sound/firewire/oxfw/oxfw-pcm.c

   1 /*
   2  * oxfw_pcm.c - a part of driver for OXFW970/971 based devices
   3  *
   4  * Copyright (c) Clemens Ladisch <clemens@ladisch.de>
   5  * Licensed under the terms of the GNU General Public License, version 2.
   6  */
   7
   8 #include "oxfw.h"
   9
  10 static int hw_rule_rate(struct snd_pcm_hw_params *params,
  11                         struct snd_pcm_hw_rule *rule)
  12 {
  13         u8 **formats = 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         struct snd_oxfw_stream_formation formation;
  22         int i, err;
  23
  24         for (i = 0; i < SND_OXFW_STREAM_FORMAT_ENTRIES; i++) {
  25                 if (formats[i] == NULL)
  26                         continue;
  27
  28                 err = snd_oxfw_stream_parse_format(formats[i], &formation);
  29                 if (err < 0)
  30                         continue;
  31                 if (!snd_interval_test(c, formation.pcm))
  32                         continue;
  33
  34                 t.min = min(t.min, formation.rate);
  35                 t.max = max(t.max, formation.rate);
  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         u8 **formats = 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_oxfw_stream_formation formation;
  50         int i, j, err;
  51         unsigned int count, list[SND_OXFW_STREAM_FORMAT_ENTRIES] = {0};
  52
  53         count = 0;
  54         for (i = 0; i < SND_OXFW_STREAM_FORMAT_ENTRIES; i++) {
  55                 if (formats[i] == NULL)
  56                         break;
  57
  58                 err = snd_oxfw_stream_parse_format(formats[i], &formation);
  59                 if (err < 0)
  60                         continue;
  61                 if (!snd_interval_test(r, formation.rate))
  62                         continue;
  63                 if (list[count] == formation.pcm)
  64                         continue;
  65
  66                 for (j = 0; j < ARRAY_SIZE(list); j++) {
  67                         if (list[j] == formation.pcm)
  68                                 break;
  69                 }
  70                 if (j == ARRAY_SIZE(list)) {
  71                         list[count] = formation.pcm;
  72                         if (++count == ARRAY_SIZE(list))
  73                                 break;
  74                 }
  75         }
  76
  77         return snd_interval_list(c, count, list, 0);
  78 }
  79
  80 static void limit_channels_and_rates(struct snd_pcm_hardware *hw, u8 **formats)
  81 {
  82         struct snd_oxfw_stream_formation formation;
  83         int i, err;
  84
  85         hw->channels_min = UINT_MAX;
  86         hw->channels_max = 0;
  87
  88         hw->rate_min = UINT_MAX;
  89         hw->rate_max = 0;
  90         hw->rates = 0;
  91
  92         for (i = 0; i < SND_OXFW_STREAM_FORMAT_ENTRIES; i++) {
  93                 if (formats[i] == NULL)
  94                         break;
  95
  96                 err = snd_oxfw_stream_parse_format(formats[i], &formation);
  97                 if (err < 0)
  98                         continue;
  99
 100                 hw->channels_min = min(hw->channels_min, formation.pcm);
 101                 hw->channels_max = max(hw->channels_max, formation.pcm);
 102
 103                 hw->rate_min = min(hw->rate_min, formation.rate);
 104                 hw->rate_max = max(hw->rate_max, formation.rate);
 105                 hw->rates |= snd_pcm_rate_to_rate_bit(formation.rate);
 106         }
 107 }
 108
 109 static int init_hw_params(struct snd_oxfw *oxfw,
 110                           struct snd_pcm_substream *substream)
 111 {
 112         struct snd_pcm_runtime *runtime = substream->runtime;
 113         u8 **formats;
 114         struct amdtp_stream *stream;
 115         int err;
 116
 117         if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
 118                 runtime->hw.formats = AM824_IN_PCM_FORMAT_BITS;
 119                 stream = &oxfw->tx_stream;
 120                 formats = oxfw->tx_stream_formats;
 121         } else {
 122                 runtime->hw.formats = AM824_OUT_PCM_FORMAT_BITS;
 123                 stream = &oxfw->rx_stream;
 124                 formats = oxfw->rx_stream_formats;
 125         }
 126
 127         limit_channels_and_rates(&runtime->hw, formats);
 128
 129         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
 130                                   hw_rule_channels, formats,
 131                                   SNDRV_PCM_HW_PARAM_RATE, -1);
 132         if (err < 0)
 133                 goto end;
 134
 135         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
 136                                   hw_rule_rate, formats,
 137                                   SNDRV_PCM_HW_PARAM_CHANNELS, -1);
 138         if (err < 0)
 139                 goto end;
 140
 141         err = amdtp_am824_add_pcm_hw_constraints(stream, runtime);
 142 end:
 143         return err;
 144 }
 145
 146 static int limit_to_current_params(struct snd_pcm_substream *substream)
 147 {
 148         struct snd_oxfw *oxfw = substream->private_data;
 149         struct snd_oxfw_stream_formation formation;
 150         enum avc_general_plug_dir dir;
 151         int err;
 152
 153         if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
 154                 dir = AVC_GENERAL_PLUG_DIR_OUT;
 155         else
 156                 dir = AVC_GENERAL_PLUG_DIR_IN;
 157
 158         err = snd_oxfw_stream_get_current_formation(oxfw, dir, &formation);
 159         if (err < 0)
 160                 goto end;
 161
 162         substream->runtime->hw.channels_min = formation.pcm;
 163         substream->runtime->hw.channels_max = formation.pcm;
 164         substream->runtime->hw.rate_min = formation.rate;
 165         substream->runtime->hw.rate_max = formation.rate;
 166 end:
 167         return err;
 168 }
 169
 170 static int pcm_open(struct snd_pcm_substream *substream)
 171 {
 172         struct snd_oxfw *oxfw = substream->private_data;
 173         int err;
 174
 175         err = snd_oxfw_stream_lock_try(oxfw);
 176         if (err < 0)
 177                 goto end;
 178
 179         err = init_hw_params(oxfw, substream);
 180         if (err < 0)
 181                 goto err_locked;
 182
 183         /*
 184          * When any PCM streams are already running, the available sampling
 185          * rate is limited at current value.
 186          */
 187         if (amdtp_stream_pcm_running(&oxfw->tx_stream) ||
 188             amdtp_stream_pcm_running(&oxfw->rx_stream)) {
 189                 err = limit_to_current_params(substream);
 190                 if (err < 0)
 191                         goto end;
 192         }
 193
 194         snd_pcm_set_sync(substream);
 195 end:
 196         return err;
 197 err_locked:
 198         snd_oxfw_stream_lock_release(oxfw);
 199         return err;
 200 }
 201
 202 static int pcm_close(struct snd_pcm_substream *substream)
 203 {
 204         struct snd_oxfw *oxfw = substream->private_data;
 205
 206         snd_oxfw_stream_lock_release(oxfw);
 207         return 0;
 208 }
 209
 210 static int pcm_capture_hw_params(struct snd_pcm_substream *substream,
 211                                  struct snd_pcm_hw_params *hw_params)
 212 {
 213         struct snd_oxfw *oxfw = substream->private_data;
 214         int err;
 215
 216         err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
 217                                                params_buffer_bytes(hw_params));
 218         if (err < 0)
 219                 return err;
 220
 221         if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
 222                 mutex_lock(&oxfw->mutex);
 223                 oxfw->capture_substreams++;
 224                 mutex_unlock(&oxfw->mutex);
 225         }
 226
 227         return 0;
 228 }
 229 static int pcm_playback_hw_params(struct snd_pcm_substream *substream,
 230                                   struct snd_pcm_hw_params *hw_params)
 231 {
 232         struct snd_oxfw *oxfw = substream->private_data;
 233         int err;
 234
 235         err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
 236                                                params_buffer_bytes(hw_params));
 237         if (err < 0)
 238                 return err;
 239
 240         if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
 241                 mutex_lock(&oxfw->mutex);
 242                 oxfw->playback_substreams++;
 243                 mutex_unlock(&oxfw->mutex);
 244         }
 245
 246         return 0;
 247 }
 248
 249 static int pcm_capture_hw_free(struct snd_pcm_substream *substream)
 250 {
 251         struct snd_oxfw *oxfw = substream->private_data;
 252
 253         mutex_lock(&oxfw->mutex);
 254
 255         if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
 256                 oxfw->capture_substreams--;
 257
 258         snd_oxfw_stream_stop_simplex(oxfw, &oxfw->tx_stream);
 259
 260         mutex_unlock(&oxfw->mutex);
 261
 262         return snd_pcm_lib_free_vmalloc_buffer(substream);
 263 }
 264 static int pcm_playback_hw_free(struct snd_pcm_substream *substream)
 265 {
 266         struct snd_oxfw *oxfw = substream->private_data;
 267
 268         mutex_lock(&oxfw->mutex);
 269
 270         if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
 271                 oxfw->playback_substreams--;
 272
 273         snd_oxfw_stream_stop_simplex(oxfw, &oxfw->rx_stream);
 274
 275         mutex_unlock(&oxfw->mutex);
 276
 277         return snd_pcm_lib_free_vmalloc_buffer(substream);
 278 }
 279
 280 static int pcm_capture_prepare(struct snd_pcm_substream *substream)
 281 {
 282         struct snd_oxfw *oxfw = substream->private_data;
 283         struct snd_pcm_runtime *runtime = substream->runtime;
 284         int err;
 285
 286         mutex_lock(&oxfw->mutex);
 287         err = snd_oxfw_stream_start_simplex(oxfw, &oxfw->tx_stream,
 288                                             runtime->rate, runtime->channels);
 289         mutex_unlock(&oxfw->mutex);
 290         if (err < 0)
 291                 goto end;
 292
 293         amdtp_stream_pcm_prepare(&oxfw->tx_stream);
 294 end:
 295         return err;
 296 }
 297 static int pcm_playback_prepare(struct snd_pcm_substream *substream)
 298 {
 299         struct snd_oxfw *oxfw = substream->private_data;
 300         struct snd_pcm_runtime *runtime = substream->runtime;
 301         int err;
 302
 303         mutex_lock(&oxfw->mutex);
 304         err = snd_oxfw_stream_start_simplex(oxfw, &oxfw->rx_stream,
 305                                             runtime->rate, runtime->channels);
 306         mutex_unlock(&oxfw->mutex);
 307         if (err < 0)
 308                 goto end;
 309
 310         amdtp_stream_pcm_prepare(&oxfw->rx_stream);
 311 end:
 312         return err;
 313 }
 314
 315 static int pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd)
 316 {
 317         struct snd_oxfw *oxfw = substream->private_data;
 318         struct snd_pcm_substream *pcm;
 319
 320         switch (cmd) {
 321         case SNDRV_PCM_TRIGGER_START:
 322                 pcm = substream;
 323                 break;
 324         case SNDRV_PCM_TRIGGER_STOP:
 325                 pcm = NULL;
 326                 break;
 327         default:
 328                 return -EINVAL;
 329         }
 330         amdtp_stream_pcm_trigger(&oxfw->tx_stream, pcm);
 331         return 0;
 332 }
 333 static int pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd)
 334 {
 335         struct snd_oxfw *oxfw = substream->private_data;
 336         struct snd_pcm_substream *pcm;
 337
 338         switch (cmd) {
 339         case SNDRV_PCM_TRIGGER_START:
 340                 pcm = substream;
 341                 break;
 342         case SNDRV_PCM_TRIGGER_STOP:
 343                 pcm = NULL;
 344                 break;
 345         default:
 346                 return -EINVAL;
 347         }
 348         amdtp_stream_pcm_trigger(&oxfw->rx_stream, pcm);
 349         return 0;
 350 }
 351
 352 static snd_pcm_uframes_t pcm_capture_pointer(struct snd_pcm_substream *sbstm)
 353 {
 354         struct snd_oxfw *oxfw = sbstm->private_data;
 355
 356         return amdtp_stream_pcm_pointer(&oxfw->tx_stream);
 357 }
 358 static snd_pcm_uframes_t pcm_playback_pointer(struct snd_pcm_substream *sbstm)
 359 {
 360         struct snd_oxfw *oxfw = sbstm->private_data;
 361
 362         return amdtp_stream_pcm_pointer(&oxfw->rx_stream);
 363 }
 364
 365 static int pcm_capture_ack(struct snd_pcm_substream *substream)
 366 {
 367         struct snd_oxfw *oxfw = substream->private_data;
 368
 369         return amdtp_stream_pcm_ack(&oxfw->tx_stream);
 370 }
 371
 372 static int pcm_playback_ack(struct snd_pcm_substream *substream)
 373 {
 374         struct snd_oxfw *oxfw = substream->private_data;
 375
 376         return amdtp_stream_pcm_ack(&oxfw->rx_stream);
 377 }
 378
 379 int snd_oxfw_create_pcm(struct snd_oxfw *oxfw)
 380 {
 381         static const struct snd_pcm_ops capture_ops = {
 382                 .open      = pcm_open,
 383                 .close     = pcm_close,
 384                 .ioctl     = snd_pcm_lib_ioctl,
 385                 .hw_params = pcm_capture_hw_params,
 386                 .hw_free   = pcm_capture_hw_free,
 387                 .prepare   = pcm_capture_prepare,
 388                 .trigger   = pcm_capture_trigger,
 389                 .pointer   = pcm_capture_pointer,
 390                 .ack       = pcm_capture_ack,
 391                 .page      = snd_pcm_lib_get_vmalloc_page,
 392         };
 393         static const struct snd_pcm_ops playback_ops = {
 394                 .open      = pcm_open,
 395                 .close     = pcm_close,
 396                 .ioctl     = snd_pcm_lib_ioctl,
 397                 .hw_params = pcm_playback_hw_params,
 398                 .hw_free   = pcm_playback_hw_free,
 399                 .prepare   = pcm_playback_prepare,
 400                 .trigger   = pcm_playback_trigger,
 401                 .pointer   = pcm_playback_pointer,
 402                 .ack       = pcm_playback_ack,
 403                 .page      = snd_pcm_lib_get_vmalloc_page,
 404         };
 405         struct snd_pcm *pcm;
 406         unsigned int cap = 0;
 407         int err;
 408
 409         if (oxfw->has_output)
 410                 cap = 1;
 411
 412         err = snd_pcm_new(oxfw->card, oxfw->card->driver, 0, 1, cap, &pcm);
 413         if (err < 0)
 414                 return err;
 415
 416         pcm->private_data = oxfw;
 417         strcpy(pcm->name, oxfw->card->shortname);
 418         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &playback_ops);
 419         if (cap > 0)
 420                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &capture_ops);
 421
 422         return 0;
 423 }