7e1529d0dc
0debf7abc [dma] When using DMA, if the DMA addr spans 128MB boundary we have to split the DMA transfer into two so that each one doesn't exceed the boundary. 4f7ed7449 Merge "[eth] change rxterm and vcm to link DianXin router" into v4.1.0 feb60bba5 Merge "[audio][lt9611]add drivers" into v4.1.0 a3dde371c [eth] change rxterm and vcm to link DianXin router e615d3a43 [audio][lt9611]add drivers Change-Id: If4fdcbc32df6aeaed04da0efbd23455376e2a53c
154 lines
3.1 KiB
C
154 lines
3.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Audio Dummy driver on CVITEK CV1835
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*
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* Copyright 2021 CVITEK
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*
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* Author: RuiLong
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*
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*/
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#include <linux/clk.h>
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#include <linux/delay.h>
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#include <linux/gcd.h>
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#include <linux/gpio/consumer.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/pm.h>
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#include <linux/slab.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include <sound/tlv.h>
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#include <sound/soc.h>
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#include <linux/delay.h>
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#include <linux/workqueue.h>
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#include <linux/i2c.h>
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#include <linux/mod_devicetable.h>
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#include <linux/module.h>
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#include <linux/regmap.h>
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#include <sound/soc.h>
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static bool initFlag;
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struct work_struct work;
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struct workqueue_struct *initWork;
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static void initWorkFuc(struct work_struct *work);
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static const struct snd_soc_component_driver dummy_component_driver = {
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};
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static int dummy_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
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{
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return 0;
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}
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static const struct snd_soc_dai_ops dummy_dai_ops = {
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.hw_params = dummy_hw_params,
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};
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#define DUMMY_FORMATS (SNDRV_PCM_FMTBIT_S16_LE \
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| SNDRV_PCM_FMTBIT_S24_LE \
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| SNDRV_PCM_FMTBIT_S32_LE)
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static struct snd_soc_dai_driver dummy_dai_driver = {
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.name = "dummy_codec-aif",
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.playback = {
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.stream_name = "Playback",
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.channels_min = 1,
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.channels_max = 8,
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.rates = SNDRV_PCM_RATE_8000_192000,
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.formats = DUMMY_FORMATS,
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},
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.capture = {
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.stream_name = "Capture",
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.channels_min = 1,
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.channels_max = 8,
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.rates = SNDRV_PCM_RATE_8000_192000,
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.formats = DUMMY_FORMATS,
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},
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.ops = &dummy_dai_ops,
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.symmetric_rates = 1,
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};
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static int dummy_codec_probe(struct platform_device *pdev)
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{
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return devm_snd_soc_register_component(&pdev->dev, &dummy_component_driver,
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&dummy_dai_driver, 1);
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}
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static int dummy_codec_remove(struct platform_device *dev)
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{
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return 0;
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}
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static void dummy_codec_release(struct device *dev)
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{
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return;
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}
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static struct platform_driver cvitek_dummy_codec_driver = {
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.driver = {
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.name = "dummy_codec",
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},
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.probe = dummy_codec_probe,
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.remove = dummy_codec_remove,
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};
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static struct platform_device cvitek_dummy_codec_dev = {
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.name = "dummy_codec",
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.id = -1,
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.dev = {
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.release = dummy_codec_release,
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},
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};
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static void initWorkFuc(struct work_struct *work)
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{
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char timeout = 0;
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pr_info("dummy_codec %s\n", __func__);
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if (!initFlag) {
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platform_device_register(&cvitek_dummy_codec_dev);
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platform_driver_register(&cvitek_dummy_codec_driver);
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initFlag = true;
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}
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}
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// register dummy coudec after internal codec register.
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static int dummy_codec_init(void)
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{
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initFlag = false;
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initWork = create_workqueue("initWork");
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INIT_WORK(&work, initWorkFuc);
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queue_work(initWork, &work);
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return 0;
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}
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static void dummy_codec_exit(void)
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{
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destroy_workqueue(initWork);
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if (initFlag) {
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platform_device_unregister(&cvitek_dummy_codec_dev);
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platform_driver_unregister(&cvitek_dummy_codec_driver);
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}
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initFlag = false;
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}
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module_init(dummy_codec_init);
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module_exit(dummy_codec_exit);
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MODULE_DESCRIPTION("ASoC Dummy CODEC driver");
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MODULE_AUTHOR("RuiLong.Chen <ruilong.chen@cvitek.com>");
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MODULE_LICENSE("GPL v2");
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