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