Jeeja KP | df203a4 | 2015-06-11 14:11:49 +0530 | [diff] [blame] | 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> |
Vinod Koul | e7a3484 | 2015-06-17 11:20:16 +0530 | [diff] [blame] | 21 | #include <linux/slab.h> |
Jeeja KP | df203a4 | 2015-06-11 14:11:49 +0530 | [diff] [blame] | 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 | |
Jeeja KP | ee8bc4d | 2015-08-21 21:36:20 +0530 | [diff] [blame] | 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 | |
Jeeja KP | df203a4 | 2015-06-11 14:11:49 +0530 | [diff] [blame] | 62 | stream->decoupled = false; |
| 63 | snd_hdac_stream_init(bus, &stream->hstream, idx, direction, tag); |
| 64 | } |
| 65 | EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_init); |
| 66 | |
| 67 | /** |
Vinod Koul | e7a3484 | 2015-06-17 11:20:16 +0530 | [diff] [blame] | 68 | * snd_hdac_ext_stream_init_all - create and initialize the stream objects |
| 69 | * for an extended hda bus |
| 70 | * @ebus: HD-audio ext core bus |
| 71 | * @start_idx: start index for streams |
| 72 | * @num_stream: number of streams to initialize |
| 73 | * @dir: direction of streams |
| 74 | */ |
| 75 | int snd_hdac_ext_stream_init_all(struct hdac_ext_bus *ebus, int start_idx, |
| 76 | int num_stream, int dir) |
| 77 | { |
| 78 | int stream_tag = 0; |
| 79 | int i, tag, idx = start_idx; |
| 80 | |
| 81 | for (i = 0; i < num_stream; i++) { |
| 82 | struct hdac_ext_stream *stream = |
| 83 | kzalloc(sizeof(*stream), GFP_KERNEL); |
| 84 | if (!stream) |
| 85 | return -ENOMEM; |
| 86 | tag = ++stream_tag; |
| 87 | snd_hdac_ext_stream_init(ebus, stream, idx, dir, tag); |
| 88 | idx++; |
| 89 | } |
| 90 | |
| 91 | return 0; |
| 92 | |
| 93 | } |
| 94 | EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_init_all); |
| 95 | |
| 96 | /** |
| 97 | * snd_hdac_stream_free_all - free hdac extended stream objects |
| 98 | * |
| 99 | * @ebus: HD-audio ext core bus |
| 100 | */ |
| 101 | void snd_hdac_stream_free_all(struct hdac_ext_bus *ebus) |
| 102 | { |
| 103 | struct hdac_stream *s; |
| 104 | struct hdac_ext_stream *stream; |
| 105 | struct hdac_bus *bus = ebus_to_hbus(ebus); |
| 106 | |
| 107 | while (!list_empty(&bus->stream_list)) { |
| 108 | s = list_first_entry(&bus->stream_list, struct hdac_stream, list); |
| 109 | stream = stream_to_hdac_ext_stream(s); |
| 110 | list_del(&s->list); |
| 111 | kfree(stream); |
| 112 | } |
| 113 | } |
| 114 | EXPORT_SYMBOL_GPL(snd_hdac_stream_free_all); |
| 115 | |
| 116 | /** |
Jeeja KP | df203a4 | 2015-06-11 14:11:49 +0530 | [diff] [blame] | 117 | * snd_hdac_ext_stream_decouple - decouple the hdac stream |
| 118 | * @ebus: HD-audio ext core bus |
| 119 | * @stream: HD-audio ext core stream object to initialize |
| 120 | * @decouple: flag to decouple |
| 121 | */ |
| 122 | void snd_hdac_ext_stream_decouple(struct hdac_ext_bus *ebus, |
| 123 | struct hdac_ext_stream *stream, bool decouple) |
| 124 | { |
| 125 | struct hdac_stream *hstream = &stream->hstream; |
| 126 | struct hdac_bus *bus = &ebus->bus; |
| 127 | |
| 128 | spin_lock_irq(&bus->reg_lock); |
| 129 | if (decouple) |
| 130 | snd_hdac_updatel(ebus->ppcap, AZX_REG_PP_PPCTL, 0, |
| 131 | AZX_PPCTL_PROCEN(hstream->index)); |
| 132 | else |
| 133 | snd_hdac_updatel(ebus->ppcap, AZX_REG_PP_PPCTL, |
| 134 | AZX_PPCTL_PROCEN(hstream->index), 0); |
| 135 | stream->decoupled = decouple; |
| 136 | spin_unlock_irq(&bus->reg_lock); |
| 137 | } |
| 138 | EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_decouple); |
| 139 | |
| 140 | /** |
| 141 | * snd_hdac_ext_linkstream_start - start a stream |
| 142 | * @stream: HD-audio ext core stream to start |
| 143 | */ |
| 144 | void snd_hdac_ext_link_stream_start(struct hdac_ext_stream *stream) |
| 145 | { |
| 146 | snd_hdac_updatel(stream->pplc_addr, AZX_REG_PPLCCTL, 0, AZX_PPLCCTL_RUN); |
| 147 | } |
| 148 | EXPORT_SYMBOL_GPL(snd_hdac_ext_link_stream_start); |
| 149 | |
| 150 | /** |
| 151 | * snd_hdac_ext_link_stream_clear - stop a stream DMA |
| 152 | * @stream: HD-audio ext core stream to stop |
| 153 | */ |
| 154 | void snd_hdac_ext_link_stream_clear(struct hdac_ext_stream *stream) |
| 155 | { |
| 156 | snd_hdac_updatel(stream->pplc_addr, AZX_REG_PPLCCTL, AZX_PPLCCTL_RUN, 0); |
| 157 | } |
| 158 | EXPORT_SYMBOL_GPL(snd_hdac_ext_link_stream_clear); |
| 159 | |
| 160 | /** |
| 161 | * snd_hdac_ext_link_stream_reset - reset a stream |
| 162 | * @stream: HD-audio ext core stream to reset |
| 163 | */ |
| 164 | void snd_hdac_ext_link_stream_reset(struct hdac_ext_stream *stream) |
| 165 | { |
| 166 | unsigned char val; |
| 167 | int timeout; |
| 168 | |
| 169 | snd_hdac_ext_link_stream_clear(stream); |
| 170 | |
| 171 | snd_hdac_updatel(stream->pplc_addr, AZX_REG_PPLCCTL, 0, AZX_PPLCCTL_STRST); |
| 172 | udelay(3); |
| 173 | timeout = 50; |
| 174 | do { |
| 175 | val = readl(stream->pplc_addr + AZX_REG_PPLCCTL) & |
| 176 | AZX_PPLCCTL_STRST; |
| 177 | if (val) |
| 178 | break; |
| 179 | udelay(3); |
| 180 | } while (--timeout); |
| 181 | val &= ~AZX_PPLCCTL_STRST; |
| 182 | writel(val, stream->pplc_addr + AZX_REG_PPLCCTL); |
| 183 | udelay(3); |
| 184 | |
| 185 | timeout = 50; |
| 186 | /* waiting for hardware to report that the stream is out of reset */ |
| 187 | do { |
| 188 | val = readl(stream->pplc_addr + AZX_REG_PPLCCTL) & AZX_PPLCCTL_STRST; |
| 189 | if (!val) |
| 190 | break; |
| 191 | udelay(3); |
| 192 | } while (--timeout); |
| 193 | |
| 194 | } |
| 195 | EXPORT_SYMBOL_GPL(snd_hdac_ext_link_stream_reset); |
| 196 | |
| 197 | /** |
| 198 | * snd_hdac_ext_link_stream_setup - set up the SD for streaming |
| 199 | * @stream: HD-audio ext core stream to set up |
| 200 | * @fmt: stream format |
| 201 | */ |
| 202 | int snd_hdac_ext_link_stream_setup(struct hdac_ext_stream *stream, int fmt) |
| 203 | { |
| 204 | struct hdac_stream *hstream = &stream->hstream; |
| 205 | unsigned int val; |
| 206 | |
| 207 | /* make sure the run bit is zero for SD */ |
| 208 | snd_hdac_ext_link_stream_clear(stream); |
| 209 | /* program the stream_tag */ |
| 210 | val = readl(stream->pplc_addr + AZX_REG_PPLCCTL); |
| 211 | val = (val & ~AZX_PPLCCTL_STRM_MASK) | |
| 212 | (hstream->stream_tag << AZX_PPLCCTL_STRM_SHIFT); |
| 213 | writel(val, stream->pplc_addr + AZX_REG_PPLCCTL); |
| 214 | |
| 215 | /* program the stream format */ |
| 216 | writew(fmt, stream->pplc_addr + AZX_REG_PPLCFMT); |
| 217 | |
| 218 | return 0; |
| 219 | } |
| 220 | EXPORT_SYMBOL_GPL(snd_hdac_ext_link_stream_setup); |
| 221 | |
| 222 | /** |
| 223 | * snd_hdac_ext_link_set_stream_id - maps stream id to link output |
| 224 | * @link: HD-audio ext link to set up |
| 225 | * @stream: stream id |
| 226 | */ |
| 227 | void snd_hdac_ext_link_set_stream_id(struct hdac_ext_link *link, |
| 228 | int stream) |
| 229 | { |
| 230 | snd_hdac_updatew(link->ml_addr, AZX_REG_ML_LOSIDV, (1 << stream), 0); |
| 231 | } |
| 232 | EXPORT_SYMBOL_GPL(snd_hdac_ext_link_set_stream_id); |
| 233 | |
| 234 | /** |
| 235 | * snd_hdac_ext_link_clear_stream_id - maps stream id to link output |
| 236 | * @link: HD-audio ext link to set up |
| 237 | * @stream: stream id |
| 238 | */ |
| 239 | void snd_hdac_ext_link_clear_stream_id(struct hdac_ext_link *link, |
| 240 | int stream) |
| 241 | { |
| 242 | snd_hdac_updatew(link->ml_addr, AZX_REG_ML_LOSIDV, 0, (1 << stream)); |
| 243 | } |
| 244 | EXPORT_SYMBOL_GPL(snd_hdac_ext_link_clear_stream_id); |
| 245 | |
| 246 | static struct hdac_ext_stream * |
| 247 | hdac_ext_link_stream_assign(struct hdac_ext_bus *ebus, |
| 248 | struct snd_pcm_substream *substream) |
| 249 | { |
| 250 | struct hdac_ext_stream *res = NULL; |
| 251 | struct hdac_stream *stream = NULL; |
| 252 | struct hdac_bus *hbus = &ebus->bus; |
| 253 | |
| 254 | if (!ebus->ppcap) { |
| 255 | dev_err(hbus->dev, "stream type not supported\n"); |
| 256 | return NULL; |
| 257 | } |
| 258 | |
| 259 | list_for_each_entry(stream, &hbus->stream_list, list) { |
| 260 | struct hdac_ext_stream *hstream = container_of(stream, |
| 261 | struct hdac_ext_stream, |
| 262 | hstream); |
| 263 | if (stream->direction != substream->stream) |
| 264 | continue; |
| 265 | |
| 266 | /* check if decoupled stream and not in use is available */ |
| 267 | if (hstream->decoupled && !hstream->link_locked) { |
| 268 | res = hstream; |
| 269 | break; |
| 270 | } |
| 271 | |
| 272 | if (!hstream->link_locked) { |
| 273 | snd_hdac_ext_stream_decouple(ebus, hstream, true); |
| 274 | res = hstream; |
| 275 | break; |
| 276 | } |
| 277 | } |
| 278 | if (res) { |
| 279 | spin_lock_irq(&hbus->reg_lock); |
| 280 | res->link_locked = 1; |
| 281 | res->link_substream = substream; |
| 282 | spin_unlock_irq(&hbus->reg_lock); |
| 283 | } |
| 284 | return res; |
| 285 | } |
| 286 | |
| 287 | static struct hdac_ext_stream * |
| 288 | hdac_ext_host_stream_assign(struct hdac_ext_bus *ebus, |
| 289 | struct snd_pcm_substream *substream) |
| 290 | { |
| 291 | struct hdac_ext_stream *res = NULL; |
| 292 | struct hdac_stream *stream = NULL; |
| 293 | struct hdac_bus *hbus = &ebus->bus; |
Jeeja KP | df203a4 | 2015-06-11 14:11:49 +0530 | [diff] [blame] | 294 | |
| 295 | if (!ebus->ppcap) { |
| 296 | dev_err(hbus->dev, "stream type not supported\n"); |
| 297 | return NULL; |
| 298 | } |
| 299 | |
Jeeja KP | df203a4 | 2015-06-11 14:11:49 +0530 | [diff] [blame] | 300 | list_for_each_entry(stream, &hbus->stream_list, list) { |
| 301 | struct hdac_ext_stream *hstream = container_of(stream, |
| 302 | struct hdac_ext_stream, |
| 303 | hstream); |
| 304 | if (stream->direction != substream->stream) |
| 305 | continue; |
| 306 | |
Jeeja KP | 9b06dc9 | 2015-08-04 09:28:38 +0530 | [diff] [blame] | 307 | if (!stream->opened) { |
Jeeja KP | df203a4 | 2015-06-11 14:11:49 +0530 | [diff] [blame] | 308 | if (!hstream->decoupled) |
| 309 | snd_hdac_ext_stream_decouple(ebus, hstream, true); |
| 310 | res = hstream; |
| 311 | break; |
| 312 | } |
| 313 | } |
| 314 | if (res) { |
| 315 | spin_lock_irq(&hbus->reg_lock); |
| 316 | res->hstream.opened = 1; |
| 317 | res->hstream.running = 0; |
Jeeja KP | df203a4 | 2015-06-11 14:11:49 +0530 | [diff] [blame] | 318 | res->hstream.substream = substream; |
| 319 | spin_unlock_irq(&hbus->reg_lock); |
| 320 | } |
| 321 | |
| 322 | return res; |
| 323 | } |
| 324 | |
| 325 | /** |
| 326 | * snd_hdac_ext_stream_assign - assign a stream for the PCM |
| 327 | * @ebus: HD-audio ext core bus |
| 328 | * @substream: PCM substream to assign |
| 329 | * @type: type of stream (coupled, host or link stream) |
| 330 | * |
| 331 | * This assigns the stream based on the type (coupled/host/link), for the |
| 332 | * given PCM substream, assigns it and returns the stream object |
| 333 | * |
| 334 | * coupled: Looks for an unused stream |
| 335 | * host: Looks for an unused decoupled host stream |
| 336 | * link: Looks for an unused decoupled link stream |
| 337 | * |
| 338 | * If no stream is free, returns NULL. The function tries to keep using |
| 339 | * the same stream object when it's used beforehand. when a stream is |
| 340 | * decoupled, it becomes a host stream and link stream. |
| 341 | */ |
| 342 | struct hdac_ext_stream *snd_hdac_ext_stream_assign(struct hdac_ext_bus *ebus, |
| 343 | struct snd_pcm_substream *substream, |
| 344 | int type) |
| 345 | { |
| 346 | struct hdac_ext_stream *hstream = NULL; |
| 347 | struct hdac_stream *stream = NULL; |
| 348 | struct hdac_bus *hbus = &ebus->bus; |
| 349 | |
| 350 | switch (type) { |
| 351 | case HDAC_EXT_STREAM_TYPE_COUPLED: |
| 352 | stream = snd_hdac_stream_assign(hbus, substream); |
| 353 | if (stream) |
| 354 | hstream = container_of(stream, |
| 355 | struct hdac_ext_stream, hstream); |
| 356 | return hstream; |
| 357 | |
| 358 | case HDAC_EXT_STREAM_TYPE_HOST: |
| 359 | return hdac_ext_host_stream_assign(ebus, substream); |
| 360 | |
| 361 | case HDAC_EXT_STREAM_TYPE_LINK: |
| 362 | return hdac_ext_link_stream_assign(ebus, substream); |
| 363 | |
| 364 | default: |
| 365 | return NULL; |
| 366 | } |
| 367 | } |
| 368 | EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_assign); |
| 369 | |
| 370 | /** |
| 371 | * snd_hdac_ext_stream_release - release the assigned stream |
| 372 | * @stream: HD-audio ext core stream to release |
| 373 | * @type: type of stream (coupled, host or link stream) |
| 374 | * |
| 375 | * Release the stream that has been assigned by snd_hdac_ext_stream_assign(). |
| 376 | */ |
| 377 | void snd_hdac_ext_stream_release(struct hdac_ext_stream *stream, int type) |
| 378 | { |
| 379 | struct hdac_bus *bus = stream->hstream.bus; |
| 380 | struct hdac_ext_bus *ebus = hbus_to_ebus(bus); |
| 381 | |
| 382 | switch (type) { |
| 383 | case HDAC_EXT_STREAM_TYPE_COUPLED: |
| 384 | snd_hdac_stream_release(&stream->hstream); |
| 385 | break; |
| 386 | |
| 387 | case HDAC_EXT_STREAM_TYPE_HOST: |
| 388 | if (stream->decoupled) { |
| 389 | snd_hdac_ext_stream_decouple(ebus, stream, false); |
| 390 | snd_hdac_stream_release(&stream->hstream); |
| 391 | } |
| 392 | break; |
| 393 | |
| 394 | case HDAC_EXT_STREAM_TYPE_LINK: |
| 395 | if (stream->decoupled) |
| 396 | snd_hdac_ext_stream_decouple(ebus, stream, false); |
| 397 | spin_lock_irq(&bus->reg_lock); |
| 398 | stream->link_locked = 0; |
| 399 | stream->link_substream = NULL; |
| 400 | spin_unlock_irq(&bus->reg_lock); |
| 401 | break; |
| 402 | |
| 403 | default: |
| 404 | dev_dbg(bus->dev, "Invalid type %d\n", type); |
| 405 | } |
| 406 | |
| 407 | } |
| 408 | EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_release); |
| 409 | |
| 410 | /** |
| 411 | * snd_hdac_ext_stream_spbcap_enable - enable SPIB for a stream |
| 412 | * @ebus: HD-audio ext core bus |
| 413 | * @enable: flag to enable/disable SPIB |
| 414 | * @index: stream index for which SPIB need to be enabled |
| 415 | */ |
| 416 | void snd_hdac_ext_stream_spbcap_enable(struct hdac_ext_bus *ebus, |
| 417 | bool enable, int index) |
| 418 | { |
| 419 | u32 mask = 0; |
| 420 | u32 register_mask = 0; |
| 421 | struct hdac_bus *bus = &ebus->bus; |
| 422 | |
| 423 | if (!ebus->spbcap) { |
| 424 | dev_err(bus->dev, "Address of SPB capability is NULL"); |
| 425 | return; |
| 426 | } |
| 427 | |
| 428 | mask |= (1 << index); |
| 429 | |
Jeeja KP | a7e3dd8 | 2015-08-21 21:36:17 +0530 | [diff] [blame] | 430 | register_mask = readl(ebus->spbcap + AZX_REG_SPB_SPBFCCTL); |
Jeeja KP | df203a4 | 2015-06-11 14:11:49 +0530 | [diff] [blame] | 431 | |
| 432 | mask |= register_mask; |
| 433 | |
| 434 | if (enable) |
| 435 | snd_hdac_updatel(ebus->spbcap, AZX_REG_SPB_SPBFCCTL, 0, mask); |
| 436 | else |
| 437 | snd_hdac_updatel(ebus->spbcap, AZX_REG_SPB_SPBFCCTL, mask, 0); |
| 438 | } |
| 439 | EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_spbcap_enable); |
| 440 | |
| 441 | /** |
Jeeja KP | ee8bc4d | 2015-08-21 21:36:20 +0530 | [diff] [blame] | 442 | * snd_hdac_ext_stream_set_spib - sets the spib value of a stream |
| 443 | * @ebus: HD-audio ext core bus |
| 444 | * @stream: hdac_ext_stream |
| 445 | * @value: spib value to set |
| 446 | */ |
| 447 | int snd_hdac_ext_stream_set_spib(struct hdac_ext_bus *ebus, |
| 448 | struct hdac_ext_stream *stream, u32 value) |
| 449 | { |
| 450 | struct hdac_bus *bus = &ebus->bus; |
| 451 | |
| 452 | if (!ebus->spbcap) { |
| 453 | dev_err(bus->dev, "Address of SPB capability is NULL"); |
| 454 | return -EINVAL; |
| 455 | } |
| 456 | |
| 457 | writel(value, stream->spib_addr); |
| 458 | |
| 459 | return 0; |
| 460 | } |
| 461 | EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_set_spib); |
| 462 | |
| 463 | /** |
Vinod Koul | 54d1d2f | 2015-08-23 11:52:50 +0530 | [diff] [blame] | 464 | * snd_hdac_ext_stream_get_spbmaxfifo - gets the spib value of a stream |
Jeeja KP | ee8bc4d | 2015-08-21 21:36:20 +0530 | [diff] [blame] | 465 | * @ebus: HD-audio ext core bus |
| 466 | * @stream: hdac_ext_stream |
| 467 | * |
| 468 | * Return maxfifo for the stream |
| 469 | */ |
Vinod Koul | 54d1d2f | 2015-08-23 11:52:50 +0530 | [diff] [blame] | 470 | int snd_hdac_ext_stream_get_spbmaxfifo(struct hdac_ext_bus *ebus, |
Jeeja KP | ee8bc4d | 2015-08-21 21:36:20 +0530 | [diff] [blame] | 471 | struct hdac_ext_stream *stream) |
| 472 | { |
| 473 | struct hdac_bus *bus = &ebus->bus; |
| 474 | |
| 475 | if (!ebus->spbcap) { |
| 476 | dev_err(bus->dev, "Address of SPB capability is NULL"); |
| 477 | return -EINVAL; |
| 478 | } |
| 479 | |
| 480 | return readl(stream->fifo_addr); |
| 481 | } |
Vinod Koul | 54d1d2f | 2015-08-23 11:52:50 +0530 | [diff] [blame] | 482 | EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_get_spbmaxfifo); |
Jeeja KP | ee8bc4d | 2015-08-21 21:36:20 +0530 | [diff] [blame] | 483 | |
| 484 | |
| 485 | /** |
Jeeja KP | df203a4 | 2015-06-11 14:11:49 +0530 | [diff] [blame] | 486 | * snd_hdac_ext_stop_streams - stop all stream if running |
| 487 | * @ebus: HD-audio ext core bus |
| 488 | */ |
| 489 | void snd_hdac_ext_stop_streams(struct hdac_ext_bus *ebus) |
| 490 | { |
| 491 | struct hdac_bus *bus = ebus_to_hbus(ebus); |
| 492 | struct hdac_stream *stream; |
| 493 | |
| 494 | if (bus->chip_init) { |
| 495 | list_for_each_entry(stream, &bus->stream_list, list) |
| 496 | snd_hdac_stream_stop(stream); |
| 497 | snd_hdac_bus_stop_chip(bus); |
| 498 | } |
| 499 | } |
| 500 | EXPORT_SYMBOL_GPL(snd_hdac_ext_stop_streams); |