sound/firewire/tascam/tascam-pcm.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * tascam-pcm.c - a part of driver for TASCAM FireWire series
   4  *
   5  * Copyright (c) 2015 Takashi Sakamoto
   6  */
   7
   8 #include "tascam.h"
   9
  10 static int pcm_init_hw_params(struct snd_tscm *tscm,
  11                               struct snd_pcm_substream *substream)
  12 {
  13         struct snd_pcm_runtime *runtime = substream->runtime;
  14         struct snd_pcm_hardware *hw = &runtime->hw;
  15         struct amdtp_stream *stream;
  16         unsigned int pcm_channels;
  17
  18         if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
  19                 runtime->hw.formats = SNDRV_PCM_FMTBIT_S32;
  20                 stream = &tscm->tx_stream;
  21                 pcm_channels = tscm->spec->pcm_capture_analog_channels;
  22         } else {
  23                 runtime->hw.formats = SNDRV_PCM_FMTBIT_S32;
  24                 stream = &tscm->rx_stream;
  25                 pcm_channels = tscm->spec->pcm_playback_analog_channels;
  26         }
  27
  28         if (tscm->spec->has_adat)
  29                 pcm_channels += 8;
  30         if (tscm->spec->has_spdif)
  31                 pcm_channels += 2;
  32         runtime->hw.channels_min = runtime->hw.channels_max = pcm_channels;
  33
  34         hw->rates = SNDRV_PCM_RATE_44100 |
  35                     SNDRV_PCM_RATE_48000 |
  36                     SNDRV_PCM_RATE_88200 |
  37                     SNDRV_PCM_RATE_96000;
  38         snd_pcm_limit_hw_rates(runtime);
  39
  40         return amdtp_tscm_add_pcm_hw_constraints(stream, runtime);
  41 }
  42
  43 static int pcm_open(struct snd_pcm_substream *substream)
  44 {
  45         struct snd_tscm *tscm = substream->private_data;
  46         enum snd_tscm_clock clock;
  47         unsigned int rate;
  48         int err;
  49
  50         err = snd_tscm_stream_lock_try(tscm);
  51         if (err < 0)
  52                 goto end;
  53
  54         err = pcm_init_hw_params(tscm, substream);
  55         if (err < 0)
  56                 goto err_locked;
  57
  58         err = snd_tscm_stream_get_clock(tscm, &clock);
  59         if (clock != SND_TSCM_CLOCK_INTERNAL ||
  60             amdtp_stream_pcm_running(&tscm->rx_stream) ||
  61             amdtp_stream_pcm_running(&tscm->tx_stream)) {
  62                 err = snd_tscm_stream_get_rate(tscm, &rate);
  63                 if (err < 0)
  64                         goto err_locked;
  65                 substream->runtime->hw.rate_min = rate;
  66                 substream->runtime->hw.rate_max = rate;
  67         }
  68
  69         snd_pcm_set_sync(substream);
  70 end:
  71         return err;
  72 err_locked:
  73         snd_tscm_stream_lock_release(tscm);
  74         return err;
  75 }
  76
  77 static int pcm_close(struct snd_pcm_substream *substream)
  78 {
  79         struct snd_tscm *tscm = substream->private_data;
  80
  81         snd_tscm_stream_lock_release(tscm);
  82
  83         return 0;
  84 }
  85
  86 static int pcm_hw_params(struct snd_pcm_substream *substream,
  87                          struct snd_pcm_hw_params *hw_params)
  88 {
  89         struct snd_tscm *tscm = substream->private_data;
  90         int err;
  91
  92         err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
  93                                                params_buffer_bytes(hw_params));
  94         if (err < 0)
  95                 return err;
  96
  97         if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
  98                 unsigned int rate = params_rate(hw_params);
  99
 100                 mutex_lock(&tscm->mutex);
 101                 err = snd_tscm_stream_reserve_duplex(tscm, rate);
 102                 if (err >= 0)
 103                         ++tscm->substreams_counter;
 104                 mutex_unlock(&tscm->mutex);
 105         }
 106
 107         return err;
 108 }
 109
 110 static int pcm_hw_free(struct snd_pcm_substream *substream)
 111 {
 112         struct snd_tscm *tscm = substream->private_data;
 113
 114         mutex_lock(&tscm->mutex);
 115
 116         if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
 117                 --tscm->substreams_counter;
 118
 119         snd_tscm_stream_stop_duplex(tscm);
 120
 121         mutex_unlock(&tscm->mutex);
 122
 123         return snd_pcm_lib_free_vmalloc_buffer(substream);
 124 }
 125
 126 static int pcm_capture_prepare(struct snd_pcm_substream *substream)
 127 {
 128         struct snd_tscm *tscm = substream->private_data;
 129         struct snd_pcm_runtime *runtime = substream->runtime;
 130         int err;
 131
 132         mutex_lock(&tscm->mutex);
 133
 134         err = snd_tscm_stream_start_duplex(tscm, runtime->rate);
 135         if (err >= 0)
 136                 amdtp_stream_pcm_prepare(&tscm->tx_stream);
 137
 138         mutex_unlock(&tscm->mutex);
 139
 140         return err;
 141 }
 142
 143 static int pcm_playback_prepare(struct snd_pcm_substream *substream)
 144 {
 145         struct snd_tscm *tscm = substream->private_data;
 146         struct snd_pcm_runtime *runtime = substream->runtime;
 147         int err;
 148
 149         mutex_lock(&tscm->mutex);
 150
 151         err = snd_tscm_stream_start_duplex(tscm, runtime->rate);
 152         if (err >= 0)
 153                 amdtp_stream_pcm_prepare(&tscm->rx_stream);
 154
 155         mutex_unlock(&tscm->mutex);
 156
 157         return err;
 158 }
 159
 160 static int pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd)
 161 {
 162         struct snd_tscm *tscm = substream->private_data;
 163
 164         switch (cmd) {
 165         case SNDRV_PCM_TRIGGER_START:
 166                 amdtp_stream_pcm_trigger(&tscm->tx_stream, substream);
 167                 break;
 168         case SNDRV_PCM_TRIGGER_STOP:
 169                 amdtp_stream_pcm_trigger(&tscm->tx_stream, NULL);
 170                 break;
 171         default:
 172                 return -EINVAL;
 173         }
 174
 175         return 0;
 176 }
 177
 178 static int pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd)
 179 {
 180         struct snd_tscm *tscm = substream->private_data;
 181
 182         switch (cmd) {
 183         case SNDRV_PCM_TRIGGER_START:
 184                 amdtp_stream_pcm_trigger(&tscm->rx_stream, substream);
 185                 break;
 186         case SNDRV_PCM_TRIGGER_STOP:
 187                 amdtp_stream_pcm_trigger(&tscm->rx_stream, NULL);
 188                 break;
 189         default:
 190                 return -EINVAL;
 191         }
 192
 193         return 0;
 194 }
 195
 196 static snd_pcm_uframes_t pcm_capture_pointer(struct snd_pcm_substream *sbstrm)
 197 {
 198         struct snd_tscm *tscm = sbstrm->private_data;
 199
 200         return amdtp_stream_pcm_pointer(&tscm->tx_stream);
 201 }
 202
 203 static snd_pcm_uframes_t pcm_playback_pointer(struct snd_pcm_substream *sbstrm)
 204 {
 205         struct snd_tscm *tscm = sbstrm->private_data;
 206
 207         return amdtp_stream_pcm_pointer(&tscm->rx_stream);
 208 }
 209
 210 static int pcm_capture_ack(struct snd_pcm_substream *substream)
 211 {
 212         struct snd_tscm *tscm = substream->private_data;
 213
 214         return amdtp_stream_pcm_ack(&tscm->tx_stream);
 215 }
 216
 217 static int pcm_playback_ack(struct snd_pcm_substream *substream)
 218 {
 219         struct snd_tscm *tscm = substream->private_data;
 220
 221         return amdtp_stream_pcm_ack(&tscm->rx_stream);
 222 }
 223
 224 int snd_tscm_create_pcm_devices(struct snd_tscm *tscm)
 225 {
 226         static const struct snd_pcm_ops capture_ops = {
 227                 .open           = pcm_open,
 228                 .close          = pcm_close,
 229                 .ioctl          = snd_pcm_lib_ioctl,
 230                 .hw_params      = pcm_hw_params,
 231                 .hw_free        = pcm_hw_free,
 232                 .prepare        = pcm_capture_prepare,
 233                 .trigger        = pcm_capture_trigger,
 234                 .pointer        = pcm_capture_pointer,
 235                 .ack            = pcm_capture_ack,
 236                 .page           = snd_pcm_lib_get_vmalloc_page,
 237         };
 238         static const struct snd_pcm_ops playback_ops = {
 239                 .open           = pcm_open,
 240                 .close          = pcm_close,
 241                 .ioctl          = snd_pcm_lib_ioctl,
 242                 .hw_params      = pcm_hw_params,
 243                 .hw_free        = pcm_hw_free,
 244                 .prepare        = pcm_playback_prepare,
 245                 .trigger        = pcm_playback_trigger,
 246                 .pointer        = pcm_playback_pointer,
 247                 .ack            = pcm_playback_ack,
 248                 .page           = snd_pcm_lib_get_vmalloc_page,
 249         };
 250         struct snd_pcm *pcm;
 251         int err;
 252
 253         err = snd_pcm_new(tscm->card, tscm->card->driver, 0, 1, 1, &pcm);
 254         if (err < 0)
 255                 return err;
 256
 257         pcm->private_data = tscm;
 258         snprintf(pcm->name, sizeof(pcm->name),
 259                  "%s PCM", tscm->card->shortname);
 260         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &playback_ops);
 261         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &capture_ops);
 262
 263         return 0;
 264 }