1 // SPDX-License-Identifier: GPL-2.0-only
3 * hdac-ext-stream.c - HD-audio extended stream operations.
5 * Copyright (C) 2015 Intel Corp
6 * Author: Jeeja KP <jeeja.kp@intel.com>
7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
9 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
12 #include <linux/delay.h>
13 #include <linux/slab.h>
14 #include <sound/pcm.h>
15 #include <sound/hda_register.h>
16 #include <sound/hdaudio_ext.h>
19 * snd_hdac_ext_stream_init - initialize each stream (aka device)
20 * @bus: HD-audio core bus
21 * @stream: HD-audio ext core stream object to initialize
22 * @idx: stream index number
23 * @direction: stream direction (SNDRV_PCM_STREAM_PLAYBACK or SNDRV_PCM_STREAM_CAPTURE)
24 * @tag: the tag id to assign
26 * initialize the stream, if ppcap is enabled then init those and then
27 * invoke hdac stream initialization routine
29 void snd_hdac_ext_stream_init(struct hdac_bus *bus,
30 struct hdac_ext_stream *stream,
31 int idx, int direction, int tag)
34 stream->pphc_addr = bus->ppcap + AZX_PPHC_BASE +
35 AZX_PPHC_INTERVAL * idx;
37 stream->pplc_addr = bus->ppcap + AZX_PPLC_BASE +
38 AZX_PPLC_MULTI * bus->num_streams +
39 AZX_PPLC_INTERVAL * idx;
43 stream->spib_addr = bus->spbcap + AZX_SPB_BASE +
44 AZX_SPB_INTERVAL * idx +
47 stream->fifo_addr = bus->spbcap + AZX_SPB_BASE +
48 AZX_SPB_INTERVAL * idx +
53 stream->dpibr_addr = bus->drsmcap + AZX_DRSM_BASE +
54 AZX_DRSM_INTERVAL * idx;
56 stream->decoupled = false;
57 snd_hdac_stream_init(bus, &stream->hstream, idx, direction, tag);
59 EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_init);
62 * snd_hdac_ext_stream_init_all - create and initialize the stream objects
63 * for an extended hda bus
64 * @bus: HD-audio core bus
65 * @start_idx: start index for streams
66 * @num_stream: number of streams to initialize
67 * @dir: direction of streams
69 int snd_hdac_ext_stream_init_all(struct hdac_bus *bus, int start_idx,
70 int num_stream, int dir)
73 int i, tag, idx = start_idx;
75 for (i = 0; i < num_stream; i++) {
76 struct hdac_ext_stream *stream =
77 kzalloc(sizeof(*stream), GFP_KERNEL);
81 snd_hdac_ext_stream_init(bus, stream, idx, dir, tag);
88 EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_init_all);
91 * snd_hdac_stream_free_all - free hdac extended stream objects
93 * @bus: HD-audio core bus
95 void snd_hdac_stream_free_all(struct hdac_bus *bus)
97 struct hdac_stream *s, *_s;
98 struct hdac_ext_stream *stream;
100 list_for_each_entry_safe(s, _s, &bus->stream_list, list) {
101 stream = stream_to_hdac_ext_stream(s);
102 snd_hdac_ext_stream_decouple(bus, stream, false);
107 EXPORT_SYMBOL_GPL(snd_hdac_stream_free_all);
110 * snd_hdac_ext_stream_decouple - decouple the hdac stream
111 * @bus: HD-audio core bus
112 * @stream: HD-audio ext core stream object to initialize
113 * @decouple: flag to decouple
115 void snd_hdac_ext_stream_decouple(struct hdac_bus *bus,
116 struct hdac_ext_stream *stream, bool decouple)
118 struct hdac_stream *hstream = &stream->hstream;
120 int mask = AZX_PPCTL_PROCEN(hstream->index);
122 spin_lock_irq(&bus->reg_lock);
123 val = readw(bus->ppcap + AZX_REG_PP_PPCTL) & mask;
125 if (decouple && !val)
126 snd_hdac_updatel(bus->ppcap, AZX_REG_PP_PPCTL, mask, mask);
127 else if (!decouple && val)
128 snd_hdac_updatel(bus->ppcap, AZX_REG_PP_PPCTL, mask, 0);
130 stream->decoupled = decouple;
131 spin_unlock_irq(&bus->reg_lock);
133 EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_decouple);
136 * snd_hdac_ext_linkstream_start - start a stream
137 * @stream: HD-audio ext core stream to start
139 void snd_hdac_ext_link_stream_start(struct hdac_ext_stream *stream)
141 snd_hdac_updatel(stream->pplc_addr, AZX_REG_PPLCCTL,
142 AZX_PPLCCTL_RUN, AZX_PPLCCTL_RUN);
144 EXPORT_SYMBOL_GPL(snd_hdac_ext_link_stream_start);
147 * snd_hdac_ext_link_stream_clear - stop a stream DMA
148 * @stream: HD-audio ext core stream to stop
150 void snd_hdac_ext_link_stream_clear(struct hdac_ext_stream *stream)
152 snd_hdac_updatel(stream->pplc_addr, AZX_REG_PPLCCTL, AZX_PPLCCTL_RUN, 0);
154 EXPORT_SYMBOL_GPL(snd_hdac_ext_link_stream_clear);
157 * snd_hdac_ext_link_stream_reset - reset a stream
158 * @stream: HD-audio ext core stream to reset
160 void snd_hdac_ext_link_stream_reset(struct hdac_ext_stream *stream)
165 snd_hdac_ext_link_stream_clear(stream);
167 snd_hdac_updatel(stream->pplc_addr, AZX_REG_PPLCCTL,
168 AZX_PPLCCTL_STRST, AZX_PPLCCTL_STRST);
172 val = readl(stream->pplc_addr + AZX_REG_PPLCCTL) &
178 val &= ~AZX_PPLCCTL_STRST;
179 writel(val, stream->pplc_addr + AZX_REG_PPLCCTL);
183 /* waiting for hardware to report that the stream is out of reset */
185 val = readl(stream->pplc_addr + AZX_REG_PPLCCTL) & AZX_PPLCCTL_STRST;
192 EXPORT_SYMBOL_GPL(snd_hdac_ext_link_stream_reset);
195 * snd_hdac_ext_link_stream_setup - set up the SD for streaming
196 * @stream: HD-audio ext core stream to set up
197 * @fmt: stream format
199 int snd_hdac_ext_link_stream_setup(struct hdac_ext_stream *stream, int fmt)
201 struct hdac_stream *hstream = &stream->hstream;
204 /* make sure the run bit is zero for SD */
205 snd_hdac_ext_link_stream_clear(stream);
206 /* program the stream_tag */
207 val = readl(stream->pplc_addr + AZX_REG_PPLCCTL);
208 val = (val & ~AZX_PPLCCTL_STRM_MASK) |
209 (hstream->stream_tag << AZX_PPLCCTL_STRM_SHIFT);
210 writel(val, stream->pplc_addr + AZX_REG_PPLCCTL);
212 /* program the stream format */
213 writew(fmt, stream->pplc_addr + AZX_REG_PPLCFMT);
217 EXPORT_SYMBOL_GPL(snd_hdac_ext_link_stream_setup);
220 * snd_hdac_ext_link_set_stream_id - maps stream id to link output
221 * @link: HD-audio ext link to set up
224 void snd_hdac_ext_link_set_stream_id(struct hdac_ext_link *link,
227 snd_hdac_updatew(link->ml_addr, AZX_REG_ML_LOSIDV, (1 << stream), 1 << stream);
229 EXPORT_SYMBOL_GPL(snd_hdac_ext_link_set_stream_id);
232 * snd_hdac_ext_link_clear_stream_id - maps stream id to link output
233 * @link: HD-audio ext link to set up
236 void snd_hdac_ext_link_clear_stream_id(struct hdac_ext_link *link,
239 snd_hdac_updatew(link->ml_addr, AZX_REG_ML_LOSIDV, (1 << stream), 0);
241 EXPORT_SYMBOL_GPL(snd_hdac_ext_link_clear_stream_id);
243 static struct hdac_ext_stream *
244 hdac_ext_link_stream_assign(struct hdac_bus *bus,
245 struct snd_pcm_substream *substream)
247 struct hdac_ext_stream *res = NULL;
248 struct hdac_stream *stream = NULL;
251 dev_err(bus->dev, "stream type not supported\n");
255 list_for_each_entry(stream, &bus->stream_list, list) {
256 struct hdac_ext_stream *hstream = container_of(stream,
257 struct hdac_ext_stream,
259 if (stream->direction != substream->stream)
262 /* check if decoupled stream and not in use is available */
263 if (hstream->decoupled && !hstream->link_locked) {
268 if (!hstream->link_locked) {
269 snd_hdac_ext_stream_decouple(bus, hstream, true);
275 spin_lock_irq(&bus->reg_lock);
276 res->link_locked = 1;
277 res->link_substream = substream;
278 spin_unlock_irq(&bus->reg_lock);
283 static struct hdac_ext_stream *
284 hdac_ext_host_stream_assign(struct hdac_bus *bus,
285 struct snd_pcm_substream *substream)
287 struct hdac_ext_stream *res = NULL;
288 struct hdac_stream *stream = NULL;
291 dev_err(bus->dev, "stream type not supported\n");
295 list_for_each_entry(stream, &bus->stream_list, list) {
296 struct hdac_ext_stream *hstream = container_of(stream,
297 struct hdac_ext_stream,
299 if (stream->direction != substream->stream)
302 if (!stream->opened) {
303 if (!hstream->decoupled)
304 snd_hdac_ext_stream_decouple(bus, hstream, true);
310 spin_lock_irq(&bus->reg_lock);
311 res->hstream.opened = 1;
312 res->hstream.running = 0;
313 res->hstream.substream = substream;
314 spin_unlock_irq(&bus->reg_lock);
321 * snd_hdac_ext_stream_assign - assign a stream for the PCM
322 * @bus: HD-audio core bus
323 * @substream: PCM substream to assign
324 * @type: type of stream (coupled, host or link stream)
326 * This assigns the stream based on the type (coupled/host/link), for the
327 * given PCM substream, assigns it and returns the stream object
329 * coupled: Looks for an unused stream
330 * host: Looks for an unused decoupled host stream
331 * link: Looks for an unused decoupled link stream
333 * If no stream is free, returns NULL. The function tries to keep using
334 * the same stream object when it's used beforehand. when a stream is
335 * decoupled, it becomes a host stream and link stream.
337 struct hdac_ext_stream *snd_hdac_ext_stream_assign(struct hdac_bus *bus,
338 struct snd_pcm_substream *substream,
341 struct hdac_ext_stream *hstream = NULL;
342 struct hdac_stream *stream = NULL;
345 case HDAC_EXT_STREAM_TYPE_COUPLED:
346 stream = snd_hdac_stream_assign(bus, substream);
348 hstream = container_of(stream,
349 struct hdac_ext_stream, hstream);
352 case HDAC_EXT_STREAM_TYPE_HOST:
353 return hdac_ext_host_stream_assign(bus, substream);
355 case HDAC_EXT_STREAM_TYPE_LINK:
356 return hdac_ext_link_stream_assign(bus, substream);
362 EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_assign);
365 * snd_hdac_ext_stream_release - release the assigned stream
366 * @stream: HD-audio ext core stream to release
367 * @type: type of stream (coupled, host or link stream)
369 * Release the stream that has been assigned by snd_hdac_ext_stream_assign().
371 void snd_hdac_ext_stream_release(struct hdac_ext_stream *stream, int type)
373 struct hdac_bus *bus = stream->hstream.bus;
376 case HDAC_EXT_STREAM_TYPE_COUPLED:
377 snd_hdac_stream_release(&stream->hstream);
380 case HDAC_EXT_STREAM_TYPE_HOST:
381 if (stream->decoupled && !stream->link_locked)
382 snd_hdac_ext_stream_decouple(bus, stream, false);
383 snd_hdac_stream_release(&stream->hstream);
386 case HDAC_EXT_STREAM_TYPE_LINK:
387 if (stream->decoupled && !stream->hstream.opened)
388 snd_hdac_ext_stream_decouple(bus, stream, false);
389 spin_lock_irq(&bus->reg_lock);
390 stream->link_locked = 0;
391 stream->link_substream = NULL;
392 spin_unlock_irq(&bus->reg_lock);
396 dev_dbg(bus->dev, "Invalid type %d\n", type);
400 EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_release);
403 * snd_hdac_ext_stream_spbcap_enable - enable SPIB for a stream
404 * @bus: HD-audio core bus
405 * @enable: flag to enable/disable SPIB
406 * @index: stream index for which SPIB need to be enabled
408 void snd_hdac_ext_stream_spbcap_enable(struct hdac_bus *bus,
409 bool enable, int index)
414 dev_err(bus->dev, "Address of SPB capability is NULL\n");
418 mask |= (1 << index);
421 snd_hdac_updatel(bus->spbcap, AZX_REG_SPB_SPBFCCTL, mask, mask);
423 snd_hdac_updatel(bus->spbcap, AZX_REG_SPB_SPBFCCTL, mask, 0);
425 EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_spbcap_enable);
428 * snd_hdac_ext_stream_set_spib - sets the spib value of a stream
429 * @bus: HD-audio core bus
430 * @stream: hdac_ext_stream
431 * @value: spib value to set
433 int snd_hdac_ext_stream_set_spib(struct hdac_bus *bus,
434 struct hdac_ext_stream *stream, u32 value)
438 dev_err(bus->dev, "Address of SPB capability is NULL\n");
442 writel(value, stream->spib_addr);
446 EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_set_spib);
449 * snd_hdac_ext_stream_get_spbmaxfifo - gets the spib value of a stream
450 * @bus: HD-audio core bus
451 * @stream: hdac_ext_stream
453 * Return maxfifo for the stream
455 int snd_hdac_ext_stream_get_spbmaxfifo(struct hdac_bus *bus,
456 struct hdac_ext_stream *stream)
460 dev_err(bus->dev, "Address of SPB capability is NULL\n");
464 return readl(stream->fifo_addr);
466 EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_get_spbmaxfifo);
470 * snd_hdac_ext_stop_streams - stop all stream if running
471 * @bus: HD-audio core bus
473 void snd_hdac_ext_stop_streams(struct hdac_bus *bus)
475 struct hdac_stream *stream;
477 if (bus->chip_init) {
478 list_for_each_entry(stream, &bus->stream_list, list)
479 snd_hdac_stream_stop(stream);
480 snd_hdac_bus_stop_chip(bus);
483 EXPORT_SYMBOL_GPL(snd_hdac_ext_stop_streams);
486 * snd_hdac_ext_stream_drsm_enable - enable DMA resume for a stream
487 * @bus: HD-audio core bus
488 * @enable: flag to enable/disable DRSM
489 * @index: stream index for which DRSM need to be enabled
491 void snd_hdac_ext_stream_drsm_enable(struct hdac_bus *bus,
492 bool enable, int index)
497 dev_err(bus->dev, "Address of DRSM capability is NULL\n");
501 mask |= (1 << index);
504 snd_hdac_updatel(bus->drsmcap, AZX_REG_DRSM_CTL, mask, mask);
506 snd_hdac_updatel(bus->drsmcap, AZX_REG_DRSM_CTL, mask, 0);
508 EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_drsm_enable);
511 * snd_hdac_ext_stream_set_dpibr - sets the dpibr value of a stream
512 * @bus: HD-audio core bus
513 * @stream: hdac_ext_stream
514 * @value: dpib value to set
516 int snd_hdac_ext_stream_set_dpibr(struct hdac_bus *bus,
517 struct hdac_ext_stream *stream, u32 value)
521 dev_err(bus->dev, "Address of DRSM capability is NULL\n");
525 writel(value, stream->dpibr_addr);
529 EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_set_dpibr);
532 * snd_hdac_ext_stream_set_lpib - sets the lpib value of a stream
533 * @bus: HD-audio core bus
534 * @stream: hdac_ext_stream
535 * @value: lpib value to set
537 int snd_hdac_ext_stream_set_lpib(struct hdac_ext_stream *stream, u32 value)
539 snd_hdac_stream_writel(&stream->hstream, SD_LPIB, value);
543 EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_set_lpib);