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 =
  52                                 SNDRV_PCM_FMTBIT_S16 | SNDRV_PCM_FMTBIT_S32;
  53                 stream = &tscm->rx_stream;
  54                 pcm_channels = tscm->spec->pcm_playback_analog_channels;
  55         }
  56
  57         if (tscm->spec->has_adat)
  58                 pcm_channels += 8;
  59         if (tscm->spec->has_spdif)
  60                 pcm_channels += 2;
  61         runtime->hw.channels_min = runtime->hw.channels_max = pcm_channels;
  62
  63         set_buffer_params(&runtime->hw);
  64
  65         return amdtp_tscm_add_pcm_hw_constraints(stream, runtime);
  66 }
  67
  68 static int pcm_open(struct snd_pcm_substream *substream)
  69 {
  70         struct snd_tscm *tscm = substream->private_data;
  71         enum snd_tscm_clock clock;
  72         unsigned int rate;
  73         int err;
  74
  75         err = snd_tscm_stream_lock_try(tscm);
  76         if (err < 0)
  77                 goto end;
  78
  79         err = pcm_init_hw_params(tscm, substream);
  80         if (err < 0)
  81                 goto err_locked;
  82
  83         err = snd_tscm_stream_get_clock(tscm, &clock);
  84         if (err < 0)
  85                 goto err_locked;
  86
  87         if (clock != SND_TSCM_CLOCK_INTERNAL ||
  88             amdtp_stream_pcm_running(&tscm->rx_stream) ||
  89             amdtp_stream_pcm_running(&tscm->tx_stream)) {
  90                 err = snd_tscm_stream_get_rate(tscm, &rate);
  91                 if (err < 0)
  92                         goto err_locked;
  93                 substream->runtime->hw.rate_min = rate;
  94                 substream->runtime->hw.rate_max = rate;
  95         }
  96
  97         snd_pcm_set_sync(substream);
  98 end:
  99         return err;
 100 err_locked:
 101         snd_tscm_stream_lock_release(tscm);
 102         return err;
 103 }
 104
 105 static int pcm_close(struct snd_pcm_substream *substream)
 106 {
 107         struct snd_tscm *tscm = substream->private_data;
 108
 109         snd_tscm_stream_lock_release(tscm);
 110
 111         return 0;
 112 }
 113
 114 static int pcm_capture_hw_params(struct snd_pcm_substream *substream,
 115                                  struct snd_pcm_hw_params *hw_params)
 116 {
 117         struct snd_tscm *tscm = substream->private_data;
 118         int err;
 119
 120         err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
 121                                                params_buffer_bytes(hw_params));
 122         if (err < 0)
 123                 return err;
 124
 125         if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
 126                 mutex_lock(&tscm->mutex);
 127                 tscm->substreams_counter++;
 128                 mutex_unlock(&tscm->mutex);
 129         }
 130
 131         amdtp_tscm_set_pcm_format(&tscm->tx_stream, params_format(hw_params));
 132
 133         return 0;
 134 }
 135
 136 static int pcm_playback_hw_params(struct snd_pcm_substream *substream,
 137                                   struct snd_pcm_hw_params *hw_params)
 138 {
 139         struct snd_tscm *tscm = substream->private_data;
 140         int err;
 141
 142         err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
 143                                                params_buffer_bytes(hw_params));
 144         if (err < 0)
 145                 return err;
 146
 147         if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
 148                 mutex_lock(&tscm->mutex);
 149                 tscm->substreams_counter++;
 150                 mutex_unlock(&tscm->mutex);
 151         }
 152
 153         amdtp_tscm_set_pcm_format(&tscm->rx_stream, params_format(hw_params));
 154
 155         return 0;
 156 }
 157
 158 static int pcm_capture_hw_free(struct snd_pcm_substream *substream)
 159 {
 160         struct snd_tscm *tscm = substream->private_data;
 161
 162         mutex_lock(&tscm->mutex);
 163
 164         if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
 165                 tscm->substreams_counter--;
 166
 167         snd_tscm_stream_stop_duplex(tscm);
 168
 169         mutex_unlock(&tscm->mutex);
 170
 171         return snd_pcm_lib_free_vmalloc_buffer(substream);
 172 }
 173
 174 static int pcm_playback_hw_free(struct snd_pcm_substream *substream)
 175 {
 176         struct snd_tscm *tscm = substream->private_data;
 177
 178         mutex_lock(&tscm->mutex);
 179
 180         if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
 181                 tscm->substreams_counter--;
 182
 183         snd_tscm_stream_stop_duplex(tscm);
 184
 185         mutex_unlock(&tscm->mutex);
 186
 187         return snd_pcm_lib_free_vmalloc_buffer(substream);
 188 }
 189
 190 static int pcm_capture_prepare(struct snd_pcm_substream *substream)
 191 {
 192         struct snd_tscm *tscm = substream->private_data;
 193         struct snd_pcm_runtime *runtime = substream->runtime;
 194         int err;
 195
 196         mutex_lock(&tscm->mutex);
 197
 198         err = snd_tscm_stream_start_duplex(tscm, runtime->rate);
 199         if (err >= 0)
 200                 amdtp_stream_pcm_prepare(&tscm->tx_stream);
 201
 202         mutex_unlock(&tscm->mutex);
 203
 204         return err;
 205 }
 206
 207 static int pcm_playback_prepare(struct snd_pcm_substream *substream)
 208 {
 209         struct snd_tscm *tscm = substream->private_data;
 210         struct snd_pcm_runtime *runtime = substream->runtime;
 211         int err;
 212
 213         mutex_lock(&tscm->mutex);
 214
 215         err = snd_tscm_stream_start_duplex(tscm, runtime->rate);
 216         if (err >= 0)
 217                 amdtp_stream_pcm_prepare(&tscm->rx_stream);
 218
 219         mutex_unlock(&tscm->mutex);
 220
 221         return err;
 222 }
 223
 224 static int pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd)
 225 {
 226         struct snd_tscm *tscm = substream->private_data;
 227
 228         switch (cmd) {
 229         case SNDRV_PCM_TRIGGER_START:
 230                 amdtp_stream_pcm_trigger(&tscm->tx_stream, substream);
 231                 break;
 232         case SNDRV_PCM_TRIGGER_STOP:
 233                 amdtp_stream_pcm_trigger(&tscm->tx_stream, NULL);
 234                 break;
 235         default:
 236                 return -EINVAL;
 237         }
 238
 239         return 0;
 240 }
 241
 242 static int pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd)
 243 {
 244         struct snd_tscm *tscm = substream->private_data;
 245
 246         switch (cmd) {
 247         case SNDRV_PCM_TRIGGER_START:
 248                 amdtp_stream_pcm_trigger(&tscm->rx_stream, substream);
 249                 break;
 250         case SNDRV_PCM_TRIGGER_STOP:
 251                 amdtp_stream_pcm_trigger(&tscm->rx_stream, NULL);
 252                 break;
 253         default:
 254                 return -EINVAL;
 255         }
 256
 257         return 0;
 258 }
 259
 260 static snd_pcm_uframes_t pcm_capture_pointer(struct snd_pcm_substream *sbstrm)
 261 {
 262         struct snd_tscm *tscm = sbstrm->private_data;
 263
 264         return amdtp_stream_pcm_pointer(&tscm->tx_stream);
 265 }
 266
 267 static snd_pcm_uframes_t pcm_playback_pointer(struct snd_pcm_substream *sbstrm)
 268 {
 269         struct snd_tscm *tscm = sbstrm->private_data;
 270
 271         return amdtp_stream_pcm_pointer(&tscm->rx_stream);
 272 }
 273
 274 static struct snd_pcm_ops pcm_capture_ops = {
 275         .open           = pcm_open,
 276         .close          = pcm_close,
 277         .ioctl          = snd_pcm_lib_ioctl,
 278         .hw_params      = pcm_capture_hw_params,
 279         .hw_free        = pcm_capture_hw_free,
 280         .prepare        = pcm_capture_prepare,
 281         .trigger        = pcm_capture_trigger,
 282         .pointer        = pcm_capture_pointer,
 283         .page           = snd_pcm_lib_get_vmalloc_page,
 284 };
 285
 286 static struct snd_pcm_ops pcm_playback_ops = {
 287         .open           = pcm_open,
 288         .close          = pcm_close,
 289         .ioctl          = snd_pcm_lib_ioctl,
 290         .hw_params      = pcm_playback_hw_params,
 291         .hw_free        = pcm_playback_hw_free,
 292         .prepare        = pcm_playback_prepare,
 293         .trigger        = pcm_playback_trigger,
 294         .pointer        = pcm_playback_pointer,
 295         .page           = snd_pcm_lib_get_vmalloc_page,
 296         .mmap           = snd_pcm_lib_mmap_vmalloc,
 297 };
 298
 299 int snd_tscm_create_pcm_devices(struct snd_tscm *tscm)
 300 {
 301         struct snd_pcm *pcm;
 302         int err;
 303
 304         err = snd_pcm_new(tscm->card, tscm->card->driver, 0, 1, 1, &pcm);
 305         if (err < 0)
 306                 return err;
 307
 308         pcm->private_data = tscm;
 309         snprintf(pcm->name, sizeof(pcm->name),
 310                  "%s PCM", tscm->card->shortname);
 311         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &pcm_playback_ops);
 312         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &pcm_capture_ops);
 313
 314         return 0;
 315 }