sound/firewire/fireface/ff-pcm.c

   1 /*
   2  * ff-pcm.c - a part of driver for RME Fireface series
   3  *
   4  * Copyright (c) 2015-2017 Takashi Sakamoto
   5  *
   6  * Licensed under the terms of the GNU General Public License, version 2.
   7  */
   8
   9 #include "ff.h"
  10
  11 static inline unsigned int get_multiplier_mode_with_index(unsigned int index)
  12 {
  13         return ((int)index - 1) / 2;
  14 }
  15
  16 static int hw_rule_rate(struct snd_pcm_hw_params *params,
  17                         struct snd_pcm_hw_rule *rule)
  18 {
  19         const unsigned int *pcm_channels = rule->private;
  20         struct snd_interval *r =
  21                 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
  22         const struct snd_interval *c =
  23                 hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_CHANNELS);
  24         struct snd_interval t = {
  25                 .min = UINT_MAX, .max = 0, .integer = 1
  26         };
  27         unsigned int i, mode;
  28
  29         for (i = 0; i < ARRAY_SIZE(amdtp_rate_table); i++) {
  30                 mode = get_multiplier_mode_with_index(i);
  31                 if (!snd_interval_test(c, pcm_channels[mode]))
  32                         continue;
  33
  34                 t.min = min(t.min, amdtp_rate_table[i]);
  35                 t.max = max(t.max, amdtp_rate_table[i]);
  36         }
  37
  38         return snd_interval_refine(r, &t);
  39 }
  40
  41 static int hw_rule_channels(struct snd_pcm_hw_params *params,
  42                             struct snd_pcm_hw_rule *rule)
  43 {
  44         const unsigned int *pcm_channels = rule->private;
  45         struct snd_interval *c =
  46                 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
  47         const struct snd_interval *r =
  48                 hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_RATE);
  49         struct snd_interval t = {
  50                 .min = UINT_MAX, .max = 0, .integer = 1
  51         };
  52         unsigned int i, mode;
  53
  54         for (i = 0; i < ARRAY_SIZE(amdtp_rate_table); i++) {
  55                 mode = get_multiplier_mode_with_index(i);
  56                 if (!snd_interval_test(r, amdtp_rate_table[i]))
  57                         continue;
  58
  59                 t.min = min(t.min, pcm_channels[mode]);
  60                 t.max = max(t.max, pcm_channels[mode]);
  61         }
  62
  63         return snd_interval_refine(c, &t);
  64 }
  65
  66 static void limit_channels_and_rates(struct snd_pcm_hardware *hw,
  67                                      const unsigned int *pcm_channels)
  68 {
  69         unsigned int mode;
  70         unsigned int rate, channels;
  71         int i;
  72
  73         hw->channels_min = UINT_MAX;
  74         hw->channels_max = 0;
  75         hw->rate_min = UINT_MAX;
  76         hw->rate_max = 0;
  77
  78         for (i = 0; i < ARRAY_SIZE(amdtp_rate_table); i++) {
  79                 mode = get_multiplier_mode_with_index(i);
  80
  81                 channels = pcm_channels[mode];
  82                 if (pcm_channels[mode] == 0)
  83                         continue;
  84                 hw->channels_min = min(hw->channels_min, channels);
  85                 hw->channels_max = max(hw->channels_max, channels);
  86
  87                 rate = amdtp_rate_table[i];
  88                 hw->rates |= snd_pcm_rate_to_rate_bit(rate);
  89                 hw->rate_min = min(hw->rate_min, rate);
  90                 hw->rate_max = max(hw->rate_max, rate);
  91         }
  92 }
  93
  94 static int pcm_init_hw_params(struct snd_ff *ff,
  95                               struct snd_pcm_substream *substream)
  96 {
  97         struct snd_pcm_runtime *runtime = substream->runtime;
  98         struct amdtp_stream *s;
  99         const unsigned int *pcm_channels;
 100         int err;
 101
 102         if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
 103                 runtime->hw.formats = SNDRV_PCM_FMTBIT_S32;
 104                 s = &ff->tx_stream;
 105                 pcm_channels = ff->spec->pcm_capture_channels;
 106         } else {
 107                 runtime->hw.formats = SNDRV_PCM_FMTBIT_S32;
 108                 s = &ff->rx_stream;
 109                 pcm_channels = ff->spec->pcm_playback_channels;
 110         }
 111
 112         limit_channels_and_rates(&runtime->hw, pcm_channels);
 113
 114         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
 115                                   hw_rule_channels, (void *)pcm_channels,
 116                                   SNDRV_PCM_HW_PARAM_RATE, -1);
 117         if (err < 0)
 118                 return err;
 119
 120         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
 121                                   hw_rule_rate, (void *)pcm_channels,
 122                                   SNDRV_PCM_HW_PARAM_CHANNELS, -1);
 123         if (err < 0)
 124                 return err;
 125
 126         return amdtp_ff_add_pcm_hw_constraints(s, runtime);
 127 }
 128
 129 static int pcm_open(struct snd_pcm_substream *substream)
 130 {
 131         struct snd_ff *ff = substream->private_data;
 132         unsigned int rate;
 133         enum snd_ff_clock_src src;
 134         int i, err;
 135
 136         err = snd_ff_stream_lock_try(ff);
 137         if (err < 0)
 138                 return err;
 139
 140         err = pcm_init_hw_params(ff, substream);
 141         if (err < 0)
 142                 goto release_lock;
 143
 144         err = ff->spec->protocol->get_clock(ff, &rate, &src);
 145         if (err < 0)
 146                 goto release_lock;
 147
 148         if (src != SND_FF_CLOCK_SRC_INTERNAL) {
 149                 for (i = 0; i < CIP_SFC_COUNT; ++i) {
 150                         if (amdtp_rate_table[i] == rate)
 151                                 break;
 152                 }
 153                 /*
 154                  * The unit is configured at sampling frequency which packet
 155                  * streaming engine can't support.
 156                  */
 157                 if (i >= CIP_SFC_COUNT) {
 158                         err = -EIO;
 159                         goto release_lock;
 160                 }
 161
 162                 substream->runtime->hw.rate_min = rate;
 163                 substream->runtime->hw.rate_max = rate;
 164         } else {
 165                 if (amdtp_stream_pcm_running(&ff->rx_stream) ||
 166                     amdtp_stream_pcm_running(&ff->tx_stream)) {
 167                         rate = amdtp_rate_table[ff->rx_stream.sfc];
 168                         substream->runtime->hw.rate_min = rate;
 169                         substream->runtime->hw.rate_max = rate;
 170                 }
 171         }
 172
 173         snd_pcm_set_sync(substream);
 174
 175         return 0;
 176
 177 release_lock:
 178         snd_ff_stream_lock_release(ff);
 179         return err;
 180 }
 181
 182 static int pcm_close(struct snd_pcm_substream *substream)
 183 {
 184         struct snd_ff *ff = substream->private_data;
 185
 186         snd_ff_stream_lock_release(ff);
 187
 188         return 0;
 189 }
 190
 191 static int pcm_capture_hw_params(struct snd_pcm_substream *substream,
 192                                  struct snd_pcm_hw_params *hw_params)
 193 {
 194         struct snd_ff *ff = substream->private_data;
 195         int err;
 196
 197         err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
 198                                                params_buffer_bytes(hw_params));
 199         if (err < 0)
 200                 return err;
 201
 202         if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
 203                 mutex_lock(&ff->mutex);
 204                 ff->substreams_counter++;
 205                 mutex_unlock(&ff->mutex);
 206         }
 207
 208         return 0;
 209 }
 210
 211 static int pcm_playback_hw_params(struct snd_pcm_substream *substream,
 212                                   struct snd_pcm_hw_params *hw_params)
 213 {
 214         struct snd_ff *ff = substream->private_data;
 215         int err;
 216
 217         err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
 218                                                params_buffer_bytes(hw_params));
 219         if (err < 0)
 220                 return err;
 221
 222         if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
 223                 mutex_lock(&ff->mutex);
 224                 ff->substreams_counter++;
 225                 mutex_unlock(&ff->mutex);
 226         }
 227
 228         return 0;
 229 }
 230
 231 static int pcm_capture_hw_free(struct snd_pcm_substream *substream)
 232 {
 233         struct snd_ff *ff = substream->private_data;
 234
 235         mutex_lock(&ff->mutex);
 236
 237         if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
 238                 ff->substreams_counter--;
 239
 240         snd_ff_stream_stop_duplex(ff);
 241
 242         mutex_unlock(&ff->mutex);
 243
 244         return snd_pcm_lib_free_vmalloc_buffer(substream);
 245 }
 246
 247 static int pcm_playback_hw_free(struct snd_pcm_substream *substream)
 248 {
 249         struct snd_ff *ff = substream->private_data;
 250
 251         mutex_lock(&ff->mutex);
 252
 253         if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
 254                 ff->substreams_counter--;
 255
 256         snd_ff_stream_stop_duplex(ff);
 257
 258         mutex_unlock(&ff->mutex);
 259
 260         return snd_pcm_lib_free_vmalloc_buffer(substream);
 261 }
 262
 263 static int pcm_capture_prepare(struct snd_pcm_substream *substream)
 264 {
 265         struct snd_ff *ff = substream->private_data;
 266         struct snd_pcm_runtime *runtime = substream->runtime;
 267         int err;
 268
 269         mutex_lock(&ff->mutex);
 270
 271         err = snd_ff_stream_start_duplex(ff, runtime->rate);
 272         if (err >= 0)
 273                 amdtp_stream_pcm_prepare(&ff->tx_stream);
 274
 275         mutex_unlock(&ff->mutex);
 276
 277         return err;
 278 }
 279
 280 static int pcm_playback_prepare(struct snd_pcm_substream *substream)
 281 {
 282         struct snd_ff *ff = substream->private_data;
 283         struct snd_pcm_runtime *runtime = substream->runtime;
 284         int err;
 285
 286         mutex_lock(&ff->mutex);
 287
 288         err = snd_ff_stream_start_duplex(ff, runtime->rate);
 289         if (err >= 0)
 290                 amdtp_stream_pcm_prepare(&ff->rx_stream);
 291
 292         mutex_unlock(&ff->mutex);
 293
 294         return err;
 295 }
 296
 297 static int pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd)
 298 {
 299         struct snd_ff *ff = substream->private_data;
 300
 301         switch (cmd) {
 302         case SNDRV_PCM_TRIGGER_START:
 303                 amdtp_stream_pcm_trigger(&ff->tx_stream, substream);
 304                 break;
 305         case SNDRV_PCM_TRIGGER_STOP:
 306                 amdtp_stream_pcm_trigger(&ff->tx_stream, NULL);
 307                 break;
 308         default:
 309                 return -EINVAL;
 310         }
 311
 312         return 0;
 313 }
 314
 315 static int pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd)
 316 {
 317         struct snd_ff *ff = substream->private_data;
 318
 319         switch (cmd) {
 320         case SNDRV_PCM_TRIGGER_START:
 321                 amdtp_stream_pcm_trigger(&ff->rx_stream, substream);
 322                 break;
 323         case SNDRV_PCM_TRIGGER_STOP:
 324                 amdtp_stream_pcm_trigger(&ff->rx_stream, NULL);
 325                 break;
 326         default:
 327                 return -EINVAL;
 328         }
 329
 330         return 0;
 331 }
 332
 333 static snd_pcm_uframes_t pcm_capture_pointer(struct snd_pcm_substream *sbstrm)
 334 {
 335         struct snd_ff *ff = sbstrm->private_data;
 336
 337         return amdtp_stream_pcm_pointer(&ff->tx_stream);
 338 }
 339
 340 static snd_pcm_uframes_t pcm_playback_pointer(struct snd_pcm_substream *sbstrm)
 341 {
 342         struct snd_ff *ff = sbstrm->private_data;
 343
 344         return amdtp_stream_pcm_pointer(&ff->rx_stream);
 345 }
 346
 347 static int pcm_capture_ack(struct snd_pcm_substream *substream)
 348 {
 349         struct snd_ff *ff = substream->private_data;
 350
 351         return amdtp_stream_pcm_ack(&ff->tx_stream);
 352 }
 353
 354 static int pcm_playback_ack(struct snd_pcm_substream *substream)
 355 {
 356         struct snd_ff *ff = substream->private_data;
 357
 358         return amdtp_stream_pcm_ack(&ff->rx_stream);
 359 }
 360
 361 int snd_ff_create_pcm_devices(struct snd_ff *ff)
 362 {
 363         static const struct snd_pcm_ops pcm_capture_ops = {
 364                 .open           = pcm_open,
 365                 .close          = pcm_close,
 366                 .ioctl          = snd_pcm_lib_ioctl,
 367                 .hw_params      = pcm_capture_hw_params,
 368                 .hw_free        = pcm_capture_hw_free,
 369                 .prepare        = pcm_capture_prepare,
 370                 .trigger        = pcm_capture_trigger,
 371                 .pointer        = pcm_capture_pointer,
 372                 .ack            = pcm_capture_ack,
 373                 .page           = snd_pcm_lib_get_vmalloc_page,
 374         };
 375         static const struct snd_pcm_ops pcm_playback_ops = {
 376                 .open           = pcm_open,
 377                 .close          = pcm_close,
 378                 .ioctl          = snd_pcm_lib_ioctl,
 379                 .hw_params      = pcm_playback_hw_params,
 380                 .hw_free        = pcm_playback_hw_free,
 381                 .prepare        = pcm_playback_prepare,
 382                 .trigger        = pcm_playback_trigger,
 383                 .pointer        = pcm_playback_pointer,
 384                 .ack            = pcm_playback_ack,
 385                 .page           = snd_pcm_lib_get_vmalloc_page,
 386                 .mmap           = snd_pcm_lib_mmap_vmalloc,
 387         };
 388         struct snd_pcm *pcm;
 389         int err;
 390
 391         err = snd_pcm_new(ff->card, ff->card->driver, 0, 1, 1, &pcm);
 392         if (err < 0)
 393                 return err;
 394
 395         pcm->private_data = ff;
 396         snprintf(pcm->name, sizeof(pcm->name),
 397                  "%s PCM", ff->card->shortname);
 398         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &pcm_playback_ops);
 399         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &pcm_capture_ops);
 400
 401         return 0;
 402 }