// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
//
// This file is provided under a dual BSD/GPLv2 license. When using or
// redistributing this file, you may do so under either license.
//
// Copyright(c) 2018 Intel Corporation
//
// Authors: Liam Girdwood <[email protected]>
// Ranjani Sridharan <[email protected]>
// Rander Wang <[email protected]>
// Keyon Jie <[email protected]>
//
/*
* Hardware interface for generic Intel audio DSP HDA IP
*/
#include <linux/moduleparam.h>
#include <sound/hda_register.h>
#include <sound/pcm_params.h>
#include <trace/events/sof_intel.h>
#include "../sof-audio.h"
#include "../ops.h"
#include "hda.h"
#define SDnFMT_BASE(x) ((x) << 14)
#define SDnFMT_MULT(x) (((x) - 1) << 11)
#define SDnFMT_DIV(x) (((x) - 1) << 8)
#define SDnFMT_BITS(x) ((x) << 4)
#define SDnFMT_CHAN(x) ((x) << 0)
static bool hda_always_enable_dmi_l1;
module_param_named(always_enable_dmi_l1, hda_always_enable_dmi_l1, bool, 0444);
MODULE_PARM_DESC(always_enable_dmi_l1, "SOF HDA always enable DMI l1");
static bool hda_disable_rewinds;
module_param_named(disable_rewinds, hda_disable_rewinds, bool, 0444);
MODULE_PARM_DESC(disable_rewinds, "SOF HDA disable rewinds");
u32 hda_dsp_get_mult_div(struct snd_sof_dev *sdev, int rate)
{
switch (rate) {
case 8000:
return SDnFMT_DIV(6);
case 9600:
return SDnFMT_DIV(5);
case 11025:
return SDnFMT_BASE(1) | SDnFMT_DIV(4);
case 16000:
return SDnFMT_DIV(3);
case 22050:
return SDnFMT_BASE(1) | SDnFMT_DIV(2);
case 32000:
return SDnFMT_DIV(3) | SDnFMT_MULT(2);
case 44100:
return SDnFMT_BASE(1);
case 48000:
return 0;
case 88200:
return SDnFMT_BASE(1) | SDnFMT_MULT(2);
case 96000:
return SDnFMT_MULT(2);
case 176400:
return SDnFMT_BASE(1) | SDnFMT_MULT(4);
case 192000:
return SDnFMT_MULT(4);
default:
dev_warn(sdev->dev, "can't find div rate %d using 48kHz\n",
rate);
return 0; /* use 48KHz if not found */
}
};
u32 hda_dsp_get_bits(struct snd_sof_dev *sdev, int sample_bits)
{
switch (sample_bits) {
case 8:
return SDnFMT_BITS(0);
case 16:
return SDnFMT_BITS(1);
case 20:
return SDnFMT_BITS(2);
case 24:
return SDnFMT_BITS(3);
case 32:
return SDnFMT_BITS(4);
default:
dev_warn(sdev->dev, "can't find %d bits using 16bit\n",
sample_bits);
return SDnFMT_BITS(1); /* use 16bits format if not found */
}
};
int hda_dsp_pcm_hw_params(struct snd_sof_dev *sdev,
struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_sof_platform_stream_params *platform_params)
{
struct hdac_stream *hstream = substream->runtime->private_data;
struct hdac_ext_stream *hext_stream = stream_to_hdac_ext_stream(hstream);
struct sof_intel_hda_dev *hda = sdev->pdata->hw_pdata;
struct snd_dma_buffer *dmab;
int ret;
hstream->substream = substream;
dmab = substream->runtime->dma_buffer_p;
/*
* Use the codec required format val (which is link_bps adjusted) when
* the DSP is not in use
*/
if (!sdev->dspless_mode_selected) {
u32 rate = hda_dsp_get_mult_div(sdev, params_rate(params));
u32 bits = hda_dsp_get_bits(sdev, params_width(params));
hstream->format_val = rate | bits | (params_channels(params) - 1);
}
hstream->bufsize = params_buffer_bytes(params);
hstream->period_bytes = params_period_bytes(params);
hstream->no_period_wakeup =
(params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) &&
(params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP);
ret = hda_dsp_stream_hw_params(sdev, hext_stream, dmab, params);
if (ret < 0) {
dev_err(sdev->dev, "error: hdac prepare failed: %d\n", ret);
return ret;
}
/* enable SPIB when rewinds are disabled */
if (hda_disable_rewinds)
hda_dsp_stream_spib_config(sdev, hext_stream, HDA_DSP_SPIB_ENABLE, 0);
else
hda_dsp_stream_spib_config(sdev, hext_stream, HDA_DSP_SPIB_DISABLE, 0);
if (hda)
platform_params->no_ipc_position = hda->no_ipc_position;
platform_params->stream_tag = hstream->stream_tag;
return 0;
}
EXPORT_SYMBOL_NS(hda_dsp_pcm_hw_params, SND_SOC_SOF_INTEL_HDA_COMMON);
/* update SPIB register with appl position */
int hda_dsp_pcm_ack(struct snd_sof_dev *sdev, struct snd_pcm_substream *substream)
{
struct hdac_stream *hstream = substream->runtime->private_data;
struct snd_pcm_runtime *runtime = substream->runtime;
ssize_t appl_pos, buf_size;
u32 spib;
appl_pos = frames_to_bytes(runtime, runtime->control->appl_ptr);
buf_size = frames_to_bytes(runtime, runtime->buffer_size);
spib = appl_pos % buf_size;
/* Allowable value for SPIB is 1 byte to max buffer size */
if (!spib)
spib = buf_size;
sof_io_write(sdev, hstream->spib_addr, spib);
return 0;
}
EXPORT_SYMBOL_NS(hda_dsp_pcm_ack, SND_SOC_SOF_INTEL_HDA_COMMON);
int hda_dsp_pcm_trigger(struct snd_sof_dev *sdev,
struct snd_pcm_substream *substream, int cmd)
{
struct hdac_stream *hstream = substream->runtime->private_data;
struct hdac_ext_stream *hext_stream = stream_to_hdac_ext_stream(hstream);
return hda_dsp_stream_trigger(sdev, hext_stream, cmd);
}
EXPORT_SYMBOL_NS(hda_dsp_pcm_trigger, SND_SOC_SOF_INTEL_HDA_COMMON);
snd_pcm_uframes_t hda_dsp_pcm_pointer(struct snd_sof_dev *sdev,
struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
struct snd_soc_component *scomp = sdev->component;
struct hdac_stream *hstream = substream->runtime->private_data;
struct sof_intel_hda_dev *hda = sdev->pdata->hw_pdata;
struct snd_sof_pcm *spcm;
snd_pcm_uframes_t pos;
spcm = snd_sof_find_spcm_dai(scomp, rtd);
if (!spcm) {
dev_warn_ratelimited(sdev->dev, "warn: can't find PCM with DAI ID %d\n",
rtd->dai_link->id);
return 0;
}
if (hda && !hda->no_ipc_position) {
/* read position from IPC position */
pos = spcm->stream[substream->stream].posn.host_posn;
goto found;
}
pos = hda_dsp_stream_get_position(hstream, substream->stream, true);
found:
pos = bytes_to_frames(substream->runtime, pos);
trace_sof_intel_hda_dsp_pcm(sdev, hstream, substream, pos);
return pos;
}
EXPORT_SYMBOL_NS(hda_dsp_pcm_pointer, SND_SOC_SOF_INTEL_HDA_COMMON);
int hda_dsp_pcm_open(struct snd_sof_dev *sdev,
struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
struct snd_pcm_runtime *runtime = substream->runtime;
struct snd_soc_component *scomp = sdev->component;
struct hdac_ext_stream *dsp_stream;
struct snd_sof_pcm *spcm;
int direction = substream->stream;
u32 flags = 0;
spcm = snd_sof_find_spcm_dai(scomp, rtd);
if (!spcm) {
dev_err(sdev->dev, "error: can't find PCM with DAI ID %d\n", rtd->dai_link->id);
return -EINVAL;
}
/*
* if we want the .ack to work, we need to prevent the control from being mapped.
* The status can still be mapped.
*/
if (hda_disable_rewinds)
runtime->hw.info |= SNDRV_PCM_INFO_NO_REWINDS | SNDRV_PCM_INFO_SYNC_APPLPTR;
/*
* All playback streams are DMI L1 capable, capture streams need
* pause push/release to be disabled
*/
if (hda_always_enable_dmi_l1 && direction == SNDRV_PCM_STREAM_CAPTURE)
runtime->hw.info &= ~SNDRV_PCM_INFO_PAUSE;
if (hda_always_enable_dmi_l1 ||
direction == SNDRV_PCM_STREAM_PLAYBACK ||
spcm->stream[substream->stream].d0i3_compatible)
flags |= SOF_HDA_STREAM_DMI_L1_COMPATIBLE;
dsp_stream = hda_dsp_stream_get(sdev, direction, flags);
if (!dsp_stream) {
dev_err(sdev->dev, "error: no stream available\n");
return -ENODEV;
}
/* minimum as per HDA spec */
snd_pcm_hw_constraint_step(substream->runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 4);
/* avoid circular buffer wrap in middle of period */
snd_pcm_hw_constraint_integer(substream->runtime,
SNDRV_PCM_HW_PARAM_PERIODS);
/* Limit the maximum number of periods to not exceed the BDL entries count */
if (runtime->hw.periods_max > HDA_DSP_MAX_BDL_ENTRIES)
snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
runtime->hw.periods_min,
HDA_DSP_MAX_BDL_ENTRIES);
/* Only S16 and S32 supported by HDA hardware when used without DSP */
if (sdev->dspless_mode_selected)
snd_pcm_hw_constraint_mask64(substream->runtime, SNDRV_PCM_HW_PARAM_FORMAT,
SNDRV_PCM_FMTBIT_S16 | SNDRV_PCM_FMTBIT_S32);
/*
* The dsp_max_burst_size_in_ms is the length of the maximum burst size
* of the host DMA in the ALSA buffer.
*
* On playback start the DMA will transfer dsp_max_burst_size_in_ms
* amount of data in one initial burst to fill up the host DMA buffer.
* Consequent DMA burst sizes are shorter and their length can vary.
* To make sure that userspace allocate large enough ALSA buffer we need
* to place a constraint on the buffer time.
*
* On capture the DMA will transfer 1ms chunks.
*
* Exact dsp_max_burst_size_in_ms constraint is racy, so set the
* constraint to a minimum of 2x dsp_max_burst_size_in_ms.
*/
if (spcm->stream[direction].dsp_max_burst_size_in_ms)
snd_pcm_hw_constraint_minmax(substream->runtime,
SNDRV_PCM_HW_PARAM_BUFFER_TIME,
spcm->stream[direction].dsp_max_burst_size_in_ms * USEC_PER_MSEC * 2,
UINT_MAX);
/* binding pcm substream to hda stream */
substream->runtime->private_data = &dsp_stream->hstream;
/*
* Reset the llp cache values (they are used for LLP compensation in
* case the counter is not reset)
*/
dsp_stream->pplcllpl = 0;
dsp_stream->pplcllpu = 0;
return 0;
}
EXPORT_SYMBOL_NS(hda_dsp_pcm_open, SND_SOC_SOF_INTEL_HDA_COMMON);
int hda_dsp_pcm_close(struct snd_sof_dev *sdev,
struct snd_pcm_substream *substream)
{
struct hdac_stream *hstream = substream->runtime->private_data;
int direction = substream->stream;
int ret;
ret = hda_dsp_stream_put(sdev, direction, hstream->stream_tag);
if (ret) {
dev_dbg(sdev->dev, "stream %s not opened!\n", substream->name);
return -ENODEV;
}
/* unbinding pcm substream to hda stream */
substream->runtime->private_data = NULL;
return 0;
}
EXPORT_SYMBOL_NS(hda_dsp_pcm_close, SND_SOC_SOF_INTEL_HDA_COMMON);
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