mirror of
https://github.com/torvalds/linux.git
synced 2024-12-11 05:33:09 +00:00
58ceb57ec1
This patch removes the old PXA DMA API usage and switches over to generic functions provided by snd-soc-dmaengine-pcm. More cleanups may be done on top of this, and some function stubs can now be removed completetly. However, the intention here was to keep the transition as small as possible. This was tested on the mioa701 pxa27x board. Signed-off-by: Daniel Mack <zonque@gmail.com> [trivial change from mmp-dma to pxa-dma] Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Signed-off-by: Mark Brown <broonie@kernel.org>
120 lines
2.9 KiB
C
120 lines
2.9 KiB
C
/*
|
|
* linux/sound/arm/pxa2xx-pcm.c -- ALSA PCM interface for the Intel PXA2xx chip
|
|
*
|
|
* Author: Nicolas Pitre
|
|
* Created: Nov 30, 2004
|
|
* Copyright: (C) 2004 MontaVista Software, Inc.
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#include <linux/dma-mapping.h>
|
|
#include <linux/module.h>
|
|
#include <linux/dmaengine.h>
|
|
#include <linux/of.h>
|
|
|
|
#include <sound/core.h>
|
|
#include <sound/soc.h>
|
|
#include <sound/pxa2xx-lib.h>
|
|
#include <sound/dmaengine_pcm.h>
|
|
|
|
#include "../../arm/pxa2xx-pcm.h"
|
|
|
|
static int pxa2xx_pcm_hw_params(struct snd_pcm_substream *substream,
|
|
struct snd_pcm_hw_params *params)
|
|
{
|
|
struct snd_soc_pcm_runtime *rtd = substream->private_data;
|
|
struct snd_dmaengine_dai_dma_data *dma;
|
|
|
|
dma = 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)
|
|
return 0;
|
|
|
|
return __pxa2xx_pcm_hw_params(substream, params);
|
|
}
|
|
|
|
static int pxa2xx_pcm_hw_free(struct snd_pcm_substream *substream)
|
|
{
|
|
__pxa2xx_pcm_hw_free(substream);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct snd_pcm_ops pxa2xx_pcm_ops = {
|
|
.open = __pxa2xx_pcm_open,
|
|
.close = __pxa2xx_pcm_close,
|
|
.ioctl = snd_pcm_lib_ioctl,
|
|
.hw_params = pxa2xx_pcm_hw_params,
|
|
.hw_free = pxa2xx_pcm_hw_free,
|
|
.prepare = __pxa2xx_pcm_prepare,
|
|
.trigger = pxa2xx_pcm_trigger,
|
|
.pointer = pxa2xx_pcm_pointer,
|
|
.mmap = pxa2xx_pcm_mmap,
|
|
};
|
|
|
|
static int pxa2xx_soc_pcm_new(struct snd_soc_pcm_runtime *rtd)
|
|
{
|
|
struct snd_card *card = rtd->card->snd_card;
|
|
struct snd_pcm *pcm = rtd->pcm;
|
|
int ret;
|
|
|
|
ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
|
|
ret = pxa2xx_pcm_preallocate_dma_buffer(pcm,
|
|
SNDRV_PCM_STREAM_PLAYBACK);
|
|
if (ret)
|
|
goto out;
|
|
}
|
|
|
|
if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
|
|
ret = pxa2xx_pcm_preallocate_dma_buffer(pcm,
|
|
SNDRV_PCM_STREAM_CAPTURE);
|
|
if (ret)
|
|
goto out;
|
|
}
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static struct snd_soc_platform_driver pxa2xx_soc_platform = {
|
|
.ops = &pxa2xx_pcm_ops,
|
|
.pcm_new = pxa2xx_soc_pcm_new,
|
|
.pcm_free = pxa2xx_pcm_free_dma_buffers,
|
|
};
|
|
|
|
static int pxa2xx_soc_platform_probe(struct platform_device *pdev)
|
|
{
|
|
return devm_snd_soc_register_platform(&pdev->dev, &pxa2xx_soc_platform);
|
|
}
|
|
|
|
#ifdef CONFIG_OF
|
|
static const struct of_device_id snd_soc_pxa_audio_match[] = {
|
|
{ .compatible = "mrvl,pxa-pcm-audio" },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(of, snd_soc_pxa_audio_match);
|
|
#endif
|
|
|
|
static struct platform_driver pxa_pcm_driver = {
|
|
.driver = {
|
|
.name = "pxa-pcm-audio",
|
|
.of_match_table = of_match_ptr(snd_soc_pxa_audio_match),
|
|
},
|
|
|
|
.probe = pxa2xx_soc_platform_probe,
|
|
};
|
|
|
|
module_platform_driver(pxa_pcm_driver);
|
|
|
|
MODULE_AUTHOR("Nicolas Pitre");
|
|
MODULE_DESCRIPTION("Intel PXA2xx PCM DMA module");
|
|
MODULE_LICENSE("GPL");
|