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 (bus->ppcap) {
  44                 stream->pphc_addr = bus->ppcap + AZX_PPHC_BASE +
  45                                 AZX_PPHC_INTERVAL * idx;
  46
  47                 stream->pplc_addr = bus->ppcap + AZX_PPLC_BASE +
  48                                 AZX_PPLC_MULTI * ebus->num_streams +
  49                                 AZX_PPLC_INTERVAL * idx;
  50         }
  51
  52         if (bus->spbcap) {
  53                 stream->spib_addr = bus->spbcap + AZX_SPB_BASE +
  54                                         AZX_SPB_INTERVAL * idx +
  55                                         AZX_SPB_SPIB;
  56
  57                 stream->fifo_addr = bus->spbcap + AZX_SPB_BASE +
  58                                         AZX_SPB_INTERVAL * idx +
  59                                         AZX_SPB_MAXFIFO;
  60         }
  61
  62         if (bus->drsmcap)
  63                 stream->dpibr_addr = bus->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, *_s;
 108         struct hdac_ext_stream *stream;
 109         struct hdac_bus *bus = ebus_to_hbus(ebus);
 110
 111         list_for_each_entry_safe(s, _s, &bus->stream_list, list) {
 112                 stream = stream_to_hdac_ext_stream(s);
 113                 snd_hdac_ext_stream_decouple(ebus, stream, false);
 114                 list_del(&s->list);
 115                 kfree(stream);
 116         }
 117 }
 118 EXPORT_SYMBOL_GPL(snd_hdac_stream_free_all);
 119
 120 /**
 121  * snd_hdac_ext_stream_decouple - decouple the hdac stream
 122  * @ebus: HD-audio ext core bus
 123  * @stream: HD-audio ext core stream object to initialize
 124  * @decouple: flag to decouple
 125  */
 126 void snd_hdac_ext_stream_decouple(struct hdac_ext_bus *ebus,
 127                                 struct hdac_ext_stream *stream, bool decouple)
 128 {
 129         struct hdac_stream *hstream = &stream->hstream;
 130         struct hdac_bus *bus = &ebus->bus;
 131         u32 val;
 132         int mask = AZX_PPCTL_PROCEN(hstream->index);
 133
 134         spin_lock_irq(&bus->reg_lock);
 135         val = readw(bus->ppcap + AZX_REG_PP_PPCTL) & mask;
 136
 137         if (decouple && !val)
 138                 snd_hdac_updatel(bus->ppcap, AZX_REG_PP_PPCTL, mask, mask);
 139         else if (!decouple && val)
 140                 snd_hdac_updatel(bus->ppcap, AZX_REG_PP_PPCTL, mask, 0);
 141
 142         stream->decoupled = decouple;
 143         spin_unlock_irq(&bus->reg_lock);
 144 }
 145 EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_decouple);
 146
 147 /**
 148  * snd_hdac_ext_linkstream_start - start a stream
 149  * @stream: HD-audio ext core stream to start
 150  */
 151 void snd_hdac_ext_link_stream_start(struct hdac_ext_stream *stream)
 152 {
 153         snd_hdac_updatel(stream->pplc_addr, AZX_REG_PPLCCTL, 0, AZX_PPLCCTL_RUN);
 154 }
 155 EXPORT_SYMBOL_GPL(snd_hdac_ext_link_stream_start);
 156
 157 /**
 158  * snd_hdac_ext_link_stream_clear - stop a stream DMA
 159  * @stream: HD-audio ext core stream to stop
 160  */
 161 void snd_hdac_ext_link_stream_clear(struct hdac_ext_stream *stream)
 162 {
 163         snd_hdac_updatel(stream->pplc_addr, AZX_REG_PPLCCTL, AZX_PPLCCTL_RUN, 0);
 164 }
 165 EXPORT_SYMBOL_GPL(snd_hdac_ext_link_stream_clear);
 166
 167 /**
 168  * snd_hdac_ext_link_stream_reset - reset a stream
 169  * @stream: HD-audio ext core stream to reset
 170  */
 171 void snd_hdac_ext_link_stream_reset(struct hdac_ext_stream *stream)
 172 {
 173         unsigned char val;
 174         int timeout;
 175
 176         snd_hdac_ext_link_stream_clear(stream);
 177
 178         snd_hdac_updatel(stream->pplc_addr, AZX_REG_PPLCCTL, 0, AZX_PPLCCTL_STRST);
 179         udelay(3);
 180         timeout = 50;
 181         do {
 182                 val = readl(stream->pplc_addr + AZX_REG_PPLCCTL) &
 183                                 AZX_PPLCCTL_STRST;
 184                 if (val)
 185                         break;
 186                 udelay(3);
 187         } while (--timeout);
 188         val &= ~AZX_PPLCCTL_STRST;
 189         writel(val, stream->pplc_addr + AZX_REG_PPLCCTL);
 190         udelay(3);
 191
 192         timeout = 50;
 193         /* waiting for hardware to report that the stream is out of reset */
 194         do {
 195                 val = readl(stream->pplc_addr + AZX_REG_PPLCCTL) & AZX_PPLCCTL_STRST;
 196                 if (!val)
 197                         break;
 198                 udelay(3);
 199         } while (--timeout);
 200
 201 }
 202 EXPORT_SYMBOL_GPL(snd_hdac_ext_link_stream_reset);
 203
 204 /**
 205  * snd_hdac_ext_link_stream_setup -  set up the SD for streaming
 206  * @stream: HD-audio ext core stream to set up
 207  * @fmt: stream format
 208  */
 209 int snd_hdac_ext_link_stream_setup(struct hdac_ext_stream *stream, int fmt)
 210 {
 211         struct hdac_stream *hstream = &stream->hstream;
 212         unsigned int val;
 213
 214         /* make sure the run bit is zero for SD */
 215         snd_hdac_ext_link_stream_clear(stream);
 216         /* program the stream_tag */
 217         val = readl(stream->pplc_addr + AZX_REG_PPLCCTL);
 218         val = (val & ~AZX_PPLCCTL_STRM_MASK) |
 219                 (hstream->stream_tag << AZX_PPLCCTL_STRM_SHIFT);
 220         writel(val, stream->pplc_addr + AZX_REG_PPLCCTL);
 221
 222         /* program the stream format */
 223         writew(fmt, stream->pplc_addr + AZX_REG_PPLCFMT);
 224
 225         return 0;
 226 }
 227 EXPORT_SYMBOL_GPL(snd_hdac_ext_link_stream_setup);
 228
 229 /**
 230  * snd_hdac_ext_link_set_stream_id - maps stream id to link output
 231  * @link: HD-audio ext link to set up
 232  * @stream: stream id
 233  */
 234 void snd_hdac_ext_link_set_stream_id(struct hdac_ext_link *link,
 235                                  int stream)
 236 {
 237         snd_hdac_updatew(link->ml_addr, AZX_REG_ML_LOSIDV, (1 << stream), 1 << stream);
 238 }
 239 EXPORT_SYMBOL_GPL(snd_hdac_ext_link_set_stream_id);
 240
 241 /**
 242  * snd_hdac_ext_link_clear_stream_id - maps stream id to link output
 243  * @link: HD-audio ext link to set up
 244  * @stream: stream id
 245  */
 246 void snd_hdac_ext_link_clear_stream_id(struct hdac_ext_link *link,
 247                                  int stream)
 248 {
 249         snd_hdac_updatew(link->ml_addr, AZX_REG_ML_LOSIDV, 0, (1 << stream));
 250 }
 251 EXPORT_SYMBOL_GPL(snd_hdac_ext_link_clear_stream_id);
 252
 253 static struct hdac_ext_stream *
 254 hdac_ext_link_stream_assign(struct hdac_ext_bus *ebus,
 255                                 struct snd_pcm_substream *substream)
 256 {
 257         struct hdac_ext_stream *res = NULL;
 258         struct hdac_stream *stream = NULL;
 259         struct hdac_bus *hbus = &ebus->bus;
 260
 261         if (!hbus->ppcap) {
 262                 dev_err(hbus->dev, "stream type not supported\n");
 263                 return NULL;
 264         }
 265
 266         list_for_each_entry(stream, &hbus->stream_list, list) {
 267                 struct hdac_ext_stream *hstream = container_of(stream,
 268                                                 struct hdac_ext_stream,
 269                                                 hstream);
 270                 if (stream->direction != substream->stream)
 271                         continue;
 272
 273                 /* check if decoupled stream and not in use is available */
 274                 if (hstream->decoupled && !hstream->link_locked) {
 275                         res = hstream;
 276                         break;
 277                 }
 278
 279                 if (!hstream->link_locked) {
 280                         snd_hdac_ext_stream_decouple(ebus, hstream, true);
 281                         res = hstream;
 282                         break;
 283                 }
 284         }
 285         if (res) {
 286                 spin_lock_irq(&hbus->reg_lock);
 287                 res->link_locked = 1;
 288                 res->link_substream = substream;
 289                 spin_unlock_irq(&hbus->reg_lock);
 290         }
 291         return res;
 292 }
 293
 294 static struct hdac_ext_stream *
 295 hdac_ext_host_stream_assign(struct hdac_ext_bus *ebus,
 296                                 struct snd_pcm_substream *substream)
 297 {
 298         struct hdac_ext_stream *res = NULL;
 299         struct hdac_stream *stream = NULL;
 300         struct hdac_bus *hbus = &ebus->bus;
 301
 302         if (!hbus->ppcap) {
 303                 dev_err(hbus->dev, "stream type not supported\n");
 304                 return NULL;
 305         }
 306
 307         list_for_each_entry(stream, &hbus->stream_list, list) {
 308                 struct hdac_ext_stream *hstream = container_of(stream,
 309                                                 struct hdac_ext_stream,
 310                                                 hstream);
 311                 if (stream->direction != substream->stream)
 312                         continue;
 313
 314                 if (!stream->opened) {
 315                         if (!hstream->decoupled)
 316                                 snd_hdac_ext_stream_decouple(ebus, hstream, true);
 317                         res = hstream;
 318                         break;
 319                 }
 320         }
 321         if (res) {
 322                 spin_lock_irq(&hbus->reg_lock);
 323                 res->hstream.opened = 1;
 324                 res->hstream.running = 0;
 325                 res->hstream.substream = substream;
 326                 spin_unlock_irq(&hbus->reg_lock);
 327         }
 328
 329         return res;
 330 }
 331
 332 /**
 333  * snd_hdac_ext_stream_assign - assign a stream for the PCM
 334  * @ebus: HD-audio ext core bus
 335  * @substream: PCM substream to assign
 336  * @type: type of stream (coupled, host or link stream)
 337  *
 338  * This assigns the stream based on the type (coupled/host/link), for the
 339  * given PCM substream, assigns it and returns the stream object
 340  *
 341  * coupled: Looks for an unused stream
 342  * host: Looks for an unused decoupled host stream
 343  * link: Looks for an unused decoupled link stream
 344  *
 345  * If no stream is free, returns NULL. The function tries to keep using
 346  * the same stream object when it's used beforehand.  when a stream is
 347  * decoupled, it becomes a host stream and link stream.
 348  */
 349 struct hdac_ext_stream *snd_hdac_ext_stream_assign(struct hdac_ext_bus *ebus,
 350                                            struct snd_pcm_substream *substream,
 351                                            int type)
 352 {
 353         struct hdac_ext_stream *hstream = NULL;
 354         struct hdac_stream *stream = NULL;
 355         struct hdac_bus *hbus = &ebus->bus;
 356
 357         switch (type) {
 358         case HDAC_EXT_STREAM_TYPE_COUPLED:
 359                 stream = snd_hdac_stream_assign(hbus, substream);
 360                 if (stream)
 361                         hstream = container_of(stream,
 362                                         struct hdac_ext_stream, hstream);
 363                 return hstream;
 364
 365         case HDAC_EXT_STREAM_TYPE_HOST:
 366                 return hdac_ext_host_stream_assign(ebus, substream);
 367
 368         case HDAC_EXT_STREAM_TYPE_LINK:
 369                 return hdac_ext_link_stream_assign(ebus, substream);
 370
 371         default:
 372                 return NULL;
 373         }
 374 }
 375 EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_assign);
 376
 377 /**
 378  * snd_hdac_ext_stream_release - release the assigned stream
 379  * @stream: HD-audio ext core stream to release
 380  * @type: type of stream (coupled, host or link stream)
 381  *
 382  * Release the stream that has been assigned by snd_hdac_ext_stream_assign().
 383  */
 384 void snd_hdac_ext_stream_release(struct hdac_ext_stream *stream, int type)
 385 {
 386         struct hdac_bus *bus = stream->hstream.bus;
 387         struct hdac_ext_bus *ebus = hbus_to_ebus(bus);
 388
 389         switch (type) {
 390         case HDAC_EXT_STREAM_TYPE_COUPLED:
 391                 snd_hdac_stream_release(&stream->hstream);
 392                 break;
 393
 394         case HDAC_EXT_STREAM_TYPE_HOST:
 395                 if (stream->decoupled && !stream->link_locked)
 396                         snd_hdac_ext_stream_decouple(ebus, stream, false);
 397                 snd_hdac_stream_release(&stream->hstream);
 398                 break;
 399
 400         case HDAC_EXT_STREAM_TYPE_LINK:
 401                 if (stream->decoupled && !stream->hstream.opened)
 402                         snd_hdac_ext_stream_decouple(ebus, stream, false);
 403                 spin_lock_irq(&bus->reg_lock);
 404                 stream->link_locked = 0;
 405                 stream->link_substream = NULL;
 406                 spin_unlock_irq(&bus->reg_lock);
 407                 break;
 408
 409         default:
 410                 dev_dbg(bus->dev, "Invalid type %d\n", type);
 411         }
 412
 413 }
 414 EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_release);
 415
 416 /**
 417  * snd_hdac_ext_stream_spbcap_enable - enable SPIB for a stream
 418  * @ebus: HD-audio ext core bus
 419  * @enable: flag to enable/disable SPIB
 420  * @index: stream index for which SPIB need to be enabled
 421  */
 422 void snd_hdac_ext_stream_spbcap_enable(struct hdac_ext_bus *ebus,
 423                                  bool enable, int index)
 424 {
 425         u32 mask = 0;
 426         u32 register_mask = 0;
 427         struct hdac_bus *bus = &ebus->bus;
 428
 429         if (!bus->spbcap) {
 430                 dev_err(bus->dev, "Address of SPB capability is NULL\n");
 431                 return;
 432         }
 433
 434         mask |= (1 << index);
 435
 436         register_mask = readl(bus->spbcap + AZX_REG_SPB_SPBFCCTL);
 437
 438         mask |= register_mask;
 439
 440         if (enable)
 441                 snd_hdac_updatel(bus->spbcap, AZX_REG_SPB_SPBFCCTL, 0, mask);
 442         else
 443                 snd_hdac_updatel(bus->spbcap, AZX_REG_SPB_SPBFCCTL, mask, 0);
 444 }
 445 EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_spbcap_enable);
 446
 447 /**
 448  * snd_hdac_ext_stream_set_spib - sets the spib value of a stream
 449  * @ebus: HD-audio ext core bus
 450  * @stream: hdac_ext_stream
 451  * @value: spib value to set
 452  */
 453 int snd_hdac_ext_stream_set_spib(struct hdac_ext_bus *ebus,
 454                                  struct hdac_ext_stream *stream, u32 value)
 455 {
 456         struct hdac_bus *bus = &ebus->bus;
 457
 458         if (!bus->spbcap) {
 459                 dev_err(bus->dev, "Address of SPB capability is NULL\n");
 460                 return -EINVAL;
 461         }
 462
 463         writel(value, stream->spib_addr);
 464
 465         return 0;
 466 }
 467 EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_set_spib);
 468
 469 /**
 470  * snd_hdac_ext_stream_get_spbmaxfifo - gets the spib value of a stream
 471  * @ebus: HD-audio ext core bus
 472  * @stream: hdac_ext_stream
 473  *
 474  * Return maxfifo for the stream
 475  */
 476 int snd_hdac_ext_stream_get_spbmaxfifo(struct hdac_ext_bus *ebus,
 477                                  struct hdac_ext_stream *stream)
 478 {
 479         struct hdac_bus *bus = &ebus->bus;
 480
 481         if (!bus->spbcap) {
 482                 dev_err(bus->dev, "Address of SPB capability is NULL\n");
 483                 return -EINVAL;
 484         }
 485
 486         return readl(stream->fifo_addr);
 487 }
 488 EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_get_spbmaxfifo);
 489
 490
 491 /**
 492  * snd_hdac_ext_stop_streams - stop all stream if running
 493  * @ebus: HD-audio ext core bus
 494  */
 495 void snd_hdac_ext_stop_streams(struct hdac_ext_bus *ebus)
 496 {
 497         struct hdac_bus *bus = ebus_to_hbus(ebus);
 498         struct hdac_stream *stream;
 499
 500         if (bus->chip_init) {
 501                 list_for_each_entry(stream, &bus->stream_list, list)
 502                         snd_hdac_stream_stop(stream);
 503                 snd_hdac_bus_stop_chip(bus);
 504         }
 505 }
 506 EXPORT_SYMBOL_GPL(snd_hdac_ext_stop_streams);
 507
 508 /**
 509  * snd_hdac_ext_stream_drsm_enable - enable DMA resume for a stream
 510  * @ebus: HD-audio ext core bus
 511  * @enable: flag to enable/disable DRSM
 512  * @index: stream index for which DRSM need to be enabled
 513  */
 514 void snd_hdac_ext_stream_drsm_enable(struct hdac_ext_bus *ebus,
 515                                 bool enable, int index)
 516 {
 517         u32 mask = 0;
 518         u32 register_mask = 0;
 519         struct hdac_bus *bus = &ebus->bus;
 520
 521         if (!bus->drsmcap) {
 522                 dev_err(bus->dev, "Address of DRSM capability is NULL\n");
 523                 return;
 524         }
 525
 526         mask |= (1 << index);
 527
 528         register_mask = readl(bus->drsmcap + AZX_REG_SPB_SPBFCCTL);
 529
 530         mask |= register_mask;
 531
 532         if (enable)
 533                 snd_hdac_updatel(bus->drsmcap, AZX_REG_DRSM_CTL, 0, mask);
 534         else
 535                 snd_hdac_updatel(bus->drsmcap, AZX_REG_DRSM_CTL, mask, 0);
 536 }
 537 EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_drsm_enable);
 538
 539 /**
 540  * snd_hdac_ext_stream_set_dpibr - sets the dpibr value of a stream
 541  * @ebus: HD-audio ext core bus
 542  * @stream: hdac_ext_stream
 543  * @value: dpib value to set
 544  */
 545 int snd_hdac_ext_stream_set_dpibr(struct hdac_ext_bus *ebus,
 546                                  struct hdac_ext_stream *stream, u32 value)
 547 {
 548         struct hdac_bus *bus = &ebus->bus;
 549
 550         if (!bus->drsmcap) {
 551                 dev_err(bus->dev, "Address of DRSM capability is NULL\n");
 552                 return -EINVAL;
 553         }
 554
 555         writel(value, stream->dpibr_addr);
 556
 557         return 0;
 558 }
 559 EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_set_dpibr);
 560
 561 /**
 562  * snd_hdac_ext_stream_set_lpib - sets the lpib value of a stream
 563  * @ebus: HD-audio ext core bus
 564  * @stream: hdac_ext_stream
 565  * @value: lpib value to set
 566  */
 567 int snd_hdac_ext_stream_set_lpib(struct hdac_ext_stream *stream, u32 value)
 568 {
 569         snd_hdac_stream_writel(&stream->hstream, SD_LPIB, value);
 570
 571         return 0;
 572 }
 573 EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_set_lpib);