sound/firewire/tascam/tascam-pcm.c

   1 /*
   2  * tascam-pcm.c - a part of driver for TASCAM FireWire series
   3  *
   4  * Copyright (c) 2015 Takashi Sakamoto
   5  *
   6  * Licensed under the terms of the GNU General Public License, version 2.
   7  */
   8
   9 #include "tascam.h"
  10
  11 static void set_buffer_params(struct snd_pcm_hardware *hw)
  12 {
  13         hw->period_bytes_min = 4 * hw->channels_min;
  14         hw->period_bytes_max = hw->period_bytes_min * 2048;
  15         hw->buffer_bytes_max = hw->period_bytes_max * 2;
  16
  17         hw->periods_min = 2;
  18         hw->periods_max = UINT_MAX;
  19 }
  20
  21 static int pcm_init_hw_params(struct snd_tscm *tscm,
  22                               struct snd_pcm_substream *substream)
  23 {
  24         static const struct snd_pcm_hardware hardware = {
  25                 .info = SNDRV_PCM_INFO_BATCH |
  26                         SNDRV_PCM_INFO_BLOCK_TRANSFER |
  27                         SNDRV_PCM_INFO_INTERLEAVED |
  28                         SNDRV_PCM_INFO_JOINT_DUPLEX |
  29                         SNDRV_PCM_INFO_MMAP |
  30                         SNDRV_PCM_INFO_MMAP_VALID,
  31                 .rates = SNDRV_PCM_RATE_44100 |
  32                          SNDRV_PCM_RATE_48000 |
  33                          SNDRV_PCM_RATE_88200 |
  34                          SNDRV_PCM_RATE_96000,
  35                 .rate_min = 44100,
  36                 .rate_max = 96000,
  37                 .channels_min = 10,
  38                 .channels_max = 18,
  39         };
  40         struct snd_pcm_runtime *runtime = substream->runtime;
  41         struct amdtp_stream *stream;
  42         unsigned int pcm_channels;
  43
  44         runtime->hw = hardware;
  45
  46         if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
  47                 runtime->hw.formats = SNDRV_PCM_FMTBIT_S32;
  48                 stream = &tscm->tx_stream;
  49                 pcm_channels = tscm->spec->pcm_capture_analog_channels;
  50         } else {
  51                 runtime->hw.formats = SNDRV_PCM_FMTBIT_S32;
  52                 stream = &tscm->rx_stream;
  53                 pcm_channels = tscm->spec->pcm_playback_analog_channels;
  54         }
  55
  56         if (tscm->spec->has_adat)
  57                 pcm_channels += 8;
  58         if (tscm->spec->has_spdif)
  59                 pcm_channels += 2;
  60         runtime->hw.channels_min = runtime->hw.channels_max = pcm_channels;
  61
  62         set_buffer_params(&runtime->hw);
  63
  64         return amdtp_tscm_add_pcm_hw_constraints(stream, runtime);
  65 }
  66
  67 static int pcm_open(struct snd_pcm_substream *substream)
  68 {
  69         struct snd_tscm *tscm = substream->private_data;
  70         enum snd_tscm_clock clock;
  71         unsigned int rate;
  72         int err;
  73
  74         err = snd_tscm_stream_lock_try(tscm);
  75         if (err < 0)
  76                 goto end;
  77
  78         err = pcm_init_hw_params(tscm, substream);
  79         if (err < 0)
  80                 goto err_locked;
  81
  82         err = snd_tscm_stream_get_clock(tscm, &clock);
  83         if (clock != SND_TSCM_CLOCK_INTERNAL ||
  84             amdtp_stream_pcm_running(&tscm->rx_stream) ||
  85             amdtp_stream_pcm_running(&tscm->tx_stream)) {
  86                 err = snd_tscm_stream_get_rate(tscm, &rate);
  87                 if (err < 0)
  88                         goto err_locked;
  89                 substream->runtime->hw.rate_min = rate;
  90                 substream->runtime->hw.rate_max = rate;
  91         }
  92
  93         snd_pcm_set_sync(substream);
  94 end:
  95         return err;
  96 err_locked:
  97         snd_tscm_stream_lock_release(tscm);
  98         return err;
  99 }
 100
 101 static int pcm_close(struct snd_pcm_substream *substream)
 102 {
 103         struct snd_tscm *tscm = substream->private_data;
 104
 105         snd_tscm_stream_lock_release(tscm);
 106
 107         return 0;
 108 }
 109
 110 static int pcm_capture_hw_params(struct snd_pcm_substream *substream,
 111                                  struct snd_pcm_hw_params *hw_params)
 112 {
 113         struct snd_tscm *tscm = substream->private_data;
 114         int err;
 115
 116         err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
 117                                                params_buffer_bytes(hw_params));
 118         if (err < 0)
 119                 return err;
 120
 121         if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
 122                 mutex_lock(&tscm->mutex);
 123                 tscm->substreams_counter++;
 124                 mutex_unlock(&tscm->mutex);
 125         }
 126
 127         return 0;
 128 }
 129
 130 static int pcm_playback_hw_params(struct snd_pcm_substream *substream,
 131                                   struct snd_pcm_hw_params *hw_params)
 132 {
 133         struct snd_tscm *tscm = substream->private_data;
 134         int err;
 135
 136         err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
 137                                                params_buffer_bytes(hw_params));
 138         if (err < 0)
 139                 return err;
 140
 141         if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
 142                 mutex_lock(&tscm->mutex);
 143                 tscm->substreams_counter++;
 144                 mutex_unlock(&tscm->mutex);
 145         }
 146
 147         return 0;
 148 }
 149
 150 static int pcm_capture_hw_free(struct snd_pcm_substream *substream)
 151 {
 152         struct snd_tscm *tscm = substream->private_data;
 153
 154         mutex_lock(&tscm->mutex);
 155
 156         if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
 157                 tscm->substreams_counter--;
 158
 159         snd_tscm_stream_stop_duplex(tscm);
 160
 161         mutex_unlock(&tscm->mutex);
 162
 163         return snd_pcm_lib_free_vmalloc_buffer(substream);
 164 }
 165
 166 static int pcm_playback_hw_free(struct snd_pcm_substream *substream)
 167 {
 168         struct snd_tscm *tscm = substream->private_data;
 169
 170         mutex_lock(&tscm->mutex);
 171
 172         if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
 173                 tscm->substreams_counter--;
 174
 175         snd_tscm_stream_stop_duplex(tscm);
 176
 177         mutex_unlock(&tscm->mutex);
 178
 179         return snd_pcm_lib_free_vmalloc_buffer(substream);
 180 }
 181
 182 static int pcm_capture_prepare(struct snd_pcm_substream *substream)
 183 {
 184         struct snd_tscm *tscm = substream->private_data;
 185         struct snd_pcm_runtime *runtime = substream->runtime;
 186         int err;
 187
 188         mutex_lock(&tscm->mutex);
 189
 190         err = snd_tscm_stream_start_duplex(tscm, runtime->rate);
 191         if (err >= 0)
 192                 amdtp_stream_pcm_prepare(&tscm->tx_stream);
 193
 194         mutex_unlock(&tscm->mutex);
 195
 196         return err;
 197 }
 198
 199 static int pcm_playback_prepare(struct snd_pcm_substream *substream)
 200 {
 201         struct snd_tscm *tscm = substream->private_data;
 202         struct snd_pcm_runtime *runtime = substream->runtime;
 203         int err;
 204
 205         mutex_lock(&tscm->mutex);
 206
 207         err = snd_tscm_stream_start_duplex(tscm, runtime->rate);
 208         if (err >= 0)
 209                 amdtp_stream_pcm_prepare(&tscm->rx_stream);
 210
 211         mutex_unlock(&tscm->mutex);
 212
 213         return err;
 214 }
 215
 216 static int pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd)
 217 {
 218         struct snd_tscm *tscm = substream->private_data;
 219
 220         switch (cmd) {
 221         case SNDRV_PCM_TRIGGER_START:
 222                 amdtp_stream_pcm_trigger(&tscm->tx_stream, substream);
 223                 break;
 224         case SNDRV_PCM_TRIGGER_STOP:
 225                 amdtp_stream_pcm_trigger(&tscm->tx_stream, NULL);
 226                 break;
 227         default:
 228                 return -EINVAL;
 229         }
 230
 231         return 0;
 232 }
 233
 234 static int pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd)
 235 {
 236         struct snd_tscm *tscm = substream->private_data;
 237
 238         switch (cmd) {
 239         case SNDRV_PCM_TRIGGER_START:
 240                 amdtp_stream_pcm_trigger(&tscm->rx_stream, substream);
 241                 break;
 242         case SNDRV_PCM_TRIGGER_STOP:
 243                 amdtp_stream_pcm_trigger(&tscm->rx_stream, NULL);
 244                 break;
 245         default:
 246                 return -EINVAL;
 247         }
 248
 249         return 0;
 250 }
 251
 252 static snd_pcm_uframes_t pcm_capture_pointer(struct snd_pcm_substream *sbstrm)
 253 {
 254         struct snd_tscm *tscm = sbstrm->private_data;
 255
 256         return amdtp_stream_pcm_pointer(&tscm->tx_stream);
 257 }
 258
 259 static snd_pcm_uframes_t pcm_playback_pointer(struct snd_pcm_substream *sbstrm)
 260 {
 261         struct snd_tscm *tscm = sbstrm->private_data;
 262
 263         return amdtp_stream_pcm_pointer(&tscm->rx_stream);
 264 }
 265
 266 static int pcm_capture_ack(struct snd_pcm_substream *substream)
 267 {
 268         struct snd_tscm *tscm = substream->private_data;
 269
 270         return amdtp_stream_pcm_ack(&tscm->tx_stream);
 271 }
 272
 273 static int pcm_playback_ack(struct snd_pcm_substream *substream)
 274 {
 275         struct snd_tscm *tscm = substream->private_data;
 276
 277         return amdtp_stream_pcm_ack(&tscm->rx_stream);
 278 }
 279
 280 int snd_tscm_create_pcm_devices(struct snd_tscm *tscm)
 281 {
 282         static const struct snd_pcm_ops capture_ops = {
 283                 .open           = pcm_open,
 284                 .close          = pcm_close,
 285                 .ioctl          = snd_pcm_lib_ioctl,
 286                 .hw_params      = pcm_capture_hw_params,
 287                 .hw_free        = pcm_capture_hw_free,
 288                 .prepare        = pcm_capture_prepare,
 289                 .trigger        = pcm_capture_trigger,
 290                 .pointer        = pcm_capture_pointer,
 291                 .ack            = pcm_capture_ack,
 292                 .page           = snd_pcm_lib_get_vmalloc_page,
 293         };
 294         static const struct snd_pcm_ops playback_ops = {
 295                 .open           = pcm_open,
 296                 .close          = pcm_close,
 297                 .ioctl          = snd_pcm_lib_ioctl,
 298                 .hw_params      = pcm_playback_hw_params,
 299                 .hw_free        = pcm_playback_hw_free,
 300                 .prepare        = pcm_playback_prepare,
 301                 .trigger        = pcm_playback_trigger,
 302                 .pointer        = pcm_playback_pointer,
 303                 .ack            = pcm_playback_ack,
 304                 .page           = snd_pcm_lib_get_vmalloc_page,
 305                 .mmap           = snd_pcm_lib_mmap_vmalloc,
 306         };
 307         struct snd_pcm *pcm;
 308         int err;
 309
 310         err = snd_pcm_new(tscm->card, tscm->card->driver, 0, 1, 1, &pcm);
 311         if (err < 0)
 312                 return err;
 313
 314         pcm->private_data = tscm;
 315         snprintf(pcm->name, sizeof(pcm->name),
 316                  "%s PCM", tscm->card->shortname);
 317         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &playback_ops);
 318         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &capture_ops);
 319
 320         return 0;
 321 }