[deliverable/linux.git] / sound / soc / au1x / i2sc.c

/*
 * Au1000/Au1500/Au1100 I2S controller driver for ASoC
 *
 * (c) 2011 Manuel Lauss <manuel.lauss@googlemail.com>
 *
 * Note: clock supplied to the I2S controller must be 256x samplerate.
 */

#include <linux/init.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/suspend.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/initval.h>
#include <sound/soc.h>
#include <asm/mach-au1x00/au1000.h>

#include "psc.h"

#define I2S_RXTX	0x00
#define I2S_CFG		0x04
#define I2S_ENABLE	0x08

#define CFG_XU		(1 << 25)	/* tx underflow */
#define CFG_XO		(1 << 24)
#define CFG_RU		(1 << 23)
#define CFG_RO		(1 << 22)
#define CFG_TR		(1 << 21)
#define CFG_TE		(1 << 20)
#define CFG_TF		(1 << 19)
#define CFG_RR		(1 << 18)
#define CFG_RF		(1 << 17)
#define CFG_ICK		(1 << 12)	/* clock invert */
#define CFG_PD		(1 << 11)	/* set to make I2SDIO INPUT */
#define CFG_LB		(1 << 10)	/* loopback */
#define CFG_IC		(1 << 9)	/* word select invert */
#define CFG_FM_I2S	(0 << 7)	/* I2S format */
#define CFG_FM_LJ	(1 << 7)	/* left-justified */
#define CFG_FM_RJ	(2 << 7)	/* right-justified */
#define CFG_FM_MASK	(3 << 7)
#define CFG_TN		(1 << 6)	/* tx fifo en */
#define CFG_RN		(1 << 5)	/* rx fifo en */
#define CFG_SZ_8	(0x08)
#define CFG_SZ_16	(0x10)
#define CFG_SZ_18	(0x12)
#define CFG_SZ_20	(0x14)
#define CFG_SZ_24	(0x18)
#define CFG_SZ_MASK	(0x1f)
#define EN_D		(1 << 1)	/* DISable */
#define EN_CE		(1 << 0)	/* clock enable */

/* only limited by clock generator and board design */
#define AU1XI2SC_RATES \
	SNDRV_PCM_RATE_CONTINUOUS

#define AU1XI2SC_FMTS \
	(SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U8 |		\
	SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE |	\
	SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE |	\
	SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_U18_3LE |	\
	SNDRV_PCM_FMTBIT_S18_3BE | SNDRV_PCM_FMTBIT_U18_3BE |	\
	SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_U20_3LE |	\
	SNDRV_PCM_FMTBIT_S20_3BE | SNDRV_PCM_FMTBIT_U20_3BE |	\
	SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE |	\
	SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE |	\
	0)

static inline unsigned long RD(struct au1xpsc_audio_data *ctx, int reg)
{
	return __raw_readl(ctx->mmio + reg);
}

static inline void WR(struct au1xpsc_audio_data *ctx, int reg, unsigned long v)
{
	__raw_writel(v, ctx->mmio + reg);
	wmb();
}

static int au1xi2s_set_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt)
{
	struct au1xpsc_audio_data *ctx = snd_soc_dai_get_drvdata(cpu_dai);
	unsigned long c;
	int ret;

	ret = -EINVAL;
	c = ctx->cfg;

	c &= ~CFG_FM_MASK;
	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	case SND_SOC_DAIFMT_I2S:
		c |= CFG_FM_I2S;
		break;
	case SND_SOC_DAIFMT_MSB:
		c |= CFG_FM_RJ;
		break;
	case SND_SOC_DAIFMT_LSB:
		c |= CFG_FM_LJ;
		break;
	default:
		goto out;
	}

	c &= ~(CFG_IC | CFG_ICK);		/* IB-IF */
	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
	case SND_SOC_DAIFMT_NB_NF:
		c |= CFG_IC | CFG_ICK;
		break;
	case SND_SOC_DAIFMT_NB_IF:
		c |= CFG_IC;
		break;
	case SND_SOC_DAIFMT_IB_NF:
		c |= CFG_ICK;
		break;
	case SND_SOC_DAIFMT_IB_IF:
		break;
	default:
		goto out;
	}

	/* I2S controller only supports master */
	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
	case SND_SOC_DAIFMT_CBS_CFS:	/* CODEC slave */
		break;
	default:
		goto out;
	}

	ret = 0;
	ctx->cfg = c;
out:
	return ret;
}

static int au1xi2s_trigger(struct snd_pcm_substream *substream,
			   int cmd, struct snd_soc_dai *dai)
{
	struct au1xpsc_audio_data *ctx = snd_soc_dai_get_drvdata(dai);
	int stype = SUBSTREAM_TYPE(substream);

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
	case SNDRV_PCM_TRIGGER_RESUME:
		/* power up */
		WR(ctx, I2S_ENABLE, EN_D | EN_CE);
		WR(ctx, I2S_ENABLE, EN_CE);
		ctx->cfg |= (stype == PCM_TX) ? CFG_TN : CFG_RN;
		WR(ctx, I2S_CFG, ctx->cfg);
		break;
	case SNDRV_PCM_TRIGGER_STOP:
	case SNDRV_PCM_TRIGGER_SUSPEND:
		ctx->cfg &= ~((stype == PCM_TX) ? CFG_TN : CFG_RN);
		WR(ctx, I2S_CFG, ctx->cfg);
		WR(ctx, I2S_ENABLE, EN_D);		/* power off */
		break;
	default:
		return -EINVAL;
	}

	return 0;
}

static unsigned long msbits_to_reg(int msbits)
{
	switch (msbits) {
	case 8:
		return CFG_SZ_8;
	case 16:
		return CFG_SZ_16;
	case 18:
		return CFG_SZ_18;
	case 20:
		return CFG_SZ_20;
	case 24:
		return CFG_SZ_24;
	}
	return 0;
}

static int au1xi2s_hw_params(struct snd_pcm_substream *substream,
			     struct snd_pcm_hw_params *params,
			     struct snd_soc_dai *dai)
{
	struct au1xpsc_audio_data *ctx = snd_soc_dai_get_drvdata(dai);
	unsigned long v;

	v = msbits_to_reg(params->msbits);
	if (!v)
		return -EINVAL;

	ctx->cfg &= ~CFG_SZ_MASK;
	ctx->cfg |= v;
	return 0;
}

static int au1xi2s_startup(struct snd_pcm_substream *substream,
			   struct snd_soc_dai *dai)
{
	struct au1xpsc_audio_data *ctx = snd_soc_dai_get_drvdata(dai);
	snd_soc_dai_set_dma_data(dai, substream, &ctx->dmaids[0]);
	return 0;
}

static const struct snd_soc_dai_ops au1xi2s_dai_ops = {
	.startup	= au1xi2s_startup,
	.trigger	= au1xi2s_trigger,
	.hw_params	= au1xi2s_hw_params,
	.set_fmt	= au1xi2s_set_fmt,
};

static struct snd_soc_dai_driver au1xi2s_dai_driver = {
	.symmetric_rates	= 1,
	.playback = {
		.rates		= AU1XI2SC_RATES,
		.formats	= AU1XI2SC_FMTS,
		.channels_min	= 2,
		.channels_max	= 2,
	},
	.capture = {
		.rates		= AU1XI2SC_RATES,
		.formats	= AU1XI2SC_FMTS,
		.channels_min	= 2,
		.channels_max	= 2,
	},
	.ops = &au1xi2s_dai_ops,
};

static int __devinit au1xi2s_drvprobe(struct platform_device *pdev)
{
	int ret;
	struct resource *iores, *dmares;
	struct au1xpsc_audio_data *ctx;

	ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
	if (!ctx)
		return -ENOMEM;

	iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!iores) {
		ret = -ENODEV;
		goto out0;
	}

	ret = -EBUSY;
	if (!request_mem_region(iores->start, resource_size(iores),
				pdev->name))
		goto out0;

	ctx->mmio = ioremap_nocache(iores->start, resource_size(iores));
	if (!ctx->mmio)
		goto out1;

	dmares = platform_get_resource(pdev, IORESOURCE_DMA, 0);
	if (!dmares)
		goto out2;
	ctx->dmaids[SNDRV_PCM_STREAM_PLAYBACK] = dmares->start;

	dmares = platform_get_resource(pdev, IORESOURCE_DMA, 1);
	if (!dmares)
		goto out2;
	ctx->dmaids[SNDRV_PCM_STREAM_CAPTURE] = dmares->start;

	platform_set_drvdata(pdev, ctx);

	ret = snd_soc_register_dai(&pdev->dev, &au1xi2s_dai_driver);
	if (ret)
		goto out2;

	return 0;

out2:
	iounmap(ctx->mmio);
out1:
	release_mem_region(iores->start, resource_size(iores));
out0:
	kfree(ctx);
	return ret;
}

static int __devexit au1xi2s_drvremove(struct platform_device *pdev)
{
	struct au1xpsc_audio_data *ctx = platform_get_drvdata(pdev);
	struct resource *r = platform_get_resource(pdev, IORESOURCE_MEM, 0);

	snd_soc_unregister_dai(&pdev->dev);

	WR(ctx, I2S_ENABLE, EN_D);	/* clock off, disable */

	iounmap(ctx->mmio);
	release_mem_region(r->start, resource_size(r));
	kfree(ctx);

	return 0;
}

#ifdef CONFIG_PM
static int au1xi2s_drvsuspend(struct device *dev)
{
	struct au1xpsc_audio_data *ctx = dev_get_drvdata(dev);

	WR(ctx, I2S_ENABLE, EN_D);	/* clock off, disable */

	return 0;
}

static int au1xi2s_drvresume(struct device *dev)
{
	return 0;
}

static const struct dev_pm_ops au1xi2sc_pmops = {
	.suspend	= au1xi2s_drvsuspend,
	.resume		= au1xi2s_drvresume,
};

#define AU1XI2SC_PMOPS (&au1xi2sc_pmops)

#else

#define AU1XI2SC_PMOPS NULL

#endif

static struct platform_driver au1xi2s_driver = {
	.driver	= {
		.name	= "alchemy-i2sc",
		.owner	= THIS_MODULE,
		.pm	= AU1XI2SC_PMOPS,
	},
	.probe		= au1xi2s_drvprobe,
	.remove		= __devexit_p(au1xi2s_drvremove),
};

static int __init au1xi2s_load(void)
{
	return platform_driver_register(&au1xi2s_driver);
}

static void __exit au1xi2s_unload(void)
{
	platform_driver_unregister(&au1xi2s_driver);
}

module_init(au1xi2s_load);
module_exit(au1xi2s_unload);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Au1000/1500/1100 I2S ASoC driver");
MODULE_AUTHOR("Manuel Lauss");
Commit	Line	Data
b3c70c9e ML	1	/*
	2	* Au1000/Au1500/Au1100 I2S controller driver for ASoC
	3	*
	4	* (c) 2011 Manuel Lauss <manuel.lauss@googlemail.com>
	5	*
	6	* Note: clock supplied to the I2S controller must be 256x samplerate.
	7	*/
	8
	9	#include <linux/init.h>
	10	#include <linux/module.h>
	11	#include <linux/slab.h>
	12	#include <linux/suspend.h>
	13	#include <sound/core.h>
	14	#include <sound/pcm.h>
	15	#include <sound/initval.h>
	16	#include <sound/soc.h>
	17	#include <asm/mach-au1x00/au1000.h>
	18
	19	#include "psc.h"
	20
	21	#define I2S_RXTX 0x00
	22	#define I2S_CFG 0x04
	23	#define I2S_ENABLE 0x08
	24
	25	#define CFG_XU (1 << 25) /* tx underflow */
	26	#define CFG_XO (1 << 24)
	27	#define CFG_RU (1 << 23)
	28	#define CFG_RO (1 << 22)
	29	#define CFG_TR (1 << 21)
	30	#define CFG_TE (1 << 20)
	31	#define CFG_TF (1 << 19)
	32	#define CFG_RR (1 << 18)
	33	#define CFG_RF (1 << 17)
	34	#define CFG_ICK (1 << 12) /* clock invert */
	35	#define CFG_PD (1 << 11) /* set to make I2SDIO INPUT */
	36	#define CFG_LB (1 << 10) /* loopback */
	37	#define CFG_IC (1 << 9) /* word select invert */
	38	#define CFG_FM_I2S (0 << 7) /* I2S format */
	39	#define CFG_FM_LJ (1 << 7) /* left-justified */
	40	#define CFG_FM_RJ (2 << 7) /* right-justified */
	41	#define CFG_FM_MASK (3 << 7)
	42	#define CFG_TN (1 << 6) /* tx fifo en */
	43	#define CFG_RN (1 << 5) /* rx fifo en */
	44	#define CFG_SZ_8 (0x08)
	45	#define CFG_SZ_16 (0x10)
	46	#define CFG_SZ_18 (0x12)
	47	#define CFG_SZ_20 (0x14)
	48	#define CFG_SZ_24 (0x18)
	49	#define CFG_SZ_MASK (0x1f)
	50	#define EN_D (1 << 1) /* DISable */
	51	#define EN_CE (1 << 0) /* clock enable */
	52
	53	/* only limited by clock generator and board design */
	54	#define AU1XI2SC_RATES \
	55	SNDRV_PCM_RATE_CONTINUOUS
	56
	57	#define AU1XI2SC_FMTS \
	58	(SNDRV_PCM_FMTBIT_S8 \| SNDRV_PCM_FMTBIT_U8 \| \
	59	SNDRV_PCM_FMTBIT_S16_LE \| SNDRV_PCM_FMTBIT_S16_BE \| \
	60	SNDRV_PCM_FMTBIT_U16_LE \| SNDRV_PCM_FMTBIT_U16_BE \| \
	61	SNDRV_PCM_FMTBIT_S18_3LE \| SNDRV_PCM_FMTBIT_U18_3LE \| \
	62	SNDRV_PCM_FMTBIT_S18_3BE \| SNDRV_PCM_FMTBIT_U18_3BE \| \
	63	SNDRV_PCM_FMTBIT_S20_3LE \| SNDRV_PCM_FMTBIT_U20_3LE \| \
	64	SNDRV_PCM_FMTBIT_S20_3BE \| SNDRV_PCM_FMTBIT_U20_3BE \| \
65	SNDRV_PCM_FMTBIT_S24_LE \| SNDRV_PCM_FMTBIT_S24_BE \| \
66	SNDRV_PCM_FMTBIT_U24_LE \| SNDRV_PCM_FMTBIT_U24_BE \| \
67	0)
68
69	static inline unsigned long RD(struct au1xpsc_audio_data *ctx, int reg)
70	{
71	return __raw_readl(ctx->mmio + reg);
72	}
73
74	static inline void WR(struct au1xpsc_audio_data *ctx, int reg, unsigned long v)
75	{
76	__raw_writel(v, ctx->mmio + reg);
77	wmb();
78	}
79
80	static int au1xi2s_set_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt)
81	{
82	struct au1xpsc_audio_data *ctx = snd_soc_dai_get_drvdata(cpu_dai);
83	unsigned long c;
84	int ret;
85
86	ret = -EINVAL;
87	c = ctx->cfg;
88
89	c &= ~CFG_FM_MASK;
90	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
91	case SND_SOC_DAIFMT_I2S:
92	c \|= CFG_FM_I2S;
93	break;
94	case SND_SOC_DAIFMT_MSB:
95	c \|= CFG_FM_RJ;
96	break;
97	case SND_SOC_DAIFMT_LSB:
98	c \|= CFG_FM_LJ;
99	break;
100	default:
101	goto out;
102	}
103
104	c &= ~(CFG_IC \| CFG_ICK); /* IB-IF */
105	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
106	case SND_SOC_DAIFMT_NB_NF:
107	c \|= CFG_IC \| CFG_ICK;
108	break;
109	case SND_SOC_DAIFMT_NB_IF:
110	c \|= CFG_IC;
111	break;
112	case SND_SOC_DAIFMT_IB_NF:
113	c \|= CFG_ICK;
114	break;
115	case SND_SOC_DAIFMT_IB_IF:
116	break;
117	default:
118	goto out;
119	}
120
121	/* I2S controller only supports master */
122	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
123	case SND_SOC_DAIFMT_CBS_CFS: /* CODEC slave */
124	break;
125	default:
126	goto out;
127	}
128
129	ret = 0;
130	ctx->cfg = c;
131	out:
132	return ret;
133	}
134
135	static int au1xi2s_trigger(struct snd_pcm_substream *substream,
136	int cmd, struct snd_soc_dai *dai)
137	{
138	struct au1xpsc_audio_data *ctx = snd_soc_dai_get_drvdata(dai);
139	int stype = SUBSTREAM_TYPE(substream);
140
141	switch (cmd) {
142	case SNDRV_PCM_TRIGGER_START:
143	case SNDRV_PCM_TRIGGER_RESUME:
144	/* power up */
145	WR(ctx, I2S_ENABLE, EN_D \| EN_CE);
146	WR(ctx, I2S_ENABLE, EN_CE);
147	ctx->cfg \|= (stype == PCM_TX) ? CFG_TN : CFG_RN;
148	WR(ctx, I2S_CFG, ctx->cfg);
149	break;
150	case SNDRV_PCM_TRIGGER_STOP:
151	case SNDRV_PCM_TRIGGER_SUSPEND:
152	ctx->cfg &= ~((stype == PCM_TX) ? CFG_TN : CFG_RN);
153	WR(ctx, I2S_CFG, ctx->cfg);
154	WR(ctx, I2S_ENABLE, EN_D); /* power off */
155	break;
156	default:
157	return -EINVAL;
158	}
159
160	return 0;
161	}
162
163	static unsigned long msbits_to_reg(int msbits)
164	{
165	switch (msbits) {
166	case 8:
167	return CFG_SZ_8;
168	case 16:
169	return CFG_SZ_16;
170	case 18:
171	return CFG_SZ_18;
172	case 20:
173	return CFG_SZ_20;
174	case 24:
175	return CFG_SZ_24;
176	}
177	return 0;
178	}
179
180	static int au1xi2s_hw_params(struct snd_pcm_substream *substream,
181	struct snd_pcm_hw_params *params,
182	struct snd_soc_dai *dai)
183	{
184	struct au1xpsc_audio_data *ctx = snd_soc_dai_get_drvdata(dai);
185	unsigned long v;
186
187	v = msbits_to_reg(params->msbits);
188	if (!v)
189	return -EINVAL;
190
191	ctx->cfg &= ~CFG_SZ_MASK;
192	ctx->cfg \|= v;
193	return 0;
194	}
195
196	static int au1xi2s_startup(struct snd_pcm_substream *substream,
197	struct snd_soc_dai *dai)
198	{
199	struct au1xpsc_audio_data *ctx = snd_soc_dai_get_drvdata(dai);
200	snd_soc_dai_set_dma_data(dai, substream, &ctx->dmaids[0]);
201	return 0;
202	}
203
204	static const struct snd_soc_dai_ops au1xi2s_dai_ops = {
205	.startup = au1xi2s_startup,
206	.trigger = au1xi2s_trigger,
207	.hw_params = au1xi2s_hw_params,
208	.set_fmt = au1xi2s_set_fmt,
209	};
210
211	static struct snd_soc_dai_driver au1xi2s_dai_driver = {
212	.symmetric_rates = 1,
213	.playback = {
214	.rates = AU1XI2SC_RATES,
215	.formats = AU1XI2SC_FMTS,
216	.channels_min = 2,
217	.channels_max = 2,
218	},
219	.capture = {
220	.rates = AU1XI2SC_RATES,
221	.formats = AU1XI2SC_FMTS,
222	.channels_min = 2,
223	.channels_max = 2,
224	},
225	.ops = &au1xi2s_dai_ops,
226	};
227
228	static int __devinit au1xi2s_drvprobe(struct platform_device *pdev)
229	{
230	int ret;
226d0f22	231	struct resource iores, dmares;
b3c70c9e ML	232	struct au1xpsc_audio_data *ctx;
	233
	234	ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
	235	if (!ctx)
	236	return -ENOMEM;
	237
226d0f22 JL	238	iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
226d0f22 JL	239	if (!iores) {
b3c70c9e ML	240	ret = -ENODEV;
	241	goto out0;
	242	}
	243
	244	ret = -EBUSY;
226d0f22 JL	245	if (!request_mem_region(iores->start, resource_size(iores),
226d0f22 JL	246	pdev->name))
b3c70c9e ML	247	goto out0;
b3c70c9e ML	248
226d0f22	249	ctx->mmio = ioremap_nocache(iores->start, resource_size(iores));
b3c70c9e ML	250	if (!ctx->mmio)
	251	goto out1;
	252
226d0f22 JL	253	dmares = platform_get_resource(pdev, IORESOURCE_DMA, 0);
	254	if (!dmares)
	255	goto out2;
	256	ctx->dmaids[SNDRV_PCM_STREAM_PLAYBACK] = dmares->start;
b3c70c9e	257
226d0f22 JL	258	dmares = platform_get_resource(pdev, IORESOURCE_DMA, 1);
	259	if (!dmares)
	260	goto out2;
	261	ctx->dmaids[SNDRV_PCM_STREAM_CAPTURE] = dmares->start;
b3c70c9e ML	262
	263	platform_set_drvdata(pdev, ctx);
	264
	265	ret = snd_soc_register_dai(&pdev->dev, &au1xi2s_dai_driver);
	266	if (ret)
226d0f22	267	goto out2;
b3c70c9e ML	268
	269	return 0;
	270
226d0f22 JL	271	out2:
226d0f22 JL	272	iounmap(ctx->mmio);
b3c70c9e	273	out1:
226d0f22	274	release_mem_region(iores->start, resource_size(iores));
b3c70c9e ML	275	out0:
	276	kfree(ctx);
	277	return ret;
	278	}
	279
	280	static int __devexit au1xi2s_drvremove(struct platform_device *pdev)
	281	{
	282	struct au1xpsc_audio_data *ctx = platform_get_drvdata(pdev);
	283	struct resource *r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	284
	285	snd_soc_unregister_dai(&pdev->dev);
	286
	287	WR(ctx, I2S_ENABLE, EN_D); /* clock off, disable */
	288
	289	iounmap(ctx->mmio);
	290	release_mem_region(r->start, resource_size(r));
	291	kfree(ctx);
	292
	293	return 0;
	294	}
	295
	296	#ifdef CONFIG_PM
	297	static int au1xi2s_drvsuspend(struct device *dev)
	298	{
	299	struct au1xpsc_audio_data *ctx = dev_get_drvdata(dev);
	300
	301	WR(ctx, I2S_ENABLE, EN_D); /* clock off, disable */
	302
	303	return 0;
	304	}
	305
	306	static int au1xi2s_drvresume(struct device *dev)
	307	{
	308	return 0;
	309	}
	310
	311	static const struct dev_pm_ops au1xi2sc_pmops = {
	312	.suspend = au1xi2s_drvsuspend,
	313	.resume = au1xi2s_drvresume,
	314	};
	315
	316	#define AU1XI2SC_PMOPS (&au1xi2sc_pmops)
	317
	318	#else
	319
	320	#define AU1XI2SC_PMOPS NULL
	321
	322	#endif
	323
	324	static struct platform_driver au1xi2s_driver = {
	325	.driver = {
	326	.name = "alchemy-i2sc",
	327	.owner = THIS_MODULE,
	328	.pm = AU1XI2SC_PMOPS,
	329	},
	330	.probe = au1xi2s_drvprobe,
	331	.remove = __devexit_p(au1xi2s_drvremove),
	332	};
	333
	334	static int __init au1xi2s_load(void)
	335	{
	336	return platform_driver_register(&au1xi2s_driver);
	337	}
	338
339	static void __exit au1xi2s_unload(void)
340	{
341	platform_driver_unregister(&au1xi2s_driver);
342	}
343
344	module_init(au1xi2s_load);
345	module_exit(au1xi2s_unload);
346
347	MODULE_LICENSE("GPL");
348	MODULE_DESCRIPTION("Au1000/1500/1100 I2S ASoC driver");
349	MODULE_AUTHOR("Manuel Lauss");