[mirror_ubuntu-jammy-kernel.git] / sound / soc / pxa / mmp-pcm.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * linux/sound/soc/pxa/mmp-pcm.c
 *
 * Copyright (C) 2011 Marvell International Ltd.
 */
#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/platform_data/dma-mmp_tdma.h>
#include <linux/platform_data/mmp_audio.h>

#include <sound/pxa2xx-lib.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/dmaengine_pcm.h>

#define DRV_NAME "mmp-pcm"

struct mmp_dma_data {
	int ssp_id;
	struct resource *dma_res;
};

#define MMP_PCM_INFO (SNDRV_PCM_INFO_MMAP |	\
		SNDRV_PCM_INFO_MMAP_VALID |	\
		SNDRV_PCM_INFO_INTERLEAVED |	\
		SNDRV_PCM_INFO_PAUSE |		\
		SNDRV_PCM_INFO_RESUME |		\
		SNDRV_PCM_INFO_NO_PERIOD_WAKEUP)

static struct snd_pcm_hardware mmp_pcm_hardware[] = {
	{
		.info			= MMP_PCM_INFO,
		.period_bytes_min	= 1024,
		.period_bytes_max	= 2048,
		.periods_min		= 2,
		.periods_max		= 32,
		.buffer_bytes_max	= 4096,
		.fifo_size		= 32,
	},
	{
		.info			= MMP_PCM_INFO,
		.period_bytes_min	= 1024,
		.period_bytes_max	= 2048,
		.periods_min		= 2,
		.periods_max		= 32,
		.buffer_bytes_max	= 4096,
		.fifo_size		= 32,
	},
};

static int mmp_pcm_hw_params(struct snd_soc_component *component,
			     struct snd_pcm_substream *substream,
			     struct snd_pcm_hw_params *params)
{
	struct dma_chan *chan = snd_dmaengine_pcm_get_chan(substream);
	struct dma_slave_config slave_config;
	int ret;

	ret =
	    snd_dmaengine_pcm_prepare_slave_config(substream, params,
						   &slave_config);
	if (ret)
		return ret;

	ret = dmaengine_slave_config(chan, &slave_config);
	if (ret)
		return ret;

	snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);

	return 0;
}

static int mmp_pcm_trigger(struct snd_soc_component *component,
			   struct snd_pcm_substream *substream, int cmd)
{
	return snd_dmaengine_pcm_trigger(substream, cmd);
}

static snd_pcm_uframes_t mmp_pcm_pointer(struct snd_soc_component *component,
					 struct snd_pcm_substream *substream)
{
	return snd_dmaengine_pcm_pointer(substream);
}

static bool filter(struct dma_chan *chan, void *param)
{
	struct mmp_dma_data *dma_data = param;
	bool found = false;
	char *devname;

	devname = kasprintf(GFP_KERNEL, "%s.%d", dma_data->dma_res->name,
		dma_data->ssp_id);
	if ((strcmp(dev_name(chan->device->dev), devname) == 0) &&
		(chan->chan_id == dma_data->dma_res->start)) {
		found = true;
	}

	kfree(devname);
	return found;
}

static int mmp_pcm_open(struct snd_soc_component *component,
			struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
	struct platform_device *pdev = to_platform_device(component->dev);
	struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
	struct mmp_dma_data dma_data;
	struct resource *r;

	r = platform_get_resource(pdev, IORESOURCE_DMA, substream->stream);
	if (!r)
		return -EBUSY;

	snd_soc_set_runtime_hwparams(substream,
				&mmp_pcm_hardware[substream->stream]);

	dma_data.dma_res = r;
	dma_data.ssp_id = cpu_dai->id;

	return snd_dmaengine_pcm_open_request_chan(substream, filter,
		    &dma_data);
}

static int mmp_pcm_close(struct snd_soc_component *component,
			 struct snd_pcm_substream *substream)
{
	return snd_dmaengine_pcm_close_release_chan(substream);
}

static int mmp_pcm_mmap(struct snd_soc_component *component,
			struct snd_pcm_substream *substream,
			struct vm_area_struct *vma)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	unsigned long off = vma->vm_pgoff;

	vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
	return remap_pfn_range(vma, vma->vm_start,
		__phys_to_pfn(runtime->dma_addr) + off,
		vma->vm_end - vma->vm_start, vma->vm_page_prot);
}

static void mmp_pcm_free_dma_buffers(struct snd_soc_component *component,
				     struct snd_pcm *pcm)
{
	struct snd_pcm_substream *substream;
	struct snd_dma_buffer *buf;
	int stream;
	struct gen_pool *gpool;

	gpool = sram_get_gpool("asram");
	if (!gpool)
		return;

	for (stream = 0; stream < 2; stream++) {
		size_t size = mmp_pcm_hardware[stream].buffer_bytes_max;

		substream = pcm->streams[stream].substream;
		if (!substream)
			continue;

		buf = &substream->dma_buffer;
		if (!buf->area)
			continue;
		gen_pool_free(gpool, (unsigned long)buf->area, size);
		buf->area = NULL;
	}

}

static int mmp_pcm_preallocate_dma_buffer(struct snd_pcm_substream *substream,
								int stream)
{
	struct snd_dma_buffer *buf = &substream->dma_buffer;
	size_t size = mmp_pcm_hardware[stream].buffer_bytes_max;
	struct gen_pool *gpool;

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

	gpool = sram_get_gpool("asram");
	if (!gpool)
		return -ENOMEM;

	buf->area = gen_pool_dma_alloc(gpool, size, &buf->addr);
	if (!buf->area)
		return -ENOMEM;
	buf->bytes = size;
	return 0;
}

static int mmp_pcm_new(struct snd_soc_component *component,
		       struct snd_soc_pcm_runtime *rtd)
{
	struct snd_pcm_substream *substream;
	struct snd_pcm *pcm = rtd->pcm;
	int ret, stream;

	for (stream = 0; stream < 2; stream++) {
		substream = pcm->streams[stream].substream;

		ret = mmp_pcm_preallocate_dma_buffer(substream,	stream);
		if (ret)
			goto err;
	}

	return 0;

err:
	mmp_pcm_free_dma_buffers(component, pcm);
	return ret;
}

static const struct snd_soc_component_driver mmp_soc_component = {
	.name		= DRV_NAME,
	.open		= mmp_pcm_open,
	.close		= mmp_pcm_close,
	.hw_params	= mmp_pcm_hw_params,
	.trigger	= mmp_pcm_trigger,
	.pointer	= mmp_pcm_pointer,
	.mmap		= mmp_pcm_mmap,
	.pcm_construct	= mmp_pcm_new,
	.pcm_destruct	= mmp_pcm_free_dma_buffers,
};

static int mmp_pcm_probe(struct platform_device *pdev)
{
	struct mmp_audio_platdata *pdata = pdev->dev.platform_data;

	if (pdata) {
		mmp_pcm_hardware[SNDRV_PCM_STREAM_PLAYBACK].buffer_bytes_max =
						pdata->buffer_max_playback;
		mmp_pcm_hardware[SNDRV_PCM_STREAM_PLAYBACK].period_bytes_max =
						pdata->period_max_playback;
		mmp_pcm_hardware[SNDRV_PCM_STREAM_CAPTURE].buffer_bytes_max =
						pdata->buffer_max_capture;
		mmp_pcm_hardware[SNDRV_PCM_STREAM_CAPTURE].period_bytes_max =
						pdata->period_max_capture;
	}
	return devm_snd_soc_register_component(&pdev->dev, &mmp_soc_component,
					       NULL, 0);
}

static struct platform_driver mmp_pcm_driver = {
	.driver = {
		.name = "mmp-pcm-audio",
	},

	.probe = mmp_pcm_probe,
};

module_platform_driver(mmp_pcm_driver);

MODULE_AUTHOR("Leo Yan <leoy@marvell.com>");
MODULE_DESCRIPTION("MMP Soc Audio DMA module");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:mmp-pcm-audio");
Commit	Line	Data
2874c5fd	1	// SPDX-License-Identifier: GPL-2.0-or-later
7a824e21 ZG	2	/*
	3	* linux/sound/soc/pxa/mmp-pcm.c
	4	*
	5	* Copyright (C) 2011 Marvell International Ltd.
7a824e21 ZG	6	*/
	7	#include <linux/module.h>
	8	#include <linux/init.h>
	9	#include <linux/platform_device.h>
	10	#include <linux/slab.h>
	11	#include <linux/dma-mapping.h>
	12	#include <linux/dmaengine.h>
ca057410	13	#include <linux/platform_data/dma-mmp_tdma.h>
7a824e21	14	#include <linux/platform_data/mmp_audio.h>
d65a1458	15
7a824e21 ZG	16	#include <sound/pxa2xx-lib.h>
	17	#include <sound/core.h>
	18	#include <sound/pcm.h>
	19	#include <sound/pcm_params.h>
	20	#include <sound/soc.h>
7a824e21 ZG	21	#include <sound/dmaengine_pcm.h>
7a824e21 ZG	22
797d1697 KM	23	#define DRV_NAME "mmp-pcm"
797d1697 KM	24
7a824e21 ZG	25	struct mmp_dma_data {
	26	int ssp_id;
	27	struct resource *dma_res;
	28	};
	29
	30	#define MMP_PCM_INFO (SNDRV_PCM_INFO_MMAP \| \
	31	SNDRV_PCM_INFO_MMAP_VALID \| \
	32	SNDRV_PCM_INFO_INTERLEAVED \| \
	33	SNDRV_PCM_INFO_PAUSE \| \
a22e2922 QZ	34	SNDRV_PCM_INFO_RESUME \| \
a22e2922 QZ	35	SNDRV_PCM_INFO_NO_PERIOD_WAKEUP)
7a824e21	36
7a824e21 ZG	37	static struct snd_pcm_hardware mmp_pcm_hardware[] = {
	38	{
	39	.info = MMP_PCM_INFO,
7a824e21 ZG	40	.period_bytes_min = 1024,
	41	.period_bytes_max = 2048,
	42	.periods_min = 2,
	43	.periods_max = 32,
	44	.buffer_bytes_max = 4096,
	45	.fifo_size = 32,
	46	},
	47	{
	48	.info = MMP_PCM_INFO,
7a824e21 ZG	49	.period_bytes_min = 1024,
	50	.period_bytes_max = 2048,
	51	.periods_min = 2,
	52	.periods_max = 32,
	53	.buffer_bytes_max = 4096,
	54	.fifo_size = 32,
	55	},
	56	};
	57
540e59c6 KM	58	static int mmp_pcm_hw_params(struct snd_soc_component *component,
	59	struct snd_pcm_substream *substream,
	60	struct snd_pcm_hw_params *params)
7a824e21 ZG	61	{
7a824e21 ZG	62	struct dma_chan *chan = snd_dmaengine_pcm_get_chan(substream);
7a824e21 ZG	63	struct dma_slave_config slave_config;
	64	int ret;
	65
48b752ac QZ	66	ret =
	67	snd_dmaengine_pcm_prepare_slave_config(substream, params,
	68	&slave_config);
7a824e21 ZG	69	if (ret)
	70	return ret;
	71
7a824e21 ZG	72	ret = dmaengine_slave_config(chan, &slave_config);
	73	if (ret)
	74	return ret;
	75
	76	snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
	77
	78	return 0;
	79	}
	80
540e59c6 KM	81	static int mmp_pcm_trigger(struct snd_soc_component *component,
	82	struct snd_pcm_substream *substream, int cmd)
	83	{
	84	return snd_dmaengine_pcm_trigger(substream, cmd);
	85	}
	86
	87	static snd_pcm_uframes_t mmp_pcm_pointer(struct snd_soc_component *component,
	88	struct snd_pcm_substream *substream)
	89	{
	90	return snd_dmaengine_pcm_pointer(substream);
	91	}
	92
7a824e21 ZG	93	static bool filter(struct dma_chan chan, void param)
	94	{
	95	struct mmp_dma_data *dma_data = param;
	96	bool found = false;
	97	char *devname;
	98
	99	devname = kasprintf(GFP_KERNEL, "%s.%d", dma_data->dma_res->name,
	100	dma_data->ssp_id);
	101	if ((strcmp(dev_name(chan->device->dev), devname) == 0) &&
	102	(chan->chan_id == dma_data->dma_res->start)) {
	103	found = true;
	104	}
	105
	106	kfree(devname);
	107	return found;
	108	}
	109
540e59c6 KM	110	static int mmp_pcm_open(struct snd_soc_component *component,
540e59c6 KM	111	struct snd_pcm_substream *substream)
7a824e21	112	{
83b95c2f	113	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
797d1697	114	struct platform_device *pdev = to_platform_device(component->dev);
8d8fef28	115	struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
ac581e60	116	struct mmp_dma_data dma_data;
7a824e21	117	struct resource *r;
7a824e21 ZG	118
	119	r = platform_get_resource(pdev, IORESOURCE_DMA, substream->stream);
	120	if (!r)
	121	return -EBUSY;
	122
	123	snd_soc_set_runtime_hwparams(substream,
	124	&mmp_pcm_hardware[substream->stream]);
7a824e21	125
ac581e60 LPC	126	dma_data.dma_res = r;
ac581e60 LPC	127	dma_data.ssp_id = cpu_dai->id;
7a824e21	128
7c1c1d4a LPC	129	return snd_dmaengine_pcm_open_request_chan(substream, filter,
7c1c1d4a LPC	130	&dma_data);
7a824e21 ZG	131	}
7a824e21 ZG	132
540e59c6 KM	133	static int mmp_pcm_close(struct snd_soc_component *component,
	134	struct snd_pcm_substream *substream)
	135	{
	136	return snd_dmaengine_pcm_close_release_chan(substream);
	137	}
	138
	139	static int mmp_pcm_mmap(struct snd_soc_component *component,
	140	struct snd_pcm_substream *substream,
	141	struct vm_area_struct *vma)
7a824e21 ZG	142	{
	143	struct snd_pcm_runtime *runtime = substream->runtime;
	144	unsigned long off = vma->vm_pgoff;
	145
	146	vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
	147	return remap_pfn_range(vma, vma->vm_start,
	148	__phys_to_pfn(runtime->dma_addr) + off,
	149	vma->vm_end - vma->vm_start, vma->vm_page_prot);
	150	}
	151
540e59c6 KM	152	static void mmp_pcm_free_dma_buffers(struct snd_soc_component *component,
540e59c6 KM	153	struct snd_pcm *pcm)
7a824e21 ZG	154	{
	155	struct snd_pcm_substream *substream;
	156	struct snd_dma_buffer *buf;
	157	int stream;
	158	struct gen_pool *gpool;
	159
	160	gpool = sram_get_gpool("asram");
	161	if (!gpool)
	162	return;
	163
	164	for (stream = 0; stream < 2; stream++) {
	165	size_t size = mmp_pcm_hardware[stream].buffer_bytes_max;
	166
	167	substream = pcm->streams[stream].substream;
	168	if (!substream)
	169	continue;
	170
	171	buf = &substream->dma_buffer;
	172	if (!buf->area)
	173	continue;
	174	gen_pool_free(gpool, (unsigned long)buf->area, size);
	175	buf->area = NULL;
	176	}
	177
7a824e21 ZG	178	}
	179
	180	static int mmp_pcm_preallocate_dma_buffer(struct snd_pcm_substream *substream,
	181	int stream)
	182	{
	183	struct snd_dma_buffer *buf = &substream->dma_buffer;
	184	size_t size = mmp_pcm_hardware[stream].buffer_bytes_max;
	185	struct gen_pool *gpool;
	186
	187	buf->dev.type = SNDRV_DMA_TYPE_DEV;
	188	buf->dev.dev = substream->pcm->card->dev;
	189	buf->private_data = NULL;
	190
	191	gpool = sram_get_gpool("asram");
	192	if (!gpool)
	193	return -ENOMEM;
	194
92a2e1cb	195	buf->area = gen_pool_dma_alloc(gpool, size, &buf->addr);
7a824e21 ZG	196	if (!buf->area)
7a824e21 ZG	197	return -ENOMEM;
7a824e21 ZG	198	buf->bytes = size;
	199	return 0;
	200	}
	201
540e59c6 KM	202	static int mmp_pcm_new(struct snd_soc_component *component,
540e59c6 KM	203	struct snd_soc_pcm_runtime *rtd)
7a824e21 ZG	204	{
	205	struct snd_pcm_substream *substream;
	206	struct snd_pcm *pcm = rtd->pcm;
00a25480	207	int ret, stream;
7a824e21 ZG	208
	209	for (stream = 0; stream < 2; stream++) {
	210	substream = pcm->streams[stream].substream;
	211
	212	ret = mmp_pcm_preallocate_dma_buffer(substream, stream);
	213	if (ret)
	214	goto err;
	215	}
	216
	217	return 0;
	218
	219	err:
540e59c6	220	mmp_pcm_free_dma_buffers(component, pcm);
7a824e21 ZG	221	return ret;
	222	}
	223
797d1697 KM	224	static const struct snd_soc_component_driver mmp_soc_component = {
797d1697 KM	225	.name = DRV_NAME,
540e59c6 KM	226	.open = mmp_pcm_open,
540e59c6 KM	227	.close = mmp_pcm_close,
540e59c6 KM	228	.hw_params = mmp_pcm_hw_params,
	229	.trigger = mmp_pcm_trigger,
	230	.pointer = mmp_pcm_pointer,
	231	.mmap = mmp_pcm_mmap,
	232	.pcm_construct = mmp_pcm_new,
	233	.pcm_destruct = mmp_pcm_free_dma_buffers,
7a824e21 ZG	234	};
7a824e21 ZG	235
570f6fe1	236	static int mmp_pcm_probe(struct platform_device *pdev)
7a824e21 ZG	237	{
	238	struct mmp_audio_platdata *pdata = pdev->dev.platform_data;
	239
	240	if (pdata) {
	241	mmp_pcm_hardware[SNDRV_PCM_STREAM_PLAYBACK].buffer_bytes_max =
	242	pdata->buffer_max_playback;
	243	mmp_pcm_hardware[SNDRV_PCM_STREAM_PLAYBACK].period_bytes_max =
	244	pdata->period_max_playback;
	245	mmp_pcm_hardware[SNDRV_PCM_STREAM_CAPTURE].buffer_bytes_max =
	246	pdata->buffer_max_capture;
	247	mmp_pcm_hardware[SNDRV_PCM_STREAM_CAPTURE].period_bytes_max =
	248	pdata->period_max_capture;
	249	}
797d1697 KM	250	return devm_snd_soc_register_component(&pdev->dev, &mmp_soc_component,
797d1697 KM	251	NULL, 0);
7a824e21 ZG	252	}
	253
	254	static struct platform_driver mmp_pcm_driver = {
	255	.driver = {
	256	.name = "mmp-pcm-audio",
7a824e21 ZG	257	},
	258
	259	.probe = mmp_pcm_probe,
7a824e21 ZG	260	};
	261
	262	module_platform_driver(mmp_pcm_driver);
	263
	264	MODULE_AUTHOR("Leo Yan <leoy@marvell.com>");
	265	MODULE_DESCRIPTION("MMP Soc Audio DMA module");
	266	MODULE_LICENSE("GPL");
e5b7d71a	267	MODULE_ALIAS("platform:mmp-pcm-audio");