sound/firewire/fireworks/fireworks_pcm.c

   1 /*
   2  * fireworks_pcm.c - a part of driver for Fireworks based devices
   3  *
   4  * Copyright (c) 2009-2010 Clemens Ladisch
   5  * Copyright (c) 2013-2014 Takashi Sakamoto
   6  *
   7  * Licensed under the terms of the GNU General Public License, version 2.
   8  */
   9 #include "./fireworks.h"
  10
  11 /*
  12  * NOTE:
  13  * Fireworks changes its AMDTP channels for PCM data according to its sampling
  14  * rate. There are three modes. Here _XX is either _rx or _tx.
  15  *  0:  32.0- 48.0 kHz then snd_efw_hwinfo.amdtp_XX_pcm_channels applied
  16  *  1:  88.2- 96.0 kHz then snd_efw_hwinfo.amdtp_XX_pcm_channels_2x applied
  17  *  2: 176.4-192.0 kHz then snd_efw_hwinfo.amdtp_XX_pcm_channels_4x applied
  18  *
  19  * The number of PCM channels for analog input and output are always fixed but
  20  * the number of PCM channels for digital input and output are differed.
  21  *
  22  * Additionally, according to "AudioFire Owner's Manual Version 2.2", in some
  23  * model, the number of PCM channels for digital input has more restriction
  24  * depending on which digital interface is selected.
  25  *  - S/PDIF coaxial and optical        : use input 1-2
  26  *  - ADAT optical at 32.0-48.0 kHz     : use input 1-8
  27  *  - ADAT optical at 88.2-96.0 kHz     : use input 1-4 (S/MUX format)
  28  *
  29  * The data in AMDTP channels for blank PCM channels are zero.
  30  */
  31 static const unsigned int freq_table[] = {
  32         /* multiplier mode 0 */
  33         [0] = 32000,
  34         [1] = 44100,
  35         [2] = 48000,
  36         /* multiplier mode 1 */
  37         [3] = 88200,
  38         [4] = 96000,
  39         /* multiplier mode 2 */
  40         [5] = 176400,
  41         [6] = 192000,
  42 };
  43
  44 static inline unsigned int
  45 get_multiplier_mode_with_index(unsigned int index)
  46 {
  47         return ((int)index - 1) / 2;
  48 }
  49
  50 int snd_efw_get_multiplier_mode(unsigned int sampling_rate, unsigned int *mode)
  51 {
  52         unsigned int i;
  53
  54         for (i = 0; i < ARRAY_SIZE(freq_table); i++) {
  55                 if (freq_table[i] == sampling_rate) {
  56                         *mode = get_multiplier_mode_with_index(i);
  57                         return 0;
  58                 }
  59         }
  60
  61         return -EINVAL;
  62 }
  63
  64 static int
  65 hw_rule_rate(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule)
  66 {
  67         unsigned int *pcm_channels = rule->private;
  68         struct snd_interval *r =
  69                 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
  70         const struct snd_interval *c =
  71                 hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_CHANNELS);
  72         struct snd_interval t = {
  73                 .min = UINT_MAX, .max = 0, .integer = 1
  74         };
  75         unsigned int i, mode;
  76
  77         for (i = 0; i < ARRAY_SIZE(freq_table); i++) {
  78                 mode = get_multiplier_mode_with_index(i);
  79                 if (!snd_interval_test(c, pcm_channels[mode]))
  80                         continue;
  81
  82                 t.min = min(t.min, freq_table[i]);
  83                 t.max = max(t.max, freq_table[i]);
  84         }
  85
  86         return snd_interval_refine(r, &t);
  87 }
  88
  89 static int
  90 hw_rule_channels(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule)
  91 {
  92         unsigned int *pcm_channels = rule->private;
  93         struct snd_interval *c =
  94                 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
  95         const struct snd_interval *r =
  96                 hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_RATE);
  97         struct snd_interval t = {
  98                 .min = UINT_MAX, .max = 0, .integer = 1
  99         };
 100         unsigned int i, mode;
 101
 102         for (i = 0; i < ARRAY_SIZE(freq_table); i++) {
 103                 mode = get_multiplier_mode_with_index(i);
 104                 if (!snd_interval_test(r, freq_table[i]))
 105                         continue;
 106
 107                 t.min = min(t.min, pcm_channels[mode]);
 108                 t.max = max(t.max, pcm_channels[mode]);
 109         }
 110
 111         return snd_interval_refine(c, &t);
 112 }
 113
 114 static void
 115 limit_channels(struct snd_pcm_hardware *hw, unsigned int *pcm_channels)
 116 {
 117         unsigned int i, mode;
 118
 119         hw->channels_min = UINT_MAX;
 120         hw->channels_max = 0;
 121
 122         for (i = 0; i < ARRAY_SIZE(freq_table); i++) {
 123                 mode = get_multiplier_mode_with_index(i);
 124                 if (pcm_channels[mode] == 0)
 125                         continue;
 126
 127                 hw->channels_min = min(hw->channels_min, pcm_channels[mode]);
 128                 hw->channels_max = max(hw->channels_max, pcm_channels[mode]);
 129         }
 130 }
 131
 132 static void
 133 limit_period_and_buffer(struct snd_pcm_hardware *hw)
 134 {
 135         hw->periods_min = 2;            /* SNDRV_PCM_INFO_BATCH */
 136         hw->periods_max = UINT_MAX;
 137
 138         hw->period_bytes_min = 4 * hw->channels_max;    /* bytes for a frame */
 139
 140         /* Just to prevent from allocating much pages. */
 141         hw->period_bytes_max = hw->period_bytes_min * 2048;
 142         hw->buffer_bytes_max = hw->period_bytes_max * hw->periods_min;
 143 }
 144
 145 static int
 146 pcm_init_hw_params(struct snd_efw *efw,
 147                    struct snd_pcm_substream *substream)
 148 {
 149         struct snd_pcm_runtime *runtime = substream->runtime;
 150         struct amdtp_stream *s;
 151         unsigned int *pcm_channels;
 152         int err;
 153
 154         runtime->hw.info = SNDRV_PCM_INFO_BATCH |
 155                            SNDRV_PCM_INFO_BLOCK_TRANSFER |
 156                            SNDRV_PCM_INFO_INTERLEAVED |
 157                            SNDRV_PCM_INFO_JOINT_DUPLEX |
 158                            SNDRV_PCM_INFO_MMAP |
 159                            SNDRV_PCM_INFO_MMAP_VALID;
 160
 161         if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
 162                 runtime->hw.formats = AM824_IN_PCM_FORMAT_BITS;
 163                 s = &efw->tx_stream;
 164                 pcm_channels = efw->pcm_capture_channels;
 165         } else {
 166                 runtime->hw.formats = AM824_OUT_PCM_FORMAT_BITS;
 167                 s = &efw->rx_stream;
 168                 pcm_channels = efw->pcm_playback_channels;
 169         }
 170
 171         /* limit rates */
 172         runtime->hw.rates = efw->supported_sampling_rate,
 173         snd_pcm_limit_hw_rates(runtime);
 174
 175         limit_channels(&runtime->hw, pcm_channels);
 176         limit_period_and_buffer(&runtime->hw);
 177
 178         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
 179                                   hw_rule_channels, pcm_channels,
 180                                   SNDRV_PCM_HW_PARAM_RATE, -1);
 181         if (err < 0)
 182                 goto end;
 183
 184         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
 185                                   hw_rule_rate, pcm_channels,
 186                                   SNDRV_PCM_HW_PARAM_CHANNELS, -1);
 187         if (err < 0)
 188                 goto end;
 189
 190         err = amdtp_am824_add_pcm_hw_constraints(s, runtime);
 191 end:
 192         return err;
 193 }
 194
 195 static int pcm_open(struct snd_pcm_substream *substream)
 196 {
 197         struct snd_efw *efw = substream->private_data;
 198         unsigned int sampling_rate;
 199         enum snd_efw_clock_source clock_source;
 200         int err;
 201
 202         err = snd_efw_stream_lock_try(efw);
 203         if (err < 0)
 204                 goto end;
 205
 206         err = pcm_init_hw_params(efw, substream);
 207         if (err < 0)
 208                 goto err_locked;
 209
 210         err = snd_efw_command_get_clock_source(efw, &clock_source);
 211         if (err < 0)
 212                 goto err_locked;
 213
 214         /*
 215          * When source of clock is not internal or any PCM streams are running,
 216          * available sampling rate is limited at current sampling rate.
 217          */
 218         if ((clock_source != SND_EFW_CLOCK_SOURCE_INTERNAL) ||
 219             amdtp_stream_pcm_running(&efw->tx_stream) ||
 220             amdtp_stream_pcm_running(&efw->rx_stream)) {
 221                 err = snd_efw_command_get_sampling_rate(efw, &sampling_rate);
 222                 if (err < 0)
 223                         goto err_locked;
 224                 substream->runtime->hw.rate_min = sampling_rate;
 225                 substream->runtime->hw.rate_max = sampling_rate;
 226         }
 227
 228         snd_pcm_set_sync(substream);
 229 end:
 230         return err;
 231 err_locked:
 232         snd_efw_stream_lock_release(efw);
 233         return err;
 234 }
 235
 236 static int pcm_close(struct snd_pcm_substream *substream)
 237 {
 238         struct snd_efw *efw = substream->private_data;
 239         snd_efw_stream_lock_release(efw);
 240         return 0;
 241 }
 242
 243 static int pcm_capture_hw_params(struct snd_pcm_substream *substream,
 244                                  struct snd_pcm_hw_params *hw_params)
 245 {
 246         struct snd_efw *efw = substream->private_data;
 247         int err;
 248
 249         err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
 250                                                params_buffer_bytes(hw_params));
 251         if (err < 0)
 252                 return err;
 253
 254         if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
 255                 mutex_lock(&efw->mutex);
 256                 efw->capture_substreams++;
 257                 mutex_unlock(&efw->mutex);
 258         }
 259
 260         amdtp_am824_set_pcm_format(&efw->tx_stream, params_format(hw_params));
 261
 262         return 0;
 263 }
 264 static int pcm_playback_hw_params(struct snd_pcm_substream *substream,
 265                                   struct snd_pcm_hw_params *hw_params)
 266 {
 267         struct snd_efw *efw = substream->private_data;
 268         int err;
 269
 270         err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
 271                                                params_buffer_bytes(hw_params));
 272         if (err < 0)
 273                 return err;
 274
 275         if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
 276                 mutex_lock(&efw->mutex);
 277                 efw->playback_substreams++;
 278                 mutex_unlock(&efw->mutex);
 279         }
 280
 281         amdtp_am824_set_pcm_format(&efw->rx_stream, params_format(hw_params));
 282
 283         return 0;
 284 }
 285
 286 static int pcm_capture_hw_free(struct snd_pcm_substream *substream)
 287 {
 288         struct snd_efw *efw = substream->private_data;
 289
 290         if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN) {
 291                 mutex_lock(&efw->mutex);
 292                 efw->capture_substreams--;
 293                 mutex_unlock(&efw->mutex);
 294         }
 295
 296         snd_efw_stream_stop_duplex(efw);
 297
 298         return snd_pcm_lib_free_vmalloc_buffer(substream);
 299 }
 300 static int pcm_playback_hw_free(struct snd_pcm_substream *substream)
 301 {
 302         struct snd_efw *efw = substream->private_data;
 303
 304         if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN) {
 305                 mutex_lock(&efw->mutex);
 306                 efw->playback_substreams--;
 307                 mutex_unlock(&efw->mutex);
 308         }
 309
 310         snd_efw_stream_stop_duplex(efw);
 311
 312         return snd_pcm_lib_free_vmalloc_buffer(substream);
 313 }
 314
 315 static int pcm_capture_prepare(struct snd_pcm_substream *substream)
 316 {
 317         struct snd_efw *efw = substream->private_data;
 318         struct snd_pcm_runtime *runtime = substream->runtime;
 319         int err;
 320
 321         err = snd_efw_stream_start_duplex(efw, runtime->rate);
 322         if (err >= 0)
 323                 amdtp_stream_pcm_prepare(&efw->tx_stream);
 324
 325         return err;
 326 }
 327 static int pcm_playback_prepare(struct snd_pcm_substream *substream)
 328 {
 329         struct snd_efw *efw = substream->private_data;
 330         struct snd_pcm_runtime *runtime = substream->runtime;
 331         int err;
 332
 333         err = snd_efw_stream_start_duplex(efw, runtime->rate);
 334         if (err >= 0)
 335                 amdtp_stream_pcm_prepare(&efw->rx_stream);
 336
 337         return err;
 338 }
 339
 340 static int pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd)
 341 {
 342         struct snd_efw *efw = substream->private_data;
 343
 344         switch (cmd) {
 345         case SNDRV_PCM_TRIGGER_START:
 346                 amdtp_stream_pcm_trigger(&efw->tx_stream, substream);
 347                 break;
 348         case SNDRV_PCM_TRIGGER_STOP:
 349                 amdtp_stream_pcm_trigger(&efw->tx_stream, NULL);
 350                 break;
 351         default:
 352                 return -EINVAL;
 353         }
 354
 355         return 0;
 356 }
 357 static int pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd)
 358 {
 359         struct snd_efw *efw = substream->private_data;
 360
 361         switch (cmd) {
 362         case SNDRV_PCM_TRIGGER_START:
 363                 amdtp_stream_pcm_trigger(&efw->rx_stream, substream);
 364                 break;
 365         case SNDRV_PCM_TRIGGER_STOP:
 366                 amdtp_stream_pcm_trigger(&efw->rx_stream, NULL);
 367                 break;
 368         default:
 369                 return -EINVAL;
 370         }
 371
 372         return 0;
 373 }
 374
 375 static snd_pcm_uframes_t pcm_capture_pointer(struct snd_pcm_substream *sbstrm)
 376 {
 377         struct snd_efw *efw = sbstrm->private_data;
 378         return amdtp_stream_pcm_pointer(&efw->tx_stream);
 379 }
 380 static snd_pcm_uframes_t pcm_playback_pointer(struct snd_pcm_substream *sbstrm)
 381 {
 382         struct snd_efw *efw = sbstrm->private_data;
 383         return amdtp_stream_pcm_pointer(&efw->rx_stream);
 384 }
 385
 386 static const struct snd_pcm_ops pcm_capture_ops = {
 387         .open           = pcm_open,
 388         .close          = pcm_close,
 389         .ioctl          = snd_pcm_lib_ioctl,
 390         .hw_params      = pcm_capture_hw_params,
 391         .hw_free        = pcm_capture_hw_free,
 392         .prepare        = pcm_capture_prepare,
 393         .trigger        = pcm_capture_trigger,
 394         .pointer        = pcm_capture_pointer,
 395         .page           = snd_pcm_lib_get_vmalloc_page,
 396 };
 397
 398 static const struct snd_pcm_ops pcm_playback_ops = {
 399         .open           = pcm_open,
 400         .close          = pcm_close,
 401         .ioctl          = snd_pcm_lib_ioctl,
 402         .hw_params      = pcm_playback_hw_params,
 403         .hw_free        = pcm_playback_hw_free,
 404         .prepare        = pcm_playback_prepare,
 405         .trigger        = pcm_playback_trigger,
 406         .pointer        = pcm_playback_pointer,
 407         .page           = snd_pcm_lib_get_vmalloc_page,
 408         .mmap           = snd_pcm_lib_mmap_vmalloc,
 409 };
 410
 411 int snd_efw_create_pcm_devices(struct snd_efw *efw)
 412 {
 413         struct snd_pcm *pcm;
 414         int err;
 415
 416         err = snd_pcm_new(efw->card, efw->card->driver, 0, 1, 1, &pcm);
 417         if (err < 0)
 418                 goto end;
 419
 420         pcm->private_data = efw;
 421         snprintf(pcm->name, sizeof(pcm->name), "%s PCM", efw->card->shortname);
 422         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &pcm_playback_ops);
 423         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &pcm_capture_ops);
 424 end:
 425         return err;
 426 }
 427