[linux-2.6-block.git] / sound / soc / au1x / ac97c.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Au1000/Au1500/Au1100 AC97C controller driver for ASoC
 *
 * (c) 2011 Manuel Lauss <manuel.lauss@googlemail.com>
 *
 * based on the old ALSA driver originally written by
 *			Charles Eidsness <charles@cooper-street.com>
 */

#include <linux/init.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/device.h>
#include <linux/delay.h>
#include <linux/mutex.h>
#include <linux/platform_device.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"

/* register offsets and bits */
#define AC97_CONFIG	0x00
#define AC97_STATUS	0x04
#define AC97_DATA	0x08
#define AC97_CMDRESP	0x0c
#define AC97_ENABLE	0x10

#define CFG_RC(x)	(((x) & 0x3ff) << 13)	/* valid rx slots mask */
#define CFG_XS(x)	(((x) & 0x3ff) << 3)	/* valid tx slots mask */
#define CFG_SG		(1 << 2)	/* sync gate */
#define CFG_SN		(1 << 1)	/* sync control */
#define CFG_RS		(1 << 0)	/* acrst# control */
#define STAT_XU		(1 << 11)	/* tx underflow */
#define STAT_XO		(1 << 10)	/* tx overflow */
#define STAT_RU		(1 << 9)	/* rx underflow */
#define STAT_RO		(1 << 8)	/* rx overflow */
#define STAT_RD		(1 << 7)	/* codec ready */
#define STAT_CP		(1 << 6)	/* command pending */
#define STAT_TE		(1 << 4)	/* tx fifo empty */
#define STAT_TF		(1 << 3)	/* tx fifo full */
#define STAT_RE		(1 << 1)	/* rx fifo empty */
#define STAT_RF		(1 << 0)	/* rx fifo full */
#define CMD_SET_DATA(x)	(((x) & 0xffff) << 16)
#define CMD_GET_DATA(x)	((x) & 0xffff)
#define CMD_READ	(1 << 7)
#define CMD_WRITE	(0 << 7)
#define CMD_IDX(x)	((x) & 0x7f)
#define EN_D		(1 << 1)	/* DISable bit */
#define EN_CE		(1 << 0)	/* clock enable bit */

/* how often to retry failed codec register reads/writes */
#define AC97_RW_RETRIES	5

#define AC97_RATES	\
	SNDRV_PCM_RATE_CONTINUOUS

#define AC97_FMTS	\
	(SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE)

/* instance data. There can be only one, MacLeod!!!!, fortunately there IS only
 * once AC97C on early Alchemy chips. The newer ones aren't so lucky.
 */
static struct au1xpsc_audio_data *ac97c_workdata;
#define ac97_to_ctx(x)		ac97c_workdata

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 unsigned short au1xac97c_ac97_read(struct snd_ac97 *ac97,
					  unsigned short r)
{
	struct au1xpsc_audio_data *ctx = ac97_to_ctx(ac97);
	unsigned int tmo, retry;
	unsigned long data;

	data = ~0;
	retry = AC97_RW_RETRIES;
	do {
		mutex_lock(&ctx->lock);

		tmo = 6;
		while ((RD(ctx, AC97_STATUS) & STAT_CP) && --tmo)
			udelay(21);	/* wait an ac97 frame time */
		if (!tmo) {
			pr_debug("ac97rd timeout #1\n");
			goto next;
		}

		WR(ctx, AC97_CMDRESP, CMD_IDX(r) | CMD_READ);

		/* stupid errata: data is only valid for 21us, so
		 * poll, Forrest, poll...
		 */
		tmo = 0x10000;
		while ((RD(ctx, AC97_STATUS) & STAT_CP) && --tmo)
			asm volatile ("nop");
		data = RD(ctx, AC97_CMDRESP);

		if (!tmo)
			pr_debug("ac97rd timeout #2\n");

next:
		mutex_unlock(&ctx->lock);
	} while (--retry && !tmo);

	pr_debug("AC97RD %04x %04lx %d\n", r, data, retry);

	return retry ? data & 0xffff : 0xffff;
}

static void au1xac97c_ac97_write(struct snd_ac97 *ac97, unsigned short r,
				 unsigned short v)
{
	struct au1xpsc_audio_data *ctx = ac97_to_ctx(ac97);
	unsigned int tmo, retry;

	retry = AC97_RW_RETRIES;
	do {
		mutex_lock(&ctx->lock);

		for (tmo = 5; (RD(ctx, AC97_STATUS) & STAT_CP) && tmo; tmo--)
			udelay(21);
		if (!tmo) {
			pr_debug("ac97wr timeout #1\n");
			goto next;
		}

		WR(ctx, AC97_CMDRESP, CMD_WRITE | CMD_IDX(r) | CMD_SET_DATA(v));

		for (tmo = 10; (RD(ctx, AC97_STATUS) & STAT_CP) && tmo; tmo--)
			udelay(21);
		if (!tmo)
			pr_debug("ac97wr timeout #2\n");
next:
		mutex_unlock(&ctx->lock);
	} while (--retry && !tmo);

	pr_debug("AC97WR %04x %04x %d\n", r, v, retry);
}

static void au1xac97c_ac97_warm_reset(struct snd_ac97 *ac97)
{
	struct au1xpsc_audio_data *ctx = ac97_to_ctx(ac97);

	WR(ctx, AC97_CONFIG, ctx->cfg | CFG_SG | CFG_SN);
	msleep(20);
	WR(ctx, AC97_CONFIG, ctx->cfg | CFG_SG);
	WR(ctx, AC97_CONFIG, ctx->cfg);
}

static void au1xac97c_ac97_cold_reset(struct snd_ac97 *ac97)
{
	struct au1xpsc_audio_data *ctx = ac97_to_ctx(ac97);
	int i;

	WR(ctx, AC97_CONFIG, ctx->cfg | CFG_RS);
	msleep(500);
	WR(ctx, AC97_CONFIG, ctx->cfg);

	/* wait for codec ready */
	i = 50;
	while (((RD(ctx, AC97_STATUS) & STAT_RD) == 0) && --i)
		msleep(20);
	if (!i)
		printk(KERN_ERR "ac97c: codec not ready after cold reset\n");
}

/* AC97 controller operations */
static struct snd_ac97_bus_ops ac97c_bus_ops = {
	.read		= au1xac97c_ac97_read,
	.write		= au1xac97c_ac97_write,
	.reset		= au1xac97c_ac97_cold_reset,
	.warm_reset	= au1xac97c_ac97_warm_reset,
};

static int alchemy_ac97c_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 alchemy_ac97c_ops = {
	.startup		= alchemy_ac97c_startup,
};

static int au1xac97c_dai_probe(struct snd_soc_dai *dai)
{
	return ac97c_workdata ? 0 : -ENODEV;
}

static struct snd_soc_dai_driver au1xac97c_dai_driver = {
	.name			= "alchemy-ac97c",
	.bus_control		= true,
	.probe			= au1xac97c_dai_probe,
	.playback = {
		.rates		= AC97_RATES,
		.formats	= AC97_FMTS,
		.channels_min	= 2,
		.channels_max	= 2,
	},
	.capture = {
		.rates		= AC97_RATES,
		.formats	= AC97_FMTS,
		.channels_min	= 2,
		.channels_max	= 2,
	},
	.ops			= &alchemy_ac97c_ops,
};

static const struct snd_soc_component_driver au1xac97c_component = {
	.name		= "au1xac97c",
};

static int au1xac97c_drvprobe(struct platform_device *pdev)
{
	int ret;
	struct resource *iores, *dmares;
	struct au1xpsc_audio_data *ctx;

	ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL);
	if (!ctx)
		return -ENOMEM;

	mutex_init(&ctx->lock);

	iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!iores)
		return -ENODEV;

	if (!devm_request_mem_region(&pdev->dev, iores->start,
				     resource_size(iores),
				     pdev->name))
		return -EBUSY;

	ctx->mmio = devm_ioremap_nocache(&pdev->dev, iores->start,
					 resource_size(iores));
	if (!ctx->mmio)
		return -EBUSY;

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

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

	/* switch it on */
	WR(ctx, AC97_ENABLE, EN_D | EN_CE);
	WR(ctx, AC97_ENABLE, EN_CE);

	ctx->cfg = CFG_RC(3) | CFG_XS(3);
	WR(ctx, AC97_CONFIG, ctx->cfg);

	platform_set_drvdata(pdev, ctx);

	ret = snd_soc_set_ac97_ops(&ac97c_bus_ops);
	if (ret)
		return ret;

	ret = snd_soc_register_component(&pdev->dev, &au1xac97c_component,
					 &au1xac97c_dai_driver, 1);
	if (ret)
		return ret;

	ac97c_workdata = ctx;
	return 0;
}

static int au1xac97c_drvremove(struct platform_device *pdev)
{
	struct au1xpsc_audio_data *ctx = platform_get_drvdata(pdev);

	snd_soc_unregister_component(&pdev->dev);

	WR(ctx, AC97_ENABLE, EN_D);	/* clock off, disable */

	ac97c_workdata = NULL;	/* MDEV */

	return 0;
}

#ifdef CONFIG_PM
static int au1xac97c_drvsuspend(struct device *dev)
{
	struct au1xpsc_audio_data *ctx = dev_get_drvdata(dev);

	WR(ctx, AC97_ENABLE, EN_D);	/* clock off, disable */

	return 0;
}

static int au1xac97c_drvresume(struct device *dev)
{
	struct au1xpsc_audio_data *ctx = dev_get_drvdata(dev);

	WR(ctx, AC97_ENABLE, EN_D | EN_CE);
	WR(ctx, AC97_ENABLE, EN_CE);
	WR(ctx, AC97_CONFIG, ctx->cfg);

	return 0;
}

static const struct dev_pm_ops au1xpscac97_pmops = {
	.suspend	= au1xac97c_drvsuspend,
	.resume		= au1xac97c_drvresume,
};

#define AU1XPSCAC97_PMOPS (&au1xpscac97_pmops)

#else

#define AU1XPSCAC97_PMOPS NULL

#endif

static struct platform_driver au1xac97c_driver = {
	.driver	= {
		.name	= "alchemy-ac97c",
		.pm	= AU1XPSCAC97_PMOPS,
	},
	.probe		= au1xac97c_drvprobe,
	.remove		= au1xac97c_drvremove,
};

module_platform_driver(au1xac97c_driver);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Au1000/1500/1100 AC97C ASoC driver");
MODULE_AUTHOR("Manuel Lauss");
Commit	Line	Data
09c434b8	1	// SPDX-License-Identifier: GPL-2.0-only
b3c70c9e ML	2	/*
	3	* Au1000/Au1500/Au1100 AC97C controller driver for ASoC
	4	*
	5	* (c) 2011 Manuel Lauss <manuel.lauss@googlemail.com>
	6	*
	7	* based on the old ALSA driver originally written by
	8	* Charles Eidsness <charles@cooper-street.com>
	9	*/
	10
	11	#include <linux/init.h>
	12	#include <linux/module.h>
	13	#include <linux/slab.h>
	14	#include <linux/device.h>
	15	#include <linux/delay.h>
	16	#include <linux/mutex.h>
	17	#include <linux/platform_device.h>
	18	#include <linux/suspend.h>
	19	#include <sound/core.h>
	20	#include <sound/pcm.h>
	21	#include <sound/initval.h>
	22	#include <sound/soc.h>
	23	#include <asm/mach-au1x00/au1000.h>
	24
	25	#include "psc.h"
	26
	27	/* register offsets and bits */
	28	#define AC97_CONFIG 0x00
	29	#define AC97_STATUS 0x04
	30	#define AC97_DATA 0x08
	31	#define AC97_CMDRESP 0x0c
	32	#define AC97_ENABLE 0x10
	33
	34	#define CFG_RC(x) (((x) & 0x3ff) << 13) /* valid rx slots mask */
	35	#define CFG_XS(x) (((x) & 0x3ff) << 3) /* valid tx slots mask */
	36	#define CFG_SG (1 << 2) /* sync gate */
	37	#define CFG_SN (1 << 1) /* sync control */
	38	#define CFG_RS (1 << 0) /* acrst# control */
	39	#define STAT_XU (1 << 11) /* tx underflow */
	40	#define STAT_XO (1 << 10) /* tx overflow */
	41	#define STAT_RU (1 << 9) /* rx underflow */
	42	#define STAT_RO (1 << 8) /* rx overflow */
	43	#define STAT_RD (1 << 7) /* codec ready */
	44	#define STAT_CP (1 << 6) /* command pending */
	45	#define STAT_TE (1 << 4) /* tx fifo empty */
	46	#define STAT_TF (1 << 3) /* tx fifo full */
	47	#define STAT_RE (1 << 1) /* rx fifo empty */
	48	#define STAT_RF (1 << 0) /* rx fifo full */
	49	#define CMD_SET_DATA(x) (((x) & 0xffff) << 16)
	50	#define CMD_GET_DATA(x) ((x) & 0xffff)
	51	#define CMD_READ (1 << 7)
	52	#define CMD_WRITE (0 << 7)
	53	#define CMD_IDX(x) ((x) & 0x7f)
	54	#define EN_D (1 << 1) /* DISable bit */
	55	#define EN_CE (1 << 0) /* clock enable bit */
	56
	57	/* how often to retry failed codec register reads/writes */
	58	#define AC97_RW_RETRIES 5
	59
	60	#define AC97_RATES \
	61	SNDRV_PCM_RATE_CONTINUOUS
	62
	63	#define AC97_FMTS \
	64	(SNDRV_PCM_FMTBIT_S16_LE \| SNDRV_PCM_FMTBIT_S16_BE)
	65
66	/* instance data. There can be only one, MacLeod!!!!, fortunately there IS only
67	* once AC97C on early Alchemy chips. The newer ones aren't so lucky.
68	*/
69	static struct au1xpsc_audio_data *ac97c_workdata;
70	#define ac97_to_ctx(x) ac97c_workdata
71
72	static inline unsigned long RD(struct au1xpsc_audio_data *ctx, int reg)
73	{
74	return __raw_readl(ctx->mmio + reg);
75	}
76
77	static inline void WR(struct au1xpsc_audio_data *ctx, int reg, unsigned long v)
78	{
79	__raw_writel(v, ctx->mmio + reg);
80	wmb();
81	}
82
83	static unsigned short au1xac97c_ac97_read(struct snd_ac97 *ac97,
84	unsigned short r)
85	{
86	struct au1xpsc_audio_data *ctx = ac97_to_ctx(ac97);
87	unsigned int tmo, retry;
88	unsigned long data;
89
90	data = ~0;
91	retry = AC97_RW_RETRIES;
92	do {
93	mutex_lock(&ctx->lock);
94
123af904 DC	95	tmo = 6;
123af904 DC	96	while ((RD(ctx, AC97_STATUS) & STAT_CP) && --tmo)
b3c70c9e ML	97	udelay(21); /* wait an ac97 frame time */
	98	if (!tmo) {
	99	pr_debug("ac97rd timeout #1\n");
	100	goto next;
	101	}
	102
	103	WR(ctx, AC97_CMDRESP, CMD_IDX(r) \| CMD_READ);
	104
	105	/* stupid errata: data is only valid for 21us, so
	106	* poll, Forrest, poll...
	107	*/
	108	tmo = 0x10000;
123af904	109	while ((RD(ctx, AC97_STATUS) & STAT_CP) && --tmo)
b3c70c9e ML	110	asm volatile ("nop");
	111	data = RD(ctx, AC97_CMDRESP);
	112
	113	if (!tmo)
	114	pr_debug("ac97rd timeout #2\n");
	115
	116	next:
	117	mutex_unlock(&ctx->lock);
	118	} while (--retry && !tmo);
	119
	120	pr_debug("AC97RD %04x %04lx %d\n", r, data, retry);
	121
	122	return retry ? data & 0xffff : 0xffff;
	123	}
	124
	125	static void au1xac97c_ac97_write(struct snd_ac97 *ac97, unsigned short r,
	126	unsigned short v)
	127	{
	128	struct au1xpsc_audio_data *ctx = ac97_to_ctx(ac97);
	129	unsigned int tmo, retry;
	130
	131	retry = AC97_RW_RETRIES;
	132	do {
	133	mutex_lock(&ctx->lock);
	134
	135	for (tmo = 5; (RD(ctx, AC97_STATUS) & STAT_CP) && tmo; tmo--)
	136	udelay(21);
	137	if (!tmo) {
	138	pr_debug("ac97wr timeout #1\n");
	139	goto next;
	140	}
	141
	142	WR(ctx, AC97_CMDRESP, CMD_WRITE \| CMD_IDX(r) \| CMD_SET_DATA(v));
	143
	144	for (tmo = 10; (RD(ctx, AC97_STATUS) & STAT_CP) && tmo; tmo--)
	145	udelay(21);
	146	if (!tmo)
	147	pr_debug("ac97wr timeout #2\n");
	148	next:
	149	mutex_unlock(&ctx->lock);
	150	} while (--retry && !tmo);
	151
	152	pr_debug("AC97WR %04x %04x %d\n", r, v, retry);
	153	}
	154
	155	static void au1xac97c_ac97_warm_reset(struct snd_ac97 *ac97)
	156	{
	157	struct au1xpsc_audio_data *ctx = ac97_to_ctx(ac97);
	158
	159	WR(ctx, AC97_CONFIG, ctx->cfg \| CFG_SG \| CFG_SN);
	160	msleep(20);
	161	WR(ctx, AC97_CONFIG, ctx->cfg \| CFG_SG);
	162	WR(ctx, AC97_CONFIG, ctx->cfg);
	163	}
	164
	165	static void au1xac97c_ac97_cold_reset(struct snd_ac97 *ac97)
	166	{
	167	struct au1xpsc_audio_data *ctx = ac97_to_ctx(ac97);
	168	int i;
	169
	170	WR(ctx, AC97_CONFIG, ctx->cfg \| CFG_RS);
	171	msleep(500);
	172	WR(ctx, AC97_CONFIG, ctx->cfg);
	173
174	/* wait for codec ready */
175	i = 50;
176	while (((RD(ctx, AC97_STATUS) & STAT_RD) == 0) && --i)
177	msleep(20);
178	if (!i)
179	printk(KERN_ERR "ac97c: codec not ready after cold reset\n");
180	}
181
182	/* AC97 controller operations */
b047e1cc	183	static struct snd_ac97_bus_ops ac97c_bus_ops = {
b3c70c9e ML	184	.read = au1xac97c_ac97_read,
	185	.write = au1xac97c_ac97_write,
	186	.reset = au1xac97c_ac97_cold_reset,
	187	.warm_reset = au1xac97c_ac97_warm_reset,
	188	};
b3c70c9e ML	189
	190	static int alchemy_ac97c_startup(struct snd_pcm_substream *substream,
	191	struct snd_soc_dai *dai)
	192	{
	193	struct au1xpsc_audio_data *ctx = snd_soc_dai_get_drvdata(dai);
	194	snd_soc_dai_set_dma_data(dai, substream, &ctx->dmaids[0]);
	195	return 0;
	196	}
	197
85e7652d	198	static const struct snd_soc_dai_ops alchemy_ac97c_ops = {
b3c70c9e ML	199	.startup = alchemy_ac97c_startup,
	200	};
	201
	202	static int au1xac97c_dai_probe(struct snd_soc_dai *dai)
	203	{
	204	return ac97c_workdata ? 0 : -ENODEV;
	205	}
	206
	207	static struct snd_soc_dai_driver au1xac97c_dai_driver = {
	208	.name = "alchemy-ac97c",
bc263214	209	.bus_control = true,
b3c70c9e ML	210	.probe = au1xac97c_dai_probe,
	211	.playback = {
	212	.rates = AC97_RATES,
	213	.formats = AC97_FMTS,
	214	.channels_min = 2,
	215	.channels_max = 2,
	216	},
	217	.capture = {
	218	.rates = AC97_RATES,
	219	.formats = AC97_FMTS,
	220	.channels_min = 2,
	221	.channels_max = 2,
	222	},
	223	.ops = &alchemy_ac97c_ops,
	224	};
	225
bbedf1b2 KM	226	static const struct snd_soc_component_driver au1xac97c_component = {
	227	.name = "au1xac97c",
	228	};
	229
5c658be0	230	static int au1xac97c_drvprobe(struct platform_device *pdev)
b3c70c9e ML	231	{
b3c70c9e ML	232	int ret;
226d0f22	233	struct resource iores, dmares;
b3c70c9e ML	234	struct au1xpsc_audio_data *ctx;
b3c70c9e ML	235
6065abf5	236	ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL);
b3c70c9e ML	237	if (!ctx)
	238	return -ENOMEM;
	239
	240	mutex_init(&ctx->lock);
	241
226d0f22	242	iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
6065abf5 JL	243	if (!iores)
6065abf5 JL	244	return -ENODEV;
b3c70c9e	245
6065abf5 JL	246	if (!devm_request_mem_region(&pdev->dev, iores->start,
	247	resource_size(iores),
	248	pdev->name))
	249	return -EBUSY;
b3c70c9e	250
6065abf5 JL	251	ctx->mmio = devm_ioremap_nocache(&pdev->dev, iores->start,
6065abf5 JL	252	resource_size(iores));
b3c70c9e	253	if (!ctx->mmio)
6065abf5	254	return -EBUSY;
b3c70c9e	255
226d0f22 JL	256	dmares = platform_get_resource(pdev, IORESOURCE_DMA, 0);
226d0f22 JL	257	if (!dmares)
6065abf5	258	return -EBUSY;
226d0f22	259	ctx->dmaids[SNDRV_PCM_STREAM_PLAYBACK] = dmares->start;
b3c70c9e	260
226d0f22 JL	261	dmares = platform_get_resource(pdev, IORESOURCE_DMA, 1);
226d0f22 JL	262	if (!dmares)
6065abf5	263	return -EBUSY;
226d0f22	264	ctx->dmaids[SNDRV_PCM_STREAM_CAPTURE] = dmares->start;
b3c70c9e ML	265
	266	/* switch it on */
	267	WR(ctx, AC97_ENABLE, EN_D \| EN_CE);
	268	WR(ctx, AC97_ENABLE, EN_CE);
	269
	270	ctx->cfg = CFG_RC(3) \| CFG_XS(3);
	271	WR(ctx, AC97_CONFIG, ctx->cfg);
	272
	273	platform_set_drvdata(pdev, ctx);
	274
b047e1cc MB	275	ret = snd_soc_set_ac97_ops(&ac97c_bus_ops);
	276	if (ret)
	277	return ret;
	278
bbedf1b2 KM	279	ret = snd_soc_register_component(&pdev->dev, &au1xac97c_component,
bbedf1b2 KM	280	&au1xac97c_dai_driver, 1);
b3c70c9e	281	if (ret)
6065abf5	282	return ret;
b3c70c9e ML	283
	284	ac97c_workdata = ctx;
	285	return 0;
b3c70c9e ML	286	}
b3c70c9e ML	287
5c658be0	288	static int au1xac97c_drvremove(struct platform_device *pdev)
b3c70c9e ML	289	{
b3c70c9e ML	290	struct au1xpsc_audio_data *ctx = platform_get_drvdata(pdev);
b3c70c9e	291
bbedf1b2	292	snd_soc_unregister_component(&pdev->dev);
b3c70c9e ML	293
	294	WR(ctx, AC97_ENABLE, EN_D); /* clock off, disable */
	295
b3c70c9e ML	296	ac97c_workdata = NULL; /* MDEV */
	297
	298	return 0;
	299	}
	300
	301	#ifdef CONFIG_PM
	302	static int au1xac97c_drvsuspend(struct device *dev)
	303	{
	304	struct au1xpsc_audio_data *ctx = dev_get_drvdata(dev);
	305
	306	WR(ctx, AC97_ENABLE, EN_D); /* clock off, disable */
	307
	308	return 0;
	309	}
	310
	311	static int au1xac97c_drvresume(struct device *dev)
	312	{
	313	struct au1xpsc_audio_data *ctx = dev_get_drvdata(dev);
	314
	315	WR(ctx, AC97_ENABLE, EN_D \| EN_CE);
	316	WR(ctx, AC97_ENABLE, EN_CE);
	317	WR(ctx, AC97_CONFIG, ctx->cfg);
	318
	319	return 0;
	320	}
	321
	322	static const struct dev_pm_ops au1xpscac97_pmops = {
	323	.suspend = au1xac97c_drvsuspend,
	324	.resume = au1xac97c_drvresume,
	325	};
	326
	327	#define AU1XPSCAC97_PMOPS (&au1xpscac97_pmops)
	328
	329	#else
	330
	331	#define AU1XPSCAC97_PMOPS NULL
	332
	333	#endif
	334
	335	static struct platform_driver au1xac97c_driver = {
	336	.driver = {
	337	.name = "alchemy-ac97c",
b3c70c9e ML	338	.pm = AU1XPSCAC97_PMOPS,
	339	},
	340	.probe = au1xac97c_drvprobe,
5c658be0	341	.remove = au1xac97c_drvremove,
b3c70c9e ML	342	};
b3c70c9e ML	343
d2ee88d0	344	module_platform_driver(au1xac97c_driver);
b3c70c9e ML	345
	346	MODULE_LICENSE("GPL");
	347	MODULE_DESCRIPTION("Au1000/1500/1100 AC97C ASoC driver");
	348	MODULE_AUTHOR("Manuel Lauss");