sound/firewire/fireworks/fireworks_stream.c

   1 /*
   2  * fireworks_stream.c - a part of driver for Fireworks based devices
   3  *
   4  * Copyright (c) 2013-2014 Takashi Sakamoto
   5  *
   6  * Licensed under the terms of the GNU General Public License, version 2.
   7  */
   8 #include "./fireworks.h"
   9
  10 #define CALLBACK_TIMEOUT        100
  11
  12 static int
  13 init_stream(struct snd_efw *efw, struct amdtp_stream *stream)
  14 {
  15         struct cmp_connection *conn;
  16         enum cmp_direction c_dir;
  17         enum amdtp_stream_direction s_dir;
  18         int err;
  19
  20         if (stream == &efw->tx_stream) {
  21                 conn = &efw->out_conn;
  22                 c_dir = CMP_OUTPUT;
  23                 s_dir = AMDTP_IN_STREAM;
  24         } else {
  25                 conn = &efw->in_conn;
  26                 c_dir = CMP_INPUT;
  27                 s_dir = AMDTP_OUT_STREAM;
  28         }
  29
  30         err = cmp_connection_init(conn, efw->unit, c_dir, 0);
  31         if (err < 0)
  32                 goto end;
  33
  34         err = amdtp_stream_init(stream, efw->unit, s_dir, CIP_BLOCKING);
  35         if (err < 0) {
  36                 amdtp_stream_destroy(stream);
  37                 cmp_connection_destroy(conn);
  38         }
  39 end:
  40         return err;
  41 }
  42
  43 static void
  44 stop_stream(struct snd_efw *efw, struct amdtp_stream *stream)
  45 {
  46         amdtp_stream_pcm_abort(stream);
  47         amdtp_stream_stop(stream);
  48
  49         if (stream == &efw->tx_stream)
  50                 cmp_connection_break(&efw->out_conn);
  51         else
  52                 cmp_connection_break(&efw->in_conn);
  53 }
  54
  55 static int
  56 start_stream(struct snd_efw *efw, struct amdtp_stream *stream,
  57              unsigned int sampling_rate)
  58 {
  59         struct cmp_connection *conn;
  60         unsigned int mode, pcm_channels, midi_ports;
  61         int err;
  62
  63         err = snd_efw_get_multiplier_mode(sampling_rate, &mode);
  64         if (err < 0)
  65                 goto end;
  66         if (stream == &efw->tx_stream) {
  67                 conn = &efw->out_conn;
  68                 pcm_channels = efw->pcm_capture_channels[mode];
  69                 midi_ports = efw->midi_out_ports;
  70         } else {
  71                 conn = &efw->in_conn;
  72                 pcm_channels = efw->pcm_playback_channels[mode];
  73                 midi_ports = efw->midi_in_ports;
  74         }
  75
  76         amdtp_stream_set_parameters(stream, sampling_rate,
  77                                     pcm_channels, midi_ports);
  78
  79         /*  establish connection via CMP */
  80         err = cmp_connection_establish(conn,
  81                                 amdtp_stream_get_max_payload(stream));
  82         if (err < 0)
  83                 goto end;
  84
  85         /* start amdtp stream */
  86         err = amdtp_stream_start(stream,
  87                                  conn->resources.channel,
  88                                  conn->speed);
  89         if (err < 0) {
  90                 stop_stream(efw, stream);
  91                 goto end;
  92         }
  93
  94         /* wait first callback */
  95         if (!amdtp_stream_wait_callback(stream, CALLBACK_TIMEOUT)) {
  96                 stop_stream(efw, stream);
  97                 err = -ETIMEDOUT;
  98         }
  99 end:
 100         return err;
 101 }
 102
 103 /*
 104  * This function should be called before starting the stream or after stopping
 105  * the streams.
 106  */
 107 static void
 108 destroy_stream(struct snd_efw *efw, struct amdtp_stream *stream)
 109 {
 110         struct cmp_connection *conn;
 111
 112         if (stream == &efw->tx_stream)
 113                 conn = &efw->out_conn;
 114         else
 115                 conn = &efw->in_conn;
 116
 117         amdtp_stream_destroy(stream);
 118         cmp_connection_destroy(&efw->out_conn);
 119 }
 120
 121 static int
 122 get_sync_mode(struct snd_efw *efw, enum cip_flags *sync_mode)
 123 {
 124         enum snd_efw_clock_source clock_source;
 125         int err;
 126
 127         err = snd_efw_command_get_clock_source(efw, &clock_source);
 128         if (err < 0)
 129                 return err;
 130
 131         if (clock_source == SND_EFW_CLOCK_SOURCE_SYTMATCH)
 132                 return -ENOSYS;
 133
 134         *sync_mode = CIP_SYNC_TO_DEVICE;
 135         return 0;
 136 }
 137
 138 static int
 139 check_connection_used_by_others(struct snd_efw *efw, struct amdtp_stream *s)
 140 {
 141         struct cmp_connection *conn;
 142         bool used;
 143         int err;
 144
 145         if (s == &efw->tx_stream)
 146                 conn = &efw->out_conn;
 147         else
 148                 conn = &efw->in_conn;
 149
 150         err = cmp_connection_check_used(conn, &used);
 151         if ((err >= 0) && used && !amdtp_stream_running(s)) {
 152                 dev_err(&efw->unit->device,
 153                         "Connection established by others: %cPCR[%d]\n",
 154                         (conn->direction == CMP_OUTPUT) ? 'o' : 'i',
 155                         conn->pcr_index);
 156                 err = -EBUSY;
 157         }
 158
 159         return err;
 160 }
 161
 162 int snd_efw_stream_init_duplex(struct snd_efw *efw)
 163 {
 164         int err;
 165
 166         err = init_stream(efw, &efw->tx_stream);
 167         if (err < 0)
 168                 goto end;
 169         /* Fireworks transmits NODATA packets with TAG0. */
 170         efw->tx_stream.flags |= CIP_EMPTY_WITH_TAG0;
 171         /* Fireworks has its own meaning for dbc. */
 172         efw->tx_stream.flags |= CIP_DBC_IS_END_EVENT;
 173         /* Fireworks reset dbc at bus reset. */
 174         efw->tx_stream.flags |= CIP_SKIP_DBC_ZERO_CHECK;
 175         /*
 176          * But Recent firmwares starts packets with non-zero dbc.
 177          * Driver version 5.7.6 installs firmware version 5.7.3.
 178          */
 179         if (efw->is_fireworks3 &&
 180             (efw->firmware_version == 0x5070000 ||
 181              efw->firmware_version == 0x5070300 ||
 182              efw->firmware_version == 0x5080000))
 183                 efw->tx_stream.tx_first_dbc = 0x02;
 184         /* AudioFire9 always reports wrong dbs. */
 185         if (efw->is_af9)
 186                 efw->tx_stream.flags |= CIP_WRONG_DBS;
 187         /* Firmware version 5.5 reports fixed interval for dbc. */
 188         if (efw->firmware_version == 0x5050000)
 189                 efw->tx_stream.tx_dbc_interval = 8;
 190
 191         err = init_stream(efw, &efw->rx_stream);
 192         if (err < 0) {
 193                 destroy_stream(efw, &efw->tx_stream);
 194                 goto end;
 195         }
 196
 197         /* set IEC61883 compliant mode (actually not fully compliant...) */
 198         err = snd_efw_command_set_tx_mode(efw, SND_EFW_TRANSPORT_MODE_IEC61883);
 199         if (err < 0) {
 200                 destroy_stream(efw, &efw->tx_stream);
 201                 destroy_stream(efw, &efw->rx_stream);
 202         }
 203 end:
 204         return err;
 205 }
 206
 207 int snd_efw_stream_start_duplex(struct snd_efw *efw, unsigned int rate)
 208 {
 209         struct amdtp_stream *master, *slave;
 210         atomic_t *slave_substreams;
 211         enum cip_flags sync_mode;
 212         unsigned int curr_rate;
 213         int err = 0;
 214
 215         mutex_lock(&efw->mutex);
 216
 217         /* Need no substreams */
 218         if ((atomic_read(&efw->playback_substreams) == 0) &&
 219             (atomic_read(&efw->capture_substreams)  == 0))
 220                 goto end;
 221
 222         err = get_sync_mode(efw, &sync_mode);
 223         if (err < 0)
 224                 goto end;
 225         if (sync_mode == CIP_SYNC_TO_DEVICE) {
 226                 master = &efw->tx_stream;
 227                 slave  = &efw->rx_stream;
 228                 slave_substreams  = &efw->playback_substreams;
 229         } else {
 230                 master = &efw->rx_stream;
 231                 slave  = &efw->tx_stream;
 232                 slave_substreams = &efw->capture_substreams;
 233         }
 234
 235         /*
 236          * Considering JACK/FFADO streaming:
 237          * TODO: This can be removed hwdep functionality becomes popular.
 238          */
 239         err = check_connection_used_by_others(efw, master);
 240         if (err < 0)
 241                 goto end;
 242
 243         /* packet queueing error */
 244         if (amdtp_streaming_error(slave))
 245                 stop_stream(efw, slave);
 246         if (amdtp_streaming_error(master))
 247                 stop_stream(efw, master);
 248
 249         /* stop streams if rate is different */
 250         err = snd_efw_command_get_sampling_rate(efw, &curr_rate);
 251         if (err < 0)
 252                 goto end;
 253         if (rate == 0)
 254                 rate = curr_rate;
 255         if (rate != curr_rate) {
 256                 stop_stream(efw, slave);
 257                 stop_stream(efw, master);
 258         }
 259
 260         /* master should be always running */
 261         if (!amdtp_stream_running(master)) {
 262                 amdtp_stream_set_sync(sync_mode, master, slave);
 263                 efw->master = master;
 264
 265                 err = snd_efw_command_set_sampling_rate(efw, rate);
 266                 if (err < 0)
 267                         goto end;
 268
 269                 err = start_stream(efw, master, rate);
 270                 if (err < 0) {
 271                         dev_err(&efw->unit->device,
 272                                 "fail to start AMDTP master stream:%d\n", err);
 273                         goto end;
 274                 }
 275         }
 276
 277         /* start slave if needed */
 278         if (atomic_read(slave_substreams) > 0 && !amdtp_stream_running(slave)) {
 279                 err = start_stream(efw, slave, rate);
 280                 if (err < 0) {
 281                         dev_err(&efw->unit->device,
 282                                 "fail to start AMDTP slave stream:%d\n", err);
 283                         stop_stream(efw, master);
 284                 }
 285         }
 286 end:
 287         mutex_unlock(&efw->mutex);
 288         return err;
 289 }
 290
 291 void snd_efw_stream_stop_duplex(struct snd_efw *efw)
 292 {
 293         struct amdtp_stream *master, *slave;
 294         atomic_t *master_substreams, *slave_substreams;
 295
 296         if (efw->master == &efw->rx_stream) {
 297                 slave  = &efw->tx_stream;
 298                 master = &efw->rx_stream;
 299                 slave_substreams  = &efw->capture_substreams;
 300                 master_substreams = &efw->playback_substreams;
 301         } else {
 302                 slave  = &efw->rx_stream;
 303                 master = &efw->tx_stream;
 304                 slave_substreams  = &efw->playback_substreams;
 305                 master_substreams = &efw->capture_substreams;
 306         }
 307
 308         mutex_lock(&efw->mutex);
 309
 310         if (atomic_read(slave_substreams) == 0) {
 311                 stop_stream(efw, slave);
 312
 313                 if (atomic_read(master_substreams) == 0)
 314                         stop_stream(efw, master);
 315         }
 316
 317         mutex_unlock(&efw->mutex);
 318 }
 319
 320 void snd_efw_stream_update_duplex(struct snd_efw *efw)
 321 {
 322         if ((cmp_connection_update(&efw->out_conn) < 0) ||
 323             (cmp_connection_update(&efw->in_conn) < 0)) {
 324                 mutex_lock(&efw->mutex);
 325                 stop_stream(efw, &efw->rx_stream);
 326                 stop_stream(efw, &efw->tx_stream);
 327                 mutex_unlock(&efw->mutex);
 328         } else {
 329                 amdtp_stream_update(&efw->rx_stream);
 330                 amdtp_stream_update(&efw->tx_stream);
 331         }
 332 }
 333
 334 void snd_efw_stream_destroy_duplex(struct snd_efw *efw)
 335 {
 336         destroy_stream(efw, &efw->rx_stream);
 337         destroy_stream(efw, &efw->tx_stream);
 338 }
 339
 340 void snd_efw_stream_lock_changed(struct snd_efw *efw)
 341 {
 342         efw->dev_lock_changed = true;
 343         wake_up(&efw->hwdep_wait);
 344 }
 345
 346 int snd_efw_stream_lock_try(struct snd_efw *efw)
 347 {
 348         int err;
 349
 350         spin_lock_irq(&efw->lock);
 351
 352         /* user land lock this */
 353         if (efw->dev_lock_count < 0) {
 354                 err = -EBUSY;
 355                 goto end;
 356         }
 357
 358         /* this is the first time */
 359         if (efw->dev_lock_count++ == 0)
 360                 snd_efw_stream_lock_changed(efw);
 361         err = 0;
 362 end:
 363         spin_unlock_irq(&efw->lock);
 364         return err;
 365 }
 366
 367 void snd_efw_stream_lock_release(struct snd_efw *efw)
 368 {
 369         spin_lock_irq(&efw->lock);
 370
 371         if (WARN_ON(efw->dev_lock_count <= 0))
 372                 goto end;
 373         if (--efw->dev_lock_count == 0)
 374                 snd_efw_stream_lock_changed(efw);
 375 end:
 376         spin_unlock_irq(&efw->lock);
 377 }