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1// SPDX-License-Identifier: GPL-2.0-or-later2//3// Author: Kevin Wells <kevin.wells@nxp.com>4//5// Copyright (C) 2008 NXP Semiconductors6// Copyright 2023 Timesys Corporation <piotr.wojtaszczyk@timesys.com>7 8#include <linux/module.h>9#include <linux/init.h>10#include <linux/platform_device.h>11#include <linux/slab.h>12#include <linux/dma-mapping.h>13#include <linux/amba/pl08x.h>14 15#include <sound/core.h>16#include <sound/pcm.h>17#include <sound/pcm_params.h>18#include <sound/dmaengine_pcm.h>19#include <sound/soc.h>20 21#include "lpc3xxx-i2s.h"22 23#define STUB_FORMATS (SNDRV_PCM_FMTBIT_S8 | \24 SNDRV_PCM_FMTBIT_U8 | \25 SNDRV_PCM_FMTBIT_S16_LE | \26 SNDRV_PCM_FMTBIT_U16_LE | \27 SNDRV_PCM_FMTBIT_S24_LE | \28 SNDRV_PCM_FMTBIT_U24_LE | \29 SNDRV_PCM_FMTBIT_S32_LE | \30 SNDRV_PCM_FMTBIT_U32_LE | \31 SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE)32 33static const struct snd_pcm_hardware lpc3xxx_pcm_hardware = {34 .info = (SNDRV_PCM_INFO_MMAP |35 SNDRV_PCM_INFO_MMAP_VALID |36 SNDRV_PCM_INFO_INTERLEAVED |37 SNDRV_PCM_INFO_BLOCK_TRANSFER |38 SNDRV_PCM_INFO_PAUSE |39 SNDRV_PCM_INFO_RESUME),40 .formats = STUB_FORMATS,41 .period_bytes_min = 128,42 .period_bytes_max = 2048,43 .periods_min = 2,44 .periods_max = 1024,45 .buffer_bytes_max = 128 * 102446};47 48static const struct snd_dmaengine_pcm_config lpc3xxx_dmaengine_pcm_config = {49 .pcm_hardware = &lpc3xxx_pcm_hardware,50 .prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,51 .compat_filter_fn = pl08x_filter_id,52 .prealloc_buffer_size = 128 * 1024,53};54 55static const struct snd_soc_component_driver lpc3xxx_soc_platform_driver = {56 .name = "lpc32xx-pcm",57};58 59int lpc3xxx_pcm_register(struct platform_device *pdev)60{61 int ret;62 63 ret = devm_snd_dmaengine_pcm_register(&pdev->dev, &lpc3xxx_dmaengine_pcm_config, 0);64 if (ret) {65 dev_err(&pdev->dev, "failed to register dmaengine: %d\n", ret);66 return ret;67 }68 69 return devm_snd_soc_register_component(&pdev->dev, &lpc3xxx_soc_platform_driver,70 NULL, 0);71}72EXPORT_SYMBOL(lpc3xxx_pcm_register);73