sound/soc/jz4740/jz4740-pcm.c - kernel/msm-4.19 - Gitiles

 /*
  *  Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de>
  *
  *  This program is free software; you can redistribute	 it and/or modify it
  *  under  the terms of	 the GNU General  Public License as published by the
  *  Free Software Foundation;  either version 2 of the	License, or (at your
  *  option) any later version.
  *
  *  You should have received a copy of the  GNU General Public License along
  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  *  675 Mass Ave, Cambridge, MA 02139, USA.
  *
  */

 #include <linux/init.h>
 #include <linux/interrupt.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/slab.h>

 #include <linux/dma-mapping.h>

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

 #include <asm/mach-jz4740/dma.h>
 #include "jz4740-pcm.h"

 struct jz4740_runtime_data {
 	unsigned long dma_period;
 	dma_addr_t dma_start;
 	dma_addr_t dma_pos;
 	dma_addr_t dma_end;

 	struct jz4740_dma_chan *dma;

 	dma_addr_t fifo_addr;
 };

 /* identify hardware playback capabilities */
 static const struct snd_pcm_hardware jz4740_pcm_hardware = {
 	.info = SNDRV_PCM_INFO_MMAP |
 		SNDRV_PCM_INFO_MMAP_VALID |
 		SNDRV_PCM_INFO_INTERLEAVED |
 		SNDRV_PCM_INFO_BLOCK_TRANSFER,
 	.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8,

 	.rates			= SNDRV_PCM_RATE_8000_48000,
 	.channels_min		= 1,
 	.channels_max		= 2,
 	.period_bytes_min	= 16,
 	.period_bytes_max	= 2 * PAGE_SIZE,
 	.periods_min		= 2,
 	.periods_max		= 128,
 	.buffer_bytes_max	= 128 * 2 * PAGE_SIZE,
 	.fifo_size		= 32,
 };

 static void jz4740_pcm_start_transfer(struct jz4740_runtime_data *prtd,
 	struct snd_pcm_substream *substream)
 {
 	unsigned long count;

 	if (prtd->dma_pos == prtd->dma_end)
 		prtd->dma_pos = prtd->dma_start;

 	if (prtd->dma_pos + prtd->dma_period > prtd->dma_end)
 		count = prtd->dma_end - prtd->dma_pos;
 	else
 		count = prtd->dma_period;

 	jz4740_dma_disable(prtd->dma);

 	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 		jz4740_dma_set_src_addr(prtd->dma, prtd->dma_pos);
 		jz4740_dma_set_dst_addr(prtd->dma, prtd->fifo_addr);
 	} else {
 		jz4740_dma_set_src_addr(prtd->dma, prtd->fifo_addr);
 		jz4740_dma_set_dst_addr(prtd->dma, prtd->dma_pos);
 	}

 	jz4740_dma_set_transfer_count(prtd->dma, count);

 	prtd->dma_pos += count;

 	jz4740_dma_enable(prtd->dma);
 }

 static void jz4740_pcm_dma_transfer_done(struct jz4740_dma_chan *dma, int err,
 	void *dev_id)
 {
 	struct snd_pcm_substream *substream = dev_id;
 	struct snd_pcm_runtime *runtime = substream->runtime;
 	struct jz4740_runtime_data *prtd = runtime->private_data;

 	snd_pcm_period_elapsed(substream);

 	jz4740_pcm_start_transfer(prtd, substream);
 }

 static int jz4740_pcm_hw_params(struct snd_pcm_substream *substream,
 	struct snd_pcm_hw_params *params)
 {
 	struct snd_pcm_runtime *runtime = substream->runtime;
 	struct jz4740_runtime_data *prtd = runtime->private_data;
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
 	struct jz4740_pcm_config *config;

 	config = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);

 	if (!config)
 		return 0;

 	if (!prtd->dma) {
 		if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
 			prtd->dma = jz4740_dma_request(substream, "PCM Capture");
 		else
 			prtd->dma = jz4740_dma_request(substream, "PCM Playback");
 	}

 	if (!prtd->dma)
 		return -EBUSY;

 	jz4740_dma_configure(prtd->dma, &config->dma_config);
 	prtd->fifo_addr = config->fifo_addr;

 	jz4740_dma_set_complete_cb(prtd->dma, jz4740_pcm_dma_transfer_done);

 	snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
 	runtime->dma_bytes = params_buffer_bytes(params);

 	prtd->dma_period = params_period_bytes(params);
 	prtd->dma_start = runtime->dma_addr;
 	prtd->dma_pos = prtd->dma_start;
 	prtd->dma_end = prtd->dma_start + runtime->dma_bytes;

 	return 0;
 }

 static int jz4740_pcm_hw_free(struct snd_pcm_substream *substream)
 {
 	struct jz4740_runtime_data *prtd = substream->runtime->private_data;

 	snd_pcm_set_runtime_buffer(substream, NULL);
 	if (prtd->dma) {
 		jz4740_dma_free(prtd->dma);
 		prtd->dma = NULL;
 	}

 	return 0;
 }

 static int jz4740_pcm_prepare(struct snd_pcm_substream *substream)
 {
 	struct jz4740_runtime_data *prtd = substream->runtime->private_data;

 	if (!prtd->dma)
 		return -EBUSY;

 	prtd->dma_pos = prtd->dma_start;

 	return 0;
 }

 static int jz4740_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
 {
 	struct snd_pcm_runtime *runtime = substream->runtime;
 	struct jz4740_runtime_data *prtd = runtime->private_data;

 	switch (cmd) {
 	case SNDRV_PCM_TRIGGER_START:
 	case SNDRV_PCM_TRIGGER_RESUME:
 	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 		jz4740_pcm_start_transfer(prtd, substream);
 		break;
 	case SNDRV_PCM_TRIGGER_STOP:
 	case SNDRV_PCM_TRIGGER_SUSPEND:
 	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 		jz4740_dma_disable(prtd->dma);
 		break;
 	default:
 		break;
 	}

 	return 0;
 }

 static snd_pcm_uframes_t jz4740_pcm_pointer(struct snd_pcm_substream *substream)
 {
 	struct snd_pcm_runtime *runtime = substream->runtime;
 	struct jz4740_runtime_data *prtd = runtime->private_data;
 	unsigned long byte_offset;
 	snd_pcm_uframes_t offset;
 	struct jz4740_dma_chan *dma = prtd->dma;

 	/* prtd->dma_pos points to the end of the current transfer. So by
 	 * subtracting prdt->dma_start we get the offset to the end of the
 	 * current period in bytes. By subtracting the residue of the transfer
 	 * we get the current offset in bytes. */
 	byte_offset = prtd->dma_pos - prtd->dma_start;
 	byte_offset -= jz4740_dma_get_residue(dma);

 	offset = bytes_to_frames(runtime, byte_offset);
 	if (offset >= runtime->buffer_size)
 		offset = 0;

 	return offset;
 }

 static int jz4740_pcm_open(struct snd_pcm_substream *substream)
 {
 	struct snd_pcm_runtime *runtime = substream->runtime;
 	struct jz4740_runtime_data *prtd;

 	prtd = kzalloc(sizeof(*prtd), GFP_KERNEL);
 	if (prtd == NULL)
 		return -ENOMEM;

 	snd_soc_set_runtime_hwparams(substream, &jz4740_pcm_hardware);

 	runtime->private_data = prtd;

 	return 0;
 }

 static int jz4740_pcm_close(struct snd_pcm_substream *substream)
 {
 	struct snd_pcm_runtime *runtime = substream->runtime;
 	struct jz4740_runtime_data *prtd = runtime->private_data;

 	kfree(prtd);

 	return 0;
 }

 static int jz4740_pcm_mmap(struct snd_pcm_substream *substream,
 	struct vm_area_struct *vma)
 {
 	return remap_pfn_range(vma, vma->vm_start,
 			substream->dma_buffer.addr >> PAGE_SHIFT,
 			vma->vm_end - vma->vm_start, vma->vm_page_prot);
 }

 static struct snd_pcm_ops jz4740_pcm_ops = {
 	.open		= jz4740_pcm_open,
 	.close		= jz4740_pcm_close,
 	.ioctl		= snd_pcm_lib_ioctl,
 	.hw_params	= jz4740_pcm_hw_params,
 	.hw_free	= jz4740_pcm_hw_free,
 	.prepare	= jz4740_pcm_prepare,
 	.trigger	= jz4740_pcm_trigger,
 	.pointer	= jz4740_pcm_pointer,
 	.mmap		= jz4740_pcm_mmap,
 };

 static int jz4740_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, int stream)
 {
 	struct snd_pcm_substream *substream = pcm->streams[stream].substream;
 	struct snd_dma_buffer *buf = &substream->dma_buffer;
 	size_t size = jz4740_pcm_hardware.buffer_bytes_max;

 	buf->dev.type = SNDRV_DMA_TYPE_DEV;
 	buf->dev.dev = pcm->card->dev;
 	buf->private_data = NULL;

 	buf->area = dma_alloc_noncoherent(pcm->card->dev, size,
 					  &buf->addr, GFP_KERNEL);
 	if (!buf->area)
 		return -ENOMEM;

 	buf->bytes = size;

 	return 0;
 }

 static void jz4740_pcm_free(struct snd_pcm *pcm)
 {
 	struct snd_pcm_substream *substream;
 	struct snd_dma_buffer *buf;
 	int stream;

 	for (stream = 0; stream < SNDRV_PCM_STREAM_LAST; ++stream) {
 		substream = pcm->streams[stream].substream;
 		if (!substream)
 			continue;

 		buf = &substream->dma_buffer;
 		if (!buf->area)
 			continue;

 		dma_free_noncoherent(pcm->card->dev, buf->bytes, buf->area,
 				buf->addr);
 		buf->area = NULL;
 	}
 }

 static u64 jz4740_pcm_dmamask = DMA_BIT_MASK(32);

 static int jz4740_pcm_new(struct snd_soc_pcm_runtime *rtd)
 {
 	struct snd_card *card = rtd->card->snd_card;
 	struct snd_pcm *pcm = rtd->pcm;
 	int ret = 0;

 	if (!card->dev->dma_mask)
 		card->dev->dma_mask = &jz4740_pcm_dmamask;

 	if (!card->dev->coherent_dma_mask)
 		card->dev->coherent_dma_mask = DMA_BIT_MASK(32);

 	if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
 		ret = jz4740_pcm_preallocate_dma_buffer(pcm,
 			SNDRV_PCM_STREAM_PLAYBACK);
 		if (ret)
 			goto err;
 	}

 	if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
 		ret = jz4740_pcm_preallocate_dma_buffer(pcm,
 			SNDRV_PCM_STREAM_CAPTURE);
 		if (ret)
 			goto err;
 	}

 err:
 	return ret;
 }

 static struct snd_soc_platform_driver jz4740_soc_platform = {
 		.ops		= &jz4740_pcm_ops,
 		.pcm_new	= jz4740_pcm_new,
 		.pcm_free	= jz4740_pcm_free,
 };

 static int jz4740_pcm_probe(struct platform_device *pdev)
 {
 	return snd_soc_register_platform(&pdev->dev, &jz4740_soc_platform);
 }

 static int jz4740_pcm_remove(struct platform_device *pdev)
 {
 	snd_soc_unregister_platform(&pdev->dev);
 	return 0;
 }

 static struct platform_driver jz4740_pcm_driver = {
 	.probe = jz4740_pcm_probe,
 	.remove = jz4740_pcm_remove,
 	.driver = {
 		.name = "jz4740-pcm-audio",
 		.owner = THIS_MODULE,
 	},
 };

 module_platform_driver(jz4740_pcm_driver);

 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
 MODULE_DESCRIPTION("Ingenic SoC JZ4740 PCM driver");
 MODULE_LICENSE("GPL");
	/*
	* Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de>
	*
	* This program is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License as published by the
	* Free Software Foundation; either version 2 of the License, or (at your
	* option) any later version.
	*
	* You should have received a copy of the GNU General Public License along
	* with this program; if not, write to the Free Software Foundation, Inc.,
	* 675 Mass Ave, Cambridge, MA 02139, USA.
	*
	*/

	#include <linux/init.h>
	#include <linux/interrupt.h>
	#include <linux/kernel.h>
	#include <linux/module.h>
	#include <linux/platform_device.h>
	#include <linux/slab.h>

	#include <linux/dma-mapping.h>

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

	#include <asm/mach-jz4740/dma.h>
	#include "jz4740-pcm.h"

	struct jz4740_runtime_data {
	unsigned long dma_period;
	dma_addr_t dma_start;
	dma_addr_t dma_pos;
	dma_addr_t dma_end;

	struct jz4740_dma_chan *dma;

	dma_addr_t fifo_addr;
	};

	/* identify hardware playback capabilities */
	static const struct snd_pcm_hardware jz4740_pcm_hardware = {
	.info = SNDRV_PCM_INFO_MMAP \|
	SNDRV_PCM_INFO_MMAP_VALID \|
	SNDRV_PCM_INFO_INTERLEAVED \|
	SNDRV_PCM_INFO_BLOCK_TRANSFER,
	.formats = SNDRV_PCM_FMTBIT_S16_LE \| SNDRV_PCM_FMTBIT_S8,

	.rates = SNDRV_PCM_RATE_8000_48000,
	.channels_min = 1,
	.channels_max = 2,
	.period_bytes_min = 16,
	.period_bytes_max = 2 * PAGE_SIZE,
	.periods_min = 2,
	.periods_max = 128,
	.buffer_bytes_max = 128 * 2 * PAGE_SIZE,
	.fifo_size = 32,
	};

	static void jz4740_pcm_start_transfer(struct jz4740_runtime_data *prtd,
	struct snd_pcm_substream *substream)
	{
	unsigned long count;

	if (prtd->dma_pos == prtd->dma_end)
	prtd->dma_pos = prtd->dma_start;

	if (prtd->dma_pos + prtd->dma_period > prtd->dma_end)
	count = prtd->dma_end - prtd->dma_pos;
	else
	count = prtd->dma_period;

	jz4740_dma_disable(prtd->dma);

	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
	jz4740_dma_set_src_addr(prtd->dma, prtd->dma_pos);
	jz4740_dma_set_dst_addr(prtd->dma, prtd->fifo_addr);
	} else {
	jz4740_dma_set_src_addr(prtd->dma, prtd->fifo_addr);
	jz4740_dma_set_dst_addr(prtd->dma, prtd->dma_pos);
	}

	jz4740_dma_set_transfer_count(prtd->dma, count);

	prtd->dma_pos += count;

	jz4740_dma_enable(prtd->dma);
	}

	static void jz4740_pcm_dma_transfer_done(struct jz4740_dma_chan *dma, int err,
	void *dev_id)
	{
	struct snd_pcm_substream *substream = dev_id;
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct jz4740_runtime_data *prtd = runtime->private_data;

	snd_pcm_period_elapsed(substream);

	jz4740_pcm_start_transfer(prtd, substream);
	}

	static int jz4740_pcm_hw_params(struct snd_pcm_substream *substream,
	struct snd_pcm_hw_params *params)
	{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct jz4740_runtime_data *prtd = runtime->private_data;
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct jz4740_pcm_config *config;

	config = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);

	if (!config)
	return 0;

	if (!prtd->dma) {
	if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
	prtd->dma = jz4740_dma_request(substream, "PCM Capture");
	else
	prtd->dma = jz4740_dma_request(substream, "PCM Playback");
	}

	if (!prtd->dma)
	return -EBUSY;

	jz4740_dma_configure(prtd->dma, &config->dma_config);
	prtd->fifo_addr = config->fifo_addr;

	jz4740_dma_set_complete_cb(prtd->dma, jz4740_pcm_dma_transfer_done);

	snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
	runtime->dma_bytes = params_buffer_bytes(params);

	prtd->dma_period = params_period_bytes(params);
	prtd->dma_start = runtime->dma_addr;
	prtd->dma_pos = prtd->dma_start;
	prtd->dma_end = prtd->dma_start + runtime->dma_bytes;

	return 0;
	}

	static int jz4740_pcm_hw_free(struct snd_pcm_substream *substream)
	{
	struct jz4740_runtime_data *prtd = substream->runtime->private_data;

	snd_pcm_set_runtime_buffer(substream, NULL);
	if (prtd->dma) {
	jz4740_dma_free(prtd->dma);
	prtd->dma = NULL;
	}

	return 0;
	}

	static int jz4740_pcm_prepare(struct snd_pcm_substream *substream)
	{
	struct jz4740_runtime_data *prtd = substream->runtime->private_data;

	if (!prtd->dma)
	return -EBUSY;

	prtd->dma_pos = prtd->dma_start;

	return 0;
	}

	static int jz4740_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
	{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct jz4740_runtime_data *prtd = runtime->private_data;

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
	case SNDRV_PCM_TRIGGER_RESUME:
	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
	jz4740_pcm_start_transfer(prtd, substream);
	break;
	case SNDRV_PCM_TRIGGER_STOP:
	case SNDRV_PCM_TRIGGER_SUSPEND:
	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
	jz4740_dma_disable(prtd->dma);
	break;
	default:
	break;
	}

	return 0;
	}

	static snd_pcm_uframes_t jz4740_pcm_pointer(struct snd_pcm_substream *substream)
	{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct jz4740_runtime_data *prtd = runtime->private_data;
	unsigned long byte_offset;
	snd_pcm_uframes_t offset;
	struct jz4740_dma_chan *dma = prtd->dma;

	/* prtd->dma_pos points to the end of the current transfer. So by
	* subtracting prdt->dma_start we get the offset to the end of the
	* current period in bytes. By subtracting the residue of the transfer
	* we get the current offset in bytes. */
	byte_offset = prtd->dma_pos - prtd->dma_start;
	byte_offset -= jz4740_dma_get_residue(dma);

	offset = bytes_to_frames(runtime, byte_offset);
	if (offset >= runtime->buffer_size)
	offset = 0;

	return offset;
	}

	static int jz4740_pcm_open(struct snd_pcm_substream *substream)
	{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct jz4740_runtime_data *prtd;

	prtd = kzalloc(sizeof(*prtd), GFP_KERNEL);
	if (prtd == NULL)
	return -ENOMEM;

	snd_soc_set_runtime_hwparams(substream, &jz4740_pcm_hardware);

	runtime->private_data = prtd;

	return 0;
	}

	static int jz4740_pcm_close(struct snd_pcm_substream *substream)
	{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct jz4740_runtime_data *prtd = runtime->private_data;

	kfree(prtd);

	return 0;
	}

	static int jz4740_pcm_mmap(struct snd_pcm_substream *substream,
	struct vm_area_struct *vma)
	{
	return remap_pfn_range(vma, vma->vm_start,
	substream->dma_buffer.addr >> PAGE_SHIFT,
	vma->vm_end - vma->vm_start, vma->vm_page_prot);
	}

	static struct snd_pcm_ops jz4740_pcm_ops = {
	.open = jz4740_pcm_open,
	.close = jz4740_pcm_close,
	.ioctl = snd_pcm_lib_ioctl,
	.hw_params = jz4740_pcm_hw_params,
	.hw_free = jz4740_pcm_hw_free,
	.prepare = jz4740_pcm_prepare,
	.trigger = jz4740_pcm_trigger,
	.pointer = jz4740_pcm_pointer,
	.mmap = jz4740_pcm_mmap,
	};

	static int jz4740_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, int stream)
	{
	struct snd_pcm_substream *substream = pcm->streams[stream].substream;
	struct snd_dma_buffer *buf = &substream->dma_buffer;
	size_t size = jz4740_pcm_hardware.buffer_bytes_max;

	buf->dev.type = SNDRV_DMA_TYPE_DEV;
	buf->dev.dev = pcm->card->dev;
	buf->private_data = NULL;

	buf->area = dma_alloc_noncoherent(pcm->card->dev, size,
	&buf->addr, GFP_KERNEL);
	if (!buf->area)
	return -ENOMEM;

	buf->bytes = size;

	return 0;
	}

	static void jz4740_pcm_free(struct snd_pcm *pcm)
	{
	struct snd_pcm_substream *substream;
	struct snd_dma_buffer *buf;
	int stream;

	for (stream = 0; stream < SNDRV_PCM_STREAM_LAST; ++stream) {
	substream = pcm->streams[stream].substream;
	if (!substream)
	continue;

	buf = &substream->dma_buffer;
	if (!buf->area)
	continue;

	dma_free_noncoherent(pcm->card->dev, buf->bytes, buf->area,
	buf->addr);
	buf->area = NULL;
	}
	}

	static u64 jz4740_pcm_dmamask = DMA_BIT_MASK(32);

	static int jz4740_pcm_new(struct snd_soc_pcm_runtime *rtd)
	{
	struct snd_card *card = rtd->card->snd_card;
	struct snd_pcm *pcm = rtd->pcm;
	int ret = 0;

	if (!card->dev->dma_mask)
	card->dev->dma_mask = &jz4740_pcm_dmamask;

	if (!card->dev->coherent_dma_mask)
	card->dev->coherent_dma_mask = DMA_BIT_MASK(32);

	if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
	ret = jz4740_pcm_preallocate_dma_buffer(pcm,
	SNDRV_PCM_STREAM_PLAYBACK);
	if (ret)
	goto err;
	}

	if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
	ret = jz4740_pcm_preallocate_dma_buffer(pcm,
	SNDRV_PCM_STREAM_CAPTURE);
	if (ret)
	goto err;
	}

	err:
	return ret;
	}

	static struct snd_soc_platform_driver jz4740_soc_platform = {
	.ops = &jz4740_pcm_ops,
	.pcm_new = jz4740_pcm_new,
	.pcm_free = jz4740_pcm_free,
	};

	static int jz4740_pcm_probe(struct platform_device *pdev)
	{
	return snd_soc_register_platform(&pdev->dev, &jz4740_soc_platform);
	}

	static int jz4740_pcm_remove(struct platform_device *pdev)
	{
	snd_soc_unregister_platform(&pdev->dev);
	return 0;
	}

	static struct platform_driver jz4740_pcm_driver = {
	.probe = jz4740_pcm_probe,
	.remove = jz4740_pcm_remove,
	.driver = {
	.name = "jz4740-pcm-audio",
	.owner = THIS_MODULE,
	},
	};

	module_platform_driver(jz4740_pcm_driver);

	MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
	MODULE_DESCRIPTION("Ingenic SoC JZ4740 PCM driver");
	MODULE_LICENSE("GPL");