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 static void
 104 destroy_stream(struct snd_efw *efw, struct amdtp_stream *stream)
 105 {
 106         stop_stream(efw, stream);
 107
 108         amdtp_stream_destroy(stream);
 109
 110         if (stream == &efw->tx_stream)
 111                 cmp_connection_destroy(&efw->out_conn);
 112         else
 113                 cmp_connection_destroy(&efw->in_conn);
 114 }
 115
 116 static int
 117 get_sync_mode(struct snd_efw *efw, enum cip_flags *sync_mode)
 118 {
 119         enum snd_efw_clock_source clock_source;
 120         int err;
 121
 122         err = snd_efw_command_get_clock_source(efw, &clock_source);
 123         if (err < 0)
 124                 return err;
 125
 126         if (clock_source == SND_EFW_CLOCK_SOURCE_SYTMATCH)
 127                 return -ENOSYS;
 128
 129         *sync_mode = CIP_SYNC_TO_DEVICE;
 130         return 0;
 131 }
 132
 133 static int
 134 check_connection_used_by_others(struct snd_efw *efw, struct amdtp_stream *s)
 135 {
 136         struct cmp_connection *conn;
 137         bool used;
 138         int err;
 139
 140         if (s == &efw->tx_stream)
 141                 conn = &efw->out_conn;
 142         else
 143                 conn = &efw->in_conn;
 144
 145         err = cmp_connection_check_used(conn, &used);
 146         if ((err >= 0) && used && !amdtp_stream_running(s)) {
 147                 dev_err(&efw->unit->device,
 148                         "Connection established by others: %cPCR[%d]\n",
 149                         (conn->direction == CMP_OUTPUT) ? 'o' : 'i',
 150                         conn->pcr_index);
 151                 err = -EBUSY;
 152         }
 153
 154         return err;
 155 }
 156
 157 int snd_efw_stream_init_duplex(struct snd_efw *efw)
 158 {
 159         int err;
 160
 161         err = init_stream(efw, &efw->tx_stream);
 162         if (err < 0)
 163                 goto end;
 164         /* Fireworks transmits NODATA packets with TAG0. */
 165         efw->tx_stream.flags |= CIP_EMPTY_WITH_TAG0;
 166         /* Fireworks has its own meaning for dbc. */
 167         efw->tx_stream.flags |= CIP_DBC_IS_END_EVENT;
 168         /* Fireworks reset dbc at bus reset. */
 169         efw->tx_stream.flags |= CIP_SKIP_DBC_ZERO_CHECK;
 170         /* AudioFire9 always reports wrong dbs. */
 171         if (efw->is_af9)
 172                 efw->tx_stream.flags |= CIP_WRONG_DBS;
 173         /* Firmware version 5.5 reports fixed interval for dbc. */
 174         if (efw->firmware_version == 0x5050000)
 175                 efw->tx_stream.tx_dbc_interval = 8;
 176
 177         err = init_stream(efw, &efw->rx_stream);
 178         if (err < 0) {
 179                 destroy_stream(efw, &efw->tx_stream);
 180                 goto end;
 181         }
 182         /*
 183          * Fireworks ignores MIDI messages in more than first 8 data
 184          * blocks of an received AMDTP packet.
 185          */
 186         efw->rx_stream.rx_blocks_for_midi = 8;
 187
 188         /* set IEC61883 compliant mode (actually not fully compliant...) */
 189         err = snd_efw_command_set_tx_mode(efw, SND_EFW_TRANSPORT_MODE_IEC61883);
 190         if (err < 0) {
 191                 destroy_stream(efw, &efw->tx_stream);
 192                 destroy_stream(efw, &efw->rx_stream);
 193         }
 194 end:
 195         return err;
 196 }
 197
 198 int snd_efw_stream_start_duplex(struct snd_efw *efw, unsigned int rate)
 199 {
 200         struct amdtp_stream *master, *slave;
 201         atomic_t *slave_substreams;
 202         enum cip_flags sync_mode;
 203         unsigned int curr_rate;
 204         int err = 0;
 205
 206         mutex_lock(&efw->mutex);
 207
 208         /* Need no substreams */
 209         if ((atomic_read(&efw->playback_substreams) == 0) &&
 210             (atomic_read(&efw->capture_substreams)  == 0))
 211                 goto end;
 212
 213         err = get_sync_mode(efw, &sync_mode);
 214         if (err < 0)
 215                 goto end;
 216         if (sync_mode == CIP_SYNC_TO_DEVICE) {
 217                 master = &efw->tx_stream;
 218                 slave  = &efw->rx_stream;
 219                 slave_substreams  = &efw->playback_substreams;
 220         } else {
 221                 master = &efw->rx_stream;
 222                 slave  = &efw->tx_stream;
 223                 slave_substreams = &efw->capture_substreams;
 224         }
 225
 226         /*
 227          * Considering JACK/FFADO streaming:
 228          * TODO: This can be removed hwdep functionality becomes popular.
 229          */
 230         err = check_connection_used_by_others(efw, master);
 231         if (err < 0)
 232                 goto end;
 233
 234         /* packet queueing error */
 235         if (amdtp_streaming_error(slave))
 236                 stop_stream(efw, slave);
 237         if (amdtp_streaming_error(master))
 238                 stop_stream(efw, master);
 239
 240         /* stop streams if rate is different */
 241         err = snd_efw_command_get_sampling_rate(efw, &curr_rate);
 242         if (err < 0)
 243                 goto end;
 244         if (rate == 0)
 245                 rate = curr_rate;
 246         if (rate != curr_rate) {
 247                 stop_stream(efw, slave);
 248                 stop_stream(efw, master);
 249         }
 250
 251         /* master should be always running */
 252         if (!amdtp_stream_running(master)) {
 253                 amdtp_stream_set_sync(sync_mode, master, slave);
 254                 efw->master = master;
 255
 256                 err = snd_efw_command_set_sampling_rate(efw, rate);
 257                 if (err < 0)
 258                         goto end;
 259
 260                 err = start_stream(efw, master, rate);
 261                 if (err < 0) {
 262                         dev_err(&efw->unit->device,
 263                                 "fail to start AMDTP master stream:%d\n", err);
 264                         goto end;
 265                 }
 266         }
 267
 268         /* start slave if needed */
 269         if (atomic_read(slave_substreams) > 0 && !amdtp_stream_running(slave)) {
 270                 err = start_stream(efw, slave, rate);
 271                 if (err < 0) {
 272                         dev_err(&efw->unit->device,
 273                                 "fail to start AMDTP slave stream:%d\n", err);
 274                         stop_stream(efw, master);
 275                 }
 276         }
 277 end:
 278         mutex_unlock(&efw->mutex);
 279         return err;
 280 }
 281
 282 void snd_efw_stream_stop_duplex(struct snd_efw *efw)
 283 {
 284         struct amdtp_stream *master, *slave;
 285         atomic_t *master_substreams, *slave_substreams;
 286
 287         if (efw->master == &efw->rx_stream) {
 288                 slave  = &efw->tx_stream;
 289                 master = &efw->rx_stream;
 290                 slave_substreams  = &efw->capture_substreams;
 291                 master_substreams = &efw->playback_substreams;
 292         } else {
 293                 slave  = &efw->rx_stream;
 294                 master = &efw->tx_stream;
 295                 slave_substreams  = &efw->playback_substreams;
 296                 master_substreams = &efw->capture_substreams;
 297         }
 298
 299         mutex_lock(&efw->mutex);
 300
 301         if (atomic_read(slave_substreams) == 0) {
 302                 stop_stream(efw, slave);
 303
 304                 if (atomic_read(master_substreams) == 0)
 305                         stop_stream(efw, master);
 306         }
 307
 308         mutex_unlock(&efw->mutex);
 309 }
 310
 311 void snd_efw_stream_update_duplex(struct snd_efw *efw)
 312 {
 313         if ((cmp_connection_update(&efw->out_conn) < 0) ||
 314             (cmp_connection_update(&efw->in_conn) < 0)) {
 315                 mutex_lock(&efw->mutex);
 316                 stop_stream(efw, &efw->rx_stream);
 317                 stop_stream(efw, &efw->tx_stream);
 318                 mutex_unlock(&efw->mutex);
 319         } else {
 320                 amdtp_stream_update(&efw->rx_stream);
 321                 amdtp_stream_update(&efw->tx_stream);
 322         }
 323 }
 324
 325 void snd_efw_stream_destroy_duplex(struct snd_efw *efw)
 326 {
 327         mutex_lock(&efw->mutex);
 328
 329         destroy_stream(efw, &efw->rx_stream);
 330         destroy_stream(efw, &efw->tx_stream);
 331
 332         mutex_unlock(&efw->mutex);
 333 }
 334
 335 void snd_efw_stream_lock_changed(struct snd_efw *efw)
 336 {
 337         efw->dev_lock_changed = true;
 338         wake_up(&efw->hwdep_wait);
 339 }
 340
 341 int snd_efw_stream_lock_try(struct snd_efw *efw)
 342 {
 343         int err;
 344
 345         spin_lock_irq(&efw->lock);
 346
 347         /* user land lock this */
 348         if (efw->dev_lock_count < 0) {
 349                 err = -EBUSY;
 350                 goto end;
 351         }
 352
 353         /* this is the first time */
 354         if (efw->dev_lock_count++ == 0)
 355                 snd_efw_stream_lock_changed(efw);
 356         err = 0;
 357 end:
 358         spin_unlock_irq(&efw->lock);
 359         return err;
 360 }
 361
 362 void snd_efw_stream_lock_release(struct snd_efw *efw)
 363 {
 364         spin_lock_irq(&efw->lock);
 365
 366         if (WARN_ON(efw->dev_lock_count <= 0))
 367                 goto end;
 368         if (--efw->dev_lock_count == 0)
 369                 snd_efw_stream_lock_changed(efw);
 370 end:
 371         spin_unlock_irq(&efw->lock);
 372 }