sound/firewire/fireface/ff-pcm.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * ff-pcm.c - a part of driver for RME Fireface series
   4  *
   5  * Copyright (c) 2015-2017 Takashi Sakamoto
   6  */
   7
   8 #include "ff.h"
   9
  10 static int hw_rule_rate(struct snd_pcm_hw_params *params,
  11                         struct snd_pcm_hw_rule *rule)
  12 {
  13         const unsigned int *pcm_channels = rule->private;
  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 < ARRAY_SIZE(amdtp_rate_table); i++) {
  24                 enum snd_ff_stream_mode mode;
  25                 int err;
  26
  27                 err = snd_ff_stream_get_multiplier_mode(i, &mode);
  28                 if (err < 0)
  29                         continue;
  30
  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;
  53
  54         for (i = 0; i < ARRAY_SIZE(amdtp_rate_table); i++) {
  55                 enum snd_ff_stream_mode mode;
  56                 int err;
  57
  58                 err = snd_ff_stream_get_multiplier_mode(i, &mode);
  59                 if (err < 0)
  60                         continue;
  61
  62                 if (!snd_interval_test(r, amdtp_rate_table[i]))
  63                         continue;
  64
  65                 t.min = min(t.min, pcm_channels[mode]);
  66                 t.max = max(t.max, pcm_channels[mode]);
  67         }
  68
  69         return snd_interval_refine(c, &t);
  70 }
  71
  72 static void limit_channels_and_rates(struct snd_pcm_hardware *hw,
  73                                      const unsigned int *pcm_channels)
  74 {
  75         unsigned int rate, channels;
  76         int i;
  77
  78         hw->channels_min = UINT_MAX;
  79         hw->channels_max = 0;
  80         hw->rate_min = UINT_MAX;
  81         hw->rate_max = 0;
  82
  83         for (i = 0; i < ARRAY_SIZE(amdtp_rate_table); i++) {
  84                 enum snd_ff_stream_mode mode;
  85                 int err;
  86
  87                 err = snd_ff_stream_get_multiplier_mode(i, &mode);
  88                 if (err < 0)
  89                         continue;
  90
  91                 channels = pcm_channels[mode];
  92                 if (pcm_channels[mode] == 0)
  93                         continue;
  94                 hw->channels_min = min(hw->channels_min, channels);
  95                 hw->channels_max = max(hw->channels_max, channels);
  96
  97                 rate = amdtp_rate_table[i];
  98                 hw->rates |= snd_pcm_rate_to_rate_bit(rate);
  99                 hw->rate_min = min(hw->rate_min, rate);
 100                 hw->rate_max = max(hw->rate_max, rate);
 101         }
 102 }
 103
 104 static int pcm_init_hw_params(struct snd_ff *ff,
 105                               struct snd_pcm_substream *substream)
 106 {
 107         struct snd_pcm_runtime *runtime = substream->runtime;
 108         struct amdtp_stream *s;
 109         const unsigned int *pcm_channels;
 110         int err;
 111
 112         if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
 113                 runtime->hw.formats = SNDRV_PCM_FMTBIT_S32;
 114                 s = &ff->tx_stream;
 115                 pcm_channels = ff->spec->pcm_capture_channels;
 116         } else {
 117                 runtime->hw.formats = SNDRV_PCM_FMTBIT_S32;
 118                 s = &ff->rx_stream;
 119                 pcm_channels = ff->spec->pcm_playback_channels;
 120         }
 121
 122         limit_channels_and_rates(&runtime->hw, pcm_channels);
 123
 124         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
 125                                   hw_rule_channels, (void *)pcm_channels,
 126                                   SNDRV_PCM_HW_PARAM_RATE, -1);
 127         if (err < 0)
 128                 return err;
 129
 130         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
 131                                   hw_rule_rate, (void *)pcm_channels,
 132                                   SNDRV_PCM_HW_PARAM_CHANNELS, -1);
 133         if (err < 0)
 134                 return err;
 135
 136         return amdtp_ff_add_pcm_hw_constraints(s, runtime);
 137 }
 138
 139 static int pcm_open(struct snd_pcm_substream *substream)
 140 {
 141         struct snd_ff *ff = substream->private_data;
 142         unsigned int rate;
 143         enum snd_ff_clock_src src;
 144         int i, err;
 145
 146         err = snd_ff_stream_lock_try(ff);
 147         if (err < 0)
 148                 return err;
 149
 150         err = pcm_init_hw_params(ff, substream);
 151         if (err < 0)
 152                 goto release_lock;
 153
 154         err = ff->spec->protocol->get_clock(ff, &rate, &src);
 155         if (err < 0)
 156                 goto release_lock;
 157
 158         if (src != SND_FF_CLOCK_SRC_INTERNAL) {
 159                 for (i = 0; i < CIP_SFC_COUNT; ++i) {
 160                         if (amdtp_rate_table[i] == rate)
 161                                 break;
 162                 }
 163                 /*
 164                  * The unit is configured at sampling frequency which packet
 165                  * streaming engine can't support.
 166                  */
 167                 if (i >= CIP_SFC_COUNT) {
 168                         err = -EIO;
 169                         goto release_lock;
 170                 }
 171
 172                 substream->runtime->hw.rate_min = rate;
 173                 substream->runtime->hw.rate_max = rate;
 174         } else {
 175                 if (amdtp_stream_pcm_running(&ff->rx_stream) ||
 176                     amdtp_stream_pcm_running(&ff->tx_stream)) {
 177                         rate = amdtp_rate_table[ff->rx_stream.sfc];
 178                         substream->runtime->hw.rate_min = rate;
 179                         substream->runtime->hw.rate_max = rate;
 180                 }
 181         }
 182
 183         snd_pcm_set_sync(substream);
 184
 185         return 0;
 186
 187 release_lock:
 188         snd_ff_stream_lock_release(ff);
 189         return err;
 190 }
 191
 192 static int pcm_close(struct snd_pcm_substream *substream)
 193 {
 194         struct snd_ff *ff = substream->private_data;
 195
 196         snd_ff_stream_lock_release(ff);
 197
 198         return 0;
 199 }
 200
 201 static int pcm_hw_params(struct snd_pcm_substream *substream,
 202                          struct snd_pcm_hw_params *hw_params)
 203 {
 204         struct snd_ff *ff = substream->private_data;
 205         int err;
 206
 207         err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
 208                                                params_buffer_bytes(hw_params));
 209         if (err < 0)
 210                 return err;
 211
 212         if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
 213                 unsigned int rate = params_rate(hw_params);
 214
 215                 mutex_lock(&ff->mutex);
 216                 err = snd_ff_stream_reserve_duplex(ff, rate);
 217                 if (err >= 0)
 218                         ++ff->substreams_counter;
 219                 mutex_unlock(&ff->mutex);
 220         }
 221
 222         return 0;
 223 }
 224
 225 static int pcm_hw_free(struct snd_pcm_substream *substream)
 226 {
 227         struct snd_ff *ff = substream->private_data;
 228
 229         mutex_lock(&ff->mutex);
 230
 231         if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
 232                 --ff->substreams_counter;
 233
 234         snd_ff_stream_stop_duplex(ff);
 235
 236         mutex_unlock(&ff->mutex);
 237
 238         return snd_pcm_lib_free_vmalloc_buffer(substream);
 239 }
 240
 241 static int pcm_capture_prepare(struct snd_pcm_substream *substream)
 242 {
 243         struct snd_ff *ff = substream->private_data;
 244         struct snd_pcm_runtime *runtime = substream->runtime;
 245         int err;
 246
 247         mutex_lock(&ff->mutex);
 248
 249         err = snd_ff_stream_start_duplex(ff, runtime->rate);
 250         if (err >= 0)
 251                 amdtp_stream_pcm_prepare(&ff->tx_stream);
 252
 253         mutex_unlock(&ff->mutex);
 254
 255         return err;
 256 }
 257
 258 static int pcm_playback_prepare(struct snd_pcm_substream *substream)
 259 {
 260         struct snd_ff *ff = substream->private_data;
 261         struct snd_pcm_runtime *runtime = substream->runtime;
 262         int err;
 263
 264         mutex_lock(&ff->mutex);
 265
 266         err = snd_ff_stream_start_duplex(ff, runtime->rate);
 267         if (err >= 0)
 268                 amdtp_stream_pcm_prepare(&ff->rx_stream);
 269
 270         mutex_unlock(&ff->mutex);
 271
 272         return err;
 273 }
 274
 275 static int pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd)
 276 {
 277         struct snd_ff *ff = substream->private_data;
 278
 279         switch (cmd) {
 280         case SNDRV_PCM_TRIGGER_START:
 281                 amdtp_stream_pcm_trigger(&ff->tx_stream, substream);
 282                 break;
 283         case SNDRV_PCM_TRIGGER_STOP:
 284                 amdtp_stream_pcm_trigger(&ff->tx_stream, NULL);
 285                 break;
 286         default:
 287                 return -EINVAL;
 288         }
 289
 290         return 0;
 291 }
 292
 293 static int pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd)
 294 {
 295         struct snd_ff *ff = substream->private_data;
 296
 297         switch (cmd) {
 298         case SNDRV_PCM_TRIGGER_START:
 299                 amdtp_stream_pcm_trigger(&ff->rx_stream, substream);
 300                 break;
 301         case SNDRV_PCM_TRIGGER_STOP:
 302                 amdtp_stream_pcm_trigger(&ff->rx_stream, NULL);
 303                 break;
 304         default:
 305                 return -EINVAL;
 306         }
 307
 308         return 0;
 309 }
 310
 311 static snd_pcm_uframes_t pcm_capture_pointer(struct snd_pcm_substream *sbstrm)
 312 {
 313         struct snd_ff *ff = sbstrm->private_data;
 314
 315         return amdtp_stream_pcm_pointer(&ff->tx_stream);
 316 }
 317
 318 static snd_pcm_uframes_t pcm_playback_pointer(struct snd_pcm_substream *sbstrm)
 319 {
 320         struct snd_ff *ff = sbstrm->private_data;
 321
 322         return amdtp_stream_pcm_pointer(&ff->rx_stream);
 323 }
 324
 325 static int pcm_capture_ack(struct snd_pcm_substream *substream)
 326 {
 327         struct snd_ff *ff = substream->private_data;
 328
 329         return amdtp_stream_pcm_ack(&ff->tx_stream);
 330 }
 331
 332 static int pcm_playback_ack(struct snd_pcm_substream *substream)
 333 {
 334         struct snd_ff *ff = substream->private_data;
 335
 336         return amdtp_stream_pcm_ack(&ff->rx_stream);
 337 }
 338
 339 int snd_ff_create_pcm_devices(struct snd_ff *ff)
 340 {
 341         static const struct snd_pcm_ops pcm_capture_ops = {
 342                 .open           = pcm_open,
 343                 .close          = pcm_close,
 344                 .ioctl          = snd_pcm_lib_ioctl,
 345                 .hw_params      = pcm_hw_params,
 346                 .hw_free        = pcm_hw_free,
 347                 .prepare        = pcm_capture_prepare,
 348                 .trigger        = pcm_capture_trigger,
 349                 .pointer        = pcm_capture_pointer,
 350                 .ack            = pcm_capture_ack,
 351                 .page           = snd_pcm_lib_get_vmalloc_page,
 352         };
 353         static const struct snd_pcm_ops pcm_playback_ops = {
 354                 .open           = pcm_open,
 355                 .close          = pcm_close,
 356                 .ioctl          = snd_pcm_lib_ioctl,
 357                 .hw_params      = pcm_hw_params,
 358                 .hw_free        = pcm_hw_free,
 359                 .prepare        = pcm_playback_prepare,
 360                 .trigger        = pcm_playback_trigger,
 361                 .pointer        = pcm_playback_pointer,
 362                 .ack            = pcm_playback_ack,
 363                 .page           = snd_pcm_lib_get_vmalloc_page,
 364         };
 365         struct snd_pcm *pcm;
 366         int err;
 367
 368         err = snd_pcm_new(ff->card, ff->card->driver, 0, 1, 1, &pcm);
 369         if (err < 0)
 370                 return err;
 371
 372         pcm->private_data = ff;
 373         snprintf(pcm->name, sizeof(pcm->name),
 374                  "%s PCM", ff->card->shortname);
 375         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &pcm_playback_ops);
 376         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &pcm_capture_ops);
 377
 378         return 0;
 379 }