git.oblomov.eu Git - linux-2.6/blob - sound/usb/usx2y/usbusx2yaudio.c

   1 /*
   2  *   US-X2Y AUDIO
   3  *   Copyright (c) 2002-2004 by Karsten Wiese
   4  *
   5  *   based on
   6  *
   7  *   (Tentative) USB Audio Driver for ALSA
   8  *
   9  *   Main and PCM part
  10  *
  11  *   Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
  12  *
  13  *   Many codes borrowed from audio.c by
  14  *          Alan Cox (alan@lxorguk.ukuu.org.uk)
  15  *          Thomas Sailer (sailer@ife.ee.ethz.ch)
  16  *
  17  *
  18  *   This program is free software; you can redistribute it and/or modify
  19  *   it under the terms of the GNU General Public License as published by
  20  *   the Free Software Foundation; either version 2 of the License, or
  21  *   (at your option) any later version.
  22  *
  23  *   This program is distributed in the hope that it will be useful,
  24  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  25  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  26  *   GNU General Public License for more details.
  27  *
  28  *   You should have received a copy of the GNU General Public License
  29  *   along with this program; if not, write to the Free Software
  30  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  31  */
  32
  33
  34 #include <linux/interrupt.h>
  35 #include <linux/usb.h>
  36 #include <sound/core.h>
  37 #include <sound/info.h>
  38 #include <sound/pcm.h>
  39 #include <sound/pcm_params.h>
  40 #include "usx2y.h"
  41 #include "usbusx2y.h"
  42
  43 #define USX2Y_NRPACKS 4                 /* Default value used for nr of packs per urb.
  44                                           1 to 4 have been tested ok on uhci.
  45                                           To use 3 on ohci, you'd need a patch:
  46                                           look for "0000425-linux-2.6.9-rc4-mm1_ohci-hcd.patch.gz" on
  47                                           "https://bugtrack.alsa-project.org/alsa-bug/bug_view_page.php?bug_id=0000425"
  48                                           .
  49                                           1, 2 and 4 work out of the box on ohci, if I recall correctly.
  50                                           Bigger is safer operation,
  51                                           smaller gives lower latencies.
  52                                         */
  53 #define USX2Y_NRPACKS_VARIABLE y        /* If your system works ok with this module's parameter
  54                                            nrpacks set to 1, you might as well comment
  55                                            this #define out, and thereby produce smaller, faster code.
  56                                            You'd also set USX2Y_NRPACKS to 1 then.
  57                                         */
  58
  59 #ifdef USX2Y_NRPACKS_VARIABLE
  60  static int nrpacks = USX2Y_NRPACKS; /* number of packets per urb */
  61  #define  nr_of_packs() nrpacks
  62  module_param(nrpacks, int, 0444);
  63  MODULE_PARM_DESC(nrpacks, "Number of packets per URB.");
  64 #else
  65  #define nr_of_packs() USX2Y_NRPACKS
  66 #endif
  67
  68
  69 static int usX2Y_urb_capt_retire(struct snd_usX2Y_substream *subs)
  70 {
  71         struct urb      *urb = subs->completed_urb;
  72         struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
  73         unsigned char   *cp;
  74         int             i, len, lens = 0, hwptr_done = subs->hwptr_done;
  75         struct usX2Ydev *usX2Y = subs->usX2Y;
  76
  77         for (i = 0; i < nr_of_packs(); i++) {
  78                 cp = (unsigned char*)urb->transfer_buffer + urb->iso_frame_desc[i].offset;
  79                 if (urb->iso_frame_desc[i].status) { /* active? hmm, skip this */
  80                         snd_printk(KERN_ERR "active frame status %i. "
  81                                    "Most propably some hardware problem.\n",
  82                                    urb->iso_frame_desc[i].status);
  83                         return urb->iso_frame_desc[i].status;
  84                 }
  85                 len = urb->iso_frame_desc[i].actual_length / usX2Y->stride;
  86                 if (! len) {
  87                         snd_printd("0 == len ERROR!\n");
  88                         continue;
  89                 }
  90
  91                 /* copy a data chunk */
  92                 if ((hwptr_done + len) > runtime->buffer_size) {
  93                         int cnt = runtime->buffer_size - hwptr_done;
  94                         int blen = cnt * usX2Y->stride;
  95                         memcpy(runtime->dma_area + hwptr_done * usX2Y->stride, cp, blen);
  96                         memcpy(runtime->dma_area, cp + blen, len * usX2Y->stride - blen);
  97                 } else {
  98                         memcpy(runtime->dma_area + hwptr_done * usX2Y->stride, cp,
  99                                len * usX2Y->stride);
 100                 }
 101                 lens += len;
 102                 if ((hwptr_done += len) >= runtime->buffer_size)
 103                         hwptr_done -= runtime->buffer_size;
 104         }
 105
 106         subs->hwptr_done = hwptr_done;
 107         subs->transfer_done += lens;
 108         /* update the pointer, call callback if necessary */
 109         if (subs->transfer_done >= runtime->period_size) {
 110                 subs->transfer_done -= runtime->period_size;
 111                 snd_pcm_period_elapsed(subs->pcm_substream);
 112         }
 113         return 0;
 114 }
 115 /*
 116  * prepare urb for playback data pipe
 117  *
 118  * we copy the data directly from the pcm buffer.
 119  * the current position to be copied is held in hwptr field.
 120  * since a urb can handle only a single linear buffer, if the total
 121  * transferred area overflows the buffer boundary, we cannot send
 122  * it directly from the buffer.  thus the data is once copied to
 123  * a temporary buffer and urb points to that.
 124  */
 125 static int usX2Y_urb_play_prepare(struct snd_usX2Y_substream *subs,
 126                                   struct urb *cap_urb,
 127                                   struct urb *urb)
 128 {
 129         int count, counts, pack;
 130         struct usX2Ydev *usX2Y = subs->usX2Y;
 131         struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
 132
 133         count = 0;
 134         for (pack = 0; pack <  nr_of_packs(); pack++) {
 135                 /* calculate the size of a packet */
 136                 counts = cap_urb->iso_frame_desc[pack].actual_length / usX2Y->stride;
 137                 count += counts;
 138                 if (counts < 43 || counts > 50) {
 139                         snd_printk(KERN_ERR "should not be here with counts=%i\n", counts);
 140                         return -EPIPE;
 141                 }
 142                 /* set up descriptor */
 143                 urb->iso_frame_desc[pack].offset = pack ?
 144                         urb->iso_frame_desc[pack - 1].offset +
 145                         urb->iso_frame_desc[pack - 1].length :
 146                         0;
 147                 urb->iso_frame_desc[pack].length = cap_urb->iso_frame_desc[pack].actual_length;
 148         }
 149         if (atomic_read(&subs->state) >= state_PRERUNNING)
 150                 if (subs->hwptr + count > runtime->buffer_size) {
 151                         /* err, the transferred area goes over buffer boundary.
 152                          * copy the data to the temp buffer.
 153                          */
 154                         int len;
 155                         len = runtime->buffer_size - subs->hwptr;
 156                         urb->transfer_buffer = subs->tmpbuf;
 157                         memcpy(subs->tmpbuf, runtime->dma_area +
 158                                subs->hwptr * usX2Y->stride, len * usX2Y->stride);
 159                         memcpy(subs->tmpbuf + len * usX2Y->stride,
 160                                runtime->dma_area, (count - len) * usX2Y->stride);
 161                         subs->hwptr += count;
 162                         subs->hwptr -= runtime->buffer_size;
 163                 } else {
 164                         /* set the buffer pointer */
 165                         urb->transfer_buffer = runtime->dma_area + subs->hwptr * usX2Y->stride;
 166                         if ((subs->hwptr += count) >= runtime->buffer_size)
 167                         subs->hwptr -= runtime->buffer_size;
 168                 }
 169         else
 170                 urb->transfer_buffer = subs->tmpbuf;
 171         urb->transfer_buffer_length = count * usX2Y->stride;
 172         return 0;
 173 }
 174
 175 /*
 176  * process after playback data complete
 177  *
 178  * update the current position and call callback if a period is processed.
 179  */
 180 static void usX2Y_urb_play_retire(struct snd_usX2Y_substream *subs, struct urb *urb)
 181 {
 182         struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
 183         int             len = urb->actual_length / subs->usX2Y->stride;
 184
 185         subs->transfer_done += len;
 186         subs->hwptr_done +=  len;
 187         if (subs->hwptr_done >= runtime->buffer_size)
 188                 subs->hwptr_done -= runtime->buffer_size;
 189         if (subs->transfer_done >= runtime->period_size) {
 190                 subs->transfer_done -= runtime->period_size;
 191                 snd_pcm_period_elapsed(subs->pcm_substream);
 192         }
 193 }
 194
 195 static int usX2Y_urb_submit(struct snd_usX2Y_substream *subs, struct urb *urb, int frame)
 196 {
 197         int err;
 198         if (!urb)
 199                 return -ENODEV;
 200         urb->start_frame = (frame + NRURBS * nr_of_packs());  // let hcd do rollover sanity checks
 201         urb->hcpriv = NULL;
 202         urb->dev = subs->usX2Y->chip.dev; /* we need to set this at each time */
 203         if ((err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
 204                 snd_printk(KERN_ERR "usb_submit_urb() returned %i\n", err);
 205                 return err;
 206         }
 207         return 0;
 208 }
 209
 210 static inline int usX2Y_usbframe_complete(struct snd_usX2Y_substream *capsubs,
 211                                           struct snd_usX2Y_substream *playbacksubs,
 212                                           int frame)
 213 {
 214         int err, state;
 215         struct urb *urb = playbacksubs->completed_urb;
 216
 217         state = atomic_read(&playbacksubs->state);
 218         if (NULL != urb) {
 219                 if (state == state_RUNNING)
 220                         usX2Y_urb_play_retire(playbacksubs, urb);
 221                 else if (state >= state_PRERUNNING)
 222                         atomic_inc(&playbacksubs->state);
 223         } else {
 224                 switch (state) {
 225                 case state_STARTING1:
 226                         urb = playbacksubs->urb[0];
 227                         atomic_inc(&playbacksubs->state);
 228                         break;
 229                 case state_STARTING2:
 230                         urb = playbacksubs->urb[1];
 231                         atomic_inc(&playbacksubs->state);
 232                         break;
 233                 }
 234         }
 235         if (urb) {
 236                 if ((err = usX2Y_urb_play_prepare(playbacksubs, capsubs->completed_urb, urb)) ||
 237                     (err = usX2Y_urb_submit(playbacksubs, urb, frame))) {
 238                         return err;
 239                 }
 240         }
 241
 242         playbacksubs->completed_urb = NULL;
 243
 244         state = atomic_read(&capsubs->state);
 245         if (state >= state_PREPARED) {
 246                 if (state == state_RUNNING) {
 247                         if ((err = usX2Y_urb_capt_retire(capsubs)))
 248                                 return err;
 249                 } else if (state >= state_PRERUNNING)
 250                         atomic_inc(&capsubs->state);
 251                 if ((err = usX2Y_urb_submit(capsubs, capsubs->completed_urb, frame)))
 252                         return err;
 253         }
 254         capsubs->completed_urb = NULL;
 255         return 0;
 256 }
 257
 258
 259 static void usX2Y_clients_stop(struct usX2Ydev *usX2Y)
 260 {
 261         int s, u;
 262
 263         for (s = 0; s < 4; s++) {
 264                 struct snd_usX2Y_substream *subs = usX2Y->subs[s];
 265                 if (subs) {
 266                         snd_printdd("%i %p state=%i\n", s, subs, atomic_read(&subs->state));
 267                         atomic_set(&subs->state, state_STOPPED);
 268                 }
 269         }
 270         for (s = 0; s < 4; s++) {
 271                 struct snd_usX2Y_substream *subs = usX2Y->subs[s];
 272                 if (subs) {
 273                         if (atomic_read(&subs->state) >= state_PRERUNNING) {
 274                                 snd_pcm_stop(subs->pcm_substream, SNDRV_PCM_STATE_XRUN);
 275                         }
 276                         for (u = 0; u < NRURBS; u++) {
 277                                 struct urb *urb = subs->urb[u];
 278                                 if (NULL != urb)
 279                                         snd_printdd("%i status=%i start_frame=%i\n",
 280                                                     u, urb->status, urb->start_frame);
 281                         }
 282                 }
 283         }
 284         usX2Y->prepare_subs = NULL;
 285         wake_up(&usX2Y->prepare_wait_queue);
 286 }
 287
 288 static void usX2Y_error_urb_status(struct usX2Ydev *usX2Y,
 289                                    struct snd_usX2Y_substream *subs, struct urb *urb)
 290 {
 291         snd_printk(KERN_ERR "ep=%i stalled with status=%i\n", subs->endpoint, urb->status);
 292         urb->status = 0;
 293         usX2Y_clients_stop(usX2Y);
 294 }
 295
 296 static void usX2Y_error_sequence(struct usX2Ydev *usX2Y,
 297                                  struct snd_usX2Y_substream *subs, struct urb *urb)
 298 {
 299         snd_printk(KERN_ERR "Sequence Error!(hcd_frame=%i ep=%i%s;wait=%i,frame=%i).\n"
 300                    KERN_ERR "Most propably some urb of usb-frame %i is still missing.\n"
 301                    KERN_ERR "Cause could be too long delays in usb-hcd interrupt handling.\n",
 302                    usb_get_current_frame_number(usX2Y->chip.dev),
 303                    subs->endpoint, usb_pipein(urb->pipe) ? "in" : "out",
 304                    usX2Y->wait_iso_frame, urb->start_frame, usX2Y->wait_iso_frame);
 305         usX2Y_clients_stop(usX2Y);
 306 }
 307
 308 static void i_usX2Y_urb_complete(struct urb *urb)
 309 {
 310         struct snd_usX2Y_substream *subs = urb->context;
 311         struct usX2Ydev *usX2Y = subs->usX2Y;
 312
 313         if (unlikely(atomic_read(&subs->state) < state_PREPARED)) {
 314                 snd_printdd("hcd_frame=%i ep=%i%s status=%i start_frame=%i\n",
 315                             usb_get_current_frame_number(usX2Y->chip.dev),
 316                             subs->endpoint, usb_pipein(urb->pipe) ? "in" : "out",
 317                             urb->status, urb->start_frame);
 318                 return;
 319         }
 320         if (unlikely(urb->status)) {
 321                 usX2Y_error_urb_status(usX2Y, subs, urb);
 322                 return;
 323         }
 324         if (likely((urb->start_frame & 0xFFFF) == (usX2Y->wait_iso_frame & 0xFFFF)))
 325                 subs->completed_urb = urb;
 326         else {
 327                 usX2Y_error_sequence(usX2Y, subs, urb);
 328                 return;
 329         }
 330         {
 331                 struct snd_usX2Y_substream *capsubs = usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE],
 332                         *playbacksubs = usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK];
 333                 if (capsubs->completed_urb &&
 334                     atomic_read(&capsubs->state) >= state_PREPARED &&
 335                     (playbacksubs->completed_urb ||
 336                      atomic_read(&playbacksubs->state) < state_PREPARED)) {
 337                         if (!usX2Y_usbframe_complete(capsubs, playbacksubs, urb->start_frame))
 338                                 usX2Y->wait_iso_frame += nr_of_packs();
 339                         else {
 340                                 snd_printdd("\n");
 341                                 usX2Y_clients_stop(usX2Y);
 342                         }
 343                 }
 344         }
 345 }
 346
 347 static void usX2Y_urbs_set_complete(struct usX2Ydev * usX2Y,
 348                                     void (*complete)(struct urb *))
 349 {
 350         int s, u;
 351         for (s = 0; s < 4; s++) {
 352                 struct snd_usX2Y_substream *subs = usX2Y->subs[s];
 353                 if (NULL != subs)
 354                         for (u = 0; u < NRURBS; u++) {
 355                                 struct urb * urb = subs->urb[u];
 356                                 if (NULL != urb)
 357                                         urb->complete = complete;
 358                         }
 359         }
 360 }
 361
 362 static void usX2Y_subs_startup_finish(struct usX2Ydev * usX2Y)
 363 {
 364         usX2Y_urbs_set_complete(usX2Y, i_usX2Y_urb_complete);
 365         usX2Y->prepare_subs = NULL;
 366 }
 367
 368 static void i_usX2Y_subs_startup(struct urb *urb)
 369 {
 370         struct snd_usX2Y_substream *subs = urb->context;
 371         struct usX2Ydev *usX2Y = subs->usX2Y;
 372         struct snd_usX2Y_substream *prepare_subs = usX2Y->prepare_subs;
 373         if (NULL != prepare_subs)
 374                 if (urb->start_frame == prepare_subs->urb[0]->start_frame) {
 375                         usX2Y_subs_startup_finish(usX2Y);
 376                         atomic_inc(&prepare_subs->state);
 377                         wake_up(&usX2Y->prepare_wait_queue);
 378                 }
 379
 380         i_usX2Y_urb_complete(urb);
 381 }
 382
 383 static void usX2Y_subs_prepare(struct snd_usX2Y_substream *subs)
 384 {
 385         snd_printdd("usX2Y_substream_prepare(%p) ep=%i urb0=%p urb1=%p\n",
 386                     subs, subs->endpoint, subs->urb[0], subs->urb[1]);
 387         /* reset the pointer */
 388         subs->hwptr = 0;
 389         subs->hwptr_done = 0;
 390         subs->transfer_done = 0;
 391 }
 392
 393
 394 static void usX2Y_urb_release(struct urb **urb, int free_tb)
 395 {
 396         if (*urb) {
 397                 usb_kill_urb(*urb);
 398                 if (free_tb)
 399                         kfree((*urb)->transfer_buffer);
 400                 usb_free_urb(*urb);
 401                 *urb = NULL;
 402         }
 403 }
 404 /*
 405  * release a substreams urbs
 406  */
 407 static void usX2Y_urbs_release(struct snd_usX2Y_substream *subs)
 408 {
 409         int i;
 410         snd_printdd("usX2Y_urbs_release() %i\n", subs->endpoint);
 411         for (i = 0; i < NRURBS; i++)
 412                 usX2Y_urb_release(subs->urb + i,
 413                                   subs != subs->usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK]);
 414
 415         kfree(subs->tmpbuf);
 416         subs->tmpbuf = NULL;
 417 }
 418 /*
 419  * initialize a substream's urbs
 420  */
 421 static int usX2Y_urbs_allocate(struct snd_usX2Y_substream *subs)
 422 {
 423         int i;
 424         unsigned int pipe;
 425         int is_playback = subs == subs->usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK];
 426         struct usb_device *dev = subs->usX2Y->chip.dev;
 427
 428         pipe = is_playback ? usb_sndisocpipe(dev, subs->endpoint) :
 429                         usb_rcvisocpipe(dev, subs->endpoint);
 430         subs->maxpacksize = usb_maxpacket(dev, pipe, is_playback);
 431         if (!subs->maxpacksize)
 432                 return -EINVAL;
 433
 434         if (is_playback && NULL == subs->tmpbuf) {      /* allocate a temporary buffer for playback */
 435                 subs->tmpbuf = kcalloc(nr_of_packs(), subs->maxpacksize, GFP_KERNEL);
 436                 if (NULL == subs->tmpbuf) {
 437                         snd_printk(KERN_ERR "cannot malloc tmpbuf\n");
 438                         return -ENOMEM;
 439                 }
 440         }
 441         /* allocate and initialize data urbs */
 442         for (i = 0; i < NRURBS; i++) {
 443                 struct urb **purb = subs->urb + i;
 444                 if (*purb) {
 445                         usb_kill_urb(*purb);
 446                         continue;
 447                 }
 448                 *purb = usb_alloc_urb(nr_of_packs(), GFP_KERNEL);
 449                 if (NULL == *purb) {
 450                         usX2Y_urbs_release(subs);
 451                         return -ENOMEM;
 452                 }
 453                 if (!is_playback && !(*purb)->transfer_buffer) {
 454                         /* allocate a capture buffer per urb */
 455                         (*purb)->transfer_buffer = kmalloc(subs->maxpacksize * nr_of_packs(), GFP_KERNEL);
 456                         if (NULL == (*purb)->transfer_buffer) {
 457                                 usX2Y_urbs_release(subs);
 458                                 return -ENOMEM;
 459                         }
 460                 }
 461                 (*purb)->dev = dev;
 462                 (*purb)->pipe = pipe;
 463                 (*purb)->number_of_packets = nr_of_packs();
 464                 (*purb)->context = subs;
 465                 (*purb)->interval = 1;
 466                 (*purb)->complete = i_usX2Y_subs_startup;
 467         }
 468         return 0;
 469 }
 470
 471 static void usX2Y_subs_startup(struct snd_usX2Y_substream *subs)
 472 {
 473         struct usX2Ydev *usX2Y = subs->usX2Y;
 474         usX2Y->prepare_subs = subs;
 475         subs->urb[0]->start_frame = -1;
 476         wmb();
 477         usX2Y_urbs_set_complete(usX2Y, i_usX2Y_subs_startup);
 478 }
 479
 480 static int usX2Y_urbs_start(struct snd_usX2Y_substream *subs)
 481 {
 482         int i, err;
 483         struct usX2Ydev *usX2Y = subs->usX2Y;
 484
 485         if ((err = usX2Y_urbs_allocate(subs)) < 0)
 486                 return err;
 487         subs->completed_urb = NULL;
 488         for (i = 0; i < 4; i++) {
 489                 struct snd_usX2Y_substream *subs = usX2Y->subs[i];
 490                 if (subs != NULL && atomic_read(&subs->state) >= state_PREPARED)
 491                         goto start;
 492         }
 493
 494  start:
 495         usX2Y_subs_startup(subs);
 496         for (i = 0; i < NRURBS; i++) {
 497                 struct urb *urb = subs->urb[i];
 498                 if (usb_pipein(urb->pipe)) {
 499                         unsigned long pack;
 500                         if (0 == i)
 501                                 atomic_set(&subs->state, state_STARTING3);
 502                         urb->dev = usX2Y->chip.dev;
 503                         urb->transfer_flags = URB_ISO_ASAP;
 504                         for (pack = 0; pack < nr_of_packs(); pack++) {
 505                                 urb->iso_frame_desc[pack].offset = subs->maxpacksize * pack;
 506                                 urb->iso_frame_desc[pack].length = subs->maxpacksize;
 507                         }
 508                         urb->transfer_buffer_length = subs->maxpacksize * nr_of_packs();
 509                         if ((err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
 510                                 snd_printk (KERN_ERR "cannot submit datapipe for urb %d, err = %d\n", i, err);
 511                                 err = -EPIPE;
 512                                 goto cleanup;
 513                         } else
 514                                 if (i == 0)
 515                                         usX2Y->wait_iso_frame = urb->start_frame;
 516                         urb->transfer_flags = 0;
 517                 } else {
 518                         atomic_set(&subs->state, state_STARTING1);
 519                         break;
 520                 }
 521         }
 522         err = 0;
 523         wait_event(usX2Y->prepare_wait_queue, NULL == usX2Y->prepare_subs);
 524         if (atomic_read(&subs->state) != state_PREPARED)
 525                 err = -EPIPE;
 526
 527  cleanup:
 528         if (err) {
 529                 usX2Y_subs_startup_finish(usX2Y);
 530                 usX2Y_clients_stop(usX2Y);              // something is completely wroong > stop evrything
 531         }
 532         return err;
 533 }
 534
 535 /*
 536  * return the current pcm pointer.  just return the hwptr_done value.
 537  */
 538 static snd_pcm_uframes_t snd_usX2Y_pcm_pointer(struct snd_pcm_substream *substream)
 539 {
 540         struct snd_usX2Y_substream *subs = substream->runtime->private_data;
 541         return subs->hwptr_done;
 542 }
 543 /*
 544  * start/stop substream
 545  */
 546 static int snd_usX2Y_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
 547 {
 548         struct snd_usX2Y_substream *subs = substream->runtime->private_data;
 549
 550         switch (cmd) {
 551         case SNDRV_PCM_TRIGGER_START:
 552                 snd_printdd("snd_usX2Y_pcm_trigger(START)\n");
 553                 if (atomic_read(&subs->state) == state_PREPARED &&
 554                     atomic_read(&subs->usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE]->state) >= state_PREPARED) {
 555                         atomic_set(&subs->state, state_PRERUNNING);
 556                 } else {
 557                         snd_printdd("\n");
 558                         return -EPIPE;
 559                 }
 560                 break;
 561         case SNDRV_PCM_TRIGGER_STOP:
 562                 snd_printdd("snd_usX2Y_pcm_trigger(STOP)\n");
 563                 if (atomic_read(&subs->state) >= state_PRERUNNING)
 564                         atomic_set(&subs->state, state_PREPARED);
 565                 break;
 566         default:
 567                 return -EINVAL;
 568         }
 569         return 0;
 570 }
 571
 572
 573 /*
 574  * allocate a buffer, setup samplerate
 575  *
 576  * so far we use a physically linear buffer although packetize transfer
 577  * doesn't need a continuous area.
 578  * if sg buffer is supported on the later version of alsa, we'll follow
 579  * that.
 580  */
 581 static struct s_c2
 582 {
 583         char c1, c2;
 584 }
 585         SetRate44100[] =
 586 {
 587         { 0x14, 0x08},  // this line sets 44100, well actually a little less
 588         { 0x18, 0x40},  // only tascam / frontier design knows the further lines .......
 589         { 0x18, 0x42},
 590         { 0x18, 0x45},
 591         { 0x18, 0x46},
 592         { 0x18, 0x48},
 593         { 0x18, 0x4A},
 594         { 0x18, 0x4C},
 595         { 0x18, 0x4E},
 596         { 0x18, 0x50},
 597         { 0x18, 0x52},
 598         { 0x18, 0x54},
 599         { 0x18, 0x56},
 600         { 0x18, 0x58},
 601         { 0x18, 0x5A},
 602         { 0x18, 0x5C},
 603         { 0x18, 0x5E},
 604         { 0x18, 0x60},
 605         { 0x18, 0x62},
 606         { 0x18, 0x64},
 607         { 0x18, 0x66},
 608         { 0x18, 0x68},
 609         { 0x18, 0x6A},
 610         { 0x18, 0x6C},
 611         { 0x18, 0x6E},
 612         { 0x18, 0x70},
 613         { 0x18, 0x72},
 614         { 0x18, 0x74},
 615         { 0x18, 0x76},
 616         { 0x18, 0x78},
 617         { 0x18, 0x7A},
 618         { 0x18, 0x7C},
 619         { 0x18, 0x7E}
 620 };
 621 static struct s_c2 SetRate48000[] =
 622 {
 623         { 0x14, 0x09},  // this line sets 48000, well actually a little less
 624         { 0x18, 0x40},  // only tascam / frontier design knows the further lines .......
 625         { 0x18, 0x42},
 626         { 0x18, 0x45},
 627         { 0x18, 0x46},
 628         { 0x18, 0x48},
 629         { 0x18, 0x4A},
 630         { 0x18, 0x4C},
 631         { 0x18, 0x4E},
 632         { 0x18, 0x50},
 633         { 0x18, 0x52},
 634         { 0x18, 0x54},
 635         { 0x18, 0x56},
 636         { 0x18, 0x58},
 637         { 0x18, 0x5A},
 638         { 0x18, 0x5C},
 639         { 0x18, 0x5E},
 640         { 0x18, 0x60},
 641         { 0x18, 0x62},
 642         { 0x18, 0x64},
 643         { 0x18, 0x66},
 644         { 0x18, 0x68},
 645         { 0x18, 0x6A},
 646         { 0x18, 0x6C},
 647         { 0x18, 0x6E},
 648         { 0x18, 0x70},
 649         { 0x18, 0x73},
 650         { 0x18, 0x74},
 651         { 0x18, 0x76},
 652         { 0x18, 0x78},
 653         { 0x18, 0x7A},
 654         { 0x18, 0x7C},
 655         { 0x18, 0x7E}
 656 };
 657 #define NOOF_SETRATE_URBS ARRAY_SIZE(SetRate48000)
 658
 659 static void i_usX2Y_04Int(struct urb *urb)
 660 {
 661         struct usX2Ydev *usX2Y = urb->context;
 662
 663         if (urb->status)
 664                 snd_printk(KERN_ERR "snd_usX2Y_04Int() urb->status=%i\n", urb->status);
 665         if (0 == --usX2Y->US04->len)
 666                 wake_up(&usX2Y->In04WaitQueue);
 667 }
 668
 669 static int usX2Y_rate_set(struct usX2Ydev *usX2Y, int rate)
 670 {
 671         int                     err = 0, i;
 672         struct snd_usX2Y_urbSeq *us = NULL;
 673         int                     *usbdata = NULL;
 674         struct s_c2             *ra = rate == 48000 ? SetRate48000 : SetRate44100;
 675
 676         if (usX2Y->rate != rate) {
 677                 us = kzalloc(sizeof(*us) + sizeof(struct urb*) * NOOF_SETRATE_URBS, GFP_KERNEL);
 678                 if (NULL == us) {
 679                         err = -ENOMEM;
 680                         goto cleanup;
 681                 }
 682                 usbdata = kmalloc(sizeof(int) * NOOF_SETRATE_URBS, GFP_KERNEL);
 683                 if (NULL == usbdata) {
 684                         err = -ENOMEM;
 685                         goto cleanup;
 686                 }
 687                 for (i = 0; i < NOOF_SETRATE_URBS; ++i) {
 688                         if (NULL == (us->urb[i] = usb_alloc_urb(0, GFP_KERNEL))) {
 689                                 err = -ENOMEM;
 690                                 goto cleanup;
 691                         }
 692                         ((char*)(usbdata + i))[0] = ra[i].c1;
 693                         ((char*)(usbdata + i))[1] = ra[i].c2;
 694                         usb_fill_bulk_urb(us->urb[i], usX2Y->chip.dev, usb_sndbulkpipe(usX2Y->chip.dev, 4),
 695                                           usbdata + i, 2, i_usX2Y_04Int, usX2Y);
 696 #ifdef OLD_USB
 697                         us->urb[i]->transfer_flags = USB_QUEUE_BULK;
 698 #endif
 699                 }
 700                 us->submitted = 0;
 701                 us->len =       NOOF_SETRATE_URBS;
 702                 usX2Y->US04 =   us;
 703                 wait_event_timeout(usX2Y->In04WaitQueue, 0 == us->len, HZ);
 704                 usX2Y->US04 =   NULL;
 705                 if (us->len)
 706                         err = -ENODEV;
 707         cleanup:
 708                 if (us) {
 709                         us->submitted = 2*NOOF_SETRATE_URBS;
 710                         for (i = 0; i < NOOF_SETRATE_URBS; ++i) {
 711                                 struct urb *urb = us->urb[i];
 712                                 if (urb->status) {
 713                                         if (!err)
 714                                                 err = -ENODEV;
 715                                         usb_kill_urb(urb);
 716                                 }
 717                                 usb_free_urb(urb);
 718                         }
 719                         usX2Y->US04 = NULL;
 720                         kfree(usbdata);
 721                         kfree(us);
 722                         if (!err)
 723                                 usX2Y->rate = rate;
 724                 }
 725         }
 726
 727         return err;
 728 }
 729
 730
 731 static int usX2Y_format_set(struct usX2Ydev *usX2Y, snd_pcm_format_t format)
 732 {
 733         int alternate, err;
 734         struct list_head* p;
 735         if (format == SNDRV_PCM_FORMAT_S24_3LE) {
 736                 alternate = 2;
 737                 usX2Y->stride = 6;
 738         } else {
 739                 alternate = 1;
 740                 usX2Y->stride = 4;
 741         }
 742         list_for_each(p, &usX2Y->chip.midi_list) {
 743                 snd_usbmidi_input_stop(p);
 744         }
 745         usb_kill_urb(usX2Y->In04urb);
 746         if ((err = usb_set_interface(usX2Y->chip.dev, 0, alternate))) {
 747                 snd_printk(KERN_ERR "usb_set_interface error \n");
 748                 return err;
 749         }
 750         usX2Y->In04urb->dev = usX2Y->chip.dev;
 751         err = usb_submit_urb(usX2Y->In04urb, GFP_KERNEL);
 752         list_for_each(p, &usX2Y->chip.midi_list) {
 753                 snd_usbmidi_input_start(p);
 754         }
 755         usX2Y->format = format;
 756         usX2Y->rate = 0;
 757         return err;
 758 }
 759
 760
 761 static int snd_usX2Y_pcm_hw_params(struct snd_pcm_substream *substream,
 762                                    struct snd_pcm_hw_params *hw_params)
 763 {
 764         int                     err = 0;
 765         unsigned int            rate = params_rate(hw_params);
 766         snd_pcm_format_t        format = params_format(hw_params);
 767         struct snd_card *card = substream->pstr->pcm->card;
 768         struct list_head *list;
 769
 770         snd_printdd("snd_usX2Y_hw_params(%p, %p)\n", substream, hw_params);
 771         // all pcm substreams off one usX2Y have to operate at the same rate & format
 772         list_for_each(list, &card->devices) {
 773                 struct snd_device *dev;
 774                 struct snd_pcm *pcm;
 775                 int s;
 776                 dev = snd_device(list);
 777                 if (dev->type != SNDRV_DEV_PCM)
 778                         continue;
 779                 pcm = dev->device_data;
 780                 for (s = 0; s < 2; ++s) {
 781                         struct snd_pcm_substream *test_substream;
 782                         test_substream = pcm->streams[s].substream;
 783                         if (test_substream && test_substream != substream  &&
 784                             test_substream->runtime &&
 785                             ((test_substream->runtime->format &&
 786                               test_substream->runtime->format != format) ||
 787                              (test_substream->runtime->rate &&
 788                               test_substream->runtime->rate != rate)))
 789                                 return -EINVAL;
 790                 }
 791         }
 792         if (0 > (err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params)))) {
 793                 snd_printk(KERN_ERR "snd_pcm_lib_malloc_pages(%p, %i) returned %i\n",
 794                            substream, params_buffer_bytes(hw_params), err);
 795                 return err;
 796         }
 797         return 0;
 798 }
 799
 800 /*
 801  * free the buffer
 802  */
 803 static int snd_usX2Y_pcm_hw_free(struct snd_pcm_substream *substream)
 804 {
 805         struct snd_pcm_runtime *runtime = substream->runtime;
 806         struct snd_usX2Y_substream *subs = runtime->private_data;
 807         mutex_lock(&subs->usX2Y->prepare_mutex);
 808         snd_printdd("snd_usX2Y_hw_free(%p)\n", substream);
 809
 810         if (SNDRV_PCM_STREAM_PLAYBACK == substream->stream) {
 811                 struct snd_usX2Y_substream *cap_subs = subs->usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE];
 812                 atomic_set(&subs->state, state_STOPPED);
 813                 usX2Y_urbs_release(subs);
 814                 if (!cap_subs->pcm_substream ||
 815                     !cap_subs->pcm_substream->runtime ||
 816                     !cap_subs->pcm_substream->runtime->status ||
 817                     cap_subs->pcm_substream->runtime->status->state < SNDRV_PCM_STATE_PREPARED) {
 818                         atomic_set(&cap_subs->state, state_STOPPED);
 819                         usX2Y_urbs_release(cap_subs);
 820                 }
 821         } else {
 822                 struct snd_usX2Y_substream *playback_subs = subs->usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK];
 823                 if (atomic_read(&playback_subs->state) < state_PREPARED) {
 824                         atomic_set(&subs->state, state_STOPPED);
 825                         usX2Y_urbs_release(subs);
 826                 }
 827         }
 828         mutex_unlock(&subs->usX2Y->prepare_mutex);
 829         return snd_pcm_lib_free_pages(substream);
 830 }
 831 /*
 832  * prepare callback
 833  *
 834  * set format and initialize urbs
 835  */
 836 static int snd_usX2Y_pcm_prepare(struct snd_pcm_substream *substream)
 837 {
 838         struct snd_pcm_runtime *runtime = substream->runtime;
 839         struct snd_usX2Y_substream *subs = runtime->private_data;
 840         struct usX2Ydev *usX2Y = subs->usX2Y;
 841         struct snd_usX2Y_substream *capsubs = subs->usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE];
 842         int err = 0;
 843         snd_printdd("snd_usX2Y_pcm_prepare(%p)\n", substream);
 844
 845         mutex_lock(&usX2Y->prepare_mutex);
 846         usX2Y_subs_prepare(subs);
 847 // Start hardware streams
 848 // SyncStream first....
 849         if (atomic_read(&capsubs->state) < state_PREPARED) {
 850                 if (usX2Y->format != runtime->format)
 851                         if ((err = usX2Y_format_set(usX2Y, runtime->format)) < 0)
 852                                 goto up_prepare_mutex;
 853                 if (usX2Y->rate != runtime->rate)
 854                         if ((err = usX2Y_rate_set(usX2Y, runtime->rate)) < 0)
 855                                 goto up_prepare_mutex;
 856                 snd_printdd("starting capture pipe for %s\n", subs == capsubs ? "self" : "playpipe");
 857                 if (0 > (err = usX2Y_urbs_start(capsubs)))
 858                         goto up_prepare_mutex;
 859         }
 860
 861         if (subs != capsubs && atomic_read(&subs->state) < state_PREPARED)
 862                 err = usX2Y_urbs_start(subs);
 863
 864  up_prepare_mutex:
 865         mutex_unlock(&usX2Y->prepare_mutex);
 866         return err;
 867 }
 868
 869 static struct snd_pcm_hardware snd_usX2Y_2c =
 870 {
 871         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 872                                  SNDRV_PCM_INFO_BLOCK_TRANSFER |
 873                                  SNDRV_PCM_INFO_MMAP_VALID),
 874         .formats =                 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_3LE,
 875         .rates =                   SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000,
 876         .rate_min =                44100,
 877         .rate_max =                48000,
 878         .channels_min =            2,
 879         .channels_max =            2,
 880         .buffer_bytes_max =     (2*128*1024),
 881         .period_bytes_min =     64,
 882         .period_bytes_max =     (128*1024),
 883         .periods_min =          2,
 884         .periods_max =          1024,
 885         .fifo_size =              0
 886 };
 887
 888
 889
 890 static int snd_usX2Y_pcm_open(struct snd_pcm_substream *substream)
 891 {
 892         struct snd_usX2Y_substream      *subs = ((struct snd_usX2Y_substream **)
 893                                          snd_pcm_substream_chip(substream))[substream->stream];
 894         struct snd_pcm_runtime  *runtime = substream->runtime;
 895
 896         if (subs->usX2Y->chip_status & USX2Y_STAT_CHIP_MMAP_PCM_URBS)
 897                 return -EBUSY;
 898
 899         runtime->hw = snd_usX2Y_2c;
 900         runtime->private_data = subs;
 901         subs->pcm_substream = substream;
 902         snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME, 1000, 200000);
 903         return 0;
 904 }
 905
 906
 907
 908 static int snd_usX2Y_pcm_close(struct snd_pcm_substream *substream)
 909 {
 910         struct snd_pcm_runtime *runtime = substream->runtime;
 911         struct snd_usX2Y_substream *subs = runtime->private_data;
 912
 913         subs->pcm_substream = NULL;
 914
 915         return 0;
 916 }
 917
 918
 919 static struct snd_pcm_ops snd_usX2Y_pcm_ops =
 920 {
 921         .open =         snd_usX2Y_pcm_open,
 922         .close =        snd_usX2Y_pcm_close,
 923         .ioctl =        snd_pcm_lib_ioctl,
 924         .hw_params =    snd_usX2Y_pcm_hw_params,
 925         .hw_free =      snd_usX2Y_pcm_hw_free,
 926         .prepare =      snd_usX2Y_pcm_prepare,
 927         .trigger =      snd_usX2Y_pcm_trigger,
 928         .pointer =      snd_usX2Y_pcm_pointer,
 929 };
 930
 931
 932 /*
 933  * free a usb stream instance
 934  */
 935 static void usX2Y_audio_stream_free(struct snd_usX2Y_substream **usX2Y_substream)
 936 {
 937         kfree(usX2Y_substream[SNDRV_PCM_STREAM_PLAYBACK]);
 938         usX2Y_substream[SNDRV_PCM_STREAM_PLAYBACK] = NULL;
 939
 940         kfree(usX2Y_substream[SNDRV_PCM_STREAM_CAPTURE]);
 941         usX2Y_substream[SNDRV_PCM_STREAM_CAPTURE] = NULL;
 942 }
 943
 944 static void snd_usX2Y_pcm_private_free(struct snd_pcm *pcm)
 945 {
 946         struct snd_usX2Y_substream **usX2Y_stream = pcm->private_data;
 947         if (usX2Y_stream)
 948                 usX2Y_audio_stream_free(usX2Y_stream);
 949 }
 950
 951 static int usX2Y_audio_stream_new(struct snd_card *card, int playback_endpoint, int capture_endpoint)
 952 {
 953         struct snd_pcm *pcm;
 954         int err, i;
 955         struct snd_usX2Y_substream **usX2Y_substream =
 956                 usX2Y(card)->subs + 2 * usX2Y(card)->chip.pcm_devs;
 957
 958         for (i = playback_endpoint ? SNDRV_PCM_STREAM_PLAYBACK : SNDRV_PCM_STREAM_CAPTURE;
 959              i <= SNDRV_PCM_STREAM_CAPTURE; ++i) {
 960                 usX2Y_substream[i] = kzalloc(sizeof(struct snd_usX2Y_substream), GFP_KERNEL);
 961                 if (NULL == usX2Y_substream[i]) {
 962                         snd_printk(KERN_ERR "cannot malloc\n");
 963                         return -ENOMEM;
 964                 }
 965                 usX2Y_substream[i]->usX2Y = usX2Y(card);
 966         }
 967
 968         if (playback_endpoint)
 969                 usX2Y_substream[SNDRV_PCM_STREAM_PLAYBACK]->endpoint = playback_endpoint;
 970         usX2Y_substream[SNDRV_PCM_STREAM_CAPTURE]->endpoint = capture_endpoint;
 971
 972         err = snd_pcm_new(card, NAME_ALLCAPS" Audio", usX2Y(card)->chip.pcm_devs,
 973                           playback_endpoint ? 1 : 0, 1,
 974                           &pcm);
 975         if (err < 0) {
 976                 usX2Y_audio_stream_free(usX2Y_substream);
 977                 return err;
 978         }
 979
 980         if (playback_endpoint)
 981                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_usX2Y_pcm_ops);
 982         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_usX2Y_pcm_ops);
 983
 984         pcm->private_data = usX2Y_substream;
 985         pcm->private_free = snd_usX2Y_pcm_private_free;
 986         pcm->info_flags = 0;
 987
 988         sprintf(pcm->name, NAME_ALLCAPS" Audio #%d", usX2Y(card)->chip.pcm_devs);
 989
 990         if ((playback_endpoint &&
 991              0 > (err = snd_pcm_lib_preallocate_pages(pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream,
 992                                                      SNDRV_DMA_TYPE_CONTINUOUS,
 993                                                      snd_dma_continuous_data(GFP_KERNEL),
 994                                                      64*1024, 128*1024))) ||
 995             0 > (err = snd_pcm_lib_preallocate_pages(pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream,
 996                                                      SNDRV_DMA_TYPE_CONTINUOUS,
 997                                                      snd_dma_continuous_data(GFP_KERNEL),
 998                                                      64*1024, 128*1024))) {
 999                 snd_usX2Y_pcm_private_free(pcm);
1000                 return err;
1001         }
1002         usX2Y(card)->chip.pcm_devs++;
1003
1004         return 0;
1005 }
1006
1007 /*
1008  * create a chip instance and set its names.
1009  */
1010 int usX2Y_audio_create(struct snd_card *card)
1011 {
1012         int err = 0;
1013
1014         INIT_LIST_HEAD(&usX2Y(card)->chip.pcm_list);
1015
1016         if (0 > (err = usX2Y_audio_stream_new(card, 0xA, 0x8)))
1017                 return err;
1018         if (le16_to_cpu(usX2Y(card)->chip.dev->descriptor.idProduct) == USB_ID_US428)
1019              if (0 > (err = usX2Y_audio_stream_new(card, 0, 0xA)))
1020                      return err;
1021         if (le16_to_cpu(usX2Y(card)->chip.dev->descriptor.idProduct) != USB_ID_US122)
1022                 err = usX2Y_rate_set(usX2Y(card), 44100);       // Lets us428 recognize output-volume settings, disturbs us122.
1023         return err;
1024 }