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
 192                 err = limit_to_current_params(substream);
 193                 if (err < 0) {
 194                         mutex_unlock(&oxfw->mutex);
 195                         goto err_locked;
 196                 }
 197
 198                 if (frames_per_period > 0) {
 199                         err = snd_pcm_hw_constraint_minmax(substream->runtime,
 200                                         SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
 201                                         frames_per_period, frames_per_period);
 202                         if (err < 0) {
 203                                 mutex_unlock(&oxfw->mutex);
 204                                 goto err_locked;
 205                         }
 206                 }
 207         }
 208
 209         mutex_unlock(&oxfw->mutex);
 210
 211         snd_pcm_set_sync(substream);
 212
 213         return 0;
 214 err_locked:
 215         snd_oxfw_stream_lock_release(oxfw);
 216         return err;
 217 }
 218
 219 static int pcm_close(struct snd_pcm_substream *substream)
 220 {
 221         struct snd_oxfw *oxfw = substream->private_data;
 222
 223         snd_oxfw_stream_lock_release(oxfw);
 224         return 0;
 225 }
 226
 227 static int pcm_capture_hw_params(struct snd_pcm_substream *substream,
 228                                  struct snd_pcm_hw_params *hw_params)
 229 {
 230         struct snd_oxfw *oxfw = substream->private_data;
 231         int err;
 232
 233         err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
 234                                                params_buffer_bytes(hw_params));
 235         if (err < 0)
 236                 return err;
 237
 238         if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
 239                 unsigned int rate = params_rate(hw_params);
 240                 unsigned int channels = params_channels(hw_params);
 241                 unsigned int frames_per_period = params_period_size(hw_params);
 242
 243                 mutex_lock(&oxfw->mutex);
 244                 err = snd_oxfw_stream_reserve_duplex(oxfw, &oxfw->tx_stream,
 245                                         rate, channels, frames_per_period);
 246                 if (err >= 0)
 247                         ++oxfw->substreams_count;
 248                 mutex_unlock(&oxfw->mutex);
 249         }
 250
 251         return err;
 252 }
 253 static int pcm_playback_hw_params(struct snd_pcm_substream *substream,
 254                                   struct snd_pcm_hw_params *hw_params)
 255 {
 256         struct snd_oxfw *oxfw = substream->private_data;
 257         int err;
 258
 259         err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
 260                                                params_buffer_bytes(hw_params));
 261         if (err < 0)
 262                 return err;
 263
 264         if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
 265                 unsigned int rate = params_rate(hw_params);
 266                 unsigned int channels = params_channels(hw_params);
 267                 unsigned int frames_per_period = params_period_size(hw_params);
 268
 269                 mutex_lock(&oxfw->mutex);
 270                 err = snd_oxfw_stream_reserve_duplex(oxfw, &oxfw->rx_stream,
 271                                         rate, channels, frames_per_period);
 272                 if (err >= 0)
 273                         ++oxfw->substreams_count;
 274                 mutex_unlock(&oxfw->mutex);
 275         }
 276
 277         return 0;
 278 }
 279
 280 static int pcm_capture_hw_free(struct snd_pcm_substream *substream)
 281 {
 282         struct snd_oxfw *oxfw = substream->private_data;
 283
 284         mutex_lock(&oxfw->mutex);
 285
 286         if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
 287                 --oxfw->substreams_count;
 288
 289         snd_oxfw_stream_stop_duplex(oxfw);
 290
 291         mutex_unlock(&oxfw->mutex);
 292
 293         return snd_pcm_lib_free_vmalloc_buffer(substream);
 294 }
 295 static int pcm_playback_hw_free(struct snd_pcm_substream *substream)
 296 {
 297         struct snd_oxfw *oxfw = substream->private_data;
 298
 299         mutex_lock(&oxfw->mutex);
 300
 301         if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
 302                 --oxfw->substreams_count;
 303
 304         snd_oxfw_stream_stop_duplex(oxfw);
 305
 306         mutex_unlock(&oxfw->mutex);
 307
 308         return snd_pcm_lib_free_vmalloc_buffer(substream);
 309 }
 310
 311 static int pcm_capture_prepare(struct snd_pcm_substream *substream)
 312 {
 313         struct snd_oxfw *oxfw = substream->private_data;
 314         int err;
 315
 316         mutex_lock(&oxfw->mutex);
 317         err = snd_oxfw_stream_start_duplex(oxfw);
 318         mutex_unlock(&oxfw->mutex);
 319         if (err < 0)
 320                 goto end;
 321
 322         amdtp_stream_pcm_prepare(&oxfw->tx_stream);
 323 end:
 324         return err;
 325 }
 326 static int pcm_playback_prepare(struct snd_pcm_substream *substream)
 327 {
 328         struct snd_oxfw *oxfw = substream->private_data;
 329         int err;
 330
 331         mutex_lock(&oxfw->mutex);
 332         err = snd_oxfw_stream_start_duplex(oxfw);
 333         mutex_unlock(&oxfw->mutex);
 334         if (err < 0)
 335                 goto end;
 336
 337         amdtp_stream_pcm_prepare(&oxfw->rx_stream);
 338 end:
 339         return err;
 340 }
 341
 342 static int pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd)
 343 {
 344         struct snd_oxfw *oxfw = substream->private_data;
 345         struct snd_pcm_substream *pcm;
 346
 347         switch (cmd) {
 348         case SNDRV_PCM_TRIGGER_START:
 349                 pcm = substream;
 350                 break;
 351         case SNDRV_PCM_TRIGGER_STOP:
 352                 pcm = NULL;
 353                 break;
 354         default:
 355                 return -EINVAL;
 356         }
 357         amdtp_stream_pcm_trigger(&oxfw->tx_stream, pcm);
 358         return 0;
 359 }
 360 static int pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd)
 361 {
 362         struct snd_oxfw *oxfw = substream->private_data;
 363         struct snd_pcm_substream *pcm;
 364
 365         switch (cmd) {
 366         case SNDRV_PCM_TRIGGER_START:
 367                 pcm = substream;
 368                 break;
 369         case SNDRV_PCM_TRIGGER_STOP:
 370                 pcm = NULL;
 371                 break;
 372         default:
 373                 return -EINVAL;
 374         }
 375         amdtp_stream_pcm_trigger(&oxfw->rx_stream, pcm);
 376         return 0;
 377 }
 378
 379 static snd_pcm_uframes_t pcm_capture_pointer(struct snd_pcm_substream *sbstm)
 380 {
 381         struct snd_oxfw *oxfw = sbstm->private_data;
 382
 383         return amdtp_stream_pcm_pointer(&oxfw->tx_stream);
 384 }
 385 static snd_pcm_uframes_t pcm_playback_pointer(struct snd_pcm_substream *sbstm)
 386 {
 387         struct snd_oxfw *oxfw = sbstm->private_data;
 388
 389         return amdtp_stream_pcm_pointer(&oxfw->rx_stream);
 390 }
 391
 392 static int pcm_capture_ack(struct snd_pcm_substream *substream)
 393 {
 394         struct snd_oxfw *oxfw = substream->private_data;
 395
 396         return amdtp_stream_pcm_ack(&oxfw->tx_stream);
 397 }
 398
 399 static int pcm_playback_ack(struct snd_pcm_substream *substream)
 400 {
 401         struct snd_oxfw *oxfw = substream->private_data;
 402
 403         return amdtp_stream_pcm_ack(&oxfw->rx_stream);
 404 }
 405
 406 int snd_oxfw_create_pcm(struct snd_oxfw *oxfw)
 407 {
 408         static const struct snd_pcm_ops capture_ops = {
 409                 .open      = pcm_open,
 410                 .close     = pcm_close,
 411                 .ioctl     = snd_pcm_lib_ioctl,
 412                 .hw_params = pcm_capture_hw_params,
 413                 .hw_free   = pcm_capture_hw_free,
 414                 .prepare   = pcm_capture_prepare,
 415                 .trigger   = pcm_capture_trigger,
 416                 .pointer   = pcm_capture_pointer,
 417                 .ack       = pcm_capture_ack,
 418                 .page      = snd_pcm_lib_get_vmalloc_page,
 419         };
 420         static const struct snd_pcm_ops playback_ops = {
 421                 .open      = pcm_open,
 422                 .close     = pcm_close,
 423                 .ioctl     = snd_pcm_lib_ioctl,
 424                 .hw_params = pcm_playback_hw_params,
 425                 .hw_free   = pcm_playback_hw_free,
 426                 .prepare   = pcm_playback_prepare,
 427                 .trigger   = pcm_playback_trigger,
 428                 .pointer   = pcm_playback_pointer,
 429                 .ack       = pcm_playback_ack,
 430                 .page      = snd_pcm_lib_get_vmalloc_page,
 431         };
 432         struct snd_pcm *pcm;
 433         unsigned int cap = 0;
 434         int err;
 435
 436         if (oxfw->has_output)
 437                 cap = 1;
 438
 439         err = snd_pcm_new(oxfw->card, oxfw->card->driver, 0, 1, cap, &pcm);
 440         if (err < 0)
 441                 return err;
 442
 443         pcm->private_data = oxfw;
 444         strcpy(pcm->name, oxfw->card->shortname);
 445         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &playback_ops);
 446         if (cap > 0)
 447                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &capture_ops);
 448
 449         return 0;
 450 }