sound/firewire/digi00x/digi00x-pcm.c

   1 /*
   2  * digi00x-pcm.c - a part of driver for Digidesign Digi 002/003 family
   3  *
   4  * Copyright (c) 2014-2015 Takashi Sakamoto
   5  *
   6  * Licensed under the terms of the GNU General Public License, version 2.
   7  */
   8
   9 #include "digi00x.h"
  10
  11 static int hw_rule_rate(struct snd_pcm_hw_params *params,
  12                         struct snd_pcm_hw_rule *rule)
  13 {
  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         unsigned int i;
  22
  23         for (i = 0; i < SND_DG00X_RATE_COUNT; i++) {
  24                 if (!snd_interval_test(c,
  25                                        snd_dg00x_stream_pcm_channels[i]))
  26                         continue;
  27
  28                 t.min = min(t.min, snd_dg00x_stream_rates[i]);
  29                 t.max = max(t.max, snd_dg00x_stream_rates[i]);
  30         }
  31
  32         return snd_interval_refine(r, &t);
  33 }
  34
  35 static int hw_rule_channels(struct snd_pcm_hw_params *params,
  36                             struct snd_pcm_hw_rule *rule)
  37 {
  38         struct snd_interval *c =
  39                 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
  40         const struct snd_interval *r =
  41                 hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_RATE);
  42         struct snd_interval t = {
  43                 .min = UINT_MAX, .max = 0, .integer = 1,
  44         };
  45         unsigned int i;
  46
  47         for (i = 0; i < SND_DG00X_RATE_COUNT; i++) {
  48                 if (!snd_interval_test(r, snd_dg00x_stream_rates[i]))
  49                         continue;
  50
  51                 t.min = min(t.min, snd_dg00x_stream_pcm_channels[i]);
  52                 t.max = max(t.max, snd_dg00x_stream_pcm_channels[i]);
  53         }
  54
  55         return snd_interval_refine(c, &t);
  56 }
  57
  58 static int pcm_init_hw_params(struct snd_dg00x *dg00x,
  59                               struct snd_pcm_substream *substream)
  60 {
  61         struct snd_pcm_runtime *runtime = substream->runtime;
  62         struct snd_pcm_hardware *hw = &runtime->hw;
  63         struct amdtp_stream *s;
  64         int err;
  65
  66
  67         if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
  68                 substream->runtime->hw.formats = SNDRV_PCM_FMTBIT_S32;
  69                 s = &dg00x->tx_stream;
  70         } else {
  71                 substream->runtime->hw.formats = SNDRV_PCM_FMTBIT_S32;
  72                 s = &dg00x->rx_stream;
  73         }
  74
  75         hw->channels_min = 10;
  76         hw->channels_max = 18;
  77
  78         hw->rates = SNDRV_PCM_RATE_44100 |
  79                     SNDRV_PCM_RATE_48000 |
  80                     SNDRV_PCM_RATE_88200 |
  81                     SNDRV_PCM_RATE_96000;
  82         snd_pcm_limit_hw_rates(runtime);
  83
  84         err = snd_pcm_hw_rule_add(substream->runtime, 0,
  85                                   SNDRV_PCM_HW_PARAM_CHANNELS,
  86                                   hw_rule_channels, NULL,
  87                                   SNDRV_PCM_HW_PARAM_RATE, -1);
  88         if (err < 0)
  89                 return err;
  90
  91         err = snd_pcm_hw_rule_add(substream->runtime, 0,
  92                                   SNDRV_PCM_HW_PARAM_RATE,
  93                                   hw_rule_rate, NULL,
  94                                   SNDRV_PCM_HW_PARAM_CHANNELS, -1);
  95         if (err < 0)
  96                 return err;
  97
  98         return amdtp_dot_add_pcm_hw_constraints(s, substream->runtime);
  99 }
 100
 101 static int pcm_open(struct snd_pcm_substream *substream)
 102 {
 103         struct snd_dg00x *dg00x = substream->private_data;
 104         enum snd_dg00x_clock clock;
 105         bool detect;
 106         unsigned int rate;
 107         int err;
 108
 109         err = snd_dg00x_stream_lock_try(dg00x);
 110         if (err < 0)
 111                 goto end;
 112
 113         err = pcm_init_hw_params(dg00x, substream);
 114         if (err < 0)
 115                 goto err_locked;
 116
 117         /* Check current clock source. */
 118         err = snd_dg00x_stream_get_clock(dg00x, &clock);
 119         if (err < 0)
 120                 goto err_locked;
 121         if (clock != SND_DG00X_CLOCK_INTERNAL) {
 122                 err = snd_dg00x_stream_check_external_clock(dg00x, &detect);
 123                 if (err < 0)
 124                         goto err_locked;
 125                 if (!detect) {
 126                         err = -EBUSY;
 127                         goto err_locked;
 128                 }
 129         }
 130
 131         if ((clock != SND_DG00X_CLOCK_INTERNAL) ||
 132             amdtp_stream_pcm_running(&dg00x->rx_stream) ||
 133             amdtp_stream_pcm_running(&dg00x->tx_stream)) {
 134                 err = snd_dg00x_stream_get_external_rate(dg00x, &rate);
 135                 if (err < 0)
 136                         goto err_locked;
 137                 substream->runtime->hw.rate_min = rate;
 138                 substream->runtime->hw.rate_max = rate;
 139         }
 140
 141         snd_pcm_set_sync(substream);
 142 end:
 143         return err;
 144 err_locked:
 145         snd_dg00x_stream_lock_release(dg00x);
 146         return err;
 147 }
 148
 149 static int pcm_close(struct snd_pcm_substream *substream)
 150 {
 151         struct snd_dg00x *dg00x = substream->private_data;
 152
 153         snd_dg00x_stream_lock_release(dg00x);
 154
 155         return 0;
 156 }
 157
 158 static int pcm_capture_hw_params(struct snd_pcm_substream *substream,
 159                                  struct snd_pcm_hw_params *hw_params)
 160 {
 161         struct snd_dg00x *dg00x = substream->private_data;
 162         int err;
 163
 164         err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
 165                                                params_buffer_bytes(hw_params));
 166         if (err < 0)
 167                 return err;
 168
 169         if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
 170                 mutex_lock(&dg00x->mutex);
 171                 dg00x->substreams_counter++;
 172                 mutex_unlock(&dg00x->mutex);
 173         }
 174
 175         return 0;
 176 }
 177
 178 static int pcm_playback_hw_params(struct snd_pcm_substream *substream,
 179                                   struct snd_pcm_hw_params *hw_params)
 180 {
 181         struct snd_dg00x *dg00x = substream->private_data;
 182         int err;
 183
 184         err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
 185                                                params_buffer_bytes(hw_params));
 186         if (err < 0)
 187                 return err;
 188
 189         if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
 190                 mutex_lock(&dg00x->mutex);
 191                 dg00x->substreams_counter++;
 192                 mutex_unlock(&dg00x->mutex);
 193         }
 194
 195         return 0;
 196 }
 197
 198 static int pcm_capture_hw_free(struct snd_pcm_substream *substream)
 199 {
 200         struct snd_dg00x *dg00x = substream->private_data;
 201
 202         mutex_lock(&dg00x->mutex);
 203
 204         if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
 205                 dg00x->substreams_counter--;
 206
 207         snd_dg00x_stream_stop_duplex(dg00x);
 208
 209         mutex_unlock(&dg00x->mutex);
 210
 211         return snd_pcm_lib_free_vmalloc_buffer(substream);
 212 }
 213
 214 static int pcm_playback_hw_free(struct snd_pcm_substream *substream)
 215 {
 216         struct snd_dg00x *dg00x = substream->private_data;
 217
 218         mutex_lock(&dg00x->mutex);
 219
 220         if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
 221                 dg00x->substreams_counter--;
 222
 223         snd_dg00x_stream_stop_duplex(dg00x);
 224
 225         mutex_unlock(&dg00x->mutex);
 226
 227         return snd_pcm_lib_free_vmalloc_buffer(substream);
 228 }
 229
 230 static int pcm_capture_prepare(struct snd_pcm_substream *substream)
 231 {
 232         struct snd_dg00x *dg00x = substream->private_data;
 233         struct snd_pcm_runtime *runtime = substream->runtime;
 234         int err;
 235
 236         mutex_lock(&dg00x->mutex);
 237
 238         err = snd_dg00x_stream_start_duplex(dg00x, runtime->rate);
 239         if (err >= 0)
 240                 amdtp_stream_pcm_prepare(&dg00x->tx_stream);
 241
 242         mutex_unlock(&dg00x->mutex);
 243
 244         return err;
 245 }
 246
 247 static int pcm_playback_prepare(struct snd_pcm_substream *substream)
 248 {
 249         struct snd_dg00x *dg00x = substream->private_data;
 250         struct snd_pcm_runtime *runtime = substream->runtime;
 251         int err;
 252
 253         mutex_lock(&dg00x->mutex);
 254
 255         err = snd_dg00x_stream_start_duplex(dg00x, runtime->rate);
 256         if (err >= 0) {
 257                 amdtp_stream_pcm_prepare(&dg00x->rx_stream);
 258                 amdtp_dot_reset(&dg00x->rx_stream);
 259         }
 260
 261         mutex_unlock(&dg00x->mutex);
 262
 263         return err;
 264 }
 265
 266 static int pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd)
 267 {
 268         struct snd_dg00x *dg00x = substream->private_data;
 269
 270         switch (cmd) {
 271         case SNDRV_PCM_TRIGGER_START:
 272                 amdtp_stream_pcm_trigger(&dg00x->tx_stream, substream);
 273                 break;
 274         case SNDRV_PCM_TRIGGER_STOP:
 275                 amdtp_stream_pcm_trigger(&dg00x->tx_stream, NULL);
 276                 break;
 277         default:
 278                 return -EINVAL;
 279         }
 280
 281         return 0;
 282 }
 283
 284 static int pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd)
 285 {
 286         struct snd_dg00x *dg00x = substream->private_data;
 287
 288         switch (cmd) {
 289         case SNDRV_PCM_TRIGGER_START:
 290                 amdtp_stream_pcm_trigger(&dg00x->rx_stream, substream);
 291                 break;
 292         case SNDRV_PCM_TRIGGER_STOP:
 293                 amdtp_stream_pcm_trigger(&dg00x->rx_stream, NULL);
 294                 break;
 295         default:
 296                 return -EINVAL;
 297         }
 298
 299         return 0;
 300 }
 301
 302 static snd_pcm_uframes_t pcm_capture_pointer(struct snd_pcm_substream *sbstrm)
 303 {
 304         struct snd_dg00x *dg00x = sbstrm->private_data;
 305
 306         return amdtp_stream_pcm_pointer(&dg00x->tx_stream);
 307 }
 308
 309 static snd_pcm_uframes_t pcm_playback_pointer(struct snd_pcm_substream *sbstrm)
 310 {
 311         struct snd_dg00x *dg00x = sbstrm->private_data;
 312
 313         return amdtp_stream_pcm_pointer(&dg00x->rx_stream);
 314 }
 315
 316 static int pcm_capture_ack(struct snd_pcm_substream *substream)
 317 {
 318         struct snd_dg00x *dg00x = substream->private_data;
 319
 320         return amdtp_stream_pcm_ack(&dg00x->tx_stream);
 321 }
 322
 323 static int pcm_playback_ack(struct snd_pcm_substream *substream)
 324 {
 325         struct snd_dg00x *dg00x = substream->private_data;
 326
 327         return amdtp_stream_pcm_ack(&dg00x->rx_stream);
 328 }
 329
 330 int snd_dg00x_create_pcm_devices(struct snd_dg00x *dg00x)
 331 {
 332         static const struct snd_pcm_ops capture_ops = {
 333                 .open           = pcm_open,
 334                 .close          = pcm_close,
 335                 .ioctl          = snd_pcm_lib_ioctl,
 336                 .hw_params      = pcm_capture_hw_params,
 337                 .hw_free        = pcm_capture_hw_free,
 338                 .prepare        = pcm_capture_prepare,
 339                 .trigger        = pcm_capture_trigger,
 340                 .pointer        = pcm_capture_pointer,
 341                 .ack            = pcm_capture_ack,
 342                 .page           = snd_pcm_lib_get_vmalloc_page,
 343         };
 344         static const struct snd_pcm_ops playback_ops = {
 345                 .open           = pcm_open,
 346                 .close          = pcm_close,
 347                 .ioctl          = snd_pcm_lib_ioctl,
 348                 .hw_params      = pcm_playback_hw_params,
 349                 .hw_free        = pcm_playback_hw_free,
 350                 .prepare        = pcm_playback_prepare,
 351                 .trigger        = pcm_playback_trigger,
 352                 .pointer        = pcm_playback_pointer,
 353                 .ack            = pcm_playback_ack,
 354                 .page           = snd_pcm_lib_get_vmalloc_page,
 355                 .mmap           = snd_pcm_lib_mmap_vmalloc,
 356         };
 357         struct snd_pcm *pcm;
 358         int err;
 359
 360         err = snd_pcm_new(dg00x->card, dg00x->card->driver, 0, 1, 1, &pcm);
 361         if (err < 0)
 362                 return err;
 363
 364         pcm->private_data = dg00x;
 365         snprintf(pcm->name, sizeof(pcm->name),
 366                  "%s PCM", dg00x->card->shortname);
 367         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &playback_ops);
 368         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &capture_ops);
 369
 370         return 0;
 371 }