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_alloc_vmalloc_buffer(substream,
 243                                                params_buffer_bytes(hw_params));
 244         if (err < 0)
 245                 return err;
 246
 247         if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
 248                 unsigned int rate = params_rate(hw_params);
 249                 unsigned int channels = params_channels(hw_params);
 250                 unsigned int frames_per_period = params_period_size(hw_params);
 251                 unsigned int frames_per_buffer = params_buffer_size(hw_params);
 252
 253                 mutex_lock(&oxfw->mutex);
 254                 err = snd_oxfw_stream_reserve_duplex(oxfw, &oxfw->tx_stream,
 255                                         rate, channels, frames_per_period,
 256                                         frames_per_buffer);
 257                 if (err >= 0)
 258                         ++oxfw->substreams_count;
 259                 mutex_unlock(&oxfw->mutex);
 260         }
 261
 262         return err;
 263 }
 264 static int pcm_playback_hw_params(struct snd_pcm_substream *substream,
 265                                   struct snd_pcm_hw_params *hw_params)
 266 {
 267         struct snd_oxfw *oxfw = substream->private_data;
 268         int err;
 269
 270         err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
 271                                                params_buffer_bytes(hw_params));
 272         if (err < 0)
 273                 return err;
 274
 275         if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
 276                 unsigned int rate = params_rate(hw_params);
 277                 unsigned int channels = params_channels(hw_params);
 278                 unsigned int frames_per_period = params_period_size(hw_params);
 279                 unsigned int frames_per_buffer = params_buffer_size(hw_params);
 280
 281                 mutex_lock(&oxfw->mutex);
 282                 err = snd_oxfw_stream_reserve_duplex(oxfw, &oxfw->rx_stream,
 283                                         rate, channels, frames_per_period,
 284                                         frames_per_buffer);
 285                 if (err >= 0)
 286                         ++oxfw->substreams_count;
 287                 mutex_unlock(&oxfw->mutex);
 288         }
 289
 290         return 0;
 291 }
 292
 293 static int pcm_capture_hw_free(struct snd_pcm_substream *substream)
 294 {
 295         struct snd_oxfw *oxfw = substream->private_data;
 296
 297         mutex_lock(&oxfw->mutex);
 298
 299         if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
 300                 --oxfw->substreams_count;
 301
 302         snd_oxfw_stream_stop_duplex(oxfw);
 303
 304         mutex_unlock(&oxfw->mutex);
 305
 306         return snd_pcm_lib_free_vmalloc_buffer(substream);
 307 }
 308 static int pcm_playback_hw_free(struct snd_pcm_substream *substream)
 309 {
 310         struct snd_oxfw *oxfw = substream->private_data;
 311
 312         mutex_lock(&oxfw->mutex);
 313
 314         if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
 315                 --oxfw->substreams_count;
 316
 317         snd_oxfw_stream_stop_duplex(oxfw);
 318
 319         mutex_unlock(&oxfw->mutex);
 320
 321         return snd_pcm_lib_free_vmalloc_buffer(substream);
 322 }
 323
 324 static int pcm_capture_prepare(struct snd_pcm_substream *substream)
 325 {
 326         struct snd_oxfw *oxfw = substream->private_data;
 327         int err;
 328
 329         mutex_lock(&oxfw->mutex);
 330         err = snd_oxfw_stream_start_duplex(oxfw);
 331         mutex_unlock(&oxfw->mutex);
 332         if (err < 0)
 333                 goto end;
 334
 335         amdtp_stream_pcm_prepare(&oxfw->tx_stream);
 336 end:
 337         return err;
 338 }
 339 static int pcm_playback_prepare(struct snd_pcm_substream *substream)
 340 {
 341         struct snd_oxfw *oxfw = substream->private_data;
 342         int err;
 343
 344         mutex_lock(&oxfw->mutex);
 345         err = snd_oxfw_stream_start_duplex(oxfw);
 346         mutex_unlock(&oxfw->mutex);
 347         if (err < 0)
 348                 goto end;
 349
 350         amdtp_stream_pcm_prepare(&oxfw->rx_stream);
 351 end:
 352         return err;
 353 }
 354
 355 static int pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd)
 356 {
 357         struct snd_oxfw *oxfw = substream->private_data;
 358         struct snd_pcm_substream *pcm;
 359
 360         switch (cmd) {
 361         case SNDRV_PCM_TRIGGER_START:
 362                 pcm = substream;
 363                 break;
 364         case SNDRV_PCM_TRIGGER_STOP:
 365                 pcm = NULL;
 366                 break;
 367         default:
 368                 return -EINVAL;
 369         }
 370         amdtp_stream_pcm_trigger(&oxfw->tx_stream, pcm);
 371         return 0;
 372 }
 373 static int pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd)
 374 {
 375         struct snd_oxfw *oxfw = substream->private_data;
 376         struct snd_pcm_substream *pcm;
 377
 378         switch (cmd) {
 379         case SNDRV_PCM_TRIGGER_START:
 380                 pcm = substream;
 381                 break;
 382         case SNDRV_PCM_TRIGGER_STOP:
 383                 pcm = NULL;
 384                 break;
 385         default:
 386                 return -EINVAL;
 387         }
 388         amdtp_stream_pcm_trigger(&oxfw->rx_stream, pcm);
 389         return 0;
 390 }
 391
 392 static snd_pcm_uframes_t pcm_capture_pointer(struct snd_pcm_substream *sbstm)
 393 {
 394         struct snd_oxfw *oxfw = sbstm->private_data;
 395
 396         return amdtp_domain_stream_pcm_pointer(&oxfw->domain, &oxfw->tx_stream);
 397 }
 398 static snd_pcm_uframes_t pcm_playback_pointer(struct snd_pcm_substream *sbstm)
 399 {
 400         struct snd_oxfw *oxfw = sbstm->private_data;
 401
 402         return amdtp_domain_stream_pcm_pointer(&oxfw->domain, &oxfw->rx_stream);
 403 }
 404
 405 static int pcm_capture_ack(struct snd_pcm_substream *substream)
 406 {
 407         struct snd_oxfw *oxfw = substream->private_data;
 408
 409         return amdtp_domain_stream_pcm_ack(&oxfw->domain, &oxfw->tx_stream);
 410 }
 411
 412 static int pcm_playback_ack(struct snd_pcm_substream *substream)
 413 {
 414         struct snd_oxfw *oxfw = substream->private_data;
 415
 416         return amdtp_domain_stream_pcm_ack(&oxfw->domain, &oxfw->rx_stream);
 417 }
 418
 419 int snd_oxfw_create_pcm(struct snd_oxfw *oxfw)
 420 {
 421         static const struct snd_pcm_ops capture_ops = {
 422                 .open      = pcm_open,
 423                 .close     = pcm_close,
 424                 .ioctl     = snd_pcm_lib_ioctl,
 425                 .hw_params = pcm_capture_hw_params,
 426                 .hw_free   = pcm_capture_hw_free,
 427                 .prepare   = pcm_capture_prepare,
 428                 .trigger   = pcm_capture_trigger,
 429                 .pointer   = pcm_capture_pointer,
 430                 .ack       = pcm_capture_ack,
 431                 .page      = snd_pcm_lib_get_vmalloc_page,
 432         };
 433         static const struct snd_pcm_ops playback_ops = {
 434                 .open      = pcm_open,
 435                 .close     = pcm_close,
 436                 .ioctl     = snd_pcm_lib_ioctl,
 437                 .hw_params = pcm_playback_hw_params,
 438                 .hw_free   = pcm_playback_hw_free,
 439                 .prepare   = pcm_playback_prepare,
 440                 .trigger   = pcm_playback_trigger,
 441                 .pointer   = pcm_playback_pointer,
 442                 .ack       = pcm_playback_ack,
 443                 .page      = snd_pcm_lib_get_vmalloc_page,
 444         };
 445         struct snd_pcm *pcm;
 446         unsigned int cap = 0;
 447         int err;
 448
 449         if (oxfw->has_output)
 450                 cap = 1;
 451
 452         err = snd_pcm_new(oxfw->card, oxfw->card->driver, 0, 1, cap, &pcm);
 453         if (err < 0)
 454                 return err;
 455
 456         pcm->private_data = oxfw;
 457         strcpy(pcm->name, oxfw->card->shortname);
 458         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &playback_ops);
 459         if (cap > 0)
 460                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &capture_ops);
 461
 462         return 0;
 463 }