sound/firewire/digi00x/digi00x-pcm.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * digi00x-pcm.c - a part of driver for Digidesign Digi 002/003 family
   4  *
   5  * Copyright (c) 2014-2015 Takashi Sakamoto
   6  */
   7
   8 #include "digi00x.h"
   9
  10 static int hw_rule_rate(struct snd_pcm_hw_params *params,
  11                         struct snd_pcm_hw_rule *rule)
  12 {
  13         struct snd_interval *r =
  14                 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
  15         const struct snd_interval *c =
  16                 hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_CHANNELS);
  17         struct snd_interval t = {
  18                 .min = UINT_MAX, .max = 0, .integer = 1,
  19         };
  20         unsigned int i;
  21
  22         for (i = 0; i < SND_DG00X_RATE_COUNT; i++) {
  23                 if (!snd_interval_test(c,
  24                                        snd_dg00x_stream_pcm_channels[i]))
  25                         continue;
  26
  27                 t.min = min(t.min, snd_dg00x_stream_rates[i]);
  28                 t.max = max(t.max, snd_dg00x_stream_rates[i]);
  29         }
  30
  31         return snd_interval_refine(r, &t);
  32 }
  33
  34 static int hw_rule_channels(struct snd_pcm_hw_params *params,
  35                             struct snd_pcm_hw_rule *rule)
  36 {
  37         struct snd_interval *c =
  38                 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
  39         const struct snd_interval *r =
  40                 hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_RATE);
  41         struct snd_interval t = {
  42                 .min = UINT_MAX, .max = 0, .integer = 1,
  43         };
  44         unsigned int i;
  45
  46         for (i = 0; i < SND_DG00X_RATE_COUNT; i++) {
  47                 if (!snd_interval_test(r, snd_dg00x_stream_rates[i]))
  48                         continue;
  49
  50                 t.min = min(t.min, snd_dg00x_stream_pcm_channels[i]);
  51                 t.max = max(t.max, snd_dg00x_stream_pcm_channels[i]);
  52         }
  53
  54         return snd_interval_refine(c, &t);
  55 }
  56
  57 static int pcm_init_hw_params(struct snd_dg00x *dg00x,
  58                               struct snd_pcm_substream *substream)
  59 {
  60         struct snd_pcm_runtime *runtime = substream->runtime;
  61         struct snd_pcm_hardware *hw = &runtime->hw;
  62         struct amdtp_stream *s;
  63         int err;
  64
  65
  66         if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
  67                 substream->runtime->hw.formats = SNDRV_PCM_FMTBIT_S32;
  68                 s = &dg00x->tx_stream;
  69         } else {
  70                 substream->runtime->hw.formats = SNDRV_PCM_FMTBIT_S32;
  71                 s = &dg00x->rx_stream;
  72         }
  73
  74         hw->channels_min = 10;
  75         hw->channels_max = 18;
  76
  77         hw->rates = SNDRV_PCM_RATE_44100 |
  78                     SNDRV_PCM_RATE_48000 |
  79                     SNDRV_PCM_RATE_88200 |
  80                     SNDRV_PCM_RATE_96000;
  81         snd_pcm_limit_hw_rates(runtime);
  82
  83         err = snd_pcm_hw_rule_add(substream->runtime, 0,
  84                                   SNDRV_PCM_HW_PARAM_CHANNELS,
  85                                   hw_rule_channels, NULL,
  86                                   SNDRV_PCM_HW_PARAM_RATE, -1);
  87         if (err < 0)
  88                 return err;
  89
  90         err = snd_pcm_hw_rule_add(substream->runtime, 0,
  91                                   SNDRV_PCM_HW_PARAM_RATE,
  92                                   hw_rule_rate, NULL,
  93                                   SNDRV_PCM_HW_PARAM_CHANNELS, -1);
  94         if (err < 0)
  95                 return err;
  96
  97         return amdtp_dot_add_pcm_hw_constraints(s, substream->runtime);
  98 }
  99
 100 static int pcm_open(struct snd_pcm_substream *substream)
 101 {
 102         struct snd_dg00x *dg00x = substream->private_data;
 103         struct amdtp_domain *d = &dg00x->domain;
 104         enum snd_dg00x_clock clock;
 105         bool detect;
 106         int err;
 107
 108         err = snd_dg00x_stream_lock_try(dg00x);
 109         if (err < 0)
 110                 return err;
 111
 112         err = pcm_init_hw_params(dg00x, substream);
 113         if (err < 0)
 114                 goto err_locked;
 115
 116         /* Check current clock source. */
 117         err = snd_dg00x_stream_get_clock(dg00x, &clock);
 118         if (err < 0)
 119                 goto err_locked;
 120         if (clock != SND_DG00X_CLOCK_INTERNAL) {
 121                 err = snd_dg00x_stream_check_external_clock(dg00x, &detect);
 122                 if (err < 0)
 123                         goto err_locked;
 124                 if (!detect) {
 125                         err = -EBUSY;
 126                         goto err_locked;
 127                 }
 128         }
 129
 130         mutex_lock(&dg00x->mutex);
 131
 132         // When source of clock is not internal or any stream is reserved for
 133         // transmission of PCM frames, the available sampling rate is limited
 134         // at current one.
 135         if ((clock != SND_DG00X_CLOCK_INTERNAL) ||
 136             (dg00x->substreams_counter > 0 && d->events_per_period > 0)) {
 137                 unsigned int frames_per_period = d->events_per_period;
 138                 unsigned int frames_per_buffer = d->events_per_buffer;
 139                 unsigned int rate;
 140
 141                 err = snd_dg00x_stream_get_external_rate(dg00x, &rate);
 142                 if (err < 0) {
 143                         mutex_unlock(&dg00x->mutex);
 144                         goto err_locked;
 145                 }
 146                 substream->runtime->hw.rate_min = rate;
 147                 substream->runtime->hw.rate_max = rate;
 148
 149                 if (frames_per_period > 0) {
 150                         err = snd_pcm_hw_constraint_minmax(substream->runtime,
 151                                         SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
 152                                         frames_per_period, frames_per_period);
 153                         if (err < 0) {
 154                                 mutex_unlock(&dg00x->mutex);
 155                                 goto err_locked;
 156                         }
 157
 158                         err = snd_pcm_hw_constraint_minmax(substream->runtime,
 159                                         SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
 160                                         frames_per_buffer, frames_per_buffer);
 161                         if (err < 0) {
 162                                 mutex_unlock(&dg00x->mutex);
 163                                 goto err_locked;
 164                         }
 165                 }
 166         }
 167
 168         mutex_unlock(&dg00x->mutex);
 169
 170         snd_pcm_set_sync(substream);
 171
 172         return 0;
 173 err_locked:
 174         snd_dg00x_stream_lock_release(dg00x);
 175         return err;
 176 }
 177
 178 static int pcm_close(struct snd_pcm_substream *substream)
 179 {
 180         struct snd_dg00x *dg00x = substream->private_data;
 181
 182         snd_dg00x_stream_lock_release(dg00x);
 183
 184         return 0;
 185 }
 186
 187 static int pcm_hw_params(struct snd_pcm_substream *substream,
 188                          struct snd_pcm_hw_params *hw_params)
 189 {
 190         struct snd_dg00x *dg00x = substream->private_data;
 191         int err = 0;
 192
 193         if (substream->runtime->state == SNDRV_PCM_STATE_OPEN) {
 194                 unsigned int rate = params_rate(hw_params);
 195                 unsigned int frames_per_period = params_period_size(hw_params);
 196                 unsigned int frames_per_buffer = params_buffer_size(hw_params);
 197
 198                 mutex_lock(&dg00x->mutex);
 199                 err = snd_dg00x_stream_reserve_duplex(dg00x, rate,
 200                                         frames_per_period, frames_per_buffer);
 201                 if (err >= 0)
 202                         ++dg00x->substreams_counter;
 203                 mutex_unlock(&dg00x->mutex);
 204         }
 205
 206         return err;
 207 }
 208
 209 static int pcm_hw_free(struct snd_pcm_substream *substream)
 210 {
 211         struct snd_dg00x *dg00x = substream->private_data;
 212
 213         mutex_lock(&dg00x->mutex);
 214
 215         if (substream->runtime->state != SNDRV_PCM_STATE_OPEN)
 216                 --dg00x->substreams_counter;
 217
 218         snd_dg00x_stream_stop_duplex(dg00x);
 219
 220         mutex_unlock(&dg00x->mutex);
 221
 222         return 0;
 223 }
 224
 225 static int pcm_capture_prepare(struct snd_pcm_substream *substream)
 226 {
 227         struct snd_dg00x *dg00x = substream->private_data;
 228         int err;
 229
 230         mutex_lock(&dg00x->mutex);
 231
 232         err = snd_dg00x_stream_start_duplex(dg00x);
 233         if (err >= 0)
 234                 amdtp_stream_pcm_prepare(&dg00x->tx_stream);
 235
 236         mutex_unlock(&dg00x->mutex);
 237
 238         return err;
 239 }
 240
 241 static int pcm_playback_prepare(struct snd_pcm_substream *substream)
 242 {
 243         struct snd_dg00x *dg00x = substream->private_data;
 244         int err;
 245
 246         mutex_lock(&dg00x->mutex);
 247
 248         err = snd_dg00x_stream_start_duplex(dg00x);
 249         if (err >= 0) {
 250                 amdtp_stream_pcm_prepare(&dg00x->rx_stream);
 251                 amdtp_dot_reset(&dg00x->rx_stream);
 252         }
 253
 254         mutex_unlock(&dg00x->mutex);
 255
 256         return err;
 257 }
 258
 259 static int pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd)
 260 {
 261         struct snd_dg00x *dg00x = substream->private_data;
 262
 263         switch (cmd) {
 264         case SNDRV_PCM_TRIGGER_START:
 265                 amdtp_stream_pcm_trigger(&dg00x->tx_stream, substream);
 266                 break;
 267         case SNDRV_PCM_TRIGGER_STOP:
 268                 amdtp_stream_pcm_trigger(&dg00x->tx_stream, NULL);
 269                 break;
 270         default:
 271                 return -EINVAL;
 272         }
 273
 274         return 0;
 275 }
 276
 277 static int pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd)
 278 {
 279         struct snd_dg00x *dg00x = substream->private_data;
 280
 281         switch (cmd) {
 282         case SNDRV_PCM_TRIGGER_START:
 283                 amdtp_stream_pcm_trigger(&dg00x->rx_stream, substream);
 284                 break;
 285         case SNDRV_PCM_TRIGGER_STOP:
 286                 amdtp_stream_pcm_trigger(&dg00x->rx_stream, NULL);
 287                 break;
 288         default:
 289                 return -EINVAL;
 290         }
 291
 292         return 0;
 293 }
 294
 295 static snd_pcm_uframes_t pcm_capture_pointer(struct snd_pcm_substream *sbstrm)
 296 {
 297         struct snd_dg00x *dg00x = sbstrm->private_data;
 298
 299         return amdtp_domain_stream_pcm_pointer(&dg00x->domain, &dg00x->tx_stream);
 300 }
 301
 302 static snd_pcm_uframes_t pcm_playback_pointer(struct snd_pcm_substream *sbstrm)
 303 {
 304         struct snd_dg00x *dg00x = sbstrm->private_data;
 305
 306         return amdtp_domain_stream_pcm_pointer(&dg00x->domain, &dg00x->rx_stream);
 307 }
 308
 309 static int pcm_capture_ack(struct snd_pcm_substream *substream)
 310 {
 311         struct snd_dg00x *dg00x = substream->private_data;
 312
 313         return amdtp_domain_stream_pcm_ack(&dg00x->domain, &dg00x->tx_stream);
 314 }
 315
 316 static int pcm_playback_ack(struct snd_pcm_substream *substream)
 317 {
 318         struct snd_dg00x *dg00x = substream->private_data;
 319
 320         return amdtp_domain_stream_pcm_ack(&dg00x->domain, &dg00x->rx_stream);
 321 }
 322
 323 int snd_dg00x_create_pcm_devices(struct snd_dg00x *dg00x)
 324 {
 325         static const struct snd_pcm_ops capture_ops = {
 326                 .open           = pcm_open,
 327                 .close          = pcm_close,
 328                 .hw_params      = pcm_hw_params,
 329                 .hw_free        = pcm_hw_free,
 330                 .prepare        = pcm_capture_prepare,
 331                 .trigger        = pcm_capture_trigger,
 332                 .pointer        = pcm_capture_pointer,
 333                 .ack            = pcm_capture_ack,
 334         };
 335         static const struct snd_pcm_ops playback_ops = {
 336                 .open           = pcm_open,
 337                 .close          = pcm_close,
 338                 .hw_params      = pcm_hw_params,
 339                 .hw_free        = pcm_hw_free,
 340                 .prepare        = pcm_playback_prepare,
 341                 .trigger        = pcm_playback_trigger,
 342                 .pointer        = pcm_playback_pointer,
 343                 .ack            = pcm_playback_ack,
 344         };
 345         struct snd_pcm *pcm;
 346         int err;
 347
 348         err = snd_pcm_new(dg00x->card, dg00x->card->driver, 0, 1, 1, &pcm);
 349         if (err < 0)
 350                 return err;
 351
 352         pcm->private_data = dg00x;
 353         snprintf(pcm->name, sizeof(pcm->name),
 354                  "%s PCM", dg00x->card->shortname);
 355         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &playback_ops);
 356         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &capture_ops);
 357         snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_VMALLOC, NULL, 0, 0);
 358
 359         return 0;
 360 }