d65a14587a
Use snd_dmaengine_dai_dma_data for passing the dma parameters from clients to the pxa pcm lib. This does no functional change, it's just an intermedia step to migrate the pxa bits over to dmaengine. The calculation of dcmd is a transition hack which will be removed again in a later patch. It's just there to make the transition more readable. Signed-off-by: Daniel Mack <zonque@gmail.com> Acked-by: Mark Brown <broonie@linaro.org> Signed-off-by: Mark Brown <broonie@linaro.org>
136 lines
3.2 KiB
C
136 lines
3.2 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/dmaengine.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 = pxa_request_dma("dma", DMA_PRIO_LOW,
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pxa2xx_pcm_dma_irq, substream);
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if (ret < 0)
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goto err2;
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rtd->dma_ch = ret;
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ret = client->startup(substream);
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if (!ret)
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goto out;
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pxa_free_dma(rtd->dma_ch);
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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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struct pxa2xx_runtime_data *rtd = substream->runtime->private_data;
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pxa_free_dma(rtd->dma_ch);
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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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static u64 pxa2xx_pcm_dmamask = 0xffffffff;
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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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if (!card->dev->dma_mask)
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card->dev->dma_mask = &pxa2xx_pcm_dmamask;
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if (!card->dev->coherent_dma_mask)
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card->dev->coherent_dma_mask = 0xffffffff;
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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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