sound/firewire/speakers.c

   1 /*
   2  * OXFW970-based speakers driver
   3  *
   4  * Copyright (c) Clemens Ladisch <clemens@ladisch.de>
   5  * Licensed under the terms of the GNU General Public License, version 2.
   6  */
   7
   8 #include <linux/device.h>
   9 #include <linux/firewire.h>
  10 #include <linux/firewire-constants.h>
  11 #include <linux/module.h>
  12 #include <linux/mod_devicetable.h>
  13 #include <linux/mutex.h>
  14 #include <linux/slab.h>
  15 #include <sound/control.h>
  16 #include <sound/core.h>
  17 #include <sound/initval.h>
  18 #include <sound/pcm.h>
  19 #include <sound/pcm_params.h>
  20 #include "cmp.h"
  21 #include "fcp.h"
  22 #include "amdtp.h"
  23 #include "lib.h"
  24
  25 #define OXFORD_FIRMWARE_ID_ADDRESS      (CSR_REGISTER_BASE + 0x50000)
  26 /* 0x970?vvvv or 0x971?vvvv, where vvvv = firmware version */
  27
  28 #define OXFORD_HARDWARE_ID_ADDRESS      (CSR_REGISTER_BASE + 0x90020)
  29 #define OXFORD_HARDWARE_ID_OXFW970      0x39443841
  30 #define OXFORD_HARDWARE_ID_OXFW971      0x39373100
  31
  32 #define VENDOR_GRIFFIN          0x001292
  33 #define VENDOR_LACIE            0x00d04b
  34
  35 #define SPECIFIER_1394TA        0x00a02d
  36 #define VERSION_AVC             0x010001
  37
  38 struct device_info {
  39         const char *driver_name;
  40         const char *short_name;
  41         const char *long_name;
  42         int (*pcm_constraints)(struct snd_pcm_runtime *runtime);
  43         unsigned int mixer_channels;
  44         u8 mute_fb_id;
  45         u8 volume_fb_id;
  46 };
  47
  48 struct fwspk {
  49         struct snd_card *card;
  50         struct fw_unit *unit;
  51         const struct device_info *device_info;
  52         struct snd_pcm_substream *pcm;
  53         struct mutex mutex;
  54         struct cmp_connection connection;
  55         struct amdtp_out_stream stream;
  56         bool stream_running;
  57         bool mute;
  58         s16 volume[6];
  59         s16 volume_min;
  60         s16 volume_max;
  61 };
  62
  63 MODULE_DESCRIPTION("FireWire speakers driver");
  64 MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
  65 MODULE_LICENSE("GPL v2");
  66
  67 static int firewave_rate_constraint(struct snd_pcm_hw_params *params,
  68                                     struct snd_pcm_hw_rule *rule)
  69 {
  70         static unsigned int stereo_rates[] = { 48000, 96000 };
  71         struct snd_interval *channels =
  72                         hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
  73         struct snd_interval *rate =
  74                         hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
  75
  76         /* two channels work only at 48/96 kHz */
  77         if (snd_interval_max(channels) < 6)
  78                 return snd_interval_list(rate, 2, stereo_rates, 0);
  79         return 0;
  80 }
  81
  82 static int firewave_channels_constraint(struct snd_pcm_hw_params *params,
  83                                         struct snd_pcm_hw_rule *rule)
  84 {
  85         static const struct snd_interval all_channels = { .min = 6, .max = 6 };
  86         struct snd_interval *rate =
  87                         hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
  88         struct snd_interval *channels =
  89                         hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
  90
  91         /* 32/44.1 kHz work only with all six channels */
  92         if (snd_interval_max(rate) < 48000)
  93                 return snd_interval_refine(channels, &all_channels);
  94         return 0;
  95 }
  96
  97 static int firewave_constraints(struct snd_pcm_runtime *runtime)
  98 {
  99         static unsigned int channels_list[] = { 2, 6 };
 100         static struct snd_pcm_hw_constraint_list channels_list_constraint = {
 101                 .count = 2,
 102                 .list = channels_list,
 103         };
 104         int err;
 105
 106         runtime->hw.rates = SNDRV_PCM_RATE_32000 |
 107                             SNDRV_PCM_RATE_44100 |
 108                             SNDRV_PCM_RATE_48000 |
 109                             SNDRV_PCM_RATE_96000;
 110         runtime->hw.channels_max = 6;
 111
 112         err = snd_pcm_hw_constraint_list(runtime, 0,
 113                                          SNDRV_PCM_HW_PARAM_CHANNELS,
 114                                          &channels_list_constraint);
 115         if (err < 0)
 116                 return err;
 117         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
 118                                   firewave_rate_constraint, NULL,
 119                                   SNDRV_PCM_HW_PARAM_CHANNELS, -1);
 120         if (err < 0)
 121                 return err;
 122         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
 123                                   firewave_channels_constraint, NULL,
 124                                   SNDRV_PCM_HW_PARAM_RATE, -1);
 125         if (err < 0)
 126                 return err;
 127
 128         return 0;
 129 }
 130
 131 static int lacie_speakers_constraints(struct snd_pcm_runtime *runtime)
 132 {
 133         runtime->hw.rates = SNDRV_PCM_RATE_32000 |
 134                             SNDRV_PCM_RATE_44100 |
 135                             SNDRV_PCM_RATE_48000 |
 136                             SNDRV_PCM_RATE_88200 |
 137                             SNDRV_PCM_RATE_96000;
 138
 139         return 0;
 140 }
 141
 142 static int fwspk_open(struct snd_pcm_substream *substream)
 143 {
 144         static const struct snd_pcm_hardware hardware = {
 145                 .info = SNDRV_PCM_INFO_MMAP |
 146                         SNDRV_PCM_INFO_MMAP_VALID |
 147                         SNDRV_PCM_INFO_BATCH |
 148                         SNDRV_PCM_INFO_INTERLEAVED |
 149                         SNDRV_PCM_INFO_BLOCK_TRANSFER,
 150                 .formats = AMDTP_OUT_PCM_FORMAT_BITS,
 151                 .channels_min = 2,
 152                 .channels_max = 2,
 153                 .buffer_bytes_max = 4 * 1024 * 1024,
 154                 .period_bytes_min = 1,
 155                 .period_bytes_max = UINT_MAX,
 156                 .periods_min = 1,
 157                 .periods_max = UINT_MAX,
 158         };
 159         struct fwspk *fwspk = substream->private_data;
 160         struct snd_pcm_runtime *runtime = substream->runtime;
 161         int err;
 162
 163         runtime->hw = hardware;
 164
 165         err = fwspk->device_info->pcm_constraints(runtime);
 166         if (err < 0)
 167                 return err;
 168         err = snd_pcm_limit_hw_rates(runtime);
 169         if (err < 0)
 170                 return err;
 171
 172         err = snd_pcm_hw_constraint_minmax(runtime,
 173                                            SNDRV_PCM_HW_PARAM_PERIOD_TIME,
 174                                            5000, UINT_MAX);
 175         if (err < 0)
 176                 return err;
 177
 178         err = snd_pcm_hw_constraint_msbits(runtime, 0, 32, 24);
 179         if (err < 0)
 180                 return err;
 181
 182         return 0;
 183 }
 184
 185 static int fwspk_close(struct snd_pcm_substream *substream)
 186 {
 187         return 0;
 188 }
 189
 190 static void fwspk_stop_stream(struct fwspk *fwspk)
 191 {
 192         if (fwspk->stream_running) {
 193                 amdtp_out_stream_stop(&fwspk->stream);
 194                 cmp_connection_break(&fwspk->connection);
 195                 fwspk->stream_running = false;
 196         }
 197 }
 198
 199 static int fwspk_set_rate(struct fwspk *fwspk, unsigned int sfc)
 200 {
 201         u8 *buf;
 202         int err;
 203
 204         buf = kmalloc(8, GFP_KERNEL);
 205         if (!buf)
 206                 return -ENOMEM;
 207
 208         buf[0] = 0x00;          /* AV/C, CONTROL */
 209         buf[1] = 0xff;          /* unit */
 210         buf[2] = 0x19;          /* INPUT PLUG SIGNAL FORMAT */
 211         buf[3] = 0x00;          /* plug 0 */
 212         buf[4] = 0x90;          /* format: audio */
 213         buf[5] = 0x00 | sfc;    /* AM824, frequency */
 214         buf[6] = 0xff;          /* SYT (not used) */
 215         buf[7] = 0xff;
 216
 217         err = fcp_avc_transaction(fwspk->unit, buf, 8, buf, 8,
 218                                   BIT(1) | BIT(2) | BIT(3) | BIT(4) | BIT(5));
 219         if (err < 0)
 220                 goto error;
 221         if (err < 6 || buf[0] != 0x09 /* ACCEPTED */) {
 222                 dev_err(&fwspk->unit->device, "failed to set sample rate\n");
 223                 err = -EIO;
 224                 goto error;
 225         }
 226
 227         err = 0;
 228
 229 error:
 230         kfree(buf);
 231
 232         return err;
 233 }
 234
 235 static int fwspk_hw_params(struct snd_pcm_substream *substream,
 236                            struct snd_pcm_hw_params *hw_params)
 237 {
 238         struct fwspk *fwspk = substream->private_data;
 239         int err;
 240
 241         mutex_lock(&fwspk->mutex);
 242         fwspk_stop_stream(fwspk);
 243         mutex_unlock(&fwspk->mutex);
 244
 245         err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
 246                                                params_buffer_bytes(hw_params));
 247         if (err < 0)
 248                 goto error;
 249
 250         amdtp_out_stream_set_rate(&fwspk->stream, params_rate(hw_params));
 251         amdtp_out_stream_set_pcm(&fwspk->stream, params_channels(hw_params));
 252
 253         amdtp_out_stream_set_pcm_format(&fwspk->stream,
 254                                         params_format(hw_params));
 255
 256         err = fwspk_set_rate(fwspk, fwspk->stream.sfc);
 257         if (err < 0)
 258                 goto err_buffer;
 259
 260         return 0;
 261
 262 err_buffer:
 263         snd_pcm_lib_free_vmalloc_buffer(substream);
 264 error:
 265         return err;
 266 }
 267
 268 static int fwspk_hw_free(struct snd_pcm_substream *substream)
 269 {
 270         struct fwspk *fwspk = substream->private_data;
 271
 272         mutex_lock(&fwspk->mutex);
 273         fwspk_stop_stream(fwspk);
 274         mutex_unlock(&fwspk->mutex);
 275
 276         return snd_pcm_lib_free_vmalloc_buffer(substream);
 277 }
 278
 279 static int fwspk_prepare(struct snd_pcm_substream *substream)
 280 {
 281         struct fwspk *fwspk = substream->private_data;
 282         int err;
 283
 284         mutex_lock(&fwspk->mutex);
 285
 286         if (amdtp_out_streaming_error(&fwspk->stream))
 287                 fwspk_stop_stream(fwspk);
 288
 289         if (!fwspk->stream_running) {
 290                 err = cmp_connection_establish(&fwspk->connection,
 291                         amdtp_out_stream_get_max_payload(&fwspk->stream));
 292                 if (err < 0)
 293                         goto err_mutex;
 294
 295                 err = amdtp_out_stream_start(&fwspk->stream,
 296                                         fwspk->connection.resources.channel,
 297                                         fwspk->connection.speed);
 298                 if (err < 0)
 299                         goto err_connection;
 300
 301                 fwspk->stream_running = true;
 302         }
 303
 304         mutex_unlock(&fwspk->mutex);
 305
 306         amdtp_out_stream_pcm_prepare(&fwspk->stream);
 307
 308         return 0;
 309
 310 err_connection:
 311         cmp_connection_break(&fwspk->connection);
 312 err_mutex:
 313         mutex_unlock(&fwspk->mutex);
 314
 315         return err;
 316 }
 317
 318 static int fwspk_trigger(struct snd_pcm_substream *substream, int cmd)
 319 {
 320         struct fwspk *fwspk = substream->private_data;
 321         struct snd_pcm_substream *pcm;
 322
 323         switch (cmd) {
 324         case SNDRV_PCM_TRIGGER_START:
 325                 pcm = substream;
 326                 break;
 327         case SNDRV_PCM_TRIGGER_STOP:
 328                 pcm = NULL;
 329                 break;
 330         default:
 331                 return -EINVAL;
 332         }
 333         amdtp_out_stream_pcm_trigger(&fwspk->stream, pcm);
 334         return 0;
 335 }
 336
 337 static snd_pcm_uframes_t fwspk_pointer(struct snd_pcm_substream *substream)
 338 {
 339         struct fwspk *fwspk = substream->private_data;
 340
 341         return amdtp_out_stream_pcm_pointer(&fwspk->stream);
 342 }
 343
 344 static int fwspk_create_pcm(struct fwspk *fwspk)
 345 {
 346         static struct snd_pcm_ops ops = {
 347                 .open      = fwspk_open,
 348                 .close     = fwspk_close,
 349                 .ioctl     = snd_pcm_lib_ioctl,
 350                 .hw_params = fwspk_hw_params,
 351                 .hw_free   = fwspk_hw_free,
 352                 .prepare   = fwspk_prepare,
 353                 .trigger   = fwspk_trigger,
 354                 .pointer   = fwspk_pointer,
 355                 .page      = snd_pcm_lib_get_vmalloc_page,
 356                 .mmap      = snd_pcm_lib_mmap_vmalloc,
 357         };
 358         struct snd_pcm *pcm;
 359         int err;
 360
 361         err = snd_pcm_new(fwspk->card, "OXFW970", 0, 1, 0, &pcm);
 362         if (err < 0)
 363                 return err;
 364         pcm->private_data = fwspk;
 365         strcpy(pcm->name, fwspk->device_info->short_name);
 366         fwspk->pcm = pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream;
 367         fwspk->pcm->ops = &ops;
 368         return 0;
 369 }
 370
 371 enum control_action { CTL_READ, CTL_WRITE };
 372 enum control_attribute {
 373         CTL_MIN         = 0x02,
 374         CTL_MAX         = 0x03,
 375         CTL_CURRENT     = 0x10,
 376 };
 377
 378 static int fwspk_mute_command(struct fwspk *fwspk, bool *value,
 379                               enum control_action action)
 380 {
 381         u8 *buf;
 382         u8 response_ok;
 383         int err;
 384
 385         buf = kmalloc(11, GFP_KERNEL);
 386         if (!buf)
 387                 return -ENOMEM;
 388
 389         if (action == CTL_READ) {
 390                 buf[0] = 0x01;          /* AV/C, STATUS */
 391                 response_ok = 0x0c;     /*       STABLE */
 392         } else {
 393                 buf[0] = 0x00;          /* AV/C, CONTROL */
 394                 response_ok = 0x09;     /*       ACCEPTED */
 395         }
 396         buf[1] = 0x08;                  /* audio unit 0 */
 397         buf[2] = 0xb8;                  /* FUNCTION BLOCK */
 398         buf[3] = 0x81;                  /* function block type: feature */
 399         buf[4] = fwspk->device_info->mute_fb_id; /* function block ID */
 400         buf[5] = 0x10;                  /* control attribute: current */
 401         buf[6] = 0x02;                  /* selector length */
 402         buf[7] = 0x00;                  /* audio channel number */
 403         buf[8] = 0x01;                  /* control selector: mute */
 404         buf[9] = 0x01;                  /* control data length */
 405         if (action == CTL_READ)
 406                 buf[10] = 0xff;
 407         else
 408                 buf[10] = *value ? 0x70 : 0x60;
 409
 410         err = fcp_avc_transaction(fwspk->unit, buf, 11, buf, 11, 0x3fe);
 411         if (err < 0)
 412                 goto error;
 413         if (err < 11) {
 414                 dev_err(&fwspk->unit->device, "short FCP response\n");
 415                 err = -EIO;
 416                 goto error;
 417         }
 418         if (buf[0] != response_ok) {
 419                 dev_err(&fwspk->unit->device, "mute command failed\n");
 420                 err = -EIO;
 421                 goto error;
 422         }
 423         if (action == CTL_READ)
 424                 *value = buf[10] == 0x70;
 425
 426         err = 0;
 427
 428 error:
 429         kfree(buf);
 430
 431         return err;
 432 }
 433
 434 static int fwspk_volume_command(struct fwspk *fwspk, s16 *value,
 435                                 unsigned int channel,
 436                                 enum control_attribute attribute,
 437                                 enum control_action action)
 438 {
 439         u8 *buf;
 440         u8 response_ok;
 441         int err;
 442
 443         buf = kmalloc(12, GFP_KERNEL);
 444         if (!buf)
 445                 return -ENOMEM;
 446
 447         if (action == CTL_READ) {
 448                 buf[0] = 0x01;          /* AV/C, STATUS */
 449                 response_ok = 0x0c;     /*       STABLE */
 450         } else {
 451                 buf[0] = 0x00;          /* AV/C, CONTROL */
 452                 response_ok = 0x09;     /*       ACCEPTED */
 453         }
 454         buf[1] = 0x08;                  /* audio unit 0 */
 455         buf[2] = 0xb8;                  /* FUNCTION BLOCK */
 456         buf[3] = 0x81;                  /* function block type: feature */
 457         buf[4] = fwspk->device_info->volume_fb_id; /* function block ID */
 458         buf[5] = attribute;             /* control attribute */
 459         buf[6] = 0x02;                  /* selector length */
 460         buf[7] = channel;               /* audio channel number */
 461         buf[8] = 0x02;                  /* control selector: volume */
 462         buf[9] = 0x02;                  /* control data length */
 463         if (action == CTL_READ) {
 464                 buf[10] = 0xff;
 465                 buf[11] = 0xff;
 466         } else {
 467                 buf[10] = *value >> 8;
 468                 buf[11] = *value;
 469         }
 470
 471         err = fcp_avc_transaction(fwspk->unit, buf, 12, buf, 12, 0x3fe);
 472         if (err < 0)
 473                 goto error;
 474         if (err < 12) {
 475                 dev_err(&fwspk->unit->device, "short FCP response\n");
 476                 err = -EIO;
 477                 goto error;
 478         }
 479         if (buf[0] != response_ok) {
 480                 dev_err(&fwspk->unit->device, "volume command failed\n");
 481                 err = -EIO;
 482                 goto error;
 483         }
 484         if (action == CTL_READ)
 485                 *value = (buf[10] << 8) | buf[11];
 486
 487         err = 0;
 488
 489 error:
 490         kfree(buf);
 491
 492         return err;
 493 }
 494
 495 static int fwspk_mute_get(struct snd_kcontrol *control,
 496                           struct snd_ctl_elem_value *value)
 497 {
 498         struct fwspk *fwspk = control->private_data;
 499
 500         value->value.integer.value[0] = !fwspk->mute;
 501
 502         return 0;
 503 }
 504
 505 static int fwspk_mute_put(struct snd_kcontrol *control,
 506                           struct snd_ctl_elem_value *value)
 507 {
 508         struct fwspk *fwspk = control->private_data;
 509         bool mute;
 510         int err;
 511
 512         mute = !value->value.integer.value[0];
 513
 514         if (mute == fwspk->mute)
 515                 return 0;
 516
 517         err = fwspk_mute_command(fwspk, &mute, CTL_WRITE);
 518         if (err < 0)
 519                 return err;
 520         fwspk->mute = mute;
 521
 522         return 1;
 523 }
 524
 525 static int fwspk_volume_info(struct snd_kcontrol *control,
 526                              struct snd_ctl_elem_info *info)
 527 {
 528         struct fwspk *fwspk = control->private_data;
 529
 530         info->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 531         info->count = fwspk->device_info->mixer_channels;
 532         info->value.integer.min = fwspk->volume_min;
 533         info->value.integer.max = fwspk->volume_max;
 534
 535         return 0;
 536 }
 537
 538 static const u8 channel_map[6] = { 0, 1, 4, 5, 2, 3 };
 539
 540 static int fwspk_volume_get(struct snd_kcontrol *control,
 541                             struct snd_ctl_elem_value *value)
 542 {
 543         struct fwspk *fwspk = control->private_data;
 544         unsigned int i;
 545
 546         for (i = 0; i < fwspk->device_info->mixer_channels; ++i)
 547                 value->value.integer.value[channel_map[i]] = fwspk->volume[i];
 548
 549         return 0;
 550 }
 551
 552 static int fwspk_volume_put(struct snd_kcontrol *control,
 553                           struct snd_ctl_elem_value *value)
 554 {
 555         struct fwspk *fwspk = control->private_data;
 556         unsigned int i, changed_channels;
 557         bool equal_values = true;
 558         s16 volume;
 559         int err;
 560
 561         for (i = 0; i < fwspk->device_info->mixer_channels; ++i) {
 562                 if (value->value.integer.value[i] < fwspk->volume_min ||
 563                     value->value.integer.value[i] > fwspk->volume_max)
 564                         return -EINVAL;
 565                 if (value->value.integer.value[i] !=
 566                     value->value.integer.value[0])
 567                         equal_values = false;
 568         }
 569
 570         changed_channels = 0;
 571         for (i = 0; i < fwspk->device_info->mixer_channels; ++i)
 572                 if (value->value.integer.value[channel_map[i]] !=
 573                                                         fwspk->volume[i])
 574                         changed_channels |= 1 << (i + 1);
 575
 576         if (equal_values && changed_channels != 0)
 577                 changed_channels = 1 << 0;
 578
 579         for (i = 0; i <= fwspk->device_info->mixer_channels; ++i) {
 580                 volume = value->value.integer.value[channel_map[i ? i - 1 : 0]];
 581                 if (changed_channels & (1 << i)) {
 582                         err = fwspk_volume_command(fwspk, &volume, i,
 583                                                    CTL_CURRENT, CTL_WRITE);
 584                         if (err < 0)
 585                                 return err;
 586                 }
 587                 if (i > 0)
 588                         fwspk->volume[i - 1] = volume;
 589         }
 590
 591         return changed_channels != 0;
 592 }
 593
 594 static int fwspk_create_mixer(struct fwspk *fwspk)
 595 {
 596         static const struct snd_kcontrol_new controls[] = {
 597                 {
 598                         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 599                         .name = "PCM Playback Switch",
 600                         .info = snd_ctl_boolean_mono_info,
 601                         .get = fwspk_mute_get,
 602                         .put = fwspk_mute_put,
 603                 },
 604                 {
 605                         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 606                         .name = "PCM Playback Volume",
 607                         .info = fwspk_volume_info,
 608                         .get = fwspk_volume_get,
 609                         .put = fwspk_volume_put,
 610                 },
 611         };
 612         unsigned int i, first_ch;
 613         int err;
 614
 615         err = fwspk_volume_command(fwspk, &fwspk->volume_min,
 616                                    0, CTL_MIN, CTL_READ);
 617         if (err < 0)
 618                 return err;
 619         err = fwspk_volume_command(fwspk, &fwspk->volume_max,
 620                                    0, CTL_MAX, CTL_READ);
 621         if (err < 0)
 622                 return err;
 623
 624         err = fwspk_mute_command(fwspk, &fwspk->mute, CTL_READ);
 625         if (err < 0)
 626                 return err;
 627
 628         first_ch = fwspk->device_info->mixer_channels == 1 ? 0 : 1;
 629         for (i = 0; i < fwspk->device_info->mixer_channels; ++i) {
 630                 err = fwspk_volume_command(fwspk, &fwspk->volume[i],
 631                                            first_ch + i, CTL_CURRENT, CTL_READ);
 632                 if (err < 0)
 633                         return err;
 634         }
 635
 636         for (i = 0; i < ARRAY_SIZE(controls); ++i) {
 637                 err = snd_ctl_add(fwspk->card,
 638                                   snd_ctl_new1(&controls[i], fwspk));
 639                 if (err < 0)
 640                         return err;
 641         }
 642
 643         return 0;
 644 }
 645
 646 static u32 fwspk_read_firmware_version(struct fw_unit *unit)
 647 {
 648         __be32 data;
 649         int err;
 650
 651         err = snd_fw_transaction(unit, TCODE_READ_QUADLET_REQUEST,
 652                                  OXFORD_FIRMWARE_ID_ADDRESS, &data, 4);
 653         return err >= 0 ? be32_to_cpu(data) : 0;
 654 }
 655
 656 static void fwspk_card_free(struct snd_card *card)
 657 {
 658         struct fwspk *fwspk = card->private_data;
 659         struct fw_device *dev = fw_parent_device(fwspk->unit);
 660
 661         amdtp_out_stream_destroy(&fwspk->stream);
 662         cmp_connection_destroy(&fwspk->connection);
 663         fw_unit_put(fwspk->unit);
 664         fw_device_put(dev);
 665         mutex_destroy(&fwspk->mutex);
 666 }
 667
 668 static const struct device_info *__devinit fwspk_detect(struct fw_device *dev)
 669 {
 670         static const struct device_info griffin_firewave = {
 671                 .driver_name = "FireWave",
 672                 .short_name  = "FireWave",
 673                 .long_name   = "Griffin FireWave Surround",
 674                 .pcm_constraints = firewave_constraints,
 675                 .mixer_channels = 6,
 676                 .mute_fb_id   = 0x01,
 677                 .volume_fb_id = 0x02,
 678         };
 679         static const struct device_info lacie_speakers = {
 680                 .driver_name = "FWSpeakers",
 681                 .short_name  = "FireWire Speakers",
 682                 .long_name   = "LaCie FireWire Speakers",
 683                 .pcm_constraints = lacie_speakers_constraints,
 684                 .mixer_channels = 1,
 685                 .mute_fb_id   = 0x01,
 686                 .volume_fb_id = 0x01,
 687         };
 688         struct fw_csr_iterator i;
 689         int key, value;
 690
 691         fw_csr_iterator_init(&i, dev->config_rom);
 692         while (fw_csr_iterator_next(&i, &key, &value))
 693                 if (key == CSR_VENDOR)
 694                         switch (value) {
 695                         case VENDOR_GRIFFIN:
 696                                 return &griffin_firewave;
 697                         case VENDOR_LACIE:
 698                                 return &lacie_speakers;
 699                         }
 700
 701         return NULL;
 702 }
 703
 704 static int __devinit fwspk_probe(struct device *unit_dev)
 705 {
 706         struct fw_unit *unit = fw_unit(unit_dev);
 707         struct fw_device *fw_dev = fw_parent_device(unit);
 708         struct snd_card *card;
 709         struct fwspk *fwspk;
 710         u32 firmware;
 711         int err;
 712
 713         err = snd_card_create(-1, NULL, THIS_MODULE, sizeof(*fwspk), &card);
 714         if (err < 0)
 715                 return err;
 716         snd_card_set_dev(card, unit_dev);
 717
 718         fwspk = card->private_data;
 719         fwspk->card = card;
 720         mutex_init(&fwspk->mutex);
 721         fw_device_get(fw_dev);
 722         fwspk->unit = fw_unit_get(unit);
 723         fwspk->device_info = fwspk_detect(fw_dev);
 724         if (!fwspk->device_info) {
 725                 err = -ENODEV;
 726                 goto err_unit;
 727         }
 728
 729         err = cmp_connection_init(&fwspk->connection, unit, 0);
 730         if (err < 0)
 731                 goto err_unit;
 732
 733         err = amdtp_out_stream_init(&fwspk->stream, unit, CIP_NONBLOCKING);
 734         if (err < 0)
 735                 goto err_connection;
 736
 737         card->private_free = fwspk_card_free;
 738
 739         strcpy(card->driver, fwspk->device_info->driver_name);
 740         strcpy(card->shortname, fwspk->device_info->short_name);
 741         firmware = fwspk_read_firmware_version(unit);
 742         snprintf(card->longname, sizeof(card->longname),
 743                  "%s (OXFW%x %04x), GUID %08x%08x at %s, S%d",
 744                  fwspk->device_info->long_name,
 745                  firmware >> 20, firmware & 0xffff,
 746                  fw_dev->config_rom[3], fw_dev->config_rom[4],
 747                  dev_name(&unit->device), 100 << fw_dev->max_speed);
 748         strcpy(card->mixername, "OXFW970");
 749
 750         err = fwspk_create_pcm(fwspk);
 751         if (err < 0)
 752                 goto error;
 753
 754         err = fwspk_create_mixer(fwspk);
 755         if (err < 0)
 756                 goto error;
 757
 758         err = snd_card_register(card);
 759         if (err < 0)
 760                 goto error;
 761
 762         dev_set_drvdata(unit_dev, fwspk);
 763
 764         return 0;
 765
 766 err_connection:
 767         cmp_connection_destroy(&fwspk->connection);
 768 err_unit:
 769         fw_unit_put(fwspk->unit);
 770         fw_device_put(fw_dev);
 771         mutex_destroy(&fwspk->mutex);
 772 error:
 773         snd_card_free(card);
 774         return err;
 775 }
 776
 777 static int __devexit fwspk_remove(struct device *dev)
 778 {
 779         struct fwspk *fwspk = dev_get_drvdata(dev);
 780
 781         amdtp_out_stream_pcm_abort(&fwspk->stream);
 782         snd_card_disconnect(fwspk->card);
 783
 784         mutex_lock(&fwspk->mutex);
 785         fwspk_stop_stream(fwspk);
 786         mutex_unlock(&fwspk->mutex);
 787
 788         snd_card_free_when_closed(fwspk->card);
 789
 790         return 0;
 791 }
 792
 793 static void fwspk_bus_reset(struct fw_unit *unit)
 794 {
 795         struct fwspk *fwspk = dev_get_drvdata(&unit->device);
 796
 797         fcp_bus_reset(fwspk->unit);
 798
 799         if (cmp_connection_update(&fwspk->connection) < 0) {
 800                 amdtp_out_stream_pcm_abort(&fwspk->stream);
 801                 mutex_lock(&fwspk->mutex);
 802                 fwspk_stop_stream(fwspk);
 803                 mutex_unlock(&fwspk->mutex);
 804                 return;
 805         }
 806
 807         amdtp_out_stream_update(&fwspk->stream);
 808 }
 809
 810 static const struct ieee1394_device_id fwspk_id_table[] = {
 811         {
 812                 .match_flags  = IEEE1394_MATCH_VENDOR_ID |
 813                                 IEEE1394_MATCH_MODEL_ID |
 814                                 IEEE1394_MATCH_SPECIFIER_ID |
 815                                 IEEE1394_MATCH_VERSION,
 816                 .vendor_id    = VENDOR_GRIFFIN,
 817                 .model_id     = 0x00f970,
 818                 .specifier_id = SPECIFIER_1394TA,
 819                 .version      = VERSION_AVC,
 820         },
 821         {
 822                 .match_flags  = IEEE1394_MATCH_VENDOR_ID |
 823                                 IEEE1394_MATCH_MODEL_ID |
 824                                 IEEE1394_MATCH_SPECIFIER_ID |
 825                                 IEEE1394_MATCH_VERSION,
 826                 .vendor_id    = VENDOR_LACIE,
 827                 .model_id     = 0x00f970,
 828                 .specifier_id = SPECIFIER_1394TA,
 829                 .version      = VERSION_AVC,
 830         },
 831         { }
 832 };
 833 MODULE_DEVICE_TABLE(ieee1394, fwspk_id_table);
 834
 835 static struct fw_driver fwspk_driver = {
 836         .driver   = {
 837                 .owner  = THIS_MODULE,
 838                 .name   = KBUILD_MODNAME,
 839                 .bus    = &fw_bus_type,
 840                 .probe  = fwspk_probe,
 841                 .remove = __devexit_p(fwspk_remove),
 842         },
 843         .update   = fwspk_bus_reset,
 844         .id_table = fwspk_id_table,
 845 };
 846
 847 static int __init alsa_fwspk_init(void)
 848 {
 849         return driver_register(&fwspk_driver.driver);
 850 }
 851
 852 static void __exit alsa_fwspk_exit(void)
 853 {
 854         driver_unregister(&fwspk_driver.driver);
 855 }
 856
 857 module_init(alsa_fwspk_init);
 858 module_exit(alsa_fwspk_exit);