sound/hda/ext/hdac_ext_stream.c

   1 /*
   2  *  hdac-ext-stream.c - HD-audio extended stream operations.
   3  *
   4  *  Copyright (C) 2015 Intel Corp
   5  *  Author: Jeeja KP <jeeja.kp@intel.com>
   6  *  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License as published by
  10  *  the Free Software Foundation; version 2 of the License.
  11  *
  12  *  This program is distributed in the hope that it will be useful, but
  13  *  WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  *  General Public License for more details.
  16  *
  17  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  18  */
  19
  20 #include <linux/delay.h>
  21 #include <linux/slab.h>
  22 #include <sound/pcm.h>
  23 #include <sound/hda_register.h>
  24 #include <sound/hdaudio_ext.h>
  25
  26 /**
  27  * snd_hdac_ext_stream_init - initialize each stream (aka device)
  28  * @ebus: HD-audio ext core bus
  29  * @stream: HD-audio ext core stream object to initialize
  30  * @idx: stream index number
  31  * @direction: stream direction (SNDRV_PCM_STREAM_PLAYBACK or SNDRV_PCM_STREAM_CAPTURE)
  32  * @tag: the tag id to assign
  33  *
  34  * initialize the stream, if ppcap is enabled then init those and then
  35  * invoke hdac stream initialization routine
  36  */
  37 void snd_hdac_ext_stream_init(struct hdac_ext_bus *ebus,
  38                                 struct hdac_ext_stream *stream,
  39                                 int idx, int direction, int tag)
  40 {
  41         struct hdac_bus *bus = &ebus->bus;
  42
  43         if (ebus->ppcap) {
  44                 stream->pphc_addr = ebus->ppcap + AZX_PPHC_BASE +
  45                                 AZX_PPHC_INTERVAL * idx;
  46
  47                 stream->pplc_addr = ebus->ppcap + AZX_PPLC_BASE +
  48                                 AZX_PPLC_MULTI * ebus->num_streams +
  49                                 AZX_PPLC_INTERVAL * idx;
  50         }
  51
  52         if (ebus->spbcap) {
  53                 stream->spib_addr = ebus->spbcap + AZX_SPB_BASE +
  54                                         AZX_SPB_INTERVAL * idx +
  55                                         AZX_SPB_SPIB;
  56
  57                 stream->fifo_addr = ebus->spbcap + AZX_SPB_BASE +
  58                                         AZX_SPB_INTERVAL * idx +
  59                                         AZX_SPB_MAXFIFO;
  60         }
  61
  62         if (ebus->drsmcap)
  63                 stream->dpibr_addr = ebus->drsmcap + AZX_DRSM_BASE +
  64                                         AZX_DRSM_INTERVAL * idx;
  65
  66         stream->decoupled = false;
  67         snd_hdac_stream_init(bus, &stream->hstream, idx, direction, tag);
  68 }
  69 EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_init);
  70
  71 /**
  72  * snd_hdac_ext_stream_init_all - create and initialize the stream objects
  73  *   for an extended hda bus
  74  * @ebus: HD-audio ext core bus
  75  * @start_idx: start index for streams
  76  * @num_stream: number of streams to initialize
  77  * @dir: direction of streams
  78  */
  79 int snd_hdac_ext_stream_init_all(struct hdac_ext_bus *ebus, int start_idx,
  80                 int num_stream, int dir)
  81 {
  82         int stream_tag = 0;
  83         int i, tag, idx = start_idx;
  84
  85         for (i = 0; i < num_stream; i++) {
  86                 struct hdac_ext_stream *stream =
  87                                 kzalloc(sizeof(*stream), GFP_KERNEL);
  88                 if (!stream)
  89                         return -ENOMEM;
  90                 tag = ++stream_tag;
  91                 snd_hdac_ext_stream_init(ebus, stream, idx, dir, tag);
  92                 idx++;
  93         }
  94
  95         return 0;
  96
  97 }
  98 EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_init_all);
  99
 100 /**
 101  * snd_hdac_stream_free_all - free hdac extended stream objects
 102  *
 103  * @ebus: HD-audio ext core bus
 104  */
 105 void snd_hdac_stream_free_all(struct hdac_ext_bus *ebus)
 106 {
 107         struct hdac_stream *s;
 108         struct hdac_ext_stream *stream;
 109         struct hdac_bus *bus = ebus_to_hbus(ebus);
 110
 111         while (!list_empty(&bus->stream_list)) {
 112                 s = list_first_entry(&bus->stream_list, struct hdac_stream, list);
 113                 stream = stream_to_hdac_ext_stream(s);
 114                 snd_hdac_ext_stream_decouple(ebus, stream, false);
 115                 list_del(&s->list);
 116                 kfree(stream);
 117         }
 118 }
 119 EXPORT_SYMBOL_GPL(snd_hdac_stream_free_all);
 120
 121 /**
 122  * snd_hdac_ext_stream_decouple - decouple the hdac stream
 123  * @ebus: HD-audio ext core bus
 124  * @stream: HD-audio ext core stream object to initialize
 125  * @decouple: flag to decouple
 126  */
 127 void snd_hdac_ext_stream_decouple(struct hdac_ext_bus *ebus,
 128                                 struct hdac_ext_stream *stream, bool decouple)
 129 {
 130         struct hdac_stream *hstream = &stream->hstream;
 131         struct hdac_bus *bus = &ebus->bus;
 132
 133         spin_lock_irq(&bus->reg_lock);
 134         if (decouple)
 135                 snd_hdac_updatel(ebus->ppcap, AZX_REG_PP_PPCTL, 0,
 136                                 AZX_PPCTL_PROCEN(hstream->index));
 137         else
 138                 snd_hdac_updatel(ebus->ppcap, AZX_REG_PP_PPCTL,
 139                                         AZX_PPCTL_PROCEN(hstream->index), 0);
 140         stream->decoupled = decouple;
 141         spin_unlock_irq(&bus->reg_lock);
 142 }
 143 EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_decouple);
 144
 145 /**
 146  * snd_hdac_ext_linkstream_start - start a stream
 147  * @stream: HD-audio ext core stream to start
 148  */
 149 void snd_hdac_ext_link_stream_start(struct hdac_ext_stream *stream)
 150 {
 151         snd_hdac_updatel(stream->pplc_addr, AZX_REG_PPLCCTL, 0, AZX_PPLCCTL_RUN);
 152 }
 153 EXPORT_SYMBOL_GPL(snd_hdac_ext_link_stream_start);
 154
 155 /**
 156  * snd_hdac_ext_link_stream_clear - stop a stream DMA
 157  * @stream: HD-audio ext core stream to stop
 158  */
 159 void snd_hdac_ext_link_stream_clear(struct hdac_ext_stream *stream)
 160 {
 161         snd_hdac_updatel(stream->pplc_addr, AZX_REG_PPLCCTL, AZX_PPLCCTL_RUN, 0);
 162 }
 163 EXPORT_SYMBOL_GPL(snd_hdac_ext_link_stream_clear);
 164
 165 /**
 166  * snd_hdac_ext_link_stream_reset - reset a stream
 167  * @stream: HD-audio ext core stream to reset
 168  */
 169 void snd_hdac_ext_link_stream_reset(struct hdac_ext_stream *stream)
 170 {
 171         unsigned char val;
 172         int timeout;
 173
 174         snd_hdac_ext_link_stream_clear(stream);
 175
 176         snd_hdac_updatel(stream->pplc_addr, AZX_REG_PPLCCTL, 0, AZX_PPLCCTL_STRST);
 177         udelay(3);
 178         timeout = 50;
 179         do {
 180                 val = readl(stream->pplc_addr + AZX_REG_PPLCCTL) &
 181                                 AZX_PPLCCTL_STRST;
 182                 if (val)
 183                         break;
 184                 udelay(3);
 185         } while (--timeout);
 186         val &= ~AZX_PPLCCTL_STRST;
 187         writel(val, stream->pplc_addr + AZX_REG_PPLCCTL);
 188         udelay(3);
 189
 190         timeout = 50;
 191         /* waiting for hardware to report that the stream is out of reset */
 192         do {
 193                 val = readl(stream->pplc_addr + AZX_REG_PPLCCTL) & AZX_PPLCCTL_STRST;
 194                 if (!val)
 195                         break;
 196                 udelay(3);
 197         } while (--timeout);
 198
 199 }
 200 EXPORT_SYMBOL_GPL(snd_hdac_ext_link_stream_reset);
 201
 202 /**
 203  * snd_hdac_ext_link_stream_setup -  set up the SD for streaming
 204  * @stream: HD-audio ext core stream to set up
 205  * @fmt: stream format
 206  */
 207 int snd_hdac_ext_link_stream_setup(struct hdac_ext_stream *stream, int fmt)
 208 {
 209         struct hdac_stream *hstream = &stream->hstream;
 210         unsigned int val;
 211
 212         /* make sure the run bit is zero for SD */
 213         snd_hdac_ext_link_stream_clear(stream);
 214         /* program the stream_tag */
 215         val = readl(stream->pplc_addr + AZX_REG_PPLCCTL);
 216         val = (val & ~AZX_PPLCCTL_STRM_MASK) |
 217                 (hstream->stream_tag << AZX_PPLCCTL_STRM_SHIFT);
 218         writel(val, stream->pplc_addr + AZX_REG_PPLCCTL);
 219
 220         /* program the stream format */
 221         writew(fmt, stream->pplc_addr + AZX_REG_PPLCFMT);
 222
 223         return 0;
 224 }
 225 EXPORT_SYMBOL_GPL(snd_hdac_ext_link_stream_setup);
 226
 227 /**
 228  * snd_hdac_ext_link_set_stream_id - maps stream id to link output
 229  * @link: HD-audio ext link to set up
 230  * @stream: stream id
 231  */
 232 void snd_hdac_ext_link_set_stream_id(struct hdac_ext_link *link,
 233                                  int stream)
 234 {
 235         snd_hdac_updatew(link->ml_addr, AZX_REG_ML_LOSIDV, (1 << stream), 1 << stream);
 236 }
 237 EXPORT_SYMBOL_GPL(snd_hdac_ext_link_set_stream_id);
 238
 239 /**
 240  * snd_hdac_ext_link_clear_stream_id - maps stream id to link output
 241  * @link: HD-audio ext link to set up
 242  * @stream: stream id
 243  */
 244 void snd_hdac_ext_link_clear_stream_id(struct hdac_ext_link *link,
 245                                  int stream)
 246 {
 247         snd_hdac_updatew(link->ml_addr, AZX_REG_ML_LOSIDV, 0, (1 << stream));
 248 }
 249 EXPORT_SYMBOL_GPL(snd_hdac_ext_link_clear_stream_id);
 250
 251 static struct hdac_ext_stream *
 252 hdac_ext_link_stream_assign(struct hdac_ext_bus *ebus,
 253                                 struct snd_pcm_substream *substream)
 254 {
 255         struct hdac_ext_stream *res = NULL;
 256         struct hdac_stream *stream = NULL;
 257         struct hdac_bus *hbus = &ebus->bus;
 258
 259         if (!ebus->ppcap) {
 260                 dev_err(hbus->dev, "stream type not supported\n");
 261                 return NULL;
 262         }
 263
 264         list_for_each_entry(stream, &hbus->stream_list, list) {
 265                 struct hdac_ext_stream *hstream = container_of(stream,
 266                                                 struct hdac_ext_stream,
 267                                                 hstream);
 268                 if (stream->direction != substream->stream)
 269                         continue;
 270
 271                 /* check if decoupled stream and not in use is available */
 272                 if (hstream->decoupled && !hstream->link_locked) {
 273                         res = hstream;
 274                         break;
 275                 }
 276
 277                 if (!hstream->link_locked) {
 278                         snd_hdac_ext_stream_decouple(ebus, hstream, true);
 279                         res = hstream;
 280                         break;
 281                 }
 282         }
 283         if (res) {
 284                 spin_lock_irq(&hbus->reg_lock);
 285                 res->link_locked = 1;
 286                 res->link_substream = substream;
 287                 spin_unlock_irq(&hbus->reg_lock);
 288         }
 289         return res;
 290 }
 291
 292 static struct hdac_ext_stream *
 293 hdac_ext_host_stream_assign(struct hdac_ext_bus *ebus,
 294                                 struct snd_pcm_substream *substream)
 295 {
 296         struct hdac_ext_stream *res = NULL;
 297         struct hdac_stream *stream = NULL;
 298         struct hdac_bus *hbus = &ebus->bus;
 299
 300         if (!ebus->ppcap) {
 301                 dev_err(hbus->dev, "stream type not supported\n");
 302                 return NULL;
 303         }
 304
 305         list_for_each_entry(stream, &hbus->stream_list, list) {
 306                 struct hdac_ext_stream *hstream = container_of(stream,
 307                                                 struct hdac_ext_stream,
 308                                                 hstream);
 309                 if (stream->direction != substream->stream)
 310                         continue;
 311
 312                 if (!stream->opened) {
 313                         if (!hstream->decoupled)
 314                                 snd_hdac_ext_stream_decouple(ebus, hstream, true);
 315                         res = hstream;
 316                         break;
 317                 }
 318         }
 319         if (res) {
 320                 spin_lock_irq(&hbus->reg_lock);
 321                 res->hstream.opened = 1;
 322                 res->hstream.running = 0;
 323                 res->hstream.substream = substream;
 324                 spin_unlock_irq(&hbus->reg_lock);
 325         }
 326
 327         return res;
 328 }
 329
 330 /**
 331  * snd_hdac_ext_stream_assign - assign a stream for the PCM
 332  * @ebus: HD-audio ext core bus
 333  * @substream: PCM substream to assign
 334  * @type: type of stream (coupled, host or link stream)
 335  *
 336  * This assigns the stream based on the type (coupled/host/link), for the
 337  * given PCM substream, assigns it and returns the stream object
 338  *
 339  * coupled: Looks for an unused stream
 340  * host: Looks for an unused decoupled host stream
 341  * link: Looks for an unused decoupled link stream
 342  *
 343  * If no stream is free, returns NULL. The function tries to keep using
 344  * the same stream object when it's used beforehand.  when a stream is
 345  * decoupled, it becomes a host stream and link stream.
 346  */
 347 struct hdac_ext_stream *snd_hdac_ext_stream_assign(struct hdac_ext_bus *ebus,
 348                                            struct snd_pcm_substream *substream,
 349                                            int type)
 350 {
 351         struct hdac_ext_stream *hstream = NULL;
 352         struct hdac_stream *stream = NULL;
 353         struct hdac_bus *hbus = &ebus->bus;
 354
 355         switch (type) {
 356         case HDAC_EXT_STREAM_TYPE_COUPLED:
 357                 stream = snd_hdac_stream_assign(hbus, substream);
 358                 if (stream)
 359                         hstream = container_of(stream,
 360                                         struct hdac_ext_stream, hstream);
 361                 return hstream;
 362
 363         case HDAC_EXT_STREAM_TYPE_HOST:
 364                 return hdac_ext_host_stream_assign(ebus, substream);
 365
 366         case HDAC_EXT_STREAM_TYPE_LINK:
 367                 return hdac_ext_link_stream_assign(ebus, substream);
 368
 369         default:
 370                 return NULL;
 371         }
 372 }
 373 EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_assign);
 374
 375 /**
 376  * snd_hdac_ext_stream_release - release the assigned stream
 377  * @stream: HD-audio ext core stream to release
 378  * @type: type of stream (coupled, host or link stream)
 379  *
 380  * Release the stream that has been assigned by snd_hdac_ext_stream_assign().
 381  */
 382 void snd_hdac_ext_stream_release(struct hdac_ext_stream *stream, int type)
 383 {
 384         struct hdac_bus *bus = stream->hstream.bus;
 385         struct hdac_ext_bus *ebus = hbus_to_ebus(bus);
 386
 387         switch (type) {
 388         case HDAC_EXT_STREAM_TYPE_COUPLED:
 389                 snd_hdac_stream_release(&stream->hstream);
 390                 break;
 391
 392         case HDAC_EXT_STREAM_TYPE_HOST:
 393                 if (stream->decoupled && !stream->link_locked)
 394                         snd_hdac_ext_stream_decouple(ebus, stream, false);
 395                 snd_hdac_stream_release(&stream->hstream);
 396                 break;
 397
 398         case HDAC_EXT_STREAM_TYPE_LINK:
 399                 if (stream->decoupled && !stream->hstream.opened)
 400                         snd_hdac_ext_stream_decouple(ebus, stream, false);
 401                 spin_lock_irq(&bus->reg_lock);
 402                 stream->link_locked = 0;
 403                 stream->link_substream = NULL;
 404                 spin_unlock_irq(&bus->reg_lock);
 405                 break;
 406
 407         default:
 408                 dev_dbg(bus->dev, "Invalid type %d\n", type);
 409         }
 410
 411 }
 412 EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_release);
 413
 414 /**
 415  * snd_hdac_ext_stream_spbcap_enable - enable SPIB for a stream
 416  * @ebus: HD-audio ext core bus
 417  * @enable: flag to enable/disable SPIB
 418  * @index: stream index for which SPIB need to be enabled
 419  */
 420 void snd_hdac_ext_stream_spbcap_enable(struct hdac_ext_bus *ebus,
 421                                  bool enable, int index)
 422 {
 423         u32 mask = 0;
 424         u32 register_mask = 0;
 425         struct hdac_bus *bus = &ebus->bus;
 426
 427         if (!ebus->spbcap) {
 428                 dev_err(bus->dev, "Address of SPB capability is NULL");
 429                 return;
 430         }
 431
 432         mask |= (1 << index);
 433
 434         register_mask = readl(ebus->spbcap + AZX_REG_SPB_SPBFCCTL);
 435
 436         mask |= register_mask;
 437
 438         if (enable)
 439                 snd_hdac_updatel(ebus->spbcap, AZX_REG_SPB_SPBFCCTL, 0, mask);
 440         else
 441                 snd_hdac_updatel(ebus->spbcap, AZX_REG_SPB_SPBFCCTL, mask, 0);
 442 }
 443 EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_spbcap_enable);
 444
 445 /**
 446  * snd_hdac_ext_stream_set_spib - sets the spib value of a stream
 447  * @ebus: HD-audio ext core bus
 448  * @stream: hdac_ext_stream
 449  * @value: spib value to set
 450  */
 451 int snd_hdac_ext_stream_set_spib(struct hdac_ext_bus *ebus,
 452                                  struct hdac_ext_stream *stream, u32 value)
 453 {
 454         struct hdac_bus *bus = &ebus->bus;
 455
 456         if (!ebus->spbcap) {
 457                 dev_err(bus->dev, "Address of SPB capability is NULL");
 458                 return -EINVAL;
 459         }
 460
 461         writel(value, stream->spib_addr);
 462
 463         return 0;
 464 }
 465 EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_set_spib);
 466
 467 /**
 468  * snd_hdac_ext_stream_get_spbmaxfifo - gets the spib value of a stream
 469  * @ebus: HD-audio ext core bus
 470  * @stream: hdac_ext_stream
 471  *
 472  * Return maxfifo for the stream
 473  */
 474 int snd_hdac_ext_stream_get_spbmaxfifo(struct hdac_ext_bus *ebus,
 475                                  struct hdac_ext_stream *stream)
 476 {
 477         struct hdac_bus *bus = &ebus->bus;
 478
 479         if (!ebus->spbcap) {
 480                 dev_err(bus->dev, "Address of SPB capability is NULL");
 481                 return -EINVAL;
 482         }
 483
 484         return readl(stream->fifo_addr);
 485 }
 486 EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_get_spbmaxfifo);
 487
 488
 489 /**
 490  * snd_hdac_ext_stop_streams - stop all stream if running
 491  * @ebus: HD-audio ext core bus
 492  */
 493 void snd_hdac_ext_stop_streams(struct hdac_ext_bus *ebus)
 494 {
 495         struct hdac_bus *bus = ebus_to_hbus(ebus);
 496         struct hdac_stream *stream;
 497
 498         if (bus->chip_init) {
 499                 list_for_each_entry(stream, &bus->stream_list, list)
 500                         snd_hdac_stream_stop(stream);
 501                 snd_hdac_bus_stop_chip(bus);
 502         }
 503 }
 504 EXPORT_SYMBOL_GPL(snd_hdac_ext_stop_streams);
 505
 506 /**
 507  * snd_hdac_ext_stream_drsm_enable - enable DMA resume for a stream
 508  * @ebus: HD-audio ext core bus
 509  * @enable: flag to enable/disable DRSM
 510  * @index: stream index for which DRSM need to be enabled
 511  */
 512 void snd_hdac_ext_stream_drsm_enable(struct hdac_ext_bus *ebus,
 513                                 bool enable, int index)
 514 {
 515         u32 mask = 0;
 516         u32 register_mask = 0;
 517         struct hdac_bus *bus = &ebus->bus;
 518
 519         if (!ebus->drsmcap) {
 520                 dev_err(bus->dev, "Address of DRSM capability is NULL");
 521                 return;
 522         }
 523
 524         mask |= (1 << index);
 525
 526         register_mask = readl(ebus->drsmcap + AZX_REG_SPB_SPBFCCTL);
 527
 528         mask |= register_mask;
 529
 530         if (enable)
 531                 snd_hdac_updatel(ebus->drsmcap, AZX_REG_DRSM_CTL, 0, mask);
 532         else
 533                 snd_hdac_updatel(ebus->drsmcap, AZX_REG_DRSM_CTL, mask, 0);
 534 }
 535 EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_drsm_enable);
 536
 537 /**
 538  * snd_hdac_ext_stream_set_dpibr - sets the dpibr value of a stream
 539  * @ebus: HD-audio ext core bus
 540  * @stream: hdac_ext_stream
 541  * @value: dpib value to set
 542  */
 543 int snd_hdac_ext_stream_set_dpibr(struct hdac_ext_bus *ebus,
 544                                  struct hdac_ext_stream *stream, u32 value)
 545 {
 546         struct hdac_bus *bus = &ebus->bus;
 547
 548         if (!ebus->drsmcap) {
 549                 dev_err(bus->dev, "Address of DRSM capability is NULL");
 550                 return -EINVAL;
 551         }
 552
 553         writel(value, stream->dpibr_addr);
 554
 555         return 0;
 556 }
 557 EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_set_dpibr);
 558
 559 /**
 560  * snd_hdac_ext_stream_set_lpib - sets the lpib value of a stream
 561  * @ebus: HD-audio ext core bus
 562  * @stream: hdac_ext_stream
 563  * @value: lpib value to set
 564  */
 565 int snd_hdac_ext_stream_set_lpib(struct hdac_ext_stream *stream, u32 value)
 566 {
 567         snd_hdac_stream_writel(&stream->hstream, SD_LPIB, value);
 568
 569         return 0;
 570 }
 571 EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_set_lpib);