forked from luck/tmp_suning_uos_patched
d7711dc593
Currently the ep93xx DMA code is one of the few users relying on the fact that the compat code uses the dma_data as the filter data for non-DT channel requests. Since the rest of the core expects this to be a struct snd_dmaengine_dai_data this isn't terribly helpful this will be changed to use the already existing filter data so avoid breaking ep93xx by open coding the current behaviour. Signed-off-by: Mark Brown <broonie@linaro.org> Acked-by: Lars-Peter Clausen <lars@metafoo.de>
110 lines
2.8 KiB
C
110 lines
2.8 KiB
C
/*
|
|
* linux/sound/arm/ep93xx-pcm.c - EP93xx ALSA PCM interface
|
|
*
|
|
* Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
|
|
* Copyright (C) 2006 Applied Data Systems
|
|
*
|
|
* Rewritten for the SoC audio subsystem (Based on PXA2xx code):
|
|
* Copyright (c) 2008 Ryan Mallon
|
|
*
|
|
* 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/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/dmaengine.h>
|
|
|
|
#include <sound/pcm.h>
|
|
#include <sound/soc.h>
|
|
#include <sound/dmaengine_pcm.h>
|
|
|
|
#include <linux/platform_data/dma-ep93xx.h>
|
|
|
|
static const struct snd_pcm_hardware ep93xx_pcm_hardware = {
|
|
.info = (SNDRV_PCM_INFO_MMAP |
|
|
SNDRV_PCM_INFO_MMAP_VALID |
|
|
SNDRV_PCM_INFO_INTERLEAVED |
|
|
SNDRV_PCM_INFO_BLOCK_TRANSFER),
|
|
|
|
.rates = SNDRV_PCM_RATE_8000_192000,
|
|
.rate_min = SNDRV_PCM_RATE_8000,
|
|
.rate_max = SNDRV_PCM_RATE_192000,
|
|
|
|
.formats = (SNDRV_PCM_FMTBIT_S16_LE |
|
|
SNDRV_PCM_FMTBIT_S24_LE |
|
|
SNDRV_PCM_FMTBIT_S32_LE),
|
|
|
|
.buffer_bytes_max = 131072,
|
|
.period_bytes_min = 32,
|
|
.period_bytes_max = 32768,
|
|
.periods_min = 1,
|
|
.periods_max = 32,
|
|
.fifo_size = 32,
|
|
};
|
|
|
|
static bool ep93xx_pcm_dma_filter(struct dma_chan *chan, void *filter_param)
|
|
{
|
|
struct ep93xx_dma_data *data = filter_param;
|
|
|
|
if (data->direction == ep93xx_dma_chan_direction(chan)) {
|
|
chan->private = data;
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
static struct dma_chan *ep93xx_compat_request_channel(
|
|
struct snd_soc_pcm_runtime *rtd,
|
|
struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_dmaengine_dai_dma_data *dma_data;
|
|
|
|
dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
|
|
|
|
return snd_dmaengine_pcm_request_channel(ep93xx_pcm_dma_filter,
|
|
dma_data);
|
|
}
|
|
|
|
static const struct snd_dmaengine_pcm_config ep93xx_dmaengine_pcm_config = {
|
|
.pcm_hardware = &ep93xx_pcm_hardware,
|
|
.compat_filter_fn = ep93xx_pcm_dma_filter,
|
|
.compat_request_channel = ep93xx_compat_request_channel,
|
|
.prealloc_buffer_size = 131072,
|
|
};
|
|
|
|
static int ep93xx_soc_platform_probe(struct platform_device *pdev)
|
|
{
|
|
return snd_dmaengine_pcm_register(&pdev->dev,
|
|
&ep93xx_dmaengine_pcm_config,
|
|
SND_DMAENGINE_PCM_FLAG_NO_RESIDUE |
|
|
SND_DMAENGINE_PCM_FLAG_NO_DT |
|
|
SND_DMAENGINE_PCM_FLAG_COMPAT);
|
|
}
|
|
|
|
static int ep93xx_soc_platform_remove(struct platform_device *pdev)
|
|
{
|
|
snd_dmaengine_pcm_unregister(&pdev->dev);
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver ep93xx_pcm_driver = {
|
|
.driver = {
|
|
.name = "ep93xx-pcm-audio",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
|
|
.probe = ep93xx_soc_platform_probe,
|
|
.remove = ep93xx_soc_platform_remove,
|
|
};
|
|
|
|
module_platform_driver(ep93xx_pcm_driver);
|
|
|
|
MODULE_AUTHOR("Ryan Mallon");
|
|
MODULE_DESCRIPTION("EP93xx ALSA PCM interface");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:ep93xx-pcm-audio");
|