sound/usb/usbaudio.c

   1 /*
   2  *   (Tentative) USB Audio Driver for ALSA
   3  *
   4  *   Main and PCM part
   5  *
   6  *   Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
   7  *
   8  *   Many codes borrowed from audio.c by
   9  *          Alan Cox (alan@lxorguk.ukuu.org.uk)
  10  *          Thomas Sailer (sailer@ife.ee.ethz.ch)
  11  *
  12  *
  13  *   This program is free software; you can redistribute it and/or modify
  14  *   it under the terms of the GNU General Public License as published by
  15  *   the Free Software Foundation; either version 2 of the License, or
  16  *   (at your option) any later version.
  17  *
  18  *   This program is distributed in the hope that it will be useful,
  19  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  *   GNU General Public License for more details.
  22  *
  23  *   You should have received a copy of the GNU General Public License
  24  *   along with this program; if not, write to the Free Software
  25  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  26  *
  27  *
  28  *  NOTES:
  29  *
  30  *   - async unlink should be used for avoiding the sleep inside lock.
  31  *     2.4.22 usb-uhci seems buggy for async unlinking and results in
  32  *     oops.  in such a cse, pass async_unlink=0 option.
  33  *   - the linked URBs would be preferred but not used so far because of
  34  *     the instability of unlinking.
  35  *   - type II is not supported properly.  there is no device which supports
  36  *     this type *correctly*.  SB extigy looks as if it supports, but it's
  37  *     indeed an AC3 stream packed in SPDIF frames (i.e. no real AC3 stream).
  38  */
  39
  40
  41 #include <linux/bitops.h>
  42 #include <linux/init.h>
  43 #include <linux/list.h>
  44 #include <linux/slab.h>
  45 #include <linux/string.h>
  46 #include <linux/usb.h>
  47 #include <linux/vmalloc.h>
  48 #include <linux/moduleparam.h>
  49 #include <linux/mutex.h>
  50 #include <sound/core.h>
  51 #include <sound/info.h>
  52 #include <sound/pcm.h>
  53 #include <sound/pcm_params.h>
  54 #include <sound/initval.h>
  55
  56 #include "usbaudio.h"
  57
  58
  59 MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
  60 MODULE_DESCRIPTION("USB Audio");
  61 MODULE_LICENSE("GPL");
  62 MODULE_SUPPORTED_DEVICE("{{Generic,USB Audio}}");
  63
  64
  65 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;      /* Index 0-MAX */
  66 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* ID for this card */
  67 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;/* Enable this card */
  68 /* Vendor/product IDs for this card */
  69 static int vid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 };
  70 static int pid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 };
  71 static int nrpacks = 8;         /* max. number of packets per urb */
  72 static int async_unlink = 1;
  73 static int device_setup[SNDRV_CARDS]; /* device parameter for this card*/
  74 static int ignore_ctl_error;
  75
  76 module_param_array(index, int, NULL, 0444);
  77 MODULE_PARM_DESC(index, "Index value for the USB audio adapter.");
  78 module_param_array(id, charp, NULL, 0444);
  79 MODULE_PARM_DESC(id, "ID string for the USB audio adapter.");
  80 module_param_array(enable, bool, NULL, 0444);
  81 MODULE_PARM_DESC(enable, "Enable USB audio adapter.");
  82 module_param_array(vid, int, NULL, 0444);
  83 MODULE_PARM_DESC(vid, "Vendor ID for the USB audio device.");
  84 module_param_array(pid, int, NULL, 0444);
  85 MODULE_PARM_DESC(pid, "Product ID for the USB audio device.");
  86 module_param(nrpacks, int, 0644);
  87 MODULE_PARM_DESC(nrpacks, "Max. number of packets per URB.");
  88 module_param(async_unlink, bool, 0444);
  89 MODULE_PARM_DESC(async_unlink, "Use async unlink mode.");
  90 module_param_array(device_setup, int, NULL, 0444);
  91 MODULE_PARM_DESC(device_setup, "Specific device setup (if needed).");
  92 module_param(ignore_ctl_error, bool, 0444);
  93 MODULE_PARM_DESC(ignore_ctl_error,
  94                  "Ignore errors from USB controller for mixer interfaces.");
  95
  96 /*
  97  * debug the h/w constraints
  98  */
  99 /* #define HW_CONST_DEBUG */
 100
 101
 102 /*
 103  *
 104  */
 105
 106 #define MAX_PACKS       20
 107 #define MAX_PACKS_HS    (MAX_PACKS * 8) /* in high speed mode */
 108 #define MAX_URBS        8
 109 #define SYNC_URBS       4       /* always four urbs for sync */
 110 #define MIN_PACKS_URB   1       /* minimum 1 packet per urb */
 111
 112 struct audioformat {
 113         struct list_head list;
 114         snd_pcm_format_t format;        /* format type */
 115         unsigned int channels;          /* # channels */
 116         unsigned int fmt_type;          /* USB audio format type (1-3) */
 117         unsigned int frame_size;        /* samples per frame for non-audio */
 118         int iface;                      /* interface number */
 119         unsigned char altsetting;       /* corresponding alternate setting */
 120         unsigned char altset_idx;       /* array index of altenate setting */
 121         unsigned char attributes;       /* corresponding attributes of cs endpoint */
 122         unsigned char endpoint;         /* endpoint */
 123         unsigned char ep_attr;          /* endpoint attributes */
 124         unsigned int maxpacksize;       /* max. packet size */
 125         unsigned int rates;             /* rate bitmasks */
 126         unsigned int rate_min, rate_max;        /* min/max rates */
 127         unsigned int nr_rates;          /* number of rate table entries */
 128         unsigned int *rate_table;       /* rate table */
 129 };
 130
 131 struct snd_usb_substream;
 132
 133 struct snd_urb_ctx {
 134         struct urb *urb;
 135         unsigned int buffer_size;       /* size of data buffer, if data URB */
 136         struct snd_usb_substream *subs;
 137         int index;      /* index for urb array */
 138         int packets;    /* number of packets per urb */
 139 };
 140
 141 struct snd_urb_ops {
 142         int (*prepare)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u);
 143         int (*retire)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u);
 144         int (*prepare_sync)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u);
 145         int (*retire_sync)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u);
 146 };
 147
 148 struct snd_usb_substream {
 149         struct snd_usb_stream *stream;
 150         struct usb_device *dev;
 151         struct snd_pcm_substream *pcm_substream;
 152         int direction;  /* playback or capture */
 153         int interface;  /* current interface */
 154         int endpoint;   /* assigned endpoint */
 155         struct audioformat *cur_audiofmt;       /* current audioformat pointer (for hw_params callback) */
 156         unsigned int cur_rate;          /* current rate (for hw_params callback) */
 157         unsigned int period_bytes;      /* current period bytes (for hw_params callback) */
 158         unsigned int format;     /* USB data format */
 159         unsigned int datapipe;   /* the data i/o pipe */
 160         unsigned int syncpipe;   /* 1 - async out or adaptive in */
 161         unsigned int datainterval;      /* log_2 of data packet interval */
 162         unsigned int syncinterval;  /* P for adaptive mode, 0 otherwise */
 163         unsigned int freqn;      /* nominal sampling rate in fs/fps in Q16.16 format */
 164         unsigned int freqm;      /* momentary sampling rate in fs/fps in Q16.16 format */
 165         unsigned int freqmax;    /* maximum sampling rate, used for buffer management */
 166         unsigned int phase;      /* phase accumulator */
 167         unsigned int maxpacksize;       /* max packet size in bytes */
 168         unsigned int maxframesize;      /* max packet size in frames */
 169         unsigned int curpacksize;       /* current packet size in bytes (for capture) */
 170         unsigned int curframesize;      /* current packet size in frames (for capture) */
 171         unsigned int fill_max: 1;       /* fill max packet size always */
 172         unsigned int fmt_type;          /* USB audio format type (1-3) */
 173         unsigned int packs_per_ms;      /* packets per millisecond (for playback) */
 174
 175         unsigned int running: 1;        /* running status */
 176
 177         unsigned int hwptr_done;                        /* processed frame position in the buffer */
 178         unsigned int transfer_done;             /* processed frames since last period update */
 179         unsigned long active_mask;      /* bitmask of active urbs */
 180         unsigned long unlink_mask;      /* bitmask of unlinked urbs */
 181
 182         unsigned int nurbs;                     /* # urbs */
 183         struct snd_urb_ctx dataurb[MAX_URBS];   /* data urb table */
 184         struct snd_urb_ctx syncurb[SYNC_URBS];  /* sync urb table */
 185         char *syncbuf;                          /* sync buffer for all sync URBs */
 186         dma_addr_t sync_dma;                    /* DMA address of syncbuf */
 187
 188         u64 formats;                    /* format bitmasks (all or'ed) */
 189         unsigned int num_formats;               /* number of supported audio formats (list) */
 190         struct list_head fmt_list;      /* format list */
 191         struct snd_pcm_hw_constraint_list rate_list;    /* limited rates */
 192         spinlock_t lock;
 193
 194         struct snd_urb_ops ops;         /* callbacks (must be filled at init) */
 195 };
 196
 197
 198 struct snd_usb_stream {
 199         struct snd_usb_audio *chip;
 200         struct snd_pcm *pcm;
 201         int pcm_index;
 202         unsigned int fmt_type;          /* USB audio format type (1-3) */
 203         struct snd_usb_substream substream[2];
 204         struct list_head list;
 205 };
 206
 207
 208 /*
 209  * we keep the snd_usb_audio_t instances by ourselves for merging
 210  * the all interfaces on the same card as one sound device.
 211  */
 212
 213 static DEFINE_MUTEX(register_mutex);
 214 static struct snd_usb_audio *usb_chip[SNDRV_CARDS];
 215
 216
 217 /*
 218  * convert a sampling rate into our full speed format (fs/1000 in Q16.16)
 219  * this will overflow at approx 524 kHz
 220  */
 221 static inline unsigned get_usb_full_speed_rate(unsigned int rate)
 222 {
 223         return ((rate << 13) + 62) / 125;
 224 }
 225
 226 /*
 227  * convert a sampling rate into USB high speed format (fs/8000 in Q16.16)
 228  * this will overflow at approx 4 MHz
 229  */
 230 static inline unsigned get_usb_high_speed_rate(unsigned int rate)
 231 {
 232         return ((rate << 10) + 62) / 125;
 233 }
 234
 235 /* convert our full speed USB rate into sampling rate in Hz */
 236 static inline unsigned get_full_speed_hz(unsigned int usb_rate)
 237 {
 238         return (usb_rate * 125 + (1 << 12)) >> 13;
 239 }
 240
 241 /* convert our high speed USB rate into sampling rate in Hz */
 242 static inline unsigned get_high_speed_hz(unsigned int usb_rate)
 243 {
 244         return (usb_rate * 125 + (1 << 9)) >> 10;
 245 }
 246
 247
 248 /*
 249  * prepare urb for full speed capture sync pipe
 250  *
 251  * fill the length and offset of each urb descriptor.
 252  * the fixed 10.14 frequency is passed through the pipe.
 253  */
 254 static int prepare_capture_sync_urb(struct snd_usb_substream *subs,
 255                                     struct snd_pcm_runtime *runtime,
 256                                     struct urb *urb)
 257 {
 258         unsigned char *cp = urb->transfer_buffer;
 259         struct snd_urb_ctx *ctx = urb->context;
 260
 261         urb->dev = ctx->subs->dev; /* we need to set this at each time */
 262         urb->iso_frame_desc[0].length = 3;
 263         urb->iso_frame_desc[0].offset = 0;
 264         cp[0] = subs->freqn >> 2;
 265         cp[1] = subs->freqn >> 10;
 266         cp[2] = subs->freqn >> 18;
 267         return 0;
 268 }
 269
 270 /*
 271  * prepare urb for high speed capture sync pipe
 272  *
 273  * fill the length and offset of each urb descriptor.
 274  * the fixed 12.13 frequency is passed as 16.16 through the pipe.
 275  */
 276 static int prepare_capture_sync_urb_hs(struct snd_usb_substream *subs,
 277                                        struct snd_pcm_runtime *runtime,
 278                                        struct urb *urb)
 279 {
 280         unsigned char *cp = urb->transfer_buffer;
 281         struct snd_urb_ctx *ctx = urb->context;
 282
 283         urb->dev = ctx->subs->dev; /* we need to set this at each time */
 284         urb->iso_frame_desc[0].length = 4;
 285         urb->iso_frame_desc[0].offset = 0;
 286         cp[0] = subs->freqn;
 287         cp[1] = subs->freqn >> 8;
 288         cp[2] = subs->freqn >> 16;
 289         cp[3] = subs->freqn >> 24;
 290         return 0;
 291 }
 292
 293 /*
 294  * process after capture sync complete
 295  * - nothing to do
 296  */
 297 static int retire_capture_sync_urb(struct snd_usb_substream *subs,
 298                                    struct snd_pcm_runtime *runtime,
 299                                    struct urb *urb)
 300 {
 301         return 0;
 302 }
 303
 304 /*
 305  * prepare urb for capture data pipe
 306  *
 307  * fill the offset and length of each descriptor.
 308  *
 309  * we use a temporary buffer to write the captured data.
 310  * since the length of written data is determined by host, we cannot
 311  * write onto the pcm buffer directly...  the data is thus copied
 312  * later at complete callback to the global buffer.
 313  */
 314 static int prepare_capture_urb(struct snd_usb_substream *subs,
 315                                struct snd_pcm_runtime *runtime,
 316                                struct urb *urb)
 317 {
 318         int i, offs;
 319         struct snd_urb_ctx *ctx = urb->context;
 320
 321         offs = 0;
 322         urb->dev = ctx->subs->dev; /* we need to set this at each time */
 323         for (i = 0; i < ctx->packets; i++) {
 324                 urb->iso_frame_desc[i].offset = offs;
 325                 urb->iso_frame_desc[i].length = subs->curpacksize;
 326                 offs += subs->curpacksize;
 327         }
 328         urb->transfer_buffer_length = offs;
 329         urb->number_of_packets = ctx->packets;
 330         return 0;
 331 }
 332
 333 /*
 334  * process after capture complete
 335  *
 336  * copy the data from each desctiptor to the pcm buffer, and
 337  * update the current position.
 338  */
 339 static int retire_capture_urb(struct snd_usb_substream *subs,
 340                               struct snd_pcm_runtime *runtime,
 341                               struct urb *urb)
 342 {
 343         unsigned long flags;
 344         unsigned char *cp;
 345         int i;
 346         unsigned int stride, len, oldptr;
 347         int period_elapsed = 0;
 348
 349         stride = runtime->frame_bits >> 3;
 350
 351         for (i = 0; i < urb->number_of_packets; i++) {
 352                 cp = (unsigned char *)urb->transfer_buffer + urb->iso_frame_desc[i].offset;
 353                 if (urb->iso_frame_desc[i].status) {
 354                         snd_printd(KERN_ERR "frame %d active: %d\n", i, urb->iso_frame_desc[i].status);
 355                         // continue;
 356                 }
 357                 len = urb->iso_frame_desc[i].actual_length / stride;
 358                 if (! len)
 359                         continue;
 360                 /* update the current pointer */
 361                 spin_lock_irqsave(&subs->lock, flags);
 362                 oldptr = subs->hwptr_done;
 363                 subs->hwptr_done += len;
 364                 if (subs->hwptr_done >= runtime->buffer_size)
 365                         subs->hwptr_done -= runtime->buffer_size;
 366                 subs->transfer_done += len;
 367                 if (subs->transfer_done >= runtime->period_size) {
 368                         subs->transfer_done -= runtime->period_size;
 369                         period_elapsed = 1;
 370                 }
 371                 spin_unlock_irqrestore(&subs->lock, flags);
 372                 /* copy a data chunk */
 373                 if (oldptr + len > runtime->buffer_size) {
 374                         unsigned int cnt = runtime->buffer_size - oldptr;
 375                         unsigned int blen = cnt * stride;
 376                         memcpy(runtime->dma_area + oldptr * stride, cp, blen);
 377                         memcpy(runtime->dma_area, cp + blen, len * stride - blen);
 378                 } else {
 379                         memcpy(runtime->dma_area + oldptr * stride, cp, len * stride);
 380                 }
 381         }
 382         if (period_elapsed)
 383                 snd_pcm_period_elapsed(subs->pcm_substream);
 384         return 0;
 385 }
 386
 387 /*
 388  * Process after capture complete when paused.  Nothing to do.
 389  */
 390 static int retire_paused_capture_urb(struct snd_usb_substream *subs,
 391                                      struct snd_pcm_runtime *runtime,
 392                                      struct urb *urb)
 393 {
 394         return 0;
 395 }
 396
 397
 398 /*
 399  * prepare urb for full speed playback sync pipe
 400  *
 401  * set up the offset and length to receive the current frequency.
 402  */
 403
 404 static int prepare_playback_sync_urb(struct snd_usb_substream *subs,
 405                                      struct snd_pcm_runtime *runtime,
 406                                      struct urb *urb)
 407 {
 408         struct snd_urb_ctx *ctx = urb->context;
 409
 410         urb->dev = ctx->subs->dev; /* we need to set this at each time */
 411         urb->iso_frame_desc[0].length = 3;
 412         urb->iso_frame_desc[0].offset = 0;
 413         return 0;
 414 }
 415
 416 /*
 417  * prepare urb for high speed playback sync pipe
 418  *
 419  * set up the offset and length to receive the current frequency.
 420  */
 421
 422 static int prepare_playback_sync_urb_hs(struct snd_usb_substream *subs,
 423                                         struct snd_pcm_runtime *runtime,
 424                                         struct urb *urb)
 425 {
 426         struct snd_urb_ctx *ctx = urb->context;
 427
 428         urb->dev = ctx->subs->dev; /* we need to set this at each time */
 429         urb->iso_frame_desc[0].length = 4;
 430         urb->iso_frame_desc[0].offset = 0;
 431         return 0;
 432 }
 433
 434 /*
 435  * process after full speed playback sync complete
 436  *
 437  * retrieve the current 10.14 frequency from pipe, and set it.
 438  * the value is referred in prepare_playback_urb().
 439  */
 440 static int retire_playback_sync_urb(struct snd_usb_substream *subs,
 441                                     struct snd_pcm_runtime *runtime,
 442                                     struct urb *urb)
 443 {
 444         unsigned int f;
 445         unsigned long flags;
 446
 447         if (urb->iso_frame_desc[0].status == 0 &&
 448             urb->iso_frame_desc[0].actual_length == 3) {
 449                 f = combine_triple((u8*)urb->transfer_buffer) << 2;
 450                 if (f >= subs->freqn - subs->freqn / 8 && f <= subs->freqmax) {
 451                         spin_lock_irqsave(&subs->lock, flags);
 452                         subs->freqm = f;
 453                         spin_unlock_irqrestore(&subs->lock, flags);
 454                 }
 455         }
 456
 457         return 0;
 458 }
 459
 460 /*
 461  * process after high speed playback sync complete
 462  *
 463  * retrieve the current 12.13 frequency from pipe, and set it.
 464  * the value is referred in prepare_playback_urb().
 465  */
 466 static int retire_playback_sync_urb_hs(struct snd_usb_substream *subs,
 467                                        struct snd_pcm_runtime *runtime,
 468                                        struct urb *urb)
 469 {
 470         unsigned int f;
 471         unsigned long flags;
 472
 473         if (urb->iso_frame_desc[0].status == 0 &&
 474             urb->iso_frame_desc[0].actual_length == 4) {
 475                 f = combine_quad((u8*)urb->transfer_buffer) & 0x0fffffff;
 476                 if (f >= subs->freqn - subs->freqn / 8 && f <= subs->freqmax) {
 477                         spin_lock_irqsave(&subs->lock, flags);
 478                         subs->freqm = f;
 479                         spin_unlock_irqrestore(&subs->lock, flags);
 480                 }
 481         }
 482
 483         return 0;
 484 }
 485
 486 /*
 487  * process after E-Mu 0202/0404 high speed playback sync complete
 488  *
 489  * These devices return the number of samples per packet instead of the number
 490  * of samples per microframe.
 491  */
 492 static int retire_playback_sync_urb_hs_emu(struct snd_usb_substream *subs,
 493                                            struct snd_pcm_runtime *runtime,
 494                                            struct urb *urb)
 495 {
 496         unsigned int f;
 497         unsigned long flags;
 498
 499         if (urb->iso_frame_desc[0].status == 0 &&
 500             urb->iso_frame_desc[0].actual_length == 4) {
 501                 f = combine_quad((u8*)urb->transfer_buffer) & 0x0fffffff;
 502                 f >>= subs->datainterval;
 503                 if (f >= subs->freqn - subs->freqn / 8 && f <= subs->freqmax) {
 504                         spin_lock_irqsave(&subs->lock, flags);
 505                         subs->freqm = f;
 506                         spin_unlock_irqrestore(&subs->lock, flags);
 507                 }
 508         }
 509
 510         return 0;
 511 }
 512
 513 /* determine the number of frames in the next packet */
 514 static int snd_usb_audio_next_packet_size(struct snd_usb_substream *subs)
 515 {
 516         if (subs->fill_max)
 517                 return subs->maxframesize;
 518         else {
 519                 subs->phase = (subs->phase & 0xffff)
 520                         + (subs->freqm << subs->datainterval);
 521                 return min(subs->phase >> 16, subs->maxframesize);
 522         }
 523 }
 524
 525 /*
 526  * Prepare urb for streaming before playback starts or when paused.
 527  *
 528  * We don't have any data, so we send a frame of silence.
 529  */
 530 static int prepare_nodata_playback_urb(struct snd_usb_substream *subs,
 531                                        struct snd_pcm_runtime *runtime,
 532                                        struct urb *urb)
 533 {
 534         unsigned int i, offs, counts;
 535         struct snd_urb_ctx *ctx = urb->context;
 536         int stride = runtime->frame_bits >> 3;
 537
 538         offs = 0;
 539         urb->dev = ctx->subs->dev;
 540         urb->number_of_packets = subs->packs_per_ms;
 541         for (i = 0; i < subs->packs_per_ms; ++i) {
 542                 counts = snd_usb_audio_next_packet_size(subs);
 543                 urb->iso_frame_desc[i].offset = offs * stride;
 544                 urb->iso_frame_desc[i].length = counts * stride;
 545                 offs += counts;
 546         }
 547         urb->transfer_buffer_length = offs * stride;
 548         memset(urb->transfer_buffer,
 549                subs->cur_audiofmt->format == SNDRV_PCM_FORMAT_U8 ? 0x80 : 0,
 550                offs * stride);
 551         return 0;
 552 }
 553
 554 /*
 555  * prepare urb for playback data pipe
 556  *
 557  * Since a URB can handle only a single linear buffer, we must use double
 558  * buffering when the data to be transferred overflows the buffer boundary.
 559  * To avoid inconsistencies when updating hwptr_done, we use double buffering
 560  * for all URBs.
 561  */
 562 static int prepare_playback_urb(struct snd_usb_substream *subs,
 563                                 struct snd_pcm_runtime *runtime,
 564                                 struct urb *urb)
 565 {
 566         int i, stride, offs;
 567         unsigned int counts;
 568         unsigned long flags;
 569         int period_elapsed = 0;
 570         struct snd_urb_ctx *ctx = urb->context;
 571
 572         stride = runtime->frame_bits >> 3;
 573
 574         offs = 0;
 575         urb->dev = ctx->subs->dev; /* we need to set this at each time */
 576         urb->number_of_packets = 0;
 577         spin_lock_irqsave(&subs->lock, flags);
 578         for (i = 0; i < ctx->packets; i++) {
 579                 counts = snd_usb_audio_next_packet_size(subs);
 580                 /* set up descriptor */
 581                 urb->iso_frame_desc[i].offset = offs * stride;
 582                 urb->iso_frame_desc[i].length = counts * stride;
 583                 offs += counts;
 584                 urb->number_of_packets++;
 585                 subs->transfer_done += counts;
 586                 if (subs->transfer_done >= runtime->period_size) {
 587                         subs->transfer_done -= runtime->period_size;
 588                         period_elapsed = 1;
 589                         if (subs->fmt_type == USB_FORMAT_TYPE_II) {
 590                                 if (subs->transfer_done > 0) {
 591                                         /* FIXME: fill-max mode is not
 592                                          * supported yet */
 593                                         offs -= subs->transfer_done;
 594                                         counts -= subs->transfer_done;
 595                                         urb->iso_frame_desc[i].length =
 596                                                 counts * stride;
 597                                         subs->transfer_done = 0;
 598                                 }
 599                                 i++;
 600                                 if (i < ctx->packets) {
 601                                         /* add a transfer delimiter */
 602                                         urb->iso_frame_desc[i].offset =
 603                                                 offs * stride;
 604                                         urb->iso_frame_desc[i].length = 0;
 605                                         urb->number_of_packets++;
 606                                 }
 607                                 break;
 608                         }
 609                 }
 610                 /* finish at the frame boundary at/after the period boundary */
 611                 if (period_elapsed &&
 612                     (i & (subs->packs_per_ms - 1)) == subs->packs_per_ms - 1)
 613                         break;
 614         }
 615         if (subs->hwptr_done + offs > runtime->buffer_size) {
 616                 /* err, the transferred area goes over buffer boundary. */
 617                 unsigned int len = runtime->buffer_size - subs->hwptr_done;
 618                 memcpy(urb->transfer_buffer,
 619                        runtime->dma_area + subs->hwptr_done * stride,
 620                        len * stride);
 621                 memcpy(urb->transfer_buffer + len * stride,
 622                        runtime->dma_area,
 623                        (offs - len) * stride);
 624         } else {
 625                 memcpy(urb->transfer_buffer,
 626                        runtime->dma_area + subs->hwptr_done * stride,
 627                        offs * stride);
 628         }
 629         subs->hwptr_done += offs;
 630         if (subs->hwptr_done >= runtime->buffer_size)
 631                 subs->hwptr_done -= runtime->buffer_size;
 632         spin_unlock_irqrestore(&subs->lock, flags);
 633         urb->transfer_buffer_length = offs * stride;
 634         if (period_elapsed)
 635                 snd_pcm_period_elapsed(subs->pcm_substream);
 636         return 0;
 637 }
 638
 639 /*
 640  * process after playback data complete
 641  * - nothing to do
 642  */
 643 static int retire_playback_urb(struct snd_usb_substream *subs,
 644                                struct snd_pcm_runtime *runtime,
 645                                struct urb *urb)
 646 {
 647         return 0;
 648 }
 649
 650
 651 /*
 652  */
 653 static struct snd_urb_ops audio_urb_ops[2] = {
 654         {
 655                 .prepare =      prepare_nodata_playback_urb,
 656                 .retire =       retire_playback_urb,
 657                 .prepare_sync = prepare_playback_sync_urb,
 658                 .retire_sync =  retire_playback_sync_urb,
 659         },
 660         {
 661                 .prepare =      prepare_capture_urb,
 662                 .retire =       retire_capture_urb,
 663                 .prepare_sync = prepare_capture_sync_urb,
 664                 .retire_sync =  retire_capture_sync_urb,
 665         },
 666 };
 667
 668 static struct snd_urb_ops audio_urb_ops_high_speed[2] = {
 669         {
 670                 .prepare =      prepare_nodata_playback_urb,
 671                 .retire =       retire_playback_urb,
 672                 .prepare_sync = prepare_playback_sync_urb_hs,
 673                 .retire_sync =  retire_playback_sync_urb_hs,
 674         },
 675         {
 676                 .prepare =      prepare_capture_urb,
 677                 .retire =       retire_capture_urb,
 678                 .prepare_sync = prepare_capture_sync_urb_hs,
 679                 .retire_sync =  retire_capture_sync_urb,
 680         },
 681 };
 682
 683 /*
 684  * complete callback from data urb
 685  */
 686 static void snd_complete_urb(struct urb *urb)
 687 {
 688         struct snd_urb_ctx *ctx = urb->context;
 689         struct snd_usb_substream *subs = ctx->subs;
 690         struct snd_pcm_substream *substream = ctx->subs->pcm_substream;
 691         int err = 0;
 692
 693         if ((subs->running && subs->ops.retire(subs, substream->runtime, urb)) ||
 694             !subs->running || /* can be stopped during retire callback */
 695             (err = subs->ops.prepare(subs, substream->runtime, urb)) < 0 ||
 696             (err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
 697                 clear_bit(ctx->index, &subs->active_mask);
 698                 if (err < 0) {
 699                         snd_printd(KERN_ERR "cannot submit urb (err = %d)\n", err);
 700                         snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
 701                 }
 702         }
 703 }
 704
 705
 706 /*
 707  * complete callback from sync urb
 708  */
 709 static void snd_complete_sync_urb(struct urb *urb)
 710 {
 711         struct snd_urb_ctx *ctx = urb->context;
 712         struct snd_usb_substream *subs = ctx->subs;
 713         struct snd_pcm_substream *substream = ctx->subs->pcm_substream;
 714         int err = 0;
 715
 716         if ((subs->running && subs->ops.retire_sync(subs, substream->runtime, urb)) ||
 717             !subs->running || /* can be stopped during retire callback */
 718             (err = subs->ops.prepare_sync(subs, substream->runtime, urb)) < 0 ||
 719             (err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
 720                 clear_bit(ctx->index + 16, &subs->active_mask);
 721                 if (err < 0) {
 722                         snd_printd(KERN_ERR "cannot submit sync urb (err = %d)\n", err);
 723                         snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
 724                 }
 725         }
 726 }
 727
 728
 729 /* get the physical page pointer at the given offset */
 730 static struct page *snd_pcm_get_vmalloc_page(struct snd_pcm_substream *subs,
 731                                              unsigned long offset)
 732 {
 733         void *pageptr = subs->runtime->dma_area + offset;
 734         return vmalloc_to_page(pageptr);
 735 }
 736
 737 /* allocate virtual buffer; may be called more than once */
 738 static int snd_pcm_alloc_vmalloc_buffer(struct snd_pcm_substream *subs, size_t size)
 739 {
 740         struct snd_pcm_runtime *runtime = subs->runtime;
 741         if (runtime->dma_area) {
 742                 if (runtime->dma_bytes >= size)
 743                         return 0; /* already large enough */
 744                 vfree(runtime->dma_area);
 745         }
 746         runtime->dma_area = vmalloc(size);
 747         if (!runtime->dma_area)
 748                 return -ENOMEM;
 749         runtime->dma_bytes = size;
 750         return 0;
 751 }
 752
 753 /* free virtual buffer; may be called more than once */
 754 static int snd_pcm_free_vmalloc_buffer(struct snd_pcm_substream *subs)
 755 {
 756         struct snd_pcm_runtime *runtime = subs->runtime;
 757
 758         vfree(runtime->dma_area);
 759         runtime->dma_area = NULL;
 760         return 0;
 761 }
 762
 763
 764 /*
 765  * unlink active urbs.
 766  */
 767 static int deactivate_urbs(struct snd_usb_substream *subs, int force, int can_sleep)
 768 {
 769         unsigned int i;
 770         int async;
 771
 772         subs->running = 0;
 773
 774         if (!force && subs->stream->chip->shutdown) /* to be sure... */
 775                 return -EBADFD;
 776
 777         async = !can_sleep && async_unlink;
 778
 779         if (!async && in_interrupt())
 780                 return 0;
 781
 782         for (i = 0; i < subs->nurbs; i++) {
 783                 if (test_bit(i, &subs->active_mask)) {
 784                         if (!test_and_set_bit(i, &subs->unlink_mask)) {
 785                                 struct urb *u = subs->dataurb[i].urb;
 786                                 if (async)
 787                                         usb_unlink_urb(u);
 788                                 else
 789                                         usb_kill_urb(u);
 790                         }
 791                 }
 792         }
 793         if (subs->syncpipe) {
 794                 for (i = 0; i < SYNC_URBS; i++) {
 795                         if (test_bit(i+16, &subs->active_mask)) {
 796                                 if (!test_and_set_bit(i+16, &subs->unlink_mask)) {
 797                                         struct urb *u = subs->syncurb[i].urb;
 798                                         if (async)
 799                                                 usb_unlink_urb(u);
 800                                         else
 801                                                 usb_kill_urb(u);
 802                                 }
 803                         }
 804                 }
 805         }
 806         return 0;
 807 }
 808
 809
 810 static const char *usb_error_string(int err)
 811 {
 812         switch (err) {
 813         case -ENODEV:
 814                 return "no device";
 815         case -ENOENT:
 816                 return "endpoint not enabled";
 817         case -EPIPE:
 818                 return "endpoint stalled";
 819         case -ENOSPC:
 820                 return "not enough bandwidth";
 821         case -ESHUTDOWN:
 822                 return "device disabled";
 823         case -EHOSTUNREACH:
 824                 return "device suspended";
 825         case -EINVAL:
 826         case -EAGAIN:
 827         case -EFBIG:
 828         case -EMSGSIZE:
 829                 return "internal error";
 830         default:
 831                 return "unknown error";
 832         }
 833 }
 834
 835 /*
 836  * set up and start data/sync urbs
 837  */
 838 static int start_urbs(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime)
 839 {
 840         unsigned int i;
 841         int err;
 842
 843         if (subs->stream->chip->shutdown)
 844                 return -EBADFD;
 845
 846         for (i = 0; i < subs->nurbs; i++) {
 847                 if (snd_BUG_ON(!subs->dataurb[i].urb))
 848                         return -EINVAL;
 849                 if (subs->ops.prepare(subs, runtime, subs->dataurb[i].urb) < 0) {
 850                         snd_printk(KERN_ERR "cannot prepare datapipe for urb %d\n", i);
 851                         goto __error;
 852                 }
 853         }
 854         if (subs->syncpipe) {
 855                 for (i = 0; i < SYNC_URBS; i++) {
 856                         if (snd_BUG_ON(!subs->syncurb[i].urb))
 857                                 return -EINVAL;
 858                         if (subs->ops.prepare_sync(subs, runtime, subs->syncurb[i].urb) < 0) {
 859                                 snd_printk(KERN_ERR "cannot prepare syncpipe for urb %d\n", i);
 860                                 goto __error;
 861                         }
 862                 }
 863         }
 864
 865         subs->active_mask = 0;
 866         subs->unlink_mask = 0;
 867         subs->running = 1;
 868         for (i = 0; i < subs->nurbs; i++) {
 869                 err = usb_submit_urb(subs->dataurb[i].urb, GFP_ATOMIC);
 870                 if (err < 0) {
 871                         snd_printk(KERN_ERR "cannot submit datapipe "
 872                                    "for urb %d, error %d: %s\n",
 873                                    i, err, usb_error_string(err));
 874                         goto __error;
 875                 }
 876                 set_bit(i, &subs->active_mask);
 877         }
 878         if (subs->syncpipe) {
 879                 for (i = 0; i < SYNC_URBS; i++) {
 880                         err = usb_submit_urb(subs->syncurb[i].urb, GFP_ATOMIC);
 881                         if (err < 0) {
 882                                 snd_printk(KERN_ERR "cannot submit syncpipe "
 883                                            "for urb %d, error %d: %s\n",
 884                                            i, err, usb_error_string(err));
 885                                 goto __error;
 886                         }
 887                         set_bit(i + 16, &subs->active_mask);
 888                 }
 889         }
 890         return 0;
 891
 892  __error:
 893         // snd_pcm_stop(subs->pcm_substream, SNDRV_PCM_STATE_XRUN);
 894         deactivate_urbs(subs, 0, 0);
 895         return -EPIPE;
 896 }
 897
 898
 899 /*
 900  *  wait until all urbs are processed.
 901  */
 902 static int wait_clear_urbs(struct snd_usb_substream *subs)
 903 {
 904         unsigned long end_time = jiffies + msecs_to_jiffies(1000);
 905         unsigned int i;
 906         int alive;
 907
 908         do {
 909                 alive = 0;
 910                 for (i = 0; i < subs->nurbs; i++) {
 911                         if (test_bit(i, &subs->active_mask))
 912                                 alive++;
 913                 }
 914                 if (subs->syncpipe) {
 915                         for (i = 0; i < SYNC_URBS; i++) {
 916                                 if (test_bit(i + 16, &subs->active_mask))
 917                                         alive++;
 918                         }
 919                 }
 920                 if (! alive)
 921                         break;
 922                 schedule_timeout_uninterruptible(1);
 923         } while (time_before(jiffies, end_time));
 924         if (alive)
 925                 snd_printk(KERN_ERR "timeout: still %d active urbs..\n", alive);
 926         return 0;
 927 }
 928
 929
 930 /*
 931  * return the current pcm pointer.  just return the hwptr_done value.
 932  */
 933 static snd_pcm_uframes_t snd_usb_pcm_pointer(struct snd_pcm_substream *substream)
 934 {
 935         struct snd_usb_substream *subs;
 936         snd_pcm_uframes_t hwptr_done;
 937
 938         subs = (struct snd_usb_substream *)substream->runtime->private_data;
 939         spin_lock(&subs->lock);
 940         hwptr_done = subs->hwptr_done;
 941         spin_unlock(&subs->lock);
 942         return hwptr_done;
 943 }
 944
 945
 946 /*
 947  * start/stop playback substream
 948  */
 949 static int snd_usb_pcm_playback_trigger(struct snd_pcm_substream *substream,
 950                                         int cmd)
 951 {
 952         struct snd_usb_substream *subs = substream->runtime->private_data;
 953
 954         switch (cmd) {
 955         case SNDRV_PCM_TRIGGER_START:
 956         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 957                 subs->ops.prepare = prepare_playback_urb;
 958                 return 0;
 959         case SNDRV_PCM_TRIGGER_STOP:
 960                 return deactivate_urbs(subs, 0, 0);
 961         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 962                 subs->ops.prepare = prepare_nodata_playback_urb;
 963                 return 0;
 964         default:
 965                 return -EINVAL;
 966         }
 967 }
 968
 969 /*
 970  * start/stop capture substream
 971  */
 972 static int snd_usb_pcm_capture_trigger(struct snd_pcm_substream *substream,
 973                                        int cmd)
 974 {
 975         struct snd_usb_substream *subs = substream->runtime->private_data;
 976
 977         switch (cmd) {
 978         case SNDRV_PCM_TRIGGER_START:
 979                 subs->ops.retire = retire_capture_urb;
 980                 return start_urbs(subs, substream->runtime);
 981         case SNDRV_PCM_TRIGGER_STOP:
 982                 return deactivate_urbs(subs, 0, 0);
 983         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 984                 subs->ops.retire = retire_paused_capture_urb;
 985                 return 0;
 986         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 987                 subs->ops.retire = retire_capture_urb;
 988                 return 0;
 989         default:
 990                 return -EINVAL;
 991         }
 992 }
 993
 994
 995 /*
 996  * release a urb data
 997  */
 998 static void release_urb_ctx(struct snd_urb_ctx *u)
 999 {
1000         if (u->urb) {
1001                 if (u->buffer_size)
1002                         usb_buffer_free(u->subs->dev, u->buffer_size,
1003                                         u->urb->transfer_buffer,
1004                                         u->urb->transfer_dma);
1005                 usb_free_urb(u->urb);
1006                 u->urb = NULL;
1007         }
1008 }
1009
1010 /*
1011  * release a substream
1012  */
1013 static void release_substream_urbs(struct snd_usb_substream *subs, int force)
1014 {
1015         int i;
1016
1017         /* stop urbs (to be sure) */
1018         deactivate_urbs(subs, force, 1);
1019         wait_clear_urbs(subs);
1020
1021         for (i = 0; i < MAX_URBS; i++)
1022                 release_urb_ctx(&subs->dataurb[i]);
1023         for (i = 0; i < SYNC_URBS; i++)
1024                 release_urb_ctx(&subs->syncurb[i]);
1025         usb_buffer_free(subs->dev, SYNC_URBS * 4,
1026                         subs->syncbuf, subs->sync_dma);
1027         subs->syncbuf = NULL;
1028         subs->nurbs = 0;
1029 }
1030
1031 /*
1032  * initialize a substream for plaback/capture
1033  */
1034 static int init_substream_urbs(struct snd_usb_substream *subs, unsigned int period_bytes,
1035                                unsigned int rate, unsigned int frame_bits)
1036 {
1037         unsigned int maxsize, n, i;
1038         int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK;
1039         unsigned int npacks[MAX_URBS], urb_packs, total_packs, packs_per_ms;
1040
1041         /* calculate the frequency in 16.16 format */
1042         if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
1043                 subs->freqn = get_usb_full_speed_rate(rate);
1044         else
1045                 subs->freqn = get_usb_high_speed_rate(rate);
1046         subs->freqm = subs->freqn;
1047         /* calculate max. frequency */
1048         if (subs->maxpacksize) {
1049                 /* whatever fits into a max. size packet */
1050                 maxsize = subs->maxpacksize;
1051                 subs->freqmax = (maxsize / (frame_bits >> 3))
1052                                 << (16 - subs->datainterval);
1053         } else {
1054                 /* no max. packet size: just take 25% higher than nominal */
1055                 subs->freqmax = subs->freqn + (subs->freqn >> 2);
1056                 maxsize = ((subs->freqmax + 0xffff) * (frame_bits >> 3))
1057                                 >> (16 - subs->datainterval);
1058         }
1059         subs->phase = 0;
1060
1061         if (subs->fill_max)
1062                 subs->curpacksize = subs->maxpacksize;
1063         else
1064                 subs->curpacksize = maxsize;
1065
1066         if (snd_usb_get_speed(subs->dev) == USB_SPEED_HIGH)
1067                 packs_per_ms = 8 >> subs->datainterval;
1068         else
1069                 packs_per_ms = 1;
1070         subs->packs_per_ms = packs_per_ms;
1071
1072         if (is_playback) {
1073                 urb_packs = nrpacks;
1074                 urb_packs = max(urb_packs, (unsigned int)MIN_PACKS_URB);
1075                 urb_packs = min(urb_packs, (unsigned int)MAX_PACKS);
1076         } else
1077                 urb_packs = 1;
1078         urb_packs *= packs_per_ms;
1079
1080         /* decide how many packets to be used */
1081         if (is_playback) {
1082                 unsigned int minsize;
1083                 /* determine how small a packet can be */
1084                 minsize = (subs->freqn >> (16 - subs->datainterval))
1085                           * (frame_bits >> 3);
1086                 /* with sync from device, assume it can be 12% lower */
1087                 if (subs->syncpipe)
1088                         minsize -= minsize >> 3;
1089                 minsize = max(minsize, 1u);
1090                 total_packs = (period_bytes + minsize - 1) / minsize;
1091                 /* round up to multiple of packs_per_ms */
1092                 total_packs = (total_packs + packs_per_ms - 1)
1093                                 & ~(packs_per_ms - 1);
1094                 /* we need at least two URBs for queueing */
1095                 if (total_packs < 2 * MIN_PACKS_URB * packs_per_ms)
1096                         total_packs = 2 * MIN_PACKS_URB * packs_per_ms;
1097         } else {
1098                 total_packs = MAX_URBS * urb_packs;
1099         }
1100         subs->nurbs = (total_packs + urb_packs - 1) / urb_packs;
1101         if (subs->nurbs > MAX_URBS) {
1102                 /* too much... */
1103                 subs->nurbs = MAX_URBS;
1104                 total_packs = MAX_URBS * urb_packs;
1105         }
1106         n = total_packs;
1107         for (i = 0; i < subs->nurbs; i++) {
1108                 npacks[i] = n > urb_packs ? urb_packs : n;
1109                 n -= urb_packs;
1110         }
1111         if (subs->nurbs <= 1) {
1112                 /* too little - we need at least two packets
1113                  * to ensure contiguous playback/capture
1114                  */
1115                 subs->nurbs = 2;
1116                 npacks[0] = (total_packs + 1) / 2;
1117                 npacks[1] = total_packs - npacks[0];
1118         } else if (npacks[subs->nurbs-1] < MIN_PACKS_URB * packs_per_ms) {
1119                 /* the last packet is too small.. */
1120                 if (subs->nurbs > 2) {
1121                         /* merge to the first one */
1122                         npacks[0] += npacks[subs->nurbs - 1];
1123                         subs->nurbs--;
1124                 } else {
1125                         /* divide to two */
1126                         subs->nurbs = 2;
1127                         npacks[0] = (total_packs + 1) / 2;
1128                         npacks[1] = total_packs - npacks[0];
1129                 }
1130         }
1131
1132         /* allocate and initialize data urbs */
1133         for (i = 0; i < subs->nurbs; i++) {
1134                 struct snd_urb_ctx *u = &subs->dataurb[i];
1135                 u->index = i;
1136                 u->subs = subs;
1137                 u->packets = npacks[i];
1138                 u->buffer_size = maxsize * u->packets;
1139                 if (subs->fmt_type == USB_FORMAT_TYPE_II)
1140                         u->packets++; /* for transfer delimiter */
1141                 u->urb = usb_alloc_urb(u->packets, GFP_KERNEL);
1142                 if (!u->urb)
1143                         goto out_of_memory;
1144                 u->urb->transfer_buffer =
1145                         usb_buffer_alloc(subs->dev, u->buffer_size, GFP_KERNEL,
1146                                          &u->urb->transfer_dma);
1147                 if (!u->urb->transfer_buffer)
1148                         goto out_of_memory;
1149                 u->urb->pipe = subs->datapipe;
1150                 u->urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
1151                 u->urb->interval = 1 << subs->datainterval;
1152                 u->urb->context = u;
1153                 u->urb->complete = snd_complete_urb;
1154         }
1155
1156         if (subs->syncpipe) {
1157                 /* allocate and initialize sync urbs */
1158                 subs->syncbuf = usb_buffer_alloc(subs->dev, SYNC_URBS * 4,
1159                                                  GFP_KERNEL, &subs->sync_dma);
1160                 if (!subs->syncbuf)
1161                         goto out_of_memory;
1162                 for (i = 0; i < SYNC_URBS; i++) {
1163                         struct snd_urb_ctx *u = &subs->syncurb[i];
1164                         u->index = i;
1165                         u->subs = subs;
1166                         u->packets = 1;
1167                         u->urb = usb_alloc_urb(1, GFP_KERNEL);
1168                         if (!u->urb)
1169                                 goto out_of_memory;
1170                         u->urb->transfer_buffer = subs->syncbuf + i * 4;
1171                         u->urb->transfer_dma = subs->sync_dma + i * 4;
1172                         u->urb->transfer_buffer_length = 4;
1173                         u->urb->pipe = subs->syncpipe;
1174                         u->urb->transfer_flags = URB_ISO_ASAP |
1175                                                  URB_NO_TRANSFER_DMA_MAP;
1176                         u->urb->number_of_packets = 1;
1177                         u->urb->interval = 1 << subs->syncinterval;
1178                         u->urb->context = u;
1179                         u->urb->complete = snd_complete_sync_urb;
1180                 }
1181         }
1182         return 0;
1183
1184 out_of_memory:
1185         release_substream_urbs(subs, 0);
1186         return -ENOMEM;
1187 }
1188
1189
1190 /*
1191  * find a matching audio format
1192  */
1193 static struct audioformat *find_format(struct snd_usb_substream *subs, unsigned int format,
1194                                        unsigned int rate, unsigned int channels)
1195 {
1196         struct list_head *p;
1197         struct audioformat *found = NULL;
1198         int cur_attr = 0, attr;
1199
1200         list_for_each(p, &subs->fmt_list) {
1201                 struct audioformat *fp;
1202                 fp = list_entry(p, struct audioformat, list);
1203                 if (fp->format != format || fp->channels != channels)
1204                         continue;
1205                 if (rate < fp->rate_min || rate > fp->rate_max)
1206                         continue;
1207                 if (! (fp->rates & SNDRV_PCM_RATE_CONTINUOUS)) {
1208                         unsigned int i;
1209                         for (i = 0; i < fp->nr_rates; i++)
1210                                 if (fp->rate_table[i] == rate)
1211                                         break;
1212                         if (i >= fp->nr_rates)
1213                                 continue;
1214                 }
1215                 attr = fp->ep_attr & EP_ATTR_MASK;
1216                 if (! found) {
1217                         found = fp;
1218                         cur_attr = attr;
1219                         continue;
1220                 }
1221                 /* avoid async out and adaptive in if the other method
1222                  * supports the same format.
1223                  * this is a workaround for the case like
1224                  * M-audio audiophile USB.
1225                  */
1226                 if (attr != cur_attr) {
1227                         if ((attr == EP_ATTR_ASYNC &&
1228                              subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
1229                             (attr == EP_ATTR_ADAPTIVE &&
1230                              subs->direction == SNDRV_PCM_STREAM_CAPTURE))
1231                                 continue;
1232                         if ((cur_attr == EP_ATTR_ASYNC &&
1233                              subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
1234                             (cur_attr == EP_ATTR_ADAPTIVE &&
1235                              subs->direction == SNDRV_PCM_STREAM_CAPTURE)) {
1236                                 found = fp;
1237                                 cur_attr = attr;
1238                                 continue;
1239                         }
1240                 }
1241                 /* find the format with the largest max. packet size */
1242                 if (fp->maxpacksize > found->maxpacksize) {
1243                         found = fp;
1244                         cur_attr = attr;
1245                 }
1246         }
1247         return found;
1248 }
1249
1250
1251 /*
1252  * initialize the picth control and sample rate
1253  */
1254 static int init_usb_pitch(struct usb_device *dev, int iface,
1255                           struct usb_host_interface *alts,
1256                           struct audioformat *fmt)
1257 {
1258         unsigned int ep;
1259         unsigned char data[1];
1260         int err;
1261
1262         ep = get_endpoint(alts, 0)->bEndpointAddress;
1263         /* if endpoint has pitch control, enable it */
1264         if (fmt->attributes & EP_CS_ATTR_PITCH_CONTROL) {
1265                 data[0] = 1;
1266                 if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR,
1267                                            USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
1268                                            PITCH_CONTROL << 8, ep, data, 1, 1000)) < 0) {
1269                         snd_printk(KERN_ERR "%d:%d:%d: cannot set enable PITCH\n",
1270                                    dev->devnum, iface, ep);
1271                         return err;
1272                 }
1273         }
1274         return 0;
1275 }
1276
1277 static int init_usb_sample_rate(struct usb_device *dev, int iface,
1278                                 struct usb_host_interface *alts,
1279                                 struct audioformat *fmt, int rate)
1280 {
1281         unsigned int ep;
1282         unsigned char data[3];
1283         int err;
1284
1285         ep = get_endpoint(alts, 0)->bEndpointAddress;
1286         /* if endpoint has sampling rate control, set it */
1287         if (fmt->attributes & EP_CS_ATTR_SAMPLE_RATE) {
1288                 int crate;
1289                 data[0] = rate;
1290                 data[1] = rate >> 8;
1291                 data[2] = rate >> 16;
1292                 if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR,
1293                                            USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
1294                                            SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) {
1295                         snd_printk(KERN_ERR "%d:%d:%d: cannot set freq %d to ep 0x%x\n",
1296                                    dev->devnum, iface, fmt->altsetting, rate, ep);
1297                         return err;
1298                 }
1299                 if ((err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR,
1300                                            USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_IN,
1301                                            SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) {
1302                         snd_printk(KERN_WARNING "%d:%d:%d: cannot get freq at ep 0x%x\n",
1303                                    dev->devnum, iface, fmt->altsetting, ep);
1304                         return 0; /* some devices don't support reading */
1305                 }
1306                 crate = data[0] | (data[1] << 8) | (data[2] << 16);
1307                 if (crate != rate) {
1308                         snd_printd(KERN_WARNING "current rate %d is different from the runtime rate %d\n", crate, rate);
1309                         // runtime->rate = crate;
1310                 }
1311         }
1312         return 0;
1313 }
1314
1315 /*
1316  * find a matching format and set up the interface
1317  */
1318 static int set_format(struct snd_usb_substream *subs, struct audioformat *fmt)
1319 {
1320         struct usb_device *dev = subs->dev;
1321         struct usb_host_interface *alts;
1322         struct usb_interface_descriptor *altsd;
1323         struct usb_interface *iface;
1324         unsigned int ep, attr;
1325         int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK;
1326         int err;
1327
1328         iface = usb_ifnum_to_if(dev, fmt->iface);
1329         if (WARN_ON(!iface))
1330                 return -EINVAL;
1331         alts = &iface->altsetting[fmt->altset_idx];
1332         altsd = get_iface_desc(alts);
1333         if (WARN_ON(altsd->bAlternateSetting != fmt->altsetting))
1334                 return -EINVAL;
1335
1336         if (fmt == subs->cur_audiofmt)
1337                 return 0;
1338
1339         /* close the old interface */
1340         if (subs->interface >= 0 && subs->interface != fmt->iface) {
1341                 if (usb_set_interface(subs->dev, subs->interface, 0) < 0) {
1342                         snd_printk(KERN_ERR "%d:%d:%d: return to setting 0 failed\n",
1343                                 dev->devnum, fmt->iface, fmt->altsetting);
1344                         return -EIO;
1345                 }
1346                 subs->interface = -1;
1347                 subs->format = 0;
1348         }
1349
1350         /* set interface */
1351         if (subs->interface != fmt->iface || subs->format != fmt->altset_idx) {
1352                 if (usb_set_interface(dev, fmt->iface, fmt->altsetting) < 0) {
1353                         snd_printk(KERN_ERR "%d:%d:%d: usb_set_interface failed\n",
1354                                    dev->devnum, fmt->iface, fmt->altsetting);
1355                         return -EIO;
1356                 }
1357                 snd_printdd(KERN_INFO "setting usb interface %d:%d\n", fmt->iface, fmt->altsetting);
1358                 subs->interface = fmt->iface;
1359                 subs->format = fmt->altset_idx;
1360         }
1361
1362         /* create a data pipe */
1363         ep = fmt->endpoint & USB_ENDPOINT_NUMBER_MASK;
1364         if (is_playback)
1365                 subs->datapipe = usb_sndisocpipe(dev, ep);
1366         else
1367                 subs->datapipe = usb_rcvisocpipe(dev, ep);
1368         if (snd_usb_get_speed(subs->dev) == USB_SPEED_HIGH &&
1369             get_endpoint(alts, 0)->bInterval >= 1 &&
1370             get_endpoint(alts, 0)->bInterval <= 4)
1371                 subs->datainterval = get_endpoint(alts, 0)->bInterval - 1;
1372         else
1373                 subs->datainterval = 0;
1374         subs->syncpipe = subs->syncinterval = 0;
1375         subs->maxpacksize = fmt->maxpacksize;
1376         subs->fill_max = 0;
1377
1378         /* we need a sync pipe in async OUT or adaptive IN mode */
1379         /* check the number of EP, since some devices have broken
1380          * descriptors which fool us.  if it has only one EP,
1381          * assume it as adaptive-out or sync-in.
1382          */
1383         attr = fmt->ep_attr & EP_ATTR_MASK;
1384         if (((is_playback && attr == EP_ATTR_ASYNC) ||
1385              (! is_playback && attr == EP_ATTR_ADAPTIVE)) &&
1386             altsd->bNumEndpoints >= 2) {
1387                 /* check sync-pipe endpoint */
1388                 /* ... and check descriptor size before accessing bSynchAddress
1389                    because there is a version of the SB Audigy 2 NX firmware lacking
1390                    the audio fields in the endpoint descriptors */
1391                 if ((get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != 0x01 ||
1392                     (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
1393                      get_endpoint(alts, 1)->bSynchAddress != 0)) {
1394                         snd_printk(KERN_ERR "%d:%d:%d : invalid synch pipe\n",
1395                                    dev->devnum, fmt->iface, fmt->altsetting);
1396                         return -EINVAL;
1397                 }
1398                 ep = get_endpoint(alts, 1)->bEndpointAddress;
1399                 if (get_endpoint(alts, 0)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
1400                     (( is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress | USB_DIR_IN)) ||
1401                      (!is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress & ~USB_DIR_IN)))) {
1402                         snd_printk(KERN_ERR "%d:%d:%d : invalid synch pipe\n",
1403                                    dev->devnum, fmt->iface, fmt->altsetting);
1404                         return -EINVAL;
1405                 }
1406                 ep &= USB_ENDPOINT_NUMBER_MASK;
1407                 if (is_playback)
1408                         subs->syncpipe = usb_rcvisocpipe(dev, ep);
1409                 else
1410                         subs->syncpipe = usb_sndisocpipe(dev, ep);
1411                 if (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
1412                     get_endpoint(alts, 1)->bRefresh >= 1 &&
1413                     get_endpoint(alts, 1)->bRefresh <= 9)
1414                         subs->syncinterval = get_endpoint(alts, 1)->bRefresh;
1415                 else if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
1416                         subs->syncinterval = 1;
1417                 else if (get_endpoint(alts, 1)->bInterval >= 1 &&
1418                          get_endpoint(alts, 1)->bInterval <= 16)
1419                         subs->syncinterval = get_endpoint(alts, 1)->bInterval - 1;
1420                 else
1421                         subs->syncinterval = 3;
1422         }
1423
1424         /* always fill max packet size */
1425         if (fmt->attributes & EP_CS_ATTR_FILL_MAX)
1426                 subs->fill_max = 1;
1427
1428         if ((err = init_usb_pitch(dev, subs->interface, alts, fmt)) < 0)
1429                 return err;
1430
1431         subs->cur_audiofmt = fmt;
1432
1433 #if 0
1434         printk("setting done: format = %d, rate = %d..%d, channels = %d\n",
1435                fmt->format, fmt->rate_min, fmt->rate_max, fmt->channels);
1436         printk("  datapipe = 0x%0x, syncpipe = 0x%0x\n",
1437                subs->datapipe, subs->syncpipe);
1438 #endif
1439
1440         return 0;
1441 }
1442
1443 /*
1444  * hw_params callback
1445  *
1446  * allocate a buffer and set the given audio format.
1447  *
1448  * so far we use a physically linear buffer although packetize transfer
1449  * doesn't need a continuous area.
1450  * if sg buffer is supported on the later version of alsa, we'll follow
1451  * that.
1452  */
1453 static int snd_usb_hw_params(struct snd_pcm_substream *substream,
1454                              struct snd_pcm_hw_params *hw_params)
1455 {
1456         struct snd_usb_substream *subs = substream->runtime->private_data;
1457         struct audioformat *fmt;
1458         unsigned int channels, rate, format;
1459         int ret, changed;
1460
1461         ret = snd_pcm_alloc_vmalloc_buffer(substream,
1462                                            params_buffer_bytes(hw_params));
1463         if (ret < 0)
1464                 return ret;
1465
1466         format = params_format(hw_params);
1467         rate = params_rate(hw_params);
1468         channels = params_channels(hw_params);
1469         fmt = find_format(subs, format, rate, channels);
1470         if (!fmt) {
1471                 snd_printd(KERN_DEBUG "cannot set format: format = 0x%x, rate = %d, channels = %d\n",
1472                            format, rate, channels);
1473                 return -EINVAL;
1474         }
1475
1476         changed = subs->cur_audiofmt != fmt ||
1477                 subs->period_bytes != params_period_bytes(hw_params) ||
1478                 subs->cur_rate != rate;
1479         if ((ret = set_format(subs, fmt)) < 0)
1480                 return ret;
1481
1482         if (subs->cur_rate != rate) {
1483                 struct usb_host_interface *alts;
1484                 struct usb_interface *iface;
1485                 iface = usb_ifnum_to_if(subs->dev, fmt->iface);
1486                 alts = &iface->altsetting[fmt->altset_idx];
1487                 ret = init_usb_sample_rate(subs->dev, subs->interface, alts, fmt, rate);
1488                 if (ret < 0)
1489                         return ret;
1490                 subs->cur_rate = rate;
1491         }
1492
1493         if (changed) {
1494                 /* format changed */
1495                 release_substream_urbs(subs, 0);
1496                 /* influenced: period_bytes, channels, rate, format, */
1497                 ret = init_substream_urbs(subs, params_period_bytes(hw_params),
1498                                           params_rate(hw_params),
1499                                           snd_pcm_format_physical_width(params_format(hw_params)) * params_channels(hw_params));
1500         }
1501
1502         return ret;
1503 }
1504
1505 /*
1506  * hw_free callback
1507  *
1508  * reset the audio format and release the buffer
1509  */
1510 static int snd_usb_hw_free(struct snd_pcm_substream *substream)
1511 {
1512         struct snd_usb_substream *subs = substream->runtime->private_data;
1513
1514         subs->cur_audiofmt = NULL;
1515         subs->cur_rate = 0;
1516         subs->period_bytes = 0;
1517         if (!subs->stream->chip->shutdown)
1518                 release_substream_urbs(subs, 0);
1519         return snd_pcm_free_vmalloc_buffer(substream);
1520 }
1521
1522 /*
1523  * prepare callback
1524  *
1525  * only a few subtle things...
1526  */
1527 static int snd_usb_pcm_prepare(struct snd_pcm_substream *substream)
1528 {
1529         struct snd_pcm_runtime *runtime = substream->runtime;
1530         struct snd_usb_substream *subs = runtime->private_data;
1531
1532         if (! subs->cur_audiofmt) {
1533                 snd_printk(KERN_ERR "usbaudio: no format is specified!\n");
1534                 return -ENXIO;
1535         }
1536
1537         /* some unit conversions in runtime */
1538         subs->maxframesize = bytes_to_frames(runtime, subs->maxpacksize);
1539         subs->curframesize = bytes_to_frames(runtime, subs->curpacksize);
1540
1541         /* reset the pointer */
1542         subs->hwptr_done = 0;
1543         subs->transfer_done = 0;
1544         subs->phase = 0;
1545
1546         /* clear urbs (to be sure) */
1547         deactivate_urbs(subs, 0, 1);
1548         wait_clear_urbs(subs);
1549
1550         /* for playback, submit the URBs now; otherwise, the first hwptr_done
1551          * updates for all URBs would happen at the same time when starting */
1552         if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK) {
1553                 subs->ops.prepare = prepare_nodata_playback_urb;
1554                 return start_urbs(subs, runtime);
1555         } else
1556                 return 0;
1557 }
1558
1559 static struct snd_pcm_hardware snd_usb_hardware =
1560 {
1561         .info =                 SNDRV_PCM_INFO_MMAP |
1562                                 SNDRV_PCM_INFO_MMAP_VALID |
1563                                 SNDRV_PCM_INFO_BATCH |
1564                                 SNDRV_PCM_INFO_INTERLEAVED |
1565                                 SNDRV_PCM_INFO_BLOCK_TRANSFER |
1566                                 SNDRV_PCM_INFO_PAUSE,
1567         .buffer_bytes_max =     1024 * 1024,
1568         .period_bytes_min =     64,
1569         .period_bytes_max =     512 * 1024,
1570         .periods_min =          2,
1571         .periods_max =          1024,
1572 };
1573
1574 /*
1575  * h/w constraints
1576  */
1577
1578 #ifdef HW_CONST_DEBUG
1579 #define hwc_debug(fmt, args...) printk(KERN_DEBUG fmt, ##args)
1580 #else
1581 #define hwc_debug(fmt, args...) /**/
1582 #endif
1583
1584 static int hw_check_valid_format(struct snd_pcm_hw_params *params, struct audioformat *fp)
1585 {
1586         struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
1587         struct snd_interval *ct = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
1588         struct snd_mask *fmts = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1589
1590         /* check the format */
1591         if (!snd_mask_test(fmts, fp->format)) {
1592                 hwc_debug("   > check: no supported format %d\n", fp->format);
1593                 return 0;
1594         }
1595         /* check the channels */
1596         if (fp->channels < ct->min || fp->channels > ct->max) {
1597                 hwc_debug("   > check: no valid channels %d (%d/%d)\n", fp->channels, ct->min, ct->max);
1598                 return 0;
1599         }
1600         /* check the rate is within the range */
1601         if (fp->rate_min > it->max || (fp->rate_min == it->max && it->openmax)) {
1602                 hwc_debug("   > check: rate_min %d > max %d\n", fp->rate_min, it->max);
1603                 return 0;
1604         }
1605         if (fp->rate_max < it->min || (fp->rate_max == it->min && it->openmin)) {
1606                 hwc_debug("   > check: rate_max %d < min %d\n", fp->rate_max, it->min);
1607                 return 0;
1608         }
1609         return 1;
1610 }
1611
1612 static int hw_rule_rate(struct snd_pcm_hw_params *params,
1613                         struct snd_pcm_hw_rule *rule)
1614 {
1615         struct snd_usb_substream *subs = rule->private;
1616         struct list_head *p;
1617         struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
1618         unsigned int rmin, rmax;
1619         int changed;
1620
1621         hwc_debug("hw_rule_rate: (%d,%d)\n", it->min, it->max);
1622         changed = 0;
1623         rmin = rmax = 0;
1624         list_for_each(p, &subs->fmt_list) {
1625                 struct audioformat *fp;
1626                 fp = list_entry(p, struct audioformat, list);
1627                 if (!hw_check_valid_format(params, fp))
1628                         continue;
1629                 if (changed++) {
1630                         if (rmin > fp->rate_min)
1631                                 rmin = fp->rate_min;
1632                         if (rmax < fp->rate_max)
1633                                 rmax = fp->rate_max;
1634                 } else {
1635                         rmin = fp->rate_min;
1636                         rmax = fp->rate_max;
1637                 }
1638         }
1639
1640         if (!changed) {
1641                 hwc_debug("  --> get empty\n");
1642                 it->empty = 1;
1643                 return -EINVAL;
1644         }
1645
1646         changed = 0;
1647         if (it->min < rmin) {
1648                 it->min = rmin;
1649                 it->openmin = 0;
1650                 changed = 1;
1651         }
1652         if (it->max > rmax) {
1653                 it->max = rmax;
1654                 it->openmax = 0;
1655                 changed = 1;
1656         }
1657         if (snd_interval_checkempty(it)) {
1658                 it->empty = 1;
1659                 return -EINVAL;
1660         }
1661         hwc_debug("  --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
1662         return changed;
1663 }
1664
1665
1666 static int hw_rule_channels(struct snd_pcm_hw_params *params,
1667                             struct snd_pcm_hw_rule *rule)
1668 {
1669         struct snd_usb_substream *subs = rule->private;
1670         struct list_head *p;
1671         struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
1672         unsigned int rmin, rmax;
1673         int changed;
1674
1675         hwc_debug("hw_rule_channels: (%d,%d)\n", it->min, it->max);
1676         changed = 0;
1677         rmin = rmax = 0;
1678         list_for_each(p, &subs->fmt_list) {
1679                 struct audioformat *fp;
1680                 fp = list_entry(p, struct audioformat, list);
1681                 if (!hw_check_valid_format(params, fp))
1682                         continue;
1683                 if (changed++) {
1684                         if (rmin > fp->channels)
1685                                 rmin = fp->channels;
1686                         if (rmax < fp->channels)
1687                                 rmax = fp->channels;
1688                 } else {
1689                         rmin = fp->channels;
1690                         rmax = fp->channels;
1691                 }
1692         }
1693
1694         if (!changed) {
1695                 hwc_debug("  --> get empty\n");
1696                 it->empty = 1;
1697                 return -EINVAL;
1698         }
1699
1700         changed = 0;
1701         if (it->min < rmin) {
1702                 it->min = rmin;
1703                 it->openmin = 0;
1704                 changed = 1;
1705         }
1706         if (it->max > rmax) {
1707                 it->max = rmax;
1708                 it->openmax = 0;
1709                 changed = 1;
1710         }
1711         if (snd_interval_checkempty(it)) {
1712                 it->empty = 1;
1713                 return -EINVAL;
1714         }
1715         hwc_debug("  --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
1716         return changed;
1717 }
1718
1719 static int hw_rule_format(struct snd_pcm_hw_params *params,
1720                           struct snd_pcm_hw_rule *rule)
1721 {
1722         struct snd_usb_substream *subs = rule->private;
1723         struct list_head *p;
1724         struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1725         u64 fbits;
1726         u32 oldbits[2];
1727         int changed;
1728
1729         hwc_debug("hw_rule_format: %x:%x\n", fmt->bits[0], fmt->bits[1]);
1730         fbits = 0;
1731         list_for_each(p, &subs->fmt_list) {
1732                 struct audioformat *fp;
1733                 fp = list_entry(p, struct audioformat, list);
1734                 if (!hw_check_valid_format(params, fp))
1735                         continue;
1736                 fbits |= (1ULL << fp->format);
1737         }
1738
1739         oldbits[0] = fmt->bits[0];
1740         oldbits[1] = fmt->bits[1];
1741         fmt->bits[0] &= (u32)fbits;
1742         fmt->bits[1] &= (u32)(fbits >> 32);
1743         if (!fmt->bits[0] && !fmt->bits[1]) {
1744                 hwc_debug("  --> get empty\n");
1745                 return -EINVAL;
1746         }
1747         changed = (oldbits[0] != fmt->bits[0] || oldbits[1] != fmt->bits[1]);
1748         hwc_debug("  --> %x:%x (changed = %d)\n", fmt->bits[0], fmt->bits[1], changed);
1749         return changed;
1750 }
1751
1752 #define MAX_MASK        64
1753
1754 /*
1755  * check whether the registered audio formats need special hw-constraints
1756  */
1757 static int check_hw_params_convention(struct snd_usb_substream *subs)
1758 {
1759         int i;
1760         u32 *channels;
1761         u32 *rates;
1762         u32 cmaster, rmaster;
1763         u32 rate_min = 0, rate_max = 0;
1764         struct list_head *p;
1765         int err = 1;
1766
1767         channels = kcalloc(MAX_MASK, sizeof(u32), GFP_KERNEL);
1768         rates = kcalloc(MAX_MASK, sizeof(u32), GFP_KERNEL);
1769         if (!channels || !rates) {
1770                 err = -ENOMEM;
1771                 goto __out;
1772         }
1773
1774         list_for_each(p, &subs->fmt_list) {
1775                 struct audioformat *f;
1776                 f = list_entry(p, struct audioformat, list);
1777                 /* unconventional channels? */
1778                 if (f->channels > 32)
1779                         goto __out;
1780                 /* continuous rate min/max matches? */
1781                 if (f->rates & SNDRV_PCM_RATE_CONTINUOUS) {
1782                         if (rate_min && f->rate_min != rate_min)
1783                                 goto __out;
1784                         if (rate_max && f->rate_max != rate_max)
1785                                 goto __out;
1786                         rate_min = f->rate_min;
1787                         rate_max = f->rate_max;
1788                 }
1789                 /* combination of continuous rates and fixed rates? */
1790                 if (rates[f->format] & SNDRV_PCM_RATE_CONTINUOUS) {
1791                         if (f->rates != rates[f->format])
1792                                 goto __out;
1793                 }
1794                 if (f->rates & SNDRV_PCM_RATE_CONTINUOUS) {
1795                         if (rates[f->format] && rates[f->format] != f->rates)
1796                                 goto __out;
1797                 }
1798                 channels[f->format] |= (1 << f->channels);
1799                 rates[f->format] |= f->rates;
1800                 /* needs knot? */
1801                 if (f->rates & SNDRV_PCM_RATE_KNOT)
1802                         goto __out;
1803         }
1804         /* check whether channels and rates match for all formats */
1805         cmaster = rmaster = 0;
1806         for (i = 0; i < MAX_MASK; i++) {
1807                 if (cmaster != channels[i] && cmaster && channels[i])
1808                         goto __out;
1809                 if (rmaster != rates[i] && rmaster && rates[i])
1810                         goto __out;
1811                 if (channels[i])
1812                         cmaster = channels[i];
1813                 if (rates[i])
1814                         rmaster = rates[i];
1815         }
1816         /* check whether channels match for all distinct rates */
1817         memset(channels, 0, MAX_MASK * sizeof(u32));
1818         list_for_each(p, &subs->fmt_list) {
1819                 struct audioformat *f;
1820                 f = list_entry(p, struct audioformat, list);
1821                 if (f->rates & SNDRV_PCM_RATE_CONTINUOUS)
1822                         continue;
1823                 for (i = 0; i < 32; i++) {
1824                         if (f->rates & (1 << i))
1825                                 channels[i] |= (1 << f->channels);
1826                 }
1827         }
1828         cmaster = 0;
1829         for (i = 0; i < 32; i++) {
1830                 if (cmaster != channels[i] && cmaster && channels[i])
1831                         goto __out;
1832                 if (channels[i])
1833                         cmaster = channels[i];
1834         }
1835         err = 0;
1836
1837  __out:
1838         kfree(channels);
1839         kfree(rates);
1840         return err;
1841 }
1842
1843 /*
1844  *  If the device supports unusual bit rates, does the request meet these?
1845  */
1846 static int snd_usb_pcm_check_knot(struct snd_pcm_runtime *runtime,
1847                                   struct snd_usb_substream *subs)
1848 {
1849         struct audioformat *fp;
1850         int count = 0, needs_knot = 0;
1851         int err;
1852
1853         list_for_each_entry(fp, &subs->fmt_list, list) {
1854                 if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS)
1855                         return 0;
1856                 count += fp->nr_rates;
1857                 if (fp->rates & SNDRV_PCM_RATE_KNOT)
1858                         needs_knot = 1;
1859         }
1860         if (!needs_knot)
1861                 return 0;
1862
1863         subs->rate_list.count = count;
1864         subs->rate_list.list = kmalloc(sizeof(int) * count, GFP_KERNEL);
1865         subs->rate_list.mask = 0;
1866         count = 0;
1867         list_for_each_entry(fp, &subs->fmt_list, list) {
1868                 int i;
1869                 for (i = 0; i < fp->nr_rates; i++)
1870                         subs->rate_list.list[count++] = fp->rate_table[i];
1871         }
1872         err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1873                                          &subs->rate_list);
1874         if (err < 0)
1875                 return err;
1876
1877         return 0;
1878 }
1879
1880
1881 /*
1882  * set up the runtime hardware information.
1883  */
1884
1885 static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substream *subs)
1886 {
1887         struct list_head *p;
1888         int err;
1889
1890         runtime->hw.formats = subs->formats;
1891
1892         runtime->hw.rate_min = 0x7fffffff;
1893         runtime->hw.rate_max = 0;
1894         runtime->hw.channels_min = 256;
1895         runtime->hw.channels_max = 0;
1896         runtime->hw.rates = 0;
1897         /* check min/max rates and channels */
1898         list_for_each(p, &subs->fmt_list) {
1899                 struct audioformat *fp;
1900                 fp = list_entry(p, struct audioformat, list);
1901                 runtime->hw.rates |= fp->rates;
1902                 if (runtime->hw.rate_min > fp->rate_min)
1903                         runtime->hw.rate_min = fp->rate_min;
1904                 if (runtime->hw.rate_max < fp->rate_max)
1905                         runtime->hw.rate_max = fp->rate_max;
1906                 if (runtime->hw.channels_min > fp->channels)
1907                         runtime->hw.channels_min = fp->channels;
1908                 if (runtime->hw.channels_max < fp->channels)
1909                         runtime->hw.channels_max = fp->channels;
1910                 if (fp->fmt_type == USB_FORMAT_TYPE_II && fp->frame_size > 0) {
1911                         /* FIXME: there might be more than one audio formats... */
1912                         runtime->hw.period_bytes_min = runtime->hw.period_bytes_max =
1913                                 fp->frame_size;
1914                 }
1915         }
1916
1917         /* set the period time minimum 1ms */
1918         /* FIXME: high-speed mode allows 125us minimum period, but many parts
1919          * in the current code assume the 1ms period.
1920          */
1921         snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1922                                      1000 * MIN_PACKS_URB,
1923                                      /*(nrpacks * MAX_URBS) * 1000*/ UINT_MAX);
1924
1925         err = check_hw_params_convention(subs);
1926         if (err < 0)
1927                 return err;
1928         else if (err) {
1929                 hwc_debug("setting extra hw constraints...\n");
1930                 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1931                                                hw_rule_rate, subs,
1932                                                SNDRV_PCM_HW_PARAM_FORMAT,
1933                                                SNDRV_PCM_HW_PARAM_CHANNELS,
1934                                                -1)) < 0)
1935                         return err;
1936                 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1937                                                hw_rule_channels, subs,
1938                                                SNDRV_PCM_HW_PARAM_FORMAT,
1939                                                SNDRV_PCM_HW_PARAM_RATE,
1940                                                -1)) < 0)
1941                         return err;
1942                 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1943                                                hw_rule_format, subs,
1944                                                SNDRV_PCM_HW_PARAM_RATE,
1945                                                SNDRV_PCM_HW_PARAM_CHANNELS,
1946                                                -1)) < 0)
1947                         return err;
1948                 if ((err = snd_usb_pcm_check_knot(runtime, subs)) < 0)
1949                         return err;
1950         }
1951         return 0;
1952 }
1953
1954 static int snd_usb_pcm_open(struct snd_pcm_substream *substream, int direction)
1955 {
1956         struct snd_usb_stream *as = snd_pcm_substream_chip(substream);
1957         struct snd_pcm_runtime *runtime = substream->runtime;
1958         struct snd_usb_substream *subs = &as->substream[direction];
1959
1960         subs->interface = -1;
1961         subs->format = 0;
1962         runtime->hw = snd_usb_hardware;
1963         runtime->private_data = subs;
1964         subs->pcm_substream = substream;
1965         return setup_hw_info(runtime, subs);
1966 }
1967
1968 static int snd_usb_pcm_close(struct snd_pcm_substream *substream, int direction)
1969 {
1970         struct snd_usb_stream *as = snd_pcm_substream_chip(substream);
1971         struct snd_usb_substream *subs = &as->substream[direction];
1972
1973         if (subs->interface >= 0) {
1974                 usb_set_interface(subs->dev, subs->interface, 0);
1975                 subs->interface = -1;
1976         }
1977         subs->pcm_substream = NULL;
1978         return 0;
1979 }
1980
1981 static int snd_usb_playback_open(struct snd_pcm_substream *substream)
1982 {
1983         return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_PLAYBACK);
1984 }
1985
1986 static int snd_usb_playback_close(struct snd_pcm_substream *substream)
1987 {
1988         return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_PLAYBACK);
1989 }
1990
1991 static int snd_usb_capture_open(struct snd_pcm_substream *substream)
1992 {
1993         return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_CAPTURE);
1994 }
1995
1996 static int snd_usb_capture_close(struct snd_pcm_substream *substream)
1997 {
1998         return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_CAPTURE);
1999 }
2000
2001 static struct snd_pcm_ops snd_usb_playback_ops = {
2002         .open =         snd_usb_playback_open,
2003         .close =        snd_usb_playback_close,
2004         .ioctl =        snd_pcm_lib_ioctl,
2005         .hw_params =    snd_usb_hw_params,
2006         .hw_free =      snd_usb_hw_free,
2007         .prepare =      snd_usb_pcm_prepare,
2008         .trigger =      snd_usb_pcm_playback_trigger,
2009         .pointer =      snd_usb_pcm_pointer,
2010         .page =         snd_pcm_get_vmalloc_page,
2011 };
2012
2013 static struct snd_pcm_ops snd_usb_capture_ops = {
2014         .open =         snd_usb_capture_open,
2015         .close =        snd_usb_capture_close,
2016         .ioctl =        snd_pcm_lib_ioctl,
2017         .hw_params =    snd_usb_hw_params,
2018         .hw_free =      snd_usb_hw_free,
2019         .prepare =      snd_usb_pcm_prepare,
2020         .trigger =      snd_usb_pcm_capture_trigger,
2021         .pointer =      snd_usb_pcm_pointer,
2022         .page =         snd_pcm_get_vmalloc_page,
2023 };
2024
2025
2026
2027 /*
2028  * helper functions
2029  */
2030
2031 /*
2032  * combine bytes and get an integer value
2033  */
2034 unsigned int snd_usb_combine_bytes(unsigned char *bytes, int size)
2035 {
2036         switch (size) {
2037         case 1:  return *bytes;
2038         case 2:  return combine_word(bytes);
2039         case 3:  return combine_triple(bytes);
2040         case 4:  return combine_quad(bytes);
2041         default: return 0;
2042         }
2043 }
2044
2045 /*
2046  * parse descriptor buffer and return the pointer starting the given
2047  * descriptor type.
2048  */
2049 void *snd_usb_find_desc(void *descstart, int desclen, void *after, u8 dtype)
2050 {
2051         u8 *p, *end, *next;
2052
2053         p = descstart;
2054         end = p + desclen;
2055         for (; p < end;) {
2056                 if (p[0] < 2)
2057                         return NULL;
2058                 next = p + p[0];
2059                 if (next > end)
2060                         return NULL;
2061                 if (p[1] == dtype && (!after || (void *)p > after)) {
2062                         return p;
2063                 }
2064                 p = next;
2065         }
2066         return NULL;
2067 }
2068
2069 /*
2070  * find a class-specified interface descriptor with the given subtype.
2071  */
2072 void *snd_usb_find_csint_desc(void *buffer, int buflen, void *after, u8 dsubtype)
2073 {
2074         unsigned char *p = after;
2075
2076         while ((p = snd_usb_find_desc(buffer, buflen, p,
2077                                       USB_DT_CS_INTERFACE)) != NULL) {
2078                 if (p[0] >= 3 && p[2] == dsubtype)
2079                         return p;
2080         }
2081         return NULL;
2082 }
2083
2084 /*
2085  * Wrapper for usb_control_msg().
2086  * Allocates a temp buffer to prevent dmaing from/to the stack.
2087  */
2088 int snd_usb_ctl_msg(struct usb_device *dev, unsigned int pipe, __u8 request,
2089                     __u8 requesttype, __u16 value, __u16 index, void *data,
2090                     __u16 size, int timeout)
2091 {
2092         int err;
2093         void *buf = NULL;
2094
2095         if (size > 0) {
2096                 buf = kmemdup(data, size, GFP_KERNEL);
2097                 if (!buf)
2098                         return -ENOMEM;
2099         }
2100         err = usb_control_msg(dev, pipe, request, requesttype,
2101                               value, index, buf, size, timeout);
2102         if (size > 0) {
2103                 memcpy(data, buf, size);
2104                 kfree(buf);
2105         }
2106         return err;
2107 }
2108
2109
2110 /*
2111  * entry point for linux usb interface
2112  */
2113
2114 static int usb_audio_probe(struct usb_interface *intf,
2115                            const struct usb_device_id *id);
2116 static void usb_audio_disconnect(struct usb_interface *intf);
2117
2118 #ifdef CONFIG_PM
2119 static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message);
2120 static int usb_audio_resume(struct usb_interface *intf);
2121 #else
2122 #define usb_audio_suspend NULL
2123 #define usb_audio_resume NULL
2124 #endif
2125
2126 static struct usb_device_id usb_audio_ids [] = {
2127 #include "usbquirks.h"
2128     { .match_flags = (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS),
2129       .bInterfaceClass = USB_CLASS_AUDIO,
2130       .bInterfaceSubClass = USB_SUBCLASS_AUDIO_CONTROL },
2131     { }                                         /* Terminating entry */
2132 };
2133
2134 MODULE_DEVICE_TABLE (usb, usb_audio_ids);
2135
2136 static struct usb_driver usb_audio_driver = {
2137         .name =         "snd-usb-audio",
2138         .probe =        usb_audio_probe,
2139         .disconnect =   usb_audio_disconnect,
2140         .suspend =      usb_audio_suspend,
2141         .resume =       usb_audio_resume,
2142         .id_table =     usb_audio_ids,
2143 };
2144
2145
2146 #if defined(CONFIG_PROC_FS) && defined(CONFIG_SND_VERBOSE_PROCFS)
2147
2148 /*
2149  * proc interface for list the supported pcm formats
2150  */
2151 static void proc_dump_substream_formats(struct snd_usb_substream *subs, struct snd_info_buffer *buffer)
2152 {
2153         struct list_head *p;
2154         static char *sync_types[4] = {
2155                 "NONE", "ASYNC", "ADAPTIVE", "SYNC"
2156         };
2157
2158         list_for_each(p, &subs->fmt_list) {
2159                 struct audioformat *fp;
2160                 fp = list_entry(p, struct audioformat, list);
2161                 snd_iprintf(buffer, "  Interface %d\n", fp->iface);
2162                 snd_iprintf(buffer, "    Altset %d\n", fp->altsetting);
2163                 snd_iprintf(buffer, "    Format: 0x%x\n", fp->format);
2164                 snd_iprintf(buffer, "    Channels: %d\n", fp->channels);
2165                 snd_iprintf(buffer, "    Endpoint: %d %s (%s)\n",
2166                             fp->endpoint & USB_ENDPOINT_NUMBER_MASK,
2167                             fp->endpoint & USB_DIR_IN ? "IN" : "OUT",
2168                             sync_types[(fp->ep_attr & EP_ATTR_MASK) >> 2]);
2169                 if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS) {
2170                         snd_iprintf(buffer, "    Rates: %d - %d (continuous)\n",
2171                                     fp->rate_min, fp->rate_max);
2172                 } else {
2173                         unsigned int i;
2174                         snd_iprintf(buffer, "    Rates: ");
2175                         for (i = 0; i < fp->nr_rates; i++) {
2176                                 if (i > 0)
2177                                         snd_iprintf(buffer, ", ");
2178                                 snd_iprintf(buffer, "%d", fp->rate_table[i]);
2179                         }
2180                         snd_iprintf(buffer, "\n");
2181                 }
2182                 // snd_iprintf(buffer, "    Max Packet Size = %d\n", fp->maxpacksize);
2183                 // snd_iprintf(buffer, "    EP Attribute = 0x%x\n", fp->attributes);
2184         }
2185 }
2186
2187 static void proc_dump_substream_status(struct snd_usb_substream *subs, struct snd_info_buffer *buffer)
2188 {
2189         if (subs->running) {
2190                 unsigned int i;
2191                 snd_iprintf(buffer, "  Status: Running\n");
2192                 snd_iprintf(buffer, "    Interface = %d\n", subs->interface);
2193                 snd_iprintf(buffer, "    Altset = %d\n", subs->format);
2194                 snd_iprintf(buffer, "    URBs = %d [ ", subs->nurbs);
2195                 for (i = 0; i < subs->nurbs; i++)
2196                         snd_iprintf(buffer, "%d ", subs->dataurb[i].packets);
2197                 snd_iprintf(buffer, "]\n");
2198                 snd_iprintf(buffer, "    Packet Size = %d\n", subs->curpacksize);
2199                 snd_iprintf(buffer, "    Momentary freq = %u Hz (%#x.%04x)\n",
2200                             snd_usb_get_speed(subs->dev) == USB_SPEED_FULL
2201                             ? get_full_speed_hz(subs->freqm)
2202                             : get_high_speed_hz(subs->freqm),
2203                             subs->freqm >> 16, subs->freqm & 0xffff);
2204         } else {
2205                 snd_iprintf(buffer, "  Status: Stop\n");
2206         }
2207 }
2208
2209 static void proc_pcm_format_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
2210 {
2211         struct snd_usb_stream *stream = entry->private_data;
2212
2213         snd_iprintf(buffer, "%s : %s\n", stream->chip->card->longname, stream->pcm->name);
2214
2215         if (stream->substream[SNDRV_PCM_STREAM_PLAYBACK].num_formats) {
2216                 snd_iprintf(buffer, "\nPlayback:\n");
2217                 proc_dump_substream_status(&stream->substream[SNDRV_PCM_STREAM_PLAYBACK], buffer);
2218                 proc_dump_substream_formats(&stream->substream[SNDRV_PCM_STREAM_PLAYBACK], buffer);
2219         }
2220         if (stream->substream[SNDRV_PCM_STREAM_CAPTURE].num_formats) {
2221                 snd_iprintf(buffer, "\nCapture:\n");
2222                 proc_dump_substream_status(&stream->substream[SNDRV_PCM_STREAM_CAPTURE], buffer);
2223                 proc_dump_substream_formats(&stream->substream[SNDRV_PCM_STREAM_CAPTURE], buffer);
2224         }
2225 }
2226
2227 static void proc_pcm_format_add(struct snd_usb_stream *stream)
2228 {
2229         struct snd_info_entry *entry;
2230         char name[32];
2231         struct snd_card *card = stream->chip->card;
2232
2233         sprintf(name, "stream%d", stream->pcm_index);
2234         if (!snd_card_proc_new(card, name, &entry))
2235                 snd_info_set_text_ops(entry, stream, proc_pcm_format_read);
2236 }
2237
2238 #else
2239
2240 static inline void proc_pcm_format_add(struct snd_usb_stream *stream)
2241 {
2242 }
2243
2244 #endif
2245
2246 /*
2247  * initialize the substream instance.
2248  */
2249
2250 static void init_substream(struct snd_usb_stream *as, int stream, struct audioformat *fp)
2251 {
2252         struct snd_usb_substream *subs = &as->substream[stream];
2253
2254         INIT_LIST_HEAD(&subs->fmt_list);
2255         spin_lock_init(&subs->lock);
2256
2257         subs->stream = as;
2258         subs->direction = stream;
2259         subs->dev = as->chip->dev;
2260         if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL) {
2261                 subs->ops = audio_urb_ops[stream];
2262         } else {
2263                 subs->ops = audio_urb_ops_high_speed[stream];
2264                 switch (as->chip->usb_id) {
2265                 case USB_ID(0x041e, 0x3f02): /* E-Mu 0202 USB */
2266                 case USB_ID(0x041e, 0x3f04): /* E-Mu 0404 USB */
2267                         subs->ops.retire_sync = retire_playback_sync_urb_hs_emu;
2268                         break;
2269                 }
2270         }
2271         snd_pcm_set_ops(as->pcm, stream,
2272                         stream == SNDRV_PCM_STREAM_PLAYBACK ?
2273                         &snd_usb_playback_ops : &snd_usb_capture_ops);
2274
2275         list_add_tail(&fp->list, &subs->fmt_list);
2276         subs->formats |= 1ULL << fp->format;
2277         subs->endpoint = fp->endpoint;
2278         subs->num_formats++;
2279         subs->fmt_type = fp->fmt_type;
2280 }
2281
2282
2283 /*
2284  * free a substream
2285  */
2286 static void free_substream(struct snd_usb_substream *subs)
2287 {
2288         struct list_head *p, *n;
2289
2290         if (!subs->num_formats)
2291                 return; /* not initialized */
2292         list_for_each_safe(p, n, &subs->fmt_list) {
2293                 struct audioformat *fp = list_entry(p, struct audioformat, list);
2294                 kfree(fp->rate_table);
2295                 kfree(fp);
2296         }
2297         kfree(subs->rate_list.list);
2298 }
2299
2300
2301 /*
2302  * free a usb stream instance
2303  */
2304 static void snd_usb_audio_stream_free(struct snd_usb_stream *stream)
2305 {
2306         free_substream(&stream->substream[0]);
2307         free_substream(&stream->substream[1]);
2308         list_del(&stream->list);
2309         kfree(stream);
2310 }
2311
2312 static void snd_usb_audio_pcm_free(struct snd_pcm *pcm)
2313 {
2314         struct snd_usb_stream *stream = pcm->private_data;
2315         if (stream) {
2316                 stream->pcm = NULL;
2317                 snd_usb_audio_stream_free(stream);
2318         }
2319 }
2320
2321
2322 /*
2323  * add this endpoint to the chip instance.
2324  * if a stream with the same endpoint already exists, append to it.
2325  * if not, create a new pcm stream.
2326  */
2327 static int add_audio_endpoint(struct snd_usb_audio *chip, int stream, struct audioformat *fp)
2328 {
2329         struct list_head *p;
2330         struct snd_usb_stream *as;
2331         struct snd_usb_substream *subs;
2332         struct snd_pcm *pcm;
2333         int err;
2334
2335         list_for_each(p, &chip->pcm_list) {
2336                 as = list_entry(p, struct snd_usb_stream, list);
2337                 if (as->fmt_type != fp->fmt_type)
2338                         continue;
2339                 subs = &as->substream[stream];
2340                 if (!subs->endpoint)
2341                         continue;
2342                 if (subs->endpoint == fp->endpoint) {
2343                         list_add_tail(&fp->list, &subs->fmt_list);
2344                         subs->num_formats++;
2345                         subs->formats |= 1ULL << fp->format;
2346                         return 0;
2347                 }
2348         }
2349         /* look for an empty stream */
2350         list_for_each(p, &chip->pcm_list) {
2351                 as = list_entry(p, struct snd_usb_stream, list);
2352                 if (as->fmt_type != fp->fmt_type)
2353                         continue;
2354                 subs = &as->substream[stream];
2355                 if (subs->endpoint)
2356                         continue;
2357                 err = snd_pcm_new_stream(as->pcm, stream, 1);
2358                 if (err < 0)
2359                         return err;
2360                 init_substream(as, stream, fp);
2361                 return 0;
2362         }
2363
2364         /* create a new pcm */
2365         as = kzalloc(sizeof(*as), GFP_KERNEL);
2366         if (!as)
2367                 return -ENOMEM;
2368         as->pcm_index = chip->pcm_devs;
2369         as->chip = chip;
2370         as->fmt_type = fp->fmt_type;
2371         err = snd_pcm_new(chip->card, "USB Audio", chip->pcm_devs,
2372                           stream == SNDRV_PCM_STREAM_PLAYBACK ? 1 : 0,
2373                           stream == SNDRV_PCM_STREAM_PLAYBACK ? 0 : 1,
2374                           &pcm);
2375         if (err < 0) {
2376                 kfree(as);
2377                 return err;
2378         }
2379         as->pcm = pcm;
2380         pcm->private_data = as;
2381         pcm->private_free = snd_usb_audio_pcm_free;
2382         pcm->info_flags = 0;
2383         if (chip->pcm_devs > 0)
2384                 sprintf(pcm->name, "USB Audio #%d", chip->pcm_devs);
2385         else
2386                 strcpy(pcm->name, "USB Audio");
2387
2388         init_substream(as, stream, fp);
2389
2390         list_add(&as->list, &chip->pcm_list);
2391         chip->pcm_devs++;
2392
2393         proc_pcm_format_add(as);
2394
2395         return 0;
2396 }
2397
2398
2399 /*
2400  * check if the device uses big-endian samples
2401  */
2402 static int is_big_endian_format(struct snd_usb_audio *chip, struct audioformat *fp)
2403 {
2404         switch (chip->usb_id) {
2405         case USB_ID(0x0763, 0x2001): /* M-Audio Quattro: captured data only */
2406                 if (fp->endpoint & USB_DIR_IN)
2407                         return 1;
2408                 break;
2409         case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
2410                 if (device_setup[chip->index] == 0x00 ||
2411                     fp->altsetting==1 || fp->altsetting==2 || fp->altsetting==3)
2412                         return 1;
2413         }
2414         return 0;
2415 }
2416
2417 /*
2418  * parse the audio format type I descriptor
2419  * and returns the corresponding pcm format
2420  *
2421  * @dev: usb device
2422  * @fp: audioformat record
2423  * @format: the format tag (wFormatTag)
2424  * @fmt: the format type descriptor
2425  */
2426 static int parse_audio_format_i_type(struct snd_usb_audio *chip, struct audioformat *fp,
2427                                      int format, unsigned char *fmt)
2428 {
2429         int pcm_format;
2430         int sample_width, sample_bytes;
2431
2432         /* FIXME: correct endianess and sign? */
2433         pcm_format = -1;
2434         sample_width = fmt[6];
2435         sample_bytes = fmt[5];
2436         switch (format) {
2437         case 0: /* some devices don't define this correctly... */
2438                 snd_printdd(KERN_INFO "%d:%u:%d : format type 0 is detected, processed as PCM\n",
2439                             chip->dev->devnum, fp->iface, fp->altsetting);
2440                 /* fall-through */
2441         case USB_AUDIO_FORMAT_PCM:
2442                 if (sample_width > sample_bytes * 8) {
2443                         snd_printk(KERN_INFO "%d:%u:%d : sample bitwidth %d in over sample bytes %d\n",
2444                                    chip->dev->devnum, fp->iface, fp->altsetting,
2445                                    sample_width, sample_bytes);
2446                 }
2447                 /* check the format byte size */
2448                 switch (fmt[5]) {
2449                 case 1:
2450                         pcm_format = SNDRV_PCM_FORMAT_S8;
2451                         break;
2452                 case 2:
2453                         if (is_big_endian_format(chip, fp))
2454                                 pcm_format = SNDRV_PCM_FORMAT_S16_BE; /* grrr, big endian!! */
2455                         else
2456                                 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
2457                         break;
2458                 case 3:
2459                         if (is_big_endian_format(chip, fp))
2460                                 pcm_format = SNDRV_PCM_FORMAT_S24_3BE; /* grrr, big endian!! */
2461                         else
2462                                 pcm_format = SNDRV_PCM_FORMAT_S24_3LE;
2463                         break;
2464                 case 4:
2465                         pcm_format = SNDRV_PCM_FORMAT_S32_LE;
2466                         break;
2467                 default:
2468                         snd_printk(KERN_INFO "%d:%u:%d : unsupported sample bitwidth %d in %d bytes\n",
2469                                    chip->dev->devnum, fp->iface,
2470                                    fp->altsetting, sample_width, sample_bytes);
2471                         break;
2472                 }
2473                 break;
2474         case USB_AUDIO_FORMAT_PCM8:
2475                 pcm_format = SNDRV_PCM_FORMAT_U8;
2476
2477                 /* Dallas DS4201 workaround: it advertises U8 format, but really
2478                    supports S8. */
2479                 if (chip->usb_id == USB_ID(0x04fa, 0x4201))
2480                         pcm_format = SNDRV_PCM_FORMAT_S8;
2481                 break;
2482         case USB_AUDIO_FORMAT_IEEE_FLOAT:
2483                 pcm_format = SNDRV_PCM_FORMAT_FLOAT_LE;
2484                 break;
2485         case USB_AUDIO_FORMAT_ALAW:
2486                 pcm_format = SNDRV_PCM_FORMAT_A_LAW;
2487                 break;
2488         case USB_AUDIO_FORMAT_MU_LAW:
2489                 pcm_format = SNDRV_PCM_FORMAT_MU_LAW;
2490                 break;
2491         default:
2492                 snd_printk(KERN_INFO "%d:%u:%d : unsupported format type %d\n",
2493                            chip->dev->devnum, fp->iface, fp->altsetting, format);
2494                 break;
2495         }
2496         return pcm_format;
2497 }
2498
2499
2500 /*
2501  * parse the format descriptor and stores the possible sample rates
2502  * on the audioformat table.
2503  *
2504  * @dev: usb device
2505  * @fp: audioformat record
2506  * @fmt: the format descriptor
2507  * @offset: the start offset of descriptor pointing the rate type
2508  *          (7 for type I and II, 8 for type II)
2509  */
2510 static int parse_audio_format_rates(struct snd_usb_audio *chip, struct audioformat *fp,
2511                                     unsigned char *fmt, int offset)
2512 {
2513         int nr_rates = fmt[offset];
2514
2515         if (fmt[0] < offset + 1 + 3 * (nr_rates ? nr_rates : 2)) {
2516                 snd_printk(KERN_ERR "%d:%u:%d : invalid FORMAT_TYPE desc\n",
2517                                    chip->dev->devnum, fp->iface, fp->altsetting);
2518                 return -1;
2519         }
2520
2521         if (nr_rates) {
2522                 /*
2523                  * build the rate table and bitmap flags
2524                  */
2525                 int r, idx;
2526                 unsigned int nonzero_rates = 0;
2527
2528                 fp->rate_table = kmalloc(sizeof(int) * nr_rates, GFP_KERNEL);
2529                 if (fp->rate_table == NULL) {
2530                         snd_printk(KERN_ERR "cannot malloc\n");
2531                         return -1;
2532                 }
2533
2534                 fp->nr_rates = nr_rates;
2535                 fp->rate_min = fp->rate_max = combine_triple(&fmt[8]);
2536                 for (r = 0, idx = offset + 1; r < nr_rates; r++, idx += 3) {
2537                         unsigned int rate = combine_triple(&fmt[idx]);
2538                         /* C-Media CM6501 mislabels its 96 kHz altsetting */
2539                         if (rate == 48000 && nr_rates == 1 &&
2540                             chip->usb_id == USB_ID(0x0d8c, 0x0201) &&
2541                             fp->altsetting == 5 && fp->maxpacksize == 392)
2542                                 rate = 96000;
2543                         fp->rate_table[r] = rate;
2544                         nonzero_rates |= rate;
2545                         if (rate < fp->rate_min)
2546                                 fp->rate_min = rate;
2547                         else if (rate > fp->rate_max)
2548                                 fp->rate_max = rate;
2549                         fp->rates |= snd_pcm_rate_to_rate_bit(rate);
2550                 }
2551                 if (!nonzero_rates) {
2552                         hwc_debug("All rates were zero. Skipping format!\n");
2553                         return -1;
2554                 }
2555         } else {
2556                 /* continuous rates */
2557                 fp->rates = SNDRV_PCM_RATE_CONTINUOUS;
2558                 fp->rate_min = combine_triple(&fmt[offset + 1]);
2559                 fp->rate_max = combine_triple(&fmt[offset + 4]);
2560         }
2561         return 0;
2562 }
2563
2564 /*
2565  * parse the format type I and III descriptors
2566  */
2567 static int parse_audio_format_i(struct snd_usb_audio *chip, struct audioformat *fp,
2568                                 int format, unsigned char *fmt)
2569 {
2570         int pcm_format;
2571
2572         if (fmt[3] == USB_FORMAT_TYPE_III) {
2573                 /* FIXME: the format type is really IECxxx
2574                  *        but we give normal PCM format to get the existing
2575                  *        apps working...
2576                  */
2577                 switch (chip->usb_id) {
2578
2579                 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
2580                         if (device_setup[chip->index] == 0x00 &&
2581                             fp->altsetting == 6)
2582                                 pcm_format = SNDRV_PCM_FORMAT_S16_BE;
2583                         else
2584                                 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
2585                         break;
2586                 default:
2587                         pcm_format = SNDRV_PCM_FORMAT_S16_LE;
2588                 }
2589         } else {
2590                 pcm_format = parse_audio_format_i_type(chip, fp, format, fmt);
2591                 if (pcm_format < 0)
2592                         return -1;
2593         }
2594         fp->format = pcm_format;
2595         fp->channels = fmt[4];
2596         if (fp->channels < 1) {
2597                 snd_printk(KERN_ERR "%d:%u:%d : invalid channels %d\n",
2598                            chip->dev->devnum, fp->iface, fp->altsetting, fp->channels);
2599                 return -1;
2600         }
2601         return parse_audio_format_rates(chip, fp, fmt, 7);
2602 }
2603
2604 /*
2605  * prase the format type II descriptor
2606  */
2607 static int parse_audio_format_ii(struct snd_usb_audio *chip, struct audioformat *fp,
2608                                  int format, unsigned char *fmt)
2609 {
2610         int brate, framesize;
2611         switch (format) {
2612         case USB_AUDIO_FORMAT_AC3:
2613                 /* FIXME: there is no AC3 format defined yet */
2614                 // fp->format = SNDRV_PCM_FORMAT_AC3;
2615                 fp->format = SNDRV_PCM_FORMAT_U8; /* temporarily hack to receive byte streams */
2616                 break;
2617         case USB_AUDIO_FORMAT_MPEG:
2618                 fp->format = SNDRV_PCM_FORMAT_MPEG;
2619                 break;
2620         default:
2621                 snd_printd(KERN_INFO "%d:%u:%d : unknown format tag 0x%x is detected.  processed as MPEG.\n",
2622                            chip->dev->devnum, fp->iface, fp->altsetting, format);
2623                 fp->format = SNDRV_PCM_FORMAT_MPEG;
2624                 break;
2625         }
2626         fp->channels = 1;
2627         brate = combine_word(&fmt[4]);  /* fmt[4,5] : wMaxBitRate (in kbps) */
2628         framesize = combine_word(&fmt[6]); /* fmt[6,7]: wSamplesPerFrame */
2629         snd_printd(KERN_INFO "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
2630         fp->frame_size = framesize;
2631         return parse_audio_format_rates(chip, fp, fmt, 8); /* fmt[8..] sample rates */
2632 }
2633
2634 static int parse_audio_format(struct snd_usb_audio *chip, struct audioformat *fp,
2635                               int format, unsigned char *fmt, int stream)
2636 {
2637         int err;
2638
2639         switch (fmt[3]) {
2640         case USB_FORMAT_TYPE_I:
2641         case USB_FORMAT_TYPE_III:
2642                 err = parse_audio_format_i(chip, fp, format, fmt);
2643                 break;
2644         case USB_FORMAT_TYPE_II:
2645                 err = parse_audio_format_ii(chip, fp, format, fmt);
2646                 break;
2647         default:
2648                 snd_printd(KERN_INFO "%d:%u:%d : format type %d is not supported yet\n",
2649                            chip->dev->devnum, fp->iface, fp->altsetting, fmt[3]);
2650                 return -1;
2651         }
2652         fp->fmt_type = fmt[3];
2653         if (err < 0)
2654                 return err;
2655 #if 1
2656         /* FIXME: temporary hack for extigy/audigy 2 nx/zs */
2657         /* extigy apparently supports sample rates other than 48k
2658          * but not in ordinary way.  so we enable only 48k atm.
2659          */
2660         if (chip->usb_id == USB_ID(0x041e, 0x3000) ||
2661             chip->usb_id == USB_ID(0x041e, 0x3020) ||
2662             chip->usb_id == USB_ID(0x041e, 0x3061)) {
2663                 if (fmt[3] == USB_FORMAT_TYPE_I &&
2664                     fp->rates != SNDRV_PCM_RATE_48000 &&
2665                     fp->rates != SNDRV_PCM_RATE_96000)
2666                         return -1;
2667         }
2668 #endif
2669         return 0;
2670 }
2671
2672 static int audiophile_skip_setting_quirk(struct snd_usb_audio *chip,
2673                                          int iface, int altno);
2674 static int parse_audio_endpoints(struct snd_usb_audio *chip, int iface_no)
2675 {
2676         struct usb_device *dev;
2677         struct usb_interface *iface;
2678         struct usb_host_interface *alts;
2679         struct usb_interface_descriptor *altsd;
2680         int i, altno, err, stream;
2681         int format;
2682         struct audioformat *fp;
2683         unsigned char *fmt, *csep;
2684         int num;
2685
2686         dev = chip->dev;
2687
2688         /* parse the interface's altsettings */
2689         iface = usb_ifnum_to_if(dev, iface_no);
2690
2691         num = iface->num_altsetting;
2692
2693         /*
2694          * Dallas DS4201 workaround: It presents 5 altsettings, but the last
2695          * one misses syncpipe, and does not produce any sound.
2696          */
2697         if (chip->usb_id == USB_ID(0x04fa, 0x4201))
2698                 num = 4;
2699
2700         for (i = 0; i < num; i++) {
2701                 alts = &iface->altsetting[i];
2702                 altsd = get_iface_desc(alts);
2703                 /* skip invalid one */
2704                 if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
2705                      altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
2706                     (altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIO_STREAMING &&
2707                      altsd->bInterfaceSubClass != USB_SUBCLASS_VENDOR_SPEC) ||
2708                     altsd->bNumEndpoints < 1 ||
2709                     le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize) == 0)
2710                         continue;
2711                 /* must be isochronous */
2712                 if ((get_endpoint(alts, 0)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
2713                     USB_ENDPOINT_XFER_ISOC)
2714                         continue;
2715                 /* check direction */
2716                 stream = (get_endpoint(alts, 0)->bEndpointAddress & USB_DIR_IN) ?
2717                         SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2718                 altno = altsd->bAlternateSetting;
2719
2720                 /* audiophile usb: skip altsets incompatible with device_setup
2721                  */
2722                 if (chip->usb_id == USB_ID(0x0763, 0x2003) &&
2723                     audiophile_skip_setting_quirk(chip, iface_no, altno))
2724                         continue;
2725
2726                 /* get audio formats */
2727                 fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, AS_GENERAL);
2728                 if (!fmt) {
2729                         snd_printk(KERN_ERR "%d:%u:%d : AS_GENERAL descriptor not found\n",
2730                                    dev->devnum, iface_no, altno);
2731                         continue;
2732                 }
2733
2734                 if (fmt[0] < 7) {
2735                         snd_printk(KERN_ERR "%d:%u:%d : invalid AS_GENERAL desc\n",
2736                                    dev->devnum, iface_no, altno);
2737                         continue;
2738                 }
2739
2740                 format = (fmt[6] << 8) | fmt[5]; /* remember the format value */
2741
2742                 /* get format type */
2743                 fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, FORMAT_TYPE);
2744                 if (!fmt) {
2745                         snd_printk(KERN_ERR "%d:%u:%d : no FORMAT_TYPE desc\n",
2746                                    dev->devnum, iface_no, altno);
2747                         continue;
2748                 }
2749                 if (fmt[0] < 8) {
2750                         snd_printk(KERN_ERR "%d:%u:%d : invalid FORMAT_TYPE desc\n",
2751                                    dev->devnum, iface_no, altno);
2752                         continue;
2753                 }
2754
2755                 csep = snd_usb_find_desc(alts->endpoint[0].extra, alts->endpoint[0].extralen, NULL, USB_DT_CS_ENDPOINT);
2756                 /* Creamware Noah has this descriptor after the 2nd endpoint */
2757                 if (!csep && altsd->bNumEndpoints >= 2)
2758                         csep = snd_usb_find_desc(alts->endpoint[1].extra, alts->endpoint[1].extralen, NULL, USB_DT_CS_ENDPOINT);
2759                 if (!csep || csep[0] < 7 || csep[2] != EP_GENERAL) {
2760                         snd_printk(KERN_WARNING "%d:%u:%d : no or invalid"
2761                                    " class specific endpoint descriptor\n",
2762                                    dev->devnum, iface_no, altno);
2763                         csep = NULL;
2764                 }
2765
2766                 fp = kzalloc(sizeof(*fp), GFP_KERNEL);
2767                 if (! fp) {
2768                         snd_printk(KERN_ERR "cannot malloc\n");
2769                         return -ENOMEM;
2770                 }
2771
2772                 fp->iface = iface_no;
2773                 fp->altsetting = altno;
2774                 fp->altset_idx = i;
2775                 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
2776                 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
2777                 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
2778                 if (snd_usb_get_speed(dev) == USB_SPEED_HIGH)
2779                         fp->maxpacksize = (((fp->maxpacksize >> 11) & 3) + 1)
2780                                         * (fp->maxpacksize & 0x7ff);
2781                 fp->attributes = csep ? csep[3] : 0;
2782
2783                 /* some quirks for attributes here */
2784
2785                 switch (chip->usb_id) {
2786                 case USB_ID(0x0a92, 0x0053): /* AudioTrak Optoplay */
2787                         /* Optoplay sets the sample rate attribute although
2788                          * it seems not supporting it in fact.
2789                          */
2790                         fp->attributes &= ~EP_CS_ATTR_SAMPLE_RATE;
2791                         break;
2792                 case USB_ID(0x041e, 0x3020): /* Creative SB Audigy 2 NX */
2793                 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
2794                         /* doesn't set the sample rate attribute, but supports it */
2795                         fp->attributes |= EP_CS_ATTR_SAMPLE_RATE;
2796                         break;
2797                 case USB_ID(0x047f, 0x0ca1): /* plantronics headset */
2798                 case USB_ID(0x077d, 0x07af): /* Griffin iMic (note that there is
2799                                                 an older model 77d:223) */
2800                 /*
2801                  * plantronics headset and Griffin iMic have set adaptive-in
2802                  * although it's really not...
2803                  */
2804                         fp->ep_attr &= ~EP_ATTR_MASK;
2805                         if (stream == SNDRV_PCM_STREAM_PLAYBACK)
2806                                 fp->ep_attr |= EP_ATTR_ADAPTIVE;
2807                         else
2808                                 fp->ep_attr |= EP_ATTR_SYNC;
2809                         break;
2810                 }
2811
2812                 /* ok, let's parse further... */
2813                 if (parse_audio_format(chip, fp, format, fmt, stream) < 0) {
2814                         kfree(fp->rate_table);
2815                         kfree(fp);
2816                         continue;
2817                 }
2818
2819                 snd_printdd(KERN_INFO "%d:%u:%d: add audio endpoint 0x%x\n", dev->devnum, iface_no, altno, fp->endpoint);
2820                 err = add_audio_endpoint(chip, stream, fp);
2821                 if (err < 0) {
2822                         kfree(fp->rate_table);
2823                         kfree(fp);
2824                         return err;
2825                 }
2826                 /* try to set the interface... */
2827                 usb_set_interface(chip->dev, iface_no, altno);
2828                 init_usb_pitch(chip->dev, iface_no, alts, fp);
2829                 init_usb_sample_rate(chip->dev, iface_no, alts, fp, fp->rate_max);
2830         }
2831         return 0;
2832 }
2833
2834
2835 /*
2836  * disconnect streams
2837  * called from snd_usb_audio_disconnect()
2838  */
2839 static void snd_usb_stream_disconnect(struct list_head *head)
2840 {
2841         int idx;
2842         struct snd_usb_stream *as;
2843         struct snd_usb_substream *subs;
2844
2845         as = list_entry(head, struct snd_usb_stream, list);
2846         for (idx = 0; idx < 2; idx++) {
2847                 subs = &as->substream[idx];
2848                 if (!subs->num_formats)
2849                         return;
2850                 release_substream_urbs(subs, 1);
2851                 subs->interface = -1;
2852         }
2853 }
2854
2855 /*
2856  * parse audio control descriptor and create pcm/midi streams
2857  */
2858 static int snd_usb_create_streams(struct snd_usb_audio *chip, int ctrlif)
2859 {
2860         struct usb_device *dev = chip->dev;
2861         struct usb_host_interface *host_iface;
2862         struct usb_interface *iface;
2863         unsigned char *p1;
2864         int i, j;
2865
2866         /* find audiocontrol interface */
2867         host_iface = &usb_ifnum_to_if(dev, ctrlif)->altsetting[0];
2868         if (!(p1 = snd_usb_find_csint_desc(host_iface->extra, host_iface->extralen, NULL, HEADER))) {
2869                 snd_printk(KERN_ERR "cannot find HEADER\n");
2870                 return -EINVAL;
2871         }
2872         if (! p1[7] || p1[0] < 8 + p1[7]) {
2873                 snd_printk(KERN_ERR "invalid HEADER\n");
2874                 return -EINVAL;
2875         }
2876
2877         /*
2878          * parse all USB audio streaming interfaces
2879          */
2880         for (i = 0; i < p1[7]; i++) {
2881                 struct usb_host_interface *alts;
2882                 struct usb_interface_descriptor *altsd;
2883                 j = p1[8 + i];
2884                 iface = usb_ifnum_to_if(dev, j);
2885                 if (!iface) {
2886                         snd_printk(KERN_ERR "%d:%u:%d : does not exist\n",
2887                                    dev->devnum, ctrlif, j);
2888                         continue;
2889                 }
2890                 if (usb_interface_claimed(iface)) {
2891                         snd_printdd(KERN_INFO "%d:%d:%d: skipping, already claimed\n", dev->devnum, ctrlif, j);
2892                         continue;
2893                 }
2894                 alts = &iface->altsetting[0];
2895                 altsd = get_iface_desc(alts);
2896                 if ((altsd->bInterfaceClass == USB_CLASS_AUDIO ||
2897                      altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC) &&
2898                     altsd->bInterfaceSubClass == USB_SUBCLASS_MIDI_STREAMING) {
2899                         if (snd_usb_create_midi_interface(chip, iface, NULL) < 0) {
2900                                 snd_printk(KERN_ERR "%d:%u:%d: cannot create sequencer device\n", dev->devnum, ctrlif, j);
2901                                 continue;
2902                         }
2903                         usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
2904                         continue;
2905                 }
2906                 if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
2907                      altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
2908                     altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIO_STREAMING) {
2909                         snd_printdd(KERN_ERR "%d:%u:%d: skipping non-supported interface %d\n", dev->devnum, ctrlif, j, altsd->bInterfaceClass);
2910                         /* skip non-supported classes */
2911                         continue;
2912                 }
2913                 if (snd_usb_get_speed(dev) == USB_SPEED_LOW) {
2914                         snd_printk(KERN_ERR "low speed audio streaming not supported\n");
2915                         continue;
2916                 }
2917                 if (! parse_audio_endpoints(chip, j)) {
2918                         usb_set_interface(dev, j, 0); /* reset the current interface */
2919                         usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
2920                 }
2921         }
2922
2923         return 0;
2924 }
2925
2926 /*
2927  * create a stream for an endpoint/altsetting without proper descriptors
2928  */
2929 static int create_fixed_stream_quirk(struct snd_usb_audio *chip,
2930                                      struct usb_interface *iface,
2931                                      const struct snd_usb_audio_quirk *quirk)
2932 {
2933         struct audioformat *fp;
2934         struct usb_host_interface *alts;
2935         int stream, err;
2936         unsigned *rate_table = NULL;
2937
2938         fp = kmemdup(quirk->data, sizeof(*fp), GFP_KERNEL);
2939         if (! fp) {
2940                 snd_printk(KERN_ERR "cannot memdup\n");
2941                 return -ENOMEM;
2942         }
2943         if (fp->nr_rates > 0) {
2944                 rate_table = kmalloc(sizeof(int) * fp->nr_rates, GFP_KERNEL);
2945                 if (!rate_table) {
2946                         kfree(fp);
2947                         return -ENOMEM;
2948                 }
2949                 memcpy(rate_table, fp->rate_table, sizeof(int) * fp->nr_rates);
2950                 fp->rate_table = rate_table;
2951         }
2952
2953         stream = (fp->endpoint & USB_DIR_IN)
2954                 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2955         err = add_audio_endpoint(chip, stream, fp);
2956         if (err < 0) {
2957                 kfree(fp);
2958                 kfree(rate_table);
2959                 return err;
2960         }
2961         if (fp->iface != get_iface_desc(&iface->altsetting[0])->bInterfaceNumber ||
2962             fp->altset_idx >= iface->num_altsetting) {
2963                 kfree(fp);
2964                 kfree(rate_table);
2965                 return -EINVAL;
2966         }
2967         alts = &iface->altsetting[fp->altset_idx];
2968         usb_set_interface(chip->dev, fp->iface, 0);
2969         init_usb_pitch(chip->dev, fp->iface, alts, fp);
2970         init_usb_sample_rate(chip->dev, fp->iface, alts, fp, fp->rate_max);
2971         return 0;
2972 }
2973
2974 /*
2975  * create a stream for an interface with proper descriptors
2976  */
2977 static int create_standard_audio_quirk(struct snd_usb_audio *chip,
2978                                        struct usb_interface *iface,
2979                                        const struct snd_usb_audio_quirk *quirk)
2980 {
2981         struct usb_host_interface *alts;
2982         struct usb_interface_descriptor *altsd;
2983         int err;
2984
2985         alts = &iface->altsetting[0];
2986         altsd = get_iface_desc(alts);
2987         err = parse_audio_endpoints(chip, altsd->bInterfaceNumber);
2988         if (err < 0) {
2989                 snd_printk(KERN_ERR "cannot setup if %d: error %d\n",
2990                            altsd->bInterfaceNumber, err);
2991                 return err;
2992         }
2993         /* reset the current interface */
2994         usb_set_interface(chip->dev, altsd->bInterfaceNumber, 0);
2995         return 0;
2996 }
2997
2998 /*
2999  * Create a stream for an Edirol UA-700/UA-25 interface.  The only way
3000  * to detect the sample rate is by looking at wMaxPacketSize.
3001  */
3002 static int create_ua700_ua25_quirk(struct snd_usb_audio *chip,
3003                                    struct usb_interface *iface,
3004                                    const struct snd_usb_audio_quirk *quirk)
3005 {
3006         static const struct audioformat ua_format = {
3007                 .format = SNDRV_PCM_FORMAT_S24_3LE,
3008                 .channels = 2,
3009                 .fmt_type = USB_FORMAT_TYPE_I,
3010                 .altsetting = 1,
3011                 .altset_idx = 1,
3012                 .rates = SNDRV_PCM_RATE_CONTINUOUS,
3013         };
3014         struct usb_host_interface *alts;
3015         struct usb_interface_descriptor *altsd;
3016         struct audioformat *fp;
3017         int stream, err;
3018
3019         /* both PCM and MIDI interfaces have 2 altsettings */
3020         if (iface->num_altsetting != 2)
3021                 return -ENXIO;
3022         alts = &iface->altsetting[1];
3023         altsd = get_iface_desc(alts);
3024
3025         if (altsd->bNumEndpoints == 2) {
3026                 static const struct snd_usb_midi_endpoint_info ua700_ep = {
3027                         .out_cables = 0x0003,
3028                         .in_cables  = 0x0003
3029                 };
3030                 static const struct snd_usb_audio_quirk ua700_quirk = {
3031                         .type = QUIRK_MIDI_FIXED_ENDPOINT,
3032                         .data = &ua700_ep
3033                 };
3034                 static const struct snd_usb_midi_endpoint_info ua25_ep = {
3035                         .out_cables = 0x0001,
3036                         .in_cables  = 0x0001
3037                 };
3038                 static const struct snd_usb_audio_quirk ua25_quirk = {
3039                         .type = QUIRK_MIDI_FIXED_ENDPOINT,
3040                         .data = &ua25_ep
3041                 };
3042                 if (chip->usb_id == USB_ID(0x0582, 0x002b))
3043                         return snd_usb_create_midi_interface(chip, iface,
3044                                                              &ua700_quirk);
3045                 else
3046                         return snd_usb_create_midi_interface(chip, iface,
3047                                                              &ua25_quirk);
3048         }
3049
3050         if (altsd->bNumEndpoints != 1)
3051                 return -ENXIO;
3052
3053         fp = kmalloc(sizeof(*fp), GFP_KERNEL);
3054         if (!fp)
3055                 return -ENOMEM;
3056         memcpy(fp, &ua_format, sizeof(*fp));
3057
3058         fp->iface = altsd->bInterfaceNumber;
3059         fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
3060         fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
3061         fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
3062
3063         switch (fp->maxpacksize) {
3064         case 0x120:
3065                 fp->rate_max = fp->rate_min = 44100;
3066                 break;
3067         case 0x138:
3068         case 0x140:
3069                 fp->rate_max = fp->rate_min = 48000;
3070                 break;
3071         case 0x258:
3072         case 0x260:
3073                 fp->rate_max = fp->rate_min = 96000;
3074                 break;
3075         default:
3076                 snd_printk(KERN_ERR "unknown sample rate\n");
3077                 kfree(fp);
3078                 return -ENXIO;
3079         }
3080
3081         stream = (fp->endpoint & USB_DIR_IN)
3082                 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
3083         err = add_audio_endpoint(chip, stream, fp);
3084         if (err < 0) {
3085                 kfree(fp);
3086                 return err;
3087         }
3088         usb_set_interface(chip->dev, fp->iface, 0);
3089         return 0;
3090 }
3091
3092 /*
3093  * Create a stream for an Edirol UA-1000 interface.
3094  */
3095 static int create_ua1000_quirk(struct snd_usb_audio *chip,
3096                                struct usb_interface *iface,
3097                                const struct snd_usb_audio_quirk *quirk)
3098 {
3099         static const struct audioformat ua1000_format = {
3100                 .format = SNDRV_PCM_FORMAT_S32_LE,
3101                 .fmt_type = USB_FORMAT_TYPE_I,
3102                 .altsetting = 1,
3103                 .altset_idx = 1,
3104                 .attributes = 0,
3105                 .rates = SNDRV_PCM_RATE_CONTINUOUS,
3106         };
3107         struct usb_host_interface *alts;
3108         struct usb_interface_descriptor *altsd;
3109         struct audioformat *fp;
3110         int stream, err;
3111
3112         if (iface->num_altsetting != 2)
3113                 return -ENXIO;
3114         alts = &iface->altsetting[1];
3115         altsd = get_iface_desc(alts);
3116         if (alts->extralen != 11 || alts->extra[1] != USB_DT_CS_INTERFACE ||
3117             altsd->bNumEndpoints != 1)
3118                 return -ENXIO;
3119
3120         fp = kmemdup(&ua1000_format, sizeof(*fp), GFP_KERNEL);
3121         if (!fp)
3122                 return -ENOMEM;
3123
3124         fp->channels = alts->extra[4];
3125         fp->iface = altsd->bInterfaceNumber;
3126         fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
3127         fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
3128         fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
3129         fp->rate_max = fp->rate_min = combine_triple(&alts->extra[8]);
3130
3131         stream = (fp->endpoint & USB_DIR_IN)
3132                 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
3133         err = add_audio_endpoint(chip, stream, fp);
3134         if (err < 0) {
3135                 kfree(fp);
3136                 return err;
3137         }
3138         /* FIXME: playback must be synchronized to capture */
3139         usb_set_interface(chip->dev, fp->iface, 0);
3140         return 0;
3141 }
3142
3143 /*
3144  * Create a stream for an Edirol UA-101 interface.
3145  * Copy, paste and modify from Edirol UA-1000
3146  */
3147 static int create_ua101_quirk(struct snd_usb_audio *chip,
3148                                struct usb_interface *iface,
3149                                const struct snd_usb_audio_quirk *quirk)
3150 {
3151         static const struct audioformat ua101_format = {
3152                 .format = SNDRV_PCM_FORMAT_S32_LE,
3153                 .fmt_type = USB_FORMAT_TYPE_I,
3154                 .altsetting = 1,
3155                 .altset_idx = 1,
3156                 .attributes = 0,
3157                 .rates = SNDRV_PCM_RATE_CONTINUOUS,
3158         };
3159         struct usb_host_interface *alts;
3160         struct usb_interface_descriptor *altsd;
3161         struct audioformat *fp;
3162         int stream, err;
3163
3164         if (iface->num_altsetting != 2)
3165                 return -ENXIO;
3166         alts = &iface->altsetting[1];
3167         altsd = get_iface_desc(alts);
3168         if (alts->extralen != 18 || alts->extra[1] != USB_DT_CS_INTERFACE ||
3169             altsd->bNumEndpoints != 1)
3170                 return -ENXIO;
3171
3172         fp = kmemdup(&ua101_format, sizeof(*fp), GFP_KERNEL);
3173         if (!fp)
3174                 return -ENOMEM;
3175
3176         fp->channels = alts->extra[11];
3177         fp->iface = altsd->bInterfaceNumber;
3178         fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
3179         fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
3180         fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
3181         fp->rate_max = fp->rate_min = combine_triple(&alts->extra[15]);
3182
3183         stream = (fp->endpoint & USB_DIR_IN)
3184                 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
3185         err = add_audio_endpoint(chip, stream, fp);
3186         if (err < 0) {
3187                 kfree(fp);
3188                 return err;
3189         }
3190         /* FIXME: playback must be synchronized to capture */
3191         usb_set_interface(chip->dev, fp->iface, 0);
3192         return 0;
3193 }
3194
3195 static int snd_usb_create_quirk(struct snd_usb_audio *chip,
3196                                 struct usb_interface *iface,
3197                                 const struct snd_usb_audio_quirk *quirk);
3198
3199 /*
3200  * handle the quirks for the contained interfaces
3201  */
3202 static int create_composite_quirk(struct snd_usb_audio *chip,
3203                                   struct usb_interface *iface,
3204                                   const struct snd_usb_audio_quirk *quirk)
3205 {
3206         int probed_ifnum = get_iface_desc(iface->altsetting)->bInterfaceNumber;
3207         int err;
3208
3209         for (quirk = quirk->data; quirk->ifnum >= 0; ++quirk) {
3210                 iface = usb_ifnum_to_if(chip->dev, quirk->ifnum);
3211                 if (!iface)
3212                         continue;
3213                 if (quirk->ifnum != probed_ifnum &&
3214                     usb_interface_claimed(iface))
3215                         continue;
3216                 err = snd_usb_create_quirk(chip, iface, quirk);
3217                 if (err < 0)
3218                         return err;
3219                 if (quirk->ifnum != probed_ifnum)
3220                         usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
3221         }
3222         return 0;
3223 }
3224
3225 static int ignore_interface_quirk(struct snd_usb_audio *chip,
3226                                   struct usb_interface *iface,
3227                                   const struct snd_usb_audio_quirk *quirk)
3228 {
3229         return 0;
3230 }
3231
3232
3233 /*
3234  * boot quirks
3235  */
3236
3237 #define EXTIGY_FIRMWARE_SIZE_OLD 794
3238 #define EXTIGY_FIRMWARE_SIZE_NEW 483
3239
3240 static int snd_usb_extigy_boot_quirk(struct usb_device *dev, struct usb_interface *intf)
3241 {
3242         struct usb_host_config *config = dev->actconfig;
3243         int err;
3244
3245         if (le16_to_cpu(get_cfg_desc(config)->wTotalLength) == EXTIGY_FIRMWARE_SIZE_OLD ||
3246             le16_to_cpu(get_cfg_desc(config)->wTotalLength) == EXTIGY_FIRMWARE_SIZE_NEW) {
3247                 snd_printdd("sending Extigy boot sequence...\n");
3248                 /* Send message to force it to reconnect with full interface. */
3249                 err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev,0),
3250                                       0x10, 0x43, 0x0001, 0x000a, NULL, 0, 1000);
3251                 if (err < 0) snd_printdd("error sending boot message: %d\n", err);
3252                 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0,
3253                                 &dev->descriptor, sizeof(dev->descriptor));
3254                 config = dev->actconfig;
3255                 if (err < 0) snd_printdd("error usb_get_descriptor: %d\n", err);
3256                 err = usb_reset_configuration(dev);
3257                 if (err < 0) snd_printdd("error usb_reset_configuration: %d\n", err);
3258                 snd_printdd("extigy_boot: new boot length = %d\n",
3259                             le16_to_cpu(get_cfg_desc(config)->wTotalLength));
3260                 return -ENODEV; /* quit this anyway */
3261         }
3262         return 0;
3263 }
3264
3265 static int snd_usb_audigy2nx_boot_quirk(struct usb_device *dev)
3266 {
3267         u8 buf = 1;
3268
3269         snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), 0x2a,
3270                         USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_OTHER,
3271                         0, 0, &buf, 1, 1000);
3272         if (buf == 0) {
3273                 snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), 0x29,
3274                                 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
3275                                 1, 2000, NULL, 0, 1000);
3276                 return -ENODEV;
3277         }
3278         return 0;
3279 }
3280
3281 /*
3282  * C-Media CM106/CM106+ have four 16-bit internal registers that are nicely
3283  * documented in the device's data sheet.
3284  */
3285 static int snd_usb_cm106_write_int_reg(struct usb_device *dev, int reg, u16 value)
3286 {
3287         u8 buf[4];
3288         buf[0] = 0x20;
3289         buf[1] = value & 0xff;
3290         buf[2] = (value >> 8) & 0xff;
3291         buf[3] = reg;
3292         return snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), USB_REQ_SET_CONFIGURATION,
3293                                USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_ENDPOINT,
3294                                0, 0, &buf, 4, 1000);
3295 }
3296
3297 static int snd_usb_cm106_boot_quirk(struct usb_device *dev)
3298 {
3299         /*
3300          * Enable line-out driver mode, set headphone source to front
3301          * channels, enable stereo mic.
3302          */
3303         return snd_usb_cm106_write_int_reg(dev, 2, 0x8004);
3304 }
3305
3306
3307 /*
3308  * Setup quirks
3309  */
3310 #define AUDIOPHILE_SET                  0x01 /* if set, parse device_setup */
3311 #define AUDIOPHILE_SET_DTS              0x02 /* if set, enable DTS Digital Output */
3312 #define AUDIOPHILE_SET_96K              0x04 /* 48-96KHz rate if set, 8-48KHz otherwise */
3313 #define AUDIOPHILE_SET_24B              0x08 /* 24bits sample if set, 16bits otherwise */
3314 #define AUDIOPHILE_SET_DI               0x10 /* if set, enable Digital Input */
3315 #define AUDIOPHILE_SET_MASK             0x1F /* bit mask for setup value */
3316 #define AUDIOPHILE_SET_24B_48K_DI       0x19 /* value for 24bits+48KHz+Digital Input */
3317 #define AUDIOPHILE_SET_24B_48K_NOTDI    0x09 /* value for 24bits+48KHz+No Digital Input */
3318 #define AUDIOPHILE_SET_16B_48K_DI       0x11 /* value for 16bits+48KHz+Digital Input */
3319 #define AUDIOPHILE_SET_16B_48K_NOTDI    0x01 /* value for 16bits+48KHz+No Digital Input */
3320
3321 static int audiophile_skip_setting_quirk(struct snd_usb_audio *chip,
3322                                          int iface, int altno)
3323 {
3324         /* Reset ALL ifaces to 0 altsetting.
3325          * Call it for every possible altsetting of every interface.
3326          */
3327         usb_set_interface(chip->dev, iface, 0);
3328
3329         if (device_setup[chip->index] & AUDIOPHILE_SET) {
3330                 if ((device_setup[chip->index] & AUDIOPHILE_SET_DTS)
3331                     && altno != 6)
3332                         return 1; /* skip this altsetting */
3333                 if ((device_setup[chip->index] & AUDIOPHILE_SET_96K)
3334                     && altno != 1)
3335                         return 1; /* skip this altsetting */
3336                 if ((device_setup[chip->index] & AUDIOPHILE_SET_MASK) ==
3337                     AUDIOPHILE_SET_24B_48K_DI && altno != 2)
3338                         return 1; /* skip this altsetting */
3339                 if ((device_setup[chip->index] & AUDIOPHILE_SET_MASK) ==
3340                     AUDIOPHILE_SET_24B_48K_NOTDI && altno != 3)
3341                         return 1; /* skip this altsetting */
3342                 if ((device_setup[chip->index] & AUDIOPHILE_SET_MASK) ==
3343                     AUDIOPHILE_SET_16B_48K_DI && altno != 4)
3344                         return 1; /* skip this altsetting */
3345                 if ((device_setup[chip->index] & AUDIOPHILE_SET_MASK) ==
3346                     AUDIOPHILE_SET_16B_48K_NOTDI && altno != 5)
3347                         return 1; /* skip this altsetting */
3348         }
3349         return 0; /* keep this altsetting */
3350 }
3351
3352 /*
3353  * audio-interface quirks
3354  *
3355  * returns zero if no standard audio/MIDI parsing is needed.
3356  * returns a postive value if standard audio/midi interfaces are parsed
3357  * after this.
3358  * returns a negative value at error.
3359  */
3360 static int snd_usb_create_quirk(struct snd_usb_audio *chip,
3361                                 struct usb_interface *iface,
3362                                 const struct snd_usb_audio_quirk *quirk)
3363 {
3364         typedef int (*quirk_func_t)(struct snd_usb_audio *, struct usb_interface *,
3365                                     const struct snd_usb_audio_quirk *);
3366         static const quirk_func_t quirk_funcs[] = {
3367                 [QUIRK_IGNORE_INTERFACE] = ignore_interface_quirk,
3368                 [QUIRK_COMPOSITE] = create_composite_quirk,
3369                 [QUIRK_MIDI_STANDARD_INTERFACE] = snd_usb_create_midi_interface,
3370                 [QUIRK_MIDI_FIXED_ENDPOINT] = snd_usb_create_midi_interface,
3371                 [QUIRK_MIDI_YAMAHA] = snd_usb_create_midi_interface,
3372                 [QUIRK_MIDI_MIDIMAN] = snd_usb_create_midi_interface,
3373                 [QUIRK_MIDI_NOVATION] = snd_usb_create_midi_interface,
3374                 [QUIRK_MIDI_RAW] = snd_usb_create_midi_interface,
3375                 [QUIRK_MIDI_EMAGIC] = snd_usb_create_midi_interface,
3376                 [QUIRK_MIDI_CME] = snd_usb_create_midi_interface,
3377                 [QUIRK_AUDIO_STANDARD_INTERFACE] = create_standard_audio_quirk,
3378                 [QUIRK_AUDIO_FIXED_ENDPOINT] = create_fixed_stream_quirk,
3379                 [QUIRK_AUDIO_EDIROL_UA700_UA25] = create_ua700_ua25_quirk,
3380                 [QUIRK_AUDIO_EDIROL_UA1000] = create_ua1000_quirk,
3381                 [QUIRK_AUDIO_EDIROL_UA101] = create_ua101_quirk,
3382         };
3383
3384         if (quirk->type < QUIRK_TYPE_COUNT) {
3385                 return quirk_funcs[quirk->type](chip, iface, quirk);
3386         } else {
3387                 snd_printd(KERN_ERR "invalid quirk type %d\n", quirk->type);
3388                 return -ENXIO;
3389         }
3390 }
3391
3392
3393 /*
3394  * common proc files to show the usb device info
3395  */
3396 static void proc_audio_usbbus_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
3397 {
3398         struct snd_usb_audio *chip = entry->private_data;
3399         if (!chip->shutdown)
3400                 snd_iprintf(buffer, "%03d/%03d\n", chip->dev->bus->busnum, chip->dev->devnum);
3401 }
3402
3403 static void proc_audio_usbid_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
3404 {
3405         struct snd_usb_audio *chip = entry->private_data;
3406         if (!chip->shutdown)
3407                 snd_iprintf(buffer, "%04x:%04x\n",
3408                             USB_ID_VENDOR(chip->usb_id),
3409                             USB_ID_PRODUCT(chip->usb_id));
3410 }
3411
3412 static void snd_usb_audio_create_proc(struct snd_usb_audio *chip)
3413 {
3414         struct snd_info_entry *entry;
3415         if (!snd_card_proc_new(chip->card, "usbbus", &entry))
3416                 snd_info_set_text_ops(entry, chip, proc_audio_usbbus_read);
3417         if (!snd_card_proc_new(chip->card, "usbid", &entry))
3418                 snd_info_set_text_ops(entry, chip, proc_audio_usbid_read);
3419 }
3420
3421 /*
3422  * free the chip instance
3423  *
3424  * here we have to do not much, since pcm and controls are already freed
3425  *
3426  */
3427
3428 static int snd_usb_audio_free(struct snd_usb_audio *chip)
3429 {
3430         kfree(chip);
3431         return 0;
3432 }
3433
3434 static int snd_usb_audio_dev_free(struct snd_device *device)
3435 {
3436         struct snd_usb_audio *chip = device->device_data;
3437         return snd_usb_audio_free(chip);
3438 }
3439
3440
3441 /*
3442  * create a chip instance and set its names.
3443  */
3444 static int snd_usb_audio_create(struct usb_device *dev, int idx,
3445                                 const struct snd_usb_audio_quirk *quirk,
3446                                 struct snd_usb_audio **rchip)
3447 {
3448         struct snd_card *card;
3449         struct snd_usb_audio *chip;
3450         int err, len;
3451         char component[14];
3452         static struct snd_device_ops ops = {
3453                 .dev_free =     snd_usb_audio_dev_free,
3454         };
3455
3456         *rchip = NULL;
3457
3458         if (snd_usb_get_speed(dev) != USB_SPEED_LOW &&
3459             snd_usb_get_speed(dev) != USB_SPEED_FULL &&
3460             snd_usb_get_speed(dev) != USB_SPEED_HIGH) {
3461                 snd_printk(KERN_ERR "unknown device speed %d\n", snd_usb_get_speed(dev));
3462                 return -ENXIO;
3463         }
3464
3465         card = snd_card_new(index[idx], id[idx], THIS_MODULE, 0);
3466         if (card == NULL) {
3467                 snd_printk(KERN_ERR "cannot create card instance %d\n", idx);
3468                 return -ENOMEM;
3469         }
3470
3471         chip = kzalloc(sizeof(*chip), GFP_KERNEL);
3472         if (! chip) {
3473                 snd_card_free(card);
3474                 return -ENOMEM;
3475         }
3476
3477         chip->index = idx;
3478         chip->dev = dev;
3479         chip->card = card;
3480         chip->usb_id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
3481                               le16_to_cpu(dev->descriptor.idProduct));
3482         INIT_LIST_HEAD(&chip->pcm_list);
3483         INIT_LIST_HEAD(&chip->midi_list);
3484         INIT_LIST_HEAD(&chip->mixer_list);
3485
3486         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
3487                 snd_usb_audio_free(chip);
3488                 snd_card_free(card);
3489                 return err;
3490         }
3491
3492         strcpy(card->driver, "USB-Audio");
3493         sprintf(component, "USB%04x:%04x",
3494                 USB_ID_VENDOR(chip->usb_id), USB_ID_PRODUCT(chip->usb_id));
3495         snd_component_add(card, component);
3496
3497         /* retrieve the device string as shortname */
3498         if (quirk && quirk->product_name) {
3499                 strlcpy(card->shortname, quirk->product_name, sizeof(card->shortname));
3500         } else {
3501                 if (!dev->descriptor.iProduct ||
3502                     usb_string(dev, dev->descriptor.iProduct,
3503                                card->shortname, sizeof(card->shortname)) <= 0) {
3504                         /* no name available from anywhere, so use ID */
3505                         sprintf(card->shortname, "USB Device %#04x:%#04x",
3506                                 USB_ID_VENDOR(chip->usb_id),
3507                                 USB_ID_PRODUCT(chip->usb_id));
3508                 }
3509         }
3510
3511         /* retrieve the vendor and device strings as longname */
3512         if (quirk && quirk->vendor_name) {
3513                 len = strlcpy(card->longname, quirk->vendor_name, sizeof(card->longname));
3514         } else {
3515                 if (dev->descriptor.iManufacturer)
3516                         len = usb_string(dev, dev->descriptor.iManufacturer,
3517                                          card->longname, sizeof(card->longname));
3518                 else
3519                         len = 0;
3520                 /* we don't really care if there isn't any vendor string */
3521         }
3522         if (len > 0)
3523                 strlcat(card->longname, " ", sizeof(card->longname));
3524
3525         strlcat(card->longname, card->shortname, sizeof(card->longname));
3526
3527         len = strlcat(card->longname, " at ", sizeof(card->longname));
3528
3529         if (len < sizeof(card->longname))
3530                 usb_make_path(dev, card->longname + len, sizeof(card->longname) - len);
3531
3532         strlcat(card->longname,
3533                 snd_usb_get_speed(dev) == USB_SPEED_LOW ? ", low speed" :
3534                 snd_usb_get_speed(dev) == USB_SPEED_FULL ? ", full speed" :
3535                 ", high speed",
3536                 sizeof(card->longname));
3537
3538         snd_usb_audio_create_proc(chip);
3539
3540         *rchip = chip;
3541         return 0;
3542 }
3543
3544
3545 /*
3546  * probe the active usb device
3547  *
3548  * note that this can be called multiple times per a device, when it
3549  * includes multiple audio control interfaces.
3550  *
3551  * thus we check the usb device pointer and creates the card instance
3552  * only at the first time.  the successive calls of this function will
3553  * append the pcm interface to the corresponding card.
3554  */
3555 static void *snd_usb_audio_probe(struct usb_device *dev,
3556                                  struct usb_interface *intf,
3557                                  const struct usb_device_id *usb_id)
3558 {
3559         const struct snd_usb_audio_quirk *quirk = (const struct snd_usb_audio_quirk *)usb_id->driver_info;
3560         int i, err;
3561         struct snd_usb_audio *chip;
3562         struct usb_host_interface *alts;
3563         int ifnum;
3564         u32 id;
3565
3566         alts = &intf->altsetting[0];
3567         ifnum = get_iface_desc(alts)->bInterfaceNumber;
3568         id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
3569                     le16_to_cpu(dev->descriptor.idProduct));
3570
3571         if (quirk && quirk->ifnum >= 0 && ifnum != quirk->ifnum)
3572                 goto __err_val;
3573
3574         /* SB Extigy needs special boot-up sequence */
3575         /* if more models come, this will go to the quirk list. */
3576         if (id == USB_ID(0x041e, 0x3000)) {
3577                 if (snd_usb_extigy_boot_quirk(dev, intf) < 0)
3578                         goto __err_val;
3579         }
3580         /* SB Audigy 2 NX needs its own boot-up magic, too */
3581         if (id == USB_ID(0x041e, 0x3020)) {
3582                 if (snd_usb_audigy2nx_boot_quirk(dev) < 0)
3583                         goto __err_val;
3584         }
3585
3586         /* C-Media CM106 / Turtle Beach Audio Advantage Roadie */
3587         if (id == USB_ID(0x10f5, 0x0200)) {
3588                 if (snd_usb_cm106_boot_quirk(dev) < 0)
3589                         goto __err_val;
3590         }
3591
3592         /*
3593          * found a config.  now register to ALSA
3594          */
3595
3596         /* check whether it's already registered */
3597         chip = NULL;
3598         mutex_lock(&register_mutex);
3599         for (i = 0; i < SNDRV_CARDS; i++) {
3600                 if (usb_chip[i] && usb_chip[i]->dev == dev) {
3601                         if (usb_chip[i]->shutdown) {
3602                                 snd_printk(KERN_ERR "USB device is in the shutdown state, cannot create a card instance\n");
3603                                 goto __error;
3604                         }
3605                         chip = usb_chip[i];
3606                         break;
3607                 }
3608         }
3609         if (! chip) {
3610                 /* it's a fresh one.
3611                  * now look for an empty slot and create a new card instance
3612                  */
3613                 for (i = 0; i < SNDRV_CARDS; i++)
3614                         if (enable[i] && ! usb_chip[i] &&
3615                             (vid[i] == -1 || vid[i] == USB_ID_VENDOR(id)) &&
3616                             (pid[i] == -1 || pid[i] == USB_ID_PRODUCT(id))) {
3617                                 if (snd_usb_audio_create(dev, i, quirk, &chip) < 0) {
3618                                         goto __error;
3619                                 }
3620                                 snd_card_set_dev(chip->card, &intf->dev);
3621                                 break;
3622                         }
3623                 if (!chip) {
3624                         printk(KERN_ERR "no available usb audio device\n");
3625                         goto __error;
3626                 }
3627         }
3628
3629         err = 1; /* continue */
3630         if (quirk && quirk->ifnum != QUIRK_NO_INTERFACE) {
3631                 /* need some special handlings */
3632                 if ((err = snd_usb_create_quirk(chip, intf, quirk)) < 0)
3633                         goto __error;
3634         }
3635
3636         if (err > 0) {
3637                 /* create normal USB audio interfaces */
3638                 if (snd_usb_create_streams(chip, ifnum) < 0 ||
3639                     snd_usb_create_mixer(chip, ifnum, ignore_ctl_error) < 0) {
3640                         goto __error;
3641                 }
3642         }
3643
3644         /* we are allowed to call snd_card_register() many times */
3645         if (snd_card_register(chip->card) < 0) {
3646                 goto __error;
3647         }
3648
3649         usb_chip[chip->index] = chip;
3650         chip->num_interfaces++;
3651         mutex_unlock(&register_mutex);
3652         return chip;
3653
3654  __error:
3655         if (chip && !chip->num_interfaces)
3656                 snd_card_free(chip->card);
3657         mutex_unlock(&register_mutex);
3658  __err_val:
3659         return NULL;
3660 }
3661
3662 /*
3663  * we need to take care of counter, since disconnection can be called also
3664  * many times as well as usb_audio_probe().
3665  */
3666 static void snd_usb_audio_disconnect(struct usb_device *dev, void *ptr)
3667 {
3668         struct snd_usb_audio *chip;
3669         struct snd_card *card;
3670         struct list_head *p;
3671
3672         if (ptr == (void *)-1L)
3673                 return;
3674
3675         chip = ptr;
3676         card = chip->card;
3677         mutex_lock(&register_mutex);
3678         chip->shutdown = 1;
3679         chip->num_interfaces--;
3680         if (chip->num_interfaces <= 0) {
3681                 snd_card_disconnect(card);
3682                 /* release the pcm resources */
3683                 list_for_each(p, &chip->pcm_list) {
3684                         snd_usb_stream_disconnect(p);
3685                 }
3686                 /* release the midi resources */
3687                 list_for_each(p, &chip->midi_list) {
3688                         snd_usbmidi_disconnect(p);
3689                 }
3690                 /* release mixer resources */
3691                 list_for_each(p, &chip->mixer_list) {
3692                         snd_usb_mixer_disconnect(p);
3693                 }
3694                 usb_chip[chip->index] = NULL;
3695                 mutex_unlock(&register_mutex);
3696                 snd_card_free_when_closed(card);
3697         } else {
3698                 mutex_unlock(&register_mutex);
3699         }
3700 }
3701
3702 /*
3703  * new 2.5 USB kernel API
3704  */
3705 static int usb_audio_probe(struct usb_interface *intf,
3706                            const struct usb_device_id *id)
3707 {
3708         void *chip;
3709         chip = snd_usb_audio_probe(interface_to_usbdev(intf), intf, id);
3710         if (chip) {
3711                 dev_set_drvdata(&intf->dev, chip);
3712                 return 0;
3713         } else
3714                 return -EIO;
3715 }
3716
3717 static void usb_audio_disconnect(struct usb_interface *intf)
3718 {
3719         snd_usb_audio_disconnect(interface_to_usbdev(intf),
3720                                  dev_get_drvdata(&intf->dev));
3721 }
3722
3723 #ifdef CONFIG_PM
3724 static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message)
3725 {
3726         struct snd_usb_audio *chip = dev_get_drvdata(&intf->dev);
3727         struct list_head *p;
3728         struct snd_usb_stream *as;
3729
3730         if (chip == (void *)-1L)
3731                 return 0;
3732
3733         snd_power_change_state(chip->card, SNDRV_CTL_POWER_D3hot);
3734         if (!chip->num_suspended_intf++) {
3735                 list_for_each(p, &chip->pcm_list) {
3736                         as = list_entry(p, struct snd_usb_stream, list);
3737                         snd_pcm_suspend_all(as->pcm);
3738                 }
3739         }
3740
3741         return 0;
3742 }
3743
3744 static int usb_audio_resume(struct usb_interface *intf)
3745 {
3746         struct snd_usb_audio *chip = dev_get_drvdata(&intf->dev);
3747
3748         if (chip == (void *)-1L)
3749                 return 0;
3750         if (--chip->num_suspended_intf)
3751                 return 0;
3752         /*
3753          * ALSA leaves material resumption to user space
3754          * we just notify
3755          */
3756
3757         snd_power_change_state(chip->card, SNDRV_CTL_POWER_D0);
3758
3759         return 0;
3760 }
3761 #endif          /* CONFIG_PM */
3762
3763 static int __init snd_usb_audio_init(void)
3764 {
3765         if (nrpacks < MIN_PACKS_URB || nrpacks > MAX_PACKS) {
3766                 printk(KERN_WARNING "invalid nrpacks value.\n");
3767                 return -EINVAL;
3768         }
3769         return usb_register(&usb_audio_driver);
3770 }
3771
3772
3773 static void __exit snd_usb_audio_cleanup(void)
3774 {
3775         usb_deregister(&usb_audio_driver);
3776 }
3777
3778 module_init(snd_usb_audio_init);
3779 module_exit(snd_usb_audio_cleanup);