mirror of
https://github.com/torvalds/linux
synced 2024-11-05 18:23:50 +00:00
28f054802a
snd_pcm_ops are not supposed to change at runtime. All functions working with snd_pcm_ops provided by <sound/pcm.h> work with const snd_pcm_ops. So mark the non-const structs as const. Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
129 lines
2.9 KiB
C
129 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/module.h>
|
|
#include <linux/dma-mapping.h>
|
|
#include <linux/dmaengine.h>
|
|
|
|
#include <mach/dma.h>
|
|
|
|
#include <sound/core.h>
|
|
#include <sound/pxa2xx-lib.h>
|
|
#include <sound/dmaengine_pcm.h>
|
|
|
|
#include "pxa2xx-pcm.h"
|
|
|
|
static int pxa2xx_pcm_prepare(struct snd_pcm_substream *substream)
|
|
{
|
|
struct pxa2xx_pcm_client *client = substream->private_data;
|
|
|
|
__pxa2xx_pcm_prepare(substream);
|
|
|
|
return client->prepare(substream);
|
|
}
|
|
|
|
static int pxa2xx_pcm_open(struct snd_pcm_substream *substream)
|
|
{
|
|
struct pxa2xx_pcm_client *client = substream->private_data;
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
struct pxa2xx_runtime_data *rtd;
|
|
int ret;
|
|
|
|
ret = __pxa2xx_pcm_open(substream);
|
|
if (ret)
|
|
goto out;
|
|
|
|
rtd = runtime->private_data;
|
|
|
|
rtd->params = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
|
|
client->playback_params : client->capture_params;
|
|
|
|
ret = client->startup(substream);
|
|
if (!ret)
|
|
goto err2;
|
|
|
|
return 0;
|
|
|
|
err2:
|
|
__pxa2xx_pcm_close(substream);
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static int pxa2xx_pcm_close(struct snd_pcm_substream *substream)
|
|
{
|
|
struct pxa2xx_pcm_client *client = substream->private_data;
|
|
|
|
client->shutdown(substream);
|
|
|
|
return __pxa2xx_pcm_close(substream);
|
|
}
|
|
|
|
static const 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,
|
|
};
|
|
|
|
int pxa2xx_pcm_new(struct snd_card *card, struct pxa2xx_pcm_client *client,
|
|
struct snd_pcm **rpcm)
|
|
{
|
|
struct snd_pcm *pcm;
|
|
int play = client->playback_params ? 1 : 0;
|
|
int capt = client->capture_params ? 1 : 0;
|
|
int ret;
|
|
|
|
ret = snd_pcm_new(card, "PXA2xx-PCM", 0, play, capt, &pcm);
|
|
if (ret)
|
|
goto out;
|
|
|
|
pcm->private_data = client;
|
|
pcm->private_free = pxa2xx_pcm_free_dma_buffers;
|
|
|
|
ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
|
|
if (ret)
|
|
goto out;
|
|
|
|
if (play) {
|
|
int stream = SNDRV_PCM_STREAM_PLAYBACK;
|
|
snd_pcm_set_ops(pcm, stream, &pxa2xx_pcm_ops);
|
|
ret = pxa2xx_pcm_preallocate_dma_buffer(pcm, stream);
|
|
if (ret)
|
|
goto out;
|
|
}
|
|
if (capt) {
|
|
int stream = SNDRV_PCM_STREAM_CAPTURE;
|
|
snd_pcm_set_ops(pcm, stream, &pxa2xx_pcm_ops);
|
|
ret = pxa2xx_pcm_preallocate_dma_buffer(pcm, stream);
|
|
if (ret)
|
|
goto out;
|
|
}
|
|
|
|
if (rpcm)
|
|
*rpcm = pcm;
|
|
ret = 0;
|
|
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
EXPORT_SYMBOL(pxa2xx_pcm_new);
|
|
|
|
MODULE_AUTHOR("Nicolas Pitre");
|
|
MODULE_DESCRIPTION("Intel PXA2xx PCM DMA module");
|
|
MODULE_LICENSE("GPL");
|