mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-16 14:56:43 +07:00
8af26493c0
We have devm_xxx version of snd_dmaengine_pcm_register, let's use it. This patch also removes related empty functions Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Reviewed-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com> Signed-off-by: Mark Brown <broonie@kernel.org>
122 lines
3.5 KiB
C
122 lines
3.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* atmel-pcm-dma.c -- ALSA PCM DMA support for the Atmel SoC.
|
|
*
|
|
* Copyright (C) 2012 Atmel
|
|
*
|
|
* Author: Bo Shen <voice.shen@atmel.com>
|
|
*
|
|
* Based on atmel-pcm by:
|
|
* Sedji Gaouaou <sedji.gaouaou@atmel.com>
|
|
* Copyright 2008 Atmel
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/dma-mapping.h>
|
|
#include <linux/dmaengine.h>
|
|
#include <linux/atmel-ssc.h>
|
|
#include <linux/platform_data/dma-atmel.h>
|
|
|
|
#include <sound/core.h>
|
|
#include <sound/pcm.h>
|
|
#include <sound/pcm_params.h>
|
|
#include <sound/soc.h>
|
|
#include <sound/dmaengine_pcm.h>
|
|
|
|
#include "atmel-pcm.h"
|
|
|
|
/*--------------------------------------------------------------------------*\
|
|
* Hardware definition
|
|
\*--------------------------------------------------------------------------*/
|
|
static const struct snd_pcm_hardware atmel_pcm_dma_hardware = {
|
|
.info = SNDRV_PCM_INFO_MMAP |
|
|
SNDRV_PCM_INFO_MMAP_VALID |
|
|
SNDRV_PCM_INFO_INTERLEAVED |
|
|
SNDRV_PCM_INFO_RESUME |
|
|
SNDRV_PCM_INFO_PAUSE,
|
|
.period_bytes_min = 256, /* lighting DMA overhead */
|
|
.period_bytes_max = 2 * 0xffff, /* if 2 bytes format */
|
|
.periods_min = 8,
|
|
.periods_max = 1024, /* no limit */
|
|
.buffer_bytes_max = 512 * 1024,
|
|
};
|
|
|
|
/**
|
|
* atmel_pcm_dma_irq: SSC interrupt handler for DMAENGINE enabled SSC
|
|
*
|
|
* We use DMAENGINE to send/receive data to/from SSC so this ISR is only to
|
|
* check if any overrun occured.
|
|
*/
|
|
static void atmel_pcm_dma_irq(u32 ssc_sr,
|
|
struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_soc_pcm_runtime *rtd = substream->private_data;
|
|
struct atmel_pcm_dma_params *prtd;
|
|
|
|
prtd = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
|
|
|
|
if (ssc_sr & prtd->mask->ssc_error) {
|
|
if (snd_pcm_running(substream))
|
|
pr_warn("atmel-pcm: buffer %s on %s (SSC_SR=%#x)\n",
|
|
substream->stream == SNDRV_PCM_STREAM_PLAYBACK
|
|
? "underrun" : "overrun", prtd->name,
|
|
ssc_sr);
|
|
|
|
/* stop RX and capture: will be enabled again at restart */
|
|
ssc_writex(prtd->ssc->regs, SSC_CR, prtd->mask->ssc_disable);
|
|
snd_pcm_stop_xrun(substream);
|
|
|
|
/* now drain RHR and read status to remove xrun condition */
|
|
ssc_readx(prtd->ssc->regs, SSC_RHR);
|
|
ssc_readx(prtd->ssc->regs, SSC_SR);
|
|
}
|
|
}
|
|
|
|
static int atmel_pcm_configure_dma(struct snd_pcm_substream *substream,
|
|
struct snd_pcm_hw_params *params, struct dma_slave_config *slave_config)
|
|
{
|
|
struct snd_soc_pcm_runtime *rtd = substream->private_data;
|
|
struct atmel_pcm_dma_params *prtd;
|
|
struct ssc_device *ssc;
|
|
int ret;
|
|
|
|
prtd = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
|
|
ssc = prtd->ssc;
|
|
|
|
ret = snd_hwparams_to_dma_slave_config(substream, params, slave_config);
|
|
if (ret) {
|
|
pr_err("atmel-pcm: hwparams to dma slave configure failed\n");
|
|
return ret;
|
|
}
|
|
|
|
slave_config->dst_addr = ssc->phybase + SSC_THR;
|
|
slave_config->dst_maxburst = 1;
|
|
|
|
slave_config->src_addr = ssc->phybase + SSC_RHR;
|
|
slave_config->src_maxburst = 1;
|
|
|
|
prtd->dma_intr_handler = atmel_pcm_dma_irq;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct snd_dmaengine_pcm_config atmel_dmaengine_pcm_config = {
|
|
.prepare_slave_config = atmel_pcm_configure_dma,
|
|
.pcm_hardware = &atmel_pcm_dma_hardware,
|
|
.prealloc_buffer_size = 64 * 1024,
|
|
};
|
|
|
|
int atmel_pcm_dma_platform_register(struct device *dev)
|
|
{
|
|
return devm_snd_dmaengine_pcm_register(dev,
|
|
&atmel_dmaengine_pcm_config, 0);
|
|
}
|
|
EXPORT_SYMBOL(atmel_pcm_dma_platform_register);
|
|
|
|
MODULE_AUTHOR("Bo Shen <voice.shen@atmel.com>");
|
|
MODULE_DESCRIPTION("Atmel DMA based PCM module");
|
|
MODULE_LICENSE("GPL");
|