[GitHub/mt8127/android_kernel_alcatel_ttab.git] / sound / soc / imx / imx-pcm-fiq.c

/*
 * imx-pcm-fiq.c  --  ALSA Soc Audio Layer
 *
 * Copyright 2009 Sascha Hauer <s.hauer@pengutronix.de>
 *
 * This code is based on code copyrighted by Freescale,
 * Liam Girdwood, Javier Martin and probably others.
 *
 *  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.
 */
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/slab.h>

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

#include <asm/fiq.h>

#include <mach/ssi.h>

#include "imx-ssi.h"

struct imx_pcm_runtime_data {
	int period;
	int periods;
	unsigned long offset;
	unsigned long last_offset;
	unsigned long size;
	struct hrtimer hrt;
	int poll_time_ns;
	struct snd_pcm_substream *substream;
	atomic_t running;
};

static enum hrtimer_restart snd_hrtimer_callback(struct hrtimer *hrt)
{
	struct imx_pcm_runtime_data *iprtd =
		container_of(hrt, struct imx_pcm_runtime_data, hrt);
	struct snd_pcm_substream *substream = iprtd->substream;
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct pt_regs regs;
	unsigned long delta;

	if (!atomic_read(&iprtd->running))
		return HRTIMER_NORESTART;

	get_fiq_regs(&regs);

	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
		iprtd->offset = regs.ARM_r8 & 0xffff;
	else
		iprtd->offset = regs.ARM_r9 & 0xffff;

	/* How much data have we transferred since the last period report? */
	if (iprtd->offset >= iprtd->last_offset)
		delta = iprtd->offset - iprtd->last_offset;
	else
		delta = runtime->buffer_size + iprtd->offset
			- iprtd->last_offset;

	/* If we've transferred at least a period then report it and
	 * reset our poll time */
	if (delta >= iprtd->period) {
		snd_pcm_period_elapsed(substream);
		iprtd->last_offset = iprtd->offset;
	}

	hrtimer_forward_now(hrt, ns_to_ktime(iprtd->poll_time_ns));

	return HRTIMER_RESTART;
}

static struct fiq_handler fh = {
	.name		= DRV_NAME,
};

static int snd_imx_pcm_hw_params(struct snd_pcm_substream *substream,
				struct snd_pcm_hw_params *params)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct imx_pcm_runtime_data *iprtd = runtime->private_data;

	iprtd->size = params_buffer_bytes(params);
	iprtd->periods = params_periods(params);
	iprtd->period = params_period_bytes(params) ;
	iprtd->offset = 0;
	iprtd->last_offset = 0;
	iprtd->poll_time_ns = 1000000000 / params_rate(params) *
				params_period_size(params);
	snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);

	return 0;
}

static int snd_imx_pcm_prepare(struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct imx_pcm_runtime_data *iprtd = runtime->private_data;
	struct pt_regs regs;

	get_fiq_regs(&regs);
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
		regs.ARM_r8 = (iprtd->period * iprtd->periods - 1) << 16;
	else
		regs.ARM_r9 = (iprtd->period * iprtd->periods - 1) << 16;

	set_fiq_regs(&regs);

	return 0;
}

static int fiq_enable;
static int imx_pcm_fiq;

static int snd_imx_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct imx_pcm_runtime_data *iprtd = runtime->private_data;

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
	case SNDRV_PCM_TRIGGER_RESUME:
	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
		atomic_set(&iprtd->running, 1);
		hrtimer_start(&iprtd->hrt, ns_to_ktime(iprtd->poll_time_ns),
		      HRTIMER_MODE_REL);
		if (++fiq_enable == 1)
			enable_fiq(imx_pcm_fiq);

		break;

	case SNDRV_PCM_TRIGGER_STOP:
	case SNDRV_PCM_TRIGGER_SUSPEND:
	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
		atomic_set(&iprtd->running, 0);

		if (--fiq_enable == 0)
			disable_fiq(imx_pcm_fiq);

		break;
	default:
		return -EINVAL;
	}

	return 0;
}

static snd_pcm_uframes_t snd_imx_pcm_pointer(struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct imx_pcm_runtime_data *iprtd = runtime->private_data;

	return bytes_to_frames(substream->runtime, iprtd->offset);
}

static struct snd_pcm_hardware snd_imx_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,
	.formats = SNDRV_PCM_FMTBIT_S16_LE,
	.rate_min = 8000,
	.channels_min = 2,
	.channels_max = 2,
	.buffer_bytes_max = IMX_SSI_DMABUF_SIZE,
	.period_bytes_min = 128,
	.period_bytes_max = 16 * 1024,
	.periods_min = 4,
	.periods_max = 255,
	.fifo_size = 0,
};

static int snd_imx_open(struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct imx_pcm_runtime_data *iprtd;
	int ret;

	iprtd = kzalloc(sizeof(*iprtd), GFP_KERNEL);
	if (iprtd == NULL)
		return -ENOMEM;
	runtime->private_data = iprtd;

	iprtd->substream = substream;

	atomic_set(&iprtd->running, 0);
	hrtimer_init(&iprtd->hrt, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
	iprtd->hrt.function = snd_hrtimer_callback;

	ret = snd_pcm_hw_constraint_integer(substream->runtime,
			SNDRV_PCM_HW_PARAM_PERIODS);
	if (ret < 0) {
		kfree(iprtd);
		return ret;
	}

	snd_soc_set_runtime_hwparams(substream, &snd_imx_hardware);
	return 0;
}

static int snd_imx_close(struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct imx_pcm_runtime_data *iprtd = runtime->private_data;

	hrtimer_cancel(&iprtd->hrt);

	kfree(iprtd);

	return 0;
}

static struct snd_pcm_ops imx_pcm_ops = {
	.open		= snd_imx_open,
	.close		= snd_imx_close,
	.ioctl		= snd_pcm_lib_ioctl,
	.hw_params	= snd_imx_pcm_hw_params,
	.prepare	= snd_imx_pcm_prepare,
	.trigger	= snd_imx_pcm_trigger,
	.pointer	= snd_imx_pcm_pointer,
	.mmap		= snd_imx_pcm_mmap,
};

static int ssi_irq = 0;

static int imx_pcm_fiq_new(struct snd_card *card, struct snd_soc_dai *dai,
	struct snd_pcm *pcm)
{
	int ret;

	ret = imx_pcm_new(card, dai, pcm);
	if (ret)
		return ret;

	if (dai->driver->playback.channels_min) {
		struct snd_pcm_substream *substream =
			pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream;
		struct snd_dma_buffer *buf = &substream->dma_buffer;

		imx_ssi_fiq_tx_buffer = (unsigned long)buf->area;
	}

	if (dai->driver->capture.channels_min) {
		struct snd_pcm_substream *substream =
			pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream;
		struct snd_dma_buffer *buf = &substream->dma_buffer;

		imx_ssi_fiq_rx_buffer = (unsigned long)buf->area;
	}

	set_fiq_handler(&imx_ssi_fiq_start,
		&imx_ssi_fiq_end - &imx_ssi_fiq_start);

	return 0;
}

static void imx_pcm_fiq_free(struct snd_pcm *pcm)
{
	mxc_set_irq_fiq(ssi_irq, 0);
	release_fiq(&fh);
	imx_pcm_free(pcm);
}

static struct snd_soc_platform_driver imx_soc_platform_fiq = {
	.ops		= &imx_pcm_ops,
	.pcm_new	= imx_pcm_fiq_new,
	.pcm_free	= imx_pcm_fiq_free,
};

static int __devinit imx_soc_platform_probe(struct platform_device *pdev)
{
	struct imx_ssi *ssi = platform_get_drvdata(pdev);
	int ret;

	ret = claim_fiq(&fh);
	if (ret) {
		dev_err(&pdev->dev, "failed to claim fiq: %d", ret);
		return ret;
	}

	mxc_set_irq_fiq(ssi->irq, 1);
	ssi_irq = ssi->irq;

	imx_pcm_fiq = ssi->irq;

	imx_ssi_fiq_base = (unsigned long)ssi->base;

	ssi->dma_params_tx.burstsize = 4;
	ssi->dma_params_rx.burstsize = 6;

	ret = snd_soc_register_platform(&pdev->dev, &imx_soc_platform_fiq);
	if (ret)
		goto failed_register;

	return 0;

failed_register:
	mxc_set_irq_fiq(ssi_irq, 0);
	release_fiq(&fh);

	return ret;
}

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

static struct platform_driver imx_pcm_driver = {
	.driver = {
			.name = "imx-fiq-pcm-audio",
			.owner = THIS_MODULE,
	},

	.probe = imx_soc_platform_probe,
	.remove = __devexit_p(imx_soc_platform_remove),
};

static int __init snd_imx_pcm_init(void)
{
	return platform_driver_register(&imx_pcm_driver);
}
module_init(snd_imx_pcm_init);

static void __exit snd_imx_pcm_exit(void)
{
	platform_driver_unregister(&imx_pcm_driver);
}
module_exit(snd_imx_pcm_exit);
Commit	Line	Data
8380222e SH	1	/*
	2	* imx-pcm-fiq.c -- ALSA Soc Audio Layer
	3	*
	4	* Copyright 2009 Sascha Hauer <s.hauer@pengutronix.de>
	5	*
	6	* This code is based on code copyrighted by Freescale,
	7	* Liam Girdwood, Javier Martin and probably others.
	8	*
	9	* This program is free software; you can redistribute it and/or modify it
	10	* under the terms of the GNU General Public License as published by the
	11	* Free Software Foundation; either version 2 of the License, or (at your
	12	* option) any later version.
	13	*/
	14	#include <linux/clk.h>
	15	#include <linux/delay.h>
	16	#include <linux/device.h>
	17	#include <linux/dma-mapping.h>
	18	#include <linux/init.h>
	19	#include <linux/interrupt.h>
	20	#include <linux/module.h>
	21	#include <linux/platform_device.h>
5a0e3ad6	22	#include <linux/slab.h>
8380222e SH	23
	24	#include <sound/core.h>
	25	#include <sound/initval.h>
	26	#include <sound/pcm.h>
	27	#include <sound/pcm_params.h>
	28	#include <sound/soc.h>
	29
	30	#include <asm/fiq.h>
	31
	32	#include <mach/ssi.h>
	33
	34	#include "imx-ssi.h"
	35
	36	struct imx_pcm_runtime_data {
	37	int period;
	38	int periods;
8380222e	39	unsigned long offset;
b4e82b5b	40	unsigned long last_offset;
8380222e	41	unsigned long size;
43a3cec0 SH	42	struct hrtimer hrt;
	43	int poll_time_ns;
	44	struct snd_pcm_substream *substream;
83926099	45	atomic_t running;
8380222e SH	46	};
8380222e SH	47
43a3cec0	48	static enum hrtimer_restart snd_hrtimer_callback(struct hrtimer *hrt)
b4e82b5b	49	{
43a3cec0 SH	50	struct imx_pcm_runtime_data *iprtd =
	51	container_of(hrt, struct imx_pcm_runtime_data, hrt);
	52	struct snd_pcm_substream *substream = iprtd->substream;
8380222e	53	struct snd_pcm_runtime *runtime = substream->runtime;
8380222e	54	struct pt_regs regs;
b4e82b5b	55	unsigned long delta;
8380222e	56
83926099 SH	57	if (!atomic_read(&iprtd->running))
	58	return HRTIMER_NORESTART;
	59
8380222e SH	60	get_fiq_regs(&regs);
	61
	62	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
	63	iprtd->offset = regs.ARM_r8 & 0xffff;
	64	else
	65	iprtd->offset = regs.ARM_r9 & 0xffff;
	66
b4e82b5b MB	67	/* How much data have we transferred since the last period report? */
	68	if (iprtd->offset >= iprtd->last_offset)
	69	delta = iprtd->offset - iprtd->last_offset;
	70	else
	71	delta = runtime->buffer_size + iprtd->offset
	72	- iprtd->last_offset;
	73
	74	/* If we've transferred at least a period then report it and
	75	* reset our poll time */
43a3cec0	76	if (delta >= iprtd->period) {
b4e82b5b MB	77	snd_pcm_period_elapsed(substream);
b4e82b5b MB	78	iprtd->last_offset = iprtd->offset;
b4e82b5b MB	79	}
b4e82b5b MB	80
43a3cec0	81	hrtimer_forward_now(hrt, ns_to_ktime(iprtd->poll_time_ns));
b4e82b5b	82
43a3cec0	83	return HRTIMER_RESTART;
8380222e SH	84	}
	85
	86	static struct fiq_handler fh = {
	87	.name = DRV_NAME,
	88	};
	89
	90	static int snd_imx_pcm_hw_params(struct snd_pcm_substream *substream,
	91	struct snd_pcm_hw_params *params)
	92	{
	93	struct snd_pcm_runtime *runtime = substream->runtime;
	94	struct imx_pcm_runtime_data *iprtd = runtime->private_data;
	95
	96	iprtd->size = params_buffer_bytes(params);
	97	iprtd->periods = params_periods(params);
b4e82b5b	98	iprtd->period = params_period_bytes(params) ;
8380222e	99	iprtd->offset = 0;
b4e82b5b	100	iprtd->last_offset = 0;
43a3cec0 SH	101	iprtd->poll_time_ns = 1000000000 / params_rate(params) *
43a3cec0 SH	102	params_period_size(params);
8380222e SH	103	snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
	104
	105	return 0;
	106	}
	107
	108	static int snd_imx_pcm_prepare(struct snd_pcm_substream *substream)
	109	{
	110	struct snd_pcm_runtime *runtime = substream->runtime;
	111	struct imx_pcm_runtime_data *iprtd = runtime->private_data;
	112	struct pt_regs regs;
	113
	114	get_fiq_regs(&regs);
	115	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
	116	regs.ARM_r8 = (iprtd->period * iprtd->periods - 1) << 16;
	117	else
	118	regs.ARM_r9 = (iprtd->period * iprtd->periods - 1) << 16;
	119
	120	set_fiq_regs(&regs);
	121
	122	return 0;
	123	}
	124
	125	static int fiq_enable;
	126	static int imx_pcm_fiq;
	127
	128	static int snd_imx_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
	129	{
	130	struct snd_pcm_runtime *runtime = substream->runtime;
	131	struct imx_pcm_runtime_data *iprtd = runtime->private_data;
	132
	133	switch (cmd) {
	134	case SNDRV_PCM_TRIGGER_START:
	135	case SNDRV_PCM_TRIGGER_RESUME:
	136	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
83926099	137	atomic_set(&iprtd->running, 1);
43a3cec0 SH	138	hrtimer_start(&iprtd->hrt, ns_to_ktime(iprtd->poll_time_ns),
43a3cec0 SH	139	HRTIMER_MODE_REL);
8380222e SH	140	if (++fiq_enable == 1)
	141	enable_fiq(imx_pcm_fiq);
	142
	143	break;
	144
	145	case SNDRV_PCM_TRIGGER_STOP:
	146	case SNDRV_PCM_TRIGGER_SUSPEND:
	147	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
83926099 SH	148	atomic_set(&iprtd->running, 0);
83926099 SH	149
8380222e SH	150	if (--fiq_enable == 0)
	151	disable_fiq(imx_pcm_fiq);
	152
8380222e SH	153	break;
	154	default:
	155	return -EINVAL;
	156	}
	157
	158	return 0;
	159	}
	160
	161	static snd_pcm_uframes_t snd_imx_pcm_pointer(struct snd_pcm_substream *substream)
	162	{
	163	struct snd_pcm_runtime *runtime = substream->runtime;
	164	struct imx_pcm_runtime_data *iprtd = runtime->private_data;
	165
	166	return bytes_to_frames(substream->runtime, iprtd->offset);
	167	}
	168
	169	static struct snd_pcm_hardware snd_imx_hardware = {
	170	.info = SNDRV_PCM_INFO_INTERLEAVED \|
	171	SNDRV_PCM_INFO_BLOCK_TRANSFER \|
	172	SNDRV_PCM_INFO_MMAP \|
	173	SNDRV_PCM_INFO_MMAP_VALID \|
	174	SNDRV_PCM_INFO_PAUSE \|
	175	SNDRV_PCM_INFO_RESUME,
	176	.formats = SNDRV_PCM_FMTBIT_S16_LE,
	177	.rate_min = 8000,
	178	.channels_min = 2,
	179	.channels_max = 2,
	180	.buffer_bytes_max = IMX_SSI_DMABUF_SIZE,
	181	.period_bytes_min = 128,
	182	.period_bytes_max = 16 * 1024,
565a79f7	183	.periods_min = 4,
8380222e SH	184	.periods_max = 255,
	185	.fifo_size = 0,
	186	};
	187
	188	static int snd_imx_open(struct snd_pcm_substream *substream)
	189	{
	190	struct snd_pcm_runtime *runtime = substream->runtime;
	191	struct imx_pcm_runtime_data *iprtd;
	192	int ret;
	193
	194	iprtd = kzalloc(sizeof(*iprtd), GFP_KERNEL);
50e8ce14 KV	195	if (iprtd == NULL)
50e8ce14 KV	196	return -ENOMEM;
8380222e SH	197	runtime->private_data = iprtd;
8380222e SH	198
43a3cec0 SH	199	iprtd->substream = substream;
43a3cec0 SH	200
83926099	201	atomic_set(&iprtd->running, 0);
43a3cec0 SH	202	hrtimer_init(&iprtd->hrt, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
43a3cec0 SH	203	iprtd->hrt.function = snd_hrtimer_callback;
8380222e SH	204
	205	ret = snd_pcm_hw_constraint_integer(substream->runtime,
	206	SNDRV_PCM_HW_PARAM_PERIODS);
50e8ce14 KV	207	if (ret < 0) {
50e8ce14 KV	208	kfree(iprtd);
8380222e	209	return ret;
50e8ce14	210	}
8380222e SH	211
	212	snd_soc_set_runtime_hwparams(substream, &snd_imx_hardware);
	213	return 0;
	214	}
	215
	216	static int snd_imx_close(struct snd_pcm_substream *substream)
	217	{
	218	struct snd_pcm_runtime *runtime = substream->runtime;
	219	struct imx_pcm_runtime_data *iprtd = runtime->private_data;
	220
43a3cec0 SH	221	hrtimer_cancel(&iprtd->hrt);
43a3cec0 SH	222
8380222e SH	223	kfree(iprtd);
	224
	225	return 0;
	226	}
	227
	228	static struct snd_pcm_ops imx_pcm_ops = {
	229	.open = snd_imx_open,
	230	.close = snd_imx_close,
	231	.ioctl = snd_pcm_lib_ioctl,
	232	.hw_params = snd_imx_pcm_hw_params,
	233	.prepare = snd_imx_pcm_prepare,
	234	.trigger = snd_imx_pcm_trigger,
	235	.pointer = snd_imx_pcm_pointer,
	236	.mmap = snd_imx_pcm_mmap,
	237	};
	238
f0fba2ad LG	239	static int ssi_irq = 0;
f0fba2ad LG	240
8380222e SH	241	static int imx_pcm_fiq_new(struct snd_card card, struct snd_soc_dai dai,
	242	struct snd_pcm *pcm)
	243	{
	244	int ret;
	245
	246	ret = imx_pcm_new(card, dai, pcm);
	247	if (ret)
	248	return ret;
	249
f0fba2ad	250	if (dai->driver->playback.channels_min) {
8380222e SH	251	struct snd_pcm_substream *substream =
	252	pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream;
	253	struct snd_dma_buffer *buf = &substream->dma_buffer;
	254
	255	imx_ssi_fiq_tx_buffer = (unsigned long)buf->area;
	256	}
	257
f0fba2ad	258	if (dai->driver->capture.channels_min) {
8380222e SH	259	struct snd_pcm_substream *substream =
	260	pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream;
	261	struct snd_dma_buffer *buf = &substream->dma_buffer;
	262
	263	imx_ssi_fiq_rx_buffer = (unsigned long)buf->area;
	264	}
	265
	266	set_fiq_handler(&imx_ssi_fiq_start,
	267	&imx_ssi_fiq_end - &imx_ssi_fiq_start);
	268
	269	return 0;
	270	}
	271
f0fba2ad LG	272	static void imx_pcm_fiq_free(struct snd_pcm *pcm)
	273	{
	274	mxc_set_irq_fiq(ssi_irq, 0);
	275	release_fiq(&fh);
	276	imx_pcm_free(pcm);
	277	}
	278
	279	static struct snd_soc_platform_driver imx_soc_platform_fiq = {
	280	.ops = &imx_pcm_ops,
8380222e	281	.pcm_new = imx_pcm_fiq_new,
f0fba2ad	282	.pcm_free = imx_pcm_fiq_free,
8380222e SH	283	};
8380222e SH	284
f0fba2ad	285	static int __devinit imx_soc_platform_probe(struct platform_device *pdev)
8380222e	286	{
f0fba2ad LG	287	struct imx_ssi *ssi = platform_get_drvdata(pdev);
f0fba2ad LG	288	int ret;
8380222e SH	289
	290	ret = claim_fiq(&fh);
	291	if (ret) {
	292	dev_err(&pdev->dev, "failed to claim fiq: %d", ret);
f0fba2ad	293	return ret;
8380222e SH	294	}
	295
	296	mxc_set_irq_fiq(ssi->irq, 1);
f0fba2ad	297	ssi_irq = ssi->irq;
8380222e SH	298
	299	imx_pcm_fiq = ssi->irq;
	300
	301	imx_ssi_fiq_base = (unsigned long)ssi->base;
	302
	303	ssi->dma_params_tx.burstsize = 4;
	304	ssi->dma_params_rx.burstsize = 6;
	305
f0fba2ad LG	306	ret = snd_soc_register_platform(&pdev->dev, &imx_soc_platform_fiq);
	307	if (ret)
	308	goto failed_register;
	309
	310	return 0;
	311
	312	failed_register:
	313	mxc_set_irq_fiq(ssi_irq, 0);
	314	release_fiq(&fh);
	315
	316	return ret;
8380222e SH	317	}
8380222e SH	318
f0fba2ad	319	static int __devexit imx_soc_platform_remove(struct platform_device *pdev)
8380222e	320	{
f0fba2ad LG	321	snd_soc_unregister_platform(&pdev->dev);
f0fba2ad LG	322	return 0;
8380222e SH	323	}
8380222e SH	324
f0fba2ad LG	325	static struct platform_driver imx_pcm_driver = {
	326	.driver = {
	327	.name = "imx-fiq-pcm-audio",
	328	.owner = THIS_MODULE,
	329	},
	330
	331	.probe = imx_soc_platform_probe,
	332	.remove = __devexit_p(imx_soc_platform_remove),
	333	};
	334
	335	static int __init snd_imx_pcm_init(void)
	336	{
	337	return platform_driver_register(&imx_pcm_driver);
	338	}
	339	module_init(snd_imx_pcm_init);
	340
	341	static void __exit snd_imx_pcm_exit(void)
	342	{
	343	platform_driver_unregister(&imx_pcm_driver);
	344	}
	345	module_exit(snd_imx_pcm_exit);