sound/firewire/digi00x/digi00x-pcm.c

   1 /*
   2  * digi00x-pcm.c - a part of driver for Digidesign Digi 002/003 family
   3  *
   4  * Copyright (c) 2014-2015 Takashi Sakamoto
   5  *
   6  * Licensed under the terms of the GNU General Public License, version 2.
   7  */
   8
   9 #include "digi00x.h"
  10
  11 static int hw_rule_rate(struct snd_pcm_hw_params *params,
  12                         struct snd_pcm_hw_rule *rule)
  13 {
  14         struct snd_interval *r =
  15                 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
  16         const struct snd_interval *c =
  17                 hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_CHANNELS);
  18         struct snd_interval t = {
  19                 .min = UINT_MAX, .max = 0, .integer = 1,
  20         };
  21         unsigned int i;
  22
  23         for (i = 0; i < SND_DG00X_RATE_COUNT; i++) {
  24                 if (!snd_interval_test(c,
  25                                        snd_dg00x_stream_pcm_channels[i]))
  26                         continue;
  27
  28                 t.min = min(t.min, snd_dg00x_stream_rates[i]);
  29                 t.max = max(t.max, snd_dg00x_stream_rates[i]);
  30         }
  31
  32         return snd_interval_refine(r, &t);
  33 }
  34
  35 static int hw_rule_channels(struct snd_pcm_hw_params *params,
  36                             struct snd_pcm_hw_rule *rule)
  37 {
  38         struct snd_interval *c =
  39                 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
  40         const struct snd_interval *r =
  41                 hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_RATE);
  42         struct snd_interval t = {
  43                 .min = UINT_MAX, .max = 0, .integer = 1,
  44         };
  45         unsigned int i;
  46
  47         for (i = 0; i < SND_DG00X_RATE_COUNT; i++) {
  48                 if (!snd_interval_test(r, snd_dg00x_stream_rates[i]))
  49                         continue;
  50
  51                 t.min = min(t.min, snd_dg00x_stream_pcm_channels[i]);
  52                 t.max = max(t.max, snd_dg00x_stream_pcm_channels[i]);
  53         }
  54
  55         return snd_interval_refine(c, &t);
  56 }
  57
  58 static int pcm_init_hw_params(struct snd_dg00x *dg00x,
  59                               struct snd_pcm_substream *substream)
  60 {
  61         static const struct snd_pcm_hardware hardware = {
  62                 .info = SNDRV_PCM_INFO_BATCH |
  63                         SNDRV_PCM_INFO_BLOCK_TRANSFER |
  64                         SNDRV_PCM_INFO_INTERLEAVED |
  65                         SNDRV_PCM_INFO_JOINT_DUPLEX |
  66                         SNDRV_PCM_INFO_MMAP |
  67                         SNDRV_PCM_INFO_MMAP_VALID,
  68                 .rates = SNDRV_PCM_RATE_44100 |
  69                          SNDRV_PCM_RATE_48000 |
  70                          SNDRV_PCM_RATE_88200 |
  71                          SNDRV_PCM_RATE_96000,
  72                 .rate_min = 44100,
  73                 .rate_max = 96000,
  74                 .channels_min = 10,
  75                 .channels_max = 18,
  76                 .period_bytes_min = 4 * 18,
  77                 .period_bytes_max = 4 * 18 * 2048,
  78                 .buffer_bytes_max = 4 * 18 * 2048 * 2,
  79                 .periods_min = 2,
  80                 .periods_max = UINT_MAX,
  81         };
  82         struct amdtp_stream *s;
  83         int err;
  84
  85         substream->runtime->hw = hardware;
  86
  87         if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
  88                 substream->runtime->hw.formats = SNDRV_PCM_FMTBIT_S32;
  89                 s = &dg00x->tx_stream;
  90         } else {
  91                 substream->runtime->hw.formats = SNDRV_PCM_FMTBIT_S16 |
  92                                                  SNDRV_PCM_FMTBIT_S32;
  93                 s = &dg00x->rx_stream;
  94         }
  95
  96         err = snd_pcm_hw_rule_add(substream->runtime, 0,
  97                                   SNDRV_PCM_HW_PARAM_CHANNELS,
  98                                   hw_rule_channels, NULL,
  99                                   SNDRV_PCM_HW_PARAM_RATE, -1);
 100         if (err < 0)
 101                 return err;
 102
 103         err = snd_pcm_hw_rule_add(substream->runtime, 0,
 104                                   SNDRV_PCM_HW_PARAM_RATE,
 105                                   hw_rule_rate, NULL,
 106                                   SNDRV_PCM_HW_PARAM_CHANNELS, -1);
 107         if (err < 0)
 108                 return err;
 109
 110         return amdtp_dot_add_pcm_hw_constraints(s, substream->runtime);
 111 }
 112
 113 static int pcm_open(struct snd_pcm_substream *substream)
 114 {
 115         struct snd_dg00x *dg00x = substream->private_data;
 116         enum snd_dg00x_clock clock;
 117         bool detect;
 118         unsigned int rate;
 119         int err;
 120
 121         err = snd_dg00x_stream_lock_try(dg00x);
 122         if (err < 0)
 123                 goto end;
 124
 125         err = pcm_init_hw_params(dg00x, substream);
 126         if (err < 0)
 127                 goto err_locked;
 128
 129         /* Check current clock source. */
 130         err = snd_dg00x_stream_get_clock(dg00x, &clock);
 131         if (err < 0)
 132                 goto err_locked;
 133         if (clock != SND_DG00X_CLOCK_INTERNAL) {
 134                 err = snd_dg00x_stream_check_external_clock(dg00x, &detect);
 135                 if (err < 0)
 136                         goto err_locked;
 137                 if (!detect) {
 138                         err = -EBUSY;
 139                         goto err_locked;
 140                 }
 141         }
 142
 143         if ((clock != SND_DG00X_CLOCK_INTERNAL) ||
 144             amdtp_stream_pcm_running(&dg00x->rx_stream) ||
 145             amdtp_stream_pcm_running(&dg00x->tx_stream)) {
 146                 err = snd_dg00x_stream_get_external_rate(dg00x, &rate);
 147                 if (err < 0)
 148                         goto err_locked;
 149                 substream->runtime->hw.rate_min = rate;
 150                 substream->runtime->hw.rate_max = rate;
 151         }
 152
 153         snd_pcm_set_sync(substream);
 154 end:
 155         return err;
 156 err_locked:
 157         snd_dg00x_stream_lock_release(dg00x);
 158         return err;
 159 }
 160
 161 static int pcm_close(struct snd_pcm_substream *substream)
 162 {
 163         struct snd_dg00x *dg00x = substream->private_data;
 164
 165         snd_dg00x_stream_lock_release(dg00x);
 166
 167         return 0;
 168 }
 169
 170 static int pcm_capture_hw_params(struct snd_pcm_substream *substream,
 171                                  struct snd_pcm_hw_params *hw_params)
 172 {
 173         struct snd_dg00x *dg00x = substream->private_data;
 174         int err;
 175
 176         err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
 177                                                params_buffer_bytes(hw_params));
 178         if (err < 0)
 179                 return err;
 180
 181         if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
 182                 mutex_lock(&dg00x->mutex);
 183                 dg00x->substreams_counter++;
 184                 mutex_unlock(&dg00x->mutex);
 185         }
 186
 187         amdtp_dot_set_pcm_format(&dg00x->tx_stream, params_format(hw_params));
 188
 189         return 0;
 190 }
 191
 192 static int pcm_playback_hw_params(struct snd_pcm_substream *substream,
 193                                   struct snd_pcm_hw_params *hw_params)
 194 {
 195         struct snd_dg00x *dg00x = substream->private_data;
 196         int err;
 197
 198         err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
 199                                                params_buffer_bytes(hw_params));
 200         if (err < 0)
 201                 return err;
 202
 203         if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
 204                 mutex_lock(&dg00x->mutex);
 205                 dg00x->substreams_counter++;
 206                 mutex_unlock(&dg00x->mutex);
 207         }
 208
 209         amdtp_dot_set_pcm_format(&dg00x->rx_stream, params_format(hw_params));
 210
 211         return 0;
 212 }
 213
 214 static int pcm_capture_hw_free(struct snd_pcm_substream *substream)
 215 {
 216         struct snd_dg00x *dg00x = substream->private_data;
 217
 218         mutex_lock(&dg00x->mutex);
 219
 220         if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
 221                 dg00x->substreams_counter--;
 222
 223         snd_dg00x_stream_stop_duplex(dg00x);
 224
 225         mutex_unlock(&dg00x->mutex);
 226
 227         return snd_pcm_lib_free_vmalloc_buffer(substream);
 228 }
 229
 230 static int pcm_playback_hw_free(struct snd_pcm_substream *substream)
 231 {
 232         struct snd_dg00x *dg00x = substream->private_data;
 233
 234         mutex_lock(&dg00x->mutex);
 235
 236         if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
 237                 dg00x->substreams_counter--;
 238
 239         snd_dg00x_stream_stop_duplex(dg00x);
 240
 241         mutex_unlock(&dg00x->mutex);
 242
 243         return snd_pcm_lib_free_vmalloc_buffer(substream);
 244 }
 245
 246 static int pcm_capture_prepare(struct snd_pcm_substream *substream)
 247 {
 248         struct snd_dg00x *dg00x = substream->private_data;
 249         struct snd_pcm_runtime *runtime = substream->runtime;
 250         int err;
 251
 252         mutex_lock(&dg00x->mutex);
 253
 254         err = snd_dg00x_stream_start_duplex(dg00x, runtime->rate);
 255         if (err >= 0)
 256                 amdtp_stream_pcm_prepare(&dg00x->tx_stream);
 257
 258         mutex_unlock(&dg00x->mutex);
 259
 260         return err;
 261 }
 262
 263 static int pcm_playback_prepare(struct snd_pcm_substream *substream)
 264 {
 265         struct snd_dg00x *dg00x = substream->private_data;
 266         struct snd_pcm_runtime *runtime = substream->runtime;
 267         int err;
 268
 269         mutex_lock(&dg00x->mutex);
 270
 271         err = snd_dg00x_stream_start_duplex(dg00x, runtime->rate);
 272         if (err >= 0) {
 273                 amdtp_stream_pcm_prepare(&dg00x->rx_stream);
 274                 amdtp_dot_reset(&dg00x->rx_stream);
 275         }
 276
 277         mutex_unlock(&dg00x->mutex);
 278
 279         return err;
 280 }
 281
 282 static int pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd)
 283 {
 284         struct snd_dg00x *dg00x = substream->private_data;
 285
 286         switch (cmd) {
 287         case SNDRV_PCM_TRIGGER_START:
 288                 amdtp_stream_pcm_trigger(&dg00x->tx_stream, substream);
 289                 break;
 290         case SNDRV_PCM_TRIGGER_STOP:
 291                 amdtp_stream_pcm_trigger(&dg00x->tx_stream, NULL);
 292                 break;
 293         default:
 294                 return -EINVAL;
 295         }
 296
 297         return 0;
 298 }
 299
 300 static int pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd)
 301 {
 302         struct snd_dg00x *dg00x = substream->private_data;
 303
 304         switch (cmd) {
 305         case SNDRV_PCM_TRIGGER_START:
 306                 amdtp_stream_pcm_trigger(&dg00x->rx_stream, substream);
 307                 break;
 308         case SNDRV_PCM_TRIGGER_STOP:
 309                 amdtp_stream_pcm_trigger(&dg00x->rx_stream, NULL);
 310                 break;
 311         default:
 312                 return -EINVAL;
 313         }
 314
 315         return 0;
 316 }
 317
 318 static snd_pcm_uframes_t pcm_capture_pointer(struct snd_pcm_substream *sbstrm)
 319 {
 320         struct snd_dg00x *dg00x = sbstrm->private_data;
 321
 322         return amdtp_stream_pcm_pointer(&dg00x->tx_stream);
 323 }
 324
 325 static snd_pcm_uframes_t pcm_playback_pointer(struct snd_pcm_substream *sbstrm)
 326 {
 327         struct snd_dg00x *dg00x = sbstrm->private_data;
 328
 329         return amdtp_stream_pcm_pointer(&dg00x->rx_stream);
 330 }
 331
 332 static struct snd_pcm_ops pcm_capture_ops = {
 333         .open           = pcm_open,
 334         .close          = pcm_close,
 335         .ioctl          = snd_pcm_lib_ioctl,
 336         .hw_params      = pcm_capture_hw_params,
 337         .hw_free        = pcm_capture_hw_free,
 338         .prepare        = pcm_capture_prepare,
 339         .trigger        = pcm_capture_trigger,
 340         .pointer        = pcm_capture_pointer,
 341         .page           = snd_pcm_lib_get_vmalloc_page,
 342 };
 343
 344 static struct snd_pcm_ops pcm_playback_ops = {
 345         .open           = pcm_open,
 346         .close          = pcm_close,
 347         .ioctl          = snd_pcm_lib_ioctl,
 348         .hw_params      = pcm_playback_hw_params,
 349         .hw_free        = pcm_playback_hw_free,
 350         .prepare        = pcm_playback_prepare,
 351         .trigger        = pcm_playback_trigger,
 352         .pointer        = pcm_playback_pointer,
 353         .page           = snd_pcm_lib_get_vmalloc_page,
 354         .mmap           = snd_pcm_lib_mmap_vmalloc,
 355 };
 356
 357 int snd_dg00x_create_pcm_devices(struct snd_dg00x *dg00x)
 358 {
 359         struct snd_pcm *pcm;
 360         int err;
 361
 362         err = snd_pcm_new(dg00x->card, dg00x->card->driver, 0, 1, 1, &pcm);
 363         if (err < 0)
 364                 return err;
 365
 366         pcm->private_data = dg00x;
 367         snprintf(pcm->name, sizeof(pcm->name),
 368                  "%s PCM", dg00x->card->shortname);
 369         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &pcm_playback_ops);
 370         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &pcm_capture_ops);
 371
 372         return 0;
 373 }