->usbout.durb[1].urb = usb_alloc_urb (DESCFRAMES, GFP_KERNEL);
2835         as->usbout.surb[0].urb = usb_alloc_urb (SYNCFRAMES, GFP_KERNEL);
2836         as->usbout.surb[1].urb = usb_alloc_urb (SYNCFRAMES, GFP_KERNEL);
2837         if ((!as->usbin.durb[0].urb) ||
2838             (!as->usbin.durb[1].urb) ||
2839             (!as->usbin.surb[0].urb) ||
2840             (!as->usbin.surb[1].urb) ||
2841             (!as->usbout.durb[0].urb) ||
2842             (!as->usbout.durb[1].urb) ||
2843             (!as->usbout.surb[0].urb) ||
2844             (!as->usbout.surb[1].urb)) {
2845                 usb_free_urb(as->usbin.durb[0].urb);
2846                 usb_free_urb(as->usbin.durb[1].urb);
2847                 usb_free_urb(as->usbin.surb[0].urb);
2848                 usb_free_urb(as->usbin.surb[1].urb);
2849                 usb_free_urb(as->usbout.durb[0].urb);
2850                 usb_free_urb(as->usbout.durb[1].urb);
2851                 usb_free_urb(as->usbout.surb[0].urb);
2852                 usb_free_urb(as->usbout.surb[1].urb);
2853                 kfree(as);
2854                 return;
2855         }
2856         as->state = s;
2857         as->usbin.interface = asifin;
2858         as->usbout.interface = asifout;
2859         /* search for input formats */
2860         if (asifin >= 0) {
2861                 as->usbin.flags = FLG_CONNECTED;
2862                 iface = usb_ifnum_to_if(dev, asifin);
2863                 for (idx = 0; idx < iface->num_altsetting; idx++) {
2864                         alts = &iface->altsetting[idx];
2865                         i = alts->desc.bAlternateSetting;
2866                         if (alts->desc.bInterfaceClass != USB_CLASS_AUDIO || alts->desc.bInterfaceSubClass != 2)
2867                                 continue;
2868                         if (alts->desc.bNumEndpoints < 1) {
2869                                 if (i != 0) {  /* altsetting 0 has no endpoints (Section B.3.4.1) */
2870                                         printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u does not have an endpoint\n",
2871                                                dev->devnum, asifin, i);
2872                                 }
2873                                 continue;
2874                         }
2875                         if ((alts->endpoint[0].desc.bmAttributes & 0x03) != 0x01 ||
2876                             !(alts->endpoint[0].desc.bEndpointAddress & 0x80)) {
2877                                 printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u first endpoint not isochronous in\n",
2878                                        dev->devnum, asifin, i);
2879                                 continue;
2880                         }
2881                         fmt = find_csinterface_descriptor(buffer, buflen, NULL, AS_GENERAL, asifin, i);
2882                         if (!fmt) {
2883                                 printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u FORMAT_TYPE descriptor not found\n",
2884                                        dev->devnum, asifin, i);
2885                                 continue;
2886                         }
2887                         if (fmt[0] < 7 || fmt[6] != 0 || (fmt[5] != 1 && fmt[5] != 2)) {
2888                                 printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u format not supported\n",
2889                                        dev->devnum, asifin, i);
2890                                 continue;
2891                         }
2892                         format = (fmt[5] == 2) ? (AFMT_U16_LE | AFMT_U8) : (AFMT_S16_LE | AFMT_S8);
2893                         fmt = find_csinterface_descriptor(buffer, buflen, NULL, FORMAT_TYPE, asifin, i);
2894                         if (!fmt) {
2895                                 printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u FORMAT_TYPE descriptor not found\n",
2896                                        dev->devnum, asifin, i);
2897                                 continue;
2898                         }
2899                         if (fmt[0] < 8+3*(fmt[7] ? fmt[7] : 2) || fmt[3] != 1) {
2900                                 printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u FORMAT_TYPE descriptor not supported\n",
2901                                        dev->devnum, asifin, i);
2902                                 continue;
2903                         }
2904                         if (fmt[4] < 1 || fmt[4] > 2 || fmt[5] < 1 || fmt[5] > 2) {
2905                                 printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u unsupported channels %u framesize %u\n",
2906                                        dev->devnum, asifin, i, fmt[4], fmt[5]);
2907                                 continue;
2908                         }
2909                         csep = find_descriptor(buffer, buflen, NULL, USB_DT_CS_ENDPOINT, asifin, i);
2910                         if (!csep || csep[0] < 7 || csep[2] != EP_GENERAL) {
2911                                 printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u no or invalid class specific endpoint descriptor\n",
2912                                        dev->devnum, asifin, i);
2913                                 continue;
2914                         }
2915                         if (as->numfmtin >= MAXFORMATS)
2916                                 continue;
2917                         fp = &as->fmtin[as->numfmtin++];
2918                         if (fmt[5] == 2)
2919                                 format &= (AFMT_U16_LE | AFMT_S16_LE);
2920                         else
2921                                 format &= (AFMT_U8 | AFMT_S8);
2922                         if (fmt[4] == 2)
2923                                 format |= AFMT_STEREO;
2924                         fp->format = format;
2925                         fp->altsetting = i;
2926                         fp->sratelo = fp->sratehi = fmt[8] | (fmt[9] << 8) | (fmt[10] << 16);
2927                         printk(KERN_INFO "usbaudio: valid input sample rate %u\n", fp->sratelo);
2928                         for (j = fmt[7] ? (fmt[7]-1) : 1; j > 0; j--) {
2929                                 k = fmt[8+3*j] | (fmt[9+3*j] << 8) | (fmt[10+3*j] << 16);
2930                                 printk(KERN_INFO "usbaudio: valid input sample rate %u\n", k);
2931                                 if (k > fp->sratehi)
2932                                         fp->sratehi = k;
2933                                 if (k < fp->sratelo)
2934                                         fp->sratelo = k;
2935                         }
2936                         fp->attributes = csep[3];
2937                         printk(KERN_INFO "usbaudio: device %u interface %u altsetting %u: format 0x%08x sratelo %u sratehi %u attributes 0x%02x\n",
2938                                dev->devnum, asifin, i, fp->format, fp->sratelo, fp->sratehi, fp->attributes);
2939                 }
2940         }
2941         /* search for output formats */
2942         if (asifout >= 0) {
2943                 as->usbout.flags = FLG_CONNECTED;
2944                 iface = usb_ifnum_to_if(dev, asifout);
2945                 for (idx = 0; idx < iface->num_altsetting; idx++) {
2946                         alts = &iface->altsetting[idx];
2947                         i = alts->desc.bAlternateSetting;
2948                         if (alts->desc.bInterfaceClass != USB_CLASS_AUDIO || alts->desc.bInterfaceSubClass != 2)
2949                                 continue;
2950                         if (alts->desc.bNumEndpoints < 1) {
2951                                 /* altsetting 0 should never have iso EPs */
2952                                 if (i != 0)
2953                                 printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u does not have an endpoint\n",
2954                                        dev->devnum, asifout, i);
2955                                 continue;
2956                         }
2957                         if ((alts->endpoint[0].desc.bmAttributes & 0x03) != 0x01 ||
2958                             (alts->endpoint[0].desc.bEndpointAddress & 0x80)) {
2959                                 printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u first endpoint not isochronous out\n",
2960                                        dev->devnum, asifout, i);
2961                                 continue;
2962                         }
2963                         /* See USB audio formats manual, section 2 */
2964                         fmt = find_csinterface_descriptor(buffer, buflen, NULL, AS_GENERAL, asifout, i);
2965                         if (!fmt) {
2966                                 printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u FORMAT_TYPE descriptor not found\n",
2967                                        dev->devnum, asifout, i);
2968                                 continue;
2969                         }
2970                         if (fmt[0] < 7 || fmt[6] != 0 || (fmt[5] != 1 && fmt[5] != 2)) {
2971                                 printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u format not supported\n",
2972                                        dev->devnum, asifout, i);
2973                                 continue;
2974                         }
2975                         format = (fmt[5] == 2) ? (AFMT_U16_LE | AFMT_U8) : (AFMT_S16_LE | AFMT_S8);
2976                         /* Dallas DS4201 workaround */
2977                         if (dev->descriptor.idVendor == 0x04fa && dev->descriptor.idProduct == 0x4201)
2978                                 format = (AFMT_S16_LE | AFMT_S8);
2979                         fmt = find_csinterface_descriptor(buffer, buflen, NULL, FORMAT_TYPE, asifout, i);
2980                         if (!fmt) {
2981                                 printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u FORMAT_TYPE descriptor not found\n",
2982                                        dev->devnum, asifout, i);
2983                                 continue;
2984                         }
2985                         if (fmt[0] < 8+3*(fmt[7] ? fmt[7] : 2) || fmt[3] != 1) {
2986                                 printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u FORMAT_TYPE descriptor not supported\n",
2987                                        dev->devnum, asifout, i);
2988                                 continue;
2989                         }
2990                         if (fmt[4] < 1 || fmt[4] > 2 || fmt[5] < 1 || fmt[5] > 2) {
2991                                 printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u unsupported channels %u framesize %u\n",
2992                                        dev->devnum, asifout, i, fmt[4], fmt[5]);
2993                                 continue;
2994                         }
2995                         csep = find_descriptor(buffer, buflen, NULL, USB_DT_CS_ENDPOINT, asifout, i);
2996                         if (!csep || csep[0] < 7 || csep[2] != EP_GENERAL) {
2997                                 printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u no or invalid class specific endpoint descriptor\n",
2998                                        dev->devnum, asifout, i);
2999                                 continue;
3000                         }
3001                         if (as->numfmtout >= MAXFORMATS)
3002                                 continue;
3003                         fp = &as->fmtout[as->numfmtout++];
3004                         if (fmt[5] == 2)
3005                                 format &= (AFMT_U16_LE | AFMT_S16_LE);
3006                         else
3007                                 format &= (AFMT_U8 | AFMT_S8);
3008                         if (fmt[4] == 2)
3009                                 format |= AFMT_STEREO;
3010                         fp->format = format;
3011                         fp->altsetting = i;
3012                         fp->sratelo = fp->sratehi = fmt[8] | (fmt[9] << 8) | (fmt[10] << 16);
3013                         printk(KERN_INFO "usbaudio: valid output sample rate %u\n", fp->sratelo);
3014                         for (j = fmt[7] ? (fmt[7]-1) : 1; j > 0; j--) {
3015                                 k = fmt[8+3*j] | (fmt[9+3*j] << 8) | (fmt[10+3*j] << 16);
3016                                 printk(KERN_INFO "usbaudio: valid output sample rate %u\n", k);
3017                                 if (k > fp->sratehi)
3018                                         fp->sratehi = k;
3019                                 if (k < fp->sratelo)
3020                                         fp->sratelo = k;
3021                         }
3022                         fp->attributes = csep[3];
3023                         printk(KERN_INFO "usbaudio: device %u interface %u altsetting %u: format 0x%08x sratelo %u sratehi %u attributes 0x%02x\n",
3024                                dev->devnum, asifout, i, fp->format, fp->sratelo, fp->sratehi, fp->attributes);
3025                 }
3026         }
3027         if (as->numfmtin == 0 && as->numfmtout == 0) {
3028                 usb_free_urb(as->usbin.durb[0].urb);
3029                 usb_free_urb(as->usbin.durb[1].urb);
3030                 usb_free_urb(as->usbin.surb[0].urb);
3031                 usb_free_urb(as->usbin.surb[1].urb);
3032                 usb_free_urb(as->usbout.durb[0].urb);
3033                 usb_free_urb(as->usbout.durb[1].urb);
3034                 usb_free_urb(as->usbout.surb[0].urb);
3035                 usb_free_urb(as->usbout.surb[1].urb);
3036                 kfree(as);
3037                 return;
3038         }
3039         if ((as->dev_audio = register_sound_dsp(&usb_audio_fops, -1)) < 0) {
3040                 printk(KERN_ERR "usbaudio: cannot register dsp\n");
3041                 usb_free_urb(as->usbin.durb[0].urb);
3042                 usb_free_urb(as->usbin.durb[1].urb);
3043                 usb_free_urb(as->usbin.surb[0].urb);
3044                 usb_free_urb(as->usbin.surb[1].urb);
3045                 usb_free_urb(as->usbout.durb[0].urb);
3046                 usb_free_urb(as->usbout.durb[1].urb);
3047                 usb_free_urb(as->usbout.surb[0].urb);
3048                 usb_free_urb(as->usbout.surb[1].urb);
3049                 kfree(as);
3050                 return;
3051         }
3052         printk(KERN_INFO "usbaudio: registered dsp 14,%d\n", as->dev_audio);
3053         /* everything successful */
3054         list_add_tail(&as->list, &s->audiolist);
3055 }
3056
3057 struct consmixstate {
3058         struct usb_audio_state *s;
3059         unsigned char *buffer;
3060         unsigned int buflen;
3061         unsigned int ctrlif;
3062         struct mixerchannel mixch[SOUND_MIXER_NRDEVICES];
3063         unsigned int nrmixch;
3064         unsigned int mixchmask;
3065         unsigned long unitbitmap[32/sizeof(unsigned long)];
3066         /* return values */
3067         unsigned int nrchannels;
3068         unsigned int termtype;
3069         unsigned int chconfig;
3070 };
3071
3072 static struct mixerchannel *getmixchannel(struct consmixstate *state, unsigned int nr)
3073 {
3074         struct mixerchannel *c;
3075
3076         if (nr >= SOUND_MIXER_NRDEVICES) {
3077                 printk(KERN_ERR "usbaudio: invalid OSS mixer channel %u\n", nr);
3078                 return NULL;
3079         }
3080         if (!(state->mixchmask & (1 << nr))) {
3081                 printk(KERN_WARNING "usbaudio: OSS mixer channel %u already in use\n", nr);
3082                 return NULL;
3083         }
3084         c = &state->mixch[state->nrmixch++];
3085         c->osschannel = nr;
3086         state->mixchmask &= ~(1 << nr);
3087         return c;
3088 }
3089
3090 static unsigned int getvolchannel(struct consmixstate *state)
3091 {
3092         unsigned int u;
3093
3094         if ((state->termtype & 0xff00) == 0x0000 && (state->mixchmask & SOUND_MASK_VOLUME))
3095                 return SOUND_MIXER_VOLUME;
3096         if ((state->termtype & 0xff00) == 0x0100) {
3097                 if (state->mixchmask & SOUND_MASK_PCM)
3098                         return SOUND_MIXER_PCM;
3099                 if (state->mixchmask & SOUND_MASK_ALTPCM)
3100                         return SOUND_MIXER_ALTPCM;
3101         }
3102         if ((state->termtype & 0xff00) == 0x0200 && (state->mixchmask & SOUND_MASK_MIC))
3103                 return SOUND_MIXER_MIC;
3104         if ((state->termtype & 0xff00) == 0x0300 && (state->mixchmask & SOUND_MASK_SPEAKER))
3105                 return SOUND_MIXER_SPEAKER;
3106         if ((state->termtype & 0xff00) == 0x0500) {
3107                 if (state->mixchmask & SOUND_MASK_PHONEIN)
3108                         return SOUND_MIXER_PHONEIN;
3109                 if (state->mixchmask & SOUND_MASK_PHONEOUT)
3110                         return SOUND_MIXER_PHONEOUT;
3111         }
3112         if (state->termtype >= 0x710 && state->termtype <= 0x711 && (state->mixchmask & SOUND_MASK_RADIO))
3113                 return SOUND_MIXER_RADIO;
3114         if (state->termtype >= 0x709 && state->termtype <= 0x70f && (state->mixchmask & SOUND_MASK_VIDEO))
3115                 return SOUND_MIXER_VIDEO;
3116         u = ffs(state->mixchmask & (SOUND_MASK_LINE | SOUND_MASK_CD | SOUND_MASK_LINE1 | SOUND_MASK_LINE2 | SOUND_MASK_LINE3 |
3117                                     SOUND_MASK_DIGITAL1 | SOUND_MASK_DIGITAL2 | SOUND_MASK_DIGITAL3));
3118         return u-1;
3119 }
3120
3121 static void prepmixch(struct consmixstate *state)
3122 {
3123         struct usb_device *dev = state->s->usbdev;
3124         struct mixerchannel *ch;
3125         unsigned char buf[2];
3126         __s16 v1;
3127         unsigned int v2, v3;
3128
3129         if (!state->nrmixch || state->nrmixch > SOUND_MIXER_NRDEVICES)
3130                 return;
3131         ch = &state->mixch[state->nrmixch-1];
3132         switch (ch->selector) {
3133         case 0:  /* mixer unit request */
3134                 if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_MIN, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
3135                                     (ch->chnum << 8) | 1, state->ctrlif | (ch->unitid << 8), buf, 2, HZ) < 0)
3136                         goto err;
3137                 ch->minval = buf[0] | (buf[1] << 8);
3138                 if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_MAX, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
3139                                     (ch->chnum << 8) | 1, state->ctrlif | (ch->unitid << 8), buf, 2, HZ) < 0)
3140                         goto err;
3141                 ch->maxval = buf[0] | (buf[1] << 8);
3142                 v2 = ch->maxval - ch->minval;
3143                 if (!v2)
3144                         v2 = 1;
3145                 if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
3146                                     (ch->chnum << 8) | 1, state->ctrlif | (ch->unitid << 8), buf, 2, HZ) < 0)
3147                         goto err;
3148                 v1 = buf[0] | (buf[1] << 8);
3149                 v3 = v1 - ch->minval;
3150                 v3 = 100 * v3 / v2;
3151                 if (v3 > 100)
3152                         v3 = 100;
3153                 ch->value = v3;
3154                 if (ch->flags & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT)) {
3155                         if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
3156                                             ((ch->chnum + !!(ch->flags & MIXFLG_STEREOIN)) << 8) | (1 + !!(ch->flags & MIXFLG_STEREOOUT)),
3157                                             state->ctrlif | (ch->unitid << 8), buf, 2, HZ) < 0)
3158                         goto err;
3159                         v1 = buf[0] | (buf[1] << 8);
3160                         v3 = v1 - ch->minval;
3161                         v3 = 100 * v3 / v2;
3162                         if (v3 > 100)
3163                                 v3 = 100;
3164                 }
3165                 ch->value |= v3 << 8;
3166                 break;
3167
3168                 /* various feature unit controls */
3169         case VOLUME_CONTROL:
3170                 if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_MIN, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
3171                                     (ch->selector << 8) | ch->chnum, state->ctrlif | (ch->unitid << 8), buf, 2, HZ) < 0)
3172                         goto err;
3173                 ch->minval = buf[0] | (buf[1] << 8);
3174                 if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_MAX, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
3175                                     (ch->selector << 8) | ch->chnum, state->ctrlif | (ch->unitid << 8), buf, 2, HZ) < 0)
3176                         goto err;
3177                 ch->maxval = buf[0] | (buf[1] << 8);
3178                 if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
3179                                     (ch->selector << 8) | ch->chnum, state->ctrlif | (ch->unitid << 8), buf, 2, HZ) < 0)
3180                         goto err;
3181                 v1 = buf[0] | (buf[1] << 8);
3182                 v2 = ch->maxval - ch->minval;
3183                 v3 = v1 - ch->minval;
3184                 if (!v2)
3185                         v2 = 1;
3186                 v3 = 100 * v3 / v2;
3187                 if (v3 > 100)
3188                         v3 = 100;
3189                 ch->value = v3;
3190                 if (ch->flags & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT)) {
3191                         if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
3192                                             (ch->selector << 8) | (ch->chnum + 1), state->ctrlif | (ch->unitid << 8), buf, 2, HZ) < 0)
3193                                 goto err;
3194                         v1 = buf[0] | (buf[1] << 8);
3195                         v3 = v1 - ch->minval;
3196                         v3 = 100 * v3 / v2;
3197                         if (v3 > 100)
3198                                 v3 = 100;
3199                 }
3200                 ch->value |= v3 << 8;
3201                 break;
3202
3203         case BASS_CONTROL:
3204         case MID_CONTROL:
3205         case TREBLE_CONTROL:
3206                 if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_MIN, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
3207                                     (ch->selector << 8) | ch->chnum, state->ctrlif | (ch->unitid << 8), buf, 1, HZ) < 0)
3208                         goto err;
3209                 ch->minval = buf[0] << 8;
3210                 if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_MAX, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
3211                                     (ch->selector << 8) | ch->chnum, state->ctrlif | (ch->unitid << 8), buf, 1, HZ) < 0)
3212                         goto err;
3213                 ch->maxval = buf[0] << 8;
3214                 if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
3215                                     (ch->selector << 8) | ch->chnum, state->ctrlif | (ch->unitid << 8), buf, 1, HZ) < 0)
3216                         goto err;
3217                 v1 = buf[0] << 8;
3218                 v2 = ch->maxval - ch->minval;
3219                 v3 = v1 - ch->minval;
3220                 if (!v2)
3221                         v2 = 1;
3222                 v3 = 100 * v3 / v2;
3223                 if (v3 > 100)
3224                         v3 = 100;
3225                 ch->value = v3;
3226                 if (ch->flags & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT)) {
3227                         if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
3228                                             (ch->selector << 8) | (ch->chnum + 1), state->ctrlif | (ch->unitid << 8), buf, 1, HZ) < 0)
3229                                 goto err;
3230                         v1 = buf[0] << 8;
3231                         v3 = v1 - ch->minval;
3232                         v3 = 100 * v3 / v2;
3233                         if (v3 > 100)
3234                                 v3 = 100;
3235                 }
3236                 ch->value |= v3 << 8;
3237                 break;
3238
3239         default:
3240                 goto err;
3241         }
3242         return;
3243
3244  err:
3245         printk(KERN_ERR "usbaudio: mixer request device %u if %u unit %u ch %u selector %u failed\n",
3246                dev->devnum, state->ctrlif, ch->unitid, ch->chnum, ch->selector);
3247         if (state->nrmixch)
3248                 state->nrmixch--;
3249 }
3250
3251
3252 static void usb_audio_recurseunit(struct consmixstate *state, unsigned char unitid);
3253
3254 static inline int checkmixbmap(unsigned char *bmap, unsigned char flg, unsigned int inidx, unsigned int numoch)
3255 {
3256         unsigned int idx;
3257
3258         idx = inidx*numoch;
3259         if (!(bmap[-(idx >> 3)] & (0x80 >> (idx & 7))))
3260                 return 0;
3261         if (!(flg & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT)))
3262                 return 1;
3263         idx = (inidx+!!(flg & MIXFLG_STEREOIN))*numoch+!!(flg & MIXFLG_STEREOOUT);
3264         if (!(bmap[-(idx >> 3)] & (0x80 >> (idx & 7))))
3265                 return 0;
3266         return 1;
3267 }
3268
3269 static void usb_audio_mixerunit(struct consmixstate *state, unsigned char *mixer)
3270 {
3271         unsigned int nroutch = mixer[5+mixer[4]];
3272         unsigned int chidx[SOUND_MIXER_NRDEVICES+1];
3273         unsigned int termt[SOUND_MIXER_NRDEVICES];
3274         unsigned char flg = (nroutch >= 2) ? MIXFLG_STEREOOUT : 0;
3275         unsigned char *bmap = &mixer[9+mixer[4]];
3276         unsigned int bmapsize;
3277         struct mixerchannel *ch;
3278         unsigned int i;
3279
3280         if (!mixer[4]) {
3281                 printk(KERN_ERR "usbaudio: unit %u invalid MIXER_UNIT descriptor\n", mixer[3]);
3282                 return;
3283         }
3284         if (mixer[4] > SOUND_MIXER_NRDEVICES) {
3285                 printk(KERN_ERR "usbaudio: mixer unit %u: too many input pins\n", mixer[3]);
3286                 return;
3287         }
3288         chidx[0] = 0;
3289         for (i = 0; i < mixer[4]; i++) {
3290                 usb_audio_recurseunit(state, mixer[5+i]);
3291                 chidx[i+1] = chidx[i] + state->nrchannels;
3292                 termt[i] = state->termtype;
3293         }
3294         state->termtype = 0;
3295         state->chconfig = mixer[6+mixer[4]] | (mixer[7+mixer[4]] << 8);
3296         bmapsize = (nroutch * chidx[mixer[4]] + 7) >> 3;
3297         bmap += bmapsize - 1;
3298         if (mixer[0] < 10+mixer[4]+bmapsize) {
3299                 printk(KERN_ERR "usbaudio: unit %u invalid MIXER_UNIT descriptor (bitmap too small)\n", mixer[3]);
3300                 return;
3301         }
3302         for (i = 0; i < mixer[4]; i++) {
3303                 state->termtype = termt[i];
3304                 if (chidx[i+1]-chidx[i] >= 2) {
3305                         flg |= MIXFLG_STEREOIN;
3306                         if (checkmixbmap(bmap, flg, chidx[i], nroutch)) {
3307                                 ch = getmixchannel(state, getvolchannel(state));
3308                                 if (ch) {
3309                                         ch->unitid = mixer[3];
3310                                         ch->selector = 0;
3311                                         ch->chnum = chidx[i]+1;
3312                                         ch->flags = flg;
3313                                         prepmixch(state);
3314                                 }
3315                                 continue;
3316                         }
3317                 }
3318                 flg &= ~MIXFLG_STEREOIN;
3319                 if (checkmixbmap(bmap, flg, chidx[i], nroutch)) {
3320                         ch = getmixchannel(state, getvolchannel(state));
3321                         if (ch) {
3322                                 ch->unitid = mixer[3];
3323                                 ch->selector = 0;
3324                                 ch->chnum = chidx[i]+1;
3325                                 ch->flags = flg;
3326                                 prepmixch(state);
3327                         }
3328                 }
3329         }
3330         state->termtype = 0;
3331 }
3332
3333 static struct mixerchannel *slctsrc_findunit(struct consmixstate *state, __u8 unitid)
3334 {
3335         unsigned int i;
3336
3337         for (i = 0; i < state->nrmixch; i++)
3338                 if (state->mixch[i].unitid == unitid)
3339                         return &state->mixch[i];
3340         return NULL;
3341 }
3342
3343 static void usb_audio_selectorunit(struct consmixstate *state, unsigned char *selector)
3344 {
3345         unsigned int chnum, i, mixch;
3346         struct mixerchannel *mch;
3347
3348         if (!selector[4]) {
3349                 printk(KERN_ERR "usbaudio: unit %u invalid SELECTOR_UNIT descriptor\n", selector[3]);
3350                 return;
3351         }
3352         mixch = state->nrmixch;
3353         usb_audio_recurseunit(state, selector[5]);
3354         if (state->nrmixch != mixch) {
3355                 mch = &state->mixch[state->nrmixch-1];
3356                 mch->slctunitid = selector[3] | (1 << 8);
3357         } else if ((mch = slctsrc_findunit(state, selector[5]))) {
3358                 mch->slctunitid = selector[3] | (1 << 8);
3359         } else {
3360                 printk(KERN_INFO "usbaudio: selector unit %u: ignoring channel 1\n", selector[3]);
3361         }
3362         chnum = state->nrchannels;
3363         for (i = 1; i < selector[4]; i++) {
3364                 mixch = state->nrmixch;
3365                 usb_audio_recurseunit(state, selector[5+i]);
3366                 if (chnum != state->nrchannels) {
3367                         printk(KERN_ERR "usbaudio: selector unit %u: input pins with varying channel numbers\n", selector[3]);
3368                         state->termtype = 0;
3369                         state->chconfig = 0;
3370                         state->nrchannels = 0;
3371                         return;
3372                 }
3373                 if (state->nrmixch != mixch) {
3374                         mch = &state->mixch[state->nrmixch-1];
3375                         mch->slctunitid = selector[3] | ((i + 1) << 8);
3376                 } else if ((mch = slctsrc_findunit(state, selector[5+i]))) {
3377                         mch->slctunitid = selector[3] | ((i + 1) << 8);
3378                 } else {
3379                         printk(KERN_INFO "usbaudio: selector unit %u: ignoring channel %u\n", selector[3], i+1);
3380                 }
3381         }
3382         state->termtype = 0;
3383         state->chconfig = 0;
3384 }
3385
3386 /* in the future we might try to handle 3D etc. effect units */
3387
3388 static void usb_audio_processingunit(struct consmixstate *state, unsigned char *proc)
3389 {
3390         unsigned int i;
3391
3392         for (i = 0; i < proc[6]; i++)
3393                 usb_audio_recurseunit(state, proc[7+i]);
3394         state->nrchannels = proc[7+proc[6]];
3395         state->termtype = 0;
3396         state->chconfig = proc[8+proc[6]] | (proc[9+proc[6]] << 8);
3397 }
3398
3399
3400 /* See Audio Class Spec, section 4.3.2.5 */
3401 static void usb_audio_featureunit(struct consmixstate *state, unsigned char *ftr)
3402 {
3403         struct mixerchannel *ch;
3404         unsigned short chftr, mchftr;
3405 #if 0
3406         struct usb_device *dev = state->s->usbdev;
3407         unsigned char data[1];
3408 #endif
3409         unsigned char nr_logical_channels, i;
3410
3411         usb_audio_recurseunit(state, ftr[4]);
3412
3413         if (ftr[5] == 0 ) {
3414                 printk(KERN_ERR "usbaudio: wrong controls size in feature unit %u\n",ftr[3]);
3415                 return;
3416         }
3417
3418         if (state->nrchannels == 0) {
3419                 printk(KERN_ERR "usbaudio: feature unit %u source has no channels\n", ftr[3]);
3420                 return;
3421         }
3422         if (state->nrchannels > 2)
3423                 printk(KERN_WARNING "usbaudio: feature unit %u: OSS mixer interface does not support more than 2 channels\n", ftr[3]);
3424
3425         nr_logical_channels=(ftr[0]-7)/ftr[5]-1;
3426
3427         if (nr_logical_channels != state->nrchannels) {
3428                 printk(KERN_WARNING "usbaudio: warning: found %d of %d logical channels.\n", state->nrchannels,nr_logical_channels);
3429
3430                 if (state->nrchannels == 1 && nr_logical_channels==0) {
3431                         printk(KERN_INFO "usbaudio: assuming the channel found is the master channel (got a Philips camera?). Should be fine.\n");
3432                 } else if (state->nrchannels == 1 && nr_logical_channels==2) {
3433                         printk(KERN_INFO "usbaudio: assuming that a stereo channel connected directly to a mixer is missing in search (got Labtec headset?). Should be fine.\n");
3434                         state->nrchannels=nr_logical_channels;
3435                 } else {
3436                         printk(KERN_WARNING "usbaudio: no idea what's going on..., contact linux-usb-devel@lists.sourceforge.net\n");
3437                 }
3438         }
3439
3440         /* There is always a master channel */
3441         mchftr = ftr[6];
3442         /* Binary AND over logical channels if they exist */
3443         if (nr_logical_channels) {
3444                 chftr = ftr[6+ftr[5]];
3445                 for (i = 2; i <= nr_logical_channels; i++)
3446                         chftr &= ftr[6+i*ftr[5]];
3447         } else {
3448                 chftr = 0;
3449         }
3450
3451         /* volume control */
3452         if (chftr & 2) {
3453                 ch = getmixchannel(state, getvolchannel(state));
3454                 if (ch) {
3455                         ch->unitid = ftr[3];
3456                         ch->selector = VOLUME_CONTROL;
3457                         ch->chnum = 1;
3458                         ch->flags = (state->nrchannels > 1) ? (MIXFLG_STEREOIN | MIXFLG_STEREOOUT) : 0;
3459                         prepmixch(state);
3460                 }
3461         } else if (mchftr & 2) {
3462                 ch = getmixchannel(state, getvolchannel(state));
3463                 if (ch) {
3464                         ch->unitid = ftr[3];
3465                         ch->selector = VOLUME_CONTROL;
3466                         ch->chnum = 0;
3467                         ch->flags = 0;
3468                         prepmixch(state);
3469                 }
3470         }
3471         /* bass control */
3472         if (chftr & 4) {
3473                 ch = getmixchannel(state, SOUND_MIXER_BASS);
3474                 if (ch) {
3475                         ch->unitid = ftr[3];
3476                         ch->selector = BASS_CONTROL;
3477                         ch->chnum = 1;
3478                         ch->flags = (state->nrchannels > 1) ? (MIXFLG_STEREOIN | MIXFLG_STEREOOUT) : 0;
3479                         prepmixch(state);
3480                 }
3481         } else if (mchftr & 4) {
3482                 ch = getmixchannel(state, SOUND_MIXER_BASS);
3483                 if (ch) {
3484                         ch->unitid = ftr[3];
3485                         ch->selector = BASS_CONTROL;
3486                         ch->chnum = 0;
3487                         ch->flags = 0;
3488                         prepmixch(state);
3489                 }
3490         }
3491         /* treble control */
3492         if (chftr & 16) {
3493                 ch = getmixchannel(state, SOUND_MIXER_TREBLE);
3494                 if (ch) {
3495                         ch->unitid = ftr[3];
3496                         ch->selector = TREBLE_CONTROL;
3497                         ch->chnum = 1;
3498                         ch->flags = (state->nrchannels > 1) ? (MIXFLG_STEREOIN | MIXFLG_STEREOOUT) : 0;
3499                         prepmixch(state);
3500                 }
3501         } else if (mchftr & 16) {
3502                 ch = getmixchannel(state, SOUND_MIXER_TREBLE);
3503                 if (ch) {
3504                         ch->unitid = ftr[3];
3505                         ch->selector = TREBLE_CONTROL;
3506                         ch->chnum = 0;
3507                         ch->flags = 0;
3508                         prepmixch(state);
3509                 }
3510         }
3511 #if 0
3512         /* if there are mute controls, unmute them */
3513         /* does not seem to be necessary, and the Dallas chip does not seem to support the "all" channel (255) */
3514         if ((chftr & 1) || (mchftr & 1)) {
3515                 printk(KERN_DEBUG "usbaudio: unmuting feature unit %u interface %u\n", ftr[3], state->ctrlif);
3516                 data[0] = 0;
3517                 if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
3518                                     (MUTE_CONTROL << 8) | 0xff, state->ctrlif | (ftr[3] << 8), data, 1, HZ) < 0)
3519                         printk(KERN_WARNING "usbaudio: failure to unmute feature unit %u interface %u\n", ftr[3], state->ctrlif);
3520         }
3521 #endif
3522 }
3523
3524 static void usb_audio_recurseunit(struct consmixstate *state, unsigned char unitid)
3525 {
3526         unsigned char *p1;
3527         unsigned int i, j;
3528
3529         if (test_and_set_bit(unitid, state->unitbitmap)) {
3530                 printk(KERN_INFO "usbaudio: mixer path revisits unit %d\n", unitid);
3531                 return;
3532         }
3533         p1 = find_audiocontrol_unit(state->buffer, state->buflen, NULL, unitid, state->ctrlif);
3534         if (!p1) {
3535                 printk(KERN_ERR "usbaudio: unit %d not found!\n", unitid);
3536                 return;
3537         }
3538         state->nrchannels = 0;
3539         state->termtype = 0;
3540         state->chconfig = 0;
3541         switch (p1[2]) {
3542         case INPUT_TERMINAL:
3543                 if (p1[0] < 12) {
3544                         printk(KERN_ERR "usbaudio: unit %u: invalid INPUT_TERMINAL descriptor\n", unitid);
3545                         return;
3546                 }
3547                 state->nrchannels = p1[7];
3548                 state->termtype = p1[4] | (p1[5] << 8);
3549                 state->chconfig = p1[8] | (p1[9] << 8);
3550                 return;
3551
3552         case MIXER_UNIT:
3553                 if (p1[0] < 10 || p1[0] < 10+p1[4]) {
3554                         printk(KERN_ERR "usbaudio: unit %u: invalid MIXER_UNIT descriptor\n", unitid);
3555                         return;
3556                 }
3557                 usb_audio_mixerunit(state, p1);
3558                 return;
3559
3560         case SELECTOR_UNIT:
3561                 if (p1[0] < 6 || p1[0] < 6+p1[4]) {
3562                         printk(KERN_ERR "usbaudio: unit %u: invalid SELECTOR_UNIT descriptor\n", unitid);
3563                         return;
3564                 }
3565                 usb_audio_selectorunit(state, p1);
3566                 return;
3567
3568         case FEATURE_UNIT: /* See USB Audio Class Spec 4.3.2.5 */
3569                 if (p1[0] < 7 || p1[0] < 7+p1[5]) {
3570                         printk(KERN_ERR "usbaudio: unit %u: invalid FEATURE_UNIT descriptor\n", unitid);
3571                         return;
3572                 }
3573                 usb_audio_featureunit(state, p1);
3574                 return;
3575
3576         case PROCESSING_UNIT:
3577                 if (p1[0] < 13 || p1[0] < 13+p1[6] || p1[0] < 13+p1[6]+p1[11+p1[6]]) {
3578                         printk(KERN_ERR "usbaudio: unit %u: invalid PROCESSING_UNIT descriptor\n", unitid);
3579                         return;
3580                 }
3581                 usb_audio_processingunit(state, p1);
3582                 return;
3583
3584         case EXTENSION_UNIT:
3585                 if (p1[0] < 13 || p1[0] < 13+p1[6] || p1[0] < 13+p1[6]+p1[11+p1[6]]) {
3586                         printk(KERN_ERR "usbaudio: unit %u: invalid EXTENSION_UNIT descriptor\n", unitid);
3587                         return;
3588                 }
3589                 for (j = i = 0; i < p1[6]; i++) {
3590                         usb_audio_recurseunit(state, p1[7+i]);
3591                         if (!i)
3592                                 j = state->termtype;
3593                         else if (j != state->termtype)
3594                                 j = 0;
3595                 }
3596                 state->nrchannels = p1[7+p1[6]];
3597                 state->chconfig = p1[8+p1[6]] | (p1[9+p1[6]] << 8);
3598                 state->termtype = j;
3599                 return;
3600
3601         default:
3602                 printk(KERN_ERR "usbaudio: unit %u: unexpected type 0x%02x\n", unitid, p1[2]);
3603                 return;
3604         }
3605 }
3606
3607 static void usb_audio_constructmixer(struct usb_audio_state *s, unsigned char *buffer, unsigned int buflen, unsigned int ctrlif, unsigned char *oterm)
3608 {
3609         struct usb_mixerdev *ms;
3610         struct consmixstate state;
3611
3612         memset(&state, 0, sizeof(state));
3613         state.s = s;
3614         state.nrmixch = 0;
3615         state.mixchmask = ~0;
3616         state.buffer = buffer;
3617         state.buflen = buflen;
3618         state.ctrlif = ctrlif;
3619         set_bit(oterm[3], state.unitbitmap);  /* mark terminal ID as visited */
3620         printk(KERN_DEBUG "usbaudio: constructing mixer for Terminal %u type 0x%04x\n",
3621                oterm[3], oterm[4] | (oterm[5] << 8));
3622         usb_audio_recurseunit(&state, oterm[7]);
3623         if (!state.nrmixch) {
3624                 printk(KERN_INFO "usbaudio: no mixer controls found for Terminal %u\n", oterm[3]);
3625                 return;
3626         }
3627         if (!(ms = kmalloc(sizeof(struct usb_mixerdev)+state.nrmixch*sizeof(struct mixerchannel), GFP_KERNEL)))
3628                 return;
3629         memset(ms, 0, sizeof(struct usb_mixerdev));
3630         memcpy(&ms->ch, &state.mixch, state.nrmixch*sizeof(struct mixerchannel));
3631         ms->state = s;
3632         ms->iface = ctrlif;
3633         ms->numch = state.nrmixch;
3634         if ((ms->dev_mixer = register_sound_mixer(&usb_mixer_fops, -1)) < 0) {
3635                 printk(KERN_ERR "usbaudio: cannot register mixer\n");
3636                 kfree(ms);
3637                 return;
3638         }
3639         printk(KERN_INFO "usbaudio: registered mixer 14,%d\n", ms->dev_mixer);
3640         list_add_tail(&ms->list, &s->mixerlist);
3641 }
3642
3643 /* arbitrary limit, we won't check more interfaces than this */
3644 #define USB_MAXINTERFACES       32
3645
3646 static struct usb_audio_state *usb_audio_parsecontrol(struct usb_device *dev, unsigned char *buffer, unsigned int buflen, unsigned int ctrlif)
3647 {
3648         struct usb_audio_state *s;
3649         struct usb_interface *iface;
3650         struct usb_host_interface *alt;
3651         unsigned char ifin[USB_MAXINTERFACES], ifout[USB_MAXINTERFACES];
3652         unsigned char *p1;
3653         unsigned int i, j, k, numifin = 0, numifout = 0;
3654
3655         if (!(s = kmalloc(sizeof(struct usb_audio_state), GFP_KERNEL)))
3656                 return NULL;
3657         memset(s, 0, sizeof(struct usb_audio_state));
3658         INIT_LIST_HEAD(&s->audiolist);
3659         INIT_LIST_HEAD(&s->mixerlist);
3660         s->usbdev = dev;
3661         s->count = 1;
3662
3663         /* find audiocontrol interface */
3664         if (!(p1 = find_csinterface_descriptor(buffer, buflen, NULL, HEADER, ctrlif, -1))) {
3665                 printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u no HEADER found\n",
3666                        dev->devnum, ctrlif);
3667                 goto ret;
3668         }
3669         if (p1[0] < 8 + p1[7]) {
3670                 printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u HEADER error\n",
3671                        dev->devnum, ctrlif);
3672                 goto ret;
3673         }
3674         if (!p1[7])
3675                 printk(KERN_INFO "usbaudio: device %d audiocontrol interface %u has no AudioStreaming and MidiStreaming interfaces\n",
3676                        dev->devnum, ctrlif);
3677         for (i = 0; i < p1[7]; i++) {
3678                 j = p1[8+i];
3679                 iface = usb_ifnum_to_if(dev, j);
3680                 if (!iface) {
3681                         printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u interface %u does not exist\n",
3682                                dev->devnum, ctrlif, j);
3683                         continue;
3684                 }
3685                 if (iface->num_altsetting == 1) {
3686                         printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u has only 1 altsetting.\n", dev->devnum, ctrlif);
3687                         continue;
3688                 }
3689                 alt = usb_altnum_to_altsetting(iface, 0);
3690                 if (!alt) {
3691                         printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u interface %u has no altsetting 0\n",
3692                                dev->devnum, ctrlif, j);
3693                         continue;
3694                 }
3695                 if (alt->desc.bInterfaceClass != USB_CLASS_AUDIO) {
3696                         printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u interface %u is not an AudioClass interface\n",
3697                                dev->devnum, ctrlif, j);
3698                         continue;
3699                 }
3700                 if (alt->desc.bInterfaceSubClass == 3) {
3701                         printk(KERN_INFO "usbaudio: device %d audiocontrol interface %u interface %u MIDIStreaming not supported\n",
3702                                dev->devnum, ctrlif, j);
3703                         continue;
3704                 }
3705                 if (alt->desc.bInterfaceSubClass != 2) {
3706                         printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u interface %u invalid AudioClass subtype\n",
3707                                dev->devnum, ctrlif, j);
3708                         continue;
3709                 }
3710                 if (alt->desc.bNumEndpoints > 0) {
3711                         /* Check all endpoints; should they all have a bandwidth of 0 ? */
3712                         for (k = 0; k < alt->desc.bNumEndpoints; k++) {
3713                                 if (alt->endpoint[k].desc.wMaxPacketSize > 0) {
3714                                         printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u endpoint %d does not have 0 bandwidth at alt[0]\n", dev->devnum, ctrlif, k);
3715                                         break;
3716                                 }
3717                         }
3718                         if (k < alt->desc.bNumEndpoints)
3719                                 continue;
3720                 }
3721
3722                 alt = usb_altnum_to_altsetting(iface, 1);
3723                 if (!alt) {
3724                         printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u interface %u has no altsetting 1\n",
3725                                dev->devnum, ctrlif, j);
3726                         continue;
3727                 }
3728                 if (alt->desc.bNumEndpoints < 1) {
3729                         printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u interface %u has no endpoint\n",
3730                                dev->devnum, ctrlif, j);
3731                         continue;
3732                 }
3733                 /* note: this requires the data endpoint to be ep0 and the optional sync
3734                    ep to be ep1, which seems to be the case */
3735                 if (alt->endpoint[0].desc.bEndpointAddress & USB_DIR_IN) {
3736                         if (numifin < USB_MAXINTERFACES) {
3737                                 ifin[numifin++] = j;
3738                                 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1);
3739                         }
3740                 } else {
3741                         if (numifout < USB_MAXINTERFACES) {
3742                                 ifout[numifout++] = j;
3743                                 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1);
3744                         }
3745                 }
3746         }
3747         printk(KERN_INFO "usbaudio: device %d audiocontrol interface %u has %u input and %u output AudioStreaming interfaces\n",
3748                dev->devnum, ctrlif, numifin, numifout);
3749         for (i = 0; i < numifin && i < numifout; i++)
3750                 usb_audio_parsestreaming(s, buffer, buflen, ifin[i], ifout[i]);
3751         for (j = i; j < numifin; j++)
3752                 usb_audio_parsestreaming(s, buffer, buflen, ifin[i], -1);
3753         for (j = i; j < numifout; j++)
3754                 usb_audio_parsestreaming(s, buffer, buflen, -1, ifout[i]);
3755         /* now walk through all OUTPUT_TERMINAL descriptors to search for mixers */
3756         p1 = find_csinterface_descriptor(buffer, buflen, NULL, OUTPUT_TERMINAL, ctrlif, -1);
3757         while (p1) {
3758                 if (p1[0] >= 9)
3759                         usb_audio_constructmixer(s, buffer, buflen, ctrlif, p1);
3760                 p1 = find_csinterface_descriptor(buffer, buflen, p1, OUTPUT_TERMINAL, ctrlif, -1);
3761         }
3762
3763 ret:
3764         if (list_empty(&s->audiolist) && list_empty(&s->mixerlist)) {
3765                 kfree(s);
3766                 return NULL;
3767         }
3768         /* everything successful */
3769         down(&open_sem);
3770         list_add_tail(&s->audiodev, &audiodevs);
3771         up(&open_sem);
3772         printk(KERN_DEBUG "usb_audio_parsecontrol: usb_audio_state at %p\n", s);
3773         return s;
3774 }
3775
3776 /* we only care for the currently active configuration */
3777
3778 static int usb_audio_probe(struct usb_interface *intf,
3779                            const struct usb_device_id *id)
3780 {
3781         struct usb_device *dev = interface_to_usbdev (intf);
3782         struct usb_audio_state *s;
3783         unsigned char *buffer;
3784         unsigned int buflen;
3785
3786 #if 0
3787         printk(KERN_DEBUG "usbaudio: Probing if %i: IC %x, ISC %x\n", ifnum,
3788                config->interface[ifnum].altsetting[0].desc.bInterfaceClass,
3789                config->interface[ifnum].altsetting[0].desc.bInterfaceSubClass);
3790 #endif
3791
3792         /*
3793          * audiocontrol interface found
3794          * find which configuration number is active
3795          */
3796         buffer = dev->rawdescriptors[dev->actconfig - dev->config];
3797         buflen = dev->actconfig->desc.wTotalLength;
3798         s = usb_audio_parsecontrol(dev, buffer, buflen, intf->altsetting->desc.bInterfaceNumber);
3799         if (s) {
3800                 usb_set_intfdata (intf, s);
3801                 return 0;
3802         }
3803         return -ENODEV;
3804 }
3805
3806
3807 /* a revoke facility would make things simpler */
3808
3809 static void usb_audio_disconnect(struct usb_interface *intf)
3810 {
3811         struct usb_audio_state *s = usb_get_intfdata (intf);
3812         struct list_head *list;
3813         struct usb_audiodev *as;
3814         struct usb_mixerdev *ms;
3815
3816         if (!s)
3817                 return;
3818
3819         /* we get called with -1 for every audiostreaming interface registered */
3820         if (s == (struct usb_audio_state *)-1) {
3821                 dprintk((KERN_DEBUG "usbaudio: note, usb_audio_disconnect called with -1\n"));
3822                 return;
3823         }
3824         if (!s->usbdev) {
3825                 dprintk((KERN_DEBUG "usbaudio: error,  usb_audio_disconnect already called for %p!\n", s));
3826                 return;
3827         }
3828         down(&open_sem);
3829         list_del_init(&s->audiodev);
3830         s->usbdev = NULL;
3831         usb_set_intfdata (intf, NULL);
3832
3833         /* deregister all audio and mixer devices, so no new processes can open this device */
3834         for(list = s->audiolist.next; list != &s->audiolist; list = list->next) {
3835                 as = list_entry(list, struct usb_audiodev, list);
3836                 usbin_disc(as);
3837                 usbout_disc(as);
3838                 wake_up(&as->usbin.dma.wait);
3839                 wake_up(&as->usbout.dma.wait);
3840                 if (as->dev_audio >= 0) {
3841                         unregister_sound_dsp(as->dev_audio);
3842                         printk(KERN_INFO "usbaudio: unregister dsp 14,%d\n", as->dev_audio);
3843                 }
3844                 as->dev_audio = -1;
3845         }
3846         for(list = s->mixerlist.next; list != &s->mixerlist; list = list->next) {
3847                 ms = list_entry(list, struct usb_mixerdev, list);
3848                 if (ms->dev_mixer >= 0) {
3849                         unregister_sound_mixer(ms->dev_mixer);
3850                         printk(KERN_INFO "usbaudio: unregister mixer 14,%d\n", ms->dev_mixer);
3851                 }
3852                 ms->dev_mixer = -1;
3853         }
3854         release(s);
3855         wake_up(&open_wait);
3856 }
3857
3858 static int __init usb_audio_init(void)
3859 {
3860         int result = usb_register(&usb_audio_driver);
3861         if (result == 0)
3862                 info(DRIVER_VERSION ":" DRIVER_DESC);
3863         return result;
3864 }
3865
3866
3867 static void __exit usb_audio_cleanup(void)
3868 {
3869         usb_deregister(&usb_audio_driver);
3870 }
3871
3872 module_init(usb_audio_init);
3873 module_exit(usb_audio_cleanup);
3874
3875 MODULE_AUTHOR( DRIVER_AUTHOR );
3876 MODULE_DESCRIPTION( DRIVER_DESC );
3877 MODULE_LICENSE("GPL");
3878