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