[deliverable/linux.git] / sound / soc / nuc900 / nuc900-pcm.c

/*
 * Copyright (c) 2010 Nuvoton technology corporation.
 *
 * Wan ZongShun <mcuos.com@gmail.com>
 *
 * 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;version 2 of the License.
 *
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/io.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 <mach/hardware.h>

#include "nuc900-audio.h"

static const struct snd_pcm_hardware nuc900_pcm_hardware = {
	.info			= SNDRV_PCM_INFO_INTERLEAVED |
					SNDRV_PCM_INFO_BLOCK_TRANSFER |
					SNDRV_PCM_INFO_MMAP |
					SNDRV_PCM_INFO_MMAP_VALID |
					SNDRV_PCM_INFO_PAUSE |
					SNDRV_PCM_INFO_RESUME,
	.buffer_bytes_max	= 4*1024,
	.period_bytes_min	= 1*1024,
	.period_bytes_max	= 4*1024,
	.periods_min		= 1,
	.periods_max		= 1024,
};

static int nuc900_dma_hw_params(struct snd_pcm_substream *substream,
	struct snd_pcm_hw_params *params)
{
	return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
}

static void nuc900_update_dma_register(struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct nuc900_audio *nuc900_audio = runtime->private_data;
	void __iomem *mmio_addr, *mmio_len;

	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
		mmio_addr = nuc900_audio->mmio + ACTL_PDSTB;
		mmio_len = nuc900_audio->mmio + ACTL_PDST_LENGTH;
	} else {
		mmio_addr = nuc900_audio->mmio + ACTL_RDSTB;
		mmio_len = nuc900_audio->mmio + ACTL_RDST_LENGTH;
	}

	AUDIO_WRITE(mmio_addr, runtime->dma_addr);
	AUDIO_WRITE(mmio_len, runtime->dma_bytes);
}

static void nuc900_dma_start(struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct nuc900_audio *nuc900_audio = runtime->private_data;
	unsigned long val;

	val = AUDIO_READ(nuc900_audio->mmio + ACTL_CON);
	val |= (T_DMA_IRQ | R_DMA_IRQ);
	AUDIO_WRITE(nuc900_audio->mmio + ACTL_CON, val);
}

static void nuc900_dma_stop(struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct nuc900_audio *nuc900_audio = runtime->private_data;
	unsigned long val;

	val = AUDIO_READ(nuc900_audio->mmio + ACTL_CON);
	val &= ~(T_DMA_IRQ | R_DMA_IRQ);
	AUDIO_WRITE(nuc900_audio->mmio + ACTL_CON, val);
}

static irqreturn_t nuc900_dma_interrupt(int irq, void *dev_id)
{
	struct snd_pcm_substream *substream = dev_id;
	struct nuc900_audio *nuc900_audio = substream->runtime->private_data;
	unsigned long val;

	spin_lock(&nuc900_audio->lock);

	val = AUDIO_READ(nuc900_audio->mmio + ACTL_CON);

	if (val & R_DMA_IRQ) {
		AUDIO_WRITE(nuc900_audio->mmio + ACTL_CON, val | R_DMA_IRQ);

		val = AUDIO_READ(nuc900_audio->mmio + ACTL_RSR);

		if (val & R_DMA_MIDDLE_IRQ) {
			val |= R_DMA_MIDDLE_IRQ;
			AUDIO_WRITE(nuc900_audio->mmio + ACTL_RSR, val);
		}

		if (val & R_DMA_END_IRQ) {
			val |= R_DMA_END_IRQ;
			AUDIO_WRITE(nuc900_audio->mmio + ACTL_RSR, val);
		}
	} else if (val & T_DMA_IRQ) {
		AUDIO_WRITE(nuc900_audio->mmio + ACTL_CON, val | T_DMA_IRQ);

		val = AUDIO_READ(nuc900_audio->mmio + ACTL_PSR);

		if (val & P_DMA_MIDDLE_IRQ) {
			val |= P_DMA_MIDDLE_IRQ;
			AUDIO_WRITE(nuc900_audio->mmio + ACTL_PSR, val);
		}

		if (val & P_DMA_END_IRQ) {
			val |= P_DMA_END_IRQ;
			AUDIO_WRITE(nuc900_audio->mmio + ACTL_PSR, val);
		}
	} else {
		dev_err(nuc900_audio->dev, "Wrong DMA interrupt status!\n");
		spin_unlock(&nuc900_audio->lock);
		return IRQ_HANDLED;
	}

	spin_unlock(&nuc900_audio->lock);

	snd_pcm_period_elapsed(substream);

	return IRQ_HANDLED;
}

static int nuc900_dma_hw_free(struct snd_pcm_substream *substream)
{
	snd_pcm_lib_free_pages(substream);
	return 0;
}

static int nuc900_dma_prepare(struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct nuc900_audio *nuc900_audio = runtime->private_data;
	unsigned long flags, val;
	int ret = 0;

	spin_lock_irqsave(&nuc900_audio->lock, flags);

	nuc900_update_dma_register(substream);

	val = AUDIO_READ(nuc900_audio->mmio + ACTL_RESET);

	switch (runtime->channels) {
	case 1:
		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
			val &= ~(PLAY_LEFT_CHNNEL | PLAY_RIGHT_CHNNEL);
			val |= PLAY_RIGHT_CHNNEL;
		} else {
			val &= ~(RECORD_LEFT_CHNNEL | RECORD_RIGHT_CHNNEL);
			val |= RECORD_RIGHT_CHNNEL;
		}
		AUDIO_WRITE(nuc900_audio->mmio + ACTL_RESET, val);
		break;
	case 2:
		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
			val |= (PLAY_LEFT_CHNNEL | PLAY_RIGHT_CHNNEL);
		else
			val |= (RECORD_LEFT_CHNNEL | RECORD_RIGHT_CHNNEL);
		AUDIO_WRITE(nuc900_audio->mmio + ACTL_RESET, val);
		break;
	default:
		ret = -EINVAL;
	}
	spin_unlock_irqrestore(&nuc900_audio->lock, flags);
	return ret;
}

static int nuc900_dma_trigger(struct snd_pcm_substream *substream, int cmd)
{
	int ret = 0;

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
	case SNDRV_PCM_TRIGGER_RESUME:
		nuc900_dma_start(substream);
		break;

	case SNDRV_PCM_TRIGGER_STOP:
	case SNDRV_PCM_TRIGGER_SUSPEND:
		nuc900_dma_stop(substream);
		break;

	default:
		ret = -EINVAL;
		break;
	}

	return ret;
}

static int nuc900_dma_getposition(struct snd_pcm_substream *substream,
					dma_addr_t *src, dma_addr_t *dst)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct nuc900_audio *nuc900_audio = runtime->private_data;

	if (src != NULL)
		*src = AUDIO_READ(nuc900_audio->mmio + ACTL_PDSTC);

	if (dst != NULL)
		*dst = AUDIO_READ(nuc900_audio->mmio + ACTL_RDSTC);

	return 0;
}

static snd_pcm_uframes_t nuc900_dma_pointer(struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	dma_addr_t src, dst;
	unsigned long res;

	nuc900_dma_getposition(substream, &src, &dst);

	if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
		res = dst - runtime->dma_addr;
	else
		res = src - runtime->dma_addr;

	return bytes_to_frames(substream->runtime, res);
}

static int nuc900_dma_open(struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct nuc900_audio *nuc900_audio;

	snd_soc_set_runtime_hwparams(substream, &nuc900_pcm_hardware);

	nuc900_audio = nuc900_ac97_data;

	if (request_irq(nuc900_audio->irq_num, nuc900_dma_interrupt,
			0, "nuc900-dma", substream))
		return -EBUSY;

	runtime->private_data = nuc900_audio;

	return 0;
}

static int nuc900_dma_close(struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct nuc900_audio *nuc900_audio = runtime->private_data;

	free_irq(nuc900_audio->irq_num, substream);

	return 0;
}

static int nuc900_dma_mmap(struct snd_pcm_substream *substream,
	struct vm_area_struct *vma)
{
	struct snd_pcm_runtime *runtime = substream->runtime;

	return dma_mmap_wc(substream->pcm->card->dev, vma, runtime->dma_area,
			   runtime->dma_addr, runtime->dma_bytes);
}

static struct snd_pcm_ops nuc900_dma_ops = {
	.open		= nuc900_dma_open,
	.close		= nuc900_dma_close,
	.ioctl		= snd_pcm_lib_ioctl,
	.hw_params	= nuc900_dma_hw_params,
	.hw_free	= nuc900_dma_hw_free,
	.prepare	= nuc900_dma_prepare,
	.trigger	= nuc900_dma_trigger,
	.pointer	= nuc900_dma_pointer,
	.mmap		= nuc900_dma_mmap,
};

static int nuc900_dma_new(struct snd_soc_pcm_runtime *rtd)
{
	struct snd_card *card = rtd->card->snd_card;
	struct snd_pcm *pcm = rtd->pcm;
	int ret;

	ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
	if (ret)
		return ret;

	snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
		card->dev, 4 * 1024, (4 * 1024) - 1);

	return 0;
}

static struct snd_soc_platform_driver nuc900_soc_platform = {
	.ops		= &nuc900_dma_ops,
	.pcm_new	= nuc900_dma_new,
};

static int nuc900_soc_platform_probe(struct platform_device *pdev)
{
	return devm_snd_soc_register_platform(&pdev->dev, &nuc900_soc_platform);
}

static struct platform_driver nuc900_pcm_driver = {
	.driver = {
			.name = "nuc900-pcm-audio",
	},

	.probe = nuc900_soc_platform_probe,
};

module_platform_driver(nuc900_pcm_driver);

MODULE_AUTHOR("Wan ZongShun, <mcuos.com@gmail.com>");
MODULE_DESCRIPTION("nuc900 Audio DMA module");
MODULE_LICENSE("GPL");
Commit	Line	Data
1082e270 WZ	1	/*
	2	* Copyright (c) 2010 Nuvoton technology corporation.
	3	*
	4	* Wan ZongShun <mcuos.com@gmail.com>
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation;version 2 of the License.
	9	*
	10	*/
	11
	12	#include <linux/module.h>
	13	#include <linux/init.h>
	14	#include <linux/io.h>
	15	#include <linux/platform_device.h>
	16	#include <linux/slab.h>
	17	#include <linux/dma-mapping.h>
	18
	19	#include <sound/core.h>
	20	#include <sound/pcm.h>
	21	#include <sound/pcm_params.h>
	22	#include <sound/soc.h>
	23
	24	#include <mach/hardware.h>
	25
019afb58	26	#include "nuc900-audio.h"
1082e270 WZ	27
	28	static const struct snd_pcm_hardware nuc900_pcm_hardware = {
	29	.info = SNDRV_PCM_INFO_INTERLEAVED \|
	30	SNDRV_PCM_INFO_BLOCK_TRANSFER \|
	31	SNDRV_PCM_INFO_MMAP \|
	32	SNDRV_PCM_INFO_MMAP_VALID \|
	33	SNDRV_PCM_INFO_PAUSE \|
	34	SNDRV_PCM_INFO_RESUME,
1082e270 WZ	35	.buffer_bytes_max = 4*1024,
	36	.period_bytes_min = 1*1024,
	37	.period_bytes_max = 4*1024,
	38	.periods_min = 1,
	39	.periods_max = 1024,
	40	};
	41
	42	static int nuc900_dma_hw_params(struct snd_pcm_substream *substream,
	43	struct snd_pcm_hw_params *params)
	44	{
fa41181f	45	return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
1082e270 WZ	46	}
1082e270 WZ	47
fa41181f	48	static void nuc900_update_dma_register(struct snd_pcm_substream *substream)
1082e270 WZ	49	{
	50	struct snd_pcm_runtime *runtime = substream->runtime;
	51	struct nuc900_audio *nuc900_audio = runtime->private_data;
	52	void __iomem mmio_addr, mmio_len;
	53
018334c0	54	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1082e270 WZ	55	mmio_addr = nuc900_audio->mmio + ACTL_PDSTB;
	56	mmio_len = nuc900_audio->mmio + ACTL_PDST_LENGTH;
	57	} else {
	58	mmio_addr = nuc900_audio->mmio + ACTL_RDSTB;
	59	mmio_len = nuc900_audio->mmio + ACTL_RDST_LENGTH;
	60	}
	61
fa41181f LPC	62	AUDIO_WRITE(mmio_addr, runtime->dma_addr);
fa41181f LPC	63	AUDIO_WRITE(mmio_len, runtime->dma_bytes);
1082e270 WZ	64	}
	65
	66	static void nuc900_dma_start(struct snd_pcm_substream *substream)
	67	{
	68	struct snd_pcm_runtime *runtime = substream->runtime;
	69	struct nuc900_audio *nuc900_audio = runtime->private_data;
	70	unsigned long val;
	71
	72	val = AUDIO_READ(nuc900_audio->mmio + ACTL_CON);
	73	val \|= (T_DMA_IRQ \| R_DMA_IRQ);
	74	AUDIO_WRITE(nuc900_audio->mmio + ACTL_CON, val);
	75	}
	76
	77	static void nuc900_dma_stop(struct snd_pcm_substream *substream)
	78	{
	79	struct snd_pcm_runtime *runtime = substream->runtime;
	80	struct nuc900_audio *nuc900_audio = runtime->private_data;
	81	unsigned long val;
	82
	83	val = AUDIO_READ(nuc900_audio->mmio + ACTL_CON);
	84	val &= ~(T_DMA_IRQ \| R_DMA_IRQ);
	85	AUDIO_WRITE(nuc900_audio->mmio + ACTL_CON, val);
	86	}
	87
	88	static irqreturn_t nuc900_dma_interrupt(int irq, void *dev_id)
	89	{
	90	struct snd_pcm_substream *substream = dev_id;
	91	struct nuc900_audio *nuc900_audio = substream->runtime->private_data;
	92	unsigned long val;
	93
	94	spin_lock(&nuc900_audio->lock);
	95
	96	val = AUDIO_READ(nuc900_audio->mmio + ACTL_CON);
	97
	98	if (val & R_DMA_IRQ) {
	99	AUDIO_WRITE(nuc900_audio->mmio + ACTL_CON, val \| R_DMA_IRQ);
	100
	101	val = AUDIO_READ(nuc900_audio->mmio + ACTL_RSR);
	102
	103	if (val & R_DMA_MIDDLE_IRQ) {
	104	val \|= R_DMA_MIDDLE_IRQ;
	105	AUDIO_WRITE(nuc900_audio->mmio + ACTL_RSR, val);
	106	}
	107
	108	if (val & R_DMA_END_IRQ) {
	109	val \|= R_DMA_END_IRQ;
	110	AUDIO_WRITE(nuc900_audio->mmio + ACTL_RSR, val);
	111	}
	112	} else if (val & T_DMA_IRQ) {
	113	AUDIO_WRITE(nuc900_audio->mmio + ACTL_CON, val \| T_DMA_IRQ);
	114
	115	val = AUDIO_READ(nuc900_audio->mmio + ACTL_PSR);
	116
	117	if (val & P_DMA_MIDDLE_IRQ) {
	118	val \|= P_DMA_MIDDLE_IRQ;
	119	AUDIO_WRITE(nuc900_audio->mmio + ACTL_PSR, val);
	120	}
	121
	122	if (val & P_DMA_END_IRQ) {
	123	val \|= P_DMA_END_IRQ;
	124	AUDIO_WRITE(nuc900_audio->mmio + ACTL_PSR, val);
	125	}
	126	} else {
	127	dev_err(nuc900_audio->dev, "Wrong DMA interrupt status!\n");
128	spin_unlock(&nuc900_audio->lock);
129	return IRQ_HANDLED;
130	}
131
132	spin_unlock(&nuc900_audio->lock);
133
134	snd_pcm_period_elapsed(substream);
135
136	return IRQ_HANDLED;
137	}
138
139	static int nuc900_dma_hw_free(struct snd_pcm_substream *substream)
140	{
141	snd_pcm_lib_free_pages(substream);
142	return 0;
143	}
144
145	static int nuc900_dma_prepare(struct snd_pcm_substream *substream)
146	{
147	struct snd_pcm_runtime *runtime = substream->runtime;
148	struct nuc900_audio *nuc900_audio = runtime->private_data;
018334c0	149	unsigned long flags, val;
3f1af9d2	150	int ret = 0;
1082e270 WZ	151
	152	spin_lock_irqsave(&nuc900_audio->lock, flags);
	153
fa41181f	154	nuc900_update_dma_register(substream);
1082e270 WZ	155
	156	val = AUDIO_READ(nuc900_audio->mmio + ACTL_RESET);
	157
	158	switch (runtime->channels) {
	159	case 1:
018334c0	160	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1082e270 WZ	161	val &= ~(PLAY_LEFT_CHNNEL \| PLAY_RIGHT_CHNNEL);
	162	val \|= PLAY_RIGHT_CHNNEL;
	163	} else {
	164	val &= ~(RECORD_LEFT_CHNNEL \| RECORD_RIGHT_CHNNEL);
	165	val \|= RECORD_RIGHT_CHNNEL;
	166	}
	167	AUDIO_WRITE(nuc900_audio->mmio + ACTL_RESET, val);
	168	break;
	169	case 2:
018334c0	170	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1082e270 WZ	171	val \|= (PLAY_LEFT_CHNNEL \| PLAY_RIGHT_CHNNEL);
	172	else
	173	val \|= (RECORD_LEFT_CHNNEL \| RECORD_RIGHT_CHNNEL);
	174	AUDIO_WRITE(nuc900_audio->mmio + ACTL_RESET, val);
	175	break;
	176	default:
3f1af9d2	177	ret = -EINVAL;
1082e270 WZ	178	}
1082e270 WZ	179	spin_unlock_irqrestore(&nuc900_audio->lock, flags);
3f1af9d2	180	return ret;
1082e270 WZ	181	}
	182
	183	static int nuc900_dma_trigger(struct snd_pcm_substream *substream, int cmd)
	184	{
	185	int ret = 0;
	186
	187	switch (cmd) {
	188	case SNDRV_PCM_TRIGGER_START:
	189	case SNDRV_PCM_TRIGGER_RESUME:
	190	nuc900_dma_start(substream);
	191	break;
	192
	193	case SNDRV_PCM_TRIGGER_STOP:
	194	case SNDRV_PCM_TRIGGER_SUSPEND:
	195	nuc900_dma_stop(substream);
	196	break;
	197
	198	default:
	199	ret = -EINVAL;
	200	break;
	201	}
	202
	203	return ret;
	204	}
	205
49acf73b	206	static int nuc900_dma_getposition(struct snd_pcm_substream *substream,
1082e270 WZ	207	dma_addr_t src, dma_addr_t dst)
	208	{
	209	struct snd_pcm_runtime *runtime = substream->runtime;
	210	struct nuc900_audio *nuc900_audio = runtime->private_data;
	211
	212	if (src != NULL)
	213	*src = AUDIO_READ(nuc900_audio->mmio + ACTL_PDSTC);
	214
	215	if (dst != NULL)
	216	*dst = AUDIO_READ(nuc900_audio->mmio + ACTL_RDSTC);
	217
	218	return 0;
	219	}
	220
	221	static snd_pcm_uframes_t nuc900_dma_pointer(struct snd_pcm_substream *substream)
	222	{
	223	struct snd_pcm_runtime *runtime = substream->runtime;
	224	dma_addr_t src, dst;
	225	unsigned long res;
	226
	227	nuc900_dma_getposition(substream, &src, &dst);
	228
	229	if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
	230	res = dst - runtime->dma_addr;
	231	else
	232	res = src - runtime->dma_addr;
	233
	234	return bytes_to_frames(substream->runtime, res);
	235	}
	236
	237	static int nuc900_dma_open(struct snd_pcm_substream *substream)
	238	{
	239	struct snd_pcm_runtime *runtime = substream->runtime;
	240	struct nuc900_audio *nuc900_audio;
	241
	242	snd_soc_set_runtime_hwparams(substream, &nuc900_pcm_hardware);
	243
	244	nuc900_audio = nuc900_ac97_data;
	245
	246	if (request_irq(nuc900_audio->irq_num, nuc900_dma_interrupt,
88e24c3a	247	0, "nuc900-dma", substream))
1082e270 WZ	248	return -EBUSY;
	249
	250	runtime->private_data = nuc900_audio;
	251
	252	return 0;
	253	}
	254
	255	static int nuc900_dma_close(struct snd_pcm_substream *substream)
	256	{
	257	struct snd_pcm_runtime *runtime = substream->runtime;
	258	struct nuc900_audio *nuc900_audio = runtime->private_data;
	259
	260	free_irq(nuc900_audio->irq_num, substream);
	261
	262	return 0;
	263	}
	264
	265	static int nuc900_dma_mmap(struct snd_pcm_substream *substream,
	266	struct vm_area_struct *vma)
	267	{
	268	struct snd_pcm_runtime *runtime = substream->runtime;
	269
f6e45661 LR	270	return dma_mmap_wc(substream->pcm->card->dev, vma, runtime->dma_area,
f6e45661 LR	271	runtime->dma_addr, runtime->dma_bytes);
1082e270 WZ	272	}
	273
	274	static struct snd_pcm_ops nuc900_dma_ops = {
	275	.open = nuc900_dma_open,
	276	.close = nuc900_dma_close,
	277	.ioctl = snd_pcm_lib_ioctl,
	278	.hw_params = nuc900_dma_hw_params,
	279	.hw_free = nuc900_dma_hw_free,
	280	.prepare = nuc900_dma_prepare,
	281	.trigger = nuc900_dma_trigger,
	282	.pointer = nuc900_dma_pointer,
	283	.mmap = nuc900_dma_mmap,
	284	};
	285
552d1ef6	286	static int nuc900_dma_new(struct snd_soc_pcm_runtime *rtd)
1082e270	287	{
552d1ef6	288	struct snd_card *card = rtd->card->snd_card;
552d1ef6	289	struct snd_pcm *pcm = rtd->pcm;
c9bd5e69	290	int ret;
552d1ef6	291
c9bd5e69 RK	292	ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
	293	if (ret)
	294	return ret;
1082e270 WZ	295
	296	snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
	297	card->dev, 4 * 1024, (4 * 1024) - 1);
	298
	299	return 0;
	300	}
	301
f0fba2ad LG	302	static struct snd_soc_platform_driver nuc900_soc_platform = {
f0fba2ad LG	303	.ops = &nuc900_dma_ops,
1082e270	304	.pcm_new = nuc900_dma_new,
a7a9820b	305	};
1082e270	306
ce69ace5	307	static int nuc900_soc_platform_probe(struct platform_device *pdev)
1082e270	308	{
d5f1117f	309	return devm_snd_soc_register_platform(&pdev->dev, &nuc900_soc_platform);
1082e270 WZ	310	}
1082e270 WZ	311
f0fba2ad LG	312	static struct platform_driver nuc900_pcm_driver = {
	313	.driver = {
	314	.name = "nuc900-pcm-audio",
f0fba2ad LG	315	},
	316
	317	.probe = nuc900_soc_platform_probe,
f0fba2ad LG	318	};
f0fba2ad LG	319
d0efa6a2	320	module_platform_driver(nuc900_pcm_driver);
1082e270 WZ	321
	322	MODULE_AUTHOR("Wan ZongShun, <mcuos.com@gmail.com>");
	323	MODULE_DESCRIPTION("nuc900 Audio DMA module");
	324	MODULE_LICENSE("GPL");