sound/firewire/oxfw/oxfw-pcm.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * oxfw_pcm.c - a part of driver for OXFW970/971 based devices
   4  *
   5  * Copyright (c) Clemens Ladisch <clemens@ladisch.de>
   6  */
   7
   8 #include "oxfw.h"
   9
  10 static int hw_rule_rate(struct snd_pcm_hw_params *params,
  11                         struct snd_pcm_hw_rule *rule)
  12 {
  13         u8 **formats = rule->private;
  14         struct snd_interval *r =
  15                 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
  16         const struct snd_interval *c =
  17                 hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_CHANNELS);
  18         struct snd_interval t = {
  19                 .min = UINT_MAX, .max = 0, .integer = 1
  20         };
  21         struct snd_oxfw_stream_formation formation;
  22         int i, err;
  23
  24         for (i = 0; i < SND_OXFW_STREAM_FORMAT_ENTRIES; i++) {
  25                 if (formats[i] == NULL)
  26                         continue;
  27
  28                 err = snd_oxfw_stream_parse_format(formats[i], &formation);
  29                 if (err < 0)
  30                         continue;
  31                 if (!snd_interval_test(c, formation.pcm))
  32                         continue;
  33
  34                 t.min = min(t.min, formation.rate);
  35                 t.max = max(t.max, formation.rate);
  36
  37         }
  38         return snd_interval_refine(r, &t);
  39 }
  40
  41 static int hw_rule_channels(struct snd_pcm_hw_params *params,
  42                             struct snd_pcm_hw_rule *rule)
  43 {
  44         u8 **formats = rule->private;
  45         struct snd_interval *c =
  46                 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
  47         const struct snd_interval *r =
  48                 hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_RATE);
  49         struct snd_oxfw_stream_formation formation;
  50         int i, j, err;
  51         unsigned int count, list[SND_OXFW_STREAM_FORMAT_ENTRIES] = {0};
  52
  53         count = 0;
  54         for (i = 0; i < SND_OXFW_STREAM_FORMAT_ENTRIES; i++) {
  55                 if (formats[i] == NULL)
  56                         break;
  57
  58                 err = snd_oxfw_stream_parse_format(formats[i], &formation);
  59                 if (err < 0)
  60                         continue;
  61                 if (!snd_interval_test(r, formation.rate))
  62                         continue;
  63                 if (list[count] == formation.pcm)
  64                         continue;
  65
  66                 for (j = 0; j < ARRAY_SIZE(list); j++) {
  67                         if (list[j] == formation.pcm)
  68                                 break;
  69                 }
  70                 if (j == ARRAY_SIZE(list)) {
  71                         list[count] = formation.pcm;
  72                         if (++count == ARRAY_SIZE(list))
  73                                 break;
  74                 }
  75         }
  76
  77         return snd_interval_list(c, count, list, 0);
  78 }
  79
  80 static void limit_channels_and_rates(struct snd_pcm_hardware *hw, u8 **formats)
  81 {
  82         struct snd_oxfw_stream_formation formation;
  83         int i, err;
  84
  85         hw->channels_min = UINT_MAX;
  86         hw->channels_max = 0;
  87
  88         hw->rate_min = UINT_MAX;
  89         hw->rate_max = 0;
  90         hw->rates = 0;
  91
  92         for (i = 0; i < SND_OXFW_STREAM_FORMAT_ENTRIES; i++) {
  93                 if (formats[i] == NULL)
  94                         break;
  95
  96                 err = snd_oxfw_stream_parse_format(formats[i], &formation);
  97                 if (err < 0)
  98                         continue;
  99
 100                 hw->channels_min = min(hw->channels_min, formation.pcm);
 101                 hw->channels_max = max(hw->channels_max, formation.pcm);
 102
 103                 hw->rate_min = min(hw->rate_min, formation.rate);
 104                 hw->rate_max = max(hw->rate_max, formation.rate);
 105                 hw->rates |= snd_pcm_rate_to_rate_bit(formation.rate);
 106         }
 107 }
 108
 109 static int init_hw_params(struct snd_oxfw *oxfw,
 110                           struct snd_pcm_substream *substream)
 111 {
 112         struct snd_pcm_runtime *runtime = substream->runtime;
 113         u8 **formats;
 114         struct amdtp_stream *stream;
 115         int err;
 116
 117         if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
 118                 runtime->hw.formats = AM824_IN_PCM_FORMAT_BITS;
 119                 stream = &oxfw->tx_stream;
 120                 formats = oxfw->tx_stream_formats;
 121         } else {
 122                 runtime->hw.formats = AM824_OUT_PCM_FORMAT_BITS;
 123                 stream = &oxfw->rx_stream;
 124                 formats = oxfw->rx_stream_formats;
 125         }
 126
 127         limit_channels_and_rates(&runtime->hw, formats);
 128
 129         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
 130                                   hw_rule_channels, formats,
 131                                   SNDRV_PCM_HW_PARAM_RATE, -1);
 132         if (err < 0)
 133                 goto end;
 134
 135         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
 136                                   hw_rule_rate, formats,
 137                                   SNDRV_PCM_HW_PARAM_CHANNELS, -1);
 138         if (err < 0)
 139                 goto end;
 140
 141         err = amdtp_am824_add_pcm_hw_constraints(stream, runtime);
 142 end:
 143         return err;
 144 }
 145
 146 static int limit_to_current_params(struct snd_pcm_substream *substream)
 147 {
 148         struct snd_oxfw *oxfw = substream->private_data;
 149         struct snd_oxfw_stream_formation formation;
 150         enum avc_general_plug_dir dir;
 151         int err;
 152
 153         if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
 154                 dir = AVC_GENERAL_PLUG_DIR_OUT;
 155         else
 156                 dir = AVC_GENERAL_PLUG_DIR_IN;
 157
 158         err = snd_oxfw_stream_get_current_formation(oxfw, dir, &formation);
 159         if (err < 0)
 160                 goto end;
 161
 162         substream->runtime->hw.channels_min = formation.pcm;
 163         substream->runtime->hw.channels_max = formation.pcm;
 164         substream->runtime->hw.rate_min = formation.rate;
 165         substream->runtime->hw.rate_max = formation.rate;
 166 end:
 167         return err;
 168 }
 169
 170 static int pcm_open(struct snd_pcm_substream *substream)
 171 {
 172         struct snd_oxfw *oxfw = substream->private_data;
 173         struct amdtp_domain *d = &oxfw->domain;
 174         int err;
 175
 176         err = snd_oxfw_stream_lock_try(oxfw);
 177         if (err < 0)
 178                 return err;
 179
 180         err = init_hw_params(oxfw, substream);
 181         if (err < 0)
 182                 goto err_locked;
 183
 184         mutex_lock(&oxfw->mutex);
 185
 186         // When source of clock is not internal or any stream is reserved for
 187         // transmission of PCM frames, the available sampling rate is limited
 188         // at current one.
 189         if (oxfw->substreams_count > 0 && d->events_per_period > 0) {
 190                 unsigned int frames_per_period = d->events_per_period;
 191                 unsigned int frames_per_buffer = d->events_per_buffer;
 192
 193                 err = limit_to_current_params(substream);
 194                 if (err < 0) {
 195                         mutex_unlock(&oxfw->mutex);
 196                         goto err_locked;
 197                 }
 198
 199                 if (frames_per_period > 0) {
 200                         err = snd_pcm_hw_constraint_minmax(substream->runtime,
 201                                         SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
 202                                         frames_per_period, frames_per_period);
 203                         if (err < 0) {
 204                                 mutex_unlock(&oxfw->mutex);
 205                                 goto err_locked;
 206                         }
 207
 208                         err = snd_pcm_hw_constraint_minmax(substream->runtime,
 209                                         SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
 210                                         frames_per_buffer, frames_per_buffer);
 211                         if (err < 0) {
 212                                 mutex_unlock(&oxfw->mutex);
 213                                 goto err_locked;
 214                         }
 215                 }
 216         }
 217
 218         mutex_unlock(&oxfw->mutex);
 219
 220         snd_pcm_set_sync(substream);
 221
 222         return 0;
 223 err_locked:
 224         snd_oxfw_stream_lock_release(oxfw);
 225         return err;
 226 }
 227
 228 static int pcm_close(struct snd_pcm_substream *substream)
 229 {
 230         struct snd_oxfw *oxfw = substream->private_data;
 231
 232         snd_oxfw_stream_lock_release(oxfw);
 233         return 0;
 234 }
 235
 236 static int pcm_capture_hw_params(struct snd_pcm_substream *substream,
 237                                  struct snd_pcm_hw_params *hw_params)
 238 {
 239         struct snd_oxfw *oxfw = substream->private_data;
 240         int err;
 241
 242         err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
 243         if (err < 0)
 244                 return err;
 245
 246         if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
 247                 unsigned int rate = params_rate(hw_params);
 248                 unsigned int channels = params_channels(hw_params);
 249                 unsigned int frames_per_period = params_period_size(hw_params);
 250                 unsigned int frames_per_buffer = params_buffer_size(hw_params);
 251
 252                 mutex_lock(&oxfw->mutex);
 253                 err = snd_oxfw_stream_reserve_duplex(oxfw, &oxfw->tx_stream,
 254                                         rate, channels, frames_per_period,
 255                                         frames_per_buffer);
 256                 if (err >= 0)
 257                         ++oxfw->substreams_count;
 258                 mutex_unlock(&oxfw->mutex);
 259         }
 260
 261         return err;
 262 }
 263 static int pcm_playback_hw_params(struct snd_pcm_substream *substream,
 264                                   struct snd_pcm_hw_params *hw_params)
 265 {
 266         struct snd_oxfw *oxfw = substream->private_data;
 267         int err;
 268
 269         err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
 270         if (err < 0)
 271                 return err;
 272
 273         if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
 274                 unsigned int rate = params_rate(hw_params);
 275                 unsigned int channels = params_channels(hw_params);
 276                 unsigned int frames_per_period = params_period_size(hw_params);
 277                 unsigned int frames_per_buffer = params_buffer_size(hw_params);
 278
 279                 mutex_lock(&oxfw->mutex);
 280                 err = snd_oxfw_stream_reserve_duplex(oxfw, &oxfw->rx_stream,
 281                                         rate, channels, frames_per_period,
 282                                         frames_per_buffer);
 283                 if (err >= 0)
 284                         ++oxfw->substreams_count;
 285                 mutex_unlock(&oxfw->mutex);
 286         }
 287
 288         return err;
 289 }
 290
 291 static int pcm_capture_hw_free(struct snd_pcm_substream *substream)
 292 {
 293         struct snd_oxfw *oxfw = substream->private_data;
 294
 295         mutex_lock(&oxfw->mutex);
 296
 297         if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
 298                 --oxfw->substreams_count;
 299
 300         snd_oxfw_stream_stop_duplex(oxfw);
 301
 302         mutex_unlock(&oxfw->mutex);
 303
 304         return snd_pcm_lib_free_pages(substream);
 305 }
 306 static int pcm_playback_hw_free(struct snd_pcm_substream *substream)
 307 {
 308         struct snd_oxfw *oxfw = substream->private_data;
 309
 310         mutex_lock(&oxfw->mutex);
 311
 312         if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
 313                 --oxfw->substreams_count;
 314
 315         snd_oxfw_stream_stop_duplex(oxfw);
 316
 317         mutex_unlock(&oxfw->mutex);
 318
 319         return snd_pcm_lib_free_pages(substream);
 320 }
 321
 322 static int pcm_capture_prepare(struct snd_pcm_substream *substream)
 323 {
 324         struct snd_oxfw *oxfw = substream->private_data;
 325         int err;
 326
 327         mutex_lock(&oxfw->mutex);
 328         err = snd_oxfw_stream_start_duplex(oxfw);
 329         mutex_unlock(&oxfw->mutex);
 330         if (err < 0)
 331                 goto end;
 332
 333         amdtp_stream_pcm_prepare(&oxfw->tx_stream);
 334 end:
 335         return err;
 336 }
 337 static int pcm_playback_prepare(struct snd_pcm_substream *substream)
 338 {
 339         struct snd_oxfw *oxfw = substream->private_data;
 340         int err;
 341
 342         mutex_lock(&oxfw->mutex);
 343         err = snd_oxfw_stream_start_duplex(oxfw);
 344         mutex_unlock(&oxfw->mutex);
 345         if (err < 0)
 346                 goto end;
 347
 348         amdtp_stream_pcm_prepare(&oxfw->rx_stream);
 349 end:
 350         return err;
 351 }
 352
 353 static int pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd)
 354 {
 355         struct snd_oxfw *oxfw = substream->private_data;
 356         struct snd_pcm_substream *pcm;
 357
 358         switch (cmd) {
 359         case SNDRV_PCM_TRIGGER_START:
 360                 pcm = substream;
 361                 break;
 362         case SNDRV_PCM_TRIGGER_STOP:
 363                 pcm = NULL;
 364                 break;
 365         default:
 366                 return -EINVAL;
 367         }
 368         amdtp_stream_pcm_trigger(&oxfw->tx_stream, pcm);
 369         return 0;
 370 }
 371 static int pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd)
 372 {
 373         struct snd_oxfw *oxfw = substream->private_data;
 374         struct snd_pcm_substream *pcm;
 375
 376         switch (cmd) {
 377         case SNDRV_PCM_TRIGGER_START:
 378                 pcm = substream;
 379                 break;
 380         case SNDRV_PCM_TRIGGER_STOP:
 381                 pcm = NULL;
 382                 break;
 383         default:
 384                 return -EINVAL;
 385         }
 386         amdtp_stream_pcm_trigger(&oxfw->rx_stream, pcm);
 387         return 0;
 388 }
 389
 390 static snd_pcm_uframes_t pcm_capture_pointer(struct snd_pcm_substream *sbstm)
 391 {
 392         struct snd_oxfw *oxfw = sbstm->private_data;
 393
 394         return amdtp_domain_stream_pcm_pointer(&oxfw->domain, &oxfw->tx_stream);
 395 }
 396 static snd_pcm_uframes_t pcm_playback_pointer(struct snd_pcm_substream *sbstm)
 397 {
 398         struct snd_oxfw *oxfw = sbstm->private_data;
 399
 400         return amdtp_domain_stream_pcm_pointer(&oxfw->domain, &oxfw->rx_stream);
 401 }
 402
 403 static int pcm_capture_ack(struct snd_pcm_substream *substream)
 404 {
 405         struct snd_oxfw *oxfw = substream->private_data;
 406
 407         return amdtp_domain_stream_pcm_ack(&oxfw->domain, &oxfw->tx_stream);
 408 }
 409
 410 static int pcm_playback_ack(struct snd_pcm_substream *substream)
 411 {
 412         struct snd_oxfw *oxfw = substream->private_data;
 413
 414         return amdtp_domain_stream_pcm_ack(&oxfw->domain, &oxfw->rx_stream);
 415 }
 416
 417 int snd_oxfw_create_pcm(struct snd_oxfw *oxfw)
 418 {
 419         static const struct snd_pcm_ops capture_ops = {
 420                 .open      = pcm_open,
 421                 .close     = pcm_close,
 422                 .ioctl     = snd_pcm_lib_ioctl,
 423                 .hw_params = pcm_capture_hw_params,
 424                 .hw_free   = pcm_capture_hw_free,
 425                 .prepare   = pcm_capture_prepare,
 426                 .trigger   = pcm_capture_trigger,
 427                 .pointer   = pcm_capture_pointer,
 428                 .ack       = pcm_capture_ack,
 429         };
 430         static const struct snd_pcm_ops playback_ops = {
 431                 .open      = pcm_open,
 432                 .close     = pcm_close,
 433                 .ioctl     = snd_pcm_lib_ioctl,
 434                 .hw_params = pcm_playback_hw_params,
 435                 .hw_free   = pcm_playback_hw_free,
 436                 .prepare   = pcm_playback_prepare,
 437                 .trigger   = pcm_playback_trigger,
 438                 .pointer   = pcm_playback_pointer,
 439                 .ack       = pcm_playback_ack,
 440         };
 441         struct snd_pcm *pcm;
 442         unsigned int cap = 0;
 443         int err;
 444
 445         if (oxfw->has_output)
 446                 cap = 1;
 447
 448         err = snd_pcm_new(oxfw->card, oxfw->card->driver, 0, 1, cap, &pcm);
 449         if (err < 0)
 450                 return err;
 451
 452         pcm->private_data = oxfw;
 453         strcpy(pcm->name, oxfw->card->shortname);
 454         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &playback_ops);
 455         if (cap > 0)
 456                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &capture_ops);
 457         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_VMALLOC,
 458                                               NULL, 0, 0);
 459
 460         return 0;
 461 }