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/*
* Copyright (c) 2019-2025 Allwinner Technology Co., Ltd. ALL rights reserved.
*
* Allwinner is a trademark of Allwinner Technology Co.,Ltd., registered in
* the the people's Republic of China and other countries.
* All Allwinner Technology Co.,Ltd. trademarks are used with permission.
*
* DISCLAIMER
* THIRD PARTY LICENCES MAY BE REQUIRED TO IMPLEMENT THE SOLUTION/PRODUCT.
* IF YOU NEED TO INTEGRATE THIRD PARTY’S TECHNOLOGY (SONY, DTS, DOLBY, AVS OR MPEGLA, ETC.)
* IN ALLWINNERS’SDK OR PRODUCTS, YOU SHALL BE SOLELY RESPONSIBLE TO OBTAIN
* ALL APPROPRIATELY REQUIRED THIRD PARTY LICENCES.
* ALLWINNER SHALL HAVE NO WARRANTY, INDEMNITY OR OTHER OBLIGATIONS WITH RESPECT TO MATTERS
* COVERED UNDER ANY REQUIRED THIRD PARTY LICENSE.
* YOU ARE SOLELY RESPONSIBLE FOR YOUR USAGE OF THIRD PARTY’S TECHNOLOGY.
*
*
* THIS SOFTWARE IS PROVIDED BY ALLWINNER"AS IS" AND TO THE MAXIMUM EXTENT
* PERMITTED BY LAW, ALLWINNER EXPRESSLY DISCLAIMS ALL WARRANTIES OF ANY KIND,
* WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING WITHOUT LIMITATION REGARDING
* THE TITLE, NON-INFRINGEMENT, ACCURACY, CONDITION, COMPLETENESS, PERFORMANCE
* OR MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
* IN NO EVENT SHALL ALLWINNER BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS, OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <stdio.h>
#include <sound/snd_core.h>
#include <sound/snd_pcm.h>
#include <sound/snd_dma.h>
#include <sound/dma_wrap.h>
#include "sunxi-pcm.h"
#ifndef sunxi_slave_id
#define sunxi_slave_id(d, s) (((d)<<16) | (s))
#endif
/* playback: period_size=2048*(16*2/8)=8K buffer_size=8K*8=64K */
/* capture: period_size=2048*(16*4/8)=16K buffer_size=16K*8=128K */
static const struct snd_pcm_hardware sunxi_pcm_hardware[2] = {
{ /* SNDRV_PCM_STREAM_PLAYBACK */
.info = SNDRV_PCM_INFO_INTERLEAVED
| SNDRV_PCM_INFO_BLOCK_TRANSFER
| SNDRV_PCM_INFO_MMAP
| SNDRV_PCM_INFO_MMAP_VALID
| SNDRV_PCM_INFO_PAUSE
| SNDRV_PCM_INFO_RESUME,
.buffer_bytes_max = 1024 * 128,
.period_bytes_min = 256,
.period_bytes_max = 1024 * 64,
.periods_min = 2,
.periods_max = 16,
},
{ /* SNDRV_PCM_STREAM_CAPTURE */
.info = SNDRV_PCM_INFO_INTERLEAVED
| SNDRV_PCM_INFO_BLOCK_TRANSFER
| SNDRV_PCM_INFO_MMAP
| SNDRV_PCM_INFO_MMAP_VALID
| SNDRV_PCM_INFO_PAUSE
| SNDRV_PCM_INFO_RESUME,
.buffer_bytes_max = 1024 * 128,
.period_bytes_min = 256,
.period_bytes_max = 1024 * 64,
.periods_min = 2,
.periods_max = 16,
},
};
static int sunxi_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, int stream)
{
const struct snd_pcm_hardware *hw = NULL;
struct snd_codec *codec = pcm->card->codec;
struct snd_dma_buffer *buf = &pcm->streams[stream]->dma_buffer;
size_t size = 0;
snd_print("prealloc dma buffer\n");
if (codec->hw)
hw = &codec->hw[stream];
else
hw = &sunxi_pcm_hardware[stream];
size = hw->buffer_bytes_max;
buf->addr = dma_alloc_coherent(size);
if (!buf->addr)
return -ENOMEM;
buf->bytes = size;
return 0;
}
int sunxi_pcm_new(struct snd_pcm *pcm)
{
int ret;
snd_print("\n");
if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK]) {
ret = sunxi_pcm_preallocate_dma_buffer(pcm,
SNDRV_PCM_STREAM_PLAYBACK);
if (ret != 0)
goto err;
}
if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE]) {
ret = sunxi_pcm_preallocate_dma_buffer(pcm,
SNDRV_PCM_STREAM_CAPTURE);
if (ret != 0)
goto err;
}
err:
return 0;
}
void sunxi_pcm_free(struct snd_pcm *pcm)
{
struct snd_pcm_substream *substream;
struct snd_dma_buffer *buf;
int stream;
snd_print("\n");
for (stream = 0; stream < 2; stream++) {
substream = pcm->streams[stream];
if (!substream)
continue;
buf = &substream->dma_buffer;
if (!buf->addr)
continue;
snd_print("dma free.\n");
dma_free_coherent(buf->addr);
buf->addr = NULL;
}
return ;
}
static int sunxi_pcm_open(struct snd_pcm_substream *substream)
{
int ret;
const struct snd_pcm_hardware *hw = NULL;
struct snd_codec *codec = substream->pcm->card->codec;
if (codec->hw)
hw = &codec->hw[substream->stream];
else
hw = &sunxi_pcm_hardware[substream->stream];
snd_set_runtime_hwparams(substream, hw);
snd_print("request dma channel\n");
/* request dma channel */
ret = snd_dmaengine_pcm_open_request_chan(substream);
if (ret != 0)
snd_err("dmaengine pcm open failed with err %d\n", ret);
return ret;
}
static int sunxi_pcm_close(struct snd_pcm_substream *substream)
{
snd_print("\n");
return snd_dmaengine_pcm_close_release_chan(substream);
}
static int sunxi_pcm_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
int ret;
struct snd_card *card = substream->pcm->card;
struct snd_dai *cpu_dai = card->platform->cpu_dai;
// struct dmaengine_pcm_runtime_data *prtd = substream->runtime->private_data;
struct dma_chan *chan = snd_dmaengine_pcm_get_chan(substream);
struct dma_slave_config slave_config = {0};
struct sunxi_dma_params *dmap;
#ifdef CONFIG_SND_PLATFORM_SUNXI_MAD
struct snd_platform *platform = cpu_dai->component;
unsigned int mad_bind = 0;
#endif
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
dmap = cpu_dai->playback_dma_data;
else
dmap = cpu_dai->capture_dma_data;
ret = snd_hwparams_to_dma_slave_config(substream, params, &slave_config);
if (ret != 0) {
snd_err("hw params config failed with err %d\n", ret);
return ret;
}
slave_config.dst_maxburst = dmap->dst_maxburst;
slave_config.src_maxburst = dmap->src_maxburst;
#ifdef CONFIG_SND_PLATFORM_SUNXI_MAD
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
if (!strncmp(card->name, "snddmic", 7)) {
struct sunxi_dmic_info *sunxi_dmic = platform->private_data;
mad_bind = sunxi_dmic->mad_priv.mad_bind;
} else if (!strncmp(card->name, "snddaudio0", 10)) {
struct sunxi_daudio_info *sunxi_daudio = platform->private_data;
mad_bind = sunxi_daudio->mad_priv.mad_bind;
}
printf(SNDRV_LOG_COLOR_BLUE "mad_bind[%s]: %s\n" SNDRV_LOG_COLOR_NONE,
card->name, mad_bind ? "On":"Off");
if (mad_bind == 1)
slave_config.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
}
#endif
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
slave_config.dst_addr = (unsigned long)dmap->dma_addr;
slave_config.src_addr_width = slave_config.dst_addr_width;
slave_config.slave_id = sunxi_slave_id(dmap->dma_drq_type_num, 0);
} else {
slave_config.src_addr = (unsigned long)dmap->dma_addr;
slave_config.dst_addr_width = slave_config.src_addr_width;
slave_config.slave_id = sunxi_slave_id(0,
dmap->dma_drq_type_num);
}
snd_info("src_addr:%p, dst_addr:%p, drq_type:%d\n",
slave_config.src_addr, slave_config.dst_addr,
dmap->dma_drq_type_num);
ret = dmaengine_slave_config(chan, &slave_config);
if (ret != 0) {
snd_err("dmaengine_slave_config failed with err %d\n", ret);
return ret;
}
snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
return 0;
}
static int sunxi_pcm_hw_free(struct snd_pcm_substream *substream)
{
snd_print("\n");
snd_pcm_set_runtime_buffer(substream, NULL);
return 0;
}
static int sunxi_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
{
snd_print(" stream:%u, cmd:%u\n", substream->stream, cmd);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
snd_dmaengine_pcm_trigger(substream,
SNDRV_PCM_TRIGGER_START);
break;
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
snd_dmaengine_pcm_trigger(substream,
SNDRV_PCM_TRIGGER_STOP);
break;
}
} else {
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
snd_dmaengine_pcm_trigger(substream,
SNDRV_PCM_TRIGGER_START);
break;
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
snd_dmaengine_pcm_trigger(substream,
SNDRV_PCM_TRIGGER_STOP);
break;
}
}
return 0;
}
struct snd_pcm_ops sunxi_pcm_ops = {
.open = sunxi_pcm_open,
.close = sunxi_pcm_close,
.hw_params = sunxi_pcm_hw_params,
.hw_free = sunxi_pcm_hw_free,
.trigger = sunxi_pcm_trigger,
.pointer = snd_dmaengine_pcm_pointer,
};
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