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linux_dsm_epyc7002/sound/hda/ext/hdac_ext_stream.c
Thomas Gleixner 8e8e69d67e treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 285 
Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation version 2 of the license this program
  is distributed in the hope that it will be useful but without any
  warranty without even the implied warranty of merchantability or
  fitness for a particular purpose see the gnu general public license
  for more details

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 100 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Alexios Zavras <alexios.zavras@intel.com>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190529141900.918357685@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-06-05 17:36:37 +02:00

544 lines
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// SPDX-License-Identifier: GPL-2.0-only
/*
* hdac-ext-stream.c - HD-audio extended stream operations.
*
* Copyright (C) 2015 Intel Corp
* Author: Jeeja KP <jeeja.kp@intel.com>
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*/
#include <linux/delay.h>
#include <linux/slab.h>
#include <sound/pcm.h>
#include <sound/hda_register.h>
#include <sound/hdaudio_ext.h>
/**
* snd_hdac_ext_stream_init - initialize each stream (aka device)
* @bus: HD-audio core bus
* @stream: HD-audio ext core stream object to initialize
* @idx: stream index number
* @direction: stream direction (SNDRV_PCM_STREAM_PLAYBACK or SNDRV_PCM_STREAM_CAPTURE)
* @tag: the tag id to assign
*
* initialize the stream, if ppcap is enabled then init those and then
* invoke hdac stream initialization routine
*/
void snd_hdac_ext_stream_init(struct hdac_bus *bus,
struct hdac_ext_stream *stream,
int idx, int direction, int tag)
{
if (bus->ppcap) {
stream->pphc_addr = bus->ppcap + AZX_PPHC_BASE +
AZX_PPHC_INTERVAL * idx;
stream->pplc_addr = bus->ppcap + AZX_PPLC_BASE +
AZX_PPLC_MULTI * bus->num_streams +
AZX_PPLC_INTERVAL * idx;
}
if (bus->spbcap) {
stream->spib_addr = bus->spbcap + AZX_SPB_BASE +
AZX_SPB_INTERVAL * idx +
AZX_SPB_SPIB;
stream->fifo_addr = bus->spbcap + AZX_SPB_BASE +
AZX_SPB_INTERVAL * idx +
AZX_SPB_MAXFIFO;
}
if (bus->drsmcap)
stream->dpibr_addr = bus->drsmcap + AZX_DRSM_BASE +
AZX_DRSM_INTERVAL * idx;
stream->decoupled = false;
snd_hdac_stream_init(bus, &stream->hstream, idx, direction, tag);
}
EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_init);
/**
* snd_hdac_ext_stream_init_all - create and initialize the stream objects
* for an extended hda bus
* @bus: HD-audio core bus
* @start_idx: start index for streams
* @num_stream: number of streams to initialize
* @dir: direction of streams
*/
int snd_hdac_ext_stream_init_all(struct hdac_bus *bus, int start_idx,
int num_stream, int dir)
{
int stream_tag = 0;
int i, tag, idx = start_idx;
for (i = 0; i < num_stream; i++) {
struct hdac_ext_stream *stream =
kzalloc(sizeof(*stream), GFP_KERNEL);
if (!stream)
return -ENOMEM;
tag = ++stream_tag;
snd_hdac_ext_stream_init(bus, stream, idx, dir, tag);
idx++;
}
return 0;
}
EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_init_all);
/**
* snd_hdac_stream_free_all - free hdac extended stream objects
*
* @bus: HD-audio core bus
*/
void snd_hdac_stream_free_all(struct hdac_bus *bus)
{
struct hdac_stream *s, *_s;
struct hdac_ext_stream *stream;
list_for_each_entry_safe(s, _s, &bus->stream_list, list) {
stream = stream_to_hdac_ext_stream(s);
snd_hdac_ext_stream_decouple(bus, stream, false);
list_del(&s->list);
kfree(stream);
}
}
EXPORT_SYMBOL_GPL(snd_hdac_stream_free_all);
/**
* snd_hdac_ext_stream_decouple - decouple the hdac stream
* @bus: HD-audio core bus
* @stream: HD-audio ext core stream object to initialize
* @decouple: flag to decouple
*/
void snd_hdac_ext_stream_decouple(struct hdac_bus *bus,
struct hdac_ext_stream *stream, bool decouple)
{
struct hdac_stream *hstream = &stream->hstream;
u32 val;
int mask = AZX_PPCTL_PROCEN(hstream->index);
spin_lock_irq(&bus->reg_lock);
val = readw(bus->ppcap + AZX_REG_PP_PPCTL) & mask;
if (decouple && !val)
snd_hdac_updatel(bus->ppcap, AZX_REG_PP_PPCTL, mask, mask);
else if (!decouple && val)
snd_hdac_updatel(bus->ppcap, AZX_REG_PP_PPCTL, mask, 0);
stream->decoupled = decouple;
spin_unlock_irq(&bus->reg_lock);
}
EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_decouple);
/**
* snd_hdac_ext_linkstream_start - start a stream
* @stream: HD-audio ext core stream to start
*/
void snd_hdac_ext_link_stream_start(struct hdac_ext_stream *stream)
{
snd_hdac_updatel(stream->pplc_addr, AZX_REG_PPLCCTL,
AZX_PPLCCTL_RUN, AZX_PPLCCTL_RUN);
}
EXPORT_SYMBOL_GPL(snd_hdac_ext_link_stream_start);
/**
* snd_hdac_ext_link_stream_clear - stop a stream DMA
* @stream: HD-audio ext core stream to stop
*/
void snd_hdac_ext_link_stream_clear(struct hdac_ext_stream *stream)
{
snd_hdac_updatel(stream->pplc_addr, AZX_REG_PPLCCTL, AZX_PPLCCTL_RUN, 0);
}
EXPORT_SYMBOL_GPL(snd_hdac_ext_link_stream_clear);
/**
* snd_hdac_ext_link_stream_reset - reset a stream
* @stream: HD-audio ext core stream to reset
*/
void snd_hdac_ext_link_stream_reset(struct hdac_ext_stream *stream)
{
unsigned char val;
int timeout;
snd_hdac_ext_link_stream_clear(stream);
snd_hdac_updatel(stream->pplc_addr, AZX_REG_PPLCCTL,
AZX_PPLCCTL_STRST, AZX_PPLCCTL_STRST);
udelay(3);
timeout = 50;
do {
val = readl(stream->pplc_addr + AZX_REG_PPLCCTL) &
AZX_PPLCCTL_STRST;
if (val)
break;
udelay(3);
} while (--timeout);
val &= ~AZX_PPLCCTL_STRST;
writel(val, stream->pplc_addr + AZX_REG_PPLCCTL);
udelay(3);
timeout = 50;
/* waiting for hardware to report that the stream is out of reset */
do {
val = readl(stream->pplc_addr + AZX_REG_PPLCCTL) & AZX_PPLCCTL_STRST;
if (!val)
break;
udelay(3);
} while (--timeout);
}
EXPORT_SYMBOL_GPL(snd_hdac_ext_link_stream_reset);
/**
* snd_hdac_ext_link_stream_setup - set up the SD for streaming
* @stream: HD-audio ext core stream to set up
* @fmt: stream format
*/
int snd_hdac_ext_link_stream_setup(struct hdac_ext_stream *stream, int fmt)
{
struct hdac_stream *hstream = &stream->hstream;
unsigned int val;
/* make sure the run bit is zero for SD */
snd_hdac_ext_link_stream_clear(stream);
/* program the stream_tag */
val = readl(stream->pplc_addr + AZX_REG_PPLCCTL);
val = (val & ~AZX_PPLCCTL_STRM_MASK) |
(hstream->stream_tag << AZX_PPLCCTL_STRM_SHIFT);
writel(val, stream->pplc_addr + AZX_REG_PPLCCTL);
/* program the stream format */
writew(fmt, stream->pplc_addr + AZX_REG_PPLCFMT);
return 0;
}
EXPORT_SYMBOL_GPL(snd_hdac_ext_link_stream_setup);
/**
* snd_hdac_ext_link_set_stream_id - maps stream id to link output
* @link: HD-audio ext link to set up
* @stream: stream id
*/
void snd_hdac_ext_link_set_stream_id(struct hdac_ext_link *link,
int stream)
{
snd_hdac_updatew(link->ml_addr, AZX_REG_ML_LOSIDV, (1 << stream), 1 << stream);
}
EXPORT_SYMBOL_GPL(snd_hdac_ext_link_set_stream_id);
/**
* snd_hdac_ext_link_clear_stream_id - maps stream id to link output
* @link: HD-audio ext link to set up
* @stream: stream id
*/
void snd_hdac_ext_link_clear_stream_id(struct hdac_ext_link *link,
int stream)
{
snd_hdac_updatew(link->ml_addr, AZX_REG_ML_LOSIDV, (1 << stream), 0);
}
EXPORT_SYMBOL_GPL(snd_hdac_ext_link_clear_stream_id);
static struct hdac_ext_stream *
hdac_ext_link_stream_assign(struct hdac_bus *bus,
struct snd_pcm_substream *substream)
{
struct hdac_ext_stream *res = NULL;
struct hdac_stream *stream = NULL;
if (!bus->ppcap) {
dev_err(bus->dev, "stream type not supported\n");
return NULL;
}
list_for_each_entry(stream, &bus->stream_list, list) {
struct hdac_ext_stream *hstream = container_of(stream,
struct hdac_ext_stream,
hstream);
if (stream->direction != substream->stream)
continue;
/* check if decoupled stream and not in use is available */
if (hstream->decoupled && !hstream->link_locked) {
res = hstream;
break;
}
if (!hstream->link_locked) {
snd_hdac_ext_stream_decouple(bus, hstream, true);
res = hstream;
break;
}
}
if (res) {
spin_lock_irq(&bus->reg_lock);
res->link_locked = 1;
res->link_substream = substream;
spin_unlock_irq(&bus->reg_lock);
}
return res;
}
static struct hdac_ext_stream *
hdac_ext_host_stream_assign(struct hdac_bus *bus,
struct snd_pcm_substream *substream)
{
struct hdac_ext_stream *res = NULL;
struct hdac_stream *stream = NULL;
if (!bus->ppcap) {
dev_err(bus->dev, "stream type not supported\n");
return NULL;
}
list_for_each_entry(stream, &bus->stream_list, list) {
struct hdac_ext_stream *hstream = container_of(stream,
struct hdac_ext_stream,
hstream);
if (stream->direction != substream->stream)
continue;
if (!stream->opened) {
if (!hstream->decoupled)
snd_hdac_ext_stream_decouple(bus, hstream, true);
res = hstream;
break;
}
}
if (res) {
spin_lock_irq(&bus->reg_lock);
res->hstream.opened = 1;
res->hstream.running = 0;
res->hstream.substream = substream;
spin_unlock_irq(&bus->reg_lock);
}
return res;
}
/**
* snd_hdac_ext_stream_assign - assign a stream for the PCM
* @bus: HD-audio core bus
* @substream: PCM substream to assign
* @type: type of stream (coupled, host or link stream)
*
* This assigns the stream based on the type (coupled/host/link), for the
* given PCM substream, assigns it and returns the stream object
*
* coupled: Looks for an unused stream
* host: Looks for an unused decoupled host stream
* link: Looks for an unused decoupled link stream
*
* If no stream is free, returns NULL. The function tries to keep using
* the same stream object when it's used beforehand. when a stream is
* decoupled, it becomes a host stream and link stream.
*/
struct hdac_ext_stream *snd_hdac_ext_stream_assign(struct hdac_bus *bus,
struct snd_pcm_substream *substream,
int type)
{
struct hdac_ext_stream *hstream = NULL;
struct hdac_stream *stream = NULL;
switch (type) {
case HDAC_EXT_STREAM_TYPE_COUPLED:
stream = snd_hdac_stream_assign(bus, substream);
if (stream)
hstream = container_of(stream,
struct hdac_ext_stream, hstream);
return hstream;
case HDAC_EXT_STREAM_TYPE_HOST:
return hdac_ext_host_stream_assign(bus, substream);
case HDAC_EXT_STREAM_TYPE_LINK:
return hdac_ext_link_stream_assign(bus, substream);
default:
return NULL;
}
}
EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_assign);
/**
* snd_hdac_ext_stream_release - release the assigned stream
* @stream: HD-audio ext core stream to release
* @type: type of stream (coupled, host or link stream)
*
* Release the stream that has been assigned by snd_hdac_ext_stream_assign().
*/
void snd_hdac_ext_stream_release(struct hdac_ext_stream *stream, int type)
{
struct hdac_bus *bus = stream->hstream.bus;
switch (type) {
case HDAC_EXT_STREAM_TYPE_COUPLED:
snd_hdac_stream_release(&stream->hstream);
break;
case HDAC_EXT_STREAM_TYPE_HOST:
if (stream->decoupled && !stream->link_locked)
snd_hdac_ext_stream_decouple(bus, stream, false);
snd_hdac_stream_release(&stream->hstream);
break;
case HDAC_EXT_STREAM_TYPE_LINK:
if (stream->decoupled && !stream->hstream.opened)
snd_hdac_ext_stream_decouple(bus, stream, false);
spin_lock_irq(&bus->reg_lock);
stream->link_locked = 0;
stream->link_substream = NULL;
spin_unlock_irq(&bus->reg_lock);
break;
default:
dev_dbg(bus->dev, "Invalid type %d\n", type);
}
}
EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_release);
/**
* snd_hdac_ext_stream_spbcap_enable - enable SPIB for a stream
* @bus: HD-audio core bus
* @enable: flag to enable/disable SPIB
* @index: stream index for which SPIB need to be enabled
*/
void snd_hdac_ext_stream_spbcap_enable(struct hdac_bus *bus,
bool enable, int index)
{
u32 mask = 0;
if (!bus->spbcap) {
dev_err(bus->dev, "Address of SPB capability is NULL\n");
return;
}
mask |= (1 << index);
if (enable)
snd_hdac_updatel(bus->spbcap, AZX_REG_SPB_SPBFCCTL, mask, mask);
else
snd_hdac_updatel(bus->spbcap, AZX_REG_SPB_SPBFCCTL, mask, 0);
}
EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_spbcap_enable);
/**
* snd_hdac_ext_stream_set_spib - sets the spib value of a stream
* @bus: HD-audio core bus
* @stream: hdac_ext_stream
* @value: spib value to set
*/
int snd_hdac_ext_stream_set_spib(struct hdac_bus *bus,
struct hdac_ext_stream *stream, u32 value)
{
if (!bus->spbcap) {
dev_err(bus->dev, "Address of SPB capability is NULL\n");
return -EINVAL;
}
writel(value, stream->spib_addr);
return 0;
}
EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_set_spib);
/**
* snd_hdac_ext_stream_get_spbmaxfifo - gets the spib value of a stream
* @bus: HD-audio core bus
* @stream: hdac_ext_stream
*
* Return maxfifo for the stream
*/
int snd_hdac_ext_stream_get_spbmaxfifo(struct hdac_bus *bus,
struct hdac_ext_stream *stream)
{
if (!bus->spbcap) {
dev_err(bus->dev, "Address of SPB capability is NULL\n");
return -EINVAL;
}
return readl(stream->fifo_addr);
}
EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_get_spbmaxfifo);
/**
* snd_hdac_ext_stop_streams - stop all stream if running
* @bus: HD-audio core bus
*/
void snd_hdac_ext_stop_streams(struct hdac_bus *bus)
{
struct hdac_stream *stream;
if (bus->chip_init) {
list_for_each_entry(stream, &bus->stream_list, list)
snd_hdac_stream_stop(stream);
snd_hdac_bus_stop_chip(bus);
}
}
EXPORT_SYMBOL_GPL(snd_hdac_ext_stop_streams);
/**
* snd_hdac_ext_stream_drsm_enable - enable DMA resume for a stream
* @bus: HD-audio core bus
* @enable: flag to enable/disable DRSM
* @index: stream index for which DRSM need to be enabled
*/
void snd_hdac_ext_stream_drsm_enable(struct hdac_bus *bus,
bool enable, int index)
{
u32 mask = 0;
if (!bus->drsmcap) {
dev_err(bus->dev, "Address of DRSM capability is NULL\n");
return;
}
mask |= (1 << index);
if (enable)
snd_hdac_updatel(bus->drsmcap, AZX_REG_DRSM_CTL, mask, mask);
else
snd_hdac_updatel(bus->drsmcap, AZX_REG_DRSM_CTL, mask, 0);
}
EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_drsm_enable);
/**
* snd_hdac_ext_stream_set_dpibr - sets the dpibr value of a stream
* @bus: HD-audio core bus
* @stream: hdac_ext_stream
* @value: dpib value to set
*/
int snd_hdac_ext_stream_set_dpibr(struct hdac_bus *bus,
struct hdac_ext_stream *stream, u32 value)
{
if (!bus->drsmcap) {
dev_err(bus->dev, "Address of DRSM capability is NULL\n");
return -EINVAL;
}
writel(value, stream->dpibr_addr);
return 0;
}
EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_set_dpibr);
/**
* snd_hdac_ext_stream_set_lpib - sets the lpib value of a stream
* @bus: HD-audio core bus
* @stream: hdac_ext_stream
* @value: lpib value to set
*/
int snd_hdac_ext_stream_set_lpib(struct hdac_ext_stream *stream, u32 value)
{
snd_hdac_stream_writel(&stream->hstream, SD_LPIB, value);
return 0;
}
EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_set_lpib);
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