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https://github.com/torvalds/linux
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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>
129 lines
2.9 KiB
C
129 lines
2.9 KiB
C
/*
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* linux/sound/arm/pxa2xx-pcm.c -- ALSA PCM interface for the Intel PXA2xx chip
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*
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* Author: Nicolas Pitre
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* Created: Nov 30, 2004
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* Copyright: (C) 2004 MontaVista Software, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/module.h>
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#include <linux/dma-mapping.h>
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#include <linux/dmaengine.h>
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#include <mach/dma.h>
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#include <sound/core.h>
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#include <sound/pxa2xx-lib.h>
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#include <sound/dmaengine_pcm.h>
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#include "pxa2xx-pcm.h"
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static int pxa2xx_pcm_prepare(struct snd_pcm_substream *substream)
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{
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struct pxa2xx_pcm_client *client = substream->private_data;
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__pxa2xx_pcm_prepare(substream);
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return client->prepare(substream);
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}
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static int pxa2xx_pcm_open(struct snd_pcm_substream *substream)
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{
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struct pxa2xx_pcm_client *client = substream->private_data;
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct pxa2xx_runtime_data *rtd;
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int ret;
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ret = __pxa2xx_pcm_open(substream);
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if (ret)
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goto out;
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rtd = runtime->private_data;
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rtd->params = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
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client->playback_params : client->capture_params;
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ret = client->startup(substream);
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if (!ret)
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goto err2;
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return 0;
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err2:
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__pxa2xx_pcm_close(substream);
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out:
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return ret;
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}
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static int pxa2xx_pcm_close(struct snd_pcm_substream *substream)
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{
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struct pxa2xx_pcm_client *client = substream->private_data;
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client->shutdown(substream);
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return __pxa2xx_pcm_close(substream);
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}
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static struct snd_pcm_ops pxa2xx_pcm_ops = {
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.open = pxa2xx_pcm_open,
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.close = pxa2xx_pcm_close,
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.ioctl = snd_pcm_lib_ioctl,
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.hw_params = __pxa2xx_pcm_hw_params,
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.hw_free = __pxa2xx_pcm_hw_free,
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.prepare = pxa2xx_pcm_prepare,
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.trigger = pxa2xx_pcm_trigger,
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.pointer = pxa2xx_pcm_pointer,
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.mmap = pxa2xx_pcm_mmap,
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};
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int pxa2xx_pcm_new(struct snd_card *card, struct pxa2xx_pcm_client *client,
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struct snd_pcm **rpcm)
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{
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struct snd_pcm *pcm;
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int play = client->playback_params ? 1 : 0;
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int capt = client->capture_params ? 1 : 0;
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int ret;
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ret = snd_pcm_new(card, "PXA2xx-PCM", 0, play, capt, &pcm);
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if (ret)
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goto out;
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pcm->private_data = client;
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pcm->private_free = pxa2xx_pcm_free_dma_buffers;
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ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
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if (ret)
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goto out;
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if (play) {
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int stream = SNDRV_PCM_STREAM_PLAYBACK;
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snd_pcm_set_ops(pcm, stream, &pxa2xx_pcm_ops);
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ret = pxa2xx_pcm_preallocate_dma_buffer(pcm, stream);
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if (ret)
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goto out;
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}
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if (capt) {
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int stream = SNDRV_PCM_STREAM_CAPTURE;
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snd_pcm_set_ops(pcm, stream, &pxa2xx_pcm_ops);
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ret = pxa2xx_pcm_preallocate_dma_buffer(pcm, stream);
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if (ret)
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goto out;
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}
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if (rpcm)
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*rpcm = pcm;
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ret = 0;
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out:
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return ret;
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}
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EXPORT_SYMBOL(pxa2xx_pcm_new);
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MODULE_AUTHOR("Nicolas Pitre");
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MODULE_DESCRIPTION("Intel PXA2xx PCM DMA module");
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MODULE_LICENSE("GPL");
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