sound/firewire/fireworks/fireworks_stream.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * fireworks_stream.c - a part of driver for Fireworks based devices
   4  *
   5  * Copyright (c) 2013-2014 Takashi Sakamoto
   6  */
   7 #include "./fireworks.h"
   8
   9 #define CALLBACK_TIMEOUT        100
  10
  11 static int init_stream(struct snd_efw *efw, struct amdtp_stream *stream)
  12 {
  13         struct cmp_connection *conn;
  14         enum cmp_direction c_dir;
  15         enum amdtp_stream_direction s_dir;
  16         int err;
  17
  18         if (stream == &efw->tx_stream) {
  19                 conn = &efw->out_conn;
  20                 c_dir = CMP_OUTPUT;
  21                 s_dir = AMDTP_IN_STREAM;
  22         } else {
  23                 conn = &efw->in_conn;
  24                 c_dir = CMP_INPUT;
  25                 s_dir = AMDTP_OUT_STREAM;
  26         }
  27
  28         err = cmp_connection_init(conn, efw->unit, c_dir, 0);
  29         if (err < 0)
  30                 return err;
  31
  32         err = amdtp_am824_init(stream, efw->unit, s_dir, CIP_BLOCKING);
  33         if (err < 0) {
  34                 amdtp_stream_destroy(stream);
  35                 cmp_connection_destroy(conn);
  36                 return err;
  37         }
  38
  39         if (stream == &efw->tx_stream) {
  40                 // Fireworks transmits NODATA packets with TAG0.
  41                 efw->tx_stream.flags |= CIP_EMPTY_WITH_TAG0;
  42                 // Fireworks has its own meaning for dbc.
  43                 efw->tx_stream.flags |= CIP_DBC_IS_END_EVENT;
  44                 // Fireworks reset dbc at bus reset.
  45                 efw->tx_stream.flags |= CIP_SKIP_DBC_ZERO_CHECK;
  46                 // But Recent firmwares starts packets with non-zero dbc.
  47                 // Driver version 5.7.6 installs firmware version 5.7.3.
  48                 if (efw->is_fireworks3 &&
  49                     (efw->firmware_version == 0x5070000 ||
  50                      efw->firmware_version == 0x5070300 ||
  51                      efw->firmware_version == 0x5080000))
  52                         efw->tx_stream.flags |= CIP_UNALIGHED_DBC;
  53                 // AudioFire9 always reports wrong dbs.
  54                 if (efw->is_af9)
  55                         efw->tx_stream.flags |= CIP_WRONG_DBS;
  56                 // Firmware version 5.5 reports fixed interval for dbc.
  57                 if (efw->firmware_version == 0x5050000)
  58                         efw->tx_stream.ctx_data.tx.dbc_interval = 8;
  59         }
  60
  61         return err;
  62 }
  63
  64 static int start_stream(struct snd_efw *efw, struct amdtp_stream *stream,
  65                         unsigned int rate)
  66 {
  67         struct cmp_connection *conn;
  68         int err;
  69
  70         if (stream == &efw->tx_stream)
  71                 conn = &efw->out_conn;
  72         else
  73                 conn = &efw->in_conn;
  74
  75         // Establish connection via CMP.
  76         err = cmp_connection_establish(conn);
  77         if (err < 0)
  78                 return err;
  79
  80         // Start amdtp stream.
  81         err = amdtp_domain_add_stream(&efw->domain, stream,
  82                                       conn->resources.channel, conn->speed);
  83         if (err < 0) {
  84                 cmp_connection_break(conn);
  85                 return err;
  86         }
  87
  88         return 0;
  89 }
  90
  91 // This function should be called before starting the stream or after stopping
  92 // the streams.
  93 static void destroy_stream(struct snd_efw *efw, struct amdtp_stream *stream)
  94 {
  95         amdtp_stream_destroy(stream);
  96
  97         if (stream == &efw->tx_stream)
  98                 cmp_connection_destroy(&efw->out_conn);
  99         else
 100                 cmp_connection_destroy(&efw->in_conn);
 101 }
 102
 103 static int
 104 check_connection_used_by_others(struct snd_efw *efw, struct amdtp_stream *s)
 105 {
 106         struct cmp_connection *conn;
 107         bool used;
 108         int err;
 109
 110         if (s == &efw->tx_stream)
 111                 conn = &efw->out_conn;
 112         else
 113                 conn = &efw->in_conn;
 114
 115         err = cmp_connection_check_used(conn, &used);
 116         if ((err >= 0) && used && !amdtp_stream_running(s)) {
 117                 dev_err(&efw->unit->device,
 118                         "Connection established by others: %cPCR[%d]\n",
 119                         (conn->direction == CMP_OUTPUT) ? 'o' : 'i',
 120                         conn->pcr_index);
 121                 err = -EBUSY;
 122         }
 123
 124         return err;
 125 }
 126
 127 int snd_efw_stream_init_duplex(struct snd_efw *efw)
 128 {
 129         int err;
 130
 131         err = init_stream(efw, &efw->tx_stream);
 132         if (err < 0)
 133                 return err;
 134
 135         err = init_stream(efw, &efw->rx_stream);
 136         if (err < 0) {
 137                 destroy_stream(efw, &efw->tx_stream);
 138                 return err;
 139         }
 140
 141         err = amdtp_domain_init(&efw->domain);
 142         if (err < 0) {
 143                 destroy_stream(efw, &efw->tx_stream);
 144                 destroy_stream(efw, &efw->rx_stream);
 145                 return err;
 146         }
 147
 148         // set IEC61883 compliant mode (actually not fully compliant...).
 149         err = snd_efw_command_set_tx_mode(efw, SND_EFW_TRANSPORT_MODE_IEC61883);
 150         if (err < 0) {
 151                 destroy_stream(efw, &efw->tx_stream);
 152                 destroy_stream(efw, &efw->rx_stream);
 153         }
 154
 155         return err;
 156 }
 157
 158 static int keep_resources(struct snd_efw *efw, struct amdtp_stream *stream,
 159                           unsigned int rate, unsigned int mode)
 160 {
 161         unsigned int pcm_channels;
 162         unsigned int midi_ports;
 163         struct cmp_connection *conn;
 164         int err;
 165
 166         if (stream == &efw->tx_stream) {
 167                 pcm_channels = efw->pcm_capture_channels[mode];
 168                 midi_ports = efw->midi_out_ports;
 169                 conn = &efw->out_conn;
 170         } else {
 171                 pcm_channels = efw->pcm_playback_channels[mode];
 172                 midi_ports = efw->midi_in_ports;
 173                 conn = &efw->in_conn;
 174         }
 175
 176         err = amdtp_am824_set_parameters(stream, rate, pcm_channels,
 177                                          midi_ports, false);
 178         if (err < 0)
 179                 return err;
 180
 181         return cmp_connection_reserve(conn, amdtp_stream_get_max_payload(stream));
 182 }
 183
 184 int snd_efw_stream_reserve_duplex(struct snd_efw *efw, unsigned int rate,
 185                                   unsigned int frames_per_period)
 186 {
 187         unsigned int curr_rate;
 188         int err;
 189
 190         // Considering JACK/FFADO streaming:
 191         // TODO: This can be removed hwdep functionality becomes popular.
 192         err = check_connection_used_by_others(efw, &efw->rx_stream);
 193         if (err < 0)
 194                 return err;
 195
 196         // stop streams if rate is different.
 197         err = snd_efw_command_get_sampling_rate(efw, &curr_rate);
 198         if (err < 0)
 199                 return err;
 200         if (rate == 0)
 201                 rate = curr_rate;
 202         if (rate != curr_rate) {
 203                 amdtp_domain_stop(&efw->domain);
 204
 205                 cmp_connection_break(&efw->out_conn);
 206                 cmp_connection_break(&efw->in_conn);
 207
 208                 cmp_connection_release(&efw->out_conn);
 209                 cmp_connection_release(&efw->in_conn);
 210         }
 211
 212         if (efw->substreams_counter == 0 || rate != curr_rate) {
 213                 unsigned int mode;
 214
 215                 err = snd_efw_command_set_sampling_rate(efw, rate);
 216                 if (err < 0)
 217                         return err;
 218
 219                 err = snd_efw_get_multiplier_mode(rate, &mode);
 220                 if (err < 0)
 221                         return err;
 222
 223                 err = keep_resources(efw, &efw->tx_stream, rate, mode);
 224                 if (err < 0)
 225                         return err;
 226
 227                 err = keep_resources(efw, &efw->rx_stream, rate, mode);
 228                 if (err < 0) {
 229                         cmp_connection_release(&efw->in_conn);
 230                         return err;
 231                 }
 232
 233                 err = amdtp_domain_set_events_per_period(&efw->domain,
 234                                                          frames_per_period, 0);
 235                 if (err < 0) {
 236                         cmp_connection_release(&efw->in_conn);
 237                         cmp_connection_release(&efw->out_conn);
 238                         return err;
 239                 }
 240         }
 241
 242         return 0;
 243 }
 244
 245 int snd_efw_stream_start_duplex(struct snd_efw *efw)
 246 {
 247         unsigned int rate;
 248         int err = 0;
 249
 250         // Need no substreams.
 251         if (efw->substreams_counter == 0)
 252                 return -EIO;
 253
 254         if (amdtp_streaming_error(&efw->rx_stream) ||
 255             amdtp_streaming_error(&efw->tx_stream)) {
 256                 amdtp_domain_stop(&efw->domain);
 257                 cmp_connection_break(&efw->out_conn);
 258                 cmp_connection_break(&efw->in_conn);
 259         }
 260
 261         err = snd_efw_command_get_sampling_rate(efw, &rate);
 262         if (err < 0)
 263                 return err;
 264
 265         if (!amdtp_stream_running(&efw->rx_stream)) {
 266                 err = start_stream(efw, &efw->rx_stream, rate);
 267                 if (err < 0)
 268                         goto error;
 269
 270                 err = start_stream(efw, &efw->tx_stream, rate);
 271                 if (err < 0)
 272                         goto error;
 273
 274                 err = amdtp_domain_start(&efw->domain);
 275                 if (err < 0)
 276                         goto error;
 277
 278                 // Wait first callback.
 279                 if (!amdtp_stream_wait_callback(&efw->rx_stream,
 280                                                 CALLBACK_TIMEOUT) ||
 281                     !amdtp_stream_wait_callback(&efw->tx_stream,
 282                                                 CALLBACK_TIMEOUT)) {
 283                         err = -ETIMEDOUT;
 284                         goto error;
 285                 }
 286         }
 287
 288         return 0;
 289 error:
 290         amdtp_domain_stop(&efw->domain);
 291
 292         cmp_connection_break(&efw->out_conn);
 293         cmp_connection_break(&efw->in_conn);
 294
 295         return err;
 296 }
 297
 298 void snd_efw_stream_stop_duplex(struct snd_efw *efw)
 299 {
 300         if (efw->substreams_counter == 0) {
 301                 amdtp_domain_stop(&efw->domain);
 302
 303                 cmp_connection_break(&efw->out_conn);
 304                 cmp_connection_break(&efw->in_conn);
 305
 306                 cmp_connection_release(&efw->out_conn);
 307                 cmp_connection_release(&efw->in_conn);
 308         }
 309 }
 310
 311 void snd_efw_stream_update_duplex(struct snd_efw *efw)
 312 {
 313         amdtp_domain_stop(&efw->domain);
 314
 315         cmp_connection_break(&efw->out_conn);
 316         cmp_connection_break(&efw->in_conn);
 317
 318         amdtp_stream_pcm_abort(&efw->rx_stream);
 319         amdtp_stream_pcm_abort(&efw->tx_stream);
 320 }
 321
 322 void snd_efw_stream_destroy_duplex(struct snd_efw *efw)
 323 {
 324         amdtp_domain_destroy(&efw->domain);
 325
 326         destroy_stream(efw, &efw->rx_stream);
 327         destroy_stream(efw, &efw->tx_stream);
 328 }
 329
 330 void snd_efw_stream_lock_changed(struct snd_efw *efw)
 331 {
 332         efw->dev_lock_changed = true;
 333         wake_up(&efw->hwdep_wait);
 334 }
 335
 336 int snd_efw_stream_lock_try(struct snd_efw *efw)
 337 {
 338         int err;
 339
 340         spin_lock_irq(&efw->lock);
 341
 342         /* user land lock this */
 343         if (efw->dev_lock_count < 0) {
 344                 err = -EBUSY;
 345                 goto end;
 346         }
 347
 348         /* this is the first time */
 349         if (efw->dev_lock_count++ == 0)
 350                 snd_efw_stream_lock_changed(efw);
 351         err = 0;
 352 end:
 353         spin_unlock_irq(&efw->lock);
 354         return err;
 355 }
 356
 357 void snd_efw_stream_lock_release(struct snd_efw *efw)
 358 {
 359         spin_lock_irq(&efw->lock);
 360
 361         if (WARN_ON(efw->dev_lock_count <= 0))
 362                 goto end;
 363         if (--efw->dev_lock_count == 0)
 364                 snd_efw_stream_lock_changed(efw);
 365 end:
 366         spin_unlock_irq(&efw->lock);
 367 }