linux/sound/soc/atmel/atmel-pcm-pdc.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * atmel-pcm.c  --  ALSA PCM interface for the Atmel atmel SoC.
 *
 *  Copyright (C) 2005 SAN People
 *  Copyright (C) 2008 Atmel
 *
 * Authors: Sedji Gaouaou <[email protected]>
 *
 * Based on at91-pcm. by:
 * Frank Mandarino <[email protected]>
 * Copyright 2006 Endrelia Technologies Inc.
 *
 * Based on pxa2xx-pcm.c by:
 *
 * Author:	Nicolas Pitre
 * Created:	Nov 30, 2004
 * Copyright:	(C) 2004 MontaVista Software, Inc.
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/dma-mapping.h>
#include <linux/atmel_pdc.h>
#include <linux/atmel-ssc.h>

#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>

#include "atmel-pcm.h"


static int atmel_pcm_new(struct snd_soc_component *component,
			 struct snd_soc_pcm_runtime *rtd)
{ … }

/*--------------------------------------------------------------------------*\
 * Hardware definition
\*--------------------------------------------------------------------------*/
/* TODO: These values were taken from the AT91 platform driver, check
 *	 them against real values for AT32
 */
static const struct snd_pcm_hardware atmel_pcm_hardware = …;


/*--------------------------------------------------------------------------*\
 * Data types
\*--------------------------------------------------------------------------*/
struct atmel_runtime_data { … };

/*--------------------------------------------------------------------------*\
 * ISR
\*--------------------------------------------------------------------------*/
static void atmel_pcm_dma_irq(u32 ssc_sr,
	struct snd_pcm_substream *substream)
{ … }


/*--------------------------------------------------------------------------*\
 * PCM operations
\*--------------------------------------------------------------------------*/
static int atmel_pcm_hw_params(struct snd_soc_component *component,
			       struct snd_pcm_substream *substream,
			       struct snd_pcm_hw_params *params)
{ … }

static int atmel_pcm_hw_free(struct snd_soc_component *component,
			     struct snd_pcm_substream *substream)
{ … }

static int atmel_pcm_prepare(struct snd_soc_component *component,
			     struct snd_pcm_substream *substream)
{ … }

static int atmel_pcm_trigger(struct snd_soc_component *component,
			     struct snd_pcm_substream *substream, int cmd)
{ … }

static snd_pcm_uframes_t atmel_pcm_pointer(struct snd_soc_component *component,
					   struct snd_pcm_substream *substream)
{ … }

static int atmel_pcm_open(struct snd_soc_component *component,
			  struct snd_pcm_substream *substream)
{ … }

static int atmel_pcm_close(struct snd_soc_component *component,
			   struct snd_pcm_substream *substream)
{ … }

static const struct snd_soc_component_driver atmel_soc_platform = …;

int atmel_pcm_pdc_platform_register(struct device *dev)
{ … }
EXPORT_SYMBOL(…);

MODULE_AUTHOR(…) …;
MODULE_DESCRIPTION(…) …;
MODULE_LICENSE(…) …;