SAFE public projects git trees. - safe/jmp/linux-2.6/blob - 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 <sound/driver.h>
  42 #include <linux/bitops.h>
  43 #include <linux/init.h>
  44 #include <linux/interrupt.h>
  45 #include <linux/list.h>
  46 #include <linux/slab.h>
  47 #include <linux/string.h>
  48 #include <linux/usb.h>
  49 #include <linux/vmalloc.h>
  50 #include <linux/moduleparam.h>
  51 #include <sound/core.h>
  52 #include <sound/info.h>
  53 #include <sound/pcm.h>
  54 #include <sound/pcm_params.h>
  55 #include <sound/initval.h>
  56
  57 #include "usbaudio.h"
  58
  59
  60 MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
  61 MODULE_DESCRIPTION("USB Audio");
  62 MODULE_LICENSE("GPL");
  63 MODULE_SUPPORTED_DEVICE("{{Generic,USB Audio}}");
  64
  65
  66 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;      /* Index 0-MAX */
  67 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* ID for this card */
  68 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;      /* Enable this card */
  69 static int vid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 }; /* Vendor ID for this card */
  70 static int pid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 }; /* Product ID for this card */
  71 static int nrpacks = 4;         /* max. number of packets per urb */
  72 static int async_unlink = 1;
  73
  74 module_param_array(index, int, NULL, 0444);
  75 MODULE_PARM_DESC(index, "Index value for the USB audio adapter.");
  76 module_param_array(id, charp, NULL, 0444);
  77 MODULE_PARM_DESC(id, "ID string for the USB audio adapter.");
  78 module_param_array(enable, bool, NULL, 0444);
  79 MODULE_PARM_DESC(enable, "Enable USB audio adapter.");
  80 module_param_array(vid, int, NULL, 0444);
  81 MODULE_PARM_DESC(vid, "Vendor ID for the USB audio device.");
  82 module_param_array(pid, int, NULL, 0444);
  83 MODULE_PARM_DESC(pid, "Product ID for the USB audio device.");
  84 module_param(nrpacks, int, 0644);
  85 MODULE_PARM_DESC(nrpacks, "Max. number of packets per URB.");
  86 module_param(async_unlink, bool, 0444);
  87 MODULE_PARM_DESC(async_unlink, "Use async unlink mode.");
  88
  89
  90 /*
  91  * debug the h/w constraints
  92  */
  93 /* #define HW_CONST_DEBUG */
  94
  95
  96 /*
  97  *
  98  */
  99
 100 #define MAX_PACKS       10
 101 #define MAX_PACKS_HS    (MAX_PACKS * 8) /* in high speed mode */
 102 #define MAX_URBS        8
 103 #define SYNC_URBS       4       /* always four urbs for sync */
 104 #define MIN_PACKS_URB   1       /* minimum 1 packet per urb */
 105
 106 typedef struct snd_usb_substream snd_usb_substream_t;
 107 typedef struct snd_usb_stream snd_usb_stream_t;
 108 typedef struct snd_urb_ctx snd_urb_ctx_t;
 109
 110 struct audioformat {
 111         struct list_head list;
 112         snd_pcm_format_t format;        /* format type */
 113         unsigned int channels;          /* # channels */
 114         unsigned int fmt_type;          /* USB audio format type (1-3) */
 115         unsigned int frame_size;        /* samples per frame for non-audio */
 116         int iface;                      /* interface number */
 117         unsigned char altsetting;       /* corresponding alternate setting */
 118         unsigned char altset_idx;       /* array index of altenate setting */
 119         unsigned char attributes;       /* corresponding attributes of cs endpoint */
 120         unsigned char endpoint;         /* endpoint */
 121         unsigned char ep_attr;          /* endpoint attributes */
 122         unsigned int maxpacksize;       /* max. packet size */
 123         unsigned int rates;             /* rate bitmasks */
 124         unsigned int rate_min, rate_max;        /* min/max rates */
 125         unsigned int nr_rates;          /* number of rate table entries */
 126         unsigned int *rate_table;       /* rate table */
 127 };
 128
 129 struct snd_urb_ctx {
 130         struct urb *urb;
 131         unsigned int buffer_size;       /* size of data buffer, if data URB */
 132         snd_usb_substream_t *subs;
 133         int index;      /* index for urb array */
 134         int packets;    /* number of packets per urb */
 135 };
 136
 137 struct snd_urb_ops {
 138         int (*prepare)(snd_usb_substream_t *subs, snd_pcm_runtime_t *runtime, struct urb *u);
 139         int (*retire)(snd_usb_substream_t *subs, snd_pcm_runtime_t *runtime, struct urb *u);
 140         int (*prepare_sync)(snd_usb_substream_t *subs, snd_pcm_runtime_t *runtime, struct urb *u);
 141         int (*retire_sync)(snd_usb_substream_t *subs, snd_pcm_runtime_t *runtime, struct urb *u);
 142 };
 143
 144 struct snd_usb_substream {
 145         snd_usb_stream_t *stream;
 146         struct usb_device *dev;
 147         snd_pcm_substream_t *pcm_substream;
 148         int direction;  /* playback or capture */
 149         int interface;  /* current interface */
 150         int endpoint;   /* assigned endpoint */
 151         struct audioformat *cur_audiofmt;       /* current audioformat pointer (for hw_params callback) */
 152         unsigned int cur_rate;          /* current rate (for hw_params callback) */
 153         unsigned int period_bytes;      /* current period bytes (for hw_params callback) */
 154         unsigned int format;     /* USB data format */
 155         unsigned int datapipe;   /* the data i/o pipe */
 156         unsigned int syncpipe;   /* 1 - async out or adaptive in */
 157         unsigned int datainterval;      /* log_2 of data packet interval */
 158         unsigned int syncinterval;  /* P for adaptive mode, 0 otherwise */
 159         unsigned int freqn;      /* nominal sampling rate in fs/fps in Q16.16 format */
 160         unsigned int freqm;      /* momentary sampling rate in fs/fps in Q16.16 format */
 161         unsigned int freqmax;    /* maximum sampling rate, used for buffer management */
 162         unsigned int phase;      /* phase accumulator */
 163         unsigned int maxpacksize;       /* max packet size in bytes */
 164         unsigned int maxframesize;      /* max packet size in frames */
 165         unsigned int curpacksize;       /* current packet size in bytes (for capture) */
 166         unsigned int curframesize;      /* current packet size in frames (for capture) */
 167         unsigned int fill_max: 1;       /* fill max packet size always */
 168         unsigned int fmt_type;          /* USB audio format type (1-3) */
 169         unsigned int packs_per_ms;      /* packets per millisecond (for playback) */
 170
 171         unsigned int running: 1;        /* running status */
 172
 173         unsigned int hwptr_done;                        /* processed frame position in the buffer */
 174         unsigned int transfer_done;             /* processed frames since last period update */
 175         unsigned long active_mask;      /* bitmask of active urbs */
 176         unsigned long unlink_mask;      /* bitmask of unlinked urbs */
 177
 178         unsigned int nurbs;                     /* # urbs */
 179         snd_urb_ctx_t dataurb[MAX_URBS];        /* data urb table */
 180         snd_urb_ctx_t syncurb[SYNC_URBS];       /* sync urb table */
 181         char *syncbuf;                          /* sync buffer for all sync URBs */
 182         dma_addr_t sync_dma;                    /* DMA address of syncbuf */
 183
 184         u64 formats;                    /* format bitmasks (all or'ed) */
 185         unsigned int num_formats;               /* number of supported audio formats (list) */
 186         struct list_head fmt_list;      /* format list */
 187         spinlock_t lock;
 188         struct tasklet_struct start_period_elapsed;     /* for start trigger */
 189
 190         struct snd_urb_ops ops;         /* callbacks (must be filled at init) */
 191 };
 192
 193
 194 struct snd_usb_stream {
 195         snd_usb_audio_t *chip;
 196         snd_pcm_t *pcm;
 197         int pcm_index;
 198         unsigned int fmt_type;          /* USB audio format type (1-3) */
 199         snd_usb_substream_t substream[2];
 200         struct list_head list;
 201 };
 202
 203
 204 /*
 205  * we keep the snd_usb_audio_t instances by ourselves for merging
 206  * the all interfaces on the same card as one sound device.
 207  */
 208
 209 static DECLARE_MUTEX(register_mutex);
 210 static snd_usb_audio_t *usb_chip[SNDRV_CARDS];
 211
 212
 213 /*
 214  * convert a sampling rate into our full speed format (fs/1000 in Q16.16)
 215  * this will overflow at approx 524 kHz
 216  */
 217 static inline unsigned get_usb_full_speed_rate(unsigned int rate)
 218 {
 219         return ((rate << 13) + 62) / 125;
 220 }
 221
 222 /*
 223  * convert a sampling rate into USB high speed format (fs/8000 in Q16.16)
 224  * this will overflow at approx 4 MHz
 225  */
 226 static inline unsigned get_usb_high_speed_rate(unsigned int rate)
 227 {
 228         return ((rate << 10) + 62) / 125;
 229 }
 230
 231 /* convert our full speed USB rate into sampling rate in Hz */
 232 static inline unsigned get_full_speed_hz(unsigned int usb_rate)
 233 {
 234         return (usb_rate * 125 + (1 << 12)) >> 13;
 235 }
 236
 237 /* convert our high speed USB rate into sampling rate in Hz */
 238 static inline unsigned get_high_speed_hz(unsigned int usb_rate)
 239 {
 240         return (usb_rate * 125 + (1 << 9)) >> 10;
 241 }
 242
 243
 244 /*
 245  * prepare urb for full speed capture sync pipe
 246  *
 247  * fill the length and offset of each urb descriptor.
 248  * the fixed 10.14 frequency is passed through the pipe.
 249  */
 250 static int prepare_capture_sync_urb(snd_usb_substream_t *subs,
 251                                     snd_pcm_runtime_t *runtime,
 252                                     struct urb *urb)
 253 {
 254         unsigned char *cp = urb->transfer_buffer;
 255         snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
 256
 257         urb->dev = ctx->subs->dev; /* we need to set this at each time */
 258         urb->iso_frame_desc[0].length = 3;
 259         urb->iso_frame_desc[0].offset = 0;
 260         cp[0] = subs->freqn >> 2;
 261         cp[1] = subs->freqn >> 10;
 262         cp[2] = subs->freqn >> 18;
 263         return 0;
 264 }
 265
 266 /*
 267  * prepare urb for high speed capture sync pipe
 268  *
 269  * fill the length and offset of each urb descriptor.
 270  * the fixed 12.13 frequency is passed as 16.16 through the pipe.
 271  */
 272 static int prepare_capture_sync_urb_hs(snd_usb_substream_t *subs,
 273                                        snd_pcm_runtime_t *runtime,
 274                                        struct urb *urb)
 275 {
 276         unsigned char *cp = urb->transfer_buffer;
 277         snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
 278
 279         urb->dev = ctx->subs->dev; /* we need to set this at each time */
 280         urb->iso_frame_desc[0].length = 4;
 281         urb->iso_frame_desc[0].offset = 0;
 282         cp[0] = subs->freqn;
 283         cp[1] = subs->freqn >> 8;
 284         cp[2] = subs->freqn >> 16;
 285         cp[3] = subs->freqn >> 24;
 286         return 0;
 287 }
 288
 289 /*
 290  * process after capture sync complete
 291  * - nothing to do
 292  */
 293 static int retire_capture_sync_urb(snd_usb_substream_t *subs,
 294                                    snd_pcm_runtime_t *runtime,
 295                                    struct urb *urb)
 296 {
 297         return 0;
 298 }
 299
 300 /*
 301  * prepare urb for capture data pipe
 302  *
 303  * fill the offset and length of each descriptor.
 304  *
 305  * we use a temporary buffer to write the captured data.
 306  * since the length of written data is determined by host, we cannot
 307  * write onto the pcm buffer directly...  the data is thus copied
 308  * later at complete callback to the global buffer.
 309  */
 310 static int prepare_capture_urb(snd_usb_substream_t *subs,
 311                                snd_pcm_runtime_t *runtime,
 312                                struct urb *urb)
 313 {
 314         int i, offs;
 315         snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
 316
 317         offs = 0;
 318         urb->dev = ctx->subs->dev; /* we need to set this at each time */
 319         for (i = 0; i < ctx->packets; i++) {
 320                 urb->iso_frame_desc[i].offset = offs;
 321                 urb->iso_frame_desc[i].length = subs->curpacksize;
 322                 offs += subs->curpacksize;
 323         }
 324         urb->transfer_buffer_length = offs;
 325         urb->number_of_packets = ctx->packets;
 326 #if 0 // for check
 327         if (! urb->bandwidth) {
 328                 int bustime;
 329                 bustime = usb_check_bandwidth(urb->dev, urb);
 330                 if (bustime < 0)
 331                         return bustime;
 332                 printk("urb %d: bandwidth = %d (packets = %d)\n", ctx->index, bustime, urb->number_of_packets);
 333                 usb_claim_bandwidth(urb->dev, urb, bustime, 1);
 334         }
 335 #endif // for check
 336         return 0;
 337 }
 338
 339 /*
 340  * process after capture complete
 341  *
 342  * copy the data from each desctiptor to the pcm buffer, and
 343  * update the current position.
 344  */
 345 static int retire_capture_urb(snd_usb_substream_t *subs,
 346                               snd_pcm_runtime_t *runtime,
 347                               struct urb *urb)
 348 {
 349         unsigned long flags;
 350         unsigned char *cp;
 351         int i;
 352         unsigned int stride, len, oldptr;
 353         int period_elapsed = 0;
 354
 355         stride = runtime->frame_bits >> 3;
 356
 357         for (i = 0; i < urb->number_of_packets; i++) {
 358                 cp = (unsigned char *)urb->transfer_buffer + urb->iso_frame_desc[i].offset;
 359                 if (urb->iso_frame_desc[i].status) {
 360                         snd_printd(KERN_ERR "frame %d active: %d\n", i, urb->iso_frame_desc[i].status);
 361                         // continue;
 362                 }
 363                 len = urb->iso_frame_desc[i].actual_length / stride;
 364                 if (! len)
 365                         continue;
 366                 /* update the current pointer */
 367                 spin_lock_irqsave(&subs->lock, flags);
 368                 oldptr = subs->hwptr_done;
 369                 subs->hwptr_done += len;
 370                 if (subs->hwptr_done >= runtime->buffer_size)
 371                         subs->hwptr_done -= runtime->buffer_size;
 372                 subs->transfer_done += len;
 373                 if (subs->transfer_done >= runtime->period_size) {
 374                         subs->transfer_done -= runtime->period_size;
 375                         period_elapsed = 1;
 376                 }
 377                 spin_unlock_irqrestore(&subs->lock, flags);
 378                 /* copy a data chunk */
 379                 if (oldptr + len > runtime->buffer_size) {
 380                         unsigned int cnt = runtime->buffer_size - oldptr;
 381                         unsigned int blen = cnt * stride;
 382                         memcpy(runtime->dma_area + oldptr * stride, cp, blen);
 383                         memcpy(runtime->dma_area, cp + blen, len * stride - blen);
 384                 } else {
 385                         memcpy(runtime->dma_area + oldptr * stride, cp, len * stride);
 386                 }
 387         }
 388         if (period_elapsed)
 389                 snd_pcm_period_elapsed(subs->pcm_substream);
 390         return 0;
 391 }
 392
 393
 394 /*
 395  * prepare urb for full speed playback sync pipe
 396  *
 397  * set up the offset and length to receive the current frequency.
 398  */
 399
 400 static int prepare_playback_sync_urb(snd_usb_substream_t *subs,
 401                                      snd_pcm_runtime_t *runtime,
 402                                      struct urb *urb)
 403 {
 404         snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
 405
 406         urb->dev = ctx->subs->dev; /* we need to set this at each time */
 407         urb->iso_frame_desc[0].length = 3;
 408         urb->iso_frame_desc[0].offset = 0;
 409         return 0;
 410 }
 411
 412 /*
 413  * prepare urb for high speed playback sync pipe
 414  *
 415  * set up the offset and length to receive the current frequency.
 416  */
 417
 418 static int prepare_playback_sync_urb_hs(snd_usb_substream_t *subs,
 419                                         snd_pcm_runtime_t *runtime,
 420                                         struct urb *urb)
 421 {
 422         snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
 423
 424         urb->dev = ctx->subs->dev; /* we need to set this at each time */
 425         urb->iso_frame_desc[0].length = 4;
 426         urb->iso_frame_desc[0].offset = 0;
 427         return 0;
 428 }
 429
 430 /*
 431  * process after full speed playback sync complete
 432  *
 433  * retrieve the current 10.14 frequency from pipe, and set it.
 434  * the value is referred in prepare_playback_urb().
 435  */
 436 static int retire_playback_sync_urb(snd_usb_substream_t *subs,
 437                                     snd_pcm_runtime_t *runtime,
 438                                     struct urb *urb)
 439 {
 440         unsigned int f;
 441         unsigned long flags;
 442
 443         if (urb->iso_frame_desc[0].status == 0 &&
 444             urb->iso_frame_desc[0].actual_length == 3) {
 445                 f = combine_triple((u8*)urb->transfer_buffer) << 2;
 446                 if (f >= subs->freqn - subs->freqn / 8 && f <= subs->freqmax) {
 447                         spin_lock_irqsave(&subs->lock, flags);
 448                         subs->freqm = f;
 449                         spin_unlock_irqrestore(&subs->lock, flags);
 450                 }
 451         }
 452
 453         return 0;
 454 }
 455
 456 /*
 457  * process after high speed playback sync complete
 458  *
 459  * retrieve the current 12.13 frequency from pipe, and set it.
 460  * the value is referred in prepare_playback_urb().
 461  */
 462 static int retire_playback_sync_urb_hs(snd_usb_substream_t *subs,
 463                                        snd_pcm_runtime_t *runtime,
 464                                        struct urb *urb)
 465 {
 466         unsigned int f;
 467         unsigned long flags;
 468
 469         if (urb->iso_frame_desc[0].status == 0 &&
 470             urb->iso_frame_desc[0].actual_length == 4) {
 471                 f = combine_quad((u8*)urb->transfer_buffer) & 0x0fffffff;
 472                 if (f >= subs->freqn - subs->freqn / 8 && f <= subs->freqmax) {
 473                         spin_lock_irqsave(&subs->lock, flags);
 474                         subs->freqm = f;
 475                         spin_unlock_irqrestore(&subs->lock, flags);
 476                 }
 477         }
 478
 479         return 0;
 480 }
 481
 482 /*
 483  * prepare urb for playback data pipe
 484  *
 485  * Since a URB can handle only a single linear buffer, we must use double
 486  * buffering when the data to be transferred overflows the buffer boundary.
 487  * To avoid inconsistencies when updating hwptr_done, we use double buffering
 488  * for all URBs.
 489  */
 490 static int prepare_playback_urb(snd_usb_substream_t *subs,
 491                                 snd_pcm_runtime_t *runtime,
 492                                 struct urb *urb)
 493 {
 494         int i, stride, offs;
 495         unsigned int counts;
 496         unsigned long flags;
 497         int period_elapsed = 0;
 498         snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
 499
 500         stride = runtime->frame_bits >> 3;
 501
 502         offs = 0;
 503         urb->dev = ctx->subs->dev; /* we need to set this at each time */
 504         urb->number_of_packets = 0;
 505         spin_lock_irqsave(&subs->lock, flags);
 506         for (i = 0; i < ctx->packets; i++) {
 507                 /* calculate the size of a packet */
 508                 if (subs->fill_max)
 509                         counts = subs->maxframesize; /* fixed */
 510                 else {
 511                         subs->phase = (subs->phase & 0xffff)
 512                                 + (subs->freqm << subs->datainterval);
 513                         counts = subs->phase >> 16;
 514                         if (counts > subs->maxframesize)
 515                                 counts = subs->maxframesize;
 516                 }
 517                 /* set up descriptor */
 518                 urb->iso_frame_desc[i].offset = offs * stride;
 519                 urb->iso_frame_desc[i].length = counts * stride;
 520                 offs += counts;
 521                 urb->number_of_packets++;
 522                 subs->transfer_done += counts;
 523                 if (subs->transfer_done >= runtime->period_size) {
 524                         subs->transfer_done -= runtime->period_size;
 525                         period_elapsed = 1;
 526                         if (subs->fmt_type == USB_FORMAT_TYPE_II) {
 527                                 if (subs->transfer_done > 0) {
 528                                         /* FIXME: fill-max mode is not
 529                                          * supported yet */
 530                                         offs -= subs->transfer_done;
 531                                         counts -= subs->transfer_done;
 532                                         urb->iso_frame_desc[i].length =
 533                                                 counts * stride;
 534                                         subs->transfer_done = 0;
 535                                 }
 536                                 i++;
 537                                 if (i < ctx->packets) {
 538                                         /* add a transfer delimiter */
 539                                         urb->iso_frame_desc[i].offset =
 540                                                 offs * stride;
 541                                         urb->iso_frame_desc[i].length = 0;
 542                                         urb->number_of_packets++;
 543                                 }
 544                                 break;
 545                         }
 546                 }
 547                 /* finish at the frame boundary at/after the period boundary */
 548                 if (period_elapsed &&
 549                     (i & (subs->packs_per_ms - 1)) == subs->packs_per_ms - 1)
 550                         break;
 551         }
 552         if (subs->hwptr_done + offs > runtime->buffer_size) {
 553                 /* err, the transferred area goes over buffer boundary. */
 554                 unsigned int len = runtime->buffer_size - subs->hwptr_done;
 555                 memcpy(urb->transfer_buffer,
 556                        runtime->dma_area + subs->hwptr_done * stride,
 557                        len * stride);
 558                 memcpy(urb->transfer_buffer + len * stride,
 559                        runtime->dma_area,
 560                        (offs - len) * stride);
 561         } else {
 562                 memcpy(urb->transfer_buffer,
 563                        runtime->dma_area + subs->hwptr_done * stride,
 564                        offs * stride);
 565         }
 566         subs->hwptr_done += offs;
 567         if (subs->hwptr_done >= runtime->buffer_size)
 568                 subs->hwptr_done -= runtime->buffer_size;
 569         spin_unlock_irqrestore(&subs->lock, flags);
 570         urb->transfer_buffer_length = offs * stride;
 571         if (period_elapsed) {
 572                 if (likely(subs->running))
 573                         snd_pcm_period_elapsed(subs->pcm_substream);
 574                 else
 575                         tasklet_hi_schedule(&subs->start_period_elapsed);
 576         }
 577         return 0;
 578 }
 579
 580 /*
 581  * process after playback data complete
 582  * - nothing to do
 583  */
 584 static int retire_playback_urb(snd_usb_substream_t *subs,
 585                                snd_pcm_runtime_t *runtime,
 586                                struct urb *urb)
 587 {
 588         return 0;
 589 }
 590
 591 /*
 592  * Delay the snd_pcm_period_elapsed() call until after the start trigger
 593  * callback so that we're not longer in the substream's lock.
 594  */
 595 static void start_period_elapsed(unsigned long data)
 596 {
 597         snd_usb_substream_t *subs = (snd_usb_substream_t *)data;
 598         snd_pcm_period_elapsed(subs->pcm_substream);
 599 }
 600
 601
 602 /*
 603  */
 604 static struct snd_urb_ops audio_urb_ops[2] = {
 605         {
 606                 .prepare =      prepare_playback_urb,
 607                 .retire =       retire_playback_urb,
 608                 .prepare_sync = prepare_playback_sync_urb,
 609                 .retire_sync =  retire_playback_sync_urb,
 610         },
 611         {
 612                 .prepare =      prepare_capture_urb,
 613                 .retire =       retire_capture_urb,
 614                 .prepare_sync = prepare_capture_sync_urb,
 615                 .retire_sync =  retire_capture_sync_urb,
 616         },
 617 };
 618
 619 static struct snd_urb_ops audio_urb_ops_high_speed[2] = {
 620         {
 621                 .prepare =      prepare_playback_urb,
 622                 .retire =       retire_playback_urb,
 623                 .prepare_sync = prepare_playback_sync_urb_hs,
 624                 .retire_sync =  retire_playback_sync_urb_hs,
 625         },
 626         {
 627                 .prepare =      prepare_capture_urb,
 628                 .retire =       retire_capture_urb,
 629                 .prepare_sync = prepare_capture_sync_urb_hs,
 630                 .retire_sync =  retire_capture_sync_urb,
 631         },
 632 };
 633
 634 /*
 635  * complete callback from data urb
 636  */
 637 static void snd_complete_urb(struct urb *urb, struct pt_regs *regs)
 638 {
 639         snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
 640         snd_usb_substream_t *subs = ctx->subs;
 641         snd_pcm_substream_t *substream = ctx->subs->pcm_substream;
 642         int err = 0;
 643
 644         if ((subs->running && subs->ops.retire(subs, substream->runtime, urb)) ||
 645             ! subs->running || /* can be stopped during retire callback */
 646             (err = subs->ops.prepare(subs, substream->runtime, urb)) < 0 ||
 647             (err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
 648                 clear_bit(ctx->index, &subs->active_mask);
 649                 if (err < 0) {
 650                         snd_printd(KERN_ERR "cannot submit urb (err = %d)\n", err);
 651                         snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
 652                 }
 653         }
 654 }
 655
 656
 657 /*
 658  * complete callback from sync urb
 659  */
 660 static void snd_complete_sync_urb(struct urb *urb, struct pt_regs *regs)
 661 {
 662         snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
 663         snd_usb_substream_t *subs = ctx->subs;
 664         snd_pcm_substream_t *substream = ctx->subs->pcm_substream;
 665         int err = 0;
 666
 667         if ((subs->running && subs->ops.retire_sync(subs, substream->runtime, urb)) ||
 668             ! subs->running || /* can be stopped during retire callback */
 669             (err = subs->ops.prepare_sync(subs, substream->runtime, urb)) < 0 ||
 670             (err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
 671                 clear_bit(ctx->index + 16, &subs->active_mask);
 672                 if (err < 0) {
 673                         snd_printd(KERN_ERR "cannot submit sync urb (err = %d)\n", err);
 674                         snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
 675                 }
 676         }
 677 }
 678
 679
 680 /* get the physical page pointer at the given offset */
 681 static struct page *snd_pcm_get_vmalloc_page(snd_pcm_substream_t *subs,
 682                                              unsigned long offset)
 683 {
 684         void *pageptr = subs->runtime->dma_area + offset;
 685         return vmalloc_to_page(pageptr);
 686 }
 687
 688 /* allocate virtual buffer; may be called more than once */
 689 static int snd_pcm_alloc_vmalloc_buffer(snd_pcm_substream_t *subs, size_t size)
 690 {
 691         snd_pcm_runtime_t *runtime = subs->runtime;
 692         if (runtime->dma_area) {
 693                 if (runtime->dma_bytes >= size)
 694                         return 0; /* already large enough */
 695                 vfree(runtime->dma_area);
 696         }
 697         runtime->dma_area = vmalloc(size);
 698         if (! runtime->dma_area)
 699                 return -ENOMEM;
 700         runtime->dma_bytes = size;
 701         return 0;
 702 }
 703
 704 /* free virtual buffer; may be called more than once */
 705 static int snd_pcm_free_vmalloc_buffer(snd_pcm_substream_t *subs)
 706 {
 707         snd_pcm_runtime_t *runtime = subs->runtime;
 708         if (runtime->dma_area) {
 709                 vfree(runtime->dma_area);
 710                 runtime->dma_area = NULL;
 711         }
 712         return 0;
 713 }
 714
 715
 716 /*
 717  * unlink active urbs.
 718  */
 719 static int deactivate_urbs(snd_usb_substream_t *subs, int force, int can_sleep)
 720 {
 721         unsigned int i;
 722         int async;
 723
 724         subs->running = 0;
 725
 726         if (!force && subs->stream->chip->shutdown) /* to be sure... */
 727                 return -EBADFD;
 728
 729         async = !can_sleep && async_unlink;
 730
 731         if (! async && in_interrupt())
 732                 return 0;
 733
 734         for (i = 0; i < subs->nurbs; i++) {
 735                 if (test_bit(i, &subs->active_mask)) {
 736                         if (! test_and_set_bit(i, &subs->unlink_mask)) {
 737                                 struct urb *u = subs->dataurb[i].urb;
 738                                 if (async)
 739                                         usb_unlink_urb(u);
 740                                 else
 741                                         usb_kill_urb(u);
 742                         }
 743                 }
 744         }
 745         if (subs->syncpipe) {
 746                 for (i = 0; i < SYNC_URBS; i++) {
 747                         if (test_bit(i+16, &subs->active_mask)) {
 748                                 if (! test_and_set_bit(i+16, &subs->unlink_mask)) {
 749                                         struct urb *u = subs->syncurb[i].urb;
 750                                         if (async)
 751                                                 usb_unlink_urb(u);
 752                                         else
 753                                                 usb_kill_urb(u);
 754                                 }
 755                         }
 756                 }
 757         }
 758         return 0;
 759 }
 760
 761
 762 /*
 763  * set up and start data/sync urbs
 764  */
 765 static int start_urbs(snd_usb_substream_t *subs, snd_pcm_runtime_t *runtime)
 766 {
 767         unsigned int i;
 768         int err;
 769
 770         if (subs->stream->chip->shutdown)
 771                 return -EBADFD;
 772
 773         for (i = 0; i < subs->nurbs; i++) {
 774                 snd_assert(subs->dataurb[i].urb, return -EINVAL);
 775                 if (subs->ops.prepare(subs, runtime, subs->dataurb[i].urb) < 0) {
 776                         snd_printk(KERN_ERR "cannot prepare datapipe for urb %d\n", i);
 777                         goto __error;
 778                 }
 779         }
 780         if (subs->syncpipe) {
 781                 for (i = 0; i < SYNC_URBS; i++) {
 782                         snd_assert(subs->syncurb[i].urb, return -EINVAL);
 783                         if (subs->ops.prepare_sync(subs, runtime, subs->syncurb[i].urb) < 0) {
 784                                 snd_printk(KERN_ERR "cannot prepare syncpipe for urb %d\n", i);
 785                                 goto __error;
 786                         }
 787                 }
 788         }
 789
 790         subs->active_mask = 0;
 791         subs->unlink_mask = 0;
 792         subs->running = 1;
 793         for (i = 0; i < subs->nurbs; i++) {
 794                 if ((err = usb_submit_urb(subs->dataurb[i].urb, GFP_ATOMIC)) < 0) {
 795                         snd_printk(KERN_ERR "cannot submit datapipe for urb %d, err = %d\n", i, err);
 796                         goto __error;
 797                 }
 798                 set_bit(i, &subs->active_mask);
 799         }
 800         if (subs->syncpipe) {
 801                 for (i = 0; i < SYNC_URBS; i++) {
 802                         if ((err = usb_submit_urb(subs->syncurb[i].urb, GFP_ATOMIC)) < 0) {
 803                                 snd_printk(KERN_ERR "cannot submit syncpipe for urb %d, err = %d\n", i, err);
 804                                 goto __error;
 805                         }
 806                         set_bit(i + 16, &subs->active_mask);
 807                 }
 808         }
 809         return 0;
 810
 811  __error:
 812         // snd_pcm_stop(subs->pcm_substream, SNDRV_PCM_STATE_XRUN);
 813         deactivate_urbs(subs, 0, 0);
 814         return -EPIPE;
 815 }
 816
 817
 818 /*
 819  *  wait until all urbs are processed.
 820  */
 821 static int wait_clear_urbs(snd_usb_substream_t *subs)
 822 {
 823         unsigned long end_time = jiffies + msecs_to_jiffies(1000);
 824         unsigned int i;
 825         int alive;
 826
 827         do {
 828                 alive = 0;
 829                 for (i = 0; i < subs->nurbs; i++) {
 830                         if (test_bit(i, &subs->active_mask))
 831                                 alive++;
 832                 }
 833                 if (subs->syncpipe) {
 834                         for (i = 0; i < SYNC_URBS; i++) {
 835                                 if (test_bit(i + 16, &subs->active_mask))
 836                                         alive++;
 837                         }
 838                 }
 839                 if (! alive)
 840                         break;
 841                 schedule_timeout_uninterruptible(1);
 842         } while (time_before(jiffies, end_time));
 843         if (alive)
 844                 snd_printk(KERN_ERR "timeout: still %d active urbs..\n", alive);
 845         return 0;
 846 }
 847
 848
 849 /*
 850  * return the current pcm pointer.  just return the hwptr_done value.
 851  */
 852 static snd_pcm_uframes_t snd_usb_pcm_pointer(snd_pcm_substream_t *substream)
 853 {
 854         snd_usb_substream_t *subs;
 855         snd_pcm_uframes_t hwptr_done;
 856
 857         subs = (snd_usb_substream_t *)substream->runtime->private_data;
 858         spin_lock(&subs->lock);
 859         hwptr_done = subs->hwptr_done;
 860         spin_unlock(&subs->lock);
 861         return hwptr_done;
 862 }
 863
 864
 865 /*
 866  * start/stop substream
 867  */
 868 static int snd_usb_pcm_trigger(snd_pcm_substream_t *substream, int cmd)
 869 {
 870         snd_usb_substream_t *subs = (snd_usb_substream_t *)substream->runtime->private_data;
 871         int err;
 872
 873         switch (cmd) {
 874         case SNDRV_PCM_TRIGGER_START:
 875                 err = start_urbs(subs, substream->runtime);
 876                 break;
 877         case SNDRV_PCM_TRIGGER_STOP:
 878                 err = deactivate_urbs(subs, 0, 0);
 879                 break;
 880         default:
 881                 err = -EINVAL;
 882                 break;
 883         }
 884         return err < 0 ? err : 0;
 885 }
 886
 887
 888 /*
 889  * release a urb data
 890  */
 891 static void release_urb_ctx(snd_urb_ctx_t *u)
 892 {
 893         if (u->urb) {
 894                 if (u->buffer_size)
 895                         usb_buffer_free(u->subs->dev, u->buffer_size,
 896                                         u->urb->transfer_buffer,
 897                                         u->urb->transfer_dma);
 898                 usb_free_urb(u->urb);
 899                 u->urb = NULL;
 900         }
 901 }
 902
 903 /*
 904  * release a substream
 905  */
 906 static void release_substream_urbs(snd_usb_substream_t *subs, int force)
 907 {
 908         int i;
 909
 910         /* stop urbs (to be sure) */
 911         deactivate_urbs(subs, force, 1);
 912         wait_clear_urbs(subs);
 913
 914         for (i = 0; i < MAX_URBS; i++)
 915                 release_urb_ctx(&subs->dataurb[i]);
 916         for (i = 0; i < SYNC_URBS; i++)
 917                 release_urb_ctx(&subs->syncurb[i]);
 918         usb_buffer_free(subs->dev, SYNC_URBS * 4,
 919                         subs->syncbuf, subs->sync_dma);
 920         subs->syncbuf = NULL;
 921         subs->nurbs = 0;
 922 }
 923
 924 /*
 925  * initialize a substream for plaback/capture
 926  */
 927 static int init_substream_urbs(snd_usb_substream_t *subs, unsigned int period_bytes,
 928                                unsigned int rate, unsigned int frame_bits)
 929 {
 930         unsigned int maxsize, n, i;
 931         int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK;
 932         unsigned int npacks[MAX_URBS], urb_packs, total_packs, packs_per_ms;
 933
 934         /* calculate the frequency in 16.16 format */
 935         if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
 936                 subs->freqn = get_usb_full_speed_rate(rate);
 937         else
 938                 subs->freqn = get_usb_high_speed_rate(rate);
 939         subs->freqm = subs->freqn;
 940         /* calculate max. frequency */
 941         if (subs->maxpacksize) {
 942                 /* whatever fits into a max. size packet */
 943                 maxsize = subs->maxpacksize;
 944                 subs->freqmax = (maxsize / (frame_bits >> 3))
 945                                 << (16 - subs->datainterval);
 946         } else {
 947                 /* no max. packet size: just take 25% higher than nominal */
 948                 subs->freqmax = subs->freqn + (subs->freqn >> 2);
 949                 maxsize = ((subs->freqmax + 0xffff) * (frame_bits >> 3))
 950                                 >> (16 - subs->datainterval);
 951         }
 952         subs->phase = 0;
 953
 954         if (subs->fill_max)
 955                 subs->curpacksize = subs->maxpacksize;
 956         else
 957                 subs->curpacksize = maxsize;
 958
 959         if (snd_usb_get_speed(subs->dev) == USB_SPEED_HIGH)
 960                 packs_per_ms = 8 >> subs->datainterval;
 961         else
 962                 packs_per_ms = 1;
 963         subs->packs_per_ms = packs_per_ms;
 964
 965         if (is_playback) {
 966                 urb_packs = nrpacks;
 967                 urb_packs = max(urb_packs, (unsigned int)MIN_PACKS_URB);
 968                 urb_packs = min(urb_packs, (unsigned int)MAX_PACKS);
 969         } else
 970                 urb_packs = 1;
 971         urb_packs *= packs_per_ms;
 972
 973         /* decide how many packets to be used */
 974         if (is_playback) {
 975                 unsigned int minsize;
 976                 /* determine how small a packet can be */
 977                 minsize = (subs->freqn >> (16 - subs->datainterval))
 978                           * (frame_bits >> 3);
 979                 /* with sync from device, assume it can be 12% lower */
 980                 if (subs->syncpipe)
 981                         minsize -= minsize >> 3;
 982                 minsize = max(minsize, 1u);
 983                 total_packs = (period_bytes + minsize - 1) / minsize;
 984                 /* round up to multiple of packs_per_ms */
 985                 total_packs = (total_packs + packs_per_ms - 1)
 986                                 & ~(packs_per_ms - 1);
 987                 /* we need at least two URBs for queueing */
 988                 if (total_packs < 2 * MIN_PACKS_URB * packs_per_ms)
 989                         total_packs = 2 * MIN_PACKS_URB * packs_per_ms;
 990         } else {
 991                 total_packs = MAX_URBS * urb_packs;
 992         }
 993         subs->nurbs = (total_packs + urb_packs - 1) / urb_packs;
 994         if (subs->nurbs > MAX_URBS) {
 995                 /* too much... */
 996                 subs->nurbs = MAX_URBS;
 997                 total_packs = MAX_URBS * urb_packs;
 998         }
 999         n = total_packs;
1000         for (i = 0; i < subs->nurbs; i++) {
1001                 npacks[i] = n > urb_packs ? urb_packs : n;
1002                 n -= urb_packs;
1003         }
1004         if (subs->nurbs <= 1) {
1005                 /* too little - we need at least two packets
1006                  * to ensure contiguous playback/capture
1007                  */
1008                 subs->nurbs = 2;
1009                 npacks[0] = (total_packs + 1) / 2;
1010                 npacks[1] = total_packs - npacks[0];
1011         } else if (npacks[subs->nurbs-1] < MIN_PACKS_URB * packs_per_ms) {
1012                 /* the last packet is too small.. */
1013                 if (subs->nurbs > 2) {
1014                         /* merge to the first one */
1015                         npacks[0] += npacks[subs->nurbs - 1];
1016                         subs->nurbs--;
1017                 } else {
1018                         /* divide to two */
1019                         subs->nurbs = 2;
1020                         npacks[0] = (total_packs + 1) / 2;
1021                         npacks[1] = total_packs - npacks[0];
1022                 }
1023         }
1024
1025         /* allocate and initialize data urbs */
1026         for (i = 0; i < subs->nurbs; i++) {
1027                 snd_urb_ctx_t *u = &subs->dataurb[i];
1028                 u->index = i;
1029                 u->subs = subs;
1030                 u->packets = npacks[i];
1031                 u->buffer_size = maxsize * u->packets;
1032                 if (subs->fmt_type == USB_FORMAT_TYPE_II)
1033                         u->packets++; /* for transfer delimiter */
1034                 u->urb = usb_alloc_urb(u->packets, GFP_KERNEL);
1035                 if (! u->urb)
1036                         goto out_of_memory;
1037                 u->urb->transfer_buffer =
1038                         usb_buffer_alloc(subs->dev, u->buffer_size, GFP_KERNEL,
1039                                          &u->urb->transfer_dma);
1040                 if (! u->urb->transfer_buffer)
1041                         goto out_of_memory;
1042                 u->urb->pipe = subs->datapipe;
1043                 u->urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
1044                 u->urb->interval = 1 << subs->datainterval;
1045                 u->urb->context = u;
1046                 u->urb->complete = snd_complete_urb;
1047         }
1048
1049         if (subs->syncpipe) {
1050                 /* allocate and initialize sync urbs */
1051                 subs->syncbuf = usb_buffer_alloc(subs->dev, SYNC_URBS * 4,
1052                                                  GFP_KERNEL, &subs->sync_dma);
1053                 if (! subs->syncbuf)
1054                         goto out_of_memory;
1055                 for (i = 0; i < SYNC_URBS; i++) {
1056                         snd_urb_ctx_t *u = &subs->syncurb[i];
1057                         u->index = i;
1058                         u->subs = subs;
1059                         u->packets = 1;
1060                         u->urb = usb_alloc_urb(1, GFP_KERNEL);
1061                         if (! u->urb)
1062                                 goto out_of_memory;
1063                         u->urb->transfer_buffer = subs->syncbuf + i * 4;
1064                         u->urb->transfer_dma = subs->sync_dma + i * 4;
1065                         u->urb->transfer_buffer_length = 4;
1066                         u->urb->pipe = subs->syncpipe;
1067                         u->urb->transfer_flags = URB_ISO_ASAP |
1068                                                  URB_NO_TRANSFER_DMA_MAP;
1069                         u->urb->number_of_packets = 1;
1070                         u->urb->interval = 1 << subs->syncinterval;
1071                         u->urb->context = u;
1072                         u->urb->complete = snd_complete_sync_urb;
1073                 }
1074         }
1075         return 0;
1076
1077 out_of_memory:
1078         release_substream_urbs(subs, 0);
1079         return -ENOMEM;
1080 }
1081
1082
1083 /*
1084  * find a matching audio format
1085  */
1086 static struct audioformat *find_format(snd_usb_substream_t *subs, unsigned int format,
1087                                        unsigned int rate, unsigned int channels)
1088 {
1089         struct list_head *p;
1090         struct audioformat *found = NULL;
1091         int cur_attr = 0, attr;
1092
1093         list_for_each(p, &subs->fmt_list) {
1094                 struct audioformat *fp;
1095                 fp = list_entry(p, struct audioformat, list);
1096                 if (fp->format != format || fp->channels != channels)
1097                         continue;
1098                 if (rate < fp->rate_min || rate > fp->rate_max)
1099                         continue;
1100                 if (! (fp->rates & SNDRV_PCM_RATE_CONTINUOUS)) {
1101                         unsigned int i;
1102                         for (i = 0; i < fp->nr_rates; i++)
1103                                 if (fp->rate_table[i] == rate)
1104                                         break;
1105                         if (i >= fp->nr_rates)
1106                                 continue;
1107                 }
1108                 attr = fp->ep_attr & EP_ATTR_MASK;
1109                 if (! found) {
1110                         found = fp;
1111                         cur_attr = attr;
1112                         continue;
1113                 }
1114                 /* avoid async out and adaptive in if the other method
1115                  * supports the same format.
1116                  * this is a workaround for the case like
1117                  * M-audio audiophile USB.
1118                  */
1119                 if (attr != cur_attr) {
1120                         if ((attr == EP_ATTR_ASYNC &&
1121                              subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
1122                             (attr == EP_ATTR_ADAPTIVE &&
1123                              subs->direction == SNDRV_PCM_STREAM_CAPTURE))
1124                                 continue;
1125                         if ((cur_attr == EP_ATTR_ASYNC &&
1126                              subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
1127                             (cur_attr == EP_ATTR_ADAPTIVE &&
1128                              subs->direction == SNDRV_PCM_STREAM_CAPTURE)) {
1129                                 found = fp;
1130                                 cur_attr = attr;
1131                                 continue;
1132                         }
1133                 }
1134                 /* find the format with the largest max. packet size */
1135                 if (fp->maxpacksize > found->maxpacksize) {
1136                         found = fp;
1137                         cur_attr = attr;
1138                 }
1139         }
1140         return found;
1141 }
1142
1143
1144 /*
1145  * initialize the picth control and sample rate
1146  */
1147 static int init_usb_pitch(struct usb_device *dev, int iface,
1148                           struct usb_host_interface *alts,
1149                           struct audioformat *fmt)
1150 {
1151         unsigned int ep;
1152         unsigned char data[1];
1153         int err;
1154
1155         ep = get_endpoint(alts, 0)->bEndpointAddress;
1156         /* if endpoint has pitch control, enable it */
1157         if (fmt->attributes & EP_CS_ATTR_PITCH_CONTROL) {
1158                 data[0] = 1;
1159                 if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR,
1160                                            USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
1161                                            PITCH_CONTROL << 8, ep, data, 1, 1000)) < 0) {
1162                         snd_printk(KERN_ERR "%d:%d:%d: cannot set enable PITCH\n",
1163                                    dev->devnum, iface, ep);
1164                         return err;
1165                 }
1166         }
1167         return 0;
1168 }
1169
1170 static int init_usb_sample_rate(struct usb_device *dev, int iface,
1171                                 struct usb_host_interface *alts,
1172                                 struct audioformat *fmt, int rate)
1173 {
1174         unsigned int ep;
1175         unsigned char data[3];
1176         int err;
1177
1178         ep = get_endpoint(alts, 0)->bEndpointAddress;
1179         /* if endpoint has sampling rate control, set it */
1180         if (fmt->attributes & EP_CS_ATTR_SAMPLE_RATE) {
1181                 int crate;
1182                 data[0] = rate;
1183                 data[1] = rate >> 8;
1184                 data[2] = rate >> 16;
1185                 if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR,
1186                                            USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
1187                                            SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) {
1188                         snd_printk(KERN_ERR "%d:%d:%d: cannot set freq %d to ep 0x%x\n",
1189                                    dev->devnum, iface, fmt->altsetting, rate, ep);
1190                         return err;
1191                 }
1192                 if ((err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR,
1193                                            USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_IN,
1194                                            SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) {
1195                         snd_printk(KERN_WARNING "%d:%d:%d: cannot get freq at ep 0x%x\n",
1196                                    dev->devnum, iface, fmt->altsetting, ep);
1197                         return 0; /* some devices don't support reading */
1198                 }
1199                 crate = data[0] | (data[1] << 8) | (data[2] << 16);
1200                 if (crate != rate) {
1201                         snd_printd(KERN_WARNING "current rate %d is different from the runtime rate %d\n", crate, rate);
1202                         // runtime->rate = crate;
1203                 }
1204         }
1205         return 0;
1206 }
1207
1208 /*
1209  * find a matching format and set up the interface
1210  */
1211 static int set_format(snd_usb_substream_t *subs, struct audioformat *fmt)
1212 {
1213         struct usb_device *dev = subs->dev;
1214         struct usb_host_interface *alts;
1215         struct usb_interface_descriptor *altsd;
1216         struct usb_interface *iface;
1217         unsigned int ep, attr;
1218         int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK;
1219         int err;
1220
1221         iface = usb_ifnum_to_if(dev, fmt->iface);
1222         snd_assert(iface, return -EINVAL);
1223         alts = &iface->altsetting[fmt->altset_idx];
1224         altsd = get_iface_desc(alts);
1225         snd_assert(altsd->bAlternateSetting == fmt->altsetting, return -EINVAL);
1226
1227         if (fmt == subs->cur_audiofmt)
1228                 return 0;
1229
1230         /* close the old interface */
1231         if (subs->interface >= 0 && subs->interface != fmt->iface) {
1232                 usb_set_interface(subs->dev, subs->interface, 0);
1233                 subs->interface = -1;
1234                 subs->format = 0;
1235         }
1236
1237         /* set interface */
1238         if (subs->interface != fmt->iface || subs->format != fmt->altset_idx) {
1239                 if (usb_set_interface(dev, fmt->iface, fmt->altsetting) < 0) {
1240                         snd_printk(KERN_ERR "%d:%d:%d: usb_set_interface failed\n",
1241                                    dev->devnum, fmt->iface, fmt->altsetting);
1242                         return -EIO;
1243                 }
1244                 snd_printdd(KERN_INFO "setting usb interface %d:%d\n", fmt->iface, fmt->altsetting);
1245                 subs->interface = fmt->iface;
1246                 subs->format = fmt->altset_idx;
1247         }
1248
1249         /* create a data pipe */
1250         ep = fmt->endpoint & USB_ENDPOINT_NUMBER_MASK;
1251         if (is_playback)
1252                 subs->datapipe = usb_sndisocpipe(dev, ep);
1253         else
1254                 subs->datapipe = usb_rcvisocpipe(dev, ep);
1255         if (snd_usb_get_speed(subs->dev) == USB_SPEED_HIGH &&
1256             get_endpoint(alts, 0)->bInterval >= 1 &&
1257             get_endpoint(alts, 0)->bInterval <= 4)
1258                 subs->datainterval = get_endpoint(alts, 0)->bInterval - 1;
1259         else
1260                 subs->datainterval = 0;
1261         subs->syncpipe = subs->syncinterval = 0;
1262         subs->maxpacksize = fmt->maxpacksize;
1263         subs->fill_max = 0;
1264
1265         /* we need a sync pipe in async OUT or adaptive IN mode */
1266         /* check the number of EP, since some devices have broken
1267          * descriptors which fool us.  if it has only one EP,
1268          * assume it as adaptive-out or sync-in.
1269          */
1270         attr = fmt->ep_attr & EP_ATTR_MASK;
1271         if (((is_playback && attr == EP_ATTR_ASYNC) ||
1272              (! is_playback && attr == EP_ATTR_ADAPTIVE)) &&
1273             altsd->bNumEndpoints >= 2) {
1274                 /* check sync-pipe endpoint */
1275                 /* ... and check descriptor size before accessing bSynchAddress
1276                    because there is a version of the SB Audigy 2 NX firmware lacking
1277                    the audio fields in the endpoint descriptors */
1278                 if ((get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != 0x01 ||
1279                     (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
1280                      get_endpoint(alts, 1)->bSynchAddress != 0)) {
1281                         snd_printk(KERN_ERR "%d:%d:%d : invalid synch pipe\n",
1282                                    dev->devnum, fmt->iface, fmt->altsetting);
1283                         return -EINVAL;
1284                 }
1285                 ep = get_endpoint(alts, 1)->bEndpointAddress;
1286                 if (get_endpoint(alts, 0)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
1287                     (( is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress | USB_DIR_IN)) ||
1288                      (!is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress & ~USB_DIR_IN)))) {
1289                         snd_printk(KERN_ERR "%d:%d:%d : invalid synch pipe\n",
1290                                    dev->devnum, fmt->iface, fmt->altsetting);
1291                         return -EINVAL;
1292                 }
1293                 ep &= USB_ENDPOINT_NUMBER_MASK;
1294                 if (is_playback)
1295                         subs->syncpipe = usb_rcvisocpipe(dev, ep);
1296                 else
1297                         subs->syncpipe = usb_sndisocpipe(dev, ep);
1298                 if (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
1299                     get_endpoint(alts, 1)->bRefresh >= 1 &&
1300                     get_endpoint(alts, 1)->bRefresh <= 9)
1301                         subs->syncinterval = get_endpoint(alts, 1)->bRefresh;
1302                 else if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
1303                         subs->syncinterval = 1;
1304                 else if (get_endpoint(alts, 1)->bInterval >= 1 &&
1305                          get_endpoint(alts, 1)->bInterval <= 16)
1306                         subs->syncinterval = get_endpoint(alts, 1)->bInterval - 1;
1307                 else
1308                         subs->syncinterval = 3;
1309         }
1310
1311         /* always fill max packet size */
1312         if (fmt->attributes & EP_CS_ATTR_FILL_MAX)
1313                 subs->fill_max = 1;
1314
1315         if ((err = init_usb_pitch(dev, subs->interface, alts, fmt)) < 0)
1316                 return err;
1317
1318         subs->cur_audiofmt = fmt;
1319
1320 #if 0
1321         printk("setting done: format = %d, rate = %d, channels = %d\n",
1322                fmt->format, fmt->rate, fmt->channels);
1323         printk("  datapipe = 0x%0x, syncpipe = 0x%0x\n",
1324                subs->datapipe, subs->syncpipe);
1325 #endif
1326
1327         return 0;
1328 }
1329
1330 /*
1331  * hw_params callback
1332  *
1333  * allocate a buffer and set the given audio format.
1334  *
1335  * so far we use a physically linear buffer although packetize transfer
1336  * doesn't need a continuous area.
1337  * if sg buffer is supported on the later version of alsa, we'll follow
1338  * that.
1339  */
1340 static int snd_usb_hw_params(snd_pcm_substream_t *substream,
1341                              snd_pcm_hw_params_t *hw_params)
1342 {
1343         snd_usb_substream_t *subs = (snd_usb_substream_t *)substream->runtime->private_data;
1344         struct audioformat *fmt;
1345         unsigned int channels, rate, format;
1346         int ret, changed;
1347
1348         ret = snd_pcm_alloc_vmalloc_buffer(substream,
1349                                            params_buffer_bytes(hw_params));
1350         if (ret < 0)
1351                 return ret;
1352
1353         format = params_format(hw_params);
1354         rate = params_rate(hw_params);
1355         channels = params_channels(hw_params);
1356         fmt = find_format(subs, format, rate, channels);
1357         if (! fmt) {
1358                 snd_printd(KERN_DEBUG "cannot set format: format = %s, rate = %d, channels = %d\n",
1359                            snd_pcm_format_name(format), rate, channels);
1360                 return -EINVAL;
1361         }
1362
1363         changed = subs->cur_audiofmt != fmt ||
1364                 subs->period_bytes != params_period_bytes(hw_params) ||
1365                 subs->cur_rate != rate;
1366         if ((ret = set_format(subs, fmt)) < 0)
1367                 return ret;
1368
1369         if (subs->cur_rate != rate) {
1370                 struct usb_host_interface *alts;
1371                 struct usb_interface *iface;
1372                 iface = usb_ifnum_to_if(subs->dev, fmt->iface);
1373                 alts = &iface->altsetting[fmt->altset_idx];
1374                 ret = init_usb_sample_rate(subs->dev, subs->interface, alts, fmt, rate);
1375                 if (ret < 0)
1376                         return ret;
1377                 subs->cur_rate = rate;
1378         }
1379
1380         if (changed) {
1381                 /* format changed */
1382                 release_substream_urbs(subs, 0);
1383                 /* influenced: period_bytes, channels, rate, format, */
1384                 ret = init_substream_urbs(subs, params_period_bytes(hw_params),
1385                                           params_rate(hw_params),
1386                                           snd_pcm_format_physical_width(params_format(hw_params)) * params_channels(hw_params));
1387         }
1388
1389         return ret;
1390 }
1391
1392 /*
1393  * hw_free callback
1394  *
1395  * reset the audio format and release the buffer
1396  */
1397 static int snd_usb_hw_free(snd_pcm_substream_t *substream)
1398 {
1399         snd_usb_substream_t *subs = (snd_usb_substream_t *)substream->runtime->private_data;
1400
1401         subs->cur_audiofmt = NULL;
1402         subs->cur_rate = 0;
1403         subs->period_bytes = 0;
1404         release_substream_urbs(subs, 0);
1405         return snd_pcm_free_vmalloc_buffer(substream);
1406 }
1407
1408 /*
1409  * prepare callback
1410  *
1411  * only a few subtle things...
1412  */
1413 static int snd_usb_pcm_prepare(snd_pcm_substream_t *substream)
1414 {
1415         snd_pcm_runtime_t *runtime = substream->runtime;
1416         snd_usb_substream_t *subs = (snd_usb_substream_t *)runtime->private_data;
1417
1418         if (! subs->cur_audiofmt) {
1419                 snd_printk(KERN_ERR "usbaudio: no format is specified!\n");
1420                 return -ENXIO;
1421         }
1422
1423         /* some unit conversions in runtime */
1424         subs->maxframesize = bytes_to_frames(runtime, subs->maxpacksize);
1425         subs->curframesize = bytes_to_frames(runtime, subs->curpacksize);
1426
1427         /* reset the pointer */
1428         subs->hwptr_done = 0;
1429         subs->transfer_done = 0;
1430         subs->phase = 0;
1431
1432         /* clear urbs (to be sure) */
1433         deactivate_urbs(subs, 0, 1);
1434         wait_clear_urbs(subs);
1435
1436         return 0;
1437 }
1438
1439 static snd_pcm_hardware_t snd_usb_playback =
1440 {
1441         .info =                 SNDRV_PCM_INFO_MMAP |
1442                                 SNDRV_PCM_INFO_MMAP_VALID |
1443                                 SNDRV_PCM_INFO_BATCH |
1444                                 SNDRV_PCM_INFO_INTERLEAVED |
1445                                 SNDRV_PCM_INFO_BLOCK_TRANSFER,
1446         .buffer_bytes_max =     1024 * 1024,
1447         .period_bytes_min =     64,
1448         .period_bytes_max =     512 * 1024,
1449         .periods_min =          2,
1450         .periods_max =          1024,
1451 };
1452
1453 static snd_pcm_hardware_t snd_usb_capture =
1454 {
1455         .info =                 SNDRV_PCM_INFO_MMAP |
1456                                 SNDRV_PCM_INFO_MMAP_VALID |
1457                                 SNDRV_PCM_INFO_BATCH |
1458                                 SNDRV_PCM_INFO_INTERLEAVED |
1459                                 SNDRV_PCM_INFO_BLOCK_TRANSFER,
1460         .buffer_bytes_max =     1024 * 1024,
1461         .period_bytes_min =     64,
1462         .period_bytes_max =     512 * 1024,
1463         .periods_min =          2,
1464         .periods_max =          1024,
1465 };
1466
1467 /*
1468  * h/w constraints
1469  */
1470
1471 #ifdef HW_CONST_DEBUG
1472 #define hwc_debug(fmt, args...) printk(KERN_DEBUG fmt, ##args)
1473 #else
1474 #define hwc_debug(fmt, args...) /**/
1475 #endif
1476
1477 static int hw_check_valid_format(snd_pcm_hw_params_t *params, struct audioformat *fp)
1478 {
1479         snd_interval_t *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
1480         snd_interval_t *ct = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
1481         snd_mask_t *fmts = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1482
1483         /* check the format */
1484         if (! snd_mask_test(fmts, fp->format)) {
1485                 hwc_debug("   > check: no supported format %d\n", fp->format);
1486                 return 0;
1487         }
1488         /* check the channels */
1489         if (fp->channels < ct->min || fp->channels > ct->max) {
1490                 hwc_debug("   > check: no valid channels %d (%d/%d)\n", fp->channels, ct->min, ct->max);
1491                 return 0;
1492         }
1493         /* check the rate is within the range */
1494         if (fp->rate_min > it->max || (fp->rate_min == it->max && it->openmax)) {
1495                 hwc_debug("   > check: rate_min %d > max %d\n", fp->rate_min, it->max);
1496                 return 0;
1497         }
1498         if (fp->rate_max < it->min || (fp->rate_max == it->min && it->openmin)) {
1499                 hwc_debug("   > check: rate_max %d < min %d\n", fp->rate_max, it->min);
1500                 return 0;
1501         }
1502         return 1;
1503 }
1504
1505 static int hw_rule_rate(snd_pcm_hw_params_t *params,
1506                         snd_pcm_hw_rule_t *rule)
1507 {
1508         snd_usb_substream_t *subs = rule->private;
1509         struct list_head *p;
1510         snd_interval_t *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
1511         unsigned int rmin, rmax;
1512         int changed;
1513
1514         hwc_debug("hw_rule_rate: (%d,%d)\n", it->min, it->max);
1515         changed = 0;
1516         rmin = rmax = 0;
1517         list_for_each(p, &subs->fmt_list) {
1518                 struct audioformat *fp;
1519                 fp = list_entry(p, struct audioformat, list);
1520                 if (! hw_check_valid_format(params, fp))
1521                         continue;
1522                 if (changed++) {
1523                         if (rmin > fp->rate_min)
1524                                 rmin = fp->rate_min;
1525                         if (rmax < fp->rate_max)
1526                                 rmax = fp->rate_max;
1527                 } else {
1528                         rmin = fp->rate_min;
1529                         rmax = fp->rate_max;
1530                 }
1531         }
1532
1533         if (! changed) {
1534                 hwc_debug("  --> get empty\n");
1535                 it->empty = 1;
1536                 return -EINVAL;
1537         }
1538
1539         changed = 0;
1540         if (it->min < rmin) {
1541                 it->min = rmin;
1542                 it->openmin = 0;
1543                 changed = 1;
1544         }
1545         if (it->max > rmax) {
1546                 it->max = rmax;
1547                 it->openmax = 0;
1548                 changed = 1;
1549         }
1550         if (snd_interval_checkempty(it)) {
1551                 it->empty = 1;
1552                 return -EINVAL;
1553         }
1554         hwc_debug("  --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
1555         return changed;
1556 }
1557
1558
1559 static int hw_rule_channels(snd_pcm_hw_params_t *params,
1560                             snd_pcm_hw_rule_t *rule)
1561 {
1562         snd_usb_substream_t *subs = rule->private;
1563         struct list_head *p;
1564         snd_interval_t *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
1565         unsigned int rmin, rmax;
1566         int changed;
1567
1568         hwc_debug("hw_rule_channels: (%d,%d)\n", it->min, it->max);
1569         changed = 0;
1570         rmin = rmax = 0;
1571         list_for_each(p, &subs->fmt_list) {
1572                 struct audioformat *fp;
1573                 fp = list_entry(p, struct audioformat, list);
1574                 if (! hw_check_valid_format(params, fp))
1575                         continue;
1576                 if (changed++) {
1577                         if (rmin > fp->channels)
1578                                 rmin = fp->channels;
1579                         if (rmax < fp->channels)
1580                                 rmax = fp->channels;
1581                 } else {
1582                         rmin = fp->channels;
1583                         rmax = fp->channels;
1584                 }
1585         }
1586
1587         if (! changed) {
1588                 hwc_debug("  --> get empty\n");
1589                 it->empty = 1;
1590                 return -EINVAL;
1591         }
1592
1593         changed = 0;
1594         if (it->min < rmin) {
1595                 it->min = rmin;
1596                 it->openmin = 0;
1597                 changed = 1;
1598         }
1599         if (it->max > rmax) {
1600                 it->max = rmax;
1601                 it->openmax = 0;
1602                 changed = 1;
1603         }
1604         if (snd_interval_checkempty(it)) {
1605                 it->empty = 1;
1606                 return -EINVAL;
1607         }
1608         hwc_debug("  --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
1609         return changed;
1610 }
1611
1612 static int hw_rule_format(snd_pcm_hw_params_t *params,
1613                           snd_pcm_hw_rule_t *rule)
1614 {
1615         snd_usb_substream_t *subs = rule->private;
1616         struct list_head *p;
1617         snd_mask_t *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1618         u64 fbits;
1619         u32 oldbits[2];
1620         int changed;
1621
1622         hwc_debug("hw_rule_format: %x:%x\n", fmt->bits[0], fmt->bits[1]);
1623         fbits = 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                 fbits |= (1ULL << fp->format);
1630         }
1631
1632         oldbits[0] = fmt->bits[0];
1633         oldbits[1] = fmt->bits[1];
1634         fmt->bits[0] &= (u32)fbits;
1635         fmt->bits[1] &= (u32)(fbits >> 32);
1636         if (! fmt->bits[0] && ! fmt->bits[1]) {
1637                 hwc_debug("  --> get empty\n");
1638                 return -EINVAL;
1639         }
1640         changed = (oldbits[0] != fmt->bits[0] || oldbits[1] != fmt->bits[1]);
1641         hwc_debug("  --> %x:%x (changed = %d)\n", fmt->bits[0], fmt->bits[1], changed);
1642         return changed;
1643 }
1644
1645 #define MAX_MASK        64
1646
1647 /*
1648  * check whether the registered audio formats need special hw-constraints
1649  */
1650 static int check_hw_params_convention(snd_usb_substream_t *subs)
1651 {
1652         int i;
1653         u32 *channels;
1654         u32 *rates;
1655         u32 cmaster, rmaster;
1656         u32 rate_min = 0, rate_max = 0;
1657         struct list_head *p;
1658         int err = 1;
1659
1660         channels = kcalloc(MAX_MASK, sizeof(u32), GFP_KERNEL);
1661         rates = kcalloc(MAX_MASK, sizeof(u32), GFP_KERNEL);
1662
1663         list_for_each(p, &subs->fmt_list) {
1664                 struct audioformat *f;
1665                 f = list_entry(p, struct audioformat, list);
1666                 /* unconventional channels? */
1667                 if (f->channels > 32)
1668                         goto __out;
1669                 /* continuous rate min/max matches? */
1670                 if (f->rates & SNDRV_PCM_RATE_CONTINUOUS) {
1671                         if (rate_min && f->rate_min != rate_min)
1672                                 goto __out;
1673                         if (rate_max && f->rate_max != rate_max)
1674                                 goto __out;
1675                         rate_min = f->rate_min;
1676                         rate_max = f->rate_max;
1677                 }
1678                 /* combination of continuous rates and fixed rates? */
1679                 if (rates[f->format] & SNDRV_PCM_RATE_CONTINUOUS) {
1680                         if (f->rates != rates[f->format])
1681                                 goto __out;
1682                 }
1683                 if (f->rates & SNDRV_PCM_RATE_CONTINUOUS) {
1684                         if (rates[f->format] && rates[f->format] != f->rates)
1685                                 goto __out;
1686                 }
1687                 channels[f->format] |= (1 << f->channels);
1688                 rates[f->format] |= f->rates;
1689         }
1690         /* check whether channels and rates match for all formats */
1691         cmaster = rmaster = 0;
1692         for (i = 0; i < MAX_MASK; i++) {
1693                 if (cmaster != channels[i] && cmaster && channels[i])
1694                         goto __out;
1695                 if (rmaster != rates[i] && rmaster && rates[i])
1696                         goto __out;
1697                 if (channels[i])
1698                         cmaster = channels[i];
1699                 if (rates[i])
1700                         rmaster = rates[i];
1701         }
1702         /* check whether channels match for all distinct rates */
1703         memset(channels, 0, MAX_MASK * sizeof(u32));
1704         list_for_each(p, &subs->fmt_list) {
1705                 struct audioformat *f;
1706                 f = list_entry(p, struct audioformat, list);
1707                 if (f->rates & SNDRV_PCM_RATE_CONTINUOUS)
1708                         continue;
1709                 for (i = 0; i < 32; i++) {
1710                         if (f->rates & (1 << i))
1711                                 channels[i] |= (1 << f->channels);
1712                 }
1713         }
1714         cmaster = 0;
1715         for (i = 0; i < 32; i++) {
1716                 if (cmaster != channels[i] && cmaster && channels[i])
1717                         goto __out;
1718                 if (channels[i])
1719                         cmaster = channels[i];
1720         }
1721         err = 0;
1722
1723  __out:
1724         kfree(channels);
1725         kfree(rates);
1726         return err;
1727 }
1728
1729
1730 /*
1731  * set up the runtime hardware information.
1732  */
1733
1734 static int setup_hw_info(snd_pcm_runtime_t *runtime, snd_usb_substream_t *subs)
1735 {
1736         struct list_head *p;
1737         int err;
1738
1739         runtime->hw.formats = subs->formats;
1740
1741         runtime->hw.rate_min = 0x7fffffff;
1742         runtime->hw.rate_max = 0;
1743         runtime->hw.channels_min = 256;
1744         runtime->hw.channels_max = 0;
1745         runtime->hw.rates = 0;
1746         /* check min/max rates and channels */
1747         list_for_each(p, &subs->fmt_list) {
1748                 struct audioformat *fp;
1749                 fp = list_entry(p, struct audioformat, list);
1750                 runtime->hw.rates |= fp->rates;
1751                 if (runtime->hw.rate_min > fp->rate_min)
1752                         runtime->hw.rate_min = fp->rate_min;
1753                 if (runtime->hw.rate_max < fp->rate_max)
1754                         runtime->hw.rate_max = fp->rate_max;
1755                 if (runtime->hw.channels_min > fp->channels)
1756                         runtime->hw.channels_min = fp->channels;
1757                 if (runtime->hw.channels_max < fp->channels)
1758                         runtime->hw.channels_max = fp->channels;
1759                 if (fp->fmt_type == USB_FORMAT_TYPE_II && fp->frame_size > 0) {
1760                         /* FIXME: there might be more than one audio formats... */
1761                         runtime->hw.period_bytes_min = runtime->hw.period_bytes_max =
1762                                 fp->frame_size;
1763                 }
1764         }
1765
1766         /* set the period time minimum 1ms */
1767         snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1768                                      1000 * MIN_PACKS_URB,
1769                                      /*(nrpacks * MAX_URBS) * 1000*/ UINT_MAX);
1770
1771         if (check_hw_params_convention(subs)) {
1772                 hwc_debug("setting extra hw constraints...\n");
1773                 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1774                                                hw_rule_rate, subs,
1775                                                SNDRV_PCM_HW_PARAM_FORMAT,
1776                                                SNDRV_PCM_HW_PARAM_CHANNELS,
1777                                                -1)) < 0)
1778                         return err;
1779                 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1780                                                hw_rule_channels, subs,
1781                                                SNDRV_PCM_HW_PARAM_FORMAT,
1782                                                SNDRV_PCM_HW_PARAM_RATE,
1783                                                -1)) < 0)
1784                         return err;
1785                 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1786                                                hw_rule_format, subs,
1787                                                SNDRV_PCM_HW_PARAM_RATE,
1788                                                SNDRV_PCM_HW_PARAM_CHANNELS,
1789                                                -1)) < 0)
1790                         return err;
1791         }
1792         return 0;
1793 }
1794
1795 static int snd_usb_pcm_open(snd_pcm_substream_t *substream, int direction,
1796                             snd_pcm_hardware_t *hw)
1797 {
1798         snd_usb_stream_t *as = snd_pcm_substream_chip(substream);
1799         snd_pcm_runtime_t *runtime = substream->runtime;
1800         snd_usb_substream_t *subs = &as->substream[direction];
1801
1802         subs->interface = -1;
1803         subs->format = 0;
1804         runtime->hw = *hw;
1805         runtime->private_data = subs;
1806         subs->pcm_substream = substream;
1807         return setup_hw_info(runtime, subs);
1808 }
1809
1810 static int snd_usb_pcm_close(snd_pcm_substream_t *substream, int direction)
1811 {
1812         snd_usb_stream_t *as = snd_pcm_substream_chip(substream);
1813         snd_usb_substream_t *subs = &as->substream[direction];
1814
1815         if (subs->interface >= 0) {
1816                 usb_set_interface(subs->dev, subs->interface, 0);
1817                 subs->interface = -1;
1818         }
1819         subs->pcm_substream = NULL;
1820         return 0;
1821 }
1822
1823 static int snd_usb_playback_open(snd_pcm_substream_t *substream)
1824 {
1825         return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_PLAYBACK, &snd_usb_playback);
1826 }
1827
1828 static int snd_usb_playback_close(snd_pcm_substream_t *substream)
1829 {
1830         return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_PLAYBACK);
1831 }
1832
1833 static int snd_usb_capture_open(snd_pcm_substream_t *substream)
1834 {
1835         return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_CAPTURE, &snd_usb_capture);
1836 }
1837
1838 static int snd_usb_capture_close(snd_pcm_substream_t *substream)
1839 {
1840         return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_CAPTURE);
1841 }
1842
1843 static snd_pcm_ops_t snd_usb_playback_ops = {
1844         .open =         snd_usb_playback_open,
1845         .close =        snd_usb_playback_close,
1846         .ioctl =        snd_pcm_lib_ioctl,
1847         .hw_params =    snd_usb_hw_params,
1848         .hw_free =      snd_usb_hw_free,
1849         .prepare =      snd_usb_pcm_prepare,
1850         .trigger =      snd_usb_pcm_trigger,
1851         .pointer =      snd_usb_pcm_pointer,
1852         .page =         snd_pcm_get_vmalloc_page,
1853 };
1854
1855 static snd_pcm_ops_t snd_usb_capture_ops = {
1856         .open =         snd_usb_capture_open,
1857         .close =        snd_usb_capture_close,
1858         .ioctl =        snd_pcm_lib_ioctl,
1859         .hw_params =    snd_usb_hw_params,
1860         .hw_free =      snd_usb_hw_free,
1861         .prepare =      snd_usb_pcm_prepare,
1862         .trigger =      snd_usb_pcm_trigger,
1863         .pointer =      snd_usb_pcm_pointer,
1864         .page =         snd_pcm_get_vmalloc_page,
1865 };
1866
1867
1868
1869 /*
1870  * helper functions
1871  */
1872
1873 /*
1874  * combine bytes and get an integer value
1875  */
1876 unsigned int snd_usb_combine_bytes(unsigned char *bytes, int size)
1877 {
1878         switch (size) {
1879         case 1:  return *bytes;
1880         case 2:  return combine_word(bytes);
1881         case 3:  return combine_triple(bytes);
1882         case 4:  return combine_quad(bytes);
1883         default: return 0;
1884         }
1885 }
1886
1887 /*
1888  * parse descriptor buffer and return the pointer starting the given
1889  * descriptor type.
1890  */
1891 void *snd_usb_find_desc(void *descstart, int desclen, void *after, u8 dtype)
1892 {
1893         u8 *p, *end, *next;
1894
1895         p = descstart;
1896         end = p + desclen;
1897         for (; p < end;) {
1898                 if (p[0] < 2)
1899                         return NULL;
1900                 next = p + p[0];
1901                 if (next > end)
1902                         return NULL;
1903                 if (p[1] == dtype && (!after || (void *)p > after)) {
1904                         return p;
1905                 }
1906                 p = next;
1907         }
1908         return NULL;
1909 }
1910
1911 /*
1912  * find a class-specified interface descriptor with the given subtype.
1913  */
1914 void *snd_usb_find_csint_desc(void *buffer, int buflen, void *after, u8 dsubtype)
1915 {
1916         unsigned char *p = after;
1917
1918         while ((p = snd_usb_find_desc(buffer, buflen, p,
1919                                       USB_DT_CS_INTERFACE)) != NULL) {
1920                 if (p[0] >= 3 && p[2] == dsubtype)
1921                         return p;
1922         }
1923         return NULL;
1924 }
1925
1926 /*
1927  * Wrapper for usb_control_msg().
1928  * Allocates a temp buffer to prevent dmaing from/to the stack.
1929  */
1930 int snd_usb_ctl_msg(struct usb_device *dev, unsigned int pipe, __u8 request,
1931                     __u8 requesttype, __u16 value, __u16 index, void *data,
1932                     __u16 size, int timeout)
1933 {
1934         int err;
1935         void *buf = NULL;
1936
1937         if (size > 0) {
1938                 buf = kmalloc(size, GFP_KERNEL);
1939                 if (!buf)
1940                         return -ENOMEM;
1941                 memcpy(buf, data, size);
1942         }
1943         err = usb_control_msg(dev, pipe, request, requesttype,
1944                               value, index, buf, size, timeout);
1945         if (size > 0) {
1946                 memcpy(data, buf, size);
1947                 kfree(buf);
1948         }
1949         return err;
1950 }
1951
1952
1953 /*
1954  * entry point for linux usb interface
1955  */
1956
1957 static int usb_audio_probe(struct usb_interface *intf,
1958                            const struct usb_device_id *id);
1959 static void usb_audio_disconnect(struct usb_interface *intf);
1960
1961 static struct usb_device_id usb_audio_ids [] = {
1962 #include "usbquirks.h"
1963     { .match_flags = (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS),
1964       .bInterfaceClass = USB_CLASS_AUDIO,
1965       .bInterfaceSubClass = USB_SUBCLASS_AUDIO_CONTROL },
1966     { }                                         /* Terminating entry */
1967 };
1968
1969 MODULE_DEVICE_TABLE (usb, usb_audio_ids);
1970
1971 static struct usb_driver usb_audio_driver = {
1972         .owner =        THIS_MODULE,
1973         .name =         "snd-usb-audio",
1974         .probe =        usb_audio_probe,
1975         .disconnect =   usb_audio_disconnect,
1976         .id_table =     usb_audio_ids,
1977 };
1978
1979
1980 /*
1981  * proc interface for list the supported pcm formats
1982  */
1983 static void proc_dump_substream_formats(snd_usb_substream_t *subs, snd_info_buffer_t *buffer)
1984 {
1985         struct list_head *p;
1986         static char *sync_types[4] = {
1987                 "NONE", "ASYNC", "ADAPTIVE", "SYNC"
1988         };
1989
1990         list_for_each(p, &subs->fmt_list) {
1991                 struct audioformat *fp;
1992                 fp = list_entry(p, struct audioformat, list);
1993                 snd_iprintf(buffer, "  Interface %d\n", fp->iface);
1994                 snd_iprintf(buffer, "    Altset %d\n", fp->altsetting);
1995                 snd_iprintf(buffer, "    Format: %s\n", snd_pcm_format_name(fp->format));
1996                 snd_iprintf(buffer, "    Channels: %d\n", fp->channels);
1997                 snd_iprintf(buffer, "    Endpoint: %d %s (%s)\n",
1998                             fp->endpoint & USB_ENDPOINT_NUMBER_MASK,
1999                             fp->endpoint & USB_DIR_IN ? "IN" : "OUT",
2000                             sync_types[(fp->ep_attr & EP_ATTR_MASK) >> 2]);
2001                 if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS) {
2002                         snd_iprintf(buffer, "    Rates: %d - %d (continuous)\n",
2003                                     fp->rate_min, fp->rate_max);
2004                 } else {
2005                         unsigned int i;
2006                         snd_iprintf(buffer, "    Rates: ");
2007                         for (i = 0; i < fp->nr_rates; i++) {
2008                                 if (i > 0)
2009                                         snd_iprintf(buffer, ", ");
2010                                 snd_iprintf(buffer, "%d", fp->rate_table[i]);
2011                         }
2012                         snd_iprintf(buffer, "\n");
2013                 }
2014                 // snd_iprintf(buffer, "    Max Packet Size = %d\n", fp->maxpacksize);
2015                 // snd_iprintf(buffer, "    EP Attribute = 0x%x\n", fp->attributes);
2016         }
2017 }
2018
2019 static void proc_dump_substream_status(snd_usb_substream_t *subs, snd_info_buffer_t *buffer)
2020 {
2021         if (subs->running) {
2022                 unsigned int i;
2023                 snd_iprintf(buffer, "  Status: Running\n");
2024                 snd_iprintf(buffer, "    Interface = %d\n", subs->interface);
2025                 snd_iprintf(buffer, "    Altset = %d\n", subs->format);
2026                 snd_iprintf(buffer, "    URBs = %d [ ", subs->nurbs);
2027                 for (i = 0; i < subs->nurbs; i++)
2028                         snd_iprintf(buffer, "%d ", subs->dataurb[i].packets);
2029                 snd_iprintf(buffer, "]\n");
2030                 snd_iprintf(buffer, "    Packet Size = %d\n", subs->curpacksize);
2031                 snd_iprintf(buffer, "    Momentary freq = %u Hz (%#x.%04x)\n",
2032                             snd_usb_get_speed(subs->dev) == USB_SPEED_FULL
2033                             ? get_full_speed_hz(subs->freqm)
2034                             : get_high_speed_hz(subs->freqm),
2035                             subs->freqm >> 16, subs->freqm & 0xffff);
2036         } else {
2037                 snd_iprintf(buffer, "  Status: Stop\n");
2038         }
2039 }
2040
2041 static void proc_pcm_format_read(snd_info_entry_t *entry, snd_info_buffer_t *buffer)
2042 {
2043         snd_usb_stream_t *stream = entry->private_data;
2044
2045         snd_iprintf(buffer, "%s : %s\n", stream->chip->card->longname, stream->pcm->name);
2046
2047         if (stream->substream[SNDRV_PCM_STREAM_PLAYBACK].num_formats) {
2048                 snd_iprintf(buffer, "\nPlayback:\n");
2049                 proc_dump_substream_status(&stream->substream[SNDRV_PCM_STREAM_PLAYBACK], buffer);
2050                 proc_dump_substream_formats(&stream->substream[SNDRV_PCM_STREAM_PLAYBACK], buffer);
2051         }
2052         if (stream->substream[SNDRV_PCM_STREAM_CAPTURE].num_formats) {
2053                 snd_iprintf(buffer, "\nCapture:\n");
2054                 proc_dump_substream_status(&stream->substream[SNDRV_PCM_STREAM_CAPTURE], buffer);
2055                 proc_dump_substream_formats(&stream->substream[SNDRV_PCM_STREAM_CAPTURE], buffer);
2056         }
2057 }
2058
2059 static void proc_pcm_format_add(snd_usb_stream_t *stream)
2060 {
2061         snd_info_entry_t *entry;
2062         char name[32];
2063         snd_card_t *card = stream->chip->card;
2064
2065         sprintf(name, "stream%d", stream->pcm_index);
2066         if (! snd_card_proc_new(card, name, &entry))
2067                 snd_info_set_text_ops(entry, stream, 1024, proc_pcm_format_read);
2068 }
2069
2070
2071 /*
2072  * initialize the substream instance.
2073  */
2074
2075 static void init_substream(snd_usb_stream_t *as, int stream, struct audioformat *fp)
2076 {
2077         snd_usb_substream_t *subs = &as->substream[stream];
2078
2079         INIT_LIST_HEAD(&subs->fmt_list);
2080         spin_lock_init(&subs->lock);
2081         if (stream == SNDRV_PCM_STREAM_PLAYBACK)
2082                 tasklet_init(&subs->start_period_elapsed, start_period_elapsed,
2083                              (unsigned long)subs);
2084
2085         subs->stream = as;
2086         subs->direction = stream;
2087         subs->dev = as->chip->dev;
2088         if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
2089                 subs->ops = audio_urb_ops[stream];
2090         else
2091                 subs->ops = audio_urb_ops_high_speed[stream];
2092         snd_pcm_set_ops(as->pcm, stream,
2093                         stream == SNDRV_PCM_STREAM_PLAYBACK ?
2094                         &snd_usb_playback_ops : &snd_usb_capture_ops);
2095
2096         list_add_tail(&fp->list, &subs->fmt_list);
2097         subs->formats |= 1ULL << fp->format;
2098         subs->endpoint = fp->endpoint;
2099         subs->num_formats++;
2100         subs->fmt_type = fp->fmt_type;
2101 }
2102
2103
2104 /*
2105  * free a substream
2106  */
2107 static void free_substream(snd_usb_substream_t *subs)
2108 {
2109         struct list_head *p, *n;
2110
2111         if (! subs->num_formats)
2112                 return; /* not initialized */
2113         list_for_each_safe(p, n, &subs->fmt_list) {
2114                 struct audioformat *fp = list_entry(p, struct audioformat, list);
2115                 kfree(fp->rate_table);
2116                 kfree(fp);
2117         }
2118 }
2119
2120
2121 /*
2122  * free a usb stream instance
2123  */
2124 static void snd_usb_audio_stream_free(snd_usb_stream_t *stream)
2125 {
2126         free_substream(&stream->substream[0]);
2127         free_substream(&stream->substream[1]);
2128         list_del(&stream->list);
2129         kfree(stream);
2130 }
2131
2132 static void snd_usb_audio_pcm_free(snd_pcm_t *pcm)
2133 {
2134         snd_usb_stream_t *stream = pcm->private_data;
2135         if (stream) {
2136                 stream->pcm = NULL;
2137                 snd_usb_audio_stream_free(stream);
2138         }
2139 }
2140
2141
2142 /*
2143  * add this endpoint to the chip instance.
2144  * if a stream with the same endpoint already exists, append to it.
2145  * if not, create a new pcm stream.
2146  */
2147 static int add_audio_endpoint(snd_usb_audio_t *chip, int stream, struct audioformat *fp)
2148 {
2149         struct list_head *p;
2150         snd_usb_stream_t *as;
2151         snd_usb_substream_t *subs;
2152         snd_pcm_t *pcm;
2153         int err;
2154
2155         list_for_each(p, &chip->pcm_list) {
2156                 as = list_entry(p, snd_usb_stream_t, list);
2157                 if (as->fmt_type != fp->fmt_type)
2158                         continue;
2159                 subs = &as->substream[stream];
2160                 if (! subs->endpoint)
2161                         continue;
2162                 if (subs->endpoint == fp->endpoint) {
2163                         list_add_tail(&fp->list, &subs->fmt_list);
2164                         subs->num_formats++;
2165                         subs->formats |= 1ULL << fp->format;
2166                         return 0;
2167                 }
2168         }
2169         /* look for an empty stream */
2170         list_for_each(p, &chip->pcm_list) {
2171                 as = list_entry(p, snd_usb_stream_t, list);
2172                 if (as->fmt_type != fp->fmt_type)
2173                         continue;
2174                 subs = &as->substream[stream];
2175                 if (subs->endpoint)
2176                         continue;
2177                 err = snd_pcm_new_stream(as->pcm, stream, 1);
2178                 if (err < 0)
2179                         return err;
2180                 init_substream(as, stream, fp);
2181                 return 0;
2182         }
2183
2184         /* create a new pcm */
2185         as = kmalloc(sizeof(*as), GFP_KERNEL);
2186         if (! as)
2187                 return -ENOMEM;
2188         memset(as, 0, sizeof(*as));
2189         as->pcm_index = chip->pcm_devs;
2190         as->chip = chip;
2191         as->fmt_type = fp->fmt_type;
2192         err = snd_pcm_new(chip->card, "USB Audio", chip->pcm_devs,
2193                           stream == SNDRV_PCM_STREAM_PLAYBACK ? 1 : 0,
2194                           stream == SNDRV_PCM_STREAM_PLAYBACK ? 0 : 1,
2195                           &pcm);
2196         if (err < 0) {
2197                 kfree(as);
2198                 return err;
2199         }
2200         as->pcm = pcm;
2201         pcm->private_data = as;
2202         pcm->private_free = snd_usb_audio_pcm_free;
2203         pcm->info_flags = 0;
2204         if (chip->pcm_devs > 0)
2205                 sprintf(pcm->name, "USB Audio #%d", chip->pcm_devs);
2206         else
2207                 strcpy(pcm->name, "USB Audio");
2208
2209         init_substream(as, stream, fp);
2210
2211         list_add(&as->list, &chip->pcm_list);
2212         chip->pcm_devs++;
2213
2214         proc_pcm_format_add(as);
2215
2216         return 0;
2217 }
2218
2219
2220 /*
2221  * check if the device uses big-endian samples
2222  */
2223 static int is_big_endian_format(snd_usb_audio_t *chip, struct audioformat *fp)
2224 {
2225         switch (chip->usb_id) {
2226         case USB_ID(0x0763, 0x2001): /* M-Audio Quattro: captured data only */
2227                 if (fp->endpoint & USB_DIR_IN)
2228                         return 1;
2229                 break;
2230         case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
2231                 return 1;
2232         }
2233         return 0;
2234 }
2235
2236 /*
2237  * parse the audio format type I descriptor
2238  * and returns the corresponding pcm format
2239  *
2240  * @dev: usb device
2241  * @fp: audioformat record
2242  * @format: the format tag (wFormatTag)
2243  * @fmt: the format type descriptor
2244  */
2245 static int parse_audio_format_i_type(snd_usb_audio_t *chip, struct audioformat *fp,
2246                                      int format, unsigned char *fmt)
2247 {
2248         int pcm_format;
2249         int sample_width, sample_bytes;
2250
2251         /* FIXME: correct endianess and sign? */
2252         pcm_format = -1;
2253         sample_width = fmt[6];
2254         sample_bytes = fmt[5];
2255         switch (format) {
2256         case 0: /* some devices don't define this correctly... */
2257                 snd_printdd(KERN_INFO "%d:%u:%d : format type 0 is detected, processed as PCM\n",
2258                             chip->dev->devnum, fp->iface, fp->altsetting);
2259                 /* fall-through */
2260         case USB_AUDIO_FORMAT_PCM:
2261                 if (sample_width > sample_bytes * 8) {
2262                         snd_printk(KERN_INFO "%d:%u:%d : sample bitwidth %d in over sample bytes %d\n",
2263                                    chip->dev->devnum, fp->iface, fp->altsetting,
2264                                    sample_width, sample_bytes);
2265                 }
2266                 /* check the format byte size */
2267                 switch (fmt[5]) {
2268                 case 1:
2269                         pcm_format = SNDRV_PCM_FORMAT_S8;
2270                         break;
2271                 case 2:
2272                         if (is_big_endian_format(chip, fp))
2273                                 pcm_format = SNDRV_PCM_FORMAT_S16_BE; /* grrr, big endian!! */
2274                         else
2275                                 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
2276                         break;
2277                 case 3:
2278                         if (is_big_endian_format(chip, fp))
2279                                 pcm_format = SNDRV_PCM_FORMAT_S24_3BE; /* grrr, big endian!! */
2280                         else
2281                                 pcm_format = SNDRV_PCM_FORMAT_S24_3LE;
2282                         break;
2283                 case 4:
2284                         pcm_format = SNDRV_PCM_FORMAT_S32_LE;
2285                         break;
2286                 default:
2287                         snd_printk(KERN_INFO "%d:%u:%d : unsupported sample bitwidth %d in %d bytes\n",
2288                                    chip->dev->devnum, fp->iface,
2289                                    fp->altsetting, sample_width, sample_bytes);
2290                         break;
2291                 }
2292                 break;
2293         case USB_AUDIO_FORMAT_PCM8:
2294                 /* Dallas DS4201 workaround */
2295                 if (chip->usb_id == USB_ID(0x04fa, 0x4201))
2296                         pcm_format = SNDRV_PCM_FORMAT_S8;
2297                 else
2298                         pcm_format = SNDRV_PCM_FORMAT_U8;
2299                 break;
2300         case USB_AUDIO_FORMAT_IEEE_FLOAT:
2301                 pcm_format = SNDRV_PCM_FORMAT_FLOAT_LE;
2302                 break;
2303         case USB_AUDIO_FORMAT_ALAW:
2304                 pcm_format = SNDRV_PCM_FORMAT_A_LAW;
2305                 break;
2306         case USB_AUDIO_FORMAT_MU_LAW:
2307                 pcm_format = SNDRV_PCM_FORMAT_MU_LAW;
2308                 break;
2309         default:
2310                 snd_printk(KERN_INFO "%d:%u:%d : unsupported format type %d\n",
2311                            chip->dev->devnum, fp->iface, fp->altsetting, format);
2312                 break;
2313         }
2314         return pcm_format;
2315 }
2316
2317
2318 /*
2319  * parse the format descriptor and stores the possible sample rates
2320  * on the audioformat table.
2321  *
2322  * @dev: usb device
2323  * @fp: audioformat record
2324  * @fmt: the format descriptor
2325  * @offset: the start offset of descriptor pointing the rate type
2326  *          (7 for type I and II, 8 for type II)
2327  */
2328 static int parse_audio_format_rates(snd_usb_audio_t *chip, struct audioformat *fp,
2329                                     unsigned char *fmt, int offset)
2330 {
2331         int nr_rates = fmt[offset];
2332         if (fmt[0] < offset + 1 + 3 * (nr_rates ? nr_rates : 2)) {
2333                 snd_printk(KERN_ERR "%d:%u:%d : invalid FORMAT_TYPE desc\n",
2334                                    chip->dev->devnum, fp->iface, fp->altsetting);
2335                 return -1;
2336         }
2337
2338         if (nr_rates) {
2339                 /*
2340                  * build the rate table and bitmap flags
2341                  */
2342                 int r, idx, c;
2343                 /* this table corresponds to the SNDRV_PCM_RATE_XXX bit */
2344                 static unsigned int conv_rates[] = {
2345                         5512, 8000, 11025, 16000, 22050, 32000, 44100, 48000,
2346                         64000, 88200, 96000, 176400, 192000
2347                 };
2348                 fp->rate_table = kmalloc(sizeof(int) * nr_rates, GFP_KERNEL);
2349                 if (fp->rate_table == NULL) {
2350                         snd_printk(KERN_ERR "cannot malloc\n");
2351                         return -1;
2352                 }
2353
2354                 fp->nr_rates = nr_rates;
2355                 fp->rate_min = fp->rate_max = combine_triple(&fmt[8]);
2356                 for (r = 0, idx = offset + 1; r < nr_rates; r++, idx += 3) {
2357                         unsigned int rate = fp->rate_table[r] = combine_triple(&fmt[idx]);
2358                         if (rate < fp->rate_min)
2359                                 fp->rate_min = rate;
2360                         else if (rate > fp->rate_max)
2361                                 fp->rate_max = rate;
2362                         for (c = 0; c < (int)ARRAY_SIZE(conv_rates); c++) {
2363                                 if (rate == conv_rates[c]) {
2364                                         fp->rates |= (1 << c);
2365                                         break;
2366                                 }
2367                         }
2368                 }
2369         } else {
2370                 /* continuous rates */
2371                 fp->rates = SNDRV_PCM_RATE_CONTINUOUS;
2372                 fp->rate_min = combine_triple(&fmt[offset + 1]);
2373                 fp->rate_max = combine_triple(&fmt[offset + 4]);
2374         }
2375         return 0;
2376 }
2377
2378 /*
2379  * parse the format type I and III descriptors
2380  */
2381 static int parse_audio_format_i(snd_usb_audio_t *chip, struct audioformat *fp,
2382                                 int format, unsigned char *fmt)
2383 {
2384         int pcm_format;
2385
2386         if (fmt[3] == USB_FORMAT_TYPE_III) {
2387                 /* FIXME: the format type is really IECxxx
2388                  *        but we give normal PCM format to get the existing
2389                  *        apps working...
2390                  */
2391                 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
2392         } else {
2393                 pcm_format = parse_audio_format_i_type(chip, fp, format, fmt);
2394                 if (pcm_format < 0)
2395                         return -1;
2396         }
2397         fp->format = pcm_format;
2398         fp->channels = fmt[4];
2399         if (fp->channels < 1) {
2400                 snd_printk(KERN_ERR "%d:%u:%d : invalid channels %d\n",
2401                            chip->dev->devnum, fp->iface, fp->altsetting, fp->channels);
2402                 return -1;
2403         }
2404         return parse_audio_format_rates(chip, fp, fmt, 7);
2405 }
2406
2407 /*
2408  * prase the format type II descriptor
2409  */
2410 static int parse_audio_format_ii(snd_usb_audio_t *chip, struct audioformat *fp,
2411                                  int format, unsigned char *fmt)
2412 {
2413         int brate, framesize;
2414         switch (format) {
2415         case USB_AUDIO_FORMAT_AC3:
2416                 /* FIXME: there is no AC3 format defined yet */
2417                 // fp->format = SNDRV_PCM_FORMAT_AC3;
2418                 fp->format = SNDRV_PCM_FORMAT_U8; /* temporarily hack to receive byte streams */
2419                 break;
2420         case USB_AUDIO_FORMAT_MPEG:
2421                 fp->format = SNDRV_PCM_FORMAT_MPEG;
2422                 break;
2423         default:
2424                 snd_printd(KERN_INFO "%d:%u:%d : unknown format tag 0x%x is detected.  processed as MPEG.\n",
2425                            chip->dev->devnum, fp->iface, fp->altsetting, format);
2426                 fp->format = SNDRV_PCM_FORMAT_MPEG;
2427                 break;
2428         }
2429         fp->channels = 1;
2430         brate = combine_word(&fmt[4]);  /* fmt[4,5] : wMaxBitRate (in kbps) */
2431         framesize = combine_word(&fmt[6]); /* fmt[6,7]: wSamplesPerFrame */
2432         snd_printd(KERN_INFO "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
2433         fp->frame_size = framesize;
2434         return parse_audio_format_rates(chip, fp, fmt, 8); /* fmt[8..] sample rates */
2435 }
2436
2437 static int parse_audio_format(snd_usb_audio_t *chip, struct audioformat *fp,
2438                               int format, unsigned char *fmt, int stream)
2439 {
2440         int err;
2441
2442         switch (fmt[3]) {
2443         case USB_FORMAT_TYPE_I:
2444         case USB_FORMAT_TYPE_III:
2445                 err = parse_audio_format_i(chip, fp, format, fmt);
2446                 break;
2447         case USB_FORMAT_TYPE_II:
2448                 err = parse_audio_format_ii(chip, fp, format, fmt);
2449                 break;
2450         default:
2451                 snd_printd(KERN_INFO "%d:%u:%d : format type %d is not supported yet\n",
2452                            chip->dev->devnum, fp->iface, fp->altsetting, fmt[3]);
2453                 return -1;
2454         }
2455         fp->fmt_type = fmt[3];
2456         if (err < 0)
2457                 return err;
2458 #if 1
2459         /* FIXME: temporary hack for extigy/audigy 2 nx */
2460         /* extigy apparently supports sample rates other than 48k
2461          * but not in ordinary way.  so we enable only 48k atm.
2462          */
2463         if (chip->usb_id == USB_ID(0x041e, 0x3000) ||
2464             chip->usb_id == USB_ID(0x041e, 0x3020)) {
2465                 if (fmt[3] == USB_FORMAT_TYPE_I &&
2466                     fp->rates != SNDRV_PCM_RATE_48000 &&
2467                     fp->rates != SNDRV_PCM_RATE_96000)
2468                         return -1;
2469         }
2470 #endif
2471         return 0;
2472 }
2473
2474 static int parse_audio_endpoints(snd_usb_audio_t *chip, int iface_no)
2475 {
2476         struct usb_device *dev;
2477         struct usb_interface *iface;
2478         struct usb_host_interface *alts;
2479         struct usb_interface_descriptor *altsd;
2480         int i, altno, err, stream;
2481         int format;
2482         struct audioformat *fp;
2483         unsigned char *fmt, *csep;
2484
2485         dev = chip->dev;
2486
2487         /* parse the interface's altsettings */
2488         iface = usb_ifnum_to_if(dev, iface_no);
2489         for (i = 0; i < iface->num_altsetting; i++) {
2490                 alts = &iface->altsetting[i];
2491                 altsd = get_iface_desc(alts);
2492                 /* skip invalid one */
2493                 if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
2494                      altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
2495                     (altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIO_STREAMING &&
2496                      altsd->bInterfaceSubClass != USB_SUBCLASS_VENDOR_SPEC) ||
2497                     altsd->bNumEndpoints < 1 ||
2498                     le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize) == 0)
2499                         continue;
2500                 /* must be isochronous */
2501                 if ((get_endpoint(alts, 0)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
2502                     USB_ENDPOINT_XFER_ISOC)
2503                         continue;
2504                 /* check direction */
2505                 stream = (get_endpoint(alts, 0)->bEndpointAddress & USB_DIR_IN) ?
2506                         SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2507                 altno = altsd->bAlternateSetting;
2508
2509                 /* get audio formats */
2510                 fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, AS_GENERAL);
2511                 if (!fmt) {
2512                         snd_printk(KERN_ERR "%d:%u:%d : AS_GENERAL descriptor not found\n",
2513                                    dev->devnum, iface_no, altno);
2514                         continue;
2515                 }
2516
2517                 if (fmt[0] < 7) {
2518                         snd_printk(KERN_ERR "%d:%u:%d : invalid AS_GENERAL desc\n",
2519                                    dev->devnum, iface_no, altno);
2520                         continue;
2521                 }
2522
2523                 format = (fmt[6] << 8) | fmt[5]; /* remember the format value */
2524
2525                 /* get format type */
2526                 fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, FORMAT_TYPE);
2527                 if (!fmt) {
2528                         snd_printk(KERN_ERR "%d:%u:%d : no FORMAT_TYPE desc\n",
2529                                    dev->devnum, iface_no, altno);
2530                         continue;
2531                 }
2532                 if (fmt[0] < 8) {
2533                         snd_printk(KERN_ERR "%d:%u:%d : invalid FORMAT_TYPE desc\n",
2534                                    dev->devnum, iface_no, altno);
2535                         continue;
2536                 }
2537
2538                 csep = snd_usb_find_desc(alts->endpoint[0].extra, alts->endpoint[0].extralen, NULL, USB_DT_CS_ENDPOINT);
2539                 /* Creamware Noah has this descriptor after the 2nd endpoint */
2540                 if (!csep && altsd->bNumEndpoints >= 2)
2541                         csep = snd_usb_find_desc(alts->endpoint[1].extra, alts->endpoint[1].extralen, NULL, USB_DT_CS_ENDPOINT);
2542                 if (!csep || csep[0] < 7 || csep[2] != EP_GENERAL) {
2543                         snd_printk(KERN_ERR "%d:%u:%d : no or invalid class specific endpoint descriptor\n",
2544                                    dev->devnum, iface_no, altno);
2545                         continue;
2546                 }
2547
2548                 fp = kmalloc(sizeof(*fp), GFP_KERNEL);
2549                 if (! fp) {
2550                         snd_printk(KERN_ERR "cannot malloc\n");
2551                         return -ENOMEM;
2552                 }
2553
2554                 memset(fp, 0, sizeof(*fp));
2555                 fp->iface = iface_no;
2556                 fp->altsetting = altno;
2557                 fp->altset_idx = i;
2558                 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
2559                 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
2560                 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
2561                 if (snd_usb_get_speed(dev) == USB_SPEED_HIGH)
2562                         fp->maxpacksize = (((fp->maxpacksize >> 11) & 3) + 1)
2563                                         * (fp->maxpacksize & 0x7ff);
2564                 fp->attributes = csep[3];
2565
2566                 /* some quirks for attributes here */
2567
2568                 switch (chip->usb_id) {
2569                 case USB_ID(0x0a92, 0x0053): /* AudioTrak Optoplay */
2570                         /* Optoplay sets the sample rate attribute although
2571                          * it seems not supporting it in fact.
2572                          */
2573                         fp->attributes &= ~EP_CS_ATTR_SAMPLE_RATE;
2574                         break;
2575                 case USB_ID(0x041e, 0x3020): /* Creative SB Audigy 2 NX */
2576                 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
2577                         /* doesn't set the sample rate attribute, but supports it */
2578                         fp->attributes |= EP_CS_ATTR_SAMPLE_RATE;
2579                         break;
2580                 case USB_ID(0x047f, 0x0ca1): /* plantronics headset */
2581                 case USB_ID(0x077d, 0x07af): /* Griffin iMic (note that there is
2582                                                 an older model 77d:223) */
2583                 /*
2584                  * plantronics headset and Griffin iMic have set adaptive-in
2585                  * although it's really not...
2586                  */
2587                         fp->ep_attr &= ~EP_ATTR_MASK;
2588                         if (stream == SNDRV_PCM_STREAM_PLAYBACK)
2589                                 fp->ep_attr |= EP_ATTR_ADAPTIVE;
2590                         else
2591                                 fp->ep_attr |= EP_ATTR_SYNC;
2592                         break;
2593                 }
2594
2595                 /* ok, let's parse further... */
2596                 if (parse_audio_format(chip, fp, format, fmt, stream) < 0) {
2597                         kfree(fp->rate_table);
2598                         kfree(fp);
2599                         continue;
2600                 }
2601
2602                 snd_printdd(KERN_INFO "%d:%u:%d: add audio endpoint 0x%x\n", dev->devnum, iface_no, i, fp->endpoint);
2603                 err = add_audio_endpoint(chip, stream, fp);
2604                 if (err < 0) {
2605                         kfree(fp->rate_table);
2606                         kfree(fp);
2607                         return err;
2608                 }
2609                 /* try to set the interface... */
2610                 usb_set_interface(chip->dev, iface_no, altno);
2611                 init_usb_pitch(chip->dev, iface_no, alts, fp);
2612                 init_usb_sample_rate(chip->dev, iface_no, alts, fp, fp->rate_max);
2613         }
2614         return 0;
2615 }
2616
2617
2618 /*
2619  * disconnect streams
2620  * called from snd_usb_audio_disconnect()
2621  */
2622 static void snd_usb_stream_disconnect(struct list_head *head)
2623 {
2624         int idx;
2625         snd_usb_stream_t *as;
2626         snd_usb_substream_t *subs;
2627
2628         as = list_entry(head, snd_usb_stream_t, list);
2629         for (idx = 0; idx < 2; idx++) {
2630                 subs = &as->substream[idx];
2631                 if (!subs->num_formats)
2632                         return;
2633                 release_substream_urbs(subs, 1);
2634                 subs->interface = -1;
2635         }
2636 }
2637
2638 /*
2639  * parse audio control descriptor and create pcm/midi streams
2640  */
2641 static int snd_usb_create_streams(snd_usb_audio_t *chip, int ctrlif)
2642 {
2643         struct usb_device *dev = chip->dev;
2644         struct usb_host_interface *host_iface;
2645         struct usb_interface *iface;
2646         unsigned char *p1;
2647         int i, j;
2648
2649         /* find audiocontrol interface */
2650         host_iface = &usb_ifnum_to_if(dev, ctrlif)->altsetting[0];
2651         if (!(p1 = snd_usb_find_csint_desc(host_iface->extra, host_iface->extralen, NULL, HEADER))) {
2652                 snd_printk(KERN_ERR "cannot find HEADER\n");
2653                 return -EINVAL;
2654         }
2655         if (! p1[7] || p1[0] < 8 + p1[7]) {
2656                 snd_printk(KERN_ERR "invalid HEADER\n");
2657                 return -EINVAL;
2658         }
2659
2660         /*
2661          * parse all USB audio streaming interfaces
2662          */
2663         for (i = 0; i < p1[7]; i++) {
2664                 struct usb_host_interface *alts;
2665                 struct usb_interface_descriptor *altsd;
2666                 j = p1[8 + i];
2667                 iface = usb_ifnum_to_if(dev, j);
2668                 if (!iface) {
2669                         snd_printk(KERN_ERR "%d:%u:%d : does not exist\n",
2670                                    dev->devnum, ctrlif, j);
2671                         continue;
2672                 }
2673                 if (usb_interface_claimed(iface)) {
2674                         snd_printdd(KERN_INFO "%d:%d:%d: skipping, already claimed\n", dev->devnum, ctrlif, j);
2675                         continue;
2676                 }
2677                 alts = &iface->altsetting[0];
2678                 altsd = get_iface_desc(alts);
2679                 if ((altsd->bInterfaceClass == USB_CLASS_AUDIO ||
2680                      altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC) &&
2681                     altsd->bInterfaceSubClass == USB_SUBCLASS_MIDI_STREAMING) {
2682                         if (snd_usb_create_midi_interface(chip, iface, NULL) < 0) {
2683                                 snd_printk(KERN_ERR "%d:%u:%d: cannot create sequencer device\n", dev->devnum, ctrlif, j);
2684                                 continue;
2685                         }
2686                         usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
2687                         continue;
2688                 }
2689                 if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
2690                      altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
2691                     altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIO_STREAMING) {
2692                         snd_printdd(KERN_ERR "%d:%u:%d: skipping non-supported interface %d\n", dev->devnum, ctrlif, j, altsd->bInterfaceClass);
2693                         /* skip non-supported classes */
2694                         continue;
2695                 }
2696                 if (! parse_audio_endpoints(chip, j)) {
2697                         usb_set_interface(dev, j, 0); /* reset the current interface */
2698                         usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
2699                 }
2700         }
2701
2702         return 0;
2703 }
2704
2705 /*
2706  * create a stream for an endpoint/altsetting without proper descriptors
2707  */
2708 static int create_fixed_stream_quirk(snd_usb_audio_t *chip,
2709                                      struct usb_interface *iface,
2710                                      const snd_usb_audio_quirk_t *quirk)
2711 {
2712         struct audioformat *fp;
2713         struct usb_host_interface *alts;
2714         int stream, err;
2715         int *rate_table = NULL;
2716
2717         fp = kmalloc(sizeof(*fp), GFP_KERNEL);
2718         if (! fp) {
2719                 snd_printk(KERN_ERR "cannot malloc\n");
2720                 return -ENOMEM;
2721         }
2722         memcpy(fp, quirk->data, sizeof(*fp));
2723         if (fp->nr_rates > 0) {
2724                 rate_table = kmalloc(sizeof(int) * fp->nr_rates, GFP_KERNEL);
2725                 if (!rate_table) {
2726                         kfree(fp);
2727                         return -ENOMEM;
2728                 }
2729                 memcpy(rate_table, fp->rate_table, sizeof(int) * fp->nr_rates);
2730                 fp->rate_table = rate_table;
2731         }
2732
2733         stream = (fp->endpoint & USB_DIR_IN)
2734                 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2735         err = add_audio_endpoint(chip, stream, fp);
2736         if (err < 0) {
2737                 kfree(fp);
2738                 kfree(rate_table);
2739                 return err;
2740         }
2741         if (fp->iface != get_iface_desc(&iface->altsetting[0])->bInterfaceNumber ||
2742             fp->altset_idx >= iface->num_altsetting) {
2743                 kfree(fp);
2744                 kfree(rate_table);
2745                 return -EINVAL;
2746         }
2747         alts = &iface->altsetting[fp->altset_idx];
2748         usb_set_interface(chip->dev, fp->iface, 0);
2749         init_usb_pitch(chip->dev, fp->iface, alts, fp);
2750         init_usb_sample_rate(chip->dev, fp->iface, alts, fp, fp->rate_max);
2751         return 0;
2752 }
2753
2754 /*
2755  * create a stream for an interface with proper descriptors
2756  */
2757 static int create_standard_audio_quirk(snd_usb_audio_t *chip,
2758                                        struct usb_interface *iface,
2759                                        const snd_usb_audio_quirk_t *quirk)
2760 {
2761         struct usb_host_interface *alts;
2762         struct usb_interface_descriptor *altsd;
2763         int err;
2764
2765         alts = &iface->altsetting[0];
2766         altsd = get_iface_desc(alts);
2767         err = parse_audio_endpoints(chip, altsd->bInterfaceNumber);
2768         if (err < 0) {
2769                 snd_printk(KERN_ERR "cannot setup if %d: error %d\n",
2770                            altsd->bInterfaceNumber, err);
2771                 return err;
2772         }
2773         /* reset the current interface */
2774         usb_set_interface(chip->dev, altsd->bInterfaceNumber, 0);
2775         return 0;
2776 }
2777
2778 /*
2779  * Create a stream for an Edirol UA-700/UA-25 interface.  The only way
2780  * to detect the sample rate is by looking at wMaxPacketSize.
2781  */
2782 static int create_ua700_ua25_quirk(snd_usb_audio_t *chip,
2783                                    struct usb_interface *iface,
2784                                    const snd_usb_audio_quirk_t *quirk)
2785 {
2786         static const struct audioformat ua_format = {
2787                 .format = SNDRV_PCM_FORMAT_S24_3LE,
2788                 .channels = 2,
2789                 .fmt_type = USB_FORMAT_TYPE_I,
2790                 .altsetting = 1,
2791                 .altset_idx = 1,
2792                 .rates = SNDRV_PCM_RATE_CONTINUOUS,
2793         };
2794         struct usb_host_interface *alts;
2795         struct usb_interface_descriptor *altsd;
2796         struct audioformat *fp;
2797         int stream, err;
2798
2799         /* both PCM and MIDI interfaces have 2 altsettings */
2800         if (iface->num_altsetting != 2)
2801                 return -ENXIO;
2802         alts = &iface->altsetting[1];
2803         altsd = get_iface_desc(alts);
2804
2805         if (altsd->bNumEndpoints == 2) {
2806                 static const snd_usb_midi_endpoint_info_t ua700_ep = {
2807                         .out_cables = 0x0003,
2808                         .in_cables  = 0x0003
2809                 };
2810                 static const snd_usb_audio_quirk_t ua700_quirk = {
2811                         .type = QUIRK_MIDI_FIXED_ENDPOINT,
2812                         .data = &ua700_ep
2813                 };
2814                 static const snd_usb_midi_endpoint_info_t ua25_ep = {
2815                         .out_cables = 0x0001,
2816                         .in_cables  = 0x0001
2817                 };
2818                 static const snd_usb_audio_quirk_t ua25_quirk = {
2819                         .type = QUIRK_MIDI_FIXED_ENDPOINT,
2820                         .data = &ua25_ep
2821                 };
2822                 if (chip->usb_id == USB_ID(0x0582, 0x002b))
2823                         return snd_usb_create_midi_interface(chip, iface,
2824                                                              &ua700_quirk);
2825                 else
2826                         return snd_usb_create_midi_interface(chip, iface,
2827                                                              &ua25_quirk);
2828         }
2829
2830         if (altsd->bNumEndpoints != 1)
2831                 return -ENXIO;
2832
2833         fp = kmalloc(sizeof(*fp), GFP_KERNEL);
2834         if (!fp)
2835                 return -ENOMEM;
2836         memcpy(fp, &ua_format, sizeof(*fp));
2837
2838         fp->iface = altsd->bInterfaceNumber;
2839         fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
2840         fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
2841         fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
2842
2843         switch (fp->maxpacksize) {
2844         case 0x120:
2845                 fp->rate_max = fp->rate_min = 44100;
2846                 break;
2847         case 0x138:
2848         case 0x140:
2849                 fp->rate_max = fp->rate_min = 48000;
2850                 break;
2851         case 0x258:
2852         case 0x260:
2853                 fp->rate_max = fp->rate_min = 96000;
2854                 break;
2855         default:
2856                 snd_printk(KERN_ERR "unknown sample rate\n");
2857                 kfree(fp);
2858                 return -ENXIO;
2859         }
2860
2861         stream = (fp->endpoint & USB_DIR_IN)
2862                 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2863         err = add_audio_endpoint(chip, stream, fp);
2864         if (err < 0) {
2865                 kfree(fp);
2866                 return err;
2867         }
2868         usb_set_interface(chip->dev, fp->iface, 0);
2869         return 0;
2870 }
2871
2872 /*
2873  * Create a stream for an Edirol UA-1000 interface.
2874  */
2875 static int create_ua1000_quirk(snd_usb_audio_t *chip,
2876                                struct usb_interface *iface,
2877                                const snd_usb_audio_quirk_t *quirk)
2878 {
2879         static const struct audioformat ua1000_format = {
2880                 .format = SNDRV_PCM_FORMAT_S32_LE,
2881                 .fmt_type = USB_FORMAT_TYPE_I,
2882                 .altsetting = 1,
2883                 .altset_idx = 1,
2884                 .attributes = 0,
2885                 .rates = SNDRV_PCM_RATE_CONTINUOUS,
2886         };
2887         struct usb_host_interface *alts;
2888         struct usb_interface_descriptor *altsd;
2889         struct audioformat *fp;
2890         int stream, err;
2891
2892         if (iface->num_altsetting != 2)
2893                 return -ENXIO;
2894         alts = &iface->altsetting[1];
2895         altsd = get_iface_desc(alts);
2896         if (alts->extralen != 11 || alts->extra[1] != CS_AUDIO_INTERFACE ||
2897             altsd->bNumEndpoints != 1)
2898                 return -ENXIO;
2899
2900         fp = kmalloc(sizeof(*fp), GFP_KERNEL);
2901         if (!fp)
2902                 return -ENOMEM;
2903         memcpy(fp, &ua1000_format, sizeof(*fp));
2904
2905         fp->channels = alts->extra[4];
2906         fp->iface = altsd->bInterfaceNumber;
2907         fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
2908         fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
2909         fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
2910         fp->rate_max = fp->rate_min = combine_triple(&alts->extra[8]);
2911
2912         stream = (fp->endpoint & USB_DIR_IN)
2913                 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2914         err = add_audio_endpoint(chip, stream, fp);
2915         if (err < 0) {
2916                 kfree(fp);
2917                 return err;
2918         }
2919         /* FIXME: playback must be synchronized to capture */
2920         usb_set_interface(chip->dev, fp->iface, 0);
2921         return 0;
2922 }
2923
2924 static int snd_usb_create_quirk(snd_usb_audio_t *chip,
2925                                 struct usb_interface *iface,
2926                                 const snd_usb_audio_quirk_t *quirk);
2927
2928 /*
2929  * handle the quirks for the contained interfaces
2930  */
2931 static int create_composite_quirk(snd_usb_audio_t *chip,
2932                                   struct usb_interface *iface,
2933                                   const snd_usb_audio_quirk_t *quirk)
2934 {
2935         int probed_ifnum = get_iface_desc(iface->altsetting)->bInterfaceNumber;
2936         int err;
2937
2938         for (quirk = quirk->data; quirk->ifnum >= 0; ++quirk) {
2939                 iface = usb_ifnum_to_if(chip->dev, quirk->ifnum);
2940                 if (!iface)
2941                         continue;
2942                 if (quirk->ifnum != probed_ifnum &&
2943                     usb_interface_claimed(iface))
2944                         continue;
2945                 err = snd_usb_create_quirk(chip, iface, quirk);
2946                 if (err < 0)
2947                         return err;
2948                 if (quirk->ifnum != probed_ifnum)
2949                         usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
2950         }
2951         return 0;
2952 }
2953
2954 static int ignore_interface_quirk(snd_usb_audio_t *chip,
2955                                   struct usb_interface *iface,
2956                                   const snd_usb_audio_quirk_t *quirk)
2957 {
2958         return 0;
2959 }
2960
2961
2962 /*
2963  * boot quirks
2964  */
2965
2966 #define EXTIGY_FIRMWARE_SIZE_OLD 794
2967 #define EXTIGY_FIRMWARE_SIZE_NEW 483
2968
2969 static int snd_usb_extigy_boot_quirk(struct usb_device *dev, struct usb_interface *intf)
2970 {
2971         struct usb_host_config *config = dev->actconfig;
2972         int err;
2973
2974         if (le16_to_cpu(get_cfg_desc(config)->wTotalLength) == EXTIGY_FIRMWARE_SIZE_OLD ||
2975             le16_to_cpu(get_cfg_desc(config)->wTotalLength) == EXTIGY_FIRMWARE_SIZE_NEW) {
2976                 snd_printdd("sending Extigy boot sequence...\n");
2977                 /* Send message to force it to reconnect with full interface. */
2978                 err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev,0),
2979                                       0x10, 0x43, 0x0001, 0x000a, NULL, 0, 1000);
2980                 if (err < 0) snd_printdd("error sending boot message: %d\n", err);
2981                 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0,
2982                                 &dev->descriptor, sizeof(dev->descriptor));
2983                 config = dev->actconfig;
2984                 if (err < 0) snd_printdd("error usb_get_descriptor: %d\n", err);
2985                 err = usb_reset_configuration(dev);
2986                 if (err < 0) snd_printdd("error usb_reset_configuration: %d\n", err);
2987                 snd_printdd("extigy_boot: new boot length = %d\n",
2988                             le16_to_cpu(get_cfg_desc(config)->wTotalLength));
2989                 return -ENODEV; /* quit this anyway */
2990         }
2991         return 0;
2992 }
2993
2994 static int snd_usb_audigy2nx_boot_quirk(struct usb_device *dev)
2995 {
2996         u8 buf = 1;
2997
2998         snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), 0x2a,
2999                         USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_OTHER,
3000                         0, 0, &buf, 1, 1000);
3001         if (buf == 0) {
3002                 snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), 0x29,
3003                                 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
3004                                 1, 2000, NULL, 0, 1000);
3005                 return -ENODEV;
3006         }
3007         return 0;
3008 }
3009
3010
3011 /*
3012  * audio-interface quirks
3013  *
3014  * returns zero if no standard audio/MIDI parsing is needed.
3015  * returns a postive value if standard audio/midi interfaces are parsed
3016  * after this.
3017  * returns a negative value at error.
3018  */
3019 static int snd_usb_create_quirk(snd_usb_audio_t *chip,
3020                                 struct usb_interface *iface,
3021                                 const snd_usb_audio_quirk_t *quirk)
3022 {
3023         typedef int (*quirk_func_t)(snd_usb_audio_t *, struct usb_interface *,
3024                                     const snd_usb_audio_quirk_t *);
3025         static const quirk_func_t quirk_funcs[] = {
3026                 [QUIRK_IGNORE_INTERFACE] = ignore_interface_quirk,
3027                 [QUIRK_COMPOSITE] = create_composite_quirk,
3028                 [QUIRK_MIDI_STANDARD_INTERFACE] = snd_usb_create_midi_interface,
3029                 [QUIRK_MIDI_FIXED_ENDPOINT] = snd_usb_create_midi_interface,
3030                 [QUIRK_MIDI_YAMAHA] = snd_usb_create_midi_interface,
3031                 [QUIRK_MIDI_MIDIMAN] = snd_usb_create_midi_interface,
3032                 [QUIRK_MIDI_NOVATION] = snd_usb_create_midi_interface,
3033                 [QUIRK_MIDI_RAW] = snd_usb_create_midi_interface,
3034                 [QUIRK_MIDI_EMAGIC] = snd_usb_create_midi_interface,
3035                 [QUIRK_MIDI_MIDITECH] = snd_usb_create_midi_interface,
3036                 [QUIRK_AUDIO_STANDARD_INTERFACE] = create_standard_audio_quirk,
3037                 [QUIRK_AUDIO_FIXED_ENDPOINT] = create_fixed_stream_quirk,
3038                 [QUIRK_AUDIO_EDIROL_UA700_UA25] = create_ua700_ua25_quirk,
3039                 [QUIRK_AUDIO_EDIROL_UA1000] = create_ua1000_quirk,
3040         };
3041
3042         if (quirk->type < QUIRK_TYPE_COUNT) {
3043                 return quirk_funcs[quirk->type](chip, iface, quirk);
3044         } else {
3045                 snd_printd(KERN_ERR "invalid quirk type %d\n", quirk->type);
3046                 return -ENXIO;
3047         }
3048 }
3049
3050
3051 /*
3052  * common proc files to show the usb device info
3053  */
3054 static void proc_audio_usbbus_read(snd_info_entry_t *entry, snd_info_buffer_t *buffer)
3055 {
3056         snd_usb_audio_t *chip = entry->private_data;
3057         if (! chip->shutdown)
3058                 snd_iprintf(buffer, "%03d/%03d\n", chip->dev->bus->busnum, chip->dev->devnum);
3059 }
3060
3061 static void proc_audio_usbid_read(snd_info_entry_t *entry, snd_info_buffer_t *buffer)
3062 {
3063         snd_usb_audio_t *chip = entry->private_data;
3064         if (! chip->shutdown)
3065                 snd_iprintf(buffer, "%04x:%04x\n",
3066                             USB_ID_VENDOR(chip->usb_id),
3067                             USB_ID_PRODUCT(chip->usb_id));
3068 }
3069
3070 static void snd_usb_audio_create_proc(snd_usb_audio_t *chip)
3071 {
3072         snd_info_entry_t *entry;
3073         if (! snd_card_proc_new(chip->card, "usbbus", &entry))
3074                 snd_info_set_text_ops(entry, chip, 1024, proc_audio_usbbus_read);
3075         if (! snd_card_proc_new(chip->card, "usbid", &entry))
3076                 snd_info_set_text_ops(entry, chip, 1024, proc_audio_usbid_read);
3077 }
3078
3079 /*
3080  * free the chip instance
3081  *
3082  * here we have to do not much, since pcm and controls are already freed
3083  *
3084  */
3085
3086 static int snd_usb_audio_free(snd_usb_audio_t *chip)
3087 {
3088         kfree(chip);
3089         return 0;
3090 }
3091
3092 static int snd_usb_audio_dev_free(snd_device_t *device)
3093 {
3094         snd_usb_audio_t *chip = device->device_data;
3095         return snd_usb_audio_free(chip);
3096 }
3097
3098
3099 /*
3100  * create a chip instance and set its names.
3101  */
3102 static int snd_usb_audio_create(struct usb_device *dev, int idx,
3103                                 const snd_usb_audio_quirk_t *quirk,
3104                                 snd_usb_audio_t **rchip)
3105 {
3106         snd_card_t *card;
3107         snd_usb_audio_t *chip;
3108         int err, len;
3109         char component[14];
3110         static snd_device_ops_t ops = {
3111                 .dev_free =     snd_usb_audio_dev_free,
3112         };
3113
3114         *rchip = NULL;
3115
3116         if (snd_usb_get_speed(dev) != USB_SPEED_FULL &&
3117             snd_usb_get_speed(dev) != USB_SPEED_HIGH) {
3118                 snd_printk(KERN_ERR "unknown device speed %d\n", snd_usb_get_speed(dev));
3119                 return -ENXIO;
3120         }
3121
3122         card = snd_card_new(index[idx], id[idx], THIS_MODULE, 0);
3123         if (card == NULL) {
3124                 snd_printk(KERN_ERR "cannot create card instance %d\n", idx);
3125                 return -ENOMEM;
3126         }
3127
3128         chip = kzalloc(sizeof(*chip), GFP_KERNEL);
3129         if (! chip) {
3130                 snd_card_free(card);
3131                 return -ENOMEM;
3132         }
3133
3134         chip->index = idx;
3135         chip->dev = dev;
3136         chip->card = card;
3137         chip->usb_id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
3138                               le16_to_cpu(dev->descriptor.idProduct));
3139         INIT_LIST_HEAD(&chip->pcm_list);
3140         INIT_LIST_HEAD(&chip->midi_list);
3141         INIT_LIST_HEAD(&chip->mixer_list);
3142
3143         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
3144                 snd_usb_audio_free(chip);
3145                 snd_card_free(card);
3146                 return err;
3147         }
3148
3149         strcpy(card->driver, "USB-Audio");
3150         sprintf(component, "USB%04x:%04x",
3151                 USB_ID_VENDOR(chip->usb_id), USB_ID_PRODUCT(chip->usb_id));
3152         snd_component_add(card, component);
3153
3154         /* retrieve the device string as shortname */
3155         if (quirk && quirk->product_name) {
3156                 strlcpy(card->shortname, quirk->product_name, sizeof(card->shortname));
3157         } else {
3158                 if (!dev->descriptor.iProduct ||
3159                     usb_string(dev, dev->descriptor.iProduct,
3160                                card->shortname, sizeof(card->shortname)) <= 0) {
3161                         /* no name available from anywhere, so use ID */
3162                         sprintf(card->shortname, "USB Device %#04x:%#04x",
3163                                 USB_ID_VENDOR(chip->usb_id),
3164                                 USB_ID_PRODUCT(chip->usb_id));
3165                 }
3166         }
3167
3168         /* retrieve the vendor and device strings as longname */
3169         if (quirk && quirk->vendor_name) {
3170                 len = strlcpy(card->longname, quirk->vendor_name, sizeof(card->longname));
3171         } else {
3172                 if (dev->descriptor.iManufacturer)
3173                         len = usb_string(dev, dev->descriptor.iManufacturer,
3174                                          card->longname, sizeof(card->longname));
3175                 else
3176                         len = 0;
3177                 /* we don't really care if there isn't any vendor string */
3178         }
3179         if (len > 0)
3180                 strlcat(card->longname, " ", sizeof(card->longname));
3181
3182         strlcat(card->longname, card->shortname, sizeof(card->longname));
3183
3184         len = strlcat(card->longname, " at ", sizeof(card->longname));
3185
3186         if (len < sizeof(card->longname))
3187                 usb_make_path(dev, card->longname + len, sizeof(card->longname) - len);
3188
3189         strlcat(card->longname,
3190                 snd_usb_get_speed(dev) == USB_SPEED_FULL ? ", full speed" : ", high speed",
3191                 sizeof(card->longname));
3192
3193         snd_usb_audio_create_proc(chip);
3194
3195         *rchip = chip;
3196         return 0;
3197 }
3198
3199
3200 /*
3201  * probe the active usb device
3202  *
3203  * note that this can be called multiple times per a device, when it
3204  * includes multiple audio control interfaces.
3205  *
3206  * thus we check the usb device pointer and creates the card instance
3207  * only at the first time.  the successive calls of this function will
3208  * append the pcm interface to the corresponding card.
3209  */
3210 static void *snd_usb_audio_probe(struct usb_device *dev,
3211                                  struct usb_interface *intf,
3212                                  const struct usb_device_id *usb_id)
3213 {
3214         const snd_usb_audio_quirk_t *quirk = (const snd_usb_audio_quirk_t *)usb_id->driver_info;
3215         int i, err;
3216         snd_usb_audio_t *chip;
3217         struct usb_host_interface *alts;
3218         int ifnum;
3219         u32 id;
3220
3221         alts = &intf->altsetting[0];
3222         ifnum = get_iface_desc(alts)->bInterfaceNumber;
3223         id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
3224                     le16_to_cpu(dev->descriptor.idProduct));
3225
3226         if (quirk && quirk->ifnum >= 0 && ifnum != quirk->ifnum)
3227                 goto __err_val;
3228
3229         /* SB Extigy needs special boot-up sequence */
3230         /* if more models come, this will go to the quirk list. */
3231         if (id == USB_ID(0x041e, 0x3000)) {
3232                 if (snd_usb_extigy_boot_quirk(dev, intf) < 0)
3233                         goto __err_val;
3234         }
3235         /* SB Audigy 2 NX needs its own boot-up magic, too */
3236         if (id == USB_ID(0x041e, 0x3020)) {
3237                 if (snd_usb_audigy2nx_boot_quirk(dev) < 0)
3238                         goto __err_val;
3239         }
3240
3241         /*
3242          * found a config.  now register to ALSA
3243          */
3244
3245         /* check whether it's already registered */
3246         chip = NULL;
3247         down(&register_mutex);
3248         for (i = 0; i < SNDRV_CARDS; i++) {
3249                 if (usb_chip[i] && usb_chip[i]->dev == dev) {
3250                         if (usb_chip[i]->shutdown) {
3251                                 snd_printk(KERN_ERR "USB device is in the shutdown state, cannot create a card instance\n");
3252                                 goto __error;
3253                         }
3254                         chip = usb_chip[i];
3255                         break;
3256                 }
3257         }
3258         if (! chip) {
3259                 /* it's a fresh one.
3260                  * now look for an empty slot and create a new card instance
3261                  */
3262                 for (i = 0; i < SNDRV_CARDS; i++)
3263                         if (enable[i] && ! usb_chip[i] &&
3264                             (vid[i] == -1 || vid[i] == USB_ID_VENDOR(id)) &&
3265                             (pid[i] == -1 || pid[i] == USB_ID_PRODUCT(id))) {
3266                                 if (snd_usb_audio_create(dev, i, quirk, &chip) < 0) {
3267                                         goto __error;
3268                                 }
3269                                 snd_card_set_dev(chip->card, &intf->dev);
3270                                 break;
3271                         }
3272                 if (! chip) {
3273                         snd_printk(KERN_ERR "no available usb audio device\n");
3274                         goto __error;
3275                 }
3276         }
3277
3278         err = 1; /* continue */
3279         if (quirk && quirk->ifnum != QUIRK_NO_INTERFACE) {
3280                 /* need some special handlings */
3281                 if ((err = snd_usb_create_quirk(chip, intf, quirk)) < 0)
3282                         goto __error;
3283         }
3284
3285         if (err > 0) {
3286                 /* create normal USB audio interfaces */
3287                 if (snd_usb_create_streams(chip, ifnum) < 0 ||
3288                     snd_usb_create_mixer(chip, ifnum) < 0) {
3289                         goto __error;
3290                 }
3291         }
3292
3293         /* we are allowed to call snd_card_register() many times */
3294         if (snd_card_register(chip->card) < 0) {
3295                 goto __error;
3296         }
3297
3298         usb_chip[chip->index] = chip;
3299         chip->num_interfaces++;
3300         up(&register_mutex);
3301         return chip;
3302
3303  __error:
3304         if (chip && !chip->num_interfaces)
3305                 snd_card_free(chip->card);
3306         up(&register_mutex);
3307  __err_val:
3308         return NULL;
3309 }
3310
3311 /*
3312  * we need to take care of counter, since disconnection can be called also
3313  * many times as well as usb_audio_probe().
3314  */
3315 static void snd_usb_audio_disconnect(struct usb_device *dev, void *ptr)
3316 {
3317         snd_usb_audio_t *chip;
3318         snd_card_t *card;
3319         struct list_head *p;
3320
3321         if (ptr == (void *)-1L)
3322                 return;
3323
3324         chip = ptr;
3325         card = chip->card;
3326         down(&register_mutex);
3327         chip->shutdown = 1;
3328         chip->num_interfaces--;
3329         if (chip->num_interfaces <= 0) {
3330                 snd_card_disconnect(card);
3331                 /* release the pcm resources */
3332                 list_for_each(p, &chip->pcm_list) {
3333                         snd_usb_stream_disconnect(p);
3334                 }
3335                 /* release the midi resources */
3336                 list_for_each(p, &chip->midi_list) {
3337                         snd_usbmidi_disconnect(p);
3338                 }
3339                 /* release mixer resources */
3340                 list_for_each(p, &chip->mixer_list) {
3341                         snd_usb_mixer_disconnect(p);
3342                 }
3343                 usb_chip[chip->index] = NULL;
3344                 up(&register_mutex);
3345                 snd_card_free(card);
3346         } else {
3347                 up(&register_mutex);
3348         }
3349 }
3350
3351 /*
3352  * new 2.5 USB kernel API
3353  */
3354 static int usb_audio_probe(struct usb_interface *intf,
3355                            const struct usb_device_id *id)
3356 {
3357         void *chip;
3358         chip = snd_usb_audio_probe(interface_to_usbdev(intf), intf, id);
3359         if (chip) {
3360                 dev_set_drvdata(&intf->dev, chip);
3361                 return 0;
3362         } else
3363                 return -EIO;
3364 }
3365
3366 static void usb_audio_disconnect(struct usb_interface *intf)
3367 {
3368         snd_usb_audio_disconnect(interface_to_usbdev(intf),
3369                                  dev_get_drvdata(&intf->dev));
3370 }
3371
3372
3373 static int __init snd_usb_audio_init(void)
3374 {
3375         if (nrpacks < MIN_PACKS_URB || nrpacks > MAX_PACKS) {
3376                 printk(KERN_WARNING "invalid nrpacks value.\n");
3377                 return -EINVAL;
3378         }
3379         usb_register(&usb_audio_driver);
3380         return 0;
3381 }
3382
3383
3384 static void __exit snd_usb_audio_cleanup(void)
3385 {
3386         usb_deregister(&usb_audio_driver);
3387 }
3388
3389 module_init(snd_usb_audio_init);
3390 module_exit(snd_usb_audio_cleanup);