mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-24 13:13:57 +08:00
a92b53179d
The same constraint is going to be set in the snd_dmaengine_pcm_open() function, so there is no need to set it here as well. Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com> Reviewed-by: Jarkko Nikula <jarkko.nikula@bitmer.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
325 lines
8.0 KiB
C
325 lines
8.0 KiB
C
/*
|
|
* omap-pcm.c -- ALSA PCM interface for the OMAP SoC
|
|
*
|
|
* Copyright (C) 2008 Nokia Corporation
|
|
*
|
|
* Contact: Jarkko Nikula <jarkko.nikula@bitmer.com>
|
|
* Peter Ujfalusi <peter.ujfalusi@ti.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* version 2 as published by the Free Software Foundation.
|
|
*
|
|
* 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.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
|
|
* 02110-1301 USA
|
|
*
|
|
*/
|
|
|
|
#include <linux/dma-mapping.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/module.h>
|
|
#include <linux/omap-dma.h>
|
|
#include <sound/core.h>
|
|
#include <sound/pcm.h>
|
|
#include <sound/pcm_params.h>
|
|
#include <sound/dmaengine_pcm.h>
|
|
#include <sound/soc.h>
|
|
|
|
#include "omap-pcm.h"
|
|
|
|
#ifdef CONFIG_ARCH_OMAP1
|
|
#define pcm_omap1510() cpu_is_omap1510()
|
|
#else
|
|
#define pcm_omap1510() 0
|
|
#endif
|
|
|
|
static const struct snd_pcm_hardware omap_pcm_hardware = {
|
|
.info = SNDRV_PCM_INFO_MMAP |
|
|
SNDRV_PCM_INFO_MMAP_VALID |
|
|
SNDRV_PCM_INFO_INTERLEAVED |
|
|
SNDRV_PCM_INFO_PAUSE |
|
|
SNDRV_PCM_INFO_RESUME |
|
|
SNDRV_PCM_INFO_NO_PERIOD_WAKEUP,
|
|
.formats = SNDRV_PCM_FMTBIT_S16_LE |
|
|
SNDRV_PCM_FMTBIT_S32_LE,
|
|
.period_bytes_min = 32,
|
|
.period_bytes_max = 64 * 1024,
|
|
.periods_min = 2,
|
|
.periods_max = 255,
|
|
.buffer_bytes_max = 128 * 1024,
|
|
};
|
|
|
|
static int omap_pcm_get_dma_buswidth(int num_bits)
|
|
{
|
|
int buswidth;
|
|
|
|
switch (num_bits) {
|
|
case 16:
|
|
buswidth = DMA_SLAVE_BUSWIDTH_2_BYTES;
|
|
break;
|
|
case 32:
|
|
buswidth = DMA_SLAVE_BUSWIDTH_4_BYTES;
|
|
break;
|
|
default:
|
|
buswidth = -EINVAL;
|
|
break;
|
|
}
|
|
return buswidth;
|
|
}
|
|
|
|
|
|
/* this may get called several times by oss emulation */
|
|
static int omap_pcm_hw_params(struct snd_pcm_substream *substream,
|
|
struct snd_pcm_hw_params *params)
|
|
{
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
struct snd_soc_pcm_runtime *rtd = substream->private_data;
|
|
struct omap_pcm_dma_data *dma_data;
|
|
struct dma_slave_config config;
|
|
struct dma_chan *chan;
|
|
int err = 0;
|
|
|
|
dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
|
|
|
|
/* return if this is a bufferless transfer e.g.
|
|
* codec <--> BT codec or GSM modem -- lg FIXME */
|
|
if (!dma_data)
|
|
return 0;
|
|
|
|
snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
|
|
runtime->dma_bytes = params_buffer_bytes(params);
|
|
|
|
chan = snd_dmaengine_pcm_get_chan(substream);
|
|
if (!chan)
|
|
return -EINVAL;
|
|
|
|
/* fills in addr_width and direction */
|
|
err = snd_hwparams_to_dma_slave_config(substream, params, &config);
|
|
if (err)
|
|
return err;
|
|
|
|
/* Override the *_dma addr_width if requested by the DAI driver */
|
|
if (dma_data->data_type) {
|
|
int buswidth = omap_pcm_get_dma_buswidth(dma_data->data_type);
|
|
|
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
|
|
config.dst_addr_width = buswidth;
|
|
else
|
|
config.src_addr_width = buswidth;
|
|
}
|
|
|
|
config.src_addr = dma_data->port_addr;
|
|
config.dst_addr = dma_data->port_addr;
|
|
config.src_maxburst = dma_data->packet_size;
|
|
config.dst_maxburst = dma_data->packet_size;
|
|
|
|
return dmaengine_slave_config(chan, &config);
|
|
}
|
|
|
|
static int omap_pcm_hw_free(struct snd_pcm_substream *substream)
|
|
{
|
|
snd_pcm_set_runtime_buffer(substream, NULL);
|
|
return 0;
|
|
}
|
|
|
|
static int omap_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
|
|
{
|
|
struct snd_soc_pcm_runtime *rtd = substream->private_data;
|
|
struct omap_pcm_dma_data *dma_data;
|
|
int ret = 0;
|
|
|
|
dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
|
|
|
|
switch (cmd) {
|
|
case SNDRV_PCM_TRIGGER_START:
|
|
case SNDRV_PCM_TRIGGER_RESUME:
|
|
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
|
|
/* Configure McBSP internal buffer usage */
|
|
if (dma_data->set_threshold)
|
|
dma_data->set_threshold(substream);
|
|
break;
|
|
|
|
case SNDRV_PCM_TRIGGER_STOP:
|
|
case SNDRV_PCM_TRIGGER_SUSPEND:
|
|
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
|
|
break;
|
|
default:
|
|
ret = -EINVAL;
|
|
}
|
|
|
|
if (ret == 0)
|
|
ret = snd_dmaengine_pcm_trigger(substream, cmd);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static snd_pcm_uframes_t omap_pcm_pointer(struct snd_pcm_substream *substream)
|
|
{
|
|
snd_pcm_uframes_t offset;
|
|
|
|
if (pcm_omap1510())
|
|
offset = snd_dmaengine_pcm_pointer_no_residue(substream);
|
|
else
|
|
offset = snd_dmaengine_pcm_pointer(substream);
|
|
|
|
return offset;
|
|
}
|
|
|
|
static int omap_pcm_open(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_soc_pcm_runtime *rtd = substream->private_data;
|
|
struct omap_pcm_dma_data *dma_data;
|
|
|
|
snd_soc_set_runtime_hwparams(substream, &omap_pcm_hardware);
|
|
|
|
dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
|
|
|
|
return snd_dmaengine_pcm_open(substream, omap_dma_filter_fn,
|
|
&dma_data->dma_req);
|
|
}
|
|
|
|
static int omap_pcm_close(struct snd_pcm_substream *substream)
|
|
{
|
|
snd_dmaengine_pcm_close(substream);
|
|
return 0;
|
|
}
|
|
|
|
static int omap_pcm_mmap(struct snd_pcm_substream *substream,
|
|
struct vm_area_struct *vma)
|
|
{
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
|
|
return dma_mmap_writecombine(substream->pcm->card->dev, vma,
|
|
runtime->dma_area,
|
|
runtime->dma_addr,
|
|
runtime->dma_bytes);
|
|
}
|
|
|
|
static struct snd_pcm_ops omap_pcm_ops = {
|
|
.open = omap_pcm_open,
|
|
.close = omap_pcm_close,
|
|
.ioctl = snd_pcm_lib_ioctl,
|
|
.hw_params = omap_pcm_hw_params,
|
|
.hw_free = omap_pcm_hw_free,
|
|
.trigger = omap_pcm_trigger,
|
|
.pointer = omap_pcm_pointer,
|
|
.mmap = omap_pcm_mmap,
|
|
};
|
|
|
|
static u64 omap_pcm_dmamask = DMA_BIT_MASK(64);
|
|
|
|
static int omap_pcm_preallocate_dma_buffer(struct snd_pcm *pcm,
|
|
int stream)
|
|
{
|
|
struct snd_pcm_substream *substream = pcm->streams[stream].substream;
|
|
struct snd_dma_buffer *buf = &substream->dma_buffer;
|
|
size_t size = omap_pcm_hardware.buffer_bytes_max;
|
|
|
|
buf->dev.type = SNDRV_DMA_TYPE_DEV;
|
|
buf->dev.dev = pcm->card->dev;
|
|
buf->private_data = NULL;
|
|
buf->area = dma_alloc_writecombine(pcm->card->dev, size,
|
|
&buf->addr, GFP_KERNEL);
|
|
if (!buf->area)
|
|
return -ENOMEM;
|
|
|
|
buf->bytes = size;
|
|
return 0;
|
|
}
|
|
|
|
static void omap_pcm_free_dma_buffers(struct snd_pcm *pcm)
|
|
{
|
|
struct snd_pcm_substream *substream;
|
|
struct snd_dma_buffer *buf;
|
|
int stream;
|
|
|
|
for (stream = 0; stream < 2; stream++) {
|
|
substream = pcm->streams[stream].substream;
|
|
if (!substream)
|
|
continue;
|
|
|
|
buf = &substream->dma_buffer;
|
|
if (!buf->area)
|
|
continue;
|
|
|
|
dma_free_writecombine(pcm->card->dev, buf->bytes,
|
|
buf->area, buf->addr);
|
|
buf->area = NULL;
|
|
}
|
|
}
|
|
|
|
static int omap_pcm_new(struct snd_soc_pcm_runtime *rtd)
|
|
{
|
|
struct snd_card *card = rtd->card->snd_card;
|
|
struct snd_pcm *pcm = rtd->pcm;
|
|
int ret = 0;
|
|
|
|
if (!card->dev->dma_mask)
|
|
card->dev->dma_mask = &omap_pcm_dmamask;
|
|
if (!card->dev->coherent_dma_mask)
|
|
card->dev->coherent_dma_mask = DMA_BIT_MASK(64);
|
|
|
|
if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
|
|
ret = omap_pcm_preallocate_dma_buffer(pcm,
|
|
SNDRV_PCM_STREAM_PLAYBACK);
|
|
if (ret)
|
|
goto out;
|
|
}
|
|
|
|
if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
|
|
ret = omap_pcm_preallocate_dma_buffer(pcm,
|
|
SNDRV_PCM_STREAM_CAPTURE);
|
|
if (ret)
|
|
goto out;
|
|
}
|
|
|
|
out:
|
|
/* free preallocated buffers in case of error */
|
|
if (ret)
|
|
omap_pcm_free_dma_buffers(pcm);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static struct snd_soc_platform_driver omap_soc_platform = {
|
|
.ops = &omap_pcm_ops,
|
|
.pcm_new = omap_pcm_new,
|
|
.pcm_free = omap_pcm_free_dma_buffers,
|
|
};
|
|
|
|
static int omap_pcm_probe(struct platform_device *pdev)
|
|
{
|
|
return snd_soc_register_platform(&pdev->dev,
|
|
&omap_soc_platform);
|
|
}
|
|
|
|
static int omap_pcm_remove(struct platform_device *pdev)
|
|
{
|
|
snd_soc_unregister_platform(&pdev->dev);
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver omap_pcm_driver = {
|
|
.driver = {
|
|
.name = "omap-pcm-audio",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
|
|
.probe = omap_pcm_probe,
|
|
.remove = omap_pcm_remove,
|
|
};
|
|
|
|
module_platform_driver(omap_pcm_driver);
|
|
|
|
MODULE_AUTHOR("Jarkko Nikula <jarkko.nikula@bitmer.com>");
|
|
MODULE_DESCRIPTION("OMAP PCM DMA module");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:omap-pcm-audio");
|